Abstract: Provided are apparatuses for grounding the objective lens driving unit of an optical pickup device. An optical pickup device includes an objective lens driving unit and a base that supports the objective lens driving unit, and wherein the objective lens driving unit includes a moving structure including an objective lens and a plurality of drive coils; a static structure comprising magnets corresponding to the plurality of drive coils, a yoke that supports the magnets, and a wire holder that has a plurality of wiring layers including a ground wiring layer; a plurality of suspension wires that connect the plurality of drive coils to the plurality of wiring layers; a supporting portion connected to the yoke and fixed to the wire holder; a projection extending from the supporting portion and disposed adjacent to the ground wiring layer; and conductive bonding material connects the ground wiring layer with the projection.

Abstract: Provided is an objective lens driving unit that prevents an electrical short circuit between very closely spaced second terminals in the objective lens driving unit. The objective lens driving unit is capable of being used in a slim-type optical disc drive.

Abstract: Provided is a lens driving unit for an optical pickup and an optical disc drive that employs the lens driving unit. The lens driving unit includes a lens frame in which an object lens and a plurality of driving coils are installed, and a plurality of suspension wires connected to the driving coils. The lens frame also includes a plurality of winding posts disposed on opposing sides of the lens frame and extending in a direction in which the suspension wires extend. According to various examples, coil ends of the driving coils are wound around the winding posts to electrically connect the driving coils to the suspension wires.

Abstract: An optical pickup device is provided, a cover of which covering a housing is prevented from deforming. A principal surface of an optical pickup device of the present invention is covered with a cover 13. The cover 13 includes: a cover portion 13G; a hole portion 13 provided at an end in the longitudinal direction and is screwed; an engagement portion 13A provided at the other end in the longitudinal direction and is engaged with the housing; and an engagement portion 13D engaged with the opening portion of the housing in the middle part. The engagement portion 13D placed in the middle part of the cover portion 13G is engaged with the housing to prevent the cover portion 13G from bulging outward.

Abstract: An optical disc drive device has a metallic exterior casing and an internal unit to be housed in the exterior casing. The internal unit further includes an optical pickup unit for performing recording or reproduction of information signals on an optical disc, and a printed wiring substrate on which a connector electrically connected to the optical pickup unit and serving for transmission and reception of electrical signals from and to external electronic equipment is mounted. The exterior casing has an opening for allowing the connector to be exposed outside, the printed wiring substrate has a ground pattern formed to surround the connector, and a fringe portion of the opening of the exterior casing and the ground pattern are in electrical contact with each other. Thus, radiation noise from around wiring lines contained in the optical disc drive device or the like is reduced.

Abstract: Provided is an objective lens driving unit that includes a moving structure including an objective lens and a driving coil, a yoke and a fixed portion extending from the yoke, and a wire holder that has a first surface and a second surface that is adjacent to the first surface. The fixed portion of the yoke is integrally bonded to the first surface, and a terminal unit comprising a plurality of interconnection layers is embedded on the second surface. The objective lens driving unit also includes a plurality of suspension wires that connect the driving coil to the terminal unit of the wire holder.

Abstract: An optical disc apparatus records information onto plural disc shaped mediums of different standards or reproduces information from the plural disc shaped mediums. The optical disc apparatus includes an optical pickup equipped with a spherical aberration correcting unit using a movable lens, and a disc insertion unit for inserting and ejecting the disc shaped mediums. The spherical aberration correcting unit starts the movement of the movable lens to an initial position while the disc insertion unit inserts or ejects the disc shaped medium. As such, the present invention discloses the optical disc apparatus with a reduced disc recognition time for improving user convenience and a driving method thereof.

Abstract: An optical disk apparatus is disclosed which includes a first printed circuit board, on which a first circuit pattern is formed; a rotor, on which an optical disk may be placed, and which is electrically connected with the first circuit pattern; a second printed circuit board, which is stacked adjacent to the rotor on a surface of the first printed circuit board, and on which a second circuit pattern is formed; a sensor unit, which is mounted on the second printed circuit board in electrical connection with the second circuit pattern, and which is configured to sense a rotation of the optical disk; and a support plate, which supports the first printed circuit board and the rotor. In this optical disk apparatus, a separate printed circuit board can be utilized to support the sensor unit, whereby manufacturing costs can be reduced and working efficiency can be improved.

Abstract: An optical disc record system comprising an optical pickup actuator unit for transferring data to and/or from a rotating optical disc. The optical pickup actuator unit comprises a fixed part (1) and a movable part (2) carrying an objective lens (4) for focusing a light beam on the optical disc. The movable part (2) is connected to the fixed part (1) by a number of substantially parallel elastic suspension wires (5). The movable part (2) is provided with a number of coils (8, 9, 15, 16, 17) of electrically conductive wires, which coils (8, 9, 15, 16, 17) are at least partly present in a magnetic field generated by magnets (10, 11, 18). At least one electrically conductive stranded wire (22, 23) is present between said fixed part (1) and said movable part (2) in order to feed electric current to at least one coil (16, 17).

Abstract: An optical disk apparatus according to the present invention includes an optical pickup device and a control section for controlling an operation of the optical pickup device. The optical pickup device includes a plurality of first wiring lines for transmitting signals from the control section, a second wiring line to be used for an adjustment of the optical pickup device, and a connector section which is electrically connected to the first wiring lines. The optical disk apparatus further includes a flexible printed wiring board (FPC) which is connected to the connector section for electrically connecting the first wiring lines to the control section. The FPC includes a plurality of third wiring line for electrically connecting the first wiring lines to the control section, such that a pitch of the plurality of third wiring lines in a central portion of the FPC is broader than a pitch of the plurality of third wiring lines in a region of the FPC adjoining the connector section.

Abstract: An optical pick-up actuator includes a lens holder having tracking and focusing coils which substantially extend in two parallel planes at a side of the lens holder. A magnet system cooperates with the tracking and focusing coils and is arranged separately from the lens holder and extends beyond the planes. The coils are arranged for effecting tilt through cooperation with the magnet system and may be provided at each of two opposite sides of the lens holder.

Abstract: An optical pickup for disc device has elastic wires 15 reliably connected with a dumping gel box 6. Guide members 18 are provided integrally with the dumping gel box 6 along bottom edges of side surface 6 as of the dumping gel box 6 while portions of the guide members 18 opposing to the grooves 11 are cut out to form air outlet holes 19 for the communication of the grooves 11 with outside atmosphere. The connection wiring 13 in the form of a printed circuit film or strip is folded to have a U-shape and attached to a back surface 6b and the both side surfaces 6a of the dumping gel box 6 and both end portions 13a of the connection wiring 13 are tentatively adhered to the both side surfaces 6a of the dumping gel box 6 by quick drying adhesive 20. Thermosetting adhesive 14 is filled in the grooves 11 and heated to be set and finally adhere the both end portions 13a of the connection wiring 13 to the both side surfaces 6a of the dumping gel box 6.

Abstract: An optical head device includes a lens holder, a wire support body which supports the lens holder through a plurality of wires, and a plate-like member on which the wire support body is mounted. The plate-like member includes a bottom plate part on which the wire support body is mounted and a rising part raised from the bottom plate part so as to face with a gap to a side face of the wire support body. The wire support body is subjected to surface bonding to the rising part with a first adhesive which is disposed within the gap and mounted on the plate-like member.

Abstract: In an optical disc apparatus, a metallic member forming an optical pickup, such as a bottom cover member of the optical pickup, has a protrusion in an integral form on the portion of the metallic member that is opposed to a plane of a flexible printed-wiring board, and the optical pickup is constructed so that when it comes into contact with an opposed face of the flexible printed-wiring board, the optical pickup brings a front end of the protrusion into contact with the opposed face.

Abstract: In order to improve reliability of an optical disk drive apparatus at low cost, a flexible substrate for making connection between an optical pick-up device incorporated in the optical disk drive apparatus and a drive side is divided into a first flexible substrate fixed to the optical pick-up body (for example, upper surface), and a second flexible substrate connected to the first flexible substrate and extending to the drive, wiring conductors formed on a connection end portion of the first flexible substrate and wiring conductors formed on a connection end portion of the second flexible substrate are superposed at a region adjacent an end of the case of the optical pick-up device body, and connected to each other by joining material, and a connection section between the wiring conductors is held down by a cover for protecting the optical pick-up device body.

