JP3305572B2 - Reclining device for vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat reclining device, and more particularly to a vehicle seat reclining device which is preferably used for a vehicle capable of expanding a cargo space by folding a rear seat. The present invention relates to a vehicle seat reclining device capable of adjusting an inclination angle and allowing a seat back to be moved forward.

[0002]

2. Description of the Related Art Conventionally, the above-described rear seat reclining device is usually provided on a vehicle body side or a seat cushion side because it is difficult to provide the rear seat reclining device on a narrow seat back side. The unlocking of the reclining device is performed by operating an operation knob provided on the seat back side in consideration of operability from the rear seat rear side.

[0003]

However, in the conventional apparatus described above, the position of the operation knob changes with the rotation of the seat back with respect to the fixed reclining device, so that the operation knob and the reclining mechanism are connected by a flexible wire. However, since the wire is bent in accordance with the movement of the seat back, the operation becomes heavy due to sliding resistance, and the operability is deteriorated. Further, there are problems that the number of parts is large, the structure is complicated, and the cost is high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object of the present invention is to unlock a reclining device provided on a vehicle body side or a seat cushion side by using an operating rod provided on a seat back side. It is an object of the present invention to provide a vehicle seat reclining device which can be performed by the above operation.

[0005]

In order to achieve the above object, in a vehicle seat reclining device according to the present invention, a seat back is mounted on a base plate fixed to a vehicle body side or a seat cushion side. The upper tooth is rotatably supported, and the lower tooth, which can be disengaged from the upper tooth, is pivotally mounted on the base plate.Furthermore, an operating lever for operating the lower tooth via an operating cam is provided on the base plate. The lock state between the upper tooth and the lower tooth can be released by operating the operating lever, and the base of the link plate is axially mounted on the free end side of the operating lever, and The base side of the operation rod, which can be raised and lowered on the seat back, is attached to the free end side of the plate. Further, the Li by a biasing means
Rotate the link plate in the backward tilt direction of the seat back.
The lower tooth is actuated via a link plate, an operating lever and an operating cam by pulling the operating rod, thereby unlocking the upper tooth and the lower tooth. I have.

According to a second aspect of the present invention, the urging means is constituted by a torsion coil spring, and the coil portion is disposed on a shaft attachment portion between the operating lever and the link plate. Lock one foot to the actuating lever and the other foot to the link plate, and rotate the link plate in the backward tilt direction of the seat back.
It is characterized by being urged to turn .

In the reclining device for a vehicle seat according to a third aspect of the present invention, the urging means is constituted by a tension coil spring, and one of the leg portions is engaged with the operating lever, and the other leg portion is linked with the link plate. Stop and link play
The seat back is urged to rotate in the backward tilt direction .

According to a fourth aspect of the present invention, a guide hole is formed in the link plate, and a guide member protruding from the base plate side is held at the seat back side of the guide hole when the seat back stands up. Forming a first sliding contact surface on the rear side of the guide hole, the sliding surface being slidable on the guide member along with the movement of the link plate from locking to unlocking; A second sliding contact surface is formed on the front side of the hole so as to be able to slide on the guide member during the transition from the unlocked state to the forwardly inclined state and from the forwardly inclined state to the locked state.

[0009] Claims 1, 2, and 3
According to the vehicle seat reclining device, the lock of the reclining device provided on the vehicle body side or the seat cushion side can be released by operating the operation rod provided on the seat back side via the link plate. In addition, a rotation fulcrum of the operation rod, which rotates integrally with the seat back by the link plate, can be provided in the vicinity of the center of rotation of the seat back, so that a change in a protrusion amount of the operation knob due to a change in the inclination angle of the seat back is minimized. Can be limited. Further, when the seat back is moved forward, the protrusion of the operation knob can be reduced by the link plate retracting the operation rod. As a result, the structure is simplified without impairing the operability of the operation knob, and the cost can be reduced.

According to the reclining device for a vehicle seat of the present invention, the link plate and the operating rod can be prevented from swaying right and left when the seat back stands up by the holding portion of the guide hole formed in the link plate. At the same time, the rotation fulcrum of the operation rod that rotates integrally with the seat back can be matched with the rotation center of the seat back, whereby the operation of the operation rod can be accurately transmitted to the link plate. Irrespective of the inclination angle of the seat back, the protrusion amount of the operation knob can be made constant. Further, the amount of protrusion of the operation knob can be adjusted by changing the retracted amount of the operation rod by the second sliding contact surface of the guide hole, and the amount of protrusion of the operation portion of the operation rod from the seat back when the seat back is lowered forward. Can be made as small as possible.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS.

In FIG. 1, reference numeral E denotes a reclining device for a vehicle seat 80, which pivotally moves an upper part 20 for mounting a seat back 83 on a base plate 10 fixed to a vehicle body 81 or a seat cushion 82. At the same time, the base side of the lower tooth 30 that can be engaged with and disengaged from the upper tooth 20 is pivotally mounted on the base plate 10, and further, the lower lever 30 is pivotally mounted on the base plate 10 via an operation cam 50. By operating the operating lever 40, the locked state between the upper tooth 20 and the lower tooth 30 can be released.

The present invention particularly relates to the operation lever 4.
0, the base of the link plate 60 is pivotally mounted on the free end side of the link plate 60, and the base of the operation rod 70 which can be moved up and down on the seat back 83 is pivotally mounted on the free end side of the link plate 60. 60 operating lever 40
The urging means 62 is always urged to the side, and the link plate 60 is
The lower tooth 30 is operated via the operation lever 40 and the operation cam 50, and the upper tooth 20 and the lower tooth 30 are operated.
The lock is configured to be unlocked.

Further, this configuration will be described in detail.

FIGS. 1 to 3 relate to a first embodiment of the present invention.
A seat cushion 82 is mounted on the side of the vehicle, and a seat back 83 is supported at the rear of the seat cushion 82 via a reclining device E so as to be able to move up and down. A luggage space (not shown) is provided. The upper portion of the rear seat, which is folded by further folding the seat back 83 forward, can be used as a cargo space.

The reclining device E comprises a base plate 10, an upper tooth 20, a lower tooth 30, an operating lever 40, an operating cam 50, a link plate 60, and an operating rod 70.

In this embodiment, the base plate 10 is fixed to the vehicle body 81 side, and an upper part 20 is rotatably supported on an upper part of the base plate 10 by an upper part mounting shaft 21.

The upper part 20 includes a seat back 83
And a toothed portion 22 having an arc shape centered on an upper part mounting shaft 21 and a toothed portion 2 at the lower edge portion.
A toothless portion 23 having a radius of curvature slightly larger than the radius of curvature of the tooth portion 22 is formed continuously from the left end of the second tooth 2 (see FIGS. 1 and 2). A stopper pin 24 is implanted in an intermediate portion of the upper part 20, and the stopper pin 24 is brought into contact with stoppers 12 and 13 formed on both left and right shoulders of the top surface of the base plate 10, thereby providing The rotation of the seat back 83 in the forward tilt direction and the backward tilt direction is restricted. The stopper pin 24 may be formed integrally with the upper part 20 by embossing or the like.

The lower tooth 30 has a base portion rotatably supported on the base plate 10 by a lower tooth mounting shaft 31, and has a tooth portion 2 of the upper tooth 20 on an upper surface on a free end side.
A tooth portion 32 that can mesh with the second gear 2 is formed. A cam receiving portion 33 is formed on the lower surface of the lower tooth 30 on the free end side.

The operating lever 40 has a base portion rotatably supported on the base plate 10 by an operating lever mounting shaft 41, and an operating cam 50 is integrally fixed coaxially. The operating cam 50 is formed with a cam portion 51 that comes into contact with the cam receiving portion 33 of the lower tooth 30. Also,
A spring engaging hole 42 formed in the intermediate portion on the free end side of the operating lever 40 and a spring engaging portion 11 formed in the base plate 10 have two legs 43a and 43b of the extension coil spring 43.
The operating lever 40 is rotated by the extension coil spring 43 in a direction in which the cam portion 51 of the operating cam 50 is engaged with the cam receiving portion 33 of the lower tooth 30, that is, counterclockwise in the drawing. Is being biased.

The link plate 60 has one end connected to the other free end of the operating lever 40 by the link plate mounting shaft 6.
1, so as to be rotatable. A coil portion 62a of a torsion coil spring 62 as an urging means is wound around the link plate mounting shaft 61, and both legs 62b and 62c of the torsion coil spring 62 are engaged with the operating lever 40 and the link plate 60, respectively. The link plate 60 is urged by the torsion coil spring 62 so as to be constantly drawn to the operation lever 40 side. That is, the link plate 60 in the clockwise direction der
The seat back is biased so as to rotate in the backward tilt direction , and the rotation is regulated by a stopper pin 44 implanted in the operation lever 40. The stopper pin 44 may be formed integrally with the operation lever 40 by embossing or the like.

