Electromagnetic relay

Abstract

The invention provides an electromagnetic relay. The number of parts of the electromagnetic relay is reduced. An electromagnetic relay (1) is provided with a yoke (24), an armature (25), a movable spring (33), and a restriction section (9). The yoke (24) has a fixed portion (241) fixed to the upper end portion (234) of the iron core (23) and a leg portion (242) extending downward from the fixed portion (241). The armature (25) is opposite to the lower surface (235) of the iron core (23) and is close to or far away from the iron core (23) according to excitation of the coil (21). A movable spring (33) has a movable part (34) which is positioned below the armature, is fixed to the armature, and has a movable contact at a first end of the movable part. The restricting portion is provided on an outer side surface of the leg portion separated from the iron core. When the movable contact is in the closed position, the armature is separated from the restricting portion. When the movable contact is in the off position, the armature is in contact with the restricting portion.

Description

Technical Field

[0001] The present disclosure generally relates to an electromagnetic relay. More specifically, the present disclosure relates to an electromagnetic relay having a yoke and an armature. Background Art

[0002] An electromagnetic relay is disclosed in Patent Document 1. The electromagnetic relay of Patent Document 1 includes an electromagnet device, a fixed terminal, a movable spring, a backstop, and a fixed terminal holding portion.

[0003] The fixed terminal has two fixed contacts. The movable spring has two movable contacts that are respectively in contact with and separated from the two fixed contacts, and is movable by the drive of the electromagnet device. The top end of the movable spring is divided into two parts. One of the two movable partitions located on the positive side of the Y direction is set as the first movable partition, and the other located on the negative side of the Y direction is set as the second movable partition. The first movable partition and the second movable partition have movable contacts on the first surface respectively.

[0004] The check valve is a limiting member for suppressing the displacement of the first movable partition and the second movable partition, each of which has a movable contact. The check valve has a limiting portion. The limiting portion is opposite to the second surface in the top end area of ​​the first movable partition and the second movable partition in accordance with the position of the movable contact. That is, there are two limiting portions. The second surface is located on the opposite side of the first surface in the first movable partition and the second movable partition. In addition, the limiting portion can abut against a portion of the second surface on the side opposite to the first surface on the side abutted by the contact when the fixed contact is separated from the movable contact.

[0005] The fixed terminal holding portion holds the fixed terminal and the backstop.

[0006] Prior art literature

[0007] Patent Literature

[0008] Patent Document 1: Japanese Patent Application Publication No. 2018-98181 Summary of the invention

[0009] Problem that the invention aims to solve

[0010] In an electromagnetic relay such as the electromagnetic relay of Patent Document 1, there is a case where it is desired to reduce the number of components constituting the electromagnetic relay.

[0011] An object of the present disclosure is to reduce the number of components.

[0012] Solutions for solving problems

[0013] An electromagnetic relay of one embodiment of the present disclosure includes a coil, a coil frame, an iron core, a yoke, an armature, a movable spring, a fixed terminal and a limiting portion. The coil frame has an upper flange portion, a lower flange portion and a barrel portion, and the coil is wound on the coil frame. The iron core is inserted into the barrel portion of the coil frame, and the upper end portion of the iron core protrudes from the coil frame. The yoke has a fixed portion and a leg portion, the fixed portion is fixed to the upper end portion of the iron core, and the leg portion extends downward from the fixed portion. The armature is opposite to the lower surface of the iron core and approaches or moves away from the iron core according to the excitation of the coil. The movable spring has a movable portion and an extension portion, the movable portion is located below the armature and is fixed to the armature, and has a movable contact at the first end of the movable portion, the extension portion extends upward from the second end of the movable portion and is fixed to the yoke. The fixed terminal has a fixed contact opposite to the movable contact. The movable contact moves in conjunction with the movement of the armature between a closed position in contact with the fixed contact and an open position separated from the fixed contact. The limiting portion is provided on an outer side of the leg away from the iron core. When the movable contact is in the closed position, the armature is separated from the limiting portion. When the movable contact is in the open position, the armature is in contact with the limiting portion.

[0014] Effects of the Invention

[0015] According to the present disclosure, there is an advantage that the number of components can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a perspective view of the appearance of an electromagnetic relay according to an embodiment.

[0017] Figure 2 This is a perspective view of an electromagnetic relay according to an embodiment, in a state where a cover is removed, as seen from the lower front.

[0018] Figure 3 This is a perspective view of an electromagnetic relay according to an embodiment, in a state where a cover is removed, as seen from the upper front.

[0019] Figure 4 It is a cross-sectional view of a state where a cover is removed in an electromagnetic relay according to an embodiment.

[0020] Figure 5 This is a front view of the electromagnetic relay according to one embodiment, in a state where the movable contact is in the open position and the cover is removed.

[0021] Figure 6 This is a front view of the electromagnetic relay according to one embodiment, in a state where the movable contact is in a closed position and the cover is removed.

[0022] Fig. 7A It is an explanatory diagram showing the positional relationship between the yoke and the armature when the movable contact is in the open position in the electromagnetic relay according to the first modification.

[0023] Figure 7B It is an explanatory diagram showing the positional relationship between the yoke and the armature when the movable contact is in the closed position in the electromagnetic relay according to the first modification.

[0024] Fig. 8A It is an explanatory diagram showing the positional relationship between the yoke and the armature when the movable contact is in the open position in the electromagnetic relay of the second modification.

[0025] Figure 8B It is an explanatory diagram showing the positional relationship between the yoke and the armature when the movable contact is in the closed position in the electromagnetic relay according to the second modification.

[0026] Fig.9A It is an explanatory diagram showing the positional relationship between the yoke and the armature when the movable contact is in the open position in the electromagnetic relay according to the third modification.

[0027] Fig. 9B It is an explanatory diagram showing the positional relationship between the yoke and the armature when the movable contact is in the closed position in the electromagnetic relay according to the third modification.

[0028] Fig. 10A It is an explanatory diagram showing the positional relationship between the yoke and the armature when the movable contact is in the open position in the electromagnetic relay according to the fourth modification.

[0029] Fig. 10B It is an explanatory diagram showing the positional relationship between the yoke and the armature when the movable contact is in the closed position in the electromagnetic relay according to the fourth modification.

[0030] Fig.11 This is a perspective view of the electromagnetic relay of Modification 5, in a state where the cover is removed, as seen from the lower front.

[0031] Fig.12 This is a front view of the electromagnetic relay according to Modification 5, in a state where the movable contact is in the open position and the cover is removed.

[0032] Fig.13 This is a front view of the electromagnetic relay according to Modification 5, in a state where the movable contact is in a closed position and the cover is removed.

[0033] Fig.14 This is a perspective view of the electromagnetic relay of Modification 6, in a state where the cover is removed, as seen from the lower front.

[0034] Fig.15This is a front view of the electromagnetic relay according to Modification 6, in a state where the movable contact is in the open position and the cover is removed.

[0035] Fig.16 This is a front view of the electromagnetic relay according to Modification 6, in which the movable contact is in a closed position and the cover is removed.

[0036] Fig.17 This is a perspective view of the electromagnetic relay of Modification 7, in a state where the cover is removed, as seen from the right front.

[0037] Fig.18 It is a cross-sectional view of the electromagnetic relay of Modification 7 in a state where the cover is removed.

[0038] Fig.19 It is a front view of the electromagnetic relay of Modification 7 in a state where the cover is removed.

[0039] Description of Reference Numerals

[0040] 1. Electromagnetic relay; 21. Coil; 22. Coil frame; 221. Cylinder; 222. Upper flange; 223. Lower flange; 23. Iron core; 234. Upper end; 235. Lower surface; 24. Yoke; 241. Fixing portion; 242. Leg; 2420. Outer side; 25. Armature; 250. Armature body; 2500. Plate; 251. First extension; 2511. Top; 252. Second extension; 253. Protrusion (first protrusion); 271. Protrusion; 272. Recess; 31. Fixed contact; 32. Movable contact; 33. Movable spring; 34. Movable portion; 35. Extension; 37. Bend; 38. Bend; 5. Fixed terminal; 9. Limiting portion. DETAILED DESCRIPTION

[0041] The electromagnetic relays of the embodiments and modified examples of the present disclosure are described using the drawings. The drawings described in the following embodiments and modified examples are schematic drawings, and the size and thickness ratios of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0042] (1) Implementation Method

[0043] like Figure 1 to Figure 4 As shown, the electromagnetic relay 1 of the embodiment includes an electromagnetic body block 2, a contact block 3, a main body 4 (housing), a fixed terminal 5, a pair of coil terminals 7, and a limiting portion 9. The electromagnetic relay 1 is a hinge-type electromagnetic relay. The electromagnetic relay 1 is a so-called plug-in relay, for example, used in vehicles such as automobiles or two-wheeled vehicles. In addition, the use of the electromagnetic relay 1 is not limited to vehicles, and can also be other uses.

[0044] like Figure 2 to Figure 5As shown, the electromagnet block 2 includes a coil 21 , a coil bobbin 22 , an iron core 23 , a yoke 24 , and an armature 25 .

[0045] like Figure 4 As shown, the coil frame 22 has a barrel 221. The barrel 221 is formed into a hollow cylindrical shape. The barrel 221 has a through hole 224 that penetrates in the axial direction. Figure 4 The left and right directions of the paper are called the up and down directions.

[0046] like Figure 2 to Figure 5 As shown, the coil frame 22 further includes an upper flange portion 222 and a lower flange portion 223. The upper flange portion 222 and the lower flange portion 223 are respectively formed at both ends in the axial direction of the cylinder portion 221, that is, the upper end and the lower end. The cylinder portion 221, the upper flange portion 222 and the lower flange portion 223 are integrally formed of an insulating material such as resin.

[0047] The upper flange portion 222 is formed in a substantially rectangular plate shape, for example. The lower flange portion 223 is formed in a substantially rectangular plate shape, for example.

[0048] The coil frame 22 also has a storage portion 228. The storage portion 228 is connected to one edge of the lower flange portion 223. Hereinafter, the side ( Figure 4 The lower side of the paper (the lower side of the paper) is referred to as "left", and the opposite side is also referred to as "right". That is, the storage portion 228 is connected to the left edge of the lower flange portion 223. In addition, the direction perpendicular to the up-down direction and the left-right direction is also referred to as the front-back direction. The storage portion 228 is a rectangular box with one surface (right surface) open. A storage space 227 for storing the fixed contact 31 and the movable contact 32 is formed in the storage portion 228.

[0049] The coil 21 is wound around the bobbin 22 . More specifically, the winding of the coil 21 is wound around the cylindrical portion 221 between the upper flange portion 222 and the lower flange portion 223 .

[0050] like Figure 4 As shown, the core 23 has a shaft portion 231 and a flange portion 232. The shaft portion 231 is formed in a columnar shape, more specifically, in a long cylindrical shape. The flange portion 232 is provided at the lower end of the shaft portion 231. The shaft portion 231 and the flange portion 232 are integrally formed of a magnetic material.

[0051] like Figure 4 As shown, the iron core 23 is inserted into the barrel 221 of the coil frame 22. The shaft 231 of the iron core 23 is inserted into the through hole 224 of the barrel 221. The shaft 231 of the iron core 23 has a main body 233 and an upper end 234. The main body 233 is located in the through hole 224. The upper end 234 protrudes from the barrel 221. That is, the upper end 234 of the iron core 23 protrudes from the coil frame 22.

[0052] like Figure 2 to Figure 5 As shown, the yoke 24 includes a fixing portion 241, a leg portion 242, and a terminal portion 244. The fixing portion 241, the leg portion 242, and the terminal portion 244 are integrally formed of a magnetic material.

[0053] The fixing portion 241 is a substantially rectangular plate in a plan view. The fixing portion 241 is located above the upper flange portion 222. The fixing portion 241 is disposed on the upper surface of the upper flange portion 222. The fixing portion 241 has an insertion hole 243. The upper end portion 234 of the core 23 is inserted into the insertion hole 243. The fixing portion 241 is fixed to the upper end portion 234 of the core 23.

[0054] The leg portion 242 extends downward from the fixing portion 241. The leg portion 242 extends along the axial direction of the cylindrical portion 221 of the coil bobbin 22. The leg portion 242 extends from one end of the fixing portion 241. The leg portion 242 extends downward from the right end of the fixing portion 241.

[0055] like Figure 4 , Figure 5 As shown in FIG. 1 , when the movable contact 32 is in the disconnected position described later, the lower end of the leg portion 242 of the yoke 24 contacts the armature 25. That is, the yoke 24 has at least a contact portion 249 (the lower end of the leg portion 242) that contacts the armature 25 when the movable contact 32 is in the disconnected position. In addition, when the movable contact 32 is in the closed position described later (see FIG. 1 ), the lower end of the leg portion 242 of the yoke 24 contacts the armature 25. Figure 6 ), the lower end of the leg 242 of the yoke 24 also contacts the armature 25. The portion of the yoke 24 that contacts the armature 25 when the movable contact 32 is in the closed position and the portion of the yoke 24 that contacts the armature 25 when the movable contact 32 is in the open position (contact portion 249) are substantially the same, but may be slightly different.

[0056] The terminal portion 244 extends from one end of the fixing portion 241. The terminal portion 244 extends from an end (left end) opposite to the end (right end) from which the leg portion 242 extends in the fixing portion 241 in a direction along the plate surface of the fixing portion 241 (left-right direction).

[0057] The terminal portion 244 is formed of a magnetic material as described above. Therefore, the terminal portion 244 has conductivity. The terminal portion 244 functions as a terminal connected to the outside (external connecting member). The connecting member is, for example, a socket for a plug-in relay. Hereinafter, for convenience, there is a case where the terminal portion 244 of the yoke 24 is referred to as a "common terminal 6". That is, the electromagnetic relay 1 also has a common terminal 6.

[0058] The armature 25 is formed of a magnetic material. Figure 4 , Figure 5As shown, the armature 25 is arranged in a manner opposite to the lower surface 235 of the core 23. The armature 25 is fixed to the movable portion 34 of the movable spring 33 described later, and is displaced integrally with the movable portion 34. The armature 25 can rotate with the contact portion with the yoke 24 as a fulcrum. When the coil 21 is energized and excited, the armature 25 is pulled toward the core 23 due to the magnetic force. When the energization of the coil 21 is stopped, the armature 25 moves away from the core 23 by the spring force of the movable spring 33. That is, the armature 25 approaches or moves away from the core 23 according to the excitation of the coil 21.

[0059] like Figure 2 to Figure 5 As shown, the armature 25 includes an armature body 250 , a first extending portion 251 , and a second extending portion 252 .

[0060] The armature body 250 is plate-shaped and faces the lower surface 235 of the core 23. The armature body 250 is a substantially rectangular plate-shaped plate with grooves cut at the left end of the front and rear sides when viewed from above, and has protrusions protruding forward and backward at the front and rear sides of the right end.

[0061] like Figure 4 , Figure 5 As shown in FIG. 1 , the armature body 250 has a contact portion 259 at one end (right end) of the upper surface (the surface opposite to the iron core 23) that contacts the contact portion 249 of the yoke 24 when the movable contact 32 is in the open position described later. Figure 6 ), the armature body 250 also contacts the yoke 24. The portion of the armature body 250 that contacts the yoke 24 when the movable contact 32 is in the closed position and the portion of the armature body 250 that contacts the yoke 24 when the movable contact 32 is in the open position (contact portion 259) are substantially the same, but may be slightly different. The armature 25 substantially rotates relative to the yoke 24 with the contact portion 259 as a fulcrum.

[0062] The first extension portion 251 extends from the armature body 250 toward the outer side surface 2420 of the leg 242. The first extension portion 251 extends from the right surface of the protrusion provided on the front side surface of the armature body 250. In addition, the second extension portion 252 extends from the armature body 250 toward the outer side surface 2420 of the leg 242. The second extension portion 252 extends from the right surface of the protrusion provided on the rear side surface of the armature body 250. The outer side surface 2420 of the leg 242 is a side surface of the leg 242 that is separated from the iron core 23. The armature 25 is formed by the armature body 250 and the first extension portion 251 (or the second extension portion 252) in a substantially L-shaped shape when viewed from the front.

[0063] The first extension portion 251 and the second extension portion 252 extend in directions intersecting (orthogonal in this case) the plate surface 2500 of the armature body 250. The first extension portion 251 and the second extension portion 252 extend from the contact portion 259 of the armature body 250 toward the outer side surface 2420 of the leg portion 242 of the yoke 24.

[0064] like Figure 2 , Figure 3 As shown in FIG. 1 , the first extension portion 251 and the second extension portion 252 extend side by side. The first extension portion 251 and the second extension portion 252 are spaced apart from each other in the front-rear direction, and a space exists between them.

[0065] like Figure 2 to Figure 5 As shown, the contact block 3 includes a fixed contact 31 , a movable contact 32 , and a movable spring 33 .

[0066] like Figure 4 As shown, the fixed contact 31 is provided on the fixed terminal 5. The fixed contact 31 is formed integrally with the fixed terminal 5 using the same material as the fixed terminal 5, but is not limited thereto and may be formed independently of the fixed terminal 5 and fixed thereto.

[0067] like Figure 4 As shown, the movable contact 32 is provided on the movable spring 33. The movable contact 32 is formed integrally with the movable spring 33 by the same material as the movable spring 33, but is not limited thereto and may be formed independently of the movable spring 33 and fixed to the movable spring 33. The movable contact 32 is provided at a position opposite to the fixed contact 31.

[0068] The movable spring 33 is formed of a conductive material such as copper. Figure 2 to Figure 5 As shown, the movable spring 33 includes a movable portion 34 and an extending portion 35. The movable spring 33 is formed by the movable portion 34 and the extending portion 35 in a substantially L-shaped shape in front view.

[0069] The movable portion 34 is plate-shaped (leaf spring-shaped). The movable portion 34 is located below the armature 25. The movable portion 34 is fixed to the armature 25. The movable portion 34 has a movable contact 32 at a first end portion (left end portion).

[0070] The extension portion 35 is plate-shaped. The extension portion 35 extends upward from the second end portion (right end portion) of the movable portion 34. The extension portion 35 is fixed to the yoke 24. The extension portion 35 is fixed to the leg portion 242 of the yoke 24. The extension portion 35 is fixed to the outer side surface 2420 of the leg portion 242 by rivet, for example. The extension portion 35 is located between the first extension portion 251 and the second extension portion 252 of the armature 25.

[0071] When the coil 21 is energized, the movable portion 34 and the armature 25 are displaced integrally, and the movable contact 32 contacts the fixed contact 31. When the coil 21 is de-energized, the movable portion 34 is displaced by the spring force of the movable spring 33, and the movable contact 32 is separated from the fixed contact 31. That is, in the electromagnetic relay 1, the movable contact 32 is linked to the movement of the armature 25 in the closed position (refer to Figure 6 ) is separated from the disconnected position of the fixed contact 31 (refer to Figure 4 , Figure 5 The disconnected position of the movable contact 32 may refer to a position where the movable contact 32 is farthest away from the fixed contact 31 within the movable range of the movable contact 32.

[0072] The limiting portion 9 is an element for limiting the disconnection position of the movable contact 32. In the present embodiment, the limiting portion 9 contacts the armature 25 to limit the movement of the armature 25, thereby limiting the disconnection position of the movable contact 32. Figure 2 , Figure 3 , Figure 5 As shown, the limiting portion 9 is provided on the outer side surface 2420 of the leg portion 242 of the yoke 24. In the present disclosure, "the limiting portion 9 is provided on the outer side surface 2420 of the leg portion 242 of the yoke 24" means that the limiting portion 9 is formed integrally with the leg portion 242 or a member fixed to the leg portion 242 (such as the movable spring 33, the protrusion 29 of the modification 2, etc.). In the present embodiment, the limiting portion 9 includes a part of the yoke 24, more specifically, a part of the outer side surface 2420 of the leg portion 242 of the yoke 24.

[0073] When the movable spring 33 moves in such a manner that the movable contact 32 moves away from the fixed contact 31, the limiting portion 9 contacts the armature 25 to limit further movement of the armature 25. Thus, the limiting portion 9 defines the disconnection position of the movable contact 32. Figure 6 As shown in FIG. 1 , when the coil 21 is energized and the movable contact 32 is in the closed position, the armature 25 moves away from the restricting portion 9. When the energization of the coil 21 is stopped, the movable portion 34 and the armature 25 are displaced integrally (along the Figure 6 The movable contact 32 moves from the closed position to a direction away from the fixed contact 31 (downward). The limiting portion 9 contacts a part of the armature 25 during this movement and limits further movement of the armature 25 (see Figure 4 , Figure 5 ). In this way, the limiting portion 9 limits the movable range of the armature 25, thereby limiting the movable range of the movable portion 34 of the movable spring 33, thereby defining the disconnected position of the movable contact 32. If the angle is changed, when the movable contact 32 is in the closed position, the armature 25 is separated from the limiting portion 9. In addition, when the movable contact 32 is in the disconnected position, the armature 25 contacts the limiting portion 9.

[0074] like Figure 2 to Figure 5 As shown, in the electromagnetic relay 1 of the present embodiment, the top end 2511 of the first extension portion 251 and the top end 2521 of the second extension portion 252 of the armature 25 are in contact with the limiting portion 9. Thus, when the movable contact 32 is in the disconnected position, the first extension portion 251 (and the second extension portion 252) of the armature 25 are in contact with the limiting portion 9 (the outer side surface 2420 of the leg portion 242). More specifically, when the movable contact 32 is in the disconnected position, the top end 2511 of the first extension portion 251 (and the top end 2521 of the second extension portion 252) are in contact with the limiting portion 9. In addition, as Figure 6 As shown, when the movable contact 32 is in the closed position, the first extension portion 251 (and the second extension portion 252) of the armature 25 are separated from the restriction portion 9. When the movable contact 32 is in the closed position, the top end 2511 of the first extension portion 251 (and the top end 2521 of the second extension portion 252) are separated from the restriction portion 9.

[0075] like Figure 6 As shown, when the movable contact 32 is in the closed position, the first extension portion 251 extends in the same direction as the leg portion 242. In addition, when the movable contact 32 is in the closed position, the second extension portion 252 extends in the same direction as the leg portion 242. Here, when the movable contact 32 is in the closed position, the extension direction D10 of the first extension portion 251 and the second extension portion 252 is parallel to the outer side surface 2420 of the leg portion 242. In particular, when the movable contact 32 is in the closed position, the first extension portion 251 does not contact the outer side surface 2420 (limiting portion 9) of the leg portion 242 but extends parallel to the outer side surface 2420 of the leg portion 242. When the movable contact 32 is in the closed position, the second extension portion 252 does not contact the outer side surface 2420 of the leg portion 242 but extends parallel to the outer side surface 2420 of the leg portion 242. Here, "the first extension portion 251 and the leg portion 242 extend in the same direction (or are parallel)" is not limited to the case where the extension direction D10 of the first extension portion 251 and the extension direction of the leg portion 242 are strictly the same (parallel), but includes the case where the angle formed by the extension direction D10 of the first extension portion 251 and the extension direction of the leg portion 242 is within a range of 15 degrees or less when viewed from the front. The same is true for the second extension portion 252.

[0076] The main body 4 includes a substantially rectangular flat plate-shaped base 41 (see Figure 2 to Figure 5 ) and a substantially rectangular box-shaped cover 42 (refer to Figure 1The base 41 has an insertion hole 411 for inserting the fixed terminal 5 and an insertion hole 412 for inserting the common terminal 6 (the terminal portion 244 of the yoke 24). In addition, the base 41 also has a configuration hole 413. The storage portion 228 of the coil frame 22 is configured in the configuration hole 413. Here, as Figure 2 , Figure 3 As shown, the storage portion 228 has a pair of insertion holes 229 for inserting a pair of coil terminals 7, in addition to the above-mentioned storage space 227. One surface (left surface) of the cover 42 is open, and it is mounted on the base 41 in a manner that covers the base 41 from the right side. The main body 4 accommodates the electromagnet block 2 (excluding the lower part of the terminal portion 244 of the yoke 24) and the contact block 3. In the electromagnetic relay 1 of this embodiment, the extension direction (up and down direction) of the coil 21 and the core 23 is along the surface of the base 41.

[0077] The fixed terminal 5 is formed of a conductive material such as copper. The fixed terminal 5 has a fixed contact 31. The fixed terminal 5 is held by the main body 4.

[0078] like Figure 4 As shown, the fixed terminal 5 includes a base portion 50 and a first connecting portion 51. The base portion 50 and the first connecting portion 51 are formed integrally.

[0079] The base 50 is a portion of the fixed terminal 5 that is held by the main body 4. The base 50 is inserted into the insertion hole 411 of the base 41. The base 50 is a plate-shaped substantially L-shaped plate when viewed from the front. The first end (lower end) of the base 50 passes through a through hole formed on the upper surface of the storage portion 228 and is located in the storage space 227. The fixed contact 31 is provided at the first end of the base 50. The second end (left end) of the base 50 is connected to the first connecting portion 51.

[0080] The first connection portion 51 is a portion connected to the outside (connection member) in the fixed terminal 5. The first connection portion 51 is exposed from the main body 4 and protrudes to the left. The first connection portion 51 is connected to the connection member by being inserted into the connection member from the right, for example.

[0081] The common terminal 6 (terminal portion 244) is formed of a conductive material (magnetic material). As described above, the common terminal 6 is a part of the yoke 24. At least a part of the terminal portion 244 of the yoke 24, for example, the entire terminal portion 244, is the common terminal 6. Therefore, the common terminal 6 is fixed to the yoke 24. The common terminal 6 is electrically connected to the movable contact 32. Since the extension portion 35 of the movable spring 33 is fixed to the leg portion 242 of the yoke 24, the common terminal 6 is electrically connected to the movable contact 32 via the fixed portion 241 of the yoke 24, the leg portion 242 of the yoke 24, and the movable spring 33.

[0082] The common terminal 6 is held by the main body 4 . The common terminal 6 is inserted into the insertion hole 412 of the base 41 and is held by the base 41 .

[0083] like Figure 4 As shown, the common terminal 6 includes a base portion 60 and a second connecting portion 61. The base portion 60 and the second connecting portion 61 are formed integrally.

[0084] The base 60 is a portion of the common terminal 6 that is held by the main body 4 . The base 60 is inserted into the insertion hole 412 of the base 41 .

[0085] The second connection portion 61 is a portion connected to the outside (connection member) in the common terminal 6. The second connection portion 61 is connected to the left end of the base 60. The second connection portion 61 is exposed from the body 4 and protrudes to the left. The second connection portion 61 is connected to the connection member by, for example, inserting the connection member from the right.

[0086] The coil terminal 7 is formed of a conductive material such as copper. The coil terminal 7 is connected to the coil 21. Figure 2 to Figure 5 As shown, the coil terminal 7 has a winding portion 72. The top end of the coil 21 is wound around the winding portion 72, and the winding portion 72 and the coil 21 are connected by solder or the like. The first coil terminal 701 of the pair of coil terminals 7 is connected to the first end of the coil 21, and the second coil terminal 702 of the pair of coil terminals 7 is connected to the second end of the coil 21. The coil terminal 7 is held in the main body 4. The coil terminal 7 is held in the main body 4 by being held in the storage portion 228 held in the base 41. The coil terminal 7 is inserted into the insertion hole 229 of the storage portion 228 and held in the storage portion 228.

[0087] like Figure 2 to Figure 4 As shown in FIG. 1 , the coil terminal 7 includes a base portion 70 and a third connecting portion 71 in addition to the above-mentioned winding portion 72. The base portion 70, the third connecting portion 71 and the winding portion 72 are integrally formed.

[0088] The base 70 is a portion held by the storage portion 228 in the coil terminal 7. The base 70 is inserted into the insertion hole 229 of the storage portion 228. The coil portion 72 is connected to the right end of the base 70.

[0089] The third connection portion 71 is a portion connected to the outside (connection member) in the coil terminal 7. The third connection portion 71 is connected to the left end of the base 70. The third connection portion 71 is exposed from the body 4 and protrudes to the left. The third connection portion 71 is connected to the connection member by, for example, inserting the connection member from the right.

[0090] The first connection portion 51, the second connection portion 61, and the third connection portion 71 all extend toward the left from the main body 4. That is, the extension direction (left-right direction) of the connection portions (the first connection portion 51, the second connection portion 61, and the third connection portion 71) of the terminals (the fixed terminal 5, the common terminal 6, and the coil terminal 7) is a direction that intersects (here, is orthogonal to) the extension direction (up-down direction) of the iron core 23.

[0091] The thickness of each of the first connection portion 51, the second connection portion 61, and the third connection portion 71 is constant. On the other hand, in each of the first connection portion 51, the second connection portion 61, and the third connection portion 71, an inclined surface is formed at the top end portion in such a manner that the dimension in the width direction gradually decreases toward the top end (left end).

[0092] Next, refer to Figures 4 to 6 The operation of electromagnetic relay 1 according to the present embodiment will be described.

[0093] Before energizing the coil 21, Figure 4 , Figure 5 As shown, the spring force of the movable spring 33 is used to separate the armature 25 from the iron core 23, and the movable contact 32 is separated from the fixed contact 31 (the disconnected position of the movable contact 32). At this time, the top 2511 of the first extension 251 of the armature 25 and the top 2521 of the second extension 252 are in contact with the outer side surface 2420 (limiting portion 9) of the leg 242 of the yoke 24.

[0094] When the coil 21 is energized, the core 23 is magnetized, and the armature 25 is pulled toward the flange 232 of the core 23. As a result, the top end (first end) of the movable portion 34 to which the armature 25 is fixed moves upward, and the movable contact 32 contacts the fixed contact 31 (see FIG. 2 ). Figure 6 : The closed position of the movable contact 32). As a result, the movable contact 32 is conducted with the fixed contact 31. When the movable contact 32 is in contact with the fixed contact 31, the current can flow in a path including the fixed terminal 5, the fixed contact 31, the movable contact 32, the movable spring 33, the leg 242 of the yoke 24, the fixed portion 241 of the yoke 24, and the terminal portion 244 (common terminal 6) of the yoke 24. In the closed position of the movable contact 32, the top 2511 of the first extension portion 251 of the armature 25 and the top 2521 of the second extension portion 252 are separated from the outer side surface 2420 (limiting portion 9) of the leg 242 of the yoke 24.

[0095] When the power to the coil 21 is cut off, the iron core 23 is demagnetized, and the armature 25 is separated from the flange 232 of the iron core 23 by the spring force of the movable spring 33. As a result, the top end (first end) of the movable portion 34 of the movable spring 33 is displaced downward, and the movable contact 32 is separated from the fixed contact 31 (see Figure 4 , Figure 5 As a result, the movable contact 32 and the fixed contact 31 are electrically disconnected. When the movable portion 34 is displaced so that the movable contact 32 is separated from the fixed contact 31, the armature 25 is moved along the periphery of the contact portion 249 by the spring force of the movable spring 33. Figure 4 When the top end 2511 of the first extension portion 251 of the armature 25 and the top end 2521 of the second extension portion 252 contact the outer side surface 2420 (limiting portion 9) of the leg portion 242 of the yoke 24, further rotation of the armature 25 is limited. As a result, the movable contact 32 is maintained in the disconnected position (the position farthest away from the fixed contact 31).

[0096] In the electromagnetic relay 1 of the present embodiment, the disconnected position of the movable contact 32 can be limited by the limiting portion 9 provided on the outer side surface 2420 of the leg portion 242 of the yoke 24. Thus, compared with the electromagnetic relay of Patent Document 1, for example, which has a dedicated check valve for limiting the disconnected position of the movable contact 32, the number of components can be reduced. In addition, compared with the electromagnetic relay of the comparative example which has neither the limiting portion 9 nor the check valve, the accuracy of the distance (contact gap) between the movable contact 32 and the fixed contact 31 when the movable contact 32 is in the disconnected position can be improved.

