Extensible knife with blade position adjustment - has handle with c=shape channel for receiving blade, with notches formed along channel longitudinal edge

摘要

The knife comprises a knife handle or grip having a channel for receiving slidably inside a blade holder. The latter has a blade secured to it so that the blade is withdrawn outwardly as it wears out. A series of notches are formed in the knife grip, while a V-like leaf spring is mounted on the blade holder, whereby the blade holder and hence the blade are held securely at predetermined indexed positions relative to the knife grip through engagement between the V-like leaf spring and the selected notch. A locking structure releasably locks the V-like spring member so that the latter is prevented from being accidently disengaged from the notch.