JPH0248932U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the photographing lens barrier opening/closing device according to the present invention when the barrier is closed, FIG. 2 is a front view of the embodiment, and FIG. 3 is a side view of the main parts. Figure 4 is a perspective view of the same embodiment when the barrier is open, Figure 5 is a front view, and Figure 6 is a front view.
The figure is a side view of the main part. DESCRIPTION OF SYMBOLS 1... Lens barrel cover, 2... Taking lens barrel, 3... Focus drive ring, 4... Tooth surface, 4a... Focusing area, 4b
...Barrier closed drive range, 5...Motor, 6...Output gear,
7... Intermediate gear, 8... Drive pin, 9... Support plate, 9a
...Opening, 10...Decorative board, 11...Barrier ring, 1
2, 14, 23, 24... Pin, 13... Tension spring, 15... Driven pin, 16... Drive pin, 20... Barrier, 20a... Arm portion, 21... Support shaft, 22... Spring,
25...Stotsupapin.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A lens barrier that is movable by a predetermined distance between a position that covers the front surface of the photographic lens and a position that exposes it, a motor that serves as a focus drive source for the photographic lens, and the output of this motor. A focus ring that is rotationally driven by meshing with a gear and focuses the photographing lens, a barrier drive ring that is interlocked with the rotation of the focus ring, and a first engagement that is connected to the barrier drive ring. and the focus ring, which is connected to the lens barrier, engages with the first engagement part when the focus ring is driven outside a predetermined focusing range, and causes the lens barrier to face the front surface of the photographic lens. when the first
an opening/closing device for a photographing lens barrier, comprising: a second engaging portion that disengages from the second engaging portion to retract the lens barrier from the front surface of the photographing lens and expose the lens barrier. (2) In a camera having a photographic lens whose focal length is changed by movement of a variable power drive ring, a lens barrier that can be moved by a predetermined amount between a position covering the front surface of the photographic lens and a position exposing it; It is rotationally driven by meshing with the motor that serves as the focus drive source of the lens and the output gear of this motor.
A focus ring that focuses the photographing lens and is formed independently of the drive of the variable power drive ring, a barrier drive ring that is linked to the rotation of the focus ring, and a barrier drive ring that is connected to the barrier drive ring. A first engaging portion and a focus ring connected to the lens barrier engage with the first engaging portion when driven outside a predetermined focusing range to move the lens barrier to the photographing lens. When the lens barrier is driven within the predetermined range, the lens barrier is disengaged from the first engaging portion, and the lens barrier is retracted from the front surface of the photographing lens to expose it. An opening/closing device for a photographing lens barrier, comprising a second engaging portion. (3) The motor is configured to be rotationally driven in a direction to open the lens barrier in conjunction with the operation of the shutter release, and to be rotationally driven in the direction to close the lens barrier in conjunction with the closing operation of the shutter. The photographic lens barrier opening/closing device according to claim 1 or 2, characterized in that: