Lens assembly

Details Lens assembly Lens assembly

1996-08-12

1998-04-14

Nelms, David C.

Optical: systems and elements

Lens

With variable magnification

359702, G02B 1514

Patent

active

057399638

ABSTRACT:
For the purpose of providing a lens assembly for connecting a cam ring and an advance guide barrel by a simple construction without increasing the overall length, a connector having a protrusion extending to the interior side in the radius direction is formed on the posterior end of a cam ring provided with a cam channel of predetermined configuration on a barrel-like body. From the connector side, a cam ring engages an advance guide barrel provided with guide channels. Although the connector is flexed as the protrusion abuts the exterior surface of the advance guide barrel at this time, said connector is restored to its original position when the protrusion arrives at the endface of the advance guide barrel. Thus, the protrusion engages the endface of the advance guide barrel, and the cam ring engages the advance guide barrel.

REFERENCES:
patent: 4154510 (1979-05-01), Katagiri
patent: 4737017 (1988-04-01), Nagasaka

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