JP7209149B2 - capacitor - Google Patents

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JP7209149B2
JP7209149B2 JP2019543491A JP2019543491A JP7209149B2 JP 7209149 B2 JP7209149 B2 JP 7209149B2 JP 2019543491 A JP2019543491 A JP 2019543491A JP 2019543491 A JP2019543491 A JP 2019543491A JP 7209149 B2 JP7209149 B2 JP 7209149B2
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wall portion
wall
case
capacitor element
portions
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JPWO2019058846A1 (en
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亮佑 馬場
進 松本
正仁 佐野
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Panasonic Intellectual Property Management Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/10—Housing; Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/32—Wound capacitors

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Description

本開示は、コンデンサに関する。 The present disclosure relates to capacitors.

コンデンサ素子（コンデンサ素体）を収容するケース（容器）の周壁の一部または全部の外側に、当該周壁と隙間を有するように外壁を設けて、ケースを二重の壁構造としたコンデンサ（コンデンサ装置）が、たとえば、特許文献１に記載されている。かかるコンデンサでは、通電時にコンデンサ素子の振動に起因して発生し周壁の外に漏れ出た騒音（うなり音）を外壁で遮音することができる。 A capacitor with a double-wall structure in which an outer wall is provided outside part or all of the peripheral wall of a case (container) that houses a capacitor element (capacitor body) so as to have a gap with the peripheral wall. device) is described, for example, in US Pat. In such a capacitor, the outer wall can insulate the noise (beat noise) that is generated due to the vibration of the capacitor element and leaks to the outside of the peripheral wall when the capacitor is energized.

特開昭５５－１２４２２２号公報JP-A-55-124222

コンデンサ素子が振動したとき、その振動がケースの周壁に伝播し得る。特許文献１のコンデンサでは、周壁と外壁との間が、これら周壁と外壁とを全周に亘って取り囲む壁によって連結されており、このため、周壁が振動すると、その振動が、連結する壁を介して外壁に伝播しやすく、外壁自身から騒音が発生しやすかった。このため、特許文献１のコンデンサでは、全体として、コンデンサが発する騒音を効果的に低減することが難しかった。 When the capacitor element vibrates, the vibration can propagate to the peripheral wall of the case. In the capacitor of Patent Document 1, the peripheral wall and the outer wall are connected by a wall surrounding the entire circumference of the peripheral wall and the outer wall. It was easy for noise to propagate to the outer wall through the wall, and noise was likely to occur from the outer wall itself. For this reason, in the capacitor of Patent Document 1, it was difficult to effectively reduce the noise generated by the capacitor as a whole.

また、周壁から漏れて外壁に衝突した音は、外壁の内面に衝突して反射する。このとき、反射した音が、ケースの外方向に拡がってしまうと、ケースから漏れやすくなってしまう。 Moreover, the sound that leaks from the peripheral wall and collides with the outer wall collides with the inner surface of the outer wall and is reflected. At this time, if the reflected sound spreads outward from the case, it tends to leak from the case.

かかる課題に鑑み、本開示は、二重の壁構造のケースによる騒音の抑制効果を良好に得ることが期待できるコンデンサを提供する。 In view of such a problem, the present disclosure provides a capacitor that can be expected to obtain a favorable noise suppression effect from a double-walled case.

本開示の第１の態様に係るコンデンサは、コンデンサ素子と、コンデンサ素子が収容されるケースと、を備える。ケースは、周壁部と、外壁部と、複数の壁連結部と、を含む。外壁部は、ケースの周壁部の少なくとも一部の外側に、周壁部と隙間を有するように設けられる。複数の壁連結部は、周壁部と外壁部との間に部分的に設けられ、周壁部と外壁部とを連結する。 A capacitor according to a first aspect of the present disclosure includes a capacitor element and a case housing the capacitor element. The case includes a peripheral wall portion, an outer wall portion, and a plurality of wall connecting portions. The outer wall portion is provided outside at least a portion of the peripheral wall portion of the case so as to have a gap from the peripheral wall portion. A plurality of wall connecting portions are partially provided between the peripheral wall portion and the outer wall portion to connect the peripheral wall portion and the outer wall portion.

本開示の第２の態様に係るコンデンサは、コンデンサ素子と、コンデンサ素子が収容されるケースと、を備える。ケースは、周壁部と、周壁部の少なくとも一部の外側に、周壁部と隙間を有するように設けられた外壁部とを含む。外壁部の周壁部に対向する内壁面は、外壁部の外縁部から中央部に向かうに従って周壁部と離れる形状を有している。 A capacitor according to a second aspect of the present disclosure includes a capacitor element and a case housing the capacitor element. The case includes a peripheral wall portion and an outer wall portion provided outside at least a portion of the peripheral wall portion so as to have a gap from the peripheral wall portion. The inner wall surface facing the peripheral wall portion of the outer wall portion has a shape that separates from the peripheral wall portion as it goes from the outer edge portion toward the center portion of the outer wall portion.

本開示によれば、二重の壁構造のケースによる騒音の抑制効果を良好に得ることが期待できる。 According to the present disclosure, it can be expected that the noise suppressing effect of the double-walled case can be obtained satisfactorily.

本開示の効果ないし意義は、以下に示す実施の形態の説明により更に明らかとなろう。ただし、以下に示す実施の形態は、あくまでも、本開示を実施化する際の一つの例示であって、本開示は、以下の実施の形態に記載されたものに何ら制限されるものではない。 The effects and significance of the present disclosure will become clearer from the description of the embodiments shown below. However, the embodiment shown below is merely one example for implementing the present disclosure, and the present disclosure is not limited to the embodiments described below.

図１は、第１の実施の形態に係る、充填樹脂が充填される前のフィルムコンデンサの分解斜視図である。FIG. 1 is an exploded perspective view of a film capacitor before being filled with a filling resin according to the first embodiment. 図２は、第１の実施の形態に係る、中央部で切断されたフィルムコンデンサの正面断面図である。FIG. 2 is a front cross-sectional view of the film capacitor cut at the center according to the first embodiment. 図３Ａは、第１の実施の形態に係る、ケースの平面図である。3A is a plan view of a case according to the first embodiment; FIG. 図３Ｂは、第１の実施の形態に係る、ケースの底面図である。3B is a bottom view of the case according to the first embodiment; FIG. 図４Ａは、図３ＡのＡ－Ａ´断面図である。FIG. 4A is a cross-sectional view taken along line AA' of FIG. 3A. 図４Ｂは、図３ＡのＢ－Ｂ´断面図である。FIG. 4B is a cross-sectional view taken along line BB' of FIG. 3A. 図５Ａは、第１の実施の形態に係る、コンデンサ素子からの騒音を測定した際の測定条件について説明するための図である。FIG. 5A is a diagram for explaining measurement conditions when measuring noise from a capacitor element according to the first embodiment; 図５Ｂは、第１の実施の形態に係る、コンデンサ素子からの騒音を測定した結果を示す図である。5B is a diagram showing results of measuring noise from the capacitor element according to the first embodiment; FIG. 図６は、第１の実施の形態の変更例に係る、ケースの斜視図である。FIG. 6 is a perspective view of a case according to a modification of the first embodiment; 図７Ａは、第１の実施の形態の変更例に係る、ケースの平面図である。7A is a plan view of a case according to a modification of the first embodiment; FIG. 図７Ｂは、第１の実施の形態の変更例に係る、ケースの底面図である。7B is a bottom view of the case according to the modification of the first embodiment; FIG. 図８Ａは、図７ＡのＡ－Ａ´断面図である。FIG. 8A is a cross-sectional view taken along the line AA' of FIG. 7A. 図８Ｂは、図７ＡのＢ－Ｂ´断面図である。FIG. 8B is a cross-sectional view taken along line BB' of FIG. 7A. 図９は、第２の実施の形態に係る、充填樹脂が充填される前のフィルムコンデンサの分解斜視図である。FIG. 9 is an exploded perspective view of a film capacitor before being filled with a filling resin according to the second embodiment. 図１０は、第２の実施の形態に係る、中央部で切断されたフィルムコンデンサの正面断面図である。FIG. 10 is a front cross-sectional view of the film capacitor cut at the center according to the second embodiment. 図１１Ａは、第２の実施の形態に係る、ケースの平面図である。11A is a plan view of a case according to a second embodiment; FIG. 図１１Ｂは、第２の実施の形態に係る、ケースの底面図である。11B is a bottom view of the case according to the second embodiment. FIG. 図１２Ａは、図１１ＡのＡ－Ａ´断面図である。FIG. 12A is a cross-sectional view taken along the line AA' of FIG. 11A. 図１２Ｂは、図１１ＡのＢ－Ｂ´断面図である。FIG. 12B is a BB′ cross-sectional view of FIG. 11A. 図１３Ａは、第２の実施の形態に係る、コンデンサ素子からの騒音を測定した際の測定条件について説明するための図である。FIG. 13A is a diagram for explaining measurement conditions when measuring noise from a capacitor element according to the second embodiment. 図１３Ｂは、第２の実施の形態に係る、コンデンサ素子からの騒音を測定した結果を示す図である。FIG. 13B is a diagram showing results of measuring noise from the capacitor element according to the second embodiment. 図１４は、第２の実施の形態の変更例に係る、ケースの斜視図である。FIG. 14 is a perspective view of a case according to a modification of the second embodiment; 図１５Ａは、第２の実施の形態の変更例に係る、ケースの平面図である。15A is a plan view of a case according to a modification of the second embodiment; FIG. 図１５Ｂは、第２の実施の形態の変更例に係る、ケースの底面図である。15B is a bottom view of the case according to the modification of the second embodiment; FIG. 図１６Ａは、図１５ＡのＡ－Ａ´断面図である。FIG. 16A is a cross-sectional view taken along line AA' of FIG. 15A. 図１６Ｂは、図１５ＡのＢ－Ｂ´断面図である。FIG. 16B is a BB′ cross-sectional view of FIG. 15A. 図１７Ａは、第２の実施の形態の他の変更例に係る、ケースの構成について説明するため、ケースの正面断面図である。FIG. 17A is a front cross-sectional view of a case for explaining the configuration of the case according to another modification of the second embodiment. 図１７Ｂは、第２の実施の形態の他の変更例に係る、ケースの構成について説明するため、ケースの平面図である。FIG. 17B is a plan view of the case for explaining the configuration of the case according to another modification of the second embodiment. 図１８Ａは、第２の実施の形態の他の変更例に係る、ケースの構成について説明するため、ケースの平面図である。FIG. 18A is a plan view of a case for explaining the configuration of the case according to another modification of the second embodiment. 図１８Ｂは、第２の実施の形態の他の変更例に係る、ケースの構成について説明するため、ケースの平面図である。FIG. 18B is a plan view of the case for explaining the configuration of the case according to another modification of the second embodiment.

以下、本開示のコンデンサの実施形態であるフィルムコンデンサについて図を参照して説明する。便宜上、各図には、適宜、前後、左右および上下の方向が付記されている。なお、図示の方向は、あくまでフィルムコンデンサの相対的な方向を示すものであり、絶対的な方向を示すものではない。 A film capacitor, which is an embodiment of the capacitor of the present disclosure, will be described below with reference to the drawings. For convenience, front-rear, left-right, and up-down directions are indicated in each figure as appropriate. It should be noted that the illustrated directions only indicate relative directions of the film capacitors, and do not indicate absolute directions.

（第１の実施の形態）
本実施の形態において、第１端面電極１１および第２端面電極１２が、請求の範囲に記載の「端面電極」に対応する。また、前壁部３０４および後壁部３０５が、請求の範囲に記載の「第２壁部」に対応する。さらに、左壁部３０７および右壁部３０８が、請求の範囲に記載の「第１壁部」に対応する。さらに、左外壁部３１１および右外壁部３１２が、請求の範囲に記載の「外壁部」に対応する。さらに、左第１連結部３１３および右第１連結部３１５が、請求の範囲に記載の「壁連結部」および「第１連結部」に対応する。さらに、左第２連結部３１４および右第２連結部３１６が、請求の範囲に記載の「壁連結部」および「第２連結部」に対応する。(First embodiment)
In the present embodiment, the first edge electrode 11 and the second edge electrode 12 correspond to the "edge electrode" described in the claims. Further, the front wall portion 304 and the rear wall portion 305 correspond to the "second wall portion" described in the claims. Further, the left wall portion 307 and the right wall portion 308 correspond to the "first wall portion" described in the claims. Further, the left outer wall portion 311 and the right outer wall portion 312 correspond to the "outer wall portion" described in the claims. Further, the left first connecting portion 313 and the right first connecting portion 315 correspond to the "wall connecting portion" and the "first connecting portion" described in the claims. Further, the left second connecting portion 314 and the right second connecting portion 316 correspond to the "wall connecting portion" and the "second connecting portion" described in the claims.

ただし、上記記載は、あくまで、請求の範囲の構成と実施形態の構成とを対応付けることを目的とするものであって、上記対応付けによって請求の範囲が実施形態の構成に何ら限定されるものではない。 However, the above description is only for the purpose of associating the structure of the claims with the structure of the embodiment, and the above correspondence does not limit the scope of the claims to the structure of the embodiment. Absent.

図１は、本実施の形態に係る、充填樹脂４０が充填される前のフィルムコンデンサ１の分解斜視図である。図２は、本実施の形態に係る、中央部で切断されたフィルムコンデンサ１の正面断面図である。図３Ａおよび図３Ｂは、それぞれ、本実施の形態に係る、ケース３０の平面図および底面図である。図４Ａおよび図４Ｂは、それぞれ、図３ＡのＡ－Ａ´断面図およびＢ－Ｂ´断面図である。なお、図２では、便宜上、充填樹脂４０が透明な状態とされ、その上面部分のみが斜線で描かれている。また、図４Ｂでは、便宜上、コンデンサ素子１０の外形が一点鎖線により示されている。 FIG. 1 is an exploded perspective view of a film capacitor 1 before being filled with a filling resin 40 according to this embodiment. FIG. 2 is a front cross-sectional view of the film capacitor 1 cut at the center according to the present embodiment. 3A and 3B are respectively a plan view and a bottom view of case 30 according to the present embodiment. 4A and 4B are cross-sectional views along AA' and BB' of FIG. 3A, respectively. In FIG. 2, for the sake of convenience, the filling resin 40 is in a transparent state, and only its upper surface portion is hatched. In addition, in FIG. 4B, for convenience, the outline of the capacitor element 10 is indicated by a dashed line.

フィルムコンデンサ１は、コンデンサ素子１０と、一対のリード線端子２０と、ケース３０と、充填樹脂４０とを備える。図２のように、ケース３０内に、一対のリード線端子２０が接続されたコンデンサ素子１０が収容され、充填樹脂４０が充填される。充填樹脂４０は、たとえば、エポキシ樹脂等の熱硬化性樹脂からなり、溶融状態でケース３０内に注入され、ケース３０が加熱されることにより硬化する。充填樹脂４０は、コンデンサ素子１０と一対のリード線端子２０とを覆い、これらの部分を湿気や衝撃から保護する。一対のリード線端子２０の先端部は、充填樹脂４０に覆われず、ケース３０よりも上方に突出し、外部装置に設けられた接続部（図示せず）に接続される。 A film capacitor 1 includes a capacitor element 10 , a pair of lead wire terminals 20 , a case 30 and a filling resin 40 . As shown in FIG. 2, the capacitor element 10 to which the pair of lead wire terminals 20 are connected is accommodated in the case 30 and filled with the filling resin 40 . The filling resin 40 is made of, for example, a thermosetting resin such as an epoxy resin, is injected into the case 30 in a molten state, and hardens when the case 30 is heated. The filling resin 40 covers the capacitor element 10 and the pair of lead wire terminals 20 to protect these parts from moisture and impact. The tip portions of the pair of lead wire terminals 20 are not covered with the filling resin 40, protrude above the case 30, and are connected to a connection portion (not shown) provided in an external device.

コンデンサ素子１０は、誘電体フィルム上にアルミニウムを蒸着させた２枚の金属化フィルムを重ね、重ねた金属化フィルムを巻回することにより形成され、ほぼ円柱形状を有する。コンデンサ素子１０は、両端面が左右方向を向く状態でケース３０内に収容される。コンデンサ素子１０には、左側の端面に、亜鉛等の金属の吹付けにより第１端面電極１１が形成され、右側の端面に、同じく亜鉛等の金属の吹付けにより第２端面電極１２が形成される。 Capacitor element 10 is formed by stacking two metallized films in which aluminum is vapor-deposited on a dielectric film, and winding the stacked metallized films, and has a substantially cylindrical shape. Capacitor element 10 is accommodated in case 30 with both end surfaces facing in the left-right direction. The capacitor element 10 has a first end face electrode 11 formed on the left end face by spraying metal such as zinc, and a second end face electrode 12 formed on the right end face by similarly spraying metal such as zinc. be.

なお、コンデンサ素子１０は、誘電体フィルム上にアルミニウムを蒸着させた金属化フィルム以外にも、亜鉛、マグネシウム等の他の金属を蒸着させた金属化フィルムにより形成されてもよい。あるいは、コンデンサ素子１０は、これらの金属のうち、複数の金属を蒸着させた金属化フィルムにより形成されてもよいし、これらの金属どうしの合金を蒸着させた金属化フィルムにより形成されてもよい。 Capacitor element 10 may be formed of a metallized film obtained by vapor-depositing other metals such as zinc and magnesium instead of a metallized film obtained by vapor-depositing aluminum on a dielectric film. Alternatively, capacitor element 10 may be formed of a metallized film obtained by vapor-depositing a plurality of these metals, or may be formed of a metallized film obtained by vapor-depositing an alloy of these metals. .

一対のリード線端子２０は、丸棒状を有し、銅などの導電性に優れる心材を錫などのメッキ材で被覆することにより形成される。一方のリード線端子２０が半田付け、溶接等の接続方法により第１端面電極１１と電気的に接続され、他方のリード線端子２０が半田付け、溶接等の接続方法により第２端面電極１２と電気的に接続される。 The pair of lead wire terminals 20 has a round bar shape and is formed by coating a highly conductive core material such as copper with a plating material such as tin. One lead wire terminal 20 is electrically connected to the first end face electrode 11 by a connection method such as soldering or welding, and the other lead wire terminal 20 is electrically connected to the second end face electrode 12 by a connection method such as soldering or welding. electrically connected.

ケース３０は、耐湿性および耐熱性に優れる樹脂材料、たとえば、ポリフェニレンサルファイド（ＰＰＳ）により形成される。また、ケース３０は、たとえば、ポリブチレンテレフタレート（ＰＢＴ）により形成されてもよい。 Case 30 is made of a resin material having excellent moisture resistance and heat resistance, such as polyphenylene sulfide (PPS). Also, the case 30 may be made of, for example, polybutylene terephthalate (PBT).

ケース３０は、コンデンサ素子１０を収容する収容部３０１を有する。ケース３０の上面には、収容部３０１に通じる開口部３０２が形成される。収容部３０１を囲む周壁部３０３は、前壁部３０４と、後壁部３０５と、底壁部３０６と、左壁部３０７と、右壁部３０８とにより構成される。前壁部３０４、後壁部３０５および底壁部３０６は、コンデンサ素子１０の周面１３と対向する。底壁部３０６は、ケース３０において、開口部３０２の反対側に位置する。左壁部３０７はコンデンサ素子１０の第１端面電極１１に対向し、右壁部３０８はコンデンサ素子１０の第２端面電極１２に対向する。 Case 30 has a housing portion 301 that houses capacitor element 10 . The upper surface of the case 30 is formed with an opening 302 communicating with the accommodating portion 301 . A peripheral wall portion 303 surrounding the housing portion 301 is composed of a front wall portion 304 , a rear wall portion 305 , a bottom wall portion 306 , a left wall portion 307 and a right wall portion 308 . Front wall portion 304 , rear wall portion 305 and bottom wall portion 306 face peripheral surface 13 of capacitor element 10 . The bottom wall portion 306 is located on the opposite side of the opening 302 in the case 30 . Left wall portion 307 faces first end surface electrode 11 of capacitor element 10 , and right wall portion 308 faces second end surface electrode 12 of capacitor element 10 .

前壁部３０４および後壁部３０５は、ほぼ正方形状を有する。底壁部３０６は、やや横長の長方形状であり平坦な平坦部３０６ａと、平坦部３０６ａの前端および後端から、それぞれ、前壁部３０４および後壁部３０５へと繋がる円弧状の湾曲部３０６ｂとを含む。左壁部３０７および右壁部３０８は、前側および後側が湾曲する底壁部３０６の形状に対応するよう、その下部の前後の角部が大きな曲率半径の円弧形状に加工されたやや縦長の長方形状を有する。 Front wall 304 and rear wall 305 have a generally square shape. The bottom wall portion 306 has a slightly oblong rectangular flat portion 306a and an arc-shaped curved portion 306b that extends from the front end and rear end of the flat portion 306a to the front wall portion 304 and the rear wall portion 305, respectively. including. The left wall portion 307 and the right wall portion 308 are slightly vertically elongated rectangles whose lower front and rear corners are processed into an arc shape with a large radius of curvature so as to correspond to the shape of the bottom wall portion 306 whose front and rear sides are curved. have a shape.

底壁部３０６の内面には、左右の端部に前後に並ぶように２つずつ、合計４つの突出部３０９が、上方、即ち開口部３０２側に突出するように形成される。突出部３０９は、先端部が丸められた円柱状を有する。これら４つの突出部３０９により、収容部３０１（ケース３０）内のコンデンサ素子１０が支えられ、コンデンサ素子１０と底壁部３０６との間に隙間が形成される。また、前後２つの突出部３０９の間にコンデンサ素子１０の一部分が嵌り込む状態となるため、コンデンサ素子１０は、前壁部３０４と後壁部３０５との間に隙間を有する状態で、その前後の動きが規制される（図４Ｂ参照）。 On the inner surface of the bottom wall portion 306 , two protrusions 309 are formed on the left and right ends so as to line up in the front-rear direction, for a total of four protrusions 309 so as to protrude upward, that is, toward the opening 302 . The projecting portion 309 has a cylindrical shape with a rounded tip. These four projecting portions 309 support the capacitor element 10 in the housing portion 301 (case 30 ) and form a gap between the capacitor element 10 and the bottom wall portion 306 . In addition, since a part of capacitor element 10 is fitted between the two front and rear protrusions 309 , capacitor element 10 is in a state of having a gap between front wall portion 304 and rear wall portion 305 . movement is restricted (see FIG. 4B).

左壁部３０７および右壁部３０８の内面には、上下方向に延びるスリット状の３本の溝部３１０が、前後方向に並ぶように形成される。３本の溝部３１０のうち、中央の溝部３１０内に、コンデンサ素子１０に接続されたリード線端子２０が収容される。なお、コンデンサ素子１０の第１端面電極１１および第２端面電極１２に、それぞれ、２つのリード線端子２０が接続される場合がある。このような場合、３本の溝部３１０のうち、前後２つの溝部３１０内に、２つのリード線端子２０が収容されることになる。溝部３１０の上端部は、それより下側の部分よりも溝の幅および深さが大きな大溝部３１０ａとされる。大溝部３１０ａの下端の位置が、ケース３０内への充填樹脂４０の注入量の目安とされ、その位置に到達するまでケース３０内に充填樹脂４０が注入される（図２参照）。 On the inner surfaces of the left wall portion 307 and the right wall portion 308, three vertically extending slit-shaped grooves 310 are formed so as to be aligned in the front-rear direction. The lead wire terminal 20 connected to the capacitor element 10 is accommodated in the center groove portion 310 of the three groove portions 310 . Two lead wire terminals 20 may be connected to each of the first end face electrode 11 and the second end face electrode 12 of the capacitor element 10 . In such a case, two lead wire terminals 20 are accommodated in the front and rear two grooves 310 of the three grooves 310 . The upper end portion of the groove portion 310 is a large groove portion 310a having a greater groove width and depth than the lower portion. The position of the lower end of the large groove portion 310a is used as a guide for the injection amount of the filling resin 40 into the case 30, and the filling resin 40 is injected into the case 30 until reaching that position (see FIG. 2).

ケース３０には、左壁部３０７および右壁部３０８の外側に、それぞれ、左外壁部３１１および右外壁部３１２が設けられる。左壁部３０７および右壁部３０８と左外壁部３１１および右外壁部３１２との間には、所定の隙間が設けられる。左外壁部３１１および右外壁部３１２は、左壁部３０７および右壁部３０８と同様な形状および大きさを有する。左外壁部３１１および右外壁部３１２の厚さは、左壁部３０７および右壁部３０８の厚さと同じであってもよいし、左壁部３０７および右壁部３０８の厚さより小さくてもよいし大きくてもよい。 The case 30 is provided with a left wall portion 311 and a right wall portion 312 outside the left wall portion 307 and the right wall portion 308, respectively. A predetermined gap is provided between the left wall portion 307 and the right wall portion 308 and the left wall portion 311 and the right wall portion 312 . Left wall portion 311 and right wall portion 312 have the same shape and size as left wall portion 307 and right wall portion 308 . The thickness of the left wall portion 311 and the right wall portion 312 may be the same as the thickness of the left wall portion 307 and the right wall portion 308, or may be smaller than the thickness of the left wall portion 307 and the right wall portion 308. may be larger.

ケース３０は、左壁部３０７の外縁部と左外壁部３１１の外縁部との間に部分的（断続的）に設けられ、左壁部３０７と左外壁部３１１を連結する上側２つの左第１連結部３１３と下側２つの左第２連結部３１４とを含む。同様に、ケース３０は、右壁部３０８の外縁部と右外壁部３１２の外縁部との間に部分的（断続的）に設けられ、右壁部３０８と右外壁部３１２を連結する上側２つの右第１連結部３１５と下側２つの右第２連結部３１６とを含む。 The case 30 is partially (intermittently) provided between the outer edge of the left wall 307 and the outer edge of the left outer wall 311 , and has two upper left corners connecting the left wall 307 and the left outer wall 311 . It includes one connecting portion 313 and two left second connecting portions 314 on the lower side. Similarly, the case 30 is partially (intermittently) provided between the outer edge of the right wall portion 308 and the outer edge of the right outer wall portion 312 , and the upper side 2 that connects the right wall portion 308 and the right outer wall portion 312 . including two right first connecting portions 315 and two right second connecting portions 316 on the lower side.

２つの左第１連結部３１３は、左壁部３０７および左外壁部３１１の上端部において、前後方向（左外壁部３１１の壁面に沿う第１の方向）に間隔を有して並ぶ。一方の左第１連結部３１３は、左壁部３０７および左外壁部３１１の前端部に位置し、他方の左第１連結部３１３は、左壁部３０７および左外壁部３１１の後端部に位置する。また、２つの左第２連結部３１４は、２つの左第１連結部３１３と、上下方向（左外壁部３１１の壁面に沿い第１の方向に直交する第２の方向）に離れるように、左壁部３０７および左外壁部３１１の下端部に設けられ、この下端部において、前後方向に間隔を有して並ぶ。２つの左第２連結部３１４は、上下方向において２つの左第１連結部３１３と重ならないよう、前後方向において２つの左第１連結部３１３よりも内側（中央寄り）に位置する。 The two left first connecting portions 313 are arranged with a space therebetween in the front-rear direction (the first direction along the wall surface of the left wall portion 311 ) at the upper ends of the left wall portion 307 and the left wall portion 311 . One left first connecting portion 313 is positioned at the front ends of the left wall portion 307 and the left outer wall portion 311 , and the other left first connecting portion 313 is positioned at the rear end portions of the left wall portion 307 and the left outer wall portion 311 . To position. Also, the two left second connecting portions 314 are separated from the two left first connecting portions 313 in the vertical direction (the second direction perpendicular to the first direction along the wall surface of the left outer wall portion 311). They are provided at the lower end portions of the left wall portion 307 and the left outer wall portion 311, and are arranged at intervals in the front-rear direction at the lower end portions. The two left second connecting portions 314 are positioned inside (closer to the center) than the two left first connecting portions 313 in the front-rear direction so as not to overlap the two left first connecting portions 313 in the vertical direction.

右壁部３０８と右外壁部３１２との間における２つの右第１連結部３１５および２つの右第２連結部３１６の配置も、２つの左第１連結部３１３および２つの左第２連結部３１４の配置と同様である。 The arrangement of the two right first couplings 315 and the two right second couplings 316 between the right wall 308 and the right outer wall 312 is also the two left first couplings 313 and the two left second couplings. 314 arrangement.

左第１連結部３１３および右第１連結部３１５は、前後方向の厚みが、左壁部３０７側および右壁部３０８側の部分で大きく、左外壁部３１１側および右外壁部３１２側の側で小さい形状を有する。また、左第２連結部３１４および右第２連結部３１６は、左壁部３０７側および右壁部３０８側において、これら壁部３０７、３０８に形成されたリブ３１７、３１８と接続される。 The first left connecting portion 313 and the first right connecting portion 315 have a greater thickness in the front-rear direction on the left wall portion 307 side and the right wall portion 308 side, and on the left outer wall portion 311 side and the right outer wall portion 312 side. and has a small shape. The left second connecting portion 314 and the right second connecting portion 316 are connected to ribs 317 and 318 formed on the wall portions 307 and 308 on the left wall portion 307 side and the right wall portion 308 side, respectively.

フィルムコンデンサ１では、コンデンサ素子１０への通電時、コンデンサ素子１０が振動することにより、この振動に起因してコンデンサ素子１０から騒音（うなり音）が発生し得る。 In the film capacitor 1, when the capacitor element 10 vibrates when the capacitor element 10 is energized, noise (beat noise) may be generated from the capacitor element 10 due to the vibration.

図５Ａおよび図５Ｂは、本実施の形態に係る、コンデンサ素子１０からの騒音を測定した結果について説明するための図である。図５Ａは、測定条件について説明するための図であり、図５Ｂは、騒音の測定結果が示された表である。 5A and 5B are diagrams for explaining results of measuring noise from capacitor element 10 according to the present embodiment. FIG. 5A is a diagram for explaining measurement conditions, and FIG. 5B is a table showing noise measurement results.

図５Ａに示すように、コンデンサ素子１０を、直方体形状の測定ケースに収容し、コンデンサ素子１０の両端面（第１端面電極１１、第２端面電極１２）が向くＸ軸方向とコンデンサ素子１０の周面が向くＹ軸方向において測定ケースから漏れる騒音が測定された。ここで、測定ケースは、幅寸法（Ｘ軸方向の寸法）Ｗ、奥行寸法（Ｙ軸方向の寸法）Ｄおよび高さ寸法Ｈ（Ｚ軸方向の寸法）が、それぞれ、Ｗ＝５７．５ｍｍ、Ｄ＝４４．５ｍｍおよびＨ＝４４．５ｍｍであり、前後、左右および底の全壁部の肉厚ｔが、ｔ＝１ｍｍである。コンデンサ素子１０の端面および周面から測定器までのそれぞれの距離Ｌｘ、Ｌｙは、Ｌｘ＝Ｌｙ＝１０ｍｍである。測定の際には、直流電源およびリップル電源が用いられる。コンデンサ素子１０には、直流電源からＤＣ６５０Ｖの電圧が印加され、リップル電源から９Ａのリップル電流が印加される。 As shown in FIG. 5A, the capacitor element 10 is housed in a rectangular parallelepiped measurement case, and the X-axis direction in which both end surfaces (first end surface electrode 11, second end surface electrode 12) of the capacitor element 10 face and the direction of the capacitor element 10 are measured. The noise leaking from the measurement case was measured in the Y-axis direction in which the peripheral surface faces. Here, the measurement case has a width dimension (X-axis dimension) W, a depth dimension (Y-axis dimension) D and a height dimension H (Z-axis dimension) of W=57.5 mm, D=44.5 mm and H=44.5 mm, and the wall thickness t of all front, rear, left, right and bottom walls is t=1 mm. The respective distances Lx and Ly from the end face and peripheral face of capacitor element 10 to the measuring device are Lx=Ly=10 mm. A DC power supply and a ripple power supply are used in the measurement. A voltage of DC 650 V is applied to the capacitor element 10 from the DC power supply, and a ripple current of 9 A is applied from the ripple power supply.

図５Ｂに示すように、騒音測定の結果は、Ｘ軸方向の騒音の音圧が７５ｄＢ、Ｙ軸方向の騒音が７０ｄＢであった。 As shown in FIG. 5B, the result of the noise measurement was that the sound pressure of the noise in the X-axis direction was 75 dB, and the noise in the Y-axis direction was 70 dB.

上記の測定結果が示すように、コンデンサ素子１０では、両端面、即ち、第１端面電極１１および第２端面電極１２から発生する騒音が、コンデンサ素子１０の周面１３から発生する騒音よりも大きくなる。 As the above measurement results show, in the capacitor element 10 , the noise generated from both end surfaces, that is, the first end surface electrode 11 and the second end surface electrode 12 is louder than the noise generated from the peripheral surface 13 of the capacitor element 10 . Become.

フィルムコンデンサ１において、コンデンサ素子１０の第１端面電極１１および第２端面電極１２から発生した、相対的に大きな騒音は、左壁部３０７および右壁部３０８で遮音され、さらに、これらの壁部３０７、３０８から漏れた騒音が、左外壁部３１１および右外壁部３１２で遮音される。一方、コンデンサ素子１０の周面１３から発生した、相対的に小さな騒音は、前壁部３０４、後壁部３０５および底壁部３０６で遮音される。なお、ケース３０の開口部３０２側においては、充填樹脂４０の層が他の部分よりも厚いため、この厚い充填樹脂４０の層による遮音がなされる。 In the film capacitor 1, relatively large noise generated from the first end surface electrode 11 and the second end surface electrode 12 of the capacitor element 10 is insulated by the left wall portion 307 and the right wall portion 308. The noise leaked from 307 and 308 is insulated by the left wall portion 311 and the right wall portion 312 . On the other hand, relatively small noise generated from peripheral surface 13 of capacitor element 10 is insulated by front wall portion 304 , rear wall portion 305 and bottom wall portion 306 . Since the layer of the filling resin 40 is thicker than the other portions on the side of the opening 302 of the case 30, the thick layer of the filling resin 40 provides sound insulation.

また、コンデンサ素子１０が振動したとき、その振動が周壁部３０３（前壁部３０４、後壁部３０５、底壁部３０６、左壁部３０７および右壁部３０８）にも伝播して周壁部３０３が振動し得る。 Further, when capacitor element 10 vibrates, the vibration propagates to peripheral wall portion 303 (front wall portion 304, rear wall portion 305, bottom wall portion 306, left wall portion 307, and right wall portion 308). can vibrate.

ケース３０では、左壁部３０７の外縁部と左外壁部３１１の外縁部との間が、２つの左第１連結部３１３と２つの左第２連結部３１４とにより部分的に連結されるのみであり、右壁部３０８の外縁部と右外壁部３１２の外縁部との間が、２つの右第１連結部３１５と２つの右第２連結部３１６とにより部分的に連結されるのみである。即ち、左壁部３０７と左外壁部３１１との間および右壁部３０８と右外壁部３１２との間は、全周に亘って壁部に覆われるような状態ではなく、前後および上下のほとんどの部分が開放された状態となる。このため、左壁部３０７が振動したとき、この振動は左第１連結部３１３と左第２連結部３１４とを介して左外壁部３１１に僅かに伝播するのみであり、右壁部３０８が振動したとき、この振動は右第１連結部３１５と右第２連結部３１６とを介して右外壁部３１２に僅かに伝播するのみである。よって、左壁部３０７および右壁部３０８の振動が、左外壁部３１１および右外壁部３１２に伝播しにくいため、振動に起因する騒音が左外壁部３１１および右外壁部３１２から発生しにくい。 In the case 30, the outer edge of the left wall portion 307 and the outer edge of the left outer wall portion 311 are only partially connected by two left first connecting portions 313 and two left second connecting portions 314. , and the outer edge of the right wall portion 308 and the outer edge of the right outer wall portion 312 are only partially connected by two right first connecting portions 315 and two right second connecting portions 316. be. That is, the space between the left wall portion 307 and the left wall portion 311 and between the right wall portion 308 and the right wall portion 312 are not entirely covered by the walls, and most of the front, rear, top and bottom are covered. is opened. Therefore, when the left wall portion 307 vibrates, the vibration only slightly propagates to the left outer wall portion 311 via the left first connecting portion 313 and the left second connecting portion 314, and the right wall portion 308 vibrates. When vibrating, this vibration is only slightly propagated to the right outer wall portion 312 via the right first connecting portion 315 and the right second connecting portion 316 . Therefore, the vibrations of the left wall portion 307 and the right wall portion 308 are less likely to propagate to the left outer wall portion 311 and the right outer wall portion 312 , so that the left outer wall portion 311 and the right outer wall portion 312 are less likely to generate noise due to the vibrations.

＜実施の形態の効果＞
以上、本実施の形態によれば、以下の効果が奏される。<Effect of Embodiment>
As described above, according to the present embodiment, the following effects can be obtained.

ケース３０には、周壁部３０３の一部である左壁部３０７および右壁部３０８の外側に、隙間を有する状態で左外壁部３１１および右外壁部３１２が設けられているので、左壁部３０７および右壁部３０８から漏れた騒音を、左外壁部３１１および右外壁部３１２により遮音することができる。これにより、ケース３０からのコンデンサ素子１０の振動に起因する騒音の漏れを抑制することができる。 Case 30 is provided with left wall portion 311 and right wall portion 312 outside left wall portion 307 and right wall portion 308, which are part of peripheral wall portion 303, with a gap therebetween. The noise leaked from 307 and right wall 308 can be insulated by left wall 311 and right wall 312 . As a result, leakage of noise caused by vibration of capacitor element 10 from case 30 can be suppressed.

また、左壁部３０７と左外壁部３１１との間は、２つの左第１連結部３１３と２つの左第２連結部３１４とにより部分的に連結されるのみであり、右壁部３０８と右外壁部３１２との間は、２つの右第１連結部３１５と２つの右第２連結部３１６とにより部分的に連結されるのみである。このため、コンデンサ素子１０からの振動が伝播し、左壁部３０７および右壁部３０８が振動しても、この振動が左外壁部３１１および右外壁部３１２に伝播しにくい。よって、振動に起因する騒音が左外壁部３１１および右外壁部３１２から発生しにくくなるので、ケース３０からの騒音の漏れを、一層、抑制することができる。 Further, the left wall portion 307 and the left outer wall portion 311 are only partially connected by two left first connecting portions 313 and two left second connecting portions 314, and the right wall portion 308 and The right outer wall portion 312 is only partially connected by two right first connecting portions 315 and two right second connecting portions 316 . Therefore, even if vibration from capacitor element 10 propagates and left wall portion 307 and right wall portion 308 vibrate, this vibration is less likely to propagate to left wall portion 311 and right wall portion 312 . Therefore, noise caused by vibration is less likely to be generated from the left outer wall portion 311 and the right outer wall portion 312, so that leakage of noise from the case 30 can be further suppressed.

さらに、ケース３０には、相対的に大きな騒音が発生するコンデンサ素子１０の第１端面電極１１および第２端面電極１２に対向する左壁部３０７および右壁部３０８の外側に左外壁部３１１および右外壁部３１２が設けられ、相対的に小さな騒音が発生するコンデンサ素子１０の周面１３に対向する前壁部３０４、後壁部３０５および底壁部３０６の外側には外壁部が設けられない。これにより、二重の壁構造とすることによるケース３０のサイズ増加を極力抑えつつ、ケース３０から漏れる騒音を低減させることができる。 Furthermore, case 30 has left wall portion 311 and left wall portion 311 outside left wall portion 307 and right wall portion 308 facing first end face electrode 11 and second end face electrode 12 of capacitor element 10 that generate relatively large noise. A right outer wall portion 312 is provided, and no outer wall portion is provided outside the front wall portion 304, the rear wall portion 305, and the bottom wall portion 306 facing the peripheral surface 13 of the capacitor element 10 where relatively small noise is generated. . As a result, noise leaking from the case 30 can be reduced while minimizing an increase in the size of the case 30 due to the double wall structure.

さらに、２つの左第２連結部３１４および２つの右第２連結部３１６が、それぞれ、上下方向において２つの左第１連結部３１３および２つの右第１連結部３１５と重ならないように設けられているので、上下方向に分割される金型を用いた樹脂成形により、ケース３０を容易に形成することができる。 Furthermore, two left second connecting portions 314 and two right second connecting portions 316 are provided so as not to overlap the two left first connecting portions 313 and two right first connecting portions 315, respectively, in the vertical direction. Therefore, the case 30 can be easily formed by resin molding using a vertically split mold.

さらに、前後方向において、２つの左第１連結部３１３（２つの右第１連結部３１５）が相対的に外側に位置し、２つの左第２連結部３１４（２つの右第２連結部３１６）が相対的に内側に位置するので、左外壁部３１１（右外壁部３１２）の上側では前後方向における外側の剛性が高まり、左外壁部３１１（右外壁部３１２）の下側では前後方向における内側の剛性が高まり、全体的として左外壁部３１１（右外壁部３１２）の前後方向における内外の剛性が高まる。よって、左外壁部３１１（右外壁部３１２）が振動しにくくなる。 Furthermore, in the front-rear direction, the two left first connecting portions 313 (two right first connecting portions 315) are positioned relatively outside, and the two left second connecting portions 314 (two right second connecting portions 316) are positioned relatively outward. ) are positioned relatively inward, the rigidity of the outer side in the front-rear direction increases on the upper side of the left outer wall section 311 (the right outer wall section 312), and The inner rigidity is increased, and the inner and outer rigidity of the left outer wall portion 311 (right outer wall portion 312) in the front-rear direction is increased as a whole. Therefore, the left outer wall portion 311 (right outer wall portion 312) is less likely to vibrate.

なお、２つの左第１連結部３１３（２つの右第１連結部３１５）および２つの左第２連結部３１４（２つの右第２連結部３１６）が共に前後方向における外側（端寄り）に位置する場合、左外壁部３１１（右外壁部３１２）の前後方向における内側（中央寄り）の部分の剛性が弱くなって内側が振動しやすくなる。反対に、２つの左第１連結部３１３（２つの右第１連結部３１５）および２つの左第２連結部３１４（２つの右第２連結部３１６）が共に前後方向における内側（中央寄り）に位置する場合、左外壁部３１１（右外壁部３１２）の前後方向における外側（端寄り）の部分の剛性が弱くなって外側が振動しやすくなる。 Note that the two left first connecting portions 313 (two right first connecting portions 315) and the two left second connecting portions 314 (two right second connecting portions 316) are both positioned outward (closer to the ends) in the front-rear direction. In this case, the rigidity of the inner side (closer to the center) in the front-rear direction of the left outer wall section 311 (right outer wall section 312) is weakened, and the inner side is likely to vibrate. On the contrary, the two left first connecting portions 313 (the two right first connecting portions 315) and the two left second connecting portions 314 (the two right second connecting portions 316) are both inside (close to the center) in the front-rear direction. , the rigidity of the outer (closer to the end) portion of the left outer wall portion 311 (right outer wall portion 312) in the front-rear direction is weakened, and the outer side tends to vibrate.

さらに、ケース３０内において、コンデンサ素子１０は、４つの突出部３０９により、コンデンサ素子１０と底壁部３０６との間に隙間が形成されるように支えられるので、コンデンサ素子１０の周面１３が直接、底壁部３０６に接触することを防止できる。これにより、コンデンサ素子１０が振動したときに、その振動が底壁部３０６に伝播しにくくなり、底壁部３０６が振動しにくくなる。なお、突出部３０９の形状および個数は、コンデンサ素子１０を、コンデンサ素子１０と底壁部３０６との間に隙間が形成されるように支えられるのであれば、如何なる形状および個数であってもよい。 Furthermore, within the case 30, the capacitor element 10 is supported by the four projecting portions 309 so that a gap is formed between the capacitor element 10 and the bottom wall portion 306, so that the peripheral surface 13 of the capacitor element 10 is Direct contact with the bottom wall portion 306 can be prevented. As a result, when capacitor element 10 vibrates, the vibration is less likely to propagate to bottom wall portion 306, and bottom wall portion 306 is less likely to vibrate. The shape and the number of projecting portions 309 may be any shape and number as long as capacitor element 10 is supported so that a gap is formed between capacitor element 10 and bottom wall portion 306. .

以上、本開示の実施の形態について説明したが、本開示は、上記実施の形態に限定されるものではなく、また、本開示の適用例も、上記実施の形態の他に、種々の変更が可能である。 Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and the application examples of the present disclosure may be modified in various ways in addition to the above embodiments. It is possible.

＜第１の実施の形態の変更例＞
図６は、第１の実施の形態の変更例に係る、ケース５０の斜視図である。図７Ａおよび図７Ｂは、それぞれ、本変更例に係る、ケース５０の平面図および底面図である。図８Ａおよび図８Ｂは、それぞれ、図７ＡのＡ－Ａ´断面図およびＢ－Ｂ´断面図である。<Modification example of the first embodiment>
FIG. 6 is a perspective view of case 50 according to a modification of the first embodiment. 7A and 7B are respectively a plan view and a bottom view of case 50 according to this modification. 8A and 8B are cross-sectional views along AA' and BB' of FIG. 7A, respectively.

上記実施の形態のケース３０に替えて、本変更例のケース５０が、フィルムコンデンサ１に備えられてもよい。 The film capacitor 1 may be provided with a case 50 of this modification instead of the case 30 of the above embodiment.

なお、本変更例において、前壁部５０４および後壁部５０５が、請求の範囲に記載の「第２壁部」に対応する。また、左壁部５０７および右壁部５０８が、請求の範囲に記載の「第１壁部」に対応する。さらに、左外壁部５１１、右外壁部５１２、前外壁部５１３および後外壁部５１４が、請求の範囲に記載の「外壁部」に対応する。さらに、左第１連結部５１５、右第１連結部５１７、前第１連結部５１９および後第１連結部５２１が、請求の範囲に記載の「壁連結部」および「第１連結部」に対応する。さらに、左第２連結部５１６、右第２連結部５１８、前第２連結部５２０および後第２連結部５２２が、請求の範囲に記載の「壁連結部」および「第２連結部」に対応する。 In addition, in this modified example, the front wall portion 504 and the rear wall portion 505 correspond to the "second wall portion" described in the claims. Also, the left wall portion 507 and the right wall portion 508 correspond to the "first wall portion" described in the claims. Further, the left outer wall portion 511, the right outer wall portion 512, the front outer wall portion 513, and the rear outer wall portion 514 correspond to the "outer wall portion" described in the claims. Furthermore, the first left connecting portion 515, the first right connecting portion 517, the first front connecting portion 519, and the first rear connecting portion 521 are the “wall connecting portion” and the “first connecting portion” described in the claims. handle. Furthermore, the second left connecting portion 516, the second right connecting portion 518, the second front connecting portion 520, and the second rear connecting portion 522 are the “wall connecting portion” and the “second connecting portion” described in the claims. handle.

ケース５０は、耐湿性および耐熱性に優れる樹脂材料、たとえば、ポリフェニレンサルファイド（ＰＰＳ）、ポリブチレンテレフタレート（ＰＢＴ）などにより形成される。 Case 50 is made of a resin material having excellent moisture resistance and heat resistance, such as polyphenylene sulfide (PPS) and polybutylene terephthalate (PBT).

ケース５０は、コンデンサ素子１０を収容する収容部５０１を有し、開口部５０２が収容部５０１に通じる。収容部５０１を囲む周壁部５０３は、前壁部５０４と、後壁部５０５と、底壁部５０６と、左壁部５０７と、右壁部５０８とにより構成される。前壁部５０４、後壁部５０５および底壁部５０６は、コンデンサ素子１０の周面１３と対向する。底壁部５０６は、ケース５０において、開口部５０２の反対側に位置する。左壁部５０７はコンデンサ素子１０の第１端面電極１１に対向し、右壁部５０８はコンデンサ素子１０の第２端面電極１２に対向する。 Case 50 has a housing portion 501 housing capacitor element 10 , and an opening 502 communicates with housing portion 501 . A peripheral wall portion 503 surrounding the housing portion 501 is composed of a front wall portion 504 , a rear wall portion 505 , a bottom wall portion 506 , a left wall portion 507 and a right wall portion 508 . Front wall portion 504 , rear wall portion 505 and bottom wall portion 506 face peripheral surface 13 of capacitor element 10 . The bottom wall portion 506 is located on the opposite side of the opening 502 in the case 50 . Left wall portion 507 faces first end surface electrode 11 of capacitor element 10 , and right wall portion 508 faces second end surface electrode 12 of capacitor element 10 .

前壁部５０４、後壁部５０５および底壁部５０６は、ほぼ正方形状を有する。左壁部３０７および右壁部３０８は、やや縦長の長方形状を有する。 Front wall 504, rear wall 505 and bottom wall 506 have a substantially square shape. The left wall portion 307 and the right wall portion 308 have a slightly elongated rectangular shape.

底壁部５０６の内面には、上記実施の形態のケース３０の底壁部３０６と同様、４つの突出部５０９が設けられる。これら４つの突出部５０９により、収容部５０１（ケース５０）内のコンデンサ素子１０が支えられ、コンデンサ素子１０と底壁部５０６との間に隙間が形成される。また、前後２つの突出部５０９の間にコンデンサ素子１０の一部分が嵌り込む状態となるため、コンデンサ素子１０は、前壁部５０４と後壁部５０５との間に隙間を有する状態で、その前後の動きが規制される（図８Ｂ参照）。左壁部５０７および右壁部５０８の内面には、上記実施の形態のケース３０の左壁部３０７および右壁部３０８と同様、３本の溝部５１０が設けられ、溝部５１０の上端部が大溝部５１０ａとされる。 The inner surface of the bottom wall portion 506 is provided with four projecting portions 509 similarly to the bottom wall portion 306 of the case 30 of the above-described embodiment. These four projecting portions 509 support the capacitor element 10 in the housing portion 501 (case 50 ) and form a gap between the capacitor element 10 and the bottom wall portion 506 . Further, since a portion of capacitor element 10 is fitted between the two projecting portions 509 on the front and rear sides, capacitor element 10 has a gap between front wall portion 504 and rear wall portion 505 . movement is restricted (see FIG. 8B). Three groove portions 510 are provided on the inner surfaces of the left wall portion 507 and the right wall portion 508, similarly to the left wall portion 307 and the right wall portion 308 of the case 30 of the above-described embodiment, and the upper ends of the groove portions 510 are large. A groove portion 510a is formed.

ケース５０には、左壁部５０７および右壁部５０８の外側に、それぞれ、左外壁部５１１および右外壁部５１２が設けられ、前壁部５０４および後壁部５０５の外側に、それぞれ、前外壁部５１３および後外壁部５１４が設けられる。左壁部５０７および右壁部５０８と左外壁部５１１および右外壁部５１２との間、並びに前壁部５０４および後壁部５０５と前外壁部５１３および後外壁部５１４との間には、所定の隙間が設けられる。左外壁部５１１、右外壁部５１２、前外壁部５１３および後外壁部５１４は、左壁部５０７、右壁部５０８、前壁部５０４および後壁部５０５と同様な形状および大きさを有する。左外壁部５１１、右外壁部５１２、前外壁部５１３および後外壁部５１４の厚さは、左壁部５０７、右壁部５０８、前壁部５０４および後壁部５０５の厚さと同じであってもよいし、左壁部５０７、右壁部５０８、前壁部５０４および後壁部５０５の厚さより小さくてもよいし大きくてもよい。 The case 50 is provided with a left outer wall portion 511 and a right outer wall portion 512 on the outer sides of the left wall portion 507 and the right wall portion 508, respectively, and a front outer wall portion on the outer sides of the front wall portion 504 and the rear wall portion 505, respectively. A portion 513 and a rear wall portion 514 are provided. Between the left wall portion 507 and the right wall portion 508 and the left wall portion 511 and the right wall portion 512, and between the front wall portion 504 and the rear wall portion 505 and the front wall portion 513 and the rear wall portion 514, predetermined A gap is provided. Left wall portion 511 , right wall portion 512 , front wall portion 513 and rear wall portion 514 have the same shape and size as left wall portion 507 , right wall portion 508 , front wall portion 504 and rear wall portion 505 . The left wall portion 511, the right wall portion 512, the front wall portion 513 and the rear wall portion 514 have the same thickness as the left wall portion 507, the right wall portion 508, the front wall portion 504 and the rear wall portion 505. , or may be smaller or larger than the thickness of the left wall portion 507 , right wall portion 508 , front wall portion 504 and rear wall portion 505 .

ケース５０は、左壁部５０７の外縁部と左外壁部５１１の外縁部との間に部分的（断続的）に設けられ、左壁部５０７と左外壁部５１１を連結する上側２つの左第１連結部５１５と下側２つの左第２連結部５１６とを含む。また、ケース５０は、右壁部５０８の外縁部と右外壁部５１２の外縁部との間に部分的（断続的）に設けられ、右壁部５０８と右外壁部５１２を連結する上側２つの右第１連結部５１７と下側２つの右第２連結部５１８とを含む。さらに、ケース５０は、前壁部５０４の外縁部と前外壁部５１３の外縁部との間に部分的（断続的）に設けられ、前壁部５０４と前外壁部５１３を連結する上側２つの前第１連結部５１９と下側２つの前第２連結部５２０とを含む。さらに、ケース５０は、後壁部５０５の外縁部と後外壁部５１４の外縁部との間に部分的（断続的）に設けられ、後壁部５０５と後外壁部５１４を連結する上側２つの後第１連結部５２１と下側２つの後第２連結部５２２とを含む。 The case 50 is partially (intermittently) provided between the outer edge of the left wall portion 507 and the outer edge of the left outer wall portion 511 , and has two upper left corners connecting the left wall portion 507 and the left outer wall portion 511 . It includes one connecting portion 515 and two left second connecting portions 516 on the lower side. Further, the case 50 is partially (intermittently) provided between the outer edge portion of the right wall portion 508 and the outer edge portion of the right outer wall portion 512, and connects the right wall portion 508 and the right outer wall portion 512 to the upper two parts. It includes a right first connecting portion 517 and two right second connecting portions 518 on the lower side. Further, the case 50 is partially (intermittently) provided between the outer edge of the front wall portion 504 and the outer edge of the front outer wall portion 513, and connects the front wall portion 504 and the front outer wall portion 513 to two upper side portions. It includes a front first connecting portion 519 and two front second connecting portions 520 on the lower side. Further, the case 50 is partially (intermittently) provided between the outer edge of the rear wall portion 505 and the outer edge of the rear outer wall portion 514, and connects the rear wall portion 505 and the rear outer wall portion 514 to each other. It includes a rear first connecting portion 521 and two rear second connecting portions 522 on the lower side.

２つの左第１連結部５１５は、左壁部５０７および左外壁部５１１の上端部において、前後方向（左外壁部５１１の壁面に沿う第１の方向）に間隔を有して並ぶ。一方の左第１連結部５１５は、左壁部５０７および左外壁部５１１の前端部に位置し、他方の左第１連結部５１５は、左壁部５０７および左外壁部５１１の後端部に位置する。また、２つの左第２連結部５１６は、２つの左第１連結部５１５と、上下方向（左外壁部５１１の壁面に沿い第１の方向に直交する第２の方向）に離れるように、左壁部５０７および左外壁部５１１の下端部に設けられ、この下端部において、前後方向に間隔を有して並ぶ。２つの左第２連結部５１６は、上下方向において２つの左第１連結部５１５と重ならないよう、前後方向において２つの左第１連結部５１５よりも内側（中央寄り）に位置する。 The two left first connecting portions 515 are arranged at intervals in the front-rear direction (the first direction along the wall surface of the left outer wall portion 511) at the upper end portions of the left wall portion 507 and the left outer wall portion 511 . One left first connecting portion 515 is positioned at the front ends of the left wall portion 507 and the left outer wall portion 511 , and the other left first connecting portion 515 is positioned at the rear end portions of the left wall portion 507 and the left outer wall portion 511 . To position. In addition, the two left second connecting portions 516 are separated from the two left first connecting portions 515 in the vertical direction (the second direction perpendicular to the first direction along the wall surface of the left outer wall portion 511). They are provided at the lower ends of the left wall portion 507 and the left outer wall portion 511, and are arranged at intervals in the front-rear direction at the lower ends. The two left second connecting portions 516 are positioned inside (closer to the center) than the two left first connecting portions 515 in the front-rear direction so as not to overlap the two left first connecting portions 515 in the vertical direction.

右壁部５０８と右外壁部５１２との間における２つの右第１連結部５１７および２つの右第２連結部５１８の配置も、２つの左第１連結部５１５および２つの左第２連結部５１６の配置と同様である。 The arrangement of two right first couplings 517 and two right second couplings 518 between the right wall portion 508 and the right outer wall portion 512 is also two left first couplings 515 and two left second couplings. 516 arrangement.

左第１連結部５１５および右第１連結部５１７は、前後方向の厚みが、左壁部５０７側および右壁部５０８側の部分で大きく、左外壁部５１１側および右外壁部５１２側の側で小さい形状を有する。また、左第２連結部５１６および右第２連結部５１８は、左壁部５０７側および右壁部５０８側において、これら壁部５０７、５０８に形成されたリブ５２３、５２４と接続される。 The first left connecting portion 515 and the first right connecting portion 517 have a greater thickness in the front-rear direction on the left wall portion 507 side and the right wall portion 508 side, and on the left outer wall portion 511 side and the right outer wall portion 512 side. and has a small shape. The left second connecting portion 516 and the right second connecting portion 518 are connected to ribs 523 and 524 formed on the wall portions 507 and 508 on the left wall portion 507 side and the right wall portion 508 side, respectively.

２つの前第１連結部５１９は、前壁部５０４および前外壁部５１３の上端部において、左右方向（前外壁部５１３の壁面に沿う第１の方向）に間隔を有して並ぶ。一方の前第１連結部５１９は、前壁部５０４および前外壁部５１３の左端部に位置し、他方の前第１連結部５１９は、前壁部５０４および前外壁部５１３の右端部に位置する。また、２つの前第２連結部５２０は、２つの前第１連結部５１９と、上下方向（前外壁部５１３の壁面に沿い第１の方向に直交する第２の方向）に離れるように、前壁部５０４および前外壁部５１３の下端部に設けられ、この下端部において、左右方向に間隔を有して並ぶ。２つの前第２連結部５２０は、上下方向において２つの前第１連結部５１９と重ならないよう、左右方向において２つの前第１連結部５１９よりも内側（中央寄り）に位置する。 The two front first connecting portions 519 are spaced apart in the left-right direction (first direction along the wall surface of the front wall portion 513 ) at the upper end portions of the front wall portion 504 and the front wall portion 513 . One front first connecting portion 519 is positioned at the left end of the front wall portion 504 and the front outer wall portion 513, and the other front first connecting portion 519 is positioned at the right end of the front wall portion 504 and the front outer wall portion 513. do. Also, the two front second connecting portions 520 are separated from the two front first connecting portions 519 in the vertical direction (the second direction orthogonal to the first direction along the wall surface of the front outer wall portion 513). They are provided at the lower end portions of the front wall portion 504 and the front outer wall portion 513, and are arranged at intervals in the left-right direction at the lower end portions. The two front second connecting portions 520 are positioned inside (closer to the center) than the two front first connecting portions 519 in the left-right direction so as not to overlap the two front first connecting portions 519 in the vertical direction.

後壁部５０５と後外壁部５１４との間における２つの後第１連結部５２１および２つの後第２連結部５２２の配置も、２つの前第１連結部５１９および２つの前第２連結部５２０の配置と同様である。 The arrangement of the two rear first connecting portions 521 and the two rear second connecting portions 522 between the rear wall portion 505 and the rear wall portion 514 is also two front first connecting portions 519 and two front second connecting portions. 520 arrangement.

ケース５０が備えられたフィルムコンデンサ１において、コンデンサ素子１０の第１端面電極１１および第２端面電極１２から発生した、相対的に大きな騒音は、左壁部５０７および右壁部５０８で遮音され、さらに、これらの壁部５０７、５０８から漏れた騒音が、左外壁部５１１および右外壁部５１２で遮音される。一方、コンデンサ素子１０の周面１３から発生した、相対的に小さな騒音は、前壁部５０４、後壁部５０５および底壁部５０６で遮音される。さらに、前壁部５０４および後壁部５０５から漏れた騒音が、前外壁部５１３および後外壁部５１４で遮音される。なお、ケース５０の開口部５０２側においては、充填樹脂４０の層が他の部分よりも厚いため、この厚い充填樹脂４０の層による遮音がなされる。 In the film capacitor 1 provided with the case 50, relatively large noise generated from the first end surface electrode 11 and the second end surface electrode 12 of the capacitor element 10 is insulated by the left wall portion 507 and the right wall portion 508, Furthermore, the noise leaked from these walls 507 and 508 is insulated by the left wall 511 and the right wall 512 . On the other hand, relatively small noise generated from peripheral surface 13 of capacitor element 10 is insulated by front wall portion 504 , rear wall portion 505 and bottom wall portion 506 . Further, noise leaked from the front wall portion 504 and the rear wall portion 505 is insulated by the front wall portion 513 and the rear wall portion 514 . Since the layer of the filling resin 40 is thicker than the other portions on the side of the opening 502 of the case 50, the thick layer of the filling resin 40 provides sound insulation.

また、コンデンサ素子１０が振動したとき、その振動が周壁部５０３（前壁部５０４、後壁部５０５、底壁部５０６、左壁部５０７および右壁部５０８）にも伝播して周壁部５０３が振動し得る。 Further, when capacitor element 10 vibrates, the vibration propagates to peripheral wall portion 503 (front wall portion 504, rear wall portion 505, bottom wall portion 506, left wall portion 507, and right wall portion 508). can vibrate.

ケース５０では、左壁部５０７の外縁部と左外壁部５１１の外縁部との間が、２つの左第１連結部５１５と２つの左第２連結部５１６とにより部分的に連結されるのみであり、右壁部５０８の外縁部と右外壁部５１２の外縁部との間が、２つの右第１連結部５１７と２つの右第２連結部５１８とにより部分的に連結されるのみである。よって、左壁部５０７および右壁部５０８の振動が、左外壁部５１１および右外壁部５１２に伝播しにくいため、振動に起因する騒音が左外壁部５１１および右外壁部５１２から発生しにくい。同様に、ケース５０では、前壁部５０４の外縁部と前外壁部５１３の外縁部との間が、２つの前第１連結部５１９と２つの前第２連結部５２０とにより部分的に連結されるのみであり、後壁部５０５の外縁部と後外壁部５１４の外縁部との間が、２つの後第１連結部５２１と２つの後第２連結部５２２とにより部分的に連結されるのみである。よって、前壁部５０４および後壁部５０５の振動が、前外壁部５１３および後外壁部５１４に伝播しにくいため、振動に起因する騒音が前外壁部５１３および後外壁部５１４から発生しにくい。 In the case 50, the outer edge of the left wall portion 507 and the outer edge of the left outer wall portion 511 are only partially connected by two left first connecting portions 515 and two left second connecting portions 516. , and the outer edge of the right wall portion 508 and the outer edge of the right outer wall portion 512 are only partially connected by two right first connecting portions 517 and two right second connecting portions 518. be. Therefore, the vibrations of the left wall portion 507 and the right wall portion 508 are less likely to propagate to the left outer wall portion 511 and the right outer wall portion 512 , so that the left outer wall portion 511 and the right outer wall portion 512 are less likely to generate noise due to the vibrations. Similarly, in the case 50 , the outer edge of the front wall portion 504 and the outer edge of the front outer wall portion 513 are partially connected by two front first connecting portions 519 and two front second connecting portions 520 . The outer edge of the rear wall portion 505 and the outer edge of the rear outer wall portion 514 are partially connected by two rear first connecting portions 521 and two rear second connecting portions 522. only Therefore, the vibrations of the front wall portion 504 and the rear wall portion 505 are less likely to propagate to the front wall portion 513 and the rear wall portion 514 , so noise caused by the vibrations is less likely to be generated from the front wall portion 513 and the rear wall portion 514 .

本変更例では、コンデンサ素子１０の第１端面電極１１および第２端面電極１２に対向する左壁部５０７および右壁部５０８の外側に左外壁部５１１および右外壁部５１２が設けられるのみならず、コンデンサ素子１０の周面１３に対向する前壁部５０４および後壁部５０５の外側にも前外壁部５１３および後外壁部５１４が設けられるので、ケース５０は、上記実施の形態のケース３０に比べて、その前後方向のサイズが多少増加するものの、騒音の漏れを一層低減できる。 In this modification, left wall portion 511 and right wall portion 512 are provided outside left wall portion 507 and right wall portion 508 facing first end surface electrode 11 and second end surface electrode 12 of capacitor element 10, respectively. Since front wall portion 513 and rear wall portion 514 are also provided outside front wall portion 504 and rear wall portion 505 facing peripheral surface 13 of capacitor element 10, case 50 is similar to case 30 of the above-described embodiment. Although the size in the front-rear direction is slightly increased, noise leakage can be further reduced.

なお、本変更例において、ケース５０は、底壁部５０６の外側に、この底壁部５０６と隙間を有するようして底外壁部が設けられ、底壁部５０６の外縁部と底外壁部の外縁部とが、部分的に、複数の連結部で連結されるようにしてもよい。即ち、ケース５０の周壁部５０３のほぼ全部の外側に外壁部が設けられてもよい。このようにすれば、ケース５０は、前後方向に加えて上下方向にもサイズが多少増加するものの、騒音の漏れをさらに一層低減できる。 In this modified example, the case 50 is provided with a bottom outer wall portion outside the bottom wall portion 506 so as to have a gap with the bottom wall portion 506, and the outer edge portion of the bottom wall portion 506 and the bottom outer wall portion are provided. The outer edge portion may be partially connected by a plurality of connecting portions. That is, the outer wall portion may be provided on the outer side of substantially the entire peripheral wall portion 503 of the case 50 . In this way, the case 50 is slightly increased in size not only in the longitudinal direction but also in the vertical direction, but noise leakage can be further reduced.

＜その他の変更例＞
たとえば、上記実施の形態のケース３０にいて、左壁部３０７と左外壁部３１１との間および右壁部３０８と右外壁部３１２との間に吸音材を介在させるようにしてもよい。吸音材には、ガラスウール、ロックウール、フェルト等、既知の吸音材料を用いることができる。これにより、ケース３０からの騒音の漏れが一層抑制されることが期待される。同様に、変更例のケース５０において、左壁部５０７と左外壁部５１１との間、右壁部５０８と右外壁部５１２との間、前壁部５０４と前外壁部５１３との間および後壁部５０５と後外壁部５１４との間に吸音材を介在させるようにしてもよい。<Other modification examples>
For example, in case 30 of the above embodiment, a sound absorbing material may be interposed between left wall portion 307 and left outer wall portion 311 and between right wall portion 308 and right outer wall portion 312 . Known sound absorbing materials such as glass wool, rock wool, and felt can be used as the sound absorbing material. This is expected to further suppress leakage of noise from the case 30 . Similarly, in the modified case 50, between the left wall portion 507 and the left outer wall portion 511, between the right wall portion 508 and the right outer wall portion 512, between the front wall portion 504 and the front outer wall portion 513, and between the rear wall portion 504 and the front wall portion 513. A sound absorbing material may be interposed between the wall portion 505 and the rear outer wall portion 514 .

（第２の実施の形態）
本実施の形態において、第１端面電極１１および第２端面電極１２が、請求の範囲に記載の「端面電極」に対応する。また、前壁部３０４および後壁部３０５が、請求の範囲に記載の「第２壁部」に対応する。さらに、左壁部３０７および右壁部３０８が、請求の範囲に記載の「第１壁部」に対応する。さらに、左外壁部３１１および右外壁部３１２が、請求の範囲に記載の「外壁部」に対応する。(Second embodiment)
In the present embodiment, the first edge electrode 11 and the second edge electrode 12 correspond to the "edge electrode" described in the claims. Further, the front wall portion 304 and the rear wall portion 305 correspond to the "second wall portion" described in the claims. Further, the left wall portion 307 and the right wall portion 308 correspond to the "first wall portion" described in the claims. Further, the left outer wall portion 311 and the right outer wall portion 312 correspond to the "outer wall portion" described in the claims.

ただし、上記記載は、あくまで、請求の範囲の構成と実施形態の構成とを対応付けることを目的とするものであって、上記対応付けによって請求の範囲が実施形態の構成に何ら限定されるものではない。 However, the above description is only for the purpose of associating the structure of the claims with the structure of the embodiment, and the above correspondence does not limit the scope of the claims to the structure of the embodiment. Absent.

図９は、本実施の形態に係る、充填樹脂４０が充填される前のフィルムコンデンサ１００の分解斜視図である。図１０は、本実施の形態に係る、中央部で切断されたフィルムコンデンサ１００の正面断面図である。図１１Ａおよび図１１Ｂは、それぞれ、本実施の形態に係る、ケース３１の平面図および底面図である。図１２Ａおよび図１２Ｂは、それぞれ、図１１ＡのＡ－Ａ´断面図およびＢ－Ｂ´断面図である。なお、図１０では、便宜上、充填樹脂４０が透明な状態とされ、その上面部分のみが斜線で描かれている。また、図１２Ｂでは、便宜上、コンデンサ素子１０の外形が一点鎖線により示されている。 FIG. 9 is an exploded perspective view of film capacitor 100 before being filled with filling resin 40 according to the present embodiment. FIG. 10 is a front cross-sectional view of the film capacitor 100 cut at the center according to the present embodiment. 11A and 11B are respectively a plan view and a bottom view of case 31 according to the present embodiment. 12A and 12B are AA' and BB' cross-sectional views of FIG. 11A, respectively. In FIG. 10, for the sake of convenience, the filling resin 40 is in a transparent state, and only its upper surface portion is hatched. In addition, in FIG. 12B, for convenience, the outline of capacitor element 10 is indicated by a dashed line.

フィルムコンデンサ１００は、コンデンサ素子１０と、一対のリード線端子２０と、ケース３１と、充填樹脂４０とを備える。図１０のように、ケース３１内に、一対のリード線端子２０が接続されたコンデンサ素子１０が収容され、充填樹脂４０が充填される。充填樹脂４０は、たとえば、エポキシ樹脂等の熱硬化性樹脂からなり、溶融状態でケース３１内に注入され、ケース３１が加熱されることにより硬化する。充填樹脂４０は、コンデンサ素子１０と一対のリード線端子２０とを覆い、これらの部分を湿気や衝撃から保護する。一対のリード線端子２０の先端部は、充填樹脂４０に覆われず、ケース３１よりも上方に突出し、外部装置に設けられた接続部（図示せず）に接続される。 A film capacitor 100 includes a capacitor element 10 , a pair of lead wire terminals 20 , a case 31 and a filling resin 40 . As shown in FIG. 10, a capacitor element 10 to which a pair of lead wire terminals 20 are connected is housed in a case 31 and filled with a filling resin 40 . The filling resin 40 is made of, for example, a thermosetting resin such as an epoxy resin, is injected into the case 31 in a molten state, and hardens when the case 31 is heated. The filling resin 40 covers the capacitor element 10 and the pair of lead wire terminals 20 to protect these parts from moisture and impact. The tip portions of the pair of lead wire terminals 20 are not covered with the filling resin 40, protrude above the case 31, and are connected to a connection portion (not shown) provided in an external device.

コンデンサ素子１０および一対のリード線端子２０の構成は、第１の実施の形態と同様である。 The configurations of the capacitor element 10 and the pair of lead wire terminals 20 are the same as in the first embodiment.

ケース３１は、耐湿性および耐熱性に優れる樹脂材料、たとえば、ポリフェニレンサルファイド（ＰＰＳ）により形成される。また、ケース３１は、たとえば、ポリブチレンテレフタレート（ＰＢＴ）により形成されてもよい。 Case 31 is made of a resin material having excellent moisture resistance and heat resistance, such as polyphenylene sulfide (PPS). Moreover, the case 31 may be made of, for example, polybutylene terephthalate (PBT).

ケース３１は、コンデンサ素子１０を収容する収容部３０１を有する。ケース３１の上面には、収容部３０１に通じる開口部３０２が形成される。収容部３０１を囲む周壁部３０３は、前壁部３０４と、後壁部３０５と、底壁部３０６と、左壁部３０７と、右壁部３０８とにより構成される。前壁部３０４、後壁部３０５および底壁部３０６は、コンデンサ素子１０の周面１３と対向する。底壁部３０６は、ケース３１において、開口部３０２の反対側に位置する。左壁部３０７はコンデンサ素子１０の第１端面電極１１に対向し、右壁部３０８はコンデンサ素子１０の第２端面電極１２に対向する。 Case 31 has a housing portion 301 that houses capacitor element 10 . The upper surface of the case 31 is formed with an opening 302 communicating with the housing portion 301 . A peripheral wall portion 303 surrounding the housing portion 301 is composed of a front wall portion 304 , a rear wall portion 305 , a bottom wall portion 306 , a left wall portion 307 and a right wall portion 308 . Front wall portion 304 , rear wall portion 305 and bottom wall portion 306 face peripheral surface 13 of capacitor element 10 . The bottom wall portion 306 is located on the opposite side of the opening 302 in the case 31 . Left wall portion 307 faces first end surface electrode 11 of capacitor element 10 , and right wall portion 308 faces second end surface electrode 12 of capacitor element 10 .

前壁部３０４および後壁部３０５は、ほぼ正方形状を有する。底壁部３０６は、やや横長の長方形状であり平坦な平坦部３０６ａと、平坦部３０６ａの前端および後端から、それぞれ、前壁部３０４および後壁部３０５へと繋がる円弧状の湾曲部３０６ｂとを含む。左壁部３０７および右壁部３０８は、前側および後側が湾曲する底壁部３０６の形状に対応するよう、その下部の前後の角部が大きな曲率半径の円弧形状に加工されたやや縦長の長方形状を有する。 Front wall 304 and rear wall 305 have a generally square shape. The bottom wall portion 306 has a slightly oblong rectangular flat portion 306a and an arc-shaped curved portion 306b that extends from the front end and rear end of the flat portion 306a to the front wall portion 304 and the rear wall portion 305, respectively. including. The left wall portion 307 and the right wall portion 308 are slightly vertically elongated rectangles whose lower front and rear corners are processed into an arc shape with a large radius of curvature so as to correspond to the shape of the bottom wall portion 306 whose front and rear sides are curved. have a shape.

底壁部３０６の内面には、左右の端部に前後に並ぶように２つずつ、合計４つの突出部３０９が、上方、即ち開口部３０２側に突出するように形成される。突出部３０９は、先端部が丸められた円柱状を有する。これら４つの突出部３０９により、収容部３０１（ケース３１）内のコンデンサ素子１０が支えられ、コンデンサ素子１０と底壁部３０６との間に隙間が形成される。また、前後２つの突出部３０９の間にコンデンサ素子１０の一部分が嵌り込む状態となるため、コンデンサ素子１０は、前壁部３０４と後壁部３０５との間に隙間を有する状態で、その前後の動きが規制される（図１２Ｂ参照）。 On the inner surface of the bottom wall portion 306 , two protrusions 309 are formed on the left and right ends so as to line up in the front-rear direction, for a total of four protrusions 309 so as to protrude upward, that is, toward the opening 302 . The projecting portion 309 has a cylindrical shape with a rounded tip. These four projecting portions 309 support the capacitor element 10 in the housing portion 301 (case 31 ) and form a gap between the capacitor element 10 and the bottom wall portion 306 . In addition, since a part of capacitor element 10 is fitted between the two front and rear protrusions 309 , capacitor element 10 is in a state of having a gap between front wall portion 304 and rear wall portion 305 . movement is restricted (see FIG. 12B).

左壁部３０７および右壁部３０８の内面には、上下方向に延びるスリット状の３本の溝部３１０が、前後方向に並ぶように形成される。３本の溝部３１０のうち、中央の溝部３１０内に、コンデンサ素子１０に接続されたリード線端子２０が収容される。なお、コンデンサ素子１０の第１端面電極１１および第２端面電極１２に、それぞれ、２つのリード線端子２０が接続される場合がある。このような場合、３本の溝部３１０のうち、前後２つの溝部３１０内に、２つのリード線端子２０が収容されることになる。溝部３１０の上端部は、それより下側の部分よりも溝の幅および深さが大きな大溝部３１０ａとされる。大溝部３１０ａの下端の位置が、ケース３１内への充填樹脂４０の注入量の目安とされ、その位置に到達するまでケース３１内に充填樹脂４０が注入される（図１０参照）。 On the inner surfaces of the left wall portion 307 and the right wall portion 308, three vertically extending slit-shaped grooves 310 are formed so as to be aligned in the front-rear direction. The lead wire terminal 20 connected to the capacitor element 10 is accommodated in the center groove portion 310 of the three groove portions 310 . Two lead wire terminals 20 may be connected to each of the first end face electrode 11 and the second end face electrode 12 of the capacitor element 10 . In such a case, two lead wire terminals 20 are accommodated in the front and rear two grooves 310 of the three grooves 310 . The upper end portion of the groove portion 310 is a large groove portion 310a having a greater groove width and depth than the lower portion. The position of the lower end of the large groove portion 310a is used as a guide for the injection amount of the filling resin 40 into the case 31, and the filling resin 40 is injected into the case 31 until reaching that position (see FIG. 10).

ケース３１には、左壁部３０７および右壁部３０８の外側に、それぞれ、左外壁部３１１および右外壁部３１２が設けられる。左壁部３０７および右壁部３０８と左外壁部３１１および右外壁部３１２との間には、所定の隙間が設けられる。左外壁部３１１および右外壁部３１２の厚さは、左壁部３０７および右壁部３０８の厚さと同じであってもよいし、左壁部３０７および右壁部３０８の厚さより小さくてもよいし大きくてもよい。 The case 31 is provided with a left wall portion 311 and a right wall portion 312 outside the left wall portion 307 and the right wall portion 308, respectively. A predetermined gap is provided between the left wall portion 307 and the right wall portion 308 and the left wall portion 311 and the right wall portion 312 . The thickness of the left wall portion 311 and the right wall portion 312 may be the same as the thickness of the left wall portion 307 and the right wall portion 308, or may be smaller than the thickness of the left wall portion 307 and the right wall portion 308. may be larger.

左外壁部３１１および右外壁部３１２は、前後方向において、外縁部から中央部に向かうに従って、曲線的にケース３１の外側、即ち左壁部３０７および右壁部３０８と離れるように湾曲する形状を有する。このため、左外壁部３１１および右外壁部３１２の左壁部３０７および右壁部３０８に対向する各内壁面３１１ａ、３１２ａが、前後方向において、外縁部から中央部に向かうに従って曲線的にケース３１の外側に突出するように湾曲する面となる。 The left outer wall portion 311 and the right outer wall portion 312 have a curved shape that curves away from the outer side of the case 31, that is, the left wall portion 307 and the right wall portion 308, from the outer edge toward the center in the front-rear direction. have. Therefore, the inner wall surfaces 311a and 312a of the left outer wall portion 311 and the right outer wall portion 312, which face the left wall portion 307 and the right wall portion 308, are curved in the front-rear direction from the outer edge toward the central portion. It becomes a surface that curves so as to protrude to the outside of the

ケース３１は、左壁部３０７の外縁部と左外壁部３１１の外縁部との間に部分的（断続的）に設けられ、左壁部３０７と左外壁部３１１を連結する上側２つの左第１連結部３１３と下側２つの左第２連結部３１４とを含む。同様に、ケース３１は、右壁部３０８の外縁部と右外壁部３１２の外縁部との間に部分的（断続的）に設けられ、右壁部３０８と右外壁部３１２を連結する上側２つの右第１連結部３１５と下側２つの右第２連結部３１６とを含む。 The case 31 is partially (intermittently) provided between the outer edge of the left wall portion 307 and the outer edge of the left outer wall portion 311 , and has two upper left corners connecting the left wall portion 307 and the left outer wall portion 311 . It includes one connecting portion 313 and two left second connecting portions 314 on the lower side. Similarly, the case 31 is partially (intermittently) provided between the outer edge of the right wall portion 308 and the outer edge of the right outer wall portion 312 , and the upper side 2 connecting the right wall portion 308 and the right outer wall portion 312 . including two right first connecting portions 315 and two right second connecting portions 316 on the lower side.

２つの左第１連結部３１３は、左壁部３０７および左外壁部３１１の上端部において、前後方向（左外壁部３１１の壁面に沿う第１の方向）に間隔を有して並ぶ。一方の左第１連結部３１３は、左壁部３０７および左外壁部３１１の前端部に位置し、他方の左第１連結部３１３は、左壁部３０７および左外壁部３１１の後端部に位置する。また、２つの左第２連結部３１４は、２つの左第１連結部３１３と、上下方向（左外壁部３１１の壁面に沿い第１の方向に直交する第２の方向）に離れるように、左壁部３０７および左外壁部３１１の下端部に設けられ、この下端部において、前後方向に間隔を有して並ぶ。２つの左第２連結部３１４は、上下方向において２つの左第１連結部３１３と重ならないよう、前後方向において２つの左第１連結部３１３よりも内側（中央寄り）に位置する。 The two left first connecting portions 313 are arranged with a space therebetween in the front-rear direction (the first direction along the wall surface of the left wall portion 311 ) at the upper ends of the left wall portion 307 and the left wall portion 311 . One left first connecting portion 313 is positioned at the front ends of the left wall portion 307 and the left outer wall portion 311 , and the other left first connecting portion 313 is positioned at the rear end portions of the left wall portion 307 and the left outer wall portion 311 . To position. Also, the two left second connecting portions 314 are separated from the two left first connecting portions 313 in the vertical direction (the second direction perpendicular to the first direction along the wall surface of the left outer wall portion 311). They are provided at the lower end portions of the left wall portion 307 and the left outer wall portion 311, and are arranged at intervals in the front-rear direction at the lower end portions. The two left second connecting portions 314 are positioned inside (closer to the center) than the two left first connecting portions 313 in the front-rear direction so as not to overlap the two left first connecting portions 313 in the vertical direction.

右壁部３０８と右外壁部３１２との間における２つの右第１連結部３１５および２つの右第２連結部３１６の配置も、２つの左第１連結部３１３および２つの左第２連結部３１４の配置と同様である。 The arrangement of the two right first couplings 315 and the two right second couplings 316 between the right wall 308 and the right outer wall 312 is also the two left first couplings 313 and the two left second couplings. 314 arrangement.

フィルムコンデンサ１００では、コンデンサ素子１０への通電時、コンデンサ素子１０が振動することにより、この振動に起因してコンデンサ素子１０から騒音（うなり音）が発生し得る。 In the film capacitor 100, when the capacitor element 10 vibrates when the capacitor element 10 is energized, noise (beat noise) may be generated from the capacitor element 10 due to the vibration.

図１３Ａおよび図１３Ｂは、本実施の形態に係る、コンデンサ素子１０からの騒音を測定した結果について説明するための図である。図１３Ａは、測定条件について説明するための図であり、図１３Ｂは、騒音の測定結果が示された表である。 13A and 13B are diagrams for explaining results of measuring noise from capacitor element 10 according to the present embodiment. FIG. 13A is a diagram for explaining measurement conditions, and FIG. 13B is a table showing noise measurement results.

図１３Ａに示すように、コンデンサ素子１０を、直方体形状の測定ケースに収容し、コンデンサ素子１０の両端面（第１端面電極１１、第２端面電極１２）が向くＸ軸方向とコンデンサ素子１０の周面が向くＹ軸方向において測定ケースから漏れる騒音が測定された。ここで、測定ケースは、幅寸法（Ｘ軸方向の寸法）Ｗ、奥行寸法（Ｙ軸方向の寸法）Ｄおよび高さ寸法Ｈ（Ｚ軸方向の寸法）が、それぞれ、Ｗ＝５７．５ｍｍ、Ｄ＝４４．５ｍｍおよびＨ＝４４．５ｍｍであり、前後、左右および底の全壁部の肉厚ｔが、ｔ＝１ｍｍである。コンデンサ素子１０の端面および周面から測定器までのそれぞれの距離Ｌｘ、Ｌｙは、Ｌｘ＝Ｌｙ＝１０ｍｍである。測定の際には、直流電源およびリップル電源が用いられる。コンデンサ素子１０には、直流電源からＤＣ６５０Ｖの電圧が印加され、リップル電源から９Ａのリップル電流が印加される。 As shown in FIG. 13A, the capacitor element 10 is housed in a rectangular parallelepiped measurement case, and the X-axis direction in which both end surfaces (first end surface electrode 11, second end surface electrode 12) of the capacitor element 10 face and the direction of the capacitor element 10 are measured. The noise leaking from the measurement case was measured in the Y-axis direction in which the peripheral surface faces. Here, the measurement case has a width dimension (X-axis dimension) W, a depth dimension (Y-axis dimension) D and a height dimension H (Z-axis dimension) of W=57.5 mm, D=44.5 mm and H=44.5 mm, and the wall thickness t of all front, rear, left, right and bottom walls is t=1 mm. The respective distances Lx and Ly from the end face and peripheral face of capacitor element 10 to the measuring device are Lx=Ly=10 mm. A DC power supply and a ripple power supply are used in the measurement. A voltage of DC 650 V is applied to the capacitor element 10 from the DC power supply, and a ripple current of 9 A is applied from the ripple power supply.

図１３Ｂに示すように、騒音測定の結果は、Ｘ軸方向の騒音の音圧が７５ｄＢ、Ｙ軸方向の騒音が７０ｄＢであった。 As shown in FIG. 13B, the result of the noise measurement was that the sound pressure of the noise in the X-axis direction was 75 dB, and the noise in the Y-axis direction was 70 dB.

上記の測定結果が示すように、コンデンサ素子１０では、両端面、即ち、第１端面電極１１および第２端面電極１２から発生する騒音が、コンデンサ素子１０の周面１３から発生する騒音よりも大きくなる。 As the above measurement results show, in the capacitor element 10 , the noise generated from both end surfaces, that is, the first end surface electrode 11 and the second end surface electrode 12 is louder than the noise generated from the peripheral surface 13 of the capacitor element 10 . Become.

フィルムコンデンサ１００において、コンデンサ素子１０の第１端面電極１１および第２端面電極１２から発生した、相対的に大きな騒音は、左壁部３０７および右壁部３０８で遮音され、さらに、これらの壁部３０７、３０８から漏れた騒音が、左外壁部３１１および右外壁部３１２で遮音される。一方、コンデンサ素子１０の周面１３から発生した、相対的に小さな騒音は、前壁部３０４、後壁部３０５および底壁部３０６で遮音される。なお、ケース３１の開口部３０２側においては、充填樹脂４０の層が他の部分よりも厚いため、この厚い充填樹脂４０の層による遮音がなされる。 In film capacitor 100, relatively large noise generated from first end surface electrode 11 and second end surface electrode 12 of capacitor element 10 is insulated by left wall portion 307 and right wall portion 308. The noise leaked from 307 and 308 is insulated by the left wall portion 311 and the right wall portion 312 . On the other hand, relatively small noise generated from peripheral surface 13 of capacitor element 10 is insulated by front wall portion 304 , rear wall portion 305 and bottom wall portion 306 . Since the layer of the filling resin 40 is thicker than the other portions on the side of the opening 302 of the case 31, the thick layer of the filling resin 40 provides sound insulation.

ここで、左壁部３０７および右壁部３０８から漏れた音は、左外壁部３１１および右外壁部３１２に衝突し反射する。このとき、左外壁部３１１および右外壁部３１２の各内壁面３１１ａ、３１２ａは、外縁部から中央部に向かうに従ってケース３１の外側に突出するように湾曲する面とされているので、各内壁面３１１ａ、３１２ａで反射した音は、前後方向における中心部側へと方向を変えられて、左壁部３０７および右壁部３０８へ向かう。これにより、反射音は、ケース３１の外方向に拡がりにくくなり、ケース３１の内部に閉じ込められやすくなる。 Here, the sound leaking from the left wall portion 307 and the right wall portion 308 collides with the left wall portion 311 and the right wall portion 312 and is reflected. At this time, the inner wall surfaces 311a and 312a of the left outer wall portion 311 and the right outer wall portion 312 are curved surfaces that protrude outward from the case 31 from the outer edge toward the center. Sounds reflected by 311 a and 312 a are redirected toward the central portion in the front-rear direction and head toward the left wall portion 307 and the right wall portion 308 . As a result, the reflected sound is less likely to spread outward from the case 31 and is more likely to be confined inside the case 31 .

また、コンデンサ素子１０が振動したとき、その振動が周壁部３０３（前壁部３０４、後壁部３０５、底壁部３０６、左壁部３０７および右壁部３０８）にも伝播して周壁部３０３が振動し得る。 Further, when capacitor element 10 vibrates, the vibration propagates to peripheral wall portion 303 (front wall portion 304, rear wall portion 305, bottom wall portion 306, left wall portion 307, and right wall portion 308). can vibrate.

ケース３１では、左壁部３０７の外縁部と左外壁部３１１の外縁部との間が、２つの左第１連結部３１３と２つの左第２連結部３１４とにより部分的に連結されるのみであり、右壁部３０８の外縁部と右外壁部３１２の外縁部との間が、２つの右第１連結部３１５と２つの右第２連結部３１６とにより部分的に連結されるのみである。即ち、左壁部３０７と左外壁部３１１との間および右壁部３０８と右外壁部３１２との間は、全周に亘って壁部に覆われるような状態ではなく、前後および上下のほとんどの部分が開放された状態となる。このため、左壁部３０７が振動したとき、この振動は左第１連結部３１３と左第２連結部３１４とを介して左外壁部３１１に僅かに伝播するのみであり、右壁部３０８が振動したとき、この振動は右第１連結部３１５と右第２連結部３１６とを介して右外壁部３１２に僅かに伝播するのみである。よって、左壁部３０７および右壁部３０８の振動が、左外壁部３１１および右外壁部３１２に伝播しにくいため、振動に起因する騒音が左外壁部３１１および右外壁部３１２から発生しにくい。 In the case 31, the outer edge of the left wall portion 307 and the outer edge of the left outer wall portion 311 are only partially connected by two left first connecting portions 313 and two left second connecting portions 314. , and the outer edge of the right wall portion 308 and the outer edge of the right outer wall portion 312 are only partially connected by two right first connecting portions 315 and two right second connecting portions 316. be. That is, the space between the left wall portion 307 and the left wall portion 311 and between the right wall portion 308 and the right wall portion 312 are not entirely covered by the walls, and most of the front, rear, top and bottom are covered. is opened. Therefore, when the left wall portion 307 vibrates, the vibration only slightly propagates to the left outer wall portion 311 via the left first connecting portion 313 and the left second connecting portion 314, and the right wall portion 308 vibrates. When vibrating, this vibration is only slightly propagated to the right outer wall portion 312 via the right first connecting portion 315 and the right second connecting portion 316 . Therefore, the vibrations of the left wall portion 307 and the right wall portion 308 are less likely to propagate to the left outer wall portion 311 and the right outer wall portion 312 , so that the left outer wall portion 311 and the right outer wall portion 312 are less likely to generate noise due to the vibrations.

＜実施の形態の効果＞
以上、本実施の形態によれば、以下の効果が奏される。<Effect of Embodiment>
As described above, according to the present embodiment, the following effects can be obtained.

ケース３１には、周壁部３０３の一部である左壁部３０７および右壁部３０８の外側に、隙間を有する状態で左外壁部３１１および右外壁部３１２が設けられているので、左壁部３０７および右壁部３０８から漏れた騒音を、左外壁部３１１および右外壁部３１２により遮音することができる。これにより、ケース３１からのコンデンサ素子１０の振動に起因する騒音の漏れを抑制することができる。 Case 31 is provided with left wall portion 311 and right wall portion 312 outside left wall portion 307 and right wall portion 308, which are part of peripheral wall portion 303, with a gap therebetween. The noise leaked from 307 and right wall 308 can be insulated by left wall 311 and right wall 312 . As a result, leakage of noise caused by vibration of capacitor element 10 from case 31 can be suppressed.

また、左外壁部３１１および右外壁部３１２の各内壁面３１１ａ、３１２ａは、外縁部から中央部に向かうに従ってケース３１の外側に突出するように湾曲する面とされており、左外壁部３１１および右外壁部３１２の各内壁面３１１ａ、３１２ａで反射した音は、ケース３１の外方向に拡がりにくくなり、ケース３１の内部に閉じ込められやすくなる。これにより、ケース３１からの騒音の漏れを、一層、抑制することができる。 Further, the inner wall surfaces 311a and 312a of the left outer wall portion 311 and the right outer wall portion 312 are curved surfaces that protrude outward from the case 31 from the outer edge toward the central portion. Sounds reflected by the inner wall surfaces 311 a and 312 a of the right outer wall portion 312 are less likely to spread outward from the case 31 and are more likely to be confined inside the case 31 . Thereby, leakage of noise from the case 31 can be further suppressed.

さらに、左壁部３０７と左外壁部３１１との間は、２つの左第１連結部３１３と２つの左第２連結部３１４とにより部分的に連結されるのみであり、右壁部３０８と右外壁部３１２との間は、２つの右第１連結部３１５と２つの右第２連結部３１６とにより部分的に連結されるのみである。このため、コンデンサ素子１０からの振動が伝播し、左壁部３０７および右壁部３０８が振動しても、この振動が左外壁部３１１および右外壁部３１２に伝播しにくい。よって、振動に起因する騒音が左外壁部３１１および右外壁部３１２から発生しにくくなるので、ケース３１からの騒音の漏れを、一層、抑制することができる。 Further, the left wall portion 307 and the left outer wall portion 311 are only partially connected by two left first connecting portions 313 and two left second connecting portions 314, and the right wall portion 308 and The right outer wall portion 312 is only partially connected by two right first connecting portions 315 and two right second connecting portions 316 . Therefore, even if vibration from capacitor element 10 propagates and left wall portion 307 and right wall portion 308 vibrate, this vibration is less likely to propagate to left wall portion 311 and right wall portion 312 . Therefore, noise caused by vibration is less likely to be generated from the left outer wall portion 311 and the right outer wall portion 312, so that leakage of noise from the case 31 can be further suppressed.

