Special portable diagnosis and treatment equipment for animal husbandry and veterinary

Abstract

The utility model discloses special portable diagnosis and treatment equipment for animal husbandry and veterinary, and relates to the technical field of portable diagnosis and treatment equipment, the special portable diagnosis and treatment equipment comprises a diagnosis and treatment box assembly provided with a box body and an operation table, and a dismounting assembly comprises an elliptical sliding hole, a rotating hole, a limiting column, an elliptical plate, a T-shaped column, a ring piece and a spring. And a fixing assembly for fixing livestock is arranged at the top of the outer wall of the T-shaped column. According to the medical diagnosis and treatment box, by arranging the dismounting and mounting assembly, when the medical diagnosis and treatment box assembly is folded, only the fixing assembly needs to be pressed, a T-shaped column slides downwards to extrude a spring and drive an oval plate to slide downwards, the oval plate is separated from a limiting column, then the fixing assembly is screwed, the T-shaped column rotates, and the oval plate is driven to rotate; at the moment, the fixing assembly can be taken down and stored through the pull-up dismounting and mounting assembly, through cooperation of the parts, the fixing assembly can be more conveniently dismounted and adjusted in a wider range, and the use feeling of the diagnosis and treatment box assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of portable diagnosis and treatment equipment, in particular to a special portable diagnosis and treatment equipment for animal husbandry and veterinary medicine. Background Art

[0002] With the development of the times, people's demand for various poultry meats has become more and more vigorous, so many livestock farms have been derived. However, when livestock farms are raising livestock, they often become sick due to various external reasons or the livestock's own reasons. Some diseases in livestock are contagious or very harmful. At this time, professional doctors are needed to treat the livestock. Therefore, animal husbandry veterinarians have emerged. Animal husbandry veterinarians are referred to as animal husbandry doctors. It is a combination of animal husbandry and veterinary majors, or a major that integrates animal husbandry and veterinary majors. Animal husbandry veterinarians are medical workers who diagnose and treat livestock.

[0003] Usually, animal husbandry veterinarians often need to go to farms to diagnose and treat livestock. However, when diagnosing and treating on farms, they need to treat the livestock according to their condition. Therefore, they will carry more medical equipment. Usually, animal husbandry veterinarians will use portable treatment boxes to carry medical equipment and medical drugs when they go out for consultation. At the same time, they can use portable medical boxes to fix some small poultry to facilitate diagnosis and treatment. However, the fixing components of existing treatment boxes are usually fixed on the outer wall of the top cover of the treatment box, and it is inconvenient to adjust the position and disassemble it, which affects the user experience of the treatment box. Utility Model Content

[0004] The utility model aims to provide a portable diagnosis and treatment device for animal husbandry and veterinary medicine in order to solve the problem that when the fixed components of the existing diagnosis and treatment box are stored, space waste will be generated, affecting the use space inside the diagnosis and treatment box, and providing a portable diagnosis and treatment device for animal husbandry and veterinary medicine.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a portable diagnosis and treatment device for animal husbandry and veterinary medicine, comprising a diagnosis and treatment box assembly having a box body and an operating table, wherein the operating table is rotatably connected to the top of the rear outer wall of the box body through a hinge, and a disassembly assembly is arranged on the top of the operating table, wherein the disassembly assembly comprises an elliptical sliding hole, a rotating hole, a limiting column, an elliptical plate, a T-shaped column, a ring sheet, and a spring;

[0006] The elliptical sliding holes are provided in plurality, and the plurality of elliptical sliding holes are arranged linearly at the top of the outer wall of the operating table and completely penetrate to the bottom of the outer wall of the operating table. The rotating hole is provided at the bottom of the outer wall of the operating table and communicates with the elliptical sliding hole. The limiting posts are provided in plurality, and the two limiting posts are symmetrically arranged and fixedly connected to the top of the inner wall of the rotating hole.

