Electromagnetic relays

Abstract

To provide an electromagnetic relay capable of more reliably preventing the contact reliability of auxiliary contacts from declining even when the current flowing through a main contact is large.SOLUTION: An electromagnetic relay 1 includes: a housing 10 that has a base 110 and a case 120 placed on the base 110; and an electromagnetic unit 20 that has a coil 210 placed in the housing 10. The electromagnetic relay also includes a main contact part 40 that has a main fixed contact 411 placed in the housing 10 and a main moving contact 421 placed in the housing 10, which comes into contact with and separates from the main fixed contact 411 depending on turning on / off of the current flowing the coil 210; and an auxiliary contact 60 that has an auxiliary fixed contact 611 placed in the housing 10 and an auxiliary moving contact 621 placed in the housing 10, which comes into contact with and separates from the auxiliary fixed contact 611. The electromagnetic relay also includes partition wall 130 located in front of the auxiliary contact 60 and behind the main contact part 40.SELECTED DRAWING: Figure 14

Description

Technical Field

[0001] The present disclosure relates to an electromagnetic relay.

Background Art

[0002] Conventionally, as an electromagnetic relay, as disclosed in Patent Document 1 below, there is known one having a base and a case covering the base, and a housing in which an internal space is formed.

[0003] In this Patent Document 1, the electromagnetic relay includes a main contact portion having a main fixed contact and a main movable contact that makes contact with and separates from the main fixed contact, and an auxiliary contact portion having an auxiliary fixed contact and an auxiliary movable contact that makes contact with and separates from the auxiliary fixed contact. Further, the main contact portion and the auxiliary contact portion are disposed in the internal space formed in the housing. And by separating the main fixed contact and the main movable contact, it is possible to switch between conduction and non-conduction of the main fixed contact portion and the main movable contact portion. On the other hand, by separating the auxiliary fixed contact and the auxiliary movable contact, it is possible to switch between conduction and non-conduction of the auxiliary fixed contact portion and the auxiliary movable contact portion.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, as an electromagnetic relay having a main contact portion and an auxiliary contact portion, there is also an electromagnetic relay in which the current flowing through the main contact portion is larger than that of the electromagnetic relay disclosed in Patent Document 1 above.

[0006] And in an electromagnetic relay in which the current flowing through the main contact portion is large, it is highly possible that the auxiliary contact portion is affected by consumed powder or the like that scatters when the main contact portion makes contact or separates.

[0007] Therefore, in electromagnetic relays where a large current flows through the main contact, it is preferable to more reliably suppress the effects on the auxiliary contact from consumable dust and other debris scattered when the main contact makes and makes contact.

[0008] In other words, in an electromagnetic relay having a main contact portion and an auxiliary contact portion, it is preferable to more reliably suppress the deterioration of the contact reliability of the auxiliary contact portion even when the current flowing through the main contact portion is large.

[0009] Therefore, the present disclosure aims to provide an electromagnetic relay that can more reliably suppress the deterioration of contact reliability in the auxiliary contact portion, even when the current flowing through the main contact portion is large. [Means for solving the problem]

[0010] The electromagnetic relay according to this disclosure comprises a housing having a base and a case disposed above the base; an electromagnet device having a coil disposed within the housing; a main contact section having a main fixed contact disposed within the housing and a main movable contact disposed within the housing that moves in contact with and away from the main fixed contact in accordance with the switching on and off of the coil; an auxiliary contact section having an auxiliary fixed contact disposed within the housing and an auxiliary movable contact disposed within the housing that moves in contact with and away from the auxiliary fixed contact; and a partition wall located in front of the auxiliary contact section and rearward of the main contact section. [Effects of the Invention]

[0011] According to this disclosure, it is possible to obtain an electromagnetic relay that can more reliably suppress the deterioration of contact reliability at the auxiliary contact portion, even when the current flowing through the main contact portion is large. [Brief explanation of the drawing]

[0012] [Figure 1]This is a perspective view of the electromagnetic relay according to the first embodiment, viewed from one direction. [Figure 2] This is a perspective view of the electromagnetic relay according to the first embodiment, viewed from another direction. [Figure 3] This figure shows an electromagnetic relay according to the first embodiment, and is an exploded perspective view taken from one direction with the cover removed. [Figure 4] This is a diagram showing an electromagnetic relay according to the first embodiment, an exploded perspective view taken from another direction with the cover removed. [Figure 5] This is a plan view showing components other than the cover of the electromagnetic relay according to the first embodiment. [Figure 6] This is an exploded perspective view of the components of the electromagnetic relay according to the first embodiment, excluding the cover, as seen from one direction. [Figure 7] This is an exploded perspective view of the components of the electromagnetic relay according to the first embodiment, excluding the cover, as seen from a different direction. [Figure 8] This is an exploded perspective view of the electromagnet device included in the electromagnetic relay according to the first embodiment, viewed from one direction. [Figure 9] This is an exploded perspective view of the movable member, movable part, and main movable contact part of the electromagnetic relay according to the first embodiment, viewed from one direction. [Figure 10] This is an exploded perspective view of the movable member, movable part, and main movable contact part of the electromagnetic relay according to the first embodiment, viewed from another direction. [Figure 11] This is an exploded perspective view of the auxiliary contact portion of the electromagnetic relay according to the first embodiment, viewed from one direction. [Figure 12] This diagram shows the contact and separation of the main contact portion and the auxiliary contact portion according to the first embodiment, and is a perspective view showing the main contact portion and the auxiliary contact portion in the second position. [Figure 13] This diagram shows the contact and separation of the main contact portion and the auxiliary contact portion according to the first embodiment, and is a perspective view showing the main contact portion and the auxiliary contact portion in a first position. [Figure 14]A figure showing the contact separation of the main contact part and the auxiliary contact part according to the first embodiment, which is a vertical sectional view showing the state where the main contact part and the auxiliary contact part are in the second position. [Figure 15] A figure showing the contact separation of the main contact part and the auxiliary contact part according to the first embodiment, which is a vertical sectional view showing the state where the main contact part and the auxiliary contact part are in the first position. [Figure 16] A perspective view showing the inside of the cover according to the first embodiment. [Figure 17] A rear view showing the cover according to the first embodiment. [Figure 18] A figure showing the electromagnetic relay according to the first embodiment, which is a rear view showing the state where the electromagnetic relay is cut by a vertical plane extending in the left - right direction at the position where the auxiliary contact of the electromagnetic relay exists. [Figure 19] A figure showing the electromagnetic relay according to the first embodiment, which is a perspective view showing the state where the central part of the electromagnetic relay in the up - down direction is cut by a horizontal plane. [Figure 20] A perspective view showing an enlarged part of FIG. 19. [Figure 21] A figure showing the electromagnetic relay according to the first embodiment, which is a perspective view showing the state where the electromagnetic relay is cut by a vertical plane extending in the front - rear direction at the position where the third side wall of the electromagnetic relay exists. [Figure 22] A figure showing the electromagnetic relay according to the first embodiment, which is a perspective view showing the state where the electromagnetic relay is cut by a vertical plane extending in the left - right direction at the position where the pressing wall of the electromagnetic relay exists. [[ID=2​​​​​​​​​​​ [Figure 27] This is a perspective view of the base according to the second embodiment, seen from another direction. [Figure 28] This is a perspective view showing the inside of the cover according to the second embodiment. [Figure 29] This is a rear view showing the cover according to the second embodiment. [Figure 30] This figure shows an electromagnetic relay according to a second embodiment, and is a rear view showing the electromagnetic relay in a state where the position where the auxiliary contacts are located is cut by a vertical plane extending in the left-right direction. [Figure 31] This figure shows an electromagnetic relay according to a second embodiment, and is a perspective view showing the electromagnetic relay cut across its central vertical portion by a horizontal plane. [Figure 32] This figure shows an electromagnetic relay according to a second embodiment, and is a perspective view showing the position where the auxiliary drive unit of the electromagnetic relay is located, cut across by a horizontal plane. [Figure 33] This figure shows an electromagnetic relay according to a second embodiment, and is a perspective view showing the state in which the position where the extended portion of the second side wall of the electromagnetic relay exists is cut by a vertical plane extending in the front-rear direction. [Figure 34] This is an exploded perspective view of the electromagnetic relay according to the third embodiment, with the cover removed, viewed from one direction. [Figure 35] This is an exploded perspective view of the electromagnetic relay according to the third embodiment, with the cover removed, viewed from another direction. [Figure 36] This is a perspective view of the base according to the third embodiment, taken from one direction. [Figure 37] This is a perspective view of the base according to the third embodiment, seen from another direction. [Figure 38] This is a perspective view showing the inside of the cover according to the third embodiment. [Figure 39] This is a rear view showing the cover according to the third embodiment. [Figure 40] This figure shows an electromagnetic relay according to the third embodiment, and is a rear view showing the electromagnetic relay in a state where the position where the auxiliary contacts are located is cut by a vertical plane extending in the left-right direction. [Figure 41]This figure shows an electromagnetic relay according to the third embodiment, and is a perspective view showing the electromagnetic relay cut across its central vertical portion by a horizontal plane. [Figure 42] This is a plan view of Figure 41. [Figure 43] This figure shows an electromagnetic relay according to a third embodiment, and is a perspective view showing the state in which the position where the extended portion of the second side wall of the electromagnetic relay exists is cut by a vertical plane extending in the front-rear direction. [Figure 44] This is a side view of Figure 43. [Modes for carrying out the invention]

[0013] Embodiments of this disclosure will be described in detail below with reference to the drawings. In the following description, the vertical direction will be described as the Z direction (axial direction) when the base is positioned below the case and the coil is arranged so that its axial direction extends vertically. Specifically, the vertical direction will be described as the Z direction (axial direction) when the base is positioned below the case with the base portion extending along the horizontal plane and the coil is arranged so that its axial direction extends vertically.

[0014] Furthermore, the direction intersecting the Z direction (axial direction) will be described as the X direction (first direction: front-to-back direction: the direction in which the main fixed contact and the main movable contact face each other).The direction intersecting the X and Z directions will be described as the Y direction (second direction: width direction: longitudinal direction of the movable contact).Specifically, the Z direction is perpendicular to the X direction, and the Y direction is perpendicular to both the X and Z directions.

[0015] Furthermore, with the base positioned below the case, the upper and lower directions are defined, and the side where the main fixed contact is located is defined as the front in the front-to-back direction, and the side where the main movable contact is located is defined as the rear in the front-to-back direction.

[0016] Note that the following embodiments include similar components. Therefore, in the following, these similar components will be given the same reference numerals, and redundant explanations will be omitted.

[0017] (First Embodiment) As shown in Figures 1 and 2, the electromagnetic relay 1 according to this embodiment includes a housing 10 formed in the shape of a hollow box from a resin material. In this embodiment, the housing 10 has a base 110 and a case 120 that covers the base 110, and has an outer surface that is substantially rectangular in shape. Furthermore, when the case 120 is attached to the base 110, an internal space S1 is formed inside the housing 10. Note that the shape of the outer surface of the case 10 is not limited to a rectangular parallelepiped shape, and may be any shape.

[0018] Furthermore, an electromagnet device (drive unit) 20 is positioned at the rear in the X direction (front-to-back direction: first direction) within the internal space S1 of the housing 10, and a main contact portion 40 is positioned at the front in the X direction (front-to-back direction: first direction). In addition, an auxiliary contact portion 60 is positioned at the rear in the X direction (front-to-back direction: first direction) and above in the Z direction (up-down direction: axial direction) within the internal space S1 of the housing 10.

[0019] In this embodiment, the main contact portion 40 is a so-called normally closed contact portion that is initially on, and the auxiliary contact portion 60 is a so-called normally open contact portion that is initially off. It is also possible to make the main contact portion 40 a so-called normally open contact portion that is initially off, and the auxiliary contact portion 60 a so-called normally closed contact portion that is initially on.

[0020] The base 110 comprises a roughly rectangular plate-shaped base portion 111 extending along a roughly horizontal plane (a direction intersecting the Z direction: the XY plane), and a peripheral wall 112 connected to the periphery of the base portion 111 and extending in the Z direction (vertical direction) (see Figures 3 to 7).

[0021] A stepped portion is formed at the upper end of the opening of the peripheral wall 112, making its outer circumference smaller than that of the lower end. A pair of protrusions 112a are arranged side by side in the left-right direction on the front and rear surfaces of the peripheral wall 112, above the stepped portion.

[0022] On the other hand, case 120 has a roughly box-like shape that opens downwards, and this case 120 is attached to base 110 from above.

[0023] Case 120 comprises a roughly rectangular plate-shaped top wall 121 extending along a roughly horizontal plane (a direction intersecting the Z direction: the XY plane), and a peripheral wall 122 extending downward in the Z direction (vertical direction) from the periphery of the top wall 121 (see Figures 3 to 5).

[0024] The perimeter wall 122 comprises a front wall 1221 located in the front direction (front-to-back direction) and extending in the Y direction (width direction) and Z direction (up-down direction), and a rear wall 1222 located in the rear direction (front-to-back direction) and extending in the Y direction (width direction) and Z direction (up-down direction). The perimeter wall 122 also comprises a pair of side walls 1223 connected to the front wall 1221 and the rear wall 1222 on both sides in the Y direction (width direction) and extending in the X direction (front-to-back direction) and Z direction (up-down direction).

[0025] Furthermore, at the lower part of the front wall 1221 and the rear wall 1222, a pair of insertion holes 122a are provided side by side in the left-right direction, into which the projection 112a of the base 110 is inserted when the case 120 is attached to the base 110.

[0026] In this embodiment, the base 110 is provided with a first side wall 131 that extends upward from the bottom surface 111a of the base portion 111 and extends in the Y direction (width direction). Furthermore, the base 110 is provided with a pair of second side walls 132 that are connected to both ends of the first side wall 131 in the Y direction (width direction) and extend towards the rear in the X direction (front-to-back direction). This pair of second side walls 132 also extends upward from the bottom surface 111a of the base portion 111. The yoke 240 of the electromagnet device 20 is held by the first side wall 131 and the pair of second side walls 132 that extend upward from the bottom surface 111a of the base portion 111, and three sides (at least a part) of the side surface 210a of the coil 210 are enclosed.

[0027] Thus, in this embodiment, the electromagnet device 20 is positioned behind the first side wall 131. The main contact portion 40 is positioned in front of the first side wall 131 (see Figures 2 to 4). In other words, in this embodiment, the electromagnet device 20 and the main contact portion 40 are arranged within the internal space S1, separated by the first side wall 131 in the X direction (front-to-back direction).

[0028] Furthermore, a partition wall 113 is formed in front of the first side wall 131 of the base 110, and this partition wall 113 ensures the creepage distance between the pair of fixed contact portions 310, 310, which will be described later.

[0029] Furthermore, the base 110 has a riser member 114 formed therein to create a gap between the base 110 and the printed circuit board when the electromagnetic relay 1 is placed on a printed circuit board (not shown).

[0030] The electromagnet device (drive unit) 20 is a device that generates electromagnetic force and includes a coil 210 that generates magnetic flux when energized, and a hollow cylindrical coil bobbin 220 around which the coil 210 is wound (see Figure 8).

[0031] For example, a wire can be used as the coil 210. In this embodiment, the coil 210 is positioned in the internal space S1 of the housing 10 such that its axial direction extends in the Z direction (vertical direction), with the base 110 positioned below the case 120.

[0032] Furthermore, the coil bobbin 220 is made of resin, which is an insulating material, and a cylindrical portion 221 extending in the Z direction (vertical direction: axial direction of the coil) is formed in the center of the coil bobbin 220. Inside this cylindrical portion 221, a through hole 2211 is formed that penetrates in the Z direction (vertical direction: axial direction of the coil).

[0033] Furthermore, the coil bobbin 220 is connected to the upper end of the cylindrical portion 221 around which the coil 210 is wound, and has a substantially rectangular upper flange portion 222 that protrudes radially outward from the cylindrical portion 221. The coil bobbin 220 is also connected to the lower end of the cylindrical portion 221, and has a substantially rectangular lower flange portion 223 that protrudes radially outward from the cylindrical portion 221.

[0034] Furthermore, in this embodiment, an upper auxiliary contact holding portion 2221 is formed on the upper flange portion 222 to hold the auxiliary contact portion 60. This upper auxiliary contact holding portion 2221 is formed at both ends in the Y direction (width direction) of the rear end in the X direction (front-rear direction) of the upper flange portion 222. In addition, each upper auxiliary contact holding portion 2221 has a press-fit opening 2221a that opens outward in the Y direction (width direction), into which the press-fit pieces 6141a and 6251a of the auxiliary contact portion 60, described later, are press-fitted (see Figures 6 to 8). Then, a regulating wall 2221b is formed around the press-fit opening 2221a of the upper auxiliary contact holding portion 2221 to restrict the dislodgement and rotation of the press-fit pieces 6141a and 6251a (see Figures 6 to 8).

[0035] On the other hand, the lower flange portion 223 has a lower auxiliary contact holding portion 2231 formed therein to hold the auxiliary contact portion 60. In this embodiment, the lower flange portion 223 is formed such that the rear end in the X direction (front-rear direction) is wider than the front end, and the lower auxiliary contact holding portions 2231 are formed at both ends in the Y direction (width direction) of the front end of this wider portion. In addition, each lower auxiliary contact holding portion 2231 has a press-fit opening 2231a that opens outward in the Y direction (width direction), into which the press-fit pieces 6143a and 6253a of the auxiliary contact portion 60, which will be described later, are press-fitted (see Figures 6 to 8). Furthermore, a regulating wall 2231b is formed around the press-fit opening 2231a in the lower auxiliary contact holding portion 2231 to restrict the dislodgement and rotation of the press-fit pieces 6143a and 6253a (see Figures 6 to 8).

[0036] Furthermore, the electromagnet device 20 includes an iron core 230 that is inserted into a through hole 2211 formed in the cylindrical portion 221 of the coil bobbin 220 and is magnetized (through which magnetic flux passes) by the energized coil 210. The iron core 230 is positioned inside the coil 210.

[0037] The iron core 230 comprises a substantially cylindrical shaft portion 231 extending in the Z direction (vertical direction), and a substantially cylindrical head portion 232 formed to have a larger diameter than the shaft portion 231 and connected to the upper end of the shaft portion 231 (see Figure 8).

[0038] Furthermore, the electromagnet device 20 includes a yoke 240 positioned around the coil 210 wound around the cylindrical portion 221. In this embodiment, the yoke 240 is a substantially plate-shaped member made of a magnetic material, and has a substantially L-shape when viewed from the side (along the Y direction). That is, the yoke 240 includes a vertical wall portion (upright portion) 241 positioned to extend along a substantially vertical plane in front of the coil 210 wound around the cylindrical portion 221, and a horizontal wall portion 242 extending backward from the lower end of the vertical wall portion 241 (see Figure 8). Such a yoke 240 can be formed, for example, by bending a single plate.

[0039] As described above, the yoke 240 is supported by a first side wall 131 and a pair of second side walls 132 that extend upward from the bottom surface 111a of the base portion 111 (see Figures 3 and 4). A pair of projections (extensions) 2411 that protrude upward are formed at both ends of the vertical wall portion (upright portion) 2411 of the yoke 240 in the Y direction (width direction), and the axle 310 is positioned between the pair of projections (extensions) 2411.

[0040] Furthermore, the electromagnet device 20 is equipped with a pair of coil terminals 250 to which both ends of the coil 210 are connected, and the electromagnet device 20 is driven by energizing the coil 210 through this pair of coil terminals 250.

[0041] The movable member 30 is moved by switching the drive state of the electromagnet device 20.

[0042] In this embodiment, the movable member 30 includes an axle 310 positioned to face the head 232 of the iron core 230 in the vertical direction (Z direction), and a hinge spring 320 attached across the axle 310 and the yoke 240.

[0043] The axle 310 is made of a conductive metal and is positioned to swing vertically (in the Z direction) relative to the head 232 of the iron core 230 in response to the excitation and de-excitation of the coil 210.

[0044] In this embodiment, the armature 310 comprises a horizontal wall portion 311 that faces the head portion 232 of the iron core 230 in the vertical direction (Z direction), and a vertical wall portion 312 that extends downward from the front end of the horizontal wall portion 311 in the X direction (front-back direction) (see Figures 9 and 10).

[0045] Furthermore, the horizontal wall portion 311 of the axle 310 is attached to the upper end of the vertical wall portion 241 so as to be able to swing in the vertical direction (Z direction), allowing the axle 310 to rotate in the Z direction (vertical direction) around the part supported by the yoke 240.

[0046] Specifically, notches 3111 are formed at both ends in the Y direction (width direction) of the front end in the X direction (front-to-back direction) of the horizontal wall portion 311. By inserting the protruding portion (extension portion) 2411 of the yoke 240 into these notches 3111, the axle 310 is supported by the yoke 240. Thus, in this embodiment, the notches 3111 are the parts of the axle 310 that are supported by the yoke 240.

[0047] Furthermore, in this embodiment, a through hole 313 is formed at the front end of the abutment 310 in the X direction (front-to-back direction), extending through in the Z direction (up-down direction). The hinge spring 320 is inserted into this through hole 313 and attached across the abutment 310 and the yoke 240. At this time, the abutment 310 is biased by the hinge spring 320 so that the horizontal wall portion 311 moves away from the head 232 of the iron core 230.

[0048] When current is supplied to the coil 210, the axle 320 is rotated so that the horizontal wall portion 311 approaches the head portion 232 of the iron core 230. Specifically, by supplying current to the coil 210, the horizontal wall portion 311 of the axle 310 is attracted to the head portion 232 of the iron core 230, causing the axle 310 to rotate so that the horizontal wall portion 311 approaches the head portion 232 of the iron core 230. In other words, by supplying current to the coil 210 via the pair of coil terminals 250, the horizontal wall portion 311 of the axle 310 is rotated downward in the Z direction (up and down direction). At this time, the vertical wall portion 312 connected to the horizontal wall portion 311 rotates forward in the X direction (front and back direction).

[0049] The oscillation range of the armature 310 is set between the position where the horizontal wall portion 311 is furthest from the head portion 232 of the iron core 230 and the position where the horizontal wall portion 311 is closest to the head portion 232 of the iron core 230.

[0050] In this embodiment, the oscillation range of the axle 310 is set between an initial position in which the horizontal wall portion 311 is positioned a predetermined gap above the head portion 232 of the iron core 230, and a contact position in which the horizontal wall portion 311 contacts the head portion 232 of the iron core 230.

[0051] Therefore, in this embodiment, when current is supplied to the coil 210, the abutment 310 moves to a contact position where the horizontal wall portion 311 contacts the head portion 232 of the iron core 230, and when the current to the coil 210 is stopped, it returns to its initial position due to the biasing force of the hinge spring 320.

[0052] Thus, in this embodiment, the axle 310 is positioned opposite the head 232 of the iron core 230 with a predetermined gap when the coil 210 is not energized, and when the coil 210 is energized, it swings so as to be attracted to the head 232 side of the iron core 230.

[0053] Then, by switching the drive state of the electromagnet device 20 and oscillating the axle 310, it is possible to switch between conductivity and non-conductivity between the main fixed contact portion 410 and the main movable contact portion 420, which are paired with each other (having main contacts that move toward and away from each other).

[0054] In this embodiment, a main contact section 40 is provided in front of the electromagnet device 20, which opens and closes the main contact in accordance with the on / off state of the coil 210.

[0055] The main contact section 40 comprises a main fixed contact section 410 and a main movable contact section 420. The main fixed contact section 410 comprises a main fixed contact 411 and a main body section 412 having the main fixed contact 411. On the other hand, the main movable contact section 420 comprises a main movable contact 421 that moves relative to the main fixed contact 411 and can move toward and away from the main fixed contact 411, and a movable contact 422 having the main movable contact 421.

[0056] Furthermore, in this embodiment, the main contact portion 40 is provided with only one set of main fixed contact portion 410 and main movable contact portion 420 that are paired with each other (having main contacts that move toward and away from each other) (see Figures 6 and 7).

[0057] In this embodiment, the set of main fixed contact portion 410 and main movable contact portion 420 having main contacts that move toward and away from each other is composed of a pair of main fixed contact portions 410 and one main movable contact portion 420.

[0058] Specifically, two main fixed contact portions 410, which have a shape symmetrical with respect to the XZ plane, are made up of a pair of main fixed contact portions 410. The two pair of main fixed contact portions 410 are fixed to the base 110 (housing 10) with a spacing in the Y direction (width direction: axial direction and direction intersecting the first direction: second direction).

[0059] Each main fixed contact portion 410 includes a main body portion 412 having one main fixed contact 411 (see Figures 6 and 7). In this embodiment, the main body portion 412 is made to have the main fixed contact 411 by inserting a member intended to be the main fixed contact into an insertion hole 412a formed in the main body portion 412 so as to penetrate in the thickness direction of the plate, and then riveting it (see Figures 14 and 15). Thus, in this embodiment, the main body portion 412 functions as a fixed-side main contact holder that holds the main fixed contact 411.

[0060] Furthermore, the formation of the main fixed contact 411 on the main body 412 does not need to be done by riveting, and can be done by various methods. For example, it is possible to make a protruding portion of the main body 412 function as the main fixed contact by applying a dowel to the main body 412. Alternatively, by configuring the main movable contact 421 to come into contact with a part of the flat surface of the main body 412, it is also possible to make a part of the flat surface of the main body 412 function as the main fixed contact.

[0061] Furthermore, the main fixed contact portion 410 is connected to the lower end of the main body portion 412 and includes a terminal portion 413 that is fixed to the base 110 (housing 10) with its tip (connecting portion) protruding outward (downward) from the base 110 (housing 10).

[0062] In this embodiment, the base 110 has an insertion hole 115 that penetrates in the Z direction (vertical direction). The tip (connection part: lower end) of the terminal part 413 is inserted into this insertion hole 115 from above. In this way, the main fixed contact part 410 is fixed to the base 110 (housing 10) with the tip (connection part: lower end) of the terminal part 413 protruding outward (downward) from the base 110 (see Figures 14 and 15). The main fixed contact part 410 is fixed to the base 110 (housing 10) with adhesive or the like.

[0063] In this configuration, the main fixed contact portion 410 is fixed to the base 110 (housing 10) with the main fixed contact 411 facing backward in the X direction (front-to-back direction). That is, the main fixed contact portion 410 is fixed to the base 110 (housing 10) with the side of the main fixed contact 411 of the main body portion 412 (rear surface: the surface facing the main movable contact 421) facing backward.

[0064] The main fixed contact 411, the main body portion 412, and the terminal portion 413 can be formed from conductive materials such as silver-based materials or copper-based materials.

[0065] Thus, in this embodiment, the two main fixed contacts 411 are arranged side by side in the Y direction, which is the direction perpendicular (intersecting) to the direction in which the main fixed contacts 411 and the main movable contact 422 move relative to each other. One of the two main body parts 412 has one main fixed contact 411, and the other main body part has the other main fixed contact 411.

[0066] On the other hand, one main movable contact section 420 is equipped with one movable contact 422, and this movable contact 422 has a pair of main movable contacts 421 arranged side by side in the Y direction (width direction) (see Figures 9 and 10).

[0067] In this embodiment, a member intended to become the main movable contact is inserted into through holes 422a formed on both sides of the longitudinal direction of the substantially rectangular plate-shaped movable contact 422, penetrating in the thickness direction, and riveted in place. In this way, the main movable contact 422 has the main movable contact 421 (see Figures 14 and 15). Thus, in this embodiment, the movable contact 422 functions as a movable-side main contact holder that holds the main movable contact 421.

[0068] Furthermore, the formation of the main movable contact 421 on the movable contact 422 does not need to be done by riveting, and can be done by various methods. For example, it is possible to make the protruding portion of the movable contact 422 function as the main movable contact by applying a dowel to it. Alternatively, by configuring the movable contact 422 so that a part of its flat surface comes into contact with the main fixed contact 411, it is also possible to make a part of the flat surface of the movable contact 422 function as the main movable contact.

[0069] Furthermore, one main movable contact portion 420 is positioned so as to be located behind the pair of main fixed contact portions 410 in the X direction (front-to-back direction), with its plate thickness direction substantially aligned with the X direction (front-to-back direction) and its longitudinal direction substantially aligned with the Y direction (width direction). At this time, the main movable contact portion 420 is positioned so that its main movable contact 421 faces the main fixed contact 411 in the X direction (front-to-back direction). Specifically, the movable contact 422 is positioned so that its main movable contact 421, formed on one side in the Y direction (width direction), faces the main fixed contact 411 of the main fixed contact portion 410 located on the same side in the Y direction (width direction) in the X direction (front-to-back direction). Similarly, the movable contact 422 is positioned so that its main movable contact 421, formed on the other side in the Y direction (width direction), faces the main fixed contact 411 of the main fixed contact portion 410 located on the other side in the Y direction (width direction) in the X direction (front-to-back direction). In this way, one main movable contact 421 makes contact with and separates from one of the two main fixed contacts 411, and the other main movable contact 421 makes contact with and separates from the other main fixed contact 411. In addition, one movable contact 422 has two main movable contacts 421.

[0070] Furthermore, the main movable contact 421 and the movable contact 422 can also be formed from conductive materials such as silver-based materials or copper-based materials.

[0071] A set consisting of a pair of main fixed contact parts 410 and one main movable contact part 420, configured in this way, is housed in front of the first side wall 131 in the X direction (front-back direction: first direction) within the internal space S1 (see Figures 12 to 15).

[0072] Here, the main movable contact portion 420 is arranged to swing relative to the pair of main fixed contact portions 410 in the X direction (front-back direction).

[0073] In this embodiment, the main contact portion 40 is connected to the axle 310 via the movable portion 50. By causing the movable portion 50 to swing in the X direction (front-back direction) in conjunction with the swinging of the axle 310, the main movable contact portion 420 is made to swing in the X direction (front-back direction) in conjunction with the operation of the movable portion 50. In other words, by holding the main movable contact portion 420 in the movable portion 50, the main movable contact portion 420 is made to swing relative to the pair of main fixed contact portions 410 in the X direction (front-back direction).

[0074] In this embodiment, the movable part 50 is made of an insulating resin material and includes a holder part 51 with an insertion hole 511 formed at its upper part into which the vertical wall portion 312 of the axle 310 is inserted and held. The movable part 50 also includes a movable plate 52 connected to the lower part of the holder part 51 and a movable spring 53 connecting the movable plate 52 and the movable contact 422.

[0075] In this embodiment, a through hole 521 is formed in the upper part of the movable plate 52 in the Z direction (vertical direction), extending through in the thickness direction. With the upper end of the movable plate 52 inserted into an insertion hole (not shown) formed in the lower end of the holder portion 51, the movable plate 52 is held in place by the holder portion 51 by inserting a projection formed in the insertion hole (not shown) of the holder portion 51 into the through hole 521.

[0076] Furthermore, a projection 522 is formed in the center of the movable plate 52 in the Z direction (vertical direction), projecting backward, and an upper through-hole 531 is formed in the upper part of the movable spring 53 in the Z direction (vertical direction), penetrating in the thickness direction. By inserting the projection 522 of the movable plate 52 into the upper through-hole 531 of the movable spring 53, the movable spring 53 is held in place by the movable plate 52.

[0077] Furthermore, a lower through-hole 532 is formed in the lower part of the movable spring 53 in the Z direction (vertical direction), penetrating in the plate thickness direction, and a projection 422b is formed in the central part of the movable contact 422 in the Y direction (width direction), projecting backward. By inserting the projection 422b of the movable contact 422 into the lower through-hole 532 of the movable spring 53, the movable contact 422 is held in place by the movable spring 53.

[0078] In this way, the main contact portion 40 is connected to the axle 310 via the movable portion 50.

[0079] With this configuration, the main movable contact portion 420 swings relative to the pair of main fixed contact portions 410 in the X direction (front-back direction) as the axle 310 swings. As a result, the main movable contact portion 421 swings in an arc centered on the upper end of the vertical wall portion 312.

[0080] Furthermore, in this embodiment, an auxiliary contact section 60 is arranged within the internal space S1 of the housing 10, separate from the main contact section 40. This auxiliary contact section 60 is arranged within the internal space S1 such that the auxiliary contacts (auxiliary fixed contact 611 and auxiliary movable contact 621) are located at the rear in the X direction (front-rear direction) and on the upper end side of the coil 210.

[0081] The auxiliary contact section 60 comprises an auxiliary fixed contact section 610 and an auxiliary movable contact section 620. The auxiliary fixed contact section 610 includes an auxiliary fixed contact 611 and a terminal section 612 having the auxiliary fixed contact 611. On the other hand, the auxiliary movable contact section 620 includes an auxiliary movable contact 621 that moves relative to the auxiliary fixed contact 611 and can move toward and away from the auxiliary fixed contact 611, an auxiliary movable terminal section 622 having the auxiliary movable contact 621, and a terminal section 623 connected to the auxiliary movable terminal section 622. The movable member of the auxiliary movable terminal section 622 is made of a leaf spring.

[0082] Furthermore, in this embodiment, the auxiliary contact portion 60 comprises only one set of auxiliary fixed contact portion 610 and auxiliary movable contact portion 620 that are paired with each other (having auxiliary contacts that move toward and away from each other) (see Figures 6 and 7).

[0083] In this embodiment, the set of auxiliary fixed contact portion 610 and auxiliary movable contact portion 620, which have auxiliary contacts that move toward and toward each other, consists of one auxiliary fixed contact portion 610 and one auxiliary movable contact portion 620. One auxiliary fixed contact portion 610 has one auxiliary fixed contact 611 formed thereon, and one auxiliary movable contact portion 620 has only one auxiliary movable contact 621 that moves toward and away from the one auxiliary fixed contact 611.

[0084] In this embodiment, as described above, the auxiliary fixed contact portion 610 includes a terminal portion 612 having one auxiliary fixed contact 611, and this terminal portion 612 has a horizontal piece 613 that extends horizontally and is elongated in the Y direction (width direction). The auxiliary fixed contact 611 is formed on this horizontal piece 613. In this embodiment, the horizontal piece 613 is made to have the auxiliary fixed contact 611 by inserting a member intended to be an auxiliary fixed contact into an insertion hole 613a formed in the horizontal piece 613 so as to penetrate in the thickness direction and riveting it (see Figure 11). Thus, in this embodiment, the horizontal piece 613 functions as a fixed-side auxiliary contact holder that holds the auxiliary fixed contact 611.

[0085] Furthermore, the formation of the auxiliary fixing contacts 611 on the horizontal piece 613 does not necessarily have to be done by riveting, and can be done by various methods. For example, it is possible to make a protruding portion of the horizontal piece 613 function as an auxiliary fixing contact by applying a dowel to it. Alternatively, by configuring the auxiliary fixing contacts 611 to come into contact with a part of the flat surface of the horizontal piece 613, it is also possible to make a part of the flat surface of the horizontal piece 613 function as an auxiliary fixing contact. In addition, multiple auxiliary fixing contacts 611 may be provided on the horizontal piece 613 (terminal portion 612).

[0086] Furthermore, the terminal portion 612 is connected to the outer end of the horizontal piece 613 in the Y direction (width direction), extends along the XZ plane, and has an elongated side piece portion 614 in the Z direction (vertical direction).

[0087] In this embodiment, the side piece 614 comprises a first side piece 6141 connected to the outer end of the horizontal piece 613 in the Y direction (width direction), and a connecting piece 6142 extending forward in the X direction (front-to-back direction) from the lower end of the first side piece 6141. Furthermore, the side piece 614 comprises a second side piece 6143 extending downward in the Z direction (up-down direction) from the lower front end of the connecting piece 6142. Thus, in this embodiment, the side piece 614 has a crank-shaped form when viewed from the Y direction (width direction).

[0088] In this embodiment, the auxiliary fixed contact portion 610 is held by the coil bobbin 220.

[0089] Specifically, press-fit pieces 6141a are provided at both ends of the first side piece 6141 in the X direction (front-to-back direction), projecting inward in the Y direction (width direction). The pair of press-fit pieces 6141a are then press-fitted into a pair of press-fit openings 2221a of the upper auxiliary contact holding portion 2221 formed in the upper flange portion 222.

[0090] Furthermore, a press-fit piece 6143a is provided at the lower end of the front end in the X direction (front-to-back direction) of the second side piece 6143, projecting inward in the Y direction (width direction). This press-fit piece 6143a is then press-fitted into the press-fit opening 2231a of the lower auxiliary contact holding portion 2231 formed in the lower flange portion 223.

[0091] In this way, the auxiliary fixed contact portion 610 is held in place by the coil bobbin 220 by pressing the pair of press-fit pieces 6141a into the pair of press-fit openings 2221a and pressing the press-fit piece 6143a into the press-fit opening 2231a.

[0092] Furthermore, the auxiliary fixed contact portion 610 includes a connecting portion 615 that extends downward from the lower end of the second side piece portion 6143. This connecting portion 615 is formed to protrude outward (downward) from the base 110 while the side piece portion 614 is held by the coil bobbin 220 placed on the base 110.

[0093] In this embodiment, the auxiliary fixed contact portion 610 is held on the coil bobbin 220 with the auxiliary fixed contact 611 facing downward in the Z direction (vertical direction). That is, the auxiliary fixed contact portion 610 is held on the coil bobbin 220 with the side of the horizontal piece 613 on which the auxiliary fixed contact 611 is formed (the lower surface: the surface facing the auxiliary movable contact 621) facing downward.

