JPH0576344U - Seat reclining device - Google Patents

Abstract

(57) [Abstract] [Purpose] To simplify the assembling and to automate the assembling, and to expand the freedom of design. [Structure] A compression spring 50 serving as a biasing means for the operating member 30.
Since it is used, the assembling can be facilitated and the assembling can be automated. Further, since the compression spring 50 can be arranged at a position where it does not interfere with the buckle plate 90, the degree of freedom in design can be increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seat reclining device, and more particularly to a seat reclining device for a vehicle having a latch type locking mechanism.

[0002]

[Prior Art]

 This type of seat reclining device is equipped with a lock mechanism consisting of an upper part pivotally mounted on the base plate on an arm, a lower tooth that can be engaged with and disengaged from the upper part, and an operating member that activates the lower tooth. The actuating member is biased by a tension spring in the direction of engaging the lower tooth with the upper part.

[0003]

[Problems to be solved by the device]

 In the above-mentioned conventional seat reclining device, the tension spring is used in the pulling direction, so that the hook portions at both ends thereof are formed on the actuating member, and the spring engaging portion is formed on the base plate in front of the spring engaging portion. They are locked to the respective parts, and are arranged across the buckle plate for seat belt attachment attached to the seat slide device. For this reason, the tension spring and the buckle plate need to be set in terms of shape, mounting position, etc. so that they do not interfere with each other, which limits the degree of freedom in design.

Further, when the tension spring is assembled, the hook portion is entangled with the hook portion of another tension spring, so that the assembling property is poor, and therefore, the assembling cannot be automated.

The present invention has been made to solve the above-mentioned problems of the prior art. The purpose of the present invention is to facilitate the assembling, to automate the assembling, and to have a degree of freedom in design. It is to provide a seat reclining device capable of expanding the vehicle.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, in the seat reclining device according to claim 1 of the present invention, an upper part bearing pivotally mounted on a base plate and provided on an arm, a lower tooth which can be engaged with and disengaged from this upper part, and a lower tooth which is operated. A seat reclining device in which a lock mechanism including an operating member is mounted on a base plate, wherein the operating member is biased toward a lower tooth side by a compression spring.

Further, in the seat reclining device according to the second aspect, the compression spring is provided between the spring locking portion formed on the actuating member and the spring locking portion formed on the reinforcement plate fixed by being superposed on the base plate. It is characterized by being inserted.

In the seat reclining device of the third aspect, the compression spring includes a spring locking portion formed on the actuating member and a spring locking portion formed on a holder plate fixed to the base plate by sandwiching the lock mechanism. It is characterized by being inserted between them.

[0009]

[Action]

 Unlike the tension spring, the compression spring does not need to be provided with a hook portion, so that it is easy to assemble and the assembly can be automated.

Further, since the compression spring can be arranged behind the buckle plate, the degree of freedom in designing the compression spring can be increased.

[0011]

【Example】

 The present invention will be described below based on the embodiments shown in the drawings.

FIG. 1 is a front explanatory view of a seat reclining device, FIG. 2 is an exploded perspective explanatory view of a compression spring mounting portion, FIG. 3 is a rear explanatory view of FIG. 1, and FIG. 4 is an operational explanatory diagram of a locking mechanism when locked. FIG. 5 is an explanatory diagram of the operation of the lock mechanism when unlocking.

In the figure, E is a seat reclining device, which is an upper part 10 axially mounted on a base plate 40 and provided on an arm 12, a lower tooth 20 detachable from the upper part 10 and an actuating the lower tooth 20. A lock mechanism R including the operating member 30 is mounted on the base plate 40.

The present invention is characterized in that the actuating member 30 is biased by the compression spring 50 in the direction in which the lower tooth 20 is engaged with the upper part 10, and the compression spring 50 is It is characterized in that it is interposed between the spring locking portion 32 formed on the actuating member 30 and the spring locking portion 62 provided on the reinforcing plate 60 fixed to the base plate 40 by superposition.

