JPS63109938U

JPS63109938U -

Info

Publication number: JPS63109938U
Application number: JP94587U
Authority: JP
Priority date: 1987-01-09
Filing date: 1987-01-09
Publication date: 1988-07-15
Anticipated expiration: 2002-01-09
Also published as: JP2515624Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の変倍光学装置のズームレン
ズ系の移動を説明するための概略図、第２図は変
倍光学装置の分解斜視図、第３図は、等倍率時の
状態を示す図、第４図は拡大倍率時の状態を示す
図、第５図は縮小倍率時の状態を示す図である。１……ズームレンズ系、１１……移動台、１５
……第１レンズ群、１６……第２レンズ群、２７
，２８……第１孔部、３３……移動板、３５，３
６……斜進溝、４２……ズームカム板、４３……
ズームカム。 Fig. 1 is a schematic diagram for explaining the movement of the zoom lens system of the variable magnification optical device of this invention, Fig. 2 is an exploded perspective view of the variable magnification optical device, and Fig. 3 shows the state at the same magnification. FIG. 4 is a diagram showing the state at the time of enlargement, and FIG. 5 is a diagram showing the state at the time of reduction. 1...Zoom lens system, 11...Moving table, 15
...First lens group, 16...Second lens group, 27
, 28... first hole, 33... moving plate, 35, 3
6... Diagonal advance groove, 42... Zoom cam plate, 43...
zoom cam.

Claims

[Scope of utility model registration request]

In a variable magnification optical device that performs zooming by changing the distance between at least some of the symmetrical lens groups among a plurality of symmetrically arranged lens groups, a first engaging member provided on each of the symmetrical lens groups; a first moving means for moving the entire lens group in a direction forming a predetermined angle with the optical axis of the lens group to change the magnification of reduction, equal magnification, and enlargement; and a guide means according to the movement of the first movement means. a second moving means that moves relative to the first engaging member when engaged; and a second moving means that engages with the first engaging member and moves the first moving means from a normal magnification position to a reduced position. A second moving means provided on the second moving means has a common part that engages with the first engaging member when moving from the same magnification position to the enlarged position, and displaces the interval between the symmetrical lens groups. A variable power optical device comprising two engaging members.