Electromagnetic relays

Abstract

To provide an electromagnetic relay which suppresses backlash of a card and behaves stably.SOLUTION: The electromagnetic relay includes a base, a fixation terminal, a movable contact piece, an electromagnet device, a movable iron piece, a card, and a first guide rail. The fixation terminal includes a fixation contact point. The movable contact piece includes a movable contact point. The movable iron piece rotates from a first position to a second position by being absorbed to the electromagnet device. The card can move to movement directions including a first direction from the fixation contact point to the movable contact point and a second direction opposite to the first direction. The card presses the movable contact piece in such a manner that the movable iron piece rotates from the first direction to the second direction. The first guide rail guides movement of the card. The card includes a card body and a first sliding protrusion. The card body is placed away from the first guide rail in the height direction of the base. The first sliding protrusion allows for displacement of the card body in the height direction of the base when the movable iron piece rotates from the second position to the first position.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an electromagnetic relay. [Background technology]

[0002] Patent Document 1 discloses an electromagnetic relay including a base, a contact device, an electromagnet device, a movable iron piece, and a card. The movable iron piece is rotatable between a first position and a second position, and is rotated from the first position to the second position by being attracted by the electromagnet device. The card is connected to the movable iron piece, and is pressed against the movable iron piece by the rotation of the movable iron piece. As a result, the card moves and presses the movable contact piece of the contact device, causing the movable contact of the contact device to contact the fixed contact.

[0003] The base includes a pair of guide rails that guide the movement of the card. The card includes a pair of first protrusions and a pair of second protrusions that are positioned closer to the movable iron piece than the pair of first protrusions. The pair of first protrusions and the pair of second protrusions are always in contact with the pair of guide rails, preventing the card from shifting in position in the height direction of the base when the movable iron core rotates. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-235063 Summary of the Invention [Problem to be solved by the invention]

[0005] In the electromagnetic relay of Patent Document 1, when the electromagnet device rotates from the second position to the first position, a pair of first protrusions and a pair of second protrusions prevent the card from shifting in the height direction of the base. In this configuration, to prevent interference between the card and the movable iron piece and hindering the rotation of the movable iron piece when the electromagnet device rotates from the second position to the first position, it is necessary to provide a sufficient gap between the card and the movable iron piece at the portion where the card and the movable iron piece are connected to allow the rotation of the movable iron piece. However, if the gap between the card and the movable iron piece is made larger, the card will become more wobbly.

[0006] An object of the present invention is to provide an electromagnetic relay that suppresses rattle of the card and has stable behavior. [Means for solving the problem]

[0007] An electromagnetic relay according to one aspect of the present invention includes a base, a fixed terminal, a movable contact piece, an electromagnet device, a movable iron piece, a card, and a first guide rail. The fixed terminal includes a fixed contact and is supported by the base. The movable contact piece includes a movable contact arranged opposite the fixed contact and is supported by the base. The electromagnet device is disposed on the base. The movable iron piece is rotatable between a first position and a second position and rotates from the first position to the second position by being attracted by the electromagnet device. The card is movable in movement directions including a first direction from the fixed contact toward the movable contact and a second direction opposite to the first direction. The card is connected to the movable iron piece, and the movable iron piece presses the movable contact piece as it rotates from the first position to the second position. The first guide rail extends in the movement direction of the card and guides movement of the card in the first and second directions. The card includes a card body and a first sliding protrusion. The card body is spaced apart from the first guide rail in a height direction of the base that intersects with the direction of card movement. The first sliding protrusion allows the card body to be displaced in the height direction of the base when the movable iron piece rotates from the second position to the first position.

[0008] In this electromagnetic relay, when the movable iron piece rotates from the second position to the first position, the first sliding protrusion allows for misalignment of the card body in the height direction of the base. This allows the card to tilt in conjunction with the movable iron piece when the movable iron piece rotates from the second position to the first position, thereby reducing the gap between the card and the movable iron piece that allows for the rotation of the movable iron piece. This prevents interference with the rotation of the movable iron piece and suppresses wobble of the card. As a result, the operation of the card is stabilized, and the behavior of the electromagnetic relay is also stabilized.

[0009] The card may include a pressing portion capable of pressing the movable contact piece and a pressed portion that is pressed in a first direction by the movable iron piece when the movable iron piece rotates from a first position to a second position. The first sliding protrusion may be disposed between the pressing portion and the pressed portion. The distance from the first sliding protrusion to the pressing portion may be shorter than the distance from the first sliding protrusion to the pressed portion. In this case, it is possible to further prevent the rotation of the movable iron piece from being hindered.

