JP4588690B2 - Drip-proof structure of electronic control unit - Google Patents

Drip-proof structure of electronic control unit Download PDF

Info

Publication number
JP4588690B2
JP4588690B2 JP2006314104A JP2006314104A JP4588690B2 JP 4588690 B2 JP4588690 B2 JP 4588690B2 JP 2006314104 A JP2006314104 A JP 2006314104A JP 2006314104 A JP2006314104 A JP 2006314104A JP 4588690 B2 JP4588690 B2 JP 4588690B2
Authority
JP
Japan
Prior art keywords
eaves
control unit
electronic control
edge
connector
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2006314104A
Other languages
Japanese (ja)
Other versions
JP2008130359A (en
Inventor
明裕 岩崎
隆洋 石川
裕章 小池
智英 関
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP2006314104A priority Critical patent/JP4588690B2/en
Publication of JP2008130359A publication Critical patent/JP2008130359A/en
Application granted granted Critical
Publication of JP4588690B2 publication Critical patent/JP4588690B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Casings For Electric Apparatus (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Description

この発明は、電子制御ユニットの防滴構造に関するものであり、特に電子制御ユニットのコネクタ周辺の防滴構造に関する。   The present invention relates to a drip-proof structure for an electronic control unit, and more particularly to a drip-proof structure around a connector of an electronic control unit.

従来から、結露などで生じた水滴が電子制御ユニット上に落ちた場合に、この水滴が筐体やコネクタの隙間から浸入して内部回路がショートしないように、例えば筐体の隙間やコネクタなどの上方に防滴用のひさしを設けたものがある（例えば、特許文献１参照）。
特開平１−１７２０４５号公報 Conventionally, when water droplets generated due to condensation have fallen on the electronic control unit, the water droplets will not enter the gap between the housing and the connector and the internal circuit will not be short-circuited. Some have a drip-proof eaves above (see, for example, Patent Document 1).
Japanese Unexamined Patent Publication No. 1-172045

しかしながら、上述の電子制御ユニットの防滴構造は、水平方向にひさしが延びている部分があるため、このひさしに沿って移動する水滴がひさしの下面に回り込んでひさしの基部側に至り、電子制御ユニットのコネクタや筐体の隙間などに浸入する虞がある。   However, since the above-mentioned drip-proof structure of the electronic control unit has a portion where the eaves extend in the horizontal direction, a water droplet moving along this eaves goes around the lower side of the eaves and reaches the base side of the eaves. There is a risk of entering a connector of the control unit or a gap in the housing.

また、ひさしの基部側に水滴が移動するのを防止するために、例えばひさしをその基部側が高くなるように傾斜させて設けた場合、コネクタを抜き差しするための空間にひさしの縁部分が張り出してしまうためコネクタ接続時の作業性が悪化してしまう。   In addition, in order to prevent water droplets from moving to the base side of the eaves, for example, when the eaves are inclined so that the base side becomes higher, the edge portion of the eaves protrudes into the space for inserting and removing the connector. Therefore, workability at the time of connector connection will deteriorate.

そこで、この発明は、コネクタ接続時の作業性が悪化することなく水滴の浸入を防止することができる電子制御ユニットの防滴構造を提供するものである。   Therefore, the present invention provides a drip-proof structure for an electronic control unit that can prevent the ingress of water droplets without deteriorating the workability at the time of connector connection.

上記の課題を解決するために、請求項１に記載した発明は、コネクタ（例えば、実施の形態におけるコネクタ接続端子６）の上方を覆うひさし（例えば、実施の形態におけるひさし１２）を備えた電子制御ユニット（例えば、実施の形態における電子制御ユニット１）の防滴構造において、前記ひさしの縁部(例えば、実施の形態における縁部１４)に沿って下方に突出する突条（例えば、実施の形態における突条１５）を設け、該突条の外側に面取り部（例えば、実施の形態における面取り部１６）を設け、前記電子制御ユニットの側壁（例えば、実施の形態における側壁３）には、該側壁の縁部（例えば、実施の形態における前縁３２）の外側に面取り部（例えば、実施の形態における面取り部３５）を設け、前記突条の面取り部と前記側壁の面取り部とを連続して形成したことを特徴とする。 In order to solve the above-mentioned problem, the invention described in claim 1 is an electronic device including an eaves (e.g., eaves 12 in the embodiment) covering an upper portion of a connector (e.g., the connector connection terminal 6 in the embodiment). In the drip-proof structure of the control unit (for example, the electronic control unit 1 in the embodiment), the ridge (for example, the embodiment) protruding downward along the edge of the eaves (for example, the edge 14 in the embodiment) Provided with a chamfer 15 (in the embodiment), a chamfered portion (for example, the chamfered portion 16 in the embodiment) on the outside of the ridge, and a side wall (for example, the side wall 3 in the embodiment) of the electronic control unit, edges of the side walls (e.g., the leading edge 32 in the embodiment) chamfer on the outside of (e.g., chamfer 35 in the embodiment) is provided, the side and the chamfered portion of the ridge Characterized in that a chamfered portion formed by continuous.

