JP3420947B2 - Heat dissipation structure of electrical junction box - Google Patents
Heat dissipation structure of electrical junction boxInfo
- Publication number
- JP3420947B2 JP3420947B2 JP24055598A JP24055598A JP3420947B2 JP 3420947 B2 JP3420947 B2 JP 3420947B2 JP 24055598 A JP24055598 A JP 24055598A JP 24055598 A JP24055598 A JP 24055598A JP 3420947 B2 JP3420947 B2 JP 3420947B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- electric
- box body
- box
- dissipation structure
- 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.)
- Expired - Fee Related
Links
Landscapes
- Cooling Or The Like Of Electrical Apparatus (AREA)
- Connection Or Junction Boxes (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は、自動車等の電気配
線に使用される電気接続箱の放熱構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat dissipation structure for an electric junction box used for electric wiring of automobiles and the like.
【0002】[0002]
【従来の技術】複雑な電気要素を有する自動車には、多
数の電気部品が使用されており、これらの電気部品間の
情報、信号又は電力の授受などの為の電気回路を一括的
に相互接続すべく、ジャンクションボックスやリレーボ
ックスなどの電気接続箱が一般に利用されている。2. Description of the Related Art A large number of electric parts are used in automobiles having complicated electric elements, and electric circuits for exchanging information, signals or electric power among these electric parts are collectively interconnected. Therefore, electric junction boxes such as junction boxes and relay boxes are commonly used.
【0003】図5に示したように、この様な電気接続箱
30は、バスバーを配索した絶縁基板を積層して成る配
線板組立体やヒューズ9、リレー5等の各種電気部品
が、合成樹脂製の箱本体2内に収容されており、該箱本
体2の部品装着側には、防水、防塵の為のアッパーカバ
ー3が着脱自在に装着されている。これらヒューズ9、
リレー5等には所定回路を形成するための入出力用の電
線6が接続され、該電線6はアンダーカバー4に穿設さ
れた貫通孔4aから外部に引き出されている。貫通孔4
aから引き出された電線6の取り出し部は、アンダーカ
バー4に突設されたハーネス保持片8と共に絶縁テープ
7が巻かれ、アンダーカバー4に固定されている。As shown in FIG. 5, in such an electric connection box 30, various electrical parts such as a wiring board assembly and fuses 9 and relays 5 formed by laminating insulating boards on which bus bars are arranged are combined. It is housed in a box body 2 made of resin, and an upper cover 3 for waterproofing and dustproofing is detachably mounted on the component mounting side of the box body 2. These fuses 9,
An input / output electric wire 6 for forming a predetermined circuit is connected to the relay 5 and the like, and the electric wire 6 is drawn out through a through hole 4a formed in the under cover 4. Through hole 4
An insulating tape 7 is wound around the take-out portion of the electric wire 6 pulled out from a together with a harness holding piece 8 protruding from the under cover 4, and is fixed to the under cover 4.
【0004】ところで、近年、自動車等に搭載される電
装品の増加に伴い、ヒューズ9やリレー5等の電気機能
部品が増加して電気接続箱内の回路密度が高くなると共
に、電気接続箱の省スペース化が望まれており、箱内の
温度上昇値は高くなる傾向にある。一方、電気接続箱
は、内部に水が侵入して滞留すると、回路が短絡した
り、リーク電流が流れる虞があるので、通常は防水構造
とされており、箱内を密閉した状態となっている。例え
ば、アンダーカバー4に穿設された貫通孔4aの近傍
も、ハーネス固定の為に電線束が絶縁テープ7で巻か
れ、密閉されてしまう。その結果、発熱部品や端子接続
部などの発熱箇所が多くなり、特にヒューズ9の可溶部
やリレー5のコイル部の発熱が生じ、電気機能部品や箱
本体2に機能障害や溶損が生じる恐れがあった。By the way, in recent years, with the increase in the number of electrical components mounted on automobiles and the like, the number of electrical functional parts such as fuses 9 and relays 5 has increased, the circuit density in the electrical junction box has increased, and the electrical junction box Space saving is desired, and the temperature rise value in the box tends to increase. On the other hand, the electric connection box is usually waterproof because there is a risk of short circuit or leakage current flowing when water enters and stays inside the box. There is. For example, in the vicinity of the through hole 4a formed in the under cover 4, the wire bundle is also wrapped with the insulating tape 7 for fixing the harness, and is sealed. As a result, the number of heat generating parts such as heat generating parts and terminal connecting parts increases, and particularly the fusible part of the fuse 9 and the coil part of the relay 5 generate heat, causing functional failures and melting damage to the electric functional parts and the box body 2. I was afraid.
【0005】そこで、例えば実開昭62−12254号
公報に開示されたヒューズボックスのように、ケース
(箱本体)のヒューズソケットに取付けられたヒューズ
と前記ソケットに取付けられるカバー(アッパーカバ
ー)との間に弾性伝熱部材を介在せしめ、該ヒューズで
発生する熱をカバーに伝導して冷却せしめる構成のヒュ
ーズボックスが提案されている。Therefore, for example, like a fuse box disclosed in Japanese Utility Model Laid-Open No. 62-12254, a fuse attached to a fuse socket of a case (box body) and a cover (upper cover) attached to the socket. A fuse box is proposed in which an elastic heat transfer member is interposed between the fuse box and the heat generated in the fuse to be conducted to the cover for cooling.
【0006】前記弾性伝熱部材は、絶縁性、弾性を存し
且つ熱伝導率の良いシリコン系放熱グリース含浸ゴムの
板状部材をもって形成されている。又、頂面に放熱フィ
ンが突設された前記カバーは、伝熱材料で作られてい
る。従って、ヒューズで発生した熱は、前記弾性伝熱部
材を通してカバーに伝達され、放熱フィンを介して積極
的に大気に放熱される。The elastic heat transfer member is formed of a plate member made of a silicon-based heat radiating grease impregnated rubber which has insulating properties and elasticity and has a high thermal conductivity. Further, the cover having the radiation fins protruding from the top surface is made of a heat transfer material. Therefore, the heat generated by the fuse is transmitted to the cover through the elastic heat transfer member and is positively radiated to the atmosphere through the heat radiation fins.
【0007】[0007]
【発明が解決しようとする課題】しかしながら、上記実
開昭62−12254号公報に開示されたヒューズボッ
クスの構成では、ヒューズ本体で発生する熱をケース外
に放熱することはできるが、端子接続部や電線自体の発
熱によるケース内の熱をケース外に放熱することはでき
ない。However, in the structure of the fuse box disclosed in Japanese Utility Model Laid-Open No. 62-12254, the heat generated in the fuse body can be dissipated to the outside of the case, but the terminal connecting portion. It is not possible to dissipate the heat inside the case to the outside of the case due to the heat generated by the cable or the wire itself.
【0008】又、ヒューズやリレー等の異形状の電気部
品が装着される電気接続箱の場合には、アッパーカバー
と各電気部品との間に介在される弾性伝熱部材の形状が
複雑になり、車種毎に専用のカバー又は弾性伝熱部材が
必要となってしまう。従って、本発明の目的は上記課題
を解消することに係り、簡単な構造で温度上昇を抑制で
きる安価な電気接続箱の放熱構造を提供することであ
る。Further, in the case of an electric connection box in which electric parts of different shapes such as fuses and relays are mounted, the shape of the elastic heat transfer member interposed between the upper cover and each electric part becomes complicated. A dedicated cover or elastic heat transfer member is required for each vehicle type. Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide an inexpensive heat dissipation structure for an electric junction box that can suppress a temperature rise with a simple structure.
【0009】[0009]
【課題を解決するための手段】本発明の上記目的は、防
水構造の箱本体内に発熱源となる電気部品が収容された
電気接続箱の放熱構造であって、前記電気部品に接続さ
れて貫通孔から外部に引き出される電線の電線束の内部
には、箱本体内と外部に渡って伸びる長尺状の熱伝導部
材が介在せしめられていることを特徴とする電気接続箱
の放熱構造により達成される。The above object of the present invention is to prevent the above problems.
A heat dissipation structure of an electric connection box in which an electric component serving as a heat source is housed in a box body having a water structure, and inside the electric wire bundle of electric wires connected to the electric component and drawn out through a through hole, This is achieved by a heat dissipation structure of an electrical junction box, in which a long heat conducting member extending inside and outside the box body is interposed.
【0010】上記構成によれば、防水構造の箱本体内で
生じた熱は、熱伝導部材の箱本体内側端部で吸熱され、
該熱伝導部材の外部側端部で放熱されるので、箱本体内
の温度上昇を抑制することができる。又、電線束の内部
に介在せしめられた前記熱伝導部材は、電線自体の発熱
を外部に効率よく排熱できる。更に、前記熱伝導部材
は、ハーネス組立て時に電線束の内部に介在せしめら
れ、電線と共に絶縁テープ等で巻かれるので、貫通孔か
ら引き出される電線の取り出し部の防水性が低下するこ
ともない。According to the above structure, the heat generated in the waterproof box body is absorbed by the inner end of the box body of the heat conducting member,
Since the heat is dissipated at the outer end of the heat conducting member, the temperature rise in the box body can be suppressed. Further, the heat conducting member interposed inside the electric wire bundle can efficiently exhaust the heat generated by the electric wires to the outside. Further, since the heat conducting member is interposed inside the electric wire bundle during assembly of the harness and is wound with the electric wire with an insulating tape or the like, the waterproof property of the takeout portion of the electric wire drawn out from the through hole does not deteriorate.
【0011】尚、好ましくは前記熱伝導部材の外部側端
部には、放射状に延びて外気に接触可能な放熱部が設け
られる。そこで、前記放熱部が外気に接触可能とされる
ことにより、熱伝導部材の外部側端部での放熱効率を高
めることができる。又、好ましくは前記熱伝導部材が、
前記電線の被覆材よりも熱伝導率が高い軟質樹脂材料か
ら成ることにより、放熱性を更に高めることができる。It is preferable that a heat radiating portion that extends radially and is in contact with the outside air is provided at the outer end of the heat conducting member. Therefore, by allowing the heat radiating portion to come into contact with the outside air, the heat radiation efficiency at the outer end of the heat conducting member can be improved. Also, preferably, the heat conducting member,
By using a soft resin material having a higher thermal conductivity than the covering material of the electric wire, it is possible to further improve heat dissipation.
【0012】又、本発明の上記目的は、防水構造の箱本
体内に発熱源となる電気部品が収容された電気接続箱の
放熱構造であって、前記電気部品に接続されて貫通孔か
ら外部に引き出される電線の電線束の周囲には、箱本体
内と外部に渡って連続する熱伝導性シートが巻装されて
いることを特徴とする電気接続箱の放熱構造により達成
される。Further, the above object of the present invention is a heat dissipation structure of an electric connection box in which electric parts which are heat sources are housed in a box body having a waterproof structure, which is connected to the electric parts and is externally connected through a through hole. This is achieved by a heat dissipation structure of an electrical connection box, in which a continuous heat conductive sheet is wound around the inside and outside of the box main body around the wire bundle of the electric wires drawn out.
【0013】上記構成によれば、防水構造の箱本体内で
生じた熱は、熱伝導性シートの箱本体内側で吸熱され、
該熱伝導性シートの外部側で放熱されるので、箱本体内
の温度上昇を抑制することができる。又、電線束の周囲
に巻装された前記熱伝導性シートは、電線自体の発熱を
外部に効率よく排熱できる。更に、前記熱伝導性シート
は、ハーネス組立て時に電線束の周囲に巻装され、電線
を絶縁テープ等と同様に巻くことができるので、貫通孔
から引き出される電線の取り出し部の防水性が低下する
こともない。According to the above construction, the heat generated inside the waterproof box body is absorbed inside the box body of the heat conductive sheet,
Since the heat is dissipated on the outside of the heat conductive sheet, the temperature rise in the box body can be suppressed. Further, the heat conductive sheet wound around the bundle of electric wires can efficiently discharge the heat generated by the electric wires to the outside. Further, since the heat conductive sheet is wound around the bundle of electric wires when the harness is assembled and the electric wires can be wound in the same manner as the insulating tape or the like, the waterproof property of the electric wire take-out portion pulled out from the through hole is deteriorated. Nothing.
【0014】尚、好ましくは前記熱伝導性シートが、片
面に粘着層を形成された絶縁テープとして巻着されるこ
とにより、ハーネス固定の為の絶縁テープが不要とな
る。又、電線に対する前記熱伝導性シートの密着度も増
し、放熱性を高めることができる。又、好ましくは前記
熱伝導性シートが、前記電線の被覆材よりも熱伝導率が
高い軟質樹脂材料から成ることにより、放熱性を更に高
めることができる。It is preferable that the heat conductive sheet is wound as an insulating tape having an adhesive layer formed on one surface thereof, so that an insulating tape for fixing a harness is not required. Also, the degree of adhesion of the heat conductive sheet to the electric wire is increased, and the heat dissipation can be improved. Further, preferably, the heat conductive sheet is made of a soft resin material having a higher heat conductivity than the covering material of the electric wire, whereby the heat dissipation can be further enhanced.
【0015】[0015]
【発明の実施の形態】以下、添付図面に基づいて本発明
の一実施形態を詳細に説明する。図1は本発明の第1実
施形態に係る放熱構造を備えた電気接続箱の要部破断分
解図であり、図2は図1に示した熱伝導部材の全体斜視
図であり、図3は図1のIII−III断面矢視図である。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a fragmentary exploded view of an electric junction box having a heat dissipation structure according to a first embodiment of the present invention, FIG. 2 is an overall perspective view of the heat conducting member shown in FIG. 1, and FIG. FIG. 3 is a sectional view taken along the line III-III of FIG. 1.
【0016】図1に示した電気接続箱1は、図5に示し
た電気接続箱30と同様に、バスバーを配索した絶縁基
板を積層して成る配線板組立体やヒューズ9、リレー5
等の各種電気部品が、合成樹脂製の箱本体2内に収容さ
れており、該箱本体2の部品装着側には、防水、防塵の
為のアッパーカバー3が着脱自在に装着されている。こ
れらヒューズ9、リレー5等には所定回路を形成するた
めの入出力用の電線6が接続され、該電線6はアンダー
カバー4に穿設された貫通孔4aから外部に引き出され
ている。貫通孔4aから引き出された電線6の取り出し
部は、アンダーカバー4に突設されたハーネス保持片8
と共に絶縁テープ7が巻かれ、アンダーカバー4に固定
されている。The electric junction box 1 shown in FIG. 1 is similar to the electric junction box 30 shown in FIG. 5 in that a wiring board assembly formed by laminating insulating boards with bus bars arranged therein, a fuse 9, and a relay 5 are provided.
Various electric parts such as are housed in a box body 2 made of synthetic resin, and an upper cover 3 for waterproof and dustproof is detachably mounted on the part mounting side of the box body 2. An electric wire 6 for input and output for forming a predetermined circuit is connected to the fuse 9, the relay 5 and the like, and the electric wire 6 is drawn out through a through hole 4a formed in the under cover 4. The take-out portion of the electric wire 6 pulled out from the through hole 4 a is provided with a harness holding piece 8 protruding from the under cover 4.
An insulating tape 7 is wrapped around and fixed to the under cover 4.
【0017】更に、前記絶縁テープ7に巻かれた電線6
の電線束の内部には、箱本体2内と外部に渡って伸びる
長尺状の熱伝導部材10が介在せしめられている。前記
熱伝導部材10は、図2に示した様に、単純な丸棒の一
端に放射状に延びた複数の放熱部13を形成した樹脂部
品であり、好ましくは前記電線6の被覆材よりも熱伝導
率が高い軟質樹脂材料から成る。Further, the electric wire 6 wound around the insulating tape 7
Inside the electric wire bundle, a long heat conducting member 10 extending between the inside of the box body 2 and the outside is interposed. As shown in FIG. 2, the heat-conducting member 10 is a resin part in which a plurality of heat-dissipating portions 13 extending radially are formed at one end of a simple round bar, and it is preferable that the heat-conducting member 10 has a heat resistance higher than that of the covering material of the electric wire 6. It is made of a soft resin material with high conductivity.
【0018】尚、前記熱伝導部材10を構成する軟質樹
脂材料としては、高熱伝導性絶縁ゴム(シリコンゴムに
特殊セラミックスを複合成形したもの。)等を用いるこ
とができる。As the soft resin material forming the heat conducting member 10, high heat conductive insulating rubber (composite molding of silicon rubber with special ceramics) or the like can be used.
【0019】そこで、ハーネス組立て時には、前記熱伝
導部材10の箱本体内側端部11が箱本体2内に挿入さ
れ、前記放熱部13を形成された外部側端部12が箱本
体2の外部に引き出されるようにして、電線6の電線束
内に介在せしめられ、これら電線6と共に絶縁テープ7
が巻かれる。そして、外部側端部12に形成された前記
放熱部13の先端は、図1及び図3に示したように、絶
縁テープ7を貫通して外気に接触可能とされる。この
際、軟質樹脂材料から成る前記熱伝導部材10は、電線
6と共に引出し形状に沿って適度に撓むことができるの
で、電線束内に容易に介在せしめられると共にテープ巻
作業に支障をきたすことも無い。Therefore, at the time of assembling the harness, the box body inner end 11 of the heat conducting member 10 is inserted into the box body 2, and the outer end 12 having the heat radiating portion 13 is outside the box body 2. It is pulled out so as to be interposed in the bundle of electric wires 6, and together with these electric wires 6, an insulating tape 7
Is rolled. The tip of the heat dissipation portion 13 formed on the outer end portion 12 penetrates the insulating tape 7 and can come into contact with the outside air, as shown in FIGS. 1 and 3. At this time, the heat conducting member 10 made of a soft resin material can be appropriately bent along with the electric wire 6 along the drawing shape, so that the heat conducting member 10 can be easily interposed in the electric wire bundle and hinder the tape winding operation. There is also no.
【0020】次に、本第1実施形態に係る電気接続箱1
の放熱構造における作用を以下に説明する。前記箱本体
2内に収容されたヒューズ9の可溶部やリレー5のコイ
ル部の発熱により生じた熱は、該箱本体2内に挿入され
た前記熱伝導部材10の箱本体内側端部11に吸熱され
る。Next, the electric junction box 1 according to the first embodiment.
The operation of the heat dissipation structure will be described below. The heat generated by the heat generated in the fusible part of the fuse 9 and the coil part of the relay 5 housed in the box body 2 is the inner end 11 of the box body 2 of the heat conducting member 10 inserted in the box body 2. Is absorbed by.
【0021】そして、前記箱本体内側端部11に吸熱さ
れた熱は、適度な径を有する熱伝導部材10内を経て外
部側端部12に伝わり、外気に接している周囲の電線6
及び絶縁テープ7を介して外部に排熱される。更に、前
記熱伝導部材10の外部側端部12には、放射状に延び
て外気に接触する放熱部13が設けられているので、外
部側端部12に伝わった熱を該放熱部13から直接排熱
することもできる。The heat absorbed by the inner end 11 of the box body is transmitted to the outer end 12 through the inside of the heat conducting member 10 having an appropriate diameter, and the surrounding electric wire 6 in contact with the outside air.
Heat is exhausted to the outside through the insulating tape 7. Further, since the outer end 12 of the heat conducting member 10 is provided with the heat radiating portion 13 which extends radially and contacts the outside air, the heat transmitted to the outer end 12 is directly transmitted from the heat radiating portion 13. You can also exhaust heat.
【0022】即ち、本第1実施形態に係る電気接続箱1
の放熱構造によれば、箱本体2内で生じた熱は、前記熱
伝導部材10を伝わって外部に放熱されるので、箱本体
2内の温度上昇を抑制することができる。又、電気接続
箱1から外部に引き出される電線6の電線束の内部に介
在せしめられた前記熱伝導部材10は、電線6自体の発
熱を外部に効率よく排熱することができる。That is, the electrical junction box 1 according to the first embodiment.
According to the heat radiation structure, the heat generated in the box body 2 is radiated to the outside through the heat conducting member 10, so that the temperature rise in the box body 2 can be suppressed. Further, the heat conducting member 10 interposed inside the electric wire bundle of the electric wires 6 drawn out from the electric junction box 1 can efficiently exhaust the heat generated by the electric wires 6 to the outside.
【0023】更に、前記熱伝導部材10は、ハーネス組
立て時に電線束の内部に介在せしめられ、電線6と共に
絶縁テープ7で巻かれるので、アンダーカバー4の貫通
孔4aから引き出される電線6の取り出し部の防水性が
低下することもない。又、本第1実施形態に係る電気接
続箱1の放熱構造は、単純な形状の熱伝導部材10を電
線6と共に絶縁テープ7で巻くだけで良く、箱本体2や
アンダーカバー4には特定の構造を必要としないので、
異なる形状の電気接続箱にも使用でき、どのような車種
にも適用可能である。Further, since the heat conducting member 10 is interposed inside the electric wire bundle at the time of assembling the harness and is wound with the insulating tape 7 together with the electric wire 6, the takeout portion of the electric wire 6 pulled out from the through hole 4a of the under cover 4 is taken out. The waterproofness of the will not be reduced. In addition, the heat dissipation structure of the electrical junction box 1 according to the first embodiment only needs to wrap the heat conducting member 10 having a simple shape together with the electric wires 6 with the insulating tape 7, and the box main body 2 and the under cover 4 have a specific shape. Since no structure is needed,
It can be used for electric junction boxes of different shapes and can be applied to any type of vehicle.
【0024】尚、本発明の熱伝導部材の構成は、上記第
1実施形態における熱伝導部材10の構成に限定される
ものではなく、種々の構成を採りうることは言うまでも
ない。例えば、熱伝導部材を単純な丸棒としても良く、
複数本の熱伝導部材を電線束の内部に介在せしめても良
い。又、吸熱性及び放熱性を高める為に、少なくとも一
部の表面積が広くなるような形状に熱伝導部材を形成す
ることもできる。The structure of the heat conducting member of the present invention is not limited to the structure of the heat conducting member 10 in the first embodiment, and it goes without saying that various structures can be adopted. For example, the heat conducting member may be a simple round bar,
A plurality of heat conducting members may be interposed inside the electric wire bundle. Further, in order to enhance the heat absorbing property and the heat radiating property, it is possible to form the heat conducting member in a shape such that at least a part of the surface area is increased.
【0025】図4は、本発明の第2実施形態に係る放熱
構造を備えた電気接続箱の要部破断正面図である。但
し、図1に示した上記電気接続箱1と同様の構成部品に
ついては、同符号を付して詳細な説明を省略する。図4
に示した電気接続箱20では、アンダーカバー4に穿設
された貫通孔4aから外部に引き出される電線6の電線
束の周囲には、箱本体2内と外部に渡って連続する熱伝
導性シート21が巻装されている。そこで、前記電線6
の取り出し部は、アンダーカバー4に突設されたハーネ
ス保持片8と共に熱伝導性シート21が巻かれ、アンダ
ーカバー4に固定されている。FIG. 4 is a fragmentary front view of an electric junction box having a heat dissipation structure according to a second embodiment of the present invention. However, the same components as those of the electrical junction box 1 shown in FIG. 1 are designated by the same reference numerals and detailed description thereof will be omitted. Figure 4
In the electric junction box 20 shown in FIG. 1, a heat conductive sheet that is continuous inside and outside the box body 2 is provided around the wire bundle of the electric wires 6 that are drawn out from the through holes 4 a formed in the under cover 4. 21 is wound. Therefore, the electric wire 6
The heat-conducting sheet 21 is wound around the take-out portion of the harness holding piece 8 protruding from the under cover 4, and is fixed to the under cover 4.
【0026】前記熱伝導性シート21は、テープ状に形
成された樹脂シートであり、好ましくは上記第1実施形
態の熱伝導部材10と同様の熱伝導率が高い軟質樹脂材
料から成る。そこで、ハーネス組立て時には、箱本体2
内に収容されたヒューズ及びリレー等に接続される電線
6の端子接続部近傍から、貫通孔4aを経て外部に引き
出される電線束の取り出し部近傍に渡って、前記熱伝導
性シート21が巻かれる。そして、これら熱伝導性シー
ト21の巻付け両端部は、絶縁テープ7で固定されてい
る。この際、軟質樹脂材料から成る前記熱伝導性シート
21は、電線束の周囲に容易に巻き付けることができ
る。The heat conductive sheet 21 is a resin sheet formed in a tape shape, and is preferably made of a soft resin material having a high heat conductivity similar to the heat conductive member 10 of the first embodiment. Therefore, when assembling the harness, the box body 2
The heat conductive sheet 21 is wound from the vicinity of the terminal connection portion of the electric wire 6 connected to the fuse and the relay housed inside to the vicinity of the extraction portion of the electric wire bundle drawn out through the through hole 4a. . Then, both ends of the heat conductive sheet 21 that are wound around are fixed by the insulating tape 7. At this time, the heat conductive sheet 21 made of a soft resin material can be easily wrapped around the wire bundle.
【0027】次に、本第2実施形態に係る電気接続箱2
0の放熱構造における作用を以下に説明する。前記箱本
体2内に収容されたヒューズ9の可溶部やリレー5のコ
イル部の発熱により生じた熱は、該箱本体2内で電線6
の端子接続部近傍に巻装された前記熱伝導性シート21
の箱本体内側に吸熱される。そして、前記熱伝導性シー
ト21の箱本体側で吸熱された熱は、電線6の周囲に巻
装された該熱伝導性シート21を経て外部の電線束の取
り出し部近傍に巻装された熱伝導性シート21の外部側
に伝わり、外気に接している該熱伝導性シート21の外
部側周囲より外気に排熱される。Next, the electric junction box 2 according to the second embodiment.
The operation of the heat dissipation structure of No. 0 will be described below. The heat generated by the heat generated in the fusible portion of the fuse 9 and the coil portion of the relay 5 housed in the box body 2 is transferred to the electric wire 6 in the box body 2.
Of the heat conductive sheet 21 wound around the terminal connection part of the
Heat is absorbed inside the box body. The heat absorbed on the box body side of the heat conductive sheet 21 passes through the heat conductive sheet 21 wound around the electric wire 6 and is wound around the external wire bundle take-out portion. The heat is transmitted to the outside of the conductive sheet 21, and is exhausted to the outside from around the outside of the thermally conductive sheet 21 in contact with the outside.
【0028】即ち、本第2実施形態に係る電気接続箱2
0の放熱構造によれば、箱本体2内で生じた熱は、前記
熱伝導性シート21を伝わって外部に放熱されるので、
箱本体2内の温度上昇を抑制することができる。又、電
気接続箱20から外部に引き出される電線6の電線束の
周囲に巻装された前記熱伝導性シート20は、電線6自
体の発熱を外部に効率よく排熱することができる。That is, the electrical junction box 2 according to the second embodiment.
According to the heat dissipation structure of 0, the heat generated in the box body 2 is dissipated to the outside through the heat conductive sheet 21.
The temperature rise in the box body 2 can be suppressed. Further, the heat conductive sheet 20 wound around the electric wire bundle of the electric wires 6 drawn out from the electric junction box 20 can efficiently exhaust the heat generated by the electric wires 6 to the outside.
【0029】更に、前記熱伝導性シート21は、ハーネ
ス組立て時に電線束の周囲に巻装され、電線6を絶縁テ
ープ等と同様に巻くことができるので、貫通孔4aから
引き出される電線6の取り出し部の防水性が低下するこ
ともない。又、本第2実施形態に係る電気接続箱20の
放熱構造は、テープ状の熱伝導性シート21を電線6の
周囲に巻くだけで良く、箱本体2やアンダーカバー4に
は特定の構造を必要としないので、異なる形状の電気接
続箱にも使用でき、どのような車種にも適用可能であ
る。Further, since the heat conductive sheet 21 is wound around the bundle of electric wires at the time of assembling the harness and the electric wire 6 can be wound in the same manner as the insulating tape, the electric wire 6 taken out from the through hole 4a can be taken out. The waterproofness of the part does not deteriorate. In addition, the heat dissipation structure of the electrical junction box 20 according to the second embodiment only needs to wrap the tape-shaped heat conductive sheet 21 around the electric wire 6, and the box body 2 and the under cover 4 have a specific structure. Since it is not necessary, it can be used for electric junction boxes of different shapes and can be applied to any vehicle type.
【0030】尚、本発明の熱伝導性シートの構成は、上
記第2実施形態における熱伝導性シート21の構成に限
定されるものではなく、種々の構成を採りうることは言
うまでもない。例えば、熱伝導性シートの片面に粘着層
を形成し、電線6の周囲に絶縁テープとして巻着できる
ようにすれば、ハーネス固定の為の絶縁テープ7が不要
となる。この場合、電線6に対する前記熱伝導性シート
の密着度も増し、放熱性を更に高めることができる。The structure of the heat conductive sheet of the present invention is not limited to the structure of the heat conductive sheet 21 in the second embodiment, and it goes without saying that various structures can be adopted. For example, if an adhesive layer is formed on one surface of the heat conductive sheet so that it can be wrapped around the electric wire 6 as an insulating tape, the insulating tape 7 for fixing the harness becomes unnecessary. In this case, the degree of adhesion of the heat conductive sheet to the electric wire 6 is increased, and the heat dissipation can be further enhanced.
【0031】[0031]
【発明の効果】以上の説明により明らかなように、本発
明の電気接続箱の放熱構造は、電気部品に接続されて貫
通孔から外部に引き出される電線の電線束の内部に、箱
本体内と外部に渡って伸びる長尺状の熱伝導部材を介在
せしめて成る。そこで、防水構造の箱本体内で生じた熱
は、熱伝導部材の箱本体内側端部で吸熱され、該熱伝導
部材の外部側端部で放熱されるので、箱本体内の温度上
昇を抑制することができる。又、電線束の内部に介在せ
しめられた前記熱伝導部材は、電線自体の発熱を外部に
効率よく排熱できる。更に、前記熱伝導部材は、ハーネ
ス組立て時に電線束の内部に介在せしめられ、電線と共
に絶縁テープ等で巻かれるので、貫通孔から引き出され
る電線の取り出し部の防水性が低下することもない。As is apparent from the above description, the heat dissipation structure of the electric junction box according to the present invention is provided inside the box body inside the electric wire bundle of electric wires connected to the electric parts and drawn out from the through hole. It is formed by interposing a long heat conducting member extending to the outside. Therefore, the heat generated in the waterproof box body is absorbed at the box body inner end of the heat conducting member and radiated at the outer side end of the heat conducting member, so that the temperature rise in the box body is suppressed. can do. Further, the heat conducting member interposed inside the electric wire bundle can efficiently exhaust the heat generated by the electric wires to the outside. Further, since the heat conducting member is interposed inside the electric wire bundle during assembly of the harness and is wound with the electric wire with an insulating tape or the like, the waterproof property of the takeout portion of the electric wire drawn out from the through hole does not deteriorate.
【0032】又、本発明の他の電気接続箱の放熱構造
は、電気部品に接続されて貫通孔から外部に引き出され
る電線の電線束の周囲に、箱本体内と外部に渡って連続
する熱伝導性シートを巻装して成る。そこで、防水構造
の箱本体内で生じた熱は、熱伝導性シートの箱本体内側
で吸熱され、該熱伝導性シートの外部側で放熱されるの
で、箱本体内の温度上昇を抑制することができる。又、
電線束の周囲に巻装された前記熱伝導性シートは、電線
自体の発熱を外部に効率よく排熱できる。更に、前記熱
伝導性シートは、ハーネス組立て時に電線束の周囲に巻
装され、電線を絶縁テープ等と同様に巻くことができる
ので、貫通孔から引き出される電線の取り出し部の防水
性が低下することもない。従って、簡単な構造で温度上
昇を抑制できる安価な電気接続箱の放熱構造を提供でき
る。Further, in another heat dissipation structure for an electric connection box of the present invention, heat is continuously applied to the inside and outside of the box body around the wire bundle of electric wires connected to the electric parts and drawn out through the through holes. It is formed by winding a conductive sheet. Therefore, waterproof structure
Since the heat generated in the box body is absorbed inside the box body of the heat conductive sheet and radiated outside the heat conductive sheet, the temperature rise in the box body can be suppressed. or,
The heat conductive sheet wound around the bundle of electric wires can efficiently exhaust the heat generated by the electric wires to the outside. Further, since the heat conductive sheet is wound around the bundle of electric wires when the harness is assembled and the electric wires can be wound in the same manner as the insulating tape or the like, the waterproof property of the electric wire take-out portion pulled out from the through hole is deteriorated. Nothing. Therefore, it is possible to provide an inexpensive heat dissipation structure for an electric junction box that can suppress the temperature rise with a simple structure.
【図1】本発明の第1実施形態に係る放熱構造を備えた
電気接続箱の要部破断分解図である。FIG. 1 is a fragmentary exploded view of an electrical junction box including a heat dissipation structure according to a first embodiment of the present invention.
【図2】図1に示した熱伝導部材の全体斜視図である。FIG. 2 is an overall perspective view of the heat conducting member shown in FIG.
【図3】図1のIII−III断面矢視図である。3 is a sectional view taken along the line III-III of FIG.
【図4】本発明の第2実施形態に係る放熱構造を備えた
電気接続箱の要部破断正面図である。FIG. 4 is a cutaway front view of an essential part of an electrical junction box including a heat dissipation structure according to a second embodiment of the present invention.
【図5】従来の排水構造を備えた電気接続箱の要部破断
分解図である。FIG. 5 is a fragmentary exploded view of a conventional electrical junction box having a drainage structure.
1 電気接続箱 2 箱本体 3 アッパーカバー 4 アンダーカバー 4a 貫通孔 5 リレー 6 電線 7 絶縁テープ 9 ヒューズ 10 熱伝導部材 11 箱本体内側端部 12 外部側端部 13 放熱部 1 electrical junction box 2 box body 3 upper cover 4 Undercover 4a through hole 5 relays 6 electric wires 7 insulating tape 9 fuse 10 Heat conduction member 11 Box body inner end 12 External end 13 Heat dissipation part
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平10−42428(JP,A) 特開 平8−203336(JP,A) 実開 昭61−83278(JP,U) 実開 平4−99310(JP,U) (58)調査した分野(Int.Cl.7,DB名) H02G 3/08 H05K 7/20 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Laid-Open No. 10-42428 (JP, A) Japanese Patent Laid-Open No. 8-203336 (JP, A) Actually open 61-83278 (JP, U) Actually open 4- 99310 (JP, U) (58) Fields surveyed (Int.Cl. 7 , DB name) H02G 3/08 H05K 7/20
Claims (6)
部品が収容された電気接続箱の放熱構造であって、前記
電気部品に接続されて貫通孔から外部に引き出される電
線の電線束の内部には、箱本体内と外部に渡って伸びる
長尺状の熱伝導部材が介在せしめられていることを特徴
とする電気接続箱の放熱構造。1. A heat dissipation structure for an electric connection box in which an electric component serving as a heat source is housed in a waterproof box body, and a wire bundle of electric wires connected to the electric component and drawn out through a through hole. A heat dissipating structure for an electric connection box, wherein a long heat conducting member extending inside and outside the box body is interposed inside the box.
状に延びて外気に接触可能な放熱部が設けられているこ
とを特徴とする請求項1に記載の電気接続箱の放熱構
造。2. The heat dissipating structure for an electrical junction box according to claim 1, wherein a heat dissipating portion that extends radially and is in contact with the outside air is provided at an outer end of the heat conducting member. .
りも熱伝導率が高い軟質樹脂材料から成ることを特徴と
する請求項1又は2に記載の電気接続箱の放熱構造。3. The heat dissipation structure for an electrical junction box according to claim 1, wherein the heat conducting member is made of a soft resin material having a higher heat conductivity than the covering material of the electric wire.
部品が収容された電気接続箱の放熱構造であって、前記
電気部品に接続されて貫通孔から外部に引き出される電
線の電線束の周囲には、箱本体内と外部に渡って連続す
る熱伝導性シートが巻装されていることを特徴とする電
気接続箱の放熱構造。4. A heat dissipation structure for an electric connection box in which an electric component serving as a heat source is accommodated in a waterproof main body, and a bundle of electric wires connected to the electric component and drawn out through a through hole. A heat dissipating structure for an electrical connection box, characterized in that a heat conductive sheet is continuously wound around the inside and outside of the box body.
形成された絶縁テープとして巻着されていることを特徴
とする請求項4に記載の電気接続箱の放熱構造。5. The heat dissipation structure for an electrical junction box according to claim 4, wherein the heat conductive sheet is wound as an insulating tape having an adhesive layer formed on one surface thereof.
材よりも熱伝導率が高い軟質樹脂材料から成ることを特
徴とする請求項4又は5に記載の電気接続箱の放熱構
造。6. The heat dissipation structure for an electrical junction box according to claim 4, wherein the heat conductive sheet is made of a soft resin material having a higher heat conductivity than the covering material of the electric wire.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24055598A JP3420947B2 (en) | 1998-08-26 | 1998-08-26 | Heat dissipation structure of electrical junction box |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24055598A JP3420947B2 (en) | 1998-08-26 | 1998-08-26 | Heat dissipation structure of electrical junction box |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000069643A JP2000069643A (en) | 2000-03-03 |
JP3420947B2 true JP3420947B2 (en) | 2003-06-30 |
Family
ID=17061280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24055598A Expired - Fee Related JP3420947B2 (en) | 1998-08-26 | 1998-08-26 | Heat dissipation structure of electrical junction box |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3420947B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105048374A (en) * | 2014-12-04 | 2015-11-11 | 镇江飞利达电站设备有限公司 | Junction box capable of preventing overheating and damp for waste nitrogen electric heater |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2956253B1 (en) * | 2010-02-09 | 2012-12-14 | Peugeot Citroen Automobiles Sa | CONNECTING DEVICE WITH AUXILIARY THREAD (S) CONNECTION (S) AND CORRESPONDING ELECTRICAL BEAM |
JP7264655B2 (en) * | 2019-02-01 | 2023-04-25 | 矢崎総業株式会社 | electric junction box |
-
1998
- 1998-08-26 JP JP24055598A patent/JP3420947B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105048374A (en) * | 2014-12-04 | 2015-11-11 | 镇江飞利达电站设备有限公司 | Junction box capable of preventing overheating and damp for waste nitrogen electric heater |
CN105048374B (en) * | 2014-12-04 | 2018-01-16 | 镇江飞利达电站设备有限公司 | Overheat and moist dirty nitrogen electric heater junction box can be prevented |
Also Published As
Publication number | Publication date |
---|---|
JP2000069643A (en) | 2000-03-03 |
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