Patent ID: 7568423

Claim:
A magnet-type rodless cylinder comprising: a cylinder tube ( 2 ) made of a nonmagnetic material; pistons ( 10 , 10 ) accommodated in a plurality of cylinder holes ( 3 , 3 ) formed in parallel in said cylinder tube ( 2 ) so as to move therein; inner magnets ( 12 , 12 ) arranged in said plurality of pistons; and a slide body ( 20 ) arranged on the outer side of said cylinder tube so as to move in the axial direction of the cylinder tube, and is magnetically coupled to the inner magnets of the pistons; wherein, said cylinder holes ( 3 , 3 ) are arranged close to each other so as to produce repulsive magnetic forces in the axial direction of the cylinder tube among the inner magnets ( 12 , 12 ) of the pistons so that the pistons ( 10 , 10 ) are held at positions deviated relative to each other in the axial direction of the cylinder tube.