| 摘要 |
In a lens barrel in which the light exposure controlling unit for controlling the amount of light is integrated, an electromagnetic unit is employed as a drive source for driving the shutter blades, and the direction of the movement of the plunger in the electromagnetic unit is switched by the shutter lever, and the shutter blades are opened and closed. The coil and the plunger constructing the electromagnetic unit are disposed in parallel with the optical axis O, and their arrangement contributes to reduce the space required for the electromagnetic unit, whereby enabling downsizing of the light exposure controlling unit and the lens barrel.
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