Electromagnetic relay

Abstract

To increase an insulation distance between a conductive component, which is electrically connected to a contact device, and a coil.SOLUTION: An upper flange 62 of a bobbin 22 includes: a first wall 64 provided on a first side along a second axis A2; and a second wall 65 provided on a second side along a second axis A2 to face the first wall 64 at a third axis A3. The first wall 64 has a first recess 643 which is recessed along the first axis. The second wall 65 has a second recess 653 which is recessed along the first axis. A case 9 includes: a first ridge 961 at least a part of which faces the first wall 64 at the third axis A3; and a first connection part 962 which is connected to the first ridge 961 and at least a part of which is inserted into the first recess 643. The case 9 further includes: a second ridge 971 at least a part of which faces the second wall 65 at the third axis A3; and a second connection part 972 which is connected to the second ridge 971 and at least a part of which is inserted into the second recess 653.SELECTED DRAWING: Figure 15

Description

Technical Field

[0001] The present disclosure generally relates to electromagnetic relays, and more particularly to electromagnetic relays including a contact device having fixed contacts and movable contacts, and an electromagnet device including a coil.

Background Art

[0002] Patent Document 1 discloses an electromagnetic relay. This electromagnetic relay is composed of an electromagnetic relay body and a cover covering the electromagnetic relay body. The electromagnetic relay body includes an electromagnetic block having a coil and a movable contact spring that swings by a current flowing through the coil, two fixed contact terminals each having a fixed contact, a backstop having two movable contact abutting portions, and a base block holding the electromagnetic block, the fixed contact terminals, and the backstop.

[0003] The yoke of the electromagnetic block is formed in a substantially L shape, and the tip of the long side installed parallel to the base portion of the base block is formed to be bifurcated. The movable contact spring of the electromagnetic block is a conductive strip member elastically deformably bent into a substantially L shape, and a plate-shaped armature attracted by magnetic force is fixed inside a middle region of one side thereof.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In an electromagnetic relay, it may be desirable to increase the insulation distance between a conductive component electrically connected to a contact device and a coil.

[0006] An object of the present disclosure is to provide an electromagnetic relay capable of increasing an insulation distance between a conductive component and a coil that are electrically connected to a contact device.

Means for Solving the Problem

[0007] The electromagnetic relay according to one aspect of the present disclosure includes a coil, a bobbin, an iron core, a fixed contact portion, a movable spring, and a case. The coil is wound around the bobbin. The iron core is inserted vertically into the bobbin along a first axis. The fixed contact portion has a fixed contact. The movable spring has a movable contact that faces the fixed contact along the first axis. The movable spring moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact separates from the fixed contact in response to switching between excitation and non-excitation of the coil. The case houses the coil, the bobbin, the fixed contact, and the movable contact inside. At least a part of the main circuit components electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin. The bobbin includes a main body portion around which the coil is wound and an upper flange portion provided at an upper portion of the main body portion. The upper flange portion includes a first wall portion provided on a first side along a second axis intersecting the first axis and a second wall portion provided on a second side along the second axis and facing the first wall portion on a third axis intersecting the first axis and the second axis. The first wall portion has a first recess recessed along the first axis. The second wall portion has a second recess recessed along the first axis. The case includes a case main body that constitutes an outer contour of the case. The case includes a first protrusion portion that at least partially faces the first wall portion on the third axis and a first connection portion that is connected to the first protrusion portion and at least partially inserted into the first recess. The case includes a second protrusion portion that at least partially faces the second wall portion on the third axis and a second connection portion that is connected to the second protrusion portion and at least partially inserted into the second recess. The first wall portion and the second wall portion are asymmetric in top view. An electromagnetic relay according to an aspect of the present disclosure includes a coil, a bobbin, an iron core, a fixed contact portion, a movable spring, and a case. The coil is wound around the bobbin. The iron core is inserted vertically into the bobbin along a first axis. The fixed contact portion has a fixed contact. The movable spring has a movable contact that faces the fixed contact along the first axis. The movable spring moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact separates from the fixed contact in response to switching between excitation and non-excitation of the coil. The case houses the coil, the bobbin, the fixed contact, and the movable contact inside. At least a part of the main circuit components electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin. The bobbin includes a main body portion around which the coil is wound and an upper flange portion provided on an upper portion of the main body portion. The upper flange portion includes a first wall portion provided on a first side along a second axis intersecting the first axis and a second wall portion provided on a second side along the second axis and facing the first wall portion on a third axis intersecting the first axis and the second axis. The first wall portion has a first recess recessed along the first axis. The second wall portion has a second recess recessed along the first axis. The case includes a case body that constitutes an outer contour of the case. The case includes a first protrusion portion that at least partially faces the first wall portion on the third axis and a first connection portion that is connected to the first protrusion portion and at least partially inserted into the first recess. The case includes a second protrusion portion that at least partially faces the second wall portion on the third axis and a second connection portion that is connected to the second protrusion portion and at least partially inserted into the second recess. The fixed contact and the movable contact are provided above the bobbin. An electromagnetic relay according to one aspect of the present disclosure includes a coil, a bobbin, a core, a fixed contact portion, a movable spring, and a case. The coil is wound around the bobbin. The core is inserted vertically into the bobbin along a first axis. The fixed contact portion has a fixed contact. The movable spring has a movable contact that faces the fixed contact along the first axis. The movable spring moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact separates from the fixed contact in response to switching between excitation and non-excitation of the coil. The case houses the coil, the bobbin, the fixed contact, and the movable contact inside. At least a part of the main circuit components electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin. The bobbin includes a main body portion around which the coil is wound and an upper flange portion provided on an upper portion of the main body portion. The upper flange portion includes a first wall portion provided on a first side along a second axis intersecting the first axis and a second wall portion provided on a second side along the second axis and facing the first wall portion on a third axis intersecting the first axis and the second axis. The first wall portion has a first recess recessed along the first axis. The second wall portion has a second recess recessed along the first axis. The case includes a case body that constitutes an outer contour of the case. The case includes a first protrusion portion at least a part of which faces the first wall portion on the third axis and a first connection portion connected to the first protrusion portion and at least a part of which is inserted into the first recess. The case includes a second protrusion portion at least a part of which faces the second wall portion on the third axis and a second connection portion connected to the second protrusion portion and at least a part of which is inserted into the second recess. A lower end of the first protrusion portion of the case is located below an upper surface of the core. An upper end of the first wall portion of the bobbin is located above the upper surface of the core. An electromagnetic relay according to one aspect of the present disclosure includes a coil, a bobbin, a core, a fixed contact portion, a movable spring, and a case. The coil is wound around the bobbin. The core is inserted vertically into the bobbin along a first axis. The fixed contact portion has a fixed contact. The movable spring has a movable contact that faces the fixed contact along the first axis. The movable spring moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact separates from the fixed contact in response to switching between excitation and non-excitation of the coil. The case houses the coil, the bobbin, the fixed contact, and the movable contact inside. At least a part of the main circuit components electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin. The bobbin includes a main body portion around which the coil is wound and an upper flange portion provided on an upper portion of the main body portion. The upper flange portion includes a first wall portion provided on a first side along a second axis intersecting the first axis and a second wall portion provided on a second side along the second axis and facing the first wall portion on a third axis intersecting the first axis and the second axis. The first wall portion has a first recess recessed along the first axis. The second wall portion has a second recess recessed along the first axis. The case includes a case main body that constitutes an outer contour of the case. The case includes a first protrusion portion that at least partially faces the first wall portion on the third axis and a first connection portion that is connected to the first protrusion portion and at least partially inserted into the first recess. The case includes a second protrusion portion that at least partially faces the second wall portion on the third axis and a second connection portion that is connected to the second protrusion portion and at least partially inserted into the second recess. A lower end of the first protrusion portion contacts an upper surface of the upper flange portion of the bobbin on the first axis. An upper end of the first wall portion is separated from the case on the first axis.

Advantages of the Invention

[0008] According to the present disclosure, there is an advantage that it is possible to provide an electromagnetic relay capable of increasing the insulation distance between a conductive component and a coil electrically connected to a contact device.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

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Figure 4

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Figure 9

Figure 10

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Figure 12

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Figure 15

Figure 16

Figure 17

Figure 18

DETAILED DESCRIPTION OF THE INVENTION

[0010] The electromagnetic relay according to the embodiment of the present disclosure will be described with reference to the drawings. Each figure described in the following embodiments is a schematic figure, and the ratio of the size and thickness of each component in the figure does not necessarily reflect the actual dimensional ratio.

[0011] (1) Overview As shown in FIGS. 2 to 6, FIG. 10, and FIG. 15, the electromagnetic relay 100 of the present embodiment includes a coil 21, a bobbin 22, a core 23, a fixed contact portion 400, a movable spring 31, and a case 9. The coil 21 is wound around the bobbin 22. The core 23 is inserted vertically into the bobbin 22 along a first axis A1. The fixed contact portion 400 has a fixed contact F1. The movable spring 31 has a movable contact M1 that faces the fixed contact F1 along the first axis A1. The movable spring 31 moves between a closed position where the movable contact M1 contacts the fixed contact F1 and an open position where the movable contact M1 separates from the fixed contact F1 in response to switching between energization and non-energization of the coil 21. The case 9 houses the coil 21, the bobbin 22, the fixed contact F1, and the movable contact M1 inside. At least a part of the main circuit components electrically connected to the fixed contact portion 400 and the movable spring 31 is disposed above the bobbin 22. The bobbin 22 includes a main body portion 61 around which the coil 21 is wound and an upper flange portion 62 provided on the upper portion of the main body portion 61. The upper flange portion 62 includes a first wall portion 64 provided on a first side along a second axis A2 that intersects the first axis A1 and a second wall portion 65 provided on a second side along the second axis A2 and facing the first wall portion 64 at a third axis A3 that intersects the first axis A1 and the second axis A2. The first wall portion 64 has a first recess 643 recessed along the first axis A1. The second wall portion 65 has a second recess 653 recessed along the first axis A1. The case 9 includes a case main body 90 that constitutes the outer contour of the case 9. The case 9 includes a first protrusion portion 961 that at least partially faces the first wall portion 64 at the third axis A3 and a first connection portion 962 that is connected to the first protrusion portion 961 and at least partially inserted into the first recess 643. The case 9 includes a second protrusion portion 971 that at least partially faces the second wall portion 65 at the third axis A3 and a second connection portion 972 that is connected to the second protrusion portion 971 and at least partially inserted into the second recess 653.

[0012] In the electromagnetic relay 100 of the present embodiment, the first connection portion 962 of the case 9 is inserted into the first recess 643 of the first wall portion 64 of the upper flange portion 62 of the bobbin 22, and the first rib portion 961 of the case 9 faces the first wall portion 64. Further, in the electromagnetic relay 100, the second connection portion 972 of the case 9 is inserted into the second recess 653 of the second wall portion 65 of the upper flange portion 62 of the bobbin 22, and the second rib portion 971 of the case 9 faces the second wall portion 65. Therefore, it is possible to increase the insulation distance between the fixed contact portion 400 and the movable spring 31 and the coil 21 by the first rib portion 961 and the first wall portion 64 (or the second rib portion 971 and the second wall portion 65). As a result, in the electromagnetic relay 100 of the present embodiment, it is possible to increase the insulation distance between the conductive component electrically connected to the contact device including the movable contact M1 and the fixed contact F1 and the coil 21.

