Lock

A lock, adapted for being assembled on a door sheet, wherein the door sheet has a first surface, a second surface, a lateral margin, and an assembling hole passing through the first surface and the second surface, wherein said lock comprises:

• a latch assembly, adapted for being assembled on the lateral margin of the door sheet and extended into the assembling hole, comprising an assembly body and a latch linkably arranged with said assembly body, wherein said assembly body has a core lock hole formed at a position thereon corresponding to the assembling hole;
• a first locking mechanism, adapted for being assembled in the assembling hole from the first surface of the door sheet, comprising a veneer, adapted for being assembled on the first surface, an outside handle pivotally arranged on said veneer, a lock core assembled on said outside handle, and a shaft tube connected with said outside handle and axially aligned to said lock core, wherein said shaft tube has a guide slot axially arranged therein;
• a second locking mechanism, adapted for being assembled on the second surface of the door sheet, comprising an inside handle and an anti-lock knob arranged on said inside handle, wherein said inside handle has a connecting hole arranged therein;
• a linkage mechanism, which is arranged among said lock core, said anti-lock knob and said outside handle, and comprises an inner linkage member and an outer linkage member, wherein two ends of said inner linkage member are respectively connected with said lock core and said anti-lock knob, wherein said inner linkage member has two leaning portions protruded at one of said two ends thereof and close to said lock core, wherein a section of said outer linkage member is in a non-circular tubular shape, which is sleeved on an outer side of said inner linkage member and passes through said core lock hole, wherein said outer linkage member has a buckling portion arranged at an end thereof, wherein another end thereof is inserted into said connecting hole, wherein said buckling portion has two indentations respectively provided at two sides thereof;
• a clutch mechanism, sleeved on said inner linkage member, comprising a first clutch member, a second clutch member and two resilient members, wherein said first clutch member and said second clutch member are positioned in said shaft tube and respectively arranged on two sides of said leaning portion and have a first guiding key and a second guiding key respectively arranged on upper portions thereof to be coupled with said guide slot of said shaft tube, so as to allow said first clutch member and said second clutch member to axially move relatively to said shaft tube, wherein end faces of said first clutch member and said second clutch member facing each other respectively have a first bulging portion and a second bulging portion corresponding to each other in an up and down manner and a first recess portion and a second recess portion positioned in a middle portion thereof, wherein said second clutch member further has an engaging rib protruded on each of two sides thereof to correspondingly engage into said indentations of said buckling portion, wherein said first bulging portion and said second bulging portion lean with each other, wherein said first recess portion and said second recess portion jointly define an accommodation space for accommodating said leaning portions, wherein said resilient members are respectively arranged between said shaft tube and said first clutch member to push thereagainst and between said second clutch member and said buckling portion to push thereagainst, rendering said first clutch member and said second clutch member leaning against each other;
• and
• a rebounding mechanism, assembled between said veneer and said shaft tube, such that when said outside handle drives said shaft tube to rotate, said rebounding mechanism accumulates resilience, so that when the external force acting on said outside handle disappears, an accumulated resilience drives said shaft tube and said outside handle to restore, wherein in order for unlocking, said lock core or said anti-lock knob is utilized to drive said inner linkage member to rotate, so as to shift said leaning portion into a between of said first bulging portion and said second bulging portion to push said first bulging portion and said second bulging portion apart from each other, so that said engaging rib of said second clutch member engaged in said respective indentation of said buckling portion drives said outer linkage member to rotate to drive said assembly body to link said latch to unlock.