| 摘要 |
PURPOSE:To obtain an inexpensive thermal copying machine with a simple constitution, by using a simple mechanism such as a link mechanism to move a light source device, and also using an elastic member such as a spring and rubber as a driving device. CONSTITUTION:If a sector gear is rotated by a driving lever when a pressure plate is closed, a gear 25 rotates, a main shaft 24 rotates to wind a chain 29, and the spring 30 expands to charge driving force, locking the spring in the state. When the rotation of the main shaft 24 when the spring 30 of a mechanical driving device returns by being unlocked is reduced in speed by gears 45, 48, 49, 51, and 54 to stop the rotation of a gear 55 by a ratchet 56 as well as the constant-speed mechanism of the light source device, moving the light source device at a constant speed. At this time, a flywheel 59 operates similarly with the hair spring of a timepiece and the weight of the flywheel 59 is varied to vary the rotating speed of the main shaft 24. |
