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Miniature capacitor type microphone

A micro-capacitor and microphone technology, applied in electrostatic transducer microphones, electret electrostatic transducers, circuit lead arrangement/elimination, etc., can solve the problem of circuit board circuit arrangement short circuit, complicated circuit board design, and complicated assembly process and other problems, to achieve the effect of good product reliability, easy automatic production, and simple assembly process

Active Publication Date: 2008-09-03
WEIFANG GOERTEK MICROELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both structures can improve product performance and reduce product size to a certain extent, but the patent CN200510133717.4 does not reveal in detail the application of elastic metal sheets in other product structures, and the product has room for further improvement in performance and production efficiency ; Patent CN200710129770.6 proposes that the frame portion of the elastic metal sheet is connected to the capacitor assembly and stretches out the feet to connect the circuit board. The product of this structure requires that the design of the circuit board is very complicated, because it is necessary to ensure that the stretched out feet of the elastic metal sheet remain It is very difficult in a fixed position, and it is easy to touch the complex circuit arrangement on the circuit board, causing short circuit and other defects, and the design and assembly process is relatively complicated, so it is difficult to realize automatic mass production

Method used

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  • Miniature capacitor type microphone
  • Miniature capacitor type microphone
  • Miniature capacitor type microphone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment one: if figure 1 As shown, the outer shape and the inner shape of the miniature condenser microphone provided by this embodiment are all square, including a square circuit board substrate 3 with an amplifier 32 installed, a square circuit board frame 2 and a square The circuit board bottom plate 1 with the sound hole 12 forms a sandwich protective structure, and a capacitor assembly is installed inside the protective structure. The capacitor assembly includes a pole plate 5, a diaphragm 7 and an isolation diaphragm 6 arranged between the two. The diaphragm 7 is electrically connected to the circuit 31 on the circuit board substrate 3 through the metal layer 11 on the circuit board bottom plate 1 and the metal hole 21 provided inside the circuit board frame 2, and the pole plate 5 passes through the elastic metal sheet 4 provided inside the protective structure electrically connected to the circuit board substrate 3, such as Figure 1a , 1b As shown, the ela...

Embodiment 2

[0028] Embodiment two: if figure 2 As shown, the main difference between this implementation case and the first implementation case lies in two points: the design of the circuit board frame 2 and the design of the elastic metal sheet 4 . A step 22 is provided at the joint position between the lower end of the circuit board frame 2 and the bottom plate 1, and the peripheral dimension at the step 22 is larger than the upper peripheral dimension of the circuit board frame 2, and the pole plate 5, the diaphragm 7 and the isolation diaphragm 6 are installed in the step 22 , this design makes the positioning of the capacitor components more accurate and the installation efficiency is higher. Such as Figure 2a , 2b As shown, the elastic metal sheet 4 includes an annular frame portion 41 and a foot portion 43, which are connected by a support portion 42, Figure 2a , 2b Embodies the schematic diagram of the processing of the elastic metal sheet of the present embodiment, the ela...

Embodiment 3

[0029] Embodiment three: as image 3 , Figure 3a , 3b, 3c, the main difference between the miniature condenser microphone provided by this embodiment and the second embodiment is the design of the elastic metal sheet 4, the elastic metal sheet 4 of this embodiment includes a frame portion 41 and a foot portion 43, wherein the frame portion 41 It is approximately square and has an opening on one side. On the opposite side of the opening, a positioning extension 45 is provided. On its two sides, two extending feet 43 are provided. The feet 43 are provided with a direction toward The spherical protrusion 44 on one side of the pole plate 5 . Figure 3a , 3b , 3c is the processing schematic diagram of the elastic metal sheet of the present embodiment, Figure 3a is the plane state diagram of the elastic metal sheet 4, through Figure 3a The dotted line bends downward, forming Figure 3b state shown, Figure 3c It is a sectional view of the elastic metal sheet 4. The elasti...

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PUM

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Abstract

The invention discloses a minitype capacitor microphone which includes a circuit board baseplate provided with electronic components, a microphone protection structure composed of a circuit board frame and a base plate and provided with a capacitance component for acoustic-electric transition therein and an acoustic hole for picking up sound signals thereon. An electrode of the capacitance component is electrically communicated to the circuit board baseplate through the base plate and the circuit on the circuit board frame, another electrode of the capacitance component is electrically communicated to the circuit board baseplate through an elastic sheet metal arranged in the circuit board frame, the elastic sheet metal comprises a pin portion for connecting the frame of the circuit board baseplate with the capacitance component, the frame of the elastic sheet metal surrounds the electronic components of the circuit board baseplate. The design has simple assembly technique, is convenient to automation production, has well product reliability.

Description

technical field [0001] The invention relates to a miniature microphone, specifically a miniature condenser microphone. Background technique [0002] As mobile phones, notebooks, hearing aids and other electronic products require smaller and smaller internal parts, a large number of miniature condenser microphones with smaller size, better quality and lower cost are used. At present, the volume of miniature condenser microphones that have appeared on the market is generally in the size of tens of cubic millimeters. Under this size, if the traditional design method of miniature condenser microphones is followed, the basic structure is formed by a metal shell and a circuit board. A protective frame with a plastic cavity for support and insulation installed inside. A metal grid ring is installed inside the cavity for circuit conduction. The grid ring is connected to the capacitor component, because the internal parts are large in size and large in number , will inevitably affec...

Claims

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Application Information

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IPC IPC(8): H04R19/01H04R19/04
CPCH04R1/06H04R19/04H04R1/04
Inventor 王显彬党茂强王玉良姜滨
Owner WEIFANG GOERTEK MICROELECTRONICS CO LTD
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