JP2021174635A - Electromagnetic relay - Google Patents

Abstract

To improve, in an electromagnetic relay, heat dissipation of a movable contact piece while suppressing an increase in the weight of the movable contact piece.SOLUTION: An electromagnetic relay comprises a first fixed terminal, a movable contact piece, a movable mechanism, a driving device, and a first heat dissipation member. The first fixed terminal includes a first fixed contact. The movable contact piece includes a first movable contact which can come into contact with the first fixed contact. The movable mechanism moves the movable contact piece to: a contact position where the first movable contact comes into contact with the first fixed contact; and a separated position where the first movable contact is separated from the first fixed contact. The driving device actuates the movable mechanism with electromagnetic force. When the movable contact piece is located at the separated position, the first heat dissipation member does not come into contact with the movable contact piece, but when the movable contact piece is located at the contact position, it comes into contact with the movable contact piece so as to dissipate heat generated in the movable contact piece.SELECTED DRAWING: Figure 1

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において、通電容量を増加させるために、可動接触片に導電補助部材を取り付けた電磁継電器が知られている（特許文献１参照）。導電補助部材は、可動接触片の発熱を抑制する部材としても機能している。 Conventionally, in an electromagnetic relay that opens and closes an electric circuit, an electromagnetic relay in which a conductive auxiliary member is attached to a movable contact piece in order to increase the energization capacity is known (see Patent Document 1). The conductive auxiliary member also functions as a member that suppresses heat generation of the movable contact piece.

特開２０１５−１９１８５７号公報JP 2015-191857

特許文献１の電磁継電器では、可動接触片に導電補助部材が取り付けられているため、可動接触片の重量が重くなり、耐衝撃性や耐振動性が弱くなる。また、可動接触片の重量が重くなると、可動接触片を可動させるための磁気吸引力を大きくする必要があり、磁気吸引力を発生させる装置が大型化するおそれがある。 In the electromagnetic relay of Patent Document 1, since the conductive auxiliary member is attached to the movable contact piece, the weight of the movable contact piece becomes heavy, and the impact resistance and the vibration resistance become weak. Further, when the weight of the movable contact piece becomes heavy, it is necessary to increase the magnetic attraction force for moving the movable contact piece, and there is a possibility that the device for generating the magnetic attraction force becomes large.

本発明の課題は、電磁継電器において、可動接触片の重量の増加を抑えつつ、可動接触片の放熱性の向上を図ることにある。 An object of the present invention is to improve the heat dissipation of a movable contact piece while suppressing an increase in the weight of 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、可動機構と、駆動装置と、第１放熱部材とを備える。第１固定端子は、第１固定接点を含む。可動接触片は、第１固定接点に接触可能な第１可動接点を含む。可動機構は、第１可動接点が第１固定接点に接触する接触位置と第１可動接点が第１固定接点から開離する開離位置とに可動接触片を移動させる。駆動装置は、電磁力によって可動機構を作動させる。第１放熱部材は、可動接触片が開離位置にあるときに可動接触片に接触せずに、可動接触片が接触位置にあるときに可動接触片に接触して可動接触片の発熱を放熱する。 The electromagnetic relay according to one aspect of the present invention includes a first fixed terminal, a movable contact piece, a movable mechanism, a driving device, and a first heat radiating member. The first fixed terminal includes a first fixed contact. The movable contact piece includes a first movable contact that can contact the first fixed contact. The movable mechanism moves the movable contact piece to a contact position where the first movable contact contacts the first fixed contact and an opening position where the first movable contact separates from the first fixed contact. The drive device operates the movable mechanism by electromagnetic force. The first heat radiating member does not contact the movable contact piece when the movable contact piece is in the open position, but contacts the movable contact piece when the movable contact piece is in the contact position to dissipate heat generated by the movable contact piece. do.

この電磁継電器では、可動接触片が開離位置にあるときに、第１放熱部材は可動接触片に接触しない。一方、可動接触片が接触位置にあるときに、第１放熱部材は、可動接触片に接触して可動接触片の発熱を放熱する。これにより、可動接触片の重量の増加を抑えつつ、可動接触片の放熱性の向上を図ることができる。 In this electromagnetic relay, the first heat radiating member does not come into contact with the movable contact piece when the movable contact piece is in the open position. On the other hand, when the movable contact piece is in the contact position, the first heat radiating member contacts the movable contact piece and dissipates heat generated by the movable contact piece. As a result, it is possible to improve the heat dissipation of the movable contact piece while suppressing the increase in the weight of the movable contact piece.

第１放熱部材は、第１可動接点が第１固定接点に接触する前に可動接触片に接触してもよい。この場合は、放熱部材を可動接触片に確実に接触させることができる。 The first heat radiating member may come into contact with the movable contact piece before the first movable contact comes into contact with the first fixed contact. In this case, the heat radiating member can be reliably brought into contact with the movable contact piece.

第１放熱部材は、第１可動接点が第１固定接点に接触する方向に撓んでもよい。この場合は、可動接触片が放熱部材に接触したときに、可動接触片によって放熱部材を接触位置に向けて移動させることができる。 The first heat radiating member may bend in the direction in which the first movable contact contacts the first fixed contact. In this case, when the movable contact piece comes into contact with the heat radiating member, the movable contact piece can move the heat radiating member toward the contact position.

電磁継電器は、第１固定接点及び第１可動接点を収容するケースをさらに備えてもよい。第１放熱部材は、ケースから外部に露出してもよい。この場合は、可動接触片の放熱性の向上をさらに図ることができる。 The electromagnetic relay may further include a case accommodating a first fixed contact and a first movable contact. The first heat radiating member may be exposed to the outside from the case. In this case, the heat dissipation of the movable contact piece can be further improved.

電磁継電器は、第１固定接点及び第１可動接点を収容するケースと、ケース内に磁界を発生させる永久磁石と、永久磁石に接続されるヨークとをさらに備えてもよい。第１放熱部材は、ヨークに接触して配置されてもよい。この場合は、放熱部材を介して可動接触片の発熱をヨークから放熱できる。 The electromagnetic relay may further include a case accommodating a first fixed contact and a first movable contact, a permanent magnet that generates a magnetic field in the case, and a yoke connected to the permanent magnet. The first heat radiating member may be arranged in contact with the yoke. In this case, the heat generated by the movable contact piece can be dissipated from the yoke via the heat radiating member.

第１放熱部材は、可動接触片と同じ材料又は可動接触片よりも熱伝導率の高い材料からなってもよい。この場合は、可動接触片の放熱性の向上をさらに図ることができる。 The first heat radiating member may be made of the same material as the movable contact piece or a material having a higher thermal conductivity than the movable contact piece. In this case, the heat dissipation of the movable contact piece can be further improved.

第１放熱部材は、本体部と、前記本体部から前記可動接触片に向かって突出する接点部とを含んでもよい。接点部は、可動接触片が接触位置にあるときに可動接触片に接触してもよい。この場合は、可動接触片と第１放熱部材との接触が安定する。 The first heat radiating member may include a main body portion and a contact portion protruding from the main body portion toward the movable contact piece. The contact portion may come into contact with the movable contact piece when the movable contact piece is in the contact position. In this case, the contact between the movable contact piece and the first heat radiating member is stable.

