WO2022153879A1 - Lead frame for winding inductor, manufacturing method for winding inductor, power-generating element, rotation detecting element, and encoder - Google Patents

Lead frame for winding inductor, manufacturing method for winding inductor, power-generating element, rotation detecting element, and encoder Download PDF

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Publication number
WO2022153879A1
WO2022153879A1 PCT/JP2021/048985 JP2021048985W WO2022153879A1 WO 2022153879 A1 WO2022153879 A1 WO 2022153879A1 JP 2021048985 W JP2021048985 W JP 2021048985W WO 2022153879 A1 WO2022153879 A1 WO 2022153879A1
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Prior art keywords
winding
core
lead frame
along
terminal portion
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PCT/JP2021/048985
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French (fr)
Japanese (ja)
Inventor
静香 上田
真一郎 吉田
嘉智 中村
政範 二村
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三菱電機株式会社
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Priority to JP2022575526A priority Critical patent/JPWO2022153879A1/ja
Publication of WO2022153879A1 publication Critical patent/WO2022153879A1/en

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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/082—Devices for guiding or positioning the winding material on the former
    • H01F41/088—Devices for guiding or positioning the winding material on the former using revolving flyers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings

Definitions

  • the present disclosure relates to a lead frame for a winding inductor used for manufacturing a winding inductor, a method for manufacturing a winding inductor, a power generation element, a rotation detection element, and an encoder.
  • terminals are connected to both ends of the magnetic core.
  • the manufacturing process of this winding inductor will be described.
  • a lead frame is prepared in which a plurality of terminal portions are projected from each of the two connecting portions provided so as to face each other toward the other connecting portion. Since the ends of the connecting portions are connected to each other, the terminal portions formed in the different connecting portions are positioned so as to face each other.
  • Such a lead frame is formed by punching a single plate material.
  • the terminal portion formed on one connecting portion and the terminal portion formed on the other connecting portion are not in contact with each other.
  • the magnetic core is adhered so as to straddle the terminal portion formed on one connecting portion and the terminal portion formed on the other connecting portion.
  • the other connecting part and the terminal part are separated, and one connecting part is cut off.
  • the portions where the terminal portion and the magnetic core are adhered are formed by arranging them in a comb-teeth shape with respect to one of the connecting portions.
  • the nozzle of the winding machine is inserted and the winding is wound around the magnetic core to form the winding part.
  • a package is formed in which a part of the terminal is exposed to cover the winding portion and the magnetic core.
  • the winding inductor is manufactured by cutting off one of the connecting portions.
  • the present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a lead frame for a winding inductor capable of improving material efficiency.
  • the present disclosure includes a plurality of cores extending along a first direction and arranged side by side along a second direction perpendicular to the first direction.
  • a connecting portion that connects one ends of a plurality of core portions, and a first terminal portion that extends from the connecting portion along the first direction and is provided on one side of the core portion along the second direction.
  • a second terminal portion connected to the connecting portion via the core portion or directly connected to the connecting portion.
  • the length of the first terminal portion along the first direction is shorter than the length of the core portion along the first direction.
  • FIG. 1 Top view of the lead frame for the winding inductor according to the first embodiment
  • FIG. The figure which shows the state which the package covering the winding part was formed in Embodiment 1.
  • FIG. The figure which shows the state which the winding inductor which concerns on Embodiment 1 are separated from the lead frame for a winding inductor.
  • FIG. 1 is a plan view of a lead frame for a winding inductor according to a first embodiment.
  • the lead frame 10 for a winding inductor includes a core portion 1A, a connecting portion 1, a first terminal portion 1C, and a second terminal portion 1B.
  • the lead frame 10 for a winding inductor is formed of, for example, a metal plate material.
  • the lead frame 10 for the winding inductor is provided with a plurality of core portions 1A.
  • the plurality of core portions 1A extend in the positive direction along the X axis, which is the first direction, and are provided side by side in the direction along the Y axis perpendicular to the X axis.
  • the direction along the Y axis is the second direction.
  • the lead frame 10 for a winding inductor is provided with a connecting portion 1 for connecting one ends 1Aa of a plurality of core portions 1A.
  • the width of the connecting portion with the connecting portion 1 is narrower than the width of the other portions.
  • the lead frame 10 for the winding inductor is provided with a first terminal portion 1C.
  • the first terminal portion 1C extends from the connecting portion 1 in the positive direction along the X axis. This can be rephrased that the first terminal portion 1C is connected to the core portion 1A via the connecting portion 1.
  • the first terminal portion 1C is provided on the positive direction side, which is one side along the Y axis with respect to the core portion 1A.
  • the tip of the first terminal portion 1C is bent in the positive direction along the Y axis.
  • the bent end portion of the first terminal portion 1C becomes the exposed portion 1Ca.
  • the bent portion of the first terminal portion 1C serves as a tangled portion for entwining the winding described later, and the exposed portion 1Ca serves as a mounting portion.
  • the lead frame 10 for the winding inductor is provided with a second terminal portion 1B.
  • the second terminal portion 1B is formed so as to extend from the other end 1Ab of the core portion 1A in the positive direction along the Y axis. This can be rephrased as the second terminal portion 1B being directly connected to the core portion 1A.
  • the second terminal portion 1B is provided with a step portion 1Bb.
  • the region on the positive direction side along the Y axis with respect to the step portion 1Bb is a region having a narrower width along the X axis than the other regions, and this region is It becomes the exposed part 1Ba.
  • the length of the first terminal portion 1C along the X axis is shorter than the length of the core portion 1A along the X axis.
  • the stepped portion 1Bb serves as a tangled portion for entwining the winding described later, and the exposed portion 1Ba serves as a mounting portion.
  • the distance a between adjacent cores 1A is wider than the width b of the cores 1A along the Y axis. Further, the distance c between the second terminal portion 1B and the core portion 1A adjacent to the positive direction side along the Y axis with respect to the core portion 1A provided with the second terminal portion 1B is the core portion 1A. Wider than the width along the Y-axis of.
  • FIG. 2 is a diagram illustrating a step of forming a winding portion on the core portion in the first embodiment.
  • a winding machine 2 is used to wind the winding around the core portion 1A to form the winding portion 3.
  • the winding portion 3 is a coil.
  • the ends of the windings are entwined and joined to the first terminal portion 1C and the second terminal portion 1B.
  • the portion joined to the first terminal portion 1C and the second terminal portion 1B is shown as the joint portion 1D.
  • the end portion of the winding is joined to the first terminal portion 1C and the second terminal portion 1B by brazing or the like.
  • a winding is entwined around the first terminal portion 1C together with the core portion 1A. Since a coating is formed on the winding, the winding and the core portion 1A are not electrically connected.
  • the winding and the first terminal portion 1C are electrically connected by joining by brazing or the like, and the winding and the second terminal portion 1B are electrically connected.
  • the windings of the first terminal portion 1C and the core portion 1A are entwined together, it is possible to prevent a short circuit between the first terminal portion 1C and the second terminal portion 1B through the core portion 1A. can. If the winding cannot be entwined together with the first terminal portion 1C and the core portion 1A, the winding is passed through the gap between the first terminal portion 1C and the core portion 1A and the first terminal portion 1C is passed. It is necessary to entangle the winding only in the nozzle 2a, which increases the restriction on the shape of the nozzle 2a.
  • the winding is wound in a relatively generous path without passing through the gap between the first terminal portion 1C and the core portion 1A. Since the wire can be passed through, it is possible to reduce the restriction on the shape of the nozzle 2a.
  • the core portion 1A is provided in a comb-teeth shape with respect to the connecting portion 1. Therefore, the winding machine 2 can be inserted from the other end 1Ab side of the core portion 1A where the connecting portion 1 is not provided to form the winding portion 3. Further, since the winding machine 2 can form the winding portion 3 if it has an operating mechanism of only one axis, that is, an operating mechanism along the X axis, it is possible to improve productivity and reduce equipment cost. ..
  • FIG. 3 is a diagram showing a state in which a winding portion is formed in the core portion in the first embodiment.
  • FIG. 4 is a diagram showing a state in which a package covering the winding portion is formed in the first embodiment.
  • the winding portion 3 is formed on the plurality of core portions 1A.
  • the lead frame 10 for the winding inductor is along the Y axis, that is, along the extending direction of the connecting portion 1 with respect to the winding machine 2. Will be moved.
  • the package 4 that covers the first terminal portion 1C, the second terminal portion 1B, and the winding portion 3 is formed.
  • the package 4 is formed of, for example, an insulating resin. Of the first terminal portion 1C and the second terminal portion 1B, the exposed portions 1Ba and 1Ca are exposed without being covered by the package 4.
  • FIG. 5 is a diagram showing a state in which the winding inductor according to the first embodiment is separated from the lead frame for the winding inductor. Next, as shown in FIG. 5, the winding inductor 11 is formed by cutting the connecting portion 1 by press working or the like.
  • both the first terminal portion 1C and the second terminal portion 1B are connected by one connecting portion 1. Therefore, in order to connect the second terminal portion 1B, it is not necessary to provide another connecting portion so as to face the connecting portion 1.
  • the other connecting portion is deleted. No other connecting part is formed. Therefore, the man-hours can be reduced in the manufacturing process of the winding inductor 11. Further, in the manufacturing process of the lead frame 10 for the winding inductor, the material efficiency of one plate material as a base material can be improved.
  • the distance c is wider than the width b. Therefore, as shown in FIG. 1, the connecting portion, the core portion, the first terminal, and the second terminal are used.
  • the core part 1A of the other part is inserted between the core parts 1A of one part. It is possible to take a configuration that has been set. That is, when the above-mentioned two parts are obtained by punching one plate material, the portion to be cut can be reduced. That is, in the manufacturing process of the lead frame 10 for the winding inductor, the material efficiency of one plate material as a base material can be further improved.
  • the winding locus at the time of entanglement is simplified and the surface surface is simplified by forming the entanglement portion and the mounting portion into a shape suitable for each function. It is possible to support a wide range of mounting methods such as mounting and through-hole mounting.
  • the winding inductor 11 can be miniaturized in the radial direction of the winding portion 3.
  • FIG. 6 is a diagram showing a modified example of the first terminal portion and the second terminal portion in the first embodiment.
  • the first terminal portion 1C and the second terminal portion 1B according to the modified example are formed in a rectangular shape that also serves as a burr portion and a mounting portion. Since the shapes of the first terminal portion 1C and the second terminal portion 1B are simplified, it is possible to reduce the warp of the lead frame 10 for the winding inductor and reduce the processing cost.
  • FIG. 7 is a diagram showing another modification of the first terminal portion and the second terminal portion in the first embodiment.
  • the first terminal portion 1C and the second terminal portion 1B according to the other modification are formed symmetrically in the direction along the Y axis with the core portion 1A as the center.
  • the center of rotation of the winding machine 2 is the entanglement of the winding around the first terminal portion 1C and the second terminal portion 1B, and when the winding is wound around the core portion 1A. Since they are the same, the control of the winding machine 2 can be simplified.
  • FIG. 8 is a diagram showing a modified example of the lead frame for the winding inductor according to the first embodiment.
  • the angle ⁇ formed by the extending direction of the connecting portion 1 and the extending direction of the core portion 1A is an acute angle.
  • the lead frame 10 for the winding inductor is moved in the extending direction of the connecting portion 1 to wind the winding from the second terminal portion 1B to the first terminal portion 1C, the winding ends. Since the distance between the terminal portion 1C of 1 and the second terminal portion 1B, which is the start of winding the winding around the next core portion 1A, becomes short, the winding machine 2 moves when forming the winding portion 3. The amount can be reduced to improve work efficiency.
  • FIG. 9 is a cross-sectional view taken along the line AA shown in FIG. 2 and is a diagram for explaining the cross-sectional shape of the core portion.
  • FIG. 10 is a cross-sectional view taken along the line AA shown in FIG. 2 and is a diagram for explaining a modified example of the cross-sectional shape of the core portion.
  • FIG. 11 is a cross-sectional view taken along the line AA shown in FIG. 2 and is a diagram for explaining another modification of the cross-sectional shape of the core portion.
  • the cross-sectional shape of the core portion 1A may be a flat plate shape. This makes it possible to simplify the shape of the lead frame 10 for the winding inductor and reduce the manufacturing man-hours. Further, as shown in FIG. 10, the cross-sectional shape of the core portion 1A may be L-shaped. As a result, the bending strength of the core portion 1A is improved, and the winding can be wound with a higher tension. Therefore, it becomes possible to use a winding having a large diameter that requires higher tension. Further, as shown in FIG. 11, the magnetic core 6 may be provided on the core portion 1A. The magnetic core 6 is joined or adhered to the core portion 1A.
  • the bending strength of the portion where the winding portion 3 including the core portion 1A is formed is improved, and the winding can be wound with a higher tension. Therefore, it becomes possible to use a winding having a large diameter that requires higher tension. Further, by providing the magnetic core 6, the inductance of the winding inductor 11 can be improved.
  • FIG. 12 is a diagram showing still another modification of the first terminal portion and the second terminal portion in the first embodiment.
  • a first wall is raised along the direction along the X axis and the direction perpendicular to the direction along the Y axis.
  • 1 Cc is provided.
  • a second wall 1Bc raised in the same direction as the first wall 1Cc is provided at one end of the second terminal portion 1B on the one end 1Aa side of the core portion 1A. Further, the first wall 1Cc and the second wall 1Bc face each other.
  • the winding portion 3 formed between the first wall 1Cc and the second wall 1Bc is guided by the first wall 1Cc and the second wall 1Bc.
  • the shape is stable. Therefore, it is not necessary to complicate the configuration of the winding machine 2 in order to stabilize the shape of the winding portion 3.
  • FIG. 13 is a diagram showing still another modification of the first terminal portion and the second terminal portion in the first embodiment.
  • the second terminal portion 1B may be formed on the side opposite to the side where the first terminal portion 1C is provided with respect to the core portion 1A.
  • the second terminal portion 1B is formed directly on the connecting portion 1.
  • the length of the winding inductor 11 along the radial direction of the winding portion 3, that is, the length along the Y axis is the length along the axial direction of the winding portion 3, that is, the X axis. It will be shorter than the length along it.
  • at least two terminal portions can be positioned on one side surface along the Y axis. As a result, the mounting area can be reduced by making the direction along the X-axis perpendicular to the mounting surface of the substrate.
  • FIG. 14 is a diagram showing another modification of the lead frame for the winding inductor according to the first embodiment.
  • the core portions 1A are alternately bent in the opposite directions by 90 °, and the adjacent core portions 1A extend in different directions.
  • the distance between the core portions 1A extending in the same direction becomes twice the distance between the core portions 1A extending in the same direction before bending. Therefore, the nozzle 2a of the winding machine 2 and the core portion 1A or the already formed winding portion 3 are less likely to interfere with each other.
  • restrictions on the shape of the nozzle 2a of the winding machine 2 are relaxed, and a larger winding portion can be formed.
  • the first terminal portion 1C is also alternately bent in the opposite direction by 90 °. Further, if the adjacent core portions 1A extend in different directions, the distance between the core portions 1A can be widened, so that the angle at which the core portions 1A are bent is not limited to 90 °.
  • FIG. 15 is a diagram showing still another modification of the lead frame for the winding inductor according to the first embodiment.
  • a core portion 1A bent 90 ° toward the front of the paper surface, a core portion 1A not bent, and a core portion 1A bent 90 ° toward the back of the paper surface are provided in this order.
  • the distance between the core portions 1A extending in the same direction becomes three times the distance between the core portions 1A extending in the same direction before bending. Therefore, the nozzle 2a of the winding machine 2 and the core portion 1A or the already formed winding portion 3 are less likely to interfere with each other.
  • the first terminal portion 1C is also bent 90 ° in the front direction of the paper surface, the first terminal portion 1C not bent, and 90 ° in the back direction of the paper surface.
  • the first terminal portions 1C provided are provided in order. Further, if the adjacent core portions 1A extend in different directions, the distance between the core portions 1A can be widened, so that the angle at which the core portions 1A are bent is not limited to 90 °.
  • FIG. 16 is a diagram showing a state in which a winding portion is formed in a core portion in the process of manufacturing a power generation element using the lead frame for a winding inductor according to the first embodiment.
  • the power generation element is manufactured by using the lead frame 10 for the winding inductor according to the first embodiment, even if the magnetic wire material 12 having a large Barkhausen effect is arranged in the vicinity of the winding portion 3 which is a coil. good.
  • the magnetic wire rod 12 is arranged on the core portion 1A, and then the winding is wound to form the winding portion 3.
  • the magnetic wire rod 12 By placing it in the vicinity of the winding portion 3, the magnetic wire rod 12 is magnetized and inverted by the large Barkhausen effect in response to a change in the external magnetic field.
  • the lead frame 10 for a winding inductor can be used as a winding core in which an electromotive force is generated in the winding portion 3 due to magnetization reversal and a change in an external magnetic field can be detected by a voltage. This makes it possible to obtain a power generation element having high material efficiency.
  • the position of the magnetic wire 12 is not limited to the example of being arranged inside the winding portion 3 together with the core portion 1A, and may be adhered to the outside of the winding portion 3, for example.
  • the magnetic wire rod 12 may be fixed to the core portion 1A by adhesion or the like and then wound, or after the winding portion 3 is formed, the magnetic wire rod 12 is inserted inside the winding portion 3 or fixed in the vicinity. You may.
  • FIG. 17 is a diagram showing a configuration of an encoder according to the second embodiment.
  • the encoder 100 according to the second embodiment includes a rotation detection element 40 and a rotation detection board 30.
  • the rotation detecting element 40 includes a power generation element 13 using a lead frame 10 for a winding inductor and a rotating disk 20.
  • the turntable 20 has a magnetic pole including a pair or more of S poles and N poles, and is rotatably supported.
  • the rotating disk 20 may be a magnetized magnetic material, or may be a non-magnetic disk in which a plurality of magnets are installed.
  • the power generation element 13 and the turntable 20 are provided so as to face each other.
