JPH0975162A - Reclining adjuster device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To eliminate rattling due to a gap between a guide plate for slidingly guiding a lock plate and the lock plate. A sector gear (9) is mounted on a second bracket (3) pivotally attached to a shaft (2) from a first bracket (1), and a sector gear (9) is attached on a radius centered on the shaft (2), and a lock gear that faces the gear and is disengaged from the gear. 11 is movable toward the sector gear 9 along the fixed guide plate 12a and the movable guide plate 12b on the side of the first bracket 1, and the push-up cam portion 13b of the cam body 13 that cooperates with the operation plate 5 locks the lock gear. When pushing up 11, the overhanging pressing portion 13a of the cam body 13 moves the movable guide plate 1
A configuration in which the actuating portion b of 2b is actuated so that the movable guide plate 12b sandwiches the lock gear 11 between the movable guide plate 12b and the fixed guide plate 12a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a reclining adjuster device for a vehicle seat.

[0002]

BACKGROUND ART Reclining devices for automobile seats are widely used, and one end is pivotally supported with respect to an internal tooth type in which a lock gear is disengaged from a sector gear having internal teeth or an external tooth sector gear is pivoted. There is an external tooth type that can be engaged and disengaged with the lock gear made possible.

For example, a movable second mounted on the backrest.
The bracket is rotatably pivoted on a shaft from a fixed first bracket which is fixed to the seat, and a sector gear having locking teeth inside is fixed to the movable second bracket. A lock plate facing the locking teeth, provided with engaging teeth that mesh with the locking teeth, and having pins implanted,
The guide plate fixed to the first bracket side to be fixed is slidably fitted into the guide plate, and further, the pin from the lock plate is fitted into a cam hole provided in the operation plate fitted to the shaft, and the lock plate is operated by the operation of the operation plate. Is moved along the guide plate in the direction of the engaging teeth to engage or move in the releasing direction to engage and disengage the engaging teeth with the engaging teeth, and at the same time with the cam body provided on the operation plate side. There is an internal tooth type reclining device that pushes up the lock plate from the lower part and prevents the mesh from being disengaged.

[0004]

In the internal tooth type reclining device, a lock plate provided with engaging teeth is provided between a pair of guide plates mounted and fixed to the fixed first bracket side, and the internal teeth facing each other are provided. It is structured so that it can slide forward and backward toward the provided sector. Therefore,
Due to the construction, a slight gap is required between the lock plate and the guide plate, and this gap has a disadvantage of causing backlash of the backrest.

[0005]

SUMMARY OF THE INVENTION In order to solve this problem, the present invention has been made in view of such a situation, and in the reclining in which the second bracket is adjusted by the lock plate,
The guide plate provided on the first bracket side is provided with a fixed guide plate and a guide portion corresponding to the fixed guide plate, and an actuating portion is provided on the other side to provide a movable guide plate having an intermediate portion pivotally supported. When the lock plate is pushed up by the push-up portion of the cam body that cooperates with the actuation plate, the actuating portion of the movable guide plate is operated by the pushing portion of the cam body, and the guide portion of the movable guide plate acts as a fixed guide plate. It provides an internal tooth type reclining adjuster device in which the gap between the lock plate and the guide plate (the play of the lock plate) is eliminated by pushing the lock plate between them and the "backlash" of the backrest is eliminated. is there.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a reclining adjuster device according to the present invention, which will be specifically described below with reference to the drawings.

Reference numeral 1 denotes a first bracket fixed to a side portion of a seat. The first bracket 1 has a rising portion 1a at one end on the back side, and a shaft 2 having one end fixed to the rising portion 1a is laterally extended. , The second with the backrest attached to this shaft 2
The lower end side of the bracket 3 is pivotally attached via a flanged bush 2a so that the second bracket 3 can rotate about the shaft 2.

The shaft 2 is fitted with an intermediate portion of an operating lever 4 having a knob 4a, and the tip of the operating lever 4 has one end of a pin 6 extending from an operating plate 5 extending from an extending piece 5a. A long hole 4b to be fitted is provided to communicate with each other, and the other end of the pin 6 is fitted into a hole 7a formed at the tip of a lever 7 which pivotally supports a bending portion of the first bracket 1, and the other end of the lever 7 is also inserted. Is
Return spring 8 with one end attached to the first bracket 1
The other end of the control lever 4 is connected to the other end so that the operation of the operating lever 4 and the operating plate 5 is returned by the spring 8.

A sector 9 provided with locking teeth 9a inside is attached to the second bracket 3 with the shaft 2 as the center, and the locking teeth 9a of the sector 9 have a substantially triangular shape provided on the operation plate 5. The engagement teeth 11b on the tip side of the lock plate 11 having the pin 11a loosely fitted in the shaped cam hole 10 are opposed to each other so that the lock plate 11 can move between the guide members A arranged on the first bracket 1. Cam hole 1 of operation plate 5
The engaging tooth 11b can be engaged with and disengaged from the engaging tooth 9a by the rotation of the operation plate 5 via the pin 11a loosely fitted in the pin.

That is, the engaging teeth 11b of the lock plate 11
When is disengaged from the locking teeth 9a, the second bracket 3 becomes free around the shaft 2, and when engaged, the position is set.

The guide member A for guiding the lock plate 11 is a fixed guide plate 12a fixed to the first bracket 1 side and a movable guide plate 12b arranged facing the fixed guide plate 12a with a gap. Composed and movable guide plate 1
Reference numeral 2b denotes a guide portion a which guides the lock plate 11 in correspondence with the fixed guide plate 12a, and an overhanging pressing portion 13a from a cam body 13 which will be described later, and is pushed and swung while the cam body 13 is rotating. Is formed by providing an operating portion b to which
An intermediate portion of the movable guide plate 12b is pivotally supported on the first bracket 1 so as to be swingable by a shaft 14.

Further, the cam body 13 is the movable guide plate 1
2b comprises an overhanging pressing part 13a for operating the operating part b, and a pushing up cam part 13b for moving and pushing up the lock plate 11 in the locking direction when the overhanging pressing part 13a presses the movable guide plate 12b. Then, when the operating portion b of the movable guide plate 12b is pressed, the guide portion a sandwiches the lock plate 11 between itself and the fixed guide plate 12a so that the locking teeth 9a and the engaging teeth 11b are securely meshed. It is made to lock by doing. Further, the cam body 13 is axially supported together with the operation plate 5 on the shaft 2 so as to be movable integrally with the operation plate 5.

That is, when adjusting the backrest, when the operating lever 4 is actuated against the spring 8 and the operating plate 5 is rotated around the shaft 2, the cam body 13 which cooperates with the operating plate 5 integrally.
1 rotates together with the operation plate 5 in the direction opposite to the time of FIG.
The lock plate 11 and the movable guide plate 12b are released from pressing, and the operation plate 5 is simultaneously rotated to loosely fit the pin 11a into the cam hole 10 provided in the operation plate 5.
By moving the lock plate 11 along the guide member A to unlock the locking teeth 9a and the engaging teeth 11b, the movable second bracket 3 becomes free about the shaft 2 and the backrest. The position can be freely selected.

When the second bracket 3 of the backrest is set as described above, when the operating lever 4 and the operating plate 5 are returned to the previous positions by the spring 8, the lock plate 11 is guided by the guide member A, and the cam hole 10 and the cam hole 10 are formed. Pin 11a
The lock plate 11 is pushed up by the push-up cam portion 13b of the cam body 13 and the actuating portion b of the movable guide plate 12b is moved by the push-up cam portion 13b of the cam body 1.
The protruding pressing portion 13a of 3 operates to swing around the shaft 14, and the lock plate 11 between the fixed guide plate 12a and the guide portion a is pinched by the guide portion a to ensure the lock. is there.

[0015]

As described above, the present invention requires a small gap between the lock plate and the guide plate, and this gap causes "backlash" of the backrest. However, the present invention cooperates with the operation plate. By the push-up cam part of the cam body and the overhanging press part,
It guides the lock plate between the fixed guide plate and the movable guide plate, and at the lock plate push-up position, the guide plate of the movable guide plate and the fixed guide plate sandwich the lock plate between the guide plates, It has the effect of eliminating the gap between the lock plates and eliminating "backlash" in the backrest.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a reclining adjuster device according to the present invention.

FIG. 2 is a vertical sectional front view.

FIG. 3 is a partially enlarged view of FIG. 1;

[Explanation of symbols]

 1 1st bracket 1a Rise part 2 Shaft 2a Bush with a collar 3 2nd bracket 4 Control lever 4a Knob 4b Long hole 5 Control plate 5a Overhanging piece 6 Pin 7 Lever 8 Spring 9 Sector 9a Locking tooth 10 Cam hole 11 Lock plate 11a Pin 11b Engaging tooth 12a Fixed guide plate 12b Movable guide plate 13 Cam body 13a Overhanging pressing part 13b Pushing up cam part 14 Shaft

Claims (1)

[Claims] 1. A second bracket is rotatably pivotally attached to a shaft from a first bracket fixed to the seat side, and the second bracket is provided with locking teeth on a radius centered on the shaft. Attaching the sector gear that has, further provided with engagement teeth facing the locking teeth of this sector gear, for engaging and disengaging from the locking teeth,
Also, in the reclining in which the lower portion of the lock plate guided along the guide plate provided on the first bracket side is pushed up and released by the cam body that cooperates with the operation plate, the first bracket side is provided. The guide plate provided on the fixed guide plate, a guide portion corresponding to the fixed guide plate,
The movable guide plate is provided with an actuating portion that is actuated by an overhanging pressing portion from the cam body, and an intermediate portion is swingably supported.
When the lock plate is pushed up by the push-up portion of the cam body, the projecting push portion operates the operating portion so that the guide portion of the movable guide plate slides in the lock plate between the fixed guide plate and the reclining plate. Adjuster device.