[0010] The electromagnetic relay may further include a second guide rail disposed at a distance from the first guide rail in a direction intersecting the card movement direction and the height direction of the base. The card may further include a second sliding protrusion protruding from the card body and slidably supported by the second guide rail. The second sliding protrusion may allow for positional deviation of the card body in the height direction of the base when the movable iron piece rotates from the second position to the first position. In this case, the card can be stably supported.

[0011] The number of first sliding protrusions may be one. The number of second sliding protrusions may be one. In this case, it is possible to suppress the generation of wear powder due to the sliding of the first sliding protrusions and the sliding of the second sliding protrusions.

[0012] The movable iron piece may include a support portion that contacts and supports the card. In this case, the support portion of the movable iron piece can stably support the card, thereby preventing interference with the rotation of the movable iron piece and further reducing wobbling of the card.

[0013] The card may further include a supported portion supported by the supporting portion of the movable iron piece. The supported portion of the card may include a pair of contact portions that contact the supporting portion of the movable iron piece. In this case, the card can be more stably supported by the supporting portion of the movable iron piece.

[0014] The electromagnetic device may include an iron core. The movable iron piece may further include a protrusion that can come into contact with the iron core of the electromagnetic device. The supported portion of the card may further include a recess that is disposed between the pair of contact portions and recessed in the height direction of the base from the support portion of the movable iron piece. In this case, for example, when the protrusion portion of the movable iron piece is formed by hammering, even if a part of the movable iron piece rises toward the card, the support portion of the movable iron piece can stably support the card.

[0015] The card may be positioned at a distance from the movable contact piece in the height direction of the base, which prevents the rotation of the movable iron piece from being hindered and also prevents wear powder from being generated between the movable contact piece of the card and the movable iron piece.

[0016] According to the present invention, it is possible to provide an electromagnetic relay that suppresses rattle of the card and has stable behavior. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. [Figure 6] 6 is a partial cross-sectional view of the electromagnetic relay of FIG. 5 taken along line VI-VI. [Figure 7] 7 is a partial cross-sectional view of the electromagnetic relay of FIG. 5 taken along line VII-VII. [Figure 8] FIG. [Figure 9] 10A and 10B are diagrams for explaining the state of the card when the movable iron piece is rotating. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, an embodiment of an electromagnetic relay according to one aspect of the present invention will be described with reference to the drawings. In each drawing, the X1 direction will be described as the leftward direction, the X2 direction as the rightward direction, the Y1 direction as the forward direction, the Y2 direction as the backward direction, the Z1 direction as the upward direction, and the Z2 direction as the downward direction. These directions are defined for the convenience of explanation and do not limit the arrangement direction of the electromagnetic relay. In this embodiment, the Y1 direction is an example of a first direction, and the Y2 direction is an example of a second direction.

[0019] As shown in FIGS. 1 to 3, the electromagnetic relay 1 includes a base 2, a contact device 3, an electromagnet device 4, a movable iron piece 5, a hinge spring 6, and a card .

[0020] The base 2 is made of an insulating material such as resin. The base 2 is formed so that the dimension in the front-to-rear direction is larger than the dimension in the left-to-right direction. Note that the dimensions of the base 2 in the front-to-rear direction and the left-to-right direction may be approximately the same, or the dimension in the left-to-right direction may be larger than the dimension in the front-to-rear direction.

[0021] The base 2 includes a bottom 21 and base side walls 22. The bottom 21 is generally rectangular when viewed from the top-bottom direction. The base side walls 22 extend upward from the outer edge of the bottom 21. The base side walls 22 include a front wall 22a, a left wall 22b, and a right wall 22c. The front wall 22a extends in a direction intersecting the front-rear direction. The left wall 22b and the right wall 22c extend in a direction intersecting the left-right direction. The storage section 23 extends in the front-rear direction and is formed in a cylindrical shape with a bottom that opens toward the rear. The storage section 23 protrudes upward from the bottom 21, the left wall 22b, and the right wall 22c. The electromagnetic relay 1 includes a case (not shown) that is placed over the base 2 from above.

[0022] The contact device 3 is disposed on the base 2. The contact device 3 is supported by the base 2. The contact device 3 is disposed in front of the electromagnet device 4.

