Patent ID: 6139207
Filing Date: 2000-10-31
Classification: G06F,H01H

Abstract:
A keyboard apparatus comprising a key base, a plurality of key tops that are disposed on said key base in matrixed configuration and a plurality of pantograph mechanisms each being provided for each one of said key tops, respectively, so as to connect each of said key tops to said key base, respectively, wherein said pantograph mechanism comprises first and second pantograph units, first end portions of said first and second pantograph units being pivotally connected to said key top, while a second end portion of said first pantograph unit being pivotally connected to a first portion of said key base and a second end portion of said second pantograph unit being detachably connected to a second portion of said key base,wherein said second end portion of said second pantograph unit is configured so as to pivotally move with respect to a connected portion formed between said second end portion of said first pantograph unit and said first portion of said key base, as a center of axis,wherein said pivotal movement of said second end portion of said second pantograph unit is caused in response to a reciprocating motion of a reciprocating link in parallel with said key base, said reciprocating link being adjacently provided to said key base,wherein said second end portion of said second pantograph unit is connected to one end portion of a holder, the other end portion of said holder being connected to a portion of said reciprocating link, andwherein said holder is provided with a bending portion on a portion of said holder.