CN212259323U - Bone conduction speaker composite washer magnetic circuit assembly - Google Patents
Bone conduction speaker composite washer magnetic circuit assembly Download PDFInfo
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- CN212259323U CN212259323U CN202022096141.1U CN202022096141U CN212259323U CN 212259323 U CN212259323 U CN 212259323U CN 202022096141 U CN202022096141 U CN 202022096141U CN 212259323 U CN212259323 U CN 212259323U
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- voice coil
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- washer
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Abstract
A bone conduction speaker composite washer magnetic circuit component relates to the technical field of audio devices and comprises a yoke iron and a voice coil, wherein a cylindrical composite member is arranged in the middle of the yoke iron; the composite component is formed by sequentially laminating a lower magnet, a composite washer and an upper magnet from bottom to top, the upper end of the upper magnet is provided with a vibrating diaphragm, the voice coil is arranged on the vibrating diaphragm through a framework, the composite component penetrates through the inner ring of the voice coil, and the composite component and the voice coil are in clearance fit; the lower magnet and the upper magnet are both permanent magnets, and the polarity of the upper end of the lower magnet is consistent with that of the lower end of the upper magnet; the composite washer is formed by alternately laminating a ferromagnetic washer and a non-ferromagnetic washer from bottom to top. The utility model provides a subassembly, low frequency harmonic distortion is little to high frequency response is wide.
Description
Technical Field
The utility model relates to an audio frequency device's technique especially relates to a compound china department magnetic circuit subassembly's of bone conduction speaker technique.
Background
The traditional bone conduction loudspeaker adopts a single washer, and because the magnetic lines of force in the gap between the washer and the yoke are not all in the horizontal direction, the magnetic lines of force on the upper part and the lower part of the voice coil have certain included angles with the horizontal direction and are asymmetric. When an alternating electrical signal is passed through the voice coil, the voice coil will vibrate up and down in the gap according to the ampere-fold theorem. For low-frequency signals, the vibration amplitude of the voice coil is large, and the whole voice coil enters the non-horizontal asymmetric magnetic field on the upper portion and the lower portion of the voice coil more frequently, so that large harmonic distortion is caused. The conventional way to solve this problem is to increase the thickness of the magnetically conductive washer so that the voice coil vibrates in the horizontal magnetic field as much as possible. However, since the washer is made of magnetic material, the thickness of the washer is increased, which causes the increase of the whole self-inductance coefficient of the bone conduction speaker and the large high-frequency attenuation.
SUMMERY OF THE UTILITY MODEL
To the defect that exists among the above-mentioned prior art, the utility model aims to solve the technical problem that a low frequency harmonic distortion is little is provided to the compound china magnetic circuit subassembly of the wide bone conduction speaker of high frequency response.
In order to solve the technical problem, the utility model provides a compound china department magnetic circuit subassembly of bone conduction speaker, including yoke, voice coil loudspeaker voice coil, its characterized in that: a cylindrical composite member is arranged in the middle of the yoke;
the composite component is formed by sequentially laminating a lower magnet, a composite washer and an upper magnet from bottom to top, the upper end of the upper magnet is provided with a vibrating diaphragm, the voice coil is arranged on the vibrating diaphragm through a framework, the composite component penetrates through the inner ring of the voice coil, and the composite component and the voice coil are in clearance fit;
the lower magnet and the upper magnet are both permanent magnets, and the polarity of the upper end of the lower magnet is consistent with that of the lower end of the upper magnet;
the composite washer is formed by alternately laminating N +1 ferromagnetic washers and N non-ferromagnetic washers from bottom to top, wherein N is more than or equal to 1.
The utility model provides a compound china department magnetic circuit subassembly of bone conduction speaker adopts the mode of adding non-ferromagnetic china department between the ferromagnetic china department to constitute compound china department to increase china department thickness, thereby can increase the height of crossing the horizontal magnetic field of voice coil loudspeaker voice coil, reduce the harmonic distortion of bone conduction speaker at the low frequency band; and because the total thickness of the ferromagnetic washer is not actually increased and the split washer is no longer in the middle of the voice coil, the self-inductance of the bone conduction loudspeaker is reduced, and the high-frequency response is expanded.
Drawings
Fig. 1 is a schematic structural diagram of a composite washer magnetic circuit assembly of a bone conduction speaker according to an embodiment of the present invention.
Detailed Description
The following description is provided for further details of the embodiments of the present invention with reference to the accompanying drawings, but this embodiment is not intended to limit the present invention, and all similar structures and similar variations thereof adopted by the present invention should be included in the protection scope of the present invention.
As shown in fig. 1, the composite washer magnetic circuit assembly for a bone conduction speaker provided by the embodiment of the present invention includes a yoke 1 and a voice coil 7, wherein a cylindrical composite member is disposed in the middle of the yoke 1;
the composite component is formed by sequentially laminating a lower magnet 2, a composite washer and an upper magnet 6 from bottom to top, a vibrating diaphragm 8 is arranged at the upper end of the upper magnet 6, a voice coil 7 is arranged on the vibrating diaphragm 8 through a framework 9, the composite component penetrates through the inner ring of the voice coil 7, and the composite component and the voice coil 7 are in clearance fit;
the lower magnet 2 and the upper magnet 6 are both permanent magnets, and the polarity of the upper end of the lower magnet is consistent with that of the lower end of the upper magnet;
the composite washer is formed by alternately laminating two ferromagnetic washers 3 and 5 and a non-ferromagnetic washer 4 from bottom to top, wherein the non-ferromagnetic washers can be made of non-ferromagnetic materials such as copper, aluminum and plastic, and the ferromagnetic washers can be made of ferromagnetic materials such as iron and iron alloy.
The utility model discloses in other embodiments, compound china department also can be formed by supreme range upon range of in turn from down by a plurality of ferromagnetism china departments and a plurality of non-ferromagnetism china departments, but the quantity of ferromagnetism china department should be one more than the quantity of non-ferromagnetism china department, makes the upper and lower both ends of compound china department be the ferromagnetism china department like this.
The embodiment of the utility model provides a theory of operation as follows:
magnetic lines of force (dotted lines with arrows in fig. 1) are emitted from the lower magnet 2 and the upper magnet 6, pass through the two ferromagnetic washers 3 and 5, respectively, and enter the yoke 1 through the voice coil 7, wherein a part of the magnetic lines of force returns to the bottom of the lower magnet 2 through the yoke 1, and the other part of the magnetic lines of force returns to the top of the upper magnet 6 through the space.
The upper end and the lower end of the composite washer are both ferromagnetic washers, the middle of the composite washer is a non-ferromagnetic washer, after the composite washer is adopted, the height of a horizontal magnetic field traversing through the voice coil can be doubled, harmonic distortion and abnormal sound of the bone conduction loudspeaker in a low frequency band can be reduced, for a user, the vibration sense is obviously reduced in the practical sense, and the comfort level is obviously improved; and because the total thickness of the ferromagnetic washer is not actually increased and the washer is divided into two parts and is no longer in the middle of the voice coil, the self-inductance coefficient of the bone conduction loudspeaker is reduced, so that the high-frequency response of more than 10KHz is expanded and improved.
Claims (1)
1. The utility model provides a compound china department magnetic circuit subassembly of bone conduction speaker, includes yoke, voice coil loudspeaker voice coil, its characterized in that: a cylindrical composite member is arranged in the middle of the yoke;
the composite component is formed by sequentially laminating a lower magnet, a composite washer and an upper magnet from bottom to top, the upper end of the upper magnet is provided with a vibrating diaphragm, the voice coil is arranged on the vibrating diaphragm through a framework, the composite component penetrates through the inner ring of the voice coil, and the composite component and the voice coil are in clearance fit;
the lower magnet and the upper magnet are both permanent magnets, and the polarity of the upper end of the lower magnet is consistent with that of the lower end of the upper magnet;
the composite washer is formed by alternately laminating N +1 ferromagnetic washers and N non-ferromagnetic washers from bottom to top, wherein N is more than or equal to 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022096141.1U CN212259323U (en) | 2020-09-23 | 2020-09-23 | Bone conduction speaker composite washer magnetic circuit assembly |
| PCT/CN2021/080886 WO2022062332A1 (en) | 2020-09-23 | 2021-03-15 | Composite washer magnetic circuit assembly of bone conduction speaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022096141.1U CN212259323U (en) | 2020-09-23 | 2020-09-23 | Bone conduction speaker composite washer magnetic circuit assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212259323U true CN212259323U (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022096141.1U Active CN212259323U (en) | 2020-09-23 | 2020-09-23 | Bone conduction speaker composite washer magnetic circuit assembly |
Country Status (1)
| Country | Link |
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| CN (1) | CN212259323U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022062332A1 (en) * | 2020-09-23 | 2022-03-31 | 苏州登堡电子科技有限公司 | Composite washer magnetic circuit assembly of bone conduction speaker |
| CN114598975A (en) * | 2022-03-17 | 2022-06-07 | 苏州登堡电子科技有限公司 | Double-magnet bone conduction loudspeaker |
-
2020
- 2020-09-23 CN CN202022096141.1U patent/CN212259323U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022062332A1 (en) * | 2020-09-23 | 2022-03-31 | 苏州登堡电子科技有限公司 | Composite washer magnetic circuit assembly of bone conduction speaker |
| CN114598975A (en) * | 2022-03-17 | 2022-06-07 | 苏州登堡电子科技有限公司 | Double-magnet bone conduction loudspeaker |
| CN114598975B (en) * | 2022-03-17 | 2024-03-19 | 苏州登堡电子科技有限公司 | Double-magnet bone conduction loudspeaker |
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