CN113208337A

CN113208337A - Connecting base of swivel chair

Info

Publication number: CN113208337A
Application number: CN202110444026.5A
Authority: CN
Inventors: 邓丹; 欧阳钟明
Original assignee: Beijing Youjin Furniture Co ltd
Current assignee: Beijing Youjin Furniture Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-08-06
Anticipated expiration: 2041-04-23
Also published as: CN113208337B

Abstract

The utility model relates to a connection base of swivel chair in seat field, it is including being used for and supporting the base box that the gas pole pegged graft each other, the last fixed surface of base box has a spacing axle, the top of base box still be provided with one with seat support interconnect's supporting baseplate, the supporting baseplate uses spacing axle to rotate with the base box as the axle and is connected, still be provided with one between supporting baseplate and the base box and be used for driving the seat support and rotate the elasticity return piece of return, the one end and the base box screens of elasticity return piece are fixed, the other end and the supporting baseplate screens of elasticity return piece are fixed. The chair reduces the risk of collision between the backrest and the edge of the table top, and through rotation of the chair seat, personnel can lean the two side areas of the waist on the backrest, so that fatigue of the waist side area is relieved, and the lower body area can be moved independently through rotation of the chair seat without influencing normal work of the personnel; due to the arrangement of the elastic return piece, the chair seat can be automatically returned after rotating, and the integrity of the swivel chair is increased.

Description

Connecting base of swivel chair

Technical Field

The application relates to the field of seats, in particular to a connecting base of a swivel chair.

Background

The swivel chair is one of computer chair, office chair and negotiation chair, and is a chair with a rotatable sitting part. The swivel chairs can be divided into two types of half swivel chairs and full swivel chairs.

The swivel chair commonly seen in our life generally comprises a claw disc for supporting the ground, a supporting air rod fixed on the claw disc, a chair seat arranged on the supporting air rod, a connecting base fixed below the chair seat and used for being connected with the supporting air rod, a backrest connected with the connecting base, and supporting armrests fixed with the connecting base.

Seat support and back are reciprocal anchorage, the in-process of personnel's official working before the table, if personnel need rotate the swivel chair and talk, or rotate the swivel chair article of taking, the rotation of seat support can drive the back in step and rotate, very easily cause colliding with at back edge and desktop edge, if netting the swivel chair, the marginal zone of back is mostly the fixed area of netting, the damage that very easily causes netting of back and desktop edge or the stability of fixing between influence netting and the back, thereby influence the life of swivel chair.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a connecting base of a swivel chair, which has the advantages that a chair seat can freely rotate relative to a backrest, the rotation of the swivel chair can be reduced while the activity space of a human body is not reduced, unnecessary space collision is reduced, and the service life of the swivel chair is prolonged.

The application provides a connecting base of swivel chair adopts following technical scheme:

the utility model provides a connection base of swivel chair, including the base box that is used for and supports the mutual grafting of gas pole, the last fixed surface of base box has a spacing axle, the top of base box still is provided with one with seat support interconnect's supporting baseplate, supporting baseplate uses spacing axle to rotate with the base box as the axle and is connected, still be provided with one between supporting baseplate and the base box and be used for driving the seat support and rotate the elasticity piece that returns of return, the one end and the base box screens of elasticity piece are fixed, the other end and the supporting baseplate screens of elasticity piece that returns are fixed.

Through adopting above-mentioned technical scheme, when personnel sat on the seat support, if personnel need rotate the health, the orientation of accessible support handrail control swivel chair is motionless, the rotation of rethread waist to drive the relative rotation of supporting baseplate and base box, and then realize the rotation of seat support, at this in-process, reduced the whole rotation of swivel chair and taken up the space, also make the back be in the back of health always, reduced the risk that back and desktop edge collided with. Due to the arrangement of the elastic return piece, the chair seat can be automatically returned after rotating, and the integrity of the swivel chair is increased. Personnel do on the seat support for a long time, and the waist region keeps fixed posture very easy ache with the shank region for a long time, and personnel need not the accuse handrail, only need the independent rotation through the seat support for personnel can keep personnel's upper part of the body operating condition to carry out reciprocal the twisting to shank and waist, and have carried out the reliving to the waist, have alleviated the pain of waist and shank. Because the seat support is movable, personnel are when turning round the body, drive the seat support very easily and are connected the rotation between the base for the upper part of the body region has obtained the extension, and the most region in back can both contact on the back in, has increased the area of contact of back and back, and the health also can the side direction support on the back, makes human activity light more nimble, also makes the health obtain better extension.