[0013] Further, in the electromagnetic relay 100 of the present embodiment, it is possible to position the case 9 with respect to the bobbin 22 by the first recess 643 of the first wall portion 64 and the first connection portion 962 of the case 9 and / or the second recess 653 of the second wall portion 65 and the second connection portion 972 of the case 9.

[0014] Further, in the electromagnetic relay 100 of the present embodiment, it is possible to suppress the excessive movement of the contact terminal 33 due to an external impact, and it is possible to suppress the deformation of the movable spring 31 fixed to the contact terminal 33.

[0015] (2) Details Hereinafter, the electromagnetic relay 100 of the present embodiment will be described in detail with reference to the drawings.

[0016] The electromagnetic relay 100 is a so-called hinge type relay. The electromagnetic relay 100 includes a contact device including a movable contact M1 and a fixed contact F1, and a coil 21. The conductive component electrically connected to the contact device and the conductive component electrically connected to the coil 21 are electrically insulated.

[0017] The electromagnetic relay 100 is mounted on, for example, an electric vehicle. The electromagnetic relay 100 is used, for example, for the purpose of turning on and off the circuit of the charging cable of the electric vehicle. The contact device is inserted into the circuit of the charging cable.

[0018] As shown in FIGS. 1 and 2, the electromagnetic relay 100 includes a relay body 1 and a case 9.

[0019] As shown in FIGS. 2 to 4, the relay body 1 is configured by coupling a plurality of blocks. The relay body 1 includes an electromagnet block 2, a movable block 3, and a fixed block 4, which are coupled to form the relay body 1. Hereinafter, the combination of the electromagnet block 2 and the movable block 3 may be referred to as a main body block 10 (see FIG. 3).

[0020] As shown in FIGS. 3 and 4, the main body block 10 includes a coil 21, an iron core 23 inserted inside the coil 21, and a contactor 33.

[0021] Hereinafter, the virtual axis along which the iron core 23 extends is also referred to as a first axis A1. The contactor 33 is arranged along the iron core 23 along the first axis A1. Also, the virtual axis along which the main body block 10 and the fixed block 4 are arranged side by side is also referred to as a second axis A2. The second axis A2 intersects the first axis A1 and is orthogonal here. Also, the virtual axis that intersects both the first axis A1 and the second axis A2 is also referred to as a third axis A3. Here, the third axis A3 is orthogonal to both the first axis A1 and the second axis A2. Also, on the first axis A1, the side where the contactor 33 is located as viewed from the iron core 23 is also referred to as "up", and on the first axis A1, the side where the iron core 23 is located as viewed from the contactor 33 is also referred to as "down". Also, on the second axis A2, the side where the fixed block 4 is located as viewed from the main body block 10 is also referred to as "left", and on the second axis A2, the side where the main body block 10 is located as viewed from the fixed block 4 is also referred to as "right". Also, both sides on the third axis A3 are respectively referred to as "front" and "rear".

[0022] In addition, in the present disclosure, "top view" means viewing from above along the first axis A1, "side view" means viewing from the right or left along the second axis A2, and "front view" means viewing from the front along the third axis A3.

[0023] As shown in FIG. 3, the fixed block 4 is assembled to the main body block 10 from the left side along the second axis A2 and fixed to the main body block 10. In the present disclosure, "fixed" can include both meanings of being detachably fixed by fitting or the like and being non-detachably fixed by adhesion, welding, or the like.

[0024] (2.1) Electromagnet block As shown in FIGS. 4 and 5, the electromagnet block 2 includes a coil 21, a bobbin 22, an iron core 23, an insulating member 24, a yoke 25, and two coil terminals 26.

[0025] As shown in FIG. 5, the bobbin 22 has a main body portion 61, an upper flange portion 62 provided on the upper part of the main body portion 61, and a lower flange portion 63 provided on the lower part of the main body portion 61. The main body portion 61, the upper flange portion 62, and the lower flange portion 63 are integrally formed as a molded body of an electrically insulating synthetic resin.

[0026] The main body portion 61 is a hollow cylindrical shape whose axis is along the first axis A1. The coil 21 is wound around the main body portion 61. The axis of the coil 21 (the virtual axis around which the winding of the coil 21 is wound) substantially coincides with the axis of the main body portion 61.

[0027] As shown in FIGS. 5 and 6, the upper flange portion 62 includes an upper flange main body 621 having a substantially rectangular plate shape in top view. The upper flange main body 621 has a circular hole 622 communicating with the internal space of the main body portion 61 at a position to the left of its center. An annular support base portion 623 protruding upward is provided around the hole 622 on the upper surface of the upper flange main body 621.

[0028] The upper flange portion 62 includes a first wall portion 64, a second wall portion 65, and a third wall portion 66 on the upper surface of the upper flange main body 621.

[0029] The first wall portion 64 is provided along the first side (front side) along the second axis A2 in the upper flange main body 621. The first wall portion 64 protrudes upward from the upper surface of the upper flange main body 621. The first wall portion 64 is continuously formed along the second axis A2. The first wall portion 64 is provided at a position overlapping with an imaginary line extending forward along the third axis A3 from the center of the hole 622 of the upper flange main body 621.

[0030] The first wall portion 64 includes a base portion 641 formed on the upper surface of the upper flange main body 621 and a protruding rib 642 formed on the upper surface of the base portion 641. The base portion 641 is substantially rectangular parallelepiped-shaped extending along the second axis A2. The protruding rib 642 is substantially protruding-strip-shaped extending along the second axis A2.

[0031] The thickness of the protruding rib 642 (dimension along the third axis A3) is thinner than the thickness of the base portion 641. The front surface (outer surface) of the base portion 641 and the front surface of the protruding rib 642 are flush (in the same plane). Therefore, there is a step between the rear surface (inner surface) of the protruding rib 642 and the base portion 641.

[0032] The length of the protruding rib 642 (dimension along the second axis A2) is shorter than the length of the base portion 641. On the second axis A2, the protruding rib 642 is located substantially at the center of the upper surface of the base portion 641. Therefore, there is a step between the left side surface of the protruding rib 642 and the base portion 641, and there is a step between the right side surface of the protruding rib 642 and the base portion 641. A concave portion (first concave portion 643) is formed in the step between the base portion 641 and the protruding rib 642. Thus, the first wall portion 64 has a first concave portion 643 recessed along the first axis A1. The first wall portion 64 has two first concave portions 643 located at both ends (left end and right end) of the first wall portion 64 on the second axis A2 as the first concave portion 643.

[0033] The second wall portion 65 is provided along the second side (rear side) along the second axis A2 in the upper flange main body 621. The second wall portion 65 protrudes upward from the upper surface of the upper flange main body 621. The second wall portion 65 is continuously formed along the second axis A2. The second wall portion 65 is provided at a position overlapping with an imaginary line extending rearward along the third axis A3 from the center of the hole 622 of the upper flange main body 621.

[0034] The second wall portion 65 faces the first wall portion 64 across the hole 622 on the third axis A3. In a top view, the first wall portion 64 and the second wall portion 65 are symmetric.

[0035] The second wall portion 65 includes a base portion 651 formed on the upper surface of the upper flange main body 621 and a protruding rib 652 formed on the upper surface of the base portion 651. The base portion 651 is substantially rectangular parallelepiped-shaped extending along the second axis A2. The protruding rib 652 is substantially protruding-strip-shaped extending along the second axis A2.

[0036] The thickness (dimension along the third axis A3) of the protruding rib 652 is thinner than the thickness of the base portion 651. The rear surface (outer surface) of the base portion 651 and the rear surface of the protruding rib 652 are flush (in the same plane). Therefore, there is a step between the front surface (inner surface) of the protruding rib 652 and the base portion 651.

[0037] The length (dimension along the second axis A2) of the protruding rib 652 is shorter than the length of the base portion 651. On the second axis A2, the protruding rib 652 is located substantially at the center of the upper surface of the base portion 651. Therefore, there is a step between the left side surface of the protruding rib 652 and the base portion 651, and there is a step between the right side surface of the protruding rib 652 and the base portion 651. A concave portion (second concave portion 653) is formed in the step between the base portion 651 and the protruding rib 652. Thus, the second wall portion 65 has a second concave portion 653 recessed along the first axis A1. The second wall portion 65 has two second concave portions 653 located at both ends (left end and right end) of the second wall portion 65 on the second axis A2 as the second concave portion 653.

[0038] The third wall portion 66 is provided along the third axis A3 on the upper surface of the upper flange main body 621. The third wall portion 66 is provided along the third side (left side) along the third axis A3 of the upper flange main body 621. The third wall portion 66 protrudes upward from the upper surface of the upper flange main body 621. The third wall portion 66 is located on the left side of the hole 622.

[0039] The third wall portion 66 is substantially rectangular parallelepiped-shaped extending along the third axis A3. The height of the third wall portion 66 (dimension along the first axis A1) is substantially equal to the height of the base portion 641 of the first wall portion 64 and substantially equal to the height of the base portion 651 of the second wall portion 65.

[0040] The third wall portion 66 connects between the first end (left end) of the first wall portion 64 and the first end (left end) of the second wall portion 65. More specifically, the third wall portion 66 connects between the rear surface of the first end (left end) of the base portion 641 of the first wall portion 64 and the front surface of the first end (left end) of the base portion 651 of the second wall portion 65. The third wall portion 66 is continuously formed along the third axis A3. In the upper flange portion 62, the first wall portion 64, the second wall portion 65, and the third wall portion 66 form a C shape in a top view.

[0041] As shown in FIGS. 5 and 6, the upper flange portion 62 further includes a protruding plate portion 624, a holding protrusion 625, and a positioning portion 626.

[0042] The protruding plate portion 624 is plate-shaped and protrudes leftward along the second axis A2 from the third side (left piece) of the upper flange main body 621. The protruding plate portion 624 is in the same planar shape as the upper flange main body 621.

[0043] The holding protrusion 625 is provided on the upper surface of the protruding plate portion 624. The holding protrusion 625 is a rib extending along the second axis A2 at a position near the front end on the upper surface of the protruding plate portion 624. One end of the holding protrusion 625 is connected to the left side surface of the third wall portion 66.

[0044] The positioning portion 626 is a protrusion provided along the third axis A3 on the upper surface of the upper flange main body 621. The positioning portion 626 is provided along the fourth side (right side) along the third axis A3 of the upper flange main body 621. The length of the positioning portion 626 (dimension along the third axis A3) is shorter than the length of the fourth side (right side) of the upper flange main body 621. The positioning portion 626 is provided at the center of the fourth side (right side) of the upper flange main body 621 on the third axis A3. The first end (front end) of the positioning portion 626 and the second end (right end) of the first wall portion 64 are not connected and there is a gap therebetween. The second end (rear end) of the positioning portion 626 and the second end (right end) of the second wall portion 65 are not connected and there is a gap therebetween.

[0045] As shown in FIGS. 5 and 7, the lower flange portion 63 includes an upper wall portion 631, a lower wall portion 632, a front wall portion 633, a rear wall portion 634, and a left wall portion 635. The lower flange portion 63 is formed in a hollow rectangular box shape. The lower flange portion 63 has an opening on one side surface (right side surface) of the second axis A2. That is, the lower flange portion 63 is provided with an opening 630 on the right side surface.

[0046] The upper wall portion 631 is in the shape of a plate that is substantially rectangular in top view. The upper wall portion 631 has a circular hole 636 at its center that connects the internal space of the main body portion 61 and the internal space of the lower flange portion 63.

[0047] The lower wall portion 632 is in the shape of a plate that is substantially rectangular in top view. The lower wall portion 632 has a circular hole 637 at its center that connects the internal space of the lower flange portion 63 and the external space. In top view, the center of the hole 637 of the lower wall portion 632 substantially coincides with the center of the hole 636 of the upper wall portion 631.

[0048] The lower wall portion 632 is longer in length (dimension along the second axis A2) than the upper wall portion 631. In top view, the right end of the lower wall portion 632 protrudes to the right of the right end of the upper wall portion 631.

[0049] On the lower surface of the lower wall portion 632, an engaging protrusion 638 that protrudes downward is provided at the center of the third axis A3 at its left end.

[0050] The front wall portion 633 and the rear wall portion 634 are plate-shaped and substantially rectangular when viewed from the front. The front wall portion 633 connects between the front edge of the upper wall portion 631 and the front edge of the lower wall portion 632. The rear wall portion 634 connects between the rear edge of the upper wall portion 631 and the rear edge of the lower wall portion 632.

[0051] The left wall portion 635 is plate-shaped and substantially rectangular when viewed from the side. The left wall portion 635 connects between the left edge of the upper wall portion 631 and the left edge of the lower wall portion 632.

[0052] The lower flange portion 63 has two holding grooves 639 for attaching two coil terminals 26 respectively at both ends (front end portion and rear end portion) of the third axis A3 at the left end. The holding grooves 639 are formed across the upper wall portion 631, the left wall portion 635, and the lower wall portion 632.

[0053] As shown in FIGS. 4 and 5, the two coil terminals 26 are respectively inserted into the two holding grooves 639 of the lower flange portion 63 and held by the lower flange portion 63. One of the two coil terminals 26 is connected to the first end of the coil 21, and the other is connected to the second end of the coil 21.

[0054] As shown in FIG. 5, the coil terminal 26 includes a first terminal portion 261 connected to the coil 21, a second terminal portion 262 connected to an external device, and a connecting portion 263 connecting between the first terminal portion 261 and the second terminal portion 262. The first terminal portion 261 protrudes upward from the upper wall portion 631 of the lower flange portion 63. The second terminal portion 262 protrudes downward from the lower wall portion 632 of the lower flange portion 63. As shown in FIG. 1, the second terminal portion 262 is exposed downward from the case 9.

[0055] As shown in Fig. 5, the iron core 23 is formed in a cylindrical shape. The iron core 23 is inserted vertically along the first axis A1 into the bobbin 22. The iron core 23 is inserted into the main body portion 61 of the bobbin 22. The iron core 23 has a disk-shaped magnetic pole portion 231 at one end (upper end) on the first axis A1. As shown in Fig. 4, the magnetic pole portion 231 is exposed above the bobbin 22. The lower surface of the magnetic pole portion 231 is supported by the support base portion 623 of the upper flange portion 62 of the bobbin 22. The iron core 23 has a relatively small-diameter thin-diameter portion 232 at its lower end portion.

[0056] As shown in Figs. 4 and 5, the coil 21 is wound around the bobbin 22. The coil 21 is wound around the periphery of the main body portion 61 of the bobbin 22. Therefore, the coil 21 is wound around the iron core 23.

[0057] The first end of the coil 21 is connected to one of the two coil terminals 26, and the second end of the coil 21 is connected to the other of the two coil terminals 26.

[0058] As shown in Fig. 5, the yoke 25 includes a first yoke 251 and a second yoke 252.

[0059] The first yoke 251 is a rectangular plate shape extending along the first axis A1. The second yoke 252 is a rectangular plate shape extending along the second axis A2. The lower end of the first yoke 251 is connected to the right end of the second yoke 252, and the first yoke 251 and the second yoke form an inverted L shape in a front view.

[0060] The first yoke 251 has two fixing protrusions 253 for fixing the movable spring 31 at both ends (front end and rear end) of the third axis A3 on its right surface. The fixing protrusions 253 can be formed, for example, by pushing out the portion of the left surface of the first yoke 251 corresponding to the fixing protrusions 253 from the left to the right.

[0061] The second yoke 252 has a through hole 254. The through hole 254 penetrates the second yoke 252 along the first axis A1.

[0062] As shown in FIGS. 4 and 5, the first yoke 251 is disposed on the right side of the coil 21. The second yoke 252 is inserted into the internal space of the lower flange portion 63 of the bobbin 22 through the opening 630 from the right side. Then, the iron core 23 (more specifically, the small-diameter portion 232) is inserted into the through-hole 254 of the second yoke 252 from above (see FIGS. 9 and 10A). Thereby, the iron core 23 is fixed to the yoke 25. The yoke 25 forms a magnetic circuit together with the iron core 23.

[0063] The length of the first yoke 251 (dimension along the first axis A1) is larger than the interval between the upper flange portion 62 (upper flange main body 621) and the lower flange portion 63 (upper wall portion 631) of the bobbin 22. The width of the first yoke 251 (dimension along the third axis A3) is substantially the same as the diameter of the coil 21. In a side view seen from the right side, the first yoke 251 covers substantially the entire coil 21.

[0064] As shown in FIGS. 4 and 5, the insulating member 24 is disposed between the bobbin 22 and the yoke 25. The insulating member 24 is positioned between the coil 21 and the yoke 25. The insulating member 24 insulates between the coil 21 and the yoke 25. The insulating member 24 covers the coil 21 from the right side. The insulating member 24 is covered from the right side by the yoke 25.

[0065] As shown in FIGS. 5 and 8, the insulating member 24 includes a main body portion 241, a covering portion (first covering portion) 242, a first connecting portion 243, a second covering portion 244, a second connecting portion 245, a pair of first protrusions 246, and a pair of second protrusions 247. The main body portion 241, the first covering portion 242, the first connecting portion 243, the second covering portion 244, the second connecting portion 245, the pair of first protrusions 246, and the pair of second protrusions 247 are integrally formed as a molded body of an electrically insulating synthetic resin.

[0066] The main body portion 241 is in the shape of a plate with a substantially C-shaped cross-section orthogonal to the first axis A1. The main body portion 241 covers the coil 21 from the right side facing the right side surface of the coil 21. The left side surface of the main body portion 241 has a central portion extending back and forth along the third axis A3 so as to conform to the curvature of the right side surface of the coil 21, and both end portions extending obliquely forward to the left and obliquely backward to the left with respect to the central portion from both ends of the third axis A3 of the central portion. Also, the main body portion 241 is covered from the right side by the first yoke 251.

[0067] The first covering portion 242 is located below the main body portion 241. The first covering portion 242 is in the shape of a plate having a width along the second axis A2.

[0068] The first covering portion 242 covers at least a part of the second yoke 252. The first covering portion 242 covers at least a part of the second yoke 252 from above. The first covering portion 242 covers a portion near the right end of the second yoke 252 that is connected to the first yoke 251 (see FIG. 4). The first covering portion 242 integrally has an upper covering portion 291 that covers the upper surface of the second yoke 252, a front covering portion 292 that covers the front side surface of the second yoke 252, and a rear covering portion 293 that covers the rear side surface of the second yoke 252. That is, the first covering portion 242 covers the second yoke 252 from above and from the front and rear three directions. The portion of the second yoke 252 in which the through hole 254 is formed is not covered by the first covering portion 242 and is exposed from the first covering portion 242.

[0069] The first covering portion 242, together with the second yoke 252, is inserted through the opening 630 from the right side into the internal space of the lower flange portion 63 of the bobbin 22. For example, after inserting the first covering portion 242 through the opening 630 from the right side into the internal space of the lower flange portion 63, the second yoke 252 is inserted through the opening 630 from the right side into the internal space of the lower flange portion 63 below the first covering portion 242. Here, the first covering portion 242 is press-fitted into the interior of the lower flange portion 63 through the opening 630. Further, the second yoke 252 is inserted through the opening 630 into the internal space of the lower flange portion 63 and press-fitted between the lower wall portion 632 of the lower flange portion 63 and the first covering portion 242. Thereby, the insulating member 24 and the yoke 25 are fixed to the bobbin 22. Since the insulating member 24 and the yoke 25 are fixed to the bobbin 22, even if the electromagnetic relay 100 vibrates, defects such as chipping are less likely to occur in the bobbin 22 or the insulating member 24.

[0070] FIG. 9 shows a horizontal cross-sectional view of the electromagnet block 2 on a virtual plane passing through the lower flange portion 63. As shown in FIG. 9, the lower flange portion 63 of the bobbin 22 is provided with a bobbin-side guide 69. The bobbin-side guide 69 is an inclined surface formed on the right side surfaces of the front wall portion 633 and the rear wall portion 634 at the entrance of the opening 630 of the lower flange portion 63. The bobbin-side guide 69 guides the first covering portion 242 of the insulating member 24. By providing the lower flange portion 63 with the bobbin-side guide 69, the attachment of the insulating member 24 to the bobbin 22 becomes easier.

[0071] As shown in FIG. 9, the first covering portion 242 of the insulating member 24 is provided with an insulating-member-side guide 240. The insulating-member-side guide 240 is an inclined surface formed on the rear side surfaces of the front covering portion 292 and the rear covering portion 293 of the first covering portion 242. The insulating-member-side guide 240 guides the second yoke 252. By providing the insulating member 24 with the insulating-member-side guide 240, the attachment of the yoke 25 to the insulating member 24, and thus the attachment of the yoke 25 to the bobbin 22, becomes easier. Further, the second yoke 252 has inclined surfaces 255 at both corner portions of its tip (left end). By the second yoke 252 having the inclined surfaces 255, the attachment of the yoke 25 to the insulating member 24 becomes easier.

