JPH0591927A - Double-sided rock type reclining device - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the generation of abnormal noise due to backlash and to ensure the synchronized operation of the left and right lock mechanisms. [Structure] The lock mechanisms 50 and 51 for restricting the swing of the arm plates 16 and 17 with respect to the base plates 12 and 13 are provided in
Each of them is configured to be operable under 0,21 rotations. Then, the extension shaft 64 of the drive side main shaft 20 is connected to the extended end 66 of the driven side main shaft and the spring pin
The main shafts 20 and 21 on the driving side and the driven side are directly and integrally rotatably connected by being fixed by 76.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supports a seat back so as to be swingable in the front-rear direction with respect to a seat cushion, and operates a lock mechanism provided on both sides of the seat in synchronization with each other, thereby inclining the seat back at an inclination angle ( The present invention relates to a double-sided lock type reclining device in which a reclining angle) is arbitrarily set.

[0002]

2. Description of the Related Art For example, for a seat cushion,
A reclining device that arbitrarily adjusts a tilt angle (reclining angle) of a seat back by swinging the seat back in the front-rear direction is attached to a seat of a vehicle or the like.

The reclining device is constructed, for example, of a base plate attached to a seat cushion and an arm plate attached to a seat back. The arm plate is swingably connected to the base plate by a main shaft. There is. The reclining device includes, for example, a lock mechanism that interlocks with an operation member such as an operation handle, and the rocking of the seat back relative to the seat cushion is restricted by locking the lock mechanism. As a lock mechanism, for example, a combination of a lock groove formed in an arm plate and a lock claw that is formed so as to be engageable with the lock groove and that interlocks with an operating member is well known.

In such a reclining device, the operating member and the lock mechanism are usually linked so as to be interlockable via a transmission means provided with various gears, links, etc., which are appropriately combined, and by the transmission means, The operation force of the operation member is transmitted and converted to the lock and lock-off operation of the lock mechanism.

Here, as such a reclining device, for example, a so-called double-sided lock type seat reclining device in which a lock mechanism is provided on the left and right sides of the seat is known. In such a double-sided lock type reclining device, the side having the operating member is formed as the driving side of the reclining device, and the locking mechanism of the other side to be the driven side is synchronized with the locking mechanism of the driving side. It is operably connected by a connecting member such as a connecting rod.

[0006]

However, in the known configuration, the operating force from the operating member is transmitted to the drive side locking mechanism via the transmitting means, and also via both the connecting rod and the transmitting means. It is transmitted to the lock mechanism on the driven side. Therefore, the number of parts is large, the configuration is complicated, and the reclining device itself is easily increased in size, which is not preferable.

The left and right lock mechanisms are synchronously connected to each other via the connecting rod. In such a structure, basically, rattling is likely to occur in the axial direction of the connecting rod, and the rattling of the connecting rod is caused. When it occurs, an abnormal noise is generated as the automobile travels. The generation of abnormal noise during running may give a seated person an uncomfortable feeling and anxiety, and may reduce the comfort of the seated person.

Further, since the operating force from the operating member is indirectly transmitted to the lock mechanism on the driven side via the connecting rod and the transmitting member, if a slight error occurs in the connecting rod, the transmitting means, etc. There is a gap in the lock and lock-off operations of the lock mechanism on the drive side and the driven side. Therefore, the synchronized operation of the left and right lock mechanisms cannot be sufficiently obtained due to the rotation operation of the operation member, and the reclining device may malfunction.

An object of the present invention is to provide a double-sided lock type reclining device which prevents generation of abnormal noise due to backlash and ensures synchronized operation of the left and right lock mechanisms.

[0010]

In order to achieve this object, according to the present invention, a base plate and an arm plate, which are swingably connected by a main shaft, are arranged on the left and right sides of the seat, respectively. A lock mechanism that restricts the swing of the arm plate with respect to the base plate corresponds to the left and right main shafts and is operable under the rotation of the left and right main shafts.

