Workpiece holding-down structure for blind cutting machine

A blind cutting machine and blind holding-down structure to hold down a blind to be cut by a cutter unit of the blind cutting machine, the blind holding-down structure comprising:

• a workpiece feeder arranged to receive a blind to be cut, said workpiece feeder having a front side abutted against the cutter unit of the blind cutting machine, and a rear side;
• a clamp bar unit having a front end, a rear end, and a pivot hole formed at said front end, a positioning mechanism being mounted on said clamp bar unit;
• and
• a mounting base mounted into said pivot hole of said clamp bar unit by a pivot bolt for connection with said workpiece feeder and said clamp bar unit to enable pivoting movement of said clamp bar unit, said mounting base having positioning holes;
• wherein the mounting base has a plurality of said positioning holes equiangularly spaced around a screw hole, and said clamp bar unit has a clamping bar having said pivot hole defined therein and a threaded locating hole defined therein close to said pivot hole;
• and
• wherein said positioning mechanism comprises a locating rod having a threaded rod body threaded into said threaded locating hole and a tip axially extended downwardly and extended from said threaded rod body, a spring member sleeved onto the tip of said locating rod and stopped at a bottom side of said threaded rod body, and a steel ball mounted on a bottom end of said spring member remote from said locating rod and adapted to selectively engage one of said positioning holes.