CN115132473A - Coil component - Google Patents

Abstract

The invention provides a coil component which can easily realize the expected position relation between a magnetic core and a winding tube part. A coil component (100) comprises: a bobbin part (30) having a through insertion hole (36); a magnetic core (10) having an insertion portion (15) inserted into the insertion hole (36) and an outer arrangement portion arranged outside the bobbin portion (30); a coil (70) wound around the bobbin (30); and a cover member (80) that covers the upper portion of the winding tube part (30), the cover member (80) having a positioning protrusion (86) that positions the magnetic core (10), the positioning protrusion (86) being disposed along the outer surface of the outer arrangement part, the outer arrangement part being restricted from moving away from the winding tube part (30) in the axial direction of the insertion hole (36), or being disposed between the inner surface of the outer arrangement part and the winding tube part (30), the outer arrangement part being restricted from moving closer to the winding tube part (30) in the axial direction of the insertion hole (36).

Description

Coil component

Technical Field

The present invention relates to a coil component.

Background

For example, patent document 1 discloses a coil component.

The coil component of patent document 1 includes: a bobbin portion (described as a bobbin in this document); a coil wound around the bobbin portion; and a magnetic core (described as a core portion in this document) inserted through the bobbin portion.

Patent document 1: japanese patent laid-open publication No. 2017-212355

According to the studies of the present inventors, in the structure of the coil component of patent document 1, there is room for improvement from the viewpoint of bringing the positional relationship between the bobbin portion and the core into a desired positional relationship.

Disclosure of Invention

The present invention has been made in view of the above problems, and provides a coil component having a structure in which a desired positional relationship between a winding tube part and a magnetic core can be easily achieved.

According to the present invention, there is provided a coil component having: a bobbin part having a through insertion hole; a magnetic core having an insertion portion inserted into the insertion hole and an outer arrangement portion arranged outside the bobbin portion; a coil wound around the bobbin; and a cover member that covers an upper portion of the bobbin, the cover member having a positioning projection that positions the magnetic core, the positioning projection being disposed along an outer surface of the outer disposition portion, the outer disposition portion being restricted from moving away from the bobbin in an axial direction of the insertion hole, or being disposed between an inner surface of the outer disposition portion and the bobbin, the outer disposition portion being restricted from moving closer to the bobbin in the axial direction of the insertion hole.

According to the present invention, a desired positional relationship between the bobbin part and the magnetic core can be easily achieved.

Drawings

Fig. 1 is a 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 front view of the coil component of the embodiment.

Fig. 4 is a plan view of the coil component of the embodiment.

Fig. 5 is a side view of the coil component of the embodiment.

Fig. 6 is a sectional view taken along line a-a of fig. 4.

Fig. 7 is a sectional view taken along line B-B of fig. 4.

Fig. 8 (a), 8 (b) and 8 (c) show the cover member of the embodiment, in which fig. 8 (a) is a perspective view, fig. 8 (b) is a front view, and fig. 8 (c) is a bottom view.

Fig. 9 is a perspective view of a coil component according to modification 1 of the embodiment.

Fig. 10 is a side sectional view of a coil component according to modification 1 of the embodiment.

Fig. 11 (a), 11 (b) and 11 (c) show a cover member according to modification 1 of the embodiment, in which fig. 11 (a) is a perspective view, fig. 11 (b) is a front view, and fig. 11 (c) is a bottom view.

Fig. 12 is a side sectional view of a coil component according to modification 2 of the embodiment.

Description of the reference symbols

10: a magnetic core; 11 a: a 1 st magnetic core; 11 b: a 2 nd magnetic core; 12: a base (outer arrangement portion); 12 a: an inner surface; 12 b: an outer surface; 13: an outer leg portion; 15: an insertion section; 20: a main body member; 30: a bobbin part; 31: a barrel portion; 32: an upper wall portion; 33: a lower wall portion; 34: a front wall portion; 35: a rear wall portion; 36: a through insertion hole; 40: a flange portion; 41: 1 st flange part; 41 a: the 1 st side; 42: a 2 nd flange portion; 42 a: the 1 st side; 46: a protrusion portion; 48: a clamped part; 50: a terminal holding portion; 52: a 1 st terminal holding part; 53: the 1 st projection; 55: a 2 nd terminal holding part; 56: the 2 nd protrusion; 60: a terminal portion; 61: a 1 st terminal part; 62: a 2 nd terminal section; 65: an external terminal; 66: winding the terminal; 70: a coil; 71: a winding; 72: a winding section; 80: a cover member; 81: a top surface portion; 81 a: a peripheral edge portion; 81 b: a notch-shaped portion; 82: a side peripheral wall portion; 82 a: a 1 st side wall portion; 82 b: a 2 nd side wall part; 83: a protrusion; 84: a lower extension portion; 84 a: a 1 st abutting surface; 84 b: a 2 nd abutting surface; 85: a main section; 86: a positioning protrusion; 86 a: an inclined surface; 86 b: a step surface; 87: a 2 nd lower extension; 88: a clamping claw; 89 a: a 1 st slit portion; 89 b: a 2 nd slit portion; 91: 1, a first adhesive; 92: a 2 nd adhesive; 94: a buffer material; 96: a gap; 100: a coil component.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to fig. 1 to 12.

In all the drawings, the same components are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

As shown in any one of fig. 1 to 8 (c), the coil component 100 of the present embodiment includes: a bobbin part 30 having a through insertion hole 36; a magnetic core 10 having an insertion portion 15 inserted into the insertion hole 36 and an outer arrangement portion (a base portion 12 in the case of the present embodiment) arranged outside the winding tube portion 30; a coil 70 wound around the bobbin portion 30; and a cover member 80 covering an upper portion of the bobbin part 30.

The cover member 80 has a positioning projection 86 for positioning the magnetic core 10. In the case of the present embodiment, the positioning projection 86 is disposed along the outer surface of the outer disposition portion, and restricts the outer disposition portion from moving away from the winding tube part 30 in the axial direction of the insertion hole 36.

As shown in fig. 7, in the case of the present embodiment, the core 10 is biased toward the axial direction of the insertion hole 36 with respect to the winding tube part 30 by the positioning protrusion 86.

Here, "biased" means that the movement of the core 10 in the other direction is restricted in a state where the positioning protrusion 86 brings the core 10 closer to the one direction side in the axial direction of the insertion hole 36. More specifically, the positioning protrusion 86 is formed in the following state: in the axial direction of the insertion hole 36, the gap between one side of the magnetic core 10 and the winding tube part 30 and the gap between the other side of the magnetic core 10 and the winding tube part 30 are larger than the gap between one side of the magnetic core 10 and the winding tube part 30.

In addition, when the coil component 100 has a pair of magnetic cores 10, for example, the outer arrangement portion here means an outer arrangement portion that the magnetic core 10 on the side where the positioning protrusion 86 is arranged has out of the pair of magnetic cores 10.

According to the present embodiment, the outer arrangement portion is restricted from being separated from the bobbin portion 30 in the axial direction of the insertion hole 36. More specifically, the positioning protrusion 86 restricts the movement of the core 10 in one direction while biasing the core 10 in the other direction in the axial direction of the insertion hole 36. Therefore, a desired positional relationship between the bobbin part 30 and the core 10 can be easily achieved. More specifically, as described later, since the gap 96 is formed between the inner surface of the magnetic core 10 and the bobbin portion 30, expansion and contraction of the magnetic core 10 can be allowed. Therefore, stress application to the magnetic core 10 can be suppressed.

Further, since a desired positional relationship between the bobbin portion 30 and the magnetic core 10 can be easily achieved by the positioning projection 86, the magnetic core 10 can be easily positioned with respect to the bobbin portion 30 without using a dedicated jig in the manufacturing process of the coil component 100. Therefore, the ease of manufacturing coil component 100 can be improved.

In the following description, the vertical direction is referred to as the Z direction. The lower side (lower side) is a side where a terminal portion 60 (fig. 1 and the like) described later is arranged, that is, a mounting surface side where the coil component 100 is mounted. However, the positional relationship (particularly, the positional relationship between the upper and lower portions) of each portion between the time of manufacturing and the time of using the coil component 100 is not limited to the positional relationship described in the present specification.

The axial direction of the through insertion hole 36 extends in a direction perpendicular to the Z direction. The axial direction of the insertion hole 36 is referred to as the Y direction, one of the Y directions is referred to as the front (front), and the other is referred to as the rear (rear).

A direction perpendicular to both the Y direction and the Z direction is referred to as an X direction, one of the X directions is referred to as a right (right) direction, and the other is referred to as a left (left) direction.

These directions are shown in the figures.

In the Y direction, the side where the center position of the insertion hole 36 in the axial direction is located is referred to as an inner side (inner side), and the side opposite to the inner side is referred to as an outer side (outer side). Similarly, in the X direction, the side where the center position of the insertion hole 36 in the left-right direction is located is referred to as an inner side (inner side), and the side opposite to the inner side is referred to as an outer side (outer side).

The direction (direction) perpendicular to the Z direction is referred to as a horizontal direction (horizontal direction), and the direction (direction) along the Z direction is referred to as a vertical direction (vertical direction).

Here, in the case of the present embodiment, the positioning projection 86 presses the outer surface of the outer arrangement portion (in the case of the present embodiment, the outer surface 12b of the base portion of the 1 st magnetic core 11a) in the axial direction of the insertion hole 36 in a direction in which the outer arrangement portion approaches the winding tube portion 30.

Thus, the positioning projection 86 can restrict the relative displacement of the magnetic core 10 with respect to the bobbin 30 in a state where the magnetic core 10 is biased toward the bobbin 30 in the axial direction of the insertion hole 36.

The core 10 includes, for example, a 1 st core 11a and a 2 nd core 11b that are arranged to face each other and combined with each other, at least one of the 1 st core 11a and the 2 nd core 11b has an insertion portion 15, and both the 1 st core 11a and the 2 nd core 11b have an outer arrangement portion.

In the case of the present embodiment, the magnetic core 10 includes, for example, a pair of front and rear core members, that is, a 1 st magnetic core 11a disposed on the front side and a 2 nd magnetic core 11b disposed on the rear side.

More specifically, the 1 st core 11a and the 2 nd core 11b are, for example, so-called E-shaped cores, and have an E-shaped planar shape (see fig. 4).

The 1 st magnetic core 11a has: a base 12 extending in the left-right direction; a pair of outer legs 13 projecting rearward from both end portions of the base 12; and an insertion portion 15 projecting rearward from an intermediate portion of the base portion 12. The protruding direction of the outer leg portion 13 and the insertion portion 15 from the base portion 12 is the same as the axial direction of the insertion hole 36.

The base portion 12 is, for example, long in the left and right directions, and has a rectangular prism shape in a cross-sectional shape perpendicular to the axial direction. In the base portion 12, 2 of the 4 surfaces arranged around the axis are horizontal upper and lower surfaces, respectively, and one of the remaining 2 surfaces (hereinafter referred to as an inner surface 12a) faces the winding tube portion 30 side, and the other (hereinafter referred to as an outer surface 12b) faces the opposite side of the winding tube portion 30. In the case of the present embodiment, the inner surface 12a of the base 12 constitutes the inner surface of the 1 st core 11a, and the outer surface 12b of the base 12 constitutes the outer surface of the 1 st core 11 a.

Each of the outer leg portion 13 and the insertion portion 15 is, for example, long in the front-rear direction, and has a rectangular prism shape in a cross-sectional shape perpendicular to the axial direction. In the base portion 12, 2 of the 4 surfaces arranged around the axis are horizontal upper and lower surfaces, respectively, and one of the remaining 2 surfaces is directed rightward and the other is directed leftward.

The base portion 12, the outer leg portions 13, and the insertion portion 15 are set to have, for example, the same vertical dimensions. In the 1 st magnetic core 11a, the upper surfaces of the base portion 12, the outer leg portion 13, and the insertion portion 15 are arranged on the same plane. That is, the entire upper surface of the 1 st magnetic core 11a is formed flat and horizontally arranged. Similarly, in the 1 st magnetic core 11a, the lower surfaces of the base portion 12, the outer leg portion 13, and the insertion portion 15 are disposed on the same plane. That is, the entire lower surface of the 1 st magnetic core 11a is formed flat and is arranged horizontally.

In the case of the present embodiment, as shown in fig. 2, both the 1 st core 11a and the 2 nd core 11b have the insertion portion 15.

More specifically, the 2 nd magnetic core 11b is formed in the same shape as the 1 st magnetic core 11a, for example. That is, the 2 nd magnetic core 11b has a base portion 12, a pair of outer leg portions 13, and an insertion portion 15. The base 12 has an upper surface, a lower surface, an inner surface 12a, and an outer surface 12 b.

The 2 nd core 11b and the 1 st core 11a are arranged in front-to-back symmetry.

The tip end surface of each outer leg 13 of the 1 st magnetic core 11a and the 2 nd magnetic core 11b in the projecting direction is formed flat and is a vertical surface perpendicular to the axial direction of the insertion hole 36.

Similarly, the tip end surface of each of the insertion portions 15 of the 1 st magnetic core 11a and the 2 nd magnetic core 11b in the protruding direction is formed flat and is a vertical surface perpendicular to the axial direction of the insertion hole 36.

As shown in fig. 3, the inner surface 12a and the outer surface 12b of the base portion 12 are also formed flat and are perpendicular planes to the axial direction of the coil 70. The inner surface of the 1 st core 11a and the inner surface of the 2 nd core 11b face each other, and the outer surface of the 1 st core 11a and the outer surface of the 2 nd core 11b face each other in opposite directions.

As shown in fig. 2, coil component 100 further includes: a main body member 20 having a bobbin portion 30 and a terminal holding portion 50; and a plurality of terminal portions 60 held by the terminal holding portion 50. The coil 71 constituting the coil 70 is wound around the bobbin portion 30.

The bobbin 30 includes, for example, a cylindrical portion 31 and a pair of flanges 40 provided at both axial ends of the cylindrical portion 31.

The cylindrical portion 31 is formed in a square cylindrical shape having a through insertion hole 36 penetrating in the axial direction.

For example, as shown in fig. 2, the tube portion 31 is configured to have an upper wall portion and a lower wall portion, which are horizontally arranged, and a right side wall portion and a left side wall portion, which are vertically arranged.

For example, the inner space of the through insertion hole 36 has a prismatic shape. The bottom surface (inner peripheral bottom surface) and the top surface of the inner peripheral surface of the insertion hole 36 are horizontal surfaces, and the left side surface and the right side surface of the inner peripheral surface of the insertion hole 36 are vertical surfaces.

As shown in fig. 2, 3, and 4, the bobbin part 30 includes, for example, a pair of flanges 40, i.e., a 1 st flange 41 disposed on the front side and a 2 nd flange 42 disposed on the rear side.

The 1 st flange portion 41 and the 2 nd flange portion 42 extend from both ends of the tube portion 31 toward the outer periphery of the tube portion 31, for example.

More specifically, the 1 st flange portion 41 and the 2 nd flange portion 42 are each formed in a flat plate shape perpendicular to the axial direction of the tube portion 31, for example.

The front-rear dimension (thickness dimension) of the 1 st flange portion 41 is the same as the front-rear dimension (thickness dimension) of the 2 nd flange portion 42. The left-right dimension of the 1 st flange 41 is the same as the left-right dimension of the 2 nd flange 42, and the up-down dimension of the 1 st flange 41 is the same as the up-down dimension of the 2 nd flange 42.

The right end surface of the 1 st flange portion 41 and the right end surface of the 2 nd flange portion 42 are disposed on the same plane, and the left end surface of the 1 st flange portion 41 and the left end surface of the 2 nd flange portion 42 are disposed on the same plane.

As shown in fig. 2, 3 and 4, the body member 20 includes, as the terminal holding portion 50, a 1 st terminal holding portion 52 disposed on the front side and a 2 nd terminal holding portion 55 disposed on the rear side.

The 1 st terminal holding portion 52 and the 2 nd terminal holding portion 55 are formed in a shape of a flat prism, for example, long in the left-right direction and smaller in the front-rear dimension than in the up-down dimension.

The 1 st terminal holding portion 52 projects forward and in the left-right direction from the lower edge of the 1 st flange portion 41. The 2 nd terminal holding portion 55 projects rearward and rightward from the lower edge of the 2 nd flange portion 42.

In the present embodiment, the front-rear dimension of the 1 st terminal holding portion 52 is the same as the front-rear dimension of the 2 nd terminal holding portion 55. The 1 st terminal holding portion 52 has the same vertical dimension as the 2 nd terminal holding portion 55. The left-right dimension of the 1 st terminal holding portion 52 is the same as the left-right dimension of the 2 nd terminal holding portion 55. In addition, the height position of the lower end surface of the protruding portion 59 is the same as the height position of the lower end surface of the 1 st terminal holding portion 52.

However, the dimensional relationship between the 1 st terminal holding portion 52 and the 2 nd terminal holding portion 55 is not particularly limited, and the 1 st terminal holding portion 52 and the 2 nd terminal holding portion 55 may have different dimensions.

The 1 st terminal holding portion 52 and the 2 nd terminal holding portion 55 are each formed flat on the upper surface and horizontally arranged.

The 1 st terminal holding portion 52 and the 2 nd terminal holding portion 55 hold a plurality of terminal portions 60, which will be described later, respectively.

As shown in fig. 4 and 5, in the present embodiment, coil component 100 includes a plurality of (e.g., 8) terminal portions 60 electrically connected to coil 70.

For example, 4 terminal portions 60 (hereinafter, referred to as 1 st terminal portion 61) of the 8 terminal portions 60 are held by the 1 st terminal holding portion 52, and the remaining 4 terminal portions 60 (hereinafter, referred to as 2 nd terminal portions 62) are held by the 2 nd terminal holding portion 55.

The 1 st terminal portions 61 are arranged in the 1 st terminal holding portion 52 in the left-right direction. Similarly, the 2 nd terminal portions 62 are arranged in the 2 nd terminal holding portion 55 in the left-right direction.

Each terminal portion 60 is formed by bending an elongated bar-shaped (or plate-shaped) metal member, for example.

As shown in fig. 2 and 3, each 1 st terminal portion 61 has an upper portion (not shown) embedded in the 1 st terminal holding portion 52 and a lower portion exposed to the outside from each 1 st terminal holding portion 52. The exposed lower portion is an external terminal 65 to be externally connected when the coil component 100 is mounted.

More specifically, the 1 st terminal portion 61 is bent at an intermediate portion in the longitudinal direction thereof. The upper portion of the 1 st terminal portion 61 extends vertically, and the lower portion of the 1 st terminal portion 61 extends in the front-rear direction. The external terminal 65 of each 1 st terminal portion 61 protrudes downward from the bottom surface of the 1 st terminal holding portion 52 and extends forward.

For example, each of the 2 nd terminal portions 62 is formed in a shape symmetrical to each of the 1 st terminal portions 61 in the front-rear direction. Therefore, the 3 rd terminal portion 63 includes an upper portion (not shown) embedded in the 2 nd terminal holding portion 55 and external terminals 65 (lower portions) exposed to the outside from the 1 st terminal holding portion 52.

The length of each terminal portion 60 in the front-rear direction of the external terminal 65 is set to be, for example, the same length.

The thickness dimensions of the plate-like metal members constituting the terminal portions 60 are set to be the same as each other.

As shown in fig. 2 and 4, the coil component 100 has, for example, the 1 st coil and the 2 nd coil as the coil 70.

The 1 st coil and the 2 nd coil are each formed of a winding 71. Each winding 71 of the coil 70 is wound around the cylindrical portion 31 of the bobbin portion 30. The winding portion 72 is formed by the winding 71 wound around the cylindrical portion 31 (see fig. 2). Both ends of each winding 71 are electrically connected to the corresponding terminal portions 60. For example, both end portions of each winding 71 are drawn out from the winding portion 72 and wound around the corresponding terminal portion 60, and are electrically connected to the terminal portion 60. In addition, the portion of the winding 71 drawn out from the winding portion 72 and the winding portion of the winding 71 around the terminal portion 60 are not illustrated. The portion around which each coil 71 is wound may be a portion protruding from the terminal holding portion 50 in the terminal portion 60 (for example, a portion protruding from the terminal holding portion 50 differently from an L-shaped portion including the external terminal 65, a portion buried between the portion buried in the terminal portion 60 in the winding tube portion 30 and the external terminal 65), or a portion buried in the terminal portion 60 in the winding tube portion 30.

In each of the drawings, the end of the winding 71 wound around the terminal portion 60 and the portion extending from the winding portion 72 toward the terminal portion 60 are not shown.

As shown in fig. 1, 2, 6, and the like, the cover member 80 has a top surface portion 81 covering the upper side of the bobbin part 30, for example. More specifically, the cover member 80 includes a 1 st side wall portion 82a and a 2 nd side wall portion 82b extending downward from the peripheral edge portion 81a of the top surface portion 81.

The top surface portion 81 is formed in a flat plate shape, for example, and is horizontally arranged. As shown in fig. 4, the planar shape of the top surface portion 81 is, for example, substantially rectangular. The rear right portion of the top surface portion 81 is a cutout shape portion 81b with a corner portion partially cut out. The orientation of the cover member 80 can be easily determined by the notch-shaped portion 81 b.

Since the cover member 80 has the top surface 81, the top surface 81 can be sucked by the mounting device when the coil component 100 is mounted on the substrate, and the operation of mounting the coil component 100 on the substrate can be easily performed. The top surface 81 may be formed unevenly, for example.

The 1 st side wall portion 82a and the 2 nd side wall portion 82b are formed in flat plate shapes and are disposed vertically.

The 1 st side wall portion 82a extends downward from the lower surface of the front end portion of the top surface portion 81, for example, and the 2 nd side wall portion 82b extends downward from the lower surface of the rear end portion of the top surface portion 81, for example. As shown in fig. 5, for example, the 1 st side wall 82a and the 2 nd side wall 82b face each other in the left-right direction.

The right side surface of the 1 st side wall portion 82a is flush with the right side surface of the top surface portion 81, and the left side surface of the 2 nd side wall portion 82b is flush with the left side surface of the top surface portion 81.

The 1 st magnetic core 11a and the 2 nd magnetic core 11b are integrally molded in their entirety with a magnetic material.

The body member 20 (the bobbin portion 30 and the terminal holding portion 50) is integrally molded with an insulating material such as resin, for example, as a whole.

The cover member 80 is integrally molded with an insulating material such as resin.

