Patent ID: 6474997
Filing Date: 2002-11-05
Classification: G01R,H01R,H05K

Abstract:
A contact sheet used for connecting an electronic device having terminals to a board;said contact sheet being unitarily formed from two sheets of insulating elastic material bonded together via an adhesive sheet, each of the two sheets of said contact sheet having a plurality of through-holes and an equal or less number of contact springs on both sides of said adhesive sheet, and said adhesive sheet having through-holes with the same pattern as that of the two insulating sheets of said contact sheet;. said contact sheet further comprising: protruding contact springs in some or all of said through-holes provided in said contact sheet; each of said contact springs comprising a conductive material and being constituted by one or more cantilevers fixed onto said contact sheet by bonding or sandwiching at one end thereof; said each cantilever having a lower supporting portion and a terminal portion; said lower supporting portion comprising a planar portion formed adjacently to a portion fixed to said contact sheet; said terminal portion being formed by vertically or aslant bending the other end of said cantilever toward one of two openings of a through hole; and when said device is mounted, said terminal portion of each of said cantilevers is pushed and bent in a direction away from the portion of each cantilever that is fixed to the contact sheet, and at the same time, a boundary portion between the terminal portion and the lower supporting portion of at least one cantilever is pressed against said lower supporting portion or a boundary portion between the terminal portion and said lower supporting portion of a cantilever located on the other side of said adhesive sheet.