| 摘要 |
A folding knife has a handle with a body forming a pocket into which its blade is normally retracted, the pocket being bounded by two cheeks of the holder body traversed by respective contacts in line with a hole near an end of the blade. One cutout is occupied by a plunger which is rigidly connected with a detent, occupying the other cutout by a stem that is integral with either the plunger or the detent and traverses the hole of the blade to serve as its pivotal axle. A spring in the first cutout biases the interconnected plunger and detent into a locking position in which a projection on the detent engages in a notch of the blade to hold it in its retracted or its extended position; the biasing spring may bear directly on a confronting blade surface and coact with one of its notches to prevent a rapid switch into the extended position.
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