INPUT OPERATION DEVICE AND PORTABLE TELEPHONE AS WELL AS ELECTRONIC DEVICE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an input operation device having buttons which can easily be input even when obliquely pressed. SOLUTION: A space is formed between keys and the keys are made to easily deform by using a reversible plastic resin as a material of a key top having an integral structure. Only an intended key is enabled to be input by arranging a fulcrum between the keys and eliminating influence of deformation on the other keys when the intended key is pressed. COPYRIGHT: (C)2005,JPO&NCIPI