Electromagnetic device

Abstract

The electromagnet device comprises: a winding drum having a cylindrical main body with a through hole provided therein; a coil wound around the main body; an iron core arranged in the through hole of the main body; a plate-shaped yoke having a first component connected to the iron core and a second component extending from the first component along the outer peripheral surface of the coil; and a plate-shaped movable iron piece having a bent portion in the middle. The yoke has at least one positioning protrusion provided in the middle of the free end of the second component, and the movable iron piece has a positioning recess provided in the middle of a pair of rotation fulcrums of the bent portion, and receives the positioning protrusion for positioning.

Description

Technical Field

[0001] The present disclosure relates to an electromagnet device supplied with an alternating current. Background Art

[0002] Patent document 1 describes an electromagnet device of an electromagnetic relay that uses alternating current for excitation. In the electromagnet device, a cutout is provided in the magnetic attraction portion of the iron core that attracts the movable iron piece, thereby increasing the magnetic force per unit area of ​​the magnetic attraction portion. As a result, the movable iron piece is held in the magnetic attraction portion of the iron core in a stable state, thereby preventing the generation of humming noise.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Utility Model Application Laid-Open No. 05-11411 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] In the above-mentioned electromagnet device, for example, when the iron core is tilted, the magnetic attraction portion is also tilted. Therefore, when the movable iron piece is attracted to the magnetic attraction portion of the iron core, a gap is generated between the movable iron piece and the magnetic attraction portion, and the attraction state of the movable iron piece relative to the iron core becomes unstable, and sometimes the generation of the humming sound cannot be reliably prevented.

[0008] An object of the present disclosure is to provide an electromagnet device supplied with an alternating current, which can more reliably prevent the generation of a whining sound.

[0009] Means for solving problems

[0010] An electromagnet device of one example of the present disclosure is supplied with an alternating current, wherein:

[0011] The electromagnet device comprises:

[0012] A winding reel having a cylindrical main body, wherein a through hole extending in a first direction is provided inside the main body;

[0013] a coil, which is wound around the main body in the first direction and allows the alternating current to flow through;

[0014] an iron core disposed in the through hole of the main body, both ends of the iron core in the first direction being exposed to the outside of the winding drum, and an adsorption portion being provided at one end of the iron core in the first direction;

[0015] a plate-shaped yoke 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 along the outer peripheral surface of the coil toward the attraction portion of the core; and

[0016] A plate-shaped movable iron piece having a bent portion in the middle, the movable iron piece is arranged at a free end of the second component of the yoke on the side of the adsorption portion of the iron core in a manner that it can rotate via a pair of rotation fulcrums, and has an adsorbed portion that is adsorbed by the adsorption portion of the iron core when the coil is excited, the pair of rotation fulcrums being arranged at both ends of the bent portion in a second direction intersecting the first direction and the thickness direction of the second component,

[0017] The yoke has at least one positioning protrusion, which is disposed in the middle of the free end of the second component in the second direction and extends in the first direction away from the first component.

[0018] The movable iron piece has a positioning recessed portion, which is provided between the pair of rotation fulcrums of the bending portion and receives the positioning protrusion for positioning.

[0019] Effects of the Invention

[0020] According to the electromagnet device, the yoke has at least one positioning protrusion disposed in the middle of the free end of the second component, and the movable iron piece has a positioning recess disposed in the middle of a pair of rotation fulcrums of the curved portion, and receives the positioning protrusion for positioning. With such a structure, the distance between the pair of rotation fulcrums of the movable iron piece can be increased, so that the generation of humming noise can be more reliably prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a perspective view of an electromagnetic relay including an electromagnet device according to an embodiment of the present disclosure.

[0022] Figure 2 Yes Figure 1 A side view of an electromagnetic relay with a cover partially removed.

[0023] Figure 3 It is a perspective view of an electromagnet device according to one embodiment of the present disclosure.

[0024] Figure 4 It is along Figure 3 A cross-sectional view taken along line IV-IV.

[0025] Figure 5 yes Figure 3 Front view of the electromagnet device.

[0026] Figure 6 Yes means Figure 3 A front view of a modified example of an electromagnet device. DETAILED DESCRIPTION

[0027] Below, an example of the present disclosure is described according to the accompanying drawings. In addition, in the following description, terms indicating specific directions or positions are used as needed (for example, terms including "upper", "lower", "right", and "left"), but the use of these terms is to facilitate the understanding of the present disclosure with reference to the accompanying drawings, and the technical scope of the present disclosure is not limited by the meaning of these terms. In addition, the following description is essentially only illustrative and is not intended to limit the present disclosure, its application, or its use. Moreover, the drawings are schematic, and the ratios of various dimensions may not be consistent with reality.

[0028] like Figure 1 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 housing 10 composed of a base 11 and a housing 12. Figure 2 As shown, the base 11 has a substantially rectangular plate shape, and one surface in the thickness direction thereof constitutes a setting surface 13. The housing 12 is a substantially rectangular box shape, and is mounted on the base 11 in a manner covering the setting surface 13 of the base 11. A storage portion 14 constituted by the setting surface 13 of the base 11 and the housing 12 is provided inside the housing 10.

[0029] like Figure 2 As shown, the housing portion 14 houses the electromagnet device 20 and the contact mechanism portion 40 which are respectively fixed to the installation surface 13 of the base 11 .

[0030] like Figure 3 as well as Figure 4 As shown, the electromagnet device 20 includes: an insulating winding drum 21; a coil 22 wound on the winding drum 21; an iron core 23 (only shown in FIG. 1 ) disposed inside the winding drum 21; Figure 4 );A yoke 24 connected to the core 23 at one end;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 leaf spring 30.

[0031] like Figure 4 As shown in the figure, the winding drum 21 is composed of a cylindrical main body 211 extending in a first direction X intersecting (for example, orthogonal to) the installation surface 13, and two flanges 212 respectively provided at both ends of the main body 211 in the first direction X. As an example, the main body 211 has a substantially cylindrical shape, and a through hole 213 extending in the first direction X is provided inside the main body 211. Both ends of the through hole 213 are connected to each flange 212. That is, each flange 212 is provided with an opening 214 connected to the through hole 213.

[0032] like Figure 4 As shown, the coil 22 is wound around the main body 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 via the coil terminal 26 .

[0033] like Figure 4 As shown, as an example, the iron core 23 has a substantially cylindrical shape and is disposed in the through hole 213 of the main body 211 of the winding drum 21. Both ends of the iron core 23 in the first direction X are exposed to the outside of the winding drum 21. An adsorption portion 231 for adsorbing an adsorbed 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. In addition, a first component 241 of the yoke 24 described later is connected to the other end of the iron core 23 in the first direction X.

[0034] The adsorption portion 231 includes a groove 232 provided on one end surface of the core 23 in the first direction X and a shield coil 233 fitted into the groove 232. The end surface of the core 23 in the first direction X that is surrounded by the shield coil 233 around the first direction X is set as the first adsorption surface 234, and the end surface that is not surrounded by the shield coil 233 around the first direction X is set as the second adsorption surface 235. When an alternating current is supplied to the coil 22, a phase difference is generated between the magnetic flux passing through the first adsorption surface 234 and the magnetic flux passing through the second adsorption surface 235, and one of the first adsorption surface 234 and the second adsorption surface 235 is always magnetized.

[0035] like Figure 4 As shown, as an example, the yoke 24 is a substantially rectangular plate bent into an L shape, and has a first component 241 connected to the other end of the core 23 in the first direction X, and a second component 242 extending from the first component 241 along the outer peripheral surface of the coil 22 toward the adsorption portion 231 of the core 23. Figure 3 As shown, at least one (two in this embodiment) positioning protrusions 244 are provided at the free end 243 of the second component 242 (i.e., the end of the second component 242 on the side away from the first component 241 in the first direction X). When the direction intersecting (e.g., orthogonal to) the first direction X and the thickness direction Z of the second component 242 is set as the second direction Y, each positioning protrusion 244 is provided in the middle of the second direction Y of the free end 243 of the second component 242, and is 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 component 241.

[0036] like Figure 3As shown, as an example, the movable iron piece 25 is roughly L-shaped with a curved portion 251 extending in the middle along the second direction Y, and the movable iron piece 25 has: an adsorbed portion 252 extending in the thickness direction Z of the second component 242; and a connecting portion 253 extending in the first direction X. The adsorbed portion 252 is adsorbed by the adsorbing portion 231 of the iron core 23 when an alternating current flows through the coil 22 and is excited. At the end of the connecting portion 253 on the side away from the curved portion 251 in the first direction X and in the center of the second direction Y, there is provided a portion that is connected to the movable component 50 ( Figure 2 The movable iron piece 25 and the contact mechanism portion 40 are connected via the movable member 50.

[0037] The bent portion 251 has a pair of rotation fulcrums 254 at both ends of the second component 242, and the movable iron piece 25 is arranged at the free end 243 of the second component 242 of the yoke 24 in a manner that can rotate via each rotation fulcrum 254. In other words, the movable iron piece 25 is arranged at the free end 243 of the second component 242 of the yoke 24 in a manner that can rotate around the rotation axis L passing through the pair of rotation fulcrums 254.

[0038] In addition, the bent portion 251 has a positioning recess 256, which is provided in the middle of the pair of rotation fulcrums 254 and accommodates the positioning protrusion 244 to perform positioning in the second direction Y. In this embodiment, there are two positioning recesses 256 corresponding to the two positioning protrusions 244, and as an example, each positioning recess 256 is configured as a through hole that penetrates the movable iron piece 25 in the plate thickness direction.

[0039] like Figure 5 As shown, the leaf spring 30 is in a substantially rectangular shape extending along the first direction X, and its end on the side away from the movable iron piece 25 in the first direction X is fixed to the second component 242 of the yoke 24. The leaf spring 30 includes: a force applying portion 31 for applying force to the movable iron piece 25 toward the second component 242 of the yoke 24; and a through hole 32 for inserting the rod-shaped component 255 of the movable iron piece 25. The force applying portion 31 is provided at the end of the leaf spring 30 on the side close to the movable iron piece 25 in the first direction X and at the center in the second direction Y, and is arranged between the two positioning recesses 256 of the movable iron piece 25. Through the force applying portion 31, the movable iron piece 25 is forced toward the second component 242 of the yoke 24 at a point in the middle of a pair of rotation fulcrums 254.

[0040] The yoke 24 , the movable iron piece 25 , and the leaf spring 30 each have a symmetrical shape in the second direction Y. That is, the leaf spring 30 urges the movable iron piece 25 toward the second member 242 of the yoke 24 at a central point in the second direction Y.

[0041] like Figure 2As shown, the contact mechanism 40 is arranged adjacent to the electromagnet device 20 in the longitudinal direction of the base 11 (i.e., the thickness direction Z of the second component 242 of the yoke 24). As an example, the contact mechanism 40 is composed of a movable contact side terminal 41 in a substantially rectangular plate shape and two substantially rectangular plate-shaped fixed contact side terminals 42 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 storage portion 14 to the inside of the storage portion 14, respectively, and are electrically independently arranged in a manner that the plate surfaces face each other. A movable contact portion 411 is provided at the end of the movable contact side terminal 41 on the side of the storage portion 14, and a fixed contact portion 421 facing the movable contact portion 411 is provided at the end of each fixed contact side terminal 42 on the side of the storage portion 14.

[0042] The movable contact side terminal 41 is connected to the rod-shaped member 255 of the movable iron piece 25 of the electromagnet device 20 via the movable member 50 in the storage portion 14. The movable member 50 is configured to be driven along the longitudinal direction Z of the base 11 according to the excitation / de-excitation of the electromagnet device 20, so that the movable contact portion 411 contacts or separates with respect to the fixed contact portion 421.

[0043] According to the electromagnet device 20, the yoke 24 has at least one 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 a pair of rotation fulcrums 254 of the curved portion 251, and accommodates the positioning protrusion 244 for positioning. With such a structure, the distance between the pair of rotation fulcrums 254 of the movable iron piece 25 can be enlarged. That is, when the adsorbed portion 252 of the movable iron piece 25 is adsorbed by the adsorption portion 231 of the iron core 23, the triangle with the contact point between the adsorbed portion 252 of the movable iron piece 25 and the adsorption portion 231 of the iron core 23 and the pair of rotation fulcrums 254 of the movable iron piece 25 as vertices becomes larger, and the adsorption state of the movable iron piece 25 relative to the iron core 23 is stabilized. As a result, even if the iron core 23 is tilted and a gap is partially generated between the attracting portion 231 of the iron core 23 and the attracted portion 252 of the movable iron piece 25 , the occurrence of the whining sound can be more reliably prevented.

[0044] In addition, a leaf spring 30 is provided, which applies force to the movable iron piece 25 toward the second component 242 of the yoke 24 at a point in the middle of the pair of rotation fulcrums 254, and connects the movable iron piece 25 to the yoke 24 in a rotatable manner. With such a structure, the adsorption state of the movable iron piece 25 relative to the iron core 23 can be made more stable.

[0045] Furthermore, the leaf spring 30 urges the movable iron piece 25 toward the second member 242 of the yoke 24 at a central point in the second direction Y. With such a structure, the adsorption state of the movable iron piece 25 with respect to the iron core 23 can be stabilized more reliably.

[0046] In addition, the yoke 24, the movable iron piece 25, and the leaf spring 30 have shapes that are symmetrical in the second direction. With such a structure, the adsorption state of the movable iron piece 25 with respect to the iron core 23 can be stabilized more reliably.

[0047] In addition, the leaf spring 30 is not limited to the case where the movable iron piece 25 is urged toward the second member 242 of the yoke 24 at a point in the middle of the pair of rotation fulcrums 254. Figure 6 As shown, the leaf spring 30 may be configured to bias the movable iron piece 25 toward the second member 242 of the yoke 24 at each of the pair of rotation fulcrums 254 . Figure 6 The leaf spring 30 has two force applying parts 31 provided at the end of the leaf spring 30 on the movable iron piece 25 side in the first direction X and at both ends in the second direction Y. With such a configuration, the movable iron piece 25 can be more reliably connected to the second component 242 of the yoke 24. That is, the connection reliability between the yoke 24 and the movable iron piece 25 can be improved.

[0048] The leaf spring 30 only needs to apply force to the movable iron piece 25 toward the second component 242 of the yoke 24 at a point in the middle of the pair of rotation fulcrums 254 . The leaf spring 30 is not limited to applying force to the movable iron piece 25 toward the second component 242 of the yoke 24 at a point in the center of the second direction Y.

[0049] In addition, the number of the positioning protrusions 244 and the positioning recesses 256 is not limited to two, and the number of the positioning protrusions 244 and the positioning recesses 256 may also be two. Figure 6 As shown, only one is provided, but although not shown in the figure, three or more may be provided.

[0050] In addition, the yoke 24 , the movable iron piece 25 , and the leaf spring 30 are not limited to the cases where they have symmetrical shapes in the second direction Y, and they may have asymmetrical shapes in the second direction Y.

[0051] In the above, various embodiments of the present invention have been described in detail with reference to the drawings, and finally various modes of the present invention will be described. In addition, in the following description, reference numerals are also attached as an example.

