Patent ID: 8157793

Claim:
A manipulator for medical use comprising an actuator unit containing a motor, and a working unit attachable to and detachable from said actuator unit, containing a connecting portion having a rotator connectable to a rotary shaft of said motor and a working portion coupled with said rotator, wherein said connecting portion has a locking plate, said locking plate being moved by a part of said actuator unit when said working unit is attached to or detached from said actuator unit, said locking plate has an engaging hole, with which a noncircular portion of said rotator is engaged, said noncircular portion is engaged with said engaging hole when said working unit is separated from said actuator unit, thereby preventing said rotator from rotating, and said noncircular portion is separated from said engaging hole when said working unit is connected to said actuator unit, thereby making said rotator rotatable.