Anti-noise microphone

Abstract

The utility model discloses an anti-noise microphone, which comprises a shell and a circuit board assembly, the circuit board assembly is packaged at the open end of the shell, the circuit board assembly and the shell define an accommodating cavity, a capacitor assembly for converting sound signals into electric signals is arranged in the accommodating cavity, and one end of the shell far away from the circuit board assembly is provided with a sound hole; a gap is formed between the capacitor assembly and the inner wall of the shell, an adjusting piece is arranged between the side, back on to the circuit board assembly, of the capacitor assembly and the shell, the adjusting piece is provided with an air hole and an adjusting groove, the air hole communicates with the sound hole and the sound cavity of the capacitor assembly, and the adjusting groove communicates with the gap and the sound cavity of the capacitor assembly. A pressure relief groove is formed between the side, facing the circuit board assembly, of the capacitor assembly and the circuit board assembly. The pressure relief groove is communicated with the gap and the interior of the capacitor assembly. Therefore, pressure adjustment and pressure relief can be effectively carried out, the purpose of noise reduction is achieved, and the noise-proof effect that voice communication is clear in the high-speed motion environment is achieved.

Description

Technical Field

[0001] The utility model relates to the technology of microphone field, in particular to an anti-noise microphone. Background Art

[0002] With the vigorous development of 3C electronic products, the acoustic sensors have higher and higher requirements for sound conversion performance. Especially when using various electronic products, the requirements for acoustic characteristics are even more stringent.

[0003] The conventional electret microphone in the prior art is composed of a terminal board assembly, a cavity, a pole ring, a back plate, a gasket, a diaphragm, a shell, and a dustproof net. The back plate, the gasket, and the diaphragm form a parallel plate capacitor. The electret charge on the back plate or the diaphragm changes the amplitude of the diaphragm when different sounds are excited, causing the capacitance of the capacitor to change, thereby realizing sound-to-electricity conversion. The signal is converted into impedance and amplified and output through a junction field effect transistor JFET, a PMOS tube, etc. Although it can meet general acoustic usage needs, it lacks a noise reduction structural design, resulting in the inability to achieve the purpose of noise reduction in some noisy environments. For example, when a customer is riding (such as a microphone in a motorcycle helmet), the greater the speed, the greater the wind noise. This high-decibel noise impact will be picked up and recorded by the microphone during a call, thereby covering up the normal voice signal, resulting in the inability to hear a clear normal voice signal.

[0004] Therefore, it is necessary to develop a new technology to solve the above problems. Utility Model Content

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a noise-canceling microphone that can effectively regulate and release pressure to achieve the purpose of noise reduction, thereby achieving a clear noise-canceling effect for voice calls in a high-speed motion environment.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An anti-noise microphone comprises a housing and a circuit board assembly, wherein the circuit board assembly is encapsulated at an open end of the housing, the circuit board assembly and the housing form a receiving cavity, a capacitor assembly for converting a sound signal into an electrical signal is arranged in the receiving cavity, and a sound hole is arranged at one end of the housing away from the circuit board assembly;

[0008] A gap is formed between the capacitor assembly and the inner wall of the shell, an adjustment member is arranged between the side of the capacitor assembly facing away from the circuit board assembly and the shell, the adjustment member has an air hole and an adjustment groove, the air hole is connected to the sound hole and the sound cavity of the capacitor assembly, the adjustment groove is connected to the gap and the sound cavity of the capacitor assembly, a pressure relief groove is arranged between the side of the capacitor assembly facing the circuit board assembly and the circuit board assembly, and the pressure relief groove is connected to the gap and the inside of the capacitor assembly.

[0009] As a preferred solution, the adjustment groove and the air vent are spaced apart from each other.

[0010] As a preferred solution, the adjustment groove is recessed inward from the peripheral side wall of the adjustment member, and a plurality of the adjustment grooves are provided, and the plurality of adjustment grooves are arranged around the center of the air vent at intervals in the circumferential direction on the periphery of the air vent.

[0011] As a preferred solution, the adjustment groove is connected to the air vent, and the adjustment groove is recessed inward from the peripheral side wall of the adjustment member.

[0012] As a preferred solution, the inner bottom wall of the shell is recessed downwardly with a channel; one end of the channel extends to the inner peripheral side wall of the shell, and the other end is connected to the sound hole; the channel is connected to the air vent, the adjustment groove and the gap.

[0013] As a preferred solution, the pressure relief groove is formed on one end of the circuit board assembly facing the capacitor assembly.

[0014] As a preferred solution, the circuit board assembly includes a PCB board, the PCB board is packaged in the open end of the shell, and the pressure relief groove is recessed upward from the lower end surface of the PCB board and passes through the peripheral side wall of the PCB board.

[0015] As a preferred embodiment, the capacitor assembly includes a vibration component, a gasket, a back pole plate with a perforation, a back pole seat and a connecting ring, the lower end of the adjusting component abuts against the inner bottom wall of the outer shell, the lower end of the vibration component abuts against the upper end of the adjusting component, the lower end of the gasket abuts against the upper end of the vibration component, the lower end of the back pole seat abuts against the upper end of the gasket, the back pole plate is arranged in the back pole seat, the lower end of the back pole plate abuts against the upper end of the gasket, the lower end of the connecting ring extends into the back pole seat and abuts against the upper end of the back pole plate, and the upper end of the connecting ring extends upward out of the upper end of the back pole seat and abuts against the lower end of the circuit board assembly.

[0016] As a preferred solution, the pressure relief groove is recessed downward from the upper end surface of the connecting ring and passes through both inner and outer sides of the connecting ring.

[0017] As a preferred solution, a dustproof net is connected to the lower end of the shell, and the dustproof net has a plurality of through holes, and the through holes are connected to the sound holes.

[0018] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it mainly forms a gap between the capacitor assembly and the inner wall of the shell, so that an adjustment member is arranged between the side of the capacitor assembly facing away from the circuit board assembly and the shell, the adjustment member has an air hole and an adjustment groove, and the air hole is connected to the sound hole and the sound cavity of the capacitor assembly, the adjustment groove is connected to the gap and the sound cavity of the capacitor assembly, and a pressure relief groove is arranged between the side of the capacitor assembly facing the circuit board assembly and the circuit board assembly, and the pressure relief groove is connected to the gap and the inside of the capacitor assembly. In this way, through the combined design of the adjustment member and the pressure relief groove, air can be conducted between the sound hole, the air hole, the adjustment groove, the gap, the sound cavity, and the pressure relief groove. In this way, pressure regulation and pressure relief can be effectively performed to achieve the purpose of noise reduction, thereby realizing the anti-noise effect of clear voice calls in a high-speed motion environment.

[0019] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the first embodiment of the utility model;

[0021] Figure 2 This is a three-dimensional schematic diagram of the overall structure of the first embodiment of the utility model from another angle;

[0022] Figure 3 It is an exploded schematic diagram of the first embodiment of the utility model;

[0023] Figure 4 This is another exploded schematic diagram of the first embodiment of the present utility model;

[0024] Figure 5 It is a cross-sectional schematic diagram of the first embodiment of the utility model;

[0025] Figure 6 It is an exploded schematic diagram of the second embodiment of the utility model;

[0026] Figure 7 This is another exploded schematic diagram of the second embodiment of the present utility model;

[0027] Figure 8 It is a cross-sectional schematic diagram of the second embodiment of the present utility model.

[0028] Description of the accompanying drawings:

[0029] 10. Shell 11. Sound hole

[0030] 12. Dust screen 121. Through hole

[0031] 13. Gap 14. Channel

[0032] 20. Circuit board assembly 21. PCB board

[0033] 30. Adjustment part 31. Ventilation hole

[0034] 32. Adjustment slot 40. Vibration component

[0035] 41. Vibrating membrane 42. Fixed ring

[0036] 50, gasket 60, back plate

[0037] 61, perforation 70, back pole seat

[0038] 80, connecting ring 101, vocal cavity

[0039] 102. Pressure relief groove 103. Front cavity. DETAILED DESCRIPTION

[0040] Please refer to Figures 1 to 8 As shown, it shows the specific structure of two embodiments of the utility model; wherein, Figures 1 to 5 The specific structure of the first embodiment is shown. Figures 6 to 8 The specific structure of the second embodiment is shown.

[0041] like Figures 1 to 5 As shown, in embodiment 1, a noise-cancelling microphone includes a housing 10 and a circuit board assembly 20, wherein the circuit board assembly 20 is encapsulated at the open end of the upper end of the housing 10, and the circuit board assembly 20 and the housing 10 form a accommodating cavity, wherein a capacitor assembly for converting a sound signal into an electrical signal is arranged in the accommodating cavity, and a sound hole 11 is arranged at one end of the housing 10 away from the circuit board assembly 20; a dustproof net 12 is connected to the lower end of the housing 10, and the dustproof net 12 is in a circular structure, and the dustproof net 12 has a plurality of through holes 121, and the through holes 121 are connected to the sound hole 11, so as to achieve the purpose of dust prevention through the dustproof net 12.

[0042] like Figures 3 to 5As shown, in the first embodiment, a gap 13 is formed between the capacitor assembly and the inner wall of the housing 10, and an adjusting member 30 is arranged between the side of the capacitor assembly facing away from the circuit board assembly 20 and the housing 10, and the adjusting member 30 has an air hole 31 and an adjusting groove 32, the air hole 31 is connected to the sound hole 11 and the sound cavity 101 of the capacitor assembly, and the adjusting groove 32 is connected to the gap 13 and the sound cavity 101 of the capacitor assembly, and a pressure relief groove 102 is arranged between the side of the capacitor assembly facing the circuit board assembly 20 and the circuit board assembly 20, and the pressure relief groove 102 is connected to the gap 13 and the inside of the capacitor assembly. In this way, through the combined design of the adjusting member 30 and the pressure relief groove 102, air can be conducted between the sound hole 11, the air hole 31, the adjusting groove 32, the gap 13, the sound cavity 101, and the pressure relief groove 102, so that pressure regulation and pressure relief can be effectively performed to achieve the purpose of noise reduction, thereby achieving a clear anti-noise effect for voice calls in a high-speed motion environment.

[0043] like Figures 3 to 5 As shown, in the first embodiment, the adjustment groove 32 is spaced apart from the air hole 31. The adjustment groove 32 is recessed inward from the peripheral side wall of the adjustment member 30, and a plurality of the adjustment grooves 32 are provided, and the plurality of adjustment grooves 32 are arranged in the periphery of the air hole 31 in a circumferential direction around the center of the air hole 31 at uniform intervals. In addition, the adjustment member 30 is a circular sheet structure, the air hole 31 is provided at the center of the adjustment member 30, the air hole 31 coincides with the axis of the sound hole 11, and the diameter of the air hole 31 is greater than the diameter of the sound hole 11.

[0044] like Figure 5 As shown, in the first embodiment, the inner bottom wall of the shell 10 is recessed downwardly with a channel 14; one end of the channel 14 extends to the inner peripheral side wall of the shell 10, and the other end is connected to the sound hole 11; the channel 14 is connected to the air hole 31, the adjustment groove 32 and the gap 13, and the channel 14 serves the purpose of auxiliary adjustment.

[0045] like Figures 3 to 5 As shown, in the first embodiment, the pressure relief groove 102 is formed on one end of the circuit board assembly 20 facing the capacitor assembly. Specifically, the circuit board assembly 20 includes a PCB board 21, and the PCB board 21 is encapsulated in the open end of the housing 10. Preferably, the upper open end of the housing 10 is curled and closed at the upper end of the PCB board 21. Of course, the upper open end of the housing 10 can also be bonded to the lower end of the PCB board 21; the pressure relief groove 102 is recessed upward from the lower end of the PCB board 21 and passes through the peripheral side wall of the PCB board 21. And, the lower end of the PCB board 21 is connected with a field effect transistor and a capacitor.

[0046] like Figures 3 to 5As shown, in the first embodiment, the capacitor assembly includes a vibration component 40, a gasket 50, a back plate 60 with a perforation 61, a back plate seat 70 and a connecting ring 80, the housing 10, the PCB board 21, the vibration component 40, the gasket 50, the back plate 60, the back plate seat 70 and the connecting ring 80 are all circular structures, and the gasket 50, the back plate seat 70 and the connecting ring 80 are all annular structures; the lower end of the adjusting member 30 abuts against the inner bottom wall of the housing 10, and the vibration component 40 The lower end abuts against the upper end of the adjusting member 30, the lower end of the gasket 50 abuts against the upper end of the vibration member 40, the lower end of the back pole seat 70 abuts against the upper end of the gasket 50, the back pole plate 60 is arranged in the back pole seat 70, the lower end of the back pole plate 60 abuts against the upper end of the gasket 50, the lower end of the connecting ring 80 extends into the back pole seat 70 and abuts against the upper end of the back pole plate 60, and the upper end of the connecting ring 80 extends upward out of the upper end of the back pole seat 70 and abuts against the lower end of the circuit board assembly 20. Specifically, the upper end of the connecting ring 80 abuts against the lower end of the PCB board 21; the gap 13 is formed between the outer peripheral side wall of the PCB board 21, the back pole seat 70, the gasket 50, the vibration member 40 and the inner peripheral side wall of the housing 10.

[0047] like Figures 3 to 5 As shown, in Example 1, a front cavity 103 of the capacitor assembly located in the connecting ring 80 is formed between the connecting ring 80 and the back plate 60, the pressure relief groove 102 is connected to the front cavity 103, and the field effect transistor and the capacitor extend into the front cavity 103; the vibration component 40 is a diaphragm group, and the diaphragm group includes a vibration membrane 41 and a fixed ring 42 made of a metal material, the vibration membrane 41 is fixedly connected to the upper end of the fixed ring 42, the lower end of the fixed ring 42 abuts against the upper end of the adjusting member 30, and the lower end of the gasket 50 abuts against the upper end of the vibration membrane 41, and a sound cavity 101 of the capacitor assembly located in the fixing ring 42 is formed between the fixing ring 42 and the vibration membrane 41, and the front cavity 103 is connected to the sound cavity 101 through the through hole 61 on the back plate 60.