電磁継電器は、絶縁壁をさらに備えてもよい。絶縁壁は、第１放熱部材の周囲に設けられ、第１固定接点と第１可動接点との間で生じたアークから第１放熱部材を保護する。この場合は、接点間で発生するアークから第１放熱部材を保護することができる。 The electromagnetic relay may further include an insulating wall. The insulating wall is provided around the first heat radiating member and protects the first heat radiating member from the arc generated between the first fixed contact and the first movable contact. In this case, the first heat radiating member can be protected from the arc generated between the contacts.

電磁継電器は、第２固定端子をさらに備えてもよい。第２固定端子は、２固定接点を含み、第１固定端子と間隔を隔てて配置されてもよい。可動接触片は、第２固定接点に接触可能な第２可動接点を含んでもよい。第２可動接点は、可動接触片が接触位置にあるときに第２固定接点に接触し、可動接触片が開離位置にあるときに第２固定接点から開離してもよい。放熱部材２１は、導電性であり、可動接触片が接触位置にあるときに可動接触片に接触する第１接触部と、第１接触部から離れた位置に配置され可動接触片が接触位置にあるときに可動接触片に接触する第２接触部とを含んでもよい。第１接触部及び第２接触部は、第１可動接点と第２可動接点との間に配置されてもよい。この場合は、放熱部材が電路としても機能するので、電路が増加するとともに、可動接触片の発熱をさらに抑制することができる。 The electromagnetic relay may further include a second fixed terminal. The second fixed terminal may include two fixed contacts and may be spaced apart from the first fixed terminal. The movable contact piece may include a second movable contact that can contact the second fixed contact. The second movable contact may come into contact with the second fixed contact when the movable contact piece is in the contact position and may be separated from the second fixed contact when the movable contact piece is in the open position. The heat radiating member 21 is conductive, and is arranged at a position away from the first contact portion and the first contact portion that comes into contact with the movable contact piece when the movable contact piece is in the contact position, and the movable contact piece is in the contact position. It may include a second contact portion that comes into contact with the movable contact piece at some time. The first contact portion and the second contact portion may be arranged between the first movable contact and the second movable contact. In this case, since the heat radiating member also functions as an electric path, the number of electric paths can be increased and the heat generation of the movable contact piece can be further suppressed.

電磁継電器は、第２固定端子をさらに備えてもよい。第２固定端子は、２固定接点を含み、第１固定端子と間隔を隔てて配置されてもよい。可動接触片は、第２固定接点に接触可能な第２可動接点を含んでもよい。第２可動接点は、可動接触片が接触位置にあるときに第２固定接点に接触し、可動接触片が開離位置にあるときに第２固定接点から開離してもよい。第１放熱部材は、第１可動接点及び第２可動接点のいずれか一方に偏倚した位置に配置されてもよい。この場合は、一方の接点同士を他方の接点同士よりも先に接触又は開離させることができる。 The electromagnetic relay may further include a second fixed terminal. The second fixed terminal may include two fixed contacts and may be spaced apart from the first fixed terminal. The movable contact piece may include a second movable contact that can contact the second fixed contact. The second movable contact may come into contact with the second fixed contact when the movable contact piece is in the contact position and may be separated from the second fixed contact when the movable contact piece is in the open position. The first heat radiating member may be arranged at a position deviated from either the first movable contact or the second movable contact. In this case, one contact can be brought into contact with or separated from the other contact.

電磁継電器は、第２放熱部材をさらに備えてもよい。第２放熱部材は、第１放熱部材と間隔を隔てて配置され、可動接触片が開離位置にあるときに可動接触片に接触せずに、可動接触片が接触位置にあるときに可動接触片に接触して可動接触片の発熱を放熱してもよい。第２放熱部材は、第１放熱部材が可動接触片に接触する前に可動接触片に接触してもよい。この場合は、可動接触片の放熱性の向上をさらに図ることができるとともに、一方の接点同士を他方の接点同士よりも先に接触又は開離させることができる。 The electromagnetic relay may further include a second heat radiating member. The second heat radiating member is arranged at a distance from the first heat radiating member, and does not contact the movable contact piece when the movable contact piece is in the open position, but does not contact the movable contact piece when the movable contact piece is in the contact position. The heat generated by the movable contact piece may be dissipated by contacting the piece. The second heat radiating member may come into contact with the movable contact piece before the first heat radiating member comes into contact with the movable contact piece. In this case, the heat dissipation of the movable contact piece can be further improved, and one contact can be brought into contact with or separated from the other contact before the other contact.

本発明によれば、電磁継電器において、可動接触片の重量の増加を抑えつつ、可動接触片の放熱性の向上を図ることができる。 According to the present invention, in an electromagnetic relay, it is possible to improve the heat dissipation of the movable contact piece while suppressing an increase in the weight of the movable contact piece.

電磁継電器の内部を前方から見た模式図である。It is a schematic diagram which looked at the inside of an electromagnetic relay from the front. 接点装置を右方から見た模式図である。It is a schematic diagram which looked at the contact device from the right side. （Ａ）は可動接触片が開離位置にあるときの接点装置を前方から見た模式図である。（Ｂ）は可動接触片が接触位置にあるときの接点装置を前方から見た模式図である。(A) is a schematic view of the contact device when the movable contact piece is in the open position, as viewed from the front. (B) is a schematic view of the contact device when the movable contact piece is in the contact position as viewed from the front. 変形例に係る電磁継電器の接点装置を右方から見た模式図である。It is a schematic diagram which looked at the contact device of the electromagnetic relay which concerns on a modification from the right side. 変形例に係る電磁継電器の接点装置を右方から見た模式図である。It is a schematic diagram which looked at the contact device of the electromagnetic relay which concerns on a modification from the right side. 変形例に係る電磁継電器の内部を上方から見た模式図である。It is a schematic diagram which looked at the inside of the electromagnetic relay which concerns on a modification from above. 変形例に係る電磁継電器の接点装置を右方から見た模式図である。It is a schematic diagram which looked at the contact device of the electromagnetic relay which concerns on a modification from the right side. 変形例に係る電磁継電器の接点装置を前方から見た模式図である。It is a schematic diagram which looked at the contact device of the electromagnetic relay which concerns on a modification from the front. 変形例に係る電磁継電器の接点装置周辺の断面模式図である。It is sectional drawing around the contact device of the electromagnetic relay which concerns on a modification. （Ａ）は変形例において、可動接触片が開離位置のあるときの接点装置を左方から見た模式図である。（Ｂ）は変形例において、可動接触片が接触位置にあるときの接点装置を左方から見た模式図である。(A) is a schematic view of the contact device when the movable contact piece is in the open position in the modified example, as viewed from the left. (B) is a schematic view of a contact device viewed from the left when the movable contact piece is in the contact position in the modified example. 変形例に係る電磁継電器の接点装置周辺の断面模式図である。It is sectional drawing around the contact device of the electromagnetic relay which concerns on a modification. 変形例に係る電磁継電器の接点装置周辺の断面模式図である。It is sectional drawing around the contact device of the electromagnetic relay which concerns on a modification. 変形例に係る電磁継電器の接点装置周辺の断面模式図である。It is sectional drawing around the contact device of the electromagnetic relay which concerns on a modification. 変形例に係る電磁継電器の接点装置を左方から見た模式図である。It is a schematic diagram which looked at the contact device of the electromagnetic relay which concerns on a modification from the left. 変形例に係る電磁継電器の内部を上方から見た模式図である。It is a schematic diagram which looked at the inside of the electromagnetic relay which concerns on a modification from above. 変形例に係る電磁継電器の接点装置を右方から見た模式図である。It is a schematic diagram which looked at the contact device of the electromagnetic relay which concerns on a modification from the right side. 変形例に係る電磁継電器の接点装置を前方から見た模式図である。It is a schematic diagram which looked at the contact device of the electromagnetic relay which concerns on a modification from the front.

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。図面を参照するときにおいて、説明を分かり易くするために図１及び図９における上側を「上」、下側を「下」、左側を「左」、右側を「右」、紙面の手前側を「前」、紙面の奥側を「後」として説明する。図１は電磁継電器１００の内部を前方から見た模式図である。 Hereinafter, embodiments of an electromagnetic relay according to one aspect of the present invention will be described with reference to the drawings. When referring to the drawings, in order to make the explanation easier to understand, the upper side in FIGS. 1 and 9 is "upper", the lower side is "lower", the left side is "left", the right side is "right", and the front side of the paper is. The "front" and the back side of the page are described as "rear". FIG. 1 is a schematic view of the inside of the electromagnetic relay 100 as viewed from the front.

電磁継電器１００は、いわゆるヒンジ型の電磁継電器である。電磁継電器１００は、ケース２と、接点装置３と、駆動装置４とを備えている。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、ベース２ａと、カバー２ｂとを含む。 The electromagnetic relay 100 is a so-called hinge type electromagnetic relay. The electromagnetic relay 100 includes a case 2, a contact device 3, and a drive device 4. The case 2 is made of an insulating material such as resin. The case 2 includes a base 2a and a cover 2b.

ベース２ａは、接点装置３と駆動装置４とを支持する。カバー２ｂは、下方に向けて開口する箱型の部材であり、ベース２ａを上方から覆うようにベース２ａに固定されている。 The base 2a supports the contact device 3 and the drive device 4. The cover 2b is a box-shaped member that opens downward, and is fixed to the base 2a so as to cover the base 2a from above.

図２は、接点装置３を右方から見た模式図である。接点装置３は、ベース２ａに支持されている。接点装置３は、ケース２に収容されている。接点装置３は、固定端子６と、固定端子７と、可動接触片１０と、可動機構１１と、を含む。固定端子６，７及び可動接触片１０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。固定端子６，７及び可動接触片１０は、上下方向に延びており、ベース２ａに圧入固定されている。 FIG. 2 is a schematic view of the contact device 3 as viewed from the right. The contact device 3 is supported by the base 2a. The contact device 3 is housed in the case 2. The contact device 3 includes a fixed terminal 6, a fixed terminal 7, a movable contact piece 10, and a movable mechanism 11. The fixed terminals 6 and 7 and the movable contact piece 10 are plate-shaped terminals and are made of a conductive material such as copper. The fixed terminals 6 and 7 and the movable contact piece 10 extend in the vertical direction and are press-fitted and fixed to the base 2a.

固定端子６は、一部がケース２内に配置される。固定端子６は、固定接点６ａと、外部接続部６ｂとを含む。固定接点６ａは、ケース２内に配置されている。外部接続部６ｂは、ケース２から外部に突出しており、図示しない外部機器と電気的に接続される。 A part of the fixed terminal 6 is arranged in the case 2. The fixed terminal 6 includes a fixed contact 6a and an external connection portion 6b. The fixed contact 6a is arranged in the case 2. The external connection portion 6b projects outward from the case 2 and is electrically connected to an external device (not shown).

固定端子７は、固定端子６と同様の形状である。固定端子７は、一部がケース２内に配置される。固定端子７は、固定端子６と前後方向に間隔を隔てて配置されている。固定端子７は、固定接点７ａと、図示しない外部接続部とを含む。固定接点７ａは、ケース２内に配置されている。外部接続部は、ケース２から外部に突出しており、図示しない外部機器と電気的に接続される。 The fixed terminal 7 has the same shape as the fixed terminal 6. A part of the fixed terminal 7 is arranged in the case 2. The fixed terminal 7 is arranged at a distance from the fixed terminal 6 in the front-rear direction. The fixed terminal 7 includes a fixed contact 7a and an external connection portion (not shown). The fixed contact 7a is arranged in the case 2. The external connection portion projects outward from the case 2 and is electrically connected to an external device (not shown).

可動接触片１０は、弾性変形可能な板バネで構成されている。可動接触片１０は、可動接点１０ａと、可動接点１０ｂと、脚部１０ｃと、脚部１０ｄと、連結部１０ｅとを含む。可動接点１０ａは、脚部１０ｃに配置されている。可動接点１０ａは、固定接点６ａに接触可能である。可動接点１０ｂは、脚部１０ｄに配置されている。可動接点１０ｂは、固定接点７ａに接触可能である。可動接点１０ｂは、可動接点１０ａと前後方向に間隔を隔てて配置されている。脚部１０ｃは、固定端子６と左右方向に対向して配置されている。脚部１０ｄは、固定端子７と左右方向に対向して配置されている。連結部１０ｅは、脚部１０ｃの上端から脚部１０ｄの上端に向かって前後方向に延びており、脚部１０ｃと脚部１０ｄとを連結する。 The movable contact piece 10 is composed of an elastically deformable leaf spring. The movable contact piece 10 includes a movable contact 10a, a movable contact 10b, a leg portion 10c, a leg portion 10d, and a connecting portion 10e. The movable contact 10a is arranged on the leg portion 10c. The movable contact 10a can come into contact with the fixed contact 6a. The movable contact 10b is arranged on the leg portion 10d. The movable contact 10b can contact the fixed contact 7a. The movable contact 10b is arranged at a distance from the movable contact 10a in the front-rear direction. The leg portion 10c is arranged so as to face the fixed terminal 6 in the left-right direction. The leg portion 10d is arranged so as to face the fixed terminal 7 in the left-right direction. The connecting portion 10e extends in the front-rear direction from the upper end of the leg portion 10c toward the upper end of the leg portion 10d, and connects the leg portion 10c and the leg portion 10d.

可動機構１１は、カード部材１１ａを含む。カード部材１１ａは、左右方向に回動可能にベース２ａに支持されている。カード部材１１ａは、可動接触片１０と駆動装置４との間に配置されている。カード部材１１ａは、可動接触片１０と駆動装置４に接続されている。 The movable mechanism 11 includes a card member 11a. The card member 11a is supported by the base 2a so as to be rotatable in the left-right direction. The card member 11a is arranged between the movable contact piece 10 and the drive device 4. The card member 11a is connected to the movable contact piece 10 and the drive device 4.

図３（Ａ）及び図３（Ｂ）は、接点装置３を前方から見た模式図である。可動機構１１は、可動接点１０ａ，１０ｂが固定接点６ａ，７ａに接触する接触方向Ｚ１と開離する開離方向Ｚ２とに可動接触片１０を移動させる。詳細には、可動機構１１は、図３（Ａ）に示す可動接点１０ａ，１０ｂが固定接点６ａ，７ａから開離する開離位置と、図３（Ｂ）に示す可動接点１０ａ，１０ｂが固定接点６ａ，７ａに接触する接触位置とに可動接触片１０を移動させる。本実施形態における可動接触片１０の移動方向は、左右方向と一致する。 3 (A) and 3 (B) are schematic views of the contact device 3 as viewed from the front. The movable mechanism 11 moves the movable contact piece 10 in the contact direction Z1 in which the movable contacts 10a and 10b come into contact with the fixed contacts 6a and 7a and in the opening direction Z2 in which the movable contacts 10a and 10b are separated. Specifically, in the movable mechanism 11, the movable contacts 10a and 10b shown in FIG. 3 (A) are separated from the fixed contacts 6a and 7a, and the movable contacts 10a and 10b shown in FIG. 3 (B) are fixed. The movable contact piece 10 is moved to the contact position where the contacts 6a and 7a are in contact with each other. The moving direction of the movable contact piece 10 in the present embodiment coincides with the left-right direction.

駆動装置４は、電磁力によって可動機構１１を作動させる。詳細には、駆動装置４は、電磁力によってカード部材１１ａを回動させることによって、可動接触片１０を接触位置と開離位置とに移動させる。 The drive device 4 operates the movable mechanism 11 by an electromagnetic force. Specifically, the drive device 4 moves the movable contact piece 10 between the contact position and the open / detached position by rotating the card member 11a by an electromagnetic force.

駆動装置４は、ベース２ａに支持されている。駆動装置４は、コイル４ａと、可動鉄片４ｂ、ヨーク４ｃと、鉄心４ｄとを含む。可動鉄片４ｂは、ヨーク４ｃに支持されている。コイル４ａに電圧が印加されて励磁されると、可動鉄片４ｂが鉄心４ｄに吸引されて回動し、可動鉄片４ｂがカード部材１１ａを押圧する。カード部材１１ａが可動鉄片４ｂに押圧されることで、可動接触片１０が接触方向Ｚ１に押圧される。これにより、可動接触片１０が接触位置に移動して可動接点１０ａ，１０ｂが固定接点６ａ，７ａに接触する。なお、図１では、コイル４ａに電圧が印加された状態、すなわち、可動接触片１０が接触位置にあるときを示している。 The drive device 4 is supported by the base 2a. The drive device 4 includes a coil 4a, a movable iron piece 4b, a yoke 4c, and an iron core 4d. The movable iron piece 4b is supported by the yoke 4c. When a voltage is applied to the coil 4a to excite it, the movable iron piece 4b is attracted to the iron core 4d and rotates, and the movable iron piece 4b presses the card member 11a. When the card member 11a is pressed against the movable iron piece 4b, the movable contact piece 10 is pressed in the contact direction Z1. As a result, the movable contact piece 10 moves to the contact position, and the movable contacts 10a and 10b come into contact with the fixed contacts 6a and 7a. Note that FIG. 1 shows a state in which a voltage is applied to the coil 4a, that is, a state in which the movable contact piece 10 is in the contact position.

電磁継電器１００は、放熱部材２１をさらに備えている。放熱部材２１は、可動接触片１０と同じ材料又は可動接触片１０よりも熱伝導率の高い材料からなる。本実施形態における可動接触片１０は、銅やアルミなどの導電性のある弾性変形可能な板バネで構成されている。 The electromagnetic relay 100 further includes a heat radiating member 21. The heat radiating member 21 is made of the same material as the movable contact piece 10 or a material having a higher thermal conductivity than the movable contact piece 10. The movable contact piece 10 in the present embodiment is made of a conductive elastically deformable leaf spring such as copper or aluminum.

放熱部材２１は、ベース２ａに圧入固定されている。放熱部材２１は、図２に示すように、固定端子６と固定端子７の間に配置されている。放熱部材２１は、図１に示すように、一部がケース２から外部に露出する。本実施形態では、放熱部材２１の下端がベース２ａから下方に突出している。なお、放熱部材２１は、必ずしもケース２から外部に露出する必要はない。 The heat radiating member 21 is press-fitted and fixed to the base 2a. As shown in FIG. 2, the heat radiating member 21 is arranged between the fixed terminals 6 and the fixed terminals 7. As shown in FIG. 1, a part of the heat radiating member 21 is exposed to the outside from the case 2. In the present embodiment, the lower end of the heat radiating member 21 projects downward from the base 2a. The heat radiating member 21 does not necessarily have to be exposed to the outside from the case 2.

放熱部材２１は、可動接触片１０が開離位置にあるときに可動接触片１０に接触しない。放熱部材２１は、可動接触片１０が接触位置にあるときに可動接触片１０に接触して可動接触片１０の発熱を放熱する。詳細には、図３（Ａ）に示すように、放熱部材２１は、可動接触片１０が開離位置のときに、可動接触片１０から離れた位置に配置されている。図３（Ｂ）に示すように、放熱部材２１は、可動接触片１０が接触位置にあるときに可動接触片１０に接触して可動接触片１０の発熱を放熱する。放熱部材２１は、可動接触片１０が接触位置にあるときに、先端側が可動接触片１０の連結部１０ｅに接触する。図２に示すように、放熱部材２１は、左右方向における可動接点１０ａと可動接点１０ｂとの中央位置において、可動接触片１０に接触する。なお、放熱部材２１は、固定端子６，７から離れた位置に配置されており、固定端子６，７に接触しない。 The heat radiating member 21 does not come into contact with the movable contact piece 10 when the movable contact piece 10 is in the open position. The heat radiating member 21 contacts the movable contact piece 10 when the movable contact piece 10 is in the contact position to dissipate heat generated by the movable contact piece 10. Specifically, as shown in FIG. 3A, the heat radiating member 21 is arranged at a position away from the movable contact piece 10 when the movable contact piece 10 is in the open position. As shown in FIG. 3B, the heat radiating member 21 contacts the movable contact piece 10 when the movable contact piece 10 is in the contact position to dissipate heat generated by the movable contact piece 10. When the movable contact piece 10 is in the contact position, the heat radiating member 21 comes into contact with the connecting portion 10e of the movable contact piece 10 on the tip end side. As shown in FIG. 2, the heat radiating member 21 contacts the movable contact piece 10 at the central position of the movable contact 10a and the movable contact 10b in the left-right direction. The heat radiating member 21 is arranged at a position away from the fixed terminals 6 and 7, and does not come into contact with the fixed terminals 6 and 7.

放熱部材２１は、可動接点１０ａ，１０ｂが固定接点６ａ，７ａに接触する方向に撓む。詳細には、放熱部材２１は、可動接触片１０に押圧されて、可動接触片１０と同じ方向に撓む。放熱部材２１は、可動接点１０ａ，１０ｂが固定接点６ａ，７ａに接触する前に可動接触片１０に接触するように構成されている。すなわち、放熱部材２１は、可動接触片１０が開離位置から接触位置に移動する途中で可動接触片１０に接触する。したがって、放熱部材２１は、可動接触片１０に接触方向Ｚ１に押圧される。可動接触片１０が開離位置にあるときにおいて、可動接触片１０から放熱部材２１までの間隔は、可動接点１０ａ，１０ｂから固定接点６ａ，７ａまでの間隔よりも小さい。 The heat radiating member 21 bends in the direction in which the movable contacts 10a and 10b come into contact with the fixed contacts 6a and 7a. Specifically, the heat radiating member 21 is pressed by the movable contact piece 10 and bends in the same direction as the movable contact piece 10. The heat radiating member 21 is configured so that the movable contacts 10a and 10b come into contact with the movable contact piece 10 before they come into contact with the fixed contacts 6a and 7a. That is, the heat radiating member 21 comes into contact with the movable contact piece 10 while the movable contact piece 10 is moving from the open position to the contact position. Therefore, the heat radiating member 21 is pressed against the movable contact piece 10 in the contact direction Z1. When the movable contact piece 10 is in the open position, the distance between the movable contact piece 10 and the heat radiating member 21 is smaller than the distance between the movable contacts 10a and 10b and the fixed contacts 6a and 7a.

