Tear bomb of tear launcher for bank robbing prevention

Abstract

The invention relates to a tear bomb of a tear launcher for bank robbery prevention, which comprises a cylindrical bomb shell, the front end of the bomb shell is provided with an inward-retracted annular edge, the rear end of the bomb shell is sealed with a rear cover, an ammunition structure is slidably arranged in the bomb shell, the ammunition structure comprises a cylindrical base, the outer peripheral surface of the cylindrical base is in sliding fit with the bomb shell, and the cylindrical base is provided with an opening. A tear material column is arranged in the cylindrical base, an opening is formed in the front end of the cylindrical base, a propelling powder layer is arranged at the bottom of the cartridge case, an ignition device is embedded in the propelling powder layer, an electric wire is connected to a positive electrode of the ignition device, a negative electrode of the ignition device is electrically connected with the rear cover, and the inner diameter of the annular edge is smaller than the outer diameter of the cylindrical base. When the tear bomb is launched, the cylindrical base of the ammunition structure of the tear bomb cannot be ejected out, and the risk of hitting a human body is avoided.

Description

Technical Field

[0001] This invention relates to a tear gas canister, and more particularly to a tear gas canister launcher for bank robbery prevention, belonging to the field of riot control and riot prevention technology. Background Technology

[0002] Tear gas is a non-lethal technological product designed for riot control and riot prevention, integrating chemical, pharmaceutical, ammunition engineering, and public safety strategies. It is typically launched from a tear gas launcher, releasing the tear gas agent contained within the canister. This agent disperses crowds, controls riots, or subdues targets by irritating sensitive areas such as the eyes, respiratory tract, and skin.

[0003] Chinese patent application number 201921627263.X discloses a handheld long-range biological tear gas launcher. This launcher includes a housing, a cartridge ejection device, tear gas grenades, and a battery. The cartridge ejection device, tear gas grenades, and battery are housed within the housing. The cartridge ejection device comprises a trigger, a trigger slide connected to one end of the trigger, a trigger switch corresponding to the trigger and located at the other end of the trigger slide, a projectile ejection mechanism located on both sides of the trigger switch at the bottom of the cartridge slot, and a safety switch. This launcher is suitable for single-person handheld use by an officer. Its biological tear gas grenade ejection structure is well-designed, allowing for the continuous firing of two grenades over a long distance. The oily granular agent inside the biological tear gas grenades exhibits strong directional propulsion and wind resistance, minimizing the risk of injury. It also features an LED high-intensity flashlight function. To use, place two tear gas canisters 4 into the cartridge slot 1-1. The rear end of each tear gas canister 4 presses against the ejection spring 3-4-4 and contact 3-4-3, putting the tear gas canister 4 in the ready-to-fire state. Rotate the trouser clip 8 to a 90-degree position, exposing the safety switch 3-5 located behind the trouser clip 8. Open the safety switch 3-5, energizing the trigger switch 3-3. When tear gas needs to be fired, hold the assembled casing 1 and top cover 2, and use your index finger to move the firing trigger 3-1 on the cartridge ejection device 3 backward. At this time, the trigger lever 3-1-2 (part A) on the firing trigger 3-1 will move forward through the downward protrusion 3-1-4 in the labyrinth groove 3-2-3 on the firing trigger slide 3-2 (and elastically deform outward). The first triggering of the trigger point a on the trigger switch 3-3 energizes the contact 3-4-3 on the back of the corresponding tear gas grenade 4. The 3.6V DC primer layer 4-8 on that side of the tear gas grenade 4 triggers the ignition device 4-6, and the propellant layer 4-7 explodes, pushing the propellant rubber plug 4-5 so that the oily granular propellant in the propellant chamber 4-2 breaks through the front seal. Layer 4-3 is sprayed from the agent nozzle 4-4; after the first trigger, the index finger is released (the trigger body 3-1-1 returns to its original position through the return spring 3-1-3), at which time the trigger lever 3-1-2 will elastically deform inward, causing the lower protrusion 3-1-4 to return to the middle position B on the maze slide 3-2-3. The second time, the index finger is used to move the firing trigger 3-1 on the cartridge ejection device 3 backward. At this time, the trigger lever 3-1-2 (part B) on the firing trigger 3-1 will move forward through the lower protrusion 3-1-4 under the limitation of the maze slide 3-2-3, triggering another trigger point b on the trigger switch 3-3 for the second time. The tear gas grenade 4 detonates in the same way as above, thus completing two tear gas grenade launches.

