WO2024209691A1 - コイル部品 - Google Patents

コイル部品 Download PDF

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Publication number
WO2024209691A1
WO2024209691A1 PCT/JP2023/014433 JP2023014433W WO2024209691A1 WO 2024209691 A1 WO2024209691 A1 WO 2024209691A1 JP 2023014433 W JP2023014433 W JP 2023014433W WO 2024209691 A1 WO2024209691 A1 WO 2024209691A1
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WO
WIPO (PCT)
Prior art keywords
magnetic core
base portion
coil component
core
cover portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/014433
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
慶 田中
仁 守屋
亜砂美 村上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumida Corp
Original Assignee
Sumida Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumida Corp filed Critical Sumida Corp
Priority to CN202380095865.8A priority Critical patent/CN120883297A/zh
Priority to PCT/JP2023/014433 priority patent/WO2024209691A1/ja
Priority to DE112023006161.0T priority patent/DE112023006161T5/de
Priority to JP2025512381A priority patent/JPWO2024209691A1/ja
Publication of WO2024209691A1 publication Critical patent/WO2024209691A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F17/04—Fixed inductances of the signal type with magnetic core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/263—Fastening parts of the core together
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type
    • H01F2017/0093—Common mode choke coil

Definitions

  • the present invention relates to coil components.
  • the coil component of Patent Document 1 includes a magnetic core formed in a ring shape, a coil wound around the magnetic core, a base portion that holds the magnetic core, and a cover portion that covers the magnetic core, with the base portion and the cover portion each being formed from a separate member.
  • Patent Document 1 According to the inventors' investigations, there is room for improvement in the structure of the coil component in Patent Document 1 in terms of ensuring the structural strength of the base and cover parts more reliably.
  • the present invention was made in consideration of the above problems, and provides a coil component with a structure that can more reliably ensure the structural strength of the coil component.
  • a magnetic core having an annular shape and a structure divided into a plurality of divided cores in a circumferential direction, A coil wound around the magnetic core; A body member holding the magnetic core; a plurality of metal terminal members to which the coils are electrically connected; A coil component comprising: A coil component is provided in which the main body member integrally has a base portion on which the multiple terminal members are provided and on which the magnetic core is arranged, a cover portion covering the magnetic core, and a connecting portion connecting the base portion and the cover portion to each other.
  • the present invention makes it possible to more reliably ensure the structural strength of coil components.
  • FIG. 2 is a perspective view of a coil component according to an embodiment.
  • FIG. 2 is an exploded perspective view of the coil component according to the embodiment.
  • FIG. 2 is a plan view of the coil component according to the embodiment.
  • FIG. 2 is a bottom view of the coil component according to the embodiment.
  • FIG. 4 is a cross-sectional view taken along line AA shown in FIG. 3.
  • FIG. 2 is a front view of the coil component according to the embodiment.
  • FIG. 2 is a perspective view of a main body member in the embodiment.
  • FIG. 4 is a side view of the main body member in the embodiment.
  • 7 is a partially enlarged view showing a first core arrangement portion and its surrounding structure in the embodiment, and is a cross-sectional view taken along line AA shown in FIG. 6.
  • FIGS. 10(a) and 10(b) are diagrams showing split cores of a magnetic core in an embodiment, where FIG. 10(a) is a plan view and FIG. 10(b) is a cross-sectional view taken along line AA shown in FIG. 10(a).
  • 11A is a partial enlarged view of the first fitting recess
  • FIG. 11B shows a state in which a terminal member is fitted into the fitting recess from the state shown in FIG. 11A.
  • 12(a) is a cross-sectional view taken along line AA in FIG. 11(a)
  • FIG. 12(b) shows a state in which a terminal member has been fitted into the fitting recess from the state shown in FIG. 12(a).
  • FIG. 13(a) and 13(b) are diagrams showing a magnetic core in a modified example of the embodiment, where FIG. 13(a) is a plan view and FIG. 13(b) is a cross-sectional view taken along line AA shown in FIG. 13(a).
  • the coil component 100 of this embodiment includes a magnetic core 10 that is formed in a ring shape and has a structure divided into a plurality of split cores 11 in the circumferential direction, a coil 90 wound around the magnetic core 10, a main body member 20 that holds the magnetic core 10, and a plurality of metal terminal members 80 to which the coils 90 are each electrically connected.
  • the main body member 20 integrally comprises a base portion 30 on which a plurality of terminal members are provided and on which the magnetic core 10 is arranged, a cover portion 60 which covers the magnetic core 10, and a connection portion 70 which interconnects the base portion 30 and the cover portion 60.
  • integrally formed means that the entire main body member 20 including the base portion 30, the cover portion 60 and the connection portion 70 is integrally formed.
  • covering the magnetic core 10 here means that, in a planar view, the cover portion 60 overlaps with at least a portion of the magnetic core 10; in this embodiment, as described below, in a planar view, the entire magnetic core 10 is contained within the outline of the cover portion 60 (the entire magnetic core 10 overlaps with the cover portion 60).
  • a base portion 30 on which a plurality of terminal members are provided and on which a magnetic core 10 is arranged, a cover portion 60 covering the magnetic core 10, and a connection portion 70 connecting the base portion 30 and the cover portion 60 to each other are integrated.
  • the base portion 30 and the cover portion 60 are configured from a single member, the number of molds required to manufacture the coil component 100 can be reduced.
  • the magnetic core 10 is divided into multiple split cores 11, even if the base portion 30 and the cover portion 60 are integrated, the magnetic core 10 (multiple split cores 11) can be easily assembled to the main body member 20 and the cover portion 60. In this way, according to this embodiment, the ease of manufacturing the coil component 100 can also be improved.
  • the coil component 100 will be described in more detail below.
  • the up-down direction is referred to as the Z direction.
  • the bottom (lower side) is the side on which terminal members 80 (FIG. 1, etc.) described later are arranged, that is, the mounting surface side on which the coil component 100 is mounted.
  • the positional relationships of the various parts (particularly the up-down positional relationships) during manufacture and use of the coil component 100 are not limited to the positional relationships described in this specification.
  • the axial direction of the coil 90 extends in a direction perpendicular to the Z direction.
  • the axial direction of the coil 90 is referred to as the Y direction, one side in the Y direction is referred to as the front (front), and the other side 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 side of the X direction is referred to as the right (rightward), and the other side is referred to as the left (leftward).
  • the side where the connection portion 70 is located is referred to as the inner side (inner side), and the side opposite the inner side is referred to as the outer side (outer side).
  • a direction perpendicular to the Z direction is referred to as horizontal (horizontal direction), and a direction along the Z direction is referred to as vertical (vertical direction).
  • the base portion 30 and the cover portion 60 have opposing surfaces 31, 61, respectively, that face each other.
  • the connection portion 70 is interposed between the opposing surfaces 31, 61 of the base portion 30 and the cover portion 60, and connects these opposing surfaces 31, 61 to each other.
  • the multiple split cores 11 (in this embodiment, a first magnetic core 11 a and a second magnetic core 11 b described below) are disposed on an opposing surface 31 of the base portion 30 . With this configuration, the multiple split cores 11 (magnetic cores 10 ) can be stably held between the base portion 30 and the cover portion 60 .
  • the opposing direction between the base part 30 and the cover part 60 is the up-down direction, and the base part 30 is disposed on the lower side and the cover part 60 is disposed on the upper side with respect to the magnetic core 10. Therefore, the opposing surface 31 of the base part 30 is the upper surface of the base part 30, and the opposing surface 61 of the cover part 60 is the lower surface of the cover part 60.
  • the opposing direction between the base portion 30 and the cover portion 60 is not limited to the above example, and can be appropriately set depending on the structure of each component constituting the coil part 100 and the desired positional relationship between each component.
  • the magnetic core 10 is formed in an annular shape and has a structure divided into a plurality of split cores 11 in the circumferential direction. More specifically, as shown in Fig. 2, the magnetic core 10 includes a pair of left and right core members as the split core 11, i.e., a first magnetic core 11a arranged on the left side and a second magnetic core 11b arranged on the right side.
  • the first magnetic core 11a and the second magnetic core 11b are arranged, for example, facing each other and combined with each other to form a rectangular ring shape in a plan view (see Figs. 3 and 4).
  • the first magnetic core 11a and the second magnetic core 11b form a closed magnetic circuit.
  • the first magnetic core 11a and the second magnetic core 11b are formed, for example, to have the same shape and dimensions as each other and are arranged symmetrically to each other. More specifically, in this embodiment, each of the first magnetic core 11a and the second magnetic core 11b is, for example, a so-called U-core, and has a U-shaped planar shape.
  • the first magnetic core 11a has a base 12 extending in the front-rear direction, and a pair of outer legs 13 protruding to the right from both ends of the base 12.
  • the base 12 is formed, for example, in a generally rectangular column shape that is long in the front-rear direction.
  • each outer leg 13 is formed, for example, in a generally rectangular column shape that is long in the left-right direction.
  • the second magnetic core 11b includes a base 12 and a pair of outer legs 13.
  • the pair of outer legs 13 protrude leftward from both ends of the base 12.
  • the entire surface on the base portion 30 side (the lower surface in this embodiment) is a first convex curved surface 14 that is convex toward the base portion 30, and the entire surface on the cover portion 60 side (the upper surface in this embodiment) is a second convex curved surface 15 that is convex toward the cover portion 60.
  • each of the lower surface and the upper surface of the magnetic core 10 has a rounded shape.
  • the "entire surface on the base portion 30 side” means substantially the entire surface on the base portion 30 side in the magnetic core 10, and specifically, at least 80% or more (more preferably 90% or more) may be the first convex curved surface 14.
  • the surface on the base portion 30 side may include, for example, a slightly flat surface.
  • the "entire surface on the cover portion 60 side” means substantially the entire surface on the cover portion 60 side in the magnetic core 10, and specifically, at least 80% or more (more preferably 90% or more) may be the second convex curved surface 15.
  • the surface on the cover portion 60 side may include, for example, a slightly flat surface.
  • the winding 93 of the coil 90 can be wound around the magnetic core 10 in a shape closer to a cylinder (see FIG. 2, etc.) along the first convex curved surface 14 and the second convex curved surface 15, compared to a case where the upper and lower surfaces of the magnetic core 10 are flat.
  • the winding 93 of the coil 90 can be wound around the magnetic core 10 while suppressing the application of stress to the winding 93.
  • the first convex curved surface 14 of the magnetic core 10 is formed by the lower surface of the base 12 and the lower surfaces of each of the outer legs 13.
  • the second convex curved surface 15 of the magnetic core 10 is formed by the upper surface of the base 12 and the upper surfaces of each of the outer legs 13.
  • the upper surface of the base 12 in a cross section perpendicular to the extending direction of the base 12, is formed in an arc shape that is convex upward, and the lower surface of the base 12 is formed in an arc shape that is convex downward.
  • the side edges of the upper and lower surfaces of the base 12 are slightly flat.
  • the radius of curvature of each of the upper and lower surfaces is approximately constant. However, at each of one end and the other end of the base 12, the radius of curvature of each of the upper and lower surfaces is slightly larger than the radius of curvature of the other portions.
  • the upper surface of the outer leg 13 is formed in an arc shape that convex upward
  • the lower surface of the outer leg 13 is formed in an arc shape that convex downward.
  • the side edges of the upper and lower surfaces of the outer leg 13 are slightly flat.
  • the radius of curvature of the upper and lower surfaces is constant regardless of the position in the extension direction of the outer leg 13.
  • the radius of curvature of the first convex curved surface 14 and the radius of curvature of the second convex curved surface 15 are equal to each other.
  • the present invention is not limited to this example, and the radius of curvature of the first convex curved surface 14 and the radius of curvature of the second convex curved surface 15 may be different from each other.
  • the underside of the base 12 and the underside of each outer leg 13 are formed continuously with each other, and the entire assembly of the underside of the base 12 and the underside of each outer leg 13 forms a convex curved surface (first convex curved surface 14) that is smoothly convex downward.
  • the upper surface of the base 12 and the upper surfaces of each outer leg 13 are formed continuously with each other, and the entire assembly of the upper surface of the base 12 and the upper surfaces of each outer leg 13 forms a convex curved surface (second convex curved surface 15) that is smoothly convex upward.
  • the tip surface in the protruding direction of each of the outer legs 13 of the first magnetic core 11 a and the second magnetic core 11 b is formed flat and forms a vertical surface perpendicular to the axial direction of the coil 90 .
  • the inner and outer surfaces of the base 12 are also formed flat and are vertical surfaces perpendicular to the axial direction of the coil 90.
  • the inner surface of the base 12 of the first magnetic core 11a and the inner surface of the base 12 of the second magnetic core 11b face each other, and the outer surface of the base 12 of the first magnetic core 11a and the outer surface of the base 12 of the second magnetic core 11b face in opposite directions.
  • the inner surface of the base 12 may be, for example, a convex curved surface that is convex inward, and the outer surface of the base 12 may also be, for example, a convex curved surface that is convex outward.
  • the inner surface of the outer leg portion 13 may be, for example, a convex curved surface that is convex inward, and the outer surface of the outer leg portion 13 may be, for example, a convex curved surface that is convex outward.
  • the magnetic core 10 includes, for example, a first portion around which the coil 90 is wound and a second portion around which the coil 90 is not wound.
  • the second part on which the coil 90 is not wound is placed on the base portion 30, so that the magnetic core 10 can be well supported by the base portion 30 while preventing the base portion 30 from interfering with the coil 90.
  • the coil 90 is wound around the middle part (middle part in the extending direction) of the base 12 of each of the first magnetic core 11a and the second magnetic core 11b. Meanwhile, the front end part of the base 12 protrudes forward from the coil 90, and the rear end part of the base 12 protrudes rearward from the coil 90.
  • the coil 90 is not wound around each of the outer legs 13 of each of the first magnetic core 11a and the second magnetic core 11b. That is, in this embodiment, the middle part of the base 12 of each of the first magnetic core 11a and the second magnetic core 11b is the first part, and the front end part and the rear end part of the middle part and each of the outer legs 13 are the second part.
  • the entire lower surface of the magnetic core 10 is a first convex curved surface 14 that is convex downward, and the entire upper surface is a second convex curved surface 15 that is convex upward. Therefore, the portion of the magnetic core 10 that constitutes the first portion around which the coil 90 is wound is not limited to this example, and may be wound around the outer leg portion 13, for example.
  • the coil 90 includes a first coil 91 wound around the first magnetic core 11a and a second coil 92 wound around the second magnetic core 11b.
  • the first coil 91 and the second coil 92 are each formed of a winding 93.
  • the winding 93 of each of the first coil 91 and the second coil 92 is wound around the base 12 of the corresponding split core 11 (the first magnetic core 11a and the second magnetic core 11b).
  • the winding 93 wound around the base 12 forms a winding section 94 (see FIG. 2). Both ends of each winding 93 are electrically connected to the corresponding terminal member 80.
  • both ends of each winding 93 are pulled out from the winding section 94 and fixed to the corresponding terminal member 80, thereby being electrically connected to the terminal member 80 (see FIG. 1). Note that in FIGS. 2 to 5, the portion of the winding 93 pulled out from the winding section 94 (pulling out wire 95) and the end of the winding 93 are not shown.
  • the main body member 20 integrally includes a base portion 30 on which a plurality of terminal members are provided and on which the magnetic core 10 is disposed, a cover portion 60 that covers the magnetic core 10, and a connection portion 70 that interconnects the base portion 30 and the cover portion 60.
  • the cover portion 60 has a main body portion 62 that is formed, for example, in a flat plate shape and is disposed horizontally.
  • the main body portion 62 is formed with a positioning protrusion portion 66, which will be described later.
  • an opposing surface 61 (the lower surface of the cover portion 60) that faces the opposing surface 31 of the base portion 30 is composed of the lower surface of the main body portion 62 and a lower surface 67 of the positioning protrusion portion 66.
  • the opposing surface 61 is disposed horizontally.
  • the planar shape of the main body 62 is, for example, substantially rectangular.
  • a cutout portion 63 is formed in the rear right portion of the main body 62.
  • the cutout portion 63 makes it easy to determine the orientation of the cover 60, and therefore the main body member 20.
  • the cover portion 60 can be attracted by a mounter when mounting the coil component 100 on a substrate, facilitating the work of mounting the coil component 100 on a substrate.
  • the cover portion 60 does not have to be formed flat, for example.
  • the base portion 30 has, for example, a core arrangement portion 40 in which the magnetic core 10 is arranged. More specifically, the base portion 30 has, for example, a pair of front and rear core arrangement portions 40 as the core arrangement portion 40, i.e., a first core arrangement portion 42 arranged on the front side and a second core arrangement portion 44 arranged on the rear side. As shown in Fig. 1, etc., the first magnetic core 11a and the first magnetic core 11a are held in a state of being arranged in a rectangular annular shape in a plan view by the first core arrangement portion 42 and the second core arrangement portion 44.
  • the base portion 30 further has a plate-like portion 35 that connects the first core arrangement portion 42 and the second core arrangement portion 44 to each other.
  • the upper surface of the opposing surface 31 (base portion 30) facing the opposing surface 61 of the cover portion 60 is formed by the upper surfaces of the first core arrangement portion 42 and the second core arrangement portion 44 and the upper surface of the plate-shaped portion 35.
  • the plate-like portion 35 is formed in a flat plate shape and is disposed horizontally.
  • the planar shape of the plate-like portion 35 is, for example, substantially rectangular.
  • a front edge of the plate-shaped portion 35 is connected to the first core arrangement portion 42, and a rear edge of the plate-shaped portion 35 is connected to the second core arrangement portion 44.
  • the lower surface of the plate-shaped portion 35 is disposed flush with the lower surfaces of the first core arrangement portion 42 and the second core arrangement portion 44.
  • the first core arrangement portion 42 and the second core arrangement portion 44 are formed, for example, to have substantially the same shape and dimensions as each other, and are arranged symmetrically with respect to the front and rear. More specifically, as shown in Figures 5, 7 and 8, each of the first core arrangement section 42 and the second core arrangement section 44 is formed, for example, in a generally rectangular column shape that is long in the left-right direction. However, in this embodiment, as shown in Figures 1 and 3, etc., protruding sections 45 that protrude outward are formed at both ends of the second core arrangement section 44. As shown in Figure 1, a lead wire 95 drawn from the coil 90 can be engaged with the protruding sections 45.
  • Each of the first core arrangement portion 42 and the second core arrangement portion 44 is provided with a plurality of terminal members 80 (described in detail below).
  • the front outer leg 13 of the first magnetic core 11a and the front outer leg 13 of the second magnetic core 11b are each arranged on the middle portion (the middle portion in the extension direction) of the first core arrangement portion 42.
  • the rear outer leg 13 of the first magnetic core 11a and the rear outer leg 13 of the second magnetic core 11b are arranged on the intermediate portion (same as above) of the second core arrangement portion 44.
  • the base portions 12 of the first magnetic core 11 a and the second magnetic core 11 b are disposed so as to straddle between the first core arrangement portion 42 and the second core arrangement portion 44 .
  • the front end protruding forward from the coil 90 is positioned on the left end of the first core arrangement section 42, and the rear end protruding rearward from the coil 90 is positioned on the left end of the second core arrangement section 44.
  • the front end protruding forward from the coil 90 is positioned on the right end of the first core arrangement section 42, and the rear end protruding rearward from the coil 90 is positioned on the right end of the second core arrangement section 44.
  • connection portion 70 connects, for example, the center of the base portion 30 and the center of the cover portion 60 to each other. More specifically, in this embodiment, the connection part 70 is formed in a flat plate shape, and the plate surface is arranged facing the left-right direction. The upper end surface of the connection part 70 is connected to the center of the lower surface of the main body part 62 of the cover part 60, and the lower end surface of the connection part 70 is connected to the center of the upper surface of the plate-like part 35 of the base part 30. In this way, the connection part 70 connects the base part 30 and the cover part 60 to each other in a state where the base part 30 and the cover part 60 face each other in the up-down direction. The upper surface of the plate-like part 35 and the lower surface of the main body part 62 of the cover part 60 face each other in the up-down direction and are arranged parallel to each other.
  • each of the first magnetic core 11a and the second magnetic core 11b is entirely formed integrally from a magnetic material.
  • the main body member 20 (the base portion 30, the cover portion 60, and the connection portion 70) is, for example, entirely integrally molded from an insulating material such as resin.
  • the multiple split cores 11 surround the periphery of the connection portion 70 .
  • the split cores 11 can be easily assembled to the main body member 20 while forming a closed magnetic circuit using the split cores 11 .
  • the tip surface of the front outer leg 13 of the first magnetic core 11a and the tip surface of the front outer leg 13 of the second magnetic core 11b are butted against each other and are in surface contact.
  • the tip surface of the rear outer leg 13 of the first magnetic core 11a and the tip surface of the rear outer leg 13 of the second magnetic core 11b are butted against each other and are in surface contact.
  • the tip surface of the front outer leg 13 of the first magnetic core 11a and the tip surface of the front outer leg 13 of the second magnetic core 11b are fixed to each other by, for example, an adhesive (not shown).
  • the tip surface of the rear outer leg 13 of the first magnetic core 11a and the tip surface of the rear outer leg 13 of the second magnetic core 11b are fixed to each other by an adhesive (not shown).
  • the first magnetic core 11a and the second magnetic core 11b are integrally connected to each other to form the magnetic core 10 having a ring shape in a plan view.
  • the ring-shaped magnetic core 10 is held by the main body member 20 in a state where it is fitted onto the connecting portion 70.
  • the entire magnetic core 10 when viewed in the opposing direction between the base portion 30 and the cover portion 60 , the entire magnetic core 10 is contained within the outline of the base portion 30 .
  • the entire magnetic core 10 is contained inside the outline of the base portion 30 means that, in a planar view, the outline of the magnetic core 10 does not extend beyond the outline of the base portion 30, and the outline of the magnetic core 10 may, for example, overlap with the outline of the base portion 30.
  • the outer surfaces of the front outer legs 13 of the first magnetic core 11a and the front outer legs 13 of the second magnetic core 11b are disposed substantially flush with the front end surface of the base portion 30.
  • the outer surfaces of the rear outer legs 13 of the first magnetic core 11a and the rear outer legs 13 of the second magnetic core 11b are disposed substantially flush with the rear end surface of the base portion 30.
  • the entire magnetic core 10 is contained within the outline of the cover portion 60 .
  • the entire magnetic core 10 is contained inside the outline of the cover portion 60 means that, in a planar view, the outline of the magnetic core 10 does not extend beyond the outline of the cover portion 60, and the outline of the magnetic core 10 may, for example, overlap with the outline of the cover portion 60.
  • the base portion 30 can provide excellent support for each of the multiple split cores 11, i.e., the entire magnetic core 10.
  • the front-to-rear dimension of the entire cover portion 60 (the core arrangement portion 40 and the plate-like portion 35) is set to be approximately equal to the front-to-rear dimension of the magnetic core 10 (the assembly of the first magnetic core 11a and the second magnetic core 11b).
  • the left-to-right dimension of the entire cover portion 60 (same as above) is set to be approximately equal to the left-to-right dimension of the magnetic core 10 (same as above).
  • the outer surface of the base 12 of the first magnetic core 11a is disposed substantially flush with the left end surface of the cover portion 60
  • the outer surface of the base 12 of the second magnetic core 11b is disposed substantially flush with the right end surface of the cover portion 60.
  • the outer surfaces of the front outer legs 13 of the first magnetic core 11a and the front outer legs 13 of the second magnetic core 11b are disposed substantially flush with the front end surface of the cover portion 60.
  • the outer surfaces of the rear outer legs 13 of the first magnetic core 11a and the rear outer legs 13 of the second magnetic core 11b are disposed substantially flush with the rear end surface of the cover portion 60.
  • the cover portion 60 further has a positioning protrusion 66 for positioning the magnetic core 10.
  • the positioning protrusion 66 extends from the opposing surface 61 of the cover portion 60 towards the magnetic core 10 and restricts the magnetic core 10 from approaching the cover portion 60 in the opposing direction between the base portion 30 and the cover portion 60 . This makes it possible to easily determine the height position of the magnetic core 10 relative to the body member 20 in the vertical direction. Also, rattling of the magnetic core 10 in the vertical direction can be effectively suppressed.
  • a portion of the opposing surface 31 of the base portion 30 (in this embodiment, the upper surface of the core arrangement portion 40) has a recess 46 that is recessed toward the side opposite the magnetic core 10, and the first convex curved surface 14 of the magnetic core 10 is arranged in the recess 46. This allows the magnetic core 10 to be well held by the base portion 30 while still having the first convex curved surface 14 .
  • the first convex curved surface 14 of the second portion of the magnetic core 10 (in this embodiment, the pair of outer legs 13 ) is disposed in the recess 46 . This allows the magnetic core 10 to be well held by the base portion 30 while preventing the coil 90 from interfering with the base portion 30 .
  • the recess 46 includes a concave curved surface 47 recessed toward the side opposite to the magnetic core 10, and the concave curved surface 47 is in surface contact with the first convex curved surface 14 of the magnetic core 10.
  • the first convex curved surface 14 is engaged with the concave curved surface 47.
  • the upper surface of the core arrangement section 40 (the first core arrangement section 42 and the second core arrangement section 44) is formed as a recess 46, and further as a concave curved surface 47. More specifically, as shown in Figures 7 and 8, in the core arrangement portion 40, the upper surfaces of the left and right ends are each concave curved surfaces corresponding to the first convex curved surface 14 of the base 12 of the magnetic core 10, and the upper surface of the intermediate portion (the portion between the left and right ends) is a concave curved surface corresponding to the first convex curved surface 14 of the outer leg portion 13.
  • the outer portions 49a form part of the concave curved surface 47.
  • the imaginary line 201 referred to here is a straight line that bisects the core arrangement section 40 in the extension direction (left-right direction) of the core arrangement section 40 in a plan view.
  • the outer portion 49a when viewed in the extension direction (left-right direction) of the core arrangement section 40, has a concave curved surface that slopes downward from a position slightly offset inward from the outer edge of the outer portion 49a toward the middle position (position of the imaginary line 201) of the upper surface of the core arrangement section 40.
  • the outer edge of the outer portion 49a is formed slightly flat.
  • the inner portions 49b are formed substantially flat and are disposed horizontally with respect to the imaginary line 201.
  • the front end of the first convex curved surface 14 of the base 12 of the first magnetic core 11a is in surface contact with and engages with the upper surface of the left end of the first core arrangement section 42
  • the rear end of the first convex curved surface 14 is in surface contact with and engages with the upper surface of the left end of the second core arrangement section 44.
  • the front end of the first convex curved surface 14 of the base 12 of the second magnetic core 11b is in surface contact with and engages with the upper surface of the right end of the first core arrangement section 42
  • the rear end of the first convex curved surface 14 is in surface contact with and engages with the upper surface of the right end of the second core arrangement section 44.
  • the outer edge of the outer portion 49a of the core arrangement section 40 is slightly flattened, and the flat side edge of the lower surface of the base 12 is in surface contact with this flat portion. This prevents the base 12 from being outwardly displaced relative to the recess 46.
  • substantially the entire upper surface of the middle portion of the core arrangement section 40 constitutes a part of the concave curved surface 47 . More specifically, on the upper surface of the middle part of the core placement section 40, both the outer part 49a and the inner part 49b with respect to the virtual line 201 are concavely curved. More specifically, in the middle of the core placement section 40, the inner part with respect to the imaginary line 201 forms a raised portion 48 (see Figures 11(a) and 11(b)) that gradually rises inward and upward.
  • the upper surface of the raised portion 48 is a concave curved surface that slopes upward inward from the middle position (position of the imaginary line 201) of the upper surface of the core placement section 40.
  • the upper surface (inner portion 49b) of the raised portion 48 and the outer portion 49a of the upper surface of the core placement section 40 form a concave curved surface 47 that is recessed downward.
  • the first convex curved surfaces 14 of the front outer legs 13 of each of the first magnetic core 11a and the second magnetic core 11b are in surface contact with the upper surface of the intermediate portion of the first core arrangement section 42.
  • the first convex curved surfaces 14 of the rear outer legs 13 of each of the first magnetic core 11a and the second magnetic core 11b are in surface contact with the upper surface of the intermediate portion of the second core arrangement section 44.
  • the magnetic core 10 can be arranged in the core arrangement portion 40 so that both the first convex curved surface 14 of the base 12 and the outer leg portion 13 and the first convex curved surface 14 are in surface contact with the upper surface (concave curved surface 47) of the core arrangement portion 40.
  • the maximum depth of the recess 46 is, for example, preferably 1/20 to 1/5 of the maximum thickness dimension of the magnetic core 10 (T2 shown in FIG. 10(b)), and more preferably 1/15 to 1/10 of the maximum thickness dimension T2 of the magnetic core 10.
  • the cover portion 60 further has the positioning protrusions 66 that position the magnetic core 10.
  • the cover portion 60 has a pair of front and rear positioning protrusions 66 as the positioning protrusions 66.
  • the pair of front and rear positioning protrusions 66 are set to have, for example, the same shape and dimensions as each other, and are disposed symmetrically with respect to each other in the front-rear direction.
  • the front positioning protrusion 66 extends downward from, for example, the underside of the front end of the main body 62 of the cover 60.
  • the front positioning protrusion 66 is formed in a generally rectangular parallelepiped shape that is elongated in the front-rear direction, and the rear end of the positioning protrusion 66 is connected to the front end surface of the connection portion 70.
  • the front end surface of the front positioning protrusion 66 is disposed flush with the front end surface of the main body 62.
  • the underside 67 of the front positioning protrusion 66 is formed flat and disposed horizontally.
  • the left side surface of the front positioning protrusion 66 is disposed flush with the left side surface of the connection portion 70, and the right side surface of the positioning protrusion 66 is disposed flush with the right side surface of the connection portion 70.
  • the rear positioning protrusion 66 extends downward from, for example, the lower surface of the rear end of the main body 62 of the cover 60. Furthermore, the rear positioning protrusion 66 is formed in a generally rectangular parallelepiped shape that is elongated in the front-rear direction, and the front end of the positioning protrusion 66 is connected to the rear end surface of the connection portion 70. The rear end surface of the rear positioning protrusion 66 is disposed flush with the rear end surface of the main body 62. The lower surface 67 of the rear positioning protrusion 66 is formed flat and disposed horizontally.
  • the left side surface of the rear positioning protrusion 66 is disposed flush with the left side surface of the connection portion 70, and the right side surface of the positioning protrusion 66 is disposed flush with the right side surface of the connection portion 70.
  • the front positioning protrusion 66 is disposed above the boundary between the front outer leg 13 of the first magnetic core 11a and the front outer leg 13 of the second magnetic core 11b.
  • a small gap is formed between a lower surface 67 of the front positioning protrusion 66 and each of the upper surfaces of the front outer leg 13 of the first magnetic core 11a and the front outer leg 13 of the second magnetic core 11b.
  • the rear positioning protrusion 66 is disposed above the boundary between the rear outer leg 13 of the first magnetic core 11a and the rear outer leg 13 of the second magnetic core 11b.
  • a small gap is formed between a lower surface 67 of the rear positioning protrusion 66 and each of the upper surfaces of the rear outer leg 13 of the first magnetic core 11a and the rear outer leg 13 of the second magnetic core 11b.
  • the shortest distance in the vertical direction between the lower surface 67 of the positioning protrusion 66 and the second convex curved surface 15 is smaller than the distance between the upper end of the winding portion 94 and the lower surface of the main body portion 62 (D3 shown in Figure 6).
  • the second convex curved surface 15 can be made to abut against the lower surface 67 of the positioning protrusion 66 first, so that it is possible to suppress the winding 93 from interfering with the lower surface of the main body portion 62 and causing the insulating coating of the winding 93 to wear.
  • the coil device 100 includes a plurality of (for example, four) terminal members 80 electrically connected to the coil 90 .
  • the multiple terminal members 80 are formed to have the same shape and dimensions as one another.
  • an engagement recess 50 is formed in the base portion 30, and the terminal member 80 is engaged with the engagement recess 50 by an engagement structure (in this embodiment, a plurality of protrusions 55 described later).
  • the terminal member 80 can be easily fixed to the core placement portion 40 without using an adhesive or the like.
  • the base portion 30 has, as the mating recesses 50, a pair of left and right first mating recesses 51 formed in the first core arrangement portion 42 and a pair of left and right second mating recesses 52 formed in the second core arrangement portion 44.
  • the mating recesses 50 a pair of left and right first mating recesses 51 formed in the first core arrangement portion 42 and a pair of left and right second mating recesses 52 formed in the second core arrangement portion 44.
  • first terminal members 81 are each fitted into the first mating recess 51
  • second terminal members 82 are each fitted into the second mating recess 52.
  • the first terminal members 81 are arranged symmetrically to one another in the first core arrangement portion 42.
  • the second terminal members 82 are arranged symmetrically to one another in the second core arrangement portion 44.
  • Each of the terminal members 80 is formed, for example, by bending a long, plate-like metal member into a substantial Z-shape (see FIGS. 6 and 12B). More specifically, the terminal member 80 is bent in two stages in the longitudinal direction, and one end and the other end of the terminal member 80 face each other in the up-down direction and are arranged horizontally, while the intermediate portion between the one end and the other end (hereinafter, the vertical portion 87) (the intermediate portion in the longitudinal direction) is arranged vertically. Furthermore, in the terminal member 80, with respect to the vertical portion 87, the one end protrudes inward and is arranged on the lower side, and the other end protrudes outward and is arranged on the upper side.
  • the one end is an external terminal 85 that is connected to the outside when the coil component 100 is mounted, and the other end is an internal terminal 86 that is connected to the winding 93 of the coil 90.
  • the external terminal 85 is formed in a generally rectangular shape that is elongated in the left-right direction in a plan view.
  • the shape of the vertical portion 87 when viewed in the left-right direction is formed in a generally rectangular shape that is elongated in the up-down direction.
  • the internal terminal 86 is formed in a bifurcated shape that opens toward the tip side (outward).
  • an end of a lead wire 95 (winding 93 of winding 93) drawn out from a winding portion 94 of the coil 90 is clamped by the bifurcated portion of the internal terminal 86 and fixed to the internal terminal 86 by resistance welding.
  • the method of fixing the winding 93 to the internal terminal 86 is not limited to this example, and the winding 93 may be fixed by, for example, entangling or soldering.
  • the pair of left and right first fitting recesses 51 are formed to have the same shape and dimensions as each other and are arranged symmetrically.
  • the pair of left and right second fitting recesses 52 are formed to have the same shape and dimensions as each other and are arranged symmetrically.
  • the first fitting recesses 51 and the second fitting recesses 52 are formed to have the same shape and dimensions as each other.
  • the fitting structure that fits the terminal member 80 into the fitting recess 50 is one or a plurality of protrusions 55 (six protrusions 55 in this embodiment). When the terminal member 80 is fitted into the fitting recess 50 , the terminal member 80 is pressed into the fitting recess 50 while crushing the multiple protrusions 55 .
  • the terminal member 80 to be easily and satisfactorily fixed to the core arrangement portion 40 without using, for example, an adhesive or the like. Furthermore, even if there is variation in the size of the terminal member 80 relative to the fitting recess 50, for example, the protrusion 55 can absorb this variation in size.
  • the method of fixing the terminal member 80 to the core arrangement portion 40 (base portion 30) is not limited to an interlocking structure, and the terminal member 80 may be fixed to the base portion 30 by a method such as insert molding, crimping or adhesive bonding.
  • the fitting recess 50 (each of the first fitting recess 51 and each of the second fitting recess 52) includes a pair of mutually opposing first side surface portions 53 and a pair of mutually opposing second side surface portions 54.
  • FIGS. 7, 8, 11(a) and 12(a) show the main body member 20 in a state before the terminal member 80 is press-fitted into the fitting recess 50.
  • the vertical portion 87 of the terminal member 80 is arranged between a pair of first side portions 53
  • the internal terminal 86 of the terminal member 80 is arranged between a pair of second side portions 54.
  • the protrusions 55 include a plurality (e.g., four) of first protrusions 56 formed on a pair of first side portions 53, and a plurality (e.g., two) of second protrusions 57 formed on a pair of second side portions 54.
  • two first protrusions 56 are formed on each of the pair of first side surface portions 53.
  • the first protrusion 56 formed on one of the first side surface portions 53 protrudes toward the vertical portion 87 of the terminal member 80 and is crushed between the vertical portion 87 and the one of the first side surface portions 53.
  • the first protrusion 56 formed on the other of the first side surface portions 53 protrudes toward the vertical portion 87 of the terminal member 80 and is crushed between the vertical portion 87 and the other of the first side surface portions 53.
  • the vertical portion 87 is pressed toward the other of the first side surface portions 53 by the first protrusion 56 formed on one of the first side surface portions 53 and is pressed toward the one of the first side surface portions 53 by the first protrusion 56 formed on the other of the first side surface portions 53, and is fitted into the fitting recess 50 in this state.
  • two second protrusions 57 are formed on each of the pair of second side surface portions 54.
  • the second protrusions 57 formed on the pair of second side surface portions 54 protrude toward the external terminal 85 of the terminal member 80 and are crushed between the external terminal 85 and the one second side surface portion 54.
  • the second protrusion 57 formed on the other second side surface portion 54 protrudes toward the external terminal 85 of the terminal member 80 and is crushed between the external terminal 85 and the other second side surface portion 54.
  • the external terminal 85 is pressed toward the other second side surface portion 54 by the second protrusion 57 formed on one second side surface portion 54 and is pressed toward the one second side surface portion 54 by the second protrusion 57 formed on the other second side surface portion 54, and is fitted into the fitting recess 50 in this state.
  • each terminal member 80 is contained within the fitting recess 50 and the outer contour of the base portion 30 in a plan view.
  • the internal terminals 86 of each terminal member 80 protrude outward from the fitting recess 50 and the outer contour of the base portion 30 in a plan view.
  • each terminal member 80 is fitted into the corresponding fitting recess 50 in this manner.
  • the coil component 100 is configured as described above.
  • such a coil component 100 can be used as a common mode choke coil.
  • the use of the coil component 100 is not limited to this example.
  • the coil component 100 can be assembled, for example, as follows. First, each winding 93 of the coil 90 (the first coil 91 and the second coil 92) is wound around the base portion 12 of each of the first magnetic core 11a and the second magnetic core 11b. Next, the first magnetic core 11a and the second magnetic core 11b are each placed on the core arrangement section 40. More specifically, the front outer leg 13 of the first magnetic core 11a is inserted from the left onto the upper surface of the left end of the first core arrangement section 42, and the rear outer leg 13 of the first magnetic core 11a is inserted from the left onto the upper surface of the left end of the second core arrangement section 44.
  • the front outer leg 13 of the second magnetic core 11b is inserted from the right onto the upper surface of the right end of the first core arrangement section 42, and the rear outer leg 13 of the second magnetic core 11b is inserted from the right onto the upper surface of the right end of the second core arrangement section 44.
  • the magnetic core 10 is placed between the opposing surface 61 of the cover section 60 and the opposing surface 31 of the base section 30.
  • the first convex curved surface 14 of the magnetic core 10 engages with the recess 46 (concave curved surface 47 ) of the core placement portion 40 .
  • the first magnetic core 11a and the second magnetic core 11b are fixed to each other by an adhesive (not shown), thereby forming the magnetic core 10 having a ring shape in a plan view.
  • the cover portion 60 has the positioning protrusions 66 that restrict the magnetic core 10 from approaching the cover portion 60. Therefore, for example, a desired positional relationship between the first magnetic core 11a and the second magnetic core 11b and a desired positional relationship between the magnetic core 10 and the main body member 20 in the vertical direction can be easily achieved without using a dedicated jig. This improves the ease of manufacturing the coil component 100.
  • an end of each winding 93 of the coil 90 is fixed to a corresponding internal terminal 86 of the terminal member 80. In the case of this embodiment, as one example, the end of the winding 93 is fixed to the internal terminal 86 by resistance welding. In this manner, the coil component 100 is obtained.
  • the magnetic core 10 is configured to have two U cores as the split core 11, but the present invention is not limited to this example, and the magnetic core 10 may be configured to have a U core and an I core as the split core 11, or an E core and an I core, or two E cores.
  • the magnetic core 10 includes an I core as the split core 11, as shown in Figures 13(a) and 13(b), it is preferable that the surface of the I core on the base portion 30 side is a first convex curved surface 14 convex toward the base portion 30, and the surface on the cover portion 60 side is a second convex curved surface 15 convex toward the cover portion 60.
  • At least a part of the surface on the cover portion 60 side may be the second convex curved surface 15, or the entire surface on the cover portion 60 side may be the second convex curved surface 15.
  • at least a part of the surface on the base portion 30 side may be the first convex curved surface 14, or the entire surface on the base portion 30 side may be the first convex curved surface 14.
  • the surface of the E core on the base portion 30 side is a first convex curved surface 14 convex toward the base portion 30, and the surface of the cover portion 60 side is a second convex curved surface 15 convex toward the cover portion 60.
  • the surface on the cover portion 60 side may be the second convex curved surface 15, or the entire surface on the cover portion 60 side may be the second convex curved surface 15.
  • at least a part of the surface on the base portion 30 side may be the first convex curved surface 14, or the entire surface on the base portion 30 side may be the first convex curved surface 14.
  • the magnetic core 10 is divided into two split cores 11, but the magnetic core 10 may also be divided into, for example, three or more split cores 11.
  • the present invention is not limited to this example.
  • the coil 90 may be indirectly wound around the magnetic core 10 via a bobbin portion (not shown).
  • the bobbin portion is formed by a part of the main body member 20.
  • a magnetic core that is formed in an annular shape and has a structure in which it is divided into a plurality of divided cores in the circumferential direction;
  • a coil component comprising: A coil component in which the main body member integrally has a base portion on which the multiple terminal members are provided and on which the magnetic core is arranged, a cover portion covering the magnetic core, and a connecting portion connecting the base portion and the cover portion to each other.
  • the base portion and the cover portion each have an opposing surface that faces each other, the connection portion is interposed between the opposing surfaces of the base portion and the cover portion and connects these opposing surfaces to each other;
  • the coil component according to (1) wherein the plurality of split cores are disposed on the opposing surfaces of the base portion.
  • the connection portion connects a center portion of the base portion and a center portion of the cover portion to each other,
  • the coil component according to claim 2 wherein the plurality of split cores surround the periphery of the connection portion.
  • a recess is formed in a part of the opposing surface of the base portion, the recess being recessed toward a side opposite to the magnetic core side, The coil component according to (7), wherein the first convex curved surface of the magnetic core is disposed in the recess.
  • the magnetic core includes a first portion around which the coil is wound and a second portion around which the coil is not wound, The coil component according to (8), wherein at least a portion of the first convex curved surface of the second portion is disposed in the recess.
  • the recess includes a concave curved surface recessed toward a side opposite to the magnetic core, The coil component according to (8) or (9), wherein the concave curved surface is in surface contact with the first convex curved surface of the magnetic core.
  • a fitting recess is formed in the base portion, The coil component according to any one of (1) to (10), wherein the terminal member is fitted into the fitting recess by a fitting structure.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
PCT/JP2023/014433 2023-04-07 2023-04-07 コイル部品 Ceased WO2024209691A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202380095865.8A CN120883297A (zh) 2023-04-07 2023-04-07 线圈部件
PCT/JP2023/014433 WO2024209691A1 (ja) 2023-04-07 2023-04-07 コイル部品
DE112023006161.0T DE112023006161T5 (de) 2023-04-07 2023-04-07 Spulenkomponente
JP2025512381A JPWO2024209691A1 (https=) 2023-04-07 2023-04-07

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0357904U (https=) * 1989-03-13 1991-06-05
JPH0423110U (https=) * 1990-06-19 1992-02-26
JPH0945550A (ja) * 1995-07-27 1997-02-14 Tokin Corp 高周波トランス

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0357904U (https=) * 1989-03-13 1991-06-05
JPH0423110U (https=) * 1990-06-19 1992-02-26
JPH0945550A (ja) * 1995-07-27 1997-02-14 Tokin Corp 高周波トランス

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DE112023006161T5 (de) 2026-01-29
JPWO2024209691A1 (https=) 2024-10-10

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