Rotation resetting device of swivel chair

Abstract

A rotation reset device of a swivel chair comprises a rotating shaft part, a shaft sleeve part arranged on the periphery of the rotating shaft part and a reset mechanism arranged between the rotating shaft part and the shaft sleeve part, the rotating shaft part is arranged on one of a chair base and a chair cushion, and the shaft sleeve part is arranged on the other one of the chair base and the chair cushion. And when the rotating shaft part and the shaft sleeve part relatively rotate to any angle, the rotating shaft part and / or the shaft sleeve part are / is automatically reset to the initial position under the action of a reset mechanism. The utility model provides a rotation resetting device of a swivel chair, which can automatically reset a chair cushion to an initial position when the chair cushion is not used, so that the use experience of the swivel chair is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of swivel chairs, and particularly relates to a rotation reset device for a swivel chair. Background Art

[0002] A swivel chair is one of the most commonly used furniture in an office. It includes a chair base and a chair seat cushion. The chair base and the chair seat cushion are rotatably connected through a rotating structure, so that the chair base is fixed on the ground, and the chair seat cushion can rotate, and it can meet the requirement that people can rotate to any angle when sitting on the swivel chair.

[0003] Patent Document No. CN106050926A discloses a swivel chair connecting shaft, which can be used for connecting other objects with different up-and-down rotations outside the swivel chair. It includes a housing, an upper shaft core and a lower shaft core. A snap ring is arranged between the upper shaft core and the lower shaft core. A POM plastic bushing is tightly sleeved on the lower shaft core. A plurality of fins are arranged on the bushing body of the POM plastic bushing. The housing is tightly sleeved on the POM plastic bushing. A washer is sleeved between the POM plastic bushing and the snap ring. The housing, the upper shaft core, the lower shaft core and the POM plastic bushing are all conical. The problem is that when the swivel chair adopts the connecting shaft with the above structure, it only has a rotating function. When the chair seat cushion rotates and a person leaves the swivel chair, the chair seat cushion always remains in the rotating direction and will not automatically reset to the original position. In this way, after the swivel chairs in an office, especially in a meeting room, are used, the directions of the swivel chairs are inconsistent. In order to keep the desks and chairs in the office neat, it is necessary to manually rotate the chair seat cushions of each swivel chair and face them towards the desks every time. The manual reset operation of the swivel chair is cumbersome and time-consuming, resulting in a poor use experience of this type of swivel chair.

[0004] Therefore, further improvement is needed. Summary of the Utility Model

[0005] The purpose of the utility model is to at least overcome one of the deficiencies existing in the above prior art, and to provide a rotation reset device for a swivel chair, which can automatically reset the chair seat cushion to the initial position when not in use, and improve the use experience of the swivel chair.

[0006] To achieve the above purpose, the technical solution provided by the embodiment of the utility model is:

[0007] A rotation reset device for a swivel chair includes a rotating shaft component, a bushing component arranged outside the rotating shaft component, and a reset mechanism arranged between the rotating shaft component and the bushing component. The rotating shaft component is arranged on one of the chair base and the chair seat cushion, and the bushing component is arranged on the other of the chair base and the chair seat cushion. When the rotating shaft component and the bushing component rotate relative to each other to any angle, under the action of the reset mechanism, the rotating shaft component and / or the bushing component can be automatically reset to the initial position.

[0008] The reset mechanism includes a reset rotation assembly, a ramp component disposed on the bushing component and cooperating with the reset rotation assembly, and a reset movement structure disposed on the rotating shaft component and used to automatically reset the rotating assembly to the initial position. The reset rotation assembly includes a rotating component and a fixed component. The rotating end of the rotating component abuts against the top surface of the ramp component, and its rotation axis is perpendicular to the rotation axis of the rotating shaft component. The fixed component passes through the fixed end of the rotating component and is connected to the reset movement structure.

[0009] A guiding cavity and a guiding groove are provided on the rotating shaft component. The guiding cavity penetrates the rotating shaft component vertically up and down. The guiding groove is disposed on the side wall of the rotating shaft component, communicates with the guiding cavity, and extends along the length direction of the rotating shaft component. The reset movement structure includes a follower component, an elastic component for downward reset of the follower component, a limiting component for limiting the elastic component, and a locking component for locking the elastic component. The follower component, the elastic component, and the limiting component are all disposed in the guiding cavity and are arranged in sequence from bottom to top. The fixed component extends into the guiding cavity through the guiding groove and is connected to the follower component. The locking component is detachably disposed on the follower component.

