KEYBOARD PROVIDED WITH TRACKBALL COORDINATION INFORMATION INPUT DEVICE, AND PORTABLE COMPUTER DEVICE PROVIDED WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a keyboard provided with trackball coordinate information input device which is excellent in operability and can effectively utilize the key installment space of a keyboard. SOLUTION: This keyboard 21 is provided with a trackball 14a provided freely rotatably nearby the side edge part of a key installment side 21a of the keyboard and plural operation switches 14b and 14c adjacent to the side of an installing point of the trackball 14a on the key installment side 21a. Then, the plural operation switches 14b and 14c are provided so that they are in line in a direction of depth.