| 发明名称 |
Travel-limit circuit for limiting the travel of a zoom or focus lens in a closed circuit television (CCTV) camera |
| 摘要 |
A DC motor (11) drives a moving lens. Limit switches detect when the lens has reached its mechanical travel extremities. Upon reaching an extremity, the corresponding limit switch cuts the power to the motor by short-circuiting its input terminals (12,13).
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| 申请公布号 |
DE19903217(A1) |
申请公布日期 |
1999.09.02 |
| 申请号 |
DE19991003217 |
申请日期 |
1999.01.27 |
| 申请人 |
ASAHI SEIMITSU K.K. |
发明人 |
SHIKANO, TORU;ARAI, MASAYUKI |
| 分类号 |
G02B7/04;G02B7/10;H02P3/00;(IPC1-7):G02B7/10;G03B13/34;H02M3/00;H02P7/00;H04N5/232 |
主分类号 |
G02B7/04 |
| 代理机构 |
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代理人 |
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