Abstract:
A non-motorized scooter with jumping drive device taking the advantages of scooter and pogo-stick. It has two models: 
       1 , It is designed for low-age kids with slow speed and easily to control the device; 
       2 , It is assembled an accelerator to increase moving speed which is for higher age kids. 
     A user can operate the device by standing on two peddles and jumping up and down to produce momentum moving forward.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    None. 
       FEDERALLY SPONSORED RESEARCH 
       [0002]    None. 
       SEQUENCE LISTING OR PROGRAM 
       [0003]    None. 
       BACKGROUND OF THE INVENTION 
       [0004]    1. The Field of the Invention 
         [0005]    The present invention relates to a novel jumping driving device especially for scooter type apparatus taking advantage of characteristics both scooter moving fast on the ground-level and pogo stick jumping up and down in the vertical direction. 
         [0006]    2. Description of the Prior Art 
         [0007]    Various scooter and pogo stick designs have been available for many years. Conventional scooters require the user to lift one foot from the scooter-board and down to the ground to kick back hard in order to get propulsion. It must be very tired for a longer riding. For pogo sticks, in addition, it can provide a exciting movement mode up and down by jumping for the user but it is greatly limited to move forward quickly. What is needed is a new improving design without such limitations. 
       SUMMARY OF THE INVENTION 
       [0008]    A Jumping Driving Device is designed for scooter type apparatus. It comprises a support rod provided with a front driving-leg and a rear driving-leg at its lower end. Two wheels are provided at each end of the front driving-leg and the rear driving-leg. A elastic thing links two lower parts of the front driving-leg and the rear driving-leg. One-way clutches are provided at each wheel. By the aid of elastic thing the user stands on foot-rests and can easily jumps up and down quickly. Just like man&#39;s side-walking, the two driving-legs would keep providing momentum alternately and the device moves forward. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]    Preferred embodiment of the present invention will be two wheels scooter type apparatus. Now it will be described with reference to drawings in which: 
           [0010]      FIG. 1  is a perspective view of present invention. 
           [0011]      FIG. 2  is a illustration of driving principle as two driving-legs contracting. 
           [0012]      FIG. 3  is a illustration of driving principle as two driving-legs separating. 
           [0013]      FIG. 4  is a illustration of steering system. 
           [0014]      FIG. 5  is a detail view of driving-leg turning-limiter shown in  FIG. 1 . 
           [0015]      FIG. 6  is a perspective view of preferred embodiment with two rear wheels. 
           [0016]      FIG. 7  is a perspective view of two driving-legs. 
           [0017]      FIG. 8  is detail back view of two rear wheels shown in  FIG. 6 . 
           [0018]      FIG. 9  is diagrams of one-way clutch. 
           [0019]      FIG. 10  is a perspective view of one-way clutch. 
           [0020]      FIG. 11  is a diagram of another type one-way clutch. 
           [0021]      FIG. 12  is other type of one-way clutch. 
           [0022]      FIG. 13  is a side view of second embodiment with gear-accelerator as two driving-legs contracting. 
           [0023]      FIG. 14  is a side view of second embodiment with gear-accelerator as two driving-legs separating. 
           [0024]      FIG. 15  is a detail side views of gear-accelerator. 
           [0025]      FIG. 16  is other side detail side view of gear-accelerator. 
           [0026]      FIG. 17  is a perspective detail view of gear-accelerator. 
           [0027]      FIG. 18  is a perspective view of second embodiment with gear-accelerator. 
           [0028]      FIG. 19  is a side view of third embodiment with pulling-accelerator as two driving-legs contracting. 
           [0029]      FIG. 20  is a side view of third embodiment with pulling-accelerator as two driving-legs separating. 
           [0030]      FIG. 21  is a perspective view of rear wheel with jumping-pulling device; 
           [0031]      FIG. 22  is a cross section view of rear wheel with jumping-pulling device; 
           [0032]      FIG. 23  is section view along line A-A in  FIG. 21 ; 
           [0033]      FIG. 24  is detail section view along line B-B in  FIG. 21 . 
           [0034]      FIG. 25  is a perspective view of third embodiment. 
           [0035]      FIG. 26  is a perspective view of fourth embodiment with pull-chain accelerator. 
           [0036]      FIG. 27  is diagram of pull-chain accelerator. 
