Electromagnetic relay

Abstract

The invention provides an electromagnetic relay. The number of parts of the electromagnetic relay is reduced. In an electromagnetic relay, an armature (25) faces a lower surface (235) of an iron core (23) and approaches or moves away from the iron core (23) according to excitation of a coil (21). The movable spring (33) has a movable part (34) which is positioned below the armature (25), is fixed to the armature (25), and has a movable contact at a first end of the movable part. The yoke (24) has a fixed portion (241), a terminal portion (244), and a first support portion (245). The fixing portion (241) is located above an upper flange portion (222) of the bobbin (22) and is fixed to an upper end portion (234) of the iron core (23). The terminal portion extends downward from the fixing portion and is connected to the outside. The first support portion extends downward from the fixing portion. A lower end (247) of the first support portion is in contact with the armature.

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. Background Art

[0002] An electromagnetic relay is disclosed in Patent Document 1. The electromagnetic relay of Patent Document 1 includes a relay body, a housing, and a connecting terminal. The relay body includes a fixed contact, a movable contact, and an electromagnet device that makes the movable contact contact and separate relative to the fixed contact. The electromagnet device includes a coil, a coil frame, an iron core, a yoke, and an armature. The housing includes a storage space for storing the relay body. The connecting terminal is provided on the relay body. The connecting terminal protrudes from the housing to the outside. The connecting terminal includes a fixed contact connecting terminal, a movable contact connecting terminal, and a pair of coil connecting terminals.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2020-155240 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] 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.

[0008] An object of the present disclosure is to reduce the number of components.

[0009] Solutions for solving problems

[0010] 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 and a fixed terminal. The coil frame has an upper flange portion, a lower flange portion and a barrel portion, and the coil is wound around 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 is fixed to the upper end portion of the iron core. 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 its first end. The extension portion extends upward from the second end of the movable portion. The fixed terminal has a fixed contact opposite to the movable contact and is connected to the outside. The yoke has a fixed portion, a terminal portion and a first support portion. The fixed portion is located above the upper flange portion and is fixed to the upper end portion of the iron core. The terminal portion extends downward from the fixing portion and is connected to the outside. The first support portion extends downward from the fixing portion. The lower end of the first support portion contacts the armature.

[0011] Effects of the Invention

[0012] According to the present disclosure, there is an advantage that the number of components can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a perspective view of the appearance of an electromagnetic relay according to an embodiment.

[0014] Figure 2 This is a perspective view of the electromagnetic relay according to the embodiment, in a state where the cover is removed, as seen from the right front.

[0015] Figure 3 This is a perspective view of the electromagnetic relay according to the embodiment, in a state where the cover is removed, as seen from the left front.

[0016] Figure 4 It is a cross-sectional view of a state where a cover is removed in an electromagnetic relay according to an embodiment.

[0017] Figure 5 It is a top view of the electromagnetic relay in the state where the cover is removed according to the embodiment.

[0018] Figure 6 This is a perspective view of a movable spring and a movable contact included in the electromagnetic relay according to an embodiment, as seen from the left front.

[0019] Figure 7 This is a front view of the electromagnetic relay according to one embodiment in a state where a cover is removed.

[0020] Figure 8 This is a perspective view of a fixed terminal included in an electromagnetic relay according to an embodiment, as seen from the front bottom.

[0021] Fig. 9 This is a cross-sectional view of an electromagnetic relay according to an embodiment in which a movable contact is in contact with a fixed contact and a case is removed.

[0022] Fig.10 It is a perspective view of the electromagnetic relay of Modification 1 in a state where the cover is removed.

[0023] Fig.11 It is a perspective view of the electromagnetic relay of Modification 2 in a state where the cover is removed.

[0024] Fig.12 It is a perspective view of a yoke included in the electromagnetic relay according to the second modification.

[0025] Description of Reference Numerals

[0026] 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; 2410. Upper surface; 244. Terminal; 245. First supporting portion; 247. Lower end; 246. Second supporting portion; 248. Lower end; 25. Armature; 31. Fixed contact; 32. Movable contact; 33. Movable spring; 34. Movable portion; 35. Extension portion; 350. Base; 351. First arm; 352. Second arm; 36. Through hole; 5. Fixed terminal; L1. First boundary line; L2. Second boundary line; L3. Third boundary line; L10. Imaginary line; L20. Imaginary line. DETAILED DESCRIPTION

[0027] 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.