Next, the structure of the present invention will be described in more detail.

The seat reclining device E is, for example, a base plate 40 (only the outer side is shown) attached to both left and right sides of a seat cushion of a seat, and a seat back attached to the base plate 40 by a first pivot 11. The upper part 10 is integrally fixed to the arm 12 and has an arc-shaped tooth centered on the axial center of the first pivot 11 at its lower edge. The portion 10a is formed.

The lower tooth 20 has a base portion pivotally attached to a base plate 40 by a second pivot 21, and a tooth portion 20a that meshes with the tooth portion 10a of the upper part 10 is formed at an upper edge portion on the free end side. A cam receiving surface 20b, a concave portion 20c, and a convex portion 20d are sequentially formed at the lower edge of the end side from the tip toward the base. The actuating member 30 has a base portion pivotally attached to the base plate 40 by a third pivot 31, and has a free end projecting upward in a bifurcated manner. The right end portion has a cam receiving surface 20b and a convex portion of the lower tooth 20. A cam portion 30b that engages with 20d is formed, and a spring engaging portion 32 for engaging the compression spring 50 is provided at the left end of the free end so as to project.

One end of each of the first, second, and third pivot shafts 11, 21, 31 is connected to the base plate 40 via the reinforcing plate 60, and each other end is connected to the holder plate 70 sandwiching the lock mechanism R. Each is fixed. Further, a spiral spring 13 that urges the arm 12 to rotate counterclockwise is wound around the first pivot 11.

The compression spring 50 is formed in a coil shape, one end of which is connected to the spring locking portion 32 of the actuating member 30, and the other end of which is connected to the spring locking portion 62 of the reinforcing plate 60 which faces the locking portion 32. I have inserted each. The spring locking portion 62 is formed in a rod shape, and is integrally provided on a mounting portion 60a formed by bending the reinforcing plate 60.

The operating lever 80 for operating the operating member 30 is formed by pivotally attaching the base portion of the operating lever 30 to the second pivot 21 protruding from the base plate 40 toward the operating lever 80, and extending the grip portion 80a laterally. One end of a connecting rod 81 is connected and supported by a pin 82 to a free end protruding upward.

A base of a connecting member 83 is pivotally attached to the third pivot 31 protruding from the base plate 40 toward the operation lever 80, and the other end of the connecting rod 81 is connected to the upper free end of the connecting member 83. It is connected and supported by a pin 84. One end of a wire 85 is locked to the lower free end of the connecting member 83, and the other end of the wire 85 passes through a hole 40a formed in the base plate 40 and the locking mechanism on the inner side (not shown). No.). An escape hole 83d is formed on the side of the base of the connecting member 83, and a connecting portion 30d formed by bending the actuating member 30 is loosely fitted in the escape hole 83d. Further, the base plate 40 is formed with an arc-shaped escape hole 40d into which the connecting portion 30d is loosely fitted.

A base of a torsion coil spring 86 is wound around the third pivot 31 protruding from the base of the connecting member 83, one end of which is connected to the connecting portion 30 d of the actuating member 30 and the other end of which is below the connecting member 83. The operation levers 80 are respectively locked to the free ends, and the torsion coil springs 86 bias the operating lever 80 in the direction of arrow A via the connecting member 83 and the connecting rod 81. The rotation of the operation lever 80 in the direction of arrow A is restricted by the stopper 87 provided on the base plate 40.

In FIG. 1, reference numeral 90 is a buckle plate for a seat belt, which is attached to a seat slide device (not shown) and is arranged on the left side of the operating member 30 so as to extend upward across the base plate 40. Has been done.

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

1 and 4 show a state in which the lock mechanism R is locked, and the cam portion 30b of the actuating member 30 is pressed against the cam receiving surface 20b of the lower tooth 20 by the spring force of the compression spring 50. As a result, the lower tooth 20 is rotated clockwise, and its tooth portion 20a meshes with the tooth portion 10a of the upper part tooth 10.

