WO2015115024A1 - コイル部品 - Google Patents
コイル部品 Download PDFInfo
- Publication number
- WO2015115024A1 WO2015115024A1 PCT/JP2015/000025 JP2015000025W WO2015115024A1 WO 2015115024 A1 WO2015115024 A1 WO 2015115024A1 JP 2015000025 W JP2015000025 W JP 2015000025W WO 2015115024 A1 WO2015115024 A1 WO 2015115024A1
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- WIPO (PCT)
- Prior art keywords
- bent
- coil component
- external electrodes
- pair
- external electrode
- Prior art date
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- 239000000696 magnetic material Substances 0.000 claims abstract description 5
- 229910000679 solder Inorganic materials 0.000 claims description 43
- 238000005452 bending Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 238000005476 soldering Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
-
- 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
-
- 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
-
- 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
- H01F2017/048—Fixed inductances of the signal type with magnetic core with encapsulating core, e.g. made of resin and magnetic powder
Definitions
- the present invention relates to a coil component used for various electronic devices, and more particularly to a coil component used for a large current application.
- FIG. 16 is a side sectional view when a conventional coil component is mounted on a mounting board.
- the conventional coil component has a coil part 1, a magnetic core 2, and a terminal part 3.
- the magnetic core 2 is formed by covering the coil part 1 with a mixture of magnetic material powder and an insulating binder and press-molding it.
- the terminal portion 3 is electrically connected to the coil portion 1 and is bent along the bottom surface from the side surface of the magnetic core 2.
- solder 5 for example, Patent Document 1).
- the present invention provides a coil component having excellent vibration resistance even when the shape is increased.
- the coil component of the present invention includes a coil portion, an exterior body, and a pair of external electrodes.
- the exterior body is made of a magnetic material and has a coil portion embedded therein.
- the exterior body includes a bottom surface, a top surface that is located on the opposite side of the bottom surface and provided with a notch, a first side surface, and a second side surface opposite to the first side surface.
- the pair of external electrodes extends from both ends of the coil portion, is pulled out from the first side surface of the exterior body, is bent toward the bottom surface at the first folding portion, along the first side surface, and further toward the second side surface. 2 is bent along the bottom and is along the bottom surface.
- the pair of external electrodes is further bent at the third bent portion toward the top surface along the second side surface, and further bent at the fourth bent portion toward the notch portion on the top surface and locked to the notch portion.
- a concave portion is provided in a portion of the bottom surface overlapping each of the pair of external electrodes.
- Each of the pair of external electrodes has a protrusion that is bent so as to protrude toward the inside of the corresponding recess.
- a notch having an opening extending between the first side surface and the bottom surface is provided inside the second bent portion, and an opening extending between the bottom surface and the second side surface is formed inside the third bent portion.
- a notch is provided. The tops of the second bent part and the third bent part inside each notch are bent into a curved shape.
- the external electrode is formed from the end of the bottom surface to the end, and the external electrode is bent toward the concave portion, so that the exterior body and the external electrode can be brought into close contact with each other. Can be improved. Further, when the external electrode is bent, the corner of the exterior body can be prevented from making point contact with the external electrode due to the opening of the notch.
- the curved top portions of the second and third bent portions inside the notch are deformed, and the portion of the external electrode along the bottom surface of the exterior body is the concave portion. Be drawn towards. Therefore, it is easier to tighten the external electrode.
- the coil component corresponding to a large current is large. Therefore, vibration resistance becomes a problem particularly in automotive applications. That is, the coil component shown in FIG. 16 is large. Particularly, when the height is increased, a large stress is applied to the soldered portion when vibration is applied. Therefore, there is a possibility that the mechanical strength of the terminal portion 3 or the soldered portion is lowered.
- FIG. 1 is a bottom perspective view of a coil component according to Embodiment 1
- FIG. 2 is a side view of the coil component shown in FIG.
- the coil component includes a coil portion 11, an exterior body 12, and a pair of external electrodes 34.
- the exterior body 12 is made of a magnetic material and has the coil portion 11 embedded therein.
- the exterior body 12 includes a bottom surface 12B, a top surface 12D that is located on the opposite side of the bottom surface 12B and provided with a notch 33, a first side surface 12A, and a second side surface 12C opposite to the first side surface 12A. And have.
