A fluid pipeline rapid installation detection device

Abstract

The present invention discloses a fluid pipeline rapid installation detection device, including a coaxial mechanism, including a shell, a chassis connected to the shell, an inlet pipe arranged on one side of the chassis, an outlet pipe connected to one side of the inlet pipe, a trigger tube arranged on one side of the inlet pipe, a sliding groove opened on the shell, a limiting protrusion arranged in the sliding groove, a rotating groove arranged on the side of the shell, and a transmission component arranged on the inner side of the shell; the trigger mechanism includes a transmission component connected to the transmission component, an extension component connected to one side of the transmission component, and a conduction component connected to one side of the extension component. The steps of multiple trial connection or water filling test are reduced, and the pipeline connection process can be completed quickly and accurately, which significantly improves work efficiency and saves time and labor costs.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline installation, and in particular to a fluid pipeline rapid installation detection device. Background Art

[0002] The traditional pipeline connection method requires manual installation, tools and labor. When connecting two pipelines, due to the non-concentricity of the pipelines during installation, interface leakage caused by human installation errors is likely to occur. At the same time, a water filling test is required after the connection to confirm whether the connection is sealed, which will increase the workload and time cost. At present, many automatic connection technologies use some complex control systems and mechanical equipment (such as solenoid valves). These components are expensive and need to be frequently repaired and replaced. In view of the above problems, the present invention innovatively designs a fluid pipeline rapid installation detection device. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above problems existing in the existing fluid pipeline rapid installation detection device, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide a fluid pipeline rapid installation detection device.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a coaxial mechanism, including a shell, a chassis connected to the shell, an inlet pipe arranged on one side of the chassis, an outlet pipe connected to one side of the inlet pipe, a trigger tube arranged on one side of the inlet pipe, a sliding groove opened on the shell, a limiting protrusion arranged in the sliding groove, a rotating groove arranged on the side of the shell, and a transmission component arranged on the inner side of the shell; a trigger mechanism, including a transmission component connected to the transmission component, an extension component connected to one side of the transmission component, and a conduction component connected to one side of the extension component.

[0007] As a preferred solution of the fluid pipeline quick installation detection device described in the present invention, the transmission assembly includes a rotating gear rotatably arranged in the rotating groove, a helical gear plate rotatably arranged on the inner side of the shell, a vortex groove arranged on one side of the helical gear plate, and a concentric member slidably arranged in the sliding groove; the rotating gear is meshed with the helical gear plate.

[0008] As a preferred solution of the fluid pipeline rapid installation detection device described in the present invention, the concentric parts include a concentric slider slidably arranged in the sliding groove, a concentric through groove opened in the concentric slider, a guide sliding groove opened at the bottom of the concentric slider, a guide protrusion slidably arranged in the guide groove, and a contraction part arranged in the concentric through hole; the guide protrusion is in conflict with the vortex groove.

[0009] As a preferred solution of the fluid pipeline rapid installation detection device described in the present invention, the retracting part includes a V-shaped groove opened on the side of the concentric slider, an extrusion block slidably arranged in the concentric through groove, a retracting spring arranged between the extrusion block and the concentric through groove, and a support rod; the extrusion block is connected to the guide protrusion through the support rod.

[0010] As a preferred solution of the fluid pipeline quick installation detection device described in the present invention, the transmission component includes an inner gear plate arranged on the inner side of the bevel gear plate, a transmission gear rotatably arranged on the chassis, and an axial gear part connected to one side of the outlet pipe; the transmission gear is meshed with the inner gear plate.

[0011] As a preferred solution of the fluid pipeline quick installation detection device of the present invention, wherein: the shaft gear member includes a gear body arranged on one side of the outlet pipe, a hollow groove opened on the gear body, a connecting pipe arranged on one side of the gear body, and a sealing member arranged on the connecting pipe;

[0012] The transmission gear is meshed with the gear body.

[0013] As a preferred solution of the fluid pipeline rapid installation detection device described in the present invention, the sealing member includes a connecting protrusion arranged on the outside of the connecting pipe and a connecting groove arranged on one side of the inlet pipe; the connecting protrusion is slidably arranged in the connecting groove.