[0028] (1) Implementation Method

[0029] 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 and a pair of coil terminals 7. 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.

[0030] like Figure 2 to Figure 4 As shown, the electromagnet block 2 includes a coil 21 , a coil bobbin 22 , an iron core 23 , a yoke 24 , and an armature 25 .

[0031] like Figure 4 As shown, the coil frame 22 has a cylinder 221. The cylinder 221 is formed in a hollow cylindrical shape. The cylinder 221 has a through hole 224 that penetrates in the axial direction. Hereinafter, for convenience, the axial direction of the cylinder 221 is also referred to as the up-down direction.

[0032] like Figure 2 to Figure 4 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.

[0033] The upper flange portion 222 is formed in a substantially rectangular plate shape, for example. A recess 226 is formed on the upper surface of the upper flange portion 222. The lower flange portion 223 is formed in a substantially hollow rectangular box shape, for example. The lower surface of the lower flange portion 223 is open, and a storage space 227 for storing the fixed contact 31 and the movable contact 32 is formed on the lower side of the lower flange portion 223.

[0034] 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 .

[0035] 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.

[0036] 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.

[0037] The yoke 24 is fixed to the upper end 234 of the core 23. Figure 2 to Figure 4 As shown, the yoke 24 includes a fixing portion 241 and a leg portion 242. The yoke 24 is formed into a substantially L-shaped letter in a front view by the fixing portion 241 and the leg portion 242. The fixing portion 241 and the leg portion 242 are integrally formed of a magnetic material.

[0038] The fixing portion 241 is a plate-like shape that is roughly rectangular when viewed from above. The upper surface 2410 of the fixing portion 241 is flat. The fixing portion 241 is located above the upper flange portion 222. The fixing portion 241 is arranged in the recess 226 of the upper flange portion 222. The fixing portion 241 has an insertion hole 243. The upper end portion 234 of the iron core 23 is inserted into the insertion hole 243. The fixing portion 241 is fixed to the upper end portion 234 of the iron core 23.

[0039] The leg 242 extends downward from the fixed portion 241. The leg 242 extends along the axial direction of the cylindrical portion 221 of the coil frame 22. The leg 242 extends from one end of the fixed portion 241. Hereinafter, the side where the leg 242 is located relative to the fixed portion 241 will also be referred to as the "right", and the side opposite thereto will also be referred to as the "left". That is, the leg 242 extends downward from the right end of the fixed portion 241. In addition, hereinafter, the direction orthogonal to the up-down direction and the left-right direction will also be referred to as the front-back direction.

[0040] like Figure 2 As shown, the leg portion 242 has a terminal portion 244, a first supporting portion 245 and a second supporting portion 246. The terminal portion 244, the first supporting portion 245 and the second supporting portion 246 extend downward from the fixing portion 241, respectively. That is, the yoke 24 has the terminal portion 244 and the first supporting portion 245 extending downward from the fixing portion 241, respectively, and also has the second supporting portion 246 extending downward from the fixing portion 241. The terminal portion 244 is located between the first supporting portion 245 and the second supporting portion 246 in the front-to-back direction. The front-to-back direction is the direction in which the first supporting portion 245 and the second supporting portion 246 are arranged. In the front-to-back direction, the first supporting portion 245 is located in front of the terminal portion 244, and the second supporting portion 246 is located in the rear of the terminal portion 244. As Figure 5 As shown, in the front-rear direction, a gap G1 is provided between the first support portion 245 and the terminal portion 244 , and a gap G2 is provided between the terminal portion 244 and the second support portion 246 .

[0041] The first supporting portion 245 includes a bent portion 2451, which is connected to the fixing portion 241 and is bent toward the lower right from the fixing portion 241. Figure 5As shown, the boundary line (first boundary line) L1 between the fixing portion 241 and the first supporting portion 245 is the boundary line between the flat upper surface 2410 of the fixing portion 241 and the curved upper surface of the curved portion 2451 included in the first supporting portion 245. Similarly, the boundary line (second boundary line) L2 between the fixing portion 241 and the second supporting portion 246 is the boundary line between the flat upper surface 2410 of the fixing portion 241 and the curved upper surface of the curved portion 2461 included in the second supporting portion 246. In addition, the boundary line (third boundary line) L3 between the fixing portion 241 and the terminal portion 244 is the boundary line between the flat upper surface 2410 of the fixing portion 241 and the curved upper surface of the curved portion 2441 included in the terminal portion 244.

[0042] like Figure 5 As shown, the first support portion 245 and the second support portion 246 extend downward from the fixing portion 241 starting from the same position in the left-right direction. In other words, both the first boundary line L1 and the second boundary line L2 are located on an imaginary line L10 connecting the first boundary line L1 and the second boundary line L2.

[0043] On the other hand, Figure 5 As shown, the terminal portion 244 extends downward from the fixed portion 241 starting from a position different from the first support portion 245 and the second support portion 246 in the left-right direction, and more specifically, extends downward from the fixed portion 241 starting from a position closer to the right side than each of the first support portion 245 and the second support portion 246. In other words, the third boundary line L3 is located at a position closer to the right side than the imaginary line L10 connecting the first boundary line L1 and the second boundary line L2. Therefore, the imaginary line L10 connecting the first boundary line L1 and the second boundary line L2 is located between the third boundary line L3 and the iron core 23. As a result, it is easy to position the base 350 of the movable spring 33 described later in the left-right direction between the first support portion 245 (or the second support portion 246) and the terminal portion 244.

[0044] 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.

[0045] like Figure 5As shown, in the front-to-back direction, the width W3 of the terminal portion 244 is larger than the width W1 of the first support portion 245. In addition, in the front-to-back direction, the width W3 of the terminal portion 244 is larger than the width W2 of the second support portion 246. Thus, the conductivity of the terminal portion 244 that functions as the common terminal 6 can be improved. In addition, the width W3 of the terminal portion 244 is the size of the terminal portion 244 in the width direction (front-to-back direction) orthogonal to the thickness direction and the extension direction of the terminal portion 244. Similarly, the width W1 of the first support portion 245 is the size of the first support portion 245 in the width direction (front-to-back direction) orthogonal to the thickness direction and the extension direction of the first support portion 245, and the width W2 of the second support portion 246 is the size of the second support portion 246 in the width direction (front-to-back direction) orthogonal to the thickness direction and the extension direction of the second support portion 246.

[0046] like Figure 2 to Figure 4 As shown, the armature 25 is formed of a magnetic material into a long flat plate shape. Figure 4 As shown in FIG. 1 , the armature 25 is arranged to face the lower surface 235 of the core 23. One end (right end) of the armature 25 is connected to the lower end 247 (refer to FIG. 1 ) of the first support portion 245 of the yoke 24. Figure 3 ) and the lower end 248 of the second support portion 246 (refer to Figure 4 ) in contact. That is, the lower end 247 of the first support portion 245 is in contact with the armature 25. In addition, the lower end 248 of the second support portion 246 is in contact with the armature 25. 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 is capable of rotating with the contact portion with the yoke 24 as a fulcrum. When the coil 21 is energized and magnetized, 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 using the spring force of the movable spring 33. That is, the armature 25 moves closer to or farther away from the core 23 according to the excitation of the coil 21.

[0047] like Figure 2 to Figure 4 As shown, the contact block 3 includes a fixed contact 31 , a movable contact 32 , and a movable spring 33 .

[0048] 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 by 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 to the fixed terminal 5.

[0049] like Figure 4 , Figure 6As shown, the movable contact 32 is provided on the movable spring 33. The movable contact 32 is formed independently of the movable spring 33 and is fixed to the movable spring 33, but is not limited thereto, and may be formed integrally with the movable spring 33 by the same material as the movable spring 33. The movable contact 32 is provided at a position opposite to the fixed contact 31.

[0050] The movable spring 33 is formed of a conductive material such as copper. Figure 2 to Figure 4 , Figure 6 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.

[0051] 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).

[0052] The extension part 35 is plate-shaped and extends upward from the second end (right end) of the movable part 34. The extension part 35 is fixed to the leg part 242 of the yoke 24. The extension part 35 is fixed to the first support part 245 and the second support part 246 of the leg part 242 by caulking, for example.

[0053] like Figure 2 to Figure 4 , Figure 6 As shown, the extension portion 35 includes a base 350, a first arm 351, and a second arm 352. The base 350 is plate-shaped and is fixed to the first support portion 245. 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 base 350 is located between the movable contact 32 and the terminal portion 244, and the first support portion 245 is located between the movable contact 32 and the base 350. In other words, the base 350 is located outside (right side) of the first support portion 245 and inside (left side) of the terminal portion 244.

[0054] In addition, the base 350 is also fixed to the second support portion 246. Since the base 350 is located outside (on the right side) of the second support portion 246, the second support portion 246 is located between the movable contact 32 and the base 350.

[0055] In addition, if Figure 4 , Figure 7As shown in the figure, the base 350 is separated from the terminal portion 244. That is, the base 350 is fixed to the first support portion 245 and the second support portion 246 and contacts them, but does not contact the terminal portion 244. As a result, the base 350 is not easy to rub against the terminal portion 244, so that the wear of the movable spring 33 can be suppressed. In addition, the operation of inserting the base 350 of the movable spring 33 from the bottom to the gap between the terminal portion 244 and the first support portion 245 (and the second support portion 246) becomes easy, and the assembly performance when the movable spring 33 is installed on the yoke 24 is improved.

[0056] In addition, if Figure 4 , Figure 7 As shown, the first arm portion 351 and the second arm portion 352 extend obliquely downward to the right from the lower end of the base portion 350, respectively. As a result, at least a portion of the terminal portion 244 is located between the first arm portion 351 and the second arm portion 352, and the first arm portion 351 and the second arm portion 352 overlap at least a portion of the terminal portion 244 in the front-to-back direction. The front-to-back direction is the direction in which the first arm portion 351 and the second arm portion 352 are arranged. In this way, by making the first arm portion 351 and the second arm portion 352 extend obliquely downward to the right from the lower end of the base portion 350, respectively, away from the movable contact 32, the length of the movable portion 34 becomes longer, and the elasticity (spring force) of the movable spring 33 can be increased.

[0057] like Figure 2 As shown in FIG. 1 , the movable spring 33 has a through hole 36 surrounded by the movable portion 34, the base 350, the first arm portion 351 and the second arm portion 352. Furthermore, by making the first arm portion 351 and the second arm portion 352 extend obliquely downward from the lower end of the base 350, as shown in FIG. Figure 2 , Figure 7 As shown, a part of the terminal portion 244 enters the through hole 36. Thus, when viewed in the front-rear direction, the first arm portion 351 overlaps with the terminal portion 244. Also, when viewed in the front-rear direction, the second arm portion 352 overlaps with the terminal portion 244.

[0058] 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 deenergized, 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 in the closed position (refer to Fig. 9 ) is separated from the disconnected position of the fixed contact 31 (refer to Figure 4 ) is moved between. A plate-shaped limiting portion 29 is arranged in the storage space 227 below the lower flange portion 223 of the coil frame 22 to limit the movable range of the movable spring 33 and define the disconnection position of the movable contact 32.

[0059] The main body 4 includes a substantially rectangular flat plate-shaped base 41 (see Figure 2 to Figure 5 , Figure 7 ) and a substantially rectangular box-shaped cover 42 (refer to Figure 1 The base 41 has an insertion hole 411 for inserting the fixed terminal 5, an insertion hole 412 for inserting the terminal portion 244 (common terminal 6) of the yoke 24, and a pair of insertion holes 413 for inserting the pair of coil terminals 7. The cover 42 has an opening on one surface (lower surface) and is mounted on the base 41 in a manner covering the base 41 from the upper 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.

[0060] The fixed terminal 5 is formed of a conductive material such as copper. The fixed terminal 5 has a fixed contact 31 and is connected to the outside (connection member). The fixed terminal 5 is held by the main body 4. In the electromagnetic relay 1 of this embodiment, the fixed terminal 5 is held by the lower flange portion 223 of the coil frame 22 and is held by the main body 4.

[0061] like Figure 4 , Figure 8 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.

[0062] The base 50 is a portion of the fixed terminal 5 that is held by the main body 4. The base 50 is a plate-shaped substantially L-shaped plate when viewed from the front. The fixed contact 31 is provided at the first end (left end) of the base 50. The second end (lower end) of the base 50 is connected to the first connecting portion 51. Figure 8 As shown, a through hole 501 for arranging the movable portion 34 of the movable spring 33 and the armature 25 is formed at the center of the base portion 50 .

[0063] 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 downward. The first connection portion 51 is connected to the connection member by, for example, being inserted into the connection member from above.

[0064] The first connecting portion 51 includes a plate-shaped first plate portion 81 and a plate-shaped second plate portion 82 in contact with the first plate portion 81. The first plate portion 81 and the second plate portion 82 are formed by a single plate-shaped member. The second plate portion 82 is formed by bending upward from the lower end 811 of the first plate portion 81 so as to overlap 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. The first plate portion 81 and the second plate portion 82 are arranged so as to overlap with each other in their respective thickness directions.

[0065] 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. The first protrusion 815 is substantially rectangular when viewed in the thickness direction of the first plate portion 81 (when viewed from the left side). In the first plate portion 81, the first protrusion 815 protrudes more than the remaining portion 819 of the first plate portion 81 in the thickness direction of the first plate portion 81.

[0066] 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. The second protrusion 825 is substantially rectangular when viewed in the thickness direction of the second plate portion 82 (when viewed from the right side). In the second plate portion 82, the second protrusion 825 protrudes more than the remaining portion 829 of the second plate portion 82 in the thickness direction of the second plate portion 82.

[0067] The common terminal 6 (terminal portion 244 of the yoke 24) is formed of a conductive material (magnetic material). 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 first support portion 245 and the second support portion 246 of the yoke 24, the common terminal 6 is electrically connected to the movable contact 32 via the yoke 24 and the movable spring 33.

[0068] The common terminal 6 (terminal portion 244 ) 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 .

[0069] like Figure 4 As shown, the common terminal 6 (terminal portion 244) has a second connection portion 61 connected to the outside (connection member). The second connection portion 61 is exposed from the body 4 and protrudes downward. The second connection portion 61 is connected to the connection member by, for example, being inserted into the connection member from above.

[0070] 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 4 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 by the body 4. The coil terminal 7 is inserted into the insertion hole 413 of the base 41 and held by the base 41.

[0071] like Figure 4As 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.

[0072] The base 70 is a portion of the coil terminal 7 that is held by the body 4. The base 70 is inserted into the insertion hole 413 of the base 41. The coil portion 72 is connected to the upper end of the base 70.

[0073] 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 lower end of the base 70. The third connection portion 71 is exposed from the body 4 and protrudes downward. The third connection portion 71 is connected to the connection member by, for example, being inserted into the connection member from above.

[0074] The first connection portion 51, the second connection portion 61, and the third connection portion 71 all extend downward from the main body 4. That is, the extension 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 along the extension direction of the iron core 23.

[0075] In each of the first connecting portion 51, the second connecting portion 61, and the third connecting portion 71, an inclined surface is formed at the top end portion in such a manner that the dimension in the thickness direction gradually decreases toward the top end (lower end). In addition, in each of the first connecting portion 51, the second connecting portion 61, and the third connecting 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 (lower end).

[0076] Next, refer to Figure 4 , Fig. 9 The operation of electromagnetic relay 1 according to the present embodiment will be described.

[0077] Before energizing the coil 21, Figure 4 As shown, the armature 25 is separated from the iron core 23 by the spring force of the movable spring 33, and the movable contact 32 is separated from the fixed contact 31 (the movable contact 32 is in the open position).

[0078] 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 ). Fig. 9: 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 first support portion 245 and the second support portion 246 of the yoke 24, and the terminal portion 244 (common terminal 6) of the yoke 24.

[0079] 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 As a result, the movable contact 32 and the fixed contact 31 can be electrically disconnected.

[0080] In the electromagnetic relay 1 of the present embodiment, the yoke 24 has a terminal portion 244, which functions as a terminal (common terminal 6) connected to the outside (connecting member) when current flows through the movable contact 32. In addition, the contact portion (lower end 247 of the first support portion 245) of the yoke 24 with the armature 25 can be used as a fulcrum of the hinge when the armature 25 rotates. In addition, the fixed portion 241 and the first support portion 245 of the yoke 24 can form a magnetic circuit together with the iron core 23 and the armature 25, and the magnetic circuit is used for the magnetic field generated in the coil 21 to pass. In short, in the electromagnetic relay 1 of the present embodiment, the yoke 24 has the function of forming a magnetic circuit, the function as a fulcrum of the hinge structure of the armature 25, and the function as a terminal connected to the outside (connecting member). As a result, compared with the case where each function is realized by different components, the number of components can be reduced.

[0081] In addition, in the electromagnetic relay 1 of the present embodiment, the yoke 24 has a second support portion 246 in addition to the first support portion 245. Thus, the second support portion 246 constitutes a magnetic path parallel to the first support portion 245, so that the magnetic resistance of the magnetic path can be reduced. In addition, the lower end 247 of the first support portion 245 and the lower end 248 of the second support portion 246 can both be set as the fulcrum of the hinge of the armature 25, which can improve the stability of the support of the armature 25.

