JP2013037889A - Fuse - Google Patents

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JP2013037889A
JP2013037889A JP2011173019A JP2011173019A JP2013037889A JP 2013037889 A JP2013037889 A JP 2013037889A JP 2011173019 A JP2011173019 A JP 2011173019A JP 2011173019 A JP2011173019 A JP 2011173019A JP 2013037889 A JP2013037889 A JP 2013037889A
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electric wire
fuse
heat
low melting
melting point
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JP5764006B2 (en
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Asako Takahashi
朝子 高橋
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Yazaki Corp
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Yazaki Corp
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Priority to JP2011173019A priority Critical patent/JP5764006B2/en
Priority to CN201280037267.7A priority patent/CN103718266B/en
Priority to KR1020147004198A priority patent/KR101539726B1/en
Priority to BR112014002360A priority patent/BR112014002360A2/en
Priority to PCT/JP2012/004988 priority patent/WO2013021616A1/en
Publication of JP2013037889A publication Critical patent/JP2013037889A/en
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Publication of JP5764006B2 publication Critical patent/JP5764006B2/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/055—Fusible members
    • H01H85/08—Fusible members characterised by the shape or form of the fusible member
    • H01H85/10—Fusible members characterised by the shape or form of the fusible member with constriction for localised fusing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/47—Means for cooling

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  • Fuses (AREA)
  • Insulating Bodies (AREA)
  • Details Of Indoor Wiring (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an overcurrent fuse with low costs capable of realizing a desired fusion characteristic without using a low melting metal unlike a conventional one.SOLUTION: A fuse 1A comprises an electric wire 2, and LA terminals 11 caulked to both ends of the electric wire. The electric wire 2 is formed by converging plural conductive strands, and a heat spot part 3 with a smaller cross section area than the other portion is provided at a center portion. Heat dissipation members 4 using joint terminals are fixed to both side portions of the heat spot part 3.

Description

本発明は、過電流（定格値以上の電流）が通電されると溶断して通電を遮断するヒューズに関する。   The present invention relates to a fuse that blows off when an overcurrent (a current equal to or higher than a rated value) is energized and interrupts energization.

この種の従来例のヒューズとしては、特許文献１に開示されたものがある。このヒューズ５０は、図６に示すように、導電材のバスバー５１と低融点金属６０とから構成されている。バスバー５１は、銅製である。バスバー５１には、他の箇所よりも小断面積の幅狭部５２が設けられている。バスバー５１には、加締片部５３と一対の堰き止め部５４が一体に設けられている。低融点金属（例えば錫）６０は、加締片部５３によって幅狭部５２上を跨るように配置されている。低融点金属６０は、バスバー５１に加締めによって固定され、且つ、バスバー５１に溶着されている。一対の堰き止め部５４は、低融点金属６０の両外側に間隔を置いて配置されている。一対の堰き止め部５４は、溶融した低融点金属６０が広い範囲に流れるのを堰き止めるためのものである。   A conventional fuse of this type is disclosed in Patent Document 1. As shown in FIG. 6, the fuse 50 includes a bus bar 51 made of a conductive material and a low melting point metal 60. The bus bar 51 is made of copper. The bus bar 51 is provided with a narrow portion 52 having a smaller cross-sectional area than other portions. The bus bar 51 is integrally provided with a caulking piece portion 53 and a pair of damming portions 54. The low melting point metal (for example, tin) 60 is arranged so as to straddle the narrow portion 52 by the crimping piece portion 53. The low melting point metal 60 is fixed to the bus bar 51 by caulking and is welded to the bus bar 51. The pair of damming portions 54 are arranged at intervals on both outer sides of the low melting point metal 60. The pair of damming portions 54 are intended to dam the molten low melting point metal 60 from flowing in a wide range.

上記構成において、バスバー５１に過電流が通電されると、幅狭部５２が他の箇所よりもジュール発熱量が多く、低融点金属６０が溶融し、溶融した低融点金属６０がバスバー（銅）５１の中に拡散して銅の融点を低下させる。これにより、幅狭部５２が溶断する。   In the above configuration, when an overcurrent is applied to the bus bar 51, the narrow portion 52 has a greater amount of Joule heat generation than other portions, the low melting point metal 60 is melted, and the melted low melting point metal 60 is the bus bar (copper). It diffuses into 51 and lowers the melting point of copper. As a result, the narrow portion 52 is fused.

