JP2021166160A - Fuse unit - Google Patents

Fuse unit Download PDF

Info

Publication number
JP2021166160A
JP2021166160A JP2020069248A JP2020069248A JP2021166160A JP 2021166160 A JP2021166160 A JP 2021166160A JP 2020069248 A JP2020069248 A JP 2020069248A JP 2020069248 A JP2020069248 A JP 2020069248A JP 2021166160 A JP2021166160 A JP 2021166160A
Authority
JP
Japan
Prior art keywords
housing
fuse unit
cover
conductor
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.)
Granted
Application number
JP2020069248A
Other languages
Japanese (ja)
Other versions
JP7041185B2 (en
Inventor
貴宏 塩浜
Takahiro Shiohama
達也 青木
Tatsuya Aoki
尚也 秋山
Naoya Akiyama
幸子 大石
Sachiko Oishi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yazaki Corp
Original Assignee
Yazaki Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yazaki Corp filed Critical Yazaki Corp
Priority to JP2020069248A priority Critical patent/JP7041185B2/en
Priority to DE102021107581.5A priority patent/DE102021107581A1/en
Priority to FR2103379A priority patent/FR3109015B1/en
Priority to CN202110372474.9A priority patent/CN113496858B/en
Publication of JP2021166160A publication Critical patent/JP2021166160A/en
Application granted granted Critical
Publication of JP7041185B2 publication Critical patent/JP7041185B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • H01H85/165—Casings
    • H01H85/175—Casings characterised by the casing shape or form
    • H01H85/1755—Casings characterised by the casing shape or form composite casing
    • 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
    • H01H85/165—Casings
    • H01H85/175—Casings characterised by the casing shape or form
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/02—Bases, casings, or covers
    • H01H2009/0292—Transparent window or opening, e.g. for allowing visual inspection of contact position or contact condition
    • 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
    • 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
    • H01H85/11—Fusible members characterised by the shape or form of the fusible member with applied local area of a metal which, on melting, forms a eutectic with the main material of the fusible member, i.e. M-effect devices

Landscapes

  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Fuses (AREA)

Abstract

To provide a fuse unit excellent in maintainability.SOLUTION: A fuse unit 1 comprises: a conductor 40 which extends from one side to the other side in a predetermined direction; a blowout part 43 included in the conductor 40; a housing 20 in which the conductor 40 is embedded in such a manner that the blowout part 43 may be exposed; and a transparent cover 30 which is fitted to the housing 20 so as to cover a periphery of the blowout part 43 thus exposed. The cover 30 has: inclined parts 34 each of which extends farther away from the conductor 40 from the one side toward the other side; and plane parts 33 each of which extends to the other side continuously with each of the inclined parts 34. The housing 20 is located closer to the conductor 40 side than a virtual plane H1 including a blowout part P1 and an end P2 on the one side of the inclined part 34. The facing inclined parts 34 of the cover 30 are located so as to sandwich the conductor 40. Each of the inclined parts 34 is located further on the one side than the blowout part 43.SELECTED DRAWING: Figure 4

Description

本発明は、ヒューズユニットに関する。 The present invention relates to a fuse unit.

従来から、所定の電流値で溶断する溶断部を有するヒューズエレメントを樹脂製のハウジング内に収容したヒューズユニットが提案されている。例えば、従来のヒューズユニットの一つは、ヒューズユニットの外部から溶断部を視認できるように、溶断部に対応する箇所にてハウジングに開口部を設け、開口部を透明樹脂製のカバーで覆うようになっている（例えば、特許文献１を参照。）。 Conventionally, a fuse unit has been proposed in which a fuse element having a blown portion that blows at a predetermined current value is housed in a resin housing. For example, in one of the conventional fuse units, an opening is provided in the housing at a portion corresponding to the blown portion so that the blown portion can be visually recognized from the outside of the fuse unit, and the opening is covered with a transparent resin cover. (See, for example, Patent Document 1).

特開２０１５−０２６４９８号公報JP 2015-026498

ところで、車両のヒューズボックス等のようにヒューズユニットを格納する筐体を用いる場合、通常、筐体に設けられている取付穴にヒューズユニットを差し込んで、対象の回路にヒューズエレメントを接続することになる。上述した従来のヒューズユニットは、ヒューズユニットの側面に開口部が設けられているため、上述した取付穴にヒューズユニットを差し込んだ状態では開口部から溶断部を視認することが困難である。そのため、溶断部の状態を確認するためには、その都度、取付穴からヒューズユニットを取り外すことになる。このようなメンテナンス作業の煩雑さには、改善の余地がある。 By the way, when using a housing for storing a fuse unit such as a fuse box of a vehicle, it is usually decided to insert the fuse unit into a mounting hole provided in the housing and connect the fuse element to the target circuit. Become. Since the conventional fuse unit described above is provided with an opening on the side surface of the fuse unit, it is difficult to visually recognize the blown portion from the opening when the fuse unit is inserted into the mounting hole described above. Therefore, in order to check the state of the blown portion, the fuse unit must be removed from the mounting hole each time. There is room for improvement in the complexity of such maintenance work.

本発明の目的の一つは、メンテナンス性に優れたヒューズユニットの提供である。 One of the objects of the present invention is to provide a fuse unit having excellent maintainability.

前述した目的を達成するために、本発明に係るヒューズユニットは、下記［１］〜［３］を特徴としている。
［１］
所定方向の一方側から他方側に延びる導電体と、前記導電体が有する溶断部と、前記溶断部が露出するように前記導電体が埋設されるハウジングと、前記ハウジングに取り付けられて露出した前記溶断部の周囲を覆う透明のカバーと、を備えたヒューズユニットであって、
前記カバーは、
前記一方側から前記他方側に向かうにつれて前記導電体から離れるように延びる傾斜部と、
前記傾斜部に連続して前記他方側に向かうように延びる平面部と、を有し、
前記ハウジングは、
前記溶断部と前記傾斜部の前記一方側の端部とを含む仮想上の平面よりも前記導電体側に位置する、
ヒューズユニットであること。
［２］
上記［１］に記載のヒューズユニットにおいて、
前記カバーの向かい合う前記傾斜部同士が前記導電体を挟むように位置する、
ヒューズユニットであること。
［３］
上記［１］又は上記［２］に記載のヒューズユニットにおいて、
前記傾斜部は、前記溶断部よりも前記一方側に位置する、
ヒューズユニットであること。 In order to achieve the above-mentioned object, the fuse unit according to the present invention is characterized by the following [1] to [3].
[1]
A conductor extending from one side to the other side in a predetermined direction, a fusing portion of the conductor, a housing in which the conductor is embedded so that the fusing portion is exposed, and a housing attached to the housing and exposed. A fuse unit equipped with a transparent cover that covers the periphery of the blown part.
The cover is
An inclined portion extending away from the conductor as it goes from one side to the other side,
It has a flat surface portion that is continuous with the inclined portion and extends toward the other side.
The housing is
Located on the conductor side of the virtual plane including the fusing portion and the one-sided end of the inclined portion.
Must be a fuse unit.
[2]
In the fuse unit described in [1] above,
The inclined portions of the cover facing each other are located so as to sandwich the conductor.
Must be a fuse unit.
[3]
In the fuse unit according to the above [1] or the above [2].
The inclined portion is located on one side of the fusing portion.
Must be a fuse unit.

上記［１］の構成のヒューズユニットによれば、導電体の溶断部を覆う透明のカバーが、導電体から離れるように延びる傾斜部と、傾斜部に連続する平面部と、を有する。ヒューズユニットをヒューズボックス等の筐体の取付穴に挿入した場合、カバーの平面部は従来のヒューズユニットと同様に取付穴の内壁面に向かい合って近接配置されることになるものの、平面部から傾斜して延びる傾斜部は内壁面に覆われた状態にならないため、傾斜部を通じて（例えば、取付穴の開口部の上方から）溶断部を視認し得る。更に、傾斜部とハウジングとの接点（即ち、傾斜部の一方側の端部）と、溶断部と、を含む仮想上の平面よりもハウジングが導電体側にあるため、ハウジングが溶断部の視認の妨げとなることもない。したがって、本構成のヒューズユニットは、従来のヒューズユニットに比べ、メンテナンス性に優れている。 According to the fuse unit having the configuration of [1] above, the transparent cover covering the blown portion of the conductor has an inclined portion extending away from the conductor and a flat portion continuous with the inclined portion. When the fuse unit is inserted into the mounting hole of a housing such as a fuse box, the flat surface of the cover is placed close to the inner wall surface of the mounting hole in the same way as the conventional fuse unit, but it is tilted from the flat surface. Since the inclined portion extending so is not covered with the inner wall surface, the fusing portion can be visually recognized through the inclined portion (for example, from above the opening of the mounting hole). Further, since the housing is on the conductor side of the virtual plane including the contact point between the inclined portion and the housing (that is, one end of the inclined portion) and the fusing portion, the housing can be visually recognized as the fusing portion. It does not interfere. Therefore, the fuse unit having this configuration is superior in maintainability as compared with the conventional fuse unit.

上記［２］の構成のヒューズユニットによれば、カバーの傾斜部によって導電体が挟まれる。そのため、傾斜部に対応した二方向から（例えば、ヒューズユニットの表側と裏側とから）溶断部の状態を視認して確認することができる。よって、本構成のヒューズユニットは、更にメンテナンス性に優れる。 According to the fuse unit having the configuration of [2] above, the conductor is sandwiched by the inclined portion of the cover. Therefore, the state of the blown portion can be visually confirmed from two directions corresponding to the inclined portion (for example, from the front side and the back side of the fuse unit). Therefore, the fuse unit having this configuration is more excellent in maintainability.

上記［３］の構成のヒューズユニットによれば、カバーの傾斜部は、溶断部よりも傾斜部とハウジングとの接点（即ち、傾斜部の一方側の端部）に近い側に配置される。そのため、傾斜部が無い場合（即ち、平面部が上記接点から延びる場合）に比べ、溶断部と平面部との距離を大きくすることができる。その結果、通電時に特に高温になる溶断部が発する熱がカバー（特に平面部）に及ぼす影響を低減できる。更に、筐体の取付穴にヒューズユニットが取り付けられた際、溶断部と作業者の視点との間にカバーの傾斜部が自然に配置されることになる。よって、ヒューズユニットのメンテナンス性を更に向上できる。 According to the fuse unit having the configuration of [3] above, the inclined portion of the cover is arranged closer to the contact point between the inclined portion and the housing (that is, one end of the inclined portion) than the fusing portion. Therefore, the distance between the fusing portion and the flat surface portion can be increased as compared with the case where there is no inclined portion (that is, the flat surface portion extends from the above contact point). As a result, it is possible to reduce the influence of the heat generated by the fusing portion, which becomes particularly hot when energized, on the cover (particularly the flat portion). Further, when the fuse unit is mounted in the mounting hole of the housing, the inclined portion of the cover is naturally arranged between the blown portion and the viewpoint of the operator. Therefore, the maintainability of the fuse unit can be further improved.

このように、本発明によれば、メンテナンス性に優れたヒューズユニットを提供できる。 As described above, according to the present invention, it is possible to provide a fuse unit having excellent maintainability.

以上、本発明について簡潔に説明した。更に、以下に説明される発明を実施するための形態を添付の図面を参照して通読することにより、本発明の詳細は更に明確化されるであろう。 The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments described below with reference to the accompanying drawings.

図１は、本発明の実施形態に係るヒューズユニットの斜視図である。FIG. 1 is a perspective view of a fuse unit according to an embodiment of the present invention. 図２は、ハウジングからカバーを外した状態における図１に示すヒューズユニットの斜視図である。FIG. 2 is a perspective view of the fuse unit shown in FIG. 1 with the cover removed from the housing. 図３は、図１のＡ−Ａ断面図である。FIG. 3 is a cross-sectional view taken along the line AA of FIG. 図４は、図１に示すヒューズユニットをヒューズボックスの筐体に設けられた取付穴に挿入した状態における図１のＡ−Ａ断面に対応する図である。FIG. 4 is a diagram corresponding to the AA cross section of FIG. 1 in a state where the fuse unit shown in FIG. 1 is inserted into a mounting hole provided in the housing of the fuse box.

＜実施形態＞
以下、図面を参照しながら、本発明の実施形態に係るヒューズユニット１について説明する。ヒューズユニット１は、接続部４１（図１参照）に接続されるバッテリ（図示省略）と、各接続部４２（図１参照）にそれぞれ接続される各外部負荷（図示省略）とを電気的に接続すると共に、定格電流を超える大きさの電流が流れたときにバッテリと各外部負荷との電気的接続を断つ機能を有する。 <Embodiment>
Hereinafter, the fuse unit 1 according to the embodiment of the present invention will be described with reference to the drawings. The fuse unit 1 electrically connects a battery (not shown) connected to the connection portion 41 (see FIG. 1) and each external load (not shown) connected to each connection portion 42 (see FIG. 1). In addition to connecting, it has the function of disconnecting the electrical connection between the battery and each external load when a current exceeding the rated current flows.

