Blade locking device for e.g. folding knife, has spring housed in heel of blade and including arc of circle between two bosses which exert constant pressure on stop pin along opening or closing of blade

摘要

The device has a blade (1) articulated around a rotating axle (3) and housed in a slot that is formed in a handle (2). A spring (5) is housed in a heel of the blade and includes two bosses (6, 7) which position and maintain the blade in closed and open positions, respectively. The spring includes an arc of circle between the bosses which exert constant pressure on a stop pin (4) along opening or closing of the blade.