CN-224233802-U - Explosion-proof loudspeaker

Abstract

The application provides an explosion-proof horn, and relates to the technical field of horns. The anti-explosion loudspeaker comprises a shell, a voice coil assembly and a rear cover, wherein the shell comprises a first shell, a first cavity for accommodating the voice coil assembly is formed in the first shell, the side face of the voice coil assembly is arranged at intervals with the cavity wall of the first cavity, a protruding piece is arranged at the bottom of the voice coil assembly and is exposed out of the first end of the first shell, the first shell is made of a heat radiation material, the rear cover is reversely buckled on the first shell and forms a second cavity with the first end of the first shell, and the protruding piece is located in the second cavity.

Inventors

• ZHAO MING
• LI XINJIAN
• ZHANG CHANGHUA

Assignees

• 广东保伦电子股份有限公司

Dates

Publication Date

20260512

Application Date

20250430

Claims (10)

1. 1. The utility model provides an explosion-proof loudspeaker which is characterized in that, includes shell, voice coil assembly and back lid, the shell includes first casing, first casing cavity forms the first cavity that holds the voice coil assembly, the side of voice coil assembly and the cavity wall interval setting of first cavity, and the bottom of voice coil assembly is equipped with protruding piece, protruding piece exposes from the first end of first casing, first casing comprises heat dissipation material; the rear cover is reversely buckled on the first shell, a second cavity is formed between the rear cover and the first end of the first shell, and the protruding piece is located in the second cavity.
2. 2. The explosion-proof loudspeaker of claim 1, wherein the first end side of the first shell is provided with explosion-proof external threads, the inner side of the rear cover is provided with explosion-proof internal threads corresponding to the explosion-proof external threads, and the rear cover is buckled on the first shell through the explosion-proof internal threads and the explosion-proof external threads.
3. 3. The explosion-proof horn according to claim 1, wherein the housing includes a second shell connected to the first shell at a second end thereof remote from the rear cover, the second shell has a cylindrical structure, and a diameter of the second shell increases gradually as the second shell is remote from the first shell.
4. 4. The explosion-proof horn according to claim 1, wherein the second end of the first housing is provided with a first through hole and a first protruding portion extending toward the first cavity, the first through hole penetrating the first protruding portion; the voice coil assembly is provided with a second protruding part on one side far away from the rear cover, and the second protruding part is inserted into the first through hole.
5. 5. The explosion-proof horn according to claim 4, further comprising a first press cap disposed in the first through hole, a ventilation piece, wherein the first press cap is sleeved on the top end of the second protruding portion, and the ventilation piece is disposed on a side of the first press cap away from the voice coil assembly.
6. 6. The explosion-proof horn according to claim 4, further comprising a second press cap provided with a cap body and an extension portion, wherein one end of the cap body extends into one end of the first through hole away from the first cavity, the other end of the cap body extends in a direction away from the first cavity, the extension portion is located on one side of the first housing away from the rear cover, the extension portion surrounds the cap body, one side of the extension portion is connected with the cap body, and the other side extends in a direction away from the cap body.
7. 7. The explosion proof horn of claim 6, further comprising a sound guide tube, wherein the cap is hollow to form a second through hole, a first end of the sound guide tube is inserted into the second through hole, a second end of the sound guide tube extends away from the first housing, and a diameter of the second end of the sound guide tube is larger than a diameter of the first end of the sound guide tube.
8. 8. The explosion-proof horn according to claim 6, further comprising a fixing member surrounding the cap body and having one end fixed to a side of the extension portion away from the first housing, and an inner tube hollow and having one end fixed to a side of the fixing member away from the cap body.
9. 9. The explosion-proof horn according to claim 1, further comprising a handle and fixing holes, wherein the fixing holes are symmetrically arranged on two sides of the first shell, and two ends of the handle are arranged on the first shell through the fixing holes.
10. 10. The explosion-proof horn according to claim 9, further comprising an opening and a plug, wherein the opening is communicated with the first cavity, the plug is screwed into the opening, and a second sealing ring is sleeved on the side surface of the plug.

Description

Explosion-proof loudspeaker Technical Field The application relates to the technical field of horns, in particular to an explosion-proof horn. Background Electrical equipment used in some gas explosive, dust and fiber explosive environments (such as coal mines, petrochemical industry, gas stations, natural gas exploitation, drilling platforms, military industry, mines, metal polishing workshops with explosive risks and the like) needs to be subjected to explosion-proof design, otherwise, electric spark, electric arc and other electric fire sources generated by unexpected operation of the equipment can cause explosion to occur, and safety accidents are caused. Thus, the country requires that electrical equipment used in places where flammable and explosive gases, vapors, liquids, etc. are present, which pose a fire or explosion hazard, must meet explosion proof requirements, and that related explosion proof products must be produced after the explosion proof certification is made at a designated detection facility. In order to realize explosion prevention and normal operation of a voice coil assembly, an existing explosion-proof loudspeaker often uses a closed structure to realize isolation between the voice coil assembly and the outside. However, the structure has poor heat dissipation effect, can only work in a small temperature range (such as 0-40 ℃), and limits the application environment of the explosion-proof loudspeaker. Disclosure of utility model The embodiment of the application provides an explosion-proof horn, which can solve the problems that the existing explosion-proof horn has poor heat dissipation effect and can only work in a small temperature range. In order to achieve the object, embodiments of the present application provide the following solutions. According to an aspect of an embodiment of the present application, there is provided an explosion-proof horn including a housing, a voice coil assembly, and a rear cover, the housing including a first case hollow to form a first cavity accommodating the voice coil assembly, a side surface of the voice coil assembly being spaced apart from a cavity wall of the first cavity, and a bottom of the voice coil assembly being provided with a protruding piece exposed from a first end of the first case, the first case being composed of a heat dissipation material; the rear cover is reversely buckled on the first shell, a second cavity is formed between the rear cover and the first end of the first shell, and the protruding piece is located in the second cavity. In one possible implementation manner, the first end side surface of the first shell is provided with an explosion-proof external thread, the inner side of the rear cover is provided with an explosion-proof internal thread corresponding to the explosion-proof external thread, and the rear cover is buckled on the first shell through the explosion-proof internal thread and the explosion-proof external thread. In one possible implementation, the housing includes a second shell connected to the first shell at a second end thereof remote from the rear cover, the second shell being of a cylindrical structure, and the diameter of the second shell gradually increasing as the second shell moves away from the first shell. In one possible implementation manner, the second end of the first housing is provided with a first through hole and a first protruding part extending towards the first cavity, and the first through hole penetrates through the first protruding part; the voice coil assembly is provided with a second protruding part on one side far away from the rear cover, and the second protruding part is inserted into the first through hole. In one possible implementation manner, the voice coil assembly further comprises a first press cap and a ventilation sheet, wherein the first press cap and the ventilation sheet are arranged in the first through hole, the first press cap is sleeved on the top end of the second protruding portion, and the ventilation sheet is arranged on one side, away from the voice coil assembly, of the first press cap. In one possible implementation manner, the novel plastic cap further comprises a second press cap provided with a cap body and an extension portion, one end of the cap body extends into one end of the first through hole away from the first cavity, the other end of the cap body extends away from the first cavity, the extension portion is located on one side of the first shell away from the rear cover, the extension portion surrounds the cap body, one side of the extension portion is connected with the cap body, and the other side of the extension portion extends away from the direction of the cap body. In one possible implementation manner, the device further comprises a sound guide cylinder, the cap body is hollow to form a second through hole, the first end of the sound guide cylinder is inserted into the second through hole, the second end of the sound guide cyli