KR860001947Y1 - Automobile seat back reclining mechanism - Google Patents

Abstract

No content.

Description

Reclining Devices for Automotive Seats

1 is an external view of an automotive sheet provided with a reclining apparatus according to the present invention.

2 is a front view of the reclining apparatus.

3 is a right side view of FIG.

4 is a front view showing a state in which the sheet backside is inclined backward in the state of FIG. 2;

5 is a schematic view showing the positional relationship between the first lever and the second lever and recesses.

6 is an explanatory diagram of pitches between engagement recesses.

7 degrees is a front view of the engagement piece.

* Explanation of symbols for main parts of the drawings

1: Sheet 2: Sheet Bottom

3: reclining device 4: sheet rear

5: Fixed Bracket 7: Tilt Bracket

10A, 10B: first lever 12A, l2B: second lever

15: fitting main part 17: the first walking dowel pin

21: second hang dowel pin

The present invention relates to a reclining apparatus for an automotive sheet, and in particular, to obtain a small angle of inclination and at the same time reliably maintain the stationary state at each inclination angle.

In general, the simple reclining device is provided with a fitting recess on one side, and the other side is used to adjust the angle of inclination with a pin or the like that is freely installed on the other side. Although the pitch of the fitting recess must be made small, in this case, there is a limit in terms of strength.

As a device that allows the inclination angle to be narrowed without reducing the pitch of the engaging recess due to such a problem, in Japanese Unexamined Patent Application Publication Nos. 44-23071 and 44-27272, the teeth of the back support attachment body It has been provided that two engagement pins are engaged with each other in a valley portion of a shape so that the inclination angle can be adjusted by 2/1 pitch of teeth.

However, in the above device, since the position of the latch of the lever protruding from the engagement pin engaged with the valley portion of the tooth is not on the tangent of the engagement pin engaging the valley portion, If a load is applied, there is a drawback that the engagement pin is easily released from the valley. As such, it is difficult to securely engage the state and is inferior in strength so that there is a problem that is not suitable as an automotive sheet and reclining apparatus.

The present invention is intended to solve the above-mentioned drawbacks, and it is necessary to provide the valley position of the latch position of the lever which has the engagement pins engaged with each other in the valley portion of the engagement recess so as to be tilted slightly at 1/2 pitch of the engagement recess. It is to provide a reclining apparatus for an automotive sheet which is positioned on the tangential line of the engagement pins so that the engagement does not deviate even under a load, so that it is reliably maintained in the stop position.

Next, the present invention will be described in detail by way of examples shown in the drawings.

The vehicle sheet 1 comprises a sheet rear surface 4 freely rotatable via a reclining apparatus 3 to a sheet bottom 2 attached to a vehicle body.

The reclining apparatus 3 pivotally attaches the lower part to the fixing bracket 5 fixed to the sheet bottom 2 and the fixing bracket 5 through the pivot 6, and at the same time, the upper side of the sheet rear surface. A pair of tilting brackets (7) fixed to (4), an engaging piece (8) protruding at the lower end of the tilting bracket (7), and a rotation freely attached to the fixed bracket (5) via a support shaft (9); Similarly to the first levers 10A and 10B, a pair of second levers 12A and 12B which are rotatably attached to the fixed bracket 5 via the support shaft 11 is used as a main component.

The tilting bracket 7 is formed with a concave end 7a circumferentially centered on the spindle 6 at the lower end overlapping with the engagement piece 8 protruding from the side, and the end 7a. The ridge 7b is provided in the vicinity.

In addition, the locking piece 13 is fixed in the vicinity of the shaft 6, and a long slitting groove 6a is provided in the shaft 6, and one end of the vortex spring 14 is closed. (13) matches with the long groove 6a of the other end shaft axis, and has the elastic force in the counterclockwise direction with the tilt bracket 7 as the pivot center. Therefore, the sheet back surface 4 to which the tilting bracket 7 is fixed has an elastic force inclined at all times forward.

At the lower end of the engaging piece 5 protruding from the lower end of the tilting bracket 7, as shown in FIG. 7, a plurality of engaging recesses in a tooth shape are continuously formed on the circumference around the axis 6. 15) (15a ... 15d) and the convex part 16 (16a ... 16e) are formed mutually. In addition, the engagement recessed part 15 and the convex part 16 may be formed in the lower end of a tilting bracket main body.

The first levers 10A and 10B rotatably supported by the shaft 6 on both the left and right sides of the fixing bracket 5 are substantially <-shaped, and the center of the first lever 10 is connected to the axis 6 by the first lever. The first engagement pin 17 is sandwiched between the first ends of the levers 10A and 10B while the 10A and 10B are interlocked.

The first engagement pin 17 is positioned to face the recessed portion 15 and the convex portion 16 of the engagement piece 8. The outer lever 1A is provided with protrusions 18 protruding and protruding at the distal end of the engagement pin attachment side, and the operation knob 19 is attached to the other end side.

In addition, the tension spring 20 is installed between the first lever 10A and the tilting bracket 7 and the first engagement pin 17 is engaged with the engagement recess 15 of the engagement piece 8. The positional relationship is set so that the bearing shaft 9 of the first levers 10A and 10B is tangential to the circular arc of the tooth portion when the engagement force is provided in the alignment direction and the engagement is engaged.

The second levers 12A and 12B are connected to the support shaft 11, and the first end is pivotably rotatably held at the rear side lower portion of the fixing bracket 5 at a position downward from the engagement piece 8. The other end on the free end side of the second levers 12A, 12B is positioned to face the first levers 10A, 10B, and a second engagement pin 21 is sandwiched between the other ends.

The second engagement pin 21 is located opposite the recessed portion 15 and the convex portion 16 of the engagement piece 5. Moreover, the protrusion 22 which protrudes upward is formed in one 2nd lever 12A, and this protrusion 22 is inserted in the edge part 7a of the tilting bracket 7, and it is free to remove.

In addition, the free ends of the second levers 12A and 12B are located below the protrusions 18 of the first lever 10A, and when the protrusions 18 are lowered, they are brought into contact with the second engagement pins 21 to be in contact with each other. The second levers 12A and 12B are pushed down to cooperate with the first levers 10A and 10B. The tension spring 23 is hypothesized between the 2nd lever 12A and the tilting bracket 7, and the 2nd engagement pin 21 engages with the engagement recessed part 15 of the engagement piece 8. Direction, and when positioning, the support shaft 11 of the 2nd lever 12A, 12B is positioned so that it may be located tangentially with respect to the circular arc of a tooth part. In addition, the second engagement pin 21 can be engaged with the engagement recess 15 when the protrusion 22 is inserted into the end portion 7a of the tilt bracket 7, and the engagement recess when the protrusion 22 is not inserted. (15) does not fit.

Next, the operation of the reclining apparatus having the above configuration will be described.

FIG. 2 shows a state in which the seat rear surface 4 is in the foremost position, and the first engagement pin 17 is engaged with the engaging recess 15a of the rotating part of the engagement piece 8. have.

At this time, the protrusion 22 of the second lever 12B is in a position deviating from the front end of the end 7a, and the second engagement pin 21 is not engaged with the engagement recess 15. The first levers 10A and 10B are pulled in the P direction while supporting the elastic force of the tension spring 20 as indicated by the dashed line in FIG. 2 with the operation knob 19 from this foremost position. Rotate clockwise and the first engagement pin 17 is detached from the engagement recess 15a. In this state, the seat back 4 is pushed backward, that is, when the tilting bracket 7 is rotated clockwise with the pivot 6 as the point, the protrusion 22 of the second lever 12B is inserted into the end 7a. Then, the second engagement pin 21 is in a state capable of engaging with the engagement recessed portion 15.

When the second engagement pin 21 releases the pressure of the operation knob 19 at the position corresponding to the engagement recess 15c, the second engagement pin 21 is tension spring as shown in FIG. It is shot by 23, it is engaged with the engagement recess 15c, and the 1st engagement pin 17 is shot by the tension spring 20, and it contacts with the convex part 16b of 1/2 pitch back. .

In this way, the tilting bracket 7 is inclined and stopped at an angle of 1/2 pitch of the engaging recess 15.

