Automatic reset turntable

Abstract

The invention provides an automatic reset rotating disc. The automatic reset rotating disc comprises a first rotating disc, a second rotating disc, a rotating assembly and a reset piece. The first turntable can rotate relative to the second turntable; the rotating assembly comprises a center shaft, an eccentric shaft and an eccentric rotating ring, the center shaft penetrates through the centers of the first rotating disc and the second rotating disc, the center shaft is sleeved with the eccentric shaft, and the center of the eccentric shaft does not coincide with the center of the center shaft; a pull pin is arranged on the eccentric rotating ring, a stroke hole extending in the radial direction is formed in the first rotating disc, and the pull pin penetrates through the stroke hole and extends to the position above the first rotating disc. The pull pin can move in the stroke hole in the length direction of the stroke hole. When the pull pin is located at the position closest to or farthest from the center shaft, the first rotating disc is in an initial state. Therefore, the rotating turntable can be accurately reset to the initial position.

Description

Technical Field

[0001] The present invention relates to the technical field of turntables, and in particular to an automatic resetting turntable. Background Art

[0002] There are chairs on the market that use turntables to achieve 360-degree seat rotation. A Chinese invention application (Application No. 202410261410.5) proposes an automatically reset turntable. After the second disc rotates relative to the first disc, the spring force resets the second disc to its initial position.

[0003] However, there are problems with this implementation. When the seat is rotated and reset, the spring continues to do positive work during the reset process to the initial position, and the spring's reset force (the circumferential component of the spring's elastic force) is small near the initial position, resulting in a faster reset to the initial position and continuous periodic oscillation. When the swing finally stops, because the system friction force cannot be zero, the stopping position is usually not the initial position, but the position where the elastic reset force of the spring and the static friction force of the system are balanced. In fact, the static friction force of the system is not constant, and this position is an unfixed position near the initial position, resulting in inconsistent seat reset positions. When the turntable is used on rows of bar stools, for example, it is easy to cause the seat angle reset positions to be messy after the guests leave the bar stools, affecting the cleanliness of the environment.

[0004] Therefore, there are still problems to be solved in the prior art. Summary of the Invention

[0005] The main purpose of the present invention is to provide an automatic reset turntable, which is intended to enable the rotating turntable to accurately reset to an initial position.

[0006] To achieve the above-mentioned purpose, the present invention proposes an automatic reset turntable, comprising a first turntable, a second turntable, a rotating assembly and a reset member; the first turntable can rotate relative to the second turntable; the rotating assembly includes a central shaft, an eccentric shaft and an eccentric rotating ring, the central shaft is arranged through the centers of the first turntable and the second turntable, the eccentric shaft is sleeved outside the central shaft, and the center of the eccentric shaft does not coincide with the center of the central shaft; the eccentric shaft is circumferentially fixed to the second turntable; the eccentric rotating ring is rotatably arranged outside the eccentric shaft and can rotate around the center of the eccentric shaft; a pull pin is provided on the eccentric rotating ring, the first turntable is formed with a radially extending stroke hole, the pull pin is passed through the stroke hole and extends above the first turntable; the pull pin can move in the stroke hole along the length direction of the stroke hole; the reset member is fixed to the pull pin and applies a reset force to the pull pin toward or away from the central axis; when the pull pin is at the closest or farthest position from the central axis, the first turntable is in an initial state.

[0007] Preferably, the eccentric rotating ring includes a first convex portion, which protrudes horizontally in a direction away from the ring center; and the pull pin is provided on the first convex portion.

[0008] Preferably, a groove is formed in the middle of the first rotating disk and / or the second rotating disk; when the first protrusion rotates with the pull pin, the rotation circumference of the first protrusion is located in the groove.

[0009] Preferably, the reset member is configured as a spring, a fixing portion is provided on the first turntable, one end of the spring is fixed to the pull pin, and the other end of the spring is fixed to the fixing portion.

[0010] Preferably, a bearing is provided between the eccentric shaft and the eccentric rotating ring.

[0011] Preferably, it further comprises a positioning structure, which is arranged at the travel hole.

[0012] Preferably, the positioning structure is arranged on the path of the pull pin and holds the pull pin when the pull pin is located at the position closest to or farthest from the central axis.

[0013] Preferably, the positioning structure is riveted to the first turntable.

[0014] Preferably, the positioning structure is arranged at the end of the travel hole close to or away from the central axis and is configured as a positioning clamp, and the positioning clamp includes two clamping arms for clamping the pull pin.

[0015] Preferably, a second protrusion is formed on the clamping arm, and the second protrusion protrudes toward the other clamping arm.

[0016] The automatic reset turntable provided in the embodiment of the present application includes a first turntable, a second turntable, a rotating assembly and a reset member; the first turntable can rotate relative to the second turntable; the rotating assembly includes a central shaft, an eccentric shaft and an eccentric rotating ring, the central shaft is arranged through the center of the first turntable and the second turntable, the eccentric shaft is sleeved outside the central shaft, and the center of the eccentric shaft does not coincide with the center of the central shaft; the eccentric shaft is circumferentially fixed to the second turntable; the eccentric rotating ring is rotatably arranged outside the eccentric shaft and can rotate around the center of the eccentric shaft; a pull pin is provided on the eccentric rotating ring, the first turntable is formed with a radially extending stroke hole, the pull pin is arranged through the stroke hole and extends above the first turntable; the pull pin can move in the stroke hole along the length direction of the stroke hole; the reset member is fixed to the pull pin and applies a reset force to the pull pin toward or away from the central axis; when the pull pin is at the closest or farthest position from the central axis, the first turntable is in the initial state. In this way, the rotating turntable can be accurately reset to the initial position. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of an embodiment of an automatic reset turntable of the present invention;

[0019] Figure 2 An exploded view of an embodiment of the automatic reset turntable of the present invention;

[0020] Figure 3 A schematic diagram of a first turntable of an embodiment of an automatic reset turntable of the present invention;

[0021] Figure 4 A schematic diagram of a positioning structure of an automatic reset turntable according to an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of an eccentric rotating ring and a pull pin of an embodiment of an automatic reset turntable of the present invention;

[0023] Figure 6 A schematic diagram of an eccentric shaft of an embodiment of an automatic reset turntable of the present invention;

[0024] Figure 7 A schematic diagram of the central axis of an automatic reset turntable according to an embodiment of the present invention.

[0025] Description of Figure Numbers:

[0026] Label name Label name 100 First turntable 331 first convex part 110 Travel hole 400 reset piece 120 Fixed part 500 groove 200 Second turntable 600 bearings 300 Rotating components 700 Positioning structure 310 Central axis 710 Clamping arm 320 Eccentric shaft 711 second convex part 330 Eccentric rotating ring 800 Pull pin

[0027] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] There are chairs on the market that use turntables to achieve 360-degree seat rotation. A Chinese invention application (Application No. 202410261410.5) proposes an automatically reset turntable. After the second disc rotates relative to the first disc, the spring force resets the second disc to its initial position.

[0032] However, there are problems with this implementation. When the seat is rotated and reset, the spring continues to do positive work during the reset process to the initial position, and the spring's reset force (the circumferential component of the spring's elastic force) is small near the initial position, resulting in a faster reset to the initial position and continuous periodic oscillation. When the swing finally stops, because the system friction force cannot be zero, the stopping position is usually not the initial position, but the position where the elastic reset force of the spring and the static friction force of the system are balanced. In fact, the static friction force of the system is not constant, and this position is an unfixed position near the initial position, resulting in inconsistent seat reset positions. When the turntable is used on rows of bar stools, for example, it is easy to cause the seat angle reset positions to be messy after the guests leave the bar stools, affecting the cleanliness of the environment.

[0033] In order to solve the above problems, this patent provides an automatic reset turntable, which aims to enable the rotating turntable to accurately reset to its initial position.

