Swing-arm device for an optical scanning unit

专利名称：Swing-arm device for an optical scanning unit发明人：Johannes T. A. van de Veerdonk申请号：US06/321848申请日：19811116公开号：US04403316A公开日：19830906

摘要：A swing-arm device (5) for an optical disk player comprises a swing arm (16),which near one end (17) carries an optical scanning unit (6) and which is

electromagnetically pivoted by means of coils (27, 28) and a permanent magnetic stator(29, 30, 49-52, ) arranged on the swing arm. The center of mass (Z) of the pivotalassembly, inter alia comprising the swing arm and the optical scanning unit, is disposed onthe pivotal axis and the two coils are disposed diametrically on both sides of the pivotalaxis and exert equal pivotal forces which act in one plane which is perpendicular to thepivotal axis and which extends through the center of mass. The center of mass is disposedmidway between two ball-bearings (20, 21).

申请人：U.S. PHILIPS CORPORATION

代理人：Thomas A. Briody,Robert T. Mayer,Algy Tamoshunas

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