[0007] There are four elliptical plates, which are arranged linearly and rotatably connected to the top of the inner wall of the rotating hole. Two symmetrically distributed circular holes are arranged on the top of the outer wall of the elliptical plate, and the diameter of the inner wall of the circular hole is the same as the diameter of the outer wall of the limiting column;

[0008] The T-shaped column is fixedly connected to the top of the outer wall of the elliptical plate and slidably connected to the inner wall of the elliptical sliding hole. The ring piece is sleeved on the outer wall of the T-shaped column and fits with the top of the outer wall of the operating table. The spring is sleeved on the outer wall of the T-shaped column. The top of the spring is fixedly connected to the bottom of the outer wall of the top of the T-shaped column. The outer wall of the bottom end of the spring is fixedly connected to the top of the outer wall of the ring piece.

[0009] A fixing component for fixing livestock is arranged on the top of the outer wall of the T-shaped column.

[0010] As a further solution of the utility model: the diagnosis and treatment box assembly also includes a storage slot and legs;

[0011] There are two storage grooves, which are integrally formed on the left and right sides of the outer wall of the operating table. The top of the inner wall at the rear end of the storage groove is arc-shaped, and the support leg is rotatably connected to the inner wall at the rear end of the storage groove. The outer wall at the top of the support leg is semicircular and matches the inner wall of the storage groove.

[0012] As a further solution of the utility model: the fixing assembly further includes a sliding post, a sliding block, and a hand screw;

[0013] The slide column is fixedly connected to the top of the outer wall of the T-shaped column by a plastic welding process. The diameter of the outer wall of the slide column is smaller than the diameter of the outer wall of the top of the T-shaped column. The slider is sleeved on the outer wall of the slide column and is slidably connected to the slide column. The hand screw is arranged on the outer wall of the slider, is threadedly connected to the slider and penetrates to the inner wall of the slider. A threaded hole matching the hand screw is integrally formed inside the slider.

[0014] As a further solution of the utility model: the fixing assembly also includes a T-shaped rotating shaft, a rotating table, and a collar;

[0015] The T-shaped shaft is fixedly connected to the outer wall of the slider and is symmetrically distributed with the hand screws. The turntable is rotatably connected to the outer wall of the T-shaped shaft. The ring is fixedly connected to the outer wall of the turntable. The ring, turntable, T-shaped shaft, slider and hand screws are arranged linearly in sequence.

[0016] As a further solution of the utility model: the outer wall thickness of the elliptical plate is the same as the inner wall height of the rotating hole and the outer wall height of the limiting column, and the cross-sectional area of ​​the top of the outer wall of the elliptical plate is the same as the cross-sectional area of ​​the inner wall of the elliptical sliding hole.

[0017] As a further solution of the utility model: the height of the outer wall of the T-shaped column is greater than the sum of the height of the spring in the compressed state and the thickness of the outer wall of the operating table, so that when the T-shaped column is pressed, the top of the outer wall of the elliptical plate can be separated from the inner wall of the rotating hole.

[0018] As a further solution of the utility model: the outer wall diameter of the ring piece is larger than the inner wall width of the elliptical sliding hole, the outer diameter of the spring is smaller than the outer wall diameter of the ring piece, and the outer diameter of the spring is smaller than the outer wall diameter of the top end of the T-shaped column.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] By setting up the disassembly and assembly component, when folding the diagnosis and treatment box component, you only need to press the fixing component to make the T-shaped column slide down to squeeze the spring and drive the elliptical plate to slide down, so that the elliptical plate is separated from the limit column, so that the elliptical plate can rotate, and then twist the fixing component to make the T-shaped column rotate and drive the elliptical plate to rotate. When the elliptical plate rotates, it drives the spring and the ring piece to rotate. The ring piece prevents the spring from contacting the elliptical sliding hole and affecting the rotation. When the elliptical plate coincides with the elliptical sliding hole, release the fixing component, and the spring releases to push the T-shaped column to drive the elliptical plate to slide from the inside of the elliptical sliding hole and separate from the top of the elliptical sliding hole. At this time, the disassembly and assembly component and the fixing component can be stored. Through the cooperation of the above parts, the fixing component can be more conveniently disassembled and has a wider adjustment range, thereby improving the use experience of the diagnosis and treatment box component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 This is a bottom view of the diagnosis and treatment box assembly of the utility model;

[0023] Figure 3 This is a schematic diagram of the disassembly and assembly structure of the utility model;

[0024] Figure 4 It is a schematic diagram of the structure of the fixing component of the utility model.

[0025] In the figure: 1. diagnosis and treatment box assembly; 101. box body; 102. operating table; 103. storage slot; 104. leg; 2. disassembly and assembly assembly; 201. elliptical sliding hole; 202. rotating hole; 203. limiting column; 204. elliptical plate; 205. T-shaped column; 206. ring piece; 207. spring; 3. fixing assembly; 301. sliding column; 302. sliding block; 303. hand screw; 304. T-shaped rotating shaft; 305. turntable; 306. sleeve ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figures 1 to 4 In the embodiment of the utility model, a portable diagnosis and treatment device for animal husbandry and veterinary medicine includes a diagnosis and treatment box assembly 1 having a box body 101 and an operating table 102. The operating table 102 is rotatably connected to the top of the rear outer wall of the box body 101 through a hinge. A disassembly assembly 2 is arranged on the top of the operating table 102. The disassembly assembly 2 includes an elliptical sliding hole 201, a rotating hole 202, a limiting column 203, an elliptical plate 204, a T-shaped column 205, a ring sheet 206, and a spring 207;

[0028] There are multiple elliptical sliding holes 201, which are arranged linearly at the top of the outer wall of the operating table 102 and completely penetrate to the bottom of the outer wall of the operating table 102. The rotating hole 202 is arranged at the bottom of the outer wall of the operating table 102 and is connected to the elliptical sliding hole 201. There are two limiting columns 203, which are symmetrically arranged and fixedly connected to the top of the inner wall of the rotating hole 202. The operating table 102, the elliptical sliding hole 201, the rotating hole 202, and the limiting column 203 are integrally formed by high-strength plastic through an injection molding process.

[0029] There are four elliptical plates 204, which are arranged linearly and rotatably connected to the top of the inner wall of the rotating hole 202. Two symmetrically distributed circular holes are arranged on the top of the outer wall of the elliptical plate 204, and the diameter of the inner wall of the circular hole is the same as the diameter of the outer wall of the limiting column 203;

[0030] The T-shaped column 205 is fixedly connected to the top of the outer wall of the elliptical plate 204 and is slidably connected to the inner wall of the elliptical sliding hole 201. The ring piece 206 is sleeved on the outer wall of the T-shaped column 205 and fits with the top of the outer wall of the operating table 102. The spring 207 is sleeved on the outer wall of the T-shaped column 205. The top of the spring 207 is fixedly connected to the bottom of the outer wall of the top of the T-shaped column 205, and the outer wall of the bottom end of the spring 207 is fixedly connected to the top of the outer wall of the ring piece 206.

[0031] A fixing component 3 for fixing livestock is arranged on the top of the outer wall of the T-shaped column 205 .

[0032] In this embodiment: when folding the diagnosis and treatment box component 1, it is only necessary to press the fixing component 3 to make the T-shaped column 205 slide down to squeeze the spring 207 and drive the elliptical plate 204 to slide down, so that the elliptical plate 204 is separated from the limiting column 203, so that the elliptical plate 204 can rotate, and then twist the fixing component 3 to rotate the T-shaped column 205 and drive the elliptical plate 204 to rotate. When the elliptical plate 204 rotates, it drives the spring 207 and the ring piece 206 to rotate. The ring piece 206 prevents the spring 207 from contacting the elliptical sliding hole 201, causing the spring 207 to be unable to rotate and thus affecting the rotation of the disassembly and assembly component 2. When the elliptical plate 204 coincides with the elliptical sliding hole 201, the fixing component 3 is released, and the spring 207 releases the push The movable T-shaped column 205 slides up and drives the elliptical plate 204 to slide out from the inside of the elliptical sliding hole 201 and disengage from the elliptical sliding hole 201. At this time, the disassembly component 2 and the fixed component 3 can be stored, so that when the operating table 102 is rotated to the top of the box body 101 for folding and storage, a larger space will not be required due to the movement of the fixed component 3. At the same time, when the fixed component 3 needs to be installed, the disassembly component 2 can be operated in reverse, and the disassembly component 2 can be adjusted to a suitable position through the elliptical sliding hole 201 so that the fixed component 3 can be installed in a suitable position. Through the cooperation of the above parts, the fixed component 3 can be more conveniently disassembled and has a wider adjustment range, thereby improving the use experience of the diagnosis and treatment box component 1.

