JP2000197535A - Reclining apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing means of a retaining plate on which an inner end of a spiral spring is retained to energize a seat back bracket in the direction of tilted forward in a reclining apparatus in which an angle adjusting mechanism unified in a disc is interposed between a seat back bracket and a seat cushion bracket. SOLUTION: This reclining apparatus A has an engaging recessed part at a retaining plate 1a on which is retained an inner end of a spiral spring 13 and is provided with a round hole through which is inserted an operating shaft 3 concurrently acting as shaft of the reclining apparatus and a circular arc- shaped protrusion 12c along which is arranged a circular arc wood part at the inner end of the spiral spring 13 is provided on the round hole and a roughly concentric circle. A protruding piece 26 is integrally formed on a surrounding part of a shaft hole pierced by the operating shaft 3 at a bracket 1 with the retaining part 1a fixed and the protruding piece 2b is fitted into the engaging recessed part of the retaining part 1a while the protruding piece 2b is bent outside the round hole and caulked to fix the retaining plate 1a on the bracket 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reclining device used for automobile seats and the like, and more particularly, to a locking plate for locking an end of a spiral spring for constantly urging a seat back forward. The present invention relates to a reclining device having a partial configuration.

[0002]

2. Description of the Related Art Conventionally, various reclining devices have been proposed and put into practical use. However, an angle adjusting mechanism having a substantially disc shape is advantageous in terms of a space for mounting on an automobile seat and a common basic configuration. A reclining device that is shared as a unit and to which a bracket suitable for each seat is attached has been put to practical use.

[0003] A substantially disk-shaped unit in this type of reclining device has a movable disk and a fixed disk mounted so as to be relatively rotatable about an operation shaft also serving as a rotary support shaft, and one of the disks has an internal gear. The other disk is provided with a lock gear engaged with the internal gear. A bracket on the seatback side is fixed to one disk of the unit, and a bracket on the seat cushion side is fixed to the other disk. The outer end of a spiral spring that constantly urges the seatback forward is one side. The inner ends of the spiral springs are respectively locked to the locking pieces provided on the other bracket by the locking pieces provided on the other bracket. The locking pieces whose ends are locked have been fixed to each bracket by caulking or welding using rivets.

[0004]

In the above-mentioned conventional reclining device, the angle adjusting mechanism unitized in a substantially disk shape can be used as a basic component, and although the effect of increasing the productivity of the common use of components is great, the spiraling device is used. It was necessary to fix the locking pieces for locking the outer end and the inner end of the spring to each bracket by caulking or welding. In particular, the locking piece for locking the inner end of the spiral spring needs to be provided in a limited space around the operation shaft, and is welded to a bracket with a limited thickness or caulked using a normal rivet. Fixing is difficult, and there are disadvantages in terms of workability and miniaturization of the device.

An object of the present invention is to provide a reclining device which solves the above-mentioned disadvantages.

[0006]

A reclining device for achieving the above object is an angle adjusting mechanism of a substantially disc-shaped unit in which a movable disc and a fixed disc are rotatably combined around an operation shaft which also serves as a rotary support shaft. And two brackets on the seat cushion side and the seat back side, which are respectively fixed to the outer surfaces of the two discs, and are disposed between the two brackets on the seat cushion side and the seat back side to attach the seat back in the forward direction. A reclining device having a biasing spiral spring, wherein the locking plate on which the inner end of the spiral spring is locked has a circular hole through which an operation shaft having an engaging concave portion is inserted, and a substantially circular hole. An arc-shaped projection at the inner end of the spiral spring is disposed along the concentric circle and locked, and the locking plate is fixed. The bracket on the other side has a protrusion integrally formed around a shaft hole through which an operation shaft passes, and the protrusion is fitted into an engagement recess of the locking plate, and Are bent and caulked outwardly of the circular hole so that the locking plate is fixed to the bracket.

[0007]

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

A is a reclining device. The reclining device A includes a seat back bracket 1 attached to a seat back side of an automobile seat and a seat cushion bracket 2 attached to a seat cushion side.
And an angle adjustment mechanism B of a substantially disk-shaped unit interposed between the two brackets. The angle adjusting mechanism B includes a bottomed fixed disk 4 to which the seat cushion bracket 2 is fixed, and a bottomed movable disk 5 to which the seat back bracket 1 is fixed. The movable disk 5 is a fixed disk 4. The two disks are relatively rotatable about the operation shaft 3 as an axis. The movable disk 5 is provided with a circular concave portion 5a on the side facing the fixed disk 4, and has internal teeth 5b formed on the inner peripheral wall of the concave portion 5a. A pair of guide plates 6 and 6 are integrally formed on the fixed disk 4 on the side facing the movable disk 5, and guide grooves 6 a and 6 a are formed between the respective guide plates 6 and 6. ,
Lock gears 7, 7 that can move forward and backward in the direction of the internal teeth 5b of the movable disk 5 are disposed in the guide grooves 6a, 6a.

Further, in the recess 5a of the movable disk 5, a cam body 8 pivotally supported by the angular shaft portion 3a of the operating shaft 3, an operating plate 9 integrated with the cam body 8, and a cam A spiral spring 10 is disposed on both sides of the body 8. The two lock gears 7, which are disposed opposite to the cam body 8,
Raised portion 8 which comes into contact with each of the members 7 and is pushed in the direction of the internal teeth 5b
a, 8a are provided, and the operating plate 9 is provided with a cam hole 9a through which a pin 7b implanted in each lock gear 7, 7 is inserted. The inner ends of the spiral springs 10, 10 are provided. Is locked by the protruding rod 4b of the fixed disk 4, and the outer end thereof is locked by the cam body 8, and by the action of the spiral springs 10, 10, the respective lock gears 7, 7 are passed through the cam bodies 8, 8. Are urged in such a direction as to always mesh with the internal teeth 5a of the movable disk 5.

