JP5549642B2 - relay - Google Patents

Description

  The present invention relates to a relay that opens and closes an electric circuit by moving a movable contact and a fixed contact.

  Conventional relays open and close an electric circuit by positioning and fixing a fixed contact holding member having a fixed contact, moving one movable element equipped with the movable contact, and moving the movable contact and the fixed contact. It is supposed to be. More specifically, the movable member attracted by the electromagnetic force of the coil, the contact pressure spring that urges the movable element in the direction in which the fixed contact and the movable contact abut, the movable member in the direction in which the fixed contact and the movable contact are separated from each other. And a return spring for urging the mover.

  When the coil is energized, the movable member is driven away from the mover by electromagnetic force, and the mover is urged and moved by the contact pressure spring so that the fixed contact and the movable contact come into contact with each other. It is comprised so that a member and a needle | mover may leave | separate (for example, refer patent document 1).

Japanese Patent No. 3321963

  By the way, in a conventional relay, an electromagnetic repulsive force is generated when a current flows in a reverse direction at a portion where the movable contact and the fixed contact face each other at a contact portion between the movable contact and the fixed contact (hereinafter, this electromagnetic repulsive force is expressed as follows). Contact part electromagnetic repulsion). The contact portion electromagnetic repulsive force acts to separate the movable contact and the fixed contact. Therefore, the spring force of the contact pressure spring is set so that the movable contact and the fixed contact are not separated by the contact portion electromagnetic repulsion.

  However, since the contact portion electromagnetic repulsion force increases as the flowing current increases, the spring force of the contact pressure spring increases correspondingly as the current value increases. As a result, the physique of the contact pressure spring becomes large, and as a result, the physique of the electromagnetic relay becomes large.

  Accordingly, the applicant of the present invention disclosed in Japanese Patent Application No. 2010-165098 (hereinafter referred to as the prior application example) a relay in which the separation between the movable contact and the fixed contact is less likely to occur due to the Lorentz force in the direction against the electromagnetic repulsion force of the contact portion. Has proposed.

  Specifically, in the prior application example, as shown in FIG. 8, the magnet 26 is disposed so as to face the side surface (that is, the outer peripheral edge) of the plate-like movable element 23 having the movable contact 25. A line connecting the NS poles of the magnet 26 is perpendicular to the moving direction of the mover (the direction perpendicular to the paper surface in FIG. 8). The direction of the current flowing in the vicinity of the movable contact (that is, in the vicinity of the magnet 26) of the mover 23 is substantially perpendicular to the line connecting the NS poles of the magnet and perpendicular to the moving direction of the mover 23. It has become. Thereby, when the movable contact 25 and the fixed contact come into contact with each other and a current flows through the movable element 23, a Lorentz force in a direction opposite to the contact portion electromagnetic repulsive force is applied to the movable element 23.

  Here, the Lorentz force increases as the current density and the magnetic flux density increase. However, in the configuration in which the magnet 26 is opposed to the side surface of the mover 23 as in the prior application example, in the vicinity of the movable contact, the current is farther from the magnet than the side closer to the magnet (near J in FIG. 8) (see FIG. 8). 8 in the vicinity of the K portion), in other words, the current density on the side close to the magnet having a large magnetic flux density (near the J portion) is small, so that a sufficient Lorentz force is not generated. For this reason, there has been a possibility that a separation between the movable contact and the fixed contact may occur during energization of a large current in which the contact portion electromagnetic repulsion force increases.

  An object of this invention is to make it possible to prevent more reliably the opening between the movable contact and the fixed contact due to the electromagnetic repulsion force of the contact portion.

  In order to achieve the above object, according to the first aspect of the present invention, the movable contact and the fixed contact (14) are brought into and out of contact with each other by the movement of the plate-like movable element (23) having the movable contact (25). In the relay that opens and closes, a magnet (26) disposed close to the mover is provided, and the mover has a counter plate portion (231, 231) facing the magnet when the movable contact and the fixed contact are in contact with each other. 235, 236, 237, 238), and the surface perpendicular to the plate thickness direction of the outer surface of the mover is the plate thickness vertical surface, and the end surface on the magnetic pole side of the outer surface of the magnet is the magnetic pole end surface In the magnet, the line connecting the NS poles is perpendicular to the moving direction of the mover, the magnetic pole end surface is parallel to the plate thickness vertical plane of the opposing plate portion, and the movable contact and the fixed contact are in contact with each other In the state, the pole end face is placed so as to face the plate thickness vertical face. Lorentz force generated by the magnetic flux current and magnet passing through the part, characterized in that it is configured to be a direction for bringing the fixed contacts and the movable contact.

  According to this, by arranging the magnetic pole end face to face the plate thickness vertical surface in the opposing plate portion (231, 235, 236, 237, 238) in parallel, all the currents flowing through the opposing plate portion are magnetic fields. Since a large Lorentz force can be generated in the region where the magnetic flux density is large, the separation between the movable contact (25) and the fixed contact (14) due to the electromagnetic repulsion of the contact portion can be more reliably prevented. be able to.

  As in the invention according to claim 2, in the relay according to claim 1, the movable element (23) can be formed by bending a plate material.

  As in the invention according to claim 3, in the relay according to claim 2, the movable element (23) includes a contact mounting plate portion (230) to which the movable contact (25) is fixed, and a counter plate portion ( 231, 235, 236, 237, 238) can be perpendicular to the contact mounting plate.

  As in the invention according to claim 4, in the relay according to any one of claims 1 to 3, two movable contacts (25), a magnet (26), and two opposing plate portions (231) are provided, When the arrangement direction of the two movable contacts is the movable contact arrangement direction, the two movable contacts, the two magnets, and the two opposing plate portions are arranged in series along the movable contact arrangement direction, and the two movable contacts, Of the magnet and the two opposing plate portions, two movable contacts can be arranged on the innermost side in the movable contact arrangement direction, and two magnets can be arranged on the outermost side in the movable contact arrangement direction.

  According to a fifth aspect of the present invention, in the relay according to the fourth aspect, when the direction of the current flowing through the opposing plate portion (231) is the opposing plate portion current direction, the movable element (23) is a movable contact (25 ) Is fixed, the contact mounting plate portion (230) perpendicular to the moving direction of the mover, and the relay plate portion extending in the moving direction of the mover from one end side of the counter plate current direction in the contact mounting plate portion (232), and the counter plate portion extends in the counter plate current direction from the end of the relay plate portion on the side close to the magnet (26).

  According to this, it is possible to obtain a movable element in which the direction of the current flowing through the counter plate portion (231) is perpendicular to the moving direction of the movable element (23).

  As in the invention according to claim 6, in the relay according to any one of claims 1 to 3, two movable contacts (25) are provided, and the arrangement direction of the two movable contacts is defined as the movable contact arrangement direction. In this case, the opposing plate portion (236, 237, 238) can be extended in the movable contact arrangement direction, and the magnet (26) can be arranged in a direction perpendicular to the movable contact arrangement direction.

  As in the invention according to claim 7, in the relay according to claim 6, one counter plate portion (237) is provided, and two movable contacts (25) and one counter plate portion are arranged in the movable contact arrangement direction. The two movable contacts can be arranged on both end sides of the counter plate portion.

  According to an eighth aspect of the present invention, in the relay according to the seventh aspect, two magnets (26) are provided and arranged so as to sandwich the opposing plate portion (237).

  According to this, since the electric current which flows through an opposing board part (237) flows in the magnetic field of two magnets (26), a big Lorentz force can be generated.

  According to a ninth aspect of the present invention, in the relay according to any one of the first to eighth aspects, a coil that generates an electromagnetic force when energized, and a movable member (19, 21, 22) and a contact pressure spring (24) for urging the mover (23) in a direction in which the fixed contact (14) and the movable contact (25) abut against each other, and the movable member is attracted by the electromagnetic force of the coil. In this case, the movable member moves away from the movable element, and the movable element is biased by the contact pressure spring so that the fixed contact and the movable contact come into contact with each other.

  According to this, since a large Lorentz force can be generated to prevent the movable contact (25) and the fixed contact (14) from being separated by the electromagnetic repulsion force of the contact portion, the spring force of the contact pressure spring (24) can be prevented. Can be set small, and the contact pressure spring can be reduced in size, and thus the relay can be reduced in size.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a top view which shows the relay which concerns on 1st Embodiment of this invention. It is sectional drawing which follows the AA line of FIG. It is a figure which shows the needle | mover 23 and the permanent magnet 26 of FIG. It is a top view which shows the relay which concerns on 2nd Embodiment of this invention. It is a figure of the needle | mover 23 and the permanent magnet 26 which show the modification of the relay which concerns on 2nd Embodiment. It is a figure of the needle | mover 23 and the permanent magnet 26 in the relay which concerns on 3rd Embodiment of this invention. It is a figure of the needle | mover 23 and the permanent magnet 26 in the relay which concerns on 4th Embodiment of this invention. It is a plane sectional view showing a relay of a prior application example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals in the drawings.

(First embodiment)
FIG. 1 is a plan view showing the relay according to the first embodiment of the present invention, and shows a state where the cover 12 of FIG. 2 is removed. 2 is a cross-sectional view taken along the line AA in FIG. 1, FIG. 3A is a plan view of the mover 23 and the permanent magnet 26 in FIG. 1, FIG. 3B is a front view, and FIG. It is sectional drawing which follows the BB line of Fig.3 (a).

  As shown in FIGS. 1 and 2, the relay according to the present embodiment includes a resin base 11 having a substantially rectangular parallelepiped shape and having an accommodating space 10 inside, and is made of resin so as to close an opening on one end side of the accommodating space 10. A cover 12 made of metal is coupled to the base 11.

  Two fixed contact holding members 13 made of conductive metal are fixed to the base 11. One end side of the fixed contact holding member 13 is located in the accommodation space 10 and the other end side projects into the external space. In the following description, one is called a first fixed contact holding member 13a and the other is called a second fixed contact holding member 13b as necessary.

  A fixed contact 14 made of conductive metal is caulked and fixed to an end of the fixed contact holding member 13 on the side of the accommodation space 10. A load circuit terminal 131 connected to an external harness (not shown) is formed on the external space side of the fixed contact holding member 13. The load circuit terminal 131 of the first fixed contact holding member 13a is connected to a power source (not shown) via an external harness, and the load circuit terminal 131 of the second fixed contact holding member 13b is connected via an external harness. Connected to an electrical load (not shown).

  A cylindrical coil 15 that generates an electromagnetic force when energized is coupled to the base 11 so as to close the opening at the other end of the accommodation space 10. The coil 15 is connected to an ECU (not shown) via an external harness, and the coil 15 is energized via the external harness.

  A flanged cylindrical plate 16 made of a magnetic metal material is disposed between the base 11 and the coil 15, and a yoke 17 made of a magnetic metal material is disposed on the opposite side of the coil 15 and the outer peripheral side. Is arranged. The plate 16 and the yoke 17 are fixed to the base 11.

  A fixed core 18 made of a magnetic metal material is disposed in the inner circumferential space of the coil 15, and the fixed core 18 is held by a yoke 17.

  In the inner circumferential space of the coil 15, a movable core 19 made of a magnetic metal is disposed at a position facing the fixed core 18. The movable core 19 is slidably held on the plate 16.

  Further, a return spring 20 that urges the movable core 19 toward the anti-fixed core is disposed between the fixed core 18 and the movable core 19. When the coil is energized, the movable core 19 is attracted toward the fixed core 18 against the return spring 20.

  The plate 16, the yoke 17, the fixed core 18, and the movable core 19 constitute a magnetic path of magnetic flux induced by the coil 15.

  A metal shaft 21 penetrates and is fixed to the movable core 19. One end of the shaft 21 extends toward the anti-fixed core side, and an insulator 22 made of a resin having high electrical insulation is fitted and fixed to the end portion on the one end side of the shaft 21. In addition, the movable core 19, the shaft 21, and the insulator 22 constitute a movable member of the present invention.

  A plate-like movable element 23 made of conductive metal is disposed in the accommodation space 10. A contact pressure spring 24 that biases the mover 23 toward the fixed contact holding member 13 is disposed between the mover 23 and the cover 12.

  A movable contact 25 made of conductive metal is caulked and fixed to the mover 23 at a position facing the fixed contact 14. When the movable core 19 or the like is driven to the fixed core 18 side by electromagnetic force, the fixed contact 14 and the movable contact 25 come into contact with each other.

  Two permanent magnets 26 are arranged close to the mover 23 on the outer peripheral side of the mover 23. In the present embodiment, the permanent magnet 26 has an S pole on the mover 23 side and an N pole on the counter mover side.

  Next, the detailed configuration and arrangement of the mover 23 and the permanent magnet 26 will be described with reference to FIG.

  Note that an arrow C in FIG. 3 indicates a current flow in the mover 23. Further, an arrow D in FIG. 3 indicates the direction of the magnetic flux.

  Here, in the present specification, the surface perpendicular to the plate thickness direction of the outer surface of the mover 23 is hereinafter referred to as a plate thickness vertical surface, and the end surface on the magnetic pole side of the outer surface of the permanent magnet 26 is the pole end surface. That's it. Incidentally, in the permanent magnet 26, the end face 26a on the N pole side and the end face 26b on the S pole side are magnetic pole end faces. The direction in which the two movable contacts 25 are arranged is referred to as the movable contact arrangement direction.

  The mover 23 is formed by bending a plate material, and includes two contact mounting plate portions 230 to which the movable contact 25 is fixed, two outer plate portions 231 positioned on the outermost side in the movable contact arrangement direction, and a contact mounting plate portion. 230, two relay plate portions 232 connecting the outer plate portion 231 and one connecting plate portion 233 connecting the two outer plate portions 231, and one spring receiving plate portion 234 receiving the contact pressure spring 24. In addition, the shape of the needle | mover 23 when it planarly views like Fig.3 (a) is axisymmetric about the straight line E as an axis of symmetry. Moreover, the outer side plate part 231 in this embodiment is corresponded to the opposing board part of this invention.

  The contact mounting plate portion 230 has a plate thickness vertical surface that is perpendicular to the moving direction of the mover 23 (the vertical direction in FIG. 3A).

  When the flow direction of the current flowing through the outer plate portion 231 is the outer plate portion current direction (the vertical direction in FIG. 3A), the relay plate portion 232 is one end of the contact mounting plate portion 230 in the outer plate portion current direction. It extends in the moving direction of the mover 23 from the side.

  The outer plate portion 231 extends in the outer plate portion current direction from the end portion of the relay plate portion 232 near the permanent magnet 26 and is perpendicular to the contact mounting plate portion 230. The direction of the current flowing through the outer plate 231 is set to be perpendicular to both the line connecting the NS poles of the permanent magnet 26 and the moving direction of the mover 23. Incidentally, in the outer side plate part 231, the surface 231a facing the permanent magnet 26 and the surface 231b on the anti-permanent magnet side are plate thickness vertical surfaces.

  The connecting plate portion 233 connects the end portions on the anti-relay plate portion side of the two outer plate portions 231 together. Further, the spring receiving plate portion 234 is located in the middle portion in the longitudinal direction of the connecting plate portion 233, and the plate thickness vertical surface is perpendicular to the moving direction of the mover 23.

  The two movable contacts 25, the two permanent magnets 26, and the two outer plate portions 231 are arranged in series along the movable contact arrangement direction. More specifically, of the two movable contacts 25, the two permanent magnets 26, and the two outer plate portions 231, the two movable contacts 25 are arranged on the innermost side in the movable contact arrangement direction, and the two permanent magnets 26 are movable. It is arranged on the outermost side in the contact arrangement direction.

  The permanent magnet 26 is disposed close to the mover 23, and more specifically, is closest to the outer plate portion 231 of the mover 23. The permanent magnet 26 is arranged so that the line connecting the NS poles (the left-right direction in FIG. 3A) is perpendicular to the moving direction of the mover 23, and the pole end face 26b on the S pole side. Are arranged in parallel to and opposite to the plate thickness vertical surface 231a of the outer plate 231.

  Further, the direction of the current flowing through the outer plate portion 231 is adjusted so that the Lorentz force generated by the current flowing through the outer plate portion 231 and the magnetic flux of the permanent magnet 26 comes into contact with the movable contact 25 and the fixed contact 14. The direction of the magnetic flux of the permanent magnet 26 is set.

