| 摘要 |
PROBLEM TO BE SOLVED: To facilitate supply to an OEM of an interphone device and the maintenance. SOLUTION: This casing structure of an interphone which has a loudspeaker for telephonic communication, a microphone, and a button 24 for performing telephonic communication, and is composed of an upper casing 25 and a lower casing 26; and the button which readily becomes dirty during the operation of the interphone is attached to the upper casing, and also it can be covered freely of mounting and removal with a panel 27 which is to be removed off the upper casing for replacement.
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