JPH10327938A - Angle adjusting device for folding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an angle adjusting device for folding in which an angle of a leg part or a seat back rest is adjustable. SOLUTION: An angle adjusting device A is provided with an engagement member 8 disposed over a first receiving member 5 in which a first engagement recessed part 4 is formed and a second receiving member 7 in which a second engagement recessed part 6 is formed. It is also provided with an elastic member 10 to energize the engagement member 8 toward a receiving seat 9 of the second engagement recessed part 6, and a push rod 11 to release engagement of the engagement 8 with the second engagement recessed part 6 against the elastic member 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding angle adjusting device. More particularly, the present invention relates to a folding angle adjusting device capable of adjusting an angle of a leg of a folding desk or a backrest of a folding chair.

[0002]

2. Description of the Related Art Conventionally, for example, at the time of legal affairs, a desk on which a bell or a censer is placed has been used. When the ceremony is over, the desk is usually cleared up in a closet or the like, so that a folding angle adjusting device that is not bulky, can be stored in a small space, and is convenient for movement is often used. As shown in FIGS. 6 and 7, such a foldable desk includes a desk main body 50 and a leg portion 51, and the leg portion 51 can be folded by a hinge 52. A long stopper 53 is provided between the legs 51 to prevent the legs 51 from bending during use and the object on the desk from rolling down.

A stopper 53 of such a folding desk is rotatable by a support pin 55 inserted into a support portion 54. When the desk is used, when the leg portion 51 stands on both sides, the stopper 53 is turned on. It can be rotated by its own weight between the legs 51, and after use, the stopper 53
Is rotated in the lateral direction S so that the leg portion 51 can be stored.

[0004]

However, in the folding desk, the hinges 52 and the stoppers 53 make the legs 5.
The appearance is not good because the opening angle of 1 is adjusted. When the folding chair is constituted by such hinges and stoppers, the angle of the backrest is fixed and cannot be adjusted.

The present invention has been made in view of the above circumstances, and has as its object to provide a folding angle adjusting device capable of adjusting an angle of a leg or a backrest.

[0006]

A folding angle adjusting device according to the present invention comprises a first receiving member having a first engaging concave portion and a second receiving member having a second engaging concave portion. And an elastic member for urging the engaging member toward the receiving seat side of the second engaging concave portion, and the engaging member against the elastic member. It is characterized by comprising a push rod for releasing the engagement with the second engagement recess.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A folding angle adjusting device according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing an embodiment of a folding desk using the angle adjusting device of the present invention, FIG. 2 is a side view of the folding desk in FIG. 1, and FIG. FIG. 4 is a perspective view of an engaging member in FIG. 3, and FIG. 5 is a perspective view showing another embodiment of the engaging member.

As shown in FIGS. 1 to 3, the foldable desk comprises a flat desk body 1 and a leg 2 composed of a pair of legs 2a and 2b, and is fixed to the back of the desk body 1. Individual support 3
And the leg 2 are connected by an angle adjusting device A. By releasing the lock of the angle adjusting device A, the leg 2 can be folded with respect to the desk body 1.

In the present embodiment, the support portion 3 and the leg portion 2 are connected at four places in four directions by four angle adjusting devices A. However, the present invention is not limited to this. Only one of the legs in the pair of left and right legs 2, for example, the leg 2 a is connected by the angle adjusting device A, and the other leg 2 b
Can be made rotatable by a support pin.

The angle adjusting device A includes a first receiving member 5 having a first engaging recess 4 formed thereon and a second receiving member 7 having a second engaging recess 6 formed therein. And an engagement member 8 disposed in the second engagement recess 6
An elastic member 10 such as a coil spring or a disc spring biasing toward the receiving seat 9 side, and the engagement between the engaging member 8 and the second engaging concave portion 6 is released against the elastic member 10 (not engaged). A push rod 11 having a cylindrical shape for engaging (engaging) can be used. The first receiving member 5 is fitted in a recess 12 or a hole formed in the leg 2a, and the second receiving member 7 is fitted in a recess 13 or a hole formed in the support portion 3. However, the present invention is not limited to this. For example, a first engagement portion is formed on the leg 2a, the leg 2a is used as a first receiving member, and the support portion 3 is provided with a second engagement recess. And the support portion 3 can be used as a second receiving member. 3a and 7a are through holes through which the push rod 11 passes.

As shown in FIG. 4, the engaging member 8 has a quadrangular polygonal cross section. However, the present invention is not limited to this. For example, a polygonal surface such as a triangle or a pentagon may be used. Or, as shown in FIG. 5, it is shaped like a tooth 14 or a spline. Similarly, the inner diameters of the first and second engagement recesses 4 and 6 are also polygonal surfaces or teeth that engage with the engagement members 8. For example, in the case of a square plane, angle adjustment at a 90 ° pitch can be performed. In the case of a tooth profile, finer adjustments can be made as the tooth pitch increases, so that it can be suitably used particularly for a chair back.

On the back surface of the engaging member 8, a pocket 15 is formed for holding the elastic member 10 and preventing the elastic member 10 from shifting.

In the present embodiment, when the push rod 11 is pushed (pushed) with a finger, the engaging member 8 moves into the first engaging recess 4 and engages with the second engaging recess 6. (Lock) is released. Accordingly, the leg 2 is released from the restraint, so that the leg 2 can be folded while rotating the leg 2 and the engaging member 8. Further, in this embodiment, since the first and second engaging recesses 4 and 6 are opposed to each other even after the leg 2 is rotated by approximately 90 degrees and folded, when the pushing of the push rod 11 is stopped, the engaging member 8 is an elastic member 10
, And re-engage with the second engagement recess 6. Therefore, even when the desk is lifted, the leg 2 does not hang down due to its own weight. Therefore, carrying of the desk and storage by vertical stacking are easily performed.

In the present embodiment, when the leg 2 is folded and the leg 2 is opened, the engaging member 8 is made to rotate easily without interfering with the second engaging concave portion 6. Preferably, the rotation guide 16 is interposed between the engagement member 8 and the push rod 11 so that the engagement member 8 can rotate smoothly. The surface shape of the rotation guide 16 can be a smooth surface such as a conical surface or a spherical surface. When the surface shape of the rotation guide 16 is made smooth, it is preferable in terms of processing that the receiving seat 9 is also made smooth such as the conical surface.

[0016]

As described above, according to the present invention,
Since the angle can be adjusted by the engaging member and the engaging concave portion, a desk or a chair having a folding function can be easily manufactured, and the processing cost can be reduced because the stopper and the hinge serve both as the conventional stopper. In addition, the appearance of the equipment is improved because the equipment is installed in a product such as a desk.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a folding desk using the angle adjusting device of the present invention.

FIG. 2 is a side view of the folding desk in FIG.

FIG. 3 is an enlarged view of a main part drawing showing the angle adjusting device.

FIG. 4 is a perspective view of an engagement member in FIG. 3;

FIG. 5 is a perspective view showing another embodiment of the engaging member.

FIG. 6 is a front view showing a conventional folding desk.

FIG. 7 is a sectional view of the folding desk taken along line II in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Desk main body 2 Leg part 2a, 2b Leg 3 Support part 4 First engagement concave part 5 First receiving member 6 Second engaging concave part 7 Second receiving member 8 Engaging member 9 Receiving seat 10 Elastic member 11 Push rod 15 Pocket 16 Rotation guide A Angle adjustment device

Claims (4)

[Claims] A first receiving member having a first engaging recess and a second receiving member having a second engaging recess; The engaging member is connected to the second
And a push rod for releasing the engagement between the engagement member and the second engagement recess against the elastic member. Angle adjustment device. 2. The angle adjusting device according to claim 1, wherein the first and second engagement recesses and the engagement member are formed in a polygonal surface or a tooth shape. 3. The angle adjusting device according to claim 1, wherein the engagement member and the push rod are connected via a rotation guide. 4. The angle adjusting device according to claim 3, wherein the receiving seat and the rotation guide are formed as smooth surfaces.