JP2000219067A - Electric sheet - Google Patents

Abstract

(57) [Summary] [Problem] To avoid unnecessary unnecessary headrest automatic adjustment while taking advantage of the headrest automatic adjustment. Avoids automatic headrest adjustment when position data is incorrect. SOLUTION: In an electric sheet provided with control means 10, 9a, 9b; for performing automatic adjustment for automatically driving a headrest 3 up and down to an appropriate height PBo corresponding to a slide position RPA: With up / down drive,
Registration posture set, excessive inclination of seatback 2, prohibition /
When the permission switch SE indicates a prohibition instruction, no seating, etc.,
Inhibit automatic adjustment. After that, the slide drive amount becomes the set value ΔPA
The headrest 3 is automatically adjusted when the slide drive time exceeds Th, the door is opened, the seatback 2 rises, the switch SE is permitted, the occupant is present, etc. The slide position RPA & headrest height RPB are stored in the non-volatile memory 17.
And read when the power is on. The data is written to the memory 17 during driving at the start of driving and erased at the end of driving, and the correctness of the position data is determined based on this information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric seat for driving an occupant or a member for supporting a part thereof by an electric mechanism. The present invention relates to an electric seat mounted on a vehicle, including an electric driving mechanism A for driving a sheet in a direction and an electric driving mechanism B for driving a headrest in a vertical direction.

[0002]

2. Description of the Related Art An electric seat of this type is used, for example, for a driver seat on a vehicle and an adjacent seat (a front seat). A position detector is coupled to the drive mechanism, and the seat front-back position set by the seated person is stored in the memory.
Once stored in the memory, the storage location is reproduced simply by pressing the automatic setting instruction key. The position detector is, for example,
A limit switch for detecting the movement limit point of the mechanism, and a rotary encoder connected to the mechanism, and when the CPU, which is the main body of the seat attitude controller, detects the limit position by the limit switch. Then, the position data is updated to the data assigned to the limit position. For example, when the lower limit position is detected, the position data is initialized to data indicating 0, and when the upper limit position is detected, the position data is updated to indicate the upper limit position Pmax. While the mechanism is moving in the direction from the lower limit position to the upper limit position, the CPU
Counts up the movement synchronization pulse generated by the rotary encoder, and counts down during the operation of the mechanism in the reverse direction to update the position data. Normally, the drive mode
An overload detector for detecting an overcurrent of the motor is provided. If the overload detector detects an overcurrent, the mechanism drive is stopped on the assumption that a mechanism trouble or a limit position has been reached. Utilizing this, position detection that recognizes that the mechanism has reached the lower limit position and the upper limit position is also known.

When a position setting (automatic attitude setting) to a storage position is instructed, the CPU compares the held position data (current position) with the target position with the storage position of the memory as the target position. The mechanism driving direction (rotation direction of the electric motor) is determined and the mechanism is driven. When the position data reaches the target position, the mechanism driving is stopped.

[0004] In position grasping in which position data is updated by counting up / down of a movement synchronization pulse, when position data is lost due to power-off, when power-on is restored,
There is no position data. That is, the seat position is not known. Therefore, immediately after the power is turned on, when the sheet is driven in the direction toward the lower limit position (or upper limit position) to reach the lower limit position (upper limit position), the position data indicates the lower limit position (upper limit position). The position data is correctly determined by initializing the position data. Since this operation takes a long time, a nonvolatile memory is provided in the seat attitude controller, and the position data is written in the memory and saved even when the power is turned off. When the power is turned on, the position data is stored. Has been read and used as a representation of the current position of the sheet.

[0005]

By the way, even when a nonvolatile memory is used, the relative timing of each of the updating of the position data, the updating and writing of the position data in the nonvolatile memory, and the turning off of the power supply is described. Depending on the relationship, the position data stored in the non-volatile memory may be incorrect. For example, when the sheet drive is started, the position data at the end of the sheet drive is written in the non-volatile memory. If the power is turned off during the sheet drive, the position data of the memory is read. Remain just before the start of the sheet driving. In order to avoid this, every time the position data changes, the position data is stored in the memory.
Even if the data is written, if the power is turned off during the sheet drive (during the counting of the movement synchronization pulse), the rotary encoder or the input circuit goes down before the operation of the mechanism stops, and the pulse count error occurs. May occur, or the writing of position data to the nonvolatile memory may not be completed normally, etc., and a shift may occur between the position data of the nonvolatile memory and the actual sheet position. is there. Further, it cannot be determined whether the data in the nonvolatile memory is normal.

Recently, there has also been proposed an automatic headrest adjustment in which a target position of a headrest is calculated from a front-back position (sliding position) of the sheet, and a vertical position of the headrest is automatically determined in accordance with the sheet position. (For example, German Utility Model No. 9421781). According to this,
When the slide position of the headrest is adjusted, the height of the headrest is linked to this, and the height appropriate for the slide position (standard value)
Therefore, the occupant only has to adjust the headrest by a small amount according to the individual body shape.

However, if the slide adjustment is performed after adjusting the height of the headrest according to the user's preference (or body shape), the adjusted headrest height changes in conjunction with the slide adjustment, and again the headrest height is changed. You have to adjust it to your liking. When the sheet is slid to search for coins dropped on the floor, the headrest is moved up and down unnecessarily. Further, when the reclining is depressed for resting and the slide is operated rearward, the headrest is raised (projected) with the rearward slide, which may interfere with a child seat or luggage of the rear seat. Therefore, there is a need for a control for automatic adjustment of the headrest, which appropriately corresponds to the mode of use of the electric sheet.

[0008] As described above, in the aspect in which the position data is stored in the non-volatile memory, the position of the non-volatile memory is restored when the power is turned on when the sheet is being driven when the power was last turned off. It is not possible to judge whether the data is normal or not, and the headrest may be automatically adjusted at the shifted position.

The first object of the present invention is to prevent the automatic adjustment of the headrest unnecessary for the user as much as possible, and to achieve the advantage without minimizing the advantage of the automatic adjustment of the headrest. This is the purpose of 2. When a non-volatile memory is used for storing position data, a third object is to enable evaluation of the reliability of the position data of the non-volatile memory, and the position data of the non-volatile memory can be evaluated. The fourth is to prevent errors in headrest automatic adjustment due to errors in
The purpose of.

[0010]

Means for Solving the Problems (1) An electric drive mechanism A for driving the sheets (1 to 3) in the front-rear direction as viewed from the seated person; detecting the sheet position (RPA) in the front-rear direction. Front / rear position detection means
(A2, A3, 6a, 9a, 10); an electric drive mechanism B for vertically driving the headrest (3) of the sheet; a headrest position detecting means (B2, B
Means for inputting a driving instruction (SB, SC); and controlling at least one of the electric driving mechanisms A and B in response to the driving instruction from the input means, and Control means for performing automatic adjustment (54 to 60 in FIG. 7) of the headrest (3) to drive the headrest (3) via the electric drive mechanism B to the vertical position (PBo) corresponding to the seat position (RPA). (10, 9a, 9b); when the headrest (3) is driven in response to a driving instruction from the input means (SB, SC), means (CPU10) for inhibiting the headrest automatic adjustment. 8; 79-FIG. 6, 51-52-54-FIG. 7, ArP, 57-63 bypass).

To facilitate understanding, reference numerals or corresponding items of the corresponding elements of the embodiment shown in the drawings and described later are added in parentheses for reference. The same applies to the following.

According to this, the user operates the input means (S
(B, SC), when the front-back (slide) driving of the sheet is instructed, the sheet moves in the front-back direction, and in conjunction with this, automatically moves to the height corresponding to the sheet front-back position (PBo). The headrest moves. That is, the control means (10, 9a, 9b) executes headrest automatic adjustment.

When the user does not agree with the standard heights (PBs), the user adjusts the headrest position by instructing vertical driving of the headrest by the input means (SB, SC). Then, headrest automatic adjustment is prohibited there,
Even if there is a slide drive (forward or backward drive) of the sheet in accordance with the drive instruction by the input means (SB, SC), the headrest does not move in conjunction therewith. The probability that unnecessary automatic headrest adjustment will function is reduced. At the time of readjustment of the front / rear position of the sheet after the adjustment of the vertical position of the headrest, since the headrest does not interlock with the sliding movement of the sheet, the headrest position adjustment at the end of the user is not wasted. When it is desired to readjust the headrest vertical position after the sliding movement of the sheet, a headrest driving instruction may be given by the input means (SB, SC). After the vertical adjustment of the headrest, the adjustment of the front and rear position of the seat and the adjustment of the vertical position of the headrest can be adjusted independently of each other. Position and headrest height can be set.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (2) Electric drive mechanism A for driving sheets (1-3) in the front-back direction as viewed from a seated person; front-back position for detecting the front-back sheet position (RPA) Detection means (A2, A3, 6
a, 9a, 10); an electric drive mechanism B for vertically driving the headrest (3) of the sheet; a vertical position (R
PB) headrest position detecting means (B2, B3, 6b, 9b,
10); means (SB, SD, SC) for inputting a drive instruction, a registration instruction and an instruction for automatic setting to a registered position; and at least one of the electric drive mechanisms A or B in response to the drive instruction by the input means. Either is controlled, and the sheet position (R
PA), the headrest 3 is automatically adjusted (57-63 in FIGS. 6 and 7) to drive the headrest 3 via the electric drive mechanism B at the vertical position (PBo) corresponding to the position PBO. The seat position (RPA) in the front-rear direction and the vertical position (RPB) of the headrest at that time are registered in the memory, and in response to an instruction for automatic setting of the registered position, the seat is stored in the memory. Control means for driving the head and the headrest
(10, 9a, 9b); in the electric sheet having: (10, 9a, 9b) the control means (10, 9a, 9b) instructs automatic setting to the registration position (SC on)
Means for prohibiting the headrest automatic adjustment when the seat and the headrest are driven to a position registered in the memory in response to (CPU 10; 79 in FIG. 8, 51-52-54 in FIG. 6, ArP in FIG. 6,
57-63).

When the automatic posture setting for determining the seat posture is performed for the registered posture, the posture of the electric seat is the posture registered as appropriate by the user. The shift of the headrest from the registered position in conjunction with the position adjustment may detract from the advantage of the automatic posture setting.

In this embodiment, since the automatic adjustment of the headrest is prohibited when the automatic posture setting is performed, the advantage of the automatic posture setting is utilized. (3-1) The prohibition means (CPU 10) controls the control means (1) while prohibiting the headrest automatic adjustment (FHB = 1).
(0, 9a, 9b) drives the sheet in the front-rear direction greater than the set value (ΔPAp), the prohibition of the headrest automatic adjustment is canceled (FHB = 0) (52, 53 in FIG. 6).

