Telescoping type of zoom lens and cam mechanism therefor

Details Telescoping type of zoom lens and cam mechanism therefor Telescoping type of zoom lens and cam mechanism therefor

1997-01-09

1998-06-09

Adams, Russell E.

Photography

Having variable focal length of camera objective

396 85, 359696, 359700, 359704, G03B 1700

Patent

active

057650489

ABSTRACT:
A lens barrel has first, second and third barrels concentrically arranged in this order from an optical axis. The lens barrel includes at least one cam slot formed on the second barrel and extending oblique to a direction of the optical axis, at least one guide groove formed on an inner periphery of the third barrel, at least one follower formed on an outer periphery of the first barrel and engaging with the at least one guide groove through the at least one cam slot, and at least one member integrally formed on an outer periphery of the second barrel adjacent to an end of the at least one cam slot. The at least one member includes a surface formed thereon to contact the at least one follower when the at least one follower moves to the end of the at least one cam slot.

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United Kingdom Search Report.

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