Preferably, the base box is detachably connected with a connecting seat, and the limiting shaft is fixedly connected to one side of the connecting seat, which is away from the base box.

Through adopting above-mentioned technical scheme, the connecting seat has increased the area of contact of spacing axle with the base box for spacing axle during operation is more stable, because the connecting seat can be dismantled with the base box and be connected, if damage appears in spacing axle, also be convenient for the staff changes the connecting seat, thereby has reduced the material waste.

Preferably, the elastic return piece is a first torsion spring, one side of the connecting seat fixing the limiting shaft is connected with a first clamping block used for limiting initial positions of two ends of the first torsion spring, and one side of the supporting bottom plate facing the base box is convexly provided with a second clamping block used for driving one end of the first torsion spring to move so as to enable the first torsion spring to be elastically deformed.

Through adopting the above technical scheme, first torsion spring structure is small and exquisite, the space occupies limitedly, use with spacing axle cooperation, the inside space of base is connected in utilization that can be reasonable, one side at first screens piece is established to the one end card of first torsion spring, one side at the second screens piece is established to the other end card of first torsion spring, rotation through supporting baseplate, thereby drive the elastic energy storage of first torsion spring, make supporting baseplate take place to have the effort of return after rotating, be favorable to the playback of seat support, also make the seat support can not easy emergence rotation, thereby influence the travelling comfort of personnel's position of sitting state.

Preferably, the upper surface of the base box is embedded with a plurality of balls for supporting the supporting bottom plate by taking the limiting shaft as a shaft, and the balls are in rolling connection with the base box.

Through adopting above-mentioned technical scheme, the setting of ball has played the supporting role to the supporting baseplate on the one hand, and on the other hand has reduced the relative pivoted frictional force of supporting baseplate and base box, has reduced supporting baseplate rotation in-process unnecessary and has rotated wearing and tearing.

Preferably, a track for sliding the ball is arranged at a position, corresponding to the ball, on the support bottom plate.

Through adopting above-mentioned technical scheme, orbital setting has increased the area of contact between ball and the supporting baseplate for supporting baseplate atress is more even, also makes to rotate more stable between supporting baseplate and the base box.

Preferably, one side of the connecting seat, which is fixed with the limiting shaft, is fixed with a limiting projection, one side of the supporting base plate, which faces the base box, is fixedly connected with two stop blocks used for limiting the maximum rotating angle of the supporting base plate, the two stop blocks are located on two sides of the limiting projection, and the limiting projection is located on a rotating path of the two stop blocks.

Through adopting above-mentioned technical scheme, because the both sides of seat support are provided with the support handrail, if the seat support sets up to the free rotation, cause the colliding with of shank and support handrail easily, but also easy because the unstable potential safety hazard that leads to the seat support to rotate excessively of health focus.

Preferably, a plurality of position-stabilizing supporting blocks are fixedly connected to the circumferential surface of the limiting shaft, and the position-stabilizing supporting blocks are located in the first torsion spring.

Through adopting above-mentioned technical scheme, first torsional spring is pressed close to more to the steady supporting shoe, has played limiting displacement to the work of first torsional spring, has ensured the stability of first torsional spring shrink in-process.

Preferably, the support bottom plate is internally provided with a positioning hole for accommodating the limiting shaft to pass through, and the height of the stable support block is lower than the height of the end face of the limiting shaft.

Through adopting above-mentioned technical scheme, the steady supporting shoe has still played the auxiliary stay effect to the supporting baseplate for the supporting baseplate atress is more stable.

Preferably, be provided with the locking mechanism that restriction supporting baseplate and base box rotated relatively in the base box, locking mechanism includes the limiting plate of being connected with the inner wall of base box slides, and the limiting plate pierces through base box upper surface and supporting baseplate simultaneously, and limiting plate one side is provided with rotates to be connected and drives the limiting plate and break away from the gyration dish to the supporting baseplate screens with the inner wall of base box, still is provided with in the base box and drives the limiting plate return to establish the second torsional spring of position to the supporting baseplate card, and the one end and the base box of second torsional spring are fixed, and the other end and the limiting plate of second torsional spring are fixed.

