Patent ID: 7631856

Claim:
A fixing device for fixing a workpiece defining a hole, comprising: a fixing shaft configured to be inserted into the hole of the workpiece, the fixing shaft defining a groove therein along an axial direction and extending to a surface thereof; a sliding bar mounted to the fixing shaft and being movably in the groove of the fixing shaft along the axial direction; and a sliding block being T-shaped and comprising a horizontal piece and a vertical piece perpendicularly extending form the horizontal piece, wherein the vertical piece is mounted to the fixing shaft and movable in the groove of the fixing shaft; wherein when the sliding bar moves forward along the axial direction, the sliding block is moved toward the sliding bar along the radial direction, when the sliding bar moves backward along the axial direction, the sliding block is driven to move away from the sliding bar along the radial direction, to urge against a wall bounding the hole of the workpiece via the horizontal piece to fix the workpiece.