Leak-proof tear bomb

Abstract

The utility model discloses a leakproof tear bomb which comprises a launch shell, a launch cavity and a tear cavity which are communicated with each other are arranged in the launch shell, a percussion hole and a jet hole are respectively arranged at two ends of the launch shell, an empty shell is accommodated in the launch cavity, the percussion hole is positioned at the end of the launch cavity, and the jet hole is positioned at the end of the tear cavity. Wall breaking cones protruding towards the inside of the lacrimation cavity are further arranged at the spraying holes; a front piston and a rear piston are arranged in the lachrymation cavity, the front piston, the rear piston and the launching shell define a sealing cavity for containing lachrymation media, the front piston is arranged towards the wall breaking cone and provided with a sealing thin film, and when the wall breaking cone punctures the sealing thin film, the sealing cavity is communicated with the spraying hole. The front piston and the rear piston define the sealing cavity for containing the lachrymatory medium, the lachrymatory medium is prevented from leaking at the end of the launching shell, meanwhile, the sharp end of the wall breaking cone is used for puncturing the sealing film to enable the lachrymatory medium to be sprayed out, and it is guaranteed that spraying power of the lachrymatory medium is sufficient.

Description

Technical Field

[0001] This utility model relates to the field of defense device technology, and in particular to a leak-proof tear gas canister. Background Technology

[0002] Tear gas is a defensive device made of chemical substances that emit tear gas or liquid, causing irritation and tearing. Existing leak-proof tear gas has the following defects: (1) The membrane at the launch port is broken by the impact force of the gas or liquid, resulting in a large loss of impact force, a reduced spray speed, and a reduced spray distance. (2) The tear gas or liquid is sprayed directly from the launch port, resulting in a low spray speed and poor stability. (3) The cavity for storing tear gas or liquid is only formed by sealing the end of the launcher, which requires a high degree of sealing between the launcher end cap and the cylinder, making it easy for gas or liquid to leak. (4) The tear gas or liquid usually rushes into the cavity from the front end of the launcher. Because air remains at the bottom of the cavity, the cavity cannot be filled with tear gas liquid, resulting in a weakened impact force. Utility Model Content

[0003] To address the technical problems of insufficient medium sealing effect and reduced spray speed and distance in existing leak-proof tear gas canisters, this invention provides a leak-proof tear gas canister to solve the above problems.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a leak-proof tear gas grenade, including a firing shell, wherein the firing shell has a firing chamber and a tear gas chamber that are interconnected inside, and the firing shell has a firing hole and a spray hole at its two ends respectively. The firing chamber contains a blank shell, the firing hole is located at the end of the firing chamber, the spray hole is located at the end of the tear gas chamber, and a wall-breaking cone protruding into the tear gas chamber is also provided at the spray hole; the tear gas chamber has a front piston and a rear piston, and the front piston and the rear piston and the firing shell form a sealed cavity for containing the tear gas medium. The front piston is positioned towards the wall-breaking cone and is provided with a sealing film. When the wall-breaking cone punctures the sealing film, the sealed cavity communicates with the spray hole.

[0005] In an optional embodiment of this utility model, the outer peripheral surface of the wall-breaking cone has a plurality of lateral holes communicating with the injection holes.

[0006] In an optional embodiment of this utility model, the outer peripheral surfaces of the front piston and the rear piston are provided with sealing grooves, the inner wall of the launch housing has a limiting groove corresponding to the sealing groove, and a sealing ring is filled between the sealing groove and the limiting groove.

[0007] In an optional embodiment of this utility model, the depth of the limiting groove is less than one-quarter of the diameter of the sealing ring.

[0008] In an optional embodiment of this utility model, the front piston includes a front guide slide and a sealing ring. The front guide slide has an annular structure, and the front end of the front guide slide is provided with a concave annular groove. A sealing film covers the front end of the front guide slide, and the sealing ring is located inside the annular groove and pressed outside the sealing film.

[0009] In an optional embodiment of this utility model, the rear piston includes a rear guide slide and a plug, the rear guide slide having an axially penetrating pressure discharge hole, and the plug blocking the pressure discharge hole.

[0010] In an optional embodiment of this utility model, the sealing film is an aluminum film.

[0011] In an optional embodiment of this utility model, the firing shell includes a front end cover, a cylindrical body, a connecting seat, and a base that are threaded together from front to back. The spray hole is located at the center of the front end cover, the firing hole is located at the center of the base, the firing chamber is located inside the connecting seat, and the tear gas chamber is located inside the cylindrical body.

[0012] In an optional embodiment of this utility model, the wall-breaking cone is integrally formed on the front end cap.

[0013] In an optional embodiment of this utility model, the cylinder is a cylindrical structure.

[0014] The beneficial effects of this utility model are:

[0015] (1) The leak-proof tear gas grenade of this utility model uses the front piston and the rear piston to form a sealed cavity to contain the tear gas medium, so as to avoid the tear gas medium from leaking at the end of the launch shell. At the same time, the tip of the wall-breaking cone pierces the sealing film to make the tear gas medium spray out, ensuring that the spraying power of the tear gas medium is sufficient.

[0016] (2) The present invention limits the sealing ring by limiting the groove inside the launch housing, so that the front piston and the rear piston remain stationary when not subjected to external force and will not move inside the launch housing, thus ensuring the sealing effect.

[0017] (3) The present invention has multiple side holes on the wall-breaking cone. The tear gas medium flows from multiple side holes to the spray hole. Compared with directly entering the spray hole, it can increase the flow velocity in the spray hole and make the flow velocity more stable.

[0018] (4) The present invention provides a pressure relief hole on the rear piston. When the tear gas medium is injected into the sealing cavity, the pressure relief hole can be opened and the tear gas medium can be added from the pressure relief hole to ensure that the tear gas medium can fill the sealing cavity. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a front view of a specific embodiment of the leak-proof tear gas canister described in this utility model;

[0021] Figure 2 It corresponds to Example 1 Figure 1 Sectional view along axis AA;

[0022] Figure 3 It corresponds to Example 2 Figure 1 AA-direction sectional view

[0023] Figure 4 This is a three-dimensional view of the integrated structure of the front end cover and the wall-breaking cone in this utility model.

[0024] In the diagram, 1. Launch casing, 101. Front end cover, 102. Cylinder, 103. Connecting seat, 104. Base, 2. Launch chamber, 3. Tear gas chamber, 4. Firing port, 5. Spray port, 6. Blank shell, 7. Wall-breaking cone, 701. Lateral hole, 8. Front piston, 801. Front guide slide, 802. Sealing pressure ring, 803. Annular groove, 9. Rear piston, 901. Rear guide slide, 902. Plug, 903. Pressure relief hole, 10. Sealing chamber, 11. Tear gas medium, 12. Sealing membrane, 13. Sealing groove, 14. Sealing ring, 15. Limiting groove. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, a leak-proof tear gas grenade includes a firing casing 1. The firing casing 1 contains a firing chamber 2 and a tear gas chamber 3 that are interconnected. The firing casing 1 has a firing port 4 and a spray port 5 at its two ends. The firing chamber 2 contains a blank projectile 6. The firing port 4 is located at the end of the firing chamber 2, and the spray port 5 is located at the end of the tear gas chamber 3. A wall-breaking cone 7 protruding into the tear gas chamber 3 is also provided at the spray port 5. The tear gas chamber 3 contains a front piston 8 and a rear piston 9. The front piston 8, rear piston 9, and firing casing 1 form a sealed cavity 10 for containing tear gas medium 11. The front piston 8 faces the wall-breaking cone 7 and has a sealing film 12. When the wall-breaking cone 7 punctures the sealing film 12, the sealed cavity 10 communicates with the spray port 5. The tear gas chamber 3 is the space for the movement of the tear gas medium 11, and the firing chamber 2 is the space for the movement of the blank projectile 6. After the leak-proof tear gas grenade is activated, the sealed cavity 10 moves within the tear gas chamber 3.

