| 摘要 |
PROBLEM TO BE SOLVED: To provide an opening and closing device that maintains an opening state and is made compact.SOLUTION: A rear support portion 34 of a lower unit 21 has a stay 41 fitted to a lid body portion 32 rotatably by a fixed shaft 42, a groove portion 45 is bored in a groove plate 44, and a moving shaft 43 fitted to the stay 41 is moved in the groove portion 45, so that necessary strength can be secured although the stay 41 is formed into a thin and long plate. Further, the rear support portion 34 has the groove portion 45 spread to the right and left with the groove plate 44 stood on an upper surface of a main body portion 31, and the moving shaft 43 is moved along the groove portion 45, so that the stay 41 can be rotated while moved always above the upper surface of the main body portion 31. Therefore, the lower unit 21 need not secure a space where the stay 41 escapes on a rear side face of the main body portion 31 and other components can be arranged, so that the size is made smaller than before. |
