Waterproof microphone apparatus

Abstract

The present application provides a waterproof microphone apparatus. The waterproof microphone apparatus is installed on a vehicle body, and the vehicle body comprises a framework provided with a circular opening. The waterproof microphone apparatus comprises a shell, a circuit board provided in the shell, a microphone installed on the circuit board, a cover plate connected to the shell and the framework, a first waterproof film sealed on the cover plate, and a mask fixed to the cover plate; the inner wall of the framework where the opening is formed gradually inwardly inclines from the outer surface to the inner surface of the framework; the mask comprises a first wall facing the outside of the vehicle body, a second wall opposite to the first wall, and an outer sidewall connected to the first wall and the second wall; the outer sidewall gradually inwardly inclines from the first wall to the second wall, so that an inclined annular sound inlet channel is formed between the inner wall of the opening of the framework and the outer sidewall of the mask. The waterproof microphone apparatus of the present application can achieve a good waterproof effect, and have a more stable structure and an attractive appearance.

Description

Waterproof microphone device Technical Field

[0001] The utility model relates to the technical field of microphones, and in particular to a waterproof vehicle microphone device. Background Art

[0002] With the development of technology, microphones are used more and more widely in automobiles. In the existing technology, a straight-through hole is set on the surface of the vehicle body as a sound hole, and the microphone is set in the vehicle body. A waterproof film is attached to the microphone, and the microphone is connected to the outside of the vehicle body through the sound hole. However, with this structure, when the vehicle is in motion, the straight-through hole will cause the release of turbulent energy and generate strong wind noise, which will affect the microphone's sound reception; when washing the car or in rainy weather, when the water flow hits the vehicle body surface almost vertically, the gas in the sound hole is violently compressed, which can easily cause damage to the internal structure of the microphone; the waterproof membrane will also be directly impacted by the water flow and be damaged; in addition, water retained near the sound hole can easily cause blockage, and ice in cold weather can more easily cause the external sound pickup function to fail; moreover, when washing the car with hot water, water vapor will penetrate the waterproof membrane and condense in the internal channel, making it difficult to discharge. Technical issues

[0003] Therefore, it is necessary to provide a new waterproof microphone device to solve the above technical problems. Technical Solutions

[0004] The purpose of the utility model is to provide a waterproof microphone device with a stable structure and good waterproof effect.

[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a waterproof microphone device, which is installed on a vehicle body, and the vehicle body includes a frame with a circular opening, the waterproof microphone device includes a shell, a circuit board arranged in the shell, a microphone installed on the circuit board, a cover connecting the shell and the frame, a first waterproof membrane sealed on the cover, and a mask fixed to the cover, the inner wall of the opening formed by the frame gradually tilts inward from the outer surface to the inner surface of the frame, the mask includes a first wall facing the outside of the vehicle body, a second wall opposite to the first wall, and an outer wall connecting the first wall and the second wall, the outer wall gradually tilts inward from the first wall to the second wall, so that an inclined annular sound inlet channel is formed between the inner wall of the opening of the frame and the outer wall of the mask.

[0006] Preferably, the mask includes a recessed portion extending from the second wall of the mask to the outer side wall.

[0007] Preferably, there are multiple recessed portions, and the multiple recessed portions are arranged on the outer side wall at equal intervals.

[0008] Preferably, the cover plate includes a main body portion covering the outer shell and a protrusion provided on the main body portion, the protrusion portion is provided with a receiving groove communicating with the sound inlet channel, and the main body portion is provided with a first through hole communicating with the receiving groove.

[0009] Preferably, the receiving groove includes a central portion and at least three extending portions extending outward from the central portion, and the first through hole is arranged relative to one of the extending portions.

[0010] Preferably, the receiving groove is T-shaped, Y-shaped, cross-shaped or flower-shaped.

[0011] Preferably, the walls of the receiving groove formed by the protrusions are all arc-shaped structures.

[0012] Preferably, the waterproof microphone device further includes a sealing ring arranged between the cover plate and the circuit board and a second waterproof membrane arranged between the sealing ring and the main body of the cover plate, and the sealing ring is provided with a second through hole communicating with the first through hole of the cover plate.

