Inflation device with improved structure

Abstract

The utility model discloses an inflating device with an improved structure and belongs to the technical field of water life-saving equipment. Comprising an inflation device body, an opening is formed downwards in the inflation device body, a containing cavity is formed in the opening, and a trigger mounting base and a gas cylinder mounting base are arranged on the left side and the right side of the upper portion of the inflation device body side by side; the trigger is mounted on the trigger mounting seat and comprises a trigger shell, a trigger assembly, a trigger spring, an excitation piece and a water-soluble compression piece; the indicator inner shell is arranged in the accommodating cavity of the inflating device main body in a sliding manner and is positioned below the trigger mounting seat; the pricking needle assembly is arranged in the accommodating cavity of the inflating device main body, is positioned below the gas cylinder mounting seat and can slide up and down; the excitation handle is arranged below the indicator inner shell and the pricking needle assembly and is hinged with the inflating device main body; and the gas cylinder is arranged on the gas cylinder mounting seat and is connected with the trigger in parallel. The air inflation device has the advantages that the overall height of the device is reduced, and the air inflation device is more suitable for small life-saving equipment; and the recycling cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water lifesaving equipment, and in particular relates to an inflatable device with an improved structure. Background Art

[0002] With the continuous upgrading of life-saving equipment, the safety requirements of equipment are getting higher and higher, and it is gradually developing towards the trend of miniaturization and portability. In some self-inflating lifebuoys and life jackets, the inflating device is one of the components that occupies the largest space. At present, the inflating device generally adopts a structure in which the inflating device body, trigger and gas cylinder are installed in a straight line. This straight-line installation structure leads to a long length, which is not conducive to reducing the overall height of the life-saving equipment; in addition, in the inflating device, the trigger is one of the most important components, and generally has two functions of manual triggering and automatic triggering. When automatically triggered, the spring pressure is usually released to push the ejector pin to pierce the gas cylinder. The way of locking the spring elastic force directly affects the speed and strength of the trigger. The faster the trigger speed and the greater the strength, the higher the safety of the life-saving equipment. On the contrary, the lifebuoy will not inflate in time and the gas cylinder will not be pierced, causing the life-saving equipment to fail, so there is a safety hazard. However, in order to save the cost of the inflation device and reduce the cost of recycling, the size of the spring needs to be reduced as much as possible. The greater the spring force, the thicker the spring and the more difficult it is to compress it, the higher the relative cost and it is difficult for an individual to re-compress the spring.

[0003] In the existing technology, such as the "water sensor trigger" provided by China Utility Model Patent Authorization Announcement No. CN216834217U, and the "dual-purpose life-saving inflatable device on water" disclosed in China Utility Model Patent Authorization Announcement No. CN2685231Y, both use the linear installation structure described above, so both have the problem of being not conducive to reducing the overall height of the life-saving equipment; at the same time, the former uses a water-sensitive paper trigger structure when releasing the spring elastic force. Although the spring elastic force that can be locked is relatively large, there is a problem: the cost is high. When recycling is required, not only the water-sensitive paper needs to be replaced, but also the spring, the trigger rod and other complete components including the water-sensitive paper need to be replaced, resulting in a high recycling cost.

[0004] In view of the above situation, it is necessary to design an inflatable device with a simple structure, low cost, and the ability to effectively reduce the overall height, facilitate the replacement of trigger accessories by individuals, and have a low recycling cost. To this end, the applicant has made a useful design, and the technical solution to be introduced below is produced under this background. Utility Model Content

[0005] The object of the present utility model is to provide an inflation device with an improved structure, which helps to improve the structure of the inflation device body so that the trigger and the gas cylinder can be installed in parallel, greatly reducing the overall height and making the inflation device more suitable for life-saving equipment with small size requirements. It is beneficial to improve the trigger structure so that the inflation device can be recycled and reused only by replacing the firing element, greatly reducing the cost of recycling and reuse.

[0006] The object of the present utility model is achieved as follows. An inflation device with an improved structure includes an inflation device main body. The inflation device main body forms an opening downward and a receiving cavity is formed in the opening. On the left and right sides above the inflation device main body, a trigger mounting seat and a gas cylinder mounting seat are formed in parallel. A trigger mounted on the trigger mounting seat, the trigger includes a trigger housing, a trigger assembly disposed within and connected to the trigger housing, a trigger spring sleeved above the trigger assembly, a firing element abutted below the trigger assembly, and a water-soluble compression sheet disposed within the firing element. An indicator inner shell slidably disposed up and down in the receiving cavity of the inflation device main body and located below the trigger mounting seat. A needle assembly also disposed in the receiving cavity of the inflation device main body and located below the gas cylinder mounting seat and capable of sliding up and down. A firing handle disposed below the indicator inner shell and the needle assembly and hinged to the inflation device main body. A gas cylinder disposed on the gas cylinder mounting seat and arranged in parallel with the trigger.

