Patent ID: 7230195

Claim:
A button waterproofing structure for an electronic equipment in which at least one button is arranged in a corresponding button hole in a panel; a rib formed integrally with the panel and convexly provided on a rear surface of the panel surrounds the button hole; a light transmitting rubber sheet, which is a member physically separated from said button, seals a panel rear space surrounded by the rib and is held between a circuit board and the rib; a contact portion is provided on a rear surface of the rubber sheet so as to correspond to the button in such a manner as to be brought into contact with and separated from the circuit board by the elastic force of the rubber sheet; and a light emitting element is mounted on the circuit board so as to correspond to the button and is covered with the rubber sheet wherein a groove is formed in a front surface of the rubber sheet so as to correspond to the rib; and the rib engages with the groove by being tightly filled with the rib so that the panel rear space surrounded by the rib is sealed from an inner space of the equipment by the rubber sheet and the rib, and wherein said panel rear space has a drain hole which communicates with an outside of the equipment to drain water flowing through the button hole into the panel rear space.