[0048] like Figures 6 to 8 As shown, the specific structure of Example 2 is shown. Example 2 has the same basic structure as Example 1, and the difference between Example 2 and Example 1 is that: in Example 2, the pressure relief groove 102 is arranged on the connecting ring 80, and the pressure relief groove 102 is recessed downward from the upper end surface of the connecting ring 80 and passes through the inner and outer sides of the connecting ring 80, and one adjustment groove 32 is provided, and the adjustment groove 32 is connected to the air vent 31.

[0049] To sum up, the design focus of the utility model is that it mainly forms a gap between the capacitor assembly and the inner wall of the shell, so that an adjusting piece is arranged between the side of the capacitor assembly facing away from the circuit board assembly and the shell, the adjusting piece has an air hole and an adjusting groove, and the air hole is connected to the sound hole and the sound cavity of the capacitor assembly, the adjusting groove is connected to the gap and the sound cavity of the capacitor assembly, and a pressure relief groove is arranged between the side of the capacitor assembly facing the circuit board assembly and the circuit board assembly, and the pressure relief groove is connected to the gap and the inside of the capacitor assembly. In this way, through the combined design of the adjusting piece and the pressure relief groove, air can be conducted between the sound hole, the air hole, the adjusting groove, the gap, the sound cavity, and the pressure relief groove. In this way, pressure regulation and pressure relief can be effectively performed to achieve the purpose of noise reduction, thereby realizing the anti-noise effect of clear voice calls in a high-speed motion environment.

[0050] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An anti-noise microphone, comprising a housing and a circuit board assembly, wherein the circuit board assembly is enclosed in an open end of the housing, the circuit board assembly and the housing form a receiving cavity, a capacitor assembly for converting a sound signal into an electrical signal is arranged in the receiving cavity, and a sound hole is arranged at one end of the housing away from the circuit board assembly; characterized in that: A gap is formed between the capacitor assembly and the inner wall of the shell, an adjustment member is arranged between the side of the capacitor assembly facing away from the circuit board assembly and the shell, the adjustment member has an air hole and an adjustment groove, the air hole is connected to the sound hole and the sound cavity of the capacitor assembly, the adjustment groove is connected to the gap and the sound cavity of the capacitor assembly, a pressure relief groove is arranged between the side of the capacitor assembly facing the circuit board assembly and the circuit board assembly, and the pressure relief groove is connected to the gap and the inside of the capacitor assembly.

2. The anti-noise microphone according to claim 1, characterized in that: The adjustment groove and the air vent are arranged at intervals.

3. The anti-noise microphone according to claim 2, characterized in that: The adjusting groove is recessed inward from the peripheral side wall of the adjusting member, and a plurality of the adjusting grooves are provided. The plurality of adjusting grooves are arranged around the center of the air vent at intervals in the circumferential direction on the periphery of the air vent.

4. The anti-noise microphone according to claim 1, characterized in that: The adjusting groove is connected to the air vent, and the adjusting groove is recessed inward from the peripheral side wall of the adjusting member.

5. The anti-noise microphone according to claim 1, characterized in that: The inner bottom wall of the shell is concavely provided with a channel; one end of the channel extends to the inner peripheral side wall of the shell, and the other end is connected to the sound hole; the channel is connected to the air vent, the adjustment groove and the gap.

6. The anti-noise microphone according to claim 1, characterized in that: The pressure relief groove is formed on one end of the circuit board assembly facing the capacitor assembly.

7. The anti-noise microphone according to claim 6, characterized in that: The circuit board assembly comprises a PCB board, and the PCB board is packaged at the opening end of the shell. The pressure relief groove is recessed upward from the lower end surface of the PCB board and passes through the peripheral side wall of the PCB board.

8. The anti-noise microphone according to claim 1, characterized in that: The capacitor assembly includes a vibration component, a gasket, a back pole plate with a perforation, a back pole seat and a connecting ring, the lower end of the adjusting component abuts against the inner bottom wall of the outer shell, the lower end of the vibration component abuts against the upper end of the adjusting component, the lower end of the gasket abuts against the upper end of the vibration component, the lower end of the back pole seat abuts against the upper end of the gasket, the back pole plate is arranged in the back pole seat, the lower end of the back pole plate abuts against the upper end of the gasket, the lower end of the connecting ring extends into the back pole seat and abuts against the upper end of the back pole plate, and the upper end of the connecting ring extends upward from the upper end of the back pole seat and abuts against the lower end of the circuit board assembly.

9. The anti-noise microphone according to claim 8, characterized in that: The pressure relief groove is recessed downward from the upper end surface of the connecting ring and passes through both inner and outer sides of the connecting ring.

10. The anti-noise microphone according to claim 1, characterized in that: The lower end of the shell is connected with a dustproof net, and the dustproof net has a plurality of through holes, and the through holes are connected to the sound holes.

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