CN115732271A - Electromagnetic relay - Google Patents

Abstract

An electromagnetic relay (1) is provided with a case (10), a pair of fixed contact sections (410) having fixed contacts (411), and a movable contact section (420) having a pair of movable contacts (421). The fixed contact part (410) has an outer extension part (415), a terminal connection part (413), and a protrusion part (417). The projecting portion (417) has a1 st portion (4171) projecting from an end surface (415 c) of the outer extending portion (415) toward a 2 nd end side of the 3 rd shaft, and a 2 nd portion (4173) projecting toward the movable contact (421) with respect to a surface (410 a) of the fixed contact (410) on the side opposite to the movable contact (420). The protrusion (417) has a bent portion (4172) that connects the 1 st portion (4171) and the 2 nd portion (4173).

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.

Further, patent document 1 includes a pair of fixed contact portions, and the pair of fixed contact portions are arranged in a state in which the fixed contacts included in the pair of fixed contact portions are arranged in the width direction. The movable contact portion is formed to extend in the width direction, and the pair of movable contacts is provided to the movable contact portion so as to be aligned in the width direction.

Further, the movable contact portion is formed with a protruding portion protruding toward the fixed contact portion, and an arc generated when switching conduction and non-conduction between the fixed contact portion and the movable contact portion can be quickly moved from the movable contact and the fixed contact to the protruding portion. In this way, it is possible to suppress the movable contact and the fixed contact from being affected by the arc generated when the contacts are opened.

Documents of the prior art

Patent document

Patent document 1: international publication No. 18/190210

Disclosure of Invention

Although the movable contact and the fixed contact can be prevented from being affected by the arc generated when the contacts are opened by the above-described conventional technique, it is preferable that the effects can be more reliably prevented.

In order to more reliably suppress the movable contact and the fixed contact from being affected by the arc generated when the contacts are opened, it is conceivable to provide a protrusion on the fixed contact side. In addition, when such a protrusion is provided, it is conceivable that the protrusion is formed by bending the end in the width direction of the fixed contact toward the movable contact side, similarly to the protrusion on the movable contact side.

However, in the above-described conventional technique, the fixed contact and the lead terminal are connected by the terminal connection portion, and the fixed contact, the terminal connection portion, and the lead terminal are arranged so as to be aligned in a direction intersecting with the width direction. Therefore, in order to bend the end portion of the fixed contact portion in the width direction, a slit needs to be formed in the current-carrying portion between the fixed contact and the lead terminal, and the terminal cross-sectional area of the current-carrying portion is reduced.

Accordingly, an object of the present disclosure is to obtain an electromagnetic relay capable of more reliably suppressing the movable contact and the fixed contact from being affected by an arc generated when the contacts are opened while securing a terminal cross-sectional area of a current-carrying portion.

The electromagnetic relay of the present disclosure includes: a housing; a1 st fixed contact portion having a1 st fixed contact; a 2 nd fixed contact point portion having a 2 nd fixed contact point; a movable contact point portion having a1 st movable contact point opposed to the 1 st fixed contact point in a front-rear direction and a 2 nd movable contact point opposed to the 2 nd fixed contact point in the front-rear direction; a1 st lead-out terminal connected to the 1 st fixed contact portion and led out of the housing; a 2 nd lead-out terminal connected to the 2 nd fixed contact portion and led out to the outside of the housing; and a driving unit that brings the 1 st movable contact into and out of contact with the 1 st fixed contact and brings the 2 nd movable contact into and out of contact with the 2 nd fixed contact. The 1 st movable contact point portion extends along a direction in which the 1 st fixed contact point and the 2 nd fixed contact point are arranged, and the 1 st fixed contact point portion includes: a main body portion provided with the 1 st fixed contact; an outer extension portion extending from the main body portion toward a side opposite to the 2 nd fixed contact; a terminal connection portion for connecting a lower end of the outer extension portion and the 1 st lead-out terminal; and a protruding portion coupled to the outer extension portion, the protruding portion including: a1 st portion projecting upward from the outer extension; a 2 nd portion located between the outer extension portion and the 1 st movable contact when viewed from above; and a bent portion connecting the 1 st portion and the 2 nd portion.

Drawings

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

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

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

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

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

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

Fig. 7 is an exploded perspective view of a member other than a cover of the electromagnetic relay according to the embodiment, as viewed obliquely from above at 2 nd.

Fig. 8 is an exploded perspective view of an electromagnet device provided in an electromagnetic relay according to an embodiment, 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 the first embodiment, 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 the embodiment, as viewed obliquely from above at 2 nd.

