JP6392426B1 - Electricity meter - Google Patents

Electricity meter Download PDF

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JP6392426B1
JP6392426B1 JP2017169827A JP2017169827A JP6392426B1 JP 6392426 B1 JP6392426 B1 JP 6392426B1 JP 2017169827 A JP2017169827 A JP 2017169827A JP 2017169827 A JP2017169827 A JP 2017169827A JP 6392426 B1 JP6392426 B1 JP 6392426B1
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cover
terminal
display surface
hour meter
watt
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JP2019045358A (en
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正敏 小峯
正敏 小峯
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Osaka Denki Co Ltd
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Abstract

【課題】 変流器内蔵据置端子に接続された状態であっても端子カバーを取り外すことができ、端子カバーをカバーから取り外す際に、その都度、電力量計の端子部と棒端子との接続を解く手間の要らない電力量計を提供する。【解決手段】 電力量計１１は、端子カバー１４の塞辺１４ａに形成された張り出し部１４ｂの背面側に突出部１４ｃが備えられ、張り出し部１４ｂに嵌合する切り欠き部１３ｂがカバー１３の開放辺１３ａに形成される。このため、端子カバー１４のカバー１３への装着時に、カバー１３の表示面の鉛直方向において、突出部１４ｃが表示面と重なる長さＬ４は短くなる。したがって、端子カバー１４をカバー１３から取り外す際、表示面の水平方向において端子カバー１４をカバー１３から離す向きＡに移動させる距離Ｌ２が短くても、表示面の鉛直方向Ｂにおいて突出部１４ｃが表示面と重ならなくなる。【選択図】 図６PROBLEM TO BE SOLVED: To remove a terminal cover even when it is connected to a stationary terminal with a built-in current transformer, and to connect the terminal part of the watt hour meter to the bar terminal each time the terminal cover is removed from the cover. Provide a watt-hour meter that does not require you to solve the problem. SOLUTION: The watt hour meter 11 is provided with a protruding portion 14c on the back side of an overhanging portion 14b formed on the closed side 14a of the terminal cover 14, and a cutout portion 13b fitted into the overhanging portion 14b is provided on the cover 13. It is formed on the open side 13a. For this reason, when the terminal cover 14 is attached to the cover 13, the length L <b> 4 where the protruding portion 14 c overlaps the display surface is shortened in the vertical direction of the display surface of the cover 13. Therefore, when the terminal cover 14 is removed from the cover 13, the protrusion 14 c is displayed in the vertical direction B of the display surface even if the distance L2 for moving the terminal cover 14 in the direction A away from the cover 13 in the horizontal direction of the display surface is short. It will not overlap with the surface. [Selection] Figure 6

Description

本発明は、カバーに端子カバーが装着されたことを検出する検出スイッチを備える電力量計に関するものである。   The present invention relates to a watt-hour meter including a detection switch that detects that a terminal cover is attached to a cover.

従来、この種の電力量計としては、例えば、特許文献１に開示されたものがある。この電力量計では、ケース内にスイッチ部が設けられ、端子カバーには、端子カバーがケースに取り付けられたときにスイッチ部を押す、バネ性を有するスイッチプッシュ部が形成されている。スイッチプッシュ部は、端子カバーのコの字状段部の内側に段部の長手方向に沿って形成され、先端には突起部が形成されている。段部は、端子カバーをケースに取り付けたときにケースのカバー接触部に当接する。このとき、スイッチプッシュ部の先端の突起部がスイッチ部に当接し、スイッチ部をオンさせる。   Conventionally, as this kind of watt-hour meter, there is one disclosed in Patent Document 1, for example. In this watt-hour meter, a switch part is provided in the case, and a switch push part having a spring property is formed on the terminal cover, which pushes the switch part when the terminal cover is attached to the case. The switch push part is formed inside the U-shaped step part of the terminal cover along the longitudinal direction of the step part, and a protrusion is formed at the tip. The step portion contacts the cover contact portion of the case when the terminal cover is attached to the case. At this time, the protrusion at the tip of the switch push part comes into contact with the switch part and turns on the switch part.

このような特許文献１に開示された電力量計では、スイッチ部がケースの内方の奥まった位置に設けられていると、スイッチプッシュ部の先端の突起部がスイッチ部に届かず、スイッチ部を操作することができない。このため、図１（ａ）に示す電力量計１の側面図のように、端子カバー２の縁部からスイッチプッシュ部３を突出させて形成することで、スイッチプッシュ部３の先端をケース４内のスイッチ部５に当接させて、スイッチ部５を操作することができる。   In such a watt-hour meter disclosed in Patent Document 1, when the switch part is provided at a position deep inside the case, the protrusion at the tip of the switch push part does not reach the switch part, and the switch part Can not be operated. For this reason, as shown in the side view of the watt-hour meter 1 shown in FIG. The switch unit 5 can be operated by contacting the switch unit 5.

特開２０１５−２１５２４０号公報JP 2015-215240 A 特開２０１５−１８４２２７号公報JP-A-2015-184227

しかし、上記のように構成した電力量計１では、図１（ｂ）に示す、特許文献２に開示されるような変流器内蔵据置端子６を棒端子７で電力量計１の端子部に接続した状態では、端子カバー２をケース４から取り外すことができない。つまり、据置端子６およびケース４間の距離Ｌ１が限られ、端子カバー２を移動させることができる距離Ｌ２がスイッチプッシュ部３の突出長さＬ３よりも短い。したがって、図１（ｃ）に示すように端子カバー２を据置端子６の側に矢示する向きＡへ移動させて、端子カバー２を鉛直方向Ｂに持ち上げると、スイッチプッシュ部３がケース４の前面壁に当たってしまい、端子カバー２をケース４から取り外すことができない。このため、所定比に変流した負荷電流を据置端子６によって電力量計１に供給する場合、端子カバー２をケース４から取り外すには、その都度、電力量計１の端子部と棒端子７との接続を解く必要があり、手間を要した。   However, in the watt hour meter 1 configured as described above, the current transformer built-in stationary terminal 6 as disclosed in Patent Document 2 shown in FIG. The terminal cover 2 cannot be removed from the case 4 in a state where it is connected to. That is, the distance L1 between the stationary terminal 6 and the case 4 is limited, and the distance L2 at which the terminal cover 2 can be moved is shorter than the protruding length L3 of the switch push portion 3. Therefore, when the terminal cover 2 is moved in the direction A indicated by the arrow toward the stationary terminal 6 as shown in FIG. The terminal cover 2 cannot be removed from the case 4 because it hits the front wall. For this reason, when the load current transformed to a predetermined ratio is supplied to the watt hour meter 1 by the stationary terminal 6, each time the terminal cover 2 is removed from the case 4, the terminal portion of the watt hour meter 1 and the bar terminal 7 are removed. It was necessary to break the connection with, and it took time and effort.

本発明はこのような課題を解決するためになされたもので、
使用電力量を表示させる表示窓を表示面に有する、端子部を開放して内部部品を覆うカバーと、表示面の開放辺に塞辺が合わされて前面が表示面に連なり、カバーによって覆われない端子部を覆う端子カバーと、表示面の開放辺に前面の塞辺が合わされてカバーに端子カバーが装着されたことを検出する、カバーに覆われる検出スイッチとを備える電力量計において、
カバーが、検出スイッチを覆う位置に向かって切り欠かれた切り欠き部が開放辺に形成され、
検出スイッチの操作部が切り欠き部に臨んで設けられ、
端子カバーが、カバーへの装着時に切り欠き部に嵌合して前面が表示面に連なる、塞辺に形成された張り出し部と、操作部の設置高さに及ぶ厚さを有して張り出し部の背面側に設けられ、カバーへの装着時に操作部に及ぶ突出長さを有する突出部とを備える
ことを特徴とする。 The present invention has been made to solve such problems,
A cover that has a display window on the display surface that displays the amount of power used, covers the internal parts by opening the terminal part, and the closed side is aligned with the open side of the display surface, the front is connected to the display surface, and is not covered by the cover In a watt hour meter comprising: a terminal cover that covers the terminal portion; and a detection switch that is covered by the cover that detects that the front cover is fitted to the open side of the display surface and the terminal cover is attached to the cover.
The cover is formed on the open side with a notch cut out toward the position covering the detection switch,
The operation part of the detection switch is provided facing the notch,
When the terminal cover is attached to the cover, it fits into the notch and the front part is connected to the display surface. The overhang part is formed on the closed side, and the overhang part has a thickness up to the installation height of the operation part. And a projecting portion having a projecting length extending to the operating portion when mounted on the cover.

