Abstract:
A battery charger having fixed ends for winding and releasing wires includes a box; an immovable axis provided at an inner wall of the box; a large turning wheel having a larger diameter and a small turning wheel having a smaller diameter disposed next to the large turning wheel, wherein the large and small turning wheels have a same center orifice flexibly connected into the immovable axis; and a wire having one end thereof penetrated through a through hole provided at the inner wall and further connected to the circuit board and winded in the large and small wire storage grooves. A wire is efficiently collected in the box, and thus making the wire of the battery charger spaceless for ready storage.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    (a) Field of the Invention  
           [0002]    The invention relates to a battery charger having fixed ends for winding and releasing wires, and more particularly, to a battery charger disposed with coaxial wire winding turning wheels having different diameters at the interior thereof for collecting and releasing wires of the battery charger.  
           [0003]    (b) Description of the Prior Art  
           [0004]    Battery chargers of common electric appliances generally have long signals wires that cannot be collected into the interior of the battery charger, and thus take up quite large spaces as well as being too bulky for packaging or storage.  
           [0005]    A typical structure of a prior wire winding device in a battery charger, as disclosed by the Taiwan Patent Publication No. 468887 “Readily Portable and Wire Winding Device for Cellular Phone Chargers” for instance, the wire winding thereof is manually operated using a rotational base that simultaneously rotates a rotational wire winding disk thereof for accomplishing the purpose of winding the wire of the battery charger.  
           [0006]    It is observed from the above invention that the process of wire winding appears somewhat cumbersome and inconvenient for that the hand of a user is used for rotating the base thereof.  
           [0007]    According to the “Earphone Wire Winding Box with Coaxial and Dual Wheels” as disclosed by the inventor hereby in the U.S. Pat. No. 6,434,249B1, a same axis  30  and turning wheels  10  and  20  having different diameters are utilized, such that when a signal wire S stored in the large turning wheel  10  is pulled out, a lower wire S stored in a storage groove  25  of the small turning wheel  20  lowers by a rather short distance. Although the invention is indeed quite practical, the implementations thereof yet are limited to earphone wire winding boxes.  
           [0008]    In the view of the above, in order to efficiently control wires of a battery charger such that the wires thereof are hidden when winded and left undamaged when released, it is a vital task of the invention as how to combine a wire releasing and winding structure having coaxial and dual wheels with components of a battery charger  
         SUMMARY OF THE INVENTION  
         [0009]    Therefore, an object of the invention is to provide a battery charger having fixed ends for winding and releasing wires so as to efficiently wind the wires into a box of the battery charger, thereby having the wires of the battery charger as spaceless and also being ready for packaging and storage.  
           [0010]    The other object of the invention is to provide a battery charger having fixed ends for winding and releasing wires so as to prevent conductive joints at the lower ends of the wires from displacing or falling of during winding or releasing processes of the wires.  
           [0011]    BRIEF DESCRIPTION OF THE DRAWING$ FIG. 1 shows an exploded elevational view according to the invention.  
           [0012]    [0012]FIG. 2 shows a sectional view illustrating the wire being pulled out of the box according to the invention.  
           [0013]    [0013]FIG. 3 shows a sectional view illustrating the wire winding according to the invention.  
           [0014]    [0014]FIG. 4 shows the plug of the wire in another embodiment according to the invention.  
           [0015]    [0015]FIG. 5 shows a sectional view of yet another embodiment according to the invention.  
           [0016]    [0016]FIG. 6 shows a side schematic view of the large and small turning wheels storing the wire according to the invention.  
           [0017]    [0017]FIG. 7 shows a sectional view of yet another embodiment according to the invention.  
