A folding knife with a locking mechanism is provided. The folding knife includes a locking spring that interfaces with a recess in the blade to bias the blade from being pivoted out of the handle. A button interfaces with the locking spring to actuate the locking spring interfacing with the blade.

A folding knife comprises a blade 1 which has a pin 9 and is pivotally fastened to a locking plate 2 having an aperture for a pivot bushing. In a first variant, the folding knife comprises a pivot bushing 3 with a flange 4. In a second variant, the knife has a pivot bushing 17 with a flange 18, and, on the opposite side of the blade 1, there is a clamping bushing 19 with a flange 20, which interacts with the pivot bushing 17 by means of a tight fit. A tightening screw 7 is screwed into the pivot bushing 3 or 17. Mounted on both sides of the blade 1, on the pivot bushing 3 or 17, are washers 5 and 6 made of an anti-friction elastically deformable material having a compressive elastic modulus of not less than 800 MPa. The locking plate 2 and a cover plate 8 are fastened by the insertion of fastening screws 12 into corresponding apertures 13. A backspacer 11 is mounted in the gap between the plates 2 and 8. A liner 10 is mounted in the lower portion of the locking plate 2. The technical result is simpler assembly, an increased lifespan as a result of more efficient compensation of lateral and torsional forces on the blade, and repairability.

A locking foldable knife comprises a locking assembly that reliably locks a blade in an extended position for use. The locking assembly utilizes the surface area of a shaped peripheral edge at a second end of a blade, together with, confirming structures of a locking bar, and one or more stops to reliably lock a blade in an extended position. A locking assembly also locks a blade in a folded position in one or more embodiments of the locking foldable knife.

A power-assisted folding knife, including: a blade holder; a blade arranged in the blade holder; a handle rotatably connected to the blade holder; a locking mechanism for locking the blade holder in an unfolded position and/or a folded position; the power-assisted folding knife further includes a power-assisting mechanism connected to the blade holder and the handle, for providing assisting power when unfolding a power-assisted folding knife. The power-assisted folding knife uses an assisting mechanism for providing assisting power when unfolding a folding knife, so as to facilitate easier unfolding of the folding knife and to allow single hand operation; the blade holder can be locked in an unfolded position and/or a folded position to ensure safe use of the power-assisted folding knife.

A folding knife with a locking mechanism is provided. The folding knife includes a locking spring that interfaces with a recess in the blade to bias the blade from being pivoted out of the handle. A button interfaces with the locking spring to actuate the locking spring interfacing with the blade.

The present invention provides a labyrinth foldable knife, which comprises a knife handle and a knife body, wherein a labyrinth groove is provided in the knife handle, a key device being arranged in the labyrinth groove; the key device consists of a flange, a key, a spring, a sleeve and a round head screw, the key passes through the flange, the spring and the sleeve; and by means of the connection between a threaded hole and a threaded section, the key device is buckled in the labyrinth groove and can move back and forth. The present invention may be used as a foldable knife, and may also be used as a labyrinth toy for exercising a hand, thereby realizing the multi-functionalization of the foldable knife.

A utility knife with a locknut includes a case, a blade holder, a blade, a movable pushbutton and a locking device. A blade extension/retraction opening is formed at a front end of the case and provided for the blade to extend or retract, and a movable chute is formed on a side of the case and provided for the movable pushbutton to move. The blade is correspondingly installed in the case by the blade holder, the blade controls its extension and retraction in the blade extension/retraction opening by the movable pushbutton. The locking device includes a locking rod and an adjusting device and uses the adjusting device to adjust the locking rod and lock the blade.

This disclosure describes systems, methods, and apparatus for a locking folding knife having a handle lock and a safety switch arranged around and rotatable around a pivot axis of the knife. In an engaged position the switch overlaps at least a portion of the handle lock and prevents it from moving into an unlocked position. A spring, such as a wire form spring, can be arranged within a pocket of the switch, and when the switch is moved between engaged and disengaged positions the spring can be compressed generating a rotational bias on the switch urging the switch toward either the engaged or disengaged position.

A folding knife has a blade pivotably mounted between a first handle scale and a second handle scale and attached to a first pivot post and a second pivot post. A locking mechanism is slidably mounted in the first handle scale and is spring biased into contact with the first pivot post. The locking mechanism is spring biased into contact with a first groove on the first pivot post when the blade is in a closed position thereby preventing the blade from pivoting to the open position, and the locking mechanism is spring biased into contact with a second groove on the first pivot post when the blade is in an open position thereby preventing the blade from pivoting to the closed position.

Various embodiments of a folding knife are disclosed. In one embodiment, the folding knife includes a handle, a blade including a tip and a tang with the tang having a tang block engagement element, an axle pivotably connecting the blade to the handle, and a lock mechanism. The lock mechanism includes a locking block constrained to move along a fore-aft linear axis, the locking block including a lower engagement surface, an upper engagement surface, and a rear surface. The lock mechanism also includes a biasing device carrier pivotably connected to the handle, a biasing device oriented between the biasing device carrier and the rear surface of the locking block and the biasing device configured to bias the locking block toward the blade tip when the blade is in an open orientation, and at least one handle block engagement element oriented above the upper engagement surface of the locking block.