CN115732270A - Electromagnetic relay - Google Patents

Abstract

An electromagnetic relay (1) is provided with a main body (412), a movable contact (422), a yoke (80), and a fixing section (90). One of the main body part (412) and the movable contact (422) is provided with a disposition surface (4222). The yoke (80) is disposed so as to overlap at least a part of the specific region (R1) of the disposition surface (4222). The fixed part (90) has a protrusion (422 b), and the protrusion (422 b) is formed on the movable contact (422) or a movable contact (421) included in the movable contact (422). The fixing portion (90) has an abutting portion (81 ba), and the abutting portion (81 ba) is provided on the yoke (80) and can be abutted by the projection (422 b).

Description

Electromagnetic relay

Technical Field

The present disclosure relates to an electromagnetic relay.

Background

Conventionally, as an electromagnetic relay, an electromagnetic relay is known which includes a fixed contact portion having a fixed contact and a movable contact portion having a movable contact which is movable relative to the fixed contact and which is contactable with and separable from the fixed contact, as disclosed in patent document 1 below.

In patent document 1, the fixed contact and the movable contact are brought into contact with each other and separated from each other, whereby conduction and non-conduction between the fixed contact portion and the movable contact portion can be switched.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2012-104277

Disclosure of Invention

Preferably, when the fixed contact and the movable contact are brought into contact with each other and separated from each other to switch between conduction and non-conduction between the fixed contact portion and the movable contact portion as in the conventional technique, the movable contact and the fixed contact can be prevented from being affected by an arc generated when the contacts are opened.

Accordingly, an object of the present disclosure is to obtain an electromagnetic relay capable of more reliably suppressing the influence of the arc on the contacts.

The electromagnetic relay of the present disclosure includes: an electromagnet arrangement having a coil; a1 st contact; a 2 nd contact which is opposed to the 1 st contact in a front-rear direction and is movable relative to the 1 st contact to be brought into contact with and separated from the first contact; a1 st main body portion having the 1 st contact; a 2 nd main body portion having the 2 nd contact; a yoke fixed to the 2 nd body part; and a fixing portion that fixes the yoke to the 2 nd body portion, the 2 nd body portion having an opposing surface located on a side where the 1 st contact and the 2 nd contact are opposed to each other and an arrangement surface located on an opposite side of the opposing surface, the arrangement surface having a specific region that overlaps with the 1 st body portion when viewed in a front-rear direction, the yoke being arranged so as to at least partially overlap with the specific region when viewed in the front-rear direction, the 2 nd body portion on which the yoke is arranged being configured so that a current flows in the specific region, the fixing portion including: a protrusion provided on the 2 nd body part or the 2 nd contact of the 2 nd body part; and an abutting portion provided in the yoke and against which the projection can abut.

Drawings

Fig. 1 is a perspective view of the electromagnetic relay according to embodiment 1, viewed from obliquely above at 1 st.

Fig. 2 is a perspective view of the electromagnetic relay according to embodiment 1, as viewed obliquely from above at 2 nd angle.

Fig. 3 is a diagram showing the electromagnetic relay according to embodiment 1, and is an exploded perspective view of the electromagnetic relay with the cover removed, as viewed obliquely from above at 1 st.

Fig. 4 is a diagram showing the electromagnetic relay according to embodiment 1, and is an exploded perspective view of the electromagnetic relay in which the cover is removed, as viewed obliquely from above at 2 nd.

Fig. 5 is a plan view showing a member other than the cover of the electromagnetic relay according to embodiment 1.

Fig. 6 is an exploded perspective view of the electromagnetic relay according to embodiment 1, as viewed from obliquely above at 1 st.

Fig. 7 is an exploded perspective view of the electromagnetic relay according to embodiment 1, as viewed from obliquely above at 2 nd angle.

Fig. 8 is an exploded perspective view of the electromagnet device included in the electromagnetic relay according to embodiment 1, as viewed obliquely from above at 1 st.

Fig. 9 is an exploded perspective view of the moving member, the movable portion, and the movable contact portion of the electromagnetic relay according to embodiment 1, as viewed obliquely from above at 1 st.

Fig. 10 is an exploded perspective view of the moving member, the movable portion, and the movable contact portion of the electromagnetic relay according to embodiment 1, as viewed obliquely from above at 2 nd.

Fig. 11 is an exploded perspective view of the auxiliary contact portion of the electromagnetic relay according to embodiment 1, as viewed obliquely from above at 1 st.

Fig. 12 is a view showing the contact and separation of the contact portion and the auxiliary contact portion in embodiment 1, and is a perspective view showing a state in which the contact portion and the auxiliary contact portion are at the 2 nd position.

Fig. 13 is a view showing the contact and separation of the contact portion and the auxiliary contact portion in embodiment 1, and is a perspective view showing a state in which the contact portion and the auxiliary contact portion are at the 1 st position.

Fig. 14 is a view showing the contact and separation of the contact portion and the auxiliary contact portion in embodiment 1, and is a vertical sectional view showing a state in which the contact portion and the auxiliary contact portion are at the 2 nd position.

Fig. 15 is a diagram showing the contact and separation of the contact portion and the auxiliary contact portion in embodiment 1, and is a vertical sectional view showing a state in which the contact portion and the auxiliary contact portion are at the 1 st position.

Fig. 16 is a perspective view showing the inside of the cover according to embodiment 1.

Fig. 17 is a reverse view showing the cover of embodiment 1.

Fig. 18 is a perspective view of the fixed contact part according to embodiment 1 as viewed obliquely from above at 1 st.

Fig. 19 is a perspective view of the fixed contact portion of embodiment 1 viewed obliquely from above at 2 nd angle.

Fig. 20 is a front view showing a fixed contact portion according to embodiment 1.

Fig. 21 is a rear view showing the fixed contact part according to embodiment 1.

Fig. 22 is a side view showing a fixed contact portion according to embodiment 1.

Fig. 23 is a plan view showing the fixed contact portion according to embodiment 1.

Fig. 24 is a perspective view of the contact portion of embodiment 1 as viewed obliquely from above at 1 st.

Fig. 25 is a side view showing a contact portion according to embodiment 1.

Fig. 26 is a perspective view of the movable contact according to embodiment 1, as viewed obliquely from above at 1 st before the yoke is attached.

Fig. 27 is a perspective view of the movable contact according to embodiment 1 as viewed obliquely from above at 2 nd position before the yoke is attached.

Fig. 28 is a side view showing a state before the movable contact of embodiment 1 is attached to the yoke.

Fig. 29 is a plan view showing a state where a yoke is attached to the movable contact according to embodiment 1.

Fig. 30 is a reverse view showing a state where a yoke is attached to the movable contact according to embodiment 1.

Fig. 31 is a front view showing a state in which a yoke is attached to the movable contact according to embodiment 1.

Fig. 32 is a rear view showing a state in which a yoke is attached to the movable contact according to embodiment 1.

Fig. 33 is a side view showing a state in which a yoke is attached to the movable contact according to embodiment 1.

Fig. 34 is a diagram illustrating a specific region provided on the arrangement surface of the movable contact according to embodiment 1.

Fig. 35 is a diagram illustrating magnetic fluxes generated when a current flows in one direction through the movable contact according to embodiment 1.

Fig. 36 is a diagram illustrating magnetic fluxes generated when a current flows in the other direction through the movable contact according to embodiment 1.

Fig. 37 is a diagram showing the fixed contact portion, the movable contact, and the yoke according to embodiment 1, and is a plan view showing a state where the contact is at the 1 st position.

Fig. 38 is a diagram showing the fixed contact portion, the movable contact, and the yoke according to embodiment 1, and is a plan view showing a state where the contact is at the 2 nd position.

Fig. 39 is a diagram illustrating a state in which an arc moves toward a protruding portion in the electromagnetic relay according to embodiment 1.

Fig. 40 is a diagram illustrating a state where an arc moves toward a projection in the electromagnetic relay according to modification 1.

Fig. 41 is a perspective view of the movable contact according to modification 2 as viewed obliquely from the 1 st upward direction before the yoke is attached to the movable contact.

Fig. 42 is a perspective view of the movable contact of modification 2 as viewed obliquely from the 2 nd upward direction before the yoke is attached to the movable contact.

Fig. 43 is a side view showing a state before the yoke is attached to the movable contact of modification 2.

Fig. 44 is a reverse view showing a state in which a yoke is attached to the movable contact of the modification 2.

Fig. 45 is a front view showing a state where a yoke is attached to the movable contact of modification 2.

Fig. 46 is a rear view showing a state in which a yoke is attached to the movable contact of modification 2.

Fig. 47 is a side view showing a state in which a yoke is attached to the movable contact of modification 2.

Fig. 48 is a perspective view of the movable contact according to modification 2 in which a yoke is attached, as viewed obliquely from below.

Fig. 49 is a side view showing a contact portion according to modification 2.

Fig. 50 is a perspective view of the movable contact according to modification 3 as viewed obliquely from the 1 st upward direction before the yoke is attached to the movable contact.

Fig. 51 is a perspective view of the movable contact according to modification 3, as viewed obliquely from the 2 nd upward direction, before the yoke is attached to the movable contact.

Fig. 52 is a side view showing a state before a yoke is attached to a movable contact according to modification 3.

Fig. 53 is a reverse view showing a state where a yoke is attached to the movable contact of the modification 3.

Fig. 54 is a front view showing a state in which a yoke is attached to the movable contact of modification 3.

Fig. 55 is a rear view showing a state where a yoke is attached to the movable contact of modification 3.

Fig. 56 is a side view showing a state in which a yoke is attached to the movable contact of modification 3.

Fig. 57 is a side view showing a contact portion according to modification 3.

Fig. 58 is a diagram showing the electromagnetic relay according to embodiment 2, and is an exploded perspective view of the electromagnetic relay in which the cover is removed as viewed obliquely from above at 2 nd position.

Fig. 59 is a partially broken cross-sectional view showing an electromagnetic relay according to embodiment 2.

Description of the reference numerals

1. An electromagnetic relay; 20. an electromagnet arrangement; 210. a coil; 411. a fixed contact; 411A, 1 st fixed contact; 411B, no. 2 fixed contact; 411b, a protrusion; 412. a main body portion; 412A, 1 st fixed contact side terminal; 412B, 2 nd fixed contact side terminal; 4121. front (opposite) face; 4122. a back surface (disposition surface); 421. a movable contact; 421A, 1 st movable contact; 421B, 2 nd movable contact; 4211. a 2 nd contact member (contact member); 422. a movable contact (the other main body portion); 422a, a through hole (through hole); 422b, a protrusion; 422c, a notch portion; 4221. front (opposite) face; 4222. a back surface (disposition surface); 4222a, a recess; 4223. side surfaces (upper surfaces); 4224. a side surface (lower surface); 4225. an end portion; 4226. a movable side protrusion (protrusion); 53. a movable spring (connecting member); 80. a magnetic yoke; 80b, through holes (openings); 81ba, a contact portion; 82. a ceiling wall (arm portion); 83. a bottom wall (arm: 3 rd arm); 840. a1 st magnetic yoke; 841. a1 st arm part; 850. a 2 nd magnetic yoke; 851. a 2 nd arm part; 860. a connecting portion; 90. a fixed part; d1, the shortest distance between the 1 st and 2 nd body portions; d2, the shortest distance between the yoke and another body part independent of the body part on which the yoke is arranged; I. current flow; r1, a specific region; x, front and rear axis; y, a wide axis; z, upper and lower axes.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Hereinafter, the up-down axis, the front-rear axis, and the wide axis of the electromagnetic relay 1 are defined in a state where the lead-out terminal 414 is led out from the case 10 to the lower side of the up-down axis. The up-down axis, the front-rear axis, and the wide axis are appropriately defined only for explaining the respective configurations, and do not define the actual arrangement state of the electromagnetic relay 1. Note that the vertical axis, the front-rear axis, and the wide axis are imaginary structures, and do not indicate that the electromagnetic relay 1 actually has shaft portions such as the vertical axis.

Also, the direction in which the fixed contact and the movable contact oppose each other is described using any of "X axis", "front-rear axis", and "direction extending along the X axis".

In embodiment 1, the direction in which the pair of fixed contacts are arranged will be described using any of the "Y axis", "wide axis", "longitudinal direction of the movable contact", and "direction extending along the Y axis". Further, the axis intersecting the X axis and the Y axis is described using "Z axis". In embodiment 2, the "Z axis" is described using either the "upper and lower axes", and an axis intersecting the X axis and the Z axis is described as the Y axis.

In the present embodiment, an axis extending along the Z axis in the three-dimensional rectangular coordinate is a vertical axis, an axis extending along the X axis is a front-rear axis, and an axis extending along the Y axis is a wide axis. That is, an axis orthogonal to the front-rear axis is a wide axis, and an axis orthogonal to the front-rear axis and the wide axis is an up-down axis.

The lower side of the vertical axis is defined as the 1 st end side of the Z axis, and the upper side is defined as the 2 nd end side of the Z axis. The side where the fixed contacts are arranged is defined as the front side on the front-rear axis, and the side where the movable contacts are arranged is defined as the rear side on the front-rear axis.

Note that the following embodiments and modifications thereof include the same components. Therefore, in the following, common reference numerals are given to these similar components, and redundant description is omitted.

In addition, although the present disclosure is sometimes described using terms indicating directions such as "upper", "lower", "left", "right", "front", "rear", etc., these terms merely indicate relative positional relationships, and the present disclosure is not limited thereby. For example, when the electromagnetic relay 1 of the present disclosure is provided to be rotatable, the direction of the electromagnetic relay 1 in a state of being actually used may be different from the direction of the electromagnetic relay 1 described in the present disclosure.

(embodiment 1)

As shown in fig. 1 and 2, an electromagnetic relay 1 according to the present embodiment includes a case 10 formed of a resin material into a hollow box shape. In the present embodiment, the casing 10 has a base 110 and a housing 120 covering the base 110, and has a substantially rectangular parallelepiped outer surface. In a state where the housing 120 is attached to the base 110, an internal space S1 is formed in the casing 10 (see fig. 14 and 15). The shape of the outer surface of the housing 10 is not limited to a rectangular parallelepiped shape, and may be any shape.

An electromagnet device (drive unit) 20 is disposed rearward on the front-rear axis in the internal space S1 of the housing 10, and a contact point unit 40 is disposed forward on the front-rear axis. The auxiliary contact 60 is disposed rearward of the front-rear axis and above the up-down axis (on the 2 nd end side) in the internal space S1 of the housing 10.

Here, in the present embodiment, the contact portion 40 is a so-called normally open type contact portion in which the contacts are open in the initial state, and the auxiliary contact portion 60 is a so-called normally closed type contact portion in which the contacts are closed in the initial state. The contact portion 40 may be a so-called normally closed contact portion in which the contacts are closed in the initial state, and the auxiliary contact portion 60 may be a so-called normally open contact portion in which the contacts are opened in the initial state.

The base 110 includes a base portion 111 having a substantially rectangular plate shape extending along a substantially horizontal plane (a plane intersecting the Z axis: XY plane), and a peripheral wall 112 provided continuously with a peripheral edge of the base portion 111 and extending along the vertical axis (see fig. 3 to 7).

A stepped portion is formed on the opening periphery of the peripheral wall 112 on the upper end side, and the outer periphery is smaller than that on the lower end side. A pair of projections 112a are provided in a row along the wide axis (direction extending in the left-right direction) on the upper portions of the front and rear surfaces of the peripheral wall 112 with respect to the step portions.

On the other hand, the housing 120 has a substantially box shape that opens downward, and the housing 120 is attached to the base 110 from above.

The housing 120 includes a top wall 121 having a substantially rectangular plate shape extending along a substantially horizontal plane (a plane intersecting the Z axis: XY plane), and a peripheral wall 122 extending from the periphery of the top wall 121 to the lower side (1 st end) of the vertical axis (see fig. 3 to 5).

The peripheral wall 122 includes a front wall 1221 located forward of the front-rear axis and extending along the wide axis and the up-down axis. Further, the peripheral wall 122 includes a rear wall 1222 located rearward of the front-rear axis and extending along the wide axis and the up-down axis. Further, the peripheral wall 122 includes a pair of side walls 1223 provided continuously with the front wall 1221 and the rear wall 1222 on both sides of the wide axis and extending along the front-rear axis and the up-down axis.

A pair of through holes 122a into which the projections 112a of the base 110 are inserted when the housing 120 is attached to the base 110 are provided in a line along the wide axis (direction extending in the left-right direction) in the lower portions of the front wall 1221 and the rear wall 1222.

In the present embodiment, the base 110 includes the 1 st side wall 131 that is continuously provided so as to rise upward from the bottom surface 111a of the base portion 111 and extends along the wide axis. The base 110 includes a pair of 2 nd side walls 132 continuously provided from both ends of the width axis of the 1 st side wall 131 toward the rear of the front-rear axis. The pair of 2 nd side walls 132 also extend to rise upward from the bottom surface 111a of the base portion 111. The yoke 240 of the electromagnet device 20 is held by the 1 st side wall 131 and the pair of 2 nd side walls 132 extending upward from the bottom surface 111a of the base portion 111, and surrounds the side surfaces 210a of the coil 210 in three directions (at least partially).

As described above, in the present embodiment, the electromagnet device 20 is disposed rearward of the 1 st side wall 131. Further, the contact portion 40 is disposed forward of the 1 st side wall 131 (see fig. 2 to 4). That is, in the present embodiment, the electromagnet device 20 and the contact portion 40 are arranged in the internal space S1 in a state of being partitioned back and forth by the 1 st side wall 131.

Further, a protruding wall 113 is formed at a position forward of the 1 st side wall 131 of the base 110, and a creeping distance between a pair of fixed contact portions 410, 410 described later is secured by this protruding wall 113.

Further, a step-up member 114 for providing a gap between the base 110 and a printed board when the electromagnetic relay 1 is disposed on the printed board, not shown, is formed on the base 110.

The electromagnet device (driving unit) 20 generates an electromagnetic force, and includes a coil 210 that generates a magnetic flux by energization, and a hollow cylindrical bobbin 220 around which the coil 210 is wound (see fig. 8).

As the coil 210, for example, a wire can be used. In the present embodiment, the coil 210 is disposed in the internal space S1 of the housing 10 so as to extend axially along the vertical axis with the base 110 positioned below the housing 120.

The bobbin 220 is made of resin as an insulating material, and a cylindrical portion 221 extending along the vertical axis (Z axis: 3 rd axis: axial direction of the coil) is formed at the center of the bobbin 220. A through hole 2211 penetrating vertically is formed inside the cylindrical portion 221.

The bobbin 220 includes a substantially rectangular upper flange portion (upper flange portion) 222 that is provided continuously with the upper end of the cylindrical portion 221 and protrudes outward in the radial direction of the cylindrical portion 221, and the coil 210 is wound around the outer surface of the cylindrical portion 221. The bobbin 220 includes a substantially rectangular lower flange portion (lower flange portion) 223 that is provided continuously with the lower end of the cylindrical portion 221 and protrudes outward in the radial direction of the cylindrical portion 221.

In the present embodiment, the upper auxiliary contact holding portion 2221 for holding the auxiliary contact portion 60 is formed in the upper flange portion 222. The upper auxiliary contact holding portions 2221 are formed at both ends of the wide shaft at the rear end of the front and rear shafts of the upper flange portion 222. Further, each of the upper auxiliary contact holding portions 2221 is formed with a press-fitting opening 2221a (see fig. 6 to 8) that opens outward of the wide axis and into which a press-fitting piece 6141a, 6241a of the auxiliary contact portion 60, which will be described later, is press-fitted. A regulating wall 2221b (see fig. 6 to 8) for regulating the separation and rotation of the press-fitting pieces 6141a and 6241a is formed around the press-fitting opening 2221a of the upper auxiliary contact holding portion 2221.

On the other hand, a lower auxiliary contact holder 2231 for holding the auxiliary contact 60 is formed on the lower flange 223. In the present embodiment, the lower flange portion 223 is formed to be wider at the rear end side than at the front end side of the front-rear shaft, and the lower auxiliary contact holding portions 2231 are formed at both ends of the wide shaft at the front end side of the wide portion. Further, each lower auxiliary contact holder 2231 has a press-fit opening 2231a that opens outward in the wide axis and into which press- fit pieces 6143a and 6243a (described later) of the auxiliary contact 60 are press-fitted (see fig. 6 to 8). A regulating wall 2231b for regulating the separation and rotation of the press-fitting pieces 6143a and 6243a is formed around the press-fitting opening 2231a of the lower auxiliary contact holder 2231 (see fig. 6 to 8).

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

The core 230 includes a substantially cylindrical shaft portion 231 extending along the vertical axis and a substantially cylindrical head portion 232 formed to have a larger diameter than the shaft portion 231 and provided continuously with an upper end of the shaft portion 231 (see fig. 8).

The electromagnet device 20 includes a yoke 240 disposed around the coil 210 wound around the cylindrical portion 221. The yoke 240 is a substantially plate-shaped member formed of a magnetic material in the present embodiment, and has a substantially L-shape in side view (as viewed along the Y axis). That is, the yoke 240 includes a vertical wall portion (standing portion) 241 arranged in front of the coil 210 wound around the cylindrical portion 221 so as to extend along a substantially vertical plane, and a horizontal wall portion 242 extending rearward from a lower end of the vertical wall portion 241 (see fig. 8). Such a yoke 240 can be formed by bending a plate, for example.

As described above, the yoke 240 is supported by the 1 st side wall 131 and the pair of 2 nd side walls 132 extending upward from the bottom surface 111a of the base portion 111 (see fig. 3 and 4). A pair of projecting portions (extending portions) 2411 projecting upward are formed at both ends of the wide axis of the vertical wall portion (standing portion) 241 of the yoke 240, and the armature 310 is disposed between the pair of projecting portions (extending portions) 2411.

The electromagnet device 20 includes a pair of coil terminals 250 to which both ends of the coil 210 are connected, and the electromagnet device 20 is driven by energizing the coil 210 through the pair of coil terminals 250. In the present embodiment, the coil terminal 250 is fixed to the bobbin 220 in a state where the tip end (connection piece) 251 protrudes downward (outward: 1 st end side) of the vertical axis from the case 10. Specifically, the coil terminals 250 are held in the pair of coil terminal holding grooves 223a formed in the pair of extending portions 2232, respectively (see fig. 8).

Also, the moving member 30 is moved by switching the driving state of the electromagnet device 20.

In the present embodiment, the moving member 30 includes an armature 310 disposed to face the head 232 of the iron core 230 along the upper and lower axes, and a hinge spring 320 mounted across the armature 310 and the yoke 240.

The armature 310 is made of a conductive metal and is disposed so as to be swingable along the vertical axis with respect to the head 232 of the core 230 in accordance with the excitation and non-excitation of the coil 210.

In the present embodiment, the armature 310 includes a horizontal wall portion 311 that faces the head portion 232 of the core 230 along the vertical axis, and a vertical wall portion 312 that extends downward from the front end of the front-rear axis of the horizontal wall portion 311 (see fig. 9 and 10).

The horizontal wall portion 311 of the armature 310 is attached to the upper end of the vertical wall portion 241 of the yoke 240 so as to be swingable along the vertical axis, and the armature 310 is rotatable along the vertical axis about a portion supported by the yoke 240.

Specifically, notches 3111 are formed at both ends of the wide axis at the front end of the front-rear axis of the horizontal wall portion 311 of the armature 310. Then, the armature 310 is supported by the yoke 240 by inserting a protrusion (extended portion) 2411 of the yoke 240 into the notch 3111. As described above, in the present embodiment, the notch 3111 is a portion of the armature 310 supported by the yoke 240.

In the present embodiment, a through hole 313 that penetrates vertically is formed at the front end of the front and rear shafts of the armature 310. The hinge spring 320 is inserted into the through hole 313 and is mounted across the armature 310 and the yoke 240. At this time, the armature 310 is biased by the hinge spring 320 in a direction in which the horizontal wall portion 311 is separated from the head portion 232 of the core 230.

When the coil 210 is energized, the armature 310 is rotated so that the horizontal wall portion 311 approaches the head portion 232 of the core 230. Specifically, when the coil 210 is energized, the horizontal wall portion 311 of the armature 310 is attracted to the head portion 232 of the core 230, and the armature 310 is rotated so that the horizontal wall portion 311 approaches the head portion 232 of the core 230. That is, when the coil 210 is energized through the pair of coil terminals 250, the horizontal wall portion 311 of the armature 310 rotates downward in the vertical axis direction. At this time, the vertical wall portion 312 provided continuously with the horizontal wall portion 311 rotates forward of the front-rear axis.

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

In the present embodiment, the swing range of the armature 310 is set between an initial position where the horizontal wall portion 311 is disposed upward from the head portion 232 of the core 230 with a predetermined gap and an abutment position where the horizontal wall portion 311 abuts against the head portion 232 of the core 230.

Therefore, in the present embodiment, when the coil 210 is energized, the armature 310 moves to the contact position where the horizontal wall portion 311 contacts the head portion 232 of the core 230, and when the energization of the coil 210 is stopped, the armature 310 returns to the initial position by the urging force of the hinge spring 320.

As described above, the armature 310 of the present embodiment is disposed to face the head 232 of the core 230 with a predetermined gap therebetween when the coil 210 is not energized, and swings so as to be attracted toward the head 232 of the core 230 when the coil 210 is energized.

By switching the driving state of the electromagnet device 20 and swinging the armature 310, conduction and non-conduction between the fixed contact portion 410 and the movable contact portion 420 that are paired with each other (have contacts that are in contact with and separated from each other) can be switched.

In the present embodiment, a contact portion 40 that opens and closes a contact in accordance with the on/off of the energization of the coil 210 is provided in front of the electromagnet device 20.

The contact portion 40 includes a fixed contact portion 410 and a movable contact portion 420, and the fixed contact portion 410 includes a fixed contact 411 and a main body portion 412 having the fixed contact 411. On the other hand, the movable contact portion 420 includes a movable contact 421, and the movable contact 421 is opposed to the fixed contact 411 along the 1 st axis, relatively moves with respect to the fixed contact 411, and can be brought into contact with and separated from the fixed contact 411. Further, the movable contact portion 420 includes a movable contact 422 having a movable contact 421.

In the present disclosure, the body 412 may be referred to as a "body" and the movable contact may be referred to as another "body".

In the present embodiment, the contact portion 40 includes only one set of the fixed contact portion 410 and the movable contact portion 420 that are paired with each other (see fig. 6 and 7).

In the present embodiment, a set of the fixed contact portion 410 and the movable contact portion 420 having contacts that are in contact with and separated from each other is composed of a pair of the fixed contact portion 410 and one movable contact portion 420.

Specifically, two fixed contact portions 410 having a shape symmetrical to the XZ plane are defined as a pair of fixed contact portions 410. Further, the pair of two fixed contact portions 410 are fixed to the base 110 (housing 10) in a state of being separated on the wide axis.

Here, in the present embodiment, each fixed contact portion 410 includes a main body portion 412 having one fixed contact 411 (see fig. 6 and 7). Then, by fixing the pair of two fixed contact portions 410 to the base 110 (housing 10), the pair of fixed contacts 411 are arranged so as to be aligned along the wide axis.

In this way, in the present embodiment, the fixed contact 411 has the 1 st fixed contact 411A and the 2 nd fixed contact 411B. The main body (1 st main body) 412 has a1 st fixed contact side terminal 412A and a 2 nd fixed contact side terminal 412B, the 1 st fixed contact side terminal 412A having a1 st fixed contact 411A, and the 2 nd fixed contact side terminal 412B having a 2 nd fixed contact 411B.

In the present embodiment, for convenience, the body portion (1 st body portion) 412 located on the right side in fig. 6 is referred to as a1 st fixed contact side terminal 412A having a1 st fixed contact 411A. That is, the 1 st fixed contact side terminal 412A having the 1 st fixed contact 411A may be a main body portion (1 st main body portion) 412 located on the left side in fig. 6.

In the present embodiment, a predetermined member (the 1 st contact member 4111) to be a fixed contact is inserted into a through hole 412a formed in the body portion 412 so as to penetrate in the plate thickness direction, and caulking is performed, so that the body portion 412 has the fixed contact 411 (see fig. 14 and 15). As described above, in the present embodiment, the main body 412 of the fixed contact portion 410 functions as a fixed-side contact holder for holding the fixed contact 411.

The formation of the fixed contact 411 in the body 412 of the fixed contact portion 410 is not necessarily performed by caulking, and may be performed by various methods. For example, a portion protruding by pin processing of the body portion 412 may function as a fixed contact. Further, by configuring such that movable contact 421 comes into contact with a part of the flat surface of main body portion 412, the part of the flat surface of main body portion 412 can function as a fixed contact.

Fixed contact portion 410 is provided with lead-out terminal 414 which is led out to the lower side (outside) of base 110 (case 10) when fixed contact portion 410 is fixed to base 110 (case 10). The fixed contact portion 410 includes a terminal connection portion 413 connected to the lead terminal 414 below the vertical axis (1 st end side) of the fixed contact 411. Fixed contact 410 is fixed to base 110 (case 10) in a state in which the tip (connection portion) of lead terminal 414 protrudes below (outward of) base 110 (case 10).

In the present embodiment, a through hole 115 penetrating vertically is formed in the base 110. The tip (lower end of the connection portion) of the lead terminal 414 is inserted into the through hole 115 from above. Further, the base 110 has an inner press-fitting groove 116 and an outer press-fitting groove 117, and the fixed contact portion 410 is press-fitted into the inner press-fitting groove 116 and the outer press-fitting groove 117. In this way, fixed contact portion 410 is fixed to base 110 (housing 10) with the tip (connecting portion: lower end) of lead terminal 414 projecting below (outward) of base 110 (see fig. 14 and 15). Fixed contact 410 may be fixed to base 110 (housing 10) with an adhesive or the like.

At this time, the fixed contact portion 410 is fixed to the base 110 (housing 10) in a state where the fixed contact 411 is directed rearward of the front-rear axis. That is, the fixed contact portion 410 is fixed to the base 110 (housing 10) in a state where a surface 410a of the main body portion 412 on which the fixed contact 411 is formed (front surface: opposing surface: surface on the side opposing the movable contact portion 420) faces rearward.

The fixed contact 411, the body portion 412, the terminal connection portion 413, and the lead terminal 414 can be formed of a conductive material such as a silver-based material or a copper-based material.

As described above, in the present embodiment, the two fixed contacts 411 are arranged in line along the Y axis, which is a direction orthogonal (intersecting) to the direction in which the fixed contacts 411 and the movable contact 421 move relative to each other. Further, one main body portion (1 st fixed contact side terminal 412A) of the two main body portions 412 has one fixed contact (1 st fixed contact 411A) 411. Further, the other main body portion (the 2 nd fixed contact side terminal 412B) has another fixed contact (the 2 nd fixed contact 411B) 411.

On the other hand, one movable contact portion 420 includes one movable contact (2 nd body portion) 422, and the one movable contact 422 includes a pair of movable contacts (2 nd contacts) 421 (see fig. 9 and 10) arranged along the wide axis.

As described above, in the present embodiment, the 2 nd body portion is the movable contact 422, and the movable contact 421 provided on the movable contact 422 includes the 1 st movable contact 421A and the 2 nd movable contact 421B arranged in line along the 2 nd axis. That is, the movable contact 421 has a1 st movable contact 421A brought into contact with and separated from the 1 st fixed contact 411A and a 2 nd movable contact 421B brought into contact with and separated from the 2 nd fixed contact 411B.

In the present embodiment, a predetermined member (the 2 nd contact member 4211) to be a movable contact is inserted into a through hole 422a formed on both sides in the longitudinal direction of the movable contact 422 having a substantially rectangular plate shape so as to penetrate in the plate thickness direction, and caulking is performed. Thus, the movable contact 422 has a movable contact 421 (see fig. 14 and 15). As described above, in the present embodiment, the movable contact 422 has a function as a movable-side contact holder that holds the movable contact 421.

The formation of the movable contact 421 on the movable contact 422 is not necessarily performed by caulking, and may be performed by various methods. For example, a portion protruding by pinning the movable contact 422 may function as a movable contact. Further, a part of the flat surface of the movable contact 422 may be configured to contact the fixed contact 411, so that the part of the flat surface of the movable contact 422 functions as a movable contact.

One movable contact portion 420 is disposed so as to be located behind the pair of two fixed contact portions 410 in the front-rear direction with the plate thickness direction substantially aligned with the front-rear direction and the longitudinal direction substantially aligned with the width direction. At this time, the movable contact portion 420 is disposed in a state where the movable contact 421 and the fixed contact 411 are axially opposed to each other in the front-rear direction. Specifically, the movable contact 422 is disposed such that the movable contact 421 formed on the 1 st end side of the wide axis and the fixed contact 411 of the fixed contact portion 410 disposed on the 1 st end side of the wide axis face each other along the front-rear axis. Similarly, the movable contact 422 is disposed such that the movable contact 421 formed on the 2 nd end side of the wide axis and the fixed contact 411 of the fixed contact portion 410 disposed on the 2 nd end side of the wide axis face each other along the front-rear axis.

Thus, one movable contact (1 st movable contact 421A) 421 is brought into contact with and separated from one fixed contact (1 st fixed contact 411A) 411 of the two fixed contacts 411. The other movable contact (2 nd movable contact 421B) 421 is separated from and brought into contact with the other fixed contact (2 nd fixed contact 411B) 411. Further, one movable contact 422 has two movable contact points 421.

In the present embodiment, for convenience, the movable contact (1 st movable contact 421A) 421 located on the left side in fig. 7 is referred to as the 1 st movable contact 421A that is in contact with and separated from the 1 st fixed contact 411A. That is, the 1 st movable contact 421A that is in contact with and separated from the 1 st fixed contact 411A may be the movable contact 421 located on the right side in fig. 7.

The movable contact 421 and the movable contact 422 may be formed of a conductive material such as a silver-based material or a copper-based material.

The set of the pair of fixed contact portions 410 and the single movable contact portion 420 having such a configuration is housed in the internal space S1 at a position forward of the front-rear axis with respect to the 1 st side wall 131 (see fig. 12 to 15).

Here, the movable contact portion 420 is arranged to be relatively swingable along the front-rear axis with respect to the pair of fixed contact portions 410.

In the present embodiment, the contact portion 40 is provided continuously with the armature 310 via the movable portion 50. Then, by swinging the movable portion 50 along the front-rear axis in accordance with the swinging of the armature 310, the movable contact portion 420 swings along the front-rear axis in conjunction with the operation of the movable portion 50. That is, by holding the movable contact portion 420 to the movable portion 50, the movable contact portion 420 swings relative to the pair of fixed contact portions 410 along the front-rear axis.

In the present embodiment, the movable portion 50 includes a holding portion 51, and the holding portion 51 is formed of an insulating resin material, and a through hole 511 into which the vertical wall portion 312 of the armature 310 is inserted and held is formed in the upper portion. The movable portion 50 includes a movable plate 52 provided continuously to a lower portion of the holding portion 51, and a movable spring (connecting member) 53 connecting the movable plate 52 and the movable contact 422.

In the present embodiment, a through hole 521 penetrating in the plate thickness direction is formed in the upper portion of the upper and lower axes of the movable plate 52. Then, in a state where the upper end of the movable plate 52 is inserted into the through hole, not shown, formed in the lower end of the holding portion 51, the protrusion formed in the through hole, not shown, of the holding portion 51 is inserted into the through hole 521, whereby the movable plate 52 is held by the holding portion 51.

Further, a protrusion 522 protruding rearward is formed at the center of the upper and lower axes of the movable plate 52, and an upper through hole 531 penetrating in the plate thickness direction is formed at the upper portion of the upper and lower axes of the movable spring 53. Then, the movable spring 53 is held by the movable plate 52 by inserting the protrusion 522 of the movable plate 52 into the upper through hole 531 of the movable spring 53.

A lower through hole 532 penetrating in the plate thickness direction is formed in the lower portion of the upper and lower axes of the movable spring 53, and a protrusion 422b protruding rearward is formed in the center portion of the wide axis of the movable contact 422. Further, notch portions 422c are formed on both sides of the upper and lower axes in the center portion of the wide axis of the movable contact 422. Then, the movable contact 422 is held by the movable spring 53 by inserting the protrusion 422b of the movable contact 422 into the lower through hole 532 of the movable spring 53.

Thus, the contact portion 40 is provided continuously with the armature 310 via the movable portion 50.

With such a configuration, the movable contact portion 420 swings relative to the pair of fixed contact portions 410 along the front-rear axis in accordance with the swing of the armature 310. Therefore, movable contact 421 swings so as to draw an arc centered on the upper end of vertical wall 312.

In the present embodiment, the auxiliary contact portion 60 is disposed in addition to the contact portion 40 in the internal space S1 of the housing 10. The auxiliary contact unit 60 is disposed in the internal space S1 in a state where auxiliary contacts (an auxiliary fixed contact 611 and an auxiliary movable contact 621) are present at positions that are rearward of the front-rear axis and that are on the upper end side of the coil 210. Specifically, the auxiliary fixed contact 611 and the auxiliary movable contact 621 of the auxiliary contact portion 60 are disposed on the 2 nd end side (rear side) of the front-rear axis with respect to the axis of the coil 210, and are disposed on the upper end side (2 nd end side) of the coil 210 in the axial direction in a state where the coil 210 is disposed so as to extend in the axial direction along the vertical axis and the tip (connection piece) 251 of the coil terminal 250 is located on the lower side (1 st end side) with respect to the coil 210.

The auxiliary contact portion 60 includes an auxiliary fixed contact portion 610 and an auxiliary movable contact portion 620, and the auxiliary fixed contact portion 610 includes an auxiliary fixed contact 611 and a1 st auxiliary contact terminal 612 having the auxiliary fixed contact 611. On the other hand, the auxiliary movable contact point portion 620 includes an auxiliary movable contact point 621 that moves relative to the auxiliary fixed contact point 611 and is capable of contacting and separating with the auxiliary fixed contact point 611, and a 2 nd auxiliary contact point terminal 622 having the auxiliary movable contact point 621.

In the present embodiment, the auxiliary contact portion 60 includes only one set of the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 that are paired with each other (have auxiliary contacts that are in contact with and separated from each other) (see fig. 6 and 7).

In the present embodiment, the set of the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 having the auxiliary contacts that are in contact with and separated from each other is composed of one auxiliary fixed contact portion 610 and one auxiliary movable contact portion 620. One auxiliary fixed contact 611 is formed in one auxiliary fixed contact part 610, and only one auxiliary movable contact 621 that is in contact with and separated from one auxiliary fixed contact 611 is formed in one auxiliary movable contact part 620.

In the present embodiment, as described above, the auxiliary fixed contact part 610 includes the 1 st auxiliary contact terminal 612 having one auxiliary fixed contact 611.

The 1 st auxiliary contact terminal 612 includes an upper piece 613 extending along the width axis on the upper end side of the coil 210. An auxiliary fixed contact 611 is formed on the upper piece 613. In the present embodiment, the upper piece 613 has the auxiliary fixed contact 611 by inserting a predetermined member to be the auxiliary fixed contact into the through hole 613a formed in the upper piece 613 so as to penetrate in the plate thickness direction and performing caulking (see fig. 11). As described above, in the present embodiment, the upper piece 613 functions as a fixed-side auxiliary contact holder for holding the auxiliary fixed contacts 611.

The auxiliary fixed contact 611 is not necessarily formed on the upper piece 613 by caulking, and may be formed by various methods. For example, a portion protruding by pin processing of the upper piece 613 may function as an auxiliary fixed contact. Further, the auxiliary movable contact 621 is configured to be in contact with a part of the flat surface of the upper piece 613, so that the part of the flat surface of the upper piece 613 functions as an auxiliary fixed contact. Further, a plurality of auxiliary fixed contacts 611 may be provided on the upper piece 613 (the 1 st auxiliary contact terminal 612).

The 1 st auxiliary contact terminal 612 includes a side piece 614, and the side piece 614 is provided continuously with the outer end of the upper piece 613 in the width axis, extends along the XZ plane, and is vertically elongated. In the present embodiment, the side piece 614 is connected to the upper piece 613 so as to extend from the upper piece 613 downward of the vertical axis, and is disposed on the side of the wide axis of the coil 210.

The 1 st auxiliary contact terminal 612 includes a connecting piece 615 extending to protrude downward from a lower end of the side piece 614. The connecting piece 615 is formed so as to protrude downward (outward) of the base 110 while holding the side piece 614 on the bobbin 220 arranged on the base 110.

The side piece 614 includes a1 st side piece 6141 provided continuously to the outer end of the upper piece 613 in the width axis direction, and a coupling portion 6142 extending from the lower end of the 1 st side piece 6141 to the front of the front-rear axis. The side piece 614 includes a 2 nd side piece 6143 extending downward from the lower end of the coupling portion 6142 to the vertical axis. The connecting piece 615 is connected to the lower end of the 2 nd side piece 6143 so as to protrude downward (outward) from the housing 10. In the present embodiment, the tip 6151 of the connecting piece 615 is positioned below the coil 210 in the vertical axis (1 st end side).

In this way, in the present embodiment, the side piece 614 includes the 1 st side piece 6141 coupled to the upper piece 613, the 2 nd side piece 6143 coupled to the connecting piece 615 and disposed at a position shifted forward in the front-rear axis with respect to the 1 st side piece 6141, and the coupling portion 6142 coupling the 1 st side piece 6141 and the 2 nd side piece 6143, and is bent into a crank-like shape as viewed along the width axis.

In the present embodiment, the auxiliary fixed contact portion 610 is held by the bobbin 220.

Specifically, the 1 st side piece 6141 is provided with press-fitting pieces 6141a protruding inward of the wide axis at both ends of the front and rear axes. Then, the pair of press-fitting pieces 6141a are press-fitted into the pair of press-fitting openings 2221a of the upper auxiliary contact holding portion 2221 formed in the upper flange portion 222.

Further, a press-fitting piece 6143a protruding toward the inside of the wide shaft is provided at the lower end of the 2 nd side piece 6143 on the front end side of the front-rear shaft. Then, the press-fitting piece 6143a is press-fitted into the press-fitting opening 2231a of the lower auxiliary contact holder 2231 formed in the lower flange 223.

In this way, the pair of press-fitting pieces 6141a are press-fitted into the pair of press-fitting openings 2221a, and the press-fitting pieces 6143a are press-fitted into the press-fitting openings 2231a, whereby the auxiliary fixed contact portion 610 is held by the bobbin 220.

In the present embodiment, the auxiliary fixed contact portion 610 is held by the bobbin 220 in a state where the auxiliary fixed contact 611 faces downward of the vertical axis. That is, the auxiliary fixed contact part 610 is held by the bobbin 220 in a state in which the surface of the upper piece 613 on the side where the auxiliary fixed contact 611 is formed (lower surface: surface on the side facing the auxiliary movable contact 621) faces downward.

The auxiliary fixed contact 611 and the 1 st auxiliary contact terminal 612 can be formed of a conductive material such as a silver-based material or a copper-based material, for example.

On the other hand, as described above, the auxiliary movable contact point portion 620 includes the 2 nd auxiliary contact point terminal 622 having one auxiliary movable contact point 621.

The 2 nd auxiliary contact terminal 622 includes an upper piece 623 extending along the width axis on the upper end side of the coil 210. In addition, an auxiliary movable contact 621 is formed on the upper piece 623.

In the present embodiment, the upper piece 623 includes a body portion 6231 having a substantially rectangular plate shape and a leaf spring 6232 extending in the horizontal direction and elongated on a wide axis. Further, the plate spring 6232 has an auxiliary movable contact 621.

In the present embodiment, the plate spring 6232 is bent into a crank shape so that the tip (the end portion on the inside of the Y axis) is positioned downward. The plate spring 6232 has an auxiliary movable contact 621 (see fig. 11) by inserting a predetermined member to be an auxiliary movable contact into a through hole 6232a formed at the tip end of the plate spring 6232 so as to penetrate in the plate thickness direction and performing caulking. As described above, in the present embodiment, the plate spring 6232 has a function as a movable auxiliary contact holder for holding the auxiliary movable contact 621.

The auxiliary movable contact 621 formed in the plate spring 6232 may be formed by various methods, without being necessarily formed by caulking. For example, a portion protruding by pin-processing the plate spring 6232 can also function as the auxiliary movable contact. Further, the auxiliary movable contact 621 is configured to be in partial contact with the flat surface of the plate spring 6232, so that the partial flat surface of the plate spring 6232 can function as the auxiliary movable contact. Further, a plurality of auxiliary movable contacts 621 may be provided in the plate spring 6232 (upper piece 623: 2 nd auxiliary contact terminal 622).

Further, the body portion 6231 is provided continuously with the outer end portion of the wide shaft of the plate spring 6232. Specifically, a pair of through holes 6232b are formed in the outer end of the wide axis of the plate spring 6232 so as to be aligned along the front-rear axis. Further, a pair of projections 6231a are formed on the body portion 6231 so as to be aligned along the front-rear axis. Further, the plate spring 6232 is provided continuously with the body portion 6231 by caulking in a state where the pair of projections 6231a are inserted into the pair of through holes 6232b, respectively.

The 2 nd auxiliary contact terminal 622 includes a side piece 624, and the side piece 624 is provided continuously with an outer end of the width axis of the body portion 6231 (upper piece 623), extends along the XZ plane, and is elongated in the vertical direction. In the present embodiment, the side pieces 624 are coupled to the body portion 6231 (upper pieces 623) so as to extend downward from the body portion 6231 (upper pieces 623) in the vertical direction and are disposed on the side of the wide axis of the coil 210.

The 2 nd auxiliary contact terminal 622 includes a connecting piece 625 extending so as to protrude downward from the lower end of the side piece 624. The connecting piece 625 is formed to protrude downward (outward) of the base 110 while holding the side piece 624 on the bobbin 220 disposed on the base 110.

Further, the side piece 624 includes a1 st side piece 6241 provided continuously with the end portion on the outer side of the wide axis of the body portion 6231 (upper piece 623) and a linking portion 6242 provided extending from the lower end of the 1 st side piece 6241 toward the front of the front-rear axis. The side piece 624 includes a 2 nd side piece 6243 extending downward from the lower end of the coupling portion 6242 toward the lower side of the vertical axis. The connecting piece 625 is connected to the lower end of the 2 nd side piece 6243 so as to protrude downward (outward) from the case 10. In the present embodiment, the distal end 6251 of the connecting piece 625 is located below the coil 210 (on the 1 st end side) in the vertical axis.

As described above, in the present embodiment, the side pieces 624 include the 1 st side piece 6241 coupled to the body portion 6231 (the upper piece 623), the 2 nd side piece 6243 coupled to the connecting piece 625 and disposed at a position displaced in front of the front-rear axis with respect to the 1 st side piece 6241, and the coupling portion 6242 coupling the 1 st side piece 6241 and the 2 nd side piece 6243, and are bent into a crank-like shape as viewed along the wide axis.

In the present embodiment, the auxiliary movable contact portion 620 is held by the bobbin 220.

Specifically, press-fitting pieces 6241a protruding inward of the wide axis are provided at both ends of the front-rear axis of the 1 st side piece 6241. Then, the pair of press-fitting pieces 6241a are press-fitted into the pair of press-fitting openings 2221a of the upper auxiliary contact holding portion 2221 formed in the upper flange portion 222.

Further, a press-fitting piece 6243a protruding inward of the wide axis is provided at the lower end of the 2 nd side piece 6243 on the front end side of the front-rear axis. Then, the press-fitting piece 6243a is press-fitted into the press-fitting opening 2231a of the lower auxiliary contact holder 2231 formed in the lower flange 223.

In this way, the pair of press-fitting pieces 6241a are press-fitted into the pair of press-fitting openings 2221a, and the press-fitting pieces 6243a are press-fitted into the press-fitting openings 2231a, whereby the auxiliary movable contact portion 620 is held by the bobbin 220.

In the present embodiment, the auxiliary movable contact 620 is held by the bobbin 220 in a state where the auxiliary movable contact 621 faces upward of the vertical axis. That is, the auxiliary movable contact portion 620 is held by the bobbin 220 in a state where the surface of the plate spring 6232 on which the auxiliary movable contact 621 is formed (upper surface: surface on the side opposite to the auxiliary fixed contact 611) faces upward.

The auxiliary movable contact 621 and the No. 2 auxiliary contact terminal 622 can be formed of a conductive material such as a silver-based material or a copper-based material.

The set of the one auxiliary fixed contact portion 610 and the one auxiliary movable contact portion 620 having such a configuration is housed in the internal space S1 at a position rearward of the front-rear axis with respect to the 1 st side wall 131 and on the upper end side of the coil 210 (see fig. 12 to 15). The auxiliary fixed contact 611 and the auxiliary movable contact 621 are disposed above the head 232 of the iron core 230 in the vertical direction.

Here, the auxiliary movable contact portion 620 is disposed so that the plate spring 6232 can swing relative to the auxiliary fixed contact portion 610 along the vertical axis. In the present embodiment, the plate spring 6232 is swingable relative to the auxiliary fixed contact portion 610 along the vertical axis by the auxiliary driving portion 70. That is, by switching the driving state of the electromagnet device 20 and swinging the auxiliary driving unit 70, the conduction and non-conduction between the auxiliary fixed contact point portion 610 and the auxiliary movable contact point portion 620 which are paired with each other (have auxiliary contact points which are in contact with and separated from each other) can be switched.

In the present embodiment, the auxiliary driving unit 70 is formed of an insulating resin material and is held by the horizontal wall portion 311 of the armature 310. Then, the auxiliary driving portion 70 is swung along the vertical axis in accordance with the swing of the armature 310. Thus, the plate spring 6232 is swung along the vertical axis in accordance with the swing of the auxiliary driving portion 70 along the vertical axis.

The auxiliary drive unit 70 includes a main body 71 and a fixing portion 72 continuously provided to project from the main body 71 toward the outside of the wide axis and held by a horizontal wall portion 311 of the armature 310. The auxiliary drive unit 70 includes an upward pressing portion 73 that is provided continuously from the body 71 so as to protrude rearward of the front-rear axis and presses the plate spring 6232 upward.

In the present embodiment, the fixing portion 72 includes an arm portion 721 protruding outward of the wide axis and a hook portion 722 provided continuously from an end portion of the arm portion 721 outward of the wide axis toward the lower side (1 st end side) of the vertical axis.

Further, a held portion 3112 for holding the auxiliary drive portion 70 is formed at the rear of the front-rear axis of the horizontal wall portion 311 of the armature 310. Then, the pair of hook portions 722 is hooked on the held portion 3112, whereby the auxiliary driving portion 70 is held by the horizontal wall portion 311 of the armature 310.

In this way, in the present embodiment, the auxiliary driving portion 70 is swung in conjunction with the swing of the armature 310, thereby switching between conduction and non-conduction between the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 having the auxiliary contacts that are in contact with and separated from each other. That is, the contact portion 40 is brought into contact with and separated from one end portion of the armature 310, and the auxiliary contact portion 60 is brought into contact with and separated from the other end portion of the armature 310.

With such a configuration, the auxiliary movable contact portion 620 swings relative to the auxiliary fixed contact portion 610 along the vertical axis as the armature 310 swings. At this time, the auxiliary movable contact 621 swings so as to draw an arc centered on the outer end of the wide shaft of the plate spring 6232.

In the present embodiment, the plate spring 6232 is provided continuously with the 2 nd auxiliary contact terminal 622 held by the bobbin 220 in a state where the auxiliary movable contact 621 is separated from the auxiliary fixed contact 611 in a natural state. In a state where the energization of coil 210 is stopped, push-up portion 73 of auxiliary driving unit 70 is pushed up by contact with plate spring 6232, and auxiliary movable contact 621 comes into contact with auxiliary fixed contact 611.

On the other hand, in a state where the coil 210 is energized, the rear end side of the horizontal wall portion 311 of the armature 310 rotates downward, and the auxiliary driving portion 70 moves downward as the rear end side of the horizontal wall portion 311 rotates downward. When the auxiliary driving unit 70 moves downward, the plate spring 6232 moves downward by the elastic restoring force, and the auxiliary movable contact 621 is separated from the auxiliary fixed contact 611.

In addition, the auxiliary driving portion 70 may drive the plate spring 6232 by using another method. As another method for driving the plate spring 6232 by the auxiliary driving unit 70, for example, there are the following methods: when the auxiliary driving unit 70 is separated from the plate spring 6232, the auxiliary movable contact 621 comes into contact with the auxiliary fixed contact 611 by the elastic restoring force of the plate spring 6232 to be brought into a conductive state, and the auxiliary driving unit 70 presses the plate spring 6232 downward to separate the auxiliary movable contact 621 from the auxiliary fixed contact 611 to be brought into a non-conductive state.

In this way, in the present embodiment, the auxiliary contact portion 60 is provided in a manner opposite to the contact portion 40 in the closed state and the open state.

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

First, in a state where the coil 210 is not energized, the horizontal wall portion 311 of the armature 310 moves in a direction away from the head portion 232 of the core 230 by the elastic force of the hinge spring 320. At this time, since the vertical wall portion 312 of the armature 310 is positioned rearward of the front-rear axis, the movable portion 50 is also positioned rearward of the front-rear axis. That is, movable contact portion 420 held by movable portion 50 is separated from fixed contact portion 410, and movable contact 421 is separated from fixed contact 411 (see fig. 12 and 14).

On the other hand, since the auxiliary driving unit 70 also moves in the direction of separating from the head 232 of the core 230, the plate spring 6232 is pressed up by the pressing portion 73 of the auxiliary driving unit 70, and the auxiliary movable contact 621 comes into contact with the auxiliary fixed contact 611 (see fig. 12 and 14).

When the coil 210 is energized from the off state, the horizontal wall portion 311 of the armature 310 is attracted downward (toward the core 230) by the electromagnetic force, and moves toward the head 232 of the core 230 against the elastic force of the hinge spring 320. Then, the vertical wall portion 312 rotates forward in accordance with the downward rotation of the horizontal wall portion 311 (toward the core 230), and the movable portion 50 rotates forward in accordance with the forward rotation of the vertical wall portion 312. Thereby, the movable contact 422 held by the movable portion 50 rotates forward toward the fixed contact portion 410, and the movable contact 421 of the movable contact 422 comes into contact with the fixed contact 411 of the fixed contact portion 410. Thus, the pair of fixed contact portions 410 are electrically connected by the movable contact portion 420 (see fig. 13 and 15).

On the other hand, since the auxiliary driving unit 70 also moves in a direction to approach the head 232 of the core 230, the push-up portion 73 of the auxiliary driving unit 70 moves downward, and the auxiliary movable contact 621 is separated from the auxiliary fixed contact 611. Thus, the auxiliary fixed contact portion 610 and the auxiliary movable contact portion 620 are electrically disconnected (see fig. 13 and 15). (refer to fig. 12 and 14).

In this state, when the energization of the coil 210 is stopped, the horizontal wall portion 311 of the armature 310 is rotated upward (away from the iron core 230) by the biasing force of the hinge spring 320, and returns to the initial position. Further, the vertical wall portion 312 rotates rearward in accordance with the upward rotation of the horizontal wall portion 311, and the movable portion 50 rotates rearward in accordance with the rearward rotation of the vertical wall portion 312. Thereby, the movable contact 422 held by the movable portion 50 is rotated rearward so as to be separated from the fixed contact portion 410, and the movable contact 421 of the movable contact 422 is separated from the fixed contact 411 of the fixed contact portion 410. Thus, the electrical connection between the pair of fixed contact portions 410, 410 is released.

On the other hand, since the auxiliary driving unit 70 also moves in a direction away from the head 232 of the core 230, the plate spring 6232 is pushed up by the push-up portion 73 of the auxiliary driving unit 70 and returned to the initial position. As a result, the auxiliary movable contact 621 comes into contact with the auxiliary fixed contact 611, and the auxiliary fixed contact portion 610 is electrically connected to the auxiliary movable contact portion 620.

As described above, in the present embodiment, when the armature 310 is at the initial position, the movable contact 421 and the fixed contact 411 are separated from each other, and the auxiliary movable contact 621 and the auxiliary fixed contact 611 are in the 2 nd position (see fig. 12 and 14). On the other hand, when the armature 310 is at the contact position, the movable contact 421 contacts the fixed contact 411, and the auxiliary movable contact 621 and the auxiliary fixed contact 611 are at the 1 st position (see fig. 13 and 15).

Therefore, the pair of fixed contact portions 410 and 410 are insulated from each other while the coil 210 is not energized, and the pair of fixed contact portions 410 and 410 are electrically connected to each other while the coil 210 is energized. As described above, in the present embodiment, the movable contact 421 is configured to be reciprocally movable (rotatable) along the front-rear axis relative to the fixed contact 411 between the 1 st position and the 2 nd position.

On the other hand, the auxiliary fixed contact portions 610 and the auxiliary movable contact portions 620 are insulated while the coil 210 is not energized, and the auxiliary fixed contact portions 610 and the auxiliary movable contact portions 620 are conducted while the coil 210 is energized. In this way, in the present embodiment, the auxiliary movable contact 621 is configured to be capable of reciprocating (rotating) relative to the auxiliary fixed contact 611 along the vertical axis between the 1 st position and the 2 nd position.

When the movable contact 421 is located at the 1 st position where it contacts the fixed contact 411, the current I flows through the movable contact 422 mainly in the longitudinal direction (Y axis).

At this time, for example, as shown in fig. 35, when a current I flows from the left-side (near side in fig. 35) movable contact 421 to the right-side (far side in fig. 35) movable contact 421, a magnetic flux B is generated from above to below on a surface 4221 of the movable contact 422 on which the movable contact 421 is formed. The surface 4221 of the movable contact 422 on which the movable contact 421 is formed is a surface located on a side facing the fixed contact portion 410, and hereinafter, may be referred to as a front surface 4221 or a facing surface 4221.

When the energization of the coil 210 is stopped, the movable contact 421 starts to be separated from the fixed contact 411 (moved from the state of fig. 37 to the state of fig. 38).

When the opening is started, an arc a is generated between the movable contact 421 and the fixed contact 411 at the initial stage of the opening, and the current conduction state is continued by the arc a (see fig. 38).

At this time, when a current I flows from the right movable contact 421 to the left movable contact 421 in fig. 38 (when a current I flows in the same direction as in fig. 35), the current I from the movable contact 421 to the fixed contact 411 flows through the arc a generated in the left movable contact 421 and the fixed contact 411 in fig. 38.

On the other hand, a current I from the fixed contact 411 to the movable contact 421 flows through an arc a generated between the movable contact 421 and the fixed contact 411 on the right side in fig. 38.

As described above, magnetic flux B is generated from above toward below in the front 4221 side of the movable contact 422, that is, in the space where the arc a exists.

Therefore, a left-side (outside of the Y axis) lorentz force acts on the arc a generated between the movable contact 421 and the fixed contact 411 on the left side in fig. 38 by the current I from the movable contact 421 toward the fixed contact 411 and the magnetic flux B from above toward below.

As a result, the arc a generated in the movable contact 421 and the fixed contact 411 on the left side of fig. 38 is pulled to the left side (outside of the Y axis) of fig. 38.

Further, a right-side (outside of the Y axis) lorentz force acts on the arc a generated between the movable contact 421 and the fixed contact 411 on the right side in fig. 38 by the current I from the fixed contact 411 to the movable contact 421 and the magnetic flux B from the upper side to the lower side.

As a result, the arc a generated in the movable contact 421 and the fixed contact 411 on the right side in fig. 38 is pulled to the right side (outside of the Y axis) in fig. 38.

Then, the arc a generated in each of the movable contact 421 and the fixed contact 411 is drawn outward along the Y axis and disappears. Thus, the current between the fixed contact portion 410 and the movable contact portion 420 is interrupted.

Although not shown, when a current I flows from the left movable contact 421 to the right movable contact 421 in fig. 38 (when a current I flows in the same direction as in fig. 36), the current I from the fixed contact 411 to the movable contact 421 flows through an arc a generated between the left movable contact 421 and the fixed contact 411 in fig. 38.

Further, a current I from the movable contact 421 toward the fixed contact 411 flows through an arc a generated between the movable contact 421 and the fixed contact 411 on the right side in fig. 38.

In this case, as described above, the magnetic flux B directed upward from below is generated on the front surface 4221 side of the movable contact 422, that is, in the space where the arc a exists.

Therefore, the arc a generated between the movable contact 421 and the fixed contact 411 on the left side in fig. 38 acts with a lorentz force on the left side (outside of the Y axis) by the current I from the fixed contact 411 to the movable contact 421 and the magnetic flux B from the lower side to the upper side.

As a result, the arc a generated in the movable contact 421 and the fixed contact 411 on the left side of fig. 38 is pulled to the left side (outside of the Y axis) of fig. 38.

Further, the arc a generated between the movable contact 421 and the fixed contact 411 on the right side in fig. 38 acts on the lorentz force on the right side (outside of the Y axis) by the current I from the movable contact 421 toward the fixed contact 411 and the magnetic flux B from below toward above.

As a result, the arc a generated in the movable contact 421 and the fixed contact 411 on the right side in fig. 38 is pulled to the right side (outside of the Y axis) in fig. 38.

Then, the arc a generated in each of the movable contact 421 and the fixed contact 411 is pulled outward in the Y axis direction and disappears.

In this way, the electromagnetic relay 1 of the present embodiment is configured such that the arc a generated between the movable contact 421 and the fixed contact 411 is drawn outward in the Y axis and disappears regardless of the direction of the current.

Therefore, even when an alternating current flows through the contact portion 40 like an AC relay, the arc a generated between the movable contact 421 and the fixed contact 411 can be drawn outward in the Y axis direction and eliminated.

At this time, the arc generated between the movable contact 421 and the fixed contact 411 is stretched in the space formed between the 2 nd side wall 132 and the side wall 1223 of the housing 120. Therefore, in the present embodiment, the space formed between the 2 nd side wall 132 and the side wall 1223 of the housing 120 becomes the arc stretching space S4 (see fig. 5) for stretching the arc.

When the arc a generated between the movable contact 421 and the fixed contact 411 is pulled outward in the width direction, consumable powder and the like may be scattered into the arc extension space S4. At this time, if the space S2 in which the contact portion 40 is arranged and the space S3 in which the auxiliary contact portion 60 is arranged in the internal space S1 of the housing 10 communicate with each other through a large passage, the auxiliary contact portion 60 may be affected by the powder consumption or the like. In particular, in an electromagnetic relay through which a large current flows, the auxiliary contact portion 60 is greatly affected by powder consumption and the like.

Thus, in the present embodiment, even when the current flowing through the contact portion 40 is large, the contact reliability of the auxiliary contact portion 60 can be more reliably suppressed from being lowered. Specifically, the partition wall 130 is formed to divide the internal space S1 into a contact side space S2 where the contact portion 40 exists and an auxiliary contact side space S3 where the auxiliary contact portion 60 exists. That is, the contact side space S2 and the auxiliary contact side space S3 of the internal space S1 can be defined by the continuous portion of the partition wall 130.

By providing the partition wall 130, the contact side space S2 in which the contact portion 40 is arranged and the auxiliary contact side space S3 in which the auxiliary contact portion 60 is arranged can be communicated with each other through a narrower gap. That is, by providing the partition wall 130, the contact side space S2 and the auxiliary contact side space S3 are prevented from communicating with each other with a relatively wide gap as much as possible. In this way, it is possible to more reliably prevent the powder and the like generated in the contact portion 40 from entering the auxiliary contact side space S3 in which the auxiliary contact portion 60 is present.

In the present embodiment, the partition wall 130 includes the 1 st sidewall 131 continuously provided with the base 110 to extend along the up-down axis at the front side of the front-rear axis of the coil 210.

The partition wall 130 includes a pair of No. 2 side walls 132 disposed on both sides of the wide axis and extending along the vertical axis to be continuous with the base 110.

In this way, in the present embodiment, the 1 st side wall 131 and the pair of 2 nd side walls 132 for supporting the yoke 240 also function as the partition wall 130 that divides the contact side space S2 in which the contact portion 40 exists and the auxiliary contact side space S3 in which the auxiliary contact portion 60 exists.

The 1 st side wall 131 is provided continuously with the base 110 so that the contact portion 40 and the movable portion 50 are positioned on the front side of the front-rear axis and the auxiliary contact portion 60 and the coil 210 are positioned on the rear side of the front-rear axis.

Further, at least a part of the side surface 210a of the coil 210 is surrounded by the 1 st side wall 131 and the pair of 2 nd side walls 132.

In the present embodiment, the partition wall 130 includes a pair of 3 rd side walls 133, and the pair of 3 rd side walls 133 are arranged in line along the wide axis and are provided along the 2 nd side walls 132 along the vertical axis (see fig. 16 and 17).

In the present embodiment, the 3 rd side wall 133 is formed inside the housing 120. Specifically, the 3 rd side wall 133 extends from the inner surface of the top wall 121 along the front-rear axis and the up-down axis. The 3 rd side wall 133 is formed such that the rear end of the front/rear shaft contacts the inner surface of the rear wall 1222.

The pair of 3 rd side walls 133 is formed so as to overlap at least a part of the contact peripheral portion of the auxiliary contact portion 60 when viewed from the direction orthogonal to the Z axis. In this way, the arc extension space S4 and the auxiliary contact side space S3 of the contact side space S2 are divided by the 3 rd side wall 133. Further, the 3 rd side wall 133 can more reliably prevent the consumable powder and the like generated in the contact portion 40 from entering the auxiliary contact side space S3 through the arc extension space S4.

In the present embodiment, the contact-side space S2 has a substantially L-shaped space located above the contact portion 40 when viewed along the wide axis. This space becomes an armature disposition space S5 in which the armature 310 is disposed (see fig. 14 and 15). Further, since the armature 310 is disposed in the armature disposition space S5 in a state in which the swing is allowed, a relatively large gap is formed between the armature 310 and the housing 120 in the armature disposition space S5. Therefore, there is a possibility that the armature 310 may be displaced during the swing or that the powder or the like generated at the contact portion 40 may enter the auxiliary contact side space S3 through a relatively large gap formed between the armature 310 and the housing 120.

In the present embodiment, the partition wall 130 includes the 4 th side wall 134 provided in the housing 120 so as to protrude downward of the vertical axis in a state where the base 110 is positioned below the housing 120. The 4 th side wall 134 extends along the wide axis and is vertically opposed to the armature 310 (see fig. 14 and 15).

In the present embodiment, the 4 th side wall 134 has a pressing wall 1341, and the pressing wall 1341 is disposed in front of the front-rear axis (on the contact portion 40 side) with respect to the vertical wall portion (standing portion) 241 of the yoke 240 and can press the armature 310. Further, by providing the pressing wall 1341 to the housing 120, the armature 310 is prevented from being displaced when it swings. Further, since the armature disposition space S5 is divided into the front and rear by the pressing wall 1341, the pressing wall 1341 can more reliably prevent the powder or the like generated in the contact portion 40 from entering the auxiliary contact side space S3.

The 4 th side wall 134 has a partition wall 1342, and the partition wall 1342 is disposed behind the front-rear axis (on the auxiliary contact 60 side) with respect to the vertical wall portion (rising portion) 241 of the yoke 240, and can partition the space S5 above the armature 310. Further, by providing the partition wall 1342 in the housing 120, the partition wall 1342 can prevent the waste powder and the like that are not completely prevented by the pressing wall 1341 from entering the auxiliary contact side space S3.

In the present embodiment, the partition wall 130 has the 5 th sidewall 135, and the 5 th sidewall 135 extends along the vertical axis and is provided in the housing 120 so as to be disposed outside the 2 nd sidewall 132 in the wide axis (Y axis).

In the present embodiment, the 5 th side wall 135 extends to protrude downward from the top wall 121 of the housing 120 in the vertical axis direction. In a state where the housing 120 is attached to the base 110, the lower end of the 5 th side wall 135 is positioned at a middle portion between the base portion 111 of the base 110 and the top wall 121 of the housing 120.

The position of the lower end of the 5 th side wall 135 may be located between the base portion 111 of the base 110 and the top wall 121 of the housing 120, and the amount of protrusion of the 5 th side wall 135 from the top wall 121 may be appropriately set. Since the arc extension space S4 is divided into front and rear parts by providing the 5 th side wall 135 having such a shape, the 5 th side wall 135 can more reliably prevent the powder waste and the like generated in the contact portion 40 from entering the auxiliary contact side space S3.

In the present embodiment, the 2 nd side wall 132 has an extension 1321 extending outward of the wide axis. The extension 1321 is provided to extend along the wide axis and the up-down axis from the rear end of the front-rear axis of the 2 nd side wall 132. In the present embodiment, the extension 1321 is formed from the lower end to the upper end side (halfway of the upper end) of the 2 nd side wall 132. That is, the extension 1321 is provided continuously with the 2 nd sidewall 132 in a state where the upper end of the 2 nd sidewall 132 protrudes above the upper end of the extension 1321 (see fig. 6 and 7).

When arc a is generated between movable contact 421 and fixed contact 411, movable contact 421 and fixed contact 411 may be stuck by arc heat. In addition, the movable contact 421 and the fixed contact 411 may be deteriorated by arc heat.

When the arc a is generated between the movable contact 421 and the fixed contact 411 in this way, the contacts (the movable contact 421 and the fixed contact 411) may be affected by the arc. In particular, in an electromagnetic relay through which a large current flows, the contacts (the movable contact 421 and the fixed contact 411) are greatly affected by the arc.

Therefore, it is preferable that the arc a generated between the movable contact 421 and the fixed contact 411 disappears more reliably and more quickly, and the influence of the arc on the contacts (the movable contact 421 and the fixed contact 411) can be suppressed.

Thus, in the present embodiment, the arc a generated between the movable contact 421 and the fixed contact 411 can be extinguished more reliably and more quickly. Specifically, the electromagnetic relay 1 includes the yoke 80 disposed on the side of at least one of the body portions 422 and 412 of the body portion (1 st body portion) 412 and the movable contact (2 nd body portion) 422. That is, the yoke 80 is disposed on at least one member side of the body portion 412 and the movable contact 422.

By disposing the magnetic yoke 80 on the side of at least one of the body 412 and the movable contact 422, the strength of the magnetic flux B generated around the member on which the magnetic yoke 80 is disposed (the body 412 or the movable contact 422) can be increased, and the arc a can be extinguished more reliably and more quickly.

In the present embodiment, the electromagnetic relay 1 includes the fixing portion 90 that fixes the yoke 80 and the body portions 422 and 412 on which the yoke 80 is disposed. That is, the yoke 80 and the body portions 422 and 412 on which the yoke 80 is disposed are fixed by the fixing portion 90. In this way, the yoke 80 can be prevented from being displaced from the body portions 422 and 412 on which the yoke 80 is disposed.

Here, in the present embodiment, as shown in fig. 26 to 33, the yoke 80 is disposed on the movable contact 422 side, which is at least one of the body portion 412 and the movable contact 422. That is, in the present embodiment, the movable contact 422 is a body portion on which the yoke 80 is disposed.

The movable contact 422, which is a body portion on which the yoke 80 is arranged, has an opposing surface 4221 positioned on the side of the 1 st contact 411 opposing the 2 nd contact 412. The movable contact 422 also has a disposition surface 4222 located on the front and rear axes on the opposite side of the opposing surface 4221.

In the present embodiment, the arrangement surface 4222 has a specific region R1, and the specific region R1 overlaps the body portion 412 as the counterpart body portion when viewed along the front-rear axis in a state where the 1 st contact 411 is in contact with the 2 nd contact 421.

That is, in the present embodiment, a region where the body portion (1 st body portion) 412 and the movable contact (2 nd body portion) 422 overlap when the fixed contact 411 and the movable contact 421 are in contact with each other as viewed in a direction in which the fixed contact 411 and the movable contact 421 move relative to each other is defined as a specific region R1 (see fig. 34).

The movable contact 422 is configured to flow a current I along a wide axis intersecting the front-rear axis in the specific region R1.

The yoke 80 is disposed so as to at least partially overlap the specific region R1 when viewed along the front-rear axis.

Specifically, the yoke 80 includes a substantially rectangular side wall 81 elongated in the width axis, a top wall 82 provided continuously with the upper end of the side wall 81, and a bottom wall 83 provided continuously with the lower end of the side wall 81 and extending in the same direction as the top wall 82.

The front surface 81a of the side wall 81 and the rear surface (arrangement surface) 4222 of the movable contact 422 are arranged to face each other with the distal end 82b of the top wall 82 and the distal end 83b of the bottom wall 83 facing the front side of the front-rear axis.

Therefore, in the present embodiment, the side wall 81 of the yoke 80 is disposed on the surface (disposition surface) 4222 side of the movable contact 422 opposite to the side on which the movable contact 421 is formed.

At this time, the side wall 81 of the yoke 80 is disposed so as to overlap with the contact point (movable contact 421) of the main body portion (movable contact 422) on the side where the yoke 80 is disposed, when viewed along the front-rear axis. Therefore, the side wall 81 of the yoke 80 is disposed so as to overlap the contact region R2 where the fixed contact 411 and the movable contact 421 contact each other when viewed along the front-rear axis. In other words, the yoke 80 is arranged along the front-rear axis with the movable contact 421 of the movable contact 422, which is the body on which the yoke 80 is arranged.

Therefore, in the present embodiment, a part of side wall 81 of yoke 80 overlaps with contact region R2 where fixed contact 411 and movable contact 421 contact when viewed in the direction in which fixed contact 411 and movable contact 421 move relative to each other (see fig. 34). At this time, the side wall 81 is disposed so as to overlap the entire region of the contact region R2.

In this way, at least a part of the yoke 80 is disposed so as to be along the magnetic flux B generated by the current I flowing through the movable contact 422 (the body portion on the side where the yoke 80 is disposed) and the magnetic flux B generated in the specific region R1.

That is, at least part of the yoke 80 is disposed in a space belonging to the specific region R1 among the spaces in the vicinity of the movable contact (2 nd body portion) 422 along the magnetic flux B generated around the movable contact (2 nd body portion) 422.

In this way, in the present embodiment, by disposing the yoke 80 as described above, the magnetic flux B generated around the movable contact (2 nd body portion) 422 can be concentrated in the yoke 80. Further, the intensity of the magnetic flux B generated around the movable contact (2 nd body portion) 422 is increased (the magnetic field around the movable contact 422 is increased), and the arc a generated between the movable contact 421 and the fixed contact 411 can be extinguished more reliably and more quickly.

In the present embodiment, the movable contact 422, which is a body portion in which the yoke 80 is arranged, is provided with a through hole 422a, and the through hole 422a is penetrated by the contact member 4211 forming the movable contact 421 included in the movable contact 422. Further, a concave portion 4222a for accommodating the contact point member 4211 is formed on the arrangement surface 4222 of the movable contact 422.

In this way, interference with the contact point member 4211 when the yoke 80 is disposed on the movable contact 422 is suppressed. Further, the positioning accuracy of the yoke 80 and the movable contact 422 can be further improved.

The movable contact 422, which is a body portion on which the yoke 80 is arranged, has a side surface 4223 (upper surface) and a side surface 4224 (lower surface) provided continuously to the opposing surface 4221 and the arrangement surface 4222. The yoke 80 has arm portions arranged along the side surfaces 4223 and 4224. In the present embodiment, the top wall 82 is an arm portion disposed along the side surface 4223, and the bottom wall 83 is an arm portion disposed along the lower surface 4224.

The fixing portion 90 has an abutting portion 81ba against which the projection 422b and the projection 422b can abut. In the present embodiment, the protrusion 422b is provided on the movable contact 422 which is a body portion on which the yoke 80 is arranged. That is, the protrusion 422b is directly provided on the movable contact 422, which is a body portion on which the yoke 80 is arranged.

Further, the abutting portion 81ba is formed on the yoke 80. Specifically, a through hole (opening) 80b is formed in the side wall 81 of the yoke 80. The yoke 80 is fixed to the movable contact 422 by caulking and fixing the yoke 80 and the movable contact 422 so that the caulking portion 91 is formed at the tip end of the protrusion 422b of the movable contact 422 in a state where the protrusion 422b is inserted into the through hole 80b. Therefore, in the present embodiment, the inner peripheral surface of the through hole 80b and the peripheral edge of the through hole 80b of the back surface 81b of the side wall 81 serve as the contact portion 81ba against which the projection 422b can contact.

When the yoke 80 is fixed to the movable contact 422, the lower surface 82a of the top wall 82 is brought into surface contact with the side surface 4223 (upper surface) of the movable contact 422, and the upper surface 83a of the bottom wall 83 is brought into surface contact with the lower surface 4224 of the movable contact 422.

Here, in the present embodiment, the 1 st movable contact 421A and the 2 nd movable contact 421B are arranged in a row along the wide axis in one movable contact 422. Further, the two main body portions (the 1 st fixed contact side terminal 412A and the 2 nd fixed contact side terminal 412B) have the 1 st fixed contact 411A and the 2 nd fixed contact 411B.

Also, the 1 st movable contact 421A is brought into contact with and separated from the 1 st fixed contact 411A, and the 2 nd movable contact 421B is brought into contact with and separated from the 2 nd fixed contact 411B.

Therefore, in the present embodiment, yoke 80 includes 1 st yoke 840 disposed on the side where 1 st movable contact 421A is located and 2 nd yoke 850 disposed on the side where 2 nd movable contact 421B is located. The 1 st yoke 840 and the 2 nd yoke 850 are coupled by a coupling portion 860.

As described above, in the present embodiment, the yoke 80 is exemplified by a structure in which the 1 st yoke 840 and the 2 nd yoke 850 are integrated by the coupling portion 860.

In the present embodiment, the yoke 80 has a shape in which a notch 80a is provided in the center of the Y axis, and the length of the Z axis in the center of the Y axis is shorter than the length of the Z axis at both ends of the Y axis. The notch 80a is provided to suppress interference between the yoke 80 and the movable portion 50.

The portion where the notch 80a is formed in the center of the Y axis is the coupling portion 860, and the portions on both ends of the Y axis are the 1 st yoke 840 and the 2 nd yoke 850, respectively. As described above, if the Z-axis length of the coupling section 860 is made shorter than the Z-axis length of the 1 st and 2 nd yokes 840 and 850, the magnetic flux B generated around the movable contact 422 can be concentrated more efficiently on the 1 st and 2 nd yokes 840 and 850 sides, and the strength of the magnetic flux B generated around the contacts (the fixed and movable contacts 411 and 421 that are in contact with and separated from each other) can be further increased.

The top wall 82 and the bottom wall 83 of the yoke 80 are also formed as one on each side of the Y axis by the notch 80a, and become the arm portion of the 1 st yoke 840 and the arm portion of the 2 nd yoke 850, respectively.

Specifically, the top wall 82 disposed on the side surface 4223 (upper surface) of the movable contact 422, which is provided continuously with the 1 st yoke 840, becomes the 1 st arm 841. The top wall 82 provided continuously with the 2 nd yoke 850 and disposed on the side surface 4223 (upper surface) of the movable contact 422 serves as the 2 nd arm 851.

In the present embodiment, the bottom wall 83 disposed on the lower surface (2 nd end surface) 4224 of the movable contact 422, which is provided continuously with the 1 st yoke 840 and the 2 nd yoke 850, respectively, serves as the 3 rd arm portion. The bottom wall 83 is disposed below a portion of the movable contact 422 where the notch 422c is not formed. Therefore, in the present embodiment, in a state where the fixed contact 411 and the movable contact 421 are separated, the shortest distance D1 between the yoke 80 and the body portion 412 of the fixed contact portion 410, which is the counterpart side body portion, is shorter than the shortest distance D2 between the body portion (1 st body portion) 412 and the movable contact (2 nd body portion) 422 (see fig. 25).

In the present embodiment, a through hole (opening) 80b for fixing the yoke 80 to the movable contact 422 is formed in the connection portion 860. That is, the protrusion 422b is provided at a position offset from the movable contact 421 of the movable contact 422, which is a body portion on which the yoke 80 is arranged.

Thus, the yoke 80 can be fixed to the movable contact 422 without being obstructed by the movable contact 421, and the workability of attaching the yoke 80 to the movable contact 422 can be further improved.

In the present embodiment, a movable spring (connecting member) 53 that moves integrally with the movable contact 422 in accordance with excitation and non-excitation of the coil 210 is connected to the movable contact 422. The yoke 80 is also coupled to the movable spring (coupling member) 53 together with the movable contact 422. Specifically, the yoke 80 is coupled to the movable spring (coupling member) 53 at the coupling portion 860 together with the movable contact 422.

In the present embodiment, when the yoke 80 and the movable contact 422 are fixed by the fixing portion 90, the movable spring (connecting member) 53 is also fixed by the fixing portion 90. At this time, the movable spring (coupling member) 53 is disposed between the movable contact 422 and the coupling portion 860.

Thus, the displacement of the movable contact 422 and the movable spring (connecting member) 53 can be suppressed while the displacement of the movable contact 422 and the yoke 80 is suppressed.

In the present embodiment, the case where the yoke 80 is disposed on the movable contact 422 is exemplified, but the yoke 80 may be disposed on the body portion 412. The yoke 80 may be disposed on both the movable contact 422 and the body 412.

In the present embodiment, the arc a generated between the movable contact 421 and the fixed contact 411 can be moved more quickly so as to separate from the movable contact 421 and the fixed contact 411.

Specifically, as shown in fig. 18 to 23, the body portion 412 is formed with a protruding portion 417 protruding toward the movable contact 422. At this time, the protruding portion 417 is formed so as to be positioned rearward (on the movable contact 422 side) of the distal end (top portion) 411a of the fixed contact 411.

In the present embodiment, the fixed contact portion 410 has an outer extension portion 415, and the outer extension portion 415 is disposed outside between the fixed contacts 411 disposed so as to be aligned along the wide axis. Further, a projection 417 is coupled to the outer extension portion 415.

Here, in the present embodiment, the protruding portion 417 has the 1 st portion 4171 protruding upward (2 nd end side) of the vertical axis from the upper surface (end surface) 415c of the outer extension portion 415. The protruding portion 417 has a 2 nd portion 4173 protruding toward the movable contact 421 with respect to the front surface (facing surface: surface on the side facing the movable contact) of the fixed contact 410. The protruding portion 417 has a bent portion 4172 that connects the 1 st portion 4171 and the 2 nd portion 4173.

Such a projecting portion 417 can be formed by, for example, bending an upper portion of a plate-like member projecting upward (2 nd end side) of the vertical axis from an upper surface (end surface) 415c of the outer extending portion 415 by 180 degrees toward the rear of the front-rear axis.

As described above, in the present embodiment, the protruding portion 417 bent upward and downward is formed at a portion of the fixed contact portion 410 that is offset from the current-carrying portion (the portion through which current flows between the lead terminal 414 and the fixed contact 411). A protrusion 417 is formed outward between the pair of fixed contacts 411 arranged to be aligned along the Y axis.

In this way, the projecting portion 417 is formed in the vicinity of the outer side between the fixed contacts 411, and the arc a generated when the contacts are opened can be quickly moved from the movable contact 421 and the fixed contacts 411 to the projecting portion 417.

In the present embodiment, the thickness of the fixed contact portion 410 is increased, so that a large current flows through the electromagnetic relay 1. Therefore, when the projecting portion is formed by bending both side ends of the wide axis of the fixed contact portion 410, it is necessary to provide a large notch in the conducting portion of the fixed contact portion 410, so that the width dimension of the fixed contact portion 410 is reduced and the bending process of the projecting portion is facilitated. Further, if a large notch is provided in the current-carrying portion of the fixed contact portion 410, the width of the current-carrying portion of the fixed contact portion 410 becomes narrower than in the case where no notch is provided, and it becomes difficult to pass a large current.

In contrast, in the present embodiment, unlike the case where the protruding portions are formed on both side ends of the wide axis of the fixed contact portion 410, the protruding portion 417 is formed without providing a notch in the conducting portion of the fixed contact portion 410. Specifically, the protruding portion 417 is formed at a portion of the fixed contact portion 410 that is offset from the conducting portion.

Further, the terminal connection portion 413 is extended along the wide axis so as to exist at least between an inner end (end on the fixed contact 411 side) 417a of the wide axis of the protruding portion 417 and the fixed contact 411. In the present embodiment, the terminal connection portion 413 is extended along the wide axis so as to be present between the outer end 417b of the wide axis of the protruding portion 417 and the fixed contact 411.

In this way, the protruding portion 417 can be formed in the fixed contact portion 410 without narrowing the width of the conducting portion of the fixed contact portion 410 (reducing the terminal cross-sectional area of the conducting portion). Further, when the terminal cross-sectional area of the current-carrying portion of the fixed contact portion 410 is increased, heat generation due to a large current can be more reliably suppressed.

As described above, in the present embodiment, even when the thickness of the fixed contact 410 is increased, the influence of the arc a generated when the contacts are opened on the movable contact 421 and the fixed contact 411 can be more reliably suppressed while the terminal cross-sectional area of the current-carrying portion is secured.

In the present embodiment, the 1 st portion 4171 and the 2 nd portion 4173 are coupled by the U-shaped bent portion 4172. Furthermore, 2 nd portion 4173 faces front and rear of outer extending portion 415.

In this way, the protruding portion 417 can be formed simply by bending the plate 180 degrees, and the protruding portion 417 can be formed more easily. Further, when the 1 st portion 4171 and the 2 nd portion 4173 are coupled by the U-shaped bent portion 4172, the protruding portion 417 can be brought closer to the fixed contact 411 more easily. Further, if the projection 417 is formed by bending a plate 180 degrees, the amount of projection of the projection 417 to the rear of the front-rear axis can be determined by setting the plate thickness, and therefore the amount of projection of the projection 417 can be controlled more easily.

In the present embodiment, the width W1 of the curved portion 4172 along the Y axis is smaller than the length L1 connecting the curved top portion 4172a of the curved portion 4172 and the lower end (tip end) 4173a of the 2 nd portion 4173. In this way, the plate at the position of the projection 417 can be bent more easily.

Further, the 2 nd portion 4173 and the fixed contact 411 are arranged along the wide axis. That is, projection 417 is formed so that upper and lower positions of 2 nd portion 4173 and fixed contact 411 are substantially the same. Thus, the 2 nd portion 4173 and the fixed contact 411 are opposed to each other along the direction in which the arc a is stretched, i.e., the wide axis. In this way, the arc a generated when the contacts are opened can be more easily and reliably moved quickly from the movable contact 421 and the fixed contact 411 to the projection 417.

Further, a notch 4152 is formed in the outer extension 415 at a position on the inner side of the wide axis than the 1 st portion 4171. In the present embodiment, the notch 4152 is formed so as to be located above the vertical axis of the fixed contact 411. In this way, the material used for punching the material to form the fixed contact portion 410 is reduced.

In addition, a tapered portion 4174 having a narrower width (a narrower width along the Y axis) toward the tip (lower end) is formed in the 2 nd portion 4173. Specifically, in a state where the fixed contact portion 410 is viewed along the front-rear axis, the side closer to the fixed contact 411 in the inner side (fixed contact portion side) of the wide axis of the 2 nd portion 4173 is inclined so as to be the upper side of the up-down axis toward the inner side (fixed contact portion side) of the wide axis. Thus, the 2 nd portion 4173 has a tapered portion 4174.

With such a configuration, it is possible to secure a contact gap (a distance required to further maintain insulation when the contacts are opened) between the fixed contact portion 410 and the movable contact portion 420 while downsizing the device.

Further, instead of forming the tapered portion 4174 in the protruding portion 417, the protruding portion 417 may be formed by bending a plate protruding upward from the upper surface (end surface) 415c of the outer extension portion 415 by 90 degrees. Further, the protrusion 417 formed by bending 90 degrees may have a tapered portion 4174. In other words, the shape of the projection 417 can be various shapes.

In the present embodiment, the fixed contact portion 410 includes an inner extension portion 416 disposed between the fixed contacts 411 and facing the movable contact portion 420 along the front-rear axis. When the fixed contact 410 is fixed to the base 110 (housing 10), the inner extension 416 is press-fitted into the inner press-fitting groove 116 formed in the base 110, and the outer extension 415 is press-fitted into the outer press-fitting groove 117. At this time, the inner-side press-fitting groove 116 is provided with a press-fitting projection 116a projecting along the front-rear axis, and the inner-side extended portion 416 is press-fitted into the inner-side press-fitting groove 116 by the press-fitting projection 116 a. Similarly, the outer press-fitting groove 117 is provided with a press-fitting protrusion 117a protruding along the front-rear axis, and the outer extension 415 is press-fitted into the outer press-fitting groove 117 by the press-fitting protrusion 117 a.

Therefore, in the present embodiment, when fixed contact 410 is fixed to base 110 (housing 10), both surfaces (front surface 416a and rear surface 416 b) of end 4161 of inner extension 416 are in contact with housing 10, and both surfaces (front surface 415a and rear surface 415 b) of end 4151 of outer extension 415 are in contact with housing 10.

In this way, the positioning accuracy of the fixed contact portion 410 with respect to the housing 10 can be further improved. Thus, the contact gap when the movable contact 421 and the fixed contact 411 are at the 2 nd position can be determined with higher accuracy, and the contact pressure when the movable contact 421 and the fixed contact 411 are at the 1 st position can be ensured. Further, since both sides of the wide axis of fixed contact portion 410 are press-fitted and fixed to case 10, fixed contact portion 410 can be more firmly fixed to case 10.

In the present embodiment, a movable-side protrusion 4226 protruding toward the body 412 is formed at the end 4225 of the wide shaft of the movable contact 422.

In the present embodiment, the movable-side protrusion 4226 is formed on the movable contact 422 by bending the Y-axis end portion of the substantially rectangular plate-shaped member elongated in the Y-axis forward (toward the body portion 412).

At this time, the movable-side protrusion 4226 is formed such that the tip 4226a of the movable-side protrusion 4226 is positioned forward (toward the body 412) of the tip (top) 421a of the movable contact 421.

In the present embodiment, the movable side protrusion 4226 is located inward of the protrusion 417 in the width axis direction (see fig. 37).

By forming the body portion 412 and the movable contact 422 into the above-described shapes, when an arc a is generated between the movable contact 421 and the fixed contact 411, the arc starting point (discharge point) A1 of the arc a is moved toward the protruding portion 417 and the movable-side protruding portion 4226 on the movable contact 421 side and the fixed contact 411 side.

Specifically, the arc a generated between the movable contact 421 and the fixed contact 411 moves toward the protrusion 417 and toward the movable side protrusion 4224 by applying a lorentz force on the outside of the Y axis to the arc a generated between the movable contact 421 and the fixed contact 411 and pulling the arc a outward of the Y axis.

In the present embodiment, since the movable-side protrusion 4226 is positioned inward of the protrusion 417 in the Y-axis direction, the arc a moving to the protrusion 417 side and the movable-side protrusion 4226 side is pulled outward in the Y-axis direction and rearward in the X-axis direction.

Therefore, in the present embodiment, as shown in fig. 39, in a state where the body portion 412 and the movable contact 422 are housed in the housing 10, a space is formed outside the Y axis and behind the X axis of the protruding portion 417 and the movable side protruding portion 4226.

In this way, it is possible to more reliably suppress the case 10 and the members housed in the case 10 from being affected by the arc a that is drawn outward in the Y axis direction and rearward in the X axis direction.

As shown in fig. 40, the movable-side protrusion 4226 may be located outward of the protrusion 417 in the Y axis.

For example, when a space is formed outside the Y axis and in front of the X axis of the protruding portion 417 and the movable side protruding portion 4226 in a state where the body portion 412 and the movable contact 422 are housed in the housing 10, it is preferable to adopt the configuration shown in fig. 40.

In the present embodiment, the case where the protruding portions are provided on both the main body portion 412 and the movable contact 422 is exemplified, but the protruding portions may be provided only on the main body portion 412.

The shape of the yoke 80 is not limited to the shape described in the above embodiment, and various shapes can be adopted.

For example, the yoke 80 shown in fig. 41 to 49 can be used.

The yoke 80 shown in fig. 41 to 49 also includes a substantially rectangular side wall 81 elongated in the width axis, a top wall 82 provided continuously with the upper end of the side wall 81, and a bottom wall 83 provided continuously with the lower end of the side wall 81 and extending in the same direction as the top wall 82.

The front surface 81a of the side wall 81 and the rear surface (arrangement surface) 4222 of the movable contact 422 are arranged to face each other with the distal end 82b of the top wall 82 and the distal end 83b of the bottom wall 83 facing the front side of the front-rear axis.

The top wall 82 is an arm portion disposed along the side surface 4223 (upper surface), and the bottom wall 83 is an arm portion disposed along the lower surface 4224.

The yoke 80 shown in fig. 41 to 49 also includes a1 st yoke 840 disposed on the side where the 1 st movable contact 421A is located, and a 2 nd yoke 850 disposed on the side where the 2 nd movable contact 421B is located. The 1 st yoke 840 and the 2 nd yoke 850 are coupled by a coupling portion 860.

The yoke 80 is fixed to a movable contact 422, which is a body portion on which the yoke 80 is disposed, by a fixing portion 90.

In the yoke 80 shown in fig. 41 to 49, only the connecting portion 860 of the 1 st yoke 840, the 2 nd yoke 850, and the connecting portion 860 has the bottom wall (the 3 rd arm portion) 83.

The bottom wall (3 rd arm) 83 formed in the connection portion 860 is accommodated in the notch portion 422c of the movable contact 422. In this way, the 3 rd arm 83 can be prevented from protruding to the lower side of the movable contact 422.

In a state where the yoke 80 is fixed to the movable contact 422, the lower end surface (lower end surface) 81c of the side wall 81, which is a portion of the 1 st yoke 840 and the 2 nd yoke 850, is located above the lower surface 4224 of the movable contact 422.

In this way, in a state where the fixed contact 411 and the movable contact 421 are separated, the shortest distance D1 between the yoke 80 and the body portion 412 of the fixed contact portion 410, which is the counterpart body portion, is equal to or greater than the shortest distance D2 between the body portion (1 st body portion) 412 and the movable contact (2 nd body portion) 422.

In this way, the influence of the yoke 80 on the electrical insulation can be reduced while more reliably suppressing the influence of the arc on the contacts.

The yoke 80 shown in fig. 50 to 57 may be used.

Although the yoke 80 shown in fig. 50 to 57 includes a substantially rectangular side wall 81 elongated in the width axis and a top wall 82 provided continuously to the upper end of the side wall 81, a bottom wall 83 is not formed in the yoke 80.

The front surface 81a of the side wall 81 is disposed so as to face the rear surface (disposition surface) 4222 of the movable contact 422 in a state where the distal end 82b of the top wall 82 faces the front side of the front-rear axis. The top wall 82 is an arm portion disposed along the side surface 4223 (upper surface).

Further, the yoke 80 shown in fig. 50 to 57 also includes a1 st yoke 840 disposed on the side where the 1 st movable contact 421A is located and a 2 nd yoke 850 disposed on the side where the 2 nd movable contact 421B is located. The 1 st yoke 840 and the 2 nd yoke 850 are coupled by a coupling portion 860.

Further, the yoke 80 is fixed to a movable contact 422, which is a body portion in which the yoke 80 is arranged, by a fixing portion 90.

In a state where the yoke 80 is fixed to the movable contact 422, the lower end surface (lower end surface) 81c of the side wall 81, which is a portion of the 1 st yoke 840 and the 2 nd yoke 850, is located above the lower surface 4224 of the movable contact 422.

In this way, in a state where the fixed contact 411 and the movable contact 421 are separated, the shortest distance D1 between the yoke 80 and the body portion 412 of the fixed contact portion 410, which is the counterpart side body portion, becomes equal to or greater than the shortest distance D2 between the body portion (1 st body portion) 412 and the movable contact (2 nd body portion) 422.

In this way, the influence of the yoke 80 on the electrical insulation can be reduced while more reliably suppressing the influence of the arc on the contacts.

(embodiment 2)

As shown in fig. 58 and 59, the electromagnetic relay 1 of the present embodiment includes a case 10 formed of a resin material into a hollow box shape. In the present embodiment, the casing 10 has a base 110 and a housing 120 covering the base 110, and has a substantially rectangular parallelepiped outer surface. In addition, in a state where the housing 120 is attached to the base 110, an internal space S1 is formed in the case 10. In addition, the shape of the outer side surface of the housing 10 is not limited to a rectangular parallelepiped shape, and may be any shape.

An electromagnet device (drive unit) 20 is disposed rearward on the front-rear axis in the internal space S1 of the housing 10, and a contact point unit 40 is disposed forward on the front-rear axis.

The electromagnet device 20 includes a bobbin 220 around which a coil 210 is wound, an iron core 230, a yoke 240, and a coil terminal 250. Further, in the present embodiment, the electromagnet device 20 includes a permanent magnet 260 sandwiched by portions of the yoke 240 provided upright from the base 110.

Also, the moving member 30 is moved by switching the driving state of the electromagnet device 20.

In the present embodiment, the moving member 30 includes an armature 310 disposed to face the iron core 230 along the up-down axis (Z-axis) and a hinge spring 320 mounted across the armature 310 and the yoke 240.

The armature 310 is made of a conductive metal and is arranged to be swingable along the vertical axis (Z axis) with respect to the core 230 in accordance with excitation and non-excitation of the coil 210.

The armature 310 includes a horizontal wall portion 311 facing the core 230 along the vertical axis (Z axis), and a vertical wall portion 312 extending downward from the tip of the horizontal wall portion 311 in the front-rear direction (X axis).

By switching the driving state of the electromagnet device 20 and swinging the armature 310, conduction and non-conduction between the fixed contact portion 410 and the movable contact portion 420 that are paired with each other (have contacts that are in contact with and separated from each other) can be switched.

The contact portion 40 includes a fixed contact portion 410 and a movable contact portion 420, and the fixed contact portion 410 includes a fixed contact 411 and a main body portion 412 having the fixed contact 411. On the other hand, the movable contact portion 420 includes a movable contact 421 that moves relative to the fixed contact 411 and can be brought into contact with and separated from the fixed contact 411, and a movable spring 422 having the movable contact 421. In the present embodiment, the contact portion 40 includes one main body portion 412 having one fixed contact 411 and one movable spring 422 having one movable contact 421.

The contact portion 40 is provided continuously with the armature 310 via the movable portion 50. Then, by swinging the movable portion 50 along the front-rear axis (X axis) in accordance with the swinging of the armature 310, the movable contact portion 420 swings along the front-rear axis (X axis) in conjunction with the operation of the movable portion 50.

The movable portion 50 includes a body portion 54, and is disposed between the vertical wall portion 312 of the armature 310 and the movable contact portion 420 of the contact portion 40. A rotation support shaft 55 provided at the lower end of the body 54 is swingably attached to the base 110.

Further, the body portion 54 is provided with a1 st protrusion 56 that abuts against the vertical wall portion 312 on the side facing the vertical wall portion 312, and is provided with a 2 nd protrusion 57 that is located above the 1 st protrusion 56 on the side facing the contact portion 40.

When the vertical wall portion 312 is moved in the direction away from the yoke 240 by the driving of the electromagnet device 20, the moving force is input to the main body portion 54 via the 1 st projection 56, and the main body portion 54 moves in the direction of the contact portion 40.

In the present embodiment, the contact portion 40 is configured as the following contacts: when the electromagnet device 20 is driven so that the horizontal wall portion 311 is attracted to the iron core 230, the fixed contact 411 and the movable contact 421 come into contact with each other.

As shown in fig. 58, the housing 120 is formed as a rectangular parallelepiped case having an entire lower opening, and the housing 120 is attached to the base 110 by fitting the lower end opening substantially tightly to a step portion formed on the outer periphery of the base 110. At this time, the protrusion 112a of the base 110 is inserted into the through hole 122a of the housing 120, and the housing 120 is prevented from falling off.

A partition wall 130 is formed inside the housing 120. The partition wall 130 is provided so as to be positioned between the vertical wall portion 312 of the armature 310 and the movable portion 50. Further, partition wall 130 has a notch 130a through which first projection 56 passes.

Here, in the present embodiment as well, the arc a generated between the movable contact 421 and the fixed contact 411 can be extinguished more reliably and more quickly. In the present embodiment, the arc a is stretched upward (outward of the Z axis).

Specifically, the electromagnetic relay 1 includes the yoke 80 disposed on the side of at least one of the body portions 422 and 412 (the 1 st body portion) 412 and the movable spring (the 2 nd body portion) 422.

The electromagnetic relay 1 includes a fixing portion 90 for fixing the yoke 80 and the body portions 422 and 412 on which the yoke 80 is disposed.

Here, in the present embodiment, as shown in fig. 58 and 59, the yoke 80 is disposed on the side of the body portion 412, which is at least one member of the body portion 412 and the movable spring 422. That is, in the present embodiment, the body portion 412 of the fixed contact portion 410 serves as a body portion on which the yoke 80 is disposed.

The body portion 412 on which the yoke 80 is arranged has an opposing surface 4121 located on the side of the 1 st contact 411 opposing the 2 nd contact 412. The body portion 412 has an arrangement surface 4122 located on the opposite side of the opposing surface 4121 on the front and rear axes.

The arrangement surface 4122 has a specific region R1, and the specific region R1 overlaps the movable spring 422 as the counterpart side body when viewed along the front-rear axis in a state where the 1 st contact 411 and the 2 nd contact 421 are in contact with each other.

The body 412 is configured to flow a current I along the vertical axis intersecting the front-rear axis in the specific region R1.

The yoke 80 is disposed so as to at least partially overlap the specific region R1 when viewed along the front-rear axis.

Specifically, the yoke 80 includes a substantially rectangular side wall 81 elongated in the vertical axis, a1 st wall 82 provided continuously with the 1 st end of the wide axis of the side wall 81, and a 2 nd wall 83 provided continuously with the 2 nd end of the side wall 81 and extending in the same direction as the 1 st wall 82.

The front surface 81a of the side wall 81 and the rear surface (arrangement surface) 4122 of the body 412 are arranged to face each other with the distal ends of the 1 st wall 82 and the 2 nd wall 83 facing the rear side of the front-rear axis.

At this time, the side wall 81 of the yoke 80 is disposed so as to overlap the contact (fixed contact 411) of the body portion (body portion 412) on the side where the yoke 80 is disposed, when viewed along the front-rear axis. Therefore, the side wall 81 of the yoke 80 is disposed so as to overlap the contact region R2 where the fixed contact 411 and the movable contact 421 contact each other when viewed along the front-rear axis. That is, the yoke 80 is arranged in a state where the contact (fixed contact) 421 of the body portion 412 on which the yoke 80 is arranged is aligned along the front-rear axis.

In this way, in the present embodiment, by disposing the yoke 80 as described above, the magnetic flux B generated around the main body portion (1 st main body portion) 412 can be concentrated in the yoke 80. In addition, the intensity of the magnetic flux B generated around the main body portion (1 st main body portion) 412 is increased (the magnetic field around the main body portion 412 is increased), and the arc a generated between the movable contact 421 and the fixed contact 411 can be eliminated more reliably and more quickly.

The body portion 412, which is the body portion on which the yoke 80 is arranged, has side surfaces (1 st surface 4123 and 2 nd surface 4124) provided continuously from the opposing surface 4121 and the arrangement surface 4122. The yoke 80 has arm portions disposed along the side surfaces (the 1 st surface 4123 and the 2 nd surface 4124). In the present embodiment, the 1 st wall 82 is an arm portion disposed along the 1 st surface 4123, and the 2 nd wall 83 is an arm portion disposed along the 2 nd surface 4124.

Further, the fixing portion 90 has a protrusion 411b and an abutting portion 81ba against which the protrusion 411b can abut. In the present embodiment, the protrusion 411b is provided on the contact 411 of the body portion 412 on which the yoke 80 is disposed.

Further, the abutting portion 81ba is formed on the yoke 80. In the present embodiment, the inner peripheral surface of the through hole 80b and the peripheral edge of the through hole 80b of the back surface 81b of the side wall 81 serve as the contact portion 81ba against which the projection 422b can contact.

In the present embodiment, the case where the yoke 80 is disposed on the body portion 412 of the fixed contact portion 410 is exemplified, but the yoke 80 may be disposed on the movable spring 422. The yoke 80 may be disposed on both the body portion 412 and the movable spring 422.

[ Effect, effect ]

Hereinafter, the characteristic structure of the electromagnetic relay shown in each of the above embodiments and the modifications thereof and the effects obtained thereby will be described.

(1) The electromagnetic relay 1 shown in each of the above embodiments and modifications thereof includes: an electromagnet arrangement 20 having a coil 210; the fixed contact 411 (or the movable contact 421); a movable contact 421 (or a fixed contact 411) which is opposed to the fixed contact 411 (or the movable contact 421) in the front-rear direction and is movable relative to the fixed contact 411 (or the movable contact 421) to be brought into contact with and separated from each other; a body portion 412 (or movable contact 422) having a fixed contact 411 (or movable contact 421); a movable contact 422 (or a body portion 412) having a movable contact 421 (or a fixed contact 411); a yoke 80 fixed to the movable contact 422 (or the body portion 412); and a fixing portion 90 (e.g., a protrusion 422 b) that fixes the yoke 80 to the movable contact 422 (or the body portion 412).

The movable contact 422 (or the body portion 412) has an opposing surface 4221 (or 4121) positioned on the side of the fixed contact 411 opposing the movable contact 421, and a disposition surface 4222 (or 4122) positioned on the opposite side of the opposing surface 4221 (or 4121).

The disposition surface 4222 (or 4122) has a specific region R1, the specific region R1 overlaps the body portion 412 (or the movable contact 422) when viewed in the front-rear direction, the yoke 80 is disposed so as to at least partially overlap the specific region R1 when viewed in the front-rear direction, and the movable contact 422 (or the body portion 412) on which the yoke 80 is disposed is configured so as to pass an electric current through the specific region R1. The fixed portion 90 includes a protrusion 422b (or 411 b) provided on the movable contact 422 (or the body portion 412) or the movable contact 421 (or the fixed contact 411) included in the movable contact 422 (or the body portion 412), and an abutting portion 81ba provided on the yoke 80 and capable of abutting against the protrusion 422b (or 411 b).

In this way, the magnetic flux B generated around the movable contact 422 or the body portion 412 on the side where the yoke 80 is arranged can be concentrated in the yoke 80. As a result, the intensity of the magnetic flux B generated around the movable contact 422 or the body portion 412 on the side where the yoke 80 is arranged is increased (the magnetic field is increased), and the arc a generated between the fixed contact 411 and the movable contact 421 can be eliminated more reliably and more quickly.

Further, the yoke 80 and the movable contact 422 or the body portion 412 on which the yoke 80 is disposed are fixed by the fixing portion 90. The yoke 80 can be prevented from being displaced from the movable contact 422 or the body portion 412 on which the yoke 80 is disposed. As a result, the strength of the magnetic flux B generated around the movable contact 422 or the body portion 412 on the side where the yoke 80 is arranged can be more reliably increased.

As described above, according to the electromagnetic relay 1 described in each of the above embodiments and the modifications thereof, it is possible to more reliably suppress the contact points from being affected by the arc.

(2) Further, it is preferable that the yoke 80 and the movable contact 422 (or the body portion 412) are caulked and fixed by the protrusion 422b (or the protrusion 411 b).

In this way, the yoke 80 and the movable contact 422 (or the body portion 412) can be fixed more reliably, and the contact can be more reliably prevented from being affected by the arc.

(3) Further, it is preferable that the protrusion 422b is formed on the movable contact 422 (or the body portion 412).

In this way, when the protrusion 422b is directly provided on the movable contact 422 (or the body portion 412), the positioning accuracy between the yoke 80 and the movable contact 422 (or the body portion 412) can be further improved. As a result, the contact can be more reliably prevented from being affected by the arc.

(4) Further, it is preferable that the protrusion 411b is formed on the contact 411 included in the main body portion 412.

In this way, the shape of the body portion 412 can be further simplified, and therefore, the manufacture of the body portion 412 becomes easier. Further, since the yoke 80 can be fixed in the step of attaching the contact 411 to the body portion 412, the workability of attaching the yoke 80 to the body portion 412 can be further improved.

(5) Further, the yoke 80 preferably has an opening 80b that accommodates the projections 422b, 411b.

Thus, the positioning accuracy between the yoke 80 and the movable contact 422 (or the body portion 412) can be further improved.

(6) Further, the yoke 80 is preferably arranged in line with the movable contact 421 (or the fixed contact 411) of the movable contact 422 (or the body portion 412).

In this way, magnetic flux B can be more reliably concentrated around contacts 421 and 411, and influence of arcing on the contacts can be more reliably suppressed.

(7) Further, the movable contact 422 (or the body portion 412) preferably has a through hole 422a through which the contact point member 4211 forming the movable contact 422 (or the body portion 412) passes, and a concave portion 4222a provided on the arrangement surface 4222 and accommodating the contact point member 4211.

In this way, since interference with the contact member 4211 is suppressed when the yoke 80 is disposed on the body portion 422, the positioning accuracy between the yoke 80 and the movable contact 422 (or the body portion 412) can be further improved.

(8) Preferably, the movable contact 422 (or the body portion 412) has side surfaces 4223, 4224, 4123, 4124 provided continuously to the opposing surfaces 4221, 4121 and the arrangement surfaces 4222, 4122, and the yoke 80 has arm portions 82, 83 arranged along the side surfaces 4223, 4224, 4123, 4124.

In this way, the magnetic flux B can be more reliably concentrated around the movable contact 422 (or the body portion 412), and the contact can be more reliably prevented from being affected by the arc.

(9) The movable contact 422 (or the body portion 412) may have a notch 422c for receiving the arm portions 82 and 83.

In this way, the arm portions 82 and 83 can be prevented from protruding from the movable contact 422 (or the body portion 412). As a result, the electromagnetic relay 1 can be downsized.

(10) Further, in a state where the fixed contact 411 and the movable contact 421 are separated, it is preferable that the shortest distance D1 between the yoke 80 and the movable contact 422 (or the body portion 412) is equal to or greater than the shortest distance D2 between the movable contact 422 and the body portion 412.

In this way, the influence of the yoke 80 on the electrical insulation can be reduced while more reliably suppressing the influence of the arc on the contacts.

(11) It is preferable that the protrusion 422b is provided at a distance from the movable contact 421 (or the fixed contact 411) of the movable contact 422 (or the body portion 412).

In this way, since the yoke 80 can be fixed to the movable contact 422 (or the body portion 412) without being obstructed by the movable contact 421 (or the fixed contact 411), the workability of attaching the yoke 80 to the movable contact 421 (or the fixed contact 411) can be further improved.

(12) Note that the fixed contacts 411 may include a1 st fixed contact 411A and a 2 nd fixed contact 411B, and the movable contact 412 may include a1 st movable contact 412A that is in contact with and separated from the 1 st fixed contact 411A and a 2 nd movable contact 412B that is in contact with and separated from the 2 nd fixed contact 411B.

Preferably, the main body portion 412 has a1 st fixed contact-point side terminal 412A and a 2 nd fixed contact-point side terminal 412B, the 1 st fixed contact-point side terminal 412A has a1 st fixed contact 411A, the 2 nd fixed contact-point side terminal 412B has a 2 nd fixed contact 411B, and the movable contact 422 has a1 st movable contact 421A and a 2 nd movable contact 421B.

In this way, it is possible to provide the electromagnetic relay 1 through which a larger current flows than in an electromagnetic relay having only one set of the fixed contact 411 and the movable contact 421.

(13) Further, it is preferable that the yoke 80 has: a1 st magnetic yoke 840 disposed on the side where the 1 st movable contact 421A is located; a 2 nd yoke disposed on the side where the 2 nd movable contact 421B is located; and a coupling portion 860 coupling the 1 st and 2 nd yokes 840 and 850 to each other.

By connecting the two yokes 840 and 850 with the connection portion 860 in this manner, the magnetic flux B can be further concentrated around the 1 st fixed contact side terminal 412A and around the 2 nd fixed contact side terminal 412B. As a result, the contact can be more reliably prevented from being affected by the arc.

(14) It is preferable that a connection member (movable spring 53) that moves integrally with the movable contact 422 according to excitation or non-excitation of the coil is further provided, and the connection member (movable spring 53) is disposed between the movable contact 422 and the connection portion 860.

This can further improve the positioning accuracy between the movable contact 422 and the yoke 80.

(15) Further, it is preferable that the movable contact 422 has: a side surface 4223 provided continuously to the opposing surface 4221 and the disposition surface 4222; and a side surface 4224 provided continuously with the opposing surface 4221 and the disposition surface 4222 and opposing the side surface 4223, wherein the 1 st yoke 840 has a1 st arm 841 disposed on the side surface 4223, and the 2 nd yoke 850 has a 2 nd arm 851 disposed on the side surface 4223.

In this way, the electromagnetic relay 1 can be miniaturized and the influence of the arc on the contact can be more reliably suppressed.

(16) Further, the yoke 80 preferably has a 3 rd arm portion 83 disposed on the side surface 4224.

In this way, the electromagnetic relay 1 can be downsized and the influence of the arc on the contact can be more reliably suppressed.

(17) Further, it is preferable that the end portion 4225 of the movable contact 422 has a protruding portion 4226 protruding toward at least one of the 1 st fixed contact-point side terminal 412A and the 2 nd fixed contact-point side terminal 412B.

In this way, the arc a generated when the contacts are opened can be quickly moved from the 1 st contact 411 and the 2 nd contact 421 to the projection 422.

[ others ]

The contents of the electromagnetic relay of the present disclosure have been described above, but it is obvious to those skilled in the art that various modifications and improvements can be made without being limited to the descriptions.

For example, the configurations described in the above embodiments and modifications thereof can be combined as appropriate.

In addition, although the case where the auxiliary contact portion 60 is in the open state when the contact portion 40 is in the closed state is described in the above embodiment 1 and the modification thereof, the auxiliary contact portion 60 may be in the closed state when the contact portion 40 is in the closed state. In this case, the contact portion 40 and the auxiliary contact portion 60 may be a so-called normally closed type contact portion in which the contacts are closed in the initial state, or the contact portion 40 and the auxiliary contact portion 60 may be a so-called normally open type contact portion in which the contacts are opened in the initial state.

In embodiment 1 and the modification thereof, the electromagnetic relay 1 including the auxiliary contact portion 60 is exemplified, but the electromagnetic relay 1 not including the auxiliary contact portion 60 may be adopted.

In each of the above embodiments and the modifications thereof, the movable spring 53 is exemplified as the coupling member, but the coupling member may be formed by a member other than a spring.

In the above embodiments and modifications, the through hole is exemplified as the opening, but the shape of the opening is not limited thereto, and various shapes such as a notch and a recess can be provided.

In the above embodiments and modifications, the case where the yoke 80 and the body portions 422 and 412 on which the yoke 80 is disposed are fixed by caulking with the projections 422b and 411b is exemplified. However, the yoke 80 and the body portions 422 and 412 on which the yoke 80 is disposed can be fixed by a method other than caulking, such as press fitting.

Further, the main bodies 412 and 422 shown in embodiment 2 may be provided with a protrusion for rapidly moving the arc a generated when the contact is opened. In this case, a projection is provided on the upper part of the main bodies 412 and 422.

The specifications (shape, size, layout, etc.) of the fixed contact portion, the movable contact portion, and other details can be changed as appropriate.

In the present embodiment, the yoke 80 is fixed to the movable contact 422, but the yoke 80 may be fixed to the fixed contact portion 410 provided with the fixed contact 411.

Claims (19)

1. An electromagnetic relay, wherein,

the electromagnetic relay includes:

an electromagnet arrangement having a coil;

a1 st contact;

a 2 nd contact opposed to the 1 st contact in a front-rear direction and capable of being moved relative to the 1 st contact to be brought into contact with and separated from the first contact;

a1 st body portion having the 1 st contact;

a 2 nd main body portion having the 2 nd contact;

a yoke fixed to the 2 nd body portion; and

a fixing portion for fixing the yoke to the 2 nd body portion,

the 2 nd body portion has an opposing surface located on a side of the 1 st contact opposite to the 2 nd contact and a disposition surface located on an opposite side of the opposing surface,

the arrangement surface has a specific region overlapping with the 1 st main body when viewed in the front-rear direction,

the yoke is disposed so as to at least partially overlap the specific region when viewed in the front-rear direction,

the 2 nd body portion on which the yoke is disposed is configured to flow an electric current in the specific region,

the fixing portion has:

a protrusion provided on the 2 nd body part or the 2 nd contact of the 2 nd body part; and

and an abutting portion provided in the yoke and against which the projection can abut.

2. The electromagnetic relay of claim 1,

the yoke and the 2 nd body portion are riveted and fixed by the projection.

3. The electromagnetic relay according to claim 1 or 2, wherein,

the projection is formed on the 2 nd body portion.

4. An electromagnetic relay according to any one of claims 1 to 3,

the projection is formed on the 2 nd contact of the 2 nd body portion.

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

the yoke has an opening portion that receives the protrusion.

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

the yoke and the 2 nd contact of the 2 nd body are arranged in a front-rear direction.

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

the 2 nd body portion has a through hole through which a contact member forming the 2 nd contact passes and a recess portion provided on the placement surface and accommodating the contact member.

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

the 2 nd main body portion has a side surface provided continuously with the opposing surface and the disposition surface,

the yoke has an arm portion disposed along the side surface.

9. The electromagnetic relay of claim 8 wherein,

the 2 nd main body portion has a notch portion that accommodates the arm portion.

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

in a state where the 1 st contact and the 2 nd contact are separated, a shortest distance between the yoke and the 1 st body portion is equal to or greater than a shortest distance between the 1 st body portion and the 2 nd body portion.

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

the projection is provided at a distance from the 2 nd contact of the 2 nd body.

12. The electromagnetic relay according to any one of claims 1 to 11,

the 1 st contact is a fixed contact,

the 2 nd contact is a movable contact,

the movable contact is separated from or brought into contact with respect to the fixed contact,

the 2 nd main body part is a movable contact and has the movable contact.

13. The electromagnetic relay according to any one of claims 1 to 11,

the 1 st contact is a movable contact,

the 2 nd contact is a fixed contact and,

the movable contact is separated from or brought into contact with respect to the fixed contact,

the 1 st body part is a movable contact and has the movable contact.

14. The electromagnetic relay according to any one of claims 1 to 11,

the 1 st contact comprises a1 st fixed contact and a 2 nd fixed contact,

the 2 nd contact has a1 st movable contact contacted and separated with the 1 st fixed contact and a 2 nd movable contact contacted and separated with the 2 nd fixed contact,

the 1 st main body part has a1 st fixed contact side terminal and a 2 nd fixed contact side terminal, the 1 st fixed contact side terminal has the 1 st fixed contact, the 2 nd fixed contact side terminal has the 2 nd fixed contact,

the 2 nd body part is a movable contact, and has the 1 st movable contact and the 2 nd movable contact.

15. The electromagnetic relay of claim 14 wherein,

the yoke has:

a1 st magnetic yoke disposed on a side where the 1 st movable contact is located;

a 2 nd magnetic yoke disposed on the side where the 2 nd movable contact is located; and

and a coupling part coupling the 1 st and 2 nd yokes to each other.

16. The electromagnetic relay of claim 15 wherein,

the electromagnetic relay further includes a connecting member that moves integrally with the movable contact in accordance with excitation or non-excitation of the coil,

the connecting member is disposed between the movable contact and the coupling portion.

17. The electromagnetic relay of claim 15 or 16, wherein,

the movable contact has:

a1 st side surface provided continuously with the opposing surface and the disposition surface; and

a 2 nd side surface provided continuously with the opposing surface and the disposition surface, opposite to the 1 st side surface,

the 1 st yoke has a1 st arm portion disposed on the 1 st side surface,

the 2 nd yoke has a 2 nd arm portion disposed on the 1 st side surface.

18. The electromagnetic relay of claim 17 wherein,

the yoke has a 3 rd arm portion disposed on the 2 nd side surface.

19. The electromagnetic relay according to any one of claims 14 to 18,

the end of the movable contact has a protruding portion protruding toward the 1 st or 2 nd fixed contact side terminal.

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