JP4586849B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an improvement in an electromagnetic relay in which a movable spring is reciprocated by a reversal operation of an armature to perform a contact / separation switching operation between a fixed contact and a movable contact.

  Conventionally, as this type of electromagnetic relay, for example, there is one disclosed in Patent Document 1. In this device, the armature reciprocates and rotates in accordance with the change in the excitation state of the electromagnet, and by this operation, the movable spring connected to the card is reciprocated, thereby contacting the fixed contact and the movable contact. This is a separate switching operation.

  In a conventional electromagnetic relay of this type, particularly an electromagnetic relay rated at a large capacity of about 60 amperes, an arc current flows to the movable spring due to the generation of an arc due to the contact and separation between the contacts and the movable spring. The product generates heat and repeats such heat generation, which causes deterioration of the product.

Conventionally, in order to suppress such a temperature rise of the contact portion, the temperature increase is caused by superposing the shunt plate on the movable spring and flowing a current having a reduced current value through each of the movable spring and the shunt plate. Some products have been developed to control the situation.
2001-143594 gazette

  FIGS. 9A and 9B are schematic operation explanatory views of a movable spring obtained by superposing conventional flow dividing plates. FIG. 9A shows a contact in an open state, and FIG. 9B shows a contact in a closed state.

  In the figure, 141 is a movable spring fixed to a terminal plate (not shown) on the movable side, 142 is a movable contact crimped to the movable spring 141, 132 is a fixed contact, 131 is a fixed with a fixed contact 132 attached thereto. A terminal plate on the side, 144 is a shunt plate in which the movable contact 142 and the movable contact 142 are caulked to the back side of the movable spring, and 160 is a card in which the tip of the movable spring 141 is connected. Here, the movable terminal plate is a terminal plate joined to the movable spring 141 provided with the movable contact 142 among the terminal plates connected to the energizing path, and the fixed terminal plate 131 is connected to the energizing path. It is the terminal board which provided the fixed contact 132 among the terminal boards connected.

  As shown in this figure, the card 160 slides based on the reversal operation of the armature (not shown) according to the change of the excitation state of the electromagnet (not shown), so that the movable spring 141 connected to the card 160 is moved. However, in the closed state where the contacts are in contact with each other, as shown in FIG. 9B, the tip of the flow dividing plate 144 superposed on the movable spring 141 may open due to the elastic deformation of the movable spring 141. . If such reciprocating motion is repeated, the movable spring 141 may slightly plastically deform and remain open.

  The gap S between the tip of the flow dividing plate 144 and the movable spring 141 has almost no adverse effect on the contact / separation operation of the contact, but an arc is generated at the moment when the contact is released, and the arc current is generated by the movable spring 141. , The current may not be sufficiently diverted to the shunt plate 144 due to the gap, and the temperature rise may not be suppressed. Further, since the gap is formed, heat is not transmitted to the flow dividing plate 144, and the heat dissipation effect by the flow dividing plate 144 may be reduced.

  The present invention has been proposed in view of such circumstances, and an object of the present invention is to provide an electromagnetic relay that can suppress an increase in temperature, has a high heat dissipation effect, and can withstand long-term use.

  In order to achieve the above object, an electromagnetic relay according to claim 1 includes an armature that performs a predetermined reversal operation in response to a change in the excitation state of an electromagnet, and a movable contact that performs a contact operation with respect to a fixed contact. A movable spring that overlaps the flow-dividing plate that splits the current that flows through the movable contact and one end is connected to the armature and the other end is connected to the movable spring, and the movable spring is switched according to the reversing operation of the armature. In an electromagnetic relay including a card that is moved to move the movable contact toward and away from the fixed contact, the shunt plate is extended to the other end of the card and connected to the card together with the movable spring.

  An electromagnetic relay according to a second aspect is the electromagnetic relay according to the first aspect, wherein the movable spring is joined to the movable side terminal plate, and the movable side terminal plate is in the middle of the contacting / separating operation with respect to the fixed contact of the movable contact. It has a sensitivity adjustment support piece that supports the movable spring in an elastically deformed state, and the sensitivity adjustment support piece has a support piece for supporting the movable spring at the tip of the arm that extends to the vicinity of the movable contact. The structure has.

  According to a third aspect of the present invention, in the electromagnetic relay according to the second aspect, the movable spring further includes a sensitivity adjustment piece, and the portion is brought into contact with the sensitivity adjustment support piece to be supported.