上述した電磁継電器１００では、可動接触片１０が開離位置にあるときに、放熱部材２１は可動接触片１０に接触しない。一方、可動接触片１０が接触位置にあるときに、放熱部材２１は、可動接触片１０に接触して可動接触片１０の発熱を放熱する。これにより、可動接触片１０の重量の増加を抑えつつ、可動接触片１０の放熱性の向上を図ることができる。 In the electromagnetic relay 100 described above, the heat radiating member 21 does not come into contact with the movable contact piece 10 when the movable contact piece 10 is in the open position. On the other hand, when the movable contact piece 10 is in the contact position, the heat radiating member 21 contacts the movable contact piece 10 to dissipate heat generated by the movable contact piece 10. As a result, it is possible to improve the heat dissipation of the movable contact piece 10 while suppressing an increase in the weight of the movable contact piece 10.

また、放熱部材２１が可動接点１０ａ，１０ｂが固定接点６ａ，７ａに接触する前に可動接触片１０に接触するので、放熱部材２１を可動接触片１０に確実に接触させることができる。また、放熱部材２１の一部がケース２から外部に露出する場合は、可動接触片１０の放熱性の向上をさらに図ることができる。 Further, since the heat radiating member 21 comes into contact with the movable contact piece 10 before the movable contacts 10a and 10b come into contact with the fixed contacts 6a and 7a, the heat radiating member 21 can be reliably brought into contact with the movable contact piece 10. Further, when a part of the heat radiating member 21 is exposed to the outside from the case 2, the heat radiating property of the movable contact piece 10 can be further improved.

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、駆動装置４の構成が変更されてもよい。ケース２、接点装置３、可動機構１１及び放熱部材２１の形状、或いは配置が変更されてもよい。放熱部材２１は、２つ以上設けられてもよい。 Although the embodiment of the electromagnetic relay according to one aspect of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention. For example, the configuration of the drive device 4 may be changed. The shapes or arrangements of the case 2, the contact device 3, the movable mechanism 11, and the heat radiating member 21 may be changed. Two or more heat radiating members 21 may be provided.

放熱部材２１は、可動接触片１０よりも熱伝導率の低い材料で形成されていてもよい。放熱部材２１は、樹脂などの絶縁材で形成されていてもよい。放熱部材２１の材料に樹脂を使用した場合は、消弧ガスが期待できる。放熱部材２１は、例えばインサート成形により、樹脂に金属が組み込まれて形成されてもよい。放熱部材２１は、必ずしもバネ性を有していなくてもよい。 The heat radiating member 21 may be made of a material having a lower thermal conductivity than the movable contact piece 10. The heat radiating member 21 may be formed of an insulating material such as resin. When resin is used as the material of the heat radiating member 21, arc extinguishing gas can be expected. The heat radiating member 21 may be formed by incorporating a metal into the resin, for example, by insert molding. The heat radiating member 21 does not necessarily have to have a spring property.

放熱部材２１は、必ずしも可動接点１０ａ，１０ｂが固定接点６ａ，７ａに接触する前に可動接触片１０に接触しなくてもよい。また、放熱部材２１は、可動接触片１０と接触する部分において、冷却効果のある部材が取り付けられていてもよい。 The heat radiating member 21 does not necessarily have to come into contact with the movable contact piece 10 before the movable contacts 10a and 10b come into contact with the fixed contacts 6a and 7a. Further, the heat radiating member 21 may be attached with a member having a cooling effect at a portion in contact with the movable contact piece 10.

図４は、第１変形例に係る電磁継電器１００の接点装置３を右方から見た模式図である。図４に示すように、放熱部材２１は、ケース２のカバー２ｂに支持されていてもよい。また、可動接触片１０は、前方から見て略Ｔ字状に形成されてもよい。 FIG. 4 is a schematic view of the contact device 3 of the electromagnetic relay 100 according to the first modification as viewed from the right. As shown in FIG. 4, the heat radiating member 21 may be supported by the cover 2b of the case 2. Further, the movable contact piece 10 may be formed in a substantially T shape when viewed from the front.

図５は、第２変形例に係る電磁継電器１００の接点装置３を右方から見た模式図である。放熱部材２１は、可動接点１０ａ及び可動接点１０ｂのいずれか一方に偏倚した位置に配置されてもよい。この場合は、一方の接点同士を他方の接点同士よりも先に接触又は開離させることができる。図５では、放熱部材２１が可動接点１０ｂ側に偏倚した位置に配置されている。この場合は、例えば、可動接点１０ｂと固定接点７ａとが接触する前に、可動接点１０ａと固定接点６ａとを接触させることができる。なお、カード部材１１ａは、可動接点１０ａ及び可動接点１０ｂに対して接触方向Ｚ１に均等な押圧力が加わるように構成されている。 FIG. 5 is a schematic view of the contact device 3 of the electromagnetic relay 100 according to the second modification as viewed from the right. The heat radiating member 21 may be arranged at a position deviated from either the movable contact 10a or the movable contact 10b. In this case, one contact can be brought into contact with or separated from the other contact. In FIG. 5, the heat radiating member 21 is arranged at a position deviated toward the movable contact 10b side. In this case, for example, the movable contact 10a and the fixed contact 6a can be brought into contact with each other before the movable contact 10b and the fixed contact 7a come into contact with each other. The card member 11a is configured so that an even pressing force is applied to the movable contact 10a and the movable contact 10b in the contact direction Z1.

図６は、第３変形例に係る電磁継電器１００の内部を上方から見た模式図である。電磁継電器１００は、永久磁石２５ａ，２５ｂと、ヨーク２６とをさらに備えていてもよい。永久磁石２５ａ，２５ｂは、ケース２の周囲に配置され、ケース２内に磁界を発生させる。永久磁石２５ａ，２５ｂは、ケース２に支持されている。永久磁石２５ａと永久磁石２５ｂとは、前後方向に対向するように配置されている。 FIG. 6 is a schematic view of the inside of the electromagnetic relay 100 according to the third modification as viewed from above. The electromagnetic relay 100 may further include permanent magnets 25a and 25b and a yoke 26. The permanent magnets 25a and 25b are arranged around the case 2 to generate a magnetic field in the case 2. The permanent magnets 25a and 25b are supported by the case 2. The permanent magnets 25a and the permanent magnets 25b are arranged so as to face each other in the front-rear direction.

