JP2006186143A

JP2006186143A - Winding core and capacitor

Info

Publication number: JP2006186143A
Application number: JP2004378979A
Authority: JP
Inventors: Kazunori Akizuki; 一紀秋月
Original assignee: Shizuki Electric Co Inc
Current assignee: Shizuki Electric Co Inc
Priority date: 2004-12-28
Filing date: 2004-12-28
Publication date: 2006-07-13

Abstract

<P>PROBLEM TO BE SOLVED: To provide a capacitor with a greater ESL reduction effect for a capacitor element and a winding core appropriate to this capacitor. <P>SOLUTION: A belt-like metallic part for configuring electrodes of the capacitor element 5 and a belt-like dielectric body for configuring the dielectric body of the capacitor element 5 are wound on the winding core 1. Metallicon electrodes 3, 4 are respectively formed to opposed end faces of the winding core 1, the one metallicon electrode 3 is connected to the metallic part 6 of the winding core 1, and an electrode lead-out member 16 conductive to the metallic part 6 in the winding core 1 and nonconductive to the other metallicon electrode 4 is provided to the other metallicon electrode 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、コンデンサの巻芯用コア及びこのコアを使用したコンデンサに関するものである。 The present invention relates to a core for a core of a capacitor and a capacitor using the core.

コンデンサとして、図３に示すように、絶縁樹脂製のコア３１と、このコア３１に巻回される誘電体３２と、この誘電体３２の端面に形成されるメタリコン電極３３、３４とからなるコンデンサ素子３５を備えたものがある（例えば、特許文献１参照）。なお、メタリコン電極３３、３４はメタリコン金属を溶射することによって形成される。
特開昭５９−１９３１０号公報 As a capacitor, as shown in FIG. 3, a capacitor comprising an insulating resin core 31, a dielectric 32 wound around the core 31, and metallicon electrodes 33, 34 formed on the end face of the dielectric 32. Some devices include an element 35 (see, for example, Patent Document 1). Metallicon electrodes 33 and 34 are formed by spraying metallicon metal.
JP 59-19310

この場合、端子やリード線は、一方端部がメタリコン電極３３、３４に接続され、他方端部が外部の部品等に接続される。コンデンサには、例えば図３の右側のメタリコン電極３４から左側のメタリコン電極３３に電流が流れることになる。この場合、コンデンサに瞬時に電流を流すときに、コンデンサから外部部品までの配線のインダクタンスのみならずコンデンサ素子自体のＥＳＬ（等価直列インダクタンス）を小さくすれば、インダクタンスがより小になり有効である。しかしながら、図３に示すようなコンデンサにおいて、ＥＳＬを低減するには、外部部品に繋がる端子やリード線等の配線を工夫する必要があるが、より大きいＥＳＬ低減効果を得るのは難しい。 In this case, one end of the terminal or the lead wire is connected to the metallicon electrodes 33 and 34, and the other end is connected to an external component or the like. In the capacitor, for example, a current flows from the right metallicon electrode 34 to the left metallicon electrode 33 in FIG. In this case, it is effective to reduce not only the inductance of the wiring from the capacitor to the external component but also the ESL (equivalent series inductance) of the capacitor element itself when the current is passed through the capacitor instantaneously. However, in the capacitor as shown in FIG. 3, in order to reduce ESL, it is necessary to devise wiring such as terminals and lead wires connected to external components, but it is difficult to obtain a larger ESL reduction effect.

この発明は、上記事情を考慮してなされたもので、コンデンサ素子のＥＳＬ低減効果が大きいコンデンサ及びこのコンデンサに好適となる巻芯用コアを提供することにある。 The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a capacitor having a large ESL reduction effect of a capacitor element and a core for a core suitable for the capacitor.

請求項１の巻芯用コアは、コンデンサの巻芯用コアであって、一方端部を金属部６で構成し、かつ他方端部を絶縁部７で構成することを特徴としている。 The core for core of claim 1 is a core for core of a capacitor, characterized in that one end is constituted by a metal part 6 and the other end is constituted by an insulating part 7.

請求項２のコンデンサは、請求項１の巻芯用コア１に、コンデンサ素子５の電極を構成する帯状金属部とコンデンサ素子５の誘電体を構成する帯状誘電体部を巻回し、端面にメタリコン電極３、４を形成して、一方のメタリコン電極３と上記巻芯用コア１の金属部６とを接続し、かつ、他方のメタリコン電極４側に、上記巻芯用コア内１で上記金属部６と導通するとともに他方のメタリコン電極４とは非導通の電極引出し部材１６を設けたことを特徴としている。 The capacitor according to claim 2 is formed by winding the band-shaped metal portion constituting the electrode of the capacitor element 5 and the band-shaped dielectric portion constituting the dielectric of the capacitor element 5 around the core 1 for winding core according to the first aspect. Electrodes 3 and 4 are formed to connect one metallicon electrode 3 and the metal part 6 of the core for core 1, and the metal in the core for core 1 on the other metallicon electrode 4 side. An electrode lead member 16 is provided which is electrically connected to the portion 6 and is not electrically connected to the other metallicon electrode 4.

請求項１の巻芯用コアによれば、一方端部を金属部で構成し、かつ他方端部を絶縁部で構成しているので、この巻芯用コアを使用してコンデンサ素子を構成すれば、このコンデンサ素子の一方のメタリコン電極と一方端部側とが導通状態となると共に、このコンデンサ素子の他方のメタリコン電極と他方端部側とが非導通状態となる。このため、巻芯用コアを流れる電流の向きを、コンデンサ素子の容量形成部を流れる電流の向きと逆方向とすることができる。これによって、ＥＳＬ（等価直列インダクタンス）を小さくすることができる。したがって、この巻芯用コアを使用してコンデンサ素子を製作することにより、ＥＳＬを低減したコンデンサが容易に得られる。 According to the core for core of claim 1, since one end portion is constituted by a metal portion and the other end portion is constituted by an insulating portion, a capacitor element can be constituted by using this core for core. For example, one metallicon electrode and one end side of the capacitor element are brought into conduction, and the other metallicon electrode and the other end side of the capacitor element are brought out of conduction. For this reason, the direction of the current flowing through the core for core can be opposite to the direction of the current flowing through the capacitance forming portion of the capacitor element. Thereby, ESL (equivalent series inductance) can be reduced. Therefore, a capacitor with reduced ESL can be easily obtained by manufacturing a capacitor element using the core for core.

請求項２のコンデンサによれば、他方のメタリコン電極から一方のメタリコン電極に電流を流せば、巻芯用コアの金属部を介して他方の導電性接続部材である電極引出し部材に流れる。すなわち、コンデンサ素子の容量形成部を流れる電流とコアを流れる電流が逆向きに流れ、ＥＳＬが低減される。特に、巻芯用コアの電流は、コンデンサ素子の内部で、容量形成部の電流と近接して流れることからＥＳＬの低減効果がよい。 According to the capacitor of the second aspect, when a current is passed from the other metallicon electrode to the one metallicon electrode, the current flows to the electrode lead member which is the other conductive connecting member through the metal portion of the core for core. That is, the current flowing through the capacitance forming portion of the capacitor element and the current flowing through the core flow in opposite directions, and ESL is reduced. In particular, since the current of the core for the core flows close to the current of the capacitance forming portion inside the capacitor element, the effect of reducing ESL is good.

次に、この発明の巻芯用コア及びこのコアに使用したコンデンサの具体的な実施の形態について、図面を参照しつつ詳細に説明する。図１はこの発明のコンデンサの断面図を示し、図２はその斜視図を示している。このコンデンサは、巻芯用コア１と、この巻芯用コア１に巻回された容量形成部２と、この容量形成部２の端面に形成されるメタリコン電極３、４とで構成されるコンデンサ素子５を備える。この場合、容量形成部２は、コンデンサ素子５の電極を構成する帯状金属部とコンデンサ素子５の誘電体を構成する帯状誘電体部を巻回することによって形成される。また、各メタリコン電極３、４は、容量形成部２の端面にメタリコン金属を溶射することによって形成される。 Next, specific embodiments of the core for core of the present invention and the capacitor used for the core will be described in detail with reference to the drawings. FIG. 1 shows a sectional view of the capacitor of the present invention, and FIG. 2 shows a perspective view thereof. This capacitor is composed of a core 1 for the core, a capacity forming portion 2 wound around the core 1 for the core, and metallicon electrodes 3, 4 formed on the end face of the capacity forming portion 2. An element 5 is provided. In this case, the capacitance forming portion 2 is formed by winding a strip-shaped metal portion constituting the electrode of the capacitor element 5 and a strip-shaped dielectric portion constituting the dielectric of the capacitor element 5. Further, each metallicon electrode 3, 4 is formed by spraying a metallicon metal on the end face of the capacitance forming portion 2.

巻芯用コア１は筒体から構成され、その一方端部が金属部６で構成され、他方端部が金属部６と面一の絶縁部（絶縁樹脂）７で構成される。すなわち、巻芯用コア１は、金属製筒体からなる本体部９と、この本体部９の他端側（他方のメタリコン電極４側）に連設される上記絶縁部７とから構成される。この場合、絶縁部７は薄肉の第１部１１と厚肉の第２部１２とからなり、また、本体部９の他端側には周方向切欠部１０が設けられている。そして、本体部９の周方向切欠部１０に絶縁部７の第１部１１が嵌合して、本体部９と絶縁部７とが一体化される。この際、本体部９の外周面と、絶縁部７の外周面とは略同一外径とされ、本体部９の内周面と絶縁部７の第２部１２の内周面とが略同一内径とされる。このため、巻芯用コア１の外面（外周面）及び内面（内周面）には段付き部が形成されない。すなわち、上記面一とは、巻芯用コア１の外面及び内面に段付き部が形成されないことである。このように、金属部６は、本体部９にて構成されることになり、この巻芯用コア１の一方端部から他方端部の近くまでを占めることになる。 The core 1 for winding core is comprised from a cylinder, The one end part is comprised by the metal part 6, and the other end part is comprised by the metal part 6 and the insulation part (insulating resin) 7 flush with it. That is, the core for core 1 is composed of a main body portion 9 made of a metal cylinder, and the insulating portion 7 connected to the other end side (the other metallicon electrode 4 side) of the main body portion 9. . In this case, the insulating portion 7 includes a thin first portion 11 and a thick second portion 12, and a circumferential cutout portion 10 is provided on the other end side of the main body portion 9. And the 1st part 11 of the insulating part 7 fits into the circumferential direction notch part 10 of the main-body part 9, and the main-body part 9 and the insulating part 7 are integrated. At this time, the outer peripheral surface of the main body portion 9 and the outer peripheral surface of the insulating portion 7 have substantially the same outer diameter, and the inner peripheral surface of the main body portion 9 and the inner peripheral surface of the second portion 12 of the insulating portion 7 are substantially the same. The inner diameter. For this reason, a stepped portion is not formed on the outer surface (outer peripheral surface) and inner surface (inner peripheral surface) of the core for core 1. In other words, the above-mentioned flushness means that stepped portions are not formed on the outer surface and the inner surface of the core for core 1. Thus, the metal part 6 is comprised by the main-body part 9, and occupies from the one end part of this core 1 for winding cores to the vicinity of the other end part.

一方のメタリコン電極３の軸心孔は、その軸心が巻芯用コア１の軸心と略一致し、その内径が巻芯用コア１の内径と略一致している。そのため、本体部９の一方の端部端面、つまり金属部６の一方の端面がメタリコン電極３の内面に付き合わせ状となっている。また、他方のメタリコン電極４の軸心孔は、その軸心が巻芯用コア１の軸心と略一致し、その内径が絶縁部７の外径と略一致している。そのため、絶縁部７の端部１３がメタリコン電極４の外端面から僅かに突出している。 The axial hole of one metallicon electrode 3 has its axial center substantially coincident with the axial center of the core 1 for core, and its inner diameter substantially coincides with the inner diameter of the core 1 for core. Therefore, one end surface of the main body 9, that is, one end surface of the metal portion 6 is attached to the inner surface of the metallicon electrode 3. In addition, the axial hole of the other metallicon electrode 4 has its axial center substantially coincident with the axial center of the core 1 for winding core, and its internal diameter substantially coincides with the outer diameter of the insulating portion 7. Therefore, the end portion 13 of the insulating portion 7 slightly protrudes from the outer end surface of the metallicon electrode 4.

また、コンデンサ素子５には、一対の導電性接続部材１５、１６が接続される。すなわち、一方の導電性接続部材１５は、鍔部１５ａと、この鍔部１５ａから突出されるねじ軸部１５ｂとからなり、このねじ軸部１５ｂが、巻芯用コア１の一方端部の金属部６の内周面に設けられたねじ部（図示省略）に螺合するとともに、鍔部１５ａをメタリコン電極３の外面に半田付けしている。 The capacitor element 5 is connected to a pair of conductive connection members 15 and 16. That is, one conductive connecting member 15 includes a flange portion 15a and a screw shaft portion 15b protruding from the flange portion 15a. The screw shaft portion 15b is a metal at one end portion of the core for core 1. The flange portion 15 a is screwed to the outer surface of the metallicon electrode 3 while being screwed into a screw portion (not shown) provided on the inner peripheral surface of the portion 6.

他方の導電性接続部材１６は、鍔部１６ａと、この鍔部１６ａから突出されるねじ軸部１６ｂと、鍔部１６ａからねじ軸部１６ｂと反対側に突出される接続用突出部１６ｃとからなる。そして、この導電性接続部材１６のねじ軸部１６ｂが、本体部９の他方端部側の内周面に設けられたねじ部（図示省略）に螺合して、導電性接続部材１６と、本体部９にて構成される金属部６とを接続する。この際、導電性接続部材１６とメタリコン電極４は絶縁部７で絶縁される。そして、導電性接続部材１６は電極引出し部材として外部との接続用に使用でき、また、メタリコン電極４に外部接続用の端子（図示省略）を接続して外部と結線することができる。 The other conductive connecting member 16 includes a flange portion 16a, a screw shaft portion 16b protruding from the flange portion 16a, and a connecting protrusion portion 16c protruding from the flange portion 16a to the opposite side of the screw shaft portion 16b. Become. Then, the screw shaft portion 16b of the conductive connecting member 16 is screwed into a screw portion (not shown) provided on the inner peripheral surface on the other end side of the main body portion 9, so that the conductive connecting member 16 and The metal part 6 constituted by the main body part 9 is connected. At this time, the conductive connecting member 16 and the metallicon electrode 4 are insulated by the insulating portion 7. The conductive connection member 16 can be used as an electrode lead member for connection to the outside, and a terminal for external connection (not shown) can be connected to the metallicon electrode 4 to be connected to the outside.

上記コンデンサによれば、他方のメタリコン電極４から一方のメタリコン電極３に電流を流せば、一方の導電性接続部材１５及び巻芯用コア１の金属部６を介して他方の導電性接続部材である電極引出し部材１６に流れる。すなわち、コンデンサ素子５の容量形成部２を流れる電流と巻芯用コア１を流れる電流とが逆向きに流れ、ＥＳＬが低減される。特に、巻芯用コア１の電流は、コンデンサ素子５の内部で、容量形成部２の電流と近接して流れることになり、ＥＳＬの低減効果がよい。また、コンデンサ素子５の中央部（軸心部）に導電性接続部材１５、１６、及び巻芯用コア１を配置することにより、変形しにくい強固なコンデンサが得られる。このように、上記巻芯用コア１を使用してコンデンサ素子５を製作することにより、ＥＳＬを低減したコンデンサが容易に得られる。 According to the capacitor, when a current is passed from the other metallicon electrode 4 to the one metallicon electrode 3, the other conductive connection member 15 is connected via the one conductive connection member 15 and the metal portion 6 of the core 1 for core. It flows to a certain electrode extraction member 16. That is, the current flowing through the capacitance forming portion 2 of the capacitor element 5 and the current flowing through the core for core 1 flow in opposite directions, and ESL is reduced. In particular, the current of the core for core 1 flows in the capacitor element 5 in close proximity to the current of the capacitance forming portion 2, and the ESL reduction effect is good. Further, by disposing the conductive connection members 15 and 16 and the core 1 for the core in the central portion (axial center portion) of the capacitor element 5, a strong capacitor that is difficult to deform can be obtained. Thus, by producing the capacitor element 5 using the core for core 1, the capacitor with reduced ESL can be easily obtained.

ところで、上記実施の形態では、巻芯用コア１の外面及び内面に段付き部が形成されていないが、他の実施の形態として、巻芯用コア１において、本体部９の外径と絶縁部７の外径とが相違するものであっても、本体部９の内径と絶縁部７の第２部１２の内径とが相違するものであってもよい。すなわち、外面や内面に段付き部があってもよい。これは、一方のメタリコン電極３と金属部６とが導通すると共に、金属部６と電極引出し部材１６とが導通し、かつ電極引出し部材１６と他方のメタリコン電極４とが絶縁部７で絶縁されればよいからである。なお、上記実施の形態のように巻芯用コア１の外面及び内面に段付き部が形成されないようにすれば、外面及び内面に段付き部がないので、この巻芯用コア１を使用したコンデンサ素子５の組立性（製造性）に優れる利点がある。 By the way, in the said embodiment, although the step part is not formed in the outer surface and inner surface of the core 1 for cores, in other embodiments, in the core 1 for cores, the outer diameter and insulation of the main-body part 9 are insulated. Even if the outer diameter of the part 7 is different, the inner diameter of the main body part 9 and the inner diameter of the second part 12 of the insulating part 7 may be different. That is, there may be a stepped portion on the outer surface or the inner surface. This is because one metallicon electrode 3 and the metal part 6 are electrically connected, the metal part 6 and the electrode leading member 16 are electrically connected, and the electrode leading member 16 and the other metallicon electrode 4 are insulated by the insulating part 7. This is because it is only necessary. If the stepped portions are not formed on the outer surface and the inner surface of the core 1 as in the above embodiment, the core 1 is used because there are no steps on the outer and inner surfaces. There is an advantage that the assembling property (manufacturability) of the capacitor element 5 is excellent.

以上にこの発明の具体的な実施の形態について説明したが、この発明は上記形態に限定されるものではなく、この発明の範囲内で種々変更して実施することができる。例えば、容量形成部２は、金属箔と誘導体フィルム、金属化フィルムと誘電体フィルム、または金属化フィルムのみの構成、もしくは金属化紙を含む構成等であってもよい。導電性接続部材１５、１６と巻芯用コア１の金属部６との接続は、ねじによる接続ではなく、軸部を押圧により金属部６に挿入し接続する等、他の方法でもよい。なお、巻芯用コア１の金属部６としては、導電性に優れた種々の金属を使用することができ、また、巻芯用コア１の絶縁部７としても絶縁性に優れた種々の樹脂を使用することができる。 Although specific embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, the capacity forming unit 2 may have a configuration including a metal foil and a derivative film, a metallized film and a dielectric film, or a metallized film alone, or a configuration including metallized paper. The connection between the conductive connection members 15 and 16 and the metal part 6 of the core 1 for core is not a screw connection, but may be another method such as inserting the shaft part into the metal part 6 by pressing. In addition, as the metal part 6 of the core 1 for cores, various metals excellent in conductivity can be used, and as the insulating part 7 of the core 1 for cores, various resins excellent in insulation. Can be used.

この発明の巻芯用コアを使用したコンデンサの実施形態を示す断面図である。It is sectional drawing which shows embodiment of the capacitor | condenser using the core for cores of this invention. 上記コンデンサの斜視図である。It is a perspective view of the capacitor. 従来のコンデンサの断面図である。It is sectional drawing of the conventional capacitor | condenser.

Explanation of symbols

１・・巻芯用コア、３、４・・メタリコン電極、５・・コンデンサ素子、６・・金属部、７・・絶縁部、１６・・電極引出し部材 1 .. Core for core, 3, 4 .. Metallicon electrode, 5 .. Capacitor element, 6 .. Metal part, 7 .. Insulating part, 16.

Claims

A core for cores of a capacitor, wherein one end is constituted by a metal part (6) and the other end is constituted by an insulating part (7).

A strip-shaped metal part constituting an electrode of a capacitor element (5) and a strip-like dielectric part constituting a dielectric of the capacitor element (5) are wound around the core for core (1) according to claim 1, and a metallicon electrode is formed on the end face. (3) (4) is formed, one metallicon electrode (3) and the metal part (6) of the core for core (1) are connected, and on the other metallicon electrode (4) side, A capacitor comprising an electrode lead member (16) which is electrically connected to the metal part (6) in the core for core (1) and is not electrically connected to the other metallicon electrode (4).