Abstract:
A bobbin structure of a transformer includes a winding frame. The winding frame includes a first winding section, two second winding sections formed on two sides of the first winding section and a channel penetrating the first winding section and the second winding sections. At least one slot is disposed on each second winding section. Thereby, the assembly process of the bobbin structure of the transformer is simplified and the assembly time is reduced.

Description:
TECHNICAL FIELD 
       [0001]    The disclosure relates to a bobbin, more particularly to a bobbin structure of a transformer. 
       BACKGROUND 
       [0002]    Transformers are electronic components widely used in electronic products. It transfers a current into another proportion of current for other electronic components to use. 
         [0003]    Traditionally, a transformer comprises a winding frame, a magnetic core set, a primary winding and a secondary winding, in which the primary winding and the secondary winding are wound around each winding section of the winding frame, separately. A part of the magnetic core set goes through the winding section of the winding frame. This way, a current goes through the primary winding to make the magnetic core set induce a magnetic field, thereby generating an induced current at the secondary winding. 
         [0004]    As electronic technology develops, the efficiency of power conversion regarding the electronic products becomes more essential. The safety standard of the products also becomes stricter, especially for the safety standard for the usage of the primary winding and the secondary winding of a transformer. Since today&#39;s transformer utilizes the thin copper wire for coils, it is difficult to be wound and makes assembly complicated and slow. Additionally, it can only sustain a small amount of current due to the thin copper wire and has safety issues during the operation. Hence, it is crucial to design an improved transformer capable of solving these problems. 
       SUMMARY 
       [0005]    One goal of the disclosure is to provide a bobbin structure of a transformer with a simplified assembly process which reduces its assembly time. 
         [0006]    To reach this goal, the disclosure provides a bobbin structure of a transformer comprising a winding frame. The winding frame comprises a first winding section, two second winding sections formed on two sides of the first winding section and a channel penetrating the first winding section and the second winding sections. At least one slot is disposed on each second winding section. 
         [0007]    Moreover, the disclosure may also achieve other effects. Since the conducting ring performs as a secondary winding, it can sustain greater current output. Each conducting plate is connected to the winding frame by plugging so the maintenance only requires replacing damaged components, which is more economical. By forming the air hole on the first winding section, gas with lower temperature from outside area may enter into the inside of the winding frame to perform heat exchange and may take away the heat generated from the operation of each winding. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0008]    The disclosure will become more fully understood from the detailed description and the drawings given herein below for illustration only, and thus does not limit the disclosure, wherein: 
           [0009]      FIG. 1  is an exploded view of a bobbin according to the disclosure; 
           [0010]      FIG. 2  is a perspective view of the bobbin according to the disclosure; 
           [0011]      FIG. 3  shows  FIG. 2  from another angle; 
           [0012]      FIG. 4  is a sectional view of  FIG. 2  along the sectional line  4 - 4 ; 
           [0013]      FIG. 5  is a sectional view of  FIG. 2  along the sectional line  5 - 5 ; 
           [0014]      FIG. 6  is a sectional view of  FIG. 2  along the sectional line  6 - 6 ; and 
           [0015]      FIG. 7  is a sectional view of another embodiment of the disclosure. 
       
    
    
     DETAILED DESCRIPTION 
       [0016]    In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the disclosed embodiments. It will be apparent, however, that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are schematically shown in order to simplify the drawing. 
         [0017]    Referring to  FIG. 1  to  FIG. 6 , the disclosure provides a bobbin structure of a transformer mainly comprising a winding frame  10  made of plastic insulation materials. The winding frame  10  is a hollow rectangular body and has a rectangular channel  11  parallel to the centerline. Further, two vertical plates  12  parallel to and spaced apart from each other are disposed and extends towards a direction perpendicular to the centerline. A first winding section  13  is formed between the two vertical plates  12  in order for a primary winding  4  to be wound around. 
         [0018]    An outer area of each vertical plate  12  extends and forms a plurality of separation plates  14 . Each separation plate  14  is roughly parallel to each vertical plate  11 . A slot  141  connecting with the channel  11  is disposed on each separation plate  14  and each slot  141  has a plugging hole  142  formed on a lateral side of the separation plate  14 . An area formed by each separation plate  14  becomes a second winding section  15 . 
         [0019]    Two sides of the bottom of each separation plate  14  extend and form two pin plates  16 . The bottom of each pin plate  16  is connected with two pins  17  for an outlet side of the primary winding  4  to be electrically connected to. Besides, an air hole  18  connecting with the rectangular channel  11  is formed in the first winding section  13 . 
         [0020]    The bobbin structure of the disclosure further comprises a plurality of conducting plates  20 . Each conducting plate  20  has a main body  21  and a conducting ring  22  fixed to the main body  21 . In this embodiment, the main body  21  is a circuit board and is in a reversed-T shape. The conducting ring  22  may be a copper sheet or a copper foil and is plugged into the plugging hole  142  of the slot  141  in order to be connected to the winding frame  10 , thereby becoming a secondary winding  5 . Since the cross-sectional area of the conducting ring  22  is greater than that of the traditional winding, the conducting ring  22  as a secondary winding can sustain a greater current, compared to a normal coil as a secondary winding in the traditional transformer. 
         [0021]    Moreover, the conducting ring  22  of this embodiment comprises two horizontal sections  221  parallel to each other, a first vertical section  222  bending and extending from one end of each horizontal section  221  and perpendicular to the horizontal section  222  and a third vertical section  223  as well as a fourth vertical section  224  bending and extending from the other end of each horizontal section  221  towards the opposite direction and perpendicular to the horizontal section  221 . The third vertical section  223  and the fourth vertical section  224  are parallel to the first vertical section  221 . An opening  225  is formed between the third vertical section  223  and the fourth vertical section  224 . This conducting ring  22  is attached to and fixed to one side of the main body  21  while the opening  225  thereof is located on a wide end near the main body  21 . The wide end of each main body  21  extends downwardly and forms two pins  23  for the outlet side of the secondary winding  5  to be electrically connected to. 
         [0022]    The bobbin structure of the disclosure may be assembled to a magnetic core set  3  for forming a transformer. The magnetic core set  3  comprises a first magnetic core  31  and a second magnetic core  2 . Both the first magnetic core  31  and the second magnetic core  2  are in a shape similar to English letter E. A central protruding part of each magnetic core ( 31 ,  32 ) goes through the inside of the channel  11  and forms a spacing gap corresponding to the arrangement of the air hole  18 . An upper protruding part and the lower protruding part of each magnetic core ( 31 ,  32 ) respectively cover the top surface and the bottom surface of each separation plate  14  and the primary winding  4 . Additionally, the upper protruding part and the lower protruding part are connected together (as shown in  FIG. 4 ) to form a transformer. 
         [0023]    This transformer may be installed on a circuit board  6  via holes or grooves on the circuit board (not shown in the figures) designed for each pin ( 17 ,  23 ) to be plugged into. When a current goes through the primary winding  4  and the secondary winding  5 , heat will be generated thereon. Meanwhile, the air hole  18  and the spacing gap together form a heat dissipation channel to dissipate heat to the outside area. Furthermore, the top of the primary winding  4  and the bottom of the upper and lower protruding part of each magnetic core ( 31 ,  32 ) also form a heat dissipation channel. On the other hand, any two adjacent separation plates  14  or the separation plate  14  and the vertical plate  12  form a heat dissipation channel therebetween (as seen in  FIG. 4 ). This way, gas with low temperature from outside area is able to enter into the inside of the transformer and thus takes away the heat generated by each heating element. 
         [0024]    As shown in  FIG. 7 , in this embodiment, the primary winding  4  may be wound between any two adjacent separation plates  14  or wound between the separation plate  14  and the vertical plate  12 . This may achieve the same effect as previous embodiments do. During the operation, gas with low temperature from outside area goes through the air hole  18  and the spacing gap and then takes away the heat generated by heating elements on the conducting plate  20 .