Patent ID: 8454717

Claim:
A foldable dust collector, comprising: a supporting portion, comprising a first rack and a second rack, each one of the first rack and the second rack having a bottom end, the bottom ends being adapted for resting on the ground, so that the supporting portion is able to stand on the ground, a first distance being defined between the bottom ends, the first rack being movable between a first position and a second position with respect to the second rack, so that a length of the first distance is changeable; a case, being disposed on the supporting portion, a longitudinal direction being defined by the case, the case being pivotable between a third position and a fourth position, the longitudinal direction being horizontal when the case is located at the third position, the longitudinal direction being vertical when the case is located at the fourth position, an inlet, an outlet and a gas passage being defined by the case, the gas passage communicating with the inlet and the outlet; an air pump, firmly disposed on the case, the air pump being used for drawing air from the inlet to the outlet wherein the second rack comprises a protruding portion, the protruding portion extends away from the first rack and extends slantly downwardly from a portion of the second rack which is located away from the bottom end of the second rack by a distance, the supporting portion is able to stand on the ground with the first rack and the second rack where a distal end of the protruding portion is rested on the ground when the first rack is located at the second position; wherein the supporting portion comprises a third rack, the third rack is pivotably disposed on a top end of the second rack about a second axis, the case is firmly disposed on the third rack, the case swings between the third position and the fourth position when the third rack pivots about the second axis; wherein the supporting portion comprises a connecting portion, an end of the connecting portion is pivotably disposed on a top end of the first rack, another end of the connecting portion is pivotably disposed on the third rack, an end portion of the connecting portion abuts against and overlaps on a first side of the first rack axially when the first rack is located at the first position, an body portion extending axially from the end portion of the connecting portion abuts against and overlaps on a second side which is opposite to the first side of the first rack axially when the first rack is located at the second position.