JPS5898617U

JPS5898617U - Camera electric zoom operation device

Info

Publication number: JPS5898617U
Application number: JP19617481U
Authority: JP
Inventors: 野沢　秀世; 俊郎原
Original assignee: 株式会社ニコン
Priority date: 1981-12-25
Filing date: 1981-12-25
Publication date: 1983-07-05

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の断面図、第２図は第１図実施
例の電気回路の説明図、第３図は第１図実施例のカム部
の説明図、第４図はカム面の異なる他の実施例を示す説
明図である。２・・・可逆モーター、６，１０．１１・・・減速歯車
機構、１０．１３・・・クラッチ装置、１６・・・ズー
ムレンズ、１７・・・手動ズーム環、１Ｂ・・・鏡筒歯
車、Ｌ、・・・固定レンズ、”２１　Ｌ３・・・移動レ
レズ、１９・・・スイッチ操作部材、２２・・・カム部
材、２２ａ。２２’ａ・・・カム面、２２ｂ、２２’　ｂ−・・谷部
、２３・・・従動子、２５・・・カムレバー、２９・・
・復帰ばね。Fig. 1 is a sectional view of the embodiment of the present invention, Fig. 2 is an explanatory diagram of the electric circuit of the embodiment of Fig. 1, Fig. 3 is an explanatory diagram of the cam part of the embodiment of Fig. 1, and Fig. 4 is a cam It is an explanatory view showing another example with a different surface. 2... Reversible motor, 6, 10.11... Reduction gear mechanism, 10.13... Clutch device, 16... Zoom lens, 17... Manual zoom ring, 1B... Lens barrel gear , L... Fixed lens, 21 L3... Movable lens, 19... Switch operation member, 22... Cam member, 22a. 22'a... Cam surface, 22b, 22' b- ...Tanibe, 23...Follower, 25...Cam lever, 29...
・Return spring.

Claims

[Scope of utility model registration request]

(1) In an electric zoom magnification device for a camera that transmits the rotation of a reversible motor to a lens moving mechanism of a zoom lens via a reduction gear mechanism to move a moving lens forward and backward in one direction of light to change the magnification of the zoom lens, the reversible A switch operating member that is movable in opposite directions from an intermediate point where the motor stops in order to control the motor rotation direction, and a cam that has a cam surface that slopes toward a central valley and that is interlocked with the switch operating member. and a cam lever having a follower that rolls on the cam surface and is biased by a return spring so that the follower presses the cam surface, and the cam lever is connected to both the switch operating member and the cam lever. An electric zoom operating device for a camera, characterized in that the reduction gear mechanism is provided with a clutch device that is configured to be movable from the cam lever and that operates in conjunction with the movement of the cam lever.

(2) Utility Model Registration In the zoom operating device according to claim 1, the cam lever 25 is configured to include the follower 2,
3 is fitted into the trough 22b of the cam surface, the clutch device is disengaged, and the switch operating member 19 is held at its midpoint via the cam member 22.1. An electric zoom operation device for a camera, characterized by comprising:

(3) Utility Model Registration Scope of Claims In the zoom operating device according to claim 1 or 2, the clutch device constitutes a part of the reduction gear mechanism and is a movable gear movable in the optical axis direction of the zoom lens. 10 and a compression spring 13 that biases the moving gear.
An electric zoom operating device for a camera, characterized in that the movable gear 10 is moved by the elasticity of the return spring 29, and the movable gear 10 is disengaged from the reduction gear mechanism.

(4) Utility Model Registration In the zoom operating device according to claim 3, the cam lever 25 is arranged so that the follower 23
The moving direction of the movable gear 10, which is formed as a swinging lever with a large lever ratio that increases the amount of displacement of the cam lever, and the moving direction of the switch operating member 19, which is linked to the cam member 22, are mutually different from each other. An electric zoom operation device for a camera, characterized in that it is configured to be at a right angle.