Waterproof microphone

Abstract

The utility model provides a waterproof microphone, which comprises a packaging structure composed of a substrate, a PCB (printed circuit board) and a shell used for connecting the substrate and the PCB, a laser transmitter is arranged in the packaging structure, a sound hole is arranged on the PCB, and a waterproof vibrating membrane is arranged on the PCB corresponding to the sound hole; wherein the waterproof vibration film comprises a PET film, and an oil-proof coating and a reflective coating which are respectively arranged at two sides of the PET film, and the reflective coating faces the laser emitter and is used for reflecting an optical signal emitted by the laser emitter. According to the utility model, the problem that the performance of the microphone is reduced due to the waterproof membrane of the existing waterproof microphone can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of microphones, and more specifically, to a waterproof microphone. Background Art

[0002] Current waterproof microphones have a waterproof membrane at the sound hole of the microphone to prevent water from entering the microphone and damaging the diaphragm. Sound can enter the microphone through the waterproof membrane and reach the diaphragm, causing the diaphragm to vibrate, thereby receiving sound signals.

[0003] The current waterproof membrane is generally made of sound-permeable hydrophobic mesh material. In a non-aqueous environment, the waterproof membrane has a certain acoustic resistance, which will weaken the sound signal transmitted to the microphone, resulting in reduced performance such as the sensitivity of the microphone. When the microphone is in water, the waterproof membrane separates the water and the microphone, and the sound vibration in the water cannot be effectively transmitted to the inside of the microphone, resulting in reduced performance of the microphone in water, or even failure to work properly. Utility Model Content

[0004] In view of the above problems, an object of the present invention is to provide a waterproof microphone to solve the problem that the waterproof membrane of the existing waterproof microphone causes the microphone performance to deteriorate.

[0005] The utility model provides a waterproof microphone, comprising a packaging structure consisting of a substrate, a PCB board and a shell for connecting the substrate and the PCB board, wherein a laser transmitter is arranged inside the packaging structure, and a sound hole is arranged on the PCB board, wherein:

[0006] A waterproof vibration membrane is provided on the PCB board corresponding to the sound hole; wherein,

[0007] The waterproof vibration membrane includes a PET film and an oil-proof coating and a reflective coating respectively arranged on both sides of the PET film. The reflective coating faces the laser emitter and is used to reflect the optical signal emitted by the laser emitter.

[0008] In addition, a preferred structure is that the PET film is a membrane-like non-porous structure for preventing external water from entering the interior of the microphone.

[0009] In addition, a preferred structure is that the oil-proof coating is used to protect the PET film and is connected to the outside.

[0010] In addition, a preferred structure is that the waterproof vibration membrane is arranged on the inner side of the PCB board facing the packaging structure.

[0011] In addition, a preferred structure is that the waterproof vibration membrane is arranged on the outer side of the PCB board facing the packaging structure.

[0012] In addition, a preferred structure is that the waterproof vibration membrane is arranged in the middle of the PCB board.

[0013] In addition, a preferred structure is that the substrate is arranged opposite to the PCB board, a laser receiver and a signal processor are arranged on the substrate inside the packaging structure, and the laser transmitter is arranged on the laser receiver; wherein,

[0014] The laser receiver is used to receive the optical signal emitted by the laser transmitter and transmit the received optical signal to the signal processor;

[0015] A signal processor is used to convert the optical signal into an electrical signal.

[0016] In addition, a preferred structure is that the signal processor is electrically connected to the laser transmitter and the laser receiver respectively through gold wires.

[0017] In addition, a preferred structure is that a pad is provided on a substrate outside the packaging structure, and the substrate is electrically connected to an external device via the pad.

[0018] In addition, a preferred structure is that the shell is bonded and fixed to the PCB board and the substrate by an adhesive, wherein the adhesive is solder paste or conductive glue.

[0019] As can be seen from the above technical solution, the waterproof microphone provided by the utility model is provided with a waterproof vibration membrane at the position of the sound hole. The waterproof vibration membrane is a combination of the vibration membrane of a traditional microphone and a waterproof membrane. The waterproof vibration membrane transmits signals only by vibration, has no sound resistance, does not weaken the sound signal, and thus does not reduce the performance of the microphone. When the product is in water, the water is in direct contact with the waterproof vibration membrane, and the sound signal in the water directly acts on the waterproof vibration membrane to cause vibration, thereby converting the optical signal into an electrical signal, and finally outputting the sensitivity. The product can be used normally when in water, thereby solving the problem that the waterproof membrane of the existing waterproof microphone causes the microphone performance to be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other purposes and results of the present invention will become more clear and easy to understand. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the cross-sectional structure of a waterproof microphone according to an embodiment of the utility model;

[0022] Figure 2 is a schematic cross-sectional structure diagram of a waterproof diaphragm according to an embodiment of the utility model;

[0023] Figure 3 , Figure 4 , Figure 5 They are schematic diagrams of the relative position structures of the waterproof diaphragm and the PCB according to embodiments of the present utility model.

[0024] The reference numerals therein include: 1. waterproof vibration membrane, 2. sound hole, 3. PCB board, 4. laser receiver, 5. laser transmitter, 6. signal processor, 7. gold wire, 8. soldering pad, 9. substrate, 10. housing, 11. oil-proof coating, 12. PET film, 13. reflective coating.

[0025] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0026] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In view of the aforementioned problem that the waterproof membrane of the existing waterproof microphone causes the microphone performance to deteriorate, the utility model provides a new waterproof microphone.

[0029] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] In order to illustrate the structure of the waterproof microphone provided by the utility model, Figures 1 to 5 The structure of the waterproof microphone is exemplarily indicated from different angles. Specifically, Figure 1 The cross-sectional structure of a waterproof microphone according to an embodiment of the utility model is shown; Figure 2 The cross-sectional structure of the waterproof diaphragm according to the embodiment of the utility model is shown; Figure 3 , Figure 4 , Figure 5 The relative position structures of the waterproof diaphragm and the PCB according to the embodiments of the utility model are respectively shown.

[0031] like Figures 1 to 5 As shown together, the waterproof microphone provided by the utility model includes a packaging structure composed of a substrate 9, a PCB board 3 and a shell for connecting the substrate 9 and the PCB board 3, wherein a laser emitter 5 is arranged inside the packaging structure, and a sound hole 2 is arranged on the PCB board 3, wherein a waterproof vibration membrane 1 is arranged on the PCB board 3 corresponding to the sound hole 2.

[0032] like Figure 1 and Figure 2 As shown, the waterproof vibration membrane 1 includes an oil-proof coating 11, a PET film 12 and a reflective coating 13, wherein the oil-proof coating 11 and the reflective coating 13 are respectively arranged on both sides of the PET film 12, the reflective coating 13 faces the interior of the packaging structure, and the oil-proof coating 11 faces the outside and is in direct contact with the outside.

[0033] Specifically, the waterproof vibration membrane 1 is based on a PET (Polyethyleneterephthalate, PET for short) film, and an oil-proof coating 11 is applied on one side of the PET film 12, and a reflective coating 13 is plated on the other side of the PET film 12. The reflective coating 13 faces the laser emitter 5, acts as a mirror, and is used to reflect the light signal emitted by the laser emitter 5. The PET film 12 is a membrane-like non-porous structure, which is used to prevent external water from entering the interior of the microphone, thereby playing a waterproof role. The oil-proof coating 13 is used to protect the PET film 12.

[0034] The waterproof vibration membrane 1 of the utility model combines the vibration membrane of a traditional microphone with a waterproof membrane. The waterproof vibration membrane 1 transmits signals only by vibration, has no acoustic resistance, does not weaken the sound signal, and thus does not reduce the performance of the microphone.

[0035] In the embodiment of the present invention, the relative positions of the waterproof vibration membrane 1 and the PCB board 3 are not fixed. Figures 3 to 5 The structural relationship of three different positions is shown. Figure 3 In the embodiment shown, the waterproof vibration membrane 1 is arranged on the side of the PCB board 2 facing the outside of the packaging structure, covering the sound hole 2; at the same time, the reflective coating 13 faces the inside of the packaging structure, and the oil-proof coating 11 faces the outside and is in direct contact with the outside. Figure 4 In the embodiment shown, the waterproof vibration membrane 1 is arranged in the middle of the PCB board 3; at the same time, the reflective coating 13 faces the inside of the packaging structure, and the oil-proof coating 11 faces the outside and is in direct contact with the outside. Figure 5In the illustrated embodiment, the waterproof vibration membrane 1 is arranged on the inner side of the PCB board 3 facing the inner side of the packaging structure; at the same time, the reflective coating 13 faces the inner side of the packaging structure, and the oil-proof coating 11 faces the outer side and is in direct contact with the outside.

[0036] Figures 3 to 5 Although the relative positions of the waterproof vibration membrane 1 and the PCB board 3 are different, the three embodiments all satisfy the internal position relationship of the reflective coating 13 and the oil-proof coating 11 with the packaging structure, that is, the reflective coating 13 faces the inside of the packaging structure, and the oil-proof coating 11 faces the outside and is in direct contact with the outside. In specific applications, the waterproof vibration membrane 1 can be located at different positions of the PCB board 3 and is suitable for different waterproof microphone structure applications, as long as the reflective coating 13 faces the laser emitter 5, faces the inside of the packaging structure, and the oil-proof coating 11 faces the outside.

[0037] In addition, in an embodiment of the utility model, the substrate 9 is arranged opposite to the PCB board 3 , a laser receiver 4 and a signal processor 6 are arranged on the substrate 9 inside the packaging structure, and the laser transmitter 5 is arranged on the laser receiver 4 .

[0038] The laser receiver 4 is used to receive the optical signal emitted by the laser transmitter 5 and transmit the received optical signal to the signal processor 6; the signal processor 6 is used to convert the optical signal into an electrical signal. In addition, the signal processor 6 is electrically connected to the laser transmitter 5 and the laser receiver 4 through gold wires 7, respectively.

