| 摘要 |
<p>A mosquito net frame (1) equipped with an alarm device, constituted by first and second lateral posts (3, 4) and by an upper supporting beam (5) inside which the mosquito net (6) can roll up, the alarm device (14) being contained within the lateral posts (3, 4) and comprising one or more emitter elements (15) which emit infrared optical beams, one or more receiver elements (16) which receive infrared optical beams, and a unit for supplying power and controlling the emitter and receiver elements.</p> |