なお、このように、左壁部３０７と左外壁部３１１との間が２つの左第１連結部３１３と２つの左第２連結部３１４とにより部分的に連結され、右壁部３０８と右外壁部３１２との間が２つの右第１連結部３１５と２つの右第２連結部３１６とにより部分的に連結される構成とされた場合、左壁部３０７と左外壁部３１１との間および右壁部３０８と右外壁部３１２との間では、その外周部分が大きく開放されることになる。このため、左外壁部３１１および右外壁部３１２からの反射音が外方に拡がってしまうとケース３１の外に音が漏れやすくなる。本実施の形態では、このような構成において、左外壁部３１１および右外壁部３１２の各内壁面３１１ａ、３１２aが外縁部から中央部に向かうに従ってケース３１の外側に突出するように湾曲する面とされることにより、反射音が外方に拡がりにくい構成とされているので、特に著しいケース３１からの音漏れの抑制効果が期待できる。 In this way, the left wall portion 307 and the left outer wall portion 311 are partially connected by the two left first connecting portions 313 and the two left second connecting portions 314, and the right wall portion 308 and the right wall portion 308 are partially connected to each other. When the outer wall portion 312 is partially connected by the two right first connecting portions 315 and the two right second connecting portions 316, the left wall portion 307 and the left outer wall portion 311 are partially connected. And between the right wall portion 308 and the right outer wall portion 312, the outer peripheral portion is largely opened. Therefore, if the reflected sound from the left outer wall portion 311 and the right outer wall portion 312 spreads outward, the sound tends to leak out of the case 31 . In this embodiment, in such a configuration, the inner wall surfaces 311a and 312a of the left outer wall portion 311 and the right outer wall portion 312 are curved so as to protrude outward from the case 31 from the outer edge toward the center. As a result, the reflected sound is less likely to spread outward, and a particularly remarkable effect of suppressing sound leakage from the case 31 can be expected.

さらに、ケース３１には、相対的に大きな騒音が発生するコンデンサ素子１０の第１端面電極１１および第２端面電極１２に対向する左壁部３０７および右壁部３０８の外側に左外壁部３１１および右外壁部３１２が設けられ、相対的に小さな騒音が発生するコンデンサ素子１０の周面１３に対向する前壁部３０４、後壁部３０５および底壁部３０６の外側には外壁部が設けられない。これにより、二重の壁構造とすることによるケース３１のサイズ増加を極力抑えつつ、ケース３１から漏れる騒音を低減させることができる。 Furthermore, case 31 has left wall portion 311 and left wall portion 311 outside left wall portion 307 and right wall portion 308 facing first end face electrode 11 and second end face electrode 12 of capacitor element 10 that generate relatively large noise. A right outer wall portion 312 is provided, and no outer wall portion is provided outside the front wall portion 304, the rear wall portion 305, and the bottom wall portion 306 facing the peripheral surface 13 of the capacitor element 10 where relatively small noise is generated. . As a result, noise leaking from the case 31 can be reduced while minimizing an increase in the size of the case 31 due to the double wall structure.

さらに、２つの左第２連結部３１４および２つの右第２連結部３１６が、それぞれ、上下方向において２つの左第１連結部３１３および２つの右第１連結部３１５と重ならないように設けられているので、上下方向に分割される金型を用いた樹脂成形により、ケース３１を容易に形成することができる。 Furthermore, two left second connecting portions 314 and two right second connecting portions 316 are provided so as not to overlap the two left first connecting portions 313 and two right first connecting portions 315, respectively, in the vertical direction. Therefore, the case 31 can be easily formed by resin molding using a vertically split mold.

さらに、前後方向において、２つの左第１連結部３１３（２つの右第１連結部３１５）が相対的に外側に位置し、２つの左第２連結部３１４（２つの右第２連結部３１６）が相対的に内側に位置するので、左外壁部３１１（右外壁部３１２）の上側では前後方向における外側の剛性が高まり、左外壁部３１１（右外壁部３１２）の下側では前後方向における内側の剛性が高まり、全体的として左外壁部３１１（右外壁部３１２）の前後方向における内外の剛性が高まる。よって、左外壁部３１１（右外壁部３１２）が振動しにくくなる。 Furthermore, in the front-rear direction, the two left first connecting portions 313 (two right first connecting portions 315) are positioned relatively outside, and the two left second connecting portions 314 (two right second connecting portions 316) are positioned relatively outward. ) are positioned relatively inward, the rigidity of the outer side in the front-rear direction increases on the upper side of the left outer wall section 311 (the right outer wall section 312), and The inner rigidity is increased, and the inner and outer rigidity of the left outer wall portion 311 (right outer wall portion 312) in the front-rear direction is increased as a whole. Therefore, the left outer wall portion 311 (right outer wall portion 312) is less likely to vibrate.

なお、２つの左第１連結部３１３（２つの右第１連結部３１５）および２つの左第２連結部３１４（２つの右第２連結部３１６）が共に前後方向における外側（端寄り）に位置する場合、左外壁部３１１（右外壁部３１２）の前後方向における内側（中央寄り）の部分の剛性が弱くなって内側が振動しやすくなる。反対に、２つの左第１連結部３１３（２つの右第１連結部３１５）および２つの左第２連結部３１４（２つの右第２連結部３１６）が共に前後方向における内側（中央寄り）に位置する場合、左外壁部３１１（右外壁部３１２）の前後方向における外側（端寄り）の部分の剛性が弱くなって外側が振動しやすくなる。 Note that the two left first connecting portions 313 (two right first connecting portions 315) and the two left second connecting portions 314 (two right second connecting portions 316) are both positioned outward (closer to the ends) in the front-rear direction. In this case, the rigidity of the inner side (closer to the center) in the front-rear direction of the left outer wall section 311 (right outer wall section 312) is weakened, and the inner side is likely to vibrate. On the contrary, the two left first connecting portions 313 (the two right first connecting portions 315) and the two left second connecting portions 314 (the two right second connecting portions 316) are both inside (close to the center) in the front-rear direction. , the rigidity of the outer (closer to the end) portion of the left outer wall portion 311 (right outer wall portion 312) in the front-rear direction is weakened, and the outer side tends to vibrate.

さらに、ケース３１内において、コンデンサ素子１０は、４つの突出部３０９により、コンデンサ素子１０と底壁部３０６との間に隙間が形成されるように支えられるので、コンデンサ素子１０の周面１３が直接、底壁部３０６に接触することを防止できる。これにより、コンデンサ素子１０が振動したときに、その振動が底壁部３０６に伝播しにくくなり、底壁部３０６が振動しにくくなる。なお、突出部３０９の形状および個数は、コンデンサ素子１０を、コンデンサ素子１０と底壁部３０６との間に隙間が形成されるように支えられるのであれば、如何なる形状および個数であってもよい。 Furthermore, within case 31, capacitor element 10 is supported by four protruding portions 309 so that a gap is formed between capacitor element 10 and bottom wall portion 306, so that peripheral surface 13 of capacitor element 10 is Direct contact with the bottom wall portion 306 can be prevented. As a result, when capacitor element 10 vibrates, the vibration is less likely to propagate to bottom wall portion 306, and bottom wall portion 306 is less likely to vibrate. The shape and the number of projecting portions 309 may be any shape and number as long as capacitor element 10 is supported so that a gap is formed between capacitor element 10 and bottom wall portion 306. .

以上、本開示の実施の形態について説明したが、本開示は、上記実施の形態に限定されるものではなく、また、本開示の適用例も、上記実施の形態の他に、種々の変更が可能である。 Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and the application examples of the present disclosure may be modified in various ways in addition to the above embodiments. It is possible.

＜第２の実施の形態の変更例＞
図１４は、第２の実施の形態の変更例に係る、ケース５１の斜視図である。図１５Ａおよび図１５Ｂは、それぞれ、変更例に係る、ケース５１の平面図および底面図である。図１６Ａおよび図１６Ｂは、それぞれ、図１５ＡのＡ－Ａ´断面図およびＢ－Ｂ´断面図である。<Modification example of the second embodiment>
FIG. 14 is a perspective view of case 51 according to a modification of the second embodiment. 15A and 15B are respectively a plan view and a bottom view of case 51 according to a modification. 16A and 16B are cross-sectional views along AA' and BB' of FIG. 15A, respectively.

上記実施の形態のケース３１に替えて、本変更例のケース５１が、フィルムコンデンサ１００に備えられてもよい。 Film capacitor 100 may be provided with case 51 of this modification instead of case 31 of the above-described embodiment.

なお、本変更例において、前壁部５０４および後壁部５０５が、請求の範囲に記載の「第２壁部」に対応する。また、左壁部５０７および右壁部５０８が、請求の範囲に記載の「第１壁部」に対応する。さらに、左外壁部５１１、右外壁部５１２、前外壁部５１３および後外壁部５１４が、請求の範囲に記載の「外壁部」に対応する。 In addition, in this modified example, the front wall portion 504 and the rear wall portion 505 correspond to the "second wall portion" described in the claims. Also, the left wall portion 507 and the right wall portion 508 correspond to the "first wall portion" described in the claims. Further, the left outer wall portion 511, the right outer wall portion 512, the front outer wall portion 513, and the rear outer wall portion 514 correspond to the "outer wall portion" described in the claims.

ケース５１は、耐湿性および耐熱性に優れる樹脂材料、たとえば、ポリフェニレンサルファイド（ＰＰＳ）、ポリブチレンテレフタレート（ＰＢＴ）などにより形成される。 Case 51 is made of a resin material having excellent moisture resistance and heat resistance, such as polyphenylene sulfide (PPS) and polybutylene terephthalate (PBT).

ケース５１は、コンデンサ素子１０を収容する収容部５０１を有し、開口部５０２が収容部５０１に通じる。収容部５０１を囲む周壁部５０３は、前壁部５０４と、後壁部５０５と、底壁部５０６と、左壁部５０７と、右壁部５０８とにより構成される。前壁部５０４、後壁部５０５および底壁部５０６は、コンデンサ素子１０の周面１３と対向する。底壁部５０６は、ケース５１において、開口部５０２の反対側に位置する。左壁部５０７はコンデンサ素子１０の第１端面電極１１に対向し、右壁部５０８はコンデンサ素子１０の第２端面電極１２に対向する。 Case 51 has a housing portion 501 that houses capacitor element 10 , and an opening 502 communicates with housing portion 501 . A peripheral wall portion 503 surrounding the housing portion 501 is composed of a front wall portion 504 , a rear wall portion 505 , a bottom wall portion 506 , a left wall portion 507 and a right wall portion 508 . Front wall portion 504 , rear wall portion 505 and bottom wall portion 506 face peripheral surface 13 of capacitor element 10 . The bottom wall portion 506 is located on the opposite side of the opening 502 in the case 51 . Left wall portion 507 faces first end surface electrode 11 of capacitor element 10 , and right wall portion 508 faces second end surface electrode 12 of capacitor element 10 .

前壁部５０４、後壁部５０５および底壁部５０６は、ほぼ正方形状を有する。左壁部３０７および右壁部３０８は、やや縦長の長方形状を有する。 Front wall 504, rear wall 505 and bottom wall 506 have a substantially square shape. The left wall portion 307 and the right wall portion 308 have a slightly elongated rectangular shape.

底壁部５０６の内面には、上記実施の形態のケース３１の底壁部３０６と同様、４つの突出部５０９が設けられる。これら４つの突出部５０９により、収容部５０１（ケース５１）内のコンデンサ素子１０が支えられ、コンデンサ素子１０と底壁部５０６との間に隙間が形成される。また、前後２つの突出部５０９の間にコンデンサ素子１０の一部分が嵌り込む状態となるため、コンデンサ素子１０は、前壁部５０４と後壁部５０５との間に隙間を有する状態で、その前後の動きが規制される（図１６Ｂ参照）。左壁部５０７および右壁部５０８の内面には、上記実施の形態のケース３１の左壁部３０７および右壁部３０８と同様、３本の溝部５１０が設けられ、溝部５１０の上端部が大溝部３１０ａとされる。 The inner surface of the bottom wall portion 506 is provided with four projecting portions 509 like the bottom wall portion 306 of the case 31 of the above embodiment. These four projecting portions 509 support the capacitor element 10 in the housing portion 501 (case 51 ) and form a gap between the capacitor element 10 and the bottom wall portion 506 . Further, since a portion of capacitor element 10 is fitted between the two projecting portions 509 on the front and rear sides, capacitor element 10 has a gap between front wall portion 504 and rear wall portion 505 . movement is restricted (see FIG. 16B). Three groove portions 510 are provided on the inner surfaces of the left wall portion 507 and the right wall portion 508, similarly to the left wall portion 307 and the right wall portion 308 of the case 31 of the above-described embodiment, and the upper ends of the groove portions 510 are large. A groove portion 310a is formed.

ケース５１には、左壁部５０７および右壁部５０８の外側に、それぞれ、左外壁部５１１および右外壁部５１２が設けられ、前壁部５０４および後壁部５０５の外側に、それぞれ、前外壁部５１３および後外壁部５１４が設けられる。左壁部５０７および右壁部５０８と左外壁部５１１および右外壁部５１２との間、並びに前壁部５０４および後壁部５０５と前外壁部５１３および後外壁部５１４との間には、所定の隙間が設けられる。左外壁部５１１、右外壁部５１２、前外壁部５１３および後外壁部５１４は、左壁部５０７、右壁部５０８、前壁部５０４および後壁部５０５と同様な形状および大きさを有する。左外壁部５１１、右外壁部５１２、前外壁部５１３および後外壁部５１４の厚さは、左壁部５０７、右壁部５０８、前壁部５０４および後壁部５０５の厚さと同じであってもよいし、左壁部５０７、右壁部５０８、前壁部５０４および後壁部５０５の厚さより小さくてもよいし大きくてもよい。 The case 51 is provided with a left outer wall portion 511 and a right outer wall portion 512 on the outer sides of the left wall portion 507 and the right wall portion 508, respectively, and a front outer wall portion on the outer sides of the front wall portion 504 and the rear wall portion 505, respectively. A portion 513 and a rear wall portion 514 are provided. Between the left wall portion 507 and the right wall portion 508 and the left wall portion 511 and the right wall portion 512, and between the front wall portion 504 and the rear wall portion 505 and the front wall portion 513 and the rear wall portion 514, predetermined A gap is provided. Left wall portion 511 , right wall portion 512 , front wall portion 513 and rear wall portion 514 have the same shape and size as left wall portion 507 , right wall portion 508 , front wall portion 504 and rear wall portion 505 . The left wall portion 511, the right wall portion 512, the front wall portion 513 and the rear wall portion 514 have the same thickness as the left wall portion 507, the right wall portion 508, the front wall portion 504 and the rear wall portion 505. , or may be smaller or larger than the thickness of the left wall portion 507 , right wall portion 508 , front wall portion 504 and rear wall portion 505 .

左外壁部５１１および右外壁部５１２は、前後方向において、外縁部から中央部に向かうに従って、曲線的にケース５１の外側、即ち左壁部５０７および右壁部５０８と離れるように湾曲する形状を有する。このため、左外壁部５１１および右外壁部５１２の左壁部５０７および右壁部５０８に対向する各内壁面５１１ａ、５１２ａが、前後方向において、外縁部から中央部に向かうに従って曲線的にケース５１の外側に突出するように湾曲する面となる。同様に、前外壁部５１３および後外壁部５１４は、左右方向において、外縁部から中央部に向かうに従って、曲線的にケース５１の外側、即ち前壁部５０４および後壁部５０５と離れるように湾曲する形状を有する。このため、前外壁部５１３および後外壁部５１４の前壁部５０４および後壁部５０５に対向する各内壁面５１３ａ、５１４ａが、左右方向において、外縁部から中央部に向かうに従って曲線的にケース５１の外側に突出するように湾曲する面となる。 The left outer wall portion 511 and the right outer wall portion 512 have a curved shape that curves away from the outer side of the case 51, that is, the left wall portion 507 and the right wall portion 508, from the outer edge toward the center in the front-rear direction. have. For this reason, the inner wall surfaces 511a and 512a of the left outer wall portion 511 and the right outer wall portion 512, which face the left wall portion 507 and the right wall portion 508, are curved in the front-rear direction from the outer edge toward the center. It becomes a surface that curves so as to protrude to the outside of the Similarly, the front wall portion 513 and the rear wall portion 514 are curved away from the outside of the case 51, that is, the front wall portion 504 and the rear wall portion 505, in the left-right direction from the outer edge toward the center. It has a shape that For this reason, the inner wall surfaces 513a and 514a of the front wall portion 513 and the rear wall portion 514, which face the front wall portion 504 and the rear wall portion 505, are curved in the lateral direction from the outer edge toward the center. It becomes a surface that curves so as to protrude to the outside of the

ケース５１は、左壁部５０７の外縁部と左外壁部５１１の外縁部との間に部分的（断続的）に設けられ、左壁部５０７と左外壁部５１１を連結する上側２つの左第１連結部５１５と下側２つの左第２連結部５１６とを含む。また、ケース５１は、右壁部５０８の外縁部と右外壁部５１２の外縁部との間に部分的（断続的）に設けられ、右壁部５０８と右外壁部５１２を連結する上側２つの右第１連結部５１７と下側２つの右第２連結部５１８とを含む。さらに、ケース５１は、前壁部５０４の外縁部と前外壁部５１３の外縁部との間に部分的（断続的）に設けられ、前壁部５０４と前外壁部５１３を連結する上側２つの前第１連結部５１９と下側２つの前第２連結部５２０とを含む。さらに、ケース５１は、後壁部５０５の外縁部と後外壁部５１４の外縁部との間に部分的（断続的）に設けられ、後壁部５０５と後外壁部５１４を連結する上側２つの後第１連結部５２１と下側２つの後第２連結部５２２とを含む。 The case 51 is partially (intermittently) provided between the outer edge of the left wall portion 507 and the outer edge of the left outer wall portion 511 , and has two upper left corners connecting the left wall portion 507 and the left outer wall portion 511 . It includes one connecting portion 515 and two left second connecting portions 516 on the lower side. In addition, the case 51 is partially (intermittently) provided between the outer edge of the right wall portion 508 and the outer edge of the right outer wall portion 512, and connects the right wall portion 508 and the right outer wall portion 512 to each other. It includes a right first connecting portion 517 and two right second connecting portions 518 on the lower side. Furthermore, the case 51 is partially (intermittently) provided between the outer edge of the front wall portion 504 and the outer edge of the front outer wall portion 513, and connects the front wall portion 504 and the front outer wall portion 513 to the upper two parts. It includes a front first connecting portion 519 and two front second connecting portions 520 on the lower side. Furthermore, the case 51 is partially (intermittently) provided between the outer edge of the rear wall portion 505 and the outer edge of the rear outer wall portion 514, and connects the rear wall portion 505 and the rear outer wall portion 514 to two upper side portions. It includes a rear first connecting portion 521 and two rear second connecting portions 522 on the lower side.

２つの左第１連結部５１５は、左壁部５０７および左外壁部５１１の上端部において、前後方向（左外壁部５１１の壁面に沿う第１の方向）に間隔を有して並ぶ。一方の左第１連結部５１５は、左壁部５０７および左外壁部５１１の前端部に位置し、他方の左第１連結部５１５は、左壁部５０７および左外壁部５１１の後端部に位置する。また、２つの左第２連結部５１６は、２つの左第１連結部５１５と、上下方向（左外壁部５１１の壁面に沿い第１の方向に直交する第２の方向）に離れるように、左壁部５０７および左外壁部５１１の下端部に設けられ、この下端部において、前後方向に間隔を有して並ぶ。２つの左第２連結部５１６は、上下方向において２つの左第１連結部５１５と重ならないよう、前後方向において２つの左第１連結部５１５よりも内側（中央寄り）に位置する。 The two left first connecting portions 515 are arranged at intervals in the front-rear direction (the first direction along the wall surface of the left outer wall portion 511) at the upper end portions of the left wall portion 507 and the left outer wall portion 511 . One left first connecting portion 515 is positioned at the front ends of the left wall portion 507 and the left outer wall portion 511 , and the other left first connecting portion 515 is positioned at the rear end portions of the left wall portion 507 and the left outer wall portion 511 . To position. In addition, the two left second connecting portions 516 are separated from the two left first connecting portions 515 in the vertical direction (the second direction perpendicular to the first direction along the wall surface of the left outer wall portion 511). They are provided at the lower ends of the left wall portion 507 and the left outer wall portion 511, and are arranged at intervals in the front-rear direction at the lower ends. The two left second connecting portions 516 are positioned inside (closer to the center) than the two left first connecting portions 515 in the front-rear direction so as not to overlap the two left first connecting portions 515 in the vertical direction.

右壁部５０８と右外壁部５１２との間における２つの右第１連結部５１７および２つの右第２連結部５１８の配置も、２つの左第１連結部５１５および２つの左第２連結部５１６の配置と同様である。 The arrangement of two right first couplings 517 and two right second couplings 518 between the right wall portion 508 and the right outer wall portion 512 is also two left first couplings 515 and two left second couplings. 516 arrangement.

２つの前第１連結部５１９は、前壁部５０４および前外壁部５１３の上端部において、左右方向（前外壁部５１３の壁面に沿う第１の方向）に間隔を有して並ぶ。一方の前第１連結部５１９は、前壁部５０４および前外壁部５１３の左端部に位置し、他方の前第１連結部５１９は、前壁部５０４および前外壁部５１３の右端部に位置する。また、２つの前第２連結部５２０は、２つの前第１連結部５１９と、上下方向（前外壁部５１３の壁面に沿い第１の方向に直交する第２の方向）に離れるように、前壁部５０４および前外壁部５１３の下端部に設けられ、この下端部において、左右方向に間隔を有して並ぶ。２つの前第２連結部５２０は、上下方向において２つの前第１連結部５１９と重ならないよう、左右方向において２つの前第１連結部５１９よりも内側（中央寄り）に位置する。 The two front first connecting portions 519 are spaced apart in the left-right direction (first direction along the wall surface of the front wall portion 513 ) at the upper end portions of the front wall portion 504 and the front wall portion 513 . One front first connecting portion 519 is positioned at the left end of the front wall portion 504 and the front outer wall portion 513, and the other front first connecting portion 519 is positioned at the right end of the front wall portion 504 and the front outer wall portion 513. do. Also, the two front second connecting portions 520 are separated from the two front first connecting portions 519 in the vertical direction (the second direction orthogonal to the first direction along the wall surface of the front outer wall portion 513). They are provided at the lower end portions of the front wall portion 504 and the front outer wall portion 513, and are arranged at intervals in the left-right direction at the lower end portions. The two front second connecting portions 520 are positioned inside (closer to the center) than the two front first connecting portions 519 in the left-right direction so as not to overlap the two front first connecting portions 519 in the vertical direction.

後壁部５０５と後外壁部５１４との間における２つの後第１連結部５２１および２つの後第２連結部５２２の配置も、２つの前第１連結部５１９および２つの前第２連結部５２０の配置と同様である。 The arrangement of the two rear first connecting portions 521 and the two rear second connecting portions 522 between the rear wall portion 505 and the rear wall portion 514 is also two front first connecting portions 519 and two front second connecting portions. 520 arrangement.

ケース５１が備えられたフィルムコンデンサ１００において、コンデンサ素子１０の第１端面電極１１および第２端面電極１２から発生した、相対的に大きな騒音は、左壁部５０７および右壁部５０８で遮音され、さらに、これらの壁部５０７、５０８から漏れた騒音が、左外壁部５１１および右外壁部５１２で遮音される。一方、コンデンサ素子１０の周面１３から発生した、相対的に小さな騒音は、前壁部５０４、後壁部５０５および底壁部５０６で遮音される。さらに、前壁部５０４および後壁部５０５から漏れた騒音が、前外壁部５１３および後外壁部５１４で遮音される。なお、ケース５１の開口部５０２側においては、充填樹脂４０の層が他の部分よりも厚いため、この厚い充填樹脂４０の層による遮音がなされる。 In the film capacitor 100 provided with the case 51, relatively large noise generated from the first end surface electrode 11 and the second end surface electrode 12 of the capacitor element 10 is insulated by the left wall portion 507 and the right wall portion 508, Furthermore, the noise leaked from these walls 507 and 508 is insulated by the left wall 511 and the right wall 512 . On the other hand, relatively small noise generated from peripheral surface 13 of capacitor element 10 is insulated by front wall portion 504 , rear wall portion 505 and bottom wall portion 506 . Further, noise leaked from the front wall portion 504 and the rear wall portion 505 is insulated by the front wall portion 513 and the rear wall portion 514 . Since the layer of the filling resin 40 is thicker than the other portions on the side of the opening 502 of the case 51, the thick layer of the filling resin 40 provides sound insulation.

ここで、左壁部５０７および右壁部５０８から漏れた音は、左外壁部５１１および右外壁部５１２に衝突し反射する。このとき、左外壁部５１１および右外壁部５１２の各内壁面５１１ａ、５１２ａは、外縁部から中央部に向かうに従ってケース５１の外側に突出するように湾曲する面とされているので、各内壁面５１１ａ、５１２ａで反射した音は、前後方向における中心部側へと方向を変えられて、左壁部５０７および右壁部５０８へ向かう。これにより、反射音は、ケース５１の外方向に拡がりにくくなり、ケース５１の内部に閉じ込められやすくなる。同様に、前外壁部５１３および後外壁部５１４の各内壁面５１３ａ、５１４ａも、外縁部から中央部に向かうに従ってケース５１の外側に突出するように湾曲する面とされているので、これら各内壁面５１３ａ、５１４ａで反射した音も、ケース５１の内部に閉じ込められやすくなる。 Here, the sound leaked from the left wall portion 507 and the right wall portion 508 collides with the left wall portion 511 and the right wall portion 512 and is reflected. At this time, the inner wall surfaces 511a and 512a of the left outer wall portion 511 and the right outer wall portion 512 are curved surfaces that protrude outward from the case 51 from the outer edge toward the center. The sound reflected by 511 a and 512 a is redirected toward the central portion in the front-rear direction, and goes toward the left wall portion 507 and the right wall portion 508 . As a result, the reflected sound is less likely to spread outward from the case 51 and is more likely to be confined inside the case 51 . Similarly, the inner wall surfaces 513a and 514a of the front outer wall portion 513 and the rear outer wall portion 514 are curved so as to protrude outward from the case 51 from the outer edge toward the center. The sound reflected by the wall surfaces 513 a and 514 a also tends to be confined inside the case 51 .

また、コンデンサ素子１０が振動したとき、その振動が周壁部５０３（前壁部５０４、後壁部５０５、底壁部５０６、左壁部５０７および右壁部５０８）にも伝播して周壁部５０３が振動し得る。 Further, when capacitor element 10 vibrates, the vibration propagates to peripheral wall portion 503 (front wall portion 504, rear wall portion 505, bottom wall portion 506, left wall portion 507, and right wall portion 508). can vibrate.

ケース５１では、左壁部５０７の外縁部と左外壁部５１１の外縁部との間が、２つの左第１連結部５１５と２つの左第２連結部５１６とにより部分的に連結されるのみであり、右壁部５０８の外縁部と右外壁部５１２の外縁部との間が、２つの右第１連結部５１７と２つの右第２連結部５１８とにより部分的に連結されるのみである。よって、左壁部５０７および右壁部５０８の振動が、左外壁部５１１および右外壁部５１２に伝播しにくいため、振動に起因する騒音が左外壁部５１１および右外壁部５１２から発生しにくい。同様に、ケース５１では、前壁部５０４の外縁部と前外壁部５１３の外縁部との間が、２つの前第１連結部５１９と２つの前第２連結部５２０とにより部分的に連結されるのみであり、後壁部５０５の外縁部と後外壁部５１４の外縁部との間が、２つの後第１連結部５２１と２つの後第２連結部５２２とにより部分的に連結されるのみである。よって、前壁部５０４および後壁部５０５の振動が、前外壁部５１３および後外壁部５１４に伝播しにくいため、振動に起因する騒音が前外壁部５１３および後外壁部５１４から発生しにくい。 In the case 51, the outer edge of the left wall portion 507 and the outer edge of the left outer wall portion 511 are only partially connected by two left first connecting portions 515 and two left second connecting portions 516. , and the outer edge of the right wall portion 508 and the outer edge of the right outer wall portion 512 are only partially connected by two right first connecting portions 517 and two right second connecting portions 518. be. Therefore, the vibrations of the left wall portion 507 and the right wall portion 508 are less likely to propagate to the left outer wall portion 511 and the right outer wall portion 512 , so that the left outer wall portion 511 and the right outer wall portion 512 are less likely to generate noise due to the vibrations. Similarly, in the case 51 , the outer edge of the front wall portion 504 and the outer edge of the front outer wall portion 513 are partially connected by two front first connecting portions 519 and two front second connecting portions 520 . The outer edge of the rear wall portion 505 and the outer edge of the rear outer wall portion 514 are partially connected by two rear first connecting portions 521 and two rear second connecting portions 522. only Therefore, the vibrations of the front wall portion 504 and the rear wall portion 505 are less likely to propagate to the front wall portion 513 and the rear wall portion 514 , so noise caused by the vibrations is less likely to be generated from the front wall portion 513 and the rear wall portion 514 .

本変更例では、コンデンサ素子１０の第１端面電極１１および第２端面電極１２に対向する左壁部５０７および右壁部５０８の外側に左外壁部５１１および右外壁部５１２が設けられるのみならず、コンデンサ素子１０の周面１３に対向する前壁部５０４および後壁部５０５の外側にも前外壁部５１３および後外壁部５１４が設けられるので、ケース５１は、上記実施の形態のケース３１に比べて、その前後方向のサイズが多少増加するものの、騒音の漏れを一層低減できる。 In this modification, left wall portion 511 and right wall portion 512 are provided outside left wall portion 507 and right wall portion 508 facing first end surface electrode 11 and second end surface electrode 12 of capacitor element 10, respectively. Since front wall portion 513 and rear wall portion 514 are also provided outside front wall portion 504 and rear wall portion 505 facing peripheral surface 13 of capacitor element 10, case 51 is similar to case 31 of the above-described embodiment. Although the size in the front-rear direction is slightly increased, noise leakage can be further reduced.

なお、本変更例において、ケース５１は、底壁部５０６の外側に、この底壁部５０６と隙間を有するようして底外壁部が設けられ、底壁部５０６の外縁部と底外壁部の外縁部とが、部分的に、複数の連結部で連結されるようにしてもよい。即ち、ケース５１の周壁部５０３のほぼ全部の外側に外壁部が設けられてもよい。このようにすれば、ケース５１は、前後方向に加えて上下方向にもサイズが多少増加するものの、騒音の漏れをさらに一層低減できる。この場合、底外壁部は、左外壁部５１１等と同様な湾曲形状とされることが望ましい。 In this modified example, the case 51 is provided with a bottom outer wall portion outside the bottom wall portion 506 so as to have a gap with the bottom wall portion 506, and the outer edge portion of the bottom wall portion 506 and the bottom outer wall portion are provided. The outer edge portion may be partially connected by a plurality of connecting portions. That is, the outer wall portion may be provided on the outside of substantially the entire peripheral wall portion 503 of the case 51 . In this way, although the size of the case 51 is slightly increased not only in the longitudinal direction but also in the vertical direction, noise leakage can be further reduced. In this case, it is desirable that the bottom outer wall portion has a curved shape similar to the left outer wall portion 511 and the like.

＜その他の変更例＞
たとえば、上記実施の形態のケース３１にいて、左壁部３０７と左外壁部３１１との間および右壁部３０８と右外壁部３１２との間に吸音材を介在させるようにしてもよい。吸音材には、ガラスウール、ロックウール、フェルト等、既知の吸音材料を用いることができる。これにより、ケース３１からの騒音の漏れが一層抑制されることが期待される。同様に、変更例のケース５１において、左壁部５０７と左外壁部５１１との間、右壁部５０８と右外壁部５１２との間、前壁部５０４と前外壁部５１３との間および後壁部５０５と後外壁部５１４との間に吸音材を介在させるようにしてもよい。<Other modification examples>
For example, in case 31 of the above embodiment, a sound absorbing material may be interposed between left wall portion 307 and left outer wall portion 311 and between right wall portion 308 and right outer wall portion 312 . Known sound absorbing materials such as glass wool, rock wool, and felt can be used as the sound absorbing material. This is expected to further suppress leakage of noise from the case 31 . Similarly, in the case 51 of the modified example, between the left wall portion 507 and the left outer wall portion 511, between the right wall portion 508 and the right outer wall portion 512, between the front wall portion 504 and the front outer wall portion 513, and between the rear wall portion 504 and the front wall portion 513 A sound absorbing material may be interposed between the wall portion 505 and the rear outer wall portion 514 .

また、上記実施の形態では、左外壁部３１１および右外壁部３１２が、前後方向において、外縁部から中央部に向かうに従ってケース３１の外側に突出するように湾曲する形状に形成された。しかしながら、図１７Ａに示すように、左外壁部３１１および右外壁部３１２が、上下方向において、外縁部から中央部に向かうに従ってケース３１の外側に突出するように湾曲する形状に形成されてもよい。さらには、左外壁部３１１および右外壁部３１２が、前後方向および上下方向の双方において、外縁部から中央部に向かうに従ってケース３１の外側に突出するように湾曲する形状（３次元湾曲形状）に形成されてもよい。ケース５１の左外壁部５１１、右外壁部５１２、前外壁部５１３および後外壁部５１４においても、同様な変更が行える。 Further, in the above-described embodiment, the left outer wall portion 311 and the right outer wall portion 312 are formed in a curved shape that protrudes outward from the case 31 in the front-rear direction from the outer edge toward the center. However, as shown in FIG. 17A, the left outer wall portion 311 and the right outer wall portion 312 may be formed in a curved shape in the vertical direction so as to protrude outward from the case 31 from the outer edge toward the center. . Further, the left outer wall portion 311 and the right outer wall portion 312 are curved in both the front-rear direction and the vertical direction so as to project outward from the case 31 as they move from the outer edge toward the center (three-dimensional curved shape). may be formed. Similar modifications can be made to the left wall portion 511 , the right wall portion 512 , the front wall portion 513 and the rear wall portion 514 of the case 51 .

さらに、上記実施の形態では、左外壁部３１１および右外壁部３１２の壁部全体が、外縁部から中央部に向かうに従ってケース３１の外側に突出するように湾曲する形状とされることで、各内壁面３１１ａ、３１２ａが湾曲面に形成された。しかしながら、反射音をケース３１の外方向に拡げないためには、各内壁面３１１ａ、３１２ａが、外縁部から中央部に向かうに従って左壁部３０７あるいは右壁部３０８と離れる形状であればよい。よって、図１７Ｂに示すように、左外壁部３１１および右外壁部３１２は、各内壁面３１１ａ、３１２ａが湾曲面となり、各外壁面３１１ｂ、３１２ｂが平坦面となるように形成されてもよい。ケース５１の左外壁部５１１、右外壁部５１２、前外壁部５１３および後外壁部５１４においても、同様な変更が行える。 Furthermore, in the above-described embodiment, the entire wall portions of the left outer wall portion 311 and the right outer wall portion 312 are curved so as to protrude outward from the case 31 from the outer edge toward the center. The inner wall surfaces 311a, 312a are formed into curved surfaces. However, in order not to spread the reflected sound outward from the case 31, the inner wall surfaces 311a and 312a may have a shape that separates from the left wall portion 307 or the right wall portion 308 from the outer edge toward the center. Therefore, as shown in FIG. 17B, the left outer wall portion 311 and the right outer wall portion 312 may be formed such that the inner wall surfaces 311a and 312a are curved surfaces and the outer wall surfaces 311b and 312b are flat surfaces. Similar modifications can be made to the left wall portion 511 , the right wall portion 512 , the front wall portion 513 and the rear wall portion 514 of the case 51 .

さらに、上記実施の形態では、左外壁部３１１および右外壁部３１２、即ち、各内壁面３１１ａ、３１２ａが、曲線的に、ケース３１の外側に突出するような湾曲形状に形成された。しかしながら、図１８Ａ、図１８Ｂに示すように、左外壁部３１１および右外壁部３１２、即ち、各内壁面３１１ａ、３１２ａが、直線的に、ケース３１の外側に突出するように屈曲する形状であってもよい。なお、図１８Ｂのように、各内壁面３１１ａ、３１２ａには、小さな範囲であれば、中央部に平坦な面が存在していてもよい。この点は、各内壁面３１１ａ、３１２ａが、曲線的に、ケース３１の外側に突出する場合も同様である。ケース５１の左外壁部５１１、右外壁部５１２、前外壁部５１３および後外壁部５１４においても、同様な変更が行える。 Furthermore, in the above-described embodiment, the left outer wall portion 311 and the right outer wall portion 312, that is, the respective inner wall surfaces 311a and 312a, are formed in a curved shape that protrudes outward from the case 31 in a curvilinear manner. However, as shown in FIGS. 18A and 18B, the left outer wall portion 311 and the right outer wall portion 312, that is, the respective inner wall surfaces 311a and 312a, have a shape that is bent linearly so as to protrude to the outside of the case 31. may In addition, as shown in FIG. 18B, each of the inner wall surfaces 311a and 312a may have a flat surface in the central portion as long as the area is small. This point is the same when each of the inner wall surfaces 311a and 312a protrudes to the outside of the case 31 in a curved line. Similar modifications can be made to the left wall portion 511 , the right wall portion 512 , the front wall portion 513 and the rear wall portion 514 of the case 51 .

さらに、図１７Ａの構成に、図１７Ｂ、図１８Ａおよび図１８Ｂの構成が適用されてもよい。 Furthermore, the configurations of FIGS. 17B, 18A and 18B may be applied to the configuration of FIG. 17A.

上記第１および第２の実施の形態では、ケース３０（３１）は、左壁部３０７と左外壁部３１１との間が２つの左第１連結部３１３と２つの左第２連結部３１４とにより連結され、右壁部３０８と右外壁部３１２との間が２つの右第１連結部３１５と２つの右第２連結部３１６とにより連結された。しかしながら、左壁部３０７と左外壁部３１１との間の外周部分が壁部で覆われて閉塞されるような構成とされてもよい。ケース５０（５１）においても、同様な変更を行うことができる。 In the first and second embodiments, the case 30 (31) has two left first connecting portions 313 and two left second connecting portions 314 between the left wall portion 307 and the left outer wall portion 311. The right wall portion 308 and the right outer wall portion 312 are connected by two right first connecting portions 315 and two right second connecting portions 316 . However, the outer peripheral portion between the left wall portion 307 and the left outer wall portion 311 may be covered with a wall portion to be closed. Similar changes can be made in case 50 (51).

さらに、上記第１および第２の実施の形態では、左第１連結部３１３、左第２連結部３１４、右第１連結部３１５および右第２連結部３１６が、ケース３０（３１）に２つずつ設けられた。しかしながら、左第１連結部３１３、左第２連結部３１４、右第１連結部３１５および右第２連結部３１６の個数は、これらに限定されるものでなく、如何なる個数であってもよい。さらに、左第１連結部３１３および左第２連結部３１４（右第１連結部３１５および右第２連結部３１６）が設けられる位置も、上記実施の形態に限定されず、左壁部３０７（右壁部３０８）と左外壁部３１１（右外壁部３１２）との間に部分的に設けられれば、如何なる位置であってもよい。同様に、ケース５０（５１）に設けられる左第１連結部５１５、左第２連結部５１６、右第１連結部５１７、右第２連結部５１８、前第１連結部５１９、前第２連結部５２０、後第１連結部５２１および後第２連結部５２２の個数や位置も、如何なる個数や位置であってもよい。 Furthermore, in the above-described first and second embodiments, the left first connecting portion 313, the left second connecting portion 314, the right first connecting portion 315 and the right second connecting portion 316 are attached to the case 30 (31). were established one by one. However, the numbers of the left first connecting portion 313, the left second connecting portion 314, the right first connecting portion 315, and the right second connecting portion 316 are not limited to these, and may be any number. Further, the positions at which the left first connecting portion 313 and the left second connecting portion 314 (the right first connecting portion 315 and the right second connecting portion 316) are provided are not limited to those in the above embodiment, and the left wall portion 307 ( As long as it is partially provided between the right wall portion 308) and the left outer wall portion 311 (the right outer wall portion 312), it may be in any position. Similarly, a left first connecting portion 515, a left second connecting portion 516, a right first connecting portion 517, a right second connecting portion 518, a front first connecting portion 519, and a front second connecting portion provided on the case 50 (51) The number and positions of the portion 520, the rear first connecting portion 521, and the rear second connecting portion 522 may be any number and positions.

さらに、上記第１および第２の実施の形態では、フィルムコンデンサ１（１００）が、ケース３０（３１）内に１個のコンデンサ素子１０が収容される構成とされた。しかしながら、これに限らず、フィルムコンデンサ１（１００）が、ケース３０（３１）内に複数個のコンデンサ素子１０が収容される構成とされてもよい。 Furthermore, in the first and second embodiments, the film capacitor 1 (100) is configured such that one capacitor element 10 is accommodated in the case 30 (31). However, the configuration is not limited to this, and the film capacitor 1 (100) may be configured such that a plurality of capacitor elements 10 are accommodated in the case 30 (31).

さらに、上記第１および第２の実施の形態では、コンデンサ素子１０は、誘電体フィルム上にアルミニウムを蒸着させた２枚の金属化フィルムを重ね、重ねた金属化フィルムを巻回などすることで形成されたものであるが、これ以外にも、誘電体フィルムの両面にアルミニウムを蒸着させた金属化フィルムと絶縁フィルムとを重ね、これを巻回などすることによりコンデンサ素子１０が形成されてもよい。 Furthermore, in the above-described first and second embodiments, the capacitor element 10 is formed by stacking two metallized films in which aluminum is vapor-deposited on a dielectric film, and winding the stacked metallized films. Alternatively, the capacitor element 10 may be formed by stacking a metallized film in which aluminum is vapor-deposited on both sides of a dielectric film and an insulating film, and winding them. good.

さらに、上記第１および第２の実施の形態では、コンデンサ素子１０が収容されたケース３０（３１）内に充填樹脂４０が充填された。しかしながら、ケース３０（３１）内に充填樹脂４０が充填されず、ケース３０（３１）の開口部３０２が蓋部で覆われ、ケース３０（３１）の内部が密閉されるような構成とされてもよい。 Further, in the first and second embodiments, the filling resin 40 is filled in the case 30 (31) in which the capacitor element 10 is housed. However, the filling resin 40 is not filled in the case 30 (31), the opening 302 of the case 30 (31) is covered with the lid, and the inside of the case 30 (31) is sealed. good too.

さらに、上記第１および第２の実施の形態では、本開示のコンデンサの一例として、フィルムコンデンサ１（１００）が挙げられた。しかしながら、本開示は、コンデンサ素子がケース内に収容される構成のコンデンサであれば、フィルムコンデンサ１（１００）以外のコンデンサに適用することもできる。 Furthermore, in the above-described first and second embodiments, the film capacitor 1 (100) was mentioned as an example of the capacitor of the present disclosure. However, the present disclosure can also be applied to a capacitor other than the film capacitor 1 (100) as long as the capacitor has a configuration in which a capacitor element is housed in a case.

この他、本開示の実施の形態は、請求の範囲に示された技術的思想の範囲内において、適宜、種々の変更が可能である。 In addition, the embodiments of the present disclosure can be appropriately modified in various ways within the scope of the technical ideas indicated in the claims.

なお、上記実施の形態の説明において「上方」「下方」等の方向を示す用語は、構成部材の相対的な位置関係にのみ依存する相対的な方向を示すものであり、鉛直方向、水平方向等の絶対的な方向を示すものではない。 In the description of the above embodiments, terms such as "upper" and "lower" indicate relative directions that depend only on the relative positional relationship of constituent members, and are vertical and horizontal. It does not indicate an absolute direction such as

本開示は、各種電子機器、電気機器、産業機器、車両の電装等に使用されるコンデンサに有用である。 INDUSTRIAL APPLICABILITY The present disclosure is useful for capacitors used in various electronic devices, electrical devices, industrial devices, vehicle electrical equipment, and the like.

１ フィルムコンデンサ（コンデンサ）
１０ コンデンサ素子
１１ 第１端面電極（端面電極）
１２ 第２端面電極（端面電極）
３０ ケース
３１ ケース
１００ フィルムコンデンサ（コンデンサ）
３０２ 開口部
３０３ 周壁部
３０４ 前壁部（第２壁部）
３０５ 後壁部（第２壁部）
３０６ 底壁部
３０７ 左壁部（第１壁部）
３０８ 右壁部（第１壁部）
３０９ 突出部
３１１ 左外壁部（外壁部）
３１１ａ 内壁面
３１２ 右外壁部（外壁部）
３１２ａ 内壁面
３１３ 左第１連結部（壁連結部、第１連結部）
３１４ 左第２連結部（壁連結部、第２連結部）
３１５ 右第１連結部（壁連結部、第１連結部）
３１６ 右第２連結部（壁連結部、第２連結部）
５０ ケース
５１ ケース
５０２ 開口部
５０３ 周壁部
５０４ 前壁部（第２壁部）
５０５ 後壁部（第２壁部）
５０６ 底壁部
５０７ 左壁部（第１壁部）
５０８ 右壁部（第１壁部）
５０９ 突出部
５１１ 左外壁部（外壁部）
５１１ａ 内壁面
５１２ 右外壁部（外壁部）
５１２ａ 内壁面
５１３ 前外壁部（外壁部）
５１３ａ 内壁面
５１４ 後外壁部（外壁部）
５１４ａ 内壁面
５１５ 左第１連結部（壁連結部、第１連結部）
５１６ 左第２連結部（壁連結部、第２連結部）
５１７ 右第１連結部（壁連結部、第１連結部）
５１８ 右第２連結部（壁連結部、第２連結部）
５１９ 前第１連結部（壁連結部、第１連結部）
５２０ 前第２連結部（壁連結部、第２連結部）
５２１ 後第１連結部（壁連結部、第１連結部）
５２２ 後第２連結部（壁連結部、第２連結部）1 Film capacitor (capacitor)
10 capacitor element 11 first edge electrode (edge electrode)
12 second edge electrode (edge electrode)
30 Case 31 Case 100 Film capacitor (capacitor)
302 opening 303 peripheral wall 304 front wall (second wall)
305 rear wall (second wall)
306 bottom wall portion 307 left wall portion (first wall portion)
308 right wall (first wall)
309 protruding portion 311 left outer wall portion (outer wall portion)
311a inner wall surface 312 right outer wall portion (outer wall portion)
312a inner wall surface 313 left first connecting portion (wall connecting portion, first connecting portion)
314 left second joint (wall joint, second joint)
315 right first connection (wall connection, first connection)
316 right second connection (wall connection, second connection)
50 case 51 case 502 opening 503 peripheral wall 504 front wall (second wall)
505 rear wall (second wall)
506 bottom wall portion 507 left wall portion (first wall portion)
508 right wall (first wall)
509 Protruding portion 511 Left outer wall portion (outer wall portion)
511a inner wall surface 512 right outer wall portion (outer wall portion)
512a inner wall surface 513 front outer wall portion (outer wall portion)
513a inner wall surface 514 rear outer wall portion (outer wall portion)
514a inner wall surface 515 left first connecting portion (wall connecting portion, first connecting portion)
516 left second joint (wall joint, second joint)
517 right first connection (wall connection, first connection)
518 right second connection (wall connection, second connection)
519 front first connecting part (wall connecting part, first connecting part)
520 front second connecting part (wall connecting part, second connecting part)
521 rear first connection (wall connection, first connection)
522 rear second connection (wall connection, second connection)

Claims (8)

コンデンサ素子と、
前記コンデンサ素子が収容されるケースと、を備え、
前記ケースは、
周壁部と、
前記周壁部の少なくとも一部の外側に、当該周壁部と隙間を有するように設けられた外壁部と、
前記周壁部と前記外壁部との間に部分的に設けられ、当該周壁部と当該外壁部とを連結するための複数の壁連結部と、を含み、
前記コンデンサ素子は、当該コンデンサ素子の両端面に一対の端面電極を有し、
前記周壁部は、前記一対の端面電極にそれぞれ対向する一対の第１壁部と、前記コンデンサ素子の両側に配置され、前記一対の第１壁部の間を連結する一対の第２壁部と、を含み、
前記一対の第１壁部の外側に前記外壁部が設けられ、前記一対の第２壁部の外側に前記外壁部が設けられない、
コンデンサ。 a capacitor element;
and a case in which the capacitor element is accommodated,
Said case is
a peripheral wall;
an outer wall portion provided outside at least a portion of the peripheral wall portion so as to have a gap from the peripheral wall portion;
a plurality of wall connecting portions partially provided between the peripheral wall portion and the outer wall portion for connecting the peripheral wall portion and the outer wall portion ;
The capacitor element has a pair of end face electrodes on both end faces of the capacitor element,
The peripheral wall portion includes a pair of first wall portions facing the pair of end face electrodes, respectively, and a pair of second wall portions disposed on both sides of the capacitor element and connecting the pair of first wall portions. , including
The outer wall portion is provided outside the pair of first wall portions, and the outer wall portion is not provided outside the pair of second wall portions,
capacitor. コンデンサ素子と、a capacitor element;
前記コンデンサ素子が収容されるケースと、を備え、and a case in which the capacitor element is accommodated,
前記ケースは、Said case is
周壁部と、a peripheral wall;
前記周壁部の少なくとも一部の外側に、当該周壁部と隙間を有するように設けられた外壁部と、an outer wall portion provided outside at least a portion of the peripheral wall portion so as to have a gap from the peripheral wall portion;
前記周壁部と前記外壁部との間に部分的に設けられ、当該周壁部と当該外壁部とを連結するための複数の壁連結部と、を含み、a plurality of wall connecting portions partially provided between the peripheral wall portion and the outer wall portion for connecting the peripheral wall portion and the outer wall portion;
前記コンデンサ素子は、当該コンデンサ素子の両端面に一対の端面電極を有し、The capacitor element has a pair of end face electrodes on both end faces of the capacitor element,
前記周壁部は、前記一対の端面電極にそれぞれ対向する一対の第１壁部と、前記コンデンサ素子の両側に配置され、前記一対の第１壁部の間を連結する一対の第２壁部と、を含み、The peripheral wall portion includes a pair of first wall portions facing the pair of end face electrodes, respectively, and a pair of second wall portions disposed on both sides of the capacitor element and connecting the pair of first wall portions. , including
前記一対の第１壁部および前記一対の第２壁部の外側に前記外壁部が設けられる、The outer wall portion is provided outside the pair of first wall portions and the pair of second wall portions,
コンデンサ。capacitor. 請求項１または２に記載のコンデンサにおいて、
前記複数の壁連結部は、
前記外壁部の壁面に沿う第１の方向に間隔を有して並ぶ２つの第１連結部と、
前記２つの第１連結部と異なる位置に設けられ、前記第１の方向に間隔を有して並ぶ２つの第２連結部と、
を含み、
前記第１の方向から見たときに、前記外壁部の壁面に沿い前記第１の方向に直交する第２の方向において、前記２つの第１連結部と前記２つの第２連結部とは離れて配置されており、
前記第２の方向から見たときに、前記２つの第１連結部のそれぞれは、前記２つの第２連結部のそれぞれと重ならない、
コンデンサ。 3. In the capacitor according to claim 1 or 2 ,
The plurality of wall connecting portions are
two first connecting portions spaced apart in a first direction along the wall surface of the outer wall;
two second connecting portions provided at positions different from the two first connecting portions and arranged with a gap in the first direction;
including
When viewed from the first direction, the two first connecting portions and the two second connecting portions are separated from each other in a second direction orthogonal to the first direction along the wall surface of the outer wall portion. are placed at
When viewed from the second direction, each of the two first connecting portions does not overlap with each of the two second connecting portions,
capacitor. コンデンサ素子と、
前記コンデンサ素子が収容されるケースと、を備え、
前記ケースは、
周壁部と、
前記周壁部の少なくとも一部の外側に、当該周壁部と隙間を有するように設けられた外壁部と、を含み、
前記外壁部の前記周壁部に対向する内壁面は、前記外壁部の外縁部から中央部に向かうに従って前記周壁部と離れる形状を有している、
コンデンサ。 a capacitor element;
and a case in which the capacitor element is accommodated,
Said case is
a peripheral wall;
an outer wall portion provided outside at least a portion of the peripheral wall portion so as to have a gap with the peripheral wall portion;
The inner wall surface of the outer wall facing the peripheral wall has a shape that separates from the peripheral wall as it goes from the outer edge toward the center of the outer wall,
capacitor. 請求項４に記載のコンデンサにおいて、
前記外壁部の前記内壁面は、前記周壁部の壁面に沿い互いに直交する第１の方向および第２の方向の少なくとも何れかの方向において、直線的に屈曲または曲線的に湾曲している、
コンデンサ。 5. The capacitor of claim 4 ,
The inner wall surface of the outer wall portion is linearly bent or curved in at least one of a first direction and a second direction perpendicular to each other along the wall surface of the peripheral wall portion,
capacitor. 請求項４または請求項５に記載のコンデンサにおいて、
前記コンデンサ素子は、当該コンデンサ素子の両端面に一対の端面電極を有し、
前記周壁部は、前記一対の端面電極にそれぞれ対向する一対の第１壁部と、前記コンデンサ素子の両側に配置され、前記一対の第１壁部の間を連結する一対の第２壁部と、を含み、
前記一対の第１壁部の外側に前記外壁部が設けられ、前記一対の第２壁部の外側に前記外壁部が設けられない、
コンデンサ。 In the capacitor according to claim 4 or claim 5 ,
The capacitor element has a pair of end face electrodes on both end faces of the capacitor element,
The peripheral wall portion includes a pair of first wall portions facing the pair of end face electrodes, respectively, and a pair of second wall portions disposed on both sides of the capacitor element and connecting the pair of first wall portions. , including
The outer wall portion is provided outside the pair of first wall portions, and the outer wall portion is not provided outside the pair of second wall portions,
capacitor. 請求項４または請求項５に記載のコンデンサにおいて、
前記コンデンサ素子は、当該コンデンサ素子の両端面に一対の端面電極を有し、
前記周壁部は、前記一対の端面電極にそれぞれ対向する一対の第１壁部と、前記コンデンサ素子の両側に配置され、前記一対の第１壁部の間を連結する一対の第２壁部と、を含み、
前記一対の第１壁部および前記一対の第２壁部の外側に前記外壁部が設けられる、
コンデンサ。 In the capacitor according to claim 4 or claim 5 ,
The capacitor element has a pair of end face electrodes on both end faces of the capacitor element,
The peripheral wall portion includes a pair of first wall portions facing the pair of end face electrodes, respectively, and a pair of second wall portions disposed on both sides of the capacitor element and connecting the pair of first wall portions. , including
The outer wall portion is provided outside the pair of first wall portions and the pair of second wall portions,
capacitor. 請求項１～７のいずれか一項に記載のコンデンサにおいて、
前記ケースは、前記コンデンサ素子を収容するための開口部を有し、
前記周壁部は、前記ケースにおいて、前記開口部と反対側に位置する底壁部を含み、
前記底壁部には、前記開口部側に突出し、前記コンデンサ素子を、当該コンデンサ素子と前記底壁部との間に隙間が生じるように支える複数の突出部が設けられる、
コンデンサ。 In the capacitor according to any one of claims 1 to 7 ,
The case has an opening for accommodating the capacitor element,
The peripheral wall includes a bottom wall located on the opposite side of the opening in the case,
The bottom wall portion is provided with a plurality of projecting portions that project toward the opening portion and support the capacitor element so that a gap is formed between the capacitor element and the bottom wall portion.
capacitor.
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