JPS62184532U

JPS62184532U -

Info

Publication number: JPS62184532U
Application number: JP7216386U
Authority: JP
Priority date: 1986-05-14
Filing date: 1986-05-14
Publication date: 1987-11-24

Description

[Brief explanation of the drawing]

第１図は、この考案による鏡筒の実施例の縦断
面図であり、第２図は、横断面図である。１……主レンズ、２……鏡筒、３……第１の摺
動筒、８……第２の摺動筒、９……補助レンズ、
１０……揺動レバー、１９……カム筒、２０……
係合部、２３，２７……カム溝。 FIG. 1 is a longitudinal cross-sectional view of an embodiment of the lens barrel according to this invention, and FIG. 2 is a cross-sectional view. 1... Main lens, 2... Lens barrel, 3... First sliding tube, 8... Second sliding tube, 9... Auxiliary lens,
10... Swing lever, 19... Cam tube, 20...
Engagement portion, 23, 27... cam groove.

Claims

[Scope of utility model registration request]

In a lens barrel that is equipped with a plurality of lenses and whose focal length is made variable by selecting the combination of these lenses and the relative positional relationship in the optical axis direction,
A main lens attached to a first sliding tube and movable in the direction of the optical axis, an auxiliary lens attached to a swinging member so as to be insertable and detachable on the optical axis, and the swinging member is swingably held. and a second sliding tube that is slidable in the optical axis direction, and a cam groove that engages with a cam pin provided on each of the first and second sliding tubes,
A cam barrel that can be driven and rotated from the outside and has an engaging portion that hits the swinging member and detaches the auxiliary lens off the optical axis when rotated by a predetermined angle. The driving rotation of the cam barrel changes the relative position of the main lens and the auxiliary lens on the optical axis to make the focal length variable, and the rotation of the cam barrel through the predetermined angle removes the auxiliary lens from the optical axis. A variable focal length lens barrel that allows you to select the focal length using only the main lens.