Patent ID: 7845697

Claim:
A vacuum suction device comprising: an inner cylindrical body having an outer circumferential surface, a first opening and a second opening, and a through hole defined therein, the first and second openings exposed at the outer circumferential surface, the through hole extending from the first opening to the second opening; an outer enclosure having a circumferential inner wall surface, and a circumferential outer wall surface and a cylindrical through hole surrounded by the circumferential inner wall surface, the outer enclosure having a first through opening, a second through opening and a third through opening defined therein, the first, second and third through openings extending from the circumferential inner wall surface to the circumferential outer wall surface, the inner cylindrical body being received in the through hole of the outer enclosure and being rotatable relative to the outer enclosure between a first position where the first opening of the inner cylindrical body is coupled to the first through opening of the outer enclosure and the second opening is coupled to the third through opening, and a second position where the first opening of the inner cylindrical body is coupled to the second through opening of the outer enclosure and the second opening is coupled to the first through opening; and a vacuum pump coupled to the third through opening of the outer enclosure; an ion generator coupled to the second through opening of the outer enclosure; and a vacuum picking member for picking a workpiece, the vacuum picking member being coupled to the first through opening of the outer enclosure.