Through adopting above-mentioned technical scheme, the limiting plate blocks simultaneously and establishes in base box and supporting baseplate to restricted the relative rotation between supporting baseplate and the base box, makeed personnel according to the operating condition of the demand adjustment swivel chair of oneself, locking mechanism simple structure moreover, it is convenient to maintain.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the pressure of the waist is relieved, and the waist can be rotated when the supporting armrests and the backrest do not rotate due to the relative rotation of the supporting bottom plate and the base box, so that the muscles of the waist are relieved;

2. the rotary chair has the advantages that the collision of the rotary chair is reduced, the supporting base plate and the base box rotate relatively, so that the whole rotary displacement of the rotary chair is reduced, the collision of the backrest and the table edge is reduced, and even if the collision occurs, the impact force of the backrest on the table edge can be reduced due to the rotation of the supporting base plate, so that the rotary chair is not easy to wear;

3. make the health activity more nimble, because the free rotation of seat support for personnel when wrench movement, drive the relative rotation between seat support and the connection base very easily, thereby increased the activity space of upper part of the body, the regional also side direction of upper part of the body relies on the back, thereby makes the more releiving of health.

Drawings

FIG. 1 is a schematic view showing the overall structure of a swivel chair;

FIG. 2 is a schematic view showing the overall structure of the connection base;

FIG. 3 is an exploded view of a coupling structure embodying a coupling base and a support base;

FIG. 4 is a schematic view showing a structure of the connecting socket;

FIG. 5 is a schematic structural view showing a support base;

FIG. 6 is a schematic view showing the internal structure of the base case;

FIG. 7 is an enlarged view of detail A of FIG. 6, showing the structure of the locking mechanism;

fig. 8 is a side view embodying a locking mechanism.

Description of reference numerals: 11. a claw disk; 12. a universal wheel; 13. supporting the gas rod; 14. a chair seat; 15. a support arm rest; 16. a backrest; 2. connecting a base; 21. a base case; 211. a groove; 22. a control lever; 23. positioning the shaft sleeve; 24. pressing a plate; 25. a cushion pad; 26. a ring groove; 27. a ring plate; 271. a limiting hole; 3. a support base plate; 31. aligning holes; 32. a second bit block; 33. a stop block; 34. a track; 35. perforating; 4. a connecting seat; 41. a limiting shaft; 42. a first bit block; 43. a steady supporting block; 44. a limiting bump; 5. a first torsion spring; 6. a ball bearing; 7. a connecting plate; 71. a chute; 8. a locking mechanism; 81. a limiting plate; 811. a mating hook; 82. fixing the bolt; 83. a rotary disk; 831. a convex hook; 832. a mating groove; 9. a drive mechanism; 91. a support bracket; 92. a drive arm; 93. a handle; 94. a pull wire; 95. a clamping block; 96. a second torsion spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

A connecting base of a swivel chair is arranged on the swivel chair, as shown in figure 1, the swivel chair comprises a claw disc 11 for supporting the ground, and each end part of the claw disc 11 is rotatably connected with a universal wheel 12; a supporting air rod 13 is vertically inserted on the claw disc 11; a seat 14 is horizontally arranged above the supporting air rod 13, the connecting base 2 is fixed on the lower surface of the seat 14, and the end part of the supporting air rod 13 is fixedly inserted into the connecting base 2. A backrest 16 and two supporting armrests 15 are fixed on the connecting base 2, and the supporting armrests 15 are respectively positioned at two sides of the seat 14.

As shown in fig. 1 and 2, the connection base 2 includes a base case 21 horizontally disposed, the support arm rests 15 are fixed to both sides of the base case 21, and a support base plate 3 for interconnecting the seat 14 is horizontally disposed on an upper surface of the base case 21.

