Abstract:
A power transmission structure of a power supply unit includes a base plate. The base plate is provided with a plurality of spaced metallic plates. One end of each metallic plate is provided with a first connecting portion and the other end is provided with a second connecting portion to connect the components of the power supply unit respectively for power transmission. Thus, the present invention can take the place of conventional power cords, and the power transmission structure can be flattened to decrease the space occupied by the power transmission device, such that the required interior accommodation space of the power supply unit can be decreased effectively and the volume of the power supply unit can be reduced.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a power transmission device, and more particularly to a power transmission structure of a power supply unit. 
     2. Description of the Prior Art 
     The interior of a conventional power supply unit is provided with a plurality of power cords to connect components and to connect a power input end with a power converting device and to connect the power converting device with a power output end for power transmission. In general, the radial cross-section of a conventional power cord has a circular shape. A conventional power supply unit is provided with power cords having a diameter of at least 8 mm as power transmission. With the power cords to connect the components of the power supply unit, the power cords occupy too much space, so the power supply unit must have a certain volume and interior space. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide a power transmission structure of a power supply unit, which is able to decrease the space occupied by the power transmission device, such that the required interior accommodation space of the power supply unit can be decreased effectively and the volume of the power supply unit can be reduced. 
     In order to achieve the object, the power transmission structure of a power supply unit of the present invention comprises a base plate, a positioning plate, a plurality of metallic plates, a press plate, and a fixing plate. The base plate is made of an insulation material and disposed at an inner wall of the power supply unit. The positioning plate is made of an insulation material. The positioning plate is parallel to the base plate and disposed on the base plate. The positioning plate is formed with a plurality of through troughs. The through troughs are spaced and parallel to each other. The metallic plates are located in the through troughs of the positioning plate. One end of each metallic plate is provided with a first connecting portion. The first connecting portion perpendicularly extends out of the positioning plate. Another end of each metallic plate is provided with a second connecting portion. The second connecting portion perpendicularly extends out of the positioning plate. The press plate is made of an insulation material. The press plate is parallel to the metallic plates and disposed on the metallic plates. Both the first connecting portions and the second connecting portions of the metallic plates extend out of the press plate. The fixing plate is disposed on the press plate. The fixing plate has a width greater than that of the press plate. Two sides of the fixing plate are provided with lip portions. The fixing plate is formed with an accommodation space between the lip portions for accommodating the press plate, the positioning plate and the base plate. The lip portions are formed with a plurality of spaced locking holes. The fixing board is locked to the inner wall of the power supply unit via a plurality of locking members. 
     The power transmission structure of the power supply unit of the present invention uses the first connecting portions and the second connecting portions of the metallic plates to connect the components of the power supply unit respectively for power transmission via the metallic plates. Thus, the power transmission structure can be flattened to decrease the space occupied by the power transmission device, such that the required interior accommodation space of the power supply unit can be decreased effectively and the volume of the power supply unit can be reduced. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of the present invention; 
         FIG. 2  is an exploded view of the present invention; 
         FIG. 3  is a sectional view of the present invention; 
         FIG. 4  is a schematic view showing the assembly of the present invention; and 
         FIG. 5  is a schematic view showing the use of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings. 
       FIG. 1  is a perspective view of the present invention.  FIG. 2  is an exploded view of the present invention.  FIG. 3  is a sectional view of the present invention. The present invention discloses a power transmission structure of a power supply unit. FIG.  4  is a schematic view showing the assembly of the present invention. The power supply unit  200  has a case  210 . The power transmission structure comprises a base plate  10 , a positioning plate  20 , a plurality of metallic plates  30 , a press plate  40 , a fixing plate  50 , and a cover plate  60 . 
     The base plate  10  is an elongate plate. The base plate  10  is made of an insulation material to provide an insulation effect. The base plate  10  is disposed on the inner wall of the case  210 . 
     The positioning plate  20  is parallel to the base plate  10  and disposed on the base plate  10 . The positioning plate  20  is also made of an insulation material to provide an insulation effect. The positioning plate  20  is an elongate plate corresponding to the base plate  10 . The positioning plate  20  has a width equal to that of the base plate  10 . The positioning plate  20  has a length slightly less than that of the base plate  10 . The positioning plate  20  is formed with a plurality of through troughs  21 . The through troughs  21  are elongate through troughs which are disposed in a longitudinal direction of the positioning plate  20  and spaced and parallel to each other. First ends of the through troughs  21  are disposed at different positions of the positioning plate  20 , and opposing second ends of the through troughs  21  are flush with each other. 
     The metallic plates  30  are located in the through troughs  21  of the positioning plate  20 . The metallic plates  30  are elongate plates corresponding to the through troughs  21  respectively so as to be engaged and positioned in the through troughs  21 . One end of each metallic plate  30  is bent to form a first connecting portion  31 . The first connecting portion  31  perpendicularly extends out of the positioning plate  20 . The first connecting portion  31  is formed with a plurality of locking holes  311 . Another end of each metallic plate  30  is bent to form a second connecting portion  32 . The second connecting portion  32  perpendicularly extends out of the positioning plate  20 . The second connecting portion  32  is formed with a plurality of locking holes  321 . The first connecting portions  31  of the metallic plates  30  correspond to the first ends of the through troughs  21 , and the second connecting portions  32  of the metallic plates  30  correspond to the second ends of the through troughs  21 . The lengths of the first connecting portions  31  and the second connecting portions  32  can be different according to the demand of use. In the present invention, the length of the first connecting portion  31  is greater than that of the second connecting portion  32 . 
     The press plate  40  is parallel to the positioning plate  20  and the metallic plates  30  and disposed on the metallic plates  30 . The press plate  40  is also made of an insulation material to provide an insulation effect. The press plate  40  is an elongate plate corresponding to the positioning plate  20 . The press plate  40  has a width equal to that of the positioning plate  20 . The press plate  40  has a length slightly less than that of the positioning plate  20 . The press plate  40  has a first end corresponding to the first end of the positioning plate  20  and a second end corresponding to the other ends of the through troughs  21 . The press plate  40  is formed with a plurality of slots  41  corresponding to the first connecting portions  31  of the metallic plates  30  for the first connecting portions  31  to extend out of the slots  41 . The second end of the press plate  40  leans against the second connecting portions  32  of the metallic plates  30 , and the second connecting portions  32  protrude out of the press plate  40 . 
     The fixing plate  50  is parallel to the press plate  40  and disposed on the press plate  40 . The fixing plate  50  is an elongate plate. The fixing plate  50  has a width greater than that of the press plate  40 . The fixing plate  50  has a length less than that of the press plate  40 . The slots  41  of the press plate  40  are exposed out of the fixing plate  50 . Two longitudinal sides of the fixing plate  50  are provided with lip portions  51 . The lip portions  51  slightly protrude toward the press plate  40 , such that the fixing plate  50  is formed with a concave accommodation space between the lip portions  51  to accommodate the press plate  40 , the positioning plate  20 , and the base plate  10 . The lip portions  51  are formed with a plurality of spaced locking holes  511 . One end of the fixing plate  50 , corresponding to the second connecting portions  32 , is provided with a raised board  52 . The raised board  52  protrudes outward opposite the press plate  40 . The raised board  52  is formed with a plurality of locking holes  521  for the fixing board  50  to be locked to the inner wall of the case  210  by a plurality of locking members  300 . 
     The cover plate  60  is disposed on the second connecting portions  32  of the metallic plates  30 . The cover plate  60  has an insulation effect. One side of the cover plate  60 , facing the metallic plates  30 , is provided with a plurality of first connecting members  61  corresponding to the second connecting portions  32 . The first connecting members  61  are conductive members. The first connecting members  61  are formed with locking holes  611  corresponding to the locking holes  321  of the second connecting portions  32 , such that the first connecting members  61  and second connecting portions  32  are connected by screws. Another side of the cover plate  60  is provided with a plurality of second connecting members  62 . The second connecting members  62  are conductive members and electrically connected with the first connecting members  61 , respectively. The second connecting members  62  are staggered each other. Each second connecting member  62  is formed with a locking hole  621 . Two ends of each second connecting member  62  are bent to form a support portion  622 . The support portion  622  is perpendicular to the second connecting member  62 , such that the second connecting member  62  has a U-like shape to strengthen the structure of the second connecting member  62 . In the present invention, the cover plate  60  is a PCB circuit board. The first connecting members  61  and the second connecting members  62  are disposed on the cover plate  60 . The side of the cover plate  60 , having the first connecting members  61 , is etched with circuit lines  63 , so that first connecting members  61  and the second connecting members  62  are electrically connected through the circuit lines  63 . The circuit lines  63  are copper foils. 
       FIG. 4  is a schematic view showing the assembly of the present invention.  FIG. 5  is a schematic view showing the use of the present invention. In cooperation with  FIG. 2 , when the power transmission structure of the power supply unit is used, the fixing plate  20  is first placed on the base plate  10  and the metallic plates  30  are disposed in the through troughs  21  of the positioning plate  20 , respectively. The press plate  40  is to cover the metallic plates  30  and placed on the positioning plate  20 . The first connecting portions  31  of the metallic plates  30  extend out of the slots  41  of the press plate  40 , respectively. Finally, the fixing plate  50  is to cover the press plate  40 , and the press plate  40  is accommodated in the accommodation space of the fixing plate  50 . After that, the fixing plate  50  is locked at a predetermined position on the inner wall of the case  210  of the power supply unit  200 . The fixing plate  50  makes the base plate  10 , the positioning plate  20 , the metallic plates  30 , and the press plate  40  tightly attach to the inner wall of the case  210  of the power supply unit  200  and be positioned in the accommodation space of the fixing plate  50 . The second connecting portions  32  of the metallic plates  30  are further connected with the cover plate  60 . The connecting portions  32  are respectively connected with the first connecting members  61  and further electrically connected with the second connecting members  62 . 
     In the present invention, the first connecting portions  31  of the metallic plates  30  correspond in position to the components of the power supply unit  200  respectively for the components of the power supply unit  200  to be connected with the first connecting portions  31 . The second connecting portions  32  of the metallic plates  30  and the cover plate  60  extend out of the case  210  of the power supply unit  200 , enabling the second connecting members  62  to function as the output end and the input end of the power supply unit  200 . An external device can be connected with the second connecting members  62  and further electrically connected with the second connecting portions  32 , such that the external device can be electrically connected with the power supply unit  200  via the metallic plates  30  for power transmission. 
     It is noted that all the base plate  10 , the positioning plate  20 , the metallic plates  30 , and the press plate  40 , and the fixing plate  50  are thin plates. When they are assembled and locked to the inner wall of the power supply unit  200 , they will be tightly attached to the inner wall of the power supply unit  200 , not occupying space. 
     The required interior accommodation space of the power supply unit can be reduced so as to flatten the power transmission structure and reduce the volume of the power supply unit. 
     In addition, the power transmission structure is tightly attached to the inner wall of the power supply unit  200 , so the space for the power supply unit  200  to provide heat dissipation holes and a heat sink is increased, enabling the power supply unit  200  to have a better heat dissipation effect. 
     Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.