Seat rotating mechanism

Abstract

The utility model discloses a seat rotating mechanism which comprises a middle cylinder and a main shaft, the main shaft is rotatably connected with the middle cylinder through a plurality of first bearings, a track wheel is arranged at one end, close to the middle cylinder, of the main shaft in a sleeved mode, and the track wheel is arranged in the middle cylinder and detachably connected with the middle cylinder. The side wall of the main shaft is provided with an idler wheel used for being matched with the track wheel, and the main shaft is further provided with a fixing part capable of sliding in a reciprocating mode in the axial direction of the main shaft and an elastic driving part used for driving the fixing part to move in the direction close to the track wheel. The roller, the elastic driving component, the fixing component and the track wheel are matched, so that the main shaft can be driven to automatically rotate and reset, the main shaft and the middle cylinder are fixed in the opposite direction under the condition of no influence of external stress, and the chair can automatically return to the preset direction and automatically return after being used, and is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of seat accessories, in particular to the technical field of seat rotation mechanisms. Background Art

[0002] A swivel chair is a computer chair, a type of office chair, and is a chair with a rotating seat. Swivel chairs are generally divided into two types: semi-swivel chairs and full-swivel chairs. A semi-swivel chair is one that can rotate 90 degrees to the left and right of the front. A full-swivel chair is one that can rotate 360 degrees. Most of the chairs currently on the market can rotate 360 degrees. The main structure of a swivel chair includes a chair portion for the human body to sit on, a base portion placed on the ground, and a shaft portion for connecting the base portion and the chair portion. The shaft portion is mainly responsible for support and rotation. When existing chairs are in use, their shaft portion is not provided with any directional structure. After a person leaves the chair, the chair cannot automatically return to its original direction or automatically return to its original position, which may affect the next use and affect the aesthetics. Summary of the Invention

[0003] The purpose of the utility model is to solve the problems in the prior art and to provide a seat rotation mechanism, which can automatically restore the chair to a predetermined direction and return to its original position after use.

[0004] To achieve the above-mentioned purpose, the present invention proposes a seat rotation mechanism, including a middle cylinder and a main shaft, the main shaft being rotatably connected to the middle cylinder through a plurality of first bearings, a track wheel being sleeved on one end of the main shaft close to the middle cylinder, the track wheel being arranged in the middle cylinder and detachably connected to the middle cylinder, a roller for cooperating with the track wheel being provided on the side wall of the main shaft, a fixing component which can slide back and forth along the axial direction of the main shaft and an elastic driving component for driving the fixing component to move toward the direction close to the track wheel, the track wheel being provided on the fixing component, a wheel surface for cooperating with the roller being provided on the side of the track wheel close to the roller, the wheel surface including a protruding peak point and a recessed valley point, and a transition slope being provided between the peak point and the valley point.

[0005] Preferably, the fixed component is a sliding block, a sliding cavity for cooperating with the sliding block is provided in the main shaft, the sliding block is slidably arranged in the sliding cavity, and an opening is provided along the axial direction on one side of the sliding cavity so that the roller is connected to the sliding block through the opening, and the elastic driving component is a spring provided in the sliding cavity.

[0006] Preferably, the middle tube outer sleeve is provided with an outer tube detachably connected thereto, one end of the outer tube is provided with a cover plate, and the outer tube and / or the cover plate are provided with a plurality of fixing holes.

[0007] Preferably, the outer tube is a square tube, the middle tube is a round tube, and the outer wall of the middle tube is provided with a plurality of directional protrusions for cooperating with the inner cavity of the outer tube.

[0008] Preferably, the outer tube is a 50mm*50mm square tube, and the middle tube is a round tube with an outer diameter of 45mm.

[0009] Preferably, a limit plate is provided on the end of the outer cylinder away from the cover plate, a through hole is provided in the middle of the limit plate for the main shaft to pass through, and a limit block is provided on the side of the limit plate close to the outer cylinder for filling the gap between the outer cylinder and the middle cylinder.

[0010] Preferably, the middle cylinder is provided with a hollow cylinder cavity arranged along its axial direction, one end of the cylinder cavity is provided with a mounting portion with an inner diameter larger than that of the cylinder cavity, a limiting step surface is provided between the mounting portion and the cylinder cavity, and the end of the track wheel away from the wheel surface is provided with a wheel body limiting convex ring for cooperating with the limiting step surface.

[0011] Preferably, the track wheel is provided with a plurality of screw holes, and the screws pass through the middle tube and are fixedly connected to the screw holes.

[0012] The beneficial effects of the seat rotation mechanism of the utility model are as follows: the utility model can drive the main shaft to automatically rotate and reset by arranging rollers, elastic driving components, fixing components and track wheels, and keep the relative direction between the main shaft and the middle tube fixed in the absence of external force. After the chair is used, it can automatically restore the predetermined direction and automatically return to the center, which is more convenient to use.

[0013] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of a seat rotation mechanism of the present invention.

[0015] Figure 2 The utility model is a structural schematic diagram of a seat rotation mechanism after removing the middle cylinder and the outer cylinder.

[0016] Figure 3 This is a schematic diagram of the main structure of a sliding block of a seat rotation mechanism of the utility model.

[0017] Figure 4 The utility model is a schematic diagram of the top view of the middle cylinder and the outer cylinder of the seat rotation mechanism.

[0018] Figure 5 This is a schematic diagram of the main structure of the middle tube.

[0019] Figure 6It is a schematic diagram of the cross-sectional structure of the middle tube.

[0020] Figure 7 It is a schematic diagram of the three-dimensional structure of the track wheel.

[0021] Figure 8 It is a schematic diagram of the three-dimensional structure of the limiting plate.

[0022] in:

[0023] 1-middle cylinder; 2-outer cylinder; 3-roller; 4-track wheel; 5-sliding block; 6-first bearing; 78-directional protrusion; 9-cover plate; 10-main shaft; 11-spring; 12-limiting plate; 13-cylinder cavity; 21-fixing hole; 41-wheel surface; 101-sliding cavity; 131-mounting part; 132-limiting step surface; 411-peak point; 412-valley point; 413-transition slope. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0025] In the description of this utility model, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0026] In the description of the present utility model, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0027] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances. Example 1

[0028] See Figure 1-Figure 7The utility model provides a seat rotation mechanism, including a middle cylinder 1 and a main shaft 10. One end of the main shaft 10 is rotatably connected to the middle cylinder 1 through a first bearing 6. A track wheel 4 is sleeved on the end of the main shaft 10 close to the middle cylinder 1. The track wheel 4 is arranged in the middle cylinder 1 and is detachably connected to the middle cylinder 1. A roller 3 for cooperating with the track wheel 4 is provided on the side wall of the main shaft 10. The main shaft 10 is also provided with a fixed component that can slide back and forth along the axial direction of the main shaft 10 and an elastic driving component for driving the fixed component to move toward the direction close to the track wheel 4. The track wheel 4 is arranged on the fixed component. A wheel surface 41 for cooperating with the roller 3 is provided on the side close to the roller 3, and the wheel surface 41 includes a protruding peak point 411 and a recessed valley point 412, and a transition slope 413 is provided between the peak point 411 and the valley point 412, wherein the fixed component is a sliding block 5, and a sliding cavity 101 for cooperating with the sliding block 5 is provided in the main shaft 10, and the sliding block 5 is slidably provided in the sliding cavity 101, and an opening is provided on one side of the sliding cavity 101 along its axial direction so that the roller 3 is connected to the sliding block 5 through the opening, and the elastic driving component is a spring 11 provided in the sliding cavity 101. In this embodiment, by providing a roller 3, an elastic driving component, a fixing component and a track wheel 4 to cooperate, the main shaft 10 can be driven to automatically reset and maintain a fixed relative direction with the middle tube 1 in the absence of external force. During use, the elastic driving component can drive the roller 3 to fit the wheel surface 41 of the track wheel 4. Since the wheel surface 41 includes a protruding peak point 411 and a recessed valley point 412, when the roller 3 fits the remaining positions except the valley point 412, the elastic force of the elastic driving component can drive the track wheel 4 and the main shaft 10 to rotate, so that the roller 3 remains in contact with the recessed valley point 412, releasing the elastic force of the elastic driving component, so that the seat can have an automatic reset function.

[0029] See Figure 1 、 Figure 4 The middle tube 1 is covered with an outer tube 2 which is detachably connected thereto. A cover plate 9 is provided at one end of the outer tube 2. Several fixing holes are provided on the outer tube 2 and the cover plate 9. The outer tube 2 is used to connect to the seat for easy installation and removal.

[0030] Preferably, the middle tube 1 and the outer tube 2 are detachably connected by a plurality of screws.

[0031] Preferably, the outer tube 2 is a square tube, and the middle tube 1 is a round tube. The outer wall of the middle tube 1 is provided with a plurality of directional protrusions 8 for engaging with the inner cavity of the outer tube 2. The directional protrusions 8 keep the middle tube 1 fixed and prevent it from rotating when installed inside the outer tube 2, thereby improving stability.

[0032] Preferably, the outer tube 2 is a 50mm*50mm square tube, and the middle tube 1 is a round tube with an outer diameter of 45mm.

[0033] See Figure 1 、 Figure 8 A stop plate 12 is provided on the end of the outer cylinder 2 away from the cover plate 9. A through hole is provided in the middle of the stop plate 12 for the spindle 10 to pass through. A stop bump 121 is provided on the side of the stop plate 12 near the outer cylinder 2 to fill the gap between the outer cylinder 2 and the middle cylinder 1. The stop plate 12 further improves stability and prevents the middle cylinder 1 from rotating or shaking relative to the outer cylinder 2. Example 2

[0034] See Figure 1 、 Figure 6 Based on the first embodiment, refer to Figure 1 The middle cylinder 1 has a hollow inner cavity 13 extending axially therefrom. A mounting portion 131 having a larger inner diameter than the inner cavity 13 is provided at one end of the inner cavity 13. A limiting stepped surface 132 is provided between the mounting portion 131 and the inner cavity 13. The track wheel 4 has a wheel body limiting protrusion 42 on its end away from the wheel surface 41, which is configured to engage with the limiting stepped surface 132. The mounting portion 131 and the limiting stepped surface 132 are capable of engaging with the wheel body limiting protrusion 42 of the track wheel 4, achieving a positioned installation of the track wheel 4, making installation more convenient and improving installation accuracy.

[0035] Preferably, the track wheel 4 is provided with two screw holes, and screws are passed through the middle cylinder 1 and fixedly connected to the screw holes. The track wheel 4 is provided separately from the middle cylinder 1 and fixed by screws, which makes installation and removal more convenient and easy to maintain.

[0036] Working process of this utility model:

[0037] During the operation of the seat rotation mechanism of the present invention, when in use, the elastic driving component can drive the roller 3 to fit into the wheel surface 41 of the track wheel 4. Since the wheel surface 41 includes a protruding peak point 411 and a recessed valley point 412, when the roller 3 fits into the remaining positions except the valley point 412, the track wheel 4 and the main shaft 10 can be driven to rotate under the action of the elastic force of the elastic driving component, so that the roller 3 remains in contact with the recessed valley point 412, and the elastic force of the elastic driving component is released, so that the seat can have an automatic reset function.

[0038] The standard parts used in this application document can all be purchased from the market, and the specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The electric slide rail slide, cylinder, welding machine, electric telescopic rod and internal components of the controller all adopt conventional models in the existing technology, and their internal structure belongs to the existing technology structure. Workers can complete normal operation of them according to the existing technical manual. In addition, the circuit connection adopts the conventional connection method in the existing technology, and no detailed description is given here.

[0039] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection of the present utility model. Therefore, based on the innovative concept of the present utility model, changes and modifications to the embodiments described herein, or equivalent structural or process transformations made using the contents of the present utility model specification and drawings, and direct or indirect application of the above technical solutions to other related technical fields are all included in the scope of protection of the present utility model patent.

Claims

1. A seat rotation mechanism, comprising a middle cylinder (1) and a main shaft (10), wherein the main shaft (10) is rotatably connected to the middle cylinder (1) via a plurality of first bearings (6), and is characterized in that: A track wheel (4) is sleeved on one end of the main shaft (10) close to the middle cylinder (1), and the track wheel (4) is arranged in the middle cylinder (1) and is detachably connected to the middle cylinder (1). A roller (3) for cooperating with the track wheel (4) is provided on the side wall of the main shaft (10). The main shaft (10) is also provided with a fixed component that can slide back and forth along the axial direction of the main shaft (10) and an elastic driving component for driving the fixed component to move toward the track wheel (4). The track wheel (4) is arranged on the fixed component. A wheel surface (41) for cooperating with the roller (3) is provided on one side of the track wheel (4) close to the roller (3). The wheel surface (41) includes a protruding peak point (411) and a recessed valley point (412). A transition slope (413) is provided between the peak point (411) and the valley point (412).

2. A seat rotation mechanism according to claim 1, characterized in that: The fixed component is a sliding block (5), a sliding cavity (101) for cooperating with the sliding block (5) is provided in the main shaft (10), the sliding block (5) is slidably arranged in the sliding cavity (101), and an opening is provided on one side of the sliding cavity (101) along its axial direction so that the roller (3) is connected to the sliding block (5) through the opening, and the elastic driving component is a spring (11) provided in the sliding cavity (101).

3. The seat rotation mechanism according to claim 1, wherein: The outer sleeve of the middle sleeve (1) is provided with an outer sleeve (2) detachably connected thereto, one end of the outer sleeve (2) is provided with a cover plate (9), and a plurality of fixing holes (21) are provided on the outer sleeve (2) and / or the cover plate (9).

4. A seat rotation mechanism according to claim 3, characterized in that: The outer tube (2) is a square tube, the middle tube (1) is a round tube, and the outer wall of the middle tube (1) is provided with a plurality of directional protrusions (8) for cooperating with the inner cavity of the outer tube (2).

5. The seat rotation mechanism according to claim 3, wherein: The outer tube (2) is a 50mm*50mm square tube, and the middle tube (1) is a round tube with an outer diameter of 45mm.

6. The seat rotation mechanism according to claim 3, wherein: A limiting plate (12) is provided on the end of the outer cylinder (2) away from the cover plate (9), a through hole for the main shaft (10) to pass through is provided in the middle of the limiting plate (12), and a limiting protrusion (121) for filling the gap between the outer cylinder (2) and the middle cylinder (1) is provided on the side of the limiting plate (12) close to the outer cylinder (2).

7. The seat rotation mechanism according to claim 1, wherein: A hollow cylinder cavity (13) is provided inside the middle cylinder (1) along its axial direction. A mounting portion (131) having an inner diameter larger than that of the cylinder cavity (13) is provided at one end of the cylinder cavity (13). A limiting step surface (132) is provided between the mounting portion (131) and the cylinder cavity (13). A wheel body limiting convex ring (42) for cooperating with the limiting step surface (132) is provided at one end of the track wheel (4) away from the wheel surface (41).

8. The seat rotation mechanism according to claim 1, wherein: The track wheel (4) is provided with a plurality of screw holes, and the screws pass through the middle cylinder (1) and are fixedly connected to the screw holes.

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