Capacity sound-transmitter vibration diaphragm and its capacity sound transmitter

A condenser microphone and capacitor technology, applied in electrostatic transducer microphones, electromechanical sensors, sensors, etc., can solve the problems of diaphragm fatigue, limiting energy conversion efficiency, distortion, etc., to reduce initial stress, avoid zoned vibration, and improve performance. Effect

Inactive Publication Date: 2007-11-21
郑润远
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the diaphragm works under permanent tension, there are several problems. First, the initial stress of the diaphragm is very high, which limits the response level of the dynamic lower limit of the microphone and causes distortion, especially when used as a high-quality When picking up sound, the weak harmonic information other than the fundamental frequency in the sound wave cannot respond; secondly, due to the clamping effect of the diaphragm ring on the diaphragm, the end of the diaphragm cannot produce substantial vibration when the diaphragm is excited by sound pressure during the transduction process. Due to the permanent displacement, only a small area in the central part of the diaphragm contributes to the energy conversion, thus limiting the efficiency of the energy conversion and the improvement of the sensitivity of the microphone; third, the permanent tension of the diaphragm will cause the fatigue of the diaphragm and affect the Microphone lifetime and reliability

Method used

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  • Capacity sound-transmitter vibration diaphragm and its capacity sound transmitter
  • Capacity sound-transmitter vibration diaphragm and its capacity sound transmitter
  • Capacity sound-transmitter vibration diaphragm and its capacity sound transmitter

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Embodiment Construction

[0019] With reference to Fig. 2, Fig. 3, Fig. 4, a kind of novel condenser microphone diaphragm of the present invention, this diaphragm comprises diaphragm 1, is coated with metal film layer 2 on the upper surface of diaphragm 1, and the central part of this diaphragm is The effective transduction capacitor part 30 has one or more arc-shaped raised rings 40 for suspending / supporting the effective transduction capacitor part 30 on its edge, which can effectively reduce the initial stress of the diaphragm and make the whole vibration system have Ample flexibility. The production of the diaphragm is to firstly press the plastic film and then carry out electroplating; or to carry out electroplating on the plastic film and then carry out press molding.

[0020] As an embodiment of the present invention, as shown in FIG. 3 , the effective transducing capacitor part 30 of the diaphragm can be planar.

[0021] And further, of course, as a preferred embodiment of the present inventio...

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Abstract

The invention comprises a membrane; coating a metal film on said membrane; the center part of the membrane is a transducing capacitor, and on the edge of the membrane are more than one bulged rings used for suspending and supporting the transducing capacitor; by the bulged rings used for suspending and supporting the transducing capacitor in the center, the initial stress of the membrane can be greatly reduced , and the vibrating system has more elasticity; by the metal film coated on the membrane, the rigidity of the membrane surface is enhanced.

Description

technical field [0001] The invention relates to a diaphragm of a condenser microphone and a microphone thereof. Background technique [0002] Existing condenser microphones include three forms, namely the externally polarized voltage condenser microphone, the diaphragm electret condenser microphone and the back pole electret condenser microphone. Regardless of the type of condenser microphone, they have at least a transducing capacitor consisting of a diaphragm and a back plate. [0003] At present, the diaphragm of the condenser microphone is usually a diaphragm with a flat structure, as shown in Figure 1 and Figure 5. Its structure is to use a diaphragm ring to tightly wrap a metal foil or a plastic film coated with a metal conductive layer. Stretch, and then use glue, clamp or other methods to tightly fix the diaphragm on the stretching ring. Since the diaphragm works under permanent tension, there are several problems. First, the initial stress of the diaphragm is very...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R19/01H04R19/04H04R7/00
Inventor 郑润远
Owner 郑润远
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