請求項１に記載した発明によれば、コネクタの上方にある電子制御ユニットの筐体上面およびひさし上面に落下した水滴がひさしの縁部に至ると重力に従ってひさしの縁部の縦面を介して突条の外側に形成された面取り部に移動し、その後、より低い位置にある突条の最下部に達する。この突条の最下部はひさしの内側部分より下側に位置しているため、水滴の内側部分への回り込みを防止できる。また、面取り部が形成されていることから、面取り部と最下部とで水滴の表面張力のバランスを崩すことができ、水滴が小さい水滴となってスムーズに突条の最下部から下方に落下することとなる。したがって、水滴がひさしの下面に回り込んでひさしの基部側に移動するのを防止することができるので、コネクタや筐体の隙間などから水滴が浸入するのを防止することができる。   According to the first aspect of the present invention, when water drops that have dropped onto the housing upper surface and the eaves upper surface of the electronic control unit above the connector reach the edge of the eaves, they are passed through the vertical surface of the eaves edge according to gravity. It moves to the chamfered portion formed outside the ridge, and then reaches the lowermost portion of the ridge at a lower position. Since the lowermost part of this protrusion is located below the inner part of the eaves, it is possible to prevent water droplets from entering the inner part. Moreover, since the chamfered portion is formed, the balance of the surface tension of the water droplets can be broken between the chamfered portion and the lowermost portion, and the waterdrops become small waterdrops and smoothly fall downward from the lowermost portion of the ridge. It will be. Therefore, it is possible to prevent water droplets from entering the bottom side of the eaves and moving to the eaves base side, so that it is possible to prevent water droplets from entering from the gaps between the connectors and the housing.

さらに、ひさしを傾斜させる必要がないので、コネクタの抜き差しに必要な空間にひさしの縁部が張り出すことがなく、コネクタの抜き差し作業を容易に行うことができる。
また、突条の外側に面取り部を設けているので、コネクタを差し込む際に面取り部で案内することができ、作業性が向上する。 Furthermore, since there is no need to incline the eaves, the edge of the eaves does not protrude into the space required for inserting and removing the connector, and the connector can be easily inserted and removed.
Further, since the chamfered portion is provided on the outer side of the ridge, the chamfered portion can be guided when the connector is inserted, and workability is improved.

また、電子制御ユニット上面に落下した水滴が、側壁の縁部に沿って下方に移動する場合に、水滴は面取り部で案内されて筐体外側に向かって移動するため、側壁の内側に回り込むことがなく、したがって、水滴がコネクタや筐体の隙間などに浸入するのを防止することができる。 In addition , when water drops that have fallen on the upper surface of the electronic control unit move downward along the edge of the side wall, the water drops are guided by the chamfered part and moved toward the outside of the housing, so that they go around the inside of the side wall. Therefore, it is possible to prevent water droplets from entering the gap between the connector and the housing.

以下、この発明の実施の形態を図面に基づいて説明する。
図１において、符号１はこの発明の実施の形態の電子制御ユニットを示している。この実施の形態の電子制御ユニット１は、自動車等の車両に設けられた乗員保護装置であるエアバッグを制御するＥＣＵ（Electric Control Unit）を備えたものであって、車室内の図示しないインスツルメントパネル内部に配置されているものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, reference numeral 1 denotes an electronic control unit according to an embodiment of the present invention. An electronic control unit 1 according to this embodiment includes an ECU (Electric Control Unit) that controls an airbag, which is an occupant protection device provided in a vehicle such as an automobile, and is an instrument (not shown) in a vehicle compartment. It is arranged inside the ment panel.

このインスツルメントパネルの内部には、電子制御ユニット１以外に空調装置の室内ユニットも設けられており、この室内ユニットが吹き出し口の配置やスペースの都合上、インスツルメントパネル内の上部に搭載されている。すなわち、この室内ユニットの下方には上述した電子制御ユニット１を含む多様な部品が搭載されることとなる。そして、上記した室内ユニットは空調風を冷却するエバポレータを備えているため、このエバポレータの結露によって生じる水滴ｓが下方に落下する虞があり、上記電子制御ユニット１には、室内ユニットからの水滴が内部に浸入しないように防滴構造が設けられている。   In addition to the electronic control unit 1, an indoor unit for an air conditioner is also provided inside the instrument panel, and this indoor unit is mounted on the upper part of the instrument panel for the convenience of the arrangement of the outlet and space. Has been. That is, various parts including the electronic control unit 1 described above are mounted below the indoor unit. And since the above-mentioned indoor unit is provided with the evaporator which cools an air-conditioning wind, there exists a possibility that the water droplet s produced by the condensation of this evaporator may fall below, and the said electronic control unit 1 has the water droplet from an indoor unit. A drip-proof structure is provided so as not to enter the inside.

次に、電子制御ユニット１の防滴構造について具体的に説明する。
図１に示すように、電子制御ユニット１はその外周を囲う略箱型のケース本体２を備えており、このケース本体２の内部にＥＣＵ等を搭載した電子回路基板（図示せず）が収容されている。ケース本体２の左・右の側壁３，３（図示都合上、図１では右側の側壁３のみ示す）の下部には、それぞれ前後２箇所に左右方向に延びる固定部４が一体的に形成されており、この固定部４を介して図示しないビス等でインスツルメントパネル内部の所定箇所に固定される。ここで、図１に示すケース本体２は、電子制御ユニット１の幅および奥行きに対して高さ方向の寸法が短く設定されている。なお、図１において電子制御ユニット１の上下・左右・前後方向を図１中矢印で示している。 Next, the drip-proof structure of the electronic control unit 1 will be specifically described.
As shown in FIG. 1, the electronic control unit 1 includes a substantially box-shaped case body 2 that surrounds the outer periphery of the electronic control unit 1, and an electronic circuit board (not shown) on which an ECU or the like is mounted is accommodated in the case body 2. Has been. The left and right side walls 3 and 3 of the case body 2 (for convenience of illustration, only the right side wall 3 is shown in FIG. 1) are integrally formed with fixing portions 4 extending in the left-right direction at two front and rear positions. It is fixed to a predetermined location inside the instrument panel with a screw or the like (not shown) through the fixing portion 4. Here, the case body 2 shown in FIG. 1 is set such that the dimension in the height direction is shorter than the width and depth of the electronic control unit 1. In FIG. 1, the up / down, left / right, and front / rear directions of the electronic control unit 1 are indicated by arrows in FIG.

ケース本体２には開口部５が設けられており、この開口部５に電気配線を接続するためのコネクタ接続端子６が配置されている。このコネクタ接続端子６は、図２に示すように、その上面と下面との両方にコネクタ接続端子６の外周に沿って形成されたリング状の係止突起７を備えている。さらに、ケース本体２の下壁８にはコネクタ接続端子６の下面に沿う土手部９が形成されており、この土手部９の上面に上述した係止突起７に対応する溝１０が形成されている。この溝１０は、開口部５の幅方向に沿って形成されており、この溝１０に上述した係止突起７が没することで溝１０に係止突起７が係止され、コネクタ接続端子６がケース本体２の前後方向への移動が規制される。なお、土手部９、溝１０を上壁１１側に設けてコネクタ接続端子６の上面に設けられた係止突起７によって係止するようにしてもよい。   The case body 2 is provided with an opening 5, and a connector connection terminal 6 for connecting an electric wiring is disposed in the opening 5. As shown in FIG. 2, the connector connecting terminal 6 includes ring-shaped locking projections 7 formed along the outer periphery of the connector connecting terminal 6 on both the upper surface and the lower surface. Further, a bank portion 9 is formed on the lower wall 8 of the case body 2 along the lower surface of the connector connection terminal 6, and a groove 10 corresponding to the above-described locking projection 7 is formed on the upper surface of the bank portion 9. Yes. The groove 10 is formed along the width direction of the opening 5, and the locking protrusion 7 is locked in the groove 10 when the locking protrusion 7 described above is submerged in the groove 10. However, the movement of the case body 2 in the front-rear direction is restricted. The bank portion 9 and the groove 10 may be provided on the upper wall 11 side and locked by the locking protrusion 7 provided on the upper surface of the connector connection terminal 6.

一方、コネクタ接続端子６の上方にはこのコネクタ接続端子６を覆うようにひさし１２が設けられている。このひさし１２は、コネクタ接続端子６に対して接続される図示しない配線のコネクタ部を抜き差しする方向である水平方向に延出しており、ケース本体２の上壁１１と連なって一体的に形成されている。ここで、このひさし１２の前端部１３は、当該前端部１３の周辺から落ちる水滴ｓがコネクタ接続端子６に接触しない位置、すなわち、コネクタ接続端子６の前端部よりも所定の距離（図２中、Ｌで示す）だけ前方の位置となるようになっており、また、図示都合上省略しているが、ひさし１２の左右端部も水滴ｓがコネクタ接続端子６に接触しないように、コネクタ接続端子６の左右端部より所定距離だけ左右外側に張り出している。   On the other hand, an eaves 12 is provided above the connector connection terminal 6 so as to cover the connector connection terminal 6. The eaves 12 extend in the horizontal direction, which is a direction in which a connector portion of a wiring (not shown) connected to the connector connection terminal 6 is inserted and removed, and are formed integrally with the upper wall 11 of the case body 2. ing. Here, the front end portion 13 of the eaves 12 is positioned at a predetermined distance from the front end portion of the connector connection terminal 6 at a position where the water droplet s falling from the periphery of the front end portion 13 does not contact the connector connection terminal 6 (in FIG. , L) (not shown for convenience of illustration), the right and left ends of the eaves 12 are also connected to the connector so that the water droplets s do not contact the connector connecting terminal 6. The terminal 6 protrudes outward from the left and right ends by a predetermined distance.