本構成によれば、端子カバーの塞辺に形成された張り出し部の背面側に突出部が備えられ、張り出し部に嵌合する切り欠き部が塞辺が合わさるカバーの開放辺に形成されるため、端子カバーのカバーへの装着時に表示面の鉛直方向において突出部が表示面と重なる長さは短くなる。したがって、端子カバーをカバーから取り外す際、表示面の水平方向において端子カバーをカバーから離す向きに移動させる距離が短くても、表示面の鉛直方向において突出部が表示面と重ならなくなる。このため、電力量計が変流器内蔵据置端子に接続された状態で、据置端子とカバーとの間の距離が限られた場合であっても、端子カバーを表示面の水平方向においてカバーから離す向きに短い距離だけ移動させることで、表示面の鉛直方向にカバーから端子カバーを取り去ることが可能となる。この結果、電力量計が変流器内蔵据置端子に接続された状態であっても端子カバーを取り外すことができ、端子カバーをカバーから取り外す際に、その都度、電力量計の端子部と棒端子との接続を解く手間は不要となる。   According to this configuration, the protruding portion is provided on the back side of the overhang portion formed on the closed side of the terminal cover, and the cutout portion that fits into the overhang portion is formed on the open side of the cover where the closed side meets. When the terminal cover is attached to the cover, the length in which the protruding portion overlaps the display surface in the vertical direction of the display surface is shortened. Therefore, when the terminal cover is removed from the cover, even if the distance to move the terminal cover away from the cover in the horizontal direction of the display surface is short, the protruding portion does not overlap the display surface in the vertical direction of the display surface. For this reason, even when the watt-hour meter is connected to the stationary terminal with a built-in current transformer and the distance between the stationary terminal and the cover is limited, the terminal cover should be removed from the cover in the horizontal direction of the display surface. It is possible to remove the terminal cover from the cover in the vertical direction of the display surface by moving the cover away from the cover by a short distance. As a result, the terminal cover can be removed even when the watt-hour meter is connected to the stationary terminal with a built-in current transformer, and each time the terminal cover is removed from the cover, the terminal and rod of the watt-hour meter are removed. There is no need to disconnect the terminal.

また、本発明は、端子カバーが、突出部の突出長さが張り出し部の張り出し長さよりも長く形成されることを特徴とする。   Further, the present invention is characterized in that the terminal cover is formed such that the protruding length of the protruding portion is longer than the protruding length of the protruding portion.

本構成によれば、突出部の突出長さを操作部に及ぶ長さに保ちながら、表示面に張り出し部が張り出す長さを抑制することができる。このため、カバーの表示面における、使用電力量を表示させる表示窓等の配置に張り出し部が及ぼす影響を少なくすることができる。   According to this configuration, it is possible to suppress the length of the projecting portion projecting on the display surface while maintaining the projecting length of the projecting portion to reach the operation portion. For this reason, the influence which an overhang | projection part has on the arrangement | positioning of the display window etc. which display the used electric energy on the display surface of a cover can be decreased.

また、本発明は、端子カバーが、張り出し部および突出部と一体に成形されることを特徴とする。   Further, the present invention is characterized in that the terminal cover is formed integrally with the protruding portion and the protruding portion.

