KR20190036101A - Chair assembly for the lower limbs exercising apparatus - Google Patents

Abstract

The present invention relates to a chair for an undergarment exercising apparatus whose structure is improved so as to adjust a forward / backward movement and a height operation for adjusting a distance from a pedal provided on a casing main body side according to a physical condition of a user, Assembly.
The present invention provides a motorcycle comprising: a casing main body disposed on an upper end of a base member and having both side pedals rotatably; Left and right first support members, the lower ends of which are rotatably connected to the first hinge pin so as to be connected to the upper left and right sides of the base member; A second left and right second support members rotatably connected to the left and right sides of the base member at a position spaced apart from the left and right first support members so as to be rotatably connected to the first hinge pin at a lower end thereof; A support plate connected to each of the left and right first support members and the upper portions of the left and right second support members respectively by connecting pins and to which a seat portion of the chair is seated and coupled; And adjusting means for adjusting the height of the bed and the seat back and the forward and backward movements by adjusting the rotation angles of the left and right first and second receiving members with respect to the first and second hinge pins.

Description

{CHAIR ASSEMBLY FOR THE LOWER LIMBS EXERCISING APPARATUS}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a chair assembly for an undergarment exercise apparatus, and more particularly, to a chair assembly for an undergarment exercise apparatus, To a chair assembly for an underground exercise machine, the structure of which is improved.

A general upright and down-link motion device comprises a pair of pedals with feet on which the feet are seated and a pair of handles on which the hands can be gripped.

Therefore, when the user presses the force in a predetermined direction while holding both hands on the pedal and holding the handle with both hands, each of the pedals and the handle reciprocates along a predetermined trajectory while simultaneously moving the arms and the legs.

The exercise using the normal exercising apparatus separates the upper body or the lower body while the exercise of the upper and lower exercises simultaneously increases the amount of exercise by exercising the arms and legs as described above and also enables an effective whole body exercise.

Therefore, in recent years, attempts have been made to apply the body to the rehabilitation treatment of the incompetent person or the elderly person by using the above-mentioned upper and lower interlocking motion device.

However, the conventional upper and lower interlocking exercises are focused on increasing the amount of exercise for a healthy general person, and the pedal and the handle are configured to reciprocate with a simple straight or arc-shaped trajectory, so that the body part used for the exercise is limited There was a problem that was difficult to apply to rehabilitation therapy in which muscles of various regions were to be used.

As a prior art for improving this, a frame, as disclosed in Korean Registered Patent Publication No. 10-1115545, entitled " upper and lower interlocking exercise device for rehabilitation therapy "(registered on Feb. 26, 2012); A first shaft fixedly installed through the upper side of the frame; A second shaft installed to be rotatable through the frame; A pair of base links rotatably connected at both ends of the first shaft so that the pedals formed at the other end are rotatable along a trajectory of an arc; A pair of upper links, one end of which is connected to be linked with the lower link, and the other end of which is formed with a handle; And a pair of rotary members fixedly mounted on both ends of the second shaft and integrally rotating with the second shaft, wherein each of the rotary members includes an eccentric portion connected to the upper link and the second shaft pin at an eccentric position, Wherein the eccentric rotation link restricts a pivot range of the pedal of the base link so as to reciprocate within a predetermined section and causes the handle of the upper link to draw a closed curve locus according to a pivot motion of the base link, .

Another prior art related to the conventional non-rehabilitation apparatus is disclosed in Korean Registered Patent Publication No. 10-1494685 entitled " Lower Training Workout Organization "(Registered on Feb. 20, 2015). A driving shaft rotatably driven by a rotational driving force of a driving motor mounted on a connecting rod of the frame; A rotation shaft that is rotatably driven by receiving a rotational force of a drive shaft driven by the drive motor through a connecting means; A lower pedestal on which a user's lower limb is seated and forcibly moving the user's lower limb by the rotational force of the driving shaft and the rotary shaft; A plurality of first interlocking means for converting the rotational force of the drive shaft to a cranking force and transmitting the rotational force to the undercarriage; And a plurality of second interlocking means for transmitting the rotational force of the rotary shaft to the lower pedestal, wherein the first interlocking means comprises a rotary plate provided at both side end portions of the drive shaft, and one end portion connected to the edge of the rotary plate And the other end is connected to the lower pedestal and cranked by the rotational force of the driving shaft; a connecting bar connected to the upper end of the lower pedestal; and a support Wherein the second interlocking means comprises eccentric cams provided to be eccentrically rotated at both side ends of the rotary shaft, a transfer bar which contacts the periphery of the eccentric cam and transmits the eccentric rotational force of the eccentric cam, The turning operation of the bar is switched to the angle adjusting force of the lower pedestal and is transmitted to the supporting block It consists of a control panel.

However, the conventional upper and lower rehabilitation exercises have adopted a cycle exercise method in which the lower limb is cranked. However, since the function of adjusting the chair is not provided according to the user's body condition, It is necessary to adjust the user's interval and chair height.

Korean Registered Patent Publication No. 10-1115545 entitled " Upper and Lower Interlocking Exercise Device for Rehabilitation Therapy "(Registered on Feb. 26, 2012) Korean Registered Patent Publication No. 10-1494685 entitled "Lower limb training apparatus" (registered on Feb. 2015)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a method and apparatus for adjusting the distance between a pedal provided on a casing main body side and a pedal And to provide a chair assembly for an undergarment exerciser whose structure is improved so that the operation and the elevation operation are adjusted.

According to an aspect of the present invention, there is provided a motorcycle comprising: a casing body disposed on an upper end of a base member and having both side pedals rotatably; Left and right first support members, the lower ends of which are rotatably connected to the first hinge pin so as to be connected to the upper left and right sides of the base member; A second left and right second support members rotatably connected to the left and right sides of the base member at a position spaced apart from the left and right first support members so as to be rotatably connected to the first hinge pin at a lower end thereof; A support plate connected to each of the left and right first support members and the upper portions of the left and right second support members respectively by connecting pins and to which a seat portion of the chair is seated and coupled; And adjusting means for adjusting the height of the bed and the seat back and the forward and backward movement by adjusting the rotation angles of the left and right first and second receiving members with respect to the first and second hinge pins, do.

The adjustment means includes a first support ring fixed to the inside of the left and right first support members so as to be rotatably pin-coupled to the hollow and formed with a hollow portion, a large diameter portion which is coupled to penetrate through the hollow of the first support ring, A manipulation handle coupled to the manipulation handle by an assembly screw such that the manipulation handle is rotatably coupled to one end of the screw shaft; a manipulation handle interposed between the manipulation handle and one side of the first support ring, A second coupling ring arranged to be interposed between the other side of the first support ring and the step and coupled to penetrate the screw shaft, And a second fastening hole formed on the upper end of the second fastening hole so that the other end of the screw shaft is fastened to the upper end of the second fastening hole, Fixed configuration is immediately provided.

A first fixing pipe coupled to the outside of the first hinge pin and fixed to an upper side of the base member and connecting the left and right first supporting members, And a second fixing pipe fixed to the upper surface of the base member and connecting the left and right second supporting members.

And a connection bar for connecting the first fixing pipe and the fixing bar to reinforce the fixing bar.

The first and second supporting members on the left and right sides are tilted forward or backward with respect to the first and second hinge pins in the forward and backward movement of the screw shaft according to the rotation direction of the operation handle, It is possible to control the screw shaft to move backward so that the interval between the two pedals is longer than the distance between the two pedals and to adjust the screw shaft to move closer to the two pedals In addition, since the height of the seat portion of the chair is adjusted according to the inclination angle of the first and second right and left support members relative to the base member, there is an advantage that the convenience of the user can be increased.

Further, the present invention is characterized in that the adjustment means is fixed to the inner side of the left and right first support members, and has a first support ring having a first fastening hole having an female screw thread on its inner peripheral surface, and a second support ring fastened to the first fastening hole A screw shaft having a male screw thread formed on an outer circumferential surface so as to have an operation handle at one end thereof and a screw shaft extending upwardly from the base member between the left and right first support members and the left and right second support members, The first and second support rings are engaged with each other by the rotation of the screw shaft so that the first and second support rings are rotated in the forward and reverse directions while the first and second support rings are engaged, The tilt angle of the member can be easily adjusted and the lead dimension of the male screw thread formed on the screw shaft is selected so as to have the advantage of precisely adjusting the height of the seat portion and the distance from the pedal .

The first and second fixing tubes for supporting the first and second hinge pins and connecting the first and second supporting members to the left and right can be fixed to the upper surface of the base member by welding. The first and second supporting members can be reinforced while easily supporting the pin and connecting the left and right first and second supporting members rotatably with respect to the first and second hinge pins.

