Auxiliary structure for stabilizing a rock-and-roll play cart

A rock-and-roll play cart wherein an auxiliary wheel is provided in a front wheel frame so as to prevent the overturn of the play cart at such time when the play cart is tilted.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT As shown in FIGS. 2 - 4 , a rock-and-roll play cart embodied in the present invention comprises a seat 10 , a body frame 11 on which the seat 10 is mounted, two rear wheels 12 pivoted to two opposite ends of the rear end of the body frame 11 , an upright steering rod 13 fastened with the front end of the body frame 11 , a handlebar 14 supported by the top end of the upright steering rod 13 , a front wheel frame 15 fastened with the bottom end of the upright steering rod 13 , and two front wheels 16 pivoted to two opposite ends of the rear end of the front wheel frame 15 . The rock-and-roll play cart of the preferred embodiment of the present invention is characterized by the front wheel frame 15 which is provided with an auxiliary wheel 20 pivoted thereto. The auxiliary wheel 20 is fastened pivotally to the front end of the front wheel frame 15 such that the auxiliary wheel 20 is not in contact with a surface on which the play cart of the present invention is rested by means of the two rear wheels 12 and the two front wheels 16 . In other words, only the rear wheels 12 and the front wheels 16 are in contact with the surface. As the play cart is moved forward, the auxiliary wheel 20 does not come in contact with the surface on which the play cart is moved, as shown in FIG. 4 . When the play cart of the present invention is tilted, the auxiliary wheel 20 comes in contact with the surface, thereby resulting in an auxiliary support to the tilted play cart, as illustrated in FIGS. 5 and 6 . The auxiliary wheel 20 plays the role of preventing the overturn of the play cart of the present invention, especially at the time when the play cart of the present invention is engaged in a rock-and-roll movement. The embodiment of the present invention described above is to be regarded in all respects as being merely illustrative, and not restrictive. Accordingly, the present invention may be embodied in other specific forms without deviating from the spirit thereof . The present invention is therefore to be limited only by the scope of the following appended claim.