| 摘要 |
A safety knife comprises a handle, a main blade mounted on the handle with a pointed end part of the cutting edge of the blade projecting from the handle at an obtuse angle, and a guard mounted on the handle to shield the projecting portion of the blade. The guard comprises a further blade which is mounted on the handle in generally the same plane as the main blade and has a concavely curved cutting edge which extends around the projecting point of the main blade. The outer edge of the guard blade is unsharpened so that the guard blade protects and shields the point of the main blade as well as contributing to the cutting action of the knife.
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