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0018]    Referring to FIGS. 1 and 2, the invention is characterized by:  
         [0019]    an box  10  comprising a circuit board  12  at the interior thereof, and a power plug  14  extended along and penetrated through an outer wall  11  thereof;  
         [0020]    an outer housing  20  provided with a guiding orifice  22  and combined to the box  10 ;  
         [0021]    a protruding and immovable axis  30  and a through hole  161  provided at an inner wall  16  of the box  10 ;  
         [0022]    a large turning wheel  40  having a larger diameter D, and a small turning wheel  45  having a smaller diameter d disposed next to the large turning wheel  40 , wherein the large and small turning wheels  40  and  45  have a same center orifice  42  flexibly connected into the immovable axis  30 , so that the large and small turning wheels  40  and  45  rotate with elasticity regarding the center orifice  42  as the center of rotation thereof; large and small wire storage grooves  41  and  43  formed at the wheel planes of the large and small turning wheels  40  and  45 ; and a wedging slot  46  disposed at a lateral side of the wheel plane of the large turning wheel  40 ; and  
         [0023]    a wire  50  having one end thereof penetrated through a through hole  161  provided at the inner wall  16  and further connected to the circuit board  12  and the other end thereof being a terminal plug  55 , and winded in the large and small wire storage grooves  41  and  43 , wherein an appropriate position of the wire  50  is placed and wedged in the wedging slot  46  for forming inner and outer wires  54  and  52 , respectively.  
         [0024]    According to the aforesaid primary characteristics, wherein a side recess  47  of the large turning wheel  40  is fastened and connected to a spring  60  having an inner end  62  placed and wedged in a wedging slot  32  of the immovable axis  30  and an outer end  64  placed and wedged in a wedging slot  471  provided in advance at the wall of the side recess  47 .  
         [0025]    According to the aforesaid primary characteristics, wherein an anti-slide sheath  162  is accommodated in the through hole  161  provided at the outer wall  16  of the box  10 , and the inner wire  54  is tightened and positioned in the opening of the anti-slide sheath  162  (as shown in FIG. 2).  
         [0026]    According to the aforesaid primary characteristics, wherein one end of the immovable axis  30  is flexibly connected to a ring connector  70  having a center orifice  72  and a bolt  74 . The bolt  74  is inserted into a hole  44  disposed at the outer sidewall of the large turning wheel  40 , the center orifice  72  is being penetrated through to flexibly connect to the immovable axis  30 , and the ring connector  70  is combined to the outer sidewall of the large turning wheel  4 Q.  
         [0027]    According to the aforesaid primary characteristics, wherein the outer housing is disposed with a pivotal opening  24  at the center thereof, and a screw bolt  26  is inserted and connected into the pivotal opening  24  and a screw opening  33  provided in advance at the front end of the immovable axis  30 .  
         [0028]    According to the aforesaid primary characteristics, wherein the back end of the immovable axis  30  is extended to the outer wall  11  in a longitudinal direction and combined with the outer wall  11  into one body, and the inner wall  16  is a ring-shaped with the outer periphery thereof disjointed from the sidewalls of the box  10  (as shown in FIGS. 5 and 7).  
         [0029]    To better understand the invention, descriptions shall be given with the accompanying drawings below.  
         [0030]    1. Referring to FIGS. 1 and 2, the wire  50  stored in the large wire storage groove  41  is defined as the outer wire  52  and the wire  50  stored in the small wire storage groove  43  is defined as the small inner wire  54 .  
         [0031]    The inner and outer wires  54  and  52  are placed and wedged in the wedging slot  46  with a positioned partition; that is, a first fixed end of the wire  350  is formed at the location of the wedging slot  46 , and a second fixed end is of the wire  50  is formed where the inner wire  54  is being fastened by the anti-slide sheath  162  at the inner wall  16 . When the hand of a user pulls the terminal plug  55  outward, the outer wire  52  is guided to the exterior through the guiding orifice  22 , and the large and small turning wheels  40  and  45  are rotated regarding the immovable axis  30  as the center of rotation thereof. For one revolution made by the large turning wheel  40 , the released (or winded) length of the outer wire  52  in the large wire storage groove  41  is π×D, where D is the diameter of the large turning wheel  40 . Similarly, for one revolution made by the small turning wheel  45 , the released (or winded) length of the inner wire  54  in the small wire storage groove  43  is π×d, where d is the diameter of the small turning wheel  45 . As a result, when the large and small turning wheels  40  and  45  rotate coaxially, the ratio of the lengths the inner and outer wires  54  and  52  released or winded equals to the ratio of the large and small turning wheels  40  and  45 ; that is to say, D:d. In a preferred embodiment according to the invention, suppose the diameter ratio of the large and small turning wheels  40  and  45  is 10:1, the length of the inner wire  54  released is 10 cm when the length of the outer wire  52  released is 100 cm. For the reason that a fixed end is formed from the tightening of the anti-slide sheath  162  around the inner wire  54 , the inner wire  54  shows a lax state in the small wire storage groove  43  when it is released from the small wire storage groove  43 , and hence displacement of the inner wire  54 ′ in the box  10  is considered as non-existent. Referring to FIG. 6, the larger the diameter ratio (D:d) of the large and small turning wheels  40  and  45  is (meaning the smaller the diameter of the small turning wheels gets), the less the length of the inner wire  54  released from the small wire storage groove  43  becomes. Consequently, the lax state of the inner wire  54  produced in the small wire storage groove  43  is far less too drastic to cause a mess of the wire. When the outer wire  52  is released to the limit thereof, the inner wire  52  is not released or displaced along with the outer wire  52  due to the positioning of the wire by the wedging slot  46 .  
         [0032]    2. Referring to FIG. 2, the conductive metal wire at rear end of the inner wire  54 ′ at the interior of the box  10  is connected with the circuit board  12  by means of welding or terminal insertions for forming a conductive joint.  
         [0033]    At this point, another fixed end of the inner wire  54 ′ is formed due to the tightening of the anti-slide sheath  162 , and therefore the inner wire  54 ′ remains immovable. To be more specific, displacements of the inner wire  54 ′ in the box  10  are not caused when releasing (or winding) the inner wire  54  from the small wire storage groove  43 .  
         [0034]    3. Referring to FIG. 3 showing a sectional view illustrating the winding process, wherein elastic rotations of the large and small turning wheels  40  and  45  are accomplished through the spring  60 . Because that the inner end  62  of the spring  60  is fastened to the immovable axis  30  and the outer end  64  is fastened in the side recess  47 , when the pulling force of the outer wire  52  being pulled out is dismissed, the contraction force of the spring  60  may be utilized for rotating the large and small turning wheels  40  and  45  in a reverse direction in order to wind the outer wire  52  back into the large wire storage groove  41 . The lax inner wire  54  is subsequently winded in a reverse direction to restore back to a tightened state, thereby quickly completing the winding process. At this point, the terminal plug (socket)  55  is fasted at the outer periphery of the guiding orifice  22 , so as to hide the wire  50  of the electric appliance within the outer housing  20 . In addition, the ring connector  70  covers the outer edge of the spring  60  for preventing displacements of the spring  60 .  
         [0035]    4. Referring to FIG. 5 showing another embodiment according to the invention, the immovable axis  30  may also be extended upward from the interior of the outer wall  11  of the box  10  such that the immovable axis  30  is penetrated through the circuit board  20  and the inner wall  16  to fasten to the outer housing  20 . Referring to FIGS. 2 and 3, to increase the stress intensity of the immovable axis  30 , the screw bolt  26  is connected into the screw opening  33  of the immovable axis  30  through the pivotal opening  24  of the outer housing  20 . Referring to FIG. 4, to make adaptations to various electric appliances, the terminal plug  55  connected at the outer end of the outer wire  52  may be different forms of plugs or sockets. The power plug  14  may also be implemented as column-shaped to coordinate with power sockets of vehicles. Referring to FIG. 7, after the outer housing  20  and the box  10  are combined into one body, the inner wall  16  may be formed as discontinuous in shaped, that is, the inner wall  16  is circular in shape with the outer periphery thereof disjointed with the sidewalls of the box  10 , as well as being fastened to the immovable axis  30 . Through this embodiment, the invention may similarly wind and release the wire  50 .  
         [0036]    It is of course to be understood that the embodiment described herein is merely illustrative of the principles of the invention and that a wide variety of modifications thereto may be effected by persons skilled in the art without departing from the spirit and scope of the invention as set forth in the following claims.