Explosion-proof loudspeaker

Abstract

The utility model discloses an explosion-proof horn, comprising a cup-shaped box body, the bottom of the box body is provided with a sounding hole, the box body is internally provided with a horn body, the horn body is fixed in the box body through a screw towards the sounding hole, the box body is provided with an annular installation part which protrudes outwards at the sounding hole, and the installation part is provided with an annular groove. A mounting part is arranged in the box body, a fire retardant disc is arranged in the mounting part, the mounting part is sleeved with a horn-shaped loudspeaker, an annular first sealing groove is formed in the outer portion of the mounting part, an annular first sealing ring is arranged in the first sealing groove, and a box cover for sealing the box body is connected to an opening of the box body through screws. The box cover comprises an annular sealing part extending into the box body, an annular second sealing groove is formed in the outer side of the sealing part, and an annular second sealing ring is arranged in the second sealing groove. The beneficial effects of the utility model are that each link of the loudspeaker is subjected to explosion-proof processing, and the explosion-proof performance is greatly improved while the function is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of explosion-proof, in particular to an explosion-proof speaker. Background Art

[0002] Each component of an electric forklift used in certain special occasions needs to be explosion-proofed to prevent electric sparks from igniting flammable gases or flammable materials and causing accidents, including explosion-proofing the horn used in the electric forklift, or designing an explosion-proof horn. This is the technical problem to be solved by the utility model. Utility Model Content

[0003] The purpose of the utility model is to provide an explosion-proof speaker that solves the above technical problems.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A kind of explosion-proof loudspeaker comprises a cup-shaped box body, a sound-producing hole is formed at the bottom of the box body, a loudspeaker body is arranged in the box body, the loudspeaker body is fixed in the box body by screws in the direction of the sound-producing hole, the box body is provided with an annular mounting part protruding outward at the sound-producing hole, a fire-blocking disk is arranged in the mounting part, a loudspeaker-shaped loudspeaker is arranged outside the mounting part, an annular first sealing groove is arranged outside the mounting part, an annular first sealing ring is arranged in the first sealing groove, a box cover closing the box body is screwed to the opening of the box body, the box cover comprises an annular sealing part extending into the box body, an annular second sealing groove is arranged outside the sealing part, and an annular second sealing ring is arranged in the second sealing groove.

[0006] Preferably, a cable gland is provided on the side wall of the box body, and the cable passes through the cable gland to connect to the speaker body.

[0007] Preferably, the mounting portion is integrally formed with the box body.

[0008] Preferably, the loudspeaker is threadably connected to the mounting portion.

[0009] Preferably, the cable gland is threadedly connected to the box body.

[0010] Preferably, sealant is applied at the connection between the cable gland and the box body.

[0011] Preferably, a bushing made of rubber is provided between the fire-blocking disk and the horn body.

[0012] The beneficial effect of the utility model is that explosion-proof treatment is performed on each link of the speaker, which greatly improves the explosion-proof performance while ensuring the function. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a right view of the utility model;

[0014] Figure 2 It is a front view of the utility model;

[0015] Figure 3 yes Figure 1 Middle EL-EL section view;

[0016] Figure 4 yes Figure 2 DR-DR section view. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods.

[0018] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0019] like Figures 1 to 4 As shown, an explosion-proof speaker of the utility model includes a cup-shaped box body 10. A sound hole 12 is provided at the bottom of the box body 10, and a speaker body 14 is arranged in the box body 10. The speaker body 14 is fixed in the box body 10 by screws 34 toward the sound hole 12. The box body 10 is provided with an annular mounting portion 16 protruding outward at the sound hole 12, and the mounting portion 16 is integrally formed with the box body 10.

[0020] The mounting portion 16 is provided with a fire-blocking disk 18, and the mounting portion 16 is provided with a trumpet-shaped loudspeaker 20. The fire-blocking disk 18 is a fire-proof structure, and adopts a metal mesh structure, which can prevent the electric spark generated inside from overflowing when sound passes through.

[0021] The loudspeaker 20 is threadedly connected to the mounting portion 16 . An annular first sealing groove is disposed outside the mounting portion 16 . An annular first sealing ring 22 is disposed in the first sealing groove. The loudspeaker 20 is pressed on the first sealing ring 22 .

[0022] The box cover 24 for closing the box 10 is connected to the opening of the box 10 by screws 34. The box cover 24 includes an annular sealing portion 26 extending into the box 10. An annular second sealing groove is arranged on the outer side of the sealing portion 26, and an annular second sealing ring 28 is arranged in the second sealing groove.

[0023] A cable gland 30 is provided on the side wall of the box body 10, and the cable passes through the cable gland 30 to connect to the speaker body 14. The cable gland 30 is threadedly connected to the box body 10. The connection between the cable gland 30 and the box body 10 is coated with sealant.

[0024] A bushing 32 made of rubber is provided between the fire-blocking disk 18 and the horn body 14 . The bushing 32 is used for shock absorption. The bushing 32 is squeezed by the fire-blocking disk 18 and the horn body 14 , and can form a sealing structure at the same time.

[0025] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An explosion-proof speaker, comprising a cup-shaped box, characterized in that: A sound-producing hole is provided at the bottom of the box body, a speaker body is arranged in the box body, and the speaker body is fixed in the box body by screws toward the sound-producing hole. The box body is provided with an outwardly protruding annular mounting portion at the sound-producing hole, a fire-blocking disk is arranged in the mounting portion, a horn-shaped loudspeaker is arranged on the outer cover of the mounting portion, an annular first sealing groove is arranged outside the mounting portion, an annular first sealing ring is arranged in the first sealing groove, a box cover closing the box body is screwed to the opening of the box body, the box cover includes an annular sealing portion extending into the box body, an annular second sealing groove is arranged on the outer side of the sealing portion, and an annular second sealing ring is arranged in the second sealing groove.

2. An explosion-proof speaker according to claim 1, characterized in that: A cable gland is arranged on the side wall of the box body, and the cable passes through the cable gland to connect with the speaker body.

3. An explosion-proof speaker according to claim 1, characterized in that: The mounting portion is integrally formed with the box body.

4. The explosion-proof speaker according to claim 1, characterized in that: The loudspeaker is threadedly connected to the mounting portion.

5. The explosion-proof speaker according to claim 2, characterized in that: The cable gland is threadedly connected to the box body.

6. An explosion-proof speaker according to claim 5, characterized in that: The connection between the cable gland and the box body is coated with sealant.

7. The explosion-proof speaker according to claim 1, characterized in that: A bushing made of rubber is arranged between the fire-blocking disc and the horn body.

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