| 摘要 |
A utility knife has a handle housing within which a slide bearing a knife is mounted for longitudinal displacement. Retraction means act on the knife to move it into a protected position. Turnably mounted within the housing (10) is a friction disk (22) which extends out of the handle housing (10) on the cutting-edge side of the knife blade (16). The axis of rotation (24) of said friction disk extends substantially perpendicularly to the plane of the knife blade. A driver member acts on the friction disk which advances the slide together with the knife blade into the cutting position thereof against the force of the retraction means.
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