초록 ▼

A zoom lens for a camera having a between-the-lens shutter includes a motor for moving the lens along an optical axis in forward and rearward directions. A switch is operable by an operator to control operation of the motor for moving the lens from an initial position on the axis to a final stationa

A zoom lens for a camera having a between-the-lens shutter includes a motor for moving the lens along an optical axis in forward and rearward directions. A switch is operable by an operator to control operation of the motor for moving the lens from an initial position on the axis to a final stationary position that establishes the focal length of the lens. Control apparatus is responsive to the setting of the switch for operating the motor such that movement of the lens from its initial position to its final position always ends after the lens travels to its final position in a predetermined direction.

대표청구항 ▼

[ What is claimed:] [1.] A lens shutter camera including a lens drive system, said lens drive system comprising:(a) at least one lens, said at least one lens being mounted in a support member positionable in at least two different focal length positions;(b) a reversible motor mechanically coupled to

[ What is claimed:] [1.] A lens shutter camera including a lens drive system, said lens drive system comprising:(a) at least one lens, said at least one lens being mounted in a support member positionable in at least two different focal length positions;(b) a reversible motor mechanically coupled to said at least one lens, said reversible motor being operable to move the at least one lens along a fixed optical axis, in forward and rearward directions, into at least said two different focal length positions;(c) at least one switch, operable by an operator, said at least one switch identifying the direction of movement of said at least one lens towards one of said two different focal length positions; and(d) a control system which is responsive to said at least one switch, said control system being adapted to operate said motor such that movement of the at least one lens from an initial position, determined by the position of the at least one lens when the operator begins to operate the at least one switch, to a final position determined by the at least one switch, always ends after the at least one lens travels to its final position in a predetermined direction which is independent of the direction identified by the at least one switch, wherein said at least two positions comprises a retracted lens position at which a photographing operation cannot take place.