以下、説明の便宜上、図１〜図４に示すように、「表裏方向」、「左右方向」、「上下方向」、「表」、「裏」、「左」、「右」、「上」及び「下」を定義する。「表裏方向」、「左右方向」及び「上下方向」は、互いに直交している。 Hereinafter, for convenience of explanation, as shown in FIGS. 1 to 4, "front and back direction", "horizontal direction", "vertical direction", "front", "back", "left", "right", "top" And define "below". The "front and back direction", "horizontal direction", and "vertical direction" are orthogonal to each other.

図１及び図２に示すように、ヒューズユニット１は、ヒューズエレメント１０と、ハウジング２０と、ハウジング２０に装着されるカバー３０と、を備える。図３から理解できるように、ハウジング２０及びカバー３０それぞれは、表裏方向の中央を通り且つ表裏方向に垂直な平面（対称面）に関して面対称となる形状を有している。以下、ヒューズユニット１を構成する各部材について順に説明する。 As shown in FIGS. 1 and 2, the fuse unit 1 includes a fuse element 10, a housing 20, and a cover 30 mounted on the housing 20. As can be understood from FIG. 3, each of the housing 20 and the cover 30 has a shape that is plane-symmetric with respect to a plane (symmetric plane) that passes through the center in the front-back direction and is perpendicular to the front-back direction. Hereinafter, each member constituting the fuse unit 1 will be described in order.

まず、ハウジング２０について説明する。ハウジング２０は、ヒューズエレメント１０の大部分を覆う（埋設する）ように、樹脂材料によりヒューズエレメント１０と一体に成形（モールド成形）された樹脂成形体である。ハウジング２０は、図２及び図３から理解できるように、大略的には、左右方向に延びる略直方体状の形状を有する。 First, the housing 20 will be described. The housing 20 is a resin molded body that is integrally molded (molded) with the fuse element 10 by a resin material so as to cover (embed) most of the fuse element 10. As can be understood from FIGS. 2 and 3, the housing 20 generally has a substantially rectangular parallelepiped shape extending in the left-right direction.

ハウジング２０の左右方向に延びる下部２１の厚さ（表裏方向の長さ）は、ハウジング２０の左右方向に延びる上部２２の厚さ（表裏方向の長さ）より大きい。換言すれば、ハウジング２０は、左右方向から見て、上部２２が下部２１より狭い先細りの形状を有している。ハウジング２０がこのような先細りの形状を有することは、ハウジング２０（樹脂成形体）の軽量化に寄与している。 The thickness of the lower portion 21 extending in the left-right direction of the housing 20 (length in the front-back direction) is larger than the thickness of the upper portion 22 extending in the left-right direction of the housing 20 (length in the front-back direction). In other words, the housing 20 has a tapered shape in which the upper portion 22 is narrower than the lower portion 21 when viewed from the left-right direction. The fact that the housing 20 has such a tapered shape contributes to weight reduction of the housing 20 (resin molded product).

上部２２の表裏面には、表裏方向内側に窪み且つ左右方向に延びる一対の窪み部２２ａが形成されている。一対の窪み部２２ａは、作業者がハウジング２０の上部２２を掴んでヒューズユニット１を相手側部材（例えば、ヒューズボックス）の筐体６０の取付穴６１（図４参照）に挿入する作業を行う際に、作業者がハウジング２０の上部２２を掴み易くする機能を果たす。 On the front and back surfaces of the upper portion 22, a pair of recessed portions 22a that are recessed inward in the front and back directions and extend in the left-right direction are formed. The pair of recessed portions 22a is used by an operator to grasp the upper portion 22 of the housing 20 and insert the fuse unit 1 into the mounting hole 61 (see FIG. 4) of the housing 60 of the mating member (for example, a fuse box). At that time, it functions to make it easier for the operator to grasp the upper portion 22 of the housing 20.

下部２１と上部２２との間に位置するハウジング２０の左右方向に延びる中央部２３には、複数（本例では、３つ）の開口部２４が、左右方向に並ぶように区画形成されている。各開口部２４は、表裏方向に貫通する矩形状の孔である。中央部２３の左側端部における表裏方向の両端部には、一対の係合部２５が形成されている。カバー３０のハウジング２０への装着状態にて、一対の係合部２５には、カバー３０の後述する一対の係合片３５が係合することになる（図１参照）。 A plurality of (three in this example) openings 24 are formed in a central portion 23 extending in the left-right direction of the housing 20 located between the lower portion 21 and the upper portion 22 so as to be arranged in the left-right direction. .. Each opening 24 is a rectangular hole penetrating in the front-back direction. A pair of engaging portions 25 are formed at both ends in the front-back direction at the left end portion of the central portion 23. When the cover 30 is attached to the housing 20, the pair of engaging portions 25 are engaged with the pair of engaging pieces 35 described later of the cover 30 (see FIG. 1).

次いで、ヒューズエレメント１０について説明する。ヒューズエレメント１０は、図２に示すように、バスバ４０（平板状の金属部材）と、バスバ４０の一部である複数（本例では、３つ）の溶断部４３にそれぞれ配置された複数（本例では、３つ）の低融点体５０と、を備える。 Next, the fuse element 10 will be described. As shown in FIG. 2, the fuse elements 10 are arranged in a bus bar 40 (flat metal member) and a plurality of fuse elements 43 (three in this example) that are a part of the bus bar 40 (three in this example). In this example, three) low melting point bodies 50 are provided.

バスバ４０は、表裏方向に垂直な方向に延びる平板状の形状を有し、バスバ４０の板厚は、本例では、全域に亘って一定である。バスバ４０の大部分は、ハウジング２０の上記対称面を含んで上記対称面に沿って延びるように、ハウジング２０に埋設されている（図３参照）。 The bus bar 40 has a flat plate shape extending in a direction perpendicular to the front and back directions, and the plate thickness of the bus bar 40 is constant over the entire area in this example. Most of the bus bar 40 is embedded in the housing 20 so as to include the plane of symmetry of the housing 20 and extend along the plane of symmetry (see FIG. 3).

バスバ４０は、ハウジング２０から外部に露出している部位として、図２に示すように、接続部４１と、複数（本例では、３つ）の接続部４２と、複数（本例では、３つ）の溶断部４３と、を備える。 As shown in FIG. 2, the bus bar 40 has a connecting portion 41, a plurality of connecting portions 42 (three in this example), and a plurality of connecting portions 42 (3 in this example) as portions exposed to the outside from the housing 20. It is provided with a fusing portion 43 of (1).

接続部４１は、ハウジング２０の左側端面から左方に突出している。接続部４１には、車両のバッテリの上面に配置されたバッテリポストに接続されたバッテリ端子（図示省略）が接続されることになる。 The connecting portion 41 projects to the left from the left end surface of the housing 20. A battery terminal (not shown) connected to a battery post arranged on the upper surface of the battery of the vehicle is connected to the connection portion 41.

複数の接続部４２は、ハウジング２０の下側端面から下方に突出しており、複数の開口部２４に対応して左右方向に並ぶように配置されている。各接続部４２には、対応する外部負荷から延びる電線の端末に設けられた端子（図示省略）が接続されることになる。 The plurality of connecting portions 42 project downward from the lower end surface of the housing 20, and are arranged so as to be arranged in the left-right direction corresponding to the plurality of openings 24. Each connection portion 42 is connected to a terminal (not shown) provided at the end of the electric wire extending from the corresponding external load.

複数の溶断部４３の各々は、対応する開口部２４の内部に位置している。各溶断部４３は、対応する開口部２４の表裏開口を介して表側及び裏側の双方に露出しており、表側及び裏側の双方から視認可能となっている。各溶断部４３の表裏面の一方（本例では、表側面）には、低融点体５０が載置されている。低融点体５０を構成する材料（例えば、錫（Ｓｎ）を主成分とする合金）の融点は、バスバ４０（溶断部４３）を構成する材料（例えば、銅（Ｃｕ）を主成分とする合金）の融点よりも低い。 Each of the plurality of fusing portions 43 is located inside the corresponding opening 24. Each fusing portion 43 is exposed to both the front side and the back side through the front and back openings of the corresponding opening 24, and is visible from both the front side and the back side. A low melting point body 50 is placed on one of the front and back surfaces (front side surface in this example) of each fusing portion 43. The melting point of the material constituting the low melting point body 50 (for example, an alloy containing tin (Sn) as a main component) is the melting point of the material constituting the bus bar 40 (fusing portion 43) (for example, an alloy containing copper (Cu) as a main component). ) Is lower than the melting point.

バスバ４０において、接続部４１は、複数の接続部４２の各々と、対応する溶断部４３を介して接続されている。換言すると、バッテリと各種外部負荷とは、対応する溶断部４３を介して電気的に接続される。 In the bus bar 40, the connecting portion 41 is connected to each of the plurality of connecting portions 42 via the corresponding fusing portion 43. In other words, the battery and various external loads are electrically connected via the corresponding fusing section 43.

バスバ４０は、定格電流を超える大きさの電流が流れたときに、ジュール熱を利用して溶断部４３が溶断されるように設計されている。溶断部４３が溶断されると、溶断した溶断部４３と接続されている接続部４２と、接続部４１との電気的接続が断たれる。 The bus bar 40 is designed so that the fusing portion 43 is blown by utilizing Joule heat when a current larger than the rated current flows. When the fusing part 43 is blown, the electrical connection between the connecting part 42 connected to the fusing part 43 and the connecting part 41 is cut off.

なお、各溶断部４３の溶断原理は、以下のとおりである。溶断部４３に定格電流を超える大きさの電流が流れると、その際に溶断部４３に生じる発熱（ジュール熱）により溶断部４３の温度が低融点体５０の融点に達することで、低融点体５０が溶断部４３よりも先に溶融する。溶融した（液相の）低融点体５０が溶断部４３に接触すると、溶断部４３そのものは未だ融点に達していなくても、溶断部４３を構成する金属材料が低融点体５０の中に拡散する。この拡散によって溶断部４３が徐々に侵食されて、溶断部４３が切断（溶断）される。上述した溶断原理から、低融点体５０が載置されている箇所の溶断部４３の温度が低融点体５０の融点に達した時点にて（溶断部４３の融点に達していなくても）、溶断部４３を溶断させられることになる。これにより、ヒューズエレメント１０をより実用的な温度（低融点体５０の融点）にて溶断させられる。 The fusing principle of each fusing portion 43 is as follows. When a current exceeding the rated current flows through the fusing section 43, the temperature of the fusing section 43 reaches the melting point of the low melting point body 50 due to the heat generated (Joule heat) generated in the fusing section 43 at that time, so that the low melting point body is formed. 50 melts before the fusing portion 43. When the molten (liquid phase) low melting point body 50 comes into contact with the fusing part 43, the metal material constituting the fusing part 43 diffuses into the low melting point body 50 even if the fusing part 43 itself has not reached the melting point yet. do. By this diffusion, the fusing portion 43 is gradually eroded, and the fusing portion 43 is cut (fused). From the above-mentioned fusing principle, when the temperature of the fusing portion 43 at the place where the low melting point body 50 is placed reaches the melting point of the low melting point body 50 (even if it does not reach the melting point of the fusing portion 43). The fusing portion 43 can be fusing. As a result, the fuse element 10 can be blown at a more practical temperature (melting point of the low melting point body 50).

次いで、カバー３０について説明する。カバー３０は、透明な樹脂材料からなる成形体である。カバー３０は、ハウジング２０の中央部２３に装着された状態にて、ヒューズユニット１の外部からヒューズエレメント１０の溶断部４３を視認できるように溶断部４３の周囲を覆って保護する機能を果たす（図１及び図３参照）。 Next, the cover 30 will be described. The cover 30 is a molded product made of a transparent resin material. The cover 30 has a function of covering and protecting the blown portion 43 of the fuse element 10 so that the blown portion 43 of the fuse element 10 can be visually recognized from the outside of the fuse unit 1 in a state of being mounted on the central portion 23 of the housing 20. (See FIGS. 1 and 3).

カバー３０は、図２に示すように、左右方向に延びて表裏方向に対向する一対の側壁部３１と、一対の側壁部３１の右端部同士を連結する連結部３２と、からなり、上下方向から見て左方に開口する略Ｕ字状の形状を有する。 As shown in FIG. 2, the cover 30 includes a pair of side wall portions 31 extending in the left-right direction and facing each other in the front-back direction, and a connecting portion 32 connecting the right end portions of the pair of side wall portions 31 in the vertical direction. It has a substantially U-shaped shape that opens to the left when viewed from the side.

左右方向に延びる各側壁部３１は、図２及び図３に示すように、上下方向に平行に延びる矩形平板状の平面部３３と、平面部３３の左右方向に延びる上側縁部に連続し且つ当該上側縁部から上方に向かうにつれて相手側の側壁部３１に近づくように上下方向に対して傾斜して延びる傾斜部３４と、で構成される。左右方向に延びる傾斜部３４は、上記のように上下方向に対して表裏方向内側に傾斜している限りにおいて、平板状の形状を有していても曲板状の形状を有していてもよい。 As shown in FIGS. 2 and 3, each side wall portion 31 extending in the left-right direction is continuous with a rectangular flat surface portion 33 extending in parallel in the vertical direction and an upper edge portion extending in the left-right direction of the flat surface portion 33. It is composed of an inclined portion 34 which is inclined in the vertical direction so as to approach the side wall portion 31 on the mating side as it goes upward from the upper edge portion. The inclined portion 34 extending in the left-right direction may have a flat plate shape or a curved plate shape as long as it is inclined inward in the front and back directions with respect to the vertical direction as described above. good.

