KR200243641Y1 - Hightness control device for chair - Google Patents

Abstract

The present invention relates to a chair height and height adjustment device, which is formed by extending the leg portion 111 on both sides of the upper chair frame 110, the lower leg support portion 122 vertically placed in the lower leg rest 120 It is inserted into the assembly so as to move up and down, the annular groove (1) formed in a predetermined range up and down along the periphery of the leg portion 111 of the upper chair frame (110); Insertion groove 21 is formed in the lower opening therein, the first through-hole 22 is formed in a smaller diameter than the insertion groove 21 in the upper center portion of the insertion groove 21 is latched to the outside thereof ( 23 is formed, and the support (2) formed on the upper and lower sides of the outer surface and the threaded portion 24 and the fixing jaw (25), respectively; The second through hole 31 having a slot 34 on one side is formed at the center of the support 2 while the annular protrusion 32A is formed on the inner side of the second through hole 31. A tightening ring 3 formed on the outer surface and having a contact slope surface 33 having an upper and lower light type; The receiving groove 41 and the relative contact inclined surface 44 is formed in the lower portion therein, the third through-hole 42 is formed in a smaller diameter than the receiving groove 41 in the upper center of the receiving groove 41 Since the pressing jaw 43 is formed on the outside thereof, the lower inner surface of the receiving groove 41 is formed by the joint 4 having the mating screw portion 45 formed therein, and thus the height and the height of the chair are increased by the tightening force due to the surface contact. In addition to being adjustable, the tightening force is also gradually increased in proportion to the weight of the chair, which not only improves the height and height of the chair, but also makes it possible to adjust the height without user's simple tools. The simplicity of the effect can be.

Description

Height control device for chair

The present invention relates to a chair height and height adjustment device, and more specifically, to adjust the height and height of the chair by the tightening force by surface contact, the tightening force is also increased in proportion to the weight of the chair. The present invention relates to a chair height and height adjustment device that enables stability of chair height and height adjustment and enables chair height and height adjustment without a separate tool.

In general, a chair (including a desk) is to allow the user to arbitrarily adjust the height. Figures 4 and 5 show an example of a conventional chair height and height adjustment device of the present applicant. .

Conventional chair height and height adjustment device is provided with leg portions extending on both sides of the lower side of the upper chair frame 110, as shown in Figure 4, the leg portion 111 is the lower leg rest ( It is inserted into the leg support portion 120A vertically inserted into 120 and assembled to be movable up and down, and fixed and released by the fastening means to adjust the height and height of the chair.

The fastening means is that the height adjustment bolt 130 as shown in Figure 5 is used, the circular protrusion 131 is formed at a predetermined diameter at the front end of the height adjustment bolt 130, the wrench groove in the rear end 132 is formed. In addition, the wall surface of the leg portion 111 of the upper chair frame 110 is formed by a plurality of height adjustment holes 112 in a vertical column is fixed by the insertion of the circular projection 131 by the entry of the height adjustment bolt 130, The fixing is released by the retraction, the entry and retraction of the height adjustment bolt 130 is made by the use of a wrench tool.

Thus, the conventional chair height and height adjustment device allows the height and height of the chair to be adjusted by the entry and retraction of the height adjustment bolts, and is in line contact with the circular protrusions protruding to a predetermined diameter at the tip of the height adjustment bolts. It is configured so that the adjusted height can be adhered to only by the supporting force, so that the load due to the weight on the chair is concentrated on the circular protrusion, which causes breakage due to premature fatigue of the circular protrusion. There was a problem that caused instability.

In addition, when entering and retracting the height adjustment bolt, a separate wrench tool must be used, resulting in trouble and inconvenience in height and height adjustment of the chair.

The present invention has been devised to solve the conventional problems as described above, the purpose of which is to adjust the height and height of the chair by the tightening force by the surface contact while the tightening force is also proportional to the weight of the chair It is designed to be relatively large, so that the height and height of the chair can be stabilized and the height and height of the chair can be adjusted without any tools.

In order to achieve the object of the present invention, the legs are extended to both sides of the lower chair frame is inserted into the leg support portion vertically installed in the lower leg rest is assembled so as to move up and down, the circumference of the leg of the upper chair frame An annular groove formed in a predetermined range up and down along the; An insertion groove is formed in the lower portion of the inside, and the first through hole is formed to a diameter smaller than the insertion groove in the upper center portion of the insertion groove, so that a locking jaw is formed on the outside thereof. A jaw formed support; The second through hole having a slot on one side is formed in the center of the support while being located on the upper side of the support, and an annular protrusion is formed on the inner side of the second through hole, and a fastening ring having an upper and lower light contact inclined surface formed on the outer side thereof. and; A receiving groove and a relative contact inclined surface is formed in the lower portion therein, a third through hole is formed in a diameter smaller than the receiving groove in the upper central portion of the receiving groove to form a crimping jaw to the outside thereof, the lower inner surface of the receiving groove The chair is provided with a height and height adjustment device of the chair, characterized in that consisting of a joint formed with a mating thread.

1 is a perspective view showing a chair height adjustment device according to the present invention.

Figure 2 is an exploded perspective view of the present invention.

3 is a cross-sectional view of the coupling state of the present invention.

Figure 4 is a perspective view showing a conventional chair height.

5 is an enlarged cross-sectional view of the main portion of FIG.

* Explanation of symbols for the main parts of the drawings

1: annular groove

2: support

21: Insertion groove 22: Through hole

23: engaging jaw 24: screw

25: fixed jaw

3: tightening ring

31: second through hole 32A: annular protrusion

33: contact slope 34: slot

4: Joint

41: accommodation groove 42: third through hole

43: Crimping jaw 44: Relative contact slope

45: relative thread

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the present invention according to the embodiment.

1 is a perspective view showing a chair height. Height adjusting device according to the present invention, the chair height. Height adjusting device is formed with leg portions 111 on both sides of the upper chair frame 110, as usual. The leg part 111 is inserted into the leg support part 122 vertically inserted into the lower leg support 120 to be assembled to be moved up and down, and fixed and released by the fixing means to raise and lower the height of the chair. It consists of adjusting.

In the chair height and height adjustment device, the present invention is a support (2) is formed on the upper end of the leg support portion 122 of the lower leg support 120 as a fixing means, the upper chair frame of the upper side of the support (2) The leg portion 111 of the 110 is formed with a joint (4) accommodated therein the tightening ring (not shown) is configured to be fixed and released by the tightening force by the up and down movement of the joint (4) do.

Figure 2 is an exploded perspective view showing the configuration of the present invention, as shown in the present invention is a semicircular cross-section along the circumference of the leg 111, the annular groove (1) is vertically formed in a predetermined range up and down, the outside of the On the support 2, the tightening ring 3 and the joint 4 are each provided sequentially.

The support 2 is formed with an insertion groove 21 opened downward to allow the end side of the leg support portion 122 to be inserted therein, and the leg portion 111 at the upper center portion of the insertion groove 21. The first through hole 22 is inserted into the upper and lower penetrating, wherein the difference between the diameter of the insertion groove 21 and the first through hole 22, the outer side of the first through hole 22 leg support portion ( The engaging jaw 23 is formed on the upper end of the 122. In addition, the upper portion of the outer surface of the support 2, the thread portion 24 is formed, the lower side of the fixing jaw 25 is formed to protrude outward.

The fastening ring 3 has a second through-hole 31 through which the leg portion 111 is inserted in the center portion is formed to penetrate up and down. In this case, a slot 34 is formed at one side of the second through-hole 31. It is configured to have its own elasticity. In addition, a plurality of annular projections 32A having a semi-circular cross-sectional shape corresponding to the annular groove 1 of the leg 111 are formed in a vertical row on the inner side surface of the second through hole 31, and the outer side of the second through hole 31 It is formed of the contact inclined surface 33.

The joint 4 has a receiving groove 41 in which the tightening ring 3 is accommodated therein so as to open to the lower side, and the leg 111 is inserted into the upper center portion of the receiving groove 41. The through hole 42 is formed to penetrate up and down. In addition, the pressing jaw 43 is formed on the outer side of the third through hole 42 by the diameter difference between the receiving groove 41 and the third through hole 42, and the fastening ring 3 is formed on the inner side of the receiving groove 41. Relative contact inclined surface 44 corresponding to the contact inclined surface 33 of the () is formed, the lower inner surface of the receiving groove 41, the relative screw portion 45 is fastened to the threaded portion 24 of the support (2) do.

3 is a cross-sectional view showing a coupling state of the present invention.

As shown therein, the support 2 of the present invention is inserted into the upper end of the leg support 122 by the insertion groove 21 therein, and the inserted support 2 is again attached to the upper side locking jaw 23. By sticking to the position without falling to the lower side of the leg support (122). In addition, the leg part 111 is inserted into the leg support part 122 through the first through hole 22 of the support 2, and the fastening ring 3 and the joint 4 are disposed outside the leg part 111. Is provided, the tightening ring (3) is fixed by the engagement of the annular projection (32A) with respect to the annular groove (1) of the leg portion 111, the joint 4 is a relative screw portion 45 formed in the lower inner Is fastened to the threaded portion 24 of the support 2 to form a series of assembly and coupling.

The following describes the height adjustment process of the present invention assembled and coupled as described above.

First, the joint 4 is rotated in the release direction to loosen the mating screw portion 45 of the joint 4 with respect to the screw portion 24 of the support 2 so that the upper and lower parts are free, and then the tightening ring 3 ) Is opened to both sides around the slot 34 so as to be free up and down and moved to a desired position.

Then, by tightening the tightening ring 3 again by hand, the annular projection 32A of the tightening ring 3 is inserted into the annular groove 1 at the corresponding position and engaged therewith, and then the joint 4 of the upper and lower free state is engaged. When lowered to the lower side, while the relative contact inclined surface 44 of the joint 4 along the contact inclined surface 33 of the tightening ring 3, the tightening force of the joint 4 to the tightening ring 3 is acted on The position is held, and a series of height adjustment work is completed by fastening the counterpart screw part 45 of the joint 4 to the screw part 24 of the support stand 2 again.

As described above, the present invention allows the height and height of the chair to be adjusted by the surface contact, while the tightening force is also gradually increased in proportion to the weight of the chair to increase the stability of the chair height and height adjustment. Not only can it be planned, but the height can be adjusted by the user's simple operation without any tools, so the height and height of the chair can be adjusted.

Claims (1)

In the lower side of the upper side of the chair frame 110, the leg 111 is formed to extend and inserted into the leg support portion 122 vertically placed on the lower leg support 120 is assembled so as to move up and down, An annular groove 1 formed along a circumference of the leg 111 of the upper chair frame 110 in a predetermined range; Insertion groove 21 is formed in the lower opening therein, the first through-hole 22 is formed in a smaller diameter than the insertion groove 21 in the upper center portion of the insertion groove 21 is latched to the outside thereof ( 23 is formed, and the support (2) formed on the upper and lower sides of the outer surface and the threaded portion 24 and the fixing jaw (25), respectively; The second through hole 31 having a slot 34 on one side is formed at the center of the support 2 while the annular protrusion 32A is formed on the inner side of the second through hole 31. A tightening ring 3 formed on the outer surface and having a contact slope surface 33 having an upper and lower light type; The receiving groove 41 and the relative contact inclined surface 44 is formed in the lower portion therein, the third through-hole 42 is formed in a smaller diameter than the receiving groove 41 in the upper center of the receiving groove 41 Pressing jaw 43 is formed to the outside of the height, the height adjustment device of the chair, characterized in that the lower inner surface of the receiving groove 41 consists of a joint (4) formed with a relative screw portion (45).