JP5890112B2 - Electromagnetic relay - Google Patents

Description

  The present invention relates to an electromagnetic relay.

  There is an electromagnetic relay such as a relay as an electronic component for controlling on / off of electric power using an electromagnet. When such an electromagnetic relay such as a relay is used for electric power such as a high voltage or a direct current, an arc is generated between the contacts, and this arc may reduce the life of the relay.

  For this reason, a method is disclosed in which a permanent magnet is provided in the vicinity of the contact, and the arc is generated by applying a force generated by the magnetic field of the permanent magnet to the arc generated when the contacts are separated from each other, and the arc is interrupted in a short time. .

  Moreover, the switch which can suppress the damage by the arc in a contact by providing an arc runner in the vicinity of a contact is disclosed.

JP 2001-176370 A JP 2009-87918 A Japanese Patent No. 2658170

  By the way, even if the arc can be interrupted quickly by the methods shown in Patent Documents 1 to 3, it is not possible to prevent the arc from being generated between the contacts, and the arc is generated even in a short time. For this reason, the contact and the vicinity of the contact are damaged by the arc, the life of the electromagnetic relay is shortened, and the safety and reliability of the electromagnetic relay may be lowered.

  Moreover, when the housing | casing etc. which form the electromagnetic relay are formed with resin materials, such as mold resin, organic gas etc. generate | occur | produce from resin material when the generated arc contacts resin material. In this case, when a component such as the generated organic gas adheres to the contact or the like, a conduction failure or the like may occur at the contact or the like. In particular, a yoke formed of a magnetic material may be used in order to efficiently apply a magnetic field in the vicinity of the contact point. However, an arc generated in such a yoke or the like is considered to be easily attracted, and is caused by the attracted arc. Heat may be transferred to the resin material to generate organic gas or the like. In addition, heat due to the arc attracted to the yoke or the like is transmitted to the permanent magnet, which raises the temperature of the permanent magnet and weakens the magnetic force of the permanent magnet.

  The present invention has been made in view of the above, and in an electromagnetic relay in which a yoke for applying a magnetic field in the vicinity of a contact is formed, the arc is difficult to be attracted to the yoke, and is reliable or safe. It is intended to provide an electromagnetic relay with high reliability, and in particular, in an electromagnetic relay corresponding to a voltage higher than the current commercial power supply voltage or a DC power supply or the like, a highly reliable or safe electromagnetic relay. Is intended to provide.

The present invention provides a fixed contact provided on a fixed contact spring, a movable contact provided on a movable contact spring, and a force applied to the movable contact spring via an armature to bring the movable contact into contact with the fixed contact. An electromagnet, a magnet for generating a magnetic field between the fixed contact and the movable contact, and the fixed contact spring, and provided at a position farther from the fixed contact spring than the fixed contact spring. A fixed-side arc runner that is connected to the movable contact spring, and a movable-side arc runner that is provided at a position away from the movable contact spring from a connecting portion between the movable contact spring and two of the magnetic arc material. A yoke, and a gap is provided between the fixed contact and the fixed-side arc runner, and a gap is provided between the movable contact and the movable-side arc runner. The two yokes are installed so as to be parallel to each other so as to sandwich the fixed contact and the movable contact, and are generated in the magnet in a region where the fixed contact and the movable contact are provided. The surface of the yoke on which the fixed contact and the movable contact are provided is provided with an insulating portion, respectively.

  In addition, the present invention is characterized in that the insulating portion is plate-shaped or applied to the yoke.

  In addition, the present invention is characterized in that the insulating portion is formed of an inorganic insulating material or an organic insulating material.

Further, the present invention is between the ends of the end portion of the front Symbol fixed side A Kuran'na the movable arc runner, wherein the arc-extinguishing grid is provided.

  The present invention is characterized in that the fixed-side arc runner, the movable-side arc runner, and the arc extinguishing grid are present in a space between the two insulating portions.

  The present invention also provides a fixed contact provided on the fixed contact spring, a movable contact provided on the movable contact spring, and a force applied to the movable spring via an armature to bring the movable contact into contact with the fixed contact. And a magnet for generating a magnetic field between the fixed contact and the movable contact, and between the electromagnet and the magnet, the fixed contact and the movable contact, or the fixed The contact spring and the movable contact spring are located.

  Further, the present invention has two yokes made of a magnetic material, and the two yokes are installed so as to be parallel to each other so as to sandwich the fixed contact and the fixed contact. A magnetic field generated in the magnet is applied to the fixed contact and a region where the fixed contact is provided.

  According to the present invention, in an electromagnetic relay in which a yoke for applying a magnetic field in the vicinity of a contact is formed, an electromagnetic relay having a structure in which an arc is hardly attracted to the yoke and having high reliability or safety is provided. Can do. In particular, in an electromagnetic relay corresponding to a voltage higher than the voltage of the current commercial power supply or a DC power supply, an electromagnetic relay with high reliability or safety can be provided.

Structure diagram of electromagnetic relay in this embodiment The perspective view of the electromagnetic relay in this Embodiment Explanatory drawing (1) of the electromagnetic relay in this Embodiment Explanatory drawing (2) of the electromagnetic relay in this Embodiment Explanatory drawing (3) of the electromagnetic relay in this Embodiment The perspective view of the stationary contact part of the electromagnetic relay in this Embodiment The perspective view of the movable contact part of the electromagnetic relay in this Embodiment Explanatory drawing of the fixed contact part and movable contact part of the electromagnetic relay in this Embodiment The perspective view of the other fixed contact part of the electromagnetic relay in this Embodiment The perspective view of the other movable contact part of the electromagnetic relay in this Embodiment Explanatory drawing of the manufacturing method of the electromagnetic relay in this Embodiment Flow chart of manufacturing method of electromagnetic relay in the present embodiment Explanatory drawing of the opening part of the electromagnetic relay in this Embodiment

  The form for implementing this invention is demonstrated below. In addition, about the same member etc., the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Electromagnetic relay)
The electromagnetic relay in this Embodiment is demonstrated. The electromagnetic relay according to the present embodiment includes a fixed contact portion 10 provided with a fixed contact 11, a fixed contact spring 12, a fixed-side arc runner 13, and the like, and a movable contact 21, a movable contact spring 22, a movable-side arc runner 23, and the like. And a contact portion 20. Further, an electromagnet part 30 is provided on the side where the movable contact part 20 is provided, and an armature 40 is provided at an end of the electromagnet part 30. The armature 40 is bent in the shape of a “he” at the center portion, and is connected so that the armature 40 can move around the center portion. In addition, the armature 40 becomes one side 40a which contacts the electromagnet part 30, and the other side 40b which operates the card | curd 41 mentioned later by making the bent center part into a boundary.

  Moreover, in this Embodiment, the electromagnet part 30 is formed of the twin coil. Since a single coil requires a diameter 2.5 times that of a twin coil, the electromagnetic relay can be further reduced in size by using a twin coil.

  The electromagnetic relay in the present embodiment is provided with a permanent magnet 50 for removing an arc and a yoke 60 formed of a magnetic material. An insulating portion 61 is provided on the opposing surfaces of the two yokes 60 via the fixed contact 11 and the movable contact 21.

  In the electromagnetic relay according to the present embodiment, when a current flows through the electromagnet part 30, a magnetic field is generated in the electromagnet part 30, and one side 40a of the armature 40 formed of a material containing a magnetic material such as iron is an electromagnet. The part 30 is contacted. As a result, the armature 40 is movable around the central portion, and the movable contact spring 22 is pushed to the fixed contact portion 10 side via the card 41 provided on the other side 40b of the armature 40 to be fixed to the movable contact 21. The contact 11 comes into contact. In this way, the fixed contact 11 and the movable contact 21 are electrically connected and turned on.

  Further, by interrupting the current flowing through the electromagnet unit 30, the magnetic field generated in the electromagnet unit 30 disappears, and the force that attracts the one side 40a of the armature 40 is lost. Thereby, the fixed contact 11 and the movable contact 21 are separated by the restoring force of the movable contact spring 22, etc., and the electrical connection between the fixed contact 11 and the movable contact 21 is released, and the state is turned off.

  At this time, an arc is generated between the fixed contact 11 and the movable contact 21, but the electromagnetic relay in the present embodiment applies a magnetic field generated by the permanent magnet 50 to a region where the fixed contact 11 and the movable contact 21 are provided. By applying through the yoke 60, the arc can be removed, and this arc can be transferred to the fixed-side arc runner 13 and the movable-side arc runner 23. In this way, by transferring the arc generated at the fixed contact 11 and the movable contact 21 to the fixed-side arc runner 13 and the movable-side arc runner 23, the arc can be removed from the fixed contact 11 and the movable contact 21 at an early stage. Damage to the contact 11 or the movable contact 21 due to the arc can be suppressed.

  The fixed-side arc runner 13 is formed along the direction in which the fixed contact spring 12 extends in the fixed contact portion 10, and the movable-side arc runner 23 is along the direction in which the movable contact spring 22 extends in the vicinity of the movable contact 21. However, the distance from the fixed contact arc runner 13 is gradually increased away from the movable contact 21. In this way, by forming the distance between the fixed-side arc runner 13 and the movable-side arc runner 23 so that they are gradually separated, the fixed-side arc runner 13 and the movable-side arc runner 23 can smoothly generate an arc while gradually increasing the distance between the arcs. You can run.

  Further, an arc extinguishing grid 70 is provided between the end of the fixed side arc runner 13 and the end of the movable side arc runner 23, and an arc is generated to the end of the fixed side arc runner 13 and the end of the movable side arc runner 23. After running, the arc can be extinguished by the arc extinguishing grid 70. Therefore, in order to effectively and smoothly extinguish the arc by the arc extinguishing grid 70, the arc extinguishing grid 70 is preferably provided between the end of the fixed arc runner 13 and the end of the movable arc runner 23. .

  In the electromagnetic relay according to the present embodiment, the fixed contact portion 10, the movable contact portion 20, and the electromagnet portion 30 are installed on one surface side of the base 80, and the fixed contact portion is disposed on the other surface side of the base 80. Terminals 81, 82, 83 connected to the unit 10, the movable contact unit 20, and the electromagnet unit 30 are provided. The case 90 and the cover 92 which are a part of the housing are a fixed contact portion 10, a movable contact portion 20, an electromagnet portion 30, an armature 40, a permanent magnet 50, and a yoke arranged on one surface side of the base 80. 60 and arc extinguishing grid 70 are formed so as to cover the base 80. In the electromagnetic relay according to the present embodiment, the exhaust port 95 is formed by the case 90 and the cover 92. Details of the exhaust port 95 will be described later.

(Magnetic flux and current)
Next, the direction of magnetic flux and the direction of current flow in the electromagnetic relay according to the present embodiment will be described with reference to FIGS. 3 to 5, the direction of current flow is indicated by arrow A, the direction of magnetic flux is indicated by arrow B, and the direction of the force applied to the arc (force applied to the electrons by the magnetic field) is indicated by arrow C. 3 is a diagram showing the main part viewed from the same plane as FIG. 1, FIG. 4 is a diagram showing the main part viewed from the direction indicated by arrow D1 in FIG. 1, and FIG. 1 is a diagram illustrating a main part viewed from a direction indicated by an arrow D2 in FIG.

  First, the permanent magnet 50 will be described. As the permanent magnet 50, a samarium cobalt magnet, a neodymium magnet, a ferrite magnet, or the like can be used, but a samarium cobalt magnet is preferable from the viewpoint of magnetic force and durability.

