Abstract:
A driver for a bicycle dynamo connected to the dynamo includes a first driven wheel ( 132 ) and a second wheel ( 136 ) driving the first wheel ( 132 ). The first wheel ( 132 ) is mounted on the dynamo. A first magnetic area is set on the surface of the first wheel ( 132 ). The second wheel ( 136 ) is arranged in a distance from the first wheel ( 132 ). A second magnetic area ( 137   a ) is set on the second wheel ( 136 ). The second magnetic area ( 137   a ) is opposite to the first magnetic area ( 134 ). When the second wheel ( 136 ) is rotated by a user through the pedal, the second magnetic area ( 137   a ) rotates. The magnetic force generated between the second magnetic ( 137   a ) and the first magnetic ( 134 ) drives the first magnetic area ( 134 ) rotating to drive the dynamo connected to the first wheel working.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a driver device, particularly to a driver device for a bicycle dynamo. 
         [0003]    2. Description of the Related Art 
         [0004]    Usually, typical bicycles equip with no lighting or warning device, so some traffic accidents readily happen while drivers are not familiar with the road condition or while the bicycle itself cannot be clearly recognized at night. Accordingly, bicycles with lighting or warning devices are invented to solve the aforementioned problems. 
         [0005]    However, radiating members in the lighting or warning devices are mostly electrically driven by batteries. Apparently, such radiating means is considered the wasteful energy and does not comply with today&#39;s concept of environmental protection. Therefore, the application of batteries to radiate obviously departs from the practical demand in the future market. 
         [0006]    In other aspect, there are means developed for generating electric power by a frictional physic contact, such as incessantly rubbing objects. In this manner, the lighting device is favorably provided with electricity. However, with such radiating means, the wheels of the bicycle are facilely worn out. In addition, drivers have to apply more strength during riding. Thus, this kind of development does not conform to the practical need. 
         [0007]    As a result, an improved radiating device for lighting and warning should be developed to deal with the questions of the conventional radiating device, such as wasting battery energy and inconsistency with the concept of environmental protection. 
       SUMMARY OF THE INVENTION 
       [0008]    Therefore, the objective of the present invention is to offer a driver device for a bicycle dynamo that efficiently enhances the using rate of energy, thereby concurrently diminishing the wastage of batteries and remedying those conventional environmental drawbacks. 
         [0009]    The driver device for a bicycle dynamo in accordance with the present invention essentially comprises a first driven wheel that is rotated and installed on a spindle of the dynamo. Wherein, at least one first magnetic areas are defined on a surface of the first driven wheel. 
         [0010]    A second driven wheel for driving the first driven wheel is spatially disposed relative to the first driven wheel; wherein, at least one second magnetic area is defined on a surface of the second driven wheel for being disposed relative to the first magnetic area. 
         [0011]    A plurality of first magnetic areas are disposed on the surface of the first driven wheel, and the first magnetic areas could be all arranged by either the north magnetic pole or the south magnetic pole. 
         [0012]    A plurality of first magnetic areas are disposed on the surface of the first driven wheel, and the first magnetic areas could be grouped into the north magnetic pole and the south magnetic pole. 
         [0013]    A plurality of the second driven wheel are disposed on the surface of the second driven wheel, and the second magnetic areas could be all arranged by either the north magnetic pole or the south magnetic pole. 
         [0014]    A plurality of second magnetic areas are disposed on the surface of the second driven wheel, and the second magnetic areas could be grouped into the north magnetic pole and the south magnetic pole. 
         [0015]    The second magnetic area is disposed in the face of the first magnetic area. 
         [0016]    A moving path of the second magnetic area is disposed in the face of the first magnetic area. 
         [0017]    The second magnetic area is disposed in the face of a moving path of the first magnetic area. 
         [0018]    A moving path of the second magnetic area is disposed in the face of a moving path of the first magnetic area. 
         [0019]    Whereby, a set of wheels is provided in the driver device for generating magnetism. By means of the repulsive force and the attractive force provided by the magnetism, the kinetic energy would be transmitted to the dynamo without contact for further generating electricity while the bicycle is ridden. Accordingly, in view of the transmission of energy via the non-contacted magnetism, the consumption of energy would be lost during the transmission for efficiently advancing the usage of applicable energy. 
         [0020]    Further, the magnetic driver is installed on the dynamo, so the provided kinetic energy could be transferred to the dynamo for generating electricity. Whereby, the radiating device could illuminate when it receives the current. Therefore, additional batteries are not needed. Concurrently, the drawbacks of wastage of batteries and lack of environment protection are corrected. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0021]      FIG. 1  is a side view showing a first preferred embodiment of the present invention with a radiating system; 
           [0022]      FIG. 2  is a side view showing a driver device for a dynamo of the present invention with the radiating system in  FIG. 1 ; 
           [0023]      FIG. 3  is a side view showing an arrangement of a moving path of a second magnetic area disposed relative to a moving path of a first magnetic area in  FIG. 1 ; and 
           [0024]      FIG. 4  is a side view of a spindle of the driver device being detachable for installing on a spindle of the dynamo in  FIG. 1 . 
       
    
    
     DESCRIPTION OF ELEMENTS IN THE DRAWINGS 
       [0025]      
         [0000]    
       
         
               
               
               
             
           
               
                   
                   
               
             
             
               
                   
                 100 
                 bicycle 
               
               
                   
                 110 
                 radiating device 
               
               
                   
                 120 
                 dynamo 
               
               
                   
                 122 
                 spindle 
               
               
                   
                 130 
                 driver device 
               
               
                   
                 132 
                 first driven wheel 
               
               
                   
                 132a 
                 first spindle 
               
               
                   
                 132b 
                 first turntable 
               
               
                   
                 133 
                 central line 
               
               
                   
                 133a 
                 first side portion 
               
               
                   
                 133b 
                 first end portion 
               
               
                   
                 134 
                 first magnetic area 
               
               
                   
                 136 
                 second driven wheel 
               
               
                   
                 136a 
                 second spindle 
               
               
                   
                 136b 
                 second turntable 
               
               
                   
                 137 
                 central line 
               
               
                   
                 138 
                 second magnetic area 
               
               
                   
                 137a 
                 second side portion 
               
               
                   
                 137b 
                 second end portion 
               
               
                   
                 138 
                 second magnetic area 
               
               
                   
                 150 
                 pedal 
               
               
                   
                   
               
             
          
         
       
