A knife includes interchangeable blades that are secured within the handle using a locking mechanism having a lock pin disposed between the distal end of the lock bar and the blade. In addition to strengthening the lock, the lock pin also serves as a safety catch n the unlikely event of lock failure, resisting rotation of the blade into a position in which the user's fingers would be cut.

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.

The present disclosure provides a folding knife. The knife according to the present disclosure includes several components. Under a preferred disassembly operation, the knife can be disassembled into the following parts: a connection pin, a first frame member of a handle of the knife, a second frame member of a handle of the knife, a latch at the end of the handle, a back frame member between the first and second frame members of the handle, a pivot retainer on the second frame member, and a blade of the knife.

A switch lock apparatus includes a top plate; an insert; a spring; a lock plate; and a bottom plate. The top plate and the bottom plate are rotationally fixably attached. The spring separates a top surface of the lock plate and a bottom surface of the top insert. The insert, the spring, and the lock plate are rotationally fixably attached. The bottom plate includes a space for lodging a portion of the lock plate. The lock plate is substantially rotationally fixably attached when the portion is lodged in the space. The lock plate is rotationally movable with respect to the bottom plate when the portion is not lodged in the space. The insert is attached to a blade portion of a knife. At least one of the top plate and the bottom plate is attached to a handle portion of the knife.

A folding knife including a blade assembly; a first plate; a first member; a spacer connected to a first end of the first member; and a first button connected to the first member between the first end of the first member and an opposing second end of the first member; wherein the spacer is configured to be inserted into a slot of the blade assembly to lock the blade assembly into an open orientation with respect to the first plate. The first member is configured to be rotated with respect to the first plate by the first button to allow the blade assembly to be unlocked. The first plate has an arcuate slot; wherein the arcuate slot is located closer to a first end of the first plate than to a second end; and wherein the first button is located between the arcuate slot and the second end.

A folding knife includes a blade mounted for pivotal movement between an open position and a closed position. The knife includes a locking assembly having a cam mounted for pivotal movement between a raised position, in which the locking assembly is in an unlocked configuration allowing pivotal movement of the blade, and a lowered position, in which the locking assembly is in a locked configuration preventing pivotal movement of the blade. The knife includes a projection on the blade moveable between a collapsed position, allowing pivotal movement of the blade, and a raised position, preventing pivotal movement of the blade. The knife includes a bolt locking assembly for locking and unlocking the blade, and a cap over the bolt locking assembly preventing the bolt locking assembly from unlocking the blade.

A knife includes interchangeable blades that are secured within the handle using a locking mechanism having a lock pin disposed between the distal end of the lock bar and the blade. In addition to strengthening the lock, the lock pin also serves as a safety catch n the unlikely event of lock failure, resisting rotation of the blade into a position in which the user's fingers would be cut.

A folding knife includes a handle and a blade. The handle includes a first side member, a second side member, a connector, and a locking member. The first and second side members are pivotably coupled to the connector such that the first and second side members are pivotable relative to one another. The blade includes a pivot member extending laterally from a surface of the blade, and the pivot member is disposed between the first and second side members. The locking member of the handle is movable between an unlocked position and a locked position. In the unlocked position, the first and second side members of the handle are pivotable relative to one another and can disengage the pivot member of the blade. In the locked position, the first and second side members are restrained from movement relative to one another and engage the pivot member of the blade.

A knife having a double-sided ball slide knife blade locking mechanism includes a blade pivotally attached to a handle, the blade having a pair of large circular indentations formed on opposite lateral sides of the blade, and also having a pair of small circular indentations formed on opposite lateral sides of the blade. The knife handle has handle scales attached to opposite sides of the knife blade. Each of a pair of detent elements are positioned intermediate the handle scales and knife blade on both sides of the blade, and positioned such that the detent elements will mate with the indentations. Each of a pair of spring-loaded sliding detent release shafts are mounted within the handle scales and have a tapered interior side configured to wedge between the detent element and a detent housing cover to temporarily lock the detent elements in place within the indentations.

A switchblade includes a casing that defines a cavity. A blade having a cutting edge has a retracted position in which the cutting edge is inside the cavity and a deployed position in which the cutting edge is outside the cavity. A spring is operably connected to the blade to bias the blade to the deployed position. An actuator is releasably engaged with the blade, and operation of the actuator allows the blade to move between the retracted position and the deployed position. A safety lever that extends through at least a portion of the casing lever has a lock position that prevents operation of the actuator and an unlock position that permits operation of the actuator.