By the way, for example, when the present electric seat is used for a driver seat on a vehicle, the driver (seated person) may be changed. When this change is made, there is a high possibility that a sheet front-back driving instruction is given by the input means (SB, SC). At this time, if the headrest position adjustment is prohibited, the replaced seated occupant must drive the headrest up and down after driving the seat back and forth, which is inconvenient.
In the present embodiment, in order to improve this, the prohibition of the automatic adjustment of the headrest is released when the amount of front and rear driving of the sheet exceeds a set value (ΔPAp; for example, 2 cm). Therefore, when the sheet front-back driving amount exceeds the set value (ΔPAp), the headrest is driven to the height (PBo) corresponding to the sheet front-back position, and then the sheet front-back driving is continued. ,
The height of the headrest changes in conjunction with the forward and backward movement of the sheet. (3-2) While the prohibition means (CPU 10) prohibits the automatic headrest adjustment (FHB = 1), the control means (1
(0, 9a, 9b) drives the sheet in the front-rear direction for a set time (Th) or more, and releases the prohibition of the headrest automatic adjustment.
(FHB = 0) (54, 53 in FIG. 6).

In this embodiment, the prohibition of the automatic adjustment of the headrest is released when the driving time before and after the sheet reaches the set time (Th; for example, the time required for driving by 2 cm). Therefore, when the sheet front-back driving time reaches the set time (Th), the headrest is moved to the height (P) corresponding to the sheet front-back position.
Bo), and then the height of the headrest changes in conjunction with the forward and backward movement of the sheet while the forward and backward driving of the sheet continues. (4) an electric drive mechanism A for driving the sheets (1 to 3) in the front-rear direction as viewed from the seated person; front-rear position detection means (A2, A3, 6a, 9a, 10); an electric drive mechanism B for vertically driving the headrest (3) of the sheet; a headrest position detecting means (B2, B3, 6b, 9b) for detecting the vertical position (RPB) of the headrest. Means for inputting a driving instruction (SB, SC); and controlling at least one of the electric driving mechanisms A and B in response to the driving instruction from the input means, to set a seat position in the front-rear direction ( RPA), the headrest (3) is automatically adjusted by driving the headrest (3) to the vertical position (PBo) associated with the headrest (3) via the electric drive mechanism B (FIG. 7).
54 to 60), control means (10, 9a, 9b); in an electric seat mounted on a vehicle: a door which is opened and closed when the user sits on the electric seat and exits from the electric seat. Prohibiting the headrest automatic adjustment when the headrest (3) is driven according to a driving instruction from the input means (SB, SC) when the means for detecting opening and closing (SF) is in a state indicating that the door is closed. (CPU 10; 79 in FIG. 8, 51-52-54 in FIG. 6-Ar in FIG. 7)
P, 57-63).

This embodiment is an embodiment in which the electric seat specified in the above (1) is installed on a vehicle, and is used, for example, in a driver's seat. According to the present embodiment, the operations and effects described in the above section (1) are similarly obtained on the vehicle. (5) An electric drive mechanism A for driving the sheets (1 to 3) in the front-rear direction as viewed from the occupant; front-rear position detection means (A2, A3, 6a, 9a, 10); an electric drive mechanism B for vertically driving the headrest (3) of the sheet; a headrest position detecting means (B2, B3, 6b, 9b) for detecting the vertical position (RPB) of the headrest. An electric drive mechanism E for rotating the seat back (2) of the sheet in the front-rear direction; detecting a seat back angle for detecting a rotation angle (RPE) of the seat back (2); Means (E, Ed, 10); means (SB, SC) for inputting a drive instruction; and controlling at least one of the electric drive mechanisms A, B, and E in response to the drive instruction from the input means. Headrest automatic adjustment for driving the headrest (3) via the electric drive mechanism B to the vertical position (PBo) corresponding to the directional sheet position (RPA) (57-6 in FIG. 7)
And 3) performing control of the electric seat provided with control means (10, 9a, 9b): the rotation angle (RPE) of the seat back (2) is controlled by the seat.
In the case of indicating a rearward inclination larger than the inclination setting value (PEref) of the headrest, the means for inhibiting the headrest automatic adjustment (CPU 10; 55 of FIG. 6-ArP of FIG. 7).
~ 63 bypass).

If the headrest is raised (projected) by the automatic adjustment of the headrest when the seatback is slid backward in a posture in which the seatback (2) is greatly inclined backward, a child seat of the rear seat is provided. And may interfere with luggage. In the present embodiment, the headrest automatic adjustment is prohibited in a posture in which the seat back (2) is greatly inclined backward, so that such a problem is solved. (6) An electric drive mechanism A for driving the sheets (1 to 3) in the front-rear direction as viewed from the seated person; front-rear position detection means (A2, A3, 6a, 9a, 10); an electric drive mechanism B for vertically driving the headrest (3) of the sheet; a headrest position detecting means (B2, B3, 6b, 9b) for detecting the vertical position (RPB) of the headrest. Means for inputting a driving instruction (SB, SC); and controlling at least one of the electric driving mechanisms A and B in response to the driving instruction from the input means, to set a seat position in the front-rear direction ( RPA), the headrest (3) is automatically adjusted by driving the headrest (3) to the vertical position (PBo) associated with the headrest (3) via the electric drive mechanism B (FIG. 7).
57 to 63), the control means (10, 9a, 9b);
Means for designating prohibition (SE);
a, 9b) execute the headrest automatic adjustment when permission is specified by the specifying means (SE) (SE on).
(50-51-55-56-57 in FIG. 6), when the prohibition is specified (SE off), the execution of the headrest automatic adjustment is suspended (57 to 50 in FIG. 6 to ArP in FIG. 7). 63 bypass);

The user can select whether or not the headrest can be automatically adjusted by the specifying means (SE). For example, a user who has a high suitability for the relationship between the seat front-back position and the headrest height, that is, the standard characteristic, which is set for the headrest automatic adjustment, specifies that the headrest automatic adjustment is possible by the specifying means (SE). , You can take advantage of that advantage. A user having low compatibility with the standard characteristics can designate the headrest automatic adjustment prohibition by the designating means (SE) to avoid unintended automatic driving of the headrest.

Further, in a usage mode in which the number of seated persons is limited to a few specific persons, and the corresponding sheet optimal posture is registered in the memory, the seat optimal posture for each person is registered. The automatic adjustment of the headrest is practically unnecessary. In this case, by specifying the prohibition of the automatic adjustment of the headrest by the designation means (SE), the unnecessary automatic movement of the headrest can be avoided. When setting and registering a seat posture suitable for a new user, or when updating the registered posture, specify the headrest automatic adjustment possible with the designating means (SE) and adjust the seat posture. Designation means when the front and rear position adjustment is completed
It is preferable to specify the headrest automatic adjustment prohibition in (SE). (7) An electric drive mechanism A for driving the sheets (1 to 3) in the front-back direction as viewed from the occupant; front-back position detection means (A2, A3, 6a, 9a, 10); an electric drive mechanism B for vertically driving the headrest (3) of the sheet; a headrest position detecting means (B2, B3, 6b, 9b) for detecting the vertical position (RPB) of the headrest. Means for inputting a driving instruction (SB, SC); and controlling at least one of the electric driving mechanisms A and B in response to the driving instruction from the input means, to set a seat position in the front-rear direction ( RPA), the headrest (3) is automatically adjusted by driving the headrest (3) to the vertical position (PBo) associated with the headrest (3) via the electric drive mechanism B (FIG. 7).
57 to 63), the electric sheet including control means (10, 9a, 9b); and a seating sensor (SG) for detecting whether or not a seated person is present on the seat cushion (1). The control means (10, 9a, 9b) executes the headrest automatic adjustment when the seating sensor (SG) detects a seated person (56 in FIGS. 6 and 7).
When the occupant is not detected, the headrest automatic adjustment is suspended (57 in FIG. 6 to 57 to 63 by ArP in FIG. 7).
By-pass);

For example, the electric seat is used for a front seat sheet of a passenger car, and a front seat without an occupant is used to assist loading / unloading of a load on a rear seat or getting on / off of a person.
When the electric seat of this embodiment is driven forward, the headrest does not move because the headrest automatic adjustment is not performed. That is, there is no useless movement. The same applies when the vehicle is driven rearward without a seated person in order to return the front seat to the original position. (8) An electric drive mechanism (A / B) for driving a member (1/3) for supporting a seated person; a pulse generator (A2 / B2) connected to the electric drive mechanism for generating a member movement synchronization pulse; Position detecting means (10, A2, A3, 6a, 9a / 9) including data processing means (10, 9a / 9b) for counting and updating member position data (RPA / RPB)
B2, B3, 6b, 9b); non-volatile memory means (17) for holding member position data even when power is off; means for inputting drive instructions (SB, SC); Immediately after the switching, the member position data (EPA / EP
B) to read the data to be processed by the data processing means (RPA / RP
B) (4, IVD A / IVD A in FIG. 3), the electric drive mechanism (A / B) is driven in response to the drive instruction from the input means, and the member position data updated by the data processing means is set. Data (RPA / RPB) in the non-volatile memory means (17) (45 in FIG. 5, 76 in FIG. 7)
(10, 9a / 9b); In the electric sheet comprising: (10, 9a / 9b), the control means (10, 9a / 9b) outputs information (ERA = 0 / ERB = 0) indicating that the electric driving mechanism is being driven at the start of driving. At the end, the information indicating that the operation is stopped (ERA = 1 / ERB = 1) is written into the nonvolatile memory means (17) (36, 47 in FIG. 5/68, 76 in FIG. 7), and the power is switched from off to on. Immediately after that, the information is read from the non-volatile memory means (4 in FIG. 3) indicating that it is being driven (ERA = 0 / ERB = 0)
In the case of, the processing corresponding to the member position data error (FIG.
7A, 8A / 7B, 8B and the bypass of 57-63 by the ArP of FIG. 6-49 of FIG. 6, that is, prohibition or suspension of headrest automatic adjustment. And the position register according to 9A to 12A / 9B to 12B in FIG.
(Setting of temporary position data to RPA / RPB);

According to this, when the power returns to the normal state after the power is turned off, the information (ERA / ERB) is read out from the nonvolatile memory means (17), whereby the nonvolatile memory means (17) is read. It is possible to judge whether the member position data (EPA / EPB) is an error (low reliability) or not (high reliability). The member position data of the non-volatile memory means (17) when the electric drive mechanism is being driven when the power was last turned off and when the power is turned on this time.
When (EPA / EPB) is likely to be an error (ERA = 0 / ERB = 0), the control means (10, 9a / 9b) outputs the member position data error.
A corresponding process can be performed to ensure the reliability of the electric drive. (9) In the above (4), the prohibiting means (CPU 10) releases the prohibition of the automatic adjustment of the headrest (FHB = 0) when the means for detecting the opening and closing of the door (SF) is switched to a state indicating the opening of the door.
(92-96 in FIG. 10).

