Abstract: A lock device that may be locked automatically includes a base fixed on a door plate. An actuating tube received in the hole of the base is provided with a locking member combined with a handle. The lock core unit has a lock core that may drive an actuating plate to rotate. The drive wheel has a drive slot for insertion of the actuating plate, so that the drive wheel and the actuating plate may be rotated simultaneously. An elastic member has two stop ends rested on the leg of the restoring wheel, and rested on the two sides of the ear plate of the locking plate. The drive plate has a first end inserted into an unlocking rotation knob of the other side of the door plate, and a second end inserted into the drive slot of the drive wheel.

Abstract: An auxiliary lock structure includes a housing seat and a base plate each provided with a positioning hole for allowing a positioning member to be fixed to a door plate. The housing seat is provided with a protruding ring mating with a hole of the door plate. A pivot shaft rotatably passes through the central hole of the base plate and the axial hole of the housing seat. The central hole of the base plate has a periphery provided with protruding lugs. The pivot shaft is fitted with a control piece and an elastic member. The control piece is urged by the elastic member, so that the recesses of the control piece mate with the protruding lugs of the base plate so that the rotation knob can be positioned when its rotation stops.

Abstract: An auxiliary lock includes an exterior lock assembly having a knob and an actuating plate that is connected to the knob to rotate therewith. A casing is mounted inside a door for rotatably supporting a knob that is also connected to the actuating plate to rotate therewith. A control plate is mounted in the casing and includes a first end extended beyond the casing for manual operation. A second end of the control plate includes a notch releasably engaged with one of a number of teeth of an engaging wheel mounted in the casing. The control plate is movable vertically and retained in place by a positioning element. The engaging wheel is connected to the actuating plate to rotate therewith.