Abstract:
The present invention discloses a power supply wire receiving structure comprising a cable take-up unit and a charging wire. The charging wire is applicable to an electronic device and made of bullet-proof material so as to have high tensile strength. The charging wire is flat-shaped so that it is easy to be received in the cable take-up unit. The combination of the charging wire and the cable take-up unit enables the charging wire to be received in the cable take-up unit and facilitates the arrangement of the wire. Furthermore, the cable take-up unit can be coupled to a charging unit which has an accommodating groove so that the cable take-up unit is received in the accommodating groove of charging unit to reduce the product volume and be easy to carry.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    (a) Field of the Invention The present invention relates to a power supply wire receiving structure, and more particularly to a power supply wire receiving structure capable of receiving a flat-shaped charging wire made of bullet-proof material. 
         [0002]    (b) Description of the Prior Art 
         [0003]    A charging wire is usually used to transmit electric power from a socket to an electronic device, for example, an electronic product such as a notebook computer, a cellular phone, a handheld digital device, etc., so as to supply electric energy to the electronic device or charge the rechargeable battery of the electronic device. 
         [0004]    However, mostly in the manufacture of charging wires for common electronic devices, copper conductors are stranded with one another or parallel arranged and then coated with engineering plastic, such as heater parallel neoprene (HPN), service parallel thermoplastic (SPT), polyvinyl chloride (PVC), etc., to form insulating protection layers. Nevertheless, the charging wires produced in this manner have low tensile strength. They are easy to be broken after repeated insertion and extraction operations because the copper conductors yield to the stress or the insulating protection layers are bent and deformed by force, resulting in poor electrical conduction and failure in normal service, even the potential hazard of sparking and burning. 
         [0005]    Furthermore, charging wires for common electronic devices are short of wire arrangement structures and need to be arranged and tied by rubber bands or belts with labor. It is inaesthetic and exposed wires increase the overall volume so that the charging wires are inconvenient to carry. 
       SUMMARY OF THE INVENTION 
       [0006]    In light of the aforementioned problems of the prior art, an object of the present invention is to provide a power supply wire receiving structure, so as to the problem that it is short of power supply wire receiving devices and not easy to arrange wires in the prior art. 
         [0007]    According to the object of the present invention, there is provided a power supply wire receiving structure comprising a cable take-up unit and a charging wire for an electronic device. The charging wire for an electronic device is flat-shaped and received in the cable take-up unit. 
         [0008]    The charging wire for an electronic device is made of bullet-proof material. 
         [0009]    The charging wire for an electronic device has a connecting part that is round-shaped. 
         [0010]    The connecting part has a hole. 
         [0011]    As described above, the charging wire for an electronic device of the power supply wire receiving structure according to the present invention is flat-shaped so that it is easy to be received in the cable take-up unit to facilitate the arrangement of the wire. Moreover, the charging wire is made of bullet-proof material and thus has high tensile strength so that it can endure to be pulled and dragged repeatedly and not easy to be broken. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0012]      FIG. 1  is an assembly drawing of a first embodiment of the power supply wire receiving structure according to the present invention; 
           [0013]      FIG. 2  is an exploded view of a first embodiment of the power supply wire receiving structure according to the present invention; 
           [0014]      FIG. 3  is a schematic view showing the first action of a cable take-up unit of a first embodiment of the power supply wire receiving structure according to the present invention; 
           [0015]      FIG. 4  is a schematic view showing the second action of a cable take-up unit of a first embodiment of the power supply wire receiving structure according to the present invention; 
           [0016]      FIG. 5  is a schematic view showing the third action of a cable take-up unit of a first embodiment of the power supply wire receiving structure according to the present invention; 
           [0017]      FIG. 6  is a schematic view showing the fourth action of a cable take-up unit of a first embodiment of the power supply wire receiving structure according to the present invention; and 
           [0018]      FIG. 7  is an exploded view of a second embodiment of the power supply wire receiving structure according to the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0019]    Embodiments of the power supply wire receiving structure according to the present invention will be described hereinbelow with reference to the related drawings. 
         [0020]    Referring to  FIGS. 1 and 2 , there are illustrated an assembly drawing and an exploded view of a first embodiment of the power supply wire receiving structure according to the present invention. In these figures, the power supply wire receiving structure comprises a cable take-up unit  2  and a charging wire  1 . 
         [0021]    The charging wire  1  can be made by twisting bullet-proof threads and copper conductors, followed by coating engineering plastic having an insulating effect, such as heater parallel neoprene (HPN), service parallel thermoplastic (SPT), polyvinyl chloride (PVC), etc. on the outer layer thereof. The bullet-proof material is a polyaromatic amide fiber (KELVAR), which has the features of low density and high strength and thus high tensile strength so that the charging wire can endure to be pulled and dragged repeatedly and not easy to be broken. Furthermore, in order to receive the charging wire  1  in the cable take-up unit  2 , the shape of the charging wire  1  is designed as a flat shape for the convenience of drawing or winding. The charging wire  1  has at its one end a round-shaped connecting part  11  in which a hole  12  is recessed. The charging wire  1  can be electrically connected to an electronic device like a notebook computer, a handheld mobile device (such as a cellular phone), a navigation device, an audio/video player, etc., so as to supply electric energy to the electronic device or charge its rechargeable battery. 
         [0022]    The cable take-up unit  2  may be a coiling drum, which is used to receive a charging wire for an electronic device and has a casing  21 , a turning wheel  22 , a ball  23  and a spiral spring  25 . 
         [0023]    The casing  21  comprises a first casing  211  and a second casing  212  and the charging wire  1  is accommodated in the first casing  211  and the second casing  212 . A shaft post  213  protrudes from the central portion of the first casing  211  and is provided with a split groove  214  such that the spiral spring  25  and the turning wheel  22  are sequentially disposed thereon. The upper end part of the split groove  214  is formed with a screw hole  215 . A through hole  218  is provided on the central portion of the inner surface of the second casing  212  such that a screwing element  210  passes therethrough and is screwed into the screw hole  215  of the first casing  211 . The second casing  212  has a position limiting slot  219  recessed on one side of the through hole  218  and the position limiting slot  219  can be formed in a stripe shape. Furthermore, a cover plate  20  is attached to the surface of the second casing  212 . The first casing  211  and the second casing  212  can mutually engage with the shaft post  213  and the through hole  218 . 
         [0024]    Also referring to both  FIGS. 2 and 3 , a locating hole  221  is provided on the turning wheel  22 . The locating hole  221  is hollow and disposed around the shaft post  213  of the first casing  211 . The turning wheel  22  has two slots  222  located on the circumferential face of the turning wheel  22 . Furthermore, a groove  223  is annularly disposed on the turning wheel  22 . Furthermore, a curved trench  225  is circumferentially disposed over a portion adjacent to the groove  223  and is adjacent to the end portion of the groove  223 . The turning wheel  22  can be rotated clockwise or counterclockwise by the driving of the charging wire  1 . 
         [0025]    The ball  23  can be made of metallic material and be movably mounted on the surface of the turning wheel  22 . When the first casing  211  engages with the second casing  212 , the ball  23  is just located at the position of the groove  223  of the turning wheel  22  corresponding to the position limiting slot  219  of the second casing  212 . 
         [0026]    The spiral spring  25  is accommodated within the turning wheel  22 , and the locking portion  251  on its inner side is connected to the split groove  214  of the shaft post  213  of the first casing  211 . 
         [0027]    Referring to  FIGS. 3 and 4 , there are illustrated schematic views respectively showing the first action and the second action of a cable take-up unit of a first embodiment of the power supply wire receiving structure according to the present invention. When the charging wire  1  is pulled out to rotate the turning wheel  22  in a counterclockwise direction, the ball  23  in the groove  223  will rotate clockwise toward the curved trench  225  and be stopped at a desired position at an appropriate time. If it is desired to continue drawing of the wire, it only needs to pull the charging wire  1  slightly to a predetermined length and then release it. At this time, the ball  23  rolls clockwise due to the elastic deformation of the spiral spring  25 . The ball  23  is positioned after it has moved toward and been caught by the guide channel  224 . Therefore, the user can pull the charging wire  1  to a desired length, and then the wire will be temporarily held at this length and not be automatically wound. If the user continues to pull the charging wire  1 , the ball  23  is caught by the guide channel  224  no longer so as to permit the turning wheel  22  to rotate in a counterclockwise direction so that the ball  23  in the guide channel  224  moves toward the groove  223  and rotates clockwise. 
         [0028]    Referring to  FIGS. 5 and 6 , there are illustrated schematic views respectively showing the third action and the fourth action of a cable take-up unit of a first embodiment of the power supply wire receiving structure according to the present invention. When the user desires to wind the charging wire  1 , it only needs to pull the charging wire  1  slightly to another predetermined length so as to permit the ball  23  to move from the guide channel  224  to the groove  223  and then release the charging wire  1  so as to permit the turning wheel  22  to rotate in a clockwise direction by the action of the spiral spring  25 . In this manner, the charging wire  1  is retracted so that the wire cannot be seen by appearance to provide an aesthetic effect. Furthermore, the charging wire  1  is flat-shaped so it is easy to be pulled and rewound. Moreover, the charging wire  1  is made of bullet-proof material so as to avoid the breaking of the charging wire  1  caused by excessively frequent pulling and rewinding of the wire, or excessive pull force. 
         [0029]    When the charging wire  1  is pulled out to a predetermined length every time, the catching structure of the cable take-up unit  2  can provide a stagewise non-return catching function so that the charging wire is temporarily held at this length for use. Moreover, when the charging wire  1  is pulled out to another predetermined length, the catching mechanism is automatically released and the charging wire can be automatically rewound so as to pull or wind the charging wire  1 . 
         [0030]    Referring to  FIG. 7 , there is illustrated an exploded view of a second embodiment of the power supply wire receiving structure according to the present invention. In this embodiment, the power supply wire receiving structure comprises a charging unit  3 , a cable take-up unit  2  and a charging wire  1 . The cable take-up unit  2  and the charging wire  1  are the same as those in the embodiment described above and will be explained in no more detail. The difference between this embodiment and the embodiment described above is that the charging unit  3  can be provided with an accommodating groove  31  in which the cable take-up unit  2  is received. The charging unit  3  is electrically connected to the charging wire  1 . When the charging wire  1  is received in the cable take-up unit  2 , no more exposed charging wire  1  can be seen by appearance. Not only does it look more aesthetic, but the overall volume can also be reduced and easy to carry. When the user desires to charge an electronic device, it only needs to pull and electrically connect the connecting part  11  of the charging wire exposed outside the charging unit  3  to the electronic device so as to supply electric energy to the electronic device for the convenience of operation or charge the electronic device for the convenience of outdoor use. 
         [0031]    In summarization of the foregoing description, the effect of the power supply wire receiving structure according to the present invention is that the flat-shaped charging wire made of bullet-proof material is provided in the cable take-up unit so that it is not only easy to pull and rewind the wire but the wire also has high tensile strength and is not easy to be broken. 
         [0032]    Another effect of the power supply wire receiving structure according to the present invention is that the cable take-up unit can be built in the charging unit so that it is convenient for the user to carry the charging unit. 
         [0033]    The above description is illustrative only and is not to be considered limiting. Various modifications or changes can be made without departing from the spirit and scope of the invention. All such equivalent modifications and changes shall be included within the scope of the appended claims.