JP3102776U - Surge absorbing element - Google Patents

Surge absorbing element Download PDF

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JP3102776U
JP3102776U JP2004000096U JP2004000096U JP3102776U JP 3102776 U JP3102776 U JP 3102776U JP 2004000096 U JP2004000096 U JP 2004000096U JP 2004000096 U JP2004000096 U JP 2004000096U JP 3102776 U JP3102776 U JP 3102776U
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outer tube
absorbing element
surge absorbing
heat
cover body
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善一 近藤
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Kondo Electric Co Ltd
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Kondo Electric Co Ltd
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Abstract

【課題】作動時に、破壊・飛散して起こる他所への二次的損傷を防止すると共に、これを簡易な構造でかつ低コストで実現したサージ吸収素子を提供する。
【解決手段】ガラス材や樹脂材等の熱脆性材からなる外装管11内の放電空間に対向させた端子電極13間にスパークギャップ15を形成してなるサージ吸収素子において、外装管11の全体を含むように耐熱弾性材からなるカバー体2で被覆して構成する。
また、外装管の全体を、耐熱弾性及び熱収縮性を有するカバー体で覆うと共に、加熱収縮させて外装管の全体に密着させる。さらに、カバー体は、樹脂性チューブ状とする。加えて、カバー体の外装管への覆いにおいて、外装管の両端から露出したリード線16の所定長さを覆うようにする。
【選択図】 図1
Provided is a surge absorbing element which prevents secondary damage to other places caused by destruction and scattering during operation and realizes this with a simple structure and at low cost.
In a surge absorbing element in which a spark gap is formed between terminal electrodes facing a discharge space in an outer tube made of a heat-brittle material such as a glass material or a resin material, an entire outer tube is provided. And covered with a cover 2 made of a heat-resistant elastic material.
In addition, the entire outer tube is covered with a cover body having heat resistance elasticity and heat shrinkage, and is heated and shrunk so as to adhere to the entire outer tube. Further, the cover body has a resin tube shape. In addition, when covering the outer tube with the cover body, a predetermined length of the lead wire 16 exposed from both ends of the outer tube is covered.
[Selection diagram] Fig. 1

Description

本願考案は、外装管封入型素子において、外装管内に配置した電極間のスパークギャップに放電電流を流し、過電流又は過電圧の異常エネルギーを吸収するサージ吸収素子に関し、特に、外装管がガラス管や樹脂管などの熱脆性材から成るサージ吸収素子に関する。   The invention of the present application relates to a surge absorbing element in which a discharge current flows in a spark gap between electrodes arranged in an outer tube, and a surge absorbing element that absorbs an abnormal energy of an overcurrent or an overvoltage in an outer tube enclosing element. The present invention relates to a surge absorbing element made of a thermo-brittle material such as a resin tube.

通信機器等の電子機器には、通常、ショートや落雷等の突発的に生じる異常エネルギーを吸収して他回路への致命的な損傷を阻止する保護部品としてサージ吸収素子(サージアブソーバーとも言われている。)がその回路内に組み込まれている。   Electronic devices such as communication devices usually have a surge absorbing element (also referred to as a surge absorber) as a protection component that absorbs suddenly generated abnormal energy such as a short circuit or lightning to prevent fatal damage to other circuits. Is built into the circuit.

このサージ吸収素子は、セラミック等からなる絶縁基板の上面に、一対の電極を狭小な間隙(通称、「スパークギャップ」又は「マイクロギャップ」)をもって対向配置し、これをガラス管等の外装管に収納して構成している。この様な構成が、コスト面や製造容易性の観点から主流となっている。   In this surge absorption element, a pair of electrodes are arranged on the upper surface of an insulating substrate made of ceramic or the like with a small gap (commonly called “spark gap” or “micro gap”), and this is used for an outer tube such as a glass tube. It is stored and configured. Such a configuration has become mainstream from the viewpoint of cost and ease of manufacturing.

外装管がガラス管である場合は、異常エネルギー、多くは高電圧が印加してサージ吸収素子が作動したときには、放電空間内の高温と熱膨脹により外装管は原形を留めることなく破壊されることがある。この現象自体は、サージ吸収素子の本来の機能を満足させるものであり、本素子を付帯させた電子機器の致命的な損傷を回避したこととなり好ましいことと言える。   When the outer tube is a glass tube, when the extraordinary energy, mostly high voltage is applied and the surge absorbing element is activated, the outer tube may be destroyed without retaining its original shape due to the high temperature and thermal expansion in the discharge space. is there. This phenomenon itself satisfies the original function of the surge absorbing element, and it can be said that it is preferable because fatal damage to the electronic device to which the present element is attached has been avoided.