[0007] In a specific embodiment of the present utility model, an installation hole penetrating through the front and rear is formed at the position between the trigger mounting seat and the gas cylinder mounting seat of the inflation device main body. Sealing rings for the installation hole are respectively embedded at the front and rear edges of the installation hole. An air inlet hole is formed on the inner wall of the installation hole, and the air inlet hole is communicated with the gas cylinder mounting seat.

[0008] In another specific embodiment of the present utility model, firing handle shaft holes are respectively formed on the front and rear side walls of the trigger mounting seat of the inflation device main body. The firing handle is rotatably supported on the firing handle shaft holes through a firing handle shaft. One end of the firing handle abuts below the needle assembly, and the other end abuts on the indicator inner shell. A pull rope is also connected to the end of the other end of the firing handle, i.e., the end far from the needle assembly. A pull pellet is fixed on the pull rope.

[0009] In still another specific embodiment of the present utility model, a trigger mounting seat cavity with an upward opening and communicated with the receiving cavity of the inflation device main body is formed on the trigger mounting seat. The trigger assembly, the trigger spring and the firing element of the trigger are disposed in the trigger mounting seat cavity. External threads are formed on the outer side wall of the trigger mounting seat. Internal threads for screwing and fixing with the external threads are formed on the inner wall at the lower end of the trigger housing of the trigger.

[0010] In still another specific embodiment of the present utility model, a gas cylinder mounting seat cavity is formed on the gas cylinder mounting seat, which has an upward opening and is communicated with the accommodation cavity of the inflation device main body. The inner wall of the gas cylinder mounting seat cavity is in threaded connection with the bottle mouth of the gas cylinder, and a sealing gasket is arranged between the bottom of the gas cylinder mounting seat cavity and the gas cylinder.

[0011] In still another specific embodiment of the present utility model, the inner shell of the indicator is snapped into the accommodation cavity of the inflation device main body from bottom to top through a group of indicator inner shell snap fasteners. A clamping groove for cooperating with the indicator inner shell snap fasteners is formed on the inner wall of the accommodation cavity of the inflation device main body. An inflation device main body indicator window is opened at the position of the inflation device main body corresponding to the inner shell of the indicator. A boosting spring is arranged between the upper part of the inner shell of the indicator and the inflation device main body. An abnormal color indicating area is formed at the lower end on one side of the inner shell of the indicator corresponding to the position of the inflation device main body indicator window. When the inflation device is in an unused state, the abnormal color indicating area is located at the position where the inflation device main body indicator window is located. When the inflation device is in a used state, the abnormal color indicating area is located at a position below the inflation device main body indicator window and shows the color of the inner shell body of the indicator, and the two colors are different.

[0012] In yet another specific embodiment of the present utility model, a trigger assembly clamping hole is formed in the middle of the upper end of the trigger housing. A connecting rod is formed in the middle of the upper end surface of the trigger assembly. A connecting clamping foot is formed at the upper end of the connecting rod. The trigger spring is sleeved on the connecting rod. The connecting clamping foot is used for clamping connection with the trigger assembly clamping hole. A firing rod extending downward is formed in the middle of the lower end surface of the trigger assembly. The upper end of the trigger spring abuts against the inner top wall of the trigger housing, and the lower end abuts against the trigger assembly and is in a compressed state. A convex platform is formed in the middle of the firing rod. The firing part is sleeved on the end of the firing rod and abuts against the convex platform. A circle of limiting clamping feet is formed at intervals around the firing rod in the middle of the firing part. An upward-opening groove is formed at the position between the outer wall of the firing part and the limiting clamping feet. The water-soluble compression sheet is embedded in the groove and keeps the limiting clamping feet close to the firing rod side to hold the convex platform in a state where it cannot pass through the firing part.

[0013] In still another specific embodiment of the present utility model, the water-soluble compression sheet is a ring structure formed by compressing water-soluble powder.

[0014] In yet another specific embodiment of the present utility model, a thimble that penetrates into the gas cylinder mounting seat and abuts against the gas cylinder is formed at the upper end of the thimble assembly. A thimble assembly sealing ring is sleeved on the outer wall of the thimble assembly, and the thimble assembly sealing ring is used to prevent the gas in the gas cylinder from overflowing from around the thimble assembly.

[0015] In yet another specific embodiment of the present utility model, the cross-section of the mounting hole is in the shape of the letter "D".

[0016] After the present utility model adopts the above structure, it has the following beneficial effects: First, since the trigger mounting seat and the gas cylinder mounting seat for mounting the trigger and the gas cylinder are respectively arranged in parallel on the left and right sides above the main body of the inflation device, the two are in a parallel connection state, thus greatly reducing the overall height of the device and making the inflation device more suitable for life-saving equipment with small size requirements; Second, since the structure of arranging a water-soluble compression sheet in the trigger to abut against the trigger assembly to compress the trigger spring is adopted, as long as the excitation member with the water-soluble compression sheet is replaced and the trigger housing is rotated, the trigger spring can be automatically compressed, greatly reducing the cost of recycling. Brief Description of the Drawings

[0017] Figure 1 is a schematic perspective view of an embodiment of the present utility model;

[0018] Figure 2 is a schematic structural view of the trigger of an embodiment of the present utility model;

[0019] Figure 3 is a schematic plan view of an embodiment of the present utility model.

[0020] In the figure: 1. Main body of the inflation device, 11. Trigger mounting seat, 111. Trigger mounting seat cavity, 112. External thread, 12. Gas cylinder mounting seat, 121. Gas cylinder mounting seat cavity, 1211. Sealing gasket, 13. Mounting hole, 131. Air inlet hole, 14. Excitation handle shaft hole, 15. Indication window of the main body of the inflation device, 16. Card slot, 17. Mounting hole sealing ring; 2. Trigger, 21. Trigger housing, 211. Internal thread, 212. Trigger assembly card hole, 22. Trigger assembly, 221. Connecting rod, 222. Excitation rod, 223. Boss, 224. Connecting card foot, 23. Trigger spring, 24. Excitation member, 241. Embedded groove, 242. Limit card foot, 25. Water-soluble compression sheet; 3. Gas cylinder; 4. Inner shell of the indicator, 41. Boosting spring, 42. Different-color indication area, 43. Inner shell buckle of the indicator; 5. Needle assembly, 51. Thumb pin, 52. Needle assembly sealing ring; 6. Excitation handle, 61. Excitation handle shaft, 62. Pulling rope, 63. Pulling pill. Detailed Description of the Embodiment

[0021] The following will describe in detail the specific embodiments of the present utility model in conjunction with the drawings. However, the description of the embodiments is not a limitation of the technical solution. Any change in form rather than in substance based on the concept of the present utility model should be regarded as the protection scope of the present utility model.

[0022] In the following description, all concepts related to the directionality or orientation of up, down, left, right, front, and back are based on the Figure 1 position shown, and thus cannot be understood as a special limitation on the technical solution provided by the present utility model.

[0023] Please refer to Figure 1 , the present utility model relates to an inflating device with an improved structure, including an inflating device main body 1. The inflating device main body 1 forms an opening downward and constitutes a receiving cavity inside the opening. On the left and right sides above the inflating device main body 1, a trigger mounting seat 11 and a gas cylinder mounting seat 12 are juxtaposed; a trigger 2 mounted on the trigger mounting seat 11, the trigger 2 includes a trigger housing 21, a trigger assembly 22 disposed inside the trigger housing 21 and connected to the trigger housing 21, a trigger spring 23 sleeved above the trigger assembly 22, an actuating member 24 abutted below the trigger assembly 22, and a water-soluble compression sheet 25 disposed inside the actuating member 24; an indicator inner shell 4, the indicator inner shell 4 is slidably disposed up and down in the receiving cavity of the inflating device main body 1 and is located below the trigger mounting seat 11; a needle assembly 5, the needle assembly 5 is also disposed in the receiving cavity of the inflating device main body 1 and is located below the gas cylinder mounting seat 12 and can slide up and down; an actuating handle 6, the actuating handle 6 is disposed below the indicator inner shell 4 and the needle assembly 5 and is hinged to the inflating device main body 1; a gas cylinder 3, the gas cylinder 3 is disposed on the gas cylinder mounting seat 12 and is arranged in parallel with the trigger 2.

[0024] Furthermore, the inflating device main body 1 constitutes a front-to-back through mounting hole 13 at the position between the trigger mounting seat 11 and the gas cylinder mounting seat 12. Sealing rings 17 for the mounting hole are respectively embedded at the front and rear edges of the mounting hole 13. An air inlet hole 131 is opened on the inner wall of the mounting hole 13, and the air inlet hole 131 communicates with the gas cylinder mounting seat 12. The cross-section of the mounting hole 13 is in the shape of the letter "D". On the front and rear side walls of the trigger mounting seat 11 of the inflating device main body 1, an actuating handle shaft hole 14 is respectively opened. The actuating handle 6 is rotatably supported on the actuating handle shaft hole 14 through an actuating handle shaft 61. One end of the actuating handle 6 abuts below the needle assembly 5, and the other end abuts against the indicator inner shell 4. A pull rope 62 is further connected to the other end of the actuating handle 6, that is, the end far from the needle assembly 5. A pull pellet 63 is fixed on the pull rope 62.

[0025] In this embodiment, a trigger mounting seat cavity 111 is formed on the aforementioned trigger mounting seat 11. The trigger mounting seat cavity 111 has an upward opening and is communicated with the accommodation cavity of the inflation device main body 1. The trigger assembly 22, the trigger spring 23 and the firing member 24 of the aforementioned trigger 2 are arranged in the trigger mounting seat cavity 111. An external thread 112 is formed on the outer side wall of the aforementioned trigger mounting seat 11. An internal thread 211 for screwing and fixing with the external thread 112 is formed on the inner wall of the lower end of the trigger housing 21 of the aforementioned trigger 2.

[0026] Furthermore, a gas cylinder mounting seat cavity 121 is formed on the aforementioned gas cylinder mounting seat 12. The gas cylinder mounting seat cavity 121 has an upward opening and is communicated with the accommodation cavity of the inflation device main body 1. The inner wall of the gas cylinder mounting seat cavity 121 is threadedly connected to the mouth of the gas cylinder 3. A sealing gasket 1211 is arranged between the bottom of the gas cylinder mounting seat cavity 121 and the gas cylinder 3.

[0027] In this embodiment, the aforementioned indicator inner shell 4 is snapped into the accommodation cavity of the inflation device main body 1 from bottom to top through a set of indicator inner shell snaps 43. A clamping groove 16 for cooperating with the indicator inner shell snaps 43 is formed on the inner wall of the accommodation cavity of the inflation device main body 1. An inflation device main body indicator window 15 is opened at a position corresponding to the indicator inner shell 4 on the inflation device main body 1. A boosting spring 41 is arranged between the upper part of the indicator inner shell 4 and the inflation device main body 1. A different-color indication area 42 is formed at a position corresponding to the inflation device main body indicator window 15 at the lower end of one side of the indicator inner shell 4. When the inflation device is in an unused state, the aforementioned different-color indication area 42 is located at the position where the inflation device main body indicator window 15 is located. When the inflation device is in a used state, the aforementioned different-color indication area 42 is located below the inflation device main body indicator window 15 to display the color of the indicator inner shell 4 itself, and the two colors are different.

[0028] Please refer to Figure 2 and in combination with Figure 1The trigger assembly card hole 212 is formed in the middle of the upper end of the trigger housing 21, and a connecting rod 221 is formed in the middle of the upper end surface of the trigger assembly 22. The upper end of the connecting rod 221 is formed with a connecting foot 224. The trigger spring 23 is sleeved on the connecting rod 221. The connecting foot 224 is used to be snap-connected with the trigger assembly card hole 212. The lower end surface of the trigger assembly 22 is formed with an excitation rod 222 extending downward. The upper end of the trigger spring 23 abuts against the inner top wall of the trigger housing 21, and the lower end abuts against the trigger assembly 22. The actuating member 24 is sleeved on the end of the actuating member 222 and abuts against the boss 223. The actuating member 24 is provided with a circle of limiting pins 242 at intervals around the actuating member 222 in the middle. The actuating member 24 has an embedding groove 241 with an opening upward at a position between the outer wall and the limiting pin 242. The water-soluble compression sheet 25 is embedded in the embedding groove 241 to keep the limiting pin 242 close to one side of the actuating member 222 and tightly hold the boss 223 so that the boss 223 cannot pass through the actuating member 24.

[0029] Furthermore, the aforementioned water-soluble compressed tablet 25 is a ring-shaped structure formed by compressing a water-soluble powder. This product can be purchased directly from the market and is a water-soluble tablet used in an automatic inflatable life jacket.