Further, by disposing the operating member which can rotate integrally, either one of the main shaft which is the driving side and the main shaft which is the other side which is the driven side extends along the axis line to the opposite side. The main shaft is integrally formed with the shaft, and the other main shaft is integrally formed with an extended end extending to the opposite side. The main shaft of the drive side and the main shaft of the driven side are directly and integrally rotatably connected by the extension shaft, the connection between the extension ends, and the fixing by a fixing member such as a spring pin.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, in the reclining device 10 of the both-side lock type according to the present invention, the base plates 12, 1 attached to the seat cushion side.
3 and arm plates 16 and 17 attached to the seat back side are arranged on the left and right of a seat (not shown), respectively. The arm plates 16 and 17 are connected to the base plates 12 and 13 by the main shafts 20 and 21 so as to be swingable in the front-rear direction.

As can be seen from FIG. 1, the spindles 20, 21
Are integrally formed with large-diameter locking pieces 20a, 21a at one end, respectively, and are inserted through the insertion holes 26 of the base plates 12, 13 and the insertion holes 28 of the arm plates 16, 17 continuously. It is set up. Then, for example, by mounting the washer 30 on the side of the base plate and inserting the washer into the main shafts 20 and 21, for example, by fitting the spring pin 32, the space between the base plate 12 and the arm plate 16 and between the base plate 13 and the arm plate. Each of the 17 spaces is permanently connected.

The spindles 20 and 21 are disposed between the base plate 12 and the arm plate 16 and between the base plate 13 and the arm plate.
The lead screw 34 is formed on the outer periphery of the corresponding portion between 17 and respectively. Then, the drive plates 38, 39 integrally having the nut 36 that can be screwed into the lead screw 34 in the center part are provided around the main shafts 20, 21 between the base plate 12, the arm plates 16 and the base plate 13,
They are arranged between the arm plates 17, respectively. The nut 36 of the drive plate is formed in a boss shape, and, for example, the nut of the drive plate 38 is projected to the arm plate side and the nut of the drive plate 39 is projected to the base plate side.

Then, for example, the lock plate 42 having the insertion hole 40 into which the nut 36 of the drive plate can be loosely inserted is arranged around the nut, between the drive plate 38 and the arm plate 16 and between the drive plate 39 and the base plate 13. Are arranged respectively. That is, the lock plate 42 is supported by the drive plates 38 and 39, respectively.

The drive plates 38, 39 and the lock plate 42 are formed, for example, with notches (not shown) of the same shape, respectively, and are cut by a stopper 44 provided on the inner surfaces of the base plates 12, 13. The drive plate and the lock plate are non-rotatable and movable in the axial direction of the main shafts 20 and 21, respectively, by continuously inserting and engaging the notches.

In such a structure, the nut 36 is screwed in and out of the lead screw 34 as the main shafts 20, 21 rotate, that is, the drive plates 38, 3 in the axial direction of the main shafts.
9. The movement of the lock plate 42 can be surely obtained.

Here, as shown in FIG. 1, in the present invention, the arm plates 16 and 17 and the lock plate 42 are
A pair of tooth portions 46, 47 that can mesh with each other are provided so as to face each other, and the pair of tooth portions are formed as the left and right locking mechanisms 50, 51 of the double-sided lock type reclining device 10, respectively.

For example, the tooth portion 46 of the arm plate has an inner surface, that is, a surface facing the lock plate 42, and has a through hole 28.
Are formed in the shape of a crown gear centered at, respectively. In addition, the tooth portion 47 of the lock plate is
Is formed in an arc shape corresponding to the tooth portion 46 of the arm plate, for example.

In such a structure, the lock plate 42
However, since they are non-rotatably supported with respect to the base plates 12 and 13, when the tooth portions 46 of the arm plate and the tooth portions 47 of the lock plate are in mesh with each other, the lock mechanisms 50 and 51 are in the locked state, and The swing of the arm plate 16 and the swing of the arm plate 17 with respect to the base plate 13 are restricted.

