| 摘要 |
<p>PROBLEM TO BE SOLVED: To resolve a problem that a holding feeling is hard to get from a conventional portable operation device, a finger or the like is easy to get tired in operating its enable switch or holding it for a long time, its housing is hard to always surely grasp and the enable switch is hard to operate. SOLUTION: This portable operation device 10 is provided with the housing 11, and plural operation switches 43a-43c mounted on the upper face 11a of the housing 11. A thumb support part 19 having a plate-like shape for hooking a left-hand thumb 61 is formed at a predetermined position of the housing 11.</p> |
