Cleaning structure for cat litter basin

Abstract

The utility model is applicable to the technical field of cat litter basins, and provides a cleaning structure for a cat litter basin, which comprises a bottom plate, a placing groove is arranged at the position of an inner cavity of the bottom plate close to the center of the top, and cavities are arranged at the positions of the left side and the right side of the inner cavity of the bottom plate close to the center. According to the cat litter cleaning device, the guide plate and the guide plate sleeve can drive the spray pipe to move in a cross track shape to adjust the position of the spray pipe, so that the effect of adjusting the position of the spray pipe is achieved, the spray pipe can conveniently clean different parts of cat litter of different specifications, and through the elastic reset function of the two reset springs, the cleaning efficiency is improved. And the two reset springs rapidly drive the two clamping plates to be folded to make contact with the side walls of the cat litter basins of different specifications, so that the cat litter basins of different specifications can be rapidly fixed for cleaning operation, and operation by a user is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of cat litter boxes, in particular to a cleaning structure for a cat litter box. Background Art

[0002] With the rapid development of the economic level, the proportion of pet cats in households has gradually increased, and families with pet cats are usually equipped with cat litter boxes. Pet cats are clean pets. With a certain degree of training, cat litter boxes can be used to collect the feces discharged by pet cats to avoid dirtying the indoor space. At the same time, some cat-raising families will also equip their homes with cat litter box cleaning devices to facilitate the cleaning of the cat litter box.

[0003] The nozzle position of the conventional cleaning device is fixed, so it is not possible to quickly spray water to clean different parts of cat litter boxes of different specifications. In addition, the fixing of the conventional cleaning device is relatively cumbersome, resulting in the user being unable to conveniently fix cat litter boxes of different specifications for cleaning operations. Utility Model Content

[0004] The utility model provides a cleaning structure for a cat litter box, aiming to solve the problem that the nozzle position of the existing cleaning device is fixed and cannot spray water to clean different parts of cat litter boxes of different specifications, and cannot conveniently fix cat litter boxes of different specifications for cleaning operations.

[0005] The utility model is achieved in this way. A cleaning structure for a cat litter box comprises a bottom plate, wherein a placement groove is provided at a cavity of the bottom plate near the center of the top, cavities are provided at the left and right sides of the cavity near the center, and sliding rods are commonly connected to the inner walls of the two cavities near the centers of the upper and lower sides, and slide plates are commonly sleeved on the two slide bars located on the left and right sides near the adjacent ends, and abutment rods are connected at the adjacent sides of the two slide bars near the center, through holes are provided at the cavity of the bottom plate near the centers of the left and right sides, and the two through holes are connected to the placement grooves, and the adjacent ends of the two abutment rods penetrate the adjacent through hole cavities and are connected to clamping plates, a nozzle is provided at the top of the bottom plate near the center, a connecting pipe is connected to the left side of the nozzle near the center, and an adjusting component is provided at the top of the nozzle; the adjusting component comprises an adjusting box arranged at the top of the nozzle, a connecting rod is provided at the bottom of the adjusting box near the center, and the bottom end of the connecting rod is connected to the top of the nozzle near the center.

[0006] Preferably, an L-shaped rod is connected to the left side of the adjustment box near the center of the front and rear sides, and the two L-shaped rods are symmetrically arranged front to back with the center of the inner cavity of the adjustment box as the symmetry axis, and the longer ends of the L-shaped structures of the two L-shaped rods are respectively connected to the left side of the top of the base plate near the front and rear sides.

[0007] Preferably, the inner walls of the adjustment box are commonly connected with partition plates near the left and right sides, and the adjacent sides of the two partition plates are commonly movably connected with a screw rod 1 near the top of the front side, a guide plate is sleeved on the screw rod 1 near the center, a first screw hole is opened in the inner cavity of the guide plate near the center of the front side, and an internal thread matching the screw rod 1 is opened on the inner wall of the first screw hole, a limiting hole is opened in the inner cavity of the guide plate near the center of the rear side, the inner cavity of the limiting hole is movably connected to a limiting rod, the left and right ends of the limiting rod both pass through the inner cavity of the limiting hole, and the left and right ends of the limiting rod are respectively The side adjacent to the partition plate is connected near the top of the rear side, and the bottom of the guide plate is connected to a fixed plate near the center of the front and rear sides. The two adjacent sides of the two fixed plates are movably connected with a threaded rod two near the center. A guide sleeve is sleeved on the threaded rod two near the center. A square groove is provided at the bottom of the adjustment box near the center of the front side. The top of the connecting rod passes through the inner cavity of the square groove and is connected to the bottom of the guide sleeve near the center. A second screw hole is provided near the center of the inner cavity of the guide sleeve, and an internal thread matching the second threaded rod is provided on the inner wall of the second screw hole.

[0008] Preferably, motor 2 is connected to the inner wall on the right side of the regulating box near the front top, and a first rotating hole is opened in the inner cavity of the partition plate on the right side near the front top. The left end of the power output shaft of motor 2 passes through the inner cavity of the first rotating hole and is connected to the right end of screw 1 near the center.

[0009] Preferably, a connecting rod is connected to the second rear end of the threaded rod near the center, and a circular hole is opened near the center of the inner cavity of the fixing plate located at the rear side, the rear end of the connecting rod passes through the inner cavity of the circular hole and is connected to the driven bevel gear, and a rotating rod is provided on the rear side of the driven bevel gear, and the left and right ends of the rotating rod are respectively movably connected to the adjacent partition plate near the center of the inner cavity of the adjusting box near the rear center, and a slideway is opened near the center at the bottom of the rotating rod near the center, and a driving bevel gear is sleeved on the rotating rod near the center, and a first sliding hole matching the rotating rod is opened near the center of the inner cavity of the driving bevel gear near the center, and the inner wall of the bottom of the first sliding hole is connected to a sliding block near the center, and the sliding block is movably connected in the slideway, and a connecting plate is sleeved on the rotating rod near the center, and the left side of the connecting plate is connected to the right side of the rear side of the guide plate near the front side, and the left side of the connecting plate is movably connected to the right side of the driving bevel gear, and a second sliding hole matching the rotating rod is opened near the center of the inner cavity of the connecting plate

[0010] Preferably, a motor is connected to the right inner wall of the regulating box near the rear center, and a second rotating hole is opened in the inner cavity of the partition plate on the right side near the rear center. The left end of the power output shaft of the motor passes through the inner cavity of the second rotating hole and is connected to the right end of the rotating rod near the center.

[0011] Preferably, the two cavities are connected with return springs near the center on the side away from the center of the bottom plate inner cavity, and adjacent ends of the two return springs are connected to the adjacent slides near the center on the side away from the center of the bottom plate inner cavity.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0013] By conveniently driving the guide plate to move left and right and the guide sleeve to move forward and backward, the guide plate and the guide plate sleeve can drive the nozzle to move in a cross track shape to adjust the position of the nozzle, thereby achieving the effect of adjusting the position of the nozzle, which is convenient for the nozzle to clean different parts of cat litter of different specifications, and through the elastic reset function of the two reset springs, the two reset springs quickly drive the two clamping plates to close and contact the side walls of cat litter boxes of different specifications, so that cat litter boxes of different specifications can be quickly fixed for cleaning operations, which is convenient for users to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0015] Figure 2 It is a three-dimensional structural schematic diagram of the component adjustment box of the utility model;

[0016] Figure 3 It is a main structural schematic diagram of the utility model;

[0017] Figure 4 This is a bottom view of the structure of the component adjustment box of the utility model;

[0018] Figure 5 The utility model Figure 4 Enlarged view of point A in the middle.

[0019] In the figure: 1. bottom plate; 2. L-shaped rod; 3. adjustment assembly; 31. adjustment box; 32. connecting rod; 33. partition plate; 34. limit rod; 35. rotating rod; 36. guide plate; 37. motor 1; 38. motor 2; 39. screw rod 1; 310. fixing plate; 311. threaded rod 2; 312. guide sleeve; 313. driven bevel gear; 314. driving bevel gear; 315. connecting plate; 4. nozzle; 5. connecting pipe; 6. clamping plate; 7. push rod; 8. slide plate; 9. return spring; 10. slide rod. DETAILED DESCRIPTION

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0021] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0022] The utility model embodiment provides a cleaning structure for a cat litter box, such as Figure 1-5 As shown, it includes a bottom plate 1, a placement groove is opened near the top center of the inner cavity of the bottom plate 1, cavities are opened near the center on the left and right sides of the inner cavity of the bottom plate 1, and sliding rods 10 are commonly connected to the inner walls of the left and right sides of the two cavities near the centers of the upper and lower sides. Slide plates 8 are commonly sleeved on the two sliding rods 10 located on the left and right sides near the adjacent ends, and the adjacent sides of the two slide plates 8 are connected to the support rods 7 near the center. Through holes are opened near the left and right centers of the inner cavity of the bottom plate 1, and the two through holes are connected to the placement grooves. The adjacent ends of the two support rods 7 pass through the adjacent through-hole cavities and are connected to the clamping plates 6. A nozzle 4 is arranged near the center of the top of the bottom plate 1, a connecting pipe 5 is connected to the left side of the nozzle 4 near the center, and an adjusting component 3 is arranged at the top of the nozzle 4; the adjusting component 3 includes an adjusting box 31 arranged at the top of the nozzle 4, a connecting rod 32 is arranged at the bottom of the adjusting box 31 near the center, and the bottom end of the connecting rod 32 is connected to the top of the nozzle 4 near the center.

[0023] It should be noted that, since the nozzle position of the existing cleaning device is fixed, it is not possible to spray water to clean different parts of cat litter boxes of different sizes, and it is not possible to conveniently fix cat litter boxes of different sizes for cleaning operations. Therefore, in order to solve the problems encountered during the use of the existing cleaning device, the present solution solves the problem that the nozzle position of the existing cleaning device is fixed and it is not possible to spray water to clean different parts of cat litter boxes of different sizes, and it is not possible to conveniently fix cat litter boxes of different sizes for cleaning operations by adding an adjustment component 3 on the top of the base plate 1 and adding two clamping plates 6 to the inner cavity of the placement groove on the base plate 1.

[0024] In a further preferred embodiment of the present invention, Figure 1 and 3 As shown, L-shaped rods 2 are connected to the left side of the adjustment box 31 near the center of the front and rear sides. The two L-shaped rods 2 are symmetrically arranged front to back with the center of the inner cavity of the adjustment box 31 as the symmetry axis, and the longer ends of the L-shaped structures of the two L-shaped rods 2 are respectively connected to the top left side of the base plate 1 near the front and rear sides.

[0025] In this embodiment, by connecting two L-shaped rods 2 on the left side of the adjustment box 31 , the adjustment box 31 can be firmly fixed on the bottom plate 1 through the two L-shaped rods 2 for use.

[0026] In a further preferred embodiment of the present invention, Figure 1-5 As shown, the inner wall of the adjustment box 31 near the left and right sides are commonly connected with a partition plate 33, and the adjacent side of the two partition plates 33 is commonly movably connected with a screw rod 39 near the top of the front side. A guide plate 36 is sleeved on the screw rod 39 near the center. A first screw hole is opened in the inner cavity of the guide plate 36 near the center of the front side, and an internal thread matching the screw rod 39 is opened on the inner wall of the first screw hole. A limiting hole is opened in the inner cavity of the guide plate 36 near the center of the rear side. The inner cavity of the limiting hole is movably connected with a limiting rod 34. The left and right ends of the limiting rod 34 both penetrate the inner cavity of the limiting hole, and the left and right ends of the limiting rod 34 are respectively connected to the partition plate 3 The two fixing plates 310 are connected to each other at the center of the front and rear sides of the guide plate 36. The two fixing plates 310 are connected to each other at the center of the two fixing plates 310 ...

[0027] In this embodiment, when cleaning cat litter boxes of different specifications, the staff first connects the connecting pipe 5 to the pump body, so that the pump body can transport water to the inside of the spray pipe 4 through the connecting pipe 5, and then sprays water through the spray pipe 4 to clean the cat litter boxes of different specifications. At the same time, when cleaning different parts of the inside of the cat litter boxes of different specifications, the user drives the screw rod 1 39 and the threaded rod 2 311 to rotate forward or reversely, so that the screw rod 1 39 can drive the guide plate 36 to slide left and right on the limit rod 34, thereby driving the spray pipe 4 to move left and right to clean different parts of the cat litter boxes of different specifications at horizontal positions. When the threaded rod 2 311 rotates forward or reversely, the threaded rod 2 311 can drive the spray pipe 4 to move forward and backward through the guide sleeve 312 to clean different parts of the cat litter boxes of different specifications at vertical positions, so that the spray pipe 4 achieves the purpose of cleaning different parts of the cat litter boxes of different specifications.

[0028] In a further preferred embodiment of the present invention, Figure 4 As shown, a motor 2 38 is connected to the right inner wall of the regulating box 31 near the front top, and a first rotating hole is opened in the inner cavity of the partition plate 33 on the right side near the front top. The left end of the power output shaft of the motor 2 38 passes through the inner cavity of the first rotating hole and is connected to the right end of the screw 1 39 near the center.

[0029] In this embodiment, the user starts the motor 2 38 through an external power supply. The motor 2 38 can rotate forward or reverse when powered on, so that the motor 2 38 can quickly drive the screw 1 39 to rotate forward or reverse to adjust the position of the guide plate 36.

