| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an alarm in which notification of change in external environment is easily visually recognized. <P>SOLUTION: An alarm includes: detection means that detects change in external environment; and notification means 20 that notifies the change in the external environment. The notification means 20 includes: a plurality of light emitting portions 21 that are arranged at intervals; a plurality of light radiation surfaces 22 that are formed on an outer surface of the notification means 20 and radiate light beams respectively projected from the light emitting portions 21 independently at intervals to the outside; spread portions 23 in which optical paths from the respective light emitting portions 21 to the light radiation surfaces 22 corresponding to the light emitting portions 21 are spread toward the light radiation surface 22 side; and a control unit 24 that controls a manner of light emission in the plurality of light emitting portions 21. <P>COPYRIGHT: (C)2013,JPO&INPIT |
