Unidirectional electret condenser microphone
By using a single-point electret capacitive microphone structure in the electret microphone, a conductive member replaces two-stage copper rings and damping plates, the structure and assembly process are simplified, and the complexity of electret microphones in the prior art is solved. and the issue of production costs improves production efficiency and market competitiveness.
Patent Information
- Application Number
- CN202421085853.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-18
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-18
AI Technical Summary
The existing electret microphone has complex structures, many parts and complex assembly processes, resulting in low production efficiency, high production costs and poor market competitiveness.
A single-direction electret capacitive microphone structure is adopted, in which a conductive member replaces the original two-stage copper ring and damping plate structure is simplified, and the conductive parts and plates are processed through stamping process to reduce the number of parts and simplify the Assembly process.
It has achieved structural simplification, reduced the use of raw materials, improved production efficiency and market competitiveness, and reduced production costs.
Smart Images
Figure CN222321778U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of microphones, in particular to a unidirectional electret condenser microphone. Background Art
[0002] Electret microphones are widely used in various electronic products because of their stable performance, low distortion, small size and other advantages. Existing electret microphones usually include a package formed by a shell and a circuit board, in which a diaphragm, a plate, a damping plate, a damping, a copper ring and an insulating ring are installed. The damping is fixed on the damping plate. In order to fix the damping plate, the copper ring needs to be divided into two sections, and the damping plate is clamped and fixed between the two sections of the copper ring. This type of electret microphone requires many parts and a complex assembly process, which is not conducive to automated mass production. Therefore, the production efficiency is low, the production cost is high, and the market competitiveness is poor. Utility Model Content
[0003] In view of the above defects, the purpose of the utility model is to provide a unidirectional electret condenser microphone, which has a simple structure, saves labor and materials, has high production efficiency, low production cost and strong market competitiveness.
[0004] In order to achieve the above purpose, the technical solution of the utility model is:
[0005] A unidirectional electret condenser microphone comprises a shell with one end open, a circuit board is arranged at the open end of the shell, a shell sound hole is arranged at the closed end of the shell, a diaphragm is arranged on the inner side of the closed end of the shell, an annular gasket is arranged on the diaphragm, a pole plate is arranged on the gasket, a conductive part is arranged between the pole plate and the circuit board, and a damper is pasted on the middle part of the conductive part.
[0006] Among them, the conductive part includes a conductive part vertically arranged between the circuit board and the electrode plate, the lower end of the conductive part is connected to a connecting part extending obliquely upward and inward, the end of the connecting part is connected to an adhesive part, the adhesive part is provided with a conductive part sound hole, and the damping is pasted on the adhesive part.
[0007] Wherein, the conductive part, the connecting part and the adhesive part are an integrated structure and are formed by a stamping process.
[0008] Wherein, the conductive member is a copper member or an aluminum member.
[0009] Wherein, an insulating ring is provided between the conductive member, the electrode plate and the shell.
[0010] Wherein, an annular vibration ring is provided between the vibration membrane and the inner side of the closed end of the shell.
[0011] A signal amplifying circuit is provided on the inner side of the circuit board, a soldering pad is provided on the outer side of the circuit board, a penetrating metallized hole is provided on the circuit board, and the signal amplifying circuit is electrically connected to the soldering pad through the metallized hole.
[0012] Wherein, a dustproof sheet is provided on the outer side of the closed end of the shell.
[0013] As an implementation manner, the diaphragm is a FEP film.
[0014] As another embodiment, the surface of the electrode plate is covered with a FEP film, and the diaphragm is a PPS film or a PET film.
[0015] After adopting the above technical solution, the beneficial effects of the utility model are:
[0016] Since the utility model unidirectional electret condenser microphone comprises a shell with one end open, the open end of the shell is provided with a circuit board, the closed end of the shell is provided with a shell sound hole, the inner side of the closed end of the shell is provided with a diaphragm, the diaphragm is provided with an annular gasket, the gasket is provided with a plate, a conductive member is provided between the plate and the circuit board, and a damper is pasted on the middle of the conductive member. The utility model replaces the original structure of two sections of copper rings and damping plates with a conductive member, greatly reduces the number of parts of the electret microphone, simplifies the structure of the electret microphone, thereby greatly saving raw materials, simplifying the assembly process, facilitating automated mass production, thereby saving labor and materials, improving production efficiency, reducing production costs, and greatly enhancing market competitiveness.
