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US 2016/0019925 A1Published application
Optical pickup device
AssigneeAlpine Electronics, Inc.
InventorsMitsunori Wada, Katsunari Ashimine, Yasunobu Inaba
Life of this patent
Estimating the term…
Abstract
An optical pickup device is one in which a lens holder is held by a movable base by using a resilient wire. A restricting abutting portion is formed at a lower portion of the lens holder. When the lens holder moves excessively downward, the restricting abutting portion comes into contact with a stopper portion to restrict a downward movement of the lens holder, so that it is possible to prevent the lens holder from contacting a unit chassis. When the unit chassis is not mounted on the movable base, it is possible to prevent excessive flexing of the resilient wire caused when an opposing abutting portion of the lens holder comes into contact with the unit chassis.
Claims16
An optical pickup device comprising:
- a movable base;
- and
- a lens driving unit that is supported by the movable base,
- wherein the lens driving unit includes a unit chassis, a lens holder, a resilient supporting member, and a focus correcting mechanism, the lens holder, the resilient supporting member, and the focus correcting mechanism being provided at the unit chassis, the lens holder holding an objective lens that opposes a recording medium, the resilient supporting member supporting the lens holder, the focus correcting mechanism moving the lens holder in a direction of an optical axis of the objective lens,
- wherein the lens holder includes a restricting abutting portion and an opposing abutting portion,
- wherein, when the lens holder moves in a direction away from the recording medium, the restricting abutting portion comes into contact with the movable base to restrict further movement of the lens holder, and
- wherein, when the lens holder moves in the direction away from the recording medium, the opposing abutting portion moves closer to the unit chassis, and, when the restricting abutting portion comes into contact with the movable base, the opposing abutting portion opposes the unit chassis with a gap between the opposing abutting portion and the unit chassis.
4 more elements
An optical pickup device comprising:
- a movable base;
- and
- a lens driving unit that is supported by the movable base,
- wherein the lens driving unit includes a unit chassis, a lens holder, a plurality of resilient supporting members, and a focus correcting mechanism, the lens holder, the resilient supporting members, and the focus correcting mechanism being provided at the unit chassis, the lens holder holding an objective lens that opposes a recording medium, the resilient supporting members supporting the lens holder, the focus correcting mechanism moving the lens holder in a direction of an optical axis of the objective lens,
- wherein the lens holder includes a restricting abutting portion and an opposing abutting portion,
- wherein, when the lens holder moves in a direction away from the recording medium, the restricting abutting portion comes into contact with the movable base to restrict further movement of the lens holder, and
- wherein, when the lens holder moves in the direction away from the recording medium, the opposing abutting portion moves closer to the unit chassis, and, when the restricting abutting portion comes into contact with the movable base, the opposing abutting portion opposes the unit chassis with a gap between the opposing abutting portion and the unit chassis.
4 more elements
An optical pickup device comprising:
- a movable base;
- and
- a lens driving unit that is supported by the movable base,
- wherein the lens driving unit includes a unit chassis, a lens holder, a resilient supporting member, and a focus correcting mechanism, the lens holder, the resilient supporting member, and the focus correcting mechanism being provided at the unit chassis, the lens holder holding an objective lens that opposes a recording medium, the resilient supporting member supporting the lens holder, the focus correcting mechanism moving the lens holder in a direction of an optical axis of the objective lens,
- wherein a tilt adjusting mechanism is disposed between the movable base and the unit chassis, the tilt adjusting mechanism adjusting an amount of tilt of the optical axis of the objective lens,
- wherein the lens holder includes a restricting abutting portion and an opposing abutting portion,
- wherein, when the lens holder moves in a direction away from the recording medium, the restricting abutting portion comes into contact with the movable base to restrict further movement of the lens holder,
- wherein, when the lens holder moves in the direction away from the recording medium, the opposing abutting portion moves closer to the unit chassis, and, when the restricting abutting portion comes into contact with the movable base, the opposing abutting portion opposes the unit chassis with a gap between the opposing abutting portion and the unit chassis, and
- wherein a positional relationship between the opposing abutting portion and the unit chassis is determined such that, when the opposing abutting portion and the unit chassis come into contact with each other in a state in which the lens driving unit is not mounted on the movable base, an amount of deformation of the resilient supporting member is within a resilience region of the resilient supporting member.
6 more elements
Dependencies are inferred from the claim text.