JPH09313284A - Reclining apparatus for seat of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform unlocking of a reclining apparatus provided on a vehicle body side or a seat cushioning side by operating an operating rod on the seat back side. SOLUTION: A reclining apparatus E for a seat of a vehicle is constitute in such a way that locking condition between an upper tooth 20 and a lower tooth 30 can be unlocked by operating an operating lever 40. In this case, the base part of a link plate 60 is pivoted on a free end side of the operating lever 40 and the base part side of an operational rod 70 being up and down movably arranged on a seat back 83 is pivoted on the free end side of this link plate 60, and in addition, the link plate 60 is always energized on the operating lever 40 side and, by pulling the operational rod 70, the lower tooth 30 is operated through the link plate 60, the operating lever 40 and an operating cam 50 to unlock the locking between the upper tooth 20 and the lower tooth 30.

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 suitable for use in a vehicle in which the luggage space can be expanded by folding the rear seat. The present invention relates to a vehicle seat reclining device capable of adjusting a tilt angle and tilting a seat back forward.

[0002]

2. Description of the Related Art Conventionally, since it is difficult to install the above-described rear seat reclining device on the side of a seat back having a narrow width, it is usually installed on the vehicle body side or the seat cushion side. Further, 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 side of the rear seat.

[0003]

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

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to unlock the reclining device provided on the vehicle body side or the seat cushion side and to operate the operating rod provided on the seat back side. It is an object of the present invention to provide a reclining device for a vehicle seat that can be performed by the above operation.

[0005]

In order to achieve the above object, in a reclining device for a vehicle seat according to a first aspect of 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 part is rotatably supported, and the base side of the lower tooth which can be engaged with and disengaged from the upper part is axially attached to the base plate, and further, an operating lever for operating the lower tooth via an operating cam is attached to the base plate. It is structured such that the locked state between the upper part and the lower tooth can be released by pivotally mounting the actuating lever, and the base of the link plate is pivotally mounted on the free end side of the actuating lever and On the free end side of the plate, the base side of the operating rod, which is arranged to be able to move up and down in the seat back, is pivotally mounted. Further configured to constantly urge the urging means the link plate to the actuating lever side,
The lower tooth is operated by pulling the operation rod via the link plate, the operation lever and the operation cam, and the lock between the upper part and the lower tooth is released.

According to a second aspect of the reclining device for a vehicle seat of the present invention, the urging means is composed of a torsion coil spring, and the coil portion is arranged at a shaft attachment portion between the operating lever and the link plate. One of the legs is locked to the actuating lever, and the other leg is locked to the link plate, so that the actuating lever and the link plate come close to each other via the shaft attachment portion.

In the vehicle seat reclining device according to the third aspect of the present invention, the urging means is constituted by a tension coil spring, and one foot of the urging means is locked to the actuating lever and the other foot is locked to the link plate. However, it is characterized in that the actuating lever and the link plate are made to come close to each other via the shaft attachment portion.

Further, in the vehicle seat reclining device 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 is erected. A holding portion is formed, and a first sliding contact surface is formed on the rear side of the guide hole, the first sliding contact surface capable of sliding contact with the guide member along with the movement of the link plate from the time of locking to the time of unlocking the guide member. A second sliding contact surface is formed on the front side of the hole so as to slidably contact the guide member during the transition from the unlocked state to the forward tilted state and from the forward tilted state to the locked state.

Then, claim 1, claim 2 and claim 3
According to this vehicle seat reclining device, the lock of the reclining device provided on the vehicle body side or the seat cushion side can be unlocked by operating the operation rod provided on the seat back side via the link plate. In addition, the rotation fulcrum of the operation rod that rotates integrally with the seat back by the link plate can be provided near the rotation center of the seat back, and the change in the protrusion amount of the operation knob due to the change in the tilt angle of the seat back is minimized. Can be limited. Further, when the seat back is tilted forward, the protrusion amount of the operation knob can be reduced by pulling the operation rod by the link plate. As a result, the structure can be simplified without impairing the operability of the operation knob, and the cost can be reduced.

Further, according to the reclining device for a vehicle seat of claim 4, the holding portion of the guide hole formed in the link plate can prevent the link plate and the operating rod from swinging left and right when the seat back is erected. At the same time, the rotation fulcrum of the operation rod that rotates integrally with the seat back can be made to coincide with the rotation center of the seat back, whereby the operation of the operation rod can be accurately transmitted to the link plate, and The protrusion amount of the operation knob can be made constant regardless of the inclination angle of the seat back. Furthermore, the second sliding contact surface of the guide hole allows the amount of protrusion of the operation knob to be adjusted by changing the amount of retraction of the operation rod, and the amount of protrusion of the operation rod from the seat back of the operation portion when the seat back is tilted forward. Can be made as small as possible.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIGS.

In the figure, E is a reclining device for a vehicle seat 80, and a base plate 10 fixed to a vehicle body 81 side or a seat cushion 82 side is provided with a shaft for pivoting an upper part seat 20 for mounting a seat back 83. While supporting, the base part side of the lower tooth 30 which can be engaged with and disengaged from the upper part 20 is pivotally attached to the base plate 10, and further, the operating lever 40 for operating the lower tooth 30 via the operating cam 50 is axially attached to the base plate 10, By operating this operating lever 40, the locked state between the upper part 20 and the lower tooth 30 can be released.

The present invention is particularly applicable to the operating lever 4
The base portion of the link plate 60 is pivotally attached to the free end side of 0, and the base portion side of the operating rod 70 that is vertically movable in the seat back 83 is pivotally attached to the free end side of the link plate 60. 60 to actuate lever 40
The link plate 60 is configured to be constantly urged to the side by the urging means 62, and by pulling the operation rod 70,
The lower tooth 30 is actuated via the actuating lever 40 and the actuating cam 50, and the upper tooth 20 and the lower tooth 30 are actuated.
Configured to unlock.

Further, this structure will be described in detail.

1 to 3 relate to a first embodiment of the present invention. A rear seat 80 as a vehicle seat is a vehicle body 81.
The seat cushion 82 is mounted on the side of the seat cushion 82, and the seat back 83 is rotatably supported by a rear portion of the seat cushion 82 via a reclining device E. A luggage compartment space (not shown) is provided. Further, the upper portion of the folded rear seat can also be used as a luggage space by folding the seat back 83 forward.

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

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

The upper part 20 has a seat back 83.
Is attached to a side portion of the toothed portion, and an arcuate tooth portion 22 centered on the upper part attachment shaft 21 and a tooth portion 2 are attached to 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 to the left end of 2 (see FIGS. 1 and 2). Further, a stopper pin 24 is planted in an intermediate portion of the upper part 20, and by bringing the stopper pin 24 into contact with the stoppers 12 and 13 formed on the left and right shoulders of the top surface of the base plate 10, The seat back 83 is restricted from rotating in the forward tilting direction and rotating in the rearward tilting direction. The stopper pin 24 may be integrally formed 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 the tooth portion 2 of the upper part 20 is attached to the upper surface on the free end side.
A tooth portion 32 capable of meshing with 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 actuating lever 40 has a base portion rotatably supported on the base plate 10 by an actuating lever mounting shaft 41, and an actuating cam 50 is integrally fixed coaxially therewith. The operation cam 50 is provided with a cam portion 51 that comes into contact with the cam receiving portion 33 of the lower tooth 30. Also,
The spring locking hole 42 formed in the intermediate portion on the free end side of the actuating lever 40 and the spring locking portion 11 formed in the base plate 10 have both legs 43a and 43b of the tension coil spring 43.
The tension lever springs 43 cause the actuating lever 40 to rotate in the direction in which the cam portion 51 of the actuating cam 50 engages with the cam receiving portion 33 of the lower tooth 30, that is, in the counterclockwise direction in the figure. Is urged to.

The link plate 60 has one end on the other free end of the operating lever 41 and the link plate mounting shaft 6
It is pivotally supported by 1. 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 foot portions 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 that the link plate 60 is always pulled toward the operating lever 40. That is, the link plate 60 is biased so as to rotate clockwise in the figure, and its rotation is restricted by the stopper pin 44 embedded in the operating lever 40. The stopper pin 44 may be integrally formed with the operating lever 40 by embossing or the like.

The operation rod 70 has a hook portion 71 formed on the base portion connected and pivotally supported to a rod connection hole 63 formed on the other end portion of the link plate 60, and an operation portion as an operation portion on the upper portion. The knob 72 is fixed. The operation knob 72 includes a grip portion 72a and a shaft portion 72b,
The grip portion 72a is arranged so as to project 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.
It is slidably inserted in.

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

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

Here, the link plate 60 tries to pull in the operation rod 70 by the biasing force of the coil spring 62, but the shaft portion 72b of the operation knob 72 is restricted by the guide hole 73a of the guide member 73. Therefore, the operation knob 72 is held without being retracted,
a and the guide member 73 are held in a state of having a protrusion amount H so as to have a gap for facilitating grasping of the grip portion 72a during operation, and the operation rod 70 and the link plate 60 are connected. The portion is held near the upper part attachment shaft 21 which is the center of rotation of the seat back. The protrusion amount H may be made constant by providing the operation knob 72 with a step portion that abuts the guide member 73.

From the standing state of the seat back 83, the rear seat 80 can be folded to expand the luggage compartment space,
Alternatively, when the seat back 83 is moved forward as shown in FIG. 4 (b) in order to carry in and carry out luggage from the rear of the rear seat 80, as shown by phantom lines in FIG. 72 is pulled upward against both spring forces of the torsion coil spring 62 and the tension coil spring 43.

Then, as shown in phantom in FIG. 1, the operating lever 40 rotates clockwise through the link plate 60, and the cam portion 51 of the operating cam 50 causes the cam portion 51 of the lower tooth 30 to rotate in accordance with this rotation. It separates from the receiving portion 33. As a result, the lower tooth 30 rotates clockwise in the drawing as shown by the phantom line, the tooth portion 32 of the lower tooth 30 is disengaged from the tooth portion 22 of the upper part 20, and the reclining device E is unlocked.

In this unlocked state, with the operation knob 72 pulled upward, as shown in FIG.
Is largely rotated forward to the forward tilted position where the stopper pin 24 of the upper part 20 contacts the stopper 12 of the base plate 10, and when the operation knob 72 is released,
The actuating lever 40 and the actuating cam 50 try to rotate counterclockwise by the spring force of the tension coil spring 43.

Then, the cam receiving portion 33 of the lower tooth 30 is pressed by the cam portion 51 of the actuating cam 50, and the lower tooth 30 tries to rotate counterclockwise, but its tooth portion 32 is the toothless portion of the upper tooth 20. Since it is in contact with 23, it does not rotate, and the link plate 60 is rotated in the clockwise direction by the spring force of the torsion coil spring 62 until it comes into contact with the stopper pin 44. Returns to the state before the operation, and the forward-tilting operation of the seat back 83 is completed. If the operation knob 72 is provided with a stepped portion so as to come into contact with the guide member 73, it is not necessary to provide the stopper pin 44.

Further, in order to return the seat back 83 to the standing state from the forward tilted state of the seat back 83 shown in FIG. 3, the seat back 83 is rotated upright in the clockwise direction.
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 reached. 32 is automatically meshed with the tooth portion 22 of the upper part 20 by the spring force of the tension coil spring 43, and the seat back 83 can be locked and held in the upright position.

As shown in FIG. 4 (a), when the seat back 83 locked and held at a predetermined standing position is rotated to another standing position as shown in FIG. 4 (c). As described above, the operation knob 72 is pulled to release the meshing between the tooth portion 22 of the upper part 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 that rotates integrally with the seat back 83 and the link plate 60 is near the upper part attachment shaft 21 that is the rotation center of the seat back 83, the inclination angle of the seat back 83 is large. It is possible to minimize the change in the amount of protrusion of the operation knob 72 due to the change in. Further, if the operation knob 72 is provided with a stepped portion so as to contact the guide member 73, the amount of protrusion of the operation knob 72 can be made constant.

FIG. 5 relates to a second embodiment of the present invention,
In the second embodiment, the tension coil spring 62 is used as the biasing means. Both legs 62d and 62e of the tension coil spring 62 are 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, respectively. The tension coil spring 62 causes the link plate 6 to stop.
0 is urged so that it is always drawn to the operating lever 40 side.

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

According to the first and second embodiments described above,
The link plate 60, the operating lever 40, and the operating cam 5 are operated by operating the operating rod 70 provided on the seat back 83 side.
The reclining E provided on the vehicle body 81 side can be unlocked via 0. Further, the rotation fulcrum of the operation rod 70 and the link plate 60 which rotate integrally with the seat back 83 can be provided near the upper part attachment shaft 21 which is the rotation center of the seat back 83, and the seat back 83 can be tilted. The change in the protrusion amount of the operation knob 72 due to the change in the angle can be minimized. Further, when the link plate 60 is tilted forward, the operation amount of the operation knob 72 can be reduced by pulling the operation rod 70 by the link plate 60. As a result, the operation rod 70 can follow the rotation of the seat back 83 and the operation knob 72
The operability is not impaired, the structure is simplified, and the cost can be reduced.

FIGS. 6 to 8 relate to the third embodiment of the present invention, and the link plate 60 in this embodiment includes:
A guide hole 65 is formed in the middle part. In the guide hole 65, a holder plate 66 fixed to the upper part mounting shaft 21, the lower tooth mounting shaft 31, and the operating lever mounting shaft 41 with the upper part 20, the lower tooth 30, the operating lever 40 and the operating cam 50 sandwiched is projected. A guide pin 67 as a guide member is inserted. The guide member 67 is used for the holder plate 60.
May be cut and raised.

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 is erected is formed on the seat back 83 side, and the rear R faces from the holding portion 65a toward the base side. A first sliding contact surface 65b capable of sliding contact with the guide pin 67 as the link plate 60 moves from the locked state to the unlocked state.
Is formed, and the holding portion 65 is further provided on the front F side.
A second sliding contact surface 65c that is slidably contactable with the guide pin 67 is formed from a toward the base side from the unlocked state to the forward tilted state and from the forward tilted state to the locked state.

By holding the guide pin 67 by the holding portion 65a when the seat back 83 is erected,
The position of the link plate 60 in the non-operating state can be made constant, and the link plate 60 and the operating rod 7
0 can be prevented from swinging to the left and right, and the pivotal fulcrum of the operation rod 70 that pivots integrally with the seatback 83 is the upper part attachment shaft 21 that is the pivotal fulcrum of the seatback.
And the amount H of protrusion of the operation knob 72 can be made constant. As a result, the operating rod 70
Can be accurately transmitted to the link plate 60. Further, the operation rod 7 is provided by the second sliding contact surface 65c.
By changing the pull-in amount of 0, as shown in FIG. 8, the protrusion amount h from the top surface of the seat back 83 of the operation knob 72 when the seat back 83 is tilted forward can be adjusted to be as small as possible. As a result, when the seat back 83 is folded forward and folded, the operation knob 72 is prevented from being pulled in and protruding, so that a gap between the seat back 83 and a front seat (not shown) can be narrowed when fully flattened. The operation knob 72 does not get in the way.

Other configurations 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 reclining device for a vehicle seat of claims 1, 2 and 3 of the present invention, the reclining device provided on the vehicle body side or the seat cushion side is unlocked. It can be performed by operating the operation rod provided on the seat back side via the link plate. As a result, the operation rod can follow the rotation of the seat back, 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 claim 4, the guide plate holding portion provided in the link plate can prevent the link plate from swinging left and right when the seat back is erected. The center of rotation of the rod and the center of rotation of the seat back can be made to coincide with each other, so that the operation of the operation rod can be accurately transmitted to the link plate, and the operation knob of the operation knob can be operated regardless of the inclination angle of the seat back. The amount of protrusion can be constant. Further, the second sliding contact surface of the guide hole allows the amount of protrusion of the operating knob to be adjusted by changing the retracted amount of the operating rod, and the protrusion of the operating portion of the operating rod from the seat back when the seat back is tilted forward. The amount can be made as small as possible.

[Brief description of 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 explanatory view showing a main part of the same.

FIG. 3 is an explanatory diagram showing an operating state of the same.

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

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

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

FIG. 7 is an exploded perspective view for explaining the main part of the same.

FIG. 8 is an explanatory diagram showing an operating state of the same.

[Explanation of symbols]

 10 base plate 20 upper parts 30 lower tooth 40 actuating lever 43 tension coil spring 50 actuating cam 60 link plate 62 biasing means (torsion coil spring, tension coil spring) 62a coil part 62b foot part 62c foot part 62d foot part 62e foot part 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

Claims (4)

[Claims] 1. A base plate fixed to a vehicle body side or a seat cushion side rotatably supports an upper part for mounting a seat back, and a base side of a lower tooth which can be engaged with and disengaged from the upper part is the base plate. Further, the operating lever for activating the lower tooth via an operating cam is axially attached to the base plate, and the operating lever is actuated to release the locked state between the upper part and the lower tooth. A reclining device for a vehicle seat, in which a base portion of a link plate is pivotally attached to a free end side of the actuating lever, and a base portion side of an operation rod arranged to be movable up and down in the seat back on a free end side of the link plate. The link plate is always attached to the actuating lever side by the urging means. For a vehicle characterized in that the lower tooth is actuated via a link plate, an actuating lever and an actuating cam by pulling the operation rod, and the lock between the upper part and the lower tooth is released. Seat reclining device. 2. The urging means is composed of a torsion coil spring, and the coil portion is arranged at a shaft attachment portion between an operating lever and a link plate, and one foot portion is used as an operating lever and the other foot is used. 2. The reclining device for a vehicle seat according to claim 1, wherein the portions are respectively locked to the link plates, and the actuating lever and the link plate are brought close to each other via the shaft attachment portions thereof. 3. The urging means is composed of a tension coil spring, and one foot of the urging means is locked to an operating lever and the other foot is locked to a link plate. The reclining device for a vehicle seat according to claim 1, wherein the reclining device is arranged so as to approach via a shaft attachment portion. 4. A guide hole is formed in the link plate, a holding portion for holding a guide member protruding from the base plate side when the seat back is erected 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 capable of sliding contact with the guide member along with the movement of the link plate from the locked state to the unlocked state, and further, in the front side of the guide hole, from the unlocked state to the forward tilted state. The reclining device for a vehicle seat according to claim 1, further comprising: a second sliding contact surface that is slidably contactable with the guide member during a transition from the forward tilted state to the locked state.