JPS5929579Y2 - Seat liner - Google Patents

Description

[Detailed description of the invention] The present invention relates to a seat recliner for automobiles, etc., and its purpose is to adjust the inclination angle of the backrest arm steplessly by a mechanism of an external gear meshed eccentrically with an internal gear. This allows for easy and light adjustment operations.

Conventionally, an internal gear is provided on a backrest arm that can freely pivot relative to a base arm, and an external gear is eccentrically engaged with the internal gear, and the external gear is eccentrically rotated via an eccentric camshaft provided on a pivot. Seat recliners are known that move and provide a tilt angle to a backrest arm depending on the difference in the number of teeth between an internal gear and an external gear.

However, in this case, the inclination angle of the backrest is adjusted by rotating a grip fixed to the end of the pivot in forward and reverse directions.

This grip is located to the side of the pivot point between the seat and backrest of the seat, and in order to grasp the grip, you must insert your hand into a narrow gap inside the door and then reach backwards. .

Therefore, if you hold the grip in such an unnatural posture,
Performing forward and reverse rotation is extremely difficult to operate and requires rotational operating force.

The present invention provides an improved seat recliner to eliminate the above-mentioned conventional problems.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a base arm and 2 is a backrest arm.

An internal gear 3 is integrally fixed to the backrest arm 2.

Reference numeral 4 designates a pivot for supporting the base arm 1 and the backrest arm 2, and on the pivot 4 there are two eccentric cam shafts 5a.
, 5b are formed with positional differences in opposite directions, and two externally toothed gears 6a are applied to this eccentric force A5a, 5b.
, 6b are fitted and supported.

The external gears 6a and 6b have a difference in the number of teeth from the internal gear 3, and are engaged with the internal gear 3 at opposite positions of, for example, 180 degrees by changing the phases based on the eccentric cam shafts 5a and 5b. There is.

7a. Reference numeral 7b denotes a swing pin fixed to the side surface of the external gear 63.6b, which loosely fits into a small hole formed on the circumference of the base arm 1 and the auxiliary arm 1a around the pivot 4. There is.

In the case of the example shown above, two externally toothed gears 68.6b are provided with different phases, but it is also possible to use only one externally toothed gear 68.6b. When adjusting the angle, the backrest arm 2 is tilted by swinging an external tooth gear, but there is also a structure in which the angle is adjusted by swinging the backrest arm 2 without using a swing pin. The main structure of the invention described below is applied.

Therefore, in the seat recliner with the internal gear and external gear configuration as described above, the present invention has a conventional grip with an operating lay structure as shown in FIG.

To explain its specific structure, reference numeral 8 denotes an operating lever, which is rotatably supported at the end of the pivot shaft 4, and the tip of the operating lever 8 is located forward on the side of the seat.

A feeding gear 14 is fixedly mounted on the pivot shaft 4 of the pivot portion of the operating lever 8.

Further, a feed pawl member 11 is pivotably attached to the operating lever 8 corresponding to the feed gear 14 by a pin 12.

The feed pawl plate 11 is formed with bifurcated feed pawls 11 a and 11 b that engage with the feed gear 14 .

A turning force is applied to the feed claw member 11 by the spring 13 in a direction in which the feed claw 11a (or 11b) always engages with the feed gear 14.

On the other hand, a knob 9 is provided at the tip of the operating lever 8 so as to be freely retractable, and the knob 9 and the feed claw member 11 are connected by a connecting rod 10.

Further, in the present invention, in the connection structure between the knob 9 and the connecting rod 10, a locking device is provided to lock the knob 9 at the direction switching position of the feed claw member 11.

An example of the locking device is as shown in FIG.
A lock button 15 always urged in the projecting direction by a spring 16 is provided on the knob 9 so as to be retractable.
A lock hole 17 is provided to engage with this lock button 15.

