Patent ID: 7386940

Claim:
A pair of hairdressing scissors and a positioning device thereof comprising: a first blade; a second blade pivotally connected to the first blade; at least a connecting structure arranged on at least one of the first and second blades, a front surface and a rear surface of the connecting structure being formed a recess and a protrusion, respectively, the connecting structure is defined a through hole and a stop portion formed at a front end of the through hole, the front end of the through hole connected to the recess, between the recess and the pair of hairdressing scissors is formed a retaining wall; and at least a positioning device disposed in the through hole and including a retaining member, an elastic member and a fixing member, the retaining member and the elastic member are sequentially placed in the through hole, and then the fixing member is inserted in the through hole, the elastic member is biased between the fixing member and the retaining member in such a manner that the retaining member partially protrudes out of the front end of the through hole and is pressed against the stop portion; when coupling two pairs of hairdressing scissors together, the protrusion of a pair of hairdressing scissors is engaged in the recess of another pair of hairdressing scissors, the protrusion moves toward and member completely and a top end of the protrusion stops against the retaining wall, the retaining member will partially project out of the front end of the through hole and stop against a lower end of the protrusion, so that the plural pairs of hairdressing scissors are positioned firmly.