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Voice coil motor

A voice coil motor and coil technology, applied in the field of voice coil motors, can solve problems such as poor adhesion of magnets, poor magnetism of voice coil motors, complex structure of voice coil motors, etc., and achieve the effect of simple structure and good magnetic properties

Inactive Publication Date: 2009-10-07
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the magnets of the conventional voice coil motor are adhered to the fixing frame, so that the structure of the voice coil motor is more complicated. At the same time, as the use time increases, the adhesion of the magnet becomes worse, so that the magnetic properties of the voice coil motor become weaker. poor

Method used

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Embodiment Construction

[0011] see figure 1 , which is the voice coil motor 10 provided by the embodiment of the present invention, and the voice coil motor 10 can be used by a lens module (not shown). The voice coil motor 10 includes: a casing 20 , a fixed casing 30 , a movable assembly 40 , two elastic pieces 50 and a carrier 60 .

[0012] The housing 20 is used to eliminate external electromagnetic interference to the voice coil motor 10 and prevent the electromagnetic interference of the voice coil motor 10 from affecting the operation of its external electronic components. The housing 20 can be made of magnetic shielding materials such as nickel-iron alloy, conductive plastic, surface conductive material, and conductive glass. The housing 20 has a bottom plate 22 , two first side plates 24 disposed on opposite sides of the bottom plate 22 , and two second side plates 26 disposed on opposite sides of the bottom plate 22 . The base plate 22 , the two first side plates 24 and the two second side ...

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Abstract

The invention relates to a voice coil motor, which comprises a fixed filling tube opening at two ends, a mobile filling tube contained in the fixed filling tube and two spring plates which are arranged at the opening positions at the two ends of the fixed filling tube; a coil is wound around the outer wall of the mobile filling tube, the spring plates are respectively provided with a connecting piece inside and an outside fixing piece outside, the spring plates are fixedly connected with one end of the mobile filling tube fixedly through the connecting parts thereof and connected with one end of the fixed filling tube fixedly through the outside fixing parts thereof, the fixed filling tube is made of permanent magnetic materials and used for generating magnetic fields so as to lead the electrified coils to be acted on by forces in the magnetic fields, thus driving the mobile filling tube to move along the central axis thereof. The voice coil motor has simpler structure and better magnetism.

Description

technical field [0001] The invention relates to a voice coil motor, in particular to a voice coil motor with a simpler structure and better magnetism. Background technique [0002] The voice coil motor has the advantages of small size, low power consumption and low price, and is suitable as an actuator in electronic products (such as digital cameras, mobile phones, digital video cameras, etc.) (see Design of a voice coil motor used in the focusing system of a digital video camera, Magnetics, IEEE Transactions on Volume 41, Issue 10, Oct. 2005 Page(s): 3979-3981). [0003] A common voice coil motor mainly includes a fixed frame, four magnets installed on the fixed frame, a movable barrel movably installed in the fixed frame, and a coil wound on the outer wall of the movable barrel. The movable barrel is used to install components such as lens barrels or zoom lenses in the lens module. When energized, the coil is subjected to force in the magnetic field generated by the magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K33/18H02K1/27H02K1/02G02B7/04G02B7/09
CPCH02K41/0356G02B7/08
Inventor 周代栩廖家宏
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD