JP2019036432A - Electromagnetic relay - Google Patents

Abstract

To provide an electromagnetic relay that can extinguish arcs by using ablation gas.SOLUTION: An electromagnetic relay comprises: a contact case (20); a pair of stationary terminals (31, 32) that have a pair of stationary contact parts (33, 34); a movable contactor (40) that has a pair of movable contact parts (41, 42) corresponding to the pair of stationary contact parts (33, 34); and a lid part (37) that can open/close a through hole. In a contact state where the pair of movable contact parts (41, 42) are in contact with the pair of stationary contact parts (33, 34), the lid part (37) cooperating with the movable contactor (40) opens the through hole (251), whereas in an opened state where the pair of movable contact parts (41, 42) are separated from the pair of stationary contact parts (33, 34), the lid part (37) cooperating with the movable contactor (40) closes the through hole (251).SELECTED DRAWING: Figure 2

Description

  The present invention relates to an electromagnetic relay.

  In Patent Document 1, a housing having an accommodating portion therein, a pair of fixed terminals each fixed to the housing and having a fixed contact portion, and a pair arranged so as to be able to contact and separate from each fixed contact portion There is disclosed an electromagnetic relay having a movable contact portion and a movable contact member movable in a contact / separation direction in which each movable contact portion contacts or separates from a corresponding fixed contact portion. In this electromagnetic relay, an air passage communicating with the housing portion and the outside of the housing is provided, and an arc generated when each movable contact portion comes into contact with or is separated from the corresponding fixed contact portion through the air passage. The arc gas is discharged outside the housing.

Japanese Patent No. 3997700

  By the way, in order to effectively extinguish an arc generated inside the housing part, for example, it is conceivable to arrange a resin material inside the housing part and use an ablation gas generated from the resin material. However, since the electromagnetic relay is provided with an air passage communicating with the housing portion and the outside of the housing, it is difficult to keep the ablation gas generated from the resin material in the housing portion, and the arc using the ablation gas is extinguished. There are cases where arcing cannot be performed.

  Accordingly, an object of the present invention is to provide an electromagnetic relay capable of extinguishing an arc using an ablation gas.

The electromagnetic relay of one embodiment of the present invention is
A box-shaped contact case having a closed space provided inside, and a through hole communicating with the inside of the closed space and the outside of the closed space;
A pair of fixed terminals respectively fixed to the contact case electrically independently from each other and having a pair of fixed contact portions disposed in the closed space;
A pair of movable contact portions disposed in the closed space and opposed to the pair of fixed contact portions, respectively, and each of the pair of movable contact portions is in contact with the corresponding pair of fixed contact portions. And a movable contact disposed so as to be movable in an opening direction in which each of the pair of movable contact portions is separated from the corresponding pair of fixed contact portions,
A lid that is coupled to the movable contact and capable of opening and closing the through hole in conjunction with movement of the movable contact in the contact direction and the opening direction;
When the pair of movable contact portions are in contact with the pair of fixed contact portions, the lid portion interlocked with the movable contact opens the through hole, while the pair of movable contact portions Is configured to close the through hole when the lid is interlocked with the contact when the pair is in a separated state with respect to the pair of fixed contact portions.

  According to the electromagnetic relay of the above aspect, when each movable contact portion is in contact with the corresponding fixed contact portion, the lid portion interlocked with the movable contact opens the through hole of the contact case, When each movable contact portion is in the separated state separated from the corresponding fixed contact portion, the lid portion interlocked with the movable contact is configured to close the through hole of the contact case. Thereby, for example, when the ablation gas generation source is arranged inside the enclosed space, the generated ablation gas is stored inside the enclosed space, and an effective arc extinction using the ablation gas can be performed. .

  In the electromagnetic relay of the above aspect, when each movable contact portion comes into contact with the corresponding fixed contact portion, the lid portion interlocked with the movable contact opens the through hole of the contact case, and the gas inside the closed space Therefore, it is possible to suppress the swelling of the contact case due to the gas inside the closed space.

The perspective view of the electromagnetic relay of one Embodiment of this invention. Sectional drawing along the II-II line of FIG. The schematic diagram for demonstrating the electromagnetic relay of FIG. 1 of a reset state. The schematic diagram for demonstrating the electromagnetic relay of FIG. 1 of an operation state. The schematic diagram for demonstrating the 1st modification of the electromagnetic relay of FIG. The schematic diagram for demonstrating the 1st modification of the electromagnetic relay of FIG. 1 following FIG. The schematic diagram for demonstrating the 1st modification of the electromagnetic relay of FIG. 1 following FIG. The schematic diagram for demonstrating the 2nd modification of the electromagnetic relay of FIG. The schematic diagram for demonstrating the 3rd modification of the electromagnetic relay of FIG. The schematic diagram for demonstrating the 3rd modification of the electromagnetic relay of FIG. 1 following FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, terms indicating specific directions or positions as necessary (for example, terms including “up”, “down”, “right”, “left”, “end”, “side”) However, the use of these terms is to facilitate understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meaning of these terms. Further, the following description is merely illustrative in nature and is not intended to limit the present invention, its application, or its use. Furthermore, the drawings are schematic, and the ratios of dimensions and the like do not necessarily match the actual ones.

  As shown in FIGS. 1 and 2, an electromagnetic relay 1 according to an embodiment of the present invention includes a box-shaped contact case 20, a first fixed terminal 31 that is electrically fixed to the contact case 20 independently of each other, and A second fixed terminal 32 and a movable contact 40 arranged so as to be movable in a direction approaching or separating from each fixed terminal 31, 32 are provided. The contact case 20 is provided with a closed space 24 provided inside, and a through hole 251 communicating with the inside of the closed space 24 and the outside of the closed space 24. The through hole 251 can be opened and closed by a lid portion 37. The closed space 24 refers to a space in which gas can be stored, for example.

  In this embodiment, the electromagnetic relay 1 includes an insulating housing 10 as an example, and the contact case 20 is disposed inside the housing 10.

  Each of the first fixed terminal 31 and the second fixed terminal 32 has a first fixed contact portion 33 and a second fixed contact portion 34 inside the contact case 20. The movable contact 40 has a first movable contact portion 41 and a second movable contact portion 42 that face the first fixed contact portion 33 and the second fixed contact portion 34, respectively.

  The electromagnetic relay 1 is provided symmetrically with respect to the center line CL passing through the centers of the first fixed terminal 31 and the second fixed terminal 32 except for the housing 10 in the cross-sectional view shown in FIG.

  As shown in FIG. 1, the housing 10 includes a case 11 and a cover 12. Each of the case 11 and the cover 12 has, for example, a substantially rectangular parallelepiped shape and a hollow box shape, and an opening surface is provided on one surface as shown in FIG. The cover 12 is attached to the case 11 with the opening surface of the cover 12 facing the opening surface of the case 11. The bottom wall 121 of the cover 12 that faces the opening surface of the cover 12 is provided with two circular terminal holes 13 that are spaced apart in the longitudinal direction (that is, the left-right direction in FIG. 2). ing. A first fixed terminal 31 and a second fixed terminal 32 are arranged in each terminal hole 13, respectively.

  The contact case 20 has a substantially rectangular parallelepiped shape, and includes a ceramic plate 21, a flange portion 22, and a first yoke 23 as shown in FIG. 2, and a closed space 24 is formed therein.

  The ceramic plate 21 is disposed inside the housing 10 so as to be adjacent to the bottom wall portion 121 of the cover 12 and extends along the bottom wall portion 121. A first fixed terminal 31 and a second fixed terminal 32 are fixed to the ceramic plate 21. The flange portion 22 extends from the end of the ceramic plate 21 on the opening surface side of the cover 12 (that is, the lower side in FIG. 2) toward the bottom wall portion 111 of the case 11 facing the opening surface of the case 11. To the inside of the case 11. The first yoke 23 is disposed substantially parallel to the ceramic plate 21 inside the case 11, and the end portion of the flange portion 22 on the case 11 side is connected to the outer peripheral edge portion thereof. A through hole 231 that communicates with the closed space 24 and the outside of the contact case 20 along the center line CL is provided at a substantially central portion of the first yoke 23.

  In addition, an insulating magnet holder 25 that holds the first magnet portion 51 and the second magnet portion 52 is provided in the closed space 24. The magnet holder 25 penetrates the first yoke 23 along the flange portion 22 and the first yoke 23 from a portion farther from the center line CL than the first fixed terminal 31 and the second fixed terminal 32 of the ceramic plate 21. It extends to the outside of the contact case 20 through the hole 231. A through hole 251 that communicates with the closed space 24 and the outside of the contact case 20 along the center line CL is provided at a substantially central portion of the magnet holder 25. That is, the through hole 231 of the first yoke 23 is covered with the magnet holder 25, and the inside of the closed space 24 and the outside of the closed space 24 are connected via the through hole 251 of the magnet holder 25 (that is, The through hole 251 of the magnet holder 25 is an example of the through hole of the contact case 20). A substantially cylindrical rod-like movable shaft 35 is disposed in the through hole 251 so as to be movable along the center line CL.

  The movable shaft 35 extends from the closed space 24 to the outside of the contact case 20, and a movable contact 40 is connected to an end portion on the closed space 24 side, and an electromagnetic wave (to be described later) is connected to an outer end portion of the contact case 20. The movable iron piece 65 of the drive unit 60 is connected. In addition, a lid portion 37 extending from the movable shaft 35 in a direction orthogonal to the center line CL is provided at an intermediate portion of the movable shaft 35 in the closed space 24. The lid portion 37 is disposed so as to be able to contact the area around the through hole 251 of the magnet holder 25 when the movable contact portions 41 and 42 are moved in a direction away from the corresponding fixed contact portions 33 and 34. Has been. That is, the lid portion 37 is connected to the movable contact 40 and is provided so as to be able to open and close the through-hole 251 in conjunction with the movement of the movable contact 40 in the contact direction and the opening direction. 40 movement ranges are regulated. A coil spring 36 that extends and contracts along the movable shaft 35 is provided around the movable shaft 35 in the closed space 24. The coil spring 36 is disposed between the coil spring holding portion 352 that is locked to the lid portion 37 of the movable shaft 35 and the movable contact 40.

  As shown in FIGS. 1 and 2, each of the first fixed terminal 31 and the second fixed terminal 32 has, for example, a substantially cylindrical shape, and is fixed to the ceramic plate 21 electrically independently from each other. Each of the first fixed terminal 31 and the second fixed terminal 32 is arranged at a distance from each other along the arrangement direction (that is, the left-right direction in FIG. 2), and a part thereof is located in the closed space 24. Yes.

  As shown in FIG. 2, a first fixed contact portion 33 and a second fixed contact portion 34 are provided on the end surfaces of the first fixed terminal 31 and the second fixed terminal 32 on the closed space 24 side, respectively. The fixed contact portions 33 and 34 may be formed integrally with the corresponding fixed terminals 31 and 32 or may be formed separately from the corresponding fixed terminals 31 and 32.

  The movable contact 40 has a substantially rectangular plate shape, and as shown in FIG. 2, the first movable contact 41 and the second movable contact 42 facing the first fixed contact 33 and the second fixed contact 34, respectively. have. A movable shaft 35 that is movable along the center line CL is connected to a substantially central portion of the movable contact 40. That is, each of the first movable contact portion 41 and the second movable contact portion 42 contacts or separates along the center line CL with respect to the first fixed contact portion 33 and the second fixed contact portion 34, and the movable contact 40 The contact direction in which each of the first movable contact portion 41 and the second movable contact portion 42 contacts the first fixed contact portion 33 and the second fixed contact portion 34 and the first movable contact portion 41 and the second movable contact portion. Each of the portions 42 is disposed so as to be movable in a separating direction that separates the first fixed contact portion 33 and the second fixed contact portion 34. Further, the first movable contact portion 41 and the second movable contact portion 42 are electrically connected to each other by the movable contact 40. The movable contact portions 41 and 42 may be formed integrally with the movable contact 40 or may be formed separately from the movable contact 40.

  As shown in FIG. 2, each of the first magnet unit 51 and the second magnet unit 52 is configured by a substantially rectangular parallelepiped permanent magnet, and the first movable contact unit 41 and the second movable contact unit 42 of the movable contact 40. Are arranged so that the movable contact 40 is positioned between them in the arrangement direction (ie, the left-right direction in FIG. 2).

  As shown in FIG. 2, the electromagnetic drive unit 60 includes an electromagnet unit 61 having a through hole 611 extending along the center line CL and having the movable shaft 35 disposed at a substantially central part, and the electromagnet unit 61 together with the first yoke 23. The first yoke 23 and the second yoke 64 surrounding the movable shaft 35, the movable iron piece 65 disposed in the through hole 611 of the electromagnet portion 61 and connected to the movable shaft 35, and the through hole 611 of the electromagnet portion 61. And a fixed iron piece 66 connected to the first yoke 23. The electromagnetic drive unit 60 drives the movable shaft 35 in accordance with excitation / de-excitation of the electromagnetic magnet unit 61.

  The electromagnet portion 61 includes an insulating spool 62 provided with a through-hole 611, a coil 63 wound around the spool 62, and a coil terminal (not shown) fixed to the spool 62. Yes. The second yoke 64 has, for example, a substantially U shape in the sectional view shown in FIG. One end of the fixed iron piece 66 is located between the first yoke 23 and the magnet holder 25 in a direction intersecting the center line CL. A through hole 661 extending along the center line CL is provided in a substantially central portion of the fixed iron piece 66. In the through-hole 661, the movable shaft 35 is disposed so as to be movable along the center line CL with a gap therebetween. In addition, in the through hole 611 of the electromagnet portion 61, a return spring 67 as an example of an urging portion is provided between the fixed iron piece 66 and the movable iron piece 65.

  Next, the operation of the electromagnetic relay 1 will be described with reference to FIGS. 3 and 4, the housing 10 is omitted.

  2 and 3 show the electromagnetic relay 1 in the return state (that is, the separated state in which the movable contact portions 41 and 42 are separated from the corresponding fixed contact portions 33 and 34). In the electromagnetic relay 1 in the restored state, the lid portion 37 closes the through hole 251 of the magnet holder 25 on the closed space 24 side. In the electromagnetic relay 1 in the return state, the lid portion 37 is urged in the separating direction by the elastic force of the return spring 67 and pressed against the magnet holder 25. Thereby, the airtightness of the closed space 24 is improved. In addition, the position of the movable contact 40 at the time of a return state is set to the open position P1 (shown in FIG. 3).

  In the electromagnetic relay 1 in the restored state, when a current is supplied to the coil 63 of the electromagnet portion 61, a magnetic attractive force is generated between the movable iron piece 65 and the fixed iron piece 66 connected to the movable shaft 35. Due to this magnetic attractive force, the movable iron piece 65 is magnetically attracted to the fixed iron piece 66 against the elastic force of the return spring 67, and the movable shaft 35 moves in the contact direction. As a result, the movable contact 40 moves in the contact direction, the movable contact portions 41 and 42 come into contact with the corresponding fixed contact portions 33 and 34, and the electromagnetic relay 1 is in the operating state shown in FIG. (That is, the contact state where each movable contact portion 41, 42 contacts the corresponding fixed contact portion 33, 34). In the electromagnetic relay 1 in the operating state, the lid portion 37 interlocked with the movement of the movable contact 40 in the contact direction opens the through hole 251 of the magnet holder 25. Note that the position of the movable contact 40 in the operating state is defined as a contact position P2.

  The flow of gas flowing from the inside of the closed space 24 to the outside of the closed space 24 when the through hole 251 of the magnet holder 25 is opened by the lid portion 37 is shown by the dotted arrow A1 and the dotted arrow A2 in FIG. . The gas inside the closed space 24 is, for example, a gap between the movable shaft 35 and the fixed iron piece 66, a gap between the movable iron piece 65 and the fixed iron piece 66, or the electromagnet portion 61 from the through hole 251 of the magnet holder 25. The case 11 and the cover 12 are sequentially passed through a gap between the spool 62 and the fixed iron piece 66, a gap between the first yoke 23 and the spool 62, and a gap between the first yoke 23 and the inner surface of the case 11. It flows to the outside of the housing 10 through a gap between them.

  Further, in the electromagnetic relay 1 in the operating state, when the supply of current to the coil 63 of the electromagnet unit 61 is stopped, the magnetic attractive force that has attracted the movable iron piece 65 disappears, and the movable spring 65 is moved by the elastic force of the return spring 67. The shaft 35 moves in the opening direction. As a result, the movable contact 40 moves in the opening direction, the movable contact portions 41 and 42 are separated from the corresponding fixed contact portions 33 and 34, and the electromagnetic relay 1 is returned from the operating state. At this time, the lid portion 37 interlocked with the movement of the movable contact 40 in the opening direction closes the through hole 251 of the magnet holder 25.

  That is, the electromagnetic relay 1 is between the opening position P1 where the electromagnetic relay 1 is in the open state (that is, the return state) and the contact position P2 where the electromagnetic relay 1 is in the contact state (that is, the operating state). It is configured to be movable along the contact direction or the separation direction.

  The electromagnetic relay 1 is a lid that is interlocked with the movement of the movable contact 40 in the contact direction when the movable contact portions 41, 42 are in contact with the corresponding fixed contact portions 33, 34. While the portion 37 opens the through-hole 251, when the movable contact portions 41, 42 are in the separated state separated from the corresponding fixed contact portions 33, 34, the movable contact 40 is moved in the opening direction. A lid portion 37 that is linked to the movement of is closed so as to close the through-hole 251. Thereby, when each movable contact part 41 and 42 in a contact state is opened with respect to the corresponding fixed contact part 33 and 34, the lid part 37 interlocked with the movement of the movable contact 40 in the opening direction is a contact point. Since the through hole 251 of the case 20 is closed, for example, when an ablation gas generation source is arranged in the closed space 24, the generated ablation gas is stored in the closed space 24, and the ablation gas is effectively used. Arc can be extinguished.

  Further, when each movable contact portion 41, 42 contacts the corresponding fixed contact portion 33, 34, the lid portion 37 interlocked with the movement of the movable contact 40 in the contact direction opens the through hole 251 of the contact case 20. In addition, since the gas inside the closed space 24 can be discharged, the swelling of the contact case 20 due to the gas inside the closed space 24 can be suppressed.

  In the electromagnetic relay 1, the ablation gas generation source may be provided inside the closed space 24, or the ablation gas generation source may not be provided inside the closed space 24. When the electromagnetic relay 1 includes an ablation gas generation source in the closed space 24, the ablation gas generation source is made of resin (for example, unsaturated polyester resin, specifically nylon or PBP (polyptadiene polyol)). can do. The ablation gas generation source may be disposed inside the closed space 24 by, for example, configuring part or all of the magnet holder 25 with the resin, or as shown in FIGS. 3 and 4, with the resin. The configured member 70 may be disposed inside the closed space 24. Thus, by providing the ablation gas generation source arranged in the closed space 24, it is possible to perform effective arc extinguishing using the ablation gas.

  Moreover, you may comprise the part which contacts the contact case 20 (in this embodiment, the magnet holder 25) in the cover part 37 at least when the through-hole 251 of the magnet holder 25 is closed with elastic members, such as rubber | gum. Thereby, when the cover part 37 closes the through-hole 251 of the magnet holder 25, the collision sound generated by the cover part 37 colliding with the contact case 20 can be reduced.

  The lid portion 37 may be provided separately from the movable shaft 35 or may be provided integrally with the movable shaft 35. For example, by providing the lid portion 37 integrally with the movable shaft 35, the number of parts of the electromagnetic relay 1 can be reduced, and the manufacturing cost of the electromagnetic relay 1 can be reduced.

  As shown in FIGS. 5 to 7, the lid portion 37 has a plate-like lateral plate portion 371 having a plate surface that can open and close the through holes 251 of the magnet holder 25 as viewed from the contact / separation direction and extends in the arrangement direction, It can be configured with a vertical plate portion 372 provided over the entire outer peripheral edge of the horizontal plate portion 371 and extending from the horizontal plate portion 371 in the separating direction. At this time, for example, a protrusion 252 that is provided over the entire periphery of the opening edge of the through hole 251 of the magnet holder 25 on the closed space 24 side and that can be fitted to the opening 38 formed by the vertical plate 372 is provided. Accordingly, the cover 37 starts to close the through hole 251 at the intermediate position P3 in FIG. 6 while the movable contact 40 moves from the contact position P2 in FIG. 5 to the separation position P1 in FIG. can do. As described above, the lid portion 37 starts to close the through-hole 251 while the movable contact 40 moves from the contact position P2 to the separation position P1, so that the lid portion 37 is adapted to the generation of the arc. The through hole 251 can be opened and closed. For this reason, for example, when an ablation gas generation source is disposed in the closed space 24, the ablation gas generated in the closed space 24 is effectively stored, and more effective arc extinction using the ablation gas is achieved. Arc can be done. 5 to 7, the housing 10 is omitted.

  As shown in FIG. 8, a biasing portion that biases the end of the movable shaft 35 on the side close to the electromagnetic driving portion 60 in a direction in which the lid portion 37 closes the through hole 251 (ie, downward in FIG. 8). An example coil spring 80 may be provided. For example, the coil spring 80 is arranged in a state of being extended longer than the natural length in the return state shown in FIG. Thereby, since the cover part 37 closes the through-hole 251 of the contact case 20 more reliably, the gas generated by the arc generated between the movable contact parts 41 and 42 and the corresponding fixed contact parts 33 and 34 is reduced. It can be reliably stored in the closed space 24. Further, since the coil spring 80 urges the movable shaft 35 in the opening direction, the lid portion 37 is pressed against the contact case 20 by the urging force of the coil spring 80 in the return state. Thereby, the airtightness of the closed space 24 can be improved.

  In the electromagnetic relay 1, the electromagnetic drive unit 60 is disposed outside the contact case 20 and on the side of the contact case 20 in the opening direction, and the movable contact portions 41 and 42 are on the electromagnetic drive unit 60 side of the movable contact 40. (That is, when the movable contact 40 approaches the first fixed terminal 31 and the second fixed terminal 32, each of the movable contact portions 41, 42 corresponds to the corresponding fixed contact portion 33, 34). When the movable contact 40 is separated from the first fixed terminal 31 and the second fixed terminal 32, the movable contact portions 41 and 42 are separated from the corresponding fixed contact portions 33 and 34, respectively. Is not limited to this. For example, as shown in FIG. 9, the electromagnetic drive unit 60 is disposed outside the contact case 20 and on the contact direction side with respect to the contact case 20, and the movable contact units 41 and 42 are electromagnetic drive units of the movable contact 40. 60 (that is, when the movable contact 40 is separated from the first fixed terminal 31 and the second fixed terminal 32, the movable contact portions 41, 42 correspond to the corresponding fixed contact portions 33, 34). When the movable contact 40 approaches the first fixed terminal 31 and the second fixed terminal 32, the movable contact portions 41 and 42 are separated from the corresponding fixed contact portions 33 and 34, respectively. May be)

  In the electromagnetic relay 1 of FIG. 9, the flow of gas flowing from the inside of the closed space 24 to the outside of the closed space 24 when the through-hole 251 is opened by the lid portion 37 is shown by the dotted arrow A3 and the dotted line in FIG. This is indicated by an arrow A4.

  As described above, the electromagnetic drive unit 60 is arranged outside the contact case 20 and on the side of the contact case 20 in the opening direction, and the movable contact portions 41 and 42 are the electromagnetic drive unit 60 side of the movable contact 40. Not only the electromagnetic relay 1 disposed on the opposite side, but the electromagnetic drive unit 60 is disposed outside the contact case 20 and on the contact direction side with respect to the contact case 20, and the movable contact portions 41 and 42 are movable contacts. Even if it is the electromagnetic relay 1 arrange | positioned at the electromagnetic drive part 60 side of the element | child 40, this invention is applicable. For this reason, the electromagnetic relay 1 with a high design freedom is realizable.

  As mentioned above, although various embodiment in this invention was described in detail with reference to drawings, finally the various aspect of this invention is demonstrated.

The electromagnetic relay according to the first aspect of the present invention is:
A box-shaped contact case having a closed space provided inside, and a through hole communicating with the inside of the closed space and the outside of the closed space;
A pair of fixed terminals respectively fixed to the contact case electrically independently from each other and having a pair of fixed contact portions disposed in the closed space;
A pair of movable contact portions disposed in the closed space and opposed to the pair of fixed contact portions, respectively, and each of the pair of movable contact portions is in contact with the corresponding pair of fixed contact portions. And a movable contact disposed so as to be movable in an opening direction in which each of the pair of movable contact portions is separated from the corresponding pair of fixed contact portions,
A lid that is coupled to the movable contact and capable of opening and closing the through hole in conjunction with movement of the movable contact in the contact direction and the opening direction;
When the pair of movable contact portions are in contact with the pair of fixed contact portions, the lid portion interlocked with the movable contact opens the through hole, while the pair of movable contact portions Is configured to close the through hole when the lid is interlocked with the contact when the pair is in a separated state with respect to the pair of fixed contact portions.

  According to the electromagnetic relay of the first aspect, when each movable contact portion is in contact with the corresponding fixed contact portion, the lid portion interlocked with the movable contact opens the through hole of the contact case, When each movable contact portion is in the separated state separated from the corresponding fixed contact portion, the lid portion interlocked with the movable contact is configured to close the through hole of the contact case. Thereby, for example, when the ablation gas generation source is arranged inside the enclosed space, the generated ablation gas is stored inside the enclosed space, and an effective arc extinction using the ablation gas can be performed. .

  In the electromagnetic relay of the above aspect, when each movable contact portion comes into contact with the corresponding fixed contact portion, the lid portion interlocked with the movable contact opens the through hole of the contact case, and the gas inside the closed space Therefore, it is possible to suppress the swelling of the contact case due to the gas inside the closed space.

The electromagnetic relay of the second aspect of the present invention is
A resin ablation gas generation source disposed in the enclosed space,
The ablation gas generation source is configured to ablate by an arc generated when each of the pair of movable contact portions in contact with the corresponding pair of fixed contact portions is separated from the corresponding pair of fixed contact portions. Generate gas.

  According to the electromagnetic relay of the second aspect, by providing the ablation gas generation source disposed inside the enclosed space, it is possible to perform effective arc extinction using the ablation gas.

The electromagnetic relay of the third aspect of the present invention is
The movable contact is movable along the contact direction and the separation direction between a separation position that is in the separation state and a contact position that is in the contact state,
While the movable contact moves from the contact position to the opening position, the lid portion starts to close the through hole.

  According to the electromagnetic relay of the third aspect, the through hole can be opened and closed by the lid portion in accordance with the generation of the arc. For this reason, for example, when an ablation gas generation source is arranged inside the enclosed space, the ablation gas generated inside the enclosed space is effectively stored, and more effective arc extinction using the ablation gas is performed. It can be carried out.

The electromagnetic relay of the fourth aspect of the present invention is
The part which contacts the said contact case when the said through-hole in the said cover part is closed is comprised with the elastic member.

  According to the electromagnetic relay of the fourth aspect, when the lid portion closes the through hole, it is possible to reduce a collision sound generated when the lid portion collides with the contact case.

The electromagnetic relay of the fifth aspect of the present invention is
It extends along the contact direction and the opening direction from the outside of the contact case through the through hole to the closed space, and is connected to the movable contact in the closed space and is movable together with the movable contact. And a movable shaft to which the lid is connected;
An electromagnetic drive unit disposed outside the contact case and on the contact direction side of the contact case, and driving the movable shaft to move the movable contact in the contact direction or the separating direction;
The pair of movable contact portions are disposed on the electromagnetic drive portion side of the movable contact.

  According to the electromagnetic relay of the fifth aspect, an electromagnetic relay with a high degree of design freedom can be realized.

The electromagnetic relay of the sixth aspect of the present invention is
It extends along the contact direction and the opening direction from the outside of the contact case through the through hole to the closed space, and is connected to the movable contact in the closed space and is movable together with the movable contact. And a movable shaft to which the lid is connected;
An electromagnetic drive unit that is disposed outside the contact case and on the opening direction side of the contact case, and drives the movable shaft to move the movable contact in the contact direction or the opening direction;
The pair of movable contact portions are disposed on the opposite side of the movable contact from the electromagnetic drive portion side.

  According to the electromagnetic relay of the sixth aspect, an electromagnetic relay with a high degree of design freedom can be realized.

The electromagnetic relay of the seventh aspect of the present invention is
An urging portion for urging the lid portion in a direction to close the through hole is provided at an end portion of the movable shaft on the side close to the electromagnetic driving portion.

  According to the electromagnetic relay of the seventh aspect, since the lid portion more reliably closes the through hole of the contact case, the gas generated by the arc generated between each movable contact portion and the corresponding fixed contact portion is closed space. It is possible to store more reliably in the interior.

The electromagnetic relay of the eighth aspect of the present invention is
The lid portion is provided integrally with the movable shaft.

  According to the electromagnetic relay of the eighth aspect, the number of parts of the electromagnetic relay can be reduced and the manufacturing cost of the electromagnetic relay can be reduced.

  In addition, it can be made to show the effect which each has by combining arbitrary embodiment or modification of the said various embodiment or modification suitably. In addition, combinations of the embodiments, combinations of the examples, or combinations of the embodiments and examples are possible, and combinations of features in different embodiments or examples are also possible.

  The electromagnetic relay of the present invention can be applied to automobiles, for example.

DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 10 Housing 11 Case 111 Bottom wall part 12 Cover 121 Bottom wall part 13 Terminal hole 20 Contact case 21 Ceramic plate 22 Flange part 23 1st yoke 231 Through-hole 24 Closed space 25 Magnet holder 251 Through-hole 252 Protrusion part 31 1st 1 fixed terminal 32 2nd fixed terminal 33 1st fixed contact part 34 2nd fixed contact part 35 Movable shaft 352 Coil spring holding part 36 Coil spring 37 Cover part 371 Horizontal plate part 372 Vertical plate part 38 Opening part 40 Movable contact element 41 First movable contact portion 42 Second movable contact portion 51 First magnet portion 52 Second magnet portion 60 Electromagnetic drive portion 61 Electromagnet portion 611 Through hole 62 Spool 63 Coil 64 Second yoke 65 Movable iron piece 66 Fixed iron piece 661 Through hole 67 Return Spring 70 Member 80 Energizing portion CL Center line A1 to A4 Arrow P1 Separation position P2 Contact position P3 Medium Position

Claims (8)

A box-shaped contact case having a closed space provided inside, and a through hole communicating with the inside of the closed space and the outside of the closed space;
A pair of fixed terminals respectively fixed to the contact case electrically independently from each other and having a pair of fixed contact portions disposed in the closed space;
A pair of movable contact portions disposed in the closed space and opposed to the pair of fixed contact portions, respectively, and each of the pair of movable contact portions is in contact with the corresponding pair of fixed contact portions. And a movable contact disposed so as to be movable in an opening direction in which each of the pair of movable contact portions is separated from the corresponding pair of fixed contact portions,
A lid that is coupled to the movable contact and capable of opening and closing the through hole in conjunction with movement of the movable contact in the contact direction and the opening direction;
When the pair of movable contact portions are in contact with the pair of fixed contact portions, the lid portion interlocked with the movable contact opens the through hole, while the pair of movable contact portions The electromagnetic relay is configured such that the lid portion interlocked with the contactor closes the through-hole when in a disengaged state with respect to the pair of fixed contact portions. A resin ablation gas generation source disposed in the enclosed space,
The ablation gas generation source is configured to ablate by an arc generated when each of the pair of movable contact portions in contact with the corresponding pair of fixed contact portions is separated from the corresponding pair of fixed contact portions. The electromagnetic relay according to claim 1, wherein gas is generated. The movable contact is movable along the contact direction and the separation direction between a separation position that is in the separation state and a contact position that is in the contact state,
The electromagnetic relay according to claim 1 or 2, wherein the lid portion starts to close the through hole while the movable contact moves from the contact position to the open position.   4. The electromagnetic relay according to claim 1, wherein at least a portion of the lid that contacts the contact case when the through hole is closed is formed of an elastic member. It extends along the contact direction and the opening direction from the outside of the contact case through the through hole to the closed space, and is connected to the movable contact in the closed space and is movable together with the movable contact. And a movable shaft to which the lid is connected;
An electromagnetic drive unit disposed outside the contact case and on the contact direction side of the contact case, and driving the movable shaft to move the movable contact in the contact direction or the separating direction;
5. The electromagnetic relay according to claim 1, wherein the pair of movable contact portions are disposed on an electromagnetic drive unit side of the movable contact. It extends along the contact direction and the opening direction from the outside of the contact case through the through hole to the closed space, and is connected to the movable contact in the closed space and is movable together with the movable contact. And a movable shaft to which the lid is connected;
An electromagnetic drive unit that is disposed outside the contact case and on the opening direction side of the contact case, and drives the movable shaft to move the movable contact in the contact direction or the opening direction;
5. The electromagnetic relay according to claim 1, wherein the pair of movable contact portions are arranged on a side opposite to the electromagnetic drive portion side of the movable contact.   The electromagnetic relay according to claim 5 or 6, wherein an urging portion that urges the lid portion in a direction to close the through hole is provided at an end portion of the movable shaft that is closer to the electromagnetic drive portion.   The electromagnetic relay according to claim 5, wherein the lid is provided integrally with the movable shaft.

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