Convertible animal toy
BACKGROUND OF THE INVENTION 
     The present invention relates in general to toys and, in particular, to a new and useful convertible toy. 
     In the present market, various walking animal toys can be found which, however, are only capable of walking straight forward and are thus quickly considered dull. The condition whereby these toys can only walk in a straight path originates from the fact that walking for an animal requires an accurate timing and a synchronous transmission of its four limbs and thus is more complicated and difficult than the movement of a wheeled toy. The present invention is an improvement on, and diversification of the known walking animal toys. 
     SUMMARY OF THE INVENTION 
     According to the present invention, an animal toy is made capable of turning by mounting two universal joints on a front shaft thereof. The toy is convertible by the fact that its four limbs are detachable and can be replaced by four normal wheels so that a car shaped like the animal, is obtained. 
     It is therefore a main object of the present invention to provide a convertible animal toy which is capable of going forward, backward and turning, and which is convertible from an animal to a car and back again. 
     This and other objects of the present invention may become apparent through the following description with reference to the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     In the drawings: 
     FIG. 1 is an exploded view showing a toy body of a preferred embodiment of a convertible animal toy according to the present invention; 
     FIG. 2 is an assembled view showing a toy body of a convertible animal toy according to the present invention; 
     FIG. 3 is a perspective view showing a turning support of the convertible animal toy; 
     FIG. 4 is a sectional view showing a leg-like piece of the convertible animal toy; 
     FIG. 5 is a perspective view showing a leg-like piece according to the convertible animal toy; 
     FIG. 6 is a sectional view showing a wheel to be used in the convertible animal toy; 
     FIG. 7 is a perspective view showing the wheel of FIG. 6; 
     FIG. 8 is a side view showing the convertible animal toy in its first configuration; and 
     FIG. 9 is a side view showing the convertible animal toy in its second configuration. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring now to FIG. 1, the toy body comprises a lower housing 10 and an upper housing 20. A rear shaft 12 is driven through a reduction gear assembly 11 by one or two small 12 V motors, depending on horsepower, to rotate at about 20 rpm. The motor or motors are in the assembly 11 and thus not visible in FIG. 1. Since the present toy is meant for riding, it requires a large speed reduction. The modulus for the teeth of the gears in the gear assembly 11 must be large in order to avoid the breakage or jumping of a tooth. In order to achieve the desired speed reduction and increase the reduction ratio, the outer diameter of the gear must be increased since its modulus is also large. In order to reduce the volume of the gear and save space in reduction gear assembly 11, it is preferable to use two motors each including three sets of main gears and several smaller gears for simultaneously driving two ultimate gears of larger modulus, the final gear in each motor set having the function of a spring clutch and thus being a safety gear. 
     Two symmetrical mountings 13 having eccentric projections 131 in phase opposition to each other, are secured to the two ends of rear shaft 12. a bevel gear 14 is mounted at an intermediate position on shaft 12 for driving a geared shaft 15, which includes at the two ends thereof, matching bevel gears 14. Shaft 15, in turn, drives a front shaft 16, which includes at the two ends thereof, mountings 18, having eccentric projections 181 in phase opposition to each other. Two universal mounts or joints 17 are connected respectively inside the mountings 18 and to the front shaft 16. Each projection 181 is in phase opposition to the projection 131 located at the same side of the lower housing 10. Thus, on each side of housing 10, projection 131 is rotated 180° out of phase with projection 181. 
     As shown in FIG. 2 and 3, the assembled toy body includes the lower housing 10 and the upper housing 20, which are connected to each other. A turning mechanism is connected to the front of the toy body which includes turning supports 21, which are each in the form of a case that is open toward the interior of the toy body and is provided at the top surface thereof with a pivot 211 and a shaft 212, and at the bottom surface thereof with a corresponding pivot 211. An outer surface or wall of each case 21, has a hole 214 and a rod projection 213. 
     A sliding piece 24 is slidably guided in a groove 202 of the upper housing 20. Two connecting pieces 23 respectively connect supports 21 to sliding piece 24. A securing plate 25 holds sliding piece 24 in its groove and a turning handle 26 is engaged with a projection 241 of sliding piece 24. Pivots 211 of support 21 are respectively rotatably received in an upper fixing plate 22 and a lower fixing plate 101. 
     Each end of front shaft 16, which carries mounting 18, passes through one of the holes 214 and connects to one of the universal joints 17. Thus, when the projection 241 of sliding piece 24 is moved transversely with respect to the toy body, by turning handle 26, connecting pieces 23 and turning supports 21 will pivot, thus steering mountings 18. Mountings 18 can still rotate, however, through the universal joints 17. Since the open sides of supports 21 face inwardly and at least partly enclose the universal joints 17, the joints will not harm the rider and thus are safe for use. The present toy can use 12V which is supplied by two batteries 19 connected in series and located in an intermediate portion of the toy body. 
     As shown in FIGS. 4 and 5, each projection 181 (131) is inserted into an upper central hole of a leg-like piece 29 having a guiding groove 291 for receiving and guiding the rod projection 213 of an adjacent support 21. Each projection 181 has a threaded end 182 and a nut 27, so that leg-like piece 29 will thus execute a walking action in an elliptic manner as eccentric projection 181 rotates. In order to be capable of being easily moved upon being unloaded and to avoid damage to the legs, the bottom of each of the legs 28 is provided with a spring and a wheel 28 which is totally received in a bottom recess of the leg when the toy body is loaded with a weight that is heavier than 10 kg. When the toy body is unloaded or loaded by a weight lighter than 10 kg., the animal toy can no longer walk and can only be moved by the rotation of wheels 28. Through this provision, the toy can easily be moved upon being under-loaded and a child having a weight no more than 10 kg. cannot cause it to walk. This is to prevent him from falling or being in danger. 
     As shown in FIGS. 6 and 7, a wheel 30 having a recess 301, which matches the projection 181 and is coaxially mounted on mounting 18, is provided and rotates in circular motion when mounting 18 rotates. In order to prevent rod projection 213 from obstructing this rotation of wheel 30, a portion of wheel 30 is hollowed to freely receive rod projection 213 and allow free rotation of wheel 30. 
     The structure shown can inherently walk with legs 29 or roll on wheels 30, forwardly or rearwardly, simply by reversing the rotation of the motors. 
     As shown in FIGS. 8 and 9, the toy of the invention is provided with a saddle 33, a control switch 32, a direction handle 31 for steering turning handle 26, and two pedals 34. The toy is capable of going forward, backward and turning, and of being converted to an animal or car. 
     The head and tail can also be detached from the body.