A bolt restraint mechanism for restraining a bolt of a bolting mechanism. The bolt restraint mechanism includes a bolt moveable between thrown and retracted positions and a catch plate having an aperture through which the bolt extends. The catch plate is biased to pivot such that a restraint surface of the aperture pushes against the bolt to restrain movement of the bolt. A release trigger is arranged such that when depressed the release trigger pushes against the catch plate to pivot thereby releasing the restraint surface from pushing against the bolt to release the bolt. The catch plate may be biased such that when the restraint surface pushes against the bolt to restrain movement of the bolt, the catch plate is non-orthogonal to the bolt.

The invention relates to a locking device (10) for a door leaf (204) of a door assembly (200), having a faceplate (12), a drive means (14) attached to the face plate (12), and at least one drive rod (21, 22) extending along a longitudinal direction (20), wherein the drive rod (21, 22) can be driven by the drive means (14) and can be displaced along the longitudinal direction (20) when driven by the drive means (14), wherein a respective coupling means (25) for coupling to a drive bolt (26, 27) is attached to the at least one drive rod (21, 22), wherein the coupling means (25) has a receptacle (30) in which the drive bolt (26, 27) can be inserted with an end section (26), wherein the coupling means (25) and the drive bolt (26, 27) are configured such that the drive bolt (26, 27) is coupled to the coupling means (25) by latching when the end section (26) is inserted into the receptacle (30). A door assembly (200) and a method for installing a locking device (10) on the door assembly (200) are disclosed.

The invention relates to a locking device for a door leaf of a door assembly, having a faceplate, a drive means attached to the face plate, and at least one drive rod extending along a longitudinal direction, wherein the drive rod can be driven by the drive means and can be displaced along the longitudinal direction when driven by the drive means, wherein a respective coupling means for coupling to a drive bolt is attached to the at least one drive rod, wherein the coupling means has a receptacle in which the drive bolt can be inserted with an end section, wherein the coupling means and the drive bolt are configured such that the drive bolt is coupled to the coupling means by latching when the end section is inserted into the receptacle. A door assembly and a method for installing a locking device on the door assembly are disclosed.