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

Fig. 12 is a view showing contact and separation between the contact portion and the auxiliary contact portion according to the embodiment, and is a perspective view showing a state where the contact portion and the auxiliary contact portion are at the 2 nd position.

Fig. 13 is a diagram showing contact and separation of the contact portion and the auxiliary contact portion according to the embodiment, and is a perspective view showing a state where the contact portion and the auxiliary contact portion are at the 1 st position.

Fig. 14 is a diagram showing contact and separation between the contact portion and the auxiliary contact portion according to the embodiment, and is a vertical sectional view showing a state where the contact portion and the auxiliary contact portion are at the 2 nd position.

Fig. 15 is a diagram showing contact and separation between the contact portion and the auxiliary contact portion according to the embodiment, and is a vertical sectional view showing a state where the contact portion and the auxiliary contact portion are at the 1 st position.

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

Fig. 17 is a reverse view showing a cover according to an embodiment.

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

Fig. 19 is a perspective view of the fixed contact portion according to the first embodiment, as viewed obliquely from above at 2 nd angle.

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

Fig. 21 is a rear view showing a fixed contact portion according to an embodiment.

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

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

Fig. 24 is a perspective view of the movable contact according to the embodiment viewed obliquely from the 1 st upper side before the yoke is attached to the movable contact.

Fig. 25 is a perspective view of the movable contact according to the embodiment viewed from obliquely above at 2 nd position before the yoke is attached.

Fig. 26 is a side view showing a state before a yoke is attached to a movable contact according to an embodiment.

Fig. 27 is a plan view showing a state where a yoke is attached to a movable contact according to an embodiment.

Fig. 28 is a back view showing a state where a yoke is attached to a movable contact according to an embodiment.

Fig. 29 is a front view showing a state where a yoke is attached to a movable contact according to an embodiment.

Fig. 30 is a rear view showing a state where a yoke is attached to a movable contact according to an embodiment.

Fig. 31 is a side view showing a state where a yoke is attached to a movable contact according to an embodiment.

Fig. 32 is a diagram for explaining magnetic fluxes generated when a current flows in one direction through the movable contact according to the embodiment.

Fig. 33 is a diagram for explaining magnetic fluxes generated when a current flows in the other direction through the movable contact according to the embodiment.

Fig. 34 is a diagram illustrating a fixed contact portion, a movable contact, and a yoke according to an embodiment, and is a plan view illustrating a state in which a contact is at a1 st position.

Fig. 35 is a diagram showing a fixed contact portion, a movable contact, and a yoke according to an embodiment, and is a plan view showing a state where a contact is at a 2 nd position.

Fig. 36 is a diagram for explaining a state in which an arc moves toward a protruding portion in the electromagnetic relay according to the embodiment.

Fig. 37 is a diagram for explaining a state where an arc moves toward a projection in the electromagnetic relay according to modification 1.

Fig. 38 is a perspective view of the fixed contact portion of modification 2 as viewed from obliquely above 1 st.

Fig. 39 is a perspective view of the fixed contact part of modification 2 as viewed obliquely from above at 2 nd angle.

Fig. 40 is a front view showing a fixed contact portion of modification 2.

Fig. 41 is a rear view showing a fixed contact part according to modification 2.

Fig. 42 is a side view showing a fixed contact portion of modification 2.

Fig. 43 is a plan view showing a fixed contact portion according to modification 2.

Fig. 44 is a perspective view of the contact portion of modification 2 as viewed obliquely from the 1 st upward side.

Fig. 45 is a perspective view of the fixed contact portion of modification 3 as viewed from obliquely above 1 st.

Fig. 46 is a perspective view of the fixed contact portion of modification 3 as viewed obliquely from above at 2 nd.

Fig. 47 is a front view showing a fixed contact portion of modification 3.

Fig. 48 is a rear view showing a fixed contact portion of modification 3.

Fig. 49 is a side view showing a fixed contact portion of modification 3.

Fig. 50 is a plan view showing a fixed contact portion according to modification 3.

Fig. 51 is a perspective view of the contact portion of modification 3 as viewed from obliquely above 1 st.

Description of the reference numerals

1. An electromagnetic relay; 10. a housing; 20. an electromagnet device (drive section); 410. a fixed contact part; 410a, a front surface (a surface on the side opposite to the movable contact portion); 411. a fixed contact; 412. a main body part; 413. a terminal connection portion; 414. a lead-out terminal; 415. an outer extension; 415a, a front face; 415b, back side; 415c, an upper surface; 4151. an end portion; 4152. a notch; 416. an inner extension; 416a, front side; 416b, the back; 4161. an end portion; 417. a protrusion; 417a, an inner end; 4171. position 1; 4172. a bending section; 4172a, curved top; 4173. position 2; 4173a, top; 4174. a tapered portion; 420. a movable contact part; 421. a movable contact; 4224. a movable side protrusion; w1, width of the bend; l1, the length connecting the top of the bend and the top of the 2 nd part; x, front-back axis (X axis); y, wide axis (Y axis); z, upper and lower axis (Z axis).

