Car door lock door knife with rocker and pressure spring

The utility model discloses a car door lock knife with a rocker pressure spring, which belongs to the field of car door lock knives and comprises a door knife back plate riveting component, a right knife arm component and a lock hook component are arranged at the front end of the door knife back plate riveting component, a connecting rod component is arranged on one side of the right knife arm component, a short connecting rod component is arranged below the connecting rod component, and a rocker pressure spring is arranged below the short connecting rod component. A left cutter arm assembly is arranged at the front end of the lock hook assembly. By means of the arrangement in the flat layer unlocking area, people in the elevator car can push the door for self rescue. A compression spring is additionally arranged between a door knife back plate and a door knife rocker assembly to achieve the function that people in a non-flat-layer lift car cannot open a car door, and the power-off knife opening function is a