Folding knife with safety for blade
AssigneeChia Yi Ent. Co., Ltd.
InventorShun-Fu Chen
Life of this patent
Estimating the term…
Abstract
A folding knife with a safety for blade is provided. When a blade of the folding knife is in an extended position for use, a slip switch of the safety for blade could be moved to a safety lock position to depress a lock member for a lower rod portion of the latter to engage into a first locking hole on the blade, so that the blade would not turn back into a handle of the folding knife even when a blade lock of the knife is unexpectedly separated from the blade. And, when the slip switch is moved to the safety lock position when the blade is in a folded position in the handle, the lower rod portion of the lock member would engage into a second locking hole on the blade to prevent the blade from unexpectedly turning out of the handle.
Claims18
A folding knife with safety for blade, comprising:
- a folding knife that includes a handle composed of a first and a second handle cover, a blade located between said first and said second handle covers, a blade lock located between said blade and an inner side of said second handle cover, a back-up plate located between said blade and an inner side of said first handle cover, and a back-up block located between said back-up plate and said blade lock;
- a pivot pin being extended through pin holes provided on said first handle cover, said second handle cover, said back-up plate and said blade lock, such that said blade is pivotally turnable about said pivot pin between a folded position, in which said blade is received in a space defined between said first and said second handle covers to one side of said back-up block, and an extended position, in which said blade is ready for use;
- said blade lock including a leaf spring portion having a normally upward inclined free end, said free end of said leaf spring pressing against a rear end surface of said blade when said blade is in said extended position and thereby locking said blade in said extended position;
- and a downward force applied on said free end of said leaf spring being able to separate said leaf spring from said rear end surface of said blade and thereby allowing said blade to be pivotally turned into said folded position;
- and
- a safety for blade being provided on said first handle cover and said back-up plate near said pivot pin at a predetermined position, said safety for blade mainly including a slip switch that can be operated with one finger, an elongated push block connected to a lower side of said slip switch to move along with said slip switch and having a bevel surface provided at a front end of said push block, and a lock member having a lower rod portion and an upper expanded head portion that has a beveled outer periphery;
- said slip switch being movable between a safety lock position, in which said bevel surface of said push block gets into contact with said beveled outer periphery of said head portion of said lock member to push and depress said lock member for said lower rod portion thereof to extend into at least one locking hole provided on one side of said blade facing said first handle cover to prevent said blade from being pivotally turned, and a safety unlock position, in which said push block disengages from said lock member for said lower rod portion of said lock member to move out of said at least one locking hole on said blade and thereby allows said blade to be pivotally turned.
Dependencies are inferred from the claim text.