CN201616900U - Miniature moving coil type acoustic generator - Google Patents
Miniature moving coil type acoustic generator Download PDFInfo
- Publication number
- CN201616900U CN201616900U CN2010201062411U CN201020106241U CN201616900U CN 201616900 U CN201616900 U CN 201616900U CN 2010201062411 U CN2010201062411 U CN 2010201062411U CN 201020106241 U CN201020106241 U CN 201020106241U CN 201616900 U CN201616900 U CN 201616900U
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- shell
- coil type
- magnet
- miniature moving
- acoustical generator
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- 230000002093 peripheral effect Effects 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 208000032041 Hearing impaired Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
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Abstract
The utility model provides a miniature moving coil type acoustic generator which comprises a shell, a diaphragm, a voice coil, a magnetic circuit system and a front cover. The periphery of the diaphragm is fixed on the shell, and the voice coil is combined at the central part of the diaphragm; the magnetic circuit system comprises a magnetic conduction plate, a magnetic and a gasket which are sequentially arranged in the shell in a fixed manner; through holes are arranged in the center of the magnet and the gasket; the magnetic conduction plate, the magnetic and the gasket form a magnetic gap of the miniature moving coil type acoustic generator; the voice coil is arranged in the magnetic gap, and the front cover is arranged on the shell; the magnetic circuit system, the diaphragm and the voice coil are encapsulated at the inner part, wherein the length of the magnet along the direction of a long shaft of the shell is larger than that of the shell along the direction of a short shaft. According to the above structure, at the same time as the miniature and structural intensity of the miniature moving coil type acoustic generator is ensured, the size of the magnet is increased, the sensitivity is enhanced, the resonant frequency is lowered, and the acoustic performance is improved.
Description
Technical field
The utility model relates to a kind of miniature moving-coil type acoustical generator, more particularly, relates to a kind of miniature moving-coil type acoustical generator that can increase magnet size, improve sensitivity, reduce resonance frequency and improve acoustical behavior.
Background technology
Along with the development in portable consumer electronic product market, electronic installations such as miniature moving-coil type acoustical generator have obtained using widely.Fig. 6 is the cutaway view of the miniature moving-coil type acoustical generator of expression prior art.As shown in Figure 6, a kind of miniature moving-coil type acoustical generator that has the rectangle structure of listening help circle, it comprises auxiliary system, magnetic circuit system and vibrational system.Described auxiliary system comprises metal bezel 11 and plastic casing 12, wherein, is provided with groove in shell 12, is used to install described magnetic circuit system and vibrational system, and protecgulum 11 covers on shell 12, and described magnetic circuit system and vibrational system are encapsulated.Described magnetic circuit system comprises pad 31 ', magnet 32 ' and magnetic conductive board 33, wherein, magnetic conductive board 33, magnet 32 ' and pad 31 ' are according to also stacked in the groove in the order embedding shell 12 from top to bottom shown in the figure, and, magnet 32 ' is surrounded fixing by the interior groove that contracts, thereby forms the annular magnetic gap.Described magnetic circuit system is the external magnetic circuit structure.Described vibrational system comprises vibrating diaphragm 21 and the voice coil loudspeaker voice coil 22 that combines with the middle body of vibrating diaphragm 21, and wherein, voice coil loudspeaker voice coil 22 is in the described magnetic gap.In addition, described auxiliary system also comprises attached to the listening help circle on the protecgulum 11 4 and attached to the wiring board 5 of shell 12 bottoms, wherein, listening help circle 4 can help the Hearing Impaired to hear sound by equipment such as hearing aidss, and wiring board 5 then is used for being electrically connected with lead-in wire (not shown) and external electronic circuits on voice coil loudspeaker voice coil 22, the listening help circle 4.
Fig. 7 is the vertical view of the concrete structure of the shell of miniature moving-coil type acoustical generator of expression prior art and magnetic circuit system.As shown in Figure 7, in having the miniature moving-coil type acoustical generator of this structure, because the microminiaturization that need reserve enough installing spaces and keep the miniature moving-coil type acoustical generator for wiring board 5, so magnetic circuit system generally need adopt circle, runway shape or the ellipse etc. can be at the non-square magnetic structure of the both sides slot milling of the shell minor axis shown in the described vertical view.But adopt the words of this non-square magnetic structure, either side in the both sides of the shell major axis shown in the described vertical view, owing to need to maintain a certain distance to guarantee the structural strength of described miniature moving-coil type acoustical generator between the side of shell and the periphery of magnet, so just limited the size of magnet 32 ', thereby cause this miniature moving-coil type acoustical generator distortion with traditional structure bigger, be unfavorable for the reduction of miniature moving-coil type acoustical generator resonance frequency and the improvement of acoustical behavior.
So be necessary above-mentioned miniature moving-coil type acoustical generator with traditional structure is further improved, to address the above problem.
The utility model content
The utility model is to make in order to solve the above-mentioned technical problem that exists in the prior art, its purpose is to provide a kind of miniature moving-coil type acoustical generator, in the microminiaturization and structural strength that guarantee described miniature moving-coil type acoustical generator, can increase its magnet size, improve its sensitivity, reduce its resonance frequency, thereby improve its acoustical behavior.
To achieve these goals, provide a kind of miniature moving-coil type acoustical generator, it comprises: shell; Vibrating diaphragm, its periphery are fixed on the described shell; Voice coil loudspeaker voice coil is combined in the central portion of described vibrating diaphragm; Magnetic circuit system, it comprises magnetic conductive board, magnet and the pad that is fixedly mounted on successively in the described shell, is provided with through hole in the central authorities of described magnet and pad, and described magnetic conductive board, magnet and pad form the magnetic gap of described miniature moving-coil type acoustical generator, and described voice coil loudspeaker voice coil is positioned at described magnetic gap; And protecgulum, be installed on the described shell, described magnetic circuit system and vibrating diaphragm, voice coil loudspeaker voice coil are enclosed in inside; Wherein, described magnet along the length of the long axis direction of described shell greater than length along the short-axis direction of described shell.
At this, preferably, the side along the long axis direction of described shell of described magnet comprises straight line portion at least.
In addition, preferred construction is, the side along the short-axis direction of described shell of described magnet is camber line shapes such as circular arc or ellipse arc.
In addition, preferably, the side along the short-axis direction of described shell of described magnet comprises straight line portion at least; Further, the peripheral shape of described magnet is a rectangle.
In addition, preferably, described magnetic gap be shaped as annular, oval ring or runway annular.
In addition, preferably, between described vibrating diaphragm and described shell, also be provided with listening help circle.
In addition, preferably, described magnetic circuit system is the external magnetic circuit structure.
According to said structure, because the side along the long axis direction of described shell of described magnet is a straight flange, magnet arrangement with circle is compared, described magnet size is increased, so, when guaranteeing microminiaturization of miniature moving-coil type acoustical generator and structural strength, can increase its magnet size, improve its sensitivity, reduce its resonance frequency and improve its acoustical behavior.
Description of drawings
Fig. 1 is the exploded perspective view of the miniature moving-coil type acoustical generator that relates to of first embodiment of the present utility model.
Fig. 2 is the cutaway view of this miniature moving-coil type acoustical generator of expression.
Fig. 3 is the vertical view of the concrete structure of expression shell of this miniature moving-coil type acoustical generator and magnetic circuit system.
Fig. 4 is the vertical view of the concrete structure of the magnet that uses in this miniature moving-coil type acoustical generator of expression.
Fig. 5 is the vertical view of the concrete structure of the magnet that uses in the miniature moving-coil type acoustical generator that relates to of expression second embodiment of the present utility model.
Fig. 6 is the cutaway view of the miniature moving-coil type acoustical generator of expression prior art.
Fig. 7 is the vertical view of the concrete structure of the shell of miniature moving-coil type acoustical generator of expression prior art and magnetic circuit system.
Embodiment
Below, describe various embodiment of the present utility model in conjunction with the accompanying drawings in detail.
In the following detailed description, just put down in writing some one exemplary embodiment of the present utility model.Undoubtedly, those of ordinary skill in the art can recognize, can revise described embodiment with various mode and do not depart from spirit and scope of the present utility model.Therefore, accompanying drawing is illustrative with being described in essence, rather than is used to limit the protection range of claim.In addition, in this manual, identical Reference numeral is represented identical part.
[first embodiment]
Fig. 1 is the exploded perspective view of the miniature moving-coil type acoustical generator that relates to of expression first embodiment of the present utility model, and Fig. 2 is the cutaway view of this miniature moving-coil type acoustical generator of expression.As depicted in figs. 1 and 2, the miniature moving-coil type acoustical generator that relates to of first embodiment of the present utility model comprises auxiliary system, magnetic circuit system and vibrational system.Described auxiliary system comprises protecgulum 11, shell 12, wherein, the understructure with rectangle profile that shell 12 is to use plastics for example etc. to make, its middle part is provided with groove so that described magnetic circuit system and vibrational system to be installed, and also is provided with the wire hole that is used to draw lead.Protecgulum 11 is to be made and shape and shell 12 corresponding members by for example metal, and sound hole on it is used to make sound to send, and there is braced wing its side, is used to be supported on shell 12.Protecgulum 11 can be installed on the shell 12, and described magnetic circuit system and vibrational system are enclosed in inside.Described magnetic circuit system comprises pad 31a, magnet 32a and magnetic conductive board 33, wherein, magnet 32a has the shape of cutting edge in the endless belt, pad 31a has the corresponding shape with magnet 32a, and magnetic conductive board 33 is circular, possesses circular convex at the middle part, and magnetic conductive board 33, magnet 32a and pad 31a are embedded into according to the order from top to bottom shown in the figure in the groove of shell 12 and stack up, and magnet 32a is surrounded fixing by the groove that contracts in the shell 13, thereby forms the annular magnetic gap.This magnetic circuit system is the external magnetic circuit structure.Described vibrational system comprises vibrating diaphragm 21 and voice coil loudspeaker voice coil 22, and wherein, the periphery of vibrating diaphragm 21 is fixed on the shell 12, and the voice coil loudspeaker voice coil 22 of hollow cylindrical and the middle body of vibrating diaphragm 21 combine, and voice coil loudspeaker voice coil 22 is in the described magnetic gap.
In addition, described auxiliary system also comprises in protecgulum 11 zone between the edge and vibrating diaphragm 21 peripheries and attached to the listening help circle on the protecgulum 11 4 and attached to the wiring board on the bottom of shell 12 5, wherein, listening help circle 4 can help the Hearing Impaired to hear the sound of enhancing by equipment such as hearing aidss, wiring board 5 be used for voice coil loudspeaker voice coil 22, listening help circle 4 on lead-in wire and external electronic circuits (its circuit structure etc. for well-known technology, do not repeat them here) be electrically connected.
Fig. 3 is the vertical view of concrete structure of shell and the magnetic circuit system of this miniature moving-coil type acoustical generator of expression, and Fig. 4 is a vertical view of representing the concrete structure of the magnet that uses in this miniature moving-coil type acoustical generator.As shown in Figure 3 and Figure 4, described magnetic circuit system and shell 12 combine by one-body molded, and wherein, magnet 32a is surrounded by the interior puncture groove in the shell 12 and be fixing.Pad 31a and magnet 32a are formed with the vertical cut limit of both sides along the long axis direction of shell 12, and two ends are camber line shapes such as circular arc or ellipse arc in addition.That is, in the present embodiment, pad 31a and magnet 32a with described shape form by the periphery cutting to annular gasket and magnet.In addition, wiring board 5 is electrically connected with the lead-in wire and the external electronic circuits of voice coil loudspeaker voice coil 22 and listening help circle 4 simultaneously, so its size and needed installing space are bigger.Adopt above-mentioned design of the present invention, can reserve the size that enough installing spaces can not increase the miniature moving-coil type acoustical generator for wiring board 5.In addition,, make described side cut parallel, can increase the size of magnet 32a effectively with the major axis of shell 12 by magnet 32a is cut edge, thus increase the miniature moving-coil type acoustical generator sensitivity, reduce its distortion and resonance frequency, and improve its acoustical behavior.Moreover in this design, the both sides at the major axis of shell 12 can keep a determining deviation between the side of shell 12 and the side cut of magnet, so can not change the structural strength of the shell 12 of described miniature moving-coil type acoustical generator in its major axis two side portions.
[second embodiment]
Fig. 5 is the vertical view of the concrete structure of the magnet that uses in the miniature moving-coil type acoustical generator that relates to of expression second embodiment of the present utility model.Present embodiment and Fig. 1 are that to the difference of first embodiment shown in Figure 4 as shown in Figure 5, the periphery of pad 31a (not shown) and magnet 32a is a rectangle, and the endoporus of its central portion is circular.In addition, other structures of present embodiment are identical with described first embodiment, omit so it is described.
Adopt this design can realize the effect of described first embodiment equally.
In addition, those skilled in the art can be easy to expect that the periphery of above-mentioned magnet 32a also can be prismatic, polygon etc.In addition, the side along the long axis direction of described shell of magnet also can be the broken line shape that is made of many straight line portioies.
In each embodiment of the present utility model, the miniature moving-coil type acoustical generator of band listening help circle only is preferred product structure.In addition, wiring board 5 also can replace with other electric connecting parts such as flexure strips; Protecgulum 11 also can be made by plastics etc.; Shell 12 also can have square contour; Pad 31a can be not corresponding mutually with the shape of magnet 32a yet, but have different structures.In addition, by changing the structure and the shape of magnetic conductive board, magnet and pad, what can make described magnetic gap is shaped as annular, oval ring or runway annular.These variations are included within claims of the present utility model.In addition, can carry out various corrections, combination to each embodiment of the present utility model and do not depart from the determined spirit and scope of the present utility model of appended claims book.
Claims (10)
1. a miniature moving-coil type acoustical generator is characterized in that, comprising:
Shell is for having the understructure of rectangle profile;
Vibrating diaphragm, its periphery are fixed on the described shell;
Voice coil loudspeaker voice coil is combined in the central portion of described vibrating diaphragm;
Magnetic circuit system, it comprises magnetic conductive board, magnet and the pad that is fixedly mounted on successively in the described shell, is provided with through hole in the central authorities of described magnet and pad, and described magnetic conductive board, magnet and pad form the magnetic gap of described miniature moving-coil type acoustical generator, and described voice coil loudspeaker voice coil is positioned at described magnetic gap; And
Protecgulum is installed on the described shell, and described magnetic circuit system and vibrating diaphragm, voice coil loudspeaker voice coil are enclosed in inside;
Wherein, described magnet along the length of the long axis direction of described shell greater than length along the short-axis direction of described shell.
2. miniature moving-coil type acoustical generator according to claim 1 is characterized in that,
The side along the long axis direction of described shell of described magnet comprises straight line portion at least.
3. miniature moving-coil type acoustical generator according to claim 1 is characterized in that,
The side along the short-axis direction of described shell of described magnet is a camber line shape.
4. miniature moving-coil type acoustical generator according to claim 3 is characterized in that,
The side along the short-axis direction of described shell of described magnet is a circular arc.
5. miniature moving-coil type acoustical generator according to claim 3 is characterized in that,
The side along the short-axis direction of described shell of described magnet is an ellipse arc.
6. miniature moving-coil type acoustical generator according to claim 1 is characterized in that,
The side along the short-axis direction of described shell of described magnet comprises straight line portion at least.
7. miniature moving-coil type acoustical generator according to claim 3 is characterized in that,
The peripheral shape of described magnet is a rectangle.
8. miniature moving-coil type acoustical generator according to claim 1 is characterized in that,
Described magnetic gap be shaped as annular, oval ring or runway annular.
9. according to each described miniature moving-coil type acoustical generator in the claim 1 to 8, it is characterized in that,
Between described vibrating diaphragm and described shell, also be provided with listening help circle.
10. miniature moving-coil type acoustical generator according to claim 1 is characterized in that,
Described magnetic circuit system is the external magnetic circuit structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201062411U CN201616900U (en) | 2010-02-02 | 2010-02-02 | Miniature moving coil type acoustic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201062411U CN201616900U (en) | 2010-02-02 | 2010-02-02 | Miniature moving coil type acoustic generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201616900U true CN201616900U (en) | 2010-10-27 |
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ID=43003261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201062411U Expired - Lifetime CN201616900U (en) | 2010-02-02 | 2010-02-02 | Miniature moving coil type acoustic generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201616900U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114653568A (en) * | 2022-04-08 | 2022-06-24 | 汉得利（常州）电子股份有限公司 | Vibration assembly and tactile exciter with same |
-
2010
- 2010-02-02 CN CN2010201062411U patent/CN201616900U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114653568A (en) * | 2022-04-08 | 2022-06-24 | 汉得利（常州）电子股份有限公司 | Vibration assembly and tactile exciter with same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee after: Goertek Inc. Address before: 261031 Dongfang Road, Weifang high tech Industrial Development Zone, Shandong, China, No. 268 Patentee before: Goertek Inc. |
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| CX01 | Expiry of patent term |
Granted publication date: 20101027 |
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| CX01 | Expiry of patent term |