Toy Long Gun

Abstract

To provide a toy long gun having higher durability, reduced manufacturing costs, and improved ease of assembly and practicality. [Solution] The toy long gun of this invention is a cartridge-ejecting toy long gun and includes a barrel, a gas control unit (12), a firing unit, a gas supply unit, and a magazine. The gas control unit (12) includes a lower control module (34) and an upper control module (36). The upper control module (36) houses a gas valve unit (38) that controls whether high-pressure gas output from the gas supply unit flows into the bolt mechanism. The gas valve unit (38) includes a gas valve rod (42), an exhaust member (44), a sleeve ring (46) attached to the outside of the gas valve rod (42), a sleeve (48), and a spring.

Description

[Technical Field]

[0001] The present invention relates to a toy gun, and more particularly to a toy long gun having a cartridge ejection mechanism. [Background technology]

[0002] Various toy guns that mimic the structure of real guns, such as pistols, rifles, and shotguns, have been known for some time. Among these toy guns, long-gun toy guns, in particular, do not fire actual bullets but are configured to simulate the firing of a real gun by using a mechanical or pneumatic drive device to produce sound, light, or other effects when fired. For example, some commercially available long-gun toy guns have a mechanism for ejecting a projectile simulating a cartridge case from an ejection port on the side of the gun barrel, thereby replicating the cartridge case ejection action of a real gun and providing users with a greater sense of realism and enjoyment.

[0003] The cartridge ejection drive system for toy long guns is mainly divided into pneumatic and electric systems, with pneumatic systems being the most common. In pneumatic systems, the gun mechanism is driven by high-pressure air supplied from a gas cylinder, which ejects the projectile at high speed. The gas cylinder is removably attached to the handle, and a valve assembly is installed inside the gun barrel to control the flow of high-pressure air.

[0004] The valve assembly in this prior art consists of a valve body, a sealing ring and collar, an air outlet, a spring, a fixing ring, and an O-ring. The valve body is rod-shaped and has an air inlet hole on its underside, which communicates with the outlet through an internal air passage. During use, a firing pin (hammer) strikes one end of the valve body, moving the valve body toward the air outlet, allowing high-pressure air to flow in from the gas cylinder, pass through the air passage and the outlet, and be supplied to the gun mechanism, activating it.

[0005] However, because O-rings are made of elastic materials (such as silicone rubber) and are small in size, they are prone to deformation or breakage due to elastic fatigue when subjected to repeated blows, which can result in leakage of high-pressure gas, causing malfunctions of the gun mechanism and unstable ejection of shells.

[0006] Furthermore, in conventional toy long guns, the gas cylinder is connected via a connection assembly in the gun handle, which has many components, making the manufacturing cost high and the assembly process complicated. Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a toy long gun with greater durability by preventing the leakage of high-pressure air caused by deterioration of the valve assembly leak-proof ring, which is seen in conventional cartridge-discharging toy long guns.

[0008] Another object of the present invention is to simplify the connection structure for connecting gas cylinders, reduce the number of parts compared to conventional gas cylinder connection assemblies, reduce manufacturing costs, and improve ease of assembly and practicality. [Means for solving the problem]

[0009] In order to solve the above problems, the present invention has the following configuration. That is, the toy long gun of the present invention is a cartridge ejection type toy long gun, and comprises a barrel, a gas control unit, a firing unit, a gas supply unit, and a magazine. The gun barrel is composed of a lower barrel and an upper barrel that can be assembled and disassembled, with a magazine seat and a grip formed in the lower barrel, and a cartridge ejection port on the side of the upper barrel and a bolt mechanism inside. The gas control unit and firing unit are located inside the lower barrel, and a gas supply unit is located in the grip, with high-pressure air supplied from the gas supply unit to the gas control unit. The magazine is removably attached to the magazine seat of the lower barrel. The gas control unit includes a lower control module and an upper control module, and the high-pressure air output from the gas supply unit is guided to the bolt mechanism via the lower control module and the upper control module, causing the bolt mechanism to move under the pressure of the high-pressure air. The projectile loaded in the lower barrel is ejected from the cartridge ejection port by the movement of the bolt mechanism. The supply gas unit is connected to the lower control module, and the firing unit is connected to one end of the upper control module. The upper control module is provided with an air valve unit, one end of which corresponds to the firing pin of the firing unit, and the air valve unit controls whether high-pressure air flows from the lower control module to the bolt mechanism.

[0010] The feature of the present invention is that the valve unit has the following configuration. That is, the valve unit includes a valve rod, an exhaust member, a sleeve ring disposed on the outside of the valve rod, a sleeve, and a spring. The air valve rod is rod-shaped and has an air passage formed therein, extending from one end of the air valve rod to an intake port on its side. One end of the air valve rod corresponds to the firing pin of the percussion unit, and the air valve rod moves when struck by the firing pin. The exhaust member is fixed inside the upper control module and has a hollow cylindrical shape. It functions to exhaust high-pressure air through the air passage of the air valve rod. A first connecting pipe is formed at one end of the exhaust member. The sleeve ring and the sleeve are respectively attached to both ends of the valve rod, and the sleeve ring is fixed inside the upper control module and positioned to cover the intake port. When the valve rod is moved by the firing pin, the intake port is exposed and opens at a position corresponding to the gas transport pipe of the lower control module. The sleeve is hollow and has a fixed portion and a second connecting pipe formed at both ends. One end of the spring is attached to the fixed portion, and the other end abuts against a contact ring provided on the outer periphery of the air valve rod. The second connecting pipe is connected to the first connecting pipe and covers the air passage of the air valve rod, preventing leakage of high-pressure air. [Effects of the Invention]

[0011] The improved valve assembly of this invention eliminates the need for traditional O-ring sealing, providing a more stable seal between the valve rod and sleeve, effectively preventing high-pressure air leakage even after extended use and significantly improving the operational stability of the gun mechanism.

[0012] In addition, the sleeve ring and sleeve can be designed as an integrated or separate structure, which simplifies manufacturing and assembly, reduces the number of parts, and reduces manufacturing costs.Furthermore, the air valve rod intake port and air passage have an integrated structure, which reduces airflow loss and improves airflow efficiency.

[0013] In addition, the use of a spring-loaded return mechanism ensures that the valve rod returns to its original position after firing, ensuring stable operation even with repeated shooting. This allows the cartridge ejection and gun mechanism to have a realistic feel similar to that of a real gun, enhancing the entertainment value of the toy gun.

[0014] Furthermore, the gas cylinder connection structure of this invention does away with the conventional complicated connection assembly and adopts a simple connection configuration, reducing the number of parts and facilitating installation work, improving assembly and maintenance, and simplifying replacement work by users.

[0015] As described above, the toy long gun of the present invention surpasses the prior art in all aspects of durability, sealing, stability, operability and manufacturing efficiency, realizing a practical and high-performance toy gun. [Brief explanation of the drawings]

[0016] For a clearer understanding of the present invention, reference is now made to the drawings. [Figure 1] 1 is a schematic diagram of a valve unit in a conventional cartridge ejection toy long gun. [Figure 2] 1 is a schematic diagram of gas flow in a conventional cartridge ejection toy long gun. [Figure 3] 1 is a schematic diagram showing the connection state between a gas cylinder connecting member and a gas cylinder in a conventional cartridge ejection type toy long gun. [Figure 4] 1 is a diagram showing a part of the exterior of a preferred embodiment of the present invention; [Figure 5] 1 is a schematic diagram of a valve unit according to a preferred embodiment of the present invention; [Figure 6] FIG. 10 is a schematic view of a valve unit according to another preferred embodiment of the present invention; [Figure 7] 1 is a cross-sectional view of a gas cylinder connecting member according to a preferred embodiment of the present invention; [Figure 8] 1 is a bottom view of a gas cylinder connector according to a preferred embodiment of the present invention; [Figure 9] 1 is a schematic view showing the connection between a gas cylinder connector and a gas cylinder according to a preferred embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, in which reference numerals are used for the sake of convenience and are not intended to limit the scope of the present invention.

[0018] 4 to 9, a toy long gun 10 according to a preferred embodiment of the present invention comprises a barrel 11, a gas control unit 12, a firing unit 13, a gas supply unit 14, and a magazine 15. The barrel 11 includes a detachable lower barrel 22 and an upper barrel 24, and the lower barrel 22 is provided with a magazine seat 26 and a grip 28. A cartridge ejection port 30 and a bolt mechanism 32 are provided on one side and inside of the upper barrel 24, respectively.

[0019] The gas control unit 12 and the firing unit 13 are disposed within the lower barrel 22, and the gas supply unit 14 is disposed within the grip 28. The gas supply unit 14 outputs high-pressure gas to the gas control unit 12. The magazine 15 is removably inserted into the magazine mounting seat 26. The gas control unit 12 includes a lower control module 34 and an upper control module 36. High-pressure gas from the gas supply unit 14 is guided to the bolt mechanism 32 via a gas transport line 35 of the lower control module 34 and the upper control module 36, and the bolt mechanism 32 moves due to the action of the high-pressure gas. The bullet (dummy bullet) supplied from the magazine 15 to the lower barrel 22 is ejected from the cartridge ejection port 30 by the movement of the bolt mechanism 32.

[0020] The gas supply unit 14 is connected to the lower control module 34, and the percussion unit 13 is connected to one end of the upper control module 36. The upper control module 36 defines a housing space 37 with openings at both ends, within which is disposed a valve unit (valve assembly) 38 of the present invention. One end of the valve unit 38 corresponds to the firing pin 40 of the percussion unit 13. The valve unit 38 controls whether or not high-pressure gas from the lower control module 34 flows to the bolt mechanism 32. The detailed configuration of the valve unit 38 will be described below.

[0021] The air valve unit 38 includes a valve rod 42, an exhaust member 44, a sleeve ring 46, a sleeve 48, and a spring 50. The air valve rod 42 is rod-shaped and movably mounted within the upper control module 36. It has a rod body 52 and an abutment ring 54. The rod body 52 includes a first portion 56 and a second portion 58, with the outer diameter of the second portion 58 being larger than that of the first portion 56. An intake port 60 is provided at the end of the first portion 56 that is adjacent to the second portion 58, and an air passage 62 extends from the intake port 60 to the other end of the second portion 58. The end of the first portion 56 corresponds to the firing pin 40, and when the firing pin 40 strikes the end of the first portion 56 during firing, the air valve rod 42 moves.

[0022] The abutment ring 54 is provided in a ring shape protruding from the second portion 58 near the suction port 60, and an airtight ring (seal ring) 64 can be installed between the abutment ring 54 and the suction port 60. This improves the sealing performance at the abutment portion between the abutment ring 54 and the sleeve ring 46.

[0023] The exhaust member 44 is formed in a hollow cylindrical shape and is fixed within the upper control module 36. Its function is to output high-pressure gas guided through the air passage 62 of the air valve rod 42. The exhaust member 44 has a tubular body 66, and a first connecting pipe 68 and an insertion portion 70 are formed on both ends of the tubular body 66. The inner diameter of the tubular body 66 is set larger than the outer diameter of the second portion 58 of the air valve rod 42. The first connecting pipe 68 corresponds to the second portion 58, and has a threaded portion 71 formed on its outside and a first end surface 72 at its inner end. Furthermore, an airtight ring 74 is attached to the outside of the first connecting pipe 68 and abuts against the inner wall of the accommodation space 37 of the upper control module 36.

[0024] The sleeve ring 46 is an annular member that is fixed within the accommodation space 37 and covers the outer periphery of the second portion 58 of the air valve rod 42, blocking the intake port 60. When the air valve rod 42 is moved by the firing pin 40, the intake port 60 is exposed from the shielding of the sleeve ring 46, and the exposed intake port 60 opens at a position corresponding to the gas transport pipeline 35 of the lower control module 34. An airtight ring 76 is also disposed on the outside of the sleeve ring 46 and abuts against the inner wall of the accommodation space 37, ensuring airtightness on the outer periphery.

[0025] The sleeve 48 is hollow and tubular, and is positioned to fit onto the end of the first connecting pipe 68 corresponding to the second portion 58 of the air valve rod 42. The sleeve 48 has a fixed portion 78 and a second connecting pipe 80. The inner diameter of the fixed portion 78 is smaller than the inner diameter of the second connecting pipe 80. The fixed portion 78 is loosely fitted (lively fitted) onto the outer periphery of the end of the second portion 58. The second connecting pipe 80 has a threaded portion 82 on its inner side, and a second end face 84 at its inner end. The second end face 84 is positioned parallel to the first end face 72, and the threaded portion 82 can be threadedly engaged with the threaded portion 71 of the first connecting pipe 68 of the exhaust member 44. By threading and fixing the threaded portion 82 of the second connecting pipe 80 of the sleeve 48 onto the threaded portion 71 of the first connecting pipe 68 of the exhaust member 44, the air passage 62 of the air valve rod 42 is covered, preventing leakage of pressurized air.

[0026] Furthermore, in order to improve the airtightness of the connection between the exhaust member 44 and the sleeve 48, a seal ring 86 can be inserted between the first connecting pipe 68 and the second connecting pipe 80 (see FIG. 5). The seal ring 86 can be configured to be held between the first end face 72 and the second end face 84, and its inner diameter is set to be larger than the outer diameter of the second portion 58 of the valve rod 42. Note that the seal ring 86 is not an essential component and can be omitted depending on the embodiment.

[0027] One end of the spring 50 is engaged with the fixed portion 78 of the sleeve 48, and the other end abuts against an abutment ring 54 provided on the outer periphery of the valve rod 42. With this configuration, the elastic tension of the spring 50 presses the abutment ring 54 against one end of the sleeve ring 46, and after the valve rod 42 is struck and moved by the firing pin 40, the spring 50 allows the valve rod 42 to elastically return to its original position.

[0028] An air guide block 88 is also provided inside the upper control module 36. The air guide block 88 is made of an elastic material (e.g., rubber) and is inserted into one opening of the accommodation space 37 (the first part 56 of the air valve rod 42 is located on the other opening of the accommodation space 37). An L-shaped exhaust passage 90 is formed inside the air guide block 88, and the insertion part 70 of the exhaust member 44 is inserted into the bottom end of the exhaust passage 90. The top end of the exhaust passage 90 is connected to the bolt mechanism 32.

[0029] Next, the configuration of the gas supply unit 14 will be described. The gas supply unit 14 includes a gas cylinder connection member 92, a gas cylinder 94, and an elastic member 95. The gas cylinder connection member 92 is installed within the grip 28 and has a structure for outputting high-pressure gas to the lower control module 34 after the gas cylinder 94 is inserted into the grip. The gas cylinder connection member 92 includes a threaded rod 96, a puncture nozzle 98, and a connecting part 100. The threaded rod 96 is detachably threaded into the grip 28, and the puncture nozzle 98 is provided at one end of the threaded rod 96 and has a pointed tip, which functions to puncture the inserted gas cylinder 94. The connecting part 100 includes a half body 102 and a recess 104, and the half body 102 is provided at the end of the threaded rod 96 opposite the puncture nozzle 98. A recess 106 is formed on the half 102, and this recess 106 extends into the threaded rod 96, and a recessed groove 104 is formed extending outward from the recess 106. The recessed groove 104 functions as an operating part when a hand tool (e.g., a flat-head screwdriver) comes into contact with the recessed groove 104 to rotate the gas cylinder connecting member 92 and lock it into the grip 28. The puncturing nozzle 98 is disposed inside the recess 106, and a vent hole 108 is formed that passes through the tip of the puncturing nozzle 98 and leads to the threaded rod 96. The gas cylinder 94 is preferably a carbon dioxide (CO2) cylinder.

[0030] As described above, when the user pulls the trigger of the firing unit 13, the firing pin 40 strikes the end of the first portion 56 of the valve rod 42, momentarily pushing the valve rod 42 (toward the muzzle), exposing the intake port 60 and releasing the high-pressure gas. The released high-pressure gas travels from the gas transport line 35 of the lower control module 34 through the air passage 62, the inner lumens of the first connecting pipe 68 and the second connecting pipe 80, and the exhaust passage 90 of the air guide block 88 to the bolt mechanism 32, moving the bolt mechanism 32 and completing the ejection operation.

[0031] At the moment the air valve rod 42 is struck by the firing pin 40, the spring 50 is compressed by the reaction force acting on the fixed exhaust member 44, sleeve 48, and air guide block 88. After the firing pin 40 returns to its original position, the elastic tension of the spring 50 causes the air valve rod 42 to return to its original position, again closing the intake port 60 and stopping the supply of high-pressure gas. This action ensures reliable opening and closing even with repeated firings.

