Lid opening and closing mechanism

A container unit (27) of an electronic camera is composed of a loading lid (35) and a slot forming surface (32) in which slots (33a, 33b) are formed. The loading lid is rotatably and slidably attached to a shaft support member (39), which is disposed on the slot forming surface, via a lid attachment shaft (38). The loading lid is provided with a claw (40). A torsion spring (42) is secured to the lid attachment shaft. The slot forming surface is provided with a frame (41) and a block-shaped protrusion (43). The torsion spring engages with the protrusion to click and lock the loading lid at a lock position where the claw engages with the frame. Upon sliding the loading lid to a lock release position where the claw is disengaged from the frame, the loading lid is automatically rotated to an open position owing to the torsion spring.