JPH02117510U

JPH02117510U -

Info

Publication number: JPH02117510U
Application number: JP2680389U
Authority: JP
Priority date: 1989-03-09
Filing date: 1989-03-09
Publication date: 1990-09-20

Description

[Brief explanation of drawings]

第１図は本考案のレンズ鏡筒の第一の実施例を
示す上半断面図である。第２図ないし第５図は本
考案の第二の実施例を示すもので、第２図、第３
図、第４図は、それぞれ収納状態、ワイド端状態
、テレ端状態を示す上半断面図、第５図はカム環
の展開図である。１……カム環、１ａ，１ｂ……インナカム溝、
１ｃ……ギヤ、５，６……移動レンズ、５ａ，６
ａ……ガイドピン、１１……カメラボデイ、１２
……固定筒、１５，１６……移動レンズ、１８…
…外側ヘリコイド（内周ヘリコイド）、２２……
カム環、２２ａ……ヘリコイド、２２ｂ……ギヤ
、２２ｃ，２２ｄ……インナカム溝、２４……レ
ンズ案内環、２６……直進案内板、３０……前群
レンズ枠、３１……後群レンズ枠、３２……シヤ
ツタブロツク、３４……前群移動枠、３５，３６
……ガイドピン。 FIG. 1 is an upper half sectional view showing a first embodiment of the lens barrel of the present invention. Figures 2 to 5 show a second embodiment of the present invention.
4 are upper half cross-sectional views showing the stored state, wide end state, and telephoto end state, respectively, and FIG. 5 is a developed view of the cam ring. 1...Cam ring, 1a, 1b...Inner cam groove,
1c... Gear, 5, 6... Moving lens, 5a, 6
a... Guide pin, 11... Camera body, 12
...Fixed barrel, 15, 16...Moving lens, 18...
...Outer helicoid (inner helicoid), 22...
Cam ring, 22a... Helicoid, 22b... Gear, 22c, 22d... Inner cam groove, 24... Lens guide ring, 26... Straight guide plate, 30... Front group lens frame, 31... Rear group lens frame , 32...Shutter block, 34...Front group movement frame, 35, 36
……guide pin.

Claims

[Claims for Utility Model Registration] (1) A rotationally driven cam ring having a cam groove; having a guide pin that engages with the cam groove of the cam ring;
In a lens barrel comprising a lens group that moves in the optical axis direction as the cam ring rotates; and a gear provided on the outer periphery of the cam ring for rotationally driving the cam ring, a cam groove of the cam ring; 1. A lens barrel having a cam ring, wherein at least a part of the cam ring is formed as an inner cam groove whose outer surface is closed, and the gear is integrally molded on the outer surface of the cam ring. (2) a rotationally driven cam ring having a cam groove; having a guide pin that engages with the cam groove of the cam ring;
A lens barrel comprising: a lens group that moves in the optical axis direction as the cam ring rotates; and a helicoid provided on the outer periphery of the cam ring that supports the cam ring so as to move it in the optical axis direction as the cam ring rotates. , a lens barrel having a cam ring, characterized in that at least a part of the cam groove of the cam ring is formed as an inner cam groove with a closed outer surface, and the helicoid is integrally molded on the outer surface of the cam ring. . (3) a rotationally driven cam ring having a cam groove; having a guide pin that engages with the cam groove of the cam ring;
a lens group that moves in the optical axis direction as the cam ring rotates; a gear provided on the outer periphery of the cam ring for rotationally driving the cam ring; and a gear that moves the cam ring in the optical axis direction as the cam ring rotates; and a helicoid provided on the outer periphery of the cam ring, the cam ring having at least a part of the cam groove formed as an inner cam groove with a closed outer surface, and A lens barrel having a cam ring on the outer surface of which the gear and helicoid are integrally molded. (4) In any one of claims 1 to 3, the cam ring and the gear or (and) the helicoid are
A lens barrel that is integrally molded from synthetic resin material. (5) The lens barrel according to any one of claims 1 to 3, wherein the cam groove has a nonlinear shape.