CN201797595U - Moving coil type electro-acoustic transducer - Google Patents
Moving coil type electro-acoustic transducer Download PDFInfo
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- CN201797595U CN201797595U CN2010205174971U CN201020517497U CN201797595U CN 201797595 U CN201797595 U CN 201797595U CN 2010205174971 U CN2010205174971 U CN 2010205174971U CN 201020517497 U CN201020517497 U CN 201020517497U CN 201797595 U CN201797595 U CN 201797595U
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- acoustic conversing
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Abstract
The utility model provides a moving coil type electro-acoustic transducer which comprises a vibration system, a magnetic circuit system and a housing for fixing the vibration system and the magnetic circuit system correspondingly. The moving coil type electro-acoustic transducer can improve the limitations of magnetic flux and an effective vibration area of a vibrating diaphragm of the traditional moving coil type electro-acoustic transducer with certain dimension, improve the output acoustical performance of the moving coil type electro-acoustic transducer and reduce the resonance frequency.
Description
Technical field
The utility model relates to the electroacoustic transducer technical field, specifically, relates to a kind of moving-coil type electro-acoustic conversing device.
Background technology
Along with the development of various electronic products, a large amount of electro-acoustic transducer device particularly moving-coil type electro-acoustic conversing device has obtained using widely.The operation principle of well-known moving-coil type electro-acoustic conversing device is, the voice coil loudspeaker voice coil that is connected with alternating current is subjected to Lorentz force and makes vibration on the vibrational system generation vertical direction of moving-coil type electro-acoustic conversing device and sounding in magnetic field.
At present, be applied in the moving-coil type electro-acoustic conversing device of electronic components such as LCD TV, known, for the occupied space of the size that reduces electroacoustic transducer and promote operating power, generally it is designed to strip, the vibrating diaphragm of product structure inside and magnetic circuit system part all are designed to strip, and voice coil loudspeaker voice coil need be designed to long narrow voice coil tube.But there are a lot of defectives in the moving-coil type electro-acoustic conversing device of traditional structures such as this strip, and under the certain situation of moving-coil type electro-acoustic conversing device size, the size of magnet is restricted, and has limited the further raising of magnetic flux; And because effective vibration sounding position of vibrating diaphragm is actually the rigid element at center, the flexible ring at its edge has partly taken a large amount of dimensional space, and effective vibration sounding zone of vibrating diaphragm reduces significantly, and this can sacrifice the power of product to a great extent.Particularly constantly dwindle in strip moving-coil type electro-acoustic conversing device product size, especially under the situation that the width of product reduces, above-mentioned two kinds of defectives can be more obvious.
So, be necessary the moving-coil type electro-acoustic conversing device of said structure is further improved, to avoid above-mentioned defective.
The utility model content
The utility model is made in order to solve above-mentioned problems of the prior art, its purpose is to provide a kind of miniature moving-coil type electroacoustic transducer that has improved vibrational system and magnetic circuit system, the moving-coil type electro-acoustic conversing device that improves traditional structure magnetic flux and vibrating diaphragm under the certain situation of size effectively vibrate the restriction of area, reduce resonance frequency, the output acoustical behavior of the moving-coil type electro-acoustic conversing device of improvement
To achieve these goals, a kind of moving-coil type electro-acoustic conversing device that the utility model provides, a kind of moving-coil type electro-acoustic conversing device, the shell of involving vibrations system, magnetic circuit system and corresponding fixing described vibrational system and magnetic circuit system, and, described magnetic circuit system comprises at least two two magnet that polarity is oppositely arranged, and is provided with between the described magnet at interval, to form the two side of described moving-coil type electro-acoustic conversing device magnetic gap; Described vibrational system comprises vibrating diaphragm and flat voice coil tube, and described vibrating diaphragm comprises central part and supports the flexible ring of the ring-type portion of described central part; Described ring portion for and combine with described central part is airtight, and the body of described ring portion is positioned on the vertical direction on plane, described central part place, the one end combines with the outward flange of described central part, and the other end is the undulate bending extension on the vertical direction on plane, described central part place; Described voice coil tube correspondence is arranged in the described magnetic gap and along described magnetic gap in the vertical direction to be vibrated.
As a kind of improvement, described moving-coil type electro-acoustic conversing device is a strip.
As a kind of improvement, described magnetic circuit system also comprises magnetic conductive board, and described magnetic conductive board is arranged between described shell and the described magnet.
As a kind of improvement, described magnetic circuit system comprises two pairs of magnet that are oppositely arranged respectively.
As a kind of improvement, described magnetic circuit system is the magnet of pair of opposing.
As a kind of improvement, described magnetic conductive board is provided with projection or the bending part near described voice coil tube.
As a kind of improvement, the magnetic pole of described magnet, and the end cross-sectional of projection on the described magnetic conductive board or the corresponding described voice coil tube of bending part difference is corresponding.
As a kind of improvement, the central part of described vibrating diaphragm is a rigid material.
As a kind of improvement, the central part of described vibrating diaphragm is an expanded material.
Taked the moving-coil type electro-acoustic conversing device after the above technology provided by the utility model, than conventional art, improved the miniature moving-coil type electroacoustic transducer of vibrational system and magnetic circuit system, can improve structure in the past the moving-coil type electro-acoustic conversing device product size necessarily especially under the product size situation about reducing the magnetic flux vibrating diaphragm of existing magnetic circuit system effectively vibrate the area smaller defect, thereby when improving moving-coil type electro-acoustic conversing device magnetic flux, increase effective vibration area of vibrating diaphragm, guaranteed the output acoustical behavior of product.
Description of drawings
By below in conjunction with accompanying drawing embodiment being described, above-mentioned feature of the present utility model and technological merit will become apparent and understand easily.
Fig. 1 is the stereogram of the moving-coil type electro-acoustic conversing device that relates to of expression embodiment one;
Fig. 2 is the decomposing schematic representation of this moving-coil type electro-acoustic conversing device of expression;
Fig. 3 is that the A-A of presentation graphs 1 is to cutaway view;
Fig. 4 is the generalized section of the vibrating diaphragm of this moving-coil type electro-acoustic conversing device of expression;
Fig. 5 is the schematic perspective view of the vibrating diaphragm of this moving-coil type electro-acoustic conversing device of expression;
Fig. 6 is the voice coil tube of this moving-coil type electro-acoustic conversing device of expression and the vertical view of voice coil suspension combination;
Fig. 7 is the magnetic circuit system of this moving-coil type electro-acoustic conversing device of expression and the schematic perspective view that voice coil tube, voice coil suspension make up;
Fig. 8 is the generalized section that the magnetic circuit system of this moving-coil type electro-acoustic conversing device of expression combines with voice coil tube, voice coil suspension;
Fig. 9 is the generalized section that the magnetic circuit system of the moving-coil type electro-acoustic conversing device that relates to of expression embodiment two combines with voice coil tube, voice coil suspension;
Figure 10 is the generalized section that the magnetic circuit system of the moving-coil type electro-acoustic conversing device that relates to of expression embodiment three combines with voice coil tube, voice coil suspension.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done further detailed description.
In the following description, only the mode by explanation is described some one exemplary embodiment of the present utility model, undoubtedly, those of ordinary skill in the art can recognize, under the situation that does not depart from spirit and scope of the present utility model, can revise described embodiment with various mode.Therefore, accompanying drawing and be described in just illustratively in essence rather than is used to limit the protection range of claim.In addition, in this manual, identical Reference numeral indicates identical part.
Embodiment one:
Fig. 1 is the stereogram of the moving-coil type electro-acoustic conversing device that relates to of expression present embodiment; Fig. 2 formula is represented the decomposing schematic representation of this moving-coil type electro-acoustic conversing device; Fig. 3 is that the A-A of presentation graphs 1 is to cutaway view.As Fig. 1, Fig. 2 and shown in Figure 3, moving-coil type electro-acoustic conversing device provided by the utility model is the strip structure, mainly comprises shell 1, vibrational system and magnetic circuit system, and shell 1 is in the same place vibrational system and magnetic circuit system secure bond.
Vibrational system comprises the oscillating plate of the strip that is made of the central part 51 of rigidity and flexible ring portion 52 and the drive unit that is made of flat voice coil tube 41 and the corresponding fixedly voice coil suspension 42 of voice coil tube 41.The wherein airtight connection of an end and the centre of support portion 51 of ring portion 52, the other end is fixed on the shell 1, and the body of ring portion 52 is positioned on the vertical direction on plane, central part 51 place, to increase the driving area of central part 51; One end of voice coil suspension 42 is fixed on the central part 51, thereby oscillating plate 5 and drive unit have constituted vibrational system.
Fig. 4 is the generalized section of the vibrating diaphragm of this moving-coil type electro-acoustic conversing device of expression; Fig. 5 is the schematic perspective view of the vibrating diaphragm of this moving-coil type electro-acoustic conversing device of expression.As shown in Figure 4 and Figure 5, in the present embodiment, ring portion 52 is the waveform bending extension, so that vibrating diaphragm 5 has good compliance; Preferred central part 51 is a light material, and as expanded material, ring portion 52 adopts flexible materials such as rubber.This architecture advances design to vibrating diaphragm 5, because on the plane of central part 51 correspondences, ring portion 52 does not take up room, like this under the certain situation of the installation dimension of vibrating diaphragm 5, increased effective vibration area of central part 51, particularly be applied in the vibrating diaphragm and moving-coil type electro-acoustic conversing device of such strip, when width is fixed or reduced under the situation of certain product width, can guarantee moving-coil type electro-acoustic conversing device power by the effective vibration area that increases vibrating diaphragm 5, guarantee acoustical behavior.
Magnetic circuit system comprises two magnetic conductive boards 2 that are oppositely arranged and the two groups of magnet that are provided with at interval 3 up and down that are provided with in magnetic conductive board 2 inside, magnet 3 is strip and extends along the long axis direction of moving-coil type electro-acoustic conversing device, make between two groups of magnet 3 two sidewalls that form long narrow magnetic gap, every group of magnet 3 is oppositely arranged, and its magnetic pole is opposite.Fig. 7 is the magnetic circuit system of this moving-coil type electro-acoustic conversing device of expression and the schematic perspective view that voice coil tube, voice coil suspension make up, Fig. 8 is the generalized section that the magnetic circuit system of this moving-coil type electro-acoustic conversing device of expression combines with voice coil tube, voice coil suspension, as shown in Figure 7 and Figure 8, when described drive unit is installed to the magnetic gap of described magnetic circuit system, two end faces of voice coil tube 41 are respectively towards two sidewalls of long and narrow magnetic gap, when voice coil tube 41 was connected with ac signal by lead 43, voice coil tube 41 was just vibrated along the magnetic gap in the vertical direction of magnetic circuit system.For increasing the actuating force of drive unit, two major axis of the end face of voice coil tube 41 partly lay respectively at the magnetic pole of two groups of magnet 3, and voice coil tube 41 is perpendicular to two sidewalls of magnetic gap, at this moment, the main direct magnetic pole of the magnetic flux of voice coil tube 41 from two groups of magnet that are oppositely arranged 41, can realize bigger power so that be subjected to bigger actuating force in the voice coil tube 41.This magnetic structure designs, and the corresponding flat coil of employing, has saved the inner space of moving-coil type electro-acoustic conversing device, can improve its acoustical behavior by increasing magnet size; Particularly under the restricted situation of moving-coil type electro-acoustic conversing device width dimensions, can keep the good acoustic performance of moving-coil type electro-acoustic conversing device.
Owing to adopted in this implementation process improvement project to vibrational system and magnetic circuit system, when increasing the magnetic flux of moving-coil type electro-acoustic conversing device, increased effective vibration area of vibrating diaphragm, can export higher power, necessarily particularly under the certain situation of width dimensions, properties of product have been guaranteed in the moving-coil type electro-acoustic conversing device size like this.
Embodiment two:
Fig. 9 is the generalized section that the magnetic circuit system of the moving-coil type electro-acoustic conversing device that relates to of expression embodiment two combines with voice coil tube, voice coil suspension; As shown in Figure 9, the main difference of present embodiment and the foregoing description is, magnetic circuit system comprises that one group is oppositely arranged and opposite polarity magnet 3 in the present embodiment, and magnetic conductive board 2 ' with the close end of voice coil tube 41 is provided with and makes magnetic conductive board 2 ' near the projection of voice coil tube 41.In this example, the magnetic flux at the major axis place, voice coil tube 41 upper end of corresponding magnet 3 is mainly from two magnet 3 that are oppositely arranged, and the magnetic flux at lower end major axis place is then mainly by the conduction of assigning to of the jut of magnetic conductive board 2 ' pass through, thereby forms a closed flux path.
This design can be implemented according to the different demands to properties of product equally, can realize the technique effect of above-mentioned implementation process equally, and contrast above-mentioned implementation process, has saved magnet in this implementation process, thereby has reduced production cost.
Embodiment three:
Figure 10 is the generalized section that the magnetic circuit system of the moving-coil type electro-acoustic conversing device that relates to of expression embodiment three combines with voice coil tube, voice coil suspension, as shown in figure 10, this implementation process is magnetic conductive board 2 with the main distinction of above-mentioned implementation process " structure different; the magnetic conductive board 2 of the end cross-sectional correspondence at the major axis place, lower end of voice coil tube 41 in this implementation process " be provided with the bending near voice coil tube 41, magnetic conductive board 2 " bend the magnetic flux that increases major axis place, voice coil tube 41 lower end by this.This design can realize the technique effect of above-mentioned implementation process equally, and can satisfy more production design requirement.
In the enforcement that the utility model is created, the quantity and the position of magnet can be set according to needs to product structure and performance; The moving-coil type electro-acoustic conversing device of strip only is an embodiment preferred; Also can implement vibrating diaphragm in the utility model, can realize the technique effect of above-mentioned implementation process equally according to the structure of different product.
Under above-mentioned instruction of the present utility model; those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description; and these improvement and distortion; all drop in the protection range of the present utility model; those skilled in the art should be understood that; above-mentioned specific descriptions are just better explained the purpose of this utility model, and protection range of the present utility model is limited by claim and equivalent thereof.
Claims (9)
1. moving-coil type electro-acoustic conversing device, the shell of involving vibrations system, magnetic circuit system and corresponding fixing described vibrational system and magnetic circuit system is characterized in that,
Described magnetic circuit system comprises the magnet that at least two polarity are oppositely arranged, and is provided with between the described magnet at interval, to form the two side of described moving-coil type electro-acoustic conversing device magnetic gap;
Described vibrational system comprises vibrating diaphragm and flat voice coil tube, and described vibrating diaphragm comprises central part and supports the flexible ring of the ring-type portion of described central part; Described ring portion and described central part is airtight combines, and the body of described ring portion is positioned on the vertical direction on plane, described central part place, the one end combines with the outward flange of described central part, and the other end is the undulate bending extension on the vertical direction on plane, described central part place;
Described voice coil tube correspondence is arranged in the described magnetic gap and along described magnetic gap in the vertical direction to be vibrated.
2. according to the described moving-coil type electro-acoustic conversing device of claim 1, it is characterized in that,
Described moving-coil type electro-acoustic conversing device is a strip.
3. according to the described moving-coil type electro-acoustic conversing device of claim 2, it is characterized in that,
Described magnetic circuit system also comprises magnetic conductive board, and described magnetic conductive board is arranged between described shell and the described magnet.
4. according to the described moving-coil type electro-acoustic conversing device of claim 3, it is characterized in that,
Described magnetic circuit system comprises two pairs of magnet that are oppositely arranged respectively.
5. according to the described moving-coil type electro-acoustic conversing device of claim 3, it is characterized in that,
Described magnetic circuit system is the magnet of pair of opposing.
6. according to the described moving-coil type electro-acoustic conversing device of claim 5, it is characterized in that,
Described magnetic conductive board is provided with projection or the bending part near described voice coil tube.
7. according to claim 5 or 6 described moving-coil type electro-acoustic conversing devices, it is characterized in that,
The magnetic pole of described magnet, and the end cross-sectional of projection on the described magnetic conductive board or the corresponding described voice coil tube of bending part difference is corresponding.
8. according to the described moving-coil type electro-acoustic conversing device of claim 1, it is characterized in that,
The central part of described vibrating diaphragm is a rigid material.
9. according to the described moving-coil type electro-acoustic conversing device of claim 8, it is characterized in that,
The central part of described vibrating diaphragm is an expanded material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205174971U CN201797595U (en) | 2010-09-01 | 2010-09-01 | Moving coil type electro-acoustic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205174971U CN201797595U (en) | 2010-09-01 | 2010-09-01 | Moving coil type electro-acoustic transducer |
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| Publication Number | Publication Date |
|---|---|
| CN201797595U true CN201797595U (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205174971U Expired - Lifetime CN201797595U (en) | 2010-09-01 | 2010-09-01 | Moving coil type electro-acoustic transducer |
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| Country | Link |
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| CN (1) | CN201797595U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111836175A (en) * | 2020-06-24 | 2020-10-27 | 瑞声科技(新加坡)有限公司 | Micro loudspeaker |
| WO2022062008A1 (en) * | 2020-09-25 | 2022-03-31 | 瑞声声学科技(深圳)有限公司 | Sound production unit and speaker box |
-
2010
- 2010-09-01 CN CN2010205174971U patent/CN201797595U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111836175A (en) * | 2020-06-24 | 2020-10-27 | 瑞声科技(新加坡)有限公司 | Micro loudspeaker |
| CN111836175B (en) * | 2020-06-24 | 2021-09-28 | 瑞声科技(新加坡)有限公司 | Micro loudspeaker |
| WO2022062008A1 (en) * | 2020-09-25 | 2022-03-31 | 瑞声声学科技(深圳)有限公司 | Sound production unit and speaker box |
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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 GoerTek acoustics Limited by Share Ltd, 268 Dongfang Road, hi tech Industrial Development Zone, Shandong, Weifang Patentee after: Goertek Inc. Address before: 261031 GoerTek acoustics Limited by Share Ltd, 268 Dongfang Road, hi tech Industrial Development Zone, Shandong, Weifang Patentee before: Goertek Inc. |
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| CX01 | Expiry of patent term |
Granted publication date: 20110413 |
|
| CX01 | Expiry of patent term |