JPS6168218U

JPS6168218U -

Info

Publication number: JPS6168218U
Application number: JP15347284U
Authority: JP
Priority date: 1984-10-11
Filing date: 1984-10-11
Publication date: 1986-05-10

Description

[Brief explanation of the drawing]

第１図は本考案によるズームレンズ鏡胴機構の
望ましい実施例の一部分断面とせる側面図。第２
図は第１図の線−による頂面図。第３図は第
１図のズームレンズ鏡胴機構の変形形態を示す部
分的断面図。第４図は本考案による距離環の微調
整を簡単になした構成を示す部分的断面図。１……ズームレンズ鏡胴本体、２……第一群レ
ンズ素子、３，９，１０……レンズ枠、５……円
筒カム、６……ガイドポール、７，８……第二群
レンズ素子、１１……第三群レンズ素子、１４…
…カムローラー、１５，１５′……ズームリング
、１５ｂ，１９……連結装置。 FIG. 1 is a partially sectional side view of a preferred embodiment of a zoom lens barrel mechanism according to the present invention. Second
The figure is a top view taken along the line - in FIG. FIG. 3 is a partial sectional view showing a modification of the zoom lens barrel mechanism shown in FIG. 1. FIG. 4 is a partial sectional view showing a configuration in which fine adjustment of the distance ring according to the present invention is made easy. 1... Zoom lens barrel body, 2... First group lens element, 3, 9, 10... Lens frame, 5... Cylindrical cam, 6... Guide pole, 7, 8... Second group lens element , 11... third group lens element, 14...
...Cam roller, 15, 15'...Zoom ring, 15b, 19...Connection device.

Claims

[Claims for Utility Model Registration] (1) A cylindrical cam rotatably supported within a lens barrel body and having a cam groove for driving a zoom lens;
a zoom lens drive device that is rotatably disposed outside the main body and rotates in conjunction with the cylindrical cam; and a zoom lens drive device that is slidably engaged with the cam groove of the cylindrical cam and is driven by the operation of the cylindrical cam. a zoom lens barrel having an engaging element that is driven by the cylindrical cam, and a zoom lens element supported by a zoom lens frame that is prevented from rotating within the cylindrical cam and is driven to slide in the axial direction. A zoom lens barrel mechanism, characterized in that the zoom lens barrel mechanism has a coupling device that supports the zoom lens drive device at a distance from the outer periphery of the zoom lens barrel main body and directly interlocks with the cylindrical cam. (2) A utility model characterized in that the zoom lens driving device is a zoom ring surrounding the outer periphery of the main body, and the connecting device is integrally formed with the zoom ring and directly attached to the cylindrical cam. A zoom lens barrel mechanism according to claim 1. (3) The zoom lens driving device is a zoom lever separated from the outside of the main body, and the connecting device is formed integrally with the zoom lever and is directly attached to the cylindrical cam. A zoom lens barrel mechanism according to claim 1 of the utility model registration claim. (4) The connecting device is formed as a connecting device separate from the zoom lens driving device, and the zoom lens driving device is a zoom ring attached to the cylindrical cam via the connecting device. A zoom lens barrel mechanism according to claim 1 of the utility model registration claim. (5) The connecting device is formed as a connecting device separate from the zoom lens driving device, and the zoom lens driving device is a zoom lever attached to the cylindrical cam via the connecting device. A zoom lens barrel mechanism according to claim 1 of the utility model registration claim.