Patent ID: 6988425

Claim:
An actuator comprising: a frame; a driving source which is arranged inside or outside said frame; a driving force-transmitting mechanism which includes a driving pulley rotatably supported on one end of said frame, a driven pulley rotatably supported on the other end of said frame, and a belt member running over said driving pulley and said driven pulley; a slider to which said belt member is fastened and which reciprocates in an axial direction of said frame together with said belt member in accordance with rotary motion of said belt member; a guide mechanism which includes a plurality of balls rolling along first ball-rolling grooves formed on said frame and second ball-rolling grooves formed on said slider, and which guides said slider when said slider is displaced along said frame; and a belt stopper which is installed to a groove formed on said slider to fasten said belt member to said slider, wherein said belt stopper is installed detachably to said slider such that said belt stopper and fastening members of said belt stopper are visible and accessible from outside of said frame.