In order to restrict rotation of the knob 9 and allow movement only in the axial direction, a long groove 18 is provided in the knob 9, and a knock pin 19 fixed to the lever 8 is engaged with the long groove 18.

Furthermore, the connection structure between the knob 9 and the connecting rod 10 is such that an elongated hole 20 is provided at the inner end axis of the knob 9, a guide 21 is integrally attached to the opening of this elongated hole 20, and the connecting rod 10 is connected to the guide 21. It is slidably inserted into the elongated hole 20.

A screw 22 is provided at the end of the connecting rod 10 inserted into the elongated hole 20, and a spring receiver member 23 is screwed onto the screw 22 so as to be able to adjust its position.

In this spring receiver, a coil spring 24 is interposed between the member 23 and the abutting wall surface in the hole 20, and the spring set load of the spring receiver can be adjusted as desired by adjusting the position of the member 23. be.

Further, as shown in FIG. 3, another embodiment of the locking device includes a knob 9a having a pivoting claw 25, and a locking claw member 27 that is pushed and pivoted by the pivoting claw 25.
are installed inside the cylinder 28 with a spring 26 interposed therebetween, and the knob 9a is always projected from the end of the cylinder 28,
The bushing rod 29 extending from the lock claw member 27 is fitted into a hole at one end of the slide piece 31 via a conical coil spring 30, and the slide piece 31
A guide 2 is inserted into the hole at the other end as in the embodiment shown in FIG.
1, the connecting rod 10 is slidably passed through the guide 21 and inserted into the hole, and the spring receiver is inserted into the member 23.
A spring 24 is interposed between the hole and the end wall of the hole.

Although the present invention has the above-mentioned structure, when adjusting the forward tilt of the backrest, if the operating lever 8 is turned upward without pressing the knob 9.9a, the feed pawl 11a will slide on the feed gear 14. When the lever 8 is rotated upward and the operation of the operating lever 8 is stopped, it engages with the feed gear 14.

In this state, when the operating lever 8 is turned downward to its original position, the feed gear 14 rotates in the direction of arrow a in accordance with the stroke of lifting the operating lever 8 upward, and rotates the external gears 6a and 6b via the pivot shaft 4. By swinging and rotating, the backrest arm 2 is tilted forward by fine feeding due to the difference in the number of teeth between the internal gear 3 and the internal gear 3.

Therefore, large angle adjustments can be made by moving the operating lever 8 back and forth in a scattered manner.

Moreover, when tilting the backrest backward, the knobs 9, 9a are pressed.

As a result, the feed pawl member 11 rotates through the connecting rod 10 against the tensile force of the spring 13, and the feed pawl 11b engages with the feed gear 14.

Therefore, by turning the operating lever 8 upward, the feeding gear 14 is rotated in the direction of the arrow, and the backrest arm 2 is fed backward.

When pivoting downward from the ascending end to the original position, the feed claw 11
b slides on the feed gear 14 as described above.

The present invention automatically locks the pressed state of the knobs 9, 9a when the knobs 9, 9a are pressed.
The feed pawl 11b is secured to the feed gear 14 without continuing the pressing operation.

That is, in the lock device of the embodiment shown in FIG. 2, when the knob 9 is pressed, the lock button 15 is moved into the lock hole 1.
7, it is engaged and locks the movement of the knob 9 in the axial direction.

Then, by the pressing stroke of the knob 9, the spring 2
4, move the connecting rods 10 in the same direction, and move the feed claws 11
b engages with the feed gear 14.

Therefore, even when the pressing operation on the knob 9 is released, the knob 9 remains locked by the lock button 15, so the feed pawl 11b maintains the switching state in which it engages with the feed gear 14.

Also, the feed claw 11b when rotating the operating lever 8 downward
When sliding on the feed gear 14 of
0's movement in the opposite direction is absorbed by relatively sliding the guide 21 and compressing the spring 24.