[0030] In a further preferred embodiment of the present invention, Figure 4 and 5 As shown, a connecting rod is connected to the rear end of the threaded rod 311 near the center, a circular hole is opened near the center of the inner cavity of the fixing plate 310 located at the rear side, the rear end of the connecting rod passes through the inner cavity of the circular hole and is connected to a driven bevel gear 313, a rotating rod 35 is provided at the rear side of the driven bevel gear 313, and the left and right ends of the rotating rod 35 are respectively movably connected to the adjacent partition plate 33 near the center of the inner cavity of the regulating box 31 near the center of the rear side, a slideway is opened near the center of the bottom of the rotating rod 35, and a driving bevel gear 314 is sleeved on the rotating rod 35 near the center, A first sliding hole matching the rotating rod 35 is opened near the center of the inner cavity of the movable bevel gear 314, and a slider is connected to the inner wall of the bottom of the first sliding hole near the center, and the slider is movably connected in the slideway. A connecting plate 315 is sleeved on the rotating rod 35 near the center, and the left side of the connecting plate 315 near the front side is connected to the right side of the rear side of the guide plate 36, and the left side of the connecting plate 315 near the center is movably connected to the right side of the driving bevel gear 314, and a second sliding hole matching the rotating rod 35 is opened near the center of the inner cavity of the connecting plate 315.

[0031] In this embodiment, when the guide plate 36 moves left and right, the slider can slide left and right in the slideway, so that the left and right movement of the guide plate 36 is not restricted. At the same time, when the rotating rod 35 rotates forward or reversely, the rotating rod 35 can drive the slider to rotate forward or reversely through the slideway, thereby driving the driving bevel gear 314 to rotate forward or reversely. When the driving bevel gear 314 rotates, it meshes with the driven bevel gear 313, thereby driving the driven bevel gear 313 to rotate forward or reversely, so that the driven bevel gear 313 can drive the threaded rod 311 to rotate forward or reversely to adjust the position of the guide sleeve 312, thereby achieving the purpose of adjusting the vertical position of the nozzle 4.

[0032] In a further preferred embodiment of the present invention, Figure 4 As shown, a motor 37 is connected to the inner wall of the right side of the regulating box 31 near the center of the rear side, and a second rotating hole is opened in the inner cavity of the partition plate 33 on the right side near the center of the rear side. The left end of the power output shaft of the motor 37 passes through the inner cavity of the second rotating hole and is connected to the right end of the rotating rod 35 near the center.

[0033] In this embodiment, the user starts the motor 1 37 through an external power source, and the motor 1 37 can rotate forward or reverse when powered on, so that the motor 1 37 can quickly drive the rotating rod 35 to rotate forward or reverse.

[0034] In a further preferred embodiment of the present invention, Figure 3 As shown, the two cavities are connected with return springs 9 near the center of the inner cavity away from the bottom plate 1, and the adjacent ends of the two return springs 9 are connected with the adjacent slide plates 8 near the center of the inner cavity away from the bottom plate 1.

[0035] In this embodiment, after cat litter boxes of different specifications are placed in the inner cavity of the placement groove, the two return springs 9 begin to extend outward after the external force disappears, so that the two return springs 9 can drive the adjacent slide plates 8 to slide toward the adjacent side on the two adjacent slide rods 10, so that the two slide plates 8 can smoothly drive the two clamping plates 6 to close toward the adjacent side through the two push rods 7 and contact the side walls of cat litter boxes of different specifications, thereby achieving the purpose of conveniently fixing cat litter boxes of different specifications for cleaning operations.

[0036] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the described action sequence, because according to the utility model, some steps may be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the utility model.

[0037] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0038] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0039] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A cleaning structure for a cat litter box, characterized in that: The invention comprises a bottom plate (1), wherein a placement groove is provided in the inner cavity of the bottom plate (1) near the center of the top, and cavities are provided in the inner cavity of the bottom plate (1) near the center on both sides, and the inner walls of the two cavities on the left and right sides near the centers of the upper and lower sides are commonly connected with sliding rods (10), and the two sliding rods (10) located on the left and right sides are commonly sleeved with slide plates (8) near the adjacent ends, and the adjacent sides of the two slide plates (8) are connected with push rods (7) near the center, and the inner cavity of the bottom plate (1) is provided with through holes near the centers of the left and right sides, and the two through holes are connected with the placement grooves, and the adjacent ends of the two push rods (7) penetrate the adjacent through hole cavities and are connected with clamping plates (6), and a nozzle (4) is provided near the center of the top of the bottom plate (1), and a connecting pipe (5) is connected to the left side of the nozzle (4) near the center, and an adjustment component (3) is provided at the top of the nozzle (4); The regulating assembly (3) comprises a regulating box (31) arranged at the top end of the nozzle (4); a connecting rod (32) is provided at the bottom of the regulating box (31) near the center, and the bottom end of the connecting rod (32) is connected to the top end of the nozzle (4) near the center.

2. A cat litter box cleaning structure as claimed in claim 1, characterized in that: The left side of the regulating box (31) is connected to an L-shaped rod (2) near the center of the front and rear sides. The two L-shaped rods (2) are symmetrically arranged front to back with the center of the inner cavity of the regulating box (31) as the symmetry axis, and the longer ends of the L-shaped structures of the two L-shaped rods (2) are respectively connected to the left side of the top of the bottom plate (1) near the front and rear sides.

3. A cat litter box cleaning structure as claimed in claim 1, characterized in that: The inner wall of the regulating box (31) is commonly connected with a partition plate (33) near the left and right sides, and the adjacent sides of the two partition plates (33) are commonly movably connected with a screw rod (39) near the top of the front side. A guide plate (36) is sleeved on the screw rod (39) near the center. A first screw hole is opened in the inner cavity of the guide plate (36) near the center of the front side, and an internal thread matching the screw rod (39) is opened on the inner wall of the first screw hole. A limiting hole is opened in the inner cavity of the guide plate (36) near the center of the rear side. The inner cavity of the limiting hole is movably connected with a limiting rod (34). The left and right ends of the limiting rod (34) both pass through the inner cavity of the limiting hole, and the left and right ends of the limiting rod (34) are respectively connected to the partition plate ( The two fixing plates (310) are connected to each other at the center of the front and rear sides on the adjacent side of the guide plate (36), and are movably connected to a second threaded rod (311) near the center of the two fixing plates (310). A guide sleeve (312) is sleeved on the second threaded rod (311) near the center. A square groove is provided at the bottom of the adjustment box (31) near the center of the front side. The top of the connecting rod (32) passes through the inner cavity of the square groove and is connected to the bottom of the guide sleeve (312) near the center. A second screw hole is provided in the inner cavity of the guide sleeve (312) near the center, and an internal thread matching the second threaded rod (311) is provided on the inner wall of the second screw hole.

4. A cat litter box cleaning structure as claimed in claim 3, characterized in that: The right inner wall of the regulating box (31) is connected to a second motor (38) near the front top, and the inner cavity of the partition plate (33) located on the right side is provided with a first rotating hole near the front top. The left end of the power output shaft of the second motor (38) passes through the inner cavity of the first rotating hole and is connected to the right end of the first screw (39) near the center.

5. A cat litter box cleaning structure as claimed in claim 3, characterized in that: A connecting rod is connected to the rear end of the second threaded rod (311) near the center. A circular hole is opened near the center of the inner cavity of the fixing plate (310) located at the rear side. The rear end of the connecting rod passes through the inner cavity of the circular hole and is connected to a driven bevel gear (313). A rotating rod (35) is provided at the rear side of the driven bevel gear (313). The left and right ends of the rotating rod (35) are respectively movably connected to the side of the inner cavity center of the adjacent partition plate (33) near the rear center of the regulating box (31). A slideway is opened near the center of the bottom of the rotating rod (35). A driving bevel gear (314) is sleeved on the rotating rod (35) near the center. A first sliding hole matching the rotating rod (35) is provided near the center of the inner cavity of the driving bevel gear (314); a sliding block is connected to the inner wall of the bottom of the first sliding hole near the center, and the sliding block is movably connected in the slideway; a connecting plate (315) is sleeved on the rotating rod (35) near the center; a left side of the connecting plate (315) near the front side is connected to a rear side of the guide plate (36) near the right side; a left side of the connecting plate (315) near the center is movably connected to the right side of the driving bevel gear (314); and a second sliding hole matching the rotating rod (35) is provided near the center of the inner cavity of the connecting plate (315).

6. A cat litter box cleaning structure as claimed in claim 5, characterized in that: A motor 1 (37) is connected to the inner wall of the right side of the regulating box (31) near the center of the rear side, and a second rotating hole is opened in the inner cavity of the partition plate (33) located on the right side near the center of the rear side. The left end of the power output shaft of the motor 1 (37) passes through the inner cavity of the second rotating hole and is connected to the right end of the rotating rod (35) near the center.

7. A cat litter box cleaning structure as claimed in claim 1, characterized in that: The two cavities are connected to a return spring (9) near the center of the inner cavity of the bottom plate (1) on one side away from the center of the inner cavity, and the adjacent ends of the two return springs (9) are connected to the adjacent slide plate (8) on the side away from the center of the inner cavity of the bottom plate (1) near the center.

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