Patent ID: 8657325

Claim:
A stroller, comprising: a foldable stroller skeleton; a front-wheel assembly connected to the foldable stroller skeleton; a rear-wheel assembly connected to the foldable stroller skeleton; a frame connected to the foldable stroller skeleton; an assistant wheel pivotally connected to the frame for being capable of contacting a ground by cooperating with the rear-wheel assembly as the frame approaches the rear-wheel assembly by rendering the foldable stroller skeleton folded, and an installing base having a front end fixed to the frame, a rear end rotatably connected to the assistant wheel, an engaging slot formed on the front end thereof and a containing slot formed on the rear end thereof, the installing base being fixed to the frame by rendering the frame engaged inside the engaging slot, and the assistant wheel being rotatably connected to the installing base and having a portion accommodated inside the containing slot and another portion protruding outside the containing slot.