Abstract: An input shaft of a key lever that transmits a rotating drive force from a key cylinder in response to a key operation is arranged in a lower side of a door housing so that the rain water and the like does not easily reach the input shaft.

Abstract: A door lock system for vehicle doors includes a lock mechanism including a switching lever. The switching lever can be moved freely between a neutral position and a locking position and between the neutral position and an unlocking position. The door can not be opened when the switching lever is moved from the neutral position to the locking position and can be opened when the switching lever is moved from the neutral position to the unlocking position. A link unit that receives a lever operation force from outside of the door and conveys the lever operation force to the switching lever. A holding unit holds the switching lever at the neutral position when the link unit does not receive the lever operation force.

Abstract: An input shaft of a key lever that transmits a rotating drive force from a key cylinder in response to a key operation is arranged in a lower side of a door housing so that the rain water and the like does not easily reach the input shaft.

Abstract: When an inside lock button is operated for locking, an inner wire of a wire cable is drawn into an outer tube of the wire cable so that a lock lever shifts from an unlock state to a lock state, whereas when the inside lock button is operated for unlocking, the inner wire of the wire cable is pushed out of the outer tube of the wire cable so that the lock lever shifts from a lock state to an unlock state.

Abstract: An input shaft of a key lever that transmits a rotating drive force from a key cylinder in response to a key operation is arranged in a lower side of a door housing so that the rain water and the like does not easily reach the input shaft.

Abstract: A door lock device has a lock mechanism configured to allow and not allow opening of a door in an unlocked state and a locked state respectively, and an input shaft configured to switch the lock mechanism between these states when a force is applied to the input shaft. An output shaft is to be engaged with the input shaft so as to transmit the force to the input shaft. The door lock device also has a positioning mechanism configured to hold the input shaft at a position until the output shaft has been engaged with the input shaft and to allow rotation of the input shaft when the engagement has been completed.

Abstract: A door lock system for vehicle doors includes a lock mechanism including a switching lever. The switching lever can be moved freely between a neutral position and a locking position and between the neutral position and an unlocking position. The door can not be opened when the switching lever is moved from the neutral position to the locking position the door can not be opened and can be opened when the switching lever is moved from the neutral position to the unlocking position. A link unit that receives a lever operation force from outside of the door and conveys the lever operation force to the switching lever. A holding unit holds the switching lever at the neutral position when the link unit does not receive the lever operation force.

Abstract: An input shaft of a key lever that transmits a rotating drive force from a key cylinder in response to a key operation is arranged in a lower side of a door housing so that the rain water and the like does not easily reach the input shaft.

Abstract: When an inside lock button is operated for locking, an inner wire of a wire cable is drawn into an outer tube of the wire cable so that a lock lever shifts from an unlock state to a lock state, whereas when the inside lock button is operated for unlocking, the inner wire of the wire cable is pushed out of the outer tube of the wire cable so that the lock lever shifts from a lock state to an unlock state.

Abstract: An impact resistant vehicle door latch device comprises a locking mechanism provided on a metal back plate fixed to a latch body. The locking mechanism has an inner locking lever which has a first base portion rotatably mounted to the back plate by a metal supporting shaft and a first tip portion extending toward an interior side of a door for being connected to an inside lock button, and an outer locking lever which has a second base portion rotatably mounted to the back plate by the supporting shaft and a second tip portion extending toward an exterior side of the door for being connected to a key cylinder. The supporting shaft has a large-diameter cylindrical part which supports the inner and outer locking levers, and a substantially annular flange which is integrally formed with the cylindrical part and has a plane surface perpendicular to an axis of the supporting shaft. The annular flange is located between the first base portion and second base portion.

Abstract: A vehicle door latch device comprises a latch body, a metal back plate fixed to a rear side of the latch body, a locking mechanism provided on the rear side of the latch body and displaceable between a locked condition and an unlocked condition. The locking mechanism has a main lock lever which has a base part rotatably mounted to the back plate and an inner part extending toward an interior side of the vehicle door so as to be connected to an inside lock button, and a sub lock lever which has a base part rotatably mounted to the back plate and an outer part extending toward an exterior side of the door so as to be connected to a key cylinder. The back plate has a protecting part located on a front side of the outer part of the sub lock lever so as to prevent the outer part of the sub lock lever from making contact with the main lock lever when the outer part of the sub lock lever is deformed.

Abstract: A vehicle door latch device comprises a synthetic resin latch body which has a recess at a front side thereof for receiving a latch and a ratchet, and a substantially horizontal bulged portion at a rear side thereof for receiving the striker when the door is closed. The latch device further comprises a door opening mechanism for releasing engagement between the latch and the so as to open the door and a locking mechanism displaceable between a locked condition and an unlocked condition. The door opening mechanism and the locking mechanism are located underneath the bulged portion. A protecting plate is attached to the rear side of the latch body for substantially covering the door opening mechanism. The protecting plate has an upper side edge which is adjacent to a lower surface of the bulged portion.