JP2008270196A - Electromagnetic relay - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic relay capable of enhancing wiping action between a pair of contacts mutually in contact and improving contact reliability. <P>SOLUTION: The electromagnetic relay is provided with a fixed side spring member having a fixed contact, a movable side spring member which is arranged opposed to the fixed side spring member through a certain gap in nearly vertical posture and has a movable contact in free contact and separation to the fixed contact at the inner face, and a slide member which is capable of sliding in nearly horizontal posture and contacts the outer face of the movable side spring member to push the movable side spring member toward the fixed side spring member in order to contact the movable contact to the fixed contact. The slide member has a force portion to push the tip of the movable side spring member at the opposed end part on one side in width direction crossing in sliding direction of the slide member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is applied to, for example, refrigerators, washing machines, home appliances, etc., and includes an electromagnet, an armature that is attracted to the electromagnet and pivots, and a pair of spring pieces as a contact element that opens and closes in conjunction with the armature. It is related with the electromagnetic relay which has.

  Generally, a fixed-side spring piece and a movable-side spring piece, which are arranged to face each other via a certain gap and are each supported in a cantilever state, the fixed-side spring piece has a fixed contact on the opposite surface, The movable-side spring piece has a movable contact that can come into contact with and separate from the fixed contact, and is shown in FIGS. 9 and 109 as an electromagnetic relay in which the fixed contact and the movable contact constitute a normally open contact. There is. This electromagnetic relay 80 is positioned opposite to the magnetic pole surface with a certain distance from an iron core having a magnetic pole surface at one end in the longitudinal direction, and pivots with the base end as a fulcrum when the electromagnet is excited. Are connected to the free end of the armature 88, and a slide member 83 that reciprocates in the longitudinal direction of the electromagnet in conjunction with the armature 88. On the left and right sides of the other end of the slide member 83, a pair of protrusions 89a and 89b connected at two positions on the free end side of the movable spring piece 81 are provided. The pair of protrusions 89 a and 89 b are formed at the same protrusion height in the sliding direction of the slide member 83.

  The electromagnetic relay functions as follows. When power is supplied from the outside to the coil wound around the iron core via the coil terminal 90, the iron core is magnetized, the armature 88 is attracted to the magnetic pole surface which is the end surface of the iron core, and the armature 88 is at the base end. It pivots as a fulcrum and is attracted to the magnetic pole surface. The slide member 83 having one end connected to the free end side of the armature 88 slides in conjunction with the armature 88. The slide member 83 that moves linearly presses the movable side spring piece 81 connected to the other end of the slide member 83 toward the fixed side spring piece 82, so that the fixed contact 86 and the movable contact 85 that are normally open contacts are provided. They are in electrical contact with each other. The pair of contacts 85 and 86 are configured to contact each other by causing a wiping action in the longitudinal direction X which is the longitudinal direction of the movable spring piece 81.

  Another example of a conventional electromagnetic relay is disclosed in Patent Document 1. In this electromagnetic relay, the wiping action of the pair of contacts is changed by making the projecting lengths of the pair of projecting parts projecting in the sliding direction different from each other on the left and right sides of the end of the slide member that presses the movable spring piece. It can also occur in the direction (left-right direction). The wiping action of the pair of contacts prevents welding between the contacts and improves the contact reliability between the contacts.

JP 2002-343215 A

  When the height of the pair of protrusions formed on the left and right sides at the other end of the slide member is different, a lateral wiping action can be generated between the pair of contacts, but the lateral movement There is a restriction that the distance (wiping distance) depends on the difference in height between the pair of protrusions. For this reason, when the difference in height between the pair of protrusions is small, the lateral movement distance becomes small, and there is a concern that wiping between the pair of contacts cannot be performed effectively.

  The effect of wiping also depends on the shape of the movable side spring piece, and there is a restriction that the wider and thicker the movable side spring piece, the lower the spring property and the lower the wiping effect. In the electromagnetic relay, since the movable side spring piece is connected at two points by the slide member, the movable side spring piece becomes wider by that amount, and the spring property is lowered, so that the lateral direction is reduced. There is a problem that the effect of wiping is reduced.

