| 摘要 |
A combined and integrated audible and visual signal. A signal case is constructed of a light transmissive material. The case includes an exposed front end cover with one or more sound transmitting apertures for transmitting of sound out of the case. The case also has a tubular wall extending transversely from the exposed end cover for extending through a hole in a mounting panel. A piezoelectric transducer is mounted within the tubular wall and includes a diaphragm that is spaced from the exposed cover a distance to form an audio enhancing cavity between the diaphragm and the cover. A circuit board is also mounted within the tubular wall and spaced from the diaphragm on the opposite side of the diaphragm from the cover. Light sources are mounted to a surface of the circuit board facing the diaphragm. The tubular wall in the region between the cover and a plane transverse to the tubular wall through the diaphragm is, in the axial direction, smoothly continuous with no angled bends. More preferably, the smoothly continuous wall that has no angled bends extends from the cover all the way to the circuit board and most preferably extends in the axial direction along a straight line.
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