| 摘要 |
PURPOSE:To stably fix a keyboard frame by allowing a screw head part to abut vertically at least at two angles on the abutting surface, in a boss part into which a screw is screwed. CONSTITUTION:A boss 35 for projecting vertically to the lower face of the front end part of the upper case 21 is inclined by a prescribed angle against the rear end of a keyboard frame 25 and a key. On the other hand, in the rear end part of the keyboard frame 25, a fixing use frame boss 41 is provided so as to be opposed to the boss 35. The boss 41 is formed as one body with the frame 25, and its vertical cross section is semi-circular toward the lower part. In this boss 41, a hole 43 whose diameter is larger than the diameter of a screw 37 is formed in the vertical direction. Accordingly, when the screw 37 is screwed into the boss 35 and the keyboard frame 25 is fixed to the upper case 21, a shaft of the screw 37 is fitted loosely into the hole 43, the bottom face of the flat head part of the screw abuts on the surface of the semi-spherical boss 41, and the screw 37 is screwed in vertically without abutting in one side and fixed firmly. |