  Further, in the electromagnetic relay, since a slit is formed between the movable contact of the movable spring piece and the portion pressed by the protrusion of the slide member, the force that pushes the movable spring laterally by the slide member is slit. Therefore, there is a problem in that the lateral wiping effect cannot be enhanced because the lateral pushing force is not transmitted to the movable contact.

  In view of the above points, an object of the present invention is to provide an electromagnetic relay that can enhance the wiping action between a pair of contacts that are in contact with each other and can improve contact reliability.

  In order to achieve the above object, an electromagnetic relay according to claim 1 is arranged so that a fixed-side spring piece having a fixed contact is opposed to the fixed-side spring piece in a substantially vertical posture with a fixed gap between the fixed-side spring piece and the fixed contact. A movable side spring piece having a movable contact that can be contacted and separated is slidable in a substantially horizontal posture, and is brought into contact with the outer surface of the movable side spring piece to bring the movable contact into contact with the fixed contact. A slide member that presses the movable side spring piece toward the fixed side spring piece, and the slide member has a movable side spring piece at an opposite end on one side in the width direction that intersects the slide direction of the slide member. It has a pressing portion that presses the tip side of the.

  According to a second aspect of the present invention, in the electromagnetic relay according to the first aspect, the center of the movable contact is an operating point that receives a pressing force from the force applying portion of the slide member and a base end of the movable spring piece. When the sliding member slides and the movable side spring piece is pressed toward the fixed side spring piece, the movable side spring piece is twisted and the fixed side The fixed contact of the spring piece and the movable contact of the movable side spring piece are in sliding contact.

  According to a third aspect of the present invention, in the electromagnetic relay according to the first or second aspect, the action portion is a connection portion adjacent to the movable contact.

  According to a fourth aspect of the present invention, in the electromagnetic relay according to any one of the first to third aspects, a width dimension of the movable side spring piece is from a fixed end to a free end of the movable side spring piece. It is about 1/2 or less than the protrusion length.

  The invention according to claim 5 is the electromagnetic relay according to any one of claims 1 to 4, wherein the slide member extends in the sliding direction of the opposite end portion on the other side in the width direction of the slide member. And an extension for stabilizing the substantially horizontal posture of the slide member is provided, and the extension is provided at the free end of the movable side spring piece when the movable side spring piece is pressed by the slide member. It is supported by the supported part.

  As described above, according to the first aspect of the present invention, the free end of the movable side spring piece is pressed by the force-applying portion of the sliding member that moves linearly. Thus, the movable contact can be rolled in the lateral direction orthogonal to the longitudinal direction (vertical direction) of the fixed spring piece. Accordingly, the longitudinal direction (vertical direction) and the lateral direction movement of the fixed spring can be caused simultaneously on the contact surface between the fixed contact and the movable contact, and the wiping action between a pair of contacts that are in contact with each other is enhanced, and the contact reliability is increased. Can be improved.

  According to the second aspect of the present invention, since the action portion and the fixed end of the movable side spring piece are connected by a straight line, and the movable contact is located at a position away from this straight line, the slide member is free of the movable side spring piece. When the end is pressed, torsion easily acts on the movable side spring piece. Thereby, the wiping action can be further enhanced.

  According to the third aspect of the present invention, the force that pushes the movable spring piece by the slide member can be directly transmitted to the movable contact. For this reason, the moving distance of the movable contact in the lateral direction can be increased, and the wiping action can be enhanced.

  According to the fourth aspect of the present invention, the spring property of the movable spring is increased, the moving distance of the movable contact is increased, and the wiping action between the pair of contacts is improved.

  According to the invention described in claim 5, when the extension part of the slide member is supported by the support part provided at the free end of the movable side spring piece, the movable side spring piece is pressed by the slide member. In addition, the slide member is prevented from being inclined, and the posture stability of the slide member is increased. Thereby, the electromagnetic relay can be stably operated over a long period of time.

  Specific examples of embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 show an embodiment of an electromagnetic relay according to the present invention.

  As shown in FIG. 1, the electromagnetic relay 10 includes a base block 11, an electromagnet block 12 fixed to the base block 11, an armature 13 disposed on one end side of the electromagnet block 12 and attracted to the magnet by magnetic force, A pair of spring pieces 14 and 15 which are arranged on the other end side of the electromagnet block 12 and constitute a normally open contact, one end is connected to the armature 13 and the other end abuts the one spring piece 15 on the movable side. A slide member 16 that linearly moves in the longitudinal direction of the electromagnet block 12 in conjunction with the pole 13 and opens and closes the pair of spring pieces 14 and 15 is provided.

  The base block 11 includes a flat base 18 and a housing 19 that accommodates an electromagnet, and is integrally injection-molded with an electrically insulating resin material. The housing 19 is formed integrally with the base 18 leaving a space behind the base 18, and has a peripheral wall that defines a housing space for housing the electromagnet block 12, and a front end opening 21 that communicates with the housing space on the front side. ing. On the back side of the housing space, there is a back wall 22 that separates the pair of spring pieces 14 and 15 from the electromagnet block 12 housed in the housing space. The inner surface of the peripheral wall 20 is provided with a plurality of locking portions (not shown) that lock the electromagnet block 12 inserted from the front end opening 21 so as not to come out. A through groove 23 is formed in the space behind the base 18 so as to penetrate in the thickness direction at a predetermined position. A tab-like terminal 40 formed at one end of the pair of spring pieces 14 and 15 in the through groove 23. , 41 are press-fitted so that the tip ends protrude from the back surface of the base 18, and the pair of spring pieces 14, 15 are fixed in a state where they stand upright with respect to the plate surface of the base 18.

  The electromagnet block 12 includes an insulating bobbin 25, an iron core 26 that is inserted into the bobbin 25 and has a magnetic pole surface 27 at the front end, a coil 28 that is wound around the iron core 26, and one end connected to the coil 28. A coil terminal 29 is connected and connected at the other end to an external power source (not shown). The bobbin 25 is a resin-molded insulator, and has a hollow cylindrical portion 30 that houses the iron core 26 inside, and a pair of flange portions 32 a and 32 b that are integrally formed at both front and rear ends of the cylindrical portion 30. ing.

  The iron core 26 is made of, for example, magnetic steel, has a cylindrical shape, and is fixedly received in the cylindrical portion 30 of the bobbin 25. The front end surface of the iron core 26 is a magnetic pole surface 27, and the magnetic pole surface 27 is exposed from the end of the bobbin 25. On the magnetic pole surface 27, the armature 13 disposed opposite to the magnetic pole surface 27 is attracted and attracted by electromagnetic force. The coil 28 is tightly wound around the outer surface of the cylindrical portion 30 between the two flange portions 32a and 32b of the bobbin 25 with the required length of the conducting wire.

  An L-shaped yoke 33 for increasing the magnetic flux density is attached to the lower side of the bobbin 25. The yoke 33 is fixed to the bobbin 25 by caulking, for example. The yoke 33 is an L-shaped member formed of, for example, magnetic steel, and a vertically rising portion 34 a is disposed to face the flange portion 32 a on the rear side of the bobbin 25, and the horizontal portion 34 b is the bobbin 25. The lower side is arranged in parallel with the iron core 26. The tip of the horizontal portion 34 b of the yoke 33 extends to the vicinity of the front end of the iron core 26. That is, the entire length of the yoke 33 is formed to be approximately the same as or longer than the iron core 26, and the magnetic flux of the magnetized iron core 26 is prevented from leaking to the outside, thereby increasing the magnetic flux density. ing. The tip of the horizontal portion 34 b of the yoke 33 is disposed to face the end of the support spring 35 that supports the armature 13.

  The armature 13 is made of, for example, magnetic steel, and is integrally held by the vertical portion 37a of the L-shaped support spring 35 so as to be opposed to the magnetic pole surface 27 of the iron core 26 at a constant interval. In the armature 13, a projecting portion 36 projecting substantially at the center of the plate surface is pressed into a hole 37 c formed in a vertical portion 37 a of the support spring 35. The horizontal portion 37 b of the support spring 35 is fixed to the lower side of the yoke 33. The vertical portion 37a of the support spring 35 is elastically displaceable in a direction in which the vertical portion 37a and the horizontal portion 37b intersect with each other with respect to the magnetic pole surface 27 of the iron core 26 with a base portion as a fulcrum. Therefore, when the iron core 26 is magnetized, the armature 13 is attracted by the magnetic force, the vertical portion 37 a of the support spring 35 is elastically displaced, and the armature 13 is attracted to the magnetic pole surface 27 of the iron core 26. When the iron core 26 is demagnetized, the armature 13 is separated from the magnetic pole surface 27 together with the vertical portion 37a of the support spring 35 by the elastic restoring force of the support spring 35, and the support spring 35 is elastically returned to the original position. That is, the intersecting portion of the vertical portion 37a and the horizontal portion 37b of the L-shaped support spring 35 functions as a portion corresponding to a hinge, and the armature 13 is separated from the magnetic pole surface 27 of the iron core 26 by its own spring action. Elastic force can be applied in the direction of leaving. The armature 13 is supported by such a support spring 35 so that it can swing back and forth with a portion corresponding to the hinge of the support spring 35 as a fulcrum.

  The pair of spring pieces 14 and 15 are leaf springs punched out into a predetermined shape from a conductive substrate such as phosphor bronze for a spring by pressing, and one spring piece 14 is a fixed side spring piece having a fixed contact 42. The other spring piece 15 is a movable side spring piece having a movable contact 45. The fixed-side spring piece 14 and the movable-side spring piece 15 are arranged through a predetermined gap so that the fixed contact 42 and the movable contact 45 are in electrical contact with the space behind the base block 11 on the opposite side of the armature 13. They are arranged opposite to each other (see FIGS. 2 and 3). That is, the fixed side spring piece 14 and the movable side spring piece 15 constitute a normally open contact, and when the movable spring 15 is pushed by the slide member 16 moving in conjunction with the armature 13, the pair of contacts 42 and 45 are closed. It comes to be formed.

  As shown in FIG. 3, the movable-side spring piece 15 has a terminal 41 that is press-fitted into the base 18 at one end as a fixed end, the other end is a free end, and is supported by the base 18 in a cantilever manner. The free end can be displaced within a limited range with the fixed end as a fulcrum. The fixed-side spring piece 14 is common to the movable spring 15 in that one end is a fixed end that is press-fitted into the base 18, but the fixed-side spring piece 14 has lower spring properties than the movable-side spring piece 15 and is free. The amount of displacement at the end is regulated compared to the movable spring 15. For this reason, when the movable side spring piece 15 is pushed by the slide of the slide member 16 and comes into contact with the fixed side spring piece 14, a constant contact pressure is maintained between the contact points of both springs 14, 15. .

The fixed side spring piece 14 and the movable side spring piece 15 will be described in more detail.
As shown in FIGS. 2 to 4, the fixed side spring piece 14 has a tab-like terminal 40 at one end and a button-like fixed contact 42 at the other end. The fixed contact 42 is a separate member from the fixed side spring piece 14 and is crimped (caulked) to the facing surface of the fixed side spring piece 14 that faces the movable side spring piece 15. The contact surface 47 of the fixed contact 42 is formed as a curved surface having a large curvature. In the vicinity of the fixed contact 42, an abutment piece 43 that abuts against the stopper 24 erected on the base 18 is formed so as to protrude in the lateral direction. When the contact piece 43 comes into contact with the stopper 24, the movement of the fixed spring piece 14 toward the movable spring piece 15 is restricted, and a predetermined gap is maintained between the pair of contacts 42 and 45. It has become. The tab terminal 40 is directly attached to the substrate with solder, for example.

  The movable side spring piece 15 is formed to be thinner than the fixed side spring piece 14 so that a smooth contact opening / closing operation can be performed under the action of electromagnetic force, and the spring property is enhanced. A tab-like terminal 41 is provided at one end, and a button-like movable contact 45 is provided at a position facing the fixed contact 42 at the other end. The movable contact 45 is a separate member from the movable side spring piece 15 and is crimped to the facing surface of the movable side spring piece 15 that faces the fixed side spring piece 14. The contact surface 48 of the movable contact 45 is formed as a curved surface having a large curvature. In the vicinity of the movable contact 45, a hole 46 that engages with a protrusion 49 protruding from the end of the slide member 16 is formed. Since the protrusion 49 is formed with a thin tip and a thick base, the protrusion 49 is smoothly inserted into the hole 46. When the protrusion 49 is further pushed deeper, the base side of the protrusion 49 engages with the hole edge of the hole 46, and the force applying portion 51, which is a vertical wall on the base side of the protrusion 49, is applied to the movable side spring piece 15. It comes to contact.