When the drive plates 38, 39 and the lock plate 42 move in the axial direction with the rotation of the main shafts 20, 21, the lock plate moves in a direction away from the arm plates 16, 17, and the teeth of the lock plate are moved. When the part 47 separates from the tooth 46 of the arm plate, the locking mechanism 50, 51
Is locked off. Then, the swing regulation of the arm plate 16 with respect to the base plate 12 and the swing regulation of the arm plate 17 with respect to the base plate 13 are released, and the tilt angle (reclining angle) of the seat back can be adjusted by the swing of the arm plate.

Further, as shown in FIG. 1, the lock plate
42 is biased in the drive plate direction by biasing means 54 and 55, for example, so that it can move following the drive plate 38. As the biasing means 54, for example, a compression coil spring wound around the main shaft 20 between the arm plate 16 and the lock plate can be used. Also, the bias means
As 55, a compression type leaf spring arranged around the main shaft 21 between the base plate 13 and the lock plate 42 can be used.

In such a structure, for example, on the left side in the figure, the drive plate is rotated by the rotation of the main shaft 20.
When 38 moves away from the arm plate 16,
The lock plate 42 moves following the drive plate 38 by the biasing force of the compression coil spring (biasing means) 54. When the drive plate 38 moves toward the arm plate due to the rotation of the main shaft 20, the lock plate 42
Is pressed against the biasing force of the compression coil spring 54, and moves in the arm plate direction together with the drive plate 38.

On the right side of the drawing, when the drive plate 39 moves in the direction away from the arm plate 17 due to the rotation of the main shaft 21, the lock plate 42 resists the biasing force of the leaf spring (biasing means) 55. It is pressed and moves in the direction of the base plate together with the drive plate 39. And
When the drive plate 39 moves toward the arm plate due to the rotation of the main shaft 21, the lock plate 42 moves following the drive plate 39 by the biasing force of the leaf spring 55.

In such a structure, the rotation of the main shafts 20 and 21 is directly transmitted to the lock mechanisms 50 and 51, and each lock mechanism operates under the rotation of the opposed main shafts, so that individual transmission means, etc. Is unnecessary. Therefore, the number of parts can be reduced,
The structure can be simplified and the reclining device itself can be downsized.

The double-sided lock type reclining device 10 according to the present invention has a lock mechanism 5 that is rotated by the rotation of the main shafts 20 and 21.
The structure and operation of the lock mechanism described in the above embodiment is not limited because any structure capable of operating 0,51 is sufficient. The configuration and operation centered on the lock mechanisms 50 and 51 are not the purpose of the present invention, and therefore will not be described in detail here.

As shown in FIGS. 1 and 2, in the double-sided lock type reclining device 10 having such a configuration, one main shaft on the left and right sides, for example, one end of the main shaft 20 on the left side in the drawings, The operating member 58 is directly and integrally attached rotatably, and the main shaft can be directly rotated by rotating the operating member. Operation member
As the 58, for example, an operation handle as illustrated in FIGS. 1 and 2 can be used, and the operation handle is obtained by fitting a protrusion piece 60 at one end of the main shaft and a pair of spline shafts provided on a bearing 62 of the operation handle. The main shaft 20 is integrally and rotatably mounted.

In such a structure, the left side is formed as the driving side of the double-sided lock type reclining device 10 which is directly driven under the rotation operation of the operation handle 58. Further, in such a configuration, the drive-side main shaft 20 is linked to the right-side main shaft 21 that is the driven side so as to be interlocked.

Here, according to the present invention, the main shaft 20 on the driving side and the main shaft 21 on the driven side are directly connected without any other transmission means or the like, and the driving side and the driven side are connected. The lock mechanisms 50 and 51 are configured to operate in synchronization.

As shown in FIGS. 1 and 2, the main shaft 20 on the driving side is integrally formed with an extension shaft 64 extending along the axis in the direction of the driven side, and the main shaft 20 on the driven side is formed. The main shaft 21 is integrally formed with an extension end 66 extending in the drive side direction.

