Patent ID: 8511195

Claim:
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 hollow outer shell pipe forming an outer shell for the spindle guide section, a rotary shaft provided within a hollow of the outer shell pipe, which hollow extends to opposite ends of the outer shell pipe, for transmitting rotation of a tool rotating drive source, provided within the drive unit housing, to the spindle, a guide pipe provided within the hollow and having a guide hole so as to extend to opposite ends thereof, and one or a plurality of attitude altering members reciprocally movably inserted within the guide pipe for altering the attitude of the distal end member; in which one or a plurality of attitude altering members 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 or each attitude altering member is provided within the drive unit housing; and in which the hollow has a round hole portion at a center and a grooved portion depressed radially outwardly from the round hole portion, and the rotary shaft is arranged within the round hole portion whereas the guide pipe is arranged within the grooved portion.