[0028] When the leak-proof tear gas canister needs to be activated, the blank shell 6 is ignited at the firing port 4. After the blank shell 6 explodes, it impacts the rear piston 9, causing the rear piston 9 to move forward. Since the sealed cavity 10 is filled with tear gas medium 11, the front piston 8 also moves forward until the front piston 8 hits the tip of the wall-breaking cone 7, causing the sealing film 12 on the surface of the front piston 8 to rupture. The rear piston 9 continues to move forward, and the tear gas medium 11 is squeezed by the rear piston 9 and sprayed out from the spray port 5 through the wall-breaking cone 7.

[0029] The wall-breaking cone 7 has a conical structure. Those skilled in the art should understand that the wall-breaking cone 7 must have holes to allow the injection hole 5 to communicate with the emission chamber 2. For example, a hole could be provided at the tip of the wall-breaking cone 7, but this would reduce the pressure of the wall-breaking cone 7 on the sealing membrane 12. In this embodiment, several lateral holes 701 communicating with the injection hole 5 are provided on the outer circumferential surface of the wall-breaking cone 7. Figure 4 As shown, the outer circumferential surface of the wall-breaking cone 7 is evenly distributed with three side holes 701. When the sealing film 12 is punctured, the tear gas medium 11 will enter the central spray hole 5 through the three side holes 701 at the same time. Therefore, the flow velocity at the spray hole 5 will be greatly increased. Moreover, since the fluid is diverted by the three side holes 701, turbulence can be avoided, and the fluid flow velocity in the spray hole 5 is more stable.

[0030] The front piston 8 may include, but is not limited to, a front guide slide 801 and a sealing ring 802. The front guide slide 801 has an annular structure and a concave annular groove 803 at its front end. The sealing film 12 covers the front end of the front guide slide 801. The sealing ring 802 is located inside the annular groove 803 and presses against the sealing film 12. The concave annular groove 803 provides installation space for the sealing film 12 and the sealing ring 802. The circumferential surface of the annular groove 803 is interference-fitted with the sealing ring 802, pressing the sealing film 12 between the sealing ring 802 and the end face of the annular groove 803.

[0031] The rear piston 9 can be an integral cylindrical structure used to seal the rear end of the sealing cavity 10, and the sealing film 12 can be an aluminum film.

[0032] For ease of assembly, the firing casing 1 preferably adopts a split structure, including a front cover 101, a cylinder 102, a connecting seat 103, and a base 104 connected sequentially from front to back by threads. The injection port 5 is located at the center of the front cover 101, the firing port 4 is located at the center of the base 104, the firing chamber 2 is located inside the connecting seat 103, and the tear gas chamber 3 is located inside the cylinder 102. The overall shape of the firing casing 1 is cylindrical, and the cylinder 102 is also cylindrical, as shown in the figure. The cylinder 102 is assembled with the connecting seat 103. The rear piston 9, the front piston 8, and the tear gas medium 11 are loaded into the cylinder 102 from the front end, and the blank projectile 6 is loaded into the connecting seat 103 from the rear end.

[0033] The wall-breaking cone 7 can be integrally molded onto the front end cap 101.

[0034] Example 2

[0035] The difference between this embodiment and Embodiment 1 lies in the structure of the rear piston 9. In Embodiment 1, the tear gas medium 11 can only be filled into the sealed cavity 10 from the front end of the cylinder 102. However, when the tear gas medium 11 is a liquid, such as pepper spray, gas will remain between the tear gas medium 11 and the rear piston 9, preventing the liquid from filling the entire sealed cavity 10. Therefore, this embodiment adopts the following rear piston 9 structure: Figure 3 As shown, the rear piston 9 includes a rear guide slide 901 and a plug 902. The rear guide slide 901 has an axially penetrating pressure relief hole 903, and the plug 902 is inserted into the pressure relief hole 903. The plug 902 can be a connecting screw. When filling the tear gas medium 11, some liquid can be pre-filled from the front end first, then the sealing membrane 12 can be installed to seal the front piston 8, and then the pressure relief hole 903 can be opened to continue flushing liquid from the rear end. This can completely expel the air in the sealing cavity 10, allowing the tear gas medium 11 to completely fill the sealing cavity 10.

[0036] Example 3

[0037] like Figure 2 and Figure 3 As shown, the outer circumferential surfaces of the front piston 8 and the rear piston 9 are typically provided with sealing grooves 13 for mounting sealing rings 14, ensuring a seal at the contact surfaces of the front piston 8 and the launch housing 1, and the rear piston 9 and the launch housing 1. Since the sealing cavity 10 is filled with fluid, to prevent the front piston 8 and the rear piston 9 from moving along the launch housing 1 without external force, this embodiment provides a limiting groove 15 corresponding to the sealing groove 13 on the inner wall of the launch housing 1. A sealing ring 14 is filled between the sealing groove 13 and the limiting groove 15. The limiting groove 15 has a small depth, which both prevents the front piston 8 and the rear piston 9 from moving independently and allows them to move along the launch housing 1 when subjected to impact. In a preferred embodiment, the depth of the limiting groove 15 is less than one-quarter of the diameter of the sealing ring 14.

[0038] In the description of this utility model, it should be understood that the terms "center", "front", "rear", "inner", "outer", "axial", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0040] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A leak-proof tear gas canister, characterized in that: The device includes a firing shell (1), which has a firing chamber (2) and a tear gas chamber (3) that are connected to each other. The firing shell (1) has a firing hole (4) and a spray hole (5) at its two ends. The firing chamber (2) contains an empty shell (6). The firing hole (4) is located at the end of the firing chamber (2), and the spray hole (5) is located at the end of the tear gas chamber (3). The spray hole (5) also has a wall-breaking cone (7) that protrudes into the tear gas chamber (3). The tear gas chamber (3) is provided with a front piston (8) and a rear piston (9). The front piston (8), the rear piston (9) and the firing shell (1) form a sealed chamber (10) for accommodating the tear gas medium (11). The front piston (8) is positioned towards the wall-breaking cone (7) and is provided with a sealing film (12). When the wall-breaking cone (7) punctures the sealing film (12), the sealed chamber (10) communicates with the spray hole (5).

2. The leak-proof tear gas canister according to claim 1, characterized in that: The outer peripheral surface of the wall-breaking cone (7) has several lateral holes (701) that communicate with the injection hole (5).

3. The leak-proof tear gas canister according to claim 1, characterized in that: The outer circumferential surfaces of the front piston (8) and the rear piston (9) are provided with sealing grooves (13), and the inner wall of the launch housing (1) has a limiting groove (15) corresponding to the sealing groove (13). A sealing ring (14) is filled between the sealing groove (13) and the limiting groove (15).

4. The leak-proof tear gas canister according to claim 3, characterized in that: The depth of the limiting groove (15) is less than one-quarter of the diameter of the sealing ring (14).

5. The leak-proof tear gas canister according to claim 1, characterized in that: The front piston (8) includes a front guide slide (801) and a sealing ring (802). The front guide slide (801) has an annular structure. The front end of the front guide slide (801) is provided with an indented annular groove (803). The sealing film (12) covers the front end of the front guide slide (801). The sealing ring (802) is located in the annular groove (803) and pressed against the sealing film (12).

6. The leak-proof tear gas canister according to claim 1, characterized in that: The rear piston (9) includes a rear guide slide (901) and a plug (902). The rear guide slide (901) has an axially penetrating pressure relief hole (903), and the plug (902) is plugged in the pressure relief hole (903).

7. The leak-proof tear gas canister according to claim 1, characterized in that: The sealing film (12) is an aluminum film.

8. The leak-proof tear gas canister according to claim 1, characterized in that: The firing shell (1) includes a front cover (101), a cylinder (102), a connecting seat (103), and a base (104) that are threaded together from front to back. The spray hole (5) is located at the center of the front cover (101), the firing hole (4) is located at the center of the base (104), the firing chamber (2) is located inside the connecting seat (103), and the tear gas chamber (3) is located inside the cylinder (102).

9. The leak-proof tear gas canister according to claim 8, characterized in that: The wall-breaking cone (7) is integrally formed on the front end cap (101).

10. The leak-proof tear gas canister according to claim 8, characterized in that: The cylinder (102) has a cylindrical structure.

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