KR101623817B1 - Multi functional assembly and chair with the same - Google Patents

Abstract

The present invention relates to a multi-functional assembly and a chair with the same. The multi-functional assembly comprises: a body formed in the shape of a hexahedron with an opening on the top surface; a first control lever unit installed on one side of the body to be able to rotate vertically and to control the height of a seat unit; a second control lever unit installed on the other side of the body to be able to rotate forward and backward; and a tilting control unit to lock or release a back and the seat unit by linking to the operation of the second control lever unit. The present invention can control the height of the seat unit and the tilting angle of the back, can make the seat unit slide up, and can lock or release the tilting operation.

Description

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

The present invention relates to a multifunctional assembly and a chair having the multifunctional assembly. More particularly, the present invention relates to a multifunctional assembly having a front-rear direction position and height of the seat portion, a tilt adjustment and locking function of the backrest, .

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, a limit lever provided at the tip of the case for multi-tilting, and an elasticity adjusting lever provided on the lifting 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 multistage locking portion for fixing a tilting state of the back plate, an elasticity adjusting portion for adjusting a 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 disclosed in Patent Documents 1 and 2 only provide the tilting function and the height adjustment function of the seat, and the forward / backward movement function of the seat is not applied.

As described above, in the case of the chair according to the related art, there is a limit in that the sliding function of the seat is not provided in the assembly itself by applying a method of providing a plurality of plates on the seat portion and sliding the seat.

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 .

The chair assemblies described in Patent Document 1 and Patent Document 2 have a problem in that when a plurality of stop grooves or locking grooves are formed and locked in a multi-stage when the angle of the backrest is adjusted, the inclination of the backrest can be finely adjusted There was a difficult problem.

An object of the present invention is to provide a multifunctional assembly and a chair having the multifunctional assembly capable of adjusting and locking the inclination angle of the backrest, the back and forth position of the seat portion according to the body shape and the working environment of the user, .

It is another object of the present invention to provide a multifunctional assembly capable of locking the tilt adjustment function of the seat portion and the backrest together with the forward / backward position, height and angle adjustment function of the seat, and a chair having the same.

Another object of the present invention is to provide a multifunctional assembly and a chair having the multifunctional assembly, which can slide the seat portion backward upward when adjusting the inclination of the backrest.

In order to achieve the above-mentioned object, a multifunctional assembly according to the present invention includes a body formed in a hexahedron shape having an opened top face, a first adjustment mechanism provided on one side of the body so as to be vertically rotatable, And a tilting adjusting unit for locking or releasing the tilting operation of the backrest and the seat in conjunction with the operation of the second adjusting lever unit, wherein the tilting adjusting unit includes a lever portion, a second adjusting lever portion rotatably installed on the other side of the body, A hinge shaft and a rotary shaft are installed across the side walls of the body, and a bracket coupled to the hinge shaft and the rotary shaft is rotatable in the vertical direction about the rotary shaft, and the connection shaft, the hinge shaft, And the upper bracket to be coupled is characterized in that the seat portion is slid up upward in the rear side during the rotation operation of the bracket .

The present invention relates to an adjustable lever device comprising a third adjusting lever portion provided on one side of a body so as to be rotatable in an up and down direction and a second adjusting lever portion which is slidably coupled to an upper portion of the body in a forward and backward direction, And the like.

In order to achieve the above object, a chair having a multifunctional assembly according to the present invention includes a multifunctional assembly. The multifunctional assembly is used to adjust the height of the seat and the tilting angle of the backrest, And the seat portion is slid up and rearward when the tilting angle of the backrest is adjusted.

As described above, according to the multifunctional assembly and the chair having the same according to the present invention, it is possible to provide a function of locking or unlocking the height of the seat portion, the tilting angle of the backrest, and the up slide and tilting operation of the seat portion .

According to the present invention, it is possible to control the position of the seat portion in the front-rear direction by operating the operation lever.

Therefore, according to the present invention, it is possible to use the multifunctional assembly to comfortably sit by using the forward and backward position of the seat portion, the tilt angle of the backrest, and the up-slide function of the seat portion according to the user's body shape or work environment Is obtained.