  Two yokes 60 are provided on both sides of the permanent magnet 50 so as to sandwich the fixed contact 11 and the movable contact 21 from both sides. The yoke 60 is formed in a plate shape from a material containing iron, cobalt, nickel, etc., and the magnetic field generated in the permanent magnet 50 is substantially perpendicular to the direction in which the fixed contact spring 12 extends and the direction in which the movable contact spring 22 extends. It is arrange | positioned so that it can apply to. Specifically, the yoke 60 is formed in a flat plate shape, and is installed so that the surfaces of the two yokes 60 are substantially parallel to each other, and one of the two yokes 60 is the S pole of the permanent magnet 50. The other is in contact with the N pole by magnetic force.

  The magnetic flux generated by the permanent magnet 50 passes through the two yokes 60 and generates a magnetic field in the space between the two yokes 60. The fixed contact 11 and the movable contact 21 exist in the space between the two yokes 60, and the direction of the magnetic flux is substantially perpendicular to the direction in which the fixed contact spring 12 extends and the direction in which the movable contact spring 22 extends. And it is applied so that the contact between the fixed contact 11 and the movable contact 21 is substantially perpendicular to the direction in which the contact is separated. In this embodiment, the magnetic field generated by the permanent magnet 50 by the two yokes 60 is strongly applied in a predetermined direction in the space between the two yokes 60. Therefore, the fixed contact 11, the movable contact 21, the fixed side arc runner 13, the movable side arc runner 23, and the arc extinguishing grid 70 exist in this space.

  As described above, in the present embodiment, the direction of the magnetic flux generated by the permanent magnet 50 via the yoke 60, the direction in which the contact between the fixed contact 11 and the movable contact 21, and the direction in which the fixed-side arc runner 13 extends are respectively They are almost orthogonal to each other.

  In the electromagnetic relay according to the present embodiment, the current is connected so as to flow from the fixed contact 11 to the movable contact 21. That is, when the fixed contact 11 and the movable contact 21 come into contact with each other, the terminal 81 connected to the fixed contact 10 is changed from the terminal 81 connected to the movable contact 20 via the fixed contact 11 and the movable contact 21. They are connected so that current flows.

  Thus, since a current flows from the fixed contact 11 to the movable contact 21, electrons flow from the movable contact 21 toward the fixed contact 11. In general, the movable contact spring 22 needs to move the movable contact 21, so that it is easily bent and is formed thinner than the fixed contact spring 12. Therefore, the heat capacity of the movable contact spring 22 is small. Therefore, when an arc is generated between the fixed contact 11 and the movable contact 21, the contact point on the side where the electrons collide becomes high temperature due to the collision of the electrons. Therefore, in the present embodiment, the current flows from the fixed contact 11. It is connected so as to flow to the movable contact 21.

  More specifically, since the fixed contact spring 12 is normally formed thick and has a large thermal capacity, when the electrons collide from the movable contact 21 toward the fixed contact 11, the fixed contact spring 12 or the like Although the thermal influence received by the collision is small, since the movable contact spring 22 is formed thin, the thermal capacity is small, and when electrons collide from the fixed contact 11 toward the movable contact 21, the heat caused by the collision of the electrons There is a high possibility that the movable contact spring 22 is melted and deformed by heat due to the influence of the influence. Therefore, in the present embodiment, the current is connected so that the current flows from the fixed contact 11 to the movable contact 21, that is, the electrons flow from the movable contact 21 to the fixed contact 11.

(Insulation part)
Next, the insulating part 61 will be described. By the way, considering the reason why the generated arc is likely to be attracted to the yoke 60, for example, the magnetic material forming the yoke 60 is a metal material containing Fe, Ni, Co, and has conductivity. Therefore, it is conceivable that the generated arc is drawn toward the arc 60 having conductivity. For this reason, since the surface of the yoke 60 where the arc is generated is covered with the insulating material, it is blocked by the insulating material, so that the arc is not attracted to the yoke 60 and the arc is prevented from flowing toward the yoke 60. Can be considered.

  In the electromagnetic relay according to the present embodiment, an insulating portion 61 is provided on the side of the opposing surfaces of the two yokes 60. Thereby, it is possible to prevent an arc generated between the opposing surfaces of the two yokes 60 from being drawn to the yoke 60.

  The insulating portion 61 is made of an insulating material, and specifically, an inorganic insulating material such as aluminum oxide, silicon oxide, aluminum nitride, or ceramics, or an organic insulating material such as a resin material. The insulating part 61 may be formed in a plate shape so as to cover the yoke 60, or may be formed by applying an insulating material to the surface of the yoke 60. Examples of the resin material include a fluororesin and a polyparaxylylene resin.

  In addition, since the portion in contact with the arc is heated, the insulating portion 61 is preferably formed of a material having a high melting point in order to prevent melting by the heat from the arc. Further, the insulating portion 61 is formed so as to substantially cover one surface of the yoke 60, and in the region between the insulating portions 61 formed on the two yokes 60, the fixed contact 11 that may cause an arc, The movable contact 21, the fixed arc runner 13, the movable arc runner 23, and the arc extinguishing grid 70 are included.

(Relationship between electromagnet and permanent magnet)
The electromagnetic relay in the present embodiment has an electromagnet part 30 and a permanent magnet 50, both of which generate a magnetic field. However, the electromagnet unit 30 has a function of bringing the fixed contact 11 and the movable contact 21 into contact with each other or separating them, and the permanent magnet has a function of removing an arc generated between the fixed contact 11 and the movable contact 21. Each has different functions.

  For this reason, if the positions of the electromagnet portion 30 and the permanent magnet 50 are close, the magnetic field generated on one side may affect the magnetic field on the other side. In particular, when the electromagnetic relay is downsized, adverse effects such as malfunctions may occur. May affect. For this reason, in the electromagnetic relay according to the present embodiment, as shown in FIG. 3, the electromagnet part 30 is arranged in the lower left part and the permanent magnet 50 is arranged in the upper right so as to sandwich the fixed contact 11 and the movable contact 21. ing. That is, the fixed contact 11 and the movable contact 21 are disposed between the electromagnet portion 30 and the permanent magnet 50. In this way, by separating the positions where the electromagnet unit 30 and the permanent magnet 50 are installed, the influence of the magnetic field generated on one side on the magnetic field on the other side, that is, the influence of each leakage magnetic field can be prevented.

  Moreover, in this Embodiment, the electromagnet part 30 for moving the movable contact 21 is arrange | positioned at the side of the movable contact 21 near the movable contact 21 from a viewpoint of size reduction, A permanent magnet 50 is arranged. In order to apply a strong magnetic field between the fixed contact 11 and the movable contact 21, it is preferable to dispose the permanent magnet 50 near the fixed contact 11 and the movable contact 21, and this is because the yoke 60 is provided. The same applies to the case where it is used.

(Fixed side arc runner and movable side arc runner)
Next, the fixed side arc runner and the movable side arc runner in the electromagnetic relay according to the present embodiment will be described.

  As shown in FIG. 6, the fixed contact portion 10 in the present embodiment is formed by punching a single metal plate and performing processing such as bending. The fixed contact spring 12 is provided with a fixed contact 11 in the vicinity of one end, and is connected to the fixed side support 14 at the other end. Further, a frame portion 15 connected to the fixed side support portion 14 is provided so as to surround the periphery of the fixed contact spring 12, and the fixed contact spring 12 and the frame portion 15 are formed to be substantially parallel. .

  Specifically, three sides of the fixed contact spring 12 are formed by punching a metal plate, and a frame portion 15 is formed around the fixed contact spring 12. The fixed contact spring 12 and the frame portion 15 are connected via a fixed-side support portion 14 at a portion corresponding to the remaining one side of the fixed contact spring 12 that has not been punched. Thereby, since the fixed contact spring 12 is displaced corresponding to the contact between the fixed contact 11 and the movable contact 21, etc., it can function as a spring. The frame portion 15 remains in a predetermined shape without being displaced corresponding to the contact between the fixed contact 11 and the movable contact 21, and the fixed-side protrusion 16 described later is kept in a predetermined position. Yes.