[0023] The contact device 3 includes a first fixed terminal 8, a second fixed terminal 9, and a movable contact piece 10. The first fixed terminal 8, the second fixed terminal 9, and the movable contact piece 10 are plate-shaped terminals made of a conductive material.

[0024] The first fixed terminal 8 is supported by the base 2. The first fixed terminal 8 passes through the bottom 21 of the base 2 in the up-down direction. The first fixed terminal 8 includes a first fixed contact 8a. The first fixed contact 8a is disposed on the rear surface of the first fixed terminal 8. The first fixed terminal 8 is an example of a fixed terminal, and the first fixed contact 8a is an example of a fixed contact.

[0025] The second fixed terminal 9 is disposed behind the first fixed terminal 8. The second fixed terminal 9 is supported by the base 2. The second fixed terminal 9 passes through the bottom 21 of the base 2 in the vertical direction. The second fixed terminal 9 includes a second fixed contact 9a. The second fixed contact 9a is disposed on the front surface of the second fixed terminal 9.

[0026] The movable contact piece 10 is disposed between the first fixed terminal 8 and the second fixed terminal 9. The movable contact piece 10 is supported by the base 2. The movable contact piece 10 penetrates the bottom 21 of the base 2 in the up-down direction. The movable contact piece 10 includes a first movable contact 10a and a second movable contact 10b. The first movable contact 10a is an example of a movable contact. The first movable contact 10a is disposed opposite the first fixed contact 8a in the front-rear direction and is capable of contacting the first fixed contact 8a. The second movable contact 10b is disposed opposite the second fixed contact 9a in the front-rear direction and is capable of contacting the second fixed contact 9a.

[0027] The electromagnet device 4 moves the card 7 by electromagnetic force. The electromagnet device 4 is disposed on the base 2. The electromagnet device 4 is supported by the base 2. The electromagnet device 4 includes a coil 41, a spool 42, an iron core 43, and a yoke 44.

[0028] The coil 41 is wound around the outer periphery of the spool 42. The spool 42 extends in the front-rear direction. The iron core 43 is cylindrical and is inserted into the inner periphery of the spool 42. The rear end of the iron core 43 is a magnetic pole face and is disposed opposite the movable iron piece 5 in the front-rear direction.

[0029] The yoke 44 is disposed around the coil 41. The yoke 44 has a bent shape. The yoke 44 is substantially L-shaped and is formed, for example, by press working. The yoke 44 is disposed below and in front of the coil 41. The yoke 44 is connected to the front end of the iron core 43.

[0030] The movable iron piece 5 is arranged facing the electromagnet device 4 in the front-rear direction. The movable iron piece 5 is arranged behind the iron core 43. The movable iron piece 5 is rotatably supported by the hinge spring 6. The movable iron piece 5 is in contact with the rear end of the yoke 44 and rotates around the rear end of the yoke 44 as a rotation fulcrum. The movable iron piece 5 is rotatable between a first position shown in FIG. 2 and a second position shown schematically in FIG. 4. The movable iron piece 5 rotates from the first position toward the second position by being attracted to the electromagnet device 4. The upper part of the movable iron piece 5 is connected to the card 7.

[0031] When the movable iron piece 5 is in the first position, the first movable contact 10a is in an open state where it is separated from the first fixed contact 8a. In the open state, the second movable contact 10b is in contact with the second fixed contact 9a. When the movable iron piece 5 is in the second position, the first movable contact 10a is in contact with the first fixed contact 8a. In the contact state, the second movable contact 10b is separated from the second fixed contact 9a.

[0032] 5 to 7, the movable iron piece 5 includes a crimping portion 51, a locking recess 52, a first pressing portion 53, a second pressing portion 54, and a protrusion 55. The crimping portion 51 is a portion that is attached to the hinge spring 6, and is, for example, a protrusion for crimping. The locking recess 52 is disposed on the upper rear surface of the movable iron piece 5. The locking recess 52 has a shape that is recessed from rear to front when viewed from the left-right direction.

[0033] The locking recess 52 includes a locking claw 52a and a support portion 52b. The locking claw 52a is located in the center of the movable iron piece 5 in the left-right direction. The locking claw 52a protrudes rearward from the upper part of the rear surface of the movable contact piece 10. The locking claw 52a protrudes rearward further than the second pressing portion 54. The support portion 52b contacts and supports the card 7. The support portion 52b is a step portion formed on the rear surface of the movable iron piece 5. The support portion 52b is spaced apart from the locking claw 52a in the up-down direction. The support portion 52b faces the locking claw 52a in the up-down direction. The support portion 52b is located below the locking claw 52a. The support portion 52b extends further left-right than the locking claw 52a.

[0034] The first pressing portion 53 presses the card 7 forward as the movable iron piece 5 rotates from the first position to the second position. The first pressing portion 53 is located at the upper front surface of the movable iron piece 5. The second pressing portion 54 is located at the upper rear surface of the movable iron piece 5. The second pressing portion 54 is located on the back surface side of the first pressing portion 53. The second pressing portion 54 presses the card 7 backward as the movable iron piece 5 rotates from the second position to the first position. When the movable iron piece 5 is in the second position, the second pressing portion 54 is in contact with the card 7.

[0035] The protrusion 55 is capable of contacting the iron core 43 of the electromagnet device 4. The protrusion 55 contacts the iron core 43 of the electromagnet device 4 when the movable iron piece 5 is in the second position. The protrusion 55 is arranged on the front surface of the movable iron piece 5. The protrusion 55 is arranged in close proximity to the support portion 52b. The protrusion 55 is arranged below the support portion 52b. The protrusion 55 is formed by, for example, hammering. The protrusion 55 has a hemispherical shape.

[0036] The hinge spring 6 biases the movable iron piece 5 in a direction away from the electromagnet device 4. The hinge spring 6 biases the movable iron piece 5 in a direction away from the iron core 43.

[0037] The card 7 is made of an insulating material such as resin. The card 7 is disposed above the electromagnet device 4. The card 7 is movable in a first direction from the first movable contact 10a to the first fixed contact 8a and a second direction opposite to the first direction. The second direction is the direction from the first fixed contact 8a to the first movable contact 10a. In this embodiment, the card 7 is movable in the front-rear direction. The card 7 is connected to the movable iron piece 5, and the movable iron piece 5 rotates from the first position to the second position to press the movable contact piece 10 in the first direction. The card 7 is disposed away from the movable contact piece 10 in the height direction of the base 2 (here, the Z1 direction). The card 7 is not in contact with the movable contact piece 10 in the up-down direction.

[0038] As shown in FIGS. 1 to 4 , the electromagnetic relay 1 includes a first guide rail 31 and a second guide rail 32. The first guide rail 31 and the second guide rail 32 extend in the front-rear direction and guide the movement of the card 7 in the front-rear direction. The first guide rail 31 and the second guide rail 32 are integrally formed with the base 2. The first guide rail 31 and the second guide rail 32 are stepped portions formed on the upper surface of the storage section 23 of the base 2. The first guide rail 31 and the second guide rail 32 have a shape that is concave from top to bottom. The first guide rail 31 and the second guide rail 32 are separated from each other in the left-right direction. The first guide rail 31 is disposed at the left end of the upper surface of the storage section 23. The second guide rail 32 is disposed at the right end of the upper surface of the storage section 23. The center of the upper surface of the storage section 23 protrudes upward beyond the first guide rail 31 and the second guide rail 32.

[0039] 2, 3, and 8, the card 7 includes a card body 71, pressing portions 72a and 72b, guide protrusions 73a and 73b, and pressed portions 74a and 74b. The card body 71 is disposed away from the first guide rail 31 in the height direction of the base 2. The card body 71 is disposed away from the second guide rail 32 in the height direction of the base 2. In other words, the card body 71 does not contact the first guide rail 31 or the second guide rail 32 in the up-down direction.

[0040] Specifically, the card body 71 includes a first extending portion 71a, a second extending portion 71b, and connecting portions 71c and 71d. The first extending portion 71a and the second extending portion 71b extend in the front-to-rear direction. The first extending portion 71a is disposed above the first guide rail 31. The first extending portion 71a is spaced apart from the first guide rail 31 in the up-down direction.

[0041] The second extending portion 71b has a shape symmetrical to the first extending portion 71a in the left-right direction. The second extending portion 71b is disposed above the second guide rail 32. The second extending portion 71b is separated from the second guide rail 32 in the up-down direction.

[0042] The connecting portions 71c, 71d extend in the left-right direction. The connecting portion 71c connects the front end of the first extending portion 71a to the front end of the second extending portion 71b. The connecting portion 71c is disposed forward of the first guide rail 31 and the second guide rail 32. The connecting portion 71c has a protrusion 71e that protrudes rearward. The protrusion 71e is formed in the center of the connecting portion 71c in the left-right direction. As shown in FIG. 1, the protrusion 71e contacts the front surface of the accommodating portion 23 of the base 2 in the open state. The connecting portion 71d connects the rear end of the first extending portion 71a to the rear end of the second extending portion 71b. The connecting portion 71d is disposed rearward of the movable iron piece 5.

[0043] The pressing portions 72a and 72b are capable of pressing the movable contact piece 10. The pressing portion 72a protrudes forward from the first extending portion 71a. The pressing portion 72b protrudes forward from the second extending portion 71b. The pressing portions 72a and 72b are separated from the movable contact piece 10 in the separated state, and are in contact with the rear surface of the movable contact piece 10 in the contact state.

[0044] The guide protrusion 73a protrudes forward from the pressing portion 72a and passes through a notch hole 10c formed in the movable contact piece 10. The notch hole 10c is formed so as to cut out a portion of the left end of the movable contact piece 10. The guide protrusion 73a is positioned away from the inner edge of the notch hole 10c. The guide protrusion 73b protrudes forward from the pressing portion 72b and passes through a notch hole 10d formed in the movable contact piece 10. The notch hole 10d is formed so as to cut out a portion of the right end of the movable contact piece 10. The guide protrusion 73b is positioned away from the inner edge of the notch hole 10d.

[0045] As shown in FIG. 7 , the pressed portion 74a is disposed in front of the first pressing portion 53. The pressed portion 74a is disposed facing the first pressing portion 53 in the front-rear direction. The pressed portion 74a protrudes from the inside of the first extending portion 71a toward the second extending portion 71b, and protrudes from the inside of the second extending portion 71b toward the first extending portion 71a. The pressed portion 74a is pressed forward by the first pressing portion 53 as the movable iron piece 5 rotates from the first position toward the second position. In the separated state, the pressed portion 74a is separated from the first pressing portion 53 in the front-rear direction.

[0046] The pressed portion 74b is arranged behind the pressed portion 74a. The pressed portion 74b faces the pressed portion 74a in the front-rear direction. The pressed portion 74b is formed by a part of the front surface of the connecting portion 71d. The pressed portion 74b is arranged behind the second pressing portion 54. The pressed portion 74b faces the second pressing portion 54 in the front-rear direction. The pressed portion 74b is pressed rearward by the second pressing portion 54 when the movable iron piece 5 rotates from the second position toward the first position. In the separated state, the pressed portion 74a is pressed rearward by the second pressing portion 54.

[0047] The card 7 further includes a first sliding protrusion 75, a second sliding protrusion 76, a supported portion 77, and a plurality of guide portions 78.

[0048] The first sliding protrusion 75 is slidably supported by the first guide rail 31. The first sliding protrusion 75 protrudes downward from the first extending portion 71a of the card body 71. The first sliding protrusion 75 has an arc shape. The first sliding protrusion 75 is in approximate line contact with the first guide rail 31. The first sliding protrusion 75 is always in contact with the first guide rail 31 when the movable iron piece 5 rotates. The first sliding protrusion 75 is disposed between the pressing portion 72a and the pressed portion 74a.

[0049] 8, the distance from the first sliding protrusion 75 to the pressing portion 72a is shorter than the distance from the first sliding protrusion 75 to the pressed portion 74a. That is, the first sliding protrusion 75 is disposed closer to the pressing portion 72a than the center between the pressing portion 72a and the pressed portion 74a in the front-rear direction. In this embodiment, there is one first sliding protrusion 75. That is, in this embodiment, the first extending portion 71a of the card body 71 is supported at one point on the first guide rail 31 by the first sliding protrusion 75.

[0050] The first sliding protrusion 75 allows the card body 71 to be displaced in the height direction of the base 2 when the movable iron piece 5 rotates from the second position to the first position. Fig. 9 schematically shows the state of the card 7 when the movable iron piece 5 is rotating from the second position to the first position. In Fig. 9, the card 7 when the movable iron piece 5 is in the second position is shown by a dashed line.

[0051] As shown in FIG. 9 , when the movable iron piece 5 rotates from the second position to the first position, the card body 71 can rotate in the height direction of the base 2 around the first sliding protrusion 75. When the movable iron piece 5 rotates from the second position to the first position, the card body 7 is pulled backward and downward by the second pressing portion 54 of the movable iron piece 5. At this time, the first sliding protrusion 75 allows the card body 71 to be displaced in the height direction of the base 2. That is, when the movable iron piece 5 rotates from the second position to the first position, the first sliding protrusion 75 allows the card 7 to tilt following the movable iron piece 5. The front side of the first sliding protrusion 75 is displaced upward from the position indicated by the dashed line. The rear side of the first sliding protrusion 75 is displaced downward from the position indicated by the dashed line.

[0052] The second sliding protrusion 76 has a symmetrical shape to the first sliding protrusion 75. The second sliding protrusion 76 is aligned with the first sliding protrusion 75 in the left-right direction. The second sliding protrusion 76 is slidably supported by the second guide rail 32. The second sliding protrusion 76 protrudes downward from the second extending portion 71b of the card body 71. The second sliding protrusion 76 has an arc shape. The second sliding protrusion 76 is in approximate linear contact with the second guide rail 32. The second sliding protrusion 76 is disposed between the pressing portion 72b and the pressed portion 74b.

[0053] The distance from the second sliding protrusion 76 to the pressing portion 72b is shorter than the distance from the second sliding protrusion 76 to the pressed portion 74b. That is, the second sliding protrusion 76 is disposed closer to the pressing portion 72b in the front-rear direction than the center between the pressing portion 72b and the pressed portion 74b. In this embodiment, there is one second sliding protrusion 76. That is, in this embodiment, the second extending portion 71b of the card body 71 is supported at one point with respect to the second guide rail 32 by the second sliding protrusion 76.

[0054] Similar to the first sliding protrusion 75, the second sliding protrusion 76 allows the card body 71 to be displaced in the height direction of the base 2 when the movable iron piece 5 rotates from the second position to the first position. In this respect, the second sliding protrusion 76 has the same configuration as the first sliding protrusion 75, and therefore a detailed description thereof will be omitted.

[0055] The supported portion 77 is formed on the connecting portion 71d of the card body 71. The supported portion 77 is arranged in the locking recess 52 of the movable iron piece 5. The supported portion 77 is supported by the supporting portion 52b of the movable iron piece 5. The supported portion 77 is arranged between the locking claw 52a and the supporting portion 52b, and is locked by the locking claw 52a. The supported portion 77 is movable in the vertical direction between the locking claw 52a and the supporting portion 52b. In other words, a gap is provided in the vertical direction between the supported portion 77 and the locking recess 52. This gap is provided to allow the movable iron piece 5 to rotate.

[0056] The supported portion 77 includes a pair of contact portions 77a, a recess 77b, and a recess 77c. The pair of contact portions 77a are spaced apart from each other in the left-right direction. The pair of contact portions 77a are formed at the lower end of the supported portion 77 and are in contact with the supporting portion 52b. The pair of contact portions 77a are spaced apart from each other in the up-down direction from the supporting portion 52b. The pair of contact portions 77a are positioned outward of the locking claws 52a when viewed from the rear. The card body 71 is supported by the first sliding protrusion 75, the second sliding protrusion 76, and the supported portion 77.

[0057] The recess 77b is formed at the upper end of the supported portion 77. The recess 77b has a shape that is recessed from top to bottom. The locking claw 52a of the movable iron piece 5 is disposed in the recess 77b and locks the recess 77b. As shown in FIGS. 5 and 6, in the open state, the recess 77b is separated from the locking claw 52a in the vertical direction. That is, a gap is provided between the recess 77b and the locking claw 52a in the vertical direction. This gap is provided to allow the movable iron piece 5 to rotate.

[0058] The recess 77c is located between a pair of contact portions 77a. The recess 77c has a shape that is recessed in the height direction of the base 2 from the support portion 52b of the movable iron piece 5. The recess 77c has a shape that is recessed upward at the lower end of the supported portion 77. The recess 77c is located in the center of the supported portion 77 in the left-right direction. The recess 77c is located below the recess 77b and the locking claws 52a of the movable iron piece 5. The recess 77c is located above the support portion 52b of the movable iron piece 5. The recess 77c is separated from the support portion 52b of the movable iron piece 5 in the up-down direction.

[0059] The plurality of guide portions 78 are provided on the first extending portion 71a and the second extending portion 71b of the card body 71. The plurality of guide portions 78 protrude toward the upper sidewall of the storage portion 23. The plurality of guide portions 78 suppress misalignment of the card body 71 in the left-right direction. In this embodiment, two of the plurality of guide portions 78 are provided on each of the first extending portion 71a and the second extending portion 71b.

