Explosion-proof loudspeaker

Abstract

The utility model provides an explosion-proof loudspeaker, and relates to the technical field of loudspeakers. The explosion-proof loudspeaker comprises a shell, a voice coil assembly and a rear cover, the shell comprises a first shell body, the first shell body is hollow to form a first cavity for containing the voice coil assembly, the side face of the voice coil assembly and the cavity wall of the first cavity are arranged in a spaced mode, a protruding piece is arranged at the bottom of the voice coil assembly, and the protruding piece is exposed out of the first end of the first shell body; the first shell is made of a heat dissipation material; the rear cover is inversely buckled on the first shell, a second cavity is formed by the rear cover and the first end of the first shell, and the protruding piece is located in the second cavity. According to the embodiment of the invention, the heat dissipation efficiency of the explosion-proof loudspeaker can be improved, the isolation effect is improved through the first shell and the rear cover, the influence of a low-temperature environment is effectively reduced, and the environment adaptability of the explosion-proof loudspeaker is enhanced.

Description

Technical Field

[0001] This application relates to the field of loudspeaker technology, and more specifically, to an explosion-proof loudspeaker. Background Technology

[0002] Electrical equipment used in environments with explosive gases, dust, and fibers (such as coal mines, petrochemical plants, gas stations, natural gas extraction, drilling platforms, military facilities, mines, and metal polishing workshops with explosive hazards) requires explosion-proof design. Otherwise, accidental electrical sparks or arcs generated during equipment operation could lead to explosions and safety accidents. Therefore, the state requires that electrical equipment used in locations with flammable and explosive gases, vapors, liquids, or other substances that pose a fire or explosion hazard must meet explosion-proof requirements, and that related explosion-proof products must obtain explosion-proof certificates from designated testing institutions before they can be manufactured.

[0003] To achieve explosion protection and ensure the normal operation of the voice coil assembly, existing explosion-proof loudspeakers often use a sealed structure to isolate the voice coil assembly from the external environment. However, this structure has poor heat dissipation and can only operate within a small temperature range (such as 0 to 40 degrees Celsius), limiting the application environment of explosion-proof loudspeakers. Utility Model Content

[0004] This application provides an explosion-proof speaker that solves the problem of poor heat dissipation in existing explosion-proof speakers, which can only operate within a small temperature range. To achieve this objective, this application provides the following solutions.

[0005] According to one aspect of the embodiments of this application, an explosion-proof speaker is provided, including a housing, a voice coil assembly, and a rear cover. The housing includes a first shell, the first shell being hollow to form a first cavity for accommodating the voice coil assembly. The side of the voice coil assembly is spaced apart from the cavity wall of the first cavity, and the bottom of the voice coil assembly is provided with a protrusion that protrudes from a first end of the first shell. The first shell is made of a heat-dissipating material.

[0006] The rear cover is inverted and placed on the first housing, forming a second cavity with the first end of the first housing, and the protrusion is located in the second cavity.

[0007] In one possible implementation, the first end side of the first housing is provided with an explosion-proof external thread, and the inner side of the rear cover is provided with an explosion-proof internal thread corresponding to the explosion-proof external thread. The rear cover is fastened to the first housing through the explosion-proof internal thread and the explosion-proof external thread.

[0008] In one possible implementation, the outer casing includes a second housing connected to a second end of the first housing away from the rear cover. The second housing has a cylindrical structure, and its diameter gradually increases as it moves further away from the first housing.

[0009] In one possible implementation, the second end of the first housing is provided with a first through hole and a first protrusion extending into the first cavity, the first through hole penetrating the first protrusion;

[0010] The voice coil assembly has a second protrusion on the side away from the rear cover, and the second protrusion is inserted into the first through hole.

[0011] In one possible implementation, a first pressure cap and a vent plate are also provided in the first through hole. The first pressure cap is sleeved on the top of the second protrusion, and the vent plate is provided on the side of the first pressure cap away from the voice coil assembly.

[0012] In one possible implementation, a second pressure cap with a cap body and an extension is further included. One end of the cap body extends into the end of the first through hole away from the first cavity, and the other end of the cap body extends away from the first cavity. The extension is located on the side of the first housing away from the back cover. The extension surrounds the cap body, and one side of the extension is connected to the cap body, while the other side extends away from the cap body.

[0013] In one possible implementation, a sound guide tube is also included, wherein the cap body is hollow to form a second through hole, the first end of the sound guide tube is inserted into the second through hole, the second end of the sound guide tube extends away from the first shell, and the diameter of the second end of the sound guide tube is larger than the diameter of the first end of the sound guide tube.

[0014] In one possible implementation, a fastener and an inner tube are also included, the fastener surrounding the cap body and one end of the fastener being fixed to the side of the extension away from the first housing, and the inner tube being hollow and one end of the inner tube being fixed to the fastener on the side away from the cap body.

[0015] In one possible implementation, the device further includes a handle and mounting holes, the mounting holes being symmetrically arranged on both sides of the first housing, and the two ends of the handle being attached to the first housing through the mounting holes.

[0016] In one possible implementation, the system further includes an opening and a plug, wherein the opening communicates with the first cavity, the plug is screwed into the opening, and a second sealing ring is fitted on the side of the plug.

[0017] The beneficial effects of the technical solutions provided in this application are:

[0018] The explosion-proof speaker housing provided in this application includes a first housing, which is hollow to form a first cavity for accommodating a voice coil assembly. The side of the voice coil assembly is spaced apart from the cavity wall of the first cavity, and the protrusion of the voice coil assembly protrudes from the first end of the first housing. The first housing is made of a heat-dissipating material. A rear cover is inverted on the first housing and forms a second cavity with the first end of the first housing. The protrusion is located in the second cavity. The embodiments of this application can improve the heat dissipation efficiency of the explosion-proof speaker and enhance the isolation effect through the first housing and the rear cover, effectively reducing the impact of low-temperature environments and enhancing the environmental adaptability of the explosion-proof speaker. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below.

[0020] Figure 1 A cross-sectional view of an explosion-proof horn provided in an embodiment of this application;

[0021] Figure 2 A side view of an explosion-proof horn provided in an embodiment of this application;

[0022] Figure 3 This is a rear view of the explosion-proof horn provided in an embodiment of this application. Attached image description:

[0024] 1. Second housing; 2. Inner cylinder; 3. Sound guide tube; 4. Second pressure cap; 5. First pressure cap; 6. Voice coil assembly; 7. First housing; 8. First sealing ring; 9. Rear cover; 10. Second sealing ring; 11. Plug; 12. First screw; 13. Handle. Detailed Implementation

[0025] The embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the embodiments described below with reference to the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions of the embodiments of this application.

[0026] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the terms “comprising” and “including” as used in embodiments of this application mean that the corresponding feature can be implemented as the presented feature, information, data, step, operation, element, and / or component, but do not exclude implementation as other features, information, data, step, operation, element, component, and / or combinations thereof supported by the art. It should be understood that when we say that an element is “connected” or “coupled” to another element, the one element can be directly connected or coupled to the other element, or it can mean that the one element and the other element establish a connection relationship through an intermediate element. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein indicates at least one of the items defined by the term; for example, “A and / or B” indicates implementation as “A,” or implementation as “A,” or implementation as “A and B.”

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0028] The technical solutions of this application and their effects are described below through several exemplary embodiments. It should be noted that the following embodiments can be referenced, borrowed from, or combined with each other. Identical terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0029] The explosion-proof horn provided in this application is intended to solve at least one technical problem existing in the prior art.

[0030] Optionally, such as Figures 1-3 As shown, the explosion-proof speaker of this application includes a housing, a voice coil assembly 6, and a rear cover 9. The housing includes a first housing 7, which is hollow to form a first cavity for accommodating the voice coil assembly 6. The side of the voice coil assembly 6 is spaced apart from the cavity wall of the first cavity, and a protrusion is provided at the bottom of the voice coil assembly 6. The protrusion protrudes from the first end of the first housing 7. The first housing 7 is made of heat dissipation material. The rear cover 9 is inverted on the first housing 7 and forms a second cavity with the first end of the first housing 7. The protrusion is located in the second cavity.

[0031] Optionally, the protrusion can be fixed to the bottom of the voice coil assembly 6, and the bottom of the voice coil assembly 6, except for the protrusion, does not contact the first housing 7. The protrusion can be used only to fix the voice coil assembly 6, and can be an object on the voice coil assembly 6 that is unrelated to the sound production or a voice coil skeleton that is not affected by the environment. Specifically, it can be made of wood or plastic with poor thermal conductivity to reduce the influence of cold air on the voice coil assembly 6.

[0032] Optionally, the outer casing can be made of aluminum, or other materials with good thermal conductivity such as silver or copper, or high thermal conductivity ceramics (such as aluminum nitride or silicon carbide), or it can be made of metal materials electroplated with silver, copper, or other materials with good thermal conductivity.

[0033] Optionally, the side of the protrusion away from the voice coil assembly 6 is spaced apart from the side of the rear cover 9 facing the first housing 7.

[0034] Optionally, the first end side of the first housing 7 is provided with an explosion-proof external thread, and the inner side of the rear cover 9 is provided with an explosion-proof internal thread corresponding to the explosion-proof external thread. The rear cover 9 is fastened to the first housing 7 by the explosion-proof internal thread and the explosion-proof external thread.

[0035] In one embodiment, to meet explosion-proof requirements, when the rear cover 9 is fastened onto the first housing 7, the number of meshing teeth of the explosion-proof internal thread and the explosion-proof external thread can be greater than 6, the screw-in depth of the rear cover 9 can be greater than 11 mm, and the wall thickness of the first housing 7 can be greater than 5 mm.

[0036] Optionally, to prevent cold air from entering from the engagement point between the rear cover 9 and the first housing 7, a first sealing ring 8 is provided at the engagement point of the explosion-proof internal thread and the explosion-proof external thread, and the first sealing ring 8 is fitted onto the explosion-proof external thread.

[0037] Optionally, the outer shell includes a second housing 1, which is connected to the second end of the first housing 7 away from the rear cover 9. The second housing 1 has a cylindrical structure, and the diameter of the second housing 1 gradually increases as the second housing 1 moves away from the first housing 7.

[0038] Optionally, the width of the first housing 7 gradually narrows along the direction close to the second housing 1. The second end of the first housing 7 is connected to the second housing 1, and the first housing 7 and the second housing 1 can be fixedly connected by any of the following methods: welding, snap-fitting, screwing, integral molding, etc.

[0039] Optionally, the second end of the first housing 7 is provided with a first through hole and a first protrusion extending into the first cavity, the first through hole penetrating the first protrusion; the voice coil assembly 6 is provided with a second protrusion on the side away from the rear cover 9, the second protrusion being inserted into the first through hole.

[0040] In one embodiment, the first protrusion can be a cylindrical structure disposed in the first cavity, and the second protrusion of the voice coil assembly 6 is fixed in the first through hole, thereby fixing the voice coil assembly 6 in the first cavity through the second protrusion and the protrusion.

[0041] Optionally, the explosion-proof horn also includes a first pressure cap 5 and a vent plate disposed within the first through hole. The first pressure cap 5 is fitted onto the top of the second protrusion, and the vent plate is disposed on the side of the first pressure cap 5 away from the voice coil assembly 6. The pressure cap can separate the first housing 7 from the voice coil assembly 6, reducing the impact of the external environment.

[0042] Optionally, the diameter of the first through hole is smaller than the diameters of both ends, and the diameter of one end of the first through hole where the first pressure cap 5 is disposed is smaller than the diameter of the other end of the first through hole.

[0043] Alternatively, the vent can be made of metal and is disposed within the first through hole, and the size of the vent can correspond to the size of the top of the second protrusion.

[0044] Optionally, the system further includes a second cap 4 with a cap body and an extension. One end of the cap body extends into the end of the first through hole away from the first cavity, and the other end of the cap body extends away from the first cavity. The extension is located on the side of the first housing 7 away from the rear cover 9, surrounds the cap body, and one side of the extension is connected to the cap body, while the other side extends away from the cap body. The bottom of the cap body is located within the first through hole, and the outer diameter of the bottom of the cap body is larger than the outer diameter of the first protrusion.

[0045] Optionally, the cap body and the extension can be fixed together in an integral molding manner, and the extension can extend smoothly away from the cap body.

[0046] Optionally, the explosion-proof horn also includes a sound guide tube 3, with a second through hole formed in the hollow cap body. The first end of the sound guide tube 3 is inserted into the second through hole, and the second end of the sound guide tube 3 extends away from the first housing 7. The diameter of the second end of the sound guide tube 3 is larger than the diameter of the first end of the sound guide tube 3.

[0047] Optionally, the first end of the sound guide tube 3 is provided with an enlarged part, the diameter of which gradually expands in the direction away from the second end of the sound guide tube 3, and the inner diameter of the cap body changes accordingly with the shape of the enlarged part.

[0048] Optionally, the explosion-proof horn also includes a fixing member and an inner cylinder 2. The fixing member surrounds the cap body, and one end of the fixing member is fixed to the side of the extension away from the first housing 7. The inner cylinder 2 is hollow, and one end of the inner cylinder 2 is fixed to the fixing member on the side away from the cap body. The side of the fixing member closest to the cap body is connected to the cap body. The height of the top of the fixing member can correspond to the height of the top of the cap body.

[0049] Optionally, the diameter of the inner cylinder 2 on the side closer to the fixing member is larger than the diameter of the inner cylinder 2 on the side farther from the fixing member. The sound guide tube 3 is disposed inside the inner cylinder 2.

[0050] Optionally, the fastener has a screw hole on its side, and the first screw 12 passes through the inner cylinder 2 and is fixed in the screw hole, thereby fixing the inner cylinder 2 to the fastener. Specifically, the first screw 12 can be a cross-head pan head screw, and the number of first screws 12 can be at least one.

[0051] Optionally, the explosion-proof horn also includes a handle 13 and fixing holes. The fixing holes are symmetrically arranged on both sides of the first housing 7, and the two ends of the handle 13 pass through the fixing holes on the first housing 7.

[0052] In one embodiment, there can be two fixing holes. The handle 13 has both ends bent to form a bent portion, and one end of the bent portion is fixed to the first housing 7 through the fixing hole. The handle 13 can be made of aluminum or aluminum alloy. The handle 13 can be rotatably fixed to the first housing 7 by screwing a hexagonal bolt into the fixing hole. To improve the fixing effect, a washer can also be provided on the hexagonal bolt.

[0053] Optionally, it also includes an opening and a plug 11, the opening being connected to the first cavity, the plug 11 being screwed into the opening, and a second sealing ring 10 being fitted on the side of the plug 11.

[0054] In one embodiment, the end of the plug 11 inserted into the opening is provided with an external thread, and the fixing hole is provided with an internal thread. The number of meshing teeth between the plug 11 and the fixing hole can be greater than 12, and the depth to which the plug 11 is screwed into the fixing hole can be greater than 18 mm.

[0055] The above structure effectively expands the temperature range that the explosion-proof horn can adapt to (e.g., -50℃ to 60℃), greatly increasing the environmental adaptability of the explosion-proof horn.

[0056] The explosion-proof speaker housing of this application embodiment includes a first housing, which is hollow to form a first cavity for accommodating a voice coil assembly. The side of the voice coil assembly is spaced apart from the cavity wall of the first cavity, and the protrusion of the voice coil assembly protrudes from the first end of the first housing. The first housing is made of heat-dissipating material. A rear cover is inverted on the first housing and forms a second cavity with the first end of the first housing. The protrusion is located in the second cavity. This application embodiment can improve the heat dissipation efficiency of the explosion-proof speaker and enhance the isolation effect through the first housing and the rear cover, effectively reducing the impact of low temperature environment and enhancing the environmental adaptability of the explosion-proof speaker.

[0057] The terms "first," "second," "third," "fourth," "1," "2," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in a sequence other than that shown in the figures or text.

[0058] It should be understood that although arrows indicate various operation steps in the flowcharts of this application's embodiments, the order in which these steps are implemented is not limited to the order indicated by the arrows. Unless explicitly stated herein, in some implementation scenarios of this application's embodiments, the implementation steps in each flowchart can be executed in other orders as required. Furthermore, some or all steps in each flowchart, based on the actual implementation scenario, may include multiple sub-steps or multiple stages. Some or all of these sub-steps or stages can be executed at the same time, and each sub-step or stage can also be executed at different times. In scenarios where execution times differ, the execution order of these sub-steps or stages can be flexibly configured according to requirements, and this application's embodiments do not limit this.

[0059] The above description is only an optional implementation method for some implementation scenarios of this application. It should be noted that for those skilled in the art, other similar implementation methods based on the technical concept of this application without departing from the technical concept of this application also fall within the protection scope of the embodiments of this application.

Claims

1. An explosion-proof horn, characterized in that, The device includes a housing, a voice coil assembly, and a rear cover. The housing includes a first housing, which is hollow to form a first cavity for accommodating the voice coil assembly. The side of the voice coil assembly is spaced apart from the cavity wall of the first cavity, and the bottom of the voice coil assembly has a protrusion that protrudes from a first end of the first housing. The first housing is made of a heat-dissipating material. The rear cover is inverted and placed on the first housing, forming a second cavity with the first end of the first housing, and the protrusion is located in the second cavity.

2. The explosion-proof horn according to claim 1, characterized in that, The first end side of the first housing is provided with an explosion-proof external thread, and the inner side of the rear cover is provided with an explosion-proof internal thread corresponding to the explosion-proof external thread. The rear cover is fastened to the first housing through the explosion-proof internal thread and the explosion-proof external thread.

3. The explosion-proof horn according to claim 1, characterized in that, The outer casing includes a second housing, which is connected to the second end of the first housing away from the rear cover. The second housing has a cylindrical structure, and its diameter gradually increases as it moves further away from the first housing.

4. The explosion-proof horn according to claim 1, characterized in that, The second end of the first housing is provided with a first through hole and a first protrusion extending into the first cavity, the first through hole penetrating the first protrusion; The voice coil assembly has a second protrusion on the side away from the rear cover, and the second protrusion is inserted into the first through hole.

5. The explosion-proof horn according to claim 4, characterized in that, It also includes a first pressure cap and a vent plate disposed in the first through hole. The first pressure cap is sleeved on the top of the second protrusion, and the vent plate is disposed on the side of the first pressure cap away from the voice coil assembly.

6. The explosion-proof horn according to claim 4, characterized in that, It also includes a second pressure cap with a cap body and an extension. One end of the cap body extends into the end of the first through hole away from the first cavity, and the other end of the cap body extends away from the first cavity. The extension is located on the side of the first housing away from the back cover. The extension surrounds the cap body, and one side of the extension is connected to the cap body, while the other side extends away from the cap body.

7. The explosion-proof horn according to claim 6, characterized in that, It also includes a sound guide tube, the cap body is hollow to form a second through hole, the first end of the sound guide tube is inserted into the second through hole, the second end of the sound guide tube extends away from the first shell, and the diameter of the second end of the sound guide tube is larger than the diameter of the first end of the sound guide tube.

8. The explosion-proof horn according to claim 6, characterized in that, It also includes a fastener and an inner tube, wherein the fastener surrounds the cap body and one end of the fastener is fixed to the side of the extension away from the first housing, and the inner tube is hollow and one end of the inner tube is fixed to the fastener on the side away from the cap body.

9. The explosion-proof horn according to claim 1, characterized in that, It also includes a handle and fixing holes, the fixing holes being symmetrically arranged on both sides of the first housing, and the two ends of the handle being attached to the first housing through the fixing holes.

10. The explosion-proof horn according to claim 9, characterized in that, It also includes an opening and a plug, wherein the opening communicates with the first cavity, the plug is screwed into the opening, and a second sealing ring is fitted on the side of the plug.

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