摘要 |
PURPOSE:To hold a cover open stably for a long period with less parts, by attaching a cover-side attachment member to a frame-side attachment member rotatably, fitting one end of a projecting support rod to the cover-side attachment member rotatably, and providing an elastic lock part to the frame-side attachment member corresponding to the projecting support rod. CONSTITUTION:The frame-side attachment member 21 has support plates 21b provided both side parts of one end of a rectangular plate 21a, and both support plates 21b are fitted with the cover-side attachment member 25 rotatably through a shaft 24. The cover-side attachment member 25 is provided with support plates 25b at both side parts of one end of a rectangular plate 25s and both support plates 25b are fitted rotatably on the shaft 24. A support plate 25c is fitted with one end of the projecting support rod 27 rotatably through a shaft 26. Then, while a platen cover 29 is opened, the tip R of the projecting rod 27 is locked by the bent part of a leaf spring 23, and consequently the platen cover 29 is held open. When the platen cover 29 in this state starts closing, the tip R of the projecting support rod 27 slides and falls off while pressing the free end of the leaf spring 23 to deform it elastically. |