JP2000270949A - Reclining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reclining device in which the reclining lock release does not occur even in case of the side collision of vehicles. SOLUTION: This device is provided with a lower arm, an upper arm 210, a hinge pin which supports the relative rotation between the lower arm and the upper arm 210, a cylinder part 230 installed on the lower arm side, a disc 240 which is installed in the upper arm 210, and is located in the cylinder part 230, and forms a pair of wedge-like spaces whose directions are opposite between its peripheral surface and the inside circumferential surface of the cylinder part 230, rollers 250 and 251 which are arranged in each wedge-like space and can move in the circumferential direction of the inside surface of the cylinder part 230, a spring 253 which energizes the rollers 250 and 251 in the direction in which they are pushed to the inside surface of the cylinder part 230 and the peripheral surface of the disc 240, and a disc with claws 260 which moves in the axial direction of the hinge pin and moves the rollers 250 and 251 in the direction in which they are separated from the peripheral surface of the disc 240. The disc with claws 260 is made to move in the operation direction of a release lever, when the release lever is operated to the reclining lever lock release direction.

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 a seat of an automobile or the like.

[0002]

2. Description of the Related Art Some seats of automobiles and the like have a reclining device capable of changing the inclination of a seat back.

As an example of this reclining device, there is one having a configuration shown in FIG. In the figure, a hinge pin 3 is attached to a lower arm 1 provided on the floor side.

A substantially triangular rotor 5 attached to the lower arm 1 has a hole 7 into which a hinge pin is loosely fitted. The lower portion of the upper arm 9, which is provided on the seat back side and whose lower portion is laminated with the lower arm 1, surrounds the rotor 5 and is located between the inner peripheral surface of the hole and the side surface of the rotor 5.
A hole 11 is formed in which two crescent-shaped spaces are formed.

As shown in FIG. 6, in each space, a pair of rollers 13, 15, rollers 13 ', 15', 13 ',
15 ", and the rollers 13, 15, the rollers 13 ', 15' and the rollers 13", 15 "are separated from each other by springs 17, 17 ', 17", that is,
It is urged in a direction of pressing against the inner peripheral surface of the hole 11 and the outer peripheral surface of the rotor 5.

A hole 19 into which the hinge pin 3 is loosely fitted is formed at the center, and a pair of rollers 13, 15 and rollers 13 ', 15' are provided on a disk 21 with claws provided near the hole 11 of the upper arm 9. , Rollers 13 ", 15", and rollers 13, 15; rollers 13 ', 15';
A claw 23 having a hypotenuse facing 5 ″ is formed.

FIG. 7 shows a cross section taken along a cutting line AA in FIG.
As shown in FIG. 7, triangular pieces 25 and 27 are arranged between the pawl 23 and the rollers 13 and 15 ", the rollers 13 'and 15', and the rollers 13" and 15 ".

The disk 21 with claws is provided with a guide bar 33 that fits into a guide hole 31 formed in the rotor 5, and the disk 21 with claws is movable only in the axial direction of the hinge pin 3. .

A pressure plate 37 is provided adjacent to the claw disk 21 and has a hole 35 into which the hinge pin 3 is loosely fitted. Has a projection 39 having a slope.

A cover 43 having a hole 41 into which the hinge pin 3 is loosely fitted is provided adjacent to the pressure plate 37. As shown in FIG. 8, on the surface of the cover 43 facing the pressure plate 37, a projection 45 is formed which faces the projection 39 formed on the pressure plate 37 and has an inclination opposite to that of the projection 39. ing.

Accordingly, the rotation of the pressure plate 37 causes the disk 21 with the claw to advance and retreat along the hinge pin 3. Pressure plate 37 cover 4
The pin 47 is provided upright on the surface facing the pin 3.

The pin 47 is inserted through an arc-shaped groove 49 centered on the hinge pin 3 provided on the cover 43. The pin 47 is attached to a release lever 51 rotatably provided on the hinge pin 3.

Next, the operation of the above configuration will be described. (Reclining lock state) Normally, as shown in FIG.
By the biasing force of the springs 17, 17 ', 17 ", the rollers 13, 15, the rollers 13', 15 ', the rollers 13", 15 "
Presses against the inner peripheral surface of the hole 11 of the upper arm 9 and the outer peripheral surface of the rotor 5, and the rotation of the upper arm 9 is prohibited.

(Reclining lock released state)
When the operating portion 51a of the release lever 51 is rotated upward, the pressure plate 37 rotates and the disk 21 with the claw is rotated.
Moves in a direction away from the release lever 51.

In FIG. 7, the claw 23 is moved in the direction of arrow I between the triangular pieces 25 and 27 by the movement of the disc 21 with claws. When the claw 23 moves in the direction I, the distance between the roller 15 and the roller 13 ′, the distance between the roller 15 ′ and the roller 13 ″, and the distance between the roller 15 ″ and the roller 13 increase through the triangular pieces 25 and 27, and the rollers 13, 15, Rollers 13 ', 15', Roller 1
The pressed state between the 3 ", 15" and the outer peripheral surface of the rotor 5 is released, and the upper arm 9 (seat back) can be rotated.

When the desired rotation of the upper arm 9 (inclination of the seat back) is obtained, the release lever 51 is returned to the original position. Then, the state returns to the reclining lock state in which the rotation of the upper arm 9 is prohibited.

[0017]

However, the reclining device having the above configuration has the following problems.

(1) To release the reclining lock, the disk 21 with claws is moved in a direction away from the release lever 51. Generally, an operation portion of a seat release lever is provided on a side portion of a vehicle.

Therefore, in the above reclining device,
Due to a collision from the side of the vehicle or the like, the disc 21 with claws may move in a direction away from the release lever 51 (the operation unit 51a), and careless release of the reclining lock may occur.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a reclining device in which a reclining lock is not released even in a side collision of a vehicle.

[0021]

According to a first aspect of the present invention, a first arm provided on one of a seat cushion and a seat back and the other of the seat cushion and the seat back are provided. A second arm, a first arm, a hinge pin that supports relative rotation of the second arm, and a hinge pin that is provided on the first arm side and has the hinge pin as an axis. A cylinder, a disk provided in the second arm, located inside the cylinder, and forming at least one pair of wedge-shaped spaces in opposite directions between the outer peripheral surface and the inner peripheral surface of the cylinder; A rolling element disposed in each of the wedge-shaped spaces and movable in a circumferential direction of an inner peripheral surface of the cylinder; and pressing the rolling element against an inner peripheral surface of the cylinder and an outer peripheral surface of the disk. Biasing means for biasing in the direction; Moves in the axial direction of the hinge pin has the reclining lock releasing means for the rolling elements move in a direction away from the outer peripheral surface of the disk, and a release lever for driving the reclining lock releasing means,
When the release lever is operated in the reclining lock direction, the reclining lock releasing means moves in the direction of the operating portion of the release lever.

When the release lever is operated in the reclining lock releasing direction, the reclining lock releasing means moves toward the operating portion of the release lever. Conversely, the reclining lock is released when the reclining lock releasing means moves away from the operating portion of the release lever.

On the other hand, the operation section of the release lever of the seat is provided on the side of the vehicle. Therefore, even if there is a side collision of the vehicle and the impact force of the collision acts on the reclining lock releasing means, the reclining lock releasing means acts in the reclining lock direction. Does not happen.

According to a second aspect of the present invention, the hinge pin according to the first aspect is provided rotatably with respect to the first and second arms, and the release lever and the reclining lock releasing means are provided with the hinge pin. And the operating force applied to the release lever is transmitted to the reclining lock releasing means via the hinge pin.

Since the operating force on the release lever is transmitted to the reclining lock releasing means via the hinge pin, a member for transmitting the operating force on the release lever to the reclining lock releasing means becomes unnecessary.
The number of parts can be reduced.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. 1 is an exploded perspective view of a main part of the reclining device of the present invention, FIG. 2 is an exploded perspective view of a cylindrical portion of the upper arm of FIG. 1, FIG. 3 is a cross-sectional view of a seat provided with the reclining device shown in FIG. FIG. 2 is a view in the direction of arrow D in FIG. 1.

