JP2004305549A - Reclining apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To mitigate the erection velocity of a seat back when the seat back is rotated and recovered from a flat position with a seat cushion after being inclined backward to an erected position being a normal seat state. <P>SOLUTION: Spiral springs 3 for energizing an erecting operation are attached to both the ends of the rotary shaft 2 of the seat back 1a. A reclining apparatus is equipped with a brake member 7, which stops the outward opening of the spiral springs 3 at a prescribed position and restricts the generation of the energizing force of spiral springs 3, in at least one of the spiral springs 3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relaxes the rising speed of the seat back when returning from a position where the seat back is moved backward and is in a flat state with the seat cushion to an upright position which is a normal seating state, thereby improving the sense of luxury. The present invention relates to a reclining device capable of performing a certain movement.
[0002]
[Prior art]
[Patent Document 1] JP-A-8-38290
2. Description of the Related Art Conventionally, for example, in a vehicle seat, a reclining device capable of lowering a seat back to a flat position with respect to a seat cushion is usually mounted. In this reclining device, the reclining lever is operated to return the seat back from the flat position to the upright position, which is a normal seating state. However, the seat back is rotated so as to automatically perform this rotation returning movement. The shaft has a structure in which spiral springs for biasing the rising operation are attached to both ends of the shaft.
However, since the biasing force of the spiral spring is quite strong, the rising speed of the seat back is fast, and the movement is rough and has no luxury.
[0004]
Therefore, as shown in Patent Document 1, a reclining device incorporating a rotary damper that gives a resistance to the rotation of the seat back so as to reduce the rising speed of the seat back has been proposed and put to practical use. . However, since the rotary damper is expensive, there is a problem that the manufacturing cost of the reclining device is high and that the assembling process is complicated.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention solves the above-described conventional problems, and seats used when a seatback is turned backward from a position in which the seatback is moved backward and is in a flat state with the seat cushion to an upright position which is a normal seating state. It has been completed with the aim of providing a reclining device that can reduce the rising speed of the back, can reduce the production cost, and can easily perform the assembling work. is there.
[0006]
[Means for Solving the Problems]
The reclining device of the present invention made in order to solve the above-mentioned problem is provided in such a manner that at least one of the upwardly-moving biasing spiral springs attached to both ends of the rotation shaft of the seat back has an outward direction of the spiral spring. And a brake member that stops the expansion of the spiral spring at a predetermined position and suppresses the subsequent generation of the biasing force of the spiral spring.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
The drawings show a case where the reclining device of the present invention is applied to an automobile seat. In FIG. 1, reference numeral 1 denotes a seat body including a seat back 1a and a seat cushion 1b, and reference numeral 2 denotes a seat body provided at a lower portion of the seat back 1a. The rotating shafts 3 are spiral springs attached to both ends of the rotating shaft 2 for urging the rising operation.
That is, the lock can be released by operating the lever and the seat back 1a can be reclined at an arbitrary angle. In particular, a position where the seat back 1a is tilted backward and is in a flat state with the seat cushion 1b (in the figure) To return from the normal seating state to the upright position (see the broken line in the drawing), which is a normal seating state, by the spring force (in the direction indicated by the arrow) of the spiral spring 3 for urging the rising operation. The configuration in which the seat back 1a is automatically raised is basically the same as the conventional reclining device.
[0008]
In the present invention, the outward expansion of the spiral spring 3 is applied to one of the spiral springs 3 attached to both ends of the rotation shaft of the seat back 1a for urging the rising operation at a predetermined position (S1). ), And a brake member for suppressing the generation of the biasing force of the spiral spring thereafter is provided.
With such a configuration, with a simple mechanism without using an expensive rotary damper, when the seat back 1a returns to rotation, the seat back 1a moves at a high speed up to a predetermined position, and thereafter slowly moves with the rising speed reduced. It gives the user an excellent feeling of use.
[0009]
Hereinafter, the mounting structure of the spiral spring 3 for urging the rising operation will be described.
FIG. 2 is an exploded perspective view of the reclining device of the present invention. In FIG. The ends 3a and 3b of the spiral spring 3 are engaged with an upper hook 5a and a lower hook 5b, respectively. Reference numeral 5c denotes a mounting surface of a brake member provided integrally with the lower hook 5b.
[0010]
Reference numeral 7 denotes a brake member attached so as to cover the spiral spring 3. The brake member 7 includes a top plate 7a, a brake surface 7b suspended from the top plate 7a, and a mounting piece 7c to the reclining lower 4b. Consists of 7d is a hole for inserting the mounting piece 7c.
The distance of the brake surface 7b is designed so that the outward expansion of the spiral spring 3 is stopped at a predetermined position (S1) and the subsequent generation of the upward biasing force of the spiral spring is suppressed.
[0011]
That is, as shown in FIG. 3, when the seat back 1a is lowered to the flat position with respect to the seat cushion 1b, the spiral spring 3 is in a state of being contracted to the maximum, and its outer diameter surface is a brake surface. 7b has a slight gap with the inner surface.
Then, when the lock is released by operating the lever, the seat back 1a is automatically rotated toward the upright position, which is a normal seating state, by the rising operation biasing force of the spiral spring 3. That is, when the spiral spring 3 in the compressed state is released, the end 3a moves counterclockwise by moving in the direction of expanding the outer diameter, and the upper hook 5a engaged with the end 3a accordingly. Similarly, when the seat back 1a rotates counterclockwise, the seat back 1a automatically rotates.
[0012]
In the present invention, since the spiral spring 3 is covered by the brake member 7 having the brake surface 7b, as shown in FIGS. 4 and 5, when the outer diameter of the spiral spring 3 expands to a predetermined size, The further expansion is impeded on the brake surface 7b. As a result, the subsequent generation of the biasing force of the spiral spring 3 is suppressed, and thereafter, the seat back 1a is rotated only by the biasing force of the other spiral spring 3 without the brake member 7, so that the seat The rising speed of the back 1a is halved, resulting in a supple, high-class movement.
Although the brake member 7 is provided on one of the spiral springs 3 in the drawing, the brake member 7 is provided on both sides so that the biasing force of the spiral spring 3 is in contact with the spring cushion 3 to such an extent that it is weakened by a free cushion (frictional force). Alternatively, the rising speed of the seat back 1a may be suppressed.
[0013]
As described above, the present invention relates to a reclining device capable of lowering a seat back 1a to a flat position with respect to a seat cushion 1b, and a spiral for urging a rising operation attached to both ends of a rotation shaft of the seat back 1a. One of the springs 3 is provided with a brake member that stops the outward expansion of the spiral spring 3 at a predetermined position (S1 in FIG. 1) and suppresses the subsequent generation of the biasing force of the spiral spring 3. Therefore, when the seat back 1a is turned back from the position where the seat back 1a is lowered and is in a flat state with the seat cushion 1b to the upright position (S2 in FIG. 1) which is a normal seating state, the seat back 1a Is quickly rotated to the position of S1 by the rising operation biasing force of the two spiral springs 3, but from S1 to S2 Since the position to be suppressed the occurrence of the urging force of one of the spiral spring 3, the motion of luxury raised up speed is reduced.
In addition, since a rotary damper is not used unlike the related art, there is an advantage that the production can be performed at low cost and the assembling operation can be performed easily and in a short time.
[0014]
【The invention's effect】
As is apparent from the above description, the present invention raises the seat back when the seat back is rotated backward from the position where the seat back is moved backward and is flat with the seat cushion to the upright position where the seat is normal. The rising speed can be reduced, the production cost can be reduced, and the assembling operation can be easily performed.
Therefore, the present invention greatly contributes to industrial development as a reclining device that has eliminated the conventional problems.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of the present invention.
FIG. 2 is an exploded perspective view showing the embodiment of the present invention.
FIG. 3 is an explanatory view showing a spiral spring in a state in which a seat back is folded down flat.
FIG. 4 is an explanatory view showing a state in which a brake surface is in contact with a spiral spring.
FIG. 5 is a cross-sectional view showing an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Seat main body 1a Seat back 1b Seat cushion 2 Rotating shaft 3 Spiral spring 4a Reclining upper 4b Reclining lower 5a Upper hook 5b Upper lower 7 Brake member 7b Brake surface

Claims (1)

At least one of the spiral springs for urging operation, which is attached to both ends of the rotation shaft of the seat back, stops the outward expansion of the spiral spring at a predetermined position and attaches the subsequent spiral spring. A reclining device comprising a brake member for suppressing generation of power.

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