JP2013070487A - Housing of ecu - Google Patents

Housing of ecu Download PDF

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Publication number
JP2013070487A
JP2013070487A JP2011206265A JP2011206265A JP2013070487A JP 2013070487 A JP2013070487 A JP 2013070487A JP 2011206265 A JP2011206265 A JP 2011206265A JP 2011206265 A JP2011206265 A JP 2011206265A JP 2013070487 A JP2013070487 A JP 2013070487A
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Prior art keywords
resin
housing
ecu
foamed resin
molded
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JP2011206265A
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Japanese (ja)
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Akihiro Ozeki
明弘 尾関
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Toyota Motor Corp
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Toyota Motor Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a housing of an ECU which prevents the damage to mounted components even if resin mold is directly performed on a mounting substrate and which is lightweight and robust.SOLUTION: A housing 3 of an on-vehicle ECU 1 includes: a foamed resin 3a molding a mounting substrate 2; and a resin housing 3b molded to the outer side of the foamed resin. Since the mounting substrate is molded by the foam resin that is lightweight and has good formability, a lightweight ECU housing is obtained and the damage to mounting components is prevented. Further, the resin housing is molded to the outer side of the foam resin, and thereby making the ECU housing robust.

Description

本発明は、車載されるECUの筐体に関する。   The present invention relates to a casing of an ECU mounted on a vehicle.

近年、車載パーツの各種制御を行うECU(Electronic Control Unit)が多数備えられるようになった。これら車載ECUの筐体としてPBT(polybutylene terephthalate:ポリブチレンテレフタレート)等の樹脂が多く使用されている。
図3に、ECUの一例としてのECU101の断面構成を示す。ECU101の組み立てにおいては、実装基板102がネジ104で締結されるなどして筐体103に組み付けられる。実装基板102は、回路基板102aに1つ以上の回路素子102bおよびコネクタ102cが実装された構成である。
In recent years, many ECUs (Electronic Control Units) that perform various controls of in-vehicle parts have been provided. A resin such as PBT (polybutylene terephthalate) is often used as a casing of these in-vehicle ECUs.
FIG. 3 shows a cross-sectional configuration of the ECU 101 as an example of the ECU. In assembling the ECU 101, the mounting substrate 102 is assembled to the housing 103 by being fastened with screws 104. The mounting board 102 has a configuration in which one or more circuit elements 102b and a connector 102c are mounted on the circuit board 102a.

上記のように実装基板を組み付けるのに手間が掛かることや、樹脂成型の都合上から筐体の形状が制限されることでECUの占有体積が思うように小さくならないといった不都合を解消する手法も存在する。   There are also methods to eliminate the inconveniences such as the time required for assembling the mounting board as described above and the fact that the volume occupied by the ECU does not become as small as expected due to the restriction of the shape of the housing for the convenience of resin molding To do.

図4は、このような手法により作製されたECU111の断面構成を示している。
ECU111が備える筐体113は、実装基板102に直接に樹脂モールドを行って形成される。この場合には、回路素子102bやコネクタ102cなどの実装部品の表面を柔らかい樹脂が覆う程度に成型が行われる。
FIG. 4 shows a cross-sectional configuration of the ECU 111 manufactured by such a method.
The housing 113 provided in the ECU 111 is formed by directly performing resin molding on the mounting substrate 102. In this case, the molding is performed to such an extent that the surface of the mounting component such as the circuit element 102b or the connector 102c is covered with a soft resin.

また、特許文献1には、ケース内に樹脂が充填されている筐体が開示されている。特許文献2には、ECU基板を樹脂でモールドし、ECUケースに収容する構成が開示されている。   Patent Document 1 discloses a housing in which a case is filled with resin. Patent Document 2 discloses a configuration in which an ECU board is molded with resin and accommodated in an ECU case.

特開2003−170788号公報JP 2003-170788 A 特開2007−320460号公報JP 2007-320460 A

しかしながら、図4に示す構成の筐体113では、樹脂が柔らかいために車載ECUの筐体として耐久性のあるものが得られない。この筐体113には実装基板102の組み付けの手間を省くことができるという長所があるが、この手法は多数の背反があるためにあまり実施されていない。例えば、ブラケットの取り付けや外形を作ることで重くなるといった欠点を生ずる。一方、PBT等の樹脂は一般的に高温・高圧での射出成型で形成される。従って、図4のように回路素子102bやコネクタ102cが実装された実装基板102に対して直接に成型を行おうとすると、上記射出成型時の条件に見合う耐熱性や耐圧性を備えていない実装部品が損傷を受けてしまう。   However, in the case 113 having the configuration shown in FIG. 4, since the resin is soft, a durable case cannot be obtained as the case of the in-vehicle ECU. Although this case 113 has an advantage that it is possible to save the trouble of assembling the mounting substrate 102, this method is not often implemented because there are many contradictions. For example, there is a disadvantage that it becomes heavy by attaching a bracket or making an outer shape. On the other hand, a resin such as PBT is generally formed by injection molding at high temperature and high pressure. Therefore, when the molding is performed directly on the mounting substrate 102 on which the circuit element 102b and the connector 102c are mounted as shown in FIG. 4, the mounting component does not have heat resistance and pressure resistance that meet the conditions at the time of the injection molding. Will be damaged.

また、ECUの搭載を考慮した筐体の外形を成そうとすると、PBT等では樹脂量が多くなって質量が大きくなりすぎてしまう。   In addition, when trying to form the outer shape of the housing in consideration of mounting of the ECU, the amount of resin in PBT or the like increases and the mass becomes too large.

本発明は、上記課題を解決するものであり、実装基板に直接に樹脂モールドを行っても、実装部品に損傷を与えることがないとともに、軽量で堅固なECUの筐体を提供することを目的とする。   SUMMARY OF THE INVENTION An object of the present invention is to solve the above-described problems, and to provide a lightweight and robust ECU housing that does not damage mounted components even when resin molding is directly performed on a mounting board. And

本発明に係るECUの筐体は、実装基板をモールドした発泡樹脂と、前記発泡樹脂の外側にモールドされた樹脂筐体とを備えている。   The ECU casing according to the present invention includes a foamed resin in which a mounting substrate is molded, and a resin casing molded on the outside of the foamed resin.

また、前記実装基板上で放熱が必要な部位を覆う前記発泡樹脂は、他の部位を覆う前記発泡樹脂よりも薄くてもよい。   In addition, the foamed resin that covers the portion that needs to be radiated on the mounting substrate may be thinner than the foamed resin that covers the other portion.

本発明の構成によれば、軽量で成形性に富む樹脂である発泡樹脂によって実装基板をモールドするので、軽量なECUの筐体が得られるとともに、実装部品が損傷を受けることがない。また、発泡樹脂の外側に樹脂筐体がモールドされていることによって、ECUの筐体は堅固である。   According to the configuration of the present invention, since the mounting substrate is molded with the foamed resin which is a lightweight and highly moldable resin, a lightweight ECU casing is obtained, and the mounted components are not damaged. Further, since the resin casing is molded on the outside of the foamed resin, the casing of the ECU is solid.

本発明の実施形態に係るECU筐体の構成を示す断面図である。It is sectional drawing which shows the structure of ECU housing | casing which concerns on embodiment of this invention. 本発明の他の実施形態に係るECU筐体の構成を示す断面図である。It is sectional drawing which shows the structure of the ECU housing | casing which concerns on other embodiment of this invention. 従来技術を示すものであり、ECU筐体の構成を示す断面図である。It is a sectional view showing the prior art and showing the configuration of an ECU housing. 従来技術を示すものであり、ECU筐体の他の構成を示す断面図である。It is sectional drawing which shows a prior art and shows the other structure of ECU housing | casing.

本発明の実施形態について図1および図2を用いて説明すれば以下の通りである。   The embodiment of the present invention will be described with reference to FIGS. 1 and 2 as follows.

図1に、本実施形態に係るECU1の構成を示す。
ECU1は、実装基板2および筐体(ECUの筐体)3を備えている。
FIG. 1 shows a configuration of the ECU 1 according to the present embodiment.
The ECU 1 includes a mounting substrate 2 and a housing (ECU housing) 3.

実装基板2は、回路基板2aに1つ以上の回路素子2bとコネクタ2cとを含む部品が実装された構成である。筐体3は、発泡樹脂3aと樹脂筐体3bとを備えている。   The mounting board 2 has a configuration in which components including one or more circuit elements 2b and a connector 2c are mounted on the circuit board 2a. The housing 3 includes a foamed resin 3a and a resin housing 3b.

筺体3において、発泡樹脂3aは実装基板2をモールドしている。発泡樹脂3aによるモールド箇所は、少なくとも、回路素子2bのパッケージと、回路素子2bおよびコネクタ2cなどの実装部品から回路基板2aへと露出した導通箇所と、回路基板2a上の露出した導通箇所と、を埋め込むように設けられている。コネクタ2cのECU1の外部との接続箇所は、筐体3の外部に露出している。発泡樹脂として、ポリウレタン、ポリスチレン、ポリオレフィン、フェノール樹脂、ポリ塩化ビニル、ユリア樹脂、シリコーン、ポリイミド、メラミン樹脂などを使用することができる。   In the housing 3, the foamed resin 3 a molds the mounting substrate 2. Molded portions of the foamed resin 3a include at least a package of the circuit element 2b, a conductive portion exposed from the mounting component such as the circuit element 2b and the connector 2c to the circuit board 2a, an exposed conductive portion on the circuit board 2a, Is provided to be embedded. A connection portion of the connector 2c with the outside of the ECU 1 is exposed to the outside of the housing 3. As the foamed resin, polyurethane, polystyrene, polyolefin, phenol resin, polyvinyl chloride, urea resin, silicone, polyimide, melamine resin, or the like can be used.

当該発泡樹脂3aは、実装基板2に対して仮モールドによって筐体3のおおよそのボディ形状を決定するように成型されている。発泡樹脂は軽量であって、実装部品に損傷を与えない。なお、仮モールドに用いる樹脂には、発泡樹脂以外にも、軽量であって実装部品に損傷を与えない素材であれば適用することが可能である。すなわち、密度が低く、ある程度形状が保てる素材であればよい。   The foamed resin 3a is molded on the mounting substrate 2 so as to determine the approximate body shape of the housing 3 by temporary molding. The foamed resin is lightweight and does not damage the mounted components. In addition to the foamed resin, any resin that is lightweight and does not damage the mounted component can be applied to the resin used for the temporary mold. That is, any material that has a low density and can maintain a certain shape can be used.

また、樹脂筐体3bは、上記の仮モールドした発泡樹脂3aの外側に続けてモールドされた、本体筐体として使用可能な気密性を有する樹脂からなる。樹脂筐体の材質として、PBT(polybutylene terephthalate:ポリブチレンテレフタレート)、PPS(poly phenylene sulfide:ポリフェニレンサルファイド)等の樹脂を用いることが可能である。   Further, the resin casing 3b is made of a resin having airtightness that can be used as a main body casing, which is molded after the temporarily molded foamed resin 3a. As a material of the resin casing, it is possible to use a resin such as PBT (polybutylene terephthalate) or PPS (polyphenylene sulfide).

このように、本実施形態に係る筐体3によれば、軽量かつ成形性に富む樹脂である発泡樹脂3aによって実装基板2をモールドするので、軽量なECU1の筐体が得られるとともに、実装部品が損傷を受けることがない。また、発泡樹脂3aの外側に樹脂筐体3bがモールドされていることによって、ECU1の筐体は堅固である。   As described above, according to the housing 3 according to the present embodiment, the mounting substrate 2 is molded with the foamed resin 3a which is a lightweight and highly moldable resin. Will not be damaged. Further, since the resin casing 3b is molded on the outside of the foamed resin 3a, the casing of the ECU 1 is solid.

次に、図2に、本実施形態の変形例に係るECU11の構成を示す。図1と同じ部材には同じ符号が付されている。
ECU11は、実装基板2および筐体(ECUの筐体)13を備えている。
Next, FIG. 2 shows a configuration of the ECU 11 according to a modification of the present embodiment. The same members as those in FIG. 1 are denoted by the same reference numerals.
The ECU 11 includes a mounting substrate 2 and a housing (ECU housing) 13.

筐体13は、発泡樹脂13aと樹脂筐体13bとを備えている。発泡樹脂13aおよび樹脂筐体13bの材質は図1の場合と同じでよい。   The housing 13 includes a foamed resin 13a and a resin housing 13b. The material of the foamed resin 13a and the resin casing 13b may be the same as in FIG.

実装基板2の回路素子2bである回路素子2b−xは、動作中の発熱が大きいために何らかの放熱対策が必要な素子である。発泡樹脂13aにより回路素子2b−xが埋め込まれると、断熱効果により十分な放熱が困難になる場合には、図2に示すように回路素子2b−xの上方の位置Xを発泡樹脂13aで仮モールドしないようにする。あるいは、仮モールドにおいて、表面形状を変えるように、位置Xの発泡樹脂13aを放熱対策が不要な他の部位よりも薄く形成する。樹脂筐体13bは、仮モールドの後に図1と同様にモールドされる。   The circuit element 2b-x, which is the circuit element 2b of the mounting substrate 2, is an element that requires some heat dissipation measures because it generates a large amount of heat during operation. When the circuit element 2b-x is embedded with the foamed resin 13a, if sufficient heat dissipation is difficult due to the heat insulation effect, the position X above the circuit element 2b-x is temporarily set with the foamed resin 13a as shown in FIG. Do not mold. Alternatively, in the temporary mold, the foamed resin 13a at the position X is formed to be thinner than other portions that do not require heat dissipation measures so as to change the surface shape. The resin casing 13b is molded in the same manner as in FIG. 1 after the temporary molding.

このように、筐体13によれば、実装基板2上で放熱が必要な部位を覆う発泡樹脂13aは、厚みゼロの場合も含めて、他の部位を覆う発泡樹脂13aよりも薄い。従って、図1の筐体3による効果に加えて、良好な放熱を施すことができる。   Thus, according to the housing | casing 13, the foamed resin 13a which covers the site | part which needs heat radiation on the mounting board | substrate 2 is thinner than the foamed resin 13a which covers another site | part including the case where thickness is zero. Therefore, in addition to the effect of the housing 3 in FIG. 1, good heat dissipation can be performed.

本発明のECUの筐体は、例えば車両に小型軽量で耐久性を有するECUを搭載したい箇所に好適に使用することができる。   The casing of the ECU of the present invention can be suitably used, for example, in a place where it is desired to mount a small, lightweight and durable ECU in a vehicle.

1、11 ECU
2 実装基板
3、13 筐体(ECUの筐体)
3a、13a 発泡樹脂
3b、13b 樹脂筐体
1, 11 ECU
2 Mounting board 3, 13 Housing (ECU housing)
3a, 13a Foamed resin 3b, 13b Resin housing

Claims (2)

ECUの筐体であって、
実装基板をモールドした発泡樹脂と、
前記発泡樹脂の外側にモールドされた樹脂筐体とを備えていることを特徴とするECUの筐体。
An ECU housing,
Foamed resin molded mounting board,
An ECU housing comprising a resin housing molded on the outside of the foamed resin.
前記実装基板上で放熱が必要な部位を覆う前記発泡樹脂は、他の部位を覆う前記発泡樹脂よりも薄いことを特徴とする請求項1に記載のECUの筐体。   2. The ECU casing according to claim 1, wherein the foamed resin that covers a portion that requires heat dissipation on the mounting substrate is thinner than the foamed resin that covers another portion.
JP2011206265A 2011-09-21 2011-09-21 Housing of ecu Withdrawn JP2013070487A (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011206265A JP2013070487A (en) 2011-09-21 2011-09-21 Housing of ecu

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JP2011206265A Withdrawn JP2013070487A (en) 2011-09-21 2011-09-21 Housing of ecu

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018061564A1 (en) * 2016-09-30 2018-04-05 シャープ株式会社 Imaging device
JP2019016689A (en) * 2017-07-06 2019-01-31 株式会社ケーヒン Electronic control device and manufacturing method of the same
JP2019040942A (en) * 2017-08-23 2019-03-14 沖電気工業株式会社 Electronic apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018061564A1 (en) * 2016-09-30 2018-04-05 シャープ株式会社 Imaging device
JP2019016689A (en) * 2017-07-06 2019-01-31 株式会社ケーヒン Electronic control device and manufacturing method of the same
JP7053177B2 (en) 2017-07-06 2022-04-12 日立Astemo株式会社 Electronic control device and manufacturing method
JP2019040942A (en) * 2017-08-23 2019-03-14 沖電気工業株式会社 Electronic apparatus

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