CN202385274U

CN202385274U - Transducer

Info

Publication number: CN202385274U
Application number: CN2011204838518U
Authority: CN
Inventors: 王凯
Original assignee: AAC Acoustic Technologies Shenzhen Co Ltd; AAC Acoustic Technologies Changzhou Co Ltd
Current assignee: AAC Technologies Holdings Shenzhen Co Ltd; AAC Technologies Holdings Changzhou Co Ltd
Priority date: 2011-11-29
Filing date: 2011-11-29
Publication date: 2012-08-15
Anticipated expiration: 2021-11-29

Abstract

The utility model provides a transducer, which comprises a shell, a circuit enclosing with the shell to form a housing cavity and a transduction chip arranged on the circuit board. The transduction chip comprises a sound inlet cavity, a sound inlet hole perforating the circuit board is arranged on the circuit board and completely covered by the sound inlet cavity. A layer of a buffer sheet made of a hard material is arranged between the transduction chip and the sound inlet hole, a plurality of micro-holes perforating the buffer sheet and distributed along a certain array and opposite to the sound inlet cavity are arranged on the buffer sheet. Compared with the prior art, the transducer enhances the protection performance such as dropping prevention, increases the reliability of the transducer, has the dust-proof performance and furthermore improves the acoustic performance of the transducer.

Description

Transducer

[technical field]

The utility model relates to a kind of transducer, relates in particular to a kind of transducer that is used in the portable communications product scope.

[background technology]

Mobile communication technology has obtained fast development in recent years.The consumer uses mobile communication equipment more and more, and for example portable phone, the portable phone that can surf the Net, personal digital assistant, laptop computer, laptop computer, figure input card maybe can be through other equipment public or that dedicated communications network communicates.The technological progress of the expansion at honeycomb networking and mobile communication aspect makes more consumers use mobile communication equipment.The consumer not only is satisfied with and can converses the requirement of mobile communication equipment; And want high-quality communication effect can be provided; Especially the development of mobile multimedia technology; The speech quality of mobile phone becomes more important, and the transducer of mobile phone is as the voice device of mobile phone, and its design quality directly influences speech quality.

And the transducer of using more and better performances at present is MEMS (Micro-Electro-Mechanical-System Microphone) transducer.The transducer of correlation technique comprises shell, surrounds the circuit board of host cavity and be arranged on the transducing chip on the said circuit board with said shell, and said circuit board is provided with sound hole.

Yet the transducer of correlation technique; Its transducing chip is over against the sound hole setting; This structure makes the transducer of correlation technique in falling process, receive the direct impact of air-flow; The diaphragm of transducing chip is easy to therefore impaired, thereby the performance of transducer will be restricted, and the client is difficult to when doing reliability test through test.In addition, when the transducer of correlation technique used, extraneous dust etc. are easy can cross said sound hole entering transducing chip, thereby influences the performance of transducing chip.

Therefore, being necessary to propose a kind of new transducer in fact addresses the above problem.

[utility model content]

The technical problem that the utility model need solve provides the good transducer of a kind of acoustical behavior.

According to above-mentioned technical problem, designed a kind of transducer, its objective is such realization: a kind of transducer, it comprises shell, surrounds the circuit board of host cavity jointly and be arranged on the transducing chip on the said circuit board with said shell.Said transducing chip comprises the into operatic tunes, and said circuit board is provided with the sound hole that runs through on it, and said sound hole is advanced the operatic tunes and covers fully by said.Wherein, be provided with the buffering thin slice that one deck hard material is processed between said transducing chip and the said sound hole, said buffering thin slice be provided with some run through array distribution according to certain rules on it over against the said micropore that advances the operatic tunes.

Preferably, said buffering thin slice is that silicon materials are processed.

Preferably, said buffering book sheet is that metal material is processed.

Preferably, the thickness of said buffering book sheet is 0.200mm, and the quantity of the said micropore on it is 3～31, and the aperture is 10～70 microns.

Preferably, said micropore is made as 31, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing between the said micropore horizontally-arranged is 0.030mm, and the spacing between the vertical setting of types is 0.017mm, and the aperture of said micropore is 10 microns.

Preferably, said micropore is made as 10 or 19, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing between the said micropore horizontally-arranged is 0.040mm, and the spacing between the vertical setting of types is 0.023mm, and the aperture of said micropore is 10 microns.

Preferably, said micropore is made as 19, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing between the said micropore horizontally-arranged is 0.035mm, and the spacing between the vertical setting of types is 0.020mm, and the aperture of said micropore is 20 microns.

Preferably, said micropore is made as 10, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing between the said micropore horizontally-arranged is 0.040mm, and the spacing between the vertical setting of types is 0.023mm, and the aperture of said micropore is 20 microns.

Preferably, said micropore is made as 7, and it is evenly distributed on a diameter jointly is in the circular domain of 0.250mm, and the aperture of said micropore is 45 microns or 55 microns.

Preferably, said micropore is made as 3, and it is evenly distributed on a diameter jointly is in the circular domain of 0.250mm, and the aperture of said micropore is 60 microns or 70 microns.

Compare with correlation technique, the transducer of the utility model has strengthened and barrier propterty such as has fallen, and has improved the reliability of transducer, and it also has anti-dust performance simultaneously, has further improved the acoustical behavior of transducer.

[description of drawings]

Fig. 1 is the stereochemical structure exploded view of the utility model transducer.

Fig. 2 is the three-dimensional structure diagram of the utility model transducer.

Fig. 3 is that Fig. 2 is along A-A line cutaway view.

Fig. 4 is the different high frequency characteristics curve charts that several kinds of embodiment of the utility model transducer obtain, and wherein micropore size is 10 microns and evenly distributes.

[embodiment]

Below in conjunction with accompanying drawing and execution mode the utility model is described further.

Shown in Fig. 1-3, a kind of transducer 1, it comprises shell 2, surrounds the circuit board 4 of host cavity 3 jointly and be arranged on the transducing chip 5 on the circuit board 4 with shell 2.Transducing chip 5 is the chips that voice signal converted to the signal of telecommunication, and the utility model is meant MEMS transducing chip.Transducing chip 5 comprises the into operatic tunes 51; Circuit board 4 is provided with the sound hole 41 that runs through on it; Transducer 1 is gathered the external sound signal to transducing chip 5 through sound hole 41; Sound hole 41 is advanced the operatic tunes 51 and is covered fully, and the cross-sectional area that promptly advances the operatic tunes 51 is not less than the cross-sectional area of sound hole 41, and this structure can all pass to transducing chip 5 with the voice signal that sound hole 41 collects.Wherein, Be provided with the buffering thin slice 6 that one deck hard material is processed between transducing chip 5 and the sound hole 41; The setting of buffering thin slice 6 is to cushion for the voice signal that sound hole 41 is collected; Make this voice signal can directly not impact transducing chip 5 and influence the acoustical behavior of transducing chip 5, as be exactly good example in drop test.Buffering thin slice 6 be provided with some run through it on and according to certain rules array distribution over against the micropore that advances the operatic tunes 51 61, what being provided with of micropore 61 guaranteed transducer 1 normally advance sound, the while has also been played the effect that buffer voice is directly impacted transducing chip 5.

In this execution mode, why buffering thin slice 6 adopts hard material to process, and is because offer micropore 61 more easily on the hard material, more excellent, and transducer 1 its buffering thin slice 6 of the utility model processes or adopt metal material to process for silicon materials.

In addition, the buffering thin slice 6 be provided with some run through on it and according to certain rules array distribution over against the micropore that advances the operatic tunes 51 61.Wherein so-called array distribution according to certain rules is such in the utility model transducer; The arrangement of micropore 61 is clocklike; It is not rambling distribution; And array distribution is not to include only even distribution yet, in the utility model, has comprised it not being the even situation that distributes but have certain rule to distribute yet.This structure of array distribution according to certain rules can reduce acoustic resistance, thereby can improve the acoustical behavior of transducer 1.Rambling announcement does not then reach this effect.

The thickness of the utility model transducer 1 its buffering book sheet 6 is 0.200mm, and the quantity of the micropore 61 on it is 3～31, and the aperture is 10～70 microns.Because the micropore of varying number 61 gets up to make transducer 1 to obtain different high frequency characteristicses with the aperture combination of different sizes; As shown in Figure 4; Curve a is a traditional transducers high frequency characteristics curve; Curve b is the high frequency characteristics curves of 20 micropores when evenly distributing, and curve c is the high frequency characteristics curves of 10 micropores when evenly distributing, and curve d is the high frequency characteristics curves of 5 micropores when evenly distributing.Thereby more selection can be arranged when selecting to use the utility model transducer 1.

Concrete, the micropore 61 that is provided with on this practical transducer 1 its buffering thin slice 6 array distribution mode according to certain rules has following situation:

Micropore 61 is made as 31, and it is distributed in a diameter jointly is in the circular domain of 0.2mm, and the spacing d1 between micropore 61 horizontally-arrangeds is 0.030mm, and the spacing d2 between the vertical setting of types is 0.017mm, and the aperture of micropore 61 is 10 microns.

More excellent, micropore 61 is made as 10 or 19, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing d1 between micropore 61 horizontally-arrangeds is 0.040mm, and the spacing d2 between the vertical setting of types is 0.023mm, the aperture of micropore 61 is 10 microns.

More excellent, micropore 61 is made as 19, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing d1 between micropore 61 horizontally-arrangeds is 0.035mm, and the spacing d2 between the vertical setting of types is 0.020mm, the aperture of micropore 61 is 20 microns.

More excellent, micropore 61 is made as 10, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing d1 between micropore 61 horizontally-arrangeds is 0.040mm, and the spacing d2 between the vertical setting of types is 0.023mm, the aperture of micropore 61 is 20 microns.

More excellent, micropore 61 is made as 7, and it is evenly distributed on a diameter jointly is in the circular domain of 0.250mm, and the aperture of micropore 61 is 45 microns or 55 microns.

More excellent, micropore 61 is made as 3, and it is evenly distributed on a diameter jointly is in the circular domain of 0.250mm, and the aperture of micropore 61 is 60 microns or 70 microns.

The quantity of above-mentioned several kinds of micropores 61, aperture and arrangement mode all are embodiment of the utility model, and certainly, the embodiment of the utility model also is not limited to this, but its principle is all the same.

Compare with correlation technique; The buffering thin slice that is provided with micropore that the utility model transducer is set up; Having alleviated voice signal causes the acoustics of transducer can the unsettled situation of property to the direct impact of transducing chip; Improve acoustical behavior, cushioned thin slice simultaneously and also played dustproof effect, further improved the acoustical behavior of transducer.Quantity, aperture and the arrangement mode thereof of the micropore on the buffering thin slice also can make the utility model transducer can obtain more how different high frequency characteristicses, and then have increased the client to its selectivity.

Above-described only is the execution mode of the utility model; Should be pointed out that for the person of ordinary skill of the art at this, under the prerequisite that does not break away from the utility model creation design; Can also make improvement, but these all belong to the protection range of the utility model.

Claims

1. transducer; It comprises shell, surrounds the circuit board of host cavity jointly and be arranged on the transducing chip on the said circuit board with said shell; Said transducing chip comprises the into operatic tunes; Said circuit board is provided with the sound hole that runs through on it; Said sound hole is advanced the operatic tunes and covers fully by said, it is characterized in that: be provided with the buffering thin slice that one deck hard material is processed between said transducing chip and the said sound hole, said buffering thin slice be provided with some run through array distribution according to certain rules on it over against the said micropore that advances the operatic tunes.

2. transducer according to claim 1 is characterized in that: said buffering thin slice is that silicon materials are processed.

3. transducer according to claim 1 is characterized in that: said buffering book sheet is that metal material is processed.

4. according to claim 2 or 3 described transducers, it is characterized in that: the thickness of said buffering book sheet is 0.200mm, and the quantity of the said micropore on it is 3～31, and the aperture is 10～70 microns.

5. transducer according to claim 4; It is characterized in that: said micropore is made as 31, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing between the said micropore horizontally-arranged is 0.030mm; Spacing between the vertical setting of types is 0.017mm, and the aperture of said micropore is 10 microns.

6. transducer according to claim 4; It is characterized in that: said micropore is made as 10 or 19; It is distributed in a diameter jointly is in the circular domain of 0.200mm; Spacing between the said micropore horizontally-arranged is 0.040mm, and the spacing between the vertical setting of types is 0.023mm, and the aperture of said micropore is 10 microns.

7. transducer according to claim 4; It is characterized in that: said micropore is made as 19, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing between the said micropore horizontally-arranged is 0.035mm; Spacing between the vertical setting of types is 0.020mm, and the aperture of said micropore is 20 microns.

8. transducer according to claim 4; It is characterized in that: said micropore is made as 10, and it is distributed in a diameter jointly is in the circular domain of 0.200mm, and the spacing between the said micropore horizontally-arranged is 0.040mm; Spacing between the vertical setting of types is 0.023mm, and the aperture of said micropore is 20 microns.

9. transducer according to claim 4 is characterized in that: said micropore is made as 7, and it is evenly distributed on a diameter jointly is in the circular domain of 0.250mm, and the aperture of said micropore is 45 microns or 55 microns.

10. transducer according to claim 4 is characterized in that: said micropore is made as 3, and it is evenly distributed on a diameter jointly is in the circular domain of 0.250mm, and the aperture of said micropore is 60 microns or 70 microns.