| 摘要 |
PURPOSE:To protect the part which is relatively weak to external force by concentrating connection of unit members in the back cover part of a pocketbook type case. CONSTITUTION:A key input unit 2 consists of a pair of key sheets 2a, 2b, and key contact patterns are formed on the sheets. The sheet is made of, for instance, polyester film and aluminum foil is laminated on it. Wiring pattern is printed with carbon paste on it, and a key contact pattern is formed by etching the aluminum foil making the carbon paste an etching resist material. Wiring of the key sheets 2a, 2b is related to the key matrix, and wiring of the sheet 2b is connected to the sheet 2a at a connecting part 2c. A spacer made of polyester film is held between the sheets 2a, 2b, and the sheets 2a, 2b are unified by the action of an adhesive provided on the surface and back of the spacer. |
