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 broadly to electromagnetic relays, and more particularly to electromagnetic relays comprising a contact arrangement comprising a fixed contact and a movable contact and an electromagnet arrangement comprising a coil.

Background technique

Patent Document 1 discloses an electromagnetic relay. The electromagnetic relay is composed of an electromagnetic relay body and a cover covering the electromagnetic relay body. The electromagnetic relay main body is composed of the following members: an electromagnetic block including a movable contact spring having a coil and swinging under the action of current flowing to the coil; two fixed contact terminals which respectively There are fixed contacts; a retreat stopper, which has two movable contact abutments; and a base block, which holds the electromagnetic block, the fixed contact terminal, and the retreat stopper.

The yoke of the electromagnetic block is formed in a substantially L-shape, and is formed so that 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 belt plate member that can be bent elastically and formed into a substantially L-shape, and a plate-shaped armature attracted by magnetic force is fixed inside the midway area of one side. .

prior art literature

patent documents

Patent Document 1: Japanese Patent Laid-Open No. 2009-289678

Contents of the invention

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

In the present disclosure, terms indicating directions such as "upper", "lower", "left", "right", "front", and "rear" are sometimes used for description. These directions only represent relative positional relationships, and do not limit the present disclosure thereby. For example, when the electromagnetic relay 100 of the present disclosure is installed to be rotated, the direction of the electromagnetic relay 100 in an actually used state may differ from the direction of the electromagnetic relay 100 described in the present disclosure.

An electromagnetic relay according to a technical solution of the present disclosure includes: a coil; a skeleton for winding the coil; an iron core extending up and down and penetrating through the skeleton; a fixed contact part having a fixed contact; a spring having a movable contact opposite to the fixed contact, and corresponding to switching between excitation and de-excitation of the coil, the movable contact is in contact with the fixed contact at the closed position and the moving between an open position where the movable contact is separated from the fixed contact; At least a part of the main circuit part electrically connected to the fixed contact part and the movable spring is arranged above the skeleton, and the skeleton has: a main body part on which the coil is wound; and an upper flange part , which is provided on the upper part of the main body part, the upper flange part has: a first wall part, which extends upward; and a second wall part, which extends upward and is opposite to the first wall part, The first wall part has a first concave part, the second wall part has a second concave part, and the casing has: a casing main body, which constitutes the outer contour of the casing; a first protruding part, which is arranged on The inner side of the case main body is at least partially opposed to the first wall portion; the first connecting portion is connected to the first protruding portion and is at least partially inserted into the first recess; the second protruding portion, It is provided on the inner side of the case main body, at least partly opposed to the second wall part; and a second connecting part, which is provided on the inner side of the said case main body, is connected to the second protruding part and is inserted at least partly to the second recess.

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

Description of drawings

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

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

FIG. 3 is an exploded perspective view of a relay body included in the above-mentioned electromagnetic relay.

Fig. 4 is an exploded perspective view of a main body block included in the above-mentioned relay main body.

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

Fig. 6 is a plan view of a skeleton included in the above-mentioned electromagnet block.

Fig. 7 is a perspective view of the skeleton described above.

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

Fig. 9 is a cross-sectional view of the above-mentioned electromagnet block.

Fig. 10A is a cross-sectional view of the above-mentioned relay body.

Fig. 10B is an enlarged view of part B1 of Fig. 10A.

FIG. 10C is an enlarged view of part B2 of FIG. 10A .

Fig. 10D is an enlarged view of part B3 of Fig. 10A.

Fig. 11 is an exploded perspective view of a movable block included in the above-mentioned main body block.

Fig. 12 is an exploded perspective view of a fixing block included in the above-mentioned relay body.

Fig. 13 is a perspective view of a holding stand included in the above-mentioned fixed block.

Fig. 14 is a perspective view of a case included in the above-mentioned electromagnetic relay.

Fig. 15 is a sectional view of the above-mentioned electromagnetic relay.

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

Fig. 16B is an enlarged view of part B4 of Fig. 16A.

FIG. 17 is a plan view of a frame included in the electromagnetic relay of Modification 1. FIG.

Fig. 18 is a sectional view of the above-mentioned electromagnetic relay.

Explanation of reference signs

100, 100A, electromagnetic relay; 21, coil; 22, 22A, skeleton; 23, 23A, core; 24, insulating member; 241, main body; 25, yoke; 251, first yoke; 252, second yoke Iron; 31, movable spring; 400, fixed contact part; 61, main body part; 62, 62A, upper flange part; 64, 64A, first wall part; 643, first concave part; 65, 65A, second Wall; 653, second recess; 66, third wall; 7, insulating member; 70, insulating wall; 9, housing; 961, 961A, first protrusion; 962, 962A, first connection ; 971, 971A, 2nd protrusion; 972, 972A, 2nd connection; F1, fixed contact; M1, movable contact; A1, 1st axis; A2, 2nd axis; A3, 3rd axis .

Detailed ways

An electromagnetic relay according to an embodiment of the present disclosure will be described using the drawings. The drawings described in the following embodiments are schematic diagrams, and the respective ratios of the sizes and thicknesses of the constituent elements in the drawings are not limited to reflect actual dimensional ratios.

(1) Summary

As shown in FIGS. 2 to 6 , 10A to 10D , and 15 , the electromagnetic relay 100 of this 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 skeleton 22 . The iron core 23 vertically penetrates the frame 22 along the first axis A1. The fixed contact part 400 has a fixed contact F1. The movable spring 31 has a movable contact M1 facing the fixed contact F1 along the first axis A1. The movable spring 31 moves between the closed position in which the movable contact M1 is in contact with the fixed contact F1 and the open position in which the movable contact M1 is separated from the fixed contact F1 corresponding to the switching of the excitation and non-excitation of the coil 21 . The case 9 accommodates the coil 21, the bobbin 22, the fixed contact F1, and the movable contact M1 inside. At least a part of the main circuit components electrically connected to the fixed contact portion 400 and the movable spring 31 is disposed above the frame 22 . The bobbin 22 includes: a main body portion 61 around which the coil 21 is wound; and an upper flange portion 62 provided on an upper portion of the main body portion 61 . The upper flange portion 62 includes: a first wall portion 64 provided on a first side along a second axis A2 intersecting with the first axis A1; and a second wall portion 65 provided on a side along the second axis A2. The second side faces the first wall portion 64 on the third axis A3 intersecting the first axis A1 and the second axis A2. The first wall portion 64 has a first recessed portion 643 recessed along the first axis A1. The second wall portion 65 has a second recessed portion 653 recessed along the first axis A1. The case 9 includes a case main body 90 constituting the outer shape of the case 9 . The housing 9 includes: a first protruding portion 961, which is at least partially opposed to the first wall portion 64 on the third axis A3; and a first connecting portion 962, which is connected to the first protruding portion 961 and at least partially inserted into the The first concave portion 643 . The casing 9 includes: a second protruding portion 971, which is at least partially opposed to the second wall portion 65 on the third axis A3; and a second connecting portion 972, which is connected to the second protruding portion 971 and at least partially inserted into the The second concave portion 653 .

In the electromagnetic relay 100 of this embodiment, the first connecting portion 962 of the case 9 is inserted into the first recess 643 of the first wall portion 64 of the upper flange portion 62 of the frame 22, and the first protrusion portion of the case 9 961 faces the first wall portion 64 . In addition, in the electromagnetic relay 100, the second connection portion 972 of the housing 9 is inserted into the second recess 653 of the second wall portion 65 of the upper flange portion 62 of the frame 22, and the second protrusion 971 of the housing 9 is connected to the second wall portion 65 of the frame 22. The second wall portion 65 faces. Therefore, by using the first protrusion 961 and the first wall 64 (or, the second protrusion 971 and the second wall 65), it is possible to achieve the contact between the fixed contact 400 and the movable spring 31 and the coil 21. Increased insulation distance. Accordingly, in the electromagnetic relay 100 of the present embodiment, the insulation distance between the conductive member electrically connected to the contact device including the movable contact M1 and the fixed contact F1 and the coil 21 can be increased.

In addition, in the electromagnetic relay 100 of this embodiment, the first connecting portion 962 between the first recess 643 of the first wall portion 64 and the case 9 and/or the connection between the second recess 653 of the second wall 65 and the case 9 is used. The second connecting portion 972 can be used to position the housing 9 relative to the frame 22 .

Furthermore, in the electromagnetic relay 100 of this 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

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

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 is electrically insulated from the conductive member electrically connected to the coil 21 .

Electromagnetic relay 100 is mounted, for example, in an electric vehicle. Electromagnetic relay 100 is used, for example, to switch on and off a circuit of a charging line of an electric vehicle. The contact device is inserted into the circuit of the charging line.

As shown in FIGS. 1 and 2 , the electromagnetic relay 100 includes a relay body 1 and a housing 9 .

As shown in FIGS. 2 to 4 , the relay main body 1 is constituted 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 formed by combining these blocks. Hereinafter, a block formed by joining the movable block 3 to the electromagnet block 2 may be referred to as a main body block 10 (see FIG. 3 ).

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

Hereinafter, the imaginary axis along which the core 23 extends is also referred to as a first axis A1. The armature 33 is aligned with the core 23 along the first axis A1. In addition, the imaginary axis along which the main body block 10 and the fixed block 4 are arranged is also called 2nd axis A2. The second axis A2 intersects the first axis A1 and is orthogonal here. In addition, the imaginary axis which intersects both the 1st axis A1 and the 2nd axis A2 is also called 3rd axis A3. Here, the third axis A3 is perpendicular to both the first axis A1 and the second axis A2. In addition, the side where the armature 33 is located when viewed from the core 23 on the first axis A1 is also referred to as "upper", and the side where the iron core 23 is located when viewed from the armature 33 on the first axis A1 is also referred to as "upper". "Down". In addition, the side where the fixed block 4 is located when viewed from the main body block 10 on the second axis A2 is also referred to as "left", and the side where the main body block 10 is located when viewed from the fixed block 4 on the second axis A2 is also referred to as "left". Side is also referred to as "right". In addition, both sides on the third axis A3 are also referred to as "front" and "rear", respectively.

In addition, in the present disclosure, "top view" refers to observation from above along the first axis A1, "side view" refers to observation from the right or left along the second axis A2, and "front view" refers to viewing along the second axis A2. The third axis A3 is viewed from the front.

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

(2.1) Electromagnet block

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

As shown in FIG. 5 , the frame 22 has a main body portion 61 , an upper flange portion 62 provided on the upper portion of the main body portion 61 , and a lower flange portion 63 provided on the lower portion of the main body portion 61 . The main body portion 61 , the upper flange portion 62 , and the lower flange portion 63 are integrally formed as a molded body of synthetic resin having electrical insulation properties.

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

As shown in FIGS. 5 and 6 , the upper flange portion 62 includes a substantially rectangular plate-shaped upper flange main body 621 in plan view. The upper flange main body 621 has a circular hole 622 connected to the inner space of the main body part 61 on the left side of the center. On the upper surface of the upper flange main body 621 , an annular support stand portion 623 protruding upward is provided around the hole 622 .

The upper flange portion 62 has a first wall portion 64 , a second wall portion 65 , and a third wall portion 66 on the upper surface of the upper flange body 621 .

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

The first wall portion 64 includes a base portion 641 formed on the upper surface of the upper flange body 621 and a rib 642 formed on the upper surface of the base portion 641 . The base portion 641 is substantially rectangular parallelepiped extending along the second axis A2. The protruding rib 642 has a substantially protruding shape extending along the second axis A2.

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

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

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

The second wall portion 65 faces the first wall portion 64 on the third axis A3 via the hole 622 . The first wall portion 64 is symmetrical to the second wall portion 65 in plan view.

The second wall portion 65 includes a base portion 651 formed on the upper surface of the upper flange body 621 and a rib 652 formed on the upper surface of the base portion 651 . The base portion 651 is substantially rectangular parallelepiped extending along the second axis A2. The protruding rib 652 has a substantially protruding shape extending along the second axis A2.

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

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

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

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

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

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

The protruding plate portion 624 is a plate shape protruding leftward along the second axis A2 from the third side (left panel) of the upper flange main body 621 . The protruding plate portion 624 is in the same plane as the upper flange main body 621 .

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

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

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

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

The lower wall portion 632 has a substantially rectangular plate shape in plan view. The lower wall portion 632 has a circular hole 637 connecting the inner space and the outer space of the lower flange portion 63 at its center. 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 in length (dimension along the second axis A2 ) than the upper wall portion 631 . The right end of the lower wall portion 632 protrudes to the right side relative to the right end of the upper wall portion 631 in plan view.

On the lower surface of the lower wall portion 632, an engaging protrusion 638 protruding downward is provided at the left end at the center of the third axis A3.

The front wall portion 633 and the rear wall portion 634 have a substantially rectangular plate shape in a front view. The front wall portion 633 connects 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 the rear edge of the upper wall portion 631 and the rear edge of the lower wall portion 632 .

The left wall portion 635 has a substantially rectangular plate shape in a side view. The left wall portion 635 connects 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 at both end portions (front end portion and rear end portion) of the third axis A3 at the left end, respectively. The holding groove 639 is formed straddling the upper wall portion 631 , the left wall portion 635 , and the lower wall portion 632 .

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

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

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

As shown in FIGS. 4 and 5 , the coil 21 is wound around the skeleton 22 . The coil 21 is wound around the main body portion 61 of the skeleton 22 . Therefore, the coil 21 is wound around the core 23 .

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

As shown in FIG. 5 , the yoke 25 includes a first yoke 251 and a second yoke 252 .

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

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

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

As shown in FIGS. 4 and 5 , the first yoke 251 is arranged on the right side of the coil 21 . The second yoke 252 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. Then, the iron core 23 (more specifically, the small-diameter portion 232 ) is inserted into the through-hole 254 of the second yoke 252 from above (see FIGS. 9 and 10A ). Thus, the core 23 is fixed to the yoke 25 . The yoke 25 forms a magnetic circuit together with the iron core 23 .

The length of the first yoke 251 (the dimension along the first axis A1 ) is greater than the distance between the upper flange portion 62 (upper flange main body 621 ) and the lower flange portion 63 (upper wall portion 631 ) of the frame 22 . The width (dimension along the third axis A3 ) of the first yoke 251 is substantially the same as the diameter of the coil 21 . The first yoke 251 covers substantially the entirety of the coil 21 in a side view viewed from the right side.

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

As shown in FIGS. 5 and 8 , the insulating member 24 includes a main body portion 241, a covering portion (first covering portion) 242, a first connecting portion 243, a second covering portion 244, a second connecting portion 245, a pair of first protrusions part 246 and a pair of second protrusions 247. The main body part 241, the first covering part 242, the first connecting part 243, the second covering part 244, the second connecting part 245, the pair of first protruding parts 246 and the pair of second protruding parts 247 serve as a composite material having electrical insulation properties. Formed integrally with a molded body of resin.

The main body portion 241 has a plate shape with a substantially C-shaped cross section perpendicular to the first axis A1. The main body portion 241 faces the right side of the coil 21 and covers the coil 21 from the right side. The left surface of the main body part 241 has a central part extending forward and backward along the third axis A3 in a manner compatible with the curvature of the right side of the coil 21, and a center part inclined from both ends of the third axis A3 of the central part with respect to the central part. Both ends of the way extend to the left front and the left rear. Moreover, the main body part 241 is covered by the 1st yoke 251 from the right side.

The first covering part 242 is located below the main body part 241 . The first covering portion 242 has a plate shape having a width along the second axis A2.

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

The first 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 second yoke 252 . For example, after the first covering part 242 is inserted into the internal space of the lower flange part 63 from the right side through the opening part 630, the second yoke 252 is passed through the opening part 630 from the right side under the first covering part 242. It is inserted into the inner space of the lower flange part 63 . Here, the first covering portion 242 is press-fitted into the lower flange portion 63 through the opening portion 630 . Furthermore, the second yoke 252 is inserted into the inner space of the lower flange portion 63 through the opening portion 630 , and is press-fitted between the lower wall portion 632 of the lower flange portion 63 and the first covering portion 242 . Thus, 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 frame 22 , even if the electromagnetic relay 100 vibrates, the frame 22 or the insulating member 24 is unlikely to be damaged.

FIG. 9 shows a horizontal cross-sectional view of the electromagnet block 2 at an imaginary plane passing through the lower flange portion 63 . As shown in FIG. 9 , the lower flange portion 63 of the frame 22 includes a frame side guide portion 69 . The frame side guide portion 69 is an inclined surface formed on the right side surfaces of the front wall portion 633 and the rear wall portion 634 at the entrance of the opening portion 630 of the lower flange portion 63 . The frame-side guide portion 69 guides the first covering portion 242 of the insulating member 24 . Since the lower flange part 63 has the frame|frame side guide part 69, attachment of the insulating member 24 to the frame|frame 22 becomes easy.

As shown in FIG. 9 , the first covering portion 242 of the insulating member 24 includes the insulating member side guide portion 240 . The insulating member side guide portion 240 is an inclined surface formed on the rear side surfaces of the front cover portion 292 and the rear cover portion 293 of the first cover portion 242 . The insulating member side guide portion 240 guides the second 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 furthermore the attachment of the yoke 25 to the frame 22 becomes easy. In addition, the second yoke 252 has inclined surfaces 255 at both corners of the top end (left end). Since the second yoke 252 has the inclined surface 255 , attachment of the yoke 25 to the insulating member 24 becomes easy.

In the state where the first covering portion 242 and the second yoke 252 are inserted into the opening 630, as shown in FIG. The covering portion 242 , the upper wall portion 631 of the lower flange portion 63 , and the coil 21 are arranged in order from below along the first axis A1 . Therefore, the upper surface of the first covering portion 242 (the upper surface of the upper covering portion 291 ) is covered from above by the upper wall portion 631 of the lower flange portion 63 . In addition, the lower surface of the second yoke 252 is covered from below by the lower wall portion 632 of the lower flange portion 63 . That is, in the electromagnetic relay 100, on the first axis A1, the upper wall portion 631 of the lower flange portion 63 and the first covering portion 242 (upper side covering portion 291) of the insulating member 24 are interposed between the coil 21 and the second yoke. Iron 252 between. Therefore, in a cross section perpendicular to the third axis A3, the shortest path between the coil 21 and the second yoke 252 is the path shown by the two-dot chain line L1 in FIG. 10B . Thereby, the insulation distance between the coil 21 and the yoke 25 can be increased compared with the electromagnetic relay of the comparative example in which an insulating member does not have a 1st covering part. In addition, in FIG. 10B, for convenience of description, it draws so that a gap may be formed between components. Furthermore, since the first covering portion 242 covers the second yoke 252 from three directions (upper, front, and rear) as described above, the insulation distance between the coil 21 and the second yoke 252 can be further increased. Furthermore, since the first covering portion 242 does not cover the lower surface of the second yoke 252 , an increase in the size of the electromagnet block 2 along the first axis A1 can be suppressed.

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

The second covering part 244 is located above the main body part 241 . The second covering portion 244 has a plate shape having a width along the second axis A2.

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

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

As shown in FIG. 4 , the height position (position on the first axis A1) of the upper surface of the second covering portion 244 is the same as the height position of the base portion 641 of the first wall portion 64 of the upper flange portion 62 and the height position of the second wall portion 65. The height positions of the bases 651 are approximately the same.

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

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

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

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

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

(2.2) Movable block

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

The movable spring 31 includes a foot 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 has a rectangular plate shape extending along the first axis A1. The two leg pieces 35 are arranged along the third axis A3. The leg piece 35 is a terminal connected to an external electronic device. As shown in FIG. 1 , the leg piece 35 is exposed downward from the housing 9 .

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

The spring piece 37 is in the shape of an inverted L-shaped plate turned upside down when viewed from the front. The spring piece 37 has flexibility. The spring piece 37 has a plate-shaped first leaf 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 first leaf spring portion 371 , and a leftward bend from the left end of the bent portion 372 . The second leaf spring portion 373 extending in the opposite direction.

The movable piece 38 has a plate shape extending leftward from the left end of the second plate spring portion 373 of the spring piece 37 . The joint portion between the movable piece 38 and the spring piece 37 (second plate spring portion 373 ) is curved in a V-shape in a front view. The movable piece 38 can move up and down along the first axis A1 according to the deflection of the spring piece 37 . The movable piece 38 is inclined relative to the normal direction of the fixed piece 36 .

The movable piece 38 includes an armature holding portion 381 and a contact holding portion 382 . The armature holding portion 381 is located relatively to the right of the movable piece 38 . The contact holding portion 382 is located relatively to the left of the movable piece 38 .

The armature holding portion 381 holds the armature 33 . The three fixing holes 313 are formed in the armature holding portion 381 so as to line up along the third axis A3 .

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

As shown in FIG. 11 , the armature 33 includes an armature body 331 , a fixing protrusion 332 and a hooking piece 333 . The armature 33 includes three fixing protrusions 332 . In addition, the armature 33 includes two hooking pieces 333 . The armature main body 331 , the three fixing protrusions 332 and the two hooking pieces 333 are integrally formed of a magnetic material.

The armature main body 331 has a substantially rectangular plate shape in plan view. Three fixing protrusions 332 are disposed on the upper surface of the armature main body 331 . The three fixing protrusions 332 are arranged in a row along the third axis A3. The armature 33 is fixed to the movable spring 31 by inserting the three fixing protrusions 332 of the armature 33 into the three fixing holes 313 of the armature holding part 381 of the movable spring 31 from the lower side, and crushing the top ends of the fixing protrusions 332 . (The armature holding part 381). The armature 33 is arranged under the movable spring 31 and is 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 FIGS. 2 and 3 , when 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 ).

The armature 33 has a first end E1 and a second end E2 on a second axis A2 intersecting the first axis A1 in plan view (see FIG. 11 ). In this embodiment, the first end E1 is the left end, and the second end E2 is the right end.

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

As shown in FIG. 11 , the movable contact member 32 includes a head portion 321 and a trunk portion 322 .

The shape of the head portion 321 is a conical shape. The axis of the head 321 is along the first axis A1. The lower surface of the head 321 functions as a movable contact M1. The lower surface of the movable contact member 32 that functions as the movable contact M1 is formed of, for example, a silver alloy (AgNi or AgSnO ₂ ). Parts of the movable contact member 32 other than the movable contact M1 are formed of copper alloy such as ductile copper, for example. The surface (lower surface) functioning as the movable contact M1 in the movable contact member 32 is spherical. In addition, the surface (lower surface) functioning as the movable contact M1 in the movable contact member 32 may be flat or dome-shaped.

The trunk 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 trunk portion 322 passes through the through hole 314 of the contact holding portion 382 . Thereby, the movable contact member 32 is electrically connected to the movable spring 31 .

In addition, the movable contact M1 may be integrally formed with the movable spring 31 . For example, a part of the metal plate constituting the movable spring 31 may protrude downward, and the tip of the protruded part may be used as the movable contact M1.

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

(2.3) Fixed block

As shown in FIGS. 3 and 12 , the fixed block 4 includes a holding platform 41 , a conductive member 42 , a fixed contact member 43 and an auxiliary member 44 .

The holding table 41 has a rectangular box shape with an open right surface. As shown in FIGS. 12 and 13 , the holding stand 41 includes a left wall 45 , a front wall 46 , a rear wall 47 , a lower wall 48 , an upper wall 49 , and an auxiliary wall 40 . The left wall 45 , the front wall 46 , the rear wall 47 , the lower wall 48 , the upper wall 49 , and the auxiliary wall 40 are integrally formed as an electrically insulating synthetic resin molding.

An engaging hole 411 is formed at the right end of the lower wall 48 . On the upper end of the right side surface of the front wall 46, a recess 412 is formed which is depressed leftward along the second axis A2. At the upper end of the right side surface of the rear wall 47 is formed a recess 413 which is recessed leftward along the second axis A2. A holding groove 414 extending along the second 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 protruding plate portion 624 of the upper flange portion 62 of the frame 22 are respectively inserted into the recess 412 of the front wall 46 and the recess 413 of the rear wall 47 . The holding protrusion 625 of the upper flange portion 62 of the frame 22 is inserted (here, press-fitted) into the holding groove 414 of the upper wall 49 . The engaging protrusion 638 of the lower flange portion 63 of the frame 22 is engaged with the engaging hole 411 of the lower wall 48 . Thereby, the fixing block 4 is combined with the main body block 10 . In a state where the fixing block 4 is coupled to the main body block 10 , the left wall 45 of the holding table 41 faces the left side of the coil 21 and covers the coil 21 from the left side (see FIG. 2 ).

On the upper surface of the upper wall 49, a protruding wall portion 415 protruding upward along the first axis A1 is provided. The protruding wall portion 415 extends forward and backward along the third axis A3.

As shown in FIG. 13 , a holding recess 416 depressed to the right is formed at the lower end portion of the left surface of the left wall 45 . A holding recess 417 recessed to the right is formed on the left surface of the rear wall 47 along the first axis A1.

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

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

The leg piece 421 has a plate shape extending along the first axis A1. The two leg pieces 421 are arranged along the third axis A3. The leg piece 421 is a terminal connected to an external electronic device. As shown in FIG. 1 , the leg piece 421 is exposed downward from the housing 9 .

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

The first fixing piece 423 has a plate shape extending rightward from the lower end of the central piece 422 along the second axis A2. The first fixing piece 423 extends from a portion between the two leg pieces 421 at the lower end of the central piece 422 .

The second fixing piece 424 has a plate shape extending rightward along the second axis A2 from the rear edge of the central piece 422 . The second fixing piece 424 extends from the center on the first axis A1 at the rear edge of the central piece 422 .

The first fixing piece 423 is inserted into the holding recess 416 of the holding table 41 from the left. The second fixing piece 424 is inserted into the holding recess 417 of the holding table 41 from the left. Accordingly, the conductive member 42 is held by the holding table 41 .

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

The holding piece 425 has a plate shape whose thickness axis is along the first axis A1. The holding piece 425 extends rightward from the upper end of the central piece 422 . The holding piece 425 is located above the upper wall 49 of the holding platform 41 . The holding piece 425 has a through hole 426 in the center.

The conductive member 42 has a through hole 427 at a joint between the central sheet 422 and the holding sheet 425 . Therefore, the current flowing in the holding piece 425 includes not only a component along the second axis A2 but also a component along the third axis A3. The current component along the third axis A3 exerts a Lorentz force in a direction intersecting the first axis A1 to an arc that may be generated between the movable contact M1 and the fixed contact F1 along the first axis A1, and accelerates the arc disappears.

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

The shape of the head 431 is a conical shape. The axis of the head 431 is along the first axis A1. The upper surface of the head 431 functions as a fixed contact F1. The upper surface of the fixed contact member 43 functioning as the fixed contact F1 is formed of, for example, a silver alloy (AgNi or AgSnO ₂ ). Parts of the fixed contact member 43 other than the fixed contact F1 are formed of a copper alloy such as ductile copper, for example. The surface (upper surface) functioning as the fixed contact F1 of the fixed contact member 43 is spherical. In addition, the surface (upper surface) functioning as the fixed contact F1 of the fixed contact member 43 may be flat or dome-shaped.

The trunk portion 432 protrudes from the lower end of the head portion 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 . Thus, the fixed contact member 43 is electrically connected to the conductive member 42 .

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

As shown in FIGS. 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 first axis A1 . As the movable piece 38 of the movable spring 31 moves up and down, the movable contact M1 is brought into contact with and separated from the fixed contact F1. In addition, the protruding wall portion 415 is interposed between the fixed contact F1 and the core 23 (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 sheet 441 and the upper sheet 442 are integrally formed of a conductive metal material.

The side piece 441 has a plate shape extending along the first axis A1. The side sheet 441 has a recess 443 recessed leftward along the second axis A2 on the right side. The auxiliary member 44 is positioned with respect to the holding table 41 on the first axis A1 by the recess 443 .

The upper piece 442 has a plate shape extending rearward along the third axis A3 from the upper end of the side piece 441 . On the lower surface of the upper sheet 442, a protrusion 444 protruding downward relative to other parts of the upper sheet 442 is provided. The protrusion 444 can be formed, for example, by pressing out a portion corresponding to the protrusion 444 on the upper surface of the upper sheet 442 downward from the upper side. The lower surface of the protrusion 444 is opposed to the upper surface of the trunk portion 322 of the movable contact member 32 .

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

(2.4) Relay body

The relay main body 1 is constituted by combining 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 to the left along the second axis A2, and the two fixing protrusions 253 of the first yoke 251 are respectively inserted into the two fixing holes 311 of the fixing piece 36 of the movable spring 31, and pressed. The top end of the flat fixing protrusion 253 . Thus, the movable block 3 is fixed to the electromagnet block 2 . Thereby, the main body block 10 (refer FIG. 3) which combines the electromagnet block 2 and the movable block 3 is comprised.

In addition, as shown in FIG. 3 , the fixing block 4 is positioned to the left of the main body block 10 . And the fixed block 4 is moved to the right along the second axis A2, the projecting plate portion 624 of the upper flange portion 62 of the frame 22 is inserted into the recesses 412, 413 of the holding table 41, and the holding of the upper flange portion 62 The protrusion 625 is inserted into the holding groove 414 of the holding table 41 , and the engaging protrusion 638 (see FIG. 7 ) of the lower flange portion 63 is engaged with the engaging hole 411 of the holding table 41 . Thereby, the fixed block 4 is fixed to the main body block 10 (refer FIG. 2). In addition, the frame 22 may be further fixed to the holding table 41 by adhesion or the like.

Thus, electromagnetic relay 100 includes a main terminal block (frame 22 and insulating member 24 ) including frame 22 and holding movable spring 31 , and a sub-terminal block (holding block 41 ) holding fixed contact F1 . The auxiliary terminal block is independent from the main terminal block and fixed to the main terminal block. In the electromagnetic relay 100 of this embodiment, the main terminal block and the sub-terminal block are independent from each other. Therefore, adjustment (alignment of components, adjustment of spring force, etc.) of components held by one terminal block (eg, main terminal block) can be performed separately from adjustment of components held by another terminal block (eg, sub-terminal block). Thereby, the manufacturing process of the electromagnetic relay 100 can be simplified.

In addition, in the relay body 1 of the electromagnetic relay 100 of this embodiment, the insulating member 7 (holding base 41 ) is arranged 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 addition, in the relay main body 1 of the electromagnetic relay 100 of this embodiment, the main circuit components include the movable spring 31 , the conductive member 42 , the iron core 23 , the armature 33 , and the yoke 25 . In the electromagnetic relay 100, the holding piece 425 of the conductive member 42 in the main circuit part, the fixed contact member 43 (fixed contact F1), and the movable piece 38 of the movable spring 31 (movable contact M1) are arranged on the frame 22 above. That is, in the electromagnetic relay 100 , the fixed contact F1 and the movable contact M1 are provided above the bobbin 22 .

In addition, in the relay body 1 of the electromagnetic relay 100 of the present embodiment, the insulating member 24 includes the first covering portion 242 . Therefore, in a cross section perpendicular to the third axis A3, the shortest path between the coil 21 and the second yoke 252 is a path bypassing the first covering portion 242 as indicated by the dashed-two dotted line L1 in FIG. 10B . Accordingly, the insulation distance between the coil 21 and the second yoke 252 can be increased, and the insulation distance between the coil 21 and the main circuit components can be further increased.

In addition, in the relay body 1 of the electromagnetic relay 100 of the present embodiment, the insulating member 24 includes the second covering portion 244 . Therefore, in a cross section perpendicular to the third axis A3, the shortest path between the coil 21 and the armature 33 is a path bypassing the second covering portion 244 as indicated by the two-dot chain line L2 in FIG. 10C . Accordingly, 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 components can be further increased. In addition, in FIG. 10C, for convenience of description, it draws so that a gap may be formed between components.

In addition, in the relay body 1 of the electromagnetic relay 100 of the present embodiment, the third wall portion 66 of the upper flange portion 62 of the frame 22 is interposed between the magnetic pole portion 231 of the core 23 and the fixed contact F1 on the second axis A2. between. Therefore, in a cross section perpendicular to the third axis A3, the shortest path between the coil 21 and the core 23 is a path bypassing the third wall portion 66 as indicated by the dashed-two dotted line L3 in FIG. 10D . Accordingly, the insulation distance between the coil 21 and the core 23 can be increased, and the insulation distance between the coil 21 and the main circuit components can be further increased. In addition, in FIG. 10D, for convenience of description, it draws so that a gap may be formed between components.

In addition, in the relay body 1 of the electromagnetic relay 100 of this embodiment, the projecting wall portion 415 of the holding table 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 second axis A2. between the fixed contacts F1. Therefore, in a cross section perpendicular to the third axis A3, the shortest path between the coil 21 and the fixed contact F1 is a path bypassing the insulating wall portion 70 as indicated by the dashed-two dotted line L4 in FIG. 10D . Accordingly, the insulation distance between the coil 21 and the fixed contact F1 can be increased, and the insulation distance between the coil 21 and the main circuit components can be further increased.

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

In the relay main body 1, when no voltage is applied between the two coil terminals 26 and the coil 21 is not energized (hereinafter also referred to as "non-energized state"), as shown in FIG. Under the action of spring force, the movable contact M1 is separated from the fixed contact F1. Accordingly, the electrical circuit between the leg piece 421 of the conductive member 42 and the leg piece 35 of the movable spring 31 is cut off.

In the relay body 1, when a voltage is applied between the two coil terminals 26 and the coil 21 is energized (hereinafter also referred to as "energization"), the armature 33 is generated between the armature 33 and the magnetic pole portion 231 of the core 23. The attractive force attracts downward toward the magnetic pole portion 231 along the first axis A1. Accordingly, the armature 33 rotates around the hook piece 333 as a fulcrum (counterclockwise in a front view), and the lower surface of the armature 33 contacts the upper surface of the magnetic pole portion 231 of the core 23 . During energization, the core 23 , the yoke 25 , and the armature 33 form a magnetic path through which the magnetic flux generated by the coil 21 passes. The yoke 25 and the armature 33 constituting part of the magnetic circuit are connected between the two ends of the iron core 23 in an inverted C shape in a front view.

During energization, the movable contact M1 moves downward together with the armature 33 due to the rotation of the armature 33 . As a result, the movable contact M1 comes into contact with the fixed contact F1 at the time of energization. Thus, an electrical circuit is formed between the leg piece 421 of the conductive member 42 and the leg piece 35 of the movable spring 31 .

In the relay main body 1 , when the energization of the coil 21 is stopped, the attractive force between the core 23 and the armature 33 disappears. Therefore, in the relay body 1 , the armature 33 is rotated around the hook piece 333 (clockwise when viewed from the front) 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 separates from the fixed contact F1. Thus, 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 switching between excitation and de-excitation of the coil 21 . The closed position is the position of the movable spring 31 where the movable contact M1 is in contact with the fixed contact F1. The open position is the position of the movable spring 31 where the movable contact M1 is separated from the fixed contact F1.

