Self-positioning structure for upper cavity and lower cavity of circulator

Abstract

The invention discloses a circulator upper and lower cavity self-positioning structure, and relates to the technical field of circulator positioning structure detection.The circulator upper and lower cavity self-positioning structure comprises a lower base, an upper base is arranged on the top face of the lower base, a connector is detachably arranged in the middle of the side face of the lower base, and a lower magnetic circuit cover plate is fixedly arranged on the bottom face of the lower base; threaded holes are formed in the four corners of the bottom face of the lower base, an upper magnetic circuit cover plate is arranged at the top end of the upper base, screws are inserted into the four corners of the upper magnetic circuit cover plate, and the bottom ends of the screws are in threaded connection with the threaded holes through the upper base. The device further comprises a component unit, a positioning assembly and a limiting assembly, and the component unit is arranged in the lower base and the upper base and used for being matched with the lower base to be used as a whole. The structure is reasonable, the lower seat and the upper seat can be conveniently positioned during assembly through cooperative use of the positioning assembly and the limiting assembly, and the phenomenon that the whole assembly speed of the lower seat is affected due to the fact that the lower seat and the upper seat are not aligned is avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of circulator positioning structures, in particular to a self-positioning structure for upper and lower cavities of a circulator. BACKGROUND

[0002] A circulator is a one-way device with three or more ports, which comprises a microwave ferrite, a strip line center conductor circuit, a metal PIN needle and a permanent magnet. Due to the action of the gyromagnetic effect of the microwave ferrite magnetized by the bias magnetic field, the electromagnetic wave energy entering the first port is circulated to the second port output, and is isolated from the third port. A circulator with the publication number CN112542670A comprises two permanent magnets, two ferrites, a center conductor, a shell and a metal PIN needle, the two permanent magnets are assembled on the upper and lower sides of the two ferrites; the center conductor is assembled between the two ferrites; the center conductor comprises a resonance circuit and three matching circuits connected with the resonance circuit and symmetrical at 120 degrees, the matching circuit comprises a transmission line and a stub filter circuit, the stub filter circuit is connected with the resonance circuit through the transmission line, and the transmission line is connected with the metal PIN needle of the circulator port; the shell is used for providing a magnetic closed loop circuit and packaging the permanent magnet, the two ferrites and the center conductor. In the above technical solution, the three matching circuits can constitute a multi-stage low-pass filter circuit, so that the in-band loss is small, the out-of-band second harmonic suppression is large, and the problem of poor out-of-band harmonic suppression performance in the prior art is solved. The above-mentioned invention still has some problems in actual use. The existing circulator coaxial circulator in the assembled structure is usually fastened by fastening screws through the upper and lower cavities, the alignment of the upper and lower cavities of the existing product relies on assembly tooling, but the tooling machining precision is extremely high, and the cavity machining also has a tolerance problem, so the phenomenon of misalignment of the upper and lower cavities of the product or the product being stuck in the tooling often occurs, which greatly affects the assembly speed and cannot fully meet the requirements. SUMMARY