本構成によれば、張り出し部および突出部を端子カバーの別部品として設ける場合に比較して、電力量計の製造コストを低減することができる。   According to this configuration, the manufacturing cost of the watt hour meter can be reduced as compared with the case where the overhanging portion and the protruding portion are provided as separate parts of the terminal cover.

本発明によれば、変流器内蔵据置端子に接続された状態であっても端子カバーを取り外すことができ、端子カバーをカバーから取り外す際に、その都度、電力量計の端子部と棒端子との接続を解く手間の要らない電力量計を提供することができる。   According to the present invention, the terminal cover can be removed even when connected to the stationary terminal with a built-in current transformer, and each time the terminal cover is removed from the cover, the terminal portion and the bar terminal of the watt-hour meter It is possible to provide a watt-hour meter that does not require time and effort to disconnect the connection.

（ａ）は、従来の電力量計の概略の側面図、（ｂ）は、変流器内蔵据置端子に接続された従来の電力量計の概略の側面図、（ｃ）は、変流器内蔵据置端子に接続された従来の電力量計の端子カバーが水平方向にスライドした状態の概略の側面図である。(A) is a schematic side view of a conventional watt hour meter, (b) is a schematic side view of a conventional watt hour meter connected to a stationary terminal with a built-in current transformer, and (c) is a current transformer. It is a schematic side view of the state where the terminal cover of the conventional watt-hour meter connected to the built-in stationary terminal slides in the horizontal direction. （ａ）、（ｂ）、（ｃ）は、本発明の一実施の形態による電力量計の平面図、側面図、正面図である。(A), (b), (c) is the top view, side view, and front view of the watt-hour meter by one embodiment of this invention. （ａ）、（ｂ）、（ｃ）は、端子カバーを取り外した状態における一実施の形態による電力量計の平面図、側面図、正面図である。(A), (b), (c) is the top view, side view, and front view of the watt-hour meter by one Embodiment in the state which removed the terminal cover. （ａ）、（ｂ）、（ｃ）は、一実施の形態による電力量計を構成する端子カバーの平面図、側面図、正面図である。(A), (b), (c) is the top view of the terminal cover which comprises the watt-hour meter by one Embodiment, a side view, and a front view. （ａ）は、一実施の形態による電力量計が内蔵する検出スイッチのオン状態を示す部分断面図、（ｂ）はオフ状態を示す部分断面図である。(A) is a fragmentary sectional view which shows the ON state of the detection switch which the watt-hour meter by one Embodiment incorporates, (b) is a fragmentary sectional view which shows an OFF state. （ａ）は、一実施の形態による電力量計の概略の側面図、（ｂ）は、変流器内蔵据置端子に接続された一実施の形態による電力量計の端子カバーが水平方向にスライドした状態の概略の側面図、（ｃ）は、端子カバーが鉛直方向に取り外された状態の概略の側面図である。(A) is a schematic side view of a watt-hour meter according to an embodiment, and (b) is a terminal cover of the watt-hour meter according to the embodiment connected to a stationary terminal with a built-in current transformer that slides horizontally. (C) is a schematic side view of the terminal cover removed in the vertical direction.

次に、本発明による電力量計を実施するための形態について説明する。   Next, the form for implementing the watt-hour meter by this invention is demonstrated.

図２（ａ）は、本発明の一実施の形態による電力量計１１の平面図、同図（ｂ）は側面図、同図（ｃ）は正面図である。   2A is a plan view of the watt-hour meter 11 according to the embodiment of the present invention, FIG. 2B is a side view, and FIG. 2C is a front view.