Further, since the connecting bar connecting the first fixing pipe and the fixing bar is provided, the present invention has an advantage that the fixing bar can be firmly reinforced.

1 is a front view of an undergarment exercise mechanism to which a chair assembly for an undergarment exercise apparatus according to the present invention is applied.
2 is an exploded perspective view of a chair assembly of the present invention.
3 is a plan view showing a schematic configuration of the chair assembly of the present invention.
4 is a perspective view showing the adjusting means of the present invention.
5 is an enlarged view of a screw shaft of the adjusting means of the present invention and an important part of the first supporting ring;
6 is a state of use in which the left and right first and second supporting members are inclined forward by the adjusting means of the present invention.
7 is a state of use in which the left and right first and second supporting members are vertically erected by the adjusting means of the present invention.
Fig. 8 is a state of use in which the left and right first and second supporting members are inclined rearward by the inventive adjustment means; Fig.
9 is a view schematically showing a gap difference and a height difference when the first right-side support member of the present invention is in the forward tilting, standing and backward tilting states.

1 to 9, a chair assembly 200 for a lower extremity exercise machine according to the present invention includes a casing body 200 disposed on the upper end of a base member 100 and having both side pedals 210 rotatable, ; Left and right first support members 310A and 310B, the lower end of which is rotatably connected to the upper left and right sides of the base member 100 by a first hinge pin 332; The lower end of the base member 100 is rotatably connected to the left and right sides of the base member 100 at the positions spaced from the left and right first support members 310A and 310B by the first hinge pin 332 Left and right second support members 320A and 320B; The first and second left and right first support members 310A and 310B and the upper portions of the left and right second support members 320A and 320B are connected by connection pins 342 and the chair seat 50 is seated on the upper side A combined receiving plate 350; And the left and right first and second supporting members 310A, 310B and 320A and 320B with respect to the first and second hinge pins 342 and 344, And adjusting means (400) for adjusting the height and the forward and backward movement of the vehicle.

1, both side pedals 210 are rotatably installed on both left and right sides of the casing main body 200, and a chair seat 50 is fixed to a base member 100 spaced from the casing main body 200 to the rear side, Is mounted on the upper side of the support plate 350.

The casing main body 200 is provided with a pedal movement supporting mechanism (not shown) to support the crank rotation of the pedal 210.

The left and right first support members 310A and 310B are symmetrical to each other on the left and right sides of the base member 100 with respect to the base member 100, Are formed in the shape of a square pipe.

The left and right second support members 320A and 320B have the same structure as that of the left and right first support members 310A and 310B and are symmetrical to each other on the left and right sides with respect to the base member 100 And the intermediate portion except for the upper end portion and the lower end portion of the circular arc shape is formed in the shape of a square pipe.

The support plate 350 is coupled to connect the left and right first support members 310A and 310B and the upper portions of the left and right second support members 320A and 320B and the left and right first support members 310A and 310B And the upper portions of the left and right second support members 320A and 320B are connected to the connection pin 342. [

A plurality of coupling holes 352 are formed in the support plate 350 so that coupling members such as bolts, screws, and the like are fastened to the chair seat portion 50.

Referring to FIGS. 2 and 4, the adjusting means 400 includes a first support ring 420 formed to be rotatably pin-coupled to the left and right first support members 310A and 310B, And a large diameter portion 432 coupled to the hollow of the first support ring 420 and having a step 434 on an outer circumferential surface thereof and a screw shaft 430 having a male screw thread formed on an outer circumferential surface of the large diameter portion 432, An operation handle 435 coupled to the one end of the screw shaft by an assembly screw 436 to be rotated together with one end of the screw shaft and an operation handle 435 interposed between one side of the first support ring 420 and the operation handle 435, A first coupling ring 450 coupled to one end of the first support ring 420 so as to penetrate one end of the first support ring 420 and a second coupling ring 450 interposed between the other side of the first support ring 420 and the step 434, A second coupling ring 460 coupled to the left and right first support members 310A and 310B and a pair of left and right first support members 310A and 310B and left and right second support members 320A and 320B Is configured to extend upwardly the upper end to the base member 100 to the second support ring fixed bars 440, 445 is provided with the other end formed with a second coupling hole (445a) so that tightening of the screw shaft 430.

5, the screw shaft 430 includes a small diameter portion 433 formed at one end portion thereof, a large diameter portion 432 formed at the other end portion and having a diameter larger than that of the small diameter portion 433, And a step 434 formed at a boundary portion between the large diameter portion 432 and the large diameter portion 432.

The first and second coupling rings 450 and 460 may have diameters of the first and second coupling rings 450 and 450 so as to transmit the forward and backward movement forces to the first support ring 420 side during forward and backward movement of the screw shaft 430. [ Is larger than the hollow inner diameter of the first support ring (420).

The second coupling ring 460 is supported on the other side by the step 434 so that the backward movement of the screw shaft 430 is transmitted through the step 434 to move the first support ring 420 backward Function.

The second support ring 445 is accommodated in a support bracket 442 provided on the left and right sides of the upper portion of the fixing bar 440 and the end of the support pin 447 passing through the support bracket 442 2 supporting rings 445, and is pin-coupled.

The support pin 447 is threaded in a part of the outer circumferential surface so as to be fastened to the nut member 446 provided on the outer side of the support bracket 442. On the other hand, As shown in FIG.

Referring to FIG. 3, the first support ring 420 is an annular structure having a hollow at its center. The first support ring 420 is fixed to both sides of the outer circumference of the first bracket 310 And the end of the fixing pin 415 penetrating through the fixing pin 415 is pin-coupled and rotatable.

The fixing pin 415 is provided with a spacer member 417 in the form of a nut between the fixing bracket 410 and the first supporting ring 420 and is threaded on a part of the outer circumferential surface of the spacer member 417 And a portion of the first support ring 420 that is to be coupled to the outer periphery of the first support ring 420 is formed into a round bar structure of a tamper-proof type.

The screw shaft 430 has a structure in which the screw shaft 430 is inserted into the second support ring 445 in such a manner that the other end of the screw shaft 430 is threadedly engaged with the first support ring 420.

The spacer member 417 and the nut member 446 function to prevent the detachment of the fixing pin 415 and the support pin 447.

The operation handle 435 has a structure in which the handle 437 is projected so that the user can easily grasp it.

The lower portion of the fixing bar 440 is fixed to the upper surface of the base member 100 by welding or the like and is screwed to the inner circumferential surface of the second fastening hole 445a of the second supporting ring 445 provided on the upper side, 430 having a male screw thread corresponding to a male screw thread.

 The first fixing pipe (310A, 310B) is coupled to the outer side of the first hinge pin (332) and is fixed to the upper surface of the base member (100) and connects the left and right first supporting members And a second fixing pipe 320 which is coupled to the outer side of the second hinge pin 334 and is fixed to the upper surface of the base member 100 and connects the left and right second supporting members 320A and 320B, (520).

The first and second fixing pipes 510 and 520 may be welded to the upper surface of the base member 100.

The fixing bar 440 may further include a connecting bar 530 which is connected to one end of the first fixing pipe 510 to be fixed to the fixing bar 440 and the other end of which is fixed to the fixing bar 440.

According to the present invention having such a configuration, the user manipulates the operation handle 435 in a state in which the user grips the knob 437 to adjust the spacing between the pedals 210 and the height of the chair seat 50, The screw shaft 430 connected to the manipulation handle 435 is rotated forward while being coupled to the second support ring 445 as shown in FIG. The first support ring 420 is advanced by the operation handle 435 which is moved together with the first support ring 420 interlocked with the first support ring 420 via the first engagement ring 450 so that the forward operation force is transmitted to the first support ring 420 side, The forward movement of the first support ring 420 is transmitted to the left and right first support members 310A and 310B through the fixing bracket 410 and the fixing pin 415. Therefore, The first supporting members 310A and 310B and the left and right second supporting members 320A and 320B are disposed on the front side of the casing body 200 with respect to the first and second hinge pins 342 and 344 The distance between the chair seat 50 and the pedals 210 is narrowed and the height of the chair seat 50 is lowered.

At this time, since the second support ring 445 is fixed to the fixing bar 440, the screw shaft 430 which is operated forward is moved forward through the second support ring 445, The first support ring 420 is interlocked with the screw shaft 430 in accordance with the forward movement of the screw shaft 430 by the operation handle 435 and the first engagement ring 450, The forward force of the screw shaft 430 is shifted to the left and the right in the structure of the first support ring 420 having the fixing pin 415 penetrating through the fixing bracket 410 extending from the inside of the receiving members 310A and 310B, The first and second right and left second supporting members 320A and 320B transmit the right and left first supporting members 310A and 310B to the front side with respect to the first hinge pin 332, 310B such as the left and right first supporting members 310A, 310B with respect to the second hinge pin 334 because the first supporting members 310A, 310B are connected to the left and right first supporting members 310A, It is.

As a result, the gap between the first support ring 420 and the second support ring 445 becomes narrow and the first and second left and right support members 310A, 310B, 320A, and 320B are tilted forward.

At this time, as the distance between the first and second support rings 420 and 445 becomes narrower, the first support ring 420 is rotatably coupled to the pin-fixing pin 415, The first support ring 420 is rotated.

7, when the operation handle 435 is rotated in the other direction, the screw shaft 430 connected to the operation handle 435 is engaged with the second support ring 445 in the other direction The first support ring 420 is interlocked by the second engagement ring 460 which is supported by the step 434 of the screw shaft 430 and is interlocked and retracted in the backward movement of the screw shaft 430, The backward movement of the first support ring 420 is transmitted to the left and right first support members 310A and 310B through the fixing bracket 410 and the fixing pin 415, The left and right first side support members 310A and 310B are erected so that the left and right first side support members 310A and 310B are vertically erected with respect to the first hinge pin 332 and the left and right second side support members 320A and 320B, Two hinge pins 334 as a reference.

Accordingly, the left and right first supporting members 310A and 310B and the left and right second supporting members 320A and 320B, which have been tilted forward with respect to the first and second hinge pins 342 and 344, The distance between the seat 50 and the two pedals 210 is increased and the seat 100 stands upright at a right angle with respect to the base member 100 and the chair seat 100 50 is higher than the height of the chair seat 50 in a forwardly inclined state.

8, the screw shaft 430 connected to the manipulating handle 435 is rotated in the second supporting ring 445, as shown in Fig. 8, The first support ring 420 rotates in the opposite direction while being rotated in the opposite direction and the first support ring 420 is coupled to the reference hinge pin 332 as the screw shaft 430 is interlocked with the screw shaft 430 via the second engagement ring 460, The left and right first support members 310A and 310B are inclined rearward and the left and right second support members 320A and 320B connected to each other through the support plate 350 are connected to the rear hinge pin 334 with reference to the second hinge pin 334, The left and right first supporting members 310A and 310B and the left and right first supporting members 310A and 310B and the left and right first supporting members 310A and 310B are positioned at a right angle with respect to the base member 100 described above with respect to the first and second hinge pins 342 and 344, The second supporting members 320A and 320B are rotated to the rear side so that the spacing between the chair seat 50 and the pedals 210 is distanced, Chair than the height of the chair seat portion 50 of the upright at right angles to, the greater the height of the seat portion (50).

At this time, the screw shaft 430, which is operated to be retreated, is rotated backward from the second support ring 445 fixed by the fixing bar 440, The ring 420 is moved away from the second support ring 445 to tilt the left and right first and second support members 310A, 310B, 320A, and 320B backward.

That is, as shown in FIG. 8, the chair seat portion 50 of the present invention is configured such that the right and left first and second supporting members 310A, 310B, 320A, The first and second supporting members 310A, 310B, 320A, and 320B have a height difference t1 at which the height of the chair seat 50 is lowered when the seat is tilted forward or backward, The front and rear moving distance differences L1 and L2 are generated according to the angle and the distance between the pedal 210 and the chair side 50 becomes closer to the front side of the chair 50. On the other hand, The distance between the two pedals 210 becomes longer.

The first and second supporting members 310A, 310B, 320A, and 320B on the left and right sides of the screw shaft 430 according to the rotation direction of the operation handle 435 are moved in the forward and backward directions, A user who has a relatively long base length may be provided with a screw shaft 430 so as to be spaced apart from the side pedals 210 according to the user's body conditions, The user can adjust the height of the chair seat 50 by moving the screw shaft 430 forward and backward with a distance between the pedals 210 and the base member The first and second supporting members 310A, 310B, 320A and 320B with respect to the left and right first and second supporting members 310 and 320. Therefore, the convenience of the user can be improved.

In the present invention, as the adjusting means 400 is operated in the forward and reverse directions while being screwed to the second support ring 445 by the screw shaft 430 in one direction and the other rotation direction, The angle of inclination of the members 310A and 310B 320A and 320B can be easily adjusted and the height of the chair seat 50 and the height of the pedal 210 can be adjusted by suitably selecting the lead dimension of the male screw thread formed on the screw shaft 430. [ Can be precisely controlled.

The first and second fixing pipes 510 and 520, which support the first and second hinge pins 342 and 344 and connect the left and right first and second supporting members 310A and 310B and 320A and 320B, The first and second supporting members 310A, 310B, 320A, and 320B can be fixed to the first and second supporting members 310a, 310b, 320a, The first and second support members 310A, 310B, 320A, and 320B can be reinforced while being rotatably connected to the two hinge pins 342 and 344.

In addition, since the connecting bar 530 connecting the first fixing pipe 510 and the fixing bar 440 is provided, the fixing bar 440 can be firmly reinforced.

Although the present invention has been described in detail with reference to specific embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the appended claims, as well as the appended claims.

That is, the present invention described above is not limited to the above-described specific preferred embodiments, and any person skilled in the art will be allowed to use the present invention without departing from the gist of the present invention. It will be understood that various modifications can be made without departing from the spirit and scope of the invention as defined in the appended claims.

50: chair seat 100: base member
200: casing main body 210: pedal
310A, 310B: Left and right first supporting members 320A, 320B: Left and right second supporting members
332: first hinge pin 334: second hinge pin
342: connecting pin 350:
400: adjusting means 410: fixed bracket
415: fixing pin 420: first supporting ring
430: screw shaft 432:
433: small diameter portion 434:
435: Operation handle 436: Assembly screw
437: handle 440: fixed bar
442: support bracket 445: second support ring
445a: second fastening hole 446: nut member
447: Support pin 450: First coupling ring
460: second coupling ring 510: first fixing pipe
520: second fixing pipe 530: connecting bar

Claims (4)

A casing body 200 disposed on the top of the base member 100 and having both side pedals 210 rotatable;
Left and right first support members 310A and 310B, the lower end of which is rotatably connected to the upper left and right sides of the base member 100 by a first hinge pin 332;
The lower end of the base member 100 is rotatably connected to the left and right sides of the base member 100 at the positions spaced from the left and right first support members 310A and 310B by the first hinge pin 332 Left and right second support members 320A and 320B;
The first and second left and right first support members 310A and 310B and the upper portions of the left and right second support members 320A and 320B are connected by connection pins 342 and the chair seat 50 is seated on the upper side A combined receiving plate 350; And
The rotation angle of the left and right first and second supporting members 310A and 310B and the left and right first supporting members 310A and 310B and the left and right first supporting members 310A and 310B and 320A and 320B with respect to the first and second hinge pins 342 and 344, And adjusting means (400) for adjusting the height, front and back movement of the chair assembly. The method according to claim 1,
The adjustment means 400 includes a first support ring 420 having a hollow shape fixed to the inside of the left and right first support members 310A and 310B so as to be rotatably pinned,
A screw shaft 430 having a large diameter portion 432 coupled to the hollow of the first support ring 420 and having a step 434 on an outer circumferential surface thereof and having a male screw thread formed on an outer circumferential surface of the large diameter portion 432,
An operation handle 435 coupled to the one end of the screw shaft 430 by an assembly screw 436 so as to be rotated together,
A first coupling ring 450 interposed between one side of the first support ring 420 and the manipulation handle 435 and coupled to one end of the screw shaft 430 to be inserted therethrough,
A second coupling ring 460 interposed between the other side of the first support ring 420 and the step 434 and coupled to penetrate the screw shaft 430,
The other end of the screw shaft 430 is connected to the upper end of the base member 100 between the left and right first support members 310A and 310B and the left and right second support members 320A and 320B, And a fixing bar (440) provided with a second supporting ring (445) having a second fastening hole (445a) formed therein. The method according to claim 1,
A first fixing pipe 510 coupled to the outside of the first hinge pin 332 and fixed to the upper surface of the base member 100 and connecting the left and right first supporting members 310A and 310B, ,
A second fixing pipe 520 which is coupled to the outside of the second hinge pin 334 and is fixed to the upper surface of the base member 100 and connects the left and right second supporting members 320A and 320B, Wherein the chair assembly comprises: The method of claim 3,
Further comprising a connecting bar (530) connecting the first fixing pipe (510) and the fixing bar (440) to reinforce the fixing bar (440).

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