Autofocus actuator

Details Autofocus actuator Autofocus actuator

2007-10-23

2007-10-23

Nguyen, Tran (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Linear

C310S014000, C359S814000, C359S824000, C369S044140, C369S044160, C369S044220

Reexamination Certificate

active

11173644

ABSTRACT:
An autofocus actuator1is provided with a yoke300that comprises an inner cylindrical portion301defining an insertion bore through which a hollow body portion of a holder is adapted to be received and an outer cylindrical portion302provided outside of the inner cylindrical portion301with a predetermined spacing left between the inner cylindrical portion301and the outer cylindrical portion302by a connecting portion, and the yoke300is constructed so as to receive a coil20in the space of a predetermined gap. The outer cylindrical portion302is formed into a generally polygonal cylindrical shape and inner surfaces of the outer cylindrical portion302define a plurality of magnet mounting surfaces each having a planar shape. A generally flat plate shape permanent magnet41is mounted on each of these magnet mounting surfaces303. By the use of such a flat plate shape permanent magnet41, it becomes possible to reduce a manufacturing cost and also possible to easily align and assemble the permanent magnets41.

REFERENCES:
patent: 5105405 (1992-04-01), Hashimoto et al.
patent: 5319497 (1994-06-01), Wakabayashi et al.
patent: 5999342 (1999-12-01), Okada et al.
patent: 6195314 (2001-02-01), Inui et al.
patent: 6212019 (2001-04-01), Yokouchi
patent: 58099256 (1983-06-01), None
patent: 2003-295033 (2003-10-01), None
patent: 2004-280031 (2004-07-01), None

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