Condenser microphone

1. A condenser microphone, comprising:

a circuit board substrate, a casing fixed to the circuit board substrate, and an amplifier device, an elastic holding component and capacitance components provided inside the microphone, wherein

one or more sound holes are provided on the circuit board substrate or the casing for receiving the external signals;

the elastic holding component is provided on the side with the amplifier device or on the side with the capacitance components, wherein the amplifier device and the capacitance components are both electrically connected to the circuit board substrate;

one or more rigid auxiliary supporting parts are provided on the elastic holding component, wherein the vertical height of the one or more auxiliary supporting parts is greater than that of the amplifier device and less than the distance between the capacitance components and the opposite inner wall of the microphone.

2. A condenser microphone according to claim 1 , wherein,

the elastic holding component further comprises one or more frames and one or more bending parts; and

the capacitance components are kept elastically and electrically connected to the circuit board substrate through the one or more bending parts.

3. A condenser microphone according to claim 1 , wherein,

the elastic holding component comprises a frame parallel to the plane of the circuit board substrate and a bending part extending from one side of the frame; and

one or more auxiliary supporting parts are provided on the frame.

4. A condenser microphone according to claim 2 or claim 3 , wherein,

the elastic end portions of the one or more bending parts are provided with a round and smooth shape.

5. A condenser microphone according to claim 2 , wherein,

the elastic holding component has a curvy and thin toroidal frame structure, the one or more bending parts have a smoothly arched shape, and the one or more auxiliary supporting parts are protrusions provided on the one or more frames.

6. A condenser microphone according to claim 1 or claim 2 or claim 3 , wherein,

the capacitance components comprise a metal ring, a vibration diaphragm, an isolation spacer and a backplate sequentially stacked from the bottom up on the internal surface of the microphone.

7. A condenser microphone according to claim 1 , wherein,

the backplate is kept elastically and electrically connected to the circuit board substrate through the elastic holding component.

8. A condenser microphone according to claim 7 , wherein,

the end portions of the one or more frames are connected to the backplate, and the summits of one or more bending parts are connected to the circuit board substrate.

9. A condenser microphone according to claim 1 , further comprising:

one or more metal filled holes provided within the side walls of the casing, and a metal layer provided between the inner surface of the microphone and the metal ring, wherein the diaphragm is electrically connected to the circuit board substrate through the metal filled holes, the metal layer, and the metal ring in combination.

10. A condenser microphone according to claim 5 , wherein,

the one or more connecting parts connecting the frames and the bending parts have a smoothly curved shape.

11. A condenser microphone according to claim 5 , wherein, a round and smooth protrusion is provided at the summit of each of the arched bending parts.

12. A condenser microphone according to claim 5 , wherein,

the one or more auxiliary supporting parts comprise at least two auxiliary supporting parts symmetrically distributed.

13. A condenser microphone according to claim 5 , wherein,

each of the auxiliary supporting parts is an arched protrusion with a plurality of supporting legs.