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LENS HOLDER DRIVING APPARATUS

  • US 20150160471A1
  • Filed: 04/11/2014
  • Published: 06/11/2015
  • Est. Priority Date: 12/06/2013
  • Status: Active Grant
First Claim
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1. An lens holder driving apparatus, comprising:

  • an auto-focusing lens holder driving portion defining a lens holder having of a substantial octagonal tube along an optical axis, a ring-shaped focusing coil entwining the lens holder, a positioning magnet, a magnet holder for holding a magnet group disposed opposite to the focusing at the outside of the focusing coil, a first and second springs respectively mounted on lower and upper ends of the magnet holder for supporting the lens holder;

    a fixed portion defining a ring-shaped base having four sidewalls, a FPC mounted with the sidewall of the base for electrically connecting the first spring and a Hall element;

    the lens holder defining an outer tubular portion having a circular tubular shape, an octagonal ring-shaped end portion extending vertically from a lower end of the outer tubular portion, and a positioning portion provided at the four corners of the octagonal ring-shaped end portion for supporting the outer tubular portion for restricting the positioning magnet in proper position;

    the magnet holder defining a lower bracket disposed on the base, a upper base supporting by the lower bracket corporately forming a chamber accommodating the lens holder, the focusing coil and the positioning magnet therein, the lower bracket defining a sidewall and four pillars projecting at the four corners of the sidewalls and a receiving space formed between two adjacent pillars for receiving the magnet group, a first notch arranged on the pillar face to the focusing coil;

    the FPC defining a first segment mounted on the sidewall of the base, a second segment extending from the first segment and a third segment extending vertically from the second segment along a direction parallel to the optical axis into the first notch of the lower bracket;

    the Hall element mounted on the third segment of the FPC face to the positioning magnet over the focusing coil for detecting the position of the positioning magnet so as to adjust the position of the lens holder.

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