[0010] The follower component is provided with a fixed mounting portion for mounting the fixed component, a limiting portion for limiting the elastic component, and a locking mounting portion for mounting the locking component. The fixed mounting portion horizontally penetrates through the side of the follower component. The limiting portion is disposed on the top surface of the follower component. The locking mounting portion vertically penetrates through the follower component and communicates with the fixed mounting portion. The follower component is made of plastic material or plastic.

[0011] The reset movement structure further includes a first snap spring component for pressing the limiting component against the guiding cavity. The first snap spring component is disposed in the upper part of the guiding cavity.

[0012] The reset rotation assembly further includes a spacer gasket to leave a certain distance between the rotating component and the rotating shaft component. The spacer gasket is disposed between the rotating component and the follower component. The radial dimension of the spacer gasket is equivalent to the width dimension of the guiding groove. The thickness dimension of the spacer gasket is greater than the height dimension of the guiding groove. The spacer gasket is provided with a spacer through hole for the fixed component to pass through.

[0013] The ramp component is detachably mounted on the bushing component. The ramp component is made of plastic material or plastic. A limiting structure is provided between the ramp component and the bushing component to limit the installation of the ramp component on the bushing component. The limiting structure includes a limiting convex portion disposed on the ramp component and a limiting concave portion disposed on the bushing component. The limiting convex portions are several and are circumferentially arranged on the outer side wall of the ramp component. The limiting concave portions are several and are circumferentially arranged on the inner side wall of the bushing component. The limiting convex portion and the limiting concave portion are in limiting cooperation.

[0014] The ramp component includes two sets of symmetric slopes. The two sets of slopes are both arranged at 180° and are located on the top surface of the ramp component. The highest points of the two sets of slopes are connected to each other to form the highest point of the top surface of the ramp component, and the lowest points of the two sets of slopes are connected to each other to form the lowest point of the top surface of the ramp component. The two sets of slopes together constitute the annular top surface of the ramp component. The lowest point of the top surface of the ramp component is the initial position, and the highest point of the top surface of the ramp component is the reset position.

[0015] The rotation and reset device further includes a bearing assembly. The bearing assembly includes a first bearing and a second bearing. The first bearing is arranged between the rotating shaft component and the sleeve component and is located above the sleeve component. The second bearing is arranged between the rotating shaft component and the sleeve component and is located below the sleeve component.

[0016] The sleeve component is provided with a first sleeve step and a second sleeve step. Both the first sleeve step and the second sleeve step are arranged on the inner side wall of the sleeve component. The rotating shaft component is provided with a rotating shaft step and a second snap ring component. Both the rotating shaft step and the second snap ring component are arranged on the outer side wall of the rotating shaft step. The first sleeve step and the rotating shaft step cooperate with each other to fix the first bearing, and the second sleeve step and the second snap ring component cooperate with each other to fix the second bearing.

[0017] The beneficial effects of the present utility model are as follows:

[0018] By adopting the rotation and reset device of the swivel chair with the above technical solution, the present utility model has both a rotation function and a reset function at the same time. When a person sits on the swivel chair, the chair seat cushion can be rotated to any angle through the rotation and reset device. When the chair seat cushion rotates and the person leaves the swivel chair, the chair seat cushion can automatically reset to the initial position through the rotation and reset device, and the reset of the chair seat cushion can be completed without manual intervention, reducing the operation of manually resetting the swivel chair, and to a certain extent, improving the use experience of the swivel chair adopting the rotation and reset device with the above technical solution. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of the rotation and reset device of an embodiment of the present utility model.

[0020] Figure 2 It is an exploded view of the rotation and reset device of an embodiment of the present utility model.

[0021] Figure 3 It is an exploded view of the rotation and reset device of an embodiment of the present utility model.

[0022] Figure 4 It is a cross-sectional view of the rotation and reset device of an embodiment of the present utility model.

[0023] Figure 5This is an exploded view of the reset mechanism according to an embodiment of the present utility model.

[0024] Figure 6 This is an exploded view of the reset mechanism according to an embodiment of the present utility model.

