A relay

Abstract

The application discloses a relay and belongs to the technical field of electrical control. The relay comprises a contact assembly, the contact assembly comprising a static contact and a moving contact which are in contact with each other or away from each other along a first direction; a base, the contact assembly being installed on the base; and a magnetic steel assembly, the magnetic steel assembly being at least partially installed on the base and located on one side of the moving contact and the static contact along a second direction, the first direction being perpendicular to the second direction, the second direction being the direction in which the contact assembly is installed on the base, and the current when the moving contact and the static contact are in contact being in a magnetic field generated by the magnetic steel assembly. In this way, the installation of the magnetic steel assembly is facilitated, and the installation difficulty of the magnetic steel assembly is reduced. As the volume of the magnetic steel assembly is larger, the magnetic field is stronger, and the blowing arc force is larger, the arc is pulled longer and cooled faster, and thus the arc extinguishing capacity of the magnetic steel assembly is improved. Meanwhile, a magnetic steel material with a large volume and a relatively low material cost can be used, so that the preparation cost of the relay as a whole is reduced.

Description

Technical Field

[0001] This application belongs to the field of electrical control technology, and specifically relates to a relay. Background Technology

[0002] In the electrical engineering industry, relays are widely used due to their advantages such as stability, reliability, energy saving, and high load capacity.

[0003] To prevent the high-temperature arc generated when the moving and stationary contacts disconnect from being quickly extinguished, and to protect the moving and stationary contacts from burning or sticking, ensuring circuit safety and relay durability, magnets are usually installed on one side of the moving and stationary contacts and on the side wall of the relay base. The magnetic field generated by the magnets "blows" away, elongates, and quickly extinguishes the arc, thus achieving the effect of arc extinguishing.

[0004] However, because the magnet is mounted on the side wall of the base, it can easily affect the strength of the base's side wall, and the installation space on the base's side wall is limited. Therefore, only small-volume, strong magnets can be installed. The existing structure not only restricts the installation space for the magnet and increases the difficulty of installing the magnet, but also increases the cost of the magnet, thus increasing the overall manufacturing cost of the relay. Summary of the Invention

[0005] The purpose of this application is to provide a relay that at least solves the problem that the limited installation space of the magnet necessitates the use of more expensive magnets, which leads to increased installation difficulty, higher costs, and increased overall manufacturing costs of the relay.

[0006] This application provides a relay, the relay comprising: A contact assembly, the contact assembly comprising stationary contacts and moving contacts that are either in contact with or far apart from each other along a first direction; A base, on which the contact component is mounted; A magnet assembly, at least partially mounted on the base, and the magnet assembly is located on one side of the moving contact and the stationary contact along a second direction, the first direction being perpendicular to the second direction, the second direction being the direction in which the contact assembly is mounted on the base, wherein the current when the moving contact and the stationary contact are in contact with each other is in the magnetic field generated by the magnet assembly.

[0007] In some embodiments, the magnet assembly is at least partially mounted on the end face of the base in the second direction.

[0008] In some embodiments, the magnet assembly includes an insulating housing and a magnet body; The insulating housing is mounted on the base, and the insulating housing includes a mounting cavity in which at least one of the magnet bodies is embedded.

[0009] In some embodiments, the end of the magnet body away from the base protrudes at least partially from the mounting cavity.

[0010] In some embodiments, the relay further includes a cover, which is detachably connected to the base, and the magnet body abuts against the cover.

[0011] In some embodiments, a first snap-fit ​​structure is provided on the end face of the base on which the magnet assembly is mounted, and a second snap-fit ​​structure is provided on both sides of the insulating housing along a third direction. The first snap-fit ​​structure and the second snap-fit ​​structure are snapped together, and the third direction is perpendicular to both the first direction and the second direction.

[0012] In some embodiments, a partition is provided in the mounting cavity, the partition dividing the inner cavity of the insulating housing into at least two mounting cavities, the mounting cavities being configured to mount the magnet body, the magnet body being abutted between the bottom of the mounting cavity and the cover in the second direction.

[0013] In some embodiments, the magnet body is installed in each of at least two of the mounting cavities, or at least one of the mounting cavities is empty while the magnet body is installed in the remaining mounting cavities.

[0014] In some embodiments, a heat dissipation hole is provided on the partition between each pair of adjacent mounting cavities, and the extension direction of the heat dissipation hole is consistent with the second direction.

[0015] In some embodiments, the heat dissipation holes communicate with the space of the insulating housing on the side away from the base in the second direction.

[0016] In some embodiments, each of the mounting cavities has a guide protrusion on its inner wall, and each guide protrusion has a guide slope at its end away from the stationary contact and the moving contact, and the guide slope gradually extends inclinedly in the second direction toward the inner wall of the mounting cavity.

[0017] In some embodiments, the inner wall of each mounting cavity contacts the magnet body via the guide protrusion, and the guide protrusion and the magnet body are interference-fitted.

[0018] In some embodiments, at least one of the at least two mounting cavities is an empty mounting cavity. The distance between the stationary contact and the moving contact corresponding to the empty mounting cavity in the second direction is a first distance. The magnet body is installed in all the other mounting cavities except the empty mounting cavity. The distance between the stationary contact and the moving contact corresponding to the mounting cavity in which the magnet body is installed in the second direction is a second distance. The first distance is greater than the second distance.

[0019] In some embodiments, the number of mounting cavities is at least three. Among the at least three mounting cavities, the magnet body is installed in two of the mounting cavities located at the ends of a third direction in the arrangement direction of the plurality of mounting cavities, and at least one mounting cavity located in the middle is an empty mounting cavity. The third direction is perpendicular to both the first direction and the second direction.

[0020] In some embodiments, the contact assembly includes at least three sets of stationary contacts and moving contacts that are in contact with or far apart from each other along the first direction. The at least three sets of stationary contacts and moving contacts include a first contact group that corresponds to the vacant mounting cavity in the second direction. The stationary contacts and moving contacts in the first contact group are configured to close later and open first.

[0021] In some embodiments, the contact assembly includes at least three sets of stationary contacts and moving contacts that are in contact with or far apart from each other along the first direction, wherein the stationary contact and the moving contact located in the middle of the at least three sets of stationary contacts and moving contacts constitute the first contact group.

[0022] In some embodiments, the magnet assembly includes a plurality of magnet bodies, each magnet body having a magnetic pole direction consistent with the second direction, and each magnet body having the same magnetic pole polarity at the same end in the second direction.

[0023] In some embodiments, a mounting groove is provided on the side wall of the base, and an arc-extinguishing grid structure is installed on the mounting groove. The mounting groove has multiple fitting slots arranged along the first direction on two opposite groove walls in the second direction. The arc-extinguishing grid structure includes multiple arc-extinguishing grid plates spaced apart along the first direction. Each arc-extinguishing grid plate is embedded in a fitting slot at both ends in the second direction. The gap between each two adjacent arc-extinguishing grid plates is configured to separate the arc generated by the moving contact and the stationary contact when they are disconnected. In some embodiments, the magnet assembly includes a plurality of magnet bodies, each magnet body corresponding to a set of stationary contacts and a set of moving contacts in the second direction.

[0024] In some embodiments, the contact assembly includes a movable spring and a stationary spring disposed opposite to each other, the movable contact being disposed on the movable spring, the stationary contact being disposed on the stationary spring, the stationary spring being mounted in the base, and the magnet assembly being located on one side of the stationary spring in the second direction.

[0025] According to the embodiments of this application, since the magnet assembly is located on one side of the moving and stationary contacts along the second direction Z, the current when the moving and stationary contacts are in contact is in the magnetic field generated by the magnet assembly. Therefore, the direction of the current when the stationary and moving contacts are in contact is approximately perpendicular to the magnetic pole direction of the magnet assembly. According to the principle of electromagnetic induction, the arc generated when the stationary and moving contacts are disconnected can be efficiently guided to the magnetic field coverage area of ​​the magnet assembly, so that the arc is rapidly elongated, cooled and extinguished under the action of a strong magnetic field, thereby significantly improving the arc extinguishing performance and electrical life of the relay. Furthermore, since the magnet assembly is at least partially mounted on the base, and the magnet assembly is located on one side of the moving and stationary contacts along the second direction Z, which is the direction in which the contact assembly is mounted on the base, the magnet assembly is located in the unused space between the contact assembly and the bottom wall of the base. This means that the installation space of the magnet assembly is no longer limited by the thickness of the base side wall and the lateral installation position of the contact assembly. This not only greatly facilitates the assembly of the magnet assembly and reduces installation difficulty, but also completely avoids the need to create an installation structure for the magnet assembly on the side wall of the base, thus effectively ensuring the structural strength of the base side wall and eliminating the risk of injection molding deformation and impact cracking. Based on this, with the increased dimension of the magnet assembly in the second direction Z, the arc-blowing magnetic field strength generated by the magnet assembly is enhanced, resulting in greater arc force and superior arc extinguishing effect. In other words, the magnet assembly in this application does not rely on high-coercivity, high-cost, small-volume rare-earth magnets. The magnet assembly can use large-volume, low-cost conventional permanent magnet materials (such as ferrite), increasing the volume to compensate for the magnetic flux, thus significantly reducing the overall manufacturing cost of the relay while ensuring or even improving the arc extinguishing performance. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is an exploded view of a relay provided in an embodiment of this application; Figure 2 This represents an isometric view of a relay provided in an embodiment of this application; Figure 3This is a cross-sectional view of a relay provided in an embodiment of this application; Figure 4 This diagram illustrates a partial installation of a relay according to an embodiment of this application. Figure 5 This application provides a relay in which... Figure 4 A magnified view of a portion of point A; Figure 6 This is a schematic diagram showing the structure of a magnet assembly included in a relay according to an embodiment of this application; Figure 7 This application describes a relay embodiment that includes a magnet assembly in... Figure 6 A magnified view of point B in the diagram.

[0028] Figure label: 1: Contact component; 11: Moving spring; 111: Moving contact; 12: Stationary spring; 121: Stationary contact; 2: Base; 21: Mounting slot; 22: Snap-fit ​​connector; 3: Magnet assembly; 31: Insulating housing; 311: Partition plate; 312: Heat dissipation hole; 313: Guide protrusion; 314: Snap-fit ​​slot; 32: Magnet body; 33: Mounting cavity; 4: Arc extinguishing grid structure; X: First direction; Z: Second direction; Y: Third direction. Detailed Implementation

[0029] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] like Figures 1 to 7 As shown, this application embodiment provides a relay, which includes: Contact component 1 includes a stationary contact 121 and a moving contact 111 that are in contact with or away from each other along a first direction X.

[0033] Base 2, contact component 1 is mounted on base 2.

[0034] The magnet assembly 3 is at least partially mounted on the base, and the magnet assembly 3 is located on one side of the moving contact 111 and the stationary contact 121 along the second direction Z. The first direction X and the second direction Z are perpendicular. The second direction Z is the direction in which the contact assembly 1 is mounted on the base 2. The current when the moving contact 111 and the stationary contact 121 are in contact with each other is in the magnetic field generated by the magnet assembly 3.

[0035] As can be seen from the above embodiments, in this embodiment, since the magnet assembly 3 is located on one side of the moving contact 111 and the stationary contact 121 along the second direction Z, the current when the moving contact 111 and the stationary contact 121 are in contact with each other is in the magnetic field generated by the magnet assembly 3. Therefore, the direction of the current when the stationary contact 121 and the moving contact 111 are in contact with each other is approximately perpendicular to the direction of the magnetic pole of the magnet assembly 3. According to the principle of electromagnetic induction, the arc generated by the stationary contact 121 and the moving contact 111 when they are disconnected can be efficiently guided to the magnetic field coverage area of ​​the magnet assembly 3, so that the arc is quickly elongated, cooled and extinguished under the action of a strong magnetic field, thereby greatly improving the arc extinguishing performance and electrical life of the relay. Furthermore, since the magnet assembly 3 is at least partially mounted on the base, and the magnet assembly 3 is located on one side of the moving contact 111 and the stationary contact 121 along the second direction Z (the direction in which the contact assembly 1 is mounted on the base 2), the magnet assembly 3 is situated in the unused space between the contact assembly 1 and the bottom wall of the base 2. This means that the installation space of the magnet assembly 3 is no longer limited by the thickness of the side wall of the base 2 and the lateral installation position of the contact assembly 1. This not only greatly facilitates the assembly of the magnet assembly 3 and reduces the installation difficulty, but also completely avoids creating an installation structure for the magnet assembly 3 on the side wall of the base 2, thereby effectively ensuring the structural strength of the side wall of the base 2 and eliminating the risk of injection molding deformation and impact cracking. Based on this, with the increased dimension of the magnet assembly 3 in the second direction Z, the arc-blowing magnetic field strength generated by the magnet assembly 3 is correspondingly enhanced, resulting in greater arc force and a better arc-extinguishing effect. In other words, the magnet assembly 3 in this application does not need to rely on small-volume rare-earth magnets with high coercivity and high cost. The magnet assembly 3 can use conventional permanent magnet materials with large volume and low cost (such as ferrite). By increasing the volume to compensate for the magnetic flux, the overall manufacturing cost of the relay is significantly reduced while ensuring or even improving the arc extinguishing performance.

[0036] In this embodiment, the magnet assembly 3 can be an integrated magnet structure or a split magnet structure. The material of the magnet body 32 that generates the magnetic field in the magnet assembly 3 can be any of the magnetic materials such as ferrite, ceramic, or AlNiCo. This embodiment does not limit this. It should be noted that, taking the material of the magnet body 32 that generates the magnetic field in the magnet assembly 3 as ferrite as an example: Compared with the neodymium iron boron in the prior art, the magnetic field strength generated by neodymium iron boron is 3 to 4 times that generated by ferrite under the same volume. If the same arc blowing effect is required, according to Lorentz force, the volume of ferrite needs to be 3 to 5 times larger than that of neodymium iron boron. At the same time, the cost of ferrite is 5 to 8 times lower than that of neodymium iron boron, thereby reducing the cost of the magnet assembly 3. The magnet assembly 3 is located on the side of the moving contact 111 and the stationary contact 121 away from the bottom of the base 2. It can be understood that the magnet assembly 3 is located on the side of the base 2 away from the bottom of the base 2. Figures 2 to 4On the end face of the second direction Z, the second direction is the same as the magnetic pole direction of the magnet assembly 3.

[0037] It should also be noted that in the embodiments of this application, the X-axis direction intersects the Z-axis direction, the X-axis direction intersects the Y-axis direction, and the Y-axis direction intersects the Z-axis direction. For ease of explanation, the first direction X is defined as follows: Figures 2 to 4 In the X-axis direction, the second direction Z is defined as follows: Figures 2 to 4 In the Z-axis direction, the third direction Y is defined as follows: Figures 2 to 4 The Y-axis direction is specified in the text. It should be further clarified that the definition of intersection in the specification, fluctuating by 10% within 90 degrees, should be understood as perpendicular. Specifically, the angle between the defined first direction X and the second direction Z, and the angle between the defined first direction X and the third direction Y, should be understood as intersecting within 80 to 90 degrees. In some embodiments, the X-axis and Y-axis directions are preferably perpendicular, the Y-axis and Z-axis directions are preferably perpendicular, and the X-axis and Z-axis directions are preferably perpendicular.

[0038] In some embodiments, the contact assembly 1 includes a movable spring 11 and a stationary spring 12 disposed opposite to each other. A movable contact 111 is disposed on the movable spring 11, and a stationary contact 121 is disposed on the stationary spring 12. The stationary spring 12 is mounted in the base 2, and the magnet assembly 3 is located on one side of the stationary spring 12 in the second direction Z.

[0039] In this embodiment, the movable spring 11 can be a plate-like structure, a rod-like structure, or other structures; this application does not limit this. The movable spring 11 can include a swing end and a fixed end, which are two opposite ends of the movable spring 11 in the extending direction. The fixed end is used to be fixedly connected to the movable spring lead-out piece, and the swing end is used to move closer to or further away from the stationary contact 121, thereby causing the movable contact 111 and the stationary contact 121 to contact and separate. It should be noted that when the movable spring 11 is driven to the closed position, the directions in which the movable contact 111 and the stationary contact 121 contact or move away from each other are as follows: Figures 2 to 4As shown in the first direction X, the moving contact 111 and the stationary contact 121 are in contact with each other along the first direction X. This can be understood as the moving spring 11 being driven along the first direction X to the position where the moving contact 111 and the stationary contact 121 are closed. The moving contact 111 and the stationary contact 121 are moving away from each other along the first direction X. This can be understood as the moving spring 11 being driven along the first direction X to the position where the moving contact 111 and the stationary contact 121 are disconnected. Before the moving contact 111 and the stationary contact 121 are disconnected, the moving contact 111 and the stationary contact 121 are conductive, and there is a working voltage at both ends of the moving contact 111 and the stationary contact 121. Once the moving contact 111 and the stationary contact 121 begin to separate, the above working voltage is still applied in the extremely small gap. When the moving contact 111 and the stationary contact 121 just separate, the distance is very small and the electric field strength is extremely high, which ionizes the molecules in the air. The air changes from an insulator to a conductor, and the current continues to flow in the form of an electric arc. In the circuit controlled by the relay, the inductor stores magnetic field energy. When the current is suddenly cut off, the inductor will generate a very high reverse induced electromotive force, which further increases the voltage between the contacts, thereby generating an electric arc. Therefore, it is necessary to extinguish the arc through the magnet assembly 3. Furthermore, in one exemplary embodiment, the movable spring 11 includes a first fixing portion and an elastic sheet, and the stationary spring 12 includes a second fixing portion, wherein the first fixing portion of the movable spring 11 serves as the lead-out end of the movable spring 11, and the second fixing portion of the stationary spring 12 serves as the lead-out end of the stationary spring 12. The second fixing portion within the stationary spring 12 is located on the side of the first fixing portion facing away from the armature assembly in the second direction X and is spaced apart from the first fixing portion. A stationary contact 121 is provided on the second fixing portion. One end of the elastic sheet is fixed to the first fixing portion, and the other end is bent between the first fixing portion and the second fixing portion, and the elastic sheet is provided with a movable contact 111, which faces the second fixing portion and is used to contact or disengage from the stationary contact 121 provided on the side of the second fixing portion facing the first fixing portion.

[0040] In some embodiments, the magnet assembly 3 is at least partially mounted on the end face of the base 2 in the second direction Z.

[0041] In this embodiment, since the magnet assembly 3 is at least partially installed on the end face of the base 2 in the second direction Z, the magnet assembly 3 is installed outside the installation space enclosed by the base 2. That is, the installation of the magnet assembly 3 is not limited by the installation space inside the base 2, and the installation space of the magnet assembly 3 is not limited by the installation positions of the base 2 and the contact assembly 1. This not only facilitates the installation of the magnet assembly 3 and reduces the installation difficulty of the magnet assembly, but also ensures that the installation process does not affect the strength of the base sidewall.

[0042] Regarding the structure of the magnet assembly 3, in some embodiments, the magnet assembly 3 includes an insulating housing 31 and a magnet body 32. The insulating housing 31 is mounted on the base 2 and includes a mounting cavity 33. At least one magnet body 32 is embedded in the mounting cavity 33.

[0043] In this embodiment, since the magnet assembly 3 includes an insulating shell 31 and a magnet body 32, the insulating shell 31 is mounted on the base 2 and includes a mounting cavity 33. At least one magnet body 32 is embedded in the mounting cavity 33. Therefore, on the one hand, the insulating shell 31 can provide a carrier for the magnet body 32, which facilitates the installation and fixation of the magnet body 32. On the other hand, the insulating shell 31 avoids the formation of a conductive circuit between the magnet body 32 and the contacts, coils and magnet body 32 inside the relay, thus avoiding short circuits, leakage and stray current. At the same time, the insulating shell 31 can isolate moisture, oil and dust, and extend the overall life of the magnet assembly 3.

[0044] It should be noted that the installation method between the insulating shell 31 and the base 2 may include adhesive bonding, injection molding, slot connection, hot melt fixing, spring sheet clamping, etc., and this application embodiment does not limit this method. The insulating shell 31 includes one or more mounting cavities 33, and the number of magnet bodies 32 may be one or more. The number of magnet bodies 32 and the number of mounting cavities 33 may be equal or unequal, and this application embodiment does not limit this method.

[0045] In some embodiments, the end of the magnet body 32 away from the base 2 protrudes at least partially from the mounting cavity 33.

[0046] In this embodiment, since the end of the magnet body 32 away from the base 2 protrudes at least partially into the mounting cavity 33, not only is the volume of the magnet body 32 maximized, but the part of the magnet body 32 protruding into the mounting cavity 33 can also be connected to other structures of the relay to improve the overall stability of the magnet body 32.

[0047] In some embodiments, the relay further includes a cover, the cover and the base 2 are detachably connected, and the magnet body 32 abuts against the cover.

[0048] In this embodiment, since the cover and the base 2 are detachably connected and the magnet body 32 abuts against the cover, the magnet body 32 can be limited in the second direction Z by the connection between the cover and the end of the magnet body 32 away from the base 2.

[0049] In some embodiments, a first snap-fit ​​structure 22 is provided on the end face of the base 2 where the magnet assembly 3 is mounted, and a second snap-fit ​​structure 314 is provided on both sides of the insulating housing 31 along the third direction Y. The first snap-fit ​​structure 22 snaps into the second snap-fit ​​structure 314, and the third direction Y is perpendicular to both the first direction X and the second direction Z.

[0050] In this embodiment, a first snap-fit ​​structure 22 is provided on the end face of the magnet assembly 3 mounted on the base 2, and a second snap-fit ​​structure 314 is provided on both sides of the insulating housing 31 along the third direction Y. The first snap-fit ​​structure 22 snaps into the second snap-fit ​​structure 314, so that the insulating housing 31 can be limited in the third direction Y through the snap-fit ​​between the second snap-fit ​​structure 314 and the first snap-fit ​​structure 22. In addition, the connection between the cover and the magnet body 32 at the end away from the base 2 in the previous embodiment limits the magnet body 32 in the second direction Z. Thus, the magnet assembly 3 can be limited in at least two directions, which improves the stability of the magnet assembly 3, simplifies the installation difficulty of the magnet assembly 3, and improves the overall assembly efficiency of the relay.

[0051] It should be noted that the first snap-fit ​​structure 22 and the second snap-fit ​​structure 314 can be any form of snap-fit ​​structure, such as an axial snap-fit ​​structure, a lateral snap-fit ​​structure, a rotational snap-fit ​​structure, a sliding snap-fit ​​structure, or a flipping snap-fit ​​structure. This application embodiment does not limit this type of snap-fit ​​structure. For example, the first snap-fit ​​structure 22 and the second snap-fit ​​structure 314 can be axial snap-fit ​​structures. For instance, the first snap-fit ​​structure 22 can be a snap-fit ​​connector, and the second snap-fit ​​structure can be a snap-fit ​​groove; or, the first snap-fit ​​structure 22 can be a snap-fit ​​groove, and the second snap-fit ​​structure can be a snap-fit ​​connector.

[0052] In some embodiments, a partition 311 is provided in the mounting cavity 33 of the insulating housing 31, the partition 311 dividing the inner cavity of the insulating housing 31 into at least two mounting cavities 33, the mounting cavity being configured to mount a magnet body 32, the magnet body 32 being abutted between the cavity bottom and the cover of the mounting cavity 33 in the second direction Z.

[0053] In this embodiment, since the partition 311 divides the inner cavity of the insulating housing 31 into at least two mounting cavities 33, the mounting cavities are configured to mount the magnet bodies 32. The magnet bodies 32 are abutted between the bottom of the mounting cavity 33 and the cover in the second direction Z. Therefore, the position of the magnet bodies 32 in the second direction Z is always fixed between the bottom of the mounting cavity 33 and the cover, ensuring that the magnet bodies 32 will not be displaced in the second direction Z. Moreover, the mounting cavities 33 can isolate two adjacent magnet bodies 32 to avoid crosstalk between the magnet bodies 32.

[0054] In some embodiments, each of the at least two mounting cavities 33 is fitted with a magnet body 32, or one of the at least two mounting cavities 33 is left unoccupied while the remaining mounting cavities 33 are fitted with magnet bodies 32.

[0055] In this embodiment, since a partition 311 is provided in the mounting cavity 33 of the insulating housing 31, dividing the inner cavity of the insulating housing 31 into at least two mounting cavities 33, adjacent magnet bodies 32 can be separated by the partition 311, preventing the magnet bodies 32 from canceling each other out and causing arc extinguishing failure, while avoiding magnetic short circuits and overall demagnetization. Furthermore, with the partition 311 dividing the inner cavity of the insulating housing 31 into at least two mounting cavities 33, the number of magnet bodies 32 can be rationally arranged based on the desired arc-extinguishing effect for the overall magnet assembly 3, thereby reducing costs.

[0056] In some embodiments, such as Figure 6 and Figure 7 As shown, a heat dissipation hole 312 is provided on the partition plate 311 between each two adjacent mounting cavities 33, and the extension direction of the heat dissipation hole 312 is consistent with the second direction Z.

[0057] In this embodiment, since heat dissipation holes 312 are provided on the partition 311 between each two adjacent mounting cavities 33, and the extension direction of the heat dissipation holes 312 is consistent with the second direction Z, the heat generated by the magnet body 32 installed in the two adjacent mounting cavities 33 can be conducted in time through the heat dissipation holes 312 to avoid local heat concentration of the magnet body 32, which would cause the magnet body 32 to demagnetize and ensure the service life of the magnet body 32.

[0058] In some embodiments, the heat dissipation hole 321 connects to the space of the insulating housing 31 on the side away from the base 2 in the second direction Z.

[0059] In this embodiment, since the heat dissipation hole 321 connects to the space of the insulating shell 31 on the side away from the base 2 in the second direction Z, the space inside and outside the insulating shell 31 can be connected through the heat dissipation hole 321, so that the heat generated by the magnet body 32 can be exchanged with the space of the insulating shell 31 on the side away from the base 2 in the second direction Z in a timely manner. In this way, the space above the insulating shell 31 can be fully utilized, and air circulation can be formed by connecting with the heat dissipation hole 321, which helps to cool down and extinguish the arc.

[0060] In some embodiments, each mounting cavity 33 has a guide protrusion 313 on its inner wall. Each guide protrusion 313 has a guide slope at its end away from the stationary contact 121 and the moving contact 111, and the guide slope gradually extends inclinedly in the direction away from the inner wall of the mounting cavity 33 along the second direction Z.

[0061] In this embodiment, since each mounting cavity 33 has a guide protrusion 313 on its inner wall, and each guide protrusion 313 has a guide slope at its end away from the stationary contact 121 and the moving contact 111, and the guide slope gradually extends in a direction away from the inner wall of the mounting cavity 33 along the second direction Z, when installing the magnet body 32 in each mounting cavity 33, it can be gradually installed into the mounting cavity 33 under the guidance of the guide slope of the guide protrusion 313. This not only facilitates the installation of the magnet body 32, but also, during the process of installing the magnet body 32 into the mounting cavity 33, based on the gradual extension of the guide slope in a direction away from the inner wall of the mounting cavity 33 along the second direction Z, the gap between the magnet body 32 and the guide slope becomes smaller and smaller until the magnet body 32 is abutted and limited by the guide slope of the guide protrusion 313, so that the installation position of the magnet body 32 remains unchanged, avoiding displacement of the magnet body 32 and affecting the arc extinguishing effect, and ensuring the stability of the relay arc extinguishing.

[0062] In some embodiments, the inner wall of each mounting cavity 33 contacts the magnet body 32 via a guide protrusion 313, and the guide protrusion 313 and the magnet body 32 are interference-fitted.

[0063] In this embodiment, under the action of the guide protrusion 313, the guide protrusion 313 and the magnet body 32 are interference-fitted. The guide slope of the guide protrusion 313 contacts the magnet body, reducing the contact area between the inner wall of the mounting cavity 33 and the magnet body 32, thereby reducing chipping.

[0064] In some embodiments, at least one of the at least two mounting cavities 33 includes an empty mounting cavity. The distance between the stationary contact 121 and the moving contact 111 corresponding to the empty mounting cavity in the second direction Z is a first distance. Magnet bodies 32 are installed in all the other mounting cavities 33 except the empty mounting cavity. The distance between the stationary contact 121 and the moving contact 111 corresponding to the mounting cavity 33 with the magnet body 32 installed in the second direction Z is a second distance. The first distance is greater than the second distance.

[0065] In this embodiment, since the distance between the stationary contact 121 and the moving contact 111 corresponding to the empty mounting cavity in the second direction Z is the first distance, and the other mounting cavities 33 except the empty mounting cavity are all equipped with magnet bodies 32, and the distance between the stationary contact 121 and the moving contact 111 corresponding to the mounting cavity 33 with the magnet body 32 in the second direction Z is the second distance, the first distance is greater than the second distance. Since the electric arc generated by the contact group with a larger gap is small or does not generate an electric arc, there is no need to set the magnet body 32. Therefore, the mounting cavity corresponding to the contact group with a larger gap is left empty, while the magnet body only corresponds to the contact group with a smaller gap. Therefore, the utilization rate of the magnet body 32 can be maximized. While ensuring the arc extinguishing effect of the magnet body 32, the manufacturing cost of the magnet assembly 3 can be further reduced.

[0066] In some embodiments, the number of mounting cavities 33 is at least three. Among the at least three mounting cavities 33, in the arrangement direction of the plurality of mounting cavities 33, the magnet body 32 is installed in two mounting cavities 33 located at the ends of the third direction Y, and at least one mounting cavity 33 located in the middle is an empty mounting cavity. The third direction Y is perpendicular to the first direction X and the second direction Z.

[0067] In this embodiment, since there are at least three mounting cavities 33, in the arrangement direction of the plurality of mounting cavities 33, the two mounting cavities 33 located at the ends in the third direction Y are equipped with magnet bodies 32, and at least one mounting cavity 33 located in the middle is an empty mounting cavity. Therefore, the number of magnet bodies 32 in the mounting cavity 33 located in the middle is reduced. Based on the contact assembly 1 with at least three sets of moving contacts 111 and stationary contacts 121, the gap between the stationary contact 121 located in the middle and the corresponding moving contact 111 is greater than the gap between the stationary contact 121 located at the end and the corresponding moving contact 111. Therefore, the probability of arcing between the stationary contact 121 located at the end and the corresponding moving contact 111 is greater than the probability of arcing between the stationary contact 121 located in the middle and the corresponding moving contact 111. Based on this, by reducing the number of magnet bodies 32 in the middle mounting cavity 33, and ensuring that magnet bodies 32 are installed in the two end mounting cavities 33 in the arrangement direction of the multiple mounting cavities 33, the positions of the magnet bodies 32 and the stationary contacts 121 and their corresponding moving contacts 111, which are prone to arcing, can be aligned while reducing costs, thus further ensuring the arc extinguishing effect. Simultaneously, the gap between the middle stationary contact 121 and its corresponding moving contact 111, and the gap between the end stationary contact 121 and its corresponding moving contact 111, can be controlled so that the arc is generated between the end stationary contact 121 and its corresponding moving contact 111, protecting the middle stationary contact 121 and its corresponding moving contact 111, thereby extending the relay's service life.

[0068] It should also be noted that, in addition to the above embodiments, under the premise of ensuring the overall arc extinguishing effect of the relay, if the magnet body 32 is a single magnet structure, the volume of the magnet body 32 can be reduced, and the volume of a single magnet body 32 can be reduced while reducing the number of magnets, thus achieving the same effect of reducing costs. This application embodiment does not limit this.

[0069] In some embodiments, the contact assembly 1 includes at least three sets of stationary contacts 121 and moving contacts 111 that are in contact with or far apart from each other along a first direction X. The at least three sets of stationary contacts 121 and moving contacts 111 include a first contact group that corresponds to an empty mounting cavity in a second direction (Z). The stationary contacts 121 and moving contacts 111 in the first contact group are configured to close later and open first.

[0070] In this embodiment, the probability of arcing generated by the stationary contact 121 and the moving contact 111, which are configured to close later and open first, is low. Therefore, the first contact group corresponds to the empty mounting cavity in the second direction (Z), so that the mounting cavity 33 corresponding to the first contact group in the second direction Z is in an empty state. The configuration of the stationary contact 121 and the moving contact 111 in the first contact group as a contact form that closes later and opens first can make the position of the magnet body 32 correspond to the position of the stationary contact 121 and the corresponding moving contact 111 that are prone to arcing, further ensuring the arc extinguishing effect, and at the same time reducing the manufacturing cost of the magnet assembly 3.

[0071] In some embodiments, the contact component 1 includes at least three sets of stationary contacts 121 and moving contacts 111 that are in contact with or far apart from each other along a first direction X, wherein the stationary contact 121 and moving contact 111 located in the middle of the at least three sets of stationary contacts 121 and moving contacts 111 constitute the first contact group.

[0072] In this embodiment, since the contact assembly 1 includes at least three sets of stationary contacts 121 and moving contacts 111 that are in contact with or far apart from each other along the first direction X, and the stationary contacts 121 and moving contacts 111 located in the middle of the at least three sets of stationary contacts 121 and moving contacts 111 are the first contact group, in the contact assembly 1 based on the at least three sets of moving contacts 111 and stationary contacts 121, the gap between the stationary contact 121 located in the middle and the corresponding moving contact 111 is greater than the gap between the stationary contact 121 located at the end and the corresponding moving contact 111. Therefore, the probability of arcing between the stationary contact 121 located at the end and the corresponding moving contact 111 is greater than the probability of arcing between the stationary contact 121 located in the middle and the corresponding moving contact 111. Based on this, the stationary contact 121 and the moving contact 111 located in the middle of at least three sets of stationary contacts 121 and moving contacts 111 are set as the first contact group. Meanwhile, the magnet body 32 is installed in the two mounting cavities 33 located at the ends in the arrangement direction of the multiple mounting cavities 33. This allows the magnet body 32 to correspond to the positions of the stationary contact 121 and the corresponding moving contact 111 that are prone to arcing while reducing costs, thereby further ensuring the arc extinguishing effect.

[0073] In some embodiments, the magnet assembly 3 includes a plurality of magnet bodies 32, each magnet body 32 having the same magnetic pole direction as the second direction Z, and each magnet body 32 having the same magnetic pole polarity at the same end in the second direction Z.

[0074] In this embodiment, since the magnetic pole direction of each magnet body 32 is consistent with the second direction Z, and the magnetic pole polarity of the same end of each magnet body 32 in the second direction Z is the same, it can be ensured that the magnetic pole direction of the magnet body 32 installed in each mounting cavity 33 always intersects with the direction of the current generated when the moving contact 111 and the stationary contact 121 are disconnected. Based on the left-hand rule (F=BIL), it is further ensured that the direction of the force exerted by the magnetic field generated by the magnet body 32 on the current always intersects with the direction of the current, thereby ensuring the arc extinguishing effect. At the same time, it can avoid electromagnetic interference caused by two adjacent magnet bodies 32 having different magnetic pole directions. It should be noted that the magnetic pole direction of each magnet body 32 along the second direction Z near the stationary contact 121 and the moving contact 111 can be either the NS direction or the SN direction. This embodiment of the application does not limit this.

[0075] In some embodiments, such as Figure 2 and Figure 4As shown, a mounting groove 21 is provided on the side wall of the base 2, and an arc extinguishing grid structure 4 is installed on the mounting groove 21. Multiple embedding grooves arranged along the first direction X are provided on the two opposite groove walls of the mounting groove 21 in the second direction Z. The arc extinguishing grid structure 4 includes multiple arc extinguishing grid plates spaced apart along the first direction X. Each arc extinguishing grid plate is embedded in an embedding groove at both ends in the second direction Z. The gap between each two adjacent arc extinguishing grid plates is configured to separate the arc generated by the moving contact 111 and the stationary contact 121 when they are disconnected.

[0076] In this embodiment, since the mounting groove 21 is provided on the side wall of the base 2, and the arc extinguishing grid structure 4 is installed on the mounting groove 21, and multiple fitting slots arranged along the first direction X are provided on the two opposite groove walls of the mounting groove 21 in the second direction Z, the arc extinguishing grid structure 4 includes multiple arc extinguishing grid pieces spaced apart along the first direction X, and each arc extinguishing grid piece is embedded in a fitting slot at both ends in the second direction Z. Therefore, the mounting groove 2 provided on the side wall of the base 2 can provide sufficient installation space for the arc extinguishing grid structure 4, and facilitate the limiting and fixing of the arc extinguishing grid structure 4, so that the arc extinguishing grid structure 4 maintains positional stability. Furthermore, since the gap between each pair of adjacent arc-extinguishing grid plates is configured to separate the arc generated when the moving contact 111 and the stationary contact 121 are disconnected, the arc generated when the moving contact 111 and the stationary contact 121 are disconnected is divided into a series of short arcs by the metal grid plates included in the arc-extinguishing grid structure 4 after entering the arc-extinguishing grid structure 4. The metal grid plates included in the arc-extinguishing grid structure 4 guide the arc to move upward, making the arc longer and guiding it into the arc-extinguishing space generated by the magnetic field of the magnet assembly 3, reducing the resistance and voltage of the arc, and thus achieving the specified arc-blowing effect by controlling the direction of the magnetic field of the magnet, thereby improving the overall arc-extinguishing effect of the relay.

[0077] It should be noted that the installation method of the arc extinguishing grid structure 4 in the mounting groove 21 may include any of the following methods: slot embedding, snap-fit, hot riveting, integral injection molding, bolt connection, etc. This application embodiment does not limit this method.

[0078] In some embodiments, the magnet assembly 3 includes a plurality of magnet bodies 32, each magnet body 32 corresponding to a set of stationary contacts 121 and moving contacts 111 in the second direction Z.

[0079] In this embodiment, since each magnet body 32 corresponds to a set of stationary contacts 121 and moving contacts 111 in the second direction Z, each magnet body 32 can correspond to the stationary contacts 121 and moving contacts 111, ensuring that the arc generated when the moving contacts 111 and the stationary contacts 121 are disconnected can be guided to the arc extinguishing space generated by the magnetic field of the magnet assembly 3, so as to achieve the effect of rapid arc extinguishing.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0081] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the scope and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A relay, characterized in that, The relay includes: Contact assembly (1), the contact assembly (1) includes a stationary contact (121) and a moving contact (111) that are in contact with or away from each other along a first direction (X). The base (2) is on which the contact component (1) is mounted; A magnet assembly (3) is at least partially mounted on the base (2), and the magnet assembly (3) is located on one side of the moving contact (111) and the stationary contact (121) along a second direction (Z). The first direction (X) is perpendicular to the second direction (Z), and the second direction (Z) is the direction in which the contact assembly (1) is mounted on the base (2). The current when the moving contact (111) and the stationary contact (121) are in contact with each other is in the magnetic field generated by the magnet assembly (3).

2. The relay according to claim 1, characterized in that, The magnet assembly (3) is at least partially mounted on the end face of the base (2) in the second direction (Z).

3. The relay according to claim 1, characterized in that, The magnet assembly (3) includes an insulating shell (31) and a magnet body (32). The insulating housing (31) is mounted on the base (2), and the insulating housing (31) includes a mounting cavity (33), in which at least one of the magnet bodies (32) is embedded.

4. The relay according to claim 3, characterized in that, The end of the magnet body (32) away from the base (2) protrudes at least partially from the mounting cavity (33).

5. The relay according to claim 3, characterized in that, The relay also includes a cover, which is detachably connected to the base (2), and the magnet body (32) abuts against the cover.

6. The relay according to claim 3, characterized in that, The base (2) is provided with a first snap-fit ​​structure (22), and the insulating shell (31) is provided with a second snap-fit ​​structure (314) on both sides along the third direction (Y). The first snap-fit ​​structure (22) and the second snap-fit ​​structure (314) are snap-fitted together, and the third direction (Y) is perpendicular to both the first direction (X) and the second direction (Z).

7. The relay according to claim 3, characterized in that, A partition (311) is provided in the mounting cavity (33) of the insulating housing (31), the partition (311) dividing the inner cavity of the insulating housing (31) into at least two mounting cavities (33), the mounting cavities being configured to mount the magnet body (32), the magnet body (32) being abutted between the bottom of the mounting cavity (33) and the cover in the second direction (Z).

8. The relay according to claim 7, characterized in that, The magnet body (32) is installed in each of at least two of the mounting cavities (33), or at least one of the mounting cavities (33) is empty, and the magnet body (32) is installed in the remaining mounting cavities (33).

9. The relay according to claim 8, characterized in that, A heat dissipation hole (312) is provided on the partition (311) between each two adjacent mounting cavities (33), and the extension direction of the heat dissipation hole (312) is consistent with the second direction (Z).

10. The relay according to claim 9, characterized in that, The heat dissipation hole (321) connects to the space of the insulating housing (31) on the side away from the base (2) in the second direction (Z).

11. The relay according to claim 8, characterized in that, Each of the mounting cavities (33) has a guide protrusion (313) on its inner wall. Each guide protrusion (313) has a guide slope at its end away from the stationary contact (121) and the moving contact (111), and the guide slope extends gradually inclined along the second direction (Z) toward the direction away from the inner wall of the mounting cavity (33).

12. The relay according to claim 11, characterized in that, The inner wall of each of the mounting cavities (33) contacts the magnet body (32) through the guide protrusion (313), and the guide protrusion (313) and the magnet body (32) are in an interference fit.

13. The relay according to claim 8, characterized in that, At least one of the at least two mounting cavities (33) includes an empty mounting cavity. The distance between the stationary contact (121) and the moving contact (111) in the second direction (Z) of the empty mounting cavity is a first distance. The magnet body (32) is installed in all the other mounting cavities (33) except the empty mounting cavity. The distance between the stationary contact (121) and the moving contact (111) in the second direction (Z) of the mounting cavity (33) where the magnet body (32) is installed is a second distance. The first distance is greater than the second distance.

14. The relay according to claim 13, characterized in that, The number of mounting cavities (33) is at least three. Among the at least three mounting cavities (33), the magnet body (32) is installed in two of the mounting cavities (33) located at the ends of the third direction (Y) in the arrangement direction of the plurality of mounting cavities (33), and at least one mounting cavity (33) located in the middle is the empty mounting cavity. The third direction (Y) is perpendicular to both the first direction (X) and the second direction (Z).

15. The relay according to claim 13, characterized in that, The contact assembly (1) includes at least three sets of stationary contacts (121) and moving contacts (111) that are in contact with or far apart from each other along the first direction (X). Among the at least three sets of stationary contacts (121) and moving contacts (111), there is a first contact group that corresponds to the empty mounting cavity in the second direction (Z). The stationary contacts (121) and moving contacts (111) in the first contact group are configured to close later and open first.

16. The relay according to claim 15, characterized in that, The contact assembly (1) includes at least three sets of stationary contacts (121) and moving contacts (111) that are in contact with or far apart from each other along the first direction (X), and the stationary contact (121) and moving contact (111) located in the middle of the at least three sets of stationary contacts (121) and moving contacts (111) are the first contact group.

17. The relay according to claim 1, characterized in that, The magnet assembly (3) includes a plurality of magnet bodies (32), the magnetic pole direction of each magnet body (32) is consistent with the second direction (Z), and the magnetic pole polarity of the same end of each magnet body (32) in the second direction (Z) is the same.

18. The relay according to claim 1, characterized in that, The base (2) has a mounting groove (21) on its side wall. An arc-extinguishing grid structure (4) is installed on the mounting groove (21). The mounting groove (21) has multiple insert slots arranged along the first direction (X) on two opposite groove walls in the second direction (Z). The arc-extinguishing grid structure (4) includes multiple arc-extinguishing grid plates spaced apart along the first direction (X). Each arc-extinguishing grid plate is embedded in one of the insert slots at both ends in the second direction (Z). The gap between each two adjacent arc-extinguishing grid plates is configured to separate the arc generated when the moving contact (111) and the stationary contact (121) are disconnected.

19. The relay according to claim 1, characterized in that, The magnet assembly (3) includes a plurality of magnet bodies (32), each magnet body (32) corresponding to a set of stationary contacts (121) and moving contacts (111) in the second direction (Z).

20. The relay according to claim 1, characterized in that, The contact assembly (1) includes a moving spring (11) and a stationary spring (12) arranged opposite to each other. The moving contact (111) is disposed on the moving spring (11), and the stationary contact (121) is disposed on the stationary spring (12). The stationary spring (12) is installed in the base (2), and the magnet assembly (3) is located on the side of the stationary spring (12) in the second direction (Z).

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