JPS6297511A - Seat reclining apparatus for car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a seat reclining device for an automobile.

[Prior Art] Conventionally, as a reclining device for setting the seat of an automobile or the like to an optimal driving position, there is one described in Japanese Patent Application Laid-open No. 59-220427, for example.

That is, the reclining device has a fixed plate fixed to the seat cushion side, a movable arm fixed to the seat back side, and the movable arm is in a free restraint release state with respect to the fixed plate and in a predetermined rotation position. a rotation adjustment means for restraining the movable arm; the rotation adjustment means includes a pawl having an engagement latch that removably engages with a latch formed on the movable arm; and an operating lever for actuating the pawl. The pole and operating lever are provided on the fixed plate side.

[Problems to be Solved by the Invention] In a reclining device having such a structure, in order to adjust the rotation of the seat back, the restraint is released by operating the operating lever and releasing the retaining latch of the pole from the latch of the movable arm. After setting the movable arm, the arm is rotated to a desired position, and the engagement latch of the pole is again engaged with the latch of the movable arm to restrain the movable arm, thereby making it possible to adjust the rotation.

The rotary motion in which the movable arm advances one pitch is determined by the pitch from valley to valley of the latch that engages with the engaging latch, so recent reclining devices have been designed to adjust the pitch of the latch so that the driver can obtain the optimal driving position. is set small.

For this reason, if the optimal driving position cannot be obtained after adjusting the recline, the system is first set to a free restraint release state and then rotated one pitch again. In some cases, the driver may move and have trouble finding the correct position, which may result in dissatisfaction with not being able to obtain the optimal driving position.

Therefore, the present invention enables the movable arm to be freely released from restraint and restrained, and furthermore,
It is an object of the present invention to provide a seat reclining device for an automobile in which fine adjustment of a movable arm can be easily obtained.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a fixed plate fixed to the seat cushion side, a rotatable movable arm fixed to the seat back side. , a latch provided on the arm, and a first latch that can engage with the latch.
comprising a pawl, and a first operating lever that engages with the first pawl and rotates the pawl between a restrained state in which the pawl is engaged with the latch and a free restraint release state in which it is disengaged;
The second operation provided on the first operation lever and luck! A second JJ link, which engages with the latch of the movable arm when the first pawl is not engaged, and allows the movable arm to rotate forward or backward by at least one tooth of the latch.
A pole is provided.

[Operation] In order to recline the seat in such an automobile seat reclining device, operate the first operating lever, rotate the seat back to the desired position, then return the operating lever to its original position and release the latch. The first pole is engaged to create a restrained state. This causes the seat back to maintain its position. At this time, if you are dissatisfied with the setting position and want to make a minor correction, press the pressing member, which is the second operating lever provided on the first operating lever, and press the first operating lever.
At the same time as the pawl and the latch are disengaged, the second pawl is brought into engagement with the latch.

From this state, rotate the seat back forward or backward. At this time, movement of at least one tooth of the latch is ensured, and the optimum driving position of the seat back can be obtained.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings of FIGS. 1 to 5.

The seat reclining device includes a fixed plate 1 fixed to the seat cushion side, a movable arm 5 fixed to the seat back side and rotatable around a support shaft 3, and a latch formed on the periphery of the base of the arm 5. The movable arm 5 is always rotated counterclockwise by a spiral spring 13 interposed in the support shaft 3. is energized by Further, the first pawl 9 is rotatably connected to the fixed plate 1 by a shaft 15, and an engagement latch 17 formed at the end thereof engages with the latch 7.

The operation lever 11 is rotatable by a shaft 19 on the fixed plate 1, and the rotation range is between the first and second stopper SI-8.
2, and is urged toward the first stopper S1 by a return spring 21 that is engaged with the lever main body 11a and the fixed plate 1. Further, the engagement pin 23 provided at the lower end of the lever main body 11a faces into the notch groove 25 of the first pawl 9, and the clockwise rotation of the operating lever 11 (
The engagement latch f17 of the first pole 9 is disengaged from the latch 7 of the movable arm 5 at arrow A) in FIG. On the other hand, the handle portion 27 of the operating lever 11 is provided with a push-button type pressing member 29 that is a second operating lever, and the pressing member 29 is connected to the operating rod 31 and the cam plate 33 connected to the rod 31. It is possible to connect with 2 poles 35. The cam plate 33 is the cam shaft 37 displaced to the lever main body 11a.
The actuating rod 31 is rotatably pivoted by the
One end of is connected. Note that the other end of the rod 31 is connected to the pressing member 29. Further, the arm 39 protruding from the outer periphery of the cam plate 33 comes into contact with a stopper 83 provided on the lever main body 11a, and the cam shaft 3
The spring 41 interposed in 7 always rotates the counterclockwise direction.
That is, it is biased in the direction of abutting against the stopper 83. Due to this bias, the pressing member 29 is maintained in a state of protruding from the handle portion 27 of the operating lever 11. A part of the cam plate 33 forms a flat surface 43, and when the operation lever 11 is rotated in the pulling direction, the second pawl 3
It is designed so that it does not come into contact with the tip of 5.

An elongated sliding hole 47 is provided at one end of the pawl main body 45 of the second pawl 35, and the hole 47 is incorporated into the support shaft 3 so as to be active and rotatable, and the other end is attached to the cam plate 33. It is located in close proximity to the area.

A locking plate 49 having an engagement #49a capable of engaging with the latch 7 at the end of the pole main body 45 facing the cam plate side.
are integrally provided by the connecting bin 51, and the connecting bin 51
The tip faces the engagement hole 53 bored in the fixing plate 1. The engagement hole 53 is formed in the shape of the engagement hole 5
When the connecting bin 53 faces the enlarged diameter side of 3, the vertically rotating α
・α is provided. This vertical rotation type α is latch 7
This corresponds to a pitch of one tooth, but a pitch of 2#1 is also possible.

The connecting bottle 51 also has an extension coil spring 5 which is fixed at one end to the second pole 35 and at the other end to the support shaft 3.
5 is always urged in a direction away from the cam plate 33 and is located at the base of the fan-shaped fitting hole 53 to hold the pole body 45.

Note that the tip of the pole body 45 is connected to the aforementioned operating lever 11.
It has an arcuate portion 57 that is the same as the outer circumferential circle of the cam plate 33 provided in the cam plate 33 .

The positioning procedure of the seat reclining device with the above configuration will be explained.

When changing the position of the movable arm 5 from the restrained position shown in FIG. The pole 9 rotates counterclockwise.

At this time, the latch 7 and the engagement latch 17 are disengaged,
The movable arm 5 is in a free, unrestricted state.

In this state, the movable arm 5 is rotated to a desired position.

Next, when the operating lever 11 is released once the position is determined, the operating lever 11 returns to the position shown in FIG. 1 due to the restoring force of the expansion coil spring 21.

At the same time, the engagement latch 17 and the latch 7 engage, and the movable arm 5 becomes in a restrained state.

However, if you are not satisfied with the position of the movable arm 5 and need to make some corrections, move the operating lever 11 in the arrow direction while pressing the suppressing member 29 provided on the operating lever 11 from the state shown in FIG. pull up in the direction. Operation lever 1
As shown in FIG. 5, the cam plate 33 rotates and engages the arcuate portion 57 of the second pawl 35 when the second pawl 35 is pulled up, as shown in FIG. and press.

At this time, the latch 7 and the engagement latch 17 of the first pawl 9 are disengaged, and at the same time, the engagement tooth 49a of the locking plate 49 fixed to the second pawl 35 and the pole body 45 and the latch 7 are disengaged.
The movable arm 5 is temporarily held.

In this state, when the movable arm 5 is rotated forward or backward, a rotation ♀ equal to the rotation angle α can be obtained, and so-called fine adjustment of the movable arm 5 can be achieved. Next, after adjustment, when the operating lever 11 is returned to its original position, the engagement latch 17 of the first pawl 9 and the latch 7 engage with each other, and the movable arm 5 changes from the temporarily held state to the restrained state t'J.

[Effects of the Invention] As described above, according to the present invention, the movable arm can be freely released from restraint and restrained, so that the desired rotation position can be quickly determined. The second pole allows for fine adjustment of the front and back of the movable arm, making it possible to obtain the optimal driving position that suits the driver's height.

[Brief explanation of drawings]

Figure 1 is a side view of the reclining device of the present invention, Figure 2 is a side view of the reclining device of the present invention;
The figure is a sectional view taken along the line ■-■ in Figure 1, and Figure 3 is a cross-sectional view taken along the line ■-■ in Figure 1.
The line sectional views, FIGS. 4 and 5, are operational diagrams. Explanation of main drawing symbols 1... Fixed plate 5... Movable arm 7... Latch 9... First pole 11... Operating lever 29... Suppressing member (second operating lever) 35.・Second
Pole

Claims (1)

[Claims] A fixed plate fixed to the seat cushion side, a rotatable movable arm fixed to the seat back side, a latch provided on the arm, a first pole that can engage with the latch, and a first pole. a first operating lever that engages and rotates the pole between a restrained state in which the pole is engaged with the latch and a free restraint release state in which it is disengaged; and a second operating lever provided on the first operating lever; A second pawl is provided that is interlocked and engages with the latch of the movable arm when the first pawl is not engaged, and allows the movable arm to rotate forward or backward by at least one tooth of the latch. An automobile seat reclining device characterized by: