Abstract: A reinforced apparatus for a lever handle of a door lock comprises a housing having a first bottom plate and a second bottom plate, in which the first bottom plate connects a first annular wall and a second annular wall, and the second bottom plate connects the second annular wall and a third annular wall; a recess formed between the first annular wall and the second annular wall; and a rotary member, in which a coiled spring is disposed between a first and a second side plates of the rotary member: wherein the second bottom plate of the housing is formed with an axially extending predetermined bending member to be bent inwardly for a predetermined angle, after the rotary member and the coiled spring are disposed within the recess of the housing, so that the rotary member is maintained within the recess of the housing and can be operated externally.

Abstract: A lock set includes a hollow intermediate spindle connected to a door latch and to an inner handle assembly, a turning rod extending inside the intermediate spindle, a coupler connected to a key-operated lock of an outer handle assembly so as to be turned thereby and connected to the turning rod so as to actuate the turning rod, a first clutch plate fitted around the turning rod for rotation together with the turning rod, and a second clutch plate movably disposed around the turning rod for sliding away from or toward the first clutch plate. In a preferred embodiment, the coupler has a hole to receive a tail end of the key-operated lock. The tail end is rotatable limitedly within the hole of the coupler.

Abstract: A restoring structure of a lock comprises: a sleeve disk, having a first wall and a second wall, the first wall interconnecting a first face and a second face, and the second wall interconnecting the second face and a third face, the first face and the second face defining a recess, the first face further having a projection, and the second wall defining a central hole; an integrally formed rotative tube, inserted through the central hole of the sleeve disk, and having an end which is formed with a bent portion at a location corresponding to the projection of the sleeve disk and has at least one protrusion disposed at a predetermined position, the protrusion abutting against the first face of the sleeve disk; a torsion spring having two legs, adapted to fit onto an outer wall of the rotative tube such that the legs engage on the bent portion of the rotative tube and the projection of the sleeve disk; and a guard ring disposed adjacent to the third face of the sleeve disk and adapted to engage with at least on

Abstract: A post-removable construction of a door lock device which is disposed on a plate assembly. The plate assembly can be applied to install a transmission mechanism comprised of an inner spindle, an outer spindle, an inner lever, and outer lever and a latch-retracting mechanism onto a door panel, and drives a latch. The plate assembly is comprised of an inner housing assembly inboard of the door panel and an outer housing assembly outboard of the door panel.

Abstract: An auxiliary lock assembly comprises a housing having a hole, wherein a protrusion radially and inwardly provided on the periphery of the hole; a shaft with various cross-sectional area inserted into the hole of the housing; a longitudinal groove formed on the exterior of the shaft; a circumferential groove formed on the exterior of the shaft and communicating with the longitudinal groove to provide engagement with the protrusion on the housing; an axial hole formed in the axial direction of the shaft; a cover having a hole aligned with the hole of the housing for allowing the shaft to pass through; a knob having an axle portion; an axial hole formed in an axial direction in the knob for allowing the shaft to be inserted therein; a threaded hole formed in a transverse direction in the axle portion of the knob; and a fastening screw being able to thread into the threaded hole and secure the shaft and the knob together.

Abstract: A restoring structure of a lock comprises: a sleeve disk, having a first wall and a second wall, the first wall interconnecting a first face and a second face, and the second wall interconnecting the second face and a third face, the first face and the second face defining a recess, the first face further having a projection, and the second wall defining a central hole; an integrally formed rotative tube, inserted through the central hole of the sleeve disk, and having an end which is formed with a bent portion at a location corresponding to the projection of the sleeve disk and has at least one protrusion disposed at a predetermined position, the protrusion abutting against the first face of the sleeve disk; a torsion spring having two legs, adapted to fit onto an outer wall of the rotative tube such that the legs engage on the bent portion of the rotative tube and the projection of the sleeve disk; and a guard ring disposed adjacent to the third face of the sleeve disk and adapted to engage with at least on

Abstract: A reinforced apparatus for a lever handle of a door lock comprises a housing having a first bottom plate and a second bottom plate, in which the first bottom plate connects a first annular wall and a second annular wall, and the second bottom plate connects the second annular wall and a third annular wall; a recess formed between the first annular wall and the second annular wall, and formed with at least one protruding rib; a rotary member including a first side plate and a second side plate, in which a coiled spring is disposed between the first and second side plates, and has two legs respectively engaging the protruding portion of the housing; characterized in that: the second bottom plate of the housing is formed with an axially extending predetermined bending member to be bent inwardly by an auxiliary apparatus for a predetermined angle, after the rotary member and the coiled spring are disposed within the recess of the housing, so that the rotary member is maintained within the recess of the housing an

Abstract: A door lock includes an outside spindle tube, an insert tube which is disposed inside the outside spindle tube and which has a latch operating tab, and a clutch member disposed inside the insert tube and having first and second axial grooves. The clutch member is movable axially between a first position, in which the first axial groove engages a first engaging member projecting inwardly from the outside spindle tube, and a second position, in which the first axial groove disengages from the first engaging member. The insert tube does not engage the first engaging member of the outside spindle tube, but has a second engaging member in engagement with the second axial groove of the clutch member. When the door lock is placed in a locking position by pressing an inside press button of the door lock, the spindle shaft connected with the press button moves the clutch member to the second position, thereby permitting the outside spindle tube to turn independently of the insert tube.

