The invention discloses a stroller. A cam sliding block capable of moving up and down along a wheel shaft is arranged on the wheel shaft of each of front wheel assemblies, the bottom end surface of the cam sliding block is an annular cam surface of which one end is low and the other end is high in the radial direction of the wheel shaft, a limiting component for limiting the descending of the cam sliding block is arranged on the wheel shaft, and a tractive component and an elastic component are arranged on the corresponding wheel shaft so as to control the upward moving state and the downward moving state of the cam sliding block. When a vehicle frame is unfolded, the annular cam surfaces are positioned above the limiting components and separated from the limiting components, and the front wheel assemblies can rotate in universal directions; when the vehicle frame is folded, the cam sliding blocks descend so that the annular cam surfaces are abutted to the limiting components, the limiting components slide along the annular cam surfaces from low to high, so that the front wheel assemblies are driven to rotate around the wheel shafts, the front wheel assemblies turn over backwards and are close to the rear wheel assemblies, the structure of the folded vehicle frame is compact, and the size of the folded vehicle frame is effectively reduced.


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    Title :

    Stroller


    Contributors:
    DONG WEI (author) / GU XIAOCONG (author)

    Publication date :

    2015-12-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62B Von Hand bewegte Fahrzeuge, z.B. Handkarren oder Kinderwagen , HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS



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