JPH04319223A - Fusing and fuse provided with degradation detection mechanism - Google Patents
Fusing and fuse provided with degradation detection mechanismInfo
- Publication number
- JPH04319223A JPH04319223A JP8515691A JP8515691A JPH04319223A JP H04319223 A JPH04319223 A JP H04319223A JP 8515691 A JP8515691 A JP 8515691A JP 8515691 A JP8515691 A JP 8515691A JP H04319223 A JPH04319223 A JP H04319223A
- Authority
- JP
- Japan
- Prior art keywords
- fuse
- deterioration
- detection
- fuse element
- fusing
- 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.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 55
- 230000015556 catabolic process Effects 0.000 title abstract 4
- 238000006731 degradation reaction Methods 0.000 title abstract 4
- 229910001285 shape-memory alloy Inorganic materials 0.000 claims abstract description 15
- 230000006866 deterioration Effects 0.000 claims description 48
- 230000006870 function Effects 0.000 claims description 18
- 238000007664 blowing Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 abstract description 5
- 238000002844 melting Methods 0.000 abstract description 5
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000020169 heat generation Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/12—Shape memory
-
- 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
- H01H2085/0004—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 making use of shape-memory material
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明はヒユーズ素子の溶断及び
劣化を検出し表示する機能を有するヒユーズに関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuse having a function of detecting and displaying blowout and deterioration of a fuse element.
【０００２】0002
【従来の技術】図７および図８に、ヒユーズ素子の溶断
のみを検出し表示する機能を有する従来のヒユーズの構
成を示す。図７はヒユーズが溶断していない状態を示す
断面図、図８はヒユーズが溶断した状態を示す断面図で
ある。2. Description of the Related Art FIGS. 7 and 8 show the structure of a conventional fuse having a function of detecting and displaying only the blowout of a fuse element. FIG. 7 is a sectional view showing a state in which the fuse is not blown, and FIG. 8 is a sectional view showing a state in which the fuse is blown.
【０００３】図７において、ヒユーズ１００の筐体６の
内部にはしや断されるべきレベルの大電流（以下しや断
電流とする）により溶断されるヒユーズ素子１が複数並
列に設けられている。また、ヒユーズ素子１と並列に可
溶部２ａを有する線状の溶断検出素子２が設けられてい
る。
溶断検出素子２の一端は筐体６の一方の導電キャップ６
ａに固定され、他端には表示素子（表示棒）３が接続さ
れている。また、表示素子３は圧縮ばね４を介して、筐
体６の他方の導電キャップ６ｂに設けられた表示素子ケ
ース６ｃにしゆう動自在に保持されている。図７に示す
ように、ヒユーズ素子１が溶断されていない状態では表
示素子３の先端部３ａは圧縮ばね４を圧縮しかつ筐体６
の内部に引込んでいる。In FIG. 7, a plurality of fuse elements 1 are arranged in parallel inside a casing 6 of a fuse 100, and are blown by a large current (hereinafter referred to as a rupture current) of a level that requires rupture. There is. Further, a linear fusing detection element 2 having a fusible portion 2a is provided in parallel with the fuse element 1. One end of the fusing detection element 2 is connected to one conductive cap 6 of the housing 6.
a, and a display element (display bar) 3 is connected to the other end. Further, the display element 3 is movably held in a display element case 6c provided on the other conductive cap 6b of the housing 6 via a compression spring 4. As shown in FIG. 7, when the fuse element 1 is not blown, the tip 3a of the display element 3 compresses the compression spring 4 and the housing 6.
It is drawn into the inside of.
【０００４】ヒユーズ１００にしや断電流が流れると、
最初にヒユーズ素子１が溶断される。この時点では溶断
検出素子２の溶断部２ａはまだ溶断されていない。次に
、前記しや断電流は溶断検出素子２に流れるため、可溶
部２ａが溶断される。可溶部２ａが溶断されると、表示
素子３は圧縮ばね４の付勢力により図中右方向に移動し
、その先端部３ａは筐体６の外部へ突出する。この状態
を図８に示す。[0004] When a broken current flows through the fuse 100,
First, fuse element 1 is blown. At this point, the fusing portion 2a of the fusing detection element 2 has not yet been fused. Next, since the shear current flows to the fusing detection element 2, the fusible portion 2a is fused. When the fusible portion 2a is fused, the display element 3 moves rightward in the figure due to the biasing force of the compression spring 4, and its tip 3a protrudes to the outside of the casing 6. This state is shown in FIG.
【０００５】次に、図９に例えば特開昭５７−８２７号
公報に記載された従来のヒユーズ劣化検出装置の回路を
示す。
図９において、しや断電流により溶断される主ヒユーズ
２１と、主ヒユーズ２１の劣化特性と同じ若しくはそれ
以下の溶断特性を有する劣化検出ヒユーズ２２は並列に
接続されている。劣化検出ヒユーズ２２の近傍にはその
溶断を検出するための、劣化検出ヒユーズ２２の溶断に
より動作される接点２３が設けられている。Next, FIG. 9 shows a circuit of a conventional fuse deterioration detection device described in, for example, Japanese Unexamined Patent Publication No. 57-827. In FIG. 9, a main fuse 21 that is blown by a shear current and a deterioration detection fuse 22 that has a fusing characteristic that is equal to or lower than the deterioration characteristic of the main fuse 21 are connected in parallel. A contact 23 is provided near the deterioration detection fuse 22 and is operated when the deterioration detection fuse 22 blows to detect its blowout.
【０００６】回路に、主ヒユーズ２１の劣化特性よりも
大きくかつ溶断特性よりも小さい電流が流れると、主ヒ
ユーズ２１は溶断しないが劣化する。このとき、劣化検
出ヒユーズ２２の溶断特性は主ヒユーズの劣化特性以下
に設定されているので、劣化検出ヒユーズ２２はただち
に溶断する。接点２３は劣化検出ヒユーズ２２の溶断に
より導通し、電気的に主ヒユーズ２１の劣化を検出する
。When a current that is larger than the deterioration characteristics of the main fuse 21 and smaller than its fusing characteristics flows through the circuit, the main fuse 21 does not blow, but deteriorates. At this time, since the fusing characteristic of the deterioration detection fuse 22 is set to be lower than the deterioration characteristic of the main fuse, the deterioration detection fuse 22 immediately blows out. The contact 23 becomes conductive when the deterioration detection fuse 22 melts, and electrically detects deterioration of the main fuse 21.
【０００７】[0007]
【発明が解決しようとする課題】図７及び図８に示した
従来例においては、ヒユーズ単体では、ヒユーズ素子の
溶断しか検出できなかった。そのため、ヒユーズ素子の
劣化により突然ヒユーズが溶断し、工場等が停電し不便
が生ずるという問題点を有していた。また、突然の停電
を未然に防止するためには、ヒユーズ素子の劣化にかか
わらず全てのヒユーズを定期的に交換しなければならず
、費用がかかるという問題を有していた。In the conventional example shown in FIGS. 7 and 8, only the blowout of the fuse element could be detected using a single fuse. As a result, there has been a problem in that the fuse suddenly blows out due to deterioration of the fuse element, causing power outage and inconvenience in factories and the like. Furthermore, in order to prevent sudden power outages, all fuses must be replaced periodically regardless of the deterioration of the fuse elements, which is costly.
【０００８】一方、図９に示す従来例においては、主ヒ
ユーズの劣化を検出するために劣化検出用ヒユーズを並
列に接続しなければならず、回路構成が複雑となり費用
もかかるという問題点を有していた。On the other hand, in the conventional example shown in FIG. 9, deterioration detection fuses must be connected in parallel in order to detect deterioration of the main fuse, resulting in a complicated circuit configuration and increased costs. Was.
【０００９】この発明は以上のような問題点を解決する
ためになされたものであり、ヒユーズ単体にてヒユーズ
素子の様断及び劣化の両方を検出することができる溶断
及び劣化検出機能付ヒユーズを提供することを目的とし
ている。The present invention was made to solve the above-mentioned problems, and provides a fuse with a blowout and deterioration detection function that can detect both the breakage and deterioration of a fuse element with a single fuse. is intended to provide.
【００１０】0010
【課題を解決するための手段】第１の発明に係る溶断及
び劣化検出機能付ヒユーズは、筐体内部に保持され、し
や断電流により溶断されるヒユーズ素子と、ヒユーズ素
子に並列に設けられ、ヒユーズ素子の溶断に引続いてし
や断電流により溶断される可溶部とヒユーズ素子の劣化
に伴う発熱により変形する形状記憶合金部とを有する検
出素子と、検出素子の一端に接続されかつ筐体に弾性部
材を介して保持された表示素子と、を具備している。ま
た、第２の発明に係る溶断及び劣化検出機能付ヒユーズ
は、筐体内部に保持され、しや断電流により溶断される
ヒユーズ素子と、ヒユーズ素子に並列に設けられ、ヒユ
ーズ素子の溶断に引続いてしや断電流により溶断される
可溶部を有する溶断検出素子と、溶断検出素子の一端に
接続されかつ筐体に弾性部材を介して保持された表示素
子と、ヒユーズ素子の近傍に設けられ、ヒユーズ素子の
劣化に伴う発熱を検出し、筐体外部に検出信号を出力す
る温度検出素子と、を具備している。[Means for Solving the Problems] A fuse with a fusing and deterioration detection function according to the first invention includes a fuse element that is held inside a casing and is blown by a shearing current, and a fuse element that is provided in parallel with the fuse element. , a sensing element having a fusible part that is fused by a shear current following the fusing of the fuse element, and a shape memory alloy part that is deformed by heat generated as the fuse element deteriorates, and a sensing element connected to one end of the sensing element; The display device includes a display element held in the housing via an elastic member. Further, the fuse with a fusing and deterioration detection function according to the second invention includes a fuse element that is held inside the casing and is blown by a shear current, and a fuse element that is provided in parallel with the fuse element and is triggered by the fusing of the fuse element. Next, a fusing detection element having a fusible part that is fused by the fuse current, a display element connected to one end of the fusing detection element and held by the housing via an elastic member, and a display element provided near the fuse element. and a temperature detection element that detects heat generated due to deterioration of the fuse element and outputs a detection signal to the outside of the housing.
【００１１】[0011]
【作用】第１の発明においては、ヒユーズ素子の劣化に
伴う発熱により検出素子の形状記憶合金部が変形する。
形状記憶合金部の変形により、検出素子に接続された表
示素子が移動し、筐体外部に突出する。形状記憶合金部
の変形量を、ヒユーズ素子が溶断した場合における表示
素子の変位量よりも小さくすることにより、ヒユーズ素
子の溶断の場合とヒユーズ素子の劣化の場合とを区別す
る。[Operation] In the first invention, the shape memory alloy portion of the detection element is deformed due to heat generated due to deterioration of the fuse element. Due to the deformation of the shape memory alloy portion, the display element connected to the detection element moves and protrudes to the outside of the casing. By making the amount of deformation of the shape memory alloy part smaller than the amount of displacement of the display element when the fuse element is blown, a case where the fuse element is blown out and a case where the fuse element is deteriorated are distinguished.
【００１２】第２の発明においては、ヒユーズ素子の劣
化に伴う発熱により、ヒユーズ素子の近傍に設けた温度
検出素子が作動し、外部に電気信号を出力する。これに
よりヒユーズの劣化を検出する。In the second aspect of the invention, the temperature detection element provided near the fuse element is activated by heat generated due to deterioration of the fuse element, and outputs an electrical signal to the outside. This detects deterioration of the fuse.
【００１３】[0013]
【実施例】第１の発明に係る溶断及び劣化検出機能付ヒ
ユーズの第１の実施例を図１、図２及び図３を用いて説
明する。図１は第１の実施例における溶断及び劣化検出
機能付ヒユーズの正常な状態すなわちヒユーズ素子１が
溶断も劣化もしていない状態を示す断面図、図２は同ヒ
ユーズ素子１が劣化した状態を示す断面図、図３は同ヒ
ユーズ素子１が溶断した状態を示す断面図である。DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a fuse with fusing and deterioration detection functions according to the first invention will be described with reference to FIGS. 1, 2, and 3. FIG. 1 is a cross-sectional view showing a normal state of the fuse with a blowout and deterioration detection function in the first embodiment, that is, a state in which the fuse element 1 is neither blown out nor deteriorated, and FIG. 2 is a cross-sectional view showing a state in which the fuse element 1 is deteriorated. 3 is a cross-sectional view showing the fuse element 1 in a blown state.
【００１４】図１〜３において、ヒユーズ１００の筐体
６の内部には、しや断電流により溶断されるヒユーズ素
子１が複数並列に設けられている。また、ヒユーズ素子
１と電気的に並列に、可溶部２ａ及び形状記憶合金部２
ｂを有する検出素子２が設けられている。検出素子２の
一端は筐体６の一方の導電キャップ６ａに固定され、他
端には表示素子（表示棒）３が接続されている。検出素
子２の形状記憶合金部２ｂは低温時（常温時）には図１
に示すように縮んだ状態を示し、高温時（ヒユーズ素子
１の劣化による発熱時）は図２に示すように伸びた状態
を示すように製作されている。表示素子３は圧縮ばね４
を介して、筐体６の他方の導電キャップ６ｂに設けられ
た表示素子ケース６ｃにしゆう動自在に保持されている
。ヒユーズ素子１が溶断されず、また劣化もしていない
正常な状態では、図１に示すように表示素子３は圧縮ば
ね４を圧縮しつつその先端部３ａが筐体６の内部に引込
んでいる。1 to 3, inside a casing 6 of a fuse 100, a plurality of fuse elements 1, which are blown by a shear current, are arranged in parallel. Further, a fusible part 2a and a shape memory alloy part 2 are electrically connected in parallel with the fuse element 1.
A detection element 2 is provided which has b. One end of the detection element 2 is fixed to one conductive cap 6a of the housing 6, and the display element (display bar) 3 is connected to the other end. The shape memory alloy part 2b of the detection element 2 is as shown in Fig. 1 at low temperature (at room temperature).
It is manufactured so that it shows a contracted state as shown in FIG. 2, and an expanded state as shown in FIG. 2 at high temperatures (when heat is generated due to deterioration of the fuse element 1). The display element 3 is a compression spring 4
It is movably held in a display element case 6c provided on the other conductive cap 6b of the housing 6 via the display element case 6c. In a normal state in which the fuse element 1 is neither blown nor deteriorated, the display element 3 compresses the compression spring 4 and its tip 3a is retracted into the housing 6, as shown in FIG.
【００１５】ヒユーズ１００にヒユーズ素子１が溶断す
るしや断電流レベルよりも低いが、ヒユーズ素子１の劣
化特性よりも大きいレベルの電流が流れると、ヒユーズ
素子１が劣化し、これに伴い発熱する。この発熱により
、検出素子２の形状記憶合金部２ｂがヒユーズ素子１の
配列方向に伸びるように変形する。この状態を図２に示
す。
このとき検出素子２に接続された表示素子３は形状記憶
合金部２ｂの変形及び圧縮ばね４の付勢力により、その
先端部３ａが筐体６の導電キャップ６ｂより外部へ突出
する。
ここで、形状記憶合金部２ｂの変形量を、表示素子３が
表示素子ケース６ｃ中をしゆう動可能な全ストロークよ
りも短くする。これにより、ヒユーズ素子１が劣化した
場合には表示素子３の先端部３ａは筐体６の外部へ突出
するが、完全には突出しないため、ヒユーズ素子１が溶
断した場合と区別することができる。When a current flows through the fuse 100 at a level lower than the blown current level but greater than the deterioration characteristics of the fuse element 1 when the fuse element 1 blows, the fuse element 1 deteriorates and generates heat accordingly. . This heat generation causes the shape memory alloy portion 2b of the detection element 2 to deform so as to extend in the direction in which the fuse elements 1 are arranged. This state is shown in FIG. At this time, the distal end portion 3a of the display element 3 connected to the detection element 2 protrudes outward from the conductive cap 6b of the housing 6 due to the deformation of the shape memory alloy portion 2b and the biasing force of the compression spring 4. Here, the amount of deformation of the shape memory alloy portion 2b is made shorter than the full stroke that the display element 3 can move within the display element case 6c. As a result, when the fuse element 1 deteriorates, the tip 3a of the display element 3 protrudes to the outside of the casing 6, but it does not protrude completely, so it can be distinguished from the case where the fuse element 1 is blown. .
【００１６】次に、ヒユーズ１００にしや断電流が流れ
た場合、まずヒユーズ素子１がしや断電流により溶断さ
れる。続いてしや断電流は検出素子２に流れるため、検
出素子２の可溶部２ａが溶断される。可溶部２ａが溶断
されると、表示素子３は圧縮ばね４の付勢力により筐体
６の導電キャップ６ｂの外部に、その先端部３ａが完全
に突出する。これによりヒユーズ素子１の溶断を検出す
る。Next, when a ruptured current flows through the fuse 100, the fuse element 1 is first blown by the ruptured current. Subsequently, the shear current flows to the detection element 2, so that the fusible portion 2a of the detection element 2 is fused. When the fusible portion 2a is fused, the distal end portion 3a of the display element 3 completely protrudes outside the conductive cap 6b of the housing 6 due to the biasing force of the compression spring 4. As a result, blowing of the fuse element 1 is detected.
【００１７】第１の発明に係る溶断及び劣化表示機能付
ヒユーズの第２の実施例を図４及び図５を用いて説明す
る。図４は第２の実施例における溶断及び劣化検出機能
付ヒユーズの正常な状態を示す断面図、図５は同ヒユー
ズ素子１が劣化した状態を示す断面図である。なお、上
記第１の実施例と同一の番号を付した部材は同一又は同
一の機能を有するため、その説明を省略する。A second embodiment of the fuse with fusing and deterioration display functions according to the first invention will be described with reference to FIGS. 4 and 5. FIG. 4 is a cross-sectional view showing a normal state of the fuse with fusing and deterioration detection functions in the second embodiment, and FIG. 5 is a cross-sectional view showing the fuse element 1 in a deteriorated state. It should be noted that the members given the same numbers as those in the first embodiment have the same or the same functions, and therefore their explanations will be omitted.
【００１８】図４及び図５に示す第２の実施例において
、検出素子２のうち可溶部２ａを除く残りの部分２ｃが
全て形状記憶合金で製作され、かつ伸長変形する部分が
複数形成されている。従って、ヒユーズ素子１が極部的
に劣化し、当該部分のみが発熱しても、劣化した部分の
近傍の形状記憶合金２ｃが変形し伸長する。このため、
ヒユーズ素子１の極部的な劣化も確実に検出する。In the second embodiment shown in FIGS. 4 and 5, the remaining portion 2c of the detection element 2 excluding the fusible portion 2a is entirely made of a shape memory alloy, and a plurality of elongated and deformable portions are formed. ing. Therefore, even if the fuse element 1 deteriorates locally and only that part generates heat, the shape memory alloy 2c in the vicinity of the deteriorated part deforms and expands. For this reason,
Even local deterioration of the fuse element 1 is reliably detected.
【００１９】次に、第２に発明に係る溶断及び劣化検出
機能付ヒユーズの一実施例を図６を用いて説明する。図
６はこの実施例における溶断及び劣化表示機能付ヒユー
ズの正常な状態を示す断面図である。Next, a second embodiment of a fuse with a blowout and deterioration detection function according to the invention will be described with reference to FIG. FIG. 6 is a sectional view showing the normal state of the fuse with a blowout and deterioration display function in this embodiment.
【００２０】図６において、ヒユーズ１００の筐体６の
内部にはしや断されるべきレベルの大電流（以下しや断
電流とする）により溶断されるヒユーズ素子１が複数並
列に設けられている。また、ヒユーズ素子１と並列に可
溶部２ａを有する線状の検出素子２が設けられている。
検出素子２の一端は筐体６の一方の導電キャップ６ａに
固定され、他端には表示素子（表示棒）３が接続されて
いる。
また、表示素子３は圧縮ばね４を介して、筐体６の他方
の導電キャップ６ｂに設けられた表示素子ケース６ｃに
しゆう動自在に保持されている。さらに、ヒユーズ素子
１の近傍における筐体６の内部には温度検出素子１１（
感温スイッチ等）が設けられ、筐体６の外部には温度検
出素子１１の出力端子１２が設けられている。In FIG. 6, a plurality of fuse elements 1 which are blown by a large current (hereinafter referred to as a "blow current") at a level that should be cut quickly are arranged in parallel inside a casing 6 of a fuse 100. There is. Further, a linear detection element 2 having a fusible portion 2a is provided in parallel with the fuse element 1. One end of the detection element 2 is fixed to one conductive cap 6a of the housing 6, and the display element (display bar) 3 is connected to the other end. Further, the display element 3 is movably held in a display element case 6c provided on the other conductive cap 6b of the housing 6 via a compression spring 4. Furthermore, a temperature detection element 11 (
An output terminal 12 of a temperature detection element 11 is provided outside the housing 6.
【００２１】ヒユーズ素子１の劣化により発熱が生じた
場合、温度検出素子１１（例えば感温スイッチ）はその
接点を閉じ、出力端子１２から電気信号として出力され
る。
この信号によりヒユーズ素子１の劣化を検出する。When heat generation occurs due to deterioration of the fuse element 1, the temperature detection element 11 (for example, a temperature-sensitive switch) closes its contact and is output from the output terminal 12 as an electrical signal. Deterioration of the fuse element 1 is detected using this signal.
【００２２】[0022]
【発明の効果】以上のように第１の発明によれば検出素
子２の可溶部２ａの溶断によるヒユーズ素子１の溶断の
検出と共に、ヒユーズ素子１の劣化による発熱により検
出素子２の形状記憶合金部２ｂを伸長変形させ、表示素
子３を筐体６から突出させ、ヒユーズ素子１の劣化を機
械的に検出し表示している。また、第２の発明によれば
、ヒユーズ素子１の劣化による発熱により温度検出素子
１１の温度スイッチを作動させ、ヒユーズ素子１の劣化
を電気的に検出している。従って、ヒユーズ１００単体
により、ヒユーズ素子１の溶断及び劣化の両方を検出す
ることができる。As described above, according to the first invention, not only the melting of the fuse element 1 due to the melting of the fusible portion 2a of the detecting element 2 is detected, but also the shape memory of the detecting element 2 due to the heat generated due to the deterioration of the fuse element 1. The alloy part 2b is elongated and deformed, the display element 3 is made to protrude from the housing 6, and deterioration of the fuse element 1 is mechanically detected and displayed. Further, according to the second invention, the temperature switch of the temperature detection element 11 is actuated by the heat generated due to the deterioration of the fuse element 1, and the deterioration of the fuse element 1 is electrically detected. Therefore, both the melting and deterioration of the fuse element 1 can be detected using the fuse 100 alone.
【図１】図１は、第１の発明に係る溶断及び劣化検出機
能付ヒユーズの第１の実施例の構成を示す断面図。FIG. 1 is a cross-sectional view showing the structure of a first embodiment of a fuse with fusing and deterioration detection functions according to the first invention.
【図２】図２は、同、ヒユーズ素子１が劣化した状態を
示す断面図。FIG. 2 is a cross-sectional view showing the fuse element 1 in a deteriorated state.
【図３】図３は、同、ヒユーズ素子１が溶断した状態を
示す断面図。FIG. 3 is a sectional view showing a state in which the fuse element 1 is blown.
【図４】図４は、第１の発明に係る溶断及び劣化検出機
能付ヒユーズの第２の実施例の構成を示す断面図。FIG. 4 is a cross-sectional view showing the structure of a second embodiment of the fuse with fusing and deterioration detection functions according to the first invention.
【図５】図５は、同、ヒユーズ素子１が劣化した状態を
示す断面図。FIG. 5 is a sectional view showing a state in which the fuse element 1 has deteriorated.
【図６】図６は、第２の発明に係る溶断及び劣化表示機
能付ヒユーズの一実施例の構成を示す断面図。FIG. 6 is a sectional view showing the structure of an embodiment of a fuse with a blowout and deterioration display function according to the second invention.
【図７】図７は、従来の溶断検出機能付ヒユーズの構成
を示す断面図。FIG. 7 is a sectional view showing the configuration of a conventional fuse with a blowout detection function.
【図８】図８は、同、ヒユーズ素子１が溶断した状態を
示す断面図。FIG. 8 is a sectional view showing a state in which the fuse element 1 is blown.
【図９】図９は、従来のヒユーズ劣化検出装置の回路図
。FIG. 9 is a circuit diagram of a conventional fuse deterioration detection device.
１ ヒユーズ素子 ２ 検出素子 ２ａ 可溶部 ２ｂ 形状記憶合金部 ３ 表示素子 ４ 圧縮ばね ６ 筐体 １１ 温度検出素子 １２ 出力端子 1 Fuse element 2 Detection element 2a Flutable part 2b Shape memory alloy part 3 Display element 4 Compression spring 6 Housing 11 Temperature detection element 12 Output terminal
Claims (2)
り溶断されるヒユーズ素子と、ヒユーズ素子に並列に設
けられ、ヒユーズ素子の溶断に引続いてしや断電流によ
り溶断される可溶部とヒユーズ素子の劣化に伴う発熱に
より変形する形状記憶合金部とを有する検出素子と、検
出素子の一端に接続されかつ筐体に弾性部材を介して保
持された表示素子と、を具備する溶断及び劣化検出機能
付ヒユーズ。Claim 1: A fuse element that is held inside a casing and is blown by a shear current, and a fusible fuse element that is provided in parallel with the fuse element and is blown by a shear current following the blowing of the fuse element. A detection element having a shape memory alloy part that deforms due to heat generated due to deterioration of the fuse element; and a display element connected to one end of the detection element and held by a housing via an elastic member. and fuse with deterioration detection function.
り溶断されるヒユーズ素子と、ヒユーズ素子に並列に設
けられ、ヒユーズ素子の溶断に引続いてしや断電流によ
り溶断される可溶部を有する溶断検出素子と、溶断検出
素子の一端に接続されかつ筐体に弾性部材を介して保持
された表示素子と、ヒユーズ素子の近傍に設けられ、ヒ
ユーズ素子の劣化に伴う発熱を検出し、筐体外部に検出
信号を出力する温度検出素子と、を具備する溶断及び劣
化検出機能付ヒユーズ。2. A fuse element that is held inside the casing and is blown by the shear current; and a fusible fuse element that is provided in parallel with the fuse element and that is blown by the shear current after the fuse element is fused. a display element connected to one end of the fuse detection element and held in the housing via an elastic member; and a display element provided near the fuse element to detect heat generated due to deterioration of the fuse element. , a temperature detection element that outputs a detection signal to the outside of the casing, and a fuse with a fusing and deterioration detection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8515691A JPH04319223A (en) | 1991-04-17 | 1991-04-17 | Fusing and fuse provided with degradation detection mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8515691A JPH04319223A (en) | 1991-04-17 | 1991-04-17 | Fusing and fuse provided with degradation detection mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04319223A true JPH04319223A (en) | 1992-11-10 |
Family
ID=13850808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8515691A Pending JPH04319223A (en) | 1991-04-17 | 1991-04-17 | Fusing and fuse provided with degradation detection mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04319223A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998007171A1 (en) * | 1996-08-08 | 1998-02-19 | Siemens Aktiengesellschaft | Fuse link with an indicator device, in particular a central indicator |
| EP0881654A1 (en) * | 1997-05-27 | 1998-12-02 | Schneider Electric Sa | Electric fuse |
| JP2007274765A (en) * | 2006-03-30 | 2007-10-18 | Toshiba Mitsubishi-Electric Industrial System Corp | Power converter |
| CN102543613A (en) * | 2012-02-21 | 2012-07-04 | 王晨侠 | Small fuse with fusing indication function |
| CN104037030A (en) * | 2014-07-02 | 2014-09-10 | 南昌航空大学 | Safety device with U-shaped memory alloy |
-
1991
- 1991-04-17 JP JP8515691A patent/JPH04319223A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998007171A1 (en) * | 1996-08-08 | 1998-02-19 | Siemens Aktiengesellschaft | Fuse link with an indicator device, in particular a central indicator |
| EP0828279A1 (en) * | 1996-08-08 | 1998-03-11 | Siemens Aktiengesellschaft | Cartridge fuse with indicator, particularly central indicator |
| EP0881654A1 (en) * | 1997-05-27 | 1998-12-02 | Schneider Electric Sa | Electric fuse |
| FR2764108A1 (en) * | 1997-05-27 | 1998-12-04 | Schneider Electric Sa | ELECTRIC FUSE |
| JP2007274765A (en) * | 2006-03-30 | 2007-10-18 | Toshiba Mitsubishi-Electric Industrial System Corp | Power converter |
| CN102543613A (en) * | 2012-02-21 | 2012-07-04 | 王晨侠 | Small fuse with fusing indication function |
| CN104037030A (en) * | 2014-07-02 | 2014-09-10 | 南昌航空大学 | Safety device with U-shaped memory alloy |
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