Electromagnetic relay

Abstract

To provide an electromagnetic relay capable of reliably suppressing a moving contact and a fixed contact from being affected by the arc that occurs when the contact opens while ensuring the terminal cross-sectional area of a current-carrying part.SOLUTION: An electromagnetic relay 1 includes: a housing 10; a pair of fixed contact units 410 having a fixed contact 411; and a moving contact unit 420 having a pair of moving contact 421. The fixed contact unit 410 has an outer extension 415, a terminal connection part 413, and a protrusion 417. Here, the protrusion 417 has a first portion 4171 protruding from the end surface 415c of the outer extension 415 toward the second end of a third shaft and a second portion 4173 protruding toward the moving contact 421 of the surface 410a of the fixed contact unit 410 facing the moving contact unit 420. The projecting portion 417 has a curved portion 4172 that connects the first portion 4171 and the second portion 4173.SELECTED DRAWING: Figure 22

Description

[Technical field]

[0001] The present disclosure relates to electromagnetic relays. [Background technology]

[0002] Conventionally, there has been known an electromagnetic relay that includes a fixed contact portion having a fixed contact, and a movable contact portion having a movable contact that moves relative to the fixed contact and can be brought into contact with and separated from the fixed contact, as disclosed in the following Patent Document 1. In this Patent Document 1, the fixed contact and the movable contact are brought into and out of contact with each other, thereby making it possible to switch between electrical continuity and non-conductivity between the fixed contact portion and the movable contact portion.

[0003] In addition, in Patent Document 1, a pair of fixed contact parts are provided, and the pair of fixed contact parts are arranged in a state where the fixed contacts of each of the pair of fixed contact parts are aligned in the width direction. Also, the movable contact part is formed to extend in the width direction, and the pair of movable contacts are provided on the movable contact part to be aligned in the width direction.

[0004] Furthermore, the movable contact portion is formed with a protrusion that protrudes toward the fixed contact portion, so that an arc that occurs when switching between electrical continuity and non-conduction between the fixed contact portion and the movable contact portion can be quickly moved from the movable contact or the fixed contact to the protrusion, thereby making it possible to prevent the movable contact or the fixed contact from being affected by the arc that occurs when the contacts are opened. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] WO 18 / 190210 Summary of the Invention [Problem to be solved by the invention]

[0006] Although the above-mentioned conventional technology can prevent the movable contact and the fixed contact from being affected by the arc generated when the contacts are opened, it is preferable to more reliably prevent this.

[0007] In order to more reliably prevent the movable contact and the fixed contact from being affected by the arc generated when the contacts are opened, it is possible to provide a protrusion on the fixed contact side as well. When providing such a protrusion, it is possible to form the protrusion by bending the end of the fixed contact in the width direction toward the movable contact side, similar to the protrusion on the movable contact side.

[0008] However, in the above conventional technology, the fixed contact and the lead-out terminal are connected via a terminal connection part, and the fixed contact, the terminal connection part, and the lead-out terminal are arranged in a line in a direction intersecting the width direction. Therefore, in order to bend the end of the fixed contact part in the width direction, it is necessary to form a slit in the conductive part between the fixed contact and the lead-out terminal, which reduces the terminal cross-sectional area of ​​the conductive part.

[0009] Therefore, an object of the present disclosure is to obtain an electromagnetic relay that can more reliably prevent the movable contact and fixed contact from being affected by the arc that occurs when the contacts are opened, while ensuring the terminal cross-sectional area of ​​the current-carrying part. [Means for solving the problem]

[0010] The electromagnetic relay according to the present disclosure includes a housing, a pair of fixed contact sections each having one fixed contact, a movable contact section having a pair of movable contacts each facing the fixed contacts, a pair of lead-out terminals connected respectively to the fixed contact sections and drawn out to the outside of the housing, and a drive section for moving the movable contacts toward and away from the fixed contacts, wherein the pair of fixed contact sections are arranged such that the fixed contacts are aligned along a first axis, the movable contact section extends along the first axis, and the pair of movable contacts are respectively opposed to the fixed contacts along a second axis intersecting the first axis. the fixed contact portion has an outer extension portion arranged outwardly between the pair of fixed contacts which are arranged to be aligned along the first axis, a terminal connection portion connected to the pull-out terminal at a first end side of a third axis which intersects the first axis and the second axis with respect to the fixed contacts, and a protrusion connected to the outer extension portion, the protrusion having a first portion protruding from an end face of the outer extension portion toward the second end side of the third axis, a second portion protruding toward the movable contact side from a surface of the fixed contact portion facing the movable contact portion, and a curved portion connecting the first portion and the second portion. Effect of the Invention

[0011] According to the present disclosure, an electromagnetic relay can be obtained that can more reliably prevent the movable contact and fixed contact from being affected by the arc that occurs when the contacts are opened, while ensuring the terminal cross-sectional area of ​​the current-carrying portion. [Brief description of the drawings]

[0012] [Figure 1] 1 is a first perspective view of an electromagnetic relay according to an embodiment, viewed from diagonally above; [Diagram 2] FIG. 2 is a perspective view of an electromagnetic relay according to an embodiment, as viewed from a second obliquely upward direction. [Diagram 3] FIG. 1 is a diagram showing an electromagnetic relay according to an embodiment, and is an exploded perspective view seen from a first diagonal upper side with a cover removed. [Figure 4]FIG. 2 is a diagram showing an electromagnetic relay according to one embodiment, and is an exploded perspective view seen from a second obliquely upward direction with the cover removed. [Diagram 5] FIG. 4 is a plan view showing members other than a cover of the electromagnetic relay according to the embodiment. [Figure 6] 2 is an exploded perspective view of members other than a cover of an electromagnetic relay according to an embodiment, as viewed from a first obliquely upward direction. FIG. [Figure 7] 4 is an exploded perspective view of members other than a cover of the electromagnetic relay according to the embodiment, as viewed from a second obliquely upward direction. FIG. [Figure 8] 1 is an exploded perspective view of an electromagnetic device included in an electromagnetic relay according to an embodiment, viewed from a first obliquely upward direction. [Figure 9] 1 is an exploded perspective view of a moving member, a movable portion, and a main movable contact portion included in an electromagnetic relay according to an embodiment, as viewed from a first obliquely upward direction. [Figure 10] 2 is an exploded perspective view of a moving member, a movable portion, and a main movable contact portion included in an electromagnetic relay according to an embodiment, as viewed from a second obliquely upward direction. FIG. [Figure 11] 1 is an exploded perspective view of an auxiliary contact portion included in an electromagnetic relay according to an embodiment, as viewed from a first obliquely upward direction. FIG. [Figure 12] FIG. 2 is a perspective view showing contact and separation between a main contact portion and an auxiliary contact portion according to one embodiment, the view showing a state in which the main contact portion and the auxiliary contact portion are in a second position. [Figure 13] FIG. 2 is a perspective view showing contact and separation between a main contact portion and an auxiliary contact portion according to one embodiment, in which the main contact portion and the auxiliary contact portion are in a first position. [Figure 14] FIG. 2 is a vertical cross-sectional view showing the contact and separation of the main contact portion and the auxiliary contact portion in one embodiment, in which the main contact portion and the auxiliary contact portion are in a second position. [Figure 15] FIG. 2 is a vertical cross-sectional view showing the contact and separation of the main contact portion and the auxiliary contact portion in one embodiment, in which the main contact portion and the auxiliary contact portion are in a first position. [Figure 16] FIG. 2 is a perspective view showing the inside of a cover according to one embodiment. [Figure 17]FIG. 4 is a back view of the cover according to one embodiment. [Figure 18] 1 is a perspective view of a main fixed contact portion according to an embodiment, as viewed from a first obliquely upward direction. [Figure 19] 4 is a perspective view of a main fixed contact portion according to one embodiment, as viewed from a second obliquely upward direction. FIG. [Figure 20] FIG. 4 is a front view showing a main fixed contact portion according to one embodiment. [Figure 21] FIG. 4 is a rear view showing the main fixed contact portion according to the embodiment. [Figure 22] FIG. 4 is a side view showing a main fixed contact portion according to one embodiment. [Diagram 23] FIG. 4 is a plan view showing a main fixed contact portion according to one embodiment. [Figure 24] 1 is a perspective view of a movable contact according to an embodiment in a state before a yoke is attached thereto, as viewed from a first obliquely upward direction. [Diagram 25] 11 is a perspective view showing a state before a yoke is attached to the movable contactor according to the embodiment, as viewed from a second obliquely upward direction. FIG. [Figure 26] 1 is a side view showing a state before a yoke is attached to a movable contact according to an embodiment. FIG. [Figure 27] FIG. 2 is a plan view showing a state in which a yoke is attached to the movable contact according to the embodiment. [Figure 28] FIG. 4 is a back view showing a state in which a yoke is attached to the movable contactor according to the embodiment. [Figure 29] FIG. 2 is a front view showing a state in which a yoke is attached to the movable contact according to the embodiment. [Diagram 30] FIG. 4 is a rear view showing a state in which a yoke is attached to the movable contactor according to the embodiment. [Diagram 31] FIG. 2 is a side view showing a state in which a yoke is attached to the movable contact according to the embodiment. [Diagram 32] 5A and 5B are diagrams illustrating a magnetic flux generated when a current flows in one direction through a movable contactor according to an embodiment. [Diagram 33]11A and 11B are diagrams illustrating magnetic fluxes generated when a current flows in another direction through the movable contactor according to the embodiment. [Diagram 34] FIG. 2 is a plan view showing a fixed contact portion, a movable contactor, and a yoke according to an embodiment, in which the contacts are in a first position. [Diagram 35] FIG. 4 is a plan view showing a fixed contact portion, a movable contactor, and a yoke according to one embodiment, with the contacts in a second position. [Diagram 36] 10A and 10B are diagrams illustrating a state in which an arc moves toward a protruding portion in an electromagnetic relay according to an embodiment. [Figure 37] 6A and 6B are diagrams illustrating a state in which an arc moves toward a protruding portion in an electromagnetic relay according to a first modified example. [Figure 38] 13 is a perspective view of a main fixed contact portion according to a second modified example, as viewed from a first obliquely upward direction. FIG. [Figure 39] 13 is a perspective view of a main fixed contact portion according to a second modified example, as viewed from a second obliquely upward direction. FIG. [Diagram 40] FIG. 11 is a front view showing a main fixed contact portion according to a second modified example. [Diagram 41] FIG. 11 is a rear view showing a main fixed contact portion according to a second modified example. [Diagram 42] FIG. 11 is a side view showing a main fixed contact portion according to a second modified example. [Diagram 43] FIG. 11 is a plan view showing a main fixed contact portion according to a second modified example. [Diagram 44] FIG. 11 is a perspective view of a main contact portion according to a second modified example, as viewed from a first obliquely upward direction. [Diagram 45] FIG. 11 is a perspective view of a main fixed contact portion according to a third modified example, as viewed from a first obliquely upward direction. [Figure 46] 13 is a perspective view of a main fixed contact portion according to a third modified example, as viewed from a second obliquely upward direction. FIG. [Figure 47] FIG. 13 is a front view showing a main fixed contact portion according to a third modified example. [Figure 48] FIG. 13 is a rear view showing a main fixed contact portion according to a third modified example. [Figure 49]FIG. 13 is a side view showing a main fixed contact portion according to a third modified example. [Figure 50] FIG. 13 is a plan view showing a main fixed contact portion according to a third modified example. [Figure 51] FIG. 11 is a perspective view of a main contact portion according to a third modified example, as viewed from a first obliquely upward direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the drawings. In the following, the vertical axis, front-rear axis, and width axis of the electromagnetic relay 1 are defined in a state in which the pull-out terminal 414 is pulled out from the housing 10 to the lower side of the vertical axis. The vertical axis, front-rear axis, and width axis are merely defined for the sake of convenience in order to explain each configuration, and do not define the actual arrangement state of the electromagnetic relay 1. In addition, the vertical axis, front-rear axis, and width axis are imaginary configurations, and do not mean that the electromagnetic relay 1 actually has an axis portion such as the vertical axis.

[0014] The direction in which a pair of main fixed contacts (a pair of fixed contacts) are arranged side by side is referred to as the Y axis (first axis: width axis: longitudinal direction of the movable contactor). An axis intersecting the Y axis is referred to as the X axis (second axis: front-rear axis: direction in which the main fixed contacts and main movable contacts face each other). An axis intersecting the Y axis and the X axis is referred to as the Z axis (third axis).