In the relay main body 1 (electromagnetic relay 100 ) of this embodiment, the movable contact M1 moves along the contact/separation axis X1, and contacts and/or separates from the fixed contact F1. The contact and separation axis X1 is along the first axis A1.

(2.5) Shell

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

As shown in FIGS. 2 and 14 , the casing 9 includes a casing main body 90 . The case main body 90 constitutes the 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 case 9 further includes a first protrusion 961 and two first connection parts 962 inside the case main body 90 . The first protrusion 961 has a plate shape extending along the first axis A1. The first protrusion 961 extends along the second axis A2. The first protrusion 961 faces the front wall 92 with a gap on the third axis A3. The two first connecting portions 962 connect both end portions of the first protrusion portion 961 on the second axis A2 and the rear surface of the front wall 92 , respectively. A first recess 96 with an open lower surface is formed by the front wall 92 of the case main body 90 , the first protruding portion 961 and the two first connecting portions 962 .

The case 9 further includes a second protrusion 971 and two second connection parts 972 inside the case main body 90 (see FIG. 15 ). The second protrusion 971 has a plate shape extending along the first axis A1. The second protrusion 971 extends along the second axis A2. The second protrusion 971 faces the rear wall 93 with a gap on the third axis A3. The two second connecting portions 972 connect both end portions of the second protrusion portion 971 on the second axis A2 and the front surface of the rear wall 93 , respectively. A second recess 97 with an open lower surface is formed by the rear wall 93 of the case main body 90 , the second protruding portion 971 and the two second connecting portions 972 .

As shown in FIG. 15 , the first wall portion 64 (more specifically, the protruding rib 642 ) of the upper flange portion 62 of the frame 22 is inserted into the first recess 96 . Therefore, the first protrusion 961 faces the first wall 64 (more specifically, the rib 642 ) on the third axis A3. In addition, the first connecting portion 962 is inserted into the first concave portion 643 . The two first connection parts 962 are respectively inserted into the two first concave parts 643 . The first wall portion 64 (more specifically, the rib 642 ) is surrounded by the first protrusion portion 961 , the two first connection portions 962 , and the front wall 92 in four directions, front, rear, left, and right.

As shown in FIG. 15 , the second wall portion 65 (more specifically, the protruding rib 652 ) of the upper flange portion 62 of the frame 22 is inserted into the second recess 97 . Therefore, the second protrusion part 971 faces the second wall part 65 (more specifically, the protrusion rib 652 ) on the third axis A3. In addition, the second connecting portion 972 is inserted into the second concave portion 653 . The two second connection parts 972 are inserted into the two second recesses 653, respectively. The second wall portion 65 (more specifically, the rib 652 ) is surrounded by the second protrusion portion 971 , the two second connection portions 972 , and the rear wall 93 in four directions, front, rear, left, and right.

FIG. 16A is a cross-sectional view of electromagnetic relay 100 on a virtual plane perpendicular to second axis A2. In the electromagnetic relay 100 of this embodiment, the upper flange portion 62 is interposed between the armature 33 and the coil 21 on the first axis A1. Therefore, in a cross section perpendicular to the second 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 this embodiment, the upper flange portion 62 includes the first wall portion 64 and the second wall portion 65, and the first wall portion 64 and the second wall portion 65 are inserted into the first wall portion of the case 9, respectively. 1 recess 96 and the 2nd recess 97. Therefore, in a cross section perpendicular to the second axis A2, the shortest path between the armature 33 and the coil 21 is, for example, the first protruding portion 961 and the The S-shaped path of the space S1 between the first wall portions 64 (protruding ribs 642 ). Accordingly, 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 components can be further increased. In addition, in FIG. 16B, for convenience of description, it draws so that a gap may be formed between components.

In the electromagnetic relay 100 of this embodiment, as shown in FIG. 16A , on the first axis A1, the lower ends of the first protruding portion 961 and the second protruding portion 971 of the case 9 are positioned lower than the upper surface of the core 23 ( The upper surface of the magnetic pole portion 231) is closer to the lower side. Furthermore, the upper end of the first wall portion 64 (the upper end of the protruding rib 642 ) and the upper end of the second wall portion 65 (the upper end of the protruding rib 652 ) of the frame 22 are located above the upper surface of the core 23 . The armature 33 moves up and down along the first axis A1 , but cannot move below the upper surface of the core 23 , so the armature 33 is always positioned above the upper surface of the core 23 . Since the lower end of the first protruding portion 961 (the lower end of the second 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 double-dashed line L5 ) ) becomes a path that bypasses the first protrusion 961 (second protrusion 971). Therefore, in the electromagnetic relay 100 of the present embodiment, compared with the electromagnetic relay of the comparative example in which the lower end of the first protrusion (second protrusion) is positioned above the upper surface of the core, the number of relays can be increased. The insulation distance between the coil 21 and the armature 33 can increase the insulation distance between the coil 21 and the main circuit components.

In the electromagnetic relay 100 of this embodiment, as shown in FIG. 16A , the lower end of the first protrusion 961 of the case 9 is aligned with the upper surface (the first wall) of the upper flange 62 of the frame 22 on the first axis A1. The upper surface of the base portion 641 of the portion 64) contacts. The upper end of the first wall portion 64 of the upper flange portion 62 of the frame 22 is separated from the case 9 on the first axis A1. Further, the lower end of the second protrusion 971 of the housing 9 is in contact with the upper surface of the upper flange 62 of the frame 22 (the upper surface of the base 651 of the second wall 65 ) on the first axis A1. The upper end of the second wall portion 65 of the upper flange portion 62 of the frame 22 is separated from the case 9 on the first axis A1. In the electromagnetic relay 100, the insulation distance between the coil 21 and the armature 33 can be increased by contacting the lower end of the first protruding portion 961 and the lower end of the second protruding portion 971 with the upper surface of the upper flange portion 62, thereby increasing Insulation distance between coil 21 and main circuit components.

In the electromagnetic relay 100 of this embodiment, as shown in FIG. 15 , the first protruding portion 961 and the second protruding portion 971 are provided at least at positions overlapping with an imaginary line extending from the center of the core 23 along the third axis A3. Location. The center of the core 23 substantially coincides with the center of the coil 21 . Therefore, the first protruding portion 961 and the second protruding portion 971 are provided at least at positions overlapping with an imaginary line extending from the center of the coil 21 along the third axis A3 in plan view. In addition, the 1st recessed part 643 and the 2nd recessed part 653 are not provided in the position which overlaps with the said imaginary line. Therefore, the shortest path between the armature 33 and the coil 21 is a path that bypasses the first protrusion 961 and the rib 642 or the second protrusion 971 and the rib 652 . Accordingly, 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 components can be further increased.

In addition, in the electromagnetic relay 100 of this embodiment, the protruding rib 642 (or the first concave portion 643 ) of the first wall portion 64 and the first connection portion 962 of the case 9 also serve to position the case 9 relative to the relay body 1 . role. Similarly, the protruding rib 652 (or the second concave portion 653 ) of the second wall portion 65 and the second connecting portion 972 of the case 9 also serve to position the case 9 relative to the relay body 1 . That is to say, the positioning part has the function of increasing the insulation distance. Accordingly, it is possible to increase the insulation performance while reducing the number of components.

In addition, in the electromagnetic relay 100 of this embodiment, since the first protruding portion 961 and the second protruding portion 971 are respectively adjacent to the front side and the rear side of the armature 33, it is possible to prevent the armature 33 from being damaged due to an external impact. A condition of excessive mobility. Accordingly, deformation of the movable spring 31 fixed to the armature 33 can be suppressed. In other words, the function of improving the impact resistance performance is combined with the positioning member. Thereby, impact resistance can be improved 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 components and the coil 21 compared with conventional ones. Conversely, it is possible to reduce the size of the electromagnetic relay 100 while maintaining the same insulation performance as conventional ones. Alternatively, the power consumption at the coil 21 can be reduced by increasing the size of the coil 21 while maintaining the same insulation performance as conventional ones.

(3) Variations

The above-mentioned embodiment is only one of various embodiments of the present disclosure. As long as the above-mentioned embodiment can achieve the object of the present disclosure, various changes can be made according to the design or the like. Hereinafter, modification examples of the embodiment will be listed. Hereinafter, the above-described embodiment may also be referred to as a "basic example". The basic example described above and the modified examples described below can be applied in combination as appropriate.

(3.1) First modified example

17 and 18 , an electromagnetic relay 100A according to this modified example will be described. Regarding the same configuration as the electromagnetic relay 100 of the basic example, explanations may be appropriately omitted.

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 frame 22 is formed at the center of the upper flange portion 62 on the third axis A3. On the other hand, in the electromagnetic relay 100A of this modified example, as shown in FIG. 17 , the hole 622A of the upper flange portion 62A of the frame 22A is formed relatively close to the center of the upper flange portion 62A on the third axis A3. rear position. Therefore, also in electromagnetic relay 100A of this modified example, core 23A and coil 21 are formed on the third axis A3 at relatively rear positions relative to the center of flange portion 62A.

Moreover, in 100 A of electromagnetic relays of this modification, as shown in FIG. 17, 64 A of 1st wall parts and 65 A of 2nd wall parts are asymmetrical in planar view. That is, the rib 652A of the second wall portion 65A relatively closer to the center of the hole 622A (the center of the coil 21 ) is longer than the rib 642A of the first wall portion 64A relatively far from the center of the hole 622A (the center of the coil 21 ). (The dimension along the second axis A2) is long. Accordingly, on the rear side where the insulation distance between the core 23A and the coil 21 is relatively short, the insulation distance between the armature 33 and the coil 21 is relatively increased by the second wall portion 65A.

Moreover, as shown in FIG. 18, in 100 A of electromagnetic relays of this modification, 96 A of 1st recesses and 97 A of 2nd recesses are asymmetrical in planar view. That is, the length of the first protrusion 961A (dimension along the second axis A2) and the length of the first connecting portion 962A are determined so that the rib 642A of the first wall 64A fits into the first recess 96A. The position of the second axis A2. In addition, the length of the second protrusion 971A (dimension along the second axis A2) and the length of the second connecting portion 972A are determined so that the rib 652A of the second wall 65A fits into the second recess 97A. The position of the second axis A2.

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

(3.2) Other modifications

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

In a modified example, the first covering portion 242 may not cover the second yoke 252 from three directions, but may include only the upper covering portion 291 and cover the second yoke 252 only from above, for example.

In a modified example, the first covering part 242 may further include a lower covering part that covers the second yoke 252 from below.

In a modified example, a liquid sealing material (for example, epoxy-based resin) may be made to flow to the lower surface side of the lower flange portion 63, and the lower flange portion 63 and the yoke 25 may be sealed by the cured sealing material. (The second yoke 252) is combined. Since the lower flange portion 63 has the lower wall portion 632 having higher wettability to the sealing material than the second yoke 252, sealing by the sealing material becomes easy. In addition, since the lower surfaces of the second yoke 252 and the iron core 23 (thin portion 232 ) are exposed from the hole 637 of the lower wall portion 632 of the lower flange portion 63 , sealing by the sealing material becomes easier. At this time, the lower flange portion 63 of the frame 22 and the insulating member 24 are also bonded by the sealing material.

In a modified example, in the first wall portion 64 , the base portion 641 and the protruding rib 642 may have the same thickness (dimension along the third axis A3 ). The same applies to the second wall portion 65 .

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

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

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

In a modified example, the movable contact M1 and the fixed contact F1 may be provided on the lower side of the frame 22 . In this case, for example, the second yoke 252 may be arranged above the frame 22, and the first protrusion 961 and the first wall 64 may be provided so as to cover the front side of the second yoke 252, so that The second protrusion 971 and the second wall 65 are provided so as to cover the rear surface of the second yoke 252 .

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

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

In the basic example described above, the contact device is a so-called a-contact (normally open contact) that cuts off the circuit when the current is not supplied, but it is not limited thereto. In a modified example, the contact device may be a so-called b contact (normally closed contact) that forms a circuit when no current is applied. In a modified example, the contact device may be a so-called c-contact that has two fixed contacts F1 and the movable contact M1 is in contact with different fixed contacts F1 when energized and when it is not energized. When the contact device is a b-contact or a c-contact, the lower surface of the protrusion 444 of the auxiliary member 44 may be utilized as the fixed contact F1.

(4) way

From the embodiments and modifications described above, it is clear that the following aspects are disclosed in this specification.

The electromagnetic relay 100 (100A) of the first mode includes: a coil 21; a frame 22 around which the coil 21 is wound; an iron core 23 extending up and down and penetrating through the frame 22; a fixed contact part 400 having a fixed contact F1; movable spring 31, which has a movable contact M1 opposite to the fixed contact F1, corresponding to the switching of the excitation and non-excitation of the coil 21 in the closed position where the movable contact M1 is in contact with the fixed contact F1 and The movable contact M1 and the fixed contact F1 move between the disconnected positions; and the housing 9 accommodates the coil 21, the skeleton 22, the fixed contact F1 and the movable contact M1 inside, and the fixed contact portion 400 and at least a part of the main circuit components that are electrically connected to the movable spring 31 are disposed above the frame, and the frame 22 has: a main body 61 for winding the coil 21; and an upper flange 62 that is provided on the main body 61 The upper part, the upper flange portion 62 has: a first wall portion 64, which extends upward; and a second wall portion 65, which extends upward, and is opposite to the first wall portion 64, the first wall portion 64 has a first Recess 643, the second wall portion 65 has a second recess 653, and the housing 9 has: a housing body 90, which constitutes the outer contour of the housing 9; Opposite to the first wall part 64; the first connecting part 962, which is connected to the first protruding part 961, is at least partially inserted into the first concave part 643; the second protruding part 971, which is provided Partially facing the second wall part 65 ; and the second connecting part 972 , which is provided inside the case body 90 , connected to the second protruding part 971 , and at least partly inserted into the second recessed part 653 .

In addition, as an example of the main circuit components arranged above the frame 22, the holding piece 425 of the conductive member 42, the fixed contact member 43, and the movable piece 38 of the movable spring 31 can be mentioned (see FIG. 11 or FIG. 12 ). .

According to this aspect, the insulation between the fixed contact portion 400 and the movable spring 31 and the coil 21 can be achieved by using the first protrusion 961 , the first wall 64 , the second protrusion 971 , and the second wall 65 . increase in distance. Accordingly, it is possible to increase the insulation distance between the coil 21 and the main circuit member (conductive member electrically connected to the contact device including the fixed contact F1 and the movable contact M1). In addition, using the first recess 643 of the first wall 64 and the first connecting portion 962 of the housing 9 and/or the second recess 653 of the second wall 65 and the second connecting portion 972 of the housing 9, the housing can be connected. Positioning of the body 9 relative to the frame 22. In addition, 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.

Electromagnetic relay 100 ( 100A) of the second aspect further includes insulating member 7 (holding base 41 ) disposed between fixed contact portion 400 and coil 21 .

According to this aspect, it is possible to increase the insulation distance between the coil 21 and the main circuit components.

In the electromagnetic relay 100 (100A) of the third aspect, the insulating member 7 (holding base 41) has the insulating wall portion 70 (protruding wall portion 415) extending vertically.

According to this aspect, it is possible to increase the insulation distance between the coil 21 and the main circuit components.

In electromagnetic relay 100 ( 100A) of the fourth aspect, insulating wall portion 70 (protruding wall portion 415 ) is located between fixed contact F1 and coil 21 .

According to this aspect, it is possible to increase the insulation distance between the coil 21 and the main circuit components.

In the electromagnetic relay 100 (100A) of the fifth aspect, the first wall portion 64 has two first recesses 643 located at both ends of the first wall portion 64 as the first recesses 643, and the second wall portion 65 has two first recesses 643 located on the second wall. The two second recesses 653 at both ends of the portion 65 serve as the second recesses 653 .

According to this aspect, it is possible to increase the insulation distance between the coil 21 and the main circuit components.

In the electromagnetic relay 100 (100A) of the sixth aspect, the housing 9 has two first connection portions 962 inserted into the two first recesses 643 as the first connection portions 962, and has two second recesses 653 as the first connection portions. The two second connecting parts 972 inserted separately serve as the second connecting parts 972, and the first recess 96 into which the first wall part 64 is inserted is formed by the case main body 90, the two first connecting parts 962 and the first protrusion part 961. , the second recess 97 into which the second wall portion 65 is inserted is formed by the case main body 90 , the two second connecting portions 972 and the second protrusion portion 971 .

According to this aspect, it is possible to increase the insulation distance between the coil 21 and the main circuit components.

In 100A of electromagnetic relays according to the seventh aspect, the first wall portion 64 and the second wall portion 65 are asymmetrical in plan view.

According to this aspect, the insulation distance between the coil 21 and the main circuit component can be increased according to the positional relationship between the coil 21 and the main circuit component.

In electromagnetic relay 100 ( 100A) of the eighth aspect, frame 22 further includes third wall portion 66 extending upward on upper flange portion 62 and located between first wall portion 64 and second wall portion 65 .

According to this aspect, it is possible to increase the insulation distance between the coil 21 and the main circuit components.

In electromagnetic relay 100 ( 100A) of the ninth aspect, fixed contact F1 and movable contact M1 are provided above bobbin 22 .

According to this aspect, 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) of the tenth aspect, the lower end of the first protrusion 961 of the case 9 is located below the upper surface of the iron core 23, and the upper end of the first wall portion 64 of the frame 22 is located lower than the upper surface of the iron core. The upper surface of 23 is near the position above.

According to this aspect, it is possible to increase the insulation distance between the coil 21 and the main circuit components.

In electromagnetic relay 100 ( 100A) of the eleventh embodiment, the lower end of first protrusion 961 is in contact with the upper surface of upper flange 62 of frame 22 . The upper end of the first wall portion 64 is separated from the casing (9).

According to this aspect, it is possible to increase the insulation distance between the coil 21 and the main circuit components.

Claims (11)

1. An electromagnetic relay, wherein, The electromagnetic relay includes: Coil; a bobbin on which the coil is wound; an iron core extending up and down and penetrating through the frame; a fixed contact portion having a fixed contact; a movable spring having a movable contact opposite to the fixed contact, and corresponding to switching between excitation and de-excitation of the coil, in a closed position where the movable contact is in contact with the fixed contact and moving between an open position in which the movable contact is separated from the fixed contact; and a case housing the coil, the bobbin, the fixed contact, and the movable contact inside, At least a part of the main circuit components electrically connected to the fixed contact portion and the movable spring is arranged above the frame, The skeleton has: a main body portion around which the coil is wound; and an upper flange portion provided on the upper portion of the main body portion, The upper flange portion has: a first wall portion extending upward; and a second wall extending upward and facing the first wall, The first wall portion has a first recess, The second wall portion has a second recess, The housing has: a housing body constituting the outline of said housing; a first protruding part, which is provided on the inner side of the casing body, at least partially facing the first wall part; a first connection part connected to the first protruding part and at least partially inserted into the first concave part; a second protrusion provided on the inner side of the case body and at least partially opposed to the second wall; and The second connecting portion is provided inside the case main body, is connected to the second protrusion, and is at least partially inserted into the second concave portion. 2. The electromagnetic relay according to claim 1, wherein, The electromagnetic relay further includes an insulating member disposed between the fixed contact portion and the coil. 3. The electromagnetic relay according to claim 2, wherein, The insulating member has an insulating wall portion extending up and down. 4. The electromagnetic relay according to claim 3, wherein, 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 first wall portion has two first recesses located at both ends of the first wall portion as the first recesses, The second wall portion has two second recesses located at both ends of the second wall portion as the second recesses. 6. The electromagnetic relay according to claim 5, wherein, The housing has two first connecting portions respectively inserted into the two first recesses as the first connecting portion, and has two second connecting portions respectively inserted into the two second recesses as the first connecting portion. the second connection part, A first recess into which the first wall part is inserted is formed by the case main body, the two first connecting parts, and the first protrusion, A second recess into which the second wall portion is inserted is formed by the case main body, the two second connection portions, and the second protruding portion. 7. The electromagnetic relay according to any one of claims 1 to 6, wherein, The first wall portion and the second wall portion are asymmetrical in plan view. 8. The electromagnetic relay according to any one of claims 1 to 7, wherein, The frame further includes a third wall portion extending upward on the upper flange portion and located between the first wall portion and the second 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 frame. 10. The electromagnetic relay according to any one of claims 1 to 9, wherein, The lower end of the first protrusion of the housing is located below the upper surface of the core, The upper end of the first wall portion of the frame is located above the upper surface of the core. 11. The electromagnetic relay according to any one of claims 1 to 10, wherein, The lower end of the first protruding part is in contact with the upper surface of the upper flange part of the frame, The upper end of the first wall portion is separated from the case.

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