Microphone with microphone element

Abstract

The utility model relates to microphone technology field, concretely is a microphone for microphone, including shell, diaphragm, gasket, polar plate, metal ring, circuit board and field effect transistor that set up in shell, diaphragm is located at shell bottom, gasket is located above diaphragm, polar plate is located above gasket, metal ring is located above polar plate, circuit board and field effect transistor are located above metal ring, field effect transistor is located at circuit board bottom surface. Circuit board adopts single -sided circuit board, relative to using double -sided circuit board, uses single -sided circuit board cost to be low. Circuit board is equipped with recess, and the gate of field effect transistor is arranged in recess and is pressed with metal ring, and compared with traditional field effect transistor gate and polar plate spot welding connection, the manual spot welding process and manual plastic ring process in microphone manufacturing are saved, and the artificial cost is reduced. In addition, spot welding machine equipment is saved, and production cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of microphone technology, specifically a microphone head for microphones. Background Technology

[0002] Inside existing electret microphones (commonly known as microphone heads), the circuit board is divided into double-sided circuit boards and single-sided circuit boards. Double-sided circuit boards have many advantages, such as ease of surface mounting and convenient gate ring bonding. The disadvantage is that they are more expensive than single-sided circuit boards. Single-sided circuit boards are cheaper, but their disadvantages include the need for spot welding to connect the MOSFET gate and plate, and the requirement for plastic rings between the MOSFET source and drain to connect to the circuit board, resulting in higher assembly and processing costs. Utility Model Content

[0003] The purpose of this invention is to provide a microphone head to overcome the problems existing in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a microphone head, comprising a housing, a diaphragm, a gasket, an electrode plate, a metal ring, a circuit board, and a field-effect transistor disposed within the housing. The diaphragm is disposed at the bottom of the housing, the gasket is disposed above the diaphragm, the electrode plate is disposed above the gasket, the metal ring is disposed above the electrode plate, and the circuit board and the field-effect transistor are disposed above the metal ring. The circuit board is a single-sided circuit board with a groove on the bottom surface. The field-effect transistor is disposed on the bottom surface of the circuit board, and the gate of the field-effect transistor is disposed in the groove and pressed against the metal ring.

[0005] Based on the above technical solution, the present invention can be further improved as follows:

[0006] In a preferred embodiment of this utility model, the outer shell and the metal ring are made of aluminum-magnesium alloy, and the diaphragm is made of FEP.

[0007] As a preferred embodiment of this utility model, the outer shell is cylindrical, with an opening at the top and a sound inlet at the center of the bottom.

[0008] In a preferred embodiment of this invention, the diaphragm is composed of a diaphragm ring and a membrane.

[0009] In a preferred embodiment of this utility model, the gasket is placed between the bottom surface of the electrode plate and the top surface of the diaphragm, and the gasket is made of insulating material.

[0010] As a preferred embodiment of this utility model, the electrode plate is provided with a plurality of vent holes, and a metal ring and a plastic ring are provided between the electrode plate and the circuit board. The plastic ring is arranged around the metal ring to insulate the metal ring and the electrode plate from the outer shell.

[0011] As a preferred embodiment of this utility model, the circuit board is disposed on the top of the outer casing, the top surface of the circuit board is provided with a positive electrode pad and a negative electrode pad, and the bottom surface of the circuit board is provided with the groove.

[0012] In a preferred embodiment of this invention, the electrode plate is replaced by a back electrode plate, and the diaphragm is made of PPS.

[0013] As a preferred embodiment of this utility model, the depth of the circuit board groove is set to 0.01-0.3 mm, the length of the groove is set to 0.5-3 mm, and the width of the groove is set to 0.5-3 mm.

[0014] The beneficial effects of this utility model are as follows: The microphone capsule provided by this utility model includes a diaphragm, gasket, electrode plate, metal ring, circuit board, and field-effect transistor located within the outer shell. The circuit board is a single-sided circuit board, which is cheaper than using a double-sided circuit board. The circuit board has a groove, and the gate of the field-effect transistor is placed in the groove and pressed against the metal ring. Compared with the traditional spot welding connection between the gate and electrode plate of the field-effect transistor, this eliminates the manual spot welding process and the manual insertion of the plastic ring in the microphone capsule manufacturing process, reducing labor costs. In addition, the spot welding machine is eliminated, reducing production costs. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the structure of a microphone capsule provided in a preferred embodiment of the present invention;

[0017] In the diagram: 1. Outer shell; 11. Sound inlet; 2. Diaphragm; 21. Diaphragm ring; 22. Membrane; 3. Gasket; 4. Electrode; 5. Metal ring; 6. Plastic ring; 7. Field-effect transistor; 71. Gate; 8. Circuit board; 81. Groove; 82. Positive electrode pad; 83. Negative electrode pad. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figure 1 As shown, a preferred embodiment of this utility model provides a microphone head, including a housing 1, a diaphragm 2, a gasket 3, an electrode plate 4, a metal ring 5, a circuit board 8, and a field-effect transistor 7 disposed within the housing 1. The diaphragm 2 is disposed at the bottom of the housing 1, the gasket 3 is disposed above the diaphragm 2, the electrode plate 4 is disposed above the gasket 3, the metal ring 5 is disposed above the electrode plate 4, and the circuit board 8 and the field-effect transistor 7 are disposed above the metal ring 5. The circuit board 8 is a single-sided circuit board with a groove 81. The field-effect transistor 7 is disposed on the bottom surface of the circuit board 8, and the gate 71 of the field-effect transistor 7 is disposed in the groove 81 and pressed against the metal ring 5.

