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JP7327461B2 - Vibration resistant structure of resin case - Google Patents
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JP7327461B2 - Vibration resistant structure of resin case - Google Patents

Vibration resistant structure of resin case Download PDF

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Publication number
JP7327461B2
JP7327461B2 JP2021207744A JP2021207744A JP7327461B2 JP 7327461 B2 JP7327461 B2 JP 7327461B2 JP 2021207744 A JP2021207744 A JP 2021207744A JP 2021207744 A JP2021207744 A JP 2021207744A JP 7327461 B2 JP7327461 B2 JP 7327461B2
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case
resin case
tip
side plate
vibration
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JP2023092620A (en
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佑磨 田中
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Meidensha Corp
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Meidensha Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/14—Fastening of cover or lid to box
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Casings For Electric Apparatus (AREA)
  • Connection Or Junction Boxes (AREA)

Description

本発明は、例えば電動車両内の電気部品を収容する樹脂ケースの耐振動構造に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-vibration structure for a resin case that accommodates electrical components in, for example, an electric vehicle.

電動車両などの電気装置において、基板等の電気部品を樹脂ケースによって収容する技術として特許文献１が公知となっている。図１（ａ）～（ｅ）は、特許文献１の構成例を示している。 2. Description of the Related Art Japanese Patent Application Laid-Open No. 2002-200000 discloses a technique for housing electric components such as a substrate in a resin case in an electric device such as an electric vehicle. FIGS. 1(a) to 1(e) show configuration examples of Patent Document 1. FIG.

ここでは樹脂ケース１は、樹脂製の上下ケース２，３をスナップフィット５ａ，５ｂによって係合させることで基板４を内部に収容している。この上ケース２にはＬ字状の板金脚６がインサート成形されている。 Here, the resin case 1 accommodates the substrate 4 therein by engaging upper and lower resin cases 2 and 3 with snap fits 5a and 5b. An L-shaped sheet metal leg 6 is insert-molded into the upper case 2 .

板金脚６は、上ケース２の側板２ａに固定された固定部６ａと、固定部６ａの先端から外側水平方向に延設された取付部（平面部）６ｂとを有している。この取付部６ｂにはネジ止め用の貫通孔６ｃが形成されている。この貫通孔６ｃを介して電気装置内の板金部（図示省略）にネジで取り付けられる。 The sheet metal leg 6 has a fixed portion 6a fixed to the side plate 2a of the upper case 2, and a mounting portion (flat portion) 6b extending horizontally outward from the tip of the fixed portion 6a. A through hole 6c for screwing is formed in the mounting portion 6b. Through this through-hole 6c, it is attached to a sheet metal portion (not shown) in the electric device with a screw.

特開２００７－２８２４０１JP 2007-282401

前述のように特許文献１の樹脂ケース１は、電気装置内の板金部（図示省略）にネジで取り付けられるものの、特に電気装置が電動車両の場合には同車両の運転時に板金脚６を介して振動を受ける。 As described above, the resin case 1 of Patent Document 1 is attached to the sheet metal portion (not shown) in the electric device with screws. subject to vibration.

ところが、上下ケース２，３は、スナップフィット５ａ，５ｂの結合で係合しているため、振動を受けたときに上下ケース２，３間にずれが生じやすい。このとき板金脚６に所定の強度をもたせるため、取付部６ｂの高さは上下ケース２，３の接合面より低い位置にあり、図４（ａ）（ｂ）に示すように、固定部６ａの先端内面が下ケース３の側板３ａの外面に対向する。 However, since the upper and lower cases 2 and 3 are engaged by coupling with the snap fits 5a and 5b, the upper and lower cases 2 and 3 are likely to be displaced when subjected to vibration. At this time, in order to give the sheet metal leg 6 a predetermined strength, the mounting portion 6b is positioned lower than the joining surfaces of the upper and lower cases 2 and 3, and as shown in FIGS. faces the outer surface of the side plate 3 a of the lower case 3 .

その結果、図２（ａ）中の矢印Ｐに示すように、振動によって固定部６ａの先端内面が側板３ａの外面に繰り返し当たることとなる。そのため、図２（ｂ）中の矢印Ｑ方向の荷重が側板３ａに加わって、下ケース３に図２（ｃ）中の矢印Ｒに示す反りが生じ、下ケース３に強度低下および破損などが生じるおそれがある。また、電気装置の周囲温度変化に伴う樹脂ケース１の変形が生じた場合も、同様に下ケース３に強度低下および破損を生じるおそれもある。 As a result, as indicated by an arrow P in FIG. 2(a), the inner surface of the tip of the fixed portion 6a repeatedly hits the outer surface of the side plate 3a due to vibration. As a result, a load in the direction of arrow Q in FIG. 2(b) is applied to the side plate 3a, causing the lower case 3 to warp as indicated by arrow R in FIG. 2(c). may occur. Also, when the resin case 1 is deformed due to changes in the ambient temperature of the electric device, the lower case 3 may be similarly weakened and damaged.

本発明は、このような従来の問題を解決するためになされ、反りなどによるケースの強度低下および破損などを防ぐことで電気装置の信頼性・安全性を向上させることを解決課題としている。 The present invention has been made to solve such conventional problems, and aims to improve the reliability and safety of electrical devices by preventing the reduction in strength and damage of the case due to warping.

（１）樹脂製の一方のケースと他方のケースとを係合させることによって電気部品を収容する電気装置における樹脂ケースの耐振動構造であって、
前記各ケースは、
前記電気部品を覆う天井部と、
前記天井部の外周縁に立設された側板と、
を備え、
一方の前記ケースの側板には、前記電気装置内の所定部位とのネジ接合に用いる板金脚がインサート成形され、
前記板金脚は、Ｌ字状に形成され、
一方の前記ケースの側板に固定され、かつ先端が他方の前記ケースの側板まで延設された固定部と、
前記固定部の先端から外側に延設され、かつ前記ネジ用の貫通孔の形成された取付部と、
を備え、
他方の前記ケースの側板と前記固定部の先端との間にクリアランスが設けられていることを特徴としている。 (1) A vibration-resistant structure for a resin case in an electrical device that accommodates electrical components by engaging one resin case with the other resin case,
Each of the above cases
a ceiling covering the electrical components;
a side plate erected on the outer peripheral edge of the ceiling;
with
One of the side plates of the case is insert-molded with a sheet metal leg used for screw connection with a predetermined portion in the electrical device,
The sheet metal leg is formed in an L shape,
a fixing part fixed to the side plate of one of the cases and having a tip extending to the side plate of the other case;
a mounting portion extending outward from the tip of the fixing portion and formed with a through hole for the screw;
with
A clearance is provided between the side plate of the other case and the tip of the fixing portion.

（２）本発明の一態様は、他方の前記ケースの側板が前記固定部の先端に対向する凹状部を備え、
前記凹状部の底壁と前記固定部の先端との間に前記クリアランスが設けられていることを特徴としている。 (2) In one aspect of the present invention, the side plate of the other case has a concave portion facing the tip of the fixing portion,
The clearance is provided between the bottom wall of the concave portion and the tip of the fixing portion.

（３）本発明の他の態様は、一方の前記ケースと他方の前記ケースとをスナップフィットによって係合させることを特徴としている。本発明のさらに他の態様は、前記電気装置が電動車両であることを特徴としている。 (3) Another aspect of the present invention is characterized in that the one case and the other case are engaged by snap-fitting. Yet another aspect of the invention is characterized in that the electrical device is an electric vehicle.

本発明によれば、反りなどによるケースの強度低下および破損などを防ぐことで電気装置の信頼性・安全性を向上させることが可能となる。 According to the present invention, it is possible to improve the reliability and safety of an electric device by preventing the strength reduction and breakage of the case due to warping.

（ａ）は従来ケースの斜視図、（ｂ）は同底面図、（ｃ）は同分解斜視図、（ｄ）は同下ケースの斜視図、（ｅ）は同下ケースの平面図。(a) is a perspective view of the conventional case, (b) is a bottom view of the same, (c) is an exploded perspective view of the same, (d) is a perspective view of the lower case, and (e) is a plan view of the lower case. （ａ）は従来ケースの反りのメカニズムを示す斜視図、（ｂ）は同下ケースの底面図、（ｃ）は同下ケースの側面図、（ｄ）は同下ケースの平面図。(a) is a perspective view showing the warping mechanism of the conventional case, (b) is a bottom view of the same lower case, (c) is a side view of the same lower case, and (d) is a plan view of the same lower case. （ａ）は本発明の実施形態に係る樹脂ケースの斜視図、（ｂ）は同分解斜視図、（ｃ）は同分解斜視図、（ｄ）は同下ケースの斜視図、（ｅ）は同下ケースの平面図。(a) is a perspective view of a resin case according to an embodiment of the present invention, (b) is an exploded perspective view of the same, (c) is an exploded perspective view of the same, (d) is a perspective view of the lower case, and (e) is a The top view of the same lower case. （ａ）（ｃ）は従来ケースと図３の樹脂ケースとの変更点を示すそれぞれの下ケースの平面図、（ｂ）（ｄ）は同底面図。(a) and (c) are plan views of respective lower cases showing differences between the conventional case and the resin case of FIG. 3, and (b) and (d) are bottom views of the same.

以下、本発明の実施形態に係る樹脂ケースの耐振動構造を説明する。この樹脂ケースは、電動車両などの電気装置内に設置され、基板等の電気部品の収納に用いられる。例えばリレーボックス・ヒューズボックスなどの箱体、即ち電気接続箱（エレクトリック・ジャンクション・ブロック）などとして使用することができる。 A vibration resistant structure of a resin case according to an embodiment of the present invention will be described below. This resin case is installed in an electric device such as an electric vehicle, and is used for housing electric parts such as a circuit board. For example, it can be used as a box such as a relay box or a fuse box, that is, an electric connection box (electric junction block).

図３（ａ）～（ｃ）中の１１は、本実施形態の樹脂ケースを示している。この樹脂ケース１１は、図３（ａ）～（ｃ）に示すように、基板１４を樹脂製の上下ケース１２，１３の接合によって内部に収容している。この上下ケース１２，１３の接合には、特許文献１と同様にスナップフィット構造を採用している。 Reference numeral 11 in FIGS. 3(a) to 3(c) indicates the resin case of this embodiment. As shown in FIGS. 3(a) to 3(c), the resin case 11 accommodates the substrate 14 inside by joining upper and lower cases 12 and 13 made of resin. For joining the upper and lower cases 12 and 13, a snap-fit structure is adopted as in Patent Document 1.

上ケース１２は、断面凹状に形成され、基板１４を覆う天井部１２ａと、天井部１２ａの外周縁に立設された四方の側板１２ｂ～１２ｅとを有している。この側板１２ｃには基板１４のコネクタ部２０用の凹部１２ｆが形成されている一方、側板１２ｂ,１２ｄには一対のスナップフィット１５ａが設けられている。 The upper case 12 is formed to have a concave cross section, and has a ceiling portion 12a covering the substrate 14 and four side plates 12b to 12e erected on the outer peripheral edge of the ceiling portion 12a. The side plate 12c is formed with a recess 12f for the connector portion 20 of the substrate 14, while the side plates 12b and 12d are provided with a pair of snap fits 15a.

また、側板１２ｂ，１２ｄは、スナップフィット１５ａ間に板金脚１６がインサート成形されている。この板金脚１６は、Ｌ字状に形成され、側板１２ｂに固定された一端側の固定部１６ａと、固定部１６ａの先端から外側水平方向に延設された他端側の取付部（平面部）１６ｂとを有している。 Further, the side plates 12b and 12d have sheet metal legs 16 insert-molded between snap fits 15a. The sheet metal leg 16 is formed in an L shape, and includes a fixing portion 16a on one end side fixed to the side plate 12b and a mounting portion (flat portion) on the other end side extending horizontally from the tip of the fixing portion 16a. ) 16b.

この固定部１６ａの基端は側板１２ｂ，１２ｄに固定されている一方、先端は下ケース１３まで延設されている。したがって、取付部１６ｂの高さは、上下ケース１２，１３の接合面より低い位置となっている。この取付部１６ｂはネジ止め用の貫通孔１６ｃが貫通形成され、貫通孔１６ｃを介して電気装置内の板金部にネジで取り付けられる。 The base end of this fixing portion 16 a is fixed to the side plates 12 b and 12 d while the tip end thereof extends to the lower case 13 . Therefore, the height of the mounting portion 16b is lower than the joint surfaces of the upper and lower cases 12,13. A through hole 16c for screwing is formed through the mounting portion 16b, and the mounting portion 16b is mounted to a sheet metal portion in the electrical device via the through hole 16c.

下ケース１３は、断面凹状に形成され、図３（ｂ）～（ｅ）に示すように、前記電気部品を覆う天井部１３ａと、天井部１３ａの外周縁に立設された四方の側板１３ｂ～１３ｅとを有し、側板１３ｃにはリブ１３ｆ，１３ｇが立設されている。また、側板１３ｂ，１３ｄには、スナップフィット１５ａの対応位置に一対のスナップフィット１５ｂが設けられている。 The lower case 13 is formed to have a concave cross-section, and as shown in FIGS. 13e, and ribs 13f and 13g are erected on the side plate 13c. A pair of snap fits 15b are provided on the side plates 13b and 13d at positions corresponding to the snap fits 15a.

さらに側板１３ｂ，１３ｄは、スナップフィット１５ｂ間に凹状部１７が形成されている。この凹状部１７は、側板１３ｂ，１３ｄから内方向に折曲形成された左右の側壁１７ｂと、両側壁１７ｂの先端間の底壁１７ａとを有している。この底壁１７ａは、固定部１６ａの先端と対向配置され、図４（ｃ）中の矢印Ｓに示すように、側板１３ｂ，１３ｄから「１ｍｍ」ほど窪んで配置されている。 Furthermore, the side plates 13b and 13d are formed with a concave portion 17 between the snap fits 15b. The concave portion 17 has left and right side walls 17b bent inward from the side plates 13b and 13d, and a bottom wall 17a between the tips of the side walls 17b. The bottom wall 17a faces the tip of the fixing portion 16a, and is recessed about 1 mm from the side plates 13b and 13d as indicated by an arrow S in FIG. 4(c).

したがって、上下ケース１２，１３をスナップフィット１５ａ，１５ｂによって係合させて接合した場合、図４（ｄ）に示すように、固定部１６ａの先端と底壁１７ａとの間に「１ｍｍ」ほどのクリアランス（隙間）１９が生じる。 Therefore, when the upper and lower cases 12 and 13 are engaged and joined by the snap-fits 15a and 15b, as shown in FIG. A clearance (gap) 19 is created.

このような樹脂ケース１の耐振動構造によれば、固定部１６ａの先端内面が底壁１７ａの外面に対向するものの、前記矢印Ｐの装置振動時に板金脚１６の移動距離が「１ｍｍ未満」であれば、固定部１６ａは底壁１７ａに当たらなくなる。 According to such a vibration-resistant structure of the resin case 1, although the inner surface of the tip end of the fixing portion 16a faces the outer surface of the bottom wall 17a, the moving distance of the sheet metal leg 16 is "less than 1 mm" when the apparatus vibrates as indicated by the arrow P. If there is, the fixing portion 16a will not come into contact with the bottom wall 17a.

その結果、特許文献１のように電気装置の振動時に板金脚１６の固定部１６ａが下ケース１３に繰り返し当たって前記矢印Ｑの荷重が加わることがなく、スナップフィット構造における下ケース１２の前記矢印Ｒ方向の反りや上下ケース１２，１３のズレなどが防止される。したがって、下ケース１３の強度低下・破損などによる基板１４の露出・短絡などが防止でき、この点で電気装置の信頼性・安全性を向上させることが可能となる。 As a result, the fixed portion 16a of the sheet metal leg 16 does not repeatedly hit the lower case 13 when the electric device vibrates, and the load indicated by the arrow Q is not applied to the lower case 12 in the snap-fit structure. Warp in the R direction and displacement of the upper and lower cases 12 and 13 are prevented. Therefore, it is possible to prevent the substrate 14 from being exposed or short-circuited due to a decrease in strength or breakage of the lower case 13. In this respect, the reliability and safety of the electric device can be improved.

なお、本発明は、上記実施形態に限定されるものではなく、各請求項に記載された範囲内で変形して実施することができる。例えば下ケース１３の側板１３ｂ，１３ｄに板金脚１６が設けられた構成では、上ケース１２の側板１２ｄ，１２ｄに凹状部１７を形成すればよい。 It should be noted that the present invention is not limited to the above-described embodiments, and can be modified and implemented within the scope described in each claim. For example, in a structure in which the side plates 13b and 13d of the lower case 13 are provided with the sheet metal legs 16, the side plates 12d and 12d of the upper case 12 may be provided with the concave portions 17. FIG.

また、クリアランス１９は「１ｍｍ」の距離に限定されず、装置振動の大きさに応じて底壁１７ａの位置を成形時に調整することで適宜に変更することが可能である。 Further, the clearance 19 is not limited to a distance of "1 mm", and can be changed as appropriate by adjusting the position of the bottom wall 17a during molding according to the magnitude of device vibration.

１１…樹脂ケース
１２…上ケース
１２ａ，１３ａ…天井部
１２ｂ～１２ｅ，１３ａ～１３ｅ…側板
１２ｆ…凹部
１３…下ケース
１４…基板
１５ａ，１５ｂ…スナップフィット
１６…板金脚
１６ａ…固定部
１６ｂ…取付部
１６ｃ…貫通孔
１７…凹状部
１７ａ…底壁
１７ｂ…側壁
１９…クリアランス DESCRIPTION OF SYMBOLS 11... Resin case 12... Upper case 12a, 13a... Ceiling part 12b-12e, 13a-13e... Side plate 12f... Recessed part 13... Lower case 14... Substrate 15a, 15b... Snap fit 16... Sheet metal leg 16a... Fixed part 16b... Mounting Part 16c... Through hole 17... Concave portion 17a... Bottom wall 17b... Side wall 19... Clearance

Claims (3)

電気装置において、樹脂製の一方のケースと他方のケースとを係合させることによって電気部品を収容する樹脂ケースの耐振動構造であって、
前記各ケースは、
前記電気部品を覆う天井部又は底板部と、
前記天井部又は底板部の外周縁に立設された側板と、
を備え、
一方の前記ケースの側板には、前記電気装置内の所定部位とのネジ接合に用いる板金脚がインサート成形され、
前記板金脚は、Ｌ字状に形成され、
一方の前記ケースの側板に固定され、かつ先端が他方の前記ケースの側板まで延設された固定部と、
前記固定部の先端から外側に延設され、かつ前記ネジ用の貫通孔の形成された他端部側の取付部と、
を備え、
他方の前記ケースの側板と前記固定部の先端との間にクリアランスが設けられ、
他方の前記ケースの側板は、前記固定部の先端に対向する凹状部を備え、
前記凹状部の底壁と前記固定部の先端との間に前記クリアランスが設けられている
ことを特徴とする樹脂ケースの耐振動構造。 In an electrical device, a vibration-resistant structure of a resin case that accommodates electrical components by engaging one resin case with the other resin case,
Each of the above cases
a ceiling portion or a bottom plate portion covering the electrical components;
a side plate erected on an outer peripheral edge of the ceiling portion or the bottom plate portion ;
with
One of the side plates of the case is insert-molded with a sheet metal leg used for screw connection with a predetermined portion in the electrical device,
The sheet metal leg is formed in an L shape,
a fixing part fixed to the side plate of one of the cases and having a tip extending to the side plate of the other case;
a mounting portion on the other end side extending outward from the tip of the fixing portion and formed with a through hole for the screw;
with
A clearance is provided between the side plate of the other case and the tip of the fixing portion,
the other side plate of the case has a concave portion facing the tip of the fixing portion,
The clearance is provided between the bottom wall of the concave portion and the tip of the fixing portion.
A vibration resistant structure of a resin case characterized by: 一方の前記ケースと他方の前記ケースとをスナップフィットによって係合させる
ことを特徴とする請求項１記載の樹脂ケースの耐振構造。 2. The vibration-proof structure of the resin case according to claim 1 , wherein the case on one side and the case on the other side are engaged with each other by snap-fitting. 前記電気装置は、電動車両である
ことを特徴とする請求項１または２記載の樹脂ケースの耐振構造。
 3. The vibration-resistant structure of the resin case according to claim 1, wherein the electric device is an electric vehicle.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008279847A (en) 2007-05-09 2008-11-20 Toyota Industries Corp Electronic equipment
WO2010150510A1 (en) 2009-06-26 2010-12-29 日本特殊陶業株式会社 Circuit board containing unit
JP2012165619A (en) 2011-02-09 2012-08-30 Auto Network Gijutsu Kenkyusho:Kk Integrated structure of electric connection box and electrical unit
JP2018032675A (en) 2016-08-23 2018-03-01 沖電気工業株式会社 Electronic equipment casing
JP2020039192A (en) 2018-09-03 2020-03-12 矢崎総業株式会社 Electric connection box and wire harness

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3446483B2 (en) * 1996-07-03 2003-09-16 住友電装株式会社 Electrical junction box

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008279847A (en) 2007-05-09 2008-11-20 Toyota Industries Corp Electronic equipment
WO2010150510A1 (en) 2009-06-26 2010-12-29 日本特殊陶業株式会社 Circuit board containing unit
JP2012165619A (en) 2011-02-09 2012-08-30 Auto Network Gijutsu Kenkyusho:Kk Integrated structure of electric connection box and electrical unit
JP2018032675A (en) 2016-08-23 2018-03-01 沖電気工業株式会社 Electronic equipment casing
JP2020039192A (en) 2018-09-03 2020-03-12 矢崎総業株式会社 Electric connection box and wire harness

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