JP2000198395A - Electrical connection box - Google Patents
Electrical connection boxInfo
- Publication number
- JP2000198395A JP2000198395A JP11001059A JP105999A JP2000198395A JP 2000198395 A JP2000198395 A JP 2000198395A JP 11001059 A JP11001059 A JP 11001059A JP 105999 A JP105999 A JP 105999A JP 2000198395 A JP2000198395 A JP 2000198395A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- circuit board
- printed circuit
- core portion
- heat pipe
- 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
Links
Landscapes
- Connection Or Junction Boxes (AREA)
- Installation Of Bus-Bars (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、例えば、自動車な
どに搭載される電気接続箱に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box mounted on, for example, an automobile.
【0002】[0002]
【関連する背景技術】近年、自動車においては、快適性
に対するニーズが高まり、例えば、オーディオ、ナビゲ
ーションシステム、テレビ、電動アンテナ、エアコン、
リアウィンドウヒータ、シートヒータ、パワーシート、
サスペンションの硬さ制御などの様々な電装品が搭載さ
れている。そして、このような、自動車に搭載される電
装品の数及び種類は増加する傾向にある。2. Related Background Art In recent years, needs for comfort have increased in automobiles. For example, audio, navigation systems, televisions, electric antennas, air conditioners,
Rear window heater, seat heater, power seat,
Various electrical components such as suspension hardness control are installed. The number and types of electrical components mounted on automobiles tend to increase.
【0003】かかる電装品には、電気接続箱を経由して
バッテリ電源より電力が供給される。そして、この電気
接続箱内には、ワイヤハーネスとボディーとの短絡時や
モータなどの負荷が故障した時などに大電流が流れるの
を防止するヒューズや、電装品の操作スイッチ等と連動
して電装品への電力供給を制御するリレー等の電気部品
などが搭載されている。[0003] Such electrical components are supplied with power from a battery power supply via an electrical junction box. The electric connection box is linked with a fuse that prevents a large current from flowing when a short circuit occurs between the wire harness and the body or when a load such as a motor fails, or in conjunction with an operation switch for electric components. Electrical components such as relays for controlling power supply to electrical components are mounted.
【0004】電気接続箱としては、例えば、特開昭59
−28818号公報に示されるように、プラスチック等
の樹脂よりなる絶縁板の間にバスバーを配置して回路部
を形成したものが知られている。このバスバーは、銅、
銅合金あるいは黄銅の板材を打抜き加工や折曲げ加工す
ることにより所望の回路パターンに成形したものであ
り、所望の回路パターンに加工された複数のバスバー
は、当該回路パターンと適合するプラスチック製絶縁板
の間に配置され、絶縁状態が保たれている。そして、前
記絶縁板の所定位置から延出するバスバーの端子片にコ
ネクタを介してヒューズやリレーなどが取り付けられる
ようになっている。[0004] An example of an electric connection box is disclosed in
As disclosed in Japanese Patent No. 28818, a circuit part is known in which a bus bar is arranged between insulating plates made of a resin such as plastic. This busbar is made of copper,
A copper alloy or brass plate material is formed into a desired circuit pattern by punching or bending, and a plurality of bus bars processed into the desired circuit pattern are formed between plastic insulating plates compatible with the circuit pattern. And the insulated state is maintained. Further, a fuse, a relay, or the like is attached to a terminal piece of the bus bar extending from a predetermined position of the insulating plate via a connector.
【0005】バスバーを用いる電気接続箱においては、
自動車に搭載される電装品の増加に伴う回路の増加に対
応するため、バスバーを複数積層することが行われてい
る。このように、バスバーを複数積層すると、バスバー
の打抜き加工用や折り曲げ加工用の金型や絶縁板の成形
用金型が各層毎に必要となり、金型の製作費が嵩んでし
まう。しかも、電気接続箱全体として、構成部品の数が
多くなるので、電気接続箱を小型化することが困難にな
る。又、仕様を変更したくても、バスバーやプラスチッ
ク製絶縁板の金型の設計変更に長時間を要するので、現
実的には、仕様の変更をあきらめざるを得ない状況にあ
る。In an electric junction box using a bus bar,
In order to cope with an increase in circuits due to an increase in electrical components mounted on an automobile, a plurality of bus bars are stacked. As described above, when a plurality of busbars are stacked, a die for punching and bending the busbar and a die for forming an insulating plate are required for each layer, which increases the manufacturing cost of the die. In addition, since the number of components increases as a whole of the electric connection box, it is difficult to reduce the size of the electric connection box. In addition, even if it is desired to change the specification, it takes a long time to change the design of the bus bar and the mold of the plastic insulating plate. Therefore, in reality, there is a situation in which the change of the specification must be given up.
【0006】そこで、電子ユニットに一般的に使用され
ているガラスエポキシ樹脂を主材料とするプリント回路
基板によってバスバーの回路を置き換えた電子接続箱
が、例えば、特開平9−180831号公報に提案され
ている。このようなプリント回路基板を製作するに当た
って、金型を必要とせず、回路パターンの変更も比較的
簡単に行うことができる。Therefore, an electronic junction box in which a bus bar circuit is replaced by a printed circuit board mainly made of glass epoxy resin generally used for an electronic unit has been proposed, for example, in Japanese Patent Application Laid-Open No. 9-180831. ing. In manufacturing such a printed circuit board, a mold is not required and the circuit pattern can be changed relatively easily.
【0007】バスバーの回路をプリント回路基板に置き
換えた場合、バッテリやオルタネータと電気的に接続す
る大電流用回路や中電流回路を回路基板上に形成するた
めに、例えば、70μ以上の比較的厚みのある銅箔の回
路パターンを回路基板上に形成する必要がある。一方、
このような回路パターンを有するプリント回路基板を備
えた電気接続箱を車両のエンジンルーム内に搭載したと
き、エンジンルーム内の熱影響により、プリント回路基
板を構成するガラスエポキシ樹脂と回路パターンを構成
する銅箔との間に熱膨張の差が生じ、その結果、回路パ
ターンに熱応力が発生して銅箔がガラスエポキシ樹脂か
ら剥離したり、半田付け部分において半田クラックを発
生することがある。When the circuit of the bus bar is replaced with a printed circuit board, a relatively thick circuit having a relatively large thickness of, for example, 70 μm or more is formed on the circuit board in order to form a large current circuit or a medium current circuit electrically connected to a battery or an alternator. It is necessary to form a copper foil circuit pattern with a pattern on a circuit board. on the other hand,
When an electric junction box provided with a printed circuit board having such a circuit pattern is mounted in an engine room of a vehicle, the circuit pattern is formed with the glass epoxy resin forming the printed circuit board due to the influence of heat in the engine room. A difference in thermal expansion occurs between the copper foil and the copper foil. As a result, thermal stress is generated in the circuit pattern, and the copper foil may peel off from the glass epoxy resin or a solder crack may occur in a soldered portion.
【0008】このような不具合を防止するために、金属
板からなる芯材をガラスエポキシ樹脂でサンドイッチ状
に挟み込み、プリント回路基板自体の熱膨張を芯材で抑
え、銅箔がガラスエポキシ樹脂から剥離するのを防止す
る構成をとることも考えられる。In order to prevent such a problem, a core material made of a metal plate is sandwiched by a glass epoxy resin in a sandwich shape, the thermal expansion of the printed circuit board itself is suppressed by the core material, and the copper foil is separated from the glass epoxy resin. It is also conceivable to adopt a configuration for preventing such a situation.
【0009】[0009]
【発明が解決しようとする課題】従来のバスバーの代わ
りにプリント回路基板を用いた場合、電気接続箱内の大
電流用回路や中電流回路において発生した熱を従来のよ
うにバスバーを介して放熱することができない。又、上
述したように芯材として金属板を備えたプリント回路基
板の場合、各発熱電気部品の発生した熱は、絶縁層であ
るガラスエポキシ樹脂を介して芯材に集熱され、芯材に
おいて均熱化されるが、芯材から外部に放熱されずに芯
材に蓄熱されてしまう。When a printed circuit board is used instead of a conventional bus bar, heat generated in a large current circuit or a medium current circuit in an electric junction box is radiated through the bus bar as in the conventional case. Can not do it. Further, in the case of a printed circuit board having a metal plate as a core as described above, heat generated by each heat-generating electric component is collected by the core via a glass epoxy resin which is an insulating layer. Although the heat is soaked, heat is stored in the core material without being radiated to the outside from the core material.
【0010】更に、図4に示すように、各発熱電気部品
1に夫々、放熱フィン1fを取り付ける方法も考えられ
るが、放熱フィン1fのみでは、基板全体の熱を引くこ
とができない。又、プリント回路基板には発熱電気部品
1が多数実装されるので、発熱電気部品1が多くなる
と、それに応じて放熱フィン1fの数も増加してしま
い、部品点数や組立工数の増加につながり、コスト的に
問題が生じる。又、電気接続箱自体の小型化を図ること
ができない。更には、放熱フィン1fによって放熱され
た熱量は依然として電気接続箱内部に存在し、電気接続
箱外部に効率良く熱伝達することができない。Further, as shown in FIG. 4, a method of attaching a heat radiating fin 1f to each of the heat generating electric components 1 is also conceivable. However, the heat of the entire board cannot be removed only by the heat radiating fin 1f. Also, since a large number of heat-generating electric components 1 are mounted on the printed circuit board, if the heat-generating electric components 1 increase, the number of the radiation fins 1f increases accordingly, leading to an increase in the number of parts and the number of assembly steps. A problem arises in cost. Further, the size of the electric connection box itself cannot be reduced. Further, the amount of heat radiated by the radiation fins 1f still exists inside the electric connection box, and the heat cannot be efficiently transmitted to the outside of the electric connection box.
【0011】又、図5に示すように、プリント回路基板
の表面、即ち、ガラスエポキシ樹脂で構成される部分に
ブラケット2b等を介してヒートパイプ2を装着し、こ
の付近の電気部品(図示せず)の発熱を電気接続箱外部
に放熱することも考えられるが、この構成では、依然と
して電気部品からその付近のガラスエポキシ樹脂に伝達
された局所的な熱量しか熱伝達することができず、集熱
効率が不十分である。As shown in FIG. 5, a heat pipe 2 is mounted on the surface of a printed circuit board, that is, a portion made of glass epoxy resin via a bracket 2b or the like, and electric components (not shown) near the heat pipe 2 are mounted. Although it is conceivable to radiate the heat generated outside of the electrical junction box to the outside of the electrical junction box, in this configuration, only the local amount of heat transmitted from the electrical component to the glass epoxy resin in the vicinity can still be transmitted, and the heat is collected. Insufficient thermal efficiency.
【0012】本発明の目的は、プリント回路基板に実装
された電気部品の発熱を電気接続箱外部に効率的に放熱
できる電気接続箱を提供することにある。An object of the present invention is to provide an electric junction box which can efficiently radiate heat generated by electric components mounted on a printed circuit board to the outside of the electric junction box.
【0013】[0013]
【課題を解決するための手段】上述の目的を達成するた
めに、本発明に係る電気接続箱は、金属のコア部とコア
部をサンドイッチ状に挟み込む絶縁部とを備えた回路基
板を筐体内に収容し、この回路基板の絶縁部を一部除去
してコア部を露出させていることを特徴としている。In order to achieve the above-mentioned object, an electric junction box according to the present invention comprises a circuit board having a metal core portion and an insulating portion sandwiching the core portion in a sandwich shape. And the core portion is exposed by partially removing the insulating portion of the circuit board.
【0014】回路基板に実装されたヒューズホルダやリ
レー等の電気部品の発熱を、回路基板のコア部に集熱し
て均熱化し、露出したコア部からこの熱を放熱する。
又、本発明の請求項2に記載の電気接続箱は、露出した
コア部にヒートパイプの吸熱部を直接密着させたことを
特徴としている。回路基板に実装された様々な電気部品
の発熱を回路基板のコア部で集熱して均熱化し、ヒート
パイプを介して効率的に放熱する。The heat generated by electric components such as a fuse holder and a relay mounted on the circuit board is collected by the core portion of the circuit board to make the temperature uniform, and the heat is radiated from the exposed core portion.
The electric junction box according to a second aspect of the present invention is characterized in that the heat absorbing portion of the heat pipe is directly adhered to the exposed core portion. Heat generated by various electric components mounted on the circuit board is collected and uniformed by the core of the circuit board, and the heat is efficiently radiated through the heat pipe.
【0015】又、本発明の請求項3に記載の電気接続箱
は、露出したコア部とヒートパイプとの密着を、露出し
たコア部とヒートパイプの双方に接触する熱伝導性の良
い係止部材を用いて行うことを特徴としている。露出し
たコア部とヒートパイプとの密着部のみを介して熱伝達
を行うのではなく、熱伝導性の良い係止部材を介しても
熱伝達を行い、放熱を効率良く行う。In the electric junction box according to the third aspect of the present invention, the close contact between the exposed core portion and the heat pipe is formed by engaging both the exposed core portion and the heat pipe with good heat conductivity. It is characterized in that it is performed using a member. Rather than conducting heat transfer only through the contact portion between the exposed core portion and the heat pipe, heat transfer is also carried out through a locking member having good heat conductivity, and heat is efficiently radiated.
【0016】[0016]
【発明の実施の形態】以下、図面を参照して本発明の一
実施形態に係る電気接続箱10について説明する。本発
明の一実施形態に係る電気接続箱10は、図1に示すよ
うに、発熱電気部品やその他の電気部品を実装するプリ
ント回路基板11,12と、プリント回路基板11,1
2に部分的に密着したヒートパイプ21,22と、プリ
ント回路基板11,12に夫々取り付けられる基板ケー
ス13,14と、プリント回路基板11,12及び基板
ケース13,14とを収容し、且つヒートパイプ21,
22の放熱部を外部に延在させて保持するロアケース1
5と、ロアケース15に嵌合されるアッパーケース16
と、アッパーケース16の上部に被着されるアッパーカ
バー17等とから構成されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electric junction box 10 according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an electric connection box 10 according to one embodiment of the present invention includes printed circuit boards 11 and 12 on which heat-generating electric components and other electric components are mounted, and printed circuit boards 11 and 1.
2, heat pipes 21 and 22 that partially adhere to the printed circuit boards 2, board cases 13 and 14 attached to the printed circuit boards 11 and 12, respectively, and printed circuit boards 11 and 12 and the board cases 13 and 14. Pipe 21,
Lower case 1 for holding the heat dissipating portion 22 by extending it to the outside
5 and an upper case 16 fitted to the lower case 15
And an upper cover 17 attached to the upper part of the upper case 16.
【0017】プリント回路基板11,12は、図2に一
方の回路基板11を示すように、矩形状の回路基板11
の一側に複数のヒューズホルダ23やリレー(ヒューズ
ホルダのみ図示)等の発熱電気部品並びにその他の電気
部品が実装されており、他側には、基板ケース13との
取り付け用ブラケット11bが装着されている。又、ヒ
ートパイプ21の吸熱部21aが、プリント回路基板1
1の周縁の一部に沿って取り付けられていると共に、ヒ
ートパイプ21の放熱部21bには、細長い折曲した放
熱板21pが取り付けられている。尚、図1に示すヒー
トパイプ22の放熱板22pには、取り付け孔が穿設さ
れると共に、放熱板を保持するロアケース15のホルダ
部15hとアッパーケース16のホルダ部16hにも取
り付け孔が穿設され、熱伝導性の良いボルトによって放
熱板21p,22pをホルダ部15h,16hと共に車
体パネル(図示せず)等に取り付けるようになってい
る。As shown in FIG. 2, one of the printed circuit boards 11 and 12 is a rectangular circuit board 11.
A plurality of heat generating electrical components such as a plurality of fuse holders 23 and a relay (only a fuse holder is shown) and other electrical components are mounted on one side, and a mounting bracket 11b for mounting to the board case 13 is mounted on the other side. ing. The heat absorbing portion 21a of the heat pipe 21 is
The heat pipe 21 is attached along a part of the periphery thereof, and the heat radiating portion 21b of the heat pipe 21 is provided with an elongated bent heat radiating plate 21p. In addition, mounting holes are formed in the heat radiating plate 22p of the heat pipe 22 shown in FIG. 1, and mounting holes are also formed in the holder 15h of the lower case 15 and the holder 16h of the upper case 16 which hold the heat radiating plate. The heat radiating plates 21p and 22p are mounted on a vehicle body panel (not shown) together with the holder portions 15h and 16h by bolts having good heat conductivity.
【0018】尚、ここで使用されるヒートパイプ21,
22とは、両端を密封した金属管の中に作動液を減圧下
で封入したもので、内部の作動液が吸熱部側(プリント
回路基板への取付側)で吸熱により気化し、気化した作
動液が温度の低い放熱部側(放熱板取付側)に移動し、
放熱部での放熱により液化した後、再び吸熱部側に戻る
構成を有する公知のヒートパイプである。The heat pipes 21 used here
Reference numeral 22 denotes a valve in which a working fluid is sealed under reduced pressure in a metal tube whose both ends are sealed, and the working fluid inside is vaporized by heat absorption on the heat absorbing portion side (the side to be attached to the printed circuit board), and the vaporized operation is performed. The liquid moves to the radiating part side where the temperature is low (radiation plate mounting side),
This is a known heat pipe having a configuration in which it is liquefied by heat radiation in the heat radiating section and then returns to the heat absorbing section again.
【0019】プリント回路基板11は、図3に一部を詳
細に示すように、金属板からなるコア部11cと、コア
部11cをサンドイッチ状に挟み込んだ、ガラスエポキ
シ樹脂の絶縁層11a,11bと、絶縁層11a,11
bの表面に形成された導体パターン(図示せず)等から
構成されている。コア部11cは、例えば、アルミニウ
ム、アルミニウム合金、銅、銅合金等の、熱伝導性に優
れる金属材であればいかなるものであっても良い。As shown in detail in FIG. 3, the printed circuit board 11 has a core portion 11c made of a metal plate and insulating layers 11a and 11b made of glass epoxy resin sandwiching the core portion 11c in a sandwich shape. , Insulating layers 11a, 11
It is composed of a conductor pattern (not shown) formed on the surface of b. The core portion 11c may be made of any metal material having excellent thermal conductivity, such as aluminum, an aluminum alloy, copper, and a copper alloy.
【0020】コア部11cの表面に被覆された絶縁層1
1a,11bは、ガラスクロスにエポキシ樹脂を含浸さ
せたプリプレグである。好ましくは、エポキシ樹脂にア
ルミナ粉等が混入されているのが良い。これによって、
絶縁層11aの熱伝導率が向上し、電気部品の発熱をコ
ア部11cに効率的に伝達することができる。絶縁層表
面の導体パターンは、例えば、18〜210μmの銅箔
であり、絶縁層11aの表面に所定の回路パターンを形
成している。又、エポキシ系等の被覆材からなるレジス
ト層(図示せず)が、導電層の酸化防止とはんだ付き防
止のために更に被覆形成されている。The insulating layer 1 coated on the surface of the core portion 11c
1a and 11b are prepregs in which a glass cloth is impregnated with an epoxy resin. Preferably, alumina powder or the like is mixed in the epoxy resin. by this,
The thermal conductivity of the insulating layer 11a is improved, and the heat generated by the electric component can be efficiently transmitted to the core 11c. The conductor pattern on the surface of the insulating layer is, for example, a copper foil of 18 to 210 μm, and a predetermined circuit pattern is formed on the surface of the insulating layer 11a. In addition, a resist layer (not shown) made of a coating material such as an epoxy-based material is further coated to prevent oxidation of the conductive layer and soldering.
【0021】プリント回路基板11の一側(ヒートパイ
プ取り付け側)は所定の場所(図2では4ヶ所)で、図
3に示すように、絶縁層11aの一部が除去されてお
り、金属板からなるコア部11cが露出している。そし
て、露出したコア部11cにヒートパイプ21の吸熱部
21aが直接密着するように、ヒートパイプ21がプリ
ント回路基板11の周縁の一部に沿って取り付けられて
いる。より詳細には、図3に示すように、断面U字型を
有した可撓性のクリップ(係止部材)31が、図2に示
す露出した夫々のコア部11cにはめ込まれて、クリッ
プ31の挟持力によってヒートパイプ21をプリント回
路基板11に密着させている。尚、このクリップ31
は、例えば、アルミニウム、アルミニウム合金、銅、銅
合金等の、熱伝導性に優れる金属材料でできている。One side of the printed circuit board 11 (the side on which the heat pipe is attached) is at a predetermined place (four places in FIG. 2), and as shown in FIG. 3, a part of the insulating layer 11a is removed. Is exposed. Then, the heat pipe 21 is attached along a part of the periphery of the printed circuit board 11 so that the heat absorbing portion 21a of the heat pipe 21 directly adheres to the exposed core portion 11c. More specifically, as shown in FIG. 3, flexible clips (locking members) 31 having a U-shaped cross section are fitted into the respective exposed core portions 11c shown in FIG. The heat pipe 21 is brought into close contact with the printed circuit board 11 by the pinching force. In addition, this clip 31
Is made of a metal material having excellent thermal conductivity, such as aluminum, an aluminum alloy, copper, and a copper alloy.
【0022】次に、かかる構成に基づく作用について説
明する。プリント回路基板11上の異なる位置に実装さ
れたヒューズホルダ23やリレー等の電気部品が発生し
た熱は、図3に示す夫々の電気部品が実装された近傍領
域のエポキシ樹脂を介してコア部11cに伝達される。
コア部11cは熱伝導性に優れた金属板でできているの
で、伝達された熱はコア部11cで均熱化し、絶縁層1
1aが除去された部分からヒートパイプ21に熱伝達さ
れる。ヒートパイプ21と密着した部分でかかる熱伝達
が行われると同時に、コア部11cから熱伝導性に優れ
たクリップ31を介してヒートパイプ21に熱伝達が行
われるので、コア部11cの熱をヒートパイプ21の吸
熱部21aに効率的に熱伝達することができる。ヒート
パイプ21の吸熱部21aに伝達された熱は、図1に示
すヒートパイプ21の放熱部21b、放熱板21pを介
して放熱板21pが固定された車両のパネル(図示せ
ず)に放熱される。Next, the operation based on this configuration will be described. The heat generated by the electric components such as the fuse holder 23 and the relay mounted at different positions on the printed circuit board 11 is transferred to the core portion 11c via the epoxy resin in the vicinity area where the respective electric components are mounted as shown in FIG. Is transmitted to
Since the core portion 11c is made of a metal plate having excellent thermal conductivity, the transmitted heat is equalized by the core portion 11c, and the insulating layer 1c is formed.
Heat is transferred to the heat pipe 21 from the portion where 1a is removed. The heat transfer is performed at the portion in close contact with the heat pipe 21, and at the same time, the heat transfer is performed from the core 11 c to the heat pipe 21 via the clip 31 having excellent heat conductivity. Heat can be efficiently transferred to the heat absorbing portion 21a of the pipe 21. The heat transmitted to the heat absorbing portion 21a of the heat pipe 21 is radiated to a vehicle panel (not shown) to which the heat radiating plate 21p is fixed via the heat radiating portion 21b and the heat radiating plate 21p of the heat pipe 21 shown in FIG. You.
【0023】一方、プリント回路基板12に関しても、
上述のプリント回路基板11と同様に絶縁層の一部が除
去されて金属板からなるコア部(図示せず)が露出して
おり、この露出したコア部にクリップを介してヒートパ
イプ22の吸熱部が密着されている。そして、上述の作
用の説明と同様にプリント回路基板12に実装された電
気部品の発熱をヒートパイプ22、放熱板22pを介し
て電気接続箱10の外部に放熱する。On the other hand, regarding the printed circuit board 12,
As in the case of the above-described printed circuit board 11, a part of the insulating layer is removed to expose a core portion (not shown) made of a metal plate, and heat is absorbed by the heat pipe 22 to the exposed core portion via a clip. The parts are in close contact. Then, similarly to the above description of the operation, the heat generated by the electric components mounted on the printed circuit board 12 is radiated to the outside of the electric connection box 10 through the heat pipe 22 and the heat radiating plate 22p.
【0024】このように、回路基板11に実装されたヒ
ューズホルダやリレー等の電気部品の発熱を、回路基板
11のコア部11cに伝熱して均熱化し、露出したコア
部11cから直接に又は熱伝導性に優れたクリップ31
を介してヒートパイプ21に伝達し、ヒートパイプ21
に取り付けた放熱板21pから電気接続箱外部の車両パ
ネル等に直接放熱することができるので、従来の電気接
続箱のように、プリント回路基板の絶縁層からブラケッ
トを介してヒートパイプに熱伝達するような集熱効率の
悪い熱伝達を行わなくてすむ。又、個々の発熱電気部品
に放熱フィンを備える必要がないので、部品点数の削減
を図ることができ、組立工数の低減やコストダウンに貢
献する。更には、プリント回路基板への電気部品の高密
度実装が可能となるので、電気接続箱自体の小型化も図
ることができる。As described above, the heat generated by the electric components such as the fuse holder and the relay mounted on the circuit board 11 is transferred to the core portion 11c of the circuit board 11 so as to equalize the temperature and directly or directly from the exposed core portion 11c. Clip 31 with excellent thermal conductivity
To the heat pipe 21 via the
Since heat can be directly radiated from the heat radiating plate 21p attached to the vehicle to a vehicle panel or the like outside the electric connection box, heat is transferred from the insulating layer of the printed circuit board to the heat pipe via the bracket as in the conventional electric connection box. It is not necessary to perform such poor heat transfer efficiency. In addition, since it is not necessary to provide a radiation fin for each heat generating electric component, the number of components can be reduced, which contributes to a reduction in the number of assembly steps and cost. Further, since high-density mounting of electric components on a printed circuit board becomes possible, the size of the electric connection box itself can be reduced.
【0025】又、プリント回路基板が金属板で構成され
たコア部を有しているので、熱影響によって導体パター
ンがプリント回路基板から剥離する不具合が生じにく
く、電気接続箱を車両のエンジンルーム等の温度的に厳
しい場所に搭載することができる。尚、上述の実施形態
と異なり、クリップをプリント回路基板にビス等で固定
しても良い。又、発熱電気部品は、ヒューズホルダ、リ
レー等に限らず、コンデンサやトランス等の様々なもの
を含んで良いことは言うまでもない。Further, since the printed circuit board has a core portion made of a metal plate, it is difficult for the conductor pattern to peel off from the printed circuit board due to the influence of heat. It can be mounted in places where temperature is severe. Note that, unlike the above-described embodiment, the clip may be fixed to the printed circuit board with screws or the like. Further, it goes without saying that the heat-generating electric components are not limited to fuse holders and relays, but may include various components such as capacitors and transformers.
【0026】[0026]
【発明の効果】以上説明したように、本発明に係る電気
接続箱は、金属のコア部とコア部をサンドイッチ状に挟
み込む絶縁部とを備えた回路基板を筐体内に収容すると
共に、回路基板の絶縁部が一部除去されてコア部が露出
していることを特徴としている。As described above, the electric junction box according to the present invention accommodates a circuit board having a metal core portion and an insulating portion sandwiching the core portion in a sandwich manner in a housing, and also includes a circuit board. Is characterized in that the insulating portion is partially removed to expose the core portion.
【0027】回路基板に実装されたヒューズホルダやリ
レー等の電気部品の発熱を、回路基板のコア部に集熱し
て均熱化し、露出したコア部からこの熱を放熱すること
ができる。従って、従来の電気接続箱のように、個々の
発熱電気部品に放熱フィンを備える必要がなく、電気部
品の高密度実装が可能となり、回路パターン幅の低減も
図ることができる。Heat generated by electric components such as a fuse holder and a relay mounted on the circuit board can be collected by the core of the circuit board to be uniform, and the heat can be radiated from the exposed core. Therefore, unlike the conventional electric connection box, it is not necessary to provide a heat radiation fin for each heat-generating electric component, and high-density mounting of the electric component is possible, and the width of the circuit pattern can be reduced.
【0028】又、本発明の請求項2に記載の電気接続箱
は、露出したコア部にヒートパイプの吸熱部を直接密着
させたことを特徴としている。回路基板に実装された様
々な電気部品の発熱を回路基板のコア部で集熱して均熱
化し、ヒートパイプを介して効率的に放熱する。従っ
て、電気接続箱の小型化が可能となると共に、耐久性を
向上させることができる。Further, the electric junction box according to the second aspect of the present invention is characterized in that the heat absorbing portion of the heat pipe is directly adhered to the exposed core portion. Heat generated by various electric components mounted on the circuit board is collected and uniformed by the core of the circuit board, and the heat is efficiently radiated through the heat pipe. Therefore, the size of the electric connection box can be reduced, and the durability can be improved.
【0029】又、本発明の請求項3に記載の電気接続箱
は、露出したコア部とヒートパイプとの密着を、露出し
たコア部とヒートパイプの双方に接触する熱伝導性の良
い係止部材を用いて行うことを特徴としている。露出し
たコア部とヒートパイプとの密着部のみを介して熱伝達
を行うのではなく、熱伝導性の良い係止部材を介しても
熱伝達を行い、放熱を効率良く行う。従って、電気接続
箱の製品品質をより一層向上させることができる。In the electric connection box according to the third aspect of the present invention, the close contact between the exposed core portion and the heat pipe is formed by engaging both the exposed core portion and the heat pipe with good heat conductivity. It is characterized in that it is performed using a member. Rather than conducting heat transfer only through the contact portion between the exposed core portion and the heat pipe, heat transfer is also carried out through a locking member having good heat conductivity, and heat is efficiently radiated. Therefore, the product quality of the electric junction box can be further improved.
【図1】本発明の一実施形態に係る電気接続箱10を概
略的に示す分解斜視図である。FIG. 1 is an exploded perspective view schematically showing an electric junction box 10 according to an embodiment of the present invention.
【図2】図1のプリント回路基板11を拡大して示す斜
視図である。FIG. 2 is an enlarged perspective view showing a printed circuit board 11 of FIG.
【図3】図2のプリント回路基板11とヒートパイプ2
1との密着部を部分的に示す詳細斜視図である。FIG. 3 shows the printed circuit board 11 and the heat pipe 2 of FIG.
FIG. 3 is a detailed perspective view partially showing a close contact portion with the device 1;
【図4】放熱フィン1fを備えた従来の発熱電気部品1
を示す斜視図である。FIG. 4 shows a conventional heat-generating electric component 1 having a radiation fin 1f.
FIG.
【図5】ブラケット2bを介してプリント回路基板に取
り付けられたヒートパイプ2を示す斜視図である。FIG. 5 is a perspective view showing a heat pipe 2 attached to a printed circuit board via a bracket 2b.
10 電気接続箱 11 プリント回路基板 11a,11b 絶縁層 11c コア部 12 プリント回路基板 21 ヒートパイプ 21b 放熱部 21p 放熱板 23 ヒューズホルダ 31 クリップ DESCRIPTION OF SYMBOLS 10 Electric connection box 11 Printed circuit board 11a, 11b Insulating layer 11c Core part 12 Printed circuit board 21 Heat pipe 21b Heat radiating part 21p Heat radiating plate 23 Fuse holder 31 Clip
Claims (3)
チ状に挟み込む絶縁部とを備えた回路基板を筐体内に収
容した電気接続箱であって、 前記回路基板の前記絶縁部が一部除去されて前記コア部
が露出していることを特徴とする電気接続箱。1. An electric junction box in which a circuit board having a metal core portion and an insulating portion sandwiching the core portion in a sandwich shape is accommodated in a housing, wherein the insulating portion of the circuit board is partially removed. An electric connection box, wherein the core portion is exposed.
熱部を直接密着させたことを特徴とする、請求項1に記
載の電気接続箱。2. The electric junction box according to claim 1, wherein a heat absorbing portion of a heat pipe is directly adhered to the exposed core portion.
の密着を、前記露出したコア部と前記ヒートパイプの双
方に接触する熱伝導性の良い係止部材を用いて行うこと
を特徴とする、請求項2に記載の電気接続箱。3. The method according to claim 1, wherein the exposed core portion and the heat pipe are brought into close contact with each other by using a locking member having good thermal conductivity that comes into contact with both the exposed core portion and the heat pipe. The electrical junction box according to claim 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00105999A JP4234245B2 (en) | 1999-01-06 | 1999-01-06 | Electrical junction box |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP00105999A JP4234245B2 (en) | 1999-01-06 | 1999-01-06 | Electrical junction box |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000198395A true JP2000198395A (en) | 2000-07-18 |
JP4234245B2 JP4234245B2 (en) | 2009-03-04 |
Family
ID=11490981
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP00105999A Expired - Fee Related JP4234245B2 (en) | 1999-01-06 | 1999-01-06 | Electrical junction box |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4234245B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009131219A1 (en) * | 2008-04-25 | 2009-10-29 | 日本電気株式会社 | Sheet radome mounting structure |
US7612646B2 (en) | 2003-04-04 | 2009-11-03 | Yazaki Corporation | Fuse cavity structure and electric connection box |
-
1999
- 1999-01-06 JP JP00105999A patent/JP4234245B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7612646B2 (en) | 2003-04-04 | 2009-11-03 | Yazaki Corporation | Fuse cavity structure and electric connection box |
WO2009131219A1 (en) * | 2008-04-25 | 2009-10-29 | 日本電気株式会社 | Sheet radome mounting structure |
Also Published As
Publication number | Publication date |
---|---|
JP4234245B2 (en) | 2009-03-04 |
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