Door lock having a double lock for disabling a double action mechanism wherein a lock is normally switched to an unlocked position by using an inside handle

摘要

A door lock apparatus includes an inside handle lever 17 that, when an inside door handle D2 arranged inside a vehicle is open-operated while a lock mechanism 30 is in an unlocked state, transmits the open-operation to a latch mechanism 20, and when the inside door handle D2 is open-operated while the lock mechanism 30 is in a locked state, switches the apparatus to the unlocked position without transmitting the open-operation to the latch mechanism 20. The door lock apparatus also includes a double lock mechanism 60. In a first aspect the sector lever is driven to the unlocked position when the inside handle lever 17 is operated by the action of lock lever 41 driven by the handle lever 17 and integrally moving in a connected state with sector lever 31. Double lock mechanism switches the lock lever and sector lever to an unconnected state wherein movement of lock lever is not transmitted to the sector lever achieving a double locked position. Lock lever 41 and sector lever 31 are preferably connected by spring 42. In a second aspect the double lock mechanism comprises a blocking unit which is linearly movable into the path of the sector lever to prevent the lever from pivoting to the unlocked position. The two aspects may be combined to provide an improved double lock mechanism.