In the case of the present embodiment, the cover member 80 is attached to the bobbin 30 so as to cover the upper end of the bobbin 30, for example. More specifically, as shown in fig. 3, 5, and the like, the top portion 81 covers the upper side of the spool 30, the 1 st side wall portion 82a covers the right side of the upper end of the spool 30, and the 2 nd side wall portion 82b covers the left side of the upper end of the spool 30.

As shown in fig. 6, the inner surface (lower surface) of the top surface portion 81 and the upper end surfaces of the 1 st flange portion 41 and the 2 nd flange portion 42, for example, are in surface contact with each other. However, the inner surface of the top surface portion 81 may face the upper end surface of the 1 st flange portion 41 and the upper end surface of the 2 nd flange portion 42 in a state close to each other.

As shown in fig. 4, the inner surface of the 1 st side wall portion 82a is preferably disposed parallel to the right side surface of the 1 st flange portion 41 and the right side surface of the 2 nd flange portion 42, respectively. Preferably, the inner surface of the 2 nd side wall portion 82b is disposed in parallel with the left side surface of the 1 st flange portion 41 and the left side surface of the 2 nd flange portion 42, respectively.

The insertion portion 15 of the 1 st core 11a is inserted into the insertion hole 36 through the opening in the front side of the insertion hole 36 of the bobbin portion 30 (see fig. 6). Similarly, the insertion portion 15 of the 2 nd core 11b is inserted into the through-insertion hole 36 through the opening on the rear side of the through-insertion hole 36 of the bobbin portion 30.

The distal end surface of the insertion portion 15 of the 1 st core 11a and the distal end surface of the insertion portion 15 of the 2 nd core 11b abut against each other inside the insertion hole 36. That is, the distal end surface of the insertion portion 15 of the 1 st core 11a and the distal end surface of the insertion portion 15 of the 2 nd core 11b are in surface contact with each other.

The 1 st magnetic core 11a and the 2 nd magnetic core 11b constitute a closed magnetic circuit.

As shown in fig. 6, coil 70 is wound around bobbin 30, and since insertion portion 15 is inserted through bobbin 30, coil 70 is wound around core 10.

As shown in fig. 3 and 4, left and right outer leg portions 13 of 1 st core 11a are disposed outside winding bobbin portion 30. The inner surface of the right outer leg 13 faces the right side surface of the 1 st flange 41 and the right side surface of the 2 nd flange 42, and the inner surface of the left outer leg 13 faces the left side surface of the 1 st flange 41 and the left side surface of the 2 nd flange 42. The base portion 12 of the 1 st magnetic core 11a is disposed on the front side of the winding tube portion 30, and the inner surface 12a of the base portion 12 faces the front surface of the 1 st flange portion 41.

More specifically, the left and right outer leg portions 13 of the 2 nd core 11b are disposed outside the winding tube portion 30. The inner surface of the right outer leg 13 faces the right side surface of the 1 st flange 41 and the right side surface of the 2 nd flange 42, and the inner surface of the left outer leg 13 faces the left side surface of the 1 st flange 41 and the left side surface of the 2 nd flange 42. The base portion 12 of the 2 nd magnetic core 11b is disposed on the rear side of the winding tube portion 30, and the inner surface 12a of the base portion 12 faces the rear surface of the 2 nd flange portion 42.

The front end surfaces of the right outer leg portions 13 of the 1 st magnetic core 11a and the front end surfaces of the right outer leg portions 13 of the 2 nd magnetic core 11b are butted against each other. That is, the front end surface of the right outer leg portion 13 of the 1 st magnetic core 11a and the front end surface of the right outer leg portion 13 of the 2 nd magnetic core 11b are in surface contact with each other. Similarly, the front end surface of the left outer leg 13 of the 1 st magnetic core 11a and the front end surface of the left outer leg 13 of the 2 nd magnetic core 11b abut against each other.

The lower surface of the insertion portion 15 is disposed along the inner circumferential bottom surface of the insertion hole 36.

Here, in the case of the present embodiment, the front end surface of the right outer leg portion 13 of the 1 st core 11a and the front end surface of the right outer leg portion 13 of the 2 nd core 11b are fixed to each other by the 1 st adhesive 91 (see fig. 3 and 4). Similarly, the end surface of the left outer leg 13 of the 1 st core 11a and the end surface of the left outer leg 13 of the 2 nd core 11b are fixed to each other by the 1 st adhesive 91 (see fig. 4 and 5). The 1 st core 11a and the 2 nd core 11b are integrally coupled to each other by the 1 st adhesive 91, and the mutual positional deviation of the 1 st core 11a and the 2 nd core 11b is suppressed. In addition, the core 10 can be prevented from falling off from the winding tube part 30.

As shown in fig. 3, the lower surfaces of the 1 st and 2 nd cores 11a and 11b are arranged on the same plane.

The base portion 12 of the 1 st magnetic core 11a is disposed above the 1 st terminal holding portion 52 and along the upper surface of the 1 st terminal holding portion 52 (see fig. 1 and 4).

The base portion 12 of the 2 nd core 11b is disposed above the 2 nd terminal holding portion 55 and along the upper surface of the 2 nd terminal holding portion 55 (see fig. 3 and 4). The lower surfaces of the 1 st core 11a and the 2 nd core 11b and the upper surfaces of the terminal holding portions 50 (the 1 st terminal holding portion 52 and the 2 nd terminal holding portion 55) may be in surface contact with each other or may be opposed to each other in a state of being close to each other.

As shown in fig. 3 and 7, in the present embodiment, the positioning projection 86 presses the outer arrangement portion of the 1 st magnetic core 11a toward the winding tube portion 30, the surface of the outer arrangement portion of the 1 st magnetic core 11a that faces the outer arrangement portion of the 2 nd magnetic core 11b (the inner surface 12a of the base portion 12 in the present embodiment) contacts the winding tube portion 30, and a gap 96 is formed between the surface of the outer arrangement portion of the 2 nd magnetic core 11b that faces the outer arrangement portion of the 1 st magnetic core 11a (the inner surface 12a of the base portion 12 of the 2 nd magnetic core 11b in the present embodiment) and the winding tube portion 30.

Thus, even if the magnetic core 10 expands and contracts due to the heating of the magnetic core 10 during use of the coil component 100 or the like, the expansion and contraction of the magnetic core 10 can be allowed through the gap 96 between the inner surface 12a of the 2 nd magnetic core 11b and the bobbin part 30. Therefore, stress application to the magnetic core 10 can be suppressed.

Further, by maintaining the positional relationship between the magnetic core 10 and the winding tube part 30 well, the positional relationship between the magnetic core 10 and the coil 70 can also be maintained well, and therefore, more stable characteristics of the coil component 100 can be realized.

More specifically, in the present embodiment, the cover member 80 further includes a lower extending portion 84 (see fig. 1, 3, and the like) extending downward from the peripheral edge portion 81a of the top surface portion 81, and a positioning protrusion 86 is formed at a lower end portion of the lower extending portion 84.

More specifically, as shown in fig. 8 (a) and 8 (c), the lower extension 84 includes, for example: a main portion 85 extending downward from the lower surface of the front end portion of the peripheral portion 81 a; and a positioning projection 86 extending downward from the lower end of the main portion 85.

The main portion 85 is formed in a substantially rectangular parallelepiped shape elongated vertically, for example. The rear end surface of the main portion 85 is disposed rearward of the rear end surface of the top surface portion 81, while the front end surface of the main portion 85 is disposed forward of the front end surface of the top surface portion 81. More specifically, a part of the main portion 85 protrudes forward from the front end surface of the peripheral edge portion 81a, and the part protrudes to the same height position as the upper surface of the top surface portion 81 (the upper surface of the part is arranged on the same plane as the upper surface of the top surface portion 81).

As shown in fig. 8 (a), 8 (b), and 8 (c), the positioning protrusion 86 is, for example, a vertically long protrusion piece, and has a front surface, a rear surface, and left and right end surfaces.

In the present embodiment, a part of the lower surface of the main portion 85 is a non-formation region of the positioning protrusion 86, and a stepped surface 84a is formed by the lower end of the main portion 85 and the upper end of the positioning protrusion 86.

More specifically, the front surface of the positioning projection 86 and the front surface of the main portion 85 are arranged on the same plane. On the other hand, the rear surface of the positioning projection 86 is disposed rearward of the rear surface of the main portion 85, and the stepped surface 84a is disposed over the entire upper end of the rear surface of the positioning projection 86 and the lower end of the rear surface of the downward extending portion 84. The step surface 84a is formed flat and arranged horizontally. The step surface 84a is in surface contact with the upper surface of the base 12 of the 1 st magnetic core 11 a. This can suppress vertical wobbling of the 1 st core 11a (or the 2 nd core 11 b).

The right side surface of the positioning projection 86 is flush with the right side surface of the main portion 85, and the left side surface of the positioning projection 86 is flush with the left side surface of the main portion 85.

As shown in fig. 6, in the positioning protrusion 86, a surface facing the outer arrangement portion of the 1 st magnetic core 11a (in the present embodiment, a rear end surface of the positioning protrusion 86) has, for example, an inclined surface 86a that is inclined upward and in a direction approaching the outer arrangement portion.

When the cover member 80 is attached to the bobbin part 30, the positioning projection 86 and the main part 85 are guided downward along the inclined surface 86 a.

More specifically, the rear surface of the positioning protrusion 86 includes, for example, an inclined surface 86a and a flat surface 86b that is formed flat and is disposed vertically. The upper edge of the flat surface 86b is connected to the lower surface of the main portion 85, for example, and the lower edge of the flat surface 86b is connected to the upper edge of the inclined surface 86 a.

The flat surface 86b is perpendicular to the front-rear direction, for example.

As shown in fig. 6, in the case of the present embodiment, the flat surface 86b of the positioning protrusion 86 is in surface contact with the outer surface 12b of the base portion 12 of the 1 st magnetic core 11 a. The lower end surface of the positioning protrusion 86 is located below the upper surface of the 1 st core 11a and above the lower surface of the 1 st core 11 a.

The positioning projection 86 may be a spring piece that restricts the outer arrangement portion from moving away from the winding tube portion 30 in the axial direction of the insertion hole 36 by an elastic force (spring force), for example.

Here, as shown in fig. 3 and 7, the winding tube part 30 has, for example, a pair of front and rear side surfaces, that is, a 1 st side surface 41a disposed on the front side and a 2 nd side surface 42a disposed on the rear side.

In the present embodiment, the positioning projection 86 presses the outer surface 12b of the base portion 12 of the 1 st magnetic core 11a toward the 1 st side surface 41a in the axial direction (front-rear direction) of the insertion hole 36, and the inner surface 12a of the base portion 12 of the 1 st magnetic core 11a contacts the 1 st side surface 41 a. In addition, a gap 96 is formed between the inner surface 12a of the base 12 of the 2 nd magnetic core 11b and the 2 nd side surface 42 a.

The 1 st side surface 41a is, for example, a front surface of the 1 st flange portion 41, and the 2 nd side surface 42a is, for example, a rear surface of the 2 nd flange portion 42. The 1 st side surface 41a and the 2 nd side surface 42a are formed flat, respectively, and are perpendicular to the front-rear direction.

The flat surface 86b of the positioning protrusion 86 faces the 1 st side surface 41a in the front-rear direction with the 1 st core 11a disposed outside. The flat surface 86b is in surface contact with the outer surface 12b of the base 12 of the 1 st magnetic core 11 a. The 1 st side surface 41a of the winding tube part 30 is in surface contact or point contact with the inner surface 12a of the base 12 of the 1 st magnetic core 11 a. In this way, the base portion 12 of the 1 st magnetic core 11a is sandwiched between the positioning protrusion 86 and the 1 st side surface 41a in the axial direction (front-rear direction) of the insertion hole 36. This can prevent the magnetic core 10 from being displaced relative to the winding tube part 30 and the cover member 80 in the front-rear direction. That is, since the gap 96 between the inner surface 12a of the 2 nd core 11b and the 2 nd side surface 42a can be maintained satisfactorily, the stress between the core 10 and the winding tube part 30 can be absorbed more reliably by the gap 96.

In the present embodiment, the cover member 80 includes the 2 nd downward extending portion 87 extending downward from the peripheral edge portion 81a of the top surface portion 81, and the 2 nd downward extending portion 87 includes the engaging claw 88. As shown in fig. 7, the engaging claw 88 engages with the bobbin part 30.

This can maintain the cover member 80 in a good state attached to the bobbin 30. In the present embodiment, the magnetic core 10 is inserted into the winding tube part 30 in a state of being positioned with respect to the winding tube part 30 by the cover member 80. Therefore, the positional relationship between the core 10 and the winding tube part 30 can be maintained well by maintaining the positional relationship between the winding tube part 30 and the cover member 80 well, and therefore the gap 96 between the inner surface 12a of the 2 nd core 11b and the winding tube part 30 can be maintained well. In addition, since the positional relationship between the magnetic core 10 and the coil 70 is also maintained well, more stable characteristics of the coil component 100 can be realized.

More specifically, the cover member 80 includes: a 2 nd lower extending portion 87a (see fig. 7) disposed on the same side as the lower extending portion 84 with respect to the winding tube part 30; and a 2 nd lower extending portion 87b (see fig. 6) disposed on the opposite side of the lower extending portion 84 with respect to the winding tube part 30. In the present embodiment, the 2 nd lower extending portion 87a is disposed on the front side, and the 2 nd lower extending portion 87b is disposed on the rear side.

As shown in fig. 8 (b) and 8 (c), the 2 nd downward extending portion 87a extends downward from the front edge portion of the lower surface of the top surface portion 81. The 2 nd lower extending portion 87a engages with the 1 st flange 41 of the spool part 30, for example.

The 2 nd downward extending portion 87b extends downward from the rear edge portion of the lower surface of the top surface portion 81. The 2 nd lower extending portion 87a engages with the 2 nd flange 42 of the bobbin part 30, for example.

According to such a configuration, since both the front 2 nd downward extending portion 87a and the rear 2 nd downward extending portion 87b are engaged with the bobbin part 30 by the engaging structure, the relative displacement of the cover member 80 with respect to the bobbin part 30 can be restricted in the front-rear direction. Further, relative displacement of the cover member 80 with respect to the magnetic core 10 can also be restricted in the front-rear direction. Therefore, the positional displacement of the positioning projection 86 with respect to the 1 st core 11a can also be suppressed in the front-rear direction.

As shown in fig. 8a, 8 c, and the like, the cover member 80 includes a pair of 2 nd downward extending portions 87 (in the present embodiment, the 2 nd downward extending portion 87a disposed on the front side) that sandwich the downward extending portion 84.

More specifically, the 2 nd lower extending portion 87a is formed on the right and left sides of the front edge portion of the top surface portion 81, respectively, for example, in the left-right direction so as to sandwich the lower extending portion 84. In other words, the lower extending portion 84 is disposed between the 2 nd lower extending portion 87a on the right side and the 2 nd lower extending portion 87a on the left side.

In this way, the 2 nd lower extending portions 87a are formed in parallel with each other in the left-right direction, and the relative displacement of the cover member 80 with respect to the winding pipe portion 30 about the Z axis can be restricted. Further, since various relative displacements of the downward extending portion 84 about the Z axis with respect to the core 10 can be restricted, the positioning protrusion 86 can be maintained in a state in which the 1 st core 11a is pressed toward the winding tube part 30.

The pair of 2 nd downward extending portions 87a have flat plate portions formed in a flat plate shape, for example, and the plate surfaces of the flat plate portions face in the front-rear direction. The distal end surfaces of the flat plate portions of the pair of 2 nd downward extending portions 87a are arranged on the same plane as the distal end surface of the top surface portion 81, for example.

As shown in fig. 7 and 8 (c), the engaging claws 88 of the pair of 2 nd downward extending portions 87a project from the rear end surface of the flat plate portion toward the spool portion 30 (rearward), for example. The upper surface of the engagement claw 88 is formed flat and arranged horizontally. On the other hand, a part of the lower end of the engaging claw 88 has a chamfered shape. Further, the front end surface 88a (front end in the protruding direction) of the engagement claw 88 is formed flat and arranged vertically.

As shown in fig. 8 (a) and 8 (c), the top surface portion 81 is formed with a pair of left and right first slit portions 89a that penetrate the top surface portion 81 in the vertical direction. The pair of first slit portions 89a extend substantially linearly in the left-right direction. The right 1 st slit portion 89a is adjacent to the flat plate portion of the right 2 nd downward extending portion 87a in the front-rear direction, and is disposed on the rear side of the flat plate portion. Similarly, the left 1 st slit portion 89a is adjacent to the flat plate portion of the left 2 nd downward extending portion 87a in the front-rear direction, and is disposed at a position rearward of the flat plate portion.

As shown in fig. 8 c, in the present embodiment, the cover member 80 includes a pair of right and left 2 nd downward extending portions 87b (in the present embodiment, the 2 nd downward extending portion 87b disposed on the rear side).

This can more reliably restrict the relative displacement of the cover member 80 with respect to the bobbin part 30 about the Z axis.

More specifically, the pair of 2 nd lower extending portions 87b are formed in a front-rear symmetrical shape with respect to the pair of 2 nd lower extending portions 87a, for example. That is, the pair of 2 nd downward extending portions 87b each have a flat plate portion and an engaging claw 88 projecting forward from a front end surface of the flat plate portion. The rear end surfaces of the flat plate portions of the pair of 2 nd downward extending portions 87b are arranged on the same plane as the rear end surface of the top surface portion 81.

As shown in fig. 8 (a) and 8 (c), the top surface portion 81 is formed with a 2 nd slit portion 89b penetrating the top surface portion 81 in the vertical direction. The 2 nd slit portion 89b extends substantially linearly in the left-right direction. The 2 nd slit portion 89b is adjacent to the flat plate portions of the pair of 2 nd downward extending portions 87b in the front-rear direction, and is disposed on the front side of the flat plate portions.

Here, as shown in fig. 2, 5, 6, and 7, a pair of left and right engaged portions 48 that engage with the 2 nd downward extending portion 87a and a pair of left and right protruding portions 46 that are connected to the engaged portions 48 are formed on the 1 st side surface 41a (the front surface of the 1 st flange portion 41), respectively.

The pair of left and right engaged portions 48 are formed on the front and rear portions of the 1 st side surface 41a, respectively, so as to sandwich the insertion hole 36 in the left-right direction, for example. The pair of left and right engaged portions 48 is formed, for example, at the upper end portion of the 1 st side surface 41a and is disposed above the opening on the front side of the insertion hole 36.

Each engaged portion 48 projects forward from the 1 st side surface 41a, for example. More specifically, each engaged portion 48 includes a tapered portion whose amount of protrusion increases in a tapered manner downward, and a flat portion that is formed flat and is disposed vertically.

The lower edge of each cone portion is connected with the upper edge of the corresponding flat portion. The lower surface of the flat portion is formed flat and arranged horizontally, for example. The front side surface of the flat portion is, for example, perpendicular to the axial direction (front-rear direction) of the insertion hole 36.

The pair of left and right protrusions 46 protrude forward from the 1 st side surface 41a, for example. More specifically, as shown in fig. 3 and 5, each of the protrusions 46 extends substantially linearly in the vertical direction. The front end surface (front end in the protruding direction) of each protrusion 46 is formed flat and is disposed vertically.

As shown in fig. 5, the rear end surface of the right protrusion 46 is connected to the right engaged portion 48, and the front end surface of the left protrusion 46 is connected to the left engaged portion 48.

As shown in fig. 5, the engaging claws 88 of the 2 nd downward extending portion 87a engage with the engaged portions 48. When the cover member 80 is inserted into the bobbin part 30, the pair of 2 nd lower extending portions 87a are guided toward the flat portions of the engaged portions 48 along the tapered portions of the corresponding engaged portions 48.

The projection length (front-rear dimension) of the flat portion of the engaged portion 48 is set to a dimension slightly smaller than the projection length (front-rear dimension) of the engaging claw 88, for example. The height position of the lower surface of the flat portion of the engaged portion 48 is set to be substantially the same as the height position of the upper surface of the engaging claw 88 in the vertical direction. The lower surface of the flat portion of the engaged portion 48 is in surface contact with the upper surface of the engaging claw 88. The front end surface 88a of the engagement claw 88 is in surface contact with the 1 st side surface 41 a. In the front-rear direction, the front end surface of the flat portion of the engaged portion 48 faces a part of the rear end surface of the flat plate portion of the 2 nd downward extending portion 87 a.

As shown in fig. 3, the projection length (front-rear dimension) of each projecting portion 46 is set to be larger than the projection length of the flat portion of each engaged portion 48, for example. The vertical dimension of each projecting portion 46 is set to be the same as the vertical dimension of each engaged portion 48. As shown in fig. 5, the left side surface of the right protrusion 46 and the right side surface of the right 2 nd downward extending portion 87a face each other in the left-right direction. This can restrict the movement of the 2 nd downward extending portion 87a on the right side in the left-right direction to the right side of the corresponding protrusion 46. Similarly, the right side surface of the left protrusion 46 and the left side surface of the left 2 nd downward extending portion 87a face each other in the left-right direction. This can restrict the movement of the 2 nd downward extending portion 87a on the left side in the left-right direction to the left side of the corresponding protrusion 46. That is, the engagement of the engagement claws 88 with the engaged portion 48 can be maintained satisfactorily.

As shown in fig. 6, in the case of the present embodiment, the distance separating the front end surface 88a of the engaging pawl 88 of the 2 nd downward extending portion 87a from the flat surface 86b of the positioning protrusion 86 in the front-rear direction is set to be substantially the same as the front-rear dimension of the base 12. Thus, the positioning protrusion 86 can be configured to press the inner surface 12a of the base 12 of the 1 st core 11a toward the 1 st side surface 41a by engaging the engaging claws 88 with the corresponding engaged portions 48.

Similarly, as shown in fig. 2, 5, 6, and 7, a pair of left and right engaged portions 48 that engage with the 2 nd downward extending portion 87b and a pair of left and right protruding portions 46 that are connected to the engaged portions 48 are formed on the 2 nd side surface 42a (the rear side surface of the 2 nd flange portion 42), respectively.

The engaged portions 48 on the 2 nd side surface 42a side are formed in a shape substantially symmetrical to the engaged portions 48 on the 1 st side surface 41a side, for example. Therefore, the engaged portions 48 on the 2 nd side surface 42a side project rearward from the 2 nd side surface 42a, and the engaged portions 48 include tapered portions and flat portions.

As shown in fig. 5, the engaging claws 88 of the 2 nd downward extending portion 87b are engaged with the engaged portions 48. When the cover member 80 is inserted into the bobbin part 30, the pair of 2 nd lower extending portions 87b are guided toward the flat portions of the engaged portions 48 along the tapered portions of the corresponding engaged portions 48. The lower surface of the flat portion of the engaged portion 48 is in surface contact with the upper surface of the engaging claw 88. The distal end surface 88a of the engagement claw 88 is in surface contact with the 2 nd side surface 42 a.

As shown in fig. 4, the left side surface of the right protrusion 46 and the right side surface of the right 2 nd downward extending portion 87b face each other in the left-right direction. This can restrict the movement of the 2 nd downward extending portion 87b on the right side in the left-right direction to the right side of the corresponding protrusion 46. Similarly, the right side surface of the left protrusion 46 and the left side surface of the left 2 nd downward extending portion 87b face each other in the left-right direction. This can restrict the movement of the 2 nd downward extending portion 87b on the left side in the left-right direction to the left side of the corresponding protrusion 46. That is, the engagement of the engagement claws 88 with the engaged portion 48 can be maintained satisfactorily.

In the case of the present embodiment, as shown in fig. 3 and 5, coil component 100 includes 2 nd adhesive 92 applied to the upper surface of 1 st core 11 a. The 1 st magnetic core 11a (or even the 2 nd magnetic core 11b) is fixed to the cover member 80 and the winding tube part 30 by the 2 nd adhesive 92.

As shown in fig. 1, the 2 nd adhesive 92 is applied substantially linearly in the left-right direction along the upper surface of the base portion 12 of the 1 st magnetic core 11a and the 1 st side surface 41 a. The 2 nd adhesive 92 includes, for example, a part of the engagement claws 88 of the pair of 2 nd downward extending portions 87a and a part of the lower end portion of the downward extending portion 84. Therefore, the state in which the engagement claws 88 are engaged with the corresponding engaged portions 48 can be maintained well, and the relative displacement of the lower extending portion 84 (or the positioning protrusion 86) with respect to the 1 st core 11a can be suppressed.

Similarly, as shown in fig. 5 and 6, coil component 100 includes buffer material 94 coated on the upper surface of 2 nd magnetic core 11 b. The 2 nd magnetic core 11b (or even the 1 st magnetic core 11a) is fixed to the cover member 80 and the winding tube part 30 by the buffer material 94.

The cushion material 94 is applied substantially linearly in the left-right direction along the upper surface of the base portion 12 of the 2 nd magnetic core 11b and the 2 nd side surface 42 a. The buffer material 94 encloses a part of the engaging claws 88 of the pair of 2 nd downward extending portions 87b, for example. Further, a part of the cushioning material 94 may enter a gap 96 between the 2 nd side surface 42a and the inner surface 12a of the 2 nd magnetic core 11b, for example.

In the case of the present embodiment, the 2 nd adhesive 92 is configured to include, for example, a hard resin material. This allows the 1 st magnetic core 11a to be fixed to the cover member 80 and the winding bobbin 30 satisfactorily.

On the other hand, the cushion material 94 is configured to include a soft resin material, for example. Thus, even if vibration is applied to the coil member 100, the vibration can be absorbed well by the cushion material 94. That is, the structural strength of the coil component 100 can be improved.

The coil component 100 of the present embodiment is configured as described above. For example, such a coil component 100 can be used as a high-voltage pulse transformer. However, the use of the coil component 100 is not limited to this example.

The coil component 100 can be assembled as follows, for example.

First, the respective coils 71 of the coils 70 (the 1 st coil 70a and the 2 nd coil 70b) are wound around the cylindrical portion 31 of the bobbin portion 30. The end of each coil 71 is wound around the winding terminal 66 of the corresponding terminal portion 60 and fixed by welding or soldering.

Next, the insertion portion 15 of the 1 st core 11a is inserted into the insertion hole 36 from the opening on the front side of the insertion hole 36, while the insertion portion 15 of the 2 nd core 11b is inserted into the insertion hole 36 from the opening on the rear side of the insertion hole 36.

Next, the cover member 80 is covered over the winding tube part 30. At this time, for example, the engaging claws 88 of the 2 nd downward extending portion 87 are first arranged along the tapered portions of the corresponding engaged portions 48, and the lower surfaces or the distal end surfaces of the engaging claws 88 are arranged in contact with the upper end portions of the flat portions of the engaged portions 48. The inclined surface 86a of the positioning protrusion 86 is disposed in point contact or line contact with the base 12 of the 1 st magnetic core 11 a. Then, the cover member 80 is pushed downward with respect to the main body member 20 until the engagement claws 88 of the 2 nd downward extending portions 87 are engaged with the corresponding engaged portions 48. At this time, the engaging claws 88 of the 2 nd downward extending portion 87 slide downward along the inclined surfaces of the tapered portions of the corresponding engaged portions 48, and reach the lower surfaces of the flat portions of the engaged portions 48. Further, the base portion 12 of the 1 st magnetic core 11a slides toward the winding tube portion 30 along the inclined surface 86a of the positioning protrusion 86, and the inner surface 12a of the base portion 12 comes into surface contact or line contact with the 1 st side surface 41 a. In this state, the flat surface 86b is in surface contact with the outer surface 12b of the base 12.

Thus, the cover member 80 is externally inserted into the spool part 30.

Next, the 1 st core 11a and the 2 nd core 11b are fixed to each other by the 1 st adhesive 91, and the core 10 is fixed to the winding tube part 30 and the cover member 80 by the 2 nd adhesive 92 and the buffer material 94, respectively.

Here, as described above, the positioning projection 86 is disposed along the outer surface of the outer disposed portion (the outer surface 12b of the base portion 12), and restricts the outer disposed portion from moving away from the wire winding tube portion 30 in the axial direction of the insertion hole 36. Therefore, for example, the positional relationship between the 1 st magnetic core 11a and the 2 nd magnetic core 11b and the desired positional relationship between the magnetic core 10 and the winding tube part 30 can be easily achieved without using a dedicated jig. That is, the fixation of the 1 st and 2 nd magnetic cores 11a, 11b and the fixation of the magnetic core 10 to each of the winding tube part 30 and the cover member 80 can be performed without being interfered by the jig. Therefore, the ease of manufacturing coil component 100 can be improved.

Thus, coil component 100 can be obtained.

< modification example >

Next, a modification will be described with reference to fig. 9 to 11 (c).

The coil component 100 of the present modification differs from the coil component 100 of the above embodiment in the aspects described below, and is configured in the same manner as the coil component 100 of the above embodiment in other aspects.

In the embodiment, the example in which the positioning protrusion 86 has the inclined surface 86a is described, but in the case of the present invention, as shown in fig. 9 to 11 (c), the positioning protrusion 86 does not have the inclined surface 86a as an example, and the flat surface 86b arranged vertically constitutes the rear end surface of the positioning protrusion 86.

The flat surface 86b is in surface contact with the outer surface 12b of the 1 st magnetic core 11 a.

The front-rear dimension of the positioning projection 86 is substantially constant regardless of, for example, the position in the vertical direction.

According to such a structure, the positioning projection 86 also restricts the outer arrangement portion from moving away from the bobbin portion 30 in the axial direction of the insertion hole 36. Therefore, a desired positional relationship between the bobbin part 30 and the core 10 can be easily achieved.

While the embodiments have been described above with reference to the drawings, these are illustrative of the present invention, and various configurations other than the above-described configurations can be adopted.

For example, in the above description, an example has been described in which the positioning projection 86 is disposed along the outer surface of the outer disposed portion to restrict the outer disposed portion from moving away from the wire-winding tube portion 30 in the axial direction of the insertion hole 36. However, in the present invention, for example, as shown in fig. 12, the positioning projection 86 may be disposed between the inner surface of the outer disposed portion and the wire winding tube portion 30 to restrict the outer disposed portion from approaching the wire winding tube portion 30 in the axial direction of the insertion hole 36. In this case, the positioning projection 86 is, for example, a plate spring that elastically biases the outer arrangement portion of the 1 st core 11a in the axial direction of the insertion hole 36 to the side opposite to the winding tube portion 30 side. However, the positioning projection 86 may be a spacer inserted between the inner surface of the outer arrangement portion and the winding tube portion 30.

The present invention is not limited to the above-described configuration in which the cover member 80 includes the positioning projection 86, and the spool part 30 may include the positioning projection 86. In this case, the positioning projection 86 is provided, for example, on the terminal holding portion 50 or the flange portion 40 of the winding wire tube portion 30, and is disposed between the inner surface of the outer disposition portion and the winding wire tube portion 30 to restrict the outer disposition portion from approaching the winding wire tube portion 30 in the axial direction of the insertion hole 36. More specifically, the positioning projection 86 is, for example, a plate spring that elastically biases the outer arrangement portion of the 1 st magnetic core 11a in the axial direction of the insertion hole 36 toward the opposite side from the winding tube portion 30.

With this configuration, a desired positional relationship between the magnetic core 10 and the bobbin part 30 can be achieved.

In the above description, the example in which the core 10 is configured to have 2E cores has been described, but the present invention is not limited to this example, and the core 10 may be configured to have an E core and an I core.

Further, the core 10 may be configured to have 2T-shaped cores, or a T-shaped core and an I-shaped core. In this case, the overall shape of the core 10 is H-shaped in plan view.

In the above description, an example in which the core 10 has 2 members (the 1 st core 11a and the 2 nd core 11b) has been described, but the core 10 may be integrated as a whole, or may be configured to have 3 or more members.

The present embodiment includes the following technical ideas.

(1) A coil component includes: a bobbin part having a through insertion hole; a magnetic core having an insertion portion inserted into the insertion hole and an outer arrangement portion arranged outside the winding tube portion; a coil wound around the bobbin; and a cover member that covers an upper portion of the bobbin, the cover member having a positioning projection that positions the magnetic core, the positioning projection being disposed along an outer surface of the outer disposition portion, the outer disposition portion being restricted from moving away from the bobbin in an axial direction of the insertion hole, or being disposed between an inner surface of the outer disposition portion and the bobbin, the outer disposition portion being restricted from moving closer to the bobbin in the axial direction of the insertion hole.

(2) The coil component according to (1), wherein the positioning protrusion presses an outer surface of the outer arrangement portion in a direction in which the outer arrangement portion approaches the winding tube portion in an axial direction of the through insertion hole.

(3) The coil component according to (2), wherein the magnetic cores include a 1 st magnetic core and a 2 nd magnetic core that are arranged to face each other and combined with each other, at least one of the 1 st magnetic core and the 2 nd magnetic core has the insertion portion, both the 1 st magnetic core and the 2 nd magnetic core have the outer arrangement portion, the positioning protrusion portion presses the outer arrangement portion of the 1 st magnetic core to the side of the winding tube portion, a surface of the outer arrangement portion of the 1 st magnetic core that faces the outer arrangement portion of the 2 nd magnetic core is in contact with the winding tube portion, and a gap is formed between a surface of the outer arrangement portion of the 2 nd magnetic core that faces the outer arrangement portion of the 1 st magnetic core and the winding tube portion.

(4) The coil component according to (2) or (3), wherein the cover part has: a top surface portion covering an upper portion of the bobbin portion; and a downward extending portion extending downward from a peripheral edge portion of the top surface portion, the positioning protrusion being formed at a lower end portion of the downward extending portion.

(5) The coil component according to (4), wherein a surface of the positioning protrusion facing the outer arrangement portion of the 1 st magnetic core has an inclined surface inclined upward and in a direction approaching the outer arrangement portion.

(6) The coil component according to (4) or (5), wherein the cover member has a 2 nd downward extending portion extending downward from a peripheral edge portion of the top surface portion, and the 2 nd downward extending portion has an engaging claw that engages with the bobbin portion.

(7) The coil component according to (6), wherein the cover component has a pair of the 2 nd lower extensions sandwiching the lower extension.

(8) The coil component according to (6) or (7), wherein the cover component has: the 2 nd lower extension portion disposed on the same side as the lower extension portion with reference to the bobbin portion; and the 2 nd lower extension portion disposed on the opposite side of the lower extension portion with respect to the bobbin portion.

(9) A coil component having: a bobbin part having a through insertion hole; a magnetic core having an insertion portion inserted into the insertion hole and an outer arrangement portion arranged outside the bobbin portion; a coil wound around the bobbin; and a cover member that covers an upper portion of the bobbin portion, the bobbin portion having a positioning projection portion that positions the magnetic core, the positioning projection portion being disposed between an inner surface of the outer arrangement portion and the bobbin portion, and restricting the outer arrangement portion from approaching the bobbin portion in an axial direction of the insertion hole.

Claims (8)

1. A coil component having:

a bobbin part having a through insertion hole;

a magnetic core having an insertion portion inserted into the insertion hole and an outer arrangement portion arranged outside the bobbin portion;

a coil wound around the bobbin; and

a cover member covering an upper portion of the bobbin part,

the cover member has a positioning projection for positioning the magnetic core,

the positioning protrusion is disposed along an outer surface of the outer arrangement portion, and restricts the outer arrangement portion from moving away from the bobbin portion in the axial direction of the through-insertion hole, or is disposed between an inner surface of the outer arrangement portion and the bobbin portion, and restricts the outer arrangement portion from moving closer to the bobbin portion in the axial direction of the through-insertion hole.

2. The coil component of claim 1,

the positioning protrusion presses an outer surface of the outer arrangement portion in a direction in which the outer arrangement portion approaches the bobbin portion in an axial direction of the through insertion hole.

3. The coil component of claim 2, wherein,

the magnetic cores include a 1 st magnetic core and a 2 nd magnetic core which are arranged opposite to each other and combined with each other,

at least one of the 1 st magnetic core and the 2 nd magnetic core has the insertion portion,

both the 1 st magnetic core and the 2 nd magnetic core have the outer arrangement portion,

the positioning protrusion presses the outer arrangement portion of the 1 st magnetic core toward the winding tube portion,

a surface of the outer arrangement portion of the 1 st magnetic core facing the outer arrangement portion of the 2 nd magnetic core is in contact with the winding tube portion,

a gap is formed between a surface of the outer arrangement portion of the 2 nd core, which is opposed to the outer arrangement portion of the 1 st core, and the bobbin portion.

4. The coil component of claim 2 or 3,

the cover member has:

a top surface portion covering an upper portion of the bobbin portion; and

a downward extending portion extending downward from a peripheral edge portion of the top surface portion,

the positioning protrusion is formed at a lower end of the lower extension.

5. The coil component of claim 4, wherein,

in the positioning protrusion, a surface facing the outer arrangement portion of the 1 st magnetic core has an inclined surface inclined upward and toward the outer arrangement portion.

6. The coil component of claim 4 or 5, wherein,

the cover member has a 2 nd downward extending portion extending downward from a peripheral edge portion of the top surface portion,

the 2 nd lower extension part is provided with a clamping claw,

the clamping claw is clamped with the winding tube part.

7. The coil component of claim 6,

the cover member has a pair of the 2 nd lower extensions sandwiching the lower extension.

8. The coil component of claim 6 or 7,

the cover member has:

the 2 nd lower extension part disposed on the same side as the lower extension part with reference to the bobbin part; and

and a 2 nd lower extension portion disposed on the opposite side of the lower extension portion with respect to the bobbin portion.

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