Abstract: The present invention discloses a folding knife, which includes a knife handle having a slot; a blade pivotally coupled to the knife handle and turnable into or out from the knife handle; a resilient device fixed to the knife handle and extended to a position proximate to the pivotal connecting position, such that when the blade is stored completely into the knife handle, the resilient device produces a torque to turn the blade into the knife handle, and when the blade is turned to a predetermined angle out of the knife handle, the resilient device produces a torque to turn the blade out from the knife handle; and a turning device, pivotally coupled to the knife handle and having a protruding pillar passed through the slot for securing or releasing the blade as required.

Abstract: A folding knife includes a handle, a blade, a resilient element and a poking element. The blade can be turned into or out from the handle. The resilient element has an end fixed to the handle and another end extended to a position of connecting the handle and the blade. If the blade is stored in the handle, the resilient element produces a torque to turn the blade into the handle. When a force is applied to turn the blade out from the handle, the resilient element produces a torque to pop the blade out from the handle automatically. The poking element is provided for turning the blade. When the blade is in the handle, the poking element presses against the blade, such that if a user pokes an end of the poking element, another end of the poking element turns the blade out from the handle.

Abstract: The invention discloses a folding knife having a knife handle and a blade. A pivotal shaft is at an end of the knife handle; a limit slot is inside the knife handle; and a latch element is in the limit slot. The blade is pivotally coupled to the knife handle through the pivotal shaft. The blade includes a protruding pillar corresponding to a latch portion. When the blade is stored into the knife handle, the protruding pillar is fixed between the limit slot and the latch element, and the blade will not pivot out of the knife handle due to shakes or vibrations. If a predetermined force is applied to rotate the blade towards the knife handle, the protruding pillar will rotate in conformity with the blade and push the latch element, so that the protruding pillar is released and rotated with the blade in the limit slot.

Abstract: A folding knife has a handle and a blade. The blade is pivotally coupled to the handle. The handle includes a latch element, a resilient element and a turning element. An end of the resilient element is fixed into the handle. The latch element is pivotally coupled into the handle. An end of the latch element is extended to an end of the blade. Another end of the latch element presses against another end of the resilient element. The resilient element pushes the latch element to turn the blade out from the handle or store the blade completely into the handle. The turning element is pivotally coupled into the handle, such that when a force is exerted to push the latch element towards the resilient element to release the blade, the blade can be movably turned out from the handle or stored into the handle.

Abstract: The present invention discloses a folding knife, which comprises a blade pivotally coupled to an end of a knife handle for pivoting out of the knife handle or being received into the knife handle, a resilient bar with an end fixed to another end of the knife handle and another end extended to the blade proximate to the pivotal connecting position, and a push switch installed proximate to the pivotal connecting position with an end extended to a surface of the knife handle and another end passed through the knife handle and against the blade, such that when the push switch is pushed to drive the blade to turn to a predetermined angle, the resilient bar produces a torque to turn the blade out from the knife handle automatically, so that a user simply needs to push the push switch for the control of turning the blade out from the knife handle.

Abstract: A foldable knife includes a knife handle having a first end pivotally connected with a pivot and a blade having a first end pivotally connected to the pivot. An elastic member is pivotably received in the knife handle, and has a first end extended to a portion of the blade adjacent to the pivot, and a second end extended away from the pivot and toward a second end of the knife handle. A slide member is movably received in the knife handle. When the blade is completely received in the knife handle and the slide member is moved to a position engaged with the second end of the elastic member, the first end of the elastic member is tightly engaged with a portion of the blade adjacent to the pivot for elastically releasing the blade into the knife handle.

Abstract: The present invention is to provide a folding knife comprising a flat member within a handle thereof, the flat member comprising a latch having an open end proximate a pivot pin of a blade on the handle, the latch including a projection on its one surface, the projection being adapted to be pressed by a sliding block so as to allow the latch to exert a downward force onto the blade wherein a sliding movement of the slide is adapted to cause the sliding block to compress a resilient member toward a rear end of the handle for disengaging the sliding block from the projection and for pivoting the blade either out of or into the groove.

Abstract: The present invention is to provide a foldable knife operable with one single hand, which comprises a knife holder including a retaining space formed between a first plate and a second plate, a blade body having one end pivotally connected to one end of the knife holder and capable of being retained in the retaining space or rotated out of the retaining space, at least an actuating rod formed on one surface of the blade body; and an actuating portion formed on the first plate to cooperate with the actuating rod. When the knife body is retained in the retaining space, the actuating rod is aligned to the adjacent actuating portion adapted to push the actuating rod moving towards outside of the knife holder, thereby pushing the blade body out of the retaining space.

Abstract: The present invention is to provide a folding knife operable by one hand, comprising a handle and a blade. The blade comprises a point at one end along with the other end pivotably connected to one end of the handle and a latch pivotably connected to the other end, enabling the blade to be adapted to either lie within the handle by pivoting in one direction or pull out of the handle by pivoting in the other opposite direction and the latch to be adapted to lock with a detent of the handle for prohibiting the blade from pivoting when the blade is received in the handle in a closed position of the knife or the point is distal one end of the handle in an open position thereof.

Abstract: The present invention is to provide a folding knife comprising a flat member within a handle thereof, the flat member comprising a latch having an open end proximate a pivot pin of a blade on the handle, the latch including a projection on its one surface, the projection being adapted to be pressed by a sliding block so as to allow the latch to exert a downward force onto the blade wherein a sliding movement of the slide is adapted to cause the sliding block to compress a resilient member toward a rear end of the handle for disengaging the sliding block from the projection and for pivoting the blade either out of or into the groove.