[0052] The electromagnet device 20 of the first aspect of the present disclosure is supplied with an alternating current, wherein:

[0053] The electromagnet device 20 has:

[0054] The winding drum 21 has a cylindrical main body 211, and a through hole 213 extending along the first direction X is provided inside the main body 211;

[0055] a coil 22, which is wound around the main body 211 in the first direction X so as to allow the alternating current to flow through;

[0056] an iron core 23 disposed in the through hole 213 of the main body 211, with both ends of the iron core 23 in the first direction X exposed to the outside of the winding drum 21, and an adsorption portion 231 provided at one end of the iron core 23 in the first direction X;

[0057] a plate-shaped yoke 24 having a first component 241 connected to the other end of the core 23 in the first direction X and a second component 242 extending from the first component 241 along the outer peripheral surface of the coil 22 toward the adsorption portion 231 of the core 23; and

[0058] A plate-shaped movable iron piece 25 has a bent portion 251 in the middle, and is arranged at a free end 243 of the second part 242 of the yoke 24 on the side of the adsorption portion 231 of the iron core 23 in a manner that it can rotate via a pair of rotation fulcrums 254, and has an adsorbed portion 252 that is adsorbed by the adsorption portion 231 of the iron core 23 when the coil is excited, wherein the pair of rotation fulcrums 254 are arranged at both ends of the bent portion 251 in a second direction Y that intersects the first direction X and the thickness direction Z of the second part 242.

[0059] The yoke 24 has at least one positioning protrusion 244, which is disposed in the middle of the free end 243 of the second component 242 in the second direction Y and extends in the first direction X in a direction away from the first component 241.

[0060] The movable iron piece 25 has a positioning recess 256 disposed between the pair of rotation fulcrums 254 of the curved portion 251 and receiving the positioning protrusion 244 for positioning.

[0061] According to the first embodiment of the electromagnet device 20, the yoke 24 has at least one 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 a pair of rotation fulcrums 254 of the curved portion 251, and is positioned by receiving the positioning protrusion 244. With such a structure, the distance between the pair of rotation fulcrums 254 of the movable iron piece 25 can be increased, so that the generation of the whining sound can be more reliably prevented.

[0062] The electromagnet device 20 of the second aspect of the present disclosure further includes a leaf spring 30 that urges the movable iron piece 25 toward the second member 242 of the yoke 24 at a point between the pair of rotation fulcrums 254 to rotatably connect the movable iron piece 25 to the yoke 24 .

[0063] According to the electromagnet device 20 of the second embodiment, the adsorption state of the movable iron piece 25 with respect to the iron core 23 can be further stabilized.

[0064] In the electromagnet device 20 according to the third aspect of the present disclosure, the leaf spring 30 urges the movable iron piece 25 toward the second member 242 of the yoke 24 at a central point in the second direction Y.

[0065] According to the electromagnet device 20 of the third embodiment, the adsorption state of the movable iron piece 25 with respect to the iron core 23 can be stabilized more reliably.

[0066] The fourth embodiment of the electromagnet device 20 of the present disclosure further includes a leaf spring 30 which applies force to the movable iron piece 25 toward the second component 242 of the yoke 24 at each of the pair of rotational fulcrums 254 to connect the movable iron piece 25 to the yoke 24 in a rotatable manner.

[0067] According to the electromagnet device 20 of the fourth embodiment, the movable iron piece 25 can be more reliably connected to the second member 242 of the yoke 24. That is, the connection reliability between the yoke 24 and the movable iron piece 25 can be improved.

[0068] In the electromagnet device 20 according to the fifth aspect of the present disclosure, the yoke 24 , the movable iron piece 25 , and the leaf spring 30 have shapes symmetrical in the second direction Y, respectively.

[0069] According to the electromagnet device 20 of the fifth aspect, the adsorption state of the movable iron piece 25 with respect to the iron core 23 can be stabilized more reliably.

[0070] It should be noted that, by appropriately combining any of the above-mentioned various embodiments or variations, the effects possessed by each can be exerted. In addition, the embodiments can be combined with each other, or the embodiments can be combined with each other, or the embodiments can be combined with the embodiments, and the features in different embodiments or embodiments can also be combined with each other.

[0071] The present disclosure has been fully described in relation to the preferred embodiments with reference to the accompanying drawings, but various changes and modifications may be made by those skilled in the art, and it should be understood that such changes and modifications are included within the scope of the present disclosure as long as they do not depart from the scope of the appended claims.

[0072] Industrial Applicability

[0073] The electromagnet device 20 of the present disclosure can be applied to, for example, an electromagnetic relay.

[0074] Explanation of symbols

[0075] 1 Electromagnetic relay

[0076] 10. Housing

[0077] 11. Base

[0078] 12 Housing

[0079] 13 Setting the surface

[0080] 14 Storage

[0081] 20 Electromagnetic device

[0082] 21 Reel

[0083] 211 Main body

[0084] 212 flange

[0085] 213 Through hole

[0086] 214 Opening

[0087] 22 Coil

[0088] 23 Core

[0089] 231 Adsorption Department

[0090] 232 slots

[0091] 233 Shielding Coil

[0092] 234 First adsorption surface

[0093] 235 Second adsorption surface

[0094] 24 Yoke

[0095] 241 First Part

[0096] 242 Second Part

[0097] 243 Free end

[0098] 244 Positioning protrusion

[0099] 25 Movable iron sheet

[0100] 251 Bend

[0101] 252 Adsorbed part

[0102] 253 Connection

[0103] 254 Rotation fulcrum

[0104] 255 Rod-shaped parts

[0105] 256 Positioning recess

[0106] 26 Coil terminal

[0107] 30 Leaf Spring

[0108] 31 Force application

[0109] 32 Through holes

[0110] 40 Contact mechanism

[0111] 41 Movable contact side terminal

[0112] 411 Movable contact part

[0113] 42 Fixed contact side terminal

[0114] 421 Fixed contact part

[0115] 50 moving parts

Claims

1. An electromagnet device, the electromagnet device being supplied with an alternating current, wherein: The electromagnet device comprises: A winding reel having a cylindrical main body, wherein a first through hole extending in a first direction is provided inside the main body; a coil, which is wound around the main body in the first direction and allows the alternating current to flow through; an iron core disposed in the first through hole of the main body, both ends of the iron core in the first direction being exposed to the outside of the winding drum, and an adsorption portion being provided at one end of the iron core in the first direction; a plate-shaped yoke 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 along the outer peripheral surface of the coil toward the adsorption portion of the core; as well as A plate-shaped movable iron piece having a bent portion in the middle, the movable iron piece is arranged at a free end of the second component of the yoke portion close to the adsorption portion of the iron core in a manner that can rotate via a pair of rotation fulcrums, and has an adsorbed portion that is adsorbed by the adsorption portion of the iron core when the coil is excited, the pair of rotation fulcrums being arranged at both ends of the bent portion in a second direction intersecting the first direction and the thickness direction of the second component, The yoke has at least one positioning protrusion, which is disposed in the middle of the free end of the second component in the second direction and extends in the first direction away from the first component. The movable iron piece has a positioning recess, which is arranged between the pair of rotation fulcrums of the bending portion and receives the positioning protrusion for positioning. The movable iron piece has: The adsorbed portion extends from the bent portion along the thickness direction of the second component; a connecting portion extending from the bent portion along the first direction; as well as a rod-shaped member disposed at an end of the connecting portion in the first direction away from the bent portion and at the center of the connecting portion in the second direction, The electromagnet device further includes a leaf spring that rotatably connects the movable iron piece to the yoke. The leaf spring has a biasing portion for biasing the movable iron piece toward the second member of the yoke, the biasing portion being located at the same position as the positioning recess in the first direction and at the center of the movable iron piece in the second direction; and a second through hole in which the rod-shaped member is disposed.

2. The electromagnet device according to claim 1, wherein: The leaf spring urges the movable iron piece toward the second member of the yoke at a central point in the second direction.

3. The electromagnet device according to claim 1 or 2, wherein: The yoke, the movable iron piece, and the leaf spring each have a symmetrical shape in the second direction.

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