KEY INPUT DEVICE FOR HIGH FREQUENCY HEATING DEVICE

PURPOSE:To simplify a system and to reduce a cost by a method wherein electrodes are mounted to the upper and lower end surfaces of a first conduction sheet, electrodes are mounted to the left and right end surfaces of a second conduction sheet, and a comb-shaped electrode pattern insulated from a resistor is mounted to the end part of the first conduction sheet. CONSTITUTION:First and second conduction sheets 36 and 37 on which resistors 35a and 35b are uniformly applied are laminated together in a manner that the conduction surface sides are positioned facing each other. Insulation dot spacer groups 38 are laterally and longitudinally arranged at intervals of a given distance between the two conduction sheets, aluminum sheet 39 are arranged on the first and second conduction sheets 36 and 37. Further, a menu printed sheet 32 is arranged. Comb-shaped electrodes 41 and 42 formed by removing a part of the resistance 35a is formed in the lower end part of the first conduction sheet 36 and an area positioned facing a 'start' key 40 of a menu printed sheet 32. A resistor 43 applied on the second conduction sheet 37 is positioned above the comb-shaped electrodes 41 and 42, and with the 'start' key 40 pressed by a finger, the resistor 43 is brought into contact with the comb-shaped electrodes 41 and 42, and short-circuit is caused to occur by low resistance of the resistor 43 between the comb-shaped electrodes 41 and 42.