JPS6039302Y2 - Passive seat belt control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a passive seat belt control device, and relates to a splitting device for a passive seat belt device that restrains and protects an occupant in an emergency such as a vehicle collision.

Seatbelt devices are used to ensure the safety of occupants in the event of a vehicle collision, but passive seatbelt devices in particular are used to further improve occupant safety by attaching restraint belts to the occupants as they get on and off the vehicle. This makes it possible to automatically attach and release the device.

This passive seat belt device has one end attached to the side surface of the passenger seat opposite to the entrance/exit door, and the other end attached to the entrance/exit door. After getting into the vehicle, a restraint belt is put on the passenger, and when getting on and off, the belt is released to ensure space for the passenger to get on and off.

A motor is used as the driving means for attaching and releasing the occupant restraint belt;
It is sufficient to rotate the remoter for the time required for release; if the remoter is kept rotating unnecessarily, it will become locked and have an adverse effect on the remoter.

Further, an inconvenience also occurs when the occupant restraint belt stops midway for some reason and the motor becomes locked.

In other words, even if the passenger restraint belt stops midway for some reason and the drive means becomes locked, it will last for a short period of time without being damaged, or if the grease becomes hard due to low temperatures in winter, etc. Even if foreign matter or dust gets into the mechanism and the belt drive mechanism slows down, it is important to protect the occupants by ensuring sufficient operating time that there is no problem in attaching and releasing the belt, or vice versa. This is necessary due to the nature of the belt.

Further, it is important to stop the drive mechanism promptly at the attachment position and the release position from the viewpoint of protecting the lock mechanism and the drive means.

Further, in order to reliably stop the belt at the final mounting position and release position, and especially to move the belt quickly and reliably to the mounting position under all conditions, it is necessary to employ a drive means with sufficient power.

The purpose of the present invention is to drive the driving means for a predetermined period of time required for fastening or releasing the seat belt, protect the driving means from driving more than necessary, and protect the driving means from driving the seat belt more than necessary. An object of the present invention is to provide a passive seat belt control device that stops a driving means even within a predetermined time when the seat belt is moved to a seat belt position.

The passive seatbelt control device of the present invention includes a drive means for moving the seatbelt, a mode operation circuit for switching the drive means to the seatbelt attachment or release operation, and a mode operation circuit for switching the mode operation circuit to a predetermined attachment or release condition. a timer that causes the drive circuit to operate in a selected operating mode for a predetermined period of time; and a starting means that starts the timer; and a reset circuit that resets the timer based on a signal from the stop detection means and cuts off power supply to the seat belt driving means. be.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows an embodiment showing the configuration of the passive seat belt control device of the present invention.

In the figure, the passive seat belt control device is provided with a seat belt control circuit 2, which includes drive control circuits 4D, 4P, a vehicle speed control circuit 6, a warning buzzer circuit 8, and a warning lamp circuit 10.
and a power supply operation circuit 12 are provided.

The drive control circuit 4D is provided to control the rotation of a motor 14D for a certain period of time, such as a driving means for attaching or releasing the seat belt of the driver's seat (hereinafter referred to as the lower seat). A door switch 20D1 is provided in the drive control circuit 4D for the release operation.
The operating outputs of the limit switches 22D, 24D, the cancel switch 26D, and the engine ignition switch 27, as well as the outputs of the vehicle speed control circuit 6 and the power supply operation circuit 12 are input.

The door switch 20D is a switch that is disposed on the D seat door and operates in conjunction with the open/closed state of the door.

The limit switch 22D is a switch that is activated when it detects that the seat belt on the D seat side has moved to the release position.

The limit switch 24D is a switch that is activated when it detects that the seat belt on the D seat side has moved to the fastening position.

Further, the cancel switch 26D is provided to temporarily release the seat belt, and is operated by being moved by the driver.

The vehicle speed control circuit 6 generates a control output when the vehicle speed is detected to be equal to or higher than a set value, for example, 10 Jm/h based on the detection output of the vehicle speed sensor 28.

The vehicle speed sensor 28 is configured to detect the traveling speed of the vehicle and output an electrical signal in accordance with the traveling speed.

The drive control circuit 4P is provided to control, for a certain period of time, a drive means, for example, a motor 14P, for fastening or releasing the seat belt of the passenger seats other than the D seat (hereinafter referred to as the P seat). The operating outputs of the door switch 20P1, limit switches 22P and 24P, the control output of the vehicle speed control circuit 6, and the output of the power supply operation circuit 12 are input.

The door switch 20P is a switch that is disposed on the P seat side door and operates in conjunction with the opening/closing state of the door.

The limit switch 22P operates when it detects that the seat belt on the P seat side has moved to the release position, and the limit switch 24P detects that the seat belt on the P seat side has moved to the fastened position. It is a switch that operates.

