Patent Publication Number: US-11043328-B2

Title: Coil component

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to Japanese Patent Application No. 2017-217502 filed Nov. 10, 2017 which is hereby expressly incorporated by reference herein in its entirety. 
     BACKGROUND 
     1. Technical Field 
     The present invention relates to a coil component. 
     2. Related Art 
     In Japanese Publication Number 2005-93564, a coil component, which is configured with a core (a drum core in the Japanese publication), first and second wires (two wires in the Japanese publication), and a plurality of metal terminals (an electrode member in the Japanese publication), is disclosed. Specifically, the core has a shaft part (a winding core part in the Japanese publication) and flange parts (a flange part in the Japanese publication). The flange parts are formed on both ends of the shaft part, respectively. The first and second wires are wound around the shaft part. Further, the plurality of metal terminals are respectively connected to the corresponding wire ends of both ends of the first wire and both ends of the second wire. 
     In regards to the coil component in the Japanese publication, the metal terminal has a vertical part, a bottom part, and a connection part. Specifically, the vertical part is located along an external surface of the flange part. The bottom part is bent along the bottom surface of the flange part. The connection part projects from a position close to an upper end of the vertical part in a horizontal direction as the connection part is slightly away from the core. The wire end is connected to the connection part of the metal terminal. 
     However, with respect to the configuration of the coil component in Japanese Publication Number 2005-93564, the coil component in an axial direction of the shaft part increases in size. 
     In addition, it is considered that the process, in which the wire end is connected to the connection part of the metal terminal by utilizing an automatic winding machine, is extremely complicated. Therefore, in regards to the manufacturing easiness of the coil component, there is still room for improvement. 
     SUMMARY 
     An object of the present invention is to provide a coil component having a configuration that can solve at least one of the problems explained above. 
     In order to achieve the above object, a coil component according to one aspect of the present invention includes: a core that is configured with a shaft and first and second flanges, the first and second flanges being formed at first and second opposite ends of the shaft; first and second wires that are wound around the shaft; and a plurality of metal terminals to which both wire ends of each of the first and second wires are connected, respectively. A notch is formed in both ends in a first direction of an opposite surface of each of the first and second flanges. The opposite surface faces a mounting surface on which the coil component is mounted. The first direction is perpendicular to an axial direction of the shaft. At least part of each of the plurality of metal terminals is disposed in the notch. 
     A coil component according to another aspect of the present invention includes: a core that is configured with a shaft and first and second flanges, the first and second flanges being formed at first and second opposite ends of the shaft; and a plurality of metal terminals to which both wire ends of each of first and second wires are connected, respectively, the first and second wires being wound around the shaft. A notch is formed in both ends in a first direction of an opposite surface of each of the first and second flanges. The opposite surface faces a mounting surface on which the coil component is mounted. The first direction is perpendicular to an axial direction of the shaft. At least part of each of the plurality of metal terminals is disposed in the notch. 
     According to the present invention, at least one of a suppression of the size of a coil component in an axial direction of a shaft and good manufacturing easiness of a coil component can be achieved. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view that shows a coil component viewed from a bottom surface according to a first embodiment of the present invention. A state in which a wire end is entwined to a metal terminal is shown. 
         FIG. 2  is a partial enlarged perspective view of  FIG. 1  according to the first embodiment of the present invention. 
         FIG. 3  is a side view that shows the coil component according to the first embodiment of the present invention. A state in which the wire end is entwined to the metal terminal is shown. 
         FIG. 4  is a partial enlarged perspective view that shows the coil component viewed from the bottom surface according to the first embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 5  is a perspective view that shows the coil component according to the first embodiment of the present invention. A state in which a plate core is provided after welding is conducted is shown. 
         FIG. 6  is a perspective view that shows a coil component viewed from a bottom surface according to a second embodiment of the present invention. A state in which a wire end is provided on a metal terminal is shown. 
         FIG. 7  is a side view that shows the coil component according to the second embodiment of the present invention. A state in which the wire end is provided on the metal terminal is shown. 
         FIG. 8  is a perspective view that shows the coil component viewed from the bottom surface according to the second embodiment of the present invention. A state in which the wire end is crimped and fixed is shown. 
         FIG. 9  is a partial enlarged perspective view that shows the coil component viewed from the bottom surface according to the second embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 10  is a perspective view that shows a coil component viewed from a bottom surface according to a third embodiment of the present invention. A state in which a wire end is provided on a metal terminal is shown. 
         FIG. 11  is a side view that shows the coil component according to the third embodiment of the present invention. A state in which the wire end is provided on the metal terminal is shown. 
         FIG. 12  is a partial enlarged perspective view that shows the coil component viewed from the bottom surface according to the third embodiment of the present invention. A state in which the wire end is crimped and fixed is shown. 
         FIG. 13  is a partial enlarged bottom view that shows the coil component according to the third embodiment of the present invention. A state in which the wire end is crimped and fixed is shown. 
         FIG. 14  is a partial enlarged perspective view that shows the coil component viewed from the bottom surface according to the third embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 15  is a partial enlarged bottom view that shows the coil component according to the third embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 16  is a perspective view that shows a coil component viewed from a bottom surface according to a fourth embodiment of the present invention. A state in which a wire end is provided on a metal terminal is shown. 
         FIG. 17  is a partial enlarged perspective view that shows the coil component viewed from the bottom surface according to the fourth embodiment of the present invention. A state in which the wire end is crimped and fixed is shown. 
         FIG. 18  is a partial enlarged perspective view that shows the coil component viewed from the bottom surface according to the fourth embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 19  is a perspective view that shows a coil component viewed from a bottom surface according to a fifth embodiment of the present invention. A state in which a wire end is provided on a metal terminal is shown. 
         FIG. 20  is a side view that shows the coil component according to the fifth embodiment of the present invention. A state in which the wire end is provided on the metal terminal is shown. 
         FIG. 21  is a partial enlarged perspective view that shows the coil component viewed from the bottom surface according to the fifth embodiment of the present invention. A state in which the wire end is crimped and fixed is shown. 
         FIG. 22  is a partial enlarged perspective view that shows the coil component viewed from the bottom surface according to the fifth embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 23  is a front view that shows the coil component according to the fifth embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 24  is a partial enlarged perspective view that shows a coil component viewed from a bottom surface according to a sixth embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 25  is a perspective view that shows the coil component viewed from a bottom surface according to a seventh embodiment of the present invention. The state in which a wire end is crimped and fixed is shown. 
         FIG. 26  is a side view that shows the coil component according to the seventh embodiment of the present invention. A state in which the wire end is crimped and fixed is shown. 
         FIG. 27  is a partial enlarged perspective view that shows the coil component viewed from the bottom surface according to the seventh embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 28  is a perspective view that shows a coil component viewed from a bottom surface according to an eighth embodiment of the present invention. A state in which the wire end is entwined to the metal terminal is shown. 
         FIG. 29  is a perspective view that shows the coil component according to the eighth embodiment of the present invention. A state is shown after welding is conducted. 
         FIG. 30  is a side view that shows the coil component according to the eighth embodiment of the present invention. A state is shown after welding is conducted. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     As discussed below, embodiments according to the present invention are explained with reference to the drawings. In regards to the drawings, the redundant explanations with respect to the same configurations are omitted but the same reference numerals are used for labeling. 
     First Embodiment 
     First, a first embodiment of the present invention will be explained below with reference to  FIGS. 1-5 . 
       FIG. 1  is a perspective view that shows a coil component  100  viewed from a bottom surface according to a first embodiment of the present invention.  FIG. 2  is a partial enlarged perspective view of  FIG. 1 .  FIG. 3  is a side view that shows the coil component  100 . Each of  FIGS. 1-3  shows a state in which each corresponding wire end (one end  41   a , the other end  41   b , one end  42   a , and the other end  42   b ) of wire ends is entwined to each of metal terminals  30 . 
       FIG. 4  is a partial enlarged perspective view that shows the coil component  100  viewed from the bottom surface and shows a state after welding is conducted. 
       FIG. 5  is a perspective view that shows the coil component  100  and shows a state in which a plate core  20  is provided after welding is conducted. 
     The coil component  100  according to the embodiment of the present invention is configured with a core (a drum core  10 ), first and second wires  41  and  42 , and a plurality of metal terminals  30 . Specifically, the drum core  10  has a shaft part (shaft)  11  (shown in  FIG. 3 ) and flange parts (flanges)  12  that are formed on both ends of the shaft part  11 , respectively. The first and second wires  41  and  42  are wound around the shaft part  11 . Further, each corresponding wire end (any of one end  41   a , the other end  41   b , one end  42   a , and the other end  42   b ) of both ends of the first wire  41  (one end  41   a  and the other end  41   b ) and both ends of the second wire  42  (one end  42   a  and the other end  42   b ) is connected to each of the plurality of metal terminals  30 . In regards to an opposite surface (counterface)  12   a  on the flange part  12  that is provided opposed to a mounting target surface (mounting surface), a notch (cutout) shape part (notch)  13  is respectively formed at both ends in a direction of the opposite surface  12   a  of the flange parts  12 . That direction is orthogonal to the axial direction of the shaft part  11 . At least a part of each of the metal terminals  30  is arranged (stored) at the notch shape part  13 . 
     The phrase “a wire end is connected to the metal terminal  30 ” typically means that the wire end is fixed to the metal terminal  30  by welding so that the wire end is electrically connected to the metal terminal  30  as shown in  FIG. 4 . However, the wire end may also be electrically connected to the metal terminal  30  by simply entwining and crimp fixation (crimping) of the wire end to the metal terminal  30 . 
     The mounting target surface corresponds to a principal surface of an electronic board opposed to the coil component  100 . The coil component  100  is mounted on, and at the same time, has an electronic connection to the electronic board. 
     An entirety or a part of the corresponding metal terminal  30  is provided at each of the notch shape parts  13 . 
     Further, in the following explanations, the axial direction of the shaft part  11  (a crosswise (right and left) direction in  FIG. 3 ) is sometimes simply referred to as “an axial direction.” In addition, conveniently, a side of the mounting target surface is sometimes referred to as “a bottom (lower or below)” and an opposite side thereof is sometimes referred to as “a top (upper or above).” 
     Further, the coil component  100  according to the embodiment of the present invention include not only a state in which the first wire  41  and the second wire  42  are wound around the core and the wire end is connected to the metal terminal  30  by such as the welding as shown in  FIGS. 4 and 5 , but also a state in which the first wire  41  and the second wire  42  are not wound around the core yet (it does not have the first wire  41  and the second wire  42 ). 
     That is, another coil component  100  according to the embodiment of the present invention is configured with the core (the drum core  10 ) and the plurality of metal terminals  30 . Specifically, the drum core  10  has the shaft part  11  and the flange parts  12  that are formed on both ends of the shaft part  11 , respectively. Each corresponding wire end (any of the one end  41   a , the other end  41   b , the one end  42   a , and the other end  42   b ) of both ends of each of the first wire  41  and the second wire  42 , which will be respectively wound around the shaft part  11 , is connected to each of the plurality of metal terminals  30 . In regards to the opposite surface  12   a  on the flange part  12  that is provided opposed to the mounting target surface, the notch shape part  13  is respectively formed at both ends in the direction of the opposite surface  12   a  of the flange parts  12 . That direction is orthogonal to the axial direction of the shaft part  11 . At least a part of each of the metal terminals  30  is arranged at the notch shape part  13 . 
     With respect to the coil component  100  according to the embodiment of the present invention, because at least the part of the metal terminal  30  is provided at the notch shape part  13  being formed in the flange part  12 , the protrusion of the metal terminal  30  from the flange part  12  can be suppressed. As a result, the dimension of the coil component  100  in the axial direction of the shaft part  11  can be reduced (shortened). 
     Further, when the connection of the wire end to the metal terminal  30  is performed by utilizing the space in the notch shape part  13 , the manufacturing easiness of the coil component  100  can be improved. 
     The more detail explanations will be provided below. 
     The drum core  10  is integrally structured with the shaft part  11  and the flange part  12 . The drum core  10  is, for instance, a ferrite core. The shaft part  11  of the drum core  10  is, for instance, formed to be in a substantially rectangular parallelepiped shape. The flange part  12  is formed to be in a substantially rectangular parallelepiped shape and is thin and flat in the axial direction. 
     Each of the flange parts  12  has an inner surface  12   c  being opposed to the other flange part  12 , an outer surface  12   b  facing toward an opposite side of the inner surface  12 , and a reverse surface  12   d  facing toward an opposite side of the opposite surface  12   a  (shown in  FIG. 3 ) in addition to the opposite surface  12   a  that is provided opposed to the mounting target surface. The opposite surface  12   a  is a lower side surface (a bottom surface) of the flange part  12  and the reverse surface  12   d  is an upper side surface (a top surface) of the flange part  12 . 
     As shown in  FIG. 1 , two of the notch shape parts  13  are formed in each of a pair of flange parts  12 . Thus, the coil component  100  has four of the notch shape parts  13  in total. Each of the notch shape parts  13  is a recessed part (recess) that is in a substantially rectangular parallelepiped shape. 
     The notch shape part  13  is shaped by upwardly notching (cutting) the flange  12  from the opposite surface  12   a.    
     As shown in  FIGS. 2 and 4 , the notch shape part  13  has a raised (elected) surface  13   b  and a notch opposite surface (opposing surface)  13   a . Specifically, the raised surface  13   b  is parallel to the axial direction and is orthogonal to the opposite surface  12   a . The notch opposite surface  13   a  is provided opposite to the mounting target surface. Further, the notch opposite surface  13   a  is parallel to the opposite surface  12   a.    
     Each of the notch shape part  13  is formed extending over both ends of each of the flange parts  12  in the axial direction and is open to both sides in the axial direction. 
     Further, in the following explanations, conveniently, an arrangement direction of two of the notch shape parts  13  that is formed in each flange part  12  is sometimes referred to as “a crosswise (right and left) direction.” That is, a pair of left and right notch shape parts  13  are formed in each of the flange parts  12 . 
     A flat recessed part (recess)  14  is formed in the outer surface  12   b  of the flange part  12  and is inwardly recessed toward inside in the axial direction. In the present embodiment, the recessed part  14  is in a toppled T-shape. The recessed part  14  is configured with a vertical direction extension part  14   a  and a horizontal direction extension part  14   b . Specifically, the vertical direction extension part  14   a  extends from the opposite surface  12   a  through the reverse surface  12   d  in a band-like shape in a vertical direction (a longitudinal direction). The horizontal direction extension part  14   b  extends from the vertical direction extension part  14   a  in a direction (a left direction or a right direction) orthogonal to an extending direction of the vertical direction extension part  14   a.    
     A pair of left and right recessed parts  14  are formed on each of the outer surfaces  12   b . The pair of recessed parts  14  are left-right symmetrically provided. A rib that extends from the opposite surface  12   a  through the reverse surface  12   d  in a band-like shape in the vertical direction exists between the pair of recessed parts  14 . 
     A direction in which the horizontal direction extension part  14   b  extends from the vertical direction extension part  14   a  of the left recessed part  14  is a left direction. Further, a direction in which the horizontal direction extension part  14   b  extends from the vertical direction extension part  14   a  of the right recessed part  14  is a right direction. 
     An upper end of the left horizontal direction extension part  14   b  is adjacent to and connected to the left notch opposite surface  13   a . An upper end of the right horizontal direction extension part  14   b  is adjacent to and connected to the right notch opposite surface  13   a.    
     In regards to the left vertical direction extension part  14   a , a left end of an upper portion, which is located upper than the horizontal direction extension part  14   b , is adjacent to and connected to the left raised surface  13   b . In regards to the right vertical direction extension part  14   a , a right end of an upper portion that is locate upper than the horizontal direction extension part  14   b  is adjacent to and connected to the right raised surface  13   b.    
     As shown in  FIGS. 2 and 4 , the metal terminal  30  is configured with a bottom plate  31 , a raised part (raised segment)  34 , a notch opposite surface arrangement section (arrangement plate)  35 , and an entwining part (entwining tab)  36 . Specifically, the bottom plate  31  is provided along the opposite surface  12   a  of the flange part  12 . The raised part  34  rises from the bottom plate  31  along the raised surface  13   b  of the notch shape part  13 . The notch opposite surface arrangement section  35  extends from the raised part  34  along the notch opposite surfaces  13   a  of the notch shape part  13 . The entwining part  36  rises from the notch opposite surface arrangement section  35  and is provided opposite to the raised part  34 . Further, the wire end (one end  41   a  of the first wire  41  in  FIGS. 2 and 4 ) is entwined to the entwining part  36 . 
     In addition, the metal terminal  30  has a flat base part (external plate)  32  and a weld part (weld tab)  33 . Specifically, the flat base part  32  is provided in the recessed part  14  and is orthogonal to the axial direction. The weld part  33  rises from the flat base part  32  toward a side of the mounting target surface. 
     The metal terminal  30  is, for instance, manufactured by punching (blanking) and bending methods for a conductive metal plate. Therefore, each part of the metal terminals  30  is formed in a plate-like shape. 
     The entirety of the flat base part  32  is formed in a flat plate shape. The flat base part  32  is formed in the same shape as the recessed part  14 . That is, the flat base part  32  is configured with a vertical direction extension part  32   a  that has the same shape as the vertical direction extension part  14   a  and a horizontal direction extension part  32   b  that has the same shape as the horizontal direction extension part  14   b . The vertical direction extension part  32   a  is provided in the vertical direction extension part  14   a  and the horizontal direction extension part  32   b  is provided in the horizontal direction extension part  14   b.    
     The weld part  33  is provided on the same plane as the flat base part  32 . The weld part  33  upwardly rises from the tip part of the horizontal direction extension part  32   b  toward a side of the mounting target surface. The weld part  33  is separated from the vertical direction extension part  32   a . The weld part  33  is provided at a position that is adjacent to an external side in the axial direction relative to the notch shape part  13 . Further, the weld part  33  is provided at the external side in the axial direction with respect to the entwining part  36 . 
     A constricted part  33   a  is formed in the weld part  33 . The constricted part  33   a  is more constricted as compared with other areas around the constricted part  33   a  in the weld part  33  (a width of the constricted part  33   a  is narrower in the right and left direction than others). 
     After the first wire  41  and the second wire  42  are wound around the shaft part  11 , the wire end (for example, one end  41   a ) is entwined to the constricted part  33   a  as shown in  FIG. 2 . 
     Because the wire end is entwined to the constricted part  33   a  in the weld part  33 , it can be suppressed that the wire end being entwined to the weld part  33  is detached from the weld part  33 . 
     The bottom plate  31  is bent substantially perpendicularly to the flat base part  32 . The bottom plate  31  is, for instance, formed in a substantially rectangular shape. The bottom plate  31  is provided on the opposite surface  12   a  at a position that is adjacent to the raised surface  13   b . The bottom plate  31  is, for instance, provided on an entire area between both ends of the opposite surface  12   a  in the axial direction. 
     The left raised part  34  is continuously connected to the left end of the left bottom plate  31  and is bent substantially perpendicularly to this bottom plate  31 . The right raised part  34  is continuously connected to the right end of the right bottom plate  31  and is bent substantially perpendicularly to this bottom plate  31 . Further, specifically, each of the raised parts  34  is continuously connected to the inner side portion with respect to the axial direction at each of the bottom plates  31 . 
     “The raised part  34  rises from the bottom plate  31  along the raised surface  13   b ” means that the raised part  34  upwardly rises from the bottom plate  31 , and at the same time, the raised part  34  is provided along the raised surface  13   b.    
     Each of the notch opposite surface arrangement sections  35  is continuously connected to the upper end of each of the raised parts  34  and is bent substantially perpendicularly to each of the raised parts  34 . 
     The left notch opposite surface arrangement section  35  extends from the raised part  34  to the left side and is provided along the left notch opposite surfaces  13   a . The right notch opposite surface arrangement section  35  extends from the raised part  34  to the right side and is provided along the right notch opposite surfaces  13   a.    
     The left entwining part  36  is continuously connected to the left end of the left notch opposite surface arrangement section  35  and is bent substantially perpendicularly to this notch opposite surface arrangement section  35 . The right entwining part  36  is continuously connected to the right end of the right notch opposite surface arrangement section  35  and is bent substantially perpendicularly to this notch opposite surface arrangement section  35 . 
     Each of the entwining parts  36  downwardly extends from the notch opposite surface arrangement section  35 . 
     The constricted part  36   a  is formed in the entwining part  36 . The constricted part  36   a  is more constricted as compared with other areas around the constricted part  36   a  in the entwining part  36  (a width of the constricted part  36   a  is narrower in the axial direction than others). 
     After the first wire  41  and the second wire  42  are wound around the shaft part  11 , as shown in  FIG. 2 , the wire end (one end  41   a , for example) is entwined to the constricted part  36   a.    
     Because the wire end is entwined to the constricted part  36   a  in the entwining part  36 , it can be suppressed that the wire end being entwined to the entwining part  36  is detached from the entwining part  36 . 
     In the present embodiment, the entirety of each of the entwining parts  36  is provided at each of the notch shape parts  13 . More specifically, in regards to each of the metal terminals  30 , the raised part  34 , the notch opposite surface arrangement section  35 , and the entirety of the entwining part  36  are provided at each of the notch shape parts  13 . 
     The raised part  34 , the notch opposite surface arrangement section  35 , and the entwining part  36  are provided at the inner side portion with respect to the axial direction at the notch shape part  13 . 
     In each of the notch shape parts  13 , the part including the raised part  34 , the notch opposite surface arrangement section  35 , and the entwining part  36  is configured by bending a band-shaped metal piece. 
     For instance, with respect to the left end of the left bottom plate  31 , a cut part  31   a  is formed at a position corresponding to a connection part at which the left raised part  34  and the left bottom plate  31  are connected. Further, with respect to the right end of the right bottom plate  31 , the cut part  31   a  is formed at a position corresponding to a connection part at which the right raised part  34  and the right bottom plate  31  are connected. 
     As shown in  FIG. 3 , for instance, a tip  33   b  of the weld part  33  is located above the bottom plate  31 , and more specifically, is located above the opposite surface  12   a.    
     Further, a tip  36   b  of the entwining part  36  is also located above the bottom plate  31 , and more specifically, is located above the opposite surface  12   a.    
     However, the tip  33   b  is, for instance, located below the tip  36   b.    
     The metal terminal  30  is attached to and fixed on the flange part  12  by, for instance, an adhesive. 
     As shown in  FIG. 5 , the coil component  100  has further a plate core  20  being provided at the drum core  10 . The plate core  20  is, for instance, formed in a rectangular and flat plate shape. The plate core  20  is installed between the reverse surfaces  12   d  (refer to  FIG. 3 ) of the pair of the flange parts  12 . The plate core  20  is also, for instance, a ferrite core. 
     As explained above, in the present embodiment, the metal terminal  30  is configured with the entwining part  36  to which the wire end is entwined and the weld part  33  to which the wire end is welded. The entwining part  36  is provided at the notch shape part  13 . 
     Because the entwining part  36  is provided at the notch shape part  13 , the protrusion of the metal terminal  30  from the flange part  12  can be suppressed. As a result, the dimension of the coil component  100  in the axial direction of the shaft part  11  can be reduced (shortened). Further, the wire end can be easily entwined to the entwining part  36  by utilizing the space in the notch shape part  13 . In addition, because the metal terminal  30  has the entwining part  36  and the weld part  33 , the wire end can be more stably connected to the metal terminal  30 . 
     Further, the wire end between the entwining part  36  and the weld part  33  is a so-called aerial wiring. However, because the wire end is also entwined to the weld part  33  after being entwined to the entwining part  36 , the tension of the wire end between the entwining part  36  and the weld part  33  can be reduced. In other words, the tension of the wire end can be dispersed to the entwining part  36  and the weld part  33 . As a result, the damage and the disconnection (breaking) of the wire end such as at the time of the welding can be suppressed. 
     Further, on a surface (the outer surface  12   b ) of the external side in the axial direction of the flange parts  12 , the flat recessed part  14 , which is inwardly recessed toward the inside in the axial direction, is formed. The metal terminal  30  has the flat base part  32  that is provided at the recessed part  14  and that is orthogonal to the axial direction. The weld part  33  downwardly rises from the flat base part  32  toward a side of the mounting target surface and is provided at a position that is adjacent to the external side in the axial direction relative to the notch shape part  13 . 
     Because the flat base part  32  of the metal terminal  30  is provided at the recessed part  14 , the protrusion of the metal terminal  30  from the flange part  12  can be suppressed. As a result, the dimension of the coil component  100  in the axial direction of the shaft part  11  can be reduced (shortened). Further, because the weld part  33  is provided at a position that is adjacent to the external side in the axial direction relative to the notch shape part  13 , the wire end is easily routed to the weld part  33  and the wire end can be welded to this weld part  33  after the wire end is entwined to the entwining part  36  that is provided at the notch shape part  13 . 
     The coil component  100  is, for instance, a common mode choke coil. 
     Next, an example of the procedure to manufacture the coil component  100  will be explained below. 
     First, as shown in  FIGS. 1-3 , the first wire  41  and the second wire  42  are wound around the shaft part  11  (refer to  FIG. 3 ). The one end  41   a  and the other end  41   b  of the first wire  41  and the one end  42   a  and the other end  42   b  of the second wire  42  are sequentially entwined to the entwining part  36  and the weld part  33  of the corresponding metal terminal  30 . 
     For instance, the one end  41   a  and the other end  41   b  of the first wire  41  are respectively entwined to two of the metal terminals  30  that is obliquely opposed to each other. Further, the one end  42   a  and the other end  42   b  of the second wire  42  are respectively entwined to remaining two of the metal terminals  30 . 
     Further, in regards to each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a , and the other end  42   b ), the part of the tip side beyond the portion that is entwined to each of the weld parts  33  is held by an external jig (not shown). 
     Next, by irradiating a laser beam to each of the weld parts  33 , the weld part  33  and each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a  and the other end  42   b ) are welded. As a result, the tip part of the weld part  33  (for instance, the part of the tip side beyond the constricted part  33   a ) and the wire end that is entwined to the weld part  33  are melted and integrated so that a weld ball  50  (shown in  FIG. 4 ) is formed. An irradiation direction of the laser beam is, for instance, an upward direction from below. 
     As explained above, each of the wire ends is welded and is electrically respectively connected to the corresponding metal terminal  30 . 
     Next, the plate core  20  is installed between the reverse surfaces  12   d  (refer to  FIG. 3 ) of the pair of the flange parts  12 . The plate core  20  is attached to and fixed on the flange parts  12  by, for instance, an adhesive. As a result, the coil component  100  (shown in  FIG. 5 ) that has the drum core  10  and the plate core  20  can be obtained. 
     Second Embodiment 
     Next, a second embodiment of the present invention will be explained below with reference to  FIGS. 6-9 . 
       FIG. 6  is a perspective view that shows the coil component  100  viewed from a bottom surface according to the second embodiment of the present invention.  FIG. 7  is a side view that shows the coil component  100  according to the second embodiment of the present invention.  FIGS. 6 and 7  show the states in which the wire ends are provided at the metal terminals  30 .  FIG. 8  is a perspective view that shows the coil component  100  viewed from the bottom surface according to the second embodiment of the present invention. FIG.  8  shows a state in which the wire ends are crimped and fixed.  FIG. 9  is a partial enlarged perspective view that shows the coil component  100  viewed from the bottom surface according to the second embodiment of the present invention.  FIG. 9  shows a state in which the welding is already performed. 
     The coil component  100  according to the present embodiment is different from the coil component  100  according to the first embodiment explained above with respect to the configuration of the metal terminal  30 . In other respects (configurations), the coil component  100  according to the present embodiment is configured in the same way as the coil component  100  according to the first embodiment explained above. 
     In the present embodiment, the metal terminal  30  does not have the horizontal direction extension part  32   b  and the weld part  33  (shown in  FIG. 2 ). That is, the flat base part  32  is configured by the vertical direction extension part  32   a  explained in the first embodiment. 
     Instead, the metal terminal  30  has an axial direction extension part (axial direction extension plate)  37  (shown in  FIG. 9 , etc.), an outer extension part  38  (shown in  FIG. 6 , etc.), and a crimp piece (crimp tip)  39  (shown in  FIG. 9 , etc.). 
     As shown in, for example,  FIG. 6 , the axial direction extension part  37  outwardly extends from the notch opposite surface arrangement section  35  to the external side in the axial direction. More specifically, for instance, the axial direction extension part  37  has a part that is provided along the notch opposite surfaces  13   a  and a part that projects from such part to the external side in the axial direction (i.e., a part that projects from the flange part  12  to the external side in the axial direction). The axial direction extension part  37  is provided on the same plane as the notch opposite surface arrangement section  35 . 
     The outer extension part  38  laterally extends from a projection part of the axial direction extension part  37  that projects from the flange part  12  to the external side in the axial direction. The left outer extension part  38  extends from the left axial direction extension part  37  to the left side and the right outer extension part  38  extends from the right axial direction extension part  37  to the right side. 
     The crimp piece  39  is continuously connected to a tip part in an extending direction of the outer extension part  38 . 
     The crimp piece  39  is the part in which the wire end is crimped and fixed, and is welded. After the wire end is crimped and fixed by the crimp piece  39 , the wire end is welded to the crimp piece  39 . 
     As shown in  FIGS. 6 and 7 , in a state in which the crimp fixation of the wire end by utilizing the crimp piece  39  is not performed yet, the crimp piece  39  is in the state in which the crimp piece  39  downwardly rises from the tip part of the outer extension part  38  in the extending direction. In this state, the crimp piece  39  is, for instance, bent substantially perpendicularly to the axial direction extension part  37  and the outer extension part  38 . In this state, the crimp piece  39  has, for instance, a weld piece  39   a  that projects to the external side in the axial direction than the axial direction extension part  37  and the outer extension part  38 . Further, in this state, an angle formed between the crimp piece  39  and the axial direction extension part  37  and the outer extension part  38  can be greater than 90 degrees. It is more preferable that the angle is 100 degrees or greater. 
     The crimp piece  39  is, for instance, formed in a substantially rectangular shape. 
     As shown in  FIG. 8 , in a state in which the crimp fixation of the wire end by utilizing the crimp piece  39  is already performed, the crimp piece  39  is in a folded-back shape that is obtained by being folded back from the axial direction extension part  37  (via the outer extension part  38 ). That is, the crimp piece  39  and the axial direction extension part  37  are opposed to each other while sandwiching the wire end. As a result, the wire end is crimped and fixed by being held by the crimp piece  39 , and the outer extension part  38  or the axial direction extension part  37 . 
     As explained above, the crimp piece  39  is in the folded-back shape that is obtained by being folded back from the edge of the axial direction extension part  37  in the direction orthogonal to the axial direction, and as a result, the wire end is crimped and fixed. 
     The left crimp piece  39  is folded back from the left edge at the tip part (the end of the external side in the axial direction) of the axial direction extension part  37 . The right crimp piece  39  is folded back from the right edge at the tip part (the end of the external side in the axial direction) of the axial direction extension part  37 . 
     As shown in  FIG. 9 , in a state in which the welding is already performed, a part (for instance, the weld piece  39   a ) of the crimp piece  39  is melted and integrated with the wire end. As a result, a weld ball  50  is formed. 
     Note that a tip part of the axial direction extension part  37  together with the crimp piece  39  (for instance, the weld piece  39   a ) can also be melted and integrated with the wire end by the welding. Further, a part of the outer extension part  38  can also be melted and integrated with the wire end by the welding. 
     In the present embodiment, the tip part of the external side in the axial direction of at least one of the crimp piece  39  and the axial direction extension part  37  is the weld portion. 
     However, the present invention is not limited to the above features. Specifically, the tip part of the axial direction extension part  37 , not the crimp piece  39 , can also be melted and integrated with the wire end by the welding. 
     Further, in the first embodiment explained above, the entwining part  36  has the constricted part  36   a  (shown in  FIG. 3 , etc.). On the other hand, in the present embodiment, the entwining part  36  does not have the constricted part  36   a  and the tip part (the end part) of the entwining part  36  has a projection  36   c  that projects to the external side in the axial direction. As a result, it is suppressed that the wire end being entwined to the entwining part  36  is detached from the entwining part  36 . 
     As explained above, the notch shape part  13  has the raised surface  13   b  and the notch opposite surfaces  13   a . Specifically, the raised surface  13   b  is parallel to the axial direction and is orthogonal to the opposite surface  12   a . The notch opposite surfaces  13   a  is provided opposed to the mounting target surface. The metal terminal  30  has the bottom plate  31 , the raised part  34 , the notch opposite surface arrangement section  35 , the entwining part  36 , the axial direction extension part  37 , and the crimp piece  39 . Specifically, the bottom plate  31  is provided along the opposite surface  12   a  of the flange part  12 . The raised part  34  rises from the bottom plate  31  along the raised surface  13   b  of the notch shape part  13 . The notch opposite surface arrangement section  35  extends from the raised part  34  along the notch opposite surfaces  13   a  of the notch shape part  13 . The entwining part  36  rises from the notch opposite surface arrangement section  35  and is provided opposite to the raised part  34 . Further, the wire end is entwined to the entwining part  36 . The axial direction extension part  37  extends from the notch opposite surface arrangement section  35  in the axial direction. The crimp piece  39  is in the folded-back shape that is obtained by being folded back from the axial direction extension part  37  so that the wire end is crimped and fixed by the crimp piece  39 . The entwining part  36  is provided at the notch shape part  13 , and the wire end is welded to the tip part of the external side in the axial direction of at least one of the crimp piece  39  and the axial direction extension part  37 . 
     Thus, after the wire end is entwined to the entwining part  36 , and furthermore, after the wire end is crimped and fixed by the crimp piece  39 , the wire end can be welded. Therefore, the welding of the wire end can be stably performed. 
     Further, because the wire end is crimped and fixed by the crimp piece  39  after the wire end is entwined to the entwining part  36 , the tension of the wire end between the entwining part  36  and the crimp piece  39  can be reduced. In other words, the tension of the wire end can be dispersed to the entwining part  36  and the crimp piece  39 . As a result, the damage and the disconnection (breaking) of the wire end such as at the time of the welding can be suppressed. 
     In the present embodiment, the wire end can be connected to the metal terminal  30  by the welding in a state in which the wire end is entwined to the entwining part  36 , and furthermore, is crimped and fixed by the crimp piece  39 . Therefore, the wire end can be more stably connected to the metal terminal  30 . 
     Further, as shown in  FIG. 7 , the crimp piece  39  is provided at the external side in the axial direction than the portion (the horizontal direction extension part  14   b ) that is adjacent to the notch opposite surfaces  13   a  on the surface (the outer surface  12   b ) of the flange part  12  at the external side in the axial direction. 
     Therefore, the work in which the wire end is crimped and fixed by bending the crimp piece  39  can be easily performed without the interference of such as the flange part  12 . 
     More specifically, the crimp piece  39  is, for instance, provided at the external side in the axial direction than the flat base part  32 . 
     Further, though an illustration is omitted from the drawings, even in the present embodiment, the coil component  100  has the plate core  20  (refer to  FIG. 5 ). 
     Next, an example of the procedure to manufacture the coil component  100  according to the present embodiment will be explained below. 
     First, as shown in  FIGS. 6 and 7 , the first wire  41  and the second wire  42  are wound around the shaft part  11 . The one end  41   a  and the other end  41   b  of the first wire  41  and the one end  42   a  and the other end  42   b  of the second wire  42  are entwined to the corresponding entwining part  36  of the corresponding metal terminal  30  and are arranged along the outer extension part  38  or the axial direction extension part  37 . 
     Further, in regards to each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a , and the other end  42   b ), the part of the tip side beyond the portion that is provided along the outer extension part  38  or the axial direction extension part  37  is held by an external jig (not shown). 
     Next, as shown in  FIG. 8 , each of the crimp pieces  39  is bent toward the axial direction extension part  37  (via the outer extension part  38 ) and each of the wire ends is crimped and fixed. 
     Next, for instance, by irradiating a laser beam to the weld piece  39   a  of each of the metal terminals  30 , the weld piece  39   a  and each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a , and the other end  42   b ) are welded. As a result, the weld ball (shown in  FIG. 9 ) is formed. The irradiation direction of the laser beam is, for instance, the upward direction from below. As explained above, each of the wire ends is welded to and is electrically connected to the corresponding metal terminal  30 . 
     Thereafter, in the same way as the first embodiment, the plate core  20  is fixed to the drum core  10 . As a result, the coil component  100  that has the drum core  10  and the plate core  20  can be obtained. 
     Third Embodiment 
     Next, a third embodiment of the present invention will be explained below with reference to  FIGS. 10-15 . 
       FIG. 10  is a perspective view that shows a coil component  100  viewed from a bottom surface according to a third embodiment of the present invention.  FIG. 11  is a side view that shows the coil component  100  according to the third embodiment of the present invention.  FIG. 11  shows a state in which a wire end is arranged at a corresponding metal terminal  30 .  FIG. 12  is a partial enlarged perspective view that shows the coil component  100  viewed from the bottom surface according to the third embodiment of the present invention.  FIG. 12  shows a state in which the wire end is crimped and fixed.  FIG. 13  is a partial enlarged bottom view that shows the coil component  100  according to the third embodiment of the present invention.  FIG. 13  shows a state in which the wire end is crimped and fixed.  FIG. 14  is a partial enlarged perspective view that shows the coil component  100  viewed from the bottom surface according to the third embodiment of the present invention.  FIG. 15  is a partial enlarged bottom view that shows the coil component  100  according to the third embodiment of the present invention.  FIGS. 14 and 15  respectively show a state in which the welding is already performed. 
     The coil component  100  according to the present embodiment is different from the coil component  100  according to the second embodiment explained above with respect to the configuration of the metal terminal  30 . In other respects (configurations), the coil component  100  according to the present embodiment is configured in the same way as the coil component  100  according to the second embodiment explained above. 
     In the present embodiment, the metal terminal  30  does not have the entwining part  36  (shown in  FIG. 6 , etc.) and the crimp piece  39 . 
     Instead, the metal terminal  30  has a folding piece  61  explained below. 
     The folding piece  61  is continuously connected to the tip part in the extending direction of the outer extension part  38  extending from the axial direction extension part  37 . The folding piece  61  of the left metal terminal  30  is continuously connected to the left end of the outer extension part  38 , and the folding piece  61  of the right metal terminal  30  is continuously connected to the right end of the outer extension part  38 . 
     However, the present invention is not limited to the above features. The folding piece  61  can be continuously connected to the notch opposite surface arrangement section  35  and the outer extension part  38 . Further, the folding piece  61  can also be continuously connected to the notch opposite surface arrangement section  35 . 
     The folding piece  61  has a first crimp piece  63 , a second crimp piece  62 , and a connection portion  64 . Specifically, the second crimp piece  62  is provided at the external side in the axial direction than the first crimp piece  63 . The connection portion  64  connects between the second crimp piece  62  and the first crimp piece  63 . A cut part  65  is formed at a position corresponding to the connection portion  64  in the folding piece  61 . 
     The wire end is crimped and fixed at the first crimp piece  63 . 
     The wire end is crimped and fixed, and further welded at the second crimp piece  62 . After the wire end is crimped and fixed by the second crimp piece  62 , the wire end is welded to, for instance, the second crimp piece  62 , the outer extension part  38 , and the first crimp piece  63 . 
     As shown in  FIGS. 10 and 11 , in a state in which the crimp fixation of the wire end by utilizing the first crimp piece  63  and the second crimp piece  62  by folding back the folding piece  61  is not performed, the folding piece  61  is in a state in which the folding piece  61  downwardly rises from the tip part in the extending direction of the outer extension part  38 . In this state, the folding piece  61  is, for instance, bent substantially perpendicularly to the axial direction extension part  37  and the outer extension part  38 . Further, in this state, an angle formed between the folding piece  61 , and the axial direction extension part  37  and the outer extension part  38  can be greater than 90 degrees. It is more preferable that the angle is 100 degrees or greater. 
     As shown in  FIGS. 12 and 13 , in a state in which the crimp fixation of the wire end by utilizing the first crimp piece  63  and the second crimp piece  62  is already performed, the folding piece  61  is in a folded-back shape that is obtained by being folded back from the axial direction extension part  37  (via the outer extension part  38 ). That is, the folding piece  61  and the axial direction extension part  37  are opposed to each other so as to sandwich the wire therebetween. As a result, the wire end is crimped and fixed by the first crimp piece  63  and the axial direction extension part  37 , and at the same time, the wire end is crimped and fixed by the second crimp piece  62  and the axial direction extension part  37 . 
     As explained above, the folding piece  61  is in the folded-back shape that is obtained by being folded back from the edge of the axial direction extension part  37  in the direction orthogonal to the axial direction toward an axial center side (inside) of the axial direction extension part  37  so that the wire end is crimped and fixed. 
     The left folding piece  61  is folded back from the left edge to the right edge of the axial direction extension part  37  (via the outer extension part  38 ). The right folding piece  61  is folded back from the right edge to the left edge of the axial direction extension part  37  (through the outer extension part  38 ). 
     However, the present invention is not limited to the above features. At least the first crimp piece  63  of the folding piece  61  can be in the folded-back shape that is obtained by being folded back from the notch opposite surface arrangement section  35  and the axial direction extension part  37 , or can also be in the folded-back shape that is obtained by being folded back from the notch opposite surface arrangement section  35 . 
     As shown in  FIGS. 14 and 15 , in a state in which the welding is already performed, for instance, because parts of each of the second crimp pieces  62 , the outer extension part  38 , and the axial direction extension part  37  are melted and integrated with the wire end, a weld ball  50  is formed. 
     However, the present invention is not limited to the above features. Specifically, only a part of the second crimp piece  62  can be melted and integrated with the wire end by the welding, or only a part of the axial direction extension part  37  can be melted and integrated with the wire end by the welding. 
     As explained above, the notch shape part  13  has the raised surface  13   b  and the notch opposite surface  13   a . Specifically, the raised surface  13   b  is parallel to the axial direction and is orthogonal to the opposite surface  12   a . The notch opposite surfaces  13   a  is provided opposed to the mounting target surface. The metal terminal  30  has the bottom plate  31 , the raised part  34 , the notch opposite surface arrangement section  35 , and the axial direction extension part  37 . Specifically, the bottom plate  31  is provided along the opposite surface  12   a  of the flange part  12 . The raised part  34  rises from the bottom plate  31  along the raised surface  13   b  of the notch shape part  13 . The notch opposite surface arrangement section  35  extends from the raised part  34  along the notch opposite surfaces  13   a  of the notch shape part  13 . The axial direction extension part  37  extends from the notch opposite surface arrangement section  35  in the axial direction. The wire end is fixed by the welding at the position that is located at the external side in the axial direction and at the tip side of the axial direction extension part  37  of the metal terminal  30 . 
     Note that the phrase “at the position that is located at the external side in the axial direction and at the tip side of the axial direction extension part  37  of the metal terminal  30 ” means that a part of the axial direction extension part  37  can be included, or a part of the axial direction extension part  37  cannot be included. That is, for instance, it is also possible that only a part of the second crimp piece  62  can be included. In the present embodiment, for instance, as explained above, the wire end is welded to the parts of each of the second crimp piece  62 , the outer extension part  38 , and the axial direction extension part  37 . 
     Further, the metal terminal  30  has the first crimp piece  63  and the second crimp piece  62 . The first crimp piece  63  is in the folded-back shape that is obtained by being folded back from at least one of the axial direction extension part  37  and the notch opposite surface arrangement section  35  so that the wire end is crimped and fixed. The second crimp piece  62  is in the folded-back shape that is obtained by being folded back from the axial direction extension part  37  so that the wire end is crimped and fixed. The second crimp piece  62  is provided at the external side in the axial direction than the first crimp piece  63 . The wire end is welded to the end of the external side in the axial direction of at least one of the second crimp piece  62  and the axial direction extension part  37 . 
     Further, because the wire end is respectively crimped and fixed by the first crimp piece  63  and the second crimp piece  62 , the tension of the wire end between the first crimp piece  63  and the second crimp piece  62  can be reduced. In other words, the tension of the wire end can be dispersed to the first crimp piece  63  and the second crimp piece  62 . As a result, the damage and the disconnection (breaking) of the wire end such as at the time of the welding can be suppressed. 
     In the present embodiment, the end of the external side in the axial direction of the second crimp piece  62  and the end of the external side in the axial direction of the axial direction extension part  37  are flush with each other. Therefore, it is easily performed that the wire end is welded by melting not only the second crimp piece  62 , but also the axial direction extension part  37 . 
     However, the present invention is not limited to the above features. It is also possible that the axial direction extension part  37  projects toward the external side in the axial direction than the second crimp piece  62 . 
     As shown in  FIG. 11 , the second crimp piece  62  is provided at the external side in the axial direction than the portion (the horizontal direction extension part  14   b ) that is adjacent to the notch opposite surfaces  13   a  on the surface (the outer surface  12   b ) of the flange part  12  at the external side in the axial direction. 
     Further, the first crimp piece  63  and the second crimp piece  62  are respectively configured by parts of the folding piece  61 . The folding piece  61  is in the folded-back shape that is obtained by being folded back from at least one of the axial direction extension part  37  and the notch opposite surface arrangement section  35 . Therefore, because the folding piece  61  is bolded back, the crimp fixations by both the first crimp piece  63  and the second crimp piece  62  can be performed at one time. 
     Further, though an illustration is omitted from the drawings, even in the present embodiment, the coil component  100  has the plate core  20  (refer to  FIG. 5 ). 
     Next, an example of the procedure to manufacture the coil component  100  according to the present embodiment will be explained below. 
     First, as shown in  FIGS. 10 and 11 , the first wire  41  and the second wire  42  are wound around the shaft part  11 . The one end  41   a  and the other end  41   b  of the first wire  41  and the one end  42   a  and the other end  42   b  of the second wire  42  are arranged along the corresponding axial direction extension part  37  of the corresponding metal terminal  30 . 
     Further, in regards to each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a  and the other end  42   b ), the part of the tip side of the wire end beyond the portion that is provided along the axial direction extension part  37  is held by an external jig (not shown). 
     Next, as shown in  FIGS. 12 and 13 , each of the folding pieces  61  is bent to the axial direction extension part  37  (via the outer extension part  38 ) so that each of the wire ends is crimped and fixed by the first crimp piece  63  and the second crimp piece  62 . 
     Next, for instance, by irradiating a laser beam to the end of the external side of the second crimp piece  62  in the axial direction of each of the metal terminals  30 , parts of each of the second crimp piece  62 , the axial direction extension part  37 , and the outer extension part  38 , and each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a , and the other end  42   b ) are welded. As a result, the weld ball (shown in  FIGS. 14 and 15 ) is formed. The irradiation direction of the laser beam is, for instance, the upward direction from below. As explained above, each of the wire ends is welded to and is electrically connected to the corresponding metal terminal  30 . 
     Thereafter, in the same way as the first embodiment, the plate core  20  is fixed to the drum core  10 . As a result, the coil component  100  that has the drum core  10  and the plate core  20  can be obtained. 
     Fourth Embodiment 
     Next, a fourth embodiment of the present invention will be explained below with reference to  FIGS. 16-18 . 
       FIG. 16  is a perspective view that shows the coil component  100  viewed from a bottom surface according to a fourth embodiment of the present invention.  FIG. 16  shows a state in which a wire end is arranged at the metal terminal  30 .  FIG. 17  is a partial enlarged perspective view that shows the coil component  100  viewed from the bottom surface according to the fourth embodiment of the present invention.  FIG. 17  shows a state in which the wire end is crimped and fixed.  FIG. 18  is a partial enlarged perspective view that shows the coil component  100  viewed from the bottom surface according to the fourth embodiment of the present invention.  FIG. 18  shows a state in which the welding is already performed. 
     The coil component  100  according to the present embodiment is different from the coil component  100  according to the third embodiment explained above with respect to the configuration of the metal terminal  30 . In other respects (configurations), the coil component  100  according to the present embodiment is configured in the same way as the coil component  100  according to the third embodiment explained above. 
     In the third embodiment explained above, the folding piece  61  is continuously connected to the outer extension part  38  that laterally extends from the axial direction extension part  37 . On the other hand, in the present embodiment, as shown in, for example,  FIG. 16 , the folding piece  61  is continuously connected to the axial direction extension part  37  and the notch opposite surface arrangement section  35 . That is, the folding piece  61  is directly continuously connected to the axial direction extension part  37  without connecting to the outer extension part  38 , and at the same time, the folding piece  61  is also continuously connected to the notch opposite surface arrangement section  35 . More specifically, the folding piece  61  is continuously connected to the edges of the axial direction extension part  37  and the notch opposite surface arrangement section  35  in a direction orthogonal to the axial direction. 
     Further, in the third embodiment explained above, the end of the external side in the axial direction of the second crimp piece  62  and the end of the external side in the axial direction of the axial direction extension part  37  are flush with each other. On the other hand, in the present embodiment, the second crimp piece  62  projects toward the external side in the axial direction than the axial direction extension part  37 . 
     Further, in the third embodiment explained above, the second crimp piece  62  is completely provided at the external side in the axial direction than the horizontal direction extension part  14   b . On the other hand, in the present embodiment, the second crimp piece  62  is not completely provided at the external side in the axial direction than the horizontal direction extension part  14   b . However, even in the present embodiment, the axial direction extension part  37  and the second crimp piece  62  project toward the external side in the axial direction than the recessed part  14 . 
     Even in the present embodiment, the wire end is fixed by the welding at the position that is located at the external side in the axial direction and at the tip side of the axial direction extension part  37  of the metal terminal  30 . 
     Even in the present embodiment, the wire end is welded to the end of the external side in the axial direction of at least one of the second crimp piece  62  and the axial direction extension part  37 . 
     More specifically, in the present embodiment, for instance, the wire end is welded to the portion of the second crimp piece  62  that projects toward the external side in the axial direction than the axial direction extension part  37  (refer to  FIGS. 17 and 18 ). 
     Even in the present embodiment, the procedure to manufacture the coil component  100  is in the same way as the third embodiment explained above. 
     Fifth Embodiment 
     Next, a Fifth embodiment of the present invention will be explained below with reference to  FIGS. 19-23 . 
       FIG. 19  is a perspective view that shows a coil component  100  viewed from a bottom surface according to a fifth embodiment of the present invention.  FIG. 20  is a side view that shows the coil component  100  according to the fifth embodiment of the present invention.  FIGS. 19 and 20  respectively show a state in which a wire end is arranged at a metal terminal  30 .  FIG. 21  is a partial enlarged perspective view that shows the coil component  100  viewed from the bottom surface according to the fifth embodiment of the present invention.  FIG. 21  shows a state in which the wire end is crimped and fixed.  FIG. 22  is a partial enlarged perspective view that shows the coil component  100  viewed from the bottom surface according to the fifth embodiment of the present invention.  FIG. 23  is a front view that shows the coil component  100  according to the fifth embodiment of the present invention.  FIGS. 22 and 23  show a state in which the welding is already performed. 
     The coil component  100  according to the present embodiment is different from the coil component  100  according to the first embodiment explained above with respect to the configuration of the metal terminal  30 . In other respects (configurations), the coil component  100  according to the present embodiment is configured in the same way as the coil component  100  according to the first embodiment explained above. 
     In the present embodiment, the metal terminal  30  does not have the horizontal direction extension part  32   b  and the weld part  33  that are respectively shown in  FIG. 2 . That is, the flat base part  32  is configured by the vertical direction extension part  32   a  that is explained in the first embodiment. Further, in the present embodiment, the metal terminal  30  does not have the entwining part  36  shown in  FIG. 2 . 
     Instead, in the present embodiment, the metal terminal  30  has a first axial direction extension part  71 , a second axial direction extension part  72 , a positioning raised part (positioning raised tab)  74 , a lateral projection  75 , a crimp piece  76 , and a connection part  77  that are respectively explained below. 
     In the present embodiment, the bottom plate  31  does not reach the end of the opposite surface  12   a  at the inner side in the axial direction. Similarly, the raised part  34  does not reach the end of the raised surface  13   b  at the inner side in the axial direction. Further, similarly, the notch opposite surface arrangement section  35  does not reach the end of the notch opposite surfaces  13   a  at the inner side in the axial direction. 
     In other words, the ends of the bottom plates  31 , the raised part  34 , and the notch opposite surface arrangement section  35  of the metal terminal  30  at the inner side in the axial direction are located at positions toward the external side in the axial direction than the inner surface  12   c  of the flange part  12 . 
     As shown in such as  FIG. 19 , the first axial direction extension part  71  extends from the notch opposite surface arrangement section  35  to the external side in the axial direction. More specifically, for instance, the first axial direction extension part  71  has a part that is provided along the notch opposite surfaces  13   a  and a part that projects from such part toward the external side in the axial direction (i.e., the part that projects from the flange part  12  toward the external side in the axial direction). The first axial direction extension part  71  is provided on the same plane as the notch opposite surface arrangement section  35 . 
     At the tip part in the extending direction of the first axial direction extension part  71 , a notch shape portion  71   a  is formed at an edge of the inner side in a direction crossing the axial direction. As a result, at the tip part in the extending direction of the first axial direction extension part  71 , a narrow-width weld piece  73  is formed. 
     More specifically, the notch shape portion  71   a  includes a tapered part. At the tip part in the extending direction of the first axial direction extension part  71 , a width of the portion that is adjacent to the side of the lateral projection  75  (the inner side in the axial direction) with respect to the narrow-width weld piece  73  becomes gradually narrower toward a tip side (the external side in the axial direction). The narrow-width weld piece  73  is continuously connected to the tip side of the portion that becomes gradually narrower toward the tip side in the first axial direction extension part  71 . 
     At the tip part in the extending direction of the first axial direction extension part  71 , the crimp piece  76  is continuously connected to the edge of the external side with respect to the direction crossing the axial direction via the connection part  77 . More specifically, at the tip part in the extending direction of the first axial direction extension part  71 , the crimp piece  76  is continuously connected to the portion that is located at the inner side in the axial direction than the narrow-width weld piece  73  via the connection part  77 . In other words, the narrow-width weld piece  73  projects toward the external side in the axial direction than the connection part  77 . 
     The wire end is crimped and fixed, and welded to the crimp piece  76 . After the wire end is crimped and fixed by the crimp piece  76 , the wire end is welded to the crimp piece  76 . 
     As shown  FIG. 20 , the crimp piece  76  is provided at the external side in the axial direction than the portion (the horizontal direction extension part  14   b ) that is adjacent to the notch opposite surfaces  13   a  on the surface (the outer surface  12   b ) of the flange part  12  at the external side in the axial direction. 
     Therefore, it is easily performed that the wire end is crimped and fixed by bending the crimp piece  76  without the interference with the flange part  12 . 
     More specifically, the crimp piece  76  is, for instance, provided at the external side in the axial direction than the flat base part  32 . 
     As shown in  FIGS. 19 and 20 , in a state in which the crimp fixation of the wire end by utilizing the crimp piece  76  is not performed, the crimp piece  76  is in a state in which the crimp piece  76  downwardly rises from the first axial direction extension part  71  via the connection part  77 . In this state, the crimp piece  76  is, for instance, bent substantially perpendicularly to the first axial direction extension part  71  with respect to the connection part  77 . Further, in this state, an angle formed between the crimp piece  76  and the first axial direction extension part  71  can be greater than 90 degrees. It is more preferable that the angle is 100 degrees or greater. 
     When the crimp piece  76  is crimped as shown in  FIG. 21 , the crimp piece  76  overlaps with the tip part of the first axial direction extension part  71  in the vertical direction with respect to the shape. 
     At an opposite edge with respect to a side of the first axial direction extension part  71  (the side of the connection part  77 ) of the crimp piece  76 , a notch shape portion  76   a  is formed. As a result, at the end of the external side in the axial direction of the crimp piece  76 , a narrow-width weld piece  76   b  is formed. 
     More specifically, the notch shape portion  76   a  includes a tapered part. A width of a part at the external side in the axial direction of the crimp piece  76  becomes gradually narrower toward the external side in the axial direction. The (narrow-width) weld piece  76   b  is continuously connected to the portion that becomes gradually narrower toward the external side in the axial direction of the crimp piece  76 . 
     As shown in  FIG. 21 , in a state in which the crimp fixation of the wire end by utilizing the crimp piece  76  is already performed, the crimp piece  76  is in a folded-back shape that is obtained by being folded back from the first axial direction extension part  71  (via the connection part  77 ). That is, the crimp piece  76  and the first axial direction extension part  71  are opposed to each other while the crimp piece  76  and the first axial direction extension part  71  sandwich the wire therebetween. As a result, the wire end is crimped and fixed by being held by the crimp piece  76  and the first axial direction extension part  71 . 
     As explained above, the crimp piece  76  is in the folded-back shape that is obtained by being folded back from the outer edge of the first axial direction extension part  71  to the inner edge in the direction orthogonal to the axial direction so that the wire end is crimped and fixed. 
     The left crimp piece  76  is folded back from the left edge at the tip part (the end at the external side in the axial direction) of the first axial direction extension part  71 . The right crimp piece  76  is folded back from the right edge at the tip part (the end at the external side in the axial direction) of the first axial direction extension part  71 . 
     As shown in  FIGS. 22 and 23 , in a state in which the welding is performed, a part of the crimp piece  76  (for instance, the narrow-width weld piece  76   b ) and a part of the first axial direction extension part (for instance, the narrow-width weld piece  73 ) are melted and integrated with the wire end. As a result, the weld ball  50  is formed. 
     Further, the inner side parts of the crimp piece  76  and the first axial direction extension part  71  in the axial direction that are located at the inner side than the narrow-width weld piece  76   b  and the narrow-width weld piece  73  can also form the weld ball  50  by being melted. 
     Similarly, the part of the connection part  77  can also form the weld ball  50  by being melted. 
     Further, the present invention is not limited to the above features. Only the part of the crimp piece  76  can be integrated with the wire end by the welding, or only the part of the first axial direction extension part  71  can also be integrated with the wire end by the welding. 
     Further, as shown in  FIG. 23 , for instance, a half or more of the weld ball  50  is placed inside of a space defined by the notch shape part  13 . 
     The connection part  77  is located at the base end of the crimp piece  76  and mutually connects between the crimp piece  76  and the first axial direction extension part  71 . The connection part  77  is, for instance, formed in a longitudinal configuration in the axial direction (extending in the axial direction). 
     The second axial direction extension part  72  extends from the notch opposite surface arrangement section  35  to the inner side in the axial direction, and the second axial direction extension part  72  is provided along the notch opposite surfaces  13   a.    
     The positioning raised part  74  rises from the end part of the second axial direction extension part  72  at the inner side in the axial direction toward the mounting target surface. However, the present invention is not limited to the above features. The positioning raised part  74  may rise from the notch opposite surface arrangement section  35  toward the mounting target surface. The plate surfaces of the positioning raised part  74  face, for instance, toward the inner side and the external side in the axial direction, respectively. 
     More specifically, the positioning raised part  74  is provided at the edge at the inner side in the axial direction in the space defined by the notch shape part  13 . 
     As shown in  FIG. 20 , a tip  74   a  of the positioning raised part  74  in the rising direction is located above the opposite surface  12   a.    
     The positioning raised part  74  positions the wire end in the direction crossing the axial direction. That is, the left end of the left positioning raised part  74  regulates the movement of the wire end toward the right, and the right end of the right positioning raised part  74  regulates the movement of the wire end toward the left. 
     The lateral projection  75  laterally projects from the notch opposite surface arrangement section  35  and the first axial direction extension part  71 . However, the present invention is not limited to the above features. The lateral projection  75  can laterally project only from the notch opposite surface arrangement section  35 . Alternatively, the lateral projection  75  can also laterally project only from the first axial direction extension part  71 . 
     The left lateral projection  75  projects from the left edges of the notch opposite surface arrangement section  35  and the first axial direction extension part  71  toward the left side. The right lateral projection  75  projects from the right edges of the notch opposite surface arrangement section  35  and the first axial direction extension part  71  toward the right side. 
     The lateral projection  75  is, for instance, formed in a longitudinal configuration in the axial direction (extending in the axial direction). Further, for instance, the connection part  77  is provided at the position on the extension line of the lateral projection  75 . 
     Because the crimp piece  76  and the connection part  77  are spaced apart from the lateral projection  75 , the crimp piece  76  does not interfere with the lateral projection  75  when the crimp piece  76  is crimped. 
     The lateral projection  75  regulates the movement of the wire end toward the notch opposite surfaces  13   a  between the positioning raised part  74  and the crimp piece  76 . 
     As explained above, in the present embodiment, the notch shape part  13  has the raised surface  13   b  and the notch opposite surface  13   a . Specifically, the raised surface  13   b  is parallel to the axial direction and is orthogonal to the opposite surface  12   a . The notch opposite surface  13   a  is provided opposite to the mounting target surface. The metal terminal  30  has the bottom plate  31 , the raised part  34 , the notch opposite surface arrangement section  35 , and the axial direction extension part (the first axial direction extension part  71 ). Specifically, the bottom plate  31  is provided along the opposite surface  12   a  of the flange part  12 . The raised part  34  rises from the bottom plate  31  along the raised surface  13   b  of the notch shape part  13 . The notch opposite surface arrangement section  35  extends from the raised part  34  along the notch opposite surface  13   a  of the notch shape part  13 . The axial direction extension part (the first axial direction extension part  71 ) extends from the notch opposite surface arrangement section  35  in the axial direction. The wire end is fixed by the welding at the position that is located at the external side in the axial direction and at the tip side of the axial direction extension part of the metal terminal  30 . 
     Further, the metal terminal  30  has the positioning raised part  74  and the crimp piece  76 . The positioning raised part  74  rises from the notch opposite surface arrangement section  35  or the axial direction extension part (the first axial direction extension part  71 ) toward the mounting target surface side, and positions the wire end in the direction crossing the axial direction. The crimp piece  76  is in the folded-back shape that is obtained by being folded back from the axial direction extension part and crimps the wire end. The crimp piece  76  is provided at the external side in the axial direction than the positioning raised part  74 . Further, the wire end is welded to the end at the external side in the axial direction of at least one of the crimp piece  76  and the axial direction extension part. Because the wire end can be crimped and fixed by the crimp piece  76  after the wire end is positioned by the positioning raised part  74 , the wire end can be crimped and fixed after the wire end is placed at a desired route. 
     Further, the positioning raised part  74  rises from the end at the inner side in the axial direction of the part (the part including the first axial direction extension part  71 , the notch opposite surface arrangement section  35 , and the second axial direction extension part  72 ) that is provided along the notch opposite surfaces  13   a  of the metal terminal  30 . Therefore, because the part right being pulled out from the shaft part  11  at each of the wire ends can be positioned by the positioning raised part  74 , each of the wire ends can become easy to be positioned at a desired position. 
     Further, the metal terminal  30  has the lateral projection  75  that laterally projects from at least one of the axial direction extension part (the first axial direction extension part  71 ) and the notch opposite surface arrangement section  35 . The lateral projection  75  regulates the movement of the wire end to the side of the notch opposite surfaces  13   a  in the area between the positioning raised part  74  and the crimp piece  76 . 
     Further, as shown in  FIGS. 22 and 23 , even in the present embodiment, the coil component  100  has the plate core  20 . 
     Next, an example of the procedure to manufacture the coil component  100  according to the present embodiment will be explained below. 
     First, as shown in  FIGS. 19 and 20 , the first wire  41  and the second wire  42  are wound around the shaft part  11 . The one end  41   a  and the other end  41   b  of the first wire  41  and the one end  42   a  and the other end  42   b  of the second wire  42  are arranged at the corresponding metal terminal  30 . 
     More specifically, each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a , and the other end  42   b ) is bent along the positioning raised part  74  of the corresponding metal terminal  30 , and furthermore, is arranged along the lateral projection  75 . Further, such each of the wire ends is arranged along the connection part  77  or the first axial direction extension part  71  and is pulled outside. 
     Further, the part of the tip side of each of the wire ends beyond the portion that is provided along the first axial direction extension part  71  or the connection part  77  is held by an external jig (not shown). 
     Next, as shown in  FIG. 21 , each of the crimp pieces  76  is bent toward the first axial direction extension part  71  (via the connection part  77 ) so that each of the wire ends is crimped and fixed by being held by the crimp piece  76  and the first axial direction extension part  71 . 
     Next, for instance, by irradiating a laser beam to the narrow-width weld piece  76   b  of the crimp piece  76  of each of the metal terminals  30 , parts of each of the crimp pieces  76  including the narrow-width weld piece  76   b  and the narrow-width weld piece  73 , and the first axial direction extension part  71 , and a part of the connection part  77  are melted so as to be integrated with each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a , and the other end  42   b ). As a result, the weld ball  50  is formed (shown in  FIG. 22 ). The irradiation direction of the laser beam is, for instance, the upward direction from below. As explained above, each of the wire ends is welded to and is electrically connected to the corresponding metal terminal  30 . 
     Thereafter, in the same way as the first embodiment, the plate core  20  is fixed to the drum core  10 . As a result, the coil component  100  that has the drum core  10  and the plate core  20  can be obtained. 
     Sixth Embodiment 
     Next, a sixth embodiment of the present invention will be explained below with reference to  FIG. 24 . 
       FIG. 24  is a partial enlarged perspective view that shows a coil component  100  viewed from a bottom surface according to a sixth embodiment of the present invention.  FIG. 24  shows a state in which the welding is already performed. 
     The coil component  100  according to the present embodiment is different from the coil component  100  according to the fifth embodiment explained above with respect to the arrangement position of the positioning raised part  74  of the metal terminal  30 . In other respects (configurations), the coil component  100  according to the present embodiment is configured in the same way as the coil component  100  according to the fifth embodiment explained above. 
     In the present embodiment, for instance, the positioning raised part  74  rises from the notch opposite surface arrangement section  35  at the position that is opposed to the raised part  34 . The positioning raised part  74  is bent with respect to the notch opposite surface arrangement section  35 . The plate surfaces of the positioning raised part  74  faces toward right and left (crosswise) directions. Further, the lateral projection  75  laterally projects from the first axial direction extension part  71 . 
     Furthermore, the positioning raised part  74  extends parallel to the axial direction. Therefore, because the longer range of each of the wire ends can be positioned by the positioning raised part  74 , each of the wire ends can be stably arranged at the desired position. 
     Seventh Embodiment 
     Next, a seventh embodiment of the present invention will be explained below with reference to  FIGS. 25-27 . 
       FIG. 25  is a perspective view that shows a coil component  100  viewed from a bottom surface according to a seventh embodiment of the present invention.  FIG. 26  is a side view that shows the coil component  100  according to the seventh embodiment of the present invention.  FIGS. 25 and 26  respectively show a state in which a wire end is crimped and fixed.  FIG. 27  is a partial enlarged perspective view that shows the coil component  100  viewed from the bottom surface according to the seventh embodiment of the present invention.  FIG. 27  shows a state in which the welding is already performed. 
     The coil component  100  according to the present embodiment is different from the coil component  100  according to the fifth embodiment explained above with respect to the configuration of the metal terminal  30 . In other respects (configurations), the coil component  100  according to the present embodiment is configured in the same way as the coil component  100  according to the fifth embodiment explained above. 
     In the present embodiment, the metal terminal  30  does not have the positioning raised part  74  and the lateral projection  75 . 
     Further, the notch shape portion  71   a  and the notch shape portion  76   a  are not formed in the first axial direction extension part  71  and the crimp piece  76 . As a result, the narrow-width weld piece  73  and the narrow-width weld piece  76   b  are not formed at the first axial direction extension part  71  and the crimp piece  76 . 
     In the present embodiment, the crimp piece  76  corresponds to a second crimp piece ( 76 ). 
     In the present embodiment, the recessed part  14  does not have the horizontal direction extension part  14   b  so that the recessed part  14  is, for instance, configured by only the vertical direction extension part  14   a.    
     As shown in  FIGS. 25-27 , the crimp piece  76  projects toward the external side in the axial direction than the flange part  12 . More specifically, the crimp piece  76  is provided at the external side in the axial direction than the vertical direction extension part  14   a.    
     In the present embodiment, an opposing piece  79  is formed at the end of the external side in the axial direction of the first axial direction extension part  71 . The opposing piece  79  is formed wider in a direction orthogonal to the axial direction as compared with the other parts of the first axial direction extension part  71 . The opposing piece  79  is opposed to the crimp piece  76  when the crimp piece  76  is crimped. 
     Further, in the present embodiment, the metal terminal  30  has a crimp piece  78  (a first crimp piece). 
     The crimp piece  78  is continuously connected to the end at the inner side in the axial direction of the second axial direction extension part  72 . More specifically, the crimp piece  78  is continuously connected to the inner side of the second axial direction extension part  72  in the direction orthogonal to the axial direction. 
     Therefore, a folding back direction (a direction from the outside to the inside) of the crimp piece  76  to (the opposing piece  79  of) the first axial direction extension part  71  and a folding back direction (a direction from the inside to the outside) of the crimp piece  78  to the second axial direction extension part  72  are opposite directions to each other. 
     Though an illustration is omitted from the drawings, in a state in which the crimp fixation of the wire end by utilizing the crimp piece  78  and the crimp piece  76  is not performed yet, the crimp piece  78  is in a state in which the crimp piece  78  downwardly rises from the second axial direction extension part  72 . The crimp piece  76  is in a state in which the crimp piece  76  downwardly rises from the first axial direction extension part  71  (via the connection part  77 ). In these states, for instance, the crimp piece  78  is bent substantially perpendicularly to the second axial direction extension part  72  and the crimp piece  76  is bent substantially perpendicularly to the first axial direction extension part  71 . 
     As shown in  FIGS. 25 and 26 , in a state in which the crimp fixation of the wire end by utilizing the crimp piece  78  and the crimp piece  76  is already performed, the crimp piece  78  is in the folded-back shape that is obtained by being folded back from the second axial direction extension part  72  and the crimp piece  76  is in the folded-back shape that is obtained by being folded back from (the opposing piece  79  of) the first axial direction extension part  71  (via the connection part  77 ). That is, the crimp piece  78  and the second axial direction extension part  72  are opposed to each other so as to sandwich the wire end therebetween. Thus, the wire end is crimped and fixed by being held by the crimp piece  78  and the second axial direction extension part  72 . At the same time, the crimp piece  76  and the opposing piece  79  of the first axial direction extension part  71  are opposed to each other so as to sandwich the wire end therebetween. Thus, the wire end is crimped and fixed by being held by the crimp piece  76  and the opposing piece  79  of the first axial direction extension part  71 . 
     As shown in  FIG. 27 , in a state in which the welding is already performed, for instance, a part of the crimp piece  76  is melted and integrated with the wire end. As a result, the weld ball  50  is formed. 
     However, the present invention is not limited to the above features. The parts of each of the crimp pieces  76  and the first axial direction extension part (for instance, the opposing piece  79  of the first axial direction extension part  71 ) can be melted and integrated with the wire end. Further, only a part of the first axial direction extension part  71  among the crimp piece  76  and the first axial direction extension part  71  can also be melted and integrated with the wire end. 
     Further, in the present embodiment, for instance, the bottom plate  31  extends closer to the inner side in the axial direction as compared with the raised part  34 . 
     As explained above, the notch shape part  13  has the raised surface  13   b  and the notch opposite surface  13   a . Specifically, the raised surface  13   b  is parallel to the axial direction and is orthogonal to the opposite surface  12   a . The notch opposite surface  13   a  is provided opposite to the mounting target surface. The metal terminal  30  has the bottom plate  31 , the raised part  34 , the notch opposite surface arrangement section  35 , and the axial direction extension part (the first axial direction extension part  71  and the second axial direction extension part  72 ). Specifically, the bottom plate  31  is provided along the opposite surface  12   a  of the flange part  12 . The raised part  34  rises from the bottom plate  31  along the raised surface  13   b  of the notch shape part  13 . The notch opposite surface arrangement section  35  extends from the raised part  34  along the notch opposite surfaces  13   a  of the notch shape part  13 . The axial direction extension part (the first axial direction extension part  71  and the second axial direction extension part  72 ) extends from the notch opposite surface arrangement section  35  in the axial direction. The wire end is fixed by the welding at the position that is located at the external side in the axial direction and at the tip side of the axial direction extension part of the metal terminal  30 . 
     Further, the metal terminal  30  has the first crimp piece (the crimp piece  78 ) and the second crimp piece (the crimp piece  76 ). Specifically, the first crimp piece (the crimp piece  78 ) is in the folded-back shape that is obtained by being folded back from the axial direction extension part (here, the second axial direction extension part  72 ) and crimps and fixes the wire end. The second crimp piece (the crimp piece  76 ) is in the folded-back shape that is obtained by being folded back from the axial direction extension part (here, the first axial direction extension part  71 ) and crimps and fixes the wire end. The second crimp piece is provided at the external side in the axial direction than the first crimp piece. The wire end is welded to the end of the external side in the axial direction of at least one of the second crimp piece and the axial direction extension part. Therefore, each of the wire ends can be respectively and more stably fixed by two of the crimp pieces. 
     Further, because the wire end is respectively crimped and fixed by the first crimp piece and the second crimp piece, the tension of the wire end between the first crimp piece and the second crimp piece can be reduced. In other words, the tension of the wire end can be dispersed to the first crimp piece and the second crimp piece. As a result, the damage and the disconnection (breaking) of the wire end such as at the time of the welding can be suppressed. 
     Further, even in the present invention, the recessed part  14  can have the horizontal direction extension part  14   b , and in that case, it is preferred that the crimp piece  76  is provided at the external side in the axial direction than the horizontal direction extension part  14   b . That is, even in the present invention, it is preferred that the second crimp piece (the crimp piece  76 ) is provided at the external side in the axial direction than the portion (the horizontal direction extension part  14   b ) that is adjacent to the notch opposite surfaces  13   a  on the surface (the outer surface  12   b ) of the flange part  12  at the external side in the axial direction. As a result, it can make the flange part  12  hardly become an obstacle when the second crimp piece is crimped. 
     Further, the folding back direction of the first crimp piece (the crimp piece  78 ) and the folding back direction of the second crimp piece (the crimp piece  76 ) are opposite directions to each other. Therefore, the wire end can be more stably crimped and fixed by the first crimp piece and the second crimp piece. 
     Next, an example of the procedure to manufacture the coil component  100  according to the present embodiment will be explained below. 
     First, the first wire  41  and the second wire  42  are wound around the shaft part  11 . Thus, the one end  41   a  and the other end  41   b  of the first wire  41  and the one end  42   a  and the other end  42   b  of the second wire  42  are arranges along the second axial direction extension part  72 , the notch opposite surface arrangement section  35 , and the first axial direction extension part  71  of the corresponding metal terminal  30 . 
     Further, the part of the tip side beyond the portion that is provided along the first axial direction extension part  71  of each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a , and the other end  42   b ) is held by an external jig (not shown). 
     Next, as shown in  FIGS. 25 and 26 , the crimp piece  78  and the crimp piece  76  of each of the metal terminals  30  are bent toward the second axial direction extension part  72  and the first axial direction extension part  71 , respectively so that each of the wire ends is crimped and fixed by the crimp piece  78  and the crimp piece  76 . 
     Next, for instance, by irradiating a laser beam to the crimp piece  76  of each of the metal terminals  30 , the part of the crimp piece  76  and each of the wire ends (the one end  41   a , the other end  41   b , the one end  42   a , and the other end  42   b ) are welded. As a result, the weld ball  50  (shown in  FIG. 27 ) is formed. The irradiation direction of the laser beam is, for instance, the upward direction from below. As explained above, each of the wire ends is welded to and is electrically connected to the corresponding metal terminal  30 . 
     Thereafter, in the same way as the first embodiment, the plate core  20  is fixed to the drum core  10 . As a result, the coil component  100  that has the drum core  10  and the plate core  20  can be obtained. 
     Eighth Embodiment 
     Next, an eighth embodiment of the present invention will be explained below with reference to  FIGS. 28-30 . 
       FIG. 28  is a perspective view that shows a coil component  100  viewed from a bottom surface according to an eighth embodiment of the present invention.  FIG. 28  shows a state in which a wire end is entwined to the metal terminal  30 .  FIG. 29  is a perspective view that shows the coil component  100  according to the eighth embodiment of the present invention.  FIG. 30  is a side view that shows the coil component  100  according to the eighth embodiment of the present invention.  FIGS. 29 and 30  show a state in which the welding is already performed. 
     The coil component  100  according to the present embodiment is different from the coil component  100  according to the first embodiment explained above with respect to the configuration of the metal terminal  30 . In other respects (configurations), the coil component  100  according to the present embodiment is configured in the same way as the coil component  100  according to the first embodiment explained above. 
     In the present embodiment, the metal terminal  30  does not have the raised part  34 , the notch opposite surface arrangement section  35 , the entwining part  36 , and the cut part  31   a  that are respectively shown in  FIG. 2 . 
     As shown in  FIG. 28 , the metal terminal  30  has a raised part  81  and a projection piece  82 . Specifically, the raised part  81  rises from the horizontal direction extension part  32   b  toward the mounting target surface. The projection piece  82  obliquely projects from the raised part  81  toward the external side in the axial direction. In the present embodiment, the flat base part  32  is configured by including the raised part  81 . 
     Further, though the raised part  81  is, for instance, provided on the same plane as the flat base part  32  (the vertical direction extension part  32   a  and the horizontal direction extension part  32   b ), the raised part  81  obliquely rises toward a direction crossing the axial direction so as to laterally project from the flange part  12 . That is, the left raised part  81  projects from the left end surface of the flange part  12  toward the left side and the right raised part  81  projects from the right end surface of the flange part  12  toward the right side. 
     Each of the wire ends is pulled outside in the axial direction through the space defined by the notch shape part  13  so as to be connected to each of the metal terminals  30 . 
     For instance, a constricted part  82   a  is formed in one side of the projection piece  82 . Each of the wire ends is entwined to the constricted part  82   a . Further, for instance, the part of the tip side beyond the constricted part  82   a  of the projection piece  82  is melted and integrated with the wire end by the welding. As a result, a weld ball  50  (shown in  FIGS. 29 and 30 ) is formed. 
     As explained above, the coil component  100  according to the embodiment of the present invention includes the core (the drum core  10 ), the first and second wires  41  and  42 , and the plurality of metal terminals  30 . Specifically, the core (the drum core  10 ) has the shaft part  11  (shown in  FIG. 30 ) and the flange parts  12  that are formed at both ends of the shaft part  11 . The first and second wires  41  and  42  are wound around the shaft part  11 . The corresponding wire end (any of one end  41   a , the other end  41   b , one end  42   a , and the other end  42   b ) of both ends (one end  41   a  and the other end  41   b ) of the first wire  41  and both ends (one end  42   a  and the other end  42   b ) of the second wire  42  is connected to the corresponding one of the plurality of metal terminals  30 . In regards to the opposite surface  12   a  of each of the flange parts  12  that is provided opposite to the mounting target surface, the notch shape part  13  is respectively formed at the both ends in the direction orthogonal to the axial direction of the shaft part  11 . The wire end is pulled outside in the axial direction via the notch shape part  13  and is connected to the metal terminal  30 . 
     As a result, the connection of the wire end to the metal terminal  30  can be performed at the outside of the notch shape part  13  while avoiding the interference with the flange part  12 . Therefore, the process in which the wire end is connected to the metal terminal  30  can be easily performed. That is, the good manufacturing easiness of the coil component  100  can be secured. 
     Further, the metal terminal  30  has the flat base part  32  and the projection piece  82 . Specifically, the flat base part  32  is provided along the surface of the flange part  12  at the external side in the axial direction and is orthogonal to the axial direction. The projection piece  82  obliquely projects from the flat base part  32  toward the external side in the axial direction. The wire end is welded to the projection piece  82 . Therefore, when the wire end is connected to the metal terminal  30  by the welding, it preferably makes the flange part  12  hardly become the obstacle. As a result, it is further easy to manufacture the coil component  100 . 
     The embodiments according to the present invention explained above also include the technical concepts or idea described below. 
     (1) A coil component including: a core that is configured with a shaft and first and second flanges, the first and second flanges being formed at first and second opposite ends of the shaft; first and second wires that are wound around the shaft; and a plurality of metal terminals to which both wire ends of each of the first and second wires are connected, respectively. A notch is formed in both ends in a first direction of an opposite surface of each of the first and second flanges. The opposite surface faces a mounting surface on which the coil component is mounted. The first direction is perpendicular to an axial direction of the shaft. At least part of each of the plurality of metal terminals is disposed in the notch. 
     (2) In the coil component according to the above aspect (1), the notch has a raised surface and an opposing surface. The raised surface is perpendicular to the opposite surface of each of the first and second flanges and extends parallel to the axial direction. The opposing surface of the notch faces the mounting surface. Each of the plurality of metal terminals is configured with: a bottom plate that is disposed along the opposite surface of corresponding one of the first and second flanges; a raised segment that rises along the raised surface of the notch from the bottom plate; an arrangement plate that extends along the opposite surface of the notch from the raised segment; and an axial direction extension plate that extends in the axial direction from the arrangement plate. One of the corresponding wire ends is welded to a tip of the axial direction extension plate, and the tip is located at an axially external side of each of the plurality of metal terminals. 
     (3) In the coil component according to the above aspect (2), each of the plurality of metal terminals is configured with: a first crimp piece that is folded back from at least one of the axial direction extension plate or the arrangement plate so as to crimp a first end of the wire ends; and a second crimp piece that is folded back from the axial direction extension plate so as to crimp the first end of the wire ends. The second crimp piece is located closer to the axially external side than the first crimp piece. The first end is welded to the tip of at least one of the second crimp piece or the axial direction extension plate. 
     (4) In the coil component according to the above aspect (3), an end surface at the tip of the axial direction extension plate in the axial direction is located on the same plane as an end surface at the tip of the second crimp piece in the axial direction or is located further at the axially external side than the end surface at the tip of the second crimp piece. 
     (5) In the coil component according to the above aspect (3) or aspect (4), the second crimp piece is located further at the axially external side than a horizontal direction extension part formed in an external end surface of one of the first and second flanges in the axial direction. 
     (6) In the coil component according to one of the above aspects (3) to (5), the first and second crimp pieces configure a monolithic piece that is folded back from at least one of the axial direction extension plate or the arrangement plate. 
     (7) In the coil component according to one of the above aspects (3) to (5), a fold-back direction of the first crimp piece is opposite to a fold-back direction of the second crimp piece. 
     (8) In the coil component according to the above aspect (2), each of the plurality of metal terminals is configured with: a positioning raised tab that rises toward the mounting surface from one of the arrangement plate and the axial direction extension plate so as to position a first end of the wire ends in the first direction; and a crimp piece that is folded back from the axial direction extension plate so as to crimp the first end of the wire ends. The crimp piece is located closer to the axially external side than the positioning raised tab. The first end is welded to the tip of at least one of the crimp piece or the axial direction extension plate. 
     (9) In the coil component according to the above aspect (8), each of the plurality of metal terminals is configured with a lateral projection that laterally projects from at least one of the axial direction extension plate or the arrangement plate. The lateral projection is configured to regulate movement of the first end of the wire ends toward the mounting surface between the positioning raised tab and the crimp piece. 
     (10) In the coil component according to the above aspect (8) or aspect (9), the positioning raised tab rises from an axially internal side of each of the plurality of metal terminals located along the opposing surface of the notch. 
     (11) In the coil component according to one of the above aspects (8) to (10), the positioning raised tab extends parallel to the axial direction. 
     (12) In the coil component according to the above aspect (1), each of the plurality of metal terminals is configured with: an entwining tab to which a first end of the wire ends is entwined; and a weld tab to which the first end is welded. The entwining tab is provided at the notch. 
     (13) In the coil component according to the above aspect (12), an external surface in the axial direction of each of the first and second flanges has a recess or a groove. Each of the plurality of metal terminals has an external plate in the recess, and the external plate extends in a direction perpendicular to the axial direction. The weld tab continuously rises from the external plate toward a side of the mounting surface and is located adjacent to an external side in the axial direction of the notch. 
     (14) In the coil component according to the above aspect (1), the notch has a raised surface and an opposing surface. The raised surface is perpendicular to the opposite surface of each of the first and second flanges and extends parallel to the axial direction. The opposing surface faces the mounting surface. Each of the plurality of metal terminals is configured with: a bottom plate that is disposed along the opposing surface of corresponding one of the first and second flanges; a raised segment that rises along the raised surface of the notch from the bottom plate; an arrangement plate that extends along the opposing surface of the notch from the raised segment; an entwining tab that rises from the arrangement plate, the entwining tab facing the raised segment, a first wire end of the wire ends being entwined to the entwining tab; an axial direction extension plate that extends in the axial direction from the arrangement plate; and a crimp piece that is folded back from the axial direction extension plate so as to crimp the first end of the wire ends. The entwining tab is provided at the notch. The first end is welded to the tip of at least one of the crimp piece or the axial direction extension plate. 
     (15) In the coil component according to the above aspect (14), the crimp piece is located closer to the axially external side than a horizontal direction extension part formed in an external end surface of one of the first and second flanges. 
     (16) A coil component including: a core that is configured with a shaft and first and second flanges, the first and second flanges being formed at first and second opposite ends of the shaft; and a plurality of metal terminals to which both wire ends of each of first and second wires are connected, respectively, the first and second wires being wound around the shaft. A notch is formed in both ends in a first direction of an opposite surface of each of the first and second flanges. The opposite surface faces a mounting surface on which the coil component is mounted, and the first direction is perpendicular to an axial direction of the shaft. At least part of each of the plurality of metal terminals is disposed in the notch. 
     (17) A coil component including: a core that is configured with a shaft and first and second flanges, the first and second flanges being formed at first and second opposite ends of the shaft; first and second wires that are wound around the shaft; and a plurality of metal terminals to which both wire ends of each of the first and second wires are connected, respectively. A notch is formed in both ends in a first direction of an opposite surface of each of the first and second flanges. The opposite surface faces a mounting surface on which the coil component is mounted. The first direction is perpendicular to an axial direction of the shaft. Each of the wire ends is pulled toward an axially external side of corresponding one of the first and second flanges via corresponding one of the notches so as to connect corresponding one of the plurality of metal terminals. 
     (18) In the coil component according to the above aspect (17), each of the plurality of metal terminals is configured with: an external plate that is provided along the axially external side of corresponding one of the first and second flanges and that is orthogonal to the axial direction; and a projection piece that obliquely projects toward the axially external side from the external plate. Each of the wire ends is welded to corresponding one of the projection pieces. 
     The coil component being thus described, it will be apparent that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be apparent to one of ordinary skill in the art are intended to be included within the scope of the following claims.