Nidec Sankyo Corporation

Kabushiki Kaisha Sankyo Seiki Seisakusho

Sankyo Seiki Mfg. Co., Ltd

Hiroshi Sugihara

Tatsuki Wade

Mitsuo Yokozawa

Kiyotsugu Takasawa

Kenji Muramatsu

A linear actuator may include a fixed body having a coil wound around in a ring-shaped manner and a movable body. The movable body may include a first movable body side yoke which is disposed on the inner side of the coil and a pair of magnets which is laminated on both sides in an axial direction of the first movable body side yoke such that the same polarities of the magnets face the first movable body side yoke. The movable body may be driven in the axial direction. The linear actuator may be applied to a valve device and a pump device.

Linear actuator, and valve device and pump device using the same

An optical pickup apparatus has an objective lens that converges a laser beam on an optical recording medium and a lens holder that retains objective lens. The optical pickup apparatus also has a base member, four linear members having base ends supported by the base member and distal ends coupled to the lens holder. A driving device generates a magnetic force between the lens holder and the base member to elastically deform the linear members to thereby drive the objective lens in a focusing direction and/or a tracking direction. The four linear members have generally an identical configuration, and at least one portion of each of the four linear members in a longitudinal direction thereof has a cross section that is compressed and deformed in the focusing direction and/or tracking direction.

Optical pickup apparatus and method of manufacturing the same

In an optical pickup device, wires A through D resiliently support a lens holder in a cantilever fashion. Of the wires, wires A and C arranged so as to overlap when viewed in a tracking direction are fixed together by heat sealing. The wires B and D are arranged independently of each other. In each of the wires A through D, a portion close to the base end of the wire is squeezed from a focusing direction, and a portion close to the tip end of the wires is squeezed from the tracking direction.

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Nagano, Japan

Hiroshi Sugihara