CN216217385U

CN216217385U - Waterproof sound box

Info

Publication number: CN216217385U
Application number: CN202122436531.3U
Authority: CN
Inventors: 崔建朋; 张瑞; 刘召欢; 周岩; 于洋
Original assignee: Hebei Hanguang Heavy Industry Ltd
Current assignee: Hebei Hanguang Heavy Industry Ltd
Priority date: 2021-10-11
Filing date: 2021-10-11
Publication date: 2022-04-05
Anticipated expiration: 2031-10-11

Abstract

The utility model discloses a waterproof sound box, which comprises a shell, a waterproof sound-transmitting membrane, a loudspeaker, a circuit board and a rear cover plate, wherein the shell is provided with a sound-transmitting opening; one end of the shell is open, the bottom wall of the other end of the shell is provided with a plurality of through holes, and the interior of the shell is a cavity; the rear cover plate is detachably connected with the opening end of the shell; the waterproof sound-transmitting membrane is adhered to the shell and covers the through hole; the loudspeaker is arranged in the cavity, and the vibrating diaphragm of the loudspeaker is opposite to the through hole; the circuit board is arranged between the loudspeaker and the rear cover plate. The sound box has the advantages of water resistance and high sound quality.

Description

Waterproof sound box

Technical Field

The utility model relates to the technical field of sound boxes, in particular to a waterproof sound box.

Background

A sound box is a device for converting an electrical signal into an acoustic signal, and generally includes main components such as a speaker, a box body, and a frequency divider. The box body can eliminate the acoustic short circuit of the loudspeaker, inhibit the acoustic resonance of the loudspeaker and widen the frequency response range of the loudspeaker, thereby reducing the distortion of sound.

The sound box can be classified into various forms such as a closed type, a phase inversion type and a band pass type according to the structure of the box body. The front and the back of the loudspeaker diaphragm of the closed sound box are two spaces which are not ventilated mutually, and reverse-phase sound waves radiated backwards by the diaphragm of the loudspeaker are completely isolated by the box body and cannot run out of the box body to be offset with positive-phase sound waves in front of the diaphragm.

However, in the conventional closed type sound box, since the space inside and outside the box body is completely isolated, the air pressure inside and outside the box body cannot reach equilibrium, thereby affecting the acoustic characteristics of the sound box, and since the speaker is not completely closed, the sound box cannot be waterproof.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a waterproof sound box, in which a speaker is completely disposed in a casing, and a waterproof sound-transmitting membrane covering a through hole is disposed on a bottom wall of the casing opposite to a diaphragm of the speaker, so that air pressure inside and outside the casing is equalized, sound quality is improved, and the sound box has waterproof performance.

The utility model adopts the following specific technical scheme:

a waterproof sound box comprises a shell, a waterproof sound-transmitting membrane, a loudspeaker, a circuit board and a rear cover plate;

one end of the shell is open, the bottom wall of the other end of the shell is provided with a plurality of through holes, and the interior of the shell is a cavity;

the rear cover plate is detachably connected to the opening end of the shell;

the waterproof sound-transmitting membrane is adhered to the shell and covers the through hole;

the loudspeaker is arranged in the cavity, and a vibrating diaphragm of the loudspeaker is opposite to the through hole;

the circuit board is arranged between the loudspeaker and the rear cover plate.

Further, the through hole is a counter bore.

Further, the counter bores are reverse side counter bores.

Further, the waterproof sound-transmitting membrane is located inside the cavity.

Further, the device also comprises a conductive rubber plate;

the conductive rubber plate is clamped between the rear cover plate and the shell.

Further, the speaker is fixedly mounted on the boss of the bottom wall through a pillar.

Further, one end of the strut is provided with an external thread;

the boss is provided with an internal thread;

the support is in threaded connection with the boss.

Further, the other end of the strut is provided with an internal thread;

the circuit board is fixed on the support column through a screw connected with the internal thread.

Furthermore, the pillar is two segmentation ladder cylinders, just the external screw thread is located the less one end of pillar diameter, the internal thread is located the great one end of pillar diameter.

Furthermore, the sound box further comprises a power supply connecting piece arranged at one end of the rear cover plate, and the loudspeaker, the circuit board and the power supply connecting piece are electrically connected through a wire.

Has the advantages that:

1. the utility model provides a waterproof sound box, which completely arranges the loudspeaker inside the cavity of the shell, and the bottom wall of the shell opposite to the vibrating diaphragm of the loudspeaker is provided with a waterproof sound-transmitting film covering the through hole, the waterproof sound-transmitting film can ventilate, thereby the air pressure inside and outside the cavity of the sound box is balanced, and the sound quality of the sound box is improved;

2. the waterproof sound-transmitting membrane of the waterproof sound box can not only ventilate, but also prevent water, thereby leading the sound box to have waterproof performance;

3. the through hole arranged in the waterproof sound box provided by the utility model is a counter-bore, namely, the diameter of one end of the through hole close to the inner wall of the cavity of the shell is larger, which not only can meet the requirement of the opening area of the sound box, but also can accumulate a small amount of water in the counter-bore to avoid water drops from splashing into the cavity, thereby further enhancing the waterproof performance of the sound box;

4. the reverse side counter bore of the waterproof sound box provided by the utility model can not only prevent water drops from splashing into the cavity, but also reduce the penetration distance when the sound emitted by the loudspeaker is transmitted outwards through the box body, thereby reducing the sound transmission loss and further improving the sound quality of the sound box;

5. the utility model discloses a waterproof audio amplifier that provides has set up the conductive rubber board at audio amplifier casing's open end, can shield the outside electromagnetic interference of audio amplifier cavity through the conductive rubber board, promotes the tone quality of audio amplifier.

Drawings

Fig. 1 is a schematic view of the overall structure of the waterproof sound box of the present invention;

FIG. 2 is a view of the strut of FIG. 1;

fig. 3 is a schematic view of the structure in the direction a of fig. 1.

The loudspeaker comprises a shell 1, a through hole 2, a waterproof sound-transmitting membrane 3, a loudspeaker 4, a circuit board 5, a conductive rubber plate 6, a rear cover plate 7, a power supply connecting piece 8 and a support 9.

Detailed Description

The utility model is described in detail below by way of example with reference to the accompanying drawings:

fig. 1 shows a waterproof sound box provided by the present invention, which includes a casing 1, a waterproof sound-transmitting membrane 3, a speaker 4, a circuit board 5, and a back cover plate 7; the interior of the shell 1 is a cavity, one end of the cavity is open, the other end opposite to the opening of the cavity is a bottom wall of the shell 1, and a plurality of through holes 2 are formed in the bottom wall and used for communicating the interior and the exterior of the cavity of the sound box; a rear cover plate 7 is detachably attached to the open end of the housing 1 for closing the internal cavity of the housing; the waterproof sound-transmitting membrane 3 is adhered to the bottom wall of the shell 1 and covers the through holes 2, so that the through holes 2 can prevent water from entering the cavity of the sound box while transmitting sound; a boss with internal threads is arranged on the bottom wall of the sound box, one end of the support column 9 is provided with external threads, one end of the support column 9 with the external threads passes through the mounting hole of the loudspeaker 4 and then is in threaded connection with the boss, the loudspeaker 4 is fixed on the boss, and the vibrating diaphragm of the loudspeaker 4 is opposite to the through hole 2, so that the sound emitted by the loudspeaker 4 is mainly transmitted to the outside of the cavity through the through hole 2; the other end of the strut 9 is positioned between the loudspeaker 4 and the rear cover plate 7 and is provided with an internal thread, and a screw passes through a mounting hole of the circuit board 5 and then is in threaded connection with the internal thread to fix the circuit board 5; a power supply connecting piece 8 is arranged on the rear cover plate 7, and the power supply connecting piece 8 can be a power supply jack or a power supply plug and the like and is used for connecting an external power supply and supplying power to the sound box; the speaker 4, the circuit board 5, and the power supply connector 8 are connected by wires.

