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BLADE PUSHING DEVICE OF CUTTING KNIVES

  • US 20040111895A1
  • Filed: 12/17/2002
  • Published: 06/17/2004
  • Est. Priority Date: 12/17/2002
  • Status: Active Grant
First Claim
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1. A cutting knife comprising:

  • a holder having a slot defined in a side thereof and a plurality of recesses defined in one of two sides defining the slot;

    a base member slidably received in the slot and having a plate extending from a front end thereof, a boss extending from a side of the plate and a blade received in the slot and engaged with the boss, a wall extending from a side of the base member and an opening defined through the wall, a rod extending from an inside of the wall and a first end of a spring mounted to the rod, two stops extending from an edge of the wall;

    a spring member having a protrusion engaged with the opening in the wall and a second end of the spring contacting a reverse side of the protrusion of the spring member, the protrusion of the spring member engaged with one of the recesses of the slot of the holder, two end portions extending from a main portion of the spring member and contacting against two insides of the wall, and an operation member movably mounted to an outside of the wall and a convex portion extending from an inside of the operation member, two ends of the convex portion being movable between the two stops on the wall, a wedge-shaped notch defined in a side of the operation member and the protrusion of the spring member engaged with the wedge-shaped notch.

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