| 摘要 |
PURPOSE:To bring a film into a press-contacting state automatically by locking a pressure plate assembly at distance from an aperture plate with the opening pin of a slide shaft, which slides back and forth reacting to the opening/closing operation of a lid body, only when the lid body is opened. CONSTITUTION:While the lid body 21 is closed, the slide shaft 36 is lowered with a button 38, so an opening lock dowel 41 moves to the position of disengagement from an opening holding part 46 and no external force is applied to the pressure plate assembly 15, so it is pressed against the aperture plate 12 with the force of a torsion spring 34. When the lid body 21 is opened, the slide shaft 36 is elevated and the grip 47 at the upper end of the pressure plate assembly 15 is gripped in this state and opened, so that the opening holding part 46 rotates a stopper plate 42 in the clockwise direction (a). When the opening holding part 46 moves beyond the lock dowel 41, the stopper plate 42 is returned with the force of the torsion spring 44 until it abuts on a control pin 45, and the lock surface 41a of the lock dowel 41 engages the opening holding part 46, so that the pressure plate assembly 15 is held at the opening position. |
