KR101763159B1 - Apparatus for tilting the back of chair - Google Patents

Abstract

The present invention relates to an apparatus for tilting a back of a chair, which can be used by setting a force required for tilting according to each user such as a child, a senior citizen, an adult or the like. To this end, according to the present invention, the apparatus for tilting a back of a chair comprises: a support rod, a torsion spring, a first torque control means, a second torque control means and a hinge connection device. The support rod crosses a lower part of a seat plate. The torsion means comprises: a torsion bar positioned inside the support rod; a first torsion rubber and a second torsion rubber, which are axially coupled to one side of the torsion bar to be spaced apart from each other to generate a rotation torque; a first metal ring covering the outer circumference of the first torsion rubber and having a support hole formed on the outer circumferential surface thereof; and a second metal ring covering the outer circumference of the second torsion rubber and having a plurality of tilting angle setting holes formed on the outer circumferential surface thereof to be arranged in a circumferential direction. The first torque control means comprises: a support device passing through a first slit hole formed on the outer circumferential surface of the support rod in a circumferential direction to be coupled to the support hole of the first metal ring; and an adjustment screw coupled to an extended piece integrally formed on the outer circumferential surface of the support rod through a screw to pressurize one side of the support device. The second torque control means includes a tilting angle setting pin, which passes through a second slit hole formed on the outer circumferential surface of the support rod in a circumferential direction to be selectively coupled to any one of the plurality of tilting angle setting holes formed on the outer circumferential surface of the second metal ring. The hinge connection device is inserted into an end of the support rod to be rotated at a predetermined angle to be coupled the other side of the torsion bar and is connected to a back-support frame.

Description

[0001] APPARATUS FOR TILTING THE BACK OF CHAIR [0002]

The present invention relates to a tilting apparatus for a chair, and more particularly, to a tilting apparatus for a chair which can adjust an initial rotational torque for tilting a back plate and can set a force required for tilting for each user such as a child, The present invention relates to a chair tilting apparatus.

In general, the conventional chair is provided with a caster 2 at the end of the caster rest 1 so as to turn or position the chair as shown in Fig. A support pipe 3 is vertically installed at the center of the castor pedestal 1 and an extension pipe 5 for adjusting the height of the seat 4 is installed in the support pipe 3. A pipe frame 7 is provided on the right and left sides of a foot plate 6 for supporting the chair seat 4 and an armrest 8 is provided on the upper portion of the pipe frame 7, respectively. A back plate 9 is provided on the back side of the bed plate 6, that is, behind the bed sheet 4 so as to maintain a predetermined angle with respect to the bed sheet 4.

In the conventional chair constructed as described above, when the user is sitting on the chair seat 4 and the upper body is turned back to relax the physical tension or fatigue during the work, the elastic chair (not shown) The back plate 9 is tilted backward by a predetermined angle while being displaced toward the rear as the body weight of the upper body is transmitted and the back plate 9 is returned to its original position by the restoring force of the elastic body have.

However, the above-described conventional chair has a problem in that the structure for tilting the back plate is complicated and difficult to implement.

In order to solve the above-mentioned problem, Korean Patent Laid-Open No. 10-2011-0065259 discloses a tilting of the back plate by providing a coil spring and a sliding block on a support rod across the lower portion of the seat plate, Thereby reducing the number of components and reducing manufacturing costs.

Specifically, the backing tilting device includes a support bar 12 which crosses a lower portion of a seat plate, a coil spring 120 inserted in the support bar, a spring stop block 130 installed on one side of the coil spring, And a connection block 150 installed on the outside of the sliding block and connected to the back plate to press the sliding block according to the rotation of the back plate.

However, since the tilting apparatus is provided with a tilting restoring force by one coil spring 120, the tilting apparatus can not smoothly operate when the user tilts the back plate. When the chair is used for a long time, There is a problem that rust is generated on the outer circumferential surface of the coil spring 120 or the noise is gradually generated so that the parts are periodically replaced.

Korean Patent Laid-Open No. 10-2011-0065259 (Published Date June 15, 2011)

It is an object of the present invention to solve the above problems of the prior art, and it is an object of the present invention to provide a chair capable of adjusting an initial rotation torque for tilting the back plate, and setting a force required for tilting for each user such as a child, And a tilting device.

According to an aspect of the present invention, there is provided a backbone tilting apparatus comprising: a support bar crossing a lower portion of a seat; A first torsion rubber and a second torsion rubber axially coupled to one side of the torsion bar so as to be spaced apart from each other and axially coupled to generate a rotational torque, a first torsion rubber surrounding the outer circumference of the first torsion rubber, A torsion means including a first metal ring having a support hole formed therein and a second metal ring surrounding the outer periphery of the second torsion rubber and having a plurality of tilting angle setting holes arranged in the circumferential direction on the outer circumferential surface; A support ring coupled to the support hole of the first metal ring through a first slit hole formed in a circumferential direction on the outer circumferential surface of the support rod, A first torque regulating means including an adjusting screw for pressurizing; And a tilting angle setting pin that is selectively coupled to any one of a plurality of tilting angle setting holes formed in an outer circumferential surface of the second metal ring through a second slit hole formed in a circumferential direction on an outer circumferential surface of the support rod, Way; And a hinge connector which is rotatably inserted into an end of the support rod at a predetermined angle and is coupled to the other side of the torsion bar and connected to the back plate support frame.

Preferably, the adjusting screw is configured to be positioned forward of the support, and the support may be pushed backward to adjust the rotation torque in accordance with rotation of the adjustment screw.

Preferably, the second slit hole is formed at an angle corresponding to the range of the rotatable angle of the hinge connector, and the plurality of tilting angle setting holes may be formed corresponding to at least one side and the other side of the second slit hole, respectively .

Preferably, at least one tilting angle setting hole may be formed between the tilting angle setting hole corresponding to one side of the second slit hole and the tilting angle setting hole corresponding to the other side of the second slit hole.

Preferably, a cutout groove is formed at an end of the support bar for limiting a rotation angle of the hinge connector.

Preferably, the forming width of the first torsion rubber and the first metal ring are the same, the forming width of the second torsion rubber and the second metal ring are the same, and the forming width of the second torsion rubber, The formation width of the rubber can be made wider.

The present invention as described above has an advantage that the initial rotational torque for tilting the back plate can be adjusted and the force required for tilting can be set for each user such as a child, a senior citizen, and an adult.

1 is a view showing an example of a conventional chair.
2 is a view showing another example of a conventional chair.
3A and 3B are perspective views illustrating a chair having a backboard tilting apparatus according to an embodiment of the present invention.
4 is an exploded perspective view illustrating a chair including a backboard tilting apparatus according to an embodiment of the present invention.
5A and 5B are views for explaining an operating state of a chair with a backrest tilting apparatus according to an embodiment of the present invention set for a child.
6A to 6C are views for explaining an operating state in a state where a chair provided with a backboard tilting apparatus according to an embodiment of the present invention is set for a senior citizen.
FIGS. 7A and 7B are views for explaining an operating state in a state where a chair equipped with a backboard tilting apparatus according to an embodiment of the present invention is set for adult use.

The present invention may be embodied in many other forms without departing from its spirit or essential characteristics. Accordingly, the embodiments of the present invention are to be considered in all respects as merely illustrative and not restrictive.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", "having", and the like are intended to specify the presence of stated features, integers, steps, operations, components, Steps, operations, elements, components, or combinations of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and a duplicate description thereof will be omitted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

3A, 3B and 4, the chair according to an embodiment of the present invention includes a body portion, a torsion means 200, a first torque adjusting means 300, a second torque adjusting means 400 , And a hinge connector (500).

The main body part is a part constituting the whole part of the chair and includes a supporting frame 100, a caster 130, a backrest supporting frame 140, and an armrest frame 150.

The support frame 100 includes a support rod 110 which crosses a lower portion of a seat plate and four leg rods 120 extending from the both sides of the support rod 110 toward the front lower side and the rear lower side.

