JP6131666B2 - Coil parts - Google Patents

Description

  The present invention relates to a coil component.

  Among coil components, for example, there is a configuration as shown in Patent Document 1. In Patent Document 1, a metal terminal sandwiches a terminal portion of a wire, and welding using, for example, laser or arc discharge is performed on the sandwiched portion.

JP 2012-089804 A

  By the way, in the structure of patent document 1, the terminal and terminal of a wire are joined by welding, without using solder. Therefore, when reliable joining can be performed, reliability is high. However, in the configuration of Patent Document 1, there is a problem that if the metal terminal and the wire melt too much, the wire is disconnected. That is, when welding is performed using laser or arc discharge, if the output time exceeds a specified time or the output exceeds a specified output, the wire is disconnected.

  The present invention has been made in view of such a problem, and an object of the present invention is to prevent disconnection at the welded part when the metal terminal and the wire entangled part are joined by welding. It is intended to provide a possible coil component.

In order to solve the above problems, one aspect of the coil component of the present invention includes a core made of a magnetic material, a coil formed by winding a wire around the core, and a terminal base portion located on the core side And at least a part of the terminal base is attached to the core, and has a binding portion where the terminal of the coil is entangled, and the base of the terminal is located at one end which is a boundary portion between the linking portion and the terminal base And a part of the binding part and the terminal constitutes an integrated part integrated by welding, and the integrated part is in a facing part facing the binding part of the terminal base part The integrated portion is provided at a position farther to the other end side than the one end side at the opposite portion, and is opposed to the opposite portion, and is entangled. The part is at least twice for the opposite part When the tip of the binding part is connected to the boundary part, the connected line is inclined with respect to the opposite part so that the side where the root is located has an acute angle. The coil is characterized in that it is located on the opposite side of the base with the metal terminal interposed therebetween .

  Further, according to another aspect of the coil component of the present invention, in addition to the above-described invention, the binding portion is provided so as to be inclined with respect to the facing portion so that the side where the root is located has an acute angle. Is preferably located on the opposite side of the base with the metal terminal interposed therebetween.

  Furthermore, in another aspect of the coil component of the present invention, in addition to the above-described invention, it is preferable that the binding portion is provided to be inclined within a range of 35 to 55 degrees with respect to the facing portion. .

  Further, according to another aspect of the coil component of the present invention, in addition to the above-described invention, the terminal base portion is further provided with an extension fixing portion that is fixed to the core. It is preferable that the facing portion is fixed to the side surface, and that the facing portion is continuous with the stretch fixing portion, and the facing portion is located on the top surface portion of the core.

  Further, in another aspect of the coil component of the present invention, in addition to the above-described invention, it is preferable that the binding portion is provided with a narrower width than the stretch fixing portion.

  Furthermore, the other side surface of the coil component of the present invention, in addition to the above-described invention, further, the stretch fixing portion is provided with a side recess recessed toward the center side in the width direction of the stretch fixing portion. Is preferred.

  According to the present invention, in the coil component, when the metal terminal and the wire binding part are joined by welding, it is possible to prevent disconnection at the welding part.

It is a perspective view which shows the structure of the coil component which concerns on one embodiment of this invention. It is a perspective view which shows the state which removed the case from the coil components of FIG. It is a perspective view which shows the shape of the core of the coil components of FIG. It is a perspective view which shows the structure of the metal terminal of the coil components of FIG. It is a perspective view which shows the structure of the case of the coil components of FIG. It is a sectional side view which shows the mode of fixation to the recessed part for terminals in the side surface recessed part vicinity of the extending | stretching fixing part of the coil component of FIG. It is a side view which shows the image of welding with the terminal and the binding part in the coil components of FIG. It is a partial sectional side view which expands and shows the welding site | part of the terminal and binding part in the coil components of FIG. It is a partial sectional side view which expands and shows the welding site | part of the terminal in a conventional coil component, and a binding part, (A) shows a mode immediately after formation of the metal fusion | melting part W2, (B) is metal The melted part W2 is in a state of drooping downward. It is a side view which shows the image of the welding of the terminal which concerns on a modification, and a binding part. It is a side view which shows the image of the welding of the terminal and binding part which concern on the modification different from FIG. It is a perspective view which shows the structure of the coil component which concerns on the modification different from FIG. 10 and FIG.

  Hereinafter, coil part 10 concerning one embodiment of the present invention is explained based on a drawing. In the following description, the case where the coil component 10 is a common mode noise filter will be described.

  In the following description, the side where the binding portion 44 is located when viewed from the mounting terminal portion 41 described later is located on the upper side (Z1 side), and the mounting terminal portion 41 is positioned when viewed from the binding portion 44 opposite thereto. The side is the lower side (Z2 side). The direction in which the coils 30 are arranged is the X direction, and the right side in FIG. 1 is the X1 side, and the opposite left side is the X2 side. Further, the direction orthogonal to the X direction and the Z direction is defined as the Y direction, and the near side in FIG.

<About the structure of the coil component 10>
FIG. 1 is a perspective view showing the overall configuration of the coil component 10. FIG. 2 is a perspective view showing a state where the case 50 is removed from the coil component 10. As shown in FIG. 1, the coil component 10 includes a core 20, a coil 30, a metal terminal 40, and a case 50.

  FIG. 3 is a perspective view showing the shape of the core. As shown in FIG. 3, in this embodiment, the core 20 is provided so that the shape when viewed in plan is a rectangular ring shape. Hereinafter, when it is necessary to distinguish the four sides of the rectangular ring-shaped core 20, they are referred to as core core portions 21a and 21b and connection core portions 22a and 22b, respectively. As shown in FIG. 3, the core core portion 21a and the core core portion 21b are provided to face each other at a predetermined interval, and are connected so as to connect each other from both end sides of the core core portions 21a and 21b. Core portions 22a and 22b are provided. The core 20 is made of a magnetic material. As the magnetic material, for example, various ferrites such as nickel-based ferrite or manganese-based ferrite, permalloy, sendust, and the like can be used.

  As shown in FIG. 3, a winding frame recess 23 that is recessed toward the upper side is provided on the lower side of the core core portions 21 a and 21 b. As shown in FIGS. 1 and 2, the wire 31 is wound around the winding frame recess 23, and the coil 30 is placed in the winding frame recess 23 by the winding of the wire 31. The end face of the winding frame recess 23 serves as a flange that defines the positions of both ends of the coil 30. Moreover, the part which winds the coil 30 containing the winding frame recessed part 23 is equivalent to the winding frame part 24 in which the coil 30 is arrange | positioned.

  Moreover, as shown in FIG. 3, the terminal recessed part 25 is provided in the side surface of connection core part 22a, 22b. The terminal recess 25 is a portion provided so as to be recessed from the outer peripheral side to the inner peripheral side of the connecting core portions 22a and 22b, and is provided so as to penetrate the height direction (Z direction). The terminal recess 25 is provided with an extension fixing portion 42 of the metal terminal 40 described later. And in this recessed part 25 for terminals, the extending | stretching fixing | fixed part 42 is fixed to connection core part 22a, 22b via an adhesive agent. In the present embodiment, two terminal recesses 25 are provided in each of the connecting core portions 22a and 22b (a total of four cores 20). Therefore, in each connection core part 22a, 22b, the part which partitions the recessed part 25 for adjacent terminals becomes the protrusion part 26 which protrudes to an outer peripheral side.

  A claw concave portion 27 is provided on the inner peripheral side of the connecting core portions 22a and 22b. The claw recess 27 is a portion where a locking claw 54 of the case 50 described later is located, and is formed by recessing the inner peripheral side of the connecting core portions 22a and 22b toward the outer peripheral side. At this time, the claw recess 27 is provided so as to penetrate the lower end side from a predetermined position on the upper side.

  Each coil 30 is formed by winding the wire 31 around each winding frame portion 24 by a predetermined number of turns. The terminal 31a of the coil 30 is entangled with a tie portion 44 described later. Then, by performing welding in a state where the terminal 31a is entangled with the binding part 44, an integrated part W1 in which the terminal 31a and the binding part 44 are integrated is formed. In the present embodiment, the coil component 10 is small in size (for example, about 3 mm to 10 mm). Therefore, when the integrated part W1 is formed, immediately after welding, the molten metal part is spherical or nearly spherical due to surface tension. Formed. The wire 31 is an enameled wire or the like in which a conductor portion that conducts electricity is covered with an insulating film.

  Next, the metal terminal 40 will be described. The metal terminal 40 is formed by appropriately pressing or bending a metal plate. FIG. 4 is a perspective view showing the configuration of the metal terminal 40. As shown in FIG. 4, the metal terminal 40 includes a mounting terminal portion 41, an extension fixing portion 42, an upper fixing portion 43, and a binding portion 44. The mounting terminal portion 41 is a portion that contacts the lower surface side of the connecting core portions 22a and 22b. The mounting terminal portion 41 is a portion that is mounted on a mounting board (not shown).

  In the present embodiment, the surface of the metal terminal 40 is plated, but may be not plated. Examples of the plating material include nickel, zinc, and tin, but other materials may be used.

  Further, the extending and fixing part 42 is a part extending in the vertical direction (Z direction), the lower end side is connected to the mounting terminal part 41, and the upper end side is connected to the upper fixing part 43. The extension fixing portion 42 is a portion that is located in the terminal recess 25 of the core 20 and is attached to the terminal recess 25 via an adhesive or the like.

  The extending and fixing part 42 is provided with side recesses 42a and 42b. The side recesses 42a and 42b are portions that are recessed from the side surface of the stretch fixing portion 42 toward the center in the width direction. Due to the presence of the side recesses 42a and 42b, the fixing strength can be improved when the stretch fixing portion 42 is fixed to the terminal recess 25 with an adhesive as will be described later. In FIG. 2 and FIG. 4, the side concave portion 42 a is a long concave portion provided on one side surface of the stretch fixing portion 42. Further, the side recesses 42b are substantially semicircular concave portions provided on the other side surface of the extension fixing portion 42, and two side recesses 42b are provided in the present embodiment. However, the side recesses 42a and 42b can adopt various shapes according to the shape of the hoop material, cutting from the hoop material, and the like.

  The upper fixing portion 43 is a portion located on the upper side of the connecting core portions 22a and 22b. The upper fixing portion 43 has one end side (Y1 side) connected to the extension fixing portion 42 and the other end side (Y2 side) connected to the binding portion 44. The upper fixing portion 43 sandwiches the connecting core portions 22 a and 22 b together with the mounting terminal portion 41. Thereby, the metal terminal 40 can be positioned in the vertical direction (Z direction). In the present embodiment, the upper fixing portion 43 is provided with a narrower width than the stretch fixing portion 42 together with the binding portion 44. In addition, in the X direction, the two upper fixing portions 43 are located on the side away from each other in the width direction (X direction) of the stretch fixing portion 42, thereby providing a space between the upper fixing portions 43. Is secured. This space allows a part of the terminal 31a of the coil 30 to be located.

  The mounting terminal portion 41, the extension fixing portion 42, and the upper fixing portion 43 correspond to the terminal base portion. Further, the upper fixing portion 43 corresponds to the facing portion.

  Further, the binding portion 44 is configured by being bent from the other end portion of the upper fixing portion 43. By this bending, the binding portion 44 extends from the upper fixing portion 43 side toward the upper side and the outer side (in an oblique direction that is oblique to the vertical direction). That is, when the terminal 31a is located at the boundary portion (root) between the binding portion 44 and the upper fixing portion 43, the binding portion 44 and the upper fixing portion 43 are perpendicular to the terminal 31a located at the root. Rather, the binding portion 44 and the upper fixing portion 43 are positioned closer to each other.

  In the present embodiment, the binding portion 44 is bent with an angle of approximately 45 degrees including 45 degrees with respect to the upper fixing portion 43. The bending angle of the binding portion 44 with respect to the upper fixing portion 43 is not limited to approximately 45 degrees, and may be any angle as long as it is within a range of 35 degrees to 55 degrees. Further, it may be bent at an angle other than 35 to 55 degrees.

  The binding portion 44 is a portion where the terminal 31a of the coil 30 is bound. When the terminal 31 a is bound, the terminal 31 a is positioned at the base of the upper fixing portion 43, and is wound around the binding portion 44 along the binding portion 44 by a predetermined number of turns.

  However, after the terminal 31a is entangled with the binding part 44, an integrated portion W1 in which the binding part 44 and the terminal 31a are integrated by welding is formed above the binding part. Therefore, at the welding site, the terminal shape of the binding portion 44 as shown in FIG. 4 does not exist, and the integrated portion W1 as shown in FIG. 2 exists.

  In consideration of forming the integrated portion W1 by welding, the material of the conductor portion of the wire 31 and the material of the metal terminal 40 may be the same material or the same material as the main component. preferable. Examples of the same material include copper, but it is of course possible to use various metal materials other than copper.

  Further, the center of the integrated part W1 is located at a position shifted in the Y direction with respect to the center of the terminal 31a located at the base (see FIG. 8 described later). Such a shifted position is preferably a position where the integrated portion W1 does not completely overlap with the terminal 31a positioned at the base. However, even if the integrated portion W1 is slightly overlapped with the terminal 31a located at the root, the integrated portion W1 is solidified at the overlapping position by cooling, and the terminal 31a located at the root is not melted. Such a slightly overlapping position may be used.

  Subsequently, the case 50 will be described. FIG. 5 is a perspective view showing the configuration of the case 50. In addition, the coil component 10 is good also as a structure which is not provided with the case 50 as shown in FIG. The case 50 covers a portion other than the case 50 in the coil component 10 while covering the core 20, the coil 30, and the like. The case 50 includes a plate-like top surface portion 51, and the top surface portion 51 is located above the case 50. Moreover, from the top surface part 51, the leg part 52 is extended toward the downward side. The leg portions 52 are positioned at the four corners of the rectangular shape when the coil component 10 is viewed in plan (in this case, the coil component 10 has a rectangular shape).

  In the present embodiment, the lower end portion of the leg portion 52 is located above the lower surface of the mounting terminal portion 41. Note that the lower end portion of the leg portion 52 may be positioned above the lower surface of the core 20. Therefore, when connecting the mounting terminal portion 41 to a mounting board (not shown), it is possible to prevent the leg portion 52 from being too long and hindering electrical connection.

  The case 50 is provided with a core receiving portion 53. The core receiving portion 53 is a member that defines a position on the upper side of the core 20. That is, the coil 30 is disposed on the winding frame portion 24 of the core 20, but the dimension in which the core receiving portion 53 extends downward is defined in consideration of the space where the coil 30 is located.

  Here, a total of four core receiving portions 53 are provided in the configuration shown in FIG. 5, one at the Y1 side edge of the case 50 and three at the Y2 side edge of the case 50. ing. Moreover, the core receiving part 53 is located in the center part of a X direction in the edge part by the side of Y1 of case 50. As shown in FIG. On the other hand, at the edge portion on the Y2 side of the case 50, the core receiving portion 53 is located at the center portion in the X direction and is located next to the leg portion 52. However, as long as the position on the upper side of the core 20 can be stably defined, the number and the position of the core receiving portions 53 may be arbitrary.

  The case 50 is provided with a locking claw 54. As shown in FIG. 5, the locking claw 54 is a hook-like portion extending from the lower surface side of the top surface portion 51 and is located in the claw recess 27 described above. Thereby, the case 50 is prevented from being detached from the core 20. In the present embodiment, there are a total of two locking claws 54, one located in the claw recess 27 of the connecting core portion 22a and one located in the claw recess 27 in the connecting core portion 22b. 50 is provided on the center side in the X direction, and the position thereof corresponds to the claw recess 27.

<About the manufacturing method of the coil components 10>
Next, a method for manufacturing the coil component 10 having the above-described configuration will be described below.

  When the coil component 10 is manufactured, a metal terminal 40 as shown in FIG. 4 is formed by pressing or bending the metal plate. In addition to the formation of the metal terminal 40, the core 20 as shown in FIG. 3 is formed by, for example, sintering a magnetic material. Thereafter, the extension fixing portion 42 is positioned in the terminal recess 25 of the core 20, and the extension fixing portion 42 and the terminal recess 25 are bonded and fixed. In this case, it is preferable to apply an adhesive to at least one of the extension fixing portion 42 and the terminal recess 25 and solidify the adhesive to fix them.

  FIG. 6 is a side cross-sectional view showing a state of fixing to the terminal recess 25 in the vicinity of the side recess 42 b of the extension fixing portion 42. As shown in FIG. 6, when the stretch fixing portion 42 is bonded and fixed to the terminal recess 25 using an adhesive, when the stretch fixing portion 42 is pressed against the terminal recess 25, a portion where the adhesive protrudes is generated ( Hereinafter, the protruding portion is referred to as an adhesive solidified portion 61). However, since the extending and fixing part 42 is provided with side recesses 42a and 42b, the adhesive solidifying part 61 is located in the side recesses 42a and 42b (in FIG. 6, only the vicinity of the side recess 42b is illustrated. The same applies to the side recess 42a). Further, the adhesive solidifying portion 61 forms a fillet-like portion between the edge portion of the stretch fixing portion 42. When the fillet-like portion is solidified, the stretch fixing portion 42 is firmly fixed to the terminal recess 25.

  In addition, after fixing the metal terminal 40 to the core 20 described above, the coil 30 is formed by winding the wire 31 around the winding frame portion 24 of the core 20 by a predetermined number of turns. Then, after the coil 30 is formed, the end 31a of the wire 31 is wound around the binding portion 44 by a predetermined number of turns. After this binding, the terminal 31a and the binding portion 44 are welded. In this welding, for example, TIG welding using arc discharge, MIG welding, carbon dioxide gas welding, MAG welding, or laser welding using laser light can be used. In addition, spot welding, gas welding, plasma Various types of welding such as welding can be used.

  FIG. 7 is a side view showing an image of welding between the terminal 31 a and the binding portion 44 in the coil component 10. FIG. 8 is a partial side cross-sectional view showing the welded portion between the terminal 31a and the binding portion 44 in an enlarged manner. As is apparent from FIGS. 7 and 8, when the metal melted part W2 is formed by welding (when the metal melted part W2 is solidified by cooling, the integrated part W1 is formed), the metal melted part W2 is fixed upward. It is located at a position shifted in the Y direction from the root where the terminal 31a is located, in the vicinity of the bent portion of the portion 43 and the binding portion 44. In addition, the metal melting part W2 is located with a predetermined gap S from the upper fixing part 43. Therefore, even when the metal melted portion W2 that has been melted and softened hangs down during welding, the metal melted portion W2 that hangs down does not need to cover the wire 31 completely. Thereby, it is possible to prevent the wire 31 from being disconnected.

  Moreover, since the integrated part W1 has separated the clearance S with respect to the upper fixing part 43, the binding part 44 is in a state having a spring property. Therefore, in the binding portion 44, even if an environmental load such as a thermal shock or a vibration shock occurs, the stress applied to the terminal 31a can be relieved, thereby preventing the terminal 31a from being disconnected.

  Here, a configuration as shown in FIGS. 7 and 8 and a conventional configuration as a comparison target will be described. FIG. 9 is an enlarged partial side sectional view showing a welding portion between the conventional terminal 31a and the binding portion 44. FIG. 9A shows a state immediately after the formation of the metal melted portion W2, and FIG. Shows a state where the metal melted portion W2 has drooped downward. In the configuration shown in FIG. 9, the binding portion 44 extends along the vertical direction (Z direction), and the binding portion 44 extends in an oblique direction as shown in FIGS. 7 and 8. Is different.

  When the metal melted portion W2 hangs downward as shown in FIG. 9B from the state where the metal melted portion W2 is located above as shown in FIG. 9A, the metal melted portion W2 and the terminal 31a In the boundary portion A, disconnection is likely to occur. The main cause of the disconnection is that the metal is melted and softened in the metal melting portion W2, but the disconnection is also likely to occur due to tension applied to the terminal 31a.

  However, in the configuration as shown in FIGS. 7 and 8, the main part of the metal melting part W2 does not exist on the coil 30 side (Y2 side in FIG. 7), and on the opposite side (the binding part 44 and the core). 20 outside; Y1 side in FIG. 7). Therefore, even if the metal melted part W2 hangs downward, only a part thereof reaches the terminal 31a located at the base P of the boundary between the binding part 44 and the upper fixing part 43.

  Further, the terminal 31a located at the root P described above extends in a direction (X direction) orthogonal to the paper surface. Therefore, even if the terminal 31a moves a little near the base P, it does not leave the molten metal portion W2. However, as in the case of the terminal 31a in the vicinity of the boundary portion A in FIG. 9B, when the Y direction in which the tension is applied is set as the main extending direction, the terminal 31a is disconnected when the terminal 31a is moved a little. That is, in the configuration of the present embodiment as shown in FIGS. 7 and 8, even if the metal melted portion W2 is formed, unlike the conventional configuration shown in FIG. 9, it is difficult to disconnect.

  Here, when the metal melted portion W2 is formed, the plating of the upper fixing portion 43 and the extension fixing portion 42 in the metal terminal 40 is destroyed by being oxidized to some extent. In particular, when the metal fusion part W2 comes into contact with the upper fixing part 43, the destruction of the plating progresses due to the transfer of heat from the metal fusion part W2. However, in the present embodiment, as shown in FIGS. 7 and 8, the metal melting portion W <b> 2 is located with a gap S between the upper fixing portion 43. Therefore, heat is not immediately transmitted to the upper fixing portion 43 and the extension fixing portion 42, thereby preventing the plating of the upper fixing portion 43 and the extension fixing portion 42 from being damaged.

  Note that the coil 30 may be formed before the adhesive fixing between the extension fixing portion 42 and the terminal recess 25 as described above.

  After performing the above welding, the case 50 is attached. Thereby, the coil component 10 as shown in FIG. 1 is formed.

<Effect>
In the coil component 10 having the above-described configuration, the integrated part W1 by welding is more than the one end side (the Y1 side in the integrated part W1 in FIG. 7) of the upper fixed part 43 where the root of the terminal 31a is located. It is provided facing the upper fixing portion 43 at a position away from the other end side (Y2 side in the integrated portion W1 in FIG. 7). Therefore, at the time of welding, it is possible to prevent the metal melting portion W2 from being positioned in the vertical direction of the boundary portion between the binding portion 44 and the upper fixing portion 43. As a result, as shown in FIG. 9B, it is possible to prevent the metal melted portion W2 from dripping down and causing a disconnection at the boundary portion A between the metal melted portion W2 and the terminal 31a.

  The integrated portion W1 is provided in a state having a gap S without contacting the upper fixing portion 43. Thereby, the metal melting part W2 is located on the other end side (the integrated part W1 in FIG. 7) from the one end side (the Y1 side in the integrated part W1 in FIG. 7) of the upper fixing part 43 where the root of the terminal 31a is located. Then, it is possible to position it at a position distant from the Y2 side. Thereby, at the time of welding, it becomes possible to prevent the metal melted portion W2 from dropping at the boundary portion A between the metal melted portion W2 and the terminal 31a due to the metal melted portion W2 hanging downward.

  Furthermore, the presence of the gap S makes it possible to prevent the metal melted portion W2 from coming into contact with the upper fixed portion 43 during welding. As a result, heat is not immediately transmitted to the upper fixing portion 43 and the extension fixing portion 42, thereby preventing damage to the plating of the upper fixing portion 43 and the extension fixing portion 42. Moreover, since the integrated part W1 has separated the clearance S with respect to the upper fixing part 43, the binding part 44 is in a state having a spring property. Therefore, in the binding portion 44, even if an environmental load such as a thermal shock or a vibration shock occurs, the stress applied to the terminal 31a can be relieved, and thereby the disconnection of the terminal 31a can be prevented.

  Moreover, in this Embodiment, the binding part 44 is provided with inclination with respect to the upper fixing part 43 so that the side in which the base of the terminal 31a is located becomes an acute angle. In addition, the coil 30 is located on the opposite side of the base of the terminal 31a with the metal terminal 40 interposed therebetween. For this reason, even when the metal melted portion W2 hangs down during welding, the metal melted portion W2 can be prevented from flowing so as to entrain most of the terminal 31a. Thereby, it is possible to prevent the terminal 31a from being disconnected.

  Further, in the present embodiment, it is preferable that the binding portion 44 is bent within a range of 35 to 55 degrees with respect to the upper fixing portion 43. When the binding portion 44 is bent at such an angle, even when the metal melted portion W2 hangs down during welding, the metal melted portion W2 can be prevented from flowing so as to entrain most of the terminal 31a. In addition, the gap S can be secured satisfactorily. As a result, heat is not immediately transmitted to the upper fixing portion 43 and the extension fixing portion 42, thereby preventing damage to the plating of the upper fixing portion 43 and the extension fixing portion 42.

  In the present embodiment, the metal terminal 40 is provided with an extension fixing portion 42, and the extension fixing portion 42 is fixed to the side surface of the core 20. For this reason, the metal terminal 40 can be satisfactorily fixed to the core 20 by the stretch fixing portion 42.

  Further, in the present embodiment, the binding portion 44 is provided with a narrower width than the stretch fixing portion 42. For this reason, it becomes possible to prevent the heat at the time of welding in the binding portion 44 from being transmitted immediately to the stretch fixing portion 42. As a result, it is possible to better prevent damage to the plating of the stretch fixing portion 42.

  Furthermore, in the present embodiment, the extending and fixing portion 42 is provided with side recesses 42a and 42b that are recessed toward the center in the width direction. Therefore, the adhesive solidification part 61 can be located in the side surface recessed parts 42a and 42b. Here, since the adhesive solidifying portion 61 forms a fillet-like portion with the edge of the stretch fixing portion 42, the stretch fixing portion 42 can be firmly fixed to the terminal recess 25.

<Modification>
Although one embodiment of the present invention has been described above, the present invention can be variously modified in addition to this. This will be described below.

  In the above-described embodiment, the binding portion 44 is provided in a state of being inclined with respect to the upper fixing portion 43. However, the binding portion 44 is not limited to be inclined with respect to the upper fixing portion 43. Examples thereof are shown in FIGS. 10 and 11. FIG. 10 is a side view showing an image of welding of the terminal 31a and the binding portion 44 according to a modification of the present embodiment. FIG. 11 is a side view showing an image of welding the terminal 31a and the binding portion 44 according to another modification.

  In the configuration of FIG. 10, the binding portion 44 is configured to be bent twice from the upper fixing portion 43. Further, in the configuration shown in FIG. 11, the binding portion 44 is configured to be bent three times from the upper fixing portion 43. Even in such a configuration, the integrated portion W1 is not positioned in the vertical direction of the boundary portion between the binding portion 44 and the upper fixing portion 43, but is shifted from the boundary portion. Therefore, at the time of welding, it is possible to prevent the metal melted portion W2 from dripping down and causing a disconnection at the boundary portion A between the metal melted portion W2 and the terminal 31a.

  Moreover, in the above-mentioned embodiment, the case where it is a common mode noise filter as the coil component 10 is demonstrated. However, the present invention can of course be applied to coil components other than the common mode noise filter. For example, the present invention can of course be applied to various coil components including a normal mode noise filter, an inductor, a transformer, and the like.

  Further, for example, a coil component 10 having a configuration as shown in FIG. 12 may be used. FIG. 12 is a perspective view showing a configuration of a coil component 10 according to a modified example different from FIGS. 10 and 11. FIG. 12 shows a configuration in which cap members 60 are provided at both ends of the rod-shaped core 20 and the metal terminals 40 are attached to the cap members 60. Further, the binding portion 44 of the metal terminal 40 is provided with the integrated portion W1 as described above. Even with such a configuration, the disconnection of the terminal 31a can be satisfactorily prevented.

DESCRIPTION OF SYMBOLS 10 ... Coil components, 20 ... Core, 23 ... Reel part, 24 ... Reel part, 25 ... Recess for terminal, 26 ... Protrusion part, 27 ... Recess for nail, 30 ... Coil, 31 ... Wire, 31a ... Terminal, 40 ... Metal terminal, 41 ... Mounting terminal (corresponding to a part of the terminal base), 42 ... Extension fixing part (corresponding to a part of the terminal base), 42a, 42b ... Side recess, 43 ... Upper fixing part (terminal base) , 44 ... binding part, 50 ... case, 51 ... top surface part, 52 ... leg part, 53 ... core receiving part, 54 ... locking claw, 60 ... cap member, 61 ... adhesion Solidification part, W1 ... integration part, W2 ... metal melting part,

Claims (6)

A core made of a magnetic material;
A coil formed by winding a wire around the core;
A terminal base located on the core side, and at least a part of the terminal base is attached to the core, and further includes an entangled portion with which the terminal of the coil is entangled, and the entangled portion and the terminal base A metal terminal where the base of the terminal is located on one end side which is a boundary part;
With
A part of the binding part and the terminal constitute an integrated part integrated by welding,
The integrated part is provided in a state having a gap between the terminal part and the facing part facing the binding part.
The integrated portion is provided opposite to the facing portion at a position farther to the other end side than the one end side in the facing portion ,
The binding portion is formed by being bent at least twice with respect to the facing portion;
When connecting the leading end side of the binding portion and the boundary portion, the connected line is provided to be inclined with respect to the facing portion so that the side where the root is located has an acute angle,
The coil is located on the opposite side of the metal terminal with respect to the root,
Coil parts characterized by that. The coil component according to claim 1,
The binding portion is provided to be inclined with respect to the facing portion so that the side where the root is located has an acute angle,
The coil is located on the opposite side of the metal terminal with respect to the root,
Coil parts characterized by that. The coil component according to claim 2,
The binding portion is provided to be inclined within a range of 35 to 55 degrees with respect to the facing portion.
Coil parts characterized by that. The coil component according to any one of claims 1 to 3 ,
The terminal base is provided with an extension fixing part that is fixed to the core, and the extension fixing part is fixed to a side surface of the core,
In the stretch fixing portion, the facing portion is continuous, and the facing portion is located on the top surface portion of the core.
Coil parts characterized by that. The coil component according to claim 4 ,
The binding portion is provided with a narrower width than the stretch fixing portion,
Coil parts characterized by that. The coil component according to claim 4 or 5 , wherein
The extension fixing part is provided with a side recess that is recessed toward the center side in the width direction of the extension fixing part.
Coil parts characterized by that.

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