Improved impact resistant vehicle door latch device

摘要

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.