JP3722421B2 - Fuse box - Google Patents

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JP3722421B2
JP3722421B2 JP2001108936A JP2001108936A JP3722421B2 JP 3722421 B2 JP3722421 B2 JP 3722421B2 JP 2001108936 A JP2001108936 A JP 2001108936A JP 2001108936 A JP2001108936 A JP 2001108936A JP 3722421 B2 JP3722421 B2 JP 3722421B2
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fuse
terminal
insulating housing
mounting portion
fusible
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JP2001351502A (en
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隆吉 遠藤
紀弘 大橋
映次 下地
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Yazaki Corp
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Yazaki Corp
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Description

【0001】
【発明の属する技術分野】
本発明はヒューズボックスに関し、特に、一対の平行な平板端子部の間に可溶部が設けられたヒューズエレメントを絶縁ハウジング内に組付けてなるブレード型ヒューズが装着されるヒューズボックスに関する。
【0002】
【従来の技術】
図7に示した従来のヒューズ50は、一対の平行な金属平板端子(以下、平板端子と云う)51,51の間に可溶部52を設けることでヒューズエレメント56を構成し、該ヒューズエレメント56の基端側(可溶部52を設けた一端側)を絶縁ハウジング53内に収容したブレード型ヒューズである。
【0003】
前記平板端子51は、それぞれ絶縁ハウジング53内に収容される端子本体54と、該絶縁ハウジング53から外方(図7中、下方)に大きく突出するタブ端子部55とから成る。
又、前記可溶部52は、これら平板端子51,51の対向する内側縁54a,54aの間に横架するように、所定の断面積をもって設けられている。
【0004】
そして、ヒューズボックスのヒューズ装着部60は、図8に示したように、相手側端子61が該ヒューズ装着部60に装着された前記ヒューズ50のタブ端子部55を挟持固定することにより、電気的に接続する。
尚、前記相手側端子61は、図9に示したように、例えばバスバーの一端部に端子片を形成すると共に、該端子片の伸延方向に沿って穿設したU字形スロット61bにより先割れした前記端子片の上端を互いに内側に向けて膨出させて一対の挟持部61a,61aを形成した所謂、音叉形接続端子である。
【0005】
【発明が解決しようとする課題】
ところが、前記ヒューズ装着部60は、相手側端子61が前記ヒューズ50のタブ端子部55の部分(各平板端子51の図9中下方部分)を支持固定しただけでは、該ヒューズ50の支持バランスが良くない。
そこで、前記ヒューズ装着部60には、装着時の挿入案内と共に装着後のヒューズ50のブレ等を防止する為、図8に示したように、前記絶縁ハウジング53を支持するヒューズガイド壁62を設けなければならない。
【0006】
又、前記ヒューズ装着部60には、装着された前記ヒューズ50のタブ端子部55,55の間の電流リークを防止する為、絶縁壁63が設けられている。該絶縁壁63は、絶縁ハウジング53から外方に大きく突出しているタブ端子部55,55の長手方向に沿って十分な高さ寸法が必要である。尚、前記絶縁壁63の上端は、絶縁ハウジング53の下端縁と当接することで、ヒューズ装着部60に対するヒューズ50の位置決めを行なっている。
【0007】
従って、前記ヒューズ装着部60は、これらヒューズガイド壁62や絶縁壁63により、ヒューズ装着方向に沿った高さ寸法が大きくなり、ヒューズボックス等の大型化を招くという問題があった。また、前記ヒューズガイド壁62は、ヒューズ50のブレを防止する為に高い成形精度が要求される。
【0008】
また、前記ヒューズ装着部60に前記ヒューズ50が装着される際には、前記ヒューズガイド壁62や絶縁壁63に囲まれた奥深い底部に位置する相手側端子61の挟持部61a,61aにタブ端子部55を挟持させねばならず、挿入作業性も良くなかった。
【0009】
従って、本発明の目的は上記課題を解消することに係り、ヒューズ装着部での支持バランスを高めると共にヒューズ装着部を小型化でき、挿入作業性を向上できる良好なヒューズボックスを提供することである。
【0010】
【課題を解決するための手段】
本発明の上記目的は、一対の平行な平板端子部の内側縁の間に可溶部が設けられたヒューズエレメントと、各平板端子部の内側縁及び上端縁及び前記可溶部を覆う略T字状の絶縁ハウジングとを備えたヒューズが装着されヒューズ装着部を有するヒューズボックスであって、
前記ヒューズ装着部の相手側端子が、前記各平板端子部の装着方向における中間部位を板厚方向から挟持固定することにより、電気的に接続し、
前記ヒューズ装着部が、装着された前記ヒューズの絶縁ハウジングを支持するヒューズガイド壁と、前記相手側端子間の電流リークを防止する絶縁壁とを備えると共に、前記絶縁壁がこれら相手側端子よりも低い高さとされることを特徴とするヒューズボックスにより達成される。
【0011】
又、本発明の上記目的は、一対の平行な平板端子部の内側縁の間に可溶部が設けられたヒューズエレメントと、各平板端子部の内側縁及び上端縁及び前記可溶部を覆う略T字状の絶縁ハウジングとを備えたヒューズが装着されヒューズ装着部を有するヒューズボックスであって、
前記ヒューズ装着部の相手側端子が、前記可溶部の側方に位置する前記各平板端子部の中間部位を板厚方向から挟持固定し、
前記ヒューズ装着部が、装着された前記ヒューズの絶縁ハウジングを支持するヒューズガイド壁と、前記相手側端子間の電流リークを防止する絶縁壁とを備えると共に、前記絶縁壁がこれら相手側端子よりも低い高さとされることを特徴とするヒューズボックスにより達成される。
【0012】
上記構成によれば、ヒューズ装着部の相手側端子が、内側縁及び上端縁及び可溶部が略T字状の絶縁ハウジングで覆われるヒューズエレメントの各平板端子部の装着方向における中間部位を板厚方向から挟持固定するので、相手側端子が絶縁ハウジングから突出したヒューズのタブ部分を支持固定する従来のヒューズボックスに比べて、ヒューズ装着部でのヒューズの支持バランスが良くなり、装着後のヒューズのブレを抑制できると共に、ヒューズ自体の全高を低くできる。
【0013】
又、上記構成によれば、ヒューズ装着部が、装着されたヒューズの絶縁ハウジングを支持するヒューズガイド壁と、相手側端子間の電流リークを防止する絶縁壁とを備えると共に、絶縁壁がこれら相手側端子よりも低い高さとされるので、ヒューズ装着部には、ヒューズのブレ等を防止する為の高い成形精度のヒューズガイド壁が必要なくなり、ヒューズガイド壁及び絶縁壁の高さを従来よりも低くできる。従って、ヒューズ装着部を小型化できると共に、ヒューズの挿入作業性を向上させることができる。
【0014】
更に、ヒューズ装着部の相手側端子が、前記可溶部の側方に位置する前記各平板端子部の中間部位を板厚方向から挟持固定する場合には、前記各平板端子部の装着方向に沿った略中央部分を前記相手側端子が板厚方向から挟持固定することで、ヒューズ装着部の支持バランスがより一層良くなる。
【0015】
尚、好ましくは前記ヒューズ装着部の相手側端子が、前記絶縁ハウジングの位置決め用当接部と当接することによってヒューズの挿入位置決めを行なう。
この場合、相手側端子はヒューズを直接位置決めするので、ヒューズ装着部の絶縁壁等との間で位置決めを行なう必要がなく、ヒューズ装着部の成形精度に関わらず正確な位置決めを行なうことができる。
【0016】
らに又、好ましくは前記ヒューズ装着部に装着されたヒューズを取り外す為のヒューズ抜取り治具が係合する治具係合用段部が、前記絶縁ハウジングにおける各平板端子部の上端縁を覆う部位に設けられていることを特徴とする。
【0017】
【発明の実施の形態】
以下、添付図面に基づいて本発明の一実施形態に係るヒューズボックスを詳細に説明する。
図1は本発明の一実施形態に係るヒューズボックスのヒューズ装着部に装着されるヒューズを示す分解斜視図、図2は図1に示したヒューズの正面図、図3及び図4は図1に示したヒューズをヒューズ装着部に装着した状態を示す正面図及び側面図である。
【0018】
本実施形態に係るヒューズボックスのヒューズ装着部10(図3、参照)に装着されるヒューズ20は、一対の平行な平板端子部21,21の間に可溶部22が設けられたヒューズエレメント25を絶縁ハウジング23内に組付けてなるブレード型ヒューズである。
前記各平板端子部21は、それぞれ略矩形状を有しており、これら平板端子部21,21の対向する内側縁21a,21aの間に横架するように、前記可溶部22が所定の断面積をもって設けられている。
【0019】
前記絶縁ハウジング23は、略T字状を有する一対のハウジング部材24,24からなり、前記ヒューズエレメント25を板厚方向から挟むようにして一体に結合され、溶着固定される。各ハウジング部材24の内壁面には、それぞれ大小一対のピン24a,24aが突設されており、各平板端子部21にそれぞれ設けられた貫通孔21bを貫通した後に、各ピン24aが対峙する各ハウジング部材24の内壁面に穿設された嵌合孔24bに嵌合される。
【0020】
これにより前記ヒューズエレメント25に取付けられた絶縁ハウジング23が、可溶部22と共に各平板端子部21の内側縁21a及び上端縁21cを覆う。そこで、ヒューズエレメント25は、図2に示したように、各平板端子部21の外側縁21d及び下端縁21eから前記可溶部22の側方に位置する中間部位21fにかけての表裏面領域以外が絶縁ハウジング23に覆われる。
そして、後述するヒューズ装着部10の相手側端子11が、前記各平板端子部21の中間部位21fを板厚方向から挟持固定することにより、該相手側端子11に電気的に接続される(図3、参照)。
【0021】
更に、前記絶縁ハウジング23における各平板端子部21の上端縁21cを覆う部位には、位置決め用当接部24c及び治具係合用段部24dが設けられている。
前記位置決め用当接部24cは、前記ヒューズ装着部10へのヒューズ20の装着に伴って、相手側端子11の上端部が当接することによって、該ヒューズ20の挿入位置決めを行なうものである(図3及び図4、参照)。
前記治具係合用段部24dは、ヒューズ装着部10に装着されたヒューズ20を取り外す際、ヒューズ抜取り治具(図示しない)が係合する部分である。
【0022】
即ち、前記ヒューズ20によれば、図2に示したように、可溶部22と共に各平板端子部21の内側縁21a及び上端縁21cが絶縁ハウジング23で覆われることで、ヒューズエレメント25は、図7に示した従来のヒューズ50におけるタブ端子部55のように、絶縁ハウジング23から外方に大きく突出するタブ端子部がなくなり、ヒューズ20自体が正面視略矩形状となる。
【0023】