[0060] Next, we will explain the operation of the electromagnetic relay 1. When the coil 41 is not excited, the card 7 is pressed by the movable iron piece 5 in a direction away from the movable contact piece 10 by the biasing force of the hinge spring 6, and the card 7 is in a state where it is separated from the movable contact piece 10. At this time, the movable iron piece 5 is in the first position, and the second fixed contact 9a is in contact with the second movable contact piece 10b.

[0061] When a voltage is applied to the coil 41 and the coil 41 is excited, the movable iron piece 5 is attracted to the iron core 43, and the movable iron piece 5 rotates from the first position to the second position. As the movable iron piece 5 rotates, the card 7 is pressed against the movable iron piece 5, the first sliding protrusion 75 slides against the first guide rail 31, and the second sliding protrusion 76 slides against the second guide rail 32, and the card 7 moves forward. As a result, the movable contact piece 10 is pressed forward by the pressing portions 72a and 72b of the card 7, the second movable contact 10b separates from the second fixed contact 9a, and the first movable contact 10a contacts the first fixed contact 8a. When the application of voltage to the coil 41 is stopped, the elastic force of the movable contact piece 10 and the hinge spring 6 rotates the movable iron piece 5 from the second position to the first position. As a result, the card 7 is pressed backward and downward by the second pressing portion 54 of the movable iron piece 5, the first sliding protrusion 75 slides relative to the first guide rail 31, and the second sliding protrusion 76 slides relative to the second guide rail 32, causing the card 7 to move backward. As a result, the first movable contact 10a separates from the first fixed contact 8a, and the second movable contact 10b comes into contact with the second fixed contact 9a.

[0062] In the above-described electromagnetic relay 1, when the movable iron 5 rotates from the second position to the first position, the first sliding protrusion 75 and the second sliding protrusion 76 allow for positional deviation of the card body 71 in the height direction of the base 2. This allows the card 7 to tilt following the movable iron 5 when the movable iron 5 rotates from the second position to the first position, thereby reducing the gap between the card 7 and the movable iron 5 that allows for rotation of the movable iron 5. In this embodiment, the gap between the supported portion 77 and the locking recess 52 can be reduced. This prevents interference with the rotation of the movable iron 5 and reduces rattling of the card 7. As a result, the operation of the card 7 is stabilized, and the behavior of the electromagnetic relay 1 is also stabilized.

[0063] The supported portion 77 of the card 7 includes a pair of contact portions 77a that are in contact with and supported by the supporting portion 52b of the movable iron piece 5. This allows the supporting portion 52b of the movable iron piece 5 to stably support the card 7.

[0064] Furthermore, the supported portion 77 of the card 7 includes a recess 77c disposed between the pair of contact portions 77a. Therefore, for example, when the protrusion 55 of the movable iron piece 5 is formed by hammering, if a part of the supporting portion 52b of the movable iron piece 5 bulges toward the supported portion 77 of the card 7, the recess 77c can prevent the bulging part of the supporting portion 52b from coming into contact with the supported portion 77. This allows the supporting portion 52b of the movable iron piece 5 to stably support the card 7 via the pair of contact portions 77a.

[0065] The above describes an embodiment of an electromagnetic relay according to one aspect of the present invention, but the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the gist of the invention.

[0066] The configurations of the contact device 3 and the electromagnet device 4 may be changed. For example, the second fixed terminal 9 and the second movable contact 10b may be omitted. The shapes of the cutout holes 10c and 10d may be changed. The shape of the card 7 may be changed.

[0067] The first sliding protrusion 75 and the second sliding protrusion 76 may be disposed at positions that allow for displacement of the card body 71 in the height direction of the base 2 when the movable iron piece 5 rotates from the second position to the first position. The first sliding protrusion 75 and the first guide rail 31 may be disposed at the center in the left-right direction. In that case, the second sliding protrusion 76 and the second guide rail 32 may be omitted. There may be multiple first sliding protrusions 75. There may also be multiple second sliding protrusions 76.

[0068] The protrusion 55 of the movable iron piece 5 may be omitted. The pair of contact portions 77a and recesses 77c of the card 7 may be omitted. For example, the supported portion 77 of the card 7 may be supported such that the lower end of the central portion of the supported portion 77 in the left-right direction comes into contact with the supporting portion 52b of the movable iron piece 5 and is supported. [Explanation of symbols]

[0069] 1 Electromagnetic relay 2. Bass 4 Electromagnetic device 5 moving iron 7 Cards 8 First fixed terminal (an example of a fixed terminal) 8a First fixed contact (an example of a fixed contact) 10 Movable contact piece 10a First moving contact (an example of a moving contact) 31 First guide rail 32 Second guide rail 43 Iron Core 52b Support part 55 Convex part 71 Card body 72a Pressing part 74a Pressed part 75 First sliding protrusion 76 Second sliding protrusion 77 Supported part 77a Pair of contacts 77c recess

Claims

1. With the base, a fixed terminal including a fixed contact and supported by the base; a movable contact piece that includes a movable contact that is arranged opposite the fixed contact and is supported by the base; an electromagnet device disposed on the base; a movable iron piece that is rotatable between a first position and a second position and that is rotated from the first position toward the second position by being attracted by the electromagnet device; a card that is movable in a moving direction including a first direction from the movable contact toward the fixed contact and a second direction opposite to the first direction, is connected to the movable iron piece, and presses the movable contact piece by rotating the movable iron piece from the first position to the second position; a first guide rail extending in the movement direction and guiding movement of the card in the first direction and the second direction; Equipped with the card includes a card body disposed apart from the first guide rail in a height direction of the base intersecting with the moving direction, a first sliding protrusion protruding from the card body and slidably supported on the first guide rail, a pressing portion capable of pressing the movable contact piece, and a pressed portion pressed in the first direction by the movable iron piece as the movable iron piece rotates from the first position to the second position, the first sliding protrusion is disposed between the pressing portion and the pressed portion, and allows the position of the card body to be shifted in a height direction of the base when the movable iron piece rotates from the second position to the first position; a distance from the first sliding protrusion to the pressing portion is shorter than a distance from the first sliding protrusion to the pressed portion; Electromagnetic relay.

2. A base, a fixed terminal including a fixed contact and supported by the base; a movable contact piece that includes a movable contact that is arranged opposite the fixed contact and is supported by the base; an electromagnet device disposed on the base; a movable iron piece that is rotatable between a first position and a second position and that is rotated from the first position toward the second position by being attracted by the electromagnet device; a card that is movable in a moving direction including a first direction from the movable contact toward the fixed contact and a second direction opposite to the first direction, is connected to the movable iron piece, and presses the movable contact piece by rotating the movable iron piece from the first position to the second position; a first guide rail extending in the movement direction and guiding movement of the card in the first direction and the second direction; Equipped with the card includes a card body disposed apart from the first guide rail in a height direction of the base intersecting the moving direction, and a first sliding protrusion protruding from the card body and slidably supported by the first guide rail; the first sliding protrusion allows a positional deviation of the card body in a height direction of the base when the movable iron piece rotates from the second position to the first position; the electromagnetic device includes an iron core; the movable iron piece includes a support portion that contacts and supports the card, and a protrusion that can come into contact with the iron core of the electromagnetic device, the card further includes a supported portion supported by the supporting portion of the movable iron piece, the supported portion of the card includes a pair of contact portions that contact the supporting portion of the movable iron piece, and a recess that is disposed between the pair of contact portions and recessed in a height direction of the base from the supporting portion of the movable iron piece, Electromagnetic relay.

3. a second guide rail disposed apart from the first guide rail in a direction intersecting the moving direction and the height direction of the base; the card further includes a second sliding protrusion protruding from the card body and slidably supported by the second guide rail; the second sliding protrusion allows the position of the card body to be shifted in the height direction of the base when the movable iron piece rotates from the second position to the first position; 3. An electromagnetic relay according to claim 1 or 2.

4. the number of the first sliding projections is one, the number of the second sliding projections is one; 4. The electromagnetic relay according to claim 3.

5. the movable iron piece includes a support portion that contacts and supports the card; 2. The electromagnetic relay according to claim 1.

6. the card further includes a supported portion supported by the supporting portion of the movable iron piece, the supported portion of the card includes a pair of contact portions that come into contact with the supporting portion of the movable iron piece; 6. An electromagnetic relay according to claim 5.

7. the electromagnetic device includes an iron core; the movable iron piece further includes a protrusion that can come into contact with the iron core of the electromagnetic device, the supported portion of the card further includes a recess that is disposed between the pair of contact portions and recessed in a height direction of the base from the supporting portion of the movable iron piece.

7. An electromagnetic relay according to claim 6.

8. The card is disposed at a distance from the movable contact piece in the height direction of the base.

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

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