[0039] In an embodiment of the utility model, the shell 10 is bonded and fixed to the PCB board 3 and the substrate 9 by an adhesive, wherein the adhesive is silver paste, solder paste or conductive glue. Preferably, the adhesive is silver paste, and solder paste or conductive glue can also be selected. In actual application, according to needs, any one of silver paste, solder paste or epoxy glue is selected to bond the shell 10 to the PCB board 3 and the substrate 9.

[0040] Among them, the packaging structure is a cavity formed by the shell 10, the PCB board 3 and the substrate 9, and the cavity is electrically connected to the GND to form an equipotential shielding layer; that is, the shell 10 is bonded to the PCB board 3 and the substrate 9 by an adhesive to form an internal protective cavity, and is signal-connected to the GND to form an equipotential shielding layer, which can effectively reduce external electromagnetic interference.

[0041] In addition, a pad 8 is provided on a substrate 9 outside the packaging structure, and the substrate 9 is electrically connected to an external device through the pad 8 to transmit the converted electrical signal.

[0042] The working principle of the waterproof microphone of the utility model is:

[0043] Step 1: The external sound signal is transmitted to the waterproof vibration membrane 1, causing the waterproof vibration membrane 1 to vibrate;

[0044] Step 2: The laser transmitter 5 transmits an optical signal to the waterproof vibration membrane 1, and under the transmission effect of the waterproof vibration membrane 1, it is transmitted to the laser receiver 4;

[0045] Step 3: The signal received by the laser receiver 4 is transmitted to the signal processor 6, and the signal processor 6 converts the optical signal into an electrical signal;

[0046] Step 4: The signal processor 6 transmits the electrical signal to the substrate;

[0047] Step 5: Since the pads are provided on the substrate, the pads are electrically connected to the external devices, and the electrical signals are transmitted through the pads.

[0048] The above is the detailed working principle of the waterproof microphone provided by the utility model, and the electrical signal of the waterproof microphone is transmitted through the above process.

[0049] It can be seen from the above embodiments that the waterproof microphone provided by the utility model is provided with a waterproof vibration membrane at the position of the sound hole. The waterproof vibration membrane is a combination of the vibration membrane of a traditional microphone and a waterproof membrane. The waterproof vibration membrane transmits signals only by vibration, has no sound resistance, does not weaken the sound signal, and thus does not reduce the performance of the microphone. When the product is in water, the water is in direct contact with the waterproof vibration membrane, and the sound signal in the water directly acts on the waterproof vibration membrane to cause vibration, thereby converting the optical signal into an electrical signal, and finally outputting the sensitivity. The product can be used normally in water, thereby solving the problem that the waterproof membrane of the existing waterproof microphone causes the performance of the microphone to be reduced.

[0050] The waterproof microphone proposed according to the present invention is described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various improvements can be made to the waterproof microphone proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A waterproof microphone, comprising a packaging structure consisting of a substrate, a PCB board and a shell for connecting the substrate and the PCB board, wherein: A laser transmitter is arranged inside the packaging structure, and an acoustic hole is arranged on the PCB board, wherein: A waterproof vibration membrane is provided on the PCB board corresponding to the sound hole; wherein, The waterproof vibration membrane includes a PET film and an oil-proof coating and a reflective coating respectively arranged on both sides of the PET film. The reflective coating faces the laser emitter and is used to reflect the optical signal emitted by the laser emitter.

2. The waterproof microphone according to claim 1, characterized in that: The PET film is a membrane-like non-porous structure, which is used to prevent external water from entering the interior of the microphone.

3. The waterproof microphone according to claim 1, characterized in that: The oil-proof coating is used to protect the PET film and is connected to the outside.

4. The waterproof microphone according to claim 1, characterized in that: The waterproof vibration membrane is arranged on a side of the PCB board facing the interior of the packaging structure.

5. The waterproof microphone according to claim 1, characterized in that: The waterproof vibration membrane is arranged on a side of the PCB board facing the outside of the packaging structure.

6. The waterproof microphone according to claim 1, characterized in that: The waterproof vibration membrane is arranged in the middle of the PCB board.

7. The waterproof microphone according to claim 1, characterized in that: The substrate is arranged opposite to the PCB board, a laser receiver and a signal processor are arranged on the substrate inside the packaging structure, and the laser transmitter is arranged on the laser receiver; wherein, The laser receiver is used to receive the optical signal reflected by the reflective coating and transmit the received optical signal to the signal processor; A signal processor is used to convert the optical signal into an electrical signal.

8. The waterproof microphone according to claim 7, characterized in that: The signal processor is electrically connected to the laser transmitter and the laser receiver through gold wires respectively.

9. The waterproof microphone according to claim 1, wherein: A pad is provided on the substrate outside the packaging structure, and the substrate is electrically connected to an external device through the pad.

10. The waterproof microphone according to claim 1, characterized in that: The housing is bonded and fixed to the PCB board and the substrate by an adhesive, wherein: The adhesive is solder paste or conductive glue.

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