JPH0311230U

JPH0311230U -

Info

Publication number: JPH0311230U
Application number: JP7180789U
Authority: JP
Priority date: 1989-06-20
Filing date: 1989-06-20
Publication date: 1991-02-04
Anticipated expiration: 2004-06-20
Also published as: JP2526847Y2

Description

[Brief explanation of drawings]

第１図は本考案を組込むのに適したシヤツター
の要部を示す概略的斜視図。第２図は本考案によ
りセツトレバーの被駆動突起腕のカム凹部に形成
された傾斜縁部を示す部分的説明図。第３図は第
２図の変形実施例の突起縁部を示す部分的説明図
。１……シヤツター開口、２……カメラの壁部、
３……垂直壁部、４……シヤツター先幕駆動レバ
ー、５，７……電磁石装置、６……シヤツター後
幕駆動レバー、９……セツトレバー、９ｅ……被
駆動突起腕、９ｆ……カム凹部、１２……モータ
ー、１７……減速ギヤ列、１８……制御ローラー
、１９……傾斜縁部、２０……突起縁部。 FIG. 1 is a schematic perspective view showing the main parts of a shutter suitable for incorporating the present invention. FIG. 2 is a partial explanatory view showing the inclined edge formed in the cam recess of the driven protrusion arm of the set lever according to the present invention. FIG. 3 is a partial explanatory view showing the protrusion edge of the modified embodiment of FIG. 2; 1...Shutter opening, 2...Camera wall,
3... Vertical wall portion, 4... Shutter front curtain drive lever, 5, 7... Electromagnetic device, 6... Shutter rear curtain drive lever, 9... Set lever, 9e... Driven protrusion arm, 9f... Cam Recessed portion, 12...Motor, 17...Reduction gear train, 18...Control roller, 19...Slope edge, 20...Protrusion edge.

Claims

[Scope of utility model registration request]

closing the front shutter curtain by the shutter leading curtain drive lever biased by the spring to the shutter trailing curtain open position and the shutter trailing curtain drive lever biased by the spring to the shutter trailing curtain closed position;
A set lever that is movable against the action of a spring so as to be operated to a set position for opening the shutter rear curtain, and an electromagnetic device that attracts and holds each of the drive levers, which have been operated to the set position, at the set position. The control roller support gear is rotated by normal rotation of a motor controlled by a control circuit, and the control roller is moved into contact with an arcuate cam recess formed in the set lever, thereby moving the set lever to the position where the setting is performed. Then, in response to a command from the control circuit for the shutter release, each of the electromagnetic devices is first energized to attract and hold these drive levers in the set position, and the motor is further rotated in the normal direction to rotate the control roller support gear. Return to the initial position, rotate and hold the shutter, deactivate the electromagnetic device of the shutter leading curtain drive lever to open the shutter leading curtain, and after a predetermined exposure time deactivate the electromagnetic device of the shutter trailing curtain driving lever to open the shutter. In a camera shutter setting mechanism that performs exposure by closing a trailing curtain, the rear half of the arcuate cam recess with which the control roller contacts and moves is provided with a slope or a shape that provides resistance to the contact movement of the control roller. A camera shutter setting mechanism characterized by forming a protruding edge.