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.

The direction in which the pair of fixed contacts 411 are arranged will be described with reference to any one of the "Y axis", "width axis", and "longitudinal direction of the movable contact". Further, an axis intersecting the Y axis is described using any of "X axis", "front-rear axis", and "direction in which the fixed contact and the movable contact oppose". Further, an axis intersecting the Y axis and the X axis is described using either of the "Z axis" and the "up-down 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 wide axis (direction extending along the Y axis) becomes a front-rear axis (direction extending along the X axis), and an axis orthogonal to the wide axis (direction extending along the Y axis) and the front-rear axis (direction extending along the X axis) becomes a vertical axis (direction extending along the Z 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 on which the fixed contacts are disposed is defined as the front side on the front-rear axis, and the side on which the movable contacts are disposed is defined as the rear side on the front-rear axis.

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 actually used may be different from the direction of the electromagnetic relay 1 described in the present disclosure.

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 of the front-rear axis (X axis) in the internal space S1 of the housing 10, and a contact point unit 40 is disposed forward of the front-rear axis (X axis). The auxiliary contact 60 is disposed rearward of the front-rear axis (X axis) and above the up-down axis (Z axis) (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 (Z 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 along the wide axis in the front and rear surfaces of the peripheral wall 112 above the step portion.

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 substantially rectangular plate-shaped top wall 121 extending along a substantially horizontal plane, and a peripheral wall 122 extending downward from the periphery of the top wall 121 in the vertical direction (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 insertion 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) at the lower portions of the front wall 1221 and the rear wall 1222 (provided in a line along the wide axis).

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 1 st side wall 131 in the width direction 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).

In this way, 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, which will be 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 or 6241a of the auxiliary contact portion 60, which will be described later, is press-fitted. Further, 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 223 is formed to be wider at the rear end side than at the front end side of the front-rear axis, and the lower auxiliary contact holding portions 2231 are formed at both ends of the wide axis 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 (a state viewed along the Y axis). That is, the yoke 240 includes a vertical wall portion (rising 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 a pair of coil terminal holding grooves 223a formed in the pair of extended 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 facing the head portion 232 of the core 230 along the vertical axis, and a vertical wall portion 312 extending 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 about a portion supported by the yoke 240 along the vertical axis.

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 the protrusion (extension) 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, the coil 210 is energized to attract the head 232 of the core 230 to the horizontal wall 311 of the armature 310, and the armature 310 is rotated so that the horizontal wall 311 approaches the head 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 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 contact 422 having the movable contact 421.

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 (have contacts that are in contact with and separated from 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 portions 410 and one movable contact portion 420.

Specifically, two fixed contact portions 410 having a shape symmetrical with respect 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 the present embodiment, a predetermined member 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 to bring movable contact 421 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 (on the 1 st end side) with respect to 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, an insertion hole 115 penetrating vertically is formed in the base 110. Then, the tip (connecting portion: lower end) of the lead terminal 414 is inserted into the insertion 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 410 is fixed to base 110 (housing 10) with the tip (connecting portion: lower end) of lead terminal 414 projecting downward (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, fixed contact 410 is fixed to base 110 (housing 10) with fixed contact 411 facing rearward in 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 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. Also, one of the two main body portions 412 has one fixed contact 411, and the other main body portion has the other fixed contact 411.

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

In the present embodiment, a predetermined member to be a movable contact is inserted into through-holes 422a formed on both sides in the longitudinal direction of a 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 for holding 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 so that the movable contact 421 formed on the 2 nd end of the wide axis and the fixed contact 411 of the fixed contact portion 410 disposed on the 2 nd end of the wide axis face each other along the front-rear axis. Thus, one movable contact 421 is brought into contact with and separated from one of the two fixed contacts 411, and the other movable contact 421 is brought into contact with and separated from the other fixed contact 411. Further, one movable contact 422 has two movable contact points 421.

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 forward/backward axis in accordance with the swinging of the armature 310, the movable contact portion 420 swings along the forward/backward 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 an insertion hole 511 into which the vertical wall portion 312 of the armature 310 is inserted and held is formed in an upper portion thereof. The movable portion 50 includes a movable plate 52 provided continuously to a lower portion of the holding portion 51, and a movable spring 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 an unillustrated insertion hole formed in the lower end of the holding portion 51, the movable plate 52 is held by the holding portion 51 by inserting a projection formed in the unillustrated insertion hole of the holding portion 51 into the through hole 521.

