JP6295060B2 - Fuse device - Google Patents

Fuse device Download PDF

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JP6295060B2
JP6295060B2 JP2013223263A JP2013223263A JP6295060B2 JP 6295060 B2 JP6295060 B2 JP 6295060B2 JP 2013223263 A JP2013223263 A JP 2013223263A JP 2013223263 A JP2013223263 A JP 2013223263A JP 6295060 B2 JP6295060 B2 JP 6295060B2
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edge
fusible
bent
shape
fusible body
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JP2015088235A (en
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岩田　匡司
匡司 岩田
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Yazaki Corp
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Yazaki Corp
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Priority to PCT/JP2014/074883 priority patent/WO2015064245A1/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
    • 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
    • H01H85/0013—Means for preventing damage, e.g. by ambient influences to the fuse
    • H01H85/0017—Means for preventing damage, e.g. by ambient influences to the fuse due to vibration or other mechanical forces, e.g. centrifugal forces
    • 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
    • H01H2085/0555—Input terminal connected to a plurality of output terminals, e.g. multielectrode

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  • Fuses (AREA)

Description

本発明は、ヒューズ装置に係り、たとえば、自動車のバッテリのところに設置されて使用されるものに関する。   The present invention relates to a fuse device, for example, a device installed and used in a battery of an automobile.

従来、図５で示すようなヒューズ装置３０１が知られている（たとえば、特許文献１参照）。   Conventionally, a fuse device 301 as shown in FIG. 5 is known (see, for example, Patent Document 1).

ヒューズ装置３０１は、銅合金の板材を打ち抜いて形成され、回路板３０３と、この回路板３０３を絶縁被覆する絶縁体ハウジング３０５とを備えており、主に車両搭載用であって、ヒューズボックスに収容して用いられるものである。   The fuse device 301 is formed by punching a copper alloy plate material. The fuse device 301 includes a circuit board 303 and an insulator housing 305 for insulatingly covering the circuit board 303. It is housed and used.

回路板３０３では、それぞれに個別溶断部３０７を介して複数の入出力端子３０９を備えたバッテリ側バスバー部３１１とオルタネータ側バスバー部３１３とを充電電流保護用溶断部３１５で連結している。   In the circuit board 303, the battery-side bus bar portion 311 and the alternator-side bus bar portion 313 each having a plurality of input / output terminals 309 are connected by the charging current protection fusing portion 315 via the individual fusing portions 307.

バッテリ側バスバー部３１１はバッテリ接続端子３１７を備えており、バッテリ（不図示）に接続され、かつ、オルタネータ側バスバー部３１３はオルタネータ接続端子３１９を備えて、オルタネータ（車両用発電機／不図示）に接続される。   The battery-side bus bar portion 311 includes a battery connection terminal 317 and is connected to a battery (not shown), and the alternator-side bus bar portion 313 includes an alternator connection terminal 319, and an alternator (vehicle generator / not shown). Connected to.

絶縁体ハウジング３０５には、複数の個別溶断部３０７と一箇所の充電電流保護用溶断部３１５とを収容する収容部３２１が設けられている。この収容部３２１には、隣接する個別溶断部３０７等間に隔壁３２３が設けられている。   The insulator housing 305 is provided with an accommodating portion 321 that accommodates a plurality of individual fusing portions 307 and one charging current protecting fusing portion 315. In the housing portion 321, a partition wall 323 is provided between adjacent individual fusing portions 307 and the like.

特開２００８−２２６７４３号公報JP 2008-226743 A

ところで、従来のヒューズ装置３０１では、溶断部３０７が図６で示すような形状に形成されているので、入出力端子３０９への相手側端子の挿入、入出力端子３０９からの相手側端子の離脱、また、振動により、溶断部３０７にモーメントが発生し、放熱部を兼ねている低融点金属保持部３２５の根元である不連続形状部３２７に過度な応力が発生し、溶断部３０７が破損しやすいという問題がある。   By the way, in the conventional fuse device 301, the fusing part 307 is formed in the shape as shown in FIG. 6, so that the mating terminal is inserted into the input / output terminal 309 and the mating terminal is detached from the input / output terminal 309. Further, due to vibration, a moment is generated in the fusing part 307, an excessive stress is generated in the discontinuous shape part 327 that is the base of the low melting point metal holding part 325 that also serves as a heat radiating part, and the fusing part 307 is damaged. There is a problem that it is easy.

上記モーメントの一例として、モーメントＮ＝Ｆ×ｒｃｏｓθを掲げることができる。なお、「Ｆ」は、オルタネータ側バスバー部３１３と入出力端子３０９との間のかかる力を示している。また、不連続形状部３２７に発生する過度な応力は、応力集中によって発生するものである。応力集中の指標となる応力集中係数αは、α＝σｍａｘ／σ０であらわされる。「σ０」は、応力集中が無いと仮定したときの不連続形状部３２７に発生する応力であり、「σｍａｘ」は、応力集中がある実際の不連続形状部３２７に発生する応力である。 As an example of the moment, the moment N = F × r cos θ can be listed. “F” indicates a force applied between the alternator-side bus bar portion 313 and the input / output terminal 309. Further, excessive stress generated in the discontinuous shape portion 327 is generated by stress concentration. The stress concentration coefficient α serving as an index of stress concentration is expressed as α = σ max / σ 0 . “Σ 0” is the stress generated in the discontinuous shape portion 327 when it is assumed that there is no stress concentration, and “σ max ” is the stress generated in the actual discontinuous shape portion 327 where the stress concentration is present. .

本発明は、上記問題点に鑑みてなされたものであり、外力や振動が加わったときであっても可溶体部が破断しにくいヒューズ装置を提供することを目的とする。   The present invention has been made in view of the above problems, and an object of the present invention is to provide a fuse device in which a fusible body portion is not easily broken even when an external force or vibration is applied.

請求項１に記載の発明は、可溶体部に発生する応力集中を軽減するために、前記可溶体部の縁の一部の形状が、連続的に滑らかに曲がっており、前記可溶体部は、長手方向の中間部の少なくとも２箇所で曲がっており、前記曲がっている各箇所の劣角側の縁が、連続的に滑らかに曲がっており、前記可溶体部は、所定の幅で所定の長さ延びている第１の部位と、所定の幅で所定の長さ延びている第２の部位と、所定の幅で所定の長さ延びている第３の部位とで、「Ｚ」字状に形成されており、前記第１の部位と前記第２の部位との境界の部位の幅方向の一方の縁である劣角側の縁のみが、円弧状になっており、前記第２の部位と前記第３の部位との境界の部位の幅方向の一方の縁である劣角側の縁のみが、円弧状になっており、前記第１の部位と前記第３の部位との間で延びている前記第２の部位の中央部には、低融点金属保持部が設けられているヒューズ装置である。 In the first aspect of the invention, in order to reduce the stress concentration generated in the fusible body part, the shape of a part of the edge of the fusible body part is bent continuously and smoothly, , Bent at at least two places in the middle part in the longitudinal direction, the edge on the minor angle side of each bent part is bent continuously and smoothly, and the fusible body part has a predetermined width and a predetermined width. A first part extending in length, a second part extending in a predetermined length with a predetermined width, and a third part extending in a predetermined length with a predetermined width, a “Z” character Only the edge on the minor angle side, which is one edge in the width direction of the boundary portion between the first portion and the second portion, has an arc shape, and the second portion Only the minor-angle side edge, which is one edge in the width direction of the boundary part between the part and the third part, has an arc shape, and the first part And wherein the third central portion of said second portion extending between the portion of a fuse device for low-melting metal holding portion.

本発明によれば、外力や振動が加わったときであっても可溶体部が破断しにくいヒューズ装置を提供することができるという効果を奏する。   According to the present invention, there is an effect that it is possible to provide a fuse device in which a fusible part is not easily broken even when an external force or vibration is applied.

本発明の実施形態に係るヒューズ装置を示す図である。It is a figure which shows the fuse apparatus which concerns on embodiment of this invention. 本発明の実施形態に係るヒューズ装置の可溶体部を示す図である。It is a figure which shows the soluble body part of the fuse apparatus which concerns on embodiment of this invention. （ａ）は図２におけるＩＩＩＡ部の拡大図であり、（ｂ）は図２におけるＩＩＩＢ部の拡大図である。(A) is the enlarged view of the IIIA part in FIG. 2, (b) is the enlarged view of the IIIB part in FIG. 可溶体部の変形例を示す図である。It is a figure which shows the modification of a soluble body part. 従来のヒューズ装置を示す図である。It is a figure which shows the conventional fuse apparatus. 従来のヒューズ装置の可溶体部を示す図である。It is a figure which shows the soluble body part of the conventional fuse apparatus.

本発明の実施形態に係るヒューズ装置１は、たとえば、従来のものと同様に、車輌に搭載されて使用されるものであり、可溶体部３を備えて構成されている。   The fuse device 1 according to the embodiment of the present invention is used by being mounted on a vehicle, for example, similarly to the conventional one, and includes a fusible part 3.

可溶体部３では、可溶体部３に加わった力によって可溶体部３に発生する応力集中を軽減するために、縁の少なくとも一部５の形状が、急激に曲がることなく連続的に滑らかに曲がっている。   In the fusible body part 3, in order to reduce the stress concentration generated in the fusible body part 3 due to the force applied to the fusible body part 3, the shape of at least a part 5 of the edge is continuously and smoothly bent without abrupt bending. bent.

ヒューズ装置１は、従来のものと同様にして、バスバー部（バッテリ側バスバー部、オルタネータ側バスバー部）７と、端子部９とを備えて構成されている。可溶体部３は、バスバー部７と端子部９とをお互いにつないでいる
そして、端子部９がバスバー部７に対して相対的に動いたとき（たとえば、端子部９がバスバー部７に対して接近もしくは離反する方向で動いたとき）、可溶体部３に加わるモーメントによって発生する可溶体部３での応力集中を軽減するために、可溶体部３の縁の一部５の形状が、急激に曲がることなく連続的に滑らかに曲がっている。 The fuse device 1 includes a bus bar portion (battery side bus bar portion, alternator side bus bar portion) 7 and a terminal portion 9 in the same manner as the conventional one. The fusible part 3 connects the bus bar part 7 and the terminal part 9 to each other. And, when the terminal part 9 moves relative to the bus bar part 7 (for example, the terminal part 9 is connected to the bus bar part 7). In order to reduce the stress concentration in the fusible part 3 caused by the moment applied to the fusible part 3, the shape of the part 5 of the edge of the fusible part 3 is It bends smoothly continuously without suddenly turning.

なお、可溶体部３の縁の一部５の形状が急激に曲がることなく連続的に滑らかに曲がっていることで、端子部９やバスバー部７や可溶体部３が振動しているときにおける可溶体部３での応力集中も軽減されるようになっている。   In addition, when the shape of the part 5 of the edge of the soluble body part 3 is bent smoothly smoothly without abruptly bending, the terminal part 9, the bus bar part 7, and the soluble body part 3 are vibrating. The stress concentration in the fusible part 3 is also reduced.

また、可溶体部３とバスバー部７と端子部９とを回路板１１とすると、回路板１１は、銅や銅合金等の導電性の板材を打ち抜くことで形成されている。さらに、ヒューズ装置１は、従来のものと同様にして、回路板１１の所定の箇所に絶縁体ハウジングが設けられている。   When the fusible part 3, the bus bar part 7, and the terminal part 9 are the circuit board 11, the circuit board 11 is formed by punching a conductive plate material such as copper or copper alloy. Further, the fuse device 1 is provided with an insulator housing at a predetermined position of the circuit board 11 in the same manner as the conventional one.

バスバー部７や端子部９や可溶体部３は、たとえば平板状に形成されている。可溶体部３は、所定の幅で長く延び、長手方向の中間部の少なくとも２箇所の角部１３（１３Ａ，１３Ｂ）で曲がっている。可溶体部３の長手方向の一端がバスバー部７につながっており、可溶体部３の長手方向の他端が端子部９につながっている。   The bus bar portion 7, the terminal portion 9, and the fusible body portion 3 are formed in a flat plate shape, for example. The fusible body portion 3 extends long with a predetermined width and is bent at at least two corners 13 (13A, 13B) in the middle portion in the longitudinal direction. One end of the fusible part 3 in the longitudinal direction is connected to the bus bar part 7, and the other end of the fusible part 3 in the longitudinal direction is connected to the terminal part 9.

そして、各角部１３にかかる曲げモーメントによって発生する各角部１３での応力集中を軽減するために、可溶体部３の曲がっている各箇所（各角部）１３の幅方向における劣角側の縁（幅方向の一方の側の縁）５が、急激に曲げることなく連続的に滑らかに曲がっている。   And in order to reduce the stress concentration at each corner 13 generated by the bending moment applied to each corner 13, the minor angle side in the width direction of each bent portion (each corner) 13 of the fusible body portion 3. The edge 5 (edge on one side in the width direction) 5 is continuously and smoothly bent without being bent sharply.

バスバー部７の厚さと端子部９の厚さとは、たとえば、お互いが等しくなっている。バスバー部７の厚さ方向と端子部９の厚さ方向と可溶体部３の厚さ方向とはお互いに一致している。バスバー部７と端子部９と可溶体部３とは、たとえば、これらの厚さ方向でお互いが同じところに位置している。   For example, the thickness of the bus bar portion 7 and the thickness of the terminal portion 9 are equal to each other. The thickness direction of the bus bar portion 7, the thickness direction of the terminal portion 9, and the thickness direction of the fusible body portion 3 coincide with each other. For example, the bus bar portion 7, the terminal portion 9, and the fusible body portion 3 are located at the same place in the thickness direction.

さらに説明すると、可溶体部３は、所定の幅で所定の長さ延びている第１の部位１５と、所定の幅で所定の長さ延びている第２の部位１７と、所定の幅で所定の長さ延びている第３の部位１９とで、「Ｚ」字状に形成されている。   More specifically, the fusible body portion 3 includes a first portion 15 extending a predetermined length at a predetermined width, a second portion 17 extending a predetermined length at a predetermined width, and a predetermined width. A third portion 19 extending for a predetermined length is formed in a “Z” shape.

第１の部位１５は「Ｚ」字の下の水平部位（図２では右側で上下方向に長く延びている部位）を形成している。第２の部位１７は、「Ｚ」字の斜めの部位（図２では中程の斜めに長く延びている部位）を形成している。第３の部位１９は、「Ｚ」字の上の水平部位（図２では左側で上下方向に長く延びている部位）を形成している。   The first portion 15 forms a horizontal portion below the “Z” character (a portion extending long in the vertical direction on the right side in FIG. 2). The second portion 17 forms a “Z” -shaped oblique portion (a portion extending long in the middle oblique direction in FIG. 2). The third portion 19 forms a horizontal portion above the “Z” character (a portion extending long in the vertical direction on the left side in FIG. 2).

第２の部位１７は、第１の部位１５の長手方向の一端（図２では下端）から、第１の部位１５から次第に離れ第１の部位１５の長手方向の他端（図２では上端）側に向かう斜め方向に延びている。第３の部位１９は、第２の部位１７の長手方向の第１の部位１５とは反対側の端（図２では上端）から第１の部位１５と平行に、第１の部位１５の長手方向の一端（図２では下端）側に延びている。   The second part 17 is gradually separated from the first part 15 from one end in the longitudinal direction of the first part 15 (lower end in FIG. 2), and the other end in the longitudinal direction of the first part 15 (upper end in FIG. 2). It extends in an oblique direction toward the side. The third portion 19 extends from the end opposite to the first portion 15 in the longitudinal direction of the second portion 17 (upper end in FIG. 2) in parallel with the first portion 15. It extends to one end (the lower end in FIG. 2) in the direction.

「Ｚ」字における第１の部位１５の右端（図２では上端）は、第２の部位１７や第３の部位１９よりも右側（図２では上側）に位置しており、バスバー部７につながっている。「Ｚ」字における第３の部位１９の左端（図２では下端）は、第１の部位１５や第２の部位１７よりも左側（図２では下側）に位置しており、端子部９につながっている。   The right end (upper end in FIG. 2) of the first portion 15 in the “Z” shape is located on the right side (upper side in FIG. 2) of the second portion 17 and the third portion 19. linked. The left end (lower end in FIG. 2) of the third part 19 in the “Z” shape is located on the left side (lower side in FIG. 2) of the first part 15 and the second part 17, and the terminal portion 9. Connected to.

可溶体部３では、第１の部位１５と第２の部位１７との境界の部位（曲がっている１つの角部）１３（１３Ａ）の幅方向の一方の縁である劣角側の縁５が、円弧状になっている（縁５が急激に鋭角で曲がることなく円弧状になって連続的に滑らかに曲がっている）。   In the fusible part 3, the edge 5 on the minor angle side, which is one edge in the width direction of the boundary part (one bent corner) 13 (13A) between the first part 15 and the second part 17 However, it is arcuate (the edge 5 is arcuately bent smoothly without being bent at an acute angle).

また、可溶体部３では、第２の部位１７と第３の部位１９との境界の部位（曲がっている１つの角部）１３（１３Ｂ）の幅方向の一方の縁である劣角側の縁５が、円弧状になっている（縁５が急激に鋭角で曲がることなく円弧状になって連続的に滑らかに曲がっている。   Further, in the fusible body portion 3, the boundary portion between the second portion 17 and the third portion 19 (one bent corner portion) 13 (13B), which is one edge in the width direction on the minor angle side. The edge 5 has an arc shape (the edge 5 has an arc shape without being bent at an acute angle, and is continuously bent smoothly.

さらに説明すると、第１の部位１５の幅方向の一端２１と、第２の部位１７の幅方向の一端２３とは、円弧２５を介してつながっている。   More specifically, one end 21 in the width direction of the first part 15 and one end 23 in the width direction of the second part 17 are connected via an arc 25.

円弧２５の第１の部位１５側の端２７における接線の傾きは、第１の部位１５の幅方向の一端（直線）２１の傾きと等しくなっている。また、円弧２５の第２の部位１７側の端２９における接線の傾きは、第２の部位１７の幅方向の一端（直線）２３の傾きと等しくなっている。同様にして、第２の部位１７の幅方向の他端３１と、第３の部位１９の幅方向の一端３３とは、円弧３５を介してつながっている。   The inclination of the tangent at the end 27 on the first part 15 side of the arc 25 is equal to the inclination of one end (straight line) 21 of the first part 15 in the width direction. Further, the inclination of the tangent line at the end 29 on the second part 17 side of the arc 25 is equal to the inclination of one end (straight line) 23 of the second part 17 in the width direction. Similarly, the other end 31 in the width direction of the second part 17 and one end 33 in the width direction of the third part 19 are connected via an arc 35.

これにより、ヒューズ装置１では、可溶体部３の曲がっている各箇所１３の劣角側の縁５における接線の傾きが、急激に変化することなく、連続的に徐々に変化していることになる。さらには、可溶体部３に発生する応力集中を軽減するために、可溶体部３の幅方向の縁の少なくとも一部５における接線の傾きが、急激に変化することなく、連続的に徐々に変化していることになる。   Accordingly, in the fuse device 1, the slope of the tangent line at the edge 5 on the minor angle side of each of the bent portions 13 of the fusible body portion 3 is continuously and gradually changed without abruptly changing. Become. Furthermore, in order to reduce the stress concentration generated in the fusible body part 3, the inclination of the tangent line at least at a part 5 of the edge in the width direction of the fusible body part 3 is gradually and gradually changed. It will be changing.

また、可溶体部３では、第２の部位１７の中央部に、放熱部として機能する低融点金属保持部３７が設けられている。低融点金属保持部３７は円形状に形成されており、低融点金属保持部３７の直径は、第２の部位１７の幅よりも大きくなっている。 In the fusible part 3, a low melting point metal holding part 37 that functions as a heat radiating part is provided at the center of the second part 17 . The low melting point metal holding part 37 is formed in a circular shape, and the diameter of the low melting point metal holding part 37 is larger than the width of the second portion 17 .

また、低融点金属保持部３７の外周（縁）と第２の部位１７の幅方向の両端（縁）との境界３９は、応力集中を避けるために、図３（ａ）で示すように、円弧状になっている。   Moreover, in order to avoid stress concentration, the boundary 39 between the outer periphery (edge) of the low melting point metal holding portion 37 and both ends (edges) in the width direction of the second portion 17 is as shown in FIG. It has an arc shape.

低融点金属保持部３７には、低融点金属が設置されるようになっている。そして、可溶体部３に定格以上の電流が流れると、低融点金属が溶融し、溶融した低融点金属が低融点金属保持部３７に拡散し、低融点金属保持部３７の融点を低下させるようになっている。これにより、低融点金属保持部３７が溶断し、可溶体部３での通電が遮断されるようになっている。   The low melting point metal holding portion 37 is provided with a low melting point metal. When a current exceeding the rated value flows in the fusible part 3, the low melting point metal melts, the melted low melting point metal diffuses into the low melting point metal holding part 37, and the melting point of the low melting point metal holding part 37 is lowered. It has become. As a result, the low melting point metal holding part 37 is melted and the energization of the fusible part 3 is cut off.

なお、図２で示す可溶体部３では、第１の部位１５の幅方向の他端４１と第２の部位１７の幅方向の他端３１との境界は、直線状部４３を介してつながっていることで、２箇所の角４５，４７で急激に曲がっている。また、第２の部位１７の幅方向の一端２３と第３の部位１９の幅方向の他端４９との境界は、直線状部５１を介してつながっていることで、２箇所の角５３，５５で急激に曲がっている。   2, the boundary between the other end 41 in the width direction of the first portion 15 and the other end 31 in the width direction of the second portion 17 is connected via the linear portion 43. As a result, the two corners 45 and 47 are bent sharply. In addition, the boundary between the one end 23 in the width direction of the second portion 17 and the other end 49 in the width direction of the third portion 19 is connected via the linear portion 51, so that two corners 53, At 55, it turns sharply.

このように急激に曲がっている角４５，４７，５３，５５を無くすために、図３（ｂ）で示すように、各角４５，４７，５３，５５のところを円弧状に丸めてもよい。   In order to eliminate the corners 45, 47, 53, and 55 that are bent sharply in this way, the corners 45, 47, 53, and 55 may be rounded into arcs as shown in FIG. .

次に、バスバー部７と端子部９との間に引っ張り力Ｆが加わった場合について説明する。引張り力Ｆは、図２で示すように、可溶体部３の第１の部位１５と第３の部位１９とに加わる。   Next, a case where a tensile force F is applied between the bus bar portion 7 and the terminal portion 9 will be described. As shown in FIG. 2, the tensile force F is applied to the first part 15 and the third part 19 of the fusible part 3.

これにより、角部１３Ｂ（１３Ａ）にかかるモーメントＭは、「Ｍ＝Ｆ×ｒ×ｓｉｎ（９０°―θ）＝Ｆ×ｒ×ｃｏｓθ」になる。角部１３Ｂ（１３Ａ）の劣角側の縁５が円弧状の形成されているので、可溶体部３の角部１３Ｂ（１３Ａ）における応力集中係数α１が従来の可溶体部の応力集中係数αよりも小さくなる。   Thereby, the moment M applied to the corner portion 13B (13A) becomes “M = F × r × sin (90 ° −θ) = F × r × cos θ”. Since the edge 5 on the inferior angle side of the corner portion 13B (13A) is formed in an arc shape, the stress concentration coefficient α1 at the corner portion 13B (13A) of the fusible body portion 3 is the stress concentration factor α of the conventional fusible body portion. Smaller than.

なお、図１で示すように、バスバー部７からは、複数の可溶体部３が突出しており、各可溶体部３のそれぞれを介して複数の端子部９のそれぞれがバスバー部７につながっている。   As shown in FIG. 1, a plurality of soluble body portions 3 protrude from the bus bar portion 7, and each of the plurality of terminal portions 9 is connected to the bus bar portion 7 through each of the soluble body portions 3. Yes.

ヒューズ装置１によれば、可溶体部３に発生する応力集中を軽減するために、可溶体部３の縁の一部５の形状が、急激に曲がることなく、円弧状等になって連続的に滑らかに曲がっているので、端子部９に相手側端子を着脱する等して、可溶体部３に外力が加わったときであっても、可溶体部３に発生する応力の値を小さくすることができ、可溶体部３が破断しにくくなる。また、振動等によっても疲労破壊しにくくなる。   According to the fuse device 1, in order to reduce the stress concentration generated in the fusible body part 3, the shape of the part 5 of the edge of the fusible body part 3 becomes a circular arc or the like without being bent suddenly. Therefore, even when an external force is applied to the fusible part 3 by attaching or detaching the counterpart terminal to the terminal part 9, the value of the stress generated in the fusible part 3 is reduced. The fusible part 3 is less likely to break. In addition, it becomes difficult to break down due to vibration or the like.

また、ヒューズ装置１によれば、可溶体部３が、長手方向の中間部の少なくとも２箇所の角部１３で曲がっており、この角部１３の劣角側の縁５が、急激に曲げることなく連続的に滑らかに曲がっているので、角部１３の劣角の角度を大きくする曲げモーメンＭ（図２に示す力Ｆによる曲げモーメント）がかかっても、角部１３（縁５のところ）での応力集中が極力回避され可溶体部３が破断しにくくなる。   Further, according to the fuse device 1, the fusible part 3 is bent at at least two corners 13 in the middle part in the longitudinal direction, and the edge 5 on the inferior angle side of the corner 13 is bent sharply. The corner portion 13 (at the edge 5) is not bent even if a bending moment M (bending moment due to the force F shown in FIG. 2) is applied. The stress concentration in is avoided as much as possible, and the fusible part 3 is less likely to break.

また、ヒューズ装置１によれば、可溶体部３が「Ｚ」字状に形成されており、「Ｚ」字の２つの角部１３それぞれで、劣角の箇所が円弧状に形成されているので、角部１３の劣角の角度を大きくする曲げモーメンＭがかかっても、曲がっている角部１３（縁５のところ）での応力集中が極力回避され可溶体部３が破断しにくくなる。   Further, according to the fuse device 1, the fusible body portion 3 is formed in a “Z” shape, and the subordinate portions are formed in an arc shape in each of the two corner portions 13 of the “Z” shape. Therefore, even if the bending moment M that increases the angle of the inferior angle of the corner portion 13 is applied, stress concentration at the bent corner portion 13 (at the edge 5) is avoided as much as possible, and the fusible body portion 3 is difficult to break. .

また、可溶体部３が「Ｚ」字状に形成されているので、可溶体部３の伸縮（図２の上下方向における伸縮）を吸収することができ、可溶体部３が破断しにくくなる。   Moreover, since the soluble body part 3 is formed in a “Z” shape, the expansion and contraction of the soluble body part 3 (extension in the vertical direction in FIG. 2) can be absorbed, and the soluble body part 3 is difficult to break. .

なお、上記説明では、図１や図２の上下方向で可溶体部３（バスバー部７、端子部９）に力がかかる場合について説明したが、図１や図２の左右方向でバスバー部７と端子部９とに力が加わる場合であっても、可溶体部３での応力集中を軽減することができる。この場合、図１に示す可溶体部３とバスバー部７との境界の縁６１、図１に示す可溶体部３と端子部９との境界の縁６３が円弧状に形成される等して、連続的に滑らかに曲がっていることが望ましい。   In the above description, the case where a force is applied to the fusible body portion 3 (the bus bar portion 7 and the terminal portion 9) in the vertical direction in FIGS. 1 and 2 has been described. However, the bus bar portion 7 in the left and right direction in FIGS. Even when force is applied to the terminal portion 9, stress concentration in the fusible body portion 3 can be reduced. In this case, the boundary edge 61 between the fusible body portion 3 and the bus bar portion 7 shown in FIG. 1 and the border edge 63 between the fusible body portion 3 and the terminal portion 9 shown in FIG. It is desirable to bend continuously and smoothly.

また、上記説明では、可溶体部３が「Ｚ」字状に形成されている場合を例に掲げて説明したが、可溶体部３の形状が、図５（ａ）で示すように、４箇所で曲がっている「己」字状になっていてもよい。この場合においても、各角部５７Ａ，５７Ｂ，５７Ｃ，５７Ｄの劣角側の縁５９Ａ，５９Ｂ，５９Ｃ，５９Ｄが円弧状になっている。   In the above description, the case where the fusible part 3 is formed in a “Z” shape has been described as an example. However, the shape of the fusible part 3 is 4 as shown in FIG. It may be a "self" shape that is bent at a point. Also in this case, the edges 59A, 59B, 59C, 59D on the inferior angle side of the corners 57A, 57B, 57C, 57D are arcuate.

さらに、可溶体部３の形状が、図５（ａ）で示すように、２つの「Ｊ」字を低融点金属保持部３７を介してつなげた形状になっていてもよい。   Furthermore, as shown in FIG. 5A, the fusible body portion 3 may have a shape in which two “J” characters are connected via a low melting point metal holding portion 37.

１ ヒューズ装置
３ 可溶体部
５ 可溶体部の縁の一部（劣角側の縁）
１３ 曲がり箇所（角部）
１５ 第１の部位
１７ 第２の部位
１９ 第３の部位 1 fuse device 3 fusible part 5 part of the edge of the fusible part (edge on the inferior angle side)
13 Bending point (corner)
15 1st part 17 2nd part 19 3rd part

Claims (1)

可溶体部に発生する応力集中を軽減するために、前記可溶体部の縁の一部の形状が、連続的に滑らかに曲がっており、
前記可溶体部は、長手方向の中間部の少なくとも２箇所で曲がっており、前記曲がっている各箇所の劣角側の縁が、連続的に滑らかに曲がっており、
前記可溶体部は、所定の幅で所定の長さ延びている第１の部位と、所定の幅で所定の長さ延びている第２の部位と、所定の幅で所定の長さ延びている第３の部位とで、「Ｚ」字状に形成されており、
前記第１の部位と前記第２の部位との境界の部位の幅方向の一方の縁である劣角側の縁のみが、円弧状になっており、
前記第２の部位と前記第３の部位との境界の部位の幅方向の一方の縁である劣角側の縁のみが、円弧状になっており、
前記第１の部位と前記第３の部位との間で延びている前記第２の部位の中央部には、低融点金属保持部が設けられていることを特徴とするヒューズ装置。 In order to reduce the stress concentration generated in the fusible body part, the shape of a part of the edge of the fusible body part is bent continuously and smoothly ,
The fusible body part is bent at at least two places in the middle part in the longitudinal direction, and the edge on the minor angle side of each of the bent parts is continuously and smoothly bent,
The fusible body portion has a first portion extending a predetermined length with a predetermined width, a second portion extending a predetermined length with a predetermined width, and a predetermined length with a predetermined width. The third part is formed in a “Z” shape,
Only the edge on the minor angle side, which is one edge in the width direction of the boundary part between the first part and the second part, has an arc shape,
Only the edge on the minor angle side that is one edge in the width direction of the boundary part between the second part and the third part has an arc shape,
A fuse device , wherein a low melting point metal holding portion is provided at a central portion of the second portion extending between the first portion and the third portion .
JP2013223263A 2013-10-28 2013-10-28 Fuse device Active JP6295060B2 (en)

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