Subsequently, when the operation knob 19 is pressed in this state as described above, the protrusion 18 of the first lever 10A is lowered to contact and engage the second engagement pin 21 to engage the second levers 12A and 12B. And the second engagement pin 21 is released from the engagement recessed portion 15c.

In this state, when the tilting bracket 7 is moved backward to release the pressure at the position where the engaging recess 15 and the first engaging pin 17 correspond to each other, the first engaging pin 17 is next to the rotating part. While engaging with the fitting recessed portion 15b, the second engagement pin 21 is in contact with the convex portion 16d.

In this way, the first engagement pin 17 and the second engagement pin 21 are engaged with the engagement recesses 15, and the pitch between the engagement recesses 15 as shown in FIG. It is inclined at 1/2 pitch (bevel angle B) of A).

In addition, when the 1st engagement pin 17 and the 2nd engagement pin 21 are engaged with the engagement recessed part 15, as shown in FIG. 5, 1st lever 10A, 10B, 1st Since the support shafts 9 and 11 of the two levers 12A and l2B are tangential to the circular arc of the teeth, the engaging pin 15 is engaged from the engaging recess 15 even if the tilting bracket 7 is loaded. 17, 21) do not move in the direction of departure of the arrow.

Therefore, the engagement state is surely maintained.

When the tilting bracket 7 is in the rearmost position, the protrusion 22 is detached from the rear side of the end portion 7a, and the second engagement pin 21 is not engaged with the engagement recess 15. Instead, the first engagement pin 17 is engaged with the engagement recess 15c, and the tilt bracket 7 contacts and rests against the paper piece (not shown), thereby restraining any further rear diameter.

In this way, except for the adjustment angle set by the end 7a, the second engagement pin 21 is not engaged with the engagement recess 15, and the adjuster also hangs on the engagement recess 15 last within the range. The first engagement pin 17 is fitted, and the adjustment pitch is constant at 1/2 pitch of the recess 15 within the adjustment angle setting range.

When the tilting bracket 7 is inclined forward, when the first levers 10A and 10B are maneuvered from the foremost position within the adjustment range shown in FIG. 2, the protrusions 22 of the second levers 12A and l2B are operated. Is already removed from the end portion 7a and is engaged with the ridge portion 7b so that the pin 21 is unable to engage the engagement recess 15, and the first engagement pin 17 It is only removed from the engaging portion of the foremost hook (15a), and freely inclined forward.

As apparent from the above description, according to the reclining apparatus according to the present invention, the first engagement pin of the first lever with the operation handle and the tilting bracket of the tilt bracket are added to each other by adding the second lever with the second engagement pin. The angle of inclination pitch can be made small by a half of a conventional pitch (1/2 pitch).

Moreover, since the propulsion points of the first lever and the second lever are located on the tangential line between the engagement pin and the recess, the dowel pin does not detach from the recess even when a load is applied to the tilting bracket from the front or the rear. The strength is improved.

Claims (1)

In a vehicle seat in which a tilting bracket 7 fixed to the sheet bottom 2 is fixed to the seat bottom 2 and the tilting bracket 7 provided on the sheet rear surface 4 is freely rotatable, the tilting bracket 7 has a plurality of fastening recesses ( 15 is disposed on an arc, and the first and second levers 10A, 10B and 12A, 12B are rotatably supported by the fixing bracket 5, respectively, and the first levers 10A, 10B are A first engagement pin 17 is provided on one side of which the operation handle 19 hangs on the engagement recess 15 on the other side and is freely peeled off. The springs 20 and 23 are different from the second levers 12A and l2B. As a result, the first and second engagement pins 17 and 21 have elastic force in the direction in which the first and second engagement pins 17 and 21 engage with the engagement recess 15, and the first lever (10A, 10B) is operated when the first lever (10A, 10B) is operated. The second levers 12A, l2B are interlocked and oscillated by the protrusions 18 formed at 10A, and the first engagement piece 17 and the second engagement pin 21 are engaged with the engagement portion 15. The support shaft 9 of the first levers 10A and 10B and the support shaft 11 of the second levers 12A and l2B with respect to the circular arc surface of the tilting bracket 7 on which the engagement recesses 15 are formed to be hooked and peeled off from each other. The reclining apparatus for an automobile sheet, which is arranged in the tangential direction, respectively.