  A fixed-side arc runner 13 formed in the direction in which the fixed contact spring 12 extends is provided at the end of the frame portion 15 on the side opposite to the fixed-side support portion 14. A fixed-side protrusion 16 extending from the frame portion 15 toward the fixed contact 11 is provided on the side where the fixed contact 11 is provided in the direction opposite to the direction in which the fixed-side arc runner 13 extends. Note that the fixed-side protrusion 16 is bent in the vicinity of the connection portion between the fixed-side support portion 14 and the frame portion 15 so as to be close to the fixed contact 11.

  Further, as shown in FIG. 7, the movable contact portion 20 in the present embodiment is formed by punching a single metal plate and performing a process such as bending. The movable contact spring 22 is provided with a movable contact 21 in the vicinity of one end, and is connected to the movable support 24 at the other end. Further, a frame portion 25 connected to the movable side support portion 24 is provided so as to surround the periphery of the movable contact spring 22, and the movable contact spring 22 and the frame portion 25 are formed to be substantially parallel. .

  Specifically, three sides of the movable contact spring 22 are formed by punching a metal plate, and a frame portion 25 is formed around the movable contact spring 22. The movable contact spring 22 and the frame portion 25 are connected via a movable-side support portion 24 at a portion corresponding to the remaining one side of the movable contact spring 22 that has not been punched. Thereby, since the movable contact spring 22 is displaced corresponding to the contact between the fixed contact 11 and the movable contact 21, etc., it can function as a spring. Note that the frame portion 25 is not displaced corresponding to the contact between the fixed contact 11 and the movable contact 21, etc., and remains in a predetermined shape, and a movable side protrusion 26 described later is maintained at a predetermined position. ing.

  A movable side arc runner 23 is provided at the end of the frame portion 25 on the side opposite to the movable side support portion 24. The movable-side arc runner 23 includes a connecting portion 23a formed along the direction in which the frame portion 25 extends, a straight portion 23c bent by the bent portion 23b, and an outer side formed by bending the end of the straight portion 23c at the bent portion 23d. It is formed by the portion 23e. The direction in which the straight line portion 23c extends is bent at the bent portion 23b so as to be smaller than the right angle with respect to the direction in which the frame portion 25 extends, and the direction in which the outer portion 23e extends is substantially the same as the direction in which the frame portion 25 extends. It is bent at the bent portion 23d so as to be parallel.

  Further, the bent portions 23b and 23d are provided with a predetermined roundness, and the generated arc can be smoothly run also in the bent portions 23b and 23d. In addition, on the side on which the movable contact 21 that is opposite to the movable arc runner 23 is provided, a movable projection 26 that extends from the frame 24 toward the movable contact 21 is provided.

  In the present embodiment, the angle formed between the straight line portion 23c and the frame portion 25 in the movable arc runner 23 is bent so as to be smaller than the right angle so that the distance from the fixed arc runner 13 is gradually increased. Is formed. Thereby, an arc can be smoothly run in the linear part 23c. In addition, the angle | corner which the linear part 23c and the frame part 25 make means the angle of the linear part 23c bent with respect to the frame part 25, and the state which is not bent is 0 degree. The movable protrusion 26 is bent in the vicinity of the connecting portion between the support 24 and the movable spring 22 so as to be close to the movable contact 21.

  In the present embodiment, the fixed contact portion 10 is fixed to the base 80 at the fixed side support portion 14, and the movable contact portion 20 is fixed to the base 80 at the movable side support portion 24.

  In the present embodiment, each of the fixed contact portion 10 and the movable contact portion 20 is formed by processing one metal plate, so that an electromagnetic relay can be formed at low cost. Further, since there is no connection member or the like that forms a contact resistance between the fixed contact 11 and the fixed arc runner 13 and between the movable contact 21 and the movable arc runner 23, the resistance between them is low, and the fixed contact 11 And the fixed-side arc runner 13 can be made more uniform, and the potentials of the movable contact 21 and the movable-side arc runner 23 can be made more uniform. Thereby, the arc generated between the fixed contact 11 and the movable contact 21 can be more smoothly transferred to the fixed-side arc runner 13 and the movable-side arc runner 23.

  In FIG. 8, the enlarged view of the contact part of the stationary contact 11 and the movable contact 21 in the electromagnetic relay in this Embodiment is shown. The fixed contact 11 is formed so as to be close to the fixed protrusion 16 connected to the fixed arc runner 13, and the movable contact 21 is close to the movable protrusion 26 connected to the movable arc runner 23. It is formed to do.

  Thus, since the fixed contact 11 and the fixed side protrusion 16 are close to each other, and the movable contact 21 and the movable side protrusion 26 are close to each other, the fixed contact 11 and the movable contact 21 are separated from each other. An arc is generated, but due to the magnetic flux generated by the permanent magnet 50, the generated arc is easily transferred from between the fixed contact 11 and the movable contact 21 to between the fixed projection 16 and the movable projection 26. . Thereafter, the arc transferred between the fixed-side protruding portion 16 and the movable-side protruding portion 26 runs through the fixed-side arc runner 13 and the movable-side arc runner 23. As described above, in the present embodiment, the arc generated between the fixed contact 11 and the movable contact 21 can be smoothly transferred to the fixed arc runner 13 and the movable arc runner 23. The damage at 21 can be reduced.

  In the present embodiment, the reliability and the like may be further improved by increasing the heat capacity in the vicinity of the fixed contact 11 and the movable contact 21. Specifically, as shown in FIG. 9, the heat capacity in the fixed contact 11 may be increased by providing a fixed contact auxiliary portion 111 that reinforces the connection portion between the fixed contact spring 12 and the fixed contact 11. At this time, the protrusion side auxiliary part 116 may be provided also on the fixed side protrusion part 16 to which the arc is transferred from the fixed contact 11 to increase the heat capacity in the fixed side protrusion part 16.

  Further, as shown in FIG. 10, the heat capacity in the movable contact 21 may be increased by providing a movable contact auxiliary portion 121 that reinforces the connection portion between the movable contact spring 22 and the movable contact 21. At this time, the protrusion-side auxiliary portion 126 may be provided also on the movable-side protrusion 26 to which the arc is transferred from the movable contact 21 to increase the heat capacity of the movable-side protrusion 26.

  Thereby, it becomes difficult to receive the thermal damage by an arc, and reliability and safety | security can be improved.

(Manufacturing method of electromagnetic relay)
Next, the manufacturing method of the electromagnetic relay in this Embodiment is demonstrated based on FIG.11 and FIG.12. The electromagnetic relay in the present embodiment can be formed by connecting members constituting the electromagnetic relay from one direction (a direction parallel to the Z axis).

  First, in step 102 (S102), the electromagnet unit 30 having the armature 40 connected to the base 80 is installed. The electromagnet part 30 is installed so that a magnetic field can be generated in the Z-axis direction, and the armature 40 is installed so that one side 40a is located on the upper part of the electromagnet part 30.

  Next, in step 104 (S104), the fixed contact portion 10 and the movable contact portion 20 are installed. Specifically, an insulating case 91 having openings on both sides in the Z-axis direction is connected to the base 80 in a direction parallel to the Z-axis, and the fixed contact portion 10 and the movable contact portion 10 are moved to the base 80 where the electromagnet portion 30 is not installed. The contact portion 20 is connected from the direction parallel to the Z axis so that the terminals 81 and 82 are on the base 80 side. At this time, the movable contact portion 20 is installed on the side where the electromagnet portion 30 is provided, and is connected so that the movable-side arc runner 23 in the movable contact portion 20 is located in the upward direction (Z-axis direction) of the electromagnet portion 30. Is done.

  Next, in step 106 (S106), the yoke 60, the insulating part 61, the arc extinguishing grid 70, and the permanent magnet 50 are installed. Specifically, one opening of the case 90 having openings on both sides in the Z-axis direction and the base 80 are connected. At this time, the case 90 is connected to the base 80 in a direction parallel to the Z axis. Thereafter, the yoke 60, the insulating portion 61, the arc extinguishing grid 70, and the permanent magnet 50 are connected in a direction parallel to the Z axis.

  Next, in step 108 (S108), the cover 92 is installed. Specifically, the cover 92 is connected in a direction parallel to the Z axis so as to cover the other opening of the case 90 in the Z axis direction. Thereby, the electromagnetic relay in this Embodiment can be produced.

  In this embodiment, since the components constituting the electromagnetic relay shown in FIG. 11 can be supplied and assembled in order from the bottom, that is, the components constituting the electromagnetic relay can be supplied and assembled from the same direction. The electromagnetic relay can be manufactured with high efficiency and low cost. Note that the base 80, the case 90, the insulating case 91, the cover 92, and the like are formed of a resin material.

(exhaust port)
The base 80, the case 90, and the cover 92 formed in this manner serve as a casing for the electromagnetic relay according to the present embodiment. In the present embodiment, as shown in FIG. 13, when the arc is generated, the pressure in the housing can be prevented from increasing, and the vaporized gas generated by the arc can be discharged. An exhaust port 95 is formed by 90 and the cover 92.

  The exhaust port 95 has a plurality of bent portions in order to prevent entry of dust and the like from the outside. By forming such a bent portion, entry of dust or the like can be prevented as much as possible. Further, a dust storage part 96 is provided in a part of the exhaust port 95, and foreign substances such as dust that have entered the opening 95 from the outside can be stored in the dust storage part 96.

  As mentioned above, although the form which concerns on implementation of this invention was demonstrated, the said content does not limit the content of invention.

DESCRIPTION OF SYMBOLS 10 Fixed contact part 11 Fixed contact 12 Fixed contact spring 13 Fixed side arc runner 14 Fixed side support part 15 Frame part 16 Fixed side protrusion part 20 Movable contact part 21 Movable contact 22 Movable contact spring 23 Movable side arc runner 24 Movable side support part 25 Frame Part 26 movable side protrusion part 30 electromagnet part 40 armature 50 permanent magnet 60 yoke 61 insulating part 70 arc extinguishing grid 80 base 81, 82, 83 terminal 90 case 91 insulating case 92 cover 95 exhaust port

Claims (6)

A fixed contact provided on the fixed contact spring;
A movable contact provided on the movable contact spring;
An electromagnet for applying a force to the movable contact spring via an armature to bring the movable contact into contact with the fixed contact;
A magnet for generating a magnetic field between the fixed contact and the movable contact;
A fixed-side arc runner connected to the fixed contact spring, provided at a position away from the fixed contact spring from a connection portion with the fixed contact spring;
A movable-side arc runner connected to the movable contact spring and provided at a position away from the movable contact spring from a connecting portion with the movable contact spring;
Two yokes made of magnetic material;
Have
A gap is provided between the fixed contact and the fixed-side arc runner,
A gap is provided between the movable contact and the movable arc runner,
The two yokes are installed so as to be parallel to each other so as to sandwich the fixed contact and the movable contact, and a magnetic field generated in the magnet in a region where the fixed contact and the movable contact are provided. Is applied, and
The electromagnetic relay according to claim 1, wherein an insulating portion is provided on each of the surfaces of the yoke on which the fixed contact and the movable contact are provided.   The electromagnetic relay according to claim 1, wherein the insulating portion is plate-shaped or applied to the yoke.   The electromagnetic relay according to claim 1, wherein the insulating portion is formed of an inorganic insulating material or an organic insulating material.   The electromagnetic relay according to any one of claims 1 to 3, wherein an arc extinguishing grid is provided between an end of the fixed arc runner and an end of the movable arc runner.   5. The electromagnetic relay according to claim 4, wherein the fixed-side arc runner, the movable-side arc runner, and the arc extinguishing grid are present in a space between the two insulating portions.   6. The fixed contact and the movable contact, or the fixed contact spring and the movable contact spring are located between the electromagnet and the magnet. Electromagnetic relay.

Images