JPH0342140U

JPH0342140U -

Info

Publication number: JPH0342140U
Application number: JP10222789U
Authority: JP
Priority date: 1989-08-31
Filing date: 1989-08-31
Publication date: 1991-04-22

Description

[Brief explanation of drawings]

図面はこの考案に係る初期焦点調節機構の好ま
しい実施例を示すものである。第１図は、光軸を
含む垂直面で切断した一部省略断面図である。第
２図は、調節部材を説明するための、要部の分解
斜視図である。第３図および第４図は、二焦点カ
メラの概略を説明するための図で、光軸を含む水
平面で切断した断面図であり、第３図はワイド撮
影時を、第４図はテレ撮影時をそれぞれ示してい
る。２……前群レンズ、４……後群レンズ、６……
移動鏡筒、６ａ……壁部、６ｂ……蓋体、８……
カメラ本体、１０……固定鏡筒、１６……前群レ
ンズ保持部材、２０……後群レンズ保持部材、２
０ｂ……カム溝、２２……支持軸、２４……後群
レンズ調節部材、２６……駆動バネ、３０……調
節部材、３２……押えバネ。 The drawings show a preferred embodiment of the initial focus adjustment mechanism according to the invention. FIG. 1 is a partially omitted sectional view taken along a vertical plane including the optical axis. FIG. 2 is an exploded perspective view of essential parts for explaining the adjustment member. Figures 3 and 4 are diagrams for explaining the outline of a bifocal camera, and are cross-sectional views taken along a horizontal plane that includes the optical axis. Figure 3 is for wide shooting, and Figure 4 is for telephoto shooting. Each shows the time. 2...Front group lens, 4...Rear group lens, 6...
Movable lens barrel, 6a...wall, 6b...lid, 8...
Camera body, 10... Fixed lens barrel, 16... Front group lens holding member, 20... Rear group lens holding member, 2
0b...Cam groove, 22...Support shaft, 24...Rear group lens adjustment member, 26...Drive spring, 30...Adjustment member, 32...Pressure spring.

Claims

[Claims for Utility Model Registration] Equipped with a variable focus device that has a plurality of taking lenses and changes the focal length by positioning or withdrawing appropriate ones of the plurality of taking lenses from the optical path. In the camera, the movement of the photographic lens into the optical path and the movement of the photographic lens with respect to the optical path are performed by rotating the photographic lens within a plane in the optical axis direction about a support shaft, and the photographic lens is In the initial focus adjustment mechanism of a camera with a variable focus device that performs initial reference focus adjustment by moving in the axial direction, the photographic lens is held and is slid relative to the support shaft in the axial direction of the support shaft. A cam groove is formed in the base of the flexible lens holding member, and an adjustment member having an adjustment pin inserted into the cam groove is provided near the base;
An initial focus adjustment mechanism for a camera with a variable focus device, characterized in that reference focus is adjusted by operating the adjustment member to move the adjustment pin in the axial direction of the support shaft.