[0003] The purpose of the present application is to provide a self-positioning structure for the upper and lower cavities of a circulator, which realizes positioning between the lower seat and the upper seat during assembly by the cooperation of the positioning assembly and the limiting assembly, avoids misalignment, and thus affects the overall assembly speed of the lower seat. To achieve the above object, the application provides the following technical scheme: a circulator upper and lower cavity self-positioning structure, comprising a lower seat, a top surface of the lower seat is provided with an upper seat, a side surface of the lower seat is detachably provided with a connector at a middle position, a bottom surface of the lower seat is fixedly provided with a lower magnetic circuit cover plate, four corners of the bottom surface of the lower seat are provided with threaded holes, a top end of the upper seat is provided with an upper magnetic circuit cover plate, four corners of the upper magnetic circuit cover plate are provided with screws, bottom ends of the screws are threadedly connected with the threaded holes through the upper seat; further comprising a component unit, a positioning assembly and a limiting assembly, the component unit is arranged inside the lower seat and the upper seat for use in cooperation with the lower seat as a whole, the positioning assembly is arranged at a rear side of the upper seat for installation and use, and the limiting assembly is arranged at a rear side middle position of the lower seat for use in cooperation with the positioning assembly. Preferably, the component unit comprises a lower cavity provided in the lower seat, an upper cavity provided in the upper seat, the lower cavity and the upper cavity are in communication with each other, the lower cavity is sequentially placed with a first ferrite, a first magnetic film and a first permanent magnet, a dielectric block is arranged at an inner position of the first ferrite, a center conductor is arranged at a top end of the dielectric block, and a second ferrite is arranged at a top end of the center conductor. Preferably, an inner bottom surface of the upper cavity is provided with a second magnetic film, the upper cavity is provided with a second permanent magnet, and the second permanent magnet is located at a top surface of the second magnetic film. Preferably, the positioning assembly comprises a pair of positioning grooves provided at a rear side of the upper seat, a pair of side grooves are provided at both sides of inner walls of the positioning grooves, the side grooves and the positioning grooves are in communication with each other, a positioning plate is clamped in the positioning grooves, and through grooves corresponding to the side grooves are provided at both sides of the positioning plate. Preferably, a horizontal rod is rotatably connected to a horizontal position of the positioning plate, a pair of arm plates are fixedly connected to the horizontal rod, the other ends of the pair of arm plates are rotatably connected to a butt rod, and a pair of push plates are rotatably connected to the butt rod. Preferably, the other end of the push plate is rotatably connected to a fixed column, one end of the fixed column is fixedly connected to a side wall middle position of a sleeve block, the sleeve block is slidably connected to a longitudinal position of a slide rod, one end of the slide rod is fixedly connected to a sleeve ring, the other end of the slide rod is fixedly connected to a first shaft seat, the first shaft seat is fixedly connected to a middle position of the positioning plate, a first spring is sleeved on the slide rod, both ends of the first spring are fixedly connected to one side of the sleeve block and one side of the sleeve ring, respectively, both end positions of the horizontal rod are fixedly connected to side plates, the other end of the side plate is fixedly connected to a clamping column, and one end of the clamping column is clamped in the side groove through the through groove. Preferably, the limiting assembly comprises an L-shaped plate fixedly connected to the positioning plate, the L-shaped plate is attached to the rear side of the lower seat, the L-shaped plate is provided with a pair of plates, a pair of the L-shaped plates are fixedly connected with a horizontal plate, the horizontal plate is fixedly installed on the rear side of the lower seat through bolts. Preferably, the surface of the horizontal plate is fixedly connected with a pair of second shaft seats, a rod body is rotatably connected to the pair of second shaft seats, the two ends of the rod body are fixedly connected with pressing plates in the vertical direction, the other end of the pressing plate is provided with a movable slot, the pair of connecting rods are slidably connected in the movable slot. Preferably, the middle end of the movable slot is fixedly connected with a pair of pull plates, the other end of the pair of pull plates is fixedly connected with a shaft rod, the shaft rod is rotatably connected with a sleeve, the middle part of one side of the horizontal plate is fixedly connected with a supporting plate, the supporting plate is slidably connected with a sliding block, the sliding block is provided with a clamping groove, the sleeve is clamped in the clamping groove. Preferably, one side of the sliding block is fixedly connected with a pair of guide rods, the pair of guide rods are slidably connected to the frame, the bottom end of the frame is fixedly connected to the supporting plate, the second spring is fixedly connected between the frame and the sliding block, the middle part of the top surface of the sliding block is fixedly connected with a handle. In summary, the present application has the following advantages: 1. The structure of the present application is reasonable, the positioning plate on the L-shaped plate is arranged in the positioning slot, at this time the clamping column is separated from the through slot by the elastic force of the first spring, the positioning plate is arranged in the positioning slot, one end of the clamping column is arranged in the edge part of the positioning slot and slides, and the position of the upper seat is preliminarily limited by the positioning plate. 2. In the present application, when the positioning plate is completely arranged in the positioning slot, the rod body is rotated by pulling the pull plate of the limiting assembly, the movable slot on the pressing plate is pressed on the connecting rod, the arm plate drives the horizontal rod to rotate, the clamping column on the side plate is clamped in the side slot, the lower seat and the upper seat are positioned, and the phenomenon of deviation during assembly of the upper seat is avoided. BRIEF DESCRIPTION OF DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. Figure 1 It is a schematic view of the three-dimensional structure of the circulator body. Figure 2 It is a schematic view of the three-dimensional structure of the circulator from the rear. Figure 3 Figure 3 is a schematic view of the exploded perspective structure of the circulator; Figure 4 Figure 4 is a schematic view of the exploded perspective structure of the L-shaped plate; Figure 5 Figure 5 is a schematic view of the exploded perspective structure of the positioning plate; Figure 6 Figure 6 is a schematic view of the exploded perspective structure of the cross plate; Figure 7 Figure 7 is a schematic view of the exploded perspective structure of the pull plate; Figure 8 Figure 8 is a schematic view of the exploded perspective structure of the Figure 2 Figure 9 is a schematic view of the enlarged structure at A in Figure 8. In the figure: 1, lower seat; 101, upper seat; 102, connector; 103, lower magnetic circuit cover plate; 104, threaded hole; 105, upper magnetic circuit cover plate; 106, screw; 2, lower cavity; 201, upper cavity; 202, first ferrite; 203, first magnetic shunt; 204, first permanent magnet; 205, dielectric block; 206, center conductor; 207, second ferrite; 208, second magnetic shunt; 209, second permanent magnet; 3, positioning groove; 301, side groove; 302, positioning plate; 303, through groove; 304, cross rod; 305, arm plate; 306, butt joint rod; 307, push plate; 308, fixed column; 309, sleeve block; 310, sliding rod; 311, sleeve ring; 312, first shaft seat; 313, first spring; 314, side plate; 315, clamping column; 4, L-shaped plate; 401, cross plate; 402, second shaft seat; 403, rod body; 404, pressing plate; 405, movable groove; 406, pull plate; 407, shaft rod; 408, sleeve; 409, supporting plate; 410, sliding block; 411, clamping groove; 412, guide rod; 413, frame body; 414, second spring; 415, handle. DETAILED DESCRIPTION The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Embodiment: refer to Figure 1 - Figure 8The self-positioning structure of the upper and lower cavities of the circulator shown includes a lower seat 1, the top surface of which is provided with an upper seat 101, the middle part of the side surface of the lower seat 1 is detachably provided with a connector 102, the bottom surface of the lower seat 1 is fixedly provided with a lower magnetic circuit cover plate 103, the bottom surface of the lower seat 1 is provided with threaded holes 104 at the four corners, the top end of the upper seat 101 is provided with an upper magnetic circuit cover plate 105, the four corners of the upper magnetic circuit cover plate 105 are inserted with screws 106, the bottom end of the screw 106 is threadedly connected with the threaded hole 104 through the upper seat 101; it further includes a component unit, a positioning assembly and a limiting assembly, the component unit is arranged inside the lower seat 1 and the upper seat 101 for use in cooperation with the lower seat 1 as a whole, the positioning assembly is arranged at the rear side of the upper seat 101 for installation and use, and the limiting assembly is arranged at the rear middle part of the lower seat 1 for use in cooperation with the positioning assembly. Specifically, the positioning assembly facilitates the alignment between the lower seat 1 and the upper seat 101, thereby facilitating the assembly work between the lower seat 1 and the upper seat 101, and the specific working principle of the lower seat 1 is referred to the prior art, which will not be described in detail here. As an embodiment in the present embodiment, the component unit includes a lower cavity 2 formed in the lower seat 1, the inside of the upper seat 101 is provided with an upper cavity 201, the lower cavity 2 and the upper cavity 201 are in communication with each other, the inside of the lower cavity 2 is sequentially placed with a first ferrite 202, a first magnetic uniform sheet 203 and a first permanent magnet 204, the inside of the first ferrite 202 is provided with a dielectric block 205, the top end of the dielectric block 205 is provided with a center conductor 206, the top end of the center conductor 206 is provided with a second ferrite 207, the inside bottom surface of the upper cavity 201 is provided with a second magnetic uniform sheet 208, the inside of the upper cavity 201 is provided with a second permanent magnet 209, and the second permanent magnet 209 is located at the top surface of the second magnetic uniform sheet 208. Specifically, when the lower seat 1 and the upper seat 101 are assembled, the positioning assembly makes the upper seat 101 fit on the lower seat 1, aligns the lower cavity 2 on the lower seat 1 with the upper cavity 201, avoids the phenomenon of jamming of parts when assembling the internal parts of the lower cavity 2 and the upper cavity 201, and thus affects the normal use of the lower seat 1 as a whole. As an implementation manner in the embodiment, the positioning assembly comprises a pair of positioning grooves 3 arranged at the rear side of the upper seat 101, side grooves 301 are arranged at the two sides of the inner wall of the pair of positioning grooves 3, the side grooves 301 are in communication with the positioning grooves 3, a positioning plate 302 is clamped in the positioning grooves 3, through grooves 303 corresponding to the side grooves 301 are arranged at the two sides of the positioning plate 302, a cross rod 304 is rotationally connected to the transverse position of the positioning plate 302, a pair of arm plates 305 are fixedly connected to the cross rod 304, the other end of the pair of arm plates 305 is rotationally connected to a butt joint rod 306, a pair of push plates 307 are rotationally connected to the butt joint rod 306, the other end of the push plates 307 is rotationally connected to a fixed column 308, one end of the fixed column 308 is fixedly connected to the side wall of a sleeve block 309, the sleeve block 309 is slidingly connected to a sliding rod 310 in the longitudinal position, a sleeve ring 311 is fixedly connected to one end of the sliding rod 310, the other end of the sliding rod 310 is fixedly connected to a first shaft seat 312, the first shaft seat 312 is fixedly connected to the middle position of the positioning plate 302, a first spring 313 is sleeved on the sliding rod 310, the two ends of the first spring 313 are fixedly connected to one side of the sleeve block 309 and one side of the sleeve ring 311 respectively, side plates 314 are fixedly connected to the two end positions of the cross rod 304, clamping columns 315 are fixedly connected to the other end of the side plates 314, one end of the clamping columns 315 is clamped in the inner side of the side grooves 301 through the through grooves 303. Specifically, the positioning grooves 3 are arranged at the rear side of the upper seat 101, the positioning plate 302 is clamped