KR101902770B1 - Assembly and chair with the same - Google Patents

Abstract

The present invention relates to an assembly for a chair and a chair including the same. The chair includes: a body formed in a hexahedron shape with an open upper surface; a seat panel coupled to an upper portion of the body; a connection bracket coupled to an upper end of a cylinder provided at an upper end of a leg portion of the chair and coupled to the body by a rotary shaft so that the seat panel is rotatable in a vertical direction; a height adjusting unit installed at one side of the seat panel to adjust the height of a seat of the chair; a locking portion provided on the other side of the seat panel to lock or release the forward and backward movement of a slide panel provided in the seat; and a tilting adjusting unit for adjusting the maximum tilting angle using a plurality of stages during a tilting operation for adjusting the inclination of the seat and a backrest. The front and rear positions and height of the seat, and the inclination of the seat can be adjusted while adjusting the strength in the tilting operation.

Description

[0001] ASSEMBLY AND CHAIR WITH THE SAME [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembly for a chair and a chair having the same, and more particularly to an assembly for a chair having a position and height of the seat in the forward and backward direction of the seat and a function of adjusting the inclination and tension of the seat, It is about a chair.

Generally, the chair includes a seat, a leg, and a backrest.

At the same time, the chair can be equipped with a headrest supporting the head and an armrest supporting the arm comfortably.

In recent years, chairs capable of adjusting the position and height of the seat in the front-rear direction or the angle of the backrest have been developed depending on the user's body shape and work environment.

For example, the following patent documents 1 and 2 disclose a chair assembly configuration.

The following Patent Document 1 discloses a tilting device that is provided in upper and lower cases to raise and lower a chair assembly, a tilting means that adjusts the inclination of the back plate, a tilting limiting means that restricts the degree of inclination of the back plate to multiple stages, A locking lever provided on both sides of the case and a locking lever; a limit lever provided at the tip of the case for multi-tilting; and an elasticity adjusting lever provided on the lifting lever. The elasticity adjusting lever The structure of the chair assembly is disclosed.

Patent Document 2 discloses a tilting restricting portion for setting a free tilting angle of a back plate, a multi-stage locking portion for fixing a tilting state of the back plate, an elasticity adjusting portion for adjusting the tilting strength of the back plate, a seat plate tilting portion for tilting the seat back forward, And a lift controller for adjusting the height of the chair assembly.

Korean Patent Registration No. 10-0791454 (Announcement on January 3, 2008) Korean Patent Registration No. 10-1028731 (issued on April 14, 2011)

However, the chair assemblies described in Patent Document 1 and Patent Document 2 have a complicated structure in order to provide various functions such as a backboard tilting function for adjusting the inclination of the backboard and a leftboard tilting function for adjusting the inclination of the backboard.

As a result, the workability of the chair assembly is reduced during the manufacturing process, and the human, economic, and time costs required for the manufacturing process are increased.

In addition, the chair assembly described in Patent Documents 1 and 2 has a problem in that when the tilting angle of the backrest is adjusted, the seat portion tilts backward with the backrest and tilts backward, causing the posture of the user to be inclined rearward, causing inconveniences in use .

In addition, the chair assembly according to the related art has inconvenienced the user to adjust the tension manually by manipulating the adjusting spring in the tilting operation for adjusting the inclination of the back plate and the seat.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a chair assembly capable of adjusting the position and height of the seat portion in front and rear direction, the inclination of the seat portion and the backrest according to the user's body shape and work environment, .

Another object of the present invention is to provide an assembly for a chair and a chair having the same capable of adjusting the inclination of the seat portion and the backrest in a plurality of stages during a tilting operation.

Another object of the present invention is to provide an assembly for a chair and a chair having the same, which can easily adjust the tension, i.e., the tilting, in the tilting operation of the seat portion and the backrest.