[0025] Figure 7 This is a schematic diagram of the rotational reset device according to an embodiment of the present utility model when it is in the initial position.

[0026] Figure 8 This is a schematic diagram of the rotational reset device according to an embodiment of the present utility model when it is in the reset position. Detailed implementation manners

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0028] See Figure 1-8, the rotation and reset device of this swivel chair includes a rotating shaft component 1, a shaft sleeve component 2 and a reset mechanism. The rotating shaft component 1 is preferably fixedly connected to the bottom surface of the chair seat cushion and is made of a metal material. It is provided with a guide cavity 101 and a guide groove 102. The guide cavity 101 penetrates the rotating shaft component 1 up and down. The guide groove 102 is arranged on the side wall of the rotating shaft component 1, communicates with the guide cavity 101 and extends along the length direction of the rotating shaft component 1. The shaft sleeve component 2 is preferably fixedly connected to the top surface of the chair base and is arranged outside the rotating shaft component 1 and is made of a metal material. The reset mechanism is arranged between the rotating shaft component 1 and the shaft sleeve component 2. In this embodiment, the reset mechanism includes a reset rotating component 4, a ramp component 3 and a reset moving structure 5. The ramp component 3 is arranged in the inner cavity of the shaft sleeve component 2 and cooperates with the reset rotating component 4. The reset moving structure 5 is arranged on the rotating shaft component 1 and is connected to the reset rotating component 4, so that the reset moving component is reset to the initial position through the reset moving structure 5. The reset rotating component 4 includes a rotating part 41 and a fixing part 42. The rotating part 41 is preferably a rotating bearing and its rotating end abuts against the top surface of the ramp component 3. Its rotation axis is perpendicular to the rotation axis of the rotating shaft component 1. The fixing part 42 is preferably a screw, a pin, etc. and passes through the fixed end of the rotating part 41 and is fixedly connected to the reset moving structure 5, so that the reset moving component is fixedly connected to the reset moving structure 5. When the rotating shaft component 1 and the shaft sleeve component 2 rotate relative to each other to any angle, specifically, the rotation angle between the chair seat cushion and the chair base is A. When the swivel chair is stationary and A is equal to 0°, the rotating shaft component 1 or the shaft sleeve component 2 is in the initial position, the rotating part 41 is at the lowest point of the top surface of the ramp component 3, and the reset moving component moves to the lowest point of the guide groove 102. When a person sits on the swivel chair, the chair seat cushion rotates relative to the chair base through the rotation and reset device. When 0° < A ≤ 180°, the rotating shaft component 1 or the shaft sleeve component 2 is gradually forced to move away from the initial position and approach the reset position. The rotating part 41 moves from the lowest point of the top surface of the ramp component 3 towards the highest point and reaches the reset position. The reset moving component moves from the lowest point of the guide groove 102 towards the highest point and moves to the highest point of the guide groove 102. When a person leaves the swivel chair and the rotating shaft component 1 or the shaft sleeve component 2 is no longer stressed, the reset moving component is automatically reset to the initial position through the reset moving structure 5, so that the chair seat cushion is automatically reset to the initial position, and the reset of the chair seat cushion can be completed without manual intervention, reducing the operation of manually resetting the swivel chair, and to a certain extent, it can improve the use experience of the swivel chair adopting the above technical solution rotation and reset device.

