Coil device and method of manufacturing the same

Abstract

Provided are a coil device and a manufacturing method thereof in which the structure of a terminal portion for external connection is optimized. The coil device (10) comprises: a coil (12) formed of a wound conductive wire; a core (11) having a winding portion (17) for winding the coil (12); a base (13) for fixing the core (11); and a terminal portion (19) electrically connected to the coil (12). The base 13 comprises an insertion hole (139) that passes through the base (13) in the vertical direction and a terminal receiving portion for receiving the terminal portion (19). Furthermore, the terminal portion (19) comprises a vertical portion (195) that is inserted into the insertion hole (139) and a horizontal portion (196) that is electrically connected to the coil (12). In addition, the entire area of ​​the horizontal portion (196) is received in the terminal receiving portion.

Description

Technical Field

[0001] The present invention relates to a coil device and a method for manufacturing the same, and in particular to a coil device having a terminal portion for external connection and a method for manufacturing the same. Background Art

[0002] Conventionally, coil devices have been used as electronic components such as noise filters.

[0003] Figure 8 1 is a perspective view showing a coil component 100 described in Patent Document 1. Coil component 100 mainly includes a base 102 , a core 101 , a coil body 104 , and a mounting pin 103 .

[0004] The base 102 is made of synthetic resin and has a shape capable of accommodating the core 101 at its upper portion. Mounting pins 103 are disposed at four corners of the base 102 .

[0005] Two coil bodies 104 composed of flat wires wound flatly are wound on the core 101. Here, the winding axis of the coil body 104 is set to be roughly parallel to the mounting surface of the coil component 100. In addition, a total of four terminals 105 are derived from both ends of each coil body 104. Each terminal 105 is connected to a mounting pin 103 arranged at a corner of the base 102.

[0006] Furthermore, Non-Patent Document 1 also describes a structure similar to coil component 100 described in Patent Document 1.

[0007] Patent Document 1: Japanese Design Patent No. 1425406

[0008] Non-Patent Literature 1: Tohoku Bureau of Economy, Trade and Industry, Research and Development Results Report on "Development of Production Technology for Common Mode Line Filters for Electric Vehicles," a Strategic Basic Technology Advancement Support Project for the 2010 fiscal year (https: / / www.chusho.meti.go.jp / keiei / sapoin / portal / seika / 2010 / 22h-111.pdf)〔Retrieved October 7, 2020〕 Summary of the invention

[0009] Problems to be solved by the invention

[0010] However, the coil component 100 having the above-described structure still has room for improvement from the viewpoint of its structure and manufacturing method.

[0011] Specifically, the lower portion of the mounting pin 103 extending vertically is used for insertion and mounting, and the upper portion extending horizontally is brazed and connected to the terminal 105. Here, since the mounting pin 103 is arranged at the four corners of the base 102, if the upper portion of the mounting pin 103 protrudes in the left-right direction, there is a problem that the area required for mounting the coil component 100 becomes larger.

[0012] Furthermore, in the manufacturing process, when the terminal 105 is connected to the mounting pin 103, the terminal 105 is temporarily connected by winding it around the upper part of the mounting pin 103 and then soldered. However, the winding operation of the terminal 105 is not easy, which leads to an issue of increased manufacturing costs.

[0013] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a coil device having an optimized structure of a terminal portion for external connection and a method for manufacturing the same.

[0014] Means used to solve problems

[0015] The following describes the technical solution of the present invention made to solve the above-mentioned problems. In addition, the constituent elements adopted in each technical solution described below can be adopted in any combination as much as possible. In addition, the technical solution or technical features of the present invention are not limited to the following description, but are identified based on the inventive ideas recorded in the entire specification and the drawings, or those skilled in the art can grasp based on these records.

[0016] The first technical solution of the present invention regarding a coil device is a coil device comprising: a coil having a coil portion formed by a wound conductive wire; a core having a winding portion wound around the coil; a base fixing the core; and a terminal portion electrically connected to the coil; the base having an insertion hole penetrating the base in the up-down direction and a terminal receiving portion receiving the terminal portion; the terminal portion having a vertical portion inserted into the insertion hole and a horizontal portion electrically connected to the coil; the entire area of ​​the horizontal portion being received in the terminal receiving portion.

[0017] Furthermore, in another aspect of the present invention relating to the coil device, the terminal receiving portion is formed by cutting off a corner portion of the base.

[0018] Furthermore, in another aspect of the present invention regarding the coil device, it is characterized in that after the coil and the terminal portion are connected, no intermediate processing for accommodating the horizontal portion in the terminal accommodating portion is performed.

[0019] Furthermore, in another aspect of the present invention regarding the coil device, a terminal end of the coil is inserted between the horizontal portion and the base.

[0020] In addition, in another technical solution of the present invention regarding the coil device, the core is a seamless closed magnetic core having a linear first winding portion and a second winding portion; the coil has a first coil wound on the first winding portion, and a second coil wound on the second winding portion and with a winding direction opposite to that of the first coil; the coil is formed by winding a flat wire in an upright manner.

[0021] In addition, the first technical solution of the present invention regarding the manufacturing method of a coil device is a method for manufacturing a coil device, wherein the coil device comprises: a coil having a coil portion formed by a wound conductive wire; a core having a winding portion wound around the coil; a base fixing the core; and a terminal portion electrically connected to the coil; the base having an insertion hole passing through the base in the up and down directions and a terminal receiving portion receiving the terminal portion; the terminal portion having a vertical portion inserted into the insertion hole and a horizontal portion electrically connected to the coil; the entire area of ​​the horizontal portion being received in the terminal receiving portion; the method comprises: a step of preparing the core wound around the coil and the base into which the terminal portion is loaded; a step of loading the core into the base; and a step of electrically connecting the terminal portion to the coil.

[0022] Effects of the Invention

[0023] According to the coil device of the present invention, the entire area of ​​the horizontal portion of the terminal portion is accommodated in the terminal accommodation portion of the base. In other words, the horizontal portion does not appear from the terminal accommodation portion in the front view, top view, and side view. As a result, the insulation of the terminal portion can be enhanced, and further, since the terminal portion does not protrude from the base, the coil device can be miniaturized as a whole.

[0024] Furthermore, according to the coil device of the present invention, the horizontal portion of the terminal portion can be accommodated in the terminal accommodation portion formed at the corner portion formed by cutting off the base.

[0025] Furthermore, according to the coil device of the present invention, since intermediate processing of the terminal portion is no longer required, the manufacturing cost required for manufacturing the coil device can be reduced. Furthermore, damage to the coil end and the solder connection portion caused by applying intermediate processing can be prevented.

[0026] In addition, according to the coil device of the present invention, since the end of the coil can be inserted between the horizontal portion of the terminal portion and the above-mentioned base, the coil can be easily connected to the terminal portion. Furthermore, in the manufacturing process of the coil device, the end of the coil can be temporarily fixed by inserting it between the horizontal portion of the terminal portion and the base, and soldering can be performed in this state.

[0027] Furthermore, according to the coil device of the present invention, the coil device includes a closed magnetic core, a first coil, and a second coil, and can be used as a line filter.

[0028] Furthermore, according to the method for manufacturing a coil device of the present invention, by accommodating the entire area of ​​the horizontal portion of the terminal portion in the terminal accommodating portion of the base, the end of the coil can be well connected to the terminal portion in the terminal accommodating portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 FIG. 1 is a diagram showing a coil device according to an embodiment of the present invention. Figure 1 (A) is a perspective view of the coil device viewed from the front. Figure 1 (B) is a perspective view of the coil device viewed from the rear.

[0030] Figure 2 1 is a diagram showing a coil device according to an embodiment of the present invention, and is a perspective view showing a core and a coil after the coil is wound.

[0031] Figure 3 1 is a diagram showing a base of a coil device according to an embodiment of the present invention. Figure 3 (A) is a three-dimensional view of the base viewed from the front. Figure 3 (B) is a perspective view of the base viewed from the rear.

[0032] Figure 4 It is a plan view showing a base of a coil device according to one embodiment of the present invention.

[0033] Figure 5 FIG. 1 is a diagram showing a coil device according to an embodiment of the present invention. Figure 5 (A) Figure 5 (B) Figure 5 (C) and Figure 5 (D) is a diagram showing various structures of the front surface of the base at the connection part of the terminal part.

[0034] Figure 6 FIG. 1 is a diagram showing a coil device according to an embodiment of the present invention. Figure 6 (A) Figure 6 (B) Figure 6 (C) and Figure 6 (D) is a diagram showing various structures of the front surface of the base at the connection part of the terminal part.

[0035] Figure 7 It is a figure which shows the coil device concerning one embodiment of this invention, and is a figure which shows the structure of the front surface of a base at the connection part of a terminal part.

[0036] Figure 8 It is a perspective view showing a coil device related to the background art.

[0037] Description of symbols

[0038] 10…coil device; 11…core; 12…coil; 121…first coil; 122…second coil; 123…front end; 124…rear end; 125…front end; 126…rear end; 127…coil portion; 128…coil portion; 13…base; 131…pedestal; 132…flat portion; 133…front surface; 134…hollow portion; 135…insertion portion; 136…protrusion; 137…recessed portion; 138A…accommodation area; 138B…accommodation area; 139…insertion hole; 140…protrusion; 141…terminal accommodating portion; 142…terminal accommodating portion; 143…terminal accommodating portion; 144…terminal accommodating portion; 17…winding portion; 171…first winding portion; 172…second winding portion; 19…terminal portion; 191…first front side terminal portion; 192…second front side terminal portion; 193…first rear side terminal portion; 194…second rear side terminal portion; 195…vertical portion; 196…horizontal portion; 20…imaginary extension line; 21…imaginary extension line; 100…coil part; 101…core; 102…base; 103…mounting pin; 104…coil body; 105…end. DETAILED DESCRIPTION

[0039] Hereinafter, the coil device 10 and the manufacturing method thereof according to the embodiment of the present invention will be described in detail with reference to the drawings. In the following description, the same components are denoted by the same reference numerals in principle, and duplicate descriptions are omitted.

[0040] Figure 1 (A) is a perspective view of the coil device 10 as viewed from the front. Figure 1 (B) is a perspective view of the coil device 10 as viewed from the rear.

[0041] Reference Figure 1 (A) and Figure 1 (B), the coil device 10 mainly includes a core 11, a coil 12, a base 13 and a terminal portion 19. The coil device 10 can be used as a line filter, a noise filter, a common mode noise filter, a transformer, etc. In addition, the coil device 10 is a mounting part mounted relative to a mounting surface such as a mounting substrate. As the mounting structure of the coil device 10, insertion or soldering welding can be adopted. As described later, the first coil 121 and the second coil 122 constituting the coil 12 are wound with a conductor roughly parallel to the mounting surface of the coil device 10.

[0042] The core 11 is in a substantially rectangular frame shape when viewed from above. As a material for the core 11, amorphous alloys, silicon steel plates, ferrite, and other magnetic materials can be used. Figure 2 This will be described later.

[0043] The coil 12 is formed by winding a conductive wire. Specifically, the coil 12 is formed by winding a flat wire in an upright manner. The surface of the conductive wire constituting the coil 12 is covered with a relatively thin resin film (for example, a film made of polyurethane resin). Figure 2 As will be described later, the coil 12 is composed of a first coil 121 and a second coil 122 .

[0044] The base 13 is a member formed of synthetic resin or the like and configured to fix the core 11. Figure 3 This will be described later.

[0045] The terminal portion 19 is electrically connected to the coil 12 and is a connection mechanism disposed at the lower end of the coil device 10. The terminal portion 19 is formed by bending a conductive wire formed of copper, aluminum, or the like. Specifically, the terminal portion 19 has a first front terminal portion 191 connected to the front end 123 of the first coil 121, a second front terminal portion 192 connected to the front end 125 of the second coil 122, a first rear terminal portion 193 connected to the rear end 124 of the first coil 121, and a second rear terminal portion 194 connected to the rear end 126 of the second coil 122. For details of each of these terminal portions 19, refer to Figure 4 etc. for explanation.

[0046] Reference Figure 1 (A) The first front terminal portion 191 has a vertical portion 195 and a horizontal portion 196. The vertical portion 195 penetrates the base 13 in the up-down direction and leads downward. The front terminal 123 is clamped or inserted between the horizontal portion 196 and the front surface of the base 131 of the base 13. Furthermore, the connection portion between the horizontal portion 196 and the front terminal 123 is welded here by brazing (not shown). Such a connection structure is the same for the second front terminal portion 192, the first rear terminal portion 193 and the second rear terminal portion 194.

[0047] Figure 2 It is a perspective view showing the core 11 and the coil 12 .

[0048] The core 11 is a seamless closed magnetic core having a linear first winding portion 171 and a second winding portion 172 as the winding portion 17. The first winding portion 171 and the second winding portion 172 are substantially horizontal to the mounting surface of the coil device 10 (not shown).

[0049] The coil 12 has a first coil 121 wound on the first winding portion 171, and a second coil 122 wound on the second winding portion 172 and wound in a direction opposite to the first coil 121. In the first coil 121 and the second coil 122, the cross-sectional shape (conductor width, conductor thickness) and the number of turns of the conductor are the same. In this way, the coil device 10 including the first coil 121 and the second coil 122 can be used as a noise filter, etc. as described above. In addition, the coil portion 127 and the coil portion 128 are roughly horizontal relative to the mounting surface of the coil device 10 not shown in the figure.

[0050] The first coil 121 includes a coil portion 127 formed of a conductive wire wound on a first winding portion 171 , a front end 123 for unwinding the conductive wire at a front end portion of the coil portion 127 , and a rear end 124 for unwinding the conductive wire at a rear end portion of the coil portion 127 .

[0051] The second coil 122 includes a coil portion 128 formed of a conductive wire wound on the second winding portion 172, a front end 125 unwinding the conductive wire at the front end portion of the coil portion 128, and a rear end 126 unwinding the conductive wire at the rear end portion of the coil portion 128. In addition, the coil portion 127 and the coil portion 128 have substantially the same outer diameter and outer circumference.

[0052] Figure 3 (A) is a perspective view of the base 13 viewed from the front. Figure 3 (B) is a perspective view of the base 13 as viewed from the rear.

[0053] Reference Figure 3 (A) and Figure 3 (B), the base 13 mainly includes a seat 131, a protrusion 140 and a storage area 138A. The base 13 is made of an integrally molded synthetic resin. In addition, Figure 2 The core 11 is shown fixed on the upper surface of the pedestal 131 .

[0054] The pedestal 131 has a substantially rectangular shape when viewed from above, and is a portion that supports the core 11. The upper surfaces of the front center portion and the rear center portion of the pedestal 131 are formed as flat portions 132.

[0055] The protrusion 140 is formed by making the center portion of the base 131 in the left-right direction protrude upward so as to be longitudinally elongated along the front-back direction. Figure 2 The core 11 is shown in the central opening.

[0056] The hollow portion 134 is formed by partially recessing the surface of the base 13 in a substantially elliptical shape. Here, the hollow portion 134 is formed in the flat portion 132, the accommodation region 138A, and the accommodation region 138B. By forming the hollow portion 134, the amount of resin required for manufacturing the base 13 can be reduced, achieving cost reduction.

[0057] The insertion portion 135 is formed by partially protruding the front surface side surface and the rear surface side surface of the base 131. The insertion portion 135 is provided with an insertion hole 139 that passes through the insertion portion 135 in the vertical direction, and a vertical portion 195 of the terminal portion 19 described later is inserted and fixed. In other words, the insertion portion 135 is a part of the base 131 and is a portion through which the vertical portion 195 of the terminal portion 19 is inserted in the vertical direction.

[0058] The storage area 138A and the storage area 138B are areas where the upper surface of the base 131 is recessed to store Figure 2 The coil 12 is shown with reference to the lower portion of the coil portion 127 and the coil portion 128 .

[0059] The terminal portion 19 is mounted on the front surface portion and the rear surface portion of the base 131, and has a first front terminal portion 191 or a second rear terminal portion 194. Figure 3 (A) The first front terminal portion 191 and the second front terminal portion 192 are inserted into the insertion hole 139 formed in the insertion portion 135. Figure 3 (B) The first rear-side terminal portion 193 and the second rear-side terminal portion 194 are inserted into the insertion hole 139 formed in the insertion portion 135 .

[0060] Figure 4 It is a top view of the base 13. Terminal accommodating portions 141 or terminal accommodating portions 144 are formed at the four corners of the base 13. The terminal accommodating portion 141 is formed at the front left end of the base 13, the terminal accommodating portion 142 is formed at the front right end, the terminal accommodating portion 143 is formed at the rear left end of the base 13, and the terminal accommodating portion 144 is formed at the rear right end of the base 13.

[0061] Here, the terminal receiving portion 141 is a portion formed by cutting off the left corner of the front side of the base 13, and is an area surrounded by an imaginary extension line 20 extending the front side of the base 131 to the left and an imaginary extension line 21 extending the left side of the base 131 to the front. This is also the same for the terminal receiving portion 142, the terminal receiving portion 143, and the terminal receiving portion 144.

[0062] In the present embodiment, the entire area of ​​the horizontal portion 196 of the first front terminal portion 191 is accommodated in the terminal accommodation portion 141. That is, when the base 13 is viewed from above, when the base 13 is viewed from the front, and when the base 13 is viewed from the left, the entire area of ​​the horizontal portion 196 is accommodated in the terminal accommodation portion 141. That is, when viewed from any of these directions, the horizontal portion 196 does not protrude from the side surface of the base 131 to the outside.

[0063] Likewise, the entire areas of the horizontal portions 196 of the second front terminal portion 192 , the first rear terminal portion 193 , and the second rear terminal portion 194 are accommodated in the terminal accommodating portion 142 , the terminal accommodating portion 143 , and the terminal accommodating portion 144 , respectively.

[0064] In this way, the horizontal portion 196 of the first front side terminal portion 191 or the second rear side terminal portion 194 will not protrude outward from the outer periphery of the base 131 of the base 13, so that the occupied area required for the installation of the coil device 10 can be reduced, and further, the installed coil device 10 can be prevented from short-circuiting with other electronic devices.

[0065] Figure 5 (A) Figure 5 (B) Figure 5 (C) and Figure 5 (D) is a diagram showing various structures of the front surface of the base at the connection part of the terminal part. Figure 5 In each of the figures, the base 131 and the horizontal portion 196 are connected to Figure 1 (A) shows the front end 123 being clamped.

[0066] Reference Figure 5 (A), the left end of the insertion portion 135 is extended to the imaginary extension line 21. In this way, the insulation between the horizontal portion 196 and the mounting surface is further improved. Figure 5 (B) The left side surface of the base 131 is extended to the imaginary extension line 20. In this way, the insulation of the left side surface side of the horizontal portion 196 is further improved.

[0067] In addition, refer to Figure 5 (C) The insertion portion 135 and the horizontal portion 196 may be arranged so that the front end of the horizontal portion 196 faces inward in the left-right direction. Figure 5 (D) The insertion portion 135 and the horizontal portion 196 may be arranged so that the horizontal portion 196 extends in the front-rear direction.

[0068] Figure 6 (A) Figure 6 (B) Figure 6 (C) and Figure 6(D) is a diagram showing various forms of the related structure of the front surface 133 of the base 131 and the horizontal portion 196 of the base 13. Figure 6 In each of the figures, the front surface 133 and the horizontal portion 196 are used to Figure 1 (A) shows the front end 125 clamped.

[0069] Reference Figure 6 (A) The front surface 133 and the horizontal portion 196 of the pedestal 131 are set to be substantially parallel. In addition, the distance L10 between the front surface 133 and the horizontal portion 196 is set to be equal to or less than the width (thickness) of the front end 125. In this way, the front end 125 can be clamped between the front surface 133 and the horizontal portion 196 during the manufacturing process.

[0070] Reference Figure 6 (B) Here, the front surface 133 is inclined relative to the horizontal portion 196. Specifically, the front surface 133 is an inclined surface that is inclined toward the right direction, which is the outer side in the left-right direction. In this way, the front surface 133 as an inclined surface and the horizontal portion 196 can be appropriately clamped. Figure 1 (A) The front end 125 is shown.

[0071] Reference Figure 6 (C) Here, the protrusion 136 can also be formed by partially protruding the front surface 133 of the portion facing the horizontal portion 196 toward the front. The protrusion 136 can be formed in a dot shape or in a line shape extending continuously and elongated in the left-right direction. The protruding end of the protrusion 136 can be arranged near the horizontal portion 196 or in contact with the horizontal portion 196. In this way, the protrusion 136 and the horizontal portion 196 can be used to form a gap between the protrusion 136 and the horizontal portion 196. Figure 1 The front end 125 shown in (A) is more securely clamped.

[0072] Reference Figure 6 (D) Here, the concave portion 137 is formed by making the front surface 133 of the portion facing the horizontal portion 196 concave toward the rear. Figure 1 The front end 125 shown in (A) is clamped in a bent state between the horizontal portion 196 and the concave portion 137 , so the front end 125 can be clamped more firmly.

[0073] Figure 6 (A) to Figure 6 The structure shown in (D) can be applied to Figure 1 That is, such a connection structure can be applied to Figure 1 (A) shows a connection structure between the front end 123 and the first front terminal 191. Figure 1(B) shows a connection structure between the rear end 124 and the first rear terminal portion 193, and a connection structure between the rear end 126 and the second rear terminal portion 194.

[0074] Reference Figure 7 , describing other forms of the portion connecting the horizontal portion 196 and the front terminal 125. Here, the distance L10 between the front surface 133 of the base 131 and the rear surface of the horizontal portion 196 is made longer than the width of the front terminal 125. In this way, the front terminal 125 is inserted between the front surface 133 and the horizontal portion 196. If such a structure is used, the front terminal 125 can be fixed while the horizontal portion 196 and the front terminal 125 are electrically connected by welding using brazing. In addition, if such a structure is used, the front terminal 125 can be temporarily fixed by inserting it between the front surface 133 and the horizontal portion 196 during the manufacturing process. Furthermore, such a structure can be used for Figure 1 All connections shown apply.

[0075] based on Figures 1 to 3 , while also referring to the above-mentioned figures, while explaining Figure 1 A method for manufacturing the coil device 10 having the structure shown in FIG.

[0076] Reference Figure 2 , a first coil 121 and a second coil 122 are wound around the core 11. In addition, at the front end and rear end of the first coil 121, a front end 123 and a rear end 124 are formed by unwinding a conductive wire. At the front end and rear end of the second coil 122, a front end 125 and a rear end 126 are formed by unwinding a conductive wire.

[0077] Reference Figure 2 and Figure 3 , the core 11 is loaded into the base 13 from above. At this time, the protrusion 140 of the base 13 is inserted into the central opening of the core 11. In addition, the lower parts of the coil portion 127 and the coil portion 128 of the coil 12 are accommodated in the accommodation area 138A and the accommodation area 138B of the base 13. In addition, the terminal portion 19 for connecting the respective ends of the coil 12 is pre-assembled on the base 13, and a prescribed interval L10 is provided between the horizontal portion 196 of each terminal and the opposing surface of the base.

[0078] Reference Figure 1(A) The front terminal 123 is clamped or inserted between the horizontal portion 196 of the first front terminal portion 191 and the front surface of the base 131. Then, a soldering iron is pushed against the front terminal 123 and the horizontal portion 196 to melt the resin film covering the periphery of the front terminal 123, and then soldering is performed. Thus, the front terminal 123 is electrically connected to the first front terminal portion 191. In addition, the horizontal portion 196 of the second front terminal portion 192 is electrically connected to the front terminal 125 through the same process.

[0079] Reference Figure 1 (B) Through the same process, the first rear terminal portion 193 is connected to the rear end 124. Furthermore, the second rear terminal portion 194 is connected to the rear end 126.

[0080] Through the above process, the Figure 1 The coil arrangement 10 is shown.

[0081] According to the present embodiment described above, the following main effects can be achieved.

[0082] See also Figure 4 , the entire area of ​​the horizontal portion 196 of the first front terminal portion 191 and the like is accommodated in the terminal accommodation portion 141 and the like of the base 13. In other words, in the front view, the top view, and the side view, the horizontal portion 196 does not extend from the terminal accommodation portion 141 and the like. Furthermore, the insulation of the first front terminal portion 191 and the like can be enhanced, and further, since the first front terminal portion 191 and the like do not protrude from the base 131 of the base 13 to the outside, the coil device 10 can be miniaturized as a whole.

[0083] Reference Figure 4 The horizontal portion 196 such as the first front terminal portion 191 can be accommodated in the terminal accommodating portion 141 formed by cutting off the corner portion of the base 131 of the base 13.

[0084] Reference Figure 4 Since the intermediate processing such as bending the first front terminal portion 191 etc. inward is no longer required, the manufacturing cost required for manufacturing the coil device 10 can be reduced. In addition, the wire breakage or damage of the end of the coil 12 or the soldering connection portion caused by the intermediate processing can be prevented.

[0085] Reference Figure 1 (A) Since the front end 123 as the end of the coil 12 can be inserted between the horizontal portion 196 of the first front terminal portion 191 and the front surface of the base 13, the first coil 121 can be easily connected to the first front terminal portion 191. Figure 1(A) In the manufacturing process of the coil device 10, the front end 123 of the first coil 121 can be temporarily fixed by inserting it between the horizontal portion 196 of the first front terminal portion 191 and the base 13, and the soldering connection can be performed in this state. That is, it is unnecessary to wind the front end 123 around the horizontal portion 196 for temporary fixing. Furthermore, this effect is Figure 1 This is the same for all the connections shown.

[0086] Reference Figure 2 By including the core 11 , the first coil 121 , and the second coil 122 , the coil device 10 can be used as a line filter or the like.

[0087] Reference Figure 4 By accommodating the entire area of ​​the horizontal portion 196 of the first front side terminal portion 191 etc. as a whole in the terminal accommodating portion 141 etc. of the base 13, the end of the coil 12 can be well connected to the terminal portion 19 inside the terminal accommodating portion 141 etc.

[0088] Although the embodiments of the present invention have been described above, the present invention is not limited thereto and can be modified within the scope not departing from the gist of the present invention. In addition, the above-mentioned respective aspects can be combined with each other.

[0089] For example, refer to Figure 1 (A) In this embodiment, a rectangular core is used as the core 11, but a core of another shape may be used as the core 11. For example, a toroidal core may be used as the core 11. In addition, one coil may be designed and used as an inductor.

Claims

1. A coil device comprising: A coil having a coil portion formed of a wound conductive wire; A core having a winding portion around which the coil is wound; A base to fix the core; and A terminal portion, electrically connected to the coil; It is characterized in that The base has an insertion hole penetrating through the base in the up-down direction and a terminal receiving portion receiving the terminal portion; The terminal portion includes a vertical portion inserted into the insertion hole and a horizontal portion electrically connected to the coil; The entire area of ​​the horizontal portion is accommodated in the terminal accommodating portion. The end of the coil is clamped between the horizontal portion and the base.

2. A coil device comprising: A coil having a coil portion formed of a wound conductive wire; A core having a winding portion around which the coil is wound; A base to fix the core; and A terminal portion, electrically connected to the coil; It is characterized in that The base has an insertion hole penetrating through the base in the up-down direction and a terminal receiving portion receiving the terminal portion; The terminal portion includes a vertical portion inserted into the insertion hole and a horizontal portion electrically connected to the coil; The entire area of ​​the horizontal portion is accommodated in the terminal accommodating portion. A gap is formed between the horizontal portion and the base for temporarily fixing the end of the coil. The end of the coil is inserted through the gap only once.

3. The coil device according to claim 1 or 2, characterized in that: The terminal receiving portion is formed by cutting off a corner portion of the base.

4. The coil device according to claim 1 or 2, characterized in that: After the coil is connected to the terminal portion, no intermediate processing is performed to accommodate the horizontal portion in the terminal accommodating portion.

5. The coil device according to claim 1 or 2, characterized in that: The core is a seamless closed magnetic core having a linear first winding portion and a second winding portion; The coil includes a first coil wound on the first winding portion, and a second coil wound on the second winding portion and wound in an opposite direction to the first coil; The coil is formed by winding a flat wire in an angled manner.

6. The coil device according to claim 5, characterized in that The terminal receiving portion is formed by cutting off a corner portion of the base.

7. The coil device according to claim 5, characterized in that After the coil is connected to the terminal portion, no intermediate processing is performed to accommodate the horizontal portion in the terminal accommodating portion.

8. A method for manufacturing a coil device, the coil device comprising: A coil having a coil portion formed of a wound conductive wire; A core having a winding portion around which the coil is wound; A base to fix the core; and A terminal portion, electrically connected to the coil; The base has an insertion hole penetrating through the base in the up-down direction and a terminal receiving portion receiving the terminal portion; The terminal portion includes a vertical portion inserted into the insertion hole and a horizontal portion electrically connected to the coil; The entire area of ​​the horizontal portion is accommodated in the terminal accommodating portion; It is characterized in that have: A step of preparing the core around which the coil is wound and the base into which the terminal portion is mounted; The step of installing the core into the base; A step of temporarily fixing the end of the coil by clamping or inserting the end of the coil between the horizontal portion and the base; and A step of electrically connecting the terminal portion to the coil.

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