The operating rod 70 pivotally connects a hook 71 formed at the base to a rod connecting hole 63 formed at the other end of the link plate 60, and has an operating part as an operating part at the top. The knob 72 is fixed. The operation knob 72 includes a grip portion 72a and a shaft portion 72b,
The grip portion 72a is disposed so as to protrude outward from a guide member 73 provided on the top surface of the seat back 83, and the shaft portion 72b is provided with a guide hole 73a formed in the guide member 73.
Is slidably inserted in

Next, the operation of the first embodiment of the present invention will be described.

As shown in FIG. 4A, the seat back 8
When 3 is rotated to the predetermined standing position, as shown in FIG. 1, the reclining device E keeps the locked state. That is, the cam receiving portion 33 of the lower tooth 30
The cam portion 51 of the operation cam 50 is pressed by the spring force of the extension coil spring 43, whereby the lower tooth 30 rotates counterclockwise, and the tooth portion 32 of the lower tooth 30
The seat back 83 is locked at a predetermined standing position by meshing with the 0 tooth portion 22.

Here, the link plate 60 attempts to pull in the operating rod 70 by the urging force of the coil spring 62 so that the shaft 72 b of the operating knob 72 is restricted by the guide hole 73 a of the guide member 73. The operation knob 72 is held without being pulled
a and the guide member 73 are held in a state of having a protruding amount H so as to have a gap for facilitating grasping of the grip portion 72a during operation, and a connection between the operation rod 70 and the link plate 60. The part is held in the vicinity of the upper part attachment shaft 21 which is the center of rotation of the seat back. Note that the operation knob 72 may be provided with a step that contacts the guide member 73 so that the protrusion amount H may be made constant.

From the standing state of the seat back 83, the rear seat 80 is folded to increase the luggage space,
Alternatively, when the seat back 83 is moved forward as shown in FIG. 4B for loading and unloading the luggage from the rear of the rear seat 80, the operation knob is moved as shown by a virtual line in FIG. 72 is pulled upward against both spring forces of the torsion coil spring 62 and the extension coil spring 43.

Then, as indicated by the imaginary line in FIG. 1, the operating lever 40 is rotated clockwise through the link plate 60, and the cam portion 51 of the operating cam 50 is moved along with this rotation to the cam of the lower tooth 30. It detaches from the receiving part 33. As a result, the lower tooth 30 rotates clockwise in the drawing, as shown by the imaginary line, so that the teeth 32 and the teeth 22 of the upper tooth 20 are disengaged, and the reclining device E is unlocked.

In this unlocked state, while pulling the operation knob 72 upward, as shown in FIG.
When the operation knob 72 is released, the lever is pivoted forward to a position where the stopper pin 24 of the upper part 20 comes into contact with the stopper 12 of the base plate 10 and the operation knob 72 is released.
The operation lever 40 is going to rotate in the counterclockwise direction together with the operation cam 50 by the spring force of the extension coil spring 43.

Then, the cam receiving portion 33 of the lower tooth 30 is pressed by the cam portion 51 of the operation cam 50, and the lower tooth 30 attempts to rotate in the counterclockwise direction. The link plate 60 does not rotate because it is in contact with the stopper 23, and is rotated clockwise by the spring force of the torsion coil spring 62 until the link plate 60 contacts the stopper pin 44, thereby pulling the operating rod 70 and pulling the operating knob 72. Returns to the state before the operation, and the forward moving operation of the seat back 83 is completed. If the operation knob 72 is provided with a step so as to abut on the guide member 73, the stopper pin 44 does not need to be provided.

In order to return the seat back 83 to the upright state again from the state in which the seat back 83 is tilted forward as shown in FIG. 3, the seat back 83 is turned clockwise.
Then, when the tooth portion 32 of the lower tooth 30 slides on the toothless portion 23 of the upper tooth 20, and the tooth portion 22 of the upper tooth 20 reaches a position facing the tooth portion 32 of the lower tooth 30, the tooth portion of the lower tooth 30 is moved. 32 automatically meshes with the teeth 22 of the upper part 20 by the spring force of the extension coil spring 43, and the seat back 83 can be locked and held in the upright position.