The extending end 66 of the main shaft 21 has, for example, a hollow portion 68.
And a through hole 70 penetrating in a direction orthogonal to the axis is formed in communication with the hollow portion.
Further, the extension shaft 64 of the main shaft 20 is formed with an insertion piece 72 that can be inserted into the hollow portion of the extension end at the tip end portion thereof. The insertion piece 72 is formed to have a diameter smaller than that of the extension shaft 64 via a step, for example, and a cut groove 74 that can be aligned with the through hole 70 at the extension end is provided at the tip of the insertion piece. The cut groove 74 is formed so as to extend in the axial direction of the extension shaft 64 and penetrate in a direction orthogonal to the axial line.

Then, for example, a male screw and a female screw that can be screwed with each other are formed on the outer peripheral surface of the insertion piece 72 and the inner peripheral surface of the hollow portion 68, respectively.

In such a structure, by inserting the insertion piece 72 into the hollow portion 68 as the male screw and the female screw are screwed together, the space between the extension shaft 64 and the extension end 66, that is, the drive side,
The driven-side main shafts 20 and 21 are connected to each other, and the through-holes 70 at the aligned extension ends, the continuous fixing member to the cut groove 74 of the insertion piece,
For example, by inserting the spring pin 76, the main shaft 20,2
1 is rotatably fixed integrally.

In such a configuration, the drive side and driven side lock mechanisms 50 and 51 are operated in synchronization with each other by the integral rotation of the main shafts 20 and 21 due to the rotation operation of the operation handle 58, and the respective locks are locked. An integral locking and locking-off operation of the mechanism can be obtained.

As described above, according to the present invention, the drive side and driven side lock mechanisms 50, 51 are provided with the main shafts 20, 21.
It is configured to be operable under the rotation of. The drive-side main shaft 20 having the operation handle 58 at one end and the driven-side main shaft 21 are directly connected by fixing the extension shaft 64 of the main shaft 20 and the extension end 66 of the main shaft 21. That is, since the transmission means composed of a combination of various gears and links can be omitted, the number of parts can be reduced, the configuration can be simplified, and the reclining device itself can be downsized.

Then, the rotational operation force from the operation handle 58 is transmitted through the main shaft 20 on the driving side to the main shaft on the driven side.
Directly transmitted to 21. Therefore, it is possible to prevent the lock and lock-off operations of the drive-side and driven-side lock mechanisms 50 and 51 from deviating from each other. It is possible to prevent malfunction and malfunction of the reclining device 10 of a type.

Further, extension shafts 64, which are connected and fixed to each other,
The extended end 66 is the main shaft 20 on the driving side and the main shaft on the driven side.
Since they are formed integrally with each other, the rattling in the axial direction can be sufficiently prevented. Therefore, it is possible to prevent the generation of abnormal noise due to backlash, and the comfort of the seated person is secured without giving the seated person a feeling of discomfort or anxiety.

Here, in the embodiment, the drive side main shaft 20 is the extension shaft 64, and the driven side main shaft 21 is the extension end 66.
However, on the contrary, the same structure as described above may be adopted in which the extension shaft is provided on the driven side main shaft 21 and the extension end is provided on the drive side main shaft 20. Needless to say, the effect of can be obtained.

Further, the extension end 66 is provided with the hollow portion 68 and the extension shaft 64 is provided with the insertion piece 72. On the contrary, on the contrary, the extension shaft is provided with the hollow portion and the extension end is provided with the insertion piece. It may be provided.

In the embodiment, a pair of screws and female threads are formed on the outer peripheral surface of the insert piece 72 and the inner peripheral surface of the hollow portion 68, but the invention is not limited to this. Only the insertion of the insertion piece and the insertion of the spring pin 76 into the hollow portion without forming a tooth and between the extension shaft 64 and the extension end 66, that is, the main shaft 2 on the driving side and the driven side.
It may be configured to connect 0 and 21.

However, as in the embodiment, a male screw,
In the configuration in which the extension shaft 64 and the extension end 66 are connected under the screwing of the female screw, in addition to preventing the spring pin 76 from shifting in the rotation direction, the screwing of the male screw and the female screw is also possible. Thus, the displacement of the extension shaft and the extension end in the axial direction and the orthogonal direction can be reliably prevented. Therefore, there is no play between the extension shaft 64 and the extension end 66 in the axial direction and the orthogonal direction, and from this point as well, the generation of abnormal noise due to the play can be prevented more reliably.

