Patent ID: 7526839

Claim:
In a button structure comprising an inner button, an outer button and a piece of clothing article arranged between said inner button and said outer button, the improvement wherein said outer button comprises a pillar element and a zinc casting body, said pillar element having a first end provided with an expanding disk, said expanding disk being provided with a plurality of through holes, said zinc casting body having a first side provided with a smooth plane and a second side provided with a recession, said recession being provided with a plurality of engaging posts, each of said engaging posts being provided with a positioning step, said through holes of said pillar elements being engaged with engaging posts of said zinc casting body thereby causing said pillar element to be positioned on said positioning step of said engaging posts which extend out of said through holes of said expanding disk and are mortised to lock to a top end of said engaging posts to form blunt heads to accomplish a firm combination, said piece of clothing article being arranged between said outer button and said inner button, said hollow cylinder being inserted through said clothing article and said inner button and an outer end of said hollow cylinder being riveted on an outer side of said inner button.