WO2024042949A1 - コイル部品 - Google Patents

コイル部品 Download PDF

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Publication number
WO2024042949A1
WO2024042949A1 PCT/JP2023/026909 JP2023026909W WO2024042949A1 WO 2024042949 A1 WO2024042949 A1 WO 2024042949A1 JP 2023026909 W JP2023026909 W JP 2023026909W WO 2024042949 A1 WO2024042949 A1 WO 2024042949A1
Authority
WO
WIPO (PCT)
Prior art keywords
facing
mounting surface
mounting
coil component
surface facing
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/JP2023/026909
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
昌史 宮本
廣大 岩浅
太朗 辻林
亮 奈良原
正護 床井
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.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
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 Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Priority to JP2024542668A priority Critical patent/JPWO2024042949A1/ja
Priority to CN202380061058.4A priority patent/CN119744426A/zh
Priority to DE112023002701.3T priority patent/DE112023002701T5/de
Publication of WO2024042949A1 publication Critical patent/WO2024042949A1/ja
Priority to US19/058,958 priority patent/US20250191835A1/en
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
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H01F27/292—Surface mounted devices
    • 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
    • H01F17/045—Fixed inductances of the signal type with magnetic core with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of leads
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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

Definitions

  • the present invention relates to a wire-wound coil component having a structure in which a wire is wound around a core, and particularly to a form of a metal terminal made of a metal plate attached to the core.
  • Patent Document 1 Japanese Patent Application Publication No. 2006-4989 (Patent Document 1) describes a wire-wound coil component having a structure in which a wire is wound around a core. More specifically, the core has a winding core extending in the axial direction and a pair of flanges provided at opposite ends of the winding core in the axial direction. A metal terminal made of a metal plate is attached to each collar. A wire is wound around the winding core, and the wire is connected to a metal terminal.
  • the flange connects the mounting surface facing the mounting board side, the top surface facing the opposite side of the mounting surface, and the mounting surface and the top surface during mounting. It has an inner end surface on which the end of the core portion in the axial direction is located, and an outer end surface facing opposite to the inner end surface.
  • the metal terminal has a mounting surface facing portion, an outer end surface facing portion, and a top surface facing portion that respectively face the mounting surface, the outer end surface, and the top surface of the flange, and is connected to It continues to the outer end face facing part, and from the outer end face facing part to the top face facing part via the bending part.
  • At least one of the angle between the outer end surface and the mounting surface of the flange and the angle between the outer end surface and the top surface is an acute angle, so that the mounting surface facing part and the top surface are opposite to each other.
  • the flange is sandwiched between the metal terminal and the flange, making it difficult for the metal terminal to come off from the flange.
  • Patent Document 1 a concave portion with a circular opening is provided on the mounting surface and the top surface of the flange, and a convex portion with a spherical surface is provided on the mounting surface facing portion and the top surface facing portion of the metal terminal.
  • the two directions are positive and negative with respect to the axial direction of the winding core (hereinafter also referred to as the "L direction”), and the direction perpendicular to the L direction, and the direction connecting the mounting surface and the top surface (hereinafter referred to as the "T direction”). ), and the direction in which the mounting surface and the top surface extend (hereinafter also referred to as the "W direction”). Therefore, in order to prevent the metal terminal from coming off the collar, it is necessary to withstand external forces in these six directions. Note that an external force directed from the mounting surface toward the top surface in the T direction does not normally occur when the coil component is mounted on the mounting board, so it may be excluded from consideration.
  • each of the pair of metal terminals has a mounting surface facing portion, an outer end surface facing portion, and a top surface facing portion, so that in the mounted state, there are two positive and negative polarities in the T direction. It is thought that external forces in four directions, ie, two positive and negative directions in the L direction and the L direction, can be sufficiently withstood because a specific surface of the metal terminal and a specific surface of the flange portion come into contact with each other.
  • an object of the present invention is to provide a coil component having a structure that can further reduce the ease with which the metal terminal comes off from the flange, compared to the technology described in Patent Document 1.
  • the present invention includes a core having a winding core extending in the axial direction and a pair of flanges provided at mutually opposite ends of the winding core in the axial direction;
  • the present invention is directed to a coil component that includes a pair of metal terminals made of two metal plates, and a wire connected to each of the pair of metal terminals and wound around a winding core.
  • Each flange connects the mounting surface facing the mounting board side, the top surface facing the opposite side of the mounting surface, and the mounting surface and the top surface during mounting. an inner end surface on which an end in the axial direction of the winding core is located, an outer end surface facing opposite to the inner end surface, and a first side surface and a second side surface that connect the inner end surface and the outer end surface and face in opposite directions. and has.
  • each metal terminal has a mounting surface facing portion facing the mounting surface, an outer end surface, a mounting surface facing portion facing the first side surface, and a first side surface facing the second side surface, an outer end surface facing portion, and a first side surface facing portion facing the first side surface. It is characterized by having a section and a second side facing section.
  • external forces in at least five directions including two positive and negative directions in the L direction, two positive and negative directions in the W direction, and a direction from the top surface toward the mounting surface in the T direction are This can be withstood by surface-to-surface contact. Therefore, it is possible to sufficiently withstand external forces in at least the five directions mentioned above so that the metal terminal does not come off the flange, and the metal terminal is less likely to come off from the flange compared to the technology described in Patent Document 1. can be further reduced.
  • FIG. 1 is a perspective view showing the appearance of a coil component 1 according to a first embodiment of the present invention, with mounting surfaces 7 and 8 facing upward.
  • FIG. 2 is a perspective view showing a mounted state of the coil component 1 shown in FIG. 1.
  • FIG. 3 is a perspective view for explaining a typical external force exerted on the coil component 1 in the mounted state shown in FIG. 2.
  • FIG. 3 is a perspective view for explaining an external force in the rotational direction that is applied to the coil component 1 in the mounted state shown in FIG. 2.
  • FIG. FIG. 7 is a perspective view showing the appearance of a coil component 1a according to a second embodiment of the present invention, with mounting surfaces 7 and 8 facing upward.
  • FIG. 7 is a perspective view showing the appearance of a coil component 1b according to a third embodiment of the present invention, with mounting surfaces 7 and 8 facing upward.
  • FIG. 7 is a perspective view showing the appearance of a coil component 1c according to a fourth embodiment of the present invention, with mounting surfaces 7 and 8 facing upward.
  • FIG. 7 is a perspective view showing the appearance of a coil component 1d according to a fifth embodiment of the present invention, with mounting surfaces 7 and 8 facing upward.
  • a coil component 1 according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 4.
  • the coil component 1 includes a winding core 2 extending in the axial direction (L direction), and a pair of flanges provided at mutually opposite ends of the winding core 2 in the L direction, that is, first flanges. 3 and a drum-shaped core 5 having a second flange 4.
  • the core 5 is made of a magnetic material such as ferrite, a resin containing ferrite powder or metal magnetic powder, or a non-magnetic material such as alumina.
  • the winding core 2 has a substantially square cross-sectional shape in the drawings, it may also have a polygonal shape such as a hexagonal shape, a circular shape, an elliptical shape, or a combination thereof.
  • the first flange 3 connects a mounting surface 7 that faces the mounting board 6 (see FIG. 2) side during mounting, a top surface 9 that faces the opposite side of the mounting surface 7, and the mounting surface 7 and the top surface 9.
  • the inner end surface 11 faces the winding core 2 side and positions the end of the winding core 2 in the L direction
  • the outer end surface 13 faces the opposite side of the inner end surface 11, and the inner end surface 11. It has a first side surface 15 and a second side surface 17 that connect the outer end surface 13 and face in opposite directions.
  • the second flange 4 connects the mounting surface 8 facing the mounting board 6 side, the top surface 10 facing the opposite side of the mounting surface 8, and the mounting surface 8 and the top surface 10 during mounting.
  • the dimensions of the core 5 are not limited, but as an example, the dimension in the L direction is 3.2 mm, which is a direction perpendicular to the L direction and in the direction in which the mounting surfaces 7 and 8 and the top surfaces 9 and 10 extend.
  • the dimension in the direction (W direction) is 2.5 mm
  • the dimension in the direction (T direction) connecting the mounting surfaces 7 and 8 and the top surfaces 9 and 10 is 1.8 mm.
  • the coil component 1 constitutes a wire-wound inductor, for example, and includes a wire 21 wound around the winding core portion 2 of the core 5.
  • the wire 21 includes, for example, a center wire made of a highly conductive metal such as copper, silver, or gold, and an insulating coating made of an electrically insulating resin such as polyamideimide, polyurethane, or polyesterimide that covers the center wire.
