Patent Publication Number: US-2015070121-A1

Title: Coil component and method of manufacturing the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the priority of Korean Patent Application No. 10-2011-0138143 filed on Dec. 20, 2011, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a coil component and a flat panel display device including the same. 
     2. Description of the Related Art 
     A switching mode power supply (SMPS) is generally used as a power supply for electric and electronic devices such as a display device, a printer, or the like. 
     The SMPS, a module type power supply converting electricity supplied from the outside so as to meet various electric and electronic devices such as a computer, a television (TV), a video cassette recorder (VCR), a switchboard, a wireless communications device, and the like, serves to perform switching control at a high frequency, higher than a commercial frequency, and stabilizes an output by using semiconductor switching characteristics. 
     This SMPS generally includes a line filter in order to improve electromagnetic interference (EMI). The line filter is a coil component in which a coil is wound around a core. As a line filter included in the SMPS according to the related art, a toroidal-type or troidal-type line filter has mainly been used. 
     EMI may be divided into conducted emissions and radiated emissions, each of which may be again classified into differential mode EMI and common mode EMI. 
     Individual common mode line filters (for example, chock coils) need to be used in a live line and a neutral line of power input lines in order to remove the common mode EMI, and at least one differential mode line filter (for example, a chock coil) needs to be separately used in order to remove the differential mode EMI. 
     However, a volume of the SMPS may be increased due to the chock coil for removing the above-mentioned EMI, such that customer demand for product slimness and lightness may not be satisfied. In particular, the SMPS cannot be easily used for slim electronic devices. 
     Further, in the case of the line filter (for example, the chock coil) according to the related art, since an insulating bobbin is assembled with a toroidal core, and two coils are wound around the bobbin in opposing directions, automated production is not possible, such that production speed may be relatively low, thereby causing an increase in manufacturing costs. 
     SUMMARY OF THE INVENTION 
     An aspect of the present invention provides a coil component capable of easily being automatedly manufactured and a method of manufacturing the same. 
     Another aspect of the present invention provides a coil component having a coil wound therearound in a state in which a bobbin, a core, and a base are assembled together and a method of manufacturing the same. 
     Another aspect of the present provides a thin coil component capable of easily being used for slim electronic devices and a method of manufacturing the same. 
     According to an aspect of the present invention, there is provided a coil component, including: a core; at least one bobbin coupled to the core and having a coil wound therearound; and a base having the core seated therein and including an external connection terminal, wherein one side of the core is seated in the base and the other side thereof is exposed to the outside of the base. 
     The bobbin may include: a tubular body part having a through hole formed therein; and flange parts protruded to the outside from both ends of the body part, wherein an outer surface of any one of the flange parts is provided with a gear and the gear is exposed to the outside of the base. 
     The base may include: a core receiving groove in which one side of the core is seated; a bobbin receiving groove in which the bobbin is received; and a stumbling protrusion protruded from an opposite side of the core receiving groove to support the other side of the core. 
     When the bobbin is received in the bobbin receiving groove, the flange part formed with the gear may be exposed to the outside of the base. 
     The base may include a terminal fastening part formed at an outer edge and fastened to the external connection terminal. 
     The terminal fastening part may include at least one lead groove guiding the coil to the external connection terminal. 
     The terminal fastening part may be disposed within a vertical range formed by a diameter of the bobbin. 
     The base may include: a side wall forming an outer contour of the core receiving groove; and a terminal fastening part formed at the outside of the side wall and fastened to the external connection terminal. 
     The terminal fastening part may be disposed within a horizontal range formed by a diameter of the bobbin. 
     Two of the bobbins may be coupled to the core, and the base may be formed with two bobbin receiving grooves corresponding to the two bobbins. 
     The base may include a blocking protrusion protruded while crossing the bobbins between the two bobbin receiving grooves. 
     The stumbling protrusion may support a center of the other side of the core exposed between the two bobbins. 
     According to another aspect of the present invention, there is provided a coil component, including: a core; at least one bobbin coupled to the core, having a coil wound therearound, and a gear formed at one end thereof; and a base having the core seated thereon and including a terminal fastening part fastened to an external connection terminal, wherein the bobbin is disposed so that the gear is exposed to the outside of the base and the terminal fastening part is disposed within a vertical range formed by a diameter of the bobbin. 
     According to another aspect of the present invention, there is provided a coil, including a coil component, including: a core; at least one bobbin coupled to the core and including a winding part having a coil wound therearound and a gear formed at one end of the winding part; and a base including a bobbin receiving groove receiving the winding part and the other end of the bobbin. 
     According to another aspect of the present invention, there is provided a coil, including a method of manufacturing a coil component, including: coupling a bobbin having a gear formed at one end thereof to a core; coupling the core coupled to the bobbin with a base; disposing an assembly including the bobbin, the core and the base assembled with one another, in an automatic winding apparatus; and winding a coil around the bobbin by using the automatic winding apparatus. 
     The coupling of the core with the base may include coupling the core with the base so that the bobbin gear is exposed to the outside of the base. 
     The disposing of the assembly in the automatic winding apparatus may include disposing the assembly so that the gear formed in the automatic winding apparatus is engaged with the gear of the bobbin. 
     The winding of the coil may include winding the coil around the bobbin while rotating the gear formed in the automatic winding apparatus. 
     The method may further include fixedly adhering the bobbin having the coil wound therearound, the core, and the base to one another after the winding of the coil. 
     According to another aspect of the present invention, there is provided a coil component manufactured through anyone of the above-mentioned methods. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is a perspective view schematically showing a line filter according to an embodiment of the present invention; 
         FIG. 2  is a bottom perspective view showing a bottom portion of the line filter shown in  FIG. 1 ; 
         FIG. 3  is a perspective view showing the line filter shown in  FIG. 1  in which the coil is omitted; 
         FIG. 4  is an exploded perspective view of the line filter shown in  FIG. 3 ; 
         FIGS. 5A to 5F  are perspective views for explaining a method of manufacturing a line filter shown in  FIG. 1 ; 
         FIG. 6  is a perspective view schematically showing a line filter according to another embodiment of the present invention; and 
         FIG. 7  is a bottom perspective view of the line filter shown in  FIG. 6 . 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     The terms and words used in the present specification and claims should not be interpreted as being limited to typical meanings or dictionary definitions, but should be interpreted as having meanings and concepts relevant to the technical scope of the present invention based on the rule according to which an inventor can appropriately define the concept of the term to describe appropriately the best method he or she knows for carrying out the invention. Therefore, the configurations described in the embodiments and drawings of the present invention are merely embodiments to be implemented, but do not represent the entire technical spirit of the present invention. Thus, the present invention should be construed as including the changes, equivalents, and substitutions included in the spirit and scope of the present invention at the time of filing this application. 
     Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. At this time, it is noted that like reference numerals denote like elements in appreciating the drawings. Moreover, detailed descriptions related to well-known functions or configurations will be omitted in order not to unnecessarily obscure the subject matter of the present invention. Based on the same reason, it is to be noted that some components shown in the drawings are exaggerated, omitted or schematically illustrated, and the size of each component does not exactly reflect its real size. 
     Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is a perspective view schematically showing a line filter according to an embodiment of the present invention and  FIG. 2  is a bottom perspective view showing a bottom portion of the line filter shown in  FIG. 1 .  FIG. 3  is a perspective view showing the line filter shown in  FIG. 1  in which the coil is omitted and  FIG. 4  is an exploded perspective view of the line filter shown in  FIG. 3 . 
     Referring to  FIGS. 1 to 4 , a coil component according to an embodiment of the present invention, a line filter  100  provided for electromagnetic interference, may include a bobbin  20 , a coil  70 , a core  80 , and a base  50 . 
     As shown in  FIG. 3 , the bobbin  20  includes a tubular body part  22  having a through hole  21  formed at a center thereof and a flange part  23  formed to be vertically extend in an outer diameter direction of the body part  22  from both ends of the body part  22 . 
     The through hole  21  formed in the inner portion of the body part  22  may be used as a path into which a portion of a core  80  to be described below is inserted. The embodiment of the present invention describes a case in which the through hole  21  has a circular cross section by way of example. This has a configuration formed according to a shape of the core  80  inserted into the through hole  21 , but the embodiment of the present invention is not limited thereto. That is, the through hole  21  may be formed in various shapes corresponding to the shape of the core  80  inserted into the through hole  21 . 
     The flange part  23  may be divided into a first flange part  23   a  and a second flange part  23   b  according to a mounted position thereof. In addition, a space formed between an outer peripheral surface of the body part  22  and the first and second flange parts  23   a  and  23   b  may be used as a winding part  28  in which a coil  70  to be described below is wound. Therefore, the flange part  23  may serve to protect the coil  70  from the outside and secure an insulation property therebetween, simultaneously with supporting the coil  70  wound around the winding part  20   a  at both sides thereof. 
     In addition, the line filter  100  according to the present embodiment may include a gear  27  formed on outer surface of the flange part  23  exposed to the outside of the base  50  to be described below. The gear  27  may be formed in a protrusion form protruding outwardly from the outer surface of the flange part  23  and may be formed to have a circular gear shape. 
     The gear  27  according to the embodiment of the present invention may be provided to automatically wind the coil  70  to be described below around the bobbin  20 . This will be described in more detail in the following coil winding method. 
     Further, the line filter  100  according to the embodiment of the present invention may include a barrier rib  24  adjacent to the second flange part  23   b  disposed in the base  50 . Further, the barrier rib  24  may be provided to have at least one insertion groove  25 . 
     The barrier rib  24  and the insertion groove  25  may be provided to fix one end of the coil to the bobbin  20  at the time of winding the coil  70 . Further, the coil winding method will be described in more detail. 
     As shown in  FIG. 4 , the bobbin  20  according to the embodiment of the present invention configured as described above may be formed by being coupled at both sides thereof based on the core  80  so that the core  80  is inserted into the through hole  21 . 
     To this end, the bobbin  20  may be divided into a first bobbin  20   a  and a second bobbin  20   b . The first bobbin  20   a  and the second bobbin  20   b  each show a half of the bobbin  20  formed by cutting the bobbin  20  in a longitudinal direction. Therefore, when the first bobbin  20   a  is coupled to the second bobbin  20   b , a single completed bobbin  20  may be formed. 
     As described above, the bobbin  20  may be configured by being manufactured in the first bobbin  20   a  and the second bobbin  20   b  so as to be coupled to each other. The line filter  100  according to the embodiment of the present invention may be formed in an integral type in which the core  80  without the bonding surface is consecutive. 
     Further, two bobbins  20  according to the embodiment of the present invention may be provided, each of which is coupled to the core  80 . In this case, the two bobbins  20  may be coupled to the core  80  so that the two bobbins  20  are disposed in parallel with each other. 
     The bobbin  20  may be easily manufactured through injection molding, but the embodiment of the present invention is not limited thereto. Therefore, the bobbin  20  may also be manufactured through various methods, such as press machining, or the like. Further, the bobbins  20  according to the present embodiment may be formed of an insulating resin material and a material having high heat resistance and high voltage resistance. 
     As a material of the bobbin  20 , polyphenylenesulfide (PPS), liquid crystal polyester (LCP), polybutyleneterephthalate (PBT), polyethyleneterephthalate (PET), phenolic resin, and the like, may be used. 
     The coil  70  may be wound around the winding part  28  formed in the bobbin  20 . 
     As the coil  70 , a strand of wire may be used and a twisted wire (Ritz Wire) formed by twisting several strands may be used. Lead wires that are an end of the coil  70  may be electrically and physically connected with an external connection terminal  60  provided in the base  50  to be described below. 
     Meanwhile, in the line filter  100  according to the embodiment of the present invention, the coils  70  may be respectively wound around two bobbins  20  in different directions (that is, an opposite direction). For example, when the coil is wound around any one bobbin  20  clockwise, the coil may be wound around the remaining one bobbin  20  anticlockwise. However, the embodiment of the present invention is not limited thereto. Various applications such as winding the coil in an opposite direction thereto, winding the two coils in the same direction, or the like, may be implemented as necessary. 
     The core  80  may be inserted into the through hole  21  formed in the bobbin  20 . 
     As described above, the bobbin  20  according to the embodiment of the present invention may be coupled to the core  80  according to the coupling of the first bobbin  20   a  and the second bobbin  20   b . Therefore, the core  80  according to the embodiment of the present invention may be formed in a consecutively integrated type without a cut portion. 
     In the embodiment of the present invention, a case in which the core  80  has a rectangular shape is described by way of example. Therefore, two bobbins  20  coupled to the core  80  may be disposed to be parallel with each other. In this case, the bobbin  20  may be disposed so that the portions in which the gears  27  are formed have the same direction. 
     In addition, a portion of the core  80  according to the embodiment of the present invention, inserted into the through hole  21  of the bobbin  20 , may be operated as a rotating shaft of the bobbin  20 . Therefore, the portion inserted into the through hole  21  of the bobbin  20  may have a curved outer surface and a cylindrical outer surface so as to facilitate the rotation of the bobbin  20 . 
     Further, as described above, two bobbins  20  may be coupled to the core  80  having a rectangular shape, and a portion of the core  80  connecting two bobbins  20  may be exposed to the outside. 
     Therefore, one side of the exposed portion of the core  80  according to the embodiment of the present invention may be received in a base  50 , and the other side thereof connecting portions in which the gears  27  of the bobbin  20  are formed may be exposed to the outside of the base  50 . 
     The core  80  may be formed of Mn—Zn based ferrite having relatively high permeability, relatively low loss, relatively high saturation magnetic flux density and stability, and relatively low production costs, as compared to other materials. However, in the embodiment of the present invention, a shape or a material of the core  80  is not limited thereto. 
     The inside of the base  50  may be provided with the core  80  to which the bobbin  20  is coupled. Therefore, the base  50  may be formed to have a structure in which a portion of the bobbin  20  may be exposed to the outside for automatic winding while the core  80  is firmly fixed thereto. 
     In more detail, the base  50  according to the embodiment of the present invention may include a bobbin receiving groove  54 , a core receiving groove  55 , a terminal fastening part  52 , an external connection terminal  60 , and a stumbling protrusion  57 . 
     As shown in  FIG. 4 , the bobbin receiving groove  54  may be formed to have a groove form in the inside thereof, corresponding to a shape of the bobbin  20  coupled to the core  80 . In the case of the embodiment of the present invention, two bobbins  20  are provided. Therefore, the bobbin receiving groove  54  may include two grooves. 
     Here, a blocking protrusion  58  may be formed between the two bobbin receiving grooves  54 . The blocking protrusion  58  may be provided to prevent interference between the coils wound around the two bobbins  20  and secure insulation therebetween. To this end, the blocking protrusion  58  may be protruded in a form crossing the space between the bobbins  20  received in the bobbin receiving groove  54 . 
     Meanwhile, the bobbin receiving groove  54  according to the embodiment of the present invention may be formed in a groove of which one end is open. 
     The open end of the bobbin receiving groove  54  may be provided with the first flange part  23   a  on which the gear  27  is formed, in the flange part  23  of the bobbin  20 . As one end of the bobbin receiving groove  54  is open, the bobbin  20  disposed in the bobbin receiving groove  54  may be formed so that the gear  27  is completely exposed to the outside of the bobbin receiving groove  54 . 
     Therefore, the other side of the core  80  exposed to the first flange part  23   a  of the bobbin  20  may be completely exposed to the outside of the base  50 . 
     On the other hand, the second flange part  23   b  without the gear  27  in the flange part  23  of the bobbin  20  may be stably received in the bobbin receiving groove  54 . 
     The core receiving groove  55  may be provided with one side of the core  80  to which the bobbin  20  is coupled. In detail, in the exposed portion thereof between the two bobbins  20 , the portion exposed to the second flange part  23   b  may be seated therein. 
     To this end, the base  50  may include a side wall  56  formed therein, for forming the core receiving groove  55  therein. The side wall  56  may be formed to surround the core  80  along the shape of the core  80 . 
     Therefore, the core  80  may be stably fixed to the inside of the base  50  by the core receiving groove  55 . 
     The terminal fastening part  52  may be formed at the outermost edge portion of the base  50  and the inside thereof may be fastened to at least one external connection terminal  60 . 
     The terminal fastening part  52  according to the embodiment of the present invention may be formed at both respective ends of the bobbin receiving groove  54 . Therefore, the terminal fastening part  52  may be formed to be provided with a portion of the bobbin receiving groove  54 . 
     In particular, the terminal fastening part  52  according to the embodiment of the present invention may be disposed within a range of thickness (d of  FIG. 3 , that is, a diameter of the flange part) range of the bobbin  20 . That is, the terminal fastening part  52  may be disposed at both sides of the bobbin  20  and may be formed so as not to protrude to the top or bottom portion of the bobbin  20 . 
     This is configured to significantly reduce the thickness of the line filter  100  according to the embodiment of the present invention. Since the terminal fastening part  52  is disposed within the thickness range of the bobbin  20 , the whole thickness (that is, height) of the line filter  100  is not increased, that is, not affected by the terminal fastening part  52 . 
     That is, the overall thickness of the line filter  100  according to the embodiment of the present invention may be determined only by a diameter (D of  FIG. 3 ) of the bobbin  20  and a thickness of the base  50  disposed under the bobbin  20 . As shown in the drawing, the base  50  disposed under the bobbin  20  is to form the bobbin receiving part  54  therein and may be formed as thin as possible when the base has rigidity capable of maintaining the shape of the bobbin receiving part  54 . 
     Therefore, since the diameter of the bobbin  20  actually form the whole thickness, the line filter  100  according to the embodiment of the present invention may be relatively very thinly formed even in a case in which the line filter  100  includes the base  50  and the terminal fastening part  52 . 
     In addition, the terminal fastening part  52  according to the embodiment of the present invention may have at least one lead groove  53  formed thereon. The lead groove  53  may be provided to guide the end of the coil  70  wound around the bobbin  20 , that is, lead wires to the external connection terminal  60 . 
     The lead wires of the coil  70  may stably lead to the external connection terminal  60  by the lead groove  53 . Further, the motion of the lead wires may be suppressed due to the insertion of the lead wires into the lead groove  53 . 
     Therefore, after the lead wires are fastened to the external connection terminal  60 , the lead wires may be prevented from moving thereof due to the external force and thus being separated from the external connection terminal  60 . 
     The external connection terminal  60  may protrude to the outside from the terminal fastening part  52  to thus be fastened thereto. 
     The embodiment of the present invention describes, by way of example, the case in which the external connection terminal  60  protrudes downwardly from the terminal fastening part  52 . 
     However, the embodiment of the present invention is not limited thereto. That is, the external connection terminal  60  may be fastened thereto, to horizontally protrude from the terminal fastening part  52 , or may be formed to be bent at a portion thereof. 
     In addition, as shown in  FIG. 2 , the base  50  according to the embodiment of the present invention may include four external connection terminals  60 . This is because the line filter  100  according to the embodiment of the present invention is configured to include two coils  70 . Therefore, the coil component according to the embodiment of the present invention is not limited thereto and may include the external connection terminals  60  of the number corresponding to the number of the included coils  70 . 
     The stumbling protrusion  57  is provided to support the core  80 . 
     The stumbling protrusion  57  may be formed to be protruded from a side of the base, and in more detail, from one end of an open portion of the bobbin receiving groove  54 . 
     The stumbling protrusion  57  may be partially protruded along a horizontal direction from the base  50  and an edge thereof may be formed to have a hook shape protruded toward the top portion of the base  50 . 
     The stumbling protrusion  57  may be formed at an opposite side of the core receiving groove  55  described above. Therefore, in the exposed portion of the core  80  exposed between the bobbins  20 , the stumbling protrusion  57  may support the portion of the core exposed to the first flange part  23   a  of the bobbin  20  side, that is, exposed to the gear  27  side. 
     The stumbling protrusion  57  may support a center of the exposing portion of the core  80  so as to stably support the core  80 . To this end, the stumbling protrusion  57  may be formed to protrude between the two bobbin receive grooves  54 . 
     The line filter  100  according to the present embodiment as described above may be configured to be appropriated for an automated manufacturing method. 
     That is, the line filter  100  according to the embodiment of the present invention may wind the coil  70  around the bobbin  20  by using a separate automatic winding apparatus  90  in a state in which the bobbin  20 , the core  80 , and the base  50  are coupled together. 
     Hereinafter, a method of manufacturing a coil component according to an embodiment of the present invention will be described. Through the following description, the configuration of the above-mentioned line filter  100  will be explicitly described. 
       FIGS. 5A to 5F  are perspective views for explaining a method of manufacturing a line filter shown in  FIG. 1 . 
     Referring to  FIG. 5A , in the method of manufacturing the line filter  100  according to the embodiment of the present invention, the bobbins  20  may be first coupled to the integrally formed core  80 . 
     As described above, the bobbin  20  may be coupled to the core  80  by assembling the first bobbin  20   a  and the second bobbin  20   b  with each other, having the core  80  disposed therebetween. In this case, the bobbin  20  may be rotatably coupled to the core  80 , based on the core  80  as the rotating shaft. 
     Next, as shown in  FIG. 5B , the core  80  coupled to the bobbin  20  may be coupled to the base  50 . In this case, an adhesive may be interposed at a portion between the base  50  and the core  80  in contact with each other, as necessary. Therefore, before the core  80  is coupled, an adhesive may be applied to the inside of the core receiving groove  55 , the inside of the stumbling protrusion  57 , or the like. 
     However, the embodiment of the present invention is not limited thereto. In a case in which coupling force between the core  80  and the base  50  is sufficient, the adhesive may be omitted in the process. 
     Meanwhile, the bobbin  20  needs to be rotatably maintained even in a case in which the core  80  is coupled to the base  50 . Therefore, a bonding member such as an adhesive is not interposed between the bobbin  20  and the base  50 . 
     When the bobbin  20 , the core  80 , and the base  50  are coupled to one another through the above-mentioned process, winding the coil around the bobbin  20  may be performed. Here, the process may be performed by a separate automatic winding apparatus. 
     As shown in  FIGS. 5C and 5D , the assembly in which the bobbin  20 , the core  80 , and the base  50  are coupled to one another may be disposed in the automatic winding apparatus  90 . Further, the assembly is fixed within the automatic winding apparatus  90  by pressing both ends of the assembly. Here,  FIG. 5D  shows a cross section taken along line A-A′ of  FIG. 5C . 
     During the process, the gear  27  of the bobbin  20  may be engaged with a gear  92  protruded in the automatic winding apparatus  90 . 
     Meanwhile, the gear  92  of the automatic winding apparatus  90  may be variously formed as necessary. The embodiment of the present invention describes, byway of example, the case in which the coil  70  is simultaneously wound around the two bobbins  20  in an opposite direction to each other. To this end, the automatic winding apparatus  90  according to the embodiment of the present invention may include four gears  92 . In this case, when rotating force is applied to any one of the two gears  92  disposed on an upper portion, the remaining gears  92  and the bobbins  20  engaged therewith may rotate together. 
     However, the embodiment of the present invention is not limited thereto but may be variously applied. For example, the two bobbins  20  may be configured to rotate in the same direction by using three or five gears. In this case, respective bobbins  20  may be wound with the coil  70  in the same direction. 
     In addition, the line filter  100  according to the embodiment of the present invention may be formed to have a form in which both sides of the bobbin  20  and the top thereof are open. Therefore, the gear  92  of the automatic winding apparatus  90  may be coupled to the gear  27  of the bobbin  20  even in both sides of the bobbin  20  and the top portion of the bobbin  20 . Therefore, the gears  92  of the automatic winding apparatus  90  may be disposed at various positions in various forms, as necessary. 
     Next, as shown in  FIG. 5E , after the coil  70  is fixed to the bobbin  20 , the coil  70  may be wound around the bobbin  20  by rotating the bobbin  20 . The coil  70  may be inserted into a space between the second flange part  23   b  of the bobbin  20  and the barrier rib  24 , to be fixed to the bobbin  20 . In addition, the winding part  28  of the bobbin  20  may be drawn out through the insertion groove  25  formed in the barrier rib  240  so as to be wound around the winding part  28 . 
     The winding of the coil  70  may be performed by rotating the gear  92  of the automatic winding apparatus  90 . That is, when the gear  92  of the automatic winding apparatus  90  is connected with a driving device such as a motor, or the like, and is rotated, the gear  27  of the bobbin  20  engaged with the gear  92  of the automatic winding apparatus  90  may be rotated together. Therefore, each bobbin  20  may be rotated based on the core  80  as the rotating shaft, and thus, the winding part  28  of the bobbin  20  may be wound with the coil  70 . 
     As described above, the line filter  100  according to the embodiment of the present invention may be maintained in a state in which the top portion of the bobbin  20 , that is, both sides and the top portion of the winding part  28  are open, so as to facilitate the winding of the coil  70 . Further, the gear  27  of the bobbin  20  may be exposed to the outside as maximally as possible so that the gear  27  of the bobbin  20  is smoothly engaged with the gear  92  of the automatic winding apparatus  90 . 
     Therefore, the gear  92  of the automatic winding apparatus  90  may be easily engaged with the gear  27  of the bobbin  20  even in the state in which the bobbin  20 , the core  80 , and the base  50  are coupled together, such that the coil  70  may be relatively easily wound around the bobbin  20 . 
     When the winding of the coil  70  is completed, as shown in  FIG. 5F , the end of the coil  70 , that is, the lead wires are fastened to the external connection terminals  60 . That is, the lead wires of the coil  70  may be drawn out to the bottom portion of the base  50  through the corresponding lead groove  53  and each lead wire may be wound around a corresponding external connection terminal  60  to be connected thereto at the bottom portion of the base  50 . Thereafter, bonding the lead wires to the external connection terminals  60  by using melting solder, or the like, may be further performed, as necessary. 
     In addition, fixedly bonding the bobbin  20  to the base  50  by using resin, varnish, or the like, therebetween may be further performed. The bonding may be performed by impregnating the line filter  100  in a solution in which resin, varnish, or the like, is contained. However, the embodiment of the present invention is not limited thereto. That is, various methods such as injecting resin or varnish, spraying resin or varnish in a spray type, or the like, between the bobbin  20  and the base  50  may be used. 
     Through the process, the bobbin  20  around which the coil  70  is wound may be firmly fixed to the core  80  and the base  50  so as not to move. Therefore, the line filter  100  according to the embodiment of the present invention may be completed. 
     As set forth above, in the method of manufacturing a coil component according to the embodiment of the present invention, the coil may be wound in the state in which the bobbin, the core, and the base are assembled together. Therefore, the coil component may be manufactured only by the process of assembling the bobbin, the core, and the base and the process of connecting the coil wound around the bobbin with the external connection terminal. 
     Therefore, the line filter according to the embodiment of the present invention may be easily manufactured, as compared with the method of first winding the coil around the bobbin, assembling the coil with the base, and connecting the coil with the external connection terminal. 
     Further, since the coil may be automatically wound around the bobbin, the time required to wind the coil may be reduced, thereby shortening a manufacturing time. 
     As described above, most of processes of manufacturing the coil component according to the present invention may be automated. Therefore, the costs and time required for manufacturing the coil component may be significantly reduced. 
     In addition, the coil component according to the embodiment of the present invention may be formed to have a form in which the bobbin is completely exposed to the outside from the base. Therefore, the bobbin may be easily engaged with the gear of the automatic winding apparatus even in the state in which the bobbin is coupled to the core and the base, thereby facilitating the winding of the coil. 
     In addition, in the method of manufacturing a coil component according to the embodiments of the present invention, the coil may be formed to have a thickness approximately meeting a diameter of the bobbin. Therefore, the thickness of the coil may be significantly reduced, and thus, the coil may be relatively easily used for slim electronic devices. 
     Meanwhile, as described above, the line filter according to the embodiment of the present invention, a horizontal mounting type, may have a shape suitable for the thin electronic devices. 
     However, the coil component according to the embodiment of the present invention is not limited to the above-mentioned embodiment, but may be variously applied. The coil component according to the embodiment of the present invention to be described below may be formed to have a similar structure to the coil component  100  ( FIG. 1 ) of the above-mentioned embodiment of the present invention and has a difference only in the structure of the base. Accordingly, a detailed description of the same components will be omitted, and the structure of the base will be mainly described in detail. In addition, the same reference numerals will be used to describe the same components as those of the above-mentioned embodiment. 
       FIG. 6  is a perspective view schematically showing a line filter according to another embodiment of the present invention and  FIG. 7  is a bottom perspective view of the line filter shown in  FIG. 6 . 
     Referring to  FIGS. 6 and 7 , the coil component according to the embodiment of the present invention may include the bobbin  20 , the coil (not shown), the core  80 , and the base  50 , similar to the above-mentioned embodiment of the present invention. 
     The coil component according to the embodiment of the present invention may be a vertical mounting type line filter  200  that may be easily used for electronic devices having a relatively high height and a relatively narrow width. Therefore, the bobbin  20  and the core  80  may be coupled to the base  50  in a form in which the longitudinal direction thereof is vertical to a substrate (not shown) on which the line filter is mounted. 
     Here, the configuration of the bobbin  20 , the coil, and the core  80  may be identical to the above-mentioned embodiments of the present invention and thus, a detailed description thereof will be omitted. 
     The base  50  according to the embodiment of the present invention is formed to have a structure similar to the base  50  ( FIG. 3 ) according to the embodiment of the present invention, and has a difference in a position of the terminal fastening part  52 . In more detail, the terminal fastening part  52  of the base  50  may be formed to have a form in which it protrudes to the outside from the side wall  56  of the core receiving groove  55 . 
     As the line filter  200  according to the embodiment of the present invention is formed in a vertical mounting type, the side wall  56  of the core receiving groove  55  may be disposed under the line filter  200 . Therefore, the terminal fastening part  52  may be protruded from the side wall  56  that is located to be adjacent to the substrate (not shown). 
     In this case, similar to the above-mentioned embodiment of the present invention, in order to significantly reduce the thickness (or width) of the line filter  200 , the terminal fastening part  52  according to the embodiment of the present invention may be disposed within the thickness range (D of  FIG. 6 , that is, the diameter of the flange part of the bobbin) of the bobbin  20 . 
     Therefore, in the line filter  200  according to the embodiment of the present invention, the diameter D of the bobbin  20  actually forms the whole thickness (or width). Therefore, even in a case in which the line filter includes the base  50  and the terminal fastening part  52 , the thickness (or width) may be relatively very thin. 
     Further, the terminal fastening part  52  may be disposed within a vertical range (H) of the core  80 . That is, the bottom surface of the terminal fastening part  52  may be disposed at a higher position than the bottom surface of the core  80 . Therefore, the terminal fastening part  52  may be configured so as not to be protruded to the bottom portion of the bobbin  20 , such that the whole height of the line filter  200  may be prevented from increasing due to the terminal fastening part  52 . 
     Therefore, the whole height of the line filter  200  according to the embodiment of the present invention may be determined by the length of the core  80  and therefore, the size thereof may be significantly reduced even in a case in which the line filter  200  includes the base  50 . 
     Meanwhile, the coil component and the method of manufacturing the same according to the present invention described above are not limited to the above-mentioned embodiments, but may be variously applied. For example, the above-mentioned embodiments of the present invention describe, by way of example, the case in which two bobbins are disposed in parallel with each other along the horizontal surface, but the embodiments of the present invention are not limited thereto. That is, the bobbins are disposed in parallel with each other along the vertical surface or may be variously configured such as the case in which only one bobbin is used. 
     In addition, the embodiments of the present invention describe, byway of example, the line filter used for the power supply device, but the embodiments of the present invention are not limited thereto. Therefore, the coil component manufactured through wining the coil around the bobbin may be widely applied to various electronic components and electronic devices. 
     As set forth above, according to the coil component and the method of manufacturing the same according to the embodiments of the present invention, the coil may be wound in a state in which the bobbin, the core, and the base are assembled together. Therefore, the line filter may be manufactured only by the process of assembling the bobbin, the core, and the base and the process of connecting the coil wound around the bobbin with the external connection terminal. 
     Therefore, the line filter may be easily manufactured, as compared with the method of first winding the coil around the bobbin, assembling the coil with the base, and connecting the coil with the external connection terminal. 
     In addition, the coil component according to the embodiments of the present invention has a form in which the bobbin is completely exposed to the outside from the base. Therefore, the bobbin may be easily engaged with the gear of the automatic winding apparatus even in the state in which the bobbin is coupled to the core and the base, thereby facilitating the winding of the coil. 
     In addition, in the method of manufacturing a coil component according to the embodiment of the present invention, the coil may be automatically wound around the bobbin to reduce the time required to wind the coil, thereby shortening a manufacturing time. 
     Therefore, most of processes of manufacturing the line filter according to the embodiments of present invention may be automated, which results in significantly reducing costs and time required for manufacturing the line filter. 
     In addition, in the method of manufacturing a coil component according to the embodiments of the present invention, the thickness of the coil may have a size approximately meeting a diameter of the bobbin. Therefore, the thickness of the coil may be significantly reduced and thus, the coil may be easily used for slim electronic devices. 
     While the present invention has been shown and described in connection with the embodiments, it will be apparent to those skilled in the art that modifications and variations may be made without departing from the spirit and scope of the invention as defined by the appended claims.