JP4390109B2 - power outlet - Google Patents

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JP4390109B2
JP4390109B2 JP2004224600A JP2004224600A JP4390109B2 JP 4390109 B2 JP4390109 B2 JP 4390109B2 JP 2004224600 A JP2004224600 A JP 2004224600A JP 2004224600 A JP2004224600 A JP 2004224600A JP 4390109 B2 JP4390109 B2 JP 4390109B2
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hole
plug
power outlet
bushing
outlet
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JP2006048963A (en
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敦至 吉田
浩司 水野
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河村電器産業株式会社
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Priority to TW094125628A priority patent/TW200618418A/en
Priority to KR1020050069186A priority patent/KR100892835B1/en
Priority to US11/192,399 priority patent/US7217147B2/en
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Description

本発明は、トラッキングに至る前に発生する火花放電を検知してトラッキングの発生を防止する電源コンセントに関する。   The present invention relates to a power outlet that detects a spark discharge that occurs before tracking and prevents the occurrence of tracking.

従来、トラッキングを防止する機能を有する電源コンセントとして特許文献1に示すものがある。特許文献1は電源コンセント前面の受刃間に導電板を配置し、一端は表面から突出させ、もう一端はアース端子に接続させることで、トラッキングに至る前に発生する火花放電が発生した際にプラグの両刃間に流れる電流を導電板を介してアース端子に流し、漏電ブレーカに漏電電流として検知させて電路を遮断させている。   Conventionally, there is a power outlet shown in Patent Document 1 having a function of preventing tracking. In Patent Document 1, a conductive plate is disposed between the receiving blades on the front surface of the power outlet, one end protrudes from the surface, and the other end is connected to the ground terminal, so that when a spark discharge occurs before tracking occurs. The electric current flowing between the two blades of the plug is passed through the conductive plate to the ground terminal, and the electric leakage breaker is detected as the electric leakage current to interrupt the electric circuit.

特開2001−35599号公報JP 2001-35599 A

従来の電源コンセントはトラッキングに至る前に発生する火花放電を検出するセンサである導電板が電源コンセント表面に露出しているため、導電性のものが接触した際に誤動作する虞があったし、プラグ利用者の手等が接触することも考えられ、好ましいものではなかった。そこで本出願人は特願2003−120546により、センサを電源コンセントのカバー表面に露出させずにカバー表面のプラグ挿入口間に形成した小さな透孔の内側にセンサを配置し、透孔から進入した微小な火花放電をセンサにより検出する電源コンセントを提案している。カバーに形成される透孔は水や埃が入らないようしたり、センサからの出力電流を小さくしてアンプ回路の負荷を軽減するために小さければ小さいほど良いが、従来の電源コンセントは透孔を電源コンセントのカバーに直接形成しているため、直径0.5mm程度が限界であり、また、成形性が悪く生産性が良くないという欠点があった。   In the conventional power outlet, the conductive plate, which is a sensor that detects spark discharge that occurs before tracking, is exposed on the surface of the power outlet. It is also possible that the plug user's hand will come into contact, which is not preferable. Therefore, according to Japanese Patent Application No. 2003-120546, the present applicant placed the sensor inside the small through hole formed between the plug insertion holes on the cover surface without exposing the sensor to the cover surface of the power outlet, and entered the through hole. We have proposed a power outlet that detects minute spark discharge with a sensor. The smaller the size of the through-hole formed in the cover, the better to prevent water and dust from entering, or to reduce the load on the amplifier circuit by reducing the output current from the sensor. Is directly formed on the cover of the power outlet, so that there is a limit of about 0.5 mm in diameter, and there is a disadvantage that the formability is poor and the productivity is not good.