When the door is opened, there is a possibility that the occupant will be replaced. If there is a change and a new occupant drives the seat back and forth, according to this embodiment, the headrest automatic adjustment prohibition is released when the door is opened, so that the seat back and forth movement is linked. The headrest moves to the position (PBo) corresponding to the front and rear position of the seat. New occupants can take advantage of the automatic headrest adjustment. (10) In the above (5), the prohibiting means (CPU 10) is adapted to operate when the rotation angle (RPE) of the seatback (2) becomes smaller than the seatback inclination set value (PRref). Execute the headrest automatic adjustment (101-103-104- of FIG. 10)
FIG. 6, 57).

According to this, the headrest is automatically adjusted at the angle where the seatback (2) stands up and there is no possibility of interference, and the height of the headrest corresponding to the seat front / back position at that time is adjusted. Automatically driven to PBs). (11) In the above (6), the control means (10, 9a, 9b) stops the automatic adjustment of the headrest when the designation by the designation means (SE) is switched from permission to prohibition (50 in FIG. 6).
-57-63 bypass by ArP, Fig. 7).

The user operates the input means (SB, SC) to enter the
When the headrest is automatically adjusted during head-to-back driving, the headrest moves unexpectedly, and the user switches the designation means (SE) to the headrest automatic adjustment prohibition to cancel this headrest automatic adjustment. Automatic movement stops. (12) In the above (6), the control means (10, 9a, 9b) executes headrest automatic adjustment when the designation by the designation means (SE) is switched from prohibition to permission (see FIG. 10).
97-99-100-57 in Figure 7).

When the user switches the designation means (SE) from the headrest automatic adjustment prohibition to the permission, the headrest height (RPB) deviates from the height (PBo) corresponding to the sheet front-back position (RPA). The front and back of the seat at that time
It is automatically driven to the height (PBo) corresponding to (RPA). (13) In the above (7), the control means (10, 9a, 9b) executes the automatic adjustment of the headrest when the detection of the sitting sensor (SG) is switched from no occupant to present (FIG. 10).
105-107-108-57 in FIG. 7).

When the headrest height (RPB) deviates from the height (PBo) corresponding to the seat front-rear position (RPA) when there is a change from no occupant to the seat, the headrest is moved to the current seat position. It is automatically driven to the height (PBo) corresponding to the front and rear position (RPA). (14) An electric drive mechanism A for driving the sheet (1) in the front-back direction as viewed from the occupant; a pulse generator (A2) connected thereto for generating a sheet movement synchronization pulse; Position detecting means (10, A2, A3, 6a, 9a) including data processing means (10, 9a) for updating the sheet position data (RPA); 3) an electric drive mechanism B for vertically driving the headrest; headrest position detecting means (10, B2, B3, 6b, 9b) for detecting a vertical position of the headrest; means (SB, SC) for inputting a drive instruction; Immediately after the power is switched from off to on, the sheet position data of the nonvolatile memory means (17) is read.
Read out the data (EPA), set the data to be processed (RPA) by the data processing means (10, 9a), drive the electric drive mechanism (A) in response to the drive instruction from the input means, Automatic adjustment of the headrest (57 to 63 in FIGS. 6 and 7) for driving the headrest via the electric drive mechanism B is performed at the vertical position corresponding to the sheet position (RPA) in the front-rear direction. Processing means (10, 9
a) a control sheet (10, 9a, 9b) for writing the updated sheet position data (RPA) to the non-volatile memory means (17); 9a, 9b) is information (ERA = 0) indicating that the electric drive mechanism A is being driven at the start of driving,
At the end of the operation, the information indicating stop (ERA = 1) is written to the non-volatile memory means (1), and the information is read out from the non-volatile memory means (17) immediately after the power is switched from off to on and driven. In the case of indicating the inside (ERA = 0), the headrest automatic adjustment (57 to 63 in FIGS. 6 and 7) is prohibited (7A in FIG. 3,
6. An electric sheet characterized by setting (49 of FIG. 6-57-63 bypass by ArP of FIG. 7).

According to this, the sheet position data generated based on the memory data having a possibility of a data error is generated.
The automatic adjustment of the headrest, which may deviate from an appropriate position, based on the data, is prohibited, so that the error of the automatic adjustment of the headrest is prevented. (15) The position detecting means (10, A2, A3, 6a, 9a) is a sheet (1)
Includes means (A3, 6a) for detecting that the vehicle has reached the specific position (PAmin, PAref, PAmax), and the data processing means (10, 9a) responds to the detection to detect the sheet position data. The data (RPA) is updated to the data (PAmin, PAref, PAmax) determined at the specific position.

As a result, even when the reliability of the sheet position data (RPA) is low, the reliability of the sheet position data is high since the detection of the arrival at the specific position. The reliability and stability of the mechanism drive control are improved. (16) When the seat position data (RPA) is updated in response to the specific position arrival detection, the control means (10, 9a, 9b) releases the prohibition of the automatic adjustment of the headrest (FIG. 5). 34,35; 40-42
Set FIA = 0, and execute steps 57 to 63 from 49 to 50-51-55-56 in FIG. 6).

As a result, highly reliable sheet position data can be obtained.
Automatic adjustment of headrest based on data (RPA) becomes possible. (17) The control means (10, 9a, 9b), via the electric drive mechanism B, moves to a vertical position corresponding to the seat position in the front-rear direction when the headrest automatic adjustment is switched from prohibition to cancellation. Drive the headrest (from 109 in FIG. 10 to 5 in FIGS.
7-63).

As a result, highly reliable sheet position data can be obtained.
Automatic adjustment of headrest based on data (RPA) is realized.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0035]

FIG. 1 shows an outline of the mechanism of an embodiment of the present invention. The electric seat shown in FIG. 1 is a driver seat, which includes a seat cushion 1 (seating portion), a seat back 2 and a headrest 3, and is a well-known electric drive mechanism A. It is movably supported on the vehicle floor via a (slide adjustment mechanism) in the direction in which the front-rear axis of the vehicle extends (hereinafter, the front-rear direction). Sheet cushion 1
The front and rear of the motorized drive mechanism C and D
, Respectively, whereby the height of the seat cushion 1 and the inclination in the front-rear direction are adjusted.

The seat back 2 includes a well-known electric drive mechanism E.
(Reclining mechanism) is coupled to the seat cushion 1 so as to be tiltable in the front-rear direction. Headrest 3
Is mounted on the upper part of the seat back 2 by a well-known electric drive mechanism B.
It is supported movably in the vertical direction (correctly, the direction in which it comes into contact with and separates from the tip of the seatback 2) via a (elevating mechanism). The seat back 2 further includes a lumbar support that projects / retreats from a seated person by rotating about a horizontal axis. Evacuation) drive.

FIG. 2 shows the configuration of electric elements incorporated in the above-mentioned electric drive mechanisms A to F, and a sheet ECU (electronic control device for sheet attitude control) for driving each mechanism. An electric motor A1, which is a prime mover of an electric drive mechanism A for driving the sheet in the front-rear direction, is connected to a reverse rotation circuit 4a and a normal rotation circuit 5a, and the reverse rotation circuit 4a is connected to a motor controller 9a.
When "a" instructs reverse rotation (drive backward), the electric motor A1 is energized for reverse rotation, whereby the electric motor A1 rotates reversely, and the sheet moves forward (frontward). . When the motor controller 9a instructs the normal rotation (drive forward), the normal rotation circuit 5a energizes the electric motor A1 for the normal rotation, whereby the electric motor A1 rotates forward and the electric motor A1 rotates forward. -Moves in the rear direction (rear direction). In either case, the current flows to the overload detection resistor ra, and the overload detector 6a monitors the voltage drop (current value) of the resistor ra.
When it reaches a high value (a value equal to or higher than the reference value for overload detection) corresponding to reaching the movement limit position of the mechanism, an overload signal (a signal indicating overload) is generated and a motor controller is generated. Give to 9a.

A rotary encoder A2 is connected to the rotating shaft of the electric motor A1. The rotary encoder A1 generates one pulse of a movement synchronizing pulse for a predetermined small angle rotation of the electric motor A1. , A pulse processing circuit 7a amplifies and shapes this pulse and supplies it to a motor controller 9a. Front limit position PA of sheet driving range (moving area) of electric drive mechanism A
From the center to the reference point PAref in the middle of the rear limit position PAmax, the switch is turned on (switch contact) while the sheet is in the first half range from the front side to the reference point PAref, and the reference point PAref and the rear half thereof thereafter. While in the range, a switch A3 and a switch operation cam (not shown) for detecting the front and rear position of the sheet, which are kept off (switch open), are provided in the electric drive mechanism A, and a detection circuit 8a connected to the switch A3 is provided. , The switch A
A detection signal indicating ON / OFF of the signal 3 is supplied to the motor controller 9a.

The power switch SPS for the electric seat is connected to the on-board battery BAT, and the power switch SPS
Is closed (on), and furthermore, while the self-holding relay -PRY is on, the power supply circuit PSC applies all of the required operating voltages to the respective parts of the electric circuit shown in FIG.
Even if S is on, while the self-hold relay PRY is off, the power supply circuit PSC keeps the CPU 10, ROM 11, RA
M12 and EEPROM 17, and CPU 10
Input switches SA to SE and detection switch S
An interface portion necessary for recognizing the state change of F and SG is always supplied with a minute electric power required for holding position data and detecting an input.

Here, the state where all the electric circuits in the seat ECU shown in FIG. 2 are cut off from the power supply when the power switch SPS is off or the on-board battery BAT is not connected is referred to as a "power supply off state." The state where only a small amount of the above-described electric power is partially supplied is referred to as a “standby state”, and the state where a required operating voltage is applied to all of the electric circuits is referred to as an “active state”. Is a non-volatile memory, so that the data written therein is retained (saved) even in the "power-off state", but the CPU 10 and the RAM 12 cannot retain the data. In the “power-off state”, only the EEPROM 17 holds position data of the electric drive mechanisms A to F driven.

A power switch SPS is connected to the on-board battery BAT.
Is connected and the power switch SPS is turned on, the power supply circuit PSC starts supplying a small amount of power, and the seat ECU enters a "standby state".
When entering the CPU, the CPU 10
Is turned on, the power supply circuit PSC applies a required operating voltage to all of the electric circuits to make the seat ECU "active", and checks the state of each part via the I / O port 16. If each part is normal, the stored data is read out from the EEPROM 17 and the position register RP addressed to each mechanism is read.
Position data is set in A to RPF. The contents of this processing will be described later in detail with reference to FIG.

When the state where there is no switch input or the state change of the detection switch continues for the set time Tw from the "active state", the CPU 10 turns off the self-holding relay PRY and sets the seat ECU to the "standby state". ". Thereby, the power of the mechanisms A to F and the mechanism driving devices Ad to Fd is turned off. If there is a switch input or a change in the state of the detection switch in the "standby state", the CPU 10 turns on the self-holding relay -PRY to set it to the "active state" (power on to Ad to Fd) to respond to the input or state change. Execute the executed processing. That is, an input or a state change is encoded to generate a command for the mechanism driving devices Ad to Fd and to give them. The contents of this processing are also described with reference to FIG.
Details will be described later.

Motor controller 9 of mechanism driving device Ad
a, while executing the command and driving the electric motor A1, every time the rotary encoder A2 generates one pulse, the front and rear position registers assigned to the internal memory of the controller 9a are allocated. The position data is updated by incrementing or decrementing the position data, and the switch A3 is turned on / off.
When there is an OFF switch, the position data is updated to PAref indicating the reference point position. When the overload detection circuit 6a detects an overload, the motor drive is stopped and the motor is being driven forward. If it is, PAmin indicating the front limit position is written in the front / rear position register, and if driving backward, PAmax indicating the rear limit position is written in the front / rear position register, and the position data is held. In the "state" as well as in the "standby state", the controller 9a is powered off and cannot hold position data by itself. Therefore, during the operation of each of the mechanisms A to F, the CPU 10 similarly updates and holds the above-mentioned position data, and holds the "standby state".
Immediately after switching to the "active state", the CPU 10 determines whether the position data RPA-R addressed to each of the mechanisms A-F held by the CPU 10 is held.
The PF is transferred to each of the mechanism driving devices Ad to Fd.

The mechanism driving devices Ad to Fd have the same hardware configuration and the same functions. However, data to be set in accordance with the individual characteristics of the mechanisms A to F, such as set values and constants.
The parameters are individually defined.

Various input switches S are provided on the operation display panel.
A to SE and a light emitting diode LD serving as an indicator light are provided. The CPU 10 reads a change in the state of an input switch, that is, a driver (user) input through a panel I / F 14. The CPU 10 also reads the state of the seat sensor SG and the driver door open / close detection switch SF provided on the seat cushion 1 via the external I / F 15. Table 1 below shows codes and functions assigned to the input switches and the detection switches shown in FIG.

[0046]

[Table 1]

A switch group SA consisting of three switches SA1 to 3 is an open / close switch for sheet user identification, and presses one of them, i.e., SAi (i = 1, 2, or 3). And it is closed and the other two are mechanically forced open. Pressing the already closed switch again switches it to open, opening the previous switch. For the seat ECU, the switches SA1 to SA3 are used to control the sheet posture data (front-back position data RPA, headrest up-down position data RP).
B, cushion front vertical position data RPC, cushion rear vertical position data RPD, seatback tilt data R
PE and lumber support rotation position data RP
F, ie, a set of position data)
In the case of registering in (EEPROM 17 of) and reading from it, the address or name of the data table of the access destination is designated.

As shown in Table 1, the momentary switch SB which is turned on only while being pressed by a finger is provided for each of the mechanisms A to F.
A total of twelve forward and backward drive instruction switches for manual driving assigned to each pair. A switch for instructing driving, SBAr, is a switch for instructing driving in the backward direction. The switch is turned on while being pressed by a finger, and instructs driving. SBBu and S
BBd is for instructing the upper drive of the headrest 2 and for instructing the lower drive. SBCu and SBCd are used for an upper drive instruction and a lower drive instruction for the front portion of the seat cushion 2.
SBDu and SBDd are used for an upper drive instruction and a lower drive instruction at the rear of the seat cushion 2. SBEf and SB
Er is for instructing the seat back 2 to rotate forward and to instruct the seat back 2 to rotate backward. SBFf and SB
Fr is used to instruct the lumbar support to rotate forward (to project toward the occupant) and to rotate backward.

The automatic attitude setting switch SC has a memory (E
It reads out the sheet posture data registered in the EPROM 17) or the standard posture data in the ROM 11, and instructs to determine the sheet in the posture. When this switch SC is turned on, if any one of SA1 to SA3 is on at that time, the attitude data addressed to the switch SAi is stored in the attitude data table i of the EEPROM 17 (of the memory). Area). SA1
When all of .about.SA3 are off, the standard attitude data written in the standard attitude data table (one area of the memory) of the ROM 11 is read.

The attitude registration switch SD is connected to the EEPROM 1
7 to register the sheet posture data. When this switch SD is turned on, S
If any one of A1 to SA3 is on, EEP
In the attitude data table i addressed to the switch SAi on the ROM 17, the sheet attitude data (R
PA to RPF). When all of SA1 to SA3 are off, this writing is not performed.

The headrest interlocking permission switch SE is an open / close switch. When the switch is closed (on), the headrest height is moved to an appropriate position corresponding to the position RPA in response to a change in the front-back position RPA of the sheet. A headrest automatic adjustment mode to be automatically adjusted is designated (permitted), and opening (off) of the switch SE cancels (prohibits) the headrest automatic adjustment mode.

The door opening / closing detection switch SF detects the opening / closing of a driver's door, and closing (on) the switch SF means opening the door and opening (off) means closing the door.
Driver seat (sheet cushion 1) seating sensor S
G detects whether there is a seated person in the driver's seat,
ON (closed) of the seat sensor SG means that there is a seated person, and OFF (open) means that there is no seat. The operation display panel has nine light emitting diodes LD. The breakdown is shown in Table 2 below.

[0053]

[Table 2]

The light emitting diodes LD1 to LD3 are turned on when the switches SA1 to SA3 are turned on, respectively, and the attitude data tables 1 to 3 on the EEPROM 17 are provided.
Means which is specified. Light emitting diode L
DA to LDF are assigned to each of the mechanisms A to F. When the position data of the assigned position register corresponding to the mechanism is not a detected value, when the mechanism is being driven, and Lights when the load detection and the position data in the position register are dissociated (mechanism abnormality is considered).

FIG. 11 (a) shows the longitudinal driving range and longitudinal position data of the sheet by the mechanism A on the horizontal axis, and the vertical movement range and vertical position data of the headrest by the mechanism B on the vertical axis. Thus, an area division defined by ON / OFF of the position detection switches A3 and B3 is shown. The combination of the switch A3 of the mechanism A and a switch operation cam (not shown) makes the switch A3
Means that the sheet front-back position RPA is equal to the reference point PAref (130 m
m), the front limit position (PAmin =
0 mm), and off during the reference point PAref and the rear limit position (PAmax = 240 mm), which is the end point of the movement area. By the combination of the switch B3 of the mechanism B and a switch operation cam (not shown), the switch B3 moves the headrest vertical position RPB to the reference point PBref (35 m).
m), it turns on during the lower limit position (PBmin = 0 mm), which is the base point, and turns off during the reference point PBref and the upper limit position (PBmax = 72 mm), which is the end point. That is, the reference point (P) at which the position detection switches A3 and B3 are switched.
The point IPb at Aref = 130 mm and PBref = 35 mm corresponds to each moving area (PAmin = 0 mm to PAmax = 240 mm, PBmi).
n = 0 mm to PBmax = 72 mm; midpoints are 120 mm and 36 m
m) (PAref = 130 mm, PBref 35 mm).

Each of the other mechanisms C to F also has one similar position detection switch (C3 to F3: not shown) and a switch operation cam (not shown).
One point PCref, PDref, PEref, in the middle of each moving area
The switch is turned on / off by PFref.

The thick left-down diagonal line in FIG. 11 indicates the headrest target position corresponding to the sheet front-back position when the vertical position of the headrest is automatically adjusted in conjunction with the sheet front-back position.
When the automatic adjustment mode is designated, the headrest is automatically driven to the hatched position as the sheet moves back and forth.

FIGS. 3 to 10 show an outline of the control operation of the CPU 10 shown in FIG. First, please refer to FIG. When the power switch SPS of the electric seat is connected to the on-board battery BAT and the power switch SPS is turned on (closed),
The power supply circuit PSC supplies a small amount of electric power to a standby monitoring element such as the CPU 10, and the sheet ECU enters a "standby state". The CPU 10 turns on the power (supplies a minute power).
In response to this, the internal registers, counters, timers and the like are set to the standby state, and the input / output ports are set to the signal levels during the standby state (step 1). In the following, in the parentheses, the word “step” is omitted, and step N
o. Write only numbers and symbols.

At this point, the CPU 10 determines that each of the mechanisms A to
F position data is not held. Next, the CPU 10
Turn on the self-hold relay PRY and start the timer Tw.
(2, 3). When the relay PRY is turned on, the power supply circuit PSC applies an operating voltage to the mechanism driving devices Ad to Fd, and the seat ECU is brought into an "active state". As a result, the motor controllers 9a, 9b,.
Performs initialization of its power-on response, and C
It is in a command waiting state waiting for a command from the PU 10, and the state of the position detection switches A3, B3,... Can be read. The CPU 10 also includes an I / O 16 and each mode.
The status of the position detection switches A3, B3,... Can be known via the ta controllers 9a, 9b,. However, at this time, the motor controllers 9a, 9
.. do not hold the current position data,
PU10 and motor controllers 9a, 9b, ...
Neither of them knows the current positions of the mechanisms A to F (a set of positions A to F is referred to as a sheet posture). Here, the CPU 10 reads the control data ERA to ERF from the EEPROM 17.
And the mechanism position data EPA to EPF are read (4).
The contents of these data are as follows: ERA: Immediately before the last power-off, motor A of mechanism A (
1 bit indicating whether 1) is being driven or stopped. Driving = “0” / Stopping = “1”, ERB: Same as ERA.
“0” / stopped = “1”, ERC: Same as ERA, and for mechanism C, driving =
“0” / stopped = “1”, ERD: Same as ERA, and driving mechanism =
“0” / stopping = “1”, ERE: Same as ERA, and driving mechanism =
“0” / stopped state = “1”, ERF: same as ERA, and driving mechanism =
“0” / stopped = “1”, EPA: The last written data before the previous power-off
Front / back position data RPA, EPB: Same as EPA, headrest vertical position data RPB, EPC: Same as EPA, vertical position data RPC at the front of the seat cushion, EPD: Same as EPA , Vertical position data RPD, EPE at the rear of the seat cushion: similar to EPA, inclination angle data of the seat back
Data RPE, EPF: Projection position data RPF of lumbar support, similar to EPA.