  According to a fourth aspect of the present invention, in the electromagnetic relay according to the second or third aspect, the sensitivity adjustment support piece is configured to support the movable spring so as to sandwich a part of the flow dividing plate.

  The electromagnetic relay according to claim 5 further includes a reinforcing plate according to any one of claims 1 to 4, and the reinforcing plate and the movable spring are caulked and joined by a movable contact so as to sandwich the flow dividing plate. Has been.

  An electromagnetic relay according to a sixth aspect is the electromagnetic relay according to any one of the first to fifth aspects, wherein the fixed contact includes a fixed spring joined to the fixed-side terminal plate, and a fixed-side reinforcing plate superposed on the fixed spring. It is fixed by caulking joint.

  According to the electromagnetic relay of the first aspect, since the movable spring and the diverter plate are coupled to the card in a superposed state, the movable spring is also in the middle of switching reciprocating movement. Even in the stopped state, the movable spring and the flow dividing plate are kept in close contact. Therefore, since the gap is not formed by keeping the movable spring and the shunt plate in close contact with each other, the current is not generated at the opening and closing of the contact, particularly at the moment when the movable contact is separated from the fixed contact and the arc current is generated. The movable spring and the flow-dividing plate are smoothly divided and flowed. Therefore, the effect of suppressing the temperature rise by the flow-dividing plate is not reduced, and as a result, the electromagnetic relay can be extended. Further, even if the vicinity of the caulking portion of the movable contact of the movable spring generates heat due to the arc current, heat can be released to the shunt plate that is in close contact with the movable spring without any gap and can be sufficiently dissipated.

  According to the electromagnetic relay according to claim 2, since the movable terminal plate has a sensitivity adjustment support piece for supporting the movable spring at the tip of the arm portion extending to the vicinity of the movable contact, When the sensitivity adjustment support piece comes into contact with the movable spring in the state where the contact is kept open, a current is also diverted to the terminal board, and heat can also be released.

  According to the electromagnetic relay of the third aspect, since the movable spring is provided with the sensitivity adjustment piece that is in contact with and supported by the sensitivity adjustment support piece, the balance between the sensitivity adjustment and the heat radiation effect can be finely adjusted.

  According to the electromagnetic relay of claim 4, when the contact is separated and the sensitivity adjustment support piece supports the movable spring, the heat from the vicinity of the contact is sensitized by sandwiching the flow dividing plate between the movable spring and the contact. It is possible to dissipate heat by transmitting it to the adjustment support piece. Further, in the state where the contact is kept open, the state where the sensitivity adjustment support piece presses the flow dividing plate and is sandwiched between the movable spring and the movable spring is maintained, so that the flow dividing plate can be kept in close contact with the movable spring.

  According to the electromagnetic relay according to claim 5, since the reinforcing plate further includes a reinforcing plate that sandwiches the flow dividing plate with the movable spring, and the reinforcing plate is joined to the movable contact together with the movable spring and the dividing plate, In addition to strengthening the close contact state of the plate with the movable spring, the contact area with the caulking portion increases, so that the heat dissipation effect can be further improved.

  According to the electromagnetic relay of claim 6, the fixed spring joined to the fixed terminal plate and the fixed reinforcing plate superposed on the fixed spring are brought into close contact by caulking joining of the fixed contacts. In addition to being able to reinforce the crimped joint of the fixed contact to the fixed spring, the contact area with the crimped portion is increased, so that the heat dissipation effect can be improved. Since the fixed contact is fixed to the fixed spring, the fixed spring is elastically deformed when in contact with the movable contact, and the contact point moves after contact. The force to peel off the weld increases. As a result, the electrical life of the electromagnetic relay can be extended.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 is a perspective view of an electromagnetic relay according to a first embodiment of the present invention, FIG. 2 is a perspective view of a movable contact spring block used in the electromagnetic relay, and FIG. 3 is the electromagnetic relay in a state where the contacts are separated. FIG. 4 is a front view of the electromagnetic relay showing a state where the contacts are in contact with each other.

  The electromagnetic relay shown in FIG. 1 is a so-called latch-type relay, and is roughly classified as an internal structure, and is divided into an electromagnet block A, an armature block B, a fixed contact block C, a movable contact spring block D, and an armature block B. And a card 60 that connects the movable contact spring block D, a body 50 that houses each of these blocks and components, and a cover (not shown) that covers the internal structure. In addition, the code | symbol which shows these blocks is shown only in FIG. 1 in 1st Embodiment.