  • the diameter of the center wire of the wire 21 does not matter, it is preferable to use one having a diameter of 80 ⁇ m or more and 200 ⁇ m or less, for example.
  • the number of turns of the wire 21 on the winding core 2 does not matter.
  • a pair of metal terminals 23 and 24 are attached to the flanges 3 and 4. More specifically, the first metal terminal 23 is attached to the first flange 3 , and the second metal terminal 24 is attached to the second flange 4 .
  • the mutually opposite first and second ends of the wire 21 described above are connected to the first metal terminal 23 and the second metal terminal 24, respectively.
  • the first metal terminal 23 and the second metal terminal 24 are each made of a single metal plate, and have substantially the same shape or a point-symmetrical shape.
  • the metal plates constituting the metal terminals 23 and 24 for example, a plate formed by Ni plating and Sn plating on a base material made of phosphor bronze is used.
  • the first metal terminal 23 includes a mounting surface facing portion 25, an outer end surface facing portion 27, and a first side surface facing portion 25 facing the mounting surface 7, the outer end surface 13, the first side surface 15, and the second side surface 17 of the first collar portion 3, respectively. portion 29 and a second side facing portion 31 .
  • the second metal terminal 24 includes a mounting surface facing portion 26, an outer end surface facing portion 28, and a first side surface facing portion 26 facing the mounting surface 8, the outer end surface 14, the first side surface 16, and the second side surface 18 of the second collar portion 4, respectively. portion 30 and a second side facing portion 32 .
  • the outer end surface facing portion 27 is continuous from the mounting surface facing portion 25 via the first bent portion 33, and the first side surface facing portion 29 and the second side surface facing portion 31 are It continues from the mounting surface facing portion 25 via the second bent portion 35 .
  • the outer end face facing part 28 is continuous from the mounting surface facing part 26 via the first bent part 34, and the first side facing part 30 and the second side facing part 32 are connected to the mounting surface facing part 26. It continues from the opposing portion 26 via the second bent portion 36 .
  • the first end and the second end of the wire 21 are connected to the mounting surface facing portion 25 of the first metal terminal 23 and the mounting surface facing portion 26 of the second metal terminal 24, respectively, by thermocompression bonding, for example. .
  • the coil component 1 is mounted with metal terminals 23 and 24 connected to conductive lands 37 and 38 provided on the mounting board 6 via solder.
  • FIG. 2 shows a fillet 39 formed by solder that connects the conductive land 37 and the first metal terminal 23. As shown in FIG.
  • a top plate 40 is provided on the coil component 1 so as to connect the top surface 9 of the first flange 3 of the core 5 and the top surface 10 of the second flange 4.
  • the top plate 40 is bonded to the core 5 with an adhesive.
  • the adhesive for example, a thermosetting epoxy resin is used.
  • Inorganic fillers such as silica fillers may be added to the adhesive to improve its thermal shock resistance.
  • Examples of adhesive application methods include a printing method in which the adhesive is applied to the top plate 40, a method in which the top surfaces 9 and 10 sides of the flanges 3 and 4 of the core 5 are dipped in adhesive, and a method in which the adhesive is applied to the top plate 40 and the core 5.
  • a method such as dispensing adhesive on both sides can be adopted.
  • the material for the top plate 40 for example, a magnetic material such as ferrite, a resin containing ferrite powder or metal magnetic powder, or a non-magnetic material such as alumina is used.
  • a resin coating may be applied. Note that the top plate 40 and the resin coating may not be provided.
  • the first flange portion 3 resists the external force in the direction from the top surfaces 9 and 10 toward the mounting surfaces 7 and 8 in the T direction.
  • the resistance can be maintained by the contact between the mounting surface 7 and the mounting surface facing portion 25 of the first metal terminal 23 and the contact between the mounting surface 8 of the second collar portion 4 and the mounting surface facing portion 26 of the second metal terminal 24. can.
  • the metal terminals 23 and 24 can withstand external forces in at least the five directions described above without coming off from the flanges 3 and 4.
  • This embodiment has a structure that makes it even more difficult for the metal terminals 23 and 24 to come off from the flanges 3 and 4. That is, the metal terminals 23 and 24 further include a regulating part for regulating the movement of at least the mounting surface facing parts 25 and 26 in a direction away from the mounting surfaces 7 and 8 with respect to the collar parts 3 and 4.
  • the external forces directed from the mounting surfaces 7 and 8 toward the top surfaces 9 and 10 in the T direction are normally applied when the coil component 1 is mounted on the mounting board. Although this does not occur, it may occur instantaneously due to the impact of a fall, etc.
  • the above-mentioned regulating portion is effective against external forces acting on the core 5 from the mounting surfaces 7 and 8 toward the top surfaces 9 and 10 in the T direction.
  • the regulating portion includes a first convex portion 41 provided on at least one of the first side surface 15 and the second side surface 17 of the first collar portion 3, and the first metal terminal 23.
  • a notch 42 is located on at least one of the first side facing portion 29 and the second side facing portion 31 of the terminal 23 and receives the first convex portion 41.
  • the regulating portion includes the first convex portion 43 provided on at least one of the first side surface 16 and the second side surface 18 of the second collar portion 4 and the first convex portion 43 of the second metal terminal 24 .
  • a notch 44 is located on at least one of the side facing portion 30 and the second side facing portion 32 and receives the first convex portion 43.
  • the first metal terminal 23 receives a relatively large external force.
  • a large area can be secured for the outer end surface facing portion 27 and the mounting surface facing portion 25 of the metal terminal 23.
  • the same can be said of the notch portion 44 in the second metal terminal 24. Therefore, the effect of making it difficult for the metal terminals 23 and 24 to come off from the flanges 3 and 4 can be further enhanced.
  • the first convex portion 41 is provided on both the first side surface 15 and the second side surface 17 of the first collar portion 3, and the notch portion 42 is provided on the first metal terminal 23. It is located on both the first side facing portion 29 and the second side facing portion 31 of 23.
  • the second metal terminal 24 the first convex portion 43 is provided on both the first side surface 16 and the second side surface 18 of the second collar portion 4
  • the notch portion 44 is provided on the first side surface 16 and the second side surface 18 of the second collar portion 4 . It is located on both the first side facing portion 30 and the second side facing portion 32.
  • the first convex portion 41 is provided on both the first side surface 15 and the second side surface 17 of the first collar portion 3, and the first convex portion 43 is provided on both the first side surface 16 and the second side surface of the second collar portion 4.
  • the metal terminals 23 and 24 are difficult to come off from the flanges 3 and 4, and the effect can be further enhanced.
  • the mounting surface facing portions 25 and 26 not only move in the direction away from the mounting surfaces 7 and 8, but also in the outer end surface. Movement of the opposing parts 27 and 28 in the direction away from the outer end surfaces 13 and 14 can also be restricted.
  • the first convex portion 41 has a first rising wall 45 extending along the direction in which the top surface 9 of the first collar portion 3 and the mounting surface 7 face each other, and the outer end surface 13 and a second rising wall 46 extending along the direction in which the inner end surface 11 and the inner end surface 11 face each other, and the cutout portion 42 faces the first opposing wall 47 that faces the first rising wall 45 and the second rising wall 46.
  • a second opposing wall 48 is provided.
  • the first convex portion 43 has a first rising wall 49 extending along the direction in which the top surface 10 of the second collar portion 4 and the mounting surface 8 face each other, and the outer end surface 14 and the inner end surface. 12 and a second rising wall 50 extending along the opposite direction, the cutout portion 44 provides a first opposing wall 51 facing the first rising wall 49 and a second opposing wall 50 facing the second rising wall 50.
  • a wall 52 is provided.
  • the first rising walls 45 and 49 extend linearly in parallel with the inner end surfaces 11 and 12, respectively, and the second rising walls Preferably, 46 and 50 extend linearly parallel to mounting surfaces 7 and 8, respectively.
  • the first convex portion 41 is connected to the outer end surface 13 and the mounting surface at the first side surface 15 and the second side surface 17.
  • the notch portion 42 is located so as to be in contact with the corner where the first metal terminal 23 intersects with the inner end surface 11 side of the first side facing portion 29 and the second side facing portion 31 of the first metal terminal 23 and the top surface 9. It is located at a predetermined distance from the side edge.
  • the first side facing portion 29 and the second side facing portion 31 have an L-shape that is biased toward the inner end surface 11 side and the top surface 9 side.
  • the first convex portion 43 is connected to the outer end surface 14 on the first side surface 16 and the second side surface 18.
  • the notch portion 44 is located so as to be in contact with the corner where the surface 8 intersects, and the notch portion 44 is located at the edge of the first side surface facing portion 30 and the second side surface facing portion 32 of the second metal terminal 24 on the inner end surface 12 side and the top surface. It is located at a predetermined distance from the edge on the 10 side.
  • the first side facing portion 30 and the second side facing portion 32 have an L-shape that is biased toward the inner end surface 12 side and the top surface 10 side.
  • the area of each of the first protrusions 41 and 43 can be increased. Further, the rising walls along the mounting surfaces 7 and 8 in the first convex portions 41 and 43 are flush with the mounting surfaces 7 and 8, and the rising walls along the outer end surfaces 13 and 14 in the first convex portions 41 and 43 are on the outer end surface. Since it is flush with 13 and 14, it becomes easy to mold the core 5 including the first protrusions 41 and 43.
  • the first flange 3 also includes a second convex portion 53 that faces at least a portion of the edge of the first metal terminal 23 on the top surface 9 side in a direction in which the top surface 9 and the mounting surface 7 face each other.
  • the second flange 4 further includes a second protrusion that faces at least a portion of the edge of the second metal terminal 24 on the top surface 10 side in a direction in which the top surface 10 and the mounting surface 8 face each other. It is preferable to further include a section 54.
  • the external force R1 in the rotational direction is generated around an axis oriented in the W direction
  • the external force R2 in the rotational direction is generated around an axis oriented in the L direction.
  • the external force R1 is caused by, for example, the difference in thermal expansion between the core 5 and the mounting board 6 when a temperature change occurs in a state where the coil components 1 and the mounting board 6 are mounted. This may occur because the mounting board 6 thermally expands more than the core 5.
  • the second convex portion 53 is provided across the first side surface 15, the outer end surface 13, and the second side surface 17 of the first collar portion 3, and the second convex portion 54 is provided over the first side surface 15, the outer end surface 13, and the second side surface 17 of the first collar portion 3. It is provided over the side surface 16, the outer end surface 14, and the second side surface 18.
  • the second convex portion 53 is located at the end of the first side surface facing portion 29 and the second side surface facing portion 31 of the first metal terminal 23 on the top surface 9 side.
  • the second convex portion 54 is provided so as to face the edge of the first side surface facing portion 30 and the second side surface facing portion 32 of the second metal terminal 24 on the top surface 10 side. Being present is effective.
  • outer end surfaces 27 and 28 of the metal terminals 23 and 24 may form a step on the outer end surfaces 13 and 14 side of the flanges 3 and 4, but the outer end surfaces 13 and 14 of the second convex portions 53 and 54 The portion located at contributes to eliminating or reducing such a level difference. Therefore, for example, it is possible to prevent the tip of a tweezers from getting stuck between the opposing outer end surfaces 27 and 28 of the metal terminals 23 and 24 and the outer end surfaces 13 and 14 of the flanges 3 and 4. can.
  • FIG. 5 is a diagram corresponding to FIG. 1 , showing a coil component 1d according to an embodiment of the present invention.
  • elements corresponding to the elements shown in FIG. 1 or elements corresponding to each other between FIGS. 5 to 8 are given the same reference numerals, and redundant explanation will be omitted.
  • the coil component 1a shown in FIG. 5 differs from the coil component 1 shown in FIG. 1 in the shape and bending manner of the metal plates that constitute each of the metal terminals 23a and 24a.
  • the outer end surface facing portion 27 is continuous from the mounting surface facing portion 25 via the first bent portion 55, and the first side surface facing portion 29 and the second side surface facing portion 31 are connected to each other via the first bent portion 55. , respectively, are continuous from the outer end face facing portion 27 via the second bent portion 57.
  • the outer end surface facing portion 28 is continuous from the mounting surface facing portion 26 via the first bent portion 56, and the first side surface facing portion 30 and the second side surface facing portion 32 are respectively It continues from the outer end surface facing portion 28 via the second bent portion 58 .
  • the coil component 1b shown in FIG. 6 can be seen as a modification of the coil component 1a shown in FIG. 5 with respect to the metal terminals 23b and 24b.
  • the mounting surface facing portion 25 includes a first mounting surface facing end 61 on the first side surface 15 side, a second mounting surface facing end portion 63 on the second side surface 17 side, and a mounting surface facing central part 65 sandwiched between a first mounting surface facing end 61 and a second mounting surface facing end 63, and these first mounting surface facing end 61 and second mounting surface facing end 63.
  • 63 and the mounting surface facing central portion 65 are continuous to the outer end surface facing portion 27 via the first bent portion 55 .
  • the mounting surface facing portion 26 includes a first mounting surface facing end 62 on the first side surface 16 side, a second mounting surface facing end portion 64 on the second side surface 18 side, and a first mounting surface facing end portion 64 on the second side surface 18 side. It is divided into a mounting surface facing central part 66 sandwiched between a mounting surface facing end part 62 and a second mounting surface facing end part 64, and these first mounting surface facing end part 62, second mounting surface facing end part 64 and mounting The surface facing central portion 66 is continuous with the outer end surface facing portion 28 via the first bent portion 56 .
  • solder is applied to central portions 65 and 66 of the metal terminals 23b and 24b facing the mounting surface.
  • the first end of the wire 21 is connected to one of the first mounting surface facing end 61 and the second mounting surface facing end 63, for example, the first mounting surface facing end 61.
  • the second end of the wire 21 is connected to one of the first mounting surface facing end 62 and the second mounting surface facing end 64, for example, the second mounting surface facing end 64. be done.
  • the mounting surface facing central portions 65 and 66 to which solder is applied during mounting, and the first mounting surface facing end portion to which the wire 21 may be connected. 61 and 26 or the second mounting surface opposing ends 63 and 64 are separated from each other. Therefore, the first mounting surface facing ends 61 and 62 or the second mounting surface facing ends 63 and 64 are less susceptible to the effects of loads such as heat and stress exerted on the mounting surface facing central parts 65 and 66, and the first mounting surface facing ends 63 and 64 are The mounting surface facing central portions 65 and 66 can be made less susceptible to loads such as heat and stress applied to the surface facing ends 61 and 62 or the second mounting surface facing ends 63 and 64. Therefore, the connection reliability between the mounting board and the metal terminals 23b and 24b and the connection reliability between the metal terminals 23b and 24b and the wire 21 can be improved.
  • the coil component 1c shown in FIG. 7 can be seen as a modification of the coil component 1b shown in FIG. 6 with respect to the metal terminals 23c and 24c.
  • the first metal terminal 23c as in the case of the coil component 1b shown in FIG. It is divided into a second mounting surface facing end portion 63 on the side surface 17 side, and a mounting surface facing central portion 65 sandwiched between the first mounting surface facing end portion 61 and the second mounting surface facing end portion 63.
  • the mounting surface facing center portion 65 is connected to the outer end surface facing portion 27 via the first bent portion 55, but the first mounting surface facing end portion 61 and the second mounting surface facing end portion 63 are respectively , are connected to the first side facing portion 29 and the second side facing portion 31 via the third bent portion 67.
  • the mounting surface facing portion 26 includes a first mounting surface facing end 62 on the first side surface 16 side, a second mounting surface facing end portion 64 on the second side surface 18 side, and a first mounting surface facing end portion 64 on the second side surface 18 side. It is divided into a mounting surface facing central portion 66 sandwiched between a mounting surface facing end portion 62 and a second mounting surface facing end portion 64 .
  • the mounting surface facing central portion 66 is connected to the outer end surface facing portion 28 via the first bent portion 56, but the first mounting surface facing end portion 62 and the second mounting surface facing end portion 64 are respectively , are connected to the first side facing portion 30 and the second side facing portion 32 via the third bent portion 68.
  • the first end of the wire 21 is connected to one of the first mounting surface facing end 61 and the second mounting surface facing end 63, for example, the first mounting surface facing end 61.
  • the second end of the wire 21 is connected to one of the first mounting surface facing end 62 and the second mounting surface facing end 64, for example, the second mounting surface facing end 64. be done.
  • the mounting surface facing ends 61 to 64 are separated from each other. However, in the coil component 1c shown in FIG. 7, the mounting surface facing ends 61 to 64 are connected to the outer end surface facing parts 27 and 28 via the side surface facing parts 29 to 32, so Compared to the coil component 1b, the mounting surface facing ends 61 to 64 are less susceptible to the effects of loads such as heat and stress applied to the mounting surface facing central parts 65 and 66, and the mounting surface facing ends 61 to 64 are less affected.
  • the central portions 65 and 66 facing the mounting surface are less susceptible to loads such as heat and stress caused by the mounting surface. Therefore, the connection reliability between the mounting board and the metal terminals 23c and 24c, and the connection reliability between the metal terminals 23c and 24c and the wire 21 can be further improved compared to the coil component 1b shown in FIG.
  • the coil component 1d shown in FIG. 8 is different from the coil component 1a shown in FIG. 5 in the positions of the first convex portions 41d and 43d.
  • the first convex portion 43 is positioned so as to be in contact with the corner where the outer end surface 14 and the mounting surface 8 intersect on the first side surface 16 and the second side surface 18 of the second collar portion 4. It was done.
  • the first convex portion 43d is located away from the corner where the outer end surface 14 and the mounting surface 8 intersect on the first side surface 16 and the second side surface 18 of the second collar portion 4.
  • first protrusions 41d and 43d are substantially the same as the functions of the first protrusions 41 and 43.
  • a restriction portion that restricts movement of the metal terminals 23 and 24 with respect to the collar portions 3 and 4 in a direction in which at least the mounting surface facing portions 25 and 26 move away from the mounting surfaces 7 and 8 is not essential in the present invention.
  • the regulating portion is provided, even if it is provided in relation to only one of the first side surface 15 and the second side surface 17 of the first collar portion 3, the first side surface 16 and the second side surface of the second collar portion 4 It may be provided in connection with only one of 18.
  • fixing with adhesive is not essential in this invention. Note that fixing with adhesive may encounter the following problems.
  • the advantage of metal terminals is that due to the springiness of the metal plate, even if some external force is applied, the metal terminal itself flexes to release the stress and prevent breakage.
  • the more firmly the metal terminal is fixed with adhesive the less the springiness of the metal plate can be utilized. In other words, it becomes vulnerable to the development of solder cracks during long-term reliability tests and to deflection tests.
  • Adhesives are usually sensitive to heat and lose their adhesive function after being exposed to heat of about 300°C for just a few minutes. However, when manufacturing coil parts using conventional metal terminals, it is necessary to connect the wires to the metal terminals using heat after attaching the metal terminals to the core, so heat is applied to the adhesive. cannot be avoided.
  • fixing with adhesive is not essential when attaching the metal terminals 23 and 24 to the flanges 3 and 4, so it is not necessary to apply sufficient heat when connecting the wires to the metal terminals. It is possible. Therefore, a relatively thick wire can be used in the coil component. Note that this invention does not exclude the use of adhesives. Furthermore, in configuring the coil component according to the present invention, partial substitution of the configuration between the different embodiments described in this specification is possible. Or a combination is possible.
  • Embodiments of this invention include the following.
  • a core having a winding core extending in the axial direction and a pair of flanges provided at mutually opposite ends of the winding core in the axial direction; a pair of metal terminals each made of a single metal plate attached to each of the flanges; a wire connected to each of the pair of metal terminals and wound around the winding core; Equipped with Each of the flange portions connects a mounting surface facing the mounting board during mounting, a top surface facing the opposite side of the mounting surface, and the mounting surface and the top surface, and connects the mounting surface and the top surface.
  • Each of the metal terminals has a mounting surface facing portion, an outer end surface facing portion, a first side facing portion, and a second side facing portion facing the mounting surface, the outer end surface, the first side surface, and the second side surface, respectively. , coil parts.
  • the outer end surface facing portion is connected to the mounting surface facing portion via a first bent portion, and the first side facing portion and the second side facing portion are connected to the mounting surface facing portion via a second bent portion.
  • the outer end surface facing part is connected to the mounting surface facing part via a first bent part, and the first side facing part and the second side facing part are connected to each other from the outer end face facing part via a second bent part.
  • the mounting surface facing portion includes a first mounting surface facing end on the first side surface side, a second mounting surface facing end portion on the second side surface side, and the first mounting surface facing end portion and the second mounting surface. It is divided into a central part facing the mounting surface sandwiched between the opposite ends. The first mounting surface facing end, the second mounting surface facing end, and the mounting surface facing central portion are continuous to the outer end surface facing portion via the first bending portion.
  • the metal terminal further includes a regulating part for regulating movement of at least the mounting surface facing part in a direction away from the mounting surface with respect to the collar part. coil parts.
  • the regulating portion includes a first convex portion provided on at least one of the first side surface and the second side surface of each of the pair of collar portions, and a portion facing the first side surface and the second side surface of the metal terminal.
  • the coil component according to ⁇ 5> which is provided by a notch portion located on at least one of the opposing portions and receiving each of the first convex portions.
