阅读说明：本技术 电磁体装置 (Electromagnet device ) 是由 东芳宽 田尻义和 于 2020-01-29 设计创作，主要内容包括：电磁体装置具备：卷线筒,其具有在内部设置有贯通孔的筒状的主体部；线圈,其绕主体部卷绕；铁芯,其配置于主体部的贯通孔；板状的轭部,其具有与铁芯连接的第一部件、和从第一部件起沿着线圈的外周面延伸的第二部件；以及板状的可动铁片,其在中间具有弯曲部。轭部具有设置于第二部件的自由端的中间的至少1个定位突起,可动铁片具有定位凹部,该定位凹部设置于弯曲部的一对旋转支点的中间,收纳定位突起而进行定位。(The electromagnet device is provided with: a spool having a cylindrical body portion with a through hole formed therein; a coil wound around the main body; an iron core disposed in the through hole of the main body; a plate-shaped yoke portion having a first member connected to the core and a second member extending from the first member along an outer peripheral surface of the coil; and a plate-shaped movable iron piece having a bent portion in the middle. The yoke portion has at least 1 positioning protrusion provided in the middle of the free end of the second member, and the movable iron piece has a positioning recess provided in the middle of the pair of rotation fulcrums of the bending portion, and the positioning recess accommodates and positions the positioning protrusion.)

1. An electromagnet device supplied with an alternating current, wherein,

the electromagnet device is provided with:

a spool having a cylindrical body portion provided therein with a through hole extending in a first direction;

a coil wound around the body portion in the first direction and through which the alternating current flows;

a core disposed in the through hole of the body, both ends of the core in the first direction being exposed to the outside of the bobbin, and an adsorption portion being provided at one end of the core in the first direction;

a plate-shaped yoke portion having a first member connected to the other end of the core in the first direction and a second member extending from the first member toward the suction portion of the core along an outer peripheral surface of the coil; and

a plate-shaped movable iron piece having a bent portion in the middle thereof, the movable iron piece being disposed at a free end of the second member of the yoke portion on a suction portion side of the core so as to be rotatable via a pair of rotation fulcrums provided at both ends of the bent portion in a second direction intersecting the first direction and a thickness direction of the second member, and having a sucked portion sucked by the suction portion of the core when the coil is excited,

the yoke portion has at least 1 positioning protrusion provided midway in the second direction of the free end of the second member, extending in the first direction in a direction away from the first member,

the movable iron piece has a positioning recess provided in the middle of the pair of rotation fulcrums of the bending portion, and receives and positions the positioning protrusion.

2. The electromagnet apparatus of claim 1,

the electromagnet device further includes a leaf spring that biases the movable iron piece toward the second member of the yoke at a point intermediate the pair of rotation fulcrums, and rotatably connects the movable iron piece to the yoke.

3. The electromagnet apparatus of claim 2,

the plate spring biases the movable iron piece toward the second member of the yoke at a point at the center of the second direction.

4. The electromagnet apparatus of claim 1,

the electromagnet device further includes a leaf spring that biases the movable iron piece toward the second member of the yoke at each of the pair of rotation support points, and rotatably connects the movable iron piece to the yoke.

5. The electromagnet apparatus of any one of claims 2 to 4,

the yoke, the movable iron piece, and the plate spring each have a shape symmetrical in the second direction.

Technical Field

The present disclosure relates to an electromagnet device supplied with an alternating current.

Background

Patent document 1 describes an electromagnet device of an electromagnetic relay excited by an alternating current. In the electromagnet device, the magnetic attraction portion of the iron core that attracts the movable iron piece is provided with a notch portion, and the magnetic force per unit area of the magnetic attraction portion is increased. Thus, the movable iron piece is held in a stable state in the magnetic attraction portion of the core, and the whining sound is prevented from being generated.

Documents of the prior art

Patent document

Patent document 1: japanese Kokai publication Hei 05-11411

Disclosure of Invention

Problems to be solved by the invention

In the above electromagnet device, for example, when the iron core is inclined, the magnetic attraction portion is also inclined. Therefore, when the movable iron piece is attracted to the magnetic attraction portion of the core, a gap is formed in a portion between the movable iron piece and the magnetic attraction portion, and the attraction state of the movable iron piece to the core becomes unstable, and the whining sound may not be reliably prevented.

The present disclosure provides an electromagnet device to which an alternating current is supplied, which can more reliably prevent whining sound.

Means for solving the problems

An electromagnet device according to an example of the present disclosure is supplied with an alternating current, wherein,

the electromagnet device is provided with:

a spool having a cylindrical body portion provided therein with a through hole extending in a first direction;

a coil wound around the body portion in the first direction and through which the alternating current flows;

a core disposed in the through hole of the body, both ends of the core in the first direction being exposed to the outside of the bobbin, and an adsorption portion being provided at one end of the core in the first direction;

a plate-shaped yoke portion having a first member connected to the other end of the core in the first direction and a second member extending from the first member toward the suction portion of the core along an outer peripheral surface of the coil; and

a plate-shaped movable iron piece having a bent portion in the middle thereof, the movable iron piece being disposed at a free end of the second member of the yoke portion on a suction portion side of the core so as to be rotatable via a pair of rotation fulcrums provided at both ends of the bent portion in a second direction intersecting the first direction and a thickness direction of the second member, and having a sucked portion sucked by the suction portion of the core when the coil is excited,

the yoke portion has at least 1 positioning protrusion provided midway in the second direction of the free end of the second member, extending in the first direction in a direction away from the first member,

the movable iron piece has a positioning recess provided in the middle of the pair of rotation fulcrums of the bending portion, and receives and positions the positioning protrusion.

Effects of the invention

According to the electromagnet device, the yoke portion has at least 1 positioning protrusion provided in the middle of the free end of the second member, and the movable iron piece has a positioning recess provided in the middle of the pair of rotation fulcrums of the bending portion, and the positioning recess accommodates and positions the positioning protrusion. With this configuration, the distance between the pair of rotation fulcrums of the movable iron piece can be increased, and thus the whining sound can be more reliably prevented.

Drawings

Fig. 1 is a perspective view of an electromagnetic relay including an electromagnet device according to an embodiment of the present disclosure.

Fig. 2 is a side view of the electromagnetic relay shown in fig. 1 with a cover partially removed.

Fig. 3 is a perspective view of an electromagnet apparatus of an embodiment of the present disclosure.

Fig. 4 is a sectional view taken along line IV-IV of fig. 3.

Fig. 5 is a front view of the electromagnet arrangement of fig. 3.

Fig. 6 is a front view showing a modification of the electromagnet device of fig. 3.

Detailed Description

Hereinafter, an example of the present disclosure will be described with reference to the drawings. In the following description, terms indicating specific directions or positions (for example, terms including "up", "down", "right" and "left") are used as necessary, but these terms are used to facilitate understanding of the present disclosure with reference to the drawings, and the technical scope of the present disclosure is not limited by the meanings of these terms. The following description is merely exemplary in nature and is not intended to limit the present disclosure, applications, or uses. The drawings are schematic, and the ratio of the dimensions and the like do not always match the reality.

As shown in fig. 1, an electromagnetic relay 1 including an electromagnet device 20 according to an embodiment of the present disclosure includes a substantially rectangular parallelepiped case 10 including a base 11 and a case 12. As shown in fig. 2, the susceptor 11 has a substantially rectangular plate shape, and one surface in the thickness direction thereof constitutes an installation surface 13. The housing 12 has a substantially rectangular box shape, and is attached to the base 11 so as to cover the installation surface 13 of the base 11. The housing 10 is provided therein with a housing 14 including a mounting surface 13 of the base 11 and the case 12.

As shown in fig. 2, the electromagnet device 20 and the contact mechanism 40, which are fixed to the installation surface 13 of the base 11, are housed in the housing portion 14.