Abstract: First, second, and third lead-out conductors connected to the electrodes of two types of laser emission devices of an optical pickup are led out on a lead-out board. First connection areas short-circuit by solder at a portion of opposing parts of any two adjacent lead-out conductors of the first, second, and third lead-out conductors in the width direction crossing the longitudinal direction and open the short circuit, and second connection areas short-circuit by solder at a portion of opposing parts of the other pair of two adjacent lead-out conductors of the first, second, and third lead-out conductors in the width direction crossing the longitudinal direction and open the short circuit. The first connection areas and the second connection areas are arranged in a staggered pattern in the longitudinal direction of the lead-out conductors.

Abstract: An optical pickup actuator and a method thereof includes a bobbin having a lens to scan a laser beam on a track of a disc, a winding coil moving the bobbin on the track in focusing and tracking directions, and an integrated circuit board used as the bobbin using a printed circuit board manufacturing technology and integrally formed with the winding coil in a monolithic body. The bobbin used with the optical pickup actuator includes the printed circuit board, a plurality of tracking circuit patterns formed on both surfaces of the PCB, a plurality of focusing circuit patterns formed on the both surfaces of the PCB, a plurality of via holes formed on the PCB to electrically connect the tracking circuit patterns and the focusing circuit patterns, an objective lens mounting unit formed on the PCB, and a connecting pad through which a power is supplied to the tracking and focusing circuit patterns.

Abstract: The actuator comprises of two magnetic elements, four metallic wires, a lens holder located between the two magnetic elements for holding a lens, and a planar coiling device affixed on the lens holder. The lens holder further comprises of at least one fixing part whose purpose is to connect with the four metallic wires and keep the lens holder at a hanging status. The planar coiling device further comprises of two focusing coils, two tracking coils and four separated bonding pads, two bonding pads located on each of the two surfaces of the planar coiling device for respectively connecting with the four metallic wires; two of the four bonding pads electrically connect to the two focusing coils and the other two bonding pads electrically connect to the two tracking coils.

Abstract: An optical pick-up device having cheap and simple structure capable of precisely positioning members assembled upon an actuator base makes use of respective flush screw members for a magnet holder and for a printed-circuit board eccentrically positioned between an actuator base and a magnet holder, together with between the printed-circuit board and the support member. The flush screw member is inserted through the holder hole, firmly secured into the screw hole, and thereby prevents the pick-up device from being loosened, because of being provided with a predetermined eccentric distance between center axles of the screw hole and the holder hole. Likewise, a triangle-shape opening of the printed-circuit board is adapted to receive the board flush screw, so that a slant tapered surface of a board flush head of the board flush screw acts as an eccentrically fastener for fixture and positioning of the support member and the printed-circuit board.

Abstract: An objective lens drive apparatus includes a stationary member, a movable portion having an objective lens, an objective-lens holding member, and driving coils, and a plurality of rod-like elastic support members each having an axial direction parallel to a third direction perpendicular to a first direction and a second direction, the support members elastically supporting the movable portion so that the movable portion is movable to the stationary member in the first direction and the second direction. The movable portion is supported by the support members on both sides of the movable portion in the third direction, the support members are arranged on different planes perpendicular to the first direction, and the movable portion is arranged to be movable in the third direction with the support members, so that the objective lens is rotatable around an axis of the second direction.

Abstract: An objective lens drive device (8) includes a supporting block (9), a movable block (10) for holding an objective lens (27), and supporting springs (22) for connecting the supporting block and the movable block. Elements of the supporting block of the objective lens drive device (8) are a stationary section (11), a supporting shaft (12), a tilt drive section (13), and tilt drive magnetic circuits (20 and 20). The stationary section (11) is secured to a movable base (7) that is movable in radial directions of a disc-shaped recording medium (100). An axial direction of the supporting shaft (12) is perpendicular to both focusing directions and tracking directions. The tilt drive section (13) is rotatably supported at the stationary section through the supporting shaft and is connected to the movable block through the supporting springs. The tilt drive magnetic circuits (20 and 20) are used to rotate the tilt drive section with respect to the stationary section.

