| 摘要 |
PROBLEM TO BE SOLVED: To enable a CRT cover to be readily attached to an upper housing and prevent the CRT cover from being easily removed from the upper housing. SOLUTION: There are provided a TV camera for imaging a visitor, a door phone slave set having a call button for calling and a slave set transmission/ reception unit for talking, a TV CRT which is connected to the door phone slave set to output the image taken by the TV camera of the door phone slave set, master set transmission/reception units 22, 23 for talking with the door phone slave set and an interphone master set 2 having operation buttons 24 for talking and operation buttons 25 for outputting the image. The interphone master set is provided with a CRT cover 3, which has a protrusion 30a on its side and covers the TV CRT and an upper housing 5 which has a hole 54, into which the protrusion is inserted and fixes the CRT cover.
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