  In the following description regarding FIGS. 1 to 4, up, down, left, and right indicating directions are based on the diagrams shown in FIGS. 3 and 4.

  The electromagnet block A is formed of a magnetic metal material in a substantially U shape, and has a yoke 11 having bent end portions 11a and 11a that become magnetic pole portions by excitation of a coil, a resin coil bobbin 12, and the coil bobbin. 12, a coil portion 13 formed by winding a conducting wire around a central portion 11 b (shown by a broken line in FIGS. 3 and 4) between both end portions 11 a of the yoke 11, and a coil portion fixed integrally with the coil bobbin 12. 13 includes a pair of coil terminals 14 to which both ends are connected (for example, soldered).

  The armature block B includes an armature 21, a permanent magnet 22, an auxiliary yoke 23, and a hinge spring 24.

  The permanent magnet 22 is formed in a plate shape (a rectangular parallelepiped in the illustrated example) whose length in the vertical direction is shorter than the length between both ends 11a, 11a of the yoke 11, and the right surface side is from both ends 11a, 11a of the yoke 11. Is also arranged to protrude slightly to the right. Further, the permanent magnet 22 is disposed before and after the assembly of the electromagnetic relay, for example, so that the right side is an S pole and the left side is an N pole.

  The armature 21 is disposed on the right side of the permanent magnet 22, and is formed in a plate shape whose length in the vertical direction is longer than the length between both ends 11 a and 11 a of the yoke 11, and protrudes from the upper end. A pair of protrusions 21a for connecting to the card 60, a fulcrum protrusion (not shown) protruding from the center of the left surface, and a hinge spring 24, and protruding from the upper and lower sides of the right surface. Shaft portions 21b and 21b (shown in FIGS. 3 and 4).

  The auxiliary yoke 23 is arranged on the left side of the permanent magnet 22 and is formed in a plate shape whose length in the vertical direction is substantially the same as the length between both ends 11a, 11a of the yoke 11 or slightly shorter than that. In addition, a bent arm piece 23a extending from the center position in the vertical direction of the end portion (upper side in FIG. 1) to the permanent magnet 22 side is provided. A small protrusion 23b for engaging with the hinge spring 24 protrudes from the bent arm piece 23a.

  The hinge spring 24 integrally fixes the permanent magnet 22, the armature 21 and the auxiliary yoke 23, is formed of a thin metal plate having elasticity, and is formed on the bent arm piece 23 a of the auxiliary yoke 23. A main body piece 24a having a locking hole 24b that engages with the small projection 23b, and a fold that is bent to the right side of the armature 21 from the main body piece 24a and fixed to the pair of shaft portions 21b of the armature 21. And a curved piece 24c.

  The hinge spring 24 has a main body piece 24a fixed thereto, and is fixed to the pair of shaft portions 21b by the bent piece 24c so that the elastic return force of the bent piece 24c always holds the armature 21 vertically. To do.

  The fixed contact block C is fixed to a fixed terminal plate 31 (hereinafter referred to as a fixed terminal plate) formed by bending a conductive metal plate, and is fixed to the upper portion of the fixed terminal plate 31 by caulking and facing leftward. And a fixed contact 32 made of conductive metal. In addition, as shown in FIG. 1, the fixed terminal board 31 has the opening hole 31a in part, and has elasticity.

  The movable contact spring block D has a conductive terminal plate 43 formed by bending a conductive metal plate (hereinafter referred to as a movable terminal plate), and a conductive member that is caulked and joined by a rivet at the upper end of the movable terminal plate 43. A metal movable spring 41, a metal movable contact 42 (see FIGS. 3 and 4) attached by caulking to the position of the movable spring 41 facing the fixed contact 32, and the movable spring 41 A conductive metal shunt plate 44 is joined to the movable contact 42 and closely polymerized to the left side of the movable spring 41, and the lower end is joined to the movable terminal plate 43 together with the movable spring 41.

  As shown in FIG. 2, the flow dividing plate 44 is connected to the overlapping portion 44 b that is caulked and joined to the movable contact 42 and superposed with the movable spring 41, and the fixed portion 44 d that is joined and fixed to the movable terminal plate 43. In addition, the movable spring 41 and the bending portion 44c formed in a separated state are provided.

  The movable terminal plate 43 includes an arm portion 43b that extends upward while being curved from the fixed portion 44d to which the movable spring 41 is fixed to the vicinity of the movable contact 42. The movable contact 42 is connected to the distal end of the movable contact plate 42 from the fixed contact 32. A sensitivity adjustment support piece 43a that contacts the movable spring 41 that moves while being elastically deformed when it is separated and supports the movable spring 41 from the left is formed.

  A sensitivity adjustment small piece 41b is formed on the movable spring 41 so as to face the sensitivity adjustment support piece 43a (see FIG. 2) with the slit excision 41c interposed therebetween. The sensitivity adjustment support piece 43a and the sensitivity adjustment small piece 41b constitute a sensitivity adjustment means 47 for adjusting the contact contact / separation sensitivity.

  Furthermore, the upper end of the movable spring 41 is connected to the card 60 so that the movable spring 41 can be switched back and forth via an insulating card 60 that slides in response to the reversing operation of the armature 21. The insertion piece 41a is protrudingly provided.

  Further, an insertion piece 44 a that extends in close contact with the movable spring 41 is also formed at the upper end of the flow dividing plate 44. As will be described later, the connecting structure of the flow dividing plate 44 to the card 60 is for maintaining a close contact state with the movable spring 41 in the switching reciprocating movement of the movable spring 41 for contact contact / separation operation. The connection means is not limited to the connection means by inserting the insertion piece 44a into the insertion hole 62 as in this example, and is a connection means capable of locking the end of the flow dividing plate 44 extending to the position of the card 60. Also good.

  In this example, the insertion piece 44a of the flow dividing plate 44 is made narrower than the insertion piece 41a of the movable spring 41 as shown in FIG. 2, thereby reducing the influence on the elastic modulus of the movable spring 41. However, it is not limited to such a thing.

  The card 60 is formed in a plate shape with resin or the like, and is divided into an insertion hole 61 opened on the left end side for fitting the insertion piece 21a of the armature 21, and the insertion piece 41a of the movable spring 41. It has an insertion hole 62 formed on the right end side for inserting the insertion piece 44a of the plate 44 in an overlapped state, and a slide guide hole 63 extending in the left-right direction. The insertion of the movable spring 41 and the flow dividing plate 44 into the insertion hole 61 may be loose fitting. In the case of loose fitting, as shown in FIGS. It is desirable to have a structure that projects upward from the insertion hole 62 of the card 60 so that it does not come off.

  The body 50 is formed of a resin in a box, and stores and fixes the electromagnet block A, the armature block B, the card 60, the fixed contact block C, and the movable contact spring block D, and inside each block, each member A plurality of barriers 51 for partitioning and a plurality of grooves (not shown) for fitting and fixing each member are formed. An insertion protrusion 52 is formed at the upper end of the barrier 51 that partitions the movable contact spring block D and the armature block B of the barrier 51, and the insertion protrusion 52 is inserted into the slide guide hole 63 of the card 60. By doing so, the left / right sliding movement of the card 60 is guided.

  Next, the operation of the electromagnetic relay will be described.

  When the coil is excited by passing a current in such a direction that the lower end portion 11a of the yoke 11 becomes the south pole, the lower end portion 21d of the armature 21 forms a magnetic pole portion so that a closed magnetic circuit is formed. 3, the armature 21 rotates clockwise in FIG. 3 with the fulcrum protrusion of the armature 21 as a rotation fulcrum. As a result, the card 60 in which the insertion piece 21a at the upper end of the armature 21 is connected to one end side slides toward the movable spring 41, and the movable spring 41 connected to the other end of the card 60 is Moving toward the fixed terminal plate 31, the movable contact 42 of the movable spring 41 contacts the fixed contact 32 of the fixed terminal plate 31, and the state shown in FIG. 4 is obtained.

  When the excitation of the coil is stopped, both end portions 11a of the yoke 11 do not form a magnetic pole portion, so that there is no magnetic attraction force on the armature 21 of the lower end portion 11a, but the armature is acted on by the action of the hinge spring 24 and the permanent magnet 22. The state shown in FIG. 4 is maintained in which the lower end 21 d of 21 is in contact with the lower end 11 a of the yoke 11.

  In this state, when an electric current is passed in a direction opposite to the above-described direction and the coil is excited, the upper end portion 21c of the armature 21 forms the closed magnetic circuit so that the upper end portion 11a of the yoke 11 becomes the S pole. 4, the armature 21 rotates counterclockwise in FIG. 4 with the fulcrum protrusion of the armature 21 as a rotation fulcrum. As a result, the card 60 connected to the insertion piece 21 a of the armature 21 slides away from the movable spring 41, and the movable spring 41 connected to the other end of the card 60 moves from the fixed terminal plate 31. By moving away from each other, the movable contact 42 of the movable spring 41 is separated from the fixed contact 32 of the fixed terminal plate 31, and the state shown in FIG.

  When the excitation of the coil is stopped, both end portions 11a of the yoke 11 do not form a magnetic pole portion, so that there is no magnetic attractive force to the armature 21 of the upper end portion 11a, but the upper end of the armature 21 is caused by the action of the permanent magnet 22. The state of FIG. 3 in which the portion 21c is in contact with the upper end portion 11a of the yoke 11 is maintained.

  In such contact opening operation, as shown in FIGS. 3 and 4, the movable spring 41 moves while being elastically deformed, and even when the coil current is stopped, the magnetic attractive force of the permanent magnet 22 causes the elasticity of the movable spring 41. The movable spring 41 is held in an energized state overcoming the combined force of the return force and the elastic return force of the bent piece 24c of the hinge spring 24, while it is movable when the direction is reversed and current is passed. Since the elastic restoring force of the spring 41 and the hinge spring 24 acts so as to reduce the burden of the reversing operation of the armature 21, the reversing operation is performed smoothly.

  Thereafter, in the operation process in which the movable spring 41 contacts the fixed contact 32 through the neutral state, an elastic return force of the movable spring 41 acting against the sliding movement of the card 60 acts, and the fixed terminal plate is slightly elastic. Due to the deformation, smooth contact can be achieved.

  In this way, by adjusting the magnetic attraction action of the electromagnet, the armature attracting and holding action of the hinge spring 24 and the permanent magnet 22 and the elastic action of the movable spring 41 so as to cooperate with each other, 2 of the armature 21 is obtained. The reversal rotation between the poles and the rotation stop holding are reliably performed.

  The electromagnetic relay also includes sensitivity adjustment means 47 including a sensitivity adjustment support piece 43 a extended from the movable terminal plate 43 and a sensitivity adjustment small piece 41 b formed by processing a part of the movable spring 41. Thus, the operation sensitivity for shifting from the separated state to the contact state can be easily adjusted.

  That is, the sensitivity adjustment support piece 43a formed of a part of the movable terminal plate 43 is adjusted so as to be separated from the movable spring 41 when the movable contact 42 is in contact with the fixed contact 32. When the movable contact 42 is separated from the fixed contact 32 and the movable spring 41 is elastically restored once and further elastically deformed and bent, the movable spring 41 comes into contact with the elastically deformed sensitivity adjusting piece 41b together with the movable spring 41. Is supported from the left, and the operation of the movable spring 41 is stopped. That is, by making one or both of the sensitivity adjustment support piece 43a and the sensitivity adjustment piece 41b plastically deformed in advance and adjusting the distance between the two, the contact stroke distance can be adjusted. Sensitivity is adjusted.

  Further, since the sensitivity adjustment small piece 41b is a thin plate and can be easily plastically deformed and used for fine adjustment of the sensitivity, such a small piece may not be provided, and the adjustment may be made only by the sensitivity adjustment support piece 43a.

  In the contact / separation operation of the contact as described above, the movable spring 41 and the flow dividing plate 44 are superposed in the vicinity of the caulking portion 45 of the movable contact 42 due to the caulking joint, and both the insertion pieces 41a at the upper end portion. 44a is inserted into an insertion hole 62 provided in the card 60 in a superposed state and is connected to the card 60, so that the movable spring is in the middle of switching reciprocating movement above the curved portion 44c of the flow dividing plate 44. Even when the movable spring is stopped, the movable spring 41 and the flow dividing plate 44 can be kept in close contact with each other.

  Accordingly, the movable spring 41 and the flow dividing plate 44 are kept in close contact with each other, so that no gap is formed, and no resistance is added to prevent current flow. Therefore, at the moment when the contact is opened and closed, especially when the movable contact 42 is separated from the fixed contact 32 and an arc current is generated, the current flows smoothly and separately between the movable spring 41 and the flow dividing plate 44, and therefore, the temperature rise is suppressed. As a result, the electromagnetic relay can be prolonged. Further, even if the vicinity of the caulking portion 45 of the movable contact 42 of the movable spring 41 generates heat due to the arc current, the heat can be released to the flow dividing plate 44 that is in close contact with the movable spring 41 without any gap, and can be sufficiently dissipated. .

  Further, the flow dividing plate 44 has a large heat radiation area by the curved portion 44c to enhance the cooling effect. It is to be noted that a heat dissipation effect can be expected even if the curved portion 44c is not provided and the entire portion is closely attached to the movable spring 41, but the elastic force (elasticity) when the movable spring 41 and the flow dividing plate 44 are integrated. Rate) and the heat dissipation effect due to the close addition of the flow dividing plate 44, it is desirable to provide such a curved portion 44c for adjustment.

  Further, the movable spring 41 and the flow dividing plate 44 may be fixed and bonded as a whole above the caulking portion 45 in consideration of adhesion, but it is easy to adjust the balance between the elastic force and the heat dissipation effect. For this reason, it is desirable to separate the connection portion with the card 60. Therefore, it is desirable to provide a slight clearance in the insertion hole 62 even when the card 60 is connected to the insertion hole 62. Moreover, it becomes easy to attach and remove by providing a clearance.

  FIG. 5 is a schematic partial front view of the card 60 for explaining in detail the insertion hole 62 for inserting the movable spring 41 and the flow dividing plate 44.

  As shown in FIG. 5, the card 60 is formed with insertion holes 62 for inserting the insertion pieces 41 a and 44 a of the movable spring 41 and the flow dividing plate 44. In this insertion hole 62, a spring opening 62a and a flow dividing plate opening 62b corresponding to the width dimension of each of the insertion pieces 41a, 44a are continuously formed. A certain amount of clearance G is formed.

  In the electromagnetic relay of this example, when the contact is closed, the position (stroke) at which the movable contact 42 contacts and operates with the fixed contact 32 is determined, and the moving amount of the card 60 is adjusted to be larger than that. When 42 further tries to move from the stroke position, the fixed terminal plate 31 is moved by a slight elastic deformation, and the movable spring stops at the overtravel position further moved from the stroke position. The movable spring 41 is further elastically deformed while moving from the stroke position to the overtravel position, and as shown in FIG. 5, the clearance amount G is set to the upper limit with the insertion piece 44a of the flow dividing plate 44. A slight opening (gap) S is formed.

  However, since the clearance S is limited to the clearance amount G of the insertion hole 62, the clearance amount G is designed to be smaller than the overtravel amount. The movable spring 41 and the flow dividing plate 44 can be brought back into close contact with each other, and as a result, an assumed amount of current can be reliably passed through the flow dividing plate 44.

  Note that when the contact is opened, the elastic return of the movable spring 41 in the return direction Y is regulated by the shoulders 62a of the insertion hole 62. 60 is also configured to slide in the return direction Y by the reversing operation of the armature 21 (see FIG. 1). If the two return forces are adjusted in advance and designed, the return of the movable spring 41 is different. The movable spring 41 and the flow dividing plate 44 can be brought into close contact with each other without being restricted by the shoulders 62c of the insertion hole 62.

  Moreover, since the insertion piece 41a of the movable spring 41 is formed wider than the insertion piece 44a of the flow dividing plate 44, when the contact points contact each other, the movable spring 41 is supported by both shoulder portions 62a and has a width. Although both ends are lifted slightly in the direction, the central part is in a sinked state, so that a gap formed between it and the flow dividing plate 44 can be reduced.

  Next, a second embodiment of the present invention will be described.

  FIG. 6 is a partial front view of a movable contact spring block used in the electromagnetic relay according to the second embodiment.

  The movable contact spring block D used in this example is different from that of the first embodiment in the shape of the sensitivity adjustment support piece 43a formed by extending the movable terminal plate 43, and the lower end of the sensitivity adjustment support piece 43a is The structure is such that the diverter plate 44 is sandwiched between the caulking portion 45 and the movable spring 41. In addition, about the structure same as 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  According to such a structure, in a state where the contact is separated and the sensitivity adjustment support piece 43a supports the movable spring 41, the heat from the vicinity of the crimping portion 45 is generated by pressing the flow dividing plate 44, thereby the sensitivity adjustment support piece 43a. It is possible to dissipate heat. Further, in the state where the contact is kept open, the state where the sensitivity adjustment support piece 43a presses the flow dividing plate 44 and is sandwiched between the movable spring 41 is maintained, so that the flow dividing plate 44 is in close contact with the movable spring 41. Can hold.

