公开(公告)号：JPH07334301A

公开(公告)日：1995-12-22

申请号：JP4944695

申请日：1995-03-09

Applicant: IBM

Inventor： MASHIYUU EFU KARI ,  JIEROOMU JIEI KUOMO ,  DONARUDO JIYOSEFU MIKARUSEN ,  JIYOSEFU DERA RUTORETSUJI ,  EDOUIN JIYOSEFU SERUKAA

IPC: G01L5/22 ,  G05G9/047 ,  G06F3/033

Abstract: PURPOSE: To improve a pressure sensor used for a keyboard by bending a base part having distortion sensing patterns so that it rises from the plane of a base, adhering it by making it lean on respective faces of the members so that it detects force given to the members and arranging it in a right-angle direction. CONSTITUTION: The patterns 102-108 which are formed by the distortion sensing transmission materials and which wind are formed on a plastic sheet 110 which is flexible to winding. Both ends of the distortion sensing patterns 102-108 are connected to lead terminal lines 112-126. Thus, the effect of circuit resistance depending on the patterns 102-108 is enlarged and the sensitivity of the distortion of the patterns is increased. One set constituted of the patterns 102 and 106 is orthogonal with the other set of the patterns 104 and 108. The rectangular part of a sheet 112 is divided by an X-form pattern and consequently the respective patterns 102-108 form different triangular pieces. The patterns 102-108 are triangles and they use a space at maximum as pieces.