           [0037]      FIG. 28  is detail view of friction drive wheel. 
           [0038]      FIG. 29  is a perspective view of fifth embodiment of scooter. 
       
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0039]    Referring first to  FIG. 1 : The device  10  includes:
   Support rod  11  includes upper part and lower part telescopically connected and locked by locker  13 .   Hand grips  12  secured to upper end of support rod  11 .   Brake lever  14  located proximally to hand grips  12  linking brake-shoe  142  by brake-wire  141 .   Steering fork  15  secured to lower end of support rod  11 .   Axle sleeve  21  rotatively connected to the lower part of support rod  11 .   Front bearings  22  and rear bearing  22   a  fixed to front side and back side of axle sleeve  21 .   Foot-rest  231  fixed to axle sleeve  21  by rod  23 .   Front driving-leg  31  rotatively connected at its upper end with front bearing  22 .   Front fork  41  rotatively mounted at lower end to front driving-leg  31 .   Front wheel  51  rotatively mounted on front fork  41 .   Rod  411  fixed to front fork  41 .   One-way clutch  52  provided to front wheel  51 .   Groove wheel  611  rotatively provided at outside of front bearing  22 .   Turning limiter  221  is formed at lower edge of front bearing  22 .   Rear driving-leg  31   a  rotatively connected at its upper end with rear bearing  22   a.      Rear fork  41   a  provided at lower end of rear driving-leg  31   a.      A synchronous device  311  comprises two fan-shaped gears provide at both upper ends of front driving-leg  31  and rear driving-leg  31   a  engaging each other.   Rear wheel  51   a  rotatively mounted on rear fork  41   a.      One-way clutch  52  provided to rear wheel  51   a.      Elasticity adjusting holes  312  are provided at lower parts of rear driving-leg  31   a.      Steering-wire  61  linked steering fork  15  and rod  411  via groove wheel  611 .   Elastic thing  71  linking both lower parts of front driving-leg  31  and rear driving-leg  31   a.      
 
         [0062]      FIG. 2 ,  3  illustrate driving principle. Elasticity of elastic thing  71  should be adjusted little smaller than weight of user. The user stands on foot-rests  231 , the device  10  would fall down and two driving-legs  31  and  31   a  will separate each other simultaneously till to be blocked by turning-limiter  221 . As the result of the work of one-way clutch  52 , rear wheel  51   a  would be locked and front wheel  51  together with the device  10  will be pushed forward in the direction shown as arrow A. 
         [0000]    When the user jumps up by the aid of elasticity of elastic thing  71 , front driving-leg  31  and rear driving-leg  31   a  will contract and front wheel  51  would reverse back but it is locked by one-way clutch  52  while rear wheel  51   a  will be released and pulled forward in the direction shown as arrow B. 
         [0063]      FIG. 4  shows work-mode of steering system. Turning hand grips  12 , steering fork  15  will be turn synchronously. Via steering-wire  61  and rod  411  leading by groove wheel  611  front wheel  51  will turn accordingly. 
         [0064]      FIG. 5  is a detail of turning-limiter  221  formed by part of lower edge of front bearing  22  bent inwards. 
         [0065]      FIG. 6  shows a perspective view of the preferred embodiment with two rear Wheels  51   a.    
         [0066]      FIG. 7  shows under the limit of synchronous device  311  front driving-leg  31  and rear driving-leg  31   a  only turn synchronously but in the opposite direction. 
         [0067]      FIG. 8  is a detail back view of embodiment shown in  FIG. 6  indicating rear fork  41   b  provided with two rear wheels  51   a  rotatively connected with axle  313  fixed to rear driving-leg  31   a.    
         [0068]      FIG. 9 ,  10  show structure of one-way clutch  52  which comprises ratchets  521  and check pawl  522  arranged one-side of hub  523 . Check pawl  522  always keeps in touch with ratchets  521  by a small spring (unshown in  FIG. 9 ,  10 ). While wheel  51  ( 51   a ) runs forward check pawl  522  would slide over teeth of ratchets  521 . While wheel  51  ( 51   a ) reverses ratchets  521  will be blocked by check pawl  522 . 
         [0069]      FIG. 11  shows another one-way clutch with ratchets  521  and check pawl  522  arranged inside of hub  523 . 