in the inner side of the positioning grooves 3, so that the lower seat 1 and the upper seat 101 are aligned, when the positioning plate 302 moves to the inner side of the positioning grooves 3, the clamping columns 315 slide along the edge of the positioning grooves 3, the side grooves 301 are arranged at the two sides of the inner wall of the positioning grooves 3, when the positioning plate 302 continuously enters the inner side of the positioning grooves 3, the clamping columns 315 on the side plates 314 are clamped in the inner side of the side grooves 301 through the limiting assembly, so as to facilitate the preliminary positioning of the lower seat 1 and the upper seat 101, and avoid the deviation phenomenon. As an embodiment in the embodiment, the limiting assembly comprises an L-shaped plate 4 fixedly connected to the positioning plate 302, the L-shaped plate 4 is attached to the rear side of the lower seat 1, the L-shaped plate 4 is provided with a pair of plates, a pair of plates 401 are fixedly connected between the pair of L-shaped plates 4, the horizontal plate 401 is fixedly installed on the rear side of the lower seat 1 through bolts, the surface of the horizontal plate 401 is fixedly connected with a pair of second shaft seats 402, a rod body 403 is rotatably connected to the pair of second shaft seats 402, a pressing plate 404 is fixedly connected to both ends of the rod body 403 in the vertical direction, a movable groove 405 is formed at the other end of the pressing plate 404, a butt joint rod 306 is slidably connected in the movable groove 405, a pair of pull plates 406 are fixedly connected between the other ends of the pair of pull plates 406, a shaft rod 407 is fixedly connected between the pair of pull plates 406, a sleeve 408 is rotatably connected to the shaft rod 407, a supporting plate 409 is fixedly connected to one side of the horizontal plate 401, a sliding block 410 is slidably connected to the supporting plate 409, a clamping groove 411 is formed in the sliding block 410, the sleeve 408 is clamped in the clamping groove 411, a pair of guide rods 412 are fixedly connected to one side of the sliding block 410, the pair of guide rods 412 are slidably connected to a frame body 413, the frame body 413 is fixedly connected to the bottom end of the supporting plate 409, a second spring 414 is fixedly connected between the frame body 413 and the sliding block 410, a handle 415 is fixedly connected to the top surface of the sliding block 410. Specifically, when the butt joint rod 306 is pulled to rotate the horizontal rod 304, the handle 415 on the sliding block 410 is pulled to make the sleeve 408 on the shaft rod 407 disengage from the inside of the clamping groove 411, the sliding block 410 is pulled to make the guide rods 412 slide on the frame body 413, thereby increasing the stability of the sliding block 410 movement, when the sleeve 408 on the shaft rod 407 disengages from the inside of the clamping groove 411, the shaft rod 407 is pulled to make the pull plate 406 drive the rod body 403 to rotate, the rotation of the rod body 403 makes the pressing plate 404 rotate, thereby facilitating the sliding of the butt joint rod 306 in the movable groove 405, thereby facilitating the movement of the butt joint rod 306 to drive the horizontal rod 304 on the arm plate 305 to rotate, and the clamping column 315 on the side plate 314 enters the inside of the side groove 301. The working principle of the application is that when the lower seat 1 and the upper seat 101 are assembled, the positioning assembly makes the upper seat 101 attached to the lower seat 1, aligns the lower cavity 2 on the lower seat 1 with the upper cavity 201, avoids the phenomenon that the parts are broken during the assembly of the parts in the lower cavity 2 and the upper cavity 201, and thereby affects the normal use of the lower seat 1 as a whole. The positioning groove 3 is arranged on the rear side of the upper seat 101, the positioning plate 302 is clamped in the positioning groove 3, so that the lower seat 1 and the upper seat 101 are aligned, when the positioning plate 302 moves into the positioning groove 3, the clamping column 315 slides along the edge of the positioning groove 3, the side groove 301 is arranged on the inner wall of the positioning groove 3, when the positioning plate 302 continuously enters the positioning groove 3, the clamping column 315 on the side plate 314 is clamped in the side groove 301 through the limiting assembly, so that the lower seat 1 and the upper seat 101 are preliminarily positioned, and the deviation is avoided; When the cross rod 304 rotates by pulling the butt joint rod 306, the handle 415 on the sliding block 410 is pulled to make the sleeve 408 on the shaft rod 407 separate from the inside of the clamping groove 411, the sliding block 410 is pulled to make the guide rod 412 slide on the frame body 413, so that the stability of the sliding block 410 is improved, when the sleeve 408 on the shaft rod 407 separates from the inside of the clamping groove 411, the shaft rod 407 is pulled to make the pull plate 406 drive the rod body 403 to rotate, the rotation of the rod body 403 makes the pressing plate 404 rotate, so that the butt joint rod 306 slides in the movable groove 405, so that the butt joint rod 306 drives the cross rod 304 on the arm plate 305 to rotate, and the clamping column 315 on the side plate 314 enters the inside of the side groove 301. Finally, it should be noted that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application is described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A self-positioning structure for the upper and lower cavities of a ring-shaped device, characterized in that, include The lower seat (1) has an upper seat (101) installed on its top surface. A connector (102) is detachably installed on the middle side of the lower seat (1). A lower magnetic circuit cover plate (103) is fixedly installed on the bottom surface of the lower seat (1). Threaded holes (104) are opened at the four corners of the bottom surface of the lower seat (1). An upper magnetic circuit cover plate (105) is provided at the top of the upper seat (101). Screws (106) are inserted at the four corners of the upper magnetic circuit cover plate (105). The bottom end of the screws (106) is threadedly connected to the threaded holes (104) through the upper seat (101). It also includes component units, positioning components and limiting components. The component units are disposed inside the lower seat (1) and the upper seat (101) for use in conjunction with the lower seat (1) as a whole. The positioning components are disposed at the rear side of the upper seat (101) for installation and use. The limiting components are disposed at the middle rear side of the lower seat (1) for use in conjunction with the positioning components.

