专利名称：Keyboard switch发明人：Seigo Hasunuma申请号：US09861000申请日：20010517
公开号：US20010046402A1公开日：20011129
摘要：In a keyboard switch including a pantograph mechanism comprising a U-shapedlink having a pair of stud shafts C rotatably and movably supported in bearing portions Bof a base and a link including a frame-like portion A and having a pair of stud shafts Drotatably supported in bearing portions C of the base , ribs F having tapered surfaces Gare provided along the peripheral surfaces of bosses D defining the center of rotation ofthe link 14 while holes E in the link for mating with the bosses D are formed with keywaysF. When a force tending to pull the keytop up further from it returned original position isapplied to the keytop, the tapered surfaces G and the angular edges of the keyways Fare forced into contact with each other. This urging force in turn urges the opposed legsB of the link to expand apart from each other in the directions indicated by the arrows ,whereby the link is prevented from dislodging from the base
申请人：HOSIDEN CORPORATION
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