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Moving-coil type electro-acoustic transducer

An electro-acoustic converter and moving coil technology, applied in the direction of sensors, electrical components, etc., can solve the problems of sacrificing product power, limiting magnetic flux, occupying size space, etc., to ensure the output acoustic performance, increase the effective vibration area, improve The effect of magnetic flux

Inactive Publication Date: 2011-11-23
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many defects in the moving-coil electro-acoustic transducer with traditional structures such as strips. When the size of the moving-coil electro-acoustic transducer is fixed, the size of the magnet is limited, which limits the further improvement of the magnetic flux; and because The effective vibration and sound generation part of the diaphragm is actually the rigid part in the center, and the flexible ring part at the edge occupies a large amount of dimensional space, and the effective vibration and sound generation area of ​​the diaphragm is greatly reduced, which will sacrifice the product to a great extent power of
Especially when the product size of the elongated moving coil electroacoustic transducer is continuously reduced, especially when the product width is reduced, the above two defects will be more obvious

Method used

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Embodiment 1

[0030] figure 1 It is a perspective view showing the moving coil electroacoustic transducer involved in this embodiment; figure 2 The formula represents the decomposition diagram of the dynamic electro-acoustic transducer; image 3 yes means figure 1 A-A to the sectional view. Such as figure 1 , figure 2 and image 3 As shown, the moving coil electroacoustic transducer provided by the present invention has a long strip structure and mainly includes a housing 1, a vibration system and a magnetic circuit system. The housing 1 fixedly combines the vibration system and the magnetic circuit system.

[0031] The vibration system includes a long vibrating plate composed of a rigid central part 51 and a flexible ring part 52 , and a driving device composed of a flat voice coil barrel 41 and a voice coil support 42 correspondingly fixed to the voice coil barrel 41 . Wherein one end of the ring part 52 is airtightly connected and supports the center part 51, and the other end is...

Embodiment 2

[0037] Figure 9 It is a schematic cross-sectional view showing the combination of the magnetic circuit system of the moving-coil electro-acoustic transducer involved in the second embodiment, the voice coil tube and the voice coil support; as Figure 9 As shown, the main difference between this embodiment and the above-mentioned embodiments is that the magnetic circuit system in this embodiment includes a set of oppositely arranged magnets 3 with opposite polarities, and the end of the magnetic guide plate 2' close to the voice coil tube 41 is provided with a Make the magnetic guide plate 2 ′ close to the protrusion of the voice coil barrel 41 . In this example, the magnetic flux at the long axis of the upper end of the voice coil tube 41 corresponding to the magnet 3 mainly comes from the two opposite magnets 3, while the magnetic flux at the long axis of the lower end mainly comes from the protruding part through which the magnetic guide plate 2' passes. Conduction, thus f...

Embodiment 3

[0040] Figure 10 It is a schematic cross-sectional view showing the combination of the magnetic circuit system of the moving coil electro-acoustic transducer involved in the third embodiment, the voice coil cylinder and the voice coil support, as Figure 10 As shown, the main difference between this implementation process and the above-mentioned implementation process is that the structure of the magnetic conductive plate 2 "is different. Close to the bending of the voice coil tube 41, the magnetic guide plate 2" increases the magnetic flux at the long axis of the lower end of the voice coil tube 41 through this bending. This design scheme can also achieve the technical effect of the above-mentioned implementation process, and can satisfy More production design needs.

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Abstract

The invention provides a moving-coil type electro-acoustic transducer, which is used for breaking through the limitation in magnetic flux and effective vibrating area of a vibrating film of the moving-coil type electro-acoustic transducer with a traditional structure under the condition of a specified size, improving the output acoustic property of the moving-coil type electro-acoustic transducer and reducing the vibration frequency.

Description

technical field [0001] The invention relates to the technical field of electroacoustic transducers, in particular to a dynamic electroacoustic transducer. Background technique [0002] With the development of various electronic products, a large number of electroacoustic transducers, especially dynamic electroacoustic transducers, have been widely used. The working principle of the well-known moving-coil electro-acoustic transducer is that the voice coil with alternating current is subjected to Lorentz force in the magnetic field, so that the vibration system of the moving-coil electro-acoustic transducer vibrates in the vertical direction to produce sound. [0003] Currently, moving coil electroacoustic transducers used in electronic parts such as LCD TVs are known to be designed as elongated strips in order to reduce the space occupied by the size of the electroacoustic transducer and increase the working power. The internal diaphragm and the magnetic circuit system are d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R9/06H04R9/02
Inventor 葛连山张成飞刘春发江超
Owner GOERTEK INC
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