The warning buzzer circuit 8 is activated when the seat belt is not fastened under conditions that require it to be fastened.
A warning means, such as a warning buzzer 16, is provided for driving the warning buzzer 16, and a warning lamp circuit 10 is associated therewith, and is provided for lighting an alarm means, such as a warning lamp 18.

These warning buzzer circuit 8 and warning lamp circuit 18 include a spool release switch 30 on the D seat side.
The operation output of the spool release switch 30P on the D and P seats is input.

These spool release switches 30P and 30D are switches that are disposed in the seatbelt retractor and are activated when the seatbelt is manually released from the restraint state of the seatbelt by the takeup spool.

The operation will be explained based on the above configuration.

Power output of the power supply operation circuit 12, that is, drive control circuit 4D, 4
P1 Drive power output for driving the vehicle speed control circuit 6, warning buzzer circuit 8, and warning lamp circuit 10■
DD is supplied to each circuit in the following cases.

That is, when the door of the D or P seat is opened, that is, either the door switch 20D or 20P is turned off, and the ignition switch 27 is turned on, the power output VDD is constantly supplied to each circuit.

Also, when the door is closed, the door switch 20D is activated. 20P are both turned on, or when the ignition switch 27 is turned off, the power output V is supplied to each circuit for a certain period of time, for example, 6 hours.

However, apart from these conditions, the drive control circuit 4D,
The power is constantly supplied to the drive circuit and motors 14D and 14P which are the drive means in the final stage of 4P.

In such an operation mode, the power supply VDD is supplied to each circuit, and the operation mode of each circuit described below is ensured without any problem. When the vehicle is parked for a long time, the circuit power supply VDD is cut off, so that unnecessary power consumption can be avoided.

Next, the circuit of the motor 14D by the drive control circuit 4D can be divided into belt attachment rotation and belt release rotation.

That is, when the door switch 20D is turned on, the motor 14
D rotates, thereby attaching the belt.

Furthermore, when the door switch 20D is turned off, the cancel switch 26D is turned on, or the ignition switch 27 is turned off, the motor 14D rotates, thereby releasing the belt.

In this case, in order for the motor 14D to rotate to release the belt, the vehicle speed must be less than a set value, for example, 10 h/h, and the vehicle speed control circuit 6 detects a vehicle speed of 10 kfIt/h or more and outputs a release prohibition output. If this occurs, rotation for belt release is not performed.

In this case, when the belt is in the released state, the vehicle speed control circuit 6 transmits the control output for belt attachment to the drive control circuit 4D.
This input causes the motor 14D to rotate, so that the belt attachment operation is performed.

Further, since the drive control circuit 4D is provided with a timer so that the rotation of the motor 14D for fastening or releasing the seat belt is performed only for a certain period of time, the operation of this timer keeps the motor 14D in the locked state for a certain period of time. The motor 14D is protected from being energized by the lock power source.

Further, when the belt moves to the attachment position or the release position, the drive control circuit 4D activates the limit switches 22D and 24D.
The timer is configured to be reset in response to a signal from the timer, and the drive means is promptly stopped at the mounting and release positions even within a predetermined time determined by the timer, and the drive means is configured to be reset in response to a signal from the timer. This prevents lock power from flowing more than necessary.

Further, the drive control circuit 4P that controls the rotation of the motor 14P for fastening or releasing the seat belt of the P seat is not operated by the cancel switch 26D and the ignition switch 26D, but the other drive control circuits 4P circuit 4d
The operation is exactly the same as that of .

That is, the time period during which the rotation of the motor 14P is controlled is similarly regulated by a timer.

Further, the timer is reset in response to the signals from the limit switches 22P and 24P, so that the driving means is promptly stopped at the attachment and release positions even within a predetermined time determined by the timer.

Warning buzzer 1 by warning buzzer circuit 8
6 is performed in the following cases.

That is, under the condition that the ignition switch 27 is on, the belt has not moved to the attachment position, the limit switch 24D or 24P is off, and the vehicle speed control circuit 6 is lOh.
When a vehicle speed of /h or more is detected and a control output is generated, the warning buzzer circuit 8 generates a drive output, and the warning buzzer 16 is activated to issue an alarm.

However, when either the spool release switch 30D or 30P is on, the ignition switch 27
When the warning buzzer circuit 8 is turned on, the warning buzzer circuit 8 similarly generates a drive output, so the warning buzzer 16 is activated and issues an alarm.

Furthermore, since the warning lamp circuit 10 also generates a drive output under the same operating conditions as the warning buzzer circuit 8, the warning lamp 18 lights up in the same way and issues an alarm.

However, since the warning buzzer circuit 8 is configured to activate the warning buzzer 16 for a certain period of time, for example, 4 to 8 seconds, unlike the lighting of the warning lamp 18, the warning buzzer 16 is activated for a certain period of time. limited to.

As explained above, the drive control circuits 4D and 4P drive each motor 14D and 14P for a certain period of time, so when the seat belt is fastened or released, the motor 14D or 14P is locked. Since the motors 14D and 14P are not left in place for an unnecessary long period of time, the motors 14D and 14P are protected from the lock power supply.

Also, due to some reason the seat belt is in the middle and the motor 14
This also eliminates the inconvenience caused by D and 14P being in a locked state.

Furthermore, limit switches 22D, 24D, and 22P are activated when the belt moves to the attachment or release position.

The timer is reset in response to the signal of 24P, and the motors 14D, 14 serving as driving means are quickly activated even within a predetermined time.
This prevents the motor from stopping, destroying the stopping mechanism, or leaving the motor in a locked state unnecessarily.

Next, a specific embodiment of the passive seat belt control device described above will be described with reference to FIG.

In the figure, the drive control circuit 4D is the mode operation circuit 40D.
1 drive circuit 52D, 54D, timer 56D, 58D
, 60D, 62D and OR circuits 64D, 66D, 68D
, 70D, 72D, 74D1 inverter 76P, 78D
, 80D, 82D, and 84D.

The mode operation circuit 40D switches the energization direction of the motor 14D to operate the rotation direction, and includes a relay 42D1 which is driven when the motor 14D is attached, and a relay 44D which is driven when the motor 14D is released.

The timers 56D to 62D are provided to restrict the rotation of the motor 14D to a certain period of time.

In this drive M control circuit 4D, the rotation of the motor 14D in the belt mounting direction is performed as follows.

That is, when the door switch 20D is turned on, a low level signal (hereinafter referred to as a low signal) is output from the door switch 20D.

This L signal is converted into a high level signal (hereinafter referred to as H) by the inverter 76D.
The signal is converted into a signal and sent to the timer 56D, and is also sent to the reset terminal R of the timer 58D via an OR circuit 68D.

This H signal activates the timer 56D, and sends an H signal for a certain period of time, for example, one hoe interval to the drive circuit 52D via the OR circuit 66D.

The drive circuit 52D is thereby started to operate, the relay 42D is driven, and the contacts are switched, so that a power supply is supplied to the B terminal of the motor 14D, and the motor 14D rotates in the direction in which the belt is attached.

Furthermore, the reason why the timer 58D is reset by the signal from the OR circuit 68D is to enable the operation of attaching and releasing the belt in conjunction with the opening and closing of the door even if the timer 56D does not complete its operation.

Furthermore, when the belt moves to the proper mounting position due to the rotation of the motor 14D, the limit switch 24D detects this and sends out an L signal.

This L signal is converted to an H signal by an inverter 78D, and this H signal is input to the reset terminal R of the timer 56D via an OR circuit 70D, and at the same time as the timer 56D is reset, the drive circuit 52D is also reset.

Therefore, the relay 42D is turned off without waiting for the activation time of the timer 56D, and the rotation of the motor 14D is stopped.

Next, the motor 14D is rotated in the belt release direction as follows.

That is, when the door switch 20D is turned off, an H signal is sent from the door switch 20D, and this H signal is sent directly to the timer 58D, and at the same time, is also sent to the reset terminal R of the timer 56D via the OR gate 70D.

Here, since the H signal is inverted by the inverter 76D and input to the timer 56D, the timer 56D is not triggered.

In this way, the timer 58D is triggered, and the H signal is sent to the drive circuit 5 through the OR circuit 64D for a predetermined period of time, for example, a fraction of seconds.
4D, the relay 44D is driven by the output of the drive circuit 54D, and the contacts are switched.

As a result, ten voltages are supplied to the A terminal of the motor 14D, and the motor 14D moves in the direction in which the belt is released.
is reversed.

Note that since the timer 56D has been reset, the relay 42D is not driven.

At the same time, this allows the user to freely attach and release the belt in conjunction with the opening and closing of the door.

Furthermore, when the belt moves to the normal position where it is released due to the rotation of the motor 14D, the limit switch 22D detects this and resets the timer 58D in the same manner as described above.
By stopping rotation of D at the normal position, continuation of the locked state can be avoided.

Further, the belt release operation is similarly performed by operating the cancel switch 26D.

That is, when cancel switch 26D is turned on, an L signal is output from cancel switch 26D, this L signal is converted to an H signal by inverter 82D, and timer 60D is activated by this H signal.

As a result, the timer 60D inputs, for example, a 1□□□H signal for a predetermined period of time to the drive circuit 54D via the OR circuit 64D, so that the rotation of the belt release motor 14D is executed in the same manner as described above.

Furthermore, turning off the ignition switch 27 also causes the motor 14D to
is rotated in the belt release direction.

That is, by turning off the ignition switch 27, the inverter 84D
An H signal is output from the timer 62, and this H signal causes the timer 62 to
D is activated, and H is applied to the OR circuit 64D for a certain period of time, for example, between one hoe.
Input the signal.

As a result, the motor 14D is similarly rotated in the belt release direction.

Next, the vehicle speed control circuit 6 includes a vehicle speed control circuit 600, a timer 602, and an inverter 604.

In order to rotate each motor 14D in the release direction using the control output of the vehicle speed control circuit 6, the vehicle speed must be below a certain speed, for example, 10 b/h or less, and if the belt is in the release state, the motor 14D rotates in the direction in which it is installed.

That is, when the vehicle speed exceeds 10 b/h, the vehicle speed detection circuit 6
00, an H signal is output, and this H signal is sent to timer 5.
Input to each reset terminal R of 8D, 60D, 62D,
This is because the operation for releasing the belt is reset and the timer 602 is activated.

Further, this H signal is input to the drive circuit 52D via the OR circuit 66D, and the motor 14D rotates in the direction in which the belt is attached.

Next, the drive control circuit 4P that drives the belt of the P seat includes a mode operation circuit 40P1 drive circuits 42P, 44P, timers 56P, 58P, OR circuits 66P, 68P, 70P.
and inverters 76P, 78P, and 80P.

The mode operation circuit 40P has the same configuration as the mode operation circuit 40D, and includes relays 42P and 44P that switch the rotation direction of the motor 14D.

This drive control circuit 4P also serves as the vehicle speed control circuit 6 and utilizes this output.

Further, this drive control circuit 4P does not include a circuit for controlling the operation of the cancel switch 26D and the ignition switch 27 in order to attach and release the belt of the P seat.

The other circuit configuration is the same as that of the drive control circuit 4D, and the operation of the mounting direction or the release direction of the motor 14P corresponding to the door switch 20P1 and the limit switches 22P and 24P is exactly the same as the operation of the drive control circuit 4P. omitted.

Here, the starting means includes a door opening/closing detection circuit consisting of a door switch 20D, 20P1 inverters 76D and 76P,
A seating detection circuit that has the same configuration as the door opening/closing detection circuit but replaces the door switch with a seating switch, and a vehicle speed sensor 28.
, a vehicle speed control circuit consisting of a vehicle speed control circuit 600, an inverter 604, and a cancel switch 26D1 inverter 8
A circuit consisting of 2D, an ignition switch 27, and an inverter 8
It is composed of at least one circuit from among the circuits consisting of 4D.

Further, the stop detection means includes a limit switch 22D for detecting the release position, and limit switches 24D and 24P for detecting the mounting position of 22P1.

Furthermore, the reset circuit includes timers 56D, 56P, and 58P.
, 58D.

60D, 62D and drive circuits 52D, 52P, 5
OR circuit 68 that outputs a reset signal to 4D and 54P
D, 68P, 70P, 72P, 74D and inverter 78
It is composed of D, 78P, 80D, and 80P.

Next, the warning buzzer circuit 8 is connected to the drive circuit 802.
, timer 804, AND circuit 806, OR circuit 808,
810, and inverters 812 and 814.

This warning buzzer circuit 8 drives the warning buzzer 16 when the ignition switch 27 is turned on, the belt has not moved to the attachment position, and the vehicle speed exceeds 1 Okrn/h.

That is, when the belt of either the D seat or the P seat has not moved to the attachment position, that is, the limit switch 24D
Or, when either one of 24P is off, an H signal is input to the OR circuit 808, so if the vehicle speed detection circuit 600 detects a vehicle speed of 10 b/h or more and outputs an H signal, the AND circuit 806 outputs an H signal, so timer 804 operates.

As a result, the timer 804 outputs an H signal for a certain period of time, for example, 4 to 8 seconds, and this H signal is input to the drive circuit 802 via the OR circuit 810.
drives the warning buzzer 16.

However, since the warning buzzer 16 is supplied with power 32 via the ignition switch 27, the activation of the warning buzzer 16 is conditional on the ignition switch 27 being turned on.

Furthermore, even if the operating time of the timer 804 has not ended, if the vehicle speed becomes less than 10 b/h or if both the limit switches 24D or 24P are turned on, the AND circuit 806 generates an L signal. This L signal is inverted by the inverter 812 and input to the reset terminal R of the timer 804, so the timer 804 stops operating.
As a result, the operation of the warning buzzer 16 is stopped.

Further, the warning buzzer circuit 8 is activated by the spool release switch 30D or 30 when the ignition switch 27 is turned on.
The warning buzzer 16 is also activated when P is turned on.

That is, when either the spool release switch 30D or 30P is turned on, an L signal is input to the inverter 814 and inverted to an H signal, and this H signal is sent to the OR circuit 8.
10, the drive circuit 802 drives the warning buzzer 16.

However, in this case as well, the condition is that the ignition switch 27 is turned on.

Next, the warning lamp circuit 10 is provided for the same purpose as the warning buzzer circuit 8,
Therefore, it also serves as a component of the warning buzzer circuit 16.

That is, the warning lamp circuit 10 includes an OR circuit 808,
In addition to the inverter 814, it includes a drive circuit 102 and an OR circuit 104.

This warning lamp circuit 10 turns on the warning lamp 18 when the ignition switch 27 is turned on and the belt has not moved to the attachment position.

That is, when the belt of either the D seat or the P seat is not attached, that is, when either the limit switch 24D or 24P is off, the OR circuit 808 outputs an H signal, so the drive circuit 102 is activated. The warning lamp 18 lights up.

However, since the warning lamp 18 is supplied with the power 32 via the ignition switch 27, the condition is that the ignition switch 27 be turned on.

Further, the warning lamp circuit 10 is connected to the ignition switch 27.
On condition that the spool release switch 30D is turned on.
Or, when either one of 30P is on, the warning lamp 18 is turned on.

That is, when either the spool release switch 30D or 30P is turned on, the inverter 814 outputs an H signal, and this H signal is input to the OR circuit 104, which activates the drive circuit 102 and lights up the warning lamp 18. do.

Other operations are the same as in the previous case. Next, the power supply operation circuit 12 is composed of a timer 120, a NOR circuit 122, an AND circuit 124, and an OR circuit 126. The power supply 32 is input to the AND circuit 124, and the OR circuit 126
A power source 32 is input to the ignition switch 27 via the ignition switch 27.

The operating power supply V is the output of the OR circuit 126.

0 is input to each of the above-mentioned circuits via a resistor.

The VDD on the arrow of each circuit indicates this.

In the power supply operation circuit 12, door switches 20D, 20
The outputs of P and the ignition switch 27 are all input to the OR circuit 126, and the outputs of the door switches 20D and 20P are respectively input to the OR circuit 126.
Since the ignition switch 27 generates an H signal when it is turned off and an H signal when it is turned on, the OR circuit 126 supplies the electric drift output DD to each circuit in such a case.

In addition to this operation, the door switch 20D,
When 20P is turned on and the ignition switch 27 is turned off, the input to the OR circuit 126 becomes a total signal, so the OR circuit 126 no longer outputs the power output ■DD, but at the same time the NOR circuit 122 outputs an H signal. , the timer 120 is activated by this H signal.

That is, since the timer 120 inputs the 6-way H signal to the AND circuit 124 for a certain period of time, for example in this embodiment, the AND circuit 124 inputs the H signal output to the 6-way OR circuit 126, and similarly Power output ■.

D will be output for ω seconds. Therefore, in this case, each circuit is guaranteed to operate for a certain period of time, that is, 6□□□.

Next, modifications of the mounting control circuits in the drive control circuits 4D and 4P will be explained based on FIGS. 3 to 14.

The circuit shown in FIG. 3 is the inverter 76 of the circuit shown in FIG.
D and 78D are replaced with negative logic inverters.

Even in this case, similar mounting control is possible.

The circuit shown in Fig. 4 is the timer 5 in the circuit shown in Fig. 3.
Except for 6D, a current detection circuit 200D is inserted between the drive circuit 52D and the motor 14D, and an AND circuit 202D is inserted between the drive circuit 52D and the inverter 76D.
is inserted, and the detection output of the current detection circuit 200D is input to this AND circuit 202D via an inverter 204D.

The power supply detection circuit 200D detects the current of the motor 14D,
It is configured to generate an H signal output in a locked state with a constant current or higher.

Therefore, according to such a circuit, when the motor 14D is in a locked state and the current is detected by the current detection circuit 200D, an H signal is output from the current detection circuit 200D, and this signal is inverted by the inverter 204D. is input to the AND circuit 202D, so the drive circuit 5
2D operation will stop.

Therefore, when the motor 14D enters the locked state, it immediately stops, and the motor 14D is protected from the lock current.

The circuit shown in FIG. 5 is constructed by adding a rotation sensor 206D and a rotation detection circuit 208D in place of the current detection circuit 200D in the circuit shown in FIG. 4.

The rotation sensor 206D detects the rotation of the motor 14D, and the rotation detection circuit 208D generates an H signal output for a certain period of time based on this detection output when the rotation sensor 206D detects that the rotation of the motor 14D has stopped.

Therefore, in the same way as the circuit shown in FIG.
D can be protected.

The circuit shown in FIG. 6 is constructed by adding a mounting switch 210D, an inverter 210D, and an OR circuit 214D to the circuit shown in FIG. 3.

The attachment switch 210D is a switch that is activated by detecting the seating state of the driver in the D seat, for example, and can similarly rotate the belt attachment motor 14D based on the ON operation of this attachment switch.

The circuit shown in FIG. 7 is attached to the circuit shown in FIG.
10D, an inverter 212D, and an OR circuit 214D, and its operation combines the operations of the circuit shown in FIG. 4 and the circuit shown in FIG.

The circuit shown in FIG. 8 is constructed by adding a mounting switch 210D, an inverter 212, and an OR circuit 214D in the same manner as in FIG. 7 to the circuit shown in FIG. 5.

The circuit shown in FIG. 9 is constructed by adding a vehicle speed sensor 28 and a vehicle speed detection circuit 600 in place of the mounting switch 210 and inverter 212D in the circuit shown in FIG.

According to this circuit, when the vehicle speed detection circuit 600 detects a vehicle speed equal to or higher than a predetermined value and generates an output, the motor 14D can be similarly rotated.

The circuit shown in FIG. 10 is constructed by adding a current detection circuit 200D and an inverter 204D, similar to the circuit shown in FIG. 4, in place of the timer 56D in the circuit shown in FIG.

Therefore, according to this rotation, in addition to the operation of the circuit shown in FIG. 9, as in the circuit shown in FIG. 4, the adverse effects caused by the lock current of the motor 14D are prevented.

The circuit shown in FIG. 11 is constructed by adding a rotation sensor 206D and a rotation detection circuit 208D in place of the current detection circuit 200D, similar to the circuit shown in FIG. 5, in the circuit shown in FIG.

Therefore, according to such a circuit, as described in the circuit shown in FIG. 5, the locked state of the motor 14D can be detected by rotation detection, and the motor 14D can be stopped.

The circuit shown in FIG. 12 is the circuit shown in FIG. 9 except that the OR circuit 214D is replaced with an OR circuit 216D, and the mounting switch 210D and the inverter 212 are connected in the same way as the circuit shown in FIG.
It is configured by adding D.

Therefore, according to this circuit, the operation of the circuit shown in FIG. 6 is added to the operation of the circuit shown in FIG. 9.

The circuit shown in FIG. 13 is constructed by adding a current detection circuit 200D and an inverter 204D, similar to the circuit shown in FIG. 10, in place of the timer 56D in the circuit shown in FIG. 12.

Therefore, according to this circuit, the operation described in FIG. 10 is added to the operation of the circuit shown in No. 12.

The circuit shown in FIG. 14 is constructed in the same way as the circuit shown in FIG. 11 in place of the current detection circuit 200D in the circuit shown in FIG. 13.

Therefore, the same operation as described in FIG. 11 can be obtained.

Next, modifications of the release control circuit in the drive control circuits 4D and 4P will be explained with reference to FIGS. 15 to 26.

The circuit shown in FIG. 15 is constructed by inverter 80D shown in FIG. 2 as a negative logic inverter.

Such a circuit also provides the same operation as the circuit shown in FIG.

The circuit shown in FIG. 16 is the circuit shown in FIG. 15 except that a current detection circuit 300D is inserted between the drive circuit 54D and the motor 14D instead of the timer 58D, and an AND circuit 302D is inserted on the input side of the drive circuit 54D. The detection output of the current detection circuit 300D is inverted by an inverter 304D and inputted to an AND circuit 302D.

Also, the AND circuit 302D includes a limit switch 22D.
The on/off operation output is input.

Such a circuit provides the same operation as the circuit shown in FIG.

The circuit shown in FIG. 17 is constructed by using a rotation sensor 306D and a rotation detection circuit 308D in place of the power supply detection circuit 300D in the circuit shown in FIG. 16.

Such a circuit provides the same operation as the circuit shown in FIG.

The circuit shown in FIG. 18 is constructed by adding a cancel switch 26D, an inverter 312D, and an OR circuit 314D to the circuit shown in FIG. 15.

According to such a circuit, when the cancel switch 26D is turned on, the motor 14D rotates for a canceling operation.

The circuit shown in FIG. 19 uses a current detection circuit 300D1 inverter 3 instead of the timer 58D in the circuit shown in FIG.
04 and an AND circuit 302D.

According to such a circuit, the operation of the circuit shown in FIG. 16 is added to the operation of the circuit shown in FIG. 18.

The circuit shown in FIG. 20 is constructed by including a rotation sensor 306D and a rotation detection circuit 308D in place of the current detection circuit 300D of the circuit shown in FIG.

According to such a circuit, the same operation as the circuit shown in FIG. 17 can be obtained.

The circuit shown in FIG. 21 has an ignition switch 27 and an inverter 84D instead of the cancel switch 26D and inverter 312D in the circuit shown in FIG. 18.

According to such a circuit, when the ignition switch 27 is turned off, the motor 14D can be rotated to release the belt.

In the circuit shown in FIG. 21, the circuit shown in FIG. 22 includes a current detection circuit 300D, similar to the circuit shown in the timer 58D,
It is configured with an inverter 304D and an AND circuit 302D.

According to such a circuit, the same operation as the circuit shown in FIG. 16 can be obtained.

