Connecting piece and connecting structure of rotating disc and supporting object and rotating disc device

Abstract

The connecting piece comprises a transverse pipe, a threaded connecting part is arranged at the end, close to the rotary table, of the inner wall of the transverse pipe, a retaining part used for preventing a bolt from retreating is arranged at the end, away from the rotary table, of the threaded connecting part, and after the threaded end of the bolt makes contact with the retaining part of the connecting piece, the threaded end of the bolt abuts against the retaining part of the connecting piece. The retaining part locks the bolt to prevent the bolt from loosening and retreating; the connecting structure comprises a connecting piece and a bolt, the periphery of the end, close to the head, of the bolt is smooth, external threads are arranged at the end, away from the head, of the bolt, and the end, away from the head, of the bolt penetrates through a rotary disc to be in threaded connection with a transverse pipe. At least one first gasket for preventing the turntable from being abraded is arranged between the turntable and the head of the bolt; the threads of the bolt make contact with the retaining part, the bolt is firmly locked, and the situation that the bolt loosens and retreats is avoided. The rotating disc device adopting the connecting structure can flexibly adjust the number of the gaskets according to the actual distance requirement, and is simple in structure and high in practicability.

Description

Technical Field

[0001] This utility model relates to a connector and connection structure between a turntable and a support, as well as a turntable device, and more particularly to a connector between a lottery turntable and a support, and a connection structure and lottery turntable device with an adjustable number of washers to adapt to different distance requirements. Background Technology

[0002] Spinning wheels, often used to liven up promotional events or for prize draws during programs, are a common prop in these activities. During use, the wheel is connected to a bracket via connectors and bolts. The user applies force to the wheel, causing it to rotate around the bolts and gradually stop. In existing spinning wheel installation structures, a plane bearing and friction plates are typically required to prevent the bolts from loosening or retracting during clockwise or counterclockwise rotation. Existing installation structures use many components, resulting in high costs and cumbersome installation and disassembly. Utility Model Content

[0003] This utility model provides a connector for a turntable and a support. The connector includes a threaded connection part and a locking part. After installation, when the threaded end of the bolt contacts the locking part of the connector, the locking part firmly locks the bolt, effectively preventing the bolt from loosening and retracting. This ensures that the bolt will not loosen or retract regardless of whether the turntable rotates clockwise or counterclockwise. Furthermore, this utility model also relates to a connection structure between the turntable and the support. Using this connection structure including the connector, the number of washers can be flexibly adjusted according to the actual distance requirements when installing the lottery turntable. The entire structure is simple in design and highly practical. This utility model is achieved through the following technical solutions:

[0004] A connector for a turntable and a support, the connector comprising a horizontal tube, wherein the inner wall of the horizontal tube is provided with a threaded connection at one end near the turntable, and a locking part for preventing bolts from retracting is provided at the other end of the threaded connection away from the turntable.

[0005] When the turntable is connected to the connector by bolts using the above technical solution, the external thread of the bolt is screwed into the horizontal tube and threadedly connected to the threaded connection part located inside the horizontal tube near the turntable. When the bolt is tightened further, the external thread contacts the anti-retraction part at the end of the threaded connection part away from the turntable. The anti-retraction part locks the bolt, preventing it from loosening and retracting.

[0006] As an improvement of this utility model, the horizontal tube is a plastic tube, the threaded connection part is an internal thread or internal threaded tube or nut fixed on the inner wall of the horizontal tube, the length of the threaded connection part is less than the length of the horizontal tube, the anti-reverse part is a smooth inner tube wall extending from the end of the threaded connection part away from the turntable to the end of the horizontal tube away from the turntable, and the space enclosed by the threaded connection part is connected to the space enclosed by the anti-reverse part.

[0007] Using the above technical solution, the external thread of the bolt can be quickly screwed into the threaded connection part. Then, by tightening the bolt, the end away from the bolt head contacts the smooth inner tube wall where the anti-reverse part is located. The thread of the bolt will press the plastic of the inner tube wall into the thread teeth of the bolt, thereby achieving the purpose of locking the bolt and preventing the bolt from loosening or retracting during operation. This connector has a simple structure, ingenious design, is easy to process, and has low cost.

[0008] As an improvement of this utility model, the inner wall surface of the horizontal tube where the anti-reverse part is located is flush with the middle of the threaded connection from the root to the crest.

[0009] Using the above technical solution, the bolt thread end is easy to screw into the anti-lock part when it comes into contact with the anti-lock part, and the bolt thread has a good locking effect after contacting the anti-lock part. If the inner wall surface of the horizontal tube where the anti-lock part is located is close to the thread crest of the threaded connection part, the bolt cannot be screwed into the anti-lock part for locking; if the inner wall surface of the horizontal tube where the anti-lock part is located is close to the thread root of the threaded connection part, the bolt locking effect cannot be achieved.

[0010] As an improvement of this utility model, the threaded connection part is an internally threaded tube or nut fixed to the inner wall of the horizontal tube, and the anti-reverse part is a nylon ring provided at the end of the internally threaded tube or nut away from the turntable.

[0011] By adopting the above technical solution, the nylon ring is directly pressed into the end of the internal threaded tube or nut away from the turntable, and then the entire threaded tube or nut is fixed to the inner wall of the horizontal tube. The structure is simple, easy to process, and low in cost.

[0012] As an improvement of this utility model, the connector further includes a fixing part disposed on the side of the horizontal tube away from the turntable for fixing the connector to the support.

[0013] As an improvement of this utility model, the fixing part is a baffle plate disposed on the side of the horizontal tube away from the turntable, the radial dimension of the baffle plate is larger than the radial dimension of the horizontal tube, the support is a plate-shaped support, and the baffle plate is provided with a connecting part for fixing the connecting member to the plate-shaped support.

[0014] Using the above technical solution, the radial dimension of the baffle is larger than the outer diameter of the horizontal pipe, and the connector and support can be fixed by the baffle. The whole structure is simple and easy to install and disassemble.

[0015] As an improvement of this utility model, the fixing part is a vertical tube integrally and vertically connected to the horizontal tube, the vertical tube is set at the end of the horizontal tube away from the turntable, the support is a rod-shaped support, and the vertical tube is sleeved on the rod-shaped support.

[0016] By adopting the above technical solution, a longitudinal tube is set at the end of the horizontal tube away from the turntable. The longitudinal tube is designed to be integrated with the horizontal tube and perpendicular to it. This makes it easy to fit the longitudinal tube onto the upper end of the rod-shaped support, thereby connecting the turntable and the support. This makes the connecting part simple in structure, easy to process, and more convenient to install and disassemble with the support.

[0017] A connection structure between a turntable and a support includes a bolt and the aforementioned connector. The bolt has a smooth outer circumference at one end near the head and an external thread at the other end away from the head. The bolt's end away from the head passes through the turntable and is threadedly connected to the horizontal pipe. The turntable is fitted onto the smooth section of the bolt and rotatably connected to it. At least one first washer is provided between the turntable and the bolt head to prevent wear on the turntable. When the bolt is tightened, the bolt's thread contacts the anti-reverse portion, which locks the bolt in place and prevents it from retracting.

[0018] By adopting the above technical solution, the turntable is fitted onto the smooth section near the bolt head, which facilitates the rotation of the turntable. At least one first washer is placed between the bolt head and the turntable to prevent wear on the turntable. Typically, the turntable is made of non-metallic material. During rotation, the first washer distributes the load on the bolt head, protecting the turntable from wear. Furthermore, the connector used in this connection structure can lock the bolt, eliminating unnecessary components such as plane bearings and elastic washers found in existing connection structures. This results in a simpler structure, saves materials, and lowers costs.

[0019] As an improvement of this utility model, at least one second washer is provided between the turntable and the horizontal tube to prevent wear on the turntable. By adopting the above technical solution, at least one second washer is also provided between the horizontal tube and the turntable to prevent wear on the turntable, which can better protect the turntable from wear.

[0020] A turntable device includes a turntable, a pointer, a support, and a connection structure between the turntable and the support. Using this technical solution, when installing the turntable, only the number of washers needs to be increased or decreased according to the required installation distance. The operation is simple, convenient, and low-cost. Attached Figure Description

[0021] Figure 1 This is a perspective view of the connecting member between the turntable and the support in one embodiment of the present utility model.

[0022] Figure 2 This is a cross-sectional view of the connection between the turntable and the support in one embodiment of the present invention.

[0023] Figure 3 This is an exploded view of the connection structure between the turntable and the support in one embodiment of the present invention;

[0024] Figure 4This is an assembly drawing of a turntable device according to one embodiment of the present utility model;

[0025] Figure 5 This is a perspective view of the connecting part (screw fixing method) between the turntable and the support according to another embodiment of the present invention;

[0026] Figure 6 This is a cross-sectional view of the connecting member (screw fixing method) between the turntable and the support according to another embodiment of the present invention;

[0027] Figure 7 This is a perspective view of the connecting member (irregular fixing method) between the turntable and the support according to another embodiment of the present invention;

[0028] Figure 8 This is an assembly drawing of a turntable device according to another embodiment of the present invention.

[0029] In the diagram: 1. Horizontal tube; 2. Vertical tube; 3. Bolt; 4. Turntable; 5. First washer; 6. Second washer; 7. Pointer; 8. Support; 9. Washer; 10. Baffle; 11. Threaded connection; 12. Anti-reverse part; 30. Bolt head; 80. Mounting hole; 102. Screw hole; 101. Limiting protrusion. Detailed Implementation

[0030] The technical solution of this utility model will be further described below with reference to the accompanying drawings and through embodiments. It should be noted that the following embodiments are used to help understand this utility model, but do not constitute a limitation thereof. Example

[0031] A connector between a turntable and a support includes a horizontal tube 1. The inner wall of the horizontal tube 1 has a threaded connection part 11 at one end near the turntable 4, and a backstop part 12 for preventing the bolt 3 from retracting at the other end of the threaded connection part 11 away from the turntable 4.

[0032] like Figure 1-2 As shown, in this embodiment, the horizontal tube 1 is a plastic tube, and the threaded connection 11 can be a thread directly formed on the inner wall of the horizontal tube 1, or it can be an internally threaded tube or nut fixed to the inner wall of the horizontal tube 1; the anti-reverse part is a smooth inner tube wall extending from the end of the threaded connection 11 away from the turntable 4 to the end of the horizontal tube 1 away from the turntable 4, and the space enclosed by the threaded connection 11 is connected to the space enclosed by the anti-reverse part 12. That is to say, the length of the threaded connection 11 is less than the length of the horizontal tube 1, that is, in this embodiment, the threaded connection 11 is not set through the entire inner wall of the horizontal tube 1; on the inner wall of the horizontal tube 1 from the end of the threaded connection 11 away from the turntable to the end of the horizontal tube 1 away from the turntable 4, there is a section of smooth tube wall without threads, which is the anti-reverse part 12.

[0033] With this setup, when the turntable is connected to the connector via bolts, the external thread of bolt 3 is screwed into the horizontal tube 1 and threadedly connected to the threaded connection part 11 located at one end of the horizontal tube 1 near the turntable 4. Initially, the external thread of bolt 3 can be quickly screwed into the threaded connection part 11 and engage with the threaded connection part. Then, by tightening bolt 3 with force, the end away from the bolt head 30 contacts the smooth inner tube wall where the anti-retraction part 12 is located. The thread of bolt 3 will press the plastic of the inner tube wall of the horizontal tube 1 into the space between the thread teeth of bolt 3, thereby achieving the purpose of locking bolt 3 and preventing bolt 3 from loosening or retracting during operation. This connector has a simple structure, ingenious design, is easy to process, and has low cost.

[0034] Preferably, in order to ensure that the threaded end of the bolt 3 can be smoothly screwed into the smooth pipe wall section where the anti-locking part 12 is located, and to ensure a good locking effect of the anti-locking part 12 on the bolt 3, the inner wall surface of the horizontal pipe 1 where the anti-locking part 12 is located is flush with the middle of the tooth root to tooth crest of the internal thread of the threaded connection part 11. The tooth crest refers to the top of the thread protrusion near the axis of the horizontal pipe 1; the tooth root refers to the bottom surface connecting two adjacent thread tooth sides, located at the lowest point of the thread. If the inner wall surface of the horizontal pipe 1 where the anti-locking part 12 is located is close to the tooth crest of the threaded connection part 11, the bolt 3 cannot be screwed into the anti-locking part 12 for locking; if the inner wall surface of the horizontal pipe 12 where the anti-locking part 12 is located is close to the tooth root of the threaded connection part 11, the effect of locking the bolt 3 cannot be achieved. Example

[0035] A connector between a turntable and a support includes a horizontal tube 1. The inner wall of the horizontal tube 1 has a threaded connection part 11 at one end near the turntable 4, and a backstop part 12 for preventing the bolt 3 from retracting at the other end of the threaded connection part 11 away from the turntable 4.

[0036] like Figure 5-6 As shown, in this embodiment, the threaded connection 11 is an internally threaded tube or nut fixed to the inner wall of the horizontal tube 1, and the anti-retraction part 12 is a nylon ring disposed at the end of the internally threaded tube or nut away from the turntable; when the threaded end of the bolt 3 contacts the nylon ring, the nylon ring and the bolt are locked together by friction, so that the bolt will not loosen and retract.

[0037] With this configuration, when the turntable 4 is connected to the connector via bolt 3, the external thread of bolt 3 is screwed into the horizontal tube 1 and threadedly connected to the threaded connection part 11 located at one end of the horizontal tube 1 near the turntable 4. Initially, the external thread of bolt 3 can be quickly screwed into the threaded connection part 11 and threadedly engaged with it. Then, bolt 3 is tightened so that the end away from the bolt head 30 contacts the nylon ring where the anti-reverse part 12 is located. Through friction, bolt 3 is locked, thus preventing bolt 3 from loosening or retracting during operation. This connector has a simple structure, ingenious design, is easy to process, and has low cost. Example

[0038] A connector between a turntable and a support includes a horizontal tube as described in Embodiment 1 or Embodiment 2, and a fixing part disposed on the side of the horizontal tube 1 away from the turntable 4 for fixing the connector to the support 8.

[0039] like Figure 1-2 As shown, the fixing part is a vertically connected longitudinal tube 2 integrally with the horizontal tube 1. The longitudinal tube 2 is located at the end of the horizontal tube 1 away from the turntable 4. The top of the longitudinal tube 2 is closed at the bottom opening. The interior of the longitudinal tube 2 is a receiving cavity. The support 8 is a rod-shaped support. The longitudinal tube 2 is sleeved on the rod-shaped support from the bottom. Example

[0040] A connector between a turntable and a support includes a horizontal tube as described in Embodiment 1 or Embodiment 2, and a fixing part disposed on the side of the horizontal tube 1 away from the turntable 4 for fixing the connector to the support 8. The fixing part is a baffle 10 disposed on the side of the horizontal tube 1 away from the turntable, the radial dimension of the baffle 10 being larger than the radial dimension of the horizontal tube 1, and the support 8 being a plate-shaped support.

[0041] like Figure 5-6 As shown, the fixing part is a baffle 10 disposed on the side of the horizontal tube 1 away from the turntable. The radial dimension of the baffle 10 is larger than the radial dimension of the horizontal tube 1. In this embodiment, the baffle 10 is a circular baffle disposed with the same center as the horizontal tube 1. The support 8 is a plate-shaped support, and the baffle 10 is provided with a connecting part for fixing the connecting member to the plate-shaped support.

[0042] Preferred, such as Figure 5-6 As shown, the connecting part provided on the baffle 10 consists of screw holes 102 spaced around the horizontal tube 1 along the circumference of the baffle 10. The upper end of the plate-shaped support has mounting holes 80 matching the outer diameter of the horizontal tube. During installation, the end of the horizontal tube 1 furthest from the baffle 10 is inserted into the mounting hole 80 of the plate-shaped support. Since the radial dimension of the baffle 10 is larger than that of the horizontal tube 1, the baffle 10 is located on the side of the plate-shaped support furthest from the turntable 4. The baffle 10 is then fixedly connected to the plate-shaped support with screws. The first washer 5, the turntable 4, and the second washer 6 are then sequentially fitted onto the bolt 3. The bolt 3 is then inserted into the horizontal tube 1 from the side of the plate-shaped support closest to the turntable 4, threadedly connected to the horizontal tube 1, and the bolt 3 is tightened, completing the installation of the turntable 4.

[0043] Preferred, such as Figure 7 and 8As shown, the connecting portion provided on the baffle 10 is a limiting protrusion 101 provided on the same side of the horizontal tube 1 on the baffle 10. The plate-shaped support has a receiving portion for the limiting protrusion at a corresponding position. The limiting protrusion 101 ensures that the connector engages with the plate-shaped support, preventing the connector from rotating relative to the plate-shaped support, thus achieving the purpose of fixing the connector. In this embodiment, the limiting protrusion 101 is two hollow cylinders arranged on both sides of the horizontal tube 1, flush with the horizontal tube in the axial direction. This arrangement not only fixes the connector but also saves material, resulting in a lightweight connector. In other embodiments, protrusions of other shapes can also be used.

[0044] In addition, an observation hole can be opened on the side of the baffle 10 away from the turntable. The observation hole can be used to check whether the bolt 3 is tightened in place and whether it is in a locked state. Example

[0045] A connection structure between a turntable and a support includes bolts 3 and connectors as described in Embodiment 1, Embodiment 2, Embodiment 3, or Embodiment 4.

[0046] like Figure 3 or Figure 8 As shown, the outer circumference of the bolt 3 near the head 30 is smooth and is used to install the turntable 4 and the washer. The end away from the head 30 is provided with an external thread that matches the internal thread of the threaded connection part 11. The end of the bolt 3 away from the head 30 passes through the turntable 4 and is threadedly connected to the horizontal tube 1. The turntable 4 is sleeved on the smooth section of the bolt 3 and is rotatably connected to the bolt 3. When the bolt 3 is tightened, the thread of the bolt 3 contacts the anti-retraction part 12, and the anti-retraction part 12 locks the bolt 3 so that it does not retract. At least one first washer 5 is provided between the turntable 4 and the head 30 of the bolt 3 to prevent the turntable 4 from wearing.

[0047] Preferably, in order to prevent wear between the turntable 4 and the connecting parts, at least one second washer 6 is also provided between the turntable 4 and the horizontal tube 1.

[0048] With the above configuration, the turntable 4 is fitted onto the smooth section near the head of the bolt 3, which facilitates the rotation of the turntable 4. Since the turntable 4 is typically made of non-metallic material and is prone to damage, at least one first washer 5 is placed between the bolt head 30 and the turntable 4 to prevent wear. During the rotation of the turntable 4, the first washer 5 distributes the load on the bolt head, ensuring even force distribution on the turntable 4 and protecting it from wear. Furthermore, this connection structure allows the connector to directly lock the bolt 3, eliminating the need for components such as the plane bearing and elastic washer found in existing connection structures. This results in a simpler structure, saves materials, and lowers costs. Example

[0049] A turntable device includes a turntable 4, a pointer 7, a support 8, and the connection structure between the turntable and the support as described in Embodiment 5.

[0050] like Figure 4 As shown, the support 8 is a rod-shaped support, the turntable 4 is connected to the horizontal tube 1 of the connector by bolts, the vertical tube is opened from the lower end and sleeved on the top of the rod-shaped support, and the pointer 7 is sleeved on the head 30 of the bolt 3 by a clamp, thus completing the installation of the turntable device.

[0051] During installation, the gasket 5, turntable 4, and gasket 6 are sequentially placed on the bolt 3. The threaded end of the bolt 3 is screwed into the threaded connection part of the horizontal tube 1 near the turntable. When the external thread of the bolt 3 travels through the internal thread of the threaded connection part 11 to the anti-retraction part 12, the bolt 3 is tightened with force so that the thread of the bolt is in full contact with the anti-retraction part, thereby achieving the purpose of locking the bolt 3 and preventing the bolt 3 from loosening or retracting during operation. Example

[0052] A turntable device includes a turntable 4, a pointer 7, a support 8, and the connection structure between the turntable and the support as described in Embodiment 5.

[0053] like Figure 8 As shown, the support 8 is a plate-shaped support with a mounting hole 80 at its upper end. The connecting horizontal tube extends from the side of the plate-shaped support away from the turntable into the mounting hole 80 to fix the connecting member to the plate-shaped support. On the side of the plate-shaped support closest to the turntable, the first washer 5, the turntable 4, and the second washer 6 are sequentially fitted onto the bolt 3. Then, the threaded end of the bolt 3 is screwed into the horizontal tube 1, connecting it to the horizontal tube 1 threadedly, and the bolt 3 is tightened forcefully to ensure that the thread of the bolt 3 is in full contact with the anti-reverse part 12. Finally, the pointer 7 is fitted onto the head 30 of the bolt 3 through a retainer, completing the installation of the turntable device.

[0054] The beneficial effects of this utility model are as follows: Since the connecting part itself can lock the bolt, there is no need for additional plane bearings and elastic washers to prevent the bolt from loosening and moving back. Therefore, the installation distance of different turntables can be met simply by increasing or decreasing the number of washers 9. The operation is simple, convenient, and low-cost. For example, when installing the turntable 4, if the support is a rod-shaped support, due to the limitation of the legs at the lower end of the support 8, if the user needs to install a larger turntable 4, the turntable 4 must be moved away from the horizontal tube 1. At this time, the distance between the turntable 4 and the horizontal tube 1 can be increased by using a slightly longer bolt 3 and increasing the number of washers 9. When installing a small-sized turntable 4, a slightly shorter bolt 3 and an appropriate reduction in the number of washers 9 can be used to reduce the distance between the turntable 4 and the horizontal tube 1. When the support is a plate-shaped support, the installation distance of the turntable can also be adjusted by increasing or decreasing the number of washers 9. The operation is very simple, requires few types of parts, and is low-cost.

[0055] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, equivalent changes, improvements, and modifications made without departing from the principle of this utility model are all covered within the protection scope of this utility model.

Claims

1. A connector between a turntable and a support, characterized in that: The connector includes a horizontal tube (1), the inner wall of which is provided with a threaded connection part (11) at one end near the turntable (4), and a backstop part (12) for preventing the bolt (3) from retracting at the other end of the threaded connection part (11) away from the turntable (4).

2. The connector between the turntable and the support according to claim 1, characterized in that: The horizontal tube (1) is a plastic tube, and the threaded connection part (11) is an internal thread or internal threaded tube or nut fixed on the inner wall of the horizontal tube (1). The length of the threaded connection part (11) is less than the length of the horizontal tube (1). The anti-reverse part is a smooth inner tube wall extending from the end of the threaded connection part (11) away from the turntable (4) to the end of the horizontal tube (1) away from the turntable (4). The space enclosed by the threaded connection part (11) is connected to the space enclosed by the anti-reverse part (12).

3. The connector between the turntable and the support according to claim 2, characterized in that: The inner wall surface of the horizontal tube (1) where the anti-reverse part (12) is located is flush with the middle of the tooth root to tooth crest of the threaded connection part (11).

4. The connector between the turntable and the support according to claim 1, characterized in that: The threaded connection part (11) is an internally threaded tube or nut fixed on the inner wall of the horizontal tube (1), and the anti-reverse part (12) is a nylon ring provided on the end of the internally threaded tube or nut away from the turntable (4).

5. The connector between the turntable and the support according to claim 1, characterized in that: The connector also includes a fixing part disposed on the side of the horizontal tube (1) away from the turntable for fixing the connector to the support.

6. The connector between the turntable and the support according to claim 5, characterized in that: The fixing part is a baffle (10) provided on the side of the horizontal tube (1) away from the turntable. The radial dimension of the baffle (10) is larger than the radial dimension of the horizontal tube (1). The support (8) is a plate-shaped support. The baffle (10) is provided with a connecting part that fixes the connecting member to the plate-shaped support.

7. The connector between the turntable and the support according to claim 5, characterized in that: The fixing part is a vertically connected longitudinal tube (2) integrally with the horizontal tube (1). The longitudinal tube (2) is located at the end of the horizontal tube (1) away from the turntable (4). The support (8) is a rod-shaped support. The longitudinal tube (2) is sleeved on the rod-shaped support.

8. A connection structure between a turntable and a support, characterized in that: Includes a bolt (3) and a connector as described in any one of claims 1-7. The bolt (3) has a smooth outer circumference at one end near the head (30) and an external thread at the other end away from the head (30). The end of the bolt (3) away from the head (30) passes through a turntable (4) and is threadedly connected to the horizontal tube (1). The turntable (4) is fitted onto the smooth section of the bolt (3) and is rotatably connected to the bolt (3). At least one first washer (5) is provided between the turntable (4) and the head (30) of the bolt (3) to prevent wear of the turntable (4). When the bolt (3) is tightened, the thread of the bolt (3) contacts the anti-retraction part, and the anti-retraction part locks the bolt (3) in place so that it does not retract.

9. The connection structure between the turntable and the support according to claim 8, characterized in that: At least one second washer (6) is provided between the turntable (4) and the horizontal tube (1) to prevent wear on the turntable (4).

10. A turntable device, characterized in that: It includes a turntable (4), a pointer (7), a support (8), and the connection structure between the turntable and the support as described in claim 8.

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