Abstract: A door handle module and a door lock using the same are disclosed. The door handle module according to the present invention is provided with a hollow rotating piece, a torsion spring enclosing an outer circumference of the rotating piece and being engaged with the locking protrusion formed in the mounting recess by both ends thereof, and a hollow operating piece being fixed to the outside of the rotating piece and includes a shoulder edge formed on a circumference thereof to mount the both ends of the torsion spring and an operational edge formed on an inner circumference thereof to be connected to the handle. Accordingly, the handle that has been turned to open the door can be turned back by a recovery force of the torsion spring so as to be able to maintain its neutral position, and the structure of the door handle module and the door lock can be simplified.

Abstract: The present invention relates to a convertible door lock device with a removable supporting pipe, which guarantees compatibility in construction according to a type of a door, being capable of selectively employing a movement preventing structure implemented by a supporting pipe according to the door type. The door lock device according to the embodiment of the present invention comprises the supporting pipe constituted by a pipe body including a fastening hole therein and a head part formed at one end of the pipe body, and a seating recess formed on an inner surface of the outer bracket for selective insertion of the head part of the supporting pipe. The head part of the supporting pipe is inserted in the seating recess of the outer bracket and the pipe body is inserted in a supporting hole dedicatedly formed on the door at a position outer than the mounting hole to be bolt-connected at the inside of the door through the fastening hole.

Abstract: A backset adjustment structure for a dead bolt assembly having a dead bolt connected with an operating plate, a support tube connected to support plates, and an operating lever operating the dead bolt, including cover plates enclosing the support plates and each having a hole for receiving the operating lever; a catch plate installed next to the operating plate to be moved along with the cover plates, and having catch grooves in which a given sized catch boss, provided to the operating plate, is fitted; the operating plate having a front end connected with the dead bolt by a pin and able to be turned down, and a space with a slant at its middle; and a button with a protruded slant formed on one of the cover plates, and operating to turn the operating plate down.

Abstract: An apparatus for simultaneously unlocking a locked dead bolt functioning as an auxiliary locking device when a lever of a cylinder door lock is turned from the interior side, in order to promptly and conveniently open a door on the inside. This is possible because an actuating body is installed on the inside for unlocking the dead bolt by rotation of a lever as well as making the lever restore.

Abstract: A door lock comprises: a spindle with projections; a bushing having grooves which mate with the projections of the spindle, and a key groove on one side thereof; an inside inner spindle with two fitting grooves, which is inserted into the spindle and rotates by an operation shaft of a key box; a locking spring which is inserted into the inside inner spindle; an inside outer spindle which is inserted, spaced a short distance from the inside inner spindle, having two guide apertures, a latch operation projection with an operation groove, and two fitting projections on its front end, which are fitted in the fitting grooves; a support washer which is inserted into the inside of the inside outer spindle; a spindle spring which is supported by the support washer; an operation disk with two guide projections which are inserted into the guide apertures of the inside outer spindle; and an operation key which is inserted into the key groove of the bushing so that its front end is inserted into the operation groove of t

Abstract: An extension unit for a door lock in which it is possible to readily change the backset of the door lock unit to accommodate standard backsets of 23/8 inches and 23/4 inches. The extension unit comprises an extension element, a connector element and a housing element, all of which, in combination, permit the backset to be easily and readily changed.