JP2013257286A - Waterproof construction of watthour meter - Google Patents

Waterproof construction of watthour meter Download PDF

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JP2013257286A
JP2013257286A JP2012134899A JP2012134899A JP2013257286A JP 2013257286 A JP2013257286 A JP 2013257286A JP 2012134899 A JP2012134899 A JP 2012134899A JP 2012134899 A JP2012134899 A JP 2012134899A JP 2013257286 A JP2013257286 A JP 2013257286A
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terminal cover
terminal
main body
watt
partition wall
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JP6039254B2 (en
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Takeshi Harada
健史 原田
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Fuji Electric Meter Co Ltd
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Fuji Electric Meter Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide waterproof construction of a watthour meter for making engagement height of a terminal cover lower.SOLUTION: In waterproof construction of a watthour meter in which a terminal cover for protecting a terminal block is combined with a body housing, since the inside of the terminal cover is provided with a partition wall 53 for sectioning the terminal cover to a back side area for accommodating the terminal block and a front side area constituting a drainage channel, and the body housing is provided with a recessed groove 31 for accommodating the upper end of the partition wall, water infiltrated from a part between the body housing and the terminal cover passes through the drainage channel to be drained. Thus, since it becomes unnecessary to consider infiltration of water by a capillary phenomenon, engagement height of the terminal cover can be made lower.

Description

本発明は、電力量計の防水構造に関するもので、特に、端子カバーが本体筐体に組み合わされた防水構造に関する。   The present invention relates to a waterproof structure for a watt hour meter, and more particularly to a waterproof structure in which a terminal cover is combined with a main body casing.

電力量計は、端子ブロックを備えており、端子ブロックは端子カバーに保護される。電力量計は、屋外に設置されることから、端子ブロックの防水が求められ、端子カバーが本体筐体に組み合わされて防水構造を構成する。防水構造は、たとえば、端子カバーの上端部を本体筐体の内側に嵌め込むことにより構成される（たとえば、特許文献１参照）。   The watt-hour meter includes a terminal block, and the terminal block is protected by a terminal cover. Since the watt hour meter is installed outdoors, the terminal block is required to be waterproof, and the terminal cover is combined with the main body casing to form a waterproof structure. The waterproof structure is configured, for example, by fitting the upper end portion of the terminal cover inside the main body housing (see, for example, Patent Document 1).

特開２００９−３６６６２号公報JP 2009-36662 A

ところで、上述した端子カバーの嵌め込み高さは、本体カバーと端子カバーとの間に浸入した水が毛細管現象により端子カバーを乗り越えないように、十分に高く設定してある。   By the way, the fitting height of the terminal cover described above is set sufficiently high so that water that has entered between the main body cover and the terminal cover does not get over the terminal cover due to capillary action.

しかしながら、端子カバーの嵌め込み高さを高くすると、端子カバーが本体筐体に進入する進入量も大きくなり、本体筐体の形状が制限され、本体筐体を成型する金型の制約も多くなる。   However, when the fitting height of the terminal cover is increased, the amount of entry of the terminal cover into the main body casing is increased, the shape of the main body casing is limited, and the restrictions on the mold for molding the main body casing are increased.

本発明は、上記に鑑みてなされたものであって、端子カバーの嵌め込み高さを低くできる電力量計の防水構造を提供することを目的にする。   This invention is made | formed in view of the above, Comprising: It aims at providing the waterproof structure of the watt-hour meter which can make low the fitting height of a terminal cover.

上述した課題を解決し、目的を達成するために、本発明は、端子ブロックを保護する端子カバーが本体筐体と組み合わされた電力量計の防水構造において、前記端子カバーの内側に端子ブロックを収容する奥側領域と排水路を構成する前側領域とに区切る隔壁を設けるとともに、前記本体筐体に前記隔壁の上端部を収容する凹溝を設けたことを特徴とする。   In order to solve the above-described problems and achieve the object, the present invention provides a waterproof structure for a watt-hour meter in which a terminal cover for protecting a terminal block is combined with a main body housing, and the terminal block is disposed inside the terminal cover. A partition wall is provided that is divided into a rear side region to be accommodated and a front side region constituting the drainage channel, and a concave groove for accommodating the upper end portion of the partition wall is provided in the main body housing.

また、本発明は、上記発明において、前記端子カバーの側壁上端内側に上方に突出するリブを設けるとともに、前記本体筐体に前記リブを収容する凹溝を設けたことを特徴とする。   Moreover, the present invention is characterized in that, in the above invention, a rib projecting upward is provided inside the upper end of the side wall of the terminal cover, and a concave groove for accommodating the rib is provided in the main body casing.

また、本発明は、上記発明において、前記端子ブロックに設けた端子台座と取付台座との間に挿入され、前記端子台座と前記取付台座との間を区切るリブを前記隔壁の内側に設けたことを特徴とする。   Further, the present invention is the above invention, wherein a rib that is inserted between the terminal base and the mounting base provided in the terminal block and separates between the terminal base and the mounting base is provided inside the partition wall. It is characterized by.

また、本発明は、上記発明において、前記本体筐体の下面、前記凹溝の前方となる位置に凹部を設けたことを特徴とする。   Moreover, the present invention is characterized in that, in the above-mentioned invention, a concave portion is provided at a position on the lower surface of the main body casing and in front of the concave groove.

本発明にかかる電力量計の防水構造は、端子カバーの内側に端子ブロックを収容する奥側領域と排水路を構成する前側領域とを区切る隔壁を設けるとともに、本体筐体に隔壁の上端部を収容する凹溝を設けたので、本体筐体と端子カバーとの間から浸入した水は排水路を通り排水される。これにより、毛細管現象による水の浸入を考慮しなくてもよくなるので、端子カバーの嵌め込み高さを低くできる。   The waterproof structure of the watt-hour meter according to the present invention is provided with a partition wall that divides the inner area of the terminal cover into the rear area that houses the terminal block and the front area that constitutes the drainage channel, and the upper end of the partition wall is provided in the main body housing. Since the concave groove to be accommodated is provided, the water that has entered from between the main body casing and the terminal cover is drained through the drainage channel. As a result, it is not necessary to consider the intrusion of water due to the capillary phenomenon, so that the fitting height of the terminal cover can be lowered.

図１は、本発明の実施の形態である防水構造を適用した電力量計を示す斜視図である。FIG. 1 is a perspective view showing a watt-hour meter to which a waterproof structure according to an embodiment of the present invention is applied. 図２は、図１に示した電力量計から端子カバーを取り外した状態を示す斜視図である。FIG. 2 is a perspective view showing a state in which the terminal cover is removed from the watt-hour meter shown in FIG. 図３は、図２に示した本体筐体を示す斜視図である。FIG. 3 is a perspective view showing the main body housing shown in FIG. 図４は、図３に示した本体筐体の天地を反転させた状態を示す斜視図である。4 is a perspective view showing a state in which the top and bottom of the main body housing shown in FIG. 3 is inverted. 図５は、図１に示した端子カバーを示す斜視図である。FIG. 5 is a perspective view showing the terminal cover shown in FIG. 図６は、図５に示した端子カバーの裏面側を示す斜視図である。6 is a perspective view showing the back side of the terminal cover shown in FIG. 図７は、図１に示した電力量計の正面図である。FIG. 7 is a front view of the watt-hour meter shown in FIG. 図８は、図７に示したＡ−Ａ断面図である。8 is a cross-sectional view taken along line AA shown in FIG. 図９−１は、図８に示した防水構造の要部拡大図であって、端子カバーを取り付ける前の状態を示す図である。FIG. 9A is an enlarged view of a main part of the waterproof structure shown in FIG. 8 and shows a state before the terminal cover is attached. 図９−２は、図８に示した防水構造の要部拡大図であって、端子カバーを取り付けた後の状態を示す図である。FIG. 9-2 is an enlarged view of a main part of the waterproof structure shown in FIG. 8 and shows a state after the terminal cover is attached.

以下に、本発明にかかる電力量計の防水構造の実施の形態を図面に基づいて詳細に説明する。なお、この実施の形態によりこの発明が限定されるものではない。   Embodiments of a waterproof structure for a watt hour meter according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

図１は、本発明の実施の形態である防水構造を適用した電力量計を示す斜視図であり、図２は、図１に示した電力量計から端子カバーを取り外した状態を示す斜視図である。また、図３は、図２に示した本体筐体を示す斜視図であり、図４は、図３に示した本体筐体の天地を反転させた状態を示す斜視図である。   FIG. 1 is a perspective view showing a watt hour meter to which a waterproof structure according to an embodiment of the present invention is applied, and FIG. 2 is a perspective view showing a state in which a terminal cover is removed from the watt hour meter shown in FIG. It is. 3 is a perspective view showing the main body casing shown in FIG. 2, and FIG. 4 is a perspective view showing a state in which the top and bottom of the main body casing shown in FIG. 3 is inverted.