[0033] Please refer to Figure 1 , Figure 2 , the diagnosis and treatment box assembly 1 also includes a storage slot 103 and a leg 104;

[0034] There are two storage grooves 103, which are integrally formed on the left and right sides of the outer wall of the operating table 102. The top of the inner wall of the rear end of the storage groove 103 is arc-shaped, and the support leg 104 is rotatably connected to the inner wall of the rear end of the storage groove 103 through a rotating shaft. The outer wall of the top of the support leg 104 is semicircular and matches the inner wall of the storage groove 103.

[0035] In this embodiment: by providing the storage slot 103, when the operating table 102 is rotated to the top of the box body 101 for storage, the legs 104 can be stored inside the storage slot 103, thereby reducing the occupied space of the diagnosis and treatment box assembly 1;

[0036] By providing the supporting legs 104, when the operating platform 102 is rotated to the rear of the box body 101 and is in an open state, the supporting legs 104 can be supported by contact with the ground, so that the animal husbandry doctor can treat the livestock more conveniently.

[0037] Please refer to Figure 1 , Figure 3 , Figure 4 , the fixing assembly 3 includes a sliding column 301, a sliding block 302, and a hand screw 303;

[0038] The sliding column 301 is fixedly connected to the top of the outer wall of the T-shaped column 205 through a plastic parts welding process. The diameter of the outer wall of the sliding column 301 is smaller than the diameter of the outer wall of the top of the T-shaped column 205. The sliding block 302 is sleeved on the outer wall of the sliding column 301 and is slidably connected to the sliding column 301. The hand screw 303 is set on the outer wall of the sliding block 302, and is threadedly connected to the sliding block 302 and penetrates to the inner wall of the sliding block 302. The interior of the sliding block 302 is integrally formed with a threaded hole matching the hand screw 303.

[0039] In this embodiment, the height and angle of the fixing assembly 3 can be adjusted by providing a sliding column 301 and a sliding block 302 , and a hand screw 303 is provided so that the sliding block 302 and the sliding column 301 can be fixed by tightening the hand screw 303 .

[0040] Please refer to Figure 1 , Figure 3 , Figure 4 , the fixing assembly 3 also includes a T-shaped shaft 304, a turntable 305, and a collar 306;

[0041] The T-shaped shaft 304 is fixedly connected to the outer wall of the slider 302 and is symmetrically distributed with the hand screws 303. The turntable 305 is rotatably connected to the outer wall of the T-shaped shaft 304. The ring 306 is fixedly connected to the outer wall of the turntable 305. The ring 306, turntable 305, T-shaped shaft 304, slider 302, and hand screws 303 are arranged linearly in sequence.

[0042] In this embodiment, it should be supplemented that the diameter of the inner wall of the collar 306 can be adjusted by contraction and expansion, and when the livestock is fixed, the collar 306 is located at the lower part of the livestock's legs and feet, so that the livestock will provide an upward pulling force for the collar 306;

[0043] By providing the T-shaped rotating shaft 304 and the turntable 305, the collar 306 can be rotated in the vertical direction, so as to adjust the angle of the opening of the collar 306, so that when the livestock is fixed, the legs and feet of the livestock can be passed through the inner wall of the collar 306 and tightened, so as to fix the position of the livestock, making it convenient for the animal husbandry doctor to treat the livestock, and the collar 306 can be rotated to adapt to the posture of the livestock in the fixed state.

[0044] Please refer to Figure 2 The outer wall thickness of the elliptical plate 204 is the same as the inner wall height of the rotating hole 202 and the outer wall height of the limiting column 203 , and the cross-sectional area of ​​the top of the outer wall of the elliptical plate 204 is the same as the inner wall cross-sectional area of ​​the elliptical sliding hole 201 .

[0045] In this embodiment: the outer wall thickness of the elliptical plate 204 is the same as the inner wall height of the rotating hole 202 and the outer wall height of the limiting column 203, so that the elliptical plate 204 can be received in the rotating hole 202, and the rotation of the elliptical plate 204 is limited by the outer wall of the limiting column 203 and the inner wall of the rotating hole 202, thereby locking the rotation of the disassembly assembly 2, and the cross-sectional area of ​​the top of the outer wall of the elliptical plate 204 is the same as the cross-sectional area of ​​the inner wall of the elliptical sliding hole 201, so that the elliptical plate 204 can slide in the elliptical sliding hole 201, thereby realizing the installation and disassembly of the disassembly assembly 2.

[0046] Please refer to Figure 1 The outer wall height of the T-shaped column 205 is greater than the sum of the height of the spring 207 in the compressed state and the thickness of the outer wall of the operating table 102, so that when the T-shaped column 205 is pressed, the top of the outer wall of the elliptical plate 204 can be separated from the inner wall of the rotating hole 202.

[0047] In this embodiment: the outer wall height of the T-shaped column 205 is greater than the sum of the height of the spring 207 in the compressed state and the outer wall thickness of the operating table 102, so that when the T-shaped column 205 is pressed, the top of the outer wall of the elliptical plate 204 can be separated from the inner wall of the rotating hole 202, so that the elliptical plate 204 can be rotated, thereby realizing the disassembly and installation of the disassembly assembly 2.

[0048] Please refer to Figure 1 , Figure 3 , Figure 4 The outer diameter of the ring piece 206 is larger than the inner wall width of the elliptical sliding hole 201 , the outer diameter of the spring 207 is smaller than the outer diameter of the ring piece 206 , and the outer diameter of the spring 207 is smaller than the outer wall diameter of the top of the T-shaped column 205 .

[0049] In this embodiment: the outer wall diameter of the ring piece 206 is larger than the inner wall width of the elliptical sliding hole 201, so that when the elliptical plate 204 slides into the elliptical sliding hole 201, the ring piece 206 will contact the top of the outer wall of the operating table 102 and slide upward, thereby squeezing the spring 207;

[0050] Because the outer diameter of spring 207 is smaller than the outer wall diameter of ring piece 206, and the outer diameter of spring 207 is smaller than the outer wall diameter of the top of T-shaped column 205, the elastic force of spring 207 is respectively distributed between ring piece 206 and T-shaped column 205, thereby achieving the fit between ring piece 206 and the top of the outer wall of operating table 102, so that T-shaped column 205 is always in an upward movement trend. At the same time, when livestock is fixed to the inner wall of ring 206, the legs and feet of livestock provide an upward pulling force to the fixing component 3 by pulling the ring 206, so that the livestock will not drive the T-shaped column 205 to slide downward when moving around, so that the up and down sliding of T-shaped column 205 is limited by the fit between elliptical plate 204 and the top of the inner wall of rotating hole 202, thereby achieving the locking of disassembly and assembly component 2 in the vertical direction.

[0051] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A portable diagnostic and treatment device for animal husbandry and veterinary medicine, comprising a diagnostic and treatment box assembly (1) having a box body (101) and an operating table (102), wherein the operating table (102) is rotatably connected to the top of the rear outer wall of the box body (101), characterized in that: The top of the operating table (102) is provided with a disassembly assembly (2), and the disassembly assembly (2) comprises an elliptical sliding hole (201), a rotating hole (202), a limiting column (203), an elliptical plate (204), a T-shaped column (205), a ring sheet (206), and a spring (207); The elliptical sliding holes (201) are provided in plurality, and the plurality of elliptical sliding holes (201) are arranged linearly at the top of the outer wall of the operating table (102) and completely penetrate to the bottom of the outer wall of the operating table (102); the rotating hole (202) is arranged at the bottom of the outer wall of the operating table (102) and communicates with the elliptical sliding holes (201); and the two limiting columns (203) are provided, and the two limiting columns (203) are symmetrically arranged and fixedly connected to the top of the inner wall of the rotating hole (202); Four elliptical plates (204) are provided, and the four elliptical plates (204) are linearly arranged and rotatably connected to the top of the inner wall of the rotating hole (202). Two symmetrically distributed circular holes are provided on the top of the outer wall of the elliptical plate (204), and the diameter of the inner wall of the circular hole is the same as the diameter of the outer wall of the limiting column (203); The T-shaped column (205) is fixedly connected to the top of the outer wall of the elliptical plate (204) and is slidably connected to the inner wall of the elliptical sliding hole (201); the ring plate (206) is sleeved on the outer wall of the T-shaped column (205) and fits with the top of the outer wall of the operating table (102); the spring (207) is sleeved on the outer wall of the T-shaped column (205); the top of the spring (207) is fixedly connected to the bottom of the outer wall of the top of the T-shaped column (205); and the outer wall of the bottom end of the spring (207) is fixedly connected to the top of the outer wall of the ring plate (206); A fixing component (3) for fixing livestock is arranged on the top of the outer wall of the T-shaped column (205).

