JP2653619B2 - Reclining device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclining device for supporting a seat back so as to be adjustable in tilt.

[0002]

2. Description of the Related Art A conventional reclining device is disclosed in, for example, FIGS. 3 and 4 and Japanese Patent Publication No. 52-1729.
Japanese Patent Publication No. 7 (JP-A) No. 7 shows each of them. That is,
In FIG. 3, an arm member 2 to be fixed to a seat back is pivotally attached to a base member 1 to be fixed to a seat cushion, and an upper tooth portion 3 is formed at a lower end edge of the arm member 2. The lower tooth member 4 provided on the member 1 is meshed with the upper tooth portion 3 to restrain the seat back from swinging at a desired tilt angle.

In the apparatus shown in FIG. 4 and the publication, the planetary gear mechanism is operated by rotating the adjustment dial 5,
Alternatively, the tilting angle of the seat back is continuously adjusted via the arm member 2 by rotating the screw member forward and reverse and moving the nut member in the screw axis direction.

[0004]

However, in such a conventional reclining device, in the former,
Since the tilt of the seat back cannot be adjusted at a fine pitch equal to or smaller than the tooth pitch of the upper tooth portion 3, the seat back may not be adjusted to the tilt angle most suitable for the occupant, which is not convenient. Was.

In the latter case, it is necessary to rotate the adjusting dial 5 and the screw member many times in order to greatly adjust the tilt angle of the seat back, which requires a lot of time for the adjusting operation, which is also inconvenient. There was a problem.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a reclining device which can improve usability.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a reclining device which supports a seat back so as to be capable of adjusting the tilt thereof, wherein the tilt angle of the seat back can be roughly adjusted. Mechanism (10)
And a fine adjustment mechanism (20) capable of finely adjusting the tilt angle of the seat back. The coarse adjustment mechanism (10) includes a base member (16) fixed to a seat cushion, and a seat back of the seat back. An arm member (12) fixed to a base end portion and pivotally supported by the base member (16) so as to be tiltable; and a center at which the arm member (12) tilts to the base member (16). Relay plate (1)
4), an upper tooth (13) fixed to the arm member (12), and having an arc-shaped tooth portion concentric with the tilting center, and provided on the relay plate (14); A lower tooth (17) that meshes with the relay plate (14) to restrain the arm member (12) from tilting with respect to the relay plate (14); ), A slide member (22) that is fitted to the guide member (14a) so as to be relatively movable, and is rotatably supported by the base member (16). When the cam portion (25) is fitted to the slide member (22) and rotates, the cam portion (25) moves on the slide member (22) to move the guide member (14a) and the relay plate (14). Before) Consists in reclining apparatus characterized by having an eccentric cam member for tilting the arm member (12) (24).

[0008]

In order to roughly adjust the tilt angle of the seat back, the coarse adjustment mechanism (10) may be operated. That is, the lower tooth (17) is operated and removed from the upper tooth (13). Thereby, the arm member (12) can be tilted, and the seat back can be adjusted to a desired tilt angle.

After the seat back is adjusted to the desired tilt angle, the lower tooth (17) is operated to engage the upper tooth (13). Thereby, the arm member (1)
Through 2), the seat back is restrained from tilting to a desired tilting angle.

[0010] The lower tooth (17) is the upper tooth (1).
The cam portion (25) of the eccentric cam member (24) is fitted to the slide member (22) regardless of whether it is engaged with or disengaged from the slide member (3).
The guide member (14) is immovably restrained.
a), the relay plate (14) is connected to the base member (1).
6) so as not to swing.

Further, to finely adjust the tilt angle of the seat back, a fine adjustment mechanism (20) may be operated. That is, when the eccentric cam member (24) is rotated, the cam portion (25) pushes the slide member (22), and the slide member (22) is guided by the guide member (1) of the relay plate (14).
Move along 4a). As a result, the relay plate (14) swings concentrically with the tilt center of the arm member (12), and the lower tooth (17) meshes with the upper tooth (13). By tilting integrally with (14), the seat back tilts to a desired tilt angle.