Abstract: An optical disk drive includes an optical pick-up unit having a fixed part with at least a light source, and a movable part mounted on a guide. The movable part includes a mirror, a focusing lens, and lens-moving elements. The movable part is adapted to move a focused beam along the disk. A single PCB is provided having a signal connection to the lens-moving elements on the movable part of the pick-up unit though flexible wires. The PCB serves as a mounting base for the fixed part of the optical pick-up unit, the guide, and the drive motor.

Abstract: A lens actuator keeps an objective lens focused on a track in an information recording layer of an optical disc against fluctuation unavoidable for the optical disc, and has a lens holder, three electromagnetic actuators for moving and tilting the lens holder and three pairs of elastically deformable conductive connecting rods connected to both side surfaces of the lens holder for movably retaining the lens holder over a base plate; since two pairs of elastically deformable conductive connecting rods are symmetrically arranged on upper and lower sides of the remaining pair, the lens holder is smoothly tilted and moved in the radial direction of the optical disc without any tilt, whereby the lens actuator promptly and exactly cancels the fluctuation of the optical disc.

Abstract: Provided is an optical pickup actuator including a blade, a plurality of wires, coils, magnets, and connectors. The blade has an objective lens. The plurality of wires support the blade so that the blade moves around a predetermined holder. The coils are installed on the blade. The magnets interact with a current flowing through the coils to generate an electromagnetic force. The connectors electrically connect the wires and the coils so that a power supply supplies a current to the coils via the wires. The connectors include conductive plating terminals that are connected to the coils and installed on the body of the blade so that ends of the wires are connected to the connectors.

Abstract: Suspension wires (3a) and (3c) are fixed to and bridged over a lens holder (1) and a fixing member (11) which is fixed to the housing. On each of side surfaces of the lens holder (1) is mounted a tilt bobbin (8) onto which a tilt coil (9) is wound. A second suspension wire (3b) is fixed to and bridged over the tilt bobbin (8) and the fixing member (11).

Abstract: An optical pickup has a pair of left and right leg portions formed integrally at both side edge portions of a rear end portion of a resilient plate. The leg portions extend forwardly along a horizontal longitudinal direction. A pair of fixing holes are penetratingly provided in the respective leg portions on a transverse phantom line passing through a central portion of the resilient plate and extending in a horizontal transverse direction and at positions spaced apart an equal interval from a longitudinal phantom line passing through the central portion of the resilient plate and extending in the horizontal longitudinal direction. A pair of fixing screws are screwed into a pair of threaded holes in a mounting surface of a base through the fixing holes, thereby fixing the leg portions to the mounting surface.

Abstract: A pickup device employing an inexpensive flexible printed circuit sheet (FPC) which demonstrates preferable electrical characteristics. FPC has a signal conductive layer inside, and a U-shape bending portion is formed in a midway of FPC at a position where a hologram unit is connected. An opening is formed on FPC adjacent to an area when the hologram unit is connected, and the length of this opening is longer than the height of the hologram unit.

Abstract: An optical pickup has a support pedestal integrally formed at a rear end portion of a mounting surface of a base. A pair of left and right leg portions extend forwardly from both side edge portions of a rear end portion of a resilient plate. A fixing hole is penetratingly provided in each of the leg portions on a phantom line passing through a central axis of a photodiode and extending in a horizontal transverse direction. Each fixing screw is screwed into a threaded hole in the mounting surface through each fixing hole, so as to press the rear end portion of the resilient plate against the support pedestal.

Abstract: In an optical pickup system, at least two suspension wires support a lens holder on which an objective lens and driving coils are mounted. The suspension wires are respectively secured on opposite surfaces of the lens holder. The lens holder has connecting members, an end of each winding for the driving coils is wound around one of the connecting members, and a tip of each of the suspension wires comes into contact with the corresponding connecting member. The connecting members are positioned in such a manner as to be displaced apart from each other in the extending direction of the suspension wires.