Abstract:
In an embodiment, a latch includes a ratchet and pawl. A lock includes a link pivotable between unlocked and locked positions wherein a release lever operates the pawl, and the lever disconnects from the pawl respectively. A cam rotates between unlocking and locking positions wherein the link can move to the unlocked position, and the link pivots to the locked position respectively. An override member rotates between actuatable and non- actuatable positions wherein the lever can engage the override member to unlock the cam, and the lever disconnects from the override member respectively. The lock is positionable in an unlocked state wherein the link is unlocked, a locked state wherein the link is locked, the cam is in the locking position and the override member is actuatable, and a second locked state wherein the link is locked, the cam is in the locking position and the override member is non-actuatable.
Abstract:
In a particular embodiment, the door latch system includes a ratchet, a pawl, a release lever, a lock link, a double lock lever and a double lock override lever. The ratchet is movable between a closed position for holding a striker, and an open position. The pawl is movable between a ratchet locking position wherein the pawl holds the ratchet in the closed position, and a ratchet release position wherein the pawl permits the ratchet to move to the open position. The release lever is movable between a rest position and a pawl release position. The lock link is movable between an engagement position and a disengagement position. In the engagement position the lock link is positioned to transfer movement of the release lever to the pawl release position into movement of the pawl to the ratchet release position. In the disengagement position the lock link does not transfer movement of the release lever to the pawl release position into movement of the pawl to the ratchet release position. The double lock lever is movable between a double locking position wherein the double lock lever prevents movement of the lock link out of the disengagement position, and an undouble locking position wherein the double lock lever permits movement of the lock link to the engagement position. The double lock override lever is movable between a first position wherein the double lock override lever prevents the double lock lever from being in the double locking position, and a second position wherein the double lock lever is movable to the double locking position. The ratchet has a double lock override control surface thereon that is positioned to move the double lock override lever to the first position when the ratchet moves to the open position.