CN114255972A

CN114255972A - Coil device

Info

Publication number: CN114255972A
Application number: CN202110307606.XA
Authority: CN
Inventors: 浦野圣; 近藤润二; 文桂君; 潘小露
Original assignee: Tamura Corp Of China Ltd; Tamura Corp
Current assignee: Tamura Corp Of China Ltd; Tamura Corp
Priority date: 2020-09-24
Filing date: 2021-03-23
Publication date: 2022-03-29
Also published as: JP2022053504A

Abstract

The present invention provides a coil device, including: a core body that is a laminated core body in which a plurality of plate-shaped core bodies are laminated, and that has a first laminated core body and a second laminated core body butted against each other; and a fixing fitting for fixing the core to the substrate. The fixing fitting has: a base on which the core is placed; and a first portion formed in a shape standing upright relative to the base by bending a portion of the metal plate forming the base, the first portion being close to a butt portion between the first laminated core and the second laminated core and having a width in a direction orthogonal to a standing direction standing upright relative to the base and in a stacking direction of the plate-shaped cores included in each of the laminated cores. In this coil device, the first portion, the first laminated core, and the second laminated core are joined together by co-welding the first portion and the butt portion. The center of curvature of a curved shape formed by bending a portion of the metal plate is located on the opposite side of the core from the first portion.

Description

Coil device

Technical Field

The present invention relates to a coil device.

Background

Coil devices such as reactors are incorporated in household appliances such as washing machines and refrigerators. For example, japanese patent application laid-open No. 2002-93643 (hereinafter referred to as "patent document 1") discloses a specific structure of such a coil device.

In patent document 1, 2 core members are joined by welding, thereby forming 1 core. A fixing member for fixing the core to the substrate is joined to the manufactured core by welding.

Disclosure of Invention

In patent document 1, since it is necessary to weld a fixing member to the core after welding of the core members, there is a problem that the number of welding steps is large.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a coil device which can be manufactured with fewer welding steps.

A coil device according to an embodiment of the present invention includes: a core body that is a laminated core body in which a plurality of plate-shaped core bodies are laminated, and that has a first laminated core body and a second laminated core body butted against each other; and a fixing fitting for fixing the core to the substrate. The fixing fitting has: a base on which the core is placed; and a first portion formed in a shape standing upright relative to the base by bending a portion of the metal plate forming the base, the first portion being close to a butt portion of the first laminated core and the second laminated core, and having a width in a direction orthogonal to a standing direction standing upright relative to the base and in a stacking direction of the plate-shaped cores included in the respective laminated cores. In this coil device, the first portion, the first laminated core, and the second laminated core are joined together by co-welding the first portion and the butt portion. Further, a center of curvature of a curved shape formed by bending a part of the metal plate is located on the opposite side of the core from the first portion.

In the coil device configured as described above, the first portion, the first laminated core, and the second laminated core can be joined together by one welding. Therefore, the coil device can be manufactured with less welding man-hours than the conventional one.

A coil device according to an embodiment of the present invention includes: a core body that is a laminated core body in which a plurality of plate-shaped core bodies are laminated, and that has a first laminated core body and a second laminated core body butted against each other; and a fixing fitting for fixing the core to the substrate. The fixing fitting has: a base on which the core is placed; and a first portion formed in a shape standing upright relative to the base by bending a portion of the metal plate forming the base, the first portion being close to a butt portion of the first laminated core and the second laminated core, and having a width in a direction orthogonal to a standing direction standing upright relative to the base and in a stacking direction of the plate-shaped cores included in the respective laminated cores. In this coil device, the first portion, the first laminated core, and the second laminated core are joined together by co-welding the first portion and the butt portion. Further, the metal plate is formed with a slit penetrating the metal plate and conforming to the first portion, and the first portion is formed in a shape standing upright with respect to the base portion by bending a portion continuous with the base portion among the portion conforming to the first portion by the slit.

A coil device according to an embodiment of the present invention includes: a core body that is a laminated core body in which a plurality of plate-shaped core bodies are laminated, and that has a first laminated core body and a second laminated core body butted against each other; and a fixing fitting for fixing the core to the substrate. The fixing fitting has: a base on which the core is placed; and a first portion formed in a shape standing upright relative to the base by bending a portion of the metal plate forming the base, the first portion being close to a butt portion of the first laminated core and the second laminated core, and having a width in a direction orthogonal to a standing direction standing upright relative to the base and in a stacking direction of the plate-shaped cores included in the respective laminated cores. In this coil device, the first portion, the first laminated core, and the second laminated core are joined together by co-welding the first portion and the butt portion. The first portion stands at an angle inclined with respect to the base portion so that at least a part of the first portion is close to the mating portion.

In one embodiment of the present invention, the first laminated core and the second laminated core may have first end faces and second end faces formed by aligning end faces of the plate-shaped cores, respectively, and the width of the first portion in the laminating direction may be smaller than or substantially equal to the thickness of the end faces of the cores formed by the first end faces and the second end faces in the laminating direction.

In one embodiment of the present invention, the first laminated core and the second laminated core are laminated in the standing direction on the base portion, for example.

In one embodiment of the present invention, for example, the first laminated core and the second laminated core have a first end face and a second end face, respectively, in which the end faces of the plate-shaped cores are aligned, and the core has an end face formed of the first end face and the second end face. In this configuration, the coil device may be configured such that the three portions of the first portion, the first laminated core, and the second laminated core are joined by co-welding the first portion and the butt portion, wherein the height of the first portion in the standing direction is lower than the height of the boundary between the first end face and the second end face on the end face of the core.

In the coil device according to the embodiment of the present invention, the first laminated core may be disposed on the base portion, and the second laminated core may be disposed on the first laminated core.

In one embodiment of the present invention, the core is, for example, an EI core composed of a first laminated core as an I core and a second laminated core as an E core.

Drawings

Fig. 1 is an external perspective view of a coil device according to an embodiment of the present invention.

Fig. 2 is an exploded perspective view of a coil device according to an embodiment of the present invention.

Fig. 3A is a diagram schematically showing a manufacturing process of a coil device according to an embodiment of the present invention.

Fig. 3B is a diagram schematically showing a manufacturing process of a coil device according to an embodiment of the present invention.

Fig. 3C is a diagram schematically showing a manufacturing process of a coil device according to an embodiment of the present invention.

Fig. 3D is a diagram schematically showing a manufacturing process of a coil device according to an embodiment of the present invention.

Fig. 3E is a diagram schematically showing a manufacturing process of a coil device according to an embodiment of the present invention.

Fig. 4 is an enlarged side view of the vicinity of the rising portion of the fixing metal fitting of the coil device according to the embodiment of the present invention.

Fig. 5 is an enlarged side view of the vicinity of the rising portion of the fixing metal fitting of the coil device of the comparative example.

Fig. 6 is an enlarged side view of the vicinity of the rising portion of the fixing metal fitting of the coil device according to the modification of the present invention.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same or similar reference numerals are assigned to common or corresponding elements, and redundant description thereof is omitted.

Fig. 1 is an external perspective view of a coil device 1 according to an embodiment of the present invention. Fig. 2 is an exploded perspective view of the coil device 1. Fig. 3A to 3E schematically show a manufacturing process of the coil device 1.

In the following description, the direction from the top right to the bottom left in fig. 1 is referred to as the X direction, the direction from the top left to the bottom right is referred to as the Y direction, and the direction from the bottom up is referred to as the Z direction. The X, Y and Z directions are orthogonal to each other. For the sake of convenience of explanation, the side indicated by the arrow in the Z direction is referred to as the upper side, and the opposite side is referred to as the lower side. Note that the names of these directions are for convenience of use in explaining the relative positional relationship of the components, and do not indicate absolute directions. For example, the Z direction (vertical direction) is not limited to the vertical direction, and may be, for example, a horizontal direction.

The coil device 1 is, for example, a reactor for a household electrical appliance such as a washing machine or a refrigerator. The coil device 1 is merely an example of the embodiment of the present invention. The configuration of the embodiment of the present invention is not limited to this, and can be appropriately modified. The coil device 1 is not limited to a reactor (inductor), and may be replaced with another device having a core such as a transformer or a filter.

The coil device 1 has a coil 10, a core 20, a fixing fitting 30, and a bobbin 40. The coil device 1 is fixed to a substrate, not shown, by a fixing metal fitting 30.

The coil 10 is formed by spirally winding a conductive wire insulated and covered with enamel or the like. The coil 10 is wound around the outer periphery of the cylindrical portion 42 of the bobbin 40. As the wire of the lead, for example, copper, aluminum, or the like can be used. The coil 10 may be formed of a round wire, or may be formed of a flat wire such as a edgewise coil (edgewise coil). The coil 10 may be formed of a conductor in the form of a foil or a strip, such as a copper foil coil or a copper strip coil.

Core 20 is an EI core made up of an I core 22 and an E core 24 butted against each other. The I-core 22 is a first laminated core in which a plurality of I-shaped plate-shaped cores 22a are laminated in the X direction (lamination direction). The E core 24 is a second laminated core in which a plurality of E-shaped plate cores 24a are laminated in the X direction (lamination direction). In the present embodiment, as the plate-shaped

cores

22a and 24a, for example, a silicon steel plate can be used in consideration of a required inductance value and material cost. In addition, instead of silicon steel plates, other materials (e.g., Amorphous strips) may be used for the plate-shaped

cores

22a and 24 a.

The E core 24 includes a center leg portion 24A, a pair of outer leg portions 24B disposed on both sides thereof, and a coupling portion 24C coupling the center leg portion 24A and the pair of outer leg portions 24B. The middle leg portion 24A is inserted into a hollow portion of the bobbin 40 around which the coil 10 is wound. In the core 20, the center leg portion 24A and the pair of outer leg portions 24B of the E-core 24 are in contact with the upper surface of the I-core 22, thereby constituting a magnetic path (more specifically, a closed magnetic path) of the magnetic flux generated by the coil 10.

The fixing metal fitting 30 is a metal fitting for fixing the coil 10, the core 20, and the bobbin 40 to the substrate. The fixing member 30 includes: a base portion 32 on which the core 20 is placed; a pair of rising portions 34 (first portions) rising with respect to the base portion 32 in a Z direction (stacking orthogonal direction) orthogonal to the stacking direction (X direction) of the plate-shaped

cores

22a and 24 a; and a screw hole 36 for passing a screw for fastening the base 32 and the base plate.

The fixing fitting 30 is formed by processing a metal plate, for example. Specifically, a part of the metal plate forming the base portion 32 is cut (the metal plate is punched so as to form a slit 34a that penetrates the metal plate in the Z direction, that is, a slit 34a that is long in the X direction, and slits 34b that extend from both ends of the slit 34a to the inside of the base portion 32 in the Y direction). A portion 34c connected to the base portion 32 of the rectangular-shaped portion surrounded by the slit 34a and the pair of slits 34b in three sides is bent at right angles with respect to the base portion 32. Thereby forming a rising portion 34 rising with respect to the base portion 32. That is, the rising portion 34 is formed in a shape rising from the base portion 32 by bending a portion 34c continuous with the base portion 32 out of the above-described rectangular-shaped portions conforming to the rising portion 34. Therefore, the base portion 32 and the rising portion 34 are integrally formed. In addition, a pair of screw holes 36 are formed by punching 2 portions of the metal plate. As the metal plate forming the fixing metal fitting 30, for example, a galvanized steel plate can be used.

The pair of rising portions 34 are plate-shaped portions having a width in the X direction and a height in the Z direction, and are arranged to face each other with a space in the Y direction. In the space within the gap (i.e., the space between the pair of rising portions 34) on the base portion 32, the I core 22 is arranged in the longitudinal direction along the direction of the Y direction. The arrangement interval of the pair of rising portions 34 is slightly wider than the length of the I core 22 in the longitudinal direction. Therefore, when the I core 22 is disposed in the space, the end face 22b (first end face) of the I core 22 in which the end faces of the plate-shaped cores 22a are arranged is located at a position close to the rising portion 34 (a position slightly apart in the Y direction).

The E core 24 is disposed in a state where the center leg 24A and the pair of outer legs 24B abut against the upper surface of the I core 22. That is, the I core 22 and the E core 24 are stacked on the base portion 32 in the stacking orthogonal direction (Z direction, i.e., the rising direction in which the rising portion 34 rises) in the order of the I core 22 and the E core 24.

An end face 24b (second end face) of the E core 24, in which end faces of the plate cores 24a are arranged, is located on the same plane as the end face 22b of the I core 22. The end surface of the core 20 including the end surface 22b and the end surface 24b is referred to as an "end surface 20 a".

In the present embodiment, the I-core 22, the E-core 24, and the fixing metal fitting 30 (more specifically, the standing portion 34) are joined by co-welding (directly welding the welded base material and the base material without an intervening object such as a welding rod). For example, TIG welding or plasma welding, in which the bases are heated to fuse the bases to each other and then cooled to solidify the bases, can be used for the joining of these three portions. The joining of these three parts will be specifically described below.

Height H1 in the direction orthogonal to the lamination (Z direction) of rising portion 34 before welding is slightly lower (2.5 mm at maximum) than height H2 (see fig. 3D) of the boundary between end face 22b and end face 24b before welding. The height H2 of the boundary between the end face 22b and the end face 24b before welding is the same as the height H3 of the boundary 26 between the I core 22 and the E core 24 shown in fig. 1. The heights H1 to H3 and a height H1' described later are heights from the base 32 and the mounting surface of the board.

When the butt portion 28 and the rising portion 34 of the I core 22 and the E core 24 (more specifically, the outer leg portion 24B) including the boundary between the end surface 22B and the end surface 24B are melted by the welding machine, their molten metals are fused. The fused I-core 22, outer leg portion 24B, and rising portion 34 are cooled and solidified, whereby three portions of the I-core 22, E-core 24, and fixing metal fitting 30 are joined.

That is, the fixing metal fitting 30 has a rising portion 34 (first portion) whose tip portion is formed along the stacking direction (X direction) of the plate-shaped

cores

22a and 24a, close to the abutting portion 28 of the I core 22 and the E core 24 (outer leg portion 24B) (in other words, has a width in the X direction which is a direction orthogonal to the rising direction (Y direction)). The three parts of the I core 22, the E core 24, and the fixing metal fitting 30 are joined by co-welding the rising portion 34 having a height H1 in the lamination orthogonal direction (Z direction) lower than a height H2 of a boundary between the end face 22b and the end face 24b on the end face 20a and the butt portion 28.

Whether or not the joining is performed using the rising portion 34 having the height H1 lower than the height H2 can be grasped from the relationship between the height H1' of the rising portion 34 after solidification and the height H3 of the boundary 26 between the I core 22 and the E core 24. Specifically, when joining is performed using rising portion 34 having height H1 lower than height H2, height H1' of rising portion 34 after solidification is only a very small amount higher than height H3. Specifically, the height H1' is 1.5mm to 2.5mm higher than the height H3. The height H1' of the solidified standing portion 34 varies to some extent in the width direction (X direction). Therefore, the height H1' here is, for example, an average value of the heights of the rising portions 34 at respective sampling points (for example, 10 points located at positions spaced by Nmm) in the width direction (X direction).

Since the rising portion 34 is formed lower than the boundary between the end face 22b and the end face 24b in the lamination orthogonal direction (Z direction), the boundary between the end face 22b and the end face 24b is exposed without being covered with the rising portion 34 before welding. Therefore, the butt portion 28 including the boundary is directly heated by the arc heat to be melted. Since the butt joint portion 28 is directly heated, insufficient melting of the butt joint portion 28 can be avoided, and the three portions of the I-core 22, the E-core 24, and the fixing fitting 30 are firmly joined.

On the other hand, when the rising portion 34 is formed higher than the boundary between the end face 22b and the end face 24b in the lamination orthogonal direction (Z direction) or the rising portion 34 is formed at the same height as the boundary, the boundary between the end face 22b and the end face 24b is covered with the rising portion 34 and is not exposed before welding. In this case, the boundary can be indirectly heated only by the arc heat via the rising portion 34. Therefore, the butt portion 28 becomes insufficient in melting, and it becomes difficult to ensure the joint strength of the three portions of the I core 22, the E core 24, and the fixing metal fitting 30.

In addition, when the rising portion 34 is formed to be excessively lower than the boundary between the end face 22B and the end face 24B in the lamination orthogonal direction (Z direction) (for example, when the difference between the height H1 and the height H2 exceeds 2.5mm), for example, the molten metal of the rising portion 34 and the molten metal of the outer leg portion 24B located apart from the rising portion cannot be sufficiently fused, and it is difficult to secure the bonding strength between the E core body 24 and the fixing metal 30.

As described above, in the coil device 1 of the present embodiment, the I core 22, the E core 24, and the fixing metal fitting 30 are joined by one welding. Therefore, the coil device 1 can be manufactured with fewer welding man-hours than the coil device of the related art.

The width W1 (dimension in the X direction) of the standing part 34 before welding is smaller than the thickness T1 (dimension in the X direction) of the end face 20a or the same as the thickness T1. Specifically, the width W1 of the standing part 34 before welding is 50% to 100% of the thickness T1. The width W1 '(dimension in the X direction) of the solidified portion 34' of the standing portion 34 is smaller than the thickness T1 or substantially equal to the thickness T1. The width W1' is uneven to some extent in the height direction (Z direction). Therefore, the width W1 'here is, for example, an average value of the widths of the portions 34' at respective sampling points (for example, 10 points at positions spaced by Mmm) in the height direction (Z direction).

The wider the width W1 of the standing part 34 before welding, the wider the range in which the butt portion 28 and the standing part 34 can be welded in the X direction. However, when the width W1 is formed to exceed the width of 100% of the thickness T1, the protruding portion of the standing part 34 before welding that protrudes from the end face 20a in the X direction as compared to the butting portion 28 is difficult to fuse with the butting portion 28. The protruding portion that is not fused with the butt portion 28 flows on the base portion 32, for example, to solidify. Therefore, the appearance of the coil device 1 is deteriorated. In addition, since the width W1 is formed to be wide, the fixing fitting 30 must be made of a large metal plate.

The narrower the width W1 of the standing part 34 before welding, the more easily the arc heat is transmitted to the butt portion 28 and the more easily the butt portion 28 is melted. However, when the width W1 is formed to be less than 50% of the thickness T1, the welding amount in the X direction of the butted portion 28 and the raised portion 34 cannot be sufficiently secured.

In view of the above, the width W1 of the standing part 34 before welding is more preferably 50% or more and less than 100% of the thickness T1, for example, so that the ease of melting the butt portion 28 and the amount of welding in the X direction between the butt portion 28 and the standing part 34 can be both ensured.

Fig. 4 is an enlarged side view of the vicinity of the rising portion 34 of the coil device 1. The rising portion 34 is formed by partially cutting and bending a metal plate in a region closer to the center of the base portion 32 than a portion 34c corresponding to the root portion (in other words, in a region where the core 20 is placed) and rising the metal plate. As a result, as shown in fig. 4, the center of curvature C of the portion 34C (the curved portion formed by bending a part of the metal plate) is located on the opposite side of the solid portion 34 from the core 20.

Fig. 5 is an enlarged side view of the vicinity of the rising portion 134 of the coil device 101 of the comparative example. In the comparative example, the rising portion 134 is formed by partially cutting and bending a metal plate in an area on the outer side of the base portion 132 than the portion 134c corresponding to the root portion thereof (in other words, outside the area where the core 120 is placed), and rising the metal plate. As a result, as shown in fig. 5, the portion 134C has a curved shape in which the center of curvature C' is located closer to the core 120 than the rising portion 134.

In the comparative example, even if the rising portion 134 is attempted to be brought into contact with the core 120, since the portion 134c is mechanically interfered with the core 120 (the portion 134c is brought into contact with the core 120), as shown in fig. 5, substantially the entire rising portion 134 has to be disposed apart from the end face 120a of the core 120 by at least the curvature radius of the portion 134 c. The wider the gap between the end surface 120a and the rising portion 134 (in other words, the wider the air layer between the abutting portion 128 and the rising portion 134), the more difficult it is for the molten metals of the abutting portion 128 and the rising portion 134 to fuse.

In contrast, in the present embodiment, since the portion 34c does not mechanically interfere with the core 20, substantially the entire rising portion 34 can be disposed in contact with the end surface 20a of the core 20 as shown in fig. 4. Since the gap between the butt portion 28 and the rising portion 34 can be reduced as compared with the comparative example, the molten metals of the butt portion 28 and the rising portion 34 are easily fused.

In the present embodiment, the standing portion 34 is formed by partially cutting and bending a metal plate in a region where the core 20 is placed, and standing the metal plate. Thus, the size (area) of the metal plate can be reduced and the material cost can be reduced, as compared with the case where the portion constituting the rising portion 34 is formed outside the region where the core 20 is placed.

In the present embodiment, the I core 22 is disposed on the base portion 32, and the E core 24 is disposed on the I core 22. The height of the I core 22 in the Z direction is shorter than the length of the outer leg 24B in the Z direction. Therefore, the height position of the butt portion 28 with respect to the base portion 32 can be reduced as compared with a structure in which the I core 22 is disposed on the E core 24. Since the height of the rising portion 34 can be suppressed as the height position of the abutting portion 28 is lowered, the fixing metal fitting 30 can be made of a smaller metal plate.

Next, a method for manufacturing the coil device 1 will be described with reference to fig. 3A to 3E. The following method for manufacturing the coil device 1 is merely an example. The method of manufacturing the coil device 1 is not limited to the method of performing the steps shown in fig. 3A to 3E, and can be appropriately modified.

As shown in fig. 3A, a portion of the metal plate forming the base portion 32 is cut in a region closer to the center of the base portion 32 than the portion 34c, thereby forming a slit 34a and a pair of slits 34 b. In addition, a pair of screw holes 36 are formed by punching 2 portions of the metal plate.

As shown in fig. 3B, the portion 34c is bent at a right angle with respect to the base 32. Thereby, a standing portion 34 standing up with respect to the base portion 32 is formed.

As shown in fig. 3C, on the base portion 32, all the plate-shaped cores 22a constituting the I-core 22 are arranged side by side in the stacking direction (X direction) with no gap therebetween in the direction along the Y direction in the longitudinal direction between the pair of rising portions 34 (in other words, all the plate-shaped cores 22a are stacked in the stacking direction with the longitudinal direction in the Y direction). The plurality of plate-shaped cores 22a arranged in the stacking direction are sandwiched and fixed by a fixing member such as a jig so that the plate-shaped cores 22a are not separated from each other on the base portion 32.

The center leg portion 24A of the E core 24 is inserted into the hollow portion of the bobbin 40 around which the coil 10 is wound. Next, as shown in fig. 3D, the center leg 24A and the pair of outer legs 24B of the E core 24 are brought into contact with the upper surface of the I core 22. All the plate-shaped cores 24a forming the E core 24 are fixed integrally in advance by welding. Specifically, the center leg portions 24A of all the plate-shaped core bodies 24A forming the E core body 24 are joined in advance by welding.

As shown in fig. 3E, the rising portion 34 and the butt portion 28 are co-welded, and the I core 22, the E core 24, and the fixing metal fitting 30 are joined together. In order to secure the welding amount between the abutting portion 28 and the rising portion 34 in the X direction, for example, the rising portion 34 having the same width W1 as the thickness T1 of the end surface 20a can be used. In order to ensure both the ease of melting and the amount of welding of the butt portion 28, for example, the rising portion 34 having a width W1 of 50% or more and less than 100% of the thickness T1 of the end face 20a may be used. In addition, in order to directly heat and melt the abutting portion 28 including the boundary between the end surface 22b and the end surface 24b by arc heat, the rising portion 34 having a height H1 lower than the height H2 of the boundary (but 2.5mm lower at most) can be used.

The above is a description of exemplary embodiments of the invention. The embodiments of the present invention are not limited to the above description, and various modifications are possible within the scope of the technical idea of the present invention. For example, the embodiments disclosed as examples in the specification or configurations obtained by appropriately combining the embodiments which are obvious from the above description are also included in the embodiments of the present invention.

Fig. 6 is an enlarged side view of the vicinity of the rising portion 34 of the coil device 1 according to the modification of the present invention. As described in the above-described embodiment, the arrangement interval between the pair of rising portions 34 is slightly wider than the length of the I core 22 in the longitudinal direction. Therefore, when the I core 22 is disposed between the pair of rising portions 34, a gap can be formed between the end surface 22b of the I core 22 and the rising portions 34. The wider the gap, the more difficult it is for the respective molten metals of the butt portion 28 and the rising portion 34 to fuse. Therefore, as shown in fig. 6, the rising portion 34 can be plastically deformed so that a portion 34c as a root portion slightly falls from a posture perpendicular to the base portion 32 (in other words, a state of being bent at right angles to the base portion 32) toward the butting portion 28 side at the time of or before welding. That is, the rising portion 34 may rise at an angle inclined with respect to the base portion 32 so that at least a part (specifically, a tip end of the rising portion 34) approaches the abutting portion 28. Thereby, the gap between the abutting portion 28 and the rising portion 34 can be reduced.

Since the wider the width W1 of the rising portion 34, the higher the rigidity of the rising portion 34, the more difficult it is to plastically deform the rising portion 34 toward the butting portion 28 side. Accordingly, the rising portion 34 may be divided into a plurality of portions in the X direction (in other words, a plurality of rising portions 34 arranged in the X direction and having a narrow width). By forming the plurality of rising portions 34 with a narrow width, the rising portions 34 can be easily plastically deformed toward the butting portion 28, and the welding amount in the X direction between the butting portion 28 and the rising portions 34 can be secured.

Claims

1. A coil device, comprising:

a core body that is a laminated core body in which a plurality of plate-shaped core bodies are laminated, and that has a first laminated core body and a second laminated core body butted against each other; and

a fixing fitting for fixing the core to a substrate,

the fixing fitting has:

a base on which the core is placed; and

a first portion formed in a shape standing up with respect to the base portion by bending a portion of a metal plate forming the base portion, the first portion being close to a butt portion of the first laminated core and the second laminated core and having a width in a direction orthogonal to a standing direction standing up with respect to the base portion and in a stacking direction of the plate-shaped cores included in the laminated cores,

the three portions of the first portion, the first laminated core, and the second laminated core are joined together by co-welding the first portion and the butt portion,

a center of curvature of a curved shape formed by bending a portion of the metal plate is located on an opposite side of the core body with respect to the first portion.

2. A coil device, comprising:

a fixing fitting for fixing the core to a substrate,

the fixing fitting has:

a base on which the core is placed; and

the metal plate is formed with a slit penetrating the metal plate and conforming to the first portion, and the first portion is formed in a shape standing upright with respect to the base portion by bending a portion continuous with the base portion out of a portion conforming to the first portion by the slit.

3. A coil device, comprising:

a fixing fitting for fixing the core to a substrate,

the fixing fitting has:

a base on which the core is placed; and

the first portion stands at an angle inclined with respect to the base portion so that at least a part thereof is close to the butt portion.

4. A coil device according to any one of claims 1 to 3, wherein:

the first laminated core and the second laminated core have a first end face and a second end face formed by arranging end faces of the plate-shaped cores, respectively,

the width of the first portion in the stacking direction is smaller than or substantially equal to the thickness of an end face of the core formed by the first end face and the second end face in the stacking direction.

5. The coil apparatus according to claim 1 or 2, wherein:

the first laminated core and the second laminated core are laminated in the standing direction on the base portion.

6. The coil apparatus of claim 5, wherein:

the core has an end face formed by the first end face and the second end face,

the three portions are joined together by co-welding the first portion and the butt portion, wherein a height of the first portion in the standing direction is lower than a height of a boundary of the first end face and the second end face on the end face of the core.

7. The coil apparatus of claim 5, wherein:

the first laminated core is disposed on the base, and the second laminated core is disposed on the first laminated core.

8. A coil device according to any one of claims 1 to 3, wherein:

the core is an EI core composed of the first laminated core as an I core and the second laminated core as an E core.