Patent ID: 6956180

Claim:
A watertight key unit for an electronic device, the electronic device defining an inner space therein and having a key-mounting wall that is formed with a key-inserting hole defined by a hole-defining wall and in spatial communication with the inner space, a printed circuit board disposed in the inner space, and a micro stick switch coupled electrically to the printed circuit board, said watertight key unit comprising: a multifunctional key adapted to be mounted on the key-mounting wall and to extend through the key-inserting hole in the key-mounting wall to connect with the micro stick switch, and having a peripheral wall that is adapted to extend through the key-inserting hole and that has a lower end adapted to be received in the inner space in the electronic device; and an elastic sealing part extending from said lower end of said peripheral wall of said multifunctional key, having a peripheral wall that surrounds said peripheral wall of said multifunctional key, and cooperating with said peripheral wall of said multifunctional key to define a spacing groove therebetween, said peripheral wall of said sealing part being adapted to be surrounded by and to abut elastically and sealingly against the hole-defining wall of the key-inserting hole.