In order to achieve the above object, a chair assembly according to the present invention includes a body formed in a hexahedron shape having an opened upper surface, a seat panel coupled to an upper portion of the body, A connection bracket coupled to the body by a rotation shaft so as to be rotatable in a vertical direction so as to be rotatable in a vertical direction, a height adjusting portion provided on one side of the seat panel for adjusting a height of a seat portion of the chair, And a tilting adjuster for limiting a maximum tilting angle of the seat panel to a plurality of stages during a tilting operation of adjusting the inclination of the seat and the backrest .

In order to achieve the above object, a chair having an assembly for a chair according to the present invention includes an assembly for a chair, the position and the height of the seat portion are adjusted by using the chair assembly, And the tilting angle and the tilting strength of the backrest and the backrest are adjusted.

As described above, according to the chair assembly and the chair provided therewith, the position and the height of the seat portion in the front-rear direction and the inclination of the seat portion and the back portion can be adjusted.

According to the present invention, since the adjustment lever provided at the front of the body is extended forward and then rotated to adjust the tension of the elastic member, the user can easily adjust the strength in the tilting operation of the seat portion and the backrest Loses.

Therefore, according to the present invention, it is possible to adjust the forward and backward position, height, back tilting angle and tilting length of the seat portion according to the user's body shape and work environment by using the chair assembly, Loses.

1 is a perspective view of a chair having an assembly for a chair according to a preferred embodiment of the present invention,
FIG. 2 is a side view of a seat assembly and a seat assembly according to a preferred embodiment of the present invention;
Fig. 3 is a bottom view of the seat portion shown in Fig. 2,
Figure 4 is a top view of the assembly shown in Figure 2,
5 is a plan view of the body, from which the seat panel and the connection bracket shown in Fig. 4 have been removed,
6 is a bottom view in which the tilting adjustment portion is enlarged,
7 is an operational state view of the supporting unit.

Hereinafter, a chair assembly according to a preferred embodiment of the present invention and a chair having the same will be described in detail with reference to the accompanying drawings.

In this specification, the direction in which the backrest is installed around the seat portion is referred to as the rear of the chair, and the opposite direction is referred to as the front of the chair.

The tilting operation of the seat portion and the backrest is referred to as a tilting operation.

1 is a perspective view of a chair having an assembly for a chair according to a preferred embodiment of the present invention.

As shown in FIG. 1, a chair 10 having a chair assembly according to a preferred embodiment of the present invention includes a seat 11 on which a user sits, a leg 11 on the bottom of the seat, A backrest 13 connected to the rear side of the seat portion 11 and a seat portion 11 provided at the lower portion of the seat portion 11 to control the position and height of the seat portion 11 in the front- And a chair assembly 14 for adjusting the inclination of the backrest 13 and adjusting the tilting angle and intensity in the tilting operation and locking or releasing the tilting operation.

An armrest supporting the user's arm is mounted on both sides of the seat portion 11 or the backrest 13 and a headrest supporting the head of the user can be mounted on the upper portion of the backrest 13. [

A cylinder 15 may be installed on the upper portion of the leg portion 12 to adjust the height of the seat portion.

The seat portion 11 may include a slide panel 16 slidably coupled to the upper surface of the assembly 14 and a cushion 17 covering the upper surface of the slide panel 16 and each side wall.

The configuration of the assembly will be described in detail with reference to Figs. 2 to 6. Fig.

FIG. 2 is a side view of a seat assembly and seat assembly according to a preferred embodiment of the present invention, FIG. 3 is a bottom view of the seat portion shown in FIG. 2, FIG. 4 is a plan view of the assembly shown in FIG. FIG. 6 is a bottom view of an enlarged view of a tilting control unit. FIG. 6 is a plan view of a body having the seating panel and the connection bracket shown in FIG.

