| 摘要 |
PROBLEM TO BE SOLVED: To judge whether or not the apparatus is wetted without checking the inside of the apparatus from the outside of an apparatus by sticking a seal with color-change ink by water-infiltration to a necessary position of the apparatus. SOLUTION: On a back side of a case 2 of a portable phone 1, a notch part 6 is formed for a rechargeable battery. At an appropriate position in this notch part, a small hole 7 is drilled to lock into the inside of the case 2, and a sheet of transparent seal 3 is stuck from the outside of the case 2 so as to close the hole. And a seal 4 with color-change ink by water-infiltration is stuck so as to close the small hole 7 from the inside of the case 2. When the portable phone 1 is immersed in water and the inside of the apparatus is wetted, it can be checked from the outside of the apparatus through the transparent seal 3 and the small hole 7 that the ink seal 4 provided in the case 2 is infiltrated and changed in color. Thus, since infiltration of water can be judged from the outside of the apparatus, repairs can be prepared quickly and repair works are well-structured. |