[0030] Furthermore, the upper end of the aforementioned puncture needle assembly 5 is formed with a pin 51 that penetrates into the gas cylinder mounting seat 12 and rests on the gas cylinder 3. A puncture needle assembly sealing ring 52 is sleeved on the outer wall of the aforementioned puncture needle assembly 5. The puncture needle assembly sealing ring 52 is used to prevent the gas in the gas cylinder 3 from overflowing from around the puncture needle assembly 5.

[0031] See also Figure 1 , Figure 2 and Figure 3, during actual use, the inflating device is fixed on the lifebuoy or life jacket through the aforementioned mounting holes 13 and screws and nuts. The screw is of a hollow structure and communicates with the air inlet hole 131. One end of the screw leads to the inside of the lifebuoy or life jacket. When the aforementioned pulling pill 63 is pulled, the aforementioned firing handle 6 rotates counterclockwise around the firing handle shaft 61 and the end close to the needle assembly 5 is lifted upward, causing the thimble 51 of the aforementioned needle assembly 5 to displace upward and pierce the gas cylinder 3. The gas in the gas cylinder 3 enters the hollow screw through the air inlet hole 131 and inflates the lifebuoy or life jacket, thus completing the manual firing process of the inflating device; when the inflating device falls into the water, the aforementioned water-soluble compression sheet 25 absorbs water and disintegrates and melts after coming into contact with water. The aforementioned limiting leg 242 opens towards the side of the slot 241. The aforementioned trigger spring 23 releases elastic potential energy and instantaneously pushes the trigger assembly 22 to eject downward. At this time, the aforementioned boss 223 can smoothly pass through the circular hole surrounded by the limiting legs 242. The trigger rod 222 on the aforementioned trigger assembly 22 hits downward on the inner shell 4 of the indicator, causing the inner shell 4 of the indicator to push the firing handle 6 to rotate counterclockwise around the firing handle shaft 61. One end of the aforementioned firing handle 6 upwardly pierces the needle assembly 5. The thimble 51 of the aforementioned needle assembly 5 displaces upward and pierces the gas cylinder 3. The gas in the gas cylinder 3 enters the hollow screw through the air inlet hole 131 and inflates the lifebuoy or life jacket, thus completing the automatic firing process of the inflating device.

[0032] After the present utility model adopts the above structure, not only the overall height and volume of the inflating device are effectively reduced, but also during actual use and in the water-falling state, through the manual and automatic firing processes, the inflation of the lifebuoy or life jacket can be realized. The operation is simple, the working stability is good, and the use is safe and reliable. Moreover, since this device only needs to replace the firing part with the water-soluble compression sheet, it can be reused, greatly reducing the cost of recycling and reuse, and can be widely applied to water rescue and disaster relief.

Claims

1. An inflating device with improved structure, characterized in that: It includes an inflation device main body (1). The inflation device main body (1) is formed with an opening downward and a receiving cavity is formed within the opening. On the left and right sides above the inflation device main body (1), a trigger mounting seat (11) and a gas cylinder mounting seat (12) are juxtaposed; a trigger (2) mounted on the trigger mounting seat (11), the trigger (2) includes a trigger housing (21), a trigger assembly (22) disposed within the trigger housing (21) and connected to the trigger housing (21), a trigger spring (23) sleeved above the trigger assembly (22), an actuating member (24) abutted against the lower part of the trigger assembly (22), and a water-soluble compression sheet (25) disposed within the actuating member (24); an indicator inner shell (4) which is slidably arranged up and down within the receiving cavity of the inflation device main body (1) and is located below the trigger mounting seat (11); a needle assembly (5) which is also arranged within the receiving cavity of the inflation device main body (1) and is located below the gas cylinder mounting seat (12) and can slide up and down; an actuating handle (6) which is arranged below the indicator inner shell (4) and the needle assembly (5) and is hinged to the inflation device main body (1); a gas cylinder (3) which is arranged on the gas cylinder mounting seat (12) and is arranged in parallel with the trigger (2).

2. The inflating device with improved structure according to claim 1, characterized in that: At the position between the trigger mounting seat (11) and the gas cylinder mounting seat (12) of the inflation device main body (1), a mounting hole (13) penetrating through the front and back is formed. Sealing rings (17) of the mounting hole are respectively embedded at the front and back edges of the mounting hole (13). An air inlet hole (131) is formed on the inner wall of the mounting hole (13), and the air inlet hole (131) is communicated with the gas cylinder mounting seat (12).

3. The improved inflating device according to claim 1, wherein: On the front and back side walls of the trigger mounting seat (11) of the inflation device main body (1), an actuating handle shaft hole (14) is respectively formed. The actuating handle (6) is rotatably supported on the actuating handle shaft hole (14) through an actuating handle shaft (61). One end of the actuating handle (6) abuts against the lower part of the needle assembly (5) above, while the other end abuts against the indicator inner shell (4). A pull rope (62) is further connected to the end of the other end of the actuating handle (6), that is, the end far from the needle assembly (5), and a pull pellet (63) is fixed on the pull rope (62).

4. An inflated device with improved structure according to claim 1, characterized in that: On the trigger mounting seat (11), a trigger mounting seat cavity (111) with an upward opening and communicated with the receiving cavity of the inflation device main body (1) is formed. The trigger assembly (22), the trigger spring (23) and the actuating member (24) of the trigger (2) are arranged within the trigger mounting seat cavity (111). An external thread (112) is formed on the outer side wall of the trigger mounting seat (11), and an internal thread (211) for screwing and fixing with the external thread (112) is formed on the inner wall at the lower end of the trigger housing (21) of the trigger (2).

5. The inflating device with improved structure according to claim 1, characterized in that: A cylinder mounting seat cavity (121) which is upwardly open and communicates with the accommodation cavity of the inflation device main body (1) is formed on the cylinder mounting seat (12). The inner wall of the cylinder mounting seat cavity (121) is threadedly connected to the mouth of the cylinder (3). A sealing gasket (1211) is provided between the bottom of the cylinder mounting seat cavity (121) and the cylinder (3).

6. The improved inflating device according to claim 1, wherein: The inner housing (4) of the indicator is snapped into the accommodation cavity of the inflation device main body (1) from bottom to top through a set of indicator inner housing snaps (43). A card slot (16) for cooperating with the indicator inner housing snaps (43) is formed on the inner wall of the accommodation cavity of the inflation device main body (1). An inflation device main body indicator window (15) is provided at a position corresponding to the inner housing (4) of the indicator on the inflation device main body (1). A boosting spring (41) is provided between the upper part of the inner housing (4) of the indicator and the inflation device main body (1). A different-color indication area (42) is formed at a position corresponding to the inflation device main body indicator window (15) at the lower end of one side of the inner housing (4) of the indicator. When the inflation device is in an unused state, the different-color indication area (42) is located at the position where the inflation device main body indicator window (15) is located. When the inflation device is in a used state, the different-color indication area (42) is located below the inflation device main body indicator window (15) to show the color of the inner housing (4) body of the indicator, and the two colors are different.

7. The inflating device with improved structure according to claim 1, wherein: A trigger assembly card hole (212) is formed in the middle of the upper end of the trigger housing (21). A connecting rod (221) is formed in the middle of the upper end face of the trigger assembly (22). A connecting card foot (224) is formed at the upper end of the connecting rod (221). The trigger spring (23) is sleeved on the connecting rod (221). The connecting card foot (224) is used for snap connection with the trigger assembly card hole (212). A firing rod (222) extending downward is formed in the middle of the lower end face of the trigger assembly (22). The upper end of the trigger spring (23) abuts against the inner top wall of the trigger housing (21), and the lower end abuts against the trigger assembly (22) and is in a compressed state. A circular boss (223) is formed in the middle of the firing rod (222). The firing member (24) is sleeved on the end of the firing rod (222) and abuts against the boss (223). A circle of limiting card feet (242) is formed at intervals around the firing rod (222) in the middle of the firing member (24). An upwardly open groove (241) is formed at a position between the outer wall of the firing member (24) and the limiting card feet (242). The water-soluble compression sheet (25) is embedded in the groove (241) to keep the limiting card feet (242) close to the firing rod (222) side to prevent the boss (223) from passing through the firing member (24).

8. The improved inflating device according to claim 1, wherein: The water-soluble compression sheet (25) is a ring structure formed by compressing water-soluble powder.

9. The improved inflating device according to claim 1, wherein: The upper end of the lancet assembly (5) is formed with a thimble (51) that penetrates into the gas cylinder mounting seat (12) and abuts against the gas cylinder (3). A lancet assembly sealing ring (52) is sleeved on the outer wall of the lancet assembly (5), and the lancet assembly sealing ring (52) is used to prevent the gas in the gas cylinder (3) from overflowing around the lancet assembly (5).

10. The inflating device with improved structure according to claim 2, characterized in that: The cross-section of the mounting hole (13) is in the shape of the letter "D".

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