发明名称 LENS HOLDER FOR OPTICAL PICKUP
摘要 PROBLEM TO BE SOLVED: To hold rectangularity between a lens bearing and a support shaft, and to easily hold mutual parallelity even in plural lens fitting holes by providing the lens fitting hole provided with a lens receiver and providing three projection parts on the lens receiving part. SOLUTION: This lens holder 1 is provided with the bearing 2 and the lens fitting holes 4a, 4b provided with the lens receiver 3, and the lens receiver 3 is formed on an upper part plane of a hollow disk concentrically provided on the inner peripheral surface of the lens fitting holes 4a, 4b. Further, three projection parts 5 are arranged on the circumference of the lens fitting hole or the lens receiver at a uniform angle of nearly 120 deg.. Then, the lens is fixed to a fixed surface. Thus, the lens is fixed horizontally by horizontally providing the height of three projection parts, and the parallelity of respective lenses are held even in plural lenses.
申请公布号 JPH11312333(A) 申请公布日期 1999.11.09
申请号 JP19980314246 申请日期 1998.11.05
申请人 NTN CORP 发明人 HIROSE KAZUO;TONOMURA TOMOMI
分类号 G11B7/135 主分类号 G11B7/135
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