| 摘要 |
<p>A drive mechanism for a hole punch is disclosed. The mechanism comprises a frame and a lever comprising a first end and a second end. The lever is pivotally coupled to the frame at a pivot point disposed intermediate the first and second end thereof. The frame comprises a lever engaging portion for engaging with a frame engaging portion disposed at the second end of the lever, such that as the first end of lever is pivoted about the pivot point, the frame engaging portion is arranged to move along the lever engaging portion to cause the pivot point to move with respect to the frame.</p> |