[0072] In the state where the first covering portion 242 and the second yoke 252 are inserted into the opening 630, as shown in FIG. 10A, from the bottom along the first axis A1, the lower wall portion 632 of the lower flange portion 63, the second yoke 252, the first covering portion 242 of the insulating member 24, the upper wall portion 631 of the lower flange portion 63, and the coil 21 are arranged in this order. Therefore, the upper surface of the first covering portion 242 (the upper surface of the upper covering portion 291) is covered from above by the upper wall portion 631 of the lower flange portion 63. Also, the lower surface of the second yoke 252 is covered from below by the lower wall portion 632 of the lower flange portion 63. That is, in the electromagnetic relay 100, between the coil 21 and the second yoke 252 along the first axis A1, the upper wall portion 631 of the lower flange portion 63 and the first covering portion 242 (upper covering portion 291) of the insulating member 24 are interposed. Therefore, in a cross-section orthogonal to the third axis A3, the shortest path between the coil 21 and the second yoke 252 is the path indicated by the two-dot chain line L1 in FIG. 10B. Thereby, it becomes possible to increase the insulation distance between the coil 21 and the yoke 25 as compared with an electromagnetic relay of a comparative example in which the insulating member does not include the first covering portion. In FIG. 10B, for the sake of convenience of explanation, it is drawn as if a gap is formed between the components. Also, as described above, since the first covering portion 242 covers the second yoke 252 from three directions (above, front, and rear), it becomes possible to further increase the insulation distance between the coil 21 and the second yoke 252. Also, since the first covering portion 242 does not cover the lower surface of the second yoke 252, it becomes possible to suppress an increase in the dimension of the electromagnet block 2 along the first axis A1.

[0073] As shown in FIG. 8, the first connecting portion 243 connects between the main body portion 241 and the first covering portion 242. The first connecting portion 243 connects between the lower edge of the right end of the main body portion 241 and the right end of the upper surface of the first covering portion 242.

[0074] The second covering portion 244 is located above the main body portion 241. The second covering portion 244 is plate-shaped with a width along the second axis A2.

[0075] The second covering portion 244 covers at least a part of the upper surface of the upper flange portion 62 (upper flange main body 621) of the bobbin 22. As shown in FIG. 4, the second covering portion 244 covers the right end portion of the upper surface of the upper flange main body 621. The magnetic pole portion 231 of the iron core 23 is exposed without being covered by the second covering portion 244.

[0076] In a top view, the second covering portion 244 has steps at the left front end and left rear end portions, respectively. The right end portions of the base portions 641 of the first wall portion 64 and the base portions 651 of the second wall portion 65 of the upper flange portion 62 are fitted into these stepped portions. As shown in FIGS. 4 and 15, in a top view, the base portion 641 of the first wall portion 64, the third wall portion 66, the base portion 651 of the second wall portion 65 of the upper flange portion 62, and the second covering portion 244 of the insulating member 24 are connected in a rectangular frame shape.

[0077] As shown in FIG. 4, the upper surface of the second covering portion 244 has a height position (position on the first axis A1) that is substantially the same as the height positions of the base portion 641 of the first wall portion 64 and the base portion 651 of the second wall portion 65 of the upper flange portion 62.

[0078] As shown in FIG. 8, a concave portion 248 is formed on the lower surface of the second covering portion 244 along the second axis A2. The positioning portion 626 of the upper flange portion 62 of the bobbin 22 is fitted into the concave portion 248 along the second axis A2, thereby positioning the insulating member 24 with respect to the bobbin 22. As shown in FIG. 10A, with the positioning portion 626 fitted into the concave portion 248, the upper surface (upper surface of the upper covering portion 291) of the first covering portion 242 is in contact with the lower surface of the upper wall portion 631 of the lower flange portion 63.

[0079] The second connecting portion 245 connects between the main body portion 241 and the second covering portion 244. The second connecting portion 245 connects between the upper edge of the right end of the main body portion 241 and the right end of the lower surface of the second covering portion 244.

[0080] A groove is formed along the third axis A3 between the second covering portion 244, the second connecting portion 245, and the main body portion 241. As shown in FIG. 10A, the right end portion of the upper flange main body 621 of the upper flange portion 62 of the bobbin 22 is fitted into this groove.

[0081] As shown in FIG. 8, a pair of first protrusions 246 protrude rightward along the second axis A2 from the right surfaces of the front covering portion 292 and the rear covering portion 293 of the first covering portion 242, respectively. The first protrusion 246 has a substantially rectangular parallelepiped shape extending along the second axis A2. As shown in FIG. 4, the first protrusion 246 is placed on the upper surface of the lower wall portion 632 of the lower flange portion 63 of the bobbin 22. The pair of first protrusions 246 cover the front side surface and the rear side surface of the lower end portion of the first yoke 251, respectively.

[0082] A pair of second protrusions 247 protrude rightward along the second axis A2 from the front end portion and the rear end portion of the right surface of the second connecting portion 245, respectively. The pair of second protrusions 247 cover the front side surface and the rear side surface of the upper end portion of the first yoke 251, respectively.

[0083] (2.2) Movable block As shown in FIGS. 4 and 11, the movable block 3 includes a movable spring 31, a movable contact member 32, and a terminal 33.

[0084] The movable spring 31 includes leg pieces 35, a fixed piece 36, a spring piece 37, and a movable piece 38. The movable spring 31 has two leg pieces 35. The two leg pieces 35, the fixed piece 36, the spring piece 37, and the movable piece 38 are integrally formed of a conductive metal material.

[0085] The leg piece 35 is a rectangular plate shape extending along the first axis A1. The two leg pieces 35 are arranged along the third axis A3. The leg piece 35 is a terminal connected to an external electrical device. As shown in FIG. 1, the leg piece 35 is exposed downward from the case 9.

[0086] The fixed piece 36 is a plate shape extending upward from the upper end of the leg piece 35. The fixed piece 36 is a portion fixed to the yoke 25, more specifically, the first yoke 251. The fixed piece 36 has two fixing holes 311 into which two fixing protrusions 253 of the first yoke 251 are inserted, respectively.

[0087] The spring piece 37 is in the shape of an inverted L-shaped plate with its top and bottom reversed when viewed from the front. The spring piece 37 has flexibility. The spring piece 37 has a plate-shaped first plate spring portion 371 extending upward from the upper end of the fixed piece 36, a curved portion 372 curving leftward from the upper end of the first plate spring portion 371, and a second plate spring portion 373 extending leftward from the left end of the curved portion 372.

[0088] The movable piece 38 is plate-shaped and extends leftward from the left end of the second plate spring portion 373 of the spring piece 37. The joint portion between the movable piece 38 and the spring piece 37 (the second plate spring portion 373) is bent in a V shape when viewed from the front. The movable piece 38 can move up and down along the first axis A1 in response to the deflection of the spring piece 37. The movable piece 38 is inclined with respect to the normal direction of the fixed piece 36.

[0089] The movable piece 38 includes a pole holder 381 and a contact holder 382. The pole holder 381 is located relatively on the right side of the movable piece 38. The contact holder 382 is located relatively on the left side of the movable piece 38.

[0090] The pole 33 is held by the pole holder 381. Three fixing holes 313 are formed side by side along the third axis A3 in the pole holder 381.

[0091] The movable contact M1 is held by the contact holder 382. The contact holder 382 has a through hole 314. The through hole 314 is provided relatively on the rear side on the third axis A3 of the movable spring 31. Therefore, the center of the through hole 314 is located on the rear side of the center of the middle fixing hole 313 among the three fixing holes 313.

[0092] As shown in FIG. 11, the pole 33 includes a pole body 331, fixing protrusions 332, and hook pieces 333. The pole 33 has three fixing protrusions 332. Also, the pole 33 has two hook pieces 333. The pole body 331, the three fixing protrusions 332, and the two hook pieces 333 are integrally formed of a magnetic material.

[0093] The terminal body 331 is in the shape of a plate that is approximately rectangular when viewed from above. The three fixing protrusions 332 are provided on the upper surface of the terminal body 331. The three fixing protrusions 332 are arranged side by side along the third axis A3. The three fixing protrusions 332 of the terminal 33 are inserted into the three fixing holes 313 of the terminal holding portion 381 of the movable spring 31 from below, and the tip of the fixing protrusion 332 is crushed, so that the terminal 33 is fixed to the movable spring 31 (terminal holding portion 381). The terminal 33 is disposed below the movable spring 31 and fixed to the movable spring 31. That is, the movable spring 31 is fixed to the upper surface of the terminal 33.

[0094] As shown in FIGS. 2 and 3, with the movable block 3 fixed to the electromagnet block 2, the lower surface of the terminal 33 faces the upper surface of the iron core 23 (the upper surface of the magnetic pole portion 231).

[0095] In a top view, the terminal 33 has a first end E1 and a second end E2 on a second axis A2 that intersects the first axis A1 (see FIG. 11). In the present embodiment, the first end E1 is the left end and the second end E2 is the right end.

[0096] The two hook pieces 333 are at the second end E2 (right end) of the terminal 33. The two hook pieces 333 protrude downward from the front end portion and the rear end portion of the right side surface of the terminal body 331, respectively. As shown in FIG. 3, the hook piece 333 is hooked on the upper end portion of the right surface of the first yoke 251. Therefore, the terminal 33 rotates about the hook piece 333 as a fulcrum according to the presence or absence of the attractive force between the terminal 33 and the iron core 23. The movable piece 38 of the movable spring 31 moves up and down along the first axis A1 together with the terminal body 331.

[0097] As shown in FIG. 11, the movable contact member 32 includes a head 321 and a body 322.

[0098] The shape of the head 321 is frustum-shaped. The axis of the head 321 is along the first axis A1. The lower surface of the head 321 functions as the movable contact M1. Among the movable contact member 32, the lower surface that functions as the movable contact M1 is formed of, for example, a silver alloy (AgNi or AgSnO2). Among the movable contact member 32, the parts other than the movable contact M1 are formed of a copper alloy such as tough pitch copper. Among the movable contact member 32, the surface (lower surface) that functions as the movable contact M1 is spherical. Note that the surface (lower surface) that functions as the movable contact M1 among the movable contact member 32 may be planar or dome-shaped.

[0099] The body 322 protrudes from the upper end of the head 321. The body 322 is inserted into the through hole 314 of the contact holding portion 382 of the movable spring 31. The movable contact member 32 is fixed to the movable spring 31 by caulking with the body 322 passed through the through hole 314 of the contact holding portion 382. Thereby, the movable contact member 32 is electrically connected to the movable spring 31.

[0100] Note that the movable contact M1 may be integrally formed with the movable spring 31. For example, a part of the metal plate constituting the movable spring 31 may be protruded downward, and the tip of the protruded part may be used as the movable contact M1.

[0101] Thus, the movable contact M1 is provided on the movable spring 31 on the side of the first end E1 (left end) of the contactor 33 in a top view. The movable contact M1 moves up and down along the first axis A1 together with the contactor body 331 in accordance with the movement of the contactor 33 (rotation about the hooking piece 333 as a fulcrum).

[0102] (2.3) Fixed block As shown in FIGS. 3 and 12, the fixed block 4 includes a holding base 41, a conductive member 42, a fixed contact member 43, and an auxiliary member 44.

[0103] The holding base 41 is in the shape of a rectangular box with an open right side. As shown in FIGS. 12 and 13, the holding base 41 includes a left wall 45, a front wall 46, a rear wall 47, a lower wall 48, an upper wall 49, and an auxiliary wall 40. The left wall 45, the front wall 46, the rear wall 47, the lower wall 48, the upper wall 49, and the auxiliary wall 40 are integrally formed as a molded body of an electrically insulating synthetic resin.

[0104] An engaging hole 411 is formed at the right end of the lower wall 48. At the upper end of the right side surface of the front wall 46, a recess 412 recessed leftward along the second axis A2 is formed. At the upper end of the right side surface of the rear wall 47, a recess 413 recessed leftward along the second axis A2 is formed. At the front end portion of the lower surface of the upper wall 49, a holding groove 414 extending along the second axis A2 is formed.

