JPH0229014U - - Google Patents

Description

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

図面は本考案の一実施例を示し、第１図は第２
図上のＢ―Ｂ線に沿つて切断したズームレンズ鏡
胴の断面図、第２図は第１図上のＡ―Ａ線に沿つ
て切断して同ズームレンズ鏡胴の断面図、第３図
は第２図上のＣ―Ｃ線に沿つて切断した同ズーム
レンズ鏡胴の上半部分の断面図、第４図は同ズー
ムレンズ鏡胴の分解斜視図、第５図ａはズーミン
グ用カム筒の前面を示す簡略図、第５図ｂは同カ
ム筒の後面を示す簡略図、第６図ａは焦点整合用
カム筒の前面を示す簡略図、第６図ｂは同カム筒
の後面を示す簡略図、第７図はばね受枠を移動筒
に固着するねじ止め構造を示す部分図、第８図は
ズーミングの動作を示す部分断面図、第９図は焦
点の整合動作を示す部分断面図である。 １１……固定枠、１２……移動筒、１２ａ，１
２ｂ……凸条部、１３……ズーミング用のカム筒
、１３ａ……第１のカム孔、１３ｂ……第２のカ
ム孔、１３ｄ……弧状細孔、１３ｅ……切込溝、
１４……焦点整合用のカム筒、１４ａ……カム孔
、１４ｃ……弧状細孔、１４ｄ……切込溝、１５
……第１移動枠、１６……第２移動枠、１８ａ，
１８ｂ，１８ｃ……カムフオロア、２１ｃ……ス
トツパー、２３ａ，２３ｂ，２３ｃ……カムフオ
ロア、２６ａ，２６ｂ，２６ｃ……カムフオロア
、３０ｃ……ストツパー。 The drawings show one embodiment of the present invention, and FIG.
2 is a cross-sectional view of the zoom lens barrel taken along the line B-B in the figure; FIG. 2 is a cross-sectional view of the zoom lens barrel taken along the line A-A in FIG. 1; The figure is a sectional view of the upper half of the zoom lens barrel taken along line C-C in Figure 2, Figure 4 is an exploded perspective view of the zoom lens barrel, and Figure 5a is for zooming. FIG. 5b is a simplified diagram showing the front surface of the cam barrel, FIG. 5b is a simplified diagram showing the rear surface of the cam barrel, FIG. 6a is a simplified diagram showing the front surface of the focusing cam barrel, and FIG. A simplified view showing the rear surface, FIG. 7 is a partial view showing the screw fastening structure for fixing the spring receiving frame to the movable tube, FIG. 8 is a partial cross-sectional view showing the zooming operation, and FIG. 9 is a partial view showing the focus alignment operation. FIG. 11... fixed frame, 12... movable tube, 12a, 1
2b... Convex strip, 13... Cam tube for zooming, 13a... First cam hole, 13b... Second cam hole, 13d... Arc-shaped pore, 13e... Cut groove,
14... Cam barrel for focusing, 14a... Cam hole, 14c... Arc-shaped pore, 14d... Cut groove, 15
...First moving frame, 16... Second moving frame, 18a,
18b, 18c...cam follower, 21c...stopper, 23a, 23b, 23c...cam follower, 26a, 26b, 26c...cam follower, 30c...stopper.

Claims (1)

【実用新案登録請求の範囲】 (1) ズームレンズ鏡胴に備えるカム筒と移動筒
とを、周囲方向に形成した弧状凸条部と弧状細孔
とによるバヨネツト構成によつて回動自在に連結
すると共に、カム筒には少なくとも２系統の第１
、第２カムの他に、筒端部周囲に沿つた所定の長
さの切込部を設け、さらに、上記第１のカムに対
接させる固定したカムフオロア及び上記切込部に
突入させてカム筒の回動範囲を定めるストツパー
を設け、カム筒と共に光軸方向に移動する移動筒
と、カム筒の回動により第２のカムに連動する連
動部材とに支持させた光学系を変位させてズーミ
ングする構成としたことを特徴とするズームレン
ズ鏡胴。 (2) 移動筒にバヨネツト構成により連結した上
記のズーミング用カム筒を前位置に、同様にこの
移動筒に連結した今一つのカム筒を後位置に各々
設け、焦点整合用の光学系を支持する連動部材を
上記した今一つのカム筒に連動させたことを特徴
とするズームレンズ鏡胴。[Scope of Claim for Utility Model Registration] (1) A cam barrel and a movable barrel provided in a zoom lens barrel are rotatably connected by a bayonet configuration consisting of arcuate protrusions and arcuate pores formed in the circumferential direction. At the same time, the cam cylinder has at least two systems of first
, in addition to the second cam, a notch of a predetermined length is provided along the periphery of the cylinder end, and a fixed cam follower is provided that faces the first cam, and the cam is inserted into the notch. A stopper is provided to determine the rotation range of the cylinder, and an optical system supported by a movable cylinder that moves in the optical axis direction together with the cam cylinder and an interlocking member that interlocks with the second cam by rotation of the cam cylinder is displaced. A zoom lens barrel characterized by having a zooming configuration. (2) The above-mentioned zooming cam barrel connected to the movable barrel by a bayonet configuration is provided at the front position, and another cam barrel similarly connected to this movable barrel is provided at the rear position to support the focusing optical system. A zoom lens barrel characterized in that an interlocking member is interlocked with another cam barrel described above.