JP7487656B2 - Electromagnetic Relay - Google Patents

Electromagnetic Relay Download PDF

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JP7487656B2
JP7487656B2 JP2020213406A JP2020213406A JP7487656B2 JP 7487656 B2 JP7487656 B2 JP 7487656B2 JP 2020213406 A JP2020213406 A JP 2020213406A JP 2020213406 A JP2020213406 A JP 2020213406A JP 7487656 B2 JP7487656 B2 JP 7487656B2
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movable contact
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contact
extension portion
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JP2022099570A (en
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剛 西田
和樹 古川
尭 塚田
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Omron Corp
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Description

本発明は、電磁継電器に関する。 The present invention relates to an electromagnetic relay.

従来、電気回路を開閉する電磁継電器が知られている。例えば、特許文献１の電磁継電器は、固定接点を含む固定端子と、可動接点を含む可動接触片と、永久磁石とを備えている。永久磁石は、可動接点が固定接点から開離するときに発生するアークを伸長させるための磁界を発生させる。これにより、アークにローレンツ力が作用してアークが伸長される。 Conventionally, electromagnetic relays that open and close electric circuits are known. For example, the electromagnetic relay of Patent Document 1 includes a fixed terminal including a fixed contact, a movable contact piece including a movable contact, and a permanent magnet. The permanent magnet generates a magnetic field for extending the arc that is generated when the movable contact separates from the fixed contact. As a result, a Lorentz force acts on the arc, causing the arc to be extended.

特許第６２８１３０１号公報Patent No. 6281301

電磁継電器では、設計上の都合、或いはスペース等を有効に活用するために、アークを一方向に大きく伸長させたい場合がある。特に、可動接触片の裏側（可動接点が配置される側と反対側）には、可動接触片の動作スペースが設けられるので、可動接触片の裏側の空間でアークを伸長させることで可動接触片の動作スペースを有効活用することができる。また、特許文献１では、アークが樹脂壁に当たって樹脂壁が劣化するおそれがある。 In electromagnetic relays, it is sometimes necessary to extend the arc significantly in one direction for design reasons or to make effective use of space. In particular, the rear side of the movable contact piece (the side opposite to the side where the movable contact is arranged) is provided with an operating space for the movable contact piece, so by extending the arc in the space behind the movable contact piece, it is possible to make effective use of the operating space for the movable contact piece. Furthermore, in Patent Document 1, there is a risk that the arc will hit the resin wall, causing the resin wall to deteriorate.

本発明の課題は、電磁継電器において、可動接触片の裏側の空間でアークを伸長させることにある。 The objective of this invention is to extend the arc in the space behind the movable contact piece in an electromagnetic relay.

本発明の一態様に係る電磁継電器は、第１固定端子と、可動接触片と、駆動装置と、磁石部とを備える。第１固定端子は、第１固定接点を含む。可動接触片は、第１固定接点に向かい合う第１可動接点を含む。可動接触片は、第１方向に移動可能である。第１方向は、第１可動接点が第１固定接点に近づく接触方向と、第１可動接点が第１固定接点から開離する開離方向とを含む。駆動装置は、可動接触片を第１方向に移動させる。磁石部は、第１固定接点と第１可動接点との間で発生したアークを伸長させるための磁界を第２方向に発生させる。第２方向は、第１方向と直交する。第１固定端子は、第１方向から見て可動接触片と重ならない端子延長部を含む。端子延長部は、第２方向から見てアークが伸長される伸長方向に延びる第１延伸部と、第１延伸部から開離方向に屈曲した第２延伸部とを含む。 An electromagnetic relay according to one aspect of the present invention includes a first fixed terminal, a movable contact piece, a drive unit, and a magnet unit. The first fixed terminal includes a first fixed contact. The movable contact piece includes a first movable contact facing the first fixed contact. The movable contact piece is movable in a first direction. The first direction includes a contact direction in which the first movable contact approaches the first fixed contact and a separation direction in which the first movable contact separates from the first fixed contact. The drive unit moves the movable contact piece in the first direction. The magnet unit generates a magnetic field in a second direction for extending an arc generated between the first fixed contact and the first movable contact. The second direction is perpendicular to the first direction. The first fixed terminal includes a terminal extension portion that does not overlap with the movable contact piece when viewed from the first direction. The terminal extension portion includes a first extension portion that extends in an extension direction in which the arc is extended when viewed from the second direction, and a second extension portion that is bent from the first extension portion in the separation direction.

この電磁継電器では、端子延長部の第１延伸部と第２延伸部とによって第１固定接点と第１可動接点との間で発生したアークの移動が案内されることで、可動接触片の裏側の空間でアークを伸長させることができる。詳細には、第１固定端子を移動するアークの端部が、伸長方向に延びる第１延伸部を通過した後で接触方向に屈曲した第２延伸部によって開離方向に案内される。そして、アークの端部が開離方向に移動した後は、開離方向へのローレンツ力がアークに作用することになるので、可動接触片の裏側の空間でアークを伸長させることができる。また、例えば、伸長方向に位置する樹脂壁にアークが当たって樹脂壁が劣化することを第２延伸部によって抑制できる。 In this electromagnetic relay, the movement of the arc generated between the first fixed contact and the first movable contact is guided by the first extension and the second extension of the terminal extension, so that the arc can be extended in the space behind the movable contact piece. In detail, the end of the arc moving through the first fixed terminal is guided in the opening direction by the second extension that is bent in the contact direction after passing through the first extension extending in the extension direction. Then, after the end of the arc moves in the opening direction, a Lorentz force in the opening direction acts on the arc, so that the arc can be extended in the space behind the movable contact piece. In addition, for example, the second extension can prevent the arc from hitting a resin wall located in the extension direction, causing the resin wall to deteriorate.

第２延伸部は、第２方向の寸法が徐々に小さくなる先細り形状を有していてもよい。この場合は、アークの伸長方向の制御が容易になる。 The second extension portion may have a tapered shape in which the dimension in the second direction gradually decreases. In this case, it is easier to control the extension direction of the arc.

可動接触片は、第１可動接点が第１固定接点に接触する閉位置と、第１可動接点が第１固定接点から開離した開位置とに移動可能であってもよい。第２延伸部は、可動接触片が開位置にあるときにおいて、可動接触片よりも開離方向に突出していてもよい。この場合は、より効果的に可動接触片の裏側の空間でアークを伸長させることができる。また、例えば、伸長方向に位置する樹脂壁にアークが当たって樹脂壁が劣化することを第２延伸部によってより効果的に抑制できる。
 The movable contact piece may be movable between a closed position where the first movable contact is in contact with the first fixed contact and an open position where the first movable contact is separated from the first fixed contact. The second extension portion may protrude in the separation direction beyond the movable contact piece when the movable contact piece is in the open position. In this case, the arc can be more effectively extended in the space behind the movable contact piece. In addition, for example, the second extension portion can more effectively prevent the resin wall located in the extension direction from being deteriorated due to the arc hitting the resin wall.

電磁継電器は、第１方向及び第２方向と直交する第３方向に第１固定接点から離れて配置された第２固定接点を含む第２固定端子をさらに備えてもよい。可動接触片は、第２固定接点に向かい合う第２可動接点と、アークが第３方向における可動接触片への中央に近づく方向に移動することを制限する段部とをさらに含んでもよい。この場合は、例えば、可動接触片の中央に配置される駆動軸などの可動部材にアークが当たることを段部によって抑制できる。 The electromagnetic relay may further include a second fixed terminal including a second fixed contact disposed away from the first fixed contact in a third direction perpendicular to the first and second directions. The movable contact piece may further include a second movable contact facing the second fixed contact, and a step portion that restricts the arc from moving in a direction approaching the center of the movable contact piece in the third direction. In this case, for example, the step portion can prevent the arc from hitting a movable member such as a drive shaft that is disposed in the center of the movable contact piece.

第１固定端子の端子延長部は、第１延伸部と第２延伸部との境界に形成されたガス抜き孔をさらに含んでもよい。この場合は、ホットガスの滞留をガス抜き孔によって抑制できる。 The terminal extension portion of the first fixed terminal may further include a gas vent hole formed at the boundary between the first extension portion and the second extension portion. In this case, the gas vent hole can prevent hot gas from accumulating.

第１固定端子の端子延長部は、第２延伸部に形成されたガス抜き孔をさらに含んでもよい。この場合は、ホットガスの滞留をガス抜き孔によって抑制できる。 The terminal extension portion of the first fixed terminal may further include a gas vent hole formed in the second extension portion. In this case, the gas vent hole can prevent hot gas from accumulating.

可動接触片は、第１可動接点が配置される部分における伸長方向と平行な方向の寸法が、第１可動接点の直径以下であってもよい。この場合は、アークを可動接触片の裏側に迅速に移動させることができる。 The dimension of the movable contact piece in a direction parallel to the extension direction at the portion where the first movable contact is located may be equal to or less than the diameter of the first movable contact. In this case, the arc can be moved quickly to the back side of the movable contact piece.

可動接触片は、第１可動接点が配置される側と反対側かつアークが通過する角部を含んでもよい。角部は、Ｒ形状を有していてもよい。この場合は、アークを可動接触片の裏側に迅速に移動させることができる。 The movable contact piece may include a corner portion on the side opposite to the side where the first movable contact is located and through which the arc passes. The corner portion may have an R-shape. In this case, the arc can be moved quickly to the back side of the movable contact piece.

本発明によれば、電磁継電器において、可動接触片の裏側の空間でアークを伸長させることができる。 According to the present invention, in an electromagnetic relay, the arc can be extended in the space behind the movable contact piece.

電磁継電器の斜視図である。FIG. カバーを取り外した状態の電磁継電器の斜視図である。FIG. 2 is a perspective view of the electromagnetic relay with the cover removed. カバーを取り外した状態の電磁継電器を前方から見た図である。FIG. 2 is a front view of the electromagnetic relay with the cover removed. 接点装置の一部及び磁石部の斜視図である。FIG. 2 is a perspective view of a part of the contact device and a magnet portion. 接点装置の一部及び磁石部を右方から見た図である。4 is a right view of a part of the contact device and a magnet portion. FIG. 第１固定端子及び可動接触片を前方から見た図である。4 is a front view of the first fixed terminal and the movable contact piece. FIG. 第１固定端子及び可動接触片を前方から見た図である。4 is a front view of the first fixed terminal and the movable contact piece. FIG. 変形例に係る第１固定端子及び可動接触片を前方から見た図である。13 is a front view of a first fixed terminal and a movable contact piece according to a modified example. FIG. 変形例に係る第１固定端子の斜視図である。FIG. 11 is a perspective view of a first fixed terminal according to a modified example. 変形例に係る第１固定端子の斜視図である。FIG. 11 is a perspective view of a first fixed terminal according to a modified example. 変形例に係る第１固定端子の斜視図である。FIG. 11 is a perspective view of a first fixed terminal according to a modified example. 変形例に係る第１固定端子の斜視図である。FIG. 11 is a perspective view of a first fixed terminal according to a modified example. 変形例に係る可動接触片を下方から見た図である。13 is a bottom view of a movable contact piece according to a modified example. FIG. 変形例に係る可動接触片の斜視図である。FIG. 11 is a perspective view of a movable contact piece according to a modified example.

以下、本発明の一態様に係る電磁継電器の実施形態について、図面を参照して説明する。各図面において、Ｚ２で示す方向を上方向、Ｚ１で示す方向を下方向、Ｘ１で示す方向を左方向、Ｘ２で示す方向を右方向、Ｙ１で示す方向を前方向、Ｙ２で示す方向を後方向として説明する。なお、これらの方向は、説明の便宜上、定義されるものであって、電磁継電器の配置方向を限定するものではない。 Below, an embodiment of an electromagnetic relay according to one aspect of the present invention will be described with reference to the drawings. In each drawing, the direction indicated by Z2 is the upward direction, the direction indicated by Z1 is the downward direction, the direction indicated by X1 is the leftward direction, the direction indicated by X2 is the rightward direction, the direction indicated by Y1 is the forward direction, and the direction indicated by Y2 is the backward direction. Note that these directions are defined for the convenience of explanation, and do not limit the arrangement direction of the electromagnetic relay.

図１から図３に示すように、電磁継電器１は、ケース２と、接点装置３と、駆動装置４と、磁石部５とを備えている。なお、図２及び図３では、図面を見易くするために磁石部５の図示を省略している。ケース２は、樹脂などの絶縁性を有する材料で形成されている。ケース２は、箱形に形成されている。ケース２は、ベース２ａと、カバー２ｂとを含む。ベース２ａは、接点装置３及び駆動装置４を支持している。カバー２ｂは、ベース２ａを上方から覆うようにベース２ａに取り付けられている。接点装置３及び駆動装置４は、ケース２に収容されている。 As shown in Figures 1 to 3, the electromagnetic relay 1 includes a case 2, a contact device 3, a drive device 4, and a magnet unit 5. Note that in Figures 2 and 3, the magnet unit 5 is not shown to make the drawings easier to see. The case 2 is made of an insulating material such as resin. The case 2 is formed in a box shape. The case 2 includes a base 2a and a cover 2b. The base 2a supports the contact device 3 and the drive device 4. The cover 2b is attached to the base 2a so as to cover the base 2a from above. The contact device 3 and the drive device 4 are housed in the case 2.

図４は、接点装置３の一部及び磁石部５の斜視図である。図５は、接点装置３の一部及び磁石部５を前方から見た図である。図２から図５に示すように、接点装置３は、第１固定端子６と、第２固定端子７と、可動接触片８と、可動部材９、接点バネ１０とを含む。 Figure 4 is a perspective view of a part of the contact device 3 and the magnet portion 5. Figure 5 is a view of a part of the contact device 3 and the magnet portion 5 from the front. As shown in Figures 2 to 5, the contact device 3 includes a first fixed terminal 6, a second fixed terminal 7, a movable contact piece 8, a movable member 9, and a contact spring 10.

第１固定端子６は、板状の端子であり、銅などの導電性を有する材料で形成されている。第１固定端子６は、ベース２ａに固定されている。第１固定端子６は、接点支持部１１と、第１固定接点１２と、端子延長部１３と、端子延長部１４と、被支持部１５とを含む。 The first fixed terminal 6 is a plate-shaped terminal and is made of a conductive material such as copper. The first fixed terminal 6 is fixed to the base 2a. The first fixed terminal 6 includes a contact support portion 11, a first fixed contact 12, a terminal extension portion 13, a terminal extension portion 14, and a supported portion 15.

接点支持部１１は、前後方向及び左右方向に延びている。接点支持部１１は、上下方向から見て可動接触片８と重なる。第１固定接点１２は、接点支持部１１に支持されている。第１固定接点１２は、接点支持部１１から上方に突出している。なお、第１固定接点１２は、第１固定端子６と一体であってもよい。 The contact support portion 11 extends in the front-rear and left-right directions. When viewed from the top-bottom direction, the contact support portion 11 overlaps with the movable contact piece 8. The first fixed contact 12 is supported by the contact support portion 11. The first fixed contact 12 protrudes upward from the contact support portion 11. The first fixed contact 12 may be integral with the first fixed terminal 6.

図６は、第１固定端子６及び可動接触片８を前方から見た図である。端子延長部１３，１４は、接点支持部１１に連続して形成されている。端子延長部１３は、接点支持部１１の左端に接続されている。端子延長部１４は、接点支持部１１の右端に接続されている。端子延長部１３，１４は、第１方向から見て可動接触片８と重ならない。本実施形態における第１方向は、上下方向である。 Figure 6 is a view of the first fixed terminal 6 and the movable contact piece 8 as seen from the front. The terminal extensions 13, 14 are formed continuously with the contact support part 11. The terminal extension 13 is connected to the left end of the contact support part 11. The terminal extension 14 is connected to the right end of the contact support part 11. The terminal extensions 13, 14 do not overlap with the movable contact piece 8 when viewed from the first direction. The first direction in this embodiment is the up-down direction.

端子延長部１３は、第１延伸部１３ａと、第２延伸部１３ｂとを含む。第１延伸部１３ａは、接点支持部１１の左端から左方に延びている。第１延伸部１３ａは、前後方向及び左右方向に延びている。第２延伸部１３ｂは、第１延伸部１３ａに接続されている。第２延伸部１３ｂは、上下方向に延びている。第２延伸部１３ｂは、第１延伸部１３ａから上方に屈曲している。第２延伸部１３ｂは、第２方向の寸法が徐々に小さくなる先細り形状を有している。第２方向は、第１方向と直交する方向である。本実施形態における第２方向は、前後方向である。第２延伸部１３ｂは、上方に延びるにしたがって、前後方向の寸法が小さくなるように形成されている。 The terminal extension 13 includes a first extension 13a and a second extension 13b. The first extension 13a extends leftward from the left end of the contact support 11. The first extension 13a extends in the front-rear and left-right directions. The second extension 13b is connected to the first extension 13a. The second extension 13b extends in the up-down direction. The second extension 13b is bent upward from the first extension 13a. The second extension 13b has a tapered shape in which the dimension in the second direction gradually decreases. The second direction is a direction perpendicular to the first direction. In this embodiment, the second direction is the front-rear direction. The second extension 13b is formed so that the dimension in the front-rear direction decreases as it extends upward.

端子延長部１４は、第１延伸部１４ａと、第２延伸部１４ｂとを含む。端子延長部１４は、第１固定接点１２を挟んで端子延長部１３と左右対称形状であるため、詳細な説明は省略する。 The terminal extension 14 includes a first extension 14a and a second extension 14b. The terminal extension 14 is symmetrical to the terminal extension 13 across the first fixed contact 12, so a detailed description is omitted.

被支持部１５は、前後方向から見て略Ｕ字形状である。被支持部１５は、接点支持部１１の下側において接点支持部１１に固定されている。被支持部１５は、ベース２ａに支持されている。被支持部１５は、１対の外部接続部１５ａを含む。１対の外部接続部１５ａは、被支持部１５の両端に形成されている。１対の外部接続部１５ａは、ベース２ａから下方に突出しており、図示しない外部機器と電気的に接続される。 The supported portion 15 is substantially U-shaped when viewed from the front-rear direction. The supported portion 15 is fixed to the contact support portion 11 on the underside of the contact support portion 11. The supported portion 15 is supported by the base 2a. The supported portion 15 includes a pair of external connection portions 15a. The pair of external connection portions 15a are formed on both ends of the supported portion 15. The pair of external connection portions 15a protrude downward from the base 2a and are electrically connected to an external device (not shown).

第２固定端子７は、板状の端子であり、銅などの導電性を有する材料で形成されている。第２固定端子７は、第１固定端子６と前後方向に離れて配置されている。本実施形態では、第２固定端子７は、第１固定端子６の後方に配置されている。 The second fixed terminal 7 is a plate-shaped terminal made of a conductive material such as copper. The second fixed terminal 7 is disposed away from the first fixed terminal 6 in the front-rear direction. In this embodiment, the second fixed terminal 7 is disposed behind the first fixed terminal 6.

第２固定端子７は、第１固定端子６と同様の形状である。第２固定端子７は、接点支持部２１と、第２固定接点２２と、端子延長部２３と、端子延長部２４と、被支持部２５とを含む。端子延長部２３は、第１延伸部２３ａと、第２延伸部２３ｂとを含む。端子延長部２４は、第１延伸部２４ａと、第２延伸部２４ｂとを含む。被支持部２５は、１対の外部接続部２５ａを含む。第２固定端子７の各構成は、第１固定端子６の各構成と同様であるため説明を省略する。 The second fixed terminal 7 has the same shape as the first fixed terminal 6. The second fixed terminal 7 includes a contact support portion 21, a second fixed contact 22, a terminal extension portion 23, a terminal extension portion 24, and a supported portion 25. The terminal extension portion 23 includes a first extension portion 23a and a second extension portion 23b. The terminal extension portion 24 includes a first extension portion 24a and a second extension portion 24b. The supported portion 25 includes a pair of external connection portions 25a. The configurations of the second fixed terminal 7 are similar to those of the first fixed terminal 6, so a description thereof will be omitted.

可動接触片８は、板状の端子であり、銅などの導電性を有する材料で形成されている。可動接触片８は、前後方向に延びている。可動接触片８は、可動部材９に固定されている。可動接触片８は、第１固定端子６及び第２固定端子７の上方に配置されている。 The movable contact piece 8 is a plate-shaped terminal and is made of a conductive material such as copper. The movable contact piece 8 extends in the front-rear direction. The movable contact piece 8 is fixed to the movable member 9. The movable contact piece 8 is disposed above the first fixed terminal 6 and the second fixed terminal 7.

可動接触片８は、第１可動接点８ａと、第２可動接点８ｂとを含む。第１可動接点８ａは、第１固定接点１２と向かい合って配置されており、第１固定接点１２に接触可能である。第２可動接点８ｂは、第２固定接点２２と向かい合って配置されており、第２固定接点２２に接触可能である。なお、第１可動接点８ａ及び第２可動接点８ｂは、可動接触片８と一体であってもよい。 The movable contact piece 8 includes a first movable contact 8a and a second movable contact 8b. The first movable contact 8a is disposed opposite the first fixed contact 12 and can contact the first fixed contact 12. The second movable contact 8b is disposed opposite the second fixed contact 22 and can contact the second fixed contact 22. The first movable contact 8a and the second movable contact 8b may be integral with the movable contact piece 8.

可動接触片８は、第１方向に移動可能である。第１方向は、第１可動接点８ａが第１固定接点１２に近づく接触方向と、第１可動接点８ａが第１固定接点１２から開離する開離方向とを含む。本実施形態において、接触方向はＺ１で示す方向（下方向）であり、開離方向は、Ｚ２で示す方向（上方向）である。 The movable contact piece 8 is movable in a first direction. The first direction includes a contact direction in which the first movable contact 8a approaches the first fixed contact 12, and a separation direction in which the first movable contact 8a separates from the first fixed contact 12. In this embodiment, the contact direction is the direction indicated by Z1 (downward), and the separation direction is the direction indicated by Z2 (upward).

可動接触片８は、図６に示す開位置と、図７に示す閉位置とに移動可能である。可動接触片８が開位置にあるときは、第１可動接点８ａが第１固定接点１２から開離し、第２可動接点８ｂが第２固定接点２２から開離している。可動接触片８が閉位置にあるときは、第１可動接点８ａが第１固定接点１２に接触し、第２可動接点８ｂが第２固定接点２２に接触する。 The movable contact piece 8 can be moved between an open position shown in FIG. 6 and a closed position shown in FIG. 7. When the movable contact piece 8 is in the open position, the first movable contact 8a is separated from the first fixed contact 12, and the second movable contact 8b is separated from the second fixed contact 22. When the movable contact piece 8 is in the closed position, the first movable contact 8a is in contact with the first fixed contact 12, and the second movable contact 8b is in contact with the second fixed contact 22.

可動部材９は、上下方向に延びている。可動部材９は、第１可動接点８ａと第２可動接点８ｂの間で可動接触片８に連結されている。可動部材９は、前後方向における可動接触片８の中央に配置されている。可動部材９は、樹脂などの絶縁性を有する材料で形成されている。 The movable member 9 extends in the vertical direction. The movable member 9 is connected to the movable contact piece 8 between the first movable contact 8a and the second movable contact 8b. The movable member 9 is disposed in the center of the movable contact piece 8 in the front-rear direction. The movable member 9 is formed of an insulating material such as resin.

可動部材９は、第１部材３１と、第２部材３２とを含む。第１部材３１は、可動接触片８が固定されており、可動接触片８と一体的に上下方向に移動する。詳細には、図３に示すように、第１部材３１に挿入されるブッシュ３４によって可動接触片８が第１部材３１に固定されている。 The movable member 9 includes a first member 31 and a second member 32. The first member 31 has the movable contact piece 8 fixed thereto, and moves vertically together with the movable contact piece 8. In detail, as shown in FIG. 3, the movable contact piece 8 is fixed to the first member 31 by a bush 34 inserted into the first member 31.

第１部材３１の上下方向の移動は、ベース２ａに形成された図示しないガイド部によってガイドされる。ガイド部は、ベース２ａの上面において、下方に凹むように形成されており、上方から見て、非円形状に形成されている。ガイド部は、第１部材３１の左右方向及び前後方向への移動を制限する。第１部材９ａは、ガイド部にガイドされる摺動部３１ａを含む。摺動部３１ａは、第１部材３１の下端に形成されており、ガイド部の形状に沿う形状を有している。第１部材３１は、ガイド部によって上下方向に平行な軸回りの回転が制限されている。 The vertical movement of the first member 31 is guided by a guide portion (not shown) formed on the base 2a. The guide portion is formed on the upper surface of the base 2a so as to be concave downwards, and is formed in a non-circular shape when viewed from above. The guide portion limits the movement of the first member 31 in the left-right and front-rear directions. The first member 9a includes a sliding portion 31a that is guided by the guide portion. The sliding portion 31a is formed on the lower end of the first member 31, and has a shape that follows the shape of the guide portion. The guide portion limits the rotation of the first member 31 around an axis parallel to the vertical direction.

第２部材３２は、第１部材３１の上方に配置されている。第２部材３２は、後述する可動鉄片４ｅに連結されている。第２部材３２は、下端部３２ａが第１部材３１に形成された図示しない鍵孔状の係止孔に係止されることで、第１部材３１から抜け止めされている。第２部材３２は、第１部材３１に対して上下方向に相対移動可能である。 The second member 32 is disposed above the first member 31. The second member 32 is connected to the movable iron piece 4e, which will be described later. The second member 32 is prevented from coming off the first member 31 by having its lower end 32a engaged with a keyhole-shaped engaging hole (not shown) formed in the first member 31. The second member 32 is movable relative to the first member 31 in the vertical direction.

接点バネ１０は、コイルバネであり、圧縮された状態で第１部材３１と第２部材３２との間に配置されている。接点バネ１０は、第１可動接点８ａの第１固定接点１２に対する接触圧、並びに第２可動接点８ｂの第２固定接点２２に対する接触圧を増大するために設けられている。接点バネ１０は、第２部材３２を開離方向に向けて付勢している。 The contact spring 10 is a coil spring, and is arranged in a compressed state between the first member 31 and the second member 32. The contact spring 10 is provided to increase the contact pressure of the first movable contact 8a against the first fixed contact 12, and the contact pressure of the second movable contact 8b against the second fixed contact 22. The contact spring 10 biases the second member 32 in the opening direction.

駆動装置４は、接点装置３の左方に配置されている。駆動装置４は、可動部材９を介して可動接触片８を上下方向に移動させる。駆動装置４は、コイル４ａと、スプール４ｂと、固定鉄心４ｃと、ヨーク４ｄと、可動鉄片４ｅと、ヒンジバネ４ｆとを含む。 The drive unit 4 is disposed to the left of the contact device 3. The drive unit 4 moves the movable contact piece 8 in the vertical direction via the movable member 9. The drive unit 4 includes a coil 4a, a spool 4b, a fixed iron core 4c, a yoke 4d, a movable iron piece 4e, and a hinge spring 4f.

コイル４ａは、スプール４ｂの外周に巻回されている。スプール４ｂは、上下方向に延びている。固定鉄心４ｃは、スプール４ｂの内周部に配置されている。本実施形態では、固定鉄心４ｃは、複数の板材を積層して形成されている。ヨーク４ｄは、コイル４ａの左方を覆うように配置されている。ヨーク４ｄは、前後方向から見て略Ｌ字状である。ヨーク４ｄは、固定鉄心４ｃの下端に接続されている。 The coil 4a is wound around the outer circumference of the spool 4b. The spool 4b extends in the vertical direction. The fixed core 4c is disposed on the inner circumference of the spool 4b. In this embodiment, the fixed core 4c is formed by stacking multiple plate materials. The yoke 4d is disposed so as to cover the left side of the coil 4a. The yoke 4d is substantially L-shaped when viewed from the front-rear direction. The yoke 4d is connected to the lower end of the fixed core 4c.

可動鉄片４ｅは、左端がヒンジバネ４ｆを介してヨーク４ｄに回動可能に支持されている。可動鉄片４ｅは、ヨーク４ｄの上端を支点として回動する。可動鉄片４ｅは、右端が可動部材９の第２部材３２に連結されている。可動鉄片４ｅは、固定鉄心４ｃの上方に配置されている。ヒンジバネ４ｆは、可動鉄片４ｅを固定鉄心４ｃから離れる方向に付勢する。ヒンジバネ４ｆは、前後方向から見て略Ｌ字状であり、ヨーク４ｄと可動鉄片４ｅとに取り付けられている。 The left end of the movable iron piece 4e is rotatably supported by the yoke 4d via the hinge spring 4f. The movable iron piece 4e rotates around the upper end of the yoke 4d as a fulcrum. The right end of the movable iron piece 4e is connected to the second member 32 of the movable member 9. The movable iron piece 4e is disposed above the fixed iron core 4c. The hinge spring 4f biases the movable iron piece 4e in a direction away from the fixed iron core 4c. The hinge spring 4f is approximately L-shaped when viewed from the front-to-rear direction, and is attached to the yoke 4d and the movable iron piece 4e.

磁石部５は、第１固定接点１２と第１可動接点８ａとの間で発生したアーク、並びに第２固定接点２２と第２可動接点８ｂとの間で発生したアークを伸長させるための磁界を第２方向（前後方向）に発生させる。磁石部５は、ケース２の周囲に配置されている。 The magnet unit 5 generates a magnetic field in the second direction (front-rear direction) to extend the arc generated between the first fixed contact 12 and the first movable contact 8a, and the arc generated between the second fixed contact 22 and the second movable contact 8b. The magnet unit 5 is arranged around the case 2.

磁石部５は、第１磁石５ａと、第２磁石５ｂと、ヨーク５ｃとを含む。第１磁石５ａ及び第２磁石５ｂは、永久磁石である。第１磁石５ａは、カバー２ｂの前面に配置されている。第１磁石５ａは、接点装置３の前方に配置されている。第２磁石５ｂは、カバー２ｂの後面に配置されている。第２磁石５ｂは、接点装置３の後方に配置されている。第２磁石５ｂは、第１磁石５ａと前後方向に異極が対向するように配置されている。本実施形態では、第１磁石５ａのＳ極がカバー２ｂの前面に面して配置され、第２磁石５ｂのＮ極がカバー２ｂの後面に面して配置されている。したがって、第１磁石５ａと第２磁石５ｂとの間には、第２磁石５ｂから第１磁石５ａに向かって磁束が流れる。ヨーク５ｃは、図１に示すように、左右方向から見て略Ｕ字形状であり、カバー２ｂに取り付けられている。ヨーク５ｃは、第１磁石５ａ及び第２磁石５ｂの外方を覆うように第１磁石５ａ及び第２磁石５ｂに接続されている。 The magnet section 5 includes a first magnet 5a, a second magnet 5b, and a yoke 5c. The first magnet 5a and the second magnet 5b are permanent magnets. The first magnet 5a is disposed on the front surface of the cover 2b. The first magnet 5a is disposed in front of the contact device 3. The second magnet 5b is disposed on the rear surface of the cover 2b. The second magnet 5b is disposed behind the contact device 3. The second magnet 5b is disposed so that the opposite poles of the first magnet 5a face each other in the front-rear direction. In this embodiment, the S pole of the first magnet 5a is disposed facing the front surface of the cover 2b, and the N pole of the second magnet 5b is disposed facing the rear surface of the cover 2b. Therefore, between the first magnet 5a and the second magnet 5b, a magnetic flux flows from the second magnet 5b to the first magnet 5a. The yoke 5c is substantially U-shaped when viewed from the left-right direction, as shown in FIG. 1, and is attached to the cover 2b. The yoke 5c is connected to the first magnet 5a and the second magnet 5b so as to cover the outside of the first magnet 5a and the second magnet 5b.

次に電磁継電器１の動作について説明する。コイル４ａに電圧が印加されていない状態では、ヒンジバネ４ｆの弾性力によって可動部材９が開離方向に押圧されており、可動接触片８は、開位置に位置している。コイル４ａに電圧が印加されて駆動装置４が励磁されると、可動鉄片４ｅが固定鉄心４ｃに吸引されて回動し、可動部材９が接触方向に押圧される。これにより、可動部材９がヒンジバネ４ｆの弾性力に抗して接触方向に移動する。可動部材９の接触方向の移動に伴い、可動接触片８が閉位置に移動する。これにより、第１可動接点８ａが第１固定接点１２に接触し、第２可動接点８ｂが第２固定接点２２に接触する。コイル４ａの電圧の印加が停止されると、可動部材９は、ヒンジバネ４ｆの弾性力によって開離方向に移動し、可動接触片８が開位置に戻る。 Next, the operation of the electromagnetic relay 1 will be described. When no voltage is applied to the coil 4a, the movable member 9 is pressed in the opening direction by the elastic force of the hinge spring 4f, and the movable contact piece 8 is located in the open position. When a voltage is applied to the coil 4a and the drive unit 4 is excited, the movable iron piece 4e is attracted to the fixed iron core 4c and rotates, and the movable member 9 is pressed in the contact direction. As a result, the movable member 9 moves in the contact direction against the elastic force of the hinge spring 4f. As the movable member 9 moves in the contact direction, the movable contact piece 8 moves to the closed position. As a result, the first movable contact 8a contacts the first fixed contact 12, and the second movable contact 8b contacts the second fixed contact 22. When the application of voltage to the coil 4a is stopped, the movable member 9 moves in the opening direction by the elastic force of the hinge spring 4f, and the movable contact piece 8 returns to the open position.

第１可動接点８ａが第１固定接点１２に接触した状態から開離するときに、第１可動接点８ａと第１固定接点１２との間にアークが発生する。以下では、第１可動接点８ａと第１固定接点１２との間で発生したアークを第１アークと呼ぶ。例えば、第１可動接点８ａから第１固定接点１２に向けて電流が流れる場合、図６に示すように、第１アークが伸長される伸長方向は、第１アークに作用するローレンツ力Ｆ１の方向であり、Ｘ２で示す方向（左方向）である。 When the first movable contact 8a is released from its contact with the first fixed contact 12, an arc is generated between the first movable contact 8a and the first fixed contact 12. Hereinafter, the arc generated between the first movable contact 8a and the first fixed contact 12 is referred to as the first arc. For example, when a current flows from the first movable contact 8a to the first fixed contact 12, as shown in FIG. 6, the extension direction of the first arc is the direction of the Lorentz force F1 acting on the first arc, which is the direction indicated by X2 (leftward).

ここで、端子延長部１３の第１延伸部１３ａは、第１アークが伸長される伸長方向（ローレンツ力Ｆ１の方向）に延びている。また、第２延伸部１３ｂは、第１延伸部１３ａから開離方向に屈曲している。このため、図６に示すように、第１アークにローレンツ力Ｆ１が作用すると、第１固定端子６を移動する第１アークの端部は、第１延伸部１３ａに移動した後、第２延伸部１３ｂによって開離方向に案内される。その結果、第１アークの端部が第２延伸部１３ｂの上端に移動したときにおいて、開離方向へのローレンツ力Ｆ２が第１アークに作用することになる。その結果、可動接触片８の裏側（上方）の空間で第１アークを伸長させることができる。また、第２延伸部１３ｂによって、第１アークが伸長される伸長方向に位置するカバー２ｂの内側面に第１アークが当たることを抑制できる。これにより、カバー２ｂの内側面が第１アークによって劣化することを抑制できる。なお、本実施形態では、ケース２内において、可動接触片８の第１可動接点８ａが配置される裏側及び第２可動接点８ｂが配置される裏側にアークを伸長させる空間が設けられている。 Here, the first extension 13a of the terminal extension 13 extends in the extension direction (the direction of the Lorentz force F1) in which the first arc is extended. The second extension 13b is bent from the first extension 13a in the opening direction. For this reason, as shown in FIG. 6, when the Lorentz force F1 acts on the first arc, the end of the first arc moving through the first fixed terminal 6 moves to the first extension 13a and is guided in the opening direction by the second extension 13b. As a result, when the end of the first arc moves to the upper end of the second extension 13b, the Lorentz force F2 in the opening direction acts on the first arc. As a result, the first arc can be extended in the space behind (above) the movable contact piece 8. In addition, the second extension 13b can prevent the first arc from hitting the inner surface of the cover 2b located in the extension direction in which the first arc is extended. This prevents the inner surface of the cover 2b from being deteriorated by the first arc. In this embodiment, a space is provided in the case 2 to extend the arc on the rear side where the first movable contact 8a of the movable contact piece 8 is disposed and on the rear side where the second movable contact 8b is disposed.

第２可動接点８ｂと第２固定接点２２との間で発生したアークには、ローレンツ力Ｆ１と反対方向のローレンツ力（右方向）が作用する。この場合、第２可動接点８ｂと第２固定接点２２との間で発生したアークは、第２固定端子７の端子延長部２４によって案内される。一方、第１可動接点８ａから第１固定接点１２に向けて電流が流れる場合は、第１アークにローレンツ力Ｆ１と反対方向のローレンツ力（右方向）が作用するため、第１アークは、第１固定端子６の端子延長部１４によって案内される。同様に、第２可動接点８ｂと第２固定接点２２との間で発生したアークは、第２固定端子７の端子延長部２３によって案内される。 The arc generated between the second movable contact 8b and the second fixed contact 22 is guided by the terminal extension 24 of the second fixed terminal 7, because a Lorentz force (rightward) opposite to the Lorentz force F1 acts on the first arc when a current flows from the first movable contact 8a to the first fixed contact 12, the first arc is guided by the terminal extension 14 of the first fixed terminal 6. Similarly, the arc generated between the second movable contact 8b and the second fixed contact 22 is guided by the terminal extension 23 of the second fixed terminal 7.

ここで、可動接触片８は、段部８１をさらに含んでもよい。段部８１は、可動接触片８を移動する第１アークの端部が前後方向における可動接触片８の中央に近づく方向に移動することを制限する。段部８１は、第１可動接点８ａと可動部材９との間に配置されている。段部８１は、図６に示すように、可動接触片８における左側の側部から第１アークに作用するローレンツ力Ｆ１の方向（左方向）に突出して形成されている。なお、段部８１は、可動接触片８における左側の側部から右方に凹む凹部によって構成されてもよい。また、本実施形態では、段部８１と同様の構成が、可動接触片８における第１可動接点８ａと可動部材９との間の右側の側部及び第２可動接点８ｂと可動部材９との間の左右の側部においても形成されている。 Here, the movable contact piece 8 may further include a step portion 81. The step portion 81 restricts the end of the first arc moving on the movable contact piece 8 from moving in a direction approaching the center of the movable contact piece 8 in the front-rear direction. The step portion 81 is disposed between the first movable contact 8a and the movable member 9. As shown in FIG. 6, the step portion 81 is formed to protrude from the left side portion of the movable contact piece 8 in the direction of the Lorentz force F1 acting on the first arc (leftward). The step portion 81 may be formed by a recess recessed to the right from the left side portion of the movable contact piece 8. In this embodiment, a configuration similar to the step portion 81 is also formed on the right side portion of the movable contact piece 8 between the first movable contact 8a and the movable member 9 and on the left and right sides between the second movable contact 8b and the movable member 9.

以上、本発明の一態様に係る電磁継電器の実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。例えば、ケース２、接点装置３、駆動装置４、或いは磁石部５の構成が変更されてもよい。 The above describes an embodiment of an electromagnetic relay according to one aspect of the present invention, but the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention. For example, the configuration of the case 2, the contact device 3, the drive device 4, or the magnet section 5 may be modified.

図８から図１２のそれぞれは、第１固定端子６の変形例を示している。なお、図８から図１２に示す第１固定端子６の変形例は、第２固定端子７に適用してもよい。図８に示すように、端子延長部１３の第２延伸部１３ｂは、可動接触片８が開位置にあるときにおいて、可動接触片８よりも開離方向（上方向）に突出していてもよい。或いは、端子延長部１３の第２延伸部１３ｂは、可動接触片８が開位置にあるときにおいて、接点支持部１１からの距離が可動接触片８と同程度であってもよい。 Each of Fig. 8 to Fig. 12 shows a modified example of the first fixed terminal 6. The modified examples of the first fixed terminal 6 shown in Fig. 8 to Fig. 12 may be applied to the second fixed terminal 7. As shown in Fig. 8, the second extension portion 13b of the terminal extension portion 13 may protrude in the opening direction (upward) beyond the movable contact piece 8 when the movable contact piece 8 is in the open position. Alternatively, the second extension portion 13b of the terminal extension portion 13 may be at a distance from the contact support portion 11 that is approximately the same as that of the movable contact piece 8 when the movable contact piece 8 is in the open position.

図９に示すように、第１固定端子６の端子延長部１３は、ホットガスの滞留を抑制するためのガス抜き孔１３ｃをさらに含んでよい。ガス抜き孔１３ｃは、貫通孔である。ガス抜き孔１３ｃは、第１延伸部１３ａと第２延伸部１３ｂとの境界に形成してもよいし、図１０に示すように、第２延伸部１３ｂに形成してもよい。或いは、ガス抜き孔１３ｃは、第１延伸部１３ａと第２延伸部１３ｂとに亘って形成してもよいし。同様に、第１固定端子６の端子延長部１４は、ガス抜き孔１３ｃをさらに含んでもよい。 As shown in FIG. 9, the terminal extension 13 of the first fixed terminal 6 may further include a gas vent hole 13c to suppress the accumulation of hot gas. The gas vent hole 13c is a through hole. The gas vent hole 13c may be formed at the boundary between the first extension 13a and the second extension 13b, or may be formed in the second extension 13b as shown in FIG. 10. Alternatively, the gas vent hole 13c may be formed across the first extension 13a and the second extension 13b. Similarly, the terminal extension 14 of the first fixed terminal 6 may further include a gas vent hole 13c.

図１１に示すように、第１固定端子６は、単一の部材で構成されてもよい。すなわち、接点支持部１１と端子延長部１３，１４と被支持部１５とが一体であってもよい。この場合においても、図１２に示すように、第２延伸部１３ｂ，１４ｂは、第２方向の寸法が徐々に小さくなる先細り形状を有していてもよい。 As shown in FIG. 11, the first fixed terminal 6 may be formed of a single member. That is, the contact support portion 11, the terminal extension portions 13 and 14, and the supported portion 15 may be integrated. Even in this case, as shown in FIG. 12, the second extension portions 13b and 14b may have a tapered shape in which the dimension in the second direction gradually decreases.

