Patent ID: 7530245

Claim:
A door lock, comprising outer assemblies, latch assemblies and inner assemblies including a turning switch, fixing bolts, an interior rose and a detent device, wherein the detent device comprises: an inner plate including a guiding track projected from a surface of an upper portion thereof, a stop plate including an opening at a lower portion thereof, a protruding member perpendicular to the stop plate at a middle portion thereof, and elongated protrusions corresponding to the guiding track at an upper portion thereof, thereby making the stop plate capable of sliding along the guiding track up and down; a stop seat, a hollow stepped cylinder, including a front cylinder having a positioning surface disposed at a front surface thereof, a protruding block disposed at the edge thereof, and a spring holding member projected axially from the edge thereof on the opposing side to the protruding block; a rotating spring engaged with the stop seat and including two ends formed with a spring arm respectively and disposed at both sides of the spring holding member respectively; a retaining spring disposed in a hollow portion of the stop seat and engaged with a revolving axis of the turning switch together with the stop seat, and a sprag pressed on the retaining spring for fixing and positioning the retaining spring.