KR20170050066A

KR20170050066A - Height-adjustable chair

Info

Publication number: KR20170050066A
Application number: KR1020150151114A
Authority: KR
Inventors: 민우기; 허송; 김민재
Original assignee: 주식회사 삼홍사
Priority date: 2015-10-29
Filing date: 2015-10-29
Publication date: 2017-05-11
Also published as: WO2017074127A1

Abstract

According to one embodiment of the present invention, disclosed is a height adjustable chair, comprising: a seat plate formed to allow a user to seat thereon; a base frame formed to be spaced from the seat plate at a predetermined distance; one or more frames connecting the base frame and the seat plate; and one or more height adjustable members formed to connect the base frame or the frame to the seat plate and formed to vary the length thereof to control the distance between the seat plate and the base frame.

Description

{Height-adjustable chair}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a chair capable of height adjustment, and more particularly, to a chair having a plurality of gas springs to adjust height.

Generally, the chair consists of a seat, a backrest and a leg supporting the seat. When the user sits on the chair, the user's buttocks contact the seat, and the back of the user touches the backrest.

These chairs are divided into several types according to their shape, structure, materials and processing techniques. Depending on the form, there are a chair without a backrest, a small chair, an armrest chair, an armchair, a sofa, a rocking chair, etc. Depending on the purpose, there are office, study, Hairdressing, beauty, medical, and theater.

The structure of the chair is fixed, rotary, folding and combination type, and the materials used are wooden chair, metal chair and plastic chair, and they are made by mixing them.

In order to adjust the height of a seat in a conventional chair, first remove the nut, remove the bolt from the height adjustment ball, lift up the upper frame or adjust the height of the seat and adjust the bolt and nut A method of fixing the position of the upper frame is used.

In order to adjust the height of the seat by using the conventional height adjusting device as described above, it is very inconvenient to unscrew and fasten the bolt and nut. To adjust the height of the seat, hold the seat and upper frame with the bolt and nut loosened, adjust the height, and insert the bolt into the height adjustment ball. This operation is difficult to be done alone, and the upper frame may be dropped during the height adjustment, thereby causing a safety accident.

In addition, various height adjusters (adjusters) have been proposed, but the structure is complicated or the convenience of the user is insufficient.

The above-described background technology is technical information that the inventor holds for the derivation of the present invention or acquired in the process of deriving the present invention, and can not necessarily be a known technology disclosed to the general public prior to the filing of the present invention.

Embodiments of the present invention provide a chair that is adjustable in height.

One embodiment of the present invention provides a seat assembly comprising: a seat plate configured to allow a user to sit; A base frame spaced apart from the seat by a predetermined distance; At least one frame connecting the base frame and the seat; And at least one height adjusting member formed to connect the base frame or the frame to the seat so as to have a variable length and to adjust a distance between the seat and the base frame, . In this embodiment, the base frame is formed with a long groove-shaped guide rail, and one end of the frame can be formed to be slidable along the guide rail.

In this embodiment, a long groove type guide rail may be formed on the seat plate, and one end of the frame may be formed to be slidable along the guide rail.

In this embodiment, one end of the height adjusting member may be coupled to the frame, and the other end of the height adjusting member may be coupled to the seat.

In the present embodiment, one end of the height adjusting member may be coupled to the base frame, and the other end of the height adjusting member may be coupled to the seat.

In the present embodiment, the height adjusting member may be a gas spring.

In the present embodiment, the height adjusting member includes: a lever; A coil spring urged by the lever; And a friction portion connected to the coil spring and adapted to receive a predetermined elastic force from the coil spring and to be contactable with the fixing portion formed on the seat plate or the frame.

In this embodiment, the frame may include a first frame and a second frame formed to intersect with each other, and one end of the height adjusting member may be coupled to any one of the first frame and the second frame And the other end of the height adjusting member may be coupled to the seat or the other frame.

In the present embodiment, the one or more frames may be formed such that both ends are relatively thin compared to the central portion.

Other aspects, features, and advantages will become apparent from the following drawings, claims, and detailed description of the invention.

The chair capable of adjusting the height according to the embodiments of the present invention can obtain the effect of realizing a chair capable of easily adjusting the height without complicated construction by applying the gas spring to the chair, The process can be simplified and the user convenience can be improved.