[0082] In the electromagnetic relay 1 of the present embodiment, the extension portion 35 of the movable spring 33 has the base portion 350 fixed to the first support portion 245 and the second support portion 246. Thus, the current flowing between the terminal portion 244 and the movable contact 32 can flow through the movable portion 34 and the extension portion 35 of the movable spring 33.

[0083] (2) Modification

[0084] 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.

[0085] (2.1) Modification 1

[0086] In the electromagnetic relay 1 of this modification, as Fig.10 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 fixed to the terminal portion 244. 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. In addition, the terminal portion 244 is inserted into the through hole 36 and is located between the movable contact 32 and the base 350. In other words, the base 350 of the movable spring 33 is located outside (on the right side) of the terminal portion 244.

[0087] In the electromagnetic relay 1 of this modification, the base 350 of the movable spring 33 can be mounted outside the terminal portion 244. Therefore, compared with the electromagnetic relay 1 of the embodiment, the installation work of the movable spring 33 to the yoke 24 becomes easier, and the manufacturing process can be simplified.

[0088] In addition, in the electromagnetic relay 1 of this modified example, the base 350 of the movable spring 33 is located outside the terminal portion 244. As a result, the distance between the portion of the movable spring 33 that becomes the center of rotation of the movable portion 34 and the movable contact 32 can be increased, and the spring force of the movable spring 33 for pressing the movable contact 32 toward the fixed contact 31 can be increased.

[0089] (2.2) Modification 2

[0090] like Fig.11 , Fig.12 As shown, in the electromagnetic relay 1 of this modified example, the bent portion 2451 of the first support portion 245, the bent portion 2441 of the terminal portion 244, and the bent portion 2461 of the second support portion 246 are connected in the front-to-back direction. Thus, the terminal portion 244, the first support portion 245, and the second support portion 246 extend integrally from the fixing portion 241 downward. More specifically, as Fig.12As shown, the upper surface 2410 of the fixing portion 241 is flat. Furthermore, the third boundary line L3 between the fixing portion 241 and the terminal portion 244 is located on an imaginary line L20 connecting the first boundary line L1 between the fixing portion 241 and the first supporting portion 245 and the second boundary line L2 between the fixing portion 241 and the second supporting portion 246.

[0091] In addition, if Fig.11 As shown in the figure, the base 350 of the extension portion 35 of the movable spring 33 is fixed to at least one of the terminal portion 244, the first support portion 245 and the second support portion 246, and is fixed to the first support portion 245 and the second support portion 246. In addition, the terminal portion 244 is inserted into the through hole 36 surrounded by the movable portion 34, the base 350, the first arm portion 351 and the second arm portion 352, and is located between the movable contact 32 and the base 350. In other words, the base 350 of the movable spring 33 is located outside (on the right side) of the terminal portion 244.

[0092] In the electromagnetic relay 1 of this modification, the terminal portion 244, the first support portion 245, and the second support portion 246 extend integrally. Thus, the shape of the yoke 24 can be simplified compared to the electromagnetic relay 1 of the modification 1, and the manufacturing process of the yoke 24 can be simplified.

[0093] In addition, base portion 350 of movable spring 33 is located outside terminal portion 244. Thus, the spring force of movable spring 33 for pressing movable contact 32 toward fixed contact 31 can be increased.

[0094] In addition, the base 350 is fixed to the first support portion 245 and the second support portion 246. Thus, compared with the case where the base 350 is fixed to the terminal portion 244, the stability of the movable spring 33 held by the yoke 24 can be improved.

[0095] In addition, the first arm 351 and the second arm 352 extend obliquely downward and rightward (away from the movable contact 32) from the lower end of the base 350. Thus, the length of the movable portion 34 is increased, and the spring force of the movable spring 33 for pressing the movable contact 32 toward the fixed contact 31 can be increased.

[0096] (2.3) Other variations

[0097] In a modified example, the terminal portion 244 may be in a Y-shape, and the first support portion 245 may be located in a hollow portion surrounded by an upper portion of the Y-shape of the terminal portion 244 .

[0098] In a modified example, the first boundary line L1 and the second boundary line L2 may not be located on the same imaginary line, but may be located at positions slightly offset in the left-right direction. In this case, the imaginary line L10 connecting the first boundary line L1 and the second boundary line L2 may be, for example, an imaginary line connecting the rear end of the first boundary line L1 (the end of the first boundary line L1 close to the second boundary line L2) and the front end of the second boundary line L2 (the end of the second boundary line L2 close to the first boundary line L1).