Abstract: An electrically operated drive device includes a wheel gear rotatably mounted on a spindle of a turning lever of a door lock. The wheel gear is driven by a motor, and has a cam member disposed thereon. A crank member has a crankshaft mounted on and rotatable with the spindle, and a crank pin. A shifting mechanism is disposed between the wheel gear and the crank member, and includes front and rear major walls that cooperate respectively with the crank member and the cam member to permit right and left displacement of the shifting member to thereby bring a deadbolt to one of retracted and extended positions.

Abstract: A lock assembly includes a handle assembly including a tubular member having an axial hole defined in a first end thereof and extending along a longitudinal axis thereof and a receptacle defined in a second end thereof and in communication with the axial hole, and a handle formed on the second end of the tubular member. A lock core assembly is removably mounted to the receptacle of the handle assembly and includes a lock core therein. The lock core includes a key hole defined in a first end thereof. A transmission device is received in the axial hole of the tubular member and includes a first end and a second end. The second end of the transmission device includes an end face plate extending in a direction transverse to a longitudinal axis of the key driving means, and two spaced positioning rods project outwardly from the end face plate and extend away from the first end along a direction parallel to the longitudinal axis of the transmission device.

Abstract: A lock set for a door has a cylindrical spindle integrally coupled with a knob and containing a slide plate which can be actuated to lock and unlock the cylindrical spindle against rotation. The cylindrical wall of the spindle is provided with two diametrically opposing grooves which extend axially from one end thereof to a predetermined depth and which are opened at the one end so as to facilitate installation of the slide plate in the spindle. The slide plate has two opposing lugs for insertion into the grooves.

Abstract: A device for holding and adjusting the opening angle of a door includes a first lever having a forked end with two generally parallel lugs which are respectively provided with substantially aligned first and second pivot holes, and a second lever which has a journal member for insertion into the first pivot hole, the journal member having a threaded hole and a first engagement surface. A first detent member is inserted between the parallel lugs and has a pivot slot aligned with the first and second pivot holes. The first detent member further includes a second engagement surface for engagement with the first engagement surface, and a detent face. A resilient second detent member is mounted inside the first lever inwardly of the forked end to engage the detent face.

Abstract: A lock set for a door has a cylindrical spindle integrally coupled with a knob and containing a slide plate which can be actuated to lock and unlock the cylindrical spindle against rotation. The cylindrical wall of the spindle is provided with two diametrically opposing grooves which extend axially from one end thereof to a predetermined depth and which are opened at the one end so as to facilitate installation of the slide plate in the spindle. The slide plate has two opposing lugs for insertion into the grooves.

Abstract: A latch bolt operating device is adapted for use with a latch bolt unit that is installed in a door panel, and includes exterior and interior operating units. The exterior operating unit includes a key-operated plug-and-cylinder lock assembly, and an exterior housing having an outer annular cover, an inner annular cover and an annular shield. The outer annular cover has a rear end portion formed with a first annular shoulder. The inner annular cover is received in the outer annular cover and has a rear end portion formed with a second annular shoulder. The annular shield extends into the rear end portion of the inner annular cover and has a peripheral portion which engages the second annular shoulder when the latter is bent. The interior operating unit includes a torque bar and an interior housing. The torque bar can be positioned releasably in a first position corresponding to an extended position of a bolt of the latch bolt unit and a second position corresponding to a retracted position of the bolt.

Abstract: A reinforcing apparatus for a lever handle of a door lock includes a housing fixed to a door and provided around a driving shaft of the door lock. The housing has a wall transverse to the driving shaft. The wall has a hole formed therethrough for passage of the driving shaft. A rotary member is mounted in the housing for rotating simultaneously with the driving shaft. The rotary member is sleeved on the driving shaft and has an engaging plate which projects axially from an outer peripheral edge thereof. A coiled spring is provided around the rotary member for biasing the rotary member to return and maintain the lever handle at its original unoperated position after the rotary member is rotated by the lever handle. The coiled spring has two legs extending radially outwardly to abut against the engaging plate. One of the legs is displaceable by the engaging plate. The housing further includes a stopping unit provided on the wall thereof.

Abstract: A door lock set includes a housing set to be mounted on an outer side of a door, an outside rotary lock unit mounted on the housing set and provided with a rotatable deadbolt spindle, a deadbolt assembly having a deadbolt and a bolt driving mechanism operatively driven by the deadbolt spindle for extending the deadbolt outwardly to lock the door, an outside lever mechanism mounted on the housing set and provided with a rotatable latch spindle, a latch assembly having a latch and a latch driving mechanism operatively driven by the latch spindle for extending the latch outwardly to lock the door, and a link assembly. The link assembly includes a pull shaft connected operably to the outside lever mechanism so as to drive rotatably the latch spindle, a coupling shaft connected pivotally to the pull shaft and mounted pivotally to the housing set, and a driving cam connected operably to the outside rotary lock unit for co-rotation with the deadbolt spindle.

Abstract: A lock assembly includes a linkage mechanism which is operable from the outside of a door via a lever and which is drivingly connected to a latch. An inside operating mechanism which is operable from the inside of the door is connected to the linkage mechanism so that the inside operating mechanism need not be connected to the latch. The lock assembly is suitable for use with a latch having only one cam wheel or two cam wheels.