| 摘要 |
The invention is directed to a clutch mechanism for a barrier operator, the barrier operator comprising a motor, a barrier drive for engaging with a barrier such that 5 rotation of the barrier drive moves the barrier, the clutch mechanism being configured to transfer drive from the motor to the barrier drive, the clutch mechanism comprising a rotatable member driven for rotation by the motor, at least one engagement member movable between an engaged position and a disengaged position, wherein in the engaged position the at least one engagement member is in engagement with the barrier 10 drive, and in the disengaged position the at least one engagement member is out of engagement with the barrier drive, wherein when the at least one engagement member is in the engagement position and engaged with the rotatable member, the operation of the motor causes rotation of the rotatable member and rotation of the barrier drive, and wherein when the at least one engagement member is in the disengaged position, 15 operation of the motor causes rotation of the rotatable member without causing rotation of the barrier drive, whereby manual operation of the barrier is permitted when the at least one engagement member is in the disengaged position. |
