JP3333284B2 - Aluminum electrolytic capacitors - Google Patents
Aluminum electrolytic capacitorsInfo
- Publication number
- JP3333284B2 JP3333284B2 JP22831793A JP22831793A JP3333284B2 JP 3333284 B2 JP3333284 B2 JP 3333284B2 JP 22831793 A JP22831793 A JP 22831793A JP 22831793 A JP22831793 A JP 22831793A JP 3333284 B2 JP3333284 B2 JP 3333284B2
- Authority
- JP
- Japan
- Prior art keywords
- resin plate
- elastic sealing
- sealing body
- electrolytic capacitor
- aluminum electrolytic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Electric Double-Layer Capacitors Or The Like (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、アルミニウム電解コン
デンサに関し、特に、その封口部側の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum electrolytic capacitor and, more particularly, to a structure on a sealing portion side thereof.
【０００２】[0002]
【従来の技術および発明が解決しようとする課題】アル
ミニウム電解コンデンサ（以下、電解コンデンサと称
す。）は、図６に示すように、電解液の含浸されたコン
デンサ素子６０がアルミニウムケース６１の内部に収容
されているため、電解液が蒸発しないように、アルミニ
ウムケース６１の開放端側は、ゴムパッキング６２（弾
性封口体）で封止されている。ここで、ゴムパッキング
６２にブチルゴムを用いても、電解液の揮散を十分に防
止できない場合には、ゴムパッキング６２にフッ素樹脂
板６５を貼り合わせて、ゴムパッキング６２に対する電
解液の浸透を抑制する方法が考えられる。2. Description of the Related Art As shown in FIG. 6, an aluminum electrolytic capacitor (hereinafter referred to as an electrolytic capacitor) has a capacitor element 60 impregnated with an electrolytic solution inside an aluminum case 61. Since it is contained, the open end side of the aluminum case 61 is sealed with a rubber packing 62 (elastic sealing body) so that the electrolyte does not evaporate. Here, if the volatilization of the electrolyte cannot be sufficiently prevented even if butyl rubber is used for the rubber packing 62, a fluororesin plate 65 is attached to the rubber packing 62 to suppress the permeation of the electrolyte into the rubber packing 62. A method is conceivable.
【０００３】しかしながら、フッ素樹脂板貼りのゴムパ
ッキング６２を用いた電解コンデンサにおいて、従来ど
おり、横絞り部６１ａの押圧力のみで気密を確保しよう
とすると、フッ素樹脂板の硬度が高いため、ゴムパッキ
ング６２が薄い場合には、逆に気密性が損なわれる場合
がある。すなわち、ゴムパッキング６２の下端面に硬度
が高い樹脂板があると、横絞り部６１ａによる押圧力が
ゴムパッキング６２に対して均等に加わらず、ゴムパッ
キング６２に不自然な応力がかかるため、リード引出し
孔６２ａ、６２の内周面とリード線６３、６４の外周面
との間に隙間が発生し、リード引出し孔６２ａ、６２ｂ
で気密不良が生じるからである。However, in the electrolytic capacitor using the rubber packing 62 bonded to the fluororesin plate, if the airtightness is to be ensured only by the pressing force of the horizontal drawing portion 61a as in the conventional case, the hardness of the fluororesin plate is high. When 62 is thin, airtightness may be impaired. That is, if there is a resin plate having a high hardness on the lower end surface of the rubber packing 62, the pressing force of the horizontal drawing portion 61a is not evenly applied to the rubber packing 62, and an unnatural stress is applied to the rubber packing 62. A gap is generated between the inner peripheral surfaces of the lead holes 62a, 62 and the outer peripheral surfaces of the lead wires 63, 64, and the lead extraction holes 62a, 62b
This causes poor airtightness.
【０００４】以上の問題点に鑑みて、本発明の課題は、
封口体の裏面側に樹脂板を配置して、電解液の揮散を防
止すると共に、樹脂板を設けても、気密性が損なわれな
いアルミニウム電解コンデンサを提供することにある。[0004] In view of the above problems, the object of the present invention is to:
It is an object of the present invention to provide an aluminum electrolytic capacitor in which a resin plate is disposed on the back side of a sealing body to prevent volatilization of an electrolytic solution and that airtightness is not impaired even when a resin plate is provided.
【０００５】[0005]
【課題を解決するための手段および作用】上記課題を解
決するために、本発明では、γ−ブチロラクトン系電解
液などが含浸されたコンデンサ素子のリード線がリード
引出し孔に挿通した弾性封口体をコンデンサケースの開
放端側でコンデンサケースに対する横絞り部および上絞
り部によって固定した電解コンデンサ（アルミニウム電
解コンデンサ）において、コンデンサ素子と弾性封口体
との間には、双方の端面に接する樹脂板を有することを
第１の特徴とする。 In order to solve the above-mentioned problems, according to the present invention, there is provided an elastic sealing body in which a lead wire of a capacitor element impregnated with a γ-butyrolactone-based electrolyte or the like is inserted through a lead outlet hole. In an electrolytic capacitor (aluminum electrolytic capacitor) fixed on the open end side of the capacitor case by a laterally drawn portion and an upper drawn portion with respect to the capacitor case, a resin plate in contact with both end surfaces is provided between the capacitor element and the elastic sealing body. That
This is the first feature.
【０００６】すなわち、樹脂板を弾性封口体の端面を覆
う状態に配置したことに特徴を有する。従って、弾性封
口体に対する電解液の透過は、樹脂板で抑制される。こ
こで、樹脂板が弾性封口体と別体の場合には、弾性封口
体の裏面側に樹脂板があっても、横絞り部から加わった
押圧力は、弾性封口体に均一に加わり、リード引出し孔
の内周面とリード線の外周面とが完全に密着する。本発
明において、樹脂板とは、比較的厚い板状のものの他
に、厚さが１〜２００μｍ程度の薄いシート状のものも
含む。 That is, it is characterized in that the resin plate is arranged so as to cover the end face of the elastic sealing body. Therefore, the permeation of the electrolyte through the elastic sealing body is suppressed by the resin plate. Here, when the resin plate is separate from the elastic sealing member, even if the resin plate is on the back side of the elastic sealing member, the pressing force applied from the horizontal drawing portion is uniformly applied to the elastic sealing member, and the lead is The inner peripheral surface of the lead hole and the outer peripheral surface of the lead wire are completely adhered. In the present invention, the resin plate includes a relatively thick plate and a thin sheet having a thickness of about 1 to 200 μm.
【０００７】また、本発明においては、樹脂板に対し
て、リード引出し孔に連通する位置にリード線の外径に
比して小さい内径の透孔、たとえば、リード線の外径の
約０．６０倍から約０．９５倍の外径寸法を有する透孔
を形成し、この透孔に対して、リード線を圧入すること
によって、リード線の外周面と透孔の内周面とを圧接
し、そこでも気密を確保することが好ましい。この場合
には、透孔の内周縁が、リード線によってリード引出し
孔の内部にやや引き込まれた状態になる。Further, in the present invention, a through hole having an inner diameter smaller than the outer diameter of the lead wire, for example, about 0.1 mm of the outer diameter of the lead wire, is provided at a position communicating with the lead extraction hole with respect to the resin plate. A through hole having an outer diameter dimension of 60 times to about 0.95 times is formed, and a lead wire is press-fitted into this through hole to press-fit the outer peripheral surface of the lead wire and the inner peripheral surface of the through hole. However, it is preferable to ensure airtightness there as well. In this case, the inner peripheral edge of the through hole is slightly drawn into the lead drawing hole by the lead wire.
【０００８】また、弾性封口体のコンデンサ素子側の端
面に、例えば、リード引出し孔に連通する位置にリード
線の外径に比して小さい内径の透孔が形成された耐薬品
性の高い樹脂からなる樹脂板を貼り付け、その透孔に対
して、リード線を圧入した構成としてもよい。 A resin having high chemical resistance and having a through hole having an inner diameter smaller than the outer diameter of the lead wire formed at an end face of the elastic sealing body on the side of the capacitor element, for example, at a position communicating with the lead drawing hole. A configuration may be adopted in which a resin plate made of is adhered and lead wires are press-fitted into the through holes .
【０００９】すなわち、弾性封口体のコンデンサ素子側
の端面には樹脂板を貼り付けてあるため、弾性封口体に
対する電解液の透過は、樹脂板で抑制される。ここで、
弾性封口体と樹脂板とは、一体であるため、横絞り部か
ら加わった押圧力が弾性封口体に均一に加わらないこと
が懸念されるが、リード線を樹脂板の透孔に対して圧入
して、リード線の外周面と透孔の内周面とを圧接してあ
るため、そこでも気密を確保できる。すなわち、リード
線の外周面は、リード引出し孔の内周面および透孔の内
周面の双方に密着するため、弾性封口体が薄い場合で
も、リード引出し孔における気密を十分に確保できる。That is, since the resin plate is attached to the end face of the elastic sealing body on the side of the capacitor element, the permeation of the electrolyte through the elastic sealing body is suppressed by the resin plate. here,
Since the elastic sealing body and the resin plate are integral with each other, there is a concern that the pressing force applied from the horizontal drawing portion may not be applied uniformly to the elastic sealing body.However, the lead wires are pressed into the through holes of the resin plate. Since the outer peripheral surface of the lead wire and the inner peripheral surface of the through hole are pressed against each other, airtightness can be ensured there as well. That is, since the outer peripheral surface of the lead wire is in close contact with both the inner peripheral surface of the lead extraction hole and the inner peripheral surface of the through hole, airtightness in the lead extraction hole can be sufficiently ensured even when the elastic sealing body is thin.
【００１０】また、本発明では、前記樹脂板にコンデン
サ素子の側面を覆う側面部を設けたことを第２の特徴と
する。このため、本発明では、コンデンサ素子の側面部
からの電解液の蒸発も抑制しているので、コンデンサ素
子のドライアップをより確実に防止できる。 Further , according to the present invention, the resin plate has
The second feature is that a side surface portion that covers the side surface of the element is provided.
I do. For this reason, in the present invention, the side portion of the capacitor element
The evaporation of the electrolyte from
Dry-up of the child can be more reliably prevented.
【００１１】本発明において、樹脂板には、透孔周縁か
らリード引出し孔内に延びる管部を設け、この管部内に
リード線を圧入することが好ましい。 [0011] In the present invention, the resin plate is provided with
A pipe extending into the lead withdrawal hole from the
It is preferable to press-fit the lead wire.
【００１２】本発明において、耐薬品性の高い樹脂と
は、ポリビニルアルコール、ポリビニルアルコールの共
重合体、ポリアミド、シリコン樹脂、フッ素樹脂または
ポリピロールなどのように、電解コンデンサの電解液に
用いる溶媒および溶質に対して化学的な安定性が高い絶
縁性の樹脂を意味する。In the present invention, a resin having high chemical resistance means a solvent and a solute used for an electrolytic solution of an electrolytic capacitor, such as polyvinyl alcohol, a copolymer of polyvinyl alcohol, polyamide, silicone resin, fluororesin and polypyrrole. Means an insulating resin having high chemical stability.
【００１３】[0013]
【実施例】つぎに、添付図面を参照して、本発明の実施
例および参考例を説明する。EXAMPLES Next, with reference to the accompanying drawings, embodiments of the present invention
Examples and reference examples will be described.
【００１４】〔参考例１〕 図１（ａ）は、参考例１に係る電解コンデンサの縦断面
図、図１（ｂ）は、それに用いた弾性封口体および樹脂
板の斜視図であり、実施例１として後述するように、こ
のような形態の樹脂板に本発明を適用してもよい。 Reference Example 1 FIG. 1A is a longitudinal sectional view of an electrolytic capacitor according to Reference Example 1 , and FIG. 1B is a perspective view of an elastic sealing body and a resin plate used therein. As described below as Example 1,
The present invention may be applied to a resin plate having the following configuration.
【００１５】本例の電解コンデンサ１０は、定格が１０
ｗｖの１０００μＦ、長さ寸法が１５ｍｍのアルミニウ
ム電解コンデンサであって、γ−ブチロラクトン（主溶
媒）にフタル酸水素テトラメチルアンモニウムなどを溶
解した電解液が含浸されたコンデンサ素子３と、２本の
リード線４、５が貫通するリード引出し孔２ａ、２ｂが
形成された厚さが３ｍｍの弾性封口体２（ブチルゴムパ
ッキング）と、弾性封口体２で密封されたアルミニウム
ケース６とを有する。弾性封口体２は、アルミニウムケ
ース６の開放端側において、アルミニウムケース６の横
絞り部６ａおよび上絞り部６ｂによって固定されて、ア
ルミニウムケース６の内部にコンデンサ素子３を密封し
ている。なお、リード線４、５は、コンデンサ素子３の
側の丸棒部と称せられるアルミニウム部４ａ、５ａと、
その先端側のＣＰ線４ｂ、５ｂとを有する。The electrolytic capacitor 10 of this embodiment has a rating of 10
An aluminum electrolytic capacitor having a wv of 1000 μF and a length of 15 mm, comprising a capacitor element 3 in which γ-butyrolactone (main solvent) is impregnated with an electrolyte solution such as tetramethylammonium hydrogen phthalate, and two leads It has a 3 mm-thick elastic sealing body 2 (butyl rubber packing) in which lead extraction holes 2a and 2b through which the wires 4 and 5 penetrate are formed, and an aluminum case 6 sealed with the elastic sealing body 2. The elastic sealing body 2 is fixed on the open end side of the aluminum case 6 by a horizontal drawing portion 6a and an upper drawing portion 6b of the aluminum case 6, and seals the capacitor element 3 inside the aluminum case 6. In addition, the lead wires 4 and 5 have aluminum portions 4 a and 5 a referred to as round bar portions on the side of the capacitor element 3,
It has CP lines 4b and 5b on the tip side.
【００１６】本例の電解コンデンサ１０は、弾性封口体
２の下端面２ｃと、コンデンサ素子３の上端面３ａとの
間に耐薬品性の高いフッ素樹脂製（４−フッ化エチレン
樹脂製）の厚さが約１０μｍの円板状の樹脂板１１を有
する。樹脂板１１には、弾性封口体２のリード引出し孔
２ａ、２ｂに連通する位置に、リード線４、５の外径に
比してやや大きな内径の透孔１１ａ、１１ｂが形成され
ており、これらの透孔１１ａ、１１ｂをリード線４、５
が貫通する状態にある。ここで、弾性封口体２と樹脂板
１１とは、それぞれ別体の部材であり、電解コンデンサ
１０の製造工程において、コンデンサ素子３に弾性封口
体２を取り付ける前に、コンデンサ素子３から突出する
リード線４、５を透孔１１ａ、１１ｂに通すことによっ
て、樹脂板１１は、コンデンサ素子３に取り付けられ
る。The electrolytic capacitor 10 of this embodiment is made of a fluorine resin (4-fluoroethylene resin) having high chemical resistance between the lower end surface 2c of the elastic sealing body 2 and the upper end surface 3a of the capacitor element 3. It has a disk-shaped resin plate 11 having a thickness of about 10 μm. In the resin plate 11, through holes 11a and 11b having an inner diameter slightly larger than the outer diameter of the lead wires 4 and 5 are formed at positions communicating with the lead extraction holes 2a and 2b of the elastic sealing body 2. Through holes 11a and 11b to lead wires 4 and 5
Are in a penetrating state. Here, the elastic sealing body 2 and the resin plate 11 are separate members, respectively. In the manufacturing process of the electrolytic capacitor 10, a lead projecting from the capacitor element 3 before attaching the elastic sealing body 2 to the capacitor element 3. The resin plate 11 is attached to the capacitor element 3 by passing the wires 4 and 5 through the through holes 11a and 11b.