[0015] In this embodiment, the axis extending along the Z axis in the three-dimensional orthogonal coordinate system is the up-down axis, the axis extending along the X axis is the front-rear axis, and the axis extending along the Y axis is the width axis. That is, the axis perpendicular to the width axis (direction extending along the Y axis) is the front-rear axis (direction extending along the X axis), and the axis perpendicular to the width axis (direction extending along the Y axis) and the front-rear axis (direction extending along the X axis) is the up-down axis (direction extending along the Z axis).

[0016] In addition, the lower side of the up-down axis will be defined as the first end side of the Z axis (third axis), and the upper side will be defined as the second end side of the Z axis (third axis). Furthermore, the side where the main fixed contact is located will be defined as the front on the front-rear axis, and the side where the main movable contact is located will be defined as the rear on the front-rear axis.

[0017] As shown in Fig. 1 and Fig. 2, the electromagnetic relay 1 according to this embodiment includes a housing 10 formed of a resin material in a hollow box shape. 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 parallelepiped shaped. In addition, when the case 120 is attached to the base 110, an internal space S1 is formed within the housing 10. Note that the shape of the outer surface of the housing 10 is not limited to a rectangular parallelepiped shape, and may be any shape.

[0018] An electromagnetic device (drive unit) 20 is disposed rearward on the front-rear axis (X-axis: second axis) in the internal space S1 of the housing 10, and a main contact unit 40 is disposed forward of the front-rear axis (X-axis: second axis). Furthermore, an auxiliary contact unit 60 is disposed rearward of the front-rear axis (X-axis: second axis) in the internal space S1 of the housing 10 and above (on the second end side) the up-down axis (Z-axis: third axis).

[0019] In this embodiment, the main contact unit 40 is a so-called normally open contact unit whose contact is off in the initial state, and the auxiliary contact unit 60 is a so-called normally closed contact unit whose contact is on in the initial state. It is also possible to make the main contact unit 40 a so-called normally closed contact unit whose contact is on in the initial state, and the auxiliary contact unit 60 a so-called normally open contact unit whose contact is off in the initial state.

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

[0021] A step is formed on the periphery of the opening at the upper end of the peripheral wall 112, and the outer periphery is smaller than that at the lower end. A pair of protrusions 112a are arranged side by side along the width axis (the direction extending from left to right) on each of the front and rear faces of the peripheral wall 112 above the step.

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

[0023] Case 120 includes a top wall 121 having a generally rectangular plate shape extending along a generally horizontal plane (a plane intersecting with the Z-axis: the XY plane), and a peripheral wall 122 extending from the periphery of top wall 121 downward (first end) along the vertical axis (Z-axis: third axis) (see Figures 3 to 5).

[0024] The peripheral wall 122 includes a front wall 1221 located in front of the front-rear axis (X-axis: second axis) and extending along the width axis (Y-axis: first axis) and the up-down axis (Z-axis: third axis). The peripheral wall 122 includes a rear wall 1222 located behind the front-rear axis (X-axis: second axis) and extending along the width axis (Y-axis: first axis) and the up-down axis (Z-axis: third axis). The peripheral wall 122 includes a pair of side walls 1223 connected to the front wall 1221 and the rear wall 1222 on both sides of the width axis (Y-axis: first axis) and extending along the front-rear axis (X-axis: second axis) and the up-down axis (Z-axis: third axis).

[0025] Furthermore, at the lower part of each of the front wall 1221 and the rear wall 1222, a pair of insertion holes 122a, into which the protrusions 112a of the base 110 are inserted when the case 120 is attached to the base 110, are arranged side by side along the width axis (direction extending left and right).

[0026] In this embodiment, the base 110 includes a first side wall 131 that is connected to rise upward from the bottom surface 111a of the base portion 111 and extends along the width axis (Y axis: first axis). The base 110 also includes a pair of second side walls 132 that are connected to both ends of the width axis (Y axis: first axis) of the first side wall 131 toward the rear of the front-rear axis (X axis: second axis). The pair of second side walls 132 also extend to rise upward from the bottom surface 111a of the base portion 111. The first side wall 131 and the pair of second side walls 132 that extend to rise upward from the bottom surface 111a of the base portion 111 hold the yoke 240 of the electromagnetic device 20, and surround three sides (at least a part) of the side surface 210a of the coil 210.

[0027] In this manner, in this embodiment, the electromagnet device 20 is arranged behind the first side wall 131. The main contact portion 40 is arranged in front of the first side wall 131 (see FIGS. 2 to 4). That is, in this embodiment, the electromagnet device 20 and the main contact portion 40 are arranged in the internal space S1, partitioned into front and rear by the first side wall 131.

[0028] Further, a protruding wall 113 is formed in front of the first side wall 131 of the base 110, and this protruding wall 113 ensures a creeping distance between a pair of main fixed contact portions 410, 410 which will be described later.

[0029] In addition, the base 110 is formed with a raising member 114 for providing a gap between the base 110 and a printed circuit board when the electromagnetic relay 1 is disposed on the printed circuit board (not shown).

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

[0031] For example, a conductive wire can be used as the coil 210. In this embodiment, the coil 210 is disposed in the internal space S1 of the housing 10 with the base 110 positioned below the case 120 such that the axial direction of the coil 210 extends along the up-down axis (Z axis: third axis).

[0032] The coil bobbin 220 is made of resin, which is an insulating material, and has a cylindrical tubular portion 221 extending along the vertical axis (Z axis: third axis: axial direction of the coil) formed in the center of the coil bobbin 220. A through hole 2211 is formed inside the tubular portion 221, penetrating vertically.

[0033] The coil bobbin 220 is connected to the upper end of the cylindrical portion 221 around whose outer surface the coil 210 is wound, and is provided with a substantially rectangular upper flange portion (upper brim portion) 222 that protrudes radially outward from the cylindrical portion 221. The coil bobbin 220 is connected to the lower end of the cylindrical portion 221, and is provided with a substantially rectangular lower flange portion (lower brim portion) 223 that protrudes radially outward from the cylindrical portion 221.

[0034] Further, in this embodiment, the upper flange portion 222 is formed with an upper auxiliary contact holder 2221 for holding the auxiliary contact portion 60. The upper auxiliary contact holder 2221 is formed at both ends of the width axis (Y axis: first axis) at the rear end of the front-rear axis (X axis: second axis) of the upper flange portion 222. Each upper auxiliary contact holder 2221 is formed with a press-fit opening 2221a that opens to the outside of the width axis (Y axis: first axis) and into which press-fit pieces 6141a, 6241a of the auxiliary contact portion 60, which will be described later, are press-fitted (see FIGS. 6 to 8). Around the press-fit opening 2221a in the upper auxiliary contact holder 2221, a restricting wall 2221b is formed for restricting the removal and rotation of the press-fit pieces 6141a, 6241a (see FIGS. 6 to 8).

[0035] On the other hand, the lower flange portion 223 is formed with a lower auxiliary contact holder 2231 for holding the auxiliary contact portion 60. In this embodiment, the lower flange portion 223 is formed so that the rear end side of the front-rear axis (X axis: second axis) is wider than the front end side, and the lower auxiliary contact holders 2231 are formed on both ends of the width axis (Y axis: first axis) at the front end side of this wider portion. In addition, each lower auxiliary contact holder 2231 is formed with a press-fit opening 2231a that opens to the outside of the width axis (Y axis: first axis) and into which press-fit pieces 6143a, 6243a of the auxiliary contact portion 60, which will be described later, are press-fitted (see Figs. 6 to 8). Then, around the press-fit opening 2231a in the lower auxiliary contact holder 2231, a restricting wall 2231b that restricts the press-fit pieces 6143a, 6243a from coming off or rotating is formed (see Figs. 6 to 8).

[0036] The electromagnetic device 20 also 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 disposed inside the coil 210.

[0037] Iron core 230 includes a substantially cylindrical shaft portion 231 extending along the vertical axis (Z axis: third axis), and a substantially cylindrical head portion 232 formed with a larger diameter than shaft portion 231 and connected to the upper end of shaft portion 231 (see FIG. 8).

[0038] The electromagnetic device 20 also includes a yoke 240 arranged around the coil 210 wound around the cylindrical portion 221. In this embodiment, the yoke 240 is a substantially plate-like member made of a magnetic material and has a substantially L-shape in side view (as viewed along the Y-axis). That is, the yoke 240 includes a vertical wall portion (standing portion) 241 arranged 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 extended from the lower end of the vertical wall portion 241 to extend rearward (see FIG. 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 the 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 Figs. 3 and 4). A pair of protruding portions (extensions) 2411 that protrude upward are formed on both ends of the width axis (Y-axis: first axis) of the vertical wall portion (standing portion) 241 of the yoke 240, and the armature 310 is arranged between the pair of protruding portions (extensions) 2411.

[0040] Furthermore, the electromagnetic device 20 includes a pair of coil terminals 250 to which both ends of the coil 210 are connected, respectively, and the electromagnetic device 20 is driven by passing electricity through the coil 210 via the pair of coil terminals 250. In this embodiment, the coil terminal 250 is fixed to the coil bobbin 220 with a tip (connection piece) 251 protruding downward (outward: first end side) of the vertical axis (Z axis: third axis) from the housing 10. Specifically, the coil terminal 250 is held in a pair of coil terminal holding grooves 223a formed in a pair of extension portions 2232, respectively (see FIG. 8).

[0041] By switching the driving state of the electromagnet device 20, the moving member 30 is caused to move.

[0042] In this embodiment, the moving member 30 includes an armature 310 arranged to face the head 232 of the iron core 230 along the vertical axis (Z axis: third axis), and a hinge spring 320 attached across the armature 310 and the yoke 240.

[0043] The armature 310 is made of a conductive metal, and is arranged so as to be able to swing along a vertical axis (Z-axis: third axis) relative to the head 232 of the iron core 230 depending on whether the coil 210 is excited or de-excited.

[0044] In this embodiment, the armature 310 includes a horizontal wall portion 311 that faces the head 232 of the iron core 230 along the up-down axis (Z-axis: third axis), and a vertical wall portion 312 that extends downward from the front end of the horizontal wall portion 311 along the front-rear axis (X-axis: second axis) (see Figures 9 and 10).

[0045] The horizontal wall portion 311 of the armature 310 is attached to the upper end of the vertical wall portion 241 so as to be able to swing along the vertical axis (Z axis: third axis), and the armature 310 is able to rotate along the vertical axis (Z axis: third axis) around the portion supported by the yoke 240.

[0046] Specifically, notches 3111 are formed on both ends of the width axis (Y axis: first axis) at the front end of the front-rear axis (X axis: second axis) of the horizontal wall portion 311. The armature 310 is supported by the yoke 240 by inserting the protruding portion (extension portion) 2411 of the yoke 240 into the notches 3111. In this manner, in this embodiment, the notches 3111 are portions of the armature 310 that are supported by the yoke 240.

[0047] Furthermore, in this embodiment, a through hole 313 that penetrates vertically is formed at the front end of the front-rear axis (X-axis: second axis) of the armature 310. A hinge spring 320 is attached across the armature 310 and the yoke 240 in a state where it is inserted into this through hole 313. At this time, the armature 310 is biased by the hinge spring 320 in a direction in which the horizontal wall portion 311 moves away from the head 232 of the iron core 230.

[0048] When a current is applied to the coil 210, the armature 310 is rotated so that the horizontal wall portion 311 approaches the head 232 of the iron core 230. Specifically, when a current is applied to the coil 210, the horizontal wall portion 311 of the armature 310 is attracted to the head 232 of the iron core 230, and the armature 310 is rotated so that the horizontal wall portion 311 approaches the head 232 of the iron core 230. That is, when a current is applied to the coil 210 via the pair of coil terminals 250, the horizontal wall portion 311 of the armature 310 rotates downward on the up-down axis (Z-axis: third axis). At this time, the vertical wall portion 312 connected to the horizontal wall portion 311 rotates forward on the front-rear axis (X-axis: second axis).

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

[0050] In this embodiment, the swing range of the armature 310 is set between an initial position in which the horizontal wall portion 311 is spaced a predetermined distance above the head 232 of the iron core 230, and a contact position in which the horizontal wall portion 311 abuts against the head 232 of the iron core 230.