2 to 5, a chair assembly 14 according to a preferred embodiment of the present invention includes a body 20 formed in a substantially hexahedron shape having an opened upper surface, a body 20 coupled to an upper portion of the body 20 The seat panel 30 is connected to the upper end of the cylinder 15 provided at the upper end of the leg portion 12 and connected to the body 20 by the rotation shaft 31 so as to be rotatable in the up- A bracket 40, a height adjusting portion 50 provided on one side of the seat panel 30 for adjusting the height of the seat portion 11, a bracket 40 provided on the other side of the seat panel 30, A locking portion 60 for locking or releasing the forward and backward movement of the slide panel 16 and a tilting control for limiting the maximum tilting angle to a plurality of stages in a tilting operation for adjusting the inclination of the seat portion 11 and the backrest 13 (70).

In addition, the chair assembly 14 according to the preferred embodiment of the present invention may further include an intensity adjusting unit 80 for adjusting the tilting strength of the backrest 13 and the seat 11 during the tilting operation.

The body 20 may be made of a metal material such as iron to have rigidity.

The connection bracket 40 can be coupled to the upper side of the lower end of the body 20 so as to be rotatable in the vertical direction by a pair of fastening members 21 fastened to both side walls of the body 20.

The seat panel 30 is formed in a substantially rectangular plate shape as viewed from above and the slide panel 16 of the seat portion 11 can be slidably coupled to the seat panel 30 at an upper portion thereof.

To this end, two pairs of engaging projections 31 may be formed on the upper surface of the seating panel 30 so as to protrude upward.

The pair of coupling projections 31 may be spaced apart from each other by a predetermined interval in the forward and backward directions and in the leftward and rightward directions on the front side and the rear side of the seat panel 30.

A moving hole 161 may be formed in the slide panel 16 at a position corresponding to each of the engaging projections 31 so as to be elongated in the forward and backward directions.

A first adjustment lever 51 of the height adjuster 50 is provided on one side of the seat panel 30 such as the right side of the seat panel 30 so as to be movable in the left and right direction. The second control lever 61 of the tilting control unit 60 and the third control lever 81 of the tilting control unit 70 can be provided to be movable in the left and right direction, respectively.

A guide protrusion 32 is formed on the upper surface of the seat panel 30 along the front and rear direction so as to guide the slide panel 16 in the forward and backward directions. Grooves 163 may be formed.

Accordingly, the slide panel 16 can be prevented from flowing in the left-right direction and the vertical direction as the guide protrusion 32 of the seat panel 30 moves in the forward and backward directions in a state where the guide protrusion 32 is engaged with the guide groove 163 .

The connecting bracket 40 is coupled to the rear end of the body 20 and includes a body portion 41 and a pair of body portions 41 extending forward from both sides of the body portion 41 so as to be formed in an approximately & As shown in FIG.

Each of the extension portions 42 may be formed with a pair of engagement holes through which a fastening member 21 fastened to both side walls of the body 20 is coupled.

Therefore, the connecting bracket 40 can be rotated in the vertical direction with the fastening member 21 as a rotation axis in the tilting operation of the seat portion 11 and the backrest 13. [

A pair of fixing arms 43 may be extended toward the front at the center of the front end of the connecting bracket 40.

The pair of fixed arms 43 serve to prevent rotation of the moving block 84 by fixing both ends of the moving block 81 of the strength adjusting portion 80 to be described below.

In the front end portion of the connection bracket 40, a coupling shaft 44, to which the seat panel 30 is rotatably coupled in the longitudinal direction, may be installed along the left and right direction.

The seating panel 30 is rotatably connected to the connecting bracket 40 and the engaging shaft 44 so that the seat panel 11 and the backrest 13 are rotated about the engaging shaft 44 in the tilting operation It can rotate smoothly along the forward and backward directions.

Here, the support unit 22 for supporting the front end portion of the seat panel 30 may be rotatably installed in the body 20.

The support unit 22 can stably support the front end portion of the seat panel 30 while rotating together with the seat panel 30 in the forward and backward direction.

7 is an operational state diagram of the support unit.

FIG. 7A shows a state in which the support unit is seated on the front end of the body, and FIG. 7B shows a state in which the support unit is rotated by rotation of the seat panel.

5 and 7, the support unit 22 is formed in a substantially U-shape as viewed from above, and the lower ends of both sides of the support unit 22 are axially coupled to the support unit 22 The support member 23 can be rotatably installed.

The support member 23 supports a front end portion of the seating panel 30 that is seated on the upper surface of the supporting member 23 and has an engagement projection portion 24 Can be protruded upward.

As described above, according to the present invention, since the supporting unit is rotatably installed at the front end of the body, the front end of the seat panel can be stably supported by rotating the supporting unit during the tilting operation of the seat part and the backrest.

The height adjusting portion 50 is rotated in the vertical direction by the lateral movement of the first adjusting lever 51 and the first adjusting lever 51 to press the opening and closing pins provided at the upper end of the cylinder 15 to release the locking And a first wire 53 connecting the pressing piece 52 and the first adjusting lever 51 to the pressing piece 52. [

Both ends of the first wire 53 may be connected to the connecting bar 55 of the cylindrical body 54 to which the inner end of the first control lever 41 and the pressing piece 52 are connected.

The pressing piece 52 is formed in a substantially rectangular plate shape and a cylindrical body 54 having a shaft function can be provided below the pressing piece 52 so that the pressing piece 52 can rotate in the up and down direction.

A bar-shaped support piece 56 is connected to one side of the cylindrical body 54, for example, a left end thereof, and an elastic spring 54 for providing an elastic force such that the support piece 56 returns to its original position, (57) can be installed.

When the first control lever 51 is moved toward the outside of the body 20 by the pulling operation of the user, the pressing piece 52 connected to the first control lever 51 by the first wire 53, Closing pin of the upper end of the cylinder 15 while rotating around the body 54 to release the locking.

Accordingly, the user can adjust the height of the seat portion 11 by moving the seat portion 11 upward or downward.

On the other hand, when the pulling operation of the user is released, the supporting piece 56, the cylindrical body 54, the pressing piece 52 and the first adjusting lever 51 are returned to their original positions by the elastic force of the elastic spring 57 do.

3 and 4, the locking portion 60 locks the forward and backward movement of the slide panel 16 by the lateral movement of the second control lever 61 and the second control lever 61, (Not shown).

The locking member 62 is formed in a substantially rectangular plate shape and is connected to the inner end of the second control lever 61.

At least one or more locking protrusions 63 may be formed on the inner surface of the locking member 62 to be coupled to the slide panel 16 between the plurality of adjustment protrusions 162 formed along the forward and backward directions.

3, the number of the locking protrusions 63 is three, but the present invention is not limited thereto. The locking protrusions 63 may be modified to form one, two, or four or more locking protrusions 63.

A restoring spring 64 may be provided at an inner end of the second adjusting lever 61 to provide a restoring force to return the second adjusting lever 61 to its original position.

4 to 6, the tilting adjusting unit 70 includes a third adjusting lever 71, a rotating member 72 rotating in the left and right direction by the lateral movement of the third adjusting lever 71, And second and third wires 73 and 74 connected to both sides of the third control lever 71 and the rotating member 72. [

The third control lever 71 is provided on the front side of the second control lever 61 and one end of the second and third wires 73 and 74 are respectively coupled to the inner end of the third control lever 71 have.

The rotating member 72 functions to adjust the tilting angle by rotating around a shaft installed vertically to the body 20 through the rear end portion.

To this end, the rotary member 72 is formed in a substantially semi-circular plate shape as viewed from above, and one ends of the second and third wires 73 and 74 may be coupled to both side ends of the rotary member 72.

A limiting protrusion 75 for sequentially contacting the plurality of limiting protrusions 45 formed on the bottom surface of the connecting bracket 40 and defining a tilting angle is formed at the rear end of the rotating member 72 .

For example, when the tilting angle is adjusted to four tiers, the plurality of limiting protrusions 45 are formed in three (451 to 453), and each of the limiting protrusions 451 to 453 has one side, The height can be increased.

