| 摘要 |
PURPOSE:To assure the plate fixing even when friction force is not enough between the elastic member and the drum by a method wherein specified projecting parts are furnished to the elastic member and the plate of an electronic calculator key board as well as the movement are simultaneously fixing with elasticity to the clock drum. CONSTITUTION:Several projecting parts 13b are furnished to the elastic member 13 and the tip of this elastic member is formed into a thick senment 13c. Using the elastic force of this projecting part 13b as a required interference force, the movement 14 is inserted and fixing to the drum 11 from the lower direction. Then, the upward movement of member 13 is obstructed by the thick segment 13c. As a result, the plate 12 of the calculator key board is clamped with elasticity to the drum 11 by means of the member 13 and even when the friction force between the member 13 and the drum is not enough, the plate 12 is surely fixing to the drum 11. And further, the member 13 is shaped to cover the lower side of the board 12 and at this area, hollows, which are the space required for operating of key buttons 15, are formed. |