[0004] When this tear gas launcher is fired, the explosive charge layer 4-7 pushes the propellant plug 4-5, causing it to force the oily granular propellant in the propellant chamber 4-2 through the front sealing layer 4-3 and out of the propellant nozzle 4-4. However, the propellant plug 4-5 is soft, resulting in poor guidance and potentially missing the target. Furthermore, the significant friction between the propellant plug 4-5 and the inner wall of the cylindrical object 4-1 during ejection from the propellant nozzle 4-4 affects the range and can easily damage the plug. To improve range and guidance accuracy, some tear gas grenades replace the propellant plug with a metal mounting base. However, the friction between the metal mounting base and the inner wall of the cylindrical object 4-1 is lower, resulting in a high launch velocity. If it directly hits vulnerable areas such as the head, it can cause serious injury. Summary of the Invention

[0005] The purpose of this invention is to provide a tear gas launcher for bank anti-robbery purposes, in order to solve the above-mentioned problems existing in the prior art.

[0006] To solve the above problems, the tear gas canister for the bank anti-robbery tear gas launcher involved in this invention adopts the following technical solution: A tear gas launcher for bank robbery prevention includes a cartridge case, which is cylindrical with an inwardly tapering annular rim at the front end and a rear cover at the rear end. An ammunition structure is slidably disposed within the cartridge case. The ammunition structure includes a cylindrical base, the outer circumference of which slides into the cartridge case. A column of tear gas material is disposed within the cylindrical base, which has an opening at the front end. A propellant layer is disposed at the bottom of the cartridge case, and an ignition device is embedded within the propellant layer. An electrical wire is connected to the positive terminal of the ignition device, and the negative terminal is electrically connected to the rear cover. The inner diameter of the annular rim is smaller than the outer diameter of the cylindrical base.

[0007] The rear cover is stepped and shaft-shaped, with the small-diameter section of the rear cover being sealed and inserted into the rear port of the cartridge case.

[0008] The outer periphery of the small-diameter section of the back cover and the stepped surface of the back cover are provided with communicating grooves, and the wires are arranged in the grooves.

[0009] The wire is formed from a metal strip.

[0010] The rear end of the cylindrical base is closed.

[0011] The front end of the tear gas material column extends out of the cylindrical base.

[0012] The rear end face of the back cover is provided with a protrusion for electrical connection.

[0013] The cartridge case of this invention has an inwardly tapering annular rim at its front end. An ammunition structure is slidably disposed within the cartridge case. The ammunition structure includes a cylindrical base, the outer circumferential surface of which slides into the cartridge case. A column of tear gas material is disposed within the cylindrical base. The front end of the cylindrical base is open, and a propellant layer is disposed at the bottom of the cartridge case. An ignition device is embedded within the propellant layer. The inner diameter of the annular rim is smaller than the outer diameter of the cylindrical base. When the ignition device is triggered, it pushes the cylindrical base of the ammunition structure and the tear gas material column within the cylindrical base toward the front end of the cartridge case. During this process, the cylindrical base is blocked by the annular rim of the cartridge case and remains inside, while the tear gas material column passes through the annular rim and is ejected outward to exert its effect. When the tear gas grenade of this invention is fired, the cylindrical base of its ammunition structure is not ejected, thus eliminating the risk of hitting a person. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly described below: Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention; Figure 2 for Figure 1 Another structural diagram from a different perspective; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 1 A sectional view of the main view; Figure 5 for Figure 4 A magnified view of a section at point B in the middle; Figure 6 for Figure 1 A schematic diagram of the ammunition structure.

[0015] The diagram is labeled as follows: 1. cartridge case, 2. ring edge, 3. rear cover, 4. ammunition structure, 5. cylindrical base, 6. tear gas material column, 7. propellant layer, 8. ignition device, 9. wire, 10. protrusion. Detailed Implementation

[0016] To make the technical objectives, technical solutions, and beneficial effects of the present invention clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention; that is, the described embodiments are merely some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Specific embodiments of the tear gas canisters used in the bank anti-robbery launcher involved in this invention are as follows: Figures 1-6 The cartridge case 1 is cylindrical with an opening at its front end and an inwardly tapering annular rim 2 at the opening. A rear cover 3 is sealed at the rear end of the cartridge case 1. An ammunition structure 4 is slidably disposed inside the cartridge case 1. The ammunition structure 4 has a cylindrical base 5, the outer circumferential surface of which slides in conjunction with the inner wall of the cartridge case 1. A tear gas material column 6 is disposed inside the cylindrical base 5. The front end of the cylindrical base 5 is open. A propellant layer 7 is disposed at the bottom of the cartridge case 1. An ignition device 8 is embedded in the propellant layer 7. An electric wire 9 is connected to the positive terminal of the ignition device 8, and the other end of the electric wire 9 extends outside the cartridge case 1. The negative terminal of the ignition device 8 is electrically connected to the rear cover 3. The inner diameter of the annular rim 2 is smaller than the outer diameter of the cylindrical base 5.

[0018] The tear gas canister of this invention can be used in conjunction with the handheld long-range biological tear gas launcher of Chinese Patent Application No. 201921627263.X. The handheld long-range biological tear gas launcher is not part of the structure of this invention and needs to be equipped separately for subsequent use. In use, the original tear gas canister is removed, and the tear gas canister of this invention is placed in the magazine of the handheld long-range biological tear gas launcher. When firing the tear gas canister, activating the handheld long-range biological tear gas launcher connects the wire 9 to the rear cover 3, thereby connecting the positive and negative terminals of the ignition device 8, triggering the ignition device 8. After the ignition device 8 is triggered, the propellant layer 7 explodes instantaneously, giving the ammunition structure 4 an impact force towards the front opening of the cartridge case 1, causing the ammunition structure 4 to move towards the front opening of the cartridge case 1. Since the inner diameter of the annular edge 2 is smaller than the outer diameter of the cylindrical base 5, the cylindrical base 5 of the ammunition structure 4 is blocked by the annular edge 2 of the cartridge case 1 and remains in the cartridge case 1. The tear gas material column 6 of the ammunition structure 4 is ejected outward through the annular edge 2 of the cartridge case 1 under the action of inertia and thus plays its role.

[0019] Specifically, the rear cover 3 is a stepped shaft shape, and the small-diameter section of the rear cover 3 is sealed and inserted into the rear port of the cartridge case 1. The rear cover 3 is used to seal the propellant layer 7 and the ignition device 8 between the rear end of the cartridge case 1 and the ammunition structure 4. When the ignition device 8 is triggered, the propellant layer 7 explodes instantaneously, and the rear cover 3 provides a point of force for the impact force generated by the explosion from the rear end, so that the impact force propels the ammunition structure 4 forward.

[0020] Specifically, the outer periphery of the small diameter section of the rear cover 3 and the stepped surface of the rear cover 3 are provided with communicating grooves. The wire 9 is placed in the groove, and the other end of the wire 9 extends out of the cartridge case 1 through the port of the groove, so that the positive electrode of the ignition device 8 can be led out of the cartridge case 1.

[0021] Specifically, wire 9 is made of metal strip. Wire 9 is designed to be electrically connected to a handheld long-range biological tear gas launcher that will be used later.

[0022] Specifically, the rear end of the cylindrical base 5 is closed, and the cylindrical base 5 is made of metal. The propellant layer 7 is sealed between the rear end of the cartridge case 1 and the closed rear end of the cylindrical base 5 of the ammunition structure 4. During firing, the impact force generated by the instantaneous explosion of the propellant layer 7 pushes the rear end of the cylindrical base 5, thereby causing the cylindrical base 5 and the tear gas material column 6 therein to move towards the front end of the cartridge case 1. The outer peripheral surface of the cylindrical base 5 slides against the inner wall of the cartridge case 1, resulting in better guidance, and the friction between the cylindrical base 5 and the inner wall of the cartridge case 1 is small, making it less prone to wear.

[0023] Specifically, the front end of the tear gas material column 6 extends out of the cylindrical base 5. This can be understood as the rear end of the tear gas material column 6 being inserted inside the cylindrical base 5, while its front end extends out of the cylindrical base 5 through the front opening. Thus, during firing, the tear gas material column 6 is guided more accurately by the cylindrical base 5, and the contact area between the tear gas material column 6 and the cylindrical base 5 is reduced, thereby reducing the friction between them. This facilitates the reduction of obstruction to the tear gas material column 6 when the cylindrical base 5 of the ammunition structure 4 is blocked by the annular edge 2 of the cartridge case 1 and remains inside the cartridge case 1. This allows the tear gas material column 6 to be ejected outwards at a higher speed through the annular edge 2 of the cartridge case 1 under inertia; the higher ejection speed allows the tear gas material column 6 to be ejected further, increasing the range.

[0024] Specifically, the rear end face of the back cover 3 has a protrusion 10 for electrical connection. The protrusion 10 facilitates electrical connection with a handheld long-range biological tear gas launcher that is subsequently equipped for use.

[0025] In the above embodiment, the rear cover is stepped shaft-shaped, and the small diameter section of the rear cover is sealed and inserted into the rear port of the cartridge case. This is an optimized technical solution. In other embodiments, the rear cover can also be a circular plate that is sealed and fixed to the rear end of the cartridge case.

[0026] In the above embodiments, the rear end of the cylindrical base is closed, which is an optimized technical solution. In other embodiments, the rear end of the cylindrical base can also be open.

[0027] In the above embodiment, the front end of the tear gas material column extends out of the cylindrical base, which is an optimized technical solution. In other embodiments, the tear gas material column can also be set in the cylindrical base as a whole.

[0028] In the above embodiment, a protrusion for electrical connection is provided on the rear end face of the back cover. This is an optimized technical solution. In other embodiments, the protrusion can be replaced with a metal sheet embedded in the rear end face of the back cover.

[0029] Finally, it should be noted that the above embodiments are only for illustration and not for limiting the technical solutions of the present invention. Any equivalent substitutions, modifications or partial substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A tear gas canister for use in a bank anti-robbery tear gas launcher, characterized in that, The cartridge case is cylindrical with an inwardly tapering annular rim at the front end and a rear cover at the rear end. An ammunition structure is slidably disposed inside the cartridge case. The ammunition structure includes a cylindrical base, the outer circumference of which slides into the cartridge case. A column of tear gas material is disposed inside the cylindrical base. The front end of the cylindrical base is open. A propellant layer is disposed at the bottom of the cartridge case. An ignition device is embedded in the propellant layer. An electrical wire is connected to the positive terminal of the ignition device, and the negative terminal of the ignition device is electrically connected to the rear cover. The inner diameter of the annular rim is smaller than the outer diameter of the cylindrical base.

2. The tear gas canister for bank anti-robbery tear gas launcher according to claim 1, characterized in that, The rear cover is stepped and shaft-shaped, with the small-diameter section of the rear cover being sealed and inserted into the rear port of the cartridge case.

3. The tear gas canister for bank anti-robbery launchers according to claim 2, characterized in that, The outer periphery of the small-diameter section of the back cover and the stepped surface of the back cover are provided with communicating grooves, and the wires are arranged in the grooves.

4. The tear gas canister for bank anti-robbery tear gas launcher according to claim 3, characterized in that, The wire is formed from a metal strip.

5. The tear gas canister for bank anti-robbery tear gas launcher according to claim 4, characterized in that, The rear end of the cylindrical base is closed.

6. The tear gas canister for bank anti-robbery tear gas launcher according to any one of claims 1-5, characterized in that, The front end of the tear gas material column extends out of the cylindrical base.

7. The tear gas canister for bank anti-robbery tear gas launcher according to claim 6, characterized in that, The rear end face of the back cover is provided with a protrusion for electrical connection.

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