Remote-controlled actuator

A remote controlled actuator which comprises a spindle guide section of an elongated configuration, a distal end member fitted to a tip end of the spindle guide section through a distal end member connecting unit for alteration in attitude, and a drive unit housing to which a base end of the spindle guide section is connected;

• in which the distal end member rotatably supports a spindle for holding a tool;
• in which the spindle guide section includes a rotary shaft for transmitting rotation of a tool rotating drive source, provided within the drive unit housing, to the spindle, a guide hole so as to extend to opposite ends thereof, and an attitude altering member reciprocally movably inserted within the guide hole for altering the attitude of the distal end member;
• in which the attitude altering member is, while a tip end thereof is held in contact with the distal end member, selectively advanced or retracted one at a time;
• in which an attitude altering drive source for selectively advancing or retracting the attitude altering member is provided within the drive unit housing;
• and
• further comprising an outer shell pipe defining an outer shell for the spindle guide section, a guide pipe positioned within the outer shell pipe having an inner diametric hole defining the guide hole, and a guide pipe restraining unit for restraining the guide pipe from moving within the outer shell pipe.