Abstract: A door lock mechanism includes a rotatable spindle, an invertable tubular adapter, a doorknob and an interchangeable lock core. The rotatable spindle has a first longitudinal assembling slot, a second longitudinal assembling slot and a pair of retaining notches. The invertable tubular adapter has a third longitudinal assembling slot, at least one positioning protrusion and an upraised engaging block. During assembly, the third longitudinal assembling slot of the invertable tubular adapter and one of the first longitudinal assembling slot and the second longitudinal assembling slot of the rotatable spindle are aligned to receive the interchangeable lock core. The upraised engaging block is engaged with one of the first longitudinal assembling slot and the second longitudinal assembling slot of the rotatable spindle. The positioning protrusion is positioned in one of the retaining notches of the rotatable spindle to prevent any radial movement of the invertable tubular adapter in the rotatable spindle.

Abstract: A door lock mechanism includes a rotatable spindle, an invertable tubular adapter, a doorknob and an interchangeable lock core. The rotatable spindle has a first longitudinal assembling slot, a second longitudinal assembling slot and a pair of retaining notches. The invertable tubular adapter has a third longitudinal assembling slot, at least one positioning protrusion and an upraised engaging block. In assembling, the third longitudinal assembling slot of the invertable tubular adapter and one of the first longitudinal assembling slot and the second longitudinal assembling slot of the rotatable spindle are aligned to receive the interchangeable lock core. The upraised engaging block is engaged with one of the first longitudinal assembling slot and the second longitudinal assembling slot of the rotatable spindle. The positioning protrusion is positioned in one of the retaining notches of the rotatable spindle to prevent any radial movement of the invertable tubular adapter in the rotatable spindle.

Abstract: A door lock mechanism includes a latch bolt actuating unit, an inner lever assembly, an outer lever assembly and at least two screw members. The latch bolt actuating unit is received in a lock bore of a door plank. In assembling, the inner lever assembly and the outer lever assembly connect with either side of the latch bolt actuating unit, respectively. One of the inner lever assembly and the outer lever assembly provides a reinforcing rose liner on which to provide at least two screw holes for screw-connection with the screw members. In installing operation, the screw members are engaged in the screw holes of the reinforcing liner, and then directly engaged on and slightly inserted into a surface of the door plank. Accordingly, the reinforcing liner securely mounts the lever assembly on the door plank when installed.

Abstract: A latch driving unit is assembled in an exterior knob assembly of a door lock. The latch driving unit includes a pin, a resilient member, a locking disk, a rotatable disk, a torsion spring, a cap and a strip. The strip removably extends through the cap, torsion spring, rotatable disk, locking disk, resilient member and the pin. If the strip is bent with an incorrect length, it can be removed from the latch driving unit and replaced with an intact strip. Thus, the exterior knob assembly is still useful after replacing the strip, and waste is avoided.

Abstract: A latch driving unit is assembled in an exterior knob assembly of a door lock. The latch driving unit includes a pin, a resilient member, a locking disk, a rotatable disk, a torsion spring, a cap and a strip. The strip removably extends through the cap, torsion spring, rotatable disk, locking disk, resilient member and the pin. If the strip is bent with an incorrect length, it can be removed from the latch driving unit and replaced with an intact strip. Thus, the exterior knob assembly is still useful after replacing the strip, and waste is avoided.

Abstract: An alignment structure includes a handle lock mechanism, a lever handle and a spindle barrel. An end of the handle lock mechanism bears a spindle rod member to combine with the spindle barrel. The lever handle provides with an assembling through-hole and a retaining wall thereof. Received in the spindle barrel is the spindle rod member of the handle lock mechanism and the spindle barrel further provides with a positioning protrusion. In assembling operation, a recessed groove of the assembling through-hole engages with the positioning protrusion of the spindle barrel and the retaining wall of the lever handle abuts against the positioning protrusion of the spindle barrel. An end of the spindle barrel is exposed in an annular edge of the assembling through-hole and horizontally aligned with a side surface of the lever handle.

Abstract: An adjustable handle assembly for a lock includes a mounting plate fixed to a side of a door, a spindle, a shank, and a handle. The spindle is mounted in a central hole of the mounting plate and has a portion extending beyond the central hole of the mounting plate. The shank is securely engaged to the spindle to turn therewith. The shank includes an engaging portion having a polygonal outer periphery. The handle has an engaging hole configured complimentary to the polygonal outer periphery of the engaging portion of the shank. The handle has a grip extending therefrom. The engaging hole extends from a side of the handle to the other side of the handle. The engaging hole of the handle is releasably engaged with the engaging portion of the shank, with the grip being located in one of at least three positions with respect to the shank.

Abstract: A direction changeable handle lock structure includes two handles each provided with a first surface and a second surface, and each formed with a combination hole extended through the first surface and the second surface. The handle is formed with a positioning hole communicating with the combination hole. The lock set includes an inner disk unit and an outer disk unit each provided with a shaft tube, for combination with ornamental covers each having a combination portion, so that the combination hole of the handle may be mounted on the combination portion from the first surface or the second surface, and the handle may be fixed by a positioning member.