Automatic reset rotating shaft mechanism and chair structure

Abstract

The utility model provides an automatic reset rotating shaft mechanism and a chair structure, relates to the table and chair structure technology, and particularly discloses a fixing seat, an assembling opening is formed in the side wall of the fixing seat, a rotating piece is arranged in the assembling opening, and the rotating piece partially penetrates through the assembling opening and then extends outwards. A connecting piece is installed at the extending end of the rotating piece, a reset structure in transmission connection with the rotating piece is installed in the assembling opening, elastic deformation energy is stored through the reset structure, the rotating piece is driven to automatically return after external force is removed, and efficient and stable reset action is achieved. The bidirectional torsion spring design allows automatic resetting after positive and negative rotation, and meets the requirements of multiple scenes.

Description

Technical Field

[0001] This utility model relates to the field of table and chair structure technology, specifically to an automatic reset pivot mechanism and chair structure. Background Technology

[0002] Swivel chairs on the market can be raised, lowered, and rotated, making them simple and easy to use, suitable for use in bars, offices, schools, homes, and other places. Although they have both raising and rotating functions, and the seat of a swivel chair can rotate freely 360° relative to the legs, which is very convenient, when the person leaves after rotating, the seat remains in the position after the rotation is completed. This means that chairs with backrests will not automatically return to the set position (or automatically return to center) after returning to their original position.

[0003] Most existing swivel chairs use a swing arm mechanism for resetting, but the swing arm mechanism mostly uses a motor or electromagnetic drive to achieve resetting, which has problems such as high energy consumption, complex structure, and high failure rate. Some mechanical resetting mechanisms store energy through torsion springs, but lack damping buffer, which can easily cause resetting overshoot or jitter due to inertia, affecting stability. Utility Model Content

[0004] The purpose of this utility model is to provide an automatic reset shaft mechanism that addresses the shortcomings of existing technologies and solves the problems mentioned in the background.

[0005] The technical solution of this utility model is implemented as follows:

[0006] The utility model provides an automatic reset rotating shaft mechanism, including a fixed base, an assembly port on the side wall of the fixed base, a rotating component installed in the assembly port, a portion of the rotating component extending outward through the assembly port, a connecting component installed on the extended end of the rotating component, and a reset structure that is connected to the rotating component in a transmission manner installed in the assembly port.

[0007] In some technical solutions of this utility model, a first partition plate is installed in the assembly port, a rotating component is rotatably disposed on the outer side wall of the first partition plate, a damper is installed on the side of the first partition plate away from the rotating component, and a connecting structure detachably connected to the damper is installed inside the rotating component.

[0008] In some technical solutions of this utility model, the connecting structure includes a bearing installed inside the rotating component, the outer ring of the bearing being connected to the rotating component, a transmission component being installed on the inner ring of the bearing, the transmission component extending outward after passing through the damper, and an open retaining ring abutting against the damper being installed on the transmission component.

[0009] In some technical solutions of this utility model, a limiting plate that abuts against the first partition is installed on the outer side wall of the rotating part.

[0010] In some technical solutions of this utility model, the reset structure includes a bidirectional torsion spring sleeved on the outer wall of the rotating part, an adjusting plate slidably provided on the outer wall of the rotating part, a plurality of mounting holes opened along the extension direction of the rotating part, mounting bolts installed in the mounting holes, and a limiting structure for limiting the deflection of the torsion spring provided in the assembly port.

[0011] In some technical solutions of this utility model, the limiting structure includes a stop rod installed in the assembly port, and the stop rod is placed between the two outer extensions of the bidirectional torsion spring.

[0012] In some technical solutions of this utility model, a bushing is installed on the outer side wall of the rotating part, and the outer side wall of the bushing abuts against the inner wall of the assembly port.

[0013] In some technical solutions of this utility model, a connecting sleeve is installed on the side wall of the connector, the connecting sleeve is installed inside the rotating part, and the connecting sleeve and the rotating part are detachably connected.

[0014] 9. A chair structure, comprising an automatic reset pivot mechanism, a chair body, and a chair base, wherein the chair body and the automatic reset pivot mechanism are detachably connected, and a fixed seat in the automatic reset pivot mechanism is installed in the chair base.

[0015] Compared with the prior art, this utility model has at least the following advantages or beneficial effects: it stores energy through the elastic deformation of the reset structure, and drives the rotating part to automatically return to its original position after the external force is removed, thus achieving efficient and stable reset action; the bidirectional torsion spring design allows for automatic reset after rotation in both directions, adapting to multiple scenario requirements; the rotating part and the fixed seat cooperate through the assembly port to provide stable rotation support, reduce structural sway, adapt to different load requirements; the limiting plate contacts the first partition plate to limit the maximum rotation angle of the rotating part, avoid overtravel damage to the internal structure, and protect the reset mechanism and damper. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the installation structure of the fixed base in this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the fixing base in this utility model.

[0018] Figure 3 This is a bottom-view three-dimensional structural diagram of the fixed base in this utility model.

[0019] Figure 4 This is a cross-sectional three-dimensional structural diagram of the fixing base in this utility model.

[0020] Figure 5 This is an exploded structural diagram of the fixed base in this utility model.

[0021] Reference numerals in the attached drawings: 1. Fixed seat; 2. Chair body; 3. Chair base; 4. Connecting component; 5. Connecting sleeve; 6. Transmission component; 7. Damper; 8. First partition plate; 9. Bearing; 10. Rotating component; 11. Double-acting torsion spring; 12. Adjusting plate; 13. Limiting plate; 14. Connecting rod; 15. Mounting bolt; 16. Bushing; 17. Limiting screw; 18. Stop rod; 19. Limiting block. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0024] Example

[0025] This utility model provides an automatic reset rotating shaft mechanism, such as Figures 1-5 As shown, the device includes a fixed base 1, which is a cylindrical structure. An assembly opening is provided on the side wall of the fixed base 1. The center of the circle containing the assembly opening is coaxial with the center of the circle containing the fixed base 1. A rotating component 10 is installed inside the assembly opening. A portion of the rotating component 10 extends outward through the assembly opening, and a connecting component 4 is installed on the extended end of the rotating component 10. A reset structure, which is connected to the rotating component 10 in a transmission manner, is installed inside the assembly opening. The rotating component 10 is mounted on the fixed base 1 through the assembly opening, and its extended end is connected to an external component. When an external force drives the rotating component 10 to rotate, the reset structure stores energy; after the external force is removed, the reset structure releases energy, driving the rotating component 10 to automatically return to its original position. The automatic reset function is achieved by utilizing the elastic deformation of the reset structure to store energy. The assembly design of the rotating component 10 and the fixed base 1 provides stable rotational support.

[0026] In some technical solutions of this utility model, a first partition 8 is installed inside the assembly port. The first partition 8 is welded to the inner wall of the fixed base 1. The rotating component 10 is rotatably mounted on the outer wall of the first partition 8. A damper 7 is installed on the side of the first partition 8 opposite to the rotating component 10. A connecting structure detachably connected to the damper 7 is installed inside the rotating component 10. The first partition 8 isolates the area between the rotating component 10 and the damper 7. The damper 7 is linked to the rotating component 10 through the connecting structure. During rotation, the damper 7 generates resistance, slowing down the rotation speed. The damper 7 consumes kinetic energy through friction or fluid resistance, preventing excessively fast reset or vibration. The detachable connection facilitates maintenance or replacement of the damper 7, improves the smoothness of the damper 7's movement, and avoids impact. The damper 7 is a conventional technical means.

[0027] In some technical solutions of this utility model, the connecting structure includes a bearing 9 installed inside the rotating component 10. The outer ring of the bearing 9 is connected to the rotating component 10, and a transmission component 6 is installed on the inner ring of the bearing 9. The transmission component is a cylindrical structure with a triangular, quadrilateral, pentagonal, or hexagonal cross-section, preferably hexagonal steel. The transmission component 6 extends outward after passing through the damper 7, and an open retaining ring that abuts against the damper 7 is installed on the transmission component 6. The inner ring of the bearing 9 is fixed to the damper 7 through the transmission component 6, and the open retaining ring prevents the damper 7 from separating from the rotating component 10. During rotation, the outer ring of the bearing 9 rotates with the rotating component 10, while the inner ring remains relatively stationary, reducing friction during rotation. The transmission component 6 and the open retaining ring achieve axial positioning and pressure adjustment of the damper 7. The bearing 9 ensures smooth rotation and extends its service life. When the transmission component 6 rotates, it drives the damper to rotate, generating damping force. The transmission component 6 mechanically connects the damper 7 to the fixed seat 1, which improves the reliability of the connection.

[0028] In some technical solutions of this utility model, a limiting plate 13 that abuts against the first partition plate 8 is welded to the outer wall of the rotating part 10. The limiting plate 13 contacts the first partition plate 8 and has an arc-shaped groove. A limiting screw 17 is installed on the first partition plate by means of a threaded connection. The head of the limiting screw 17 is placed in the arc-shaped groove to limit the maximum rotation angle of the rotating part 10, that is, the rotating part 10 rotates 90 degrees. Physical limiting prevents overtravel of rotation, controls the rotation range, protects the internal structure, and avoids damage to the reset structure due to overload.

[0029] In some technical solutions of this utility model, the reset structure includes a bidirectional torsion spring 11 disposed on the outer side wall of the rotating member 10. An adjusting plate 12 is slidably disposed on the outer side wall of the rotating member 10, and an adjusting structure is provided on the outer side wall of the rotating member 10 for adjusting the relative distance between the adjusting plate 12 and the limiting plate 13. The bidirectional torsion spring 11 is sleeved on the outside of the rotating member 10, and the torsion spring is pre-tightened in both directions to provide a rebound force, and the bidirectional torsion spring 11 supports automatic return in both forward and reverse directions. The limiting structure includes a stop rod 18 installed in the assembly port, and the stop rod 18 is placed between the two outer extensions of the bidirectional torsion spring 11 to force the bidirectional torsion spring 11 to twist within the rotating member and the fixed seat, facilitating the reset of the chair structure.

[0030] Preferably, a limiting block 19 is installed axially on the inner wall of the mounting base 1. The limiting block 19 is located between the two outer extensions of the bidirectional torsion spring 11 and, synchronously with the stop rod 18, limits the movement of the bidirectional torsion spring 11. When the rotating member 10 rotates clockwise, the outer extension at the bottom of the bidirectional torsion spring 11 abuts against the limiting block 19, and the outer extension at the top of the bidirectional torsion spring 11 disengages from the limiting block 19; when the rotating member 10 rotates counterclockwise, the outer extension at the top of the bidirectional torsion spring 11 abuts against the limiting block 19, and the outer extension at the bottom of the bidirectional torsion spring 11 disengages from the limiting block 19.

[0031] In some technical solutions of this utility model, the adjustment structure includes a plurality of mounting holes extending along the rotational member 10, and mounting bolts 15 are installed in the mounting holes. The mounting bolts 15 are inserted into the mounting holes to lock the position of the adjustment plate 12 to fix the tension of the torsion spring. The mounting bolts 15 act as mechanical locking elements to prevent the adjustment plate 12 from suddenly shifting.

[0032] In some technical solutions of this utility model, a bushing 16 is installed on the outer side wall of the rotating component 10, and the outer side wall of the bushing 16 abuts against the inner wall of the assembly port. The bushing 16 encloses the rotating component 10 and slides in contact with the inner wall of the assembly port. As a wear-resistant layer, the bushing 16 reduces the direct friction between the rotating component 10 and the fixed seat 1, reduces wear, extends the service life of the mechanism, and improves the smoothness of rotation.

[0033] In some technical solutions of this utility model, a connecting sleeve 5 is installed on the side wall of the connecting member 4, and the connecting member 4 and the connecting sleeve 5 are welded together. The connecting sleeve 5 is installed inside the rotating member 10, and the connecting sleeve 5 and the rotating member 10 are detachably connected. The connecting member 4 is fixed to the rotating member 10 by the connecting sleeve 5 through a pin structure. The pin structure is a connecting rod 14, and the connecting rod 14 is a bolt structure that is detachable and replaceable. The connecting sleeve 5 serves as an adapter interface, allowing for quick replacement of the external connecting member 4. This expands the compatibility of the mechanism and facilitates maintenance and modification.

[0034] A chair structure includes an automatic reset pivot mechanism, a chair body 2, and a chair base 3. The chair body 2 is detachably connected to the automatic reset pivot mechanism, and a fixed seat 1 within the automatic reset pivot mechanism is installed inside the chair base 3. This mechanism connects the chair body 2 and the chair base 3, enabling both the chair body 2 and the chair base 3 to have an automatic reset function, thus improving the efficiency and convenience of using the swivel chair.

[0035] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic reset rotating shaft mechanism, characterized in that, It includes a fixed base (1), and an assembly port is provided on the side wall of the fixed base (1). A rotating component (10) is installed in the assembly port. A portion of the rotating component (10) extends outward after passing through the assembly port. A connecting component (4) is installed on the extended end of the rotating component (10). A reset structure that is connected to the rotating component (10) in a transmission is installed in the assembly port.

2. The automatic reset rotating shaft mechanism according to claim 1, characterized in that, It also includes a first partition (8) installed in the assembly port, the rotating part (10) is rotatably disposed on the outer side wall of the first partition (8), a damper (7) is installed on the side of the first partition (8) away from the rotating part (10), and a connection structure detachably connected to the damper (7) is installed inside the rotating part (10).

3. The automatic reset rotating shaft mechanism according to claim 2, characterized in that, The connection structure includes a bearing (9) installed in the rotating part (10), the outer ring of the bearing (9) is connected to the rotating part (10), a transmission part (6) is installed on the inner ring of the bearing (9), the transmission part (6) extends outward after passing through the damper (7), and an open retaining ring that abuts against the damper (7) is installed on the transmission part (6).

4. The automatic reset rotating shaft mechanism according to claim 2, characterized in that, A limiting plate (13) that abuts against the first partition (8) is installed on the outer side wall of the rotating part (10). An arc groove is provided on the limiting plate (13). A limiting screw (17) is installed on the first partition (8) by means of threaded connection. The head of the limiting screw (17) is placed in the arc groove.

5. The automatic reset rotating shaft mechanism according to claim 1, characterized in that, The reset structure includes a bidirectional torsion spring (11) disposed on the outer side wall of the rotating part (10), an adjusting plate (12) is slidably disposed on the outer side wall of the rotating part (10), a plurality of mounting holes are opened along the extension direction of the rotating part (10), mounting bolts (15) are installed in the mounting holes, and a limiting structure for limiting the deflection of the torsion spring is provided in the assembly port.

6. The automatic reset rotating shaft mechanism according to claim 5, characterized in that, The limiting structure includes a stop rod (18) installed in the assembly port, the stop rod (18) being positioned between the two extensions of the bidirectional torsion spring (11).

7. An automatic reset rotating shaft mechanism according to any one of claims 1-6, characterized in that, A bushing (16) is installed on the outer side wall of the rotating part (10), and the outer side wall of the bushing (16) abuts against the inner wall of the assembly port.

8. The automatic reset rotating shaft mechanism according to claim 7, characterized in that, A connecting sleeve (5) is installed on the side wall of the connector (4). The connecting sleeve (5) is installed inside the rotating part (10). The connecting sleeve (5) is detachably connected to the rotating part (10).

9. A chair structure, characterized in that, Includes an automatic reset pivot mechanism as described in any one of claims 1-8, a chair body (2), and a chair base (3), wherein the chair body (2) is detachably connected to the automatic reset pivot mechanism, and the fixed seat (1) in the automatic reset pivot mechanism is installed in the chair base (3).

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