1 is a side view of a chair with a multifunctional assembly according to a preferred embodiment of the present invention;
2 is a perspective view of a multifunctional assembly according to a preferred embodiment of the present invention,
FIG. 3 is a plan view showing a state in which the upper bracket is removed in FIG. 2,
4 is a cross-sectional view taken along the line A-A 'shown in Fig. 2,
5 is a bottom view of the position adjusting portion,
6 is a diagram illustrating a tilting operation and an up-slide operation state of the multifunctional assembly,
7 is a diagram illustrating a front-rear direction position adjustment operation state of the seat portion;

Hereinafter, a multifunctional 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.

1 is a side view of a chair with a multifunctional assembly according to a preferred embodiment of the present invention.

As shown in FIG. 1, a chair 10 having a multifunctional assembly according to a preferred embodiment of the present invention includes a seat 11 on which a user is seated, a leg provided on a lower portion of the seat, A backrest 13 connected to the rear side of the seat portion 11 and a lower portion of the seat portion 11 for adjusting the height of the seat portion 11, (Hereinafter referred to as " assembly ") 14 for performing a 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 11.

The configuration of the assembly will be described in detail with reference to FIGS. 2 and 3. FIG.

FIG. 2 is a perspective view of a multifunctional assembly according to a preferred embodiment of the present invention, FIG. 3 is a plan view showing a state in which an upper bracket is removed in FIG. 2, and FIG. 4 is a cross-sectional view taken along line A-A ' .

2 and 3, the assembly 14 includes a body 20 formed in a hexahedron shape having an opened upper surface, a body 20 mounted on one side of the body 20, The backrest 13 and the seat portion 11 are tilted according to the operation of the first control lever portion 30, the second control lever portion 40 provided on the other side of the body 20, and the second control lever portion 40, And a tilting adjuster 50 for locking or releasing the operation.

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

A hinge shaft 21 and a rotary shaft 22 are provided across the both side walls at the central portion and the rear end of the body 20 and at the upper rear portion of the body 20, (23) can be combined.

The bracket 23 rotates about the rotary shaft 22 and functions to tilt the seat portion 11 and the backrest 13.

To this end, the lower end of the backrest 13 can be coupled to the rear end of the bracket 22.

An upper bracket 24, on which first and second side walls 25 and 26 are disposed, may be coupled to the upper portion of the body 20 at both sides of the side wall of the body 20.

The upper bracket 24 is formed in a substantially rectangular plate shape and the first and second side walls 25 and 26 can be formed on the lower surface of the upper bracket 24 in parallel to the longitudinal direction of the upper bracket 24 .

A connecting shaft 27 can be coupled to the front end of the upper bracket 24 across the first and second side walls 25 and 26 and both side walls of the body 20.

The upper bracket 24 is connected to the front end of the body 20 and the front end of the upper bracket 24 through a connecting shaft 27. The upper bracket 24 is rotatable around the connecting shaft 27 May be coupled to the body (20).

The rotary shaft 22 may be installed through both side walls of the body 20 and both side walls of the bracket 23 and the first and second side walls 25 and 26 of the upper bracket 24.

The bracket 23 and the backrest 13 can be returned to their original positions when the force applied to the seat portion 11 is removed An elastic member 28 may be provided.

The bracket 23 rotates about the rotary shaft 22 in the vertical direction and the upper bracket 24 can be slid toward the rear upper side in the process of rotating the bracket 23.

Accordingly, the seat portion 11 provided at the upper portion of the upper bracket 23 can also be slid toward the rear upper side.

As described above, according to the present invention, the seat portion can be slid upward to the rear side during a tilting operation for adjusting the inclination of the backrest.

Hereinafter, this function is referred to as an " up slide function ".

To this end, a connecting shaft 27, a hinge shaft 21, and a rotary shaft (not shown) are respectively formed at the front and rear ends of both side walls of the body 20 and the first and second side walls 25 and 26 of the upper bracket 24, 22 may be formed through the first through third through holes 291 through 293, respectively.

The first through third moving balls 291 through 293 may be formed in the shape of a long hole to implement the up slide function, respectively.

For example, the first moving hole 291 may be inclined upward toward the rear side so that the connecting shaft 27 can move backward.

The second moving hole 292 may be inclined upward toward the front side so that the hinge shaft 21 can move forward.

The third moving hole 293 may be inclined toward the front lower side so that the rotary shaft 22 can move downward forward.

That is, the bracket 23 rotates in the vertical direction about the rotary shaft 22 to tilt the backrest 13.

The upper bracket 24 is axially coupled to the body 20 and the bracket 23 at the front end, the center portion, and the rear end, respectively, and as each axis moves along the first to third moving holes 291 to 293, The seat portion 11 can be slid upwards rearward by the rotational movement of the bracket 23. [

A cover may be coupled to the front and rear ends of the body 20 and both sides of the upper bracket 24 to prevent dust or foreign matter from entering the body 20.

The first control lever portion 30 functions to adjust the height of the seat portion 11 by locking or releasing the stretching operation of the cylinder 15 provided on the leg portion 12.

The first control lever 30 includes a first control lever 31 rotatably installed on one side of the body 20 such as the left side of the body 20 and a second control lever 31 coupled to the outer edge of the first control lever 31, And a pressing piece 33 integrally formed on the inner end of the first handle 32 and the first control lever 31 and pressing the opening and closing pin provided at the upper end of the cylinder 15 to release the locking .

The first adjusting lever 31 is bent at least once so that the pressing piece 33 is disposed at the upper end of the cylinder 15 and the pressing piece 33 is arranged at the upper end of the cylinder 15, The opening / closing pin can be pressed or released by elevating and lowering in the vertical direction by the rotational movement of the adjusting lever 31. [

The second control lever unit 40 is connected to the tilting control unit 50 to transmit the operation force of the user to the tilting control unit 50.

To this end, the second control lever portion 40 includes a second control lever 41 which is rotatably installed at one side of the body 20, for example, the right side in the front-rear direction, A rotation pin 43 provided as a rotation center of the second control lever 41 and a stopper 44 for restricting the rotation angle of the second control lever 41 during the rotation of the second control lever 41 .

The stopper 44 is formed in a hexahedron shape having an open front face and the stopper 44 is provided with a second control lever 41 A space through which the inner end moves can be formed.

Thus, the second control lever 41 can rotate about the rotation pin 43 in the longitudinal direction. Here, as the inner end of the second control lever 41 is disposed in the movement space of the stopper 44, the rotation angle of the second control lever 41 is limited to an angle corresponding to the width of the movement space.

The tilting adjuster 50 functions to fix or release the upper end of the bracket 23 to lock or release the rotational motion of the bracket 23 in accordance with the rotation of the second adjusting lever 41.

The tilting adjuster 50 includes a center wall 51 provided inside the body 20 and a tilting adjuster 50 which is installed on the center wall 51 so as to be movable in forward and backward directions and fixes the tip of the bracket 23, And a transmission link 53 for transmitting the rotational force of the first control lever 52 and the second control lever 41 to the fixed piece 52.

The center wall 51 is provided to cross both side walls of the body 20 and a support wall 54 formed in a U shape when viewed from the top may be formed on the front surface of the center wall 51 .

The support wall 54 can function to support the fixing piece 52 in a horizontal state so as to be movable in the front-rear direction.

A fixing plate 55 is formed on one side of the support wall 54 and a fixing bolt can be fastened to the fixing plate 55 through a central portion of a torsion spring provided as a transmission link 53.

One end of the transmission link 53 is connected to the inner end of the second control lever 41 and the other end of the transmission link 53 is connected to the fixed end (Not shown).

The fixing piece 52 can move in the forward and backward directions by the rotational movement of the transmission link 53 in a state where it is horizontally installed between the center wall 51 and the support wall 54. [

Here, the front wall of the bracket 23 may be formed with a locking groove so that the rear end of the fixing piece 52 is hooked when the fixing piece 52 moves backward.

2, the multifunctional assembly 14 according to the preferred embodiment of the present invention includes a third control lever portion 60 and an upper bracket 24 provided on one side of the body 20, And a position adjusting unit 70 slidably movably coupled to an upper portion of the seat 11 and adjusting the position by moving the seat 11 in the forward and backward directions.

5 is a bottom view of the upper bracket, the third control lever portion, and the position adjusting portion.

The third control lever unit 60 rotates in the vertical direction to fix or release the slide panel 71 provided in the position adjustment unit 70.

2 and 5, the third control lever portion 60 includes a third control lever 61 rotatably installed at one side of the upper bracket 24, for example, at the lower left end thereof, A third handle 62 coupled to an outer end of the third control lever 61 and a restoration spring 63 installed on an inner end outer peripheral surface of the third control lever 61 and providing a restoring force to the third control lever 61, . ≪ / RTI >

The position adjuster 70 includes a slide panel 71 slidably coupled to the upper bracket 24 along the forward and backward directions and an inner end of a third control lever 61 provided at one side of the slide panel 71, And is inserted into a plurality of adjustment holes 241 formed in the upper bracket 24 to be engaged with the forward and backward movements of the slide panel 71 And a locking member 73 for locking or releasing the locking member 73.

In addition, the position adjusting unit 70 may further include a return spring 74 for providing the slide panel 71 with a restoring force.

One end of the return spring 74, for example, the front end thereof is coupled to the slide panel 71, and the other end, that is, the rear end of the return spring 74 can be coupled to the upper bracket 24.

The return spring 74 is elastically deformed so as to increase its length during the forward movement of the slide panel 71. When the force applied to the slide panel 71 is removed, the return spring 74 provides a restoring force .

A plurality of adjustment holes 241 may be formed at predetermined intervals in order to fix the slide panel 71 to the moved position by moving the slide panel 71 in the forward and backward directions on one side of the upper surface of the upper bracket 24.

The slide panel 71 is formed in a substantially rectangular plate shape and bent portions 75 are formed at both side ends of the slide panel 71 so as to cover both side ends of the upper bracket 24, .

One or more guide members 76 for guiding the slide panel 71 to slide smoothly may be installed in each of the bent portions 75.

When the third control lever 61 is rotated upward, the distal end of the lock member 73 provided at the inner end of the third control lever 61 is separated from the control hole 241, The lock state is released and the movable state is movable along the forward and backward directions.

When the external force applied to the third control lever 61 is removed, the third control lever 61 is rotated downward by the restoring force of the restoring spring 63.

The lock member 73 provided at the inner end of the third control lever 61 is inserted into any one of the plurality of adjustment holes 241 formed in the upper bracket 24 to move the slide panel 71 forward and backward You can lock the action.

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

First, a method of adjusting the height of the seat portion will be described.

When the user pulls the first handle 32 coupled to the outer end of the first control lever 31 upward, the first control lever 31 rotates upward and the first control lever 31 The pressing piece 33 provided at the inner end presses the opening / closing pin of the upper end of the cylinder 15 coupled to the center of the body 20 downward.

As a result, the closed state of the cylinder 15 is released and the height of the cylinder 15 can be adjusted.

On the other hand, when the user releases the pulling operation of the first control lever 31, the opening / closing pin is raised to seal the cylinder 15, and the pushing piece 33 is rotated upward to rotate the first control lever 31 Return to the original position.

Thus, the expansion and contraction state of the cylinder 15 is fixed.

Next, referring to Fig. 6, a method of adjusting the tilting angle of the backrest and an up-slide operation method of the seat portion will be described.

6 is a diagram illustrating a tilting operation and an up-slide operation state of the multifunctional assembly.

When the user pulls back the second handle 42 coupled to the outer end of the second control lever 41 in the state where the user is seated in the seat portion 11 and is connected to the inner end of the second control lever 41 The transmission link 53 rotates about the fixed bolt.

Then, the fixing piece 52 connected to the one end of the transmission link 53 with the rear end moves forward.

The bracket 23 becomes rotatable in the vertical direction as the fixing piece 52 is detached from the engagement groove formed in the front wall.

Thus, when the user applies a force to the backrest, the bracket 23 connected to the lower end of the backrest 13 rotates downward.

The bracket 23 and the body 20 are rotatably coupled by the hinge shaft 21 and the rotary shaft 22. The upper bracket 24 is connected to the connecting shaft 27 and the hinge shaft 21, And is coupled to the body 20 by the rotation shaft 22.

