JPS58154907U

JPS58154907U - zoom lens barrel

Info

Publication number: JPS58154907U
Application number: JP5289482U
Authority: JP
Inventors: 榎本　恵治
Original assignee: 株式会社リコー
Priority date: 1982-04-12
Filing date: 1982-04-12
Publication date: 1983-10-17

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

[Brief explanation of drawings]

第１図は本考案の実施例を示すものであつ（下半部で短
焦点状態を下半部で長焦点状態を示す断面図、第２図は
同上実施例のカム枠の部分を示す展開図、第３図は同上
実施例の移動枠の部分を示す展開図である。４・・・ズームライナ、４ａ、　　４ｂ、　　４ｃ・・
・直進溝、５・・・カム枠、５ａ、　　５ｂ、　　５ｃ
・・・カム溝、６・・・ズームリング、７・・・第１群
移動枠、９・・・第２群移動枠、１１・・・第３群移動
枠、１２・・・駒部材、８．１０゜１４・・・ピン。Fig. 1 shows an embodiment of the present invention (a cross-sectional view showing a short focus state in the lower half and a long focus state in the lower half, and Fig. 2 is an exploded view showing the cam frame part of the same embodiment). FIG. 3 is a developed view showing the movable frame portion of the same embodiment. 4...Zoom liner, 4a, 4b, 4c...
・Straight groove, 5...Cam frame, 5a, 5b, 5c
... Cam groove, 6... Zoom ring, 7... First group moving frame, 9... Second group moving frame, 11... Third group moving frame, 12... Bridge member, 8.10°14...pin.

Claims

[Claims for Utility Model Registration] 1. A plurality of cam grooves are formed in one cam frame that moves by operating a zooming operation member, and pins provided in the movement frames of a plurality of lens groups are respectively fitted into the cam grooves. In the zoom lens barrel in which each of the lens groups is relatively moved by operating a zooming operation member, the relative position in the optical axis direction of at least one of the lens groups to the moving frame can be adjusted. A zoom lens barrel characterized in that a bridge member is fixed to the bridge member, a pin is provided on the bridge member, and the pin is fitted into one of the force lJ. 2. The zoom lens barrel according to claim 1, wherein the lens group is configured into three groups. 3. The zoom lens barrel according to claim 1, wherein the bridge member is fixed to the movable frame of the third lens group. 4. The zoom lens barrel according to claim 1, wherein the cam frame is rotatable around the optical axis. 5. Utility model registration claim 1, in which the bridge member is loosely fitted to the adjacent moving frame in the optical axis direction.
The zoom lens barrel described in section.