Patent ID: 9126343
Filing Date: 2015-09-08
Classification: B26B

Abstract:
1. A folding knife with a locking mechanism, comprising: a handle comprising a first plate element, the handle being provided with a pivot pin, the first plate element being formed with a pushing slide groove and a positioning slide groove, both said slide grooves being adjacent to the pivot pin; a blade having a portion which is distant from a tip of the blade and is pivotally connected by the pivot pin to a portion of the first plate element that is adjacent to an end thereof, the blade being formed with a curved groove which is adjacent to the pivot pin and extends along a circumferential direction defined by the pivot pin as the center, the curved groove having two terminal ends respectively extended with an opened-state locking groove and a folded-state locking groove, both said locking grooves extending away from the pivot pin; an elastic ring provided in the positioning slide groove, the elastic ring having a middle section curved inward to form a limiting portion such that a locking area and a releasing area are formed in the elastic ring and are adjacent to two ends of the elastic ring respectively; and an actuation element provided between the first plate element and the blade, the actuation element having a side which faces the first plate element and is protrudingly provided with a pushing member and a sliding member, the pushing member having a first end extending out of the first plate element through the pushing slide groove, the sliding member extending into the elastic ring, the actuation element having an opposite side protrudingly provided with a locking member, the locking member corresponding in position to and being able to extend into the curved groove of the blade, wherein once the blade is fully rotated out of the handle and thus enters an opened state, pushing the actuation element toward the tip of the blade causes the sliding member of the actuation element to pass through the limiting portion and enter the locking area such that the locking member is engaged in the opened-state locking groove and thereby locks the blade in the opened state; and once the blade is fully rotated into the handle and thus enters a folded state, pushing the actuation element away from the tip of the blade causes the sliding member of the actuation element to pass through the limiting portion and enter the locking area such that the locking member is engaged in the folded-state locking groove and thereby locks the blade in the folded state.