Location Regulation Agency

Abstract

The present invention discloses a position restriction mechanism. [Solution] The position restriction mechanism includes a base, a first bearing, a rotating base, and a swing lever assembly. The base includes a base body and a through hole penetrating the base body, 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 the rotating base body, the swing lever assembly includes a second bearing fixed to the base body, a swing lever inserted into the second bearing, a slider slidably connected to the swing lever, an elastic member connected between the swing lever and the slider, a movable magnetic steel fixed to the slider, and a fixed magnetic steel fixed to the base body, and position restriction parts are installed at equal intervals from the slider on both sides of the base body facing the slider, and the position of the lever is restricted by the slider and the position restriction part.

Description

[Technical field]

[0001] The present invention relates to the technical field of position regulation of a rotary table, and more particularly to a 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 in which the turntable has an angle of greater than ±180° (positive or negative 180 degrees), and most rotational positioning structures are unable to perform rotational positioning for structures greater than +180° or greater than -180° at the same time. The rotational positioning structures in other application scenarios all adopt complex mechanical position control such as spiral positioning and a tracking slider aligned with a buffer, in cooperation with electrical position control or software position control to protect the abnormal rotation of the rotation mechanism.

[0004] However, the above applications require numerous and complicated operations in the rotation positioning structure of the turntable, occupy a large space, are relatively unsuitable for various types of turntables, and mostly rely solely on electrical position control to achieve rotation positioning greater than ±180°, which means there is a potential risk of electrical component failure and low reliability in application to turntables.

[0005] Therefore, it is necessary to provide a position restriction mechanism to solve the above problem. 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 position restriction mechanism for realizing a position restriction in which the forward and reverse rotation is greater than 180 degrees, the position restriction mechanism including a base, a first bearing, a rotating base, and a swing lever 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 having an annular shape and being inserted into the first bearing to form a fixed connection with the first bearing, and a lever 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 swing lever assembly and the lever are installed on the same side of the base body, the swing lever assembly includes a second bearing fixedly connected to the base body, a swing lever inserted into the second bearing and fixedly connected to the second bearing, a slider fitted into the swing lever and forming a sliding connection with the swing lever, an elastic member connected between the swing lever and the slider, a movable magnetic steel fixed to one end of the slider away from the swing lever, and a fixed magnetic steel fixed to the base body and installed opposite the movable magnetic steel, the swing lever is located together with the lever on a straight line on which the same diameter of the rotating base body is located when in an initial position, and the slider is spaced from the rotating base body, the swing lever forms a rotational connection with the base body via the second bearing, and the base body is provided with position regulating parts installed at equal intervals from the slider on both sides facing the slider in the circumferential direction, When the lever rotates clockwise or counterclockwise until it is pressed against the slider, the lever engages with the slider, the lever continues to rotate to drive the rotation of the slider, and at the same time the slider is pulled along the axial direction of the oscillating lever, and when the lever rotates more than 180 degrees from the initial position, the slider is abutted against the position control portion on the corresponding side to perform position control.

[0008] Preferably, the base further includes an annular protrusion extending from an edge position of the base body, surrounding the through hole, and having a notch, the notch being positioned directly opposite the slider, and the flat surfaces on both sides of the notch being the two position control portions located on opposing sides of the slider.

[0009] Preferably, the lever has opposing sides each having a protruding bump, the slider has opposing sides each having an inwardly recessed groove that engages with the bump, and when the lever rotates clockwise or counterclockwise until it presses against the slider, the lever presses the bump against the corresponding groove on the slider to form an engagement.

[0010] Preferably, one side of the rocking lever away from the base body is recessed inward to form a first accommodating groove, one end of the first accommodating groove away from the slider is provided with a first mounting post protruding therefrom, one side of the slider close to the base is provided with a second accommodating groove recessed inward, and one end of the second accommodating groove away from the rocking lever is provided with a second mounting post protruding therefrom, the second accommodating groove is covered by the rocking lever and forms a sliding connection with the rocking lever, the elastic member is accommodated in the first accommodating groove and the second accommodating groove, and both ends of the elastic member are fixed to the first mounting post and the second mounting post, respectively.

[0011] Preferably, a guide groove is drilled on each side of the second accommodating groove, and two pins are inserted at a distance from each other on each side of the first accommodating groove, and the pins extend into the guide grooves on the corresponding sides to limit the sliding stroke of the slider.

[0012] Preferably, both sliding surfaces of the slider and the rocking lever are treated with diamond-like carbon.

[0013] Preferably, the base body includes a cylindrical first body portion and a first extension portion formed by protruding and extending from a periphery of the first body portion, the through hole being formed in the first body portion, and the second bearing being fixedly connected to the first extension portion.

[0014] Preferably, the first body portion has a first fixed groove recessed inward, the second bearing is attached to the first fixed groove and forms a fixed connection with the first body portion, the first body portion has a second fixed groove recessed inward, the fixed magnetic steel is attached to the second fixed groove and forms a fixed connection with the first body portion, and the slider has a third fixed groove recessed inward on one side adjacent to the first body portion, and the movable magnetic steel is attached to the third fixed groove and forms a fixed connection with the slider.

[0015] Preferably, the turntable main body includes a second body portion having an annular shape and a second extension portion having a cylindrical shape and protruding and extending from an inner edge of the second body portion along the axial direction of the second body portion, the second extension portion being inserted and fixed into the first bearing, and the lever is formed by protruding and extending outward from the peripheral edge of the second body portion along the radial direction of the second body portion.

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

[0017] In comparison with the related art, the position restriction mechanism of the present invention has a lever installed on the periphery of the rotating table, a rocking lever assembly consisting of a second bearing, a rocking lever, a slider, an elastic member, a movable magnetic steel, and a fixed magnetic steel installed on the base body, and position restriction parts installed at equal intervals from the slider are installed on both sides of the slider corresponding to the circumferential direction of the base body, so that when the rotating table rotates nearly 180 degrees and the lever presses against the slider, the slider is driven to press against the position restriction part on the corresponding side. This allows the lever to be restricted in position, i.e., the rotating base can be restricted in position by more than 180 degrees. When resetting, the lever separates from the slider, and the slider springs back due to the action of the elastic member, and resets under the action of the magnetic force of the movable magnetic steel and the fixed magnetic steel. As a result, the swing lever assembly does not rotate back and forth on the base body, reducing noise generation and improving stability. Furthermore, the position restriction mechanism of the present invention adopts a mechanical position restriction, which requires less operation, has a simple structure, occupies less space, and is highly reliable.

[0018] In order to more clearly describe the technical solutions in the embodiments of the present invention, the following briefly introduces drawings necessary for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can further obtain other drawings based on these drawings without any creative work. [Brief description of the drawings]

[0019] [Figure 1] 4 is a schematic diagram showing a three-dimensional structure of a position restriction mechanism according to an embodiment of the present invention. FIG. [Diagram 2] FIG. 4 is a schematic exploded view of the structure of the position restriction mechanism according to the embodiment of the present invention. [Diagram 3] FIG. 2 is a cross-sectional view taken along line MM in FIG. [Figure 4] 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. [Diagram 5]13 is a schematic plan view of the position restriction mechanism according to the embodiment of the present invention when the turntable is rotated forward until it reaches an angle of more than 180 degrees and the position is restricted. FIG. [Figure 6] 13 is a schematic plan view of the position restriction mechanism according to the embodiment of the present invention when the rotation base is reversed until it rotates more than 180 degrees and the position is restricted. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] 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.

[0021] The embodiment of the present invention provides a position restriction mechanism 100, which includes a base 1, a first bearing 2, a rotating base 3, and a swing lever assembly 4, as shown in FIGS.

[0022] Specifically, the base 1 includes a base body 11 and a through hole 12 that penetrates the base body 11 and has 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 having a circular shape, which is inserted into the first bearing 2 and forms a fixed connection therewith, and a lever 32 formed by extending and protruding from the periphery 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 rocking lever assembly 4 and the lever 32 are installed on the same side of the base body 11, and the rocking lever assembly 4 includes a second bearing 41 fixedly connected to the base body 11, a rocking lever 42 inserted into the second bearing 41 and forming a fixed connection therewith, a slider 43 fitted into the rocking lever 42 and forming a sliding connection therewith, an elastic member 44 connected between the rocking lever 42 and the slider 43, a movable magnetic steel 45 fixed to one end of the slider 43 away from the rocking lever 42, and a fixed magnetic steel 46 fixed to the magnetic steel 11 and installed opposite the movable magnetic steel 45. When in the initial position, the magnetic steel oscillating lever 42 is located on a straight line where the same diameter of the rotating table body 31 is located together with the lever 32, and the slider 43 is spaced apart from the rotating table body 31. The oscillating lever 42 forms a rotational connection with the base body 11 via the second bearing 41, and the base body 11 is provided with position regulating parts 13 on both sides opposing the slider 43 in the circumferential direction, each of which is installed at equal intervals from the slider 43.

[0025] When the lever 32 rotates clockwise or counterclockwise until it is pressed against the slider 43, the lever 32 engages with the slider 43, the lever 32 continues to rotate, driving the rotation of the slider 43, and at the same time, the slider 43 is pulled along the axial direction of the oscillating lever 42. When the lever 32 rotates more than 180 degrees from the initial position, the slider 43 is abutted against the position control portion 13 on the corresponding side to perform position control.

[0026] A rotating shaft 424 formed to protrude and extend is installed on one side of the oscillating rod 42 adjacent to the base body 11, and the oscillating rod 42 is inserted into the second bearing 41 via the rotating shaft 424 and forms a fixed connection therewith.

[0027] The elastic member 44 is a spring. Of course, according to actual needs, the elastic member 44 can also select a C-shaped spring plate, an S-shaped spring plate, and other parts with elastic recovery.

[0028] In this embodiment, the base body 11 includes a first body portion 111 having a cylindrical shape and a first extension portion 112 formed by protruding and extending from the periphery of the first body portion 111, the through hole 12 is formed in the first body portion 111, i.e., the through hole 12 is installed through the central region of the first body portion 111, and the second bearing 41 is fixedly connected to the first extension portion 112, i.e., the swing lever assembly 4 is installed in the first extension portion 112, and its slider 43 can extend to the first body portion 111. By installing the base body 11 as the first body portion 111 and the first extension portion 112, the mounting area of ​​the base body 11 can be improved, and thus it is easy to install the rotating base 3 and the swing lever assembly 4 with a gap therebetween.

[0029] In this embodiment, the first body portion 111 has a first fixed groove 113 recessed inward, the second bearing 41 is attached to the first fixed groove 113 and forms a fixed connection with the first body portion 111, the first body portion 111 has a second fixed groove 114 recessed inward, the fixed magnetic steel 46 is attached to the second fixed groove 114 and forms a fixed connection with the first body portion 111, and the slider 43 has a third fixed groove 435 recessed inward on one side adjacent to the first body portion 111, and the movable magnetic steel 45 is attached to the third fixed groove 435 and forms a fixed connection with the slider 43. By mounting the second bearing 41 in the first fixed groove 113 formed by being recessed inward, mounting the fixed magnetic steel 46 in the second fixed groove 114 formed by being recessed inward, and mounting the movable magnetic steel 45 in the third fixed groove 435 formed by being recessed inward, the overall height of the position control mechanism 100 can be reduced in this way, i.e., the space occupied by the height of the position control mechanism 100 when in use can be reduced, thereby improving its applicability.

[0030] In this embodiment, the base 1 further includes an annular protrusion 14 that is formed by extending from the edge position of the base body 11, is installed surrounding the through hole 12, and has a notch, the notch is installed directly opposite the slider 43, and the flat surfaces on both sides of the notch are two position control portions 13 located on opposite sides of the slider 43.

[0031] Specifically, the annular protrusion 14 is disposed on the first main body portion 111, and the cutout is aligned with the extending direction of the first extending portion 112.

[0032] Naturally, depending on actual needs, the position control portions 13 on both opposing sides of the slider 43 may protrude and extend from the first main body portion 111 to form a columnar or block body, and do not necessarily have to form an annular structure with a notch.

[0033] In this embodiment, the rotating base body 31 includes a second main body portion 311 having an annular shape, and a second extending portion 312 having a cylindrical shape and extending from the inner edge of the second main body portion 311 along its axial direction, i.e., the rotating base 3 has a hollow structure, and by installing in this manner, the wire harness can be easily passed through, and the problem of the wire harness being excessively twisted during rotation of the rotating base 3 is avoided. The second extending portion 312 is inserted and fixed to the first bearing 2 and extends outward through the through hole 12, and the lever 32 is formed by extending from the periphery of the second main body portion 311 along its radial direction and extending outward.

[0034] In this embodiment, bumps 321 are provided on both opposing sides of the lever 32, each of which protrudes and extends, and grooves 431 are provided on both opposing sides of the slider 43, each of which is recessed inward and engages with the bumps 321. When the lever 32 rotates clockwise or counterclockwise until it is pressed against the slider 43, the bumps 321 of the lever 32 press against the corresponding grooves 431 of the slider 43 to form an engagement. By providing the lever 32 and the slider 43 in this manner, a meshing position restriction is formed between the lever 32 and the slider 43, and it is possible to prevent the lever 32 from sliding when pressed against the slider 43.

[0035] In this embodiment, one side of the rocking lever 42 away from the base body 11 is recessed inward to form a first receiving groove 421, one end of the first receiving groove 421 away from the slider 43 is provided with a first mounting post 422 protruding therefrom, one side of the slider 43 close to the base 1 is provided with a second receiving groove 432 recessed inward, one end of the second receiving groove 432 away from the rocking lever 42 is provided with a second mounting post 433 protruding therefrom, the second receiving groove 432 is provided to cover the rocking lever 42 and form a sliding connection therewith, the elastic member 44 is received in the first receiving groove 421 and the second receiving groove 432, and both ends of the elastic member 44 are fixed to the first mounting post 422 and the second mounting post 433, respectively. By installing in this manner, the elastic member 44 can be received between the rocking lever 42 and the slider 43, thereby reducing the installation height of the rocking lever assembly 4.

[0036] Further, guide grooves 434 are drilled and installed on both sides of the second accommodating groove 432, and two pins 423 are inserted at an interval on both sides of the first accommodating groove 421, and the pins 423 extend into the corresponding guide grooves 434, thereby restricting the sliding stroke of the slider 43. By installing in this manner, the pins 423 press against the ends of the guide grooves 434, thereby controlling the sliding stroke of the slider 43.

[0037] In this embodiment, both sliding surfaces of the slider 43 and the swing lever 42 are treated with diamond-like carbon (DLC). By installing them in this manner, the hardness and wear resistance of the slider 43 can be effectively improved, thereby reducing the coefficient of friction between the slider 43 and the swing lever 42, improving the sliding performance of the slider 43 and reducing the rotation moment of the rotating table 3.

[0038] 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.

[0039] The principle of the position restriction mechanism 100 in this embodiment is that when the rotating base 3 is in the initial position, the lever 32 and the swing lever assembly 4 of the rotating base 3 are located on opposite sides of the rotating base 3. When the rotating base 3 starts to rotate and rotates close to 180 degrees, the bump 321 of the lever 32 engages with the groove 431 of the slider 43 and presses against it. At this time, the slider 43 is slidably connected to the swing rod 42, and the two are connected by a spring, so the rotating base 3 can still rotate up to an angle greater than 180 degrees, that is, the lever 32 drives the slider 43 to rotate together, and when the angle exceeds 180 degrees, the slider 43 cannot rotate due to the pressing action of the position restriction part 13 on the corresponding side, thereby implementing the pressing position restriction when the rotating base 3 is greater than 180 degrees. When it is necessary to reset the rotating table 3, the bump 321 on the lever 32 disengages from the groove 431 on the slider 43, at which time the slider 43 springs back due to the elastic action of the spring, and the posture of the slider 43 is controlled, preventing oscillation and reducing the generation of noise, and also preventing the slider 43 from coming into contact with the rotating table 3 and becoming worn. Furthermore, the slider 43 is reset by the magnetic action between the fixed magnetic steel pieces 46, preventing the oscillating lever assembly 4 from oscillating left and right and colliding with the position regulating portion 13, thereby further reducing the generation of noise.

[0040] As shown in Figures 4 to 6, Figure 4 is a schematic plan view of the turntable 3 in the position control mechanism 100 of the embodiment when it is in the initial position, Figure 5 is a schematic plan view of the turntable 3 in the position control mechanism 100 of the embodiment when it rotates forward and is positionally restricted until it reaches more than 180 degrees, and Figure 6 is a schematic plan view of the turntable 3 in the position control mechanism 100 of the embodiment when it rotates reverse and is positionally restricted until it reaches more than 180 degrees, and the specific principle of position control is as follows.

[0041] As shown in FIG. 4, when the rotating base 3 is in the initial position, the lever 32 is in position A, and the slider 43 is in position B due to the action of the spring, the movable magnetic steel 45 and the fixed magnetic steel 46.

[0042] As shown in FIG. 5, in the process of the rotating table 3 rotating forward (rotating clockwise) until it exceeds 180 degrees, the bump 321 of the lever 32 engages with the groove 431 of the slider 43, and drives the slider 43 to move from position B to position B1 along the rotation direction of the lever 32; in this process, the swing lever assembly 4 rotates in the D1 direction (counterclockwise direction of the rotation shaft 424), the slider 43 slides along the C1 direction, and the position control part 13 on the corresponding side on the base body 11 prevents the slider 43 from moving further to the right, locking the movement of the slider 43; the locking of the slider 43 limits the further forward rotation of the rotating table 3, and the lever 32 of the rotating table 3 is in position A1, thereby realizing the position control when the forward rotation of the rotating table 3 is greater than 180 degrees. During the process of returning (resetting) the rotating base 3 to position A, the bump 321 of the lever 32 disengages from the groove 431 of the slider 43 and returns to position A, the slider 43 slides in the reverse direction of C1 due to the action of the spring and returns to its initial position, and the fixed magnetic steel 46 on the base body 11 attracts the movable magnetic steel 45 on the slider 43, thereby returning the oscillating lever assembly 4 to its initial position, and finally the slider 43 returns from position B1 to position B, thereby limiting the position of the slider 43.

[0043] As shown in FIG. 6, in the process of the rotating table 3 rotating in the reverse direction (counterclockwise) until the angle becomes larger than 180 degrees, the bump 321 of the lever 32 engages with the concave groove 431 of the slider 43, and drives the slider 43 to move from position B to position B2 along the rotation direction of the lever 32. In this process, the swing lever assembly 4 rotates in the direction D2 (clockwise direction of the rotation shaft 424), the slider 43 slides along the direction C2, and the position restriction part 13 on the corresponding side of the base body 11 prevents the slider 43 from moving further to the left, locking the movement of the slider 43. Locking the slider 43 means that the rotating table 3 can be moved further. The lever 32 of the rotating table 3 is in the A2 position, thereby realizing the position restriction when the forward rotation of the rotating table 3 is greater than 180 degrees. In the process of returning (resetting) the rotating table 3 to the A position, the bump 321 of the lever 32 leaves the groove 431 of the slider 43 and returns to the A position, the slider 43 slides along the reverse direction of C2 due to the action of the spring and returns to the initial position, and the fixed magnetic steel 46 on the base body 11 attracts the movable magnetic steel 45 on the slider 43, so that the swing lever assembly 4 returns to the initial position, and finally the slider 43 returns from the B2 position to the B position, thereby restricting the position of the slider 43.

[0044] In comparison with the related art, in the position restriction mechanism 100 of this embodiment, the lever 32 is installed on the periphery of the rotating table 3, the rocking lever assembly 4 consisting of the second bearing 41, the rocking lever 42, the slider 43, the elastic member 44, the movable magnetic steel 45, and the fixed magnetic steel 46 is installed on the base body 11, and the position restriction parts 13 are installed at equal intervals from the slider 43 on both sides facing each other along the circumferential direction of the base body 11 in correspondence with the slider 43, so that the rotating table 3 rotates nearly 180 degrees and the lever 32 is pushed against the slider 43. When it hits the base body 11, the slider 43 can be driven to press against the position restriction part 13 on the corresponding side, thereby restricting the position of the lever 32, i.e., restricting the position when the rotating base 3 is rotated more than 180 degrees, and when resetting, the lever 32 separates from the slider 43, the slider 43 springs back due to the action of the elastic member 44, and is reset by the magnetic action of the movable magnetic steel 45 and the fixed magnetic steel 46, so that the swing lever assembly 4 does not rotate back and forth on the base body 11, reducing noise generation and providing high stability. Furthermore, the position restriction mechanism 100 according to the present invention employs mechanical position restriction, which not only requires fewer operations, but also has a simple structure, a small space occupation, and high reliability.

[0045] The above description 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 are within the scope of protection of the present invention. [Explanation of symbols]

[0046] 100, position regulation mechanism 1. Pedestal 11. Base body 111, first body part 112, 1st extension part 113, 1st fixing groove 114, 2nd fixing groove 12. Through hole 13, Position regulation part 14, annular protrusion 2. First bearing 3. Rotating table 31. Rotating table body 311, second body part 312, 2nd extension 32. Lever 321, Bump 4. Swing lever assembly 41, second bearing 42. Swing lever 421, No. 1 storage groove 422, first mounting post 423, Pin 424, Rotating shaft 43. Slider 431, groove 432, second storage groove 433, second mounting post 434, guide groove 435, 3rd fixing groove 44. Elastic member 45, mobile magnetic steel 46, fixed magnetic steel

Claims

1. A position restriction mechanism, Used to implement position regulation where forward and reverse rotation is greater than 180 degrees, a base, a first bearing, a rotating base, and a swing lever 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 having an annular shape and being inserted into the first bearing to form a fixed connection with the first bearing, and a lever 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 swing lever assembly and the lever are installed on the same side of the base body, the swing lever assembly includes a second bearing fixedly connected to the base body, a swing lever inserted into the second bearing and fixedly connected to the second bearing, a slider fitted into the swing lever and forming a sliding connection with the swing lever, an elastic member connected between the swing lever and the slider, a movable magnetic steel fixed to one end of the slider away from the swing lever, and a fixed magnetic steel fixed to the base body and installed opposite the movable magnetic steel, the swing lever is located together with the lever on a straight line on which the same diameter of the rotating base body is located when in an initial position, and the slider is spaced from the rotating base body, the swing lever forms a rotational connection with the base body via the second bearing, and the base body is provided with position restriction parts installed at equal intervals from the slider on both sides facing the slider in the circumferential direction, A position control mechanism characterized in that when the lever rotates clockwise or counterclockwise until it is pressed against the slider, the lever engages with the slider, the lever continues to rotate to drive the rotation of the slider, and at the same time, the slider is pulled along the axial direction of the oscillating lever, and when the lever rotates more than 180 degrees from the initial position, the slider abuts against the position control portion on the corresponding side to perform position control.

2. The position control mechanism described in claim 1, characterized in that the base further includes an annular protrusion formed by extending from an edge position of the base body, surrounding the through hole, and having a notch, the notch being positioned directly opposite the slider, and the flat surfaces on both sides of the notch being the two position control portions located on opposing sides of the slider.

3. The position control mechanism described in claim 1, characterized in that the lever has opposing sides with protruding bumps, the slider has opposing sides with inwardly recessed grooves that engage with the bumps, and when the lever rotates clockwise or counterclockwise until it is pressed against the slider, the lever presses the bumps against the grooves on the corresponding side of the slider to form an engagement.

4. 2. The position regulating mechanism according to claim 1, wherein one side of the rocking lever away from the base body is recessed inward to form a first accommodating groove, a first mounting post protruding from one end of the first accommodating groove away from the slider, a second mounting post protruding from one end of the second accommodating groove away from the rocking lever, the second accommodating groove is covered by the rocking lever and forms a sliding connection with the rocking lever, the elastic member is accommodated in the first accommodating groove and the second accommodating groove, and both ends of the elastic member are fixed to the first mounting post and the second mounting post, respectively.

5. 5. The position restriction mechanism according to claim 4, characterized in that a guide groove is formed on each side of the second accommodating groove, and two pins are inserted at a distance from each other on each side of the first accommodating groove, and the pins extend into the guide grooves on the corresponding sides to restrict the sliding stroke of the slider.

6. 2. The position restriction mechanism according to claim 1, wherein the sliding surfaces of said slider and said swing lever are both treated with diamond-like carbon.

7. The position control mechanism described in claim 1, characterized in that the base body includes a cylindrical first body portion and a first extension portion formed by protruding and extending from a periphery of the first body portion, the through hole is formed in the first body portion, and the second bearing is fixedly connected to the first extension portion.

8. The position control mechanism described in claim 7, characterized in that the first main body portion has a first fixed groove recessed inward, the second bearing is attached to the first fixed groove and forms a fixed connection with the first main body portion, the first main body portion has a second fixed groove recessed inward, the fixed magnetic steel is attached to the second fixed groove and forms a fixed connection with the first main body portion, and the slider has a third fixed groove recessed inward on one side adjacent to the first main body portion, and the movable magnetic steel is attached to the third fixed groove and forms a fixed connection with the slider.

9. The position control mechanism described in claim 1, characterized in that the rotating table main body includes a second main body portion having an annular shape and a second extension portion having a cylindrical shape and protruding and extending from an inner edge of the second main body portion along the axial direction of the second main body portion, the second extension portion being inserted and fixed into the first bearing, and the lever is formed by protruding and extending outward from the peripheral edge of the second main body portion along the radial direction of the second main body portion.

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

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