Objective lens holder for an objective lens driving device capable of thinning an optical pickup unit

摘要

An objective lens holder for use in an objective lens driving device of a symmetry type has an upper member and a lower member assembled with the lower member. The lower member has a pair of main bobbin portions for winding two tilting coils and two focusing coils. The pair of main bobbin portion is symmetrically disposed with respect to an optical axis of a laser beam. The upper member and the lower member have openings for passing through the laser beam. Each of the upper member and the lower member has four hook portions for winding four tracking coils.