  The movable side spring piece 15 of the present embodiment is different from the conventional movable side spring piece 81 shown in FIG. 10 in that its tip is pressed by the force applying portion 51 provided on one side in the width direction of the slide member 16. Thereby, the width dimension of the movable side spring piece 15 can be made narrower than the conventional movable side spring piece 81, and the spring property of the movable side spring piece 15 can also be improved. The width dimension of the movable side spring piece 15 can be formed to be about ½ or smaller than the protruding length from the base end (fixed end) to the front end (free end) of the movable side spring piece 15. Thereby, the spring property of the movable-side spring piece 15 is enhanced, and the wiping action between a pair of contacts 42 and 45 described later is improved.

  The difference between the movable side spring piece 15 of the present embodiment and the conventional movable side spring piece 81 is that the movable side spring piece 15 of the present embodiment has one operating point that is pressed by the force applying portion 51 of the slide member 16. On the other hand, the conventional movable-side spring piece 81 has two points of action to be pressed from the slide member 16. Furthermore, in this embodiment, the center of the movable contact 45 is formed at a position deviating from a straight line connecting the base end and the hole 46. In other words, the center of the movable contact 45 is not located on a straight line connecting the base end and the hole 46. For this reason, when the movable side spring piece 15 of this embodiment is pressed by the slide member 16, the movable side spring piece 15 is twisted. On the other hand, even if the conventional movable side spring piece 81 is pushed by the slide member 83, the movable side spring piece 81 is not twisted. Therefore, the conventional movable contact 85 can slide only in the longitudinal direction X, which is the longitudinal direction of the movable spring 81, when contacting the fixed contact 86, but the movable contact 45 of the present embodiment is the longitudinal direction of the movable spring 15. It is possible to slide in two directions: a vertical direction X which is a direction and a horizontal direction Y orthogonal to the vertical direction X.

  FIG. 5 is an explanatory view showing a state in which the movable side spring piece 15 bends in the K1 direction and the fixed contact 42 and the movable contact 45 slide in the vertical direction X. FIG. 6 shows the movable side spring piece. 15 is an explanatory diagram showing a state in which 15 is bent in the K2 direction, and the fixed contact 42 and the movable contact 45 are moved in the lateral direction Y. As shown in FIG. 4, the position of the movable contact 45 of the movable spring piece 15 is at a position away from the base end by δ2 in the X direction and at a position away from the base end by δ1 in the Y direction. Therefore, as shown in FIG. 5B, when the movable side spring piece 15 is pushed by the slide member 16, the pair of contacts 42 and 45 come into contact with each other, and the movable side spring piece 15 draws an arcuate track K1 and is elastic. The contact is moved in the longitudinal direction X, which is the longitudinal direction of the movable side spring piece 15, from the start of contact until the contact is completely made. On the other hand, as shown in FIG. 6 (b), when the movable side spring piece 15 is pushed by the slide member 16, the pair of contacts 42 and 45 come into contact with each other, and the movable side spring piece 15 draws an arcuate track K2 and is elastic. The contact is moved in the lateral direction Y perpendicular to the longitudinal direction of the movable side spring piece 15 from the start of contact until the contact is completely made. Since δ2> δ1, the moving distance of the movable contact 45 is larger in the vertical direction X than in the horizontal direction Y. Although the moving distance of the movable contact 45 is very short, it has been found that even if the distance is short, the pair of contacts 42 and 45 slide on each other, which greatly affects the contact reliability of the contacts. ing.

  The movable contact 45 does not move independently (independently) in the two directions of the vertical direction X and the horizontal direction Y, but actually moves in an oblique direction in which the movement in the vertical direction X and the horizontal direction Y occurs simultaneously. . Therefore, the moving distance of the movable contact 45 is longer than in the conventional case, the wiping action between the pair of contacts 42, 45 is increased, and the contact reliability of the contact is improved.

  As shown in FIG. 4 and the like, the slide member 16 that presses the movable spring piece 15 is a member that has a frame shape that is injection-molded from a resin material having insulation properties. One end of the slide member 16 in the longitudinal direction is connected to the tip of the armature 13, and the other end is connected to the movable spring piece 15. The opening 50 on the inner side of the slide member 16 is formed to a size that engages with the guide portion 31 of the housing 19 of the base block 11, and when the opening 50 engages with the guide portion 31, the slide member 16 moves in the moving direction. To be guided. At the other end of the slide member 16, a protrusion 49 that engages with the hole 46 of the movable spring piece 15 is provided on one side in the width direction. The slide member 16 linearly moves in the longitudinal direction in conjunction with the swinging motion of the armature 13 accompanying magnet excitation, pushes the movable side spring piece 15 toward the fixed side spring piece 14 side, and causes the pair of contacts 42 and 45 to move. Close. That is, the swinging motion of the armature 13 causes the sliding member 16 to slide and pushes the movable contact 45.

  FIG. 7 shows a modification of the slide member of the present embodiment. This slide member 56A is the same as the slide member 16 in that a protrusion 49 that engages with the hole 46 of the movable side spring piece 60 is provided on one side in the width direction, but the other side in the width direction. This is different from the slide member 16 in that an extension 57 for stabilizing the horizontal posture of the slide member 56 is provided on one side. The extension portion 57 protrudes in the same direction as the direction in which the protrusion 49 protrudes. The length of the extension portion 57 is formed such that the distal end of the extension portion 57 is located at the same position as the tip end of the protrusion 49. The extension portion 57 enters the opening of the notch-shaped support portion 61 provided on the opposite side of the hole 46 of the movable spring piece 60 from the tip side having an inclined surface, and the slide member 56 in a horizontal posture. When the is inclined, the extension portion 57 is supported by the support portion 61. The cross-sectional shape of the extension portion 57 is formed to have a strength that does not damage the extension portion 57.

  Since the extension portion 57 is provided to prevent the slide member 56 in the horizontal posture from being inclined, the extension portion 57 does not have a portion corresponding to the force applying portion 51 provided on the base side of the protrusion 49. Therefore, even when the extension portion 57 is provided on the slide member 16 as in this modification, the movable side spring piece 15 is pressed only by the force applying portion 51 provided on one side of the slide member 56. It has become.

  In addition, the support part 61 is not restrict | limited to the aspect of this modification, It can also be formed as a hole. Since the support part 61 in this modification is notched, the extension part 57 can enter the support part 61 even if the cross-sectional dimension of the extension part 57 is large.

Next, the operation of the electromagnetic relay 10 will be described.
When the electromagnetic relay 10 is not operating, the armature 13 supported by the support spring 35 is at a position away from the magnetic pole surface 27 of the iron core 26 by a predetermined distance. At this time, the slide member 16 is in a retracted state at one position in the moving direction. The movable side spring piece 15 and the fixed side spring piece 14 connected to the slide member 16 are in a state where the movable contact 45 and the fixed contact 42 are opposed to each other by a predetermined distance. Next, when the electromagnetic relay 10 is actuated, the armature 13 pivots around the fulcrum portion of the support spring 35 by the attractive force, and is attracted to the magnetic pole surface 27 of the iron core 26 against the spring force of the support spring 35. . Accordingly, the slide member 16 moves linearly and pushes the movable side spring piece 15 so that the movable contact 45 and the fixed contact 42 come into contact with each other. Further, when the slide member 16 pushes the movable side spring piece 15, the movable side spring piece 15 is twisted with the base end supported by the base 18 as a fulcrum, and the vertical direction X and the horizontal direction Y of the movable side spring piece 15 are combined. The movable contact 45 and the fixed contact 42 slide a long distance on the contact surface. As a result, the movable contact 45 and the fixed contact 42 are closed.

  When the electromagnetic relay 10 is deactivated again, the armature 13 is separated from the magnetic pole surface 27 of the iron core 26 by the elastic restoring force of the support spring 35, the slide member 16 returns to the retracted position, and the movable contact 45 that has been in contact with it. And the fixed contact 42 are separated. In this way, each time the electromagnetic relay 10 is repeatedly activated / deactivated, the contact opening / closing operation is repeated. In the electromagnetic relay 10 of the present embodiment, since the pair of contacts 42 and 45 slide for a long distance, the cleaning effect on the contact surface is enhanced, and the increase in contact resistance is suppressed, thereby improving the contact reliability and the contact life. Can be provided.

  When assembling the electromagnetic relay 10, in addition to setting the gap between the pair of contacts to a predetermined size, the amount of bending of the movable side spring piece 15 when the pair of contacts 42 and 45 are closed, that is, the pair of contacts. In order to stabilize the operation of the electromagnetic relay and maintain the contact reliability, it is important to accurately set the amount of movement that the movable contact 45 moves obliquely by a predetermined distance after the contact 42, 45 of the contact is made. is there.

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the main point of this invention, it can deform | transform and implement variously. For example, in the present embodiment, the position of the protrusion 49 protruding from the end of the slide member 83 is the position shown in FIG. 5, but there are various positions as shown in FIGS. Can be provided in position.

1 is an exploded perspective view showing an embodiment of an electromagnetic relay according to the present invention. It is a top view of the state which assembled the electromagnetic relay shown in FIG. It is the side view of the state which assembled the electromagnetic relay similarly shown in FIG. It is a perspective view which similarly shows the movable spring and slide member of the electromagnetic relay shown in FIG. It is explanatory drawing which shows a mode that a movable spring moves to a vertical direction, (a) shows the state before a movable spring contacts, (b) has shown the state after a movable spring contacts. It is explanatory drawing which shows a mode that a movable spring moves to a horizontal direction, (a) shows the state before a movable spring contacts, (b) has shown the state after a movable spring contacts. It is a perspective view which shows the modification of a structure of a movable spring and a slide member. (A)-(d) is a perspective view which shows the modification of a movable spring and a slide member, respectively. It is a perspective view which shows an example of the conventional electromagnetic relay. FIG. 10 is a perspective view showing a pair of spring pieces and a slider member of the electromagnetic relay shown in FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electromagnetic relay 11 Base block 12 Electromagnet block 13 Armature 14 Spring piece (fixed side spring piece)
15 Spring piece (movable spring piece)
16 Slide member 42 Fixed contact 45 Movable contact 46 Connection part 49 Protrusion part

Claims (5)

A fixed-side spring piece having a fixed contact;
A movable-side spring piece that is disposed opposite to the fixed-side spring piece in a substantially vertical posture through a fixed gap, and has a movable contact on the inner surface that can be contacted and separated from the fixed contact;
A slide that is slidable in a substantially horizontal posture, and contacts the outer surface of the movable side spring piece and presses the movable side spring piece toward the fixed side spring piece in order to bring the movable contact into contact with the fixed contact. With members,
The said slide member is an electromagnetic relay which has the force application part which presses the front end side of the said movable side spring piece in the opposing edge part of the width direction crossing the slide direction of this slide member.   The center of the movable contact is located away from a straight line connecting two points of an action point that receives a pressing force from the force applying portion of the slide member and a base end of the movable side spring piece, and the slide member slides to When the movable side spring piece is pressed toward the fixed side spring piece, the movable side spring piece is twisted, and the fixed contact of the fixed side spring piece and the movable contact of the movable side spring piece slide. The electromagnetic relay according to claim 1 which contacts.   The electromagnetic relay according to claim 2, wherein the action portion is a connection portion adjacent to the movable contact.   4. The electromagnetic wave according to claim 1, wherein a width dimension of the movable side spring piece is about ½ or smaller than a protruding length from the fixed end to the free end of the movable side spring piece. 5. relay.   An extension portion that extends in the sliding direction of the slide member and stabilizes a substantially horizontal posture of the slide member protrudes from an opposite end portion on the other side in the width direction of the slide member, and the extension portion is the movable side spring. The electromagnetic relay of any one of Claims 1-4 currently supported by the support part provided in the said free end of a piece.

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