CN114496451A - Coil device and method for manufacturing the same - Google Patents

Coil device and method for manufacturing the same Download PDF

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Publication number
CN114496451A
CN114496451A CN202111196586.XA CN202111196586A CN114496451A CN 114496451 A CN114496451 A CN 114496451A CN 202111196586 A CN202111196586 A CN 202111196586A CN 114496451 A CN114496451 A CN 114496451A
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CN
China
Prior art keywords
coil
terminal
base
core
coil device
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Pending
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CN202111196586.XA
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Chinese (zh)
Inventor
石川一彰
尾崎俊亮
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Tokyo Parts Ind Co Ltd
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Tokyo Parts Ind Co Ltd
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Publication of CN114496451A publication Critical patent/CN114496451A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/076—Forming taps or terminals while winding, e.g. by wrapping or soldering the wire onto pins, or by directly forming terminals from the wire
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H01F5/04—Arrangements of electric connections to coils, e.g. leads

Abstract

Provided are a coil device and a method of manufacturing the same, wherein the structure of a terminal portion for external connection and the like are optimized. A coil device (10) is provided with: a coil (12) formed by a wound wire; a core (11) having a winding section (17) for winding the coil (12); a base (13) for fixing the core (11); and a terminal section (19) electrically connected to the coil (12). The base 13 has an insertion hole 139 penetrating the base 13 in the vertical direction and a terminal housing portion housing the terminal portion 19. The terminal section (19) further has a vertical section (195) inserted into the insertion hole (139) and a horizontal section (196) electrically connected to the coil (12). The entire region of the horizontal portion (196) is housed in the terminal housing portion.

Description

Coil device and method for manufacturing the same
Technical Field
The present invention relates to a coil device and a method of manufacturing the same, and more particularly to a coil device having a terminal portion for external connection and a method of manufacturing the same.
Background
Conventionally, coil devices have been used as electronic components such as noise filters.
Fig. 8 is a perspective view showing the coil component 100 described in patent document 1. The coil component 100 mainly has a pedestal 102, a core 101, a coil main body 104, and a mounting pin 103.
The base 102 is made of synthetic resin and has a shape capable of accommodating the core 101 in an upper portion. Mounting pins 103 are arranged at four corners of the base 102.
On the core 101, 2 coil bodies 104 made of flat wires wound edgewise are wound. Here, the winding axis of the coil body 104 is set to be substantially parallel to the mounting surface of the coil component 100. Further, a total of 4 terminals 105 are derived from both end portions of each coil body 104. Each end 105 is connected to a mounting pin 103 disposed at a corner of the base 102.
Non-patent document 1 also discloses a structure similar to that of the coil component 100 disclosed in patent document 1.
Patent document 1: japanese design patent No. 1425406
Non-patent document 1: basic technology advanced supporting industry published by the northeast economic industry institute, which is equal to the 22-year strategy, "development of production technology of common mode line filter for vehicle-mounted electric vehicles" (https:// www.chusho.meti.go.jp/keiei/saponin/portal/seika/2010/22 h-111.pdf) [ search 10/7/10/2020 ]
Disclosure of Invention
Problems to be solved by the invention
However, the coil component 100 having the above-described configuration has room for improvement from the viewpoint of the configuration and the manufacturing method thereof.
Specifically, the lower portion of the mounting pin 103 extending vertically is used for insertion mounting, and the tip 105 is soldered to the upper portion extending horizontally. Here, since the mounting pins 103 are arranged at four corners of the base 102, if upper portions of the mounting pins 103 protrude in the left-right direction, there is a problem that an occupied area required for mounting the coil component 100 becomes large.
Further, in the manufacturing process, when the tip 105 is connected to the mounting pin 103, the tip 105 is wound around an upper portion of the mounting pin 103 to perform temporary connection and then solder connection is performed, but the winding operation of the tip 105 is not easy, and there is a problem in that the manufacturing cost is increased.
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 in which a structure of a terminal portion for external connection and the like are optimized, and a method for manufacturing the same.
Means for solving the problems
The following describes technical means of the present invention made to solve the above problems. The constituent elements used in the respective embodiments described below can be used in any combination as far as possible. The technical means or features of the present invention are not limited to the following descriptions, but are recognized based on the inventions described in the entire specification and drawings or grasped by those skilled in the art from the descriptions.
A 1 st aspect of the present invention relating to a coil device is a coil device including: 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 for fixing the core; and a terminal portion electrically connected to the coil; the base has an insertion hole penetrating the base in the vertical direction and a terminal receiving portion receiving the terminal portion; the terminal portion has a straight 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.
In another aspect of the present invention relating to the coil device, the terminal housing portion is formed by cutting off a corner portion of the base.
In another aspect of the present invention, the coil device is 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.
In another aspect of the present invention relating to the coil device, a distal end of the coil is inserted between the horizontal portion and the base.
In another aspect of the present invention relating to a coil device, the core is a closed magnetic core having straight 1 st and 2 nd windings and no seam; the coil has a 1 st coil wound around the 1 st winding part and a 2 nd coil wound around the 2 nd winding part and having a winding direction opposite to that of the 1 st coil; the coil is formed by winding flat wires flatly.
Further, claim 1 of the present invention relating to a method of manufacturing a coil device is a method of manufacturing a coil device, the coil device including: a coil having a coil portion formed by winding a conductive wire; a core having a winding portion around which the coil is wound; a base for fixing the core; and a terminal portion electrically connected to the coil; the base has an insertion hole penetrating the base in the vertical direction and a terminal receiving portion for receiving the terminal portion; the terminal portion has a straight portion inserted into the insertion hole and a horizontal portion electrically connected to the coil; the horizontal part is accommodated in the terminal accommodating part in the whole area; the method comprises: preparing the core around which the coil is wound and the base in which the terminal portion is fitted; a step of fitting the core into the base; and a step of electrically connecting the terminal portion and the coil.
Effects of the invention
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 accommodating portion of the base. In other words, the horizontal portion is not exposed from the terminal housing portion in front view, plan view, and side view. This enhances the insulation of the terminal portion, and further, the terminal portion does not protrude from the base, so that the coil device as a whole can be downsized.
Further, according to the coil device of the present invention, the horizontal portion of the terminal portion can be accommodated in the terminal accommodating portion formed at the corner portion formed by cutting out the base.
Further, according to the coil device of the present invention, since intermediate processing of the terminal portion is not required, the manufacturing cost required for manufacturing the coil device can be reduced. In addition, damage to the coil end and the soldered connection portion due to the intermediate work can be prevented.
Further, according to the coil device of the present invention, since the terminal of the coil can be inserted between the horizontal portion of the terminal portion and the base, the coil and the terminal portion can be easily connected. Further, in the manufacturing process of the coil device, the end portion of the coil can be temporarily fixed by being inserted between the horizontal portion of the terminal portion and the base, and the coil can be soldered in this state.
Further, according to the coil device of the present invention, the coil device can be used as a line filter by including the closed core, the 1 st coil, and the 2 nd coil.
Further, according to the method of manufacturing a coil device of the present invention, by housing the entire area of the horizontal portion of the terminal portion in the terminal housing portion of the base, the terminal end of the coil and the terminal portion can be connected well in the terminal housing portion.
Drawings
Fig. 1 is a diagram showing a coil device according to an embodiment of the present invention, fig. 1(a) is a perspective view of the coil device as viewed from the front, and fig. 1(B) is a perspective view of the coil device as viewed from the rear.
Fig. 2 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.
Fig. 3 is a diagram showing a chassis of a coil device according to an embodiment of the present invention, fig. 3(a) is a perspective view of the chassis as viewed from the front, and fig. 3(B) is a perspective view of the chassis as viewed from the rear.
Fig. 4 is a plan view showing a base of a coil device according to an embodiment of the present invention.
Fig. 5 is a diagram showing a coil device according to an embodiment of the present invention, and fig. 5(a), 5(B), 5(C), and 5(D) are diagrams showing respective configurations of the front surface of the base at the connection portion of the terminal portion.
Fig. 6 is a diagram showing a coil device according to an embodiment of the present invention, and fig. 6(a), 6(B), 6(C), and 6(D) are diagrams showing respective configurations of the front surface of the base at the connection portion of the terminal portion.
Fig. 7 is a diagram showing a coil device according to an embodiment of the present invention, and is a diagram showing a structure of a front surface of a chassis at a connection portion of a terminal portion.
Fig. 8 is a perspective view showing a coil device according to the related art.
Description of the reference symbols
10 … coil arrangement; 11 … core; 12 … coil; 121 … coil 1; 122 … coil 2; 123 … front end; 124 … rear extremity; 125 … anterior extremity; 126 … rear end; 127 … coil part; 128 … coil portion; 13 … a base; 131 … stand-off; 132 … flat portion; 133 … front surface; 134 … hollowing out; 135 … insertion part; 136 … protrusions; 137 … concave portion; 138a … containment area; 138B … accommodation area; 139 … through hole; 140 … projection; 141 … terminal housing parts; 142 … terminal receiving portion; 143 … terminal receiving parts; 144 … terminal receiving portion; 17 … a winding; 171 … winding part 1; 172 … winding No. 2; 19 … terminal portions; 191 … 1 st front terminal part; 192 … 2 nd front side terminal portion; 193 … 1 st rear terminal part; 194 nd 194 … rear side terminal portions; 195 … straight part; a horizontal portion of 196 …; 20 … imaginary extension line; 21 … imaginary extension line; 100 … coil parts; 101 … core; 102 … stand-off; 103 … mounting pins; 104 … coil body; 105 … end.
Detailed Description
Hereinafter, the coil device 10 and the method of manufacturing the same 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 redundant description thereof is omitted.
Fig. 1(a) is a perspective view of the coil device 10 as viewed from the front, and fig. 1(B) is a perspective view of the coil device 10 as viewed from the rear.
Referring to fig. 1(a) and 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, or the like, for example. The coil device 10 is a mounting component mounted on a mounting surface such as a mounting substrate. As the mounting structure of the coil device 10, insertion, brazing welding, or the like can be employed. As will be described later, the 1 st coil 121 and the 2 nd coil 122 constituting the coil 12 are wound with a conductive wire substantially parallel to the mounting surface of the coil device 10.
The core 11 has a substantially rectangular frame shape when viewed from above. As a material of the core 11, a magnetic body such as an amorphous alloy, a silicon steel plate, ferrite, or the like can be used. Details of the core 11 will be described later with reference to fig. 2.
The coil 12 is made of a wire formed by winding. Specifically, the coil 12 is formed by winding a flat wire edgewise. The surface of the wire constituting the coil 12 is covered with a thin resin film (e.g., a film made of urethane resin). As will be described later with reference to fig. 2, the coil 12 includes a 1 st coil 121 and a 2 nd coil 122.
The base 13 is a member formed of synthetic resin or the like and configured to be able to fix the core 11, and its structure and the like will be described later with reference to fig. 3.
The terminal portion 19 is a connection mechanism electrically connected to the coil 12 and disposed at the lower end of the coil device 10. The terminal portion 19 is formed by bending a conductive wire made of copper, aluminum, or the like. Specifically, the terminal portion 19 includes a 1 st front terminal portion 191 connected to the front end 123 of the 1 st coil 121, a 2 nd front terminal portion 192 connected to the front end 125 of the 2 nd coil 122, a 1 st rear terminal portion 193 connected to the rear end 124 of the 1 st coil 121, and a 2 nd rear terminal portion 194 connected to the rear end 126 of the 2 nd coil 122. Details of each of these terminal portions 19 will be described with reference to fig. 4 and the like.
Referring to fig. 1(a), the 1 st front terminal portion 191 has a vertical portion 195 and a horizontal portion 196. The vertical portion 195 passes through the base 13 in the vertical direction and leads out downward. The front end 123 is sandwiched or inserted between the horizontal portion 196 and the front surface of the pedestal 131 of the base 13. Further, the connection portion of the horizontal portion 196 and the front end 123 is welded by brazing, not shown. The same applies to the 2 nd front terminal portion 192, the 1 st rear terminal portion 193, and the 2 nd rear terminal portion 194.
Fig. 2 is a perspective view showing the core 11 and the coil 12.
The core 11 is a closed magnetic core without a seam, having a straight 1 st winding portion 171 and a straight 2 nd winding portion 172 as winding portions 17. The 1 st winding portion 171 and the 2 nd winding portion 172 are substantially horizontal to a mounting surface of the coil device 10, not shown.
The coil 12 includes a 1 st coil 121 wound around the 1 st winding part 171 and a 2 nd coil 122 wound around the 2 nd winding part 172 in a winding direction opposite to the 1 st coil 121. In the 1 st coil 121 and the 2 nd coil 122, the sectional shape (conductor width, conductor thickness) and the number of turns of the wire are the same. In this way, the coil device 10 including the 1 st coil 121 and the 2 nd coil 122 can be used as a noise filter or the like as described above. Here, the coil portions 127 and 128 are substantially horizontal to a mounting surface of the coil device 10, not shown.
The 1 st coil 121 has a coil portion 127 formed of a conductive wire wound around the 1 st 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.
The 2 nd coil 122 has a coil part 128 made of a wire wound around the 2 nd winding part 172, a front-side end 125 at which the wire at the front end part of the coil part 128 is unwound, and a rear-side end 126 at which the wire at the rear end part of the coil part 128 is unwound. The coil portion 127 and the coil portion 128 have substantially the same outer diameter and outer circumference.
Fig. 3(a) is a perspective view of the chassis 13 as viewed from the front, and fig. 3(B) is a perspective view of the chassis 13 as viewed from the rear.
Referring to fig. 3(a) and 3(B), the base 13 mainly includes a base 131, a protrusion 140, a housing area 138A, and the like. The base 13 is made of an integrally molded synthetic resin. Further, the core 11 shown in fig. 2 is fixed on the upper surface of the pedestal 131.
The pedestal 131 has a substantially rectangular shape when viewed from above, and is a portion for supporting the core 11. The upper surfaces of the front and rear center portions of the base 131 are formed as flat portions 132.
The protruding portion 140 is formed by protruding the center portion of the pedestal 131 in the left-right direction upward so as to be vertically long in the front-rear direction. The protrusion 140 is embedded in the central opening of the core 11 shown in fig. 2.
The hollowed-out portion 134 is formed by partially recessing the surface of the base 13 in a substantially elliptical shape. Here, the flat portion 132, the accommodation region 138A, and the accommodation region 138B have a hollow portion 134 formed therein. By forming the hollow portion 134, the amount of resin required for manufacturing the base 13 can be reduced, and cost reduction can be achieved.
The insertion portion 135 is a portion formed by partially protruding the front side surface and the rear side surface of the base 131. The insertion portion 135 is provided with an insertion hole 139 that vertically penetrates the insertion portion 135, and a vertical portion 195 into which a terminal portion 19 described later is inserted and fixed. In other words, the insertion portion 135 is a portion 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.
The housing areas 138A and 138B are areas where the upper surface of the base 131 is recessed, and house the coil portion 127 and the lower portion of the coil portion 128 of the coil 12 shown in fig. 2.
The terminal portions 19 are mounted on the front surface portion and the rear surface portion of the base 131, and have the 1 st front side terminal portion 191 or the 2 nd rear side terminal portion 194. Referring to fig. 3(a), the 1 st and 2 nd front terminal portions 191 and 192 are inserted into the insertion holes 139 formed in the insertion portion 135. Referring to fig. 3(B), the 1 st rear terminal portion 193 and the 2 nd rear terminal portion 194 are inserted into the insertion hole 139 formed in the insertion portion 135.
Fig. 4 is a plan view of the base 13. Terminal housing portions 141 and 144 are formed at four corners of the base 13. The terminal receiving portion 141 is formed at the front left end of the base 13, the terminal receiving portion 142 is formed at the front right end, the terminal receiving portion 143 is formed at the rear left end of the base 13, and the terminal receiving portion 144 is formed at the rear right end of the base 13.
Here, the terminal housing portion 141 is a portion formed by cutting out a front left corner of the base 13, and is a region surrounded by a virtual extension line 20 extending the front side of the base 131 in the left direction and a virtual extension line 21 extending the left side of the base 131 in the front direction. The same applies to the terminal receiving portions 142, 143, and 144.
In the present embodiment, the terminal housing portion 141 houses the entire region of the horizontal portion 196 of the 1 st front terminal portion 191. That is, when the chassis 13 is viewed from above, when the chassis 13 is viewed from the front, and when the chassis 13 is viewed from the left, the entire area of the horizontal portion 196 is accommodated in the terminal accommodating portion 141. That is, the horizontal portion 196 does not protrude outward from the side surface of the base 131 when viewed from any of these directions.
Similarly, the 2 nd front terminal portion 192, the 1 st rear terminal portion 193, and the 2 nd rear terminal portion 194 are accommodated in the terminal accommodating portion 142, the terminal accommodating portion 143, and the terminal accommodating portion 144 in the entire areas of the horizontal portion 196.
Thus, the horizontal portion 196 of the 1 st front terminal portion 191 or the 2 nd rear terminal portion 194 does not protrude outward from the outer peripheral portion of the base 131 of the chassis 13, so that the area occupied by the coil device 10 can be reduced, and the mounted coil device 10 can be prevented from short-circuiting with other electronic devices.
Fig. 5(a), 5(B), 5(C), and 5(D) are diagrams showing the respective configurations of the front surface of the chassis at the connection portion of the terminal portion. In each of fig. 5, the front end 123 shown in fig. 1(a) is sandwiched between the pedestal 131 and the horizontal portion 196.
Referring to fig. 5(a), the left end of the insertion portion 135 extends to the virtual extension line 21. This further improves the insulation between the horizontal portion 196 and the mounting surface. Referring to fig. 5(B), the left side surface of the pedestal 131 extends to the virtual extension line 20. This further improves the insulation on the left side surface of the horizontal portion 196.
Referring to fig. 5(C), the insertion portion 135 and the horizontal portion 196 may be disposed such that the front end of the horizontal portion 196 faces inward in the left-right direction. Referring to fig. 5(D), the insertion portion 135 and the horizontal portion 196 may be arranged such that the horizontal portion 196 extends in the front-rear direction.
Fig. 6(a), 6(B), 6(C), and 6(D) are views showing various configurations of the related configurations of the front surface 133 and the horizontal portion 196 of the base 131 of the base 13. In each of fig. 6, the front end 125 shown in fig. 1(a) is held between the front surface 133 and the horizontal portion 196.
Referring to fig. 6(a), the front surface 133 and the horizontal portion 196 of the pedestal 131 are set substantially parallel. 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 held between the front surface 133 and the horizontal portion 196 in the manufacturing process.
Referring to fig. 6(B), here the front surface 133 is inclined with respect to the horizontal portion 196. Specifically, the front surface 133 is an inclined surface inclined rearward toward the right, which is the outside in the left-right direction. By doing so, the front-side tip 125 shown in fig. 1(a) can be appropriately sandwiched between the front surface 133 serving as the inclined surface and the horizontal portion 196.
Referring to fig. 6(C), here, the protrusion 136 may also be formed by partially protruding the front surface 133 of a portion facing the horizontal portion 196 toward the front. The protrusion 136 may be formed in a dot shape, or may be formed in a linear shape continuously extending in a long and narrow manner in the left-right direction. The protruding end of the protruding portion 136 may be disposed near the horizontal portion 196, or may contact the horizontal portion 196. In this way, the front end 125 shown in fig. 1(a) can be more firmly held between the protruding portion 136 and the horizontal portion 196.
Referring to fig. 6(D), here, the concave portion 137 is formed by recessing the front surface 133 of the portion facing the horizontal portion 196 toward the rear. In this way, the front end 125 shown in fig. 1(a) is sandwiched between the horizontal portion 196 and the concave portion 137 in a bent state, and therefore the front end 125 can be sandwiched more firmly.
The configurations shown in fig. 6(a) to 6(D) can be applied to all the connection portions shown in fig. 1. That is, such a connection structure can be applied to the connection structure of the front-side terminal 123 and the 1 st front-side terminal portion 191 shown in fig. 1(a), the connection structure of the rear-side terminal 124 and the 1 st rear-side terminal portion 193 shown in fig. 1(B), and the connection structure of the rear-side terminal 126 and the 2 nd rear-side terminal portion 194.
Another mode of the portion connecting the horizontal portion 196 and the front end 125 will be described with reference to fig. 7. Here, the distance L10 between the front surface 133 of the pedestal 131 and the rear surface of the horizontal portion 196 is made longer than the width of the front-side end 125. By so doing, the front-side end 125 is inserted between the front surface 133 and the horizontal portion 196. With such a configuration, the horizontal portion 196 and the front end 125 can be electrically connected and the front end 125 can be fixed by welding with solder. In addition, with such a configuration, the front end 125 can be temporarily fixed by being inserted between the front surface 133 and the horizontal portion 196 in the manufacturing process. Further, such a configuration can be applied to all the connection portions shown in fig. 1.
Referring to fig. 1 to 3, a method of manufacturing the coil device 10 having the configuration shown in fig. 1 and the like will be described with reference to the above-described drawings.
Referring to fig. 2, the 1 st coil 121 and the 2 nd coil 122 are wound around the core 11. Further, a front end 123 and a rear end 124 are formed at the front end and the rear end of the 1 st coil 121 by unwinding a wire. The 2 nd coil 122 has a front end 125 and a rear end 126 formed by unwinding a wire.
Referring to fig. 2 and 3, the core 11 is fitted 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. The coil portion 127 of the coil 12 and the lower portion of the coil portion 128 are accommodated in the accommodation regions 138A and 138B of the base 13. Terminal portions 19 for connecting the respective ends of the coil 12 are assembled in advance on the base 13, and a predetermined interval L10 is provided between the horizontal portion 196 of each terminal and the facing surface of the base.
Referring to fig. 1(a), the front-side terminal 123 is sandwiched or inserted between the horizontal portion 196 of the 1 st front-side terminal portion 191 and the front surface of the pedestal 131. Further, a soldering iron is pressed against the front end 123 and the horizontal portion 196, and the resin film covering the periphery of the front end 123 is melted and soldered. Thereby, the front end 123 and the 1 st front terminal portion 191 are electrically connected. In addition, the horizontal portion 196 of the 2 nd front terminal portion 192 and the front end 125 are electrically connected by the same process.
Referring to fig. 1(B), the 1 st rear terminal portion 193 is connected to the rear end 124 by the same process. Further, the 2 nd rear terminal portion 194 is connected to the rear end 126.
Through the above steps, the coil device 10 shown in fig. 1 is manufactured.
The present embodiment described above can provide the following main effects.
Referring also to fig. 4, the entire region of the horizontal portion 196 of the 1 st front-side terminal portion 191 and the like is accommodated in the terminal accommodation portion 141 and the like of the chassis 13. In other words, the horizontal portion 196 does not protrude from the terminal housing portion 141 and the like in front view, plan view, and side view. Further, the insulation properties of the 1 st front terminal portion 191 and the like can be enhanced, and further, the 1 st front terminal portion 191 and the like do not protrude to the outside from the base 131 of the chassis 13, so that the coil device 10 as a whole can be downsized.
Referring to fig. 4, the horizontal portion 196 such as the 1 st front-side terminal portion 191 may be received in a terminal receiving portion 141 or the like formed by cutting off a corner portion of the base 131 of the chassis 13.
Referring to fig. 4, since an intermediate process of bending the 1 st front terminal portion 191 and the like inward is not necessary, the manufacturing cost required for manufacturing the coil device 10 can be reduced. Further, it is possible to prevent the breakage or damage of the terminal of the coil 12 or the soldered connection portion due to the intermediate working.
Referring to fig. 1(a), since the front-side terminal 123, which is the terminal of the coil 12, can be inserted between the horizontal portion 196 of the 1 st front-side terminal portion 191 and the front surface of the chassis 13, the 1 st coil 121 and the 1 st front-side terminal portion 191 can be easily connected. Further, referring to fig. 1(a), in the manufacturing process of the coil device 10, the front-side end 123 of the 1 st coil 121 can be temporarily fixed by being inserted between the horizontal portion 196 of the 1 st front-side terminal portion 191 and the chassis 13, and can be soldered in this state. That is, the work of winding the front end 123 around the horizontal portion 196 for temporary fixation can be eliminated. Further, this effect is the same for all the connection portions shown in fig. 1.
Referring to fig. 2, the coil device 10 can be used as a line filter or the like by including the core 11, the 1 st coil 121, and the 2 nd coil 122.
Referring to fig. 4, by housing the entire region of the horizontal portion 196 of the 1 st front-side terminal portion 191 and the like in the terminal housing portion 141 and the like of the chassis 13, the terminal end of the coil 12 and the terminal portion 19 can be connected well inside the terminal housing portion 141 and the like.
The embodiments of the present invention have been described above, but the present invention is not limited to these embodiments, and modifications can be made without departing from the scope of the present invention. Further, the above-described embodiments may be combined with each other.
For example, referring to fig. 1(a), a rectangular core is used as the core 11 in the present embodiment, but a core having another shape may be used as the core 11, and for example, a ring-shaped core may be used as the core 11. In addition, 1 coil can also be designed to be used as an inductor.

Claims (10)

1. A coil device is provided with:
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 for fixing the core; and
a terminal portion electrically connected to the coil;
it is characterized in that the preparation method is characterized in that,
the base has an insertion hole penetrating the base in the vertical direction and a terminal receiving portion for receiving the terminal portion;
the terminal portion has a straight 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.
2. The coil device as set forth in claim 1,
the terminal housing portion is formed by cutting off a corner portion of the base.
3. The coil device as set forth in claim 1,
after the coil is connected to the terminal portion, no intermediate processing is performed for accommodating the horizontal portion in the terminal accommodating portion.
4. The coil device as set forth in claim 2,
after the coil is connected to the terminal portion, no intermediate processing is performed for accommodating the horizontal portion in the terminal accommodating portion.
5. The coil device as set forth in claim 1,
the core is a closed magnetic core without seams and provided with a 1 st winding part and a 2 nd winding part which are linear;
the coil has a 1 st coil wound around the 1 st winding part and a 2 nd coil wound around the 2 nd winding part and having a winding direction opposite to that of the 1 st coil;
the coil is formed by winding flat wires flatly.
6. The coil device as set forth in claim 5,
the terminal housing portion is formed by cutting off a corner portion of the base.
7. The coil device as set forth in claim 5,
after the coil is connected to the terminal portion, no intermediate processing is performed for accommodating the horizontal portion in the terminal accommodating portion.
8. The coil device as set forth in claim 6,
after the coil is connected to the terminal portion, no intermediate processing is performed for accommodating the horizontal portion in the terminal accommodating portion.
9. The coil device according to any one of claims 1 to 8,
the coil is inserted between the horizontal portion and the base at a distal end thereof.
10. A method of 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 for fixing the core; and
a terminal portion electrically connected to the coil;
the base has an insertion hole penetrating the base in the vertical direction and a terminal receiving portion for receiving the terminal portion;
the terminal portion has a straight 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 disclosed device is characterized by being provided with:
preparing the core around which the coil is wound and the chassis in which the terminal portions are incorporated;
a step of fitting the core into the base; and
and electrically connecting the terminal portion and the coil.
CN202111196586.XA 2020-10-28 2021-10-14 Coil device and method for manufacturing the same Pending CN114496451A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020180591A JP2022071556A (en) 2020-10-28 2020-10-28 Coil device and manufacturing method thereof
JP2020-180591 2020-10-28

Publications (1)

Publication Number Publication Date
CN114496451A true CN114496451A (en) 2022-05-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111196586.XA Pending CN114496451A (en) 2020-10-28 2021-10-14 Coil device and method for manufacturing the same

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Country Link
JP (1) JP2022071556A (en)
CN (1) CN114496451A (en)

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