| 摘要 |
PURPOSE:To prevent a higher order resonance of a focus spring, and a buckling phenomenon of a track spring by forming a titled optical pickup by the focus spring whose one end is fixed to an objective lens holder, a spring holder provided with a shaft for holding the other end of the focus spring and rotating and deflecting an objective lens, and a bearing holder. CONSTITUTION:When a current flows to a focus coil 13, a driving force is generated in the upper and lower directions by a magnetic flux generated by magnetic circuits 21, 22. A focus spring 15 is constituted of two pairs of upper and lower parallel plate springs, therefore, an objective lens 11 can be vibrated by coinciding roughly with an optical axis generated from an optical system. When a current flows to a track coil 14, a driving force is generated in the track direction by a magnetic flux generated by the magnetic circuits 21, 22. The driving force is transferred to an objective lens holder 12, it is brought to a rotary reciprocating movement centering around a shaft 17, this rotary reciprocating movement is controlled by a track spring 23 fixed to one end of a spring holder 16, and also a damper effect for driving a track is generated by a film-shaped rubber 24 and a space 26. |
