Locking mechanism of zoom lens

Details Locking mechanism of zoom lens Locking mechanism of zoom lens

1996-04-23

1998-03-10

Nelms, David C.

Optical: systems and elements

Lens

With variable magnification

G02B 1522

Patent

active

057268126

ABSTRACT:
A locking mechanism of zoom lens which is primarily applied on zoom lens to prevent the lens group of the zoom lens to prevent the lens group of the zoom lens structure from entering into the non-zooming zone of the curvilinear slots through its zooming zone. The said locking mechanism of zoom lens mainly consists of a reverse rotation stopping block, a spring-loaded restoring slider, a stopping piece and a cap. Among them, the reverse rotation stopping block is fixed at the linear-slot-sleeve in the said zoom lens structure through the transverse slot of curvilinear-slot-sleeve and the outer sleeve in the said zoom lens structure; the cap is fixed on the said stopping block, and the said stopping piece has one end with inclined plane which can make the reverse rotation stopping block to move, only in one direction, along the transverse slots on the curvilinear-slot-sleeve and its outer sleeve and enable the lens group of the said zoom lens structure to enter into the zooming operation zone of the said curvilinear-slot-sleeve through the non-zooming operation zone of the said curvilinear-slot-sleeve to perform zooming action. Whenever one does not need to use the zoom lens, one can press the cap directly to make the inclined plane's end retreat from the transverse slot of the outer sleeve which, in sequence, makes the lens group enter the zooming operation zone of the said curvilinear slots through the non-zooming operation zone of the said curvilinear slots to attain the object of shortening the zoom lens.

REFERENCES:
patent: 4466709 (1984-08-01), Osawa

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