  In this structure, when the sensitivity adjustment small piece 41b is plastically deformed toward the fixed contact 32, the sensitivity adjustment support piece 43a comes into contact with the flow dividing plate 44, so the sensitivity adjustment small piece 41b is the sensitivity adjustment support piece 43a. On the contrary, if the sensitivity adjustment small piece 41b is plastically deformed in the direction away from the fixed contact 32, the sensitivity adjustment support piece 43a may not contact the flow dividing plate 44. 41 may have a structure in which the sensitivity adjustment piece 41b is not formed.

  Furthermore, a third embodiment of the present invention will be described.

  FIG. 7 is a perspective view of a movable contact spring block used in the electromagnetic relay according to the third embodiment.

  In the movable contact spring block D used in this example, a metal reinforcing plate 46 that is caulked and joined by the movable contact 42 together with the movable spring 41 and the flow dividing plate 44 is further added to the structure of the electromagnetic relay of the first embodiment. It has a structure. As shown in FIG. 7, the reinforcing plate 46 is superposed and joined around a caulking portion 45 of the flow dividing plate 44. In addition, about the structure same as 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  According to such a structure, the reinforcing plate 46 is further overlapped and joined to improve the caulking strength, and the caulking portion 45 is joined to the reinforcing plate 46 to increase the contact area of the caulking portion 45. The heat dissipation effect is further increased and the life of the electromagnetic relay is extended.

  In the present embodiment, a sensitivity adjustment support piece 43a as shown in the second embodiment may be provided. That is, the sensitivity adjustment support piece 43 a has a structure in which the lower end thereof is closer to the crimping portion 45 and the reinforcing plate 46 and the flow dividing plate 44 are sandwiched between the movable spring 41.

  Furthermore, a fourth embodiment of the present invention will be described. This embodiment is different from the first to third embodiments in the configuration of the fixed contact block C.

  FIG. 8 is a perspective view of a fixed contact block C used in the electromagnetic relay according to the fourth embodiment of the present invention.

  The fixed contact block C used in this example is different from the first to third embodiments in that the fixed contact 32 is crimped and joined to a fixed spring 33 that is joined to the fixed terminal plate 31. That is, the fixed contact block C, like the movable contact spring block D, constitutes a fixed contact spring block.

  The fixed contact spring block C includes a fixed terminal plate 31 formed by bending a conductive metal plate, a conductive metal fixed spring 33 that is crimped and joined by a rivet at one end of the fixed terminal plate 31, A metal fixed contact 32 attached by caulking and bonding to a position of the spring 33 facing the movable contact 42 (see FIG. 3 as an example of the first embodiment), and the fixed spring 32 together with the fixed spring 33 It is constituted by a fixed side reinforcing plate 34 made of conductive metal that is caulked and joined closely to the back side (the side opposite to the contact) of the fixed spring 33. In addition, about the structure same as 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted. The fixed contact spring block C can be applied to any of the first to third embodiments.

  Further, the fixed contact spring block C uses the fixed spring 33 so that when the movable contact 42 contacts the fixed contact 42, the fixed spring 33 is elastically deformed and bent. In order to cause elastic deformation, the fixed-side reinforcing plate 34 is not connected to the fixed terminal plate 31, and is superposed and fixed only to the vicinity of the contact centered on the caulking portion 35 of the fixed spring 33.

  According to such a configuration, the fixing spring 33 bonded to the fixed terminal plate 31 and the fixed-side reinforcing plate 34 superposed on the fixing spring 33 are brought into close contact by caulking bonding of the fixed contact 32. The caulking joint of the stationary contact 32 to the stationary spring 33 can be reinforced, and the contact area with the caulking portion 35 is increased, so that the heat dissipation effect can be improved. If the fixed contact 32 is bonded only to the fixed spring 33, the fixed spring 33 is thin, so that the caulking bonding strength and the heat dissipation effect are inferior compared with the fixed contact block used in the first to third embodiments. By adding the reinforcing plate 34, the same effects as those of the first to third embodiments can be expected in both the caulking joint strength and the heat dissipation effect.

  Further, since the fixed contact 32 is fixed to the fixed spring 33, the fixed spring 33 is elastically deformed when in contact with the movable contact 42, so that the contact point moves after the contact, so that when the contacts are separated from each other. Increases the force to peel off the weld by the amount of movement. As a result, the electrical life of the electromagnetic relay can be extended.

  In the embodiment described above, the poled relay that uses the permanent magnet 22 and performs the reversal operation by flowing forward and reverse currents is exemplified. However, the present invention can also be applied to a nonpolar relay that does not specify a pole. As a non-polar relay, for example, an L-shaped armature is used, the armature is rotated by exciting the coil, the movable spring is elastically deformed via the card, the contact is closed, and the armature is returned and rotated by demagnetization. In some cases, the movable spring is elastically returned to open the contact.

1 is a perspective view of an electromagnetic relay according to a first embodiment of the present invention. It is a perspective view of the movable spring block (combined body of a movable spring, a shunt plate, and a movable terminal plate) used for the electromagnetic relay. It is the front view which showed the contact open state of the same electromagnetic relay. It is the front view which showed the contact contact state of the electromagnetic relay. It is a general | schematic fragmentary front view of the card | curd which showed the connection state of the movable spring and the flow dividing plate. It is a front view of the movable contact spring block used for the electromagnetic relay which concerns on 2nd Embodiment of this invention. It is a perspective view of the movable contact spring block used for the electromagnetic relay which concerns on 3rd Embodiment of this invention. It is a perspective view of the fixed contact block used for the electromagnetic relay which concerns on 4th Embodiment of this invention. (A), (b) is the figure which showed the trouble in the conventional electromagnetic relay.

Explanation of symbols

A Electromagnet block 11 Relay 13 Coil part B Armature block 21 Armature 22 Permanent magnet 23 Auxiliary yoke 24 Hinge spring C Fixed contact block 31 Fixed terminal plate 32 Fixed contact 33 Fixed spring (fourth embodiment)
34. Fixed side reinforcing plate (fourth embodiment)
35 Caulking section (fourth embodiment)
D movable contact spring block 41 movable spring 41a insertion piece 41b sensitivity adjustment small piece 41c slit cutting portion 42 movable contact 43 movable terminal plate 43a sensitivity adjustment support piece 43b arm portion 44 flow dividing plate 44a insertion piece 44b overlapping portion 44c bending portion 44d fixed Part 45 Caulking part 46 Reinforcing plate (third embodiment)
50 Body 60 Card 61 Insertion hole for armature 62 Insertion hole for movable spring / distribution plate

Claims (6)

A movable armature that is equipped with an armature that performs a predetermined reversal operation in response to changes in the excitation state of the electromagnet and a movable contact that moves toward and away from the fixed contact, and superimposes a flow dividing plate that divides the current flowing through the movable contact A spring and one end are connected to the armature and the other end is connected to the movable spring, and the movable spring is switched and moved with respect to the fixed contact in accordance with the reversing operation of the armature. In an electromagnetic relay with a card
An electromagnetic relay in which the flow dividing plate is extended to the other end of the card and connected to the card together with the movable spring. In claim 1,
The movable spring is joined to a movable terminal plate, and the movable spring is supported in a state in which the movable spring is elastically deformed in the middle of the contact and separation of the movable contact with the fixed contact. A sensitivity adjustment support piece to
The sensitivity adjustment support piece is an electromagnetic relay having a structure in which a support piece for supporting the movable spring is provided at a tip of an arm portion extending to the vicinity of the movable contact. In claim 2,
An electromagnetic relay in which the movable spring further includes a sensitivity adjustment piece, and the portion is brought into contact with the sensitivity adjustment support piece to be supported. In claim 2 or 3,
The sensitivity adjustment support piece is an electromagnetic relay configured to support the movable spring so as to sandwich a part of the flow dividing plate. In any one of Claims 1-4,
An electromagnetic relay further comprising a reinforcing plate, and the reinforcing plate and the movable spring are caulked and joined by the movable contact so as to sandwich the flow dividing plate. In any one of Claims 1-5,
An electromagnetic relay in which the fixed contact is fixed by caulking to a fixed spring bonded to a fixed terminal plate and a fixed reinforcing plate superposed on the fixed spring.

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