| 摘要 |
<p>On at least either one of an inside of an opening edge of a cover (2) and an outside of an opening edge of a frame (3), an inclined portion (95) is formed, and on the other of the inside of the opening edge of the cover (2) and the outside of the opening edge of the frame (3), an inclination receiving portion (96) is formed. In such a way, in an event where external force is applied to the inclined portion (95) from an outside, the inclination receiving portion (96) slides on the inclined portion (95), and positionally shifts or falls off the cover (2).</p> |