The supporting frame 100 is formed in a hollow tube shape so that its ends are opened. At both ends of the supporting bar 110, a cutting groove 112 for limiting a rotation angle of the hinge connector 500 is formed.

Therefore, the rotation range of the hinge connector 500 is restricted so that the hinge connector 500 can rotate only within the range of the cutout groove 112.

The casters 130 are provided at the lower ends of the four leg rods 120, respectively.

The backing support frame 140 is assembled to be integrated with the hinge connector 500 and can be tilted rearward by a pushing force of the back of the user. And is the same as the tilting range of the hinge connector 500.

For example, when the user sits on the seat of the chair to relax the physical tension or fatigue while performing the task, when the upper body is brought into close contact with the backing support frame 140 and the backrest is turned back, the weight of the upper body is transferred to the backing support frame 140 So that the back support frame 140 is tilted backward by a predetermined angle with respect to the support bar 110 while the back of the user is displaced toward the back.

One end of the armrest frame 150 is rotatably assembled to an end of the support bar 110. The other end of the armrest frame 150 is rotatably assembled to an intermediate portion of the backrest support frame 140, The armrest frame 150 rotates at both ends with the tilting of the backing plate support frame 140.

Each of the torsion means 200 includes a pair of torsion bars 210, a first torsion rubber 221, a first metal ring 231 A second torsion rubber 222, and a second metal ring 232.

The first torsion rubber 221 and the second torsion rubber 222 are spaced apart from each other at one side of the torsion bar 210 The first metal ring 231 is provided so as to surround the outer circumference of the first torsion rubber 221 and the second metal ring 232 is provided to surround the outer circumference of the first torsion rubber 221, So as to surround the outer periphery of the torsion rubber 222.

The torsion bar 210, the torsion bar 210, the first torsion rubber 221, the first metal ring 231, the second torsion rubber 222 and the second metal ring 232 are integrally formed The first torsion rubber 221 and the second torsion rubber 222 are integrally formed on one side of the torsion bar 210 and the first torsion rubber 221 and the second torsion rubber 222 are integrally formed. And a second metal ring 232 may be integrally formed on the outer periphery of the second torsion rubber 222. [

The second torsion rubber 222 and the second metal ring 232 may have a greater width than the first torsion rubber 221 and the first metal ring 231, So as to make it possible to limit the angles for use as will be described later. That is, the torque value of the second torsion rubber 222 is set to be large to make tilting difficult.

On the other hand, a support hole 231h is formed on the outer circumferential surface of the first metal ring 231, and a plurality of tilting angle setting holes 232h-1 and 232h -2, and 232h-3 are formed.

When the torsion bar 210 and the first metal ring 231 are rotated relative to each other, the torsion bar 210 and the first metal ring 231 rotate relative to each other, The first torsion rubber 221 is twisted to generate the first torque and when the torsion bar 210 and the second metal ring 232 rotate relative to each other, The second torsion rubber 222 between the two metal rings 232 is twisted to generate the second torque.

The second torsion rubber 222 and the second metal ring 232 are formed to have a greater width than the first torsion rubber 221 and the first metal ring 231, (210) and the first metal ring (231) and the relative rotation amount between the torsion bar (210) and the second metal ring (232) are equal to each other, the second torque The torque has a larger value.

The first torque adjusting means 300 is a adjusting means for setting an initial value of the first torque generated from the first torsion rubber 221 and includes a support 310 and an adjusting screw 320, do.

The support 310 is screwed to the support hole 231h of the first metal ring 231 through a first slit hole 110h1 formed in a circumferential direction on the outer circumferential surface of the support rod 110, The protruded outer end of the support 310 may be formed in the shape of a rectangular block.

The first slit hole 110h1 may be formed at a corresponding angle of the support rod 110 corresponding to the first metal ring 231 in a predetermined angle range.

The adjusting screw 320 is positioned forward of the support 310 and the support 310 is pushed backward in accordance with the rotation of the adjusting screw 320 to adjust the rotation torque.

Specifically, the adjusting screw 320 is screwed to an extension piece 111 integrally formed on an outer circumferential surface of the support rod 110. The end of the adjusting screw 320 presses the protruded outer end of the support 310, .

At this time, the first torsion rubber 221 is engaged with the first torque adjusting means 300 to generate a predetermined first torque.

Accordingly, when the adjusting screw 320 is rotated in one direction to further press the protruding outer end of the support 310, the initial value of the first torque generated by the first torsion rubber 221 is set to be high And when the adjusting screw 320 is rotated in the other direction so that the protruded outer end of the support 310 is pressed to a smaller extent, the initial value of the first torque generated by the first torsion rubber 221 is set to Can be set low.

The second torque adjusting means 400 includes adjustment means for setting the magnitude of the second torque generated by the second torsion rubber 222 and includes a tilting angle setting pin 410.

The tilting angle setting pin 410 penetrates through a second slit hole 110h2 formed in the circumferential direction on the outer circumferential surface of the support rod 110 and has a plurality of tilting angle setting holes (not shown) formed on the outer circumferential surface of the second metal ring 232 232h-1, 232h-2, and 232h-3.

The second slit hole 110h2 may be formed at a corresponding portion of the support rod 110 corresponding to the second metal ring 232 at an angle corresponding to the range of the rotatable angle of the hinge connector 500. [

The plurality of tilting angle setting holes 232h-1, 232h-2, and 232h-3 are formed corresponding to one side and the other side of the second slit hole 110h2, respectively, and at least one tilting angle In this embodiment, the first tilting angle setting hole 232h-1, the second tilting angle setting hole 232h-2, and the third tilting angle setting hole 232h-3 may be formed. And three tilting angle setting holes are formed.

The assembling relationship of the tilting angle setting pin 410 and the plurality of tilting angle setting holes 232h-1, 232h-2 and 232h-3 will be further explained in the description of the operation of the tilting apparatus of this embodiment .

The hinge connector 500 includes a hinge portion 510 and an arm portion 520.

The hinge part 510 is rotatably inserted into the end of the support rod 110 within the range of the cutout groove 112 (the range of? Degrees in FIG. 5B) And the other side is united.

The arm 520 is coupled to the lower end of the backboard support frame 140. When the backboard support frame 140 is tilted backward due to a pushing force of the back of the user, And the torque of the torsion bar 210 is rotated. By the rotation of the torsion bar 210, any one of the first torque and the second torque may be generated, or both types of torque may be generated.

Hereinafter, the setting and operation of each mode of the chair according to one embodiment of the present invention constructed as described above will be described.

① Mode setting

5A, the tilting angle setting pin 410 has a first tilting angle setting hole 232h-1 formed corresponding to one side of the second slit hole 110h2, And assembled.

As described above, when the mode is set to the idle mode, the state in which the tilting angle setting pin 410 is hooked on one side of the second slit hole 110h2 becomes the initial state.

Therefore, in order to allow the user to tilt the backing support frame 140 within the tilting range of the backing support frame 140, as shown in FIG. 5B, all of the first torsion rubber 140 in the angular range The first torque of the first torsion rubber 221 and the second torque of the second torsion rubber 222 act simultaneously and a large force is required for tilting.

Accordingly, it becomes difficult for the children with weak strength to tilt the backing support frame 140 from the beginning, thereby preventing a safety accident due to the tilting of the backing support frame 140.

② Setting the elderly and female mode

6A, the tilting angle setting pin 410 has a second tilting angle setting hole 232h-2 formed corresponding to a central portion of the second slit hole 110h2, As shown in Fig.

6B, when the tilting angle setting range is set to the tilting angle range? 1 before the tilting angle setting pin 410 is hooked to one side of the second slit hole 110h2, as shown in FIG. 6B, The second torque of the second torsion rubber 222 does not act.

Therefore, when the user tilts the backing support frame 140 within the tilting range of the backing support frame 140, until the tilting angle setting pin 410 is hooked to one side of the second slit hole 110h2 Only the first torque of the first torsion rubber 221 is generated and the second torque of the second torsion rubber 222 is not generated.

6C, if the tilting angle setting pin 410 continues tilting after an angular range? 1 ° which is latched by one side of the second slit hole 110h2, the tilting angle setting range the first torque of the first torsion rubber 221 and the second torque of the second torsion rubber 222 are both exerted, and a large force is required for tilting.

Accordingly, it is difficult for the elderly and women who are relatively weak in strength compared to the adult male to tilt the backing support frame 140 further after the backing support frame 140 is tilted at a predetermined angle, The support frame 140 can be tilted to prevent a safety accident.

③ Adult male mode setting

In the case of the adult male mode, the tilting angle setting pin 410 is inserted and assembled into a third tilting angle setting hole 232h-3 formed corresponding to the other side of the second slit hole 110h2.

As described above, when the mode is set to the adult male mode, the second torque of the second torsion rubber 222 does not act until the tilting angle setting pin 410 is hooked to one side of the second slit hole 110h2 .

Therefore, when the user tilts the backing support frame 140 within the tilting angle range? ° of the backing support frame 140, the tilting angle setting pin 410 is tilted at one side of the second slit hole 110h2 Only the first torque of the first torsion rubber 221 is generated and the second torque of the second torsion rubber 222 is not generated.

Therefore, the adult male can easily tilt the backing support frame 140 within the entire tilting angle range ([alpha] [deg.]).

Although the present invention has been described with reference to the preferred embodiments thereof with reference to the accompanying drawings, it will be apparent to those skilled in the art that many other obvious modifications can be made therein without departing from the scope of the invention. Accordingly, the scope of the present invention should be interpreted by the appended claims to cover many such variations.

100: support frame 110: support rod
110h1: first slit hole 110h2: second slit hole
111: extension piece 112: incision groove
120: leg rods 130: casters
140: backrest supporting frame 150: armrest frame
200: Torsion means 210: Torsion bar
221: first torsion rubber 222: second torsion rubber
231: first metal ring 231h: support hole
232: second metal ring 232h-1: first tilting angle setting hole
232h-2: second tilting angle setting hole 232h-3: third tilting angle setting hole
300: first torque adjusting means 310:
320: adjusting screw 400: second torque adjusting means
410: tilting angle setting pin 500: hinge connector
510: hinge part 520:

Claims (6)

A support bar across the bottom of the seat;
A first torsion rubber and a second torsion rubber axially coupled to one side of the torsion bar so as to be spaced apart from each other and axially coupled to generate a rotational torque, a first torsion rubber surrounding the outer circumference of the first torsion rubber, A torsion means including a first metal ring having a support hole formed therein and a second metal ring surrounding the outer periphery of the second torsion rubber and having a plurality of tilting angle setting holes arranged in the circumferential direction on the outer circumferential surface;
A support ring coupled to the support hole of the first metal ring through a first slit hole formed in a circumferential direction on the outer circumferential surface of the support rod, A first torque regulating means including an adjusting screw for pressurizing;
And a tilting angle setting pin that is selectively coupled to any one of a plurality of tilting angle setting holes formed in an outer circumferential surface of the second metal ring through a second slit hole formed in a circumferential direction on an outer circumferential surface of the support rod, Way; And
And a hinge connector inserted into the end of the support rod to be rotatable at a predetermined angle and coupled to the other side of the torsion bar and connected to the back plate support frame. The method according to claim 1,
Wherein the adjusting screw is configured to be positioned forward of the supporting portion, and the supporting portion is pushed rearward in accordance with rotation of the adjusting screw to adjust the rotating torque. The method according to claim 1,
Wherein the second slit hole is formed at an angle corresponding to a rotatable angle range of the hinge connector, and the plurality of tilting angle setting holes correspond to at least one side and the other side of the second slit hole, Device. The method of claim 3,
Wherein at least one tilting angle setting hole is formed between a tilting angle setting hole formed corresponding to one side of the second slit hole and a tilting angle setting hole formed corresponding to the other side of the second slit hole. The method according to claim 1,
And a cutout groove is formed at an end of the support bar to limit a rotation angle of the hinge connector. The method according to claim 1,
Wherein a width of the first torsion rubber and that of the first metal ring are the same and a width of the second torsion rubber and the second metal ring is the same, And the width is wider.

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