Patent ID: 7694394

Claim:
A button comprising: a button body; and a fastening member fitted to the button body via a cloth, the fastening member comprising a base and a shank extending from the base, the shank comprising a shank distal end having a relatively small diameter, a shank proximal portion having a diameter larger than that of the shank distal end, and a shank stepped portion disposed between the distal end and the proximal portion, wherein the button body has a shank receiving space for receiving the shank which has passed through the cloth, the shank receiving space comprising a shank receiving small diameter portion which receives the shank distal end and which has an axial length larger than that of the distal end, a shank receiving large diameter portion which receives at least a part of the shank proximal portion, and a shank receiving stepped portion between the small diameter portion and the large diameter portion, the shank receiving stepped portion having a stepped portion edge around a boundary with the small diameter portion, and wherein the shank distal end has a recess at a top of the shank distal end, and the recess defines a tip edge forming an angle less than 90 degrees in vertical section with respect to an outer peripheral surface of the shank distal end.