Abstract: A power line communications system includes slave apparatuses individually connected to multiple electric power line wirings; a master apparatus connected to one of the multiple electric power line wirings; and couplers each connected between the master apparatus and the others of the multiple electric power line wirings. The master apparatus includes a communicator for performing power line communications with the slave apparatuses via the electric power lines; a power supply terminal device connected to the one electric power line wiring; a communication connector provided between the communicator and the power supply terminal device; and a coupler connecting terminal device connected to each of the couplers via a signal line.

Abstract: The present invention provides a component molding method for increasing the strength of a resin component, such as a lens holder, used in manufacturing a lens drive unit, and also provides a resin component, and a component molding die. An initial flow direction of a resin injected from a gate 9G, from which a resin is injected into a cavity C, is set to extend substantially along a direction in which stiffness and strength of the resin component is needed to be higher than that in any other direction, by hitting the resin injected from the gate 9G against an inclined inner wall surface 33a of an inner wall of the cavity C to thereby change the flow direction almost 90° .

Abstract: An optical disc reproducing apparatus capable of preventing a contact between an objective lens and an optical disc disposed very close to each other to eliminate the damage-caused functional failures of the objective lens and the optical disc, and permitting proper focus control and tracking control to ensure high-reliability data recording/reading. A lens protecting part (116) protruding in an optical disc direction is provided on the surface facing the optical disc of the objective lens (103), and at least one recess (116a) for establishing communication between the inner and outer sides of the ring is formed in the lens protecting part (116).

Abstract: An optical pickup apparatus is characterized in that the optical pickup comprises a light emission part 60 for emitting first and second laser beams having different wavelengths from each other, a grating 62 for generating a pair of sub-beams from the laser beam emitted from the light emission part, and a hologram 63 for generating plus and minus high-order beams from the laser beam reflected by a recording medium to guide the high-order beams to a light receiving part, and the light receiving part comprises a pair of three-division light receiving elements for receiving the plus and minus high-order beam generated from the first or second laser beam reflected by the recording medium, respectively, to generate a focus error signal by a beam size method and two pairs of sub-beam light receiving elements provided by one pair with respect to each of a pair of the three-division light receiving elements, the two pairs of sub-beam light receiving elements for receiving the high-order beams generated from the sub-b

Abstract: An optical pickup is provided which can read information from a plurality of recording mediums having different wavelengths without the need for a mixing prism. The optical pickup is comprised of a light emission part, a grating, a hologram and a light receiving part. The light emission part emits first and second laser beams having different wavelengths from each other. The grating generates a pair of sub-beams from the laser beam emitted from the light emission part. The hologram generates first and second high-order beams from the laser beam reflected by a recording medium to guide the high-order beams to the light receiving part. The light receiving part receives the first and second high-order beams generates a focus error signal and a tracking error signal which enables the information to be correctly read from the different recording mediums.

Abstract: At the time of insert molding of suspension bases (500), areas of junction parts of the suspension bases (500) and flat plates (560) which are directly affected by fluidized synthetic resin when the synthetic resin is injected are varied independently so as to correct strain of suspensions (550).

Abstract: There is an optical pickup apparatus 200 using a semiconductor laser element 50 having a first light emission part 36 and a second light emission part 40, wherein it is constructed so that in case that the first light emission part 36 is placed in a position in which an image height does not occur and the second light emission part 40 is placed in a position in which an image height occurs, when the first light emission part 36 is driven, the same focus driving currents are supplied from a focus driving part 120 and when the second light emission part 40 is driven, an objective lens 54b is driven in a focus direction with the objective lens inclined by generating an offset value having a predetermined value from an offset generation part 126 and varying one of the focus driving currents of the focus driving part 120.

Abstract: An actuator includes an intervention member being interposed between an object lens and a bobbin for supporting the object lens and different from the bobbin in thermal conductivity, thereby preventing an occurrence of degradation of the lens characteristic of the object lens caused by unevenness of the temperature distribution in the object lens due to the heat generated by a coil.

Abstract: An optical pickup apparatus includes an object lens opposed to a disk, a fixing section, and a bobbin suspended by the fixing section and four or more longitudinal elastic members for supporting the object lens. A plurality of coil pairs symmetric with respect to a point (180 degrees), the centroid of the object lens placement face of the bobbin exist and are placed in a different surface.

Abstract: In a pickup device 1, a rising mirror 11 is composed in such a manner that two mirrors (first and second mirrors) are respectively provided on both sides of a substantially parallel transparent substrate 11A. A dichroic mirror 11B (first mirror) formed on one face (surface) reflects a blue laser beam and transmits a red laser beam. A hologram mirror 11C (second mirror) provided on the other face (reverse face) reflects a red laser beam.

Abstract: An optical pickup apparatus is characterized in that the optical pickup apparatus comprises a light emission part 60 for emitting first and second laser beams having different wavelengths from each other, a grating 62 for generating a pair of sub-beams from the laser beam emitted from the light emission part, and a hologram 63 for generating plus and minus high-order beams from the laser beam reflected by a recording medium to guide the high-order beams to a light receiving part, and the light receiving part comprises a pair of three-division light receiving elements for receiving the plus and minus high-order beam generated from the first or second laser beam reflected by the recording medium, respectively, to generate a focus error signal by a beam size method and two pairs of sub-beam light receiving elements provided by one pair with respect to each of a pair of the three-division light receiving elements, the two pairs of sub-beam light receiving elements for receiving the high-order beams generated from

Abstract: There is an optical pickup apparatus 200 using a semiconductor laser element 50 having a first light emission part 36 and a second light emission part 40, wherein it is constructed so that in case that the first light emission part 36 is placed in a position in which an image height does not occur and the second light emission part 40 is placed in a position in which an image height occurs, when the first light emission part 36 is driven, the same focus driving currents are supplied from a focus driving part 120 and when the second light emission part 40 is driven, an objective lens 54b is driven in a focus direction with the objective lens inclined by generating an offset value having a predetermined value from an offset generation part 126 and varying one of the focus driving currents of the focus driving part 120.

Abstract: A cartridge of write and read type or a cartridge of read only type is selectively loaded to a recording and reproducing apparatus. The recording and reproducing apparatus is provided with: a magnetic head for applying a magnetic field; a head movement device for moving the magnetic head between a near position and a far position; a switching lever, which is movable between a non-regulating position to allow the magnetic head to move between the near position and the far position, and a regulating position to regulate the position of the magnetic head at the far position; and a slide plate disposed movably on a cartridge holder and having a protruded portion which is opposed to the cartridge stored in the cartridge holder. The protruded portion abuts to the loaded cartridge to move the slide plate, and the switching lever is positioned at the non-regulating position by abutting to the moved slide plate if the loaded cartridge is the write and read type.