[0013] Preferably, the circuit board is provided with a third through hole communicating with the second through hole, and the microphone is provided on the lower surface of the circuit board.

[0014] Preferably, the cover plate is provided with a mounting post extending from the protrusion, and the mounting post passes through the first waterproof membrane and is fixedly connected to the mask. Beneficial effects

[0015] Compared with the related art, the waterproof microphone device provided by the present invention is installed on a vehicle body, and the vehicle body includes a frame with a circular opening. The waterproof microphone device includes a shell, a circuit board arranged in the shell, a microphone installed on the circuit board, a cover connecting the shell and the frame, a first waterproof membrane sealed on the cover, and a mask fixed to the cover. The inner wall of the opening formed by the frame gradually tilts inward from the outer surface to the inner surface of the frame. The mask includes a first wall facing the outside of the vehicle body, a second wall opposite to the first wall, and an outer wall connecting the first wall and the second wall. The outer wall gradually tilts inward from the first wall to the second wall, so that an inclined annular sound inlet channel is formed between the inner wall of the opening of the frame and the outer wall of the mask. When the car is driving, the airflow of the waterproof microphone device of the present invention flows along the inclined annular sound inlet channel, the turbulent energy is smaller, and the wind noise is lower; when washing the car or in rainy weather, the air pressure generated by the impact of the water flow enters from one end of the receiving groove and is released from the other end of the receiving groove, avoiding damage to the inside of the microphone; the water flows along the inclined annular sound inlet channel, reducing the impact on the first waterproof membrane and extending its service life; the retained liquid can flow out in any direction along the inclined annular sound inlet channel, and it is not easy to cause water accumulation; when the vehicle is driving, the gas in the receiving groove continues to flow, promoting the evaporation and discharge of condensed water, and it is not easy to cause water accumulation; at the same time, the waterproof microphone device of the present invention has a more beautiful appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of the three-dimensional structure of a waterproof microphone device of the present invention;

[0017] FIG2 is a partially exploded view of the waterproof microphone device shown in FIG1 ;

[0018] FIG3 is an exploded view of the waterproof microphone device shown in FIG1 ;

[0019] FIG4 is an exploded view of the waterproof microphone device shown in FIG1 from another angle;

[0020] FIG. 5 is a cross-sectional view of the waterproof microphone device shown in FIG. 1 along line AA. Best Mode for Carrying Out the Invention

[0021] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Referring to Figures 1-5 , the present invention provides a waterproof microphone device 100, which is mounted on a vehicle body 200. The vehicle body 200 includes a frame 202 with a circular opening 201. The waterproof microphone device 100 comprises a housing 1, a circuit board 2 disposed within the housing 1, a microphone 3 mounted on the circuit board 2, a cover 4 connecting the housing 1 and the frame 202, a first waterproof membrane 5 sealed against the cover 4, a mask 6 secured to the cover 4, a sealing ring 7 disposed between the cover 4 and the circuit board 2, a second waterproof membrane 8 disposed between the sealing ring 7 and the cover 4, and a connector pin 9. The housing 1, circuit board 2, microphone 3, cover 4, first waterproof membrane 5, sealing ring 7, second waterproof membrane 8, and connector pin 9 are all disposed within the vehicle body 200. The waterproof microphone device 100 can be mounted on the vehicle body 200 near a door, a headlight, or other location within the vehicle.

[0023] The inner wall 2021 of the opening 201 formed by the frame 202 gradually tilts inward from the outer surface 2022 to the inner surface 2023 of the frame 202, that is, the aperture of the opening 201 gradually decreases from the outer surface 2022 to the inner surface 2023. Since the opening 201 is circular or elliptical, the inner wall 2021 is a smooth arc-shaped slope.