特開２０１０−９２７２７号公報JP 2010-92727 A

しかしながら、前記従来のヒューズ５０では、所望の溶断特性を実現するのにバスバー５１の他に低融点金属６０を使用するため、そのための材料費、加工費、設備費がかかる。又、低融点金属６０をバスバー５１に溶着するため、低融点金属６０を溶着するための設備が必要である。以上より、コストが高いという問題があった。   However, in the conventional fuse 50, the low melting point metal 60 is used in addition to the bus bar 51 in order to realize a desired fusing characteristic, so that material costs, processing costs, and equipment costs are required. Further, since the low melting point metal 60 is welded to the bus bar 51, equipment for welding the low melting point metal 60 is required. From the above, there was a problem of high cost.

そこで、本発明は、前記した課題を解決すべくなされたものであり、低コストなヒューズを提供することを目的とする。   Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to provide a low-cost fuse.

本発明は、電線より形成され、前記電線には他の箇所より小さな断面積のヒートスポット部が設けられ、前記電線には前記ヒートスポット部とは異なる箇所に放熱部材が固定されていることを特徴とするヒューズである。   The present invention is formed from an electric wire, the electric wire is provided with a heat spot portion having a smaller cross-sectional area than other portions, and the electric wire has a heat dissipation member fixed at a location different from the heat spot portion. It is a featured fuse.

前記ヒートスポット部は、前記電線の中央箇所に設けられ、前記放熱部材は、前記電線の前記ヒートスポット部の両側にそれぞれ固定されることが好ましい。   It is preferable that the heat spot portion is provided at a central portion of the electric wire, and the heat dissipation member is fixed to both sides of the heat spot portion of the electric wire.

前記放熱部材として端子が好ましい。前記放熱部材として端子と電線が好ましい。   A terminal is preferable as the heat dissipation member. A terminal and an electric wire are preferable as the heat dissipation member.

本発明によれば、所望の溶断特性を電線と低コストな放熱部材にて実現でき、従来例のように低融点金属を使用しない。従って、低融点金属の材料費、加工費、設備費が必要なく、低コストである。   According to the present invention, desired fusing characteristics can be realized with an electric wire and a low-cost heat radiating member, and a low melting point metal is not used as in the conventional example. Therefore, the material cost, processing cost, and equipment cost of the low melting point metal are not necessary, and the cost is low.

本発明の第１実施形態を示し、ヒューズの斜視図である。1 is a perspective view of a fuse according to a first embodiment of the present invention. 本発明の第１実施形態を示し、（ａ）はヒューズの平面図、（ｂ）はその正面図、（ｃ）はその側面図である。1 shows a first embodiment of the present invention, in which (a) is a plan view of a fuse, (b) is a front view thereof, and (c) is a side view thereof. 本発明の第１実施形態を示し、電線の中央箇所を圧延してヒートスポット部を作製した斜視図である。It is the perspective view which showed 1st Embodiment of this invention and rolled the center location of the electric wire, and produced the heat spot part. 本発明の第１実施形態を示し、溶断特性線図である。FIG. 3 is a fusing characteristic diagram showing the first embodiment of the present invention. 本発明の第２実施形態を示し、ヒューズの斜視図である。It is a perspective view of a fuse, showing a second embodiment of the present invention. 従来例のヒューズの斜視図である。It is a perspective view of the fuse of a prior art example.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（第１実施形態）
図１〜図４は、本発明の第１実施形態を示す。図１及び図２に示すように、ヒューズ１Ａは、電線２と、この電線２の両端に加締めによって固定された２つのＬＡ端子１１とを備えている。 (First embodiment)
1 to 4 show a first embodiment of the present invention. As shown in FIGS. 1 and 2, the fuse 1 </ b> A includes an electric wire 2 and two LA terminals 11 fixed to both ends of the electric wire 2 by caulking.

電線２は、例えば、複数の導電材の素線が撚られ集束された軟銅線である。電線２は、所定の長さに設定されている。電線２の中央箇所には、他の箇所より小さな断面積のヒートスポット部３が設けられている。ヒートスポット部３は、電線２の中央箇所を圧延することによって作製される。電線２のヒートスポット部３の両側箇所には、放熱部材４が固定されている。放熱部材４としてジョイント端子（端子）が使用されている。ジョイント端子は、熱伝導率の良い材料より形成されている。ジョイント端子の固定された箇所は、熱容量が大きく、且つ、表面積が広くなっている。   The electric wire 2 is, for example, an annealed copper wire in which strands of a plurality of conductive materials are twisted and converged. The electric wire 2 is set to a predetermined length. A heat spot portion 3 having a smaller cross-sectional area than other portions is provided at the central portion of the electric wire 2. The heat spot part 3 is produced by rolling the central part of the electric wire 2. A heat radiating member 4 is fixed to both sides of the heat spot portion 3 of the electric wire 2. A joint terminal (terminal) is used as the heat dissipating member 4. The joint terminal is made of a material having good thermal conductivity. A portion where the joint terminal is fixed has a large heat capacity and a large surface area.

次に、ヒューズ１Ａの製造方法を説明する。複数の導電材の素線が撚られた電線２を使用する。先ず、ボンダ装置を用いて、電線２の中央箇所を圧延して他の箇所より小さな断面積のヒートスポット部３を作製する（ヒートスポット作製工程）。   Next, a method for manufacturing the fuse 1A will be described. An electric wire 2 in which strands of a plurality of conductive materials are twisted is used. First, using the bonder device, the central portion of the electric wire 2 is rolled to produce the heat spot portion 3 having a smaller cross-sectional area than the other portions (heat spot production step).

次に、図３に示すように、電線２の両端部にＬＡ端子１１を加締めによって固定する。   Next, as shown in FIG. 3, the LA terminal 11 is fixed to both ends of the electric wire 2 by caulking.

次に、図１に示すように、電線２のヒートスポット部３の両側箇所に放熱部材４のジョイント端子を加締めによって固定する。これで、完了する。尚、両端部を除いた電線２の全外周を絶縁保護層（図示せず）で被覆しても良い。   Next, as shown in FIG. 1, the joint terminals of the heat radiating member 4 are fixed to the both side portions of the heat spot portion 3 of the electric wire 2 by caulking. This completes it. In addition, you may coat | cover the outer periphery of the electric wire 2 except both ends with an insulating protective layer (not shown).

このようにして製造されたヒューズ１Ａの溶断特性は、加工しない電線Ｗ１や、ヒートスポット部３を有さないが放熱部材４を有する電線Ｗ２と比較すると、次のようになる。電線２としては、加工しない状態でレアショート領域（２００％通電）での溶断特性が規格内で溶断するものを使用する。この加工無し電線Ｗ１の溶断特性線は、図４のＷ１特性線となる。ヒートスポット部３を有さず、放熱部材４のみを有する電線Ｗ２は、放熱部材４を固定した箇所において空気と電線２が接する表面積が大きいため、電線２の温度が上昇した場合の放熱が大きい。これにより、加工無しの電線Ｗ１と較べて、過電流の全通電領域で溶断時間が遅くなる。放熱部材４のみを有する電線Ｗ２の溶断特性線は、図４のＷ２特性線となる。これにより、デッドショート領域（６００％通電）以外では、溶断時間が規格の範囲内になるが、デッドショート領域（６００％通電）では、溶断時間が規格よりも遅くなる。   The fusing characteristics of the fuse 1A manufactured as described above are as follows when compared with the electric wire W1 that is not processed and the electric wire W2 that does not have the heat spot portion 3 but has the heat dissipation member 4. As the electric wire 2, an electric wire that has a fusing characteristic in a rare short region (200% energization) within a standard without being processed is used. The fusing characteristic line of the unprocessed electric wire W1 is the W1 characteristic line of FIG. The electric wire W2 having only the heat radiating member 4 without the heat spot portion 3 has a large surface area where the air and the electric wire 2 are in contact with each other at the position where the heat radiating member 4 is fixed. . Thereby, compared with the electric wire W1 without a process, fusing time becomes late | slow in the all energization area | region of an overcurrent. The fusing characteristic line of the electric wire W2 having only the heat radiating member 4 is the W2 characteristic line of FIG. As a result, the fusing time is within the standard range except for the dead short region (600% energization), but the fusing time is slower than the standard in the dead short region (600% energization).

本発明のヒューズ１Ａは、放熱部材４のみを有する電線Ｗ２と比較して、ヒートスポット部３での発熱量が多くなるため、特に発熱量が多くなるデッドショート領域（６００％通電）で溶断時間が早くなる。従って、本発明のヒューズ１Ａの溶断特性線は、図４の１Ａ特性線となる。これにより、デッドショート領域（６００％通電）での溶断時間が規格の範囲内となる。本発明のヒューズ１Ａは、低融点金属無しで溶断特性５水準の保護ができるものとなっている。   Since the fuse 1A of the present invention has a larger amount of heat generation at the heat spot portion 3 than the electric wire W2 having only the heat radiating member 4, the fusing time particularly in a dead short region (600% energization) where the amount of heat generation increases. Becomes faster. Therefore, the fusing characteristic line of the fuse 1A of the present invention is the 1A characteristic line of FIG. Thereby, the fusing time in the dead short region (600% energization) is within the standard range. The fuse 1A of the present invention is capable of protecting at a fusing characteristic of 5 levels without a low melting point metal.

以上説明したように、所望の溶断特性を電線２と、低融点金属に比べて低コストな放熱部材４を使用して実現でき、従来例のように低融点金属を使用しない。従って、低融点金属の材料費、加工費、設備費が必要なく、低コストである。   As described above, the desired fusing characteristics can be realized by using the electric wire 2 and the heat dissipating member 4 which is lower in cost than the low melting point metal, and does not use the low melting point metal as in the conventional example. Therefore, the material cost, processing cost, and equipment cost of the low melting point metal are not necessary, and the cost is low.

ヒートスポット部３は、電線２の中央に設けられ、放熱部材４は、電線２のヒートスポット部３の両側にそれぞれ設けられている。従って、ヒートスポット部３の両外側箇所は放熱によって温度上昇が抑制されるため、ヒートスポット部３で確実に溶断する。   The heat spot part 3 is provided in the center of the electric wire 2, and the heat radiating members 4 are provided on both sides of the heat spot part 3 of the electric wire 2. Therefore, since the temperature rise is suppressed by heat radiation at both outer portions of the heat spot portion 3, the heat spot portion 3 is surely fused.

放熱部材４は、ジョイント端子を使用している。ジョイント端子は、低コストで、入手容易な部材であり、且つ、電線２に容易に固定できる。   The heat radiating member 4 uses a joint terminal. The joint terminal is a low-cost and easily available member, and can be easily fixed to the electric wire 2.

（第２実施形態）
図５は、本発明の第２実施形態を示す。図５に示すように、この第２実施形態のヒューズ１Ｂは、前記実施形態のものと比較するに、放熱部材４Ａの構成が相違する。つまり、放熱部材４Ａとして、ジョイント端子（端子）４ａと電線４ｂが使用されている。電線４ｂの一端側は、電線２にジョイント端子４ａを加締め固定する際に共締めされることで固定されている。 (Second Embodiment)
FIG. 5 shows a second embodiment of the present invention. As shown in FIG. 5, the fuse 1 </ b> B of the second embodiment is different in configuration of the heat dissipating member 4 </ b> A from that of the above embodiment. That is, the joint terminal (terminal) 4a and the electric wire 4b are used as the heat radiating member 4A. One end side of the electric wire 4b is fixed by being fastened together when the joint terminal 4a is caulked and fixed to the electric wire 2.

他の構成は、前記第１実施形態と同じであるため、図面の同一構成箇所には同一符号を付して説明を省略する。   Since the other configuration is the same as that of the first embodiment, the same components in the drawings are denoted by the same reference numerals and description thereof is omitted.

この第２実施形態でも、前記第１実施形態と同様に、所望の溶断特性を電線２と放熱部材４Ａを使用して実現でき、従来例のように低融点金属を使用しない。従って、低融点金属の材料費、加工費、設備費が必要なく、低コストである。   In the second embodiment, similarly to the first embodiment, desired fusing characteristics can be realized by using the electric wire 2 and the heat radiating member 4A, and a low melting point metal is not used as in the conventional example. Therefore, the material cost, processing cost, and equipment cost of the low melting point metal are not necessary, and the cost is low.

この第２実施形態では、放熱部材４Ａは、ジョイント端子４ａと電線４ｂを使用しているので、ジョイント端子４ａと電線４ｂの表面からも放熱できるため、前記第１実施形態よりも、放熱性が良い。ジョイント端子４ａと電線４ｂは、低コストで、入手容易な部材であり、且つ、電線２に容易に固定できる部品組み合わせでもある。   In the second embodiment, since the heat radiating member 4A uses the joint terminal 4a and the electric wire 4b, heat can be radiated from the surfaces of the joint terminal 4a and the electric wire 4b. good. The joint terminal 4a and the electric wire 4b are low-cost, easily available members, and also a component combination that can be easily fixed to the electric wire 2.

１Ａ，１Ｂ ヒューズ
２ 電線
２ａ 素線
３ ヒートスポット部
４，４Ａ 放熱部材
４ａ ジョイント端子（端子）
４ｂ 電線 1A, 1B Fuse 2 Electric wire 2a Wire 3 Heat spot part 4, 4A Heat radiation member 4a Joint terminal (terminal)
4b electric wire

Claims (4)

電線より形成され、前記電線には他の箇所より小さな断面積のヒートスポット部が設けられ、前記電線には前記ヒートスポット部とは異なる箇所に放熱部材が固定されていることを特徴とするヒューズ。   A fuse formed of an electric wire, wherein the electric wire is provided with a heat spot portion having a smaller cross-sectional area than other portions, and a heat radiating member is fixed to the electric wire at a location different from the heat spot portion. . 請求項１記載のヒューズであって、
前記ヒートスポット部は、前記電線の中央箇所に設けられ、前記放熱部材は、前記電線の前記ヒートスポット部の両側にそれぞれ固定されたことを特徴とするヒューズ。 The fuse of claim 1,
The fuse, wherein the heat spot portion is provided at a central portion of the electric wire, and the heat radiating member is fixed to both sides of the heat spot portion of the electric wire. 請求項１又は請求項２記載のヒューズであって、
前記放熱部材は、端子であることを特徴とするヒューズ。 A fuse according to claim 1 or claim 2, wherein
The fuse, wherein the heat dissipating member is a terminal. 請求項１又は請求項２記載のヒューズであって、
前記放熱部材は、端子と電線であることを特徴とするヒューズ。 A fuse according to claim 1 or claim 2, wherein
The fuse, wherein the heat dissipating member is a terminal and an electric wire.
JP2011173019A 2011-08-08 2011-08-08 fuse Active JP5764006B2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2011173019A JP5764006B2 (en) 2011-08-08 2011-08-08 fuse
CN201280037267.7A CN103718266B (en) 2011-08-08 2012-08-06 Fuse
KR1020147004198A KR101539726B1 (en) 2011-08-08 2012-08-06 Fuse
BR112014002360A BR112014002360A2 (en) 2011-08-08 2012-08-06 fuse
PCT/JP2012/004988 WO2013021616A1 (en) 2011-08-08 2012-08-06 Fuse

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JP2011173019A JP5764006B2 (en) 2011-08-08 2011-08-08 fuse

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JP2013037889A true JP2013037889A (en) 2013-02-21
JP5764006B2 JP5764006B2 (en) 2015-08-12

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Publication number Priority date Publication date Assignee Title
JP2020035589A (en) * 2018-08-29 2020-03-05 株式会社オートネットワーク技術研究所 Overcurrent cutoff unit
WO2020045177A1 (en) * 2018-08-29 2020-03-05 株式会社オートネットワーク技術研究所 Overcurrent cutoff unit
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