| 摘要 |
PROBLEM TO BE SOLVED: To provide a hand held operation machine capable of performing many operations only by a thumb while retaining the hand held operation machine by both hands of a worker. SOLUTION: The hand held operation machine is provided with an operation input means (5) at a lower part of a display picture (4); gripping parts (6) at left and right sides of the operation input means (5); and a cross cursor key (7) and a selection key (8) in a range that the thumbs of the left hand and the right hand of the worker reach when the left and right gripping parts (6) are gripped by the left hand and the right hand of the worker respectively. Since the operation can be performed while retaining the hand held operation machine by both hands, fatigue of the worker is less and since vibration of the hands is less, the display picture (4) is easily visually recognized. COPYRIGHT: (C)2006,JPO&NCIPI
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