Fuel tank cap and method of manufacturing the same

摘要

A fuel tank cap which enables static electricity to be discharged quickly and stably when the user manually touches a fuel tank cap to open or close the cap. The fuel tank cap has a casing body and a cover member with four discharge projections for discharging static electricity to a filler neck of a fuel tank. The four discharge projections are arranged in a third radial direction that has an angle of 45 degrees with respect to both a first radial direction and a second radial direction. The first radial direction, in which a handle member of the cover member is arranged, gives the maximum contraction of the cover member, whereas the second radial direction gives the minimum contraction of the cover member. The four discharge projections are arranged on a circle about the center of the cover member to reduce the effect of resin contraction.