Abstract: Cam mechanism with a flat or planar locking member and a cam member also having a flat or planar shape. The cam mechanism is operable as a pop-up mechanism. The cam member moves substantially in a first plane and the lock member is urged or driven substantially in the first plane by the cam member when the cam member moves from a first to a second position corresponding to extended and retracted positions, respectively, of a pop-up device. When the cam member reaches a predetermined position, the movement of the cam member is restricted by the locking member and the restriction of the movement of the cam member is released by moving the locking member in a direction perpendicular to the first plane. A spring energizes the lock in a member towards a direction in which the movement of the cam member is restricted.

Abstract: A lever member integrated with a barrier member is rotatably and tiltably supported about a pin which is equivalent to a rotary shaft of a gear member, and a pin secured to the gear member is loosely attached to the lever member. The movement of the tiltable barrier member is regulated by guide rails in contact with the reverse of the barrier member and guide rails formed at the reverse side of a front cover in such a way as to contact with the obverse of the barrier member. A lens peripheral part has a spherical surface whose center is on a lens optical axis. Each guide rail is formed along the spherical surface. A driving force of a motor is transmitted to the gear member to rotate and move the barrier member on the spherical surface to thereby withdraw the barrier member into a space (open position) beside the taking lens and behind the closed position.

Abstract: Cam mechanism with a flat or planar locking member and a cam member also having a flat or planar shape. The cam mechanism is operable as a pop-up mechanism. The cam member moves substantially in a first plane and the lock member is urged or driven substantially in the first plane by the cam member when the cam member moves from a first to a second position corresponding to extended and retracted positions, respectively, of a pop-up device. When the cam member reaches a predetermined position, the movement of the cam member is restricted by the locking member and the restriction of the movement of the cam member is released by moving the locking member in a direction perpendicular to the first plane. A spring energizes the lock in a member towards a direction in which the movement of the cam member is restricted.