A structure for exhausting a tear gas bomb

Abstract

The present invention discloses a structure for discharging exhaust gas of a tear gas grenade, which comprises a cartridge case, a primer combustion chamber and a piston. The primer combustion chamber is arranged at the rear end of the cartridge case. A cylindrical inner cavity is arranged inside the cartridge case. The piston is arranged at the rear end of the inner cavity and faces the primer combustion chamber. The inner cavity at the front end of the piston is used for containing tear gas liquid. A front seal is arranged at the front end of the cartridge case, and the diameter of the front seal is smaller than the outer diameter of the piston. An exhaust port is formed on the outer wall of the cartridge case. The exhaust port is communicated with a pre-groove through an exhaust channel. The pre-groove can be communicated with the inner cavity after being broken through by air pressure. The distance between the pre-groove and the front end of the inner cavity is greater than the axial length of the piston. A sound-absorbing and filtering layer is arranged in the exhaust channel. In the structure for discharging exhaust gas of the tear gas grenade in the present invention, the exhaust port is arranged at the rear end of the cartridge case, so that the gas after primer combustion is discharged from the rear end. By arranging the sound-absorbing and filtering layer in the exhaust channel, the gas is filtered and buffered, achieving the purpose of reducing gas smoke and reducing the firing sound.

Description

Technical Field

[0001] The present invention relates to the technical field of tear gas bombs, and particularly to an exhaust structure for a tear gas bomb. Background Art

[0002] Currently, the exhaust method of a tear gas bomb adopts front-end cover exhaust as Figures 1-2 shown. When the primer is fired, it pushes the piston forward. The liquid breaks through the front seal and sprays out due to the pressure. The piston moves forward to the front cavity. The gas is discharged from the gap between the piston and the cavity.

[0003] In the existing tear gas bomb firing and exhaust structure, since it is front-end exhaust, the gas from the primer is discharged from the front, interfering with the user's line of sight, and the sound caused by the discharge has a greater impact on the user and others in the use scenario.

[0004] In summary, the existing exhaust structure of the tear gas bomb has the defects of interfering with the user's line of sight and having a great adverse impact on the use scenario. Summary of the Invention

[0005] The purpose of the present invention is to provide an exhaust structure for a tear gas bomb to solve the problems existing in the above-mentioned prior art. By exhausting from the rear end and filtering and buffering the gas through the structure, the purpose of reducing gas and smoke and reducing the firing sound is achieved.

[0006] To achieve the above purpose, the present invention provides the following solution:

[0007] The present invention provides an exhaust structure for a tear gas bomb, including a cartridge case, a primer combustion chamber, and a piston. The primer combustion chamber is arranged at the rear end of the cartridge case. The cartridge case is internally provided with a cylindrical inner cavity. The piston is arranged at the rear end of the inner cavity and is opposite to the primer combustion chamber. The inner cavity at the front end of the piston is used for containing tear liquid. The front end of the cartridge case is provided with a front seal, and the diameter of the front seal is smaller than the outer diameter of the piston. An exhaust port is opened on the outer wall of the cartridge case. The exhaust port is communicated with a pre-groove through an axially arranged exhaust channel. The pre-groove can be communicated with the inner cavity after being broken through by air pressure. The distance between the pre-groove and the front end of the inner cavity is greater than the axial length of the piston. A sound-absorbing and filtering layer is arranged in the exhaust channel.

[0008] Preferably, the exhaust port is a groove structure arranged at the rear end of the cartridge case.

[0009] Preferably, the exhaust channel is a strip-shaped groove structure with the rear end communicated with the exhaust port and the front end communicated with the pre-groove.

[0010] Preferably, the sound-absorbing and filtering layer is a sponge layer arranged in the exhaust channel.

[0011] Preferably, the pre-groove is opened inward from the exhaust passage, and a thin wall layer is reserved between the bottom of the pre-groove and the inner cavity. After the thin wall layer is broken through, the exhaust passage is communicated with the inner cavity.

[0012] Preferably, the cavity diameter of the primer combustion chamber is smaller than that of the inner cavity.

[0013] The present invention has achieved the following beneficial technical effects compared with the prior art:

[0014] An exhaust structure of a tear gas bomb provided by the present invention is provided with an exhaust port at the rear end of the shell, so that the gas after the primer burns is discharged from the rear end, and a sound-absorbing and filtering layer is arranged in the exhaust passage to filter and buffer the gas, achieving the purpose of reducing gas smoke and reducing the firing sound, making the interference of the gas to the user small, and the adverse impact on the use scenario is also small. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Figure 1 FIG. 18 is a schematic structural diagram of an exhaust structure of a tear gas bomb in the prior art;

[0017] Figure 2 FIG. 22 is a schematic diagram of the gas emission state of an exhaust structure of a tear gas bomb in the prior art;

[0018] Figure 3 FIG. 26 is a schematic structural diagram of an exhaust structure of a tear gas bomb in the present invention;

[0019] Figure 4 FIG. 30 is a schematic diagram of the liquid spraying state of an exhaust structure of a tear gas bomb in the present invention;

[0020] Figure 5 FIG. 34 is a schematic diagram of the gas emission state of an exhaust structure of a tear gas bomb in the present invention;

[0021] In the figure: 1 - shell, 2 - primer combustion chamber, 3 - piston, 4 - inner cavity, 5 - tear gas liquid, 6 - front seal, 7 - exhaust port, 8 - exhaust passage, 9 - pre-groove, 10 - thin wall layer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] The purpose of the present invention is to provide a structure for exhausting tear gas in a tear gas bomb to solve the problems existing in the prior art.

[0024] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] The structure for exhausting tear gas in this embodiment, as Figure 3 shown, includes a cartridge case 1, a primer combustion chamber 2, and a piston 3. The primer combustion chamber 2 is arranged at the rear end of the cartridge case 1. A cylindrical inner cavity 4 is arranged inside the cartridge case 1. The piston 3 is arranged at the rear end of the inner cavity 4 and is opposite to the primer combustion chamber. The inner cavity 4 at the front end of the piston 3 is used to hold the tear liquid 5. A front seal 6 is arranged at the front end of the cartridge case 1, and the diameter of the front seal 6 is smaller than the outer diameter of the piston 3. An exhaust port 7 is opened on the outer wall of the cartridge case 1. The exhaust port 7 is communicated with a pre-groove 9 through an axially arranged exhaust passage 8. The pre-groove 9 can be communicated with the inner cavity 4 after being broken through by air pressure. The distance between the pre-groove 9 and the front end of the inner cavity 4 is greater than the axial length of the piston 3. A sound-absorbing and filtering layer is arranged in the exhaust passage 8, and the sound-absorbing and filtering layer is a sponge layer arranged in the exhaust passage 8.

[0026] In this specific embodiment, the exhaust port 7 is a groove structure arranged at the rear end of the cartridge case 1, and the exhaust passage 8 is a strip-shaped groove structure with the rear end communicating with the exhaust port 7 and the front end communicating with the pre-groove 9. The pre-groove 9 is opened inward from the exhaust passage 8, and a thin wall layer 10 is reserved between the bottom of the pre-groove 9 and the inner cavity 4. After the thin wall layer 10 is broken through, the exhaust passage 8 and the inner cavity 4 are communicated.

[0027] In this specific embodiment, the cavity diameter of the primer combustion chamber 2 is smaller than the cavity diameter of the inner cavity 4.

[0028] The working principle of the structure for exhausting tear gas in the present invention is as follows:

[0029] As Figure 3 shown, when the primer is fired to push the piston 3, the piston 3 moves forward, and the tear liquid 5 is ejected outward due to the pressure and breaks through the front seal. As Figure 4 shown, the piston 3 continuously pushes the tear liquid 5 out of the chamber. As Figure 5As shown, after the piston 3 moves to the front end of the inner cavity 4, due to the accumulation of the gas after the primer combustion in the pipe, the pressure of the gas blows open the reserved thin-walled layer 10, so that the gas passes through the exhaust passage 8 and passes through the sponge layer of the exhaust passage 8 and then is discharged through the exhaust port 7 (the direction of the arrow in each figure is the gas flow direction). After passing through the sponge, the gas is filtered and buffered, achieving the purpose of reducing the gas smoke and reducing the firing sound.

[0030] The present invention uses specific examples to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation on the present invention.

Claims

1. A structure for exhausting a tear gas grenade, comprising a cartridge case, a primer combustion chamber and a piston. The primer combustion chamber is arranged at the rear end of the cartridge case. A cylindrical inner cavity is arranged inside the cartridge case. The piston is arranged at the rear end of the inner cavity and is opposite to the primer combustion chamber. The inner cavity at the front end of the piston is used for containing tear liquid. The front end of the cartridge case is provided with a front seal. It is characterized in that: The diameter of the front seal is smaller than the outer diameter of the piston; an exhaust port is formed in the outer wall of the cartridge case, and the exhaust port communicates with a pre-groove through an axially arranged exhaust channel. The pre-groove can communicate with the inner cavity after being broken by air pressure, and the distance between the pre-groove and the front end of the inner cavity is greater than the axial length of the piston; a sound-absorbing and filtering layer is arranged in the exhaust channel.

2. The tear gas bomb exhaust structure according to claim 1, characterized in that: The exhaust port is a groove structure arranged at the rear end of the cartridge case.

3. The tear gas bomb exhaust structure according to claim 2, characterized in that: The exhaust channel is a strip-shaped groove structure with the rear end communicating with the exhaust port and the front end communicating with the pre-groove.

4. A tear gas bomb exhaust structure according to claim 1, characterized in that: The sound-absorbing and filtering layer is a sponge layer arranged in the exhaust channel.

5. The tear gas bomb exhaust structure according to claim 1, characterized in that: The pre-groove is formed by opening inwards from the exhaust channel, and a thin wall layer is reserved between the groove bottom of the pre-groove and the inner cavity. After the thin wall layer is broken, the exhaust channel and the inner cavity are communicated.

6. The tear gas bomb exhaust structure according to claim 1, characterized in that: The cavity diameter of the primer combustion chamber is smaller than the cavity diameter of the inner cavity.

Images