図１３は、可動接触片８の変形例を示している。図１３に示すように、可動接触片８において、第１可動接点８ａが配置される部分の第３方向の寸法Ｓ１は、第１可動接点８ａの直径以下であってもよい。第３方向は、第１方向及び第２方向と直交する方向であり、ここでは左右方向に対応する。図１３では、第１可動接点８ａが配置される部分の第３方向の寸法Ｓ１が第１可動接点８ａの直径よりもわずかに小さい例を示している。なお、第２可動接点８ｂが配置される部分の寸法についても、第２可動接点８ｂの直径以下であってもよい。また、この場合において、図１４に示すように、可動接触片８において、少なくともアークの端部が通過する可動接触片８の裏面側（Ｚ１側）の角部８ｃがＲ形状を有していてもよい。 Figure 13 shows a modified example of the movable contact piece 8. As shown in Figure 13, the dimension S1 in the third direction of the part of the movable contact piece 8 where the first movable contact 8a is arranged may be equal to or smaller than the diameter of the first movable contact 8a. The third direction is a direction perpendicular to the first and second directions, and corresponds to the left-right direction here. Figure 13 shows an example in which the dimension S1 in the third direction of the part where the first movable contact 8a is arranged is slightly smaller than the diameter of the first movable contact 8a. The dimension of the part where the second movable contact 8b is arranged may also be equal to or smaller than the diameter of the second movable contact 8b. In this case, as shown in Figure 14, at least the corner 8c on the back side (Z1 side) of the movable contact piece 8 through which the end of the arc passes may have an R shape.

１ 電磁継電器
４ 駆動装置
５ 磁石部
６ 第１固定端子
８ 可動接触片
８ａ 第１可動接点
８ｂ 第２可動接点
８ｃ 角部
１３，１４ 端子延長部
１３ａ，１３ｂ 第１延伸部
１３ｂ，１４ｂ 第２延伸部
１３ｃ，１４ｃ ガス抜き孔
８１ 段部 Reference Signs List 1 Electromagnetic relay 4 Driving device 5 Magnet portion 6 First fixed terminal 8 Movable contact piece 8a First movable contact 8b Second movable contact 8c Corner portion 13, 14 Terminal extension portion 13a, 13b First extension portion 13b, 14b Second extension portion 13c, 14c Gas vent hole 81 Step portion

Claims (8)

第１固定接点を含む第１固定端子と、
第２固定接点を含む第２固定端子と、
前記第１固定接点に向かい合う第１可動接点と前記第２固定接点に向かい合う第２可動接点とを含み、前記第１可動接点が前記第１固定接点に近づく接触方向と、前記第１可動接点が前記第１固定接点から開離する開離方向とを含む第１方向に移動可能な可動接触片と、
前記可動接触片を前記第１方向に移動させる駆動装置と、
前記第１固定接点と前記第１可動接点との間で発生したアークを伸長させるための磁界を前記可動接触片の長手方向に発生させる磁石部と、
を備え、
前記第１固定端子は、前記第１方向から見て前記可動接触片と重ならない１対の端子延長部を含み、
前記１対の端子延長部は、第１端子延長部と、前記第１端子延長部と前記可動接触片の短手方向に対向する位置に配置される第２端子延長部とを含み、
前記第１端子延長部及び前記第２端子延長部のそれぞれは、前記可動接触片の長手方向から見て前記可動接触片の短手方向に延びる第１延伸部と、前記第１延伸部から前記開離方向に屈曲した第２延伸部とを含む、
電磁継電器。 a first fixed terminal including a first fixed contact;
a second fixed terminal including a second fixed contact;
a movable contact piece including a first movable contact facing the first fixed contact and a second movable contact facing the second fixed contact, the movable contact piece being movable in a first direction including a contact direction in which the first movable contact approaches the first fixed contact and a separation direction in which the first movable contact separates from the first fixed contact;
a drive device that moves the movable contact piece in the first direction;
a magnet portion that generates a magnetic field in a longitudinal direction of the movable contact piece for extending an arc generated between the first fixed contact and the first movable contact;
Equipped with
the first fixed terminal includes a pair of terminal extensions that do not overlap with the movable contact piece when viewed from the first direction,
the pair of terminal extensions includes a first terminal extension and a second terminal extension arranged at a position facing the first terminal extension in a short side direction of the movable contact piece,
Each of the first terminal extension portion and the second terminal extension portion includes a first extension portion extending in a short direction of the movable contact piece when viewed from a long direction of the movable contact piece, and a second extension portion bent from the first extension portion in the separation direction.
Electromagnetic relay. 第１固定接点を含む第１固定端子と、
前記第１固定接点に向かい合う第１可動接点を含み、前記第１可動接点が前記第１固定接点に近づく接触方向と、前記第１可動接点が前記第１固定接点から開離する開離方向とを含む第１方向に移動可能な可動接触片と、
前記可動接触片を前記第１方向に移動させる駆動装置と、
前記第１固定接点と前記第１可動接点との間で発生したアークを伸長させるための磁界を前記第１方向と直交する第２方向に発生させる磁石部と、
を備え、
前記第１固定端子は、前記第１方向から見て前記可動接触片と重ならない端子延長部を含み、
前記第１固定端子の前記端子延長部は、前記第２方向から見て前記アークが伸長される伸長方向に延びる第１延伸部と、前記第１延伸部から前記開離方向に屈曲した第２延伸部とを含み、
前記第２延伸部は、前記第２方向の寸法が徐々に小さくなる先細り形状を有している、
電磁継電器。 a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact facing the first fixed contact, the movable contact piece being movable in a first direction including a contact direction in which the first movable contact approaches the first fixed contact and a separation direction in which the first movable contact separates from the first fixed contact;
a drive device that moves the movable contact piece in the first direction;
a magnet portion that generates a magnetic field in a second direction perpendicular to the first direction, the magnetic field being used to extend an arc generated between the first fixed contact and the first movable contact;
Equipped with
the first fixed terminal includes a terminal extension portion that does not overlap with the movable contact piece when viewed from the first direction,
the terminal extension portion of the first fixed terminal includes a first extension portion extending in an extension direction in which the arc extends as viewed from the second direction, and a second extension portion bent from the first extension portion in the separation direction,
The second extension portion has a tapered shape in which the dimension in the second direction gradually decreases.
Electromagnetic relay. 第１固定接点を含む第１固定端子と、
前記第１固定接点に向かい合う第１可動接点を含み、前記第１可動接点が前記第１固定接点に近づく接触方向と、前記第１可動接点が前記第１固定接点から開離する開離方向とを含む第１方向に移動可能な可動接触片と、
前記可動接触片を前記第１方向に移動させる駆動装置と、
前記第１固定接点と前記第１可動接点との間で発生したアークを伸長させるための磁界を前記第１方向と直交する第２方向に発生させる磁石部と、
を備え、
前記第１固定端子は、前記第１方向から見て前記可動接触片と重ならない端子延長部を含み、
前記第１固定端子の前記端子延長部は、前記第２方向から見て前記アークが伸長される伸長方向に延びる第１延伸部と、前記第１延伸部から前記開離方向に屈曲した第２延伸部とを含み、
前記可動接触片は、前記第１可動接点が前記第１固定接点に接触する閉位置と、前記第１可動接点が前記第１固定接点から開離した開位置とに移動可能であり、
前記第２延伸部は、前記可動接触片が前記開位置にあるときにおいて、前記可動接触片よりも前記開離方向に突出している、
電磁継電器。 a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact facing the first fixed contact, the movable contact piece being movable in a first direction including a contact direction in which the first movable contact approaches the first fixed contact and a separation direction in which the first movable contact separates from the first fixed contact;
a drive device that moves the movable contact piece in the first direction;
a magnet portion that generates a magnetic field in a second direction perpendicular to the first direction, the magnetic field being used to extend an arc generated between the first fixed contact and the first movable contact;
Equipped with
the first fixed terminal includes a terminal extension portion that does not overlap with the movable contact piece when viewed from the first direction,
the terminal extension portion of the first fixed terminal includes a first extension portion extending in an extension direction in which the arc extends as viewed from the second direction, and a second extension portion bent from the first extension portion in the separation direction,
the movable contact piece is movable between a closed position where the first movable contact is in contact with the first fixed contact and an open position where the first movable contact is separated from the first fixed contact,
The second extension portion protrudes in the separation direction beyond the movable contact piece when the movable contact piece is in the open position.
Electromagnetic relay. 第１固定接点を含む第１固定端子と、
前記第１固定接点に向かい合う第１可動接点を含み、前記第１可動接点が前記第１固定接点に近づく接触方向と、前記第１可動接点が前記第１固定接点から開離する開離方向とを含む第１方向に移動可能な可動接触片と、
前記可動接触片を前記第１方向に移動させる駆動装置と、
前記第１固定接点と前記第１可動接点との間で発生したアークを伸長させるための磁界を前記第１方向と直交する第２方向に発生させる磁石部と、
前記第１方向及び前記第２方向と直交する第３方向に前記第１固定接点から離れて配置された第２固定接点を含む第２固定端子と、
を備え、
前記第１固定端子は、前記第１方向から見て前記可動接触片と重ならない端子延長部を含み、
前記第１固定端子の前記端子延長部は、前記第２方向から見て前記アークが伸長される伸長方向に延びる第１延伸部と、前記第１延伸部から前記開離方向に屈曲した第２延伸部とを含み、
前記可動接触片は、前記第２固定接点に向かい合う第２可動接点と、前記アークが前記第３方向における前記可動接触片への中央に近づく方向に移動することを制限する段部とをさらに含む、
電磁継電器。 a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact facing the first fixed contact, the movable contact piece being movable in a first direction including a contact direction in which the first movable contact approaches the first fixed contact and a separation direction in which the first movable contact separates from the first fixed contact;
a drive device that moves the movable contact piece in the first direction;
a magnet portion that generates a magnetic field in a second direction perpendicular to the first direction, the magnetic field being used to extend an arc generated between the first fixed contact and the first movable contact;
a second fixed terminal including a second fixed contact disposed apart from the first fixed contact in a third direction perpendicular to the first direction and the second direction;
Equipped with
the first fixed terminal includes a terminal extension portion that does not overlap with the movable contact piece when viewed from the first direction,
the terminal extension portion of the first fixed terminal includes a first extension portion extending in an extension direction in which the arc extends as viewed from the second direction, and a second extension portion bent from the first extension portion in the separation direction,
The movable contact piece further includes a second movable contact facing the second fixed contact, and a step portion that limits movement of the arc in a direction approaching a center of the movable contact piece in the third direction.
Electromagnetic relay. 第１固定接点を含む第１固定端子と、
前記第１固定接点に向かい合う第１可動接点を含み、前記第１可動接点が前記第１固定接点に近づく接触方向と、前記第１可動接点が前記第１固定接点から開離する開離方向とを含む第１方向に移動可能な可動接触片と、
前記可動接触片を前記第１方向に移動させる駆動装置と、
前記第１固定接点と前記第１可動接点との間で発生したアークを伸長させるための磁界を前記第１方向と直交する第２方向に発生させる磁石部と、
を備え、
前記第１固定端子は、前記第１方向から見て前記可動接触片と重ならない端子延長部を含み、
前記第１固定端子の前記端子延長部は、前記第２方向から見て前記アークが伸長される伸長方向に延びる第１延伸部と、前記第１延伸部から前記開離方向に屈曲した第２延伸部と、前記第１延伸部と前記第２延伸部との境界に形成されたガス抜き孔とを含む、
電磁継電器。 a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact facing the first fixed contact, the movable contact piece being movable in a first direction including a contact direction in which the first movable contact approaches the first fixed contact and a separation direction in which the first movable contact separates from the first fixed contact;
a drive device that moves the movable contact piece in the first direction;
a magnet portion that generates a magnetic field in a second direction perpendicular to the first direction, the magnetic field being used to extend an arc generated between the first fixed contact and the first movable contact;
Equipped with
the first fixed terminal includes a terminal extension portion that does not overlap with the movable contact piece when viewed from the first direction,
the terminal extension portion of the first fixed terminal includes a first extension portion extending in an extension direction in which the arc extends as viewed from the second direction, a second extension portion bent from the first extension portion in the separation direction, and a gas vent hole formed at a boundary between the first extension portion and the second extension portion,
Electromagnetic relay. 前記第１固定端子の前記端子延長部は、前記第２延伸部に形成されたガス抜き孔をさらに含む、
請求項２から４のいずれか１項に記載の電磁継電器。 The terminal extension portion of the first fixed terminal further includes a gas vent hole formed in the second extension portion.
5. An electromagnetic relay according to claim 2. 第１固定接点を含む第１固定端子と、
前記第１固定接点に向かい合う第１可動接点を含み、前記第１可動接点が前記第１固定接点に近づく接触方向と、前記第１可動接点が前記第１固定接点から開離する開離方向とを含む第１方向に移動可能な可動接触片と、
前記可動接触片を前記第１方向に移動させる駆動装置と、
前記第１固定接点と前記第１可動接点との間で発生したアークを伸長させるための磁界を前記第１方向と直交する第２方向に発生させる磁石部と、
を備え、
前記第１固定端子は、前記第１方向から見て前記可動接触片と重ならない端子延長部を含み、
前記第１固定端子の前記端子延長部は、前記第２方向から見て前記アークが伸長される伸長方向に延びる第１延伸部と、前記第１延伸部から前記開離方向に屈曲した第２延伸部とを含み、
前記可動接触片は、前記第１可動接点が配置される部分における前記伸長方向と平行な方向の寸法が、前記第１可動接点の直径以下である、
電磁継電器。 a first fixed terminal including a first fixed contact;
a movable contact piece including a first movable contact facing the first fixed contact, the movable contact piece being movable in a first direction including a contact direction in which the first movable contact approaches the first fixed contact and a separation direction in which the first movable contact separates from the first fixed contact;
a drive device that moves the movable contact piece in the first direction;
a magnet portion that generates a magnetic field in a second direction perpendicular to the first direction, the magnetic field being used to extend an arc generated between the first fixed contact and the first movable contact;
Equipped with
the first fixed terminal includes a terminal extension portion that does not overlap with the movable contact piece when viewed from the first direction,
the terminal extension portion of the first fixed terminal includes a first extension portion extending in an extension direction in which the arc extends as viewed from the second direction, and a second extension portion bent from the first extension portion in the separation direction,
a dimension of the movable contact piece in a direction parallel to the extension direction at a portion where the first movable contact is disposed is equal to or smaller than a diameter of the first movable contact;
Electromagnetic relay. 前記可動接触片は、前記第１可動接点が配置される側と反対側かつ前記アークが通過する角部を含み、
前記角部は、Ｒ形状を有している、
請求項７に記載の電磁継電器。
 the movable contact piece includes a corner portion opposite to a side on which the first movable contact is disposed and through which the arc passes,
The corner portion has an R shape.
8. An electromagnetic relay according to claim 7.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002352653A (en) 2001-05-29 2002-12-06 Mitsubishi Electric Corp Arc-extinguishing mechanism for switching device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002352653A (en) 2001-05-29 2002-12-06 Mitsubishi Electric Corp Arc-extinguishing mechanism for switching device

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