[0024] The mask 6 is circular or elliptical in shape, corresponding to the opening 201. The mask 6 includes a first wall 61 facing the outside of the vehicle body 200, a second wall 62 opposite the first wall 61, and an outer wall 63 connecting the first wall 61 and the second wall 62. The first wall 61 of the mask 6 is flush with the outer surface 2022 of the frame 202, and the outer wall 63 gradually slopes inward from the first wall 61 to the second wall 62, forming an inclined annular sound inlet channel 60 between the inner wall 2021 of the opening 201 of the frame 202 and the outer wall 63 of the mask 6. With this arrangement, when the vehicle is driving, air flows along the annular sound inlet channel 60, resulting in less turbulent energy and lower wind noise.

[0025] The mask 6 includes a recessed portion 64 extending from the second wall 62 of the mask 6 to the outer wall 63. The recessed portion 64 does not extend to the first wall 61 of the mask 6. There are multiple recessed portions 64, and multiple recessed portions 64 are arranged at equal intervals on the outer wall 63. The surface forming the recessed portion 64 is also a smooth curved surface. The setting of the recessed portion 64 ensures sufficient width of the sound inlet channel 60 and reduces high-frequency resonance.

[0026] The housing 1 is formed into a first receiving portion 11 for accommodating the circuit board 2, microphone 3, sealing ring 7, and second waterproof membrane 8, and a second receiving portion 12 separated from the first receiving portion 11. The housing 1 includes a retaining wall 13 separating the first receiving portion 11 from the second receiving portion 12. One end of the connector pin 9 is electrically connected to the circuit board 2, and the other end extends into the second receiving portion 12.

[0027] The circuit board 2 is supported on the inner wall of the housing 1, and the microphone 3 is provided on the lower surface of the circuit board 2. The microphone 3 is a MEMS microphone or other microphones.

[0028] The cover plate 4 and the first waterproof membrane 5 cover the housing 1 and seal the first receiving portion 11. The cover plate 4 includes a main body 41 that covers the housing 1 and a protrusion 42 disposed on the main body 41. The main body 41 is generally rectangular, and the protrusion 42 is generally circular. The protrusion 42 defines a receiving groove 421 that communicates with the sound inlet channel 60. The main body 41 defines a first through-hole 411 that communicates with the receiving groove 421. The receiving groove 421 includes a central portion 4211 and at least three extensions 4212 extending outward from the central portion 4211. The first through-hole 411 is disposed relative to one of the extensions 4212. The receiving groove 421 is T-shaped, Y-shaped, cross-shaped, or flower-shaped. Specifically, the central portion 4211 and the extensions 4212 form a T-shaped, Y-shaped, cross-shaped, or flower-shaped structure, and the walls of the protrusion 42 that form the receiving groove 421 are all arc-shaped. When washing the car or on rainy days, water flows into the receiving groove 421 from an extension 4212, and the generated air pressure is released from another extension 4212 of the receiving groove 421, thereby avoiding damage to the inside of the microphone 3; at the same time, the water flows along the annular sound inlet channel 60, reducing the impact on the first waterproof membrane 5; since the water in the annular hole is unstable and can easily escape under the push of airflow or gravity, the residual liquid in the receiving groove 421 can also flow out in any direction of the annular sound inlet channel 60, thereby avoiding liquid retention; when the vehicle is driving, the gas in the annular sound inlet channel 60 continues to flow, promoting the evaporation and discharge of condensed water, and also avoiding liquid retention from another aspect.

[0029] The cover plate 4 is provided with a plurality of mounting posts 43 extending from the protrusion 42. The mounting posts 43 penetrate the first waterproof membrane 5 and are fixedly connected to the mask 6, thereby achieving a fixed installation of the mask 6. A mounting groove 412 is provided on the side of the main body 41 of the cover plate 4 away from the protrusion 42, which is connected to the first through hole 411. The sealing ring 7 is installed in the mounting groove 412.

[0030] The sealing ring 7 is provided with a second through hole 71 communicating with the first through hole 411 of the cover plate 4. The second waterproof membrane 8 is provided between the second through hole 71 of the sealing ring 7 and the first through hole 411 of the cover plate 4.

[0031] The circuit board 2 is provided with a third through hole 21 connected to the second through hole 71. The sound collection process is as follows: the sound enters the sound inlet channel 60, passes through the receiving groove 421, the first through hole 411, the second through hole 71, the third through hole 21, and finally reaches the microphone 3.