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. 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 unit 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 extends in the axial direction along the vertical axis and the tip (connection piece) 251 of the coil terminal 250 is positioned on the lower side (1 st end side) with respect to the coil 210.

The auxiliary contact unit 60 includes an auxiliary fixed contact unit 610 and an auxiliary movable contact unit 620, and the auxiliary fixed contact unit 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 point 611 is formed in one auxiliary fixed contact point portion 610, and only one auxiliary movable contact point 621 that is in contact with and separated from one auxiliary fixed contact point 611 is formed in one auxiliary movable contact point portion 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. The upper piece 613 is formed with an auxiliary fixed contact 611. 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 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 to the bobbin 220 disposed 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 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. A connecting piece 615 is connected to the lower end of the 2 nd side piece 6143 so as to protrude downward (outward) from the case 10. In the present embodiment, the leading end 6151 of the connection piece 615 is positioned below the coil 210 in the vertical axis (1 st end side).

As described above, 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 shape as viewed along the wide 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 inward of the wide axis is provided at the lower end of the 2 nd side piece 6143 on the front end side of the front-rear axis. 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 portion 610 is held in the bobbin 220 in a state where 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 wide 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. 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 pinning the plate spring 6232 can also function as the auxiliary movable contact. Further, by providing a structure in which the auxiliary movable contact 621 is brought into contact with a part of the flat surface of the plate spring 6232, the part of the flat surface of the plate spring 6232 can be caused to function as the auxiliary movable contact. In addition, a plurality of auxiliary movable contacts 621 may be provided in the plate spring 6232 (upper piece 623: the 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. The plate spring 6232 and the body portion 6231 are provided continuously 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 continuous with an outer end of the body 6231 (upper piece 623) in the width axis, 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.

The side piece 624 includes a1 st side piece 6241 provided continuously with the outer end of the wide axis of the body portion 6231 (the upper piece 623), and a coupling portion 6242 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. A 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 2 nd 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 along the vertical axis relative to the auxiliary fixed contact portion 610. 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 of the auxiliary fixed contact 610 and the auxiliary movable contact 620 that are paired with each other (have auxiliary contacts that are in contact with and separated from each other) can be switched.

In the present embodiment, the auxiliary drive 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. In this way, the plate spring 6232 is swung along the vertical axis in accordance with the swing of the auxiliary driving unit 70 along the vertical axis.

The auxiliary drive portion 70 includes a main body portion 71 and a fixing portion 72 continuously provided and held on a horizontal wall portion 311 of the armature 310 so as to project from the main body portion 71 toward the outside of the wide axis. The auxiliary drive unit 70 includes an upward pressing portion 73 that is provided continuously so as to protrude from the body 71 toward the rear side of the front-rear axis and presses the leaf 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 auxiliary driving unit 70 is held by the horizontal wall portion 311 of the armature 310 by hooking the pair of hook portions 722 to the held portion 3112.

In this way, in the present embodiment, the auxiliary driving unit 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 620 swings relative to the auxiliary fixed contact 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 axis 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 the coil 210 is stopped, the push-up portion 73 of the auxiliary driving portion 70 is pushed up by the contact with the plate spring 6232, and the auxiliary movable contact 621 comes into contact with the 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 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 portion 232 of the core 230 against the elastic force of the hinge spring 320. Then, the vertical wall portion 312 rotates forward as the horizontal wall portion 311 rotates downward (toward the core 230), and the movable portion 50 rotates forward as the vertical wall portion 312 rotates forward. 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).

When the coil 210 is stopped from being energized in this state, 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 pressed up by the pressing 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 armature 310 is at the contact position, movable contact 421 comes into contact with fixed contact 411, and auxiliary movable contact 621 and auxiliary fixed contact 611 are at position 1 (see fig. 13 and 15) where they are separated from each other.

Therefore, the pair of fixed contact portions 410, 410 are insulated from each other while the coil 210 is not energized, and the pair of fixed contact portions 410, 410 are energized 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. 32, when a current I flows from the movable contact 421 on the left side (near side of the movable contact part 420 shown in fig. 32) to the movable contact 421 on the right side (far side of the movable contact part 420 shown in fig. 32), a magnetic flux B is generated from above to below on the 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 the 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. 34 to the state of fig. 35).

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. 35).

At this time, when a current I flows from the right movable contact 421 to the left movable contact 421 in fig. 35 (when a current I flows in the same direction as in fig. 32), the current I from the movable contact 421 to the fixed contact 411 flows through the arc a generated between the left movable contact 421 and the fixed contact 411 in fig. 35.