[0097] In addition, in the electromagnetic relay 1 of the present embodiment, the limiting portion 9 includes a part of the yoke 24. Thus, compared with, for example, a case where a member different from the yoke 24 is mounted on the outer side surface 2420 of the leg 242 as the limiting portion 9, the manufacturing process can be simplified. In particular, in the electromagnetic relay 1 of the present embodiment, the outer side surface 2420 of the leg 242 (the outer side surface 2420 itself) is used as the limiting portion 9. Thus, compared with, for example, a case where a protrusion serving as the limiting portion 9 is formed by processing such as protruding a part of the leg 242, the manufacturing process can be simplified.

[0098] In the electromagnetic relay 1 of the present embodiment, the armature 25 has the first extension portion 251 that contacts the limiting portion 9. In the electromagnetic relay 1 of the present embodiment, in particular, when the movable contact 32 is in the disconnected position, the top end 2511 of the first extension portion 251 contacts the limiting portion 9. Therefore, when the movable contact 32 is in the disconnected position, the armature 25 (the top end 2511 of the first extension portion 251) is in line contact with the limiting portion 9. By making the armature 25 in line contact with the limiting portion 9, the accuracy of the disconnected position of the movable contact 32 can be improved compared to the case where the armature 25 is in surface contact with the limiting portion 9, and the accuracy of the contact gap can be improved. That is, when the armature 25 is in surface contact with the limiting portion 9, there is a possibility that the disconnected position of the movable contact 32 is deviated depending on which part of the surface of the armature 25 that contacts the limiting portion 9 contacts the limiting portion 9 first. On the other hand, by making the armature 25 and the restricting portion 9 in line contact, it is possible to reduce the variation in the opening position of the movable contact 32 and improve the accuracy of the contact gap.

[0099] In addition, in the electromagnetic relay 1 of the present embodiment, the armature 25 has a second extension portion 252 in contact with the limiting portion 9 in addition to the first extension portion 251. Thus, when the movable contact 32 is located at the disconnected position, the armature 25 can be made to contact with the limiting portion 9 at two locations, and the accuracy of the contact gap can be improved. In addition, in the electromagnetic relay 1 of the present embodiment, the extension portion 35 of the movable spring 33 is located between the first extension portion 251 and the second extension portion 252, and the first extension portion 251 and the second extension portion 252 are separated from each other in the front-to-back direction. Thus, the armature 25 can be made to contact with the limiting portion 9 at two locations separated from each other, and the accuracy of the contact gap can be further improved.

[0100] In addition, in the electromagnetic relay 1 of the present embodiment, when the movable contact 32 is in the closed position, the first extension portion 251 and the leg portion 242 extend in the same direction. In the electromagnetic relay 1, when the movable contact 32 is in the closed position, the top end 2511 of the first extension portion 251 is farthest away from the outer side surface 2420 of the leg portion 242 of the yoke 24. That is, in the electromagnetic relay 1 of the present embodiment, when the top end 2511 of the first extension portion 251 is farthest away from the outer side surface 2420 of the leg portion 242 of the yoke 24, the extension direction of the first extension portion 251 is the same as (parallel to) the extension direction of the leg portion 242. Thus, the protrusion amount of the first extension portion 251 from the outer side surface 2420 of the leg portion 242 can be suppressed to be small. Furthermore, the size of the electromagnetic relay 1 can be miniaturized.

[0101] (2) Modification

[0102] The above-mentioned embodiment is only one of various embodiments of the present disclosure. The above-mentioned embodiment can be modified in various ways according to design, etc. as long as the purpose of the present disclosure can be achieved. The following lists the modified examples of the embodiment. The above-mentioned embodiment and the modified examples described below can be appropriately combined for application.

[0103] (2.1) Modification 1

[0104] In the electromagnetic relay 1 of this modification, as Fig. 7A , Figure 7B As shown in FIG. 2 , a protrusion 271 is integrally provided on the outer side surface 2420 of the leg portion 242 of the yoke 24. The protrusion 271 is provided on the outer side surface 2420 of the leg portion 242 of the yoke 24 at a position that contacts the top end 2511 of the first extension portion 251 when the armature 25 is displaced in a manner that the movable contact 32 is separated from the fixed contact 31. Fig. 7A As shown, the top end 2511 of the first extension portion 251 contacts the surface 2710 of the protruding top end of the protrusion 271. In the electromagnetic relay 1 of this modified example, the protrusion 271 functions as the restricting portion 9. The protrusion 271 can be formed, for example, by pushing up a plate-like member constituting the leg portion 242 of the yoke 24 from the left surface side to the right.

[0105] Thus, in the electromagnetic relay 1 of this modified example, the restricting portion 9 includes the protrusion 271 provided on the outer side surface 2420 of the leg portion 242. When the movable contact 32 is in the disconnected position (see Figure 4 , Figure 5 ) Fig. 7A As shown in FIG. 1 , the first extension portion 251 of the armature 25 contacts the protrusion 271 as the restricting portion 9. In addition, when the movable contact 32 is in the closed position (refer to Figure 6 ) Figure 7B As shown, the first extending portion 251 of the armature 25 is separated from the protrusion 271 serving as the restricting portion 9 .

[0106] Also in the electromagnetic relay 1 of this modification, the number of components can be reduced.

[0107] In addition, instead of the protrusion 271 or in addition to the protrusion 271, a protrusion 271 may be formed on the outer side surface 2420 of the leg portion 242 and on the top end 2521 of the second extension portion 252 (see Figure 2 to Figure 4 ) is provided at the contact position.

[0108] (2.2) Modification 2

[0109] like Fig. 8A , Figure 8BAs shown, the protrusion of the limiting portion 9 provided on the outer side surface 2420 of the leg portion 242 of the yoke 24 may not be a part of the yoke 24, and may be formed independently of the yoke 24 and fixed to the yoke 24. That is, the limiting portion 9 may also include a protrusion 29 formed independently of the yoke 24 and fixed to the yoke 24. The material of the protrusion 29 is not particularly limited, and may be the same as the material of the yoke 24 (magnetic material), or may be a different material (such as a metal material, a resin material, etc.).

[0110] (2.3) Modification 3

[0111] In the electromagnetic relay 1 of this modification, as Fig.9A , Fig. 9B As shown, a recess 272 is provided on the outer side surface 2420 of the leg 242 of the yoke 24. The recess 272 is provided in the outer side surface 2420 of the leg 242 of the yoke 24 at a position where the top end 2511 of the first extension 251 enters when the armature 25 is displaced in a manner that the movable contact 32 is separated from the fixed contact 31. Fig.9A As shown, the tip 2511 of the first extending portion 251 is in contact with the inner surface 2720 of the recess 272. In the electromagnetic relay 1 of the present modification, the recess 272 functions as the restricting portion 9.

[0112] Thus, in the electromagnetic relay 1 of this modified example, the restricting portion 9 includes the recessed portion 272 provided on the outer side surface 2420 of the leg portion 242. When the movable contact 32 is in the disconnected position (see Figure 4 , Figure 5 ) Fig.9A As shown in FIG. 1 , the first extension portion 251 of the armature 25 contacts the recess 272 serving as the limiting portion 9. In addition, when the movable contact 32 is in the closed position (refer to Figure 6 ) Fig. 9B As shown, the first extension portion 251 of the armature 25 is separated from the recessed portion 272 serving as the restricting portion 9 .

[0113] Also in the electromagnetic relay 1 of this modification, the number of components can be reduced.

[0114] Alternatively, instead of the recess 272 or in addition to the recess 272 , a recess may be provided at a position in the outer side surface 2420 of the leg portion 242 that contacts the tip 2521 of the second extension portion 252 .

[0115] (2.4) Modification 4

[0116] In the electromagnetic relay 1 of this modification, as Fig. 10A , Fig. 10BAs shown, the armature 25 does not have the first extension portion 251 and the second extension portion 252, but instead has a first protrusion 253 extending from the end of the armature body 250 along the plate surface 2500 of the armature body 250 (see Fig.11 ).

[0117] In addition, a protrusion 271 is provided on the outer side surface 2420 of the leg portion 242 of the yoke 24. The protrusion 271 of the yoke 24 is provided on the outer side surface 2420 of the leg portion 242 of the yoke 24 at a position that contacts the first protrusion 253 when the armature 25 is displaced in a manner that the movable contact 32 is separated from the fixed contact 31. Fig. 10A As shown, the first protrusion 253 of the armature 25 is in contact with the tip of the protrusion 271. In the electromagnetic relay 1 of this modification, the protrusion 271 functions as the restriction portion 9.

[0118] Thus, in the electromagnetic relay 1 of this modified example, the armature 25 has: a plate-shaped armature body 250, which is opposite to the lower surface 235 of the iron core 23; and a protrusion (first protrusion 253), which is provided at the end of the armature body 250 and protrudes from the end along the plate surface 250 of the armature body 250. When the movable contact 32 is in the disconnected position (refer to Figure 4 , Figure 5 ) Fig. 10A As shown in FIG. 1 , the protrusion (first protrusion 253) of the armature 25 contacts the protrusion 271 of the restricting portion 9. In addition, when the movable contact 32 is in the closed position (refer to FIG. 1 ), the movable contact 32 is in the closed position (refer to FIG. 1 ). Figure 6 ) Fig. 10B As shown, the protrusion of the armature 25 is separated from the protrusion 271 serving as the limiting portion 9 .

[0119] In the electromagnetic relay 1 of this modified example, the number of components can also be reduced. In addition, since the armature 25 does not have the first extension portion 251 and the second extension portion 252, when the armature 25 is supplied to the manufacturing line during the manufacture of the electromagnetic relay 1, the first extension portion 251 and the second extension portion 252 do not become obstacles. Thus, the manufacturing process can be simplified.

[0120] Furthermore, the armature 25 may include a second protrusion extending rightward from the right surface of the protrusion provided on the rear side surface of the armature body 250, instead of the first protrusion 253 or in addition to the first protrusion 253. Furthermore, instead of the protrusion 271 or in addition to the protrusion 271, a protrusion may be provided on the outer side surface 2420 of the leg 242 at a position in contact with the second protrusion.

[0121] (2.5) Modification 5

[0122] In the electromagnetic relay 1 of this modification, as Fig.11 As shown in the figure, the armature 25 does not have the first extension portion 251 and the second extension portion 252, but has the first protrusion portion 253 and the second protrusion portion 254 instead. The first protrusion portion 253 extends toward the right from the right surface of the protrusion portion provided on the front side of the armature body 250. The second protrusion portion 254 extends toward the right from the right surface of the protrusion portion provided on the rear side of the armature body 250. That is, the armature 25 has: a plate-shaped armature body 250 that faces the lower surface 235 of the iron core 23; and a protrusion portion (the first protrusion portion 253 or the second protrusion portion 254) that is provided at the end of the armature body 250 and protrudes from the end along the plate surface 2500 of the armature body 250.

[0123] In addition, if Fig.11 As shown in FIG. 1 , the movable spring 33 has a bent portion 37. The bent portion 37 is provided at the extension portion 35 of the movable spring 33. The bent portion 37 is provided at the lower end of the extension portion 35. The bent portion 37 is formed by bending a portion of the metal plate constituting the movable spring 33 upward by approximately 90 degrees. The thickness direction of the bent portion 37 is along the up-down direction. The bent portion 37 extends from the lower end of the extension portion 35 in a direction intersecting (approximately orthogonal to) the extension direction of the extension portion 35.

[0124] The movable spring 33 has two bent portions 37. Hereinafter, the two bent portions 37 are also referred to as the first bent portion 371 and the second bent portion 372. The first bent portion 371 and the second bent portion 372 are separately arranged at the front and rear ends of the lower end of the extension portion 35. The first bent portion 371 is provided at a position where it contacts the first protrusion 253 when the armature 25 is displaced in a manner that the movable contact 32 is separated from the fixed contact 31, and the second bent portion 372 is provided at a position where it contacts the second protrusion 254 when the armature 25 is displaced in a manner that the movable contact 32 is separated from the fixed contact 31. The first bent portion 371 is opposite to the first protrusion 253 of the armature 25, and the second bent portion 372 is opposite to the second protrusion 254 of the armature 25. The lower surface of the first bent portion 371 faces the upper surface of the first protrusion 253 , and the lower surface of the second bent portion 372 faces the upper surface of the second protrusion 254 .

[0125] like Fig.12 As shown in FIG. 1 , when the movable contact 32 is in the disconnected position, the first protrusion 253 of the armature 25 contacts the first bent portion 371 of the movable spring 33. In addition, when the movable contact 32 is in the disconnected position, the second protrusion 254 of the armature 25 also contacts the second bent portion 372 of the movable spring 33. Fig.13As shown, when the movable contact 32 is in the closed position, the first protrusion 253 of the armature 25 is separated from the first bent portion 371 of the movable spring 33. In addition, when the movable contact 32 is in the closed position, the second protrusion 254 of the armature 25 is also separated from the second bent portion 372 of the movable spring 33.

[0126] In summary, in the electromagnetic relay 1 of this modified example, the limiting portion 9 includes a part of the movable spring 33, and more specifically includes the bent portion 37 (the first bent portion 371 and the second bent portion 372) of the movable spring 33. When the movable contact 32 is in the closed position, the armature 25 is separated from the bent portion 37 of the movable spring 33 as the limiting portion 9. When the movable contact 32 is in the open position, the armature 25 is in contact with the bent portion 37 of the movable spring 33 as the limiting portion 9.

[0127] In the electromagnetic relay 1 of this modification as well, the number of components can be reduced and the accuracy of the contact gap can be improved.

[0128] (2.6) Modification 6

[0129] In the electromagnetic relay 1 of this modification, as Fig.14 As shown, the movable spring 33 has a bent portion 38. The bent portion 38 is provided at the extension portion 35 of the movable spring 33. However, the bending direction of the bent portion 38 of this modification is different from that of the bent portion 37 of the electromagnetic relay 1 of the modification 5. The bent portion 38 is formed by bending a part of the metal plate constituting the movable spring 33 approximately 90 degrees in the left-right direction. The thickness direction of the bent portion 38 is along the front-back direction. The bent portion 38 is connected to the side surface of the extension portion 35 and extends along the extension direction (in the up-down direction) of the extension portion 35.

[0130] The movable spring 33 has two bent portions 38. Hereinafter, the two bent portions 38 are also referred to as the first bent portion 381 and the second bent portion 382. The first bent portion 381 is connected to the front side surface of the extension portion 35, and the second bent portion 382 is connected to the rear side surface of the extension portion 35. The first bent portion 381 is provided at a position where it contacts the first protrusion 253 when the armature 25 is displaced in a manner that the movable contact 32 is separated from the fixed contact 31, and the second bent portion 382 is provided at a position where it contacts the second protrusion 254 when the armature 25 is displaced in a manner that the movable contact 32 is separated from the fixed contact 31. The first bent portion 381 is opposite to the first protrusion 253 of the armature 25, and the second bent portion 382 is opposite to the second protrusion 254 of the armature 25. The lower edge of the first bent portion 381 faces the upper surface of the first protrusion 253 , and the lower edge of the second bent portion 382 faces the upper surface of the second protrusion 254 .

[0131] like Fig.15As shown in FIG. 1 , when the movable contact 32 is in the disconnected position, the first protrusion 253 of the armature 25 contacts the lower edge of the first bent portion 381 of the movable spring 33. In addition, when the movable contact 32 is in the disconnected position, the second protrusion 254 of the armature 25 also contacts the lower edge of the second bent portion 382 of the movable spring 33. Fig.16 As shown, when the movable contact 32 is in the closed position, the first protrusion 253 of the armature 25 is separated from the first bent portion 381 of the movable spring 33. In addition, when the movable contact 32 is in the closed position, the second protrusion 254 of the armature 25 is also separated from the second bent portion 382 of the movable spring 33.

[0132] In the electromagnetic relay 1 of this modification as well, the number of components can be reduced and the accuracy of the contact gap can be improved.

[0133] (2.7) Modification 7

[0134] In the electromagnetic relay 1 of this modification, as Fig.17 As shown, the axial direction, that is, the up-down direction, of the cylindrical portion 221 of the coil bobbin 22 intersects (is perpendicular to) the surface of the base 41 .

[0135] In addition, the leg portion 242, which is a portion extending downward from the fixing portion 241 in the yoke 24, has a terminal portion 244 that functions as the common terminal 6. That is, the terminal portion 244 of this modified example extends downward along the extension direction of the iron core 23 from the right end of the fixing portion 241 which is a part of the leg portion 242 and is fixed to the upper end portion 234 of the iron core 23.

[0136] like Fig.17 As shown, the leg portion 242 further includes a first support portion 245 and a second support portion 246. The first support portion 245 and the second support portion 246 extend downward from the right end of the fixing portion 241. The terminal portion 244 is located between the first support portion 245 and the second support portion 246 in the front-rear direction.

[0137] In addition, if Fig.17 As shown, the extension portion 35 of the movable spring 33 includes a base 350, a first arm 351, and a second arm 352. The base 350 is plate-shaped. The base 350 is located outside (right side) of the first support portion 245 and the second support portion 246 and inside (left side) of the terminal portion 244. The base 350 is fixed to the first support portion 245 and the second support portion 246 in the leg portion 242 of the yoke 24 by, for example, riveting. The first arm 351 extends downward from the base 350 and is connected to the movable portion 34. The second arm 352 extends downward from the base 350 and is connected to the movable portion 34. The movable spring 33 includes a through hole 36 surrounded by the movable portion 34, the base 350, the first arm 351, and the second arm 352.

[0138] The armature 25 and the lower end 247 of the first support portion 245 (see Fig.19 ) and the lower end 248 of the second support portion 246 (refer to Fig.18 That is, in this modification, the lower end 247 of the first support portion 245 and the lower end 248 of the second support portion 246 include a contact portion 249 that contacts the armature 25 at least when the movable contact 32 is in the disconnected position. The armature 25 can rotate with the contact portion with the yoke 24 as a fulcrum.

[0139] The armature body 250 is a substantially rectangular plate having grooves cut at the left ends of the front and rear sides when viewed from above. The first extension portion 251 and the second extension portion 252 of the armature 25 extend upward from the front and rear ends of the right end surface of the armature body 250. The first extension portion 251 and the second extension portion 252 are located in the through hole 36 of the movable spring 33.

[0140] Furthermore, when the movable contact 32 is in the disconnected position, the first extension portion 251 of the armature 25 contacts the outer side surface 2450 (limiting portion 9) of the first support portion 245 of the leg portion 242 of the yoke 24, and the second extension portion 252 of the armature 25 contacts the outer side surface 2460 (limiting portion 9) of the second support portion 246 of the leg portion 242 of the yoke 24.

[0141] Also in the electromagnetic relay 1 of this modification, the number of components can be reduced.

[0142] In addition, if Fig.18 As shown, in the electromagnetic relay 1 of this modified example, the first connecting portion 51 of the fixed terminal 5 has a plate-shaped first plate portion 81 and a plate-shaped second plate portion 82 in contact with the first plate portion 81. The second plate portion 82 is formed by bending upward from the lower end 811 of the first plate portion 81 in a manner overlapping with the first plate portion 81. The lower end 811 of the first plate portion 81 and the lower end 821 of the second plate portion 82 are connected.

[0143] The first plate portion 81 has a first protrusion 815 protruding in the thickness direction of the first plate portion 81 on the surface (left surface) opposite to the surface (right surface) in contact with the second plate portion 82. In the first plate portion 81, the first protrusion 815 protrudes in the thickness direction of the first plate portion 81 more than the remaining portion 819 of the first plate portion 81. In addition, the second plate portion 82 has a second protrusion 825 protruding in the thickness direction of the second plate portion 82 on the surface (right surface) opposite to the surface (left surface) in contact with the first plate portion 81. In the second plate portion 82, the second protrusion 825 protrudes in the thickness direction of the second plate portion 82 more than the remaining portion 829 of the second plate portion 82.

[0144] (2.8) Other variations

[0145] In one variation, the protrusion 271 of the yoke 24 that functions as the limiting portion 9 can be formed by bending the lower end of the plate-like member constituting the leg 242 upward by approximately 90 degrees, or by scraping off the portion of the plate-like member constituting the leg 242 other than the protrusion 271.

[0146] In a modified example, the bending angle of the bent portion 37 of the movable spring 33 is not limited to approximately 90 degrees. The bending angle of the bent portion 37 can be any angle as long as the lower surface of the first bent portion 371 is opposite to the upper surface of the first protrusion 253 and the lower surface of the second bent portion 372 is opposite to the upper surface of the second protrusion 254. Alternatively, the bent portion 37 may be formed by bending a portion of the metal plate constituting the movable spring 33 approximately 180 degrees, and the bent portion 37 and the extension portion 35 overlap. In this case, the portion where the extension portion 35 and the bent portion 37 are connected (the lower end edge of the bent portion 37) can function as the restricting portion 9.

[0147] In a modified example, the bending angle of the bent portion 38 of the movable spring 33 is not limited to approximately 90 degrees. The bending angle of the bent portion 38 can be any angle as long as the lower edge of the first bent portion 381 is opposite to the upper surface of the first protrusion 253 and the lower edge of the second bent portion 382 is opposite to the upper surface of the second protrusion 254. For example, the rear surface of the first bent portion 381 and the front surface of the second bent portion 382 may be opposite. Alternatively, the bent portion 38 may be formed by bending a portion of the metal plate constituting the movable spring 33 approximately 180 degrees, and the bent portion 38 and the extension portion 35 may overlap.

[0148] In a modified example, the restricting portion 9 may include both a protrusion 271 and a recess 272 provided on the yoke 24. In a specific example, the first extension portion 251 of the armature 25 may contact the protrusion 271 (restricting portion 9), and the second extension portion 252 may contact the recess 272 (restricting portion 9).

[0149] In a modified example, the restricting portion 9 may include both a part of the yoke 24 and a part of the movable spring 33 .

[0150] In a modified example, the common terminal 6 may be formed of a member different from the yoke 24 and fixed to the yoke 24. In this case, the material of the common terminal 6 and the material of the yoke 24 may be different.

[0151] (3) Method

[0152] As is apparent from the above-described embodiment and modified examples, the following aspects are disclosed in this specification.

[0153] The electromagnetic relay 1 of the first embodiment includes a coil 21, a coil frame 22, an iron core 23, a yoke 24, an armature 25, a movable spring 33, a fixed terminal 5, and a restricting portion 9. The coil frame 22 includes an upper flange portion 222, a lower flange portion 223, and a barrel portion 221, and the coil 21 is wound around the coil frame 22. The iron core 23 is inserted into the barrel portion 221 of the coil frame 22, and the upper end portion 234 of the iron core 23 protrudes from the coil frame 22. The yoke 24 includes a fixed portion 241 and a leg portion 242, the fixed portion 241 is fixed to the upper end portion 234 of the iron core 23, and the leg portion 242 extends downward from the fixed portion 241. The armature 25 is opposite to the lower surface 235 of the iron core 23, and approaches or moves away from the iron core 23 according to the excitation of the coil 21. The movable spring 33 includes a movable portion 34 and an extending portion 35. The movable portion 34 is located below the armature 25 and is fixed to the armature 25, and has a movable contact 32 at a first end of the movable portion 34. The extension portion 35 extends upward from the second end of the movable portion 34 and is fixed to the yoke 24. The fixed terminal 5 has a fixed contact 31 opposite to the movable contact 32. The movable contact 32 moves between a closed position in contact with the fixed contact 31 and an open position separated from the fixed contact 31 in conjunction with the movement of the armature 25. The limiting portion 9 is provided on an outer side surface 2420 separated from the iron core 23 in the leg portion 242. When the movable contact 32 is in the closed position, the armature 25 is separated from the limiting portion 9. When the movable contact 32 is in the open position, the armature 25 is in contact with the limiting portion 9.

[0154] According to this aspect, the number of components can be reduced and the accuracy of the contact gap can be improved.

[0155] In the electromagnetic relay 1 of the second embodiment, in addition to the first embodiment, the restriction portion 9 includes a part of the yoke 24 .

[0156] According to this aspect, by utilizing the yoke 24 as the restriction portion 9 , the number of components can be reduced.

[0157] In the electromagnetic relay 1 according to the third embodiment, in addition to the second embodiment, the restriction portion 9 includes a protrusion 271 provided on the outer side surface 2420 of the leg portion 242 .

[0158] According to this aspect, by utilizing the protrusion 271 provided on the yoke 24 as the restriction portion 9 , it is possible to reduce the number of components.

[0159] In the electromagnetic relay 1 according to the fourth aspect, in addition to the second aspect or the third aspect, the restricting portion 9 includes a recessed portion 272 provided on an outer side surface 2420 of the leg portion 242 .

[0160] According to this aspect, by utilizing the recessed portion 272 provided in the yoke 24 as the restricting portion 9 , it is possible to reduce the number of components.

[0161] In the electromagnetic relay 1 of the fifth aspect, in addition to any one of the first to fourth aspects, the restriction portion 9 includes a protrusion 271 formed of a material different from that of the yoke 24 and fixed to the yoke 24 .

[0162] According to this embodiment, the number of components can be reduced by utilizing the protrusion 271 integrated with the yoke 24 as the restriction portion 9 .

[0163] In the electromagnetic relay 1 according to the sixth aspect, in addition to any one of the first to fifth aspects, the restriction portion 9 includes a part of the movable spring 33 .

[0164] According to this aspect, by utilizing the movable spring 33 as the restricting portion 9 , the number of components can be reduced.

[0165] In the electromagnetic relay 1 of the seventh embodiment, in addition to the sixth embodiment, the movable spring 33 has bent portions 37 and 38. The restricting portion 9 includes the bent portions 37 and 38 of the movable spring 33. When the movable contact 32 is located at the closed position, the armature 25 is separated from the bent portions 37 and 38 of the movable spring 33. When the movable contact 32 is located at the open position, the armature 25 is in contact with the bent portions 37 and 38 of the movable spring 33.

[0166] According to this aspect, the portion functioning as the restricting portion 9 in the movable spring 33 can be easily formed.

[0167] The electromagnetic relay 1 according to the eighth aspect is the electromagnetic relay according to the seventh aspect, wherein the bent portions 37 and 38 are provided on the extending portion 35 of the movable spring 33 .

[0168] According to this aspect, by utilizing the bent portions 37 and 38 provided in the extending portion 35 of the movable spring 33 as the restricting portion 9 , it is possible to reduce the number of components.

[0169] In the electromagnetic relay 1 of the ninth aspect, in addition to any one of the first to eighth aspects, the armature 25 has an armature body 250 and a first extension portion 251. The armature body 250 is plate-shaped and faces the lower surface 235 of the core 23. The first extension portion 251 extends from the armature body 250 toward the outer side surface 2420 of the leg 242. When the movable contact 32 is in the closed position, the first extension portion 251 is separated from the restriction portion 9. When the movable contact 32 is in the open position, the first extension portion 251 contacts the restriction portion 9.

[0170] According to this aspect, since the armature 25 includes the first extending portion 251 that contacts the restricting portion 9 , the accuracy of the contact gap can be improved.

[0171] The electromagnetic relay 1 of the tenth aspect is the embodiment of the ninth aspect, wherein when the movable contact 32 is located at the open position, the tip 2511 of the first extending portion 251 contacts the restricting portion 9 .

[0172] According to this aspect, the first extending portion 251 of the armature 25 can be brought into line contact with the restricting portion 9 at the opening position of the movable contact 32 , and the accuracy of the contact gap can be improved.

[0173] In the electromagnetic relay 1 of the eleventh aspect, in addition to the ninth or tenth aspect, the armature 25 further includes a second extension portion 252 extending in parallel with the first extension portion 251. The extension portion 35 of the movable spring 33 is located between the first extension portion 251 and the second extension portion 252.

[0174] According to this aspect, the accuracy of the contact gap can be improved.

[0175] In the electromagnetic relay 1 of the twelfth aspect, in addition to any one of the ninth to eleventh aspects, when the movable contact 32 is located at the closed position, the first extension portion 251 and the leg portion 242 extend in the same direction.

[0176] According to this aspect, the size of the electromagnetic relay 1 can be reduced.

[0177] In the electromagnetic relay 1 of the 13th embodiment, in addition to any one of the first to 12th embodiments, the armature 25 has an armature body 250 and a protrusion (first protrusion 253). The armature body 250 is plate-shaped and faces the lower surface 235 of the core 23. The protrusion is provided at the end of the armature body 250 and protrudes from the end along the plate surface 2500 of the armature body 250. When the movable contact 32 is in the closed position, the protrusion of the armature 25 is separated from the limiting portion 9. When the movable contact 32 is in the open position, the protrusion of the armature 25 is in contact with the limiting portion 9.

[0178] According to this aspect, since the armature 25 includes the protrusion (the first protrusion 253 ) that contacts the restriction portion 9 , the accuracy of the contact gap can be improved.

Claims

1. An electromagnetic relay, wherein: The electromagnetic relay has: Coil; a coil frame having an upper flange portion, a lower flange portion and a barrel portion, and the coil is wound around the coil frame; an iron core inserted into the cylindrical portion of the coil frame, wherein an upper end portion of the iron core protrudes from the coil frame; A yoke having a fixing portion and a leg portion, wherein the fixing portion is fixed to the upper end portion of the iron core, and the leg portion extends downward from the fixing portion; an armature which is opposite to the lower surface of the core and moves closer to or farther from the core according to the excitation of the coil; A movable spring having a movable portion and an extension portion, wherein the movable portion is located below the armature and is fixed to the armature, and has a movable contact at a first end of the movable portion, and the extension portion extends upward from a second end of the movable portion and is fixed to the yoke; a fixed terminal having a fixed contact point opposite to the movable contact point; as well as Restriction Department, The movable contact moves in conjunction with the movement of the armature between a closed position in contact with the fixed contact and an open position separated from the fixed contact. The limiting portion is provided on an outer side surface of the leg portion away from the iron core, When the movable contact is located at the closed position, the armature is separated from the limiting portion. When the movable contact is located at the open position, the armature comes into contact with the restricting portion.

2. The electromagnetic relay according to claim 1, wherein: The restricting portion includes a portion of the yoke.

3. The electromagnetic relay according to claim 2, wherein: The restricting portion includes a protrusion provided on the outer side surface of the leg portion.

4. The electromagnetic relay according to claim 2, wherein: The restricting portion includes a recessed portion provided on the outer side surface of the leg portion.

5. The electromagnetic relay according to claim 1, wherein: The restricting portion includes a protrusion formed independently of the yoke and fixed to the yoke.

6. The electromagnetic relay according to any one of claims 1 to 5, wherein: The restricting portion includes a portion of the movable spring.

7. The electromagnetic relay according to claim 6, wherein: The movable spring has a bent portion formed by bending, The limiting portion includes the bent portion of the movable spring, When the movable contact is located at the closed position, the armature is separated from the bent portion of the movable spring. When the movable contact is located at the disconnected position, the armature contacts the bent portion of the movable spring.

8. The electromagnetic relay according to claim 7, wherein: The bending portion is provided on the extending portion of the movable spring.

9. The electromagnetic relay according to any one of claims 1 to 8, wherein: The armature has: a plate-shaped armature body, which is opposite to the lower surface of the core; and a first extension portion extending from the armature body toward the outer side surface of the leg portion, When the movable contact is located at the closed position, the first extending portion is separated from the limiting portion. When the movable contact is located at the open position, the first extending portion is in contact with the restricting portion.

10. The electromagnetic relay according to claim 9, wherein: When the movable contact is located at the disconnected position, the tip of the first extending portion contacts the restricting portion.

11. The electromagnetic relay according to claim 9 or 10, wherein: The armature further includes a second extension portion extending in alignment with the first extension portion. The extending portion of the movable spring is located between the first extending portion and the second extending portion.

12. The electromagnetic relay according to any one of claims 9 to 11, wherein: When the movable contact is located at the closed position, the first extending portion and the leg portion extend in the same direction.

13. The electromagnetic relay according to any one of claims 1 to 12, wherein: The armature has: a plate-shaped armature body, which is opposite to the lower surface of the iron core; as well as a protrusion, which is provided at an end of the armature body and protrudes from the end along the plate surface of the armature body, When the movable contact is located at the closed position, the protrusion of the armature is separated from the restricting portion, When the movable contact is located at the open position, the protrusion of the armature comes into contact with the restricting portion.

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