  When the movable contact 25 and the fixed contact 14 are in contact with each other, almost the entire area of the plate thickness vertical surface 231a of the outer plate portion 231 is opposed to the magnetic pole end surface 26b of the permanent magnet 26. On the other hand, when the movable contact 25 and the fixed contact 14 are separated from each other, the Lorentz force is not necessary, so that the plate thickness vertical surface 231a of the outer plate portion 231 and the magnetic pole end surface 26b of the permanent magnet 26 face each other. It is not necessary (see FIG. 2).

  Next, the operation of the relay according to the present embodiment will be described. First, when the coil 15 is energized, the movable core 19, the shaft 21, and the insulator 22 are attracted toward the fixed core 18 against the return spring 20 by electromagnetic force, and the mover 23 is biased against the contact pressure spring 24. Then, it moves following the movable core 19 and the like. As a result, the movable contact 25 abuts against the opposing fixed contact 14, the two load circuit terminals 131 are brought into conduction, and a current flows through the movable element 23 and the like. Incidentally, after the movable contact 25 comes into contact with the fixed contact 14, the movable core 19 and the like further move toward the fixed core 18, and the insulator 22 and the movable element 23 are separated.

  In a state where the two load circuit terminals 131 are electrically connected and a current flows through the mover 23, Lorentz force acts on the mover 23. Since the Lorentz force is a force in a direction in which the movable contact 25 and the fixed contact 14 are brought into contact with each other, that is, a force that opposes the contact portion electromagnetic repulsion force, the movable contact 25 and the fixed contact due to the contact portion electromagnetic repulsion force. The separation between the fourteen is less likely to occur.

  Here, since the magnetic pole end surface 26b of the permanent magnet 26 is disposed in parallel and opposite to the plate thickness vertical surface 231a of the outer plate portion 231, all currents flowing through the outer plate portion 231 are magnetic fields. It flows through the region where the magnetic flux density is large. Therefore, a large Lorentz force can be generated, and the separation between the movable contact 25 and the fixed contact 14 due to the contact portion electromagnetic repulsive force can be more reliably prevented.

  On the other hand, when the power supply to the coil 15 is cut off, the movable core 19 and the movable element 23 are urged toward the anti-fixed core side by the return spring 20 against the contact pressure spring 24. As a result, the movable contact 25 is separated from the fixed contact 14 and the two load circuit terminals 131 are disconnected.

  At this time, a Lorentz force acts on the arc generated when the first movable contact 25 moves away from the first fixed contact 14 by the permanent magnet 26, and the arc is stretched by the Lorentz force to interrupt the arc.

  According to this embodiment, it is possible to generate a large Lorentz force and more reliably prevent the movable contact 25 and the fixed contact 14 from being separated by the contact portion electromagnetic repulsion force. Along with this, the spring force of the contact pressure spring 24 can be set small, and the contact pressure spring 24 can be downsized, and the relay can be downsized.

(Second Embodiment)
A second embodiment of the present invention will be described. FIG. 4 is a plan view showing a relay according to the second embodiment of the present invention, and shows a state where a cover is removed. Only the parts different from the first embodiment will be described below.

  As shown in FIG. 4, in the present embodiment, the position of the first fixed contact holding member 13a is changed. More specifically, the load circuit terminal 131 of the first fixed contact holding member 13a and the second fixed contact The load circuit terminal 131 of the holding member 13 b protrudes to the outside at a diagonal position of the base 11.

  Further, the shape of the mover 23 is changed corresponding to the position change of the first fixed contact holding member 13a, and the shape of the mover 23 when viewed in plan as shown in FIG. It has been changed to a point-symmetric shape.

  Specifically, the connecting plate portion is divided into a first connecting plate portion 235 on the side close to the first fixed contact holding member 13a and a second connecting plate portion 236 on the side close to the second fixed contact holding member 13b. ing. One end sides of the first connecting plate portion 235 and the second connecting plate portion 236 are connected to the outer plate portion 231, and the other end side of the first connecting plate portion 235 and the other end side of the second connecting plate portion 236 are connected to each other. The spring receiving plate portion 234 is connected.

  This change in the shape of the mover 23 changes the current flow direction C in the outer plate 231 on the side close to the first fixed contact holding member 13a, so that N in the permanent magnet 26 on the side close to the first fixed contact holding member 13a. The direction D of the magnetic flux of the permanent magnet 26 on the side close to the first fixed contact holding member 13a is changed with the pole end surface 26a on the pole side facing the outer plate 231.

  As a result, the Lorentz force generated by the current flowing through the outer plate 231 on the side close to the first fixed contact holding member 13a and the magnetic flux of the permanent magnet 26 on the side close to the first fixed contact holding member 13a is fixed to the movable contact 25. The contact direction is brought into contact with the contact 14.

  In the present embodiment, the magnetic pole end surfaces 26a and 26b of the permanent magnet 26 are disposed in parallel and opposite to the plate thickness vertical surface 231a of the outer plate portion 231, so that the outer plate portion 231 is disposed. All the flowing current flows in a region where the magnetic flux density in the magnetic field is large. Therefore, a large Lorentz force can be generated, and the separation between the movable contact 25 and the fixed contact 14 due to the contact portion electromagnetic repulsive force can be more reliably prevented.

  Here, FIG. 5A is a plan view of the mover 23 and the permanent magnet 26 showing a modification of the relay according to the present embodiment, and FIG. 5B is a cross section taken along the line GG of FIG. 5A. FIG.

  In the present embodiment, the two permanent magnets 26 and the two outer plate portions 231 are arranged in series along the movable contact arrangement direction, and the permanent magnet 26 and the outer plate portion 231 are opposed to each other. As in the modified example, the permanent magnet 26 may be arranged in a direction perpendicular to the movable contact arrangement direction, and the permanent magnet 26 may be opposed to the first connecting plate portion 235 and the second connecting plate portion 236.

  More specifically, the permanent magnet 26 is arranged so that the line connecting the NS poles (the vertical direction in FIG. 5A) is perpendicular to the moving direction of the mover 23. Further, the first connecting plate portion 235 and the magnetic pole end surface 26a of the permanent magnet 26 facing the first connecting plate portion 235 are parallel and opposed to each other. Further, the second connecting plate portion 236 and the magnetic pole end face 26b of the permanent magnet 26 facing the second connecting plate portion 236 are parallel and opposed to each other. In this modification, the first connecting plate portion 235 and the second connecting plate portion 236 correspond to the opposing plate portion of the present invention.

(Third embodiment)
A third embodiment of the present invention will be described. FIG. 6A is a plan view of the mover 23 and the permanent magnet 26 in the relay according to the third embodiment of the present invention, and FIG. 6B is a cross-sectional view taken along the line H-H in FIG. .

  In the present embodiment, the configuration of the mover 23 and the position of the permanent magnet 26 are changed. The other aspects are the same as those in the first embodiment, and therefore only different parts will be described.

  As shown in FIG. 6, in the mover 23, two contact mounting plate portions 230 to which the movable contact 25 is fixed are connected by one connecting plate portion 237. The two movable contacts 25, the two contact mounting plate portions 230, and the connecting plate portion 237 are arranged in series along the movable contact arrangement direction, and the two movable contacts 25 and the two contact mounting plate portions 230 are connected to each other. It arrange | positions at the both ends of the board part 237. FIG.

  The connecting plate portion 237 has a plate thickness vertical plane that is parallel to the moving direction of the movable element 23 (the vertical direction in FIG. 6A) and the movable contact arrangement direction. In addition, the connection board part 237 in this embodiment is corresponded to the opposing board part of this invention.

  The permanent magnet 26 faces and is close to the connecting plate portion 237, and is disposed so as to sandwich the connecting plate portion 237.

  The direction of the current flowing through the connecting plate portion 237 is adjusted so that the Lorentz force generated by the current flowing through the connecting plate portion 237 and the magnetic flux of the permanent magnet 26 comes into contact with the movable contact 25 and the fixed contact 14. The direction of the magnetic flux of the permanent magnet 26 is set.

  Specifically, the permanent magnet 26 is arranged so that the line connecting the NS poles (the vertical direction in FIG. 6A) is perpendicular to the moving direction of the mover 23. In addition, one permanent magnet 26 is arranged such that the N pole side magnetic pole end surface 26a is parallel to and opposed to the plate thickness vertical surface of the connecting plate portion 237, and the other permanent magnet 26 is the S pole side magnetic pole. The end face 26 b is disposed in parallel to and opposite to the plate thickness vertical plane in the connecting plate portion 237.

  In the present embodiment, the magnetic pole end surfaces 26 a and 26 b of the permanent magnet 26 are disposed in parallel and opposite to the plate thickness vertical surface of the connecting plate portion 237, and thus flow through the connecting plate portion 237. All currents flow through the region where the magnetic flux density in the magnetic field is large. Therefore, a large Lorentz force can be generated, and the separation between the movable contact 25 and the fixed contact 14 due to the contact portion electromagnetic repulsive force can be more reliably prevented.

  Further, since the connecting plate portion 237 is sandwiched between the two permanent magnets 26 and the current flowing through the connecting plate portion 237 flows in the magnetic field of the two permanent magnets 26, a large Lorentz force can be generated.

(Fourth embodiment)
A fourth embodiment of the present invention will be described. Fig.7 (a) is a top view of the needle | mover 23 and the permanent magnet 26 in the relay which concerns on 4th Embodiment of this invention, FIG.7 (b) is a front view.

  In the present embodiment, the configuration of the mover 23 and the position of the permanent magnet 26 are changed. The other aspects are the same as those in the first embodiment, and therefore only different parts will be described.

  As shown in FIG. 7, in the movable element 23, two contact mounting plate portions 230 to which the movable contact 25 is fixed are connected by one connecting plate portion 238 that extends long along the movable contact arrangement direction.

  The two contact mounting plate portions 230 are disposed on both ends in the longitudinal direction of the connecting plate portion 238. Further, the connecting plate portion 238 extends to the outermost position in the movable contact arrangement direction in the two contact mounting plate portions 230.

  The connecting plate portion 238 has a plate thickness vertical plane that is parallel to the moving direction of the movable element 23 (the vertical direction in FIG. 7A) and the movable contact arrangement direction. In addition, the connection board part 238 in this embodiment is corresponded to the opposing board part of this invention.

  The permanent magnet 26 is opposed to and close to the connecting plate portion 238 and is disposed only on one plate thickness vertical surface side of the connecting plate portion 238.

  The direction of the current flowing through the connecting plate portion 238 is adjusted so that the Lorentz force generated by the current flowing through the connecting plate portion 238 and the magnetic flux of the permanent magnet 26 comes into contact with the movable contact 25 and the fixed contact 14. The direction of the magnetic flux of the permanent magnet 26 is set.

  Specifically, the permanent magnet 26 is arranged so that the line connecting the NS poles (the vertical direction in FIG. 7A) is perpendicular to the moving direction of the mover 23, and on the S pole side. The magnetic pole end face 26 b is disposed in parallel and opposite to the plate thickness vertical plane in the connecting plate portion 238.

  In the present embodiment, the magnetic pole end face 26b of the permanent magnet 26 is disposed in parallel and opposite to the plate thickness vertical surface of the connecting plate portion 238, so that all of the flow through the connecting plate portion 238 is provided. The current flows through a region where the magnetic flux density in the magnetic field is large. Therefore, a large Lorentz force can be generated, and the separation between the movable contact 25 and the fixed contact 14 due to the contact portion electromagnetic repulsive force can be more reliably prevented.

  The mover 23 is easy to make because of its simple shape. Further, since the connecting plate portion 238 extends to the outermost position in the movable contact arrangement direction in the two contact mounting plate portions 230, it becomes easy to employ the large permanent magnet 26, and a large Lorentz force can be generated.

(Other embodiments)
In each of the above embodiments, the movable core 19 and the like are attracted to the fixed core 18 side by the electromagnetic force of the coil 15, but the movable core 19 and the like are driven to the fixed core 18 side by driving means other than the coil 15. May be.

  Further, in each of the above-described embodiments, the fixed contact 14 of another member is caulked and fixed to the fixed contact holding member 13, but the protruding portion protruding toward the movable element 23 side is fixed to the fixed contact holding member 13 by, for example, press working. The protrusions may be fixed contacts.

