CN115910691A - Electromagnetic relay - Google Patents

Abstract

The application provides an electromagnetic relay, it includes: a coil; a bobbin around which the coil is wound; a core extending vertically and penetrating the frame; a fixed contact part having a fixed contact; a movable spring having a movable contact point opposed to the fixed contact point, moving between a closed position where the movable contact point is in contact with the fixed contact point and an open position where the movable contact point is separated from the fixed contact point, in accordance with switching of excitation and non-excitation of the coil; and a case that houses the coil, the bobbin, the fixed contact, and the movable contact therein. At least a part of main circuit members electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin, and 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.

Description

Electromagnetic relay

Technical Field

The present disclosure relates generally to electromagnetic relays, and more particularly to an electromagnetic relay including a contact arrangement including fixed contacts and movable contacts and an electromagnet arrangement including a coil.

Background

Patent document 1 discloses an electromagnetic relay. The electromagnetic relay is composed of an electromagnetic relay main body and a cover covering the electromagnetic relay main body. The electromagnetic relay main body is composed of the following components: an electromagnetic block including a movable contact spring having a coil and oscillating by a current flowing to the coil; two fixed contact terminals each having a fixed contact; a backstop having two movable contact point contact parts; and a base block that holds the electromagnetic block, the fixed contact terminal, and the backstop.

The yoke of the electromagnetic block is formed in a substantially L-shape, and the top end of the long side provided in parallel with the base portion of the base block is bifurcated. The movable contact spring of the electromagnetic block is a conductive strip plate member that is bent in a substantially L-shape so as to be elastically deformable, and a plate-shaped armature that is attracted by magnetic force is fixed to the inside of a middle region of one side thereof.

Documents of the prior art

Patent literature

Patent document 1: japanese patent laid-open No. 2009-289678

Disclosure of Invention

In an electromagnetic relay, it is sometimes desirable to increase the insulation distance between a conductive member electrically connected to a contact device and a coil.

An object of the present disclosure is to provide an electromagnetic relay capable of increasing an insulation distance between a coil and a conductive member electrically connected to a contact device.

In the present disclosure, terms indicating directions such as "up", "down", "left", "right", "front", "rear", and the like are sometimes used for description. These directions merely represent relative positional relationships and do not limit the present disclosure thereby. For example, when the electromagnetic relay 100 of the present disclosure is provided to be rotatable, the direction of the electromagnetic relay 100 in a state of being actually used may be different from the direction of the electromagnetic relay 100 described in the present disclosure.

An electromagnetic relay according to an aspect of the present disclosure includes: a coil; a bobbin around which the coil is wound; a core extending vertically and penetrating the bobbin; a fixed contact portion having a fixed contact; a movable spring having a movable contact point opposed to the fixed contact point, moving between a closed position where the movable contact point is in contact with the fixed contact point and an open position where the movable contact point is separated from the fixed contact point, in accordance with switching of excitation and non-excitation of the coil; and a case that houses the coil, the bobbin, the fixed contact, and the movable contact inside, and at least a part of a main circuit member electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin, the bobbin including: a main body portion around which the coil is wound; and an upper flange portion provided on an upper portion of the body portion, the upper flange portion including: a1 st wall portion extending upward; and a2 nd wall portion extending upward and facing the 1 st wall portion, the 1 st wall portion having a1 st recess, the 2 nd wall portion having a2 nd recess, the housing including: a case main body constituting an outline of the case; a1 st protruding strip part which is arranged on the inner side of the shell main body and at least partially opposite to the 1 st wall part; a1 st connecting portion connected to the 1 st protruding portion and at least partially inserted into the 1 st recess; a2 nd protruding strip portion provided on the inner side of the case main body and at least partially facing the 2 nd wall portion; and a2 nd connecting portion provided inside the case main body, connected to the 2 nd ridge portion, and at least partially inserted into the 2 nd recessed portion.

According to the present disclosure, there is an advantage that an electromagnetic relay capable of increasing an insulation distance between a coil and a conductive member electrically connected to a contact device can be provided.

Drawings

Fig. 1 is a perspective view of an electromagnetic relay according to an embodiment.

Fig. 2 is an exploded perspective view of the electromagnetic relay.

Fig. 3 is an exploded perspective view of a relay main body included in the electromagnetic relay.

Fig. 4 is an exploded perspective view of the main body block of the relay main body.

Fig. 5 is an exploded perspective view of the electromagnet block included in the main body block.

Fig. 6 is a plan view of the bobbin of the electromagnet block.

Fig. 7 is a perspective view of the above-described bobbin.

Fig. 8 is a perspective view of the insulating member of the electromagnet block.

Fig. 9 is a sectional view of the electromagnet block.

Fig. 10A is a sectional view of the relay main body described above.

Fig. 10B is an enlarged view of a portion B1 of fig. 10A.

Fig. 10C is an enlarged view of a portion B2 of fig. 10A.

Fig. 10D is an enlarged view of a portion B3 of fig. 10A.

Fig. 11 is an exploded perspective view of the movable block included in the main block.

Fig. 12 is an exploded perspective view of the fixed block of the relay main body.

Fig. 13 is a perspective view of the holding base of the fixed block.

Fig. 14 is a perspective view of a housing of the electromagnetic relay.

Fig. 15 is a sectional view of the electromagnetic relay.

Fig. 16A is a sectional view of the electromagnetic relay.

Fig. 16B is an enlarged view of a portion B4 of fig. 16A.

Fig. 17 is a plan view of a bobbin included in the electromagnetic relay according to modification 1.

Fig. 18 is a sectional view of the electromagnetic relay.

Description of the reference numerals

100. 100A, an electromagnetic relay; 21. a coil; 22. 22A, a framework; 23. 23A, an iron core; 24. an insulating member; 241. a main body part; 25. a yoke; 251. 1 st yoke iron; 252. a2 nd yoke iron; 31. a movable spring; 400. a fixed contact part; 61. a main body portion; 62. 62A, an upper flange portion; 64. 64A, a1 st wall portion; 643. 1 st recess; 65. 65A, the 2 nd wall portion; 653. a2 nd recess; 66. a3 rd wall part; 7. an insulating member; 70. an insulating wall portion; 9. a housing; 961. 961A, 1 st protruding strip; 962. 962A, connecting part 1; 971. 971A, 2 nd protruding strip; 972. 972A, connection 2; f1, fixing a contact; m1, a movable contact; a1, A1 st axis; a2, A2 nd shaft; a3, 3 rd axis.

Detailed Description

An electromagnetic relay according to an embodiment of the present disclosure will be described with reference to the drawings. The drawings described in the following embodiments are schematic diagrams, and the ratio of the size and thickness of each component in the drawings is not limited to a certain ratio reflecting the actual dimensions.

(1) Summary of the invention

As shown in fig. 2 to 6, 10A to 10D, and 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 vertically penetrates the frame 22 along the 1 st axis A1. The fixed contact part 400 has a fixed contact F1. The movable spring 31 has a movable contact M1 opposed to the fixed contact F1 along the 1 st axis A1. The movable spring 31 moves between a closed position where the movable contact M1 is in contact with the fixed contact F1 and an open position where the movable contact M1 is separated from the fixed contact F1, in accordance with switching of excitation and non-excitation of the coil 21. The case 9 houses therein the coil 21, the bobbin 22, the fixed contact F1, and the movable contact M1. At least a part of the main circuit members electrically connected to the fixed contact portion 400 and the movable spring 31 is disposed above the bobbin 22. The skeleton 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 body portion 61. The upper flange portion 62 includes: a1 st wall part 64 provided on A1 st side along A2 nd axis A2 intersecting the 1 st axis A1; and A2 nd wall part 65 provided on the 2 nd side along the 2 nd axis A2 and facing the 1 st wall part 64 on the 3 rd axis A3 intersecting the 1 st axis A1 and the 2 nd axis A2. The 1 st wall portion 64 has A1 st recess 643 recessed along the 1 st axis A1. The 2 nd wall part 65 has a2 nd recess 653 recessed along the 1 st axis A1. The housing 9 includes a housing main body 90 constituting an outline of the housing 9. The housing 9 includes: a1 st projection 961 at least partially facing the 1 st wall 64 on the 3 rd axis A3; and a1 st connecting portion 962 connected to the 1 st protruding strip portion 961 and inserted at least partially into the 1 st recess 643. The housing 9 includes: a2 nd protrusion 971 at least partially opposing the 2 nd wall 65 on the 3 rd axis A3; and a2 nd connecting portion 972 connected to the 2 nd protrusion portion 971 and at least partially inserted into the 2 nd recessed portion 653.

In the electromagnetic relay 100 according to the present embodiment, the 1 st connecting portion 962 of the case 9 is inserted into the 1 st recess 643 of the 1 st wall portion 64 of the upper flange portion 62 of the bobbin 22, and the 1 st protruding strip portion 961 of the case 9 faces the 1 st wall portion 64. In the electromagnetic relay 100, the 2 nd connecting portion 972 of the case 9 is inserted into the 2 nd recessed portion 653 of the 2 nd wall portion 65 of the upper flange portion 62 of the bobbin 22, and the 2 nd ridge portion 971 of the case 9 faces the 2 nd wall portion 65. Therefore, the insulation distance between the fixed contact portion 400 and the movable spring 31 and the coil 21 can be increased by the 1 st protruding strip portion 961 and the 1 st wall portion 64 (or the 2 nd protruding strip portion 971 and the 2 nd wall portion 65). Thus, in the electromagnetic relay 100 of the present embodiment, the insulation distance between the coil 21 and the conductive member electrically connected to the contact device including the movable contact M1 and the fixed contact F1 can be increased.

In the electromagnetic relay 100 according to the present embodiment, the housing 9 can be positioned with respect to the bobbin 22 by the 1 st recessed portion 643 of the 1 st wall portion 64 and the 1 st connecting portion 962 of the housing 9 and/or the 2 nd recessed portion 653 of the 2 nd wall portion 65 and the 2 nd connecting portion 972 of the housing 9.

In the electromagnetic relay 100 according to the present embodiment, excessive movement of the armature 33 due to an external impact can be suppressed, and deformation of the movable spring 31 fixed to the armature 33 can be suppressed.

