Abstract: A switching power-supply module includes circuit boards, power conversion circuit sections provided on the respective circuit boards, conductor land patterns provided with spacing therebetween along edges of the circuit boards, conductor terminals for interconnecting the conductor land patterns. The circuit boards are stacked with spacing therebetween with the corresponding conductor land patterns being aligned, and the aligned conductor land patterns are interconnected by the corresponding conductor terminals. At least one of the conductor terminals includes an interboard-connection portion for interconnecting the conductor land patterns of the circuit boards and a leg portion that extends from the interboard-connection portion in the stacking direction of the circuit boards and that defines an external-connection portion, and the other conductor terminals each function as an interboard-connection dedicated terminal for providing connection between the circuit boards.

Abstract: A switching power-supply module includes circuit boards, power conversion circuit sections provided on the respective circuit boards, conductor land patterns provided with spacing therebetween along edges of the circuit boards, conductor terminals for interconnecting the conductor land patterns. The circuit boards are stacked with spacing therebetween with the corresponding conductor land patterns being aligned, and the aligned conductor land patterns are interconnected by the corresponding conductor terminals. At least one of the conductor terminals includes an interboard-connection portion for interconnecting the conductor land patterns of the circuit boards and a leg portion that extends from the interboard-connection portion in the stacking direction of the circuit boards and that defines an external-connection portion, and the other conductor terminals each function as an interboard-connection dedicated terminal for providing connection between the circuit boards.

Abstract: The present invention relates to an optical data recording/reproducing device wherein an optical system holding portion holding a movable optical system having a carriage and a seek unit, and an emitting/detecting system holding portion holding an emitting/detecting system having an optical pickup unit are formed on the same housing. A number of components are reduced, a strength of the holding portions is improved, and an optical axis of each of systems is regulated with referring to the same housing. Therefore, an accurate assembling can be realized.

Abstract: An optical disk drive unit has an objective lens for converging light emitted from a light source and irradiating the converged light to an optical information recording medium; an objective lens holder for holding the objective lens; a carriage for supporting elastically the objective lens holder thereto; and a magnetic circuit for performing a seeking operation and having a magnet and a yoke arranged outside the carriage and extending along a radial direction of the optical information recording medium, the magnetic circuit having a movable coil fixed to the carriage so as to surround one side of the yoke. The movable coil is formed in a polygonal shape in cross section and is constructed such that one carriage side of the movable coil is located below a moving part of the objective lens and another side of the movable coil opposite to the one carriage side thereof is set to be longer than the one carriage side.

Abstract: An optical pickup apparatus includes a device for recording and reproducing information by changing a laser beam emitted from a semiconductor laser to a parallel light and by irradiating the parallel light to an optical information recording medium sequentially through a deflecting prism and an objective lens, a device for performing focusing and tracking servo controls by guiding a reflected light from the optical information recording medium to a servo optical system sequentially through the objective lens and the deflecting prism again, and a device for setting the positions of the deflecting prism and the objective lens such that the length of an optical path from a deflecting point of the deflecting prism to a main point of the objective lens is ranged from the focal distance of the objective lens to a length twice the focal distance of the objective lens.

Abstract: An optical information read/write apparatus that comprises a casing for installing an optical disk therein and a first movable unit having an objective lens for converging an optical beam on the disk. The lens center moves on a radial direction line originated from the disk center. A first fixed unit is disposed aside the disk in the casing. The fixed unit has an optical source for emitting the beam and constitutes a reading optical pickup in conjunction with the first movable unit. A second movable unit is disposed in the same half side of the disk as the first movable unit. The second movable unit has an objective lens for converging an optical beam on the disk. The lens center of the second unit moves on a radial direction line originated from the disk center. A second fixed unit is disposed aside the disk. The second fixed unit has an optical source for emitting the beam of the second movable unit and constitutes a writing optical pickup in conjunction with the second movable unit.

Abstract: An optical pickup device for recording, reproducing or erasing an information, comprises a sole semiconductor laser beam source for emitting a luminous flux, a polarizer for receiving the luminous flux emitted from the sole semiconductor laser beam source and dividing the received luminous flux into a plurality of luminous fluxes, and a sole object lens for receiving a plurality of the divided luminous fluxes and converging each of a plurality of the received luminous fluxes on small spots on an optical information recording medium, respectively.

Abstract: An optical pickup device that comprises a laser source for emitting a laser beam, an objective lens for converging the laser beam to a surface of an optical information recording medium to write optical information thereon, an optical signal detection system for detecting light reflected from the medium surface to read the information written on the medium and a deflection member disposed between the laser source and the objective lens for deflecting the laser beam to the lens. The deflection member has a deflection point where the laser beam is reflected toward the objective lens. The deflection member is arranged universally rotatable about the deflection point.

Abstract: An optical pickup device for an optical disk having a recording surface comprises a stationary optical system having an incident optical axis, which is parallel to a radial direction of the optical disk. The stationary optical system is adapted to transmit a light beam emitted from a light source along the incident optical axis. A carriage is provided for linear movement in a seeking direction along the incident optical axis of the stationary optical system. A deflecting member is secured to the carriage and has a deflecting face for receiving the light beam transmitted from the stationary optical system along the incident optical axis and for deflecting the same toward the recording surface of the optical disk.