To unlock the pressed state of the knob 9, press the lock button 15 to release the engagement with the lock hole 17, and the elastic force of the spring 13.24 pushes the knob 9 out from the end of the operating lever 8. Then, the end of the long groove 18 comes into contact with the knock pin 19, thereby regulating the position of the protruding end of the knob 9, and at the same time, the feed pawl 11a is brought into contact with the feed gear 14.
It is switched and engaged.

The locking device of the embodiment shown in FIG. 3 is locked by switching the feed pawl 11b to engage the feed gear 14 when the knob 9a is pressed once, just like the knock operation of a knock-type ballpoint pen. Further, when the knob 9a is pressed again, the lock is released and the feed pawl 11a is transferred to the feed gear 14.
The switch engages with the switch.

That is, once the knob 9a is pressed, the rotation actuating pawl 25
swings in the cylinder 28 to compress the spring 26,
At the same time as the lock pawl member 27 is pressed, it pivots to engage and lock with a protruding pawl formed within the cylinder 28.

The bushing rod 29 then pushes the slide piece 31.

The operation of the connecting rod 10 after this pushing of the slide piece 31 is exactly the same as the operation of the locking device shown in FIG. 2 above.

When the knob 9a is pressed again, the turning operation pawl 25 pushes the locking pawl member 27 again and gives a turning movement to an angle at which it disengages from the protruding pawl formed on the cylinder 28, and the knob 9
When the pressure of the spring 13.a is released, the lock pawl 27 becomes able to slide inside the cylinder 28 toward its original position.
24 of the slide piece 31 and the spring 3
It is pushed back to the original position via the bushing rod 29 by the sum of the elastic force of 0.

As described above, according to the present invention, the angle adjustment operation of the backrest in the Citric Liner with the internal gear and external gear configuration is performed by the vertical rotation of the operating lever extending laterally and in front of the seat. Compared to the conventional grip system, it is much easier to operate and can be achieved in a natural posture, and the lever ratio of the operating lever significantly reduces the operating effort, providing smooth, light, and reliable operation.

In addition, the knob that switches the bifurcated feed claw that engages with the feed gear is equipped with a locking device that dynamically locks the state by pressing the knob when switching either one. Therefore, it is possible to omit the operation of continuing to press the knob with the thumb when rotating the operating lever up and down, and this has the advantage of preventing erroneous operation in the direction of tilting the backrest.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main parts of a seat recliner using an internal gear and external gear mechanism, and FIG. 2 is a side view of the seat recliner equipped with the present invention. FIG. 3 is a perspective view of the main parts of another embodiment. 1...Base arm, 2...Backrest arm, 3...Internal gear, 4...Pivot, 5a, 5b...Eccentricity Camshaft, 6 a, 6
b... External gear, 8... Operation lever, 9.9a... Knob, 11... Feed claw member, 11 a, 11 d... ...Feeding claw, 12
...Pin, 13 ...Spring, 14
...Feed gear, 15...Lock button, 17...Lock hole, 20...Hole, 21...Guide, 23. ... Spring holder is a member, 24 ... Spring, 25 ...
...Swivel operation claw, 26...Spring, 27
...Lock claw member, 28...Cylinder, 29...Button rod, 30...
Spring, 31... Slide piece.

Claims (1)

[Scope of utility model registration request] It has an internal gear provided on either the base arm or the back arm, an external gear that meshes with the internal gear with a difference in the number of teeth, and an eccentric cam that eccentrically supports the external gear. , in a seat recliner comprising the internal gear and a pivot shaft having the same central axis, an operating lever is rotatably provided at the end of the pivot shaft, and a feeding gear is fixed to the end of the pivot shaft;
A bifurcated feed pawl member that engages with the feed gear and provides forward and reverse rotation is pivotally connected to the operation lever, and the operation lever includes a knob that switches the direction of the feed pawl member, and the knob is connected to the feed pawl. A seat recliner characterized by being provided with a locking device that locks the member at either direction switching position.