CN201312383Y

CN201312383Y - Microphone with non-flanging shell

Info

Publication number: CN201312383Y
Application number: CNU2008202271031U
Authority: CN
Inventors: 张成宾; 李彬
Original assignee: WEIFANG XINGANG ELECTRONICS CO Ltd
Current assignee: WEIFANG XINGANG ELECTRONICS CO Ltd
Priority date: 2008-12-16
Filing date: 2008-12-16
Publication date: 2009-09-16
Anticipated expiration: 2018-12-16

Abstract

The utility model discloses a microphone with non-flanging shell, which comprises a tubular metal shell, wherein the bottom of the shell is provided with shell sound holes, the upper portion of the inner cavity of the shell is provided with a metal retaining ring which is matched with the side wall of inner cavity of the shell in interference, and the retaining ring tightly presses each part in the shell to match in the inner cavity of the shell. The bottommost layer of the inner cavity of the shell is provided with a back electrode membrane, the upper side of the back electrode membrane is provided with an insulating backing ring, the upper side of the backing ring is provided with a back electrode plate, the outer side of the back electrode plate is sleeved with an insulating ring, the upper side of the insulating ring is provided with a circuit board, the retaining ring is installed on the upper side of the circuit board, the back electrode plate is electrically connected with a signal input end of the circuit board through conducting resin, and the back electrode membrane is electrically connected with another signal input end of the circuit board through the shell and the retaining ring. The microphone with non-flanging shell adopted the structure has simple structure and convenient packing, is suitable for being used in various electronic equipment, and is helpful to reduce cost of equipment.

Description

A kind of shell does not have the microphone of flange

Technical field

The utility model relates to the microphone that a kind of shell does not have flange.

Background technology

Microphone is an acoustical-electrical transducer spare, traditional microphone generally comprises tubular shell, acoustic-electric transition components and circuit board are installed in the housing, and circuit board in the housing and acoustic-electric transition components are closely pressed together in the housing with the form of housing oral area to in-flanges, the weak point of this microphone is: need expensive special-purpose edge banding machine to carry out edge sealing when in the end encapsulating, increased the cost of manufacture of microphone, and this microphone package tightness is had relatively high expectations, in encapsulation process, need edge banding machine is constantly debugged and safeguarded, increased cost of equipment maintenance.

The utility model content

The technical problems to be solved in the utility model be at above-mentioned deficiency provide a kind of simple in structure, encapsulate easily that shell does not have the flange microphone.

For solving the problems of the technologies described above, this shell does not have the microphone of flange, comprise the tubular metal shell, the bottom surface of housing is provided with the housing sound hole, its design feature is: the inner chamber top of housing is equipped with the metal retainer ring with housing intracavity sidewall interference fit, retainer ring with each parts compression fit in the housing in the inner chamber of housing.

This shell does not have the microphone of flange and by the interference fit principle microphone is realized encapsulation, in the housing inner chamber, install when needing to encapsulate behind each building block, in the top of microphone case inner chamber a metal retainer ring is installed again, the lateral wall of retainer ring and inner walls interference fit, and retainer ring applied an axial compressive force in housing, make retainer ring together, thereby realize the purpose of encapsulation microphone each the building block compression fit in the microphone case.Each building block in the microphone case generally all is parallel stepped construction, adopt the packaged type of retainer ring interference fit, can guarantee that each parts are stressed evenly in when encapsulation housing, thereby guarantee the consistency when microphone is made in batches, this shell does not have the microphone of flange, by increasing the retainer ring of an interference fit, and a housing oral area overturning process and special-purpose edge banding machine have been saved, the cost of manufacture and the equipment maintenance cost of microphone have been saved greatly, when the pressurization retainer ring, only need a general pressurized equipment just can finish the encapsulation of microphone, very convenient.

As improvement, can more closely be bonded together in order to make housing and retainer ring, hull outside is provided with the pressure hole corresponding with the retainer ring position.

By from hull outside to the retainer ring pressing mode, the interference fit of retainer ring and housing is reinforced, can prevent effectively that retainer ring is loosening, strengthened the structural stability of this structure-borne sound transmission device.

The implementation of not having the electret microphone of flange as a kind of shell, the inner chamber bottom of housing is equipped with the backplane film, the top of backplane film is equipped with the insulation gasket ring, the top of gasket ring is equipped with back pole plate, the outside of back pole plate is set with dead ring, the top of dead ring is equipped with circuit board, retainer ring is installed in the top of circuit board, back pole plate is electrically connected with a signal input part formation of circuit board by conducting resinl, and the backplane film is electrically connected with another signal input part formation of circuit board by housing and retainer ring.

Electret microphone is a kind of microphone that is most widely used at present, the electret microphone that this shell does not have a flange installs vibration component and circuit board in housing after, by the mode that the metal retainer ring is installed above the circuit board with circuit board and vibration component compression fit in housing, because the madial wall interference fit of the lateral wall of metal retainer ring and housing, so can guarantee electret microphone structural stability in use; This electret microphone need not housing oral area flange in encapsulation process, not only simplified operation, has also reduced the mechanical deformation of housing, has guaranteed the acoustic characteristic of each parts in the housing.

Above-mentioned shell does not have the use of flange electret microphone for convenience, and circuit board is provided with metallic pin, and circuit board is by the outside output signal of guide pin.

In sum, adopt the shell of this structure not have the flange microphone, simple in structure, encapsulation convenience is adapted at using in the various electronic equipments, helps to reduce equipment cost.

Description of drawings

In conjunction with the accompanying drawings the utility model is described in further detail:

Fig. 1 is a structural representation of the present utility model.

Among the figure: 1 is housing, and 11 is the housing sound hole, and 2 is the backplane film, and 21 is zona, and 3 is gasket ring, and 4 is back pole plate, and 41 is the back pole plate sound hole, and 5 is dead ring, and 6 is circuit board, and 61 is electronic devices and components, and 62 is conducting resinl, and 63 is guide pin, and 7 is retainer ring, and 8 for pressing the hole.

Embodiment

As shown in Figure 1, the structural representation that does not have the flange microphone for this shell, present embodiment is that example is elaborated with the electret microphone, this electret microphone comprises tubular metal shell 1, the bottom surface of housing 1 is provided with the housing sound hole 11 inside and outside the connection housing 1, backplane film 2 as a pole plate of plane-parallel capacitor is installed on the bottom surface of housing 1 inner chamber, backplane film 2 be arranged in parallel with housing 1 inner bottom surface, be coated with the layer of metal plated film on the lower surface of backplane film 2, in order backplane film 2 to be in have the tensioned state of certain tension force, backplane film 2 sticks on the upper surface of zona 21, zona 21 is made by metal material, like this, metal coating is electrically connected with housing 1 formation by zona 21, the top of backplane film 2 is equipped with the back pole plate 4 as another pole plate of plane-parallel capacitor, in order to prevent back pole plate 4 and backplane film 2 contact short circuits, between back pole plate 4 and the backplane film 2 gasket ring 3 is installed, gasket ring 3 is made of insulating material, back pole plate 4 is made by metal material, be connected with one deck electret film on the lower surface of back pole plate 4, be filled with electric charge in the electret film in advance, the top of back pole plate 4 is equipped with circuit board 6, in order to prevent back pole plate 4 and housing 1 short circuit, the outside at back pole plate 4 also is set with dead ring 5, dead ring 5 has also played supporting role to circuit board 6, make between circuit board 6 and the back pole plate 4 and have certain space, be welded with electronic devices and components 61 on the circuit board 6, back pole plate 4 is electrically connected with an input formation of electronic devices and components 61 by conducting resinl 62, for the ease of above-mentioned each parts evenly are pressed together in the housing 1, the top of circuit board 6 is equipped with retainer ring 7, the inner ring surface interference fit of the outer ring surface of retainer ring 7 and housing 1, so will be fastened with housing 1 in the time of in retainer ring 7 is pressed into housing 1 under external force, and with each parts compression fit of retainer ring 7 belows in housing 1, adopt this packaged type, only need provide an external pressure device to get final product, encapsulation is simple, and cost reduces; Loosening in order to prevent retainer ring 7, apply a pressure force in housing 1 to housing 1 and retainer ring 7 corresponding positions, housing 1 and retainer ring 7 more closely are combined together, pressing finishes, on the outer peripheral face of housing 1, leave and press hole 8, in order to guarantee the pressing effect, correspondence is provided with two and presses hole 8 on housing 1 periphery; For being constituted with circuit board 6 by housing 1, backplane film 2 is electrically connected, retainer ring 7 is made by metal material, be connected with external equipment for the ease of this microphone, be welded with metallic pin 63 on the circuit board 6, for the ease of 2 vibrations of backplane film, back pole plate 4 is provided with back pole plate sound hole 41, like this, when sound wave arrives, the amplitude of backplane film 2 will be bigger.

Claims

1, a kind of shell does not have the microphone of flange, comprise tubular metal shell (1), the bottom surface of housing (1) is provided with housing sound hole (11), it is characterized in that: the inner chamber top of housing (1) is equipped with the metal retainer ring (7) with housing (1) intracavity sidewall interference fit, retainer ring (7) with each parts compression fit in the housing (1) in the inner chamber of housing (1).

2, shell as claimed in claim 1 does not have the microphone of flange, it is characterized in that: housing (1) outside is provided with the pressure hole (8) corresponding with retainer ring (7) position.

3, shell as claimed in claim 1 or 2 does not have the microphone of flange, it is characterized in that: the inner chamber bottom of housing (1) is equipped with backplane film (2), the top of backplane film (2) is equipped with insulation gasket ring (3), the top of gasket ring (3) is equipped with back pole plate (4), the outside of back pole plate (4) is set with dead ring (5), the top of dead ring (5) is equipped with circuit board (6), retainer ring (7) is installed in the top of circuit board, back pole plate (4) is electrically connected with a signal input part formation of circuit board (6) by conducting resinl (62), and backplane film (2) is electrically connected with another signal input part formation of circuit board (6) by housing (1) and retainer ring (7).

4, shell as claimed in claim 3 does not have the microphone of flange, it is characterized in that: circuit board (6) is provided with metallic pin (63), and circuit board (6) is by the outside output signal of guide pin (63).