1 and 2 are perspective views illustrating a structure of a chair capable of adjusting height according to a first embodiment of the present invention.
Fig. 3 is a sectional view showing a gas spring of a chair capable of adjusting the height of Fig. 1;
4 is a perspective view illustrating a structure of a chair capable of adjusting height according to a second embodiment of the present invention.
FIG. 5A is a side view of the chair capable of adjusting the height of FIG. 4, and shows a state where the chair is raised. FIG.
FIG. 5B is a side view of the chair capable of adjusting the height of FIG. 4, and shows a state where the chair is lowered. FIG.
6A and 6B are perspective views illustrating a structure of a chair capable of adjusting height according to a third embodiment of the present invention.
FIG. 7 is a side view of the chair capable of adjusting the height of the chair in FIGS. 6A and 6B.
FIG. 8 is a side view of the chair capable of adjusting the height of FIG. 6A and FIG. 6B, showing a state in which the chair is lowered.
9 and 10 are side views showing a structure of a chair capable of height adjustment according to a fourth embodiment of the present invention.
11 and 12 are front views of the button portion of Fig.
13 is a bottom view of the button portion of Fig.
14 is a perspective view illustrating a structure of a chair capable of adjusting the height according to the fifth embodiment of the present invention.
Figs. 15 and 16 are side views of the height adjustable chair of Fig. 14. Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning. Also, the singular expressions include plural expressions unless the context clearly dictates otherwise. Also, the terms include, including, etc. mean that there is a feature, or element, recited in the specification and does not preclude the possibility that one or more other features or components may be added. Also, in the drawings, for convenience of explanation, the components may be exaggerated or reduced in size. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

1 and 2 are perspective views illustrating a structure of a chair capable of adjusting height according to a first embodiment of the present invention. 3 is a cross-sectional view of a gas spring of a chair capable of adjusting the height of the chair shown in Fig.

1, 2 and 3, a height adjustable chair 100 according to a first embodiment of the present invention includes a base frame 110, a first frame 121, a second frame 122, A backrest 140, a backrest 150, 1 and 3 illustrate a gas spring 130 as an example of a height adjusting member, and various types of oil / pneumatic cylinders may be applicable as a height adjusting member.

In detail, the base frame 110 forms the base of the chair 100, which is adjustable in height. The base frame 110 is shown in the form of a pair of square frames facing each other and the two rectangular frames being connected by a bar and / However, the spirit of the present invention is not limited thereto, and various shapes of the base frame 110 capable of forming the base of the chair 100, which is adjustable in height, are applicable to the present invention.

The first guide rail 111 may be formed on each base frame 110. The first guide rail 111 is formed in a long groove shape formed in the base frame 110 and serves to guide the first frame 121 so that the first frame 121 to be described later can slide in one direction can do.

The upper portion of the base frame 110 is formed to protrude upward by a certain degree relative to the seat plate 140 to form an armrest 115. As a result, user convenience can be improved.

Meanwhile, a protective member 113 formed of a transparent material such as glass is further formed inside the rectangular frame-shaped base frame 110 to prevent the user's hand from being caught between the frames. By applying the protective member 113 as described above, it can serve as a stabilizing device for preventing hand-stabbing particularly when the elderly use a chair.

The seat plate 140 may be formed in a flat plate shape in which the user can sit. In addition, a second guide rail 141 may be formed on the lower portion of the seat plate 140. The second guide rail 141 is formed in a long groove formed in the seat plate 140 and serves to guide the second frame 122 so that the second frame 122 to be described later can slide in one direction .

The backrest 150 is connected to the seat 140 and may be formed in a flat plate shape.

The first frame 121 and the second frame 122 may be formed between the base frame 110 and the seat 140 so as to connect the seat frame 140 with the base frame 110.

In detail, one end of the first frame 121 may be formed to be rotatable by being pin-coupled to the lower end of the seat panel 140. The other end of the first frame 121 may be coupled to the first guide rail 111 of the base frame 110 to be movable along the first guide rail 111.

On the other hand, one end of the second frame 122 may be formed to be rotatable by being pin-coupled to the lower end of the base frame 110. The other end of the second frame 122 may be coupled to the second guide rail 141 of the seat 140 to be movable along the second guide rail 141.

The first frame 121 and the second frame 122 are formed so as to intersect with each other and the substantially middle portion of the first frame 121 and the second frame 122 is pin- And the pin 123, as shown in Fig.

