Sector drive mechanism

Details Sector drive mechanism Sector drive mechanism

2008-03-04

2008-03-04

Perkey, W. B. (Department: 2862)

Photography

Camera detail

Shutter

C396S463000, C396S493000, C396S501000

Reexamination Certificate

active

11371980

ABSTRACT:
A sector drive mechanism includes an electromagnetic actuator including a rotor having four polarities, a C-shaped stator, and a current control portion that controls current applied to a first coil and a second coil, the C-shaped stator including a first magnetic pole magnetically excited by the first coil, a second magnetic pole magnetically excited by the second coil, and a third magnetic pole magnetically excited by the first coil and the second coil, and sectors that are connected to the electromagnetic actuator to open and close a shutter opening provided in a substrate. The first coil and the second coil are driven to close the shutter opening with a fewer number of pulses applied from the current control portion than the number of the pulses to open the shutter opening.

REFERENCES:
patent: 4371821 (1983-02-01), Laesser et al.
patent: 5040017 (1991-08-01), Arai
patent: 1264597 (1989-10-01), None
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patent: 3122628 (1991-05-01), None
patent: 5027299 (1993-02-01), None
patent: 9015678 (1997-01-01), None
patent: 2001061268 (2001-03-01), None
patent: 2002062561 (2002-02-01), None
International Search Report for PCT/JP2004/013151, dated Oct. 19, 2004.

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