Patent ID: 8070147

Claim:
A clamping device comprising: a securing seat defining a first groove, a bottom wall of the first groove defines a through hole; a driving member movably mounted on the securing seat, the driving member comprising an actuator and a driving shaft, the actuator being capable of moving relative to the securing seat and actuating the driving shaft to move relative to the securing seat, the actuator received in the through hole; a first fixture comprising a first clamping member and a first connecting member connected to the first clamping member, the connecting member comprising a first moving portion supported by the securing seat; a second fixture comprising a second clamping member facing the first clamping member and a second connecting member connected to the second clamping member, the second connecting member comprising a second moving portion facing the first moving portion; a first securing pole and a second securing pole fixed on the securing seat and symmetrically positioned about the driving member; a first joining member and a second joining member respectively matched with the first securing pole and the second securing pole and being capable of rotating around thereto, two ends of the first joining member respectively connected to the driving member and the first moving portion, two ends of the second joining member respectively connected to the driving member and the second moving portion; and two third securing poles; wherein the driving shaft, the first joining member, the second joining member, the first moving portion and the second moving portion are received in the first groove, the first moving portion defines two first guiding holes, the first moving portion comprises two first washers, the first washers are received in the first guiding holes, the second moving portion defines two second guiding holes, the second moving portion comprises two second washers, the second washers are received in the second guiding holes, each of the third securing poles is respectively inserted through one of the first washers, one of the first guiding holes, a respective one of the second washers and a respective one of the second guiding holes to be secured to two side walls of the first groove.