- the pair of external electrodes 34 extends from both ends of the coil portion 11, is pulled out from the first side surface 12A of the exterior body 12, is bent by the first bent portion 44A toward the bottom surface 12B, along the first side surface 12A, and The second bent portion 44B is bent toward the second side surface 12C and extends along the bottom surface 12B.
- the pair of external electrodes 34 are further bent by the third bent portion 44C toward the top surface 12D, along the second side surface 12C, and further bent by the fourth bent portion 44D toward the cutout portion 33 of the top surface 12D. And is locked to the notch 33.
- a recess 15 is provided in a portion of the bottom surface 12B that overlaps each of the external electrodes 34.
- Each external electrode 34 has a protruding portion 30 that is bent so as to protrude toward the inside of the corresponding recess 15.
- a notch 16 having an opening 24 extending between the first side surface 12A and the bottom surface 12B is provided inside the second bent portion 44B.
- a notch 16 having an opening 24 that extends across the bottom surface 12B and the second side surface 12C is provided inside the third bent portion 44C.
- the top portions 25 inside the notches 16 of the second bent portion 44B and the third bent portion 44C are bent into a curved shape.
- the coil portion 11 is formed by winding a conducting wire in a spiral shape, and is formed of, for example, copper whose surface is insulated.
- the exterior body 12 embeds the coil part 11 by mixing the magnetic substance powder with a binder and press-molding it.
- the magnetic powder is, for example, metal powder obtained by pulverizing an alloy of Fe, Si, and Cr.
- the conducting wire is, for example, a round wire having a diameter of about 1.2 mm.
- the exterior body 12 has, for example, a bottom surface with a size of about 13 mm ⁇ 13 mm and a height of about 7 mm.
- Both end portions of the coil portion 11 are both pulled out from the first side surface 12A of the exterior body 12, and are bent toward the bottom surface 12B from the extracted portion (first bent portion 44A). Both end portions of the coil portion 11 are further bent along the bottom surface 12B and the second side surface 12C, and are bent toward the notch portion 33 provided on the top surface 12D. Each tip of the external electrode 34 is locked to the notch 33. Thus, each of the external electrodes 34 traverses the bottom surface 12B from the first side surface 12A to the second side surface 12C.
- each notch 33 is preferably provided with a step 33A closer to the bottom surface 12B than the top surface 12D, and the external electrodes 34 are preferably bent so that their tips are on the step 33A.
- the end of the coil portion 11 is fixed as the external electrode 34 by being bent toward the cutout portion 33 provided on the top surface 12D of the exterior body 12.
- the external electrode 34 and the exterior body 12 are likely to be in point contact at the corners of the exterior body 12. That is, the external electrode 34 is likely to be in contact with the exterior body 12 only at the portion where the first side surface 12A and the bottom surface 12B are in contact and the portion where the bottom surface 12B and the second side surface 12C are in contact.
- the recess 15 is formed in a portion of the bottom surface 12B where the external electrode 34 overlaps, and the external electrode 34 is bent toward the recess 15 to tighten the external electrode 34.
- the external electrode 34 has a protrusion 30 that is bent so as to protrude toward the inside of the recess 15.
- the depth of the recess 15 is about 0.6 mm, for example.
- the external electrode 34 is provided with a notch 16 at least inside the second bent portion 44B and inside the third bent portion 44C among the four bent portions.
- FIGS. 3A to 3C are side views showing examples of various thin portions 23 in the external electrode 34 to be the notches 16.
- the notch 16 is formed by bending the thin portion 23 formed in advance at a position where the external electrode 34 is bent when the round wire of the portion to be the external electrode 34 is pressed. That is, the minimum thickness Ht of the external electrode 34 in the thin portion 23 is smaller than the thickness Gt of other portions.
- an opening 24 is formed inside the notch 16 as shown in FIG.
- the opening 24 in the second bent portion 44B is formed so as to straddle the first side surface 12A and the bottom surface 12B.
- the opening 24 in the third bent portion 44C is formed so as to straddle the bottom surface 12B and the second side surface 12C.
- the top portions 25 inside the notches 16 of the second bent portion 44B and the third bent portion 44C are bent into a curved shape.
- the corner of the outer package 12 enters the opening 24 of the notch 16. Therefore, the external electrode 34 easily comes into contact with the first side surface 12A, the bottom surface 12B, and the second side surface 12C.
- the length Hl of the thin portion 23 in the extending direction of the external electrode 34 is 0.05 times or more and 0.20 times or less the height of the exterior body 12. desirable.
- the height of the exterior body 12 is the distance between the top surface 12D and the bottom surface 12B. The reason for this will be described with reference to FIG. FIG. 4 is a side view of a more preferable coil component in the present embodiment.
- the top 25 of the bent portion inside the notch 16 can be formed in a curved shape. Further, when the length Hl is set to 0.05 times or more and 0.20 times or less of the height of the exterior body 12, the opening 24 becomes large. Therefore, as shown in FIG. 4, even when the height of the exterior body 12 varies, the opening 24 prevents the corners of the exterior body 12 from making point contact with the external electrode 34 when the external electrode 34 is bent. can do. As a result, it is possible to absorb dimensional variations due to pressure molding of the outer package 12.
- the length Hl is smaller than 0.05 times the height of the exterior body 12, it is difficult to form the top 25 in a curved shape.
- the length Hl is larger than 0.20 times the height of the outer package 12, the thin portion of the external electrode 34 increases and the strength of the external electrode 34 decreases.
- the entire bottom surface 12B and the external electrode 34 in close contact with the first side face 12A and the second side face 12C are soldered to the mounting board. Therefore, this coil component is excellent in vibration resistance. Furthermore, since a relatively large amount of solder gathers in the vicinity of the recess 15, it is more advantageous for vibration resistance.
- solder lump 19 formed on the top 25 on the inner side of the notch 16 is fused and integrated with the mounting solder of the mounting substrate, and the external electrode 34 can be fixed from the front and back with the mounting solder. Therefore, it becomes more advantageous for vibration resistance.
- the solder lump 19 is made of solder having a melting point lower than that of the mounting solder.
- the reflow solder and the solder lump 19 are easily melted and integrated.
- solder having a melting point of 215 ° C. or higher and lower than 230 ° C. is used for the mounting substrate. Therefore, the melting point of the solder forming the solder lump 19 is desirably 195 ° C. or higher and lower than 215 ° C.
- the gap 20 may be formed by cutting out a part of the outer package 12 facing the notch 16 in which the solder mass 19 is formed.
- FIG. 5 is an enlarged side view of an essential part showing a state where a coil component having a preferred configuration in the present embodiment is mounted on a mounting board. In this configuration, hot air flows through the gap 20 during reflow soldering, and the solder lump 19 is likely to be warmed. Therefore, the mounting solder 22 and the solder lump 19 of the mounting substrate 21 are easily melted and integrated.
- FIG. 6 is a side view of another coil component in the present embodiment.
- the concave portion 15 When the concave portion 15 is provided, the thickness of the magnetic body forming the exterior body 12 is reduced at that portion, and magnetic saturation is likely to occur. In particular, since the central portion of the bottom surface 12B where the external electrode 34 overlaps is close to the coil portion 11, magnetic saturation is likely to occur in this portion. Therefore, as shown in FIG. 6, it is preferable to provide the concave portions 15 on both sides of the central portion. Thus, by providing the recessed part 15 avoiding a center part, the part where the thickness of a magnetic body becomes thin will be a place far from the coil part 11. FIG. As a result, magnetic saturation is less likely to occur. Further, the force for tightening the external electrode 34 is increased. Thereby, you may make the depth of the recessed part 15 shallow. In addition, magnetic saturation is less likely to occur.
- FIG. 7 is a side view of still another coil component in the present embodiment.
- a recess 35 is formed that is asymmetric with respect to a plane perpendicular to the extending direction of the external electrode 34 (plane of line AA).
- the shape of the recess 35 can be defined as follows.
- a tangent line L1 in contact with the side closer to the first side surface 12A of the concave portion 35 and a tangent line L2 in contact with the closer side to the second side surface 12C are drawn at H / 2.
- the angle between the tangent lines L1 and L2 and the bottom surface 12B is ⁇ 1 near the first side surface 12A and ⁇ 2 near the second side surface 12C, ⁇ 1 ⁇ 2.
- the external electrode 34 is bent toward the concave portion 35 by using the concave portion 35 and a punch having an approximate shape (not shown). Then, the external electrode 34 is firmly sandwiched between the outer body 12 and the punch and is not moved on the ⁇ 1 side with a small angle earlier than the ⁇ 2 side with a large angle. Further, when the punch is pushed into the recess 35, the external electrode 34 on the ⁇ 2 side is drawn into the recess 35, so that the side closer to the second side surface 12C can be tightened more strongly. Thereby, it is possible to further correct the looseness caused by the spring back or the like of the external electrode 34 locked to the notch 33 closer to the second side surface 12C.
- the single recess 15 or recess 35 is provided in the central portion of the bottom surface 12B where the external electrode 34 overlaps. However, it may be provided not in the central portion but closer to the second side surface 12C. Absent. By doing so, the side closer to the second side surface 12C can be tightened more strongly.
- FIG. 8 is a side view of still another coil component in the present embodiment.
- the recess 35A closer to the first side surface 12A is set to ⁇ 1> ⁇ 2
- the recess 35B closer to the second side surface 12C is set to ⁇ 1 ⁇ 2. Since the portion sandwiched between the recesses 35A and 35B is pulled toward both the recesses 35A and 35B, the overall adhesion can be further improved without applying too much force.
- FIG. 9 is a bottom perspective view of still another coil component in the present embodiment.
- the strength against the force in the direction perpendicular to the extending direction of the external electrode 34 (the arrow direction of the BB line) can be improved.
- FIG. 10 is a side view showing the first side surface 12A of the coil component according to the present embodiment.
- the external electrodes 34 are each pulled out from the first side surface 12A of the exterior body 12, and the width W1 of the external electrode 34 in the extracted portion is, for example, about 1.6 mm, and the thickness T is about 0.4 mm. Further, the end of the portion where the external electrode 34 is drawn is at a position (a) that is about 0.5 mm inside from the end of the first side surface 12A. Further, the extracted external electrode 34 is bent toward the bottom surface 12B, and the width W2 of the second bent portion 44B near the bottom surface 12B is about 2.2 mm. If an attempt is made to form a powder with the external electrode 34 pulled out from the exterior body 12, cracks are likely to occur in the exterior body 12 around the external electrode 34. Therefore, it is preferable that the position (a) for drawing the external electrode 34 from the end of the exterior body 12 is larger than the thickness T of the external electrode 34. With this configuration, the occurrence of the cracks described above can be prevented.
- the portion of the external electrode 34 located on the bottom surface 12B is preferably located near the end of the exterior body 12 in consideration of heating during reflow soldering. That is, it is preferable to make the width W2 of the second bent portion 44B near the bottom surface 12B wider than the width W1 of the portion pulled out from the exterior body 12. With this configuration, the external electrode 34 can be formed in the vicinity of the end portion of the exterior body 12 in the second bent portion 44B even if the extracted external electrode 34 is lowered almost straight toward the bottom surface 12B.
- a constricted portion 18 having a width W3 of about 1.8 mm is formed in a portion along the first side surface 12A of the external electrode 34.
- a solder fillet is formed on the side surface of the external electrode.
- the solder fillet also rises to a high position, and the shape tends to vary.
- the provision of the constricted portion 18 makes it difficult for the solder fillet to rise upward from the constricted portion 18, and the shape of the solder fillet can be stabilized.
- it is more desirable that the constricted portion 18 is formed at a position closer to the bottom surface 12B than the central portion 46 in the extending direction of the external electrode 34 on the first side surface 12A.
- FIGS. 11-14 are bottom perspective views of the coil component according to Embodiment 2
- FIG. 12 is a side view of the coil component shown in FIG. 13 is a sectional view taken along line 13-13 in FIG. 12, and
- FIG. 14 is a sectional view taken along line 14-14 in FIG.
- symbol may be attached
- the bottom surface 12 ⁇ / b> B is provided with a stepped portion 17 at a portion in contact with the external electrode 34, and the depth of the central portion side of the stepped portion 17 is deeper than the depth of the side surface side. That is, the stepped portion 17 is higher near the center of the bottom surface 12B than near the third side surface 12E and the fourth side surface 12F.
- the depth d1 on the center side of the bottom surface 12B is about 0.4 mm
- the depth d2 on the side surface side is about 0.2 mm.
- the external electrode 34 is formed in a plate shape by pressing the round wire constituting the coil portion 11, and in the portion of the external electrode 34 that comes into contact with the bottom surface 12 ⁇ / b> B, the central portion side is closer to the side surface side. Also thick. For example, the thickness on the center side is about 0.6 mm, and the thickness on the side surface side is about 0.4 mm. By forming in this way, it becomes difficult for the external electrode 34 to come out with respect to the stress from the center side to the side surface side, and the vibration resistance can be improved.
- the mounting surface can be flattened by making the shape of the external electrode 34 match the stepped portion 17.
- the entire side surface of the external electrode 34 is exposed when viewed from the third side surface 12E which is a side surface orthogonal to the first side surface 12A and the second side surface 12C.
- the recessed part 15 is provided in the level
- the depth of the recess 15 near the center is deeper than the side surface.
- the central portion side of the recess 15 is further about 0.6 mm deeper than the step portion 17, and the side surface side is further about 0.4 mm deeper than the step portion 17.
- the external electrode 34 is tightened by pushing the external electrode 34 toward the recess 15.
- the protruding portion 30 protrudes into the recess 15 closer to the center of the bottom surface 12B than to the third side surface 12E and the fourth side surface 12F.
- the external electrode 34 is reliably in surface contact with the first side surface 12A, the bottom surface 12B, and the second side surface 12C.
- the depth at which the external electrode 34 is pushed into the recess 15 is larger on the center side of the bottom surface 12B than on the third side surface 12E and the fourth side surface 12F side. For example, it is about 0.5 mm on the center side and about 0.3 mm on the side surface side. Therefore, it is difficult for the external electrode 34 to come off with respect to the stress from the center side to the side surface side, and the vibration resistance is further improved.
- variety near the 3rd side surface 12E and the 4th side surface 12F of the recessed part 15 seen from the bottom face 12B is narrower than the width
- the bottom surface 12B is provided with the stepped portion 17 in the entire portion in contact with the external electrode 34 from the first side surface 12A to the second side surface 12C.
- the step portion 17 is provided at least 1/3 or more of the length from the first side surface 12A to the second side surface 12C of the bottom surface 12B, the above-described effects can be obtained.
- the stepped portion 17 may be formed not only on the bottom surface 12B but also on the first side surface 12A and the second side surface 12C.
- FIG. 15 is a side view of another coil component in the present embodiment.
- the effect of providing a plurality of recesses 15 is the same as that of the first embodiment.
- recesses 35A and 35B may be formed as shown in FIG.
- the notch 16 is formed at a position where the external electrode 34 is bent.
- the detailed shape of the notch 16 and the effect thereof are the same as those of the first embodiment.
- the coil component according to the present invention is industrially useful because it has excellent vibration resistance even if it is enlarged.
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- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
Description
図1は実施の形態1におけるコイル部品の底面側斜視図、図2は図1に示すコイル部品の側面図である。このコイル部品は、コイル部11と、外装体12と、一対の外部電極34とを有する。
次に本発明の実施の形態2におけるコイル部品について、図11から図14を参照しながら説明する。図11は実施の形態2におけるコイル部品の底面側斜視図、図12は図11に示すコイル部品の側面図である。また図13は図12の13-13線における断面図、図14は図12の14-14線における断面図である。なお実施の形態1と同じ構成については、同一の符号を付し詳細な説明は省略する場合がある。
12 外装体
12A 第1側面
12B 底面
12C 第2側面
12D 天面
12E 第3側面
12F 第4側面
15,35,35A,35B 凹部
16 ノッチ
17 段差部
18 くびれ部
19 半田塊
20 空隙
21 実装基板
22 実装半田
23 薄肉部
24 開口
25 頂部
30 突出部
33 切欠き部
33A 段部
34 外部電極
44A 第1折り曲げ部
44B 第2折り曲げ部
44C 第3折り曲げ部
44D 第4折り曲げ部
46 中央部
Claims (13)
- コイル部と、
前記コイル部を埋設し、磁性体で構成され、底面と、前記底面の反対側に位置するとともに切欠き部が設けられた天面と、第1側面と、前記第1側面の反対側の第2側面とを有する外装体と、
前記コイル部の両端から延出し、前記第1側面から引き出され、
前記底面に向かって第1折り曲げ部で折り曲げられて前記第1側面に沿い、さらに前記第2側面に向かって第2折り曲げ部で折り曲げられて前記底面に沿い、さらに前記天面に向かって第3折り曲げ部で折り曲げられて前記第2側面に沿い、さらに前記天面の前記切欠き部に向かって第4折り曲げ部で折り曲げられて前記切欠き部に係止された一対の外部電極と、を備え、
前記底面における、前記一対の外部電極のそれぞれと重なる部分に凹部が設けられており、前記一対の外部電極はそれぞれ、対応する前記凹部の内側に向かって突出するように曲げられた突出部を有し、
前記第2折り曲げ部の内側には、前記第1側面と前記底面とにまたがる開口が形成されたノッチが設けられており、
前記第3折り曲げ部の内側には、前記底面と前記第2側面にまたがる開口が形成されたノッチが設けられており、
前記ノッチのそれぞれの内側における前記第2折り曲げ部、前記第3折り曲げ部の頂部が湾曲形状に折り曲げられている、
コイル部品。 - 前記底面における、前記一対の外部電極のそれぞれと重なる部分には、前記凹部を含む複数の凹部が設けられ、
前記一対の外部電極はそれぞれ、前記突出部を含み、対応する前記複数の凹部の内側に向かって突出するように曲げられた複数の突出部を有する、
請求項1記載のコイル部品。 - 前記一対の外部電極の延伸方向に垂直な面に対して、前記凹部の形状が非対称である、
請求項1記載のコイル部品。 - 前記第1側面において、前記一対の外部電極のそれぞれの前記外装体から引き出された部分の幅は、前記第2折り曲げ部の幅よりも小さい、
請求項1記載のコイル部品。 - 前記第1側面において、前記一対の外部電極のそれぞれは、前記外装体から引き出された部分と前記第2折り曲げ部との間に、くびれ部を有する、
請求項4記載のコイル部品。 - 前記くびれ部は、前記第1側面における前記一対の外部電極のそれぞれの延伸方向の中央部よりも前記第2折り曲げ部寄りに形成されている、
請求項5記載のコイル部品。 - 前記外装体は、前記第1側面と前記第2側面との間に第3側面と第4側面とをさらに有し、
前記外装体の底面の前記一対の外部電極と当接する部分には、段差部が設けられており、前記段差部は、前記底面の中央部寄りの方が、前記第3、第4側面寄りよりも高い、
請求項1記載のコイル部品。 - 前記段差部内に前記凹部が設けられており、前記突出部は、前記底面の中央部寄りの方が前記第3、第4側面寄りよりも前記凹部内へ大きく突出している、
請求項7記載のコイル部品。 - 前記一対の外部電極のそれぞれの前記底面に当接する部分では、前記底面の中央部寄りの方が前記第3、第4側面寄りよりも厚い、
請求項7記載のコイル部品。 - 前記一対の外部電極の表面は半田めっきされており、前記ノッチの内側には他の部分よりも厚い半田塊が形成されている、
請求項1記載のコイル部品。 - 前記半田塊を形成する半田の融点は195℃以上、215℃未満である、
請求項10記載のコイル部品。 - 前記半田塊と前記外装体との間に空隙が設けられた、
請求項10記載のコイル部品。 - 前記ノッチは、前記一対の外部電極のそれぞれを折り曲げる前に、少なくとも前記第1側面と前記底面との角部および前記底面と前記第2側面との角部に対応する位置に設けられた薄肉部を折り曲げることにより形成され、
前記外部電極の延伸方向における前記薄肉部の長さは、前記外装体の前記天面と前記底面との間の距離の0.05倍以上、0.20倍以下である、
請求項1記載のコイル部品。
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JP2015559790A JP6413096B2 (ja) | 2014-01-30 | 2015-01-07 | コイル部品 |
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US15/103,430 US9672971B2 (en) | 2014-01-30 | 2015-01-07 | Coil part |
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KR20190033872A (ko) * | 2017-09-22 | 2019-04-01 | 삼성전기주식회사 | 코일 부품 |
JP2020038961A (ja) * | 2018-08-31 | 2020-03-12 | 太陽誘電株式会社 | コイル部品及び電子機器 |
JP2020057655A (ja) * | 2018-09-28 | 2020-04-09 | 太陽誘電株式会社 | コイル部品及び電子機器 |
JP2021039961A (ja) * | 2019-08-30 | 2021-03-11 | 太陽誘電株式会社 | コイル部品、電子機器、及びコイル部品の製造方法 |
US11854731B2 (en) | 2018-08-31 | 2023-12-26 | Taiyo Yuden Co., Ltd. | Coil component and electronic device |
WO2024004494A1 (ja) * | 2022-06-29 | 2024-01-04 | パナソニックIpマネジメント株式会社 | インダクタ及びインダクタの製造方法 |
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JP7052420B2 (ja) * | 2018-03-01 | 2022-04-12 | 株式会社村田製作所 | 表面実装インダクタおよびその製造方法 |
KR102653200B1 (ko) * | 2018-10-29 | 2024-04-01 | 삼성전기주식회사 | 인덕터 |
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