[0032] Compared with the related art, the waterproof microphone device provided by the present invention is installed on a vehicle body, and the vehicle body includes a frame with a circular opening. The waterproof microphone device includes a shell, a circuit board arranged in the shell, a microphone installed on the circuit board, a cover connecting the shell and the frame, a first waterproof membrane sealed on the cover, and a mask fixed to the cover. The inner wall of the opening formed by the frame gradually tilts inward from the outer surface to the inner surface of the frame. The mask includes a first wall facing the outside of the vehicle body, a second wall opposite to the first wall, and an outer wall connecting the first wall and the second wall. The outer wall gradually tilts inward from the first wall to the second wall, so that an inclined annular sound inlet channel is formed between the inner wall of the opening of the frame and the outer wall of the mask. When the car is driving, the airflow of the waterproof microphone device of the present invention flows along the inclined annular sound inlet channel, the turbulent energy is smaller, and the wind noise is lower; when washing the car or in rainy weather, the air pressure generated by the impact of the water flow enters from one end of the receiving groove and is released from the other end of the receiving groove, avoiding damage to the inside of the microphone; the water flows along the inclined annular sound inlet channel, reducing the impact on the first waterproof membrane and extending its service life; the retained liquid can flow out in any direction along the inclined annular sound inlet channel, and it is not easy to cause water accumulation; when the vehicle is driving, the gas in the receiving groove continues to flow, promoting the evaporation and discharge of condensed water, and it is not easy to cause water accumulation; at the same time, the waterproof microphone device of the present invention has a more beautiful appearance.

[0033] The above is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the scope of protection of the present invention.

Claims

1. A waterproof microphone device, characterized in that: The waterproof microphone device is installed on a vehicle body, and the vehicle body includes a frame with a circular opening. The waterproof microphone device includes a shell, a circuit board arranged in the shell, a microphone installed on the circuit board, a cover connecting the shell and the frame, a first waterproof membrane sealed on the cover, and a mask fixed to the cover. The inner wall of the opening formed by the frame gradually tilts inward from the outer surface to the inner surface of the frame. The mask includes a first wall facing the outside of the vehicle body, a second wall opposite to the first wall, and an outer wall connecting the first wall and the second wall. The outer wall gradually tilts inward from the first wall to the second wall, so that an inclined annular sound inlet channel is formed between the inner wall of the opening of the frame and the outer wall of the mask.

2. The waterproof microphone device according to claim 1, wherein: The face mask includes a recessed portion extending from the second wall of the face mask to the outer side wall.

3. The waterproof microphone device according to claim 2, characterized in that: There are multiple recessed portions, and the multiple recessed portions are arranged on the outer side wall at equal intervals.

4. The waterproof microphone device according to claim 1, wherein: The cover plate includes a main body portion covering the outer shell and a protrusion portion provided on the main body portion, the protrusion portion is provided with a receiving groove communicating with the sound inlet channel, and the main body portion is provided with a first through hole communicating with the receiving groove.

5. The waterproof microphone device according to claim 4, characterized in that: The receiving groove includes a central portion and at least three extending portions extending outward from the central portion, and the first through hole is arranged relative to one of the extending portions.

6. The waterproof microphone device according to claim 5, characterized in that: The receiving groove is in a T-shape, a Y-shape, a cross-shape or a flower-shape.

7. The waterproof microphone device according to claim 5, characterized in that: The walls of the receiving groove formed by the protrusions are all arc-shaped structures.

8. The waterproof microphone device according to claim 4, wherein: The waterproof microphone device further includes a sealing ring disposed between the cover plate and the circuit board and a second waterproof membrane disposed between the sealing ring and the main body of the cover plate. The sealing ring is provided with a second through hole communicating with the first through hole of the cover plate.

9. The waterproof microphone device according to claim 8, characterized in that: The circuit board is provided with a third through hole communicating with the second through hole, and the microphone is provided on the lower surface of the circuit board.

10. The waterproof microphone device according to claim 4, characterized in that: The cover plate is provided with a mounting post extending from the protrusion, and the mounting post passes through the first waterproof membrane and is fixedly connected to the mask.

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