When the seat back tilts to a desired tilt angle, the rotation of the eccentric cam member (24) may be stopped. When the eccentric cam member (24) stops rotating, the relay plate (14) is restrained from swinging with respect to the base member (16), and the relay plate (14) and the arm member (12) are moved. The seat back is restrained from being tilted to a desired tilt angle via this.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show one embodiment of the present invention. As shown in FIG. 1, the present invention provides a reclining device 1 for supporting a seat back (not shown) so as to be tiltable.
0a, a coarse adjustment mechanism 10 capable of coarsely adjusting the tilt angle of the seat back and a fine adjustment mechanism 20 capable of finely adjusting the tilt angle of the seat back are provided. The coarse adjustment mechanism 10
An arm member 12 is fixed to a base end of a seat back (not shown). The arm member 12 is pivotally supported by a base member 16 via a pivot 15 so as to be tiltable. The base member 16 is fixed to a seat cushion not shown. The relay plate 14 is swingably supported by the pivot 15.

An upper tooth portion 13 is formed at a lower end edge of the arm member 12, and the tooth portion of the upper tooth portion 13 is
5 are arranged continuously in an arc shape. The lower tooth 17 is swingably supported on the relay plate 14 between a meshing position meshed with the upper tooth portion 13 and a detached position separated from the upper tooth portion 13. The lower tooth 17 is urged by a tension spring 18 in a direction swinging to the meshing position. A tooth member 19 is formed on the lower edge of the relay plate 14 so that the lower tooth 17 is simultaneously engaged and disengaged when the lower tooth 17 is engaged with and disengaged from the upper tooth portion 13. They are connected in an arc around the pivot 15.

The lower tooth 17 engages with and disengages from the upper tooth portion 13 to restrain the arm member 12 from being tilted at a desired tilt angle. A groove 12a for restricting the tilt angle is formed in the arm member 12, and a pin member 14b planted on the relay plate 14 is movably fitted in the groove 12a for restricting the tilt angle. The fine adjustment mechanism 20 includes the relay plate 1
4 is a horizontally long guide groove which is a guide member formed in
have. A slide member 22 of a rectangular plate is fitted in the guide groove 14a so as to be movable in the longitudinal direction. A through hole 23 having a circular cross section is formed in the center of the slide member 22.

An eccentric cam member 24 is rotatably supported on the base member 16, and the eccentric cam member 24 is integrally formed with a cam portion 25 having a circular cross section eccentric to the center of rotation. When the cam portion 25 rotates the eccentric cam member 24, the cam portion 25 moves the slide member 22, and the arm member 12 moves through the guide groove 14a and the relay plate 14.
Is fitted into the through hole 23 so that the can is tilted. A gear portion 26 is formed integrally with the eccentric cam member 24, and a small steel ball 27 that can be fitted in the tooth groove of the gear portion 26 is provided, and is attached by a spring member 28 in a direction in which the small steel ball 27 fits. It is being rushed.

Next, the operation will be described. To roughly adjust the tilt angle of the seat back (not shown), the coarse adjustment mechanism 10 may be operated. That is, the lower tooth 17 is operated against the urging force of the tension spring 18 to swing the lower tooth 17 to the disengaged position, and detached from the upper tooth portion 13. Thereby, the arm member 12 can swing with respect to the relay plate 14, and the seat back can be adjusted to a desired tilt angle. At this time, the lower tooth 17 also comes off the tooth member 19.

After the seat back is adjusted to the desired tilt angle, the lower tooth 17 is operated to swing the lower tooth 17 to the meshing position and mesh with the upper tooth portion 13. As a result, the seat back is restrained by the arm member 12 from being tilted at a desired tilt angle. At this time,
The lower tooth 17 also meshes with the tooth member 19. Regardless of whether the lower tooth 17 is engaged with or disengaged from the upper tooth 13, the cam portion 25 of the eccentric cam member 24 is fitted in the through hole 23 of the slide member 22, and as a result, Since the member 22 is immovably restrained, the relay plate 14 is
Does not swing with respect to the base member 16.