When data is not written to the EEPROM 17 (and when the memory is cleared), the control data ERA to ERF are all "0". 1. Determination of Sheet Posture Initial Value Immediately After Turning ON Power Switch SPS (IVD AF) 1A. Determination of initial value of sheet front-back position RPA (IVD
A) Here, the CPU 10 checks the control data ERA addressed to the mechanism A (5A), and if it is "1", the EEP
Position data EPA read from ROM 17 and addressed to mechanism A
Is likely to correctly represent the front and back position of the sheet when the power was last turned off (the current position is the same) (high reliability)
Therefore, the sheet front-back position register RPA addressed to the mechanism A, which is allocated to the internal memory or the RAM 12 of the CPU 10,
The EPA is written (6A), and the data RPA of the position register RPA is transferred to the motor controller 9 of the driving device Ad of the mechanism A.
(13A). The motor controller 9a is
The received position data RPA is written to a position register assigned to its internal memory. However, the control data ERA
Is "0", it is considered that the reliability of the position data EPA correctly representing the current sheet position is low, that is, the possibility of a data error is high.
"1" (setting of the position data based on the detected value is not completed) is written into the register FIA (7A), and the light emitting diode LD
A is turned on (8A), and status information is requested from (the motor controller 9a of) the mechanism driving device Ad, and is read by itself (9A). Here, the state signal of the position detection switch A3 in the read state information is extracted, and the position register R
Predetermined position data is written as temporary data in PA.
That is, when the position detection switch A3 is off (the area A or B shown in FIG. 11A), PAmax = 240 mm is written in the position register RPA. Switch A
3 is ON (area B or C), PAref = 130 mm is written to the position register RPA (10A to 12A).
A).

1B. Determination of Initial Value of Headrest Vertical Position RPB (IVD B) Here, similarly to the above processing (IVD A), if the control data ERB is “1”, the headrest vertical position register RPB addressed to mechanism B Write EPB to (6
B), the data RPB of the position register RPB is transferred to the motor controller 9b of the driving device Bd of the mechanism B (13).
B). The motor controller 9b writes the received position data RPB into a position register assigned to its internal memory. However, if the control data ERB is "0", "1" is written into the register FIB (7B), and the light emitting diode
The drive LDB is turned on (8B), the status information is requested from the mechanism driving device Bd, and the status information is read by itself (9B). Here, the state signal of the position detection switch B3 in the read state information is extracted, and is temporarily stored in the position register RPB.
Write predetermined position data. That is, the position detection switch B3 is turned off (the area A or B shown in FIG. 11A).
, PBref = 35 mm in the position register RPB.
When the switch B3 is ON (area C or D), PBmin = 0 mm is written into the position register RPB (10B to 12B).

Determination of other initial values for setting the respective initial values in the position registers RPC to RPF addressed to the other mechanisms C to F, respectively. The contents of the IVDs CF to F are the same as those of the above-mentioned IVDs A and B. It is. 2. Automatic adjustment of headrest (HRA) immediately after power switch SPS is turned on Referring to FIG. The CPU 10 then proceeds to register FIA,
The FIB data is checked (15), and if at least one of them is "1" (position data setting based on the detected value is incomplete), the sheet front-back position data RPA is obtained. Or, because the headrest vertical position data RPB is incorrect,
The headrest is temporarily set at a high position where the reliability of the occupant protection is high (16 to 18). That is, the inclination angle data RPE of the seat back 2 with respect to the seat cushion 1 is read from the position register RPE, and it is checked whether or not it is equal to or smaller than the reference angle (reference point) PEref (16). The minimum value of the angle value represented by the angle data RPE (PEmin = 0
°) means that the seat back 2 reaches the front limit position and the seat back 2 is at an angle of approximately 60 degrees with respect to the seat cushion 1 (60 degrees with respect to the floor of the vehicle). The seatback 2 is parallel (horizontal) to the floor of the vehicle at the maximum forward angle (PEmax = 120 °) represented by the angle data RPE. Reference angle (reference point) PEre
f = 50 ° (110 ° with respect to the floor of the vehicle).

In step 16, if the position (inclination angle) data RPE of the seat back 2 is equal to or less than PEref, that is, the angle of the seat back 2 with respect to the vehicle floor is 1
If the angle is not more than 10 °, the seat back 2 is substantially upright, and there is no problem in raising the headrest 3, that is, pushing the headrest 3 out. In this case, the CPU 10
Data (here, PAref = 130 mm or PAmax =
Headrest target position (height) P corresponding to 240mm)
Bs (PBref = 35mm corresponding to PAref = 130mm or P
(PBmax = 72 mm corresponding to Amax = 240 mm) is calculated (17), and the controller 9b is instructed to drive the headrest to PBs (18). That is, the controller 9
b is given PBs as a headrest drive target position,
Instructs driving to the target position. The controller 9b controls the target position PBs (= PBref or PBmax) and the controller 9b.
The electric motor B1 is driven in a direction in which the position RPB of the headrest 2 coincides with the target position PBs by comparing the data RPB of the position register RPB (RPB = PBref at this time) inside the head 9b. I do. The CPU 10 monitors the output signals of the overload detection circuit 6b, the pulse processing circuit 7b, and the position detection circuit 8b until the controller 9b notifies the completion of driving to the target position PBs.

For example, when the power switch SPS is connected to the vehicle battery BAT and the power switch SPS is switched from off to on, the control data ERA, ERB
Assume that both are "0" (the position data EPA and EPB have low reliability). In this case, when the front-back position RPA of the sheet is the area A or D on FIG. 11A, the position data RPA = PAmax (240 m
m), the target position PBs is calculated as PBs = PBmax (72 mm). In this case, when the headrest 3 is within the area A (for example, the point a0 shown in FIG. 11B), since the position data RPB = PBref (35 mm), the controller 9b sets the PBmax. (72mm) -PBref
(35 mm), the headrest 3 is driven upward. Since the actual position of the headrest 3 before this driving is equal to or larger than PBref (35 mm), PBmax
The headrest 3 reaches the upper limit position PBmax (72 mm) by the time the drive for (72 mm) -PBref (35 mm) is completed or when the drive for the drive is completed, and the output signal of the overload detection circuit 6a. Switches from the level indicating no overload to the level indicating overload. Controller 9b stops driving of electric motor B1 in response to this switching. Controller 9b and CPU 10 rewrite the position data of each position register RPB to PBmax in response to the overload. And the CPU 10
The register FIB is cleared, and the light emitting diode LDB is turned off. As described above, the headrest 3 is, for example, shown in FIG.
The point moves from the point a0 shown in FIG. That is, by setting the initial position of the power-on response, the headrest 3 located in the area A is set to the upper limit position PBmax of the area.

When the power switch SPS is turned on from off, the seat position and the headrest position are within the area D (for example, the point d0 shown in FIG. 11B), and the target position PBs = When PBmax (72 mm) is calculated, headrest position data RPB = PBmin (0 m
m), the controller 9b is set to PBmax (72 mm).
-Drive the headrest 3 upward, assuming that driving for PBmin (0 mm) is necessary. Since the actual position of the headrest 3 before this driving is equal to or more than PBmin (0 mm), PBma
By the time drive of x (72 mm) -PBmin (0 mm) is completed, first, the position detection switch B3 is switched from on to off. At that time, the headrest 3 is moved to the position RBre of the reference point.
f. Controller 9b and CPU 10 rewrite the position data of each position register RPB to PBref in response to this switching. And CPU10
Clears the register FIB and sets the light emitting diode LD
B is turned off. Here, the target position is PBmax (72 mm),
Since the current position RPB is PBref (35 mm), the controller 9b continues to drive the headrest 3 upward, and each time the pulse processing circuit 7b outputs the movement synchronization pulse, the controller 9b and the CPU 10 execute the interrupt processing. Position data
The position data RPB of the register RPB is updated to the minimum unit. That is, the position data RPB is updated as the headrest moves. Then, the position data RPB is PBma.
x (72 mm), or when the output of the overload detection circuit 6a is switched to one indicating overload.
The drive 9b stops driving the headrest 3. As described above, the headrest 3 moves from the point d0 shown in FIG. 11B to the upper limit position PBmax via the point d1. That is, by setting the initial position of the power-on response, the headrest 3 located in the area D lower than the appropriate position (thick solid line) corresponding to the sheet front-back position RPA is set to the upper limit position PBmax. In other words, when a rear-end collision occurs, the vehicle is automatically set to a position where there is a high possibility of protecting the occupant.

When the power switch SPS is switched from off to on and the front-back position RPA of the sheet is in the area B or C on FIG.
Since RPA = PAref (130 mm), the target position P
Bs = PBref (35 mm) is calculated. In this case, when the headrest 3 is within the area B (for example, the point b0 shown in FIG. 11C), the position data RPB = P
Because of Bref (35 mm), the controller 9b does not drive the headrest 3. The fact that the headrest 3 is in the area B means that the headrest 3 is located at a position equal to or higher than the headrest proper position PBs corresponding to the front-rear position RPD of the sheet, that is, a position where there is a high possibility of protecting the occupant in the event of a collision. Means that. It is highly likely that the driver when the power is turned on this time is the same as the driver when the power was turned off last time, and the seat position (headrest position) is likely to be the same. , It is desirable not to drive the headrest.

If the seat position and the headrest position are within the area C (for example, point c0 shown in FIG. 11C) and the target position PBs = PBref (35 mm) is calculated, the headrest position data -RPB = PBmin (0mm)
Therefore, the controller 9b has a PBref (35 mm)-
The headrest 3 is driven upward because it is necessary to drive by PBmin (0 mm). Since the actual position of the headrest 3 before this driving is equal to or more than PBmin (0 mm), PBref
The position detection switch B3 is switched from ON to OFF until the drive for (35 mm) -PBmin (0 mm) is completed or when the drive for the drive is completed. At that time, the headrest 3
This is the position RBref of the reference point. Controller 9b and CPU 10 rewrite the position data of each position register RPB to PBref in response to this switching.
Then, the CPU 10 clears the register FIB and turns off the light emitting diode LDB. Here, the target position PB
Since s is PBref (35 mm) and the current position RPB (data of the position register RPB) is PBref (35 mm), the controller 9b stops driving the headrest 3. Thus, the headrest 3 moves from the point c0 to the point c1 shown in FIG. 11C, for example. That is, due to the initial position setting of the power-on response, the headrest 3 located in the area D lower than the proper position RBs corresponding to the sheet front-back position RPB is set to the proper position or a reference position PBref higher than the proper position RBs.

