JP2006158074A

JP2006158074A - Electric connection box

Info

Publication number: JP2006158074A
Application number: JP2004344260A
Authority: JP
Inventors: Tomoki Kano; 智樹加納
Original assignee: Sumitomo Wiring Systems Ltd; AutoNetworks Technologies Ltd; Sumitomo Electric Industries Ltd
Current assignee: Sumitomo Wiring Systems Ltd; AutoNetworks Technologies Ltd; Sumitomo Electric Industries Ltd
Priority date: 2004-11-29
Filing date: 2004-11-29
Publication date: 2006-06-15
Anticipated expiration: 2024-11-29
Also published as: JP4649180B2

Abstract

PROBLEM TO BE SOLVED: To hold components constituting a case in a state attached surely. SOLUTION: The case comprises a heat dissipation plate 30 (first component), a frame structure 23 (second component) being attached to the heat dissipation plate 30, and a frame body 22 (third component) being attached to the heat dissipation plate 30. Under a state where the frame structure 23 is attached to the heat dissipation plate 30, fixing portion 22E of the frame body 22 is held between the heat dissipation plate 30 and the fixing portion 23E of the frame structure 23. Attachment strength between components is enhanced as compared with a case where one component is supported by only one component. COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、電気接続箱に関するものである。 The present invention relates to an electrical junction box.

自動車に搭載される電気接続箱として、回路構成体をケースに収容した構造のものがある。回路構成体は、回路基板と、回路基板の裏面に沿って配索したバスバーと、回路基板の表面側に実装されるリレー等のスイッチング部材とを備えて構成される。一方、ケースは、回路基板の周縁に沿って回路構成体を包囲するように配置される枠体と、裏面側から回路構成体を覆う放熱板と、表面側から回路構成体を覆うカバーとを備えて構成される。尚、電気接続箱としては、特許文献１に開示されているもの等がある。
特開２００３−１６４０３９公報 2. Description of the Related Art Some electrical connection boxes mounted on automobiles have a structure in which a circuit structure is housed in a case. The circuit configuration body includes a circuit board, a bus bar arranged along the back surface of the circuit board, and a switching member such as a relay mounted on the front surface side of the circuit board. On the other hand, the case includes a frame body disposed so as to surround the circuit structure body along the periphery of the circuit board, a heat sink that covers the circuit structure body from the back surface side, and a cover that covers the circuit structure body from the front surface side. It is prepared for. In addition, as an electrical junction box, there exist some which are disclosed by patent document 1. FIG.
JP 2003-164039 A

電気接続箱が自動車に搭載されるものであって、電気接続箱を構成するケースが複数の部品を組み付けた形態のものである場合、走行中の振動によって部品間にガタ付きが生じたり、部品間が分離したりすることが懸念される。
本発明は上記のような事情に基づいて完成されたものであって、ケースを構成する部品同士を確実に組み付け状態に保持することを目的とする。 When the electrical junction box is mounted on an automobile and the case constituting the electrical junction box is a form in which a plurality of parts are assembled, the parts may become loose due to vibration during traveling. There is concern about separation.
This invention is completed based on the above situations, Comprising: It aims at hold | maintaining the components which comprise a case in the assembly | attachment state reliably.

上記の目的を達成するための手段として、請求項１の発明は、回路構成体をケースに収容してなり、前記ケースが、第１の部品と、前記第１の部品に組み付けられる第２の部品と、前記第１の部品と前記第２の部品のうち少なくともいずれか一方の部品に対し、前記第１の部品と前記第２の部品の組み付け手段とは異なる組み付け手段によって組み付けられる第３の部品とを備えており、前記第１の部品と前記第２の部品を組み付けた状態では、前記第３の部品が、前記第１の部品と前記第２の部品との間に挟まれた状態に保持される構成としたところに特徴を有する。 As means for achieving the above object, the invention of claim 1 is characterized in that the circuit structure is housed in a case, and the case is assembled to the first part and the first part. A third part is assembled to a part and at least one of the first part and the second part by an assembly means different from the assembly means of the first part and the second part. In a state where the first component and the second component are assembled, the third component is sandwiched between the first component and the second component. It is characterized in that it is configured to be held on the surface.

請求項２の発明は、請求項１に記載のものにおいて、前記第３の部品において前記第１の部品と前記第２の部品によって挟まれる部分では、前記第３の部品が前記第１の部品又は前記第２の部品に対してビス止めにより固定されているところに特徴を有する。 According to a second aspect of the present invention, in the first aspect, the third component is the first component in a portion of the third component that is sandwiched between the first component and the second component. Alternatively, it is characterized in that it is fixed to the second part by screws.

＜請求項１の発明＞
第３の部品は、第１又は第２の部品に対し、第１の部品と第２の部品の組み付け手段とは異なる組み付け手段によって組み付けられた上で、さらに第１と第２の両部品の間に挟まれた状態で支持されるようになっているので、１つの部品が１つの部品のみに支持される形態で組み付けられるものに比べると、部品間の組み付け強度を高めることができる。これにより、部品間のガタ付きや部品間の分離を防止し、部品同士を確実に組み付け状態に保持することができる。 <Invention of Claim 1>
The third part is assembled to the first or second part by an assembling means different from the assembling means of the first part and the second part, and further, both the first and second parts are Since it is supported in a state of being sandwiched between them, assembling strength between components can be increased as compared with a case where one component is assembled in a form supported by only one component. Thereby, backlash between parts and separation between parts can be prevented, and the parts can be reliably held in the assembled state.

＜請求項２の発明＞
第３の部品において第１の部品と第２の部品によって挟まれる部分では、第３の部品が第１の部品又は第２の部品に対してビス止めにより固定されているので、単に第１と第２の両部品の間で挟まれている形態のものに比べると、部品間の組み付け強度が高い。 <Invention of Claim 2>
Since the third part is fixed to the first part or the second part by screwing in the portion sandwiched between the first part and the second part in the third part, The assembly strength between the parts is higher than that of the form sandwiched between the second parts.

＜実施形態１＞
以下、本発明を具体化した実施形態１を図１乃至図１８を参照して説明する。本実施形態の電気接続箱は、自動車に搭載され、バッテリ（図示せず）とランプ、オーディオ等の図示しない電装品との間に介設され、バッテリから供給される電力を各電装品に分配・供給するとともに、これら電力供給の切り替え等の制御を行うものである。尚、図においては、電気接続箱を表面側が上向きとなるように描いているが、自動車に搭載されるときには、電気接続箱は枠構成体２３が上側に位置し、第１ハウジング４０と第２ハウジング５０が下向きに開口する向きで車体に固定される。 <Embodiment 1>
A first embodiment embodying the present invention will be described below with reference to FIGS. The electrical junction box of the present embodiment is mounted on an automobile and is interposed between a battery (not shown) and electrical components (not shown) such as a lamp and an audio, and distributes power supplied from the battery to each electrical component. -While supplying, it controls such power supply switching. In the drawing, the electric connection box is drawn with the front side facing upward, but when mounted on an automobile, the electric connection box has the frame structure 23 on the upper side, and the first housing 40 and the second housing. The housing 50 is fixed to the vehicle body so as to open downward.

電気接続箱は、回路構成体１０と、回路構成体１０を収容するケース２０とを備えて構成される。
回路構成体１０は、図２に示すように、回路基板１１と、回路基板１１の裏面（図における下面）に沿って配索した複数のバスバー１２と、回路基板１１の表面側（図における上面側）に実装されるリレーなどのスイッチング部材１３と、端子金具１４を備えて構成されている。回路基板１１は、概ね方形をなし、その下端縁のうち略左半分の領域は上端縁に対して斜めをなす傾斜縁部となっている。 The electrical junction box includes a circuit structure 10 and a case 20 that houses the circuit structure 10.
As shown in FIG. 2, the circuit structure 10 includes a circuit board 11, a plurality of bus bars 12 arranged along the back surface (lower surface in the figure) of the circuit board 11, and the front surface side (upper surface in the figure). A switching member 13 such as a relay mounted on the side) and a terminal fitting 14. The circuit board 11 has a substantially rectangular shape, and a substantially left half region of the lower end edge thereof is an inclined edge portion that is inclined with respect to the upper end edge.

バスバー１２は回路基板１１の裏面に接着されており、バスバー１２の端部に形成した複数の第１端子部１５Ａが回路基板１１の前端縁から突出されているとともに、同じくバスバー１２の端部に形成した複数の第２端子部１５Ｂが回路基板１１の下端縁から突出されている。第１端子部１５Ａは、回路基板１１に対して略直角に表面側（上向き）に立ち上がる支持部１６Ａと、この支持部１６Ａの立ち上がり端から前方（回路基板１１とは反対側）へ略直角に（回路基板１１とほぼ平行に）延出する接続部１７Ａとから構成され、側方から見て略Ｌ字形をなす。この複数の第１端子部１５Ａは、回路基板１１の上端縁に沿って並列している。一方、第２端子部１５Ｂは、回路基板１１に対して略直角に表面側（上向き）に立ち上がる支持部１６Ｂと、この支持部１６Ｂの立ち上がり端から後方（回路基板１１とは反対側）へ略直角に（回路基板１１とほぼ平行に）延出する接続部１７Ｂとから構成され、側方から見て略Ｌ字形をなす。この複数の第２端子部１５Ｂは、回路基板１１の下端縁のうち傾斜縁部よりも右方の領域（上端縁と平行に領域）に沿って並列している。 The bus bar 12 is bonded to the back surface of the circuit board 11, and a plurality of first terminal portions 15 A formed at the end of the bus bar 12 protrude from the front edge of the circuit board 11, and also at the end of the bus bar 12. The plurality of formed second terminal portions 15 B protrude from the lower end edge of the circuit board 11. The first terminal portion 15A has a support portion 16A that rises to the surface side (upward) at a substantially right angle with respect to the circuit board 11, and a right angle from the rising end of the support portion 16A to the front side (the side opposite to the circuit board 11). The connection portion 17A extends (substantially parallel to the circuit board 11) and has a substantially L shape when viewed from the side. The plurality of first terminal portions 15 A are arranged in parallel along the upper edge of the circuit board 11. On the other hand, the second terminal portion 15B has a support portion 16B that rises to the surface side (upward) at a substantially right angle with respect to the circuit board 11, and a rear end (an opposite side to the circuit board 11) from the rising end of the support portion 16B. The connecting portion 17B extends at a right angle (substantially parallel to the circuit board 11), and has a substantially L shape when viewed from the side. The plurality of second terminal portions 15 B are arranged in parallel along a region on the right side of the lower edge of the circuit board 11 with respect to the inclined edge (region parallel to the upper edge).

図５に示すように、端子金具１４は、金属板材を曲げ加工したものであり、全体として前後方向に細長い形状をなす。端子金具１４の略前半領域は、第１端子部１５Ａの接続部１７Ａとほぼ同形状のヒューズ接触部１４ａとなっており、端子金具１４の略後半領域は、第２端子部１５Ｂの接続部１７Ｂと同様にタブ状をなす出力用接触部１４ｂとなっている。この端子金具１４は、後述する枠構成体２３と第１ハウジング４０に取り付けられる。 As shown in FIG. 5, the terminal fitting 14 is formed by bending a metal plate material, and has a shape elongated in the front-rear direction as a whole. A substantially first half region of the terminal fitting 14 is a fuse contact portion 14a having substantially the same shape as the connecting portion 17A of the first terminal portion 15A, and a substantially second half region of the terminal fitting 14 is a connecting portion 17B of the second terminal portion 15B. The output contact portion 14b has a tab-like shape. The terminal fitting 14 is attached to a frame structure 23 and a first housing 40 which will be described later.

図１、図３に示すように、ケース２０は、合成樹脂等の絶縁材料からなる枠体２１と、枠体２１に対しその裏側の開口を塞ぐように固着される金属製の放熱板３０と、枠体２１に対しその表面側（放熱板３０とは反対側）の開口を塞ぐように組み付けられる合成樹脂製のカバー６０と、枠体２１に組み付けられる合成樹脂製の第１ハウジング４０と、枠体２１に組み付けられる合成樹脂製の第２ハウジング５０とを備えている。 As shown in FIGS. 1 and 3, the case 20 includes a frame body 21 made of an insulating material such as a synthetic resin, and a metal radiator plate 30 fixed to the frame body 21 so as to close the opening on the back side thereof. A synthetic resin cover 60 assembled to the frame body 21 so as to close the opening on the surface side (opposite side of the heat dissipation plate 30), and a synthetic resin first housing 40 assembled to the frame body 21; And a second housing 50 made of synthetic resin to be assembled to the frame body 21.

枠体２１は、図４に示すように、枠本体２２と、ヒューズボックスとして機能する枠構成体２３との２部品を合体させて構成され、回路基板１１の周縁に沿って回路構成体１０を全周に亘って連続して包囲するように配置されているとともに、放熱板３０の表面に接着剤（図示せず）により固定されている。枠本体２２は、回路基板１１の周縁のうち下端縁及び左右両側縁に沿うように概ね「コ」字形をなす。詳しくは、枠本体２２の後枠部２２Ｂの略左半分領域は、回路基板１１の下端縁の傾斜縁部に沿うように、枠本体２２の左右両枠部２２Ｌ，２２Ｒに対して斜めを向いた傾斜枠部２２Ｓとなっている。また、後枠部２２Ｂのうち傾斜枠部２２Ｓよりも右方の領域は、第２端子部１５Ｂよりも後方に位置する。 As shown in FIG. 4, the frame body 21 is configured by combining two parts of a frame main body 22 and a frame structure body 23 that functions as a fuse box, and the circuit structure body 10 is formed along the periphery of the circuit board 11. It arrange | positions so that it may surround continuously over the perimeter, and it is being fixed to the surface of the heat sink 30 with the adhesive agent (not shown). The frame body 22 has a generally “U” shape along the lower edge and the left and right edges of the periphery of the circuit board 11. Specifically, the substantially left half region of the rear frame portion 22B of the frame body 22 is inclined with respect to the left and right frame portions 22L and 22R of the frame body 22 so as to follow the inclined edge portion of the lower end edge of the circuit board 11. The inclined frame portion 22S. Further, a region on the right side of the inclined frame portion 22S in the rear frame portion 22B is located behind the second terminal portion 15B.

枠本体２２には、図４に示すように、その左右両枠部２２Ｌ，２２Ｒの前端部同士（即ち、枠本体２２における枠構成体２３との連結端部同士）を連結した形態の第１連結部２４Ａが形成されている。この第１連結部２４Ａは、第１端子部１５Ａの支持部１６Ａに対して後方（回路基板１１側であり、接続部１７Ａとは反対側）から当接するように位置する。この第１連結部２４Ａには、各支持部１６Ａと対応するように第１連結部２４Ａの長さ方向と直角な板状の補強部２５が複数形成されている。また、枠本体２２には、右枠部２２Ｒの後端に近い位置と傾斜枠部２２Ｓのほぼ中央位置とを連結した形態であって、後枠部２２Ｂと略平行をなす第２連結部２４Ｂが形成されている。第２連結部２４Ｂは、第２端子部１５Ｂの支持部１６Ｂに対して前方（回路基板１１側であり、接続部１７Ｂとは反対側）から当接するように位置する。 As shown in FIG. 4, the frame main body 22 is connected to the front end portions of the left and right frame portions 22 L and 22 R (that is, the connection end portions of the frame main body 22 to the frame structure 23). A connecting portion 24A is formed. The first connecting portion 24A is positioned so as to come into contact with the support portion 16A of the first terminal portion 15A from behind (from the circuit board 11 side and opposite to the connection portion 17A). A plurality of plate-like reinforcing portions 25 perpendicular to the length direction of the first connecting portion 24A are formed on the first connecting portion 24A so as to correspond to the support portions 16A. Further, the frame body 22 has a form in which a position close to the rear end of the right frame portion 22R and a substantially central position of the inclined frame portion 22S are connected, and a second connecting portion 24B that is substantially parallel to the rear frame portion 22B. Is formed. The second connecting portion 24B is positioned so as to come into contact with the support portion 16B of the second terminal portion 15B from the front (on the side of the circuit board 11 and opposite to the connection portion 17B).

図３に示すように、この枠本体２２における左右両枠部２２Ｌ，２２Ｒの前端部には、下面（裏面）が放熱板３０に接着されるようになっているとともに、上面（表面）が平坦状とされた取付部２２Ｅが形成されている。この取付部２２Ｅには、軸線を上下方向に向けた雌ネジ孔２２Ｈが形成されている。 As shown in FIG. 3, a lower surface (back surface) is bonded to the heat radiating plate 30 at the front end portions of the left and right frame portions 22L and 22R in the frame body 22, and an upper surface (front surface) is flat. A mounting portion 22E is formed. The mounting portion 22E is formed with a female screw hole 22H whose axis is directed in the vertical direction.

枠構成体２３は、回路基板１１の上端縁に沿って配置され、接着剤（図示せず）により放熱板３０の表面に固着されているとともに、接着剤（図示せず）により枠本体２２に固着されている。枠構成体２３内には、前後方向に貫通する複数のキャビティ２６Ａ，２６Ｂが上下２段に分かれて左右方向に並列して形成されており（図４参照）、第１端子部１５Ａの接続部１７Ａが、下段側のキャビティ２６Ｂに対して後方から挿入されている。挿入された第１端子部１５Ａは、接続部１７Ａの係止孔１８Ａをキャビティ２６Ｂのランス２７Ｂに係止させることで、抜止め状態に保持されている。そして、枠構成体２３のうち、下段側のキャビティ２６Ｂよりも下方の部分２３Ａが、第１端子部１５Ａの接続部１７Ａよりも裏面側（即ち、接続部１７Ａと放熱板３０との間）に配置されることになる。
枠構成体２３の表面（上面）には、上方及び後方（回路基板１１側）へ開放された横長で浅く凹まされた嵌合凹部７０が形成されている。嵌合凹部７０の前面壁からは、幅寸法が嵌合凹部７０よりも狭く後方へ板状に延出した形態の当接部７１が形成されており、この当接部７１には、その後端縁から前方へ左右一対のスリットを切り込むことにより上下方向へ弾性撓み可能なロックアーム２３Ｂが形成されている。 The frame structure 23 is disposed along the upper edge of the circuit board 11 and is fixed to the surface of the heat sink 30 with an adhesive (not shown), and is attached to the frame body 22 with an adhesive (not shown). It is fixed. In the frame structure 23, a plurality of cavities 26A and 26B penetrating in the front-rear direction are formed in two upper and lower stages and are arranged in parallel in the left-right direction (see FIG. 4), and the connection portion of the first terminal portion 15A 17A is inserted into the lower cavity 26B from behind. The inserted first terminal portion 15A is held in a retaining state by locking the locking hole 18A of the connecting portion 17A to the lance 27B of the cavity 26B. In the frame structure 23, a portion 23A below the lower-side cavity 26B is located on the back side (that is, between the connection portion 17A and the heat sink 30) from the connection portion 17A of the first terminal portion 15A. Will be placed.
On the front surface (upper surface) of the frame structure 23, a fitting recess 70 is formed which is horizontally long and shallowly recessed open upward and rearward (circuit board 11 side). From the front wall of the fitting recess 70, a contact portion 71 having a width narrower than that of the fitting recess 70 and extending rearward in a plate shape is formed. A lock arm 23 B that is elastically bent in the vertical direction by cutting a pair of left and right slits forward from the edge is formed.

この枠構成体２３の左右両端部には、後方へ片持ち状に突出する板状の取付部２３Ｅが形成されている。この取付部２３Ｅの上面（表面）と下面（裏面）は平坦状態とされている。また、取付部２３Ｅには、軸線を上下方向に向けた取付孔２３Ｈが貫通して形成されている（図４参照）。 At both left and right end portions of the frame structure 23, plate-like attachment portions 23E that protrude rearward in a cantilevered manner are formed. The upper surface (front surface) and the lower surface (back surface) of the mounting portion 23E are in a flat state. Further, the mounting portion 23E is formed with a mounting hole 23H penetrating in the vertical direction (see FIG. 4).

放熱板３０は、回路基板１１と概ね相似形であり、且つ回路基板１１よりも一回り大きい形状をなす板本体３１と、板本体３１の前端縁から裏面側前方へ段差状に延出した形態の板状のブラケット３２とを一体形成したものである（図３参照）。板本体３１の表面には、バスバー１２の裏面が接着剤（図示せず）により固着され、固着された状態では、回路基板１１とバスバー１２（端子部１５Ａ，１５Ｂを含む）は、放熱板３０の周縁から外側へ突出することがなく、放熱板３０の表裏方向（上下方向）に視た投影面内に配置される。ブラケット３２は、ボルト（図示せず）により車体に固定される。 The heat sink 30 is generally similar to the circuit board 11 and has a plate main body 31 that is slightly larger than the circuit board 11 and a shape extending from the front edge of the plate main body 31 to the front side of the back surface in a stepped shape. The plate-shaped bracket 32 is integrally formed (see FIG. 3). The back surface of the bus bar 12 is fixed to the front surface of the plate body 31 with an adhesive (not shown). In the fixed state, the circuit board 11 and the bus bar 12 (including the terminal portions 15A and 15B) are connected to the heat sink 30. It is arrange | positioned in the projection surface seen from the front-and-back direction (up-down direction) of the heat sink 30, without projecting outside from the periphery. The bracket 32 is fixed to the vehicle body by bolts (not shown).

図１、図５に示すように、第１ハウジング４０は、後方に開口する左右２つの筒状嵌合部４１と、前方に突出する横長の嵌合板部４３とを有している。ロック突起４２とを有している。第１ハウジング４０には、複数の端子金具１４が、その出力用接触部１４ｂを前方から圧入させることによって組み付けられ、組み付け状態では、出力用接触部１４ｂが筒状嵌合部４１内に収容されるとともに、ヒューズ接触部１４ａが第１ハウジング４０から前方に突出されている。嵌合板部４３には、その上面を浅く凹ませた形態の逃がし凹部４４が形成され、この逃がし凹部４４の上面にはロック突起４２が形成されている。さらに、第１ハウジング４０には、筒状嵌合部４１の下端における後縁及び左右両縁に沿って外向き水平（枠体２１に対するカバー６０の組付け方向と直角な方向）に張り出す係止部４６が形成されている。この係止部４６は、両筒状嵌合部４１の間の領域及び筒状嵌合部４１よりも外側方の領域にも形成されている。 As shown in FIGS. 1 and 5, the first housing 40 has two left and right cylindrical fitting portions 41 that open rearward, and a horizontally long fitting plate portion 43 that protrudes forward. And a locking projection 42. A plurality of terminal fittings 14 are assembled to the first housing 40 by press-fitting the output contact portions 14b from the front. In the assembled state, the output contact portions 14b are accommodated in the cylindrical fitting portions 41. In addition, the fuse contact portion 14 a protrudes forward from the first housing 40. The fitting plate portion 43 is formed with an escape recess 44 having a shallow upper surface, and a lock protrusion 42 is formed on the upper surface of the escape recess 44. Further, the first housing 40 extends outwardly horizontally (in a direction perpendicular to the assembly direction of the cover 60 with respect to the frame body 21) along the rear edge and the left and right edges at the lower end of the cylindrical fitting portion 41. A stop 46 is formed. The locking portion 46 is also formed in a region between the two cylindrical fitting portions 41 and a region outside the cylindrical fitting portion 41.

かかる第１ハウジング４０は枠構成体２３に対して後方から組み付けられる。組み付けの過程では、ヒューズ接触部１４ａが枠構成体２３の上段側のキャビティ２６Ａに後方から差し込まれ、その係止孔１４ｃにキャビティ２６Ａ内のランス２７Ａを係止させることで、抜止め状態に保持されている。また、組付けの過程では、嵌合板部４３が嵌合凹部７０に対して上下左右方向（組付け方向と直交する方向）へのガタつきなく嵌合される。また、当接部７１が逃がし凹部４４に嵌合され、ロックアーム２３ｂが上方へ弾性撓みしつつロック突起４２を乗り越え、第１ハウジング４０と枠構成体２３が正規の組付け状態に至ると、ロックアーム２３Ｂが弾性復帰してロック突起４２に係止し、もって、第１ハウジング４０は枠構成体２３に対して組付け状態にロックされている。組み付けられた第１ハウジング４０は、第１端子部１５Ａよりも表面側（回路基板１１とは反対側）に位置する。 The first housing 40 is assembled to the frame structure 23 from the rear. In the assembling process, the fuse contact portion 14a is inserted into the upper cavity 26A of the frame structure 23 from the rear, and the lance 27A in the cavity 26A is locked in the locking hole 14c, thereby maintaining the retaining state. Has been. Further, in the assembly process, the fitting plate portion 43 is fitted to the fitting recess 70 without backlash in the vertical and horizontal directions (direction orthogonal to the assembling direction). Further, when the contact portion 71 is fitted into the relief recess 44, the lock arm 23b elastically bends upward and gets over the lock projection 42, and the first housing 40 and the frame structure 23 reach a normal assembled state, The lock arm 23 B is elastically restored and locked to the lock protrusion 42, so that the first housing 40 is locked in the assembled state with respect to the frame structure 23. The assembled first housing 40 is located on the surface side (the side opposite to the circuit board 11) from the first terminal portion 15A.

この第１ハウジング４０の左右両端部には、外側方へ片持ち状に突出する板状の取付部４０Ｅが形成されている。この取付部４０Ｅの上面（表面）には、後述するカバー６０の取付部６０Ｅを嵌合させるための凹み部４０Ｄが形成されている。取付部４０Ｅの下面（裏面）は平坦状とされている。また取付部４０Ｅには、軸線を上下方向に向けた一対の取付孔４０Ｈが貫通して形成されている。 At both left and right end portions of the first housing 40, plate-like attachment portions 40E that protrude in a cantilevered manner are formed. On the upper surface (front surface) of the mounting portion 40E, a recessed portion 40D for fitting a mounting portion 60E of the cover 60 described later is formed. The lower surface (back surface) of the mounting portion 40E is flat. In addition, a pair of mounting holes 40H whose axis is directed in the vertical direction are formed through the mounting portion 40E.

上記した枠構成体２３には、上段側のキャビティ２６Ａと下段側のキャビティ２６Ｂに連通するヒューズ収容空間２８が形成されており、このヒューズ収容空間２８内においては、下段側に位置する第１端子部１５Ａの接続部１７Ａと上段側に位置する端子金具１４のヒューズ接触部１４ａとがヒューズ（図示せず）によって接続されている。 The frame structure 23 is formed with a fuse accommodating space 28 communicating with the upper cavity 26A and the lower cavity 26B. In the fuse accommodating space 28, a first terminal located on the lower stage side is formed. The connecting portion 17A of the portion 15A and the fuse contact portion 14a of the terminal fitting 14 located on the upper stage side are connected by a fuse (not shown).

図４に示すように、第２ハウジング５０は、後方に開口するとともに、左右に仕切られた２つの筒状嵌合部５１を有する。第２ハウジング５０は、枠本体２２の後枠部２２Ｂにおける傾斜枠部２２Ｓよりも右方の領域（第２連結部２４Ｂと略平行な領域）の表面に組み付けられ、第２ハウジング５０の左右両端部においてビス（図示せず）により固定されている。組付けの過程では、第２端子部１５Ｂの接続部１７Ｂが第２ハウジング５０に対して前方から相対的に貫通され、組付け状態では、接続部１７Ｂが筒状嵌合部５１内に収容されている。また、第２ハウジング５０は第２連結部２４Ｂよりも後方に位置する。 As shown in FIG. 4, the second housing 50 has two cylindrical fitting portions 51 that are opened rearward and partitioned left and right. The second housing 50 is assembled to the surface of a region on the right side of the inclined frame portion 22S in the rear frame portion 22B of the frame body 22 (a region substantially parallel to the second connecting portion 24B). The part is fixed by screws (not shown). In the assembling process, the connecting portion 17B of the second terminal portion 15B is relatively penetrated from the front with respect to the second housing 50, and in the assembled state, the connecting portion 17B is accommodated in the cylindrical fitting portion 51. ing. Further, the second housing 50 is located behind the second connecting portion 24B.

図６に示すように、カバー６０は、全体として回路基板１１とほぼ相似形であって、回路基板１１よりも一回り大きい形状をなす。カバー６０には、第１ハウジング４０の２つの筒状嵌合部４１との干渉を回避するために前端縁を方形に切欠した形態の左右一対の切欠部６１が形成されている。この切欠部６１の開口縁部は、第１ハウジング４０の係止部４６に対して上から（即ち、枠構成体２３に対する第１ハウジング４０の組付け方向と直角な方向から）当接する押え部６５となっている。また、カバー６０の前端縁における左右両端部は、枠本体２２の取付部２２Ｈに対して上から（即ち、枠構成体２３に対する第１ハウジング４０の組付け方向と直角な方向から）当接又は接近して対抗する覆い部６２となっている。 As shown in FIG. 6, the cover 60 as a whole is substantially similar to the circuit board 11 and has a shape that is slightly larger than the circuit board 11. The cover 60 is formed with a pair of left and right cutout portions 61 having a front end edge cut into a square shape in order to avoid interference with the two cylindrical fitting portions 41 of the first housing 40. The opening edge portion of the cutout portion 61 abuts against the locking portion 46 of the first housing 40 from above (that is, from a direction perpendicular to the assembly direction of the first housing 40 with respect to the frame structure 23). 65. Further, the left and right end portions of the front edge of the cover 60 are in contact with the attachment portion 22H of the frame body 22 from above (that is, from a direction perpendicular to the assembly direction of the first housing 40 with respect to the frame structure 23). It is the cover part 62 which approaches and opposes.

また、カバー６０の前端縁には、表面側へ略Ｌ字形に立ち上がる取付部６０Ｅが左右一対形成され、各取付部６０Ｅには、軸線を上下方向に向けた取付孔６０Ｈが形成されている。さらに、カバー６０の左右両側縁には、前後方向に細長く延びる係止リブ６３が形成され、係止リブ６３には、弾性係止片６４が形成されている。かかるカバー６０は、表面側から枠体２１に対して組み付けられ、係止リブ６３の弾性係止片６４が枠本体２２の左右両外側面の係止突起２９に係止することで、カバー６０が組付け状態に対して組付け状態にロックされる。 A pair of left and right mounting portions 60E that rise substantially L-shaped toward the front surface is formed on the front edge of the cover 60, and each mounting portion 60E has a mounting hole 60H whose axis is directed in the vertical direction. Furthermore, locking ribs 63 that are elongated in the front-rear direction are formed on the left and right edges of the cover 60, and elastic locking pieces 64 are formed on the locking ribs 63. The cover 60 is assembled to the frame body 21 from the front side, and the elastic locking pieces 64 of the locking rib 63 are locked to the locking protrusions 29 on the left and right outer surfaces of the frame main body 22, thereby the cover 60. Is locked to the assembled state relative to the assembled state.

次に、電気接続箱の組み付け手順を説明する。
組付けに際しては、まず、スイッチング部材１３が実装されていない回路基板１１とバスバー１２を接着剤（図示せず）により固着し、次いでバスバー１２と放熱板３０を接着する。このとき、回路基板１１にはスイッチング部材１３が実装されていないので、回路基板１１の表面を広い領域に亘って押圧することにより、バスバー１２と放熱板３０とを強固に接着させることができる。 Next, a procedure for assembling the electrical junction box will be described.
When assembling, first, the circuit board 11 on which the switching member 13 is not mounted and the bus bar 12 are fixed by an adhesive (not shown), and then the bus bar 12 and the heat dissipation plate 30 are bonded. At this time, since the switching member 13 is not mounted on the circuit board 11, the bus bar 12 and the radiator plate 30 can be firmly bonded by pressing the surface of the circuit board 11 over a wide area.

次に、回路基板１１にスイッチング部材１３を実装し（図２及び図８を参照）、これにより、回路構成体１０が概ね組み上がる（図３及び図９を参照）。この後、放熱板３０に対し、表面側から枠本体２２を接近させつつ接着剤（図示せず）により固着する（図４及び図１０を参照）。このとき、枠本体２２の取付部２２Ｅの下面が放熱板３０の上面に密着される。枠本体２２が固着された後、枠本体２２に対し前方から枠構成体２３を接近させつつ組み付けることで、下段側のキャビティ２６Ｂに第１端子部１５Ａの接続部１７Ａを挿入させるとともに、枠構成体２３のうち下段側のキャビティ２６Ｂよりも裏面側の部分２３Ａを第１端子部１５Ａと放熱板３０との間の空間（第１端子部１５Ａよりも裏面側の空間）に配置させる（図５及び図１１を参照）。枠構成体２３の組付け時に、枠構成体２３と放熱板３０とが接着剤（図示せず）により固着されるとともに、枠構成体２３と枠本体２２とが接着剤（図示せず）により固着され、もって、枠体２１が構成される。尚、本実施形態では、枠本体２２を枠構成体２３よりも先に組み付けたが、枠本体２２よりも先に枠構成体２３を組み付けてもよい。 Next, the switching member 13 is mounted on the circuit board 11 (see FIG. 2 and FIG. 8), whereby the circuit structure 10 is assembled generally (see FIG. 3 and FIG. 9). Thereafter, the frame main body 22 is brought close to the heat radiating plate 30 from the surface side by an adhesive (not shown) (see FIGS. 4 and 10). At this time, the lower surface of the attachment portion 22 E of the frame body 22 is in close contact with the upper surface of the heat sink 30. After the frame body 22 is fixed, the frame structure 23 is assembled while approaching the frame body 22 from the front, so that the connection portion 17A of the first terminal portion 15A is inserted into the cavity 26B on the lower side, and the frame structure A portion 23A on the back side of the cavity 26B on the lower side of the body 23 is disposed in a space between the first terminal portion 15A and the heat sink 30 (a space on the back side of the first terminal portion 15A) (FIG. 5). And FIG. 11). At the time of assembling the frame structure 23, the frame structure 23 and the heat sink 30 are fixed by an adhesive (not shown), and the frame structure 23 and the frame body 22 are bonded by an adhesive (not shown). As a result, the frame 21 is formed. In the present embodiment, the frame body 22 is assembled before the frame body 23, but the frame body 23 may be assembled before the frame body 22.

さて、上記のように回路基板１１を全周に亘って包囲する枠体２１が構成されるとともに、回路基板１１とバスバー１２を裏面側から覆う放熱板３０が枠体２１に固定された後は、枠体２１と放熱板３０とによって構成された凹部内に防水用の充填材（図示せず）を注入する。充填材は、バスバー１２における第１端子部１５Ａと第２端子部１５Ｂとを除いた領域（即ち、回路基板１１の裏面に沿って配索されている領域）と、回路基板１１の全体と、回路基板１１におけるスイッチング部材１３との接触部分を覆い隠す。これにより、回路基板１１とバスバー１２とスイッチング部材１３の導通部分に対する浸水や異物の干渉が防止される。 Now, after the frame body 21 that surrounds the circuit board 11 over the entire circumference is configured as described above, and after the heat sink 30 that covers the circuit board 11 and the bus bar 12 from the back side is fixed to the frame body 21, A waterproof filler (not shown) is injected into the recess formed by the frame body 21 and the heat sink 30. The filler is a region of the bus bar 12 excluding the first terminal portion 15A and the second terminal portion 15B (that is, a region routed along the back surface of the circuit board 11), the entire circuit board 11, The contact portion of the circuit board 11 with the switching member 13 is covered. This prevents water from entering the conductive portions of the circuit board 11, the bus bar 12, and the switching member 13, and foreign matter interference.

この後は、枠構成体２３に対して第１ハウジング４０を組み付けるとともに、端子金具１４のヒューズ接触部１４ａを上段側のキャビティ２６Ａ内に挿入させ、枠構成体２３のロックアーム２３Ｂとロック突起４２との係止により、第１ハウジング４０と枠構成体２３を組付け状態にロックする。組み付け状態では、第１ハウジング４０の取付部４０Ｅが枠構成体２３の嵌合凹部７０の上面に載置される。また、この第１ハウジング４０の組付けと前後して、第２ハウジング５０を枠本体２２に組み付けるとともに、第２端子部１５Ｂを第２ハウジング５０に取り付け、ビス（図示せず）により第２ハウジング５０と枠本体２２とを組付け状態にロックする（図６及び図１２を参照）。 Thereafter, the first housing 40 is assembled to the frame structure 23, and the fuse contact portion 14a of the terminal fitting 14 is inserted into the upper cavity 26A, so that the lock arm 23B and the lock protrusion 42 of the frame structure 23 are inserted. The first housing 40 and the frame structure 23 are locked in the assembled state. In the assembled state, the attachment portion 40 E of the first housing 40 is placed on the upper surface of the fitting recess 70 of the frame structure 23. Further, before and after the assembly of the first housing 40, the second housing 50 is assembled to the frame body 22, and the second terminal portion 15B is attached to the second housing 50, and the second housing is formed by screws (not shown). 50 and the frame body 22 are locked in the assembled state (see FIGS. 6 and 12).

最後に、カバー６０を表面側から枠体２１に組み付け、弾性係止片６４と係止突起２９の係止により、カバー６０と枠体２１とを組付け状態にロックする。 Finally, the cover 60 is assembled to the frame body 21 from the front side, and the cover 60 and the frame body 21 are locked in the assembled state by the engagement of the elastic locking pieces 64 and the locking projections 29.

さて、上記の組み付け工程において、放熱板３０に枠本体２２と枠構成体２３が接着された状態（組み付けられた状態）では、枠本体２２（本発明の構成要件である第３の部品）が、放熱板３０（本発明の構成要件である第１の部品）に固着された上に、さらに枠本体２２の取付部２２Ｅが放熱板３０と枠構成体２３（本発明の構成要件である第２部品）の取付部２３Ｅとの間で上下に挟まれた状態となるので、枠本体２２と枠構成体２３と放熱板３０が強固に組み付けられることになる。しかも、枠構成体２３の取付孔２３Ｈに貫通させたビスＶが枠本体２２の取付孔２２Ｅの雌ネジ孔２２Ｈに螺合されることによって、両取付部２２Ｅ，２３Ｅが強固に固定されているので、枠本体２２の取付部２２Ｅが単に挟まれているだけの場合と比較すると、組み付け強度が高い。 Now, in the above assembly process, in a state where the frame main body 22 and the frame structure 23 are bonded to the heat radiating plate 30 (an assembled state), the frame main body 22 (the third component which is a constituent requirement of the present invention) In addition, the mounting portion 22E of the frame main body 22 is fixed to the heat radiating plate 30 (the first component which is a constituent element of the present invention), and the heat sink 30 and the frame constituent body 23 (the first component which is a constituent element of the present invention). 2), the frame main body 22, the frame structure 23, and the heat dissipation plate 30 are firmly assembled. In addition, the screws V penetrated through the mounting holes 23H of the frame structure 23 are screwed into the female screw holes 22H of the mounting holes 22E of the frame main body 22, whereby the mounting portions 22E and 23E are firmly fixed. Therefore, compared with the case where the attachment part 22E of the frame main body 22 is simply pinched, the assembly strength is high.

また、カバー６０を枠体２１に組み付けた状態では、カバー６０により、回路基板１１とスイッチング部材１３が覆い隠される。また、第１ハウジング４０（本発明の構成要件である第３の部品）が、枠体２１（本発明の構成要件である第１の部品）に組み付けられた上に、さらに第１ハウジング４０の係止部４６が枠体２１とカバー６０（本発明の構成要件である第２部品）の押え部６５との間で上下に挟まれた状態となるので、枠体２１と第１ハウジング４０とカバー６０が強固に組み付けられることになる。 Further, in the state where the cover 60 is assembled to the frame body 21, the circuit board 11 and the switching member 13 are obscured by the cover 60. In addition, the first housing 40 (third component which is a constituent element of the present invention) is assembled to the frame body 21 (first component which is a constituent element of the present invention), and further the first housing 40 Since the locking portion 46 is sandwiched between the frame body 21 and the pressing portion 65 of the cover 60 (second component which is a constituent element of the present invention), the frame body 21 and the first housing 40 The cover 60 is firmly assembled.

同じく、カバー６０を枠体２１に組み付けた状態では、第１ハウジング４０（本発明の構成要件である第３の部品）が、枠構成体２３（本発明の構成要件である第１の部品）に固着された上に、さらに第１ハウジング４０の取付部４０Ｅが枠構成体２３の嵌合凹部７０とカバー６０（本発明の構成要件である第２部品）の取付部６０Ｅとの間で上下に挟まれた状態となるので、第１ハウジング４０と枠構成体２３とカバー６０が強固に組み付けられる。
しかも、カバー６０の取付孔６０Ｈに貫通させたビスＶが、第１ハウジング４０の取付孔４０Ｈを貫通して枠構成体２３の雌ネジ孔７３に螺合されることによって、両取付部２３Ｅ，６０Ｅが枠構成体２３に対して強固に固定されているので、第１ハウジング４０の取付部４０Ｅが単に挟まれているだけの場合と比較すると、組み付け強度が高い。 Similarly, in a state in which the cover 60 is assembled to the frame body 21, the first housing 40 (third component which is a constituent element of the present invention) is replaced by the frame structure body 23 (first component which is a constituent element of the present invention). In addition, the mounting portion 40E of the first housing 40 is vertically moved between the fitting recess 70 of the frame structure 23 and the mounting portion 60E of the cover 60 (second component which is a constituent element of the present invention). Therefore, the first housing 40, the frame structure 23, and the cover 60 are firmly assembled.
In addition, the screws V penetrated through the mounting holes 60H of the cover 60 pass through the mounting holes 40H of the first housing 40 and are screwed into the female screw holes 73 of the frame structure 23, whereby both mounting portions 23E, Since 60E is firmly fixed with respect to the frame structure 23, compared with the case where the attaching part 40E of the 1st housing 40 is only pinched, assembly | attachment intensity | strength is high.

同じく、カバー６０を枠体２１（枠本体２２）に組み付けた状態では、枠構成体２３（本発明の構成要件である第３の部品）が、枠本体２２（本発明の構成要件である第１の部品）に固着された上に、さらに枠構成体２３の取付部２３Ｅが、枠本体２２の取付部２２Ｅとカバー６０（本発明の構成要件である第２部品）の覆い部６２との間で上下に挟まれた状態となるので、枠本体２２と枠構成体２３とカバー６０が強固に組み付けられる。 Similarly, in the state where the cover 60 is assembled to the frame body 21 (frame body 22), the frame structure body 23 (third component which is a constituent element of the present invention) is the frame body 22 (first constituent element of the present invention). In addition, the attachment portion 23E of the frame structure 23 is further connected to the attachment portion 22E of the frame main body 22 and the cover portion 62 of the cover 60 (second component which is a component of the present invention). The frame body 22, the frame structure 23, and the cover 60 are firmly assembled.

上述のように本実施形態においては、第３の部品は、第１又は第２の部品に対し、第１の部品と第２の部品の組み付け手段とは異なる組み付け手段によって組み付けられた上で、さらに第１と第２の両部品の間に挟まれた状態で支持されるようになっている。したがって、１つの部品が１つの部品のみに支持される形態で組み付けられるものに比べると、部品間の組み付け強度を高めることができる。これにより、部品間のガタ付きや部品間の分離を防止し、部品同士を確実に組み付け状態に保持することができる。 As described above, in the present embodiment, the third component is assembled to the first or second component by an assembly unit different from the assembly unit of the first component and the second component. Further, it is supported while being sandwiched between the first and second parts. Therefore, compared with what is assembled | attached in the form where one component is supported by only one component, the assembly | attachment strength between components can be raised. Thereby, backlash between parts and separation between parts can be prevented, and the parts can be reliably held in the assembled state.

また、第３の部品において第１の部品と第２の部品によって挟まれる部分では、第３の部品が第１の部品又は第２の部品に対してビス止めにより固定されているので、単に第１と第２の両部品の間で挟まれている形態のものに比べると、部品間の組み付け強度が高い。 Further, in the portion of the third component that is sandwiched between the first component and the second component, the third component is fixed to the first component or the second component by screwing, so the first component is simply the second component. Compared to the one sandwiched between the first and second parts, the assembly strength between the parts is high.

実施形態１の斜視図The perspective view of Embodiment 1. 回路構成体の斜視図Perspective view of circuit structure 回路構成体に枠本体を組み付ける前の状態をあらわす斜視図The perspective view showing the state before attaching a frame main part to a circuit composition object 枠本体に枠構成体と第２ハウジングを組み付ける前の状態をあらわす斜視図The perspective view showing the state before a frame structure and a 2nd housing are assembled | attached to a frame main body. 枠構成体に第１ハウジングを組み付ける前の状態をあらわす斜視図The perspective view showing the state before attaching a 1st housing to a frame composition object 枠体にカバーを組み付ける前の状態をあらわす斜視図The perspective view showing the state before attaching a cover to a frame 断面図Cross section 回路構成体の断面図Cross-sectional view of circuit structure 回路構成体に枠本体を組み付ける前の状態をあらわす断面図Sectional view showing the state before the frame body is assembled to the circuit structure 枠本体に枠構成体と第２ハウジングを組み付ける前の状態をあらわす断面図Sectional drawing showing the state before a frame structure and a 2nd housing are assembled | attached to a frame main body. 枠構成体に第１ハウジングを組み付ける前の状態をあらわす断面図Sectional drawing showing the state before attaching a 1st housing to a frame structure 枠体にカバーを組み付ける前の状態をあらわす断面図Sectional view showing the state before the cover is assembled to the frame 断面図Cross section 回路構成体の断面図Cross-sectional view of circuit structure 回路構成体に枠本体を組み付ける前の状態をあらわす断面図Sectional view showing the state before the frame body is assembled to the circuit structure 枠本体に枠構成体と第２ハウジングを組み付ける前の状態をあらわす断面図Sectional drawing showing the state before a frame structure and a 2nd housing are assembled | attached to a frame main body. 枠構成体に第１ハウジングを組み付ける前の状態をあらわす断面図Sectional drawing showing the state before attaching a 1st housing to a frame structure 枠体にカバーを組み付ける前の状態をあらわす断面図Sectional view showing the state before the cover is assembled to the frame

Explanation of symbols

１０…回路構成体
２０…ケース
２１…枠体（第１の部品）
２２…枠本体（第３の部品）
２３…枠構成体（第１の部品、第２の部品、第３の部品）
３０…放熱板（第１の部品）
４０…第１ハウジング（第３の部品）
６０…カバー（第２の部品） DESCRIPTION OF SYMBOLS 10 ... Circuit structure 20 ... Case 21 ... Frame (1st component)
22 ... Frame body (third part)
23... Frame component (first part, second part, third part)
30 ... Heat sink (first part)
40 ... 1st housing (3rd components)
60 ... Cover (second part)

Claims

The circuit structure is housed in a case,
The case is
A first part;
A second part assembled to the first part;
A third component that is assembled to at least one of the first component and the second component by an assembly unit that is different from the assembly unit of the first component and the second component. Has
In a state where the first component and the second component are assembled, the third component is held in a state of being sandwiched between the first component and the second component. An electrical junction box characterized by that.

In the portion of the third component sandwiched between the first component and the second component, the third component is fixed to the first component or the second component by screwing. The electrical junction box according to claim 1.