[0094] Furthermore, the auxiliary fixed contact 611, terminal portion 612, and connecting portion 615 can be formed from conductive materials such as silver-based materials or copper-based materials.

[0095] On the other hand, the auxiliary movable contact portion 620 is equipped with an auxiliary movable terminal portion 622, which is made of a leaf spring that extends horizontally and is elongated in the Y direction (width direction). This auxiliary movable terminal portion 622 has an auxiliary movable contact 621.

[0096] In this embodiment, the auxiliary movable terminal portion 622 is bent in a crank shape so that its tip (the inner end in the Y direction) is located downwards. A member intended to be an auxiliary movable contact is inserted into an insertion hole 622a formed in the tip of the auxiliary movable terminal portion 622 so as to penetrate in the thickness direction of the plate, and riveted together, thereby giving the auxiliary movable terminal portion 622 an auxiliary movable contact 621 (see Figure 11). Thus, in this embodiment, the auxiliary movable terminal portion 622 functions as a movable auxiliary contact holder that holds the auxiliary movable contact 621.

[0097] Furthermore, the formation of the auxiliary movable contact 621 on the auxiliary movable terminal portion 622 does not need to be done by riveting, and can be done by various methods. For example, it is possible to make the protruding portion of the auxiliary movable terminal portion 622 function as an auxiliary movable contact by applying a dowel to the auxiliary movable terminal portion 622. Alternatively, by configuring the auxiliary movable contact 621 to come into contact with a part of the flat surface of the auxiliary movable terminal portion 622, it is also possible to make a part of the flat surface of the auxiliary movable terminal portion 622 function as an auxiliary movable contact. In addition, multiple auxiliary movable contacts 621 may be provided on the auxiliary movable terminal portion 622.

[0098] Furthermore, a terminal portion 623 is attached to the outer end of the auxiliary movable terminal portion 622 in the Y direction (width direction). This terminal portion 623 extends horizontally and has a horizontal piece 624 that is elongated in the Y direction (width direction), and the auxiliary movable terminal portion 622 is attached to this horizontal piece 624. Specifically, a pair of through holes 622b are formed at the outer end of the auxiliary movable terminal portion 622 in the Y direction (width direction) so as to be aligned in the X direction (front-to-back direction), and a pair of protrusions 624a are formed on the horizontal piece 624 so as to be aligned in the X direction (front-to-back direction). The auxiliary movable terminal portion 622 is attached to the horizontal piece 624 by riveting with the pair of protrusions 624a inserted into the pair of through holes 622b.

[0099] Furthermore, the terminal portion 623 is connected to the outer end of the horizontal piece 624 in the Y direction (width direction), extends along the XZ plane, and has an elongated side piece portion 625 in the Z direction (vertical direction).

[0100] In this embodiment, the side piece 625 comprises a first side piece 6251 connected to the outer end of the horizontal piece 624 in the Y direction (width direction), and a connecting piece 6252 extending forward in the X direction (front-to-back direction) from the lower end of the first side piece 6251. Furthermore, the side piece 625 comprises a second side piece 6253 extending downward in the Z direction (up-down direction) from the lower front end of the connecting piece 6252. Thus, in this embodiment, the side piece 625 also has a crank-shaped form when viewed from the Y direction (width direction).

[0101] Furthermore, in this embodiment, the auxiliary movable contact portion 620 is held by the coil bobbin 220.

[0102] Specifically, press-fit pieces 6251a are provided at both ends of the first side piece 6251 in the X direction (front-to-back direction), projecting inward in the Y direction (width direction). The pair of press-fit pieces 6251a are then press-fitted into the pair of press-fit openings 2221a of the upper auxiliary contact holding portion 2221 formed in the upper flange portion 222.

[0103] Furthermore, a press-fit piece 6253a is provided at the lower end of the front end in the X direction (front-to-back direction) of the second side piece 6253, projecting inward in the Y direction (width direction). This press-fit piece 6253a is then press-fitted into the press-fit opening 2231a of the lower auxiliary contact holding portion 2231 formed in the lower flange portion 223.

[0104] In this way, the auxiliary movable contact portion 620 is held in place by the coil bobbin 220 by pressing the pair of press-fit pieces 6251a into the pair of press-fit openings 2221a and pressing the press-fit piece 6253a into the press-fit opening 2231a.

[0105] Furthermore, the auxiliary movable contact portion 620 includes a connecting portion 626 that extends downward from the lower end of the second side piece portion 6253. This connecting portion 626 is formed to protrude outward (downward) from the base 110 while the side piece portion 625 is held by the coil bobbin 220 placed on the base 110.

[0106] In this embodiment, the auxiliary movable contact portion 620 is held on the coil bobbin 220 with the auxiliary movable contact 621 facing upward in the Z direction (vertical direction). That is, the auxiliary movable contact portion 620 is held on the coil bobbin 220 with the side of the auxiliary movable terminal portion 622 on which the auxiliary movable contact 621 is formed (upper surface: the surface facing the auxiliary fixed contact 611) facing upward.

[0107] Furthermore, the auxiliary movable contact 621, auxiliary movable terminal portion 622, terminal portion 623, and connecting portion 626 can be formed from conductive materials such as silver-based materials or copper-based materials.

[0108] The set, consisting of one auxiliary fixed contact portion 610 and one auxiliary movable contact portion 620, is housed in the internal space S1, rearward in the X direction (front-to-back direction: first direction) from the first side wall 131 and on the upper end side of the coil 210 (see Figures 12 to 15). The auxiliary fixed contact 611 and the auxiliary movable contact 621 are positioned above the head portion 232 of the iron core 230 in the Z direction (up and down direction).

[0109] Here, the auxiliary movable contact portion 620 is arranged so that the auxiliary movable terminal portion 622 can swing relative to the auxiliary fixed contact portion 610 in the Z direction (up and down direction). In this embodiment, the auxiliary drive unit 70 enables the auxiliary movable terminal portion 622 to swing relative to the auxiliary fixed contact portion 610 in the Z direction (up and down direction). That is, by switching the drive state of the electromagnet device 20 and swinging the auxiliary drive unit 70, it is possible to switch between conductivity and non-conduction between the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620, which are paired (have auxiliary contacts that move toward and away from each other).

[0110] In this embodiment, the auxiliary drive unit 70 is made of an insulating resin material and is held on the horizontal wall portion 311 of the axle 310. The auxiliary drive unit 70 is made to swing in the Z direction (up and down direction) in accordance with the swinging of the axle 310. In this way, the auxiliary movable terminal portion 622 is made to swing in the Z direction (up and down direction) in accordance with the swinging of the auxiliary drive unit 70 in the Z direction (up and down direction).

[0111] The auxiliary drive unit 70 comprises a main body 71 and a fixing part 72 that is connected to the main body 71 so as to protrude outward in the Y direction (width direction) and is held by the horizontal wall portion 311 of the axle 310. Furthermore, the auxiliary drive unit 70 comprises a push-up part 73 that is connected to the main body 71 so as to protrude rearward in the X direction (front-rear direction) and pushes the auxiliary movable terminal portion 622 upward.

[0112] Furthermore, in this embodiment, the fixing portion 72 includes an arm portion 721 that protrudes outward in the Y direction (width direction), and a hook portion 722 that is connected from the outer end of the arm portion 721 in the Y direction (width direction) downward in the Z direction (vertical direction).

[0113] Furthermore, a holding portion 3112 for holding the auxiliary drive unit 70 is formed at the rear of the horizontal wall portion 311 of the axle 310 in the X direction (front-to-back direction). The auxiliary drive unit 70 is held in place by the horizontal wall portion 311 of the axle 310 by hooking a pair of hook portions 72 onto this holding portion 3112.

[0114] Thus, in this embodiment, the auxiliary drive unit 70 is made to swing in conjunction with the swing of the axle 310, thereby enabling the electrical and non-electrical connections between the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620, which have auxiliary contacts that move toward and toward each other. In other words, the main contact portion 40 is moved toward and toward by one end of the axle 310, and the auxiliary contact portion 60 is moved toward and toward by the other end of the axle 310.

[0115] With this configuration, the auxiliary movable contact portion 620 swings relative to the auxiliary fixed contact portion 610 in the Z direction (vertical direction) as the axle 310 swings. At this time, the auxiliary movable contact 621 swings in an arc centered on the outer end of the auxiliary movable terminal portion 622 in the Y direction (width direction).

[0116] In this embodiment, the auxiliary movable terminal portion 622 is connected to the terminal portion 623 of the coil bobbin 220, in which the auxiliary movable contact 621 is separated from the auxiliary fixed contact 611 in its natural state. When the power supply to the coil 210 is stopped, the push-up portion 73 of the auxiliary drive unit 70 contacts the auxiliary movable terminal portion 622, pushing it upward so that the auxiliary movable contact 621 comes into contact with the auxiliary fixed contact 611.

[0117] On the other hand, when the coil 210 is energized, the rear end of the horizontal wall portion 311 of the axle 310 rotates downward, and as the rear end of the horizontal wall portion 311 rotates downward, the auxiliary drive unit 70 moves downward. When the auxiliary drive unit 70 moves downward, the auxiliary movable terminal portion 622 moves downward due to the elastic restoring force, and the auxiliary movable contact 621 separates from the auxiliary fixed contact 611.

[0118] Alternatively, the auxiliary drive unit 70 may be used to drive the auxiliary movable terminal 622 by other means. Another method for the auxiliary drive unit 70 to drive the auxiliary movable terminal 622 is, for example, to cause the auxiliary movable contact 621 to contact the auxiliary fixed contact 611 and become conductive when the auxiliary drive unit 70 is separated from the auxiliary movable terminal 622 due to the elastic restoring force of the auxiliary movable terminal 622, and then cause the auxiliary movable contact 621 to separate from the auxiliary fixed contact 611 and become non-conductive when the auxiliary drive unit 70 pushes down the auxiliary movable terminal 622.

[0119] Thus, in this embodiment, the auxiliary contact portion 60 is provided such that the ON state and OFF state are opposite to those of the main contact portion 40.

[0120] Next, an example of the operation of the electromagnetic relay 1 configured as described above will be explained.

[0121] First, when the coil 210 is not energized, the elastic force of the hinge spring 320 causes the horizontal wall portion 311 of the axle 310 to move away from the head portion 232 of the iron core 230. At this time, the vertical wall portion 312 of the axle 310 is located to the rear in the X direction (front-back direction), and therefore the movable part 50 is also located to the rear in the X direction (front-back direction). In other words, the main movable contact portion 420 held by the movable part 50 is separated from the main fixed contact portion 410, and the main movable contact 421 is separated from the main fixed contact 411 (see Figures 12 and 14).

[0122] Meanwhile, the auxiliary drive unit 70 also moves away from the head 232 of the iron core 230, so the auxiliary movable terminal 622 is pushed up by the push-up portion 73 of the auxiliary drive unit 70, and the auxiliary movable contact 621 comes into contact with the auxiliary fixed contact 611 (see Figures 12 and 14).

[0123] When the coil 210 is energized from this off state, the horizontal wall portion 311 of the axle 310 is attracted downward (towards the iron core 230) by electromagnetic force and moves closer to the head portion 232 of the iron core 230, resisting the elastic force of the hinge spring 320. As the horizontal wall portion 311 rotates downward (towards the iron core 230), the vertical wall portion 312 rotates forward, and as the vertical wall portion 312 rotates forward, the movable portion 50 rotates forward. As a result, the movable contact 422 held by the movable portion 50 rotates forward toward the main fixed contact portion 410, and the main movable contact 421 of the movable contact 422 comes into contact with the main fixed contact 411 of the main fixed contact portion 410. In this way, the pair of main fixed contact portions 410 are electrically connected by the main movable contact portion 420 (see Figures 13 and 15).

[0124] Meanwhile, the auxiliary drive unit 70 also moves toward the head 232 of the iron core 230, causing the push-up portion 73 of the auxiliary drive unit 70 to be lowered, and the auxiliary movable contact 621 to be separated from the auxiliary fixed contact 611. This releases the electrical connection between the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 (see Figures 13 and 15). (See Figures 12 and 14).

[0125] Then, when the current to the coil 210 is stopped in this state, the horizontal wall portion 311 of the abutment 310 rotates upward (away from the iron core 230) due to the biasing force of the hinge spring 320 and returns to its initial position. In addition, as the horizontal wall portion 311 rotates upward, the vertical wall portion 312 rotates backward, and as the vertical wall portion 312 rotates backward, the movable portion 50 rotates backward. As a result, the movable contact 422 held by the movable portion 50 rotates backward so as to move away from the main fixed contact portion 410, and the main movable contact 421 of the movable contact 422 separates from the main fixed contact 411 of the main fixed contact portion 410. In this way, the electrical connection between the pair of main fixed contact portions 410, 410 is released.

[0126] Meanwhile, the auxiliary drive unit 70 also moves away from the head 232 of the iron core 230, so the auxiliary movable terminal 622 is pushed up by the push-up portion 73 of the auxiliary drive unit 70 and returns to its initial position. As a result, the auxiliary movable contact 621 comes into contact with the auxiliary fixed contact 611, and the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 are electrically connected.

[0127] Thus, in this embodiment, when the axle 310 is in the initial position, the main movable contact 421 and the main fixed contact 411 are separated from each other, and the auxiliary movable contact 621 and the auxiliary fixed contact 611 are in contact, which is the second position (see Figures 12 and 14). On the other hand, when the axle 310 is in the contact position, the main movable contact 421 and the main fixed contact 411 are in contact, and the auxiliary movable contact 621 and the auxiliary fixed contact 611 are separated from each other, which is the first position (see Figures 13 and 15).

[0128] Therefore, during periods when the coil 210 is not energized, the pair of main fixed contacts 410, 410 are insulated from each other, and during periods when the coil 210 is energized, the pair of main fixed contacts 410, 410 are electrically connected. Thus, in this embodiment, the main movable contact 421 is configured to reciprocate (rotate) relative to the main fixed contact 411 in the first direction (X direction: front-back direction) between the first position and the second position.

[0129] On the other hand, during periods when the coil 210 is not energized, the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 are insulated from each other, and during periods when the coil 210 is energized, the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 become electrically connected. Thus, in this embodiment, the auxiliary movable contact 621 is configured to reciprocate (rotate) relative to the auxiliary fixed contact 611 in the axial direction (Z direction: up and down direction) between the first position and the second position.

[0130] In this state, when the coil 210 is in the first position where the main movable contact 421 and the main fixed contact 411 are in contact, the current supply to the coil 210 is stopped, causing the main movable contact 421 to open and separate from the main fixed contact 411.

[0131] When this opening process begins, an arc is generated between the main movable contact 421 and the main fixed contact 411 in the initial stages of opening, and this arc maintains the current flow.

[0132] Therefore, by extending the arc generated between the main movable contact 421 and the main fixed contact 411 backward in the X direction (front-to-back direction), the arc generated between the main movable contact 421 and the main fixed contact 411 is extinguished more reliably and quickly.

[0133] At this time, the arc generated between the main movable contact 421 and the main fixed contact 411 is stretched within the space formed between the second side wall 132 and the side wall 1223 of the case 120. Therefore, in this embodiment, the space formed between the second side wall 132 and the side wall 1223 of the case 120 becomes the arc stretching space S4 that stretches the arc (see Figure 5).

[0134] Incidentally, it is possible to miniaturize the electromagnetic relay 1 by extending the arc generated between the main movable contact 421 and the main fixed contact 411 to the rear in the X direction (front-to-back direction). However, when extending the arc to the rear in the X direction (front-to-back direction), consumable powder and the like may scatter to the rear in the X direction (front-to-back direction) along with the extended arc. In this case, if the space S2 in the internal space S1 of the housing 10 where the main contact portion 40 is located and the space S3 where the auxiliary contact portion 60 is located are connected by a large passage, the auxiliary contact portion 60 may be affected by consumable powder and the like.

[0135] Thus, when the space S2 in which the main contact portion 40 is located and the space S3 in which the auxiliary contact portion 60 is located are in complete communication, the auxiliary contact portion 60 may be affected by consumable dust and other debris. In particular, in electromagnetic relays through which large currents flow, the auxiliary contact portion 60 will be greatly affected by consumable dust and other debris.

[0136] Therefore, in this embodiment, even when the current flowing through the main contact portion 40 is large, the decrease in contact reliability of the auxiliary contact portion 60 can be more reliably suppressed. Specifically, a partition wall 130 is formed to divide the internal space S1 into a main contact side space S2 in which the main contact portion 40 exists and an auxiliary contact side space S3 in which the auxiliary contact portion 60 exists. In other words, the main contact side space S2 and the auxiliary contact side space S3 of the internal space S1 can be defined by the continuous portion of the partition wall 130.

[0137] Furthermore, by providing this partition wall 130, the main contact side space S2 where the main contact portion 40 is located and the auxiliary contact side space S3 where the auxiliary contact portion 60 is located can be connected through a narrower gap. In other words, by providing the partition wall 130, the connection between the contact side space S2 and the auxiliary contact side space S3 through a relatively wide gap is suppressed as much as possible. This makes it possible to more reliably suppress the entry of consumable dust and other debris generated at the main contact portion 40 into the auxiliary contact side space S3 where the auxiliary contact portion 60 is located.

[0138] In this embodiment, the partition wall 130 includes a first side wall 131 connected to the base 110 so as to extend along the Z direction (up and down direction: axial direction) on the front side (one side of the first direction intersecting the axial direction) of the coil 210 in the X direction (front-back direction).

[0139] Furthermore, the partition wall 130 includes a pair of second side walls 132 that are arranged on both sides in the Y direction (width direction: a second direction intersecting the axial direction of the coil and the first direction) and are connected to the base 110 so as to extend along the Z direction (vertical direction: axial direction).

[0140] Thus, in this embodiment, the first side wall 131 and the pair of second side walls 132 for supporting the yoke 240 also function as partition walls 130 that divide the main contact area 40 into a main contact area S2 and an auxiliary contact area S3 where the auxiliary contact area 60 is located.

[0141] Furthermore, the first side wall 131 is connected to the base 110 such that the main contact portion 40 and the movable portion 50 are located on the front side in the X direction (front-rear direction), and the auxiliary contact portion 60 and the coil 210 are located on the rear side in the X direction (front-rear direction) (the other side of the first direction intersecting the axial direction).

[0142] Furthermore, the first side wall 131 and the pair of second side walls 132 surround at least a portion of the side surface 210a of the coil 210.

[0143] Furthermore, in this embodiment, the partition wall 130 is provided with a pair of third side walls 133 arranged side by side in the Y direction (width direction: second direction), along the Z direction (vertical direction: axial direction), and along the second side wall 132 (see Figures 16 and 17).

[0144] In this embodiment, the third side wall 133 is formed on the inside of the case 120. Specifically, the third side wall 133 extends from the inner surface of the top wall 121 along the X direction (front-to-back direction: first direction) and the Z direction (up-down direction: axial direction). Furthermore, the rear end of the third side wall 133 in the X direction (front-to-back direction: first direction) is in contact with the inner surface of the rear wall 1222.

[0145] Then, with the case 120 attached to the base 110, the lower end of the third side wall 133 is positioned outside the second side wall 132 in the Y direction (width direction: second direction). At this time, there is almost no gap formed between the lower end of the third side wall 133 and the second side wall 132 (see Figures 18 to 20).

[0146] Thus, in this embodiment, the third side wall 133 is provided on the case 120 so as to overlap with the second side wall 132 when viewed from the Y direction (width direction: second direction).

[0147] Here, the main contact side space S2 includes an internal space S1 facing the front side surface in the X direction of the first side wall 131, an internal space S1 facing the outward side surfaces in the Y direction of the pair of second side walls 132, and an internal space S1 facing the outward side surface in the Y direction of the third side wall 133. On the other hand, the auxiliary contact side space S3 includes an internal space S1 facing the rear side surface in the X direction of the first side wall 131, an internal space S1 facing the inward side surfaces in the Y direction of the pair of second side walls 132, and an internal space S1 facing the inward side surface in the Y direction of the third side wall 133. In the portion where the second side wall 132 and the third side wall 133 overlap, the internal space S1 facing the outward side surface in the Y direction of one of the second side wall 132 and the third side wall 133 is the main contact side space S2, and the internal space S1 facing the inward side surface in the Y direction of the other side wall is the auxiliary contact side space S3.

[0148] Furthermore, the pair of third side walls 133 are provided at the same height as the contact periphery of the auxiliary contact portion 60 in the Z direction (vertical direction: up and down direction) with respect to the bottom surface 111a of the base 110, when the base 110 is positioned below the case 120 (see Figures 18 and 21). That is, the pair of third side walls 133 overlap with at least a portion of the contact periphery of the auxiliary contact portion 60 when viewed from a direction perpendicular to the Z direction. In this embodiment, the contact periphery consists of the auxiliary fixed contact 611, the terminal portion 612 around the auxiliary fixed contact 611 (horizontal piece 613, upper end of side piece 614), the auxiliary movable contact 621 and auxiliary movable terminal portion 622, horizontal piece 624, and upper end of side piece 625, which are movable within the movable range of the auxiliary movable terminal portion 622.

[0149] The contact area of ​​the auxiliary contact portion 60 is located at the upper end of the auxiliary contact portion 60. The pair of third side walls 133 are provided at the same height as at least one of the auxiliary fixed contact 611 and the auxiliary movable contact 621 in the Z direction with respect to the bottom surface 111a of the base 110. The pair of third side walls 133 may also be provided higher than the head 232 of the iron core 230 in the Z direction with respect to the bottom surface 111a of the base 110.

[0150] In this embodiment, when viewed from the Y direction (width direction: second direction), the entire auxiliary movable terminal portion 622 on which the auxiliary movable contact 621 is provided and the entire horizontal piece 613 on which the auxiliary fixed contact 611 is provided (the terminal portion 612 around the auxiliary fixed contact 611) are arranged to overlap with the third side wall 133. That is, the contact area of ​​the auxiliary contact portion 60 (the entire auxiliary movable terminal portion 622 on which the auxiliary movable contact 621 is provided and the horizontal piece 613 on which the auxiliary fixed contact 611 is provided) is arranged between a pair of third side walls 133 in the Y direction (width direction: second direction).

[0151] In this way, the arc extension space S4 and the auxiliary contact space S3 of the main contact space S2 are separated by the third side wall 133. Furthermore, this third side wall 133 more reliably prevents consumable particles generated at the main contact portion 40 from entering the auxiliary contact space S3 through the arc extension space S4.

[0152] Furthermore, in this embodiment, the main contact side space S2 is located above the main contact portion 40 and has a roughly L-shaped space when viewed from the Y direction (width direction: second direction). This space is the axle arrangement space S5 in which the axle 310 is placed (see Figures 14 and 15). Since the axle 310 is placed in the axle arrangement space S5 in a state where oscillation is permitted, a relatively large gap is formed between the axle 310 and the case 120 within the axle arrangement space S5. As a result, there is a risk that the axle 310 may shift position when it oscillates, or that consumable dust generated at the main contact portion 40 may enter the auxiliary contact side space S3 through the relatively large gap formed between the axle 310 and the case 120.

[0153] Therefore, in this embodiment, the partition wall 130 is provided with a fourth side wall 134 that protrudes downward in the Z direction (vertical direction) when the base 110 is positioned below the case 120. This fourth side wall 134 extends in the Y direction (width direction: second direction) and faces the armature 310 in the Z direction (vertical direction) (see Figures 14 and 15).

[0154] Furthermore, in this embodiment, the fourth side wall 134 is positioned in front of the vertical wall portion (upright portion) 241 of the yoke 240 in the X direction (front-rear direction: first direction) (towards the main contact portion 40), and has a retaining wall 1341 capable of holding down the axle 310.

[0155] The retaining wall 1341 comprises a projection 1341a formed in the center in the Y direction (width direction: second direction) and a pair of recesses 1341b formed at both ends of the projection 1341a in the Y direction (width direction: second direction) (see Figures 16 and 17). Furthermore, the retaining wall 1341 comprises a pair of retaining wall-side extensions 1341c formed on the outside of the pair of recesses 1341b in the Y direction (width direction: second direction). The pair of retaining wall-side extensions 1341c are formed so that their outer sides in the Y direction (width direction: second direction) are in contact with the inner surface of the side wall 1223.

[0156] With the case 120 attached to the base 110, the lower end of the projection 1341a is inserted into the through hole 313 formed in the axle 310 (see Figures 22 and 23). Also, with the case 120 attached to the base 110, the pair of recesses 1341b are positioned to face each other in the Y direction (width direction: second direction) and the Z direction (up and down direction: axial direction) of the through hole 313 in the axle 310. Furthermore, with the case 120 attached to the base 110, the axle 310 is positioned between the pair of retaining wall-side extensions 1341c in the Y direction (width direction: second direction).

[0157] By providing a retaining wall 1341 of this shape on the case 120, displacement of the axle 310 during oscillation is suppressed. Furthermore, because the axle arrangement space S5 is divided in the X direction (front-to-back direction: first direction) by the retaining wall 1341, the intrusion of consumable dust generated at the main contact portion 40 into the auxiliary contact side space S3 can be more reliably suppressed by the retaining wall 1341.

[0158] Furthermore, the fourth side wall 134 is positioned behind the vertical wall portion (upright portion) 241 of the yoke 240 in the X direction (front-back direction: first direction) (towards the auxiliary contact portion 60), and has a partition wall 1342 that can divide the space S5 above the axle 310.

[0159] Furthermore, the main contact side space S2 includes an internal space S1 facing the front side in the X direction of the fourth side wall 134 (retaining wall 1341, partition wall 1342). On the other hand, the auxiliary contact side space S3 includes an internal space S1 facing the rear side in the X direction of the fourth side wall 134 (retaining wall 1341, partition wall 1342).

[0160] The partition wall 1342 comprises a recess 1342a formed in the center in the Y direction (width direction: second direction) and a pair of partition wall-side extensions 1342b formed at both ends of the recess 1342a in the Y direction (width direction: second direction) (see Figures 16 and 17). The pair of partition wall-side extensions 1342b are formed so that their outer sides in the Y direction (width direction: second direction) are connected to the front end of the third side wall 133.

[0161] Then, with the case 120 attached to the base 110, the lower end of the recess 1342a is positioned to face the axle 310 (upper surface of the water wall portion 311) in the Z direction (vertical direction: up and down direction) (see Figures 14 and 15). Furthermore, with the case 120 attached to the base 110, the axle 310 is positioned between a pair of partition wall-side extensions 1342b in the Y direction (width direction: second direction).

[0162] Thus, in this embodiment, the partition wall 1342 has partition wall-side extensions 1342b that are positioned on both sides of the armature 310 in the Y direction (width direction: second direction). Furthermore, in this embodiment, the partition wall-side extensions 1342b have a portion that is located outside the second side wall 132 in the Y direction (width direction: second direction) (see Figure 21).

[0163] By providing a partition wall 1342 of this shape in the case 120, the partition wall 1342 prevents consumable powder and other debris that could not be completely blocked by the retaining wall 1341 from entering the auxiliary contact side space S3.

[0164] Furthermore, in this embodiment, the partition wall 130 extends in the Z direction (vertical direction) and has a fifth side wall 135 provided on the case 120 so as to be located outside the second side wall 134 in the Y direction (width direction).

[0165] In this embodiment, a thickened portion 1223a is formed in the center of the side wall 1223 of the case 120 in the X direction (front-to-back direction: first direction). A fifth side wall 135 extends from the center of this thickened portion 1223a in the X direction (front-to-back direction: first direction) so as to project inward in the Y direction (width direction: second direction). The fifth side wall 135 also extends from the top wall 121 of the case 120 so as to project downward in the Z direction (up-down direction: axial direction). When the case 120 is attached to the base 110, the lower end of the fifth side wall 135 extends to a position where it almost abuts the base portion 111 of the base 110.

[0166] Furthermore, in this embodiment, the fifth side wall 135 is formed integrally with the third side wall 133 and the partition wall-side extension 1342b. Specifically, the fifth side wall 135, the third side wall 133, and the partition wall-side extension 1342b are formed by integral molding.

[0167] By providing a fifth side wall 135 with this shape, the arc extension space S4 is divided in the X direction (front-to-back direction: first direction), so the fifth side wall 135 can more reliably prevent consumable powder generated at the main contact portion 40 from entering the auxiliary contact side space S3.

[0168] In this embodiment, the main contact side space S2 includes an internal space S1 facing the front side surface in the X direction of the fifth side wall 135. On the other hand, the auxiliary contact side space S3 includes an internal space S1 facing the rear side surface in the X direction of the fifth side wall 135.

[0169] (Second Embodiment) As shown in Figures 24 to 27, the electromagnetic relay 1 according to this embodiment has substantially the same configuration as the electromagnetic relay 1 shown in the first embodiment described above.

[0170] In other words, the electromagnetic relay 1 according to this embodiment includes a housing 10 having a base 110 and a case 120 that covers the base 110.

[0171] Furthermore, it includes a main fixed contact 411 and a main movable contact 421 that moves toward and away from the main fixed contact 411, and a main contact portion 40 that is located in the internal space S1 formed within the housing 10.

[0172] Furthermore, it includes an auxiliary contact section 60 located in the internal space S1, which has an auxiliary fixed contact 611 and an auxiliary movable contact 621 that moves in and out of contact with the auxiliary fixed contact 611.

[0173] Furthermore, with the base 110 positioned below the case 120, the device includes a coil 210 positioned in the internal space S1 such that its axial direction extends in the Z direction (up and down direction), and a yoke 240 positioned around the coil 210.

[0174] The device also includes an abutment 310 that oscillates in accordance with the excitation and de-excitation of the coil 210, and a movable part 50 that moves the main movable contact 421 in accordance with the oscillation of the abutment 310.

[0175] Furthermore, the electromagnetic relay 1 according to this embodiment also includes a partition wall 130 that divides the internal space S1 into a main contact side space S2 where the main contact portion 40 is located and an auxiliary contact side space S3 where the auxiliary contact portion 60 is located.

[0176] Furthermore, this bulkhead 130 includes a first side wall 131 connected to the base 110 so as to extend along the Z direction (up and down direction: axial direction) on the front side (one side of the first direction intersecting the axial direction) of the coil 210 in the X direction (front-back direction).

[0177] Furthermore, the partition wall 130 includes a pair of second side walls 132 that are arranged on both sides in the Y direction (width direction: a second direction intersecting the axial direction of the coil and the first direction) and are connected to the base 110 so as to extend along the Z direction (vertical direction: axial direction).

[0178] Furthermore, the first side wall 131 is connected to the base 110 such that the main contact portion 40 and the movable portion 50 are located on the front side in the X direction (front-rear direction), and the auxiliary contact portion 60 and the coil 210 are located on the rear side in the X direction (front-rear direction) (the other side of the first direction intersecting the axial direction).

[0179] Furthermore, the first side wall 131 and the pair of second side walls 132 surround at least a portion of the side surface 210a of the coil 210.

[0180] Furthermore, in this embodiment as well, the partition wall 130 is arranged in the Y direction (width direction: second direction) and includes a pair of third side walls 133 that are provided along the Z direction (vertical direction: axial direction) and along the second side wall 132.

[0181] Furthermore, with the base 110 positioned below the case 120, the pair of third side walls 133 are provided at the same height as the contact area of ​​the auxiliary contact portion 60 in the Z direction (vertical direction: up and down direction) with respect to the bottom surface 111a of the base 110 (see Figures 30 and 32). The pair of third side walls 133 are provided at the same height as at least one of the auxiliary fixed contact 611 and the auxiliary movable contact 621 in the Z direction with respect to the bottom surface 111a of the base 110. In this embodiment as well, the pair of third side walls 133 may be provided higher than the head 232 of the iron core 230 in the Z direction with respect to the bottom surface 111a of the base 110.

[0182] Furthermore, in this embodiment as well, the partition wall 130 includes a fourth side wall 134 provided on the case 120 so as to protrude downward in the Z direction (vertical direction) with the base 110 positioned below the case 120 (see Figures 28 and 29). This fourth side wall 134 extends in the Y direction (width direction: second direction) and faces the armature 310 in the Z direction (vertical direction) (see Figures 32 and 33).

[0183] Furthermore, the fourth side wall 134 is positioned in front of the vertical wall portion (upright portion) 241 of the yoke 240 in the X direction (front-back direction: first direction) (towards the main contact portion 40), and has a retaining wall 1341 capable of holding down the axle 310.

[0184] The retaining wall 1341 comprises a projection 1341a formed in the center in the Y direction (width direction: second direction) and a pair of recesses 1341b formed at both ends of the projection 1341a in the Y direction (width direction: second direction) (see Figures 28 and 29). Furthermore, the retaining wall 1341 comprises a pair of retaining wall-side extensions 1341c formed on the outside of the pair of recesses 1341b in the Y direction (width direction: second direction). The pair of retaining wall-side extensions 1341c are formed so that their outer sides in the Y direction (width direction: second direction) are in contact with the inner surface of the side wall 1223.

[0185] With the case 120 attached to the base 110, the lower end of the projection 1341a is inserted into the through hole 313 formed in the axle 310 (see Figure 32). Also, with the case 120 attached to the base 110, the pair of recesses 1341b are positioned to face each other in the Y direction (width direction: second direction) and the Z direction (up and down direction: axial direction) of the through hole 313 in the axle 310. Furthermore, with the case 120 attached to the base 110, the axle 310 is positioned between the pair of retaining wall-side extensions 1341c in the Y direction (width direction: second direction).

[0186] In this embodiment, the third side wall 133 is formed on the base 110, and the third side wall 133 and the second side wall 132 are integrally formed (see Figures 26 and 27). Specifically, the third side wall 133 and the second side wall 132 are integrally formed. Furthermore, the wall portion of the partition wall 130 that extends in the X direction (front-to-back direction: first direction) and the Z direction (up-down direction: axial direction) is formed such that its upper end protrudes upward in the Z direction (up-down direction: axial direction) above the upper end of the first side wall 131 (see Figures 26 and 27). The portion of the wall portion described above that is connected to the first side wall 131 (the portion of the wall portion described above that is located below the upper end of the first side wall 131) is designated as the second side wall 132, and the portion that protrudes upward above the portion designated as the second side wall (the portion of the wall portion described above that is not connected to the first side wall 131) is designated as the third side wall 133.

[0187] Furthermore, in this embodiment, the second side wall 132 has an extended portion 1321 that extends outward in the Y direction (width direction: second direction). This extended portion 1321 extends from the rear end of the second side wall 132 in the X direction (front-to-back direction: first direction) in the Y direction (width direction: second direction) and the Z direction (up-down direction: axial direction). In addition, an extended portion 1331 extends from the upper end of the extended portion 1321, extending from the rear end of the third side wall 133 in the X direction (front-to-back direction: first direction) in the Y direction (width direction: second direction) and the Z direction (up-down direction: axial direction), and the extended portion 1321 and the extended portion 1331 are formed integrally. Thus, in this embodiment, the wall portion composed of the extended portion 1321 and the extended portion 1331 is formed from the lower end of the second side wall 132 to the upper end of the third side wall 133 (see Figures 26 and 27).

[0188] Furthermore, in this embodiment, the extended portion 1321 is designed so that, when the case 120 is attached to the base 110, there is almost no gap between the outer end face in the Y direction (width direction: second direction) and the inner surface of the side wall 1223 of the case 120 (see Figures 30 to 32).

[0189] Thus, in this embodiment, by providing the extended portion 1321, the arc extension space S4 is divided in the X direction (front-back direction: first direction). Furthermore, the extended portion 1321 more reliably prevents consumable particles generated at the main contact portion 40 from entering the auxiliary contact side space S3 (see Figures 32 and 33).

[0190] In this embodiment, a fourth side wall 134 is provided as an example, which is positioned in front of the vertical wall portion (upright portion) 241 of the yoke 240 in the X direction (front-rear direction: first direction) (towards the main contact portion 40) and does not have a retaining wall 1341 capable of holding down the axle 310.

[0191] Even with such an electromagnetic relay 1, it can perform almost the same functions and effects as the electromagnetic relay 1 shown in the first embodiment described above.

[0192] (Third embodiment) As shown in Figures 34 to 37, the electromagnetic relay 1 according to this embodiment has substantially the same configuration as the electromagnetic relay 1 shown in the first embodiment described above.

[0193] In other words, the electromagnetic relay 1 according to this embodiment includes a housing 10 having a base 110 and a case 120 that covers the base 110.

[0194] Furthermore, it includes a main fixed contact 411 and a main movable contact 421 that moves toward and away from the main fixed contact 411, and a main contact portion 40 that is located in the internal space S1 formed within the housing 10.

[0195] Furthermore, it includes an auxiliary contact section 60 located in the internal space S1, which has an auxiliary fixed contact 611 and an auxiliary movable contact 621 that moves in and out of contact with the auxiliary fixed contact 611.

[0196] Furthermore, with the base 110 positioned below the case 120, the device includes a coil 210 positioned in the internal space S1 such that its axial direction extends in the Z direction (up and down direction), and a yoke 240 positioned around the coil 210.

[0197] The device also includes an abutment 310 that oscillates in accordance with the excitation and de-excitation of the coil 210, and a movable part 50 that moves the main movable contact 421 in accordance with the oscillation of the abutment 310.

[0198] Furthermore, the electromagnetic relay 1 according to this embodiment also includes a partition wall 130 that divides the internal space S1 into a main contact side space S2 where the main contact portion 40 is located and an auxiliary contact side space S3 where the auxiliary contact portion 60 is located.

[0199] Furthermore, this bulkhead 130 includes a first side wall 131 connected to the base 110 so as to extend along the Z direction (up and down direction: axial direction) on the front side (one side of the first direction intersecting the axial direction) of the coil 210 in the X direction (front-back direction).

[0200] Furthermore, the partition wall 130 includes a pair of second side walls 132 that are arranged on both sides in the Y direction (width direction: a second direction intersecting the axial direction of the coil and the first direction) and are connected to the base 110 so as to extend along the Z direction (vertical direction: axial direction).

[0201] Furthermore, the first side wall 131 is connected to the base 110 such that the main contact portion 40 and the movable portion 50 are located on the front side in the X direction (front-rear direction), and the auxiliary contact portion 60 and the coil 210 are located on the rear side in the X direction (front-rear direction) (the other side of the first direction intersecting the axial direction).

[0202] Furthermore, the first side wall 131 and the pair of second side walls 132 surround at least a portion of the side surface 210a of the coil 210.

[0203] Furthermore, in this embodiment as well, the partition wall 130 is arranged in the Y direction (width direction: second direction) and includes a pair of third side walls 133 that are provided along the Z direction (vertical direction: axial direction) and along the second side wall 132.

[0204] In this embodiment as well, the third side wall 133 is formed on the inside of the case 120. Specifically, the third side wall 133 extends from the inner surface of the top wall 121 along the X direction (front-to-back direction: first direction) and the Z direction (up-down direction: axial direction). Furthermore, the third side wall 133 is formed so that its rear end in the X direction (front-to-back direction: first direction) is in contact with the inner surface of the rear wall 1222.

[0205] Then, with the case 120 attached to the base 110, the lower end of the third side wall 133 is positioned outside the second side wall 132 in the Y direction (width direction: second direction). At this time, there is almost no gap formed between the lower end of the third side wall 133 and the second side wall 132 (see Figure 40).

[0206] Thus, in this embodiment, the third side wall 133 is provided on the case 120 so as to overlap with the second side wall 132 when viewed from the Y direction (width direction: second direction).

[0207] Furthermore, with the base 110 positioned below the case 120, the pair of third side walls 133 are provided at the same height as the contact area of ​​the auxiliary contact portion 60 in the Z direction (vertical direction: up and down direction) with respect to the bottom surface 111a of the base 110 (see Figures 32, 40, and 43). The pair of third side walls 133 are provided at the same height as at least one of the auxiliary fixed contact 611 and the auxiliary movable contact 621 in the Z direction with respect to the bottom surface 111a of the base 110. In this embodiment as well, the pair of third side walls 133 may be provided higher than the head 232 of the iron core 230 in the Z direction with respect to the bottom surface 111a of the base 110.

[0208] Furthermore, in this embodiment as well, the partition wall 130 includes a fourth side wall 134 provided on the case 120 so as to protrude downward in the Z direction (vertical direction) with the base 110 positioned below the case 120 (see Figures 38 and 39). This fourth side wall 134 extends in the Y direction (width direction: second direction) and faces the armature 310 in the Z direction (vertical direction) (see Figures 40, 43, and 44).

[0209] Furthermore, the fourth side wall 134 is positioned in front of the vertical wall portion (upright portion) 241 of the yoke 240 in the X direction (front-back direction: first direction) (towards the main contact portion 40), and has a retaining wall 1341 capable of holding down the axle 310.

[0210] The retaining wall 1341 comprises a projection 1341a formed in the center in the Y direction (width direction: second direction) and a pair of recesses 1341b formed at both ends of the projection 1341a in the Y direction (width direction: second direction) (see Figures 38 and 39). Furthermore, the retaining wall 1341 comprises a pair of retaining wall-side extensions 1341c formed on the outside of the pair of recesses 1341b in the Y direction (width direction: second direction). The pair of retaining wall-side extensions 1341c are formed so that their outer sides in the Y direction (width direction: second direction) are in contact with the inner surface of the side wall 1223.

[0211] With the case 120 attached to the base 110, the lower end of the projection 1341a is inserted into the through hole 313 formed in the axle 310. Also, with the case 120 attached to the base 110, the pair of recesses 1341b are positioned opposite each other in the Y direction (width direction: second direction) and the Z direction (up / down direction: axial direction) of the through hole 313 in the axle 310. Furthermore, with the case 120 attached to the base 110, the axle 310 is positioned between the pair of retaining wall-side extensions 1341c in the Y direction (width direction: second direction).

[0212] Furthermore, the fourth side wall 134 is positioned behind the vertical wall portion (upright portion) 241 of the yoke 240 in the X direction (front-to-back direction: first direction) (towards the auxiliary contact portion 60), and has a partition wall 1342 that can divide the space S5 above the axle 310.

[0213] The partition wall 1342 comprises a recess 1342a formed in the center in the Y direction (width direction: second direction) and a pair of partition wall-side extensions 1342b formed at both ends of the recess 1342a in the Y direction (width direction: second direction) (see Figures 38 and 39). The pair of partition wall-side extensions 1342b are formed so that their outer sides in the Y direction (width direction: second direction) are connected to the front end of the third side wall 133.

[0214] With the case 120 attached to the base 110, the lower end of the recess 1342a faces the axle 310 (upper surface of the water wall portion 311) in the Z direction (vertical direction). Furthermore, with the case 120 attached to the base 110, the axle 310 is positioned between a pair of partition wall-side extensions 1342b in the Y direction (width direction: second direction).

[0215] Furthermore, in this embodiment as well, the partition wall 130 extends in the Z direction (vertical direction) and has a fifth side wall 135 provided on the case 120 so as to be located outside the second side wall 134 in the Y direction (width direction: second direction).

[0216] In this embodiment as well, a thickened portion 1223a is formed in the center of the side wall 1223 of the case 120 in the X direction (front-to-back direction: first direction). A fifth side wall 135 is extended from the center of this thickened portion 1223a in the X direction (front-to-back direction: first direction) so as to project inward in the Y direction (width direction: second direction).

[0217] Furthermore, the fifth side wall 135 extends downward from the top wall 121 of the case 120 in the Z direction (vertical direction).

[0218] In this embodiment, with the case 120 attached to the base 110, the lower end of the fifth side wall 135 is positioned midway between the base portion 111 of the base 110 and the top wall 121 of the case 120. The position of the lower end of the fifth side wall 135 only needs to be between the base portion 111 of the base 110 and the top wall 121 of the case 120, and the amount of protrusion of the fifth side wall 135 from the top wall 121 can be set as appropriate. However, it is preferable that the amount of protrusion of the fifth side wall 135 from the top wall 121 is such that a space is not formed in the arc extension space S4 that communicates linearly from the main contact portion 40 to the auxiliary contact side space S3. That is, it is preferable that the shortest route from the main contact portion 40 through the arc extension space S4 to the auxiliary contact side space S3 is a broken line when viewed from the Y direction (width direction: second direction). This ensures that consumable particles generated at the main contact portion 40 must change direction at least once before entering the auxiliary contact side space S3. Therefore, it becomes possible to more reliably suppress the entry of consumable particles generated at the main contact portion 40 into the auxiliary contact side space S3.

[0219] Furthermore, in this embodiment as well, the fifth side wall 135 is formed integrally with the third side wall 133 and the partition wall side extension 1342b.

[0220] In this embodiment, the second side wall 132 has an extended portion 1321 that extends outward in the Y direction (width direction: second direction). This extended portion 1321 extends from the rear end of the second side wall 132 in the X direction (front-to-back direction: first direction) in the Y direction (width direction: second direction) and the Z direction (up-down direction: axial direction). In this embodiment, the extended portion 1321 is formed from the lower end to the upper end (partway up the upper end) of the second side wall 132. That is, the extended portion 1321 is connected to the second side wall 132 such that the upper end of the second side wall 132 protrudes above the upper end of the extended portion 1321 (see Figures 36 and 37).

[0221] Furthermore, in this embodiment, the lower end of the third side wall 133 is positioned near the upper end of the extended portion 1321. In this way, the third side wall 133 is provided on the case 120 such that it overlaps with the second side wall 132 when viewed from the Y direction (width direction: second direction) and overlaps with the extended portion 1321 of the second side wall 132 when viewed from the Z direction (up and down direction: axial direction).

[0222] Furthermore, the fifth side wall 135 is provided on the case 120 such that it overlaps with the extended portion 1321 of the second side wall 132 when viewed from the X direction (front-to-back direction: first direction) (see Figures 41 and 42).

[0223] Even with such an electromagnetic relay 1, it can perform almost the same functions and effects as the electromagnetic relay 1 shown in the first embodiment described above.

[0224] [Effects / Effects] The following describes the characteristic configurations of the electromagnetic relays shown in each of the above embodiments and the effects obtained therefrom.

[0225] (1) The electromagnetic relay 1 shown in each of the above embodiments comprises a housing 10 having a base 110 and a case 120 covering the base 110.

[0226] Furthermore, the electromagnetic relay 1 has a main fixed contact 411 and a main movable contact 421 that moves toward and toward the main fixed contact 411, and comprises a main contact section 40 arranged in the internal space S1 formed within the housing 10. Furthermore, the electromagnetic relay 1 has an auxiliary fixed contact 611 and an auxiliary movable contact 621 that moves toward and toward the auxiliary fixed contact 611, and comprises an auxiliary contact section 60 arranged in the internal space S1.

[0227] Furthermore, the electromagnetic relay 1 includes a coil 210 positioned in the internal space S1 such that its axial direction extends vertically, with the base 110 positioned below the case 120, and a yoke 240 positioned around the coil 210. The electromagnetic relay 1 also includes an axle 310 that oscillates in accordance with the excitation and de-excitation of the coil 210, and a movable part 50 that moves the main movable contact 421 in accordance with the oscillation of the axle 310.

[0228] Furthermore, the electromagnetic relay 1 is equipped with a partition wall 130 that divides the internal space S1 into a main contact side space S2 where the main contact portion 40 is located and an auxiliary contact side space S3 where the auxiliary contact portion 60 is located.

[0229] The bulkhead 130 includes a first side wall 131 connected to the base 110 on one side in a first direction (front-to-back direction: X direction) intersecting the axial direction of the coil 210, extending along the axial direction (up-down direction: Z direction). The bulkhead 130 also includes a pair of second side walls 132, each positioned on both sides of the axial direction of the coil 210 and in a second direction (width direction: Y direction) intersecting the first direction, and connected to the base 110 extending along the axial direction (up-down direction: Z direction). Furthermore, the bulkhead 130 includes a pair of third side walls 133, positioned side by side in the second direction, and provided along the axial direction and along the second side walls 132.

[0230] Here, the first side wall 131 is connected to the base 110 such that the main contact portion 40 and the movable portion 50 are located on one side in a first direction intersecting the axial direction, and the auxiliary contact portion 60 and the coil 210 are located on the other side in the first direction. At least a portion of the side surface 210a of the coil 210 is enclosed by the first side wall 131 and a pair of second side walls 132. A pair of third side walls 133 are provided at the same height as the contact area of ​​the auxiliary contact portion 60 in the axial direction (vertical direction: Z direction) with respect to the bottom surface 110a of the base 110, when the base 110 is positioned below the case 120. The pair of third side walls 133 are provided in the axial direction (up and down direction: Z direction) with respect to the bottom surface 111a of the base 110, either (1) at the same height as at least one of the auxiliary fixed contact 611 and the auxiliary movable contact 621, or (2) higher than the head 232 of the iron core 230.

[0231] As described above, in the electromagnetic relay 1 shown in each embodiment, the partition wall 130 comprises a first side wall 131 that surrounds at least a portion of the side surface 210a of the coil 210 and a pair of second side walls 132. Furthermore, the partition wall 130 comprises a pair of third side walls 133 that are provided at the same height as the contact area of ​​the auxiliary contact portion 60, and are provided along the axial direction and along the second side walls 132.

[0232] This allows the internal space S1 to be more reliably divided into a main contact side space S2 and an auxiliary contact side space S3 by the first side wall 131, a pair of second side walls 132, and a pair of third side walls 133. In other words, the gap connecting the main contact side space S2 and the auxiliary contact side space S3 can be made as small as possible by the first side wall 131, the pair of second side walls 132, and the pair of third side walls 133. As a result, the auxiliary contact portion 60 can be more reliably prevented from being affected by consumable dust and other debris scattered when the main contact portion 40 makes contact and separates.

[0233] Therefore, with the electromagnetic relay 1 shown in each of the above embodiments, even if the electromagnetic relay 1 has a large current flowing through the main contact portion 40, the possibility of the auxiliary contact portion 60 being affected by consumable dust and the like that scattered when the main contact portion 40 makes contact and separates can be reduced. As a result, it becomes possible to more reliably suppress a decrease in the contact reliability of the auxiliary contact portion.

[0234] Thus, according to the above embodiments, it is possible to obtain an electromagnetic relay that can more reliably suppress a decrease in the contact reliability of the auxiliary contacts not only when the current flowing through the main contacts is small, but also when the current flowing through the main contacts is large.

[0235] (2) Alternatively, the auxiliary contact portion 60 may be positioned on the upper end side of the coil 210 with the base 110 positioned below the case 120.

[0236] This makes it possible to more reliably ensure the insulation distance between the auxiliary contact part 60 and the coil 210.

[0237] (3) Alternatively, the third side wall 133 may be provided on the case 120 such that it overlaps with the second side wall 132 when viewed from the second direction (width direction: Y direction).

[0238] This makes it possible to minimize the gap connecting the main contact space S2 and the auxiliary contact space S3, thereby more reliably suppressing the effects of consumable dust and other debris scattered when the main contact 40 makes contact and separates on the auxiliary contact 60.

[0239] (4) The third side wall 133 may also be formed integrally with the second side wall 132.

[0240] This makes it possible to more reliably prevent a gap from forming between the second side wall 132 and the third side wall 133, and to more reliably prevent the auxiliary contact portion 60 from being affected by consumable dust and other debris scattered when the main contact portion 40 makes contact and separates.

[0241] (5) In addition, an auxiliary contact portion 60 may be arranged between a pair of third side walls 133 in the second direction (width direction: Y direction).

[0242] This makes it possible to more reliably prevent consumable particles and other debris scattered when the main contact portion 40 makes contact and separates from adhering to the auxiliary contact portion 60, thereby more reliably preventing a decrease in the contact reliability of the auxiliary contact portion.

[0243] (6) The partition wall 130 may also include a fourth side wall 134 provided on the case 120 so as to protrude downward in the axial direction (vertical direction: Z direction) when the base 110 is positioned below the case 120. The fourth side wall 134 may extend in the second direction (width direction: Y direction) and face the axle 310 in the axial direction (vertical direction: Z direction).

[0244] This configuration allows the fourth side wall 134 to partition the space formed above the axle 310, and also prevents the axle 310 from moving. As a result, it becomes possible to more reliably prevent consumable particles scattered when the main contact portion 40 makes contact and separates from adhering to the auxiliary contact portion 60 via the space formed above the axle 310. Furthermore, since the gap between the axle 310 and the partition wall 130 does not widen due to the movement of the axle 310, it becomes possible to more reliably prevent consumable particles scattered when the main contact portion 40 makes contact and separate from adhering to the auxiliary contact portion 60.

[0245] (7) The yoke 240 may also have a vertical wall portion (upright portion) 241 extending axially (up and down direction: Z direction) along the first side wall 131 on the outside of the coil 210. The fourth side wall 134 may have a retaining wall 1341 positioned closer to the main contact portion 40 than the vertical wall portion (upright portion) 241 and capable of holding down the axle 310.

[0246] This makes it possible to restrain the portion of the axle 310 closer to the main contact point 40 than the relatively unstable vertical wall portion (upright portion) 241 with the restraining wall 1341. As a result, the gap between the axle 310 and the partition wall 130 does not become too large, and it becomes possible to more reliably prevent consumable dust and other debris scattered when the main contact point 40 makes contact and separates from adhering to the auxiliary contact point 60.

[0247] (8) The retaining wall 1341 may also have retaining wall-side extensions 1341c that are positioned on both sides of the abutment 310 in the second direction (width direction: Y direction).

[0248] This makes it possible to more reliably suppress the gap between the armature 310 and the partition wall 130 from becoming too large.

[0249] (9) The yoke 240 may also have a vertical wall portion (upright portion) 241 extending axially (up and down direction: Z direction) along the first side wall 131 on the outside of the coil 210. The fourth side wall 134 may be positioned closer to the auxiliary contact portion 60 than the vertical wall portion (upright portion) 241 and have a partition wall 1342 capable of dividing the space above the axle 310.

[0250] This allows the space formed above the axle 310 to be partitioned by the partition wall 1342. As a result, it becomes possible to more reliably suppress the adhesion of consumable dust and other debris scattered when the main contact portion 40 makes contact and separates to the auxiliary contact portion 60 by traveling through the space formed above the axle 310.

[0251] (10) The partition wall 1342 may also have partition wall-side extensions 1342b that are arranged on both sides of the abutment 310 in the second direction (width direction: Y direction).

[0252] This makes it possible to more reliably suppress the gap between the armature 310 and the partition wall 130 from becoming too large.

[0253] (11) The partition wall-side extension 1342b may also have a portion located outside the second side wall 132 in the second direction (width direction: Y direction).

[0254] This makes it possible to more reliably suppress the gap between the second side wall 132 and the partition wall extension 1342b from becoming too large.

[0255] (12) The second side wall 132 may also have an extended portion 1321 that extends outward in the second direction (width direction: Y direction).

[0256] This makes it possible to position the extending portion 1321 so as to extend in a direction intersecting the arc extension direction within the space where the arc generated between the main movable contact 421 and the main fixed contact 411 extends. As a result, the extending portion 1321 can suppress the movement of consumable dust and other debris scattered along with the extended arc towards the auxiliary contact portion 60, thereby more reliably suppressing a decrease in the contact reliability of the auxiliary contact portion.

[0257] (13) Alternatively, the third side wall 133 may be provided on the case 120 such that it overlaps with the second side wall 132 when viewed from the second direction (width direction: Y direction) and overlaps with the extended portion 1321 of the second side wall 132 when viewed from the axial direction (up and down direction: Z direction).

[0258] This makes it possible to minimize the gap connecting the main contact space S2 and the auxiliary contact space S3, thereby more reliably suppressing the effects of consumable dust and other debris scattered when the main contact 40 makes contact and separates on the auxiliary contact 60.

[0259] (14) Further, the partition wall 130 may have a fifth side wall 135 provided in the case 120 so as to extend in the axial direction (vertical direction: Z direction) and be disposed outside the second side wall 132 in the second direction (width direction: Y direction). And the fifth side wall 135 may be provided in the case 120 so as to overlap with the extending portion 1321 of the second side wall 132 when viewed from the first direction (front-rear direction: X direction).

[0260] In this way, the extending portion 1321 continuously provided upward from the base 110 and the fifth side wall 135 continuously provided downward from the case 120 will be arranged side by side in the extending direction of the arc. As a result, the space for extending the arc can be made into a shape bent along the extending direction of the arc, and it is possible to more surely suppress the consumption powder and the like scattered together with the extended arc from moving to the auxiliary contact portion 60 side.

[0261] (15) Further, the main contact portion 40 may be connected and disconnected by one end portion of the contact pole 310, and the auxiliary contact portion 60 may be connected and disconnected by the other end portion of the contact pole 310.

[0262] In this way, by simply swinging one contact pole 310, the connection and disconnection of the main contact portion 40 and the connection and disconnection of the auxiliary contact portion 60 can be performed, so that the configuration can be simplified.

[0263] [Others] As described above, the content of the electromagnetic relay according to the present disclosure has been described, but it is obvious to those skilled in the art that it is not limited to these descriptions and various modifications and improvements are possible.

[0264] For example, it is possible to adopt a configuration in which the configurations shown in the above embodiments are appropriately combined.

[0265] Also, in the above embodiments, the case where the auxiliary contact portion 60 is disposed above the coil 210 has been illustrated, but the auxiliary contact portion 60 can also be disposed at the central portion or below the coil 210.

[0266] Furthermore, while the above embodiments illustrate a configuration where the auxiliary contact portion 60 is in the off state when the main contact portion 40 is in the ON state, it is also possible to configure the auxiliary contact portion 60 to be in the ON state when the main contact portion 40 is in the ON state. In this case, it is possible to configure the main contact portion 40 and the auxiliary contact portion 60 as so-called normally closed contact portions that are ON in the initial state, or as so-called normally open contact portions that are OFF in the initial state.

[0267] Furthermore, the base, case, and other detailed specifications (shape, size, layout, etc.) can be changed as needed. [Explanation of Symbols]

[0268] 1 Electromagnetic relay 10 Housing 110 base 111a Bottom 120 cases 130 Bulkhead 131 First side wall 132 Second side wall 1321 Extension 133 Third side wall 134 Fourth side wall 1341 Retaining wall 1341c Projection (extension on the retaining wall side) 1342 Partition wall 1342b Projection (extension on the partition wall side) 135 Fifth side wall 210 coils 210a side 230 Iron core 232 Head 240 yoke 241 Vertical wall section (upright section) 310 Armature 40 Main contact section 411 Main fixed contact 421 Main movable contact 50 Moving parts 60 Auxiliary contact section 611 Auxiliary fixed contact 621 Auxiliary movable contact S1 interior space S2 Main contact side space S3 Space on the auxiliary contact side X Front-back direction (direction intersecting the axis: first direction) Y width direction (axial direction and direction intersecting the first direction: second direction) Z Vertical direction (axial direction)

Claims

1. A housing having a base and a case positioned above the base, An electromagnet device having a coil arranged within the housing, A main contact section having a main fixed contact disposed within the housing and a main movable contact disposed within the housing that moves in and out of contact with the main fixed contact in accordance with the switching on and off of the coil's energization, An auxiliary contact section having an auxiliary fixed contact disposed within the housing and an auxiliary movable contact disposed within the housing that moves toward and away from the auxiliary fixed contact, A partition wall located in front of the auxiliary contact portion and behind the main contact portion, Equipped with, The aforementioned partition wall is A case-side first side wall is provided in the case so as to be located between the housing and the electromagnet device, A second case-side wall is provided in the case, located on the opposite side of the first case-side wall as viewed from the electromagnet device, and positioned between the housing and the electromagnet device. It has, The first side wall on the case side and the second side wall on the case side extend from the inner surface of the case toward the electromagnet device, The aforementioned case includes a top wall above the electromagnet device. The partition wall further comprises a partition wall positioned between the electromagnet device and the ceiling wall. The electromagnetic device further comprises a contactor positioned above the electromagnet and below the partition wall, which swings in accordance with the switching on and off of the coil to bring the main fixed contact and the main movable contact into and out of contact, The partition wall has a recess at a position opposite to the axle, Electromagnetic relay.

2. With the power supply to the coil turned off, the inner surface of the recess faces the side surface of the armature. The electromagnetic relay according to claim 1.

3. The partition wall connects the first side wall on the case side and the second side wall on the case side. An electromagnetic relay according to claim 1 or claim 2.

4. The partition wall extends downward from the top wall of the case. An electromagnetic relay according to claim 1 or claim 2.

5. A housing having a base and a case positioned above the base, An electromagnet device having a coil arranged within the housing, A main contact section having a main fixed contact disposed within the housing and a main movable contact disposed within the housing that moves in and out of contact with the main fixed contact in accordance with the switching on and off of the coil's energization, An auxiliary contact section having an auxiliary fixed contact disposed within the housing and an auxiliary movable contact disposed within the housing that moves toward and away from the auxiliary fixed contact, A partition wall located in front of the auxiliary contact portion and behind the main contact portion, Equipped with, The aforementioned partition wall is A first side wall is disposed between the electromagnet device and the main contact portion, A first second side wall extending rearward from the first side wall, Extending rearward from the first side wall, a second second side wall facing the first second side wall with the coil of the electromagnet device in between, A first extending portion extends from the first second side wall toward the inner surface of the case, which is located on the opposite side of the second second side wall when viewed from the first second side wall, A second extending portion extends from the second side wall toward the inner surface of the case, which is located on the opposite side of the first side wall when viewed from the second side wall, It has, The electromagnetic device further comprises a contactor positioned above the first side wall and above the upper end of the first side wall, which swings in accordance with the switching on and off of the coil to bring the main fixed contact and the main movable contact into and out of contact, The upper end of the first side wall faces the lower surface of the anode, With the current to the coil turned off, the upper end of the first second side wall, the upper end of the second second side wall, the upper end of the first extension portion, and the upper end of the second extension portion are positioned above the upper surface of the armature. Electromagnetic relay.

6. The first side wall, the first second side wall, the second second side wall, the first extension portion, and the second extension portion extend upward from the base. The electromagnetic relay according to claim 5.

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