The gas spring 130 is formed so as to be adjustable in length by adjusting the internal gas pressure. One end of the gas spring 130 may be coupled to the first frame 121 and the other end of the gas spring 130 may be fixedly coupled to the seat panel 140 or the second frame 122. The height of the chair, that is, the height of the seat plate 140, can be adjusted by the change of the length of the gas spring 130.

The adjustment button 160 may be connected to the gas spring 130 by a cable (not shown), and the gas spring 130 may be opened and closed and its length may be adjusted according to the operation of the adjustment button 160.

The gas spring 130 will now be described in more detail with reference to FIG.

The gas spring 130 includes a cylinder 131, a piston 132 reciprocating in a relatively upward and downward direction within the cylinder 131, and a piston rod 133 on which the piston 132 is mounted. The gas spring 130 includes a gas sealing portion 136 for sealing the upper end portion of the cylinder 131. The inside of the cylinder 131 is maintained at a constant pressure by the gas sealing portion 136.

Gas chambers 134 and 135 having a predetermined length are formed in the cylinder 131 sealed by the gas sealing portion 136 and a gas such as nitrogen is injected into the gas chambers 134 and 135. The gas chambers 134 and 135 are divided by the piston 132 into an upper chamber 134 and a lower chamber 135. The volume of the upper chamber 134 and the lower chamber 135 is changed by the upward and downward movement of the piston 132. Here, the upper chamber 134 and the lower chamber 135 are maintained at a pressure higher than the atmospheric pressure.

The gas spring 130 also includes an open pin 137 inserted through the center of the piston 132. The open pin 137 is connected to an operation lever (not shown) so that the open pin 137 is lowered when the operation lever is pressed or raised. On the other hand, a valve pin 139 for opening and closing the gas is formed at the center of the piston 132, and an orifice 138 for introducing and exiting the gas is formed at one side of the piston 132.

The operation of such a gas spring is as follows.

When the user presses the adjustment button 160 connected to the open pin 137 while the user is sitting, the open pin 137 is pressed. When the open pin 137 is pressed downward, the valve pin 139 in contact with the open pin 137 is lowered. When the valve pin 139 is lowered, the gas stored in the lower chamber 135 is moved to the orifice 138 along the side surface of the valve pin 139. The nitrogen gas transferred to the orifice 138 is then transferred to the upper chamber 134. Then, the volume of the upper chamber 134 becomes larger than the volume of the lower chamber 135, so that the piston 132 is relatively lowered. When the user removes the force applied to the control button 160, the movement of the gas no longer proceeds. Thus, the chair is fixed at the height desired by the user.

Hereinafter, the overall operation of the chair 100 capable of adjusting the height according to the first embodiment of the present invention will be described.

When the user presses the adjustment button 160 connected to the open pin 137 while the user is sitting on the chair as shown in FIG. 1, the open pin 137 is pressed and the piston 132 is relatively lowered, that is, So that the overall length of the gas spring 130 is reduced. As the entire length of the gas spring 130 is reduced, the gas spring 130 pulls the seat 140 connected thereto, thereby lowering the seat 140. At this time, Each of the second frames 122 is rotated so that one end thereof is rotated and the other end thereof connected to the guide rail is slid.

Conversely, if the user presses the adjustment button 160 connected to the open pin 137 without the user sitting on the chair as shown in FIG. 2, the open pin 137 is pressed and consequently the piston 132 is relatively raised The entire length of the gas spring 130 is increased. The gas spring 130 is then pushed up to the seat 140 and the seat 140 is then lifted so that the first frame 121 Each of the second frames 122 is rotated so that one end thereof is rotated and the other end thereof connected to the guide rail is slid.

By applying the gas spring 130 to the chair as described above, it is possible to obtain an effect of realizing a chair capable of easily adjusting the height without complicated construction, thereby reducing the manufacturing cost, simplifying the manufacturing process and improving user convenience Effect can be obtained.

FIG. 4 is a perspective view showing a structure of a chair capable of adjusting the height according to the second embodiment of the present invention, and FIGS. 5A and 5B are side views of the chair capable of adjusting the height.

Referring to FIGS. 4, 5A and 5B, the height adjustable chair 200 according to the second embodiment of the present invention includes a base frame 210, a first frame 221, a second frame 222, A gas spring 230, a seat plate 240, a backrest portion 250, and an adjustment button 260.