As shown in fig. 3, a circular groove 211 is pressed on the upper surface of the base box 21, a positioning shaft sleeve 23 is fixed on the upper surface of the groove 211, the positioning shaft sleeve 23 and the groove 211 are coaxially arranged, a circular connecting seat 4 is further arranged in the groove 211, the connecting seat 4 is simultaneously sleeved on the positioning shaft sleeve 23, and the connecting seat 4 is fixed on the bottom wall of the groove 211 through a bolt. A tubular limiting shaft 41 is coaxially and fixedly connected to the upper surface of the connecting seat 4, the limiting shaft 41 is sleeved on the positioning shaft sleeve 23 in the middle, and the supporting bottom plate 3 is provided with a positioning hole 31 with the same size as the limiting shaft 41. When the supporting bottom plate 3 is placed on the base box 21, the limiting shaft 41 penetrates out of the alignment hole 31, the pressing plate 24 for pressing the supporting bottom plate 3 is further arranged on the limiting shaft 41, a bolt penetrates through the pressing plate 24, the supporting bottom plate 3 and the positioning shaft sleeve 23, the bolt sequentially penetrates through the pressing plate 24, the supporting bottom plate 3 and the positioning shaft sleeve 23, and a nut is connected to the end portion of the bolt in a threaded mode, so that the supporting bottom plate 3 is connected with the base box 21 in a rotating mode under the limitation of the positioning shaft sleeve 23. In order to reduce the rotational wear between the pressing plate 24 and the supporting base plate 3, a cushion pad 25 made of foam is further sandwiched between the supporting base plate 3 and the pressing plate 24, so that the wear between the supporting base plate 3 and the pressing plate 24 is reduced, and the noise generated in the rotating process is also reduced.

As shown in fig. 4 and 5, the connecting seat 4 is further provided with an elastic return member, in the embodiment, the elastic return member adopts a first torsion spring 5, and the first torsion spring 5 is sleeved on the limiting shaft 41. The edge of the upper surface of the connecting seat 4 is further fixedly connected with a first clamping block 42, and two ends of the first torsion spring 5 extend towards the first clamping block 42 and are clamped at two sides of the first clamping block 42. A second locking block 32 is further fixed on one side of the supporting bottom plate 3 facing the connecting seat 4. When the supporting base plate 3 and the base box 21 are installed to each other and located at the initial position, the second locking block 32 is locked between the two ends of the first torsion spring 5, if the supporting base plate 3 and the base box 21 rotate relatively, the second locking block 32 abuts against one end of the first torsion spring 5 and drives the first torsion spring 5 to elastically deform, and the other end of the first torsion spring 5 abuts against the other end of the first locking block 42 so as to limit the free rotation of the first torsion spring 5.

When a person sits on the swivel chair for a long time, the waist is continuously kept in the same posture to cause ache, the person can keep the working state of the upper body, the movement of the legs drives the rotation of the waist, so that the relative rotation between the chair seat 14 and the base box 21 is driven, the waist and the leg areas are moved, and the pressure of the waist is relieved. And as the angle of rotation of the seat 14 is larger, the elastic deformation of the first torsion spring 5 is increased, so that the seat 14 can actively return to the initial position under the elastic action of the first torsion spring 5. And the seat 14 is not easy to rotate by too large angle, which causes potential safety hazard to human body. When personnel rotated or took article in the equidirectional, because the relative rotation between seat support 14 and the base box 21 for personnel drive seat support 14 pivoted in, reduced back 16 and followed the pivoted trend, make back 16 be difficult for colliding with the border at the desktop, thereby reduced back 16's wearing and tearing, indirectly improved the life of swivel chair. Moreover, the movement space of the upper body is greatly increased by the rotation of the chair seat 14, so that the movement of the upper body is more flexible, and the side areas can be supported on the backrest 16 by the human body, thereby relaxing the pressure of different areas of the upper body and relaxing the body.

As shown in fig. 4 and 5, the circumferential surface of the limiting shaft 41 is further integrally provided with 4 position-stabilizing support blocks 43, and edges of the position-stabilizing support blocks 43 are closer to the inner ring of the first torsion spring 5, so that the movement space of the first torsion spring 5 on the circumferential side of the limiting shaft 41 is limited, and the stability of the first torsion spring 5 during operation is improved. And the height of steady position supporting shoe 43 is less than the terminal surface height of spacing axle 41 for after supporting baseplate 3 and base box 21 were installed each other, supporting baseplate 3 was located the edge of counterpoint hole 31 and can be supported on steady position supporting shoe 43, thereby makes supporting baseplate 3 atress more balanced.

As shown in fig. 4 and 5, the rotation angle of the seat 14 is too large, which may cause the collision between the legs and the supporting armrests 15, and even when the center of gravity of the body is unstable, the rotation angle of the seat 14 is too large, which may cause the strain of the waist, in order to solve the above problem, a limiting protrusion 44 is further fixedly connected to the upper surface of the connecting base 4, and the limiting protrusion 44 is located on the extension line of the connection line of the first clamping block 42 and the limiting shaft 41. One side of the supporting base plate 3 facing the connecting seat 4 is fixedly connected with two stop blocks 33, and the two stop blocks 33 are located at two sides of the limiting convex block 44. When the support base plate 3 and the base box 21 rotate relatively, the limit projection 44 interferes with the moving paths of the two stop blocks 33, so that the maximum rotation angle of the support base plate 3 in two directions is limited.