[0032] In the prior art, a fixed ring block attached to one end of the valve body fixed one end of the spring, and an O-ring (seal ring) was placed between the fixed ring block and the insertion tube to absorb the impact generated when the firing pin struck and prevent air leakage. However, because the O-ring is a small elastic body, repeated impacts from the end of the fixed ring block caused it to deform and break in a short period of time due to elastic fatigue, resulting in the problem of high-pressure gas leaking.

[0033] In contrast, in the present invention, the striking force from the firing pin 40 is transmitted to the air guide block 88 via the spring 50, the exhaust member 44, and the first and second connecting pipes 68, 80 of the sleeve 48. The air guide block 88 is made of an elastic material, has a larger volume than a conventional O-ring, and is not annular (its volume is several times that of an O-ring), so it is easy to absorb the striking force and is less likely to deform over time. Furthermore, the exhaust member 44 and sleeve 48 form a connected structure, which differs from the conventional structure in which the exhaust member and fixed ring block are separate, and therefore effectively prevents leakage of high-pressure gas and improves durability.

[0034] Furthermore, the gas cylinder connection member 92 is designed as an integrated member, and combines the function of locking into the grip 28 and the function of piercing the gas cylinder 94. Unlike conventional devices, it does not require multiple parts such as a case-shaped lock, a tubular piercing valve, and a seal ring, which not only simplifies the structure and reduces manufacturing costs, but also eliminates the need to provide a separate seal ring, improving economy and practicality.

[0035] As described above, the present invention solves the problem of high-pressure gas leakage caused by deterioration of the O-rings that existed in conventional cartridge-ejecting toy long guns through the novel and effective structure of the air valve unit and gas supply unit, and provides a toy long gun that is excellent in durability, sealing, and operability.

[0036] The above is merely one example of a preferred embodiment of the present invention, and various modifications are permitted within the scope of the present invention. For example, the specific shapes of the exhaust member 44 and sleeve 48, the position and dimensions of the threaded portions 71 and 82, the presence or absence of the seal ring 86, the material and shape of the air guide block 88, and the detailed structure of the gas cylinder connecting member 92 can be changed depending on the embodiment. All of these are within the technical scope of the present invention. [Explanation of symbols]

[0037] 10 toy long gun 11 barrel 12 Gas Control Unit 13 Firing Unit 14 Supply gas unit 15 magazines 22 Lower barrel 24 Upper barrel 26 Magazine mounting seat 28 Grip 30 Cartridge outlet 32 bolt mechanism 34 Lower Control Module 35 Gas transport pipeline 36 Upper Control Module 37 Containment Space 38 Valve unit 40 firing pin 42 Valve rod 44 Exhaust parts 46 Sleeve Ring 48 sleeve 50 springs 52 Rod 54 Contact ring 56 Part 1 58 Part 2 60 Intake port 62 Air passage 64 Airtight Ring 66 Body 68 First connecting pipe 70 Insertion section 71 Threaded part 72 First end face 74 Airtight Ring 76 Airtight Ring 78 Fixed part 80 Second connecting pipe 82 Threaded part 84 Second end face 86 Seal ring 88 Air Conduction Block 90 Exhaust passage 92 Gas cylinder connection parts 94 Gas Cylinder 96 Threaded Rod 98 Puncture Nozzle 100 Connection part 102 one piece 104 Concave tank 106 Recess 108 Ventilation hole