[0099] (3) Method

[0100] As is apparent from the above-described embodiment and modified examples, the following aspects are disclosed in this specification.

[0101] 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, and a fixed terminal 5. 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 is fixed to the upper end portion 234 of the iron core 23. 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 extension 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 the first end of the movable portion 34. The extension portion 35 extends upward from the second end of the movable portion 34. The fixed terminal 5 has a fixed contact 31 opposite to the movable contact 32, and the fixed terminal 5 is connected to the outside. The yoke 24 has a fixed portion 241, a terminal portion 244, and a first support portion 245. The fixed portion 241 is located above the upper flange portion 222 and is fixed to the upper end portion 234 of the core 23. The terminal portion 244 extends downward from the fixed portion 241 and is connected to the outside. The first support portion 245 extends downward from the fixed portion 241. The lower end 247 of the first support portion 245 contacts the armature 25.

[0102] According to this aspect, the number of components can be reduced.

[0103] In the electromagnetic relay 1 of the second embodiment, in addition to the first embodiment, 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 fixed to the first support portion 245. 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 base 350 is located between the movable contact 32 and the terminal portion 244, and the first support portion 245 is located between the movable contact 32 and the base 350.

[0104] According to this aspect, the number of components can be reduced.

[0105] The electromagnetic relay 1 according to the third embodiment is the same as the electromagnetic relay 1 according to the second embodiment, in which the base portion 350 and the terminal portion 244 are separated from each other.

[0106] According to this embodiment, wear of the movable spring 33 can be suppressed, and the assembling efficiency when the movable spring 33 is attached to the yoke 24 is improved.

[0107] In the electromagnetic relay 1 of the fourth embodiment, in addition to the first embodiment, 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 fixed to the terminal portion 244. 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. The terminal portion 244 is located between the movable contact 32 and the base 350. The terminal portion 244 is inserted into the through hole 36.

[0108] According to this embodiment, the manufacturing process of electromagnetic relay 1 can be simplified, and the spring force of movable spring 33 for pressing movable contact 32 toward fixed contact 31 can be increased.

[0109] In the electromagnetic relay 1 of the fifth aspect, based on any one of the second to fourth aspects, at least a portion of the terminal portion 244 is located between the first arm portion 351 and the second arm portion 352, and overlaps with the first arm portion 351 and the second arm portion 352 in the direction in which the first arm portion 351 and the second arm portion 352 are arranged.

[0110] According to this aspect, the elasticity (spring force) of the movable spring 33 can be increased.

[0111] The electromagnetic relay 1 of the sixth aspect is one of the first to fifth aspects, wherein the yoke 24 further includes a second support portion 246 extending downward from the fixing portion 241. The terminal portion 244 is located between the first support portion 245 and the second support portion 246. The lower end 248 of the second support portion 246 contacts the armature 25.

[0112] According to this aspect, the magnetic resistance of the magnetic circuit can be reduced, and the stability of the support of the armature 25 can be improved.

[0113] The electromagnetic relay 1 of the seventh embodiment is configured in accordance with the sixth embodiment, wherein the upper surface 2410 of the fixing portion 241 is flat. An imaginary line L10 connecting a first boundary line L1 between the fixing portion 241 and the first support portion 245 and a second boundary line L2 between the fixing portion 241 and the second support portion 246 is located between a third boundary line L3 between the fixing portion 241 and the terminal portion 244 and the iron core 23.

[0114] According to this aspect, the number of components can be reduced.

[0115] In the electromagnetic relay 1 of the eighth embodiment, in addition to the first embodiment, the yoke 24 further includes a second support portion 246 extending downward from the fixed portion 241. The terminal portion 244 is located between the first support portion 245 and the second support portion 246. The terminal portion 244, the first support portion 245 and the second support portion 246 extend downward from the fixed portion 241 in an integral manner. The lower end 248 of the second support portion 246 contacts the armature 25. The extension portion 35 of the movable spring 33 includes a base 350, a first arm portion 351 and a second arm portion 352. The base 350 is fixed to at least one of the terminal portion 244, the first support portion 245 and the second support portion 246. The first arm portion 351 extends downward from the base 350 and is connected to the movable portion 34. The second arm portion 352 extends downward from the base 350 and is connected to the movable portion 34. The movable spring 33 has a through hole 36 surrounded by the movable portion 34, the base 350, the first arm 351, and the second arm 352. The terminal portion 244 is located between the movable contact 32 and the base 350. The terminal portion 244 is inserted into the through hole 36.