Although the reclining device of the present embodiment is provided on both sides of the seat, the structure is the same, so that the reclining device on one side will be described. (Overall Configuration) First, the overall configuration will be described with reference to FIG. In the drawing, reference numeral 100 denotes a seat slide device including a lower rail 101 provided on the floor side and an upper rail 103 movably provided on the lower rail 101 and provided with a sheet.

A seat back frame 300 is provided on the rotation end side of the upper arm 210, which is one of the arms of the reclining device 200.
The upper rail 103 of the seat slide device 100 is provided on the rotation end side of the lower arm 220, which is the other arm of the upper arm 103.
Are attached. Next, the reclining device 200 will be described with reference to FIGS.

1 and 2, the lower arm 220
The hinge pin 290 is rotatably engaged with the through hole 221 formed at the bottom. A cylindrical portion 230 is formed below the upper arm 210 so as to project in the direction of the lower arm 220 and to have a bottom surface 231 on the lower arm side.

A substantially triangular disk 240 is provided inside the cylindrical portion 230. Note that the shape of the disk 240 is set to a size that allows rotation within the cylindrical portion 230.

At the center of the disk 240, a cylindrical projection is engaged with the hole 233 of the cylindrical portion 230 of the upper arm 210 and attached to the lower arm 220 using four pins 243 and one spring hook pin 247. 241
Are formed.

Further, a hole 245 into which the hinge pin 290 is loosely fitted is formed in the center of the projection 241. Therefore, the upper arm 210 is centered on the hinge pin 290,
The lower arm 220 is rotatable.

As shown in FIG. 4, the disk 240 is disposed in the cylindrical portion 230 of the upper arm 210, so that the direction between the outer peripheral surface of the disk 240 and the inner peripheral surface of the cylindrical portion 230 is changed. Three approximately crescent-shaped spaces formed by two opposite wedge-shaped spaces are formed.

Incidentally, the disk 240 of this embodiment is
A flange portion 240a is formed in the hinge pin 290 direction. A roller 25 as a pair of rolling elements is provided in each space.
0,251 are provided, and these rollers 250,25
1 is a direction separated from each other by a spring 253, that is, the inner peripheral surface of the cylindrical portion 230 and the outer peripheral surface of the disk 240.
(Flange portion 240a).

Returning to FIG. 1 and FIG. 2, a disk with a claw and a pressure plate as reclining lock releasing means will be described. Adjacent to the disk 240, a disk 260 with claws is provided. The disc 260 with the nail has a hinge pin 29
Hinge pin 29 so that it can move along zero.
A hole 261 into which 0 is loosely fitted is formed at the center.

On the surface of the disk with claw 260 facing the disk 240, the disk is located between the rollers 250 and 251 provided with the top of the disk 240 interposed therebetween.
Three claws 263 having oblique sides facing 1 are formed.

As shown in FIG. 2, a triangular piece 26 is provided between the inclined surface of each claw 263 and the rollers 250 and 251.
5,267 are arranged. As shown in FIG. 1, a pressure plate 2 provided adjacent to the disc 260
An oval hole 271 into which the second oval portion 296 of the hinge pin 290 is fitted is formed at the center of the 70, and is prevented from falling off by an E-ring 275 that engages with the hinge pin 290.

Claw disk 26 of pressure plate 270
On the surface facing 0, three protrusions 273 having inclined surfaces are formed. The pressure plate 270 is also provided on the surface of the disk 260 with the claw facing the pressure plate 270.
The projection 273 can be in contact with the projection 273, and three projections 269 having an inclination opposite to the inclination of the slope of the projection 273 are formed.

The projection 269 is provided with a claw 263 in the circumferential direction.
It was provided in the same place as. Accordingly, the rotation of the pressure plate 270 of the reclining lock releasing means causes the claw disk 260 to advance and retreat along the hinge pin 290.

The hinge pin 290 has six parts. That is, the first cylindrical portion 291 that is loosely fitted into the through hole 221 of the lower arm 220 and the hole 245 of the disk 240
And a release lever 2 disposed on the lower arm 220
80 fits into the oval hole 281 and the tip is swaged.
Flange portion 292 which abuts on an oval portion 292 of the disk 240 and the inner bottom surface 231 of the disk 240 to prevent the hinge pin 290 from coming off.
3 and a second cylindrical portion 294 having a slot 295 formed therein.
A second oval portion 296 in which the oval hole 271 of the pressure plate 270 fits, and a third oval hole portion 401 of the connecting pipe 400 for transmitting the movement of the hinge pin 290 to the reclining device on the other side. And an oval section 297.

Therefore, when the release lever 280 is rotated about the hinge pin 290, the rotational force is increased.
90, the pressure is transmitted to the pressure plate 270 of the second oval portion 296 and the connecting pipe 400 of the third oval portion 297.

The lower arm 220 has a release lever 2
A pin 223 that engages with an arc-shaped guide hole 283 centered on a hinge pin 290 formed at 80 is provided upright to regulate the rotation range of the release lever 280.

The inner end is the slit 29 of the hinge pin 290.
4 and the outer end is locked by the spring hook pin 247, the spring plate 510 allows the pressure plate 270 to move the disc 260 with the claw into the release lever 280.
It is urged to rotate away from the (cylindrical portion 230) (reclining lock release direction).

A spring 540 whose inner end is locked by a bracket 520 attached to the lower arm 220 and whose outer end is locked by a bracket 530 attached to the upper arm 210 is used. Is biased in the forward falling direction.

Further, the lower arm 2 is attached to the upper arm 210 in order to regulate the tilt range of the upper arm 210.
20 is formed with an end 225a, 2 of a notch 225.
A cut-and-raised portion 211 that can be in contact with 25b is formed. Next, the operation of the above configuration will be described.

(Reclining lock state) Spring 5
By the urging force of 10, the pressure plate 270 is rotationally urged in a direction in which the disk 260 with the claw is separated from the release lever 280 (the cylindrical portion 230). That is, the rollers 250 and 251 press against the inner peripheral surface of the cylindrical portion 230 of the upper arm 210 and the outer peripheral surface of the disk 240, and the rotation of the upper arm 210 is prohibited.

(Reclining lock released state)
Release the operating part 280a of the release lever 280 with the spring 5
When rotated upward against the urging force of 10, the pressure plate 270 rotates via the hinge pin 290, and the disk 260 with the claw moves toward the release lever 280.

The rotation of the release lever 280 is also transmitted to the connecting pipe 400 and to the hinge pin of the reclining device on the other side. The movement of the disk 260 with the claw causes the claw 263 to move into the triangular pieces 265, 2
It moves to the release lever 280 between 67.

When the claw 23 moves in the direction of the release lever 280, the rollers 25 move through the triangular pieces 265 and 267.
0 and the roller 251, the distance between the rollers 250 and 2 increases.
The pressing state between the outer peripheral surface of the disk 51 and the outer peripheral surface of the disk 240 is released, and the upper arm 210 and the seat back frame 300 are released.
(Seat back) can be rotated.

When the desired rotation of the upper arm 210 and the seat back frame 300 (inclination of the seat back) is obtained, the operation force of the release lever 280 on the operation section 280a is released. Then, the release lever 280 and the pressure plate 270 are pressed by the urging force of the spring 510.
To the original position. When the pressure plate 270 returns to the original position, the disk 260 with the claw also moves in a direction away from the release lever 280, and returns to the reclining lock state.

According to the above configuration, the disk 260 with the claw as the reclining lock releasing means is provided with the hinge pin 290.
Is moved in a direction away from the release lever 280 along the arrow, thereby entering a reclining lock state.

On the other hand, generally, the release lever 2
The operation unit 280a of 80 is provided on the side of the vehicle. Therefore, there is a side collision of the vehicle,
Even if the impact force of the collision acts on the disc 260 with the claws, the force in the reclining lock direction acts on the disc 260, so that the careless release of the reclining lock does not occur.

In a conventional seat reclining device, a structure is often used in which the inner end of the pulling for urging the seat back in the forward leaning direction is locked by a hinge pin fixed to the upper arm side or the lower arm side. Have been.

When such a structure is employed in this embodiment, a mechanism for transmitting the movement of the release lever 280 to the pressure plate 270 so as not to interfere with other components is required, and the structure is complicated and the cost is increased. There is a problem.

In this embodiment, the inner end of the spring 540 for urging the seat back in the forward leaning direction is locked to the bracket 520 provided on the lower arm 220. And a rotatable structure.

The operation unit 2 of the release lever 280
The operating force applied to the release lever 280 is transmitted to the pressure plate 270 and the disk 260 with the pawl as the reclining lock releasing means via the hinge pin 290, thereby transmitting the operating force applied to the release lever 280 to the reclining lock releasing means. No members are required, and the number of parts can be reduced and cost can be reduced.

Further, the cylindrical portion 230 is attached to the upper arm 210.
The reclining lock strength can be improved by forming the flange portion 240a on the disk 240.

The claw 263 of the disk 260 with a claw and the projection 2
69 is provided at the same position in the circumferential direction, so that the disk with claw 260 can be efficiently moved along the hinge pin 290.

The present invention is not limited to the above embodiment. In the above embodiment, the disk 240 is provided on the upper arm 210 side, but the disk 240 may be provided on the lower arm 220 side.

The disk 240 has a substantially triangular shape, but is not limited to this. Any shape may be used as long as at least one pair of wedge-shaped spaces in opposite directions can be formed between the upper arm 210 and the inner peripheral surface of the cylindrical portion 230.

[0061]

As described above, according to the first aspect of the present invention, when the release lever is operated in the reclining lock releasing direction, the reclining lock releasing means moves toward the operating portion of the release lever.

In other words, the reclining lock is released by the reclining lock releasing means moving away from the operating portion of the release lever. On the other hand, the operation portion of the release lever for the seat is provided on the side of the vehicle.

Therefore, even if there is a side collision of the vehicle and the impact force of the collision acts on the reclining lock release means,
Since a reclining lock direction force acts on the reclining lock releasing means, careless release of the reclining lock does not occur.

According to the second aspect of the present invention, the operating force on the release lever is transmitted to the reclining lock releasing means via the hinge pin, so that the operating force on the release lever is transmitted to the reclining lock releasing means. A transmitting member is not required, and the number of parts can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a main part of a reclining device of the present invention.

FIG. 2 is an exploded perspective view of a cylindrical portion of the upper arm of FIG.

FIG. 3 is a sectional view of a seat provided with the reclining device shown in FIG. 1;

FIG. 4 is a view in the direction of arrow D in FIG. 1;

FIG. 5 is an exploded perspective view showing an example of a conventional reclining device.

FIG. 6 is a view for explaining the assembling of the upper arm and the rotor of FIG. 5;

FIG. 7 is a cross-sectional view taken along section line AA of FIG. 6;

FIG. 8 is a view for explaining the operation of the pressure plate of FIG. 5;

[Explanation of symbols]

 210 Upper arm 220 Lower arm 230 Cylindrical part 240 Disk 250, 251 Roller 253 Spring 260 Disk with claw 290 Hinge pin

Claims (2)

[Claims] A first arm provided on one of the seat cushion and the seat back; a second arm provided on the other of the seat cushion and the seat back; and the first arm; A hinge pin that supports relative rotation with the second arm; a cylinder provided on the first arm side and having the hinge pin as an axis; and a cylinder provided on the second arm and inside the cylinder. A disk that is located and forms at least one pair of wedge-shaped spaces whose directions are opposite to each other between an outer peripheral surface thereof and an inner peripheral surface of the cylinder; and an inner periphery of the cylinder disposed in each of the wedge-shaped spaces. A rolling element movable in a circumferential direction of the surface; an urging means for urging the rolling element in a direction of pressing against the inner peripheral surface of the cylinder and the outer peripheral surface of the disk; and moving in an axial direction of the hinge pin. And the rolling element is Reclining lock releasing means for moving in a direction away from the outer peripheral surface of the lock, and a release lever for driving the reclining lock releasing means. When the release lever is operated in the reclining lock releasing direction, the reclining lock releasing means is A reclining device characterized by moving in a direction of an operating portion of a release lever. 2. The hinge pin is rotatably provided with respect to the first and second arms. The release lever and the reclining lock release unit engage with the hinge pin, and operate the release lever. The reclining device according to claim 1, wherein the force is transmitted to the reclining lock releasing means via the hinge pin.