JPH07124028A - Reclining device - Google Patents

Abstract

PURPOSE:To simplify the structure, by providing poles engaging or disengaging a ratchet so as to freely slide in the opening formed in a lower arm and providing a cam contacting the poles or separating therefrom at the other side face of the lower arm and connecting operating members thereto. CONSTITUTION:A pair of poles 91 are supported in a pair of openings 23 of a lower arm 2 so as to freely slide. When an operating lever is rotated clockwise, a cam 92 and a release plate 93 are rotated through a rotary shaft 94 and the cam 92 and the pole 91 are released, and at the same time, the poles 91 slide by the cam action of the long holes 93a of the release lever 93 and the pins 91c of the poles 91, and the external gears 91a of the poles 91 are disengaded from the inner gears 51 of the ratchet 5. As a result, the ratchet 5 is allowed to rotate against the lower arm 2. In this way, the pole 91, the cam 92, and the release plate 93 approach one another and also the lower arm 2 and the ratchet 5 approach each other and hence, the connecting structure is simplified.

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 reclining device.

[0003]

2. Description of the Related Art Conventionally, as this type of reclining device, the one disclosed in Japanese Utility Model Laid-Open No. 1-169149 is known. This includes a lower arm, a ratchet rotatable with respect to the lower arm, a pole slidably supported by the lower arm and engaged with and disengaged from the ratchet by a sliding motion, and a pole rotatably supported by the lower arm by a rotating motion. A cam member which is brought into contact with or released from the pawl and an operating member which is linked to the pawl and the cam member, wherein the pawl and the cam member are brought into contact with each other by operating the operating member, and the pawl and the ratchet are connected. The engagement of the ratchet restricts the rotation of the ratchet with respect to the lower arm, and the pawl and the cam member are released from contact with each other by operating the operating member, and the engagement of the pole and the ratchet is released, whereby the ratchet rotates with respect to the lower arm. Was acceptable.

[0004]

In the above-mentioned conventional apparatus, since the pole must be capable of meshing with the ratchet and supported by the lower arm, the pole is arranged between the ratchet and the lower arm. The cam member that can come into contact with is also arranged between the ratchet and the lower arm. This arrangement is ideal in terms of strength because the engagement between the ratchet and the pole and the contact between the pole and the cam member are on the same plane with respect to the axial direction, but the lower arm of the ratchet is also used. However, the supporting structure for the shaft and the linking structure between the pole and cam member and the operating member are complicated.

Therefore, it is a technical object of the present invention to provide a reclining device having a simple structure.

[0006]

[Constitution of the invention]

[0007]

The technical means taken in the present invention to solve the above-mentioned technical problems include the lower arm and a hinge member arranged on one side of the lower arm and fixed to the lower arm. A ratchet rotatably supported by a lower arm, an opening formed in the lower arm, a pole slidably arranged in the opening and meshed with and disengaged from the ratchet by a sliding operation, A cam member that is disposed on the other side surface of the lower arm and is rotatably supported by the lower arm and that abuts and releases the contact with the pawl by a rotating operation; and a cam member that is disposed on the other side surface of the lower arm and is attached to the lower arm. The operation member is rotatably supported and is linked to the pawl and the cam member.

[0008]

According to the above technical means, the pole and the cam member are exposed on the other side surface side of the lower arm on which the operating member is arranged, and the ratchet exists on the one side surface side of the lower arm. Therefore, the pole and cam members are close to the operating member, and the lower arm and the ratchet are close to each other. As a result, the structure for supporting the ratchet on the lower arm and the structure for linking the pawl / cam member and the operating member can be simplified.

[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 FIG. 1, lower arms 2 and 3 are fixed to the rear sides of the seat cushion 1, and ratchets 5 and 6 are fixed to the lower sides of the seat back 4. The lower arms 2 and 3 and the ratchets 5 and 6 are rotatably connected to the lower arms 2 and 3 via bushes 7 and 8 to be described later, respectively. , 3 and the ratchets 5 and 6 are lower arms 2 of the ratchets 5 and 6.
3 are associated with each other by mechanisms 9 and 10 which will be described later and which make the rotation with respect to 3 a restricted state or a permitted state.

The mechanism 9 will be described.

As shown in FIGS. 2-4, the mechanism 9
Includes a pair of pawls 91, a cam member 92, and a release plate 93.

The bush 7 has a cylindrical shape having a through hole 71, and is inserted into the through hole 21 formed in the lower arm 2 so as to stand on one side surface 22 of the lower arm 2. It is fixed by welding or the like. The ratchet 5 is arranged on one side 22 side of the lower arm 2 and the bush 7
Is rotatably supported by being inserted into the outer periphery of the inner peripheral surface of the inner peripheral surface of the bush 7, and the inner tooth 51 is formed halfway around the bush 7.
A pair of openings 23 extending in the radial direction are formed in the lower arm 2 so as to be symmetrical with respect to the bush 7.
The pair of poles 91 are slidably supported in the openings 23 along the side walls of the openings 23, and have external teeth 91a on one end surface orthogonal to the sliding direction and the sliding direction on the other end surface. Abutting surfaces 91b that are inclined with respect to each other are formed, and further, pins 91c are formed on the side surfaces by half blanking. A rotating shaft 94 is inserted into the through hole 71 and rotatably supported in the bush 71, and both ends of the rotating shaft 94 extend outward from the bush 71. The cam member 92 has a diamond shape in which the contact portion 92a is formed, is arranged on the other side surface 23 side of the lower arm 2, and is fixed to one end of the rotary shaft 94 so as to rotate integrally. The release plate 93 is arranged on the other side surface 23 side of the lower arm 2 and is fixed to one end of the rotating shaft 94 so as to rotate integrally. The release plate 93 is formed with a pair of cam elongated holes 93a.

In the pole 9 of the reclining mechanism 9 constructed as described above, the outer teeth 91a can mesh with the inner teeth 51 of the ratchet 5 arranged on the other side surface 22 side of the lower arm 2 within the thickness thereof, and the contact surface. 91 b is arranged in the opening 23 so as to be able to come into contact with the contact portion 92 a of the cam member 92.
The lower arm 2 is formed with a throttle portion 2a which is displaced in the thickness direction, and the opening 23 is formed in a connecting portion 2c between the throttle portion 2a and the main body portion 2b, and the cam member 9 is formed.
The reference numeral 2 is located in the throttle portion 2a and is arranged on the same plane as the main body portion 2b. As a result, the thickness of the pole 91 is suppressed to the minimum, and the axial thickness of the entire device is suppressed to be small.

An operating lever 95 is fixed to the other end of the rotary shaft 94 so as to rotate integrally therewith.

A spring 96 is provided between the operating lever 95 and the lower arm 2, and the operating lever 95 is provided.
The cam member 9 receives the biasing force of the spring 96 so that the outer teeth 91a of the pole 91 and the inner teeth 51 of the ratchet 5 mesh with each other and maintain the meshing of the outer teeth 91a and the inner teeth 51.
The second abutting portion 92a and the abutting surface 91b of the pawl 91 are abutted against each other so that the sliding movement of the pawl 91 is regulated so as to be rotationally biased in the other direction. Incidentally, without providing the operation lever 95,
The release plate 93 may be directly operated by a cable or the like. In this case, the rotary shaft 94 does not necessarily have to rotate together with the cam member 92 and the release plate 93.

Around the bush 7, there is provided a spiral spring 11 having one end locked to the bush 7 and the other end locked to the ratchet 5. The spiral spring 11 is provided with the outer teeth 91a of the pole 91 and the ratchet. In the state in which the meshing of the inner teeth 51 of the gear 5 is released, the ratchet 5 is moved in the other direction with respect to the lower arm 2 (counterclockwise in FIG. 2).
Urge to. A flange portion 93b is formed on the release plate 93, and the release plate 93 is connected to the release plate of the mechanism 10 via the interlocking rod 12 connected to the flange portion 93b. Since the structure of the mechanism 10 is similar to that of the mechanism 9, the description thereof will be omitted.

Next, the operation will be described.

FIG. 2 shows a state in which the outer teeth 91a of the pole 91 and the inner teeth 51 of the ratchet 5 mesh with each other and the rotation of the upper arm 3 with respect to the lower arm 2 is restricted by the mechanisms 9 and 10.

In this state, when the operating lever 95 is operated against the urging force of the spring 96 to rotate in one direction (clockwise in FIG. 1), the cam member 92 and the release plate are rotated via the rotating shaft 94. 93 rotates. As a result, the contact between the contact portion 92a of the cam member 92 and the contact surface 91a of the pole 91 is released, and the pole 91 becomes slidable, and the cam slot 93a of the release lever 93 and the pin 91c of the pole 91 are released. The cam 91 causes the pole 91 to slide, and the outer teeth 91a of the pole 91 and the ratchet 5
The meshing with the internal teeth 51 of is released. As a result, the mechanism 9 enters a state in which the ratchet 5 is allowed to rotate with respect to the lower arm 2. Since the rotation of the release plate 93 also rotates the release plate of the mechanism 10 via the interlocking rod 12, like the mechanism 9, the mechanism 10 is also in a state of permitting the rotation of the ratchet 5 with respect to the lower arm 2.

With the upper arm 3 allowed to rotate with respect to the lower arm 2, the spring 9 of the operating lever 95 is used.
When the operation against the biasing force of 6 is released, the operation lever 95
Receives the biasing force of the spring 96 and rotates in the other direction, and the cam member 92 and the release plate 9 are rotated via the rotation shaft 94.
3 rotates. As a result, the pawl 91 is slid by the cam action of the cam slot 93a of the release lever 93 and the pin 91c of the pawl 91, and the external teeth 91 of the pawl 91 are moved.
a and the inner teeth 51 of the ratchet 5 are meshed with each other, and the abutting portion 92a of the cam member 92 and the abutting surface 91a of the pawl 91 come into contact with each other so that the sliding motion of the pawl 91 is restricted and the outer teeth 91a and the inner teeth 51. The mesh with is maintained. As a result, the mechanism 9 enters a state of restricting the rotation of the ratchet 5 with respect to the lower arm 2. Since the rotation of the release plate 93 also rotates the release plate of the mechanism 10 via the interlocking rod 12, like the mechanism 9, the mechanism 10 is also in a state of restricting the rotation of the ratchet 5 with respect to the lower arm 2.

As described above, since the pole 91 is arranged in the opening 21 of the lower arm 2, the pole 91 and the cam member 92 are exposed to the other side surface 23 side of the lower arm 2 on which the release plate 93 is arranged. The ratchet 5 is present on the side surface 22 side of the lower arm 2. Therefore, the pole 91, the cam member 92, and the release plate 93 are close to each other, and the lower arm 2 and the ratchet 5 are
And are in close proximity. As a result, the pin 91c formed by half-drawing as the linkage between the pole 91 and the release lever 93 is
A rotating shaft 94 for rotating and supporting each of the cam member 92 and the release plate 93 can be used, and a bush 7 fixed to the lower arm 2 can be used for supporting the lower arm 2 of the ratchet 5, respectively, and the lower arm of the ratchet 5 can be used. The structure for supporting the second member 2 and the structure for linking the pawl 91, the cam member 92, and the release plate 93 are simplified. In particular, the use of the pin 91c and the rotating shaft 94 contributes to further reducing the axial thickness of the entire apparatus, and the use of the bush 7 contributes to stabilizing the rotation of the ratchet 5 with respect to the lower arm 2.

[0023]

According to the present invention, since the pole is arranged in the opening of the lower arm, the pole and the cam member are exposed on the other side surface side of the lower arm on which the operating member is arranged, and the one side surface side of the lower arm is exposed. Means that there is a ratchet. As a result, the pole and cam members and the operating member can be brought close to each other, and the lower arm and the ratchet can be brought close to each other. As a result, the supporting structure of the ratchet to the lower arm and the linking structure between the pole and cam members and the operating member can be simplified. can do.

[Brief description of drawings]

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

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

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

FIG. 4 is an exploded perspective view of FIG.

[Explanation of symbols]

 2 Lower arm 5 Ratchet 23 Opening 91 Pole 92 Cam member 93 Release plate (operating member) 94 Bush (Hinge member)

Claims (1)

[Claims] 1. A lower arm, a ratchet rotatably supported by the lower arm by a hinge member arranged on one side surface side of the lower arm and fixed to the lower arm, an opening formed in the lower arm, and the opening. A pole that is slidably disposed inside and that is meshed with and disengaged from the ratchet by a sliding motion; and a pole that is disposed on the other side surface side of the lower arm and is rotatably supported by the lower arm. A reclining device having a cam member that abuts against and releases a pawl, and an operation member that is disposed on the other side surface side of the lower arm and is rotatably supported by the lower arm and that is linked to the pawl and the cam member.