Punching device

A punching device for cutting a workpiece to form a cutout portion, comprising:

• a base including a die part that has a top wall defining at least one die edge and adapted to support the cutout portion thereon;
• an abutting member connected to said base;
• a spring-biased punch supported on said base, movable relative to said die part and said abutting member between upper and lower positions, and having at least one blade edge, said blade edge being disposed above said die edge when said punch is disposed at the upper position, and being disposed below said die edge when said punch is disposed at the lower position, said blade edge being slidable toward said die edge for cutting the workpiece;
• and
• an ejecting unit supported on said base and including a non-compressible ejecting element disposed above and adjacent to said top wall of said die part, said punch being movable relative to said ejecting unit at least during movement of said punch from a middle position between the upper and lower positions, where said blade edge is substantially flush with said die edge, to the lower position, said ejecting unit abutting against said abutting member at least when said punch is disposed at the upper position so as to permit said ejecting element to eject the cutout portion of the workpiece, which is undesirably raised by said punch upon restoration of said punch from the lower position to the upper position from said punch,
• wherein said punch includes a head wall formed with at least one through-hole, said blade edge being disposed below and connected to said head wall, said ejecting unit further including an upper holder that is disposed above said head wall, said ejecting element being disposed below said head wall, said ejecting unit further including an interconnecting member extending through said through-hole in said head wall to interconnect said upper holder and said ejecting element,
• wherein said upper holder is secured to said base in a snap-fitting manner so as to permit movement of said punch relative to said ejecting unit during movement of said punch between the upper and lower positions,
• said punching device further comprising an upper housing disposed over and covering said ejecting unit and pivoted to said base so as to be rotatable relative to said base between first and second angular positions, said upper housing being formed with a middle recess defined by a recess-defining wall, said recess-defining wall being formed with at least one pressing projection protruding into said middle recess, said upper holder having an upper plate disposed over said head wall and formed with at least one cutout, said pressing projection being disposed above said upper plate when said upper housing is disposed at the first angular position and extending through said cutout to press against said head wall of said punch when said upper housing is disposed at the second angular position so as to drive movement of said punch from the upper position to the lower position.