CN111225327A

CN111225327A - Simple microphone

Info

Publication number: CN111225327A
Application number: CN201911182909.2A
Authority: CN
Inventors: 谭校明; 谭家腾; 谷强
Original assignee: Hunan Shengyi Measurement And Control Technology Co ltd
Current assignee: Hunan Shengyi Measurement And Control Technology Co ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-06-02

Abstract

The invention discloses a simple microphone, and relates to the field of microphones. Including diaphragm, back polar plate, shell, insulating piece, first nut, second nut, spring contact, the shell is the tubular structure, the terminal surface of shell one end is equipped with the diaphragm, it is protruding that the shell inner wall is equipped with the round, first nut fixed connection the shell, first nut will the insulating piece is fixed in the arch, back polar plate one end with the diaphragm is relative, the back polar plate other end is equipped with the external screw thread and passes the insulating piece, the second nut is twisted will on the external screw thread back polar plate with the insulating piece is fixed together, the back polar plate stretches out the insulating piece end with spring contact passes through the spring compression contact and connects. The invention has simple structure, convenient installation, easy processing and low production cost.

Description

Simple microphone

Technical Field

The invention relates to the field of microphones, in particular to a simple microphone.

Background

The microphone is a transducer for converting acoustic signals into electrical signals, and a test capacitor microphone is generally adopted in a sound level meter, and has the characteristics of stable performance, wide dynamic range, flat frequency response, small volume and the like.

The condenser microphone is composed of a back polar plate and a tight metal diaphragm which are close to each other, and the back polar plate and the diaphragm are mutually insulated in electricity to form two electrodes of a capacitor taking air as a medium. The two electrodes are applied with voltage (electret voltage), the capacitor charges and stores charge, when sound wave acts on the diaphragm, the diaphragm vibrates, the distance between the diaphragm and the back polar plate changes, the capacitance also changes, an alternating voltage signal proportional to the sound wave is generated and sent to the following preamplifier. The existing microphone has the defects of complex structure, high reject ratio, low production efficiency, high cost and low cost performance, and is not beneficial to popularization of products.

Disclosure of Invention

The invention aims to provide a simple microphone which is simple in structure, convenient to install, easy to process and low in production cost.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a simple and easy type microphone, includes diaphragm, back polar plate, shell, insulating piece, first nut, second nut, spring contact, the shell is the tubular structure, the terminal surface of shell one end is equipped with the diaphragm, it is protruding that the shell inner wall is equipped with the round, first nut fixed connection the shell, first nut will the insulating piece is fixed in it is protruding, back polar plate one end with the diaphragm is relative, the back polar plate other end is equipped with the external screw thread and passes the insulating piece, the second nut is twisted will on the external screw thread back polar plate with the insulating piece is fixed together, back polar plate stretches out the insulating piece end with spring contact passes through spring compression contact connection.

Preferably, the rear pole plate is provided with an external thread end and a blind hole.

Preferably, a compression spring is arranged in the blind hole.

Preferably, the compression spring extends out of the blind hole end to be fixedly connected with the spring contact.

Preferably, the spring contact contacts an external preamplifier.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the rear polar plate and the insulating sheet are fixed by threads, so that the novel solar cell is easy to process and convenient to disassemble and assemble; the back polar plate is provided with a blind hole as a guide hole of the compression spring, and the other end of the compression spring is fixedly connected with the spring contact.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

in the figure: 1. diaphragm 2, back polar plate 3, shell 4, insulating piece 5, first nut 6, second nut 7, spring contact.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1, a simple microphone, including diaphragm 1, back

polar plate

2, 3 insulating pieces 4 of shell, first nut 5, second nut 6, spring contact 7, shell 3 is the tubular structure, the terminal surface of 3 one ends of shell is equipped with

diaphragm

1, 3 inner walls of shell are equipped with the round arch, first nut 5 fixed connection shell 3, first nut 5 fixes insulating piece 4 in the arch, 2 one end of back polar plate is relative with

diaphragm

1, 2 other ends of back polar plate are equipped with the external screw thread and pass insulating piece 4, second nut 6 twists on the external screw thread and fixes back polar plate 2 and insulating piece 4 together, back polar plate 2 stretches out insulating piece 4 end and spring contact 7 and is connected through spring compression contact.

Specifically, the end of the rear pole plate 2 provided with the external thread is also provided with a blind hole.

Specifically, a compression spring is arranged in the blind hole.

Specifically, the compression spring protrudes out of the blind hole end to be fixedly connected with the spring contact 7.

Specifically, the spring contact 7 contacts the external preamplifier.

When the invention is installed, firstly, the back polar plate 2 is put into the shell 3, then the insulating sheet 4 is sleeved into the back polar plate 2 and is pressed and fixed by the first nut 5, then the second nut 6 is screwed on the back polar plate 2 to fix the back polar plate 2 and the insulating sheet 4 together, and finally the spring part of the spring contact 7 is put into the blind hole of the back polar plate 2, when in use, the spring contact 7 is only needed to be contacted with the thimble connected with the preamplifier.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. The simple microphone is characterized by comprising a diaphragm (1), a rear polar plate (2), a shell (3), an insulating sheet (4), a first nut (5), a second nut (6) and a spring contact (7), wherein the shell (3) is of a cylindrical structure, the end face of one end of the shell (3) is provided with the diaphragm (1), the inner wall of the shell (3) is provided with a circle of protrusion, the first nut (5) is fixedly connected with the shell (3), the insulating sheet (4) is fixed on the protrusion, one end of the rear polar plate (2) is opposite to the diaphragm (1), the other end of the rear polar plate (2) is provided with an external thread and penetrates through the insulating sheet (4), the second nut (6) is screwed on the external thread to fix the rear polar plate (2) and the insulating sheet (4) together, the rear polar plate (2) stretches out the end of the insulating sheet (4) and is connected with the spring contact (7) through spring compression contact.

2. The simplified microphone according to claim 1, wherein the back plate (2) is provided with a blind hole at the end with the external thread.

3. The simplified microphone according to claim 2, wherein the blind hole is provided with a compression spring therein.

4. A simplified microphone according to claim 3, characterised in that the compression spring protrudes through the blind hole and is fixedly connected to the spring contact (7).

5. A simplified microphone according to claim 4, characterised in that the spring contacts (7) are in contact with an external preamplifier.