OPTICAL PICKUP DEVICE

PURPOSE:To drive linearly an objective lens in response to a servo signal without generating mechanical resonance, etc., by using a thin elastic material like a rubber-like material formed approximately into a bevel or truncated cone shape to produce a bearing means of an objective lens holding member. CONSTITUTION:A support shaft 2 is set vertically at the center part of a discoid substrate 1, and an objective lens holding barrel 3 is attached coaxially to the shaft 2 via a bearing means 4 so that the barrel 3 can move and turn freely in the axial direction. An objective lens 5 is set above the barrel 3 and at a position having eccentricity from the axial center. The means 4 consists of a pair of upper and lower elastic materials 11 and 11 which are fitted to the shaft 2. These materials 11 are actuated with a fixed start torque so as to move up and down and turn angularly the barrel 3 smoothly and with no friction when servo signals are applied to coils 6 and 7. At the same time, the materials 11 also function to give the linear response characteristics to absorb undesired vibration due to mechanical resonance produced between the barrel 3 and various parts attached to the barrel 3.