JP2007273757A - Method of manufacturing coil component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a coil component which minimizes a wasteful winding. <P>SOLUTION: The method of manufacturing a coil component comprises a terminal fitting arranging step of arraying first and second relaying lines 52, 62 for first coil components, and first and second relaying lines 52, 62 for the other coil components on a straight line parallel to the alignment direction of terminal fittings 4; a drum core mounting step of mounting drum cores 2 to terminal fittings 4; a coil line routing step of engaging a winding line 3 onto the first relaying line 52 of the first coil component, winding around the winding core, engaging it onto the second relaying line 62, engaging it onto the first relaying line 52 of the other coil component, and routing it as far as the second relaying line 62; first and second relaying line cutting step of cutting the line engaged to the first and second relaying lines 52, 62 at positions in the vicinity of the first and second relaying lines 52, 62; and first and second relaying line step of electrically connecting winding lines engaged to the first and second relaying lines 52, 62 to the first and second relaying lines 52, 62. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a coil component, and more particularly to a method for manufacturing a plurality of coil components.

  Conventionally, a coil component such as a noise filter has been used to remove noise in an electric circuit or the like. In order to improve the mountability to the circuit board, the coil component is configured by connecting a winding wound around a core such as ferrite to a terminal fitting provided on the core. Therefore, the coil component can be easily mounted on the circuit by joining the terminal fitting to the electrode on the circuit with solder or the like.

  Before the coil component is mounted on an electric circuit or the like, the winding needs to be connected to a terminal fitting or the like in advance. As shown in Patent Document 1, a terminal portion is provided as a configuration related to this connection. A configuration is disclosed in which a winding is wound around and connected.

In the coil component disclosed in Patent Document 1, when a plurality of coil components are manufactured at a time, the coil components can be drawn and wound around the plurality of coil components with a single stroke.
Japanese Patent Laid-Open No. 10-22137

  However, in the coil component shown in Patent Document 1, when the winding is drawn and drawn with a single stroke due to the positional relationship between the metal piece that is the terminal fitting and the tangled terminal, the winding of one coil component The distance from the end point to the winding start point of another coil component becomes longer. In this case, the windings that are cut and removed increase, and the windings are wasted. Therefore, an object of this invention is to provide the manufacturing method of the coil components which made the useless part of a coil | winding small as much as possible.

  In order to solve the above problems, the present invention provides a drum core having a columnar core part and a pair of flanges provided at both ends of the core part, and one end part and the other end part wound around the core part. A winding extending outside the drum core, a first terminal fitting provided at one end of the pair of flanges, and a second terminal fitting connected at the other end, A method of manufacturing a plurality of coil components in which one terminal fitting is provided with a first connecting portion connecting one end portion and the second terminal fitting is provided with a second connecting portion connecting the other end portion. provide. In this manufacturing method, a set of first terminal fittings and second terminal fittings related to one coil component and a set of first terminal fittings and second terminal fittings related to other coil components are aligned on a straight line. In addition, a terminal fitting arrangement step for arranging the second connection portion related to one coil component and the first connection portion related to another coil component on a straight line parallel to a straight line, and a set of first terminals. A drum core mounting step of mounting one flange portion of each drum core on the metal fitting and the second terminal metal fitting, and a winding hooked to the first connecting portion related to one coil component, and winding related to the one coil component After winding on the core and hooking on the second connecting part relating to one coil component, hooking on the first connecting part relating to the other coil part and winding on the core part relating to the other coil part And a winding routing step for hooking on the second connection part relating to other coil parts, A first wire portion winding cutting step for cutting the windings that are hooked to the first connecting portions at positions near the first connecting portions, and the windings that are hooked to the respective second connecting portions. The second connecting portion winding cutting step for cutting the wire at a position in the vicinity of each second connecting portion, and electrically connecting the winding hooked to each first connecting portion to the first connecting portion. Cutting to be performed simultaneously or by changing the order of the first connecting step and the second connecting step of electrically connecting the windings hooked to the respective second connecting portions to the second connecting portion. -It has a connection process.

  According to such a manufacturing method, between the adjacent one coil component and another coil component, the second connecting portion that is the winding end position of the one coil component and the winding start position of the other coil component The distance between the first connecting line part and the first coil part can be equal to the distance between one coil part and another coil part. Therefore, the length of the winding positioned between one coil component and another coil component can be minimized.

  In the coil component according to the above manufacturing method, it is preferable that each first connecting portion and each second connecting portion are positioned on the same straight line. According to such a structure, it can be made the same shape in each coil component.

  Further, a first winding position restricting portion and a second winding position restricting portion are respectively defined for each first connecting portion and each second connecting portion, and each first connecting portion is defined in the routing step. The windings hooked to the wire portions are defined with respect to the respective first connecting portions by the respective first winding position restricting portions, and the windings hooked to the respective second connecting portions are It is preferable that the position with respect to each 2nd connection part is prescribed | regulated by each 2nd winding position control part.

  According to such a manufacturing method and the coil component according to the manufacturing method, since each terminal fitting has a winding position restricting portion, the position of the winding is provided in the structure provided by the coil component itself without using an extra jig. Can be regulated. Therefore, in the winding routing step, the winding position can be arranged with the winding position with respect to the connecting portion and the winding position with respect to the drum core being accurately determined by the winding position restricting portion.

  Moreover, it is preferable that the first connecting step and the second connecting step are performed after the first connecting portion winding cutting step and the second connecting portion winding cutting step are performed.

  According to such a manufacturing method, for example, when connecting by welding or the like, an extra winding is already cut and removed, so that a weld ball is stably formed.

  Each of the first connecting portions has a first caulking portion that can sandwich the winding, and a second caulking portion that is located downstream of the first caulking portion in the winding direction of the winding, Each of the second connecting portions includes a third caulking portion that can sandwich the winding, and a fourth caulking portion that is located on the downstream side of the third caulking portion in the winding direction of the winding. After pinching the winding with the first caulking part and the second caulking part and holding the winding with the third caulking part and the fourth caulking part, the first caulking part and the fourth caulking part It is preferable that a 1st connection process and a 2nd connection process are each performed.

  According to such a configuration, the connecting step can be performed in a state where the winding is held by the second caulking portion and the third caulking portion. Therefore, at the time of a connection process, it is suppressed that a coil | winding remove | deviates from a connection part, and a connection operation can be performed stably.

  According to the manufacturing method of the present invention, it is possible to manufacture a coil component while omitting a useless portion of the winding as much as possible.

  Hereinafter, a method for manufacturing a coil component according to an embodiment of the present invention will be described with reference to FIGS. First, the coil component manufactured with the manufacturing method of this invention is demonstrated. The coil component 1 has a size of about 4 mm square, is surface-mounted on a printed wiring board by reflow soldering or the like, and is used as a choke coil in various electronic devices.

  A coil component 1 shown in FIG. 1 includes a drum core 2, a winding 3, and a terminal fitting 4. As shown in FIG. 2, the drum core 2 includes, for example, a Ni—Zn-based magnetic material as a base material, and includes a core portion 21 and a pair of flange portions 22 and 23. The winding core 21 is formed in a substantially column shape, and the winding 3 is wound around it. The pair of flange portions 22 and 23 are respectively the same shape and substantially disk shape, and are integrally provided at both axial ends of the core portion 21. The core part 21 and the pair of flange parts 22 and 23 are arranged coaxially. Moreover, as shown in FIG. 5, adhesive application portions 23 </ b> A and 23 </ b> B are provided in a portion corresponding to a first terminal 5 and a second terminal 6, which will be described later, on the flange portion 23 that is one of the flange portions. Yes.

  The winding 3 is made of a coated copper wire in which a urethane wire is applied to a copper wire. The winding 3 is wound around the core 21 and connected to the terminal fitting 4 (FIG. 1) at one end 31 and the other end 32. Has been.

  The terminal fitting 4 is made of a copper alloy such as phosphor bronze, and is composed of a first terminal 5 and a second terminal 6 as shown in FIG. As shown in FIG. 4, the terminal fitting 4 is formed by punching a plate material integrally as a lead frame 40 described later. The 1st terminal 5 and the 2nd terminal 6 are arrange | positioned in parallel, and are comprised symmetrically in the surface orthogonal to the parallel direction. Therefore, the first terminal 5 will be described as a representative.

  The first terminal 5 is mainly composed of a first mounting part 51 and a first connection part 52. The first mounting portion 51 is made of a substantially rectangular plate, and one surface side (upper side in the paper surface) is a joining portion with the drum core 2, and the other surface side (lower side in the paper surface) is a circuit board (not shown) It is a mounting part. A first connecting portion 52 is provided at one end of the first mounting portion 51 in the longitudinal direction.

  The first connecting portion 52 is in a state where the winding 3 is not yet connected, and the first mounting portion 51 is bent between the first mounting portion 51 so as to be parallel to the plane of the first mounting portion 51. The first peripheral edge 52 </ b> A is defined on the outer peripheral portion of the part 51. The first connecting portion 52 includes a first winding position restricting portion 52B, a first winding holding portion 52C that is a second caulking portion, and a first electrical joint portion 52D that is a first caulking portion. ing.

  The first winding position restricting portion 52B is defined from a part of the first peripheral edge 52A located in the vicinity of the connecting portion bending portion, and the first peripheral edge 52A that defines the first winding position restricting portion 52B is defined. A part of the first mounting portion 51 extends in a direction orthogonal to the longitudinal direction. Further, the length of a part of the first peripheral edge 52A related to the first winding position restricting portion 52B in the direction orthogonal to the longitudinal direction of the first mounting portion 51 is at least larger than the diameter of the winding 3 (FIG. 2). It is configured as follows.

  The first winding holding part 52C is provided in the vicinity of a part of the first peripheral edge 52A that defines the first winding position restricting part 52B, and includes an arm part that can hold the winding 3.

  The first electrical joint 52D is provided at a position farther from the first winding holding part 52C than the first winding position restricting part 52B. Therefore, the first winding holding part 52C is located on the winding part side in the core part 21 (FIG. 2) from the first electrical joint part 52D on the path of the winding 3. The first electrical joint 52D also includes the same arm as the first winding holding part 52C.

  Further, in the first mounting portion 51, a pair of first fillet forming pieces extending toward one surface at one end portion in the short direction and at the position on the side opposite to the second terminal 6 in the first mounting portion 51. 53, 53 are provided. The first fillet forming pieces 53 and 53 are provided so that a fillet is preferably formed when the coil component 1 is mounted on a circuit board (not shown).

  Similarly to the first terminal 5, the second terminal 6 is also provided with a second mounting portion 61, a second connecting portion 62, and second fillet forming pieces 63, 63, and the second connecting portion 62 is provided on the outer peripheral portion thereof. While the second peripheral edge 62A is defined, the second winding position restricting portion 62B, the second winding holding portion 62C that is the third caulking portion, and the second electrical joint portion 62D that is the fourth caulking portion. I have.

  As shown in FIG. 4, the lead frame 40 including the terminal fitting 4 has a frame 41 extending in the longitudinal direction. The frame 41 is provided with a plurality of terminal fittings 4 such that the alignment direction of the first terminal 5 and the second terminal 6 is substantially parallel to the longitudinal direction of the frame 41.

  Hereinafter, a method for manufacturing the coil component 1 from the drum core 2, the winding 3, and the terminal fitting 4 configured as described above will be described. First, as a terminal fitting arrangement step, a lead frame 40 shown in FIG. 4 is prepared. In the lead frame 40, the first terminal 5 and the second terminal 6 relating to the coil component 1 ′ being manufactured are substantially parallel to each other in the longitudinal direction of the first mounting portion 51 and the second mounting portion 61, respectively. It arrange | positions so that the direction of the connection part 52 and the 2nd connection part 62 may become the same. In addition, a set of first terminal 5 and second terminal 6 related to one coil component 1 ′ being manufactured, and a pair of first terminal 5 and second terminal related to another adjacent coil component 1 ′ being manufactured. 6 are aligned in a straight line, and the second connection portion 62 relating to the other coil component 1 ′ being manufactured adjacent to the second connection portion 62 relating to the one coil component 1 ′ being manufactured, Are arranged on a straight line parallel to the straight line. Moreover, in all the terminal fittings 4, all the 1st connection parts 52 and the 2nd connection parts 62 are located on the same straight line.

  The drum core 2 shown in FIG. 5 is attached to the lead frame 40 (drum core mounting step). Specifically, adhesive application locations 23 </ b> A and 23 </ b> B provided on one flange 23 of the drum core 2 are positioned on the first mounting portion 51 of the first terminal 5 and the second mounting portion 61 of the second terminal 6. The drum core 2 is arranged as described above. Since the first terminal 5 and the second terminal 6 are integrated by the frame 41, when the drum core 2 is disposed, the adhesive application locations 23A and 23B, the first mounting portion 51, and the second mounting portion 61 Is prevented from occurring, and the drum core 2 can be placed on the terminal fitting 4 with high accuracy.

  Since the adhesive is applied to the adhesive application portions 23A and 23B in the drum core 2, the adhesive is cured with the drum core 2 disposed on the lead frame 40 as shown in FIG. The metal fitting 4 is fixed integrally.

  Next, as shown in FIG. 8, the winding 3 is routed (winding routing step). The winding 3 is extended from the nozzle 3A, fixed to a fixing portion (not shown), and then routed to the first connecting portion 52 of the coil component 1 'being manufactured. Specifically, the winding 3 is disposed on the lower surface of the first connecting portion 52 from the position of the first electrical joint portion 52D and wired to the first winding holding portion 52C side. The winding 3 that has passed the first winding holding portion 52C is wired on the upper surface side of the first connecting portion 52, and is hooked on the first winding position restricting portion 52B. And it extends toward the core part 21 (FIG. 3) of the drum core 2 and is wound around the core part 21.

    A part of the first peripheral edge 52A in the first winding position restricting portion 52B is from the first electrical joint portion 52D which is a direction intersecting the direction in which the winding 3 is led out toward the core portion 21 of the drum core 2. It extends in the direction toward the first winding holder 52C. In the first winding position restricting portion 52B, the winding 3 is wired from the lower surface side to the upper surface side of the first connecting portion 52 at a position in the vicinity of the first winding holding portion 52C and hooked on a part of the first peripheral edge 52A. The winding 3 is bent before and after the first winding position restricting portion 52B because it is stopped and led out toward the winding core portion 21 side. Therefore, the bent portion of the winding 3 is hooked on the first winding position restricting portion 52B, and the arrangement position of the winding 3 can be defined. Thereby, the shift | offset | difference with respect to the 1st terminal 5 of the coil | winding 3 is prevented, Therefore The connection of the coil | winding 3 can be ensured.

  As shown in FIG. 3, the winding 3 is wound around the winding core portion 21 a plurality of times and then led out toward the second connecting portion 62 as shown in FIG. 4. And it is hooked by the 2nd winding position control part 62B from the upper surface side of the 2nd connection part 62, and is drawn around from the 2nd winding holding part 62C position to the lower surface side of the 2nd connection part 62, Wiring is made to the two electrical junction 62D side. And it is derived | led-out from the edge part position of 2nd electrical junction part 62D out of the 2nd connection part 62, the routing of the coil | winding 3 which concerns on one coil component 1 'in manufacture is complete | finished, The winding 3 is routed to the first connecting portion 52 related to the coil component 1 ′ being manufactured and wired in the same manner.

  By winding the winding 3 in this way, the coil component 1 ′ being manufactured is related between the adjacent coil component 1 ′ being manufactured and the coil component 1 ′ being manufactured. The distance of the winding 3 between the second connecting portion 62 that is the winding end position and the first connecting portion 52 that is the winding start position related to the other coil component 1 ′ being manufactured is one manufacturing. This is the shortest distance equal to the distance between the coil component 1 'and another coil component 1' being manufactured. Accordingly, the length of the winding 3 positioned between one coil part 1 'being manufactured and another coil part 1' being manufactured can be minimized.

  Further, since the first terminal 5 and the second terminal 6 have the first winding position restricting portion 52B and the second winding position restricting portion 62B, respectively, the coil component 1 itself is provided without using an extra jig. The position of the winding 3 can be regulated by the structure. Accordingly, in the winding routing step, the winding position for the first connecting portion 52 and the second connecting portion 62 and the winding position for the drum core 2 by the first winding position restricting portion 52B and the second winding position restricting portion 62B. The winding 3 can be arranged with accuracy.

  After the windings 3 are routed around all the first connection parts 52 and the second connection parts 62 applied to the terminal fittings 4 connected to the frame 41, as shown in FIG. The electrical joint 52D, the first winding holding part 52C, the second winding holding part 62C, and the second electrical joining part 62D are caulked and wound at the first connecting part 52 and the second connecting part 62. Line 3 is retained.

  In this case, it is necessary to securely hold and hold the winding 3 in the first winding holding portion 52C. However, in the first electrical joining portion 52D, at least the winding 3 is placed in the first electrical joining portion 52D. That's fine. The same applies to the second connection portion 62.

  After the winding 3 is held in the first connecting portion 52 and the second connecting portion 62, the winding 3 that is hooked on the first connecting portion 52 is set to the first connecting portion 52 as shown in FIG. 9B. While cutting at the position near the connecting portion 52, the winding 3 hooked on the second connecting portion 62 is cut at the position near the second connecting portion 62 (first connecting portion winding cutting step, second Connecting part winding cutting process).

  In the state where the winding 3 is cut, as shown in FIG. 10, the arc welding device 3 </ b> B performs welding by welding (first connecting process, second connecting process). In this case, in the first connection portion 52, the first electrical joint portion 52D is melted and welded to the winding 3 (FIG. 9). In the second connecting portion 62, the second electrical joint portion 62D is melted and welded to the winding 3 (FIG. 9).

  Since the winding 3 is held by the first winding holding portion 52C and the second winding holding portion 62C, even if the first electrical joint 52D and the second electrical joint 62D are melted, the first joint The winding 3 is prevented from being detached from the wire portion 52 and the second connecting portion 62. Therefore, it is possible to stably perform the connecting work during the connecting process.

  Further, since the connecting step is performed after the unnecessary winding 3 is cut, the amount of the winding 3 held by the first electrical joint 52D and the second electrical joint 62D is substantially constant. It has become. Since the 1st terminal 5 and the 2nd terminal 6 are symmetrical shapes, the magnitude | size of 1st electrical junction part 52D and 2nd electrical junction part 62D is also substantially equal. Therefore, the welding ball formed by welding the first electrical joint 52D and the second electrical joint 62D through the connecting step is stably formed in substantially the same shape as shown in FIG. . Therefore, it is suppressed that the welding ball becomes large and the dimension related to the outer shell of the coil component 1 changes.

  Then, as shown in FIG. 12, the terminal fitting 4 is separated from the frame 41 to complete the plurality of coil components 1.

  The method of manufacturing a coil component according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the present embodiment, all the first connection parts 52 and the second connection parts 62 are arranged on a straight line parallel to the straight line in which the first terminals 5 and the second terminals 6 are arranged. Not limited to this, as shown in FIG. 13, at least the first connection portion 52 of the first coil component 1 ′ and the second connection portion 62 of the other coil component 1 ′ are connected to the first terminal 5 and It suffices to be on a straight line parallel to the straight line on which the second terminals 6 are arranged.

  Even in such a configuration, the winding end position of one coil part 1 ′ being manufactured between one adjacent coil part 1 ′ being manufactured and another coil part 1 ′ being manufactured can be The distance of the winding 3 between the second connecting portion 62 and the first connecting portion 52 that is the winding start position of another coil component 1 ′ being manufactured is the same as that of the coil component 1 ′ being manufactured. The distance is equal to the distance between the coil part 1 ′ and the other coil part being manufactured. Accordingly, the length of the winding 3 positioned between one coil part 1 'being manufactured and another coil part 1' being manufactured can be minimized.

The perspective view of the coil components which concern on embodiment of this invention. The side view which shows the core and coil | winding of the coil components which concern on embodiment of this invention. The perspective view which concerns on the terminal metal fitting of the coil components which concerns on embodiment of this invention. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The perspective view which shows a lead frame. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The perspective view which shows a drum core. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The perspective view which shows the state which fixed the drum core to the lead frame. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The perspective view which shows the state which removed the connection part from the lead frame. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The perspective view which shows a coil | winding routing process. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The partial perspective view which shows the state by which the winding was crimped. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The partial perspective view which shows a coil | winding cutting process. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The perspective view which shows a connection process. It is a figure which shows the manufacturing process of the coil components which concern on embodiment of this invention, Comprising: The perspective view which shows the state after a connection process. It is a figure which shows the manufacturing process of the coil component which concerns on embodiment of this invention, Comprising: The perspective view which shows the state which the coil component was completed. The figure which shows the coil | winding routing process which concerns on the modification of embodiment of this invention.

Explanation of symbols

1, 1 ', coil part 2, drum core 3, winding 3A, nozzle 3B, arc welder 31, one end 32, other end 4, terminal fitting 5, first terminal 6 ..Second terminal 21..Core part 22..Hook 23..Hook 23A, 23B..Adhesive application point 40..Lead frame 41..Frame 51..First mounting part 52 .. First connecting portion 52A, First peripheral edge 52B, First winding position restricting portion 52C, First winding holding portion 52D, First electrical joint 53, First fillet forming piece 61, First Two mounting parts 62, second connecting part 62A, second peripheral edge 62B, second winding position restricting part 62C, second winding holding part 62D, second electrical joint 63, second Fillet forming piece

Claims (5)

A drum core having a columnar core portion and a pair of flanges provided at both ends of the core portion, and a winding wound around the core portion and having one end and the other end extending outside the drum core A first terminal fitting provided on one of the pair of flanges and having one end thereof connected thereto, and a second terminal fitting provided with the other end thereof, the first terminal fitting comprising: A method of manufacturing a plurality of coil components in which a first connecting portion for connecting the one end portion is provided and a second connecting portion for connecting the other end portion is provided in the second terminal fitting. ,
A set of first terminal fittings and second terminal fittings related to one coil component and a set of first terminal fittings and second terminal fittings related to other coil components are aligned on a straight line, and A terminal fitting arrangement step of arranging the second connection portion relating to the coil component and the first connection portion relating to the other coil component on a straight line parallel to the straight line;
A drum core mounting step of mounting each of the flange portions of each of the drum cores to each set of the first terminal metal fitting and the second terminal metal fitting,
After the winding is hooked to the first connecting part related to one coil part, wound around the core part related to one coil part, and hooked to the second connecting part related to one coil part Winding routing that is hooked to the first connecting portion related to other coil components, wound to the core portion related to other coil components, and hooked to the second connecting portion related to other coil components Process,
A first wire portion winding cutting step for cutting the windings that are hooked to the respective first connecting portions at positions near the respective first connecting portions, and the hooks that are hooked to the respective second connecting portions. A second connecting portion winding cutting step for cutting the winding at a position in the vicinity of each of the second connecting portions, and the winding hooked on each of the first connecting portions. A first connecting step for electrically connecting the wire portions, and a second connecting step for electrically connecting the windings hooked to the second connecting portions to the second connecting portions, And a cutting and connecting step for performing the steps simultaneously or by changing the order.   2. The method of manufacturing a coil component according to claim 1, wherein each of the first connection portions and each of the second connection portions are located on the same straight line. Each of the first connection portion and each of the second connection portions is provided with a first winding position restricting portion and a second winding position restricting portion, respectively.
The windings that are hooked to the respective first connecting portions in the winding routing step are defined with respect to the respective first connecting portions by the respective first winding position restricting portions, The position of each of the windings hooked to each of the second connecting portions is defined with respect to each of the second connecting portions by each of the second winding position restricting portions. The manufacturing method of the coil component in any one of Claim 1 or Claim 2.   The first connecting step and the second connecting step are performed after the first connecting portion winding cutting step and the second connecting portion winding cutting step are performed. The manufacturing method of the coil components as described in any one of Claims 1-3. Each of the first connecting portions includes a first caulking portion that can sandwich the winding, and a second caulking portion that is located downstream of the first caulking portion in the winding direction of the winding. Have
Each of the second connecting portions includes a third caulking portion that can sandwich the winding, and a fourth caulking portion that is located downstream of the third caulking portion in the winding direction of the winding. Have
The first caulking part, the second caulking part and the second caulking part, and the third caulking part and the fourth caulking part, and the first caulking part, 5. The method of manufacturing a coil component according to claim 4, wherein the first connecting step and the second connecting step are respectively performed in the fourth caulking portion.

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