As shown in FIG. 4A, when the seat back 83 locked and held at a predetermined standing position is rotated to another standing position as shown in FIG. As described above, the operation is performed by pulling the operation knob 72 to release the engagement between the tooth portion 22 of the upper tooth 20 and the tooth portion 32 of the lower tooth 30, and a detailed description thereof will be omitted. Here, since the connecting portion between the operation rod 70 and the link plate 60 that rotate integrally with the seat back 83 is near the upper part mounting shaft 21 that is the center of rotation of the seat back 83, the inclination angle of the seat back 83 , The change in the amount of protrusion of the operation knob 72 can be minimized. In addition, if the operation knob 72 is provided with a step so as to be in contact with the guide member 73, the protrusion amount of the operation knob 72 can be made constant.

FIG. 5 relates to a second embodiment of the present invention.
In the second embodiment, a tension coil spring 62 is used as the urging means. The two leg portions 62d and 62e of the extension coil spring 62 are respectively engaged with a locking hole 45 formed at the intermediate portion of the free end of the operating lever 40 and a locking hole 64 formed at the other end of the link plate 60. The link plate 6 is stopped by the tension coil spring 62.
0 is urged so as to be constantly drawn to the operation lever 40 side.

Other configurations and operations are the same as those of the first embodiment, and a description thereof will be omitted.

According to the first and second embodiments described above,
By operating the operation rod 70 provided on the seat back 83 side, the link plate 60, the operation lever 40 and the operation cam 5 are operated.
The unlocking of the reclining E provided on the vehicle body 81 side can be performed through the zero. In addition, a pivot point of the operation rod 70 and the link plate 60 that rotate integrally with the seat back 83 can be provided in the vicinity of the upper part mounting shaft 21 that is the center of rotation of the seat back 83, and the inclination of the seat back 83 can be increased. A change in the amount of protrusion of the operation knob 72 due to a change in the angle can be minimized. Further, when the operation knob 72 is moved forward, the protrusion of the operation knob 72 can be reduced by the link plate 60 pulling the operation rod 70. This allows the operation rod 70 to follow the rotation of the seat back 83 and the operation knob 72
The structure is simplified and the cost can be reduced without impairing the operability of the device.

FIGS. 6 to 8 relate to a third embodiment of the present invention.
A guide hole 65 is formed at an intermediate portion. The guide hole 65 protrudes from a holder plate 66 fixed to the upper tooth mounting shaft 21, the lower tooth mounting shaft 31, and the operating lever mounting shaft 41 with the upper tooth 20, the lower tooth 30, the operating lever 40 and the operating cam 50 interposed therebetween. A guide pin 67 as a guide member is inserted. The guide member 67 is attached to the holder plate 60.
May be provided.

In the guide hole 65 of the link plate 60, a holding portion 65a for holding the guide pin 67 when the seat back 83 stands up is formed on the seat back 83 side, and the rear R is directed from the holding portion 65a to the base side. A first sliding contact surface 65b that can slide on the guide pin 67 with the movement of the link plate 60 from the time of locking to the time of unlocking;
Are formed, and a holding portion 65 is provided on the front F side.
A second sliding contact surface 65c slidably contacting the guide pin 67 during a transition from the unlocked state to the forwardly inclined state and the transition from the forwardly inclined state to the locked state from a to the base side.

By holding the guide pin 67 by the holding portion 65a when the seat back 83 stands up,
The position of the link plate 60 in the non-operation state can be kept constant, and the link plate 60 and the operation rod 7 can be fixed.
0 can be prevented from swinging left and right, and the pivot shaft of the operation rod 70 that rotates integrally with the seat back 83 is moved to the upper part mounting shaft 21 serving as the pivot shaft of the seat back.
And the protrusion amount H of the operation knob 72 can be made constant. Thereby, the operation rod 70
Can be accurately transmitted to the link plate 60. Further, the operating rod 7 is provided by the second sliding contact surface 65c.
By changing the retracting amount of 0, as shown in FIG. 8, the protrusion amount h of the operation knob 72 from the top surface of the seat back 83 when the seat back 83 is tilted forward can be adjusted to be as small as possible. Thus, when the seat back 83 is folded forward and folded, the operation knob 72 is not pulled out and protruded, so that the gap between the seat back 83 and a front seat (not shown) can be reduced when the seat back 83 is fully flattened. The operation knob 72 does not interfere.