本発明の実施の形態である防水構造を採用した電力量計１は、電力を計量し積算する計器である。電力量計１は、電力メーターあるいはメーターと称され、電力の売買取引上、重要な役割を担っている。   The watt-hour meter 1 employing the waterproof structure according to the embodiment of the present invention is a meter that measures and integrates electric power. The watt-hour meter 1 is called an electric power meter or meter, and plays an important role in electric power sales transactions.

図１および図２に示すように、本発明の実施の形態である防水構造を適用した電力量計１は、電力量計本体２と、電力量計本体２に取り付けた端子ブロック４とを備えており、端子ブロック４は端子カバー５で保護される。   As shown in FIGS. 1 and 2, a watt hour meter 1 to which a waterproof structure according to an embodiment of the present invention is applied includes a watt hour meter body 2 and a terminal block 4 attached to the watt hour meter body 2. The terminal block 4 is protected by a terminal cover 5.

電力量計本体２は、電力を計量し積算する計量部を構成する部分で、図２〜図４に示すように、本体筐体３を備えている。本体筐体３には、機械部品や電子部品が内蔵され、上述した計量部を構成する。   The watt-hour meter main body 2 is a part constituting a measuring unit that measures and integrates electric power, and includes a main body housing 3 as shown in FIGS. The main body housing 3 incorporates mechanical parts and electronic parts and constitutes the above-described measuring unit.

端子ブロック４は、電線が接続される部分であり、図２に示すように、端子台座４１と取付台座４２とが設けてある。端子台座４１には、電線が接続される端子が設けてあり、電力量計１の設置工事においてこれらの端子に電線が接続される。取付台座４２は、端子カバー５を取り付けるためのもので、端子台座４１の両側に設けてある。取付台座４２は、端子台座４１から独立して設けてあり、その中央にネジ孔４２１が設けてある。   The terminal block 4 is a part to which an electric wire is connected, and as shown in FIG. 2, a terminal base 41 and a mounting base 42 are provided. The terminal pedestal 41 is provided with terminals to which electric wires are connected, and the electric wires are connected to these terminals in the installation work of the watt-hour meter 1. The mounting base 42 is for mounting the terminal cover 5, and is provided on both sides of the terminal base 41. The mounting base 42 is provided independently from the terminal base 41, and a screw hole 421 is provided at the center thereof.

図５は、図１に示した端子カバーを示す斜視図である。図６は、図５に示した端子カバーの裏面側を示す正面図である。図１に示すように、端子カバー５は、端子ブロック４を保護するためのもので、本体筐体３の外形と連続する外形を有している。図５および図６に示すように、端子カバー５は、背面側がくぼんだ凹状に形成してあり、前壁５１と一対の側壁５２とを有している。前壁５１は、端子カバー５の前面を構成する部分であり、図１に示すように、端子ブロック４に端子カバー５を取り付けた場合に、その外表面は本体筐体３の下端前面と面一となる。図５および図６に示すように、側壁５２は、端子カバー５の側面を構成する部分であり、前壁５１の両側に設けてある。図１に示すように、側壁５２は、端子ブロック４に端子カバーを取り付けた場合に、その外表面は本体筐体３の下端側面と面一となる。   FIG. 5 is a perspective view showing the terminal cover shown in FIG. 6 is a front view showing the back side of the terminal cover shown in FIG. As shown in FIG. 1, the terminal cover 5 is for protecting the terminal block 4, and has an outer shape that is continuous with the outer shape of the main body housing 3. As shown in FIG. 5 and FIG. 6, the terminal cover 5 is formed in a concave shape with the back side recessed, and has a front wall 51 and a pair of side walls 52. The front wall 51 is a part constituting the front surface of the terminal cover 5, and when the terminal cover 5 is attached to the terminal block 4 as shown in FIG. Become one. As shown in FIGS. 5 and 6, the side wall 52 is a part constituting the side surface of the terminal cover 5, and is provided on both sides of the front wall 51. As shown in FIG. 1, when the terminal cover is attached to the terminal block 4, the outer surface of the side wall 52 is flush with the lower end side surface of the main body housing 3.

図５および図６に示すように、端子カバー５の内側には、隔壁５３が設けてある。隔壁５３は、前壁５１と一対の側壁５２とに囲まれた領域を、端子ブロック４を収容する奥側領域と排水路を構成する前側領域とに区切るものであり、隔壁５３の奥側領域が端子ブロック４の収容域となり、隔壁５３の前側領域が排水路となる。   As shown in FIGS. 5 and 6, a partition wall 53 is provided inside the terminal cover 5. The partition wall 53 divides a region surrounded by the front wall 51 and the pair of side walls 52 into a rear region that accommodates the terminal block 4 and a front region that forms a drainage channel. Becomes the accommodation area of the terminal block 4, and the front area of the partition wall 53 becomes a drainage channel.

図５に示すように、前壁５１と隔壁５３との間には、複数のリブ５４が設けてある。リブ５４は、前壁５１と隔壁５３との間に排水路を確保するとともに、端子カバー５を補強する。   As shown in FIG. 5, a plurality of ribs 54 are provided between the front wall 51 and the partition wall 53. The rib 54 secures a drainage channel between the front wall 51 and the partition wall 53 and reinforces the terminal cover 5.

側壁５２の上端内側には、リブ５５が設けてある。リブ５５は、側壁５２の上端面から突出しており、隔壁５３の上端部と連なっている。   A rib 55 is provided inside the upper end of the side wall 52. The rib 55 protrudes from the upper end surface of the side wall 52 and continues to the upper end portion of the partition wall 53.

図６に示すように、端子カバー５の内側には、一対の縦リブ５６が設けてある。縦リブ５６は、上下方向に延び、端子ブロック４に端子カバー５を取り付けた場合に、端子ブロック４の端子台座４１と取付台座４２との間に挿入され、端子台座４１と取付台座４２との間を区切ることになる。   As shown in FIG. 6, a pair of vertical ribs 56 are provided inside the terminal cover 5. The vertical rib 56 extends in the vertical direction, and is inserted between the terminal base 41 and the mounting base 42 of the terminal block 4 when the terminal cover 5 is attached to the terminal block 4, and between the terminal base 41 and the mounting base 42. It will be separated.

また、端子カバー５の内側には、横リブ５７が設けてある。横リブ５７は、端子ブロック４の収納域を区切るもので、一方の縦リブ５６の下端と他方の縦リブ５６の下端とを繋ぐように形成してある。   Further, a lateral rib 57 is provided inside the terminal cover 5. The horizontal rib 57 divides the storage area of the terminal block 4 and is formed so as to connect the lower end of one vertical rib 56 and the lower end of the other vertical rib 56.

図４に示すように、本体筐体３の下面（図４において上面）には、凹溝３１が形成してある。凹溝３１は、端子カバー５に設けた隔壁５３の上端が嵌り込む部分であり、端子カバー５に設けたリブ５５が嵌る溝３１１と縦リブ５６の上端５６ａが嵌る溝３１２とが凹溝３１から分岐している。   As shown in FIG. 4, a concave groove 31 is formed on the lower surface (upper surface in FIG. 4) of the main body housing 3. The concave groove 31 is a portion into which the upper end of the partition wall 53 provided in the terminal cover 5 is fitted, and the groove 311 in which the rib 55 provided in the terminal cover 5 is fitted and the groove 312 in which the upper end 56 a of the vertical rib 56 is fitted are concave grooves 31. Branch from.

本体筐体３の下面、凹溝３１の前方となる位置には、凹部３２が設けてある。凹部３２は、本体筐体３と端子カバー５の間から浸入した水が奥に伝わり難くするためのもので、凹部３２を設けたことにより、凹部３２と凹溝３１との間に隔壁３３が形成される。   A concave portion 32 is provided at a position on the lower surface of the main body housing 3 and in front of the concave groove 31. The concave portion 32 is used to make it difficult for water that has entered from between the main body housing 3 and the terminal cover 5 to be transmitted to the back. By providing the concave portion 32, the partition wall 33 is formed between the concave portion 32 and the concave groove 31. It is formed.

図７は、図１に示した電力量計の正面図であり、図８は、図７に示したＡ−Ａ断面図である。また、図９は、図８に示した防水構造の要部拡大図であって、図９−１は、端子カバーを取り付ける前の状態を示す図であり、図９−２は、端子カバーを取り付けた後の状態を示す図である。   7 is a front view of the watt-hour meter shown in FIG. 1, and FIG. 8 is a cross-sectional view taken along the line AA shown in FIG. 9 is an enlarged view of a main part of the waterproof structure shown in FIG. 8, FIG. 9-1 is a view showing a state before the terminal cover is attached, and FIG. 9-2 is a view showing the terminal cover. It is a figure which shows the state after attaching.

図９に示すように、端子ブロック４に端子カバー５を取り付ける場合には、端子カバー５に設けた隔壁５３の上端を凹溝３１に対向させた後、端子カバー５を上に持ち上げる。これにより、隔壁５３の上端部が凹溝３１に収容される。   As shown in FIG. 9, when attaching the terminal cover 5 to the terminal block 4, the upper end of the partition wall 53 provided on the terminal cover 5 is opposed to the concave groove 31, and then the terminal cover 5 is lifted up. Thereby, the upper end portion of the partition wall 53 is accommodated in the concave groove 31.

この状態で、端子カバー５の前壁５１に設けた取付孔５１ａにネジを挿通させ、そのネジを取付台座４２に設けたネジ孔４２１にねじ込むと、端子ブロック４に端子カバー５が取り付けられる。   In this state, when a screw is inserted into the mounting hole 51 a provided in the front wall 51 of the terminal cover 5 and screwed into the screw hole 421 provided in the mounting base 42, the terminal cover 5 is attached to the terminal block 4.

上述した本発明の実施の形態である電力量計１の防水構造は、端子カバー５の内側に端子ブロック４を収容する奥側領域と排水路を構成する前側領域とを区切る隔壁５３を設けるとともに、本体筐体３に隔壁５３の上端部を収容する凹溝３１を設けたので、本体筐体３と端子カバー５との間から浸入した水は、前壁５１と隔壁５３との間に設けられた排水路から排水される。これにより、毛細管現象による水の浸入を考慮しなくてもよくなるので、端子カバー５の嵌め込み高さを低くできる。   The waterproof structure of the watt-hour meter 1 according to the embodiment of the present invention described above is provided with the partition wall 53 that divides the inner side of the terminal cover 5 into the rear region that houses the terminal block 4 and the front region that forms the drainage channel. Since the main housing 3 is provided with the concave groove 31 for accommodating the upper end portion of the partition wall 53, the water that has entered from between the main body housing 3 and the terminal cover 5 is provided between the front wall 51 and the partition wall 53. Drained from the drainage channel. Accordingly, it is not necessary to consider the intrusion of water due to the capillary phenomenon, so that the fitting height of the terminal cover 5 can be reduced.

また、本体筐体３の下面、凹溝３１の前方となる位置に凹部３２を設けたので、本体筐体３と端子カバー５との間から浸入した水は奥に伝わりにくく、防水の完全を図ることができる。また、凹部３２を設けた結果、凹溝３１と凹部３２との間に隔壁３３が形成されるので、本体筐体３と端子カバー５との間から浸入した水が奥に伝わったとしても、隔壁３３から滴下する。   In addition, since the concave portion 32 is provided on the lower surface of the main body housing 3 and in front of the concave groove 31, the water that has entered from between the main body housing 3 and the terminal cover 5 is not easily transmitted to the back, so Can be planned. Further, as a result of providing the recess 32, a partition wall 33 is formed between the recess groove 31 and the recess 32. Therefore, even if water that has entered from between the main body housing 3 and the terminal cover 5 is transmitted to the back, Dropped from the partition wall 33.

また、端子カバー５の側壁上端内側に上方に突出するリブ５５を設けるとともに、本体筐体３の下面にリブ５５を収容する凹溝を設けたので浸水しにくくなる。また、端子カバー５の内側に縦リブ５６を設けたので、端子台座４１と取付台座４２との間が区切られ、本体筐体３と端子カバー５との間から浸入した水が端子台座４１にまで伝わる可能性を小さくできる。   Moreover, since the rib 55 which protrudes upwards is provided inside the upper end of the side wall of the terminal cover 5, and the concave groove which accommodates the rib 55 is provided on the lower surface of the main body housing 3, it becomes difficult to flood. Further, since the vertical ribs 56 are provided inside the terminal cover 5, the terminal pedestal 41 and the mounting pedestal 42 are separated from each other, and water that has entered from between the main body housing 3 and the terminal cover 5 enters the terminal pedestal 41. The possibility of reaching up to can be reduced.

１ 電力量計
２ 電力量計本体
３ 本体筐体
３１ 凹溝
３１１ 溝
３１２ 溝
３２ 凹部
３３ 隔壁
４ 端子ブロック
４１ 端子台座
４２ 取付台座
４２１ ネジ孔
５ 端子カバー
５１ 前壁
５１ａ 取付孔
５２ 側壁
５３ 隔壁
５４ リブ
５５ リブ
５６ 縦リブ
５６ａ 上端
５７ 横リブ DESCRIPTION OF SYMBOLS 1 Electricity meter 2 Electricity meter main body 3 Main body housing 31 Concave groove 311 Groove 312 Groove 32 Concave 33 Bulkhead 4 Terminal block 41 Terminal base 42 Mounting base 421 Screw hole 5 Terminal cover 51 Front wall 51a Mounting hole 52 Side wall 53 Bulkhead 54 Rib 55 Rib 56 Vertical rib 56a Upper end 57 Horizontal rib

Claims (4)

端子ブロックを保護する端子カバーが本体筐体と組み合わされた電力量計の防水構造において、
前記端子カバーの内側に端子ブロックを収容する奥側領域と排水路を構成する前側領域とに区切る隔壁を設けるとともに、前記本体筐体に前記隔壁の上端部を収容する凹溝を設けたことを特徴とする電力量計の防水構造。 In the waterproof structure of the watt hour meter in which the terminal cover that protects the terminal block is combined with the main body housing,
Provided with a partition wall that divides the inner side of the terminal cover into a rear region that accommodates the terminal block and a front region that constitutes the drainage channel, and a concave groove that accommodates the upper end of the partition wall is provided in the main body housing. A waterproof structure for the watt hour meter. 前記端子カバーの側壁上端内側に上方に突出するリブを設けるとともに、前記本体筐体に前記リブを収容する凹溝を設けたことを特徴とする請求項１に記載の電力量計の防水構造。   2. The waterproof structure for a watt-hour meter according to claim 1, wherein a rib projecting upward is provided inside the upper end of the side wall of the terminal cover, and a concave groove for accommodating the rib is provided in the main body casing. 前記端子ブロックに設けた端子台座と取付台座との間に挿入され、前記端子台座と前記取付台座との間を区切るリブを前記隔壁の内側に設けたことを特徴とする請求項１または２に記載の電力量計の防水構造。   The rib inserted between the terminal pedestal provided in the terminal block and the mounting pedestal and separating the terminal pedestal from the mounting pedestal is provided inside the partition wall. Waterproof structure of the watt-hour meter described. 前記本体筐体の下面、前記凹溝の前方となる位置に凹部を設けたことを特徴とする請求項１〜３のいずれか一つに記載の電力量計の防水構造。   The waterproof structure for the watt-hour meter according to any one of claims 1 to 3, wherein a concave portion is provided at a position on a lower surface of the main body casing and in front of the concave groove.
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JP2015222213A (en) * 2014-05-23 2015-12-10 東光東芝メーターシステムズ株式会社 Watt-hour meter
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KR102302974B1 (en) * 2021-06-23 2021-09-15 김명환 Synthetic resin boxes for watt hour meters and devices

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JP2015222213A (en) * 2014-05-23 2015-12-10 東光東芝メーターシステムズ株式会社 Watt-hour meter
JP2018179769A (en) * 2017-04-13 2018-11-15 三菱電機株式会社 Watt-hour meter
JP2018179771A (en) * 2017-04-13 2018-11-15 三菱電機株式会社 Watt-hour meter
CN107966599A (en) * 2017-12-22 2018-04-27 江苏丽阳电子仪表有限公司 A kind of water proofing property mechanical electricity meter
CN107966599B (en) * 2017-12-22 2024-04-30 江苏丽阳电子仪表有限公司 Waterproof mechanical ammeter
KR102302974B1 (en) * 2021-06-23 2021-09-15 김명환 Synthetic resin boxes for watt hour meters and devices

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