The operating shaft 3 penetrates the seat back bracket 1 and the seat cushion bracket 2, and an operating lever 11 is fixed to a tip of the operating shaft 3 protruding toward the seat cushion bracket 2. Yes,
A spiral spring 13 is provided between the seat back bracket 1 and the seat cushion bracket 2. The outer end of the spiral spring 13 is locked by a protruding piece 1b of a locking plate 1a crimped to the seat back bracket 1, and the inner end thereof is fixed to a portion of the seat cushion bracket 2 around the operation shaft 3. The seat back (not shown) attached to the seat back bracket 1 is urged forward by a spiral spring 13.

The locking plate 12 has a substantially disk-shaped main body provided with a circular hole 12b having a plurality of engaging recesses 12a, and an arc-shaped projection 12c substantially concentric with the circular hole 12b. Locking piece 12 integrally extending substantially in the same plane from the main body
d is provided. In the seat cushion bracket 2 to which the locking plate 12 is fixed, a plurality of projections 2b, 2b are formed integrally around a shaft hole through which the operation shaft 3 passes, and the projections 2b, 2b are formed. Is the locking plate 12
Are fitted and engaged with the engaging recesses 12a, 12a of the locking plate 1 in this state.
The locking plate 12 is fixed to the seat cushion bracket 2 by being bent outward and bent by the second circular hole 12b.

The arc-shaped portion at the inner end of the spiral spring 13 is disposed along the arc-shaped upright piece 12c of the locking plate 12, and the bent end thereof is at the arc-shaped upright piece 12c.
Is locked to one end. Further, one end of the coil spring 14 is locked to a locking piece 12 d of the locking plate 12, and the other end is locked to a substantially intermediate portion of the operation lever 11.
Are biased in the non-operation direction.

Therefore, when the operating lever 11 is rotated clockwise (upward in the figure) against the urging force of the coil spring 14 in the inoperative state shown in FIG. 1, the operating shaft 3 rotates. Then, the engagement between the locking teeth 7a provided at the end of the lock gear 7 disposed inside the angle adjusting mechanism B and the internal teeth 5b is released, and the fixed disk 4 and the movable disk 5
Can rotate relative to the operation shaft 3 passing through both disks as a fulcrum, and the reclining position is adjusted. When the operation of the operating lever 11 is released at the desired reclining adjustment position, the locking teeth 7a provided at the tip of the lock gear 7 disposed inside the angle adjusting mechanism B and the internal teeth 5b are engaged again. As a result, the relative rotational position between the fixed disk 4 and the movable disk 5 is fixed, and the reclining position is fixed.

[0014]

According to the reclining device of the present invention, a circular hole having an engaging concave portion in a locking plate for locking the inner end of the spiral spring, and an arc-shaped projection substantially concentric with the circular hole. A projection is formed integrally with the bracket on the seat side to which the locking plate is fixed, around the shaft hole through which the operating shaft passes, and the projection is attached to the locking plate. The engaging plate is fixed to the seat cushion bracket by being fitted into and engaged with the engaging concave portion, and bent and caulked outwardly of the circular hole of the engaging plate. For this reason, the locking plate for locking the inner end of the spiral spring can be rationally fixed to the bracket on the seat side in a limited space around the operation shaft, and the conventional welding or rivet caulking means can be used. Thus, the number of parts can be reduced and the efficiency of the machining operation can be increased as compared with the above-described method.
Further, in the reclining device of the present invention, since the projection provided on the bracket on the seat side is engaged with the engagement recess of the locking plate, the temporary assembling and positioning are performed. Is improved.

[Brief description of the drawings]

FIG. 1 is a front view of a reclining device.

FIG. 2 is a front view partially cut away.

FIG. 3 is a vertical side view.

FIG. 4 is a partial front view of the seat cushion bracket.

FIG. 5 is a front view of a locking plate.

FIG. 6 is a front view of a state in which the locking plate is fixed to the seat cushion bracket.

FIG. 7 is a sectional view taken along line XX ′ of FIG. 6;

[Explanation of symbols]

 Reference Signs List A Reclining device B Angle adjustment mechanism 1 Seat bracket 1a Locking plate 1b Projection piece 2 Seat cushion bracket 2b Projection piece 3 Operating shaft 3a Square shaft 4 Fixed disk 5 Movable disk 5b Internal teeth 6 Guide plate 6a Guide groove 7 Lock gear 7a Locking tooth 7b Pin 8 Cam body 8a Raised portion 9 Operating plate 10 Spiral spring 11 Operating lever 12 Locking plate 12a Engaging recess 12b Circular hole 12c Arc-shaped projection 12d Locking piece 13 Spiral spring 14 Coil spring

Claims (1)

[Claims] An angle adjusting mechanism of a substantially disk-shaped unit in which a movable disk and a fixed disk are rotatably combined around an operation shaft also serving as a rotation support shaft, and are fixed to outer surfaces of both disks, respectively. A reclining device comprising: a bracket on both a seat cushion side and a seat back side; and a spiral spring disposed between the brackets on the seat cushion side and the seat back side to bias the seat back forward. The locking plate on which the inner end of the spring is locked has a circular hole through which an operation shaft having an engagement concave portion is inserted, and an arc-shaped inner end of the spiral spring substantially concentric with the circular hole. Arc-shaped projections are provided along the portion and locked, and the bracket on the side to which the locking plate is fixed has a shaft hole through which the operating shaft passes. The projection is integrally formed at the position, the projection is fitted into the engagement recess of the locking plate, and the projection is bent and caulked in the outward direction of the circular hole, so that the locking is performed. A reclining device, wherein the plate is configured to be fixed to a bracket.