  Similarly, in each of the above embodiments, the movable contact 25, which is a separate member, is caulked and fixed to the mover 23. However, a protrusion protruding toward the fixed contact holding member 13 is provided on the mover 23 by, for example, pressing. It is also possible to form the protrusion and use the protrusion as a movable contact.

  Each of the above embodiments can be arbitrarily combined within a practicable range.

14 fixed contact 23 mover 25 movable contact 26 magnet 231 counter plate part 236 counter plate part 237 counter plate part 238 counter plate part

Claims (9)

In a relay that opens and closes an electric circuit by moving a plate-like movable element (23) having a movable contact (25) to move the movable contact and the fixed contact (14) apart from each other,
Comprising a magnet (26) disposed proximate to the mover;
The movable element includes a counter plate portion (231, 235, 236, 237, 238) that faces the magnet when the movable contact and the fixed contact are in contact with each other.
When the surface perpendicular to the plate thickness direction of the outer surface of the mover is a plate thickness vertical surface, and the end surface on the magnetic pole side of the outer surface of the magnet is a magnetic pole end surface,
In the magnet, the line connecting the NS poles is perpendicular to the moving direction of the mover, the magnetic pole end surface is parallel to the plate thickness vertical surface of the counter plate portion, and the movable contact and the fixed The magnetic pole end surface is arranged so as to face the plate thickness vertical surface when in contact with the contact point,
A relay characterized in that a Lorentz force generated by a current flowing through the counter plate and a magnetic flux of the magnet is configured to contact the movable contact and the fixed contact.   The relay according to claim 1, wherein the movable element (23) is formed by bending a plate material. The movable element (23) includes a contact mounting plate (230) to which the movable contact (25) is fixed,
The relay according to claim 2, wherein the counter plate portion (231, 235, 236, 237, 238) is perpendicular to the contact mounting plate portion. Two each of the movable contact (25), the magnet (26) and the counter plate portion (231) are provided,
When the direction in which the two movable contacts are arranged is the movable contact arrangement direction,
The two movable contacts, the two magnets, and the two opposing plate portions are arranged in series along the movable contact arrangement direction,
Of the two movable contacts, the two magnets, and the two opposing plate portions, the two movable contacts are arranged on the innermost side in the movable contact arrangement direction, and the two magnets are the most in the movable contact arrangement direction. The relay according to any one of claims 1 to 3, wherein the relay is arranged outside. When the direction of the current flowing through the counter plate portion (231) is the counter plate portion current direction,
The movable element (23) has the movable contact (25) fixed to the movable element (23), a contact attachment plate part (230) perpendicular to the moving direction of the movable element, and the opposing plate part in the contact attachment plate part A relay plate portion (232) extending in the moving direction of the mover from one end side in the current direction,
5. The relay according to claim 4, wherein the counter plate portion extends in an electric current direction of the counter plate portion from an end portion of the relay plate portion close to the magnet. Two movable contacts (25) are provided,
When the direction in which the two movable contacts are arranged is the movable contact arrangement direction,
The counter plate portions (236, 237, 238) extend in the movable contact arrangement direction,
The relay according to any one of claims 1 to 3, wherein the magnet (26) is arranged in a direction perpendicular to the movable contact arrangement direction. One counter plate portion (237) is provided,
The two movable contacts (25) and the one opposed plate portion are arranged in series along the movable contact arrangement direction, and the two movable contacts are arranged on both ends of the opposed plate portion. The relay according to claim 6.   The relay according to claim 7, wherein two magnets (26) are provided and arranged so as to sandwich the counter plate portion (237). A coil that generates electromagnetic force when energized;
A movable member (19, 21, 22) attracted by the electromagnetic force of the coil;
A contact pressure spring (24) for urging the mover (23) in a direction in which the fixed contact (14) and the movable contact (25) are in contact with each other;
When the movable member is attracted by the electromagnetic force of the coil, the movable member moves away from the movable element, and the movable element is urged by the contact pressure spring so that the fixed contact and the movable contact are moved. The relay according to any one of claims 1 to 8, wherein the relay is configured to abut against each other.

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