[0116] According to this aspect, the manufacturing process of the yoke 24 can be simplified.

[0117] In the electromagnetic relay 1 of the ninth aspect, in addition to the eighth aspect, the upper surface 2410 of the fixing portion 241 is flat. The third boundary line L3 between the fixing portion 241 and the terminal portion 244 is located on an imaginary line L20 connecting the first boundary line L1 between the fixing portion 241 and the first supporting portion 245 and the second boundary line L2 between the fixing portion 241 and the second supporting portion 246.

[0118] According to this aspect, the manufacturing process of the yoke 24 can be simplified.

[0119] In the electromagnetic relay 1 of the tenth aspect, in addition to any one of the first to ninth aspects, the width of the terminal portion 244 is larger than the width of the first support portion 245 in the front-rear direction.

[0120] According to this aspect, the conductivity of the terminal portion 244 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 fixed to the upper end of the core; 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 extending portion, wherein the movable portion is located below the armature and fixed to the armature and has a movable contact at a first end of the movable portion, and the extending portion extends upward from a second end of the movable portion; and a fixed terminal having a fixed contact opposite to the movable contact and connected to the outside, The yoke has: a fixing portion, which is located above the upper flange portion and is fixed to the upper end portion of the core; A terminal portion extending downward from the fixing portion and connected to the outside; as well as a first supporting portion extending downward from the fixing portion, The lower end of the first support portion is in contact with the armature.

2. The electromagnetic relay according to claim 1, wherein: The extending portion of the movable spring has: A base portion fixed to the first supporting portion; a first arm portion extending downward from the base portion and connected to the movable portion; and a second arm portion extending downward from the base portion and connected to the movable portion, The base portion is located between the movable contact and the terminal portion, and the first support portion is located between the movable contact and the base portion.

3. The electromagnetic relay according to claim 2, wherein: The base is spaced apart from the terminal portion.

4. The electromagnetic relay according to claim 1, wherein: The extending portion of the movable spring has: a base portion fixed to the terminal portion; a first arm portion extending downward from the base portion and connected to the movable portion; and a second arm portion extending downward from the base portion and connected to the movable portion, The movable spring has a through hole surrounded by the movable portion, the base portion, the first arm portion, and the second arm portion. The terminal portion is located between the movable contact and the base portion, The terminal portion is inserted into the through hole.

5. The electromagnetic relay according to any one of claims 2 to 4, wherein: At least a portion of the terminal portion is located between the first arm portion and the second arm portion, and overlaps with the first arm portion and the second arm portion in a direction in which the first arm portion and the second arm portion are arranged.

6. The electromagnetic relay according to any one of claims 1 to 5, wherein: The yoke further includes a second supporting portion extending downward from the fixing portion. The terminal portion is located between the first supporting portion and the second supporting portion. The lower end of the second supporting portion is in contact with the armature.

7. The electromagnetic relay according to claim 6, wherein: The upper surface of the fixing portion is flat, An imaginary line connecting a first boundary line between the fixing portion and the first supporting portion and a second boundary line between the fixing portion and the second supporting portion is located between a third boundary line between the fixing portion and the terminal portion and the iron core.

8. The electromagnetic relay according to claim 1, wherein: The yoke further includes a second supporting portion extending downward from the fixing portion. The terminal portion is located between the first supporting portion and the second supporting portion. The terminal portion, the first supporting portion, and the second supporting portion integrally extend downward from the fixing portion. The lower end of the second support portion contacts the armature. The extending portion of the movable spring has: a base portion fixed to at least one of the terminal portion, the first supporting portion, and the second supporting portion; a first arm portion extending downward from the base portion and connected to the movable portion; and a second arm portion extending downward from the base portion and connected to the movable portion, The movable spring has a through hole surrounded by the movable portion, the base portion, the first arm portion, and the second arm portion. The terminal portion is located between the movable contact and the base portion, The terminal portion is inserted into the through hole.

9. The electromagnetic relay according to claim 8, wherein: The upper surface of the fixing portion is flat, The third boundary line between the fixing portion and the terminal portion is located on an imaginary line connecting the first boundary line between the fixing portion and the first supporting portion and the second boundary line between the fixing portion and the second supporting portion.

10. The electromagnetic relay according to any one of claims 1 to 9, wherein: The width of the terminal portion is greater than the width of the first supporting portion.

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