CN204652640U - A kind of electro-acoustic conversion device - Google Patents
A kind of electro-acoustic conversion device Download PDFInfo
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- CN204652640U CN204652640U CN201520333132.6U CN201520333132U CN204652640U CN 204652640 U CN204652640 U CN 204652640U CN 201520333132 U CN201520333132 U CN 201520333132U CN 204652640 U CN204652640 U CN 204652640U
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- voice coil
- frequency dividing
- dividing circuit
- piezoelectric patches
- vibrating diaphragm
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Abstract
The utility model discloses a kind of electro-acoustic conversion device, comprising: vibrational system and the magnetic circuit system with magnetic gap; Vibrational system comprises: vibrating diaphragm, to be incorporated into below vibrating diaphragm and the second frequency dividing circuit being suspended in the voice coil loudspeaker voice coil in magnetic gap, the piezoelectric patches being incorporated into vibrating diaphragm side, the first frequency dividing circuit be connected with voice coil loudspeaker voice coil and being connected with piezoelectric patches; The first via audio signal that outside inputs by the first frequency dividing circuit divides the low frequency signal that occurs frequently to export voice coil loudspeaker voice coil to; The second tunnel audio signal that outside inputs by the second frequency dividing circuit divides the high-frequency signal that occurs frequently to drive piezoelectric patches.The utility model has the vocal structure of DYN dynamic vocal structure and piezoelectric type simultaneously, and be provided with two frequency dividing circuits, diaphragm oscillations sounding is driven when piezoelectric patches has high-frequency signal to input, drive diaphragm oscillations sounding under the influence of a magnetic field during input when voice coil loudspeaker voice coil has a low frequency signal, thus achieve a kind of electro-acoustic conversion device of ultrabroad band of good performance.
Description
Technical field
The utility model relates to a kind of electro-acoustic conversion device.
Background technology
Common DYN dynamic receiver (Receiver) and loud speaker (Speaker), be below referred to as moving-coil type electroacoustic conversion equipment.No matter be applied to mobile phone or earphone, the higher frequency response curve of receiver just there will be quick drop at 6k-9kHz, the higher frequency response curve of loud speaker also there will be quick drop after tens KHz, and this is said high-frequency cut-off frequency namely.Due to the restriction of the materials and process of moving-coil electro-acoustic conversion device, high-frequency cut-off frequency is difficult to promote.
Along with the application of 4G communication, require the electro-acoustic conversion device of ultrabroad band (super wideband), need high-frequency cut-off frequency can reach 16kHz and more than, and existing this moving-coil type electroacoustic conversion equipment has been difficult to reach requirement.
Utility model content
The purpose of this utility model is to provide a kind of new solution of electroacoustic converter device of ultrabroad band.
The utility model provides a kind of electro-acoustic conversion device, comprising: vibrational system and the magnetic circuit system with magnetic gap; Described vibrational system comprises: vibrating diaphragm, to be incorporated into below described vibrating diaphragm and the second frequency dividing circuit being suspended in the voice coil loudspeaker voice coil in described magnetic gap, the piezoelectric patches being incorporated into described vibrating diaphragm side, the first frequency dividing circuit be connected with described voice coil loudspeaker voice coil and being connected with described piezoelectric patches; The first via audio signal that outside inputs by described first frequency dividing circuit divides the low frequency signal that occurs frequently to export described voice coil loudspeaker voice coil to; The second tunnel audio signal that outside inputs by described second frequency dividing circuit divides the high-frequency signal that occurs frequently to drive described piezoelectric patches.
Preferably, described first frequency dividing circuit is low pass filter, and described second frequency dividing circuit is high pass filter.
Preferably, described vibrating diaphragm comprises the planar portions being positioned at center and the ring portion being positioned at described planar portions edge, and described piezoelectric patches is arranged at the position of the planar portions of described vibrating diaphragm.