Further, the insertion piece 72 is formed with a cut groove 74 aligned with the through hole 70 of the hollow portion 68 at the extension end, but the extension shaft is formed under the continuous fitting of the spring pin 76. Since it suffices to integrally and rotatably fix the extended ends, the invention is not limited to the kerf, and for example, an insertion hole into which a spring pin can be inserted may be formed in the insertion piece.

However, by forming the cut groove 74 extending in the axial direction, for example, even if an error occurs in the width direction of the seat at the mounting position of the base plates 12 and 13 on the driving side and the driven side, The error can be sufficiently absorbed by the fitting position of the spring pin 76. Therefore, the installation of the extension shaft 64, the extension end 66 itself and the base plates 12 and 13 does not require so high accuracy, and the molding process of each member and the mounting process to each side of the sheet can be easily performed. However, workability can be improved.

If the length of the insert piece 72, the depth of the cut groove 74, the depth of the hollow portion 68, etc. are sufficiently provided, the width between the driving side and the driven side can be freely set within a certain range. Can be adjusted and set. That is, the width of the seat to be mounted is not limited to a constant width. Therefore, it can be mounted on various seats, and the reclining device 10 of double-sided lock type having excellent versatility can be configured.

Further, in the embodiment, the main shafts 20 and 21 on the driving side and the driven side are connected by the extension shaft 64 formed integrally with the main shaft 20. However, the present invention is not limited to this, and the main shafts of the driving side and the driven side may be interlockingly connected by a connecting member such as a connecting rod formed separately from the main shafts 20 and 21.

However, in the structure of the embodiment, it suffices to fix the extension shaft 64 to the extension end 66 of the main shaft on the other side. Therefore, the work process can be reduced, and workability can be improved also from this point.

Further, in the embodiment, the operation handle 58 is illustrated as an operation member, but it is sufficient if the main shafts 20 and 21 can be easily rotated, and the operation handle is not limited to the operation handle. For example, an operation lever or the like. Alternatively, the main shaft may be directly rotated.

Further, an operating handle 58 is provided on the main shaft 20 on the left side in the figure, and the left side is embodied as a drive side of a reclining device with locks on both sides, but the invention is not limited to this and the right side in the figure is used. A side-to-side rotatable handle may be provided, and the right side may be a driving side and the left side may be a driven side to form a double-sided lock type reclining device.

Although the present invention is optimal as a reclining device for automobile seats, the present invention is not limited to this, and can be applied as a reclining device for various other seats such as trains, airplanes, and ships.

The above-mentioned embodiments are for explaining the present invention and do not limit the present invention in any way.
It goes without saying that the present invention includes all those which are modified or modified within the technical scope of the present invention.

[0052]

As described above, according to the reclining device of the double-sided lock type according to the present invention, the lock mechanism of the driving side and the driven side is constituted to be operable under the rotation of the main shaft, and the operating member is provided. The main shaft of the driving side and the main shaft of the driven side are directly coupled by fixing the extension shaft of the main shaft on one side and the extending end of the main shaft on the other side. That is, the rotational operation force from the operation handle is directly transmitted to the driven-side main shaft via the driving-side main shaft.

Therefore, it is possible to prevent the lock and lock-off operations of the drive side and the driven side from being deviated from each other.
The lock mechanisms operate in synchronization with each other without causing an operation error, and prevent malfunctions and malfunctions of the double-sided lock type reclining device.

An extension shaft connected and fixed to each other,
Since the extended end is formed integrally with the main shaft of the driving side and the main shaft of the driven side, the play in the axial direction can be sufficiently prevented. Therefore, it is possible to prevent the generation of abnormal noise due to backlash, and the comfort of the seated person is secured without giving the seated person a feeling of discomfort or anxiety.

Further, by directly connecting the drive-side main shaft having the operating member and the driven-side main shaft, the transmission means composed of various gears, links and the like can be omitted, so that the number of parts is reduced and the structure is improved. And the reclining device itself can be downsized.

Further, by forming a cut groove extending in the axial direction in the insert piece, even if an error occurs in the seat width direction at the mounting position of the base plate on the driving side and the driven side, the spring pin can be inserted into the cutting groove. The error can be sufficiently absorbed by the insertion position. Therefore, mounting of the extension shaft, the extension end itself and the base plate does not require so high accuracy, and the molding process of each member and the mounting process to each side of the sheet can be easily performed. It can be improved.

If a cut groove into which the spring pin can be fitted is formed in the insert piece and the insert piece, the cut groove, and the like have sufficient lengths, the width dimension between the driving side and the driven side can be adjusted within a certain range. It can be adjusted and set freely. That is, the width of the seat to be mounted is not limited to a constant width. Therefore, it can be mounted on various seats, and a double-sided lock type reclining device having excellent versatility can be configured.

Further, if a pair of screws and female screws that can be screwed into each other are formed on the outer peripheral surface of the insertion piece and the inner peripheral surface of the hollow portion, respectively, in addition to preventing the spring pin from shifting in the rotational direction, When the male screw and the female screw are screwed together, the displacement of the extension shaft and the extension end in the axial direction and the orthogonal direction is reliably prevented.

Therefore, there is no play between the extension axis and the extension end in the axial direction and the orthogonal direction, and from this point as well, the generation of abnormal noise due to the play can be prevented more reliably.

[Brief description of drawings]

FIG. 1 is a schematic vertical cross-sectional view of a partially broken double-sided lock type reclining device according to the present invention.

FIG. 2 is a schematic perspective view of a partially broken double sided lock type reclining device.

[Explanation of symbols]

 10 Double-sided lock type reclining device 12,13 Base plate 16,17 Arm plate 20,21 Spindle 50,51 Lock mechanism 58 Operation handle (operation member) 64 Extension shaft 66 Extension end 68 Hollow part 70 Through hole 72 Insertion piece 74 Cut Groove 76 Spring pin (fixing member)

Claims (5)

[Claims] 1. A base plate and an arm plate, which are swingably connected by a main shaft, are respectively arranged on the left and right sides of a seat, and a lock mechanism for restricting the swing of the arm plate with respect to the base plate is provided on the left and right main shafts. Correspondingly, it is configured so that it can operate under the rotation of the left and right spindles, and by the provision of an integrally rotatable operating member, one side spindle that is the driving side and another side spindle that is the driven side One of the main shafts is integrally formed with an extension shaft extending to the opposite side along the axis, and the other main shaft is integrally formed with an extension end extending to the opposite side. , The extension shaft and the extension end are connected and fixed by the fixing member, the drive side main shaft and the driven side main shaft are directly and integrally rotatably connected on both sides. Click-type reclining device. 2. A hollow portion having a through hole penetrating in a direction orthogonal to the axis is provided at one of the extension end and the extension shaft, and has a kerf aligned with the through hole of the hollow portion. Insertable insert piece is provided on the other end of extension end and extension shaft, fixing member is spring pin, insert piece insert into hollow part, and aligned through hole, continuation of spring pin to kerf 2. The double-sided lock type reclining device according to claim 1, wherein the main shaft of the driving side and the main shaft of the driven side are connected so as to be interlocked with each other by manual insertion. 3. The double-sided lock type reclining device according to claim 2, wherein the cut groove of the insert piece is formed so as to extend in the axial direction. 4. A double-sided lock-type reclining device according to claim 2, wherein a pair of screws and female screws that can be screwed into each other are formed on the outer peripheral surface of the insertion piece and the inner peripheral surface of the hollow portion, respectively. .. 5. A base plate and an arm plate, which are swingably connected by a main shaft, are respectively arranged on the left and right sides of the seat, and a lock mechanism for restricting the swing of the arm plate with respect to the base plate is provided on the left and right main shafts. Correspondingly, it is configured so that it can operate under the rotation of the left and right main shafts respectively, and the operating member is integrally rotatably provided on the main shaft on either the left or right side of the seat as the driving side, and the other side becomes the driven side. A double-sided lock type reclining device in which a side main shaft is directly connected to a drive side main shaft and is integrally and rotatably fixed by a fixing member.