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Voice coil motor

A technology of voice coil motor and coil base, which is applied in the direction of driving/moving recording heads, electrical components, electromechanical devices, etc., to achieve the effect of improving assembly accuracy

Inactive Publication Date: 2008-07-09
SUNONWEALTH ELECTRIC MACHINE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is unavoidable to use precision jigs (not shown) to accurately paste the magnetic block 12 at the center of the bottom of the chamber 11, or to coaxially bond the magnetic block 12 and the permanent magnet 13. There is a problem with combining tolerances

Method used

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  • Voice coil motor
  • Voice coil motor
  • Voice coil motor

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Experimental program
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Embodiment Construction

[0026] Refer to figure 2 As shown, the voice coil motor of the first embodiment of the present invention includes a base 2, a magnetic induction group 3 and a coil base 4. The voice coil motor can be optionally used in various storage devices, such as a read head (not shown) in a precision micro-pitch mobile hard disk drive or an optical disk drive.

[0027] Refer to figure 2 As shown, the base 2 of the first embodiment of the present invention is generally in the shape of a "convex" cylinder. The base 2 is provided with a chamber 20, a positioning shaft hole 21 and a plurality of assembly holes 22. The chamber 20 is a cylindrical tube. The positioning shaft hole 21 is opened at the center of the bottom of the chamber 20. The assembling hole 22 is used to assemble the base 2 in a proper position, for example, in a proper storage device (not shown).

[0028] Refer again figure 2 As shown, the magnetic sensing group 3 of the first embodiment of the present invention includes a pe...

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Abstract

A structure of voice coil motor consists of base with a chamber and a positioning axis hole at center of chamber base, magnetic induction set with its bottom substance corresponding to positioning axis hole and fixing on it quickly for being, set on central position of chamber, coil seat being sheathed by a coil and being set in chamber as well as being sheathed above magnetic induction set for generating magnetic induction by connecting current through with coil so as to generate movement of coil seat to magnetic induction set relatively.

Description

Technical field [0001] The present invention relates to a voice coil motor, and more particularly to a voice coil motor with a positioning shaft hole formed in a base for quickly and accurately combining a magnetic sensing group. Background technique [0002] Refer to figure 1 As shown, a conventional voice coil motor (VCM) includes a base 10, a chamber 11, a magnetic conductive block 12, a permanent magnet 13, a coil base 14 and a coil 15. The base 10 is recessed to form the chamber 11. The magnetic conductive block 12 and the permanent magnet 13 are coaxially fixed in the chamber 11. The coil base 14 can be used for winding the coil 15, and the coil base 14 is placed in the containing chamber 11 without contact, so that the permanent magnet 13 is located in the inner space of the coil 15. [0003] When the coil 15 conducts a current, the coil 15 will generate magnetic induction with the permanent magnet 13, thus forming a driving force proportional to the current. The driving ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B21/02H02K33/18
Inventor 洪银树陈国祥
Owner SUNONWEALTH ELECTRIC MACHINE IND