Press-to-switch gas cylinder puncture device

Abstract

A press-and-switch gas cylinder puncture device includes a base, a needle, a limiting end cap, a toothed switching element, a first return spring, a drive sleeve, a second return spring, and a pressing element. The base has a connecting end and an operating end, with a connecting end and an operating end having a connecting hole and a venting structure connected to at least one side of the connecting hole. The needle passes through the connecting hole. The limiting end cap is connected to the operating end and has an inner wall ratchet structure. The toothed switching element is connected to the needle and cooperates with the inner wall ratchet structure. The first return spring is used to elastically push against the toothed switching element. The drive sleeve is used to drive the toothed switching element to move. The second return spring is disposed between the drive sleeve and the toothed switching element. The pressing element is connected to the drive sleeve and is used to drive the drive sleeve and the toothed switching element, causing the needle to switch between a puncture position, an airtight position, and a venting position. When the needle is in the venting position, the assembly end is connected to the side venting structure through the connecting hole, and can be cycled through single or multiple pressing operations.

Description

Press-to-switch gas cylinder puncture device Technical Field

[0001] This invention relates to a cylinder puncture device for air gun cylinders, and more particularly to a press-to-switch cylinder puncture device. Prior Technology

[0002] Generally speaking, air guns used for survival games, self-defense, or riot control typically use a gas cylinder to provide high-pressure gas as the power source for the bullets. When a new gas cylinder is loaded into the air gun, the cylinder seal is usually punctured through the nozzle to allow high-pressure gas to enter the gas supply system.

[0003] However, after using the air gun, to avoid safety concerns, it is usually necessary to release the pressure in the cylinder. Current common methods mainly involve pressing down or rotating the control knob to release pressure, and sometimes even requiring both hands to hold the cylinder steady. These methods are inconvenient, and if the control knob is accidentally pressed during the process, it may reset, stopping the pressure release and requiring the user to restart the process, which is very inconvenient. Summary of the Invention

[0004] Given that in previous technologies, existing air guns typically require releasing residual pressure from the cylinder after use to prevent accidents, the existing pressure release methods mainly involve pressing and holding or rotating the control knob, or even using both hands to hold the control knob in the pressure release position. This is not only cumbersome to operate but also prone to accidental stopping of pressure release, which is very inconvenient. Therefore, the main purpose of this invention is to provide a press-to-switch air cylinder puncture device that allows users to switch between air supply and release modes by pressing, making it more convenient for users to operate.

[0005] To address the problems of prior art, the necessary technical means employed in this invention is to provide a press-to-switch gas cylinder puncture device, comprising a base, a needle, a limiting end cap, a toothed switching component, a first return spring, a driving sleeve, a second return spring, and a pressing component.

[0006] The base has a connecting end and an operating end, as well as a partition, which are arranged opposite to each other. The connecting end is used to assemble with a gas cylinder mounting pipe and has a receiving space. The operating end has a movable space. The partition separates the receiving space and the movable space and has a connecting hole and at least one side venting structure. The connecting hole extends from the receiving space along an axial direction to the movable space. The at least one side venting structure extends from the connecting hole along a radial direction perpendicular to the axial direction to the outside of the base.

[0007] The needle is movably inserted through the connecting hole and has a piercing end and a set of connecting ends arranged opposite each other.

[0008] The limiting end cap is assembled to the operating end and has an inner end and an outer end. It has a through hole that passes through the inner end and the outer end, and an inner wall ratchet structure is provided near the inner end and the through hole. The inner wall ratchet structure includes a plurality of first limiting tooth grooves and a plurality of second limiting tooth grooves arranged alternately, and the extension length of the second limiting tooth groove is greater than the extension length of the first limiting tooth groove.

[0009] The toothed switching element is movably disposed within the moving space, fixed to the needle tip, and includes a plurality of radial protrusions.

[0010] The first return spring is provided in the movable space and elastically pushes against the toothed slot switching member, thereby pushing against the toothed slot switching member so that the radial protrusion is switchedly engaged with the first limiting toothed slot or the second limiting toothed slot.

[0011] The drive sleeve is movably disposed in the through hole to be operatively and elastically pushed against the radial protrusion, so that the radial protrusion alternately abuts against the first limiting groove or the second limiting groove.

[0012] The second return spring is located between the drive sleeve and the gear switching component to drive the drive sleeve to separate from the gear switching component.

[0013] The pressing component is assembled to the drive sleeve and is used by the user to push and operate the drive sleeve so that the needle tip can be switched between a puncture position, an airtight position and a deflation position by means of the toothed switching component. The needle tip is switched between the puncture position, airtight position and deflation position sequentially or alternately by single or multiple pressing operations. When the radial protrusion is engaged with the first limiting toothed groove, the toothed switching component is in the airtight position. When the radial protrusion is engaged with the second limiting toothed groove, the toothed switching component is in the deflation position.

[0014] In this configuration, when a gas cylinder is assembled into a gas cylinder mounting tube and one of the gas cylinder's sealing membranes is inserted into the accommodating space, the pressing element is used to drive the needle to the puncture position and puncture the sealing membrane; after the sealing membrane is punctured and the needle is in the airtight position, the needle seals and blocks the connecting hole, thus isolating the accommodating space from at least one side venting structure; after the sealing membrane is punctured and the needle is in the venting position, the accommodating space is connected to at least one side venting structure via the connecting hole.

[0015] In one of the auxiliary technical means derived from the aforementioned necessary technical means, the needle further includes an airtight ring, which is fixed between the puncture end and the assembly end to tightly fit the connecting hole. When the needle is in the venting position, the airtight ring is adjacent to the operating end so that the accommodating space is connected to at least one side venting structure through the connecting hole. When the needle is in the airtight position, the airtight ring is adjacent to the assembly end and isolates the accommodating space from at least one side venting structure.

[0016] In one of the auxiliary technical means derived from the aforementioned necessary technical means, the piercing end has a needle structure for piercing the sealing membrane. Preferably, the piercing end further has an annular end face, which extends outward from the needle structure to the circumference of the needle tip. Preferably, the annular end face is an inclined end face.

[0017] In one of the auxiliary technical means derived from the aforementioned necessary technical means, the toothed switching component further includes a switching part and a limiting part. The radial protrusion protrudes integrally from the circumferential surface of the switching part, and the limiting part extends integrally from the switching part and is used to extend into the drive sleeve.

[0018] Preferably, the drive sleeve further includes a drive end and a force-receiving end disposed opposite to each other. The drive end has a serrated end face and a limiting groove. The serrated end face is used to abut against the radial protrusion. The limiting part extends into the limiting groove, and the second return spring is disposed in the limiting groove and located between the limiting part and the drive sleeve.

[0019] In addition, the switching section is provided with a set-connection positioning groove, which is used to accommodate the positioning assembly end.

[0020] In one of the auxiliary technical means derived from the aforementioned necessary technical means, the side venting structure is a side venting hole. However, it is not limited to this; the side venting structure may also be a side venting groove with a connecting hole on the inner wall.

[0021] As described above, the press-to-switch gas cylinder puncture device of this invention mainly features a side venting structure connected to a connecting hole in the base. Through the ratchet structure on the inner wall of the limiting end cap and its meshing switching mechanism, the user can control the needle to switch between the puncture position, the airtight position, and the venting position by pressing the device. When the needle is in the venting position, the accommodating space can also be connected to the side venting structure through the connecting hole for venting. Therefore, the press-to-switch gas cylinder puncture device of this invention allows for easy changing of the needle position through a simple pressing operation. Furthermore, thanks to the return force provided by the first return spring and the cooperation between the inner wall ratchet structure and the meshing switching mechanism, the needle can be stably maintained in either the airtight or venting position, effectively preventing accidental contact from affecting the airtight or venting state.

[0022] The specific embodiments used in this work will be further explained through the following embodiments and drawings. Simple Explanation of the Diagram

[0023] The first figure shows an exploded perspective view of the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention; The second figure is a perspective view of the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention; The third figure shows a perspective cross-sectional view of the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention; Figure 4 shows an exploded perspective cross-sectional view of the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention; The fifth figure shows a cross-sectional view of the limiting end cap of this creation; Figure 6 is a perspective cross-sectional view showing the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention connected to the gas cylinder mounting tube, with the needle in the venting position; Figure 7 is an enlarged view of circle A in Figure 6; Figure 8 is an exploded perspective cross-sectional view showing the press-to-switch gas cylinder puncture device provided in the preferred embodiment of the present invention connected to the gas cylinder mounting tube, and the needle moving to the puncture position when the press member is pressed. Figure 9 is an exploded perspective cross-sectional view showing the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention connected to the gas cylinder mounting tube, with the press member pressed to move the needle to the airtight position; and Figure 10 shows a cross-sectional view of a press-to-switch gas cylinder puncture device provided in another preferred embodiment of the present invention, connected to a gas cylinder mounting tube, with the needle in an airtight position. Implementation

[0024] Please refer to Figures 1 through 4. Figure 1 is an exploded perspective view of the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention; Figure 2 is a perspective view of the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention; Figure 3 is a perspective cross-sectional view of the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention; and Figure 4 is an exploded perspective cross-sectional view of the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention.

[0025] As shown in Figures 1 to 4, a press-to-switch gas cylinder puncture device 100 includes a base 1, a needle 2, a limiting end cap 3, a toothed switching component 4, a first return spring 5, a driving sleeve 6, a second return spring 7, and a pressing component 8.

[0026] The base 1 includes a base body 11 and a sealing ring 12. The base body 11 has a connecting end 111, an operating end 112 and a partition 113; wherein the connecting end 111 and the operating end 112 are two ends arranged opposite to each other.

[0027] As described above, the assembly end 111 also has a receiving space 1111, and the operating end 112 also has a movable space 1121. The partition 113 is located between the assembly end 111 and the operating end 112 to separate the receiving space 1111 and the movable space 1121. Furthermore, the partition 113 also has a connecting hole 1131 and two side venting structures 1132 (only one is shown in the figure). The connecting hole 1131 extends from the receiving space 1111 along an axial direction D1 to the movable space 1121, while the side venting structure 1132 extends from the connecting hole 1131 along a radial direction D2 perpendicular to the axial direction D1 to the outside of the base 1. In this embodiment, the side venting structure 1132 is a side vent hole, and the side vent hole gradually expands outward from the inside along the radial direction D2, that is, the inner diameter of the side vent hole is smaller than the outer diameter.

[0028] The sealing ring 12 is fixed to the connecting hole 1131 near the operating end 112. Specifically, the connecting hole 1131 has a groove near the operating end 112 for the sealing ring 12 to be installed.

[0029] The needle 2 is movably inserted into the connecting hole 1131 and has a piercing end 21 and a set of connecting ends 22 disposed opposite to each other, and also has an airtight ring 23. The piercing end 21 has a needle structure 211 and an annular end face 212. The needle structure 211 is located at the center of the needle 2 and protrudes towards the connecting end 111 in the opposite direction of the axial direction D1. The annular end face 212 extends from the needle structure 211 to the circumferential surface of the needle 2. The airtight ring 23 is fixed between the piercing end 21 and the connecting end 22 and is adjacent to the piercing end 21, so as to tightly fit the connecting hole 1131 when the needle 2 is inserted into the connecting hole 1131 to achieve an airtight effect. The circumferential surface of the needle 2 is also provided with a groove for the airtight ring 23 to be accommodated. Please continue to refer to Figure 5, which is a cross-sectional schematic diagram of the limiting end cap of this invention. As shown in Figures 1 to 5, the limiting end cap 3 has an inner end 31 and an outer end 32, and a through hole 33 penetrating both the inner end 31 and the outer end 32. The limiting end cap 3 also has an inner wall ratchet structure 34 adjacent to the inner wall of the inner end 31. The inner wall ratchet structure 34 includes a plurality of staggered first limiting tooth grooves 341 (only one is shown in the figure) and a plurality of second limiting tooth grooves 342 (only one is shown in the figure). The extension length L2 of the second limiting tooth groove 342 in the axial direction D1 is greater than the extension length L1 of the first limiting tooth groove 341 in the axial direction D1. The inner end 31 is screwed to the operating end 12, and the outer end 32 has a stop inner ring 321 at the junction with the through hole 33. The inner diameter of the stop inner ring 321 is smaller than the inner diameter of the through hole 33.

[0030] The toothed switching component 4 includes a switching part 41, four radial protrusions 42 (only one is shown in the figure), and a limiting part 43. The toothed switching component 4 is movably disposed within the movable space 1121, and the assembly end 22 of the needle 2 is correspondingly engaged into one of the assembly positioning grooves 411 of the switching part 41, so that the user can secure the switching part 41 and the assembly end 22 together by screws.

[0031] Four radial protrusions 42 are integrally formed from the circumferential surface of the switching part 41 and protrude outward along the radial direction D2, and the four radial protrusions 42 correspond to the first limiting groove 341 or the second limiting groove 342. In this embodiment, the four radial protrusions 42 are evenly distributed and arranged to form a cross-shaped arrangement. However, in other embodiments, this is not limited to this, as long as there are two or more and they are evenly distributed, it can be implemented.

[0032] The limiting part 43 extends integrally from the switching part 41 along the axial direction D1. In this embodiment, the screw that locks the switching part 41 and the assembly end 22 enters the toothed switching member 4 through the hole and slot opened in the limiting part 43, and passes out from the switching part 41 to lock into the screw hole of the assembly end 22.

[0033] The first return spring 5 is sleeved on the needle 2 within the movable space 1121, and the two ends of the first return spring 5 elastically push against the separating part 113 and the switching part 41 respectively, thereby pushing against the toothed switching member 4 so that the radial protrusion 42 is switchedly engaged with the first limiting toothed groove 341 or the second limiting toothed groove 342.

[0034] The drive sleeve 6 includes a drive end 61 and a force-receiving end 62 disposed opposite to each other. The drive end 61 is movably disposed in the through hole 33 along the axial direction D1 and has a serrated end face 611 and a limiting groove 612. The serrated end face 611 is used to abut against the radial protrusion 42, and the limiting groove 612 extends along the axial direction D1 and is used to allow the limiting part 43 to extend into it, thereby restricting the reciprocating movement of the limiting part 43 along the axial direction D1.

[0035] The force-bearing end 62 is movably inserted into the stop inner ring 321 along the axial direction D1. In this embodiment, the diameter of the force-bearing end 62 is smaller than the diameter of the driving end 61. Therefore, when the driving sleeve 6 is pushed and moves along the axial direction D1, the stop inner ring 321 can prevent the driving end 61 from moving outside the through hole 33.

[0036] As described above, when the force-bearing end 62 moves in the opposite direction along the axial direction D1 under operative pressure, the serrated end face 611 pushes against the radial protrusion 42, thereby driving the radial protrusion 42. At the same time, the switching part 41 also moves accordingly, thereby elastically compressing the first return spring 5 that is in contact with it. Specifically, when the radial protrusion 42 was originally engaged with the first limiting tooth groove 341, the radial protrusion 42 will disengage from the first limiting tooth groove 341 due to the push from the serrated end face 611, and slide to the second limiting tooth groove 342 due to the return elastic force provided by the first return spring 5, and then engage with the second limiting tooth groove 342. Conversely, when the radial protrusion 42 was originally engaged with the second limiting tooth groove 342, the radial protrusion 42 will disengage from the second limiting tooth groove 342 due to the push from the serrated end face 611, and slide to the first limiting tooth groove 341 due to the return elastic force provided by the first return spring 5, and then engage with the first limiting tooth groove 341. In this way, the radial protrusion 42 can be switched to engage with the first limiting groove 341 or the second limiting groove 342 by the cooperation of the drive sleeve 6 and the first return spring 5.

[0037] The second return spring 7 is disposed in the limiting groove 612 and located between the limiting part 43 and the drive sleeve 6, and is used to elastically push against the toothed switching member 4 and the drive sleeve 6 to drive the drive sleeve 6 to separate from the toothed switching member 4.

[0038] The pressing member 8 includes a connecting part 81 and a pressing part 82. The connecting part 81 is screwed to the force-receiving end 62 of the drive sleeve 6, and the outer diameter of the connecting part 81 is the same as that of the force-receiving end 62. The pressing part 82 is integrally formed and connected to the connecting part 81, and is located outside the inner stop ring 321. That is, when the connecting part 81 is fixed to the force-receiving end 62, the drive end 61 and the pressing part 82 will be separated by the inner stop ring 321 and located opposite each other on the inner and outer sides of the inner stop ring 321.

[0039] As mentioned above, the pressing part 82 is used by the user to press and push against the operating drive sleeve 6, thereby driving the toothed switching part 4 to reciprocate along the axial direction D1, so that the needle 2 switches between a puncture position, an airtight position and an air-vented position.

[0040] Please refer to Figures 6 and 7. Figure 6 is a three-dimensional cross-sectional view showing the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention connected to the gas cylinder mounting tube, with the needle in the venting position. Figure 7 is an enlarged schematic diagram of circle A in Figure 6.

[0041] As shown in Figures 6 and 7, in practical application, the press-to-switch gas cylinder puncture device 100 of this invention is connected to a gas cylinder mounting tube 200 via a connecting end 111, and a gas cylinder 300 is installed inside the gas cylinder mounting tube 200. The gas cylinder mounting tube 200 is actually installed on an air gun, for example, at the handle of the air gun, and after the gas cylinder mounting tube 200 is installed on the air gun, it is connected to the air gun's air supply system. Furthermore, after the press-to-switch gas cylinder puncture device 100 is connected to the gas cylinder mounting tube 200 via the connecting end 111, a sealing membrane 301 of the gas cylinder 300 extends into the receiving space 111.

[0042] As described above, the preset starting position of the needle 2 is the venting position, which is the position shown in the second, third, sixth, and seventh figures. When the needle 2 is in the venting position, the radial protrusion 42 is correspondingly engaged with the second limiting groove 342, and the airtight ring 23 will be located between the side venting structure 1132 and the operating end 112 as the needle 2 moves to the venting position, thereby allowing the accommodating space 1111 to be connected to the side venting structure 1132 through the connecting hole 1131. In addition, although the side venting structure 1132 is a side venting hole in this embodiment, it is not limited to this. In other embodiments, the side venting structure 1132 can also refer to any structure that can form a gas communication path when the needle 2 moves to the venting position, and is not limited to its specific shape. For example, the side venting structure 1132 can also be a side venting groove extending towards the operating end 112 from the inner wall of the connecting hole 1131.

[0043] Please refer to Figure 8. Figure 8 is an exploded three-dimensional cross-sectional view showing the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention connected to the gas cylinder mounting tube, and the press member being pressed to move the needle to the puncture position.

[0044] As shown in Figures 1 to 8, when the pressing part 82 of the pressing member 8 is pressed and moves in the opposite direction along the axial direction D1 to abut the outer end 32, the connecting part 81 will drive the connected drive sleeve 6 to move in the opposite direction along the axial direction D1, so that the serrated end face 611 pushes the radial protrusion 42 away from the second limiting tooth groove 342. At the same time, the entire needle 2 will be pushed to the piercing position, so that the needle structure 211 pierces the sealing film 301. At this time, the airtight ring 23 will also move between the assembly end 111 and the side venting structure 1132.

[0045] It should be further explained that when the pressing member 8 moves the needle 2 from the deflation position to the puncture position, the first return spring 5 will be elastically compressed by the switching part 41 and the separating part 113 due to the pushing of the switching part 41.

[0046] Please refer to Figure 9, which is an exploded three-dimensional cross-sectional view showing the press-to-switch gas cylinder puncture device provided in the preferred embodiment of this invention connected to the gas cylinder mounting tube, and the needle moving to the airtight position when the pressing component is pressed.

[0047] As shown in Figures 1 to 9, after the user presses the pressing part 82 to move the needle 2 from the initial deflation position to the puncture position and complete the puncture action of piercing the sealing film 301, the user can stop pushing the pressing part 82 (i.e., release the pressing part 82). At this time, the compressed first return spring 5 will generate a return force to push the switching part 41 and cause the radial protrusion 42 to slide to the first limiting groove 341, thereby driving the needle 2 to move to the airtight position. At the same time, the airtight ring 23 will block the connecting hole 1131 between the assembly end 111 and the side deflation structure 1132 because it is tightly attached to the inner wall of the connecting hole 1131, so that the accommodating space 1111 and the side deflation structure 1132 are isolated from each other.

[0048] As described above, when the needle 2 moves to the airtight position, the needle structure 211 moves away from the sealing membrane 301, allowing the high-pressure gas inside the gas cylinder 300 to be supplied to the accommodating space 1111 through the punctured sealing membrane 301, and then supplied to the gas cylinder mounting tube 200 and the connected gas supply system. This prevents the needle 2 from directly bearing the pressure of the high-pressure gas, and also reduces the pressure on the airtight ring 23, thereby improving the stability of the seal. This effectively reduces the operating resistance and improves the switching stability.

[0049] Furthermore, when the user finishes using the air gun and needs to release the gas in the gas cylinder 300, the user can press the pressing member 8 again. At this time, the serrated end face 611 will push the radial protrusion 42 away from the first limiting tooth groove 341, so that the needle 2 returns from the airtight position to the initial venting position. In this way, the gas remaining in the gas cylinder 300 can be connected to the side venting structure 1132 through the accommodating space 1111 and the connecting hole 1131, thereby releasing the gas to the outside of the base 1.

[0050] Please refer to Figure 10, which is a cross-sectional view showing the press-to-switch gas cylinder puncture device provided in another preferred embodiment of the present invention connected to the gas cylinder mounting tube, with the needle in the airtight position.

[0051] As shown in Figure 10, another preferred embodiment of this invention provides another press-to-switch gas cylinder puncture device 100a, which also includes a base 1a, a needle 2a, a limiting end cap 3a, a toothed switching component 4a, a first return spring 5a, a driving sleeve 6a, a second return spring 7a, and a pressing component 8a.

[0052] As described above, the press-to-switch gas cylinder puncture device 100a is structurally similar to the press-to-switch gas cylinder puncture device 100. The main difference lies in that the annular end face 212a of the puncture end 21a is an inclined end face, which extends obliquely outward from the needle structure 211a to the circumference of the needle head 2a. When the press-to-switch gas cylinder puncture device 100a is connected to the gas cylinder mounting tube 200a, and the needle head 2a is in an airtight position after puncturing the gas cylinder 300a, the needle head... The airtight ring (not shown in the figure) set in 2a can effectively seal and isolate the connecting hole 1131a, allowing the high-pressure gas released from the gas cylinder 300a to flow into the gas cylinder installation tube 200a through the connecting hole 1131a. At the same time, the high-pressure gas will also apply pressure to the puncture end 21a along the axial direction D1a. If the user still needs to drive the needle 2 to move in the opposite direction along the axial direction D1a again through the pressing member 8 when there is sufficient high-pressure gas, they often need to resist the pressure brought by the high-pressure gas.

[0053] However, since the annular end face 212a of this embodiment is an inclined end face, when the user presses the pressing member 8a to drive the needle 2 to move in the opposite direction along the axial direction D1a, the inclined extension of the annular end face 212a can concentrate the force point against the air pressure on the inner edge of the annular end face 212a, making it easier for the user to press. Compared with the annular end face 212 of the above embodiment, which is flat and difficult to compress high-pressure gas, the annular end face 212a of this embodiment is an inclined end face, which can save more effort.

[0054] Furthermore, the side venting structure 1132a in this embodiment also extends radially from the connecting hole 1131a along D2a. However, compared to the connecting hole 1131a in the above embodiment which extends gradually along D2a, the side venting structure 1132a in this embodiment extends at a constant diameter along D2a.

[0055] In summary, compared to existing air guns that primarily rely on cumbersome operations to control the gas supply or depressurization of the cylinder, and are easily affected by accidental activation, this invention's push-to-switch gas cylinder puncture device utilizes a side-venting structure on the base. The needle position is controlled by a ratchet mechanism on the inner wall and a toothed switching element. When the needle is in the airtight position, it seals and blocks the connecting hole, isolating the containing space from the side-venting structure, allowing the high-pressure gas supplied by the cylinder to effectively fill the cylinder. The air gun's air supply system allows residual gas to be released to the outside through the connection between the side venting structure and the accommodating space when the needle is in the venting position. In this way, the invention can indeed control the needle to switch between the puncture position, the airtight position, and the venting position through the pressing part. Moreover, thanks to the return spring provided by the first return spring and the cooperation of the inner wall ratchet structure and the toothed switching part, the needle can be stably maintained in the airtight or venting position, effectively avoiding the airtight or venting state being affected by accidental contact.

[0056] The detailed description of the preferred embodiments above is intended to more clearly illustrate the features and spirit of this invention, and is not intended to limit the scope of this invention with the preferred embodiments disclosed above. Rather, the aim is to cover various modifications and equivalent arrangements within the scope of the patent claims to which this invention is intended.

[0057] 100: Press-to-switch gas cylinder puncture device 1: Base 11: Base Body 111: Assembly end 1111: Storage space 112: Operating end 1121: Activity Space 113: Divider 1131: Connecting hole 1132: Side venting structure 12: Sealing ring 13: Fixing plate 14: Fixed plug ring 2: Needle 21: Piercing the end 211: Needle structure 212: Annular end face 22: Assembly Terminal 23: Airtight Ring 3: Limiting end cap 31: Inner end 32: Outer end 321: Stop inner ring 33: Perforation 34: Inner wall ratchet structure 341: First limiting tooth groove 342: Second limiting tooth groove 4: Gear switching component 41: Switching Unit 411: Assembly positioning slot 42: Radial bump 43: Limiting part 5: First return spring 6: Drive sleeve 61: Driver end 611: Serrated end face 612: Limiting groove 62: Force-bearing end 7: Second Returning Spring 8: Pressing component 81: Connecting part 82: Pressing part 200: Gas cylinder installation pipe 300: Gas Cylinder 301:Sealing film D1: Axial direction D2: Radial L1, L2: Extension length

Claims

1. A press-to-switch gas cylinder puncture device, comprising: a base having a connecting end and an operating end disposed opposite to each other, and a partition portion, the connecting end being for assembly to a gas cylinder mounting tube and having an accommodating space, the operating end having an movable space, the partition portion separating the accommodating space and the movable space, and having a connecting hole and at least one side venting structure, the connecting hole extending axially from the accommodating space to the movable space, and the at least one side venting structure extending radially from the connecting hole perpendicular to the axial direction to communicate with the outside of the base; and a needle movably inserted into the connecting hole and having a puncture end and a connecting end disposed opposite to each other. A limiting end cap, assembled to the operating end, has an inner end and an outer end, and a through hole penetrating the inner end and the outer end. An inner wall ratchet structure is provided adjacent to the inner end and the through hole. The inner wall ratchet structure includes a plurality of staggered first limiting tooth grooves and a plurality of second limiting tooth grooves, with the extension length of the second limiting tooth grooves being greater than the extension length of the first limiting tooth grooves. A tooth groove switching member is movably disposed within the movable space, fixed to the needle tip, and includes a plurality of radial protrusions. A first return spring is disposed in the movable space and elastically pushes against the tooth groove switching member, thereby pushing the tooth groove switching member to cause the radial protrusions to switchably engage with the first limiting tooth grooves or the second limiting tooth grooves. A drive sleeve, movably disposed in the perforation, is operably and elastically pushed against the radial protrusions, causing the radial protrusions to alternately abut against the first or second limiting tooth grooves; a second return spring is disposed between the drive sleeve and the tooth groove switching member to drive the drive sleeve to separate from the tooth groove switching member; and a pressing member is assembled to the drive sleeve for the user to push and operate the drive sleeve, so that the tooth groove switching member switches the needle tip between a puncture position, an airtight position, and a deflated position. When the radial protrusions are engaged with the first limiting tooth grooves, the tooth groove switching member is in the airtight position; when the radial protrusions are engaged with the second limiting tooth grooves, the tooth groove switching member is in the deflated position. When a gas cylinder is assembled into the gas cylinder mounting tube and one of the gas cylinder's sealing membranes extends into the accommodating space, the pressing member is used to drive the needle to the puncture position and puncture the sealing membrane; after the sealing membrane is punctured and the needle is in the airtight position, the needle seals and blocks the connecting hole, thus isolating the accommodating space from the at least one side venting structure; after the sealing membrane is punctured and the needle is in the venting position, the accommodating space is connected to the at least one side venting structure through the connecting hole.

2. The press-to-switch gas cylinder puncture device as described in claim 1, wherein, The needle further includes an airtight ring disposed between the puncture end and the assembly end to tightly fit the connecting hole. When the needle is in the venting position, the airtight ring is adjacent to the operating end, allowing the accommodating space to connect to the at least one side venting structure via the connecting hole. When the needle is in the airtight position, the airtight ring is adjacent to the assembly end, isolating the accommodating space from the at least one side venting structure.

3. The press-to-switch gas cylinder puncture device as described in claim 1, wherein, The puncture end has a needle structure for puncturing the sealing film.

4. The press-to-switch gas cylinder puncture device as described in claim 3, wherein, The puncture end also has an annular end face that extends outward from the needle structure to the circumference of the needle tip.

5. The press-to-switch gas cylinder puncture device as described in claim 4, wherein, The annular end face is an inclined end face.

6. The press-to-switch gas cylinder puncture device as described in claim 1, wherein, The toothed switching component further includes a switching part and a limiting part. The radial protrusions are integrally formed from the circumferential surface of the switching part, and the limiting part is integrally formed from the switching part and is used to extend into the drive sleeve.

7. The press-to-switch gas cylinder puncture device as described in claim 6, wherein, The drive sleeve further includes a drive end and a force-receiving end disposed opposite to each other. The drive end has a serrated end face and a limiting groove. The serrated end face is used to abut against the radial protrusions. The limiting part extends into the limiting groove, and the second return spring is disposed in the limiting groove and located between the limiting part and the drive sleeve.

8. The press-to-switch gas cylinder puncture device as described in claim 6, wherein, The switching unit is further provided with a set of connection positioning slots, which are used to accommodate and position the set of connection terminals.

9. The press-to-switch gas cylinder puncture device as described in claim 1, wherein, The side venting structure consists of a side vent.

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