| 摘要 |
PROBLEM TO BE SOLVED: To provide a device of which a body can be easily disposed on an opening formed on a ceiling board. SOLUTION: The device includes the body disposed on the first opening formed on the ceiling board, and an anti-drop member disposed on a side face of the body to prevent drop of the body in a state that the body is disposed on the first opening. A second opening to be engaged with the anti-drop member is formed on the side face of the body. The anti-drop member has an upper section vertically extending along the side face of the body; a lower section vertically extended along the side face of the body at a lower part of the upper section; a spring section projecting from between the upper section and the lower section in the direction separating from the side face of the body; and an engagement section extending to at least an inner side of the body from an upper end of the upper section, to be engaged with a lower end or an upper end of the second opening. COPYRIGHT: (C)2011,JPO&INPIT
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