Tong Lung Metal Industry Co., Ltd.

Lan-Kun Don

Ching-Chuan Kuo

San-Yi Lin

Rong-Faa Wu

Yaw-Shin Fann

Cheng-Chung Liu

Po-Yang Chen

Sheen-Youl Gao

Ming-Shyang Chiou

Tsung-Chung Huang

Cheng-Wen Lai

Tong-Pei Wu

Jeff Fang

Ming-Shyang Chiao

A cylinder lock includes an outer rose disc having a middle opening, two locking holes, and an annular lateral rim formed with opposite engagement elements, a reinforcement structure having a first plate section that has a central hole aligned with the middle opening, and two passage holes aligned with the respective locking holes, two second plate sections extending transversely from two opposite ends of the first plate section, and two support sections respectively extending from the second plate sections to the lateral rim to engage the engagement elements. An outer drive tube extends through the middle opening and central hole. The reinforcement structure provides enhanced stiffness and robustness to two securing rods extending through the locking holes and the passage holes.

Cylinder lock having a reinforcement structure coupled to an outer rose disc

A cylinder lock includes a shell that has an enlarged tubular section, and a constricted tubular section. A retractor case that contains a latch retractor for retracting a latch is disposed within the enlarged tubular section. An inner surface of the enlarged tubular section is provided with an interlocking unit that interlocks with the retractor case to prevent relative rotational movements of the retractor case and the shell. In an embodiment, the retractor case has at least one tongue extending radially between a pair of annularly spaced apart interlocking elements of the interlocking unit.

Cylinder lock with reinforcements to improve structural strength

A cylinder lock includes a latch retractor housing having inner and outer cover plates, inner and outer drive spindles extending respectively through the inner and outer cover plates, a sleeve surrounding the outer drive spindle and having a flange contacting the outer cover plate, an outer shell surrounding the inner drive spindle and the latch retractor housing, and at least one rigid coupling member or tube disposed within the outer shell and engaging and coupling together the inner and outer cover plates and the flange, thereby reinforcing the outer drive spindle and the latch retractor housing and increasing torsional and compression strengths thereof. A reinforcing ring is further provided to couple the outer drive spindle to the outer handle for reinforcement.

Cylinder lock having improved torsional strength

A door lock includes upper and lower cam mechanisms mounted on an inner support plate, and a slide plate disposed between the upper and lower cam mechanism. The upper cam mechanism includes a spindle, and an upper cam body mounted on the spindle and having a tab projecting from the upper cam body. The upper cam body is rotatable relative to the spindle to change the tab between a left-hand installation configuration for a left-hand door installation and a right-hand installation configuration for a right-hand door installation. The slide plate has two opposite marginal portions extending respectively into slide passages provided on the inner support plate.

Door lock having an unlocking mechanism for simultaneously unlatching latch-bolt and deadbolt mechanisms

A door lock assembly includes a transverse retaining plate disposed inside a spindle tube and having a stabilizing part and a retaining tongue projecting into a retention slot in a handle. A support structure is disposed within the handle oppositely of the retention slot and has a support part extending radially into the spindle tube. When the door lock assembly is in a locking state and when the retaining tongue in the retention slot is pressed externally, one of two diametrically opposite edges of a tailpiece of a key plug abuts against the support part, and the other one of the edges abuts against the stabilizing part of the retaining plate to restrict the retaining tongue from moving away from the retention slot, thereby preventing undesirable removal of the handle from the door lock assembly.

Door lock assembly having a support structure to support a tailpiece and a retaining plate

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 one lateral slot formed on the rotative tube; whereby when the rotative tube is rotated clockwise or counterclockwise at a desired angle, the torsion spring is compressed to create an elastic deformation such that the at least one protrusion of the rotative tube runs toward the projection of the sleeve disk, and when the rotative tube is released, the rotative tube is returned to its original position by a restoration force of the torsion spring.

Restoring structure of a lock

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.