As shown in fig. 3 and 4, the electromagnet device 20 includes: an insulating bobbin 21; a coil 22 wound around the bobbin 21; an iron core 23 (shown only in fig. 4) disposed inside the bobbin 21; a yoke 24 having one end connected to the core 23; and a movable iron piece 25 rotatably disposed at the other end of the yoke 24. In this embodiment, the yoke 24 and the movable iron piece 25 are connected via a plate spring 30.

As shown in fig. 4, the spool 21 includes a cylindrical main body portion 211 extending in a first direction X intersecting (e.g., orthogonal to) the installation surface 13, and 2 flange portions 212 provided at both ends of the main body portion 211 in the first direction X. For example, the body portion 211 has a substantially cylindrical shape, and a through hole 213 extending in the first direction X is provided therein. Both ends of the through hole 213 are connected to the respective flange portions 212. That is, each flange portion 212 is provided with an opening portion 214 connected to the through hole 213.

As shown in fig. 4, the coil 22 is wound around the body portion 211 of the bobbin 21 in the first direction X. The coil terminal 26 is electrically connected to the coil 22, and an alternating current is supplied to the coil 22 through the coil terminal 26.

As shown in fig. 4, the core 23 has a substantially cylindrical shape and is disposed in the through hole 213 of the body 211 of the bobbin 21. Both ends of the core 23 in the first direction X are exposed to the outside of the bobbin 21. An attracting portion 231 for attracting an attracted portion 252 of a movable iron piece 25 described later is provided at one end of the iron core 23 in the first direction X. Further, a first member 241 of a yoke portion 24 described later is connected to the other end of the core 23 in the first direction X.

The suction portion 231 has a groove 232 provided on one end surface of the core 23 in the first direction X, and a shield coil 233 fitted in the groove 232. Of the one end surfaces of the core 23 in the first direction X, the end surface surrounded by the shield coil 233 around the first direction X is defined as a first suction surface 234, and the end surface not surrounded by the shield coil 233 around the first direction X is defined as a second suction surface 235. When an ac current is supplied to coil 22, a phase difference is generated between the magnetic flux passing through first attraction surface 234 and the magnetic flux passing through second attraction surface 235, and either one of first attraction surface 234 and second attraction surface 235 is always magnetized.

As shown in fig. 4, the yoke portion 24 has a substantially rectangular plate shape bent in an L-shape, and includes a first member 241 connected to the other end of the core 23 in the first direction X, and a second member 242 extending from the first member 241 along the outer peripheral surface of the coil 22 toward the suction portion 231 of the core 23. As shown in fig. 3, at least 1 (2 in the present embodiment) positioning protrusions 244 are provided at the free end 243 of the second member 242 (i.e., the end of the second member 242 on the side away from the first member 241 in the first direction X). When a direction intersecting (e.g., orthogonal to) the first direction X and the thickness direction Z of the second member 242 is defined as a second direction Y, the positioning projections 244 are provided at the middle of the free end 243 of the second member 242 in the second direction Y and are arranged at intervals in the second direction Y. In addition, each positioning protrusion 244 extends in the first direction X in a direction away from the first member 241.

As shown in fig. 3, the movable iron piece 25 has, as an example, a substantially L shape having a bent portion 251 extending in the second direction Y at the center thereof, and the movable iron piece 25 includes: an adsorbed portion 252 extending in the thickness direction Z of the second member 242; and a connection portion 253 extending in the first direction X. The attracted portion 252 is attracted by the attracting portion 231 of the core 23 when the ac current flows through the coil 22 and is excited. A rod-like member 255 connected to the movable member 50 (shown in fig. 2) is provided at the end of the connecting portion 253 on the side away from the bent portion 251 in the first direction X and at the center in the second direction Y. The movable iron piece 25 and the contact mechanism 40 are connected via the movable member 50.