[0105] The front end portion and the rear end portion of the protruding plate portion 624 of the upper flange portion 62 of the bobbin 22 are respectively inserted into the recess 412 of the front wall 46 and the recess 413 of the rear wall 47. The holding protrusion 625 of the upper flange portion 62 of the bobbin 22 is inserted (press-fitted here) into the holding groove 414 of the upper wall 49. The engaging protrusion 638 of the lower flange portion 63 of the bobbin 22 is engaged with the engaging hole 411 of the lower wall 48. Thereby, the fixing block 4 is coupled to the main body block 10. In a state where the fixing block 4 is coupled to the main body block 10, the left wall 45 of the holding base 41 faces the left side surface of the coil 21 and covers the coil 21 from the left side (see FIG. 2).

[0106] On the upper surface of the upper wall 49, a protruding wall portion 415 protruding upward along the first axis A1 is provided. The protruding wall portion 415 extends back and forth along the third axis A3.

[0107] As shown in FIG. 13, at the lower end portion of the left surface of the left wall 45, a holding recess 416 recessed rightward is formed. On the left surface of the rear wall 47, a holding recess 417 recessed rightward is formed along the first axis A1.

[0108] The auxiliary wall 40 protrudes upward from the upper end of the front wall 46. A holding groove 418 extending along the first axis A1 is formed on the left surface of the holding base 41 from the auxiliary wall 40 to the upper portion of the front wall 46. The holding groove 418 is used to hold the auxiliary member 44.

[0109] As shown in FIG. 12, the conductive member 42 includes a leg piece 421, a central piece 422, a first fixing piece 423, a second fixing piece 424, and a holding piece 425. The conductive member 42 includes two leg pieces 421. The two leg pieces 421, the central piece 422, the first fixing piece 423, the second fixing piece 424, and the holding piece 425 are integrally formed of a metallic material having conductivity.

[0110] The leg piece 421 is plate-shaped and extends along the first axis A1. The two leg pieces 421 are arranged along the third axis A3. The leg piece 421 is a terminal connected to an external electrical device. As shown in FIG. 1, the leg piece 421 is exposed downward from the case 9.

[0111] The central piece 422 is plate-shaped and extends upward from the upper end of the leg piece 421. The right surface of the central piece 422 faces the left surface of the left wall 45 of the holding base 41.

[0112] The first fixing piece 423 is plate-shaped and extends rightward along the second axis A2 from the lower end of the central piece 422. The first fixing piece 423 extends from a portion between the two leg pieces 421 at the lower end of the central piece 422.

[0113] The second fixing piece 424 is plate-shaped and extends rightward along the second axis A2 from the trailing edge of the central piece 422. The second fixing piece 424 extends from the center on the first axis A1 at the trailing edge of the central piece 422.

[0114] The first fixing piece 423 is inserted into the holding recess 416 of the holding base 41 from the left. The second fixing piece 424 is inserted into the holding recess 417 of the holding base 41 from the left. Thereby, the conductive member 42 is held by the holding base 41.

[0115] Between the conductive member 42 and the coil 21, the left wall 45 and the protruding wall portion 415 of the holding base 41 are interposed. Therefore, the holding base 41 functions as an insulating member 7 that is disposed between the coil 21 and the conductive member 42 and insulates between the coil 21 and the conductive member 42. The insulating member 7 includes an insulating wall portion 70 (protruding wall portion 415) along the first axis A1 (see FIG. 3). The insulating wall portion 70 is between the fixed contact F1 and the center of the coil 21 on the second axis A2.

[0116] The holding piece 425 is plate-shaped with the thickness axis along the first axis A1. The holding piece 425 extends rightward from the upper end of the central piece 422. The holding piece 425 is located above the upper wall 49 of the holding base 41. The holding piece 425 has a through hole 426 at the center.

[0117] The conductive member 42 has a through hole 427 at the connecting portion between the central piece 422 and the holding piece 425. Therefore, the current flowing through the holding piece 425 includes not only the component along the second axis A2 but also the component along the third axis A3. The current component along the third axis A3 gives a Lorentz force in a direction intersecting the first axis A1 to an arc that can be generated along the first axis A1 between the movable contact M1 and the fixed contact F1, and promotes arc extinction.

[0118] As shown in FIG. 12, the fixed contact member 43 includes a head portion 431 and a body portion 432, similar to the movable contact member 32. The fixed contact member 43 and the conductive member 42 constitute a fixed contact portion 400.

[0119] The shape of the head portion 431 is a frustum of a cone. The axis of the head portion 431 is along the first axis A1. The upper surface of the head portion 431 functions as the fixed contact F1. Among the fixed contact member 43, the upper surface that functions as the fixed contact F1 is formed of, for example, a silver alloy (AgNi or AgSnO2). Among the fixed contact member 43, the portions other than the fixed contact F1 are formed of, for example, a copper alloy such as tough pitch copper. Among the fixed contact member 43, the surface (upper surface) that functions as the fixed contact F1 is spherical. Note that the surface (upper surface) that functions as the fixed contact F1 among the fixed contact member 43 may be planar or dome-shaped.

[0120] The body portion 432 protrudes from the lower end of the head portion 431. The body portion 432 is inserted into the through hole 426 of the holding piece 425 of the conductive member 42. The fixed contact member 43 is fixed to the conductive member 42 by caulking with the body portion 432 passed through the through hole 426 of the holding piece 425. Thereby, the fixed contact member 43 is electrically connected to the conductive member 42.

[0121] Note that the fixed contact F1 may be integrally formed with the conductive member 42. For example, a part of the metal plate constituting the conductive member 42 may be protruded upward, and the tip of the protruded portion may be used as the fixed contact F1.

[0122] As shown in FIGS. 2, 3, and 10A, with the fixing block 4 fixed to the main body block 10, the fixed contact F1 faces the movable contact M1 along the first axis A1. By the movable piece 38 of the movable spring 31 moving up and down, the movable contact M1 comes into contact with and separates from the fixed contact F1. Further, a protruding wall portion 415 is interposed between the fixed contact F1 and the iron core 23 (magnetic pole portion 231).

[0123] As shown in FIG. 12, the auxiliary member 44 includes a side piece 441 and an upper piece 442. The side piece 441 and the upper piece 442 are integrally formed of a conductive metal material.

[0124] The side piece 441 is plate-shaped and extends along the first axis A1. The side piece 441 has a recess 443 recessed leftward along the second axis A2 on its right side surface. By the recess 443, the auxiliary member 44 is positioned with respect to the holding base 41 on the first axis A1.

[0125] The upper piece 442 is plate-shaped and extends rearward along the third axis A3 from the upper end of the side piece 441. A protrusion 444 protruding downward more than other portions of the upper piece 442 is provided on the lower surface of the upper piece 442. The lower surface of the protrusion 444 faces the upper surface of the body portion 322 of the movable contact member 32.

[0126] Since the upper piece 442 of the auxiliary member 44 is above the movable contact member 32, even if the movable spring 31 vibrates when the movable contact M1 moves away from the fixed contact F1 and the movable spring 31 moves upward, excessive vibration of the movable spring 31 is suppressed.

[0127] (2.4) Relay body The relay body 1 is configured by coupling an electromagnet block 2, a movable block 3, and a fixed block 4.

[0128] For example, as shown in FIG. 4, with respect to the electromagnet block 2, the movable block 3 is positioned to the right. Then, the movable block 3 is moved leftward along the second axis A2, and two fixing protrusions 253 of the first armature 251 are respectively inserted into two fixing holes 311 of the fixing piece 36 of the movable spring 31, and the tips of the fixing protrusions 253 are crushed. Thereby, the movable block 3 is fixed to the electromagnet block 2. Thereby, the main body block 10 in which the electromagnet block 2 and the movable block 3 are coupled is configured (see FIG. 3).

[0129] Also, as shown in FIG. 3, with respect to the main body block 10, the fixed block 4 is positioned to the left. Then, the fixed block 4 is moved rightward along the second axis A2, the protruding plate portion 624 of the upper flange portion 62 of the bobbin 22 is inserted into the recesses 412 and 413 of the holding base 41, the holding protrusion 625 of the upper flange portion 62 is inserted into the holding groove 414 of the holding base 41, and the engaging protrusion 638 (see FIG. 7) of the lower flange portion 63 is engaged with the engaging hole 411 of the holding base 41. Thereby, the fixed block 4 is fixed to the main body block 10 (see FIG. 2). Note that the bobbin 22 may be further fixed to the holding base 41 by adhesion or the like.

[0130] In this way, the electromagnetic relay 100 includes a main terminal block (bobbin 22 and insulating member 24) that holds the bobbin 22 and the movable spring 31, and a sub-terminal block (holding base 41) that holds the fixed contact F1. The sub-terminal block is separate from the main terminal block and is fixed to the main terminal block. In the electromagnetic relay 100 of this embodiment, the main terminal block and the sub-terminal block are separate. Therefore, it is possible to separate the adjustment of the components held by one terminal block (for example, the main terminal block) (such as component alignment and spring force adjustment) from the adjustment of the components held by the other terminal block (for example, the sub-terminal block). As a result, it is possible to simplify the manufacturing process of the electromagnetic relay 100.

[0131] Also, in the relay body 1 of the electromagnetic relay 100 of this embodiment, an insulating member 7 (holding base 41) is disposed between the coil 21 and the fixed contact portion 400 (conductive member 42). Therefore, it is possible to increase the insulation distance between the coil 21 and the conductive components (hereinafter also referred to as "main circuit components") that are electrically connected to the contact device (movable contact M1 and fixed contact F1). In the relay body 1 of the electromagnetic relay 100 of this embodiment, the main circuit components include the movable spring 31, the conductive member 42, the iron core 23, the pole piece 33, and the armature 25. In the electromagnetic relay 100, among the main circuit components, the holding piece 425 of the conductive member 42, the fixed contact member 43 (fixed contact F1), and the movable piece 38 (movable contact M1) of the movable spring 31 are disposed above the bobbin 22. That is, in the electromagnetic relay 100, the fixed contact F1 and the movable contact M1 are provided above the bobbin 22.

[0132] Also, in the relay body 1 of the electromagnetic relay 100 of this embodiment, the insulating member 24 includes a first covering portion 242. Therefore, in the cross section orthogonal to the third axis A3, the shortest path between the coil 21 and the second armature 252 is a path that wraps around the first covering portion 242 as shown by the two-dot chain line L1 in FIG. 10B. As a result, it is possible to increase the insulation distance between the coil 21 and the second armature 252, and it is further possible to increase the insulation distance between the coil 21 and the main circuit components.

[0133] Further, in the relay body 1 of the electromagnetic relay 100 of the present embodiment, the insulating member 24 includes a second covering portion 244. Therefore, in a cross section orthogonal to the third axis A3, the shortest path between the coil 21 and the contactor 33 is a path that wraps around the second covering portion 244 as shown by the two-dot chain line L2 in FIG. 10C. As a result, it becomes possible to increase the insulation distance between the coil 21 and the contactor 33, and it also becomes possible to further increase the insulation distance between the coil 21 and the main circuit components. In FIG. 10C, for convenience of explanation, it is depicted as if there are gaps formed between the components.

