| 摘要 |
<P>PROBLEM TO BE SOLVED: To increase the strength of a hinge section without degrading the flexibility of the hinge section in a structure where a connection section and the hinge section are arranged at a lower position than top faces of a first cover section and a second cover section. <P>SOLUTION: A battery cover 1 includes: a first cover section 2; a second cover section 10; and a connection section 20 disposed between the first cover section 2 and the second cover section 10 at a lower position than top faces of the first cover section 2 and the second cover section 10. The connection section 20 has a joined section 21 fixed to the second cover section 10 and a hinged section 30 thinner than the joined section 21. In the hinged section 30, hinge ends 31 on both sides are formed into a thicker wall than a hinged center portion 32. In each of the hinge ends 31, the side end face 31a has a curved face moderately inclining moderately toward the second cover section 10 side from the first cover section 2 side, and the top face 31b is thinnest in the center and has an arc-shaped curved face inclining upward to have a gradually thicker wall as moving nearer to both support ends from the center. <P>COPYRIGHT: (C)2012,JPO&INPIT |