Claims

1. A cartridge ejection toy long gun comprising a barrel, a gas control unit, a firing unit, a gas supply unit, and a magazine, The gun barrel includes a lower barrel and an upper barrel that can be disassembled and assembled, the lower barrel having a magazine seat and a grip, a cartridge ejection port and a bolt mechanism provided on one side and inside of the upper barrel, respectively, the gas control unit and the firing unit are provided in the lower barrel, the gas supply unit is provided in the grip, high-pressure gas from the gas supply unit is supplied to the gas control unit, and the magazine is detachably attached to the magazine seat, the gas control unit includes a lower control module and an upper control module, high-pressure gas from the gas supply unit is sent to the bolt mechanism via the lower control module and the upper control module, the bolt mechanism is moved by the action of the high-pressure gas, and the projectile fed from the magazine into the lower barrel is discharged from the cartridge case discharge port by the movement of the bolt mechanism; the supply gas unit is connected to the lower control module, the firing unit is connected to one end of the upper control module, and a valve unit is provided inside the upper control module, one end of the valve unit corresponds to the firing pin of the firing unit, and the valve unit controls whether high-pressure gas flows from the lower control module to the bolt mechanism; the air valve unit includes a valve rod, an exhaust member, a sleeve ring provided on the outside of the valve rod, a sleeve, and a spring; the air valve rod is rod-shaped and has an air passage extending from one end to an intake port provided on a side thereof; one end of the air valve rod corresponds to the firing pin and moves the air valve rod when struck by the firing pin; the exhaust member is a hollow cylindrical member fixed inside the upper control module and has a first connecting pipe at one end for discharging the high-pressure gas transported through the air passage of the air valve rod; the sleeve ring and the sleeve are provided on both ends of the air valve rod, the sleeve ring is fixed in the upper control module to block the intake port, and when the air valve rod moves to expose the intake port, the intake port opens corresponding to the gas transport pipeline of the lower control module, the sleeve is hollow and has a fixing portion and a second connecting pipe at both ends, one end of the spring contacts the fixing portion and the other end contacts an abutment ring on the outer side of the air valve rod, and the second connecting pipe is connected corresponding to the first connecting pipe, blocking the air passage of the air valve rod to prevent leakage of high-pressure gas.

2. the valve rod having a first portion and a second portion; the second portion has an outer diameter larger than that of the first portion, one end of the portion corresponds to the firing pin, the abutment ring and the suction port are provided at an end of the second portion closer to the first portion, the suction port is located closer to the first portion than the abutment ring, the air passage extends from the suction port to the other end of the second portion, the sleeve ring is provided outside the second portion, and the abutment ring abuts against an end face of the sleeve ring due to the tension of the spring, the exhaust member has a cylindrical tubular body and is provided with the first connecting pipe at one end and an insertion portion at the other end, the inner diameter of the tubular body is larger than the outer diameter of the second portion of the air valve rod, the fixing portion of the sleeve is annular, the inner diameter of the sleeve is larger than the outer diameter of the second portion, and the inner diameter of the second connecting pipe is larger than the inner diameter of the fixing portion, 2. The toy long gun of claim 1, wherein a seal ring is provided inside the first connecting pipe and the second connecting pipe, the inner diameter of the seal ring being larger than the outer diameter of the second portion, the inner end of the first connecting pipe having a first end face, the inner end of the second connecting pipe having a second end face, the seal ring being sandwiched between the first end face and the second end face, threaded portions being formed on the inside of the first connecting pipe and the outside of the second connecting pipe so as to be threadably connected to each other, and an airtight ring is provided between the abutment ring and the suction port, and the airtight ring abuts against the end face of the sleeve ring.

3. an air guide block made of an elastic material is provided at one end of the upper control module, and has an L-shaped exhaust passage therein; an insertion part is provided at one end of the exhaust member, and the insertion part is inserted into one end of the exhaust passage, and the other end communicates with the bolt mechanism; 2. The toy long gun according to claim 1, wherein the upper control module has an interior formed with a receiving space having openings at both ends, the air valve unit is disposed within the receiving space, the air guide block is disposed at one open end of the receiving space, and the end of the air valve rod corresponding to the firing pin is located at the other open end.

4. 2. The toy long gun according to claim 1, wherein the inside of the first connecting pipe and the outside of the second connecting pipe are formed with threaded portions that can be threadedly engaged with each other, and the first connecting pipe and the second connecting pipe are threadedly connected.

5. the supply gas unit includes a gas cylinder connecting member and an elastic member; the gas cylinder connecting member is provided inside the grip and supplies high-pressure gas from the gas cylinder to the gas control unit, the gas cylinder connecting member includes a threaded rod and a puncture nozzle, the threaded rod is detachably screwed into the grip, the puncture nozzle is provided at one end of the threaded rod and has a conical shape, an air hole is formed from the puncture nozzle through the threaded rod, and the elastic member is interposed between the gas cylinder connecting member and the gas cylinder, The toy long gun described in claim 1, characterized in that the gas cylinder connecting member further has a connecting portion at one end of the threaded rod near the puncture nozzle, a recess formed in the connecting portion, the puncture nozzle being provided within the recess, and the connecting portion can be grasped with a tool and screwed into the inside of the grip.

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