Patent ID: 7926399

Claim:
A punching assembly, comprising: a die base, comprising at least one pin thereon; and a base adjusting device for adjusting a base level of the die base, comprising: a sleeve comprising a first end defining at least one first guiding hole, a second end defining at least one second guiding hole and a stage on an inner wall thereof, the die base partially received in the sleeve, the pin and the at least one second guiding hole cooperatively guiding the die base movable along the second guiding hole; an adjusting screw comprising a contact end and a mounted end received in the sleeve from the first end and connected to the die base via screws, and a latching portion configured between the contact end and the mounted end; a latching block disposed around the adjusting screw and adapted for engaging with the latching portion; a pull portion fixed to the latching block through the first guiding hole, and movable along the first guiding hole together with the latching block; an elastic element disposed around the adjusting screw with two ends respectively abutting against the latching block and the stage; a fixing ring fixed on the sleeve and disposed around the adjusting screw, and contiguous with the contact end in a clearance fit; and a stop member fixed on the adjusting screw and contiguous with the fixing ring for preventing axial movements of the adjusting screw relative to the sleeve.