A double spring folding knife includes a handle having a curvilinear groove on an interior surface, and a knife blade. The knife blade has a locking pin that extends away from a first side of the knife blade and is configured to slidingly engage the curvilinear groove. A bow spring is fixed to the handle and is orientated to interact with the locking pin in order to exert a force on the locking pin during a portion of travel along the curvilinear groove. The knife also includes a coil spring having a first end fixed to the handle and a second end fixed to a second side of the knife blade, where the coil spring is configured to exert an opening force on the knife blade after the locking pin has traveled past the bow spring along the curvilinear groove.

A locking folding knife includes a handle and a blade pivotally connected to the handle. The blade has a cutting edge and a first position in which at least a portion of the cutting edge is located within the handle and a second position in which a majority of the cutting edge is outside of the handle. A pocket is defined in a first surface of the handle. A through-cut is in the pocket, wherein the through-cut terminates in the pocket at an endpoint. A lock is integral with the handle and extends from the endpoint of the through-cut, wherein the lock engages with a portion of the blade in the second position.

A knife may include a housing, a blade holder, and an actuator. The blade holder may be movably attached to the housing and configured to receive a blade at least partially within the blade holder. The blade holder may be configured to move relative to the housing between a closed position in which a cutting edge of the blade is positioned entirely within the housing and an open position in which the cutting edge is positioned at least partially outside of the housing. The actuator may be movably attached to the housing and configured to move the blade holder from the closed position toward the open position. The actuator may be configured to move relative to the housing between an extended position in which the actuator is positioned at least partially outside of the housing and a retracted position in which the actuator is positioned entirely within the housing.

A utility knife assembly includes a case having a slot in which two blades are received. A resilient plate is secured in the slot and includes two resilient fingers to push the blades out from the slot. A switch unit is connected to the case and selectively activates either one of the two blades to be pivoted out from the slot.

A folding knife has an elongated frame defining a major plane and having a pivot element at a pivot end and defining a pivot axis and the frame defining a blade receptacle, an elongated blade occupying the major plane having a tip end and a base end, a spine edge and a cutting edge, and opposed major faces, the base end connected to the pivot element, the blade being operable to pivot between a stowed position in which the blade is received in the blade receptacle and an extended position in which the tip end of the blade extends away from the frame, and the blade having a lock feature proximate the base end, a button lock element connected to the frame proximate the pivot element and operable to selectably engage the lock feature when the blade is in the extended position.

Disclosed is a manual tool capable of unfolding only one work accessory. The conventional manual tools may bring hidden risk to safety with more than two work accessories that may be unfolded simultaneously. According to the present invention, an associated accessory is arranged for a working state of a first work accessory and a second work accessory to transform from a folding state to an unfolding state; in the folding state where the first work accessory and the second work accessory are both folded, the associated accessory does not prevent any work accessory from unfolding; while in the unfolding state where one of the two work accessories is unfolded and the other one is folded, the associated accessory prevents the other one from unfolding, so as to ensure that only one work accessory can be unfolded during use, and if the unfolded work accessory is left unfolded, the other work accessory cannot be unfolded, thereby eliminating the safety risk caused by unfolding multiple work accessories at the same time.

A folding knife configured for rapid assembly and disassembly includes a blade and first and second handle portions. The first handle portion includes two engaging posts on the inner side, and the second handle portion has two engaging holes in the inner side. The engaging posts can extend respectively into the engaging holes so that the two handle portions form a complete handle. An engaging plate is provided in the handle and connected to a switch in the second handle portion. When the switch is pushed in one direction, the engaging plate engages with the engaging posts to prevent the engaging posts from disengaging from the engaging holes. Once the switch is pushed in the opposite direction, the engaging plate disengages from the engaging posts to allow the engaging posts to disengage from the engaging holes. The switch thus enables rapid assembly and disassembly of the folding knife.

A folding knife including a handle, a pivot axis, and a blade having a cutting edge. The blade is pivotably coupled to the handle such that the blade is pivotable relative to the handle about the pivot axis between a retracted position and an extended position. The cutting edge is exposed in the extended position and a portion of the blade is received within the handle in the retracted position. The folding knife further includes a bearing assembly for facilitating movement of the blade between the retracted position and the extended position. The bearing assembly includes a first bearing recessed within the blade and a second bearing recessed within the handle.

A folding knife includes a lockbar for automatically locking a knife blade in an opened position relative to a handle. A puck attached to the lockbar is configured to engage a tang of the blade to lock the blade in an open position relative to the handle.

The present invention is to provide a folding knife with a locking function comprising a handle, a blade pivotally connected to an end of handle through a pivot pin, a poke member and a first elastic component; wherein blade includes a locking pin protruded adjacent to pivot pin; e poke member includes a poke part at an end thereof and exposed out of handle. The other end of poke member is pivotally connected between pivot pin and the other end of handle. Poke member includes a locking slot recessed adjacent to a middle section thereof and facing pivot pin. first elastic component includes an end abutted against the middle section, and the other end fixed between poke member and the other end of handle, for applying an elastic force on poke member, so as to ensure locking pin to be engaged into locking slot, when blade is received inside handle.