JPH0227125U

JPH0227125U -

Info

Publication number: JPH0227125U
Application number: JP10417788U
Authority: JP
Priority date: 1988-08-05
Filing date: 1988-08-05
Publication date: 1990-02-22

Description

[Brief explanation of drawings]

第１図は本考案第１実施例の４枚羽根レンズバ
リアの閉塞時正面図、第２図は第１図におけるＡ
―Ａ線での断面図、第３図は第１実施例のレンズ
バリア開放時正面図、第４図、第５図は第１実施
例の要部の断面図、第６図は本考案第２実施例の
４枚羽根レンズバリアの閉塞時正面図、第７図は
第６図におけるＢ―Ｂ線での断面図、第８図は第
２実施例のレンズバリア開放時正面図、第９図は
要部の別実施例の切欠き正面図、第１０図はその
断面図である。１，１Ａ，１Ｂ；第１の羽根、２；第２の羽根
、３，４；操作部、５，５′；付勢手段、６；台
板、６ａ；鏡胴、ｆ；カム溝。 Fig. 1 is a front view of the four-blade lens barrier according to the first embodiment of the present invention when it is closed, and Fig. 2 is the A in Fig. 1.
-A cross-sectional view taken along line A; FIG. 3 is a front view of the first embodiment when the lens barrier is open; FIGS. 4 and 5 are cross-sectional views of essential parts of the first embodiment; and FIG. 7 is a sectional view taken along line BB in FIG. 6; FIG. 8 is a front view of the lens barrier of the second embodiment when it is open; FIG. The figure is a cutaway front view of another embodiment of the main part, and FIG. 10 is a sectional view thereof. 1, 1A, 1B; first blade; 2; second blade; 3, 4; operating section; 5, 5'; biasing means; 6; base plate; 6a; lens barrel; f; cam groove.

Claims

[Scope of utility model registration request]

A lens barrier for a camera lens includes a base plate fixed to the front surface of the lens barrel of the lens, a pair of first blades rotatably supported on the base plate and symmetrical to the optical axis; A pair of second blades are rotatably supported on the tip of the first blade, and also fit into the cam groove of the base plate and move, and a drive that can be operated from the outside and is used for opening operation. It has an operation section that transmits force to the first blade, and a biasing means that is installed at a position opposite to the operation section across the center of the lens barrel and that biases the first blade in a direction to close the lens barrier. A four-blade lens barrier with the following characteristics.