ヨーク２６は、略Ｕ字形状であり、永久磁石２５ａ，２５ｂを囲むようにして永久磁石２５ａ，２５ｂに接続されている。放熱部材２１は、ヨーク２６に接触して配置されている。ヨーク２６は、一部が外部に露出していてもよい。放熱部材２１は、ヨーク２６又はケース２に固定されている。その他の構成は、前記実施形態と同様である。この場合は、放熱部材２１を介して可動接触片１０の発熱をヨーク２６から放熱できる。 The yoke 26 has a substantially U-shape and is connected to the permanent magnets 25a and 25b so as to surround the permanent magnets 25a and 25b. The heat radiating member 21 is arranged in contact with the yoke 26. The yoke 26 may be partially exposed to the outside. The heat radiating member 21 is fixed to the yoke 26 or the case 2. Other configurations are the same as those in the above embodiment. In this case, the heat generated by the movable contact piece 10 can be dissipated from the yoke 26 via the heat radiating member 21.

図７は、第４変形例に係る電磁継電器１００の接点装置３を右方から見た模式図である。電磁継電器１００は、放熱部材２２をさらに備えてもよい。放熱部材２２は、放熱部材２１と同様の形状である。放熱部材２２は放熱部材２２と前後方向に間隔を隔てて配置されている。放熱部材２１は、可動接点１０ａよりも外側（前方）に配置されている。放熱部材２２は、可動接点１０ｂよりも外側（後方）に配置されている。放熱部材２１は、可動接触片１０が開離位置にあるときに可動接触片１０に接触せずに、可動接触片１０が接触位置にあるときに可動接触片１０に接触して１０可動接触片の発熱を放熱する。この場合は、複数の放熱部材２１，２２が設けられることになるので、可動接触片１０の放熱性の向上をさらに図ることができる。なお、放熱部材２１は、可動接点１０ａよりも内側に配置されてもよい。放熱部材２２は、可動接点１０ｂよりも内側に配置されていてもよい。 FIG. 7 is a schematic view of the contact device 3 of the electromagnetic relay 100 according to the fourth modification as viewed from the right. The electromagnetic relay 100 may further include a heat radiating member 22. The heat radiating member 22 has the same shape as the heat radiating member 21. The heat radiating member 22 is arranged at a distance from the heat radiating member 22 in the front-rear direction. The heat radiating member 21 is arranged outside (front) of the movable contact 10a. The heat radiating member 22 is arranged outside (rear) from the movable contact 10b. The heat radiating member 21 does not contact the movable contact piece 10 when the movable contact piece 10 is in the open position, but contacts the movable contact piece 10 when the movable contact piece 10 is in the contact position. Dissipate the heat generated by. In this case, since a plurality of heat radiating members 21 and 22 are provided, it is possible to further improve the heat radiating property of the movable contact piece 10. The heat radiating member 21 may be arranged inside the movable contact 10a. The heat radiating member 22 may be arranged inside the movable contact 10b.

電磁継電器１００が複数の放熱部材２１，２２を備える場合において、図８に示すように、例えば、放熱部材２１と放熱部材２２を千鳥配置にしてもよい。これにより、第２変形例と同様に一方の接点同士を他方の接点同士よりも先に接触又は開離させることができる。図８に示す例では、放熱部材２２は、放熱部材２１が可動接触片１０に接触する前に可動接触片１０に接触する。なお、図８では、図面を見易くするために放熱部材２１，２２を直線状に図示している。 When the electromagnetic relay 100 includes a plurality of heat radiating members 21 and 22, as shown in FIG. 8, for example, the heat radiating members 21 and the heat radiating members 22 may be arranged in a staggered manner. As a result, one contact can be brought into contact with or separated from the other contact before the other contact, as in the second modification. In the example shown in FIG. 8, the heat radiating member 22 comes into contact with the movable contact piece 10 before the heat radiating member 21 comes into contact with the movable contact piece 10. In FIG. 8, the heat radiating members 21 and 22 are shown in a straight line in order to make the drawings easier to see.

図９は、第５変形例に係る電磁継電器２００の接点装置１０３周辺の断面模式図である。図１０（Ａ）及び図１０（Ｂ）は、接点装置１０３を左方から見た模式図である。第５変形例は、本発明をプランジャ型の電磁継電器２００に適用した実施例である。その他の構成は、従来と同様の構成であるため簡略化して説明する。電磁継電器２００は、ケース１０２と、接点装置１０３と、図示しない駆動装置とを備えている。ケース１０２は、略四角形の箱型であり、樹脂などの絶縁性を有する材料で形成されている。接点装置１０３は、固定端子１０６，１０７と、可動接触片１１０と、放熱部材１２１とを含む。 FIG. 9 is a schematic cross-sectional view of the contact device 103 of the electromagnetic relay 200 according to the fifth modification. 10 (A) and 10 (B) are schematic views of the contact device 103 as viewed from the left. The fifth modification is an example in which the present invention is applied to a plunger type electromagnetic relay 200. Since the other configurations are the same as those of the conventional configuration, they will be briefly described. The electromagnetic relay 200 includes a case 102, a contact device 103, and a drive device (not shown). The case 102 has a substantially rectangular box shape, and is made of an insulating material such as resin. The contact device 103 includes fixed terminals 106 and 107, a movable contact piece 110, and a heat radiating member 121.

固定端子１０６は、固定接点１０６ａを含む。固定端子１０７は、固定接点１０７ａを含む。固定端子１０７は、固定端子１０６と左右方向に間隔を隔てて配置されている。可動接触片１１０は、左右方向に延びている。可動接触片１１０は、固定接点１０６ａに接触可能な可動接点１１０ａと、固定接点１０７ａに接触可能な可動接点１１０ｂとを含む。なお、固定端子１０６，１０７は、円柱形状であるが、固定端子１０６，１０７は、板状の端子であってもよい。 The fixed terminal 106 includes a fixed contact 106a. The fixed terminal 107 includes a fixed contact 107a. The fixed terminal 107 is arranged at a distance from the fixed terminal 106 in the left-right direction. The movable contact piece 110 extends in the left-right direction. The movable contact piece 110 includes a movable contact 110a that can contact the fixed contact 106a and a movable contact 110b that can contact the fixed contact 107a. The fixed terminals 106 and 107 have a cylindrical shape, but the fixed terminals 106 and 107 may be plate-shaped terminals.

可動機構１１１は、駆動軸１２０を含む。駆動軸１２０は、接触方向Ｚ１及び開離方向Ｚ２に沿って延びている。駆動軸１２０は、可動接触片１１０に連結されている。駆動装置は、電磁力によって駆動軸１２０を接触方向Ｚ１及び開離方向Ｚ２に移動させる。電磁継電器２００の動作については、従来と同様であるため説明を省略する。 The movable mechanism 111 includes a drive shaft 120. The drive shaft 120 extends along the contact direction Z1 and the separation direction Z2. The drive shaft 120 is connected to the movable contact piece 110. The drive device moves the drive shaft 120 in the contact direction Z1 and the opening direction Z2 by an electromagnetic force. Since the operation of the electromagnetic relay 200 is the same as the conventional one, the description thereof will be omitted.

放熱部材１２１は、ケース１０２に支持されている。放熱部材１２１は、上下方向において、駆動軸１２０と重ならない位置、且つ少なくとも一部が可動接触片１１０と重なる位置に配置されている。放熱部材１２１は、ケース２から外部に露出していてもよいし、図示しないヨークに接触していてもよい。 The heat radiating member 121 is supported by the case 102. The heat radiating member 121 is arranged in the vertical direction at a position where it does not overlap with the drive shaft 120 and at least a part thereof overlaps with the movable contact piece 110. The heat radiating member 121 may be exposed to the outside from the case 2 or may be in contact with a yoke (not shown).

放熱部材１２１は、図１０（Ａ）に示す開離位置に可動接触片１１０があるときに、可動接触片１１０に接触しない位置に配置されている。放熱部材１２１は、可動接触片１１０が開離位置のときに、可動接触片１１０から離れた位置に配置されている。放熱部材１２１は、図１０（Ｂ）に示す接触位置に可動接触片１１０があるときに、可動接触片１１０に接触して可動接触片１１０の発熱を放熱する。なお、図１１及び図１２に示すように、放熱部材１２１は、可動接点１１０ａ及び可動接点１１０ｂのいずれか一方に偏倚した位置に配置されてもよい。 The heat radiating member 121 is arranged at a position where it does not come into contact with the movable contact piece 110 when the movable contact piece 110 is at the opening position shown in FIG. 10 (A). The heat radiating member 121 is arranged at a position away from the movable contact piece 110 when the movable contact piece 110 is in the open position. When the movable contact piece 110 is located at the contact position shown in FIG. 10B, the heat radiating member 121 contacts the movable contact piece 110 and dissipates heat generated by the movable contact piece 110. As shown in FIGS. 11 and 12, the heat radiating member 121 may be arranged at a position deviated from either the movable contact 110a or the movable contact 110b.

図１３に示すように、電磁継電器２００は、放熱部材１２２をさらに備えてもよい。放熱部材１２１は、可動接点１１０ａ及び可動接点１１０ｂのいずれか一方に偏倚して配置され、放熱部材１２２は、可動接点１１０ａ及び可動接点１１０ｂのいずれか他方に偏倚して配置されている。この場合においても、図１４に示すように、放熱部材１２１と放熱部材１２２を千鳥配置にしてもよい。例えば、図１４に示す例では、放熱部材１２２は、放熱部材１２１が可動接触片１１０に接触する前に可動接触片１１０に接触する。 As shown in FIG. 13, the electromagnetic relay 200 may further include a heat radiating member 122. The heat radiating member 121 is arranged unevenly on either one of the movable contact 110a and the movable contact 110b, and the heat radiating member 122 is arranged biased on either one of the movable contact 110a and the movable contact 110b. Also in this case, as shown in FIG. 14, the heat radiating member 121 and the heat radiating member 122 may be arranged in a staggered manner. For example, in the example shown in FIG. 14, the heat radiating member 122 comes into contact with the movable contact piece 110 before the heat radiating member 121 comes into contact with the movable contact piece 110.

図１５に示すように、電磁継電器１００は、放熱部材２１の周囲に設けられる絶縁壁２８をさらに備えてもよい。絶縁壁２８は、固定接点６ａ，７ａと可動接点１０ａ，１０ｂの間で生じたアークから放熱部材２１を保護する。絶縁壁２８は、例えばケース２と一体的に形成されている。絶縁壁２８の形状は、永久磁石２５ａ，２５ｂの配置などによって適宜変更してもよい。なお、上述した放熱部材２２，１２１，１２２の周囲においても、絶縁壁２８が設けられてもよい。 As shown in FIG. 15, the electromagnetic relay 100 may further include an insulating wall 28 provided around the heat radiating member 21. The insulating wall 28 protects the heat radiating member 21 from the arc generated between the fixed contacts 6a and 7a and the movable contacts 10a and 10b. The insulating wall 28 is integrally formed with, for example, the case 2. The shape of the insulating wall 28 may be appropriately changed depending on the arrangement of the permanent magnets 25a and 25b and the like. The insulating wall 28 may also be provided around the heat radiating members 22, 121, 122 described above.

放熱部材２１は、導電性であってもよく、例えば、図１６に示すように、可動接触片１０と複数箇所で接触してもよい。詳細には、放熱部材２１は、第１接触部２１ａと第２接触部２１ｂとを含んでもよい。第１接触部２１ａ及び第２接触部２１ｂは、可動接触片１０が接触位置にあるときに可動接触片１０に接触する。第２接触部２１ｂは、第１接触部２１ａから離れた位置に配置されている。第１接触部２１ａ及び第２接触部２１ｂは、可動接点１０ａと可動接点１０ｂとの間に配置されている。この場合は、放熱部材２１が電路としても機能するので、電路が増加するとともに、可動接触片１０の発熱をさらに抑制することができる。 The heat radiating member 21 may be conductive, and may come into contact with the movable contact piece 10 at a plurality of locations, for example, as shown in FIG. Specifically, the heat radiating member 21 may include a first contact portion 21a and a second contact portion 21b. The first contact portion 21a and the second contact portion 21b come into contact with the movable contact piece 10 when the movable contact piece 10 is in the contact position. The second contact portion 21b is arranged at a position away from the first contact portion 21a. The first contact portion 21a and the second contact portion 21b are arranged between the movable contact 10a and the movable contact 10b. In this case, since the heat radiating member 21 also functions as an electric path, the number of electric paths can be increased and the heat generation of the movable contact piece 10 can be further suppressed.

図１７に示すように、放熱部材２１は、本体部２１ｃと、接点部２１ｄとを含んでもよい。接点部２１ｄは、本体部２１ｃから可動接触片１０に向かって突出する。接点部２１ｄは、本体部２１ｃと一体であってもよいし、別体であってもよい。この場合は、可動接触片１０と放熱部材２１との接触が安定する。 As shown in FIG. 17, the heat radiating member 21 may include a main body portion 21c and a contact portion 21d. The contact portion 21d projects from the main body portion 21c toward the movable contact piece 10. The contact portion 21d may be integrated with the main body portion 21c or may be a separate body. In this case, the contact between the movable contact piece 10 and the heat radiating member 21 is stable.

本発明によれば、電磁継電器において、可動接触片の重量の増加を抑えつつ、可動接触片の放熱性の向上を図ることができる。 According to the present invention, in an electromagnetic relay, it is possible to improve the heat dissipation of the movable contact piece while suppressing an increase in the weight of the movable contact piece.

２ ケース
４ 駆動装置
６ 固定端子（第１固定端子の一例）
６ａ 固定接点（第１固定接点の一例）
７ 固定端子（第２固定端子の一例）
７ａ 固定接点（第２固定接点の一例）
１０ 可動接触片
１０ａ 可動接点（第１可動接点の一例）
１０ｂ 可動接点（第２可動接点の一例）
１１ 可動機構
２１ 放熱部材（第１放熱部材の一例）
２２ 放熱部材（第２放熱部材の一例）
２５ａ，２５ｂ 永久磁石
２６ ヨーク
１００ 電磁継電器 2 Case 4 Drive device 6 Fixed terminal (Example of first fixed terminal)
6a Fixed contact (an example of the first fixed contact)
7 Fixed terminal (an example of the second fixed terminal)
7a Fixed contact (an example of the second fixed contact)
10 Movable contact piece 10a Movable contact (an example of the first movable contact)
10b movable contact (an example of the second movable contact)
11 Movable mechanism 21 Heat dissipation member (an example of the first heat dissipation member)
22 Heat dissipation member (an example of the second heat dissipation member)
25a, 25b Permanent magnet 26 York 100 Electromagnetic relay

Claims (11)

第１固定接点を含む第１固定端子と、
前記第１固定接点に接触可能な第１可動接点を含む可動接触片と、
前記第１可動接点が前記第１固定接点に接触する接触位置と前記第１可動接点が前記第１固定接点から開離する開離位置とに前記可動接触片を移動させる可動機構と、
電磁力によって前記可動機構を作動させる駆動装置と、
前記可動接触片が前記開離位置にあるときに前記可動接触片に接触せずに、前記可動接触片が前記接触位置にあるときに前記可動接触片に接触して前記可動接触片の発熱を放熱する第１放熱部材と、
を備える、電磁継電器。 The first fixed terminal including the first fixed contact and
A movable contact piece including a first movable contact that can contact the first fixed contact,
A movable mechanism that moves the movable contact piece to a contact position where the first movable contact contacts the first fixed contact and an opening position where the first movable contact separates from the first fixed contact.
A drive device that operates the movable mechanism by electromagnetic force,
When the movable contact piece is in the open position, it does not contact the movable contact piece, but when the movable contact piece is in the contact position, it contacts the movable contact piece and generates heat of the movable contact piece. The first heat dissipation member that dissipates heat,
Equipped with an electromagnetic relay. 前記第１放熱部材は、前記第１可動接点が前記第１固定接点に接触する前に前記可動接触片に接触する、
請求項１に記載の電磁継電器。 The first heat radiating member contacts the movable contact piece before the first movable contact contacts the first fixed contact.
The electromagnetic relay according to claim 1. 前記第１放熱部材は、前記第１可動接点が前記第１固定接点に接触する方向に撓む、
請求項１又は２に記載の電磁継電器。 The first heat radiating member bends in the direction in which the first movable contact contacts the first fixed contact.
The electromagnetic relay according to claim 1 or 2. 前記第１固定接点及び前記第１可動接点を収容するケースをさらに備え、
前記第１放熱部材は、前記ケースから外部に露出する、
請求項１から３のいずれか１項に記載の電磁継電器。 Further provided with a case for accommodating the first fixed contact and the first movable contact.
The first heat radiating member is exposed to the outside from the case.
The electromagnetic relay according to any one of claims 1 to 3. 前記第１固定接点及び前記第１可動接点を収容するケースと、
前記ケース内に磁界を発生させる永久磁石と、
前記永久磁石に接続されるヨークと、
をさらに備え、
前記第１放熱部材は、前記ヨークに接触して配置される、
請求項１から３のいずれか１項に記載の電磁継電器。 A case accommodating the first fixed contact and the first movable contact,
A permanent magnet that generates a magnetic field inside the case,
The yoke connected to the permanent magnet and
With more
The first heat radiating member is arranged in contact with the yoke.
The electromagnetic relay according to any one of claims 1 to 3. 前記第１放熱部材は、前記可動接触片と同じ材料又は前記可動接触片よりも熱伝導率の高い材料からなる、
請求項１から５のいずれか１項に記載の電磁継電器。 The first heat radiating member is made of the same material as the movable contact piece or a material having a higher thermal conductivity than the movable contact piece.
The electromagnetic relay according to any one of claims 1 to 5. 前記第１放熱部材は、本体部と、前記本体部から前記可動接触片に向かって突出する接点部とを含み、
前記接点部は、前記可動接触片が前記接触位置にあるときに前記可動接触片に接触する、
請求項１から６のいずれか１項に記載の電磁継電器。 The first heat radiating member includes a main body portion and a contact portion protruding from the main body portion toward the movable contact piece.
The contact portion contacts the movable contact piece when the movable contact piece is in the contact position.
The electromagnetic relay according to any one of claims 1 to 6. 前記第１放熱部材の周囲に設けられ、前記第１固定接点と前記第１可動接点との間で生じたアークから前記第１放熱部材を保護する絶縁壁をさらに備える、
請求項１から７のいずれか１項に記載の電磁継電器。 An insulating wall provided around the first heat radiating member and protecting the first heat radiating member from an arc generated between the first fixed contact and the first movable contact is further provided.
The electromagnetic relay according to any one of claims 1 to 7. 第２固定接点を含み、前記第１固定端子と間隔を隔てて配置される第２固定端子をさらに備え、
前記可動接触片は、前記第２固定接点に接触可能な第２可動接点を含み、
前記第２可動接点は、前記可動接触片が前記接触位置にあるときに前記第２固定接点に接触し、前記可動接触片が前記開離位置にあるときに前記第２固定接点から開離し、
前記第１放熱部材は、導電性であり、前記可動接触片が前記接触位置にあるときに前記可動接触片に接触する第１接触部と、前記第１接触部から離れた位置に配置され前記可動接触片が前記接触位置にあるときに前記可動接触片に接触する第２接触部とを含み、
前記第１接触部及び前記第２接触部は、前記第１可動接点と前記第２可動接点との間に配置されている、
請求項１から８のいずれか１項に記載の電磁継電器。 A second fixed terminal including a second fixed contact and further provided with a second fixed terminal arranged at a distance from the first fixed terminal.
The movable contact piece includes a second movable contact that can contact the second fixed contact.
The second movable contact contacts the second fixed contact when the movable contact piece is in the contact position, and is separated from the second fixed contact when the movable contact piece is in the open position.
The first heat radiating member is conductive, and is arranged at a position away from the first contact portion that comes into contact with the movable contact piece when the movable contact piece is in the contact position and the first contact portion. Including a second contact portion that comes into contact with the movable contact piece when the movable contact piece is in the contact position.
The first contact portion and the second contact portion are arranged between the first movable contact and the second movable contact.
The electromagnetic relay according to any one of claims 1 to 8. 第２固定接点を含み、前記第１固定端子と間隔を隔てて配置される第２固定端子をさらに備え、
前記可動接触片は、前記第２固定接点に接触可能な第２可動接点を含み、
前記第２可動接点は、前記可動接触片が前記接触位置にあるときに前記第２固定接点に接触し、前記可動接触片が前記開離位置にあるときに前記第２固定接点から開離し、
前記第１放熱部材は、前記第１可動接点及び前記第２可動接点のいずれか一方に偏倚した位置に配置されている、
請求項２に記載の電磁継電器。 A second fixed terminal including a second fixed contact and further provided with a second fixed terminal arranged at a distance from the first fixed terminal.
The movable contact piece includes a second movable contact that can contact the second fixed contact.
The second movable contact contacts the second fixed contact when the movable contact piece is in the contact position, and is separated from the second fixed contact when the movable contact piece is in the open position.
The first heat radiating member is arranged at a position deviated from either the first movable contact or the second movable contact.
The electromagnetic relay according to claim 2. 前記第１放熱部材と間隔を隔てて配置され、前記可動接触片が前記開離位置にあるときに前記可動接触片に接触せずに、前記可動接触片が前記接触位置にあるときに前記可動接触片に接触して前記可動接触片の発熱を放熱する第２放熱部材をさらに備え、
前記第２放熱部材は、前記第１放熱部材が前記可動接触片に接触する前に前記可動接触片に接触する
請求項７に記載の電磁継電器。 The movable contact piece is arranged at a distance from the first heat radiating member, and does not come into contact with the movable contact piece when the movable contact piece is in the open position, and is movable when the movable contact piece is in the contact position. A second heat radiating member that contacts the contact piece and dissipates heat generated by the movable contact piece is further provided.
The electromagnetic relay according to claim 7, wherein the second heat radiating member comes into contact with the movable contact piece before the first heat radiating member comes into contact with the movable contact piece.

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