[0029] Further, the reset moving structure 5 includes a follower member 51, an elastic member 52, a limiting member 53, and a locking member 54. The follower member 51 is disposed in the guiding cavity 101 and located below the rotating shaft member 1. The limiting member 53 is disposed in the guiding cavity 101 and located above the rotating shaft member 1. The elastic member 52 is preferably a compression spring or a nitrogen spring and is disposed between the follower member 51 and the limiting member 53 to reset the follower member 51 downward away from the lowest point of the guiding groove 102. The limiting member 53 and the follower member 51 cooperate with each other to limit the elastic member 52. Specifically, the limiting member 53 extends downward with a limiting post, and the diameter of the limiting post is slightly smaller than the inner diameter of the elastic member 52 so that the limiting post can extend into the inner hole of the elastic member 52. The follower member 51 is provided with a limiting portion 511, which extends upward from the top surface of the follower member 51, and its radial dimension is slightly smaller than the inner diameter of the elastic member 52 so that the limiting portion 511 can extend into the inner hole of the elastic member 52. Under the interaction between the limiting post and the limiting portion 511, the elastic member 52 is limited between the follower member 51 and the limiting member 53. The fixing member 42 extends into the guiding cavity 101 through the guiding groove 102 and is connected to the follower member 51. Specifically, the follower member 51 is provided with a fixing and mounting portion 510, which is preferably a threaded hole and is horizontally disposed through the side portion of the follower member 51. The fixing member 42 and the fixing and mounting portion 510 cooperate with each other so that the fixing member 42 is connected to the follower member 51. The locking member 54 is preferably an internal hexagonal socket set screw and is detachably disposed on the follower member 51. Specifically, the follower member 51 is provided with a locking and mounting portion 512, which is a threaded hole and is vertically disposed through the follower member 51 and communicates with the fixing and mounting portion 510. The locking member 54 is mounted on the follower member 51 through the locking and mounting portion 512, so that the elastic member 52 will not become loose in the guiding cavity 101 to prevent the elastic member 52 from losing its reset function. The elastic member 52, the limiting member 53, and the locking member 54 are all made of metal materials, and the follower member 51 is made of plastic material or plastic material, which reduces the production cost of the rotation reset device on the premise of ensuring the use effect of the rotation reset device, and can be understood by those skilled in the art.

[0030] Further, the reset moving structure 5 further includes a first snap ring member 55. Specifically, in this embodiment, the first snap ring member 55 is preferably a hole snap ring. The upper part of the side wall of the guiding cavity 101 is provided with a first snap ring groove. The first snap ring member 55 is detachably mounted on the upper part of the side wall of the guiding cavity 101 through the first snap ring groove. The inner diameter of the first snap ring member 55 is smaller than the radial dimension of the top end of the limiting member 53 to block the limiting member 53. Through the above technical solutions, the limiting member 53 is abutted against the upper part of the guiding cavity 101 to prevent the limiting member 53 from coming out of the top opening of the guiding cavity 101, and can be understood by those skilled in the art.

[0031] Furthermore, the reset rotation assembly 4 further includes a spacer gasket 43. Specifically, in this embodiment, the spacer gasket 43 is preferably made of a metal material and is installed between the rotating member 41 and the follower member 51 through a fixing member 42. The width dimension of the spacer member is slightly smaller than the width dimension of the guide groove 102, and the length dimension of the spacer member is smaller than the length dimension of the guide groove 102, so that the spacer member can move up and down in the guide groove 102. The thickness dimension of the spacer member is larger than the height dimension of the guide groove 102 to leave a certain distance between the rotating member 41 and the rotating shaft member 1, avoiding interference between the rotating member 41 and the rotating shaft member 1. A spacer through hole 430 is provided on the spacer gasket 43, and the fixing member 42 passes through the spacer through hole 430 and is connected to the follower member 51, so that the spacer gasket 43 is installed on the reset rotation assembly 4, which can be understood by those skilled in the art.

[0032] Furthermore, the ramp member 3 is detachably installed on the bushing member 2. Specifically, an interference fit is provided between the ramp member 3 and the bushing member 2. A limiting structure is provided between the ramp member 3 and the bushing member 2. Specifically, in this embodiment, the limiting structure includes a limiting convex portion 301 and a limiting concave portion 201. The number of the limiting convex portions 301 is preferably four and is circumferentially arranged on the outer side wall of the ramp member 3. The limiting concave portion 201 is correspondingly matched with the limiting convex portion 301, and the number of the limiting concave portions 201 is preferably four and is circumferentially arranged on the inner side wall of the bushing member 2. Through the above technical solution, the limiting convex portion 301 and the limiting concave portion 201 cooperate with each other to limit and install the ramp member 3 on the bushing member 2, which can be understood by those skilled in the art.