[0034] For ease of understanding, the specific implementation of the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 The automatic reset turntable includes a first turntable 100, a second turntable 200, a rotating assembly 300 and a reset member 400; the first turntable 100 can rotate relative to the second turntable 200; the rotating assembly 300 includes a central shaft 310, an eccentric shaft 320 and an eccentric rotating ring 330, the central shaft 310 is arranged at the center of the first turntable 100 and the second turntable 200, the eccentric shaft 320 is sleeved outside the central shaft 310, and the center of the eccentric shaft 320 does not coincide with the center of the central shaft 310; the eccentric shaft 320 is circumferentially fixed to the second turntable 200; the eccentric rotating ring 330 is rotatably arranged on the eccentric shaft 320 The eccentric rotating ring 330 is provided with a pull pin 800, and the first turntable 100 is formed with a radially extending stroke hole 110, and the pull pin 800 is passed through the stroke hole 110 and extends to the top of the first turntable 100; the pull pin 800 can move in the stroke hole 110 along the length direction of the stroke hole 110; the reset member 400 is fixed to the pull pin 800 and applies a reset force to the pull pin 800 toward the central axis 310 or away from the central axis 310; when the pull pin 800 is located at the closest or farthest position from the central axis 310, the first turntable 100 is in an initial state. It should be noted that the eccentric rotating ring 330 is rotatably disposed outside the eccentric shaft 320, and the inner wall of the through-hole of the eccentric rotating ring 330 can either fit in contact with the outer wall of the eccentric shaft 320 or not (for example, a bearing 600 is provided between the eccentric rotating ring 330 and the eccentric shaft 320 as described below). Similarly, the eccentric shaft 320 is sleeved outside the central shaft 310, and the inner wall of the through-hole of the eccentric shaft 320 can either fit in contact with the outer wall of the central shaft 310 or not.

[0036] In this embodiment, the position of the first turntable 100 is set as the initial position when the pull pin 800 is located at the position closest to or farthest from the central axis 310; when the pull pin 800 is located at the position closest to the central axis 310, the position of the first turntable 100 is set as the initial position, and the reset force provided by the reset member is a force that makes the pull pin 800 close to the central axis 310; when the pull pin 800 is located at the position farthest from the central axis 310, the position of the first turntable 100 is set as the initial position, and the reset force provided by the reset member is a force that makes the pull pin 800 away from the central axis 310. When there is no artificial force on the first turntable 100, the restoring force applied by the restoring member 400 on the pull pin 800 will cause the pull pin 800 and the eccentric rotating ring 330 to rotate. During the rotation of the pull pin 800, the pull pin 800 moves in the travel hole 110; during the movement of the pull pin 800 to the position closest to or farthest from the central axis 310, the sliding friction between the pull pin 800 and the side wall of the travel hole 110 does negative work; when the mechanical energy of the system is consumed to a certain extent, the pull pin 800 moves to the position closest to or farthest from the central axis 310, the restoring force cannot overcome the friction, and thus the pull pin 800 cannot move in the travel hole 110. When the pull pin 800 moves in the travel hole 110, the mechanical energy of the system is consumed, and the first turntable 100 also stops rotating along with the pull pin 800. On this basis, in order to enhance the positioning effect, it can be set so that when the pull pin 800 moves to the position closest to or farthest from the central axis 310, the pull pin 800 is located at the end of the travel hole 110, so as to increase the contact area between the pull pin 800 and the side wall of the travel hole 110 (when the pull pin 800 is located in the middle of the travel hole 110, the pull pin contacts the left side wall and / or right side wall of the travel hole 110; when the pull pin 800 is located at the end of the travel hole 110, the pull pin contacts the left side wall and / or right side wall of the travel hole 110, as well as the end side wall). In this way, when the pull pin 800 is at the position closest to or farthest from the central axis 310, the mechanical energy is consumed more, which is conducive to more accurately resetting the rotating turntable to the initial position.

[0037] It should be noted that there are many ways to implement the pull pin 800 on the eccentric rotating ring 330. This embodiment provides the following implementations, please refer to Figure 5 The eccentric rotating ring 330 includes a first protrusion 331 that protrudes horizontally away from the ring center. The pull pin 800 is mounted on the first protrusion 331. The travel of the pull pin 800 is determined by the degree of eccentricity of the eccentric shaft 320. Therefore, the further the pull pin 800 is from the center, the further its closest end of travel is from the center. This implementation allows the travel hole 110 adapted for this implementation to be closer to the edge of the first turntable 100, increasing the structural strength of the central portion of the first turntable 100.

[0038] On the basis of the above implementation, in order to make the first turntable 100 rotate smoothly, a ball bearing is provided between the first turntable 100 and the second turntable 200. This method makes the distance between the first turntable 100 and the second turntable 200 smaller. Therefore, there is a problem of how to make the first protrusion 331 rotate between the first turntable 100 and the second turntable 200. In order to solve the above problem, this embodiment provides the following implementation, please refer to Figure 2 A groove 500 is formed in the middle of the first rotating disk 100 and / or the second rotating disk 200; when the first protrusion 331 rotates with the pull pin 800, the rotation circumference of the first protrusion 331 is located in the groove 500. This implementation ensures that the rotation circumference of the first protrusion 331 (i.e., the motion trajectory of the first protrusion 331) is located in the groove 500, so that it will not be disturbed during rotation.

[0039] It should be noted that the reset element 400 has multiple implementations. This embodiment provides the following implementations. Figure 1 The reset member 400 is configured as a spring, a fixing portion 120 is provided on the first turntable 100 , one end of the spring is fixed to the pull pin 800 , and the other end of the spring is fixed to the fixing portion 120 .

[0040] It should be noted that, in order to make the first rotating disk 100 rotate more smoothly, this embodiment provides the following implementation method, please refer to Figure 2 A bearing 600 is provided between the eccentric shaft 320 and the eccentric rotating ring 330. This implementation can reduce the sliding friction force on the eccentric rotating ring 330, making the eccentric rotating ring 330 rotate more smoothly. In addition, the first rotating disk 100 also rotates more smoothly along with the pull pin 800 provided on the eccentric rotating ring 330.

[0041] It should be noted that, in order to further ensure that the turntable can be accurately reset to the initial position, this embodiment provides the following implementation method, please refer to Figure 1 and Figure 2 , further comprising a positioning structure 700, which is disposed at the travel hole 110. The positioning structure 700 can position the pull pin 800 when the first rotary disk 100 is reset to its initial position.

[0042] Based on the above implementation, the positioning structure 700 has multiple implementations. This embodiment provides the following two implementations. Figure 1-3The positioning structure 700 is disposed at the end of the travel hole 110, either close to or far from the central axis 310, and is configured as a positioning clamp. The positioning clamp includes two clamping arms 710 for clamping the pull pin. When the pull pin 800 is at the end of the travel hole 110 and the first rotary disk 100 is in its initial position, this implementation effectively enhances the positioning effect of the pull pin 800, thereby accurately resetting the first rotary disk 100. In a second embodiment, the positioning structure 700 is disposed in the path of the pull pin 800 and holds the pull pin 800 when it is closest to or farthest from the central axis 310. Compared with the first implementation method, this implementation method can not only effectively enhance the positioning effect of the pull pin 800 to achieve accurate resetting of the first turntable 100, but also decelerate the pull pin 800 when the pull pin 800 moves to the position closest to or farthest from the center axis 310 (for example, the positioning structure 700 is set as a spring clip, and the first contact with the spring clip during the resetting process of the pull pin 800 has a deceleration effect, and the second contact with the spring clip has a clamping effect).

[0043] For the above method 1, please refer to Figure 4 A second protrusion 711 is formed on the clamping arm 710, and the second protrusion 711 protrudes toward the other clamping arm 710. This implementation makes it difficult for the pull pin 800 located between the two clamping arms 710 to leave, further ensuring that the pull pin 800 does not rotate when no manual rotation force is applied.

[0044] It should be noted that there are many ways to implement the positioning structure 700 at the position closest to the travel hole 110 and the central axis 310. This embodiment provides the following implementation methods, please refer to Figure 1 and Figure 4 The positioning structure 700 is riveted to the first turntable 100 .

[0045] In summary, the automatic reset turntable provided in the embodiment of the present application includes a first turntable 100, a second turntable 200, a rotating assembly 300 and a reset member 400; the first turntable 100 can rotate relative to the second turntable 200; the rotating assembly 300 includes a central shaft 310, an eccentric shaft 320 and an eccentric rotating ring 330, the central shaft 310 is arranged at the center of the first turntable 100 and the second turntable 200, the eccentric shaft 320 is sleeved outside the central shaft 310, and the center of the eccentric shaft 320 does not coincide with the center of the central shaft 310; the eccentric shaft 320 is circumferentially fixed to the second turntable 200; the eccentric rotating ring 330 is rotatable The eccentric rotating ring 330 is disposed outside the eccentric shaft 320 and can rotate about the center of the eccentric shaft 320. A pull pin 800 is provided on the eccentric rotating ring 330. The first rotating disk 100 is formed with a radially extending travel hole 110. The pull pin 800 is inserted into the travel hole 110 and extends above the first rotating disk 100. The pull pin 800 can move within the travel hole 110 along the length of the travel hole 110. The reset member 400 is fixed to the pull pin 800 and applies a reset force to the pull pin 800 toward or away from the central axis 310. When the pull pin 800 is at its closest or furthest position from the central axis 310, the first rotating disk 100 is in its initial state. This allows the rotating rotating disk to accurately return to its initial position.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An automatic reset turntable, characterized in that: It includes a first turntable, a second turntable, a rotating assembly and a reset member; the first turntable can rotate relative to the second turntable; The rotating assembly includes a central shaft, an eccentric shaft, and an eccentric rotating ring. The central shaft is provided through the center of the first rotating disk and the second rotating disk. The eccentric shaft is sleeved outside the central shaft, and the center of the eccentric shaft does not coincide with the center of the central shaft. The eccentric shaft is circumferentially fixed to the second rotating disk. The eccentric rotating ring is rotatably arranged outside the eccentric shaft and can rotate around the center of the eccentric shaft; a pull pin is provided on the eccentric rotating ring, and the first rotating disk is formed with a radially extending stroke hole, and the pull pin is passed through the stroke hole and extends above the first rotating disk; the pull pin can move in the stroke hole along the length direction of the stroke hole; The reset member is fixed to the pull pin and applies a reset force to the pull pin in a direction toward or away from the central axis; When the pull pin is located at the position closest to or farthest from the central axis, the first turntable is in an initial state.

2. The automatic reset turntable according to claim 1, characterized in that: The eccentric rotating ring includes a first convex portion, which protrudes in a horizontal direction away from the ring center; The pull pin is arranged on the first protrusion.

3. The automatic reset turntable according to claim 2, characterized in that: A groove is formed in the middle of the first turntable and / or the second turntable; When the first protrusion rotates along with the pull pin, the rotation circumference of the first protrusion is located in the groove.

4. The automatic reset turntable according to claim 1, characterized in that: The reset member is configured as a spring, a fixing portion is provided on the first rotating disk, one end of the spring is fixed to the pull pin, and the other end of the spring is fixed to the fixing portion.

5. The automatic reset turntable according to claim 1, characterized in that: A bearing is provided between the eccentric shaft and the eccentric rotating ring.

6. The automatic reset turntable according to any one of claims 1 to 5, characterized in that: It also includes a positioning structure, which is arranged at the travel hole.

7. The automatic reset turntable according to claim 6, characterized in that: The positioning structure is arranged on the path of the pull pin and holds the pull pin when the pull pin is located at the position closest to or farthest from the central axis.

8. The automatic reset turntable according to claim 6, characterized in that: The positioning structure is riveted to the first turntable.

9. The automatic reset turntable according to claim 6, wherein: The positioning structure is arranged at the end of the travel hole close to or away from the central axis and is configured as a positioning clamp. The positioning clamp includes two clamping arms for clamping the pull pin.

10. The automatic reset turntable according to claim 9, characterized in that: A second convex portion is formed on the clamping arm, and the second convex portion protrudes toward the other clamping arm.

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