As shown in fig. 3 and 5, an annular groove 26 is coaxially disposed on the upper surface of the base box 21 and located at the periphery of the groove 211, a plurality of balls 6 (in this embodiment, 8 balls 6 are taken as an example) are disposed in the annular groove 26, and the balls 6 are uniformly distributed at the periphery of the groove 211 by taking the limiting shaft 41 as an axis. And a circular track 34 for accommodating the ball 6 is opened at one side of the supporting base plate 3 facing the base box 21. When the support base plate 3 is fixed to the base box 21, each ball 6 is supported in the rail 34, thereby reducing the friction force between the support base plate 3 and the base box 21, and making the rotation of the support base plate 3 smoother. In order to keep the distance between the balls 6, a ring plate 27 is further arranged in the

ring groove

26, and 8 limiting holes 271 used for limiting the balls 6 are uniformly formed in the ring plate 27, so that the balls 6 are kept equidistant in the sliding process with the inner wall of the ring groove 26, and the stress stability of each ball 6 is guaranteed.

As shown in fig. 6 and 7, a locking mechanism 8 for limiting the relative rotation between the support base plate 3 and the base box 21 is further provided in the base box 21. A connecting plate 7 is vertically fixed in the base box 21, the locking mechanism 8 includes a limiting plate 81 disposed on one side of the connecting plate 7, a sliding groove 71 is vertically disposed on the connecting plate 7 at a position corresponding to the limiting plate 81, a fixing bolt 82 is connected to the limiting plate 81, and the fixing bolt 82 is disposed in the sliding groove 71, so that a sliding path of the limiting plate 81 is limited.

As shown in fig. 7 and 8, a rotary disc 83 is further disposed on one side of the connection plate 7 located on the retainer plate 81, the rotary disc 83 is rotatably connected to the connection plate 7, a protruding hook 831 is integrally formed on the edge of the rotary disc 83, a mating hook 811 engaged with the protruding hook 831 is disposed on the bottom of the retainer plate 81, and a driving mechanism 9 for driving the rotary disc 83 to rotate is further disposed on one side of the connection plate 7.

As shown in fig. 7 and 8, the driving mechanism 9 includes a supporting bracket 91 horizontally fixed on one side of the connecting plate 7, a driving arm 92 is disposed in the supporting bracket 91, the driving arm 92 is connected with the supporting bracket 91 in a sliding manner, a holding handle 93 is fixed on one side of the driving arm 92 away from the rotating disk 83, a pulling wire 94 is fixed at the other end of the driving arm 92, a block 95 is fixed at the end of the pulling wire 94, and a matching groove 832 for the block 95 to be clamped is formed on the upper edge of the rotating disk 83. A second torsion spring 96 is further arranged on the connecting plate 7, one end of the second torsion spring 96 is fixed on the connecting plate 7, and the other end of the second torsion spring 96 is clamped on the limiting plate 81. The fixing bolt 82 is clamped at the upper edge of the sliding slot 71 under the elastic force of the second torsion spring 96, and the retainer plate 81 simultaneously penetrates through the upper surface of the base box 21 and the supporting base plate 3, and the supporting base plate 3 is provided with a through hole 35 (as shown in fig. 5) for accommodating the retainer plate 81 to penetrate through. When the limiting plate 81 penetrates through the base box 21 and the supporting bottom plate 3 at the same time, the relative rotation of the base box 21 and the supporting bottom plate 3 is limited, so that the backrest 16 is driven to rotate along with the rotation of the seat 14 in the rotating process; if a person needs to use the seat 14 to rotate independently, the driving arm 92 can be pulled in a direction away from the rotating disc 83, the driving arm 92 drives the rotating disc 83 to rotate through the pull wire 94 and the fixture block 95, and drives the limiting plate 81 to move in a vertical direction under the limiting position of the base box 21 through the convex hook 831 and the matching hook 811, so that the limiting plate 81 is separated from the position where the supporting bottom plate 3 is perforated 35, and the free rotation of the supporting bottom plate 3 and the base box 21 is realized.

The implementation principle of the connection base of the swivel chair in the embodiment of the application is as follows: when the connection base 2 is spliced, the connection base 4 is fixed in the groove 211 of the base box 21 through screws, then the first torsion spring 5 is sleeved on the limiting shaft 41 of the connection base 4, two ends of the first torsion spring 5 are arranged on two sides of the first clamping block 42, then the ball 6 is arranged on the corresponding position of the upper surface of the base box 21, then the support base plate 3 is aligned and placed on the base box 21, the limiting shaft 41 penetrates out of the alignment hole 31 of the support base plate 3, the second clamping block 32 is inserted into the middle of two ends of the first torsion spring 5, finally the bolt penetrates into the limiting shaft 41 and is mutually fixed with the limiting shaft 41, and finally the claw disc 11, the support air rod 13, the connection base 2, the seat 14, the support handrail 15 and the backrest 16 are mutually fixed by a worker.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a connection base of swivel chair which characterized in that: including base box (21) that is used for and supports gas pole (13) and peg graft each other, the last fixed surface of base box (21) has a spacing axle (41), the top of base box (21) still is provided with one and seat support (14) interconnect's supporting baseplate (3), supporting baseplate (3) use spacing axle (41) to rotate as axle and base box (21) and be connected, still be provided with one between supporting baseplate (3) and base box (21) and be used for driving seat support (14) and rotate the elasticity piece that returns of return, the one end and the base box (21) screens of elasticity piece that returns are fixed, the other end and supporting baseplate (3) screens of elasticity piece that returns are fixed.

2. A swivel chair attachment base as claimed in claim 1, wherein: the base box (21) is detachably connected with a connecting seat (4), and the limiting shaft (41) is fixedly connected to one side, back to the base box (21), of the connecting seat (4).

3. A swivel chair attachment base as claimed in claim 2, wherein: the elastic return piece is a first torsion spring (5), one side of the fixed limiting shaft (41) of the connecting seat (4) is connected with a first clamping block (42) used for limiting the initial positions of the two ends of the first torsion spring (5), and the supporting bottom plate (3) is convexly provided with a second clamping block (32) used for driving one end of the first torsion spring (5) to move so as to enable the first torsion spring (5) to be elastically deformed towards one side of the base box (21).

4. A swivel chair attachment base as claimed in claim 1, wherein: the upper surface of the base box (21) is embedded with a plurality of balls (6) for supporting the supporting bottom plate (3) by taking the limiting shaft (41) as a shaft, and the balls (6) are in rolling connection with the base box (21).

5. A connection base of a swivel chair as claimed in claim 4, wherein: and a track (34) for accommodating the sliding of the ball (6) is formed in the position, corresponding to the ball (6), on the supporting bottom plate (3).

6. A swivel chair attachment base as claimed in claim 1, wherein: one side of the fixed limiting shaft (41) of the connecting seat (4) is fixed with a limiting convex block (44), one side of the supporting base plate (3) facing the base box (21) is fixedly connected with two stop blocks (33) used for limiting the maximum rotating angle of the supporting base plate (3), the two stop blocks (33) are located on two sides of the limiting convex block (44), and the limiting convex block (44) is located on the rotating path of the two stop blocks (33).

7. A swivel chair attachment base as claimed in claim 3, wherein: the circumferential surface of the limiting shaft (41) is fixedly connected with a plurality of position-stabilizing supporting blocks (43), and the position-stabilizing supporting blocks (43) are positioned in the first torsion spring (5).

8. A swivel chair attachment base as claimed in claim 7, wherein: the support base plate (3) is internally provided with a positioning hole (31) for accommodating the limiting shaft (41) to pass through, and the height of the stable support block (43) is lower than the height of the end face of the limiting shaft (41).

9. A connection base (2) of a swivel chair according to claim 1, characterized in that: be provided with restriction supporting baseplate (3) and base box (21) relative pivoted locking mechanism (8) in base box (21), locking mechanism (8) include limiting plate (81) of being connected with base box (21) inner wall slides, limiting plate (81) pierce through base box (21) upper surface and supporting baseplate (3) simultaneously, limiting plate (81) one side is provided with rotates with base box (21) inner wall and is connected and drive limiting plate (81) and break away from gyration dish (83) to supporting baseplate (3) screens, still be provided with in base box (21) and drive limiting plate (81) return to establish second torsional spring (96) of position to supporting baseplate (3) card, the one end and base box (21) of second torsional spring (96) are fixed, the other end and limiting plate (81) of second torsional spring (96) are fixed.