Post-removable construction of a door lock device

A lock engaging-and-disengaging mechanism, having: a driving tube, containing at least one hole on the inner wall of the tube, and a key driven tube, flexibly installed to the inner tube portion of the first end of the driving tube, and containing at least one hole on the wall of the tube; a sideway component, being installed in the hole on the key driven tube, and allowing the options of engaging or disengaging with the hole on the driving tube, an axially sliding component being inserted inside the key driven tube and having a non-axial slot, a rotatable component is inserted inside the axially sliding component, the rotatable component containing a pin dipping into the non-axial slot of the axially sliding component on rotation of the rotatable component, enabling movement of the pin of the axially sliding component and the non-axial slot of the axially sliding component so as to make the axially sliding component generate axial displacement in order to control the movement of the sideway component that is installed on the key driven tube.

Lock engaging-and-disengaging mechanism

A lock comprising a locking mechanism and a sleeve disk assembly, wherein the locking mechanism comprises: a housing assembly; an outside actuation tube; a key actuation tube; a transmission element; a spring; an outside holding sleeve; a knob rod; when the transmission element is pushed by the knob rod to the first axial position within the key actuation tube, the rotation of the outside actuation tube rotates the outside holding sleeve and the key actuation tube; when the transmission element is at the second axial position within the key actuation tube, the rotation of the outside actuation tube does not rotate the key actuation tube.

Lock

An adjustable device for an auxiliary lock to be mounted on a door for security purpose, comprises an adaptor and a guard collar, wherein the adaptor comprises a first section with a smaller diameter, a second section with a larger diameter, a third section connecting the first and the second sections, a fourth section connecting to the third section; the guard collar has a first recess and a second recess to receive the fourth section, respectively, whereas if the fourth section matches into the first recess, the first section of the adaptor is available to the door with a smaller lock hole, and whereas the fourth section matches into the second recess, the second section of the adaptor is available to the door with a larger lock hole.

Adjustable device for an auxiliary lock

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.

Latch bolt operating device

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. The stopping unit is aligned radially with and is located outwardly of the engaging pate when the lever handle is in the unoperated position. The other one of the legs is kept immobilized by the stopping unit when the rotary member rotates.

Reinforcing apparatus for a lever handle of a door lock

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. The driving cam contacts the coupling shaft and drives the coupling shaft to pivot so as to pull the pull shaft and enable the pull shaft to drive rotatably the latch spindle in order to result in simultaneous retraction of the deadbolt and the latch when the outside rotary lock unit is operated to rotate the deadbolt spindle.

Door lock set with simultaneously retractable deadbolt and latch

A door lock includes a deadbolt assembly and a lock housing assembly. The deadbolt assembly has a bolt member which includes a metal inner sleeve, a metal outer sleeve fitted over the inner sleeve and made of a material which is different from that of the metal inner sleeve and which has anti-corrosion properties, and a security bar disposed axially in the inner sleeve. The lock housing assembly includes an exterior housing section with a cylindrical chamber that receives rotatably an exterior lock cylinder unit therein. The lock cylinder unit has a key-operated rotary plug with a rearwardly projecting spindle that is connected operably to the deadbolt assembly. An interior sleeve member is formed as a cylindrical wall with a front end which is secured to the rear side of the lock cylinder unit and a rear end which is formed with diametrically opposite notches. The deadbolt assembly extends through the sleeve member via the notches. A pair of bolts pass through bolt holes of an interior housing section, the mounting holes of the side plates, the front end of the sleeve member, and engage threadedly the threaded holes of the lock cylinder unit.

Door lock having a deadbolt assembly with a low-cost corrosion-resistant

A face plate includes a tubular member for freely and rotatably receiving a latch housing and having a first end and a second end. An opening is formed in the first end through which a latch bolt passes and has a diameter smaller than an outer diameter of the latch housing. The second end of the tubular member has an inner diameter smaller than the outer diameter of the latch housing. A flange extends radially and outwardly from the first end of the tubular member. The tubular member further has a plurality of axially extending projections formed on an outer periphery thereof.

Growing community of inventors

Chiayi, Taiwan

Lan-Kun Don