On the other hand, the current I from the fixed contact 411 toward the movable contact 421 flows through the arc a generated between the movable contact 421 and the fixed contact 411 on the right side in fig. 35.

As described above, the magnetic flux B is generated from above to 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. 35 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. 35 is pulled to the left side (outside of the Y axis) of fig. 35.

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. 35 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 of fig. 35 is pulled to the right side (outside of the Y axis) of fig. 35.

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. 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. 35 (when a current I flows in the same direction as in fig. 33), 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. 35.

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. 35.

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. 35 is acted on the 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. 35 is pulled to the left side of fig. 35 (outside of the Y axis).

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. 35 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 of fig. 35 is pulled to the right side (outside of the Y axis) of fig. 35.

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.

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 (alternating current) relay, the arc a generated between the movable contact 421 and the fixed contact 411 can be drawn outward in the Y axis 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 side wall 131 provided continuously with the base 110 so as to extend along the up-down axis on the front side of the front-rear axis of the coil 210 (the 1 st end side of the 2 nd axis).

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 (the 2 nd end side of the 2 nd 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 wall 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 so 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. Moreover, 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 is displaced during the swing or the powder consumed at the contact portion 40 or the like enters 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 is extended along the wide axis and is opposed to the armature 310 in the up-down direction (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, it is possible to more reliably suppress the entry of the consumable powder and the like generated in the contact portion 40 into the auxiliary contact side space S3 by the pressing wall 1341.

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 side wall 135, and the 5 th side wall 135 extends along the vertical axis and is provided on the housing 120 so as to be disposed outside the 2 nd side wall 132 in the width 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 yoke 80 is disposed on at least one member side of the body 412 and the movable contact 422.

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

Here, in the present embodiment, as shown in fig. 24 to 31, the magnetic 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.

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

In the present embodiment, the yoke 80 includes a substantially rectangular side wall 81 elongated on the Y axis and a top wall 82 provided continuously to an upper end of the side wall 81.

The front surface 81a of the side wall 81 is disposed so as to face the rear surface 4222 of the movable contact 422 in a state where the distal end 82b of the top wall 82 faces forward of the front-rear axis.

Therefore, in the present embodiment, the side wall 81 of the yoke 80 is disposed on the surface 4222 of the movable contact 422 on the side 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 the contact (movable contact 421) of the member (movable contact 422) on the side where the yoke 80 is disposed, when viewed along the X axis (when viewed along the direction in which the fixed contact 411 and the movable contact 421 move relative to each other).

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.

In the present embodiment, the yoke 80 is fixed to the movable contact (the member on the side where the yoke 80 is arranged) 422. Specifically, a through hole 80b is formed in the side wall 81 of the yoke 80, and the yoke 80 is fixed to the movable contact 422 by inserting the protrusion 422b of the movable contact 422 into the through hole 80 b. The yoke 80 may be fixed to the movable contact 422 by caulking, soldering, an adhesive, or the like.

By fixing the yoke 80 to the movable contact 422, the lower surface 82a of the top wall 82 is brought into surface contact with the upper surface 4223 of the movable contact 422. At this time, the distal end 82b of the top wall 82 projects forward (outward) of the front surface 4221 of the movable contact 422.

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.

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 the 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 facing the movable contact 420) 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 protruding portion 417 can be formed by, for example, bending an upper portion of a plate-like member protruding 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.

In this way, in the present embodiment, a vertically bent protruding portion 417 is formed at a portion of the fixed contact portion 410 that is offset from the current-carrying portion (the portion where current flows between the lead terminal 414 and the fixed contact 411). A protrusion 417 is formed on the outer side 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 current-carrying portion of the fixed contact portion 410. Specifically, the fixed contact 410 is formed with a projection 417 at a position 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 projecting 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 exist between the outer end 417b of the wide axis of the protruding portion 417 and the fixed contact 411. That is, as shown in fig. 23, the terminal connection part 413 exists between the protruding part 417 and the fixed contact 411 when viewed from above.

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, if 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 portion 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 conducting portion is ensured.

In the present embodiment, 1 st portion 4171 and 2 nd portion 4173 are coupled by 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 protruding portion 417 is formed by bending a plate 180 degrees, the amount of protrusion of the protruding portion 417 to the rear of the front-rear axis can be determined by setting the plate thickness, and therefore the amount of protrusion of the protruding portion 417 can be more easily controlled.

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, the protruding portion 417 is formed such that the upper and lower positions of the 2 nd portion 4173 and the 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 of the tensile arc a, 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 protrusion 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 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 protrusion 116a protruding 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 protrusion 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 portion 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 the present embodiment, front surface 416a corresponds to a rear surface of inner extension portion 416, and rear surface 416b corresponds to a front surface of inner extension portion 416. Front surface 415a corresponds to a surface behind outer extension 415, and rear surface 415b corresponds to a surface in front of outer extension 415.

In this way, the positioning accuracy of the fixed contact portion 410 with respect to the housing 10 can be further improved. In this way, 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, the movable-side protrusion 4224 protruding toward the body 412 is formed at the end of the wide shaft of the movable contact 422.

In the present embodiment, the movable-side protrusion 4224 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 4224 is formed such that the tip 4224a of the movable-side protrusion 4224 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 4224 is located inward of the protrusion 417 in the width axis direction (see fig. 34).

When the arc a is generated between the movable contact 421 and the fixed contact 411, the main body 412 and the movable contact 422 have the above-described shapes, so that the arc starting point (discharge point) A1 of the arc a moves toward the protruding portion 417 and the movable-side protruding portion 4224 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 4224 is located inward of the protrusion 417 in the Y axis direction, the arc a moving to the protrusion 417 side and the movable-side protrusion 4224 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. 36, 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 4224.

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. 37, the movable-side protrusion 4224 may be located outward of the protrusion 417 in the Y axis.

For example, in a state where the body portion 412 and the movable contact 422 are housed in the housing 10, 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 4224, it is preferable to adopt a configuration shown in fig. 37.

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 projection 417 is not limited to the shape described in the above embodiment, and various shapes can be adopted.

For example, the fixed contact portion 410 shown in fig. 38 to 44 can be used.

In fixed contact 410 shown in fig. 38 to 44, a plate projecting upward from upper surface (end surface) 415c of outer extending portion 415 is bent 180 degrees to form projecting portion 417.

In addition, a tapered portion 4174 whose width is narrowed toward the tip (lower end) (i.e., narrowed along the Y axis) is formed in the 2 nd portion 4173. That is, by adopting such a configuration as viewed from the front, it is possible to secure a contact gap (a distance required for further maintaining insulation properties when the contacts are opened) between the fixed contact portion 410 and the movable contact portion 420 while achieving downsizing of the device.

The fixed contact portion 410 shown in fig. 45 to 51 may be used.

In fixed contact 410 shown in fig. 45 to 51, projecting portion 417 is formed by bending a plate projecting upward from upper surface (end surface) 415c of outer extending portion 415 by 90 degrees. At this time, the tip 4173a of the 2 nd portion 4173 is positioned rearward (movable contact 422 side) of the tip (top) 411a of the fixed contact 411.

Further, the notch 4152 is formed at a position inside the 1 st portion 4171 in the outer extension 415 with respect to the width axis so that the lower end is substantially at the same position as the center portion of the vertical axis of the fixed contact 411. Thus, the 1 st portion 4171 and the fixed contact 411 are arranged along the wide axis. Since the 1 st portion 4171 and the fixed contact 411 can be located at substantially the same position above and below each other, the 2 nd portion 4173 and the fixed contact 411 can be opposed to each other along the wide axis, which is the direction in which the arc a is drawn, without bending the plate serving as the portion of the projection 417 by 180 degrees.

The 2 nd portion 4173 formed by bending the plate by 90 degrees is arranged along the wide axis with the fixed contact 411. That is, the protruding portion 417 is formed such that the upper and lower positions of the 2 nd portion 4173 and the fixed contact 411 are substantially the same. Thus, the 2 nd portion 4173 is opposed to the fixed contact 411 along the direction of the tensile arc a, 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 protrusion 417.

In the fixed contact portion 410 shown in fig. 45 to 51, the side of the 2 nd portion 4173 closer to the fixed contact 411 can be inclined so that the inner side of the wide axis (fixed contact portion side) becomes the upper side of the vertical axis, as viewed along the front-rear axis.

[ action, effect ]

Hereinafter, the characteristic structure of the electromagnetic relay shown in the above-described embodiment and its modified examples and the effects obtained thereby will be described.

(1) The electromagnetic relay 1 shown in the above embodiment and its modified examples includes: a housing 10; a fixed contact portion 410 having a fixed contact 411; another fixed contact portion 410 having another fixed contact 411; a movable contact point part 420 having one movable contact point 421 opposing one fixed contact point 411 in the front-rear direction and the other movable contact point 421 opposing the other fixed contact point 411 in the front-rear direction; a lead-out terminal 414 connected to one of the fixed contact portions 410 and led out to the outside of the housing 10; another lead-out terminal 414 connected to the other fixed contact portion 410 and led out to the outside of the housing 10; and an electromagnet device (driving portion) 20 that brings one movable contact 421 into and out of contact with one fixed contact 411 and brings the other movable contact 421 into and out of contact with the other fixed contact 411. The movable contact portion 420 extends along a direction in which the one fixed contact 411 and the other fixed contact 411 are arranged. One fixed contact portion 410 has: a main body part 412 provided with one fixed contact 411; an outer extension 415 extending from the body 412 toward the opposite side of the other fixed contact 411; a terminal connection part 413 for connecting the lower end of the outer extension part 415 to one lead-out terminal 414; and a protrusion 417 coupled to outer extension 415. The protrusion 417 has: a1 st portion 4171 projecting upward from the outer extension 415; a 2 nd portion 4173 located between outer extending portion 415 and movable contact 421 when viewed from above; and a bent portion 4172 connecting the 1 st portion 4171 and the 2 nd portion 4173.

In this way, in the electromagnetic relay 1 shown in the above-described embodiment and the modification thereof, the fixed contact portion 410 is formed in a shape bent vertically at a portion deviated from the current-carrying portion (the portion through which current flows between the lead terminal 414 and the fixed contact 411). The vertically bent shape is a protrusion 417. In this way, the projecting portion 417 is formed in the vicinity of the outer side between the pair of 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.

Further, with such a configuration, it is not necessary to provide a notch in the current-carrying portion of the fixed contact portion 410, as in the case where the protruding portions are formed on both sides of the wide axis of the fixed contact portion 410. Therefore, 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).

Thus, according to the above-described embodiment and the modifications thereof, it is possible to obtain the electromagnetic relay 1 capable of more reliably suppressing the movable contact 421 and the fixed contact 411 from being affected by the arc a generated when the contacts are opened while securing the terminal cross-sectional area of the current-carrying portion.

In addition, such an effect is more remarkable in the case of an electromagnetic relay through which a large current flows. This is because, in order to provide an electromagnetic relay through which a large current flows, the thickness of the fixed contact portion 410 needs to be increased, and if the thickness is increased, a larger notch needs to be provided for bending the plate.

(2) Preferably, bent portion 4172 has a U-shape, and 2 nd portion 4173 and outer extension portion 415 face each other in the front-rear direction.

In this way, the projection 417 can be formed simply by bending the plate 180 degrees, and the projection 417 can be easily formed. Further, if the 1 st part 4171 and the 2 nd part 4173 are coupled by the U-shaped bent portion 4172, the protruding portion 417 can be made closer to the fixed contact 411 more easily. 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 protrusion 417.

(3) Further, it is preferable that the width W1 of the bent portion 4172 is smaller than the length L1 from the upper end to the lower end of the protruding portion 417 when viewed from the front.

In this way, since the plate that becomes the portion of the protruding portion 417 can be bent more easily, the protruding portion 417 can be formed more easily.

(4) Further, it is preferable that the 2 nd site 4173 and the fixed contact 411 are arranged along a direction in which one fixed contact 411 and the other fixed contact 411 are arranged, as viewed in the front-rear direction.

In this way, the upper and lower positions of 2 nd portion 4173 and fixed contact 411 can be set to substantially the same position. That is, the 2 nd portion 4173 and the fixed contact 411 can be opposed to each other along the direction of the tensile arc a, i.e., the wide axis. As a result, 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 protrusion 417.

(5) Further, it is preferable that the 1 st site 4171 and the fixed contact 411 are arranged along a direction in which the one fixed contact 411 and the other fixed contact 411 are arranged, as viewed in the front-rear direction.

In this way, the upper and lower positions of the 1 st portion 4171 and the fixed contact 411 can be set to substantially the same position. Therefore, even if the plate at the portion to be the protrusion 417 is not bent by 180 degrees, the 2 nd portion 4173 and the fixed contact 411 can be opposed to each other along the wide axis which is the direction in which the arc a is pulled. Therefore, 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 protrusion 417.

(6) Further, it is preferable that the fixed contact portion 410 has a notch 4152 formed between the 1 st portion 4171 and the body portion 412.

Thus, the material for forming the fixed contact portion 410 can be reduced, and the weight and cost of the device can be reduced. Further, by forming the notch 4152 in the outer extension portion 415 at a position inside the wide axis from the 1 st portion 4171, even when the plate serving as the projecting portion 417 is bent by 90 degrees, the 2 nd portion 4173 and the fixed contact 411 can be opposed to each other along the wide axis in the direction in which the arc a is pulled. Therefore, 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.

(7) In addition, it is preferable that the terminal connection part 413 exists between the protrusion part 417 and the fixed contact 411 when viewed from above.

In this way, the terminal cross-sectional area of the current-carrying portion of the fixed contact portion 410 can be increased, and heat generation due to a large current can be more reliably suppressed.

(8) Further, the movable contact part 420 preferably has movable side protrusions 4224 protruding from both ends toward the fixed contact part 410.

In this way, it is possible to more reliably suppress the movable contact 421 and the fixed contact 411 from being affected by the arc a generated when the contacts are opened.

(9) Further, when viewed in the front-rear direction, the 2 nd portion 4173 preferably includes a tapered portion 4174 whose width decreases downward.

In this way, the contact gap (distance required to maintain insulation when the contacts are opened) between the fixed contact portion 410 and the movable contact portion 420 can be ensured while downsizing the device.

(10) Preferably, the one fixed contact portion 410 further includes an inner extension portion 416 extending from the body portion 412 toward the other fixed contact 411, the inner extension portion 416 and the one movable contact portion 420 are opposed to each other in the front-rear direction, a rear surface 416b of the end portion 4161 of the inner extension portion 416 and a front surface 416a of the end portion of the inner extension portion 416 are in contact with the housing 10, respectively, and a rear surface 415b of the end portion 4151 of the outer extension portion 415 and a front surface 415a of the end portion 4151 of the outer extension portion 415 are in contact with the housing 10, respectively.

In this way, the positioning accuracy of the fixed contact 410 with respect to the housing 10 can be further improved. Therefore, 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.

[ 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 embodiment and the modifications thereof can be combined as appropriate.

In the above-described embodiment and the modifications thereof, the case where the auxiliary contact portion 60 is in the open state when the contact portion 40 is in the closed state is exemplified, but the auxiliary contact portion 60 may also 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 the above-described embodiment and the modifications thereof, the electromagnetic relay 1 including the auxiliary contact 60 is exemplified, but the electromagnetic relay 1 not including the auxiliary contact 60 may be adopted.

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

Claims (10)

1. An electromagnetic relay, wherein,

the electromagnetic relay includes:

a housing;

a1 st fixed contact portion having a1 st fixed contact;

a 2 nd fixed contact point portion having a 2 nd fixed contact point;

a movable contact point portion having a1 st movable contact point opposed to the 1 st fixed contact point in a front-rear direction and a 2 nd movable contact point opposed to the 2 nd fixed contact point in the front-rear direction;

a1 st lead-out terminal connected to the 1 st fixed contact portion and led out of the housing;

a 2 nd lead-out terminal connected to the 2 nd fixed contact portion and led out to the outside of the housing; and

a drive unit that brings the 1 st movable contact into and out of contact with the 1 st fixed contact and brings the 2 nd movable contact into and out of contact with the 2 nd fixed contact,

the movable contact portion extends in a direction in which the 1 st fixed contact and the 2 nd fixed contact are arranged,

the 1 st fixed contact part includes:

a main body portion provided with the 1 st fixed contact;

an outer extension portion extending from the main body portion toward a side opposite to the 2 nd fixed contact;

a terminal connection portion for connecting a lower end of the outer extension portion and the 1 st lead-out terminal; and

a protruding portion connected to the outer extension portion,

the protruding portion has:

a1 st portion projecting upward from the outer extension;

a 2 nd portion located between the outer extension portion and the 1 st movable contact when viewed from above; and

a bent portion connecting the 1 st portion and the 2 nd portion.

2. The electromagnetic relay of claim 1,

the bending part is in a U-shaped shape,

the 2 nd portion is opposed to the outer extension portion in the front-rear direction.

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

the width of the bent portion is smaller than the length from the upper end to the lower end of the protruding portion when viewed from the front.

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

the 2 nd site and the 1 st fixed contact are arranged along the direction in which the 1 st fixed contact and the 2 nd fixed contact are arranged, when viewed in the front-rear direction.

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

the 1 st site and the 1 st fixed contact are arranged along the direction in which the 1 st fixed contact and the 2 nd fixed contact are arranged, as viewed in the front-rear direction.

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

the 1 st fixed contact part is formed with a gap between the 1 st site and the main body part.

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

the terminal connecting portion exists between the protruding portion and the 1 st fixed contact when viewed from above.

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

the movable contact portion has movable side protruding portions protruding from both ends toward the 1 st fixed contact portion side.

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

the 2 nd portion includes a tapered portion whose width is narrowed downward when viewed in the front-rear direction.

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

the 1 st fixed contact portion further has an inner extension portion extending from the main body portion toward the 2 nd fixed contact,

the inner extension part is opposite to the 1 st movable contact part in the front-rear direction,

a surface in front of an end of the inner extension and a surface behind the end of the inner extension are in contact with the housing,

a front surface of an end of the outer extension and a rear surface of the end of the outer extension are in contact with the housing, respectively.

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