| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a switch mechanism with a simplified construction which can control actuation conditions of electric instruments dependently upon the presence of sunshine. SOLUTION: The present switch mechanism includes a solar cell 1 used as a sensor for detecting sunshine, and switch means (controller 2) which is switched by an output of the solar cell 1 for controlling actuation conditions of an electrical instrument (ventilating fan 3) driven by electric power supplied from a power supply (domestic power supply 4). Further, a switch mechanism is applied to an under-floor ventilating fan 3 in an under-floor ventilating system.</p> |
