JPH06217838A - Seat reclining device - Google Patents

Abstract

PURPOSE:To use is common each constituting parts of a first and a second reclining mechanisms. CONSTITUTION:A first reclining mechanism 7 of one side of a seat cushion 1 and a seat back 4 is arranged in the outside of a lower arm 2 and an upper arm 5, and a second reclining mechanism 8 of the other side of the seat cushion 1 and the seat back 4 is arranged in the inside of a lower arm 3 and an upper arm 4, and as for each constituting parts of a first and a second reclining mechanisms 7, 8, those of the same shape are used.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat reclining device in which reclining mechanisms are arranged on both sides of a seat cushion and a seat back.

[0003]

2. Description of the Related Art Conventionally, as a seat reclining device of this type, a device disclosed in Japanese Utility Model Laid-Open No. 58-93254 is known. This consists of a lower arm fixedly arranged on both sides of the seat cushion, an upper arm rotatably supported by the lower arm and fixedly arranged on both sides of the seat back, and a lower arm on one side of the seat cushion and an upper arm on one side of the seat back. A first reclining mechanism disposed between the lower arm and the outer arm between the lower arm and the upper arm, and a first reclining mechanism disposed outside the lower arm and the upper arm between the lower arm on the other side of the seat cushion and the upper arm on the other side of the seat back and interlocking with the first reclining mechanism. Having two reclining mechanisms, the first
The operation of the operation lever linked to the reclining mechanism and the second reclining mechanism actuates the first reclining mechanism and the second reclining mechanism, whereby the inclination angle of the seat back with respect to the seat cushion can be adjusted.

[0004]

However, in the above-mentioned conventional device, since the first and second reclining mechanisms are both arranged outside the lower arm and the upper arm,
Since the components of the first and second reclining mechanisms have a line-symmetrical shape, some components of the first and second reclining mechanisms have the same function but cannot be shared. There is a risk of causing assembly errors and cost up.

Therefore, according to the present invention, it is possible to share the respective components of the first and second reclining mechanisms.
This is a technical issue.

[0006]

[Constitution of the invention]

[0007]

The technical means taken in order to solve the above technical problems in the present invention is a lower arm fixedly arranged on both sides of a seat cushion, and rotatably supported by the lower arm. An upper arm fixedly arranged on both sides of the seat back, a first reclining mechanism arranged outside the lower arm and the upper arm between the lower arm on the one side of the seat cushion and the upper arm on the one side of the seat back, and A second reclining mechanism is provided between the lower arm on the other side of the seat cushion and the upper arm on the other side of the seat back and is arranged inside the lower arm and the upper arm and is interlocked with the first reclining mechanism.

[0008]

According to the above technical means, each component of the first and second reclining mechanisms has the same shape. Therefore, the components of the first and second reclining mechanisms are made common.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a pair of lower arms 2 and 3 fixed to both sides of a seat cushion 1 constituting a seat mounted on a vehicle is provided with a seat back 4 constituting the seat. A pair of upper arms 5 and 6 fixed to both sides are rotatably supported. The lower arm 2 is provided between the lower arm 2 and the upper arm 5 outside the vehicle compartment.
And the first reclining mechanism 7 inside the upper arm 5.
The second reclining mechanism 8 is arranged outside the lower arm 3 and the upper arm 6 between the lower arm 3 and the upper arm 6 on the vehicle interior side.

The first reclining mechanism 7 will be described.

As shown in FIGS. 2 and 3, a hinge pin 71 is fixedly supported by the lower arm 2, and an upper arm 5 that rotates with respect to the lower arm 2 is rotatably supported by the hinge pin 71. . A tooth portion 5 a is formed on the upper arm 5. A pole 72 is rotatably supported by a pin 73 on the lower arm 2. The pole 72 is formed with a tooth portion 72a that meshes with the tooth portion 5a of the upper arm 5. Further, a cam surface 72b is formed on the back surface of the tooth portion 72a, and the pin 72 is formed on the side surface.
c is planted. The meshing portion between the tooth portion 5a of the upper arm 5 and the tooth portion 72a of the pole 72 is clamped by the lower plate 2 and the sub plate 75 fixed to the lower arm 2 by the hinge pin 71, the pin 73, and the pin 74, and the meshing shift occurs. Is prevented, which allows the tooth 5
The meshing of a and the tooth portion 72a is guaranteed. A release lever 76 is rotatably supported on the hinge pin 71. The release lever 76 has a pin 72 of the pole 72.
There is formed a cam slot 76a through which c is inserted, and
A pin 77a that supports a roller 77 that presses the cam surface 72b of the pole 72 is planted. Rayris lever 72
The rotation of the pole 72 causes the pole 72 to rotate in the direction in which the tooth portion 72a and the tooth portion 5a engage with each other due to the insertion positional relationship between the cam slot 76a and the pin 72c, and the roller 77 is pressed against the cam surface 72b. Therefore, the toothed portion 72a is engaged with the toothed portion 5a, and the rotation of the upper arm 5 with respect to the lower arm 2 is restricted to be in a locked state. Tooth 5a
When the roller arm 77 is rotated in the disengagement direction and the roller 77 is disengaged from the cam surface 72b, the engagement between the tooth portion 72a and the tooth portion 5a is released, and the upper arm 5 is rotated with respect to the lower arm 2. Is in the unlocked state.
An operation lever 78 is rotatably supported on the hinge pin 71, and a pin 77a is connected to the operation lever 78. The operation lever 78 is a spring 78a stretched between the operation lever 78 and the lower arm 2. The roller 77 is constantly urged to rotate in the direction in which it is pressed by the cam surface 72b under the urging force of. A spiral spring 79, one end of which is locked to the hinge pin 71 and the other end of which is locked to the upper arm 5 via the pin 7b, is wound around the hinge pin 71. Accordingly, it is constantly urged to rotate counterclockwise as shown in FIG.