[0134] Also, in the relay body 1 of the electromagnetic relay 100 of the present embodiment, on the second axis A2, between the magnetic pole portion 231 of the iron core 23 and the fixed contact F1, the third wall portion 66 of the upper flange portion 62 of the bobbin 22 is interposed. Therefore, in a cross section orthogonal to the third axis A3, the shortest path between the coil 21 and the iron core 23 is a path that wraps around the third wall portion 66 as shown by the two-dot chain line L3 in FIG. 10D. As a result, it becomes possible to increase the insulation distance between the coil 21 and the iron core 23, and it also becomes possible to further increase the insulation distance between the coil 21 and the main circuit components. In FIG. 10D, for convenience of explanation, it is depicted as if there are gaps formed between the components.

[0135] Also, in the relay body 1 of the electromagnetic relay 100 of the present embodiment, on the second axis A2, between the magnetic pole portion 231 of the iron core 23 and the fixed contact F1, the protruding wall portion 415 of the holding base 41 (the insulating wall portion 70 of the insulating member 7) is interposed. Therefore, in a cross section orthogonal to the third axis A3, the shortest path between the coil 21 and the fixed contact F1 is a path that wraps around the insulating wall portion 70 as shown by the two-dot chain line L4 in FIG. 10D. As a result, it becomes possible to increase the insulation distance between the coil 21 and the fixed contact F1, and it also becomes possible to further increase the insulation distance between the coil 21 and the main circuit components.

[0136] Next, the operation of the relay body 1 (the operation of the electromagnetic relay 100) will be described.

[0137] In the relay body 1, when no voltage is applied between the two coil terminals 26 and the coil 21 is not energized (hereinafter also referred to as "when not energized"), as shown in FIG. 2, due to the spring force of the movable spring 31, the movable contact M1 is separated from the fixed contact F1. Therefore, the circuit between the leg piece 421 of the conductive member 42 and the leg piece 35 of the movable spring 31 is interrupted.

[0138] In the relay body 1, when a voltage is applied between the two coil terminals 26 and the coil 21 is energized (hereinafter also referred to as "when energized"), the armature 33 is attracted downward along the first axis A1 toward the magnetic pole portion 231 by the attractive force generated between the armature 33 and the magnetic pole portion 231 of the iron core 23. As a result, the armature 33 rotates (counterclockwise in a front view) with the hook piece 333 as a fulcrum, and the lower surface of the armature 33 comes into contact with the upper surface of the magnetic pole portion 231 of the iron core 23. When energized, a magnetic circuit through which the magnetic flux generated by the coil 21 passes is formed by the iron core 23, the yoke 25, and the armature 33. The yoke 25 and the armature 33 that form part of the magnetic circuit are connected in an inverted C shape in a front view between both ends of the iron core 23.

[0139] When energized, due to the rotation of the armature 33, the movable contact M1 moves downward together with the armature 33. Therefore, when energized, the movable contact M1 comes into contact with the fixed contact F1. As a result, a circuit is formed between the leg piece 421 of the conductive member 42 and the leg piece 35 of the movable spring 31.

[0140] In the relay body 1, when the energization of the coil 21 is stopped, the attractive force between the iron core 23 and the armature 33 disappears. Therefore, in the relay body 1, due to the spring force of the movable spring 31, the armature 33 rotates (clockwise in a front view) with the hook piece 333 as a fulcrum, and the armature 33 moves away from the iron core 23. Due to the rotation of the armature 33, the movable contact M1 moves upward together with the armature 33 and separates from the fixed contact F1. As a result, the circuit is interrupted.

[0141] As described above, in the electromagnetic relay 100 of the present embodiment, the movable spring 31 is movable between the closed position and the open position in accordance with the switching between the excitation and non-excitation of the coil 21. The closed position is the position of the movable spring 31 where the movable contact M1 contacts the fixed contact F1. The open position is the position of the movable spring 31 where the movable contact M1 separates from the fixed contact F1.

[0142] In the relay body 1 (electromagnetic relay 100) of the present embodiment, the movable contact M1 moves along the contact separation axis X1 to contact and separate from the fixed contact F1. The contact separation axis X1 is along the first axis A1.

[0143] (2.5) Case As shown in FIGS. 1 and 2, the case 9 houses the relay body 1. Therefore, the case 9 houses the coil 21, the iron core 23, the armature 33, the fixed contact F1, and the movable spring 31. The case 9 also houses the main terminal block (bobbin 22 and insulating member 24), and the sub-terminal block (holding base 41). The case 9 is, for example, a molded body of synthetic resin having electrical insulation properties and is insulating.

[0144] As shown in FIGS. 2 and 14, the case 9 includes a case body 90. The case body 90 constitutes the outer shell of the case 9. The case body 90 is in the shape of a rectangular box with an open bottom surface. The case body 90 includes an upper wall 91, a front wall 92, a rear wall 93, a right wall 94, and a left wall 95.

[0145] As shown in FIG. 14, the case 9 further includes a first rib portion 961 and two first connection portions 962 inside the case body 90. The first rib portion 961 is plate-shaped and extends along the first axis A1. The first rib portion 961 extends along the second axis A2. The first rib portion 961 faces the front wall 92 with a gap at the third axis A3. The two first connection portions 962 connect the both ends of the first rib portion 961 at the second axis A2 and the rear surface of the front wall 92, respectively. The front wall 92, the first rib portion 961, and the two first connection portions 962 of the case body 90 form a first recess 96 with an open bottom surface.

[0146] Case 9 further includes a second rib portion 971 and two second connection portions 972 inside the case body 90 (see FIG. 15). The second rib portion 971 is plate-shaped and extends along the first axis A1. The second rib portion 971 extends along the second axis A2. The second rib portion 971 faces the rear wall 93 with a gap at the third axis A3. The two second connection portions 972 connect the both ends of the second rib portion 971 at the second axis A2 and the front surface of the rear wall 93, respectively. A second recess 97 with an open lower surface is formed by the rear wall 93, the second rib portion 971, and the two second connection portions 972 of the case body 90.

[0147] As shown in FIG. 15, the first wall portion 64 (more specifically, the protruding rib 642) of the upper flange portion 62 of the bobbin 22 is inserted into the first recess 96. Therefore, the first rib portion 961 faces the first wall portion 64 (more specifically, the protruding rib 642) at the third axis A3. Further, the first connection portion 962 is inserted into the first recess 643. The two first connection portions 962 are respectively inserted into the two first recesses 643. The first wall portion 64 (more specifically, the protruding rib 642) is surrounded by the first rib portion 961, the two first connection portions 962, and the front wall 92 in the four directions of front, rear, left, and right.

[0148] As shown in FIG. 15, the second wall portion 65 (more specifically, the protruding rib 652) of the upper flange portion 62 of the bobbin 22 is inserted into the second recess 97. Therefore, the second rib portion 971 faces the second wall portion 65 (more specifically, the protruding rib 652) at the third axis A3. Further, the second connection portion 972 is inserted into the second recess 653. The two second connection portions 972 are respectively inserted into the two second recesses 653. The second wall portion 65 (more specifically, the protruding rib 652) is surrounded by the second rib portion 971, the two second connection portions 972, and the rear wall 93 in the four directions of front, rear, left, and right.

[0149] Fig. 16A shows a cross-sectional view of the electromagnetic relay 100 on a virtual plane orthogonal to the second axis A2. In the electromagnetic relay 100 of the present embodiment, on the first axis A1, an upper flange portion 62 is interposed between the contact pole 33 and the coil 21. Therefore, in the cross-section orthogonal to the second axis A2, the shortest path between the contact pole 33 and the coil 21 is a path along the side surface of the upper flange portion 62. Here, in the electromagnetic relay 100 of the present embodiment, the upper flange portion 62 includes a first wall portion 64 and a second wall portion 65, and the first wall portion 64 and the second wall portion 65 are respectively inserted into the first recess 96 and the second recess 97 of the case 9. Therefore, in the cross-section orthogonal to the second axis A2, the shortest path between the contact pole 33 and the coil 21 is, for example, an S-shaped path including a space S1 between the first protrusion 961 of the case 9 and the first wall portion 64 (protrusion rib 642) as shown by the two-dot chain line L5 in Fig. 16B. Thereby, in the electromagnetic relay 100 of the present embodiment, it becomes possible to increase the insulation distance between the coil 21 and the contact pole 33, and it becomes possible to further increase the insulation distance between the coil 21 and the main circuit component. In Fig. 16B, for convenience of explanation, it is depicted as if there are gaps formed between the components.

[0150] In the electromagnetic relay 100 of the present embodiment, as shown in FIG. 16A, on the first axis A1, the lower ends of the first protrusion 961 and the second protrusion 971 of the case 9 are located below the upper surface of the iron core 23 (the upper surface of the magnetic pole portion 231). Also, the upper ends of the first wall portion 64 (the upper ends of the protruding ribs 642) and the second wall portion 65 (the upper ends of the protruding ribs 652) of the bobbin 22 are located above the upper surface of the iron core 23. The contact pole 33 moves up and down along the first axis A1, but since it cannot move below the upper surface of the iron core 23, the contact pole 33 is always located above the upper surface of the iron core 23. Since the lower end of the first protrusion 961 (the lower end of the second protrusion 971) is located below the upper surface of the iron core 23, the shortest path (see the two-dot chain line L5) between the contact pole 33 and the coil 21 is a path that goes around the first protrusion 961 (the second protrusion 971). Thereby, in the electromagnetic relay 100 of the present embodiment, compared with the electromagnetic relay of the comparative example in which the lower end of the first protrusion (the second protrusion) is located above the upper surface of the iron core, it is possible to increase the insulation distance between the coil 21 and the contact pole 33, and it is possible to increase the insulation distance between the coil 21 and the main circuit component.

[0151] In the electromagnetic relay 100 of the present embodiment, as shown in FIG. 16A, the lower end of the first protrusion 961 of the case 9 contacts the upper surface of the upper flange portion 62 of the bobbin 22 (the upper surface of the base portion 641 of the first wall portion 64) on the first axis A1. The upper end of the first wall portion 64 of the upper flange portion 62 of the bobbin 22 is separated from the case 9 on the first axis A1. Also, the lower end of the second protrusion 971 of the case 9 contacts the upper surface of the upper flange portion 62 of the bobbin 22 (the upper surface of the base portion 651 of the second wall portion 65) on the first axis A1. The upper end of the second wall portion 65 of the upper flange portion 62 of the bobbin 22 is separated from the case 9 on the first axis A1. In the electromagnetic relay 100, since the lower ends of the first protrusion 961 and the second protrusion 971 contact the upper surface of the upper flange portion 62, it is possible to increase the insulation distance between the coil 21 and the contact pole 33, and it is possible to increase the insulation distance between the coil 21 and the main circuit component.