Accordingly, the upper bracket 24 is slid up toward the rear upper side by the rotational motion of the bracket 23, as shown in Fig.

As described above, according to the present invention, when the backrest is tilted upwards, the seat portion is slid upwards to the rear side, so that the posture of the user can be comfortably maintained while the seat portion is tilted.

On the other hand, when the user pushes the second operation lever 41 forward, as the second operation lever 41 rotates forward, the transmission link 53 is moved in the direction opposite to the backward rotation of the second operation lever 41 .

The fixing piece 52 is moved backward by the rotation of the transmission link 53 and is engaged with the engaging groove formed on the front wall of the bracket 23. [

Thus, the tilting angle of the backrest 13 and the up-slide operation state of the seat portion 11 can be locked.

On the other hand, when the user removes the force applied to the backrest 13 in a state where the second operation lever 41 is pulled back, the bracket 23 is released from the elastic state of the elastic member 28 It is possible to return to the original position.

Next, a method of adjusting the front-rear direction position of the seat portion with reference to 7 will be described.

Fig. 7 is a view illustrating the front-rear direction position adjustment operation state of the seat portion.

When the user pulls upward the third handle 62 coupled to the outer end of the third operation lever 61, the lock member 73 provided on the inner end of the third operation lever 61 rotates, The tip end of the lock member 73 is separated from the one of the plurality of adjustment holes 241 formed in the upper bracket 24. [

Thus, the user can move the seat portion 11 forward or backward to adjust the forward and backward positions of the seat portion 11.

At this time, the slide panel 71 coupled to the lower surface of the seat portion 11 slides in the front-rear direction along the upper surface of the upper bracket 24 using the bent portions 75 on both sides.

When the user removes the force applied to the third handle 62, the third operating lever 61 rotates downward by the restoring force of the restoring spring 63 provided at the inner end.

Therefore, when the tip of the lock member 73 is inserted into any one of the plurality of adjustment holes 2410 formed in the upper bracket 24, the slide panel 71 is locked in a state in which it is impossible to move forward and backward.

On the other hand, when the user removes the force applied to the seat portion 11 in a state in which the third handle 62 is pulled upward, the slide panel 71 returns to the initial position by the restoring force of the return spring 74 .

Through the above-described process, the present invention can provide a locking or unlocking function of the height of the seat portion, the tilting angle of the backrest, and the up-slide and tilting operation of the seat portion.

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 an assembly technique for a chair that provides a locking or unlocking function of the height of the seat, the tilting angle of the seat back, and the up-slide and tilting action of the seat.

10: Chair 11: Seat
12: leg portion 13: backrest
14: Multifunctional assembly 15: Cylinder
20: Body 21: Hinge shaft
22: rotating shaft 23: bracket
24: upper bracket 241:
25, 26: first and second side walls 27:
28: elastic members 291 to 293: first to third moving balls
30: first control lever part 31: first control lever
32: first handle 33: pressure piece
40: second adjusting lever part 41: second adjusting lever
42: second handle 43: rotating pin
44: stopper 50: tilting control unit
51: center wall 52:
53: transmission link 54: support wall
55: Fixing plate 60: Third control lever part
61: third control lever 62: third handle
63: restoring spring 70:
71: slide panel 72: support member
73: Locking member 74: Return spring
75: bent portion 76: guide member

Claims (9)

