Hole punch

A hole punch, comprising:

• a main body, a lower portion of the main body is configured with a L-shaped base plate, a perpendicular connecting portion at a rear end of the base plate is connected to a rear end of the main body, thereby forming a gap between the main body and the base plate for placing sheets of paper therein ready for punching holes;
• a pivot shaft fitted to the main body, and a pressure plate is pivotal configured on the pivot shaft, a through hole is defined in the main body beneath the pressure plate;
• a press key located at an upper portion of the through hole, an upper end of the press key protrudes out from the through hole, a punching pin is disposed within the through hole beneath the press key, and a bottom end of the punching pin is fitted with knife edges, a spring is mounted on the punching pin, and the upper end of the spring abuts against the upper end of the punching pin, while the bottom end abuts against the inner bottom surface of the main body, thereby enabling the press key and the punching pin to use the restoring elasticity of the spring to return to their original positions after being pressed down;
• two adjusting plates symmetrically pivotal configured on two sides at an inner end of the gap, thereby enabling the two adjusting plates to be rotated within the gap;
• whereby prior to punching holes, the two adjusting plates can be rotated to the angle of the corner of paper, thereby enabling the corners of the paper to be placed into the gap for punching holes therein.