These upper arm 5 and sub-plate 7
5, the release lever 76 and the operating lever 78 are arranged in the order of the upper arm 5, the sub plate 75, and the release lever 76 on the vehicle interior side with the lower arm 2 as a reference, and the operation lever 78 is arranged on the outside of the vehicle interior. . The pin 77a is inserted through the arc-shaped elongated hole 2a centered on the hinge pin 71 formed on the lower arm 2 and the operating lever 78 is inserted.
And the release lever 76 are connected.

The second reclining mechanism 8 will be described.

As shown in FIGS. 2 and 4, a hinge pin 81 is fixedly supported by the lower arm 3, and an upper arm 6 which rotates with respect to the lower arm 3 is rotatably supported by the hinge pin 81. . A tooth portion 6 a is formed on the upper arm 6. A pole 82 is rotatably supported by a pin 83 on the lower arm 3. The pole 82 is formed with a tooth portion 82a that meshes with the tooth portion 6a of the upper arm 6. A cam surface 82b is formed on the back surface of the tooth portion 82a, and a pin 82 is formed on the side surface.
c is planted. The meshing portion between the tooth portion 6a of the upper arm 6 and the tooth portion 82a of the pole 82 is clamped by the lower arm 3 by the sub plate 85 fixed to the lower arm 3 by the hinge pins 81, 83 and 84, and the meshing shift occurs. Is prevented, which results in the teeth 6
The meshing of a with the tooth portion 82a is guaranteed. A release lever 86 is rotatably supported on the hinge pin 81. This release lever 86 has a pin 82 of a pole 82.
There is formed a cam long hole 86a through which c is inserted, and
A pin 87a that supports a roller 87 that presses the cam surface 82b of the pole 82 is planted. Ray Liz lever 82
The rotation of the cam causes the pawl 82 to rotate in the direction in which the tooth portion 82a and the tooth portion 6a are engaged with each other and the roller 87 is pressed against the cam surface 82b due to the insertion positional relationship between the cam slot 86a and the pin 82c. Therefore, the toothed portion 82a is engaged with the toothed portion 6a to be in a locked state in which the rotation of the upper arm 6 with respect to the lower arm 3 is restricted. Tooth 6a
When the roller arm 87 is rotated in the disengagement direction and the roller 87 is disengaged from the cam surface 82b, the engagement between the tooth portion 82a and the tooth portion 6a is released, and the upper arm 6 is rotated with respect to the lower arm 3. Is in the unlocked state.
An interlocking lever 88 is rotatably supported on the hinge pin 81, and a pin 87a is connected to the interlocking lever 88. The interlocking lever 88 is a spring 88a stretched between the interlocking lever 88 and the lower arm 3. The roller 87 is constantly urged to rotate in the direction in which the roller 87 is pressed by the cam surface 82b. A spiral spring 89, one end of which is locked to the hinge pin 81 and the other end of which is locked to the upper arm 6 via the pin 6b, is wound around the hinge pin 81, and the upper arm 6 is biased by the spiral spring 89. Accordingly, it is constantly urged to rotate counterclockwise as shown in FIG.

These upper arm 6 and sub plate 8
5, the release lever 86 and the interlocking lever 88 are arranged in the order of the upper arm 6, the sub plate 85, and the release lever 86 on the vehicle interior side with respect to the lower arm 3, and the operation lever 88 is arranged on the outside of the vehicle interior. . The pin 87a is inserted through the arc-shaped elongated hole 3a centered on the hinge pin 81 formed on the lower arm 3 and the interlocking lever 88 is formed.
And the release lever 86 are connected.

The first reclining mechanism 7 and the second reclining mechanism 8 are attached to the release lever 76 by a bracket 9.
and the bracket 9 is linked to the interlocking lever 78.
It is interlocked by an interlocking pipe 9 which is rotatably supported by hinge pins 71 and 81 linked through b.

Next, the operation will be described.

FIG. 2 shows a normal state in which the upper arm 5,
6 is locked to the lower arms 2 and 3 by the engagement of the tooth portions 72a and 82a of the poles 72 and 82 with the tooth portions 5a and 6a of the upper arms 5 and 6, respectively. In this state, move the operating lever 78 to the springs 78a and 88a.
By rotating the pin 77a against the urging force of the pin 77a.
The release lever 76 is rotated via the release lever 76 to release the pressing of the roller 77 against the cam surface 72b, and the pole 72 is rotated due to the positional relationship between the pin 72c and the cam elongated hole 76a, and the release lever 76 is rotated. Through the bracket 9a, the interlocking pipe 9 and the bracket 9b.
And the interlocking lever 88 moves against the urging force of the spring 88a together with the release lever 86 via the pin 87a to release the pressing of the roller 87 on the cam surface 82b and the pin 82c to the cam elongated hole 86a. The pole 82 rotates depending on the insertion positional relationship. As a result, the poles 72, 8
2 teeth 72a, 82a and upper arms 5, 6 teeth 5
The engagement with a and 6a is released, and the locking between the upper arms 5 and 6 and the lower arms 2 and 3 is released. As a result,
The upper arms 5 and 6 are rotated with respect to the lower arms 2 and 3 by receiving the urging force of the springs 79 and 89. As a result, the seat back 4 is tilted forward with respect to the seat cushion 1 and the rotational operation of the operating lever 78 is released to release the teeth 72a, 82a of the poles 72, 82 and the teeth 5a, 6a of the upper arms 5, 6. Is engaged again to lock the upper arms 5 and 6 and the lower arms 2 and 3, whereby the inclination angle of the seat back 4 with respect to the seat cushion 1 is adjusted.

As described above, the first reclining mechanism 7 is arranged inside the vehicle interior of the lower arm 2 and the upper arm 5, and the second reclining mechanism 8 is arranged outside the vehicle interior of the lower arm 3 and the upper arm 6. In particular, the poles 72, 82 and the release levers 76, 86 to which various processings are applied can have the same shape. As a result, the poles 72, 82 and the release levers 76, 86 are moved to the first and second reclining mechanisms 7, 8
Can be standardized, and assembly mistakes and cost up can be reduced. Further, the lower arms 2 and 3 which are more rigid than the sub plates 75 and 85 are arranged outside the vehicle compartment of the first and second reclining mechanisms 7 and 8. As a result, the teeth 5a of the upper arms 5 and 6 against the load applied to the seat back 4 when the occupant gets on and off, etc.
6a and the tooth portions 72a, 82a of the poles 72, 82 are effectively prevented from being disengaged, and the rigidity of the first and second reclining mechanisms 5, 6 with respect to the load applied from outside the vehicle compartment is both improved.

[0021]

According to the present invention, the first reclining mechanism on one side of the seat cushion and the seat back is arranged outside the lower arm and the upper arm, and the second reclining mechanism on the other side of the seat cushion and the seat back is arranged on the lower arm and the lower arm. Since the components are arranged inside the upper arm, the components of the first and second reclining mechanisms have the same shape, and the components of the first and second reclining mechanisms can be shared. As a result, it is possible to reduce the mistakes in assembling each component and the cost up.

[Brief description of drawings]

FIG. 1 is a perspective view of a seat that employs a seat reclining device according to the present invention.

FIG. 2 is a plan sectional view of a seat reclining device according to the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a view on arrow B in FIG.

[Explanation of symbols]

 1 Seat cushion 4 Seat back 7 1st reclining mechanism 8 2nd reclining mechanism 2,3 Lower arm 5,6 Upper arm

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazushige Miyagi 3 Aisin Light Metal Co., Ltd., 12 Noe, Nago, Shinminato City, Toyama Prefecture

Claims (1)

[Claims] 1. A lower arm fixedly arranged on both sides of a seat cushion, an upper arm rotatably supported by the lower arm and fixedly arranged on both sides of the seat back, the lower arm on one side of the seat cushion and the seat back. A first reclining mechanism arranged between the lower arm and the upper arm on one side and outside the upper arm, and the lower arm and the lower arm on the other side of the seat cushion and the upper arm on the other side of the seat back and A seat reclining device having a second reclining mechanism arranged inside the upper arm and interlocking with the first reclining mechanism.