3. Seat attitude control at regular time Referring to FIG. Each position register R addressed to each mechanism A to F
Initial values are set for PA to RPF as described above (IVD
AF), after performing the initial adjustment (HRA) of the headrest, the panel I / F 14 and the external I / F at a predetermined cycle.
The state reading (24) of the switch connected to the switch 15 is repeated, and all the switches SB are turned off, there is no state change, and when the timer Tw has timed out, the self-holding relay is executed.
PRY is turned off (19-22). As a result, the sheet ECU enters the "standby state", and the mechanism driving devices Ad to Fd
Is turned off.

However, the CPU 10 determines that the position data RPA
The RPF is held, and the state reading (19) is repeated.
When one of the switches SB is turned on or the state changes, the timer Tw is started (23),
The self-hold relay PRY is turned on (24). As a result, the sheet ECU enters an "active state". Next, the CPU 10
Transfers the position data RPA to RPB held in the position registers RPA to RPB to the motor controllers of the mechanism driving devices Ad to Fd, and transfers the position data RPA to RPB to the motor controllers 9.
, a, 9b,... represent the received position data RPA to R.
Write PB to the location register inside the controller. Next, the registers FIA to FIF (steps 7A and 7B in FIG. 3)
With reference to the data of (1), if it is 1, the corresponding light emitting diodes LDA to LDF are turned on. For example, if the data of the register FIA is 1, the light emitting diode L
DA is turned on. Referring to FIG. 5, it is checked which of the switches SA1 to SA3 is on by referring to the state data read in the "state read" (19) executed most recently (25, 27, 27). 29) Any SAi
Is turned on, the light emitting diode LDi associated therewith is turned on (26, 28, 30, 31).

3A. Slide forward control of sheet (Af
P) Please refer to FIG. Next, the CPU 10 checks whether the sheet forward instruction switch SBAf is on (32), and if it is on, executes the slide forward control (AfP). In this slide advance control (AfP), the EEPROM 17
The control data ERA is rewritten to "0" (during motor driving) (36), and the sheet is driven forward (39). Every time it occurs), C
The position data RPA of the sheet front-back position register RPA of the PU 10 and the motor controller 9a is updated (48 in FIG. 6). If the position detection switch A3 is switched from off to on during this sheet driving, the CPU 10
And the motor controller 9a rewrites the position data of each position register RPA to PAref (40, 40).
41) Clear "1" indicating that the accurate setting of the position data in the register FIA is incomplete (42), and turn off the light emitting diode LDA indicating the incompleteness (43).

Note that, by updating (48) the position data RPA in response to the generation of the movement synchronization pulse, the position register RPA is switched before the position detection switch A3 is switched from off (area A) to on (area B). Position data RPA
Is the position data RPA in response to the generation of the movement synchronization pulse.
, There is a possibility of switching from a position indicating the position in the area A to a position indicating the position in the area B. That is, the area detection by the position detection switch A3 and the position data by the up / down counting of the movement synchronization pulse
May be inconsistent with the data. Therefore, in the present embodiment, referring to FIG. 6, the position detection switch A3
Is OFF (area A), when the position data RPA indicates a position in the area B by the down-counting of the movement synchronization pulse, the position data RPA is set to the area A.
Limit value (RPref = 130 mm) (48a-48c)
-48f-48g), decrement (countdown;
The updating of the position data) is suspended (48f, 48g). If the sheet position has not reached the lower limit position (base point; PAmin = 0) (overload is not detected), the position data RP
When the value of A exceeds the lower limit position (negative value), the position data RPA is kept at the lower limit position (PAmin = 0) (4).
8d, 48e). The same applies to the slide retreat control (ArP). When the position detection switch A3 is ON (area B) during the slide retreat drive, the position data RPA is set in the area A by the up-count of the movement synchronization pulse. When the position data RPA indicates the position,
The limit (RPref-1) of the area B is kept, and the increment (count-up) is suspended. If the position data RPA exceeds the upper limit position (PAmax + 1) while the seat position does not reach the upper limit position (end point; PAmax) (overload is not detected), the position data RP
A is kept at the upper limit position (PAmax).

Referring back to FIG. Electric motor A1 is overloaded (motor current flowing through resistor ra is greater than or equal to the set value)
, The forward driving of the sheet is stopped and the data in the position register RPA is updated to the base value PAmin (= 0).
The register FIA is cleared to turn off the light emitting diode LDA (33, 34, 35-44). Also, when the sheet forward instruction switch SBAf returns from ON to OFF, the forward driving of the sheet is stopped (32-44). When the motor drive is stopped, the data RPA of the position register RPA whose data has been updated during the motor drive is transferred to the EEPRO.
Write to register EPA of M17 (45), register F
If the IA data is "0" (meaning that the data RPA is a value based on the detected value), the EEPROM 1
7 is written with control data ERA = "1" (during motor stop: data EPA of register EPA is an accurate value) (47).

If the motor A1 is being driven (step 36)
Assuming that the power switch SPS is opened at ERA = 0), this causes the sheet ECU to be in the "power off state".
10 does not execute steps 34, 35 and 44-47. Thereby, the control data ERA of the EEPROM 17 is obtained.
Remains at "0", and the position data EPA remains at the position indicating the seat position immediately before the driving of the motor A1, and does not reflect the position change due to the current motor driving. Next, when the power is turned on, steps 7A to 1 in FIG.
2A is executed. While motor A1 is stopped (step 4
7, when the power switch SPS is opened at ERA = 1), the next time the power is turned on, step 6 in FIG.
A is executed, and the position data EPA (RPA written in step 45) is set as the sheet position data RPA,
This correctly represents the current sheet position.

When the sheet forward drive is started, the position data RPA of the position register RPA at that time is stored in the register PRPA in order to monitor the drive amount and the elapsed time since then (37). ), Start timer Th
(38). The CPU 10 refers to the driving amount and the elapsed time in control related to automatic adjustment of the headrest described below.

3B. Automatic Adjustment of Headrest While the sheet is being driven in the front-rear direction, the CPU 10 checks whether the conditions for performing the headrest automatic adjustment interlocked with the forward-backward movement of the sheet are satisfied. The conditions are as follows: 1) The sheet longitudinal position data RPA and the headrest vertical position data RPB are accurate (FIA = 0 & FI).
B = 0), 2) The headrest automatic adjustment mode instruction switch SE is turned on (permitted), the inclination angle RPE of the seatback 2 is equal to or less than the reference value PRref, and the seat cushion 1 is seated (SG).
(ON), (AND: logical product), and the headrest vertical drive instruction switches SBBu and SBBd have never been turned on until the “active state” is reached (F).
EB = 0), 3) The headrest automatic adjustment mode instruction switch SE is turned on (permitted), the inclination angle RPE of the seat back 2 is equal to or less than the reference value PRref, and the seat cushion 1 is seated (SG).
ON), and (AND: logical product), the amount of front and rear driving of the seat has exceeded the set value ΔPAp. 4) The headrest automatic adjustment mode instruction switch SE is ON (permitted), and the inclination angle of the seat back 2 When the RPE is equal to or less than the reference value PRref, the seat cushion 1 is seated (SG
ON) and (AND: logical product), the time Th has elapsed from the start of the front-back driving of the seat, or 5) the headrest automatic adjustment mode instruction switch SE is ON (permitted), and the inclination angle of the seat back 2 When the RPE is equal to or less than the reference value PRref, the seat cushion 1 is seated (SG
ON) and (AND: logical product)
There is a sheet front-back drive after registration in M11, and the drive amount has become equal to or more than the set value ΔPAp or the time Th has elapsed from the start of the sheet front-back drive, and And any one of the remaining four members 2) to 5) is established.

The success or failure of the above 1) is checked in step 49 of FIG. 6 and step HCO of FIG. 2) ~
The CPU 10 has a register FHB for determining whether each condition of 5) is satisfied or not.
Clear Data "0" of the register FHB means that the headrest can be automatically adjusted (permitted), and data "1" means that the headrest cannot be automatically adjusted (prohibited). When the headrest is driven in response to turning on of the headrest vertical drive instruction switch SBBu or SBBd, the CPU 10 writes “1” (prohibited) in the register FHB (79 in FIG. 8). Also, EEP
Even when an instruction to automatically set the seat attitude to the attitude registered in the ROM 17 is issued, the CPU 10 keeps the register FH
"1" (prohibited) is written in B (87-88 in FIG. 9). This FHB = "1" (prohibited) is cleared when step 52 or 54 is established (YES) after steps 37 and 38 are executed. That is, FHB = "0" (permitted) is rewritten.

Referring now to FIG. 6 and FIG. The CPU 10 determines whether the condition 2) is satisfied or not in Steps 50 and 51 in FIG.
If the condition 2) is satisfied (headrest automatic adjustment: permission), the process proceeds to steps 50-51-55-56 and proceeds to step 57. The CPU 10 determines whether the condition 3) is satisfied or not.
Is checked in steps 50, 51, 52, 55, and 56, and if the condition is satisfied, step 50-51-5 is executed.
The process proceeds to step 57 through 2-53-55-56. Further, the CPU 10 determines whether the condition of the above 4) is satisfied or not in step 5.
Check at 0, 51, 52, 54, 55, 56, and if it is true, then go to steps 50-51-52-54.
The process proceeds to step 57 through -53-55-56. The CPU 10 determines in step 88 (FIG. 9), 37, 38, 50, 51, 52, 54, 55, 5 whether the condition (5) is satisfied or not.
Check in step 6 and if it is true, step 5
The process proceeds to step 57 through 0-51-52-54-53-55-56.

In step 57, the CPU 10 determines the position RPA of the sheet at that time (data of the position register RPA).
Headrest standard position PBs assigned to
The upper thick left-downward diagonal line) is calculated as PBs = 0.53 × RPA-33.9 (mm). Here, the unit is mm for both PBs and RPA. Then, a value obtained by adding the user's individual headrest vertical adjustment value PBa to the standard position PBs is calculated as the headrest target position PBo. When PBo <0 mm, PBo = 0 mm is updated, and when PBo> 72 mm, PBo is updated to 72 mm (59-62), which is given to the motor controller 9b of the driving device Bd to instruct driving of the headrest to the target position PBo (63). The user-specific adjustment value PBa refers to each switch SA1.
3 are the individual adjustment amounts registered in the respective attitude data tables 1 to 3 on the EEPROM 17 and are the attitude data tables corresponding to the switch SAi that is currently ON among the switches SA1 to SA3. This is the value read from i. When all the switches SA1 to SA3 are off, the adjustment value PBa is set to 0 (60).

