JPH0446428U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a plan view of a blade peripheral mechanism of a focal plane shutter according to an embodiment of the present invention, FIG. 2 is a plan view showing a shutter charging state of a shutter drive mechanism according to an embodiment of the present invention, and FIG. The figure is the second
4 is a plan view showing the state of the leading blade of the mechanism shown in the figure just before it starts running; FIG. 4 is a plan view showing the leading blade and trailing blade of the mechanism shown in FIGS. 2 and 3 engaged at the forward limit. 5 are plan views showing the mechanism shown in FIGS. 2 to 4 in a state where the leading blade is disengaged at the forward limit, and FIG. 6 is the mechanism shown in FIGS. 2 to 5. A plan view showing a state in which the rear blade is disengaged at the forward limit, FIG. 7 is an enlarged view of the drive mechanism on the leading blade side, FIG. 8 is an enlarged view of the drive mechanism on the rear blade side, and FIG.
The figure is a sectional view showing the mounting structure of the cam plate on the rear blade side. 1... Lead blade, 1a, 1b, 1c, 1d... Blade, 2... Trailing blade, 2a, 2b, 2c, 2d...
Blade, 3, 4, 5, 6... Connection lever, 7... Base plate, 7a... Aperture, 7b, 7c... Slot, 10... Bent part, 15... Leading blade drive lever, 15b... Hole part , 15c...Etsuji, 16...
...Reversing lever, 16a...Bending portion, 17...Torsion spring, 19...Rotating cam, 20...Cam plate, 2
0a...cam edge, 30...bending part, 35...leading blade drive lever, 35b...hole, 35c...edge, 36...reversing lever, 36a...bending part, 3
7...Torsion spring, 39...Rotating cam, 40...
Cam plate, 40a...cam edge, 40b...adjustment groove,
44... Set cam, 44a... Cam surface, 44b
...Cam surface, 62...shaft.

Claims (1)

[Claims for Utility Model Registration] 1. A blade that is swingably pivoted to the shutter base plate and is connected to a blade group consisting of a plurality of divided blades, and allows the blade group to run between an expanded state and a superimposed state. a drive lever; and a reversing lever that is swingably pivoted on a shaft provided on the drive lever at a position different from the pivot axis of the drive lever itself, and whose rotation range relative to the drive lever is regulated. , a biasing means having a fixed end provided outside the drive lever and an operating end engaged with a free end of the reversing lever to bias the reversing lever toward the forward movement limit of the driving lever; and the reversing lever. a rotary cam rotatably pivoted on the upper part between the swing shaft of the reversing lever and the engagement point of the biasing means; a set lever that is capable of moving the drive lever toward an initial position while engaging the rotary cam and retracting from the travel line of the rotary cam; A focal plane shutter characterized in that a cam edge is fixedly formed on the shutter base plate at a location for suppressing the swinging movement of the rotating cam about the swing axis of the drive lever. 2 Utility Model Registration In the focal plane shutter according to claim 1, the cam edge is formed on a cam plate fixed to the shutter base plate, and the attachment position of the cam plate to the shutter base plate is determined. A focal plane shutter characterized by being adjustable. 3 Utility Model Registration Claims In the focal plane shutter according to claim 1 or 2, the tangent of the running trajectory immediately before the rotating cam contacts the cam edge and the contact between the rotating cam and the cam edge A focal plane shutter characterized in that the tangent line of the cam edge immediately after intersects at an obtuse angle.