[0022] Preferably, the outer shell 1 and the metal ring 5 are made of aluminum-magnesium alloy, and the diaphragm 2 is made of FEP.

[0023] Preferably, the outer shell 1 is cylindrical, with an opening at the top and a sound inlet 11 at the center of the bottom.

[0024] Preferably, the diaphragm 2 is composed of a diaphragm ring 21 and a membrane 22.

[0025] Preferably, the gasket 3 is placed between the bottom surface of the electrode plate 4 and the top surface of the diaphragm 2, and the gasket 3 is made of insulating material.

[0026] Preferably, the electrode plate 4 is provided with a plurality of vent holes, and a metal ring 5 and a plastic ring 6 are provided between the electrode plate 4 and the circuit board 8. The plastic ring 6 is arranged around the metal ring 5 to insulate the metal ring 5 and the electrode plate 4 from the outer casing 1.

[0027] Preferably, the circuit board 8 is located on the top of the housing 1, and the top surface of the circuit board 8 is provided with a positive electrode pad 82 and a negative electrode pad 83, and the bottom surface of the circuit board 8 is provided with the groove 81.

[0028] Specifically, the diameter of the microphone head can be set to 6.0 mm, 9.7 mm, 26 mm, etc., and the height of the microphone head can be set to 1-10 mm. The depth of the groove 81 on the circuit board 8 can be set to 0.01-0.3 mm, the length of the groove 81 can be set to 0.5-3 mm, and the width of the groove 81 can be set to 0.5-3 mm.

[0029] Optionally, a back electrode plate can be used to replace the electrode plate 4, and the material of the diaphragm 2 is PPS.

[0030] The diaphragm 2 and the electrode 4 constitute the two electrodes of a parallel plate capacitor. The electrode 4, as one of the electrodes, is electrically connected to the gate 71 of the field-effect transistor 7 through the metal ring 5. The diaphragm 2, as the other electrode, is connected to the bottom of the housing 1 and forms a circuit connection with the negative electrode pad 83 of the circuit board 8 through the housing 1.

[0031] The microphone capsule provided by this utility model includes a diaphragm 2, a gasket 3, an electrode plate 4, a metal ring 5, a circuit board 8, and a field-effect transistor 7, all located within a housing 1. The circuit board 8 is a single-sided circuit board, which is less expensive than using a double-sided circuit board. The circuit board 8 has a groove 81, and the gate 71 of the field-effect transistor 7 is disposed within the groove 81 and pressed against the metal ring 5. Compared with the traditional spot welding connection between the gate and electrode plate of the field-effect transistor, this eliminates the manual spot welding process and the manual insertion of the plastic ring in the microphone capsule manufacturing process, reducing labor costs. In addition, it eliminates the need for spot welding equipment, further reducing production costs.

[0032] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0033] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. For example, the shape and size of the groove 81 on the single-sided circuit board can be changed. Regardless of the structural changes, the resulting microphone will fall within the protection scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification but must be determined according to the scope of the claims.

Claims

1. A microphone capsule, characterized in that: The device includes a housing, a diaphragm, a gasket, an electrode plate, a metal ring, a circuit board, and a field-effect transistor (FET) disposed within the housing. The diaphragm is located at the bottom of the housing, the gasket is located above the diaphragm, the electrode plate is located above the gasket, the metal ring is located above the electrode plate, and the circuit board and FET are located above the metal ring. The circuit board is a single-sided circuit board with a groove on its bottom surface. The FET is located on the bottom surface of the circuit board, and its gate is located in the groove and pressed against the metal ring.

2. The microphone capsule according to claim 1, characterized in that: The outer shell and metal ring are made of aluminum-magnesium alloy, and the diaphragm is made of FEP.

3. The microphone capsule according to claim 2, characterized in that: The outer shell is cylindrical, with an opening at the top and a sound inlet at the center of the bottom.

4. The microphone capsule according to claim 1, characterized in that: The diaphragm consists of a diaphragm ring and a membrane.

5. The microphone capsule according to claim 1, characterized in that: The gasket is placed between the bottom surface of the electrode plate and the top surface of the diaphragm, and the gasket is made of insulating material.

6. The microphone capsule according to claim 1, characterized in that: The electrode plate is provided with multiple ventilation holes. A metal ring and a plastic ring are provided between the electrode plate and the circuit board. The plastic ring is arranged around the metal ring to insulate the metal ring and the electrode plate from the outer shell.

7. The microphone capsule according to claim 1, characterized in that: The circuit board is located on the top of the casing, and the top surface of the circuit board is provided with positive electrode pads and negative electrode pads, while the bottom surface of the circuit board is provided with the groove.

8. The microphone capsule according to claim 1, characterized in that: The electrode plate is replaced by a back electrode plate, and the diaphragm is made of PPS.

9. The microphone capsule according to claim 7, characterized in that: The depth of the groove on the circuit board is set to 0.01-0.3 mm, the length of the groove is set to 0.5-3 mm, and the width of the groove is set to 0.5-3 mm.

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