CN2234166Y - Vibration membrane for microphone - Google Patents

Abstract

The utility model relates to a vibration membrane for a microphone. The position of the circular arc surface of the middle of the membrane is provided with a through hole. The circular arc surface is covered with an auxiliary membrane which is matched with the size of the circular arc surface. The circumference of the auxiliary membrane is stuck on the top side of the connecting side of the circular arc surface and the circular arc ring sheet of the outer ring of the circular arc surface. The microphone has optimal frequency response and high sensitivity through changing the self thickness and the sticking method of the auxiliary membrane, and regulating the size of the through hole.

Description

The microphone vibrating membrane

The utility model relates to a kind of microphone vibrating membrane, particularly relates to a kind of highly sensitive, microphone vibrating membrane that the frequency response effect is good.

Microphone sound head can be divided into two kinds of condenser type and moving-coil types according to the utilization principle in the past.Dynamic microphones sound head make flowing mode, it is the frequency response that produces high, medium and low sound by vibrating membrane, and be attached to coil on the vibrating membrane, then in magnetic field with sound wave to vibrating and cutting magnetic line, produce the output of audio frequency induced electromotive force, through amplifier this signal is amplified then, spread out of from loudspeaker.As shown in Figure 1, schematic perspective view for a kind of vibrating membrane in the past, this vibrating membrane 10 is a frivolous circular film body, form a up arc surface 11 of projection in the middle of it, arc surface 11 rim rings are established a slightly up circular arc ring plate 12 of dimpling, this circular arc ring plate 12 is divided into a coil 13 with the joining place bottom side of arc surface 11 is past, and forms a plurality of ribs 14 on the surface of circular arc ring plate 12, and the outer rim side ring is established a plane periphery 15.The zone of body vibration film 10 frequency responses is distinguished: arc surface 11 is the treble response zone, and circular arc ring plate 12 is the bass response zone, and the rib 14 on the circular arc ring plate 12 is the middle pitch response region.Quality as for the response effect, the soft durometer that is decided by vibrating membrane 10 each response region, as the zone that responds high pitch must have harder character, the zone of response bass then must have softer character, but because vibrating membrane 10 was to be made into integration by a monolithic film body in the past, so each regional thickness on the film body, soft durometer are all identical, so the quality of Whole Response effect is undesirable.

As shown in Figure 2, be another kind of vibrating membrane in the past, this vibrating membrane 20 is to form an arc surface 211 at this diaphragm 21 equally, a circular arc ring plate 212 and a plane periphery 213, difference be in: this arc surface 211 end faces paste one with the big or small identical secondary diaphragm 22 of arc surface 211 shapes, by the thickness of this pair diaphragm 22 to strengthen high pitch to hardness that should zone (just arc surface 211), make it can obtain better treble frequency response, though this kind vibrating membrane 20 has promoted the frequency response effect, but but produce another problem: this pair diaphragm 22 is with the stickup of whole face of dried or AB glue and face soon with this diaphragm arc surface 211, this gummed phenomenon makes vibrating membrane 20 weight become heavy, causes sensitivity to descend.

The purpose of this utility model is to provide a kind of have high sensitivity and the good microphone vibrating membrane of frequency response effect.

Microphone vibrating membrane of the present utility model has this diaphragm, up swells an arc surface in the middle of this this diaphragm, and this arc surface loam cake is established the secondary diaphragm of a fit circular arc face size, and the rim ring is established a circular arc ring plate, it is characterized in that:

The arc surface central authorities of this this diaphragm are provided with a through hole;

This pair diaphragm ring periphery is sticking be located at this arc surface and circular arc ring plate be connected the top side, limit.

As above the utility model of Gou Chenging can obtain optimal frequency response and highly sensitive microphone by changing the size of the thickness of secondary diaphragm own, bonding method and adjustment through hole.

Below by most preferred embodiment and accompanying drawing microphone vibrating membrane of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is the schematic perspective view of vibrating membrane in the past.

Fig. 2 is the another kind of assembled sectional view of vibrating membrane in the past.

Fig. 3 is the three-dimensional exploded view of the utility model preferred embodiment.

Fig. 4 is the assembled sectional view of the utility model preferred embodiment.

Fig. 5 is the cutaway view of the utility model preferred embodiment microphone sound head.

As shown in Figure 3, the microphone vibrating membrane of the utility model preferred embodiment is made up of this diaphragm 30, a secondary diaphragm 40 and a coil 50.

This this diaphragm 30 is a circular membrane, an arc surface 31 up swells in its face centre position, these arc surface 31 central authorities wear a through hole 32, size by changing this through hole 32 is to adjust the weight of vibrating membrane, 31 ring Zhou Bianhuan establish an a little up circular arc ring plate 33 of projection at arc surface, equidistantly be provided with a plurality of ribs 34 on these circular arc ring plate 33 surfaces, the outer annular edge winding one circle plane periphery 35 of circular arc ring plate 33.

This pair diaphragm 40 is a circular film with these arc surface 31 same size sizes, and be covered on the arc surface 31, its zona limit 41 is sticking be located at arc surface 31 and circular arc ring plate 33 be connected 36 top sides, limit, the thickness of this pair diaphragm 40 is looked vibrating membrane institute and must the response effect be decided, its material can be utilized polyester film class (MYLAR) or aluminium alloy class, has the material of hard and light characteristic.

This coil 50 is sticking is located at the bottom side that is connected limit 36 of arc surface 31 and circular arc ring plate 33.

Above-mentioned be associated structure and position for each main member of the utility model microphone vibrating membrane, as for its assembling, as shown in Figure 4, earlier secondary diaphragm 40 is covered on the arc surface 31 of this diaphragm 30, utilize fast do or AB glue with the zona limit 41 of secondary diaphragm 40 sticking be located at this diaphragm 30 arc surfaces 31 and circular arc ring plate 33 be connected limit 36 top sides, the coil 50 sticking bottom sides of being located at this linking limit 36, just finished overall structure again.As shown in Figure 5, be mounted on the situation of microphone sound head 60 about this vibrating membrane, utilize this coil 50 to be placed on magnet 61 upper edges of microphone sound head 60,35 on the plane periphery on this diaphragm 30 ring limits is put on ring edge position, sound head 60 external adhesive rings 62 tops.

The advantage and the effect of the utility model microphone vibrating membrane are described as follows.

The thickness that the utility model has by secondary diaphragm 40 with reach the treble response zone or must be harder and the characteristic of light diaphragm, and with this more soft diaphragm 30 circular arc ring plates 33 as the bass response zone, obtain best frequency response, what secondary diaphragm 40 and this diaphragm 30 gummed places were only limited to this diaphragm 30 is connected limit 36, so, can be because of the weight that cemented surface increased, and influence sensitivity, in addition, by through hole 32 sizes that change on this diaphragm 30, to adjust whole weight, can obtain first-chop microphone.(do not have secondary diaphragm) in the past with the frequency response test experiments of the utility model microphone vibrating membrane in, at this diaphragm thickness is under the condition of 0.012mm, impedance 300 Ω, the utility model intermediate throughholes footpath degree 8, secondary diaphragm thickness is 0.038mm, with 1K, 0db is datum mark, the performance of the utility model high pitch just can obtain preferable treble response than good a lot of in the past.

In sum, microphone vibrating membrane of the present utility model, the thickness that has by secondary diaphragm 40 is reaching preferable treble response, and should pair diaphragm 40 be connected limit 36 with this diaphragm 30 gummed places are only limited to this diaphragm 30, can be because of the weight that cemented surface increased, and influence sensitivity, in addition, through hole 32 sizes by changing on this diaphragm 30 can obtain first-chop microphone.

Claims (1)

1. a microphone vibrating membrane has this diaphragm, up swells an arc surface in the middle of this this diaphragm, and this arc surface loam cake is established the secondary diaphragm of a fit circular arc face size, and the rim ring is established a circular arc ring plate, it is characterized in that:

The arc surface central authorities of this this diaphragm are provided with a through hole;

This pair diaphragm ring periphery is sticking be located at this arc surface and circular arc ring plate be connected the top side, limit.

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