The circuit shown in FIG. 23 is constructed by using a rotation sensor 306D and a rotation detection circuit 308D in place of the current detection circuit 300D in the circuit shown in FIG. 22.

According to such a circuit, the same operation as the circuit shown in FIG. 17 can be obtained.

The circuit shown in FIG. 24 is constructed by adding a cancel switch 26D and an inverter 312D to the circuit shown in FIG.
It was constructed by converting it into a terminal.

According to such a circuit, in addition to the operation of the circuit shown in FIG. 21, the operation of the circuit shown in FIG. 18 is added.

The circuit shown in FIG. 25 uses a current detection circuit 300D1 inverter 3 instead of the timer 62D in the circuit shown in FIG.
04D and an AND circuit 302D.

According to such a circuit, the operation of the current detection circuit 300D is added as described above.

The circuit shown in FIG. 26 is constructed by using a rotation sensor 306D and a rotation detection circuit 308D in place of the current detection circuit 300D in the circuit shown in FIG. 25.

According to such a circuit, the same operation as the circuit shown in FIG. 25 can be obtained.

Next, modified examples of the warning buzzer circuit 8 will be explained with reference to FIGS. 27 to 38.

The circuit shown in FIG. 27 is the same as the drive circuit 8 except for the timer 804 and inverter 812 in the circuit shown in FIG.
An AND circuit 820 is inserted before 02, and the ON/OFF output of the ignition switch 27 is input to this AND circuit 820.

Therefore, according to such a circuit, the timer 804 does not ensure operation for a certain period of time, and furthermore, the ignition switch 2
7 will be added to the conditions associated with the on/off operation.

The circuit shown in FIG. 28 is the circuit shown in FIG. 27, in order to add a condition for the detection output of the vehicle speed detection circuit 600, this detection output and the operating output of the limit switch 24D are sent to an OR circuit 810 via an AND circuit 806. It is designed to be input.

Therefore, according to such a circuit, in addition to the operation shown in FIG. 27, the limit switch 24D must not only be turned on, but also the vehicle speed detection circuit 600 must detect a vehicle speed higher than the set value and generate the H signal output. In this case, the drive circuit 802 will not generate a drive output.

The circuit shown in FIG. 29 is the same as the circuit shown in FIG. 28, but a timer 804 that generates an operating output for a certain period of time and an inverter 812 are inserted at the rear end of the AND circuit 806.

According to such a circuit, in addition to the operation of the circuit shown in FIG.

The circuit shown in FIG. 30 is the same as the circuit shown in FIG. 27, but instead of the operating output of the limit switch 24, the detection output of the current detection circuit 200D described above is input.

According to such a circuit, it is possible to drive the warning buzzer 16 by detecting that the motor 14D is in the locked state.

The circuit shown in FIG. 31 is constructed by using a current detection circuit 200D in place of the limit switch 24D in the circuit shown in FIG. 28, similar to the circuit shown in FIG. 30.

According to such a circuit, when the vehicle speed detection circuit 600 detects a vehicle speed equal to or higher than a predetermined value and outputs an H signal, and detects the stoppage of rotation of the motor 14D from the force sensing current of the current detection circuit 20OD, The warning buzzer 16 can also be driven.

The circuit shown in FIG. 32 is constructed by adding a timer 804 and an inverter 812 in the same way as the circuit shown in FIG. 29 in the circuit shown in FIG. 31.

Therefore, according to this circuit, the driving of the warning buzzer 16 is regulated according to the operating time of the timer 804.

The circuit shown in FIG. 39 is the circuit shown in FIG. 28, in which the current detection circuit 20G replaces the detection output of the vehicle speed detection circuit 60G.
The output of 0D is inputted.

The circuit shown in FIG. 34 is the circuit shown in FIG. 33, except that the AND circuit 806 is replaced with a three-terminal AND circuit 822, and the detection output of the vehicle speed detection circuit 600 can be input to this one terminal.

Therefore, according to such a circuit, in order to generate a drive output from the drive circuit 802, at least the current detection circuit 200D generates an output and the vehicle speed detection circuit 600
It is necessary that the limit switch 24D generates an output and that the limit switch 24D is turned off.

The circuit shown in FIG. 35 is constructed by adding a timer 804 and an inverter 812 to the circuit shown in FIG.

According to such a circuit, the operating time of the warning buzzer 16 is regulated by the operating time of the timer 804.

The circuit shown in FIG. 36 is the circuit shown in FIG. 33, but instead of the output of the current detection circuit 200D, a rotation detection circuit 208D is used.
The detection output is inputted.

According to such a circuit, even when the limit switch 24D is turned off and the rotation detection circuit 208D detects that the motor 14D has stopped rotating, the warning buzzer 1 is emitted.
6 can be driven.

Therefore, the driver can know that the seat belt is not properly fastened because the belt stops halfway.

The circuit shown in FIG. 37 uses a three-terminal AND circuit 822 in place of the AND circuit 806 in the circuit shown in FIG. 36, and further inputs the detection output of the vehicle speed detection circuit 600.

According to such a circuit, in order for the AND circuit 822 to output an H signal, the condition is that the vehicle speed detection circuit 600 detects a vehicle speed equal to or higher than a set value and generates an output.

The circuit shown in FIG. 38 is constructed by adding a timer 804 and an inverter 812 to the circuit shown in FIG. 37.

Therefore, according to such a circuit, the operation of the warning buzzer 16 in the circuit shown in FIG. 37 is regulated by the operation time of the timer 804.

Next, a modification of the warning buzzer circuit 8 will be explained based on FIGS. 39 to 42.

The circuit shown in FIG. 39 is the circuit shown in FIG. 2 by inserting an AND circuit 120 on the input side of the drive circuit 102, and
The AND circuit 120 is configured to input the output of the ignition switch 27.

According to such a circuit, in addition to the operating conditions shown in FIG. 2, the condition is that the ignition switch 27 is turned on.

Therefore, the warning lamp 18 will not light up unless the ignition switch 27 is turned on.

The circuit shown in FIG. 40 is the circuit shown in FIG. 39 except that the output of the current detection circuit 200D is input to the OR circuit 104 instead of the limit switch 24D.

According to such a circuit, when the current detection circuit 200D detects the lock current of the motor and inputs the H signal output to the AND circuit 120 on the condition that the ignition switch 27 is turned on, the warning lamp 18 will light up and issue an alarm.

The circuit shown in FIG. 41 is the same as the circuit shown in FIG.
The detection output of 0D is inputted.

According to this circuit, even if the limit switch 24D is off, the warning lamp 18 will not light up unless the current detection circuit 200D detects the locked state of the motor 14D and generates an H signal output.

The circuit shown in FIG. 42 is the circuit shown in FIG. 41, but instead of the output of the current detection circuit 200D, the rotation detection circuit 208D
The output is input to the AND circuit 122.

According to such a circuit, the rotation detection circuit 208D can detect the stoppage of the motor 14D in the locked state, and the warning lamp 18 can be turned on on condition that the limit switch 24D is turned off.

As explained above, according to the present invention, the operating time of the driving means for driving the occupant restraint belt is limited to a certain period of time at worst, so even if the driving means is locked for some reason, the driving means will continue to operate. Its destruction can be prevented by cutting off the power supply to it.

In addition, in normal use, the driving means is stopped based on the signal from the seatbelt stop detection means, and the timer is reset, so that the seatbelt is properly fastened or released, and the driving means is Since the electric power supply is suppressed to the necessary minimum, power saving and reliability of the driving means can be improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of the passive seat belt control device of the present invention, Fig. 2 is a circuit diagram showing its specific circuit, and Figs. 3 to 14 are modified examples of the attachment control circuit of the drive control circuit. 15 to 26 are circuit diagrams showing modified examples of the release control circuit, and FIGS. 27 to 3 are circuit diagrams showing modified examples of the release control circuit.
Figure 8 is a circuit diagram showing a modification of the warning buzzer circuit.
FIGS. 39 to 42 are circuit diagrams showing modified examples of the warning lamp circuit. 2...Seat belt control circuit, 4D, 4P...
...Drive control circuit 14D, 14P...Motor, 56D, 56P, 58D, 58P, 62D...
...Timer

Claims (6)

[Scope of utility model registration request] (1) A drive means for moving the seat belt, a mode operation circuit that switches the drive means to the seat belt attachment or release operation, and a drive circuit that switches the mode operation circuit according to predetermined attachment or release conditions. a timer that causes the drive circuit to operate in a selected operating mode for a predetermined period of time; a starting means that starts the timer; and detecting that movement of the seat belt has stopped within the predetermined period of time set by the timer. A passive seatbelt control device comprising: stoppage detection means; and a reset circuit that resets the timer based on a signal from the stoppage detection means and cuts off power supply to the seatbelt driving means. (2) The passive seatbelt control device according to claim 1, wherein the seatbelt stoppage detection means is constituted by a position detection circuit that detects the attachment or release position of the seatbelt. (3) The passive seat belt control device as set forth in claim 1, wherein the starting means is constituted by a door opening/closing detection circuit. (4) Utility model registration claim 1, wherein the starting means is constituted by a door opening/closing detection circuit and an occupant seating detection circuit.
Passive seat belt control device as described in section. (5) The passive seat belt control device according to claim 1, wherein the starting means includes a door opening/closing detection circuit and a vehicle speed control circuit. (6) The passive seat belt control device according to claim 1, wherein the starting means includes a door opening/closing detection circuit, a vehicle speed control circuit, and an occupant seating control circuit.