[0014] As a preferred solution of the fluid pipeline rapid installation detection device described in the present invention, wherein: the extension component includes an arc-shaped support block connected to the inner side of the inlet pipe, an arc-shaped mounting block connected to the inner side of the inlet pipe, an extension shaft arranged on the inner side of the inlet pipe, a guide groove opened on the extension shaft, a rotating block arranged at one end of the extension shaft, and a channel hole opened on the rotating block; the extension shaft is slidably arranged between the arc-shaped support block and the arc-shaped mounting block; the rotating block is slidably arranged in the inlet pipe.

[0015] As a preferred solution of the fluid pipeline rapid installation detection device described in the present invention, the arc-shaped installation block includes a clamping groove opened on the side of the arc-shaped installation block, and a clamping block arranged in the clamping groove; the clamping block conflicts with the guide groove.

[0016] As a preferred solution of the fluid pipeline rapid installation detection device described in the present invention, the conductive component includes a top plate slidably arranged in the trigger tube, a compression spring arranged on one side of the top plate, a through-hole plate connected to one end of the compression spring, and a connecting column arranged between the compression spring and the through-hole plate.

[0017] The beneficial effects of the present invention are as follows: through the cooperation between the concentric mechanism and the trigger mechanism, it is possible to achieve the process of quickly and accurately completing the pipeline connection without the need for multiple trial connection or water filling tests, significantly improving work efficiency, and saving time and labor costs. It can also reduce the difficulty of operation during pipeline installation, reduce the use of tools and labor, and improve work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 It is a schematic diagram of the overall structure of the fluid pipeline rapid installation detection device of the present invention.

[0020] Figure 2 It is a half-section view of the overall structure of the fluid pipeline quick installation detection device of the present invention.

[0021] Figure 3 This is a cross-sectional view of the overall structure of the fluid pipeline quick installation detection device of the present invention.

[0022] Figure 4 This is a schematic diagram of the shell structure of the fluid pipeline rapid installation detection device of the present invention.

[0023] Figure 5 This is a schematic diagram of the concentric member structure of the fluid pipeline rapid installation detection device of the present invention.

[0024] Figure 6 It is a front view schematic diagram of the concentric parts described in the fluid pipeline rapid installation detection device of the present invention.

[0025] Figure 7 It is a top view schematic diagram of the concentric members described in the fluid pipeline rapid installation detection device of the present invention.

[0026] Figure 8 This is a front view of the overall structure of the fluid pipeline quick installation detection device of the present invention.

[0027] Fig. 9 A side view of the shaft gear structure of the fluid pipeline quick installation detection device of the present invention.

[0028] Fig.10 This is an enlarged view of the shaft gear structure described in the fluid pipeline rapid installation detection device of the present invention.

[0029] Fig.11 This is a schematic diagram of the structure of the arc-shaped installation block described in the fluid pipeline rapid installation detection device of the present invention.

[0030] Fig.12 This is a schematic diagram of the seal structure of the fluid pipeline rapid installation detection device of the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] Example 1

[0036] Reference Figures 1 to 7 , provides a schematic diagram of the overall structure of a fluid pipeline rapid installation detection device, such as Figure 1A fluid pipeline rapid installation detection device includes a coaxial mechanism 100, including a shell 101, a chassis 102 connected to the shell 101, an inlet pipe 103 arranged on one side of the chassis 102, an outlet pipe 104 connected to one side of the inlet pipe 103, a trigger tube 105 arranged on one side of the inlet pipe 103, a sliding groove 106 opened on the shell 101, a limiting protrusion 107 arranged in the sliding groove 106, a rotating groove 108 arranged on the side of the shell 101, and a transmission component 109 arranged on the inner side of the shell 101; a trigger mechanism 200 includes a transmission component 201 connected to the transmission component 109, an extension component 202 connected to one side of the transmission component 201, and a conduction component 203 connected to one side of the extension component 202. In this embodiment, one end of the inlet pipe 103 is connected to the outlet pipe 104, and the other end of the inlet pipe 103 is connected to the trigger tube 105. The fluid cannot enter the inlet pipe 103 due to the effect of the conductive component 203 set in the trigger tube 105. The rotating transmission component 109 fixes the outlet pipe 104 and the pipeline connected to the outlet pipe 104. The transmission component 109 drives the extension component 202 to touch the conductive component 203. The conductive component 203 moves so that the fluid can pass through the conductive component 203, thereby entering the outlet pipe 104, and the rapid installation of the pipeline and the subsequent water filling test can be quickly realized.

[0037] Specifically, the transmission assembly 109 includes a rotating gear 109a rotatably disposed in the rotating groove 108, a helical toothed disc 109b rotatably disposed inside the housing 101, a vortex groove 109c disposed on one side of the helical toothed disc 109b, and a concentric member 109d slidably disposed in the sliding groove 106; the rotating gear 109a is meshed with the helical toothed disc 109b. In this embodiment, the rotating gear 109a is fixedly connected to the nut so that it can be rotated more conveniently. The rotating gear 109a rotates to drive the helical toothed disc 109b to rotate, and drives the vortex groove 109c fixedly disposed on the helical toothed disc 109b to rotate. The rotation of the vortex groove 109c can drive the concentric member 109d to move up and down in the sliding groove 106.

[0038] Furthermore, the concentric member 109d includes a concentric slider 109d-1 slidably disposed in the sliding groove 106, a concentric through groove 109d-2 provided in the concentric slider 109d-1, a guide sliding groove 109d-3 provided at the bottom of the concentric slider 109d-1, a guide protrusion 109d-4 slidably disposed in the guide groove 202d, and a contraction member 109d-5 provided in the concentric through groove 109d-2; the guide protrusion 109d-4 conflicts with the vortex groove 109c. In this embodiment, when the connecting tube 201c-3 is connected, due to the cooperation between the vortex groove 109c and the guide protrusion 109d-4, the rotating gear 109a is rotated, so that the concentric slider 109d-1 can move toward the center direction in the sliding groove 106.

[0039] Furthermore, the contraction member 109d-5 includes a V-shaped groove 109d-5a opened on the side of the concentric slider 109d-1, an extrusion block 109d-5b slidably set in the concentric through groove 109d-2, a contraction spring 109d-5c set between the extrusion block 109d-5b and the concentric through groove 109d-2, and a support rod 109d-5d; the extrusion block 109d-5b is connected to the guide protrusion 109d-4 through the support rod 109d-5d. In this embodiment, when the concentric slider 109d-1 moves toward the center, the extrusion block 109d-5b is squeezed with the pipe to be connected, and the slide bar set in the V-shaped groove 109d-5a slides, so that the extrusion block 109d-5b moves upward, and the guide protrusion 109d-4 connected to the extrusion block 109d-5b through the support rod 109d-5d moves upward. At this time, the rotation of the vortex groove 109c cannot drive the concentric member 109d to move up and down in the sliding groove 106. Therefore, the rotation of the rotating gear 109a only acts on the transmission component 201.

[0040] Operation process: The rotating gear 109a rotates to drive the bevel gear plate 109b to rotate, and drives the vortex groove 109c fixed on the bevel gear plate 109b to rotate. Due to the cooperation between the vortex groove 109c and the guide protrusion 109d-4, the rotating gear 109a can make the concentric slider 109d-1 move toward the center direction in the sliding groove 106. When the concentric slider 109d-1 moves toward the center direction, the extrusion block 109d-5b is squeezed with the pipe to be connected, and the slide bar set in the V-shaped groove 109d-5a slides, so that the extrusion block 109d-5b moves upward, and the guide protrusion 109d-4 connected to the extrusion block 109d-5b through the support rod 109d-5d moves upward. At this time, the rotating gear 109a only works on the transmission component 201. After the pipeline is installed, the water inlet test is performed.

[0041] Example 2

[0042] Reference Figures 1 to 3 9-12, this embodiment is different from the first embodiment in that: the transmission assembly 201 includes an inner toothed disc 201a disposed inside the helical toothed disc 109b, a transmission gear 201b rotatably disposed on the chassis 102, and a shaft gear member 201c connected to one side of the outlet pipe 104; the transmission gear 201b meshes with the inner toothed disc 201a. In this embodiment, when the helical toothed disc 109b rotates, it drives the inner toothed disc 201a at the same time, the inner toothed disc 201a drives the transmission gear 201b, and the transmission gear 201b drives the shaft gear member 201c.

[0043] Specifically, the shaft gear part 201c includes a gear body 201c-1 disposed on one side of the outlet pipe 104, a hollow groove 201c-2 opened on the gear body 201c-1, a connecting pipe 201c-3 disposed on one side of the gear body 201c-1, and a sealing member 201c-4 disposed on the connecting pipe 201c-3; the transmission gear 201b is meshed with the gear body 201c-1. In this embodiment, one side of the gear body 201c-1 is fixedly connected to the connecting pipe 201c-3, and the sealing member 201c-4 on the connecting pipe 201c-3 can be multiple, so as to improve its sealing performance.

[0044] Furthermore, the sealing member 201c-4 includes a connecting protrusion 201c-4a arranged on the outside of the connecting pipe 201c-3, and a connecting groove 201c-4b arranged on one side of the inlet pipe 103; the connecting protrusion 201c-4a is slidably arranged in the connecting groove 201c-4b.

[0045] The extension assembly 202 includes an arc-shaped support block 202a connected to the inner side of the inlet pipe 103, an arc-shaped installation block 202b connected to the inner side of the inlet pipe 103, an extension shaft 202c disposed on the inner side of the inlet pipe 103, a guide groove 202d provided on the extension shaft 202c, a rotation block 202e provided at one end of the extension shaft 202c, a channel hole 202f provided on the rotation block 202e, and a contact block 202g provided on one side of the rotation block 202e; the extension shaft 202c is slidably disposed between the arc-shaped support block 202a and the arc-shaped installation block 202b; and the rotation block 202e is slidably disposed in the inlet pipe 103. In this embodiment, the arc-shaped support block 202a and the arc-shaped installation block 202b are fixedly connected to the inner wall of the inlet pipe 103.

[0046] Preferably, the arc-shaped mounting block 202b includes a clamping groove 202b-1 provided on the side of the arc-shaped mounting block 202b, and a clamping block 202b-2 disposed in the clamping groove 202b-1; the clamping block 202b-2 conflicts with the guide groove 202d. In this embodiment, when the gear body 201c-1 rotates, the gear body 201c-1 and the extension shaft 202c are connected by an extendable sliding track, driving the extension shaft 202c to rotate, and since the clamping block 202b-2 conflicts with the guide groove 202d, the extension shaft 202c can rotate and extend, thereby squeezing the conductive component 203.

[0047] The rest of the structure is the same as that of Example 1

[0048] Operation process: When the bevel gear plate 109b rotates, it drives the inner gear plate 201a at the same time, the inner gear plate 201a drives the transmission gear 201b, and the transmission gear 201b drives the shaft gear 201c. When the gear body 201c-1 rotates, the gear body 201c-1 and the extension shaft 202c are connected by an extendable sliding track, driving the extension shaft 202c to rotate. Since the clamping block 202b-2 conflicts with the guide groove 202d, the extension shaft 202c can rotate and extend, thereby squeezing the transmission component 203.

[0049] Example 3

[0050] Reference Figures 1 to 3 8. This embodiment is different from the above embodiments in that: the conducting component 203 includes a top sheet 203a slidably disposed in the trigger tube 105, a compression spring 203b disposed on one side of the top sheet 203a, a through-hole plate 203c connected to one end of the compression spring 203b, and a connecting column 203d disposed between the compression spring 203b and the through-hole plate 203c. In this embodiment, when the fluid enters from the direction of the compression spring 203b, due to the effect of pressure, the top sheet 203a conflicts with the trigger tube 105, and the fluid cannot pass through the trigger tube 105. The extension shaft 202c extends out to squeeze the top sheet 203a, and the squeezing force is greater than the fluid pressure, so that the top sheet 203a is separated from the trigger tube 105, so that the fluid can pass through the trigger tube 105.

[0051] The rest of the structure is the same as that of Example 2.

[0052] Operation process: When the fluid enters from the direction of the compression spring 203b, due to the effect of pressure, the top sheet 203a conflicts with the trigger tube 105, and the fluid cannot pass through the trigger tube 105. The extension shaft 202c extends out to squeeze the top sheet 203a. The squeezing force is greater than the fluid pressure, thereby separating the top sheet 203a from the trigger tube 105, so that the fluid can pass through the trigger tube 105.

[0053] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, changes in orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of the element may be inverted or otherwise changed, and the nature or number or position of the discrete element may be altered or changed. Therefore, all such modifications are intended to be included within the scope of the present invention. The order or sequence of any process or method steps may be changed or reordered according to an alternative embodiment. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present invention. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0054] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment may not be described (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those features that are not relevant to implementing the invention).