The bending portion 251 has a pair of rotation fulcrums 254 at both ends of the second member 242, and the movable iron piece 25 is disposed at the free end 243 of the second member 242 of the yoke portion 24 so as to be rotatable via the rotation fulcrums 254. In other words, the movable iron piece 25 is disposed at the free end 243 of the second member 242 of the yoke portion 24 so as to be rotatable about the rotation axis L passing through the pair of rotation fulcrums 254.

The bending portion 251 has a positioning recess 256, and the positioning recess 256 is provided between the pair of rotation fulcrums 254, and receives the positioning projection 244 to position the bending portion in the second direction Y. In this embodiment, 2 positioning recesses 256 corresponding to the 2 positioning protrusions 244 are provided, and each positioning recess 256 is configured as a through hole penetrating the movable iron piece 25 in the plate thickness direction, as an example.

As shown in fig. 5, the plate spring 30 has a substantially rectangular shape extending in the first direction X, and an end portion of the plate spring in the first direction X on the side away from the movable iron piece 25 is fixed to the second member 242 of the yoke portion 24. The plate spring 30 has: a biasing portion 31 that biases the movable iron piece 25 toward the second member 242 of the yoke portion 24; and a through hole 32 into which the rod-like member 255 of the movable iron piece 25 is inserted. The biasing portion 31 is provided at the end of the plate spring 30 on the movable iron piece 25 side in the first direction X and at the center in the second direction Y, and is disposed between the 2 positioning recesses 256 of the movable iron piece 25. The biasing portion 31 biases the movable iron piece 25 toward the second member 242 of the yoke portion 24 at a point intermediate the pair of rotation fulcrums 254.

The yoke 24, the movable iron piece 25, and the plate spring 30 each have a shape symmetrical in the second direction Y. That is, the plate spring 30 biases the movable iron piece 25 toward the second member 242 of the yoke 24 at a point at the center in the second direction Y.

As shown in fig. 2, the contact mechanism portion 40 is disposed adjacent to the electromagnet device 20 in the longitudinal direction of the base 11 (i.e., the thickness direction Z of the second member 242 of the yoke portion 24). As an example, the contact mechanism portion 40 includes a movable contact-side terminal 41 having a substantially rectangular plate shape, and 2 fixed contact-side terminals 42 having a substantially rectangular plate shape and arranged on both sides of the movable contact-side terminal 41 in a direction perpendicular to the plate surface of the movable contact-side terminal 41. The movable contact side terminal 41 and the fixed contact side terminal 42 extend from the outside of the housing 14 to the inside of the housing 14, and are electrically and independently arranged so that the plate surfaces thereof face each other. A movable contact portion 411 is provided at an end of the movable contact side terminal 41 closer to the housing portion 14, and a fixed contact portion 421 facing the movable contact portion 411 is provided at an end of each fixed contact side terminal 42 closer to the housing portion 14.

The movable contact side terminal 41 is connected to the rod-like member 255 of the movable iron piece 25 of the electromagnet device 20 via the movable member 50 in the housing 14. The movable member 50 is driven in the longitudinal direction Z of the base 11 in accordance with excitation/non-excitation of the electromagnet device 20, and is configured to bring the movable contact portion 411 into contact with or separate from the fixed contact portion 421.

According to the electromagnet device 20, the yoke portion 24 has at least 1 positioning protrusion 244 provided in the middle of the free end 243 of the second member 242, and the movable iron piece 25 has a positioning recess 256 provided in the middle of the pair of rotation fulcrums 254 of the bent portion 251, and the positioning recess 256 accommodates and positions the positioning protrusion 244. With this configuration, the distance between the pair of rotation fulcrums 254 of the movable iron piece 25 can be increased. That is, when the attracted portion 252 of the movable iron piece 25 is attracted by the attraction portion 231 of the iron core 23, a triangle having a contact point between the attracted portion 252 of the movable iron piece 25 and the attraction portion 231 of the iron core 23 and a pair of rotation fulcrums 254 of the movable iron piece 25 as vertexes becomes large, and the attraction state of the movable iron piece 25 with respect to the iron core 23 is stable. As a result, even if the iron core 23 is inclined, a gap is generated in a portion between the attracting portion 231 of the iron core 23 and the attracted portion 252 of the movable iron piece 25, and the whining sound can be more reliably prevented.

Further, the plate spring 30 is provided, and the plate spring 30 biases the movable iron piece 25 toward the second member 242 of the yoke portion 24 at a point between the pair of rotation fulcrums 254, and rotatably connects the movable iron piece 25 to the yoke portion 24. With this configuration, the attraction state of the movable iron piece 25 to the iron core 23 can be further stabilized.

The plate spring 30 biases the movable iron piece 25 toward the second member 242 of the yoke 24 at a point at the center in the second direction Y. With this configuration, the attraction state of the movable iron piece 25 to the iron core 23 can be stabilized more reliably.

The yoke 24, the movable iron piece 25, and the plate spring 30 each have a shape symmetrical in the second direction. With this configuration, the attraction state of the movable iron piece 25 to the iron core 23 can be stabilized more reliably.

The plate spring 30 is not limited to the case where the movable iron piece 25 is biased toward the second member 242 of the yoke 24 at one point between the pair of rotation fulcrums 254. For example, as shown in fig. 6, the plate spring 30 may be configured to bias the movable iron piece 25 toward the second member 242 of the yoke portion 24 at each of the pair of rotation fulcrums 254. The plate spring 30 of fig. 6 has 2 biasing portions 31 provided at both ends in the second direction Y at the end portion of the plate spring 30 on the movable iron piece 25 side in the first direction X. With this configuration, the movable iron piece 25 can be more reliably connected to the second member 242 of the yoke portion 24. That is, the reliability of the connection between the yoke portion 24 and the movable iron piece 25 can be improved.

The plate spring 30 may be configured to bias the movable iron piece 25 toward the second member 242 of the yoke 24 at a point between the pair of rotation fulcrums 254, and is not limited to a case where the movable iron piece 25 is biased toward the second member 242 of the yoke 24 at a point in the center of the second direction Y.

The number of the positioning projections 244 and the positioning recesses 256 is not limited to 2, and only 1 may be provided as shown in fig. 6, and 3 or more may be provided, although not shown.

The yoke 24, the movable iron piece 25, and the plate spring 30 are not limited to the symmetric shape in the second direction Y, and may have an asymmetric shape in the second direction Y.

Various embodiments of the present invention have been described above in detail with reference to the accompanying drawings, and finally, various embodiments of the present invention are described. In the following description, reference numerals are given to the drawings as an example.

The electromagnet device 20 of the first mode of the present disclosure is supplied with an alternating current, wherein,

the electromagnet device 20 has:

a spool 21 having a cylindrical body 211, the body 211 having a through hole 213 extending in a first direction X formed therein;

a coil 22 wound around the body portion 211 in the first direction X and through which the alternating current flows;

a core 23 disposed in the through hole 213 of the body 211, both ends of the core 23 in the first direction X being exposed to the outside of the bobbin 21, and a suction portion 231 being provided at one end of the core 23 in the first direction X;

a plate-shaped yoke portion 24 having a first member 241 connected to the other end of the core 23 in the first direction X and a second member 242 extending from the first member 241 along the outer circumferential surface of the coil 22 toward the suction portion 231 of the core 23; and

and a plate-shaped movable iron piece 25 having a bent portion 251 in the middle thereof, the movable iron piece 25 being disposed at a free end 243 of the second member 242 of the yoke portion 24 on the side of the attraction portion 231 of the core 23 so as to be rotatable via a pair of rotation fulcrums 254 provided at both ends of the bent portion 251 in a second direction Y intersecting the first direction X and the thickness direction Z of the second member 242, and having an attracted portion 252 attracted by the attraction portion 231 of the core 23 when the coil is excited.

The yoke 24 has at least 1 positioning protrusion 244, the positioning protrusion 244 is provided in the middle of the free end 243 of the second member 242 in the second direction Y, and extends in the first direction X in a direction away from the first member 241,

the movable iron piece 25 has a positioning recess 256, and the positioning recess 256 is provided in the middle of the pair of rotation fulcrums 254 of the bending portion 251, and receives and positions the positioning protrusion 244.

According to the electromagnet device 20 of the first aspect, the yoke portion 24 has at least 1 positioning protrusion 244 provided at the middle of the free end 243 of the second member 242, and the movable iron piece 25 has a positioning recess 256 provided at the middle of the pair of rotation fulcrums 254 of the bent portion 251, and the positioning recess 256 accommodates and positions the positioning protrusion 244. With this configuration, the distance between the pair of rotation fulcrums 254 of the movable iron piece 25 can be increased, and thus the whining sound can be more reliably prevented.

The electromagnet device 20 according to the second aspect of the present disclosure further includes a plate spring 30, and the plate spring 30 biases the movable iron piece 25 toward the second member 242 of the yoke 24 at a point between the pair of rotation fulcrums 254, and rotatably connects the movable iron piece 25 to the yoke 24.

According to the electromagnet device 20 of the second aspect, the attraction state of the movable iron piece 25 to the iron core 23 can be further stabilized.

In the electromagnet device 20 according to the third aspect of the present disclosure, the plate spring 30 biases the movable iron piece 25 toward the second member 242 of the yoke 24 at a point at the center in the second direction Y.

According to the electromagnet device 20 of the third aspect, the attraction state of the movable iron piece 25 to the iron core 23 can be stabilized more reliably.

The electromagnet device 20 according to the fourth aspect of the present disclosure further includes a leaf spring 30 that biases the movable iron piece 25 toward the second member 242 of the yoke 24 at each of the pair of rotation fulcrums 254, and rotatably connects the movable iron piece 25 to the yoke 24, in the leaf spring 30.

According to the electromagnet device 20 of the fourth aspect, the movable iron piece 25 can be more reliably connected to the second member 242 of the yoke 24. That is, the reliability of the connection between the yoke portion 24 and the movable iron piece 25 can be improved.

In the electromagnet device 20 according to the fifth aspect of the present disclosure, each of the yoke 24, the movable iron piece 25, and the plate spring 30 has a shape symmetrical in the second direction Y.

According to the electromagnet device 20 of the fifth aspect, the attraction state of the movable iron piece 25 to the iron core 23 can be stabilized more reliably.

In addition, any of the various embodiments and modifications described above can be appropriately combined to exhibit the respective effects. In addition, combinations of the embodiments or examples or combinations of the embodiments and examples can be made, and combinations of features in different embodiments or examples can also be made.

The present disclosure is fully described in connection with the preferred embodiments with reference to the drawings, but various modifications and corrections are possible for those skilled in the art. It is to be understood that such changes and modifications are intended to be included within the scope of the present disclosure as set forth in the appended claims.

Industrial applicability

The electromagnet device 20 of the present disclosure can be applied to, for example, an electromagnetic relay.

Description of the symbols

1 electromagnetic relay

10 outer casing

11 base

12 casing

13 setting surface

14 receiving part

20 electromagnet device

21 winding reel

211 main body part

212 flange portion

213 through hole

214 opening part

22 coil

23 iron core

231 suction part

232 groove

233 shield coil

234 first adsorption surface

235 second adsorption surface

24 yoke

241 first part

242 second part

243 free end

244 positioning projection

25 movable iron sheet

251 bending part

252 adsorbed part

253 connecting part

254 rotary fulcrum

255 rod-shaped member

256 positioning recess

26 coil terminal

30 leaf spring

31 force application part

32 through hole

40 contact mechanism part

41 movable contact side terminal

411 Movable contact part

42 fixed contact side terminal

421 fixed contact part

50 moving part