(2) Details of

Hereinafter, the electromagnetic relay 100 according to the present embodiment will be described in detail with reference to the drawings.

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

The electromagnetic relay 100 is mounted on, for example, an electric vehicle. The electromagnetic relay 100 is used, for example, for turning on and off a circuit of a charging wire of an electric vehicle. The contact arrangement is plugged into the circuit of the charging cord.

As shown in fig. 1 and 2, the electromagnetic relay 100 includes a relay main body 1 and a case 9.

As shown in fig. 2 to 4, the relay main body 1 is configured by combining a plurality of blocks. The relay main body 1 includes an electromagnet block 2, a movable block 3, and a fixed block 4, and is configured by joining these blocks. Hereinafter, a block in which the movable block 3 is coupled to the electromagnet block 2 may be referred to as a main block 10 (see fig. 3).

As shown in fig. 3 and 4, the main body block 10 includes a coil 21, a core 23 inserted into the coil 21, and an armature 33.

Hereinafter, a virtual axis along which the core 23 extends is also referred to as A1 st axis A1. The armature 33 is aligned with the core 23 along the 1 st axis A1. The imaginary axis along which the main body block 10 and the fixed block 4 are aligned is also referred to as A2 nd axis A2. The 2 nd axis A2 intersects the 1 st axis A1, and is orthogonal here. An imaginary axis intersecting both the 1 st axis A1 and the 2 nd axis A2 is also referred to as A3 rd axis A3. Here, the 3 rd axis A3 is orthogonal to both the 1 st axis A1 and the 2 nd axis A2. The side of the 1 st axis A1 on which the armature 33 is located when viewed from the core 23 is also referred to as "upper", and the side of the 1 st axis A1 on which the core 23 is located when viewed from the armature 33 is also referred to as "lower". Further, the side of the 2 nd axis A2 on which the fixed block 4 is located when viewed from the main body block 10 is also referred to as "left", and the side of the 2 nd axis A2 on which the main body block 10 is located when viewed from the fixed block 4 is also referred to as "right". The two sides on the 3 rd axis A3 are also referred to as "front" and "rear", respectively.

In the present disclosure, "top view" means a view from above along the 1 st axis A1, "side view" means a view from right or left along the 2 nd axis A2, and "front view" means a view from front along the 3 rd axis A3.

As shown in fig. 3, the fixed block 4 is fixed to the main block 10 by being assembled to the main block 10 from the left side along the 2 nd axis A2. In the present disclosure, "fixed" may include both detachable fixation by fitting or the like and non-detachable fixation by adhesion, welding or the like.

(2.1) electromagnet Block

As shown in fig. 4 and 5, the electromagnet block 2 includes a coil 21, a bobbin 22, a core 23, an insulating member 24, a yoke 25, and two coil terminals 26.

As shown in fig. 5, the frame 22 includes a main body 61, an upper flange 62 provided on an upper portion of the main body 61, and a lower flange 63 provided on a lower portion of the main body 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 electrically insulating synthetic resin.

The body portion 61 is a hollow cylindrical shape whose axis line is along the 1 st axis A1. The coil 21 is wound around the body portion 61. The axis of the coil 21 (an imaginary axis around which the coil 21 is wound) substantially coincides with the axis of the main body 61.

As shown in fig. 5 and 6, the upper flange portion 62 includes a plate-like upper flange main body 621 having a substantially rectangular shape in plan view. The upper flange body 621 has a circular hole 622 connected to the inner space of the body 61 on the left side of the center thereof. An annular support table portion 623 projecting upward is provided on the upper surface of the upper flange main body 621 around the hole 622.

The upper flange portion 62 has a1 st wall portion 64, a2 nd wall portion 65, and a3 rd wall portion 66 on the upper surface of the upper flange main body 621.

The 1 st wall portion 64 is disposed along the 1 st edge (front edge) of the upper flange main body 621 along the 2 nd axis A2. The 1 st wall portion 64 protrudes upward from the upper surface of the upper flange main body 621. The 1 st wall part 64 is continuously formed along the 2 nd axis A2. The 1 st wall portion 64 is provided at a position overlapping an imaginary line extending forward from the center of the hole 622 of the upper flange main body 621 along the 3 rd axis A3.

The 1 st wall part 64 includes a base 641 formed on an upper surface of the upper flange main body 621 and a rib 642 formed on an upper surface of the base 641. The base 641 has a substantially rectangular parallelepiped shape extending along the 2 nd axis A2. The ribs 642 are substantially bar-shaped extending along the 2 nd axis A2.

The thickness (dimension along the 3 rd axis A3) of the rib 642 is thinner than that of the base 641. The front surface (outer surface) of the base 641 is flush (flush) with the front surface of the rib 642. Therefore, there is a step between the rear surface (inner surface) of the rib 642 and the base 641.

The length (dimension along the 2 nd axis A2) of the rib 642 is shorter than the length of the base 641. On the 2 nd axis A2, the rib 642 is located at substantially the center of the upper surface of the base 641. Accordingly, there is a step between the left side surface of the rib 642 and the base 641, and a step between the right side surface of the rib 642 and the base 641. A recess (1 st recess 643) is formed at a step between the base 641 and the rib 642. Thus, the 1 st wall portion 64 has A1 st recess 643 recessed along the 1 st axis A1. The 1 st wall portion 64 has two 1 st recesses 643 as the 1 st recesses 643 at both ends (left and right ends) of the 1 st wall portion 64 on the 2 nd axis A2.

The 2 nd wall portion 65 is disposed along the 2 nd edge (rear edge) of the upper flange body 621 along the 2 nd axis A2. The 2 nd wall portion 65 protrudes upward from the upper surface of the upper flange main body 621. The 2 nd wall portion 65 is continuously formed along the 2 nd axis A2. The 2 nd wall portion 65 is provided at a position overlapping an imaginary line extending rearward along the 3 rd axis A3 from the center of the hole 622 of the upper flange main body 621.

The 2 nd wall portion 65 faces the 1 st wall portion 64 through the hole 622 on the 3 rd axis A3. In a plan view, the 1 st wall portion 64 and the 2 nd wall portion 65 are symmetrical.

The 2 nd wall part 65 includes a base portion 651 formed on an upper surface of the upper flange main body 621 and a rib 652 formed on an upper surface of the base portion 651. The base 651 has a substantially rectangular parallelepiped shape extending along the 2 nd axis A2. The rib 652 is a substantially rib-like shape extending along the 2 nd axis A2.

The rib 652 has a thickness (dimension along the 3 rd axis A3) thinner than that of the base 651. The rear surface (outer surface) of the base 651 is flush with (flush with) the rear surface of the rib 652. Therefore, there is a step between the front surface (inner side surface) of the rib 652 and the base 651.

The length of the rib 652 (dimension along the 2 nd axis A2) is shorter than the length of the base 651. On the 2 nd axis A2, the rib 652 is located at substantially the center of the upper surface of the base 651. Therefore, there is a step between the left side of the rib 652 and the base 651, and a step between the right side of the rib 652 and the base 651. A recess (2 nd recess 653) is formed at a step between the base 651 and the rib 652. Thus, the 2 nd wall part 65 has the 2 nd recessed part 653 recessed along the 1 st axis A1. The 2 nd wall part 65 has two 2 nd recesses 653 located at both ends (left and right ends) of the 2 nd axis A2 of the 2 nd wall part 65 as the 2 nd recesses 653.

The 3 rd wall portion 66 is provided on the upper surface of the upper flange main body 621 along the 3 rd axis A3. The 3 rd wall portion 66 is disposed along the 3 rd edge (left edge) of the upper flange body 621 along the 3 rd axis A3. The 3 rd wall portion 66 protrudes upward from the upper surface of the upper flange main body 621. The 3 rd wall 66 is located on the left side of the hole 622.

The 3 rd wall portion 66 has a substantially rectangular parallelepiped shape extending along the 3 rd axis A3. The height (dimension along the 1 st axis A1) of the 3 rd wall portion 66 is substantially equal to the height of the base 641 of the 1 st wall portion 64 and is substantially equal to the height of the base 651 of the 2 nd wall portion 65.

The 3 rd wall part 66 connects between the 1 st end (left end) of the 1 st wall part 64 and the 1 st end (left end) of the 2 nd wall part 65. In more detail, the 3 rd wall part 66 connects between the rear surface of the 1 st end (left end) of the base part 641 of the 1 st wall part 64 and the front surface of the 1 st end (left end) of the base part 651 of the 2 nd wall part 65. The 3 rd wall part 66 is continuously formed along the 3 rd axis A3. In the upper flange portion 62, a1 st wall portion 64, a2 nd wall portion 65, and a3 rd wall portion 66 form a C-shape in plan view.

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

The protruding plate portion 624 is a plate-like portion protruding leftward along the 2 nd axis A2 from the 3 rd edge (left piece) of the upper flange main body 621. The protruding plate 624 is flush with the upper flange main body 621.

The holding protrusion 625 is provided on the upper surface of the protruding plate 624. The holding protrusion 625 is a rib extending along the 2 nd axis A2 at a position near the front end of the upper surface of the protruding plate portion 624. One end of the holding projection 625 is connected to the left side surface of the 3 rd wall portion 66.

The positioning portion 626 is a projection provided on the upper surface of the upper flange main body 621 along the 3 rd axis A3. The positioning portion 626 is provided along the 4 th side (right side) along the 3 rd axis A3 in the upper flange main body 621. The length (dimension along the 3 rd axis A3) of the positioning portion 626 is shorter than the length of the 4 th side (right side) of the upper flange main body 621. The positioning portion 626 is provided at the center of the 4 th side (right side) of the upper flange main body 621 on the 3 rd axis A3. The 1 st end (front end) of the positioning portion 626 and the 2 nd end (right end) of the 1 st wall portion 64 are not connected, and a gap is present therebetween. The 2 nd end (rear end) of the positioning portion 626 and the 2 nd end (right end) of the 2 nd wall portion 65 are not connected, and a gap is present therebetween.

As shown in fig. 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 63 is open on the side (right side) of the 2 nd axis A2. That is, the lower flange portion 63 has an opening 630 on the right side surface.

The upper wall portion 631 has a substantially rectangular plate shape in plan view. The upper wall 631 has a circular hole 636 at the center thereof to connect the internal space of the body 61 and the internal space of the lower flange 63.

The lower wall 632 is substantially rectangular plate-shaped in plan view. The lower wall portion 632 has a circular hole 637 in the center thereof to connect the inner space and the outer space of the lower flange portion 63. 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 in plan view.

The lower wall portion 632 is longer (dimension along the 2 nd axis A2) than the upper wall portion 631. The right end of the lower wall portion 632 protrudes rightward with respect to the right end of the upper wall portion 631 in plan view.

An engagement projection 638 projecting downward is provided at the center of the 3 rd axis A3 at the left end of the lower surface of the lower wall 632.

The front wall 633 and the rear wall 634 are substantially rectangular plate-shaped in front view. 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.

The left wall 635 has a substantially rectangular plate shape in side view. 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.

The lower flange portion 63 has two holding grooves 639 for mounting the two coil terminals 26, respectively, at both ends (front end portion and rear end portion) of the 3 rd shaft A3 at the left end. The holding groove 639 is formed across the upper wall portion 631, the left wall portion 635, and the lower wall portion 632.

As shown in fig. 4 and 5, the two coil terminals 26 are 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 1 st end of the coil 21, and the other is connected to the 2 nd end of the coil 21.

As shown in fig. 5, the coil terminal 26 includes a1 st terminal portion 261 to be connected to the coil 21, a2 nd terminal portion 262 to be connected to an external device, and a coupling portion 263 to couple the 1 st terminal portion 261 and the 2 nd terminal portion 262. First terminal portion 261 protrudes upward from upper wall portion 631 of lower flange portion 63. The 2 nd terminal portion 262 protrudes downward from the lower wall portion 632 of the lower flange portion 63. As shown in fig. 1, the 2 nd terminal portion 262 is exposed from the housing 9 to the lower side.

As shown in fig. 5, the core 23 is formed in a cylindrical shape. The core 23 is inserted into the frame 22 vertically along the 1 st axis A1. The core 23 is inserted into the main body portion 61 of the bobbin 22. The core 23 has a disc-shaped magnetic pole portion 231 at one end (upper end) on the 1 st 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 table portion 623 of the upper flange portion 62 of the frame 22. The core 23 has a small-diameter portion 232 having a relatively small diameter at a lower end portion thereof.

As shown in fig. 4 and 5, the coil 21 is wound around the bobbin 22. The coil 21 is wound around the main body portion 61 of the bobbin 22. Thus, the coil 21 is wound around the core 23.

The 1 st end of the coil 21 is connected to one of the two coil terminals 26, and the 2 nd end of the coil 21 is connected to the other of the two coil terminals 26.

As shown in fig. 5, the yoke 25 includes a1 st yoke 251 and a2 nd yoke 252.

The 1 st yoke 251 has a rectangular plate shape extending along the 1 st axis A1. The 2 nd yoke 252 is a rectangular plate shape extending along the 2 nd axis A2. The lower end of the 1 st yoke 251 is connected to the right end of the 2 nd yoke 252, and the 1 st yoke 251 and the 2 nd yoke form an inverted L-shape in front view.

The 1 st yoke 251 has two fixing protrusions 253 for fixing the movable spring 31 at both end portions (front end portion and rear end portion) of the 3 rd shaft A3 at a right surface thereof. The fixing protrusion 253 can be formed by, for example, pressing out a portion corresponding to the fixing protrusion 253 in the left surface of the 1 st yoke 251 from the left side to the right direction.

The 2 nd yoke 252 has a through hole 254. The through hole 254 penetrates the 2 nd yoke 252 along the 1 st axis A1.

As shown in fig. 4 and 5, the 1 st yoke 251 is disposed on the right side of the coil 21. The 2 nd yoke 252 is inserted into the inner space of the lower flange portion 63 of the bobbin 22 through the opening 630 from the right side. The core 23 (more specifically, the small diameter portion 232) is inserted into the through hole 254 of the 2 nd yoke 252 from above (see fig. 9 and 10A). Thereby, the core 23 is fixed to the yoke 25. The yoke 25 forms a magnetic path together with the core 23.

The length (dimension along the 1 st axis A1) of the 1 st yoke 251 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 (dimension along the 3 rd axis A3) of the 1 st yoke 251 is substantially the same as the diameter of the coil 21. The 1 st yoke 251 covers substantially the entire coil 21 in a side view from the right side.

As shown in fig. 4 and 5, the insulating member 24 is disposed between the bobbin 22 and the yoke 25. The insulating member 24 is located between the coil 21 and the yoke 25. The insulating member 24 insulates the coil 21 and the yoke 25 from each other. The insulating member 24 covers the coil 21 from the right side. The insulating member 24 is covered from the right by a yoke 25.

As shown in fig. 5 and 8, the insulating member 24 includes a body 241, a covering portion (1 st covering portion) 242, a1 st connecting portion 243, a2 nd covering portion 244, a2 nd connecting portion 245, a pair of 1 st protrusions 246, and a pair of 2 nd protrusions 247. The body 241, the 1 st covering portion 242, the 1 st connecting portion 243, the 2 nd covering portion 244, the 2 nd connecting portion 245, the pair of 1 st protruding portions 246, and the pair of 2 nd protruding portions 247 are integrally formed as a molded body of a synthetic resin having electrical insulation properties.

The main body 241 has a substantially C-shaped cross section perpendicular to the 1 st axis A1. The body 241 faces the right side surface of the coil 21 and covers the coil 21 from the right side. The left surface of the main body 241 has a central portion extending forward and backward along the 3 rd axis A3 in cooperation with the curve of the right side surface of the coil 21, and both end portions extending leftward and rightward and forward and rearward from both ends of the 3 rd axis A3 of the central portion in an inclined manner with respect to the central portion. Further, the main body portion 241 is covered with the 1 st yoke 251 from the right side.

The 1 st covering portion 242 is located below the body portion 241. The 1 st covering part 242 has a plate shape having a width along the 2 nd axis A2.

The 1 st covering part 242 covers at least a part of the 2 nd yoke 252. The 1 st covering portion 242 covers at least a part of the 2 nd yoke 252 from above. The 1 st cover part 242 covers a portion of the 2 nd yoke 252 near a right end connected to the 1 st yoke 251 (see fig. 4). The 1 st cover part 242 integrally has an upper cover part 291 covering the upper surface of the 2 nd yoke 252, a front cover part 292 covering the front surface of the 2 nd yoke 252, and a rear cover part 293 covering the rear surface of the 2 nd yoke 252. That is, the 1 st covering part 242 covers the 2 nd yoke 252 from the 3 directions of the upper and front and rear. The portion of the 2 nd yoke 252 where the through hole 254 is formed is not covered with the 1 st covering part 242 but is exposed from the 1 st covering part 242.

The 1 st covering portion 242 is inserted into the inner space of the lower flange portion 63 of the frame 22 through the opening portion 630 from the right side together with the 2 nd yoke 252. For example, after the 1 st covering portion 242 is inserted into the inner space of the lower flange portion 63 through the opening 630 from the right side, the 2 nd yoke 252 is inserted into the inner space of the lower flange portion 63 through the opening 630 from the right side below the 1 st covering portion 242. Here, the 1 st covering portion 242 is press-fitted into the lower flange portion 63 through the opening portion 630. The 2 nd yoke 252 is inserted into the internal space of the lower flange portion 63 through the opening 630 and is press-fitted between the lower wall portion 632 of the lower flange portion 63 and the 1 st covering portion 242. Thereby, the insulating member 24 and the yoke 25 are fixed to the frame 22. Since the insulating member 24 and the yoke 25 are fixed to the bobbin 22, even if the electromagnetic relay 100 vibrates, a defect such as chipping is less likely to occur in the bobbin 22 or the insulating member 24.

Fig. 9 shows a horizontal cross-sectional view of the electromagnet block 2 on an imaginary plane passing through the lower flange portion 63. As shown in fig. 9, the lower flange portion 63 of the bobbin 22 includes a bobbin-side guide portion 69. The frame-side guide 69 is an inclined surface formed on the right side surface of the front wall 633 and the rear wall 634 at the entrance of the opening 630 of the lower flange 63. The frame-side guide portion 69 guides the 1 st covering portion 242 of the insulating member 24. Since the lower flange portion 63 has the bobbin-side guide portion 69, the insulating member 24 can be easily attached to the bobbin 22.

As shown in fig. 9, the 1 st covering portion 242 of the insulating member 24 includes an insulating member-side guide portion 240. The insulating member side guide 240 is an inclined surface formed on the rear side surfaces of the front side covering portion 292 and the rear side covering portion 293 of the 1 st covering portion 242. The insulating member-side guide portion 240 guides the 2 nd yoke 252. Since the insulating member 24 has the insulating member side guide portion 240, the attachment of the yoke 25 to the insulating member 24 and, further, the attachment of the yoke 25 to the bobbin 22 becomes easy. Further, the 2 nd yoke 252 has inclined surfaces 255 at both corner portions of the tip end (left end) thereof. Since the 2 nd yoke 252 has the inclined surface 255, the yoke 25 can be easily attached to the insulating member 24.

In a state where the 1 st cover part 242 and the 2 nd yoke 252 are inserted into the opening 630, as shown in fig. 10A, the lower wall part 632 of the lower flange part 63, the 2 nd yoke 252, the 1 st cover part 242 of the insulating member 24, the upper wall part 631 of the lower flange part 63, and the coil 21 are arranged in this order from below along the 1 st axis A1. Therefore, the upper surface of the 1 st 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. Further, the lower surface of the 2 nd 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, the upper wall portion 631 of the lower flange portion 63 and the 1 st cover portion 242 (upper cover portion 291) of the insulating member 24 are interposed between the coil 21 and the 2 nd yoke 252 on the 1 st axis A1. Therefore, in a cross section orthogonal to the 3 rd axis A3, the shortest path between the coil 21 and the 2 nd yoke 252 becomes a path shown by a two-dot chain line L1 in fig. 10B. Thereby, the insulation distance between the coil 21 and the yoke 25 can be increased as compared with the electromagnetic relay of the comparative example in which the insulating member does not have the 1 st covering portion. In fig. 10B, for convenience of explanation, the components are drawn so as to form a gap therebetween. Further, as described above, by covering the 1 st covering portion 242 with the 2 nd yoke 252 from 3 directions (upward, forward, and rearward), the insulation distance between the coil 21 and the 2 nd yoke 252 can be further increased. In addition, since the 1 st covering portion 242 does not cover the lower surface of the 2 nd yoke 252, an increase in the dimension of the electromagnet block 2 along the 1 st axis A1 can be suppressed.

As shown in fig. 8, the 1 st connecting part 243 connects the body part 241 and the 1 st covering part 242. The 1 st connecting portion 243 connects a lower edge of the right end of the body portion 241 and a right end of the upper surface of the 1 st covering portion 242.

The 2 nd covering part 244 is positioned above the body part 241. The 2 nd covering portion 244 has a plate shape having a width along the 2 nd axis A2.

The No. 2 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 skeleton 22. As shown in fig. 4, the 2 nd covering portion 244 covers a portion of the right end in the upper surface of the upper flange main body 621. The magnetic pole portion 231 of the core 23 is not covered with the 2 nd covering portion 244 but is exposed.

The 2 nd covering portion 244 has a step at each of the left front end and the left rear end in a plan view. The right end of the base 641 of the 1 st wall part 64 and the right end of the base 651 of the 2 nd wall part 65 of the upper flange part 62 are fitted into these stepped parts. As shown in fig. 4 and 15, the base 641 of the 1 st wall 64, the 3 rd wall 66, the base 651 of the 2 nd wall 65 of the upper flange 62, and the 2 nd cover 244 of the insulating member 24 are connected in a rectangular frame shape in plan view.

As shown in fig. 4, the height position of the upper surface of the 2 nd covering portion 244 (the position on the 1 st axis A1) is substantially the same as the height position of the base 641 of the 1 st wall portion 64 of the upper flange portion 62 and the height position of the base 651 of the 2 nd wall portion 65.

As shown in fig. 8, a recess 248 is formed along the 2 nd axis A2 on the lower surface of the 2 nd covering portion 244. The positioning portions 626 of the upper flange portions 62 of the framework 22 are fitted into the recessed portions 248 along the 2 nd axis A2, thereby positioning the insulating member 24 with respect to the framework 22. As shown in fig. 10A, in a state where the positioning portion 626 is fitted in the recess 248, the upper surface of the 1 st covering portion 242 (the upper surface of the upper covering portion 291) is in contact with the lower surface of the upper wall portion 631 of the lower flange portion 63.

The 2 nd coupling part 245 couples the body part 241 and the 2 nd covering part 244. The 2 nd connecting portion 245 connects an upper edge of a right end of the body portion 241 and a right end of a lower surface of the 2 nd covering portion 244.

Grooves are formed along the 3 rd axis A3 between the 2 nd covering part 244, the 2 nd connecting part 245, and the body part 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 framework 22 is fitted into the groove.

As shown in fig. 8, the pair of 1 st protrusions 246 protrude rightward along the 2 nd axis A2 from the respective right surfaces of the front side covering portion 292 and the rear side covering portion 293 of the 1 st covering portion 242. The 1 st projection 246 has a substantially rectangular parallelepiped shape extending along the 2 nd axis A2. As shown in fig. 4, the 1 st projection 246 is placed on the upper surface of the lower wall portion 632 of the lower flange portion 63 of the frame 22. The pair of 1 st protrusions 246 cover front and rear sides of the lower end portion of the 1 st yoke 251, respectively.

The pair of 2 nd protrusions 247 protrude rightward along the 2 nd axis A2 from the front end and the rear end of the right surface of the 2 nd connection part 245, respectively. The pair of 2 nd protrusions 247 respectively cover a front side surface and a rear side surface of the upper end portion of the 1 st yoke 251.

(2.2) Movable Block

As shown in fig. 4 and 11, the movable block 3 includes a movable spring 31, a movable contact point member 32, and an armature 33.

The movable spring 31 includes a leg piece 35, a fixed piece 36, a spring piece 37, and a movable piece 38. The movable spring 31 includes 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.

The leg piece 35 is a rectangular plate shape extending along the 1 st axis A1. The two leg pieces 35 are aligned along the 3 rd axis A3. The leg pieces 35 are terminals to be connected to an external electronic device. As shown in fig. 1, the leg pieces 35 are exposed downward from the housing 9.

The fixing piece 36 is plate-shaped and extends upward from the upper end of the leg piece 35. The fixing piece 36 is a portion fixed to the yoke 25, and more specifically, a portion fixed to the 1 st yoke 251. The fixing piece 36 has two fixing holes 311 into which the two fixing protrusions 253 of the 1 st yoke 251 are inserted, respectively.

The spring piece 37 is in the shape of an inverted L turned upside down in front view. The spring piece 37 has flexibility. The spring piece 37 has a plate-shaped 1 st plate spring portion 371 extending upward from the upper end of the fixing piece 36, a bent portion 372 bent leftward from the upper end of the 1 st plate spring portion 371, and a2 nd plate spring portion 373 extending leftward from the left end of the bent portion 372.

The movable piece 38 is a plate-like piece extending leftward from the left end of the 2 nd plate spring portion 373 of the spring piece 37. A joint portion between the movable piece 38 and the spring piece 37 (the 2 nd plate spring portion 373) is bent in a V-shape in front view. The movable plate 38 can move up and down along the 1 st axis A1 in accordance with the deflection of the spring plate 37. The movable piece 38 is inclined with respect to the normal direction of the fixed piece 36.

The movable plate 38 includes an armature holding portion 381 and a contact holding portion 382. The armature holding portion 381 is located at a relatively rightward position in the movable piece 38. The contact holding portion 382 is located relatively on the left side of the movable piece 38.

The armature 33 is held by the armature holding portion 381. 3 fixing holes 313 are formed in the armature holding portion 381 aligned along the 3 rd axis A3.

The contact holding portion 382 holds a movable contact M1. The contact holding portion 382 has a through hole 314. The through hole 314 is provided in the movable spring 31 at a position relatively closer to the rear side on the 3 rd axis A3. Therefore, the center of the through hole 314 is located rearward of the center of the central fixing hole 313 among the 3 fixing holes 313.

As shown in fig. 11, the armature 33 includes an armature main body 331, a fixing protrusion 332, and a hook piece 333. The armature 33 includes 3 fixing tabs 332. Furthermore, the armature 33 comprises two hook tabs 333. The armature main body 331, the 3 fixing protrusions 332, and the two hook pieces 333 are integrally formed of a magnetic material.

The armature main body 331 is a plate shape having a substantially rectangular shape in plan view. The 3 fixing projections 332 are provided on the upper surface of the armature main body 331. The 3 fixing protrusions 332 are arranged along the 3 rd axis A3. By inserting the 3 fixing projections 332 of the armature 33 into the 3 fixing holes 313 of the armature holding portion 381 of the movable spring 31 from the lower side, the tip ends of the fixing projections 332 are crushed, and the armature 33 is fixed to the movable spring 31 (armature holding portion 381). The armature 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 armature 33.

As shown in fig. 2 and 3, in a state where the movable block 3 is fixed to the electromagnet block 2, the lower surface of the armature 33 faces the upper surface of the core 23 (the upper surface of the magnetic pole portion 231).

In a plan view, the armature 33 has A1 st end E1 and A2 nd end E2 on A2 nd axis A2 intersecting the 1 st axis A1 (see fig. 11). In the present embodiment, the 1 st end E1 is a left end, and the 2 nd end E2 is a right end.

Two hook pieces 333 are provided at the 2 nd end E2 (right end) of the armature 33. Two hook pieces 333 protrude downward from the front end and the rear end of the right side surface of the armature body 331. As shown in fig. 3, a hooking piece 333 is hooked to an upper end portion of the right surface of the 1 st yoke 251. Accordingly, the armature 33 rotates about the hook piece 333 as a fulcrum in response to the presence or absence of the attractive force between the armature and the core 23. The movable piece 38 of the movable spring 31 moves up and down along the 1 st axis A1 together with the armature main body 331.

As shown in fig. 11, the movable contact point member 32 includes a head portion 321 and a stem portion 322.

The head 321 has a circular truncated cone shape. The axis of the head 321 is along the 1 st axis A1. The lower surface of the head 321 functions as a movable contact M1. The lower surface of the movable contact member 32, which functions as the movable contact M1, is made of, for example, silver alloy (AgNi or agnno) ₂ ) And (4) forming. The movable contact member 32 is formed of a copper alloy such as tough pitch copper, for example, at a portion other than the movable contact M1. The surface (lower surface) of the movable contact point member 32 that functions as the movable contact point M1 is spherical. The surface (lower surface) of the movable contact member 32 that functions as the movable contact M1 may be planar or dome-shaped.

The stem portion 322 protrudes from the upper end of the head portion 321. The trunk portion 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 in a state where the stem portion 322 passes through the through hole 314 of the contact holding portion 382. Thereby, the movable contact point member 32 is electrically connected to the movable spring 31.

The movable contact M1 may be formed integrally with the movable spring 31. For example, a part of a metal plate constituting the movable spring 31 may be projected downward, and the tip of the projected portion may be used as the movable contact M1.

Thus, the movable contact M1 is provided on the movable spring 31 on the 1 st end E1 (left end) side of the armature 33 in plan view. The movable contact M1 moves up and down along the 1 st axis A1 together with the armature main body 331 in accordance with the movement of the armature 33 (rotation with the hook piece 333 as a fulcrum).

(2.3) fixing Block

As shown in fig. 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.

The holding base 41 has a rectangular box shape with an open right surface. As shown in fig. 12 and 13, the holding table 41 includes a left wall 45, a front wall 46, a rear wall 47, a lower wall 48, an upper wall 49, and the 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 a synthetic resin having electrical insulation.

An engagement hole 411 is formed at the right end of the lower wall 48. A recess 412 recessed leftward along the 2 nd axis A2 is formed at the upper end of the right side surface of the front wall 46. A recess 413 recessed leftward along the 2 nd axis A2 is formed at the upper end of the right side surface of the rear wall 47. A holding groove 414 extending along the 2 nd axis A2 is formed at the front end portion of the lower surface of the upper wall 49.

The front end and the rear end of the projecting plate 624 of the upper flange portion 62 of the frame 22 are inserted into the recess 412 of the front wall 46 and the recess 413 of the rear wall 47, respectively. The retaining protrusion 625 of the upper flange portion 62 of the frame 22 is inserted (herein, press-fitted) into the retaining groove 414 of the upper wall 49. The engaging hole 411 of the lower wall 48 engages with the engaging projection 638 of the lower flange 63 of the frame 22. Thereby, the fixing block 4 is combined with the main body block 10. In a state where the fixed 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).

A protruding wall portion 415 protruding upward along the 1 st axis A1 is provided on the upper surface of the upper wall 49. The ledge 415 extends fore and aft along the 3 rd axis A3.

As shown in fig. 13, a holding recess 416 recessed rightward is formed in a lower end portion of the left surface of the left wall 45. A holding recess 417 recessed rightward is formed along the 1 st axis A1 on the left surface of the rear wall 47.

The auxiliary wall 40 protrudes upward from the upper end of the front wall 46. On the left surface of the holding table 41, a holding groove 418 extending along the 1 st axis A1 is formed from the auxiliary wall 40 to the upper side portion of the front wall 46. The holding groove 418 is used to hold the auxiliary member 44.

As shown in fig. 12, the conductive member 42 includes a leg piece 421, a central piece 422, a1 st fixing piece 423, a2 nd fixing piece 424, and a holding piece 425. The conductive member 42 includes two leg pieces 421. The two leg pieces 421, the center piece 422, the 1 st fixing piece 423, the 2 nd fixing piece 424, and the holding piece 425 are integrally formed of a conductive metal material.

The leg pieces 421 are plate-shaped extending along the 1 st axis A1. The two leg pieces 421 are arranged along the 3 rd axis A3. The leg pieces 421 are terminals to be connected to an external electronic device. As shown in fig. 1, the leg pieces 421 are exposed from the housing 9 to the lower side.

The central piece 422 is a plate-like piece extending upward from the upper end of the leg piece 421. The right surface of the center piece 422 is opposed to the left surface of the left wall 45 of the holding table 41.

The 1 st fixing piece 423 is plate-shaped extending rightward along the 2 nd axis A2 from the lower end of the center piece 422. The 1 st fixing piece 423 extends from a portion between the two leg pieces 421 at a lower end of the central piece 422.

The 2 nd fixing plate 424 is plate-shaped extending rightward along the 2 nd axis A2 from the rear edge of the center plate 422. The 2 nd fixing plate 424 extends from the center on the 1 st axis A1 at the rear edge of the center plate 422.

The 1 st fixing piece 423 is inserted into the holding recess 416 of the holding base 41 from the left. The 2 nd 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.

The left wall 45 and the protruding wall portion 415 of the holding stage 41 are interposed between the conductive member 42 and the coil 21. Therefore, the holding base 41 functions as the insulating member 7 that is disposed between the coil 21 and the conductive member 42 and insulates the coil 21 and the conductive member 42 from each other. The insulating member 7 includes an insulating wall portion 70 (protruding wall portion 415) along the 1 st axis A1 (see fig. 3). The insulating wall portion 70 is located between the fixed contact F1 and the center of the coil 21 on the 2 nd axis A2.

The holding pieces 425 have a plate shape with a thickness axis along the 1 st axis A1. The retaining piece 425 extends rightward from the upper end of the central piece 422. The retaining tabs 425 are located above the upper wall 49 of the retaining table 41. The holding piece 425 has a through hole 426 at the center.

The conductive member 42 has a through hole 427 at a joint 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 2 nd axis A2 but also the component along the 3 rd axis A3. The current component along the 3 rd axis A3 applies a lorentz force in a direction intersecting the 1 st axis A1 to an arc that may be generated between the movable contact M1 and the fixed contact F1 along the 1 st axis A1, thereby promoting extinction of the arc.

As shown in fig. 12, the fixed contact member 43 includes a head portion 431 and a stem portion 432, similarly to the movable contact member 32. The fixed contact member 43 constitutes a fixed contact portion 400 together with the conductive member 42.

The head 431 has a circular truncated cone shape. The axis of the head 431 is along the 1 st axis A1. The upper surface of the head 431 functions as a fixed contact F1. The upper surface of the fixed contact member 43, which functions as the fixed contact F1, is made of, for example, a silver alloy (AgNi or agnno) ₂ ) And (4) forming. The fixed contact member 43 is formed of a copper alloy such as tough pitch copper, for example, at a portion other than the fixed contact F1. A surface (upper surface) of the fixed contact member 43 that functions as the fixed contact F1 is spherical. The surface (upper surface) of the fixed contact member 43 that functions as the fixed contact F1 may be flat or dome-shaped.

A stem 432 projects from the lower end of the head 431. The trunk 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 in a state where the trunk portion 432 passes through the through hole 426 of the holding piece 425. Thereby, the fixed contact member 43 is electrically connected to the conductive member 42.

In addition, the fixed contact F1 may be formed integrally with the conductive member 42. For example, a part of a metal plate constituting the conductive member 42 may be projected upward, and the tip of the projected portion may be used as the fixed contact F1.

As shown in fig. 2, 3, and 10A, in a state where the fixed block 4 is fixed to the main body block 10, the fixed contact F1 faces the movable contact M1 along the 1 st axis A1. The movable contact M1 is moved into and out of contact with the fixed contact F1 by the movable piece 38 of the movable spring 31 moving up and down. Further, the protruding wall portion 415 is interposed between the fixed contact F1 and the core 23 (the magnetic pole portion 231).

As shown in fig. 12, the auxiliary member 44 includes a side piece 441 and an upper piece 442. The side pieces 441 and the upper piece 442 are integrally formed of a metal material having electrical conductivity.

The side piece 441 is plate-shaped and extends along the 1 st axis A1. The side piece 441 has, on its right side face, a recess 443 recessed leftward along the 2 nd axis A2. The positioning of the auxiliary member 44 with respect to the holding base 41 is performed on the 1 st axis A1 by the recess 443.

The upper piece 442 is plate-shaped and extends rearward from the upper end of the side piece 441 along the 3 rd axis A3. A projection 444 projecting downward from the other portion of the upper piece 442 is provided on the lower surface of the upper piece 442. The protrusion 444 can be formed, for example, by pressing out a portion corresponding to the protrusion 444 from the upper side to the lower side in the upper surface of the upper sheet 442. The lower surface of the protrusion 444 faces the upper surface of the stem 322 of the movable contact point member 32.

Since the upper piece 442 of the auxiliary member 44 is located above the movable contact point member 32, even when the movable spring 31 vibrates when the movable contact point M1 is separated from the fixed contact point F1 and the movable spring 31 moves upward, excessive vibration of the movable spring 31 can be suppressed.

(2.4) Relay Main body

The relay body 1 is configured by coupling an electromagnet block 2, a movable block 3, and a fixed block 4.

For example, as shown in fig. 4, the movable block 3 is positioned to the right of the electromagnet block 2. Then, the movable block 3 is moved leftward along the 2 nd axis A2, and the two fixing projections 253 of the 1 st yoke 251 are inserted into the two fixing holes 311 of the fixing piece 36 of the movable spring 31, respectively, so that the distal ends of the fixing projections 253 are crushed. Thereby, the movable block 3 is fixed to the electromagnet block 2. This constitutes a main body block 10 (see fig. 3) in which the electromagnet block 2 and the movable block 3 are joined together.

As shown in fig. 3, the fixed block 4 is positioned to the left of the main block 10. Then, the fixed block 4 is moved rightward along the 2 nd axis A2, the projecting plate portions 624 of the upper flange portion 62 of the frame 22 are inserted into the recesses 412, 413 of the holding base 41, the holding projection 625 of the upper flange portion 62 is inserted into the holding groove 414 of the holding base 41, and the engaging projection 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 block 10 (see fig. 2). Further, the frame 22 may be further fixed to the holding base 41 by adhesion or the like.

In this way, the electromagnetic relay 100 includes the main terminal block (the bobbin 22 and the insulating member 24) including the bobbin 22 and holding the movable spring 31, and the sub terminal block (the holding block 41) holding the fixed contact F1. The sub-terminal block is fixed to the main terminal block independently of the main terminal block. In the electromagnetic relay 100 of the present embodiment, the main terminal block and the sub terminal block are independent of each other. Therefore, adjustment of the component held by one terminal block (for example, the main terminal block) (adjustment of the component position, adjustment of the spring force, and the like) can be performed separately from adjustment of the component held by the other terminal block (for example, the sub terminal block). This can simplify the manufacturing process of the electromagnetic relay 100.

In the relay body 1 of the electromagnetic relay 100 according to the present embodiment, the insulating member 7 (holding base 41) is disposed between the coil 21 and the fixed contact portion 400 (conductive member 42). Therefore, the insulation distance between the coil 21 and the conductive member (hereinafter, also referred to as "main circuit member") electrically connected to the contact device (the movable contact M1 and the fixed contact F1) can be increased. In the relay body 1 of the electromagnetic relay 100 according to the present embodiment, the main circuit components include the movable spring 31, the conductive member 42, the core 23, the armature 33, and the yoke 25. In the electromagnetic relay 100, the holding piece 425 of the conductive member 42, the fixed contact point member 43 (fixed contact point F1), and the movable piece 38 (movable contact point M1) of the movable spring 31 in the main circuit component 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.

Further, in the relay body 1 of the electromagnetic relay 100 of the present embodiment, the insulating member 24 includes the 1 st covering portion 242. Therefore, in a cross section orthogonal to the 3 rd axis A3, the shortest path between the coil 21 and the 2 nd yoke 252 is a path that bypasses the 1 st covering part 242 as indicated by a two-dot chain line L1 in fig. 10B. This can increase the insulation distance between the coil 21 and the 2 nd yoke 252, and can further increase the insulation distance between the coil 21 and the main circuit component.

Further, in the relay body 1 of the electromagnetic relay 100 of the present embodiment, the insulating member 24 includes the 2 nd covering portion 244. Therefore, in a cross section orthogonal to the 3 rd axis A3, the shortest path between the coil 21 and the armature 33 is a path bypassing the 2 nd cover part 244 as shown by a two-dot chain line L2 in fig. 10C. This can increase the insulation distance between the coil 21 and the armature 33, and can further increase the insulation distance between the coil 21 and the main circuit component. In fig. 10C, for convenience of explanation, the components are drawn so as to form a gap therebetween.

In the relay body 1 of the electromagnetic relay 100 according to the present embodiment, the 3 rd wall portion 66 of the upper flange portion 62 of the bobbin 22 is interposed between the magnetic pole portion 231 of the core 23 and the fixed contact F1 on the 2 nd axis A2. Therefore, in a cross section orthogonal to the 3 rd axis A3, the shortest path between the coil 21 and the core 23 is a path that bypasses the 3 rd wall 66 as shown by a two-dot chain line L3 in fig. 10D. This can increase the insulation distance between the coil 21 and the core 23, and can further increase the insulation distance between the coil 21 and the main circuit member. In fig. 10D, for convenience of explanation, the components are drawn so as to form a gap therebetween.

In the relay body 1 of the electromagnetic relay 100 according to the present embodiment, the protruding wall portion 415 of the holding base 41 (the insulating wall portion 70 of the insulating member 7) is interposed between the magnetic pole portion 231 of the core 23 and the fixed contact F1 on the 2 nd axis A2. Therefore, in a cross section orthogonal to the 3 rd axis A3, the shortest path between the coil 21 and the fixed contact F1 is a path that bypasses the insulating wall portion 70 as shown by a two-dot chain line L4 in fig. 10D. This can increase the insulation distance between the coil 21 and the fixed contact F1, and can further increase the insulation distance between the coil 21 and the main circuit member.

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

In the relay body 1, in a state where the coil 21 is not energized (hereinafter, also referred to as "non-energized state") without applying a voltage between the two coil terminals 26, as shown in fig. 2, the movable contact M1 is separated from the fixed contact F1 by the spring force of the movable spring 31. Accordingly, the electric circuit between the leg 421 of the conductive member 42 and the leg 35 of the movable spring 31 is cut off.

In the relay main body 1, when a voltage is applied between the two coil terminals 26 and the coil 21 is energized (hereinafter also referred to as "energized time"), the armature 33 is attracted downward toward the magnetic pole portion 231 along the 1 st axis A1 by an attraction force generated between the armature and the magnetic pole portion 231 of the core 23. Thereby, the armature 33 rotates about the hook piece 333 (counterclockwise in front view), and the lower surface of the armature 33 contacts the upper surface of the magnetic pole portion 231 of the core 23. When current is applied, the core 23, the yoke 25, and the armature 33 form a magnetic path through which magnetic flux generated by the coil 21 passes. The yoke 25 and the armature 33, which constitute a part of the magnetic circuit, are connected between both ends of the core 23 in a reverse-C shape in front view.

When current is applied, the movable contact M1 moves downward together with the armature 33 by the rotation of the armature 33. Thereby, when current is applied, movable contact M1 contacts fixed contact F1. Thus, an electrical circuit is formed between the leg 421 of the conductive member 42 and the leg 35 of the movable spring 31.

In the relay main body 1, when the energization of the coil 21 is stopped, the attraction force between the core 23 and the armature 33 disappears. Therefore, in the relay main body 1, the armature 33 rotates about the hook piece 333 as a fulcrum (clockwise in the front view) by the spring force of the movable spring 31, and the armature 33 is separated from the core 23. By the rotation of the armature 33, the movable contact M1 moves upward together with the armature 33 and is separated from the fixed contact F1. Thereby, the circuit is cut off.

In this way, in the electromagnetic relay 100 of the present embodiment, the movable spring 31 can move between the closed position and the open position in accordance with the switching of the excitation and the non-excitation of the coil 21. The closed position is a position of the movable spring 31 where the movable contact M1 contacts the fixed contact F1. The off position is a position of the movable spring 31 where the movable contact M1 is separated from the fixed contact F1.

In the relay body 1 (electromagnetic relay 100) of the present embodiment, the movable contact M1 moves along the contact/separation axis X1, and comes into contact with and separates from the fixed contact F1. The contact separation axis X1 is along the 1 st axis A1.

(2.5) case

As shown in fig. 1 and 2, the case 9 houses the relay main body 1. Therefore, the case 9 houses the coil 21, the core 23, the armature 33, the fixed contact F1, and the movable spring 31. The case 9 also houses a main terminal block (the bobbin 22 and the insulating member 24) and a sub terminal block (the holding block 41). The case 9 is, for example, a molded body of electrically insulating synthetic resin, and has insulation properties.

As shown in fig. 2 and 14, the housing 9 includes a housing main body 90. The case main body 90 constitutes an outer contour of the case 9. The case main body 90 has a rectangular box shape with an open lower surface. The case main body 90 includes an upper wall 91, a front wall 92, a rear wall 93, a right wall 94, and a left wall 95.

As shown in fig. 14, the housing 9 further includes a1 st protruding strip 961 and two 1 st connecting portions 962 inside the housing main body 90. The 1 st protruding strip 961 is plate-shaped extending along the 1 st axis A1. The 1 st projection 961 extends along the 2 nd axis A2. The 1 st protruding strip 961 faces the front wall 92 with a gap on the 3 rd axis A3. Two 1 st connecting portions 962 connect both end portions of the 1 st protruding strip portion 961 on the 2 nd axis A2 and the rear surface of the front wall 92, respectively. The front wall 92 of the case main body 90, the 1 st protruding strip 961, and the two 1 st connecting portions 962 form the 1 st recess 96 having an open lower surface.

The housing 9 further includes a2 nd protrusion 971 and two 2 nd connecting portions 972 (see fig. 15) on the inner side of the housing main body 90. The 2 nd protrusion 971 is plate-shaped and extends along the 1 st axis A1. The 2 nd protrusion 971 extends along the 2 nd axis A2. The 2 nd protruding portion 971 faces the rear wall 93 with a gap on the 3 rd axis A3. Two 2 nd connecting portions 972 connect both end portions of the 2 nd projection portion 971 on the 2 nd axis A2 with the front surface of the rear wall 93, respectively. The rear wall 93 of the housing main body 90, the 2 nd protrusion 971, and the two 2 nd coupling portions 972 form a2 nd recess 97 whose lower surface is open.

As shown in fig. 15, the 1 st wall portion 64 (more specifically, the rib 642) of the upper flange portion 62 of the framework 22 is inserted into the 1 st recess 96. Therefore, the 1 st protruding strip 961 faces the 1 st wall portion 64 (more specifically, the rib 642) on the 3 rd axis A3. Further, the 1 st connecting part 962 is inserted into the 1 st recess 643. The two 1 st connecting portions 962 are inserted into the two 1 st recesses 643, respectively. The 1 st wall portion 64 (more specifically, the rib 642) is surrounded by the 1 st ridge portion 961, the two 1 st connecting portions 962, and the front wall 92 in four directions, i.e., front, rear, left, and right directions.

As shown in fig. 15, the 2 nd wall portion 65 (more specifically, the rib 652) of the upper flange portion 62 of the frame 22 is inserted into the 2 nd recess 97. Therefore, the 2 nd protrusion 971 faces the 2 nd wall 65 (more specifically, the rib 652) on the 3 rd axis A3. In addition, the 2 nd connecting portion 972 is inserted into the 2 nd recessed portion 653. The two 2 nd connecting portions 972 are inserted into the two 2 nd recessed portions 653, respectively. The 2 nd wall portion 65 (more specifically, the rib 652) is surrounded by the 2 nd ridge portion 971, the two 2 nd connecting portions 972, and the rear wall 93 in four directions, i.e., front, rear, left, and right.

Fig. 16A shows a cross-sectional view of the electromagnetic relay 100 at an imaginary plane orthogonal to the 2 nd axis A2. In the electromagnetic relay 100 of the present embodiment, the upper flange portion 62 is interposed between the armature 33 and the coil 21 on the 1 st axis A1. Therefore, in a cross section orthogonal to the 2 nd axis A2, the shortest path between the armature 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 the 1 st wall portion 64 and the 2 nd wall portion 65, and the 1 st wall portion 64 and the 2 nd wall portion 65 are inserted into the 1 st recess 96 and the 2 nd recess 97 of the case 9, respectively. Therefore, in a cross section orthogonal to the 2 nd axis A2, the shortest path between the armature 33 and the coil 21 is, for example, an S-shaped path including a space S1 between the 1 st protruding strip portion 961 and the 1 st wall portion 64 (rib 642) of the housing 9 as shown by a two-dot chain line L5 in fig. 16B. Thus, in the electromagnetic relay 100 of the present embodiment, the insulation distance between the coil 21 and the armature 33 can be increased, and the insulation distance between the coil 21 and the main circuit component can be further increased. In fig. 16B, for convenience of explanation, the components are drawn so as to form a gap therebetween.

In the electromagnetic relay 100 of the present embodiment, as shown in fig. 16A, the lower ends of the 1 st protruding strip 961 and the 2 nd protruding strip 971 of the housing 9 are positioned below the upper surface of the core 23 (the upper surface of the magnetic pole portion 231) on the 1 st axis A1. The upper end of the 1 st wall portion 64 (the upper end of the rib 642) and the upper end of the 2 nd wall portion 65 (the upper end of the rib 652) of the frame 22 are positioned above the upper surface of the core 23. The armature 33 moves up and down along the 1 st axis A1, but cannot move to a position lower than the upper surface of the core 23, and therefore the armature 33 is always positioned above the upper surface of the core 23. Since the lower end of the 1 st protruding portion 961 (the lower end of the 2 nd protruding portion 971) is positioned below the upper surface of the core 23, the shortest path between the armature 33 and the coil 21 (see the two-dot chain line L5) is a path that bypasses the 1 st protruding portion 961 (the 2 nd protruding portion 971). Thus, in the electromagnetic relay 100 of the present embodiment, the insulation distance between the coil 21 and the armature 33 can be increased and the insulation distance between the coil 21 and the main circuit component can be increased, as compared with the electromagnetic relay of the comparative example in which the lower end of the 1 st protrusion (the 2 nd protrusion) is located above the upper surface of the core.

