WO2022091574A1 - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

Info

Publication number
WO2022091574A1
WO2022091574A1 PCT/JP2021/032332 JP2021032332W WO2022091574A1 WO 2022091574 A1 WO2022091574 A1 WO 2022091574A1 JP 2021032332 W JP2021032332 W JP 2021032332W WO 2022091574 A1 WO2022091574 A1 WO 2022091574A1
Authority
WO
WIPO (PCT)
Prior art keywords
movable contact
fixed
arc guide
contact piece
arc
Prior art date
Application number
PCT/JP2021/032332
Other languages
French (fr)
Japanese (ja)
Inventor
航平 大塚
亮太 箕輪
直樹 川口
Original Assignee
オムロン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オムロン株式会社 filed Critical オムロン株式会社
Publication of WO2022091574A1 publication Critical patent/WO2022091574A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H50/38—Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/46—Means for extinguishing or preventing arc between current-carrying parts using arcing horns

Definitions

  • the present invention relates to an electromagnetic relay.
  • the electromagnetic relay disclosed in Patent Document 1 includes an arc guide (arc horn).
  • the arc guide is connected to a movable contact piece and extends away from the fixed terminal. The arc generated between the contacts is quickly extinguished by extending along the arc guide.
  • An object of the present disclosure is to reduce the arc length required to extinguish an arc in an electromagnetic relay.
  • the electromagnetic relay includes a fixed terminal, a fixed contact, a movable contact piece, a movable contact, a drive device, and a first arc guide.
  • the fixed contacts are connected to the fixed terminals.
  • the movable contact faces the fixed contact and is connected to the movable contact piece.
  • the drive device moves the movable contact piece between the closed position and the open position.
  • the movable contact piece is in the closed position and the movable contact contacts the fixed contact.
  • the movable contact piece is in the open position, and the movable contact is separated from the fixed contact.
  • the first arc guide is connected to a fixed terminal or a movable contact piece.
  • the first arc guide is made of the first material.
  • the first material has a higher electrical resistance than the fixed terminal to which the first arc guide is connected or the movable contact piece.
  • the first arc guide is formed of a fixed terminal to which the first arc guide is connected or a first material having a higher electric resistance than a movable contact piece. Therefore, when the starting point of the arc moves to the arc guide, the arc current drops. As a result, the arc length required for arc extinguishing is shortened.
  • the first arc guide may extend in the first direction.
  • the first direction may be the direction in which the Lorentz force acts on the arc due to the current flowing between the movable contact and the fixed contact. In this case, the Lorentz force moves the starting point of the arc to the first arc guide.
  • the first arc guide may be connected to a fixed terminal.
  • the first arc guide may include a first portion and a second portion.
  • the first portion may extend from the fixed terminal in the first direction.
  • the second portion may extend from the first portion in the second direction.
  • the second direction may be the direction from the movable contact to the fixed contact. In this case, the starting point of the arc passes through the first portion and moves to the second portion. Then, the arc is extended in the second part. As a result, the arc is quickly extinguished.
  • the second portion may be inclined with respect to the second direction so as to be away from the fixed contact toward the second direction. In this case, the arc is extended in the second part. As a result, the arc is quickly extinguished.
  • the first arc guide may be connected to a movable contact piece.
  • the first arc guide may include a third portion and a fourth portion.
  • the third portion may extend in the first direction from the movable contact piece.
  • the fourth portion may extend from the third portion in the third direction.
  • the third direction may be the direction from the fixed contact to the movable contact. In this case, the starting point of the arc passes through the third part and moves to the fourth part. Then, the arc is extended in the fourth part. As a result, the arc is quickly extinguished.
  • the fourth part may be inclined with respect to the third direction so as to be away from the movable contact toward the third direction. In this case, the arc is extended in the fourth part. As a result, the arc is quickly extinguished.
  • the movable contact piece may include a first surface and a second surface.
  • the first surface may face the fixed contact.
  • the second surface may be located on the opposite side of the first surface.
  • the first arc guide may be connected to the second surface. In this case, the starting point of the arc moves toward the second surface to reach the first arc guide. As a result, the arc current is reduced and the arc length required for extinguishing the arc is shortened.
  • the first arc guide may be arranged at a position different from the energization path.
  • the energization path may pass through a fixed terminal, a fixed contact, a movable contact, and a movable contact piece. In this case, the influence of the first arc guide on the electrical resistance of the energization path is suppressed. As a result, a decrease in the energization capacity of the electromagnetic relay can be suppressed.
  • the first arc guide may be connected to a fixed terminal.
  • the first material may have a higher electrical resistance than the fixed terminal.
  • the electromagnetic relay may further include a second arc guide.
  • the second arc guide may be connected to the movable contact piece.
  • the second arc guide may be made of a second material having a higher electrical resistance than the movable contact piece. In this case, the arc current is further reduced by the first arc guide and the second arc guide. As a result, the arc length required for arc extinguishing is further shortened.
  • the arc length required to extinguish an arc can be shortened.
  • FIG. 3 is a sectional view taken along line III-III in FIG. It is an enlarged view of a fixed terminal and a movable contact piece. It is an enlarged view of the fixed terminal and the movable contact piece which concerns on 1st modification. It is an enlarged view of the fixed terminal and the movable contact piece which concerns on the 2nd modification. It is an enlarged view of the fixed terminal and the movable contact piece which concerns on 3rd modification. It is an enlarged view of the fixed terminal and the movable contact piece which concerns on 4th modification. It is an enlarged view of the fixed terminal and the movable contact piece which concerns on 5th modification. It is a figure which shows the electromagnetic relay which concerns on other embodiment.
  • FIG. 1 is a front sectional view of the electromagnetic relay 1.
  • the electromagnetic relay 1 includes a housing 2, a contact device 3, and a drive device 4.
  • the housing 2 is made of an insulating material such as resin. However, the housing 2 may be made of another material such as ceramic.
  • the contact device 3 is housed in the housing 2.
  • the contact device 3 includes a first fixed terminal 6, a second fixed terminal 7, a movable contact piece 8, a movable mechanism 9, a first fixed contact 10, a second fixed contact 11, and a first movable contact 12. , The second movable contact 13 and the like.
  • the direction from the first movable contact 12 to the first fixed contact 10 is defined as "downward” in the following description. "Down” is an example of the second direction.
  • the third direction from the first fixed contact 10 to the first movable contact 12 is defined as "upward”. "Upper” is an example of the third direction.
  • the direction in which the movable contact piece 8 extends is defined as the left-right direction.
  • the direction from the second fixed contact 11 to the first fixed contact 10 is defined as the left side.
  • the direction from the first fixed contact 10 to the second fixed contact 11 is defined as the right side.
  • the first fixed terminal 6, the second fixed terminal 7, the movable contact piece 8, the first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are conductive. It is made of a material having sex.
  • the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 are made of a metal material known as a terminal material such as phosphor bronze, beryllium copper, brass, or tough pitch copper.
  • the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 may be made of different materials.
  • the first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are made of a metal material known as a contact material such as a copper-based metal or a silver-based metal.
  • the first fixed terminal 6 and the second fixed terminal 7 extend in the vertical direction.
  • the first fixed terminal 6 and the second fixed terminal 7 are arranged so as to be spaced apart from each other in the left-right direction.
  • the first fixed contact 10 is connected to the first fixed terminal 6.
  • a second fixed contact 11 is connected to the second fixed terminal 7.
  • the first fixed contact 10 and the second fixed contact 11 are arranged in the housing 2.
  • the movable contact piece 8 is arranged in the housing 2.
  • the first movable contact 12 and the second movable contact 13 are connected to the movable contact piece 8.
  • the first movable contact 12 faces the first fixed contact 10.
  • the second movable contact 13 faces the second fixed contact 11.
  • the first movable contact 12 is arranged at a distance from the second movable contact 13 in the left-right direction.
  • the movable contact piece 8 can move up and down.
  • the movable contact piece 8 can move between the closed position and the open position.
  • the movable contact piece 8 is in the open position, and the movable contacts 12 and 13 are separated from the fixed contacts 10 and 11.
  • the movable contact piece 8 is in the closed position, and the movable contacts 12 and 13 are in contact with the fixed contacts 10 and 11.
  • the direction in which the movable contacts 12 and 13 approach the fixed contacts 10 and 11 is defined as the contact direction.
  • the direction in which the movable contacts 12 and 13 are separated from the fixed contacts 10 and 11 is defined as the opening direction.
  • the movable mechanism 9 supports the movable contact piece 8.
  • the movable mechanism 9 includes a drive shaft 15 and a contact spring 16.
  • the drive shaft 15 is connected to the movable contact piece 8.
  • the drive shaft 15 extends in the vertical direction and penetrates the movable contact piece 8 in the vertical direction.
  • the drive shaft 15 is provided so as to be movable in the vertical direction.
  • the contact spring 16 urges the movable contact piece 8 toward the contact direction.
  • the drive device 4 includes a coil 21, a spool 22, a movable iron core 23, a fixed iron core 24, a yoke 25, and a return spring 26.
  • the drive device 4 moves the movable contact piece 8 between the open position and the closed position via the movable mechanism 9 by an electromagnetic force.
  • the coil 21 is wound around the spool 22.
  • the movable core 23 and the fixed core 24 are arranged in the spool 22.
  • the movable iron core 23 is connected to the drive shaft 15.
  • the movable iron core 23 is movable in the vertical direction.
  • the fixed iron core 24 is arranged so as to face the movable iron core 23.
  • the return spring 26 urges the movable iron core 23 in the opening direction.
  • the movable iron core 23 is attracted to the fixed core 24 by the magnetic force generated by the magnetic field generated from the coil 21.
  • the movable iron core 23 and the drive shaft 15 move in the contact direction against the urging force of the return spring 26.
