| 摘要 |
PROBLEM TO BE SOLVED: To achieve the reduction of cost while maintaining compact and thin constitution, in a blade drive device for a camera constituted so that a plurality of electromagnetic actuators can drive individual blades. SOLUTION: A frame member 7 made of synthetic resin, where coils 8 and 9 are wound round two bobbin parts 7a and 7b integrally molded, is attached to mounting shafts 1m, 1n, 1p and 1q erected on a bottom board 1 made of synthetic resin by thermal caulking. Two rotors 5 and 6 are rotatably attached to two rotary shafts 1r and 1s formed on the bottom board 1. Two yokes 10 and 11 are attached to the mounting shafts 1q and 1p together with the frame member 7 by fitting their one-sided leg parts 10a and 11a in the hollow parts of the bobbin parts 7a and 7b. A drive pin 5c integrated with the rotator 5 is coupled to a shutter blade 4 in a blade chamber, and a drive pin 6c integrated with the rotor 6 is coupled to a diaphragm blade 3 in the blade chamber. COPYRIGHT: (C)2008,JPO&INPIT
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