JPH0370482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a reclining device used in a vehicle, etc., and more specifically, an atsupa arm is rotatably attached to a lower arm by a hinge pin, and the atsupa arm is tilted. The regulation and release of the reclining device is performed by moving a locking member using a cam hole.

(Prior Art) As this type of reclining device, the one shown in FIG. 5 is known. This is lower arm 1
The upper arm 2 is rotatably attached to the lower arm 1 with a hinge pin 3, and the release lever 4 is rotatably supported by the hinge pin 3.
A drill pin 5a of a pole (lock member) 5 rotatably attached to the release lever 4 is inserted into a cam hole 4a drilled in the release lever 4, and is stretched between the lower arm 1 and the release lever 4. By pulling up the release lever 4 against the force of the spring 6, the locking portion 5b of the pawl 5 and the engagement groove 2a of the upper arm 2 are disengaged, and the inclination angle of the upper arm 2 can be changed. ing.

(Problems to be Solved by the Invention) In the case of such a configuration, due to restrictions on component arrangement, etc., it is difficult to determine the position of the spring 6 on the release lever 4 and the center of rotation of the release lever 4 (hinge pin 3). As the distance between the two ends increases, the stroke, that is, the amount of expansion and contraction of the spring 6 increases, making it necessary to use a long spring 6. However, if the lower arm 1 is made larger in order to increase the spacing between the springs 6, there is a problem in that the reclining device itself becomes larger.

The present invention has been made in view of the above problems, and an object thereof is to provide a reclining device that can use short springs.

(Means for Solving the Problems) The present invention, which solves the above-mentioned problems, attaches the upper arm to the lower arm rotatably with a hinge pin, and uses a cow hole to restrict and release the tilting of the upper arm. In a reclining device that moves a locking member by
A release arm plate having the cam hole formed therein is rotatably supported by the hinge pin, a release lever is rotatably pivoted to the lower arm,
The rotary end of the release lever is engaged with the release arm plate, and a spring is tensioned between the release lever and the lower arm.

(Example) Hereinafter, an example of the present invention will be described using FIGS. 1 to 4. In Figures 1 to 4, 11
is the lower arm fixed to the seat cushion side,
Reference numeral 12 denotes an upper arm fixed to the seat back side. On the left side surface of the upper arm 12 in FIG. 2, a circular convex portion 12a concentric with the central through hole is embossed by precision press processing or the like.
Furthermore, two engaging grooves 12b are carved on the outer edge. 13 is an eccentric plate, Atsupa arm 1
On the side surface of the second side, a circular concave portion 13a that is concentric with the central through hole and rotatably fits into the convex portion 12a of the upper arm 12, and a circular convex portion 13b that is eccentric to the circular concave portion 13a are precisely formed. Embossed by press processing etc. This convex portion 13b is
It is rotatably inserted into the hole of the lower arm 11. Note that 13a and 13b are stopper portions that work together with a cut-and-raised piece 11c formed on the lower arm 11 to have a function of regulating the range of rotation of the eccentric plate 13. Therefore, the rotation range of the handle 22, which is integrally formed with the eccentric plate 13, is also restricted. Reference numerals 14 and 15 designate pole plates rotatably connected to the lower arm 11 with stepped pins 16, and the rotary ends of both are provided with pole plates that pass through the arcuate hole 11a of the lower arm 11 and engage the upper arm 12. A pole pin 17 (locking member) is attached to the groove 12b and removed from the system. Also, this pole pin 17
is also inserted into a cam hole 18a formed in the release arm plate 18. Reference numeral 19 denotes a release lever rotatably connected to the lower arm 11 by the stepped pin 16, and its rotatable end 19a
is inserted into the bifurcated portion 18b of the release arm plate 18, and its rotation is controlled by the release arm plate 1.
8. This release lever 19 is always operated by a spring 20 stretched between it and the hook portion 11b of the lower arm 11.
It is biased in the counterclockwise direction in FIG. Incidentally, it is also possible to prevent impact noise by interposing a shock absorbing member made of synthetic resin or the like on either or both of the rotating end portion 19a and the bifurcated portion 18b.

Reference numeral 21 denotes a hinge pin that is inserted into a through hole in the center of the eccentric plate 13 and then caulked. The other cylindrical portions of the hinge pin 21 are rotatably inserted into the through holes of the release arm plate 18 and the upper arm 12, respectively. has been done. Further, a handle 22 for rotating the hinge pin 21 is fixed with a screw 23. Note that the operating section 18c of the release arm plate 18 is
The operating portion 19b of the release lever 19 is used by a passenger in the rear seat of a car with a door to fold the seat back forward, and the operating portion 19b of the release lever 19 is used by a passenger in the front seat to adjust the reclining angle. Therefore, in a four-door vehicle or the like, there is no need to provide the operating portion 18c of the release arm plate 18.

Next, the operation of the above embodiment will be explained. In the state shown in FIG. 1, the pole pin 17 is
It is fitted into the engagement groove 12b of No. 2. Adjustment (fine adjustment) in this state is performed by rotating the handle 22. That is, when the handle 22 is rotated,
The hinge pin 21 and the eccentric plate 13 rotate,
The hinge pin 21 is connected to the convex portion 13b of the eccentric plate 13.
revolves around the center of Therefore, the upper part of the upper arm 12 swings back and forth about the pin 17 approximately. Therefore, the reclining angle can be finely adjusted.

When performing rough adjustment (fast forwarding) of the reclining angle, the operating portion 19b of the release lever 19 may be rotated clockwise in FIG. 1 against the force of the spring 20. As a result, the rotating end 19a
moves downward in FIG. 1, and the bifurcated portion 18b of the release arm plate 18 that engages with this moves in the same direction, so the release arm plate 18 rotates counterclockwise in FIG. The pole pin 17 moves away from the hinge pin 21 while being guided by the cam hole 18a. For this reason, pole pin 17
The engagement between the upper arm 12 and the engagement groove 12b is released, and the restriction on the tilting of the upper arm 12 is released. Therefore, the upper arm 12 can be rotated greatly, and the release lever 1 can be moved at the desired position of the engagement groove 12b.
If you release your hand from the operation part 19b of 9, the spring 2
The release lever 19 is rotated counterclockwise by a force of 0, and the pawl pin 17 is fitted into the selected engagement groove 12b. As in the case described above, the reclining angle can be finely adjusted again after this rough adjustment. On the other hand, when the rear seat occupant folds the front seat back forward, the release arm plate 18 is attached to the operating section 18c.
It is sufficient to apply a force that causes the to rotate counterclockwise. Even in this case, the pole latch pin 17 operates in the same manner as when operating the operating portion 19b, so that the seat bag can be folded forward.

If configured as in the above embodiment, the release lever 19 rotates around the stepped pin 16, so the amount of expansion and contraction of the spring 20 becomes much smaller than when the release lever 19 rotates around the hinge pin 21. Therefore, the overall length of the spring 20 can be reduced.

Note that the present invention is not limited to the above embodiments, and various modifications are possible. For example, the engagement between the release arm plate 18 and the release lever 19 may be achieved by pivoting the rotating ends of the two, and the hole for inserting the stepped pin 16 drilled in the release lever 19 may be made into an elongated hole. Good too.

Further, although the above embodiment allows for fine adjustment, it goes without saying that the present invention can also be applied to a reclining device configured as shown in FIG.

(Effects of the Invention) As explained above, in the present invention, the rotation center of the release lever is set at a different position than the hinge pin of the atsupa arm, so the length of the spring that applies the biasing force to the release lever can be shortened. .
Therefore, the size of the reclining device can also be reduced.

[Brief explanation of drawings]

Figure 1 is a front view showing one embodiment of the present invention, Figure 2 is a front view showing one embodiment of the present invention;
The figure is a sectional view of AA in figure 1, and figure 3 is BB of figure 1.
4 is a perspective view showing the main components of the device shown in FIG. 1, and FIG. 5 is a schematic configuration diagram of the conventional device. 11...Lower arm, 12...Atsupa arm,
12a...Protrusion, 13...Eccentric plate, 13a
...Concave portion, 13b...Convex portion, 14, 15...Pole plate, 16...Stepped pin, 17...Pole pin (locking member), 18...Release arm plate, 18a...Cam hole, 18b... 2 crotches,
18c...Operation unit, 19...Release lever, 1
9a...Rotating end portion, 19b...Operation unit, 20...
Spring, 21...hinge pin, 22...handle.

Claims (1)

[Claims] 1. In a reclining device, the upper arm is rotatably attached to the lower arm with a hinge pin, and the tilting of the upper arm is restricted and released by moving a locking member using a cam hole. a release arm plate provided therein is rotatably supported by the hinge pin, a release lever is rotatably pivoted to the lower arm, and a rotary end of the release lever is engaged with the release arm plate; . A reclining device, characterized in that a spring is stretched between the release lever and the lower arm.