2. A portable diagnostic and treatment device for animal husbandry and veterinary medicine according to claim 1, characterized in that: The diagnosis and treatment box assembly (1) further comprises a storage slot (103) and supporting legs (104); Two storage grooves (103) are provided, and the two storage grooves (103) are integrally formed on the left and right sides of the outer wall of the operating table (102); the top of the inner wall at the rear end of the storage groove (103) is arc-shaped; the support leg (104) is rotatably connected to the inner wall at the rear end of the storage groove (103) via a rotating shaft; the outer wall at the top of the support leg (104) is semicircular and matches the inner wall of the storage groove (103).

3. The portable diagnostic and treatment equipment for animal husbandry and veterinary medicine according to claim 1 is characterized in that: The fixing assembly (3) comprises a sliding column (301), a sliding block (302), and a hand screw (303); The slide column (301) is fixedly connected to the top of the outer wall of the T-shaped column (205) by a plastic parts welding process. The outer wall diameter of the slide column (301) is smaller than the outer wall diameter of the top of the T-shaped column (205). The slider (302) is sleeved on the outer wall of the slide column (301) and is slidably connected to the slide column (301). The hand screw (303) is arranged on the outer wall of the slider (302) and is threadedly connected to the slider (302) and penetrates the inner wall of the slider (302). The slider (302) is integrally formed with a threaded hole matching the hand screw (303).

4. The portable diagnostic and treatment equipment for animal husbandry and veterinary medicine according to claim 3 is characterized in that: The fixing assembly (3) further comprises a T-shaped rotating shaft (304), a rotating table (305), and a collar (306); The T-shaped rotating shaft (304) is fixedly connected to the outer wall of the slider (302) and is symmetrically distributed with the hand screw (303). The turntable (305) is rotatably connected to the outer wall of the T-shaped rotating shaft (304). The collar (306) is fixedly connected to the outer wall of the turntable (305). The collar (306), the turntable (305), the T-shaped rotating shaft (304), the slider (302), and the hand screw (303) are linearly arranged in sequence.

5. The portable diagnostic and treatment equipment for animal husbandry and veterinary medicine according to claim 1 is characterized in that: The thickness of the outer wall of the elliptical plate (204) is the same as the height of the inner wall of the rotating hole (202) and the height of the outer wall of the limiting column (203), and the cross-sectional area of ​​the top of the outer wall of the elliptical plate (204) is the same as the cross-sectional area of ​​the inner wall of the elliptical sliding hole (201).

6. The portable diagnostic and treatment equipment for animal husbandry and veterinary medicine according to claim 1, characterized in that: The height of the outer wall of the T-shaped column (205) is greater than the sum of the height of the spring (207) in a compressed state and the thickness of the outer wall of the operating table (102), so that when the T-shaped column (205) is pressed, the top of the outer wall of the elliptical plate (204) can be separated from the inner wall of the rotating hole (202).

7. The portable diagnostic and treatment equipment for animal husbandry and veterinary medicine according to claim 1, characterized in that: The outer wall diameter of the ring piece (206) is larger than the inner wall width of the elliptical sliding hole (201), the outer diameter of the spring (207) is smaller than the outer wall diameter of the ring piece (206), and the outer diameter of the spring (207) is smaller than the outer wall diameter of the top end of the T-shaped column (205).

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