  • the restriction portion restricts movement of the mounting surface facing portion not only in a direction away from the mounting surface but also in a direction in which the outer end surface facing portion moves away from the outer end surface.
  • the first convex portion includes a first rising wall extending in a direction in which the top surface and the mounting surface face each other, and a second rising wall extending in a direction in which the outer end face and the inner end face face each other.
  • the first rising wall When viewed toward each of the first side surface and the second side surface, the first rising wall extends in a straight line parallel to the inner end surface, and the second rising wall extends in a straight line parallel to the mounting surface.
  • the coil component according to ⁇ 8> which extends in a shape.
  • the first convex portion When viewed toward each of the first side surface and the second side surface, the first convex portion is located on the outer side of at least one of the first side surface and the second side surface of each of the pair of collar portions. located so as to be in contact with a corner where the end face and the mounting surface intersect, The cutout portion is located at a predetermined distance from an edge on the inner end surface side and an edge on the top surface side of at least one of the first side facing portion and the second side facing portion of the metal terminal. be done, The coil component according to any one of ⁇ 6> to ⁇ 9>.
  • each of the pair of collar portions further includes a second convex portion facing at least a part of the edge on the top surface side of the metal terminal. parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Coils Or Transformers For Communication (AREA)
PCT/JP2023/026909 2022-08-23 2023-07-22 コイル部品 Ceased WO2024042949A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2024542668A JPWO2024042949A1 (https=) 2022-08-23 2023-07-22
CN202380061058.4A CN119744426A (zh) 2022-08-23 2023-07-22 线圈部件
DE112023002701.3T DE112023002701T5 (de) 2022-08-23 2023-07-22 Spulenbauteil
US19/058,958 US20250191835A1 (en) 2022-08-23 2025-02-20 Coil component

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022132155 2022-08-23
JP2022-132155 2022-08-23

Related Child Applications (1)

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US19/058,958 Continuation US20250191835A1 (en) 2022-08-23 2025-02-20 Coil component

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WO2024042949A1 true WO2024042949A1 (ja) 2024-02-29

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JP (1) JPWO2024042949A1 (https=)
CN (1) CN119744426A (https=)
DE (1) DE112023002701T5 (https=)
WO (1) WO2024042949A1 (https=)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0425210U (https=) * 1990-06-20 1992-02-28
JPH05308024A (ja) * 1992-03-05 1993-11-19 Matsushita Electric Ind Co Ltd チップ形ノイズ除去フィルタおよびその製造方法
JPH10172832A (ja) * 1996-12-11 1998-06-26 Taiyo Yuden Co Ltd 巻線型電子部品
JP2010093063A (ja) * 2008-10-08 2010-04-22 Tdk Corp 金属圧粉コイル部品
WO2016136338A1 (ja) * 2015-02-27 2016-09-01 東光株式会社 表面実装インダクタ及びその製造方法
JP2017212352A (ja) * 2016-05-26 2017-11-30 株式会社村田製作所 コイル部品
JP2018133355A (ja) * 2017-02-13 2018-08-23 株式会社村田製作所 積層セラミック電子部品
JP2020120088A (ja) * 2019-01-28 2020-08-06 Tdk株式会社 コイル部品

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0425210U (https=) * 1990-06-20 1992-02-28
JPH05308024A (ja) * 1992-03-05 1993-11-19 Matsushita Electric Ind Co Ltd チップ形ノイズ除去フィルタおよびその製造方法
JPH10172832A (ja) * 1996-12-11 1998-06-26 Taiyo Yuden Co Ltd 巻線型電子部品
JP2010093063A (ja) * 2008-10-08 2010-04-22 Tdk Corp 金属圧粉コイル部品
WO2016136338A1 (ja) * 2015-02-27 2016-09-01 東光株式会社 表面実装インダクタ及びその製造方法
JP2017212352A (ja) * 2016-05-26 2017-11-30 株式会社村田製作所 コイル部品
JP2018133355A (ja) * 2017-02-13 2018-08-23 株式会社村田製作所 積層セラミック電子部品
JP2020120088A (ja) * 2019-01-28 2020-08-06 Tdk株式会社 コイル部品

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JPWO2024042949A1 (https=) 2024-02-29
DE112023002701T5 (de) 2025-04-03
CN119744426A (zh) 2025-04-01

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