Taking lens drive unit

Details Taking lens drive unit Taking lens drive unit

1998-09-23

2000-03-07

Perkey, W.B.

Photography

Having variable focal length of camera objective

Manually selected preset zoom position or range

396 86, G03B 1700, G02B 1514

Patent

active

060351373

ABSTRACT:
If a seesaw switch and a quick zoom switch means are operated concurrently, the seesaw switch takes priority. If the quick zoom switch is operated by mistake while the seesaw switch is operated, the operation of the quick zoom switch is invalidated. The seesaw switch continues the operation without suspending the photography. While the seesaw switch is operated, the taking lens is moved with a set maximum zoom rate being the upper limit. When the taking lens moves in accordance with the operation of the quick zoom switch, the set maximum rate is cancelled so that the taking lens can be zoomed at a preset zoom rate. Consequently, the zooming is performed quickly in accordance with the operation of the quick zoom switch.

REFERENCES:
patent: 3834796 (1974-09-01), Komine
patent: 3940777 (1976-02-01), Komine
patent: 4937602 (1990-06-01), Himuro et al.
patent: 5189458 (1993-02-01), Miyamoto et al.

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