本発明は、絶縁材料により形成したコンセントケースの前面に1対のプラグ挿入口を1個又は複数個形成し、プラグ挿入口の内側にプラグの栓刃を挟持する受刃を配設し、プラグ挿入口間に透孔を形成し、透孔の内側に栓刃間に発生する火花放電を検知するセンサを配設し、センサに火花放電が接触して電流が流れることでトラッキングを検出して成る電源コンセントにおいて、透孔にブッシングを挿入して装着し、ブッシングと透孔との接触面の少なくとも一部にコンセントケースの外面とコンセントケースの内面とを連通させる隙間を有することを特徴とする。 According to the present invention, one or a plurality of plug insertion holes are formed on the front surface of an outlet case made of an insulating material, and a receiving blade for holding the plug blade of the plug is provided inside the plug insertion hole. A through-hole is formed between the insertion holes, a sensor that detects spark discharge generated between the plug blades is arranged inside the through-hole, and tracking is detected when the spark discharge contacts the sensor and current flows. In the power outlet, the bushing is inserted into the through hole and attached, and at least a part of the contact surface between the bushing and the through hole has a gap for communicating the outer surface of the outlet case and the inner surface of the outlet case. .

本発明の電源コンセントは、透孔を限界まで小さく形成する必要がないのでコンセントケースの成形性が良く、生産性が向上するとともに、火花放電を検知するための孔の孔径を小さくすることができるという効果がある。   Since the power outlet of the present invention does not require the through hole to be formed as small as possible, the outlet case has good moldability, productivity is improved, and the hole diameter for detecting spark discharge can be reduced. There is an effect.

電源コンセントはコンセントケースの前面のプラグ挿入口間に形成された透孔にブッシングを挿入して装着し、ブッシングと透孔との接触面の少なくとも一部にコンセントケースの外面とコンセントケースの内面とを連通させる隙間を設ける。プラグの栓刃間に発生する火花放電は隙間からコンセントケース内に進入して透孔の内側に設けたセンサに接触することより検出される。   The power outlet is installed by inserting a bushing into a through-hole formed between the plug insertion openings on the front of the outlet case, and at least part of the contact surface between the bushing and the through-hole is connected to the outer surface of the outlet case and the inner surface of the outlet case. Provide a gap to allow communication. A spark discharge generated between the plug blades of the plug is detected by entering the outlet case through the gap and contacting a sensor provided inside the through hole.

本発明に係る電源コンセントの実施例1を図1〜図3の添付図面に基づいて説明する。   A first embodiment of a power outlet according to the present invention will be described with reference to the accompanying drawings of FIGS.

電源コンセント1は、絶縁材料によりコンセントケース2が形成され、コンセントケース2の前面にプラグの栓刃(図示せず)を挿入するための1対のプラグ挿入口3,3が中央と下部の2箇所に形成され、プラグ挿入口3の内側にはプラグの栓刃を挟持する受刃4が配設され、また、夫々のプラグ挿入口3,3間の中間位置に透孔5が形成されている。   In the power outlet 1, an outlet case 2 is formed of an insulating material, and a pair of plug insertion openings 3 and 3 for inserting plug blades (not shown) on the front surface of the outlet case 2 are provided at the center and the lower part 2. A receiving blade 4 for holding the plug blade of the plug is disposed inside the plug insertion port 3, and a through hole 5 is formed at an intermediate position between the plug insertion ports 3 and 3. Yes.

透孔5には、ブッシング6が取り付けられる。ブッシング6は絶縁材料により透孔5の形状より外形が僅かに小さく形成され、端部に係止突起6aが形成され、ブッシング6を透孔5に挿入すると係止突起6aが透孔5の端縁に係止することにより装着されている。これにより、透孔5とブッシング6との接触面にコンセントケース2の外面とコンセントケース2の内面とを連通させる隙間7ができ、後述するセンサ8が火花放電を検出する際の孔として利用される。   A bushing 6 is attached to the through hole 5. The bushing 6 is formed of an insulating material with an outer shape slightly smaller than the shape of the through hole 5, and a locking projection 6 a is formed at the end. When the bushing 6 is inserted into the through hole 5, the locking projection 6 a becomes the end of the through hole 5. It is mounted by locking to the edge. As a result, a gap 7 is formed in the contact surface between the through hole 5 and the bushing 6 so that the outer surface of the outlet case 2 and the inner surface of the outlet case 2 communicate with each other, and the sensor 8 described later is used as a hole for detecting spark discharge. The

コンセントケース2の内部には透孔5の内側にセンサ8が配設されている。センサ8は金属片等の導電部材により形成され、コンセントケース2の内部に配設されたプリント基板9のトラッキング検出回路に接続されている。   A sensor 8 is disposed inside the through hole 5 inside the outlet case 2. The sensor 8 is formed of a conductive member such as a metal piece and is connected to a tracking detection circuit of a printed circuit board 9 disposed inside the outlet case 2.

電源コンセント1のトラッキング検出動作を説明すると、受刃4,4に接続されたプラグの栓刃間に埃等が溜まり空気中の湿気を吸収することにより水分を介して栓刃間に微小な電流が流れ、その電荷を帯びた水分が気化して火花放電が発生する。そして、火花放電が透孔5とブッシング6との隙間7から進入してセンサ8に接触すると微小な電流が流れる。このセンサ8の出力電流からトラッキング検出回路はトラッキングを検出し、コンセントケース2に内蔵したブレーカ10を作動させて電路を遮断すると共に表示ランプ11によって表示を行うようになっている。   The tracking detection operation of the power outlet 1 will be described. Dust and the like accumulate between the plug blades of the plugs connected to the receiving blades 4 and 4 to absorb moisture in the air, so that a minute current is generated between the plug blades through moisture. Flows and the charged water vaporizes and spark discharge occurs. When a spark discharge enters through the gap 7 between the through hole 5 and the bushing 6 and contacts the sensor 8, a minute current flows. The tracking detection circuit detects tracking from the output current of the sensor 8, operates the breaker 10 built in the outlet case 2 to cut off the electric circuit, and displays on the display lamp 11.

このように、電源コンセント1は透孔5にブッシング6を取り付けることによって透孔5の孔径はそれほど小さくしなくても良いのでコンセントケース2の成形性が良く、生産性が向上する。また、透孔5とブッシング6の隙間7をセンサ8の検出用の孔として利用するので従来に比べてこの孔を小さくすることができる。   Thus, since the power outlet 1 does not need to make the hole diameter of the through-hole 5 small by attaching the bushing 6 to the through-hole 5, the formability of the outlet case 2 is good and the productivity is improved. Further, since the gap 7 between the through hole 5 and the bushing 6 is used as a detection hole of the sensor 8, this hole can be made smaller than in the prior art.

本発明に係る電源コンセントの実施例2を図4〜図6の添付図面に基づいて説明する。尚、実施例1と同一部分は同一符号を付して説明を省略する。   A second embodiment of the power outlet according to the present invention will be described with reference to the accompanying drawings of FIGS. In addition, the same part as Example 1 attaches | subjects the same code | symbol, and abbreviate | omits description.

本実施例では、ブッシング6は透孔5と略同一形状に形成され、ブッシング6の透孔5と接触する面に挿入方向に延びる複数の溝6bが形成されている。この溝6bはブッシング6と透孔5との接触面の隙間7となり、火花放電は溝6bから進入するのでセンサ8により検出することができる。尚、透孔5のブッシング6と接触する面に溝を形成しても良く、溝の本数は1本でも良いが、複数本にすればセンサ8の検出範囲を広くすることができる。   In this embodiment, the bushing 6 is formed in substantially the same shape as the through hole 5, and a plurality of grooves 6 b extending in the insertion direction are formed on the surface of the bushing 6 in contact with the through hole 5. This groove 6b becomes a gap 7 between the contact surfaces of the bushing 6 and the through hole 5, and spark discharge enters from the groove 6b and can be detected by the sensor 8. A groove may be formed on the surface of the through hole 5 that contacts the bushing 6, and the number of grooves may be one, but if a plurality of grooves are used, the detection range of the sensor 8 can be widened.

尚、実施例では透孔を円形に形成したが、例えば、矩形状に形成したり、長孔形状に形成してもよく、透孔及びブッシングの両者間に隙間ができれば形状について限定はない。また、ブッシングの取り付け構造についても接着して取り付けても良いし、圧入して取り付けても良く、限定はない。また、電源コンセントはプラグが2個接続できる2口電源コンセントであるが、1口電源コンセントでも良いし、複数個のプラグが接続できるタップ等でも良い。また、ブレーカを内蔵して電路を遮断するようになっているがトラッキング検出時の動作について限定はない。   In the embodiment, the through hole is formed in a circular shape, but for example, it may be formed in a rectangular shape or a long hole shape, and the shape is not limited as long as a gap is formed between both the through hole and the bushing. Also, the bushing attachment structure may be attached by adhesion, or may be attached by press fitting, and there is no limitation. The power outlet is a two-port power outlet that can connect two plugs, but may be a one-port power outlet or a tap that can connect a plurality of plugs. Moreover, although the breaker is built in and the electric circuit is cut off, the operation at the time of tracking detection is not limited.

本発明の実施例1に係る電源コンセントの正面図である。It is a front view of the power outlet concerning Example 1 of the present invention. 図1のA−A線断面図である。It is the sectional view on the AA line of FIG. 本発明の実施例1に係るブッシングを示す斜視図である。It is a perspective view which shows the bushing which concerns on Example 1 of this invention. 本発明の実施例2に係る電源コンセントの正面図である。It is a front view of the power outlet concerning Example 2 of the present invention. 図1のD−D線断面図である。It is the DD sectional view taken on the line of FIG. 本発明の実施例2に係るブッシングを示す斜視図である。It is a perspective view which shows the bushing which concerns on Example 2 of this invention.

符号の説明Explanation of symbols

1 電源コンセント
2 コンセントケース
3 プラグ挿入口
4 受刃
5 透孔
6 ブッシング
7 隙間
8 センサ
DESCRIPTION OF SYMBOLS 1 Power outlet 2 Outlet case 3 Plug insertion slot 4 Receiving blade 5 Through-hole 6 Bushing 7 Gap 8 Sensor

Claims (1)

絶縁材料により形成したコンセントケースの前面に1対のプラグ挿入口を1個又は複数個形成し、該プラグ挿入口の内側にプラグの栓刃を挟持する受刃を配設し、前記プラグ挿入口間に透孔を形成し、該透孔の内側に前記栓刃間に発生する火花放電を検知するセンサを配設し、該センサに前記火花放電が接触して電流が流れることでトラッキングを検出して成る電源コンセントにおいて、前記透孔にブッシングを挿入して装着し、該ブッシングと前記透孔との接触面の少なくとも一部に前記コンセントケースの外面と前記コンセントケースの内面とを連通させる隙間を有することを特徴とする電源コンセント。 One or more pairs of plug insertion openings are formed on the front surface of the outlet case formed of an insulating material, and a receiving blade for holding the plug blade of the plug is disposed inside the plug insertion opening. A through hole is formed in between, a sensor that detects spark discharge generated between the plug blades is arranged inside the through hole , and tracking is detected when the spark discharge contacts the sensor and current flows. In the power outlet, the bushing is inserted and inserted into the through hole, and the clearance between the outer surface of the outlet case and the inner surface of the outlet case communicates with at least a part of the contact surface between the bushing and the through hole. A power outlet characterized by having.
JP2004224600A 2004-07-30 2004-07-30 power outlet Active JP4390109B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2004224600A JP4390109B2 (en) 2004-07-30 2004-07-30 power outlet
TW094125628A TW200618418A (en) 2004-07-30 2005-07-28 Power outlet
KR1020050069186A KR100892835B1 (en) 2004-07-30 2005-07-29 Electric socket device
US11/192,399 US7217147B2 (en) 2004-07-30 2005-07-29 Power source outlet device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004224600A JP4390109B2 (en) 2004-07-30 2004-07-30 power outlet

Publications (2)

Publication Number Publication Date
JP2006048963A JP2006048963A (en) 2006-02-16
JP4390109B2 true JP4390109B2 (en) 2009-12-24

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4859105B2 (en) * 2006-02-28 2012-01-25 河村電器産業株式会社 Plug
JP5342405B2 (en) * 2009-10-29 2013-11-13 河村電器産業株式会社 Wiring equipment
JP5342406B2 (en) * 2009-10-29 2013-11-13 河村電器産業株式会社 Wiring equipment

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