In the electromagnetic relay 100 of the present embodiment, as shown in fig. 16A, the lower end of the 1 st protruding portion 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 1 st wall portion 64) on the 1 st axis A1. The upper end of the 1 st wall portion 64 of the upper flange portion 62 of the frame 22 is separated from the case 9 on the 1 st axis A1. Further, the lower end of the 2 nd protruding portion 971 of the case 9 contacts the upper surface of the upper flange portion 62 of the frame 22 (the upper surface of the base portion 651 of the 2 nd wall portion 65) on the 1 st axis A1. The upper end of the 2 nd wall portion 65 of the upper flange portion 62 of the frame 22 is separated from the case 9 on the 1 st axis A1. In the electromagnetic relay 100, the lower ends of the 1 st protruding strip 961 and the 2 nd protruding strip 971 are in contact with the upper surface of the upper flange 62, whereby the insulation distance between the coil 21 and the armature 33 can be increased, and the insulation distance between the coil 21 and the main circuit member can be increased.

In the electromagnetic relay 100 of the present embodiment, as shown in fig. 15, the 1 st protruding strip 961 and the 2 nd protruding strip 971 are provided at least at positions overlapping with an imaginary line extending from the center of the core 23 along the 3 rd axis A3. The center of the core 23 substantially coincides with the center of the coil 21. Therefore, the 1 st protruding strip 961 and the 2 nd protruding strip 971 are provided at least at positions overlapping with an imaginary line extending from the center of the coil 21 along the 3 rd axis A3 in a plan view. The 1 st recess 643 and the 2 nd recess 653 are not provided at positions overlapping the imaginary line. Therefore, the shortest path between the armature 33 and the coil 21 is a path that bypasses the 1 st projection 961 and the rib 642 or bypasses the 2 nd projection 971 and the rib 652. This can increase the insulation distance between the coil 21 and the armature 33, and can further increase the insulation distance between the coil 21 and the main circuit component.

In the electromagnetic relay 100 according to the present embodiment, the rib 642 (or the 1 st recess 643) of the 1 st wall portion 64 and the 1 st connecting portion 962 of the case 9 also serve to position the case 9 with respect to the relay main body 1. Similarly, the rib 652 (or the 2 nd recessed portion 653) of the 2 nd wall portion 65 and the 2 nd connecting portion 972 of the housing 9 also serve to position the housing 9 with respect to the relay main body 1. That is, the positioning member also has a function of increasing the insulation distance. This makes it possible to increase the insulating performance while reducing the number of components.

In the electromagnetic relay 100 according to the present embodiment, the 1 st projection portion 961 and the 2 nd projection portion 971 are adjacent to the front side surface and the rear side surface of the armature 33, respectively, and therefore, it is possible to suppress a situation in which the armature 33 excessively moves due to an impact from the outside. This can suppress deformation of the movable spring 31 fixed to the armature 33. That is, the positioning member has a function of improving the impact resistance. This makes it possible to improve impact resistance while reducing the number of components.

As described above, the electromagnetic relay 100 of the present embodiment can increase the insulation distance between the main circuit member and the coil 21 as compared with the conventional electromagnetic relay. Conversely, the electromagnetic relay 100 can be miniaturized while maintaining the insulation performance equivalent to that of the conventional electromagnetic relay. Alternatively, the size of the coil 21 can be increased while maintaining the same insulation performance as in the conventional art, thereby reducing the power consumption of the coil 21.

(3) Modification example

The above-described embodiment is only one of various embodiments of the present disclosure. The above embodiment can be variously modified according to design and the like as long as the purpose of cost disclosure can be achieved. Modifications of the embodiment are described below. Hereinafter, the above-described embodiment may be referred to as a "basic example". The above-described basic example and the modifications described below can be applied in appropriate combinations.

(3.1) variation 1

An electromagnetic relay 100A according to this modification will be described with reference to fig. 17 and 18. The same structure as that of the electromagnetic relay 100 of the basic example may be appropriately omitted from the description.

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 in the center of the upper flange portion 62 on the 3 rd axis A3. In contrast, in the electromagnetic relay 100A of the present modification example, as shown in fig. 17, the hole 622A of the upper flange portion 62A of the bobbin 22A is formed on the 3 rd axis A3 at a position relatively on the rear side with respect to the center of the upper flange portion 62A. Therefore, in the electromagnetic relay 100A of the present modification example, the core 23A and the coil 21 are also formed on the 3 rd axis A3 at positions relatively closer to the rear side than the center of the flange portion 62A.

In the electromagnetic relay 100A of the present modification example, as shown in fig. 17, the 1 st wall portion 64A and the 2 nd wall portion 65A are asymmetrical in a plan view. That is, rib 652A of second wall portion 65A relatively close to the center of hole 622A (the center of coil 21) is longer in length (dimension along second axis A2) than rib 642A of first wall portion 64A relatively far from the center of hole 622A (the center of coil 21). Thereby, the insulation distance between the armature 33 and the coil 21 is relatively increased by the 2 nd wall portion 65A on the rear side where the insulation distance between the core 23A and the coil 21 is relatively short.

As shown in fig. 18, in an electromagnetic relay 100A according to the present modification example, the 1 st recess 96A and the 2 nd recess 97A are asymmetrical in a plan view. That is, the length (dimension along the 2 nd axis A2) of the 1 st protruding strip portion 961A and the position along the 2 nd axis A2 of the 1 st connecting portion 962A are determined such that the rib 642A of the 1 st wall portion 64A fits in the 1 st recess 96A. The length (dimension along the 2 nd axis A2) of the 2 nd protrusion 971A and the position along the 2 nd axis A2 of the 2 nd connecting portion 972A are determined so that the rib 652A of the 2 nd wall portion 65A fits in the 2 nd recess 97A.

In the electromagnetic relay 100A of the present modification, the insulation distance between the coil 21 and the armature 33 can be increased.

(3.2) other modifications

In a modification, the method of fixing the sub-terminal block to the main terminal block is not limited to press fitting. For example, the fixing may be performed by adhesion, resin welding, or the like.

In a modification, the 1 st cover part 242 may cover the 2 nd yoke 252 from the 3 directions, and may cover the 2 nd yoke 252 from above, for example, by including only the upper cover part 291.

In a modification, the 1 st covering portion 242 may further include a lower covering portion that covers the 2 nd yoke 252 from below.

In a modification, a liquid sealing material (e.g., epoxy resin) may be flowed to the lower surface side of the lower flange portion 63, and the lower flange portion 63 and the yoke 25 (the 2 nd yoke 252) may be bonded by the solidified sealing material. Since the lower flange portion 63 has the lower wall portion 632 that has higher wettability with respect to the sealing material than the 2 nd yoke 252, sealing by the sealing material is facilitated. Further, since the lower surfaces of the 2 nd yoke 252 and the core 23 (the small diameter portion 232) are exposed from the hole 637 of the lower wall portion 632 of the lower flange portion 63, sealing by a sealing material becomes easier. At this time, the lower flange portion 63 of the bobbin 22 and the insulating member 24 are also bonded by the sealing material.

In a modification, the thickness (dimension along the 3 rd axis A3) of the base 641 and the rib 642 may be the same in the 1 st wall portion 64. The same applies to the 2 nd wall portion 65.

In a modification, the 1 st recess 643 may not be provided at both ends of the 1 st wall portion 64 on the 2 nd axis A2. For example, the 1 st recess 643 may be provided only at one end of the 2 nd axis A2 of the 1 st wall portion 64, or may be provided at the center. The 1 st connecting portion 962 of the case 9 may be provided at a position corresponding to the 1 st recess 643. In one example, when the rib 642 is formed over the entire length of the 2 nd axis A2 of the base 641 and the 1 st recessed portion 643 is provided at the center of the 2 nd axis A2 of the rib 642, the 1 st protruding strip portion 961 and the 1 st connecting portion 962 of the housing 9 may be formed in a T-shape in a plan view. The same applies to the 2 nd recessed portion 653 of the 2 nd wall portion 65 and the 2 nd connecting portion 972 of the housing 9.

In a modification, the lower ends of the 1 st protruding portion 961 may not contact the upper flange portion 62 (the upper surface of the base portion 641 of the 1 st wall portion 64). In a modification, the upper end of the rib 642 of the 1 st wall portion 64 may contact the bottom of the 1 st recess 96 of the housing 9.

In a modification, the lower ends of the 2 nd protrusions 971 may not contact the upper flange portion 62 (the upper surface of the base portion 651 of the 2 nd wall portion 65). In a modification, the upper end of the rib 652 of the 2 nd wall 65 may contact the bottom of the 2 nd recess 97 of the housing 9.

In a modification, the movable contact M1 and the fixed contact F1 may be provided below the bobbin 22. In this case, for example, the 2 nd yoke 252 may be disposed above the frame 22, the 1 st protruding portion 961 and the 1 st wall portion 64 may be provided so as to cover the front side surface of the 2 nd yoke 252, and the 2 nd protruding portion 971 and the 2 nd wall portion 65 may be provided so as to cover the rear side surface of the 2 nd yoke 252.

In a modification, the insulating member 24 may not include the No. 2 covering portion 244. In this case, the height (dimension along the 1 st axis A1) of the insulating member 24 can be suppressed. In this case as well, since the insulating member 24 includes the 1 st covering portion 242, the insulating member 24 can be firmly fixed to the frame 22.

In a modification, the height (dimension along the 1 st axis A1) of the rib 642 of the 1 st wall portion 64, the height of the rib 652 of the 2 nd wall portion 65, the height of the 1 st protruding portion 961, and the height of the 2 nd protruding portion 971 may be adjusted in accordance with a required insulation distance.

In the above-described basic example, the contact device is a so-called a-contact (normally open contact) that cuts off the circuit when no current is applied, but is not limited thereto. In a modification, the contact device may be a so-called b-contact (normally closed contact) that forms a circuit when not energized. In a modification, the contact device may be a so-called c-contact having two fixed contacts F1 and having a movable contact M1 that contacts different fixed contacts F1 at the time of energization and at the time of non-energization. When the contact device is a b-contact or a c-contact, the lower surface of the projection 444 of the auxiliary member 44 may be used as the fixed contact F1.

