Abstract: A folding knife is provided with a power storage device that can be charged and recharged by a charge component that wirelessly receives power from a remote source. In some embodiments, the folding knife can have a device that consumes energy such as a light, a camera, a microphone, an audio speaker, etc. The power storage device and the charge component can be positioned in a scale of the handle where the substantially planar shapes of the scale, the power storage device, and the charge component are oriented in a common direction. In some embodiments, the cavities, recesses, and channels in the first scale that house these components and linking wires are strategically positioned to leave a reinforcing area that provides strength and stiffness to the handle. Various features are also described herein that improve safety of the charging system.

Abstract: A folding knife includes a movable piece that is attached to a blade and a handle so as to be relatively rotatable by a specific rotation angle with respect to the blade, and to rotate with respect to the handle together with the blade outside the specific rotation angle; a notch or a recess formed at a position near a rotating shaft portion on the back side of the blade; a protrusion that is formed at a position on the movable piece and in a shape corresponding to the notch or recess of the blade; and a rotation mechanism including the rotating shaft portion that allows the movable piece to rotate with respect to the blade only within a specific rotation angle.

Abstract: A folding knife is provided with an opening mechanism having a traction surface to aid users in rotating the blade from the closed position to the open position and to assist with opening the folding knife. More specifically, the traction surface is located on an outer surface of the tang of the blade and extends outwardly from the handle when the blade is in the closed position.