Next, since the switch SBAf is on (the other switches are off), the CPU 10 executes another control Ar.
P, BuP, BdP,..., FrP, and through steps 81 to 98 or 81 to 106 in FIGS. 9 and 10, proceed to “read status” (19) in FIG. Continue, step 2
From 0 to 23 to 31, the slide advance control (Af
Proceed to P). In this way, while the switch SBAf remains on, the slide forward control (AfP) is substantially performed.
Only the CPU 10 executes. When the switch SBAf returns from on to off, the driving of the sheet in the forward direction is stopped (44).

3C. Slide retreat control (ArP) If the switch SBAr for instructing the sheet to be driven in the backward direction is "ON" in the "read state" (19), the CPU
Reference numeral 10 denotes "slide retreat control" (ArP), which drives the sheet backward. The content of this control is the same as the content of the aforementioned “slide forward control” (AfP), although the driving direction is reversed.

3D. Headrest Overdrive Control (BuP) If the headrest overdrive instruction switch SBBu is ON at the time of “state reading” (19), the CPU 10 proceeds to the headrest overdrive control (Bu) shown in FIGS. 7 and 8.
Perform P). This headrest drive control (Bu
In P), the control data ERB = 0 is written into the EEPROM 17 (68), and the headrest 3 is driven upward (69). With the rise of the headrest (every time a movement synchronization pulse is generated), The CPU 10 and the motor controller 9b update the position data RPB of the headrest vertical position register RPB (74). The content of the updating process of the position data is the same as that in the case of the slide forward / backward control (AfP, ArP) described above.

When the position detection switch B3 is switched from on to off during the headrest driving, the CPU 10 and the motor controller 9a rewrite the position data RPB of each position register RPB to PBref ( 7
0,71). Then, the CPU 10 clears the register FIB and turns off the light emitting diode LDB (72, 7).
3). When the electric motor B1 becomes overloaded (the motor current flowing through the resistor rb exceeds the set value), the upper drive of the headrest is stopped, the position data RPB is rewritten to the upper limit position PBmax, and the register FIB is rewritten. Clear and light emitting diode L
The DB is turned off, and the data RPB of the position register RPB is set to E.
Writing to the register EPB of the EPROM 17 (65 to 67)
-75, 76). If the data in the register FIB is "0" (meaning that the data RPB is a value based on the detected value), the control data ERB =
"1" (motor stopped: data EPB of register EPB)
Is an accurate value).
Also, when the headrest upper drive instruction switch SBBu returns from ON to OFF, the headrest upper drive is stopped (64-75).

The headrest-up driving instruction switch S
Driving the headrest (manual adjustment) when BBu returns from on to off (stops driving over the headrest)
Is written into the register FHB (79), indicating that there has been (for this reason, headrest automatic adjustment is prohibited for a while). This “1” is thereafter erased (updated to 0 indicating permission of headrest automatic adjustment) when the steps 37 and 38 shown in FIG. 6 are executed and the condition of step 52 or 54 is satisfied (YES).

3E. Headrest Lower Drive Control (BdP) If the switch SBBd for instructing the lower drive of the headrest is on at the time of “state reading” (19), the CPU 1
0 is headrest lower drive control (BdP), which drives the headrest downward. The content of this control is the reverse of the drive direction, but the above-mentioned “headrest drive control”
(BuP) is the same as the content.

3F. Upper drive control in front of the seat base (C
uP) The seat base is a cushion supporting frame integrated with the sheet cushion 1, and the driving control of the sheet cushion 1 is the same as the sheet cushion. When the switch SBCu for instructing the upper drive of the front portion of the seat cushion 1 to be ON at the time of "state reading" (19), C
PU10 is a drive control (CuP) on the front part of the seat base.
Then, the front portion of the seat cushion 1 is driven upward. The content of this control is based on the above-mentioned “drive control on headrest” (Bu
This is the same as the contents of P). However, there is no processing corresponding to the processing of step 79.

3G. Lower drive control in front of the seat base (C
dP) If the switch SBCd for instructing lower driving of the front of the seat cushion 1 is ON at the time of "read state" (19), the CPU 10 controls the lower front driving of the seat base (Cd).
In P), the front part of the seat cushion 1 is driven downward. The content of this control is described in “Up drive control in front of seat base” (C
uP), but the driving direction is reversed.

3H. Upper drive control at the rear of the seat base (D
uP) If the switch SBDu for instructing the upper rear drive of the seat cushion 1 is on at the time of "state reading" (19), the CPU 10 controls the rear upper drive control of the seat base (Du).
In P), the rear part of the seat cushion 1 is driven upward. The contents of this control are described in the above “headrest drive control” (B
uP). However, there is no processing corresponding to the processing of step 79.

3I. Lower drive control at the rear of the seat base (D
dP) If the switch SBDd for instructing the lower drive of the rear portion of the seat cushion 1 to be turned on at the time of "state reading" (19), the CPU 10 controls the lower rear drive of the seat base (Dd).
In P), the rear part of the seat cushion 1 is driven downward. The content of this control is described in “upper drive control at rear of seat base” (D
uP), but the driving direction is reversed.

3J. Forward rotation drive control of seatback (EfP) If the switch SBEf for instructing the seatback 2 to rotate forward is ON at the time of "state reading" (19), the CPU 10 returns to the seatback. The seatback 2 is rotationally driven in the forward tilt direction by the forward rotation drive control (EfP). The content of this control is the same as the content of the above-mentioned "headrest lower drive control" (BdP). However, there is no processing corresponding to the processing of step 79.

3K. Backward rotation drive control (ErP) of the seatback If the switch SBEr for instructing the seatback 2 to rotate in the backward direction is ON at the time of the "read state" (19), the CPU 10 returns to the seatback. The seatback 2 is rotationally driven in the backward tilt direction by the backward rotation drive control (ErP). The content of this control is the same as the content of "upper drive control at the rear of the seat base" (DuP). However, there is no processing corresponding to the processing of step 79.

3L. Projection rotation drive control (FfP) of lumbar support In the case of "read status" (19), the lumbar support provided in the seat back 2 is instructed to project toward the seated person and be rotated. Switch SBFf is ON, C
The PU 10 protrudes and rotates the lumber support in the protruding direction by the lumber protruding drive control (FfP). The content of this control is the same as the “headrest lower drive control” (Bd
This is the same as the contents of P). However, there is no processing corresponding to the processing of step 79.

3M. Lumbar support retraction rotation drive control (FrP) At the time of "read status" (19), the lumbar support is
When the switch SBFr for instructing to rotate in the direction of evacuation from the occupant is on, the CPU 10 drives the lumbar support in the evacuation direction by lumbar evacuation drive control (FrP). The content of this control is the same as the content of the above-mentioned "drive control on headrest" (BuP). However, there is no processing corresponding to the processing of step 79.

3N. Registration of Sheet Posture If the switch SD for instructing the registration of the sheet posture is on at the time of “reading state” (19), the CPU 10
Referring to FIG. 9, switches SA1 to SA3 for user designation
Check whether any one of SAi is on (81,
82), when all the switches SA1 to SA3 are off,
Do not register the posture. When the switch SAi (i = 1, 2, or 3) is on, each of the position registers RPA to RPF
Are stored in the registered position registers MRPA of the attitude data table i on the EEPROM 17.
i to MRPFi (83), the appropriate front / back position data PPA corresponding to the sheet front / back position data RPA at that time
Is calculated (84), and the individual headrest adjustment value PBa = RPB-PBs of the user i (switch SAi) is calculated, and the individual adjustment value PBa is calculated by using the attitude data table i.
Is written into the individual adjustment value register MPBai, and "1" indicating that there is registration of the sheet posture data addressed to the switch SAi (user i) is written into the register FSDi addressed to the switch SAi ( 86). Note that this individual adjustment value P
Ba is the switch SAi (user) in step 62 of FIG.
This is used for the seat position addressed to the i).

3O. Automatic Posture Setting If the switch SC for instructing automatic posture setting is on at the time of “state reading” (19), the CPU 10 proceeds to FIG.
, First, "1" designating prohibition of the automatic adjustment of the headrest is written into the register FHB (87, 8).
8). Note that this "1" indicates that the seat ECU has changed from the "standby state" to the "active state" and that the state shown in FIG.
Is erased in step 53 of FIG. Next, the CPU 10
It is checked whether any one of the switches SA1 to SA3 is ON (89), and all the switches SA1 to SA3 are checked.
Is off, each of the standard position registers MRPA0 to MRP of the standard sheet posture data table 0 of the ROM 11 is set.
Each position data of F0 is read out, set as target position data of each mechanism A to F, and given to the motor controller of each mechanism driving device Ad to Fd to instruct driving to that position (9).
1). As a result, when all the switches SA1 to SA3 are turned off and the automatic posture setting is instructed, the standard sheet posture stored in the ROM 11 is automatically set.

When any one of the switches SAi (i = 1, 2 or 3) is on, the data in the register FSDi is checked, and if it is "1" (the seat attitude is registered). If there is, the position registers MRPAi to MRPFi of the sheet posture data table i of the EEPROM 17
Is read out as target position data for each of the mechanisms A to F, and given to the motor controller of each of the mechanism driving devices Ad to Fd to instruct driving to that position (90). . Thus, when any one of the switches SA1 to SAi is turned on to instruct the automatic attitude setting, the EEPROM is used.
17 is automatically set.
When the data of the register FSDi is checked, if it is "0" (no registration of the seat posture), E
No data is read from the EPROM 17 and the automatic setting of the sheet attitude is not performed. That is, turning on of the switch SC (instruction of automatic posture setting) is ignored.

3P. Cancellation of headrest automatic adjustment prohibition In steps HCO of FIG. 9, registers FIA and FIB
It is checked whether both of the data are 0 (both the position data RPA and RPB correctly indicate the current position), and if so, the following cancellation of the headrest automatic adjustment prohibition and execution of the automatic adjustment Proceed to.

First, reference is made to FIG. The CPU 10 monitors on / off of the driver seat door switch SF (9)
2 to 95), when it shows a change corresponding to the change from the closing to the opening of the driver's door, the driver (seated person)
Is changed and the seat attitude may be changed, so that the register FHB is cleared (96). That is, the data in the register FHB can be automatically adjusted (allowed) for the headrest.
And 0, which means 3Q. Automatic headrest adjustment in response to switching of automatic adjustment enable / disable instruction switch SE from off (no) to on (enable) CPU 10 turns on (allows) switch SE for designating headrest automatic adjustment permission / prohibition from off (prohibition instruction). 7 is monitored (97 to 90), and when this change is made, the process proceeds from step 90 to step 57 in FIG. 7 to move to the sheet front-back position RPA of steps 57 to 63. The headrest is driven to the associated appropriate position PBo.

3R. The seat back 2 is at the reference angle PFre
Automatic adjustment of headrest when rising to an angle of f or less Switch S for specifying permission / prohibition of automatic adjustment of headrest
Even when E is on (automatic adjustment permission designation), while the seatback 2 is at an angle exceeding the reference angle PFref (for example, the seatback 2 is parallel to the floor), this is performed at step 55 in FIG. CPU 10 does not execute the headrest automatic adjustment. When the angle is equal to or less than the reference angle PFref, the movement of the headrest is not obstructed.
In steps 101 to 104 of 0, it is checked whether or not the seatback 2 has risen below the reference angle PFref. If there is this rise, step 104 to step 57 in FIG.
, The sheet front-back position RP of steps 57 to 63
The headrest is driven to the appropriate position PBo associated with A.

3S. Automatic headrest adjustment when switching from non-occupant to existence Headrest automatic adjustment switch S for specifying permission / prohibition
Even when E is on (automatic adjustment permission designation), when there is no occupant (the occupant sensor SG is off), the CPU 10 recognizes this in step 58 of FIG. 7 and does not execute the headrest automatic adjustment. Therefore, the CPU 10
In steps 105 to 108, it is checked whether or not there has been a switch from no occupant (SG off) to a occupant (SG on). If there is this switch, the process proceeds from step 108 to step 57 in FIG. Then, in steps 57 to 63,
Proper position PBo associated with the sheet front-back position RPA
To drive the headrest.

3T. Automatic headrest adjustment when both position data RPA and RPB are determined to be accurate values according to the detected values. At least one of the data in registers FIA and FIB is 1
(RPA or RPB is incorrect), the headrest automatic adjustment is suspended, but the registers FIA, FIB
When both data are switched to 0 (both RPA and RPB are accurate), the CPU 10 recognizes this in step 109 and proceeds to step 57 in FIG.
Appropriate position P associated with the sheet front-back position RPA
The headrest drive to Bo is performed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an outline of a mechanism according to an embodiment of the present invention.

FIG. 2 is a sheet E coupled to the mechanisms AE shown in FIG.
FIG. 3 is a block diagram illustrating a configuration of a CU.

FIG. 3 is a flowchart showing a part of an outline of a control function of a CPU 10 shown in FIG. 2;

FIG. 4 is a flowchart showing another part of the outline of the control function of the CPU 10 shown in FIG. 2;

FIG. 5 is a flowchart showing another part of the outline of the control function of the CPU 10 shown in FIG. 2;

FIG. 6 is a flowchart showing another portion of the outline of the control function of the CPU 10 shown in FIG. 2;

FIG. 7 is a flowchart showing another portion of the outline of the control function of the CPU 10 shown in FIG. 2;

8 is a flowchart showing another part of the outline of the control function of the CPU 10 shown in FIG.

FIG. 9 is a flowchart showing another portion of the outline of the control function of the CPU 10 shown in FIG. 2;

FIG. 10 is a flowchart showing the rest of the outline of the control function of CPU 10 shown in FIG. 2;

FIG. 11 is a view showing the front-rear position of the sheet shown in FIG. 1 on the horizontal axis and the height of the headrest on the vertical axis, and the area detection of the seat position and the headrest height, and a position detection switch corresponding to the area. It is a graph which shows ON / OFF of A3 and B3, and the thick solid line which goes down to the left shows the appropriate headrest height corresponding to a seat position.

[Explanation of symbols]

1: Sheet cushion 2: Sheet back 3: Headrest A to F: Electric drive mechanism A1, B1: Electric motor A2, B2: Rotary encoder A3, B3: Position detection switch Ad to Fd: Mechanism Drive device ra, rb: resistor SPS: power switch for electric seat BAT: vehicle battery SA: switch group addressed to user SB: manual instruction switch group SC: automatic attitude setting instruction switch SD: attitude registration instruction switch SE: Headrest automatic adjustment instruction switch SF: Driver's door switch SG: Occupant sensor LD: Light emitting diode group

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hidetoshi Nakane 2-1-1 Asahi-cho, Kariya-shi, Aichi Prefecture Inside Aisin Seiki Co., Ltd. F-term in car Co., Ltd. (reference) 3B087 AA02 AA04 DC06 DE08 DE10

Claims (8)

[Claims] 1. An electric drive mechanism A for driving a sheet in the front-rear direction as viewed from a seated person; front-rear position detection means for detecting a sheet position in the front-rear direction; An electric driving mechanism B; a headrest position detecting means for detecting a vertical position of the headrest; a means for inputting a driving instruction; and controlling the electric driving mechanisms A and B in response to the driving instruction from the input means, and Control means for performing automatic adjustment of the headrest for driving the headrest via the electric drive mechanism B at the up and down position corresponding to the seat position in the direction. Means for prohibiting the automatic adjustment of the headrest when driven in accordance with a driving instruction by the electric seat. 2. An electric drive mechanism A for driving a sheet in the front-rear direction when viewed from a seated person; front-rear position detecting means for detecting a sheet position in the front-rear direction; and driving a headrest of the sheet up and down. Electric drive mechanism B; headrest position detecting means for detecting the vertical position of the headrest; means for inputting a drive instruction, a registration instruction and an instruction for automatic setting to a registered position; and responding to a drive instruction from the input means. To control at least one of the electric drive mechanism A or B,
The headrest is automatically adjusted to drive the headrest via the electric drive mechanism B at the vertical position corresponding to the seat position in the front-back direction, and in response to the registration instruction, the seat position in the front-back direction at that time. And a control means for registering the vertical position of the headrest in the memory and driving the seat and the headrest to the position registered in the memory in response to an instruction for automatic setting of the registered position. Means for prohibiting the automatic adjustment of the headrest when the control means drives the seat and the headrest to the position registered in the memory in response to the instruction of the automatic setting to the registered position. Electric sheet. 3. The prohibition means, when the control means drives the seat in the front-rear direction in the front-rear direction for more than a set value or for a set time or more while the headrest automatic adjustment is prohibited. 3. The electric seat according to claim 1, wherein the prohibition of the automatic adjustment of the headrest is released. 4. An electric drive mechanism A for driving a sheet in the front-rear direction when viewed from a seated person; front-rear position detecting means for detecting a sheet position in the front-rear direction; and driving a headrest of the sheet up and down. An electric driving mechanism B; a headrest position detecting means for detecting a vertical position of the headrest; a means for inputting a driving instruction; and at least one of the electric driving mechanisms A or B in response to a driving instruction from the input means. Control means for controlling the headrest to drive the headrest via the electric drive mechanism B at an up-down position corresponding to a seat position in the front-rear direction. At the door: when the means for detecting the opening and closing of the door which is opened and closed when the electric seat is seated and exits is in a state indicating that the door is closed,
Means for prohibiting the automatic adjustment of the headrest when the headrest is driven in response to a driving instruction from the input means. 5. An electric drive mechanism A for driving a sheet in the front-rear direction as viewed from a seated person; front-rear position detection means for detecting a sheet position in the front-rear direction; and driving a headrest of the sheet up and down. An electric driving mechanism B; a headrest position detecting means for detecting a vertical position of the headrest; an electric driving mechanism E for rotating the seatback of the sheet in the front-rear direction; Means for detecting a seatback angle to be detected; means for inputting a drive instruction; and electric drive mechanisms A, B, E in response to the drive instruction from the input means.
Control means for performing automatic adjustment of the headrest for driving the headrest via the electric drive mechanism B to the vertical position corresponding to the seat position in the front-rear direction. Means for prohibiting the automatic adjustment of the headrest when the rotation angle of the seatback represents a backward inclination larger than the inclination setting value of the seatback. Electric sheet. 6. An electric drive mechanism A for driving a sheet in the front-rear direction as viewed from a seated person; front-rear position detection means for detecting a sheet position in the front-rear direction; and driving a headrest of the sheet up and down. An electric driving mechanism B; a headrest position detecting means for detecting a vertical position of the headrest; a means for inputting a driving instruction; and at least one of the electric driving mechanisms A or B in response to a driving instruction from the input means. Controlling the headrest to drive the headrest via the electric drive mechanism B to a vertical position corresponding to the seat position in the front-rear direction. Means for designating permission / prohibition of automatic adjustment, wherein the control means, when permission is designated by the designation means, the headrest automatic adjustment Run, when the prohibition is specified, the headrest executes automatic adjustment pending to; electric wherein the sheet - and. 7. An electric drive mechanism A for driving the sheet in the front-rear direction as viewed from the seated person; front-rear position detecting means for detecting the sheet position in the front-rear direction; and driving the headrest of the sheet up and down. An electric driving mechanism B; a headrest position detecting means for detecting a vertical position of the headrest; a means for inputting a driving instruction; and at least one of the electric driving mechanisms A or B in response to a driving instruction from the input means. A control means for controlling the headrest to drive the headrest via the electric drive mechanism B to a vertical position corresponding to a seat position in the front-rear direction. A seating sensor for detecting whether or not a seated person is present on the seat cushion; wherein the control means performs the headrest automatic adjustment when the seating sensor detects the seated person. And row, when not detecting the seated person to hold the headrest automatic adjustment; electric sheet, characterized in that - bets. 8. An electric drive mechanism for driving a member for supporting a occupant; a pulse generator coupled to the electric drive mechanism for generating a member movement synchronizing pulse; and a data for counting the pulses and updating member position data. Position detecting means including data processing means; non-volatile memory means for holding member position data even when power is off; means for inputting drive instructions; and non-volatile memory immediately after switching from power off to on. The member position data of the means is read and set as data to be processed by the data processing means, and the electric drive mechanism is driven in response to the driving instruction from the input means, and the member updated by the data processing means is read. Control means for writing position data into the non-volatile memory means; the control means: information indicating that the electric drive mechanism is being driven at the start of driving, and information indicating that the electric drive mechanism is being stopped at the end of driving. Is written to the non-volatile memory means, and the information is read out from the non-volatile memory means immediately after switching from the power-off to the on-state. An electric sheet;