发明名称 |
Collapsible type zoom camera |
摘要 |
A miniaturized collapsible zoom camera changes viewfinder magnification in accordance with a change in the photographic magnification. The camera is equipped with a collapsible cam tube to cause a first lens group, which rotates around the optical axis, to move from a collapsed position to a position just before a minimum magnification position. Likewise, a zoom cam tube causes the first lens group, which rotates around the optical axis, to move from the minimum magnification position to a maximum magnification position. Sector gears are formed on the outer circumference of the collapsible cam tube and the zoom cam tube. Furthermore, the camera is equipped with a cam tube drive gear which cooperates with the sector gears. A drive motor causes the drive gear to rotate. Another gear cooperates only with the sector gear of the zoom cam tube while a variable power and movement mechanism causes variable power operation in the viewfinder.
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申请公布号 |
US5715482(A) |
申请公布日期 |
1998.02.03 |
申请号 |
US19970796855 |
申请日期 |
1997.02.07 |
申请人 |
NIKON CORPORATION |
发明人 |
WAKABAYASHI, HIROSHI;MIYAMOTO, HIDENORI;KATO, MINORU;SOSHI, ISAO;OMI, JUNICHI |
分类号 |
G03B13/10;G02B7/04;G02B7/08;G02B7/10;G03B5/00;G03B13/12;G03B15/03;G03B15/05;G03B17/04;(IPC1-7):G03B13/10;G03B1/18 |
主分类号 |
G03B13/10 |
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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