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US 7,352,662 B2Granted
Molded coil device for actuator of disc drive
AssigneeSamsung Electronics Co., Ltd.
InventorsWon-Ik Cho, Byung-Ryul Ryoo, Jong-Ha Jun, Dae-Jong Jang, Hyung-Joo Kang, Byung-Youn Song
Life of this patent
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Abstract
A molded coil device includes a coil comprised of a plurality of turns of a conductive material through a plurality of planes and an integral body comprised of an insulating and nonmagnetic material burying the coil. The coil is first formed and thereafter is sintered/pressed with the insulating and nonmagnetic material to form the integral body. The molded coil device is advantageously applied within an optical pickup actuator of an optical disc drive.
Claims18
A molded coil device for an actuator, comprising:
- at least one coil comprised of a plurality of turns of a conductive material formed through a plurality of planes;
- an integral body comprised of an insulating and nonmagnetic material that buries the plurality of turns of the at least one coil;
- and
- a yoke buried within the integral body.
1 more element
An optical pickup actuator, comprising:
- a blade having an objective lens mounted thereon;
- a base having magnets disposed thereon, wherein the blade is movably coupled to the base;
- and
- a molded coil device installed on the blade for moving the blade by inducing an electromagnetic force from interaction with the magnets, the molded coil device comprising:
- a plurality of coils for driving the blade in at least a focus direction and a tracking direction, each of the plurality of coils having a respective plurality of turns of a conductive material;
- and
- an integral body comprised of an insulating and nonmagnetic material that buries the plurality of turns of the plurality of coils with all of the plurality of coils that drive the blade in at least the focus and tracking directions being buried in the one single integral body.
4 more elements
An optical pickup unit comprising:
- an optical module;
- an objective lens that forms light emitted from the optical module as at least one light spot on an optical disc;
- and
- an optical pickup actuator, comprising:
- a blade having the objective lens mounted thereon;
- a base having magnets disposed thereon, wherein the blade is movably coupled to the base, and wherein the base moves with respect to the optical disc for writing/reproducing information on/from various locations of the optical disc;
- and
- a molded coil device formed on the blade for moving the blade by inducing an electromagnetic force from interaction with the magnets, the molded coil device comprising:
- a plurality of coils for driving the blade in at least a focus direction and a tracking direction, each of the plurality of coils having a respective plurality of turns of a conductive material;
- and
- an integral body comprised of an insulating and nonmagnetic material that buries the plurality of turns of the plurality of coils with all of the plurality of coils that drive the blade in at least the focus and tracking directions being buried in the one single integral body.
8 more elements
An optical disc drive comprising:
- a spindle motor that rotates an optical disc;
- and
- an optical pickup unit including:
- an optical module;
- an objective lens that forms light emitted from the optical module as at least one light spot on the optical disc;
- and
- an optical pickup actuator, comprising:
- a blade having the objective lens mounted thereon;
- a base having magnets disposed thereon, wherein the blade is movably coupled to the base, and wherein the base moves with respect to the optical disc for writing/reproducing information on/from various locations of the optical disc;
- and
- a molded coil device formed on the blade for moving the blade by inducing an electromagnetic force from interaction with the magnets, the molded coil device comprising:
- a plurality of coils for driving the blade in at least a focus direction and a tracking direction, each of the plurality of coils having a respective plurality of turns of a conductive material;
- and
- an integral body comprised of an insulating and nonmagnetic material that buries the plurality of turns of the plurality of coils with all of the plurality of coils that drive the blade in at least the focus and tracking directions being buried in the one single integral body.
11 more elements
Dependencies are inferred from the claim text.