To unlock the locking mechanism R to tilt the seat back, the operation lever 80 is rotated in the direction of arrow B against the spring force of the torsion coil spring 86. Then, the actuating member 30 rotates in the clockwise direction against the spring force of the compression spring 50 via the connecting rod 81 and the connecting member 83. Then, the cam portion 30b of the actuating member 30 separates from the cam receiving surface 20b of the lower tooth 20, and further engages with the convex portion 20d to rotate the lower tooth 20 counterclockwise. As a result, the tooth portions 10a, 20a of the upper part tooth 10 and the lower tooth 20 are disengaged from each other, and the lock is released as shown in FIG. At this point, the lock mechanism on the inner side is also activated by the wire 85 to be in the unlocked state.

As a result, the arm 12 can be rotated about the first pivot 11 to adjust the angle of the seat back, and the seat back can be rotated in the direction biased by the spiral spring 13 and tilted forward. .. The seat back can be locked again by rotating the arm 12 and its detailed description will be omitted.

Here, unlike the conventional tension spring, the compression spring 50 does not have a hook portion, so that the hook portion does not become entangled during assembly. Further, the compression spring 50 is assembled by first compressing the compression spring 50 slightly so as not to interfere with the spring locking portion 32 of the actuating member 30 and inserting the compression spring 50 into the spring locking portion 62 of the reinforcing plate 60, and then expanding it. It can be performed by inserting it into the spring locking portion 32. As a result, the assemblability can be facilitated and the assembling can be automated.

Further, since the compression spring 50 is interposed between the actuating member 30 and the spring locking portions 32 and 62 of the reinforcing plate 60, it is possible to prevent the compression spring 50 from interfering with the buckle plate 90. As a result, the degree of freedom in designing the shape of the compression spring 50 and the like can be expanded.

In this embodiment, one spring engaging portion 62 is provided on the reinforcing plate 60. However, as shown in FIG. 6, the spring engaging portion 62 is formed on the holder plate 70 by bending and is spring engaged. The part 72 may be provided.

Further, the seat reclining device E of the present invention is not limited to the double lock mechanism, but can be applied to the single side lock mechanism.

[0032]

[Effect of the device]

 As described above, according to the present invention, since the compression spring is used as the biasing means of the actuating member, the hook portion is not required unlike the tension spring. As a result, the assembling property can be facilitated and the assembling can be automated.

Further, since the compression spring can be arranged at a position where it does not interfere with the buckle plate, the degree of freedom in design can be increased.

[Brief description of drawings]

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

FIG. 2 is an exploded perspective view of a compression spring mounting portion.

3 is a rear view of FIG. 1. FIG.

FIG. 4 is an explanatory diagram of the operation of the lock mechanism when locked.

FIG. 5 is an operation explanatory view of the lock mechanism at the time of unlocking.

FIG. 6 is a perspective view of a compression spring mounting portion according to another embodiment.

[Explanation of symbols]

 E seat reclining device R lock mechanism 10 upper parts 12 arm 20 lower tooth 30 actuating member 32 spring locking part 40 base plate 50 compression spring 60 reinforcing plate 62 spring locking part 70 holder plate 72 spring locking part 80 operating lever 90 buckle plate

Claims (3)

[Scope of utility model registration request] 1. A seat reclining device having a base plate equipped with a lock mechanism including an upper part shaft pivotally mounted on a base plate and provided on an arm, a lower tooth detachable from the upper part tooth, and an actuating member for operating the lower tooth. The seat reclining device, wherein the actuating member is urged toward the lower tooth side by a compression spring. 2. The compression spring is interposed between a spring locking portion formed on the actuating member and a spring locking portion provided on a reinforcing plate which is fixed by being superposed on the base plate. 1. The seat reclining device according to 1. 3. A compression spring is interposed between a spring locking portion formed on the actuating member and a spring locking portion formed on a holder plate fixed to the base plate by sandwiching a locking mechanism. The seat reclining device according to claim 1.