     
       DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0026]    Referring to  FIGS. 1 and 2  respectively show a side view of a driver device for a bicycle dynamo  100  and a side view of the driver device  130  of the dynamo  120 . Wherein, the driver device for a bicycle dynamo  100  comprises a radiating device  110 , a dynamo  120 , and a driver device  130 . Whereby, the dynamo  120  connects to the radiating device  110  for providing the radiating device  110  with electricity; the driver device  130  connects to the dynamo  120  for providing the dynamo  120  with kinetic energy, so that the dynamo  120  is able to generate electricity. The driver device  130  includes a first driven wheel  132  and a second driven wheel  136  that drives the first driven wheel  132 . Herein, the first driven wheel  132  is installed on the dynamo  120 , and the second driven wheel  136  is installed relative to the first driven wheel  132  by a distance, so that the second driven wheel  136  would thence trigger the first driven wheel  132  via a non-touchable way. A first magnetic area  134  with a first magnetism (like a north magnetic pole or a south magnetic pole) is defined on a surface of the first driven wheel  132 ; a second magnetic area  138  with a second magnetism (like a north magnetic pole or a south magnetic pole) is defined on a surface of the second driven wheel  136 . Moreover, the second magnetic area  138  is disposed relative to the first magnetic area  134 . As a note, the magnetism could be accordingly generated between the second magnetic area  138  and the first magnetic area  134  as a result of the second magnetic area  138  and the first magnetic area  134  being relatively disposed. As a result, it is not limited in this invention that the second magnetic area  138  has to be disposed in the face of the first magnetic area  134 . That is to say, a moving path of the second magnetic area  138  could face the first magnetic area  134 , the second magnetic area  138  could face a moving path of the first magnetic area  134 , or the moving path of the second magnetic area  138  could face the moving path of the first magnetic area  134 . Summarily, any previous mentioned means could be alternatively applied as long as the magnetism is generated between the second magnetic area  138  and the first magnetic area  134 . Besides, the second magnetism of the second magnetic area  138  and the first magnetism of the first magnetic area  134  could be arranged either by the same magnetism or by different magnetisms for respectively generating a repulsive force or an attractive force between each other. Especially, when a plurality of first magnetic areas  134  and a plurality of second magnetic areas  138  are individually defined on the first driven wheel  132  and the second driven wheel  136 , the first magnetic areas  134  and the second magnetic areas  138  could be arranged by the same magnetism (like the north magnetic pole or the south magnetic pole). Alternatively, the first magnetic areas  134  and the second magnetic areas  138  could be also arranged by the north magnetic pole and the south magnetic pole. Namely, some of the first magnetic areas  134  are defined by the north magnetic pole, and some of which are defined by the south magnetic pole. Similarly, the arrangement of magnetism in the second magnetic areas  138  is same as that of the first magnetic areas  134 . In this embodiment, the surfaces of the first magnetic areas  134  and the second magnetic areas  138  are all defined by the same south magnetic pole, so that a repulsive force is thence produced. Further, the moving path of the second magnetic area  138  is correspondingly disposed relative to the moving path of the first magnetic area  134  (as shown by  FIG. 3 ), and a central line  137  of the moving path of the second magnetic area  138  is perpendicular to a central line  137  of the moving path of the first magnetic area  134 , so that the a magnetic function would be performed when a certain section of the moving path of the second magnetic area  138  meets the first magnetic area  134 . When a pedal  150  on the bicycle is trodden, the second driven wheel  136  would thence bring the second magnetic area  138  to rotate, and the magnetism generated between the second magnetic area  138  and the first magnetic area  134  could accordingly rotate the first magnetic area  134 , so that the dynamo  120  connected to the first driven wheel  132  could be driven to generate electricity. In this embodiment, the first driven wheel  132  includes a first spindle  132   a  and a first turntable  132   b  connected to the first spindle  132   a.  Wherein, the first spindle  132   a  connects to the dynamo  120 , and the first turntable  132   b  has a first side portion  133   a  surrounding a central line  133  of the first spindle  132   a  and has a first end portion  133   b  penetrating the central line  133  of the first spindle  132   a.  The second driven wheel  136  has a second spindle  136   a  and a second turntable  136   b  connected to the second spindle  136   a.  Moreover, the second turntable  136   b  has a second side portion  137   a  surrounding a central line  137  of the second spindle  136   a,  and has a second end portion  137   b  penetrating the central line  137  of the second spindle  136   a.  Additionally, the first magnetic area  134  is disposed on the first side portion  133   a,  and the second magnetic area  138  is disposed on the second end portion  137   b.  Due to the fact that the central line  137  of the second spindle  136   a  is substantially perpendicular to the central line  133  of the first spindle  132   a,  the second end portion  137   b  thence faces the first side portion  133   a.  Thus, the second magnetic area  138  accordingly faces the first magnetic area  134 . In this preferred embodiment, the second driven wheel  136  is not limited to be applied as the bicycle wheel. Alternatively, the second driven wheel  136  could also be applied to the wheel disk installed on the wheel of the bicycle. Referring to  FIG. 4 , the first spindle  132   a  of the first driven wheel  132  in the driver device  130  could be alternatively dispatched to further install on the spindle  122  of the dynamo  120 . As a result, when the driver device  130  is not in use, or when the first driven wheel  132  needs to be equipped with the first magnetic area  134  in a different arrangement, the first driven wheel  132  could be directly dismantled of the dynamo  120 . In the embodiment, the first spindle  132   a  of the first driven wheel  132  is threaded to the spindle  122  of the dynamo  120 . As it should be, other coupling means or buckling methods could be alternatively applied. Optionally, the first spindle  132   a  of the first driven wheel  132  is replaced by the spindle  122  of the dynamo  120 . Whereby, the first turntable  132   b  of the first driven wheel  132  in the driver device  130  could be directly taken apart for being installed on the spindle  122  of the dynamo  120 . Additionally, the radiating device in this embodiment could adopt an LED. As it should be, bulbs or other illuminating means could be alternatively applied. 
         [0027]    Accordingly, the radiating system in the present invention utilizes the magnetic driver device installed between the bicycle and the dynamo. Whereby, the magnetic driver device facilitates the energy transmission between the bicycle and the dynamo, so that the kinetic energy provided by the bicycle could be transmitted to the dynamo for generating electricity. Accordingly, the magnetic driver device has a set of driven wheels capable of generating magnetism therebetween by a non-touchable or non-contacted way. One of the driven wheels is installed on the dynamo, and the other one is installed on the bicycle wheel. Therefore, by applying the repulsive force generated from the same magnetism and the attractive force generated from the opposite magnetism, the kinetic energy from the bicycle wheel could be transmitted to the dynamo without contact for generating electricity during a riding. Accordingly, less energy would be consumed in time of transmission, and the environmental issue as well as the wastage of batteries would be also considered. Therefore, the present invention is favorably designed to be in conformity with the future market that pursues a green demand. 
         [0028]    To sum up, the present invention takes advantage of using the non-contacted energy transmission—magnetism—on the bicycle adapted to the driver device of the dynamo for generating electricity. Since magnetism is a kind of non-contacted transmission, the kinetic energy generated in time of treading the pedal of the bicycle could be transmitted to the dynamo by the driver device, and the problem of consuming energy via rubbing is also favorably diminished. Moreover, a minimum of the resistance is produced little when the present invention adopts the non-contacted driving means. Therefore, riders do not have to provide much strength while riding the bicycle for generating electricity, and the device would not be readily worn out.