Patent ID: 7980164

Claim:
A multi-purpose hole punch, comprising: an equilateral triangular main body, a center of the equilateral triangular main body is pivotal configured with a pivot shaft that penetrates the main body, thereby enabling the pivot shaft to rotate in the center of the main body, the upper end of the pivot shaft protrudes the main body and a press plate is pivotal configured thereon, thereby enabling the press plate to rotate on the upper end of the pivot shaft, the lower end of the pivot shaft protrudes from the main body and is connected to a base plate, thereby forming a gap between the main body and the base plate which enables paper to be inserted ready for punching a hole therein; the three sides of the main body are respectively configured with a through hole, and a key-press, the upper end of which protrudes from the through hole, is located in each of the through holes; a punch located in each of the through holes beneath the key-press, and a knife edge is disposed at the bottom end of the punch, a spring is mounted on each of the punches, thereby enabling the key-press and the punch to use the restoring elasticity of the spring to return to their original positions after being pressed down; two transform plates symmetrically located on two sides in the gap, and the two transform plates are joined together and pivotal configured to the pivot shaft, thereby enabling the two transform plates to rotate in the gap; a corner of one of the transform plates is configured with an unfilled corner able to fixedly position a corner of paper, a corner of the other transform plate forms an unfilled corner able to fixedly position the edge of paper; whereby prior to punching a hole, the two transform plates are arbitrarily rotated, and the press plate is used to press down on the key-press and the punch above the unfilled corner on which the corner of paper is fixedly positioned, thereby punching a hole in the corner of the paper, and rotating the press plate to the position over the key-press and the punch above the unfilled corner on which the edge of paper is fixedly positioned and pressing down on the press plate enables punching a hole in the margin of the paper.