In view of the installation manufacturability of the loudspeaker 4 and the circuit board 5, as shown in fig. 2, the structure diagram of the strut 9 in the loudspeaker box provided by the utility model is that the strut 9 is designed into a two-section stepped cylinder, wherein the external thread is positioned at the end with the smaller diameter of the strut 9, the internal thread is positioned at the end with the larger diameter of the strut 9, and the end with the larger diameter of the strut 9 is provided with a linear notch, so that when the loudspeaker 4 is installed, the end surface of the transition part of the small diameter section to the large diameter section of the strut 9 can be completely contacted with the loudspeaker 4 to limit the strut 9, and meanwhile, a linear screwdriver can be conveniently used for screwing the strut 9, and the strut 9 can be provided with a cross-shaped notch or even without a notch except for the linear notch; considering the tone quality of the sound box, the through hole 2 is set as a counter bore, and referring to fig. 1 and fig. 3, namely, the diameter of one end of the through hole 2 close to the inner wall of the cavity of the shell 1 is larger, such as 1.6mm, and the diameter of the other end close to the outer side of the shell is smaller, such as 1.2mm, so that the penetration distance of sound emitted by the loudspeaker 4 when the sound is transmitted outwards through the shell 1 can be reduced, thereby reducing the sound transmission loss, improving the tone quality of the sound box, simultaneously meeting the requirement of the opening area of the sound box, accumulating a small amount of water splashed into the outside of the sound box in the counter bore, and avoiding that water drops are directly splashed into the cavity and harm devices in the cavity; this audio amplifier can also press from both sides between back shroud 7 and casing 1 and establish conductive rubber board 6, makes the audio amplifier can shield external electromagnetic interference like this, reaches the purpose that promotes audio amplifier tone quality.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A waterproof sound box is characterized by comprising a shell (1), a waterproof sound-transmitting membrane (3), a loudspeaker (4), a circuit board (5) and a rear cover plate (7);

one end of the shell (1) is open, the bottom wall of the other end of the shell is provided with a plurality of through holes (2), and the interior of the shell is a cavity;

the rear cover plate (7) is detachably connected to the opening end of the shell (1);

the waterproof sound-transmitting membrane (3) is adhered to the shell (1) and covers the through hole (2);

the loudspeaker (4) is arranged in the cavity, and a vibrating diaphragm of the loudspeaker is opposite to the through hole (2);

the circuit board (5) is arranged between the loudspeaker (4) and the rear cover plate (7).

2. The waterproof sound box according to claim 1, characterized in that the through-hole (2) is a counter bore.

3. The waterproof sound box of claim 2, wherein the counter bore is a reverse counter bore.

4. The waterproof sound box according to claim 1, characterized in that the waterproof sound-permeable membrane (3) is located inside the cavity.

5. The waterproof sound box according to claim 1, further comprising a conductive rubber sheet (6);

the conductive rubber plate (6) is clamped between the rear cover plate (7) and the shell (1).

6. The watertight sound box according to claim 1, characterized in that the loudspeaker (4) is fixedly mounted to the boss of the bottom wall by means of a pillar (9).

7. The waterproof sound box according to claim 6, characterized in that one end of the strut (9) is provided with an external thread;

the boss is provided with an internal thread;

the support post (9) is in threaded connection with the boss.

8. The waterproof sound box according to claim 7, characterized in that the other end of the strut (9) is provided with an internal thread;

the circuit board (5) is fixed on the support column (9) through a screw connected with the internal thread.

9. The waterproof sound box according to claim 8, characterized in that the pillar (9) is a two-part stepped cylinder, and the external thread is located at the end of the pillar (9) with the smaller diameter and the internal thread is located at the end of the pillar (9) with the larger diameter.

10. The waterproof sound box according to any one of claims 1 to 9, further comprising a power connector (8) disposed at one end of the rear cover plate (7), wherein the speaker (4), the circuit board (5) and the power connector (8) are electrically connected by a wire.