JP7632864B2 - Coil device and method for manufacturing same - Google Patents

Description

The present invention relates to a coil device and a manufacturing method thereof, and in particular to a coil device having a terminal portion for external connection and a manufacturing method thereof.

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

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

The base 102 is made of synthetic resin and has a shape that allows the core 101 to be housed in the upper part. Mounting pins 103 are arranged at the four corners of the base 102.

Two coil bodies 104 made of edgewise wound rectangular wire are wound around the core 101. Here, the winding axis of the coil body 104 is approximately parallel to the mounting surface of the coil component 100. A total of four ends 105 are led out from both ends of each coil body 104. Each end 105 is connected to a mounting pin 103 arranged at the corner of the base 102.

In addition, a configuration similar to the coil component 100 described in Patent Document 1 is also described in Non-Patent Document 1.

Design Registration No. 1425406

Tohoku Bureau of Economy, Trade and Industry, FY2010 Strategic Basic Technology Advancement Support Project "Development of Production Technology for Common Mode Line Filters for Electric Vehicles" Research and Development Results Report (https://www.chusho.meti.go.jp/keiei/sapoin/portal/seika/2010/22h-111.pdf) [Retrieved October 7, 2020]

However, the coil component 100 configured as described above had room for improvement in terms of its configuration and manufacturing method.

Specifically, the mounting pins 103 have their vertically extending lower portions used for plug-in mounting, and their horizontally extending upper portions soldered to their ends 105. Since the mounting pins 103 are arranged at the four corners of the base 102, if the upper portions of the mounting pins 103 protrude in the left-right direction, there is a problem that the area required for mounting the coil component 100 becomes large.

Furthermore, in the manufacturing process, when connecting the end 105 to the mounting pin 103, a temporary connection is made by wrapping the end 105 around the upper part of the mounting pin 103, and then the solder connection is made. However, the wrapping work of the end 105 is not easy, which poses a problem of increasing manufacturing costs.

The present invention was made in consideration of the above circumstances, and the object of the present invention is to provide a coil device and a manufacturing method thereof in which the configuration of the terminal portion for external connection is optimized.

The coil device of the present invention comprises a coil having a coil portion made of a wound conductor, 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, wherein the base has an insertion hole penetrating the base in the vertical direction and a terminal accommodating portion in which the terminal portion is accommodated, the terminal portion has 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 accommodated in the terminal accommodating portion , and a terminal of the coil is clamped between the horizontal portion and the base .

In addition, the coil device of the present invention comprises a coil having a coil portion made of a wound conductor, 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, wherein the base has an insertion hole penetrating the base in the vertical direction and a terminal accommodating portion in which the terminal portion is accommodated, the terminal portion has 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 accommodated in the terminal accommodating portion, and a gap is formed between the horizontal portion and the base for temporarily fixing a terminal of the coil, and the terminal of the coil is inserted through the gap only once .

In the coil device of the present invention, the terminal accommodating portion is formed by cutting out a corner of the base .

In addition, the coil device of the present invention is characterized in that after the coil and the terminal portion are connected, no intermediate processing is performed to accommodate the horizontal portion in the terminal accommodating portion .

In addition, in the coil device of the present invention, the core is a continuous closed magnetic core having a linear first winding portion and a linear second winding portion, and the coil has a first coil wound around the first winding portion and a second coil wound around the second winding portion and having a winding direction opposite to that of the first coil, and the coil is constructed by edgewise winding a rectangular wire.

The present invention also provides a method for manufacturing a coil device comprising a coil having a coil portion made of a wound conductor, 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, wherein the base has an insertion hole penetrating the base in the vertical direction and a terminal accommodating portion in which the terminal portion is accommodated, 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 accommodated in the terminal accommodating portion, the method comprising the steps of: preparing the core around which the coil is wound and the base in which the terminal portion is incorporated; incorporating the core into the base; temporarily fixing the terminal of the coil by clamping or inserting it between the horizontal portion and the base; and electrically connecting the terminal portion and the coil.

According to the coil device of the present invention, the entire area of the horizontal part of the terminal part is accommodated in the terminal accommodating part of the base. In other words, the horizontal part is not exposed from the terminal accommodating part in the front view, plan view, and side view. This enhances the insulation of the terminal part, and furthermore, since the terminal part does not protrude from the base, the coil device can be made smaller overall. In addition, by clamping the terminal of the coil between the horizontal part of the terminal part and the base, the terminal of the coil and the terminal part can be easily connected.

Furthermore, 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 accommodating portion in a front view, a plan view, or a side view. This enhances the insulation of the terminal portion, and furthermore, since the terminal portion does not protrude from the base, the coil device can be made smaller overall. Furthermore, the terminal of the coil can be temporarily fixed by inserting it between the horizontal portion of the terminal portion and the base, and the terminal of the coil and the terminal portion can be easily connected.

Furthermore, according to the coil device of the present invention, the horizontal portion of the terminal can be accommodated in the terminal accommodating portion formed in the corner portion formed by cutting out the base.

Furthermore, 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. Also, damage to the coil terminals and solder connections due to the intermediate processing can be prevented.

In addition, the coil device of the present invention can be used as a line filter by having a closed magnetic core, a first coil, and a second coil.

According to the manufacturing method of the coil device of the present invention, the entire area of the horizontal part of the terminal part is accommodated in the terminal accommodating part of the base, so that the terminal of the coil and the terminal part can be satisfactorily connected in the terminal accommodating part. Furthermore, the terminal of the coil can be temporarily fixed by being clamped or inserted between the horizontal part of the terminal part and the base, and can be electrically connected in this state.

1A and 1B are diagrams showing a coil device according to an embodiment of the present invention, in which FIG. 1A is a perspective view of the coil device as seen from the front, and FIG. 1B is a perspective view of the coil device as seen 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. 1A and 1B are diagrams showing a base of a coil device according to an embodiment of the present invention, in which FIG. 1A is a perspective view of the base as seen from the front, and FIG. 1B is a perspective view of the base as seen from the rear. 2 is a top view showing a base of a coil device according to an embodiment of the present invention; FIG. 1A to 1D are diagrams showing a coil device according to an embodiment of the present invention, in which (A), (B), (C) and (D) are diagrams showing the configurations of the front surface of the base at the connection portion of the terminal portion. 1A to 1D are diagrams showing a coil device according to an embodiment of the present invention, in which (A), (B), (C) and (D) are diagrams showing the configurations of the front surface of the base at the connection portion of the terminal portion. 1 is a diagram showing a coil device according to an embodiment of the present invention, illustrating the configuration of the front surface of the base at the connection portion of the terminal portion. FIG. FIG. 1 is a perspective view showing a coil device according to the background art.

The coil device 10 according to an embodiment of the present invention and its manufacturing method will be described in detail below with reference to the drawings. In the following description, the same components are generally designated by the same reference numerals, and repeated description will be omitted.

Figure 1(A) is a perspective view of the coil device 10 seen from the front, and Figure 1(B) is a perspective view of the coil device 10 seen from the rear.

Referring to FIG. 1(A) and FIG. 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, for example, as a line filter, a noise filter, a common mode noise filter, a transformer, etc. The coil device 10 is also a mounting component that is mounted on a mounting surface of a mounting board or the like. The mounting structure of the coil device 10 can be a plug or solder welding, etc. As described later, the first coil 121 and the second coil 122 that constitute the coil 12 are wound with conductors substantially parallel to the mounting surface of the coil device 10.

The core 11 has a generally rectangular frame shape when viewed from above. The material of the core 11 may be a magnetic material such as an amorphous alloy, silicon steel plate, or ferrite. Details of the core 11 will be described later with reference to FIG. 2.

The coil 12 is made of a wound conductor. Specifically, the coil 12 is made of a rectangular wire wound edgewise. The surface of the conductor that constitutes the coil 12 is coated 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 is made of a first coil 121 and a second coil 122.

The base 13 is a member made of synthetic resin or the like that is configured to fix the core 11, and its configuration will be described later with reference to FIG. 3.

The terminal portion 19 is a connection means 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 conductor made of copper, aluminum, or the like. Specifically, the terminal portion 19 has a first front terminal portion 191 connected to the front terminal 123 of the first coil 121, a second front terminal portion 192 connected to the front terminal 125 of the second coil 122, a first rear terminal portion 193 connected to the rear terminal 124 of the first coil 121, and a second rear terminal portion 194 connected to the rear terminal 126 of the second coil 122. Details of each of these terminal portions 19 will be described with reference to FIG. 4, etc.

Referring to FIG. 1(A), the first 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 up-down direction and extends downward. The front terminal 123 is sandwiched or inserted between the horizontal portion 196 and the front surface of the pedestal 131 of the base 13. Furthermore, the connection portion between the horizontal portion 196 and the front terminal 123 is welded with solder (not shown). This 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.

Figure 2 is an oblique view showing the core 11 and coil 12.

The core 11 is a continuous closed magnetic core having a winding portion 17 consisting of a linear first winding portion 171 and a linear second winding portion 172. The first winding portion 171 and the second winding portion 172 are substantially horizontal to the mounting surface of the coil device 10, which is not shown here.

The coil 12 has a first coil 121 wound around a first winding section 171, and a second coil 122 wound around a second winding section 172 and having an opposite winding direction to the first coil 121. The first coil 121 and the second coil 122 have the same cross-sectional shape (conductor width, conductor thickness) and number of turns of the conductor. In this way, the coil device 10 including the first coil 121 and the second coil 122 can be used as a noise filter, as described above. In addition, the coil parts 127 and 128 are approximately horizontal to the mounting surface of the coil device 10, which is not shown here.

The first coil 121 has a coil section 127 consisting of a conductor wound around the first winding section 171, a front terminal 123 formed by unwinding the conductor at the front end of the coil section 127, and a rear terminal 124 formed by unwinding the conductor at the rear end of the coil section 127.

The second coil 122 has a coil section 128 made of a conductor wound around the second winding section 172, a front terminal 125 formed by unwinding the conductor at the front end of the coil section 128, and a rear terminal 126 formed by unwinding the conductor at the rear end of the coil section 128. Coil sections 127 and 128 have approximately the same outer diameter and outer periphery.

Figure 3(A) is a perspective view of the base 13 seen from the front, and Figure 3(B) is a perspective view of the base 13 seen from the rear.

Referring to Fig. 3(A) and Fig. 3(B), the base 13 mainly includes a pedestal 131, a protruding portion 140, and a storage area 138A. The base 13 is made of an integrally molded synthetic resin. The core 11 shown in Fig. 2 is fixed to the upper surface of the pedestal 131.

The base 131 has a generally rectangular shape when viewed from above and is a portion that supports the core 11 described above. The upper surfaces of the front center and rear center portions of the base 131 are flat portions 132.

The protrusion 140 is formed by protruding the center of the base 131 in the left-right direction upward so that it is vertically long in the front-rear direction. The protrusion 140 is fitted into the central opening of the core 11 shown in FIG. 2.

The recessed portions 134 are formed by partially recessing the surface of the base 13 into a roughly elliptical shape. Here, the recessed portions 134 are formed in the flat portion 132, the storage area 138A, and the storage area 138B. By forming the recessed portions 134, the amount of resin required to manufacture the base 13 can be reduced, leading to lower costs.

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 passes through the insertion portion 135 in the vertical direction, and the vertical portion 195 of the terminal portion 19 described below is inserted and fixed into the insertion portion 135. 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.

Storage area 138A and storage area 138B are recessed areas on the top surface of base 131, and store the lower parts of coil portion 127 and coil portion 128 of coil 12 shown in FIG. 2.

The terminal portion 19 is attached to the front and rear portions of the base 131, and has a first front terminal portion 191 to a second rear terminal portion 194. With reference to FIG. 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. With reference to FIG. 3(B), the first rear terminal portion 193 and the second rear terminal portion 194 are inserted into the insertion hole 139 formed in the insertion portion 135.

Figure 4 is a top view of the base 13. Terminal accommodating portion 141 to terminal accommodating portion 144 are formed at the four corners of the base 13. Terminal accommodating portion 141 is formed at the front left end of the base 13, terminal accommodating portion 142 is formed at the front right end, terminal accommodating portion 143 is formed at the rear left end of the base 13, and terminal accommodating portion 144 is formed at the rear right end of the base 13.

Here, terminal accommodating portion 141 is a portion formed by cutting out the front left corner of base 13, and is an area surrounded by imaginary extension line 20 extending the front side edge of pedestal 131 to the left, and imaginary extension line 21 extending the left side edge of pedestal 131 to the front. The same applies to terminal accommodating portion 142, terminal accommodating portion 143, and terminal accommodating portion 144.

In this embodiment, the entire area of the horizontal portion 196 of the first front terminal portion 191 is accommodated in the terminal accommodating 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 accommodating portion 141. That is, when viewed from any of these directions, the horizontal portion 196 does not protrude outward from the side surface of the base 131.

Similarly, 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 portions 142, 143, and 144, respectively.

By doing this, the horizontal portions 196 of the first front terminal portion 191 to the second rear terminal portion 194 do not protrude from the outer periphery of the pedestal 131 of the base 13, the area required for mounting the coil device 10 can be reduced, and further, the mounted coil device 10 can be prevented from shorting out with other electronic devices.

Figures 5(A), 5(B), 5(C) and 5(D) are diagrams showing the configurations of the front surface of the base at the connection portion of the terminal portion. In each diagram in Figure 5, the front terminal 123 shown in Figure 1(A) is clamped between the base 131 and the horizontal portion 196.

Referring to FIG. 5(A), the left end of the insertion portion 135 is extended to the imaginary extension line 21. This further improves the insulation between the horizontal portion 196 and the mounting surface. Also, referring to FIG. 5(B), the left side surface of the base 131 is extended to the imaginary extension line 20. This further improves the insulation on the left side surface of the horizontal portion 196.

Also, referring to FIG. 5(C), the insertion portion 135 and the horizontal portion 196 may be arranged so that the tip of the horizontal portion 196 faces inward in the left-right direction.Also, referring to FIG. 5(D), it is also possible to arrange the insertion portion 135 and the horizontal portion 196 so that the horizontal portion 196 extends in the front-rear direction.

Figures 6(A), 6(B), 6(C) and 6(D) are diagrams showing various forms of the front surface 133 of the pedestal 131 of the base 13 and the related configuration of the horizontal portion 196. In each of the diagrams in Figure 6, the front terminal 125 shown in Figure 1(A) is clamped 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 base 131 are substantially parallel to each other. Furthermore, the distance L10 between the front surface 133 and the horizontal portion 196 is equal to or less than the width (thickness) of the front terminal 125. In this way, the front terminal 125 can be clamped between the front surface 133 and the horizontal portion 196 during 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 that inclines rearward toward the right, which is the outer side in the left-right direction. In this way, the front terminal 125 shown in FIG. 1(A) can be suitably clamped between the inclined front surface 133 and the horizontal portion 196.

Referring to FIG. 6(C), here, the front surface 133 facing the horizontal portion 196 is partially protruded forward to form the protrusion 136. The protrusion 136 may be formed in a dot shape, or in a linear shape that extends continuously in the left-right direction. The tip of the protrusion 136 may be disposed near the horizontal portion 196, or may be in contact with the horizontal portion 196. In this way, the front terminal 125 shown in FIG. 1(A) can be more firmly clamped between the protrusion 136 and the horizontal portion 196.

Referring to FIG. 6(D), here, the front surface 133 of the portion facing the horizontal portion 196 is recessed toward the rear to form the concave portion 137. In this way, the front terminal 125 shown in FIG. 1(A) is clamped in a curved state between the horizontal portion 196 and the concave portion 137, so that the front terminal 125 can be clamped more firmly.

The configurations shown in Figures 6(A) to 6(D) can be applied to all of the connection parts shown in Figure 1. That is, such connection configurations can be applied to the connection structure between the front terminal 123 and the first front terminal portion 191 shown in Figure 1(A), the connection structure between the rear terminal 124 and the first rear terminal portion 193 shown in Figure 1(B), and the connection structure between the rear terminal 126 and the second rear terminal portion 194.

With reference to FIG. 7, another form of the portion where the horizontal portion 196 and the front terminal 125 are connected will be described. Here, the distance L10 between the front surface 133 of the base 131 and the rear surface of the horizontal portion 196 is 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. Even with this configuration, the horizontal portion 196 and the front terminal 125 can be electrically connected and the front terminal 125 can be fixed by welding with solder. Also, even with this configuration, the front terminal 125 can be temporarily fixed by being inserted between the front surface 133 and the horizontal portion 196 in the manufacturing process. Furthermore, this configuration can be applied to all the connection portions shown in FIG. 1.

Based on Figures 1 to 3 and with reference to the above-mentioned figures, a method for manufacturing a coil device 10 having the configuration shown in Figure 1 etc. will be described.

Referring to FIG. 2, a first coil 121 and a second coil 122 are wound around the core 11. In addition, a front terminal 123 and a rear terminal 124 are formed at the front and rear ends of the first coil 121 by unwinding the conductor wire. A front terminal 125 and a rear terminal 126 are formed at the front and rear ends of the second coil 122 by unwinding the conductor wire.

Referring to Figures 2 and 3, the core 11 is assembled 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 lower parts of the coil parts 127 and 128 of the coil 12 are stored in the storage areas 138A and 138B of the base 13. The terminal parts 19 for connecting each end of the coil 12 are pre-assembled on the base 13, and a predetermined distance L10 is provided between the horizontal part 196 of each terminal and the opposing surface of the base.

Referring to FIG. 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. A soldering iron is then pressed against the front terminal 123 and the horizontal portion 196 to melt the resin film covering the periphery of the front terminal 123, and solder welding is then performed. This electrically connects the front terminal 123 to the first front terminal portion 191. A similar process is also used to electrically connect the horizontal portion 196 of the second front terminal portion 192 to the front terminal 125.

Referring to FIG. 1B, the first rear terminal portion 193 is connected to the rear terminal 124 in a similar process. Furthermore, the second rear terminal portion 194 is connected to the rear terminal 126.

The above process produces the coil device 10 shown in Figure 1.

The above-described embodiment provides the following major advantages:

Referring to FIG. 4, the entire area of the horizontal portion 196 of the first front terminal portion 191, etc. is accommodated in the terminal accommodating portion 141, etc. of the base 13. In other words, the horizontal portion 196 does not protrude from the terminal accommodating portion 141, etc. in a front view, plan view, or side view. This enhances the insulation of the first front terminal portion 191, etc., and furthermore, since the first front terminal portion 191, etc. does not protrude from the pedestal 131 of the base 13 to the outside, the coil device 10 can be made smaller overall.

Referring to FIG. 4, the horizontal portion 196 of the first front terminal portion 191, etc. can be accommodated in the terminal accommodating portion 141, etc., which is formed by cutting out a corner of the pedestal 131 of the base 13.

Referring to FIG. 4, intermediate processing such as bending the first front terminal portion 191 and the like inward is not required, so the manufacturing costs required for manufacturing the coil device 10 can be reduced. In addition, breakage or damage to the terminals or solder connections of the coil 12 caused by the intermediate processing can be prevented.

Referring to FIG. 1(A), the front terminal 123, which is the terminal 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, so that the first coil 121 and the first front terminal portion 191 can be easily connected. Furthermore, referring to FIG. 1(A), in the manufacturing process of the coil device 10, the front terminal 123 of the first coil 121 is inserted between the horizontal portion 196 of the first front terminal portion 191 and the base 13 to perform temporary fixing, and in this state, solder connection can be performed. In other words, the work of winding the front terminal 123 around the horizontal portion 196 for temporary fixing can be eliminated. Furthermore, the effect is the same for all the connection portions shown in FIG. 1.

Referring to FIG. 2, by having the core 11, the first coil 121 and the second coil 122, the coil device 10 can be used as a line filter, etc.

Referring to FIG. 4, the entire area of the horizontal portion 196 of the first front terminal portion 191, etc. is entirely accommodated in the terminal accommodating portion 141, etc. of the base 13, so that the terminal of the coil 12 and the terminal portion 19 can be satisfactorily connected inside the terminal accommodating portion 141, etc.

Although the embodiment of the present invention has been described above, the present invention is not limited to this, and modifications can be made without departing from the spirit of the present invention. In addition, the above-mentioned embodiments can be combined with each other.

For example, referring to FIG. 1A, in this embodiment, a rectangular core is used as the core 11, but it is also possible to use a core with another shape as the core 11, for example, it is also possible to use an annular core as the core 11. It is also possible to provide only one coil and use it as an inductor.

10...coil device, 11...core, 12...coil, 121...first coil, 122...second coil, 123...front terminal, 124...rear terminal, 125...front terminal, 126...rear terminal, 127...coil portion, 128...coil portion, 13...base, 131...pedestal, 132...flat portion, 133...front surface, 134...thinned portion, 135...insertion portion, 136...projection portion, 137...recessed portion, 138A...storage area, 138B...storage area, 139...insertion hole, 140...projection portion, 141...terminal holder Container 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 terminal portion, 192...second front terminal portion, 193...first rear terminal portion, 194...second rear terminal portion, 195...vertical portion, 196...horizontal portion, 20...virtual extension line, 21...virtual extension line, 100...coil component, 101...core, 102...base, 103...mounting pin, 104...coil body, 105...terminal end

Claims (6)

a coil having a coil portion made of a wound conductive wire;
a core having a winding portion around which the coil is wound;
A base for fixing the core;
A terminal portion electrically connected to the coil,
the base has an insertion hole penetrating the base in a vertical direction and a terminal accommodating portion in which the terminal portion is accommodated,
the terminal portion has a vertical portion inserted into the insertion hole and a horizontal portion electrically connected to the coil,
the horizontal portion has an entire area accommodated in the terminal accommodating portion ,
The terminal of the coil is sandwiched between the horizontal portion and the base .
A coil device comprising: a coil having a coil portion made of a wound conductive wire;
a core having a winding portion around which the coil is wound;
A base for fixing the core;
A terminal portion electrically connected to the coil,
the base has an insertion hole penetrating the base in a vertical direction and a terminal accommodating portion in which the terminal portion is accommodated,
the terminal portion has a vertical portion inserted into the insertion hole and a horizontal portion electrically connected to the coil,
the horizontal portion has an entire area accommodated in the terminal accommodating portion,
a gap is formed between the horizontal portion and the base for temporarily fixing an end of the coil;
The end of the coil passes through the gap only once.
A coil device comprising: 3. The coil device according to claim 1 , wherein the terminal accommodating portion is formed by cutting out a corner of the base. 4. The coil device according to claim 1, wherein after the coil and the terminal portion are connected, no intermediate processing is performed for accommodating the horizontal portion in the terminal accommodating portion. the core is a continuous closed magnetic core having a linear first winding portion and a linear second winding portion,
The coil includes a first coil wound around the first winding portion and a second coil wound around the second winding portion and having a winding direction opposite to that of the first coil,
5. The coil device according to claim 1, wherein the coil is formed by edgewise winding a rectangular wire. a coil device including a coil having a coil portion made of a wound conductor, 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 having an insertion hole penetrating the base in the vertical direction and a terminal accommodating portion for accommodating 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 accommodated in the terminal accommodating portion,
preparing the core around which the coil is wound and the base to which the terminal portion is assembled;
incorporating the core into the base;
a step of temporarily fixing an 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 and the coil.

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