Preferably, described vibrational system also comprises the centring disk fixing with described voice coil loudspeaker voice coil, described centring disk comprises the first conducting wire and the second conducting wire that are formed at its surface, the first via audio signal of outside input inputs to described first frequency dividing circuit through described first conducting wire, and the second tunnel audio signal of outside input inputs to described second frequency dividing circuit through described second conducting wire.
Preferably, described first frequency dividing circuit and described second frequency dividing circuit are arranged at the surface of described centring disk.
Preferably, described first frequency dividing circuit is arranged at the surface of described centring disk, and described second frequency dividing circuit is arranged at the surface of described piezoelectric patches.
Preferably, the arrangement mode of described vibrational system is following arbitrary: be followed successively by piezoelectric patches, centring disk, vibrating diaphragm, voice coil loudspeaker voice coil from top to bottom; Or, be followed successively by vibrating diaphragm, piezoelectric patches, centring disk, voice coil loudspeaker voice coil from top to bottom; Or, be followed successively by piezoelectric patches, vibrating diaphragm, centring disk, voice coil loudspeaker voice coil from top to bottom.
Preferably, described centring disk is provided with two the second pads be electrically connected with described piezoelectric patches and is provided with two the first pads be electrically connected with described voice coil loudspeaker voice coil at its lower surface in surface thereon.
Preferably, the center of described vibrating diaphragm is provided with opening, and described centring disk comprises central part, outer shroud, and connects the connecting portion of described central part and outer shroud, and described first pad and the second pad are arranged at the central part of described centring disk.
Inventor of the present utility model finds, the electro-acoustic conversion device of the ultrabroad band be not also combined with moving-coil type vocal structure in the prior art.Therefore, the technical assignment that the utility model will realize or technical problem to be solved are that those skilled in the art never expect or do not anticipate, therefore the utility model is a kind of new technical scheme.
Electro-acoustic conversion device of the present utility model has the vocal structure of DYN dynamic vocal structure and piezoelectric type simultaneously, and be provided with two frequency dividing circuits, diaphragm oscillations sounding is driven when piezoelectric patches has high-frequency signal to input, drive diaphragm oscillations sounding under the influence of a magnetic field during input when voice coil loudspeaker voice coil has a low frequency signal, thus achieve a kind of electro-acoustic conversion device of ultrabroad band of good performance.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present utility model, further feature of the present utility model and advantage thereof will become clear.
Accompanying drawing explanation
In the description combined and the accompanying drawing forming a part for specification shows embodiment of the present utility model, and illustrate that one is used from and explains principle of the present utility model together with it.
Fig. 1 is the structural representation of the utility model electro-acoustic conversion device.
Fig. 2 is the structural representation of the utility model centring disk.
Fig. 3 is that the utility model arranges the structural representation of the first conducting wire and the first frequency dividing circuit at the lower surface of centring disk.
Fig. 4 is that the utility model arranges the structural representation of the second conducting wire and the second frequency dividing circuit at the upper surface of centring disk.
Fig. 5 is the structural representation that the utility model arranges the second frequency dividing circuit on piezoelectric patches.
Description of reference numerals
1 protecgulum, 2 piezoelectric patches, 3 centring disks, 4 vibrating diaphragms, 5 voice coil loudspeaker voice coils, 6 frameworks and magnetic circuit system, 301 outer shrouds, 302 central parts, 303 cantilevers, 100 low pass filters, 200 high pass filters, 31 pads, 33 pads, 32 first pads, 34 second pads.
Embodiment
Various exemplary embodiment of the present utility model is described in detail now with reference to accompanying drawing.It should be noted that: unless specifically stated otherwise, otherwise positioned opposite, the numerical expression of the parts of setting forth in these embodiments and step and numerical value do not limit scope of the present utility model.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the utility model and application or use.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, technology, method and apparatus should be regarded as a part for specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
It should be noted that: represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
The shell of the fixing vibrational system of electro-acoustic conversion device involving vibrations system of the present utility model, magnetic circuit system and collecting and magnetic circuit system.Magnetic circuit system comprises fixing successively from top to bottom washer, magnet, frame etc., and magnet can comprise centring magnet and limit magnet, and corresponding with it, washer can comprise center washer and limit washer, and the gap between centring magnet and limit magnet is magnetic gap.Certainly, the structure of magnetic circuit system and the setting of magnetic gap also can otherwise realize, and those skilled in the art can design according to the needs of prior art and applied environment.Vibrational system comprises vibrating diaphragm, to be incorporated into below vibrating diaphragm and to be suspended in voice coil loudspeaker voice coil in magnetic gap, to be incorporated into the piezoelectric patches of vibrating diaphragm side.
Also comprise the first frequency dividing circuit be connected with voice coil loudspeaker voice coil and the second frequency dividing circuit be connected with piezoelectric patches, the object of frequency division is separated the radio-frequency component of signal and low-frequency component, the first via audio signal that outside inputs by the first frequency dividing circuit divides the low frequency signal that occurs frequently to export voice coil loudspeaker voice coil to, and the second tunnel audio signal that outside inputs by the second frequency dividing circuit divides the high-frequency signal that occurs frequently to drive piezoelectric patches.The source of two-way audio signal is identical, but the second tunnel audio signal have passed through power amplifier power can be larger.Wherein, the first frequency dividing circuit can be such as low pass filter, and the second frequency dividing circuit can be such as high pass filter.
By said structure, achieve the combination of moving-coil type sound-producing device and piezoelectric type sound-producing device.The high-frequency cut-off frequency of piezoelectric type sound-producing device can reach 16kHz and more than, by arranging above-mentioned frequency dividing circuit, diaphragm oscillations sounding is driven when piezoelectric patches has high-frequency signal to input, drive diaphragm oscillations sounding under the influence of a magnetic field during input when voice coil loudspeaker voice coil has a low frequency signal, thus achieve a kind of electro-acoustic conversion device of ultrabroad band.
In addition, piezoelectric patches is arranged at the center of vibrating diaphragm, such piezoelectric patches can play the effect of vibrating diaphragm reinforcement part or DOME, and such as vibrating diaphragm can comprise the planar portions being positioned at center and the ring portion being positioned at planar portions edge, piezoelectric patches is arranged at the position of the planar portions of vibrating diaphragm.
Be depicted as an embodiment of the utility model electro-acoustic conversion device with reference to figure 1-4, comprise successively from top to bottom: protecgulum 1, piezoelectric patches 2, centring disk 3, vibrating diaphragm 4, voice coil loudspeaker voice coil 5, framework and magnetic circuit system 6.
Magnetic circuit system has magnetic gap, the shell of protecgulum 1 and the fixing vibrational system of framework composition collecting and magnetic circuit system, in magnetic circuit system and the schematic volume drawing Fig. 1 of framework.
Piezoelectric patches 2, centring disk 3, vibrating diaphragm 4, voice coil loudspeaker voice coil 5 form vibrational system.As can be seen from Figure 1, vibrating diaphragm comprises the planar portions being positioned at center, the ring portion being positioned at planar portions edge and is positioned at the fixed part fixing with shell of outermost; Piezoelectric patches is arranged at the top of the planar portions of vibrating diaphragm, the planar portions of vibrating diaphragm goes in the position of corresponding piezoelectric patches to expect to form through opening, piezoelectric patches covers this opening and combines with vibrating diaphragm, arranges the effect that rear piezoelectric patches can play vibrating diaphragm reinforcement or DOME like this.Fig. 1 is decomposing schematic representation, and after assembling, voice coil loudspeaker voice coil can be suspended in the magnetic gap of magnetic circuit system.
With reference to the schematic structure that Figure 2 shows that centring disk 3, centring disk 3 comprises outer shroud 302 and is positioned at the central part 301 at center, central part 301 and outer shroud 302 is coupled together by 4 cantilevers 303 (connecting portion).
With reference to the lower surface that Figure 3 shows that centring disk 3, be provided with the first conducting wire (not shown in FIG.), the low-pass first order filter 100 be made up of inductance and load resistance at lower surface, be positioned at two pads 31 of outer shroud corner, be positioned at two the first pads 32 of central part.First conducting wire is electrically connected to access first via audio signal by pad 31 with external circuit, take out low frequency signal via low-pass first order filter filtering, this low frequency signal exports voice coil loudspeaker voice coil 5 to by the first pad 32.
With reference to the upper surface that Figure 4 shows that centring disk 3, be provided with the second conducting wire (not shown in FIG.), the single order high pass filter 200 be made up of electric capacity and load resistance at upper surface, be positioned at two pads 33 of two other corner of outer shroud, be positioned at two the second pads 34 of central part.Second conducting wire is electrically connected to access the second tunnel audio signal with external circuit by pad 33, and take out high-frequency signal via single order high pass filter filters, this high-frequency signal exports piezoelectric patches 2 to by the second pad 34.
In another embodiment, the second frequency dividing circuit can also be arranged on piezoelectric patches 2.Shown in figure 5, the single order high pass filter 200 be made up of electric capacity and load resistance is arranged on piezoelectric patches 2.The second conducting wire on centring disk 3 is electrically connected to access the second tunnel audio signal with external circuit by pad 33, then export the second tunnel audio signal to single order high pass filter 200 filtering by pad 34 and take out high-frequency signal, drive piezoelectric patches to vibrate by this high-frequency signal.
In above embodiment, the arrangement mode of vibrational system is followed successively by piezoelectric patches, centring disk, vibrating diaphragm, voice coil loudspeaker voice coil from top to bottom.Or the arrangement mode of vibrational system is followed successively by vibrating diaphragm, piezoelectric patches, centring disk, voice coil loudspeaker voice coil from top to bottom.Or the arrangement mode of vibrational system is followed successively by piezoelectric patches, vibrating diaphragm, centring disk, voice coil loudspeaker voice coil from top to bottom.In this several arrangement mode, centring disk is all between piezoelectric patches and voice coil loudspeaker voice coil, can utilize centring disk that conducting wire and frequency dividing circuit are set, again because the center of vibrating diaphragm is provided with opening, so can arrange at the upper surface of the central part of centring disk the second pad be connected with piezoelectric patches, the lower surface of central part arranges the first pad be connected with voice coil loudspeaker voice coil, and such connected mode does not have the short out easy realization of bar connecting line.
Electro-acoustic conversion device of the present utility model has the vocal structure of DYN dynamic vocal structure and piezoelectric type simultaneously, and be provided with two frequency dividing circuits, diaphragm oscillations sounding is driven when piezoelectric patches has high-frequency signal to input, drive diaphragm oscillations sounding under the influence of a magnetic field during input when voice coil loudspeaker voice coil has a low frequency signal, thus achieve a kind of electro-acoustic conversion device of ultrabroad band of good performance.Meanwhile, the utility model can utilize centring disk to arrange conducting wire and frequency dividing circuit, connects up ingenious and easily realizes.
Although be described in detail specific embodiments more of the present utility model by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit scope of the present utility model.It should be appreciated by those skilled in the art, when not departing from scope and spirit of the present utility model, above embodiment can be modified.Scope of the present utility model is limited by claims.
Claims (9)
1. an electro-acoustic conversion device, is characterized in that, comprising:
Vibrational system and the magnetic circuit system with magnetic gap;
Described vibrational system comprises: vibrating diaphragm (4), be incorporated into described vibrating diaphragm (4) below and be suspended in the voice coil loudspeaker voice coil (5) in described magnetic gap, the piezoelectric patches (2) being incorporated into described vibrating diaphragm (4) side, the first frequency dividing circuit be connected with described voice coil loudspeaker voice coil (5) and the second frequency dividing circuit be connected with described piezoelectric patches (2);
The first via audio signal that outside inputs by described first frequency dividing circuit divides the low frequency signal that occurs frequently to export described voice coil loudspeaker voice coil (5) to; The second tunnel audio signal that outside inputs by described second frequency dividing circuit divides the high-frequency signal that occurs frequently to drive described piezoelectric patches (2).
