CN110289149A - coil parts - Google Patents

Abstract

The invention provides a coil component, which can insulate a coil from a terminal and is a vertically arranged coil component. The coil component is provided with: a coil component body (10) having an annular insulating case (2) that houses the annular core (1) and a plurality of coils (5) that are wound around the insulating case (2) and arranged in an annular shape; a plurality of terminals (40) connected to the end of the coil (5) and provided along the coil component body (10); and an insulating plate (30) which is interposed between the coil component body (10) and the terminal (40), and which is provided along the coil component body (10) so as to be orthogonal to the central axis of the insulating case (2); a plurality of extraction holes (32) for extracting the end of the coil (5) to the outer surface side of the insulating plate (30) on the side opposite to the surface along the coil component body are separately provided in the insulating plate (30).

Description

coil parts

technical field

The present invention relates to a coil component having an annular core (core) and a plurality of coils (coil).

Background technique

A common mode choke coil (common choke coil) is known as an electromagnetic noise filter used on a circuit board. This common mode choke coil removes common mode noise. The so-called common mode refers to the conductive path that flows from the reference ground through the wiring on the substrate and returns to the reference plane in order to generate a small stray capacitance between the reference ground on which the substrate is installed and the substrate. In the common mode choke coil, for example, two conductive wires are wound around a toroidal core to form two coils. The winding directions of the coils are opposite to each other, and when a common-mode current flows through the coils, magnetic fluxes are generated in the same direction, and the magnetic fluxes reinforce each other to block the passage of the common-mode current, thereby functioning as an inductor. On the other hand, when a differential mode current flows through the coil, the directions of the generated magnetic fluxes are reversed, the magnetic fluxes cancel each other out, and the differential mode current flows smoothly. In this way, the filter does not function as an inductor for differential mode currents, but only functions as an inductor for common mode currents.

[Prior art literature]

[Patent Document]

[Patent Document 1] Japanese Patent Utility Model Publication No. Hei 6-48820

Contents of the invention

[Problem to be Solved by the Invention]

When a substrate using coil components represented by a common mode choke coil is used with a large current, it is necessary to enlarge the circuit pattern provided on the substrate. Therefore, the space for disposing the coil components on the substrate is limited. If the coil components are installed horizontally such that the ring-shaped central axis is perpendicular to the substrate as in the past, there is a problem that it cannot be installed.

Therefore, it is conceivable to arrange vertically so that the central axis of the ring is parallel to the substrate. However, since most of the coil parts are away from the substrate when placed vertically, it is necessary to provide terminals connected to the ends of the coils included in the coil parts. In this case, since the terminal is provided near the coil component such that one end is connected to the end of the coil and the other end is connected to the substrate, it is difficult to ensure insulation between the coil and the terminal.

The present invention is made to solve the above-mentioned problems, and an object of the present invention is to provide a vertical coil component capable of insulating a coil and a terminal.

[Technical means to solve the problem]

The coil component of the present invention includes: a coil component body having an annular insulating case for accommodating an annular core, and a plurality of coils wound on the insulating case and arranged in an annular shape; a plurality of terminals connected to the coil and an insulating plate interposed between the coil part body and the terminal and along the center axis of the insulating case in a manner orthogonal to the The coil part body is provided; and the insulating plate is separately provided with a plurality of holes for drawing the end of the coil to the outer surface side of the insulating plate opposite to the surface along the coil part body extraction hole.

[Effect of the invention]

According to the present invention, it is possible to obtain a vertical coil component capable of insulating a coil and a terminal.

Description of drawings

FIG. 1 is an overall perspective view of a coil component according to an embodiment.

Fig. 2 is an exploded perspective view of the coil component of the embodiment.

Fig. 3 is a perspective view of an insulating case.

Fig. 4 is a front view of the insulating case.

Fig. 5 is a side view of the insulating case.

Fig. 6 is a perspective view showing the inner surface side of the insulating plate.

Fig. 7 is a perspective view showing the outer surface side of the insulating plate.

Fig. 8 is a perspective view of a terminal.

Fig. 9 is a view for explaining a manufacturing process of a coil component body.

Fig. 10 is a diagram for explaining a coil component main body clamping step.

Fig. 11 is a diagram for explaining a caulking step.

FIG. 12 is a diagram for explaining a coil component of another embodiment.

Explanation of reference signs:

1: ring core

2: Insulation shell

5: Coil

10: Coil part body

20: Insulation member

21, 22: covered part

23: Protrusion

30: insulation board

31: Protrusion

31a: Fastening part

32: extraction hole

33: Keeping Department

33a: plate-shaped body

33b: Fastening hole

34: hole

35: turn back part

40: terminal

40a, 40b: ends of terminals

41: Warped edges

42: hole

231: contact part

232: Center Side Recess

233: Outer peripheral recess

233a: bottom surface

233b: wall

233c: Convex part

x, y, z: direction

Detailed ways

Hereinafter, a coil component according to an embodiment of the present invention will be described with reference to the drawings.

[1. Implementation method]

[1-1. Outline configuration]

FIG. 1 is an overall perspective view of a coil component according to an embodiment. Fig. 2 is an exploded perspective view of the coil component of the embodiment.

As shown in FIGS. 1 and 2 , the coil component of this embodiment includes a coil component body 10, two insulating plates 30, and terminals 40, and the two insulating plates 30 to which the terminals 40 are fixed are separated from the roughly annular coil component body. The two sides of 10 are sandwiched, thereby integrally fixing the coil component body 10 , the two insulating plates 30 and the terminals 40 . This coil component is vertically placed on the substrate so that the axis of the annular center hole of the coil component body 10 is parallel to the substrate, and the portion of the terminal 40 protruding from the insulating plate 30 is electrically connected to the substrate-shaped circuit. This coil component is, for example, a common mode choke coil.

[1-2. Detailed configuration]

Next, each configuration of the coil component will be described in detail. In this specification, the z-axis direction shown in the drawings is referred to as the "upper" side, and the opposite direction is referred to as the "lower" side. The term "upper" or "lower" refers to the positional relationship of each configuration of the coil component, and indicates the positional relationship when the coil component is mounted on a substrate to be installed. That is, for convenience of description, it is assumed that the coil component is mounted on a substrate parallel to the xy plane, and the y-axis direction is defined as the ring-shaped central axis direction of the coil component body 10 or the insulating case 2, and the z-axis direction is defined as the height. direction.

As shown in FIG. 2 , the coil component body 10 has an annular core 1 , an insulating case 2 and a plurality of coils 5 . The annular core 1 is an annular magnetic body. The annular core 1 is also referred to as annular core. As the magnetic body constituting the annular core 1, a ferrite core, a dust core, or a laminated steel plate can be used.

The insulating case 2 is an overall annular insulating member covering the periphery of the annular core 1 with resin, and insulates the annular core 1 and the coil 5 . The resin constituting the insulating case 2 can be, for example, epoxy resin, unsaturated polyester resin, polyurethane resin, bulk molding compound (Bulk Molding Compound, BMC), polyphenylene sulfide (Polyphenylene Sulfide, PPS), polyethylene terephthalate Butylene glycol formate (Polybutylene Terephthalate, PBT) and other resins.

FIG. 3 is a perspective view of the insulating case 2 . FIG. 4 is a front view of the insulating case 2 . FIG. 5 is a side view of the insulating case 2 . As shown in FIGS. 2 to 5 , the insulating case 2 has an annular covering portion 21 covering one side of the annular core 1 and a covering portion 22 covering the other single surface of the annular core 1 . The covering part 21 and the covering part 22 are resin bodies having a concave shape on the inner surface following the shape of the annular core 1, and the outer circumference of the annular core 1 is formed by combining the covering part 21 and the covering part 22 to form a ring shape.

In addition, the insulating case 2 has a protruding portion 23 . The protruding portion 23 is a portion protruding from the outer surfaces of the covering portion 21 and the covering portion 22 in the annular central axis direction (y-axis direction) and radial direction of the insulating case 2 . Here, three projecting portions 23 are respectively provided on the outer surfaces of the covering portion 21 and the covering portion 22 to insulate the coils 5 . That is, the protruding parts 23 are arranged on the ring at equal intervals so as to be located at the vertices of the equilateral triangle, and one is provided above and two are provided below.

The protruding portion 23 has a contact portion 231 , a central concave portion 232 and an outer peripheral concave portion 233 . The contact portion 231 is an end protruding in the central axis direction (y-axis direction) of the insulating case 2 . As shown in FIGS. 3 and 5 , the contact portion 231 is an edge of the extension portion 23 on a surface parallel to the xz plane of the extension portion 23 , and contacts a flat portion of the inner surface of the insulating plate 30 in parallel.

As shown in FIGS. 3 and 4 , the central recess 232 is provided on the inner peripheral edge of the insulating case 2 . Specifically, the central recess 232 is a recess provided at the end of the protruding portion 23 protruding radially inward of the insulating case 2 . The center side concave portion 232 is provided so as to extend in a direction parallel to the central axis of the insulating case 2 . As shown in FIG. 2 , a Y-shaped insulating member 20 is provided in the insulating case 2 , and three ends of the insulating member 20 are respectively inserted into corresponding center side recesses 232 to insulate the coils 5 .

As shown in FIGS. 3 and 4 , the outer peripheral concave portion 233 is provided on the surfaces of the covering portion 21 and the covering portion 22 that serve as the outer peripheral edge of the insulating case 2 . Specifically, the outer peripheral side recess 233 is a recess provided at the end of the protruding portion 23 protruding outward in the radial direction of the insulating case 2 . The outer peripheral recess 233 is provided so as to extend in a direction parallel to the central axis of the insulating case 2 . The peripheral concave portion 233 is composed of a flat bottom surface 233a approximately along the outer peripheral surface of the insulating case 2, walls 233b erected from both sides of the bottom surface 233a, and a convex portion 233c provided on the bottom surface 233a. The outer peripheral side recess 233 forms a substantially U-shaped recess by the bottom surface 233a and the walls 233b on both sides, and the protrusion 31 of the insulating plate 30 described later is inserted into the recess to engage the insulating plate 30 with the coil component body 10 ( Refer to Figure 1). As shown in FIGS. 3 to 5 , the convex portion 233 c is provided so as to protrude from the bottom surface 233 a and extends in a direction perpendicular to the direction in which the protrusion 31 extends.

The coil 5 is composed of a conductive wire provided with an insulating coating. Here, three coils 5 are provided, and a winding portion for winding a wire around the insulating case 2 is installed between each protruding portion 23 and arranged in a ring shape, and one of the ends is pulled out on the side of one of the insulating plates 30, The other end is pulled out on the other insulating plate 30 side. The coil 5 is an edgewise coil made of flat wires, but the wire material and the winding method are not particularly limited, and other methods such as round wires may also be used. In addition, the number of objects of the coil 5 is not limited to three, What is necessary is just to be two or more.

The insulating plate 30 is a plate-shaped member for fixing the coil component body 10 to the substrate. As shown in FIG. 1 , the insulating plate 30 is larger than the coil part body 10 , is interposed between the coil part body 10 and the terminal 40 , and runs along the coil part body 10 in a manner perpendicular to the central axis of the insulating case 2 . set up. This insulating plate 30 is made of resin. As this resin, resins such as epoxy resin, unsaturated polyester resin, polyurethane resin, BMC, PPS, and PBT can be used, for example.

FIG. 6 is a perspective view showing the inner surface side of the insulating plate 30 . As shown in FIG. 6 , the insulating plate 30 is provided with a plurality of protrusions 31 and a plurality of extraction holes 32 . The protrusion 31 protrudes and extends toward the inner surface of the other insulating plate 30 on the inner surface of the coil component body 10 side. Here, the protrusion 31 has a prism shape, but it may also be a column shape. On the front end side of the protrusion 31, a hook-shaped engaging portion 31a that engages with the convex portion 233c is provided. The engaging portion 31 a is a step provided inside the front end of the protrusion 31 . In other words, the protrusion 31 can also be configured as a snap-fit.

Here, the protrusion 31 is provided on the inner surface of the insulating plate 30 so as to surround the outer side of the coil component main body 10 . Specifically, the protrusions 31 are provided at positions corresponding to the spaces between the coils 5 so as to surround the annular outer peripheral surface of the insulating case 2 . More specifically, the protrusions 31 correspond to the number (here, three) of the ends of the coils 5 extracted from the insulating plates 30, and are provided on the upper side so as to form an equilateral triangle on the circle formed by the insulating case 2. , there are two places below. The interval between the two lower protrusions 31 is narrower than the diameter of the insulating case 2 .

The extraction hole 32 is provided in the vicinity of the protrusion 31 to extract the end of the coil 5 to the outer surface side of the insulating plate 30 opposite to the surface along the coil component body 10 . The size of the extraction hole 32 is approximately the same as the size of the end of the coil 5 . That is, it includes the same size as the end of the coil 5 , a size that is slightly larger, and a size that is slightly smaller to the extent that it can be press-fitted. The number of extraction holes 32 is separated and provided corresponding to the number of coils 5 .

FIG. 7 is a perspective view showing the outer surface side of the insulating plate 30 . As shown in FIG. 7 , holding portions 33 that hold terminals 40 at equal intervals in parallel are provided on insulating plate 30 . The holding portion 33 is provided on the outer surface of the insulating plate 30 . Here, the term "outer surface" refers to the surface opposite to the inner surface facing the coil component main body 10 .

The holding portion 33 holds the terminal 40 . Here, the holding portion 33 is constituted by two plate-like bodies 33a sandwiching both surfaces of the terminal. That is, the plate-like body 33 a is erected on the outer surface of the insulating plate 30 so as to be perpendicular to the insulating plate 30 . The number of holding parts 33 is the same as that of the terminals 40 , and there are three positions here, and extend downward in parallel from the vicinity of the respective extraction holes 32 . The intervals of the holding parts 33 are equal intervals. In addition, an engaging hole 33 b is provided in one of a set of plate-shaped bodies 33 a constituting the holding portion 33 . In the plate-shaped body 33a of the elongated holding portion 33 located at the center of the insulating plate 30, two fastening holes 33b are provided at intervals up and down. , A fastening hole 33b is provided on the lower side.

In the insulating plate 30 , oblong holes 34 are provided on the left and right sides of the central holding portion 33 . The coil 5 is exposed from the hole 34 . The shape of the hole 34 is not particularly limited, and the number thereof is also not particularly limited.

At the lower end of the insulating plate 30 , there is provided a folded portion 35 that is bent toward the outer surface side of the insulating plate 30 . The folded portion 35 is a portion that connects the holding portions 33 and that has a bottom that is in contact with the substrate.

FIG. 8 is a perspective view of the terminal 40 . As shown in FIG. 8 , the terminal 40 is a long plate-shaped conductive member, and electrically connects the end of the coil 5 and the substrate. The terminals 40 correspond to the number of ends of the coil 5 and are provided in the holding portion 33 along the coil component body 10 . The length of the terminal 40 is determined by the distance between the end of the coil 5 and the substrate when the coil component is mounted on the substrate.

As shown in FIG. 1 , the terminal 40 is held by the holding portion 33 at the central portion, and the end portion 40 a not covered by the plate-shaped body 33 a is fixed to the end portion of the coil 5 drawn out from the drawing hole 32 by riveting. and electrical connections. The other end portion 40b protrudes downward from the insulating plate 30 to be exposed, and is electrically connected to the circuit pattern on the substrate by solder or the like.

In addition, in the terminal 40 , a warped edge piece 41 protruding toward one side of the terminal 40 is provided at a position corresponding to the engaging hole 33 b. That is, a square-shaped hole 42 is provided in the portion of the terminal 40 held by the holding portion 33 of the plate-like body 33 a , and the ribs 41 protrude from the inner edge of the hole 42 toward one side of the terminal 40 . Here, at least the ribs 41 are exposed from the holes 42 .

[1-3. Function]

The operation of the coil component of this embodiment will be described in accordance with the manufacturing process using FIGS. 9 to 11 . This coil component is divided into (1) coil component body manufacturing process, (2) coil component body clamping process, and (3) riveting process.

(1) Coil parts body manufacturing process

The coil component body manufacturing step is a step of manufacturing the coil component body. First, as shown in FIG. 9, one side of the annular core 1 is covered with the covering part 21, and the other side of the annular core 1 is covered with the covering part 22, and the covering part 21 and the covering part 22 are bonded together with an adhesive or the like. The edge is fixed, and the insulating shell 2 covers the annular core 1

Then, a flat wire is wound between the extension parts 23 to form the coils 5 respectively. A machine can be used to form this coil 5 . One end of the coil 5 is pulled out on one side, and the other end is pulled out on the other side. Furthermore, the insulating member 20 is inserted into the center side recessed part 232, and it arrange|positions in the inner peripheral part of the insulating case 2, and insulates between the coils 5. Thus, the coil component body 10 is formed.

(2) Coil part body clamping process

As shown in FIG. 10 , the coil component main body clamping step is a process of clamping the coil component main body 10 with the insulating plate 30 . Before this clamping, first, the terminals 40 are respectively inserted between the plate-shaped bodies 33 a constituting the holding portion 33 , and a state in which the terminals 40 are fixed to the insulating plate 30 is set. At this time, when the terminal 40 is inserted between the plate-shaped bodies 33a, the warped edge piece 41 reaches the fastening hole 33b and enters the space of the fastening hole 33b. As a result, even if the terminal 40 is about to move, the terminal 40 is not easy to come out from the holding portion 33 because the warped edge piece 41 touches the peripheral wall of the engaging hole 33 b. Then, the coil component main body 10 is sandwiched between the two insulating plates 30 in the state where the terminal 40 is held via the holding portion 33 in this way.

That is, between the insulating plate 30 on one side and the coil component main body 10, the ends of the coil 5 are respectively drawn out to the outer surface side of the insulating plate 30 through the drawing holes 32 and fixed, and the protrusions 31 are inserted into the outer peripheral side recesses. 233 in. The protrusion 31 and the outer peripheral side recess 233 are provided in a manner to surround the annular outer side of the insulating case 2, so the insulating case 2 is inserted into the area surrounded by the circle passing through the three protrusions 31, and the coil component body 10 is mounted on the insulating case 2. plate 30. More specifically, when the protrusion 31 is inserted into the outer peripheral concave portion 233 side along the bottom surface 233a, the engagement portion 31a on the front end side of the protrusion 31 is warped due to the flexibility of the protrusion 31, and the convexity beyond the outer peripheral concave portion 233 is bent. The portion 233c goes over the rear protrusion 31 and returns straight, and the engaging portion 31a is engaged with the convex portion 233c, thereby preventing the coil component body 10 from falling off the insulating plate 30 . In addition, in the present embodiment, two projections 31 and outer peripheral recesses 233 are provided at two places below and one place above so as to form an equilateral triangle. Therefore, the resin case 2 is placed on the two bottom projections 31 . The other insulating plate 30 is also similar to the coil component body 10 , and the coil component body 10 is also attached to the other insulating plate 30 by using the protrusion 31 and the outer peripheral recess 233 .

(3) Riveting process

Next is the riveting process. That is, as shown in FIG. 11 , one end 40a of the terminal 40 is bent to sandwich the end of the coil 5 extracted from the extraction hole 32 , and is fixed and electrically connected by caulking.

In this way, insulation between the coil 5 and the terminal 40 can be ensured by interposing the insulating plate 30 provided with the extraction hole 32 between the coil 5 and the terminal 40 . In addition, since a plurality of extraction holes 32 are separately provided, positioning of the insulating plate 30 can be performed by passing the ends of the coil 5 through the extraction holes 32 respectively. Then, the coil component body 10 is fixed between the insulating plate 30 by the protrusion 31 and the outer peripheral recess 233 , and the terminal 40 and the coil 5 are fixed by crimping the ends of the terminal 40 and the coil 5 . Furthermore, the terminal 40 is fixed to the insulating plate 30 by the holding portion 33 . In this way, the coil component main body 10 and the terminal 40 are integrally and stably fixed via the insulating plate 30 , so that the central axis of the central hole of the annular core 1 can be vertically placed parallel to the substrate.

[1-4. Effect]

(1) The coil part of this embodiment is provided with: a coil part body 10, a ring-shaped insulating case 2 with accommodating the ring-shaped core 1, and a plurality of coils 5 wound on the insulating case 2 and arranged in a ring shape; A terminal 40, connected to the end of the coil 5, and arranged along the coil part body 10; It is arranged along the coil part body 10; and in the insulating plate 30, it is separately provided with a plurality of extractors that make the end of the coil 5 be drawn out to the outer surface side of the side opposite to the surface along the coil part body of the insulating plate 30. Hole 32.

Thereby, the insulation of the coil 5 and the terminal 40 can be ensured. In addition, the ends of the coil 5 are extracted from the separated extraction holes 32 to the outside of the insulating plate 30, and the ends of the coil 5 are connected to the terminals 40 along the coil component body 10, whereby the ends of the coil 5 The insulating plate 30 can be fixed without falling off from the extraction hole 32 .

(2) In addition, two insulating plates 30 are provided to sandwich the coil component body 10 from both sides so as to be perpendicular to the central axis of the insulating case 2 , and the insulating plates 30 are arranged to form an inner surface along the surface of the coil component body 10 . On the surface, there are a plurality of protrusions 31 extending toward the inner surface of another insulating plate 30, and the insulating case 2 has an annular covering portion 21 covering the annular core 1, a covering portion 22, and an outer peripheral concave portion 233, In addition, the peripheral concave portion 233 is provided on the surface of the covering portion 21 and the covering portion 22 so as to extend in a direction parallel to the central axis of the insulating case 2 , and is inserted into the protrusion 31 .

In this way, the coil component main body 10 can be sandwiched by the insulating plate 30 to which the terminal 40 is fixed, and the coil component main body 10 can be fixed on the insulating plate 30 by the protrusion 31 and the outer peripheral side recess 233, and can be fixed to the insulating plate by caulking. The terminal 40 on 30, the end portion of the coil 5 drawn out to the outside from the extraction hole 32 of the insulating plate 30 is fixed, so the coil part body 10, the two insulating plates 30 and the terminal 40 can be integrally fixed. Therefore, it is possible to obtain a coil component that can be placed vertically on the substrate. Vertical placement can reduce the projected area on the substrate. Therefore, for example, in the case of a large current application of about 50A to 100A, in order to withstand such a large current, the circuit pattern on the substrate has to be thickened, and the installation space of the coil parts is limited, but in this case efficient.

In addition, since the two insulating plates 30 are sandwiched, the coil 5 is exposed between the insulating plates 30, and heat dissipation is improved. It is particularly effective when used for high-current applications where the current flowing through the coil 5 is about 50A to 100A.

(3) The protrusion 31 is provided on the inner surface of the insulating plate 30 so as to surround the outer side of the insulating case 2 , and the outer peripheral recess 233 is provided on the outer peripheral edge of the insulating case 2 .

Accordingly, the coil component main body 10 can be stably fixed to the insulating plate 30, and the coil component can be downsized. That is, although it is also possible to install the coil component body 10 on the insulating plate 30 by providing the protrusion 31 and the outer peripheral recess 233 on the inner periphery of the insulating case 2, since the space for disposing the protrusion 31 and the outer peripheral recess 233 is limited, it cannot Constructs that do not shrink these parts. As a result, the fixing strength of the coil component body 10 to the insulating plate 30 may decrease. Therefore, the diameter of the annular core 1 has to be increased, which tends to increase the size of the coil components. On the other hand, by providing the protrusion 31 and the outer peripheral side recess 233 on the outer peripheral edge of the insulating case 2, the enlargement of the coil component can be suppressed, and the entire coil component main body 10 can be suppressed, so that stable fixation can be realized.

Moreover, by providing the protrusion 31 and the outer peripheral side recessed part 233 on the outer side of the coil component main body 10, it becomes easy to see from the outside, and the assembly work efficiency improves.

(4) The protrusion 31 and the outer peripheral side recess 233 are provided between the coils 5 . Thereby, the dead space (dead space) between the coils 5 can be fully utilized, and miniaturization can be achieved.

(5) A convex portion 233 c is provided on the bottom surface of the outer peripheral concave portion 233 , and a hook-shaped engaging portion 31 a that engages with the convex portion 233 c is provided on the front end side of the protrusion 31 . Thereby, the insulation plate 30 and the coil component main body 10 can be made difficult to detach.

(6) The insulating plate 30 has holding portions 33 that hold the terminals 40 in parallel at equal intervals. Thereby, the insulating distance between the terminals 40 can be ensured, and the insulating plate 30 can be assembled with the coil component main body 10 in a state where the insulating plate 30 holds the terminals 40, thereby improving work efficiency.

(7) The holding portion 33 is made of two plate-like bodies 33 a sandwiching both surfaces of the terminal 40 . Thereby, the terminal 40 can be inserted between the plate-shaped bodies 33a, and the terminal 40 can be fixed to the insulating plate 30. As shown in FIG.

(8) The terminal 40 is provided with a rib 41 that protrudes toward one side, and the plate-shaped body 33 a is provided with a fastening hole 33 b for fastening the rib 41 . Thereby, it is possible to prevent the terminal 40 from coming off from the holding portion 33 .

(9) The coil 5 is an edgewise coil formed of a flat wire. Thereby, heat dissipation and high-frequency characteristics can be improved. That is, if the coil 5 is composed of round wires with a circular cross section, if the round wires are wound on an insulating case, the round wires will be densely packed and the heat dissipation will be poor. In the case of a coil, the distance between the electric wires constituting the coil 5 is widened outside the circumference of the annular core 1, so that the heat dissipation is improved. It is especially effective when used for high-current applications. In addition, although stray capacitance is generated by forming a coil between electric wires, since the distance between the electric wires is widened, the stray capacitance can also be reduced, and high-frequency characteristics can also be improved.

In addition, flat wire is generally more difficult to machine than round wire. Therefore, it is difficult to adjust the withdrawal position of the end portion of the coil 5 . On the other hand, in the present embodiment, the terminal 40 and the insulating plate 30 of the fixed terminal 40 are provided, so that the end of the coil 5 can be connected to the substrate via the terminal 40 regardless of the extraction position of the coil 5 . In other words, since the insulating plate 30 provided with the holding portion 33 holding the terminal 40 is slightly larger than the coil component body 10 , the extraction hole 32 can be freely designed within the range in which the insulating plate 30 expands.

[2. Other implementation modes]

This invention is not limited to the said embodiment, The other embodiment shown below is also included. In addition, the present invention also includes forms in which all or any of the above-mentioned embodiment and the following other embodiments are combined. Furthermore, various omissions, substitutions, and changes can be made to these embodiments without departing from the scope of the invention, and the modifications are also included in the present invention. In addition, in the following other embodiments, the parts different from the above-mentioned embodiment will be described, and the same symbols will be attached to the same parts as the above-mentioned embodiment, and the description will be omitted.

In the above-described embodiment, the coil component body 10 is sandwiched by two insulating plates 30 , but at least one insulating plate 30 may be arranged along the direction perpendicular to the center axis of the insulating case 2 from one side of the coil component body 10 . The coil component body 10 is fixed against the coil component body 10 . In this case, extraction holes 32 may be provided in advance for the total number of ends of coils 5 in insulating plate 30 , and all ends of coils 5 may be extracted from one insulating plate 30 .

In addition, protrusions 31 are provided on insulating plate 30 and outer peripheral recesses 233 are provided on insulating case 2 , but protrusions 31 may be provided on insulating case 2 and outer peripheral recesses 233 may be provided on the inner surface of insulating plate 30 .

Furthermore, one end of the terminal 40 and the end of the coil 5 are fixed by caulking, but they may be electrically connected and fixed by brazing, welding, or the like.

In the above-described embodiment, the part of the annular core 1 covering the insulating case 2 is divided into two covering parts 21 and 22, but it is also possible to use a resin mold using a mold using the annular core 1 as an insert. The insulating case 2 is formed by molding, and is constituted as a single resin member. In this case, the protruding portion 23 and the outer peripheral concave portion 233 may be continuously formed of the same resin as the portion covering the annular core 1 .

In the above-described embodiment, the protrusion 31 and the outer peripheral recess 233 are provided so as to surround the outer peripheral edge of the insulating case 2 , but they may also be provided on the inner peripheral portion of the coil component main body 10 . For example, the protrusions 31 may be provided on the inner peripheral side between the coils 5 , and the protrusions 31 may be inserted into the center side recesses 232 to engage the coil component main body 10 and the insulating plate 30 .

In the above-described embodiment, the number of protrusions 31 and outer peripheral recesses 233 is three for each insulating plate 30 , but the present invention is not limited thereto, and may be two or four or more. For example, when the number of protrusions 31 and outer peripheral side recesses 233 is set to four, for example, if two protrusions 31 are provided above and two protrusions 31 are provided below as shown in FIG. The protrusions 31 are provided so that the space between the protrusions 31 is narrower than the diameter of the insulating case 2 , and the space between the upper protrusions 31 is narrower than the space between the lower protrusions 31 . Thereby, the coil component main body 10 can be supported by the protrusion 31 below, and the coil component main body 10 can be stably fixed by the two insulating plates 30. As shown in FIG. Alternatively, the extraction holes 32 may be provided near the protrusions 31 , and the four holding portions 33 may be arranged in parallel at equal intervals for each insulating plate 30 , and the four terminals 40 may be arranged in parallel.

In the above embodiment, the engaging portion 31a is provided on the protrusion 31, and the convex portion 233c is provided on the bottom surface 233a of the outer peripheral concave portion 233, but the engaging portion 31a and the convex portion 233c may not necessarily be provided. For example, the protrusions 31 may be discretely arranged in a ring shape so that the inner peripheral surface thereof is located on a circular ring, and the coil component may be held by a plurality of protrusions 31 so that the insulating case 2 fits into the circular area surrounded by the protrusions 31. Ontology10. That is, the radius from the center of the insulating case 2 to the bottom surface 233 a of the outer peripheral recess 233 is equal to the distance from the center of the insulating case 2 to the inner peripheral surface of the protrusion 31 .

Claims (10)

1. A coil part, characterized in that, comprising: The coil component body has a ring-shaped insulating case for accommodating a ring-shaped core, and a plurality of coils wound on the insulating case and arranged in a ring shape; a plurality of terminals connected to ends of the coil and disposed along the coil part body; and an insulating plate interposed between the coil part body and the terminal, and disposed along the coil part body in a manner orthogonal to a central axis of the insulating case; and In the insulating plate, a plurality of extraction holes for extracting the end of the coil to the outer surface side of the insulating plate opposite to the surface along the coil component main body are separately provided. 2. The coil component according to claim 1, comprising two insulating plates sandwiching the coil component body from both sides so as to be perpendicular to the central axis of the insulating case, The insulating plate has a plurality of protrusions extending toward the inner surface of the other insulating plate on the inner surface along the surface of the coil component body, The insulating case has: an annular covering portion covering the annular core; and The recess extends in a direction parallel to the central axis of the insulating case and is provided on the surface of the covering portion, into which the protrusion is inserted. 3. The coil component according to claim 2, wherein the protrusion is provided on the inner surface of the insulating plate so as to surround the outer side of the insulating case; The recess is provided on the outer periphery of the insulating case. 4. The coil component according to claim 2 or 3, wherein the protrusion and the recess are provided between a plurality of the coils. 5. The coil component according to any one of claims 2 to 4, characterized in that: a convex portion is provided on the bottom surface of the concave portion, A hook-shaped fastening portion that is fastened with the convex portion is provided on the front end side of the protrusion. 6. The coil component according to any one of claims 1 to 5, wherein the insulating plate has holding portions that hold the terminals in parallel at equal intervals. 7. The coil component according to claim 6, wherein the holding portion is a two-plate-shaped body sandwiching both sides of the terminal. 8. The coil component according to claim 7, characterized in that: the terminal is provided with a warping edge that warps to one side, A fastening hole for fastening the warped ribs is provided in the plate-like body. 9. The coil component according to any one of claims 1 to 8, wherein the coil is an edgewise coil made of flat wire. 10. The coil component according to any one of claims 1 to 9, characterized in that it is a common mode choke coil.