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

[0052] In this manner, the armature 310 in this embodiment is disposed opposite the head 232 of the iron core 230 via a predetermined gap when the coil 210 is not energized, and oscillates so as to be attracted to the head 232 of the iron core 230 when the coil 210 is energized.

[0053] By switching the driving state of the electromagnet device 20 and swinging the armature 310, it is possible to switch between electrical continuity and non-conductivity between the paired main fixed contact portion (fixed contact portion) 410 and the main movable contact portion (movable contact portion) 420 (which have main contacts that move towards and away from each other).

[0054] In this embodiment, a main contact portion 40 that opens and closes the main contact in response to the energization of the coil 210 is provided in front of the electromagnet device 20.

[0055] The main contact portion 40 includes a main fixed contact portion 410 and a main movable contact portion 420. The main fixed contact portion 410 includes a main fixed contact (fixed contact) 411, and a body portion 412 having the main fixed contact 411. On the other hand, the main movable contact portion 420 includes a main movable contact (movable contact) 421 that moves relative to the main fixed contact 411 and can be brought into contact with and separated from the main fixed contact 411, and a movable contactor 422 that has the main movable contact 421.

[0056] In this embodiment, the main contact portion 40 includes only one pair of a main fixed contact portion 410 and a main movable contact portion 420 (having main contacts that come into contact with and separate from each other) (see FIGS. 6 and 7).

[0057] In this embodiment, a set of a main fixed contact portion 410 and a main movable contact portion 420 having main contacts that come into contact with or separate 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 parts 410 having shapes symmetrical with respect to the XZ plane are used as a pair of main fixed contact parts 410. The two paired main fixed contact parts 410 are fixed to the base 110 (housing 10) in a state separated from each other on the width axis (Y axis: first axis).

[0059] In this embodiment, each main fixed contact portion 410 includes a body portion 412 having one main fixed contact 411 (see FIGS. 6 and 7). The two paired main fixed contact portions 410 are fixed to the base 110 (housing 10) so that the pair of main fixed contacts 411 are arranged side by side along the width axis (Y axis: first axis).

[0060] In this embodiment, a member to be a main fixed contact is inserted into an insertion hole 412a formed so as to penetrate the main body 412 in the plate thickness direction, and the main body 412 is riveted to have the main fixed contact 411 (see FIGS. 14 and 15). Thus, in this embodiment, the main body 412 functions as a fixed-side main contact holder that holds the main fixed contact 411.

[0061] The main fixed contact 411 does not have to be formed on the main body 412 by riveting, and can be formed 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 performing dowel processing on the main body 412. Also, by making the main movable contact 421 contact with a part of the flat surface of the main body 412, it is possible to make a part of the flat surface of the main body 412 function as the main fixed contact.

[0062] The main fixed contact portion 410 is provided with a drawn-out terminal 414 that is drawn out below (to the outside) the base 110 (housing 10) when the main fixed contact portion 410 is fixed to the base 110 (housing 10). The main fixed contact portion 410 is further provided with a terminal connection portion 413 that is connected to the drawn-out terminal 414 below (on the first end side) of the up-down axis with respect to the main fixed contact 411. The main fixed contact portion 410 is fixed to the base 110 (housing 10) with a tip (connection portion) of the drawn-out terminal 414 protruding below (outside) the base 110 (housing 10).

[0063] In this embodiment, the base 110 is formed with an insertion hole 115 penetrating vertically. The tip (connection part: lower end) of the lead-out terminal 414 is inserted into the insertion hole 115 from above. The base 110 is also formed with an inner press-fit groove 116 and an outer press-fit groove 117, and the main fixed contact part 410 is press-fit into the inner press-fit groove 116 and the outer press-fit groove 117. 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 lead-out terminal 414 protruding downward (outward) from the base 110 (see Figs. 14 and 15). The main fixed contact part 410 may be fixed to the base 110 (housing 10) by adhesive or the like.

[0064] At this time, the main fixed contact portion 410 is fixed to the base 110 (housing 10) with the main fixed contact 411 facing rearward of the front-rear axis (X-axis: second axis). That is, the main fixed contact portion 410 is fixed to the base 110 (housing 10) with the surface 410a (front surface: opposing surface: surface opposing the main movable contact portion 420) of the main body portion 412 on which the main fixed contact 411 is formed facing rearward.

[0065] The main fixed contact 411, the main body 412, the terminal connection portion 413 and the lead-out terminal 414 may be made of a conductive material such as a silver-based material or a copper-based material.

[0066] Thus, in this embodiment, the two main fixed contacts 411 are arranged side by side along the Y axis, which is a direction perpendicular to (intersecting with) the direction in which the main fixed contact 411 and the main movable contact 421 move relatively to each other. One of the two main bodies 412 has one main fixed contact 411, and the other body has the other main fixed contact 411.

[0067] On the other hand, one main movable contact portion 420 has one movable contactor 422, and this one movable contactor 422 has a pair of main movable contacts 421 arranged side by side on the width axis (Y axis: first axis) (see Figures 9 and 10).

[0068] In this embodiment, a member to be a main movable contact is inserted into insertion holes 422a formed on both longitudinal sides of the approximately rectangular plate-shaped movable contactor 422 in the plate thickness direction, and riveted. In this manner, the movable contactor 422 has the main movable contact 421 (see Figs. 14 and 15). Thus, in this embodiment, the movable contactor 422 functions as a movable-side main contact holder that holds the main movable contact 421.

[0069] The main movable contact 421 does not have to be formed on the movable contactor 422 by riveting, and can be formed by various methods. For example, it is possible to make the protruding portion of the movable contactor 422 function as the main movable contact by performing dowel processing on the movable contactor 422. Also, by making a configuration in which a part of the flat surface of the movable contactor 422 comes into contact with the main fixed contact 411, it is possible to make a part of the flat surface of the movable contactor 422 function as the main movable contact.

[0070] One main movable contact portion 420 is arranged so as to be located rearward of the two paired main fixed contact portions 410 on the front-rear axis (X-axis: second axis) with the plate thickness direction approximately coinciding with the front-rear axis (X-axis: second axis) and the longitudinal direction approximately coinciding with the width axis (Y-axis: first axis). At this time, the main movable contact portion 420 is arranged so that the main movable contact 421 faces the main fixed contact 411 on the front-rear axis (X-axis: second axis). Specifically, the movable contactor 422 is arranged so that the main movable contact 421 formed on the first end side of the width axis (Y-axis: first axis) faces the main fixed contact 411 of the main fixed contact portion 410 arranged on the first end side of the width axis (Y-axis: first axis) along the front-rear axis (X-axis: second axis). Similarly, the movable contactor 422 is arranged such that the main movable contact 421 formed on the second end side of the width axis (Y axis: first axis) faces the main fixed contact 411 of the main fixed contact portion 410 arranged on the second end side of the width axis (Y axis: first axis) along the front-rear axis (X axis: second axis). In this manner, one main movable contact 421 comes into contact with and separates from one of the two main fixed contacts 411, and the other main movable contact 421 comes into contact with and separates from the other main fixed contact 411. Also, one movable contactor 422 has two main movable contacts 421.

[0071] The main movable contact 421 and the movable contactor 422 can also be made of a conductive material such as a silver-based material or a copper-based material.

[0072] A set consisting of a pair of main fixed contact portions 410 and one main movable contact portion 420 configured in this manner is housed in the internal space S1, forward of the first side wall 131 in the front-to-rear axis (X-axis: second axis) (see Figures 12 to 15).

[0073] Here, the main movable contact portion 420 is arranged so as to be able to swing relatively to the pair of main fixed contact portions 410 along a front-rear axis (X-axis: second axis).

[0074] In this embodiment, the main contact portion 40 is connected to the armature 310 via the movable portion 50. The movable portion 50 is swung along the front-rear axis (X-axis: second axis) in conjunction with the swing of the armature 310, so that the main movable contact portion 420 swings along the front-rear axis (X-axis: second axis) in conjunction with the operation of the movable portion 50. In other words, by holding the main movable contact portion 420 on the movable portion 50, the main movable contact portion 420 swings relatively along the front-rear axis (X-axis: second axis) with respect to the pair of main fixed contact portions 410.

[0075] In this embodiment, the movable part 50 is made of an insulating resin material and includes a holder part 51 having an insertion hole 511 formed at its upper part into which the vertical wall part 312 of the armature 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 contactor 422.

[0076] In this embodiment, a through hole 521 penetrating in the plate thickness direction is formed at the top of the vertical axis (Z axis: third axis) of the movable plate 52. Then, with the upper end of the movable plate 52 inserted into an insertion hole (not shown) formed at the lower end of the holder part 51, a protrusion formed in an insertion hole (not shown) of the holder part 51 is inserted into the through hole 521, so that the movable plate 52 is held by the holder part 51.

[0077] A protrusion 522 protruding rearward is formed in the center of the vertical axis (Z axis: third axis) of the movable plate 52, and an upper through-hole 531 penetrating in the plate thickness direction is formed in the upper part of the vertical axis (Z axis: third axis) of the movable spring 53. The protrusion 522 of the movable plate 52 is inserted into the upper through-hole 531 of the movable spring 53, so that the movable spring 53 is held by the movable plate 52.

[0078] Furthermore, a lower through-hole 532 penetrating in the plate thickness direction is formed below the vertical axis (Z-axis: third axis) of the movable spring 53, and a protrusion 422b protruding rearward is formed in the center of the width axis (Y-axis: first axis) of the movable contactor 422. The protrusion 422b of the movable contactor 422 is inserted into the lower through-hole 532 of the movable spring 53, so that the movable contactor 422 is held by the movable spring 53.

[0079] In this manner, the main contact portion 40 is connected to the armature 310 via the movable portion 50 .

[0080] With this configuration, the main movable contact portion 420 swings along the front-rear axis (X-axis: second axis) relative to the pair of main fixed contact portions 410 in accordance with the swing of the armature 310. Therefore, the main movable contact 421 swings in a circular arc centered on the upper end of the vertical wall portion 312.

[0081] Furthermore, in this embodiment, an auxiliary contact portion 60 is disposed in the internal space S1 of the housing 10 separately from the main contact portion 40. This auxiliary contact portion 60 is disposed in the internal space S1 in a state in which the auxiliary contacts (auxiliary fixed contact 611 and auxiliary movable contact 621) are present at a position rearward of the front-rear axis (X-axis: second axis) and at the upper end side of the coil 210. Specifically, the auxiliary fixed contact 611 and the auxiliary movable contact 621 of the auxiliary contact portion 60 are disposed on the second end side (rear side) of the front-rear axis (X-axis: second axis) from the axis of the coil 210, and are disposed on the upper end side (second end side) in the axial direction of the coil 210 in a state in which the coil 210 is disposed so that the axial direction extends along the up-down axis (Z-axis: third axis) and the tip (connecting piece) 251 of the coil terminal 250 is positioned lower (first end side) than the coil 210.

[0082] The auxiliary contact portion 60 includes an auxiliary fixed contact portion 610 and an auxiliary movable contact portion 620. The auxiliary fixed contact portion 610 includes an auxiliary fixed contact 611, and a first auxiliary contact terminal 612 having the auxiliary fixed contact 611. On the other hand, the auxiliary movable contact portion 620 includes an auxiliary movable contact 621 that moves relative to the auxiliary fixed contact 611 and can be brought into contact with and separated from the auxiliary fixed contact 611, and a second auxiliary contact terminal 622 having the auxiliary movable contact 621.

[0083] In this embodiment, the auxiliary contact portion 60 includes only one pair of an auxiliary fixed contact portion 610 and an auxiliary movable contact portion 620 (having auxiliary contacts that come into contact with and separate from each other) (see FIGS. 6 and 7).

[0084] In this embodiment, a set of an auxiliary fixed contact part 610 and an auxiliary movable contact part 620 having auxiliary contacts that come into contact with and separate from each other is composed of one auxiliary fixed contact part 610 and one auxiliary movable contact part 620. One auxiliary fixed contact part 610 is formed with one auxiliary fixed contact 611, and one auxiliary movable contact part 620 is formed with only one auxiliary movable contact 621 that comes into contact with and separates from one auxiliary fixed contact 611.

[0085] In this embodiment, as described above, the auxiliary fixed contact portion 610 includes the first auxiliary contact terminal 612 having one auxiliary fixed contact 611.

