发明名称 |
Exposure control device for camera |
摘要 |
Disclosed is an exposure control device for a camera. The exposure control device has a magnetic plunger including a permanent magnet and a plunger coil. The plunger coil generates, when energized, a magnetic field which weakens a magnetic force of the permanent magnet. A resistor is connected in parallel with the plunger coil. Resistance of the resistor is substantially equal to a DC resistance of the plunger coil.
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申请公布号 |
US5930535(A) |
申请公布日期 |
1999.07.27 |
申请号 |
US19970982356 |
申请日期 |
1997.12.02 |
申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
KAWAKAMI, SOHICHIROH |
分类号 |
G03B7/095;(IPC1-7):G03B7/085;H01F7/18 |
主分类号 |
G03B7/095 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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