A body formed in a hexahedron shape whose upper surface is opened,
A first adjusting lever part installed on one side of the body so as to be vertically rotatable and adjusting the height of the seat part,
A second adjusting lever part provided on the other side of the body so as to be rotatable in forward and backward directions,
And a tilting adjusting unit for locking or releasing a tilting operation of the backrest and the seat in conjunction with the operation of the second adjusting lever unit,
A connection shaft, a hinge shaft and a rotation shaft are installed across both side walls of the body,
The bracket coupled to the hinge shaft and the rotary shaft is rotatable in the vertical direction about the rotary shaft,
An elastic member for providing a restoring force to the bracket is provided on an outer circumferential surface of the rotating shaft,
The upper bracket coupled to the connecting shaft, the hinge shaft, and the rotating shaft is formed in a rectangular plate shape, and the seat portion is slid upwards in the rearward direction during the rotation operation of the bracket,
First and second sidewalls are formed on the lower surface of the upper bracket along the longitudinal direction of the upper bracket,
First to third moving holes are formed in the front and rear portions of the side walls of the body and the first and second side walls of the upper bracket, respectively, through which the connecting shaft, the hinge shaft and the rotating shaft are respectively inserted,
Wherein the first through third moving balls are each formed into a long hole shape that is inclined along the moving direction of each axis so that each axis can move in the up-slide operation. A body formed in a hexahedron shape whose upper surface is opened,
A first adjusting lever part installed on one side of the body so as to be vertically rotatable and adjusting the height of the seat part,
A second adjusting lever part provided on the other side of the body so as to be rotatable in forward and backward directions,
A tilting adjuster for locking or releasing the tilting operation of the backrest and the seat in cooperation with the operation of the second adjusting lever,
A third adjusting lever portion provided on one side of the body so as to be rotatable in a vertical direction,
And a position adjusting unit coupled to the upper portion of the body so as to be slidable along the forward and backward directions and to adjust the position by moving the seat in the forward and backward directions,
A connection shaft, a hinge shaft and a rotation shaft are installed across both side walls of the body,
The bracket coupled to the hinge shaft and the rotary shaft is rotatable in the vertical direction about the rotary shaft,
An elastic member for providing a restoring force to the bracket is provided on an outer circumferential surface of the rotating shaft,
The upper bracket coupled to the connecting shaft, the hinge shaft, and the rotating shaft is formed in a rectangular plate shape, and the seat portion is slid upwards in the rearward direction during the rotation operation of the bracket,
First and second sidewalls are formed on the lower surface of the upper bracket along the longitudinal direction of the upper bracket,
First to third moving holes are formed in the front and rear portions of the side walls of the body and the first and second side walls of the upper bracket, respectively, through which the connecting shaft, the hinge shaft and the rotating shaft are respectively inserted,
Wherein the first through third moving balls are each formed into a long hole shape that is inclined along the moving direction of each axis so that each axis can move in the up-slide operation. delete 3. The seat according to claim 1 or 2, wherein the first adjustment lever portion
A first adjusting lever rotatably installed on one side of the body,
A first handle coupled to an outer end of the first control lever,
And a pressing piece integrally formed at an inner end of the first control lever and pressing the opening / closing pin provided at the upper end of the cylinder by rotation of the first control lever to release the locking. 3. The seat according to claim 1 or 2, wherein the second control lever portion
A second adjusting lever provided on one side of the body so as to be rotatable in forward and backward directions,
A second handle coupled to an outer end of the second control lever,
A rotation pin provided as a rotation center of the second control lever,
And a stopper for restricting a rotation angle of the second control lever during a rotation movement of the second control lever. 6. The apparatus of claim 5, wherein the tilting adjuster
A central wall disposed transversely to connect both side walls within the body,
A fixing piece movably installed on the center wall in the front and rear direction and fixing or releasing the front end of the bracket;
And a transmission link for transmitting the rotational force of the second control lever to a fixed piece,
Wherein the transmission link is rotated by rotation of the second control lever in a state where both ends of the transmission link are connected to the inner end of the second control lever and the fixing piece, thereby moving the fixing piece in the forward and backward directions. 3. The apparatus of claim 2, wherein the third control lever portion
A third adjusting lever rotatably installed on one side of the upper bracket,
A third handle coupled to an outer end of the third control lever,
And a restoring spring provided on an outer peripheral surface of an inner end of the third control lever and providing restoring force to the third control lever. 8. The apparatus of claim 7, wherein the position adjuster
A slide panel slidably coupled to the upper bracket along the front-rear direction,
A support member rotatably supporting an inner end of the third control lever,
A lock member coupled to an inner end of the third control lever and inserted in a plurality of control holes formed in the upper bracket to lock or unlock forward and backward movement of the slide panel,
And a return spring for providing restoring force to the slide panel. A multifunctional assembly as claimed in claim 1 or 2,
Wherein the multifunction assembly is used to adjust the height of the seat portion and the tilting angle of the backrest, to lock or release the tilting operation, and to slide the seat portion upward rearward when adjusting the tilting angle of the backrest .

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