また、ひさし１２の外縁である縁部１４には、その前縁１４ａからやや左右縁１４ｂに入り込む位置（図１参照）に渡って、下方へ突出する図３に示す突条１５が形成されている。そして、この突条１５の外側面、すなわちひさし１２の中心から見て外側となる部分に面取り部１６が形成されている。より具体的には、ひさし１２の縁部１４は、ひさし１２の上面１７から外側に凸となる曲面１８を介して上面１７に対して垂直となる縦面１９に至り、さらに、この縦面１９から外側に凸となる曲面２０を介して傾斜面である面取り部１６に至っている。この面取り部１６は、ひさし１２の外側から内側下方に向かって傾斜する略平面となっており、この面取り部１６の下端が外側に凸となる曲面２１を介して突条１５の最下部２２に至っている。そして、この突条１５の最下部２２からひさし１２の内側に形成された外側に凸となる曲面２３を介して上方に立ち上がり、水平方向に延びるひさし１２の下面と略直角に交わっている。ここで、上記面取り部１６の幅（図３中、ｍ１で示す）に対して最下部２２の幅（図３中、ｍ２で示す）が狭く形成されており、また、最下部２２の幅は一般的な水滴ｓの直径に対して十分小さくなるように設定されている。なお、上記した面取り部１６を略平面としたが曲率の緩やかな略凹面や略凸面であってもよい。   Further, the edge 14 which is the outer edge of the eaves 12 is formed with a ridge 15 shown in FIG. 3 that protrudes downward from a position (see FIG. 1) that slightly enters the left and right edges 14b from the front edge 14a. Yes. A chamfered portion 16 is formed on the outer surface of the ridge 15, that is, on the outer side when viewed from the center of the eaves 12. More specifically, the edge portion 14 of the eaves 12 reaches a vertical surface 19 that is perpendicular to the upper surface 17 via a curved surface 18 that protrudes outward from the upper surface 17 of the eaves 12. A chamfered portion 16 that is an inclined surface is led from the curved surface 20 to the outside. The chamfered portion 16 is a substantially flat surface inclined from the outside of the eaves 12 toward the inside and below, and the lower end of the chamfered portion 16 is formed on the lowermost portion 22 of the ridge 15 via a curved surface 21 that protrudes outward. Has reached. Then, the protrusion 15 rises upward from a lowermost portion 22 of the ridge 15 via an outwardly convex curved surface 23 formed on the inner side of the eaves 12, and intersects the lower surface of the eaves 12 extending in the horizontal direction at a substantially right angle. Here, the width of the lowermost part 22 (indicated by m2 in FIG. 3) is narrower than the width of the chamfered part 16 (indicated by m1 in FIG. 3), and the width of the lowermost part 22 is It is set to be sufficiently small with respect to the diameter of a general water droplet s. In addition, although the above-mentioned chamfered part 16 was made into the substantially plane, it may be a substantially concave surface or a substantially convex surface with a gentle curvature.

次に、上述したひさし１２を用いた防滴構造の作用を説明する。
図１、図２に示すように、まず初めに空調ユニットから落下してくる水滴ｓがケース本体２の上面およびひさし１２の上面１７に落ちる。そして、この水滴ｓが車両の走行で横方向に移動し、重力によってひさし１２の上面１７から縁部１４の縦面１９に回り込んで下方に移動しようとした場合、水滴ｓとひさし１２とが接触している部分において、水滴ｓとひさし１２とは互いの分子間力によって結合しようとする方向に力が作用するので、水滴ｓがひさし１２から離れ難くなる。他方、水滴ｓのひさし１２と接触していない部分においては、その表面張力によってより小さい水滴になろうとする。 Next, the operation of the drip-proof structure using the above eaves 12 will be described.
As shown in FIGS. 1 and 2, first, water drops s falling from the air conditioning unit fall on the upper surface of the case body 2 and the upper surface 17 of the eaves 12. Then, when the water droplet s moves laterally as the vehicle travels, and tries to move downward from the upper surface 17 of the eaves 12 to the vertical surface 19 of the edge portion 14 by gravity, the water droplets s and the eaves 12 are In the contacted portion, the water droplet s and the eaves 12 are exerted in a direction in which the water droplets s and the eaves 12 are to be combined with each other due to the intermolecular force. On the other hand, in the portion of the water droplet s that is not in contact with the eaves 12, the surface tension tends to be a smaller water droplet.

つまり、水滴ｓがひさし１２の縁部１４からひさし１２の下面側に回り込もうとしたときに、面取り部１６では水滴ｓとひさし１２との接触面積が相対的に大きなものとなるが、その後重力によって水滴ｓが面取り部１６から突条１５の最下部２２に至ったときに、実質的に水滴ｓとひさし１２との接触面積が減少することとなる。そのため、水滴ｓの分子間力すなわち水滴ｓの表面張力のバランスが崩れてしまい、水滴ｓがより小さい水滴となって突条１５の最下部２２から下方に落下することとなる。なお、図示都合上、図２に示す水滴ｓの大きさが略同一であるが、上記のように縁部１４を回り込む水滴ｓよりも落下する水滴ｓは小さな水滴となる。   That is, when the water droplet s tries to go around from the edge portion 14 of the eaves 12 to the lower surface side of the eaves 12, the chamfered portion 16 has a relatively large contact area between the water droplet s and the eaves 12, When the water droplet s reaches from the chamfered portion 16 to the lowermost portion 22 of the ridge 15 due to gravity, the contact area between the water droplet s and the eaves 12 is substantially reduced. As a result, the intermolecular force of the water droplet s, that is, the balance of the surface tension of the water droplet s is lost, and the water droplet s becomes a smaller water droplet and falls downward from the lowermost portion 22 of the protrusion 15. For the sake of illustration, the size of the water droplet s shown in FIG. 2 is substantially the same, but the water droplet s falling from the water droplet s that wraps around the edge 14 as described above is a small water droplet.

ところで、ひさし１２の上面に落下した水滴ｓは、ひさし１２の左・右縁部１４ｂ，１４ｂの基部側からコネクタ接続端子６側に回り込むことや、ケース本体２の側壁３の端部３０に沿って下方に移動しつつ、この端部３０からコネクタ接続端子６側に回り込んでしまうことがある。そのため、このケース本体２には、側壁３の最前部である端部３０にも防滴構造が設けられている。   By the way, the water drop s falling on the upper surface of the eaves 12 wraps around from the base side of the left and right edge portions 14b, 14b of the eaves 12 toward the connector connection terminal 6 or along the end portion 30 of the side wall 3 of the case body 2. In some cases, the end portion 30 may wrap around toward the connector connection terminal 6 while moving downward. For this reason, the case body 2 is also provided with a drip-proof structure at the end 30 which is the foremost part of the side wall 3.

図５に示すように、ケース本体２の側壁３は、端部３０においてケース本体２の開口部５のコネクタ接続端子６に向かって屈曲形成されており、この屈曲形成されている部分のやや内側位置から前方に向かって延出する壁部３１を備えている。この壁部３１は側壁３の最前部を構成しており、壁部３１から側壁３の後部までこれらの外面が連なるように一体的に形成されている。   As shown in FIG. 5, the side wall 3 of the case main body 2 is bent toward the connector connection terminal 6 of the opening 5 of the case main body 2 at the end portion 30, and slightly inside the bent portion. A wall portion 31 extending forward from the position is provided. The wall portion 31 constitutes the foremost portion of the side wall 3 and is integrally formed so that these outer surfaces are continuous from the wall portion 31 to the rear portion of the side wall 3.

図４に示すように、壁部３１の前縁３２は、前述した側壁３の屈曲形成されている部分の下部から外側に向かって凸状となる曲部３３を経て、コネクタ接続端子６の前端よりもやや後方の位置でコネクタ接続端子６の側縁６ｂと略平行となるように立ち上がっており、さらに、前縁３２の上部では、上方に向かうにつれて徐々にひさし１２の前縁１４ａ側に向かう凹状の曲部３４を経て、ひさし１２の左右縁部１４ｂの略中間位置で前述した突条１５に合流して形成されている。   As shown in FIG. 4, the front edge 32 of the wall portion 31 passes through a bent portion 33 that protrudes outward from the lower portion of the bent portion of the side wall 3 described above, and then the front end of the connector connection terminal 6. It rises so as to be substantially parallel to the side edge 6b of the connector connecting terminal 6 at a slightly rearward position, and further toward the front edge 14a side of the eaves 12 at the upper part of the front edge 32 as it goes upward. It is formed through the concave curved portion 34 and joined to the above-described protrusion 15 at a substantially intermediate position between the left and right edge portions 14b of the eaves 12.

そして、図４，５に示すように、壁部３１の前縁３２には、その外側に面取り部３５が設けられており、この面取り部３５が壁部３１の厚さ方向中心よりもややケース本体２の内側から外側ほど後方に向かう傾斜面で構成されている。また、上述したように壁部３１の前縁３２の上部が突条１５に合流して形成されていることで、壁部３１の面取り部３５が上述した突条１５の面取り部１６と連続して形成されることとなる。ここで、壁部３１の外面３６と面取り部３５との間には曲面３７が形成され、面取り部３５と壁部３１の内面３８との間には曲面３９が設けられている。   As shown in FIGS. 4 and 5, the front edge 32 of the wall portion 31 is provided with a chamfered portion 35 on the outer side, and the chamfered portion 35 is slightly in the case from the thickness direction center of the wall portion 31. It is comprised by the inclined surface which goes back toward the back from the inner side of the main body 2. Further, as described above, the upper portion of the front edge 32 of the wall portion 31 is formed so as to merge with the ridge 15, so that the chamfered portion 35 of the wall portion 31 continues to the chamfered portion 16 of the ridge 15 described above. Will be formed. Here, a curved surface 37 is formed between the outer surface 36 of the wall portion 31 and the chamfered portion 35, and a curved surface 39 is provided between the chamfered portion 35 and the inner surface 38 of the wall portion 31.

次に、上述した壁部３１の防滴構造における作用を説明する。まず、ケース本体２の上面１７および、これと連なるひさし１２の上面に落下した水滴ｓが移動して、重力により壁部３１の前縁３２に沿って下方に流れ落ちる。ここで、図５に示すように、前縁３２の外側に平らな傾斜面である面取り部３５が形成されているため、水滴ｓと壁部３１との接触面積は壁部３１外側の面取り部３５（その幅を図４中、ｍ４で示す）よりも、内側の曲面３９(その幅を図４中、ｍ３で示す）の方が実質的に狭くなる。そして、水滴ｓは水に作用する分子間力と壁部３１に作用する分子間力とによって、壁部３１と水滴ｓとの結合する力が作用するので、接触面積が狭い方よりも広い方へ移動しようとし、この結果、前縁３２に沿って流れ落ちる水滴ｓは、図５中の矢印で示す、ケース本体２外側に向かって移動することとなる。   Next, the effect | action in the drip-proof structure of the wall part 31 mentioned above is demonstrated. First, the water droplet s that has fallen on the upper surface 17 of the case main body 2 and the upper surface of the eaves 12 connected thereto moves, and flows down downward along the front edge 32 of the wall portion 31 due to gravity. Here, as shown in FIG. 5, the chamfered portion 35, which is a flat inclined surface, is formed outside the front edge 32, so that the contact area between the water droplet s and the wall portion 31 is the chamfered portion outside the wall portion 31. The inner curved surface 39 (its width is indicated by m3 in FIG. 4) is substantially narrower than 35 (its width is indicated by m4 in FIG. 4). The water droplet s has a larger contact area than the one with a smaller contact area because the force between the wall portion 31 and the water droplet s acts due to the intermolecular force acting on the water and the intermolecular force acting on the wall portion 31. As a result, the water droplet s flowing down along the front edge 32 moves toward the outside of the case body 2 indicated by an arrow in FIG.

ここで、壁部３１の上部に形成された曲部３４おいては、上述した突条１５の作用と壁部３１の前縁３２の作用が両方現れる。すなわち、水滴ｓの大きさにもよるが、落下するものと面取り部１６，３５に沿って流れ落ちるものとが両方出現することとなり、いずれの場合も突条１５および壁部３１よりもコネクタ接続端子６側へ水滴ｓが浸入するのが防止される。なお、壁部３１の下部に形成された曲部３３においては、適宜面取り部３５を設ければよい。   Here, in the curved part 34 formed in the upper part of the wall part 31, both the effect | action of the protrusion 15 mentioned above and the effect | action of the front edge 32 of the wall part 31 appear. That is, although depending on the size of the water droplet s, both a falling thing and a thing flowing down along the chamfered portions 16 and 35 appear. In either case, the connector connecting terminal is more than the protrusion 15 and the wall portion 31. Water droplets s are prevented from entering the 6 side. In addition, in the curved part 33 formed in the lower part of the wall part 31, the chamfer part 35 should just be provided suitably.

したがって、上述した実施の形態によれば、水滴ｓとひさし１２との接触面積の急激な縮小によって水滴ｓの表面張力のバランスが崩れ、水滴ｓがより小さい水滴となってスムーズに突条１５の最下部２２から下方に落下することとなるため、水滴ｓがひさし１２の下面に回り込んでひさし１２の基部側に移動するのを防止することができるので、コネクタ接続端子６やケース本体２の隙間などから水滴ｓが浸入するのを防止することができる。   Therefore, according to the above-described embodiment, the balance of the surface tension of the water droplets s is lost due to the rapid reduction of the contact area between the water droplets s and the eaves 12, and the water droplets s become smaller water droplets and smoothly. Since the water drops s fall downward from the lowermost part 22, it is possible to prevent the water droplets s from entering the lower surface of the eaves 12 and moving to the base side of the eaves 12. It is possible to prevent the water droplets s from entering from the gap or the like.

そして、突条１５の外側に面取り部１６を設けているので、コネクタを差し込む際に面取り部１６で案内することができ、作業性が向上する。
また、従来のようにひさし１２を傾斜させて設ける必要がないので、コネクタの抜き差しに必要な空間にひさし１２の縁部１４が張り出すことがなく、コネクタの抜き差し作業を容易に行うことができる。 And since the chamfering part 16 is provided in the outer side of the protrusion 15, it can guide by the chamfering part 16 when inserting a connector, and workability | operativity improves.
Further, since it is not necessary to provide the eaves 12 with an inclination as in the prior art, the edge portion 14 of the eaves 12 does not protrude into a space necessary for the insertion and removal of the connector, and the connector can be easily inserted and removed. .

さらに、電子制御ユニット１の上面１７に落下した水滴ｓが側壁３を形成する壁部３１の前縁３２に沿って下方に流れ落ちるときに、水滴ｓが接触面積の広くなる面取り部３５の方向、すなわちケース本体２の外側に向かって進行するため、側壁３から内側に入り込むことがなく、したがって、水滴ｓがコネクタ接続端子６やケース本体２の隙間などに浸入するのを防止することができる。   Furthermore, when the water droplet s falling on the upper surface 17 of the electronic control unit 1 flows downward along the front edge 32 of the wall portion 31 forming the side wall 3, the direction of the chamfered portion 35 in which the water droplet s increases in contact area, That is, since it proceeds toward the outside of the case body 2, it does not enter the inside from the side wall 3, and therefore, it is possible to prevent the water droplets s from entering the connector connection terminal 6, the gap between the case body 2, and the like.

尚、この発明は上述したエアバッグ用の電子制御ユニットの防滴構造に限られるものではなく、前後左右の側壁（縦壁）にコネクタ接続口などを備えるものであれば用いることができる。
また、上記実施の形態ではコネクタ接続端子６を係止している場合について説明したが、固定方法はこれに限られず、例えば、接着や圧入など適宜用いればよい。
そして、ひさし１２の縁部１４に下方に向かって突出する突条１５を設ける場合について説明したが、下方に突出させずに、例えば、突条１５とひさし１２の下面との間に最下部２２よりも十分に大きい幅を有した溝を形成するようにしてもよい。 Note that the present invention is not limited to the above-described drip-proof structure of the electronic control unit for an airbag, and can be used as long as it includes connector connection ports on the front, rear, left and right side walls (vertical walls).
Moreover, although the said embodiment demonstrated the case where the connector connection terminal 6 was latched, the fixing method is not restricted to this, For example, what is necessary is just to use suitably, such as adhesion | attachment and press fit.
And although the case where the protrusion 15 which protrudes below was provided in the edge part 14 of the eaves 12 was demonstrated, it does not protrude below, for example, the lowest part 22 between the protrusion 15 and the lower surface of the eaves 12 Alternatively, a groove having a sufficiently larger width may be formed.

本発明の実施の形態における電子制御ユニットの斜視である。It is a perspective view of the electronic control unit in embodiment of this invention. 本発明の実施の形態における図１のＡ−Ａ線に沿う断面図である。It is sectional drawing which follows the AA line of FIG. 1 in embodiment of this invention. 本発明の実施の形態における図２のひさし１２の縁部１４を拡大した断面図である。It is sectional drawing to which the edge part 14 of the eaves 12 of FIG. 2 in the embodiment of this invention was expanded. 本発明の実施の形態における電子制御ユニットの側面図である。It is a side view of the electronic control unit in an embodiment of the invention. 本発明の実施の形態における図１のＢ−Ｂ線に沿う断面図である。It is sectional drawing which follows the BB line of FIG. 1 in embodiment of this invention.

符号の説明Explanation of symbols

１ 電子制御ユニット
３ 側壁
６ コネクタ接続端子
１２ ひさし
１４ 縁部
１５ 突条
１６ 面取り部
３２ 前縁（側壁の縁部）
３５ 面取り部 DESCRIPTION OF SYMBOLS 1 Electronic control unit 3 Side wall 6 Connector connection terminal 12 Eaves 14 Edge 15 Projection 16 Chamfering part 32 Front edge (edge of side wall)
35 Chamfer

Claims (1)

コネクタの上方を覆うひさしを備えた電子制御ユニットの防滴構造において、
前記ひさしの縁部に、この縁部に沿って下方に突出する突条を設け、該突条の外側に面取り部を設け、
前記電子制御ユニットの側壁には、該側壁の縁部の外側に面取り部を設け、
前記突条の面取り部と前記側壁の面取り部とを連続して形成したことを特徴とする電子制御ユニットの防滴構造。 In the drip-proof structure of the electronic control unit with the eaves covering the upper part of the connector,
Provided on the edge of the eaves a ridge that protrudes downward along the edge, and provided a chamfered portion on the outside of the ridge,
The side wall of the electronic control unit is provided with a chamfered portion outside the edge of the side wall ,
A drip-proof structure for an electronic control unit, wherein the chamfered portion of the protrusion and the chamfered portion of the side wall are continuously formed .
JP2006314104A 2006-11-21 2006-11-21 Drip-proof structure of electronic control unit Expired - Fee Related JP4588690B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006314104A JP4588690B2 (en) 2006-11-21 2006-11-21 Drip-proof structure of electronic control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006314104A JP4588690B2 (en) 2006-11-21 2006-11-21 Drip-proof structure of electronic control unit

Publications (2)

Publication Number Publication Date
JP2008130359A JP2008130359A (en) 2008-06-05
JP4588690B2 true JP4588690B2 (en) 2010-12-01

Family

ID=39555992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006314104A Expired - Fee Related JP4588690B2 (en) 2006-11-21 2006-11-21 Drip-proof structure of electronic control unit

Country Status (1)

Country Link
JP (1) JP4588690B2 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5040905B2 (en) * 2008-12-24 2012-10-03 トヨタ自動車株式会社 Temperature control structure of power storage device
JP5903057B2 (en) * 2013-02-14 2016-04-13 オートリブ ディベロップメント エービー Electronic control unit
JP2014157694A (en) * 2013-02-15 2014-08-28 Omron Automotive Electronics Co Ltd Switching device
JP5892087B2 (en) * 2013-03-01 2016-03-23 株式会社デンソー Electronic control unit for vehicle and manufacturing method thereof
JP6063905B2 (en) * 2014-07-04 2017-01-18 本田技研工業株式会社 Drip-proof structure of electronic equipment
JP6588202B2 (en) * 2014-12-05 2019-10-09 株式会社デンソーテン Electronic equipment
JP6541989B2 (en) * 2015-02-27 2019-07-10 文化シヤッター株式会社 Control panel and switchgear
JP6594717B2 (en) * 2015-09-17 2019-10-23 株式会社デンソーテン Waterproof structure
JP6493169B2 (en) * 2015-11-16 2019-04-03 トヨタ自動車株式会社 Electronics
KR101786635B1 (en) 2016-06-27 2017-10-18 현대오트론 주식회사 Electronic control unit
JP6757239B2 (en) * 2016-12-14 2020-09-16 株式会社デンソー In-vehicle power supply
JP7210879B2 (en) * 2018-01-12 2023-01-24 株式会社デンソー electronic device
JP7314563B2 (en) * 2019-03-26 2023-07-26 三菱自動車工業株式会社 Waterproof structure of the housing that houses the electronic control unit for vehicle control

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04324271A (en) * 1991-04-24 1992-11-13 Matsushita Electric Works Ltd Wire lead-in plate
JPH0725597U (en) * 1993-10-13 1995-05-12 矢崎総業株式会社 Rain cover for spark plug mounting hole
JPH09232026A (en) * 1996-02-20 1997-09-05 Sumitomo Wiring Syst Ltd Connector
JPH09232027A (en) * 1996-02-20 1997-09-05 Sumitomo Wiring Syst Ltd Connector
JP2004297975A (en) * 2003-03-28 2004-10-21 Yazaki Corp Waterproofing structure for electric junction box

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04324271A (en) * 1991-04-24 1992-11-13 Matsushita Electric Works Ltd Wire lead-in plate
JPH0725597U (en) * 1993-10-13 1995-05-12 矢崎総業株式会社 Rain cover for spark plug mounting hole
JPH09232026A (en) * 1996-02-20 1997-09-05 Sumitomo Wiring Syst Ltd Connector
JPH09232027A (en) * 1996-02-20 1997-09-05 Sumitomo Wiring Syst Ltd Connector
JP2004297975A (en) * 2003-03-28 2004-10-21 Yazaki Corp Waterproofing structure for electric junction box

Also Published As

Publication number Publication date
JP2008130359A (en) 2008-06-05

Similar Documents

Publication Publication Date Title
JP4588690B2 (en) Drip-proof structure of electronic control unit
US6857676B2 (en) Vehicular cigarette lighter device
EP2366569B1 (en) Structure for cooling heating element
US7544887B2 (en) Electrical junction box
JP2002362254A (en) Mounting structure of apparatus for vehicle
JP2005119331A (en) Electric junction box
JP2008068807A (en) Vehicular steering column cover structure
JP5590065B2 (en) Electronic control unit for vehicle
JP5057037B2 (en) Battery arrangement structure for automobiles
JP5614998B2 (en) Vehicle electronics
JP4266212B2 (en) Vehicle front structure
JP2018095090A (en) Attachment structure of on-vehicle control device
JP6588202B2 (en) Electronic equipment
US10122159B2 (en) Electric connection box
JP2009046064A (en) Console
JP5071030B2 (en) In-vehicle electrical junction box
JP6182089B2 (en) Instrument panel structure
JP2007205759A (en) Gyro substrate mounting structure of on-vehicle navigation device
JP6222694B2 (en) Connector fixing structure for vehicle
JP5445414B2 (en) Vehicle front structure
JP2020157996A (en) Attachment structure of on-vehicle devices
JP2020131889A (en) Intake structure for vehicle
JP4930017B2 (en) Engine cover back surface drip-proof structure
JP5060989B2 (en) Electronic board housing case
JP2018158615A (en) Structure for mounting electronic control device in vehicle body

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090810

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090915

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20091109

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100413

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100520

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100831

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100908

R150 Certificate of patent or registration of utility model

Ref document number: 4588690

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130917

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140917

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees