Abstract: An attachment portion 20 for a laser diode 1 is formed on a frame 2 of an optical pickup device. The attachment portion 20 includes a pair of inner peripheral faces 233 and 234 to which an outer peripheral face 103 of a circular stem 101 of the laser diode 1 can be press-fitted, and a pair of convex faces 241 and 242 rockably supporting an annular end face 104 of the stem 101 around a rocking center line L1. When the laser diode 1 is press-fitted and is then rocked around the rocking center line L1, the intensity distribution center of a laser beam 11 emitted from the laser diode 1 can be coincident with an optical axis L of an optical system.

Abstract: A gear meshing with a pinion controls the angle of rotation of a valve element which is brought into sliding contact with a valve seat, thereby controlling the opening and closing of a communicating hole of outflow pipe. During welding the valve seat plate and a housing, a hook portion of an upper portion of the gear is retained by a retaining portion to cause the valve element to be spaced apart from the valve seat. After natural cooling, the pinion is remotely operated by an electric motor to rotate the gear, thereby canceling the holding. A resilient arm causes the gear to be disengaged from the retaining portion by its urging force, brings the valve element into pressure contact with the valve seat, and allows the opening/closing operation to function smoothly.

Abstract: An optical pick-up device (1) includes a laser diode (2) for recording which acts as a fixation side light source attached to an attachment portion (5) of a device frame (4) and has a great calorific value, and a laser diode (3) for reproduction which acts as an adjustment side light source held in a holder (6) fixed with an adhesive (7) in a clearance (46) provided on a side surface (45) of the device frame. Heat generated from the laser diode (2) for recording is radiated efficiently through the device frame (4), and heat generated from the laser diode (3) is also radiated efficiently through the holder (6) fixed with the adhesive (7) which is partially filled for the device frame (4) with the clearance (46) formed.

Abstract: In the invention, pairs of output transistors are provided. An actuator having an inductance is connected to nodes formed between the pairs of output transistors. A drive circuit for the actuator is arranged such that the actuator is driven by causing a drive current to flow into the inductance. The drive circuit has an overvoltage detection circuit for detecting whether or not a voltage appearing at the nodes of the output transistor pairs exceeds a supply voltage by a first predetermined level and whether or not the voltage becomes lower than a ground level by a second predetermined level. Output transistors connected to the nodes are activated by an output from the overvoltage detection circuit.

Abstract: A pair of thrust hydrodynamic bearing portions are made to communicate with each other to form fluid circulating passages for equalizing a pressure imbalance between both thrust hydrodynamic bearing portions.

Abstract: In a small-sized hydroelectric power generating apparatus in which a waterwheel 3 arranged in a fluid path and rotating with passage of a prescribed flow rate of fluid, a rotating body 4 coupled with the waterwheel and rotating therewith is used as a rotor portion arranged oppositely to a stator portion 6, and the rotor portion is rotated relatively to the stator portion 6 with passage of the fluid to generate electric power, the small-sized hydroelectric generation includes a continuous internal space formed when a first case 1 and a second case 5 are fit to each other, said first case having an inlet 12 and an outlet 13 of said fluid path and said second case having the internal space which communicates with said inlet and outlet and in which said rotating body is arranged and separating the internal space from the stator portion, wherein a concave portion 14 is provided at a fitting portion between said first case and said second case; an opposite wall 5a opposite to the inner wall of said concave portion

Abstract: A motor includes a cylindrical rotor having a magnet, a stator having a cylindrical inner peripheral surface opposing to an outer periphery of the rotor, an output shaft projecting from one axial end side of the stator, and a frame fixed to the one axial end side of the stator to pivotally support the output shaft at a distal end thereof. Holes having diameters identical to the inner diameter of the stator are formed in the frame for pivotally supporting the distal end of the output shaft and for fixing the stator. A positioning jig of a diameter slightly smaller than those of the holes are simultaneously inserted into a hole defining the inner peripheral surface of the stator and into the two holes in the frame, and the positioning jig are caused to abut against the inner peripheral surfaces of the holes to effect positioning.

Abstract: A motor board 44 of a capstan motor, which is made of a metallic material offering good heat dissipation is provided in a tape running apparatus 1 in such a way as to face a circuit board 6 thereof. A motor drive IC 43, into which drive circuits for driving and controlling a capstan motor 4, a drum motor 2 and a loading motor 3 is incorporated, are mounted on this motor board 44. The circuit board 6 and the motor board are connected to each other by an inter-board connector 7. Further, electrical connection between the circuit board 6 and each of the motors 2, 3, and 4 is established through the motor board 44.

Abstract: A magnetic card reader for causing a magnetic card to make a move relative to a magnetic head and reproducing data on the magnetic card by the magnetic head, said magnetic card reader includes an amplifier for amplifying a magnetic signal provided by the magnetic head, a peak detection section for detecting a peak point of amplifier output from the amplifier output, a data reproduction section for reproducing digital data based on the interval between the peak points, an anomaly detection section for detecting an anomaly of the peak point interval and an output value storage section for converting the amplifier output from analog form into digital form every predetermined time and storing the provided data.

Abstract: A cylindrical case provided with a chamber is coaxially attached to a rotary shaft of a motor. A plurality of balancers are movably provided within the chamber so as to cancel a rotation eccentricity of the motor. A viscous member such as high viscosity fluid is provided on at least one of the surfaces of the balancers and an inner face of the chamber.

Abstract: An optical pickup device includes a semiconductor laser for emitting forward and backward laser light from front and back emergent end faces thereof, focusing device for focusing the forward laser light emergent from the front emergent end face of said semiconductor laser onto an optical recording medium, a light-receiving element for signal reproduction for detecting return light from the optical recording medium, and a light-guiding system for guiding the return light to said light-receiving element for signal reproduction, said optical pickup device being provided with a light source unit having an arrangement in which said semiconductor laser and said light-receiving element for signal reproduction being incorporated in a common package and shielding device, disposed inside said package of said light source unit, for preventing the light emitted from said semiconductor laser from being incident upon said light-receiving element for signal reproduction.

Abstract: A first pipe, a second pipe and a third pipe are airtighty connected with each other. A cam member rotates about a rotation axis for moving a valve body so as to open/close the first pipe and the second pipe so that the third pipe is selectively communicated with the first pipe and the second pipe, the cam member being movable in a direction parallel with the rotation axis. A cam actuator drives the cam member so as to move the cam member in the direction parallel with the rotation axis to open both of the first pipe and the second pipe, when the cam member is rotated at a predetermined angle.

Abstract: A connector is connected to a terminal of a coil wound on a motor bobbin in a motor, and coupled with a mating connector to electrically connect the motor and an external device. In the connector, at least one conductive connection member is accommodated in an insulative holder. The connection member includes a main body, a first engagement section monolithically formed on a first end portion of the main body to elastically hold the terminal of the coil, and a second engagement section monolithically formed on a second end portion of the main body to be coupled with the mating connector.

Abstract: In an optical pickup device, a first light source and a second light source, light emission points of which are not on an identical optical axis, are provided. A first laser light beam and a second laser light beam, wavelengths of which are different from each other, are respectively emitted from the first and second light sources. The first and second laser light-beams reflected from an optical recording medium are diffracted based on different diffraction order, such that the diffracted first and second laser light beams are received by a common light receiving element.

Abstract: The bearing apparatus used in the motor comprises a rotary shaft, a cylindrical-shaped radial bearing, and a thrust bearing for supporting the lower end portion of the rotary shaft. The rotary shaft is composed of a pipe made of stainless steel and a resin member for closing the lower end portion of the pipe. A groove for generation of dynamic pressure is not formed in the inner peripheral surface of the radial bearing or in the inner peripheral surface of the rotary shaft either. On the upper end portion of the rotary shaft, there is mounted a fan which, due to the rotation of the rotary shaft, takes in the air into the rotary shaft and, in the peripheral surface of the rotary shaft, there are formed blow-out holes for blowing out the air taken in by the fan from the outer peripheral surface of the rotary shaft.

Abstract: A manufacturing tool is inserted in a hole formed in a work piece for forming a fluid bearing groove on an inner peripheral surface of the hole. A tool shaft is rotated in the hole while being moved in an axial direction thereof. A plurality of balls are rotatably supported on an outer peripheral face of the tool shaft. The balls are to be abutted against the inner peripheral surface of the hole to form the fluid bearing groove thereon in accordance with the movement of the tool shaft. A retainer is detachably fitted on the outer peripheral face of the tool shaft so as to retain the balls on the tool shaft. A fixing member is detachably fitted with the tool shaft so as to fix the retainer on the tool shaft. The balls can be replaced when the fixing member and the retainer is detached from the tool shaft.

Abstract: A geared motor has a motor unit and a plurality of transmission gears for transmitting a driving force from the motor unit to the output shaft. Shaft supporting parts for supporting both ends of the shafts of the transmission gears are formed in the surfaces of a casing which covers the output shaft of the motor unit and the transmission gears. An insertion hole is formed passing through a coupling surface to which an output-side end surface of the motor unit is fastened. The transmission gears are a first bevel gear and a second bevel gear meshing with the bevel gear and having a shaft oriented in a direction orthogonal to the shaft of the bevel gear. One of the first and second bevel gears includes shaft support parts for supporting both ends of the bevel gear.

Abstract: An optical pickup device includes a semiconductor laser for emitting forward and backward laser light from front and back emergent end faces thereof, focusing device for focusing the forward laser light emergent from the front emergent end face of said semiconductor laser onto an optical recording medium, a light-receiving element for signal reproduction for detecting return light from the optical recording medium, and a light-guiding system for guiding the return light to said light-receiving element for signal reproduction, said optical pickup device being provided with a light source unit having an arrangement in which said semiconductor laser and said light-receiving element for signal reproduction being incorporated in a common package and shielding device, disposed inside said package of said light source unit, for preventing the light emitted from said semiconductor laser from being incident upon said light-receiving element for signal reproduction.

Abstract: A returning light beam from an optical disc is divided by a separating diffractor in the directions perpendicular to a track direction of the optical recording medium, and according to respective illuminances of the divided light beams, a deviation amount of an objective lens to an optical axis is detected. By feedback-controlling an objective lens driver by using the information of the detected deviation amount, the objective lens can be made to become stationary at the desired position in a short time. Accordingly, a time period required for the oscillation attenuation of the objective lens can be shortened, thereby, a time period for the reproduction can be shortened.

Abstract: In an optical head device for recording/reproducing information on/from an optical recording medium, a first laser light source emits a first laser light beam having a first wavelength, and a second laser light source emits a second laser light beam having a second wavelength which is different from the first wavelength. An common optical system includes a collimate lens and an objective lens. An optical path composition element directs the first laser light beam and the second laser light beam to the common optical system. A light separating element is disposed between the first laser light source and the optical path composition element, to reflect the first laser light beam toward the optical path composition element, and to pass a light reflected from the optical recording medium to the light receiving element. A relay lens having a positive power is disposed between the second laser light source and the optical path composition element.