Abstract: A MEMS mirror device includes a rectangular frame, a mirror unit having a reflecting portion on one face thereof and connected via the hinges inside the frame, and a drive unit for tilting the mirror unit around the hinges as the axis, wherein the frame has two protruding portions spaced at a regular interval and extending into the frame on both sides of a connected portion with the hinge, and an elastic member is provided to bridge the hinge between two protruding portions.

Abstract: In an optical pickup device provided with an optical system for guiding and focusing three-beam laser light along a predetermined route onto a recording surface of an optical disk and guiding a reflected light from the recording surface along the same route, a transparent plate, whereof a normal line is inclined by 45° with respect to an optical axis of the reflected light and is fixed in the direction in which the component of the normal line which is vertical to the optical axis is fixed to a direction of being rotated from a horizontal direction by 45° about the optical axis, is provided on the route of the reflected light between a beam splitter and an optical sensor.

Abstract: The optical head device for carrying recording/reproducing of data by irradiating a recording face of an optical disk with a laser beam, includes a base frame provided with an optical system for guiding the laser beam to the optical disk; and a sub-frame provided with a semiconductor laser for and fixed to the base frame. In this optical head device, a diamond-like carbon (DLC) film is formed on the mating faces of the base frame and the sub-frame, respectively.

Abstract: The optical head device includes a semiconductor laser for emitting a laser beam having an elliptical beam shape; a collimator lens for collimating the laser beam emitted from the semiconductor laser; a reflector including pair of belt-like pieces one of the surfaces of which is used as a reflecting face formed in a curved face having a curvature along their longitudinal direction, the pair of belt-like pieces being formed to be arranged in a major axis direction of an elliptical beam flux to sandwich the optical axis of the laser beam, and an optical sensor equipped with a condenser lens for detecting the strength of the beam reflected from the pair of belt-like pieces of the reflector.

Abstract: The apparatus has a lens supporting unit which supports one side of a lens holder holding one lens forming a part of an expander lens with a plurality of plate springs, a lens driving unit which apply a driving force to the lens holder utilizing an electromagnetic force, and a solenoid which allows a plunger to be abutted and spaced on and from a surface on one side of the lens holder, with an elastic member interposed therebetween, in a position in the middle of a plurality of connecting regions where the plate springs are respectively connected.

Abstract: In an optical pickup device provided with an optical system for guiding and focusing three-beam laser light along a predetermined route onto a recording surface of an optical disk and guiding a reflected light from the recording surface along the same route, a transparent plate, whereof a normal line is inclined by 45° with respect to an optical axis of the reflected light and is fixed in the direction in which the component of the normal line which is vertical to the optical axis is fixed to a direction of being rotated from a horizontal direction by 45° about the optical axis, is provided on the route of the reflected light between a beam splitter and an optical sensor.

Abstract: In an optical pickup apparatus which includes an objective lens which condenses laser light on a recording surface of an optical disk, and a lens holder which holds the objective lens and whose location can be changed, a detection coil for a proximity sensor is disposed on a top surface of the lens holder. The detection coil detects a distance to the recording surface of the optical disk which is made of a metallic material, and control is provided so that the objective lens will not contact the optical disk.

Abstract: A MEMS mirror device includes a rectangular frame, a mirror unit having a reflecting portion on one face thereof and connected via the hinges inside the frame, and a drive unit for tilting the mirror unit around the hinges as the axis, wherein the frame has two protruding portions spaced at a regular interval and extending into the frame on both sides of a connected portion with the hinge, and an elastic member is provided to bridge the hinge between two protruding portions.

Abstract: The optical pickup device includes a semiconductor laser for emitting laser light of 650 nm and 780 nm in wavelengths, a semiconductor laser for emitting laser light of 400 nm in wavelength, and an optical sensor which is provided in sequence with a first light receiving surface divided into four areas in a matrix manner, a second light receiving surface divided into four areas in a matrix manner, and a third light receiving surface divided at least into two areas aligned inline. Reflected light of three beams of 400 nm in wavelength and reflected light of three beams in 780 nm in wavelength are received on the first to third light receiving surfaces respectively, and a main beam of reflected light of 650 nm in wavelength is received on the first light receiving surface on one side out of the three light receiving surfaces.

Abstract: A drive unit for driving an objective lens of an optical head includes: a lens holder 12 for holding an objective lens; a plurality of coils Tr1, F11, F21, Tr2, F21, F22, which are provided on two sides 12a, 12b of the lens holder 12 by three coils; a plurality of wires of the first to the third wire W1 to W3 for supplying electric currents to the coils and for supporting the lens holder 12; magnets 31, 32 for generating a magnetic field in the coil portions, wherein the plurality of coils includes a first system coil F11, F12 connected between the first wire W1 and the common wire W4, a second system coil F21, F22 connected between the second wire W2 and the common wire W4, and a third system coil Tr1, Tr2 connected between the is third wire W3 and the common wire W4.

Abstract: The data recording and reproducing device includes a cantilever 11 having a probe h and extending so as to locate the tip of the probe h in the vicinity of a recording film 20, a piezo driving unit 12 for vibrating the cantilever 11, an optical lever 13 for detecting a displacement due to the vibration of the cantilever 11, a Z feedback circuit 33 for performing feedback control for the driving in a direction vertical to the table 21, a write circuit 18 for supplying a recording voltage to the cantilever 11 in response to a recording signal IN, a voltage circuit 16 and a variable bias circuit 17 for applying anAC voltage to the cantilever 11, and a V feedback circuit 34 for performing the feedback control for the bias voltage applied to the cantilever.

Abstract: An objective lens driving device for an optical head has a lens holder including one or more tracking coils, one or more focusing coils, a plurality of wires which supply control currents to the tracking coils and the focusing coils and which support the lens holder in a cantilever manner, and a pair of movable magnets which are provided on a lower face of the lens holder in a track direction with an interval therebetween. A base part includes a pair of fixed magnets which are arranged so as to be opposed to the tracking coils and the focusing coils of the lens holder thereby to act thereon, a pair of right and left coils for correcting tilt angles which are arranged so as to be respectively opposed to the movable magnets thereby to act thereon, and power supply lines for supplying control currents to the tilt angle correcting coils.

Abstract: An optical pickup includes a lens holder body having a first surface and a second surface opposing to each other, tracking coils, a focusing coil, and tilt coils which are formed on a pair of flat panels respectively disposed on the first and second surfaces, and first and second magnetic bodies respectively disposed to face the first and second surfaces of the lens holder body and each constituting a planar closed magnetic circuit.

Abstract: A battery device designed so that a plurality of battery modules (1) are arranged in rows at given spaces in a enclosure (2). Turbulence accelerators (5), such as dummy battery units or the like, are provided in a position on the uppermost-stream side of the enclosure in which air flows in the direction of arrangement of the battery modules. The heat transfer ability for the battery modules in the upper-stream position is enhanced by the turbulence accelerators which disorders the airflow introduced into the enclosure. Auxiliary coolant intake ports (7) for the introduction of a coolant are provided in the middle of an airflow path, whereby the heat transfer ability on the lower-stream side is enhanced, so that battery temperature differences between the battery units arranged in the enclosure can be restrained. Thus, a simple-construction battery device is realized enjoying improved quality and operation stability.

Abstract: Provided are a battery and a lead member, designed so that high strength of weld between them can be maintained with less variation despite the supply of lower welding current thereto when the lead member is welded to the outer surface of the battery by the parallel resistance welding method, and a battery pack using the same. A layer of an Ni-based alloy, e.g., an Ni—Fe alloy, is formed on a part or the whole of the outer surface of the battery. The lead member for battery connection is composed of a substrate and an Ni—Sn alloy layer formed on that surface of the substrate which is welded to the outer surface of the battery. The battery pack is composed of a battery group that is assembled by using the battery and/or the lead member and stored in a shell.

Abstract: An electric cell module is provided, which enables operations of connecting terminals in one direction and which is, as a whole, highly rigid and has excellent resistance to breakage. A pair of rod bodies 3A and 3B are arranged parallel to each other to be oriented in opposite polarities. Each rod body contains a plurality of electric cells 1 connected in series through cell connector portions 2. An electrical connecting structure 4 is formed on one end face of each rod body. The structure connects the rod bodies electrically to each other. A coupling jig 5 is incorporated to surround at least one juxtaposed pair of cell connector portions present at the same longitudinal position in the rod bodies.

Abstract: An optical disk device in which the laser beam emitted from a laser light source and deflected by a movable mirror is focused on an optical recording medium by an optical head section. Tracking control is carried out by a drive control section based on the laser beam reflected from the optical recording medium. A micro electrical mechanical system incorporating the movable mirror is housed in a package accommodating the laser light source. The movable mirror is driven by electrostatic force at a frequency of 0.5 KHz or higher.

Abstract: An objective lens supporting apparatus of an optical pickup includes a lens frame in which an objective lens is mounted; receiving member for receiving driving forces for displacing the objective lens in the direction of the optical axis and in a direction perpendicular to the optical axis is disposed; a support base in which generating member for generating the driving forces is disposed; an elastic member W extended from the support base and fixed to the lens frame for swingably supporting the lens in a cantilevered manner; and a tilting member for inclining the optical axis of the objective lens with respect to the support base by tilting the lens frame.

Abstract: A battery device designed so that a plurality of battery modules (1) are arranged in rows at given spaces in a enclosure (2). Turbulence accelerators (5), such as dummy battery units or the like, are provided in a position on the uppermost-stream side of the enclosure in which air flows in the direction of arrangement of the battery modules. The heat transfer ability for the battery modules in the upper-stream position is enhanced by the turbulence accelerators which disorders the airflow introduced into the enclosure. Auxiliary coolant intake ports (7) for the introduction of a coolant are provided in the middle of an airflow path, whereby the heat transfer ability on the lower-stream side is enhanced, so that battery temperature differences between the battery units arranged in the enclosure can be restrained. Thus, a simple-construction battery device is realized enjoying improved quality and operation stability.

Abstract: Provided are a battery and a lead member, designed so that high strength of weld between them can be maintained with less variation despite the supply of lower welding current thereto when the lead member is welded to the outer surface of the battery by the parallel resistance welding method, and a battery pack using the same. A layer of an Ni-based alloy, e.g., an Ni—Fe alloy, is formed on a part or the whole of the outer surface of the battery. The lead member for battery connection is composed of a substrate and an Ni—Sn alloy layer formed on that surface of the substrate which is welded to the outer surface of the battery. The battery pack is composed of a battery group that is assembled by using the battery and/or the lead member and stored in a shell.