そこで、絶縁ハウジング23から突出するタブ端子部がない前記ヒューズエレメント25は、搬送時等に複数のヒューズ20同士が接触する様な場合でも互いに接触し難く、他の部材との接触による外力も受け難いので、平板端子部21自体が傷ついたり、可溶部22に外力を加えて変形或いは破損させるのを防止できる。
尚、万が一、平板端子部21の外側縁21d又は下端縁21eが他の部材に接触して外力を受けても、該平板端子部21は各ハウジング部材24のピン24aに貫通支持されているので、可溶部22には直接的に外力が加わり難い。
【0024】
そして、前記ヒューズ20は、図3及び図4に示したように、本実施形態に係るヒューズボックスのヒューズ装着部10に装着され、該ヒューズ装着部10の相手側端子11が、前記各平板端子部21の中間部位21fを板厚方向から挟持固定することにより、該相手側端子11に電気的に接続される。
尚、前記相手側端子11は、図4に示したように、例えばバスバーの一端部に端子片を形成すると共に、該端子片の伸延方向に沿って穿設したU字形スロット11bにより先割れした前記端子片の上端を互いに内側に向けて膨出させて一対の挟持部11a,11aを形成した所謂、音叉形接続端子である。
【0025】
即ち、本実施形態のヒューズボックスにおけるヒューズ装着部10の相手側端子11は、前記ヒューズエレメント25の平板端子部21,21の装着方向(図中、上下方向)に沿った略中央部分である中間部位21f,21fを板厚方向から挟持固定するので、図8及び図9に示した相手側端子61,61が絶縁ハウジング53から突出したヒューズ50のタブ端子部55を支持固定する従来のヒューズボックスのヒューズ装着部60に比べて、ヒューズ装着部10でのヒューズ20の支持バランスが良くなり、装着後のヒューズ20のブレを抑制できると共に、ヒューズ20自体の全高を低くできる。
【0026】
そこで、図3に示したヒューズ装着部10のヒューズガイド壁13には、ヒューズ20のブレ等を防止する為の高い成形精度が必要なくなり、ヒューズガイド壁13自体の高さも低くできる。
又、前記ヒューズ装着部10に装着されたヒューズ20の平板端子部21,21間の電流リークは、絶縁ハウジング23により防止される。そこで、ヒューズ装着部10の絶縁壁12は、一対の相手側端子11,11間を電気的に絶縁すれば良く、図8に示した絶縁壁63に比べて高さ寸法を小さくできる。
従って、ヒューズ装着部10を小型化できると共に、ヒューズ20の挿入作業性を向上させることができる。
【0027】
更に、前記ヒューズ装着部10の相手側端子11は、前記各平板端子部21の上端縁21cを覆う絶縁ハウジング23の位置決め用当接部24cと上端部が当接することによってヒューズ20の挿入位置決めを行なう。
そこで、前記相手側端子11はヒューズ20を直接位置決めするので、ヒューズ装着部10の絶縁壁12等との間で位置決めを行なう必要がなく、ヒューズ装着部10の成形精度に関わらず正確な位置決めを行なうことができる。
【0028】
従って、本実施形態のヒューズボックスにおけるヒューズ装着部10は、小型化されると共に高い成形精度を要求されないので、挿入し易くなったヒューズ20の挿入作業性が向上すると共に、製造コストを削減できる。
【0029】
尚、本発明のヒューズボックスのヒューズ装着部10に装着されるヒューズにおけるヒューズエレメント及び絶縁ハウジングの構成は、上記実施形態におけるヒューズの構成に限定されるものではなく、種々の形態を採りうることは云うまでもない。
例えば、図5に示したヒューズの変形例におけるヒューズ30では、ヒューズエレメント35に取付けられた絶縁ハウジング33が、可溶部32と共に各平板端子部31の内側縁31a、上端縁31c、及び外側縁31dを覆っている。
【0030】
そこで、ヒューズエレメント35は、各平板端子部31の下端縁31eから前記可溶部32の側方に位置する中間部位31fにかけての表裏面領域以外が絶縁ハウジング33に覆われる。
そして、前記ヒューズ30は、前記ヒューズ装着部10の相手側端子11が、前記各平板端子部31の中間部位31fを板厚方向から挟持固定することにより、該相手側端子11に電気的に接続される。
【0031】
即ち、図5に示したヒューズ30のヒューズエレメント35は、露出が必要最小限とされるので、更に確実に傷つきの防止及び可溶部32の保護を達成することができる。その他の構成及び作用効果については、上記ヒューズ20と同様である。
【0032】
又、図6に示したヒューズの他の変形例におけるヒューズ40では、ヒューズエレメント45に取付けられた絶縁ハウジング43が、可溶部42と共に各平板端子部41の内側縁41aのみを覆っており、各平板端子部41の上端縁41c及び下端縁41eから前記可溶部42の側方に位置する中間部位41fにかけての表裏面領域が、絶縁ハウジング43から露出している。
【0033】
即ち、前記ヒューズ40は、ヒューズ装着部10に対して、上下いずれの方向からでも装着可能であり、ヒューズの装着作業性を向上させることができる。その他の構成及び作用効果については、上記ヒューズ20と略同様である。
【0034】
尚、上記実施形態においては、ヒューズ装着部10の相手側端子11が、前記各平板端子部21(31,41)の可溶部22(32,42)の側方に位置する中間部位21f(31f,41f)を板厚方向から挟持固定しているが、本発明はこれに限定されるものではなく、ヒューズの構成に応じて、絶縁ハウジングから露出している平板端子部の装着方向における中間部位を適宜挟持固定することができる。
【0035】
【発明の効果】
上述した如き本発明のヒューズボックスによれば、ヒューズ装着部の相手側端子が、内側縁及び上端縁及び可溶部が略T字状の絶縁ハウジングで覆われるヒューズエレメントの各平板端子部の装着方向における中間部位を板厚方向から挟持固定するので、相手側端子が絶縁ハウジングから突出したヒューズのタブ部分を支持固定する従来のヒューズボックスに比べて、ヒューズ装着部でのヒューズの支持バランスが良くなり、装着後のヒューズのブレを抑制できると共に、ヒューズ自体の全高を低くできる。
【0036】
又、上述した如き本発明のヒューズボックスによれば、ヒューズ装着部が、装着されたヒューズの絶縁ハウジングを支持するヒューズガイド壁と、相手側端子間の電流リークを防止する絶縁壁とを備えると共に、絶縁壁がこれら相手側端子よりも低い高さとされるので、ヒューズ装着部には、ヒューズのブレ等を防止する為の高い成形精度のヒューズガイド壁が必要なくなり、ヒューズガイド壁及び絶縁壁の高さを従来よりも低くできる。従って、ヒューズ装着部を小型化できると共に、ヒューズの挿入作業性を向上させることができる。
【図面の簡単な説明】
【図1】本発明の一実施形態に係るヒューズボックスのヒューズ装着部に装着されるヒューズを示す分解斜視図である。
【図2】図1に示したヒューズの正面図である。
【図3】図1に示したヒューズをヒューズ装着部に装着した状態を示す正面図である。
【図4】図1に示したヒューズをヒューズ装着部に装着した状態を示す側面図である。
【図5】本発明の一実施形態に係るヒューズボックスのヒューズ装着部に装着されるヒューズの変形例を示す正面図である。
【図6】本発明の一実施形態に係るヒューズボックスのヒューズ装着部に装着されるヒューズの他の変形例を示す正面図である。
【図7】従来のヒューズボックスのヒューズ装着部に装着されるヒューズを示す正面図である。
【図8】図7に示したヒューズをヒューズ装着部に装着した状態を示す正面図である。
【図9】図7に示したヒューズをヒューズ装着部に装着した状態を示す側面図である。
【符号の説明】
10 ヒューズ装着部
11 相手側端子
20 ヒューズ
21 平板端子部
21a 内側縁
21c 上端縁
21d 外側縁
21e 下端縁
21f 中間部位
22 可溶部
23 絶縁ハウジング
24 ハウジング部材
25 ヒューズエレメント
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuse box, and more particularly, to a fuse box in which a blade type fuse in which a fuse element having a fusible portion provided between a pair of parallel flat terminal portions is assembled in an insulating housing is mounted.
[0002]
[Prior art]
The conventional fuse 50 shown in FIG. 7 comprises a fuse element 56 by providing a fusible portion 52 between a pair of parallel metal flat plate terminals (hereinafter referred to as flat plate terminals) 51, 51. This is a blade type fuse in which the base end side of 56 (one end side provided with the fusible portion 52) is accommodated in an insulating housing 53.
[0003]
Each of the flat terminals 51 includes a terminal main body 54 accommodated in the insulating housing 53 and a tab terminal portion 55 that largely protrudes outward (downward in FIG. 7) from the insulating housing 53.
Further, the fusible portion 52 is provided with a predetermined cross-sectional area so as to lie horizontally between the opposed inner edges 54a, 54a of the flat plate terminals 51, 51.
[0004]
As shown in FIG. 8, the fuse mounting portion 60 of the fuse box is electrically connected by clamping and fixing the tab terminal portion 55 of the fuse 50 attached to the fuse mounting portion 60 by the mating terminal 61. Connect to.
As shown in FIG. 9, the counterpart terminal 61 is formed with a terminal piece at one end of a bus bar, for example, and is cracked by a U-shaped slot 61b drilled along the extending direction of the terminal piece. This is a so-called tuning fork-type connection terminal in which the upper ends of the terminal pieces are bulged inwardly to form a pair of clamping portions 61a and 61a.
[0005]
[Problems to be solved by the invention]
However, in the fuse mounting portion 60, if the counterpart terminal 61 supports and fixes the portion of the tab terminal portion 55 of the fuse 50 (the lower portion of each plate terminal 51 in FIG. 9), the support balance of the fuse 50 is sufficient. Not good.
Therefore, the fuse mounting portion 60 is provided with a fuse guide wall 62 for supporting the insulating housing 53 as shown in FIG. There must be.
[0006]
The fuse mounting portion 60 is provided with an insulating wall 63 in order to prevent current leakage between the tab terminal portions 55 and 55 of the mounted fuse 50. The insulating wall 63 needs to have a sufficient height dimension along the longitudinal direction of the tab terminal portions 55, 55 projecting greatly outward from the insulating housing 53. The upper end of the insulating wall 63 is in contact with the lower end edge of the insulating housing 53 to position the fuse 50 with respect to the fuse mounting portion 60.
[0007]
Therefore, the fuse mounting part 60 has a problem that the fuse guide wall 62 and the insulating wall 63 increase the height along the fuse mounting direction, resulting in an increase in size of the fuse box and the like. Further, the fuse guide wall 62 is required to have a high molding accuracy in order to prevent the fuse 50 from blurring.
[0008]
When the fuse 50 is mounted on the fuse mounting portion 60, tab terminals are connected to the clamping portions 61a and 61a of the mating terminal 61 located at a deep bottom surrounded by the fuse guide wall 62 and the insulating wall 63. The part 55 had to be clamped, and the insertion workability was not good.
[0009]
Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a good fuse box that can increase the support balance in the fuse mounting portion, reduce the size of the fuse mounting portion, and improve the insertion workability. .
[0010]
[Means for Solving the Problems]
The above object of the present invention is to provide a fuse element in which a fusible part is provided between the inner edges of a pair of parallel flat terminal parts, and an approximately T that covers the inner and upper edges of each flat terminal part and the fusible part. A fuse box having a fuse mounting portion on which a fuse having a character-shaped insulating housing is mounted,
The counterpart terminal of the fuse mounting part is electrically connected by sandwiching and fixing an intermediate part in the mounting direction of each flat plate terminal part from the plate thickness direction ,
The fuse mounting portion includes a fuse guide wall that supports an insulating housing of the mounted fuse, and an insulating wall that prevents current leakage between the mating terminals, and the insulating wall is more than these mating terminals. This is achieved by a fuse box characterized by a low height .
[0011]
The above-mentioned object of the present invention covers a fuse element in which a fusible part is provided between the inner edges of a pair of parallel flat terminal parts, and the inner and upper edges of each flat terminal part and the fusible part. A fuse box having a fuse mounting portion to which a fuse having a substantially T-shaped insulating housing is mounted;
The mating terminal of the fuse mounting part sandwiches and fixes the intermediate part of each flat terminal part located on the side of the fusible part from the plate thickness direction ,
The fuse mounting portion includes a fuse guide wall that supports an insulating housing of the mounted fuse, and an insulating wall that prevents current leakage between the mating terminals, and the insulating wall is more than these mating terminals. This is achieved by a fuse box characterized by a low height .
[0012]
According to the above configuration, the mating terminal in the mounting direction of each flat terminal portion of the fuse element in which the other terminal of the fuse mounting portion is covered with the substantially T-shaped insulating housing on the inner edge, the upper edge, and the soluble portion is a plate. Since the pin is clamped and fixed from the thickness direction, the fuse support balance at the fuse mounting part is improved compared to the conventional fuse box where the mating terminal supports and fixes the tab portion of the fuse protruding from the insulating housing. Can be suppressed, and the overall height of the fuse itself can be lowered.
[0013]
According to the above configuration, the fuse mounting portion includes the fuse guide wall that supports the insulating housing of the mounted fuse, and the insulating wall that prevents current leakage between the mating terminals. Since the height is lower than the side terminal, the fuse mounting part does not require a high molding accuracy fuse guide wall to prevent fuse blurring, etc., and the height of the fuse guide wall and insulation wall is higher than before. Can be lowered. Therefore, it is possible to reduce the size of the fuse mounting part and improve the workability of inserting the fuse.
[0014]
Further, when the mating terminal of the fuse mounting part clamps and fixes the intermediate part of each flat terminal part located on the side of the fusible part from the plate thickness direction, it is in the mounting direction of each flat terminal part. By supporting and fixing the substantially central portion along the mating terminal from the plate thickness direction, the support balance of the fuse mounting portion is further improved.
[0015]
Preferably, the other terminal of the fuse mounting portion is in contact with the positioning contact portion of the insulating housing, thereby positioning the fuse.
In this case, since the counterpart terminal directly positions the fuse, it is not necessary to position it with the insulating wall of the fuse mounting portion, and accurate positioning can be performed regardless of the molding accuracy of the fuse mounting portion.
[0016]
Also the of et, site preferably jig engaging stepped portion jig extraction fuse for disconnecting the fuse mounted in the fuse mounting portion is engaged, which covers the upper edge of the flat terminal portions of the insulating housing It is provided in.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a fuse box according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is an exploded perspective view showing a fuse mounted on a fuse mounting portion of a fuse box according to an embodiment of the present invention, FIG. 2 is a front view of the fuse shown in FIG. 1, and FIGS. It is the front view and side view which show the state which mounted | wore the fuse shown to the fuse mounting part.
[0018]
The fuse 20 mounted on the fuse mounting portion 10 (see FIG. 3) of the fuse box according to the present embodiment has a fuse element 25 in which a fusible portion 22 is provided between a pair of parallel flat-plate terminal portions 21 and 21. This is a blade type fuse assembled in the insulating housing 23.
Each of the flat terminal portions 21 has a substantially rectangular shape, and the fusible portion 22 has a predetermined shape so as to be laid across between the opposing inner edges 21a and 21a of the flat terminal portions 21 and 21. It is provided with a cross-sectional area.
[0019]
The insulating housing 23 is composed of a pair of housing members 24, 24 having a substantially T-shape, and is integrally joined and fixed by welding so as to sandwich the fuse element 25 from the plate thickness direction. A pair of large and small pins 24a and 24a are projected from the inner wall surface of each housing member 24, and each pin 24a faces each other after passing through a through hole 21b provided in each flat plate terminal portion 21. The housing member 24 is fitted into a fitting hole 24b formed in the inner wall surface.
[0020]
As a result, the insulating housing 23 attached to the fuse element 25 covers the inner edge 21 a and the upper edge 21 c of each flat terminal portion 21 together with the fusible portion 22. Therefore, as shown in FIG. 2, the fuse element 25 has an area other than the front and back surfaces extending from the outer edge 21 d and the lower edge 21 e of each flat terminal portion 21 to the intermediate portion 21 f located on the side of the fusible portion 22. Covered by an insulating housing 23.
Then, a mating terminal 11 of the fuse mounting portion 10 to be described later is electrically connected to the mating terminal 11 by sandwiching and fixing the intermediate portion 21f of each flat plate terminal portion 21 from the plate thickness direction (see FIG. 3, see).
[0021]
Furthermore, a positioning contact portion 24c and a jig engagement step portion 24d are provided at a portion of the insulating housing 23 that covers the upper edge 21c of each flat terminal portion 21.
The positioning contact portion 24c performs insertion positioning of the fuse 20 by contacting the upper end portion of the mating terminal 11 as the fuse 20 is mounted on the fuse mounting portion 10 (FIG. 3 and FIG. 4).
The jig engaging step 24d is a portion with which a fuse removal jig (not shown) is engaged when the fuse 20 mounted on the fuse mounting section 10 is removed.
[0022]
That is, according to the fuse 20, as shown in FIG. 2, the inner edge 21a and the upper end edge 21c of each flat plate terminal portion 21 together with the fusible portion 22 are covered with the insulating housing 23. Like the tab terminal portion 55 in the conventional fuse 50 shown in FIG. 7, there is no tab terminal portion that protrudes greatly outward from the insulating housing 23, and the fuse 20 itself has a substantially rectangular shape in front view.
[0023]
Therefore, the fuse element 25 having no tab terminal portion protruding from the insulating housing 23 is difficult to contact with each other even when a plurality of fuses 20 are in contact with each other at the time of transportation or the like, and receives external force due to contact with other members. Since it is difficult, it is possible to prevent the flat terminal portion 21 itself from being damaged, or applying an external force to the fusible portion 22 to be deformed or damaged.
Even if the outer edge 21d or the lower edge 21e of the flat terminal portion 21 contacts other members and receives external force, the flat terminal portion 21 is supported by the pins 24a of the housing members 24. In addition, it is difficult for external force to be directly applied to the soluble portion 22.
[0024]
As shown in FIGS. 3 and 4, the fuse 20 is mounted on the fuse mounting portion 10 of the fuse box according to the present embodiment, and the mating terminal 11 of the fuse mounting portion 10 is connected to each flat plate terminal. The intermediate portion 21f of the portion 21 is electrically connected to the mating terminal 11 by sandwiching and fixing the intermediate portion 21f from the plate thickness direction.
As shown in FIG. 4, the counterpart terminal 11 is formed with a terminal piece at one end of a bus bar, for example, and is cracked by a U-shaped slot 11b drilled along the extending direction of the terminal piece. This is a so-called tuning fork connection terminal in which the upper ends of the terminal pieces bulge toward each other to form a pair of sandwiching portions 11a and 11a.
[0025]
That is, the counterpart terminal 11 of the fuse mounting portion 10 in the fuse box of this embodiment is an intermediate portion that is a substantially central portion along the mounting direction (vertical direction in the drawing) of the flat plate terminal portions 21 and 21 of the fuse element 25. Since the parts 21f and 21f are sandwiched and fixed from the plate thickness direction, the conventional fuse box in which the mating terminals 61 and 61 shown in FIGS. 8 and 9 support and fix the tab terminal portion 55 of the fuse 50 protruding from the insulating housing 53. Compared with the fuse mounting portion 60, the balance of the support of the fuse 20 in the fuse mounting portion 10 is improved, so that blurring of the fuse 20 after mounting can be suppressed and the overall height of the fuse 20 itself can be lowered.
[0026]
Therefore, the fuse guide wall 13 of the fuse mounting portion 10 shown in FIG. 3 does not require a high molding accuracy for preventing the blur of the fuse 20, and the height of the fuse guide wall 13 itself can be reduced.
In addition, current leakage between the flat plate terminal portions 21 and 21 of the fuse 20 mounted on the fuse mounting portion 10 is prevented by the insulating housing 23. Therefore, the insulating wall 12 of the fuse mounting portion 10 only needs to electrically insulate between the pair of mating terminals 11 and 11, and the height dimension can be reduced as compared with the insulating wall 63 shown in FIG.
Therefore, the fuse mounting part 10 can be reduced in size, and the insertion workability of the fuse 20 can be improved.
[0027]
Further, the mating terminal 11 of the fuse mounting portion 10 positions the fuse 20 by contacting the positioning contact portion 24c of the insulating housing 23 covering the upper edge 21c of each flat plate terminal portion 21 and the upper end portion. Do.
Therefore, since the counterpart terminal 11 directly positions the fuse 20, it is not necessary to position the fuse 20 with the insulating wall 12 or the like of the fuse mounting portion 10, and accurate positioning is possible regardless of the molding accuracy of the fuse mounting portion 10. Can be done.
[0028]
Therefore, since the fuse mounting portion 10 in the fuse box of the present embodiment is downsized and does not require high molding accuracy, the insertion workability of the fuse 20 that is easy to insert is improved and the manufacturing cost can be reduced.
[0029]
The configuration of the fuse element and the insulating housing in the fuse mounted on the fuse mounting portion 10 of the fuse box of the present invention is not limited to the configuration of the fuse in the above embodiment, and can take various forms. Needless to say.
For example, in the fuse 30 in the modified example of the fuse shown in FIG. 5, the insulating housing 33 attached to the fuse element 35 includes the inner edge 31 a, the upper edge 31 c, and the outer edge of each plate terminal portion 31 together with the fusible portion 32. 31d is covered.
[0030]
Therefore, the fuse element 35 is covered by the insulating housing 33 except for the front and back regions from the lower end edge 31e of each flat terminal portion 31 to the intermediate portion 31f located on the side of the fusible portion 32.
The fuse 30 is electrically connected to the mating terminal 11 by the mating terminal 11 of the fuse mounting portion 10 holding and fixing the intermediate portion 31f of each flat plate terminal portion 31 from the plate thickness direction. Is done.
[0031]
That is, since the exposure of the fuse element 35 of the fuse 30 shown in FIG. 5 is minimized, it is possible to more reliably prevent damage and protect the fusible portion 32. Other configurations and operational effects are the same as those of the fuse 20 described above.
[0032]
Further, in the fuse 40 in another modification of the fuse shown in FIG. 6, the insulating housing 43 attached to the fuse element 45 covers only the inner edge 41 a of each flat terminal portion 41 together with the fusible portion 42. Front and back regions from the upper end edge 41 c and the lower end edge 41 e of each flat terminal portion 41 to the intermediate portion 41 f located on the side of the fusible portion 42 are exposed from the insulating housing 43.
[0033]
That is, the fuse 40 can be mounted on the fuse mounting portion 10 from either the upper or lower direction, and the fuse mounting workability can be improved. Other configurations and operational effects are substantially the same as those of the fuse 20.
[0034]
In addition, in the said embodiment, the intermediate | middle site | part 21f (positioning the side terminal 11 of the fuse mounting part 10 located in the side of the soluble part 22 (32, 42) of each said flat terminal part 21 (31, 41). 31f, 41f) are clamped and fixed from the plate thickness direction, but the present invention is not limited to this, and depending on the configuration of the fuse, the intermediate in the mounting direction of the flat plate terminal portion exposed from the insulating housing The part can be appropriately clamped and fixed.
[0035]
【The invention's effect】
According to the fuse box of the present invention as described above, the mating terminal of the fuse mounting portion is mounted on each flat terminal portion of the fuse element whose inner edge, upper edge and fusible portion are covered with a substantially T-shaped insulating housing. Since the intermediate part in the direction is sandwiched and fixed from the plate thickness direction, the fuse support balance is better at the fuse mounting part than the conventional fuse box where the mating terminal supports and fixes the tab part of the fuse protruding from the insulating housing Therefore, it is possible to suppress the blurring of the fuse after being mounted and to reduce the overall height of the fuse itself.
[0036]
According to the fuse box of the present invention as described above, the fuse mounting portion includes a fuse guide wall that supports the insulating housing of the mounted fuse and an insulating wall that prevents current leakage between the mating terminals. since the insulating wall is lower in height than these mating terminals, the fuse mounting portion, a high molding accuracy of the fuse guide walls for preventing shaking of the fuse or the like is not needed, the fuse guide wall and the insulating wall The height can be made lower than before . Therefore, it is possible to reduce the size of the fuse mounting part and improve the workability of inserting the fuse.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a fuse mounted on a fuse mounting portion of a fuse box according to an embodiment of the present invention.
FIG. 2 is a front view of the fuse shown in FIG.
3 is a front view showing a state in which the fuse shown in FIG. 1 is mounted on a fuse mounting portion. FIG.
4 is a side view showing a state where the fuse shown in FIG. 1 is mounted on a fuse mounting portion. FIG.
FIG. 5 is a front view showing a modification of the fuse attached to the fuse attachment portion of the fuse box according to the embodiment of the present invention.
FIG. 6 is a front view showing another modified example of the fuse mounted on the fuse mounting portion of the fuse box according to the embodiment of the present invention.
FIG. 7 is a front view showing a fuse mounted on a fuse mounting portion of a conventional fuse box.
8 is a front view showing a state in which the fuse shown in FIG. 7 is mounted on the fuse mounting portion. FIG.
9 is a side view showing a state in which the fuse shown in FIG. 7 is mounted on the fuse mounting portion. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fuse mounting part 11 Opposite side terminal 20 Fuse 21 Flat plate terminal part 21a Inner edge 21c Upper edge 21d Outer edge 21e Lower edge 21f Intermediate part 22 Soluble part 23 Insulating housing 24 Housing member 25 Fuse element

Claims (4)

一対の平行な平板端子部の内側縁の間に可溶部が設けられたヒューズエレメントと、各平板端子部の内側縁及び上端縁及び前記可溶部を覆う略T字状の絶縁ハウジングとを備えたヒューズが装着されヒューズ装着部を有するヒューズボックスであって、
前記ヒューズ装着部の相手側端子が、前記各平板端子部の装着方向における中間部位を板厚方向から挟持固定することにより、電気的に接続し、
前記ヒューズ装着部が、装着された前記ヒューズの絶縁ハウジングを支持するヒューズガイド壁と、前記相手側端子間の電流リークを防止する絶縁壁とを備えると共に、前記絶縁壁がこれら相手側端子よりも低い高さとされることを特徴とするヒューズボックス。
A fuse element provided with a fusible portion between inner edges of a pair of parallel flat plate terminal portions, and an approximately T-shaped insulating housing covering the inner and upper edges of the flat plate terminal portions and the fusible portion; A fuse box having a fuse mounting portion to which the provided fuse is mounted,
The counterpart terminal of the fuse mounting part is electrically connected by sandwiching and fixing an intermediate part in the mounting direction of each flat plate terminal part from the plate thickness direction ,
The fuse mounting portion includes a fuse guide wall that supports an insulating housing of the mounted fuse, and an insulating wall that prevents current leakage between the mating terminals, and the insulating wall is more than these mating terminals. A fuse box characterized by a low height .
一対の平行な平板端子部の内側縁の間に可溶部が設けられたヒューズエレメントと、各平板端子部の内側縁及び上端縁及び前記可溶部を覆う略T字状の絶縁ハウジングとを備えたヒューズが装着されヒューズ装着部を有するヒューズボックスであって、
前記ヒューズ装着部の相手側端子が、前記可溶部の側方に位置する前記各平板端子部の中間部位を板厚方向から挟持固定し、
前記ヒューズ装着部が、装着された前記ヒューズの絶縁ハウジングを支持するヒューズガイド壁と、前記相手側端子間の電流リークを防止する絶縁壁とを備えると共に、前記絶縁壁がこれら相手側端子よりも低い高さとされることを特徴とするヒューズボックス。
A fuse element provided with a fusible portion between inner edges of a pair of parallel flat plate terminal portions, and an approximately T-shaped insulating housing covering the inner and upper edges of the flat plate terminal portions and the fusible portion; A fuse box having a fuse mounting portion to which the provided fuse is mounted,
The mating terminal of the fuse mounting part sandwiches and fixes the intermediate part of each flat terminal part located on the side of the fusible part from the plate thickness direction ,
The fuse mounting portion includes a fuse guide wall that supports an insulating housing of the mounted fuse, and an insulating wall that prevents current leakage between the mating terminals, and the insulating wall is more than these mating terminals. A fuse box characterized by a low height .
前記ヒューズ装着部の相手側端子が、前記絶縁ハウジングの位置決め用当接部と当接することによってヒューズの挿入位置決めを行なうことを特徴とする請求項1又は2に記載のヒューズボックス。  3. The fuse box according to claim 1, wherein the fuse mounting portion performs positioning of the fuse by being brought into contact with a positioning contact portion of the insulating housing. 前記ヒューズ装着部に装着されたヒューズを取り外す為のヒューズ抜取り治具が係合する治具係合用段部が、前記絶縁ハウジングにおける各平板端子部の上端縁を覆う部位に設けられていることを特徴とする請求項1乃至3のいずれか1項に記載のヒューズボックス。A jig engaging step for engaging with a fuse extraction jig for removing the fuse mounted on the fuse mounting section is provided at a portion covering the upper edge of each flat terminal portion in the insulating housing. The fuse box according to claim 1, wherein the fuse box is characterized in that:
JP2001108936A 2001-04-06 2001-04-06 Fuse box Expired - Lifetime JP3722421B2 (en)

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US7612646B2 (en) 2003-04-04 2009-11-03 Yazaki Corporation Fuse cavity structure and electric connection box
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