各側壁部３１において、平面部３３の左右方向に延びる下側縁部が、側壁部３１の左右方向に延びる下側縁部を構成し、傾斜部３４の左右方向に延びる上側縁部が、側壁部３１の左右方向に延びる上側縁部を構成している。左右方向から見たとき、一対の側壁部３１に挟まれた空間の形状は、ハウジング２０の中央部２３の外形状に倣った形状となっている。 In each side wall portion 31, the lower edge portion extending in the left-right direction of the flat surface portion 33 constitutes the lower edge portion extending in the left-right direction of the side wall portion 31, and the upper edge portion extending in the left-right direction of the inclined portion 34 is the side wall portion. It constitutes an upper edge portion extending in the left-right direction of the portion 31. When viewed from the left and right, the shape of the space sandwiched between the pair of side wall portions 31 follows the outer shape of the central portion 23 of the housing 20.

一対の側壁部３１（より具体的には、一対の平面部３３）の左側端部には、一対の係合片３５が形成されている。以上、ヒューズユニット１を構成する各部材について説明した。 A pair of engaging pieces 35 are formed at the left end portions of the pair of side wall portions 31 (more specifically, the pair of flat surface portions 33). Each member constituting the fuse unit 1 has been described above.

カバー３０は、ハウジング２０の中央部２３に装着される。ハウジング２０の中央部２３にカバー３０を装着するためには、図２に示すように、中央部２３の右側にカバー３０を配置し、一対の側壁部３１が中央部２３に形成された複数の開口部２４を表裏両側から覆うように、中央部２３に対してカバー３０を左方へスライドさせる。このスライドは、カバー３０の一対の係合片３５が中央部２３の一対の係合部２５と係合するまで継続される。 The cover 30 is attached to the central portion 23 of the housing 20. In order to mount the cover 30 on the central portion 23 of the housing 20, as shown in FIG. 2, the cover 30 is arranged on the right side of the central portion 23, and a pair of side wall portions 31 are formed on the central portion 23. The cover 30 is slid to the left with respect to the central portion 23 so as to cover the opening 24 from both the front and back sides. This slide continues until the pair of engaging pieces 35 of the cover 30 engages with the pair of engaging portions 25 of the central portion 23.

一対の係合片３５が一対の係合部２５と係合すると、カバー３０のハウジング２０の中央部２３への装着が完了する（図１参照）。カバー３０のハウジング２０への装着状態では、ハウジング２０の複数の開口部２４が、表裏両側から、一対の側壁部３１によって覆われている。これにより、複数の溶断部４３が、ヒューズユニット１の外部から視認できるように、溶断部４３から離れた位置にてカバー３０によって覆われ且つ保護されている。一対の係合片３５と一対の係合部２５との係合により、カバー３０のハウジング２０に対する右方への移動（即ち、カバー３０の脱落）が防止されている。 When the pair of engaging pieces 35 engage with the pair of engaging portions 25, the mounting of the cover 30 to the central portion 23 of the housing 20 is completed (see FIG. 1). When the cover 30 is attached to the housing 20, the plurality of openings 24 of the housing 20 are covered by a pair of side wall portions 31 from both the front and back sides. As a result, the plurality of blown portions 43 are covered and protected by the cover 30 at a position away from the blown portions 43 so that they can be visually recognized from the outside of the fuse unit 1. The engagement of the pair of engaging pieces 35 and the pair of engaging portions 25 prevents the cover 30 from moving to the right with respect to the housing 20 (that is, the cover 30 falling off).

カバー３０のハウジング２０への装着状態では、図３に示すように、カバー３０の一対の側壁部３１（平面部３３＋傾斜部３４）同士が、バスバ４０を表裏方向に挟むように位置しており、一対の傾斜部３４は、バスバ４０の溶断部４３より上側に位置している。カバー３０の一対の平面部３３の表裏方向の長さ及びハウジング２０の下部２１の表裏方向の長さは、互いに一致しており、且つ、カバー３０の一対の傾斜部３４の表裏方向の長さ及びハウジング２０の上部２２の表裏方向の長さより長い。 In the mounted state of the cover 30 to the housing 20, as shown in FIG. 3, the pair of side wall portions 31 (flat surface portion 33 + inclined portion 34) of the cover 30 are positioned so as to sandwich the bus bar 40 in the front-back direction. The pair of inclined portions 34 are located above the fusing portion 43 of the bus cover 40. The length of the pair of flat surfaces 33 of the cover 30 in the front-back direction and the length of the lower portion 21 of the housing 20 in the front-back direction coincide with each other, and the length of the pair of inclined portions 34 of the cover 30 in the front-back direction. And the length of the upper portion 22 of the housing 20 in the front-back direction.

図３に示すように、溶断部４３における低融点体５０が載置されている複数箇所（本例では、左右方向に並ぶ３箇所）Ｐ１と、傾斜部３４の左右方向に延びる上側縁部Ｐ２と、を含む仮想平面Ｈ１を定義する。ここで、傾斜部３４の上側縁部Ｐ２とは、本例では、厳密には、傾斜部３４の上側縁の近傍であって、ハウジング２０の上部２２の下側角部の下側に隣接する部分であり、溶断部４３の視認可能範囲Ｒ（図４参照）の上側端を規定する部分である。このように仮想平面Ｈ１を定義したとき、ハウジング２０の上部２２の全体は、仮想平面Ｈ１より表裏方向の内側（即ち、バスバ４０側、図３中の矢印を参照）に位置している。 As shown in FIG. 3, a plurality of locations (in this example, three locations arranged in the left-right direction) P1 on which the low melting point body 50 is placed in the fusing portion 43, and an upper edge portion P2 extending in the left-right direction of the inclined portion 34. And, the virtual plane H1 including is defined. Here, the upper edge portion P2 of the inclined portion 34 is, strictly speaking, in the vicinity of the upper edge of the inclined portion 34 and adjacent to the lower side of the lower corner portion of the upper portion 22 of the housing 20. It is a portion that defines the upper end of the visible range R (see FIG. 4) of the fusing portion 43. When the virtual plane H1 is defined in this way, the entire upper portion 22 of the housing 20 is located inside the virtual plane H1 in the front-back direction (that is, the bus bar 40 side, see the arrow in FIG. 3).

カバー３０のハウジング２０への装着が完了した状態にあるヒューズユニット１は、図４に示すように、相手側部材（例えば、ヒューズボックス）の筐体６０の取付穴６１に挿入される。この挿入作業は、作業者がハウジング２０の上部２２を掴みながら行う。取付穴６１は、下方に窪み且つ上方に開口する、ハウジング２０の下部２１の形状に対応する形状を有する略直方体状の窪みである。 As shown in FIG. 4, the fuse unit 1 in which the cover 30 has been mounted on the housing 20 is inserted into the mounting hole 61 of the housing 60 of the mating member (for example, the fuse box). This insertion operation is performed while the operator grips the upper portion 22 of the housing 20. The mounting hole 61 is a substantially rectangular parallelepiped recess having a shape corresponding to the shape of the lower portion 21 of the housing 20 that is recessed downward and opens upward.

取付穴６１の底面には、ヒューズユニット１の複数の接続部４２を挿通させるための複数（本例では、３つ）の挿通孔（貫通孔）６２が、左右方向に並ぶように形成されており、取付穴６１は、複数の挿通孔６２を介して、複数（本例では、３つ）の端子収容孔６３と上下方向に連通している。 On the bottom surface of the mounting hole 61, a plurality of (three in this example) insertion holes (through holes) 62 for inserting the plurality of connection portions 42 of the fuse unit 1 are formed so as to be arranged in the left-right direction. The mounting holes 61 communicate with a plurality of (three in this example) terminal accommodating holes 63 in the vertical direction via the plurality of insertion holes 62.

図４に示すように、ヒューズユニット１の取付穴６１への挿入完了状態では、ハウジング２０の下部２１の下端面が取付穴６１の底面に当接し、複数の接続部４２が、それぞれ、複数の挿通孔６２を挿通して、複数の端子収容孔６３の内部に位置している。各端子収容孔６３には、対応する外部負荷から延びる電線の端末に設けられた端子（メス端子、図示省略）が収容される。これにより、各接続部４２が、対応する外部負荷と電気的に接続される。 As shown in FIG. 4, when the fuse unit 1 has been inserted into the mounting hole 61, the lower end surface of the lower portion 21 of the housing 20 comes into contact with the bottom surface of the mounting hole 61, and the plurality of connecting portions 42 each have a plurality of connecting portions 42. It is located inside a plurality of terminal accommodating holes 63 through the insertion holes 62. Each terminal accommodating hole 63 accommodates a terminal (female terminal, not shown) provided at the terminal of the electric wire extending from the corresponding external load. As a result, each connection portion 42 is electrically connected to the corresponding external load.

ヒューズユニット１の取付穴６１への挿入完了状態では、カバー３０の一対の平面部３３は取付穴６１の内壁面に向かい合って近接配置される。これに対し、一対の平面部３３から表裏方向内側に傾斜して延びる一対の傾斜部３４は、取付穴６１の内壁面に覆われた状態とはならない。即ち、カバー３０の一対の傾斜部３４を通じて、取付穴６１の開口の上方から溶断部４３を視認し得る。 When the fuse unit 1 has been inserted into the mounting hole 61, the pair of flat surfaces 33 of the cover 30 are arranged close to each other facing the inner wall surface of the mounting hole 61. On the other hand, the pair of inclined portions 34 extending inwardly in the front-back direction from the pair of flat portions 33 are not covered with the inner wall surface of the mounting hole 61. That is, the fusing portion 43 can be visually recognized from above the opening of the mounting hole 61 through the pair of inclined portions 34 of the cover 30.

具体的には、図４に示すように、上述した複数箇所Ｐ１と、取付穴６１の左右方向に延びる開口縁Ｐ３と、を含む仮想平面Ｈ２を定義すると、本例では、仮想平面Ｈ１と仮想平面Ｈ２とによって挟まれる範囲（視認可能範囲Ｒ）内の広範囲な角度から、カバー３０の一対の傾斜部３４を通じて溶断部４３を視認することができる。このとき、ハウジング２０の上部２２の全体が、仮想平面Ｈ１より表裏方向の内側（即ち、バスバ４０側）に位置しているため、ハウジング２０の上部２２が溶断部４３の視認の妨げとなることもない。 Specifically, as shown in FIG. 4, if the virtual plane H2 including the above-mentioned plurality of locations P1 and the opening edge P3 extending in the left-right direction of the mounting hole 61 is defined, in this example, the virtual plane H1 and the virtual plane H1 are defined. The fusing portion 43 can be visually recognized through the pair of inclined portions 34 of the cover 30 from a wide range of angles within the range (visible range R) sandwiched by the plane H2. At this time, since the entire upper portion 22 of the housing 20 is located inside the virtual plane H1 in the front-back direction (that is, the bus bar 40 side), the upper portion 22 of the housing 20 hinders the visibility of the fusing portion 43. Nor.

＜作用・効果＞
以上、本実施形態に係るヒューズユニット１によれば、バスバ４０の溶断部４３を覆う透明のカバー３０が、バスバ４０から離れるように延びる傾斜部３４と、傾斜部３４に連続する平面部３３と、を有する。ヒューズユニット１をヒューズボックス等の筐体６０の取付穴６１に挿入した場合、カバー３０の平面部３３は従来のヒューズユニットと同様に取付穴６１の内壁面に向かい合って近接配置されることになるものの、平面部３３から傾斜して延びる傾斜部３４は取付穴６１の内壁面に覆われた状態にならないため、傾斜部３４を通じて（例えば、取付穴６１の開口部の上方から）溶断部４３を視認し得る。更に、傾斜部３４とハウジング２０との接点（即ち、傾斜部３４の上側縁部Ｐ２）と、溶断部４３（低融点体５０が載置されている複数箇所Ｐ２）と、を含む仮想平面Ｈ１よりもハウジング２０がバスバ４０側にあるため、ハウジング２０が溶断部４３の視認の妨げとなることもない。したがって、本実施形態に係るヒューズユニット１は、従来のヒューズユニットに比べ、メンテナンス性に優れている。 <Action / effect>
As described above, according to the fuse unit 1 according to the present embodiment, the transparent cover 30 covering the blown portion 43 of the bus bar 40 has an inclined portion 34 extending away from the bus bar 40 and a flat surface portion 33 continuous with the inclined portion 34. , Have. When the fuse unit 1 is inserted into the mounting hole 61 of the housing 60 such as a fuse box, the flat surface portion 33 of the cover 30 is arranged close to the inner wall surface of the mounting hole 61 in the same manner as the conventional fuse unit. However, since the inclined portion 34 extending inclined from the flat surface portion 33 is not covered by the inner wall surface of the mounting hole 61, the fusing portion 43 is inserted through the inclined portion 34 (for example, from above the opening of the mounting hole 61). Can be seen. Further, a virtual plane H1 including a contact point between the inclined portion 34 and the housing 20 (that is, the upper edge portion P2 of the inclined portion 34) and a fusing portion 43 (a plurality of locations P2 on which the low melting point body 50 is placed). Since the housing 20 is closer to the bus bar 40 than the housing 20, the housing 20 does not interfere with the visibility of the fusing portion 43. Therefore, the fuse unit 1 according to the present embodiment is superior in maintainability as compared with the conventional fuse unit.

更に、本実施形態に係るヒューズユニット１によれば、カバー３０の傾斜部３４によってバスバ４０が挟まれる。そのため、傾斜部３４に対応した二方向から（具体的には、ヒューズユニット１の表側と裏側とから）溶断部４３の状態を視認して確認することができる。よって、本実施形態に係るヒューズユニット１は、更にメンテナンス性に優れる。 Further, according to the fuse unit 1 according to the present embodiment, the bus bar 40 is sandwiched by the inclined portion 34 of the cover 30. Therefore, the state of the blown portion 43 can be visually confirmed from the two directions corresponding to the inclined portion 34 (specifically, from the front side and the back side of the fuse unit 1). Therefore, the fuse unit 1 according to the present embodiment is further excellent in maintainability.

更に、本実施形態に係るヒューズユニット１によれば、カバー３０の傾斜部３４は、溶断部４３よりも、傾斜部３４とハウジング２０との接点（即ち、傾斜部３４の上側縁部Ｐ２）に近い側に配置される。そのため、傾斜部３４が無い場合（即ち、平面部３３が上側縁部Ｐ２にあたる箇所から下方に真っ直ぐに延びる場合）に比べ、溶断部４３と平面部３３との距離を大きくすることができる。その結果、通電時に特に高温になる溶断部４３が発する熱がカバー３０（特に平面部３３）に及ぼす影響を低減できる。更に、筐体６０の取付穴６１にヒューズユニット１が取り付けられた際、溶断部４３と作業者の視点との間にカバー３０の傾斜部３４が自然に配置されることになる。よって、ヒューズユニット１のメンテナンス性を更に向上できる。 Further, according to the fuse unit 1 according to the present embodiment, the inclined portion 34 of the cover 30 is located at the contact point between the inclined portion 34 and the housing 20 (that is, the upper edge portion P2 of the inclined portion 34) rather than the fusing portion 43. Placed on the near side. Therefore, the distance between the fusing portion 43 and the flat surface portion 33 can be increased as compared with the case where the flat surface portion 34 does not exist (that is, the flat surface portion 33 extends straight downward from the portion corresponding to the upper edge portion P2). As a result, it is possible to reduce the influence of the heat generated by the fusing portion 43, which becomes particularly hot when energized, on the cover 30 (particularly the flat portion 33). Further, when the fuse unit 1 is attached to the attachment hole 61 of the housing 60, the inclined portion 34 of the cover 30 is naturally arranged between the blown portion 43 and the viewpoint of the operator. Therefore, the maintainability of the fuse unit 1 can be further improved.

＜他の形態＞
なお、本発明は上記各実施形態に限定されることはなく、本発明の範囲内において種々の変形例を採用することができる。例えば、本発明は、上述した実施形態に限定されるものではなく、適宜、変形、改良、等が可能である。その他、上述した実施形態における各構成要素の材質、形状、寸法、数、配置箇所、等は本発明を達成できるものであれば任意であり、限定されない。 <Other forms>
The present invention is not limited to each of the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. In addition, the material, shape, dimensions, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

上記実施形態では、溶断部４３を収容するハウジング２０の複数の開口部２４が表裏方向に貫通しており、カバー３０の一対の側壁部３１が複数の開口部２４を表裏両側から覆うように、カバー３０がハウジング２０に装着される。これに対し、溶断部４３を収容するハウジング２０の複数の開口部２４が表裏方向の一側のみに開口しており、カバー３０が単一の側壁部３１を備え、カバー３０の単一の側壁部３１が複数の開口部２４の一側の開口を覆うように、カバー３０がハウジング２０に装着されてもよい。 In the above embodiment, the plurality of openings 24 of the housing 20 accommodating the fusing portion 43 penetrate in the front and back directions, and the pair of side wall portions 31 of the cover 30 cover the plurality of openings 24 from both the front and back sides. The cover 30 is attached to the housing 20. On the other hand, a plurality of openings 24 of the housing 20 accommodating the fusing portion 43 are opened only on one side in the front and back directions, the cover 30 includes a single side wall portion 31, and a single side wall of the cover 30. The cover 30 may be mounted on the housing 20 so that the portion 31 covers one side of the plurality of openings 24.

ここで、上述した本発明に係るヒューズユニット１の実施形態の特徴をそれぞれ以下［１］〜［３］に簡潔に纏めて列記する。
［１］
所定方向の一方側から他方側に延びる導電体（４０）と、前記導電体（４０）が有する溶断部（４３）と、前記溶断部（４３）が露出するように前記導電体（４０）が埋設されるハウジング（２０）と、前記ハウジング（２０）に取り付けられて露出した前記溶断部（４３）の周囲を覆う透明のカバー（３０）と、を備えたヒューズユニット（１）であって、
前記カバー（３０）は、
前記一方側から前記他方側に向かうにつれて前記導電体（４０）から離れるように延びる傾斜部（３４）と、
前記傾斜部（３４）に連続して前記他方側に向かうように延びる平面部（３３）と、を有し、
前記ハウジング（２０）は、
前記溶断部（Ｐ１）と前記傾斜部（３４）の前記一方側の端部（Ｐ２）とを含む仮想上の平面（Ｈ１）よりも前記導電体（４０）側に位置する、
ヒューズユニット（１）。
［２］
上記［１］に記載のヒューズユニット（１）において、
前記カバー（３０）の向かい合う前記傾斜部（３４）同士が前記導電体（４０）を挟むように位置する、
ヒューズユニット（１）。
［３］
上記［１］又は上記［２］に記載のヒューズユニット（１）において、
前記傾斜部（３４）は、前記溶断部（４３）よりも前記一方側に位置する、
ヒューズユニット（１）。 Here, the features of the above-described embodiment of the fuse unit 1 according to the present invention are briefly summarized and listed below in [1] to [3], respectively.
[1]
The conductor (40) extends from one side to the other side in a predetermined direction, the fusing portion (43) of the conductor (40), and the conductor (40) so as to expose the fusing portion (43). A fuse unit (1) including a housing (20) to be embedded and a transparent cover (30) that is attached to the housing (20) and covers the periphery of the exposed fusing portion (43).
The cover (30)
An inclined portion (34) extending away from the conductor (40) as it goes from one side to the other side.
It has a flat surface portion (33) that is continuous with the inclined portion (34) and extends toward the other side.
The housing (20) is
It is located on the conductor (40) side of the virtual plane (H1) including the fusing portion (P1) and the one-sided end portion (P2) of the inclined portion (34).
Fuse unit (1).
[2]
In the fuse unit (1) described in the above [1],
The inclined portions (34) facing each other of the cover (30) are located so as to sandwich the conductor (40).
Fuse unit (1).
[3]
In the fuse unit (1) according to the above [1] or the above [2],
The inclined portion (34) is located on one side of the fusing portion (43).
Fuse unit (1).

１ ヒューズユニット
２０ ハウジング
３０ カバー
３３ 平面部
３４ 傾斜部
４０ バスバ（導電体）
４３ 溶断部
Ｈ１ 仮想平面（仮想上の平面）
Ｐ１ 低融点体５０が載置されている複数箇所（溶断部）
Ｐ２ 傾斜部３４の上側縁部（傾斜部の一方側の端部） 1 Fuse unit 20 Housing 30 Cover 33 Flat part 34 Inclined part 40 Bus bar (conductor)
43 Fusing part H1 virtual plane (virtual plane)
Multiple locations where the P1 low melting point body 50 is placed (fused portion)
Upper edge of P2 inclined portion 34 (one end of inclined portion)

Claims (3)

所定方向の一方側から他方側に延びる導電体と、前記導電体が有する溶断部と、前記溶断部が露出するように前記導電体が埋設されるハウジングと、前記ハウジングに取り付けられて露出した前記溶断部の周囲を覆う透明のカバーと、を備えたヒューズユニットであって、
前記カバーは、
前記一方側から前記他方側に向かうにつれて前記導電体から離れるように延びる傾斜部と、
前記傾斜部に連続して前記他方側に向かうように延びる平面部と、を有し、
前記ハウジングは、
前記溶断部と前記傾斜部の前記一方側の端部とを含む仮想上の平面よりも前記導電体側に位置する、
ヒューズユニット。 A conductor extending from one side to the other side in a predetermined direction, a fusing portion of the conductor, a housing in which the conductor is embedded so that the fusing portion is exposed, and a housing attached to the housing and exposed. A fuse unit equipped with a transparent cover that covers the periphery of the blown part.
The cover is
An inclined portion extending away from the conductor as it goes from one side to the other side,
It has a flat surface portion that is continuous with the inclined portion and extends toward the other side.
The housing is
Located on the conductor side of the virtual plane including the fusing portion and the one-sided end of the inclined portion.
Fuse unit. 請求項１に記載のヒューズユニットにおいて、
前記カバーの向かい合う前記傾斜部同士が前記導電体を挟むように位置する、
ヒューズユニット。 In the fuse unit according to claim 1,
The inclined portions of the cover facing each other are located so as to sandwich the conductor.
Fuse unit. 請求項１又は請求項２に記載のヒューズユニットにおいて、
前記傾斜部は、前記溶断部よりも前記一方側に位置する、
ヒューズユニット。 In the fuse unit according to claim 1 or 2.
The inclined portion is located on one side of the fusing portion.
Fuse unit.
JP2020069248A 2020-04-07 2020-04-07 Fuse unit Active JP7041185B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2020069248A JP7041185B2 (en) 2020-04-07 2020-04-07 Fuse unit
DE102021107581.5A DE102021107581A1 (en) 2020-04-07 2021-03-25 Fuse unit
FR2103379A FR3109015B1 (en) 2020-04-07 2021-04-01 FUSE UNIT
CN202110372474.9A CN113496858B (en) 2020-04-07 2021-04-07 Fuse unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020069248A JP7041185B2 (en) 2020-04-07 2020-04-07 Fuse unit

Publications (2)

Publication Number Publication Date
JP2021166160A true JP2021166160A (en) 2021-10-14
JP7041185B2 JP7041185B2 (en) 2022-03-23

Family

ID=77749726

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020069248A Active JP7041185B2 (en) 2020-04-07 2020-04-07 Fuse unit

Country Status (4)

Country Link
JP (1) JP7041185B2 (en)
CN (1) CN113496858B (en)
DE (1) DE102021107581A1 (en)
FR (1) FR3109015B1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010062085A (en) * 2008-09-05 2010-03-18 Yazaki Corp Composite type fusible link, fuse box, and its manufacturing method
JP2011253679A (en) * 2010-06-01 2011-12-15 Yazaki Corp Fuse unit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5771057B2 (en) * 2011-04-22 2015-08-26 矢崎総業株式会社 fuse
JP6212317B2 (en) 2013-07-25 2017-10-11 矢崎総業株式会社 Fuse and method for adjusting fusing characteristics of fuse
DE202017104268U1 (en) * 2017-07-18 2018-07-20 HKR Seuffer Automotive GmbH & Co. KG fuse element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010062085A (en) * 2008-09-05 2010-03-18 Yazaki Corp Composite type fusible link, fuse box, and its manufacturing method
JP2011253679A (en) * 2010-06-01 2011-12-15 Yazaki Corp Fuse unit

Also Published As

Publication number Publication date
CN113496858B (en) 2024-05-31
JP7041185B2 (en) 2022-03-23
FR3109015A1 (en) 2021-10-08
DE102021107581A1 (en) 2021-10-07
CN113496858A (en) 2021-10-12
FR3109015B1 (en) 2023-04-07

Similar Documents

Publication Publication Date Title
US7592892B2 (en) Fusible link unit accommodated in in-vehicle electrical connection box
CN103493170B (en) Fuse
KR101370196B1 (en) Fusible link unit
JP6581958B2 (en) Voltage detection structure and voltage detection module
JP2018097987A (en) Connection structure of conductor and conductive module
US7713070B2 (en) Electric connection box
JP5187941B2 (en) Electrical junction box
JP7041185B2 (en) Fuse unit
JP6575767B2 (en) Intermittent structure of fuse for dark current circuit
JP4306602B2 (en) Electrical junction box
JP2018026310A (en) Fuse unit
JP6034665B2 (en) Electrical junction box
KR20110107169A (en) Multi fuse
JP2020155308A (en) Joint connector
JP5264373B2 (en) Fuse block
KR102644817B1 (en) Fuse, and method of manufacturing the fuse
US10283305B2 (en) Fuse
JP7412035B1 (en) Fuse and method for manufacturing the fuse
JP7123482B2 (en) fusible link unit
JP6774265B2 (en) Electrical junction box
JP4184944B2 (en) Electrical junction box
JP6212347B2 (en) Electrical connection device
JP4029588B2 (en) Electrical junction box for automobiles
JP4163592B2 (en) Fuse unit
JP2024083767A (en) fuse

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20210617

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20220225

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20220308

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20220310

R150 Certificate of patent or registration of utility model

Ref document number: 7041185

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350