JP2012199123A - Relay device - Google Patents

Abstract

A relay device that reduces the influence of heat generated in a coil on a contact chamber.
A relay device (1) includes a contact chamber (2) including a fixed contact (15) and a movable contact (16) that moves relative to the fixed contact (15), and a movable contact (16) disposed in the contact chamber (2). A movable portion 17 that is brought into contact with and separated from the fixed contact 15 and an electromagnet portion 22 that has a coil 30 around which a conductive wire is wound and drives the movable portion 17 are provided. A heat conducting member 40 disposed and thermally coupled to the coil 30 is further provided outside the contact chamber 2.
[Selection] Figure 1

Description

  The present invention relates to a relay device.

  Conventionally, as a relay device, there is an electromagnetic relay of Patent Document 1 or the like. The electromagnetic relay includes a core, a coil, a yoke, an armature, an electromagnetic block comprising a movable spring equipped with a movable contact mechanically engaged with the amateur, a normally closed fixed contact and a normally open fixed contact that contact the movable contact. Fixed contact set consisting of, movable contact, normally closed fixed contact, normally open fixed contact, movable contact external connection terminal electrically connected to the coil, normally closed fixed contact external connection terminal, normally open fixed contact An external connection terminal group including an external connection terminal and an external connection terminal for a coil, an electromagnetic block, a fixed contact group, a base on which the external connection terminal group is mounted and fixed, and an exterior cover are included.

JP 2007-165140 A

  However, in the electromagnetic relay having the above-described configuration, the coil and the fixed contact group are disposed in the exterior cover, and heat generated in the coil is difficult to be transmitted to the outside of the electromagnetic relay, and an effect of reducing the coil temperature is expected. It is hard to do. For this reason, the temperature in the contact chamber containing the fixed contact and the movable contact is raised, and the arc extinguishing performance may be lowered due to a decrease in cooling efficiency during arc extinguishing in the contact chamber. Further, a resin member such as a damper rubber for reducing the impact of the movable part or a molding resin for insulation is disposed in the contact chamber, and the resin member is heated by the heat of the coil to generate gas (degas). May cause thermal deformation.

  In view of this situation, an object of the present invention is to provide a relay device that reduces the influence of heat generated in the coil on the contact chamber.

  In order to solve the above-described problems, a relay device according to the present invention includes a contact chamber that includes a fixed contact and a movable contact that moves relative to the fixed contact, and contacts the movable contact with the fixed contact. A movable part to be separated, and an electromagnet part having a coil around which a conductive wire is wound to drive the movable part, and the coil is disposed outside the contact chamber, and the coil and the heat are disposed outside the contact chamber. It further has a heat conduction member coupled to each other.

  As the relay device, the electromagnet part further includes a movable iron core that moves with the excitation of the coil, and a yoke that becomes a part of a magnetic path generated with the excitation of the coil, and the movable part has the movable part A movable shaft that is driven in the axial direction as the iron core moves, and wherein the yoke includes a peripheral wall portion that covers the outer periphery of the coil, and a plate-like portion that covers one end side of the coil in the axial direction, It is preferable that the heat conducting member is disposed between the plate-like portion and the coil.

  As the relay device, the electromagnet part further includes a movable iron core that moves with the excitation of the coil, and a yoke that becomes a part of a magnetic path generated with the excitation of the coil, and the movable part has the movable part A movable shaft that is driven in the axial direction as the iron core moves, and wherein the yoke includes a peripheral wall portion that covers the outer periphery of the coil, and a plate-like portion that covers one end side of the coil in the axial direction, It is preferable that the heat conducting member is disposed between the peripheral wall portion and the coil.

  As the relay device, it is preferable that the electromagnet portion further includes a coil bobbin to which the coil is attached, and the coil bobbin is formed of an insulating material having thermal conductivity.

  As the relay device, it is preferable that the heat conducting member is thermally coupled to an external member.

  As this relay device, it is preferable that the heat conducting member is formed of a metal material whose surface is insulated.

  As this relay device, it is preferable that the heat conducting member is formed of ceramics having insulating properties.

  As the relay device, it is preferable that the heat conducting member is formed of a molded resin.

  In order to solve the above-described problem, the relay device of the present invention includes a contact chamber containing a fixed contact and a movable contact that moves to and away from the fixed contact, and the movable contact with respect to the fixed contact. A movable part to be brought into contact with and separated from, and an electromagnet part having a coil around which a conductive wire is wound to drive the movable part, the coil being disposed outside the contact chamber, and between the coil and the contact chamber A heat insulating member is arranged.

  By adopting such a configuration, it is possible to easily reduce the influence of heat generated in the coil on the contact chamber as compared with the conventional relay device.

It is sectional drawing of the relay apparatus of 1st Embodiment. It is the simplified sectional view of the important section of the modification of a relay device same as the above. It is sectional drawing which simplified the principal part of the relay apparatus of 2nd Embodiment. It is the simplified sectional view of the important section of the modification of a relay device same as the above. It is sectional drawing which simplified the principal part of the relay apparatus of 3rd Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
The relay device 1 of this example is provided in, for example, an electric vehicle or a so-called hybrid vehicle, and is disposed between an in-vehicle battery and an in-vehicle motor, or between the battery and an external power source for charging the battery. This is an on-vehicle DC high-voltage device.

  As shown in FIG. 1, the relay device 1 includes a contact portion 11 that switches between energization and interruption in accordance with contact and separation (contact / separation) of the contact, and a contact chamber 2 that forms a space containing the contact portion 11. And a drive unit that contacts and separates the contact of the contact unit 11.

  The contact chamber 2 has a substantially airtight space or an airtight space in which gas is difficult to escape, and this space is filled with an arc extinguishing gas mainly composed of hydrogen, nitrogen, sulfur hexafluoride or the like. Yes. Therefore, in the relay device 1, the contact of the contact portion 11 is brought into and out of contact in the contact chamber 2 (inside) filled with the arc extinguishing gas.

  The contact chamber 2 has a box-like shape having an opening surface at one end, a case 3 that covers the contact portion 11, a fixing plate 8 that covers the opening surface of the case 3, and a joining member 7 that connects the case 3 and the fixing plate 8. And the main body is comprised by the bottomed cylinder part 10 attached to the fixed plate 8. FIG.

  The case 3 is formed of a material having insulating properties and heat resistance such as ceramics, and two through holes 5 are provided in a bottom portion 4 which is an end portion on the opposite side of the opening surface. Further, the side wall 6 rising from the outer periphery of the bottom part 4 has a gap between the contact part 11, and the case 3 covers the contact part 11 with the bottom part 4 and the side wall 6, and the edge of the opening surface (the side wall 6). The tip is attached to the fixed plate 8 via a frame-shaped joining member 7.

  The fixed plate 8 is formed in a plate shape from a metal material, covers the opening surface of the case 3, and has a through hole 9 in the approximate center of the plate. In addition, the fixed plate 8 has an opening-side end portion of the bottomed cylindrical portion 10 attached to the plate surface opposite to the plate surface to which the joining member 7 is attached.

  The bottomed tube portion 10 is formed of a nonmagnetic metal material such as stainless steel, the space on the inner peripheral side of the bottomed tube portion 10 communicates with the through hole 9, and a part of the drive portion (details will be described later) inside Is housed. A detailed description of the relationship between the bottomed tube portion 10 and the drive unit will be described later together with the drive unit.

  The contact portion 11 includes a fixed terminal 12 fixed to the case 3, a flat plate-shaped movable contact 13 that is moved by the drive unit, and contacts provided on each of the fixed terminal 12 and the movable contact 13. The subject is configured.

  The fixed terminal 12 is formed of a conductive member in the shape of a bottomed cylinder. The bottom end of the cylinder protrudes into the case 3 and is inserted into the through hole 5 and fixed to the case 3. The fixed terminal 12 has a contact (fixed contact 15) fixed to the bottom end. Further, one fixed terminal 12 is provided in each through-hole 5 with its axis substantially perpendicular to the bottom 4.

  The movable contact 13 is made of a conductive material and is formed in a substantially rectangular flat plate shape in plan view, and the longitudinal direction L is arranged substantially parallel to the direction in which the two fixed terminals 12 are arranged. In the movable contact 13, one plate surface faces the fixed contact 15 side, and contacts (movable contacts 16) are fixed to both ends of the plate surface in the longitudinal direction L. The movable contact 16 is connected to the fixed contact 15. Opposite. In addition, the movable contact 13 is provided with a through-hole 14 at the approximate center in the longitudinal direction L and is connected to the drive unit at the approximate center. Hereinafter, for the convenience of explanation, the direction of the movable contact 13 in the longitudinal direction L is simply referred to as the longitudinal direction L, and is used as one of the reference directions.

  The main part of the drive unit is composed of a movable part 17 that contacts and separates the movable contact 16 and an electromagnet part 22 that drives the movable part 17. The movable portion 17 is mainly composed of a contact pressure spring 18 that elastically biases the movable contact 13 toward the fixed terminal 12 and a movable shaft 19 that is driven in the axial direction Ax by the electromagnet portion 22. The drive unit is a so-called plunger type. Hereinafter, for convenience of explanation, the axial direction Ax of the movable shaft 19 is simply referred to as the axial direction Ax, and is used as one of the reference directions.

  One end of the contact pressure spring 18 is fixed to the fixed plate 8, the other end is brought into contact with the plate surface of the movable contact 13 facing the fixed plate 8, and the movable contact 13 is elastically biased, thereby fixing the fixed contact 15. A contact pressure is applied to the movable contact 16 in the direction of contact with the movable contact 16.

  The movable shaft 19 is disposed in the bottomed cylinder portion 10 through the through hole 9, the first end portion 20 projects from the electromagnet portion 22 into the case 3, and the first end portion 20 is inserted into the through hole 14. In this state, the movable contact 13 is prevented from coming off. The second end 21 of the movable shaft 19 is inserted into the iron core (details will be described later) of the electromagnet portion 22 in the bottomed cylindrical portion 10.

  Further, the movable shaft 19 is driven in the axial direction Ax with the excitation of the electromagnet portion 22 and the release of the excitation, and the spring load of the contact pressure spring 18 fluctuates with this driving. Then, the movable contact 13 moves in the axial direction Ax due to the fluctuation of the load, and the movable contact 16 contacts and separates from the fixed contact 15 in the axial direction Ax along with this movement. Therefore, an interval (contact gap) for moving the movable contact 16 to and from the fixed contact 15 is provided between the movable contact 13 and the fixed terminal 12.

  The electromagnet portion 22 includes two cylindrical iron cores arranged in the axial direction Ax, a coil bobbin 26 disposed on the outer periphery of the iron core and attached with a coil 30, a return spring 25 that elastically biases both iron cores away from each other, and a coil 30. The main body is comprised with the yoke 31 which covers the outer side.

  The iron core is mainly composed of a fixed iron core 23 fixed to the fixed plate 8 and a movable iron core 24 that is close to and away from the fixed iron core 23 in the axial direction Ax. Both iron cores are substantially concentric and aligned in the axial direction Ax. It is arrange | positioned in the bottomed cylinder part 10.

  The fixed iron core 23 is arranged with the movable shaft 19 passing through the inner periphery of the cylinder. The fixed iron core 23 has one end fixed to the fixed plate 8, the other end opposed to the movable iron core 24, and a recess in which the return spring 25 is disposed on the other end side.

  The return spring 25 is mainly composed of a coil 30 spring, one end of which is fixed to the recess, and is arranged substantially concentrically with the movable shaft 19 between the fixed iron core 23 and the movable iron core 24. The movable iron core 24 is separated from the fixed iron core 23 in the axial direction Ax. Elastically biased in the direction of separation.

  The movable iron core 24 is substantially concentric with the fixed iron core 23 and is disposed on the bottom side of the bottomed cylindrical portion 10 with respect to the fixed iron core 23, and moves in the axial direction Ax toward the fixed iron core 23 as the coil 30 is excited. Further, the movable iron core 24 has an attachment portion for attaching the second end 21 of the movable shaft 19 on the inner peripheral surface, and the movable shaft 19 is driven in the axial direction Ax by moving the movable iron core 24 in the axial direction Ax. Is done. And the movable shaft 19 can adjust the protrusion amount in the case 3 of the 1st edge part 20 according to the attachment position with the attachment part in the axial direction Ax.

  The coil bobbin 26 is substantially concentric with the movable shaft 19, a cylindrical portion 27 disposed on the outer periphery of the bottomed cylindrical portion 10, a first annular plate portion 28 provided at one end of the cylindrical portion 27, and the cylindrical portion 27. The main body is composed of the second annular plate portion 29 provided at the end portion.

  The coil bobbin 26 is formed by integrally forming a cylindrical portion 27, a first annular plate portion 28, and a second annular plate portion 29 with an insulating material, and the first annular plate portion 28 and the second annular plate portion 29 are larger than the cylindrical portion 27. It has a disk shape with a diameter, and has a through hole in the approximate center. The through hole communicates with the inner circumferential space of the cylindrical portion 27, and the bottomed cylindrical portion 10 is disposed in the inner circumferential space.

  Therefore, the coil bobbin 26 has a hollow cylindrical shape opened to the outer peripheral side, and the coil 30 is disposed in the hollow part of the coil bobbin 26. The coil 30 is formed by winding a conducting wire for excitation around the outer surface of the cylindrical portion 27 in the circumferential direction of the movable shaft 19, and is electrically connected to an external excitation power source or excitation control means via a conductive member. It is connected to the.

  The yoke 31 is formed of a material having rigidity and conductivity, such as a metal material, and functions as a part of the magnetic path when a magnetic path (path of magnetic lines) is generated as the coil 30 is excited. The yoke 31 is mainly composed of a cylindrical peripheral wall portion 32 that covers the outer peripheral side of the coil bobbin 26 and two plate-like portions 33 that cover both ends of the coil bobbin 26 in the axial direction Ax. The two plate-like portions 33 are classified into an upper plate 34 that covers the first annular plate portion 28 side of the coil bobbin 26 and a lower plate 35 that covers the second annular plate portion 29 side of the coil bobbin 26.

  The peripheral wall portion 32 is disposed outside the contact chamber 2, and one end in the axial direction Ax of the peripheral wall portion 32 is connected to the outer peripheral end of the plate surface facing the second annular plate portion 29 side of the lower plate 35. And the lower plate 35 are integrally formed. The lower plate 35 is provided with a through hole 36 at substantially the center, the bottom end portion of the bottomed tube portion 10 projects from the through hole 36, and the peripheral surface of the bottomed tube portion 10 is the periphery of the through hole 36. It is in contact with.

  The upper plate 34 has a through-hole 9 at substantially the center of the plate, and the end portion on the opening side of the bottomed cylindrical portion 10 is fixed to one plate surface, which also serves as the fixed plate 8, and is bonded to one plate surface. The case 3 is attached via the member 7 and covers the opening surface of the case 3. The upper plate 34 is fixed to the peripheral wall portion 32 at the outer peripheral end of the surface facing the first annular plate portion 28 which is the other plate surface, and the yoke 31 covers the outside of the coil 30.

  Further, a heat conductive member 40 is disposed between the upper plate 34 and the first annular plate portion 28, and one end surface of the heat conductive member 40 is in contact with the upper plate 34, and the other one end surface is the first. The coil 30 and the upper plate 34 are brought into thermal contact with each other via the heat conducting member 40 in contact with the annular plate portion 28. The upper plate 34 is brought into contact with an external member (not shown) that transmits heat of the heat conducting member 40 and is thermally coupled to the external member. It is thermally coupled to the external member via

  The heat conductive member 40 is formed of a metal material that has surface treatment such as surface oxidation treatment or insulating plating and has both insulation and heat conductivity on the surface. As a specific example, anodized aluminum and the like It has become. The external member is, for example, a heat radiating member such as a heat radiating plate, a vehicle body such as a body or a frame, a bus bar, or the like.

  Moreover, the relay apparatus 1 comprised as mentioned above operate | moves as follows. Before the excitation of the coil 30, the movable iron core 24 and the fixed iron core 23 are opposed to each other with a predetermined distance (contact gap) by the biasing of the return spring 25, and the movable contact 16 and the fixed contact 15 are contacted with each other. To face each other. Therefore, the contact part 11 before the excitation of the coil 30 is in a cut-off state in which the electrical connection between the two fixed contacts 15 is cut off.

  When the coil 30 is excited, the movable iron core 24 is attracted and moved by the fixed iron core 23, and the movable shaft 19 is driven to the fixed terminal 12 side. With this driving, the position restriction of the movable contact 13 in the axial direction Ax is released, and the movable contact 13 is moved to the fixed terminal 12 side by the elastic bias of the contact pressure spring 18. As the movable contact 13 moves, the movable contact 16 approaches the fixed contact 15. When the movable contact 16 comes into contact with the fixed contact 15, the movement of the movable contact 13 and the movable contact 16 in the axial direction Ax stops. The contact portion 11 is switched to a conductive state in which the two fixed contacts 15 are electrically connected via the movable contact 13 by bringing the movable contact 16 into contact with the fixed contact 15. In this conductive state, the movable contact 16 is pressed against the fixed contact 15 by the elastic biasing of the contact pressure spring 18 and is held in contact.

  When the coil 30 is de-energized from this excited state, the movable iron core 24 is moved mainly away from the fixed iron core 23 by the urging force of the return spring 25, and is separated from the fixed iron core 23 by a predetermined distance (contact gap). The state before excitation is restored. The movable contact 16 is released from contact with the fixed contact 15 by driving the movable shaft 19 accompanying the movement of the movable iron core 24, and is opposed to the fixed contact 15 with a predetermined distance (contact gap). The contact part 11 returns to the interruption state. Note that an arc generated between the movable contact 16 and the fixed contact 15 at the time of return is stretched in the longitudinal direction L by a magnetic field (magnetic field) of a magnetic field generator (not shown) disposed outside the contact chamber 2. Arc extinguished.

  By the way, the coil 30 may generate heat when excited. In the relay device 1, the heat generated in the coil 30 is easily transmitted to the upper plate 34 via the heat conducting member 40, and the heat of the upper plate 34 is easily transmitted to the aforementioned external member.

  Therefore, the heat of the coil 30 becomes difficult to be transferred into the contact chamber 2, the temperature rise in the contact chamber 2 is easily suppressed, and the arc extinguishing performance such as a decrease in cooling efficiency in the contact chamber 2 during arc extinction is reduced. Is easily reduced. And since it becomes easy to suppress the temperature rise of the member arrange | positioned in the contact chamber 2, generation | occurrence | production of gas (degassing) from resin members, such as damper rubber (not shown) in the contact chamber 2, or the said resin member It is easy to suppress the occurrence of thermal deformation. In this way, the thermal influence on the contact chamber 2 is easily reduced.

  The heat of the coil 30 is easily transmitted to the yoke 31 via the heat conducting member 40, so that the heat of the coil 30 is not easily accumulated in the coil 30 or the coil bobbin 26. Therefore, the temperature rise of the coil 30 and the coil bobbin 26 due to this heat is easily reduced, and the degassing of the coating covering the conductive wire of the coil 30 and the coil bobbin 26 due to the temperature rise is easily suppressed. Further, since the coil 30 and the coil bobbin 26 are disposed outside the contact chamber 2, even if gas is generated from the coil 30 and the coil bobbin 26, the gas hardly enters the contact chamber 2, and the gas is generated in the contact chamber 2 by the gas. Contamination is less likely to occur.

  In addition, for example, as shown in FIG. 2, the thermal connection with the external member is performed by providing the connection member 41 at one end in the longitudinal direction L of the upper plate 34 to assist the thermal connection. The yoke 31 and the external member may be thermally coupled to each other. The connection member 41 may be formed integrally with the upper plate 34 or may be formed of a member separate from the upper plate 34. Alternatively, the heat conducting member 40 and the connecting member 41 may be directly thermally coupled, and the heat conducting member 40 and the external member may be thermally coupled via the connecting member 41.

In addition, the heat conductive member 40 is not limited to a metal material, and may be any material having both insulating properties and heat conductivity. . Examples of the molding resin include a resin mixed with a metal filler such as aluminum and copper, and a resin mixed with a ceramic filler such as boron nitride (BN), aluminum nitride (AlN), and alumina (Al ₂ O ₃ ). Is preferred.

  In addition, the external member that is thermally coupled to the heat conducting member 40 is not limited to the illustrated member, and may be any member that does not easily cause problems such as thermal deformation and malfunction due to the transmitted heat.

  In addition, this relay apparatus provided with the heat conductive member is not restricted to a relay apparatus for direct current high voltage as a matter of course.

(Second Embodiment)
Unlike the embodiment shown in FIG. 1, the relay device 1 of the second embodiment has a heat conducting member 40 disposed between a portion other than the upper plate 34 of the yoke 31 and the coil 30. In addition, the description which overlaps with the substantially same structure as the above-mentioned 1st Embodiment is abbreviate | omitted, and the same code | symbol is attached | subjected to the substantially same or substantially equivalent structure.

  As shown in FIG. 3, the heat conducting member 40 is integrally disposed between the coil 30 and the peripheral wall portion 32 and between the second annular plate portion 29 of the coil bobbin 26 and the lower plate 35. Reference numeral 40 is in contact with the coil 30, the second annular plate portion 29, the lower plate 29, and the peripheral wall portion 32. Therefore, the coil 30 is thermally coupled to the lower plate 29 and the peripheral wall portion 32. The yoke 31 is brought into contact with the external member and is thermally coupled to the external member. The coil bobbin 26 has a space between the first annular plate portion 28 and the upper plate 34.

  Therefore, the heat of the coil 30 is easily transmitted from the peripheral wall portion 32 and the lower plate 35 to the yoke 31 via the heat conducting member 40, and the heat transmitted to the yoke 31 is easily transmitted from the yoke 31 to the external member. It has become. Since the heat of the coil 30 is easily transmitted to the external member, the heat of the coil 30 is hardly transmitted to the contact chamber 2, and the thermal influence on the contact chamber 2 due to the heat of the coil 30 is more easily reduced.

  In addition, the relay device 1 including the heat conducting member 40 may form all or part of the coil bobbin 26 with an insulating material having heat conductivity. In the relay device 1, the heat of the coil 30 is easily transmitted to the heat conducting member 40 via the coil bobbin 26, and the temperature rise of the coil 30 is more easily reduced.

  In addition, for example, as shown in FIG. 4, the thermal coupling with the external member is performed by providing a connecting member 41 that assists the thermal coupling on the outer surface of the peripheral wall portion 32, thereby connecting the yoke via the connecting member 41. 31 and an external member may be thermally coupled. Note that the connection member 41 may be provided on the lower plate 35, and the connection member 41 may be formed integrally with the yoke 31 or may be formed of a member separate from the yoke 31. Alternatively, the heat conducting member 40 and the connecting member 41 may be directly thermally coupled, and the heat conducting member 40 and the external member may be thermally coupled via the connecting member 41.

In addition, the heat conductive member 40 is not limited to a metal material, and may be any material having both insulating properties and heat conductivity. . Examples of the molding resin include a resin mixed with a metal filler such as aluminum and copper, and a resin mixed with a ceramic filler such as boron nitride (BN), aluminum nitride (AlN), and alumina (Al ₂ O ₃ ). Is preferred.

  In addition, the external member that is thermally coupled to the heat conducting member 40 is not limited to the illustrated member, and may be any member that does not easily cause problems such as thermal deformation and malfunction due to the transmitted heat.

  In addition, this relay apparatus provided with the heat conductive member is not restricted to a relay apparatus for direct current high voltage as a matter of course.

(Third embodiment)
Unlike the embodiment shown in FIG. 1, the relay device 1 of the third embodiment has a heat insulating member 42 disposed between the coil 30 and the yoke 31 instead of the heat conducting member 40. In addition, the description which overlaps with the substantially same structure as the above-mentioned 1st Embodiment is abbreviate | omitted, and the same code | symbol is attached | subjected to the substantially same or substantially equivalent structure.

  As shown in FIG. 5, the heat insulating member 42 is disposed between the upper plate 34 and the first annular plate portion 28, and one end surface of the heat insulating member 42 is in contact with the upper plate 34, and the other one end surface is Abutting against the first annular plate portion 28, it is difficult to transfer heat generated in the coil 30 to the upper plate 34. Therefore, the temperature rise in the contact chamber 2 due to the heat of the coil 30 is easily suppressed, and the thermal influence of the contact chamber 2 is easily reduced.

  And the heat insulation member 42 should just be a material which has insulation and heat insulation, for example, is comprised mainly by foaming resin etc.

  In addition, this relay apparatus provided with the heat insulation member is not restricted to a relay apparatus for direct current high voltage as well as an in-vehicle relay apparatus.

DESCRIPTION OF SYMBOLS 1 Relay apparatus 2 Contact chamber 15 Fixed contact 16 Movable contact 17 Movable part 18 Contact pressure spring 19 Movable shaft 22 Electromagnet part 23 Fixed iron core 24 Movable iron core 26 Coil bobbin 30 Coil 31 yoke 32 Peripheral wall part 33 Plate-shaped part 40 Thermal conduction member 42 Thermal insulation member Ax Axial direction

Claims (9)

A contact chamber containing a fixed contact and a movable contact that moves to and away from the fixed contact; a movable part that contacts and separates the movable contact from the fixed contact; and a coil wound with a conductive wire. An electromagnet part for driving the movable part,
Placing the coil outside the contact chamber;
A relay device further comprising a heat conducting member thermally coupled to the coil outside the contact chamber. The electromagnet part further includes a movable iron core that moves with the excitation of the coil, and a yoke that becomes a part of a magnetic path generated with the excitation of the coil,
The movable part includes a movable shaft that is driven in the axial direction as the movable iron core moves.
The yoke includes a peripheral wall portion that covers the outer periphery of the coil, and a plate-like portion that covers one end side in the axial direction of the coil.
The relay device according to claim 1, wherein the heat conducting member is disposed between the plate-like portion and the coil. The electromagnet part further includes a movable iron core that moves with the excitation of the coil, and a yoke that becomes a part of a magnetic path generated with the excitation of the coil,
The movable part includes a movable shaft that is driven in the axial direction as the movable iron core moves.
The yoke includes a peripheral wall portion that covers the outer periphery of the coil, and a plate-like portion that covers one end side in the axial direction of the coil.
The relay device according to claim 1, wherein the heat conducting member is disposed between the peripheral wall portion and the coil. The electromagnet part further comprises a coil bobbin to which the coil is attached,
The relay device according to claim 1, wherein the coil bobbin is formed of an insulating material having thermal conductivity.   The relay device according to claim 1, wherein the heat conducting member is thermally coupled to an external member.   The relay device according to claim 1, wherein the heat conducting member is formed of a metal material whose surface is insulated.   6. The relay device according to claim 1, wherein the heat conducting member is formed of an insulating ceramic.   The relay device according to claim 1, wherein the heat conducting member is formed of a molded resin. A contact chamber containing a fixed contact and a movable contact that moves to and away from the fixed contact; a movable part that contacts and separates the movable contact from the fixed contact; and a coil wound with a conductive wire. An electromagnet part for driving the movable part,
Placing the coil outside the contact chamber;
A relay device comprising a heat insulating member disposed between the coil and the contact chamber.

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