2. The self-positioning structure of the upper and lower cavities of a circulator according to claim 1, characterized in that: The component unit includes a lower cavity (2) opened inside the lower seat (1), and an upper cavity (201) opened inside the upper seat (101). The lower cavity (2) and the upper cavity (201) are interconnected. A first ferrite (202), a first uniform magnetic sheet (203) and a first permanent magnet (204) are placed in sequence inside the lower cavity (2). A dielectric block (205) is installed inside the first ferrite (202). A center conductor (206) is provided at the top of the dielectric block (205). A second ferrite (207) is provided at the top of the center conductor (206).

3. The self-positioning structure of the upper and lower cavities of a ring-shaped device according to claim 2, characterized in that: A second uniform magnetic sheet (208) is provided on the bottom surface of the upper cavity (201), and a second permanent magnet (209) is provided inside the upper cavity (201). The second permanent magnet (209) is located on the top surface of the second uniform magnetic sheet (208).

4. The self-positioning structure of the upper and lower cavities of a circulator according to claim 2, characterized in that: The positioning component includes a pair of positioning grooves (3) located on the rear side of the upper seat (101). Side grooves (301) are provided on both sides of the inner wall of the pair of positioning grooves (3). The side grooves (301) and the positioning grooves (3) are interconnected. A positioning plate (302) is installed inside the positioning groove (3). Through grooves (303) corresponding to the side grooves (301) are provided on both sides of the positioning plate (302).

5. The self-positioning structure of the upper and lower cavities of a ring-shaped device according to claim 4, characterized in that: The positioning plate (302) is rotatably connected to a crossbar (304) at its lateral position. A pair of arm plates (305) are fixedly connected to the crossbar (304). The other end of the pair of arm plates (305) is rotatably connected to a docking rod (306). A pair of push plates (307) are rotatably connected to the docking rod (306).

6. The self-positioning structure of the upper and lower cavities of a circulator according to claim 5, characterized in that: The other end of the push plate (307) is rotatably connected to the fixed column (308). One end of the fixed column (308) is fixedly connected to the middle of the side wall of the sleeve block (309). The sleeve block (309) is slidably connected to the slide rod (310) in the longitudinal position. One end of the slide rod (310) is fixedly connected to a collar (311), and the other end of the slide rod (310) is fixedly connected to the first bearing seat (312). The first bearing seat (312) is fixedly connected to the positioning plate (302). At the middle position of the slide bar (310), a first spring (313) is sleeved on the slide bar (310). The two ends of the first spring (313) are fixedly connected to one side of the sleeve block (309) and one side of the collar (311), respectively. The two ends of the crossbar (304) are fixedly connected to the side plates (314). The other end of the side plate (314) is fixedly connected to the locking post (315). One end of the locking post (315) is locked inside the side groove (301) through the through groove (303).

7. The self-positioning structure of the upper and lower cavities of a ring-shaped device according to claim 5, characterized in that: The limiting component includes an L-shaped plate (4) fixedly connected to the positioning plate (302). The L-shaped plate (4) is attached to the rear side of the lower seat (1). A pair of L-shaped plates (4) are provided. A horizontal plate (401) is fixedly connected between the pair of L-shaped plates (4). The horizontal plate (401) is fixedly installed on the rear side of the lower seat (1) by bolts.

8. The self-positioning structure of the upper and lower cavities of a circulator according to claim 7, characterized in that: A pair of second bearings (402) are fixedly connected to the surface of the horizontal plate (401). A rod (403) is rotatably connected to the pair of second bearings (402). A pressure plate (404) is fixedly connected to both ends of the rod (403) in a vertical direction. A movable groove (405) is opened at the other end of the pressure plate (404). The connecting rod (306) is slidably connected inside the movable groove (405).

9. The self-positioning structure of the upper and lower cavities of a ring-shaped device according to claim 8, characterized in that: A pair of pull plates (406) are fixedly connected to the middle position of the movable groove (405), and a shaft (407) is fixedly connected between the other ends of the pair of pull plates (406). A sleeve (408) is rotatably connected to the shaft (407). A support plate (409) is fixedly connected to the middle position of one side of the horizontal plate (401). A slider (410) is slidably connected to the support plate (409). A slot (411) is provided on the slider (410), and the sleeve (408) is engaged inside the slot (411).

10. The self-positioning structure of the upper and lower cavities of a ring-shaped device according to claim 9, characterized in that: A pair of guide rods (412) are fixedly connected to one side of the slider (410). The pair of guide rods (412) are slidably connected to the frame (413). The bottom end of the frame (413) is fixedly connected to the support plate (409). A second spring (414) is fixedly connected between the frame (413) and the slider (410). A handle (415) is fixedly connected to the middle of the top surface of the slider (410).

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