| 摘要 |
<p>PROBLEM TO BE SOLVED: To accelerate the positioning of a stick at its neutral position unless a push detection switch can not be operated with the stick and to prevent misoperation by detecting the stick being pushed in by the push detection switch when the stick is pushed in. SOLUTION: When the stick 3 is at the neutral position, a guide block 8 allows it to move down and when the stick is not at the neutral position, the stick is inhibited from moving down. The guide block which inhibits the stick 3 from moving down unless it is at the neutral position and allows it to move down when at the neutral position is arranged below a universal support mechanism 4. Therefore, when the push detection switch 9 can not be operated with the stick 3, the stick 3 is inhibited from moving down even when energized downward, thereby making an operator recognize that the switch-ON operation is disabled.</p> |
