Patent ID: 8899136

Claim:
A punching device, comprising: a base comprising a loading member and a supporting member mounted on the loading member; a linkage assembly comprising a pair of linkage members, a rotating member, a first connecting rod, a second connecting rod and a third connecting rod, wherein the rotating member is rotatably mounted on the supporting member, the pair of linkage members is movably mounted on the rotating member, a first end of the first connecting rod is rotatably connected to the pair of linkage members, a second end of the first connecting rod opposite to the first end thereof is rotatably connected to a middle portion of the second connecting rod, the second connecting rod is rotatably connected to the supporting member and the third connecting rod by opposite ends thereof; a carrying assembly rotatably connected to the third connecting rod and movably supported by the loading member; a punch mounted on an end of the rotating member; and a pressure arm rotatably connected to the supporting member and the pair of linkage members, wherein when an external pressing force is applied to the pressure arm to rotate, the pressure arm drives the carrying assembly to position a workpiece via the linkage assembly, and the rotating member rotates to drive the punch to punch the workpiece.