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Double-magnet bone conduction loudspeaker

A technology of bone conduction speakers and magnets, applied in the direction of sensors, loudspeakers, electrical components, etc., can solve the problems of uneven magnetic induction field, magnetic flux leakage, and decrease of magnetic field strength

Pending Publication Date: 2022-06-07
SUZHOU TENBON ELECTRONIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing bone conduction speakers have only one magnet, and the magnetic induction field passing through the coil is uneven and divergent. At the same time, magnetic flux leakage may form in the magnetic circuit, that is, more magnetic induction fields leak out of the magnetic gap, failing Through the coil, so that the magnetic field strength at the coil position decreases, affecting the sensitivity of the speaker

Method used

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  • Double-magnet bone conduction loudspeaker
  • Double-magnet bone conduction loudspeaker
  • Double-magnet bone conduction loudspeaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1, as figure 1 As shown, the main body 27 includes a first mounting portion, a second mounting portion and a connecting portion, and both the first mounting portion and the second mounting portion are fixedly connected with the connecting portion. The shapes of the main body 27 and the vibrating piece 28 match the shape of the dual-magnet magnetic circuit structure. If the yoke 4 and the dual-magnet magnetic circuit structure are both cylindrical structures, the first mounting portion and the second mounting portion are both annular structures. , both the first mounting part and the second mounting part are vertically connected with the connecting part, the first mounting part and the second mounting part are both facing the same direction, and the central axes of the first mounting part and the second mounting part are both aligned with the double-magnet magnetic The central axis of the road structure is collinear. The first installation part is sleeved betwee...

Embodiment 2

[0048] Example 2, as image 3 As shown, the main body 27 includes a first mounting portion, a second mounting portion and a connecting portion, and both the first mounting portion and the second mounting portion are fixedly connected with the connecting portion. The shapes of the main body 27 and the vibrating piece 28 match the shape of the dual-magnet magnetic circuit structure. If the yoke 4 and the dual-magnet magnetic circuit structure are both cylindrical structures, the first mounting portion and the second mounting portion are both annular structures. , the first installation part and the second installation part are connected vertically with the connection part, the first installation part and the second installation part are facing different directions, and the central axes of the first installation part and the second installation part are both connected with the double magnet magnetic The central axis of the road structure is collinear. The first mounting part is ...

Embodiment 3

[0050] Example 3, as Figure 4 As shown, the first magnet 1, the second magnet 2 and the non-magnetically conductive washer 3 are all provided with a plurality of first through holes, and the dual magnets 10 are provided with through-holes through the first magnet 1, the second magnet 2 and the non-magnetically conductive washer 3 The multiple first through holes of the washer 3; the positions of the first magnet 1, the second magnet 2 and the multiple first through holes on the non-magnetically conductive washer 3 are in one-to-one correspondence, and each first through hole is The sleeve is provided with a first positioning pin 6 . Avoid the phenomenon of horizontal rotation dislocation when the first magnet 1 and the second magnet 2 are repulsed during the installation process when the first magnet 1 and the second magnet are press-fitted and connected to the non-magnetically conductive washer 3, thereby improving the dual The stability of the magnet 10 structure.

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PUM

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Abstract

The invention relates to a double-magnet bone conduction loudspeaker which comprises a double-magnet magnetic circuit structure, a main body and a vibrating reed, and the double-magnet magnetic circuit structure comprises double magnets, a magnet yoke and a coil. A mounting groove is formed in the magnet yoke, the double magnets are arranged in the mounting groove, a magnetic gap is formed between the magnet yoke and the double magnets, the double magnets comprise a first magnet, a second magnet and a non-magnetic washer, the non-magnetic washer is stacked between the first magnet and the second magnet, and the opposite surfaces of the first magnet and the second magnet have the same magnetism. The vibrating reed is connected with the double-magnet magnetic circuit structure, the main body is connected with the vibrating reed, and the coil is arranged on the main body and located in the magnetic gap. The non-magnetic washer effectively reduces the self-inductance coefficient of the loudspeaker, thereby effectively improving the high-frequency response. The increase of the thickness of the washer does not cause the increase of the self-inductance coefficient of the loudspeaker, so that the thickness of the non-magnetic washer can be as thick as possible under the condition of satisfying the magnetic field intensity, thereby improving the height of a horizontal magnetic field in a magnetic gap.

Description

technical field [0001] The invention relates to the technical field of bone conduction speakers, in particular to a double-magnet bone conduction speaker. Background technique [0002] Bone conduction speakers convert sound into mechanical vibrations of different frequencies, and transmit sound waves through the human skull, bone labyrinth, inner ear lymph fluid, auger, and auditory center. Compared with the classic sound conduction method that generates sound waves through the diaphragm, bone conduction speakers save many steps of sound wave transmission, and can achieve clear sound reproduction in noisy environments, and sound waves will not be affected by diffusion in the air. others. [0003] The existing bone conduction speaker has only one magnet, and the magnetic induction field passing through the coil is not uniform and divergent. At the same time, magnetic leakage may be formed in the magnetic circuit, that is, a large amount of the magnetic induction field leaks ...

Claims

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Application Information

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IPC IPC(8): H04R9/02H04R9/06
CPCH04R9/025H04R9/06H04R2400/11
Inventor 胡强
Owner SUZHOU TENBON ELECTRONIC TECH CO LTD