Flexible position control mechanism

Abstract

The present invention discloses a position restriction mechanism. [Solution] The device includes a base, a first bearing, a rotating base and a position control assembly, the base includes a base body and a through hole passing through it, the first bearing is attached to the through hole, the rotating base includes a rotating base body inserted into the first bearing and a lever formed by protruding and extending from its periphery, the position control assembly and the lever are provided on the same side of the base body, the position control assembly includes a slider slidably provided on the base body, a position control portion formed by protruding and extending from the side of the slider close to the rotating base, and two elastic members fixed to both ends of the slider, and a position control surface is provided on both sides of the base body that correspond to and face the position control portion along the circumferential direction, and the lever rotates to the position control portion until it presses against the position control portion and moves and drives the position control portion, whereby the position control portion abuts against the position control surface on the corresponding side to perform position control.

Description

[Technical field]

[0001] The present invention relates to the technical field of position regulation of a rotating table, and in particular to a flexible position regulation mechanism. [Background technology]

[0002] With the rapid development of mechanical technology, more and more industries adopt turntables to realize mechanical rotation operations.

[0003] Currently, in the prior art, there are relatively few rotational positioning structures for a turntable of ±180° (positive or negative 180°), and most rotational positioning structures are unable to perform rotational positioning of structures at +180° and -180° simultaneously. The rotational positioning structures for other applications all adopt complex mechanical position control such as spiral positioning or a structure in which a driven slider matches a buffer, in cooperation with electrical position control or software position control to protect the rotation mechanism from abnormal rotation.

[0004] However, in the above applications, the rotation positioning structure of the turntable requires many and complicated operations, occupies a large space, is relatively unsuitable for various types of turntables, and mostly relies solely on electrical position control to achieve ±180° rotation positioning. As such, there is a potential risk of electrical component failure, and the application reliability of the turntable is low.

[0005] Therefore, there is a need to provide a flexible position restriction mechanism to solve the above problems. Summary of the Invention [Problem to be solved by the invention]

[0006] The technical problem to be solved by the present invention is how to provide a position restriction mechanism that requires fewer operations, has a simple structure, occupies a small space, is highly reliable, and effectively reduces noise. [Means for solving the problem]

[0007] In order to solve the above technical problems, the present invention provides a flexible position restriction mechanism, which is used to realize a position restriction of 180° forward and reverse rotation, the flexible position restriction mechanism includes a base, a first bearing, a rotating base, and a position restriction assembly; The base includes a base body and a through hole that penetrates the base body and has a circular shape; a first bearing mounted in the through hole and forming a fixed connection with the base body; The rotating table includes a rotating table main body that is inserted into the first bearing, forms a fixed connection with the first bearing, and has an annular shape, and a lever that is formed by protruding and extending from a periphery of the rotating table main body, and the rotating table main body forms a rotating connection with the base main body via the first bearing, The position restriction assembly and the lever are installed on the same side of the base body, The position restriction assembly includes a slider slidably provided on the base body, a position restriction portion formed by projecting and extending from a side of the slider adjacent to the rotating base, and two elastic members installed along the sliding direction of the slider and fixed to both ends of the slider, respectively, one end of each of the two elastic members remote from the slider being fixedly connected to the base body, the position restriction unit is located on a straight line on which the same diameter of the rotating base body is located together with the lever when the position restriction unit is in an initial position, and the position restriction unit is installed at a distance from the rotating base body; Two position restriction surfaces are provided on both sides of the through hole in the base body that correspond to and face the position restriction portion along the circumferential direction of the through hole, the two positions being equally spaced from the position restriction portion, When the lever rotates clockwise or counterclockwise to the position regulating portion until it is pressed against the position regulating portion and moves and drives the position regulating portion, the lever rotates 180 degrees and the position regulating portion abuts against the position regulating surface on the corresponding side to perform position regulation.

[0008] Preferably, the base further includes a circular mounting groove formed inwardly from the base body, a slide groove formed inwardly from the base body and spaced from the mounting groove, and a connection groove formed inwardly from the base body and communicating between the mounting groove and the slide groove, the through hole being formed penetrating from a groove bottom of the mounting groove to the other side, the slider being slidably provided in the slide groove, and the position regulating portion extending from the connection groove to the mounting groove, The two opposing groove side surfaces of the connection groove are the two position restriction surfaces located on both opposing sides of the position restriction portion.

[0009] Preferably, the flexible position control mechanism further includes a cover plate that is attached to the base body and at the same time completely covers the mounting groove, the slide groove and the connection groove, and a through hole is drilled at a position of the cover plate corresponding to the through hole.

[0010] Preferably, an inwardly recessed guide groove is provided at each end of the slider, and the two elastic members are partially inserted into the two guide grooves, respectively.

[0011] Preferably, an inwardly recessed fixing groove is provided at a position of each of the base body and the cover plate that is away from the slider of the two elastic members, and one end of each of the two elastic members that is away from the slider is fixed to the corresponding fixing groove.

[0012] Preferably, a through groove that abuts against the cover plate and is recessed inward is provided on the side of the slider close to the cover plate, the through groove extending along the sliding direction of the slider, and a protruding portion that protrudes and abuts against the bottom of the slide groove is provided on the side of the slider away from the cover plate, the protruding portion extending along the sliding direction of the slider.

[0013] Preferably, the base body has an inwardly recessed groove at a position corresponding to the edge of the cover plate, and the cover plate is fitted over the groove and fixed by a plurality of screws.

[0014] Preferably, the surface of the slider is subjected to a diamond-like carbon treatment.

[0015] Preferably, the rotating table main body includes a ring-shaped main body portion and a cylindrical extension portion that protrudes and extends from the inner edge of the main body portion along its axial direction, the extension portion being inserted and fixed into the first bearing, and the lever is formed by protruding and extending outward from the periphery of the main body portion along its radial direction.

[0016] Preferably, the elastic member is a spring. Effect of the Invention

[0017] In comparison with the related art, the flexible position control mechanism of the present invention has a lever installed on the periphery of the rotating base, and a position control assembly consisting of a slider slidably mounted on the base body, a position control section formed by protruding and extending from the side of the slider closest to the rotating base, and two elastic members installed along the sliding direction of the slider and fixed to both ends of the slider, each of which has one end away from the slider of each of the two elastic members fixedly connected to the base body, and two position control surfaces equally spaced from the slider are installed on both sides facing the circumferential direction of the through hole in the base body and corresponding to the position control section. In this way, when the rotating base rotates nearly 180° and the lever is pressed against the position restriction portion and the position restriction portion is driven to move, the position restriction portion abuts against the position restriction surface on the corresponding side to implement position restriction, i.e., the 180° position restriction of the rotating base is realized, and when resetting, the lever disengages from the position restriction portion, and the position restriction portion springs back due to the elastic force of the elastic members on both ends of the slider to implement resetting, and the slider does not move back and forth on the base body, reducing noise generation and providing excellent stability. In addition, the flexible position restriction mechanism of the present invention employs a mechanical position restriction, which requires fewer operations, is simple in structure, occupies a small space, and is highly reliable. [Brief description of the drawings]

[0018] In order to more clearly explain the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments. However, the drawings described below are only some embodiments of the present invention, and it is obvious to those skilled in the art in the technical field to which the present invention belongs that they can obtain other drawings based on these drawings without any creative work. [Figure 1] FIG. 2 is a schematic perspective view showing a configuration of a flexible position restriction mechanism according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an exploded view showing a schematic overall structure of a flexible position restriction mechanism according to an embodiment of the present invention. [Diagram 3] 2 is a cross-sectional view taken along line NN shown in FIG. [Figure 4] FIG. 2 is an exploded view showing a schematic structure of a portion of a flexible position restriction mechanism according to an embodiment of the present invention. [Diagram 5] 5A and 5B are schematic diagrams illustrating a configuration of a slider in a flexible position restriction mechanism according to an embodiment of the present invention. [Figure 6] 1 is a schematic plan view of a position restriction mechanism according to an embodiment of the present invention when a rotating table is in an initial position. FIG. [Figure 7] 11 is a schematic plan view of the position restriction mechanism according to the embodiment of the present invention when the rotating base is rotated forward by 180° to perform position restriction. FIG. [Figure 8] 11 is a schematic plan view of the position restriction mechanism according to the embodiment of the present invention when the rotating table is rotated 180° to perform position restriction. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments that a person skilled in the art can obtain without creative labor are all included in the protection scope of the present invention.

[0020] The embodiment of the present invention provides a flexible position restriction mechanism 100, which includes a base 1, a first bearing 2, a rotating base 3 and a position restriction assembly 4, as shown in FIGS.

[0021] Specifically, the flexible position restriction mechanism 100 is used to realize position restriction of the rotation table 3 in forward and reverse rotation (clockwise or counterclockwise) of 180°.

[0022] The base 1 includes a base body 11 and a through hole 12 passing through the base body 11 and having a circular shape, and the first bearing 2 is mounted in the through hole 12 and forms a fixed connection with the base body 11 .

[0023] The rotating table 3 includes a rotating table main body 31 that is inserted into the first bearing 2, forms a fixed connection with the first bearing 2, and has a circular shape, and a lever 32 that is formed by extending and protruding from the peripheral edge of the rotating table main body 31, and the rotating table main body 31 forms a rotating connection with the base body 11 via the first bearing 2.

[0024] The position restriction assembly 4 and the lever 32 are installed on the same side of the base body 11, and the position restriction assembly 4 includes a slider 41 slidably provided on the base body 11, a position restriction portion 42 formed by protruding and extending from the side of the slider 41 close to the rotating base 3, and two elastic members 43 installed along the sliding direction of the slider 41 and fixed to both ends of the slider 41, one end of each of the two elastic members 43 away from the slider 41 is fixedly connected to the base body 11, and when in the initial position, the position restriction portion 42 is located on a straight line along which the same diameter of the rotating base body 31 is located together with the lever 32, and the position restriction portion 42 is installed at a distance from the rotating base body 31. In addition, two position restriction surfaces 13 are installed on both sides of the through hole 12 in the base body 11 that face each other along the circumferential direction and correspond to the position restriction portion 42, and are equally spaced from the position restriction portion 42.

[0025] When the position restricting portion 42 is in the initial position, i.e., when the rotating table 3 is in the initial position, the position restricting portion 42 and the lever 32 are located on opposite sides of the rotating table 3, and the lever 32 rotates clockwise or counterclockwise to the position restricting portion 42 until the lever 32 is pressed against the position restricting portion 42 and moves and drives the position restricting portion 42, whereby the position restricting portion 42 abuts against the position restricting surface 13 on the corresponding side to restrict the position. When the lever 32 is reset, i.e., when the reset 32 ​​returns to the initial position, the lever 32 is released from the position restricting portion 42, and the position restricting portion 42 springs back and resets due to the elastic force of the elastic members 43 on both ends of the slider 41, and the slider 41 does not reciprocate on the base body 11, thereby reducing noise generation and providing excellent stability.

[0026] In this embodiment, the base 1 further includes a mounting groove 14 that is formed inwardly from the base body 11 and has a circular shape, a slide groove 15 that is formed inwardly from the base body 11 and has an elongated shape at a distance from the mounting groove 14, and a connection groove 16 that is formed inwardly from the base body 11 and connects the mounting groove 14 and the slide groove 15, the through hole 12 is formed penetrating from the bottom of the mounting groove 14 to the other side, the slider 41 is slidably provided in the slide groove 15, and the position regulating portion 42 extends from the connection groove 16 to the mounting groove 14. By installing in this manner, the plane of the rotating table 3, the slider 41 and the position control part 42 away from the base body 11 can be closer to the plane of the base body 11, or can be parallel to the plane of the base body 11, or can be lower than the plane of the base body 11, thereby reducing the overall height of the flexible position control mechanism 100, making its occupied space smaller, and making it more adaptable.

[0027] The two opposing groove side surfaces of the connection groove 16 function as two position restriction surfaces 13 located on both opposing sides of the position restriction portion 42. By installing them in this manner, not only can the overall height of the flexible position restriction mechanism 100 be reduced, but also the position restriction surfaces 13 can be easily formed. Of course, it is not necessary to install the mounting groove 14, the slide groove 15, and the connection groove 16 according to actual needs, but it is necessary to install protruding structures extending protrudingly on both sides of the through hole 12 in the base body 11 that face each other along the circumferential direction and correspond to the position restriction portion 42, so that the position restriction surfaces 13 are formed on the planes of both sides that face each other and correspond to the position restriction portion 42 of the two protruding structures.

[0028] When no external force is applied, the slider 41 is held at the middle of the slide groove 15 by the elastic force of the two elastic members 43, and the slider 41 forms a T-shaped structure with the position restricting part 42. When installed in this manner, the two elastic members 43 of the same length can better control the attitudes of the slider 41 and the position restricting part 42, preventing them from vibrating during springback, reducing damage caused by their collision with the base body 11, and reducing noise generation.

[0029] The surface of the slider 41 is treated with diamond-like carbon (DLC). Installing the slider 41 in this manner effectively improves the hardness and wear resistance of the slider 41, thereby reducing the coefficient of friction between the slider 41 and the base body 11, improving the sliding performance of the slider 41, and reducing the rotational moment of the rotating table 3.

[0030] The elastic member 43 is a spring. Of course, according to actual needs, the elastic member 43 can further select a part having elastic recovery performance, such as a C-shaped spring plate, an S-shaped spring plate, etc.

[0031] The rotating table main body 31 includes a ring-shaped main body portion 311 and a cylindrical extension portion 312 that protrudes and extends from the inner edge of the main body portion 311 along its axial direction, and the extension portion 312 is inserted and fixed to the first bearing 2, and the lever 32 is formed by protruding and extending outward from the periphery of the main body portion 311 along its radial direction. By installing in this manner, the rotating table 3 can be made hollow, making it easy for the wire harness to pass through and avoiding the problem of the wire harness being excessively twisted when the rotating table 3 rotates. Here, the extension portion 312 is inserted into the first bearing 2 and passes through the through hole 12.

[0032] The flexible position restriction mechanism 100 further includes a cover plate 5 that is installed on the base body 11 and at the same time completely covers the mounting groove 14, the slide groove 15 and the connection groove 16, and a through hole 51 is drilled in the cover plate 5 at a position corresponding to the through hole 12. By installing them in this manner, the cover plate 5 protects the rotating table 3 in the mounting groove 14, the slider 41 in the slide groove 15 and the position restriction part 42 in the connection groove 16, and prevents them from being exposed and causing potential safety risks.

[0033] The base body 11 has an inwardly recessed groove 18 at a position corresponding to the edge of the cover plate 5, and the cover plate 5 is covered by the groove 18 and fixed by a number of screws. By installing in this manner, the plane of the cover plate 5 away from the base body 11 can be closer to the plane of the base body 11, or parallel to the base body, or lower than the plane of the base body 11. This reduces the overall height of the flexible position restriction mechanism 100, reduces the space it occupies, and improves compatibility.

[0034] The slider 41 has guide grooves 411 recessed inward at both ends thereof, and the two elastic members 43 are partially inserted into the guide grooves 411 at both ends of the slider 41, and the base body 11 and the cover plate 5 have fixing grooves 17 recessed inward at positions corresponding to the ends of the two elastic members 43 that are distant from the slider 41, and the ends of the two elastic members 43 that are distant from the slider 41 are fixed to the corresponding fixing grooves 17. That is, the base body 11 has two fixing grooves 17, and the cover plate 5 has two fixing grooves 17. This arrangement not only improves the fixation of the elastic member 43, but also provides a guide for the movement path of the elastic member 43, and facilitates the control of the posture of the elastic member 43, thereby improving the movement efficiency of the elastic member 43.

[0035] The side of the slider 41 close to the cover plate 5 is provided with a through groove 412 that abuts against the cover plate 5 and is recessed inward, and the through groove 412 extends along the sliding direction of the slider 41 and is located in the central region of the extending side surface of the slider 41, and at the same time extends from one end to the other end of the slider 41. By providing it in this manner, the contact area between the slider 41 and the cover plate 5 can be effectively reduced, and the sliding efficiency of the slider 41 can be improved.

[0036] A protruding portion 413 that protrudes and extends and abuts against the bottom of the slide groove 15 is provided on the side of the slider 41 that is away from the cover plate 5, and the protruding portion 413 extends along the sliding direction of the slider 41 and is located in the central region of the side surface of the slider 41, and at the same time extends from one end to the other end of the slider 41. By providing it in this manner, the contact area between the slider 41 and the slide groove 15 can be effectively reduced, and the sliding efficiency of the slider 41 can be improved.

[0037] The base body 11 includes a bottom plate 111, a peripheral wall 112 that projects and extends in a direction away from the rotating table 3 from the outer periphery of the bottom plate 111 on the side away from the rotating table 3 and has an annular shape, and a top plate 113 that is provided as a cover on the side of the peripheral wall 112 away from the bottom plate 111, and the through hole 12 passes through the bottom plate 111 and the top plate 113 in that order. The first bearing 2 is installed in the through hole 12 in the bottom plate 111, the position restriction assembly 4 is installed on the side of the bottom plate 111 away from the top plate 113, and the extension portion 312 in the rotating table body 31 passes through the through hole 12 in the bottom plate 111 and extends to the through hole 12 in the top plate 113.

[0038] The flexible position control mechanism 100 includes a second bearing 6 attached to the top plate 113 and forming a fixed connection with the top plate 113, a motor 7 fixed to the side of the bottom plate 111 facing away from the turntable 3, a first gear 8 fixed to the output end of the motor 7, and a second gear 9 fitted onto the extension portion 312 and meshing with the first gear 8, and one end of the extension portion 312 facing away from the turntable 3 is inserted into the second bearing 6 and fixedly connected to the second bearing 6, and the extension portion 312 forms a rotational connection with the top plate 113 via the second bearing 6.

[0039] The position restriction mechanism 100 in this embodiment can be applied to a mechanical configuration that requires restriction of the rotational position of a rotating part of a robot turntable 3 or a tabletop fan.

[0040] The principle of the flexible position restriction mechanism 100 in this embodiment is as follows. The rotating table 3 rotates clockwise or counterclockwise, and when the lever 32 in the rotating table 3 rotates until it contacts the position restriction part 42, the position restriction part 42 is connected to the slider 41, and springs are attached to both ends of the slider 41, so that the lever 32 moves and drives both the position restriction part 42 and the slider 41 until the position restriction part 42 contacts the corresponding position restriction surface 13, thereby preventing the position restriction part 42 from moving and preventing the corresponding lever 32 from moving, thereby realizing the position restriction in which the rotating table 3 rotates up to 180°. When the rotating table 3 needs to be reset, the lever 32 leaves the position restriction part 42 and returns to the initial position, and the position restriction part 42 springs back to the initial position by the elastic force of the springs at both ends of the slider 41, preparing for the next position restriction. In a vibration environment, the spring can control the posture of the slider 41, so that by installing the spring, it is possible to avoid vibration of the slider 41 when it springs back, thereby reducing the collision wear caused by the springback and reducing the generation of noise.

[0041] As shown in Figures 6 to 8, Figure 6 is a schematic plan view of the flexible position restriction mechanism 100 of the embodiment when the rotating table 3 is in the initial position, Figure 7 is a schematic plan view of the flexible position restriction mechanism 100 of the embodiment when the rotating table 3 rotates forward by 180° and performs position restriction, and Figure 8 is a schematic plan view of the flexible position restriction mechanism 100 of the embodiment when the rotating table 3 is reversed by 180° and performs position restriction. The specific position restriction principle is as follows: as shown in Figure 6, when the rotating table 3 is in the initial position, the lever 32 of the rotating table 3 is in position A, and the position restriction part 42 is in position B due to the interaction of the springs at both ends of the slider 41.

[0042] 7, in the process of rotating table 3 rotating 180° forward (clockwise), position restriction unit 42 moves from position B to position B1 by the drive of lever 32, and is prevented from moving rightward by position restriction surface 13 on base body 11. Locking position restriction unit 42 restricts the rotation of lever 32, i.e., restricts the forward rotation of rotating table 3, and positions lever 32 on rotating table 3 at position A1, thereby realizing position restriction for rotating table 3 by 180° forward. When rotating table 3 is reset, i.e., in the process of reversing 180°, lever 32 disengages from position restriction unit 42, and slider 41 returns from position B1 to position B due to the action of the springs on both ends, and in this process, slider 41 is driven so that the position restriction returns to the initial position.

[0043] 8, in the process of the rotating table 3 rotating 180° (counterclockwise), the position restriction part 42 moves from position B to position B2 by the drive of the lever 32, and is prevented from moving leftward by the position restriction surface 13 on the base body 11. The locking of the position restriction part 42 restricts the rotation of the lever 32, i.e., restricts the rotation of the rotating table 3, and positions the lever 32 on the rotating table 3 at position A1, thereby realizing the position restriction in which the rotating table 3 rotates 180°. When the rotating table 3 is reset, i.e., in the process of rotating forward 180°, the lever 32 disengages from the position restriction part 42, and the slider 41 returns from position B1 to position B due to the action of the springs on both ends, and in this process, the slider 41 is driven so that the position restriction returns to the initial position.

[0044] In comparison with the related art, the flexible position control mechanism 100 of the present embodiment has a lever 32 installed on the periphery of the rotating table 3, and a position control assembly 4 is installed on the base body 11, the position control assembly 4 consisting of a slider 41 slidably installed on the base body 11, a position control portion 42 formed by protruding and extending from the side of the slider 41 close to the rotating table 3, and two elastic members 43 installed along the sliding direction of the slider 41 and fixed to both ends of the slider 41, and one end of each of the two elastic members 43 in the position control assembly 4 that is away from the slider 41 is fixedly connected to the base body 11, and two position control surfaces 13 are installed on both sides of the through hole 12 in the base body 11 that face each other along the circumferential direction and correspond to the position control portion 42, and are equally spaced from the slider 41. In this way, when the rotating table 3 rotates nearly 180° and the lever 32 presses against the position restriction part 42 and the position restriction part 42 is driven to move, the position restriction part 42 abuts against the position restriction surface on the corresponding side to implement position restriction, i.e., the 180° position restriction of the rotating table 3 is realized, and when resetting, the lever 32 disengages from the position restriction part 42, and the position restriction part 42 springs back due to the elastic force of the elastic members 43 on both ends to implement resetting, and the slider 41 does not reciprocate on the base body 11, reducing noise generation and providing excellent stability. Also, the flexible position restriction mechanism 100 of the present invention employs a mechanical position restriction, which requires fewer operations, is simple in structure, occupies less space, and is highly reliable.

[0045] It should be noted that the above is merely an embodiment of the present invention, and those skilled in the art may make modifications without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. [Explanation of symbols]

[0046] 100 Flexible position control mechanism 1 Pedestal 11 Base body 111 Bottom plate 112 Peripheral wall 113 Tabletop 12 through holes 13 Position control surface 14 Mounting groove 15 Slide groove 16 Connection groove 17 Fixed groove 18 Groove 2 No. 1 bearing 3 Rotating table 31 Rotating table body 311 Main body 312 Extension 32 Lever 4 Positioning Assembly 41 Slider 411 Guide groove 412 Through groove 413 Convex part 42 Position regulation part 43 Elastic Members 5 Cover Plate 51 Through hole 6 No. 2 bearing 7 Motor 8 First Gear 9 2nd Gear

Claims

1. A flexible position restriction mechanism, The flexible position restriction mechanism is used to realize a position restriction of 180° forward and reverse rotation, the position restriction mechanism includes a base, a first bearing, a rotating base, and a position restriction assembly; The base includes a base body and a through hole that penetrates the base body and has a circular shape; the first bearing is mounted in the through hole and forms a fixed connection with the base body; The rotating table includes a rotating table main body that is inserted into the first bearing and fixedly connected to the first bearing and has an annular shape, and a lever that is formed by protruding and extending from a periphery of the rotating table main body, and the rotating table main body forms a rotating connection with the base main body via the first bearing, The position restriction assembly and the lever are installed on the same side of the base body, The position restriction assembly includes a slider slidably provided on the base body, a position restriction portion formed by projecting and extending from a side of the slider adjacent to the rotating base, and two elastic members installed along the sliding direction of the slider and fixed to both ends of the slider, respectively, one end of each of the two elastic members remote from the slider being fixedly connected to the base body, the position restriction unit is located on a straight line on which the same diameter of the rotating base body is located together with the lever when the position restriction unit is in an initial position, and the position restriction unit is installed at a distance from the rotating base body; two position restriction surfaces are provided on both sides of the base body that face each other in a circumferential direction of the through hole and correspond to the position restriction portion, the two position restriction surfaces being equally spaced from the position restriction portion, A flexible position control mechanism characterized in that when the lever rotates 180 degrees to the position control portion, clockwise or counterclockwise, until the lever is pressed against the position control portion and moves and drives the position control portion, the position control portion abuts against the position control surface on the corresponding side to perform position control.

2. the base further includes a circular mounting groove formed inwardly from the base body, a slide groove formed inwardly from the base body and spaced from the mounting groove, and a connection groove formed inwardly from the base body and communicating the mounting groove and the slide groove, the through hole being formed penetrating from a groove bottom of the mounting groove to the other side, the slider being slidably provided in the slide groove, and the position regulating portion extending from the connection groove to the mounting groove, 2. The flexible position restriction mechanism according to claim 1, wherein the two opposing groove side surfaces of the connection groove are the two position restriction surfaces located on both opposing sides of the position restriction portion.

3. The flexible position control mechanism as described in claim 2, characterized in that the flexible position control mechanism further includes a cover plate that is installed on the base body and at the same time completely covers the mounting groove, the slide groove and the connection groove, and a through hole is drilled at a position of the cover plate corresponding to the through hole.

4. The flexible position control mechanism according to claim 3, characterized in that an inwardly recessed guide groove is provided at each end of the slider, and the two elastic members are partially inserted into the two guide grooves, respectively.

5. The flexible position control mechanism described in claim 4, characterized in that the base body and the cover plate each have an inwardly recessed fixing groove at a position corresponding to one end of each of the two elastic members that is away from the slider, and each of the two elastic members each has an end that is away from the slider that is fixed to the corresponding fixing groove.

6. The flexible position restriction mechanism according to claim 4, characterized in that the side of the slider closest to the cover plate has a through groove that abuts against the cover plate and is recessed inward, the through groove extending along the sliding direction of the slider, and the side of the slider away from the cover plate has a protruding portion that protrudes and abuts against the bottom of the slide groove, the protruding portion extending along the sliding direction of the slider.

7. The flexible position control mechanism as described in claim 4, characterized in that an inwardly recessed groove is provided at a position corresponding to the edge of the cover plate of the base body, and the cover plate is covered with the groove and fixed by a plurality of screws.

8. 3. The flexible position restriction mechanism according to claim 2, wherein a surface of the slider is treated with diamond-like carbon.

9. The flexible position control mechanism described in claim 1, characterized in that the rotating table main body includes a ring-shaped main body portion and a cylindrical extension portion that protrudes and extends from the inner edge of the main body portion along its axial direction, the extension portion is inserted and fixed into the first bearing, and the lever is formed by protruding and extending outward from the periphery of the main body portion along its radial direction.

10. 2. The flexible position restriction mechanism according to claim 1, wherein the elastic member is a spring.

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