Ampoule bottle opener
Patent Information
- Application Number
- CN202522414700.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-14
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-11-14
AI Technical Summary
[0004]本申请实施例提供一种安瓿开瓶器,用于解决安瓿瓶在开启时容易出现玻璃碎片飞溅、割伤医护人员的问题
[0017]The beneficial effects of this application are as follows: This application provides a receiving hole at one end of the gripping body and a movable elastic clamping mechanism in an installation channel communicating with the receiving cavity on the outer wall of the gripping body. The cutting head is located inside the gripping body and fixed to the elastic clamping mechanism. When using this ampoule opener, medical personnel hold the gripping body with one hand and press the elastic clamping mechanism, causing it to move within the installation channel and move the cutting head from its initial position to a retraction position (i.e., the cutting head retracts into the installation channel). The other hand holds the ampoule body and inserts the head and neck of the ampoule into the receiving hole. Then, the elastic clamping mechanism is released, and under its own internal elastic force, it moves the cutting head from the retraction position back to the initial position until the two cutting heads clamp the neck of the ampoule. Then, rotate the ampoule opener and the ampoule relative to each other, causing the cutting head to make a circumferential cut around the neck of the ampoule. Finally, pry the ampoule opener left and right to separate the head of the ampoule from the body. This ampoule opener is not only easy to operate, but the cut on the ampoule is also relatively clean, reducing the risk of cuts and scratches to medical personnel. Furthermore, no glass shards will fly during the opening process, effectively reducing the risk of secondary injuries from glass fragments.
Smart Images

Figure CN224768459U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to an ampoule opener. Background Technology
[0002] Ampoules are small glass containers used to hold liquid medications, consisting of a body, neck, and cap. In the medical industry, ampoules are widely used due to their excellent sealing properties.
[0003] When opening ampoules, medical staff typically use blunt instruments such as tweezers to forcefully strike the head of the ampoule, causing it to shatter. After shattering, the broken ends of the ampoule contain sharp glass points that can easily cut medical staff, and the flying glass shards can also cause secondary injuries. Utility Model Content
[0004] This application provides an ampoule opener to solve the problem that glass shards can easily fly out and cut medical staff when opening ampoules.
[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions: This application provides an ampoule opener, including a gripping body, two elastic clamping mechanisms, and two cutting blades.
[0006] The gripping body has a first end and a second end distributed along a first direction. The first end of the gripping body has a receiving hole extending along the first direction on its end face. The gripping body has two mounting channels symmetrically arranged about the axis of the receiving hole. One end of each mounting channel is located on the outer wall of the gripping body, and the other end is located on the inner wall of the receiving hole. Two elastic clamping mechanisms are movably disposed in the two mounting channels. Two cutting blades are respectively disposed at the other ends of the two mounting channels and are fixedly connected to the two elastic clamping mechanisms. The cutting blades have an initial position and a clearance position relative to the gripping body. When the cutting blades are in the initial position, both cutting blades are located within the receiving hole; when the cutting blades are in the clearance position, both cutting blades are located within the two mounting channels.
[0007] When the elastic clamping mechanism moves, it drives the cutting head to move between the initial position and the avoidance position.
[0008] In one possible implementation, the elastic clamping mechanism includes a lever and an elastic element. A mounting channel extends along a first direction, the lever passes through the mounting channel and is rotatably connected to the gripping body; the two ends of the lever are an input end and an output end, respectively, the input end of the lever extending out of the outer wall of the gripping body, and the output end of the lever being fixedly connected to the cutting head. The elastic element abuts against the inner wall of the mounting channel, and the elastic element is used to cause the lever to drive the cutting head from a clearance position to an initial position.
[0009] In another possible implementation, the elastic element is located on the side of the lever's output end away from the receiving hole.
[0010] In another possible implementation, the position where the lever is rotatably connected to the gripping body is the fulcrum, the distance between the fulcrum and the input end of the lever is L1, and the distance between the fulcrum and the output end of the lever is L2, where L1 / L2 > 1.
[0011] In another possible implementation, the resilient clamping mechanism also includes a pressing plate located on the outside of the gripping body and fixedly connected to the input end of the lever.
[0012] In another possible implementation, the cutting head is arc-shaped along the radial direction of the receiving hole, away from the elastic clamping mechanism connected to it.
[0013] In another possible implementation, the receiving hole extends through the holding body along a first direction; the ampoule opener also includes a connecting tube, a waste collection box, and a negative pressure fan; the connecting tube is located at the second end of the holding body, one end of the connecting tube is connected to the receiving hole, the other end of the connecting tube is connected to the waste collection box, and the negative pressure fan is connected to the waste collection box.
[0014] In another possible implementation, the ampoule opener also includes a sensor switch located on the grip body or elastic clamping mechanism and electrically connected to a negative pressure fan. When the cutting head is in the initial position, the sensor switch is off, and the negative pressure fan stops; when the cutting head is in the clearance position, or any position between the initial and clearance positions, the sensor switch is on, and the negative pressure fan starts.
[0015] In another possible implementation, the ampoule opener also includes a filter screen, which is fixed to the connection between the waste collection box and the negative pressure fan.
[0016] In another possible implementation, the receiving hole includes a first segment and a second segment distributed along a first direction. The second segment is located between the first segment and a second end of the gripping body, and the cross-sectional area of the second segment gradually decreases in the direction from the first end of the gripping body to the second end of the gripping body.
[0017] The beneficial effects of this application are as follows: This application provides a receiving hole at one end of the gripping body and a movable elastic clamping mechanism in an installation channel communicating with the receiving cavity on the outer wall of the gripping body. The cutting head is located inside the gripping body and fixed to the elastic clamping mechanism. When using this ampoule opener, medical personnel hold the gripping body with one hand and press the elastic clamping mechanism, causing it to move within the installation channel and move the cutting head from its initial position to a retraction position (i.e., the cutting head retracts into the installation channel). The other hand holds the ampoule body and inserts the head and neck of the ampoule into the receiving hole. Then, the elastic clamping mechanism is released, and under its own internal elastic force, it moves the cutting head from the retraction position back to the initial position until the two cutting heads clamp the neck of the ampoule. Then, rotate the ampoule opener and the ampoule relative to each other, causing the cutting head to make a circumferential cut around the neck of the ampoule. Finally, pry the ampoule opener left and right to separate the head of the ampoule from the body. This ampoule opener is not only easy to operate, but the cut on the ampoule is also relatively clean, reducing the risk of cuts and scratches to medical personnel. Furthermore, no glass shards will fly during the opening process, effectively reducing the risk of secondary injuries from glass fragments. Attached Figure Description
[0018] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.
[0019] Figure 1 A schematic diagram of the overall structure of an ampoule opener provided in this application embodiment; Figure 2 for Figure 1 Exploded view of the structure of an ampoule opener; Figure 3 for Figure 1 A cross-sectional view of the internal structure of an ampoule opener; Figure 4 This is a schematic diagram showing the cutting head in its initial position. Figure 5 This is a schematic diagram showing the cutting head in the avoidance position. Figure 6 A diagram illustrating how the cutting blade clamps the ampoule. Figure 7 This is a schematic diagram of the cutting head structure; Figure 8 A partial structural cross-sectional view of another ampoule opener provided in an embodiment of this application; Figure 9 This is a cross-sectional view of the structure connecting the waste collection box to the negative pressure fan.
[0020] Figure label: 01. Ampoule opener; 10. Holding body; 10a. First end; 10b. Second end; 11. First shell; 12. Second shell; 20. Elastic clamping mechanism; 21. Lever; 21a. Input end; 21b. Output end; 22. Elastic element; 23. Rotating shaft; 24. Pressing plate; 30. Cutting head; 40. Connecting pipe; 50. Waste collection box; 60. Negative pressure fan; 61. Duct shell; 62. Bracket; 63. Fan; 64. Drive motor; 70. Filter screen; 80. Induction switch; 100. Accommodation hole; 101. First section; 102. Second section; 200. Installation channel; 02. Ampoule; 2a. Bottle body; 2b. Neck; 2c. Head. Detailed Implementation
[0021] To make the purpose, technical solution, and advantages of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0022] In the description of this application, it should be clarified that the terms "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "up," "down," and "horizontal," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are merely for the convenience of describing this application, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this application. Similarly, the term "quantity" should not be construed as a limitation of this application.
[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0024] This application provides an ampoule opener 01. Please refer to [link / reference]. Figures 1 to 5 As shown, Figure 1 This is a schematic diagram of the overall structure of an ampoule opener 01 provided in an embodiment of this application. Figure 2 for Figure 1 Exploded view of the structure of ampoule opener 01 in the image. Figure 3 for Figure 1A cross-sectional view of the internal structure of the ampoule opener 01 in the image. Figure 4 This is a schematic diagram showing the cutting head 30 in its initial position. Figure 5 This is a schematic diagram of the cutting head 30 in the avoidance position.
[0025] The aforementioned ampoule opener 01 includes a gripping body 10, two elastic clamping mechanisms 20, and two cutting blades 30.
[0026] For ease of description below, an XYZ coordinate system is established, and the length direction of the holding body 10 is defined as the Z-axis direction. It should be noted that the coordinate system of the holding body 10 can be flexibly set according to actual needs. This application only provides an example and should not be considered as a special limitation on this application.
[0027] The gripping body 10 has a first end 10a and a second end 10b distributed along a first direction (parallel to the Z-axis). The end face of the first end 10a of the gripping body 10 is provided with a receiving hole 100 extending along the first direction (parallel to the Z-axis). The gripping body 10 is provided with two mounting channels 200 symmetrically arranged about the axis of the receiving hole 100. One end of the mounting channel 200 is located on the outer wall of the gripping body 10, and the other end of the mounting channel 200 is located on the inner wall of the receiving hole 100.
[0028] Two elastic clamping mechanisms 20 are movably disposed in two mounting channels 200. A cutting head 30 is disposed within the holding body 10 and located at the other end of the mounting channel 200. The two cutting heads 30 are fixedly connected to the two elastic clamping mechanisms 20. The cutting heads 30 have an initial position and a clearance position relative to the holding body 10. When the cutting heads 30 are in the initial position, both cutting heads 30 are located within the receiving hole 100; when the cutting heads 30 are in the clearance position, both cutting heads 30 are located within the two mounting channels 200 respectively.
[0029] When the elastic clamping mechanism 20 moves, it drives the cutting head 30 to move between the initial position and the avoidance position. Specifically, when the cutting head 30 is in the initial position, the two cutting heads 30 can abut against each other or be spaced apart, ensuring that when the cutting head 30 is in a position between the initial position and the avoidance position, the two cutting heads 30 can clamp the ampoule 02. This application does not impose any special limitations on this aspect.
[0030] When using the ampoule opener 01, medical staff hold the grip body 10 with one hand and press the elastic clamping mechanism 20, causing the elastic clamping mechanism 20 to move in the installation channel 200 and drive the cutting head 30 from the initial position to the avoidance position (i.e., the cutting head 30 retracts into the installation channel 200). With the other hand, they hold the body 2a of the ampoule 02 and insert the head 2c and neck 2b of the ampoule 02 into the receiving hole 100.
[0031] Then the elastic clamping mechanism 20 is released. Under the action of its own internal elastic force, the elastic clamping mechanism 20 drives the cutting head 30 to move from the avoidance position to the initial position until the two cutting heads 30 clamp the neck 2b of the ampoule 02. Please refer to [link to relevant documentation]. Figure 6 As shown, Figure 6 This is a schematic diagram of the cutting head 30 clamping the ampoule 02. At this time, part of the cutting head 30 is located in the receiving hole 100 and the other part is located in the installation channel 200.