The tilting angle of the seat portion 11 and the backrest 13 is limited to about 0 to 10 degrees when the limited protruding portion 75 is in contact with the first limiting protrusion 451 having the highest height and the second limiting protrusion 452 ), It may be limited to about 15 [deg.] To 25 [deg.].

The tilting angle of the seat portion 11 and the backrest 13 is limited to about 30 to 40 degrees when the limiting protrusion 75 is in contact with the third limiting protrusion 453, And may be limited to about 45 to 55 degrees in a state in which it is arranged so as not to come into contact with the plurality of limiting projections 45 when moved.

As described above, according to the present invention, the limiting protrusion having different heights is formed at the rear end of the body, and the tilting angle of the seat portion and the backrest is adjusted to a plurality of stages by rotating the rotating member of the tilting adjustment portion so as to selectively contact the respective limiting protrusions Can be adjusted.

Of course, the present invention is not limited thereto, and the angle of the tilting angle and the angle of each stage can be variously changed.

On the other hand, the first to third wires (53, 73, 74) may be provided with a protective tube to prevent damage or breakage due to contact with other parts or friction.

5, the strength adjusting portion 80 includes a spring 82 installed along the forward and backward directions in the inner space of the body 20 to provide an elastic force, a through hole at the center of the spring 82, A moving block 84 which moves in the forward and backward direction by the rotation of the adjusting shaft 83 and elastically deforms or releases the spring 82 and an adjusting shaft 83 which is provided at the front end of the adjusting shaft 83, And a fourth control lever 81 for rotating the shaft 83. [

The adjustment shaft 83 may be provided with a threaded bolt on the outer circumferential surface.

A moving block 84 is provided at the rear end of the adjusting shaft 83 and the moving block 84 is moved forward or backward in accordance with the rotating direction of the adjusting shaft 84 to press the spring 82 to elastically deform Or released.

For example, when the fourth control lever 81 is rotated in the clockwise direction when viewed from the front and the moving block 84 is moved forward, the spring 82 is elastically deformed so as to be shortened in length, and the tilting strength becomes stronger .

On the other hand, when the fourth control lever 81 is rotated counterclockwise to move the moving block 84 rearward, the tilting strength becomes weaker as the length of the spring 82 becomes longer.

The fourth control lever 81 is coupled to the front end of the control shaft 83 so as to protrude forward and forward and a receiving space for receiving the fourth control lever 81 is formed on the front surface of the body 20 have.

That is, according to the present invention, when adjusting the tilting strength, the fourth control lever can be projected forward to be rotatable, and normally, the fourth control lever can be moved backward to be accommodated in the front end of the body.

Accordingly, the present invention can prevent the fourth control lever, which is provided at the front end of the body, from projecting forward to be interfered with the thigh of the user, and can make the appearance of the assembly look good.

Next, a method of operating a chair assembly and a chair having the same according to a preferred embodiment of the present invention will be described in detail.

First, a method for adjusting the height of a seat of a chair having an assembly for a chair according to a preferred embodiment of the present invention will be described.

When the user pulls the first control lever 51 outwardly, that is, to the right side of the body 20, the pushing piece 52 connected to the first control lever 51 through the first wire 53, And the opening / closing pin provided at the upper end of the cylinder 15 is pressed downward.

As a result, the seat 15 is in a state in which the height of the seat portion 11 can be adjusted while the closed state of the cylinder 15 is released.

On the other hand, when the user releases the pulling operation of the first control lever 51, the urging force of the resilient spring 57 provided at the lower portion of the supporting piece 56 causes the urging piece 52 to move around the cylindrical body 54 When the cylinder 15 is rotated upward, as the cylinder 15 is closed, the expansion and contraction state of the cylinder 15 is fixed.

Next, a method of adjusting the front-rear direction position of the seat portion 11 will be described.

The second control lever 61 is in a state in which it is normally moved to the inside of the body 20 by the elastic force of the restoring spring 64.