[0152] In the electromagnetic relay 100 of the present embodiment, as shown in FIG. 15, the first protrusion 961 and the second protrusion 971 are provided at least at positions overlapping a virtual line extending along the third axis A3 from the center of the iron core 23. The center of the iron core 23 substantially coincides with the center of the coil 21. Therefore, the first protrusion 961 and the second protrusion 971 are provided at least at positions overlapping a virtual line extending along the third axis A3 from the center of the coil 21 in a top view. Also, the first recess 643 and the second recess 653 are not provided at positions overlapping the virtual line. Therefore, the shortest path between the contact terminal 33 and the coil 21 is a path that goes around the first protrusion 961 and the protruding rib 642, or the second protrusion 971 and the protruding rib 652. Thereby, it becomes possible to increase the insulation distance between the coil 21 and the contact terminal 33, and it becomes possible to further increase the insulation distance between the coil 21 and the main circuit component.

[0153] Also, in the electromagnetic relay 100 of the present embodiment, the protruding rib 642 (or the first recess 643) of the first wall portion 64 and the first connection portion 962 of the case 9 also serve as a positioning function of the case 9 with respect to the relay body 1. Similarly, the protruding rib 652 (or the second recess 653) of the second wall portion 65 and the second connection portion 972 of the case 9 also serve as a positioning function of the case 9 with respect to the relay body 1. That is, the positioning component also has the function of increasing the insulation distance. Thereby, it becomes possible to increase the insulation performance while reducing the number of parts.

[0154] Furthermore, in the electromagnetic relay 100 of the present embodiment, since the first protrusion 961 and the second protrusion 971 are adjacent to the front surface and the rear surface of the contact terminal 33, respectively, it is possible to suppress the excessive movement of the contact terminal 33 due to an external impact. Thereby, it becomes possible to suppress the deformation of the movable spring 31 fixed to the contact terminal 33. That is, the positioning component also has the function of improving the shock resistance performance. Thereby, it becomes possible to improve the shock resistance performance while reducing the number of parts.

[0155] As described above, the electromagnetic relay 100 of the present embodiment can increase the insulation distance between the main circuit component and the coil 21 as compared with the conventional one. Conversely, it is possible to reduce the size of the electromagnetic relay 100 while maintaining the same insulation performance as the conventional one. Alternatively, it is possible to reduce the power consumption of the coil 21 by increasing the size of the coil 21 while maintaining the same insulation performance as the conventional one.

[0156] (3) Modification The above-described embodiment is only one of various embodiments of the present disclosure. The above-described embodiment can be variously modified according to design and the like as long as the object of the present disclosure can be achieved. Hereinafter, modifications of the embodiment will be listed. Hereinafter, the above-described embodiment may also be referred to as a "basic example". The above basic example and the modifications described below can be applied in appropriate combinations.

[0157] (3.1) First modification The electromagnetic relay 100A of this modification will be described with reference to FIGS. 17 and 18. The description of the same configuration as that of the electromagnetic relay 100 of the basic example may be omitted as appropriate.

[0158] In the electromagnetic relay 100 of the basic example, as shown in FIG. 6, the hole 622 of the upper flange portion 62 of the bobbin 22 is formed at the center of the upper flange portion 62 on the third axis A3. On the other hand, in the electromagnetic relay 100A of this modification, as shown in FIG. 17, the hole 622A of the upper flange portion 62A of the bobbin 22A is formed relatively rearward of the center of the upper flange portion 62A on the third axis A3. Therefore, in the electromagnetic relay 100A of this modification, the iron core 23A and the coil 21 are also located relatively rearward of the center of the upper flange portion 62A on the third axis A3.

[0159] Also, in the electromagnetic relay 100A of this modified example, as shown in FIG. 17, the first wall portion 64A and the second wall portion 65A are asymmetric in top view. That is, the protruding rib 652A on the second wall portion 65A, which is relatively close to the center of the hole 622A (center of the coil 21), is longer in length (dimension along the second axis A2) than the protruding rib 642A on the first wall portion 64A, which is relatively far from the center of the hole 622A (center of the coil 21). Thereby, on the rear side where the insulation distance between the iron core 23A and the coil 21 is relatively short, the insulation distance between the contact terminal 33 and the coil 21 is relatively increased by the second wall portion 65A.

[0160] Also, as shown in FIG. 18, in the electromagnetic relay 100A of this modified example, the first recess 96A and the second recess 97A are asymmetric in top view. That is, the length of the first protruding portion 961A (dimension along the second axis A2) and the position along the second axis A2 of the first connecting portion 962A are determined such that the protruding rib 642A of the first wall portion 64A fits into the first recess 96A. Also, the length of the second protruding portion 971A (dimension along the second axis A2) and the position along the second axis A2 of the second connecting portion 972A are determined such that the protruding rib 652A of the second wall portion 65A fits into the second recess 97A.

[0161] In the electromagnetic relay 100A of this modified example, it is possible to increase the insulation distance between the coil 21 and the contact terminal 33.

[0162] (3.2) Other modified examples In one modified example, the method of fixing the sub-terminal block to the main terminal block is not limited to press-fitting. For example, it may be fixed by adhesion, resin welding, or the like.

[0163] In one modified example, the first covering portion 242 does not have to cover the second yoke 252 from three sides. For example, it may be provided with only the upper covering portion 291 and cover the second yoke 252 only from above.

[0164] In one modified example, the first covering portion 242 may further include a lower covering portion that covers the second yoke 252 from below.

[0165] In a modified example, a liquid sealing material (for example, an epoxy resin) may be poured on the lower surface side of the lower flange portion 63 and the lower flange portion 63 and the yoke 25 (the second yoke 252) may be joined by the solidified sealing material. Since the lower flange portion 63 has a lower wall portion 632 having a higher wettability with respect to the sealing material than the second yoke 252, sealing by the sealing material becomes easier. Further, since the lower surfaces of the second yoke 252 and the iron core 23 (the small diameter portion 232) are exposed from the holes 637 of the lower wall portion 632 of the lower flange portion 63, sealing by the sealing material becomes even easier. At this time, the lower flange portion 63 of the bobbin 22 and the insulating member 24 are also joined by the sealing material.

[0166] In a modified example, in the first wall portion 64, the thicknesses (dimensions along the third axis A3) of the base portion 641 and the protruding rib 642 may be the same. The same applies to the second wall portion 65.

[0167] In a modified example, the first recess 643 may not be provided at both ends of the first wall portion 64 in the second axis A2. For example, the first recess 643 may be provided only at one end of the second axis A2 of the first wall portion 64, or may be provided at the center. The first connection portion 962 of the case 9 may be provided at a position corresponding to the first recess 643. In one example, when the protruding rib 642 is formed over the entire length of the second axis A2 of the base portion 641 and the first recess 643 is provided at the center of the second axis A2 of the protruding rib 642, the first protruding portion 961 and the first connection portion 962 of the case 9 may be formed in a T shape in a top view. The same applies to the second recess 653 of the second wall portion 65 and the second connection portion 972 of the case 9.

[0168] In a modified example, the lower end of the first protruding portion 961 may not be in contact with the upper flange portion 62 (the upper surface of the base portion 641 of the first wall portion 64). In a modified example, the upper end of the protruding rib 642 of the first wall portion 64 may be in contact with the bottom of the first recess 96 of the case 9.

[0169] In a modified example, the lower end of the second protruding strip portion 971 may not be in contact with the upper flange portion 62 (the upper surface of the base portion 651 of the second wall portion 65). In a modified example, the upper end of the protruding rib 652 of the second wall portion 65 may be in contact with the bottom of the second recess 97 of the case 9.

[0170] In a modified example, the movable contact M1 and the fixed contact F1 may be provided below the bobbin 22. In this case, for example, the second armature 252 is disposed above the bobbin 22, and the first protruding strip portion 961 and the first wall portion 64 are provided so as to cover the front side surface of the second armature 252, and the second protruding strip portion 971 and the second wall portion 65 may be provided so as to cover the rear side surface of the second armature 252.

[0171] In a modified example, the insulating member 24 may not include the second covering portion 244. In that case, the height of the insulating member 24 (the dimension along the first axis A1) can be suppressed. Even in that case, since the insulating member 24 includes the first covering portion 242, the insulating member 24 can be firmly fixed to the bobbin 22.

[0172] In a modified example, according to the required insulation distance, the height of the protruding rib 642 of the first wall portion 64 (the dimension along the first axis A1), the height of the protruding rib 652 of the second wall portion 65, the height of the first protruding strip portion 961, and the height of the second protruding strip portion 971 may be adjusted.

[0173] In the above basic example, the contact device is a so-called a-contact (normally open contact) that cuts off the circuit when not energized, but is not limited thereto. In a modified example, the contact device may be a so-called b-contact (normally closed contact) that forms a circuit when not energized. In a modified example, the contact device may be a so-called c-contact that has two fixed contacts F1 and the movable contact M1 contacts a different fixed contact F1 when energized and when not energized. When the contact device is a b-contact or a c-contact, the lower surface of the protruding portion 444 of the auxiliary member 44 may be used as the fixed contact F1.

[0174] (4) Aspect As is apparent from the embodiments and modified examples described above, the following aspects are disclosed in this specification.

[0175] The electromagnetic relays (100, 100A) of the first aspect include a coil (21), a bobbin (22), an iron core (23), a fixed contact portion (400), a movable spring (31), and a case (9). The coil (21) is wound around the bobbin (22). The iron core (23) is inserted vertically into the bobbin (22) along the first axis (A1). The fixed contact portion (400) has a fixed contact (F1). The movable spring (31) has a movable contact (M1) that faces the fixed contact (F1) along the first axis (A1). The movable spring (31) moves between a closed position where the movable contact (M1) contacts the fixed contact (F1) and an open position where the movable contact (M1) separates from the fixed contact (F1) in response to the switching between excitation and non-excitation of the coil (21). The case (9) houses the coil (21), the bobbin (22), the fixed contact (F1), and the movable contact (M1) inside. At least a part of the main circuit components electrically connected to the fixed contact portion (400) and the movable spring (31) is disposed above the bobbin (22). The bobbin (22) includes a main body portion (61) around which the coil (21) is wound, and an upper flange portion (62) provided on the upper part of the main body portion (61). The upper flange portion (62) includes a first wall portion (64) provided on a first side along a second axis (A2) intersecting the first axis (A1), and a second wall portion (65) provided on a second side along the second axis (A2) and facing the first wall portion (64) at a third axis (A3) intersecting the first axis (A1) and the second axis (A2). The first wall portion (64) has a first recess (643) recessed along the first axis (A1). The second wall portion (65) has a second recess (653) recessed along the first axis (A1). The case (9) includes a case body (90) that constitutes the outer contour of the case (9). The case (9) includes a first protrusion portion (961) at least a part of which faces the first wall portion (64) at the third axis (A3), and a first connection portion (962) connected to the first protrusion portion (961) and at least a part of which is inserted into the first recess (643). The case (9) includes a second protrusion portion (971) at least a part of which faces the second wall portion (65) at the third axis (A3), and a second connection portion (972) connected to the second protrusion portion (971) and at least a part of which is inserted into the second recess (653).

[0176] According to this aspect, the first ridge portion (961), the first wall portion (64), the second ridge portion (971), and the second wall portion (65) can increase the insulation distance between the fixed contact portion (400) and the movable spring (31), and the coil (21). Thereby, it is possible to increase the insulation distance between the coil (21) and the main circuit component (the conductive component electrically connected to the contact device including the fixed contact F1 and the movable contact M1). Further, the first connection portion (962) of the case (9) and the first recess (643) of the first wall portion (64), and / or the second connection portion (972) of the case (9) and the second recess (653) of the second wall portion (65) can position the case (9) with respect to the bobbin (22). Further, it is possible to suppress the excessive movement of the contact pole (33) due to an external impact, and it is possible to suppress the deformation of the movable spring (31) fixed to the contact pole (33).

[0177] The electromagnetic relay (100, 100A) of the second aspect further includes an insulating member (7) disposed between the fixed contact portion (400) and the coil (21) in the first aspect.

[0178] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the main circuit component.

[0179] In the electromagnetic relay (100, 100A) of the third aspect, in the second aspect, the insulating member (7) includes an insulating wall portion (70) along the first axis (A1).

[0180] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the main circuit component.

[0181] In the electromagnetic relay (100, 100A) of the fourth aspect, in the third aspect, the insulating wall portion (70) is between the fixed contact (F1) and the center of the coil (21) on the second axis (A2).

[0182] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the main circuit component.

[0183] In the electromagnetic relay (100, 100A) of the fifth aspect, in any one of the first to fourth aspects, the first wall portion (64) has, as the first recess (643), two first recesses (643) located at both ends of the first wall portion (64) on the second axis (A2). The second wall portion (65) has, as the second recess (653), two second recesses (653) located at both ends of the second wall portion (65) on the second axis (A2).

[0184] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the main circuit component.

[0185] In the electromagnetic relay (100, 100A) of the sixth aspect, in the fifth aspect, the case (9) includes, as the first connection portions (962), two first connection portions (962) respectively inserted into the two first recesses (643). The case (9) includes, as the second connection portions (972), two second connection portions (972) respectively inserted into the two second recesses (653). A first recess (96) into which the first wall portion (64) is inserted is formed by the case body (90), the two first connection portions (962), and the first protrusion (961). A second recess (97) into which the second wall portion (65) is inserted is formed by the case body (90), the two second connection portions (972), and the second protrusion (971).

[0186] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the main circuit component.

[0187] In the electromagnetic relay (100A) of the seventh aspect, in any one of the first to sixth aspects, the first wall portion (64) and the second wall portion (65) are asymmetric in top view.

[0188] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the main circuit component according to the positional relationship between the coil (21) and the main circuit component.

[0189] In the electromagnetic relay (100, 100A) of the eighth aspect, in any one of the first to seventh aspects, the bobbin (22) further includes a third wall portion (66) extending along the third axis (A3) on the upper flange portion (62).

[0190] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the main circuit component.

[0191] In the electromagnetic relay (100, 100A) of the ninth aspect, in any one of the first to eighth aspects, the fixed contact (F1) and the movable contact (M1) are provided above the bobbin (22).

[0192] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the fixed contact (F1) and the movable contact (M1).

[0193] In the electromagnetic relay (100, 100A) of the tenth aspect, in any one of the first to ninth aspects, the lower end of the first rib portion (961) of the case (9) is located below the upper surface of the iron core (23), and the upper end of the first wall portion (64) of the bobbin (22) is located above the upper surface of the iron core (23).

[0194] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the main circuit component.

[0195] In the electromagnetic relay (100, 100A) of the eleventh aspect, in any one of the first to tenth aspects, the lower end of the first rib portion (961) contacts the upper surface of the upper flange portion (62) of the bobbin (22) on the first axis (A1). The upper end of the first wall portion (64) is separated from the case (9) on the first axis (A1).

[0196] According to this aspect, it is possible to increase the insulation distance between the coil (21) and the main circuit component.

Explanation of Reference Numerals

[0197] 100, 100A electromagnetic relay 21 Coil 22 Bobbin 23 Iron core 25 Armature 31 Moving spring 400 Fixed contact part 61 Body part 62 Upper flange part 64 First wall part 643 First recess 65 Second wall part 653 Second recess 66 Third wall part 7 Insulating member 70 Insulating wall part 9 Case 961 First rib part 962 First connection part 971 Second rib part 972 Second connection part F1 Fixed contact M1 Moving contact A1 First shaft A2 Second shaft A3 Third shaft

Claims

1. A coil, a bobbin around which the coil is wound, a core inserted vertically along a first axis into the bobbin, a fixed contact portion having a fixed contact, a movable spring having a movable contact facing the fixed contact along the first axis, and moving between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact separates from the fixed contact in response to switching between excitation and non-excitation of the coil, a case that houses the coil, the bobbin, the fixed contact, and the movable contact therein, comprising: at least a part of the main circuit components electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin, the bobbin has a main body portion around which the coil is wound, and an upper flange portion provided on an upper portion of the main body portion, comprising: the upper flange portion has a first wall portion provided on a first side along a second axis intersecting the first axis, and a second wall portion provided on a second side along the second axis and facing the first wall portion on a third axis intersecting the first axis and the second axis, comprising: the first wall portion has a first recess recessed along the first axis, the second wall portion has a second recess recessed along the first axis, the case has a case main body that constitutes an outer contour of the case, a first protrusion portion at least a part of which faces the first wall portion on the third axis, a first connection portion connected to the first protrusion portion and at least a part of which is inserted into the first recess, a second protrusion portion at least a part of which faces the second wall portion on the third axis, a second connection portion connected to the second protrusion portion and at least a part of which is inserted into the second recess, comprising: the first wall portion and the second wall portion are asymmetric in top view, an electromagnetic relay.

2. A coil, a bobbin around which the coil is wound, a core inserted vertically along a first axis into the bobbin, a fixed contact portion having a fixed contact, a movable spring having a movable contact facing the fixed contact along the first axis, and moving between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact separates from the fixed contact in response to switching between excitation and non-excitation of the coil, a case that houses the coil, the bobbin, the fixed contact, and the movable contact therein, comprising: at least a part of the main circuit components electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin, the bobbin The main body around which the coil is wound, An upper flange portion provided on the upper part of the main body, Comprising, The upper flange portion, A first wall portion provided on a first side along a second axis intersecting the first axis, A second wall portion provided on a second side along the second axis and facing the first wall portion on a third axis intersecting the first axis and the second axis, Comprising, The first wall portion has a first recess recessed along the first axis, The second wall portion has a second recess recessed along the first axis, The case, A case main body constituting the outer contour of the case, A first protrusion portion at least a part of which faces the first wall portion on the third axis, Connected to the first protrusion portion and having a first connection portion at least a part of which is inserted into the first recess, A second protrusion portion at least a part of which faces the second wall portion on the third axis, Connected to the second protrusion portion and having a second connection portion at least a part of which is inserted into the second recess, Comprising, The fixed contact and the movable contact are provided above the bobbin, Electromagnetic relay.

3. A coil, A bobbin around which the coil is wound, A core inserted vertically along a first axis into the bobbin, A fixed contact portion having a fixed contact, Having a movable contact facing the fixed contact along the first axis, and a movable spring that moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact separates from the fixed contact in response to switching between excitation and non-excitation of the coil, A case that houses the coil, the bobbin, the fixed contact, and the movable contact inside, Comprising, At least a part of the main circuit components electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin, The bobbin, The main body around which the coil is wound, An upper flange portion provided on the upper part of the main body, Comprising, The upper flange portion, A first wall portion provided on a first side along a second axis intersecting the first axis, A second wall portion provided on a second side along the second axis and facing the first wall portion on a third axis intersecting the first axis and the second axis, Comprising, The first wall portion has a first recess recessed along the first axis, The second wall portion has a second recess recessed along the first axis, The case, A case main body constituting the outer contour of the case, A first protrusion portion at least a part of which faces the first wall portion on the third axis, It is connected to the first protruding strip portion, and has a first connecting portion at least a part of which is inserted into the first recess, On the third axis, it has a second protruding strip portion at least a part of which faces the second wall portion, It is connected to the second protruding strip portion, and has a second connecting portion at least a part of which is inserted into the second recess, and includes, The lower end of the first protruding strip portion of the case is located below the upper surface of the iron core, The upper end of the first wall portion of the bobbin is located above the upper surface of the iron core, Electromagnetic relay.

4. A coil, A bobbin around which the coil is wound, An iron core inserted vertically along the first axis into the bobbin, A fixed contact portion having a fixed contact, It has a movable contact facing the fixed contact along the first axis, and according to the switching between excitation and non-excitation of the coil, the movable contact moves between a closed position where it contacts the fixed contact and an open position where it separates from the fixed contact, and a movable spring, A case that houses the coil, the bobbin, the fixed contact, and the movable contact inside, and includes, At least a part of the main circuit components electrically connected to the fixed contact portion and the movable spring is arranged above the bobbin, The bobbin, A main body portion around which the coil is wound, An upper flange portion provided on the upper part of the main body portion, and includes, The upper flange portion, A first wall portion provided on a first side along a second axis intersecting the first axis, It is provided on a second side along the second axis, and on a third axis intersecting the first axis and the second axis, it has a second wall portion facing the first wall portion, and includes, The first wall portion has a first recess recessed along the first axis, The second wall portion has a second recess recessed along the first axis, The case, A case body that constitutes the outer contour of the case, On the third axis, it has a first protruding strip portion at least a part of which faces the first wall portion, It is connected to the first protruding strip portion, and has a first connecting portion at least a part of which is inserted into the first recess, On the third axis, it has a second protruding strip portion at least a part of which faces the second wall portion, It is connected to the second protruding strip portion, and has a second connecting portion at least a part of which is inserted into the second recess, and includes, The lower end of the first protruding strip portion contacts the upper surface of the upper flange portion of the bobbin on the first axis, The upper end of the first wall portion is separated from the case on the first axis, Electromagnetic relay.

5. It further includes an insulating member arranged between the fixed contact portion and the coil. The electromagnetic relay according to any one of claims 1 to 4.

6. The insulating member includes an insulating wall portion along the first axis. The electromagnetic relay according to claim 5.

7. The insulating wall portion is between the fixed contact and the center of the coil on the second axis. The electromagnetic relay according to claim 6.

8. The first wall portion has two first recesses located at both ends of the first wall portion on the second axis as the first recesses. The second wall portion has two second recesses located at both ends of the second wall portion on the second axis as the second recesses. The electromagnetic relay according to any one of claims 1 to 7.

9. The case includes two first connection portions respectively inserted into the two first recesses as the first connection portions. includes two second connection portions respectively inserted into the two second recesses as the second connection portions. A first recess into which the first wall portion is inserted is formed by the case body, the two first connection portions, and the first rib portion. A second recess into which the second wall portion is inserted is formed by the case body, the two second connection portions, and the second rib portion. The electromagnetic relay according to claim 8.

10. The bobbin further includes a third wall portion extending along the third axis on the upper flange portion. The electromagnetic relay according to any one of claims 1 to 9.

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