[0033] Furthermore, the ramp member 3 includes two groups of symmetric slopes 302. Specifically, in this embodiment, the ramp member 3 is made of a plastic material or a plastic material, reducing the production cost of the rotation reset device while ensuring the use effect of the rotation reset device. The horizontal projections of the two groups of slopes 302 are both set at 180° and are located on the top surface of the ramp member 3. The highest points of the two groups of slopes 302 are connected to each other to form the highest point of the top surface of the ramp member 3, and the lowest points of the two groups of slopes 302 are connected to each other to form the lowest point of the top surface of the ramp member 3. The two groups of slopes 302 together form a ring-shaped top surface of the ramp member 3. The lowest point of the top surface of the ramp member 3 is the initial position, and the highest point of the top surface of the ramp member 3 is the reset position. Through the above technical solution, when the rotating member 41 moves to the highest point of the top surface of the ramp member 3, the reset rotation assembly moves to the highest point of the guide groove 102, and when the rotating member 41 moves to the lowest point of the top surface of the ramp member 3, the reset rotation assembly moves to the lowest point of the guide groove 102, which can be understood by those skilled in the art.

[0034] Furthermore, the rotation reset device further includes a bearing assembly. Specifically, in this embodiment, the bearing assembly includes a first bearing 61 and a second bearing 62. The first bearing 61 is disposed between the rotating shaft member 1 and the sleeve member 2 and is located above the sleeve member 2. A first sleeve step 202 is provided on the sleeve member 2. The first sleeve step 202 is disposed on the inner sidewall of the sleeve member 2 and is close to the top end of the sleeve member 2. A rotating shaft step 103 is provided on the rotating shaft member 1. The rotating shaft step 103 is disposed on the outer sidewall of the rotating shaft step 103 and is located in the middle of the rotating shaft member 1. The first sleeve step 202 and the rotating shaft step 103 cooperate with each other to fix the first bearing 61. The second bearing 62 is disposed between the rotating shaft member 1 and the sleeve member 2 and is located below the sleeve member 2. A second sleeve step 203 is provided on the sleeve member 2. The second sleeve step 203 is disposed on the inner sidewall of the sleeve member 2 and is close to the bottom end of the sleeve member 2. A second snap ring member 104 is disposed on the outer sidewall of the rotating shaft step 103. The second sleeve step 203 and the second snap ring member 104 cooperate with each other to fix the second bearing 62. Through the above technical solutions, the relative rotation between the rotating shaft member 1 and the sleeve member 2 is made more stable, which can be understood by those skilled in the art.

[0035] The above is the preferred solution of the present invention, which shows and describes the basic principle, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotation resetting device for a swivel chair, characterized in that: The invention comprises a rotating shaft component (1), a shaft sleeve component (2) arranged on the periphery of the rotating shaft component (1), and a reset mechanism arranged between the rotating shaft component (1) and the shaft sleeve component (2), wherein the rotating shaft component (1) is arranged on one of the chair base and the chair seat cushion, and the shaft sleeve component (2) is arranged on the other of the chair base and the chair seat cushion. When the rotating shaft component (1) and the shaft sleeve component (2) are relatively rotated to any angle, the rotating shaft component (1) and / or the shaft sleeve component (2) are automatically reset to the initial position under the action of the reset mechanism.

2. The rotation resetting device of a swivel chair according to claim 1, characterized in that: The reset mechanism comprises a reset rotating component (4), a ramp component (3) arranged on the shaft sleeve component (2) and cooperating with the reset rotating component (4), and a reset moving structure (5) arranged on the rotating shaft component (1) and used for automatically resetting the reset rotating component to an initial position. The reset rotating component (4) comprises a rotating component (41) and a fixed component (42). The rotating end of the rotating component (41) abuts against the top surface of the ramp component (3), and its rotating axis is perpendicular to the rotating axis of the rotating shaft component (1). The fixed component (42) passes through the fixed end of the rotating component (41) and is connected to the reset moving structure (5).

3. The rotation resetting device of a swivel chair according to claim 2, characterized in that: The rotating shaft component (1) is provided with a guide cavity (101) and a guide groove (102); the guide cavity (101) passes through the rotating shaft component (1) from top to bottom; the guide groove (102) is provided on the side wall of the rotating shaft component (1) and communicates with the guide cavity (101) and extends along the length direction of the rotating shaft component (1); the resetting movement structure (5) comprises a follower component (51), an elastic component (52) for resetting the follower component (51) downward, and a limiting elastic component (52) for limiting the position of the follower component (51); The movable component (51), the elastic component (52) and the limiting component (53) are all arranged in the guide cavity (101) and are arranged in sequence from bottom to top; the fixing component (42) extends into the guide cavity (101) through the guide groove (102) and is connected to the movable component (51); and the locking component (54) is detachably arranged on the movable component (51).

4. The rotation resetting device of a swivel chair according to claim 3, characterized in that: The following component (51) is provided with a fixing installation portion (510) for installing the fixing component (42), a limiting portion (511) for limiting the elastic component (52), and a locking installation portion (512) for installing the locking component (54); the fixing installation portion (510) is horizontally penetrated through the side of the following component (51); the limiting portion (511) is arranged on the top surface of the following component (51); the locking installation portion (512) is vertically penetrated through the following component (51) and communicated with the fixing installation portion (510); the following component (51) is made of a plastic material or a plastic material.

5. The rotation resetting device of a swivel chair according to claim 3, characterized in that: The resetting movement structure (5) further comprises a first clamping spring component (55) for mounting the limiting component (53) against the guide cavity (101); the first clamping spring component (55) is arranged at the upper part of the guide cavity (101).

6. The rotation resetting device of a swivel chair according to claim 3, characterized in that: The reset rotation assembly (4) further comprises a spacing gasket (43) to leave a certain distance between the rotating component (41) and the rotating shaft component (1); the spacing gasket (43) is arranged between the rotating component (41) and the follower component (51); the radial dimension of the spacing gasket (43) is equivalent to the width dimension of the guide groove (102); the thickness dimension of the spacing gasket (43) is greater than the height dimension of the guide groove (102); and the spacing gasket (43) is provided with a spacing through hole (430) for the fixing component (42) to pass through.

7. The rotation resetting device of a swivel chair according to claim 2, characterized in that: The ramp component (3) is detachably mounted on the shaft sleeve component (2); the ramp component (3) is made of a plastic material or a plastic material; a limiting structure is provided between the ramp component (3) and the shaft sleeve component (2) so that the ramp component (3) is limitedly mounted on the shaft sleeve component (2); the limiting structure comprises a limiting convex portion (301) provided on the ramp component (3) and a limiting concave portion (201) provided on the shaft sleeve component (2); the limiting convex portions (301) are a plurality of circumferentially arranged on the outer side wall of the ramp component (3); the limiting concave portions (201) are a plurality of circumferentially arranged on the inner side wall of the shaft sleeve component (2); the limiting convex portions (301) and the limiting concave portions (201) are limitedly matched.

8. The rotation resetting device of a swivel chair according to claim 2, characterized in that: The ramp component (3) comprises two groups of symmetrical slope surfaces (302), the two groups of slope surfaces (302) are arranged at 180 degrees and are located on the top surface of the ramp component (3), the highest points of the two groups of slope surfaces (302) are connected to each other and form the highest point of the top surface of the ramp component (3), the lowest points of the two groups of slope surfaces (302) are connected to each other and form the lowest point of the top surface of the ramp component (3), the two groups of slope surfaces (302) together constitute the top surface of the ramp component (3) in an annular shape, the lowest point of the top surface of the ramp component (3) is the initial position, and the highest point of the top surface of the ramp component (3) is the reset position.

9. The rotation resetting device of a swivel chair according to claim 1, characterized in that: The rotation resetting device further comprises a bearing assembly, the bearing assembly comprising a first bearing (61) and a second bearing (62), the first bearing (61) being arranged between the rotating shaft component (1) and the shaft sleeve component (2) and being located at the upper part of the shaft sleeve component (2), and the second bearing (62) being arranged between the rotating shaft component (1) and the shaft sleeve component (2) and being located at the lower part of the shaft sleeve component (2).

10. The rotation resetting device of a swivel chair according to claim 9, characterized in that: The shaft sleeve component (2) is provided with a first shaft sleeve step (202) and a second shaft sleeve step (203), and the first shaft sleeve step (202) and the second shaft sleeve step (203) are both arranged on the inner side wall of the shaft sleeve component (2); the shaft component (1) is provided with a shaft step (103) and a second retaining spring component (104), and the shaft step (103) and the second retaining spring component (104) are both arranged on the outer side wall of the shaft step (103); the first shaft sleeve step (202) and the shaft step (103) cooperate with each other to fix the first bearing (61), and the second shaft sleeve step (203) and the second retaining spring component (104) cooperate with each other to fix the second bearing (62).

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