Patent ID: 8701701

Claim:
A float switch of a humidifier at least comprising: a main body provided with a water tank space reserved for accommodating said water tank, a base located at a bottom of said main body and provided with a water tank groove and a water basin, said water basin having a projected portion formed at a bottom; said water tank provided with a water outlet surrounded by plural ribs to engage with a float, a circumferential wall surrounding said water outlet and employed to combine with a protective hood of a float switch, a gap formed between said water outlet and said circumferential wall for containing said float of said float switch; and said float switch provided with a float possessing a combining groove for installing said water outlet of said water tank therein, a proper interval formed between a groove wall of said combining groove and an outer wall of said water outlet, said combining groove provided with an engaging hole to engage with an engaging circumference of a water stopper, said protective hood provided with a chamber for accommodating said float and combined with said circumferential wall surrounding said water outlet of said water tank, a pressing plate groove located in a bottom of said protective hood for installing a pressing plate, said pressing plate provided with a flat plate having two support axles combined with said pressing plate groove to support said pressing plate, said pressing plate further provided with an elastic piece having one end engaged with said pressing plate groove and another end attached with said flat plate of said pressing plate, said pressing plate further provided with a compressing end able to push up said float when said water tank is separated from said main body so that said water stopper of said float can seal said water outlet to prevent water from flowing outside.