しかしながら、上記破壊がガラス管の亀裂や割れ程度に止まる場合は良いが、時には急激な熱膨脹によりガラス管の破片やガラス管内に収納している各種部材が飛散した場合には、その飛散片が付近の回路に付着して短絡させたり、回路実装部品を損傷させたりする二次的損傷が発生し、電子機器の致命的な損傷を回避するという、サージ吸収素子の本来の目的に反する結果が懸念されていた。   However, it is good if the above-mentioned breakage is limited to the degree of cracking or cracking of the glass tube, but sometimes when the glass tube fragments or various members housed in the glass tube are scattered due to rapid thermal expansion, the scattered fragments are nearby. There is a concern that the surge absorbing element may defeat the original purpose of avoiding catastrophic damage to electronic equipment by causing secondary damage that adheres to short circuits and damages circuit mounted parts. It had been.

ところで、上記の懸念の配慮から、外装管の形成において、電極の間隙を熱硬化性ラバーや合成樹脂等を乾燥硬化させた過渡電圧保護材で覆い、これをさらにエポキシ樹脂等で覆うようにして高耐破損性を持たせているものがある(例えば、特許文献1参照。)。
特開2003−297606号公報(第3−5頁、第1図)
By the way, in consideration of the above concerns, in forming the outer tube, the gap between the electrodes is covered with a transient voltage protection material obtained by drying and curing a thermosetting rubber or a synthetic resin, and this is further covered with an epoxy resin or the like. Some have high breakage resistance (for example, see Patent Document 1).
JP 2003-297606 A (Page 3-5, FIG. 1)

本願考案は、サージ吸収素子の作動時に、破壊・飛散して起こる他所への二次的損傷を防止すると共に、これを簡易な構造でかつ低コストで実現することを目的としたサージ吸収素子を提供するものである。   The present invention proposes a surge absorbing element that aims to prevent secondary damage to other places caused by destruction and scattering when operating the surge absorbing element, and to realize this with a simple structure and at low cost. To provide.

上記の課題を解決するために、本願考案にかかるサージ吸収素子は以下のように構成している。   In order to solve the above problems, a surge absorbing element according to the present invention is configured as follows.

すなわち、熱脆性材からなる外装管(11)内の放電空間に対向させた端子電極(13)間にスパークギャップ(15)を形成してなるサージ吸収素子において、少なくとも外装管(11)の全体を含むように耐熱弾性材からなるカバー体(2)で被覆して構成することを特徴としている。   That is, in the surge absorbing element in which the spark gap (15) is formed between the terminal electrodes (13) facing the discharge space in the outer tube (11) made of a thermo-brittle material, at least the entire outer tube (11) And is covered with a cover body (2) made of a heat-resistant elastic material.

なお、この熱脆性材とは、ガラスなどのように加熱に関係なく衝撃により破壊され易い材料はもちろん、常温では塑性であるが加熱により脆性となる樹脂材などを含むものであり、ガラスや樹脂材に限定することなく脆い材質を広く含むものである。   The thermo-brittle material includes not only a material such as glass which is easily broken by an impact regardless of heating, but also a resin material which is plastic at normal temperature but becomes brittle by heating, such as glass or resin. The material includes brittle materials widely without being limited to materials.

また、ガラス管、又は樹脂管、のいずれか又はこれらの組み合わせの熱脆性材からなる外装管(11)の全体を、耐熱弾性及び熱収縮性を有するカバー体(2)で覆うと共に、加熱収縮させて外装管(11)の全体に密着させて成ることを特徴としている。   Further, the entire outer tube (11) made of a heat-brittle material of a glass tube, a resin tube, or a combination thereof is covered with a cover body (2) having heat-resistant elasticity and heat shrinkage, and heat shrinkage is performed. Then, the outer tube (11) is brought into close contact with the entire outer tube (11).

さらに、カバー体(2)は、樹脂性チューブ状としたことを特徴としている。   Further, the cover (2) is characterized in that it is made of a resinous tube.

加えて、カバー体(2)の外装管(11)への覆いにおいて、外装管(11)の両端から露出したリード線(16)の所定長さを覆うようにしたことを特徴としている。   In addition, when covering the outer tube (11) with the cover body (2), a predetermined length of the lead wire (16) exposed from both ends of the outer tube (11) is covered.

なお、実用新案登録請求の範囲の書類及び上記の課題を解決するための手段の欄で記載した括弧付き符号は、発明の構成の理解を容易にするため参考として図面符号を付記したもので、この図面上の形態に限定するものでないことはもちろんである。   The reference numerals in parentheses described in the documents of the claims for utility model registration and in the section of the means for solving the above-mentioned problems are those with drawing reference numerals for reference to facilitate understanding of the structure of the invention. Of course, the present invention is not limited to the form on the drawing.

本願考案のサージ吸収素子は上記のように構成をしているため、以下の効果を奏する。   Since the surge absorbing element of the present invention is configured as described above, the following effects can be obtained.

すなわち、本願考案のサージ吸収素子は、既存構成のサージ吸収素子の構造及び製造工程を変更することなく、これに付加的にかつ簡便にその外装管にカバー体を装着させることが可能である。   That is, the surge absorbing element of the present invention allows the cover body to be attached to the outer tube easily and additionally without changing the structure and manufacturing process of the existing structure of the surge absorbing element.

また、サージ吸収素子が破壊されても、外装管や構成部材の破壊片の飛散を防ぐことができ、電子機器の回路基板への二次的損傷を防ぐことが可能となる。曳いては、破壊及び飛散による回路基板の清掃・修復作業のための時間及びコストも低減できる効果をも有する。   Further, even if the surge absorbing element is broken, it is possible to prevent the broken pieces of the outer tube and the constituent members from scattering, and to prevent secondary damage to the circuit board of the electronic device. Pulling also has the effect of reducing the time and cost for cleaning and repairing the circuit board due to destruction and scattering.

以下に、本願考案にかかるサージ吸収素子における実施の最良形態を、図面に基づき詳細に説明する。   Hereinafter, the best mode for carrying out the surge absorbing element according to the present invention will be described in detail with reference to the drawings.

図1は実施例のサージ吸収素子を示す一部切欠き斜視図であり、図2は実施例のサージ吸収素子の組立状態を示す斜視図である。   FIG. 1 is a partially cutaway perspective view showing a surge absorbing element of an embodiment, and FIG. 2 is a perspective view showing an assembled state of the surge absorbing element of the embodiment.

本実施例のサージ吸収素子1は既存のものであり、その構成としては、例えば、セラミック等の絶縁性材からなる基板12の両端側を導電性材からなる端子電極13により狭持し、該基板12の上面に複数個の放電電極14をエッチング又は印刷等の技術により配置してスパークギャップ15を形成している。また、両端側の端子電極13には外部に接続するためのリード線16を取り付けていると共に、これらの基板12の全体を熱脆性材であるガラス材から成る外装管11(以下、「ガラス管」と称する。)に収納している。そして、ガラス管11の内部は空気が排除されて真空状態にされるか、又はアルゴンガス、ネオンガス、六フッ化硫黄ガス等が封入されている。   The surge absorbing element 1 according to the present embodiment is an existing surge absorbing element. For example, both ends of a substrate 12 made of an insulating material such as ceramic are sandwiched between terminal electrodes 13 made of a conductive material. A plurality of discharge electrodes 14 are arranged on the upper surface of the substrate 12 by a technique such as etching or printing to form a spark gap 15. In addition, lead wires 16 for connection to the outside are attached to the terminal electrodes 13 on both ends, and the entirety of these substrates 12 is made of an exterior tube 11 (hereinafter, referred to as a “glass tube”) made of a glass material which is a thermo-brittle material. "). The inside of the glass tube 11 is evacuated to a vacuum state or filled with an argon gas, a neon gas, a sulfur hexafluoride gas, or the like.

サージ吸収素子1においては、この外装管11をセラミック等の熱耐性の高いもので構成しているタイプがあるが、加工容易性やコスト等を考慮されて外装管はガラス管11から構成しているのが一般的である。   In the surge absorbing element 1, there is a type in which the outer tube 11 is made of a material having high heat resistance such as ceramics, but the outer tube is made of a glass tube 11 in consideration of easiness of processing and cost. It is common to have

カバー体2は、サージ吸収素子1のガラス管11を密着するように被覆すると共に、両側に延設するリード線16をガラス管11の長さと同程度の長さに延長させて覆っている。   The cover body 2 covers the glass tube 11 of the surge absorbing element 1 so as to be in close contact with the cover body 2, and also covers the lead wires 16 extending on both sides so as to extend to a length approximately equal to the length of the glass tube 11.

カバー体2は、合成樹脂の熱収縮性のチューブ状材から形成しており、図2に示すように、サージ吸収素子1にカバー体2を覆い被せるように装着した後、適宜の温度の熱風を吹きかけるなどして、少なくともガラス管11の側面及び両端側の一部への密着状態を成すようにしている。このほか、カバー体2を装着したサージ吸収素子1を高温雰囲気下に置くようにしても良い。   The cover body 2 is formed from a heat-shrinkable tubular material of a synthetic resin. As shown in FIG. 2, the cover body 2 is mounted on the surge absorbing element 1 so as to cover the cover body 2, and then hot air of an appropriate temperature is applied. Is sprayed on the glass tube 11 so that the glass tube 11 is brought into close contact with at least a part of the side surface and both ends. In addition, the surge absorbing element 1 with the cover 2 attached may be placed in a high-temperature atmosphere.

なお、サージ吸収素子1が異常エネルギーの発熱により破壊されるために、カバー体2は高難燃性材で、かつ高塑性材であるのがより好ましい。   In addition, since the surge absorbing element 1 is destroyed by the heat generated by the abnormal energy, it is more preferable that the cover 2 is a highly flame-retardant material and a highly plastic material.

実施例のサージ吸収素子を示す一部切欠き斜視図である。It is a partially notched perspective view which shows the surge absorption element of an Example. 実施例のサージ吸収素子の組立状態を示す斜視図である。It is a perspective view showing the assembled state of the surge absorption element of an example.

符号の説明Explanation of reference numerals

1 サージ吸収素子
11 ガラス管(外装管)
12 基板
13 端子電極
14 放電電極
15 スパークギャップ
16 リード線
2 カバー体

1 Surge absorbing element 11 Glass tube (exterior tube)
DESCRIPTION OF SYMBOLS 12 Substrate 13 Terminal electrode 14 Discharge electrode 15 Spark gap 16 Lead wire 2 Cover

Claims (5)

熱脆性材からなる外装管(11)内の放電空間に対向させた端子電極(13)間にスパークギャップ(15)を形成してなるサージ吸収素子において、
少なくとも外装管(11)の全体を含むように耐熱弾性材からなるカバー体(2)で被覆してなることを特徴とするサージ吸収素子。
In a surge absorbing element in which a spark gap (15) is formed between terminal electrodes (13) facing a discharge space in an outer tube (11) made of a thermo-brittle material,
A surge absorbing element characterized by being covered with a cover body (2) made of a heat-resistant elastic material so as to include at least the entire outer tube (11).
熱脆性材からなる外装管(11)内の放電空間に対向させた端子電極(13)間にスパークギャップ(15)を形成してなるサージ吸収素子において、
外装管(11)の全体を、耐熱弾性及び熱収縮性を有するカバー体(2)で覆い、加熱収縮させて外装管(11)の全体に密着させて成ることを特徴とするサージ吸収素子。
In a surge absorbing element in which a spark gap (15) is formed between terminal electrodes (13) facing a discharge space in an outer tube (11) made of a thermo-brittle material,
A surge absorbing element characterized in that the entire outer tube (11) is covered with a cover body (2) having heat-resistant elasticity and heat shrinkage, and then heat-shrinked to adhere to the entire outer tube (11).
熱脆性材からなる外装管(11)を、ガラス管、又は樹脂管、のいずれか又はこれらの組み合わせとしたことを特徴とする請求項1、又は2記載のサージ吸収素子。 The surge absorbing element according to claim 1, wherein the outer tube made of a thermo-brittle material is a glass tube, a resin tube, or a combination thereof. カバー体(2)を、樹脂性チューブ状としたことを特徴とする請求項1、2、又は3記載のサージ吸収素子。 4. The surge absorbing element according to claim 1, wherein the cover (2) is formed of a resin tube. カバー体(2)の外装管(11)への覆いにおいて、外装管(11)の両端から露出したリード線(16)の所定長さを覆うようにしたことを特徴とする請求項1、2、3、又は4記載のサージ吸収素子。

The cover (2) covers the outer tube (11) so as to cover a predetermined length of a lead wire (16) exposed from both ends of the outer tube (11). 5. The surge absorbing element according to 3, 4 or 5.

JP2004000096U 2004-01-13 2004-01-13 Surge absorbing element Expired - Fee Related JP3102776U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019167026A (en) * 2018-03-26 2019-10-03 東海旅客鉄道株式会社 Abnormal voltage protection device of electric car track

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019167026A (en) * 2018-03-26 2019-10-03 東海旅客鉄道株式会社 Abnormal voltage protection device of electric car track
JP7097728B2 (en) 2018-03-26 2022-07-08 東海旅客鉄道株式会社 Abnormal voltage protection device for train tracks

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