US Patent 11499343 Door lock apparatus

A door lock apparatus according to an embodiment of the present invention is mounted in a door and moves a deadbolt to a locked position or a released position as a motor is driven. The door lock apparatus may include a main gear rotated by the motor, a damping clutch part engaged and rotated by rotation of the main gear, a shaft which is engaged and rotated by rotation of the damping clutch part and moves the deadbolt as the shaft is rotated, and a knob which is manually operable by a user and is connected to the shaft. An emergency rotation operation of the shaft may be enabled by disengaging the main gear and the damping clutch part through the knob.