Writing instrument with calculator

摘要: A writing instrument internally houses a miniature electronic calculator which includes key input section comprising single is subjected to rotational or translational movement select one of plurality switches. When the depressed against bias applied thereto while in position it has selected switches, switch controlled thereby an associated information into arithmetic unit calculator. The case marked with indicia designate positions for convenience selecting informations. comprises insulating substrate on array stationary contacts are formed along direction key, flexible film disposed opposing relationship contacts, and movable contact deposited side faces so as extend key. depression causes localized portion bear thus forming switch.