| 摘要 |
PCT No. PCT/SE96/00980 Sec. 371 Date Jan. 28, 1998 Sec. 102(e) Date Jan. 28, 1998 PCT Filed Aug. 1, 1996 PCT Pub. No. WO97/06546 PCT Pub. Date Feb. 20, 1997The invention relates to a matrix switching device (1) having a plurality of contact devices positioned in selected crosspoints between rows and columns, with each contact device including at least one movable contact element (2a). The device further includes a plurality of row-related, reciprocatingly movable first rods (3), a plurality of column-related reciprocatingly movable second rods (4, 4'), a plurality of electrically insulating balls (2h, 2g) of which each is allotted a selected crosspoint and is movable in response to movement of one or both of the rods (3, 4). Two mutually adjacent balls (2g, 2h) are provided at each selected crosspoint. A first ball (2g) has a larger diameter than a second ball (2h), and the first ball is so dimensioned that when moving it causes the movable contact element (2a) to move in one direction, and the second ball (2h) is so dimensioned as to have no effect on the movable contact irrespective of said movement. The second ball (2h) is adapted to impart movement to said first ball (2g). |