[0017] In summary, the unidirectional electret condenser microphone of the utility model solves the technical problems of the complex structure and high production cost of the electret microphone in the prior art. The unidirectional electret condenser microphone of the utility model has a simple structure, saves labor and materials, has high production efficiency, low production cost, and strong market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of a unidirectional electret condenser microphone of the utility model;
[0019] Figure 2 yes Figure 1 Schematic diagram of the decomposition structure;
[0020] In the figure: 10, shell, 12, shell sound hole, 20, dustproof sheet, 30, vibration ring, 32, diaphragm, 40, gasket, 50, insulating ring, 60, electrode, 62, electrode sound hole, 70, conductive part, 72, conductive part, 74, adhesive part, 740, conductive part sound hole, 76, connecting part, 80, damping, 90, circuit board, 92, pad, 94, metallized hole, 96, circuit element, 98, circuit board sound hole. DETAILED DESCRIPTION
[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0022] The directions mentioned in this specification are based on the directions shown in the drawings and only represent relative positions, not absolute positions. Embodiment 1
[0023] like Figure 1 and Figure 2 As shown together, a unidirectional electret condenser microphone includes a housing 10 with one end open, a circuit board 90 is provided at the open end of the housing 10, and the edge of the open end of the housing 10 is bent inwardly and pressed against the outside of the circuit board 90, so that the circuit board 90 is constrained in the housing 10. The housing 10 and the circuit board 90 together form a closed microphone package shell. A vibration ring 30, a vibration membrane 32, a gasket 40, a plate 60, a conductive member 70 and an insulating ring 50 are provided in the package between the housing 10 and the circuit board 90. The closed end of the housing 10 is provided with a housing sound hole 12 that connects the inner cavity of the housing 10 with the outside.
[0024] like Figure 1 and Figure 2 As shown in the figure, the diaphragm 32 is arranged on the inner side of the closed end of the housing 10, and a vibration ring 30 is arranged between the diaphragm 32 and the inner side of the closed end of the housing 10. The vibration ring 30 is a ring-shaped structure, and the edge of the diaphragm 32 is fixed on the vibration ring 30. In this embodiment, the diaphragm 32 is preferably a FEP (Fluorinated ethylene propylene) film, and the FEP film needs to be electret. This kind of electret microphone is a diaphragm structure, and this kind of electret microphone has a low cost.
[0025] like Figure 1 and Figure 2 As shown together, an annular gasket 40 is disposed on the diaphragm 32 , a pole plate 60 is disposed on the gasket 40 , a conductive member 70 is disposed between the pole plate 60 and the circuit board 90 , and a damper 80 is pasted to the middle of the conductive member 70 .
[0026] like Figure 1 and Figure 2As shown together, the conductive member 70 includes a conductive portion 72 vertically arranged between the circuit board 90 and the electrode plate 60, the conductive portion 72 is a hollow annular cylindrical structure, the lower end of the conductive portion 72 is connected to a connecting portion 76 extending obliquely upward and inward, the end of the connecting portion 76 is connected to a horizontally arranged pasting portion 74, and the pasting portion 74 is provided with a conductive member sound hole 740, and the conductive member sound hole 740 is arranged at the center of the pasting portion 74. The damper 80 is pasted on the side of the pasting portion 74 facing the electrode plate. In this embodiment, the conductive portion 72, the connecting portion 76 and the pasting portion 74 are an integrated structure, which is processed by a stamping process. In this embodiment, the conductive member 70 is preferably a copper member or an aluminum member.
[0027] like Figure 1 and Figure 2 As shown together, a pole plate sound hole 62 is provided on the pole plate 60. In this embodiment, the pole plate 60 is preferably a copper plate.
[0028] like Figure 1 and Figure 2 As shown together, the outer circumference size of the conductive member 70 and the electrode plate 60 is consistent, an insulating ring 50 is provided between the conductive member 70 and the electrode plate 60 and the housing 10 , and the insulating ring 50 and the electrode plate 60 are both located on the gasket 40 .
[0029] like Figure 1 and Figure 2 As shown in the figure, a signal amplification circuit composed of a plurality of circuit elements 96 is provided on the inner side of the circuit board 90. This signal amplification circuit is a conventional circuit of a microphone and is not the inventive point of the present utility model, so the specific circuit structure is not described in detail here. A soldering pad 92 is provided on the outer side of the circuit board 90, and a metallized hole 94 is provided on the circuit board 90 corresponding to the soldering pad 92, which penetrates the circuit board 90. The signal amplification circuit is electrically connected to the soldering pad 92 through the metallized hole 94, so that the collected sound wave signal is converted into an electrical signal and transmitted to the external terminal circuit. A plurality of circuit board sound holes 98 are provided on the circuit board 90 located on the side of the soldering pad 92.
[0030] like Figure 1 and Figure 2 As shown together, the outer side of the closed end of the housing 10 is covered with a dustproof sheet 20, which plays a dustproof role and can prevent external dust and impurities from entering the microphone through the housing sound hole 12, which is beneficial to ensure the performance and service life of the microphone. Embodiment 2
[0031] This embodiment is basically the same as the unidirectional electret condenser microphone described in Example 1, except that:
[0032] like Figure 1 and Figure 2As shown together, the surface of the electrode plate 60 is covered with a FEP film, and the diaphragm 32 is a PPS (Polyphenylene sulfide) film or a PET (polyethylene glycol terephthalate) film. This type of electret microphone is a back-pole structure, and this type of electret microphone has high stability.
[0033] In summary, the unidirectional electret condenser microphone of the utility model has a simple structure, saves labor and materials, has high production efficiency, low production cost and strong market competitiveness.
[0034] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.
Claims
1. A unidirectional electret condenser microphone, characterized in that: The invention comprises a shell (10) with one end open, a circuit board (90) being provided at the open end of the shell (10), a shell sound hole (12) being provided at the closed end of the shell (10), a diaphragm (32) being provided on the inner side of the closed end of the shell (10), an annular gasket (40) being provided on the diaphragm (32), a pole plate (60) being provided on the gasket (40), a conductive member (70) being provided between the pole plate (60) and the circuit board (90), and a damper (80) being adhered to the middle of the conductive member (70).
2. The unidirectional electret condenser microphone according to claim 1, characterized in that: The conductive member (70) comprises a conductive portion (72) vertically arranged between the circuit board (90) and the electrode plate (60); the lower end of the conductive portion (72) is connected to a connecting portion (76) extending obliquely upward and inward; the end of the connecting portion (76) is connected to an adhesive portion (74); a conductive member sound hole (740) is provided on the adhesive portion (74); and the damper (80) is adhered to the adhesive portion (74).
3. The unidirectional electret condenser microphone according to claim 2, characterized in that: The conductive portion (72), the connecting portion (76) and the adhesive portion (74) are an integrated structure and are formed by a stamping process.
4. The unidirectional electret condenser microphone according to claim 3, characterized in that: The conductive member (70) is a copper member or an aluminum member.
5. The unidirectional electret condenser microphone according to claim 2, characterized in that: An insulating ring (50) is provided between the conductive member (70), the pole plate (60) and the housing (10).
6. The unidirectional electret condenser microphone according to claim 5, characterized in that: An annular vibration ring (30) is provided between the vibration membrane (32) and the inner side of the closed end of the housing (10).
7. The unidirectional electret condenser microphone according to claim 6, characterized in that: A signal amplifying circuit is provided on the inner side of the circuit board (90), a soldering pad (92) is provided on the outer side of the circuit board (90), a penetrating metallized hole (94) is provided on the circuit board (90), and the signal amplifying circuit is electrically connected to the soldering pad (92) via the metallized hole (94).
8. The unidirectional electret condenser microphone according to claim 1, characterized in that: A dustproof sheet (20) is provided on the outer side of the closed end of the housing (10).
9. The unidirectional electret condenser microphone according to any one of claims 1 to 8, characterized in that: The diaphragm (32) is a FEP film.
10. The unidirectional electret condenser microphone according to any one of claims 1 to 8, characterized in that: The surface of the electrode plate (60) is covered with a FEP film, and the diaphragm (32) is a PPS film or a PET film.