Nidec Sankyo Corporation

Akihito Wada

Tatsuki Wade

Toshifumi Tsuruta

Tsuneo Sato

Takeshi Sue

Noboru Otsuki

Hideki Kanebako

Daisuke Higuchi

Masahiro Ikeda

Hiromi Fukasawa

A lens drive device may include a front side spring member which is connected between a movable body having a lens and a support body. The front side spring member includes a support body side connecting part, a movable body side connecting part and a arm part connected between the support body side connecting part and the movable body side connecting part. The support body includes a yoke having a yoke front plate part and the yoke front plate part is formed with a yoke opening part which is overlapped with at least a part of the front side spring member. Damper material having viscoelasticity is provided, for example, on a portion extending over the movable body side connecting part and the arm part and overlapped with the yoke opening part in the lens optical axis direction. Therefore, the damper material can be applied to the front side spring member through the yoke opening part in the final stage of assembling steps.

Lens drive device

A lens driving device may include a movable lens body which holds a lens, and a driving mechanism for moving the movable lens body in an optical axis direction. The driving mechanism includes coils attached to the movable lens body, and a magnet opposed to the coils. When a gap between the coils and the magnet is expressed as A, and the width of the coil is expressed as B, a conditional expression of 0.3B&#x2266;A&#x2266;B is satisfied.

Lens driving device

A lens drive device may include a movable body holding a lens and a drive mechanism for driving the movable body in the optical axis direction. The drive mechanism may include a drive magnet part formed in a substantially triangular prism shape which is disposed at least one of four corners of the lens drive device, a drive coil wound around in a substantially triangular tube shape so that its inner peripheral face is oppositely disposed to an outer peripheral face of the drive magnet part through a gap space, and a magnetic member which is disposed on an object side with respect to the drive coil. The magnetic member is attracted toward an intermediate position of the drive magnet part in the optical axis direction.

A lens drive device may include a movable body holding a lens, a fixed body movably holding the movable body, and a drive mechanism for driving the movable body in the optical axis direction. The drive mechanism may include a drive magnet part formed in a substantially triangular prism shape and disposed at least in one of four corners of the lens drive device, a drive coil wound around in a substantially triangular tube shape and attached to the movable body, and a coil protection member attached to at least one of an object side and an opposite-to-object side of the drive coil. The coil protection member may include a first coil protection end part and a second coil protection end part which are superposed on an outer side end of the drive coil or protruded toward an outer side from the outer side end of the drive coil to prevent the drive coil from contacting with the fixed body such as a case body.

A lens drive device may include a movable body provided with a lens and a drive mechanism for driving the movable body in the optical axis direction. The drive mechanism may include a substantially triangular prism-shaped drive magnet part disposed in at least one of four corners of the lens drive device, and a drive coil wound around a substantially triangular tube shape and whose inner peripheral face is oppositely disposed to an outer peripheral face of the drive magnet part through a gap space. In at least another embodiment, a lens drive device may include a flat spring provided with a plurality of arm parts which connect a movable body fixed part with a fixed body fixed part. The arm part is formed with a low spring constant part whose spring constant is smaller than a spring constant of other portion of the arm part.

A media processing device may include a frame with a transport passage in which information recording media are transported and a magnetic head for processing magnetic information signals on the information recording media. The magnetic head may be embedded in the frame and part of the frame may be interposed between the magnetic head and the transport passage.

Media processing device and magnetic head applicable to it

A lens driving apparatus may include a movable body holding lenses; a support body for supporting said movable body to move in the optical axis direction of said lenses; and a drive mechanism for driving said movable body in the optical axis direction; wherein said movable body is provided with an extension portion that is extended toward the outer periphery, and a moving path and a movement-stopping portion are formed to at least a member of said drive mechanism mounted on the support body or to said support body, said moving path allowing said extension portion to move in the optical axis direction when said movable body is moved in the optical axis direction and said movement-stopping portion regulating the moving range of said movable body as said extension portion makes contact with said movement-stopping portion.

Lens driving apparatus

A lens drive device may include a movable lens body provided with a lens, a support body which movably supports the movable lens body through a plate spring in an optical axis direction, and a magnetic drive mechanism for driving the movable lens body in the optical axis direction. The plate spring may include an outer side connecting part connected with the support body, an inner side connecting part connected with the movable lens body, and an arm part which is connected with the inner side connecting part and the outer side connecting part through an inner connecting portion and an outer connecting portion. The arm part may include a meandering part which comprises a plurality of extending parts which is extended in a radial direction is serially connected through inner side turning portions and outer side turning portions.

Growing community of inventors

Nagano, Japan

Akihito Wada