With the above operation, the tilting angle of the seat back can be roughly adjusted. Further, to finely adjust the tilt angle of the seat back, the fine adjustment mechanism 20 may be operated. That is, the eccentric cam member 24 is connected to the spring member 2.
8, the cam member 25 is pushed into and pulled out from the slide member 22 because the cam portion 25 is fitted in the through hole 23 of the slide member 22, and the slide member 22 The guide member 14a moves along the guide groove 14a while pushing the side edge thereof. (The slide member 22 and the guide groove 14a are set to the state shown by the imaginary line.) Thereby, the slide member 22 is moved to the guide groove 14a.
In order to push the side edge of the arm member 12, the relay plate 14 swings concentrically with the tilt center of the arm member 12. (The arm member 12 is brought into a state shown by an imaginary line.) Since the lower tooth 17 is meshed with the upper tooth 13, the arm member 12 is tilted integrally with the relay plate 14, and the seat back is tilted at a desired tilt angle. To tilt. At this time, since the lower tooth 17 is meshed with the tooth member 19, the arm member 12 is securely tilted integrally with the relay plate 14. When the seat back tilts to a desired tilt angle, the rotation of the eccentric cam member 24 may be stopped. When the eccentric cam member 24 stops rotating, the relay plate 14 is restrained from swinging relative to the base member 16 via the slide member 22 and the guide groove 14a. , The seat back is restrained from tilting at a desired tilt angle.

[0020]

According to the reclining device of the present invention, in order to adjust the tilt angle of the seat back, it is only necessary to operate the coarse adjustment mechanism to coarsely and quickly tilt the seat back. Activate the fine adjustment mechanism, rotate the eccentric cam member, move the slide member along the guide member, swing the relay plate and the arm member together, and continuously tilt the seat back The seat back can be quickly adjusted to the tilt angle most suitable for the occupant, and the usability can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a reclining device showing one embodiment of the present invention.

FIG. 2 is a front view of a reclining device showing one embodiment of the present invention.

FIG. 3 is a front view of a reclining device showing a conventional example.

FIG. 4 is a front view of a reclining device showing another conventional example.

[Explanation of symbols]

 10a: Reclining device 10: Coarse adjustment mechanism 12: Arm member 13: Upper tooth portion (upper tooth) 14: Relay plate 14a: Guide groove (guide member) 16: Base member 17: Lower tooth 20: Fine adjustment mechanism 22: Slide member 24: Eccentric cam member 25: Cam part

Continuation of the front page (56) References JP-A 1-177936 (JP, U) JP-A 63-133138 (JP, U) JP-A 49-46913 (JP, U)

Claims (1)

(57) [Claims] 1. A reclining device for supporting a seat back in a tilt-adjustable manner, comprising: a coarse adjustment mechanism capable of roughly adjusting a tilt angle of a seat back;
A fine adjustment mechanism capable of finely adjusting the tilt angle of the seat back, wherein the coarse adjustment mechanism is fixed to a base member fixed to a seat cushion, and the base member is fixed to a base end of the seat back. An arm member pivotally supported so as to be tiltable, a relay plate pivotally supported on the base member with the center of the arm member tilting concentrically, and fixed to the arm member,
An upper tooth having teeth connected to each other in an arc with the center of the tilt being concentric with the upper plate, provided on the relay plate, meshing with the upper tooth to restrain the arm member from tilting with respect to the relay plate. The fine adjustment mechanism includes a guide member provided on the relay plate, a slide member fitted to the guide member so as to be relatively movable, and the slide member rotatably supported by the base member. The cam portion is fitted to the member, and the cam portion has an eccentric cam member that, when rotated, moves the slide member and tilts the arm member via the guide member and the relay plate. A unique reclining device.