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Micro moving-coil type electro-acoustic converter

An electro-acoustic transducer and moving coil technology, applied in the direction of sensors, electrical components, etc., can solve the problems of collision, poor acoustic performance, unfavorable miniaturization of miniature dynamic electro-acoustic transducers, etc., so as to prevent collision and reduce product cost. height effect

Active Publication Date: 2014-01-29
GOERTEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the vibration amplitude of the diaphragm 1 is relatively large, the center of the diaphragm 1 is likely to collide with the inner protrusion in the magnetic circuit system, thereby generating noise and causing poor acoustic performance, which is not conducive to the miniature moving coil electroacoustic Converter Miniaturization

Method used

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  • Micro moving-coil type electro-acoustic converter

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0029] figure 1 It is a three-dimensional exploded view of the miniature dynamic electro-acoustic transducer related to the first embodiment of the present invention. figure 2 is a cross-sectional view showing the internal structure of the micro dynamic electro-acoustic transducer.

[0030] Such as figure 1 and figure 2 As shown, the miniature dynamic electro-acoustic transducer related to the first embodiment of the present invention includes a housing 4, a magnetic circuit system and a vibration system. The housing 4 is a rectangular frame made of, for example, resin, plastic, etc., and a support groove and a communication groove are provided on its wall to install the magnetic circuit system.

[0031] The magnetic circuit system is a double magnetic circuit structure capable of providing greater magnetic force, including a first inner magnetically conductive plate 311 , an inner magnet 321 , a first outer magnetically conductive plate 312 , an outer magnet 322 and a ...

no. 2 example

[0039] The following will refer to Figure 5 The specific structure of the micro dynamic electro-acoustic transducer according to the second embodiment of the present invention will be described.

[0040] Figure 5 It is a sectional view showing the internal structure of the micro dynamic electro-acoustic transducer according to the second embodiment of the present invention. Such as Figure 5 As shown, the difference between this embodiment and the first embodiment is that, in this embodiment, the magnetic circuit system is an external magnetic circuit structure. In the outer magnetic circuit structure, the second magnetic conductive plate 33' integrally forms a protrusion in its center, replacing the first inner magnetic conductive plate 311 and the inner magnet 321 in the first embodiment, constituting the outer magnetic circuit The inner protrusion in the structure, and the first magnetic conducting plate 31 and the magnet 32, which are symmetrically arranged around the...

no. 3 example

[0045] The following will refer to Figure 6 The specific structure of the micro dynamic electro-acoustic transducer according to the third embodiment of the present invention will be described.

[0046] Figure 6 It is a sectional view showing the internal structure of the micro dynamic electro-acoustic transducer according to the third embodiment of the present invention. Such as Figure 6 As shown, the difference between this embodiment and the first embodiment is that, in this embodiment, the magnetic circuit system is an internal magnetic circuit structure. In the inner magnetic circuit structure, the edge of the second magnetic conductive plate 33 ″ is bent upward to form a side wall, which replaces the first outer magnetic conductive plate 312 and the outer magnet 322 in the first embodiment, The outer protrusions in the inner magnetic circuit structure are formed, and the first magnetic conductive plate 31 and the magnet 32, which are combined together from top to b...

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Abstract

The invention relates to a micro moving-coil type electro-acoustic converter. The micro moving-coil type electro-acoustic converter comprises a shell, and a magnetic circuit system and a vibration system which are arranged in the shell; the magnetic circuit system comprises a first magnetic board, magnetic bodies and a second magnetic board which are arranged in the shell and form an annular outer protrusion and inner protrusions which are positioned at inner sides of the outer protrusion at specified intervals; a magnetic gap is formed between the outer protrusion and the inner protrusions; and the vibration system comprises a vibrating diaphragm and a driving piece which is combined with the vibrating diaphragm together and is electrically connected with an external circuit, wherein the vibrating diaphragm comprises a center part, an edge part and a connection part which is integrally and closely connected with the center part and the edge part, and the center part of the vibrating diaphragm is fixed on the inner protrusions in the magnetic circuit system. According to the micro moving-coil type electro-acoustic converter provided by the invention, the height of the product can be lowered, and the vibrating diaphragm can be prevented from colliding with the magnetic circuit system, thus the micro moving-coil type electro-acoustic converter is beneficial to be designed in miniaturization.

Description

technical field [0001] The present invention relates to a miniature dynamic electro-acoustic transducer, in particular, relates to a miniature dynamic electroacoustic transducer which can reduce the height of the product and prevent the collision between the diaphragm and the magnetic circuit system, thereby facilitating the miniaturization design of the product. sound converter. Background technique [0002] With the development of consumer electronic products such as portable terminals, a large number of micro transducer devices, especially micro dynamic electroacoustic transducers, have been widely used. As we all know, the working principle of the miniature dynamic electroacoustic transducer is that the voice coil passing through the alternating current is stressed in the magnetic field, so that the vibration system of the miniature dynamic electroacoustic transducer vibrates in the vertical direction, thereby emitting sound . [0003] Currently, miniature dynamic elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R9/02H04R9/06
Inventor 江超杨健斌
Owner GOERTEK INC