(4) Means for

The following embodiments are clearly disclosed in the present specification based on the embodiments and the modifications described above.

The electromagnetic relay 100 (100A) according to embodiment 1 includes: a coil 21; a bobbin 22 around which the coil 21 is wound; a core 23 extending vertically and penetrating the frame 22; a fixed contact part 400 having a fixed contact F1; a movable spring 31 having a movable contact M1 opposed to the fixed contact F1, and moving between a closed position where the movable contact M1 is in contact with the fixed contact F1 and an open position where the movable contact M1 is separated from the fixed contact F1 in accordance with switching of excitation and non-excitation of the coil 21; and a case 9 that houses the coil 21, the bobbin 22, the fixed contact F1, and the movable contact M1 therein, and at least a part of main circuit components electrically connected to the fixed contact portion 400 and the movable spring 31 is disposed above the bobbin, the bobbin 22 including: a main body portion 61 around which the coil 21 is wound; and an upper flange portion 62 provided on an upper portion of the body portion 61, the upper flange portion 62 including: a1 st wall portion 64 extending upward; and a2 nd wall part 65 extending upward and opposed to the 1 st wall part 64, the 1 st wall part 64 having a1 st recess 643, the 2 nd wall part 65 having a2 nd recess 653, the housing 9 having: a case main body 90 that constitutes an outer contour of the case 9; a1 st projection 961 provided inside the case main body 90 and at least partially facing the 1 st wall portion 64; a1 st connecting portion 962 connected to the 1 st protruding strip portion 961 and inserted at least partially into the 1 st recessed portion 643; a2 nd protrusion 971 provided inside the case main body 90 and at least partially facing the 2 nd wall 65; and a2 nd connecting portion 972 provided inside the case main body 90, connected to the 2 nd ridge portion 971, and at least partially inserted into the 2 nd recessed portion 653.

Examples of the main circuit component disposed above the bobbin 22 include a holding piece 425 of the conductive member 42, a fixed contact member 43, and a movable piece 38 of the movable spring 31 (see fig. 11 or 12).

According to this embodiment, the insulation distance between the fixed contact portion 400 and the movable spring 31 and the coil 21 can be increased by the 1 st protruding portion 961, the 1 st wall portion 64, the 2 nd protruding portion 971, and the 2 nd wall portion 65. This can increase the insulation distance between the coil 21 and the main circuit member (the conductive member electrically connected to the contact device including the fixed contact F1 and the movable contact M1). Further, the positioning of the case 9 with respect to the frame 22 can be performed by the 1 st recessed portion 643 of the 1 st wall portion 64 and the 1 st connecting portion 962 of the case 9 and/or the 2 nd recessed portion 653 of the 2 nd wall portion 65 and the 2 nd connecting portion 972 of the case 9. Further, excessive movement of the armature 33 due to an external impact can be suppressed, and deformation of the movable spring 31 fixed to the armature 33 can be suppressed.

The electromagnetic relay 100 (100A) according to claim 2 further includes an insulating member 7 (holding base 41) disposed between the fixed contact portion 400 and the coil 21.

According to this aspect, the insulation distance between the coil 21 and the main circuit member can be increased.

In the electromagnetic relay 100 (100A) according to embodiment 3, the insulating member 7 (holding base 41) has an insulating wall portion 70 (protruding wall portion 415) extending vertically.

According to this aspect, the insulation distance between the coil 21 and the main circuit member can be increased.

In the electromagnetic relay 100 (100A) according to embodiment 4, the insulating wall 70 (protruding wall 415) is positioned between the fixed contact F1 and the coil 21.

According to this aspect, the insulation distance between the coil 21 and the main circuit member can be increased.

In the electromagnetic relay 100 (100A) according to the 5 th aspect, the 1 st wall portion 64 has two 1 st recesses 643 as the 1 st recesses 643 located at both ends of the 1 st wall portion 64, and the 2 nd wall portion 65 has two 2 nd recesses 653 as the 2 nd recesses 653 located at both ends of the 2 nd wall portion 65.

According to this aspect, the insulation distance between the coil 21 and the main circuit member can be increased.

In the electromagnetic relay 100 (100A) according to the 6 th aspect, the case 9 includes two 1 st connection portions 962 inserted into the two 1 st recess portions 643 as the 1 st connection portions 962, and has two 2 nd connection portions 972 inserted into the two 2 nd recess portions 653 as the 2 nd connection portions 972, the 1 st recess 96 into which the 1 st wall portion 64 is inserted is formed by the case main body 90, the two 1 st connection portions 962, and the 1 st protruding strip portion 961, and the 2 nd recess 97 into which the 2 nd wall portion 65 is inserted is formed by the case main body 90, the two 2 nd connection portions 972, and the 2 nd protruding strip portion 971.

According to this aspect, the insulation distance between the coil 21 and the main circuit member can be increased.

In the electromagnetic relay 100A according to embodiment 7, the 1 st wall portion 64 and the 2 nd wall portion 65 are asymmetrical in a plan view.

According to this aspect, the insulation distance between the coil 21 and the main circuit member can be increased in accordance with the positional relationship between the coil 21 and the main circuit member.

In the electromagnetic relay 100 (100A) according to embodiment 8, the bobbin 22 further includes the 3 rd wall portion 66 extending upward from the upper flange portion 62 and located between the 1 st wall portion 64 and the 2 nd wall portion 65.

According to this aspect, the insulation distance between the coil 21 and the main circuit member can be increased.

In the electromagnetic relay 100 (100A) according to embodiment 9, the fixed contact F1 and the movable contact M1 are provided above the bobbin 22.

According to this embodiment, the insulation distance between the coil 21 and the fixed contact F1 and the movable contact M1 can be increased.

In the electromagnetic relay 100 (100A) according to the 10 th aspect, the lower end of the 1 st protruding portion 961 of the housing 9 is located below the upper surface of the core 23, and the upper end of the 1 st wall portion 64 of the bobbin 22 is located above the upper surface of the core 23.

According to this aspect, the insulation distance between the coil 21 and the main circuit member can be increased.

In the electromagnetic relay 100 (100A) according to the 11 th aspect, the lower ends of the 1 st protruding strip 961 contact the upper surface of the upper flange portion 62 of the bobbin 22. The upper end of the 1 st wall part 64 is separated from the housing (9).

According to this aspect, the insulation distance between the coil 21 and the main circuit member can be increased.

Claims (11)

1. An electromagnetic relay, wherein,

the electromagnetic relay includes:

a coil;

a bobbin around which the coil is wound;

a core extending vertically and penetrating the frame;

a fixed contact part having a fixed contact;

a movable spring having a movable contact point opposed to the fixed contact point, moving between a closed position where the movable contact point is in contact with the fixed contact point and an open position where the movable contact point is separated from the fixed contact point, in accordance with switching of excitation and non-excitation of the coil; and

a case that houses the coil, the bobbin, the fixed contact, and the movable contact inside,

at least a part of the main circuit member electrically connected to the fixed contact portion and the movable spring is disposed above the bobbin,

the skeleton has:

a main body portion around which the coil is wound; and

an upper flange part provided at an upper part of the main body part,

the upper flange portion has:

a1 st wall portion extending upward; and

a2 nd wall part extending upward and opposed to the 1 st wall part,

said 1 st wall portion having a1 st recess,

said 2 nd wall portion having a2 nd recess,

the housing has:

a case main body constituting an outline of the case;

a1 st protruding strip part which is arranged on the inner side of the shell main body and at least partially opposite to the 1 st wall part;

a1 st connecting portion connected to the 1 st protruding portion and at least partially inserted into the 1 st recess;

a2 nd protruding strip portion provided on the inner side of the case main body and at least partially facing the 2 nd wall portion; and

and a2 nd connecting portion provided inside the case main body, connected to the 2 nd protruding portion, and at least partially inserted into the 2 nd recessed portion.

2. The electromagnetic relay of claim 1,

the electromagnetic relay further includes an insulating member disposed between the fixed contact portion and the coil.

3. The electromagnetic relay of claim 2,

the insulating member has an insulating wall portion extending along the upper and lower sides.

4. The electromagnetic relay of claim 3,

the insulating wall portion is located between the fixed contact and the coil.

5. The electromagnetic relay according to any one of claims 1 to 4, wherein,

the 1 st wall portion has two 1 st recesses as the 1 st recesses at both ends of the 1 st wall portion,

the 2 nd wall portion has two 2 nd recesses as the 2 nd recess at both ends of the 2 nd wall portion.

6. The electromagnetic relay of claim 5 wherein,

the housing has two 1 st connection portions inserted into the two 1 st recessed portions respectively as the 1 st connection portions, and has two 2 nd connection portions inserted into the two 2 nd recessed portions respectively as the 2 nd connection portions,

a1 st recess into which the 1 st wall portion is inserted is formed by the case main body, the two 1 st connecting portions, and the 1 st ridge portion,

a2 nd recess into which the 2 nd wall portion is inserted is formed by the case main body, the two 2 nd connecting portions, and the 2 nd ridge portion.

7. An electromagnetic relay according to any one of claims 1 to 6,

the 1 st wall portion and the 2 nd wall portion are asymmetrical in a plan view.

8. The electromagnetic relay according to any one of claims 1 to 7,

the framework also has a3 rd wall portion extending upward and located between the 1 st wall portion and the 2 nd wall portion.

9. The electromagnetic relay according to any one of claims 1 to 8, wherein,

the fixed contact and the movable contact are arranged above the framework.

10. The electromagnetic relay according to any one of claims 1 to 9,

the lower end of the 1 st protruding strip of the shell is positioned at a position lower than the upper surface of the iron core,

an upper end of the 1 st wall portion of the frame is located above an upper surface of the core.

11. An electromagnetic relay according to any one of claims 1 to 10,

the lower ends of the 1 st protruding strip portions are in contact with the upper surface of the upper flange portion of the framework,

the upper end of the 1 st wall part is separated from the housing.

Images