WO2020080019A1 - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
WO2020080019A1
WO2020080019A1 PCT/JP2019/036492 JP2019036492W WO2020080019A1 WO 2020080019 A1 WO2020080019 A1 WO 2020080019A1 JP 2019036492 W JP2019036492 W JP 2019036492W WO 2020080019 A1 WO2020080019 A1 WO 2020080019A1
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WO
WIPO (PCT)
Prior art keywords
contact
housing
yoke
exposed
electromagnetic relay
Prior art date
Application number
PCT/JP2019/036492
Other languages
French (fr)
Japanese (ja)
Inventor
航平 大塚
亮太 箕輪
岩坂　博之
靖雄 林田
真吾 森
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 WO2020080019A1 publication Critical patent/WO2020080019A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/12—Ventilating; Cooling; Heating
    • 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
    • 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

Definitions

  • the present invention relates to an electromagnetic relay.
  • the electromagnetic relay includes a housing, a contact device, and an electromagnetic drive device that drives the contact device.
  • the contact device and the electromagnetic drive device are arranged inside the housing (see Patent Document 1).
  • the contact device and the electromagnetic drive device generate heat when voltage is applied to the electromagnetic drive device, that is, when electricity is applied.
  • the contact device and the electromagnetic drive device generate heat, the current-carrying capacity decreases, so it is necessary to efficiently release the heat of the contact device and the electromagnetic drive device.
  • An object of the present invention is to provide an electromagnetic relay capable of efficiently dissipating heat generated by a contact device or an electromagnetic relay when energized.
  • An electromagnetic relay includes a housing, a contact device, a magnet, a first yoke, and an electromagnetic drive device.
  • the housing includes a housing.
  • the contact device is arranged in the housing.
  • the magnet is arranged around the housing and generates a magnetic field inside the housing.
  • the first yoke is connected to the magnet and is arranged around the housing portion.
  • the electromagnetic drive device includes a second yoke, is disposed adjacent to the housing portion in the housing, and drives the contact device. At least one of the magnet, the first yoke, and the second yoke includes an exposed portion exposed from the housing.
  • At least one of the magnet, the first yoke, and the second yoke includes an exposed portion that is exposed from the housing, so that the heat generated by the contact device or the electromagnetic drive device is efficiently released from the exposed portion to the outside of the housing. be able to. Further, for example, it becomes possible to bring a cooling member such as a cooling pipe into contact with the exposed portion from the outside of the housing. In this case, the heat generated by the contact device or the electromagnetic drive device can be more efficiently released to the outside of the housing. You can
  • a contact case for partitioning the accommodating portion is further provided, and the first yoke includes an exposed portion and is supported by the contact case.
  • the first accommodating portion and the exposed portion can be formed with a simple structure.
  • the exposed portion includes a protruding portion protruding toward the outside of the housing.
  • the heat generated by the contact device or the electromagnetic relay can be more efficiently released to the outside of the housing.
  • the housing includes a mounting portion that is mounted in contact with another member, and the exposed portion is exposed from the mounting portion.
  • the exposed portion is exposed from the mounting portion, it is possible to efficiently dissipate heat generated by the contact device or the electromagnetic relay to another member such as a mounting plate to which the electromagnetic relay is mounted.
  • an electromagnetic relay capable of efficiently dissipating heat generated by a contact device or an electromagnetic relay when energized.
  • FIG. 1 is a cross-sectional view of the electromagnetic relay 100.
  • the electromagnetic relay 100 includes a housing 2, a contact device 3, a pair of magnets 4, a first yoke 5, a drive shaft 6, and an electromagnetic drive device 7.
  • the direction in which the axis Ax of the drive shaft 6 extends is referred to as the “axial direction”.
  • the upper side in FIG. 1 will be described as “upper”, the lower side as “lower”, the left side as “left”, and the right side as “right” in order to facilitate understanding of the description.
  • the lower side in FIG. 1 is the contact direction Z1.
  • the upper side in FIG. 1 is the opening direction Z2. Details of the contact direction Z1 and the opening direction Z2 will be described later.
  • the housing 2 includes a case 2a and a cover 2b.
  • the case 2a has a substantially rectangular box shape and is open at the top.
  • the case 2a includes an opening 2c having a side surface partially opened to the side (see FIG. 3). Details of the opening 2c will be described later.
  • the cover 2b covers the upper part of the case 2a.
  • the case 2a and the cover 2b are made of an insulating material.
  • a contact device 3, a drive shaft 6, and an electromagnetic drive device 7 are housed inside the housing 2.
  • the housing 2 includes a housing portion 2d in which the contact device 3 is arranged.
  • the housing portion 2d is partitioned by the contact case 11 arranged in the housing 2.
  • the upper part of the contact case 11 is covered with a contact cover 12.
  • the contact case 11 and the contact cover 12 are made of an insulating material.
  • FIG. 2 is a plan view of the contact case 11.
  • the contact case 11 includes a bottom portion 11a, a cylindrical portion 11b, a wall portion 11c, a yoke support portion 11d, a first contact support portion 11e, and a second contact support portion 11f. ,including.
  • the bottom part 11a is formed in a rectangular and plate shape.
  • the bottom portion 11a has a longitudinal direction that corresponds to the left-right direction in FIG.
  • the cylindrical portion 11b extends in a tubular shape in the axial direction.
  • the cylindrical portion 11b projects downward from the center of the bottom portion 11a, and projects upward from the center of the bottom portion 11a.
  • the cylindrical portion 11b is It includes a through hole 18 that axially penetrates the bottom portion 11a.
  • the through hole 18 penetrates the center of the bottom portion 11a in the axial direction.
  • the drive shaft 6 penetrates the through hole 18 in the axial direction.
  • the wall 11c extends upward from the bottom 11a in a plate shape.
  • the wall portion 11c has a substantially rectangular shape in plan view, and the housing portion 2d is partitioned by the wall portion 11c and the bottom portion 11a.
  • the yoke support portion 11d is arranged at a position adjacent to the wall portion 11c. Specifically, the yoke support portion 11d is arranged above the first contact point support portion 11e and the second contact point support portion 11f and outside the wall portion 11c.
  • the first contact point support portion 11e is arranged on the left side of the center of the bottom portion 11a in the longitudinal direction.
  • the first contact point support portion 11e is formed to project upward from the bottom portion 11a in a rectangular shape. Since the second contact point support portion 11f has a bilaterally symmetrical shape with the first contact point support portion 11e, the description thereof will be omitted.
  • the contact cover 12 covers the upper part of the contact case 11.
  • the contact cover 12 includes an arc extending wall 12a extending toward the bottom 11a.
  • the arc extension wall 12a is formed of, for example, a resin or a ceramic material such as aluminum oxide.
  • the contact device 3 includes a first fixed terminal 14, a second fixed terminal 15, a movable contact piece 16, and a contact piece holding portion 17.
  • the first fixed terminal 14, the second fixed terminal 15, and the movable contact piece 16 are formed of a material having conductivity.
  • the first fixed terminal 14 is formed by bending a plate-shaped member.
  • the first fixed terminal 14 is supported by the first contact support portion 11e of the contact case 11 inside the housing 2.
  • the first fixed terminal 14 includes a first fixed contact 14a and a first external connection portion 14b.
  • the 1st fixed contact 14a is arrange
  • the first external connection portion 14b projects in the left-right direction from the case 2a.
  • the second fixed terminal 15 is supported in the housing 2 by the second contact support portion 11f of the contact case 11.
  • the second fixed terminal 15 includes a second fixed contact 15a and a second external connection portion 15b. Since the second fixed terminal 15 has a bilaterally symmetrical shape with the first fixed terminal 14, the description thereof will be omitted.
  • the movable contact piece 16 includes a first movable contact 16a and a second movable contact 16b.
  • the 1st movable contact 16a is arrange
  • the 2nd movable contact 16b is arranged facing the 2nd fixed contact 15a, and can contact the 2nd fixed contact 15a.
  • the movable contact piece 16 is movable in a contact direction Z1 that contacts the first fixed contact 14a and the second fixed contact 15a and a separation direction Z2 that separates from the first fixed contact 14a and the second fixed contact 15a.
  • the contact direction Z1 is an example of the first direction
  • the opening direction Z2 is an example of the second direction.
  • the contact direction Z1 is the direction in which the first movable contact 16a and the second movable contact 16b contact the first fixed contact 14a and the second fixed contact 15a (downward in FIG. 1).
  • the separation direction Z2 is a direction (the upper side in FIG. 1) in which the first movable contact 16a and the second movable contact 16b are separated from the first fixed contact 14a and the second fixed contact 15a.
  • the contact direction Z1 and the opening direction Z2 coincide with the axial direction.
  • the contact piece holder 17 holds the movable contact piece 16 via the drive shaft 6, as shown in FIG.
  • the contact piece holder 17 connects the movable contact piece 16 and the drive shaft 6.
  • the contact piece holder 17 includes a holder 24 and a contact spring 25.
  • the movable contact piece 16 is sandwiched by the upper portion of the holder 24 and the collar portion 6 a of the drive shaft 6 in the axial direction.
  • the contact spring 25 is arranged between the bottom of the holder 24 and the collar 6a of the drive shaft 6, and biases the drive shaft 6 and the movable contact piece 16 toward the opening direction Z2.
  • FIG. 3 is a plan view when the cover 2b and the contact cover 12 are removed from the electromagnetic relay 100.
  • the pair of magnets 4 are arranged around the housing portion 2d.
  • the pair of magnets 4 are arranged around the wall portion 11c of the contact case 11 at positions facing each other in the left-right direction.
  • the pair of magnets 4 are arranged in a recess 11g formed in the wall 11c so as to be recessed in a direction toward the cylindrical portion 11b.
  • the recess 11g is formed at a position adjacent to the yoke support 11d, as shown in FIG.
  • the pair of magnets 4 are permanent magnets and generate a magnetic field inside the housing portion 2d.
  • the pair of magnets 4 are provided for extending an arc generated when the first movable contact 16a and the second movable contact 16b are separated from the first fixed contact 14a and the second fixed contact 15a in a predetermined direction. .
  • the first yoke 5 is a magnetic body, and as shown in FIGS. 1 and 3, is connected to the pair of magnets 4 and arranged around the housing portion 2d. In the present embodiment, the first yoke 5 is arranged around the wall portion 11c of the contact case 11.
  • FIG. 4 is a perspective view of the first yoke 5.
  • the first yoke 5 has a substantially U shape in a plan view and is formed by bending a plate-shaped member.
  • the first yoke 5 includes a base portion 5a, a pair of side portions 5b, and a foot portion 5c.
  • the base 5a extends in the left-right direction.
  • the pair of side portions 5b are arranged so as to face each other at both ends of the base portion 5a.
  • the pair of side portions 5b overlaps with the yoke support portion 11d of the contact case 11 in the axial direction, and the inner surface thereof is in contact with the pair of magnets 4.
  • the foot portion 5c is formed to extend in the contact direction Z1 at both ends of the pair of side portions 5b.
  • the foot portion 5c is in contact with and supported by the bottom portion 11a of the contact case 11 and the yoke support portion 11d outside the wall portion 11c of the contact case 11.
  • the first yoke 5 includes an exposed portion 8 that is at least partially exposed from the housing 2.
  • the exposed portion 8 in the present embodiment is constituted by the outer surface 5d of the base portion 5a of the first yoke 5. That is, the base portion 5 a of the first yoke 5 is configured such that the outer surface 5 d is exposed to the outside of the housing 2.
  • the exposed portion 8 is exposed from the opening 2c of the case 2a, as shown in FIG.
  • the opening 2c is formed by cutting out a side surface of the case 2a facing the outer surface 5d of the base 5a of the first yoke 5 into a substantially rectangular shape.
  • the drive shaft 6 extends along the contact direction Z1 and the separation direction Z2.
  • the drive shaft 6 is connected to the movable contact piece 16 via a contact piece holding portion 17.
  • the drive shaft 6 is movable in the contact direction Z1 and the opening direction Z2 together with the movable contact piece 16.
  • the electromagnetic drive device 7 drives the contact device 3. Specifically, the electromagnetic drive device 7 moves the movable contact piece 16 together with the drive shaft 6 in the contact direction Z1 and the opening direction Z2 by an electromagnetic force.
  • the electromagnetic drive device 7 is arranged in the housing 2 in a space different from that of the housing portion 2d. In the present embodiment, the electromagnetic drive device 7 is arranged below the contact case 11.
  • the electromagnetic drive device 7 includes a coil 32, a spool 33, a movable iron core 34, a fixed iron core 35, a biasing member 36, and a second yoke 37.
  • the coil 32 is attached to the outer circumference of the spool 33.
  • the spool 33 includes a housing portion 33a.
  • the accommodation portion 33 a is provided on the inner peripheral portion of the spool 33.
  • the accommodation portion 33a has a cylindrical shape and extends along the axial direction.
  • the housing portion 33a overlaps the through hole 18 of the cylindrical portion 11b of the contact case 11 in the axial direction.
  • a part of the drive shaft 6 is arranged in the housing portion 33a.
  • the movable iron core 34 is arranged inside the housing portion 33a.
  • the movable core 34 has a cylindrical shape, and the drive shaft 6 penetrates the center thereof in the axial direction, and is connected to the drive shaft 6 so as to be integrally movable.
  • the movable iron core 34 is movable in the axial direction together with the drive shaft 6.
  • the movable iron core 34 is guided to move in the axial direction by the annular iron core 38 arranged in the housing portion 33a.
  • the fixed iron core 35 is arranged in the accommodation portion 33a so as to face the movable iron core 34 on the contact direction Z1 side of the movable iron core 34.
  • the fixed iron core 35 is fixed to the second yoke 37.
  • the biasing member 36 is, for example, a coil spring, and is arranged between the movable iron core 34 and the fixed iron core 35.
  • the biasing member 36 biases the movable iron core 34 in the opening direction Z2. Therefore, the biasing member 36 is arranged between the movable iron core 34 and the fixed iron core 35 in a compressed state.
  • the second yoke 37 is a magnetic body and is arranged inside the housing 2 around the spool 33.
  • the second yoke 37 includes a yoke 37a and a yoke 37b.
  • the yoke 37 a has a plate shape and is arranged between the bottom portion 11 a of the contact case 11 and the spool 33.
  • the yoke 37a is fixed to the bottom portion 11a of the contact case 11 by a plurality of screw members (not shown).
  • the yoke 37a overlaps the lower part of the cylindrical portion 11b in the left-right direction.
  • the yoke 37a is connected to the annular iron core 38.
  • the yoke 37b has a substantially U shape, and the bottom portion is arranged below the spool 33 and is connected to the fixed iron core 35. The upper ends of both sides of the yoke 37b are connected to the yoke 37a.
  • FIG. 1 shows a state in which no voltage is applied to the coil 32.
  • the biasing member 36 stops the movement of the movable core 34 in the contact direction Z1. Therefore, the first movable contact 16a and the second movable contact 16b are in a state of being separated from the first fixed contact 14a and the second fixed contact 15a.
  • FIG. 5 shows a state in which a voltage is applied to the coil 32.
  • a voltage is applied to the coil 32 to excite it
  • the electromagnetic force of the coil 32 causes the movable iron core 34 to move in the contact direction Z1 against the elastic force of the urging member 36.
  • the drive shaft 6 and the movable contact piece 16 move in the contact direction Z1, and the first movable contact 16a and the second movable contact 16b become the first fixed contact 14a and the second fixed contact 15a.
  • the movable iron core 34 moves in the opening direction Z2 due to the elastic force of the biasing member 36, and the first movable contact 16a and the second movable contact 16b move to the first fixed contact 14a. And, it is in a state of being separated from the second fixed contact 15a.
  • the first movable contact 16a and the second movable contact 16b are in contact with the first fixed contact 14a and the second fixed contact 15a, that is, the contact device 3 when energized. It is possible to efficiently dissipate the heat generated by the outside of the housing 2 by the exposed portion 8. Specifically, the heat generated by the contact device 3 during energization is transmitted from the contact case 11 or the pair of magnets 4 to the first yoke 5. Then, the heat generated by the contact device 3 transmitted to the first yoke 5 can be released from the exposed portion 8 to the outside of the housing 2. Here, since the exposed portion 8 is exposed from the housing 2, the heat generated by the contact device 3 can be efficiently released. As a result, it is possible to suppress a decrease in current carrying capacity due to heat generation of the contact device 3.
  • a cooling member such as a cooling pipe can be arranged so as to contact the exposed portion 8 from the outside of the housing 2. In this case, the heat generated by the contact device 3 can be more efficiently released to the outside of the housing 2.
  • the configuration of the electromagnetic drive device 7 may be changed.
  • the shape or the arrangement of the housing 2, the contact case 11, the contact cover 12, the pair of magnets 4, the first yoke 5, and the second yoke 37 may be changed.
  • At least one of the first yoke 5 and the second yoke 37 preferably includes the exposed portion 8.
  • the shape of the opening 2c of the housing 2 may be changed according to the position and shape of the exposed portion 8.
  • the exposed portion 8 may be configured by appropriately combining the above-described embodiment and the modified examples described below.
  • FIG. 6 is a plan view of the electromagnetic relay 100 when the cover 2b and the contact cover 12 according to the first modification are removed.
  • the exposed portion 8 according to the first modified example includes a protruding portion 8 a protruding toward the outside of the housing 2.
  • Other configurations are the same as those in the above embodiment.
  • the protruding portion 8a is formed by bending a part of the first yoke 5, for example. In this case, since the surface area of the exposed portion 8 is large, the heat generated by the contact device 3 can be more efficiently released to the outside of the housing 2.
  • the shape of the protruding portion 8a may be any shape that increases the surface area of the exposed portion 8.
  • the protruding portion 8a may be formed by protruding a part of the yoke 37a of the second yoke 37 toward the outside of the housing 2. In this case, the heat generated by the electromagnetic drive device 7 can be efficiently released to the outside of the housing 2.
  • FIG. 8 is a plan view of the electromagnetic relay 100 according to the second modification as seen from the contact direction Z1.
  • FIG. 9 is a side view when the electromagnetic relay 100 according to the second modification is attached to another member 40.
  • the other member 40 is, for example, a mounting plate of an electric machine using the electromagnetic relay 100.
  • the housing 2 includes a fixed portion 2e and a mounting portion 2f.
  • the fixing portion 2e is fixed to the other member 40 by a screw member (not shown).
  • the mounting portion 2f is mounted in contact with another member 40.
  • the mounting portion 2f here is the surface of the cover 2b of the housing 2 on the side in the opening direction Z2.
  • the exposed portion 8 is exposed from the mounting portion 2f.
  • the opening 2c having a shape corresponding to the shape of the first yoke 5 is formed in the cover 2b, and the surface of the first yoke 5 on the opening direction Z2 side is exposed from the mounting portion 2f. is doing.
  • the heat generation of the contact device 3 can be efficiently released to the other member 40 via the first yoke 5. Further, by configuring the exposed portion 8 to be in contact with the other member 40, the design of the cooling pipe when the exposed portion 8 is cooled by providing a cooling pipe, for example, becomes easy. Further, compared to the case where the exposed portion 8 is provided with the protruding portion 8a, there is less possibility of interfering with other members.
  • the other member 40 is preferably formed of a material having an insulating property. Further, depending on the current carrying capacity, it is necessary to appropriately adjust the material, size, etc. of the other member 40. Further, as shown in FIG. 7, the pair of magnets 4 may be exposed from the mounting portion 2f to form the exposed portion 8. Further, as shown in FIGS. 10 and 11, the shape of the first yoke 5 can be appropriately changed according to the configuration of the contact device 3. That is, the shape of the exposed portion 8 can be appropriately changed according to the configuration of the contact device 3.
  • the second yoke 37 is exposed from the mounting portion 2f and the second yoke 37 is brought into contact with another member 40. You may arrange it.
  • an electromagnetic relay capable of efficiently dissipating heat generated by a contact device or an electromagnetic relay when energized.
  • Electromagnetic drive device 8 Exposed part 8a Projection part 11 Contact case 37 2nd yoke 100 Electromagnetic relay

Abstract

This electromagnetic relay is provided with a housing, a contact device, a magnet, a first yoke, and an electromagnetic drive device. The housing includes an accommodation part. The contact device is disposed in the accommodation part. The magnet is disposed around the accommodation part, and causes a magnetic field to be generated inside the accommodation part. The first yoke is connected to the magnet, and disposed around the accommodation part. The electromagnetic drive device includes a second yoke, is disposed adjacent to the accommodation part in the housing, and drives the contact device. At least one of the magnet, the first yoke, and the second yoke includes an exposed part that is exposed from the housing.

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.
　従来、電気回路を開閉する電磁継電器が知られている。電磁継電器は、ハウジングと、接点装置と、接点装置を駆動する電磁駆動装置と、を備えている。接点装置及び電磁駆動装置は、ハウジングの内部に配置されている（特許文献１参照）。 Conventionally, an electromagnetic relay that opens and closes an electric circuit is known. The electromagnetic relay includes a housing, a contact device, and an electromagnetic drive device that drives the contact device. The contact device and the electromagnetic drive device are arranged inside the housing (see Patent Document 1).
特許第５９３８７４５号公報Patent No. 5938745
　電磁駆動装置に電圧が印加された状態、すなわち、通電時には、接点装置及び電磁駆動装置が発熱する。接点装置及び電磁駆動装置が発熱すると通電容量が低下するため、接点装置及び電磁駆動装置の発熱を効率的に逃がす必要がある。 The contact device and the electromagnetic drive device generate heat when voltage is applied to the electromagnetic drive device, that is, when electricity is applied. When the contact device and the electromagnetic drive device generate heat, the current-carrying capacity decreases, so it is necessary to efficiently release the heat of the contact device and the electromagnetic drive device.
　本発明の課題は、通電時における接点装置又は電磁継電器の発熱を効率的に逃がすことができる電磁継電器を提供することにある。 An object of the present invention is to provide an electromagnetic relay capable of efficiently dissipating heat generated by a contact device or an electromagnetic relay when energized.
　（１）本発明の一態様に係る電磁継電器は、ハウジングと、接点装置と、磁石と、第１ヨークと、電磁駆動装置と、を備えている。ハウジングは、収容部を含む。接点装置は、収容部に配置されている。磁石は、収容部の周囲に配置され、収容部の内部に磁界を発生させる。第１ヨークは、磁石に接続され、収容部の周囲に配置されている。電磁駆動装置は、第２ヨークを含み、ハウジングにおいて収容部に隣接して配置され、接点装置を駆動する。磁石、第１ヨーク、及び第２ヨークの少なくともいずれかは、ハウジングから露出する露出部を含む。 (1) An electromagnetic relay according to an aspect of the present invention includes a housing, a contact device, a magnet, a first yoke, and an electromagnetic drive device. The housing includes a housing. The contact device is arranged in the housing. The magnet is arranged around the housing and generates a magnetic field inside the housing. The first yoke is connected to the magnet and is arranged around the housing portion. The electromagnetic drive device includes a second yoke, is disposed adjacent to the housing portion in the housing, and drives the contact device. At least one of the magnet, the first yoke, and the second yoke includes an exposed portion exposed from the housing.
　この電磁継電器では、磁石、第１ヨーク、及び第２ヨークの少なくともいずれかがハウジングから露出する露出部を含むため、露出部から接点装置又は電磁駆動装置の発熱をハウジングの外部に効率的に逃がすことができる。また、例えば、ハウジングの外部から冷却管等の冷却部材を露出部に接触させることも可能になるので、この場合は、接点装置又は電磁駆動装置の発熱をハウジングの外部にさらに効率的に逃がすことができる。 In this electromagnetic relay, at least one of the magnet, the first yoke, and the second yoke includes an exposed portion that is exposed from the housing, so that the heat generated by the contact device or the electromagnetic drive device is efficiently released from the exposed portion to the outside of the housing. be able to. Further, for example, it becomes possible to bring a cooling member such as a cooling pipe into contact with the exposed portion from the outside of the housing. In this case, the heat generated by the contact device or the electromagnetic drive device can be more efficiently released to the outside of the housing. You can
　（２）好ましくは、収容部を区画する接点ケースをさらに備え、第１ヨークは、露出部を含み、接点ケースに支持されている。この場合は、第１収容部及び露出部を簡単な構成で形成することができる。 (2) Preferably, a contact case for partitioning the accommodating portion is further provided, and the first yoke includes an exposed portion and is supported by the contact case. In this case, the first accommodating portion and the exposed portion can be formed with a simple structure.
　（３）好ましくは、露出部は、ハウジングの外部に向かって突出する突出部を含む。この場合は、ハウジングの外部に向かって露出部を突出させることで露出部の表面積が大きくなるので、接点装置又は電磁継電器の発熱をハウジングの外部にさらに効率的に逃がすことができる。 (3) Preferably, the exposed portion includes a protruding portion protruding toward the outside of the housing. In this case, since the surface area of the exposed portion is increased by projecting the exposed portion toward the outside of the housing, the heat generated by the contact device or the electromagnetic relay can be more efficiently released to the outside of the housing.
　（４）好ましくは、ハウジングは、他の部材に接触して装着される装着部を含み、露出部は、装着部から露出している。この場合は、露出部が装着部から露出しているので、例えば、電磁継電器が取り付けられる取付板などの他の部材に接点装置又は電磁継電器の発熱を効率的に逃がすことができる。 (4) Preferably, the housing includes a mounting portion that is mounted in contact with another member, and the exposed portion is exposed from the mounting portion. In this case, since the exposed portion is exposed from the mounting portion, it is possible to efficiently dissipate heat generated by the contact device or the electromagnetic relay to another member such as a mounting plate to which the electromagnetic relay is mounted.
　本発明によれば、通電時における接点装置又は電磁継電器の発熱を効率的に逃がすことができる電磁継電器を提供することができる。 According to the present invention, it is possible to provide an electromagnetic relay capable of efficiently dissipating heat generated by a contact device or an electromagnetic relay when energized.
本発明の一実施形態に係る電磁継電器の断面図である。It is sectional drawing of the electromagnetic relay which concerns on one Embodiment of this invention. 接点ケースの平面図である。It is a top view of a contact case. 電磁継電器からカバー及び接点カバーを取り除いたときの平面図である。It is a top view when a cover and a contact cover are removed from an electromagnetic relay. 第１ヨークの斜視図である。It is a perspective view of a 1st yoke. コイルに電圧を印加したときの電磁継電器の断面図である。It is sectional drawing of an electromagnetic relay when voltage is applied to a coil. 変形例に係るカバー及び接点カバーを取り除いたときの電磁継電器の平面図である。It is a top view of an electromagnetic relay when a cover and a contact cover concerning a modification are removed. 変形例に係る電磁継電器の断面図である。It is sectional drawing of the electromagnetic relay which concerns on a modification. 変形例に係る電磁継電器を接触方向から見た平面図である。It is the top view which looked at the electromagnetic relay which concerns on a modification from the contact direction. 変形例に係る電磁継電器を他の部材に装着したときの側面図である。It is a side view when the electromagnetic relay which concerns on a modification is attached to another member. 変形例に係る電磁継電器を他の部材に装着したときの側面図である。It is a side view when the electromagnetic relay which concerns on a modification is attached to another member. 変形例に係る電磁継電器を他の部材に装着したときの側面図である。It is a side view when the electromagnetic relay which concerns on a modification is attached to another member.
　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１は電磁継電器１００の断面図である。図１に示すように、電磁継電器１００は、ハウジング２と、接点装置３と、１対の磁石４と、第１ヨーク５と、駆動軸６と、電磁駆動装置７と、を備えている。なお、以下の説明において、駆動軸６の軸線Ａｘが延びる方向を「軸方向」という。また、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における上側を「上」、下側を「下」、左側を「左」、右側を「右」として説明する。なお、本実施形態では、図１における下方は、接触方向Ｚ１である。また、図１における上方は、開離方向Ｚ２である。接触方向Ｚ１及び開離方向Ｚ２の詳細については後述する。 Hereinafter, an embodiment of an electromagnetic relay according to one aspect of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of the electromagnetic relay 100. As shown in FIG. 1, the electromagnetic relay 100 includes a housing 2, a contact device 3, a pair of magnets 4, a first yoke 5, a drive shaft 6, and an electromagnetic drive device 7. In the following description, the direction in which the axis Ax of the drive shaft 6 extends is referred to as the “axial direction”. Further, when referring to the drawings, the upper side in FIG. 1 will be described as “upper”, the lower side as “lower”, the left side as “left”, and the right side as “right” in order to facilitate understanding of the description. In the present embodiment, the lower side in FIG. 1 is the contact direction Z1. The upper side in FIG. 1 is the opening direction Z2. Details of the contact direction Z1 and the opening direction Z2 will be described later.
　ハウジング２は、ケース２ａと、カバー２ｂと、を含む。ケース２ａは、略四角形の箱型であり、上方が開放されている。ケース２ａは、側面の一部が側方に開口した開口部２ｃを含む（図３参照）。開口部２ｃの詳細については後述する。 The housing 2 includes a case 2a and a cover 2b. The case 2a has a substantially rectangular box shape and is open at the top. The case 2a includes an opening 2c having a side surface partially opened to the side (see FIG. 3). Details of the opening 2c will be described later.
　カバー２ｂは、ケース２ａの上方を覆う。ケース２ａ及びカバー２ｂは、絶縁性を有する材料で形成されている。ハウジング２の内部には、接点装置３、駆動軸６、及び電磁駆動装置７が収容されている。 The cover 2b covers the upper part of the case 2a. The case 2a and the cover 2b are made of an insulating material. A contact device 3, a drive shaft 6, and an electromagnetic drive device 7 are housed inside the housing 2.
　ハウジング２は、接点装置３が配置される収容部２ｄを含む。収容部２ｄは、本実施形態では、ハウジング２内に配置された接点ケース１１によって区画されている。接点ケース１１の上方は、接点カバー１２によって覆われている。接点ケース１１及び接点カバー１２は、絶縁性を有する材料で形成されている。 The housing 2 includes a housing portion 2d in which the contact device 3 is arranged. In the present embodiment, the housing portion 2d is partitioned by the contact case 11 arranged in the housing 2. The upper part of the contact case 11 is covered with a contact cover 12. The contact case 11 and the contact cover 12 are made of an insulating material.
　図２は、接点ケース１１の平面図である。図１及び図２に示すように、接点ケース１１は、底部１１ａと、円筒部１１ｂと、壁部１１ｃと、ヨーク支持部１１ｄと、第１接点支持部１１ｅと、第２接点支持部１１ｆと、を含む。底部１１ａは、矩形かつ板状に形成されている。底部１１ａは、長手方向が図１における左右方向と一致する。 FIG. 2 is a plan view of the contact case 11. As shown in FIGS. 1 and 2, the contact case 11 includes a bottom portion 11a, a cylindrical portion 11b, a wall portion 11c, a yoke support portion 11d, a first contact support portion 11e, and a second contact support portion 11f. ,including. The bottom part 11a is formed in a rectangular and plate shape. The bottom portion 11a has a longitudinal direction that corresponds to the left-right direction in FIG.
　円筒部１１ｂは、軸方向に筒状に延びている。円筒部１１ｂは、底部１１ａの中心から
下方に突出するとともに、底部１１ａの中心から上方に突出している。円筒部１１ｂは、
底部１１ａを軸方向に貫通する貫通孔１８を含む。貫通孔１８は、底部１１ａの中心を軸
方向に貫通している。貫通孔１８は、駆動軸６が軸方向に貫通する。 The cylindrical portion 11b extends in a tubular shape in the axial direction. The cylindrical portion 11b projects downward from the center of the bottom portion 11a, and projects upward from the center of the bottom portion 11a. The cylindrical portion 11b is
It includes a through hole 18 that axially penetrates the bottom portion 11a. The through hole 18 penetrates the center of the bottom portion 11a in the axial direction. The drive shaft 6 penetrates the through hole 18 in the axial direction.
　壁部１１ｃは、底部１１ａから板状に上方に延びている。壁部１１ｃは、平面視において略矩形状であり、壁部１１ｃ及び底部１１ａによって収容部２ｄが区画されている。 The wall 11c extends upward from the bottom 11a in a plate shape. The wall portion 11c has a substantially rectangular shape in plan view, and the housing portion 2d is partitioned by the wall portion 11c and the bottom portion 11a.
　ヨーク支持部１１ｄは、壁部１１ｃに隣接した位置に配置されている。詳細には、ヨーク支持部１１ｄは、第１接点支持部１１ｅ及び第２接点支持部１１ｆの上方かつ壁部１１ｃの外側に配置されている。 The yoke support portion 11d is arranged at a position adjacent to the wall portion 11c. Specifically, the yoke support portion 11d is arranged above the first contact point support portion 11e and the second contact point support portion 11f and outside the wall portion 11c.
　第１接点支持部１１ｅは、長手方向における底部１１ａの中心よりも左側に配置されている。第１接点支持部１１ｅは、底部１１ａから矩形状に上方に突出して形成されている。第２接点支持部１１ｆは、第１接点支持部１１ｅと左右対称形状であるため、説明を省略する。 The first contact point support portion 11e is arranged on the left side of the center of the bottom portion 11a in the longitudinal direction. The first contact point support portion 11e is formed to project upward from the bottom portion 11a in a rectangular shape. Since the second contact point support portion 11f has a bilaterally symmetrical shape with the first contact point support portion 11e, the description thereof will be omitted.
　接点カバー１２は、接点ケース１１の上方を覆う。接点カバー１２は、底部１１ａに向かって延びるアーク伸長壁１２ａを含む。アーク伸長壁１２ａは、例えば、樹脂、又は酸化アルミニウム等のセラミック材料などで形成されている。 The contact cover 12 covers the upper part of the contact case 11. The contact cover 12 includes an arc extending wall 12a extending toward the bottom 11a. The arc extension wall 12a is formed of, for example, a resin or a ceramic material such as aluminum oxide.
　接点装置３は、第１固定端子１４と、第２固定端子１５と、可動接触片１６と、接触片保持部１７と、を含む。第１固定端子１４、第２固定端子１５、及び可動接触片１６は、導電性を有する材料で形成されている。 The contact device 3 includes a first fixed terminal 14, a second fixed terminal 15, a movable contact piece 16, and a contact piece holding portion 17. The first fixed terminal 14, the second fixed terminal 15, and the movable contact piece 16 are formed of a material having conductivity.
　第１固定端子１４は、板状の部材を折り曲げて形成されている。　第１固定端子１４は、ハウジング２内において、接点ケース１１の第１接点支持部１１ｅに支持されている。第１固定端子１４は、第１固定接点１４ａと、第１外部接続部１４ｂと、を含む。第１固定接点１４ａは、収容部２ｄ内で、第１接点支持部１１ｅの上部に配置されている。第１外部接続部１４ｂは、ケース２ａから左右方向に突出している。 The first fixed terminal 14 is formed by bending a plate-shaped member. The first fixed terminal 14 is supported by the first contact support portion 11e of the contact case 11 inside the housing 2. The first fixed terminal 14 includes a first fixed contact 14a and a first external connection portion 14b. The 1st fixed contact 14a is arrange | positioned in the accommodating part 2d above the 1st contact support part 11e. The first external connection portion 14b projects in the left-right direction from the case 2a.
　第２固定端子１５は、ハウジング２内において、接点ケース１１の第２接点支持部１１ｆに支持されている。第２固定端子１５は、第２固定接点１５ａと、第２外部接続部１５ｂと、を含む。第２固定端子１５は、第１固定端子１４と左右対称形状であるため、説明を省略する。 The second fixed terminal 15 is supported in the housing 2 by the second contact support portion 11f of the contact case 11. The second fixed terminal 15 includes a second fixed contact 15a and a second external connection portion 15b. Since the second fixed terminal 15 has a bilaterally symmetrical shape with the first fixed terminal 14, the description thereof will be omitted.
　可動接触片１６は、第１可動接点１６ａと、第２可動接点１６ｂと、を含む。第１可動接点１６ａは、第１固定接点１４ａに対向して配置され、第１固定接点１４ａに接触可能である。第２可動接点１６ｂは、第２固定接点１５ａに対向して配置され、第２固定接点１５ａに接触可能である。 The movable contact piece 16 includes a first movable contact 16a and a second movable contact 16b. The 1st movable contact 16a is arrange | positioned facing the 1st fixed contact 14a, and can contact the 1st fixed contact 14a. The 2nd movable contact 16b is arranged facing the 2nd fixed contact 15a, and can contact the 2nd fixed contact 15a.
　可動接触片１６は、第１固定接点１４ａ及び第２固定接点１５ａに接触する接触方向Ｚ１及び第１固定接点１４ａ及び第２固定接点１５ａから開離する開離方向Ｚ２に移動可能である。接触方向Ｚ１は、第１方向の一例であり、開離方向Ｚ２は、第２方向の一例である。 The movable contact piece 16 is movable in a contact direction Z1 that contacts the first fixed contact 14a and the second fixed contact 15a and a separation direction Z2 that separates from the first fixed contact 14a and the second fixed contact 15a. The contact direction Z1 is an example of the first direction, and the opening direction Z2 is an example of the second direction.
　接触方向Ｚ１は、第１可動接点１６ａ及び第２可動接点１６ｂが第１固定接点１４ａ及び第２固定接点１５ａに対して接触する方向（図１における下方）である。開離方向Ｚ２は、第１可動接点１６ａ及び第２可動接点１６ｂが第１固定接点１４ａ及び第２固定接点１５ａから開離する方向（図１における上方）である。接触方向Ｚ１及び開離方向Ｚ２は、軸方向と一致する。 The contact direction Z1 is the direction in which the first movable contact 16a and the second movable contact 16b contact the first fixed contact 14a and the second fixed contact 15a (downward in FIG. 1). The separation direction Z2 is a direction (the upper side in FIG. 1) in which the first movable contact 16a and the second movable contact 16b are separated from the first fixed contact 14a and the second fixed contact 15a. The contact direction Z1 and the opening direction Z2 coincide with the axial direction.
　接触片保持部１７は、図１に示すように、駆動軸６を介して可動接触片１６を保持する。接触片保持部１７は、可動接触片１６と駆動軸６とを連結する。接触片保持部１７は、ホルダ２４と、接点バネ２５と、を含む。可動接触片１６は、軸方向において、ホルダ２４の上部と駆動軸６の鍔部６ａとによって挟持されている。接点バネ２５は、ホルダ２４の底部と駆動軸６の鍔部６ａとの間に配置され、駆動軸６及び可動接触片１６を開離方向Ｚ２側に向けて付勢する。 The contact piece holder 17 holds the movable contact piece 16 via the drive shaft 6, as shown in FIG. The contact piece holder 17 connects the movable contact piece 16 and the drive shaft 6. The contact piece holder 17 includes a holder 24 and a contact spring 25. The movable contact piece 16 is sandwiched by the upper portion of the holder 24 and the collar portion 6 a of the drive shaft 6 in the axial direction. The contact spring 25 is arranged between the bottom of the holder 24 and the collar 6a of the drive shaft 6, and biases the drive shaft 6 and the movable contact piece 16 toward the opening direction Z2.
　図３は、電磁継電器１００からカバー２ｂ及び接点カバー１２を取り除いたときの平面図である。１対の磁石４は、図３に示すように、収容部２ｄの周囲に配置されている。本実施形態では、１対の磁石４は、接点ケース１１の壁部１１ｃの周囲において、互いに左右方向に対向する位置に配置されている。詳細には、１対の磁石４は、壁部１１ｃにおいて円筒部１１ｂに近づく方向に凹んで形成された凹部１１ｇに配置されている。凹部１１ｇは、図２にように、ヨーク支持部１１ｄに隣接する位置に形成されている。１対の磁石４は、永久磁石であり、収容部２ｄの内部に磁界を発生させる。１対の磁石４は、第１可動接点１６ａ及び第２可動接点１６ｂが第１固定接点１４ａ及び第２固定接点１５ａから開離するときに発生するアークを所定方向に引き伸ばすために設けられている。 FIG. 3 is a plan view when the cover 2b and the contact cover 12 are removed from the electromagnetic relay 100. As shown in FIG. 3, the pair of magnets 4 are arranged around the housing portion 2d. In the present embodiment, the pair of magnets 4 are arranged around the wall portion 11c of the contact case 11 at positions facing each other in the left-right direction. Specifically, the pair of magnets 4 are arranged in a recess 11g formed in the wall 11c so as to be recessed in a direction toward the cylindrical portion 11b. The recess 11g is formed at a position adjacent to the yoke support 11d, as shown in FIG. The pair of magnets 4 are permanent magnets and generate a magnetic field inside the housing portion 2d. The pair of magnets 4 are provided for extending an arc generated when the first movable contact 16a and the second movable contact 16b are separated from the first fixed contact 14a and the second fixed contact 15a in a predetermined direction. .
　第１ヨーク５は、磁性体であり、図１及び図３に示すように、１対の磁石４に接続され、収容部２ｄの周囲に配置されている。本実施形態では、第１ヨーク５は、接点ケース１１の壁部１１ｃの周囲に配置されている。 The first yoke 5 is a magnetic body, and as shown in FIGS. 1 and 3, is connected to the pair of magnets 4 and arranged around the housing portion 2d. In the present embodiment, the first yoke 5 is arranged around the wall portion 11c of the contact case 11.
　図４は、第１ヨーク５の斜視図である。第１ヨーク５は、平面視において略Ｕ字形状であり、板状の部材を折り曲げて形成されている。第１ヨーク５は、基部５ａと、１対の側部５ｂと、足部５ｃと、を含む。基部５ａは、左右方向に延びている。１対の側部５ｂは、基部５ａの両端において互いに対向するように配置されている。１対の側部５ｂは、軸方向において接点ケース１１のヨーク支持部１１ｄと重なり、内側面が１対の磁石４に接触している。足部５ｃは、１対の側部５ｂのそれぞれの両端において接触方向Ｚ１に延びて形成されている。足部５ｃは、接点ケース１１の壁部１１ｃの外側で接点ケース１１の底部１１ａ及びヨーク支持部１１ｄに接触して支持されている。 FIG. 4 is a perspective view of the first yoke 5. The first yoke 5 has a substantially U shape in a plan view and is formed by bending a plate-shaped member. The first yoke 5 includes a base portion 5a, a pair of side portions 5b, and a foot portion 5c. The base 5a extends in the left-right direction. The pair of side portions 5b are arranged so as to face each other at both ends of the base portion 5a. The pair of side portions 5b overlaps with the yoke support portion 11d of the contact case 11 in the axial direction, and the inner surface thereof is in contact with the pair of magnets 4. The foot portion 5c is formed to extend in the contact direction Z1 at both ends of the pair of side portions 5b. The foot portion 5c is in contact with and supported by the bottom portion 11a of the contact case 11 and the yoke support portion 11d outside the wall portion 11c of the contact case 11.
　第１ヨーク５は、少なくとも一部がハウジング２から露出する露出部８を含む。本実施形態における露出部８は、第１ヨーク５の基部５ａの外側面５ｄによって構成されている。すなわち、第１ヨーク５の基部５ａは、外側面５ｄがハウジング２の外部に露出するように構成されている。具体的には、露出部８は、図３に示すように、ケース２ａの開口部２ｃから露出している。開口部２ｃは、第１ヨーク５の基部５ａの外側面５ｄに対向するケース２ａの側面を略矩形状に切り欠いて形成されている。 The first yoke 5 includes an exposed portion 8 that is at least partially exposed from the housing 2. The exposed portion 8 in the present embodiment is constituted by the outer surface 5d of the base portion 5a of the first yoke 5. That is, the base portion 5 a of the first yoke 5 is configured such that the outer surface 5 d is exposed to the outside of the housing 2. Specifically, the exposed portion 8 is exposed from the opening 2c of the case 2a, as shown in FIG. The opening 2c is formed by cutting out a side surface of the case 2a facing the outer surface 5d of the base 5a of the first yoke 5 into a substantially rectangular shape.
　駆動軸６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６は、接触片保持部１７を介して可動接触片１６に連結されている。駆動軸６は、可動接触片１６とともに接触方向Ｚ１及び開離方向Ｚ２に移動可能である。 The drive shaft 6 extends along the contact direction Z1 and the separation direction Z2. The drive shaft 6 is connected to the movable contact piece 16 via a contact piece holding portion 17. The drive shaft 6 is movable in the contact direction Z1 and the opening direction Z2 together with the movable contact piece 16.
　電磁駆動装置７は、接点装置３を駆動する。詳細には、電磁駆動装置７は、電磁力によって駆動軸６とともに可動接触片１６を接触方向Ｚ１及び開離方向Ｚ２に移動させる。電磁駆動装置７は、ハウジング２内において、収容部２ｄとは異なる空間に配置されている。本実施形態では、電磁駆動装置７は、接点ケース１１の下方に配置されている。 The electromagnetic drive device 7 drives the contact device 3. Specifically, the electromagnetic drive device 7 moves the movable contact piece 16 together with the drive shaft 6 in the contact direction Z1 and the opening direction Z2 by an electromagnetic force. The electromagnetic drive device 7 is arranged in the housing 2 in a space different from that of the housing portion 2d. In the present embodiment, the electromagnetic drive device 7 is arranged below the contact case 11.
　電磁駆動装置７は、コイル３２と、スプール３３と、可動鉄心３４と、固定鉄心３５と、付勢部材３６と、第２ヨーク３７と、含む。 The electromagnetic drive device 7 includes a coil 32, a spool 33, a movable iron core 34, a fixed iron core 35, a biasing member 36, and a second yoke 37.
　コイル３２は、スプール３３の外周に装着されている。スプール３３は、収容部３３ａを含む。収容部３３ａは、スプール３３の内周部に設けられる。収容部３３ａは、円筒状であり、軸方向に沿って延びている。収容部３３ａは、軸方向において、接点ケース１１の円筒部１１ｂの貫通孔１８と重なる。収容部３３ａ内には、駆動軸６の一部が配置されている。 The coil 32 is attached to the outer circumference of the spool 33. The spool 33 includes a housing portion 33a. The accommodation portion 33 a is provided on the inner peripheral portion of the spool 33. The accommodation portion 33a has a cylindrical shape and extends along the axial direction. The housing portion 33a overlaps the through hole 18 of the cylindrical portion 11b of the contact case 11 in the axial direction. A part of the drive shaft 6 is arranged in the housing portion 33a.
　可動鉄心３４は、収容部３３ａ内に配置されている。可動鉄心３４は、円柱状であり、中心を駆動軸６が軸方向に貫通して、駆動軸６に一体移動可能に連結されている。可動鉄心３４は、駆動軸６とともに軸方向に移動可能である。本実施形態では、可動鉄心３４は、収容部３３ａ内に配置された環状鉄心３８によって軸方向の移動が案内される。 The movable iron core 34 is arranged inside the housing portion 33a. The movable core 34 has a cylindrical shape, and the drive shaft 6 penetrates the center thereof in the axial direction, and is connected to the drive shaft 6 so as to be integrally movable. The movable iron core 34 is movable in the axial direction together with the drive shaft 6. In the present embodiment, the movable iron core 34 is guided to move in the axial direction by the annular iron core 38 arranged in the housing portion 33a.
　固定鉄心３５は、収容部３３ａ内において可動鉄心３４よりも接触方向Ｚ１側で可動鉄心３４に対向して配置されている。固定鉄心３５は、第２ヨーク３７に固定されている。 The fixed iron core 35 is arranged in the accommodation portion 33a so as to face the movable iron core 34 on the contact direction Z1 side of the movable iron core 34. The fixed iron core 35 is fixed to the second yoke 37.
　付勢部材３６は、例えばコイルばねであり、可動鉄心３４と固定鉄心３５との間に配置される。付勢部材３６は、可動鉄心３４を開離方向Ｚ２に向けて付勢する。したがって、付勢部材３６は、圧縮された状態で、可動鉄心３４と固定鉄心３５との間に配置されている。 The biasing member 36 is, for example, a coil spring, and is arranged between the movable iron core 34 and the fixed iron core 35. The biasing member 36 biases the movable iron core 34 in the opening direction Z2. Therefore, the biasing member 36 is arranged between the movable iron core 34 and the fixed iron core 35 in a compressed state.
　第２ヨーク３７は、磁性体であり、ハウジング２内でスプール３３の周囲に配置されている。第２ヨーク３７は、ヨーク３７ａと、ヨーク３７ｂと、を含む。ヨーク３７ａは、板状であり、接点ケース１１の底部１１ａとスプール３３との間に配置されている。ヨーク３７ａは、図示しない複数のねじ部材によって、接点ケース１１の底部１１ａに固定されている。ヨーク３７ａは、左右方向において円筒部１１ｂの下部と重なる。ヨーク３７ａは、環状鉄心３８に接続されている。ヨーク３７ｂは、略Ｕ字形状であり、底部がスプール３３の下方に配置され、固定鉄心３５に接続されている。ヨーク３７ｂは、両側部の上端がヨーク３７ａに接続されている。 The second yoke 37 is a magnetic body and is arranged inside the housing 2 around the spool 33. The second yoke 37 includes a yoke 37a and a yoke 37b. The yoke 37 a has a plate shape and is arranged between the bottom portion 11 a of the contact case 11 and the spool 33. The yoke 37a is fixed to the bottom portion 11a of the contact case 11 by a plurality of screw members (not shown). The yoke 37a overlaps the lower part of the cylindrical portion 11b in the left-right direction. The yoke 37a is connected to the annular iron core 38. The yoke 37b has a substantially U shape, and the bottom portion is arranged below the spool 33 and is connected to the fixed iron core 35. The upper ends of both sides of the yoke 37b are connected to the yoke 37a.
　次に、電磁継電器１００の動作について説明する。図１は、コイル３２に電圧が印加されていない状態を示している。コイル３２に電圧が印加されていない場合は、付勢部材３６によって可動鉄心３４の接触方向Ｚ１への移動が押し止められている。このため、第１可動接点１６ａ及び第２可動接点１６ｂは、第１固定接点１４ａ及び第２固定接点１５ａから開離した状態となっている。 Next, the operation of the electromagnetic relay 100 will be described. FIG. 1 shows a state in which no voltage is applied to the coil 32. When no voltage is applied to the coil 32, the biasing member 36 stops the movement of the movable core 34 in the contact direction Z1. Therefore, the first movable contact 16a and the second movable contact 16b are in a state of being separated from the first fixed contact 14a and the second fixed contact 15a.
　図５は、コイル３２に電圧が印加された状態を示している。コイル３２に電圧を印加して励磁すると、コイル３２の電磁力により、可動鉄心３４が、付勢部材３６の弾性力に抗して、接触方向Ｚ１に移動する。可動鉄心３４の移動に伴い、駆動軸６及び可動接触片１６が接触方向Ｚ１に移動して、第１可動接点１６ａ及び第２可動接点１６ｂが、第１固定接点１４ａ及び第２固定接点１５ａに接触する。 FIG. 5 shows a state in which a voltage is applied to the coil 32. When a voltage is applied to the coil 32 to excite it, the electromagnetic force of the coil 32 causes the movable iron core 34 to move in the contact direction Z1 against the elastic force of the urging member 36. With the movement of the movable iron core 34, the drive shaft 6 and the movable contact piece 16 move in the contact direction Z1, and the first movable contact 16a and the second movable contact 16b become the first fixed contact 14a and the second fixed contact 15a. Contact.
　コイル３２への電圧の印加を停止すると、付勢部材３６の弾性力によって可動鉄心３４が開離方向Ｚ２へ移動して、第１可動接点１６ａ及び第２可動接点１６ｂが、第１固定接点１４ａ及び第２固定接点１５ａから開離した状態となる。 When the application of the voltage to the coil 32 is stopped, the movable iron core 34 moves in the opening direction Z2 due to the elastic force of the biasing member 36, and the first movable contact 16a and the second movable contact 16b move to the first fixed contact 14a. And, it is in a state of being separated from the second fixed contact 15a.
　ここで、本実施形態に係る電磁継電器１００では、第１可動接点１６ａ及び第２可動接点１６ｂが、第１固定接点１４ａ及び第２固定接点１５ａに接触した状態、すなわち、通電時における接点装置３の発熱を、露出部８によってハウジング２の外部に効率的に逃がすことができる。具体的には、通電時における接点装置３の発熱は、接点ケース１１又は１対の磁石４から第１ヨーク５に伝達される。そして、第１ヨーク５に伝達された接点装置３の発熱は、露出部８からハウジング２の外部に逃がすことができる。ここでは、露出部８がハウジング２から露出しているので、接点装置３の発熱を効率的に逃がすことができる。これにより、接点装置３の発熱による通電容量の低下を抑制することができる。 Here, in the electromagnetic relay 100 according to the present embodiment, the first movable contact 16a and the second movable contact 16b are in contact with the first fixed contact 14a and the second fixed contact 15a, that is, the contact device 3 when energized. It is possible to efficiently dissipate the heat generated by the outside of the housing 2 by the exposed portion 8. Specifically, the heat generated by the contact device 3 during energization is transmitted from the contact case 11 or the pair of magnets 4 to the first yoke 5. Then, the heat generated by the contact device 3 transmitted to the first yoke 5 can be released from the exposed portion 8 to the outside of the housing 2. Here, since the exposed portion 8 is exposed from the housing 2, the heat generated by the contact device 3 can be efficiently released. As a result, it is possible to suppress a decrease in current carrying capacity due to heat generation of the contact device 3.
　また、露出部８を設けることで、例えば、ハウジング２の外部から冷却管等の冷却部材を露出部８に接触するように配置することもできる。この場合は、接点装置３の発熱をハウジング２の外部にさらに効率的に逃がすことができる。 By providing the exposed portion 8, for example, a cooling member such as a cooling pipe can be arranged so as to contact the exposed portion 8 from the outside of the housing 2. In this case, the heat generated by the contact device 3 can be more efficiently released to the outside of the housing 2.
　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、電磁駆動装置７の構成が変更されてもよい。ハウジング２、接点ケース１１、接点カバー１２、１対の磁石４、第１ヨーク５、第２ヨーク３７の形状、或いは配置が変更されてもよい。また、第１ヨーク５及び第２ヨーク３７の少なくとも一方は、露出部８を含むことが好ましい。しかしながら、１対の磁石４、第１ヨーク５、及び第２ヨーク３７の少なくともいずれかが露出部８を含んでいればよい。また、露出部８の位置や形状等に合わせてハウジング２の開口部２ｃの形状も変更されてもよい。また、前記実施形態及び以下に記載する変形例を適宜組み合わせて、露出部８を構成してもよい。 The embodiment of the electromagnetic relay according to one aspect of the present invention has been described above, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the configuration of the electromagnetic drive device 7 may be changed. The shape or the arrangement of the housing 2, the contact case 11, the contact cover 12, the pair of magnets 4, the first yoke 5, and the second yoke 37 may be changed. At least one of the first yoke 5 and the second yoke 37 preferably includes the exposed portion 8. However, it is sufficient that at least one of the pair of magnets 4, the first yoke 5, and the second yoke 37 includes the exposed portion 8. Further, the shape of the opening 2c of the housing 2 may be changed according to the position and shape of the exposed portion 8. Further, the exposed portion 8 may be configured by appropriately combining the above-described embodiment and the modified examples described below.
　図６は、第１変形例に係るカバー２ｂ及び接点カバー１２を取り除いたときの電磁継電器１００の平面図である。第１変形例に係る露出部８は、ハウジング２の外部に向かって突出する突出部８ａを含む。その他の構成は、前記実施形態と同様である。突出部８ａは、例えば、第１ヨーク５の一部を折り曲げて形成されている。この場合は、露出部８の表面積が大きくなるので、接点装置３の発熱をハウジング２の外部にさらに効率的に逃がすことができる。なお、突出部８ａの形状は、露出部８の表面積が大きくなるような形状であればよい。 FIG. 6 is a plan view of the electromagnetic relay 100 when the cover 2b and the contact cover 12 according to the first modification are removed. The exposed portion 8 according to the first modified example includes a protruding portion 8 a protruding toward the outside of the housing 2. Other configurations are the same as those in the above embodiment. The protruding portion 8a is formed by bending a part of the first yoke 5, for example. In this case, since the surface area of the exposed portion 8 is large, the heat generated by the contact device 3 can be more efficiently released to the outside of the housing 2. The shape of the protruding portion 8a may be any shape that increases the surface area of the exposed portion 8.
　また、図７に示すように、例えば、突出部８ａは、第２ヨーク３７のヨーク３７ａの一部をハウジング２の外部に向かって突出させて形成してもよい。この場合は、電磁駆動装置７の発熱をハウジング２の外部に効率的に逃がすことができる。 Further, as shown in FIG. 7, for example, the protruding portion 8a may be formed by protruding a part of the yoke 37a of the second yoke 37 toward the outside of the housing 2. In this case, the heat generated by the electromagnetic drive device 7 can be efficiently released to the outside of the housing 2.
　図８は、第２変形例に係る電磁継電器１００を接触方向Ｚ１から見た平面図である。図９は、第２変形例に係る電磁継電器１００を他の部材４０に装着したときの側面図である。他の部材４０とは、例えば、電磁継電器１００を使用する電気機械の取付板である。ハウジング２は、固定部２ｅと、装着部２ｆと、を含む。固定部２ｅは、図示しないねじ部材によって他の部材４０に固定される。装着部２ｆは、他の部材４０に接触して装着される。ここでの装着部２ｆは、ハウジング２のカバー２ｂの開離方向Ｚ２側の表面である。露出部８は、装着部２ｆから露出している。すなわち、第２変形例では、カバー部２ｂに第１ヨーク５の形状に対応する形状の開口部２ｃが形成されており、第１ヨーク５の開離方向Ｚ２側の表面が装着部２ｆから露出している。 FIG. 8 is a plan view of the electromagnetic relay 100 according to the second modification as seen from the contact direction Z1. FIG. 9 is a side view when the electromagnetic relay 100 according to the second modification is attached to another member 40. The other member 40 is, for example, a mounting plate of an electric machine using the electromagnetic relay 100. The housing 2 includes a fixed portion 2e and a mounting portion 2f. The fixing portion 2e is fixed to the other member 40 by a screw member (not shown). The mounting portion 2f is mounted in contact with another member 40. The mounting portion 2f here is the surface of the cover 2b of the housing 2 on the side in the opening direction Z2. The exposed portion 8 is exposed from the mounting portion 2f. That is, in the second modification, the opening 2c having a shape corresponding to the shape of the first yoke 5 is formed in the cover 2b, and the surface of the first yoke 5 on the opening direction Z2 side is exposed from the mounting portion 2f. is doing.
　この場合は、第１ヨーク５を介して接点装置３の発熱を他の部材４０に効率的に逃がすことができる。また、露出部８を他の部材４０と接触するように構成することで、例えば、冷却管を設けて露出部８を冷却する場合の冷却管の設計が容易になる。また、露出部８に突出部８ａを設けた場合に比べて、他の部材の邪魔になる可能性が低い。 In this case, the heat generation of the contact device 3 can be efficiently released to the other member 40 via the first yoke 5. Further, by configuring the exposed portion 8 to be in contact with the other member 40, the design of the cooling pipe when the exposed portion 8 is cooled by providing a cooling pipe, for example, becomes easy. Further, compared to the case where the exposed portion 8 is provided with the protruding portion 8a, there is less possibility of interfering with other members.
　なお、他の部材４０は、絶縁性を有する材料で形成されていることが好ましい。また、通電容量によっては、他の部材４０の材質や大きさ等を適宜調整する必要がある。また、図７に示すように、１対の磁石４を装着部２ｆから露出させて、露出部８として構成してもよい。また、図１０及び図１１に示すように、第１ヨーク５の形状は、接点装置３の構成に応じて適宜変更することができる。すなわち、露出部８の形状は、接点装置３の構成に応じて適宜変更することができる。また、例えば、装着部２ｆがハウジング２のケース２ａの接触方向Ｚ１側の表面に設けられる場合、第２ヨーク３７を装着部２ｆから露出させて、第２ヨーク３７を他の部材４０に接触させて配置してもよい。 Note that the other member 40 is preferably formed of a material having an insulating property. Further, depending on the current carrying capacity, it is necessary to appropriately adjust the material, size, etc. of the other member 40. Further, as shown in FIG. 7, the pair of magnets 4 may be exposed from the mounting portion 2f to form the exposed portion 8. Further, as shown in FIGS. 10 and 11, the shape of the first yoke 5 can be appropriately changed according to the configuration of the contact device 3. That is, the shape of the exposed portion 8 can be appropriately changed according to the configuration of the contact device 3. Further, for example, when the mounting portion 2f is provided on the surface of the housing 2 on the contact direction Z1 side of the case 2a, the second yoke 37 is exposed from the mounting portion 2f and the second yoke 37 is brought into contact with another member 40. You may arrange it.
　本発明によれば、通電時における接点装置又は電磁継電器の発熱を効率的に逃がすことができる電磁継電器を提供することができる。 According to the present invention, it is possible to provide an electromagnetic relay capable of efficiently dissipating heat generated by a contact device or an electromagnetic relay when energized.
２　　　ハウジング
２ｄ　　収容部
２ｆ　　装着部
３　　　接点装置
４　　　１対の磁石（磁石の一例）
６　　　第１ヨーク
７　　　電磁駆動装置
８　　　露出部
８ａ　　突出部
１１　　接点ケース
３７　　第２ヨーク
１００　電磁継電器
  2 housing 2d accommodating part 2f mounting part 3 contact device 4 a pair of magnets (an example of magnets)
6 1st yoke 7 Electromagnetic drive device 8 Exposed part 8a Projection part 11 Contact case 37 2nd yoke 100 Electromagnetic relay

Claims (4)

  1. 収容部を含むハウジングと、
    前記収容部に配置された接点装置と、
    前記収容部の周囲に配置され、前記収容部の内部に磁界を発生させる磁石と、
    　前記磁石に接続され、前記収容部の周囲に配置された第１ヨークと、
    　第２ヨークを含み、前記ハウジングにおいて前記収容部に隣接して配置され、前記接点装置を駆動する電磁駆動装置と、
    を備え、
    　前記磁石、前記第１ヨーク、及び前記第２ヨークの少なくともいずれかは、前記ハウジングから露出する露出部を含む、
    電磁継電器。     A housing including a housing,
    A contact device arranged in the accommodation portion,
    A magnet that is arranged around the housing and that generates a magnetic field inside the housing;
    A first yoke connected to the magnet and arranged around the accommodating portion;
    An electromagnetic drive device that includes a second yoke and that is disposed adjacent to the housing portion in the housing and that drives the contact device;
    Equipped with
    At least one of the magnet, the first yoke, and the second yoke includes an exposed portion exposed from the housing.
    Electromagnetic relay.
  2. 　前記収容部を区画する接点ケースをさらに備え、
    　前記第１ヨークは、前記露出部を含み、前記接点ケースに支持されている、
    請求項１に記載の電磁継電器。     Further comprising a contact case for partitioning the accommodating portion,
    The first yoke includes the exposed portion and is supported by the contact case.
    The electromagnetic relay according to claim 1.
  3. 　前記露出部は、前記ハウジングの外部に向かって突出する突出部を含む、
    請求項１又は２に記載の電磁継電器。     The exposed portion includes a protruding portion protruding toward the outside of the housing,
    The electromagnetic relay according to claim 1 or 2.
  4. 　前記ハウジングは、他の部材に接触して装着される装着部を含み、
    　前記露出部は、前記装着部から露出している、
    請求項１から３のいずれか１項に記載の電磁継電器。
          The housing includes a mounting portion mounted in contact with another member,
    The exposed portion is exposed from the mounting portion,
    The electromagnetic relay according to any one of claims 1 to 3.
PCT/JP2019/036492 2018-10-16 2019-09-18 Electromagnetic relay WO2020080019A1 (en)

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