Pressing structure for hole-punching unit
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United States of America Patent
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-
Jan 13, 2009
Grant Date -
Oct 18, 2007
app pub date -
Apr 13, 2006
filing date -
Apr 13, 2006
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A pressing structure for a hole-punching unit includes an axle, two wrenching pieces, a pole and two pressing pieces, wherein the axle is axially attached to a case of the hole-punching unit, with one end of the axle axially connecting to a control knob, each wrenching piece connecting to the axle near its end, the pressing piece having a spring coil disposed at its middle and pivotally connected to the pole, and the pressing piece having a pair of lapping portions extending from a first side of the spring coil, and a pair of suppressing portions extending from a second side of the spring coil, the lapping portions leaning against an upper edge of the wrenching piece for the control knob to drive the wrenching piece to move synchronously, so as to let the suppressing portions to press the hole-punching assembly and to fasten the hole-punching assembly.
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