Other structures and operations are the same as those shown in the first embodiment, and the description thereof will be omitted.

[0039]

As described above, according to the vehicle seat reclining device of the first, second and third aspects of the present invention, the operating rod provided on the seat back side.
Operation of the link plate, operating lever and operating cam
Unlocking of the reclining device provided on the vehicle body side via the
Removal can be performed. Also, when moving forward,
Link plate is operated by retracting the operating rod
The protrusion amount of the knob can be reduced. By this
And the operating rod can follow the rotation of the seat back
The structure is simple without impairing the operability of the operation knob.
Therefore, the cost can be reduced .

According to the reclining device for a vehicle seat of the present invention, the link plate can be prevented from swaying right and left when the seat back stands up by the holding portion of the guide hole provided in the link plate. The center of rotation of the rod and the center of rotation of the seat back can be made to coincide with each other, whereby the operation of the operating rod can be accurately transmitted to the link plate. The amount of protrusion can be made constant. Further, by changing the retracted amount of the operation rod by the second sliding contact surface of the guide hole, the protrusion amount of the operation knob can be adjusted, and the operation portion of the operation rod protrudes from the seat back when the seat back is lowered forward. The amount can be as small as possible.

[Brief description of the drawings]

FIG. 1 is an explanatory front view of a reclining device for a vehicle seat according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a main part of the same.

FIG. 3 is an explanatory diagram showing an operating state.

FIG. 4 is an explanatory front view showing an operating state of the vehicle seat according to the present invention.

FIG. 5 is an explanatory front view of a vehicle seat reclining device according to a second embodiment of the present invention.

FIG. 6 is an explanatory front view of a reclining device for a vehicle seat according to a third embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a main part of the same.

FIG. 8 is an explanatory diagram showing an operating state.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 base plate 20 upper teeth 30 lower tooth 40 operating lever 43 extension coil spring 50 operation cam 60 link plate 62 biasing means (torsion coil spring, extension coil spring) 62a coil section 62b foot section 62c foot section 62d foot section 62e foot section 65 guide Hole 65a Holding portion 65b First sliding contact surface 65c Second sliding contact surface 66 Holder plate 67 Guide member (guide pin) 70 Operating rod 72 Operating knob 80 Vehicle seat (rear seat) 81 Body 82 Seat cushion 83 Seat back E Reclining device

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) A47C 1/03 B60N 2/30-2/36

Claims (4)

(57) [Claims] 1. A base plate fixed to a vehicle body side or a seat cushion side rotatably supports an upper part to which a seat back is attached, and a base side of a lower tooth detachable from the upper part to the base plate. And an operating lever that operates the lower tooth via an operating cam is axially mounted on the base plate, and by operating this operating lever, the locked state between the upper tooth and the lower tooth can be released. A reclining device for a vehicle seat, wherein a base portion of a link plate is axially mounted on a free end side of the operating lever, and a base portion side of an operation rod disposed on the free end side of the link plate so as to be able to move up and down on the seat back. , And further, the link plate is
The seat back is always biased so as to rotate in the backward direction, and by pulling the operating rod, the lower tooth is operated via the link plate, the operating lever and the operating cam, and the upper tooth and the lower tooth are connected to each other. A reclining device for a vehicle seat, wherein a lock is released. 2. The urging means is constituted by a torsion coil spring, and its coil portion is arranged on a shaft attachment portion between an operation lever and a link plate, and one foot portion is used as an operation lever, and the other foot is used. Parts are locked to the link plate , and the link plate rotates in the backward tilt direction of the seat back.
The reclining device for a vehicle seat according to claim 1, wherein the reclining device is urged to perform the operation. 3. The urging means is constituted by a tension coil spring, one of which is engaged with an operating lever and the other of which is engaged with a link plate.
2. The vehicle seat reclining device according to claim 1, wherein the vehicle seat is biased so as to rotate in the backward tilt direction . 4. A guide hole is formed in the link plate, a holding portion for holding a guide member projecting from the base plate side when the seat back stands up is formed on the seat back side of the guide hole, and a rear portion of the guide hole is formed. A first sliding contact surface that can slide on the guide member along with the movement of the link plate from the time of locking to the time of unlocking; 2. The vehicle seat reclining device according to claim 1, wherein a second sliding contact surface is formed which is slidable on the guide member during a transition from the forward tilted state to the locked state.