| 摘要 |
PROBLEM TO BE SOLVED: To provide a stopper mechanism capable of retaining a movement restriction object that continuously displaces in a stepless manner to an arbitrary displacement position.SOLUTION: A press member 61 is provided to elastically grip a rotor 51 which rotates in association with displacement of a check shaft 21 with a stepped surface 43 inside a case 31. Friction forces between the press member 61 and the rotor 51, and between the rotor 51 and the stepped surface 43 serve to restrict rotation of the rotor 51, and accordingly, displacement of the check shaft 21. The press member 61 is provided with a rotary shaft 64 that penetrates through the rotor 51. The rotary shaft 64 is pressed up using displacement of a piezoelectric actuator 35 to move the press member 61 away from the rotor 51. This releases the grip state of the rotor 51 which is brought into the easily rotatable state, and further allows displacement of the check shaft 21 is also allowed. |
