Abstract:
The present invention, relating to a safety driving equipment for a scooter, includes a twister member with a supporting arm at the end thereof opposite to the driving wheels. A universal safety wheel is mounted at the free end of the supporting arm and a transmission unit is extended to connect the twister member at a position between the safety wheel and the driving wheels. The safety wheel is capable of efficiently providing an increased safety area while the scooter in wobbling mainly to maintain the force center shifting within the safety area.

Description:
BACKGROUND OF THE PRESENT INVENTION  
         [0001]    1. Field of Invention  
           [0002]    The invention herein relates to a safety driving equipment for a toddler&#39;s scooter, mainly to provide an auxiliary wheel, relative to the rear wheels of the scooter body, to the driving structure of a toy scooter to increase the safety area and regulating the location of the force center.  
           [0003]    2. Description of Related Arts  
           [0004]    As shown in FIG. 1, the side elevation isometric drawing of a conventional scooter structure comprises a scooter body  1 , mounted with live left and right wheels  31 ,  32  at the rear side; in the front, one vertically disposed shaft level  11  with handbars  12  connected on the top and a driving triangular base  2  fastened at the bottom mounted with left and right rear driving wheels  21 ,  22 ; the rider straddled on the scooter body  1  turns the handbars  12  by hands to drive the triangular base  2  connected through the shaft level  11 , thereby to move the left and the right driving wheels  21 ,  22  alternatively to achieve the function of wobbling movement in actuation.  
           [0005]    Referring to FIGS. 2 and 3, as shown in the bird&#39;s eye view, the driving triangular base  2  centered by the shaft level  11  moves to the left or the right sides to enable the left and the right driving wheels  21 ,  22  to achieve the purpose of actuate approach alternatively; furthermore, as the force center W on the triangular base swings in a gear arc, the force center W will define a safety area A, usually at one of the auxiliary wheel on the driving triangular base and relative to the left rear wheel  31  or the right rear wheel  32 ; if the force center W locates within the safety area A, the scooter body will not flip over; while moving in a fast speed, the handbars  12  operated by hands will generate a reaction force which will make the force center W to receive a pulling force and shift its position; if the reaction force exceeds a certain degree (while the handbars are forcefully operated) and accelerates by the inertia force generated from the mass of the human body in a fast proceeding speed, the force center W will easily move beyond the safety area A and causes the danger of having the scooter body tumble forward and oblique; just as shown in the Figures, while moving the scooter by operating the shaft level  11  through the handbars  12 , the triangular base  2  will deviate to right or left due to the generated reaction force and adding in the proceeding inertia of driving, the force center W will usually exceed the congruent sides of the triangular safety base; therefore, scooters similar to this kind tend to flip over.  
           [0006]    Moreover, since the left and the right driving wheels  21 ,  22  are located close to a mid-portion of the scooter body  1 , a head portion of the scooter body  1  is suspended with respect to the ground. Therefore, the scooter will easily be flipped over from the front especially when external force is exerted on the front portion of the scooter body  1  such as hitting to a curb or crossing a bump. Besides, when the rider sits close to a rear portion of the scooter body  1 , which is also suspended with respect to the ground, the scooter will be flipped over from the back easily.  
           [0007]    It is unreasonable to let a young child in a risky or unsafe situation. However, we have to tolerate the above mentioned suffering drawbacks until an improved scooter that can provide an absolutely safe for the rider to play with the scooter is developed.  
         SUMMARY OF THE PRESENT INVENTION  
         [0008]    A main object of the present invention is to provide a safety driving equipment for scooter, which can provide an absolutely safe scooter structure for a rider to avoid any unwanted flipping manner of the scooter.  
           [0009]    Another object of the present invention is to provide a safety driving equipment for scooter, which comprises a safety wheel rotatably extended from a driving mechanism for supporting a front portion of the scooter body, so as to prevent the scooter body being flipped over from the front thereof.  
           [0010]    Another object of the present invention is to provide a safety driving equipment for scooter, which comprises an anti-flip member affixed to a rear portion of the scooter body for reducing a vertical clearance between the rear portion of the scooter and the rear wheels, so as to avoid the scooter being flipped over from the back thereof.  
           [0011]    Another object of the present invention is to provide a safety driving equipment for scooter, wherein the two rear wheels are further extended far apart from the scooter body for increasing the safety area of the scooter, so as to prevent the scooter being flipped over from the sides thereof.  
           [0012]    Another object of the present invention is to provide a safety driving equipment for scooter, wherein no expensive or complicate mechanical structure is required to employ in the present invention in order to achieve the above mentioned objects. Therefore, the present invention successfully provides an economic and efficient solution for preventing the scooter being flipped over easily.  
           [0013]    Specifically, the invention herein is consisted of an extended arm at the end relative to the driving wheels of the driving wheels of the driving mechanism; and a safety wheel capable of making universal rolling mounted lively at the end of the wheel arm. The driving mechanism is driven by a steering wheel through a transmission unit. Therefore, by moving around based on the transmission unit as the center and utilizing the relationship of the safety wheel relative to the rear wheels of the scooter body to increase the possibility of locating the force center in the regulated safety area.  
           [0014]    To enable a further understanding of the objectives, the technological methods and the efficiency of the invention herein, the brief description of the drawings below is followed by detail description of the preferred embodiment.  
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0015]    [0015]FIG. 1 is a side elevation drawing of a conventional scooter.  
         [0016]    [0016]FIG. 2 is an isometric drawing of the deviated force center on the conventional scooter in wobbling.  
         [0017]    [0017]FIG. 3 is a second isometric drawing of the deviated force center on the conventional scooter in wobbling.  
         [0018]    [0018]FIG. 4 is a perspective view of a driving mechanism of a safety driving equipment for a scooter according to a first preferred embodiment of the present invention.  
         [0019]    [0019]FIG. 5 is a side view of the scooter incorporated with the safety driving equipment according to the above first preferred embodiment of the present invention.  
         [0020]    [0020]FIG. 6A is a bottom view of the scooter incorporated with the safety driving equipment according to the above first preferred embodiment of the present invention, illustrating the driving mechanism being turned in one direction.  
         [0021]    [0021]FIG. 6B is a bottom view of the scooter incorporated with the safety driving equipment according to the above first preferred embodiment of the present invention, illustrating the driving mechanism being turned in another direction.  
         [0022]    [0022]FIG. 7 is a bottom view of the scooter incorporated with the safety driving equipment according to the above first preferred embodiment of the present invention, illustrating the scooter being moved backward.  
         [0023]    [0023]FIG. 8 is a perspective view of a driving mechanism of a safety driving equipment for a scooter according to a second preferred embodiment of the present invention.  
         [0024]    [0024]FIG. 9 is a side view of the scooter incorporated with the safety driving equipment according to the above second preferred embodiment of the present invention.  
         [0025]    [0025]FIG. 10 is a perspective view of a rear wheel of the scooter incorporated with the safety driving equipment according to the above second preferred embodiment of the present invention. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0026]    Referring to FIGS. 4 through 7 of the drawings, a scooter incorporated with a safety equipment according to a first preferred embodiment of the present invention is illustrated. The scooter, such as a conventional scooter, comprises a scooter body  1 , a pair of rear wheels  31 ,  32  rotatably supported at a rear portion of the scooter body  1 .  
         [0027]    The scooter further comprises a transmission unit  11  having an upper control portion positioned above the scooter body  1  and a lower connecting portion extended underneath the scooter body  1 , a steering means  12  affixed to the control portion of the transmission unit  11  for driving the connecting portion thereof to rotate in clockwise and anti-clockwise directions, a twister member  2  having a driven portion connected to the connecting portion of the transmission unit  11 , and a pair of driving wheels  21 ,  22  spacedly and rotatably mounted to the twister member  2  wherein the two driving wheels  21 ,  22  are spaced apart from the driven portion of the twister member  2 . Therefore, in order to drive the scooter, a rotating force must be applied on the steering means  12  to drive the twister to rotate in a clockwise and anti-clockwise manner.  
         [0028]    The safety driving equipment comprises a supporting arm  23  frontwardly extended from the driven portion of the twister member  2  and a safety wheel  24  rotatably connected to a free end of the supporting arm  23  for supporting a front portion of the scooter body  1 , so as to prevent the scooter from being flip over from the front thereof.  
         [0029]    According to the preferred embodiment, the scooter body  1  has a receiving cavity wherein the two rear wheels  31 ,  32  are received therein via a wheel axle. In other words, the two rear wheels  31 ,  32  are operated within the receiving cavity of the scooter body  1 .  
         [0030]    Referring to FIG. 4, to prevent the problem of having the tendency to flip over of the conventional scooter, the supporting arm  23  is extended from the twist base  2 . The safety wheel  24  is capable of making universal rolling mounted at the end of the supporting arm  23  and relative to the center forward position of the driving wheels  21 ,  22 . Therefore, while the steering means  12  is operated to drive, through the center point defined by the transmission unit  11 , as shown in FIG. 5, to make the twister member  2  to swing right and left, and also through the transmission unit  11  to gear the driving wheels  21 ,  22  to proceed actuately to left or right.  
         [0031]    According to the preferred embodiment, the steering means  12  comprises at least a hand bar which functions as a steering wheel for a rider to drive the twister member  2  to rotate wherein the steering means  12  is capable of not only moving the scooter forwardly or backwardly but also directing the course of the scooter.  
         [0032]    The transmission unit  11  is a shaft having a top end which is the driving portion of the transmission unit  11  connected to the steering means  12  and a bottom end which is the connecting portion of the transmission unit  11  connected to the twister member  2  wherein the transmission unit  11  is rotatably penetrated through the scooter body  1  in such a manner that the steering means  12  is arranged to drive the twister member  2  to rotate when a rotating force is applied on the steering means  12 .  
         [0033]    As shown in FIG. 4, the twister member  2  having a triangularly shaped, preferred isosceles triangularly shaped, has a front end portion which is the driven portion and two rear side portions rotatably affixed the two driving wheels  21 ,  22  thereto respectively. In other words, the two driving wheels  21 ,  22  have the same distance from the driven portion of the twister member  2 . Therefore, due to the movement of the two driving wheels  21 ,  22  with respect to the driven portion of the twister member  2 , the scooter is adapted for moving forwardly and backwardly. It is worth to mention that for moving the scooter forward, the driven portion of the twister member  2  is positioned in front of the two driving wheels  21 ,  22 , and for moving the scooter backward, the driven portion of the twist member  2  is positioned behind the two driving wheels  21 ,  22 .  
         [0034]    Accordingly, the supporting arm  23  is integrally extended from the twister member  2  at the driven portion thereof and has a free end for rotatably connecting to the safety wheel  24 .  
         [0035]    The safety wheel  24 , which is a free rotating wheel, comprises a vertical axle affixed to the supporting arm  23  and a wheel casing rotatably attached to a bottom end of the vertical axle and rotatably received a ball shaped rotating wheel in the wheel casing such that the safety wheel  24  is adapted to self-rotating 360 degrees with respect to the free end of the supporting arm  23 . Therefore, when the twister member  2  is driven to rotate, the safety wheel  24  is capable of rotating with respect to the twister member  2 , so as to prevent the safety wheel  24  being stunk when operating the scooter. The wheel casing further comprises a ball bearing encirclingly mounted thereto for enhancing the rotating wheel in a free rotating manner. Since the safety wheel  24  is frontwardly extended from the twist member  2  for supporting a front portion of the scooter body  1 , the scooter will not be flipped over from the front thereof.  
         [0036]    As shown in FIG. 5, the scooter further comprises an anti-flip member  40  integrally extended from a bottom side of the rear portion of the scooter body  1  for reducing a vertical clearance between the scooter body  1  and the rear wheels  31 ,  32 . As it is mentioned in the background, the rear portion of the scooter body  1  is suspended with respect to the ground, which may cause the scooter flipped over. Therefore, the anti-flip member  40  can reduce the distance between the scooter body  1  and the ground so as to prevent the scooter from being flipped over from the back thereof.  
