FOLDING KNIFE WITH CONTROLLABLE FOLDING AND UNFOLDING MECHANISM
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United States of America Patent
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app pub date -
Feb 15, 2017
filing date -
Feb 15, 2016
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Abstract
A folding knife may include a blade, a handle and a bearing located within the handle. In one embodiment, the bearing may include a first donut-shaped ring unit disposed adjacent to a blade through hole on one side of the blade and a second ring unit disposed adjacent to the blade through hole on the other side of the blade. A plurality of protruding units facing the blade are disposed on an outer surface of the first ring unit and second ring unit. The blade has a plurality of positioning protrusions surrounding the blade through hole on both sides of the blade corresponding to the protruding units, and the movement and position of the blade can be determined by relative positions between the positioning protrusions and the protruding units. Thus, the movement of the blade can be easily controlled and managed by the force exerted by the user.
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