[0086] Moreover, the first auxiliary contact terminal 612 includes an upper piece 613 extending in the width axis (Y-axis: first axis) at the upper end side of the coil 210. The auxiliary fixed contact 611 is formed on this upper piece 613. In this embodiment, a member to be the auxiliary fixed contact is inserted into an insertion hole 613a formed so as to penetrate the upper piece 613 in the plate thickness direction, and the upper piece 613 is riveted to have the auxiliary fixed contact 611 (see FIG. 11). Thus, in this embodiment, the upper piece 613 functions as a fixed side auxiliary contact holder that holds the auxiliary fixed contact 611.

[0087] The auxiliary fixed contact 611 does not have to be formed on the upper piece 613 by riveting, and can be formed by various methods. For example, it is possible to make a protruding portion of the upper piece 613 function as the auxiliary fixed contact by performing dowel processing on the upper piece 613. It is also possible to make a part of the flat surface of the upper piece 613 function as the auxiliary fixed contact by making the auxiliary movable contact 621 contact with a part of the flat surface of the upper piece 613. It is also possible to provide a plurality of auxiliary fixed contacts 611 on the upper piece 613 (first auxiliary contact terminal 612).

[0088] The first auxiliary contact terminal 612 is connected to the outer end of the width axis (Y axis: first axis) of the upper piece 613, extends along the XZ plane, and has a vertically elongated side piece 614. In this embodiment, the side piece 614 is connected to the upper piece 613 so as to extend downward from the upper piece 613 along the vertical axis (Z axis: third axis), and is disposed to the side of the width axis (Y axis: first axis) of the coil 210.

[0089] The first auxiliary contact terminal 612 also includes a connection piece 615 extending so as to protrude downward from the lower end of the side piece 614. The connection piece 615 is formed so as to protrude downward (outward) from the base 110 in a state in which the side piece 614 is held by the coil bobbin 220 arranged on the base 110.

[0090] The side piece 614 includes a first side piece 6141 connected to the outer end of the width axis (Y axis: first axis) of the upper piece 613, and a connecting portion 6142 extending from the lower end of the first side piece 6141 toward the front of the front-rear axis (X axis: second axis). The side piece 614 includes a second side piece 6143 extending from the lower front end of the connecting portion 6142 toward the bottom of the vertical axis (Z axis: third axis). A connecting piece 615 is connected to the bottom end of the second side piece 6143 so as to protrude downward (outward) from the housing 10. In this embodiment, a tip 6151 of the connecting piece 615 is located lower (first end side) than the coil 210 on the vertical axis (Z axis: third axis).

[0091] Thus, in this embodiment, the side piece 614 comprises a first side piece 6141 connected to the upper piece 613, a second side piece 6143 connected to the connecting piece 615 and positioned forward of the first side piece 6141 on the front-to-rear axis (X-axis: second axis), and a connecting portion 6142 connecting the first side piece 6141 and the second side piece 6143, and has a crank-shaped shape when viewed along the width axis (Y-axis: first axis).

[0092] In this embodiment, the auxiliary fixed contact portion 610 is held by the coil bobbin 220.

[0093] Specifically, a press-fit piece 6141a protruding toward the inside of the width axis (Y axis: first axis) is provided on each end of the front-rear axis (X axis: second axis) of the first side piece 6141. The pair of press-fit pieces 6141a are press-fitted into a pair of press-fit openings 2221a of the upper auxiliary contact holder 2221 formed in the upper flange portion 222.

[0094] A press-fit piece 6143a protruding toward the inside of the width axis (Y axis: first axis) is provided at the lower end of the front end side of the front-rear axis (X axis: second axis) of the second side piece 6143. The press-fit piece 6143a is press-fitted into a press-fit opening 2231a of a lower auxiliary contact holder 2231 formed in the lower flange portion 223.

[0095] In this manner, the auxiliary fixed contact portion 610 is held by the coil bobbin 220 by press-fitting the pair of press-fit pieces 6141a into the pair of press-fit openings 2221a, respectively, and press-fitting the press-fit piece 6143a into the press-fit opening 2231a.

[0096] In this embodiment, the auxiliary fixed contact portion 610 is held by the coil bobbin 220 with the auxiliary fixed contact 611 facing downward along the vertical axis (Z-axis: third axis). That is, the auxiliary fixed contact portion 610 is held by the coil bobbin 220 with the surface of the upper piece 613 on which the auxiliary fixed contact 611 is formed (the lower surface: the surface facing the auxiliary movable contact 621) facing downward.

[0097] Furthermore, the auxiliary fixed contact 611 and the first auxiliary contact terminal 612 can be made of a conductive material, such as a silver-based material or a copper-based material.

[0098] On the other hand, the auxiliary movable contact portion 620 includes the second auxiliary contact terminal 622 having one auxiliary movable contact 621 as described above.

[0099] The second auxiliary contact terminal 622 is provided with an upper piece 623 extending in the width direction (Y-axis: first axis) on the upper end side of the coil 210. An auxiliary movable contact 621 is formed on this upper piece 623.

[0100] In this embodiment, the upper piece 623 includes a substantially rectangular plate-shaped main body 6231 and a leaf spring 6232 that extends horizontally and is elongated along a width axis (Y axis: first axis). The leaf spring 6232 has an auxiliary movable contact 621.

[0101] In this embodiment, the leaf spring 6232 is bent in a crank shape so that the tip (the end on the inner side of the Y-axis) is located downward. A member to be an auxiliary movable contact is inserted into an insertion hole 6232a formed at the tip of the leaf spring 6232 so as to penetrate in the plate thickness direction, and the leaf spring 6232 is made to have the auxiliary movable contact 621 by riveting (see FIG. 11). Thus, in this embodiment, the leaf spring 6232 functions as a movable side auxiliary contact holder that holds the auxiliary movable contact 621.

[0102] The auxiliary movable contact 621 does not have to be formed on the leaf spring 6232 by riveting, and can be formed by various methods. For example, it is possible to make a protruding portion of the leaf spring 6232 function as an auxiliary movable contact by performing dowel processing on the leaf spring 6232. It is also possible to make a part of the flat surface of the leaf spring 6232 function as an auxiliary movable contact by making the auxiliary movable contact 621 contact with a part of the flat surface of the leaf spring 6232. It is also possible to provide a plurality of auxiliary movable contacts 621 on the leaf spring 6232 (upper piece 623: second auxiliary contact terminal 622).

[0103] Moreover, the main body 6231 is connected to the outer end of the width axis (Y axis: first axis) of the leaf spring 6232. Specifically, a pair of insertion holes 6232b are formed in the outer end of the width axis (Y axis: first axis) of the leaf spring 6232 so as to be aligned along the front-rear axis (X axis: second axis). Moreover, the main body 6231 is formed with a pair of protrusions 6231a so as to be aligned along the front-rear axis (X axis: second axis). Then, the pair of protrusions 6231a are inserted into the pair of insertion holes 6232b, respectively, and riveted to connect the leaf spring 6232 to the main body 6231.

[0104] The second auxiliary contact terminal 622 is connected to the outer end of the width axis (Y axis: first axis) of the main body 6231 (upper piece 623), extends along the XZ plane, and includes a vertically elongated side piece 624. In this embodiment, the side piece 624 is connected to the main body 6231 (upper piece 623) so as to extend downward from the main body 6231 (upper piece 623) along the vertical axis (Z axis: third axis), and is disposed to the side of the width axis (Y axis: first axis) of the coil 210.

[0105] The second auxiliary contact terminal 622 also includes a connection piece 625 extending so as to protrude downward from the lower end of the side piece 624. The connection piece 625 is formed so as to protrude downward (outward) from the base 110 in a state in which the side piece 624 is held by the coil bobbin 220 arranged on the base 110.

[0106] The side piece 624 includes a first side piece 6241 connected to the outer end of the width axis (Y axis: first axis) of the main body 6231 (upper piece 623), and a connecting portion 6242 extending from the lower end of the first side piece 6241 toward the front of the front-rear axis (X axis: second axis). The side piece 624 includes a second side piece 6243 extending from the lower front end of the connecting portion 6242 toward the bottom of the vertical axis (Z axis: third axis). A connecting piece 625 is connected to the lower end of the second side piece 6243 so as to protrude downward (outward) from the housing 10. In this embodiment, a tip 6251 of the connecting piece 625 is located lower (first end side) than the coil 210 on the vertical axis (Z axis: third axis).

[0107] Thus, in this embodiment, the side piece 624 comprises a first side piece 6241 connected to the main body portion 6231 (upper piece 623), a second side piece 6243 connected to the connecting piece 625 and positioned forward of the first side piece 6241 on the front-to-rear axis (X-axis: second axis), and a connecting portion 6242 connecting the first side piece 6241 and the second side piece 6243, and has a crank-shaped shape when viewed along the width axis (Y-axis: first axis).

[0108] Furthermore, in this embodiment, the auxiliary movable contact portion 620 is held by the coil bobbin 220 .

[0109] Specifically, press-fit pieces 6241a protruding toward the inside of the width axis (Y axis: first axis) are provided on both ends of the front-rear axis (X axis: second axis) of the first side piece 6241. The pair of press-fit pieces 6241a are press-fitted into a pair of press-fit openings 2221a of the upper auxiliary contact holder 2221 formed in the upper flange portion 222.

[0110] A press-fit piece 6243a protruding toward the inside of the width axis (Y axis: first axis) is provided at the lower end of the front end side of the front-rear axis (X axis: second axis) of the second side piece 6243. The press-fit piece 6243a is press-fitted into a press-fit opening 2231a of the lower auxiliary contact holder 2231 formed in the lower flange portion 223.

[0111] In this manner, the auxiliary movable contact 620 is held by the coil bobbin 220 by press-fitting the pair of press-fit pieces 6241a into the pair of press-fit openings 2221a, respectively, and press-fitting the press-fit piece 6243a into the press-fit opening 2231a.

[0112] In this embodiment, the auxiliary movable contact portion 620 is held by the coil bobbin 220 with the auxiliary movable contact 621 facing upward on the vertical axis (Z-axis: third axis). That is, the auxiliary movable contact portion 620 is held by the coil bobbin 220 with the surface of the leaf spring 6232 on which the auxiliary movable contact 621 is formed (upper surface: the surface facing the auxiliary fixed contact 611) facing upward.

[0113] Moreover, the auxiliary movable contact 621 and the second auxiliary contact terminal 622 can be formed of a conductive material, for example, a silver-based material or a copper-based material.

[0114] A set consisting of one auxiliary fixed contact portion 610 and one auxiliary movable contact portion 620 configured in this way is housed behind the first side wall 131 in the internal space S1 on the front-rear axis (X-axis: second axis) and on the upper end side of the coil 210 (see FIGS. 12 to 15). The auxiliary fixed contact 611 and the auxiliary movable contact 621 are disposed above the head 232 of the iron core 230 on the up-down axis (Z-axis: third axis).

[0115] Here, the auxiliary movable contact portion 620 is arranged so that the leaf spring 6232 can swing relatively along the vertical axis (Z axis: third axis) with respect to the auxiliary fixed contact portion 610. In this embodiment, the auxiliary driving portion 70 is configured to allow the leaf spring 6232 to swing relatively along the vertical axis (Z axis: third axis) with respect to the auxiliary fixed contact portion 610. That is, by switching the driving state of the electromagnet device 20 and swinging the auxiliary driving portion 70, it is possible to switch between electrical continuity and non-conduction between the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 which are paired with each other (having auxiliary contacts which come into contact with and separate from each other).

[0116] In this embodiment, the auxiliary driving unit 70 is made of an insulating resin material, and is held by the horizontal wall portion 311 of the armature 310. The auxiliary driving unit 70 is caused to swing along the vertical axis (Z axis: third axis) in association with the swing of the armature 310. In this manner, the leaf spring 6232 is caused to swing along the vertical axis (Z axis: third axis) in association with the swing of the auxiliary driving unit 70 along the vertical axis (Z axis: third axis).

[0117] The auxiliary driving unit 70 includes a main body 71 and a fixing portion 72 connected to the main body 71 so as to protrude outward along the width axis (Y axis: first axis) and held by the horizontal wall portion 311 of the armature 310. The auxiliary driving unit 70 further includes a push-up portion 73 connected to the main body 71 so as to protrude toward the rear side of the front-rear axis (X axis: second axis) and pushes up the leaf spring 6232.