In detail, the base frame 210 forms the base of the chair 200, which is adjustable in height. The base frame 210 may include a pair of first guide rails 211 and a pair of leg supports 217 formed to face each other.

The first guide rail 211 is formed in a long groove formed in a long bar and serves to guide the first frame 221 so that the first frame 221 to be described later can slide in one direction can do.

The seat plate 240 may be formed in a flat plate shape in which the user can sit. A second guide rail 241 may be formed on the lower portion of the seat panel 240. The second guide rail 241 is formed in the shape of a long groove formed in the seat panel 240 and serves to guide the second frame 222 so that the second frame 222 to be described later can slide in one direction .

The backrest part 250 is connected to the seat 240 and may be formed in a flat plate shape.

The first frame 221 and the second frame 222 may be formed between the base frame 210 and the seat panel 240 to connect the base frame 210 and the seat panel 240.

In detail, one end of the first frame 221 may be formed to be rotatable by being pin-coupled to the lower end of the seat panel 240. The other end of the first frame 221 may be coupled to the first guide rail 211 of the base frame 210 to be movable along the first guide rail 211.

On the other hand, one end of the second frame 222 may be formed to be rotatable by being pin-coupled to the lower end of the base frame 210. The other end of the second frame 222 may be coupled to the second guide rail 241 of the seat panel 240 to be movable along the second guide rail 241.

The first frame 221 and the second frame 222 are formed so as to intersect with each other and the substantially middle portion of the first frame 221 and the second frame 222 is pin- And is rotatable about the pin 223 as a center.

The gas spring 230 is formed so as to be adjustable in length by adjusting the internal gas pressure. One end of the gas spring 230 is coupled to the first frame 221 and the other end of the gas spring 230 is fixedly coupled to the seat 240 or the second frame 222. By adjusting the length of the gas spring 230, the height of the chair, that is, the height of the seat 240 can be adjusted.

Here, the first frame 221 and the second frame 222 are formed such that the engagement portion with the pin 223 is formed relatively thick, and is formed so as to be inclined or bent to a certain extent while being extended to both ends. As a result, It can be formed to be relatively thin compared to the portion. With such a configuration, even when the height of the chair is minimized, a gap is formed between the first frame 221 and the second frame 222 to a predetermined distance, and the gap between the first frame 221 and the second frame 222 It is possible to obtain an effect of preventing the user's hand from being caught by the user.

The adjustment button 260 may be connected to the gas spring 230 by a cable (not shown), and the gas spring 230 may be opened and closed and its length may be adjusted according to the operation of the adjustment button 260.

By applying the gas spring 230 to the chair as described above, it is possible to obtain a chair capable of easily adjusting the height without complicated configuration, thereby reducing the manufacturing cost, simplifying the manufacturing process, and improving user convenience Effect can be obtained.

FIGS. 6A and 6B are perspective views illustrating a structure of a chair capable of adjusting the height according to the third embodiment of the present invention, and FIGS. 7 and 8 are side views of the chair capable of adjusting the height of FIGS. 6A and 6B.

6A and 6B, 7 and 8, a height adjustable chair 300 according to a third embodiment of the present invention includes a base frame 310, a first frame 321, a second frame 321, 322, a gas spring 330, a seat plate 340, and an adjustment button (not shown). In detail, the base frame 310 forms a base portion of the height adjustable chair 300. The base frame 310 may include a pair of leg supports 317 formed to face each other.

The seat plate 340 may be formed in a flat plate shape in which the user can sit. A guide rail 341 may be formed under the seat plate 340. The guide rail 341 is formed in a long groove formed in the seat plate 340 and can guide the first frame 321 so that the first frame 321 to be described later can slide in one direction .

The first frame 321 and the second frame 322 may be formed between the base frame 310 and the seat panel 340 to connect the base frame 310 and the seat panel 340.

In detail, one end of the first frame 321 may be formed to be rotatable by being pin-coupled to the lower end of the base frame 310. The other end of the first frame 321 may be coupled to the guide rail 341 of the seat panel 340 to be movable along the guide rail 341.

On the other hand, one end of the second frame 322 may be formed to be rotatable by being coupled to the base frame 310 by pin. The other end of the second frame 322 may be coupled to the seat plate 340 to be rotatable.

The first frame 321 and the second frame 322 are formed so as to intersect with each other and the substantially middle portion of the first frame 321 and the second frame 322 is pin- And the pin 323, as shown in Fig.

The gas spring 330 is formed so as to be adjustable in length by adjusting the internal gas pressure. One end of the gas spring 330 may be coupled to the base frame 310 and the other end of the gas spring 330 may be coupled to the middle portion of the second frame 322. The height of the chair, that is, the height of the seat plate 340 can be adjusted by the change of the length of the gas spring 330.

Meanwhile, the adjustment button (not shown) may be connected to the gas spring 330 by a cable (not shown), and the gas spring 330 may be opened and closed and its length may be adjusted according to the operation of the adjustment button (not shown).

The height adjustable chair 300 according to the third embodiment of the present invention is configured such that even when the piston rod is completely drawn into the cylinder and the gas spring 330 reaches the minimum length, the first frame 321 and the second frame 322 Can be prevented from touching the base frame 310, thereby preventing the user's hand from being caught.

By applying the gas spring 330 to the chair as described above, it is possible to obtain an effect of implementing a chair capable of easily adjusting the height without complicated construction, thereby reducing the manufacturing cost, simplifying the manufacturing process, and improving user convenience Effect can be obtained.

9 and 10 are side views showing a structure of a chair capable of height adjustment according to a fourth embodiment of the present invention. Figs. 11 and 12 are front views of the button portion of Fig. 9, and Fig. 13 is a bottom view of the button portion of Fig.

9 to 13, a chair 400 adjustable in height according to a fourth embodiment of the present invention includes a base frame 410, a first frame 421, a second frame 422, a spring 430 A seat plate 440, and a height adjusting member 460. As shown in Fig.

In detail, the base frame 410 forms a base portion of the height adjustable chair 400. The base frame 410 may include a pair of first guide rails 411 and a pair of leg supports 417 formed to face each other.

The first guide rail 411 is formed in a long groove formed in a long bar and serves to guide the first frame 421 so that the first frame 421 to be described later can slide in one direction can do.

The seat plate 440 may be formed in a flat plate shape in which the user can sit. A second guide rail 441 may be formed at a lower portion of the seat 440. The second guide rail 441 is formed as a long groove formed in the seat 440 and serves to guide the second frame 422 so that the second frame 422 to be described later can slide in one direction .

The first frame 421 and the second frame 422 may be formed between the base frame 410 and the seat 440 to connect the base frame 410 and the seat 440.

In detail, one end of the second frame 422 can be formed to be rotatable by being pin-coupled to the lower end of the seat plate 440. The other end of the second frame 422 may be coupled to the first guide rail 411 of the base frame 410 to be movable along the first guide rail 411.

On the other hand, one end of the second frame 422 may be formed to be rotatable in a pin-coupled manner at the lower end of the base frame 410. The other end of the second frame 422 may be coupled to the second guide rail 441 of the seat 440 so as to be movable along the second guide rail 441.

The first frame 421 and the second frame 422 are formed so as to intersect with each other and the substantially middle portion of the first frame 421 and the second frame 422 is pin- And is rotatable about the pin 423 as a center.

The spring 430 is formed to have a predetermined elastic force, and the height of the chair, that is, the height of the seat 440 can be adjusted by a change in the length of the spring 430. And, the operation of the spring 430 can be controlled by the height adjusting member 460.

The height adjusting member 460 includes a lever 464, a coil spring 461, a friction portion 462, and a fixing portion 463. 11 is a state before the height adjusting member 460 is operated, and the friction portion 462 is engaged so that the length of the spring 430 is fixed, so that the height of the chair is kept fixed. 12 shows a state after the height adjusting member 460 is operated. When the lever 464 is operated from the state of FIG. 11 to the state of FIG. 12, the coil spring 461 is compressed by the lever 464 The friction portion 462 connected to the coil spring 461 is spaced apart from the fixing portion 463 by a predetermined distance. In this state, the spring 430 is contracted in a direction in which the length is shortened unless a special force is exerted on the chair. Thus, the spring 430 is connected to both ends of the spring 430, The interval between the frame 421 and the second frame 422 becomes narrow, and the chair is raised. When the chair 430 is pressed downward, the spring 430 is extended in a lengthwise direction, so that the interval between the first frame 421 and the second frame 422 connected to both ends of the spring 430 is wide The chair goes down.

By applying the spring 430 to the chair as described above, it is possible to obtain an effect of implementing a chair capable of easily adjusting the height without complicated configuration, thereby reducing manufacturing cost, simplifying the manufacturing process, and improving user convenience Can be obtained.

FIG. 14 is a perspective view showing a structure of a height adjustable chair according to a fifth embodiment of the present invention, and FIGS. 15 and 16 are side views of a chair capable of adjusting the height of FIG.

Referring to FIGS. 14, 15 and 16, a height adjustable chair 500 according to a fifth embodiment of the present invention includes a base frame 510, a first frame 521, a second frame 522, A third frame 523, a fourth frame 524, a connecting pin 525, a seat plate 540, and a backrest portion 550.

In detail, the base frame 510 forms the base of the chair 500, which is adjustable in height. Although the base frame 510 is shown in the form of a pair of bars facing each other and the two bars being connected by vertical bars, The idea of the invention is not limited to this, and various shapes of the base frame 510 capable of forming the base of the chair 500 whose height can be adjusted are applicable to the present invention.

A plurality of grooves 511 may be formed in each base frame 510. In this groove 511, a connection bar 526 to be described later can be fitted. The height of the chair 500 is adjusted according to which of the plurality of grooves 511 the connection bar 526 is inserted into.

Each of the pair of first frames 521 may be formed so that one end thereof is coupled to the base frame 510 in a pin-coupled manner.

Each of the pair of second frames 522 is pin-coupled at one end by the connecting pin 525 to the other end of the first frame 521 so that the second frame 522 is connected to the first frame 521, As shown in Fig. The other end of the second frame 522 may be connected by a connecting bar 526. The connection bar 526 can be fitted into the groove 511 of the base frame 510.

The seat 540 may be formed in a flat plate shape in which the user can sit. A third frame 523 and a fourth frame 524 may be formed below the seat 540. One end of the third frame 523 and the other end of the fourth frame 524 are fixedly coupled to the seat 540 respectively and the other ends of the third frame 523 and the fourth frame 524 are coupled to each other, The seat 540, the third frame 523, and the fourth frame 524 may be formed to form a triangle when viewed from the side. The third frame 523 and the fourth frame 524 can be coupled with the first frame 521 and the second frame 522 by the connecting pin 525. [

The backrest portion 550 is connected to the seat 540 and may be formed in a flat plate shape.

A plurality of grooves 511 are formed in the base frame 510 in which a pair of bars face each other, and the connecting bar 526 can be fitted in the groove 511, Since the height of the chair 500 is adjusted according to which of the plurality of grooves 511 the connection bar 526 is inserted into, it is possible to achieve a chair which can easily adjust the height without complicated construction, The manufacturing cost is reduced, the manufacturing process is simplified, and the user convenience is improved.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments, and that various changes and modifications may be made therein without departing from the scope of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Height adjustable chair
110: base frame
121: First frame
122: second frame
130: gas spring
140: Seat
150:
160: Adjustment button

Claims

A seat formed to allow the user to sit;
A base frame spaced apart from the seat by a predetermined distance;
At least one frame connecting the base frame and the seat; And
And at least one height adjusting member formed to connect the base frame or the frame to the seat so as to have a variable length and to adjust a distance between the seat and the base frame.

The method according to claim 1,
The base frame is formed with a guide rail having a long groove shape,
Wherein one end of the frame is formed to be slidable along the guide rail.

The method according to claim 1,
A guide rail having a long groove shape is formed on the seat,
Wherein one end of the frame is formed to be slidable along the guide rail.

The method according to claim 1,
Wherein one end of the height adjusting member engages with the frame and the other end of the height adjusting member engages with the seat.

The method according to claim 1,
Wherein one end of the height adjusting member engages with the base frame and the other end of the height adjusting member engages with the seat or the frame.

The method according to claim 1,
Wherein the height adjustment member is a gas spring.

The method according to claim 1,
The height-
lever;
A coil spring urged by the lever;
And a friction portion connected to the coil spring and receiving a predetermined elastic force from the coil spring, the friction portion being capable of contacting with the fixing portion formed on the seat or the frame.

The method according to claim 1,
The frame may include a first frame and a second frame formed to intersect with each other,
Wherein one end of the height adjusting member is coupled to one of the first frame and the second frame and the other end of the height adjusting member is coupled to the seat or the other frame, .

The method according to claim 1,
Characterized in that the one or more frames are formed such that both ends are relatively thin compared to the central portion.