Objective lens supporting apparatus and optical pickup
AssigneeFunai Electric Co., Ltd.
InventorTsutomu Matsui
Life of this patent
Estimating the term…
Abstract
An objective lens supporting apparatus of an optical pickup includes a lens frame in which an objective lens is mounted; receiving member for receiving driving forces for displacing the objective lens in the direction of the optical axis and in a direction perpendicular to the optical axis is disposed; a support base in which generating member for generating the driving forces is disposed; an elastic member W extended from the support base and fixed to the lens frame for swingably supporting the lens in a cantilevered manner; and a tilting member for inclining the optical axis of the objective lens with respect to the support base by tilting the lens frame.
Claims9
An objective lens supporting apparatus of an optical pickup for focusing and positioning a light beam spot onto a disk type medium being recorded information to be optically read, comprising:
- an objective lens;
- a lens frame on which the objective lens is attached, the lens frame having a receiving member which receives a driving forces for displacing the objective lens in a direction of an optical axis thereof and in a direction perpendicular to the optical axis;
- a support base;
- two pairs of upper and lower wire-like elastic members arranged left side and right side respectively, each wire-like elastic member being extended from the support base and fixed to the lens frame and adapted to support the lens frame in a cantilevered manner so as to permit the lens frame to swing;
- a pair of magnets disposed on the support base at a predetermined interval and opposed to each other so that the lens frame is interposed therebetween;
- and
- a coil part being interposed between the pair of magnets and fixed to the lens frame and adapted to tilt the lens frame by being energized so as to incline the optical axis of the objective lens with respect to the support base,
- wherein the left side and right side wire-like elastic members are disposed in such a way as to converge toward the lens frame, and
- wherein the coil part comprises a pair of coils attached to both side parts of the lens frame, which are respectively opposed to the pair of magnets, in such state where the pair of coils project downwardly from the lens frame and opposed to each other.
An objective lens supporting apparatus of an optical pickup for focusing and positioning a light beam spot onto a disk type medium being recorded information to be optically read, comprising:
- an objective lens;
- a lens frame on which the objective lens is attached, the lens frame having a receiving member which receives a driving forces for displacing the objective lens in a direction of an optical axis thereof and in a direction perpendicular to the optical axis;
- a support base;
- two pairs of upper and lower wire-like elastic members arranged left side and right side respectively, each wire-like elastic member being extended from the support base and fixed to the lens frame and adapted to support the lens frame in a cantilevered manner so as to permit the lens frame to swing;
- a pair of magnets disposed on the support base at a predetermined interval and opposed to each other so that the lens frame is interposed therebetween;
- and
- a coil part being interposed between the pair of magnets and fixed to the lens frame and adapted to tilt the lens frame by being energized so as to incline the optical axis of the objective lens with respect to the support base,
- wherein the left side and right side wire-like elastic members are disposed in such a way as to converge toward the lens frame, and
- wherein the coil part comprises a pair of coils attached to both side parts of the lens frame, which are respectively opposed to the pair of magnets, in such state where one of the pair of coils is attached to a bottom end portion of the side part and projects downwardly from the lens frame and the other of the pair of coils is attached to a top end portion of the side part and projects upwardly from the lens frame.
An objective lens supporting apparatus of an optical pickup for focusing and positioning a light beam spot onto a disk type medium being recorded information to be optically read, comprising:
- an objective lens;
- a lens frame on which the objective lens is attached, the lens frame having a receiving member which receives a driving forces for displacing the objective lens in a direction of an optical axis thereof and in a direction perpendicular to the optical axis;
- a support base;
- a support member being extended from the support base and fixed to the lens frame and adapted to support the lens frame in a cantilevered manner so as to permit the lens frame to swing;
- and
- a tilting member for inclining the optical axis of the objective lens with respect to the support base by tilting the lens frame.
An optical pickup having an objective lens supporting apparatus for focusing and positioning a light beam spot onto a disk type medium being recorded information to be optically read, wherein the objective lens supporting apparatus comprises:
- an objective lens;
- a lens frame on which the objective lens is attached, the lens frame having a receiving member which receives a driving forces for displacing the objective lens in a direction of an optical axis thereof and in a direction perpendicular to the optical axis;
- a support base;
- a support member being extended from the support base and fixed to the lens frame and adapted to support the lens frame in a cantilevered manner so as to permit the lens frame to swing;
- and
- a tilting member for inclining the optical axis of the objective lens with respect to the support base by tilting the lens frame.
Dependencies are inferred from the claim text.