[0118] In addition, in this embodiment, the fixing portion 72 includes an arm portion 721 that protrudes outward on the width axis (Y axis: first axis), and a hook portion 722 that is connected from the outer end of the arm portion 721 on the width axis (Y axis: first axis) toward the bottom (first end side) of the up-down axis (Z axis: third axis).

[0119] A held portion 3112 for holding the auxiliary driving unit 70 is formed at the rear of the front-rear axis (X-axis: second axis) on the horizontal wall portion 311 of the armature 310. The auxiliary driving unit 70 is held on the horizontal wall portion 311 of the armature 310 by hooking a pair of hook portions 722 onto the held portion 3112.

[0120] In this manner, in this embodiment, the auxiliary drive unit 70 is swung in conjunction with the swinging of the armature 310, thereby making it possible to switch between electrical continuity and non-conduction between the auxiliary fixed contact unit 610 and the auxiliary movable contact unit 620, which have auxiliary contacts that come into contact with and separate from each other. In other words, one end of the armature 310 brings the main contact unit 40 into contact and separates, and the other end of the armature 310 brings the auxiliary contact unit 60 into contact and separates.

[0121] With this configuration, the auxiliary movable contact portion 620 swings relatively along the vertical axis (Z-axis: third axis) with respect to the auxiliary fixed contact portion 610 in accordance with the swing of the armature 310. At this time, the auxiliary movable contact 621 swings to describe an arc centered on the outer end portion of the width axis (Y-axis: first axis) of the leaf spring 6232.

[0122] In this embodiment, the leaf spring 6232 is connected to the second auxiliary contact terminal 622 held by the coil bobbin 220 in a state in which the auxiliary movable contact 621 is separated from the auxiliary fixed contact 611 in a natural state. When the supply of current to the coil 210 is stopped, the push-up portion 73 of the auxiliary drive unit 70 comes into contact with the leaf spring 6232 and is pushed upward, so that the auxiliary movable contact 621 comes into contact with the auxiliary fixed contact 611.

[0123] On the other hand, when the coil 210 is energized, the rear end side of the horizontal wall portion 311 of the armature 310 rotates downward, and the auxiliary driving portion 70 moves downward in accordance with the downward rotation of the rear end side of the horizontal wall portion 311. When the auxiliary driving portion 70 moves downward, the leaf spring 6232 moves downward due to its elastic restoring force, and the auxiliary movable contact 621 moves away from the auxiliary fixed contact 611.

[0124] Alternatively, the auxiliary driving unit 70 may use another method to drive the leaf spring 6232. As another method for the auxiliary driving unit 70 to drive the leaf spring 6232, for example, when the auxiliary driving unit 70 is separated from the leaf spring 6232, the elastic restoring force of the leaf spring 6232 causes the auxiliary movable contact 621 to come into contact with the auxiliary fixed contact 611 to be in a conductive state, and the auxiliary driving unit 70 presses down the leaf spring 6232, causing the auxiliary movable contact 621 to be separated from the auxiliary fixed contact 611 to be in a non-conductive state.

[0125] In this manner, in this embodiment, the auxiliary contact portion 60 is provided so that the ON and OFF states are opposite to those of the main contact portion 40 .

[0126] Next, an example of the operation of the electromagnetic relay 1 having the above-mentioned configuration will be described.

[0127] First, when the coil 210 is not energized, the horizontal wall portion 311 of the armature 310 moves in a direction away from the head portion 232 of the iron core 230 due to the elastic force of the hinge spring 320. At this time, the vertical wall portion 312 of the armature 310 is located behind the front-rear axis (X-axis: second axis), and therefore the movable portion 50 is also located behind the front-rear axis (X-axis: second axis). That is, the main movable contact portion 420 held by the movable portion 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 FIGS. 12 and 14).

[0128] Meanwhile, the auxiliary driving part 70 also moves in a direction away from the head 232 of the iron core 230, so that the leaf spring 6232 is pushed up by the pushing-up part 73 of the auxiliary driving part 70, and the auxiliary movable contact 621 comes into contact with the auxiliary fixed contact 611 (see Figures 12 and 14).

[0129] When the coil 210 is energized from this OFF state, the horizontal wall portion 311 of the armature 310 is attracted downward (toward the iron core 230) by electromagnetic force and moves toward the head portion 232 of the iron core 230 against the elastic force of the hinge spring 320. Then, as the horizontal wall portion 311 rotates downward (toward 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 contactor 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 contactor 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 FIGS. 13 and 15).

[0130] On the other hand, the auxiliary driving part 70 also moves in a direction approaching the head 232 of the iron core 230, so that the push-up part 73 of the auxiliary driving part 70 is lowered downward, and the auxiliary movable contact 621 is separated from the auxiliary fixed contact 611. This causes the electrical connection between the auxiliary fixed contact part 610 and the auxiliary movable contact part 620 to be released (see FIGS. 13 and 15). (See FIGS. 12 and 14).

[0131] In this state, when the current to the coil 210 is stopped, the horizontal wall portion 311 of the armature 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, the vertical wall portion 312 rotates backward in response to the upward rotation of the horizontal wall portion 311, and the movable portion 50 rotates backward in response to the backward rotation of the vertical wall portion 312. As a result, the movable contactor 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 contactor 422 moves away 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.

[0132] On the other hand, auxiliary driving part 70 also moves in a direction away from head 232 of iron core 230, so that leaf spring 6232 is pushed up by push-up part 73 of auxiliary driving part 70 and returns to its initial position. As a result, auxiliary movable contact 621 comes into contact with auxiliary fixed contact 611, and auxiliary fixed contact part 610 and auxiliary movable contact part 620 are electrically connected.

[0133] In this manner, in this embodiment, when the armature 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 with each other, which is the second position (see FIGS. 12 and 14). On the other hand, when the armature 310 is in the abutment position, the main movable contact 421 and the main fixed contact 411 are in contact with each other, and the auxiliary movable contact 621 and the auxiliary fixed contact 611 are in the first position (see FIGS. 13 and 15).

[0134] Therefore, while the coil 210 is not energized, the pair of main fixed contacts 410, 410 are insulated from each other, and while the coil 210 is energized, the pair of main fixed contacts 410, 410 are conductive. In this manner, in this embodiment, the main movable contact 421 is configured to be able to reciprocate (rotate) relative to the main fixed contact 411 along the front-rear axis (X-axis: second axis) between the first position and the second position.

[0135] On the other hand, during a period when the coil 210 is not energized, the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 are insulated, and during a period when the coil 210 is energized, the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 are conductive. In this manner, in this embodiment, the auxiliary movable contact 621 is configured to be able to reciprocate (rotate) relative to the auxiliary fixed contact 611 along the up-down axis (Z-axis: third axis) between the first position and the second position.

[0136] Here, when the main movable contact 421 and the main fixed contact 411 are in contact with each other at the first position, a current I flows through the movable contactor 422 mainly along the longitudinal direction (Y-axis).

[0137] At this time, for example, as shown in Fig. 32, when a current I flows from the main movable contact 421 on the left side (the front side of Fig. 32) to the main movable contact 421 on the right side (the back side of Fig. 32), a magnetic flux B is generated from above downward on the surface 4221 on the side on which the main movable contact 421 of the movable contactor 422 is formed. Note that the surface 4221 on the side on which the main movable contact 421 of the movable contactor 422 is formed refers to the surface located on the side facing the main fixed contact portion 410, and may be referred to as the front surface 4221 or the facing surface 4221 below.

[0138] When the current supply to the coil 210 is stopped, the main movable contact 421 separates from the main fixed contact 411 (moves from the state in FIG. 34 to the state in FIG. 35), which means that opening of the contacts begins.

[0139] When this contact opening starts, in the initial stage of the contact opening, an arc A is generated between the main movable contact 421 and the main fixed contact 411, and the current flow state is continued by the arc A (see FIG. 35).

[0140] In this case, when current I flows from the main movable contact 421 on the right side of Figure 35 to the main movable contact 421 on the left side of Figure 35 (when current flows in the same direction as Figure 32), current I flows from the main movable contact 421 to the main fixed contact 411 in arc A generated between the main movable contact 421 and the main fixed contact 411 on the left side of Figure 35.

[0141] On the other hand, in the arc A generated between the main movable contact 421 and the main fixed contact 411 on the right side of FIG.

[0142] As described above, on the front surface 4221 side of the movable contact 422, that is, in the space in which the arc A exists, magnetic flux B is generated in a downward direction.

[0143] Therefore, arc A generated between main movable contact 421 and main fixed contact 411 on the left side of Figure 35 is subjected to a Lorentz force on the left side (outside the Y-axis) due to current I flowing from main movable contact 421 to main fixed contact 411 and magnetic flux B flowing from above to below.

[0144] As a result, arc A generated between main movable contact 421 and main fixed contact 411 on the left side of FIG. 35 is extended to the left side of FIG. 35 (outside the Y axis).

[0145] In addition, an arc A generated between the main movable contact 421 and the main fixed contact 411 on the right side of Figure 35 is subjected to a Lorentz force on the right side (outside the Y-axis) due to the current I flowing from the main fixed contact 411 to the main movable contact 421 and the magnetic flux B flowing from above to below.

[0146] As a result, arc A generated between main movable contact 421 and main fixed contact 411 on the right side of FIG. 35 is extended to the right side of FIG. 35 (outside the Y-axis).

[0147] Then, the arcs A generated at the main movable contacts 421 and the main fixed contacts 411 are respectively extended outside the Y axis and extinguished. In this way, the current flow between the main fixed contact portion 410 and the main movable contact portion 420 is cut off.

[0148] Although not shown in the figure, when current I flows from the main movable contact 421 on the left side of Figure 35 to the main movable contact 421 on the right side (when current flows in the same direction as in Figure 33), current I flows from the main fixed contact 411 to the main movable contact 421 in the arc A generated between the main movable contact 421 and the main fixed contact 411 on the left side of Figure 35.

[0149] 35. In addition, in the arc A generated between the main movable contact 421 and the main fixed contact 411 on the right side of FIG.

[0150] In this case, as described above, on the front surface 4221 side of the movable contact 422, that is, in the space in which the arc A exists, a magnetic flux B is generated that flows from below to above.

[0151] Therefore, the arc A generated between the main movable contact 421 and the main fixed contact 411 on the left side of Figure 35 is subjected to a Lorentz force on the left side (outside the Y-axis) due to the current I flowing from the main fixed contact 411 to the main movable contact 421 and the magnetic flux B flowing from below to above.

[0152] As a result, arc A generated between main movable contact 421 and main fixed contact 411 on the left side of FIG. 35 is extended to the left side of FIG. 35 (outside the Y axis).

[0153] In addition, an arc A generated between the main movable contact 421 and the main fixed contact 411 on the right side of Figure 35 is subjected to a Lorentz force on the right side (outside the Y-axis) due to the current I flowing from the main movable contact 421 to the main fixed contact 411 and the magnetic flux B flowing from below to above.

[0154] As a result, arc A generated between main movable contact 421 and main fixed contact 411 on the right side of FIG. 35 is extended to the right side of FIG. 35 (outside the Y-axis).

[0155] Arcs A generated at the main movable contacts 421 and the main fixed contacts 411 are then stretched outside the Y axis and extinguished.

[0156] In this way, the electromagnetic relay 1 of this embodiment is configured so that the arc A generated between the main movable contact 421 and the main fixed contact 411 is extended outside the Y axis and extinguished, regardless of the direction of the current.

[0157] Therefore, even when an alternating current flows through the main contact portion 40, as in an AC relay, the arc A generated between the main movable contact 421 and the main fixed contact 411 can be extended outside the Y axis and extinguished.

[0158] At this time, the arc generated between the main movable contact 421 and the main fixed contact 411 is stretched in 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 serves as an arc extension space S4 in which the arc is stretched (see FIG. 5).

[0159] However, when the arc A generated between the main movable contact 421 and the main fixed contact 411 is stretched outward on the width axis (Y axis: first axis), consumable powder and the like may scatter into the arc extension space S4. At this time, if the space S2 in which the main contact portion 40 is disposed and the space S3 in which the auxiliary contact portion 60 is disposed in the internal space S1 of the housing 10 are connected by a large passage, the auxiliary contact portion 60 may be affected by the consumable powder and the like. In particular, in an electromagnetic relay through which a large current flows, the auxiliary contact portion 60 will be significantly affected by the consumable powder and the like.

[0160] Therefore, in the present embodiment, even when a large current flows through the main contact portion 40, it is possible to more reliably prevent the contact reliability of the auxiliary contact portion 60 from decreasing. 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 is present, and an auxiliary contact side space S3 in which the auxiliary contact portion 60 is present. 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 a continuous portion of the partition wall 130.

[0161] The partition 130 allows the main contact side space S2 in which the main contact 40 is arranged and the auxiliary contact side space S3 in which the auxiliary contact 60 is arranged to communicate with each other via a narrower gap. In other words, the partition 130 prevents the contact side space S2 and the auxiliary contact side space S3 from communicating with each other via a relatively wide gap. This more reliably prevents worn powder and the like generated by the main contact 40 from entering the auxiliary contact side space S3 in which the auxiliary contact 60 is located.

[0162] In this embodiment, the partition 130 has a first side wall 131 that is connected to the base 110 so as to extend along the up-down axis (Z-axis: third axis) at the front side (first end side of the second axis) of the front-to-rear axis (X-axis: second axis) of the coil 210.

[0163] The partition 130 also has a pair of second side walls 132 arranged on either side of the width axis (Y axis: first axis) and connected to the base 110 so as to extend along the up-down axis (Z axis: third axis).

[0164] In this manner, in this embodiment, the first side wall 131 and the pair of second side walls 132 for supporting the yoke 240 also function as a partition wall 130 that divides the space into a main contact side space S2 in which the main contact portion 40 is located and an auxiliary contact side space S3 in which the auxiliary contact portion 60 is located.

[0165] In addition, the first side wall 131 is connected to the base 110 so that the main contact portion 40 and the movable portion 50 are located in front of the front-rear axis (X-axis: second axis), and the auxiliary contact portion 60 and the coil 210 are located in the rear of the front-rear axis (X-axis: second axis) (the second end side of the second axis).

[0166] At least a portion of the side surface 210a of the coil 210 is surrounded by the first side wall 131 and the pair of second side walls 132.

[0167] Furthermore, in this embodiment, the partition 130 has a pair of third side walls 133 arranged side by side along the width axis (Y axis: first axis) and aligned along the top-bottom axis (Z axis: third axis) and along the second side wall 132 (see Figures 16 and 17).

[0168] 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 front-rear axis (X-axis: second axis) and the up-down axis (Z-axis: third axis). The third side wall 133 is formed such that the rear end of the front-rear axis (X-axis: second axis) contacts the inner surface of the rear wall 1222.

[0169] Furthermore, the pair of third side walls 133 are formed to overlap at least a part of the contact periphery of the auxiliary contact portion 60 when viewed from a direction perpendicular to the Z-axis. In this way, the arc extension space S4 and the auxiliary contact side space S3 of the main contact side space S2 are divided by the third side walls 133. The third side walls 133 can more reliably prevent worn powder and the like generated in the main contact portion 40 from entering the auxiliary contact side space S3 through the arc extension space S4.

[0170] In this embodiment, the main contact side space S2 is located above the main contact portion 40 and has a substantially L-shaped space when viewed along the width axis (Y axis: first axis). This space serves as an armature arrangement space S5 in which the armature 310 is arranged (see Figs. 14 and 15). Since the armature 310 is arranged in the armature arrangement space S5 in a state in which it is permitted to swing, a relatively large gap is formed between the armature 310 and the case 120 in the armature arrangement space S5. This may cause the armature 310 to shift position when swinging, or cause worn powder and the like generated in the main contact portion 40 to enter the auxiliary contact side space S3 through the relatively large gap formed between the armature 310 and the case 120.

[0171] Therefore, in this embodiment, the partition wall 130 includes a fourth side wall 134 provided on the case 120 so as to protrude below the vertical axis (Z axis: third axis) with the base 110 positioned below the case 120. The fourth side wall 134 is arranged to face the armature 310 above and below while extending along the width axis (Y axis: first axis) (see FIGS. 14 and 15).

[0172] Furthermore, in this embodiment, the fourth side wall 134 is arranged forward (toward the main contact unit 40) of the vertical wall portion (standing portion) 241 of the yoke 240 in the front-rear axis (X-axis: second axis) and has a pressing wall 1341 capable of pressing the armature 310. By providing the pressing wall 1341 on the case 120, the armature 310 is prevented from shifting position when it swings. In addition, since the pressing wall 1341 divides the armature arrangement space S5 into front and rear portions, the pressing wall 1341 can more reliably prevent worn powder and the like generated in the main contact unit 40 from entering the auxiliary contact side space S3.

[0173] Furthermore, the fourth side wall 134 has a partition wall 1342 that is disposed rearward (toward the auxiliary contact portion 60) of the vertical wall portion (standing portion) 241 of the yoke 240 in the front-rear axis (X-axis: second axis) and can divide the space S5 above the armature 310. By providing the partition wall 1342 on the case 120, the partition wall 1342 can prevent consumable powder and the like that cannot be completely prevented by the retaining wall 1341 from entering the auxiliary contact side space S3.

[0174] Furthermore, in this embodiment, the partition 130 has a fifth side wall 135 that extends along the vertical axis (Z axis: third axis) and is provided on the case 120 so as to be positioned outside the second side wall 132 in the width axis (Y axis: first axis).

[0175] In this embodiment, the fifth side wall 135 extends so as to protrude downward from the top wall 121 of the case 120 along the vertical axis (Z axis: third axis). When the case 120 is attached to the base 110, the lower end of the fifth side wall 135 is located in the middle between the base portion 111 of the base 110 and the top wall 121 of the case 120.

[0176] The position of the lower end of the fifth side wall 135 only needs to be located 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 appropriately. By providing the fifth side wall 135 having such a shape, the arc extension space S4 is divided into front and rear portions, so that the fifth side wall 135 can more reliably prevent worn powder and the like generated in the main contact portion 40 from entering the auxiliary contact side space S3.

[0177] In this embodiment, the second side wall 132 has an extension portion 1321 extending outwardly of the width axis (Y axis: first axis). The extension portion 1321 is provided so as to extend from the rear end of the front-rear axis (X axis: second axis) of the second side wall 132 along the width axis (Y axis: first axis) and the up-down axis (Z axis: third axis). In this embodiment, the extension portion 1321 is formed from the lower end to the upper end side (midway to the upper end) of the second side wall 132. That is, the extension portion 1321 is provided continuously with the second side wall 132 in a state in which the upper end of the second side wall 132 protrudes upward beyond the upper end of the extension portion 1321 (see FIGS. 6 and 7).

[0178] Furthermore, when an arc A occurs between the main movable contact 421 and the main fixed contact 411, the main movable contact 421 and the main fixed contact 411 may be welded together by the arc heat. Furthermore, the main movable contact 421 and the main fixed contact 411 may be deteriorated by the arc heat.

[0179] In this way, when arc A occurs between the main movable contact 421 and the main fixed contact 411, the contacts (main movable contact 421 and main fixed contact 411) may be affected by the arc. In particular, in an electromagnetic relay through which a large current flows, the contacts (main movable contact 421 and main fixed contact 411) are significantly affected by the arc.

[0180] Therefore, it is preferable to more reliably and quickly extinguish the arc A that occurs between the main movable contact 421 and the main fixed contact 411, thereby preventing the contacts (the main movable contact 421 and the main fixed contact 411) from being affected by the arc.

[0181] Therefore, in this embodiment, it is possible to more reliably and more quickly extinguish the arc A generated between the main movable contact 421 and the main fixed contact 411. Specifically, a yoke 80 is disposed on at least one of the main body 412 and the movable contactor 422.

[0182] In this way, by arranging the yoke 80 on at least one of the main body portion 412 and the movable contactor 422, the strength of the magnetic flux B generated around the member on which the yoke 80 is arranged (the main body portion 412 or the movable contactor 422) is increased, making it possible to more reliably and quickly extinguish the arc A.

[0183] In this embodiment, as shown in FIG. 24 to FIG. 31, the yoke 80 is disposed on the side of the movable contact 422, which is at least one of the main body portion 412 and the movable contact 422. As shown in FIG.

[0184] The yoke 80 has a portion disposed on a surface 4222 opposite to the side on which the main movable contact 421 of the movable contactor 422 is formed. The surface opposite to the side on which the main movable contact 421 of the movable contactor 422 is formed refers to the surface located opposite to the side facing the main body 412, and may hereinafter be referred to as a back surface 4222.

[0185] In this embodiment, the yoke 80 includes a side wall 81 having a generally rectangular shape elongated in the Y-axis direction, and a top wall 82 connected to the upper end of the side wall 81.

[0186] The front surface 81a of the side wall 81 is disposed to face the rear surface 4222 of the movable contact 422 with the tip 82b of the top wall 82 facing forward along the front-rear axis (X-axis: second axis).

[0187] Therefore, in this embodiment, the side wall 81 of the yoke 80 is a portion that is disposed on the side of the surface 4222 opposite to the side on which the main movable contact 421 of the movable contactor 422 is formed.

[0188] At this time, the side wall 81 of the yoke 80 is positioned so as to overlap with the contact (main movable contact 421) of the component (movable contactor 422) on the side on which the yoke 80 is positioned, when viewed along the X-axis (viewed along the direction in which the main fixed contact 411 and the main movable contact 421 move relative to each other).

[0189] In this embodiment, the yoke 80 has a shape in which a notch 80a is provided in the center of the Y axis, and the length of the Z axis at the center of the Y axis is shorter than both ends of the Y axis. This notch 80a is provided to prevent the yoke 80 from interfering with the movable part 50.

[0190] Furthermore, in this embodiment, the yoke 80 is fixed to the movable contactor 422 (the member on which the yoke 80 is arranged). Specifically, a through hole 80b is formed in a side wall 81 of the yoke 80, and the yoke 80 is fixed to the movable contactor 422 by inserting the protrusion 422b of the movable contactor 422 into the through hole 80b. The yoke 80 may be fixed to the movable contactor 422 by caulking, brazing, adhesive, or the like.

[0191] By fixing the yoke 80 to the movable contact 422, the lower surface 82a of the top wall 82 is brought into surface contact with the upper surface 4223 of the movable contact 422. At this time, the tip 82b of the top wall 82 protrudes forward (outward) beyond the front surface 4221 of the movable contact 422.

[0192] In this embodiment, the yoke 80 is disposed on the movable contact 422, but the yoke 80 may be disposed on the main body portion 412.

[0193] Furthermore, this embodiment is configured so that the arc A generated between the main movable contact 421 and the main fixed contact 411 can be moved away from the main movable contact 421 and the main fixed contact 411 more quickly.

[0194] 18 to 23, a protruding portion 417 that protrudes toward the movable contactor 422 is formed on the main body 412. At this time, the protruding portion 417 is formed so as to be located rearward (on the movable contactor 422 side) of the tip (top) 411a of the main fixed contact 411.

[0195] In this embodiment, the main fixed contact portion 410 has an outer extension portion 415 that is arranged outside between the main fixed contacts 411 that are arranged side by side along the width axis. The protrusion portion 417 is connected to the outer extension portion 415.

[0196] Here, in this embodiment, the protruding portion 417 has a first portion 4171 that protrudes upward (toward the second end) of the up-down axis from the upper surface (end surface) 415c of the outer extension portion 415. The protruding portion 417 also has a second portion 4173 that protrudes toward the main movable contact 421 side with respect to the front surface (opposing surface: the surface facing the main movable contact portion 420) of the main fixed contact portion 410. The protruding portion 417 also has a curved portion 4172 that connects the first portion 4171 and the second portion 4173.

[0197] Such a protrusion 417 can be formed, for example, by bending the upper part of a plate-shaped member that protrudes above the up-down axis (second end side) from the upper surface (end surface) 415c of the outer extension portion 415 180 degrees toward the rear of the front-rear axis.

[0198] In this manner, in this embodiment, the protrusion 417 is bent up and down at a portion outside the conductive portion (portion through which current flows between the lead-out terminal 414 and the main fixed contact 411) of the main fixed contact portion 410. Furthermore, the protrusion 417 is formed outwardly between a pair of main fixed contacts 411 arranged side by side along the Y axis.

[0199] In this way, a protrusion 417 is formed near the outside between the main fixed contacts 411, and the arc A that is generated when the contacts are opened can be quickly moved from the main movable contacts 421 and the main fixed contacts 411 to the protrusion 417.

[0200] In this embodiment, the plate thickness of the main fixed contact portion 410 is increased to allow a large current to flow through the electromagnetic relay 1. Therefore, when the protrusion is formed by bending both ends of the width axis of the main fixed contact portion 410, it is necessary to provide a large notch in the current-carrying portion of the main fixed contact portion 410 in order to make the bending process of the protrusion easier while reducing the width dimension of the main fixed contact portion 410. If a large notch is provided in the current-carrying portion of the main fixed contact portion 410, the width of the current-carrying portion of the main fixed contact portion 410 becomes narrower than when no notch is provided, making it difficult to pass a large current.

[0201] In contrast to this, in this embodiment, unlike the case where protrusions are formed on both ends of the width axis of the main fixed contact portion 410, the protrusions 417 are formed without providing a notch in the conductive portion of the main fixed contact portion 410. Specifically, the protrusions 417 are formed in a portion of the main fixed contact portion 410 that is separated from the conductive portion.

[0202] The terminal connection portion 413 extends along the width axis so as to be present at least between an inner end 417a (end on the main fixed contact 411 side) of the width axis of the protrusion 417 and the main fixed contact 411. In this embodiment, the terminal connection portion 413 extends along the width axis so as to be present between an outer end 417b of the width axis of the protrusion 417 and the main fixed contact 411.

[0203] This makes it possible to form the protrusion 417 on the main fixed contact portion 410 without narrowing the width of the current-carrying portion of the main fixed contact portion 410 (reducing the terminal cross-sectional area of ​​the current-carrying portion). Furthermore, by increasing the terminal cross-sectional area of ​​the current-carrying portion of the main fixed contact portion 410, it becomes possible to more reliably suppress heat generation caused by a large current.

[0204] In this way, in this embodiment, even if the plate thickness of the main fixed contact portion 410 is increased, it is possible to more reliably prevent the main movable contact 421 and the main fixed contact 411 from being affected by the arc A that occurs when the contacts are opened, while ensuring the terminal cross-sectional area of ​​the conductive portion.

[0205] In this embodiment, the first portion 4171 and the second portion 4173 are connected by a U-shaped curved portion 4172. The second portion 4173 faces the outer extension portion 415 at the front and rear.

[0206] In this way, the protrusion 417 can be formed simply by bending the plate 180 degrees, and the protrusion 417 can be formed more easily. If the first portion 4171 and the second portion 4173 are connected by a U-shaped curved portion 4172, the protrusion 417 can be brought closer to the main fixed contact 411 more easily. Furthermore, if the protrusion 417 is formed by bending the plate 180 degrees, the amount of protrusion of the protrusion 417 protruding rearward of the front-rear axis (X-axis: second axis) can be determined by setting the plate thickness, and therefore the amount of protrusion of the protrusion 417 can be controlled more easily.

[0207] Furthermore, in this embodiment, the width W1 of the curved portion 4172 along the Y axis is set to be smaller than the length L1 connecting the curved apex 4172a of the curved portion 4172 and the lower end (tip) 4173a of the second portion 4173. This makes it easier to bend the plate at the portion that becomes the protruding portion 417.

[0208] Also, the second portion 4173 and the main fixed contact 411 are arranged side by side along the width axis. That is, the protruding portion 417 is formed so that the top and bottom positions of the second portion 4173 and the main fixed contact 411 are substantially the same. This makes the second portion 4173 and the main fixed contact 411 face each other along the width axis, which is the direction in which the arc A is extended. This makes it possible to more easily and reliably move the arc A generated when the contacts are opened from the main movable contact 421 or the main fixed contact 411 to the protruding portion 417 quickly.

[0209] Furthermore, a notch 4152 is formed on the inner side of the first portion 4171 in the outer extension portion 415 on the width axis. In this embodiment, the notch 4152 is formed so as to be located above the main fixed contact 411 on the up-down axis. This reduces the amount of raw material required to form the main fixed contact portion 410 by punching the raw material.

[0210] Furthermore, in this embodiment, the main fixed contact portion 410 is disposed between the main fixed contacts 411 and includes an inner extension portion 416 that faces the main movable contact portion 420 along the front-rear axis. When the main fixed contact portion 410 is fixed to the base 110 (housing 10), the inner extension portion 416 is press-fitted into the inner press-fit groove 116 formed in the base 110, and the outer extension portion 415 is press-fitted into the outer press-fit groove 117. At this time, the inner press-fit groove 116 is provided with a press-fit protrusion 116a that protrudes along the front-rear axis, and the inner extension portion 416 is press-fitted into the inner press-fit groove 116 by the press-fit protrusion 116a. Similarly, the outer press-fit groove 117 is provided with a press-fit protrusion 117a that protrudes along the front-rear axis, and the outer extension portion 415 is press-fitted into the outer press-fit groove 117 by the press-fit protrusion 117a.

[0211] Therefore, in this embodiment, when the main fixed contact portion 410 is fixed to the base 110 (housing 10), both sides (front surface 416a and back surface 416b) of the end portion 4161 of the inner extension portion 416 contact the housing 10, and both sides (front surface 415a and back surface 415b) of the end portion 4151 of the outer extension portion 415 contact the housing 10.

[0212] This makes it possible to further improve the positioning accuracy of the main fixed contact portion 410 to the housing 10. This makes it possible to more accurately determine the contact gap when the main movable contact 421 and the main fixed contact 411 are in the second position, and also makes it possible to ensure the contact pressure when the main movable contact 421 and the main fixed contact 411 are in the first position. In addition, since both sides of the width axis of the main fixed contact portion 410 are press-fitted and fixed to the housing 10, the main fixed contact portion 410 can be more firmly fixed to the housing 10.

[0213] Furthermore, in this embodiment, a movable-side protrusion 4224 that protrudes toward the main body 412 is formed at the end of the width axis (Y axis: first axis) of the movable contactor 422.

[0214] In this embodiment, the end of the Y-axis of a roughly rectangular plate-shaped member that is elongated along the Y-axis is bent forward (towards the main body portion 412) so that a movable side protrusion 4224 is formed on the movable contactor 422.

[0215] At this time, the movable-side protrusion 4224 is formed so that the tip 4224a of the movable-side protrusion 4224 is located forward (on the body part 412 side) of the tip (top) 421a of the main movable contact 421.

[0216] Furthermore, in this embodiment, the movable side protrusion 4224 is positioned more inward on the width axis (Y axis: first axis) than the protrusion 417 (see FIG. 34).

[0217] Furthermore, by giving the main body 412 and the movable contactor 422 the shapes described above, when an arc A occurs between the main movable contact 421 and the main fixed contact 411, the arc A's firing point (discharge point) A1 is moved to the protrusion 417 side and the movable side protrusion 4224 side on the main movable contact 421 side and the main fixed contact 411 side.

[0218] Specifically, the Lorentz force acts on the outside of the Y axis on the arc A generated between the main movable contact 421 and the main fixed contact 411, stretching it outwardly about the Y axis, causing the arc A generated between the main movable contact 421 and the main fixed contact 411 to move toward the protrusion 417 and the movable side protrusion 4224.

[0219] In this embodiment, since the movable side protrusion 4224 is positioned further inward on the Y axis than the protrusion 417, the arc A that moves toward the protrusion 417 side and the movable side protrusion 4224 side is extended outward on the Y axis and rearward on the X axis.

[0220] Therefore, in this embodiment, as shown in FIG. 36, when the main body 412 and the movable contact 422 are accommodated within the housing 10, a space is formed outside the Y axis of the protrusion 417 and the movable side protrusion 4224 and behind the X axis.

[0221] This makes it possible to more reliably prevent the housing 10 and the members contained within the housing 10 from being affected by the arc A that is stretched outward along the Y axis and rearward along the X axis.

[0222] As shown in FIG. 37, the movable side protrusion 4224 may be positioned further outward on the Y axis than the protrusion 417.

[0223] For example, when the main body 412 and the movable contact 422 are accommodated within the housing 10, if a space is formed outside the Y axis of the protrusion 417 and the movable side protrusion 4224 and in front of the X axis, the configuration shown in Figure 37 is preferable.

[0224] In this embodiment, the protrusions are provided on both the main body 412 and the movable contact 422, but the protrusions may be provided only on the main body 412.

[0225] Furthermore, the shape of the protrusion 417 is not limited to the shape described in the above embodiment, but may be various shapes.

[0226] For example, a main fixed contact portion 410 shown in Figs. 38 to 44 may be used.

[0227] In the main fixed contact portion 410 shown in FIGS. 38 to 44, the plate protruding upward from the upper surface (end surface) 415c of the outer extension portion 415 is also bent 180 degrees to form the protruding portion 417.

[0228] Then, a tapered portion 4174 is formed in the second portion 4173, which narrows (the width along the Y axis narrows) toward the tip (lower end). Specifically, when the main fixed contact portion 410 is viewed along the front-rear axis, the side of the second portion 4173 closer to the main fixed contact 411 on the inside of the width axis (the fixed contact portion side) is inclined to be higher on the up-down axis as it approaches the inside of the width axis (the fixed contact portion side). In this way, the tapered portion 4174 is formed in the second portion 4173.

[0229] Such a configuration makes it possible to miniaturize the device while ensuring a contact gap (the distance required to maintain better insulation when the contacts are open) between the main fixed contact portion 410 and the main movable contact portion 420.

[0230] Moreover, it is also possible to use the main fixed contact portion 410 shown in Figs.

[0231] 45 to 51, the plate protruding upward from the upper surface (end surface) 415c of the outer extension portion 415 is bent 90 degrees to form the protruding portion 417. At this time, the tip 4173a of the second portion 4173 is positioned rearward (toward the movable contactor 422) of the tip (top) 411a of the main fixed contact 411.

[0232] Also, a notch 4152 is formed in the outer extension 415 on the inside of the first portion 4171 in the width axis so that its lower end is at approximately the same position as the center of the up-down axis of the main fixed contact 411. This allows the first portion 4171 and the main fixed contact 411 to be arranged side by side along the width axis. Since the up-down positions of the first portion 4171 and the main fixed contact 411 can be approximately at the same positions, the second portion 4173 and the main fixed contact 411 can be opposed to each other along the width axis, which is the direction in which the arc A is extended, without having to bend the plate of the portion that becomes the protrusion 417 180 degrees.

[0233] The second portion 4173 formed by bending the plate 90 degrees is arranged in a state where it is lined up with the main fixed contact 411 along the width axis. That is, the protruding portion 417 is formed so that the top and bottom positions of the second portion 4173 and the main fixed contact 411 are substantially the same. In this way, the second portion 4173 and the main fixed contact 411 are opposed to each other along the width axis, which is the direction in which the arc A is stretched. This also makes it possible to more easily and reliably move the arc A generated when the contacts are opened from the main movable contact 421 or the main fixed contact 411 to the protruding portion 417 quickly.

[0234] In addition, in the main fixed contact portion 410 shown in Figures 45 to 51, when viewed along the front-to-rear axis, the side of the second portion 4173 closer to the main fixed contact 411 can be inclined so that the inside of the width axis (the fixed contact portion side) is above the up-down axis.

[0235] [Actions and Effects] The following describes the characteristic configurations of the electromagnetic relays shown in the above embodiment and the modified examples thereof, and the effects obtained thereby.

[0236] (1) The electromagnetic relay 1 shown in the above embodiment and its modified example includes a housing 10 and a pair of main fixed contact sections (fixed contact sections) 410, each having one main fixed contact (fixed contact) 411. The electromagnetic relay 1 also includes a main movable contact section (movable contact section) 420, each having a pair of main movable contacts (movable contacts) 421 that face the main fixed contact 411. The electromagnetic relay 1 also includes a pair of drawn-out terminals 414 that are respectively connected to the main fixed contact sections 410 and drawn out to the outside of the housing 10, and an electromagnet device (drive section) 20 that brings the main movable contact 421 into contact with and separates it from the main fixed contact 411.

[0237] A pair of main fixed contact portions (fixed contact portions) 410 are arranged such that the main fixed contacts (fixed contacts) 411 are aligned along the width axis (Y axis: first axis). A main movable contact portion (movable contact portion) 420 extends along the width axis (Y axis: first axis), and a pair of main movable contacts (movable contacts) 421 face the main fixed contacts (fixed contacts) 411 along a front-rear axis (X axis: second axis) that intersects with the width axis (Y axis: first axis).

[0238] Moreover, the main fixed contact portion 410 has an outer extension portion 415 disposed outward between a pair of main fixed contacts 411 arranged to be aligned along the width axis (Y axis: first axis). Moreover, the main fixed contact portion 410 has a terminal connection portion 413 connected to a pull-out terminal 414 below (on the first end side) the up-down axis (Z axis: third axis) intersecting with the width axis (Y axis: first axis) and the front-rear axis (X axis: second axis) relative to the main fixed contacts 411. Furthermore, the main fixed contact portion 410 has a protrusion portion 417 connected to the outer extension portion 415.

[0239] Here, the protruding portion 417 has a first portion 4171 that protrudes upward (to the second end side) of the up-down axis (Z-axis: third axis) from the upper surface (end surface) 415c of the outer extension portion 415. The protruding portion 417 also has a second portion 4173 that protrudes toward the main movable contact 421 side with respect to the front surface (opposing surface: surface facing the main movable contact portion 420) of the main fixed contact portion 410. The protruding portion 417 also has a curved portion 4172 that connects the first portion 4171 and the second portion 4173.

[0240] In this way, in the electromagnetic relay 1 shown in the above embodiment and its modified example, a shape bent up and down is formed in a portion of the main fixed contact portion 410 that is separated from the current-carrying portion (the portion through which current flows between the draw-out terminal 414 and the main fixed contact 411). The shape bent up and down forms the protrusion 417. In this way, the protrusion 417 is formed near the outside between the main fixed contacts 411, and the arc A that is generated when the contacts are opened can be quickly moved from the main movable contact 421 or the main fixed contact 411 to the protrusion 417.

[0241] With this configuration, there is no need to provide a notch in the current-carrying portion of the main fixed contact portion 410, as in the case of forming protrusions on both sides of the width axis of the main fixed contact portion 410. Therefore, it becomes possible to form the protrusion 417 on the main fixed contact portion 410 without narrowing the width of the current-carrying portion of the main fixed contact portion 410 (reducing the terminal cross-sectional area of ​​the current-carrying portion).

[0242] In this way, according to the above embodiment and its modified examples, an electromagnetic relay 1 can be obtained that can more reliably prevent the main movable contact 421 and the main fixed contact 411 from being affected by the arc A that is generated when the contacts are opened, while ensuring the terminal cross-sectional area of ​​the current-carrying part.

[0243] This effect is more pronounced when a large current flows through the electromagnetic relay, because the thickness of the main fixed contact 410 needs to be increased in order to make the relay an electromagnetic relay through which a large current flows, and when the thickness is increased, a larger cutout needs to be provided in order to bend the plate.

[0244] (2) The first portion 4171 and the second portion 4173 may be connected by a U-shaped curved portion 4172. The second portion 4173 may face the outer extension portion 415 along the front-rear axis (X-axis: second axis).

[0245] In this way, the protrusion 417 can be formed simply by bending the plate 180 degrees, and the protrusion 417 can be formed more easily. Furthermore, if the first portion 4171 and the second portion 4173 are connected by the U-shaped curved portion 4172, the protrusion 417 can be brought closer to the main fixed contact 411 more easily. In this way, the arc A generated when the contacts are opened can be moved quickly from the main movable contact 421 or the main fixed contact 411 to the protrusion 417 more easily and reliably.

[0246] (3) The width W 1 of the curved portion 4172 may be smaller than the length L 1 connecting the curved apex 4172 a of the curved portion 4172 and the tip 4173 a of the second portion 4173 .

[0247] In this way, the plate at the portion that will become protrusion 417 can be bent more easily, so that protrusion 417 can be formed more easily.

[0248] (4) The second portion 4173 and the main fixed contact 411 may be arranged to be aligned along the width axis (Y axis: first axis).

[0249] This makes it possible to make the second portion 4173 and the main fixed contact 411 approximately in the same vertical position. That is, the second portion 4173 and the main fixed contact 411 can be opposed to each other along the width axis, which is the direction in which the arc A is extended. As a result, it becomes possible to more easily and reliably move the arc A, which is generated when the contacts are opened, quickly from the main movable contact 421 or the main fixed contact 411 to the protruding portion 417.

[0250] (5) The first portion 4171 and the main fixed contact 411 may be arranged to be aligned along the width axis (Y axis: first axis).

[0251] In this way, the top and bottom positions of the first portion 4171 and the main fixed contact 411 can be made substantially the same. Therefore, even if the plate of the portion that becomes the protrusion 417 does not need to be bent 180 degrees, the second portion 4173 and the main fixed contact 411 can be made to face each other along the width axis, which is the direction in which the arc A is stretched. Therefore, the arc A generated when the contacts are opened can be moved quickly from the main movable contact 421 or the main fixed contact 411 to the protrusion 417 more easily and reliably.

[0252] (6) Furthermore, a notch 4152 may be formed in the outer extension portion 415 on the inside of the first portion 4171 in the width axis (Y axis: first axis).

[0253] In this way, the material for forming the main fixed contact portion 410 can be reduced, and the weight and cost of the device can be reduced. In addition, by forming the notch 4152 on the inner side of the width axis from the first portion 4171 in the outer extension portion 415, even if the plate of the portion that becomes the protrusion 417 is bent 90 degrees, the second portion 4173 and the main fixed contact 411 can be made to face each other along the width axis in which the arc A is stretched. Therefore, the arc A generated when the contacts are opened can be moved quickly from the main movable contact 421 or the main fixed contact 411 to the protrusion 417 more easily and reliably.

[0254] (7) In addition, the terminal connection portion 413 may extend along the width axis (Y axis: first axis) so as to be located at least between the inner end (end on the fixed contact side) 417a of the width axis (Y axis: first axis) of the protrusion 417 and the main fixed contact 411.

[0255] This allows the terminal cross-sectional area of ​​the current-carrying portion of main fixed contact portion 410 to be increased, making it possible to more reliably suppress heat generation caused by a large current.

[0256] (8) Furthermore, the main movable contact portion 420 may have movable-side protrusions 4224 that protrude toward the main fixed contact portion 410 from both ends of the width axis (Y axis: first axis).

[0257] This makes it possible to more reliably prevent the main movable contact 421 and the main fixed contact 411 from being affected by the arc A that occurs when the contacts are opened.

[0258] (9) Furthermore, when viewed along the front-to-rear axis (X-axis: second axis), the side of the second portion 4173 closer to the main fixed contact 411 on the inside (fixed contact side) of the width axis (Y-axis: first axis) may be inclined to be upper (second end side) of the up-down axis (Z-axis: third axis) as it moves toward the inside (fixed contact side) of the width axis (Y-axis: first axis).

[0259] This makes it possible to miniaturize the device while ensuring a contact gap between the main fixed contact portion 410 and the main movable contact portion 420 (the distance required to maintain better insulation when the contacts are open).

[0260] (10) Furthermore, the main fixed contact portion 410 may further include an inner extension portion 416 that is disposed between the main fixed contacts 411 and faces the main movable contact portion 420 along the front-rear axis (X-axis: second axis). Both surfaces (front surface 416a and back surface 416b) of an end portion 4161 of the inner extension portion 416 may be in contact with the housing 10, and both surfaces (front surface 415a and back surface 415b) of an end portion 4151 of the outer extension portion 415 may be in contact with the housing 10.

[0261] This makes it possible to further improve the positioning accuracy of the main fixed contact portion 410 on the housing 10. Therefore, it is possible to more accurately determine the contact gap when the main movable contact 421 and the main fixed contact 411 are in the second position, and it is also possible to ensure the contact pressure when the main movable contact 421 and the main fixed contact 411 are in the first position.

[0262] [others] Although the electromagnetic relay according to the present disclosure has been described above, it is not limited to the description, and it will be obvious to those skilled in the art that various modifications and improvements are possible.

[0263] For example, it is possible to appropriately combine the configurations shown in the above-described embodiment and the modified examples thereof.

[0264] In the above embodiment and its modified example, the auxiliary contact unit 60 is set to the OFF state when the main contact unit 40 is set to the ON state, but it is also possible for the auxiliary contact unit 60 to be set to the ON state when the main contact unit 40 is set to the ON state. In this case, the main contact unit 40 and the auxiliary contact unit 60 can be so-called normally closed contact units whose contacts are ON in the initial state, or the main contact unit 40 and the auxiliary contact unit 60 can be so-called normally open contact units whose contacts are OFF in the initial state.

[0265] Furthermore, in the above embodiment and the modified example, the electromagnetic relay 1 including the auxiliary contact portion 60 is exemplified, but the electromagnetic relay 1 not including the auxiliary contact portion 60 may also be used.

[0266] In addition, the fixed contact portion, the movable contact portion, and other detailed specifications (shape, size, layout, etc.) can also be changed as appropriate. [Explanation of symbols]

[0267] 1 Electromagnetic relay 10. Housing 20 Electromagnetic device (drive unit) 410 Main fixed contact section (fixed contact section) 410a Front (the surface facing the movable contact portion) 411 Main fixed contact (fixed contact) 413 Terminal connection part 414 Output terminal 415 Outer extension 415a Front (both sides) 415b Back (both sides) 415c Top surface (end surface) 4151 End 4152 Notch 416 Inner extension 416a Front (both sides) 416b Back (both sides) 4161 End 417 Protrusion 417a Inside edge 4171 Part 1 4172 Curved section 4172a curved top 4173 Part 2 4173a Tip 420 Main movable contact section (movable contact section) 421 Main movable contact (movable contact) 4224 Movable side protrusion W1 Width of curved section L1: The length between the top of the curved part and the tip of the second part X Anteroposterior axis (second axis) Y width axis (1st axis) Z vertical axis (3rd axis)

Claims

1. Housing and A pair of fixed contact portions each having one fixed contact; a movable contact portion having a pair of movable contacts facing the fixed contacts, respectively; a pair of lead-out terminals connected to the fixed contact portions and led out to the outside of the housing; a drive unit that moves the movable contact point toward and away from the fixed contact point; Equipped with A pair of the fixed contact portions are arranged such that the fixed contacts are aligned along a first axis, the movable contact portion extends along the first axis, and the pair of movable contacts face the fixed contacts respectively along a second axis intersecting the first axis, The fixed contact portion is an outer extension portion disposed outwardly between the pair of fixed contacts arranged in line along the first axis; a terminal connection portion connected to the lead terminal at a first end side of a third axis that intersects with the first axis and the second axis with respect to the fixed contact; a protrusion coupled to the outer extension; having The protrusion is a first portion protruding from an end surface of the outer extension portion toward a second end of the third shaft; a second portion protruding toward the movable contact portion from a surface of the fixed contact portion facing the movable contact portion; a curved portion connecting the first portion and the second portion; having Electromagnetic relay.

2. The first portion and the second portion are connected by the U-shaped curved portion, the second portion faces the outer extension along the second axis; 2. An electromagnetic relay as claimed in claim 1.

3. The width of the curved portion is smaller than the length connecting the curved apex of the curved portion and the tip of the second portion.

3. An electromagnetic relay according to claim 1 or 2.

4. The second portion and the fixed contact are arranged to be aligned along the first axis. An electromagnetic relay according to any one of claims 1 to 3.

5. The first portion and the fixed contact are arranged to be aligned along the first axis. An electromagnetic relay according to any one of claims 1 to 4.

6. A notch is formed in the outer extension portion on the inside of the first axis relative to the first portion. An electromagnetic relay according to any one of claims 1 to 5.

7. the terminal connection portion extends along the first axis so as to be present at least between an end of the protruding portion on the fixed contact side of the first axis and the fixed contact; An electromagnetic relay according to any one of claims 1 to 6.

8. The movable contact portion has movable-side protrusions protruding from both ends of the first shaft toward the fixed contact portion. An electromagnetic relay according to any one of claims 1 to 7.

9. When viewed along the second axis, a side of the first axis in the second portion that is closer to the fixed contact is inclined toward the second end side of the third axis as it approaches the fixed contact side of the first axis. An electromagnetic relay according to any one of claims 1 to 8.

10. the fixed contact portion further includes an inner extension portion disposed between the fixed contacts and facing the movable contact portion along the second axis; Both surfaces of an end of the inner extension contact the housing, and both surfaces of an end of the outer extension contact the housing. An electromagnetic relay according to any one of claims 1 to 9.

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