【００１７】このように構成した電解コンデンサ１０で
は、弾性封口体２の下端面２ｃに対して樹脂板１１が密
着し、弾性封口体２の下端面２ｃは、樹脂板１１で覆わ
れているので、弾性封口体２に対する電解液の浸透が抑
制されている。ここで、電解液が弾性封口体２から透過
する速度は、電解液が弾性封口体２に浸透する速度と、
電解液が弾性封口体２を拡散する速度とによって規定さ
れ、そのうち、本例の電解コンデンサ１０では、電解液
が弾性封口体２に浸透する速度が極めて低い。それ故、
電解液が弾性封口体２から透過する速度が低いため、コ
ンデンサ素子３のドライアップが抑制されるので、電解
コンデンサ１０を長寿命化できる。また、樹脂板１１
は、コンデンサ素子３の上端面３ａにも密着して、コン
デンサ素子３の側では、電解液の蒸発面積が狭い。この
ため、コンデンサ素子３からの電解液の蒸発速度が低い
ので、コンデンサ素子３のドライアップをより抑制する
ことができる。In the electrolytic capacitor 10 configured as described above, the resin plate 11 is in close contact with the lower end surface 2c of the elastic sealing member 2, and the lower end surface 2c of the elastic sealing member 2 is covered with the resin plate 11. In addition, the penetration of the electrolytic solution into the elastic sealing body 2 is suppressed. Here, the speed at which the electrolytic solution permeates through the elastic sealing body 2 is determined by the speed at which the electrolytic solution permeates the elastic sealing body 2,
The rate at which the electrolytic solution diffuses through the elastic sealing body 2 is defined. Among these, in the electrolytic capacitor 10 of the present example, the speed at which the electrolytic solution permeates the elastic sealing body 2 is extremely low. Therefore,
Since the speed at which the electrolytic solution permeates through the elastic sealing body 2 is low, the dry-up of the capacitor element 3 is suppressed, so that the life of the electrolytic capacitor 10 can be extended. Also, the resin plate 11
Is also in close contact with the upper end surface 3a of the capacitor element 3, and the evaporation area of the electrolytic solution is narrow on the capacitor element 3 side. For this reason, since the evaporation rate of the electrolytic solution from the capacitor element 3 is low, the dry-up of the capacitor element 3 can be further suppressed.
【００１８】また、本例の電解コンデンサ１０では、弾
性封口体２と樹脂板１１とが別体であるため、樹脂板１
１は、横絞り部６ａによる気密を妨げない。すなわち、
樹脂板１１と弾性封口体２とを積層した複合封口体を用
いた場合には、樹脂板１１の硬度が高いので、弾性封口
体２を薄くすると、横絞り部６ａによる押圧力が弾性封
口体２の下端面２ｃの側に均等に加わらず、リード引出
し孔２ａ、２ｂの内周面とアルミニウム部４ａ、５ａの
外周面との間に隙間が発生することが懸念されるが、本
例では、弾性封口体２と樹脂板１１とが別体であるた
め、横絞り部６ａによる押圧力は、弾性封口体２の下端
面２ｃの側にも均等に加わるので、リード引出し孔２
ａ、２ｂの内周面とアルミニウム部４ａ、５ａの外周面
とが完全に密着し、樹脂板１１の存在は、リード引出し
孔２ａ、２ｂ内における気密を妨げない。In the electrolytic capacitor 10 of this embodiment, since the elastic sealing body 2 and the resin plate 11 are separate bodies, the resin plate 1
No. 1 does not prevent airtightness by the horizontal drawing portion 6a. That is,
When a composite sealing body in which the resin plate 11 and the elastic sealing body 2 are laminated is used, since the hardness of the resin plate 11 is high, when the elastic sealing body 2 is made thin, the pressing force by the horizontal drawing portion 6a is reduced. There is a concern that a gap may be generated between the inner peripheral surfaces of the lead extraction holes 2a, 2b and the outer peripheral surfaces of the aluminum portions 4a, 5a without being equally applied to the lower end surface 2c side of the lead 2. Since the elastic sealing body 2 and the resin plate 11 are separate bodies, the pressing force of the horizontal drawing portion 6a is equally applied to the lower end surface 2c of the elastic sealing body 2 so that the lead extraction hole 2
The inner peripheral surfaces of the a and 2b and the outer peripheral surfaces of the aluminum portions 4a and 5a are completely adhered to each other, and the presence of the resin plate 11 does not prevent airtightness in the lead extraction holes 2a and 2b.
【００１９】〔実施例１〕 図２（ａ）は、実施例１に係る電解コンデンサの縦断面
図、図２（ｂ）は、それに用いた弾性封口体および樹脂
板の斜視図である。ここで、本例の電解コンデンサおよ
び以降に説明する各電解コンデンサは、いずれも、基本
的な構成が参考例１に係る電解コンデンサと同様である
ため、共通する部分には同符号を付して、それらの詳細
な説明を省略する。 Example 1 FIG. 2A is a longitudinal sectional view of an electrolytic capacitor according to Example 1 , and FIG. 2B is a perspective view of an elastic sealing body and a resin plate used therein. Here, the electrolytic capacitor of this example and each of the electrolytic capacitors described below have the same basic configuration as the electrolytic capacitor according to Reference Example 1. , And detailed description thereof will be omitted.
【００２０】本例の電解コンデンサ２０も、弾性封口体
２の下端面２ｃと、コンデンサ素子３の上端面３ａとの
間に、耐薬品性の高いフッ素樹脂製の厚さが約１００μ
ｍの樹脂板２１を有し、この樹脂板２１も、弾性封口体
２とは別体である。The electrolytic capacitor 20 of this embodiment also has a highly chemically resistant fluororesin having a thickness of about 100 μm between the lower end surface 2c of the elastic sealing body 2 and the upper end surface 3a of the capacitor element 3.
m, and this resin plate 21 is also separate from the elastic sealing body 2.
【００２１】樹脂板２１には、弾性封口体２のリード引
出し孔２ａ、２ｂに連通する位置に、透孔２１ａ、２１
ｂが形成されている。ここで、透孔２１ａ、２１ｂは、
リード線４、５を通す前、すなわち、電解コンデンサ１
０の組立前においては、内径がリード線４、５のアルミ
ニウム部４ａ、５ａの外径に比してやや小さい。このた
め、本例では、電解コンデンサ１０の組立工程におい
て、アルミニウム部４ａ、５ａを透孔２１ａ、２１ｂに
対して圧入することによって、アルミニウム部４ａ、５
ａの外周面を透孔２１ａ、２１ｂの内周面に圧接した状
態にする。The resin plate 21 has through holes 21a, 21b at positions communicating with the lead extraction holes 2a, 2b of the elastic sealing body 2.
b is formed. Here, the through holes 21a and 21b are
Before passing the lead wires 4 and 5, that is, the electrolytic capacitor 1
Before assembling, the inner diameter is slightly smaller than the outer diameter of the aluminum portions 4a, 5a of the lead wires 4, 5. For this reason, in this example, in the assembly process of the electrolytic capacitor 10, the aluminum portions 4a, 5a are press-fitted into the through holes 21a, 21b, so that the aluminum portions 4a, 5b are pressed.
The outer peripheral surface of a is brought into pressure contact with the inner peripheral surfaces of the through holes 21a and 21b.
【００２２】さらに、樹脂板２１は、その外周縁から下
方に向かって延びてコンデンサ素子３の側面３ｂを覆う
筒状の側面部２１ｃを有する。Further, the resin plate 21 has a cylindrical side surface portion 21c extending downward from the outer peripheral edge thereof and covering the side surface 3b of the capacitor element 3.
【００２３】このように構成した電解コンデンサ２０で
は、弾性封口体２と樹脂板２１とは、それぞれ別体の部
材であるため、樹脂板２１があるにかかわらず、横絞り
部６ａからの押圧力が弾性封口体２に対して均一に加わ
り、リード引出し孔２ａ、２ｂの内周面は、アルミニウ
ム部４ａ、５ａの外周面に密着している。従って、リー
ド引出し孔２ａ、２ｂ内における気密を確保したまま、
樹脂板２１によって、弾性封口体２の下端面２ｃおよび
コンデンサ素子３の上端面３ａを覆い、コンデンサ素子
３のドライアップを防止できる。In the electrolytic capacitor 20 configured as described above, the elastic sealing body 2 and the resin plate 21 are separate members, and therefore, regardless of the presence of the resin plate 21, the pressing force from the horizontal drawing portion 6a is provided. Is uniformly applied to the elastic sealing body 2, and the inner peripheral surfaces of the lead extraction holes 2a, 2b are in close contact with the outer peripheral surfaces of the aluminum portions 4a, 5a. Therefore, while maintaining airtightness in the lead extraction holes 2a and 2b,
The resin plate 21 covers the lower end surface 2c of the elastic sealing body 2 and the upper end surface 3a of the capacitor element 3, and prevents the capacitor element 3 from drying up.
【００２４】また、アルミニウム部４ａ、５ａの外径に
比してやや小さな内径の透孔２１ａ、２１ｂを樹脂板２
１に設け、この透孔２１ａ、２１ｂに対して、アルミニ
ウム部４ａ、５ａを圧入してある。従って、アルミニウ
ム部４ａ、５ａの外周面は、透孔２１ａ、２１ｂの内周
面に圧接し、リード引出し孔２ａ、２ｂの内部に電解液
が這い上がることを防止している。それ故、リード引出
し孔２ａ、２ｂの内周面が電解液によって膨潤しにく
い。また、リード線４、５に電位が印加されても、リー
ド引出し孔２ａ、２ｂの内部に電解液中の４級アンモニ
ウムイオンなどが引き寄せられることがなく、引き寄せ
られたイオンによって、リード引出し孔２ａ、２ｂの内
周面が劣化することがない。それ故、長期間にわたっ
て、リード引出し孔２ａ、２ｂにおける気密を確保でき
るので、液漏れなどの不具合が発生しない。The through holes 21a, 21b having an inner diameter slightly smaller than the outer diameter of the aluminum portions 4a, 5a are
The aluminum portions 4a and 5a are press-fitted into the through holes 21a and 21b. Therefore, the outer peripheral surfaces of the aluminum portions 4a and 5a are pressed against the inner peripheral surfaces of the through holes 21a and 21b to prevent the electrolytic solution from creeping up inside the lead extraction holes 2a and 2b. Therefore, the inner peripheral surfaces of the lead extraction holes 2a and 2b are unlikely to swell with the electrolytic solution. Also, even when a potential is applied to the lead wires 4 and 5, quaternary ammonium ions and the like in the electrolytic solution are not drawn into the lead drawing holes 2a and 2b. 2b does not deteriorate. Therefore, airtightness in the lead extraction holes 2a and 2b can be ensured for a long period, so that troubles such as liquid leakage do not occur.
【００２５】さらに、本例の電解コンデンサ２０では、
樹脂板２１の側面部２１ｃがコンデンサ素子２の側面部
３ｂを覆って、コンデンサ素子３の側面部３ｂからの電
解液の蒸発も抑制しているので、コンデンサ素子３のド
ライアップをより確実に防止できる。Further, in the electrolytic capacitor 20 of this embodiment,
Since the side portion 21c of the resin plate 21 covers the side portion 3b of the capacitor element 2 and also suppresses the evaporation of the electrolyte from the side portion 3b of the capacitor element 3, the dry-up of the capacitor element 3 is more reliably prevented. it can.
【００２６】〔実施例２〕 図３（ａ）は、実施例２に係る電解コンデンサの縦断面
図、図３（ｂ）は、それに用いた弾性封口体および樹脂
板の斜視図である。本例の電解コンデンサは、実施例１
に係る電解コンデンサの改良例に相当する。 Example 2 FIG. 3 (a) is a longitudinal sectional view of an electrolytic capacitor according to Example 2 , and FIG. 3 (b) is a perspective view of an elastic sealing body and a resin plate used therein. Example 1
Of the electrolytic capacitor according to the present invention.
【００２７】すなわち、本例の電解コンデンサ３０も、
弾性封口体２の下端面２ｃと、コンデンサ素子３の上端
面３ａとの間に耐薬品性の高いフッ素樹脂製の厚さが約
１００μｍの樹脂板３１を有し、この樹脂板３１も、弾
性封口体２とは別体である。絶縁板３１には、弾性封口
体２のリード引出し孔２ａ、２ｂに連通する位置に、内
径がリード線４、５のアルミニウム部４ａ、５ａの外径
に比してやや小さい透孔２１ａ、２１ｂが形成され、さ
らに、絶縁板３１の背面側には、透孔２１ａ、２１ｂの
周縁から延びる管部３１ａ、３１ｂが形成されている。
ここで、管部３１ａ、３１ｂの内径も、透孔２１ａ、２
１ｂと同じく、リード線４、５のアルミニウム部４ａ、
５ａの外径に比してやや小さい。That is, the electrolytic capacitor 30 of this embodiment is also
Between the lower end surface 2c of the elastic sealing body 2 and the upper end surface 3a of the capacitor element 3, there is provided a resin plate 31 made of fluororesin having high chemical resistance and having a thickness of about 100 μm. It is separate from the sealing body 2. In the insulating plate 31, through holes 21a and 21b whose inner diameters are slightly smaller than the outer diameters of the aluminum portions 4a and 5a of the lead wires 4 and 5 are provided at positions communicating with the lead extraction holes 2a and 2b of the elastic sealing body 2. On the back side of the insulating plate 31, there are formed tube portions 31a and 31b extending from the periphery of the through holes 21a and 21b.
Here, the inner diameters of the pipe portions 31a and 31b are also different from those of the through holes 21a and 2b.
1b, the aluminum portions 4a of the lead wires 4, 5;
It is slightly smaller than the outer diameter of 5a.
【００２８】ここで、樹脂板３１は、フッ素樹脂製であ
るため、弾性封口体２に比して可撓性が低いので、横絞
り部６ａ、６ｂからの押圧力のみでは、管部３１ａ、３
１ｂの外周面と、リード引出し孔２ａ、２ｂの内周面と
を密着させることはできても、管部３１ａ、３１ｂの内
周面と、リード線４、５のアルミニウム部４ａ、５ａの
外周面とを完全に密着させることができない。Here, since the resin plate 31 is made of a fluororesin, the flexibility thereof is lower than that of the elastic sealing body 2, so that only the pressing force from the horizontal drawing portions 6a and 6b, the tube portions 31a, 3
1b and the inner peripheral surfaces of the lead extraction holes 2a and 2b can be brought into close contact with each other, but the inner peripheral surfaces of the tube portions 31a and 31b and the outer peripheral portions of the aluminum portions 4a and 5a of the lead wires 4 and 5 can be obtained. The surface cannot be completely adhered.
【００２９】そこで、本例では、透孔２１ａ、２１ｂお
よび管部３１ａ、３１ｂの内径をアルミニウム部４ａ、
５ａの外径よりも小さく設定し、これらの透孔２１ａ、
２１ｂおよび管部３１ａ、３１ｂの内部にアルミニウム
部４ａ、５ａを圧入することによって、アルミニウム部
４ａ、５ａの外周面を透孔２１ａ、２１ｂおよび管部３
１ａ、３１ｂの内周面に圧接してある。Therefore, in the present embodiment, the inner diameters of the through holes 21a, 21b and the pipe portions 31a, 31b are set to the aluminum portions 4a,
5a are set smaller than the outer diameter of the through holes 21a,
By press-fitting the aluminum portions 4a, 5a into the insides of the aluminum portions 4a, 5a, the outer peripheral surfaces of the aluminum portions 4a, 5a are inserted into the through holes 21a, 21b and the tube portion 3a.
They are pressed against the inner peripheral surfaces of 1a and 31b.
【００３０】従って、本例の電解コンデンサ３０におい
ては、可撓性の小さな管部３１ａ、３１ｂをリード引出
し孔２ａ、２ｂの内部に配置しても、そこでの気密が完
全に保持される。それ故、弾性封口体２の下端面２ｃが
樹脂板３１で覆われているため、弾性封口体２からの電
解液の透過が抑制されるなど、実施例１に係る電解コン
デンサと同様な効果を奏するのに加えて、リード引出し
孔２ａ、２ｂ内部における気密性も高い。しかも、樹脂
板２１の側面部２１ｃがコンデンサ素子２の側面部３ｂ
を覆って、コンデンサ素子３の側面部３ｂからの電解液
の蒸発も抑制しているので、コンデンサ素子３のドライ
アップをより確実に防止できる。 Therefore, in the electrolytic capacitor 30 of this embodiment, even if the small flexible tube portions 31a and 31b are arranged inside the lead extraction holes 2a and 2b, the airtightness there is completely maintained. Therefore, since the lower end surface 2c of the elastic sealing body 2 is covered with the resin plate 31, the same effect as the electrolytic capacitor according to the first embodiment, such as suppression of the permeation of the electrolytic solution from the elastic sealing body 2, is obtained. In addition to the performance, the airtightness inside the lead extraction holes 2a and 2b is high. Moreover, resin
The side 21c of the plate 21 is the side 3b of the capacitor element 2.
And the electrolytic solution from the side portion 3b of the capacitor element 3
Of the capacitor element 3
Up can be prevented more reliably.
【００３１】また、管部３１ａ、３１ｂの外周面と、リ
ード引出し孔２ａ、２ｂの内周面と間に電解液が這い上
がることがないので、リード引出し孔２ａ、２ｂの内周
面は、電解液によって膨潤しない。また、リード線４、
５に電位が印加されても、電解液中のイオンは、リード
引出し孔２ａ、２ｂに内周面に引き寄せられないので、
リード引出し孔２ａ、２ｂの内周面は、電解液中のイオ
ンによっても劣化しない。それ故、コンデンサ素子３の
ドライアップを防止できると共に、リード引出し孔２
ａ、２ｂからの液漏れを防止できる。Since the electrolyte does not creep between the outer peripheral surfaces of the pipe portions 31a and 31b and the inner peripheral surfaces of the lead extraction holes 2a and 2b, the inner peripheral surfaces of the lead extraction holes 2a and 2b are Does not swell due to electrolyte. Also, lead wire 4,
Even if a potential is applied to 5, ions in the electrolytic solution are not attracted to the inner peripheral surfaces by the lead extraction holes 2a and 2b,
The inner peripheral surfaces of the lead extraction holes 2a and 2b are not deteriorated by ions in the electrolyte. Therefore, the dry-up of the capacitor element 3 can be prevented and the lead extraction hole 2
Liquid leakage from a and 2b can be prevented.
【００３２】〔参考例２〕 図４（ａ）は、参考例２に係る電解コンデンサの縦断面
図、図４（ｂ）は、それに用いた弾性封口体の斜視図で
あり、このような形態の樹脂板に本発明を適用してもよ
い。 [0032] Reference Example 2 4 (a) is a longitudinal sectional view of the electrolytic capacitor according to a reference example 2, FIG. 4 (b), <br/> Oh Ri perspective view of an elastic sealing body used therewith However, the present invention may be applied to a resin plate having such a form.
No.
【００３３】本例の電解コンデンサ４０も、弾性封口体
２の下端面２ｃと、コンデンサ素子３の上端面３ａとの
間に、耐薬品性の高いポリビニルアルコールからなる円
板状の厚さが約１００μｍの樹脂板４１（樹脂層）を有
する。The electrolytic capacitor 40 of this embodiment also has a disk-like thickness made of polyvinyl alcohol having high chemical resistance between the lower end surface 2c of the elastic sealing body 2 and the upper end surface 3a of the capacitor element 3. It has a resin plate 41 (resin layer) of 100 μm.
【００３４】ここで、樹脂板４１は、弾性封口体２の下
端面２ｃに貼り合わされた状態にあって、樹脂板４１と
弾性封口体２とは、一体となって複合封口体４０ａを構
成している。樹脂板４１には、弾性封口体２のリード引
出し孔２ａ、２ｂに連通する位置に、リード線４、５の
外径に比して小さな内径の透孔４１ａ、４１ｂ、本例で
は、リード線４、５のアルミニウム部４ａ、５ｂの外径
に対して約０．６０倍から約０．９５倍の内径の透孔４
１ａ、４１ｂが形成されている。このため、本例では、
リード線４、５のアルミニウム部４ａ、５ａを透孔４１
ａ、４１ｂに対して圧入することによって、アルミニウ
ム部４ａ、５ａを透孔４１ａ、４１ｂに挿通してあり、
アルミニウム部４ａ、５ａの外周面は、透孔４１ａ、４
１ｂの内周面に圧接した状態にある。従って、樹脂板４
１の透孔４１ａ、４１ｂの内周縁は、リード線４、５の
アルミニウム部４ａ、５ａによってリード引出し孔２
ａ、２ｂの内部にやや引き込まれた状態にある。Here, the resin plate 41 is in a state of being bonded to the lower end surface 2c of the elastic sealing member 2, and the resin plate 41 and the elastic sealing member 2 integrally form a composite sealing member 40a. ing. In the resin plate 41, through holes 41 a and 41 b having an inner diameter smaller than the outer diameter of the lead wires 4 and 5 are provided at positions communicating with the lead extraction holes 2 a and 2 b of the elastic sealing body 2. Through holes 4 having an inner diameter of about 0.60 to about 0.95 times the outer diameter of the aluminum portions 4a and 5b
1a and 41b are formed. For this reason, in this example,
The aluminum portions 4a, 5a of the lead wires 4, 5 are inserted through the through holes 41.
The aluminum portions 4a and 5a are inserted into the through holes 41a and 41b by press-fitting the holes 41a and 41b,
The outer peripheral surfaces of the aluminum portions 4a, 5a
1b is in pressure contact with the inner peripheral surface. Therefore, the resin plate 4
The inner peripheries of the through holes 41a and 41b are formed by the aluminum portions 4a and 5a of the lead wires 4 and 5, respectively.
a, 2b are slightly drawn into the interior.
【００３５】このように構成した電解コンデンサ４０で
は、弾性封口体２の下端面２ｃが電解液に接触しないた
め、弾性封口体２に対する電解液の浸透が抑制され、電
解液が弾性封口体２から透過する速度は、著しく低い。
しかも、ポリビニルアルコールのガス透過係数は、たと
えば、酸素のガス透過係数で表すと、０．０００５２×
10-10 〔cm -3(STP)cm -1s -1cmHg -1〕であり、極めて
小さい。それ故、コンデンサ素子３のドライアップが防
止されるので、電解コンデンサ４０を長寿命化できる。In the electrolytic capacitor 40 configured as described above, since the lower end surface 2c of the elastic sealing body 2 does not come into contact with the electrolytic solution, the penetration of the electrolytic solution into the elastic sealing body 2 is suppressed, and the electrolytic solution is removed from the elastic sealing body 2. The speed of transmission is significantly lower.
In addition, the gas permeability coefficient of polyvinyl alcohol is, for example, 0.00052 ×
10 -10 [cm -3 (STP) cm -1 s -1 cmHg -1 ], which is extremely small. Therefore, dry-up of the capacitor element 3 is prevented, so that the life of the electrolytic capacitor 40 can be extended.
【００３６】ここで、硬度の高い樹脂板４１を弾性封口
体２の下端面２ｃに貼ってあるため、横絞り部６ａから
の押圧力のみでは、その押圧力が弾性封口体２に対して
均一に加わりにくく、リード引出し孔２ａ、２ｂ内にお
ける気密を完全に確保できないと懸念されるが、本例で
は、アルミニウム部４ａ、５ａを透孔４１ａ、４１ｂに
対して圧入したため、アルミニウム部４ａ、５ａの外周
面が透孔４１ａ、４１ｂの内周面に圧接し、そこで気密
が十分に確保されている。従って、ポリビニルアルコー
ル製の樹脂板４１を弾性封口体２に貼り合わせたにもか
からわず、横絞り部６ａからの押圧力のみによって気密
を確保しようとした従来の電解コンデンサ（図６に示し
た電解コンデンサ）と相違して、弾性封口体２が薄い場
合でも、リード引出し孔２ａ、２ｂに対する気密が完全
で、そこからの液漏れが発生しない。Here, since the resin plate 41 having high hardness is stuck on the lower end surface 2c of the elastic sealing member 2, the pressing force from the horizontal drawing portion 6a is uniform with respect to the elastic sealing member 2. It is feared that the aluminum portions 4a, 5a are press-fitted into the through holes 41a, 41b, so that the aluminum portions 4a, 5a are press-fitted into the through holes 41a, 41b. Is pressed against the inner peripheral surfaces of the through holes 41a and 41b, where airtightness is sufficiently ensured. Therefore, despite the fact that the resin plate 41 made of polyvinyl alcohol is bonded to the elastic sealing body 2, a conventional electrolytic capacitor (see FIG. 6) that attempts to ensure airtightness only by the pressing force from the horizontal drawing portion 6a. Unlike the electrolytic capacitor, even when the elastic sealing body 2 is thin, the airtightness of the lead extraction holes 2a and 2b is perfect, and no liquid leaks therefrom.
【００３７】しかも、樹脂板４１は、弾性封口体２と一
体になって複合封口体４０ａになっているため、部品点
数が増えることもないので、信頼性の高い電解コンデン
サ４０を安価に製造できる。In addition, since the resin plate 41 is integrated with the elastic sealing member 2 to form the composite sealing member 40a, the number of components does not increase, and the highly reliable electrolytic capacitor 40 can be manufactured at low cost. .
【００３８】〔参考例３〕 図５（ａ）は、参考例３に係る電解コンデンサの縦断面
図、図５（ｂ）は、それに用いた弾性封口体の斜視図で
あり、このような形態の樹脂板に本発明を適用してもよ
い。本例の電解コンデンサは、参考例２に係る電解コン
デンサの改良例に相当する。[0038] Reference Example 3 FIG. 5 (a), longitudinal sectional view of the electrolytic capacitor according to the reference example 3, FIG. 5 (b), <br/> Oh Ri perspective view of an elastic sealing body used therewith However, the present invention may be applied to a resin plate having such a form.
No. The electrolytic capacitor of this example corresponds to an improved example of the electrolytic capacitor according to Reference Example 2 .
【００３９】すなわち、本例の電解コンデンサ５０も、
弾性封口体２の下端面２ｃと、コンデンサ素子３の上端
面３ａとの間にフッ素樹脂製（４−フッ化エチレン樹脂
製）の厚さが約１０μｍの樹脂板５１を有し、この樹脂
板５１は、弾性封口体２の下端面２ｃに貼り合わされ
て、弾性封口体２と一体の複合封口体５０ａを構成して
いる。That is, the electrolytic capacitor 50 of the present embodiment also
A resin plate 51 made of fluororesin (made of 4-fluorinated ethylene resin) having a thickness of about 10 μm is provided between a lower end surface 2c of the elastic sealing body 2 and an upper end surface 3a of the capacitor element 3. Reference numeral 51 is attached to the lower end surface 2c of the elastic sealing body 2 to form a composite sealing body 50a integral with the elastic sealing body 2.
【００４０】樹脂板５１にも、弾性封口体２のリード引
出し孔２ａ、２ｂに連通する位置に、リード線４、５の
アルミニウム部４ａ、５ａの外径に比して小さな内径の
透孔４１ａ、４１ｂが形成されていると共に、絶縁板５
１の背面側には、透孔４１ａ、４１ｂの周縁から延びる
管部５１ａ、５１ｂが形成され、管部５１ａ、５１ｂ
は、リード引出し孔２ａ、２ｂの内部にある。この管部
５１ａ、５１ｂの内径は、透孔４１ａ、４１ｂの内径と
同様に、アルミニウム部４ａ、５ａの外径に比して小さ
く設定してあり、本例では、透孔４１ａ、４１ｂおよび
管部５１ａ、５１ｂの内径は、リード線４、５のアルミ
ニウム部４ａ、５ｂの外径に対して約０．６０倍から約
０．９５倍に設定してある。The resin plate 51 is also provided with a through hole 41a having an inner diameter smaller than the outer diameter of the aluminum portion 4a, 5a of the lead wire 4, 5 at a position communicating with the lead outlet holes 2a, 2b of the elastic sealing body 2. , 41b and the insulating plate 5
1 are formed on the back side thereof with tube portions 51a, 51b extending from the periphery of the through holes 41a, 41b.
Are inside the lead extraction holes 2a and 2b. The inner diameters of the tube portions 51a and 51b are set smaller than the outer diameters of the aluminum portions 4a and 5a, like the inner diameters of the through holes 41a and 41b. In this example, the through holes 41a and 41b and the tube The inner diameter of the portions 51a and 51b is set to be about 0.60 to about 0.95 times the outer diameter of the aluminum portions 4a and 5b of the lead wires 4 and 5.
【００４１】ここで、樹脂板５１と弾性封口体２とを貼
り合わせて、複合封口体５０ａを製作するにあたって、
樹脂板５１の端面５１ｃと、弾性封口体２の下端面２ｃ
とを接着すると共に、管部５１ａ、５１ｂの外周面もリ
ード引出し孔２ａ、２ｂの内周面に接着してもよいが、
本例では、複合封口体５０ａの製造工程を簡略化して、
その生産コストを低減する目的に、樹脂板５１の端面５
１ｃのみが弾性封口体２の下端面２ｃに接着され、弾性
管部５１ａ、５１ｂの外周面は、リード引出し孔２ａ、
２ｂの内周面に接着されてない。Here, when the resin plate 51 and the elastic sealing body 2 are bonded together to produce the composite sealing body 50a,
The end face 51c of the resin plate 51 and the lower end face 2c of the elastic sealing body 2
And the outer peripheral surfaces of the tube portions 51a and 51b may also be bonded to the inner peripheral surfaces of the lead extraction holes 2a and 2b.
In this example, the manufacturing process of the composite sealing body 50a is simplified,
In order to reduce the production cost, the end face 5
1c is adhered to the lower end surface 2c of the elastic sealing body 2, and the outer peripheral surfaces of the elastic pipe portions 51a, 51b are connected to the lead extraction holes 2a,
2b is not adhered to the inner peripheral surface.
【００４２】このように構成した電解コンデンサ５０に
おいては、樹脂板５１がフッ素樹脂製であるため、弾性
封口体２に比して可撓性が低く、横絞り部６ａ、６ｂか
らの押圧力のみでは、管部５１ａ、５１ｂの外周面と、
リード引出し孔２ａ、２ｂの内周面とを密着させること
ができても、管部５１ａ、５１ｂの内周面と、リード線
４、５のアルミニウム部４ａ、５ａの外周面とを完全に
密着させることができない。In the electrolytic capacitor 50 configured as described above, since the resin plate 51 is made of a fluororesin, the flexibility is lower than that of the elastic sealing body 2 and only the pressing force from the horizontal drawing portions 6a and 6b is applied. Then, the outer peripheral surfaces of the pipe portions 51a and 51b,
Even if the inner peripheral surfaces of the lead extraction holes 2a and 2b can be brought into close contact with each other, the inner peripheral surfaces of the tube portions 51a and 51b and the outer peripheral surfaces of the aluminum portions 4a and 5a of the lead wires 4 and 5 are completely adhered. I can't let it.
【００４３】そこで、本例では、透孔４１ａ、４１ｂお
よび管部５１ａ、５１ｂの内径をアルミニウム部４ａ、
５ａの外径よりも小さく設定し、これらの透孔４１ａ、
４１ｂおよび管部５１ａ、５１ｂの内部にアルミニウム
部４ａ、５ａを圧入することによって、アルミニウム部
４ａ、５ａの外周面を透孔４１ａ、４１ｂおよび管部５
１ａ、５１ｂの内周面に圧接してある。Therefore, in this embodiment, the inner diameters of the through holes 41a and 41b and the pipe portions 51a and 51b are set to the aluminum portions 4a and 4a.
5a is set smaller than the outer diameter of the through holes 41a,
By press-fitting the aluminum portions 4a, 5a into the inside of the tube portions 41b, 51a, 51b, the outer peripheral surfaces of the aluminum portions 4a, 5a are made to pass through the through holes 41a, 41b and the tube portion 5a.
They are pressed against the inner peripheral surfaces of 1a and 51b.
【００４４】従って、本例の電解コンデンサ５０におい
ては、可撓性の小さな管部５１ａ、５１ｂをリード引出
し孔２ａ、２ｂに配置しても、リード引出し孔２ａ、２
ｂに対する気密が完全に保持される。それ故、弾性封口
体２の下端面２ｃは、樹脂板５１で覆われているため、
弾性封口体２からの電解液の透過が抑制されているな
ど、実施例４に係る電解コンデンサと同様な効果を奏す
るのに加えて、リード引出し孔２ａ、２ｂ内部における
気密性も高い。しかも、リード引出し孔２ａ、２ｂの内
周面は、電解液に接触することがないので、劣化せず、
液漏れなどの不具合も発生しない。Therefore, in the electrolytic capacitor 50 of this embodiment, even if the small flexible tube portions 51a and 51b are arranged in the lead extraction holes 2a and 2b, the lead extraction holes 2a and
The airtightness for b is completely maintained. Therefore, since the lower end surface 2c of the elastic sealing body 2 is covered with the resin plate 51,
In addition to the effects similar to those of the electrolytic capacitor according to the fourth embodiment, such as suppression of the permeation of the electrolytic solution from the elastic sealing body 2, the airtightness inside the lead extraction holes 2a, 2b is high. Moreover, since the inner peripheral surfaces of the lead extraction holes 2a and 2b do not come into contact with the electrolytic solution, they do not deteriorate,
No problems such as liquid leakage occur.
【００４５】〔その他の実施例〕 上記の実施例１、２、および参考例１、２、３において
は、樹脂板として、ポリビニルアルコール製またはフッ
素樹脂製のものを用いたが、その他にも、シリコン樹
脂、ポリ酢酸ビニル−ポリビニルアルコールの共重合
体、ポリアミド、ポリピロールなどの樹脂を用いること
ができる。とりわけ、ガス透過性が低い樹脂を選択する
場合には、たとえば、ポリビニルアルコール、またはそ
の共重合体、ポリアミド、ポリピロールなどのように、
酸素のガス透過係数が１．０×１０ -10 ［ｃｍ -3 （ＳＴ
Ｐ）ｃｍ -1 ｓ -1 ｃｍＨｇ -1 ］以下のものを採用する。ま
た、化学的安定性が高い樹脂を選択する場合には、フッ
素樹脂を採用する。この場合には、４−フッ化エチレン
樹脂に限らず、４−フッ化エチレン−６−フッ化プロピ
レン共重合体、４−フッ化エチレン−パーフルオロアル
コキシエチレン共重合体、４−フッ化エチレン−エチレ
ン共重合体、フッ化ビニリデンなども用いることができ
る。[Other Examples] In Examples 1 and 2 and Reference Examples 1 , 2 and 3 , the resin plate was made of polyvinyl alcohol or fluororesin. Resins such as a silicone resin, a polyvinyl acetate-polyvinyl alcohol copolymer, polyamide, and polypyrrole can be used. In particular, when selecting a resin having a low gas permeability, for example, polyvinyl alcohol, or a copolymer thereof, polyamide, polypyrrole, and the like,
The gas permeability coefficient of oxygen is 1.0 × 10 −10 [cm −3 (ST
P) cm -1 s -1 cmHg -1 ] or less. When a resin having high chemical stability is selected, a fluororesin is used. In this case, not only 4-fluoroethylene resin, but also 4-fluoroethylene-6-fluoropropylene copolymer, 4-fluoroethylene-perfluoroalkoxyethylene copolymer, 4-fluoroethylene- Ethylene copolymer, vinylidene fluoride and the like can also be used.
【００４６】また、樹脂板の厚さは、約１〜２００μｍ
のものを利用でき、そのうち、約１０〜１００μｍ程度
のものが気密性の面および扱いやすさの面で好ましい。The thickness of the resin plate is about 1 to 200 μm.
Among them, those having a thickness of about 10 to 100 μm are preferable in terms of airtightness and ease of handling.
【００４７】[0047]
【発明の効果】以上のとおり、本発明に係る電解コンデ
ンサにおいては、コンデンサ素子と弾性封口体との間
に、弾性封口体の端面を覆う樹脂板を配置したことに特
徴を有する。従って、本発明によれば、弾性封口体から
の電解液の透過を樹脂板で抑制することができるので、
電解コンデンサを長寿命化できる。As described above, the electrolytic capacitor according to the present invention is characterized in that the resin plate for covering the end face of the elastic sealing member is disposed between the capacitor element and the elastic sealing member. Therefore, according to the present invention, since the permeation of the electrolyte from the elastic sealing body can be suppressed by the resin plate,
The life of the electrolytic capacitor can be extended.
【００４８】また、本発明では、樹脂板にコンデンサ素
子の側面を覆う側面部を形成したため、コンデンサ素子
の側面部からの電解液の蒸発も抑制しているので、コン
デンサ素子のドライアップをより確実に防止できる。 Also, in the present invention, the capacitor element is provided on the resin plate.
Since the side part that covers the side of the element is formed, the capacitor element
The evaporation of the electrolyte from the side of the battery is also suppressed.
Dry-up of the element can be more reliably prevented.
【図１】（ａ）は、本発明の参考例１に係る電解コンデ
ンサの構成を示す縦断面図、（ｂ）は、その弾性封口体
および樹脂板の構成を示す斜視図である。FIG. 1A is a longitudinal sectional view showing a configuration of an electrolytic capacitor according to Embodiment 1 of the present invention, and FIG. 1B is a perspective view showing a configuration of an elastic sealing body and a resin plate.
【図２】（ａ）は、本発明の実施例１に係る電解コンデ
ンサの構成を示す縦断面図、（ｂ）は、その弾性封口体
および樹脂板の構成を示す斜視図である。FIG. 2A is a longitudinal sectional view showing a configuration of an electrolytic capacitor according to a first embodiment of the present invention, and FIG. 2B is a perspective view showing a configuration of an elastic sealing body and a resin plate.
【図３】（ａ）は、本発明の実施例２に係る電解コンデ
ンサの構成を示す縦断面図、（ｂ）は、その弾性封口体
および樹脂板の構成を示す斜視図である。FIG. 3A is a longitudinal sectional view illustrating a configuration of an electrolytic capacitor according to a second embodiment of the present invention, and FIG. 3B is a perspective view illustrating a configuration of an elastic sealing body and a resin plate.
【図４】（ａ）は、本発明の参考例２に係る電解コンデ
ンサの構成を示す縦断面図、（ｂ）は、その弾性封口体
と樹脂板との複合封口体の構成を示す断面図である。FIG. 4A is a vertical cross-sectional view showing a configuration of an electrolytic capacitor according to a second embodiment of the present invention, and FIG. 4B is a cross-sectional view showing a configuration of a composite sealing body of the elastic sealing body and a resin plate. It is.
【図５】（ａ）は、本発明の参考例３に係る電解コンデ
ンサの構成を示す縦断面図、（ｂ）は、その弾性封口体
と樹脂板との複合封口体の構成を示す断面図である。5A is a longitudinal sectional view showing a configuration of an electrolytic capacitor according to a third embodiment of the present invention, and FIG. 5B is a sectional view showing a configuration of a composite sealing body of the elastic sealing body and a resin plate. It is.
【図６】従来の電解コンデンサの構成を示す縦断面図で
ある。FIG. 6 is a longitudinal sectional view showing a configuration of a conventional electrolytic capacitor.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 小松 昭彦 長野県伊那市大字伊那165番地 ルビコ ン株式会社伊那工場内 審査官 竹井 文雄 (56)参考文献 特開 昭61−139019（ＪＰ，Ａ) 特開 昭58−151013（ＪＰ，Ａ) 実公 昭43−23017（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.7，ＤＢ名) H01G 9/10 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiko Komatsu Ina-shi, Nagano Prefecture, Ina-shi, 165 Ina, Rubicon Corporation Ina Plant Inspector Fumio Takei (56) References JP-A-61-139019 (JP, A) 58-151013 (JP, A) Jikken 43-23017 (JP, Y1) (58) Fields investigated (Int. Cl. 7 , DB name) H01G 9/10
Claims (7)
ード線がリード引出し孔に挿通した弾性封口体をコンデ
ンサケースの開放端側でコンデンサケースに対する横絞
り部および上絞り部によって固定したアルミニウム電解
コンデンサにおいて、前記コンデンサ素子と前記弾性封
口体との間には、双方の端面に接する樹脂板を有し、か
つ、当該樹脂板は、前記コンデンサ素子の側面を覆う側
面部を有することを特徴とするアルミニウム電解コンデ
ンサ。1. An aluminum electrolytic capacitor in which an elastic sealing body in which a lead wire of a capacitor element impregnated with an electrolyte is inserted into a lead draw-out hole is fixed at an open end side of the capacitor case by a lateral drawing portion and an upper drawing portion with respect to the capacitor case. In the above, the capacitor element and the elastic sealing
Between the mouth and the mouth, there is a resin plate in contact with both end faces,
One side of the resin plate covers a side surface of the capacitor element.
An aluminum electrolytic capacitor having a surface portion .
弾性封口体と別体であることを特徴とするアルミニウム
電解コンデンサ。2. The method according to claim 1, wherein the resin plate is
An aluminum electrolytic capacitor which is separate from an elastic sealing body .
弾性封口体と貼り合わされていることを特徴とするアル
ミニウム電解コンデンサ。3. The method according to claim 1, wherein the resin plate is
An aluminum electrolytic capacitor which is bonded to an elastic sealing body .
前記樹脂板は、前記透孔周縁から前記リード引出し孔内
に延びる管部を有することを特徴とするアルミニウム電
解コンデンサ。4. The method according to claim 1, wherein
The resin plate is provided in the lead extraction hole from the periphery of the through hole.
An aluminum electrolytic capacitor, characterized by having a tube portion extending to the aluminum electrolytic capacitor.
前記樹脂板は、酸素ガスの透過係数が１．０×１０ -10
［ｃｍ -3 （ＳＴＰ）ｃｍ -1 ｓ -1 ｃｍＨｇ -1 ］以下の樹脂
からなることを特徴とするアルミニウム電解コンデン
サ。5. The method according to claim 1, wherein
The resin plate has an oxygen gas transmission coefficient of 1.0 × 10 −10.
[Cm -3 (STP) cm -1 s -1 cmHg -1 ] or less resin
Aluminum electrolytic capacitor, characterized in that it consists.
前記樹脂板は、ポリビニルアルコール、ポリビニルアル
コールの共重合体、ポリアミドおよびポリピロールのう
ちのいずれかの樹脂からなることを特徴とするアルミニ
ウム電解コンデンサ。6. The method according to claim 1, wherein
The resin plate is made of polyvinyl alcohol, polyvinyl alcohol,
Coal copolymer, polyamide and polypyrrole
An aluminum electrolytic capacitor comprising any one of the above resins .
前記樹脂板は、フッ素樹脂からなることを特徴とするア
ルミニウム電解コンデンサ。7. The method according to claim 1, wherein
An aluminum electrolytic capacitor , wherein the resin plate is made of a fluororesin .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22831793A JP3333284B2 (en) | 1993-08-20 | 1993-08-20 | Aluminum electrolytic capacitors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22831793A JP3333284B2 (en) | 1993-08-20 | 1993-08-20 | Aluminum electrolytic capacitors |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002136446A Division JP2003017372A (en) | 2002-05-13 | 2002-05-13 | Aluminum electrolytic capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0766085A JPH0766085A (en) | 1995-03-10 |
| JP3333284B2 true JP3333284B2 (en) | 2002-10-15 |
Family
ID=16874555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22831793A Expired - Fee Related JP3333284B2 (en) | 1993-08-20 | 1993-08-20 | Aluminum electrolytic capacitors |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3333284B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000030987A (en) * | 1998-07-15 | 2000-01-28 | Nichicon Corp | Polarizable aluminum electrolytic capacitor |
| JP4947296B2 (en) * | 2007-03-30 | 2012-06-06 | 日本ケミコン株式会社 | Electrolytic capacitor sealing body and electrolytic capacitor using the sealing body |
-
1993
- 1993-08-20 JP JP22831793A patent/JP3333284B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0766085A (en) | 1995-03-10 |
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