2. device according to claim 1, is characterized in that, described first frequency dividing circuit is low pass filter (100), and described second frequency dividing circuit is high pass filter (200).
3. device according to claim 1, it is characterized in that, described vibrating diaphragm (4) comprises the planar portions being positioned at center and the ring portion being positioned at described planar portions edge, and described piezoelectric patches (2) is arranged at the position of the planar portions of described vibrating diaphragm (4).
4. device according to claim 1, it is characterized in that, described vibrational system also comprises the centring disk (3) fixing with described voice coil loudspeaker voice coil (5), described centring disk (3) comprises the first conducting wire and the second conducting wire that are formed at its surface, the first via audio signal of outside input inputs to described first frequency dividing circuit through described first conducting wire, and the second tunnel audio signal of outside input inputs to described second frequency dividing circuit through described second conducting wire.
5. device according to claim 4, is characterized in that, described first frequency dividing circuit and described second frequency dividing circuit are arranged at the surface of described centring disk (3).
6. device according to claim 4, is characterized in that, described first frequency dividing circuit is arranged at the surface of described centring disk (3), and described second frequency dividing circuit is arranged at the surface of described piezoelectric patches (2).
7. the device according to any one of claim 4-6, it is characterized in that, the arrangement mode of described vibrational system is following arbitrary: be followed successively by piezoelectric patches (2), centring disk (3), vibrating diaphragm (4), voice coil loudspeaker voice coil (5) from top to bottom; Or, be followed successively by vibrating diaphragm (4), piezoelectric patches (2), centring disk (3), voice coil loudspeaker voice coil (5) from top to bottom; Or, be followed successively by piezoelectric patches (2), vibrating diaphragm (4), centring disk (3), voice coil loudspeaker voice coil (5) from top to bottom.
8. device according to claim 7, it is characterized in that, described centring disk (3) thereon surface is provided with two the second pads (34) be electrically connected with described piezoelectric patches (2) and is provided with two the first pads (32) be electrically connected with described voice coil loudspeaker voice coil (5) at its lower surface.
9. device according to claim 8, it is characterized in that, the center of described vibrating diaphragm (4) is provided with opening, described centring disk (3) comprises central part (301), outer shroud (303), and connecting the connecting portion (302) of described central part (301) and outer shroud (302), described first pad (32) and the second pad (34) are arranged at the central part of described centring disk.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520333132.6U CN204652640U (en) | 2015-05-21 | 2015-05-21 | A kind of electro-acoustic conversion device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520333132.6U CN204652640U (en) | 2015-05-21 | 2015-05-21 | A kind of electro-acoustic conversion device |
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| CN204652640U true CN204652640U (en) | 2015-09-16 |
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| CN201520333132.6U Active CN204652640U (en) | 2015-05-21 | 2015-05-21 | A kind of electro-acoustic conversion device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104902393A (en) * | 2015-05-21 | 2015-09-09 | 歌尔声学股份有限公司 | Electroacoustic conversion device |
| WO2020181890A1 (en) * | 2019-03-14 | 2020-09-17 | 歌尔股份有限公司 | Double-sided miniature sound emitting device and electronic product |
-
2015
- 2015-05-21 CN CN201520333132.6U patent/CN204652640U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104902393A (en) * | 2015-05-21 | 2015-09-09 | 歌尔声学股份有限公司 | Electroacoustic conversion device |
| WO2016184080A1 (en) * | 2015-05-21 | 2016-11-24 | 歌尔声学股份有限公司 | Electro-acoustic transducing device |
| CN104902393B (en) * | 2015-05-21 | 2018-12-14 | 歌尔股份有限公司 | A kind of electro-acoustic conversion device |
| US10219080B2 (en) | 2015-05-21 | 2019-02-26 | Goertek, Inc. | Electrical-acoustic transformation device |
| WO2020181890A1 (en) * | 2019-03-14 | 2020-09-17 | 歌尔股份有限公司 | Double-sided miniature sound emitting device and electronic product |
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Address after: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |