JP5630103B2 - Electrical junction box - Google Patents

Electrical junction box Download PDF

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JP5630103B2
JP5630103B2 JP2010149429A JP2010149429A JP5630103B2 JP 5630103 B2 JP5630103 B2 JP 5630103B2 JP 2010149429 A JP2010149429 A JP 2010149429A JP 2010149429 A JP2010149429 A JP 2010149429A JP 5630103 B2 JP5630103 B2 JP 5630103B2
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drainage
water
wall
water blocking
inclined surface
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JP2012016154A (en
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中西 竜治
竜治 中西
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Sumitomo Wiring Systems Ltd
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Sumitomo Wiring Systems Ltd
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本発明は、電気接続箱に関する。   The present invention relates to an electrical junction box.

従来より、車両に搭載されて、ランプ、ホーン等の車載電装品の通電、及び断電を実行する電気接続箱として、特許文献1に記載のものが知られている。この電気接続箱は、電子部品が実装された回路基板と、端子金具の並び方向に沿って止水壁が両側に形成され回路基板が装着された枠体とがケース内に収容されて構成されている。   Conventionally, what is described in Patent Document 1 is known as an electrical connection box that is mounted on a vehicle and performs energization and disconnection of in-vehicle electrical components such as a lamp and a horn. This electrical junction box is configured by housing a circuit board on which electronic components are mounted and a frame body in which water blocking walls are formed on both sides along the arrangement direction of the terminal fittings and the circuit board is mounted in the case. ing.

ここで、ケースの上面には、外部のコネクタが嵌合する上側コネクタハウジングと、ヒューズを装着可能なヒューズ装着部とが形成されている。このうち上側コネクタハウジングには、筒状に開口する筒状部の下部がケースの上面よりも下方に陥没形成されており、この底面の挿通孔に枠体の端子金具が挿通されるようになっている。   Here, on the upper surface of the case, an upper connector housing into which an external connector is fitted, and a fuse mounting portion to which a fuse can be mounted are formed. Of these, in the upper connector housing, the lower portion of the cylindrical portion that opens in a cylindrical shape is recessed below the upper surface of the case, and the terminal fittings of the frame body are inserted into the insertion holes in the bottom surface. ing.

このように、底面の挿通孔に端子金具が挿通される構成であるために、挿通孔の隙間からケース内に水が入り込むことも考えられる。この水については、止水壁によって両側を仕切られた枠体の上面部を傾斜面とすることにより、挿通孔から枠体の上面部(傾斜面)に水が到達すると、両側が止水壁により仕切られているため、傾斜面の水は、端部の排水口に導かれて電気接続箱の下方から排出されるようになっている。   Thus, since it is the structure by which a terminal metal fitting is inserted in the insertion hole of a bottom face, it can also be considered that water enters the case from the gap of the insertion hole. About this water, when water reaches the upper surface part (inclined surface) of the frame body from the insertion hole by making the upper surface part of the frame body partitioned on both sides by the water blocking wall into an inclined surface, both sides of the water blocking wall Therefore, the water on the inclined surface is led to the drain outlet at the end and is discharged from below the electric junction box.

特開2009−290941号公報JP 2009-290941 A

しかしながら、挿通孔からケース内に入った水が、上記した傾斜面と排水口からなる排水経路から排水されない場合も考えられる。具体的には、挿通孔から入り込んだ水が、筒状部の陥没した部分の裏面と、枠体の止水壁との間のわずかな隙間を毛細管現象により上昇し、止水壁を超えて回路基板等の領域に浸入することが考えられる。   However, there may be a case where the water that has entered the case through the insertion hole is not drained from the drainage path including the inclined surface and the drainage port. Specifically, the water that has entered through the insertion hole rises by a capillary phenomenon in a slight gap between the back surface of the recessed portion of the cylindrical portion and the water stop wall of the frame, and exceeds the water stop wall. It is conceivable to enter a region such as a circuit board.

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、ケース内に入った水が止水壁を超えて回路基板等の側に浸入することを防止することができる電気接続箱を提供することを目的とする。   The present invention has been completed based on the above situation, and an electrical junction box that can prevent water entering the case from entering the side of the circuit board or the like beyond the water blocking wall. The purpose is to provide.

本発明に係る電気接続箱は、回路基板と、前記回路基板及び端子金具を保持する合成樹脂製の枠体と、下方の開口部から前記回路基板及び前記枠体を収容可能で上面にコネクタと嵌合する角筒状の嵌合部が設けられたケースとを備える電気接続箱であって、前記嵌合部は、前記ケースの上面に対して陥没した筒状陥没部を有するとともに、前記筒状陥没部の底面部には、前記端子金具の一端側が挿通される挿通孔が形成され、前記嵌合部には、前記コネクタのロックアームの先端側を収容するためのロック収容部が凹設され、前記筒状陥没部の外面には、前記ロック収容部により膨出部が形成され、前記枠体には、前記挿通孔に前記端子金具が挿通された状態で前記筒状陥没部の外面に対向する一対の止水壁が設けられ、前記筒状陥没部及び前記止水壁の互いに対向する面のうち、前記止水壁の面には、前記対向する面間に浸入した水を排水経路に導く排水用切欠部が形成されており、前記止水壁には、前記膨出部に対向する位置に凹設された薄肉部が形成され、前記排水用切欠部は、前記止水壁のうち、前記薄肉部を避けて形成されているところに特徴を有する。 An electrical junction box according to the present invention includes a circuit board, a synthetic resin frame that holds the circuit board and the terminal fitting, a connector on the upper surface that can accommodate the circuit board and the frame body from a lower opening. And a case provided with a fitting portion having a rectangular tube shape to be fitted, wherein the fitting portion has a cylindrical depression portion recessed with respect to an upper surface of the case, and the cylinder An insertion hole through which one end side of the terminal fitting is inserted is formed in the bottom surface portion of the recessed portion, and the lock receiving portion for receiving the distal end side of the lock arm of the connector is recessed in the fitting portion. A bulging portion is formed by the lock housing portion on the outer surface of the cylindrical recess portion, and the outer surface of the cylindrical recess portion is inserted into the insertion hole in the frame body. A pair of water blocking walls facing each other, the cylindrical depression and Of opposing surfaces of Kitome waterwall, the surface of the water stop wall, the notch drainage directing water entering the drainage path between the opposing surfaces are formed, the water stop wall Is characterized in that a thin-walled portion is formed at a position facing the bulging portion, and the drainage notch is formed so as to avoid the thin-walled portion of the water blocking wall. .

このようにすれば、毛細管現象により筒状陥没部及び止水壁の互いに対向する面間を水が上昇した場合であっても、この水が排水用切欠部に至ると、筒状陥没部と止水壁との間の隙間が大きくなることで水が上昇しなくなり、排水用切欠部を伝って排水経路に導くことが可能になる。よって、水が止水壁を超えて回路基板等の側に浸入することを防止することができる。
また、筒状陥没部に排水用切欠部を形成するよりも、一般に排水用切欠部の成形が容易になる。
止水壁のうち、薄肉部に排水用切欠部を形成すると止水壁の強度が不足することが考えられるが、本構成によれば、排水用切欠部は、薄肉部を避けて形成されているため、止水壁の強度が不足することを防止できる。
In this way, even if the water rises between the mutually facing surfaces of the cylindrical depression and the water blocking wall due to capillary action, when this water reaches the drainage notch, the cylindrical depression and Since the gap between the water blocking wall and the water stop wall increases, the water does not rise, and can be guided to the drainage path through the drainage notch. Therefore, it is possible to prevent water from entering the circuit board or the like beyond the water blocking wall.
Further, it is generally easier to form the drainage notch than the drainage notch in the cylindrical depression.
Of the water blocking walls, it is considered that the strength of the water blocking wall may be insufficient if the cutout portion for drainage is formed in the thin wall portion, but according to this configuration, the cutout portion for drainage is formed avoiding the thin wall portion. Therefore, it is possible to prevent the strength of the water blocking wall from being insufficient.

なお、以下のような構成としてもよい In addition, it is good also as following structures .

)前記排水経路は、前記一対の止水壁間に設けられた傾斜面と、この傾斜面の終端部に連なり前記枠体を上下に貫通する排水用通し孔とからなり、前記傾斜面の水は前記排水用通し孔を通り前記排水用通し孔の下端から外部に水が排出される。
このようにすれば、効率的に水を外部に排出することができる。
( 1 ) The drainage path is composed of an inclined surface provided between the pair of water blocking walls and a drainage through hole that is connected to a terminal portion of the inclined surface and penetrates the frame body up and down. The water passes through the drainage through hole and is discharged from the lower end of the drainage through hole to the outside.
If it does in this way, water can be efficiently discharged outside.

)前記排水用切欠部は、前記傾斜面に沿う方向に傾斜状に切り欠かれている。
排水用切欠部の切り欠きをいずれの方向に傾斜させたとしても、傾斜面を介して水を排水用通し孔に導くことは可能であるが、本構成によれば、排水用切欠部は、傾斜面に沿う方向に傾斜状に切り欠かれているため、水を直接的に傾斜面を介して排水用通し孔に導くことができる。
( 2 ) The notch for drainage is cut out in an inclined shape in a direction along the inclined surface.
Even if the notch of the drainage notch is inclined in any direction, it is possible to guide water to the drainage through hole through the inclined surface, but according to this configuration, the drainage notch is Since it is cut out in an inclined shape in the direction along the inclined surface, water can be guided directly to the drainage through hole through the inclined surface.

本発明によれば、水が止水壁を超えて回路基板等の側に浸入することを防止することができる。   According to the present invention, it is possible to prevent water from entering the circuit board or the like beyond the water blocking wall.

実施形態1に係る電気接続箱の分解斜視図1 is an exploded perspective view of an electrical junction box according to Embodiment 1. FIG. 電気接続箱を表す背面図Rear view showing electrical junction box 電気接続箱を表す平面図Top view showing the electrical junction box 図2のA−A断面図AA sectional view of FIG. 図2のB−B断面図BB sectional view of FIG. 図2のC−C断面図CC sectional view of FIG. 図2のD−D断面図DD sectional view of FIG. 毛細管現象により上昇した水が排水用切欠部により排水経路に導かれる状態を説明する図The figure explaining the state where the water which rose by capillary phenomenon is led to the drainage channel by the notch for drainage ケースを表す底面図Bottom view showing the case 枠体の平面図Top view of the frame 図10のE−E断面図EE sectional view of FIG. 図10のF−F断面図FF sectional view of FIG.