  • the movable contact piece 8 moves to the closed position shown in FIG. 2, and the movable contacts 12 and 13 come into contact with the fixed contacts 10 and 11.
  • the drive shaft 15 further moves in the contact direction, so that the contact spring 16 is compressed.
  • FIG. 3 is a sectional view taken along line III-III in FIG.
  • the electromagnetic relay 1 includes magnets 27 and 28.
  • the magnets 27 and 28 are permanent magnets. However, one of the magnets 27 and 28 may be a yoke.
  • the magnets 27 and 28 are arranged around the housing 2. The magnets 27 and 28 are arranged so that the starting point of the arc generated at the contacts 10-13 is moved in a predetermined direction by a magnetic force.
  • the magnets 27 and 28 generate a magnetic field in the housing 2.
  • the dashed arrow indicates the direction of the magnetic field. Due to this magnetic field, the first Lorentz force F1 acts on the arc generated in the first fixed contact 10 and the first movable contact 12. As a result, the starting point of the arc moves in the direction of the first Lorentz force F1. Further, the arc is extended in the direction of the first Lorentz force F1. Similarly, the Lorentz force F2 acts on the arc generated in the second fixed contact 11 and the second movable contact 13. As a result, the starting point of the arc moves in the direction of the Lorentz force F2. Further, the arc is extended in the direction of the Lorentz force F2. In FIG.
  • arrows F1 and F2 indicate the Lorentz force when a current flows from the first fixed terminal 6 to the second fixed terminal 7 via the movable contact piece 8.
  • the first Lorentz force F1 faces to the left.
  • the direction of the first Lorentz force F1, that is, "left” is an example of the first direction.
  • the Lorentz force F2 is facing to the right.
  • FIG. 4 is an enlarged view of the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8.
  • the electromagnetic relay 1 includes a first arc guide 31, a second arc guide 32, a third arc guide 33, and a fourth arc guide 34.
  • the broken line indicates an arc.
  • the first to fourth arc guides 31-34 are made of different materials from the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8.
  • the first to fourth arc guides 31-34 are formed of a first material having a higher electrical resistance than the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8.
  • the first material is either a copper nickel alloy, a copper manganese alloy, nickel chromium, iron chromium, or sus304. These materials have higher volume and lower efficiency than the terminal materials described above.
  • the 1st to 4th arc guides 31-34 are arranged at positions different from the energization path R1.
  • the energization path R1 is a path of electric current passing through the fixed terminals 6 and 7, the fixed contacts 10 and 11, the movable contacts 12 and 13, and the movable contact piece 8.
  • the first to fourth arc guides 31-34 are arranged outside the energization path R1 in the left-right direction.
  • the first arc guide 31 is connected to the first fixed terminal 6.
  • the first arc guide 31 has a bent shape.
  • the first arc guide 31 includes a first portion 35 and a second portion 36.
  • the first portion 35 extends from the first fixed terminal 6 to the left, that is, in the direction of the first Lorentz force F1.
  • the second portion 36 extends upward from the first portion 35.
  • the second arc guide 32 is connected to the movable contact piece 8.
  • the second arc guide 32 has a bent shape.
  • the second arc guide 32 includes a third portion 37 and a fourth portion 38.
  • the third portion 37 extends from the movable contact piece 8 to the left, that is, in the direction of the first Lorentz force F1.
  • the fourth portion 38 extends downward from the third portion 37.
  • the fourth portion 38 is inclined downward with respect to the vertical direction so as to be separated from the first movable contact 12.
  • the third arc guide 33 is connected to the second fixed terminal 7.
  • the third arc guide 33 has a shape symmetrical to that of the first arc guide 31.
  • the third arc guide 33 includes a fifth portion 39 and a sixth portion 40.
  • the fifth portion 39 and the sixth portion 40 have symmetrical shapes with the first portion 35 and the second portion 36, respectively.
  • the fourth arc guide 34 is connected to the movable contact piece 8.
  • the fourth arc guide 34 has a shape symmetrical to that of the second arc guide 32.
  • the fourth arc guide 34 includes a seventh portion 41 and an eighth portion 42.
  • the seventh portion 41 and the eighth portion 42 have symmetrical shapes with the third portion 37 and the fourth portion 38, respectively.
  • the first to fourth arc guides 31-34 have higher electrical resistance than the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8. It is made of one material. Therefore, when the starting point of the arc moves to the first to fourth arc guides 31-34, the arc current decreases. As a result, the arc length required for arc extinguishing is shortened. Further, the damage to the contact device 3 is reduced by reducing the arc energy.
  • the 1st to 4th arc guides 31-34 are arranged at positions deviating from the energization path R1. Therefore, the influence on the electric resistance in the energization path R1 is suppressed. As a result, a decrease in the energization capacity of the electromagnetic relay 1 can be suppressed.
  • the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the invention.
  • the configuration of the contact device is not limited to that of the above embodiment, and may be changed.
  • the shape of the movable contact piece 8 may be changed.
  • the first movable contact 12 and the second movable contact 13 may be integrated with the movable contact piece 8.
  • the shapes of the fixed terminals 6 and 7 may be changed.
  • the first fixed contact 10 may be integrated with the first fixed terminal 6.
  • the second fixed contact 11 may be integrated with the second fixed terminal 7.
  • the number of movable contacts is not limited to two, and may be more than two.
  • the number of fixed contacts is not limited to two, and may be more than two.
  • the configuration of the movable mechanism 9 is not limited to that of the above embodiment, and may be changed.
  • the configuration of the drive device 4 is not limited to that of the above embodiment, and may be changed.
  • the arrangement of the magnets 27 and 28 or the arrangement of the magnetic field by the magnets 27 and 28 is not limited to that of the above embodiment, and may be changed.
  • the magnets 27 and 28 may be omitted.
  • the Lorentz force may be generated by the magnetic field generated by the current flowing through the energization path R1 or by the magnetic field generated in the arc.
  • the materials of the 1st to 4th arc guides 31-34 may be different from each other.
  • the second arc guide 32 may be made of a second material.
  • the second material like the first material, has higher electrical resistance than the fixed terminals 6 and 7 and the movable contact piece 8.
  • the second material may be different from the first material.
  • FIG. 5 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the first modification.
  • the second arc guide 32 and the fourth arc guide 34 may be omitted. That is, the arc guide may be provided only on the fixed terminals 6 and 7, and the arc guide may not be provided on the movable contact piece 8.
  • FIG. 6 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the second modification.
  • the first arc guide 31 and the third arc guide 33 may be omitted. That is, the arc guide may be provided only on the movable contact piece 8, and the arc guide may not be provided on the fixed terminals 6 and 7.
  • the arc guide is not limited to a bent shape, but may have another shape.
  • FIG. 7 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the third modification.
  • the first arc guide 31 and the third arc guide 33 may have a prismatic shape.
  • the second arc guide 32 and the fourth arc guide 34 may have a prismatic shape.
  • FIG. 8 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the fourth modification.
  • the second arc guide 32 and the fourth arc guide 34 may have a plate-like shape.
  • the movable contact piece 8 includes a first surface 81 and a second surface 82.
  • the first surface 81 faces the first fixed contact 10 and the second fixed contact 11.
  • the first movable contact 12 and the second movable contact 13 are connected to the first surface 81.
  • the second surface 82 is located on the opposite side of the first surface 81.
  • the second arc guide 32 and the fourth arc guide 34 may be connected to the second surface 82.
  • FIG. 9 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the fifth modification.
  • the second portion 36 of the first arc guide 31 may be inclined in the vertical direction so as to move upward and away from the first fixed contact 10.
  • the sixth portion 40 of the third arc guide 33 may be inclined in the vertical direction so as to move upward and away from the second fixed contact 11.
  • the electromagnetic relay 1 according to the above embodiment is a so-called plunger type electromagnetic relay.
  • the electromagnetic relay may be of another type.
  • FIG. 10 is a diagram showing an electromagnetic relay 100 according to a modified example.
  • the electromagnetic relay 100 according to the modified example is a so-called hinge type electromagnetic relay.
  • the electromagnetic relay 100 according to the modified example includes a fixed terminal 101, a movable contact piece 102, a fixed contact 103, a movable contact 104, a drive device 105, and a base 106.
  • the fixed terminal 101, the movable contact piece 102, and the drive device 105 are supported by the base 106.
  • the fixed contact 103 is connected to the fixed terminal 101.
  • the movable contact 104 is connected to the movable contact piece 102.
  • the fixed terminal 101 and the movable contact piece 102 are made of the terminal material described above.
  • the drive device 105 includes a coil 107, a bobbin 108, an iron core 109, a movable piece 110, a card 111, and a yoke 112.
  • the coil 107 is wound around the bobbin 108.
  • the iron core 109 is arranged in the bobbin 108.
  • the yoke 112 is connected to the iron core 109.
  • the movable piece 110 is attracted to the iron core 109 by the magnetic force.
  • the card 111 presses the movable contact piece 102 by being pressed by the movable piece 110.
  • the movable contact piece 102 moves in the contact direction when pressed by the card 111.
  • the movable contact 104 comes into contact with the fixed contact 103.
  • the movable contact piece 102 moves in the opening direction due to the elastic force of the movable contact piece 102 or the urging force of the return spring (not shown). As a result, the movable contact 104 is separated from the fixed contact 103.
  • the electromagnetic relay 100 includes an arc guide 113.
  • the arc guide 113 is made of a material having a higher electric resistance than the fixed terminal 101 and the movable contact piece 102, similarly to the first to fourth arc guides 31-34 of the above-described embodiment.
  • the arc guide 113 includes a first portion 114 and a second portion 115.
  • the first portion 114 extends upward from the movable contact piece 102.
  • the second portion 115 extends from the first portion 114 toward the drive device 105.
  • the second portion 115 extends from the fixed contact 103 toward the movable contact 104.
  • the arc current decreases when the starting point of the arc moves to the arc guide 113, as in the electromagnetic relay 1 according to the above-described embodiment. As a result, the arc length required for arc extinguishing is shortened.
  • the arc length required to extinguish an arc can be shortened.

Abstract

This electromagnetic relay comprises a fixed terminal, a fixed contact, a movable contact piece, a movable contact, a drive device, and a first arc guide. The fixed contact is connected to the fixed terminal. The movable contact faces the fixed contact and is connected to the movable contact piece. The drive device causes the movable contact piece to move to a closed position and to an open position. When the movable contact piece is in the closed position, the movable contact is in contact with the fixed contact. When the movable contact piece is in the open position, the movable contact separates from the fixed contact. The first arc guide is connected either to the fixed terminal or to the movable contact piece. The first arc guide is formed of a first material. The first material has a higher electrical resistance than the fixed terminal/movable contact piece to which the first arc guide is connected.

Description

電磁継電器Electromagnetic relay
　本発明は、電磁継電器に関する。 The present invention relates to an electromagnetic relay.
　電磁継電器では、接点間にアークが発生することがある。その場合、アークにより電磁継電器の機械寿命が低下してしまう。そのため、例えば特許文献１に開示されている電磁継電器は、アークガイド（アークホーン）を備えている。アークガイドは、可動接触片に接続されており、固定端子から離れる方向に延びている。接点間で発生したアークは、アークガイドに沿って伸長されることで、迅速に消弧される。 In electromagnetic relays, arcs may occur between contacts. In that case, the arc shortens the mechanical life of the electromagnetic relay. Therefore, for example, the electromagnetic relay disclosed in Patent Document 1 includes an arc guide (arc horn). The arc guide is connected to a movable contact piece and extends away from the fixed terminal. The arc generated between the contacts is quickly extinguished by extending along the arc guide.
特開平６－２１５６７０号公報Japanese Unexamined Patent Publication No. 6-215670
　上記の電磁継電器では、アークホーンによりアークの起点を移動させることができる。しかし、アークを消弧するために必要なアーク長を短縮することはできない。本開示の目的は、電磁継電器において、アークを消弧するために必要なアーク長を短縮することにある。 In the above electromagnetic relay, the starting point of the arc can be moved by the arc horn. However, the arc length required to extinguish the arc cannot be shortened. An object of the present disclosure is to reduce the arc length required to extinguish an arc in an electromagnetic relay.
　本開示の一態様に係る電磁継電器は、固定端子と、固定接点と、可動接触片と、可動接点と、駆動装置と、第１アークガイドとを備える。固定接点は、固定端子に接続される。可動接点は、固定接点と向かい合い、可動接触片に接続される。駆動装置は、閉位置と開位置とに可動接触片を移動させる。可動接触片が閉位置で、可動接点が固定接点に接触する。可動接触片が開位置で、可動接点が固定接点から離れる。第１アークガイドは、固定端子、又は、可動接触片に接続される。第１アークガイドは、第１材料で形成される。第１材料は、第１アークガイドが接続された固定端子、又は、可動接触片よりも高い電気抵抗を有する。 The electromagnetic relay according to one aspect of the present disclosure includes a fixed terminal, a fixed contact, a movable contact piece, a movable contact, a drive device, and a first arc guide. The fixed contacts are connected to the fixed terminals. The movable contact faces the fixed contact and is connected to the movable contact piece. The drive device moves the movable contact piece between the closed position and the open position. The movable contact piece is in the closed position and the movable contact contacts the fixed contact. The movable contact piece is in the open position, and the movable contact is separated from the fixed contact. The first arc guide is connected to a fixed terminal or a movable contact piece. The first arc guide is made of the first material. The first material has a higher electrical resistance than the fixed terminal to which the first arc guide is connected or the movable contact piece.
　本態様に係る電磁継電器では、第１アークガイドは、第１アークガイドが接続された固定端子、又は、可動接触片よりも高い電気抵抗を有する第１材料で形成される。そのため、アークの起点がアークガイドへ移動したときに、アーク電流が低下する。それにより、消弧のために必要なアーク長が短縮される。 In the electromagnetic relay according to this aspect, the first arc guide is formed of a fixed terminal to which the first arc guide is connected or a first material having a higher electric resistance than a movable contact piece. Therefore, when the starting point of the arc moves to the arc guide, the arc current drops. As a result, the arc length required for arc extinguishing is shortened.
　第１アークガイドは、第１方向へ延びていてもよい。第１方向は、可動接点と固定接点とを流れる電流によりアークにローレンツ力が作用する方向であってもよい。この場合、ローレンツ力により、アークの起点が第１アークガイドへ移動する。 The first arc guide may extend in the first direction. The first direction may be the direction in which the Lorentz force acts on the arc due to the current flowing between the movable contact and the fixed contact. In this case, the Lorentz force moves the starting point of the arc to the first arc guide.
　第１アークガイドは、固定端子に接続されていてもよい。第１アークガイドは、第１部分と第２部分とを含んでもよい。第１部分は、固定端子から第１方向へ延びていてもよい。第２部分は、第１部分から第２方向へ延びていてもよい。第２方向は、可動接点から固定接点へ向かう方向であってもよい。この場合、アークの起点は、第１部分を通り、第２部分へ移動する。そして、アークが第２部分において伸長される。それにより、アークが迅速に消弧される。 The first arc guide may be connected to a fixed terminal. The first arc guide may include a first portion and a second portion. The first portion may extend from the fixed terminal in the first direction. The second portion may extend from the first portion in the second direction. The second direction may be the direction from the movable contact to the fixed contact. In this case, the starting point of the arc passes through the first portion and moves to the second portion. Then, the arc is extended in the second part. As a result, the arc is quickly extinguished.
　第２部分は、第２方向へ向かって、固定接点から離れるように第２方向に対して傾斜していてもよい。この場合、アークが第２部分において伸長される。それにより、アークが迅速に消弧される。 The second portion may be inclined with respect to the second direction so as to be away from the fixed contact toward the second direction. In this case, the arc is extended in the second part. As a result, the arc is quickly extinguished.
　第１アークガイドは、可動接触片に接続されてもよい。第１アークガイドは、第３部分と第４部分とを含んでもよい。第３部分は、可動接触片から第１方向へ延びていてもよい。第４部分は、第３部分から第３方向へ延びていてもよい。第３方向は、固定接点から可動接点へ向かう方向であってもよい。この場合、アークの起点は、第３部分を通り、第４部分へ移動する。そして、アークが第４部分において伸長される。それにより、アークが迅速に消弧される。 The first arc guide may be connected to a movable contact piece. The first arc guide may include a third portion and a fourth portion. The third portion may extend in the first direction from the movable contact piece. The fourth portion may extend from the third portion in the third direction. The third direction may be the direction from the fixed contact to the movable contact. In this case, the starting point of the arc passes through the third part and moves to the fourth part. Then, the arc is extended in the fourth part. As a result, the arc is quickly extinguished.
　第４部分は、第３方向へ向かって、可動接点から離れるように第３方向に対して傾斜していてもよい。この場合、アークが第４部分において伸長される。それにより、アークが迅速に消弧される。 The fourth part may be inclined with respect to the third direction so as to be away from the movable contact toward the third direction. In this case, the arc is extended in the fourth part. As a result, the arc is quickly extinguished.
　可動接触片は、第１表面と第２表面とを含んでもよい。第１表面は、固定接点と向かい合っていてもよい。第２表面は、第１表面の反対側に位置してもよい。第１アークガイドは、第２表面に接続されていてもよい。この場合、アークの起点が第２表面へ向かって移動することで、第１アークガイドに到達する。それにより、アーク電流が低下し、消弧のために必要なアーク長が短縮される。 The movable contact piece may include a first surface and a second surface. The first surface may face the fixed contact. The second surface may be located on the opposite side of the first surface. The first arc guide may be connected to the second surface. In this case, the starting point of the arc moves toward the second surface to reach the first arc guide. As a result, the arc current is reduced and the arc length required for extinguishing the arc is shortened.
　第１アークガイドは、通電経路と異なる位置に配置されてもよい。通電経路は、固定端子と固定接点と可動接点と可動接触片とを通ってもよい。この場合、第１アークガイドによる通電経路の電気抵抗への影響が抑えられる。それにより、電磁継電器の通電容量の低下が抑えられる。 The first arc guide may be arranged at a position different from the energization path. The energization path may pass through a fixed terminal, a fixed contact, a movable contact, and a movable contact piece. In this case, the influence of the first arc guide on the electrical resistance of the energization path is suppressed. As a result, a decrease in the energization capacity of the electromagnetic relay can be suppressed.
　第１アークガイドは、固定端子に接続されてもよい。第１材料は，固定端子よりも高い電気抵抗を有してもよい。電磁継電器は、第２アークガイドをさらに備えてもよい。第２アークガイドは、可動接触片に接続されてもよい。第２アークガイドは、可動接触片よりも高い電気抵抗を有する第２材料で形成されてもよい。この場合、第１アークガイドと第２アークガイドとによって、さらにアーク電流が低下する。それにより、消弧のために必要なアーク長がさらに短縮される。 The first arc guide may be connected to a fixed terminal. The first material may have a higher electrical resistance than the fixed terminal. The electromagnetic relay may further include a second arc guide. The second arc guide may be connected to the movable contact piece. The second arc guide may be made of a second material having a higher electrical resistance than the movable contact piece. In this case, the arc current is further reduced by the first arc guide and the second arc guide. As a result, the arc length required for arc extinguishing is further shortened.
　本開示によれば、電磁継電器において、アークを消弧するために必要なアーク長を短縮することができる。 According to the present disclosure, in an electromagnetic relay, the arc length required to extinguish an arc can be shortened.
実施形態に係る電磁継電器の正面断面図である。It is a front sectional view of the electromagnetic relay which concerns on embodiment. 閉状態の電磁継電器の正面断面図である。It is a front sectional view of the electromagnetic relay in a closed state. 図１におけるIII－III断面図である。FIG. 3 is a sectional view taken along line III-III in FIG. 固定端子および可動接触片の拡大図である。It is an enlarged view of a fixed terminal and a movable contact piece. 第１変形例に係る固定端子および可動接触片の拡大図である。It is an enlarged view of the fixed terminal and the movable contact piece which concerns on 1st modification. 第２変形例に係る固定端子および可動接触片の拡大図である。It is an enlarged view of the fixed terminal and the movable contact piece which concerns on the 2nd modification. 第３変形例に係る固定端子および可動接触片の拡大図である。It is an enlarged view of the fixed terminal and the movable contact piece which concerns on 3rd modification. 第４変形例に係る固定端子および可動接触片の拡大図である。It is an enlarged view of the fixed terminal and the movable contact piece which concerns on 4th modification. 第５変形例に係る固定端子および可動接触片の拡大図である。It is an enlarged view of the fixed terminal and the movable contact piece which concerns on 5th modification. 他の実施形態に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on other embodiment.
　以下、本発明の一態様に係る電磁継電器１の実施形態について、図面を参照して説明する。図１は電磁継電器１の正面断面図である。図１に示すように、電磁継電器１は、ハウジング２と、接点装置３と、駆動装置４とを備えている。ハウジング２は、樹脂などの絶縁性を有する材料で形成されている。ただし、ハウジング２は、セラミックなどの他の材料製であってもよい。ハウジング２内には、接点装置３が収容されている。 Hereinafter, an embodiment of the electromagnetic relay 1 according to one aspect of the present invention will be described with reference to the drawings. FIG. 1 is a front sectional view of the electromagnetic relay 1. As shown in FIG. 1, the electromagnetic relay 1 includes a housing 2, a contact device 3, and a drive device 4. The housing 2 is made of an insulating material such as resin. However, the housing 2 may be made of another material such as ceramic. The contact device 3 is housed in the housing 2.
　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、可動機構９と、第１固定接点１０と、第２固定接点１１と、第１可動接点１２と、第２可動接点１３とを含む。なお、理解の容易のため、以下の説明において、第１可動接点１２から第１固定接点１０へ向かう方向が「下方」と定義される。「下方」は、第２方向の一例である。第１固定接点１０から第１可動接点１２へ向かう方向第３方向が「上方」と定義される。「上方」は、第３方向の一例である。可動接触片８が延びる方向が、左右方向と定義される。第２固定接点１１から第１固定接点１０へ向かう方向が左方と定義される。第１固定接点１０から第２固定接点１１へ向かう方向が右方と定義される。 The contact device 3 includes a first fixed terminal 6, a second fixed terminal 7, a movable contact piece 8, a movable mechanism 9, a first fixed contact 10, a second fixed contact 11, and a first movable contact 12. , The second movable contact 13 and the like. For ease of understanding, the direction from the first movable contact 12 to the first fixed contact 10 is defined as "downward" in the following description. "Down" is an example of the second direction. The third direction from the first fixed contact 10 to the first movable contact 12 is defined as "upward". "Upper" is an example of the third direction. The direction in which the movable contact piece 8 extends is defined as the left-right direction. The direction from the second fixed contact 11 to the first fixed contact 10 is defined as the left side. The direction from the first fixed contact 10 to the second fixed contact 11 is defined as the right side.
　第１固定端子６と、第２固定端子７と、可動接触片８と、第１固定接点１０と、第２固定接点１１と、第１可動接点１２と、第２可動接点１３とは、導電性を有する材料で形成されている。例えば、第１固定端子６と、第２固定端子７と、可動接触片８とは、リン青銅、ベリリウム銅、黄銅、或いはタフピッチ銅などの端子材として公知の金属材料製である。ただし、第１固定端子６と、第２固定端子７と、可動接触片８とは、これらと異なる材料製であってもよい。第１固定接点１０と、第２固定接点１１と、第１可動接点１２と、第２可動接点１３とは、銅系金属、或いは銀系金属などの接点材として公知の金属材料製である。 The first fixed terminal 6, the second fixed terminal 7, the movable contact piece 8, the first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are conductive. It is made of a material having sex. For example, the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 are made of a metal material known as a terminal material such as phosphor bronze, beryllium copper, brass, or tough pitch copper. However, the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 may be made of different materials. The first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are made of a metal material known as a contact material such as a copper-based metal or a silver-based metal.
　第１固定端子６と第２固定端子７とは、上下方向に延びている。第１固定端子６と第２固定端子７とは、左右方向に互いに間隔を隔てて配置されている。第１固定端子６には、第１固定接点１０が接続されている。第２固定端子７には、第２固定接点１１が接続されている。第１固定接点１０と第２固定接点１１とは、ハウジング２内に配置されている。 The first fixed terminal 6 and the second fixed terminal 7 extend in the vertical direction. The first fixed terminal 6 and the second fixed terminal 7 are arranged so as to be spaced apart from each other in the left-right direction. The first fixed contact 10 is connected to the first fixed terminal 6. A second fixed contact 11 is connected to the second fixed terminal 7. The first fixed contact 10 and the second fixed contact 11 are arranged in the housing 2.
　可動接触片８は、ハウジング２内に配置されている。可動接触片８には、第１可動接点１２と第２可動接点１３とが接続されている。第１可動接点１２は、第１固定接点１０に向かい合っている。第２可動接点１３は、第２固定接点１１に向かい合っている。第１可動接点１２は、第２可動接点１３と左右方向に間隔を隔てて配置されている。 The movable contact piece 8 is arranged in the housing 2. The first movable contact 12 and the second movable contact 13 are connected to the movable contact piece 8. The first movable contact 12 faces the first fixed contact 10. The second movable contact 13 faces the second fixed contact 11. The first movable contact 12 is arranged at a distance from the second movable contact 13 in the left-right direction.
　可動接触片８は、上下方向に移動可能である。可動接触片８は、閉位置と開位置とに移動可能である。図１に示すように、可動接触片８が開位置で、可動接点１２，１３は、固定接点１０，１１から離れている。図２に示すように、可動接触片８が閉位置で、可動接点１２，１３は、固定接点１０，１１に接触している。本実施形態において、可動接点１２，１３が、固定接点１０，１１に近づく方向が接触方向と定義される。可動接点１２，１３が、固定接点１０，１１から離れる方向が開離方向と定義される。 The movable contact piece 8 can move up and down. The movable contact piece 8 can move between the closed position and the open position. As shown in FIG. 1, the movable contact piece 8 is in the open position, and the movable contacts 12 and 13 are separated from the fixed contacts 10 and 11. As shown in FIG. 2, the movable contact piece 8 is in the closed position, and the movable contacts 12 and 13 are in contact with the fixed contacts 10 and 11. In the present embodiment, the direction in which the movable contacts 12 and 13 approach the fixed contacts 10 and 11 is defined as the contact direction. The direction in which the movable contacts 12 and 13 are separated from the fixed contacts 10 and 11 is defined as the opening direction.
　可動機構９は、可動接触片８を支持する。可動機構９は、駆動軸１５と接点バネ１６とを含む。駆動軸１５は、可動接触片８に連結される。駆動軸１５は、上下方向に延びており、可動接触片８を上下方向に貫通している。駆動軸１５は、上下方向に移動可能に設けられる。接点バネ１６は、可動接触片８を接触方向へ向けて付勢する。 The movable mechanism 9 supports the movable contact piece 8. The movable mechanism 9 includes a drive shaft 15 and a contact spring 16. The drive shaft 15 is connected to the movable contact piece 8. The drive shaft 15 extends in the vertical direction and penetrates the movable contact piece 8 in the vertical direction. The drive shaft 15 is provided so as to be movable in the vertical direction. The contact spring 16 urges the movable contact piece 8 toward the contact direction.
　駆動装置４は、コイル２１と、スプール２２と、可動鉄心２３と、固定鉄心２４と、ヨーク２５と、復帰バネ２６とを含む。駆動装置４は、電磁力によって、可動機構９を介して可動接触片８を開位置と閉位置とに移動させる。コイル２１は、スプール２２に巻回されている。可動鉄心２３と、固定鉄心２４とは、スプール２２内に配置されている。可動鉄心２３は、駆動軸１５に接続されている。可動鉄心２３は、上下方向に移動可能である。固定鉄心２４は、可動鉄心２３と向かい合って配置されている。復帰バネ２６は、可動鉄心２３を開離方向に付勢している。 The drive device 4 includes a coil 21, a spool 22, a movable iron core 23, a fixed iron core 24, a yoke 25, and a return spring 26. The drive device 4 moves the movable contact piece 8 between the open position and the closed position via the movable mechanism 9 by an electromagnetic force. The coil 21 is wound around the spool 22. The movable core 23 and the fixed core 24 are arranged in the spool 22. The movable iron core 23 is connected to the drive shaft 15. The movable iron core 23 is movable in the vertical direction. The fixed iron core 24 is arranged so as to face the movable iron core 23. The return spring 26 urges the movable iron core 23 in the opening direction.
　電磁継電器１では、コイル２１が通電されると、コイル２１から発生する磁界による磁力によって、可動鉄心２３が固定鉄心２４に吸引される。それにより、可動鉄心２３と駆動軸１５とが、復帰バネ２６の付勢力に抗して、接触方向に移動する。それにより、可動接触片８が、図２に示す閉位置へ移動し、可動接点１２，１３が固定接点１０，１１に接触する。なお、可動接点１２，１３が固定接点１０，１１に接触した後、駆動軸１５がさらに接触方向へ移動することによって、接点バネ１６が圧縮される。 In the electromagnetic relay 1, when the coil 21 is energized, the movable iron core 23 is attracted to the fixed core 24 by the magnetic force generated by the magnetic field generated from the coil 21. As a result, the movable iron core 23 and the drive shaft 15 move in the contact direction against the urging force of the return spring 26. As a result, the movable contact piece 8 moves to the closed position shown in FIG. 2, and the movable contacts 12 and 13 come into contact with the fixed contacts 10 and 11. After the movable contacts 12 and 13 come into contact with the fixed contacts 10 and 11, the drive shaft 15 further moves in the contact direction, so that the contact spring 16 is compressed.
　コイル２１への通電がオフにされると、可動鉄心２３と駆動軸１５とが、復帰バネ２６の付勢力によって、開離方向へ移動する。それにより、可動接触片８が図１に示す開位置へ移動し、可動接点１２，１３が固定接点１０，１１から離れる。 When the energization to the coil 21 is turned off, the movable iron core 23 and the drive shaft 15 move in the opening direction by the urging force of the return spring 26. As a result, the movable contact piece 8 moves to the open position shown in FIG. 1, and the movable contacts 12 and 13 are separated from the fixed contacts 10 and 11.
　図３は、図１におけるIII－III断面図である。図３に示すように、電磁継電器１は、磁石２７，２８を備えている。磁石２７，２８は、永久磁石である。ただし、磁石２７，２８の一方は、ヨークであってもよい。磁石２７，２８は、ハウジング２の周囲に配置される。磁石２７，２８は、接点１０－１３において発生するアークの起点を、磁力によって所定方向に向かって移動させるように配置される。 FIG. 3 is a sectional view taken along line III-III in FIG. As shown in FIG. 3, the electromagnetic relay 1 includes magnets 27 and 28. The magnets 27 and 28 are permanent magnets. However, one of the magnets 27 and 28 may be a yoke. The magnets 27 and 28 are arranged around the housing 2. The magnets 27 and 28 are arranged so that the starting point of the arc generated at the contacts 10-13 is moved in a predetermined direction by a magnetic force.
　図３に示すように、磁石２７，２８は、ハウジング２内に磁界を発生させる。図３において、二点鎖線の矢印は、磁界の向きを示している。この磁界により、第１固定接点１０と第１可動接点１２とに生じるアークに第１ローレンツ力Ｆ１が作用する。それにより、アークの起点が、第１ローレンツ力Ｆ１の方向に移動する。また、アークが、第１ローレンツ力Ｆ１の方向に伸長される。同様に、第２固定接点１１と第２可動接点１３とに生じるアークにローレンツ力Ｆ２が作用する。それにより、アークの起点が、ローレンツ力Ｆ２の方向に移動する。また、アークが、ローレンツ力Ｆ２の方向に伸長される。図３において、矢印Ｆ１，Ｆ２は、電流が、第１固定端子６から、可動接触片８を経て、第２固定端子７へ流れるときのローレンツ力を示している。本実施形態において、第１ローレンツ力Ｆ１は、左方を向いている。第１ローレンツ力Ｆ１の方向、すなわち「左方」は、第１方向の一例である。ローレンツ力Ｆ２は、右方を向いている。 As shown in FIG. 3, the magnets 27 and 28 generate a magnetic field in the housing 2. In FIG. 3, the dashed arrow indicates the direction of the magnetic field. Due to this magnetic field, the first Lorentz force F1 acts on the arc generated in the first fixed contact 10 and the first movable contact 12. As a result, the starting point of the arc moves in the direction of the first Lorentz force F1. Further, the arc is extended in the direction of the first Lorentz force F1. Similarly, the Lorentz force F2 acts on the arc generated in the second fixed contact 11 and the second movable contact 13. As a result, the starting point of the arc moves in the direction of the Lorentz force F2. Further, the arc is extended in the direction of the Lorentz force F2. In FIG. 3, arrows F1 and F2 indicate the Lorentz force when a current flows from the first fixed terminal 6 to the second fixed terminal 7 via the movable contact piece 8. In the present embodiment, the first Lorentz force F1 faces to the left. The direction of the first Lorentz force F1, that is, "left" is an example of the first direction. The Lorentz force F2 is facing to the right.
　図４は、第１固定端子６と第２固定端子７と可動接触片８の拡大図である。図４に示すように、電磁継電器１は、第１アークガイド３１と、第２アークガイド３２と、第３アークガイド３３と、第４アークガイド３４とを備えている。図４において破線は、アークを示している。第１－第４アークガイド３１－３４は、第１固定端子６、第２固定端子７、及び可動接触片８と異なる材料製である。第１－第４アークガイド３１－３４は、第１固定端子６、第２固定端子７、及び可動接触片８よりも高い電気抵抗を有する第１材料で形成される。例えば、第１材料は、銅ニッケル合金、銅マンガン合金、ニッケルクロム、鉄クロム、或いはｓｕｓ３０４のいずれかである。これらの材料は、上述した端子材よりも高い体積低効率を有している。 FIG. 4 is an enlarged view of the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8. As shown in FIG. 4, the electromagnetic relay 1 includes a first arc guide 31, a second arc guide 32, a third arc guide 33, and a fourth arc guide 34. In FIG. 4, the broken line indicates an arc. The first to fourth arc guides 31-34 are made of different materials from the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8. The first to fourth arc guides 31-34 are formed of a first material having a higher electrical resistance than the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8. For example, the first material is either a copper nickel alloy, a copper manganese alloy, nickel chromium, iron chromium, or sus304. These materials have higher volume and lower efficiency than the terminal materials described above.
　第１－第４アークガイド３１－３４は、通電経路Ｒ１と異なる位置に配置される。図２に示すように、通電経路Ｒ１は、固定端子６，７と固定接点１０，１１と可動接点１２，１３と可動接触片８とを通る電流の経路である。第１－第４アークガイド３１－３４は、左右方向において通電経路Ｒ１の外側に配置されている。 The 1st to 4th arc guides 31-34 are arranged at positions different from the energization path R1. As shown in FIG. 2, the energization path R1 is a path of electric current passing through the fixed terminals 6 and 7, the fixed contacts 10 and 11, the movable contacts 12 and 13, and the movable contact piece 8. The first to fourth arc guides 31-34 are arranged outside the energization path R1 in the left-right direction.
　第１アークガイド３１は、第１固定端子６に接続されている。第１アークガイド３１は、屈曲した形状を有する。第１アークガイド３１は、第１部分３５と第２部分３６とを含む。第１部分３５は、第１固定端子６から左方へ、すなわち、第１ローレンツ力Ｆ１の方向へ延びている。第２部分３６は、第１部分３５から上方へ延びている。 The first arc guide 31 is connected to the first fixed terminal 6. The first arc guide 31 has a bent shape. The first arc guide 31 includes a first portion 35 and a second portion 36. The first portion 35 extends from the first fixed terminal 6 to the left, that is, in the direction of the first Lorentz force F1. The second portion 36 extends upward from the first portion 35.
　第２アークガイド３２は、可動接触片８に接続されている。第２アークガイド３２は、屈曲した形状を有している。第２アークガイド３２は、第３部分３７と第４部分３８とを含む。第３部分３７は、可動接触片８から左方へ、すなわち、第１ローレンツ力Ｆ１の方向へ延びている。第４部分３８は、第３部分３７から下方へ延びている。第４部分３８は、下方へ向かって、第１可動接点１２から離れるように、上下方向に対して傾斜している。 The second arc guide 32 is connected to the movable contact piece 8. The second arc guide 32 has a bent shape. The second arc guide 32 includes a third portion 37 and a fourth portion 38. The third portion 37 extends from the movable contact piece 8 to the left, that is, in the direction of the first Lorentz force F1. The fourth portion 38 extends downward from the third portion 37. The fourth portion 38 is inclined downward with respect to the vertical direction so as to be separated from the first movable contact 12.
　第３アークガイド３３は、第２固定端子７に接続されている。第３アークガイド３３は、第１アークガイド３１と左右対称な形状を有している。第３アークガイド３３は、第５部分３９と第６部分４０とを含む。第５部分３９と第６部分４０とは、それぞれ第１部分３５と第２部分３６と左右対称な形状を有している。第４アークガイド３４は、可動接触片８に接続されている。第４アークガイド３４は、第２アークガイド３２と左右対称な形状を有している。第４アークガイド３４は、第７部分４１と第８部分４２とを含む。第７部分４１と第８部分４２とは、それぞれ第３部分３７と第４部分３８と左右対称な形状を有している。 The third arc guide 33 is connected to the second fixed terminal 7. The third arc guide 33 has a shape symmetrical to that of the first arc guide 31. The third arc guide 33 includes a fifth portion 39 and a sixth portion 40. The fifth portion 39 and the sixth portion 40 have symmetrical shapes with the first portion 35 and the second portion 36, respectively. The fourth arc guide 34 is connected to the movable contact piece 8. The fourth arc guide 34 has a shape symmetrical to that of the second arc guide 32. The fourth arc guide 34 includes a seventh portion 41 and an eighth portion 42. The seventh portion 41 and the eighth portion 42 have symmetrical shapes with the third portion 37 and the fourth portion 38, respectively.
　以上説明した本実施形態に係る電磁継電器１では、第１－第４アークガイド３１－３４は、第１固定端子６、第２固定端子７、及び可動接触片８よりも高い電気抵抗を有する第１材料で形成される。そのため、アークの起点が第１－第４アークガイド３１－３４へ移動したときに、アーク電流が低下する。それにより、消弧のために必要なアーク長が短縮される。また、アークエネルギーが低下することで、接点装置３へのダメージが軽減される。 In the electromagnetic relay 1 according to the present embodiment described above, the first to fourth arc guides 31-34 have higher electrical resistance than the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8. It is made of one material. Therefore, when the starting point of the arc moves to the first to fourth arc guides 31-34, the arc current decreases. As a result, the arc length required for arc extinguishing is shortened. Further, the damage to the contact device 3 is reduced by reducing the arc energy.
　さらに、第１－第４アークガイド３１－３４は、通電経路Ｒ１から外れた位置に配置される。そのため、通電経路Ｒ１における電気抵抗への影響が抑えられる。それにより、電磁継電器１の通電容量の低下が抑えられる。 Further, the 1st to 4th arc guides 31-34 are arranged at positions deviating from the energization path R1. Therefore, the influence on the electric resistance in the energization path R1 is suppressed. As a result, a decrease in the energization capacity of the electromagnetic relay 1 can be suppressed.
　以上、本発明の一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。接点装置の構成は、上記の実施形態のものに限らず、変更されてもよい。 Although one embodiment 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. The configuration of the contact device is not limited to that of the above embodiment, and may be changed.
　例えば、可動接触片８の形状が変更されてもよい。第１可動接点１２と第２可動接点１３とは、可動接触片８と一体であってもよい。固定端子６，７の形状が変更されてもよい。第１固定接点１０は、第１固定端子６と一体であってもよい。第２固定接点１１は、第２固定端子７と一体であってもよい。可動接点の数は、２つに限らず、２つより多くてもよい。固定接点の数は、２つに限らず、２つより多くてもよい。可動機構９の構成は、上記の実施形態のものに限らず、変更されてもよい。駆動装置４の構成は、上記の実施形態のものに限らず、変更されてもよい。 For example, the shape of the movable contact piece 8 may be changed. The first movable contact 12 and the second movable contact 13 may be integrated with the movable contact piece 8. The shapes of the fixed terminals 6 and 7 may be changed. The first fixed contact 10 may be integrated with the first fixed terminal 6. The second fixed contact 11 may be integrated with the second fixed terminal 7. The number of movable contacts is not limited to two, and may be more than two. The number of fixed contacts is not limited to two, and may be more than two. The configuration of the movable mechanism 9 is not limited to that of the above embodiment, and may be changed. The configuration of the drive device 4 is not limited to that of the above embodiment, and may be changed.
　磁石２７，２８の配置、或いは磁石２７，２８による磁界の配置は、上記の実施形態のものに限らず、変更されてもよい。磁石２７，２８は、省略されてもよい。その場合、通電経路Ｒ１を流れる電流によって発生する磁界、或いは、アークに発生する磁界によって、ローレンツ力が発生してもよい。 The arrangement of the magnets 27 and 28 or the arrangement of the magnetic field by the magnets 27 and 28 is not limited to that of the above embodiment, and may be changed. The magnets 27 and 28 may be omitted. In that case, the Lorentz force may be generated by the magnetic field generated by the current flowing through the energization path R1 or by the magnetic field generated in the arc.
　第１－第４アークガイド３１－３４の材料は、互いに異なっていてもよい。例えば、第２アークガイド３２は、第２材料で形成されてもよい。第２材料は、第１材料と同様に、固定端子６，７及び可動接触片８よりも高い電気抵抗を有する。第２材料は、第１材料と異なってもよい。 The materials of the 1st to 4th arc guides 31-34 may be different from each other. For example, the second arc guide 32 may be made of a second material. The second material, like the first material, has higher electrical resistance than the fixed terminals 6 and 7 and the movable contact piece 8. The second material may be different from the first material.
　アークガイドの形状、或いは配置は、上記の実施形態のものに限らず、変更されてもよい。例えば、図５は、第１変形例に係る固定端子６，７と可動接触片８との拡大図である。図５に示すように、第２アークガイド３２と第４アークガイド３４とは省略されてもよい。すなわち、固定端子６，７のみにアークガイドが設けられ、可動接触片８にはアークガイドが設けられなくてもよい。或いは、図６は、第２変形例に係る固定端子６，７と可動接触片８との拡大図である。図６に示すように、第１アークガイド３１と第３アークガイド３３とは省略されてもよい。すなわち、可動接触片８のみにアークガイドが設けられ、固定端子６，７にはアークガイドが設けられなくてもよい。 The shape or arrangement of the arc guide is not limited to that of the above embodiment, and may be changed. For example, FIG. 5 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the first modification. As shown in FIG. 5, the second arc guide 32 and the fourth arc guide 34 may be omitted. That is, the arc guide may be provided only on the fixed terminals 6 and 7, and the arc guide may not be provided on the movable contact piece 8. Alternatively, FIG. 6 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the second modification. As shown in FIG. 6, the first arc guide 31 and the third arc guide 33 may be omitted. That is, the arc guide may be provided only on the movable contact piece 8, and the arc guide may not be provided on the fixed terminals 6 and 7.
　アークガイドは、屈曲した形状に限らず、他の形状であってもよい。例えば、図７は、第３変形例に係る固定端子６，７と可動接触片８との拡大図である。図７に示すように、第１アークガイド３１と第３アークガイド３３とは、角柱状の形状を有してもよい。或いは、第２アークガイド３２と第４アークガイド３４とが、角柱状の形状を有してもよい。 The arc guide is not limited to a bent shape, but may have another shape. For example, FIG. 7 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the third modification. As shown in FIG. 7, the first arc guide 31 and the third arc guide 33 may have a prismatic shape. Alternatively, the second arc guide 32 and the fourth arc guide 34 may have a prismatic shape.
　或いは、図８は、第４変形例に係る固定端子６，７と可動接触片８との拡大図である。図８に示すように、第２アークガイド３２と第４アークガイド３４とは、板状の形状を有してもよい。詳細には、可動接触片８は、第１表面８１と第２表面８２とを含む。第１表面８１は、第１固定接点１０及び第２固定接点１１と向かい合っている。第１可動接点１２と第２可動接点１３とは、第１表面８１に接続されている。第２表面８２は、第１表面８１の反対側に位置する。第２アークガイド３２と第４アークガイド３４とは、第２表面８２に接続されてもよい。 Alternatively, FIG. 8 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the fourth modification. As shown in FIG. 8, the second arc guide 32 and the fourth arc guide 34 may have a plate-like shape. Specifically, the movable contact piece 8 includes a first surface 81 and a second surface 82. The first surface 81 faces the first fixed contact 10 and the second fixed contact 11. The first movable contact 12 and the second movable contact 13 are connected to the first surface 81. The second surface 82 is located on the opposite side of the first surface 81. The second arc guide 32 and the fourth arc guide 34 may be connected to the second surface 82.
　図９は、第５変形例に係る固定端子６，７と可動接触片８との拡大図である。図９に示すように、第１アークガイド３１の第２部分３６は、上方へ向かって、第１固定接点１０から離れるように、上下方向に対して傾斜していてもよい。第３アークガイド３３の第６部分４０は、上方へ向かって、第２固定接点１１から離れるように、上下方向に対して傾斜していてもよい。 FIG. 9 is an enlarged view of the fixed terminals 6 and 7 and the movable contact piece 8 according to the fifth modification. As shown in FIG. 9, the second portion 36 of the first arc guide 31 may be inclined in the vertical direction so as to move upward and away from the first fixed contact 10. The sixth portion 40 of the third arc guide 33 may be inclined in the vertical direction so as to move upward and away from the second fixed contact 11.
　上記の実施形態に係る電磁継電器１は、いわゆるプランジャ型の電磁継電器である。しかし、電磁継電器は、他の種類のものであってもよい。例えば、図１０は、変形例に係る電磁継電器１００を示す図である。変形例に係る電磁継電器１００は、いわゆるヒンジ型の電磁継電器である。変形例に係る電磁継電器１００は、固定端子１０１と、可動接触片１０２と、固定接点１０３と、可動接点１０４と、駆動装置１０５と、ベース１０６とを備えている。固定端子１０１と、可動接触片１０２と、駆動装置１０５とは、ベース１０６に支持されている。固定接点１０３は、固定端子１０１に接続されている。可動接点１０４は、可動接触片１０２に接続されている。固定端子１０１と可動接触片１０２とは、上述した端子材製である。 The electromagnetic relay 1 according to the above embodiment is a so-called plunger type electromagnetic relay. However, the electromagnetic relay may be of another type. For example, FIG. 10 is a diagram showing an electromagnetic relay 100 according to a modified example. The electromagnetic relay 100 according to the modified example is a so-called hinge type electromagnetic relay. The electromagnetic relay 100 according to the modified example includes a fixed terminal 101, a movable contact piece 102, a fixed contact 103, a movable contact 104, a drive device 105, and a base 106. The fixed terminal 101, the movable contact piece 102, and the drive device 105 are supported by the base 106. The fixed contact 103 is connected to the fixed terminal 101. The movable contact 104 is connected to the movable contact piece 102. The fixed terminal 101 and the movable contact piece 102 are made of the terminal material described above.
　駆動装置１０５は、コイル１０７と、ボビン１０８と、鉄心１０９と、可動片１１０と、カード１１１と、ヨーク１１２を含む。コイル１０７はボビン１０８に巻回されている。鉄心１０９は、ボビン１０８内に配置されている。ヨーク１１２は、鉄心１０９に接続されている。コイル１０７が励磁されることで、可動片１１０は、磁力により、鉄心１０９に吸着される。カード１１１は、可動片１１０に押圧されることで、可動接触片１０２を押圧する。可動接触片１０２は、カード１１１によって押圧されることで、接触方向へ移動する。それにより、可動接点１０４が固定接点１０３に接触する。コイル１０７が消磁されると、可動接触片１０２の弾性力、或いは図示しない復帰バネの付勢力により、可動接触片１０２は、開離方向へ移動する。それにより、可動接点１０４が固定接点１０３から離れる。 The drive device 105 includes a coil 107, a bobbin 108, an iron core 109, a movable piece 110, a card 111, and a yoke 112. The coil 107 is wound around the bobbin 108. The iron core 109 is arranged in the bobbin 108. The yoke 112 is connected to the iron core 109. When the coil 107 is excited, the movable piece 110 is attracted to the iron core 109 by the magnetic force. The card 111 presses the movable contact piece 102 by being pressed by the movable piece 110. The movable contact piece 102 moves in the contact direction when pressed by the card 111. As a result, the movable contact 104 comes into contact with the fixed contact 103. When the coil 107 is degaussed, the movable contact piece 102 moves in the opening direction due to the elastic force of the movable contact piece 102 or the urging force of the return spring (not shown). As a result, the movable contact 104 is separated from the fixed contact 103.
　変形例に係る電磁継電器１００は、アークガイド１１３を備えている。アークガイド１１３は、上述した実施形態の第１－第４アークガイド３１－３４と同様に、固定端子１０１及び可動接触片１０２よりも電気抵抗の高い材料製である。アークガイド１１３は、第１部分１１４と第２部分１１５とを含む。第１部分１１４は、可動接触片１０２から上方へ延びている。変形例に係る電磁継電器１００では、可動接点１０４と固定接点１０３とに電流が流れたときには、上方へ向かうローレンツ力が発生する。第２部分１１５は、第１部分１１４から駆動装置１０５側へ延びている。すなわち、第２部分１１５は、固定接点１０３から可動接点１０４へ向かう方向へ延びている。変形例に係る電磁継電器１００においても、上述した実施形態に係る電磁継電器１と同様に、アークの起点がアークガイド１１３へ移動したときに、アーク電流が低下する。それにより、消弧のために必要なアーク長が短縮される。 The electromagnetic relay 100 according to the modified example includes an arc guide 113. The arc guide 113 is made of a material having a higher electric resistance than the fixed terminal 101 and the movable contact piece 102, similarly to the first to fourth arc guides 31-34 of the above-described embodiment. The arc guide 113 includes a first portion 114 and a second portion 115. The first portion 114 extends upward from the movable contact piece 102. In the electromagnetic relay 100 according to the modified example, when a current flows through the movable contact 104 and the fixed contact 103, an upward Lorentz force is generated. The second portion 115 extends from the first portion 114 toward the drive device 105. That is, the second portion 115 extends from the fixed contact 103 toward the movable contact 104. Also in the electromagnetic relay 100 according to the modified example, the arc current decreases when the starting point of the arc moves to the arc guide 113, as in the electromagnetic relay 1 according to the above-described embodiment. As a result, the arc length required for arc extinguishing is shortened.
　本開示によれば、電磁継電器において、アークを消弧するために必要なアーク長を短縮することができる。 According to the present disclosure, in an electromagnetic relay, the arc length required to extinguish an arc can be shortened.
４　　駆動装置
６　　第１固定端子
８　　可動接触片
１０　第１固定接点
１２　第１可動接点
３１　第１アークガイド
３５　第１部分
３６　第２部分
３７　第３部分
３８　第４部分
８１　第１表面
８２　第２表面 4 Drive device 6 1st fixed terminal 8 Movable contact piece 10 1st fixed contact 12 1st movable contact 31 1st arc guide 35 1st part 36 2nd part 37 3rd part 38 4th part 81 1st surface 82 2nd surface

Claims (9)

  1. 　固定端子と、
    　前記固定端子に接続された固定接点と、
    　可動接触片と、
    　前記固定接点と向かい合い、前記可動接触片に接続された可動接点と、
    　閉位置と開位置とに前記可動接触片を移動させ、前記可動接触片が前記閉位置において前記可動接点が前記固定接点に接触し、可動接触片が前記開位置において前記可動接点が前記固定接点から離れる、駆動装置と、
    　前記固定端子、又は、前記可動接触片に接続された第１アークガイドと、
    を備え
    　前記第１アークガイドは、前記第１アークガイドが接続された前記固定端子、又は、前記可動接触片よりも高い電気抵抗を有する第１材料で形成される、
    電磁継電器。     With fixed terminals
    With the fixed contact connected to the fixed terminal,
    Movable contact pieces and
    A movable contact facing the fixed contact and connected to the movable contact piece,
    The movable contact piece is moved between the closed position and the open position, the movable contact piece is in contact with the fixed contact in the closed position, and the movable contact piece is in contact with the fixed contact in the open position. Away from the drive and
    With the first arc guide connected to the fixed terminal or the movable contact piece,
    The first arc guide is formed of the fixed terminal to which the first arc guide is connected, or a first material having a higher electric resistance than the movable contact piece.
    Electromagnetic relay.
  2. 　前記第１アークガイドは、前記可動接点と前記固定接点とを流れる電流によりアークにローレンツ力が作用する第１方向へ延びている、
    請求項１に記載の電磁継電器。     The first arc guide extends in the first direction in which Lorentz force acts on the arc due to the current flowing between the movable contact and the fixed contact.
    The electromagnetic relay according to claim 1.
  3. 　前記第１アークガイドは、前記固定端子に接続されており、
    　前記第１アークガイドは、
    　　前記固定端子から前記第１方向へ延びる第１部分と、
    　　前記可動接点から前記固定接点へ向かう第２方向へ、前記第１部分から延びる第２部分と、
    　を含む、
    請求項２に記載の電磁継電器。     The first arc guide is connected to the fixed terminal and is connected to the fixed terminal.
    The first arc guide is
    A first portion extending from the fixed terminal in the first direction,
    A second portion extending from the first portion in a second direction from the movable contact to the fixed contact,
    including,
    The electromagnetic relay according to claim 2.
  4. 　前記第２部分は、前記第２方向へ向かって、前記固定接点から離れるように前記第２方向に対して傾斜している、
    請求項３に記載の電磁継電器。     The second portion is inclined with respect to the second direction toward the second direction and away from the fixed contact.
    The electromagnetic relay according to claim 3.
  5. 　前記第１アークガイドは、前記可動接触片に接続されており、
    　前記第１アークガイドは、
    　　前記可動接触片から前記第１方向へ延びる第３部分と、
    　　前記固定接点から前記可動接点へ向かう第３方向へ、前記第３部分から延びる第４部分と、
    　を含む、
    請求項２に記載の電磁継電器。     The first arc guide is connected to the movable contact piece and is connected to the movable contact piece.
    The first arc guide is
    A third portion extending from the movable contact piece in the first direction,
    A fourth portion extending from the third portion in a third direction from the fixed contact to the movable contact,
    including,
    The electromagnetic relay according to claim 2.
  6. 　前記第４部分は、前記第３方向へ向かって、前記可動接点から離れるように前記第３方向に対して傾斜している、
    請求項５に記載の電磁継電器。     The fourth portion is inclined with respect to the third direction toward the third direction and away from the movable contact.
    The electromagnetic relay according to claim 5.
  7. 　前記可動接触片は、
    　　前記固定接点と向かい合う第１表面と
    　　前記第１表面の反対側に位置する第２表面と、
    　を含み、
    　前記第１アークガイドは、前記第２表面に接続されている、
    請求項１に記載の電磁継電器。     The movable contact piece is
    A first surface facing the fixed contact and a second surface located on the opposite side of the first surface.
    Including
    The first arc guide is connected to the second surface.
    The electromagnetic relay according to claim 1.
  8. 　前記第１アークガイドは、前記固定端子と前記固定接点と前記可動接点と前記可動接触片とを通る通電経路と異なる位置に配置される、
    請求項１から７のいずれかに記載の電磁継電器。     The first arc guide is arranged at a position different from the energization path passing through the fixed terminal, the fixed contact, the movable contact, and the movable contact piece.
    The electromagnetic relay according to any one of claims 1 to 7.
  9. 　前記第１アークガイドは、前記固定端子に接続され、
    　前記第１材料は、前記固定端子よりも高い電気抵抗を有し、
    　前記可動接触片に接続され、前記可動接触片よりも高い電気抵抗を有する第２材料で形成された第２アークガイドをさらに備える、
    請求項１に記載の電磁継電器。
          The first arc guide is connected to the fixed terminal and is connected to the fixed terminal.
    The first material has a higher electrical resistance than the fixed terminal and has a higher electrical resistance.
    Further comprising a second arc guide connected to the movable contact piece and made of a second material having a higher electrical resistance than the movable contact piece.
    The electromagnetic relay according to claim 1.
PCT/JP2021/032332 2020-10-26 2021-09-02 Electromagnetic relay WO2022091574A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2020178763A JP2022069864A (en) 2020-10-26 2020-10-26 Electromagnetic relay
JP2020-178763 2020-10-26

Publications (1)

Publication Number Publication Date
WO2022091574A1 true WO2022091574A1 (en) 2022-05-05

Family

ID=81384014

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2021/032332 WO2022091574A1 (en) 2020-10-26 2021-09-02 Electromagnetic relay

Country Status (2)

Country Link
JP (1) JP2022069864A (en)
WO (1) WO2022091574A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4261868A4 (en) * 2020-12-09 2024-05-08 Panasonic Ip Man Co Ltd Contact apparatus and electromagnetic relay

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013222559A (en) * 2012-04-13 2013-10-28 Fuji Electric Co Ltd Contact device and electromagnetic switch using the same
JP2013222562A (en) * 2012-04-13 2013-10-28 Fuji Electric Fa Components & Systems Co Ltd Contact device and electromagnetic switch using the same
WO2017159442A1 (en) * 2016-03-14 2017-09-21 三菱電機株式会社 Switch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3033379B2 (en) * 1992-06-25 2000-04-17 松下電工株式会社 Sealed contact device
JP3321963B2 (en) * 1994-02-22 2002-09-09 株式会社デンソー Plunger type electromagnetic relay
JP5890112B2 (en) * 2011-06-07 2016-03-22 富士通コンポーネント株式会社 Electromagnetic relay
JP6403476B2 (en) * 2014-07-28 2018-10-10 富士通コンポーネント株式会社 Electromagnetic relay
DE102015000796B4 (en) * 2015-01-22 2017-03-02 Schaltbau Gmbh Switching device with permanent magnetic arc extinguishing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013222559A (en) * 2012-04-13 2013-10-28 Fuji Electric Co Ltd Contact device and electromagnetic switch using the same
JP2013222562A (en) * 2012-04-13 2013-10-28 Fuji Electric Fa Components & Systems Co Ltd Contact device and electromagnetic switch using the same
WO2017159442A1 (en) * 2016-03-14 2017-09-21 三菱電機株式会社 Switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4261868A4 (en) * 2020-12-09 2024-05-08 Panasonic Ip Man Co Ltd Contact apparatus and electromagnetic relay

Also Published As

Publication number Publication date
JP2022069864A (en) 2022-05-12

Similar Documents

Publication Publication Date Title
US10199193B2 (en) Electromagnetic relay
US11791119B2 (en) Relay
JP6411436B2 (en) relay
JP2012199117A (en) Contact device and electromagnetic switching device using the same
CN116682701A (en) Contact device and electromagnetic relay
WO2022091574A1 (en) Electromagnetic relay
JP5549642B2 (en) relay
JP4826616B2 (en) Electromagnetic relay
CN112912985A (en) Contact device
JP2006196372A (en) Power relay
US11373830B2 (en) Electromagnetic relay to ensure stable energization even when contact is dissolved
JP2022139817A (en) electromagnetic relay
JP2012199138A (en) Contact device and electromagnetic switch device using the same
WO2020148994A1 (en) Relay
WO2022185746A1 (en) Electromagnetic relay
WO2021181876A1 (en) Electromagnetic relay
US20240096580A1 (en) Electromagnetic relay
JP7135876B2 (en) relay
WO2020110912A1 (en) Contact device
JP2012199142A (en) Contact device and electromagnetic switching device using the same
JP7107169B2 (en) relay
JP5546932B2 (en) Electromagnetic relay
JP2016072022A (en) Contact device
JP2022021236A (en) Electromagnetic relay
JP2012199141A (en) Contact device and electromagnetic switching device using the same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21885693

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21885693

Country of ref document: EP

Kind code of ref document: A1