JPS60186414U - lens drive mechanism - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案に係るレンズ駆動機構を有するぇニレ７
１ヨ。。９ｏエウ。４．。６゜ぞの要蔀分解斜視図であ
る。 Ｌｌ・・・前玉、Ｌ２・・・変倍系レンズ群、Ｌ３・・
・補正系レンズ群、Ｌ４．Ｌ６・・・後部レンズ群、Ｌ
５・・・後部レンズ群のフォーカス用レンズ、１・・・
固定筒、１′　・・・・小口径筒部、２・・・絞りユニ
ット、４・・・ズー云−環、５・・・カム筒、６・・・
変倍系移動環、７・・・補正系移動環、８・・・移動筒
、８ａ・・・おすヘリコイド、８　　　　ｂ・・・キー
溝、９・・・７オーク環、９ａ、・・・フォーク部、１
１・・・二段ギヤ、１３・・・モータ。Figure 1 shows Elm 7, which has a lens drive mechanism according to the present invention.
1yo. . 9o eu. 4. . It is an exploded perspective view of the main part at a 6° angle. Ll...front lens, L2...variable magnification lens group, L3...
- Correction lens group, L4. L6...Rear lens group, L
5...Focusing lens of rear lens group, 1...
Fixed cylinder, 1'...Small diameter cylinder part, 2...Aperture unit, 4...Zoo ring, 5...Cam cylinder, 6...
Magnification system moving ring, 7... Correction system moving ring, 8... Moving tube, 8a... Male helicoid, 8 b... Keyway, 9... 7 Oak ring, 9a,... Fork part, 1
1...Two-stage gear, 13...Motor.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 固定筒と該固定筒の小口径筒部に嵌装した後群のフォー
カス用レンズを保持また移動筒とをヘリコイド結合し、
該固定筒の小口径筒部の外周にモータからの回転力を受
けて定位置回動する４、フォーク環を嵌装し、該フォー
ク環は該固定筒の小口径筒部内に光軸平行方向に伸長し
たフォーク部が該移動筒に形成したキー溝に係合され、
該フォーク環の回動により該移動筒を光軸方向に進退移
動す、るようにしたレンズ駆動機構。a fixed barrel and a movable barrel that holds a rear group focusing lens fitted in a small-diameter barrel portion of the fixed barrel;
A fork ring is fitted on the outer periphery of the small-diameter cylindrical portion of the fixed tube, and the fork ring rotates in a fixed position in response to the rotational force from the motor, and the fork ring is inserted into the small-diameter cylindrical portion of the fixed tube in a direction parallel to the optical axis. the fork portion extending into the movable tube is engaged with a keyway formed in the movable cylinder;
A lens drive mechanism configured to move the movable barrel forward and backward in an optical axis direction by rotation of the fork ring.