The locking protrusion 63 of the locking member 62 connected to the inner end of the second control lever 61 is engaged with a part of the plurality of adjustment projections 162 formed on the slide panel 16, Lock the movement.

If the second control lever 61 is pulled outwardly, that is, leftward, of the body 20 while the user is seated in the seat 11, the locking member 62 are also shifted to the left, the locking projections 63 and the adjusting projections 162 are separated from each other, and the locking state of the slide panel 16 is released.

Thus, the slide panel 16 can move forward or backward when the user moves the seat portion 11 forward or backward.

On the other hand, when the user releases the pulling operation of the second control lever 61, the second control lever 61 moves to the inside of the body 20 by the elastic force of the restoring spring 64 and returns to the original position .

The locking protrusion 63 formed on the locking member 62 engages with a part of the plurality of adjustment projections 162 formed on the slide panel 16 and locks the sliding movement of the slide panel 16 again.

As described above, according to the present invention, the locking state of the slide panel is released through the pulling operation of the second control lever, so that the seat portion can be moved in the forward and backward directions to adjust the forward and backward positions of the seat portion according to the user's body shape and work environment.

Further, according to the present invention, by releasing the pulling operation of the second control lever, the locking protrusion formed on the locking member can be returned to the locking state by engaging with a part of the plurality of regulating protrusions formed on the slide panel.

Next, a method of adjusting the tilting angle of the seat portion and the backrest will be described.

When the user manipulates the third control lever 71 toward the inside or outside of the body 20, the rotary member 72, to which one end of the second and third wires 73 and 74 are connected on both sides, It rotates counterclockwise or clockwise around the installed shaft.

At this time, the limited protruding portion 75 formed at the rear end of the rotary member 72 may be attached to any one of the plurality of protrusions 45 or the bottom surface of the connection bracket 40 formed at different heights on the bottom surface of the connection bracket 40 And is disposed at a contactable position.

The user can manipulate the third control lever 71 to move left or right to change the position of the limited protruding portion 75 so as to limit the maximum angle in the tilting operation of the seat portion 11 and the backrest 13 .

At this time, the user rotates the fourth control lever 81 clockwise or counterclockwise after pulling the fourth control lever 81 provided at the front end of the body 20 forward.

Then, the adjusting shaft 83 connected to the fourth adjusting lever 81 rotates, and the moving block 84 fastened to the rear end of the adjusting shaft 83 moves forward and backward to press or release the spring 82 .

Accordingly, the present invention can adjust the strength of the seat portion and the backrest during the tilting operation by rotating the fourth control lever.

Through the above-described process, the present invention can adjust the position and height of the seat portion in the front-rear direction, and the tilting angle and strength of the seat portion and the backrest by using the chair assembly.

Although the invention made by the present inventors has been described concretely with reference to the above embodiments, the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

The present invention is applied to chair technology for adjusting the position and height of the seat portion in the front-rear direction, the tilting angle of the seat portion and the backrest, and the tilting strength by using the chair assembly.

10: Chair 11: Seat
12: leg portion 13: backrest
14: Multifunctional assembly 15: Cylinder
16: Slide panel 161: Moving ball
162: regulating projection 163: guide groove
17: Cushion
20: body 21: fastening member
22: support unit 23: support member
24: engaging projection 30: seat panel
31: engaging projection 32: guide projection
40: connection bracket 41: body part
42: extension part 43: fixed arm
44: engaging shaft 45, 451 to 453:
50: height adjustment part 51: first adjustment lever
52: pressure piece 53: second wire
54: cylindrical body 55: connecting bar
56: Support piece 57: Elastic spring
60: locking portion 61: second control lever
62: locking member 63: locking projection
64: Restoring spring
70: tilting control unit 71: third control lever
72: rotating member 73, 74: second and third wires
75:
80: intensity adjusting part 81: fourth adjusting lever
82: spring 83: adjusting shaft
84: Moving block

Claims (8)

A body formed in a hexahedron shape whose upper surface is opened,
A seat panel coupled to an upper portion of the body,
A connection bracket coupled to an upper end of a cylinder provided at an upper end of a leg portion of the chair and axially coupled to the body by a rotation shaft so that the seat panel is rotatable in a vertical direction,
A height adjuster installed on one side of the seat panel for adjusting a height of a seat of a chair,
A locking portion provided on the other side of the seat panel for locking or releasing the forward and backward movement of the slide panel provided in the seat portion,
A tilting adjuster for limiting the maximum tilting angle to a plurality of stages in a tilting operation for adjusting the inclination of the seat portion and the backrest,
And an intensity adjusting unit for adjusting the tilting strength at the time of tilting operation of the backrest and the seat,
The connecting bracket is coupled to the lower end of the body so as to be rotatable in the vertical direction by a pair of fastening members respectively fastened to both side walls of the body,
Two pairs of engaging projections are formed to protrude upward so that the slide panel of the seat portion is slidably engaged with the upper surface of the seat panel,
The slide panel is provided with a moving hole extending in the forward and backward direction at a position corresponding to each engaging projection,
Wherein a support unit for supporting a front end of the seat panel is rotatably installed in the body during rotation of the seat panel,
And a support member is installed on the upper portion of the support unit such that both lower ends thereof are rotatably coupled to the support unit,
Wherein the support member is formed with a coupling protrusion coupled to a coupling groove formed on a bottom surface of a front end of the seating panel while supporting a front end of the seating panel seated on an upper surface thereof. The method according to claim 1,
Wherein the strength adjusting portion includes a spring installed along the front and rear direction in the inner space of the body and providing an elastic force,
The through-hole in the center of the spring includes an adjustment shaft,
A moving block that moves in the forward and backward direction by rotation of the adjusting shaft to elastically deform or release the spring,
And a fourth adjusting lever which is provided on the front end of the adjusting shaft in such a manner that it can be retracted in the forward and backward directions and rotates the adjusting shaft by a rotating operation of the user,
Wherein a space for receiving the fourth control lever is formed at a front end of the body. delete delete The method according to claim 1,
The height adjuster includes a first adjusting lever installed on one side of the seat panel so as to be movable inside or outside the body,
A pressing piece that rotates in the up-down direction by the movement of the first control lever to press the opening / closing pin at the upper end of the cylinder provided on the leg portion to release the locking,
And a first wire connecting the first control lever and the pressing piece,
And a cylindrical body having an axis function to rotate the pressing piece in a vertical direction is provided under the pressing piece,
A bar-shaped supporting piece is connected to one side of the cylindrical body,
Wherein an elastic spring is provided at a lower portion of the supporting piece to provide an elastic force so that the supporting piece returns to its original position. The method according to claim 1,
Wherein the locking portion includes a second adjusting lever movably installed on the other side of the body so as to be movable inward or outward,
And a locking member for locking or releasing the forward and backward movement of the slide panel by the movement of the second control lever,
Wherein at least one locking protrusion is formed on the inner side surface of the locking member, the locking protrusion being coupled between the plurality of adjustment protrusions formed on the slide panel. The method according to claim 1,
Wherein the tilting adjusting portion includes a third adjusting lever movably installed on the other side of the body so as to be movable inward or outward,
A rotating member that rotates by the movement of the third control lever,
And second and third wires respectively connected to both sides of the third control lever and the rotary member,
Wherein a limiting protrusion is formed at a rear end of the rotating member to sequentially contact the plurality of limiting protrusions formed on the bottom surface of the connecting bracket in a rotating operation of the rotating member to define a maximum tilting angle during a tilting operation of the seat portion and the backrest Assemblies for chairs. 8. A chair assembly comprising: a chair assembly as claimed in any one of claims 1, 2 and 5 to 7,
Wherein the chair assembly is used to adjust the front and rear position and height of the seat portion and adjust the tilting angle and tilting strength of the seat portion and the backrest.

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