A length adjustable door lock includes a latch assembly, a lock core connected with the latch assembly, a lock bolt connected with the lock core, and a housing sleeved on the lock bolt. The latch assembly and the lock core respectively have an embedding opening and slot having matchable shape, wherein a buckling portion is formed and provided on the lock bolt coordinately, wherein the buckling portion is adapted for being assembled in the slot of the lock core through the embedding opening, which is easy for the assembling.

A length adjustable door lock includes a latch assembly, a lock core connected with the latch assembly, a lock bolt connected with the lock core, and a housing sleeved on the lock bolt. The latch assembly and the lock core respectively have an embedding opening and slot having matchable shape, wherein a buckling portion is formed and provided on the lock bolt coordinately, wherein the buckling portion is adapted for being assembled in the slot of the lock core through the embedding opening, which is easy for the assembling.

A door assembly is provided having a latch assembly. The latch assembly includes a head portion, a first latch housing, a second latch housing, a latch hub, and a hub cradle. The latch housings both define a respective opening. The hub cradle defines a recess offset from a center of the hub cradle. The hub cradle is positioned between the latch housings, and the latch hub is positioned in the hub cradle so that it is aligned with the recess. The hub cradle is configured to be received in the openings of the latch housings to provide a latch assembly having a short backset panel configuration or a long backset panel configuration. A distance from the head portion to the latch hub in the long backset panel configuration is larger than a distance from the head portion to the latch hub in the short backset panel configuration.

A tool for adjusting the backset of a latch bolt. The latch bolt includes a latch bolt and a tailpiece. A housing receives the latch bolt and includes a transversely extending protrusion. A casing slidably receives the housing such that the protrusion on the housing is received in a slot on the casing and an inner end of the tailpiece extends from the housing and casing. The casing is rotated relative to the housing to allow relative axial movement between the casing and the housing when transitioning between the first backset position and the second backset position. The tool includes a member defining a first slot for receiving the inner end of the tailpiece and a pair of second slots for receiving the pair of ears such that rotation of the tool rotates the tailpiece and the casing simultaneously.

A tool for adjusting the backset of a latch bolt. The latch bolt includes a latch bolt and a tailpiece. A housing receives the latch bolt and includes a transversely extending protrusion. A casing slidably receives the housing such that the protrusion on the housing is received in a slot on the casing and an inner end of the tailpiece extends from the housing and casing. The casing is rotated relative to the housing to allow relative axial movement between the casing and the housing when transitioning between the first backset position and the second backset position. The tool includes a member defining a first slot for receiving the inner end of the tailpiece and a pair of second slots for receiving the pair of ears such that rotation of the tool rotates the tailpiece and the casing simultaneously.

A latch includes a latch housing including a first housing portion and a second housing portion separable from the first housing portion. The second housing portion includes a keeper. A first arm member is in rotational communication with the first housing portion. The first arm member is configured to rotate about a first axis between a first position and a second position. A second arm member is in rotational communication with the first arm member. A latch load pin is in rotational communication with the first arm member about a second axis. The latch load pin is configured to mate with the keeper with the first arm member in the first position. The second arm member in the first position is configured to be fixed relative to the first arm member as the first arm member rotates from the first position toward the second position.

A latch includes a latch housing including a first housing portion and a second housing portion separable from the first housing portion. The second housing portion includes a keeper. A first arm member is in rotational communication with the first housing portion. The first arm member is configured to rotate about a first axis between a first position and a second position. A second arm member is in rotational communication with the first arm member. A latch load pin is in rotational communication with the first arm member about a second axis. The latch load pin is configured to mate with the keeper with the first arm member in the first position. The second arm member in the first position is configured to be fixed relative to the first arm member as the first arm member rotates from the first position toward the second position.

A Temporary Construction door latch/lock is disclosed which is both rugged and economical. The latch includes a half circle flanged housing which acts as a bushing for a journal portion of an operator. The operator includes 2 slots (For 2″¾ and 2″⅜ size doors) to accommodate the latching and the locking pin that serves also as the handle portion to move the latch back to open the door. At the inner end of the operator, a generally cylindrical latch is placed to the interior of the housing through the face of the door to interact with the frame. The latch moves back and force with respect to the housing and is limited in movement by a spring goes inside the housing. The latch is secured to the operator by a latching and a locking pin, which means to prevent the whole latch to come apart. The housing is fixed to the door by securement means which draws the flange of the housing against the exterior of the door.

A latch is operable between a disengaged position and an engaged position releasably connecting a latch mounting pin on a first static structural element to a keeper on a second, movable structural element. The latch includes means for adjusting the throw of the hook to accommodate different distances between the latch mounting pin and the keeper due to manufacturing tolerances or different applications. The latch has a tension mechanism, a hook connected to the tension mechanism, and a handle pivotably connected to the tension mechanism and operable to actuate the tension mechanism between engaged and disengaged positions with the keeper. The latch is operable between the engaged and disengaged positions by rotating the handle between a closed position and an open position.

A door bolt lock structure contains: a casing, a drive element, a slide plate, and a head. The casing includes a cavity and a locking orifice. The drive element is accommodated in the cavity and includes a lock cylinder and a control lever. The slide plate slidably is received in the drive element and includes a holder, a groove, a free segment, a first locating orifice, and a second locating orifice. The head includes a trench and a threaded orifice, such that the threaded orifice is selectively aligned with the first locating orifice or the second locating orifice of the slide plate, and a second screw element is inserted through the locking orifice of the casing, the first locating orifice or the second locating orifice, and the threaded orifice of the head so as to adjustably move the head with respect to the slide plate.