Abstract: An anti-break lock includes a body and two rods respectively extend from two ends of the body. Two rings extend radially from the body. The body has a passage which communicates with one of the rings and the ring is engaged with an engaging block. The engaging block has a recess in which a pad is received. The passage has a resilient member and a stop pin received therein and the stop pin has a first shoulder and a second shoulder formed in two ends thereof. A contact portion extends from the second shoulder. The body has a room which communicates with the passage. A resilient piece and an engaging member are received in the room. When the lock is damaged, the contact portion is inserted into the recess and stopped by the engaging member so that it cannot move back to its initial position. The lock cannot be unlocked.

Abstract: A drawer lock includes a housing with a cam received therein and the cam has a driving member. A deadlocking bolt in the housing has a driven member which is located so that it can be contacted by the driving member. A main bolt located in the housing and is driven by the cam. The main bolt has a stop portion which can be contacted by the driving member. The main bolt has an engaging stepped face. When the deadlocking bolt is pushed down responsive to closing the drawer, the driven member is engaged with the engaging stepped face by a bias force of a resilient member so that the drawer lock cannot be unlocked. When the cam rotates in one direction, the driving member contacts the stop portion to position the main bolt so that the drawer is not locked unintentionally.

Abstract: An anti-break lock includes a body and two rods respectively extend from two ends of the body. Two rings extend radially from the body. The body has a passage which communicates with one of the rings and the ring is engaged with an engaging block. The engaging block has a recess in which a pad is received. The passage has a resilient member and a stop pin received therein and the stop pin has a first shoulder and a second shoulder formed in two ends thereof. A contact portion extends from the second shoulder. The body has a room which communicates with the passage. A resilient piece and an engaging member are received in the room. When the lock is damaged, the contact portion is inserted into the recess and stopped by the engaging member so that it cannot move back to its initial position. The lock cannot be unlocked.

Abstract: A lock core includes a casing having a space defined axially therein and multiple top bead holes defined radially in the casing. The casing has at least one side bead hole and a side bead unit is located in at least one side bead hole. The side bead unit has a side bead and a resilient member mounted to outside of the side bead. The side bead has a neck and a flange. A core is located in the space and has bottom bead holes and a keyhole which communicates with the bottom bead holes which communicate with the top bead holes. Each of the bottom bead holes has a stepped portion formed therein which is located corresponding to the flange of the side bead. The depth of each of the stepped portions is not larger than the total length of the neck and the flange.

Abstract: A high security lock core structure includes a case, a core, multiple side bead units and multiple bead units. The case includes side holes for receiving the side bead units. The core includes bottom holes which communicate with the top holes. The bead units are located in the top holes and the bottom holes. Each side bead unit includes a side bead and a first resilient member. Each bead unit includes a bottom bead, a top bead, a second resilient member and a cover. The top bead of one of the bead units is replaced by a cone-shaped locking bead which has a cone-shaped base and located at the interfaces of the top and bottom holes to make the core be locked. When the core is in unlocked status by malicious ways, the bottom holes are moved to the side holes to lock the core again.

Abstract: A drawer lock set includes a body with a tubular member and a block extends radially from an inner periphery of the tubular member. A cylinder and a core are received in the tubular member. The core includes a driving piece extending from a distal end thereof and is capable of driving a transmission member which is able to rotate a driving member. The driving member includes a protrusion which is slidably engaged with a groove defined in the dead bolt. The cylinder includes a first notch and a second notch in an outer periphery thereof and a 90-degree angular distance is defined between the first and second notches. The block is engaged with one of the first and second notches so as to set the position of the operational direction of the dead bolt with only one part replaced.

Abstract: An anti-theft lock includes a cylinder having multiple upper pin holes and a core is rotatably received in the cylindrical recess and has multiple lower pin holes which communicate with the upper pin holes. Each lower pin hole includes a shoulder located close to the wall of the core. A lower pin, an upper pin, a spring and a cap are installed into the aligned lower pin hole and upper pin hole in sequence. A special lower pin, a special upper pin, one of the springs and one of the caps are received in one of the aligned upper pin hole and lower pin hole. The special upper pin includes ridges rested on the shoulder of the lower pin hole and a gap is defined between the special upper pin and the special lower pin.

Abstract: A drawer lock set includes a body with a tubular member and a block extends radially from an inner periphery of the tubular member. A cylinder and a core are received in the tubular member. The core includes a driving piece extending from a distal end thereof and is capable of driving a transmission member which is able to rotate a driving member. The driving member includes a protrusion which is slidably engaged with a groove defined in the dead bolt. The cylinder includes a first notch and a second notch in an outer periphery thereof and a 90-degree angular distance is defined between the first and second notches. The block is engaged with one of the first and second notches so as to set the position of the operational direction of the dead bolt with only one part replaced.

Abstract: A vandal-resistant combination padlock includes a lock body, a core, a claw mount, a locking claw and an U-shaped locking shackle. The lock body has a cavity well for containing a core and shackle. The core has plural sets of numerical dial wheels and coupling tumbler cams as well as a claw mount together with a rocking claw inserted therein. The rocking claw has a latching lever, plural pawls, a blocking dog and a clipping spring. The claw mount has a pair of cantilevers with each shoulder, a ledge and plural dividing ribs extended downwardly for inserting between the adjacent numerical dial wheels. By of the claw mount, the rocking claw is enclosed therein, the numerical dial wheels are properly inserted by the dividing ribs and all the internal components are well protected to avoid damage from an external force or tool.

Abstract: A pad lock includes an outer casing, a lock main body, and a shackle. A stem is slidably mounted in the lock main body. Several number wheels are rotatably mounted around the stem. Also rotatably mounted around the stem are several retaining sleeves each being releasably engaged with an associated number wheel to rotate therewith. A lever member includes a first end for releasably engaging two pin members to retain the shackle in a locked status. The lever member includes a second end with a number of tongues for engaging with the retaining sleeves. A positioning member is formed on the second end of the lever member. A safety pin is mounted to the lever member to assure the positioning member in a position that prevents setting of a new code when any one of the number wheels is not in the correct position for unlocking.