[0055] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A fluid pipeline rapid installation detection device, characterized in that: include, A coaxial mechanism (100) comprises a housing (101), a chassis (102) connected to the housing (101), an inlet pipe (103) arranged on one side of the chassis (102), an outlet pipe (104) connected to one side of the inlet pipe (103), a trigger pipe (105) arranged on one side of the inlet pipe (103), a sliding groove (106) provided on the housing (101), a limiting protrusion (107) arranged in the sliding groove (106), a rotating groove (108) arranged on the side of the housing (101), and a transmission assembly (109) arranged on the inner side of the housing (101); A trigger mechanism (200) comprising a transmission component (201) connected to the transmission component (109), an extension component (202) connected to one side of the transmission component (201), and a conduction component (203) connected to one side of the extension component (202); The transmission assembly (109) comprises a rotating gear (109a) rotatably disposed in the rotating groove (108), a helical toothed disc (109b) rotatably disposed inside the housing (101), a vortex groove (109c) disposed on one side of the helical toothed disc (109b), and a concentric member (109d) slidably disposed in the sliding groove (106); The rotating gear (109a) is meshed with the helical gear plate (109b); The transmission assembly (201) comprises an inner gear disc (201a) arranged inside the helical gear disc (109b), a transmission gear (201b) rotatably arranged on the chassis (102), and a shaft gear member (201c) connected to one side of the outlet pipe (104); The transmission gear (201b) is meshed with the inner gear disc (201a); The shaft gear component (201c) comprises a gear body (201c-1) arranged on one side of the outlet pipe (104), a hollow groove (201c-2) opened on the gear body (201c-1), a connecting pipe (201c-3) arranged on one side of the gear body (201c-1), and a sealing component (201c-4) arranged on the connecting pipe (201c-3); The transmission gear (201b) is meshed with the gear body (201c-1); The extension component (202) comprises an arc-shaped support block (202a) connected to the inner side of the inlet pipe (103), an arc-shaped mounting block (202b) connected to the inner side of the inlet pipe (103), an extension shaft (202c) arranged on the inner side of the inlet pipe (103), a guide groove (202d) provided on the extension shaft (202c), a rotating block (202e) provided at one end of the extension shaft (202c), a channel hole (202f) provided on the rotating block (202e), and a contact block (202g) provided on one side of the rotating block (202e); The elongated shaft (202c) is slidably disposed between the arc-shaped support block (202a) and the arc-shaped mounting block (202b); The rotating block (202e) is slidably disposed in the inlet pipe (103).

2. The fluid pipeline rapid installation detection device according to claim 1, characterized in that: The concentric member (109d) comprises a concentric slider (109d-1) slidably disposed in the sliding groove (106), a concentric through groove (109d-2) opened in the concentric slider (109d-1), a guide sliding groove (109d-3) opened at the bottom of the concentric slider (109d-1), a guide protrusion (109d-4) slidably disposed in the guide groove (202d), and a contraction member (109d-5) disposed in the concentric through groove (109d-2); The guide protrusion (109d-4) is in conflict with the vortex groove (109c).

3. The fluid pipeline rapid installation detection device according to claim 2, characterized in that: The contraction member (109d-5) comprises a V-shaped groove (109d-5a) provided on the side of the concentric slider (109d-1), an extrusion block (109d-5b) slidably disposed in the concentric through groove (109d-2), a contraction spring (109d-5c) disposed between the extrusion block (109d-5b) and the concentric through groove (109d-2), and a support rod (109d-5d); The extrusion block (109d-5b) is connected to the guide protrusion (109d-4) via a support rod (109d-5d).

4. The fluid pipeline rapid installation detection device according to claim 3, characterized in that: The sealing member (201c-4) comprises a connecting protrusion (201c-4a) arranged on the outside of the connecting pipe (201c-3), and a connecting sliding groove (201c-4b) arranged on one side of the inlet pipe (103); The connecting protrusion (201c-4a) is slidably arranged in the connecting sliding groove (201c-4b).

5. The fluid pipeline rapid installation detection device according to claim 4, characterized in that: The arc-shaped mounting block (202b) comprises a clamping groove (202b-1) provided on the side of the arc-shaped mounting block (202b), and a clamping block (202b-2) arranged in the clamping groove (202b-1); The clamping block (202b-2) is in conflict with the guide groove (202d).

6. The fluid pipeline rapid installation detection device according to claim 5, characterized in that: The conducting component (203) comprises a top plate (203a) slidably disposed in the trigger tube (105), a compression spring (203b) disposed on one side of the top plate (203a), a through-hole plate (203c) connected to one end of the compression spring (203b), and a connecting column (203d) disposed between the compression spring (203b) and the through-hole plate (203c).

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