| 摘要 |
PROBLEM TO BE SOLVED: To fix an interphone slave set to the inner part of a box having the opened front and to mount the box to an outer face of a building or the like. SOLUTION: A front side 5 of the box 1 is open and a projection 4 prevents intrusion of water flowing from its upper part to the inside. The slave set 2 is placed to the inner part of the box around of which is surrounded, and the box 1 is mounted on a building 3 or the like. Or the box whose front is open and the slave set section placed to the inner part of the box are formed integrally and the box is mounted on a building similarly to above, a defect caused conventionally is avoided and a speech with a master set can be made. Thus, damage is effectively prevented such as improper insulation due to water, rust development, a too tight moving part to move (switch section or the like) and improper contact due to corrosion because a slave set and a slave set section are not exposed and not directly in contact with rain and snow.
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