An explosion-proof speaker

Abstract

The utility model relates to an explosion-proof speaker, including a rear bowl, a large tube and a middle tube. The rear bowl is connected to the large tube forward, and the large tube is connected to an explosion-proof ring downward. The explosion-proof ring is placed and fits the inner wall of the rear bowl and the outer wall of the U iron to form inner and outer explosion-proof surfaces. The bottom of the large tube is connected to the echo tube structure of the phase plug and an explosion-proof net is arranged inside. The coaxial gap cover of the middle tube is installed outside the echo tube structure and is connected to the bottom of the large tube by locking support. The center of the inner top wall of the middle tube is protruding downward to set a sound divider. The explosion-proof ring is used to form the inner and outer explosion-proof surfaces with the inner wall of the rear bowl and the outer wall of the U iron to prevent water and air from entering the connection between the rear bowl and the large tube, thereby improving the explosion-proof effect. The explosion-proof net is built into the echo tube structure above the phase plug and screwed and pressed by threads. On the basis of positive air permeability from the phase plug to the outside, it can ensure that the sound cavity is airtight and watertight in the reverse direction, and the explosion-proof protection performance of the sound cavity is more stable.

Description

Technical Field

[0001] The utility model relates to a speaker, in particular to an explosion-proof speaker. Background Art

[0002] Speakers and loudspeakers used in different explosion-proof areas have different degrees of explosion-proof requirements. The explosion-proof structure of traditional explosion-proof speakers mainly focuses on the explosion-proof of the outer shell, heat dissipation, and prevention of static sparks, and there are very few explosion-proof structures inside the sound cavity. Summary of the invention

[0003] The utility model provides an explosion-proof speaker which has a simple structure and can effectively isolate the interior of a sound cavity from explosion.

[0004] The technical solution adopted by the utility model is: an explosion-proof speaker, including a rear bowl, a large tube and a middle tube, the rear bowl is connected to the large tube forward, a U-iron is supported and installed in the rear bowl, a magnetic steel and a pole plate are positioned and supported in the step hole of the U-iron, a sound diaphragm is arranged above the pole plate, and the horizontal edge of the outer periphery of the sound diaphragm is supported on the upper end surface outside the step hole of the U-iron through the large tube, the voice coil below the sound diaphragm is vertically placed between the inner wall of the step hole of the U-iron and the pole plate, and a phase plug is arranged above the sound diaphragm, characterized in that: the large tube is connected to the explosion-proof ring downward, the explosion-proof ring is placed and fits the inner wall of the rear bowl and the outer wall of the U-iron to form inner and outer explosion-proof surfaces, an explosion-proof net is arranged in the echo tube structure of the bottom of the large tube connected to the phase plug, the coaxial gap cover of the middle tube is installed outside the echo tube structure and is locked and supported and connected to the bottom of the large tube, a sound splitter is arranged in the center of the inner top wall of the middle tube protruding downward, and an explosion-proof gland for lead-out wires is arranged on the rear bowl.

[0005] The large cylinder and the rear bowl are made of aluminum alloy.

[0006] The large cylinder and the echo cylinder structure are integrally cast.

[0007] The support ring on the periphery of the phase plug is pressed downwardly against the horizontal edge of the periphery of the voice coil, and the step at the lower end of the large cylinder presses the upper end of the support ring on the periphery of the phase plug.

[0008] The echo cylinder structure under the flameproof net is connected to the cavity of the U iron to form a flameproof cavity.

[0009] An upward or downward explosion-proof step is arranged on the inner wall of the echo cylinder structure, and the explosion-proof step abuts against the explosion-proof net upward or downward. A clamping thread is arranged on the inner wall of the echo cylinder structure above or below the explosion-proof step. The outer wall of the clamping nut is screwed with the clamping thread to clamp the explosion-proof net downward or upward, and the through hole in the clamping nut connects the explosion-proof net and the phase plug.

[0010] The sound dividing head is a spherical structure.

[0011] The step at the lower end of the large cylinder is pressed against the upper end of the outer peripheral support ring of the phase plug through the first gasket, and the large cylinder is locked and connected to the rear bowl through the second gasket.

[0012] The lower end of the large cylinder is supported on the upper end surface outside the U-iron step hole by pressing the horizontal edge of the voice coil through the third gasket.

[0013] The beneficial effects of the utility model are:

[0014] 1. The use of cable glands for lead-in is conducive to improving the explosion-proof performance of the rear bowl wiring; the use of explosion-proof rings, the inner wall of the rear bowl and the outer wall of the U iron to form inner and outer explosion-proof surfaces prevents water and air from entering the connection between the rear bowl and the large cylinder, further improving the explosion-proof effect; the explosion-proof net is built into the echo cylinder structure above the phase plug and screwed and pressed by threads, which can ensure that the sound cavity is airtight and watertight in the reverse direction on the basis of positive air permeability from the phase plug to the outside, and the explosion-proof protection performance of the sound cavity is more stable. Combined with the use of aluminum alloy for the large cylinder and the rear bowl, the explosion-proof performance of the external protection is effectively guaranteed.

[0015] 2. The phase plug is crimped onto a large tube and directly crimped onto the voice coil. Compared to the traditional structure where the phase plug is connected to a large tube, it can more accurately control the gap between the voice coil and the phase plug, thus ensuring the sensitivity of the speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0017] Figure 2 for Figure 1 Front view of .

[0018] In the figure: rear bowl 1, U iron 2, magnetic steel 3, pole plate 4, large cylinder 5, explosion-proof ring 6, echo cylinder structure 7, explosion-proof net 8, tightening nut 9, phase plug 10, support ring 11, sound membrane 12, horizontal edge 13, voice coil 14, middle cylinder 15, and crossover head 16. DETAILED DESCRIPTION

[0019] The following is a further description with reference to the accompanying drawings.

[0020] Figure 1-2As shown: an explosion-proof speaker, including a rear bowl 1, a U-iron 2, a magnetic steel 3, a pole plate 4, a large cylinder 5, a flameproof ring 6, an echo cylinder structure 7, a flameproof net 8, a compression nut 9, a phase plug 10, a sound diaphragm 12 and a middle cylinder 15. The U-iron 2 is supported and installed in the rear bowl 1, and the magnetic steel 3 and the pole plate 4 are positioned and supported in the step hole of the U-iron 2. The sound diaphragm 12 is arranged above the pole plate 4. The horizontal edge 13 of the outer periphery of the sound diaphragm 12 is pressed and supported on the upper end surface outside the step hole of the U-iron 2 through the large cylinder 5. The voice coil 14 below the sound diaphragm 12 is vertically placed between the inner wall of the step hole of the U-iron 2 and the pole plate 4. The large cylinder 5 is connected to the flameproof ring 6 downward, and the flameproof ring 6 is placed and attached to the inner wall of the rear bowl 1 and the outer wall of the U-iron 2 to form inner and outer flameproof surfaces. The lower end of the large cylinder 5 is also crimped to the upper end of the support ring 11 of the phase plug 10 through the step, and the lower end of the support ring 11 is crimped to the water edge of the sound diaphragm 12. 13. The bottom of the large cylinder 5 is upwardly connected to the echo cylinder structure 7, a downward explosion-proof step is arranged on the inner wall of the echo cylinder structure 7, the explosion-proof step is downwardly abutted against the explosion-proof net 8, a clamping thread is arranged on the inner wall of the echo cylinder structure 7 below the explosion-proof step, the outer wall of the clamping nut 9 is screwed with the clamping thread to clamp the explosion-proof net 8 upward, the inner through hole of the clamping nut 9 is connected to the phase plug and the explosion-proof net, the echo cylinder structure under the explosion-proof net is connected to the U-iron chamber as the explosion-proof chamber; the middle cylinder 15 coaxial gap cover is installed outside the echo cylinder structure 7 and is locked and supported and connected to the inner bottom of the large cylinder 5, and a sound divider 16 is arranged on the center of the inner top wall of the middle cylinder 15 protruding downward.

[0021] In this embodiment, an explosion-proof cable gland for leading out the lead wire is provided at the rear end of the rear bowl.

[0022] In this embodiment, the main cylinder and the rear bowl are made of aluminum alloy, and the main cylinder and the echo cylinder structure are integrally cast, which is beneficial to improving the explosion-proof performance.

[0023] On the basis of this embodiment, in order to adjust the gap between the phase plug and the sound diaphragm and ensure sensitivity, the upper end of the outer peripheral support ring of the phase plug can be pressed by the first gasket at the step at the lower end of the large cylinder, the large cylinder is locked and connected to the rear bowl by the second gasket, and the lower end of the large cylinder is pressed by the third gasket to support the horizontal edge of the voice coil on the upper end surface outside the U iron step hole. While ensuring the stability of the crimping, it is more conducive to ensuring the phase plug, the sound diaphragm gap and the sensitivity.

Claims

1. An explosion-proof speaker, comprising a rear bowl, a large cylinder and a middle cylinder, wherein the rear bowl is connected to the large cylinder forward, a U-iron is supported and installed in the rear bowl, a magnetic steel and a pole plate are positioned and supported in a step hole of the U-iron, a sound diaphragm is arranged above the pole plate, a horizontal edge of the outer periphery of the sound diaphragm is pressed and supported on the upper end surface outside the step hole of the U-iron through the large cylinder, a voice coil below the sound diaphragm is vertically placed between the inner wall of the step hole of the U-iron and the pole plate, and a phase plug is arranged above the sound diaphragm, characterized in that: The large tube is connected downward with an explosion-proof ring, which is placed on and fits the inner wall of the rear bowl and the outer wall of the U iron to form inner and outer explosion-proof surfaces. The bottom of the large tube is connected to the echo tube structure of the phase plug and an explosion-proof net is arranged inside. The coaxial gap cover of the middle tube is installed outside the echo tube structure and is locked and supported and connected to the bottom of the large tube. The center of the inner top wall of the middle tube is protruding downward to set a crossover head.

2. The explosion-proof speaker according to claim 1, characterized in that: The rear bowl is provided with an explosion-proof cable gland for leading out the lead wire.

3. The explosion-proof speaker according to claim 1, characterized in that: The large cylinder and the rear bowl are made of aluminum alloy.

4. An explosion-proof speaker according to claim 1 or 3, characterized in that: The large cylinder and the echo cylinder structure are integrally cast.

5. The explosion-proof speaker according to claim 1, characterized in that: The support ring on the periphery of the phase plug is pressed downwardly against the horizontal edge of the periphery of the voice coil, and the step at the lower end of the large cylinder presses the upper end of the support ring on the periphery of the phase plug.

6. The explosion-proof speaker according to claim 1, characterized in that: The echo cylinder structure under the flameproof net is connected to the cavity of the U iron to form a flameproof cavity.

7. The explosion-proof speaker according to claim 1, characterized in that: An upward or downward explosion-proof step is arranged on the inner wall of the echo cylinder structure, and the explosion-proof step abuts against the explosion-proof net upward or downward. A clamping thread is arranged on the inner wall of the echo cylinder structure above or below the explosion-proof step. The outer wall of the clamping nut is screwed with the clamping thread to clamp the explosion-proof net downward or upward, and the through hole in the clamping nut connects the explosion-proof net and the phase plug.

8. The explosion-proof speaker according to claim 1, characterized in that: The sound dividing head is a spherical structure.

9. The explosion-proof speaker according to claim 5, characterized in that: The step at the lower end of the large cylinder is pressed against the upper end of the outer peripheral support ring of the phase plug through the first gasket, and the large cylinder is locked and connected to the rear bowl through the second gasket.

10. The explosion-proof speaker according to claim 9, characterized in that: The lower end of the large cylinder is supported on the upper end surface outside the U-iron step hole by pressing the horizontal edge of the voice coil through the third gasket.

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