KR101357521B1 - Tension device of chair - Google Patents

Abstract

The present invention relates to a tension device for a chair, and more specifically, a spring is installed between a seat and a base of a chair to have a cushioning property that is movable in up and down and left and right directions and to adjust elasticity of the spring. A spring 10 mounted to the bottom; An upper support member 20 having a spring fixing end 21 connected to an upper portion of the spring at a lower end thereof, and having a seat 24 installed thereon; A wire 30 penetrating the inner side of the spring; A stopper 40 fixed to the upper support member 20 while fixing the upper end of the wire; A lower support member (50) formed at a top thereof with a spring fixing end (51) connected to a lower portion of the spring, and having a lifting hole (52) drilled up and down at a center thereof and bound to a pedestal of a chair; A lifting bolt 60 penetrating the lifting hole in a state where the lower end of the wire is fixed and a screw thread is formed on an outer surface thereof; Adjusting nut 70 is screwed with the lower portion of the elevating bolt protruding to the lower support member to enable the elevating bolt to move up and down when rotated; Provided is a chair tension device characterized in that the combination of.

Description

Tension device for chairs {TENSION DEVICE OF CHAIR}

The present invention relates to a tension device for chairs, and more specifically, is installed in the lower part of the seat of the chair to allow the seat to flow in the left and right and up and down directions, the tension for the chair to be able to arbitrarily adjust the elasticity according to the user's taste Relates to a device.

In general, the chair is composed of a seat that can be seated by the user and a support for spaced apart from the ground by a predetermined distance from the bottom of the seat to provide a sense of stability. Also installs. In addition, in order to be able to adjust the height of the seat of the chair to install a gas spring on the post of the support to be able to adjust the height according to the user's body shape.

However, the chair of such a structure has a disadvantage in that there is no cushion feeling because it does not give elasticity to the seat, and in order to compensate for this disadvantage, Korean Utility Model Publication No. 1995-0008833 (Patent Document 1) is located at the upper inlet of the outer tube. Insert the bushing and weld the screening plate with guide hole in the center at the lower part, and insert the inner tube through the bushing center hole, and the connecting rod fastened to the lower connection part of the inner pipe tube protrudes outside the center guide hole through the center guide hole of the screen. Insert the washer made of resin and the metal washer in turn, and then support the snap ring in the annular groove, insert the thrust bearing inside the step of the connecting rod, and extend the coil spring between the thrust bearing and the cover plate. I have suggested.

However, Patent Document 1 has the advantage of providing cushioning properties to the seat, but there is a problem that can not adjust the strength of the cushion, there is a disadvantage that the degree of cushion is different, especially when a person with a large weight is sitting.

That is, some people like to have a cushion when seated in a chair according to the user's taste, while others do not. However, when the elastic size cannot be adjusted, various requirements of the user cannot be satisfied. In addition, when a small person is seated, a relatively small pressure is applied, so the compression or fluidity of the spring is inevitably small, and thus the cushioning feeling cannot be sufficiently felt.

In another prior art, Korean Patent Laid-Open Publication No. 2009-0053439 (Patent Document 2) is to support a chair from the bottom, the handle insertion hole 120 penetrated up and down in the center is formed, the handle insertion hole 120 A support device 100 having a lower spring insertion groove 130 formed around; The screw fastening portion 210 having a thread formed on the outer circumferential surface, and a handle portion 220 formed in the lower portion of the bolt fastening portion 210 to a diameter larger than the bolt fastening portion 210, the handle insertion hole 120 The bolt fastening portion 210 is inserted into the outer diameter of the bolt fastening portion 210 is the handle 200 is formed smaller than the inner diameter of the handle insertion hole 120 and; A spring 300 having a lower end fitted into a spring insertion groove of the support device 100; A bolt insertion hole 430 is formed at the center lower portion of the bolt fastening portion 210 of the handle 200 to be bolted to each other, and a thread 431 is formed at an inner circumferential surface of the bolt insertion hole 430, and a spring is formed around the lower portion thereof. A connection member 400 having an upper spring inserting groove 420 formed so that an upper portion of the 300 is inserted and having a support pillar insertion hole 410 formed at an upper center thereof; It is composed of a seat plate 520 and a support column 510 at the bottom of the seat plate 520 to allow the user to sit, and the support column 510 is inserted into the support column insertion hole 410 of the connection member 400. Chair spring (500); proposed a resilient adjustable chair provided with a spring.

However, in the case of Patent Document 2, since the outer circumferential surface of the connecting member 400 and the inner circumferential surface of the spring 300 are in contact with each other, interference occurs by the connecting member when the left and right flows due to the elasticity of the spring, as well as limitations in the left and right flow. , There is a problem that noise occurs by friction between the connecting member and the spring.

In addition, the connection member 400 and the handle 200 without flexibility are integrally coupled to each other so that the connection member 400 and the handle 200 move together in front, rear, left and right as the support pillar 510 moves. When the support pillar 510 moves in this structure, great friction occurs on the inclined surface of the handle portion 220 coupled to the lower end portion of the handle insertion hole 120 and the spring, which hinders the movement of the support pillar 510. Even if the support column 510 is difficult to move, friction noise is continuously generated, and the inclined surface of the handle part 220 continuously applies an impact while cutting the bottom of the handle insertion hole 120, thereby lowering the handle insertion hole 120. Starting from breakage and as the use time becomes longer, the entire handle insertion hole 120 is broken.

If the inclined surface of the handle portion 220 is removed in order to prevent damage to the handle insertion hole 120, the lower portion of the support device 100 which is in contact with the handle portion 220 whenever the support pillar 510 moves forward, backward, left, and right The lower part of the spring 300 when the support column 510 moves forward, backward, left, and right while completely hitting the part 220 and not only continuously generating noise, but also contacting the bolt connection part 210 and the support device 100 with each other. Is easily separated from the lower spring insertion groove 130, the handle insertion hole 120 may be broken or may cause a physical safety problem.

Furthermore, since the spring insertion hole 130 and the lower protrusion groove 131 must be formed separately around the handle insertion hole 120 of the tubular body 20, the support part 21 can not be used for a base of a mishap type commonly sold in the market. There is a problem that the manufacturing cost is increased because there is no common purpose because it can not be a product independently and always made a set with a specially made pipe 20 according to the support.

The present invention is to solve the problems of the prior art, the purpose of the compression of the spring by tightening the adjustment nut of the lower part of the chair to increase the load of the upper part of the spring increases the fluidity of the front and rear, left and right to loosen the adjustment nut Loose compression reduces the load on the upper part of the spring and increases the cushioning feeling instead of decreasing the flowability of the front, rear, left, and right sides. To provide.

The present invention for achieving the above object, the spring 10 is mounted to the bottom of the chair; An upper support member 20 having a spring fixing end 21 connected to an upper portion of the spring at a lower end thereof, and having a seat 24 installed thereon; A wire 30 penetrating the inner side of the spring; A stopper 40 fixed to the upper support member 20 while fixing the upper end of the wire; A lower support member (50) formed at a top thereof with a spring fixing end (51) connected to a lower portion of the spring, and having a lifting hole (52) drilled up and down at a center thereof and bound to a pedestal of a chair; A lifting bolt 60 penetrating the lifting hole in a state where the lower end of the wire is fixed and a screw thread is formed on an outer surface thereof; It is characterized by the coupling of the adjustment nut 70 is screwed with the lower portion of the elevating bolt protruding to the lower side of the lower support member to enable the elevating bolt to move up and down when rotating, the base is spring through the basic structure By providing the elasticity of the up and down and left and right directions to provide a cushion cushion, and by adjusting the height of the elevating bolt by rotating the adjustment nut can be adjusted the elasticity of the spring.

According to the present invention, when the spring is compressed by tightening the adjustment nut of the lower part of the chair, and the spring is compressed, the load of the upper part of the spring increases, so that the seated person shakes the seat a little, and the front, rear, left and right fluidity can be greatly increased. When the compression is loosened, the load on the upper part of the spring is reduced, so that the front and rear, right and left fluidity can be reduced, but the cushioning feeling can be increased. You can maximize your satisfaction.

Moreover, since the spring inner surface and the wire are sufficiently separated, the spring inner surface and the wire do not interfere with each other even when the spring flows forward, backward, left and right, so that the flow range of the spring is not limited or there is no fear of noise.

In addition, since it is applicable to various types of chairs and has a general purpose, there is an advantage that can contribute to popularization.

1 is a front view of a chair equipped with a tension device according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional view of a tension device that is a main part of FIG. 1.
3 is an exploded and assembled perspective view of the lower support of FIG. 2.
4 is a cross-sectional view illustrating a tension control state of a tension device that is a main part of FIG. 1.
5 is a front view of a chair equipped with a tension device according to a second embodiment of the present invention.
6 is a cross-sectional view of a tension device that is a main part of FIG. 5.
7 is a cross-sectional view of a tension device for a chair according to a third embodiment of the present invention.
8 is a cross-sectional view of a tension device for a chair according to a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings, which show preferred embodiments of the present invention. It should be understood, however, that there is no intention to limit the invention to the particular form disclosed, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. A detailed description thereof will be omitted.

1 is a front view of a chair equipped with a tension device according to a first embodiment of the present invention, Figure 2 is a cross-sectional view of the tension device that is the main part of Figure 1, Figure 3 is an exploded and assembled perspective view of the lower support of Figure 2 4 is a cross-sectional view illustrating a tension control state of a tension device that is a main part of FIG. 1.

As shown in FIG. 1, according to the present invention, a vertical post portion between a seat 24 of a chair and a five-branch branch pedestal 54 which is usually divided into five springs 10 to provide cushioning to the seat 24. Tension device comprising a.

At this time, between the spring 10 and the base 24, a gas spring 22 equipped with an adjustment lever 2 may be installed to adjust the height of the base 24, and thereby the lever in the state sitting on the base Pulling up (2) raises the base 24, and pulling up the lever 2 in a non-sitting state raises the base 24, which can obscure the subject matter of the present invention as this device is a general structure applied to the chair. Therefore, detailed description thereof will be omitted.

As shown in FIG. 2, the tension device includes a spring 10, an upper support member 20, a wire 30, a stopper 40, a lower support member 50, a lifting bolt 60, and an adjustment nut ( 70).

The spring 10 is a coiled spring that is installed in a vertical direction between the seat 24 and the pedestal 54 of the chair to allow the seat 24 to flow up and down and left and right to have cushioning properties.

The upper support member 20 is installed on the spring 10, a spring fixing end 21 is formed at the lower end connected to the upper portion of the spring 10, and the base 24 is installed on the upper side. A general gas spring 22 may be mounted between the support member 20 and the base 24.

To this end, the upper portion of the upper support member 20 generally takes the form of a circular tube with a rim protruding upward so that the cylindrical gas spring 22 is inserted therein, and a spring fixing end 21 having a columnar shape is downward at the bottom center. By protruding, the side and end of the spring fixing end 21 are assembled such that the upper inner diameter portion and the upper end of the spring 10 come into contact with each other. That is, the spring fixing end 21 in the form of a column is inserted into the upper end of the spring 10.

The wire 30 is installed to penetrate the inner side of the spring 10 in the vertical direction, and is provided to prevent the spring 10 from being separated and to adjust the elasticity of the spring 10.

The stopper 40 is swaged, for example, the upper part of the wire 30 is inserted into the lower hole of the stopper 40, and then pressed by a press device to fix the wire 30, and in the state of fixing the wire 30. It is fixed to the center of the upper support member 20.

The lower support member 50 is installed below the spring 10, and a spring fixing end 51 is formed at an upper end thereof to be connected to a lower portion of the spring 10, and the lifting hole 52 is disposed up and down at the center. It is perforated.

The lifting bolt 60 is swaged and is installed through the lifting hole 52 in a state where the lower end of the wire 30 is fixed, and a thread is formed on an outer surface thereof. As a method of fixing the lower portion of the wire 30, for example, a method of pressing the lower portion of the wire 30 into the wire fixing hole 61 formed in the upper portion as shown in FIG. 3 may be used.

The adjustment nut 70 is screwed with the lower portion of the elevating bolt 60 protruding to the lower support member 50, the rotation bolt 60 is screwed with it when the adjustment nut 70 is rotated It will move up and down.

According to an embodiment of the present invention, the lower support member 50 may be inserted and fixed in the hole formed at the center of the branch support 54. To this end, as shown in FIG. 3, the lower support member 50 has a cylindrical shape so as to be inserted into the center of the branch pedestal 54, and a spring fixing end 51 having a columnar shape protrudes upward at the top center thereof. The end 51 is inwardly inserted into the lower end of the spring 10. In addition, the elevating hole 52 has a circular cross section, and one side thereof has a flat surface 53, and a thread is not formed on the inner surface thereof.

The elevating bolt 60 penetrating the elevating hole 52 has a screw thread formed on an outer surface thereof, and one side of the elevating bolt 60 is formed with a flat end surface 62 in a shape corresponding to the plane 53.

In such a configuration, since the flat end surface 62 of the elevating bolt 60 and the plane 53 in the elevating hole 52 correspond to each other, the elevating bolt 60 is not rotatable in the elevating hole 52. In this state, as shown in FIG. 4, when the adjusting nut 70 is rotated in one direction, the lifting nut 60 screwed in the shape of the adjusting nut 70 and the female is lowered without rotating. .

When the lifting bolt 60 is lowered, the upper support member 20 connected via the wire 30 and the stopper 40 is also lowered at the same time, so that the cushioning property of the spring 10 is compressed in the longitudinal direction and flows up and down is lowered. Even if a small force acts, the front, rear, left and right fluidity can be increased.

On the contrary, by releasing the pulled wire 30 by rotating the adjusting nut 70 in the unwinding direction, the load applied to the spring 10 is reduced, and thus the cushioning property in the vertical direction is increased instead of decreasing the front, rear, left, and right fluidity.

Therefore, the user can appropriately adjust the fluidity and the upper and lower cushioning of the front and rear, left and right in consideration of their own taste or weight, and also because the wire 30 is a thin line shape is installed at a sufficient distance from the inner surface of the spring 10 Therefore, interference with the wire 30 may be minimized when the spring 10 flows.

5 is a front view of a chair provided with a tension device according to a second embodiment of the present invention, Figure 6 is a cross-sectional view of the tension device that is the main part of FIG.

As shown in FIG. 5, the tensing device of the present invention may be installed at a lower portion of the general seat 24 where gas springs are not installed, or may be installed at an upper portion of the pedestal 55 having an unbranched flat plate shape. To this end, the shape of the upper support member 20 and the lower support member 50 should also vary.

For example, as shown in Figure 6, the upper support member 20 is in the shape of a disk, the base 24 is installed on the upper end surface, the spring fixed end 21 of the columnar shape protrudes downward in the lower center. And the inside of the upper end of the spring (10). In addition, a plurality of holes are drilled so that the seat fixing bolt 25 can pass around the spring fixing end 21, and the seat 24 is mounted on the upper support member 20 using the bolt 25. Can be fixed

Similarly, the lower support member 50 also has a disc shape, and a pedestal 55 is installed on the bottom surface thereof, and a spring fixing end 51 having a columnar shape protrudes upward from the top center thereof to the bottom inner side of the spring 10. Incorporated. In addition, a plurality of holes are formed in the periphery of the spring fixing end 51 through which the fixing bolt 25 penetrates, and the pedestal 55 is disposed below the lower support member 50 using the bolt 25. Can be fixed.

7 is a cross-sectional view of a tension device for a chair according to a third embodiment of the present invention, Figure 8 is a cross-sectional view of a tension device for a chair according to a fourth embodiment of the present invention.

The tension device of the present invention can be applied to various types of chairs. That is, as shown in FIG. 7, the upper support member 20 is installed below the general seat 24 on which the gas spring is not installed, and the lower support member 50 is inserted into the center hole of the pedestal 54 branched into five legs. It may be in a fixed form. In addition, unlike the embodiment of Figure 7, the upper support member 20, as shown in Figure 8 may be a cylindrical tubular shape described above so that the gas spring 22 is installed on the upper, the lower support member 50 is a plate-shaped pedestal ( 55).

As such, according to the present invention, it is to be understood that the upper support member 20 and the lower support member 50 may be appropriately changed in structure depending on the shape of the chair.

Although the present invention has been described in connection with the preferred embodiments described above, it will be appreciated by those skilled in the art that various other modifications and variations can be made without departing from the spirit and scope of the invention, All such changes and modifications are intended to be within the scope of the appended claims.

10: spring 20: upper support member
21: spring fixed end 22: gas spring
23: lever 24: base
30: wire 40: stopper
50: lower support member 51: spring fixing end
52: elevation hole 53: plane
54: branch feet 55: pedestal
60: elevating bolt 61: wire fixing hole
62: flat section 70: adjusting nut

Claims (5)

A spring 10 mounted to the bottom of the chair;
An upper support member 20 having a spring fixing end 21 connected to an upper portion of the spring at a lower end thereof, and having a seat 24 installed thereon;
A wire 30 penetrating the inner side of the spring but spaced apart from the inner surface of the spring so that interference with the inner side of the spring does not occur when the spring flows back, forth, left or right;
A stopper 40 fixed to the upper support member 20 while fixing the upper end of the wire;
A lower support member (50) formed at a top thereof with a spring fixing end (51) connected to a lower portion of the spring, and having a lifting hole (52) drilled up and down at a center thereof and bound to a pedestal of a chair;
A lifting bolt 60 penetrating the lifting hole in a state where the lower end of the wire is fixed and a screw thread is formed on an outer surface thereof;
Adjusting nut 70 is screwed with the lower portion of the elevating bolt protruding to the lower support member to enable the elevating bolt to move up and down when rotated;
Chair tension device characterized in that the combination of.
The method of claim 1,
The upper portion of the upper support member 20 is a circular tube shape with a rim protruding upwards so that the gas spring 22 is inserted therein, and a spring fixing end 21 having a columnar shape protrudes downward from the lower center to the upper inner side of the spring. Incorporated into, the chair tension device, characterized in that the seat (24) is installed on the top of the gas spring.
The method of claim 1,
The upper support member 20 has a disk shape, the spring fixing end 21 of the column shape at the bottom center protrudes downward to be inserted into the upper end of the spring, the seat fixing bolt 25 around the spring fixing end Chair tension device, characterized in that a plurality of holes penetrated.
The method of claim 1,
The lower support member 50 is cylindrical so as to be inserted into the center of the branch support 54, and a spring fixing end 51 having a columnar shape protrudes upward at the top center thereof to be inserted into the lower end of the spring, and the lifting hole 52 is provided. Is one side of the plane 53,
One side of the elevating bolt 60 in the elevating hole is formed in a flat cross-section corresponding to the plane so that the elevating bolt 60 can be raised and lowered without rotating when the adjustment nut 70 rotates. Chair tension device.
The method of claim 1,
The lower support member 50 has a disc shape, and a spring fixing end 51 having a columnar shape protrudes upward at an upper center thereof to be inserted into the lower end of the spring, and a pedestal fixing bolt 25 is disposed around the spring fixing end. Chair tension device, characterized in that a plurality of holes penetrated.

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