A handle-locking mechanism for a door comprises a sliding bar, a locking member and a rotatable member all inside a lock body, wherein the rotary motion of the rotatable member drives an upper latch and a lower latch to a locking position and unlocking position; the sliding bar is slidably arranged inside the lock body and one end of the sliding bar abuts against the bolt, and the sliding bar is provided with a first elastic element, and the sliding bar is pushed against the elastic force from the first elastic element when the bolt retracts; the locking member is coupled with the sliding bar, and when the bolt stretches out, the locking member is brought by the sliding bar to a position to block the rotary motion of the rotatable member.

A door locking system includes two door handle units and a mounting device. The mounting device includes two mounting plates and two mounting pins. The mounting pins are fixed radially and axially in the mounting plates, and the mounting plates are secured coaxially at an axial distance. Each door handle unit is secured on the respective mounting plate, facing away from the mounting pins. Further, in the first mounting plate, two first openings are formed in which the two mounting pins are received. The first openings are formed by flaps pivoted to the mounting plate. The flaps can together be brought into a mounting position and into a blocking position by a blocking unit. In the mounting position, the flaps are freely pivotable, and in the blocking position, the flaps are pressed on toward the respective mounting pin by the blocking unit.

An anti-unlocked mechanism comprises a transmission gear, a sliding rod, a locking member and a first elastic member. The transmission gear includes an arc surface. An end of the sliding rod contacts the deadbolt of the lock body. The sliding rod is provided with a fixed stopper and a second elastic member. When the deadbolt is retracted, the sliding rod moves with the deadbolt against the elastic force of the second elastic member. When the deadbolt extends, the locking member moves with the sliding rod to block the rotation of the rotating part. The first elastic member comprises first and second protrusions. The second protrusion will not hinder the fixed stopper of the slide rod unless the first protrusion contacts with the circular arc surface, which will block the movement of the locking member to block rotation of the rotating part.

An exemplary apparatus includes a modular, self-contained spring cage and a spindle. The spring cage includes a housing and a clock spring mounted in the housing, and the clock spring includes a first leg and a second leg. The spindle extends through the spring cage, and is rotatable from a home position about a longitudinal axis in each of a first rotational direction and a second rotational direction. Rotation of the spindle from the home position in the first rotational direction causes pivoting of the first leg while the second leg remains stationary, thereby causing the clock spring to urge the spindle to return to the home position. Rotation of the spindle from the home position in the second rotational direction causes pivoting of the second leg while the first leg remains stationary, thereby causing the clock spring to urge the spindle to return to the home position.

An exemplary catch assembly is configured for installation into a spindle, and generally includes a holder, a first catch, a second catch, and a bias mechanism. The holder is configured for mounting within the spindle. The first catch is mounted for movement relative to the holder between a first projected position and a first depressed position. The second catch is mounted for movement relative to the holder between a second projected position and a second depressed position. The bias mechanism biases the first catch toward the first projected position and biasing the second catch toward the second projected position.

A transmission mechanism applied to a lock and for controlling the lock to switch between an unlocked state and a locked state. The lock includes a first handle set including a first cover plate which includes a first fitting portion. The transmission mechanism includes a transmission element and a moving component. The transmission element is connected to the first handle set in a manner that the transmission element is incapable of moving along a rotating axis and has an abutting portion. The moving component is disposed on the transmission element in a manner that the moving component is capable of moving along the rotating axis and includes a first engaging groove, a second engaging groove and a second fitting portion. When the transmission element is operated to rotate, the abutting portion is capable of switching between the first engaging groove and the second engaging groove.

An installation body used as an axially fixed and rotatable receptacle for a handle. The handle consist of a circumferential engagement groove in a neck section of the handle that is in contact with the installation body. The installation body is composed of a base body with a passage opening aligned centrally with an axis (D), a guide bushing for the neck section of the handle, whereas the guide bushing is arranged inside the passage opening of the base body and locking mechanism, which fixates the handle inside base body in a releasable manner. The locking mechanism uses locking balls, which are adjustable arranged radially in the direction of the axis inside the guide bushing. The latter is positioner the passage opening of the base body in a direction (A) in an adjustable manner, wherein the guide bushing, or the base body, has a circumferential inclined surface that is acted upon by a pressure spring the direction (A).

The present disclosure defines a lever handing apparatus that permits simplified changing of the handing of a lever handle between a left hand and a right hand orientation. The lever handing apparatus includes an assembly with a rotatable spring cage housing and lever spindle that can be selectively rotated within an escutcheon housing to change the handing position of a lever arm. The handing orientation of the lever can be repositioned without removing a back plate or accessing internal components positioned within the escutcheon housing assembly.

An apparatus that at least assists in maintaining a lever or knob of a lock device in a relatively neutral and static position. The apparatus includes a biasing element that can be constructed from a compliant material that may at least assist in reducing impact forces between interfacing surfaces at least when the lever or knob is returns to the neutral, static position from one or more activated positions. The compliant nature of the damper can further alleviate issues relating to manufacturing tolerances and wear between interfacing surfaces.

The standard spring retainer for a retract slide is upgraded in three embodiments. In the first embodiment, a first switch mounted on the upgraded spring holder is activated when the latch is retracted (from either side of the lock). In the second embodiment, the first switch is activated when either the latch is retracted or the latch bolt is pushed in by the latch hitting the strikeplate as the door is closing. A spring carrier/switch activator is added to the retract slide that is pushed back by the latch tailpiece. In the third embodiment, two switches monitor up to four conditions—when the door is open, closing, and closed and when the latch is being retracted by the inner or outer handle.