A folding knife locking structure which comprises a locking bridge, a button washer, a screw washer, a button, a spindle, a spindle screw, a locking spring and a button spring is disclosed. The locking bridge of the invention can be pushed by the locking spring and automatically inserted into a locking groove or a closing groove arranged on a cutting edge according to a rotation angle of the cutting edge, so as to automatically achieve a locking effect. A locking contact surface is arranged on the locking bridge and is divided into a flat section and an inclined section with different angles, thereby achieving double effects of wear compensation and locking insurance. The operation of manual safety is not needed. The invention has the advantages of control convenience and locking firmness. An operation gesture does not need a finger to appear on a return path of the cutting edge.

A knife with quickly adjustable elasticity comprises a blade, a pair of pull rod springs and two handle covers arranged opposite to each other, wherein a receiving cavity for receiving the blade is reserved between the handle covers, an end, opposite to a blade tip, of the blade is connected to the handle covers by means of a spindle, assembly and disassembly holes are formed in corresponding positions of the two handle covers, one end of an adjusting element is mounted in the assembly and disassembly holes by means of an articulated shaft, and the other end of the adjusting element is locked to the handle covers by means of a fastener. When the force of the pull rod is adjusted, it is unnecessary to disassemble all components of the knife.

A folding knife with a push-down button lever lock structure includes a blade, and the front and rear sides of the blade are installed with a front handle and a back handle through an installation mechanism. At the position between the front handle and the back handle close to a right side through a screw and a spring locking piece is connected and fixed with a bottom bone, and a left side of a spring locking is coupled with an unlocking piece. The front side of the spring locking piece corresponding to the side is equipped with a limit nail, and the spring locking piece is close to the front of the handle. A suction bead is installed on a top near the front of the handle, and at an end of a bottom bone.

A folding knife with a push button automatic open spring configuration to propel the pivoted knife blade outwardly from between the support handle frames. A bifurcated compound spring configuration has a transverse blade engagement portion and a pair of returning integral handle engagement arms against which the spring is compressed when in closed folded position within the handle. The bifurcated spring exerts opening force on the blade when the blade is released to a full open use position.

A hand-held tool (100) includes a handle (104), and a blade (102) pivotably coupled to the handle at a proximal end (105). The blade includes a plurality of apertures (116, 118, 120, 122). The hand-held tool further includes a locking member (438) is configured to detachably engage with one of the plurality of the apertures to retain the blade at an angular position relative to the handle. The locking member is provided on a bracket member coupled to the handle, the bracket member being configured to at least partially enclose the proximal end of the blade. The bracket member is spring biased such that the locking member engages with one of the plurality of the apertures to retain the blade at an angular position relative to the handle. Further, the bracket member is movable such that the locking member disengages from one of the plurality of the apertures to allow the blade to pivot relative to the handle.

A universal ferrule includes: a mounting end having a cylindrical portion for receiving an effector and defining a central longitudinal axis, and a coupling end opposite the mounting end. At the coupling end, a coupling annulus extending perpendicularly and multiple teeth, defining detents therebetween, are arranged around the coupling annulus. The coupling end has a lock hole for receiving a pin of a female ferrule. The coupling end includes a terminus opposite the mounting end, and the coupling annulus may be interrupted by a slot extending from an edge of the terminus to a center of the coupling annulus. The annulus is flush with the tops of the teeth and raised relative to the detents, thus defining a matingly corresponding arrangement for coupling with a hotstick adapter. Alternatively, the coupling end can be inserted into a female ferrule with a lock pin received in the lock hole.

A folding knife having a positioning mechanism includes a blade having a passage-allowing groove, a handle pivotally connected to the blade, an elastic bar fixable in the handle, an engaging portion mountable in the handle, and a positioning portion. When stored in the handle, the blade is applied by the elastic bar with a rotating force that pushes it along a direction out of the handle. The engaging portion keeps the blade stored in the handle from being rotated outward when the engaging portion's pressing unit is not pressed; and is disengaged from the passage-allowing groove's groove wall when the pressing unit is pressed, so that the blade can be pushed by the elastic bar and rotated out of the handle. When the blade is rotated into a working-unfolded state, the positioning portion can be extended into a positioning groove of the blade to prevent the blade from rebounding.

A folding knife includes a grip portion, a working portion, a translation mechanism and a first locating structure. The grip portion defines an accommodating hollow therein, and the working portion includes a blade and a mounting support. The mounting support is able to pivot about the grip portion to switch between an unfolded position and a folded position. When the mounting support is in the unfolded position, a free end of the mounting support is located in front of the grip portion. When the mounting support is in the folded position, the free end of the mounting support is located in the accommodating hollow. When the mounting support is in the folded position, the translation mechanism is able to move in a lengthwise direction of the grip portion, causing the blade to move relative to the grip portion between the extended and retracted positions. The first locating structure is able to locate the blade in the extended and retracted positions.

A folding knife includes a handle, a blade, and a locking assembly. The handle includes a keyhole and the blade includes a through-bore defining a configuration that is complimentary to a configuration of the keyhole. The blade is rotatable relative to the handle from a first, undeployed position to a second, deployed position in a clockwise direction and an opposite counterclockwise direction. The locking assembly includes a pivot receivable within each of the keyhole and the through-bore, a locking ring operably coupled to the pivot, a locking button slidably supported within, and selectively engageable with, each of the pivot and the locking ring, and a biasing element interposed between the locking button and the pivot to bias the locking button towards a first position where the blade is inhibited from rotating relative to the handle.