Patent ID: 8485546

Claim:
A foldable baby stroller frame, comprising: a collapsible wheeled frame, having at least a front strut, a pair of rear struts, and a lockable swivel base having a vertical shaft hole and being pivotally connected with the front strut and the rear struts; the lockable swivel base including an abutting slider biased by a resilient member for fixing the front strut and the rear struts in a using configuration; a foldable upper frame being pivotally connected with and supported by the lockable swivel base, and comprising a swivel rack having an U-shaped arm with two distal ends and a vertical shaft pivotally inserted and connected in the vertical shaft hole, a push arm for pushing the baby stroller frame, and a joint lockably connected between the swivel rack and the push arm; and a release mechanism operatably mounted on the foldable upper frame for releasing the front strut and the rear struts from the using configuration to a folded configuration.