[0032] Then, the ampoule opener 01 and the ampoule 02 are rotated relative to each other around the Z-axis, causing the cutting head 30 to make a circumferential cut on the neck 2b of the ampoule 02. Finally, the ampoule opener 01 is pried left and right to separate the head 2c of the ampoule 02 from the body 2a. This ampoule opener is not only easy to operate, but the cut on the ampoule 02 is also relatively clean, reducing the risk of cuts and injuries to medical personnel. Furthermore, no glass shards are generated during the opening process, effectively reducing the risk of secondary injuries from glass fragments.
[0033] Please return to the previous page. Figure 2 As shown, in order to facilitate the assembly of the elastic clamping mechanism 20 onto the gripping body 10, the gripping body 10 can be designed to consist of a first shell 11 and a second shell 12 with symmetrical structure. After the first shell 11 and the second shell 12 are fastened together, the first shell 11 and the second shell 12 form the aforementioned receiving hole 100 and mounting channel 200.
[0034] Please continue reading Figure 3 As shown, the elastic clamping mechanism 20 includes a lever 21 and an elastic element 22. The mounting channel 200 extends along a first direction (parallel to the Z-axis), the lever 21 passes through the mounting channel 200, and is rotatably connected to the gripping body 10.
[0035] The lever 21 has an input end 21a and an output end 21b at its two ends. The input end 21a of the lever 21 extends out of the outer wall of the gripping body 10, and the output end 21b of the lever 21 is fixedly connected to the cutting head 30. The elastic element 22 abuts against the inner wall of the mounting channel 200 and is used to drive the lever 21 to move the cutting head 30 from the avoidance position to the initial position.
[0036] For example, the elastic element 22 can be a helical spring, a V-shaped spring sheet, elastic silicone, etc.
[0037] It is understandable that it is possible to... Figure 3 A rotating shaft 23 is fixed on the lever 21, and a shaft hole (not shown in the figure) is provided on the inner wall of the mounting channel 200 to mate with the rotating shaft 23. During assembly, the rotating shaft 23 is inserted into the shaft hole to achieve a rotatable connection between the lever 21 and the gripping body 10. Alternatively, the rotating shaft 23 can be fixed on the inner wall of the mounting channel 200, and a shaft hole for matementing the rotating shaft 23 can be provided on the lever 21, which also achieves a rotatable connection between the lever 21 and the gripping body 10. This application does not impose any special limitations on this method.
[0038] In some embodiments, please refer back to the previous section. Figure 3 As shown, the elastic element 22 is located on the side of the output end 21b of the lever 21 away from the receiving hole 100. This makes it easier to assemble and fix the elastic element 22. Furthermore, by utilizing the amplification principle of the lever 21, the force applied by medical personnel at the input end 21a of the lever 21 can be less than the elastic force of the elastic element 22.
[0039] Further reading is available upon request. Figure 2 As shown, the position where lever 21 is rotatably connected to gripping body 10 is the fulcrum (i.e., the axis of rotating shaft 23). The distance between the fulcrum and the input end 21a of lever 21 is L1, and the distance between the fulcrum and the output end 21b of lever 21 is L2, where L1 / L2 > 1.
[0040] In other words, the lever arm of the input end 21a of the lever 21 is greater than the lever arm of the output end 21b. The process of medical staff pressing the input end 21a of the lever 21 is actually the process of overcoming the elastic force of the elastic element 22. The force of the cutting head 30 clamping the neck 2b of the ampoule 02 also comes from the elastic force of the elastic element 22. Therefore, the above-mentioned structure design allows medical staff to open the cutting head 30 (i.e., move it from the initial position to the avoidance position) with only a small force, making it convenient for the ampoule 02 to be inserted into the holding body 10.
[0041] Furthermore, the elastic clamping mechanism 20 also includes a pressing plate 24, which is located on the outside of the gripping body 10 and is fixedly connected to the input end 21a of the lever 21. In this way, the pressing plate 24 has a larger contact area, making it easier for medical personnel to press, thereby improving the operating comfort of the ampoule opener 01.
[0042] Please see Figure 7 As shown, Figure 7This is a schematic diagram of the cutting head 30. Along the radial direction of the receiving hole 100 (i.e., the direction passing through the axis of the receiving hole 100 and perpendicular to the Z-axis), the edge of the cutting head 30 away from the lever 21 connected to it is arc-shaped.
[0043] This increases the contact area between the cutting head 30 and the neck 2b of the ampoule 02, thereby improving cutting efficiency. Furthermore, it reduces the pressure exerted by the cutting head 30 on the neck 2b of the ampoule 02, preventing the ampoule 02 from being crushed by the cutting head 30.
[0044] The cutting head 30 can be made of hard alloy steel, or it can have an aluminum alloy base with diamonds embedded in the base.
[0045] During the cutting process of glass products, some small glass fragments will inevitably be generated. These small glass fragments may fall into the liquid in ampoule 02, causing contamination of the liquid.
[0046] For the reasons mentioned above, please refer to Figure 8 As shown, Figure 8 This is a partial structural cross-sectional view of another ampoule opener 01 provided in an embodiment of this application. The receiving hole 100 extends through the gripping body 10 along a first direction (parallel to the Z-axis).
[0047] The ampoule opener 01 also includes a connecting tube 40, a waste collection box 50, and a negative pressure fan 60. The connecting tube 40 is located at the second end 10b of the holding body 10. One end of the connecting tube 40 is connected to the receiving hole 100, and the other end of the connecting tube 40 is connected to the waste collection box 50. The negative pressure fan 60 is connected to the waste collection box 50.
[0048] In this way, when cutting the ampoule 02, the negative pressure fan 60 can be turned on, and the negative pressure generated by the negative pressure fan 60 can be used to suck the glass fragments into the waste collection box 50 through the connecting pipe 40 to ensure that the medicine is not contaminated.
[0049] It is understood that the negative pressure fan 60 can be powered by a lithium-ion rechargeable battery or by an external power cord, and this application does not make any special restrictions on this.
[0050] To enable automatic activation of the negative pressure fan 60, the ampoule opener 01 also includes a sensor switch 80. The sensor switch 80 is located on the lever 21 of the gripping body 10 or the elastic clamping mechanism 20 and is electrically connected to the negative pressure fan 60. When the cutting head 30 is in the initial position, the sensor switch 80 is in the off state, and the negative pressure fan 60 stops. When the cutting head 30 is in any position other than the initial position (including the avoidance position, or any position between the initial position and the avoidance position), the sensor switch 80 is in the on state, and the negative pressure fan 60 starts.
[0051] In this way, when medical staff press the elastic clamping mechanism 20, the negative pressure fan 60 will turn on simultaneously and remain on while the cutting head 30 clamps and cuts the ampoule 02, ensuring that glass shards are sucked into the waste collection box 50. When the cutting is completed and the cutting head 30 returns to its initial position, the negative pressure fan 60 will turn off, saving power consumption.
[0052] Please see Figure 9 As shown, Figure 9 This is a cross-sectional view of the structure connecting the waste collection box 50 and the negative pressure fan 60. The negative pressure fan 60 includes a duct shell 61, a bracket 62, a fan 63, and a drive motor 64. The duct shell 61 is cylindrical, and the bracket 62 is fixed to the inner wall of the duct shell 61. The drive motor 64 is fixed to the bracket 62 and located at the center of the duct shell 61. The fan 63 is fixedly connected to the output shaft of the drive motor 64.
[0053] To prevent glass shards from escaping from the waste collection container, please continue reading. Figure 9 As shown, the ampoule opener 01 also includes a filter 70, which is fixed at the connection between the waste collection box 50 and the negative pressure fan 60. In this way, the filter 70 can trap glass fragments in the waste collection box 50.
[0054] The waste collection box 50 can be detachably connected to the connecting pipe 40 and the negative pressure fan 60, which makes it easy to disassemble and empty the glass shards in the waste collection box 50.
[0055] Further, please refer back to [link / reference]. Figure 8 As shown, the receiving hole 100 includes a first segment 101 and a second segment 102 distributed along a first direction (parallel to the Z-axis). The second segment 102 is located between the first segment 101 and the second end 10b of the gripping body 10, and the cross-sectional area of the second segment 102 gradually decreases in the direction from the first end 10a of the gripping body 10 to the second end 10b of the gripping body 10.
[0056] In this way, by gradually reducing the cross-sectional area of the second section 102 of the receiving hole 100, the wind pressure can be enhanced, which is equivalent to increasing the suction of the negative pressure fan 60, thereby sucking as much glass shards as possible into the waste collection box 50.
[0057] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.
[0058] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. An ampoule opener, characterized in that, include: The gripping body has a first end and a second end distributed along a first direction. The end face of the first end of the gripping body is provided with a receiving hole extending along the first direction. The gripping body is provided with two mounting channels symmetrically arranged about the axis of the receiving hole. One end of the mounting channel is located on the outer wall of the gripping body, and the other end of the mounting channel is located on the inner wall of the receiving hole. Two elastic clamping mechanisms are respectively movably disposed in the two mounting channels; Two cutting heads are respectively disposed at the other end of the two mounting channels and respectively fixedly connected to the two elastic clamping mechanisms; the cutting heads have an initial position and an avoidance position relative to the holding body, and when the cutting heads are in the initial position, both cutting heads are located in the receiving hole; When the cutting head is in the avoidance position, the two cutting heads are respectively located in the two mounting channels; When the elastic clamping mechanism moves, it drives the cutting head to move between the initial position and the avoidance position.
2. The ampoule opener according to claim 1, characterized in that, The elastic clamping mechanism includes a lever and an elastic element; The mounting channel extends along the first direction, the lever passes through the mounting channel and is rotatably connected to the gripping body; the two ends of the lever are an input end and an output end, the input end extends out of the outer side wall of the gripping body, and the output end is fixedly connected to the cutting head; The elastic element abuts against the inner wall of the lever and the mounting channel, and the elastic element is used to cause the lever to drive the cutting head to move from the avoidance position to the initial position.
3. The ampoule opener according to claim 2, characterized in that, The elastic element is located on the side of the output end opposite to the receiving hole.
4. The ampoule opener according to claim 2, characterized in that, The position where the lever is rotatably connected to the gripping body is the fulcrum. The distance between the fulcrum and the input end is L1, and the distance between the fulcrum and the output end is L2, wherein L1 / L2 > 1.
5. The ampoule opener according to claim 2, characterized in that, The elastic clamping mechanism also includes a pressing plate, which is located on the outside of the gripping body and is fixedly connected to the input end.
6. The ampoule opener according to claim 1, characterized in that, Along the radial direction of the receiving hole, the edge of the cutting head away from the elastic clamping mechanism connected to it is arc-shaped.
7. The ampoule opener according to any one of claims 1 to 6, characterized in that, The receiving hole extends through the gripping body along the first direction; The ampoule opener also includes a connecting tube, a waste collection box, and a negative pressure fan; the connecting tube is located at the second end of the grip body, one end of the connecting tube is connected to the receiving hole, the other end of the connecting tube is connected to the waste collection box, and the negative pressure fan is connected to the waste collection box.
8. The ampoule opener according to claim 7, characterized in that, The ampoule opener also includes a sensor switch, which is located on the gripping body or the elastic clamping mechanism and is electrically connected to the negative pressure fan. When the cutting head is in the initial position, the sensor switch is in the off state, and the negative pressure fan stops. When the cutting head is in the avoidance position, or any position between the initial position and the avoidance position, the inductive switch is in the conducting state, and the negative pressure fan is turned on.
9. The ampoule opener according to claim 7, characterized in that, The ampoule opener also includes a filter screen, which is fixed at the connection between the waste collection box and the negative pressure fan.
10. The ampoule opener according to claim 7, characterized in that, The accommodating hole includes a first segment and a second segment distributed along the first direction; The second segment is located between the first segment and the second end of the gripping body, and the cross-sectional area of the second segment gradually decreases in the direction from the first end of the gripping body to the second end of the gripping body.