Patent ID: 7365281
Filing Date: 2008-04-29
Classification: G06F,H01H,H04M

Abstract:
1. A waterproof/drainage structure for a casing having a plurality of pushbuttons on a surface of the casing, comprising: a cover member forming the surface and provided with a plurality of button holes; and a button unit having the plurality of pushbuttons and a sheet portion retaining the plurality of pushbuttons at predetermined positions, the sheet portion being arranged along a back surface of the cover member and having an outer peripheral portion held in close abut with the cover member, the pushbuttons being inserted in the button holes of the cover member, wherein the sheet portion is provided with a groove-like drainage channel having a channel portion that is opposed to a back surface of each of the plurality of pushbuttons and is larger than a surface area within a maximum outer periphery of the pushbuttons.