CN103024649B - Sound production device - Google Patents
Sound production device Download PDFInfo
- Publication number
- CN103024649B CN103024649B CN201210528219.XA CN201210528219A CN103024649B CN 103024649 B CN103024649 B CN 103024649B CN 201210528219 A CN201210528219 A CN 201210528219A CN 103024649 B CN103024649 B CN 103024649B
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- China
- Prior art keywords
- magnet steel
- pars stridulans
- magnetic bowl
- frame
- notch part
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Abstract
The invention provides a sound production device which comprises a basin stand, a magnetic bowl contained in the basin stand, magnetic steel attached onto the magnetic bowl and a vibration diaphragm fixed on the basin stand. The magnetic bowl comprises a bottom wall. The magnetic steel comprises main magnetic steel attached to the bottom wall and auxiliary magnetic steel surrounding the main magnetic steel. The basin stand, the magnetic bowl and the vibration diaphragm together enclose an inner cavity. The basin stand further comprises a sound production portion arranged at one end on the basin stand far away from the vibration diaphragm, and the sound production portion is connected with the inner cavity. A plurality of notch portions are arranged on the auxiliary magnetic steel, at least one notch portion is directly connected with the sound production portion, and sound waves generated by vibration of the vibration diaphragm can be emitted out from the sound production portion through the notch portions. Compared with the prior art, the sound production device has good sensitivity and excellent acoustic performance.
Description
[technical field]
The present invention relates to a kind of microphone device, particularly relate to a kind of microphone device be used in portable communication apparatus field.
[background technology]
Along with the fast development of wireless telecommunications, Global Mobile Phone gets more and more, and the requirement of people to mobile phone is not limited only to basic call, more to face shaping and the more requirements of voice quality proposition of conventional mobile phone.That uses microphone device in the mobile phone then becomes one of most important element.
Conventional mobile phone as the microphone device of mobile phone, as loud speaker, receiver etc. its be arranged on the apical position of mobile phone, namely on the top of display screen, offer acoustic aperture at this apical position, sound is spread out of by this acoustic aperture.This design, not only causes because placing loud speaker mobile phone length to become large, and is unfavorable for the development of large-screen mobile phone, make the area of screen restricted, also constrain the flexible placement of mobile phone other electronic devices and components inner.Therefore, a kind of follow-on microphone device is appeared at again.
The microphone device of correlation technique comprises frame, the magnetic bowl be contained in described frame, be sticked the magnet steel on described magnetic bowl and the vibrating diaphragm that is fixed in described frame, the secondary magnet steel that described magnet steel comprises main magnet steel and arranges around described main magnet steel, described frame, magnetic bowl and vibrating diaphragm surround an inner chamber, also pars stridulans is provided with bottom described frame, described pars stridulans one end communicates with described inner chamber, the other end communicates with the external world, described pars stridulans to described vibrating diaphragm direction to be projected to rare part overlapping with vibrating diaphragm.The structure that the microphone device of correlation technique forms back side sounding by the pars stridulans sounding of bottom then makes microphone device when being applied on the portable communication apparatus such as mobile phone, and its position is arranged flexibly.
But, the microphone device of correlation technique maximizes to make actuating force, its secondary magnet steel is arrange enclosed construction in the form of a ring, and pars stridulans does not have lap to the orthographic projection in vibrating diaphragm direction with magnetic bowl, when this sound wave that diaphragm oscillations is produced arrives pars stridulans by inner chamber, sound wave in magnetic gap can be subject to the inhibition of secondary magnet steel and can not pass to pars stridulans, thus the acoustical behavioies such as its sensitivity are restricted.
Therefore, be necessary in fact to propose a kind of new microphone device to solve the problems of the technologies described above.
[summary of the invention]
It is stronger that the technical problem that the present invention need solve is to provide a kind of actuating force, the microphone device that acoustical behavior is more excellent.
According to above-mentioned technical problem, devise a kind of microphone device, its objective is and like this to realize: a kind of microphone device, it comprises frame, the magnetic bowl be contained in described frame, be sticked the magnet steel on described magnetic bowl and the vibrating diaphragm that is fixed in described frame.Described magnetic bowl comprises diapire, and described magnet steel comprises the main magnet steel be sticked on described diapire and the ringwise secondary magnet steel arranged around described main magnet steel.Described frame, magnetic bowl and vibrating diaphragm surround an inner chamber jointly.Described frame also comprises and is arranged on its pars stridulans away from one end of described vibrating diaphragm, and described pars stridulans communicates with described inner chamber.Wherein, described secondary magnet steel is provided with some notch parts, and notch part described at least one is directly communicated with described pars stridulans, and the sound wave that described diaphragm oscillations produces arrives described pars stridulans by this notch part after described inner chamber.
Preferably, described pars stridulans is at least partly overlapping with described diapire to the orthographic projection in the diapire direction of described magnetic bowl, and described diapire is provided with by the position of described pars stridulans orthographic projection overlap the port run through on it, and described port communicates with described notch part.
Preferably, orthographic projection from described pars stridulans to the diapire direction of described magnetic bowl at least and overlapping with the described notch part that described pars stridulans is directly communicated with.
Preferably, described notch part is provided with two, and two described notch parts are symmetrical about the geometric center of described main magnet steel.
Compared with correlation technique, its sensitivity of microphone device of the present invention is good, and acoustical behavior is more excellent.
[accompanying drawing explanation]
Fig. 1 is the stereochemical structure exploded view of microphone device of the present invention.
Fig. 2 is the three-dimensional structure diagram of microphone device of the present invention.
Fig. 3 is along A-A line cut-away view in Fig. 2.
Fig. 4 is the magnetic circuit system three-dimensional structure diagram of microphone device of the present invention.
[embodiment]
Below in conjunction with drawings and embodiments, the invention will be further described.
As Figure 1-4, a kind of microphone device 10, it comprises frame 1, be contained in vibrational system 2 in frame 1 and magnetic circuit system 3.Vibrational system 2 comprises the vibrating diaphragm 21 be fixed in frame 1 and the voice coil loudspeaker voice coil 22 driving vibrating diaphragm 21 to vibrate.Magnetic circuit system 3 comprises magnetic bowl 31, the magnet steel 32 be sticked on magnetic bowl 31.Concrete, magnetic bowl 31 comprises diapire 311, magnet steel 32 comprises the main magnet steel 321 be sticked on diapire 311 and the ringwise secondary magnet steel 322 arranged around main magnet steel 321, secondary magnet steel 322 to be set on main magnet steel 321 and to form magnetic gap (non-label) with main magnet steel 321, and voice coil loudspeaker voice coil 22 is suspended in magnetic gap.Secondary magnet steel 322 arranges in the form of a ring, enhances the actuating force of magnetic circuit system 3 to the full extent, improves the acoustical behavior of microphone device 10.
In microphone device 10 of the present invention, frame 1, magnetic bowl 31 and vibrating diaphragm 21 surround an inner chamber (non-label) jointly.The sidewall that frame 1 comprises bottom and is connected with bottom, frame 1 also comprises and is arranged on its one end away from vibrating diaphragm 21 and runs through pars stridulans 4 on it, namely pars stridulans 4 to be arranged on bottom frame 1 and pars stridulans 4 communicates with inner chamber, thus the back side realizing microphone device 10 goes out acoustic form.Vibrating diaphragm 21 vibrates the sound wave produced and passes to inner chamber, sends from pars stridulans 4 through inner chamber, and now secondary magnet steel 322 because of in the form of a ring, for enclosed construction, to in secondary magnet steel 322 scope, particularly in magnetic gap, sound wave causes certain obstruction, and then the acoustical behavior such as the sensitivity that have impact on microphone device 10.Therefore, microphone device 10 of the present invention is provided with some notch parts 3221 on secondary magnet steel 322, has at least a notch part 3221 to be directly communicated with pars stridulans 4.The sound wave that vibrating diaphragm 21 produces, particularly arrive the acoustic wave segment of magnetic gap then by the without hindrance smooth arrival pars stridulans 4 of notch part 3221, then send from pars stridulans 4, thus make the sensitivity of acoustical generator 40 of the present invention higher, acoustical behavior is more excellent.More excellent, orthographic projection from pars stridulans 4 to diapire 311 direction of magnetic bowl 31 at least and overlapping with the notch part 3221 that pars stridulans 4 is directly communicated with, that notch part 3221 be namely directly communicated with pars stridulans 4 drops in the scope of above-mentioned orthographic projection completely or at least partly.So that sound wave can arrive pars stridulans 4 more smoothly.In microphone device of the present invention, pars stridulans 4 can be a vocal hole, can certainly be a phonocatheter, and it is all used to the sound wave in inner chamber is sent from here.
In present embodiment, diapire 311 is provided with the port 3111 run through on it, port 3111 communicates with notch part 3221 and pars stridulans 4 respectively, concrete, pars stridulans 4 is arranged on the bottom of frame 1, its orthographic projection to diapire 311 direction of magnetic bowl 31 is at least partly overlapping with diapire 311, port 3111 be arranged on diapire 311 by the position of the orthographic projection overlap of pars stridulans 4, port 3111 and the notch part 3221 that directly communicates with pars stridulans 4 are just to arranging and communicating.Sound wave in sound wave, particularly magnetic gap in the scope being arranged so that in inner chamber within secondary magnet steel of port 3111 can be more smooth in passing to pars stridulans 4, further improves the sensitivity of microphone device 40.
In microphone device 10 of the present invention, more excellent, notch part 3221 is provided with two, and two notch parts 3221 are symmetrical about the geometric center of main magnet steel 321.This symmetrical structure arranges the Magnetic driving dynamic balance that voice coil loudspeaker voice coil 22 can be made to be subject to, and optimizes the acoustical behavior of microphone device 10.Certainly, offering of two notch parts 3221 can make secondary magnet steel 322 in discontinuous two sections, and being equivalent to secondary magnet steel 322 is two full symmetric semi-rings; Also secondary magnet steel 322 can be made to be still an entirety, namely only offer the notch part 3221 of, as long as notch part 3221 can provide expedite transmission path for sound wave, its principle is all the same.
Compared with correlation technique, microphone device of the present invention while the major and minor pair of magnet steel ensures that actuating force is strong, notch part offered by secondary magnet steel, reduce the resistance of sound wave when inner chamber passes to pars stridulans as far as possible, make the sensitivity of microphone device higher, acoustical behavior is more excellent, and the symmetrical structure of notch part, make voice coil loudspeaker voice coil stress balance, further ensure the more excellent acoustical behavior of microphone device.
Above-described is only embodiments of the present invention, it should be pointed out that for the person of ordinary skill of the art at this, without departing from the concept of the premise of the invention, can also make improvement, but these all belongs to protection scope of the present invention.
Claims (2)
1. a microphone device, it comprises frame, be contained in the magnetic bowl in described frame, the magnet steel be sticked on described magnetic bowl and the vibrating diaphragm be fixed in described frame, described magnetic bowl comprises diapire, described magnet steel comprises the main magnet steel be sticked on described diapire and the ringwise secondary magnet steel arranged around described main magnet steel, described frame, magnetic bowl and vibrating diaphragm surround an inner chamber jointly, described frame comprises bottom and the sidewall being connected bottom, arrange one bottom described frame and run through pars stridulans on it, described pars stridulans communicates with described inner chamber, for conducting and sending sound wave, it is characterized in that: described secondary magnet steel is provided with some notch parts, notch part described at least one is directly communicated with described pars stridulans, the orthographic projection of described pars stridulans in magnetic bowl direction overlap with the notch part that described pars stridulans directly communicates with this at least partly, described magnetic bowl diapire is provided with notch part just to arranging and the through hole communicated, the sound wave that described diaphragm oscillations produces arrives described pars stridulans by this notch part after described inner chamber.
2. microphone device according to claim 1, is characterized in that: described notch part is provided with two, and two described notch parts are symmetrical about the geometric center of described main magnet steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210528219.XA CN103024649B (en) | 2012-12-10 | 2012-12-10 | Sound production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210528219.XA CN103024649B (en) | 2012-12-10 | 2012-12-10 | Sound production device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103024649A CN103024649A (en) | 2013-04-03 |
| CN103024649B true CN103024649B (en) | 2015-03-18 |
Family
ID=47972691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210528219.XA Expired - Fee Related CN103024649B (en) | 2012-12-10 | 2012-12-10 | Sound production device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103024649B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109040906A (en) * | 2018-08-14 | 2018-12-18 | 瑞声科技(新加坡)有限公司 | Microphone device |
| CN111787468A (en) * | 2020-07-09 | 2020-10-16 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201893922U (en) * | 2010-11-10 | 2011-07-06 | 瑞声光电科技(常州)有限公司 | Electromagnetic loudspeaker |
| CN202127504U (en) * | 2011-06-10 | 2012-01-25 | 瑞声光电科技(常州)有限公司 | Magnetic circuit system |
-
2012
- 2012-12-10 CN CN201210528219.XA patent/CN103024649B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201893922U (en) * | 2010-11-10 | 2011-07-06 | 瑞声光电科技(常州)有限公司 | Electromagnetic loudspeaker |
| CN202127504U (en) * | 2011-06-10 | 2012-01-25 | 瑞声光电科技(常州)有限公司 | Magnetic circuit system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103024649A (en) | 2013-04-03 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150318 Termination date: 20211210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |