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公开(公告)号：US10111497B2
公开(公告)日：2018-10-30
申请号：US15555988
申请日：2015-06-23
申请人： YKK Corporation
发明人： Daisuke Hayashi , Noboru Shimizu , Takuto Ogushi , Akio Kobayashi
摘要： A button back which makes it possible to form the front surface of a button to be a circular shape; a shell cap hard to be rotated; and an umbrella part hard to be deformed. The button back is made of metal, including a cylindrical part and an umbrella part extending radially outward from one axial end of the cylindrical part. The umbrella part includes a first bending part which extends radially outward from the one axial end of the cylindrical part and then bends on the opposite side of the cylindrical part. An outer periphery, including a radially outer end, of the first bending part has a polygonal shape including at least three corners and sides which extend between two circumferentially adjacent corners. The umbrella part includes flat plates extending radially outward from the radially outer end, corresponding to the sides, of the first bending part.
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公开(公告)号：US20180055151A1
公开(公告)日：2018-03-01
申请号：US15555988
申请日：2015-06-23
申请人： YKK Corporation
发明人： Daisuke Hayashi , Noboru Shimizu , Takuto Ogushi , Akio Kobayashi
摘要： A button back which makes it possible to form the front surface of a button to be a circular shape; a shell cap hard to be rotated; and an umbrella part hard to be deformed. The button back is made of metal, including a cylindrical part and an umbrella part extending radially outward from one axial end of the cylindrical part. The umbrella part includes a first bending part which extends radially outward from the one axial end of the cylindrical part and then bends on the opposite side of the cylindrical part. An outer periphery, including a radially outer end, of the first bending part has a polygonal shape including at least three corners and sides which extend between two circumferentially adjacent corners. The umbrella part includes flat plates extending radially outward from the radially outer end, corresponding to the sides, of the first bending part.
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