電力量計１１は、樹脂製のベース１２に樹脂製のカバー１３が被されて構成されている。ベース１２の端子部は樹脂製の端子カバー１４によって覆われている。カバー１３は封印ねじ１６ａにより、端子カバー１４は封印ねじ１６ｂ、１６ｂにより、ベース１２に封印される。カバー１３の前面の表示面には透明な表示窓１５が形成されており、表示窓１５には使用電力量が表示される。端子カバー１４は、その前面の塞辺１４ａがカバー１３の表示面の開放辺１３ａに合わされて、前面が表示面に連なってカバー１３に装着されて、ベース１２に取り付けられている。   The watt-hour meter 11 is configured by covering a resin base 12 with a resin cover 13. The terminal portion of the base 12 is covered with a resin terminal cover 14. The cover 13 is sealed to the base 12 by the sealing screw 16a, and the terminal cover 14 is sealed by the sealing screws 16b and 16b. A transparent display window 15 is formed on the front display surface of the cover 13, and the power consumption is displayed on the display window 15. The terminal cover 14 is attached to the base 12 so that the closed side 14 a of the front surface thereof is aligned with the open side 13 a of the display surface of the cover 13, the front surface is connected to the display surface 13 and is attached to the cover 13.

図３（ａ）は、端子カバー１４を取り外した状態における電力量計１１の平面図、同図（ｂ）は側面図、同図（ｃ）は正面図である。なお、同図において図２と同一部分には同一符号を付してその説明は省略する。また、ベース１２に取り付けられる内部部品は同図では省略している。ベース１２には複数の端子金具１７が並べられて端子部が構成されている。各端子金具１７には、配電線や、変流器内蔵据置端子の棒端子が接続される。電力量計１１は、これら配電線や棒端子から供給される電圧と電流とに基づいて、負荷の使用電力量を計量する。この計量演算は回路基板１８に実装された電子回路において行われ、計量結果が液晶表示装置等に表示されて、表示窓１５を介して視認される。   3A is a plan view of the watt hour meter 11 with the terminal cover 14 removed, FIG. 3B is a side view, and FIG. 3C is a front view. In the figure, the same parts as those in FIG. Further, internal components attached to the base 12 are omitted in the figure. A plurality of terminal fittings 17 are arranged on the base 12 to constitute a terminal portion. Each terminal fitting 17 is connected to a distribution line or a bar terminal of a stationary terminal with a built-in current transformer. The watt-hour meter 11 measures the power consumption of the load based on the voltage and current supplied from these distribution lines and rod terminals. This measurement calculation is performed in an electronic circuit mounted on the circuit board 18, and the measurement result is displayed on a liquid crystal display device or the like and visually recognized through the display window 15.

カバー１３は同図に示すように端子部を開放して内部部品を覆い、端子カバー１４は図２に示すようにカバー１３によって覆われない端子部を覆う。電力量計１１には、図３（ａ）に示すように検出スイッチ１９がカバー１３に覆われて内蔵されている。検出スイッチ１９は、回路基板１８に実装されており、カバー１３に端子カバー１４が装着されたことを検出して、検出結果を回路基板１８に形成された電子回路へ出力する。   As shown in FIG. 2, the cover 13 opens the terminal portion to cover the internal parts, and the terminal cover 14 covers the terminal portion not covered by the cover 13 as shown in FIG. As shown in FIG. 3A, the watt hour meter 11 includes a detection switch 19 covered with a cover 13. The detection switch 19 is mounted on the circuit board 18, detects that the terminal cover 14 is attached to the cover 13, and outputs the detection result to an electronic circuit formed on the circuit board 18.

カバー１３の表示面の開放辺１３ａには、検出スイッチ１９を覆う位置に向かって台形形状に切り欠かれた切り欠き部１３ｂが形成されている。検出スイッチ１９の後述する操作部１９ａ（図５参照）は、この切り欠き部１３ｂに臨んで設けられている。   On the open side 13 a of the display surface of the cover 13, a notch 13 b that is notched in a trapezoidal shape toward a position that covers the detection switch 19 is formed. An operation unit 19a (see FIG. 5), which will be described later, of the detection switch 19 is provided facing the notch 13b.

図４（ａ）は端子カバー１４の平面図、同図（ｂ）は側面図、同図（ｃ）は正面図である。なお、同図において図２と同一部分には同一符号を付してその説明は省略する。   4A is a plan view of the terminal cover 14, FIG. 4B is a side view, and FIG. 4C is a front view. In the figure, the same parts as those in FIG.

端子カバー１４には張り出し部１４ｂと突出部１４ｃとが一体に成形されている。張り出し部１４ｂは、塞辺１４ａに台形形状に張り出して形成されており、端子カバー１４のカバー１３への装着時に切り欠き部１３ｂに嵌合して、端子カバー１４の前面がカバー１３の表示面に連なる。突出部１４ｃは、検出スイッチ１９の操作部１９ａの設置高さに及ぶ厚さＴを有して、張り出し部１４ｂの背面側に設けられ、端子カバー１４のカバー１３への装着時に操作部１９ａに及ぶ突出長さＬａを有する。本実施形態では、突出部１４ｃの突出長さＬａは、張り出し部１４ｂの張り出し長さＬｂよりも長く形成されている。   The terminal cover 14 is integrally formed with an overhanging portion 14b and a protruding portion 14c. The overhanging portion 14 b is formed so as to protrude in a trapezoidal shape on the closed side 14 a, and fits into the cutout portion 13 b when the terminal cover 14 is attached to the cover 13, so that the front surface of the terminal cover 14 is the display surface of the cover 13. It continues to. The protruding portion 14c has a thickness T that extends to the installation height of the operating portion 19a of the detection switch 19, and is provided on the back side of the overhanging portion 14b. The protruding portion 14c is provided on the operating portion 19a when the terminal cover 14 is attached to the cover 13. It has a protruding length La that extends. In the present embodiment, the protruding length La of the protruding portion 14c is formed longer than the protruding length Lb of the protruding portion 14b.

図５（ａ）は、端子カバー１４の塞辺１４ａがカバー１３の開放辺１３ａに合わされて端子カバー１４がカバー１３に装着され、検出スイッチ１９の操作部１９ａが突出部１４ｃに押されて検出スイッチ１９がオンした状態を示す部分断面図である。同図（ｂ）は、端子カバー１４がカバー１３に装着される前における、検出スイッチ１９の操作部１９ａがオフの状態を示す部分断面図である。なお、図５において図２〜図４と同一部分には同一符号を付してその説明は省略する。   In FIG. 5A, the closed side 14a of the terminal cover 14 is aligned with the open side 13a of the cover 13, the terminal cover 14 is mounted on the cover 13, and the operation portion 19a of the detection switch 19 is pushed by the protruding portion 14c. It is a fragmentary sectional view showing the state where switch 19 was turned on. FIG. 2B is a partial cross-sectional view showing a state in which the operation portion 19 a of the detection switch 19 is turned off before the terminal cover 14 is attached to the cover 13. 5 that are the same as those shown in FIGS. 2 to 4 are marked with the same symbols and descriptions of them will be omitted.

このような本実施形態による電力量計１１では、端子カバー１４の塞辺１４ａに形成された張り出し部１４ｂの背面側に突出部１４ｃが備えられ、張り出し部１４ｂに嵌合する切り欠き部１３ｂが、塞辺１４ａが合わさるカバー１３の開放辺１３ａに形成されている。このため、図６（ａ）の電力量計１１の側面図に示すように、端子カバー１４のカバー１３への装着時に、カバー１３の表示面の鉛直方向において、突出部１４ｃが表示面と重なる長さＬ４は、図１に示すスイッチプッシュ部３が表示面と重なる長さＬ３よりも短くなる。なお、図６において図２〜図４と同一部分には同一符号を付してその説明は省略する。したがって、端子カバー１４をカバー１３から取り外す際、図６（ｂ）に示す変流器内蔵据置端子６に接続された電力量計１１の側面図のように、表示面の水平方向において端子カバー１４をカバー１３から離す矢示する向きＡに移動させる距離Ｌ２が短くても、距離Ｌ２が長さＬ４よりも大きければ、表示面の鉛直方向において突出部１４ｃが表示面と重ならなくなる。   In the watt-hour meter 11 according to the present embodiment, the protruding portion 14c is provided on the back side of the protruding portion 14b formed on the closed side 14a of the terminal cover 14, and the notch portion 13b that fits the protruding portion 14b is provided. The closed side 14a is formed on the open side 13a of the cover 13. For this reason, as shown in the side view of the watt hour meter 11 in FIG. 6A, when the terminal cover 14 is attached to the cover 13, the protrusion 14c overlaps the display surface in the vertical direction of the display surface of the cover 13. The length L4 is shorter than the length L3 where the switch push part 3 shown in FIG. 1 overlaps the display surface. In FIG. 6, the same parts as those in FIGS. Therefore, when the terminal cover 14 is removed from the cover 13, as shown in a side view of the watt hour meter 11 connected to the stationary terminal 6 with built-in current transformer shown in FIG. Even if the distance L2 to be moved in the direction A indicated by the arrow away from the cover 13 is short, if the distance L2 is greater than the length L4, the protrusion 14c does not overlap the display surface in the vertical direction of the display surface.

このため、電力量計１１が変流器内蔵据置端子６に接続された状態で、据置端子６とカバー１３との間の距離Ｌ１が限られた場合であっても、端子カバー１４を表示面の水平方向においてカバー１３から離す向きＡに短い距離Ｌ２だけ移動させることで、図６（ｃ）の電力量計１１の側面図に示すように、表示面の鉛直方向Ｂにカバー１３から端子カバー１４を取り去ることが可能となる。この結果、電力量計１１が変流器内蔵据置端子６に接続された状態であっても端子カバー１４を取り外すことができ、端子カバー１４をカバー１３から取り外す際に、その都度、電力量計１１の端子部と棒端子７との接続を解く手間は不要となる。   Therefore, even when the distance L1 between the stationary terminal 6 and the cover 13 is limited in a state where the watt hour meter 11 is connected to the stationary terminal 6 with built-in current transformer, the terminal cover 14 is displayed on the display surface. As shown in the side view of the watt-hour meter 11 in FIG. 6C, the terminal cover is moved from the cover 13 in the vertical direction B of the display surface by moving it in the direction A away from the cover 13 in the horizontal direction. 14 can be removed. As a result, the terminal cover 14 can be removed even when the watt hour meter 11 is connected to the stationary terminal 6 with built-in current transformer, and each time the terminal cover 14 is removed from the cover 13, the watt hour meter There is no need to remove the connection between the terminal portion 11 and the bar terminal 7.

また、本実施形態による電力量計１１によれば、突出部１４ｃの突出長さＬａを操作部１９ａに及ぶ長さに保ちながら、カバー１３の表示面に張り出し部１４ｂが張り出す長さＬｂを抑制することができる。このため、カバー１３の表示面における、使用電力量を表示させる表示窓１５等の配置に張り出し部１４ｂが及ぼす影響を少なくすることができる。   Further, according to the watt-hour meter 11 according to the present embodiment, the length Lb of the projecting portion 14b projecting from the display surface of the cover 13 is maintained while keeping the projecting length La of the projecting portion 14c reaching the operation unit 19a. Can be suppressed. For this reason, the influence which the overhang | projection part 14b has on arrangement | positioning of the display window 15 etc. which display the used electric energy on the display surface of the cover 13 can be decreased.

また、本実施形態による電力量計１１は、端子カバー１４が、張り出し部１４ｂおよび突出部１４ｃと一体に成形されるため、張り出し部１４ｂおよび突出部１４ｃを端子カバー１４の別部品として設ける場合に比較して、電力量計１１の製造コストを低減することができる。   In addition, since the terminal cover 14 is formed integrally with the overhanging portion 14b and the protruding portion 14c, the watt-hour meter 11 according to the present embodiment is provided when the overhanging portion 14b and the protruding portion 14c are provided as separate parts of the terminal cover 14. In comparison, the manufacturing cost of the watt-hour meter 11 can be reduced.

１１…電力量計
１２…ベース
１３…カバー
１３ａ…開放辺
１３ｂ…切り欠き部
１４…端子カバー
１４ａ…塞辺
１４ｂ…張り出し部
１４ｃ…突出部
１５…表示窓
１６ａ、１６ｂ…封印ねじ
１７…端子金具
１８…回路基板
１９…検出スイッチ
１９ａ…操作部 DESCRIPTION OF SYMBOLS 11 ... Electricity meter 12 ... Base 13 ... Cover 13a ... Open side 13b ... Notch part 14 ... Terminal cover 14a ... Closed side 14b ... Overhang part 14c ... Projection part 15 ... Display window 16a, 16b ... Seal screw 17 ... Terminal metal fittings 18 ... Circuit board 19 ... Detection switch 19a ... Operation part

Claims (3)

使用電力量を表示させる表示窓を表示面に有する、端子部を開放して内部部品を覆うカバーと、前記表示面の開放辺に塞辺が合わされて前面が前記表示面に連なり、前記カバーによって覆われない前記端子部を覆う端子カバーと、前記表示面の開放辺に前記前面の塞辺が合わされて前記カバーに前記端子カバーが装着されたことを検出する、前記カバーに覆われる検出スイッチとを備える電力量計において、
前記カバーは、前記検出スイッチを覆う位置に向かって切り欠かれた切り欠き部が前記開放辺に形成され、
前記検出スイッチは操作部が前記切り欠き部に臨んで設けられ、
前記端子カバーは、前記カバーへの装着時に前記切り欠き部に嵌合して前記前面が前記表示面に連なる、前記塞辺に形成された張り出し部と、前記操作部の設置高さに及ぶ厚さを有して前記張り出し部の背面側に設けられ、前記カバーへの装着時に前記操作部に及ぶ突出長さを有する突出部とを備える
ことを特徴とする電力量計。 A display window for displaying the amount of power used is provided on the display surface, a cover that covers the internal components by opening the terminal portion, a closed side is fitted to the open side of the display surface, and the front surface is connected to the display surface. A terminal cover that covers the terminal portion that is not covered; and a detection switch that is covered by the cover that detects that the open side of the display surface is aligned with the closed side of the front surface and the terminal cover is attached to the cover. In a watt hour meter comprising:
The cover is formed with a cutout portion cut out toward the position covering the detection switch on the open side,
The detection switch is provided with an operation unit facing the notch,
The terminal cover is fitted to the notch when the cover is attached to the cover, and the front surface is connected to the display surface. And a projecting portion provided on the back side of the projecting portion and having a projecting length extending to the operation portion when mounted on the cover. 前記端子カバーは、前記突出部の突出長さが前記張り出し部の張り出し長さよりも長く形成されることを特徴とする請求項１に記載の電力量計。   The watt-hour meter according to claim 1, wherein the terminal cover is formed such that a protruding length of the protruding portion is longer than a protruding length of the protruding portion. 前記端子カバーは、前記張り出し部および前記突出部と一体に成形されることを特徴とする請求項１または請求項２に記載の電力量計。   The watt-hour meter according to claim 1, wherein the terminal cover is formed integrally with the protruding portion and the protruding portion.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112114194A (en) * 2020-08-19 2020-12-22 宁波三星医疗电气股份有限公司 Electric energy meter operation control method

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US6059605A (en) * 1997-10-30 2000-05-09 Ekstrom Industries, Inc. Watthour meter socket adapter
JP2009036661A (en) * 2007-08-02 2009-02-19 Tokyo Electric Power Co Inc:The Watthour meter
JP2014153296A (en) * 2013-02-13 2014-08-25 Panasonic Corp Remote meter-reading device

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Publication number Priority date Publication date Assignee Title
US6059605A (en) * 1997-10-30 2000-05-09 Ekstrom Industries, Inc. Watthour meter socket adapter
JP2009036661A (en) * 2007-08-02 2009-02-19 Tokyo Electric Power Co Inc:The Watthour meter
JP2014153296A (en) * 2013-02-13 2014-08-25 Panasonic Corp Remote meter-reading device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112114194A (en) * 2020-08-19 2020-12-22 宁波三星医疗电气股份有限公司 Electric energy meter operation control method

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