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Keyboard type switch assembly having fixed and movable contacts disposed on foldable flexible printed circuit board

  • US 3,911,234 A
  • Filed: 06/25/1974
  • Issued: 10/07/1975
  • Est. Priority Date: 07/05/1973
  • Status: Expired due to Term
First Claim
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1. A flexible printed circuit matrix switch comprising a flexible printed circuit formed of a flexible insulating lamina having first and second spaced interconnectible contact portions on one surface thereof, the first portion comprising a contact zone and the second portion comprising an array of contact areas disposed in a grid, the lamina being folded about a spacer whereby the first and second contact portions are located on opposite sides of the spacer and are facing each other in opposed complementary relation, a plurality of apertures in said spacer disposed in a grid with the apertures being in alignment with the contact areas of said second contact portion, said first and second contact portions being movable into and out of engagement with each other through a selected one of said apertures by flexure of the flexible printed circuit.

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