Door lock mechanism

A door lock mechanism kit configured to be assembled and installed on a door, comprising:

• an outer handle operably coupled configured to be attached to a door latch bolt such that rotating the outer handle retracts the door latch bolt;
• an inner handle configured to be operably coupled to the door latch bolt such that rotating the inner handle retracts the door latch bolt, the inner handle comprising a handle portion connected to a cylinder, the cylinder forming a cylindrical cavity which extends distally from the handle portion along a longitudinal axis;
• a locking knob assembly comprising a locking knob connected to a locking bar, the locking knob forming a proximal end of the locking knob assembly and the locking bar extending distally from the locking knob to a distal end of the locking bar;
• the locking bar having a longitudinal cross-hole having a cross-shaped cross-section forming two intersecting slots such that the cross-hole is configured to receive a locking lever in one of the intersecting slots in a first rotational orientation and the cross-hole is configured to receive the locking lever in the other one of the intersecting slots in a second rotational orientation different than the first rotational orientation, the cross-hole having open end at the distal end of the locking bar, the locking bar rotatably received in the cylinder of the inner handle;
• a locking lever comprising a flat bar having a proximal portion and a distal portion, the proximal portion of the locking lever configured to be inserted into either of the intersecting slots of the cross-hole, the distal portion of the locking lever configured to be operably coupled to a locking mechanism,
• the locking mechanism configured to be actuated between a locked state and an unlocked state by rotation of the locking lever which is rotatable by rotation of the locking knob, wherein in the locked state the locking mechanism prevents the outer handle from retracting the door latch bolt and in the unlocked state the locking mechanism enables the outer handle to retract the door latch bolt;
• a guide sleeve disposed in the cylinder of the inner handle, the guide sleeve having a proximal tube portion and a distal tapered portion, the distal tapered portion extending distally from a distal end of the proximal tube portion and tapering radially outward as the distal tapered portion extends distally, the guide sleeve receiving the distal end of the locking bar such that the open end of the cross-hole is within the proximal tube portion, wherein the guide sleeve functions as a guide to direct the locking lever into the cross-hole of the locking bar during assembly of the door lock mechanism.