<実施形態1>
本発明の実施形態1を図面を参照しつつ説明する。
電気接続箱10は、車両における図示しない電源と、ランプ、ホーン等の車載電装品(図示しない)との間に配されて、車載電装品の通電、及び断電を実行するものである。以下では、上下方向及び左右方向については図2を基準とし、図2の紙面奥方を前方、紙面手前側を後方として説明する。なお、電気接続箱10は、車両に対して、図2の上下方向の姿勢で装着されるものである。
<Embodiment 1>
Embodiment 1 of the present invention will be described with reference to the drawings.
The electrical junction box 10 is arranged between a power source (not shown) in the vehicle and on-vehicle electrical components (not shown) such as a lamp and a horn, and performs energization and disconnection of the on-vehicle electrical components. In the following, the vertical direction and the horizontal direction will be described with reference to FIG. 2, with the back side of the paper in FIG. The electrical connection box 10 is attached to the vehicle in the vertical orientation of FIG.

電気接続箱10は、図1に示すように、ケース20と、回路基板(図示しない)と共にケース20に収容される枠体40とを備えている。
回路基板は、プリント配線技術により図示しない導電路を形成した長方形型のプリント基板上に、マイコンや半導体リレー等の電子部品12を実装したものである。この回路基板は、枠体40の裏面側に重ねられており、ビスにより枠体40のビス孔58(図12参照)にビス留めされる。
As shown in FIG. 1, the electrical junction box 10 includes a case 20 and a frame body 40 accommodated in the case 20 together with a circuit board (not shown).
The circuit board is obtained by mounting electronic components 12 such as a microcomputer and a semiconductor relay on a rectangular printed board in which a conductive path (not shown) is formed by a printed wiring technique. This circuit board is overlaid on the back side of the frame 40 and is screwed into a screw hole 58 (see FIG. 12) of the frame 40 by screws.

ケース20は、合成樹脂製であって、図1に示すように、広い面積の平面部20Bが前後に対向配置されてなる扁平な角筒状をなしており、上端部が閉塞された上面部20Aとされ、下端部に枠体40を挿通可能な開口部21が形成されている。
ケース20の上面部20Aには、図示しない角形のコネクタが嵌合装着される嵌合部22と、複数のヒューズが装着されるヒューズ装着部32とを備えており、これらが左右に並んで配置されている。
The case 20 is made of synthetic resin, and as shown in FIG. 1, has a flat rectangular tube shape in which a flat area 20 </ b> B having a large area is disposed opposite to the front and back, and an upper surface portion whose upper end is closed. 20A, and an opening 21 through which the frame body 40 can be inserted is formed at the lower end.
The upper surface portion 20A of the case 20 includes a fitting portion 22 to which a rectangular connector (not shown) is fitted and mounted, and a fuse mounting portion 32 to which a plurality of fuses are mounted, and these are arranged side by side. Has been.

嵌合部22は、コネクタが嵌合可能な角筒状をなしており、ケース20の上面部20Aから上方に角筒状に突出する筒状突出部24と、ケース20の上面部20Aから下方に角筒状に陥没した筒状陥没部25とからなり(図4参照)、嵌合部22の内面には、コネクタのロックアームの先端側を収容するためのロック収容部23が筒状突出部24と筒状陥没部25とに亘って凹設されている。
筒状陥没部25は、ケース20を底面側から表した図9に示すように、角筒形の囲み壁26と、この囲み壁26の下端部に設けられる平坦な底面部29とからなり、底面部29には、複数の端子金具41Aの一端側を一括して挿通する長方形状の挿通孔30が形成されている。この挿通孔30には、ロック収容部23に対応して凹部が形成されている。
The fitting portion 22 has a rectangular tube shape into which the connector can be fitted. The cylindrical protruding portion 24 protrudes upward from the upper surface portion 20A of the case 20 into a rectangular tube shape, and the lower portion from the upper surface portion 20A of the case 20. A lock recess 23 for receiving the distal end side of the lock arm of the connector protrudes on the inner surface of the fitting portion 22 on the inner surface of the fitting portion 22 (see FIG. 4). A recess is provided across the portion 24 and the cylindrical depression 25.
As shown in FIG. 9 showing the case 20 from the bottom surface side, the cylindrical depression 25 includes a rectangular cylindrical wall 26 and a flat bottom surface 29 provided at the lower end of the wall 26. The bottom surface portion 29 is formed with a rectangular insertion hole 30 through which one end sides of the plurality of terminal fittings 41A are collectively inserted. A recess is formed in the insertion hole 30 corresponding to the lock housing portion 23.

囲み壁26は、図4に示すように、左右方向に延出され互いに対向する一対の対向壁27A,27Bと、前後方向に延出され、対向壁27A,27B間を連ねる一対の側壁部28,28とが環状に連なって形成されている。
対向壁27A,27Bは、互いに平行に、かつ、ほぼ平坦に左右に延びている。
後方の対向壁27Bの外面側であって、内面側にロック収容部23を有する部分の外面側には、この外面からわずかに突出する膨出部31が形成されている。
As shown in FIG. 4, the surrounding wall 26 extends in the left-right direction and faces a pair of facing walls 27A and 27B, and extends in the front-rear direction and connects a pair of side walls 28A and 27B. , 28 are connected in a ring shape.
The opposing walls 27A and 27B extend to the left and right substantially parallel to each other and substantially flat.
A bulging portion 31 that slightly protrudes from the outer surface is formed on the outer surface side of the rear facing wall 27B and on the outer surface side of the portion having the lock housing portion 23 on the inner surface side.

ヒューズ装着部32内の底面部には、ヒューズを装着するための装着孔33が多数形成されている。
ケース20の後面部には、上下方向に延びる4本(複数本)のV字状の補強リブ35が左右に並んで配置されている。
なお、ケース20の左右方向の両端部には、上面部20Aから下方に突出する係止爪部34が設けられており、枠体40がケース20内に収容された際に枠体40の左右方向の両端部に立設された被係止爪部57(図12参照)の内面側に係止爪部34が係止される。
A large number of mounting holes 33 for mounting fuses are formed in the bottom surface of the fuse mounting portion 32.
Four (a plurality) V-shaped reinforcing ribs 35 extending in the vertical direction are arranged side by side on the rear surface of the case 20.
Note that locking claw portions 34 projecting downward from the upper surface portion 20 </ b> A are provided at both left and right ends of the case 20, and when the frame body 40 is accommodated in the case 20, The locking claw portion 34 is locked to the inner surface side of the locked claw portion 57 (see FIG. 12) erected at both ends in the direction.

枠体40は、図1に示すように、多数の端子金具41と、多数の端子金具41を保持する合成樹脂製の樹脂成形部42とからなる。
端子金具41は、L字形の端子金具であって、樹脂成形部42の上部及び下部にそれぞれ並んで配置されており、このうち、上部の端子金具41は、ケース20の嵌合部22内に突出する端子金具41Aと、ヒューズ装着部32内に配される端子金具41Bとからなる。
As shown in FIG. 1, the frame body 40 includes a large number of terminal fittings 41 and a synthetic resin resin molded portion 42 that holds the numerous terminal fittings 41.
The terminal fittings 41 are L-shaped terminal fittings, which are arranged side by side on the upper and lower portions of the resin molding portion 42, and among these, the upper terminal fitting 41 is in the fitting portion 22 of the case 20. The terminal fitting 41 </ b> A protrudes and the terminal fitting 41 </ b> B arranged in the fuse mounting portion 32.

樹脂成形部42は、上部にて端子金具41A,41Bを保持するとともに回路基板側への水の浸入を防ぐ浸入防止部43と、下部にて相手側コネクタ(図示しない)と嵌合し複数の端子金具41を有するコネクタ部50と、上下方向の中間部に設けられ浸入防止部43とコネクタ部50との間を連結する連結部52とを備えている。
浸入防止部43は、図10に示すように、枠体40の上面に浸入した水を左右の排水用通し孔56に導く傾斜面部44(傾斜面)と、並んで配置された端子金具41A,41Bを挟むように所定間隔を空けて対向配置された一対の止水壁45A,45Bとを備えている。
The resin molding part 42 is fitted with an intrusion prevention part 43 that holds the terminal fittings 41A, 41B at the upper part and prevents water from entering the circuit board side, and a mating connector (not shown) at the lower part. The connector part 50 which has the terminal metal fitting 41, and the connection part 52 which connects between the intrusion prevention part 43 and the connector part 50 provided in the intermediate part of the up-down direction are provided.
As shown in FIG. 10, the intrusion prevention unit 43 includes an inclined surface portion 44 (inclined surface) that guides water that has entered the upper surface of the frame body 40 to the left and right drainage through holes 56, and terminal fittings 41 </ b> A arranged side by side. A pair of water blocking walls 45A and 45B arranged to face each other with a predetermined interval so as to sandwich 41B.

傾斜面部44は、図11に示すように、左右方向の中間部が最も高く、その中間部から左右の端部に設けられた排水用通し孔56に向けてゆるやかに傾斜する山形状をなし、この傾斜面部44の傾斜が低くなる方向の終端部が枠体40を上下に貫通する排水用通し孔56の上端部に連なっている。なお、図10に示すように、この傾斜面部44から上方に突出する端子金具41A,41Bの基端部の周りは、傾斜面部44がやや盛り上がっている。
そして、傾斜面部44の下方に貫通した端子金具41A,41Bの他方の端部は、下方において後方側に直角に屈曲されて、裏面側に配された回路基板のスルーホールに挿通されて回路基板の導電路に接続される。
As shown in FIG. 11, the inclined surface portion 44 has the highest middle portion in the left-right direction, and has a mountain shape that gently slopes from the middle portion toward the drainage through holes 56 provided at the left and right end portions, The end portion of the inclined surface portion 44 in the direction in which the inclination is lowered is continued to the upper end portion of the drainage through hole 56 that vertically penetrates the frame body 40. As shown in FIG. 10, the inclined surface portion 44 is slightly raised around the base end portions of the terminal fittings 41 </ b> A and 41 </ b> B protruding upward from the inclined surface portion 44.
The other ends of the terminal fittings 41A and 41B penetrating below the inclined surface portion 44 are bent at a right angle to the rear side at the lower side and inserted into the through holes of the circuit board disposed on the back surface side. Connected to the conductive path.

止水壁45A,45Bは、傾斜面部44の前後の端部(前後の縁部)から立ち上げられており、枠体40がケース20に収容された際には、外面側がケース20の平面部20Bの内面に対して当接状態となり、内面側が筒状陥没部25の外面に対して当接状態となる。
止水壁45A,45Bのうち、枠体40のケース20への収容時に筒状陥没部25と対向する部分(図10の右側寄りの部分)には、止水壁45A,45Bの一部を薄肉に切欠いて形成した排水用切欠部46,47が形成されている。
このうち、止水壁45Aに形成された排水用切欠部46は、図11に示すように、止水壁45Aの上下方向のほぼ中間部から上方側を所定の厚みで切欠いて形成され、排水用切欠部46の下端の段差部46Aは、傾斜面部44の傾斜とほぼ平行に(傾斜に沿って)形成されている。
The water blocking walls 45 </ b> A and 45 </ b> B are raised from the front and rear end portions (front and rear edge portions) of the inclined surface portion 44, and when the frame body 40 is accommodated in the case 20, the outer surface side is the flat portion of the case 20. 20B is brought into contact with the inner surface, and the inner surface is brought into contact with the outer surface of the cylindrical depression 25.
Of the water blocking walls 45A and 45B, a part of the water blocking walls 45A and 45B is disposed on a portion (a portion on the right side in FIG. 10) facing the cylindrical depression 25 when the frame body 40 is accommodated in the case 20. The drainage cutout portions 46 and 47 are formed by being cut into thin walls.
Among these, as shown in FIG. 11, the notch 46 for drainage formed in the water stop wall 45A is formed by notching the upper side from the substantially middle part of the water stop wall 45A with a predetermined thickness. The stepped portion 46A at the lower end of the cutout portion 46 is formed substantially parallel to (in line with) the inclination of the inclined surface portion 44.

他方の止水壁45Bに形成された排水用切欠部47は、図12に示すように、止水壁45Bの上下方向のほぼ中間部から上方側を所定の厚みで切欠いて形成されているが、筒状陥没部25の膨出部31を挿通できるようにこの止水壁45Bを薄肉に形成した薄肉部48が膨出部31と対応する位置に形成されているため、この薄肉部48の部分は、排水用切欠部47が分断されている。
排水用切欠部47の下端の段差部47Aは、傾斜面部44の傾斜にほぼ平行に(傾斜に沿って)形成されている。
なお、止水壁45Bの外面側には、図10に示すように、枠体40がケース20に収容されて止水壁45Bが平面部20Bを受けた際にケース20の補強リブ35を挿通可能な挿通凹部49が補強リブ35の位置に対応して形成されている。
As shown in FIG. 12, the drainage cutout portion 47 formed in the other water stop wall 45B is formed by cutting out the upper side from a substantially middle portion in the vertical direction of the water stop wall 45B with a predetermined thickness. Since the thin wall portion 48 formed by thinly forming the water blocking wall 45B so as to be inserted through the bulging portion 31 of the cylindrical depression 25 is formed at a position corresponding to the bulging portion 31, In the portion, the drainage cutout 47 is divided.
A stepped portion 47A at the lower end of the drainage notch 47 is formed substantially parallel to the inclination of the inclined surface portion 44 (along the inclination).
As shown in FIG. 10, the reinforcing rib 35 of the case 20 is inserted into the outer surface side of the water blocking wall 45B when the frame body 40 is accommodated in the case 20 and the water blocking wall 45B receives the flat surface portion 20B. Possible insertion recesses 49 are formed corresponding to the positions of the reinforcing ribs 35.

コネクタ部50は、相手側コネクタ(図示しない)と嵌合可能になっており、端子金具41の一端側(下端側)がコネクタフード内に突出し、コネクタ部50を貫通した端子金具41の他方の端部は、上方にて回路基板側に直角に屈曲されて回路基板のスルーホールに挿通されて回路基板の導電路に接続される。
連結部52は、図11に示すように、浸入防止部43とコネクタ部50との間を4箇所で分けて連ねる部分であり、枠体40の左右の端部に設けられる2箇所の梁部と、これよりも内側に設けられる2箇所の梁部とからなり、これら梁部の間に枠体40の表裏を貫通する部品挿通孔55が形成されている。この部品挿通孔55は、回路基板の装着時には、回路基板に実装された電子部品12が挿通される(図1参照)。
The connector portion 50 can be fitted with a mating connector (not shown), and one end side (lower end side) of the terminal fitting 41 protrudes into the connector hood, and the other end of the terminal fitting 41 penetrating the connector portion 50. The end portion is bent upward at a right angle to the circuit board side and is inserted into the through hole of the circuit board to be connected to the conductive path of the circuit board.
As shown in FIG. 11, the connecting portion 52 is a portion where the intrusion preventing portion 43 and the connector portion 50 are divided and connected at four locations, and two beam portions provided at the left and right end portions of the frame body 40. And two beam portions provided on the inner side, and a part insertion hole 55 penetrating the front and back of the frame body 40 is formed between the beam portions. The component insertion hole 55 allows the electronic component 12 mounted on the circuit board to be inserted when the circuit board is mounted (see FIG. 1).

枠体40の左右の端部には、図11に示すように、上下に貫通する排水用通し孔56が形成されている。
排水用通し孔56は、傾斜面部44の端部(縁部)から下方に延出され枠体40の下端の開口部56Aに連なる。具体的には、傾斜面部44の端部から連結部52の内部及びコネクタ部50の側方を通って下方と連通する。
As shown in FIG. 11, drainage through holes 56 penetrating vertically are formed at the left and right ends of the frame body 40.
The drainage through hole 56 extends downward from the end (edge) of the inclined surface portion 44 and continues to the opening 56 </ b> A at the lower end of the frame body 40. Specifically, the end portion of the inclined surface portion 44 communicates with the lower portion through the inside of the connecting portion 52 and the side of the connector portion 50.

次に、ケース20に浸入した水の排出について具体的に説明する。
何らかの要因により嵌合部22の内部に水が浸入し、筒状陥没部25の底面部29に設けられた挿通孔30を通ってケース20の内部に水が浸入する場合がある。
この場合、浸入した水は、通常は、図11からも明らかなように、挿通孔30の下方において排水経路を構成する傾斜面部44に落下する。傾斜面部44に落下した水は、傾斜面部44が低くなる端部(縁部)側に導かれ、排水用通し孔56に至るとこの排水用通し孔56を通って枠体40の下端部の排出口56Aから排出される。
Next, the discharge of water that has entered the case 20 will be specifically described.
For some reason, water may enter the fitting portion 22, and water may enter the case 20 through the insertion hole 30 provided in the bottom surface portion 29 of the cylindrical depression 25.
In this case, the water that has entered normally falls to the inclined surface portion 44 that constitutes the drainage path below the insertion hole 30, as is apparent from FIG. The water dropped on the inclined surface portion 44 is guided to the end (edge) side where the inclined surface portion 44 is lowered, and reaches the drainage through hole 56, passes through the drainage through hole 56, and reaches the lower end portion of the frame body 40. It is discharged from the discharge port 56A.

しかしながら、挿通孔30を通って浸入した水は、上記したように傾斜面部44及び排水用通し孔56から下方に排出されない場合も考えられる。
具体的には、嵌合部22に浸入した水が、挿通孔30を通り底面部29の裏面側を伝って囲み壁26(対向壁27A,27B)の下端部に至る。ここでは、囲み壁26(対向壁27A,27B)の外面と止水壁45A,45Bの内面とが微小な隙間を有したほぼ当接状態で対向配置されている(図6,7参照)。
However, the water that has entered through the insertion hole 30 may not be discharged downward from the inclined surface portion 44 and the drainage through hole 56 as described above.
Specifically, the water that has entered the fitting portion 22 passes through the insertion hole 30, travels along the back surface side of the bottom surface portion 29, and reaches the lower end portion of the surrounding wall 26 (opposing walls 27 </ b> A and 27 </ b> B). Here, the outer surface of the surrounding wall 26 (opposing walls 27A and 27B) and the inner surface of the water blocking walls 45A and 45B are opposed to each other in a substantially abutting state with a minute gap (see FIGS. 6 and 7).

このような囲み壁26(対向壁27A,27B)と止水壁45A,45Bとが当接状態又はわずかな隙間を有した状態となった部分の下端部に到達した水は、毛細管現象によりこの隙間を上昇し、止水壁45A,45Bを超えた回路基板や電子部品12を有する側に浸入することが考えられる。   The water that has reached the lower end of the part where the surrounding wall 26 (opposing walls 27A and 27B) and the water blocking walls 45A and 45B are in contact with each other or have a slight gap is caused by capillary action. It is conceivable that the gap is raised and enters the side having the circuit board and the electronic component 12 beyond the water blocking walls 45A and 45B.

しかしながら、本実施形態では、止水壁45A,45Bには、排水用切欠部46,47が形成されており、図8に示すように、毛細管現象により対向壁27A(27B)と止水壁45A(45B)との間を水が上昇した場合であっても(上向き点線矢印(i))、排水用切欠部46(47)を有する部分については、対向壁27A(27B)と止水壁45A(45B)との間の隙間が大きくなり(図4,5参照)、水は毛細管現象で上昇することができない。   However, in this embodiment, the water blocking walls 45A and 45B are provided with drainage cutout portions 46 and 47, and as shown in FIG. 8, the opposing wall 27A (27B) and the water blocking wall 45A are caused by capillary action. Even when water rises between (45B) (upward dotted arrow (i)), for the portion having the drainage cutout 46 (47), the opposing wall 27A (27B) and the water blocking wall 45A (45B) increases (see FIGS. 4 and 5), and water cannot rise due to capillary action.

そのため、排水用切欠部46(47)に至った水は、図8に示すように、段差部46A(47A)を伝って低い方の端部側に移動する(右向き点線矢印(ii))。ここで、排水用切欠部46(47)は筒状陥没部25に対応して形成されているため、排水用切欠部46(47)の端部においては、筒状陥没部25(囲み壁26)が当接しておらず、排水用切欠部46(47)の端部に至った水は、ここから止水壁45A(45B)を伝って下降し、傾斜面部44に至る(下向き点線矢印(iii))。この傾斜面部44に至ると、通常と同様に、傾斜面部44が低くなる端部側に導かれ(右向き点線矢印(iv))、排水用通し孔56に至るとこの排水用通し孔56を通って枠体40の下端部の排出口56Aから排出される。   Therefore, as shown in FIG. 8, the water that has reached the drainage cutout 46 (47) travels along the step 46A (47A) to the lower end (right-pointed dotted arrow (ii)). Here, since the drainage notch 46 (47) is formed corresponding to the cylindrical recess 25, the cylindrical recess 25 (the surrounding wall 26) is formed at the end of the drainage notch 46 (47). ) Are not in contact with each other, and the water reaching the end of the drainage cutout 46 (47) descends from the waterstop wall 45A (45B) to the inclined surface 44 (downward dotted arrow ( iii)). When the inclined surface portion 44 is reached, the inclined surface portion 44 is led to the lower end side (right-pointing dotted line arrow (iv)) as usual, and when the drainage through hole 56 is reached, the drainage through hole 56 is passed through. Is discharged from the discharge port 56A at the lower end of the frame body 40.

本実施形態によれば、以下の効果を奏する。
(1)毛細管現象により筒状陥没部25及び止水壁45A,45Bの互いに対向する面間を水が上昇した場合であっても、この水が排水用切欠部46,47に至ると、筒状陥没部25と止水壁45A,45Bとの間の隙間が大きくなることで水が上昇しなくなり、排水用切欠部46,47を伝って排水経路(傾斜面部44及び排水用通し孔56)に導くことが可能になる。よって、水が止水壁45A,45Bを超えて回路基板等の側に浸入することを防止することができる。
According to this embodiment, the following effects can be obtained.
(1) Even when the water rises between the mutually facing surfaces of the cylindrical depression 25 and the water blocking walls 45A and 45B due to the capillary phenomenon, if the water reaches the drainage notches 46 and 47, the cylinder The gap between the recessed portion 25 and the water blocking walls 45A and 45B is increased so that the water does not rise, and the drainage path (the inclined surface portion 44 and the drainage through hole 56) passes through the drainage notches 46 and 47. It becomes possible to lead to. Therefore, it is possible to prevent water from entering the circuit board or the like beyond the water blocking walls 45A and 45B.

(2)排水用切欠部46,47は、止水壁45A,45Bに形成されているため、筒状陥没部25に排水用切欠部46,47を形成するよりも、一般に排水用切欠部46,47の成形が容易になる。
(3)止水壁45A,45Bのうち、ロック収容部23及び膨出部31により形成される薄肉部48に排水用切欠部46,47を形成すると止水壁45A,45Bの強度が不足することが考えられるが、本実施形態によれば、排水用切欠部46,47は、薄肉部48を避けて形成されているため、止水壁45A,45Bの強度が不足することを防止できる。
(2) Since the drainage cutout portions 46 and 47 are formed in the water blocking walls 45A and 45B, the drainage cutout portion 46 is generally formed rather than the drainage cutout portions 46 and 47 formed in the cylindrical depression 25. 47 can be easily formed.
(3) Of the water blocking walls 45A and 45B, when the drainage cutout portions 46 and 47 are formed in the thin wall portion 48 formed by the lock housing portion 23 and the bulging portion 31, the strength of the water blocking walls 45A and 45B is insufficient. However, according to the present embodiment, since the drainage notches 46 and 47 are formed so as to avoid the thin portion 48, it is possible to prevent the strength of the water blocking walls 45A and 45B from being insufficient.

(4)排水経路は、一対の止水壁45A,45B間に設けられた傾斜面部44と、この傾斜面部44の終端部に連なり枠体40を上下に貫通する排水用通し孔56とからなり、傾斜面部44の水は排水用通し孔56を通って排水用通し孔56の下端から外部に水が排出されるため、効率的に水を外部に排出することができる。
(5)排水用切欠部46,47の切り欠きをいずれの方向に傾斜させたとしても、傾斜面部44を介して水を排水用通し孔56に導くことは可能であるが、本実施形態によれば、排水用切欠部46,47は、傾斜面部44に沿う方向に傾斜状に切り欠かれているため、水を直接的に傾斜面部44を介して排水用通し孔56に導くことができる。
(4) The drainage path includes an inclined surface portion 44 provided between the pair of water blocking walls 45A and 45B, and a drainage through hole 56 that extends to the end portion of the inclined surface portion 44 and penetrates the frame body 40 vertically. Since the water in the inclined surface portion 44 passes through the drainage through hole 56 and is discharged from the lower end of the drainage through hole 56 to the outside, the water can be efficiently discharged to the outside.
(5) Even if the notches of the drainage cutout portions 46 and 47 are inclined in any direction, it is possible to guide water to the drainage through hole 56 through the inclined surface portion 44. According to the above, since the drainage notches 46 and 47 are notched so as to be inclined in the direction along the inclined surface portion 44, water can be directly guided to the drainage through hole 56 via the inclined surface portion 44. .

<他の実施形態>
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれる。
(1)上記実施形態では、排水用切欠部46,47は、止水壁45A,45Bに設けられていたが、参考例として、筒状陥没部25に設けてもよい。具体的には、筒状陥没部25のうち、止水壁45A,45Bと対向する外周面(囲み壁26の外周面)の部分について排水用切欠部を、例えば、所定の高さから上方に切欠き形成するようにしてもよい。
<Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the above embodiment, the drainage notches 46 and 47 are provided in the water blocking walls 45A and 45B, but may be provided in the cylindrical depression 25 as a reference example . Specifically, the drainage notch portion is, for example, upward from a predetermined height with respect to the outer peripheral surface (the outer peripheral surface of the surrounding wall 26) facing the water blocking walls 45A and 45B in the cylindrical depression 25. A notch may be formed.

(2)排水用切欠部46,47の段差部46A,47Aを傾斜面部44と平行になるように形成したが、これに限られない。例えば、排水用切欠部の段差部を傾斜面部44の傾斜とは反対側に傾斜するように形成してもよい。このようにしても、排水用切欠部の段差部の末端から止水壁45A,45Bを伝って傾斜面部44に至り、傾斜面部44に至った水は傾斜面部44の傾斜により、排水用通し孔56に導かれる。   (2) The step portions 46A and 47A of the drainage cutout portions 46 and 47 are formed so as to be parallel to the inclined surface portion 44. However, the present invention is not limited to this. For example, the stepped portion of the drainage notch may be formed so as to be inclined to the opposite side of the inclined surface 44. Even in this case, the water reaching the inclined surface portion 44 passes through the water blocking walls 45A and 45B from the end of the stepped portion of the drainage notch, and the water reaching the inclined surface portion 44 is drained through-holes due to the inclination of the inclined surface portion 44 56.

(3)筒状陥没部25の底面部29に形成される挿通孔30は、複数の端子金具41Aを一括して挿通するものであったが、底面部に端子金具41Aの数に応じた挿通孔を設け、各挿通孔に各端子金具41Aを挿通させるようにしてもよい。   (3) The insertion hole 30 formed in the bottom surface portion 29 of the cylindrical depression 25 is for inserting the plurality of terminal fittings 41A all together, but the bottom portion is inserted according to the number of the terminal fittings 41A. A hole may be provided, and each terminal fitting 41A may be inserted into each insertion hole.

(4)排水用切欠部46,47は、止水壁45A,45Bの高さのほぼ中間位置に設けたが、これ以外の高さ位置に設けるようにしてもよい。   (4) Although the drainage cutouts 46 and 47 are provided at substantially the middle position of the water blocking walls 45A and 45B, they may be provided at other height positions.

10…電気接続箱
12…電子部品
20…ケース
20A…上面部
20B…平面部
22…嵌合部
24…筒状突出部
25…筒状陥没部
26…囲み壁
27A,27B…対向壁
28…側壁部
29…底面部
30…挿通孔
31…膨出部
40…枠体
41(41A,41B)…端子金具
42…樹脂成形部
43…浸入防止部
44…傾斜面部(傾斜面。排水経路)
45A,45B…止水壁
46,47…排水用切欠部
46A,47A…段差部
48…薄肉部
56…排水用通し孔(排水経路)
56A…排出口
DESCRIPTION OF SYMBOLS 10 ... Electrical junction box 12 ... Electronic component 20 ... Case 20A ... Upper surface part 20B ... Plane part 22 ... Fitting part 24 ... Cylindrical protrusion 25 ... Cylindrical depression part 26 ... Enclosure wall 27A, 27B ... Opposite wall 28 ... Side wall Part 29 ... Bottom part 30 ... Insertion hole 31 ... Swelling part 40 ... Frame body 41 (41A, 41B) ... Terminal metal fitting 42 ... Resin molding part 43 ... Intrusion prevention part 44 ... Inclined surface part (inclined surface; drainage path)
45A, 45B ... Water blocking walls 46, 47 ... Drainage cutout portions 46A, 47A ... Stepped portion 48 ... Thin wall portion 56 ... Drainage through hole (drainage path)
56A ... Discharge port

Claims (3)

回路基板と、前記回路基板及び端子金具を保持する合成樹脂製の枠体と、下方の開口部から前記回路基板及び前記枠体を収容可能で上面にコネクタと嵌合する角筒状の嵌合部が設けられたケースとを備える電気接続箱であって、
前記嵌合部は、前記ケースの上面に対して陥没した筒状陥没部を有するとともに、前記筒状陥没部の底面部には、前記端子金具の一端側が挿通される挿通孔が形成され、
前記嵌合部には、前記コネクタのロックアームの先端側を収容するためのロック収容部が凹設され、前記筒状陥没部の外面には、前記ロック収容部により膨出部が形成され、
前記枠体には、前記挿通孔に前記端子金具が挿通された状態で前記筒状陥没部の外面に対向する一対の止水壁が設けられ、
前記筒状陥没部及び前記止水壁の互いに対向する面のうち、前記止水壁の面には、前記対向する面間に浸入した水を排水経路に導く排水用切欠部が形成されており、
前記止水壁には、前記膨出部に対向する位置に凹設された薄肉部が形成され、前記排水用切欠部は、前記止水壁のうち、前記薄肉部を避けて形成されていることを特徴とする電気接続箱。
A circuit board, a synthetic resin frame that holds the circuit board and terminal fittings, and a rectangular tube fitting that can accommodate the circuit board and the frame body from the lower opening and that fits with a connector on the upper surface An electrical junction box comprising a case provided with a portion,
The fitting portion has a cylindrical recessed portion that is recessed with respect to the upper surface of the case, and an insertion hole through which one end side of the terminal fitting is inserted is formed in the bottom surface portion of the cylindrical recessed portion,
In the fitting portion, a lock accommodating portion for accommodating the distal end side of the lock arm of the connector is recessed, and a bulge portion is formed by the lock accommodating portion on the outer surface of the cylindrical depression,
The frame body is provided with a pair of water blocking walls facing the outer surface of the cylindrical depression in a state where the terminal fitting is inserted through the insertion hole,
Of facing surfaces of the cylindrical recess and the waterproofing wall, the surface of the water stop wall is cut-out portion for drainage formed to guide the water entering between the surface facing the drainage path ,
The water blocking wall is formed with a thin portion recessed at a position facing the bulging portion, and the drainage notch is formed so as to avoid the thin wall portion of the water blocking wall. An electrical junction box characterized by that.
前記排水経路は、前記一対の止水壁間に設けられた傾斜面と、この傾斜面の終端部に連なり前記枠体を上下に貫通する排水用通し孔とからなり、前記傾斜面の水は前記排水用通し孔を通り前記排水用通し孔の下端から外部に水が排出されることを特徴とする請求項1記載の電気接続箱。 The drainage path is composed of an inclined surface provided between the pair of water blocking walls and a drainage through-hole that is connected to a terminal portion of the inclined surface and penetrates the frame body up and down. 2. The electrical junction box according to claim 1 , wherein water is discharged to the outside from the lower end of the drainage through hole through the drainage through hole . 前記排水用切欠部は、前記傾斜面に沿う方向に傾斜状に切り欠かれていることを特徴とする請求項2記載の電気接続箱。 The electrical junction box according to claim 2, wherein the drainage cutout portion is cut out in an inclined shape in a direction along the inclined surface .
JP2010149429A 2010-06-30 2010-06-30 Electrical junction box Expired - Fee Related JP5630103B2 (en)

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