  • An electromotive force is generated in the power generation element 13 due to a change in the magnetic field due to the rotation of the turntable 20, a current flows through the rotation detection substrate 30, and rotation is detected.
  • the orientation of the power generation element 13 is not limited to the example shown in FIG.
  • the power generation element 13 shown in FIG. 17 is manufactured by using the lead frame 10 for a winding inductor shown in FIGS. 1 and 2.
  • the configuration shown in the above embodiments is an example of the contents of the present disclosure.
  • the configurations of the embodiments can be combined with other known techniques. It is possible to omit or change a part of the configuration of the embodiment without departing from the gist of the present disclosure.

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  • Manufacturing & Machinery (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

A lead frame (10) for a winding inductor comprises: a plurality of core parts (1A) extending along a first direction and provided so as to be aligned along a second direction perpendicular to the first direction; a coupling part (1) coupling together one end (1Aa) of each of the plurality of core parts (1A); first end parts (1C) extending from the coupling part (1) along the first direction and provided at one side along the second direction in relation to the core parts (1A); and second end parts (1B) connected to the coupling part (1) via the core part (1A), or directly connected to the coupling part (1). The lengths of the first end parts (1C) along the first direction is shorter than the length of the core part (1A) along the first direction.

Description

巻線インダクタ用リードフレーム、巻線インダクタの製造方法、発電素子、回転検出素子、およびエンコーダLead frame for winding inductor, manufacturing method of winding inductor, power generation element, rotation detection element, and encoder
　本開示は、巻線インダクタの製造に用いられる巻線インダクタ用リードフレーム、巻線インダクタの製造方法、発電素子、回転検出素子、およびエンコーダに関する。 The present disclosure relates to a lead frame for a winding inductor used for manufacturing a winding inductor, a method for manufacturing a winding inductor, a power generation element, a rotation detection element, and an encoder.
　特許文献１に開示された巻線インダクタでは、磁気コアの両端に端子が接続されている。この巻線インダクタの製造工程について説明する。まず、互いに対向して設けられた２つの連結部のそれぞれから他方の連結部に向けて複数の端子部が突出されたリードフレームが用意される。連結部同士は互いの端部が連結されていることで、異なる連結部に形成された端子部同士が向き合うように位置決めされる。このようなリードフレームは１枚の板材を打ち抜く加工によって形成される。 In the winding inductor disclosed in Patent Document 1, terminals are connected to both ends of the magnetic core. The manufacturing process of this winding inductor will be described. First, a lead frame is prepared in which a plurality of terminal portions are projected from each of the two connecting portions provided so as to face each other toward the other connecting portion. Since the ends of the connecting portions are connected to each other, the terminal portions formed in the different connecting portions are positioned so as to face each other. Such a lead frame is formed by punching a single plate material.
　一方の連結部に形成された端子部と他方の連結部に形成された端子部とは互いに接触していない。一方の連結部に形成された端子部と他方の連結部に形成された端子部とを跨ぐように磁気コアが接着される。 The terminal portion formed on one connecting portion and the terminal portion formed on the other connecting portion are not in contact with each other. The magnetic core is adhered so as to straddle the terminal portion formed on one connecting portion and the terminal portion formed on the other connecting portion.
　次に、他方の連結部と端子部との間が切り離されて、一方の連結部が切除される。これにより、端子部と磁気コアとが接着された部分が、一方の連結部に対して櫛歯状に並べて形成された状態となる。 Next, the other connecting part and the terminal part are separated, and one connecting part is cut off. As a result, the portions where the terminal portion and the magnetic core are adhered are formed by arranging them in a comb-teeth shape with respect to one of the connecting portions.
　次に、他方の連結部が切除された側から、巻線機のノズルを差し込んで磁気コアに巻き線を巻き付けて巻線部が形成される。次に、端子の一部を露出させて巻線部と磁気コアを覆うパッケージが形成される。次に、一方の連結部が切除されることで巻線インダクタが製造される。このような巻線インダクタは大バルクハウゼン効果を有する磁性線材と組み合わせることで、磁石の移動の検出が可能な発電素子や発電素子を搭載した回転・直進運動を検出するエンコーダへ適用が可能である。 Next, from the side where the other connecting part is cut off, the nozzle of the winding machine is inserted and the winding is wound around the magnetic core to form the winding part. Next, a package is formed in which a part of the terminal is exposed to cover the winding portion and the magnetic core. Next, the winding inductor is manufactured by cutting off one of the connecting portions. By combining such a wound inductor with a magnetic wire material having a large Barkhausen effect, it can be applied to a power generation element capable of detecting the movement of a magnet and an encoder equipped with a power generation element to detect rotational / linear motion. ..
特開平６－１５１１７７号公報Japanese Unexamined Patent Publication No. 6-151177
　上記従来の技術では、リードフレームを構成する板材から一方の連結部と他方の連結部が切除される。そのため、最終的に巻線インダクタとなる部分が少なく、材料効率が低いという問題があった。 In the above-mentioned conventional technique, one connecting portion and the other connecting portion are cut off from the plate material constituting the lead frame. Therefore, there is a problem that the part that finally becomes a winding inductor is small and the material efficiency is low.
　本開示は、上記に鑑みてなされものであって、材料効率の向上を図ることができる巻線インダクタ用リードフレームを得ることを目的とする。 The present disclosure has been made in view of the above, and an object of the present disclosure is to obtain a lead frame for a winding inductor capable of improving material efficiency.
　上述した課題を解決し、目的を達成するために、本開示は、第１の方向に沿って延びるとともに第１の方向と垂直な第２の方向に沿って並べて設けられた複数の芯部と、複数の芯部の一端同士を連結させる連結部と、第１の方向に沿って連結部から延びるとともに芯部に対して第２の方向に沿った一方側に設けられた第１の端子部と、芯部を介して連結部に接続されるか、または連結部に直接接続された第２の端子部と、を備える。第１の方向に沿った第１の端子部の長さは、第１の方向に沿った芯部の長さよりも短い。 In order to solve the above-mentioned problems and achieve the object, the present disclosure includes a plurality of cores extending along a first direction and arranged side by side along a second direction perpendicular to the first direction. , A connecting portion that connects one ends of a plurality of core portions, and a first terminal portion that extends from the connecting portion along the first direction and is provided on one side of the core portion along the second direction. And a second terminal portion connected to the connecting portion via the core portion or directly connected to the connecting portion. The length of the first terminal portion along the first direction is shorter than the length of the core portion along the first direction.
　本開示によれば、材料効率の向上を図ることができる巻線インダクタ用リードフレームを得ることができるという効果を奏する。 According to the present disclosure, it is possible to obtain a lead frame for a winding inductor that can improve material efficiency.
実施の形態１にかかる巻線インダクタ用リードフレームの平面図Top view of the lead frame for the winding inductor according to the first embodiment 実施の形態１において芯部に巻線部を形成する工程を説明する図The figure explaining the process of forming a winding part in the core part in Embodiment 1. FIG. 実施の形態１において芯部に巻線部が形成された状態を示す図The figure which shows the state which the winding part was formed in the core part in Embodiment 1. FIG. 実施の形態１において巻線部を覆うパッケージが形成された状態を示す図The figure which shows the state which the package covering the winding part was formed in Embodiment 1. FIG. 実施の形態１にかかる巻線インダクタが巻線インダクタ用リードフレームから切り離された状態を示す図The figure which shows the state which the winding inductor which concerns on Embodiment 1 are separated from the lead frame for a winding inductor. 実施の形態１における第１の端子部および第２の端子部の変形例を示す図The figure which shows the modification of the 1st terminal part and the 2nd terminal part in Embodiment 1. 実施の形態１における第１の端子部および第２の端子部の他の変形例を示す図The figure which shows other modification of the 1st terminal part and the 2nd terminal part in Embodiment 1. 実施の形態１にかかる巻線インダクタ用リードフレームの変形例を示す図The figure which shows the modification of the lead frame for a winding inductor which concerns on Embodiment 1. 図２に示すＡ－Ａ線に沿った断面図であり、芯部の断面形状を説明するための図It is sectional drawing along the line AA shown in FIG. 2, and is the figure for demonstrating the sectional shape of the core part. 図２に示すＡ－Ａ線に沿った断面図であり、芯部の断面形状の変形例を説明するための図It is a cross-sectional view along the line AA shown in FIG. 2, and is the figure for demonstrating the deformation example of the cross-sectional shape of the core part. 図２に示すＡ－Ａ線に沿った断面図であり、芯部の断面形状の他の変形例を説明するための図It is a cross-sectional view along the line AA shown in FIG. 2, and is a figure for demonstrating another modification of the cross-sectional shape of a core portion. 実施の形態１における第１の端子部および第２の端子部のさらに他の変形例を示す図The figure which shows still another modification of the 1st terminal part and the 2nd terminal part in Embodiment 1. 実施の形態１における第１の端子部および第２の端子部のさらに他の変形例を示す図The figure which shows still another modification of the 1st terminal part and the 2nd terminal part in Embodiment 1. 実施の形態１にかかる巻線インダクタ用リードフレームの他の変形例を示す図The figure which shows the other modification of the lead frame for a winding inductor which concerns on Embodiment 1. 実施の形態１にかかる巻線インダクタ用リードフレームのさらに他の変形例を示す図The figure which shows still another modification of the lead frame for a winding inductor which concerns on Embodiment 1. 実施の形態１にかかる巻線インダクタ用リードフレームを使用した発電素子を製造する過程で芯部に巻線部が形成された状態を示す図The figure which shows the state which the winding part was formed in the core part in the process of manufacturing the power generation element using the lead frame for a winding inductor which concerns on Embodiment 1. FIG. 実施の形態２にかかるエンコーダの構成を示す図The figure which shows the structure of the encoder which concerns on Embodiment 2.
　以下に、本開示の実施の形態にかかる巻線インダクタ用リードフレーム、巻線インダクタの製造方法、発電素子、回転検出素子、およびエンコーダを図面に基づいて詳細に説明する。 Hereinafter, the lead frame for the winding inductor, the manufacturing method of the winding inductor, the power generation element, the rotation detection element, and the encoder according to the embodiment of the present disclosure will be described in detail with reference to the drawings.
実施の形態１．
　図１は、実施の形態１にかかる巻線インダクタ用リードフレームの平面図である。巻線インダクタ用リードフレーム１０は、芯部１Ａ、連結部１、第１の端子部１Ｃ、第２の端子部１Ｂを備える。巻線インダクタ用リードフレーム１０は、例えば金属の板材で形成される。 Embodiment 1.
FIG. 1 is a plan view of a lead frame for a winding inductor according to a first embodiment. The lead frame 10 for a winding inductor includes a core portion 1A, a connecting portion 1, a first terminal portion 1C, and a second terminal portion 1B. The lead frame 10 for a winding inductor is formed of, for example, a metal plate material.
　巻線インダクタ用リードフレーム１０には、複数の芯部１Ａが設けられている。複数の芯部１Ａは、第１の方向であるＸ軸に沿った正の方向に向けて延びるとともにＸ軸に垂直なＹ軸に沿った方向に並べて設けられている。Ｙ軸に沿った方向は第２の方向である。 The lead frame 10 for the winding inductor is provided with a plurality of core portions 1A. The plurality of core portions 1A extend in the positive direction along the X axis, which is the first direction, and are provided side by side in the direction along the Y axis perpendicular to the X axis. The direction along the Y axis is the second direction.
　巻線インダクタ用リードフレーム１０には、複数の芯部１Ａの一端１Ａａ同士を連結させる連結部１が設けられている。複数の芯部１Ａは、連結部１との接続部分の幅が他の部分の幅よりも狭くなっている。 The lead frame 10 for a winding inductor is provided with a connecting portion 1 for connecting one ends 1Aa of a plurality of core portions 1A. In the plurality of core portions 1A, the width of the connecting portion with the connecting portion 1 is narrower than the width of the other portions.
　巻線インダクタ用リードフレーム１０には、第１の端子部１Ｃが設けられている。第１の端子部１Ｃは、連結部１からＸ軸に沿った正の方向に向けて延びる。これは、第１の端子部１Ｃが、連結部１を介して芯部１Ａと接続されていると換言できる。第１の端子部１Ｃは、芯部１Ａに対してＹ軸に沿った一方側となる正の方向側に設けられている。第１の端子部１Ｃの先端は、Ｙ軸に沿った正の方向側に折り曲げられている。第１の端子部１Ｃのうち折り曲げられた先の部分が露出部１Ｃａとなる。第１の端子部１Ｃのうち折り曲げられた部分が後述する巻線をからげるからげ部となり、露出部１Ｃａが実装部となる。 The lead frame 10 for the winding inductor is provided with a first terminal portion 1C. The first terminal portion 1C extends from the connecting portion 1 in the positive direction along the X axis. This can be rephrased that the first terminal portion 1C is connected to the core portion 1A via the connecting portion 1. The first terminal portion 1C is provided on the positive direction side, which is one side along the Y axis with respect to the core portion 1A. The tip of the first terminal portion 1C is bent in the positive direction along the Y axis. The bent end portion of the first terminal portion 1C becomes the exposed portion 1Ca. The bent portion of the first terminal portion 1C serves as a tangled portion for entwining the winding described later, and the exposed portion 1Ca serves as a mounting portion.
　巻線インダクタ用リードフレーム１０には、第２の端子部１Ｂが設けられている。第２の端子部１Ｂは、芯部１Ａの他端１ＡｂからＹ軸に沿った正の方向に向けて延びるように形成されている。これは、第２の端子部１Ｂが芯部１Ａに直接接続されていると換言できる。第２の端子部１Ｂには、段差部１Ｂｂが設けられている。第２の端子部１Ｂのうち、段差部１ＢｂよりもＹ軸に沿った正の方向側となる領域は、他の領域よりもＸ軸に沿った幅が狭い領域となっており、この領域が露出部１Ｂａとなる。Ｘ軸に沿った第１の端子部１Ｃの長さは、Ｘ軸に沿った芯部１Ａの長さよりも短い。段差部１Ｂｂが後述する巻線をからげるからげ部となり、露出部１Ｂａが実装部となる。 The lead frame 10 for the winding inductor is provided with a second terminal portion 1B. The second terminal portion 1B is formed so as to extend from the other end 1Ab of the core portion 1A in the positive direction along the Y axis. This can be rephrased as the second terminal portion 1B being directly connected to the core portion 1A. The second terminal portion 1B is provided with a step portion 1Bb. Of the second terminal portion 1B, the region on the positive direction side along the Y axis with respect to the step portion 1Bb is a region having a narrower width along the X axis than the other regions, and this region is It becomes the exposed part 1Ba. The length of the first terminal portion 1C along the X axis is shorter than the length of the core portion 1A along the X axis. The stepped portion 1Bb serves as a tangled portion for entwining the winding described later, and the exposed portion 1Ba serves as a mounting portion.
　隣接する芯部１Ａ同士の間隔ａは、Ｙ軸に沿った芯部１Ａの幅ｂよりも広い。また、第２の端子部１Ｂとその第２の端子部１Ｂが設けられた芯部１Ａに対してＹ軸に沿った正の方向側に隣接する芯部１Ａとの間隔ｃは、芯部１ＡのＹ軸に沿った幅よりも広い。 The distance a between adjacent cores 1A is wider than the width b of the cores 1A along the Y axis. Further, the distance c between the second terminal portion 1B and the core portion 1A adjacent to the positive direction side along the Y axis with respect to the core portion 1A provided with the second terminal portion 1B is the core portion 1A. Wider than the width along the Y-axis of.
　次に、巻線インダクタ用リードフレーム１０を用いた巻線インダクタの製造方法について説明する。図２は、実施の形態１において芯部に巻線部を形成する工程を説明する図である。図２に示すように、巻線機２を用いて芯部１Ａに巻線が巻き付けられて巻線部３が形成される。巻線部３はコイルである。巻線の端部は、第１の端子部１Ｃおよび第２の端子部１Ｂにからげられて接合される。図２では、第１の端子部１Ｃおよび第２の端子部１Ｂに接合された箇所を接合部１Ｄとして示している。接合部１Ｄでは、巻線の端部が第１の端子部１Ｃおよび第２の端子部１Ｂにろう付け等で接合されている。第１の端子部１Ｃには、芯部１Ａもまとめて巻線がからげられている。巻線には被膜が形成されているため巻線と芯部１Ａとは導通していない。一方、接合部１Ｄではろう付け等による接合によって巻線と第１の端子部１Ｃとが導通し、巻線と第２の端子部１Ｂとが導通している。したがって、第１の端子部１Ｃと芯部１Ａをまとめて巻線がからげられていても、芯部１Ａを通じた第１の端子部１Ｃと第２の端子部１Ｂとの短絡を防ぐことができる。また、第１の端子部１Ｃと芯部１Ａとをまとめて巻線がからげられない場合には、第１の端子部１Ｃと芯部１Ａとの隙間に巻線を通して第１の端子部１Ｃにのみ巻線をからげる必要があり、ノズル２ａの形状に対する制約が大きくなる。一方、第１の端子部１Ｃと芯部１Ａとをまとめて巻線がからげることで、第１の端子部１Ｃと芯部１Ａとの隙間を通さずに比較的余裕のある経路で巻線を通すことができるため、ノズル２ａの形状に対する制約を小さくすることが可能となる。 Next, a method of manufacturing a wound inductor using the lead frame 10 for a wound inductor will be described. FIG. 2 is a diagram illustrating a step of forming a winding portion on the core portion in the first embodiment. As shown in FIG. 2, a winding machine 2 is used to wind the winding around the core portion 1A to form the winding portion 3. The winding portion 3 is a coil. The ends of the windings are entwined and joined to the first terminal portion 1C and the second terminal portion 1B. In FIG. 2, the portion joined to the first terminal portion 1C and the second terminal portion 1B is shown as the joint portion 1D. In the joint portion 1D, the end portion of the winding is joined to the first terminal portion 1C and the second terminal portion 1B by brazing or the like. A winding is entwined around the first terminal portion 1C together with the core portion 1A. Since a coating is formed on the winding, the winding and the core portion 1A are not electrically connected. On the other hand, in the joint portion 1D, the winding and the first terminal portion 1C are electrically connected by joining by brazing or the like, and the winding and the second terminal portion 1B are electrically connected. Therefore, even if the windings of the first terminal portion 1C and the core portion 1A are entwined together, it is possible to prevent a short circuit between the first terminal portion 1C and the second terminal portion 1B through the core portion 1A. can. If the winding cannot be entwined together with the first terminal portion 1C and the core portion 1A, the winding is passed through the gap between the first terminal portion 1C and the core portion 1A and the first terminal portion 1C is passed. It is necessary to entangle the winding only in the nozzle 2a, which increases the restriction on the shape of the nozzle 2a. On the other hand, by winding the first terminal portion 1C and the core portion 1A together, the winding is wound in a relatively generous path without passing through the gap between the first terminal portion 1C and the core portion 1A. Since the wire can be passed through, it is possible to reduce the restriction on the shape of the nozzle 2a.
　巻線インダクタ用リードフレーム１０において、芯部１Ａは連結部１に対して櫛歯状に設けられている。そのため、連結部１が設けられていない芯部１Ａの他端１Ａｂ側から巻線機２を差し込んで巻線部３を形成することができる。また、巻線機２は１軸のみの動作機構、すなわちＸ軸に沿った動作機構を有していれば巻線部３を形成できるので、生産性向上と設備コストの低減を図ることができる。 In the lead frame 10 for the winding inductor, the core portion 1A is provided in a comb-teeth shape with respect to the connecting portion 1. Therefore, the winding machine 2 can be inserted from the other end 1Ab side of the core portion 1A where the connecting portion 1 is not provided to form the winding portion 3. Further, since the winding machine 2 can form the winding portion 3 if it has an operating mechanism of only one axis, that is, an operating mechanism along the X axis, it is possible to improve productivity and reduce equipment cost. ..
　図３は、実施の形態１において芯部に巻線部が形成された状態を示す図である。図４は、実施の形態１において巻線部を覆うパッケージが形成された状態を示す図である。図３に示すように、複数の芯部１Ａに巻線部３が形成される。複数の芯部１Ａに連続して巻線部３を形成するために、巻線機２に対して巻線インダクタ用リードフレーム１０はＹ軸に沿った方向、すなわち連結部１の延びる方向に沿って移動される。巻線部３が形成されたのちに、第１の端子部１Ｃと、第２の端子部１Ｂと、巻線部３と、を覆うパッケージ４が形成される。パッケージ４は、例えば絶縁性の樹脂によって形成される。第１の端子部１Ｃおよび第２の端子部１Ｂのうち、露出部１Ｂａ，１Ｃａはパッケージ４に覆われずに露出している。 FIG. 3 is a diagram showing a state in which a winding portion is formed in the core portion in the first embodiment. FIG. 4 is a diagram showing a state in which a package covering the winding portion is formed in the first embodiment. As shown in FIG. 3, the winding portion 3 is formed on the plurality of core portions 1A. In order to form the winding portion 3 continuously on the plurality of core portions 1A, the lead frame 10 for the winding inductor is along the Y axis, that is, along the extending direction of the connecting portion 1 with respect to the winding machine 2. Will be moved. After the winding portion 3 is formed, the package 4 that covers the first terminal portion 1C, the second terminal portion 1B, and the winding portion 3 is formed. The package 4 is formed of, for example, an insulating resin. Of the first terminal portion 1C and the second terminal portion 1B, the exposed portions 1Ba and 1Ca are exposed without being covered by the package 4.
　図５は、実施の形態１にかかる巻線インダクタが巻線インダクタ用リードフレームから切り離された状態を示す図である。次に、図５に示すように、連結部１をプレス加工等によって切除することで、巻線インダクタ１１が形成される。 FIG. 5 is a diagram showing a state in which the winding inductor according to the first embodiment is separated from the lead frame for the winding inductor. Next, as shown in FIG. 5, the winding inductor 11 is formed by cutting the connecting portion 1 by press working or the like.
　実施の形態１にかかる巻線インダクタ用リードフレーム１０によれば、第１の端子部１Ｃと第２の端子部１Ｂの両方が１つの連結部１で連結されている。そのため、第２の端子部１Ｂを連結するために、連結部１と対向するように他の連結部を設ける必要がない。例えば、他の連結部を設けた場合には、巻線機２を芯部１Ａ間に差し込むために、他の連結部を後の工程で削除する必要があるが、本実施の形態１では削除される他の連結部が形成されていない。そのため、巻線インダクタ１１の製造工程において工数の削減を図ることができる。また、巻線インダクタ用リードフレーム１０の製造過程において、母材である１枚の板材の材料効率の向上を図ることができる。 According to the lead frame 10 for the winding inductor according to the first embodiment, both the first terminal portion 1C and the second terminal portion 1B are connected by one connecting portion 1. Therefore, in order to connect the second terminal portion 1B, it is not necessary to provide another connecting portion so as to face the connecting portion 1. For example, when another connecting portion is provided, in order to insert the winding machine 2 between the core portions 1A, it is necessary to delete the other connecting portion in a later process, but in the first embodiment, the other connecting portion is deleted. No other connecting part is formed. Therefore, the man-hours can be reduced in the manufacturing process of the winding inductor 11. Further, in the manufacturing process of the lead frame 10 for the winding inductor, the material efficiency of one plate material as a base material can be improved.
　また、実施の形態１にかかる巻線インダクタ用リードフレーム１０によれば、幅ｂよりも間隔ｃのほうが広いので、図１に示すように、連結部と芯部と第１の端子と第２の端子とが連結されたパーツを２つ用意し、一方のパーツを紙面に垂直な軸回りに１８０度回転させることで、一方のパーツの芯部１Ａ間に他方のパーツの芯部１Ａを入り込ませた構成をとることが可能となる。すなわち、１枚の板材の打ち抜き加工によって上述した２つのパーツを得る場合に、切除される部分を削減することができる。すなわち、巻線インダクタ用リードフレーム１０の製造過程において、母材である１枚の板材の材料効率のより一層の向上を図ることができる。 Further, according to the lead frame 10 for the winding inductor according to the first embodiment, the distance c is wider than the width b. Therefore, as shown in FIG. 1, the connecting portion, the core portion, the first terminal, and the second terminal are used. By preparing two parts in which the terminals of the above parts are connected and rotating one part 180 degrees around the axis perpendicular to the paper surface, the core part 1A of the other part is inserted between the core parts 1A of one part. It is possible to take a configuration that has been set. That is, when the above-mentioned two parts are obtained by punching one plate material, the portion to be cut can be reduced. That is, in the manufacturing process of the lead frame 10 for the winding inductor, the material efficiency of one plate material as a base material can be further improved.
　また、実施の形態１にかかる巻線インダクタ用リードフレーム１０によれば、からげ部と実装部をそれぞれの機能に合わせた形状とすることによってからげ時の巻線軌跡を単純とし、かつ表面実装やスルーホール実装といった幅広い実装方法に対応可能となる。 Further, according to the lead frame 10 for a winding inductor according to the first embodiment, the winding locus at the time of entanglement is simplified and the surface surface is simplified by forming the entanglement portion and the mounting portion into a shape suitable for each function. It is possible to support a wide range of mounting methods such as mounting and through-hole mounting.
　また、巻線機２の動作軸と、巻線インダクタ用リードフレーム１０の移動方向とが垂直となるので、製造設備の調整が簡便となる。また、第２の端子部１Ｂを芯部１Ａの他端１Ａｂに設けることで、巻線部３の径方向において巻線インダクタ１１の小型化を図ることができる。 Further, since the operating axis of the winding machine 2 and the moving direction of the lead frame 10 for the winding inductor are perpendicular to each other, the adjustment of the manufacturing equipment becomes easy. Further, by providing the second terminal portion 1B at the other end 1Ab of the core portion 1A, the winding inductor 11 can be miniaturized in the radial direction of the winding portion 3.
　図６は、実施の形態１における第１の端子部および第２の端子部の変形例を示す図である。変形例にかかる第１の端子部１Ｃおよび第２の端子部１Ｂは、からげ部と実装部を兼ねた長方形形状で形成されている。第１の端子部１Ｃおよび第２の端子部１Ｂの形状が単純になるため、巻線インダクタ用リードフレーム１０の反りの低減や加工費用の低減を図ることができる。 FIG. 6 is a diagram showing a modified example of the first terminal portion and the second terminal portion in the first embodiment. The first terminal portion 1C and the second terminal portion 1B according to the modified example are formed in a rectangular shape that also serves as a burr portion and a mounting portion. Since the shapes of the first terminal portion 1C and the second terminal portion 1B are simplified, it is possible to reduce the warp of the lead frame 10 for the winding inductor and reduce the processing cost.
　図７は、実施の形態１における第１の端子部および第２の端子部の他の変形例を示す図である。他の変形例にかかる第１の端子部１Ｃおよび第２の端子部１Ｂは、芯部１Ａを中心にしてＹ軸に沿った方向に対称に形成されている。これにより、巻線機２の回転中心が、第１の端子部１Ｃおよび第２の端子部１Ｂへの巻線のからげのときと、芯部１Ａへの巻線の巻きつけのときとで同一となるため、巻線機２の制御を単純化することができる。 FIG. 7 is a diagram showing another modification of the first terminal portion and the second terminal portion in the first embodiment. The first terminal portion 1C and the second terminal portion 1B according to the other modification are formed symmetrically in the direction along the Y axis with the core portion 1A as the center. As a result, when the center of rotation of the winding machine 2 is the entanglement of the winding around the first terminal portion 1C and the second terminal portion 1B, and when the winding is wound around the core portion 1A. Since they are the same, the control of the winding machine 2 can be simplified.
　図８は、実施の形態１にかかる巻線インダクタ用リードフレームの変形例を示す図である。図８に示すように、変形例にかかる巻線インダクタ用リードフレーム１０では、連結部１の延びる方向と、芯部１Ａの延びる方向とがなす角度θが鋭角となっている。この巻線インダクタ用リードフレーム１０を、連結部１の延びる方向に移動させることで、第２の端子部１Ｂから第１の端子部１Ｃに向けて巻線を巻き付ける場合に、巻き終わりである第１の端子部１Ｃと、次の芯部１Ａへの巻線の巻き始めである第２の端子部１Ｂとの距離が近くなるため、巻線部３を形成する際の巻線機２の移動量を減らして、作業効率の向上を図ることができる。 FIG. 8 is a diagram showing a modified example of the lead frame for the winding inductor according to the first embodiment. As shown in FIG. 8, in the winding inductor lead frame 10 according to the modified example, the angle θ formed by the extending direction of the connecting portion 1 and the extending direction of the core portion 1A is an acute angle. When the lead frame 10 for the winding inductor is moved in the extending direction of the connecting portion 1 to wind the winding from the second terminal portion 1B to the first terminal portion 1C, the winding ends. Since the distance between the terminal portion 1C of 1 and the second terminal portion 1B, which is the start of winding the winding around the next core portion 1A, becomes short, the winding machine 2 moves when forming the winding portion 3. The amount can be reduced to improve work efficiency.
　図９は、図２に示すＡ－Ａ線に沿った断面図であり、芯部の断面形状を説明するための図である。図１０は、図２に示すＡ－Ａ線に沿った断面図であり、芯部の断面形状の変形例を説明するための図である。図１１は、図２に示すＡ－Ａ線に沿った断面図であり、芯部の断面形状の他の変形例を説明するための図である。 FIG. 9 is a cross-sectional view taken along the line AA shown in FIG. 2 and is a diagram for explaining the cross-sectional shape of the core portion. FIG. 10 is a cross-sectional view taken along the line AA shown in FIG. 2 and is a diagram for explaining a modified example of the cross-sectional shape of the core portion. FIG. 11 is a cross-sectional view taken along the line AA shown in FIG. 2 and is a diagram for explaining another modification of the cross-sectional shape of the core portion.
　図９に示すように、芯部１Ａの断面形状は、平板状であってもよい。これにより、巻線インダクタ用リードフレーム１０の形状を単純化して、製造工数の削減を図ることが可能となる。また、図１０に示すように、芯部１Ａの断面形状は、Ｌ字形状であってもよい。これにより、芯部１Ａの曲げ強度が向上し、より高い張力で巻線を巻き付けることが可能となる。したがって、より高い張力をかける必要がある径の大きい巻線を使用することができるようになる。また、図１１に示すように、芯部１Ａ上に磁気コア６を設けてもよい。磁気コア６は、芯部１Ａに接合または接着されている。これにより、芯部１Ａを含めた巻線部３が形成される部分の曲げ強度が向上し、より高い張力で巻線を巻き付けることが可能となる。したがって、より高い張力をかける必要がある径の大きい巻線を使用することができるようになる。また、磁気コア６を設けることで巻線インダクタ１１のインダクタンスを向上させることができる。 As shown in FIG. 9, the cross-sectional shape of the core portion 1A may be a flat plate shape. This makes it possible to simplify the shape of the lead frame 10 for the winding inductor and reduce the manufacturing man-hours. Further, as shown in FIG. 10, the cross-sectional shape of the core portion 1A may be L-shaped. As a result, the bending strength of the core portion 1A is improved, and the winding can be wound with a higher tension. Therefore, it becomes possible to use a winding having a large diameter that requires higher tension. Further, as shown in FIG. 11, the magnetic core 6 may be provided on the core portion 1A. The magnetic core 6 is joined or adhered to the core portion 1A. As a result, the bending strength of the portion where the winding portion 3 including the core portion 1A is formed is improved, and the winding can be wound with a higher tension. Therefore, it becomes possible to use a winding having a large diameter that requires higher tension. Further, by providing the magnetic core 6, the inductance of the winding inductor 11 can be improved.
　図１２は、実施の形態１における第１の端子部および第２の端子部のさらに他の変形例を示す図である。第１の端子部１Ｃのうち芯部１Ａの他端１Ａｂ側となる端部にはＸ軸に沿った方向およびＹ軸に沿った方向と垂直な方向に沿って立ち上げられた第１の壁１Ｃｃが設けられている。第２の端子部１Ｂのうち芯部１Ａの一端１Ａａ側となる端部には第１の壁１Ｃｃと同様の方向に沿って立ち上げられた第２の壁１Ｂｃが設けられている。また、第１の壁１Ｃｃと第２の壁１Ｂｃとは互いに向き合っている。このような構成によれば、第１の壁１Ｃｃと第２の壁１Ｂｃとの間に形成される巻線部３は、第１の壁１Ｃｃと第２の壁１Ｂｃとにガイドされることで形状が安定する。そのため、巻線部３の形状を安定化させるために巻線機２の構成を複雑化する必要がなくなる。 FIG. 12 is a diagram showing still another modification of the first terminal portion and the second terminal portion in the first embodiment. At the end of the first terminal portion 1C on the other end 1Ab side of the core portion 1A, a first wall is raised along the direction along the X axis and the direction perpendicular to the direction along the Y axis. 1 Cc is provided. A second wall 1Bc raised in the same direction as the first wall 1Cc is provided at one end of the second terminal portion 1B on the one end 1Aa side of the core portion 1A. Further, the first wall 1Cc and the second wall 1Bc face each other. According to such a configuration, the winding portion 3 formed between the first wall 1Cc and the second wall 1Bc is guided by the first wall 1Cc and the second wall 1Bc. The shape is stable. Therefore, it is not necessary to complicate the configuration of the winding machine 2 in order to stabilize the shape of the winding portion 3.
　図１３は、実施の形態１における第１の端子部および第２の端子部のさらに他の変形例を示す図である。図１３に示すように、芯部１Ａに対して第１の端子部１Ｃが設けられた側の反対側に、第２の端子部１Ｂを形成してもよい。この場合、第２の端子部１Ｂは連結部１に直接形成される。一般的に、巻線インダクタ１１は巻線部３の径方向に沿った長さ、すなわちＹ軸に沿った長さのほうが、巻線部３の軸方向に沿った長さ、すなわちＸ軸に沿った長さよりも短くなる。図１３に示した変形例によれば、少なくとも２つの端子部をＹ軸に沿った一方側の面に位置させることができる。これにより、Ｘ軸に沿った方向を基板の実装面に対して垂直にして実装することが可能なり、実装面積の縮小化を図ることができる。 FIG. 13 is a diagram showing still another modification of the first terminal portion and the second terminal portion in the first embodiment. As shown in FIG. 13, the second terminal portion 1B may be formed on the side opposite to the side where the first terminal portion 1C is provided with respect to the core portion 1A. In this case, the second terminal portion 1B is formed directly on the connecting portion 1. Generally, the length of the winding inductor 11 along the radial direction of the winding portion 3, that is, the length along the Y axis is the length along the axial direction of the winding portion 3, that is, the X axis. It will be shorter than the length along it. According to the modification shown in FIG. 13, at least two terminal portions can be positioned on one side surface along the Y axis. As a result, the mounting area can be reduced by making the direction along the X-axis perpendicular to the mounting surface of the substrate.
　図１４は、実施の形態１にかかる巻線インダクタ用リードフレームの他の変形例を示す図である。図１４に示す変形例では、芯部１Ａが交互に９０°反対方向に折り曲げられており、隣接する芯部１Ａ同士が異なる方向に延びることとなる。これにより、同じ方向に延びる芯部１Ａ間の距離が、折り曲げる前に同じ方向に延びていた芯部１Ａ間の距離の２倍となる。したがって、巻線機２のノズル２ａと芯部１Ａまたはすでに形成済みの巻線部３とが干渉しにくくなる。これにより、巻線機２のノズル２ａの形状の制約が緩和されるほか、より大きい巻線部を形成可能となる。なお、第１の端子部１Ｃも交互に９０°反対方向に折り曲げられている。また、隣接する芯部１Ａ同士が異なる方向に延びていれば芯部１Ａ同士の間隔を広げることができるので、芯部１Ａが折り曲げられる角度は９０°に限られない。 FIG. 14 is a diagram showing another modification of the lead frame for the winding inductor according to the first embodiment. In the modified example shown in FIG. 14, the core portions 1A are alternately bent in the opposite directions by 90 °, and the adjacent core portions 1A extend in different directions. As a result, the distance between the core portions 1A extending in the same direction becomes twice the distance between the core portions 1A extending in the same direction before bending. Therefore, the nozzle 2a of the winding machine 2 and the core portion 1A or the already formed winding portion 3 are less likely to interfere with each other. As a result, restrictions on the shape of the nozzle 2a of the winding machine 2 are relaxed, and a larger winding portion can be formed. The first terminal portion 1C is also alternately bent in the opposite direction by 90 °. Further, if the adjacent core portions 1A extend in different directions, the distance between the core portions 1A can be widened, so that the angle at which the core portions 1A are bent is not limited to 90 °.
　図１５は、実施の形態１にかかる巻線インダクタ用リードフレームのさらに他の変形例を示す図である。図１５に示す変形例では、紙面手前方向に９０°折り曲げられた芯部１Ａ、折り曲げられていない芯部１Ａ、紙面奥方向に９０°折り曲げられた芯部１Ａを順番に設けている。これにより、同じ方向に延びる芯部１Ａ間の距離が、折り曲げる前に同じ方向に延びていた芯部１Ａ間の距離の３倍となる。したがって、巻線機２のノズル２ａと芯部１Ａまたはすでに形成済みの巻線部３とが干渉しにくくなる。これにより、巻線機２のノズル２ａの形状の制約が緩和されるほか、より大きい巻線部を形成可能となる。なお、第１の端子部１Ｃも芯部１Ａと同様に、紙面手前方向に９０°折り曲げられた第１の端子部１Ｃ、折り曲げられていない第１の端子部１Ｃ、紙面奥方向に９０°折り曲げられた第１の端子部１Ｃが順番に設けられている。また、隣接する芯部１Ａ同士が異なる方向に延びていれば芯部１Ａ同士の間隔を広げることができるので、芯部１Ａが折り曲げられる角度は９０°に限られない。 FIG. 15 is a diagram showing still another modification of the lead frame for the winding inductor according to the first embodiment. In the modified example shown in FIG. 15, a core portion 1A bent 90 ° toward the front of the paper surface, a core portion 1A not bent, and a core portion 1A bent 90 ° toward the back of the paper surface are provided in this order. As a result, the distance between the core portions 1A extending in the same direction becomes three times the distance between the core portions 1A extending in the same direction before bending. Therefore, the nozzle 2a of the winding machine 2 and the core portion 1A or the already formed winding portion 3 are less likely to interfere with each other. As a result, restrictions on the shape of the nozzle 2a of the winding machine 2 are relaxed, and a larger winding portion can be formed. Similarly to the core portion 1A, the first terminal portion 1C is also bent 90 ° in the front direction of the paper surface, the first terminal portion 1C not bent, and 90 ° in the back direction of the paper surface. The first terminal portions 1C provided are provided in order. Further, if the adjacent core portions 1A extend in different directions, the distance between the core portions 1A can be widened, so that the angle at which the core portions 1A are bent is not limited to 90 °.
　図１６は、実施の形態１にかかる巻線インダクタ用リードフレームを使用した発電素子を製造する過程で芯部に巻線部が形成された状態を示す図である。実施の形態１にかかる巻線インダクタ用リードフレーム１０を使用して発電素子を製造する場合には、コイルである巻線部３の近傍に大バルクハウゼン効果を有する磁性線材１２を配置してもよい。具体的には、図１６に示すように芯部１Ａ上に磁性線材１２を配置してから巻線を巻き付けて巻線部３を形成する。 FIG. 16 is a diagram showing a state in which a winding portion is formed in a core portion in the process of manufacturing a power generation element using the lead frame for a winding inductor according to the first embodiment. When the power generation element is manufactured by using the lead frame 10 for the winding inductor according to the first embodiment, even if the magnetic wire material 12 having a large Barkhausen effect is arranged in the vicinity of the winding portion 3 which is a coil. good. Specifically, as shown in FIG. 16, the magnetic wire rod 12 is arranged on the core portion 1A, and then the winding is wound to form the winding portion 3.
　巻線部３の近傍にすることで、外部の磁界の変化に応じて磁性線材１２が大バルクハウゼン効果で磁化反転する。磁化反転によって巻線部３に起電力が生じ、外部磁界の変化を電圧で検出することが可能な巻き芯として巻線インダクタ用リードフレーム１０を用いることができる。これにより、材料効率の高い発電素子を得ることが可能となる。磁性線材１２の位置は芯部１Ａとともに巻線部３の内部に配置される例に限られず、例えば巻線部３の外側に接着させてもよい。ここで、磁性線材１２は芯部１Ａに接着等で固定してから巻線してもよいし、巻線部３の形成後に磁性線材１２を巻線部３の内側に差し込む、または近傍に固定してもよい。 By placing it in the vicinity of the winding portion 3, the magnetic wire rod 12 is magnetized and inverted by the large Barkhausen effect in response to a change in the external magnetic field. The lead frame 10 for a winding inductor can be used as a winding core in which an electromotive force is generated in the winding portion 3 due to magnetization reversal and a change in an external magnetic field can be detected by a voltage. This makes it possible to obtain a power generation element having high material efficiency. The position of the magnetic wire 12 is not limited to the example of being arranged inside the winding portion 3 together with the core portion 1A, and may be adhered to the outside of the winding portion 3, for example. Here, the magnetic wire rod 12 may be fixed to the core portion 1A by adhesion or the like and then wound, or after the winding portion 3 is formed, the magnetic wire rod 12 is inserted inside the winding portion 3 or fixed in the vicinity. You may.
実施の形態２．
　図１７は、実施の形態２にかかるエンコーダの構成を示す図である。実施の形態２にかかるエンコーダ１００は、回転検出素子４０と、回転検出基板３０とを備える。回転検出素子４０は、巻線インダクタ用リードフレーム１０を使用した発電素子１３と、回転盤２０とを備える。回転盤２０は、一対以上のＳ極及びＮ極を含む磁極を有し、回転可能に支持されている。回転盤２０は、着磁された磁性体であってもよいし、非磁性体の円盤に複数の磁石を設置したものであってもよい。発電素子１３と回転盤２０とは互いに対向するように設けられている。回転盤２０が回転することによる磁界の変化によって発電素子１３に起電力が生じ、回転検出基板３０に電流が流れ、回転が検出される。発電素子１３の向きは図１７に示す例に限られない。なお、図１７に示した発電素子１３は、図１および図２に示した巻線インダクタ用リードフレーム１０を使用して製造されている。 Embodiment 2.
FIG. 17 is a diagram showing a configuration of an encoder according to the second embodiment. The encoder 100 according to the second embodiment includes a rotation detection element 40 and a rotation detection board 30. The rotation detecting element 40 includes a power generation element 13 using a lead frame 10 for a winding inductor and a rotating disk 20. The turntable 20 has a magnetic pole including a pair or more of S poles and N poles, and is rotatably supported. The rotating disk 20 may be a magnetized magnetic material, or may be a non-magnetic disk in which a plurality of magnets are installed. The power generation element 13 and the turntable 20 are provided so as to face each other. An electromotive force is generated in the power generation element 13 due to a change in the magnetic field due to the rotation of the turntable 20, a current flows through the rotation detection substrate 30, and rotation is detected. The orientation of the power generation element 13 is not limited to the example shown in FIG. The power generation element 13 shown in FIG. 17 is manufactured by using the lead frame 10 for a winding inductor shown in FIGS. 1 and 2.
　以上の実施の形態に示した構成は、本開示の内容の一例を示すものである。実施の形態の構成は、別の公知の技術と組み合わせることが可能である。本開示の要旨を逸脱しない範囲で、実施の形態の構成の一部を省略または変更することが可能である。 The configuration shown in the above embodiments is an example of the contents of the present disclosure. The configurations of the embodiments can be combined with other known techniques. It is possible to omit or change a part of the configuration of the embodiment without departing from the gist of the present disclosure.
　１　連結部、１Ａ　芯部、１Ａａ　一端、１Ａｂ　他端、１Ｂ　第２の端子部、１Ｂａ　露出部、１Ｂｂ　段差部、１Ｂｃ　第２の壁、１Ｃ　第１の端子部、１Ｃａ　露出部、１Ｃｃ　第１の壁、２　巻線機、２ａ　ノズル、３　巻線部、４　パッケージ、６　磁気コア、１０　巻線インダクタ用リードフレーム、１１　巻線インダクタ、１２　磁性線材、１３　発電素子、３０　回転検出基板、４０　回転検出素子、１００　エンコーダ。 1 connecting part, 1A core part, 1Aa one end, 1Ab other end, 1B second terminal part, 1Ba exposed part, 1Bb stepped part, 1Bc second wall, 1C first terminal part, 1Ca exposed part, 1Cc first Wall, 2 winding machine, 2a nozzle, 3 winding part, 4 package, 6 magnetic core, 10 lead frame for winding inductor, 11 winding inductor, 12 magnetic wire, 13 power generation element, 30 rotation detection board, 40 Rotation detection element, 100 inductors.

Claims (15)

  1. 　第１の方向に沿って延びるとともに前記第１の方向と垂直な第２の方向に沿って並べて設けられた複数の芯部と、
    　複数の前記芯部の一端同士を連結させる連結部と、
    　前記第１の方向に沿って前記連結部から延びるとともに前記芯部に対して前記第２の方向に沿った一方側に設けられた第１の端子部と、
    　前記芯部を介して前記連結部に接続されるか、または前記連結部に直接接続された第２の端子部と、を備え、
    　前記第１の方向に沿った前記第１の端子部の長さは、前記第１の方向に沿った前記芯部の長さよりも短いことを特徴とする巻線インダクタ用リードフレーム。     A plurality of cores extending along the first direction and arranged side by side along the second direction perpendicular to the first direction.
    A connecting portion that connects one ends of the plurality of core portions,
    A first terminal portion extending from the connecting portion along the first direction and provided on one side of the core portion along the second direction.
    A second terminal portion connected to the connecting portion via the core portion or directly connected to the connecting portion is provided.
    A lead frame for a winding inductor, characterized in that the length of the first terminal portion along the first direction is shorter than the length of the core portion along the first direction.
  2. 　隣接する前記芯部同士の間隔が、前記第２の方向に沿った前記芯部の幅より広いことを特徴とする請求項１に記載の巻線インダクタ用リードフレーム。 The lead frame for a winding inductor according to claim 1, wherein the distance between the adjacent cores is wider than the width of the cores along the second direction.
  3. 　前記第２の端子部は、前記芯部の先端に設けられていることを特徴とする請求項１または２に記載の巻線インダクタ用リードフレーム。 The lead frame for a winding inductor according to claim 1 or 2, wherein the second terminal portion is provided at the tip of the core portion.
  4. 　前記第２の端子部は、前記第２の方向に沿った一方側に向けて延びており、
    　前記第２の端子部とその第２の端子が設けられた前記芯部に対して一方側に隣接する前記芯部との間隔は、前記芯部の幅よりも広いことを特徴とする請求項３に記載の巻線インダクタ用リードフレーム。     The second terminal portion extends toward one side along the second direction.
    A claim, wherein the distance between the second terminal portion and the core portion adjacent to one side of the core portion provided with the second terminal is wider than the width of the core portion. 3. The lead frame for a winding inductor according to 3.
  5. 　前記第１の方向と、前記連結部の延びる方向とがなす角度が鋭角であることを特徴とする請求項３または４に記載の巻線インダクタ用リードフレーム。 The lead frame for a winding inductor according to claim 3 or 4, wherein the angle formed by the first direction and the extending direction of the connecting portion is an acute angle.
  6. 　前記第１の端子部のうち前記芯部の先端側となる端部には前記第１の方向および前記第２の方向と垂直な第３の方向に沿って立ち上げられた第１の壁が設けられ、
    　前記第２の端子部のうち前記芯部の根元側となる端部には前記第３の方向に沿って立ち上げられた第２の壁が設けられ、
    　前記第１の壁と前記第２の壁とが互いに向き合っていることを特徴とする請求項３から５のいずれか１つに記載の巻線インダクタ用リードフレーム。     At the end of the first terminal portion on the tip end side of the core portion, a first wall raised along the first direction and a third direction perpendicular to the second direction is formed. Provided,
    A second wall raised along the third direction is provided at the end of the second terminal portion on the root side of the core portion.
    The lead frame for a winding inductor according to any one of claims 3 to 5, wherein the first wall and the second wall face each other.
  7. 　前記芯部を前記第２の方向に沿って切断した断面形状がＬ字形状であることを特徴とする請求項１から５のいずれか１つに記載の巻線インダクタ用リードフレーム。 The lead frame for a winding inductor according to any one of claims 1 to 5, wherein the core portion is cut along the second direction and the cross-sectional shape is L-shaped.
  8. 　前記芯部に接着された磁気コアをさらに備えることを特徴とする請求項１から６のいずれか１つに記載の巻線インダクタ用リードフレーム。 The lead frame for a winding inductor according to any one of claims 1 to 6, further comprising a magnetic core adhered to the core portion.
  9. 　前記第２の端子部は、前記芯部に対して前記第２の方向に沿った他方側に設けられていることを特徴とする請求項１または２に記載の巻線インダクタ用リードフレーム。 The lead frame for a winding inductor according to claim 1 or 2, wherein the second terminal portion is provided on the other side of the core portion along the second direction.
  10. 　複数の前記芯部のうち少なくとも一部の芯部が、前記第１の方向および前記第２の方向と垂直な第３の方向に向けて折り曲げられており、
    　隣接する前記芯部同士で延びる方向が異なっていることを特徴とする請求項１に記載の巻線インダクタ用リードフレーム。     At least a part of the core portions is bent in the first direction and the third direction perpendicular to the second direction.
    The lead frame for a winding inductor according to claim 1, wherein the extending directions of the adjacent core portions are different from each other.
  11. 　請求項１から１０のいずれか１つに記載の巻線インダクタ用リードフレームを用いた巻線インダクタの製造方法であって、
    　前記芯部に巻線を巻き付けるとともに、前記巻線の端部の一端と他端とを前記第１の端子部と前記第２の端子部に接合させて巻線部を形成する工程と、
    　前記第１の端子部の一部と前記第２の端子部の一部を露出させて、前記芯部および前記巻線部を樹脂で覆う工程と、
    　前記連結部を切除する工程と、を備えることを特徴とする巻線インダクタの製造方法。     A method for manufacturing a winding inductor using the lead frame for a winding inductor according to any one of claims 1 to 10.
    A step of winding a winding around the core portion and joining one end and the other end of the end portion of the winding to the first terminal portion and the second terminal portion to form a winding portion.
    A step of exposing a part of the first terminal portion and a part of the second terminal portion and covering the core portion and the winding portion with a resin.
    A method for manufacturing a winding inductor, which comprises a step of cutting off the connecting portion.
  12. 　請求項１１に記載の巻線インダクタの製造方法によって製造された巻線インダクタと、
    　前記巻線部の内側に設けられた磁性線材と、を備えることを特徴とする発電素子。     A wound inductor manufactured by the method for manufacturing a wound inductor according to claim 11,
    A power generation element including a magnetic wire rod provided inside the winding portion.
  13. 　請求項１１に記載の巻線インダクタの製造方法によって製造された巻線インダクタと、
    　前記巻線部の外側に設けられた磁性線材と、を備えることを特徴とする発電素子。     A wound inductor manufactured by the method for manufacturing a wound inductor according to claim 11,
    A power generation element including a magnetic wire rod provided on the outside of the winding portion.
  14. 　請求項１２または１３に記載の発電素子と、
    　一対以上のＳ極およびＮ極を含む磁極を有し、回転可能に支持された回転盤と、を備えることを特徴とする回転検出素子。     The power generation element according to claim 12 or 13,
    A rotation detection element having a magnetic pole including a pair or more of S poles and N poles, and comprising a rotary disk rotatably supported.
  15. 　請求項１４に記載の回転検出素子と、
    　前記回転盤の回転に伴って前記発電素子に生じた起電力により流れる電流を検出する回転検出基板と、を備えることを特徴とするエンコーダ。     The rotation detection element according to claim 14,
    An encoder including a rotation detection board for detecting a current flowing due to an electromotive force generated in the power generation element with the rotation of the turntable.
PCT/JP2021/048985 2021-01-15 2021-12-28 Lead frame for winding inductor, manufacturing method for winding inductor, power-generating element, rotation detecting element, and encoder WO2022153879A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63313906A (en) * 1987-01-14 1988-12-22 Takeshi Ikeda Foil rolled electronic parts and their manufacture
JPH04147009A (en) * 1990-10-09 1992-05-20 Matsushita Electric Ind Co Ltd Multirotation type absolute-value rotary encoder
JPH0669036A (en) * 1992-08-13 1994-03-11 Tokin Corp Wire-wound chip inductor and its manufacture
JPH06188459A (en) * 1992-12-17 1994-07-08 Toshiba Corp Semiconductor light emitting device and manufacture thereof
JPH06215943A (en) * 1993-01-19 1994-08-05 Tokin Corp Chip inductor, manufacture thereof, and lead frame therefor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63313906A (en) * 1987-01-14 1988-12-22 Takeshi Ikeda Foil rolled electronic parts and their manufacture
JPH04147009A (en) * 1990-10-09 1992-05-20 Matsushita Electric Ind Co Ltd Multirotation type absolute-value rotary encoder
JPH0669036A (en) * 1992-08-13 1994-03-11 Tokin Corp Wire-wound chip inductor and its manufacture
JPH06188459A (en) * 1992-12-17 1994-07-08 Toshiba Corp Semiconductor light emitting device and manufacture thereof
JPH06215943A (en) * 1993-01-19 1994-08-05 Tokin Corp Chip inductor, manufacture thereof, and lead frame therefor

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