         [0070]      FIG. 12  is a other kind of one-way clutch. Teeth of ratchets  521  is arranged at flank of hub  523 . 
         [0071]    FIGS.  13 , 14  and  18  show second embodiment with gear-accelerator  20  at lower end of rear driving-leg  31   a.    
         [0072]      FIG. 15  is detail side view of gear-accelerator. A auxiliary wheel  51   b  provided in the front of rear wheel  51   a . A arc-rack  512  is formed along upper edge of bearing  511  rotatively mounted around rear axle  516 . One-way gear  513  engaged with arc-rack  512  is rotatively mounted on rear driving-leg  31   a.    
         [0073]      FIG. 16  shows other side view of accelerator. Chain-wheel  514  is secured to gear  513  by a axle and connected with free-wheel  517  secured to rear wheel  51   a  by chain  515 . 
         [0074]    When rear driving-leg  31   a  separating, it will turn forward around rear axle  516 , gear  513  will roll forward along arc-rack  512  and making itself rotating at the same time. Chain-wheel  514  will turn simultaneously and drive free-wheel  517  to turn secured to rear wheel  51   a  via chain  515 . 
         [0075]      FIG. 17  is a perspective detail view of gear-accelerator  20 . 
         [0076]      FIG. 18  is a perspective view of second embodiment with gear-accelerator. 
         [0077]      FIG. 19 ,  20  are side views of third embodiment with pulling-accelerator  30 . 
         [0078]      FIG. 21  is a perspective view of rear wheel  51   a  provided with pulling-accelerator  30 . Ratchet-ring  86  secured to wheel  51   a . Soft pull thing  81  can be pull out from spiral return groove  82  via groove  83  and reroll up back under elasticity of spiral return spring  84 . 
         [0079]      FIG. 22  is a cross section view of pulling-accelerator  30 . 
         [0080]      FIG. 23 ,  24  show working principle of pulling-accelerator  30 . Rear wheel  51   a  and spiral return spring groove  82  rotatively mounted to axle  87 . Spiral return spring  84  secured with one end to axle  87  and another end to spiral return spring groove  82 . Soft pull thing  81  secured to spiral return spring groove  82  and wind round it. While soft pull thing  81  is pull in the direction C out of spiral return groove  82 , spiral return groove  82  will turn along check pawl  85  at the direction of arrow D. Check pawl  85  is engaged with clutch teeth  86  secured to rear wheel  51   a  and make rear wheel  51   a  turning together at the direction of arrow E, providing momentum of moving forward. While two driving-legs  31  and  31   a  contract, soft pull thing  81  will be rerolled up by the elasticity of spiral return spring  84  via groove  83  and due to one-way clutch rear wheel  51   a  would not turn backwards together. 
         [0081]      FIG. 25  shows perspective view of third embodiment of the invention with pulling-accelerator  30 . 
         [0082]      FIG. 26  is a perspective view of fourth embodiment of the invention with pull-chain accelerator  40 . 
         [0083]      FIG. 27  is a diagram of pull-chain accelerator  40 . While front driving-leg  31  and rear driving-leg  31   a  apart each other, spring  71   a  will extend and pull-chain  531  would make chain-wheel  532  to turn. Accelerating-wheel  533  is secured to chain-wheel  532  and turns synchronously. Free-wheel  534  also turns driven by chain  535  connecting accelerating chain-wheel  533  and free-wheel  534  secured to rear wheel  51   a.    
         [0084]      FIG. 28  shows in model pull-chain accelerator, chain wheel  532  is replaced by friction drive wheel  532   a  with soft cable  531   a  around it. 
         [0085]      FIG. 29  is a perspective view of fourth embodiment of scooter with hand grips in the front. Elastic thing  71  provide under front and rear driving-legs  32  and  32   a . A rod  32   b  is provided below front driving-leg  32  parallelly. Front driving-leg  32  and rod  32   b  both joint with hinge axles  324  and  324   a  as well  325  and  325   a  forming parallelogram to keep axle sleeve  21   a  upright. 
         [0086]    Although preferred embodiment of the present invention has been shown in the foregoing specification, it will, of course, be understood that various modifications and changes may be made therein without departing from the invention. It is therefore, intended that the following claims cover all such modification and changes as may fall within the true spirit and scope of the present invention.