LARGE-SIZED KEYBOARD OF STRUCTURE, ON WHICH WATER-PROOF FILM IS LAMINATED, COMPOSED OF UPPER CIRCUIT LAYING ELASTIC FILM HAVING ARRANGEMENT OF EACH OPERATION KEY ON SURFACE AND PRINTED UPPER CIRCUIT FOR ENERGIZATION ON REAR SURFACE, INSULATING SPACER FILM PROVIDING A PLURALITY OF SPACE PARTS FOR ENERGIZATION FOR SECURING CONTACT OF ELECTRODES FOR EACH PAIR OF CONTACTING ELECTRODES OF UPPER CIRCUIT AND LOWER CIRCUIT, LOWER CIRCUIT LAYING FILM ON WHOSE SURFACE LOWER CIRCUIT FOR ENERGIZATION IS PRINTED, CORE MATERIAL SUCH AS URETHANE FOAMED MATERIAL FIXING EACH FILM, AND IC CIRCUIT BOARD FOR CONTROLLING ELECTRIC SIGNAL BY ENERGIZATION AND TRANSMITTING TO COMPUTER BODY

摘要

PROBLEM TO BE SOLVED: To provide a keyboard for handicapped people such as aged or visually impaired people capable of secure operation even if any key is pressed, composed of large-sized operation keys with a waterproof property. SOLUTION: The keyboard is composed of: an elastic upper circuit laying film 3 having arrangement of each operation key on the surface and an upper circuit for energization printed thereon; a plurality of insulating spacer films 5 providing an energization space 6 to secure contact between each pair of contacting electrodes 4 and 7 of the upper circuit and a lower circuit; a lower circuit laying film 8 on whose surface a lower circuit is printed; a core material 10 made of urethan foamed material and fixing each film 3, 5 and 8; and an IC board 12 which controls electric signal by energization and transmits it to a computer body. All of their constituents are waterproofed with a body laminating film 11. COPYRIGHT: (C)2007,JPO&INPIT