         [0037]    Referring to FIGS. 6A and 6B, since there is the safety wheel  24  mounted lively at the end of the back of the supporting arm  23  on the twister member  2 , if the scooter body  1  makes more obvious bounce during the proceeding movement, the safety wheel  24  will allow the forward touching point fall directly on the safety wheel  24 . Also, as shown in FIG. 6, if the gravity force of the whole scooter body  1  leaning forward falls on the safety  24 , the safety wheel  24  relative to the two rear wheels  31 ,  32  mounted on the rear sides of the scooter body  1  will immediately define a larger triangular safety supporting area A, just as the force center W shown in FIGS. 2 and 3, (with the same movement, the deviating position will be the same), the force center W will be regulated within the larger safety area A, even when the steering means  24  is operated to deviate to the right, as shown in FIG. 7, the safety wheel  24  relative to the rear wheels  31 ,  32  will as well define a larger safety area A allowing the force center W to be regulated to shift within the safety area A. Therefore, protecting the scooter from the danger of flipping over, by means of the safety wheel  24  mounted at the end of the supporting arm  23  on the twister member  2  to efficiently enlarge the access to the safety area even if the force center deviates. Furthermore, the safety wheel  24  is a universal wheel, so either because of automatic movement, under force or wobbling operation, the safety wheel  24  will move along to any direction without encountering the obstacle caused by the angle of proceeding; basically, to have the safety wheel  24  with the height from the ground higher than that of the driving wheels  21 ,  22  and the safety wheel  24  cooperating in time with the rear wheels  31 ,  32  to form a larger safety area when the scooter body  1  bounces obviously during properly and efficiently achieves the safety purpose.  
         [0038]    In order to drive the scooter forwardly, the driven portion of the twister member  2  must be positioned in front of the two driving wheels  21 ,  22 , as shown in FIGS. 6A and 6B, in such a manner that when a clockwise rotating force and an anti-clockwise rotating force are subsequently applied on the steering means  12 , the twister member  2  is driven to rotate in clockwise and anti-clockwise directions, so as to drive the scooter forward. When the driven portion of the two driving wheels  21 ,  22  are positioned in front of the twister member  2 , as shown in FIG. 7, the scooter is driven to move backward by the above mentioned operation.  
         [0039]    Furthermore, the length of the supporting arm  23  is better limited within the outer rim of the scooter body. If too long, the burden of operation the wobble will be affected; if too short, then there is no functional meaning. In fact, the length should be the diameter of the actute movement of the safety wheel  24  no longer than the wheel base between the two rear wheels  31 ,  32 .  
         [0040]    Referring to FIG. 8 of the drawings, a second embodiment illustrates an alternative mode of the above first embodiment of the present invention. According to the second embodiment, supporting arm  23 ′ is securely attached to the connecting portion of the transmission unit  11 ′. The supporting arm  23 ′ comprises a tubular sleeve  231  ′ for the connecting portion of the transmission unit  11  ′ passing through, a connecting member  232 ′ having a vertical slot for connecting the safety wheel  24 ′, and a pair of parallel extending members  233 ′ extended between the tubular sleeve  231 ′ and the connecting member  232 ′.  
         [0041]    As shown in FIG. 9, the anti-flip member  40 ′ having an arc shaped is affixed to the bottom side of the rear portion of the scooter body  1 ′. In other words, the anti-flip member  40 ′ can be manufactured individually to attach to the conventional scooter so as to provide an anti-flip purpose for the scooter.  
         [0042]    In order to reduce the size of the scooter, the scooter body  1 ′ can be shaped slimly. However, the rear wheels  31 ,  32  are received in the receiving cavity of the scooter body  1  in the first embodiment. When reducing the width of the scooter body  1 , the width of the rear wheels  31 ,  32  will be reduced as well, which may cause the scooter flipped over sidewardly.  
         [0043]    In order to lengthen the distance between the two rear wheels  31 ′,  32 ′, the scooter body  1 ′ further comprises a pair of wheel arms  51 ′,  52 ′ outwardly extended from two sides of the scooter body  1 ′ for rotatably connecting the two rear wheels  31 ′,  32  respectively. As shown in FIG. 10, each of the wheel arms  51 ′,  52 ′ has first end securely affixed to the respective side of the scooter body  1 ′ and a second end having an elongated cavity for rotatably mounting the respective rear wheel  31 ′,  32 ′ via an axle. Therefore, the distance between the two rear wheels  31 ′,  32 ′ will be increased by the width of the scooter body  1 ′ and lengths of the wheel arms  51 ′,  52 ′ for enhancing the stabilization of the scooter so as to prevent the scooter from being flipped over sidewardly.  
         [0044]    Therefore, the invention herein provides a safety driving equipment for the scooter and meets new patent application requirements and is hereby lawfully submitted to the patent bureau for review and the granting of the commensurate patent rights.