Unidirectional electret microphone

Abstract

The unidirectional electret microphone comprises a back pole plate, plastic rings are fixed at the two ends of the back pole plate, an integrated shell is fixed on the inner sides of the plastic rings, and the plastic rings are used for fixing the integrated shell and the back pole plate. A center hole is formed in the middle of the integrated shell, and a damping net is adhered to the center hole. The single-directional electret microphone has the advantages that the number of components in the single-directional electret microphone is reduced from original 6 to 4, the assembly efficiency of the microphone can be improved by reducing the number of the components, and the performance and consistency of the microphone can be improved.

Description

Technical Field

[0001] The utility model is a unidirectional electret microphone, belonging to the field of electret condenser microphone (ECM). Background Art

[0002] The structure of the unidirectional electret microphone assembly includes: back plate, quantity 1; copper ring, quantity 2; damping plate, quantity 1; plastic ring, quantity 1; damping, quantity 1. This is a traditional unidirectional electret microphone assembly consisting of 6 parts. It contains a large number of parts, and the sizes of the parts need to match each other, resulting in difficulties in assembly, low efficiency and poor consistency. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a unidirectional electret microphone in response to the above shortcomings, thereby reducing the number of components of the internal components of the unidirectional electret microphone from 6 to 4. The reduction in the number of components can improve the assembly efficiency of the microphone as well as the improvement of performance and consistency.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A unidirectional electret microphone comprises a back plate, with plastic rings fixed at both ends of the back plate, an integral shell fixed inside the plastic ring, and the plastic ring being used to fix the integral shell and the back plate.

[0006] Furthermore, a central hole is provided in the middle of the integrated shell, and a damping net is adhered to the central hole.

[0007] Furthermore, the back plate comprises a copper plate and an electret material, which acts as an electrode and stores charge.

[0008] Furthermore, the one-piece shell is circular and is used to form front and rear cavities.

[0009] Furthermore, the bottom of the integrated shell is open, and both sides of the integrated shell are tightly attached to the plastic ring.

[0010] Furthermore, two arc-shaped protrusions are provided at both ends of the top of the integrated shell, and the arc-shaped protrusions are against the bottom of the back plate.

[0011] The present invention adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0012] Reducing the number of components in the unidirectional electret microphone from 6 to 4 can improve the assembly efficiency of the microphone and improve its performance and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0014] Figure 1 This is a schematic structural diagram of a single-point electret microphone in the present invention;

[0015] Figure 2 It is a structural schematic diagram of the integrated shell in the present utility model. DETAILED DESCRIPTION

[0016] Example 1, as Figure 1 As shown, a unidirectional electret microphone includes a back plate 1, plastic rings 2 are fixed at both ends of the back plate 1, an integral shell 3 is fixed inside the plastic ring 2, the plastic ring 2 is used to fix the integral shell 3 and the back plate 1, and a center hole 4 is provided in the middle of the integral shell 3, as shown in FIG. Figure 2 As shown, a damping net 5 is adhered to the center hole 4 to form an obstacle to sound.

[0017] The plastic ring is used to fix the back plate and the integrated shell.

[0018] The back plate includes a copper plate and an electret material and acts as an electrode and stores charge.

[0019] The integrated shell 3 is circular, with an opening at the bottom. Both sides of the integrated shell 3 are tightly attached to the plastic ring 2. Two arc-shaped protrusions are provided at both ends of the top of the integrated shell 3, which rest against the bottom of the back plate 1. The integrated shell 3 is used to form front and rear cavities.

[0020] The damping net 5 acts as an acoustic resistor.

[0021] The above components constitute the acoustic circuit of a unidirectional electret microphone. Due to its simplified structure, it has the following advantages:

[0022] 1. Reduces the number of electrical connection nodes and improves reliability.

[0023] 2. Simplify mechanical matching dimensions and improve consistency.

[0024] 3. Fewer parts improves assembly efficiency.

[0025] 4. The one-piece shell structure enhances and improves the frequency response characteristics of the unidirectional electret microphone.

[0026] The description of the present invention is provided for purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the disclosed form. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

Claims

1. A unidirectional electret microphone, characterized in that: It comprises a back plate (1), with plastic rings (2) fixed at both ends of the back plate (1), an integral shell (3) fixed inside the plastic ring (2), and the plastic ring (2) being used to fix the integral shell (3) and the back plate (1).

2. The unidirectional electret microphone according to claim 1, wherein: A central hole (4) is provided in the middle of the integrated shell (3), and a damping net (5) is adhered to the central hole (4).

3. The unidirectional electret microphone according to claim 1, wherein: The back plate (1) comprises a copper plate and an electret material, and acts as an electrode and stores charge.

4. The unidirectional electret microphone according to claim 1, wherein: The bottom of the one-piece shell (3) is open, and both sides of the one-piece shell (3) are tightly attached to the plastic ring (2).

5. The unidirectional electret microphone according to claim 1, wherein: Two arc-shaped protrusions are provided at both ends of the top of the integrated shell (3), and the arc-shaped protrusions abut against the bottom of the back plate (1).

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