Relay

Abstract

The utility model discloses a relay which comprises a contact part and an arc blowing assembly. The contact part comprises two contact assemblies, and each contact assembly comprises two static contacts and a movable contact piece used for making contact with or being separated from the static contacts. The arrangement direction of the two static contacts of the contact assembly is defined as a first direction, the movement direction of the movable contact piece is defined as a second direction, the first direction is perpendicular to the second direction, and the direction perpendicular to the first direction and the second direction is defined as a third direction; the plurality of contact assemblies are arranged along a third direction; the arc blowing assembly comprises four permanent magnets, and the four permanent magnets are located on the two sides of the contact part in the first direction respectively and correspond to the four static contacts in position respectively. Wherein the magnetic poles of the surfaces, facing each other, of the two permanent magnets corresponding to the same contact assembly are opposite, and in the third direction, the magnetic poles of the surfaces, facing the corresponding static contacts, of the two adjacent permanent magnets are opposite.

Description

Technical Field

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

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] A relay includes a moving contact and two stationary contacts. The moving contact is used to make contact with or separate from the stationary contacts to achieve the opening and closing of the relay. In related technologies, to ensure timely disconnection between the moving contact and the stationary contacts, an arc-extinguishing assembly is usually placed around the moving contact and the stationary contacts. However, when the relay switches from connecting positive current to connecting negative current, and vice versa, the arc-extinguishing directions will always interfere with each other under one of the connection conditions. This is not conducive to arc extinguishing, and thus leads to untimely disconnection between the moving contact and the stationary contacts. Utility Model Content

[0004] This application provides a relay to solve the problem in related technologies where the arc-extinguishing direction interferes with each other due to the switching direction of the current, which is detrimental to arc extinguishing.

[0005] The relay in this application embodiment includes:

[0006] The contact portion includes two contact components, each comprising two stationary contacts and a movable contact piece for contacting or separating from the stationary contacts; the arrangement direction of the two stationary contacts of the contact components is defined as a first direction, and the movement direction of the movable contact piece is defined as a second direction; the first direction is perpendicular to the second direction, and a direction perpendicular to both the first and second directions is defined as a third direction; a plurality of contact components are arranged along the third direction;

[0007] The arc blowing assembly includes four permanent magnets, which are respectively located on both sides of the contact portion along the first direction and correspond to the positions of the four stationary contacts.

[0008] In this configuration, the magnetic poles of the surfaces of two permanent magnets corresponding to the same contact assembly that face each other are opposite, and in the third direction, the magnetic poles of the surfaces of two adjacent permanent magnets facing their respective stationary contacts are opposite.

[0009] According to some embodiments of this application, the relay further includes an insulating cover, the stationary contact is mounted on the insulating cover, and the moving contact is movably disposed inside the insulating cover;

[0010] The permanent magnet is arranged on the outer wall surface of the insulating cover.

[0011] According to some embodiments of this application, the arc blowing assembly further includes a yoke clamp arranged on the outer periphery of the insulating cover, and the permanent magnet is mounted on the side surface of the yoke clamp facing the insulating cover.

[0012] According to some embodiments of this application, the yoke clamp includes two pairs of sub-yokes, wherein one pair of sub-yokes is symmetrically arranged on both sides of one of the contact components along the first direction, and the other pair of sub-yokes is symmetrically arranged on both sides of the other contact component along the first direction; four permanent magnets are respectively mounted on the side surface of the four sub-yokes facing the insulating cover.

[0013] According to some embodiments of this application, the sub-yoke includes a first portion and a second portion that are perpendicular to each other;

[0014] The two sub-yokes arranged symmetrically in the first direction have their first portions facing each other on their surfaces provided with permanent magnets, and the second portions of the two sub-yokes extend from their respective corresponding first portions along the first direction toward a direction that approaches each other.

[0015] According to some embodiments of this application, the arc blowing assembly further includes an intermediate yoke, and the intermediate yoke is provided between adjacent stationary contacts in adjacent contact assemblies.

[0016] According to some embodiments of this application, the insulating cover is further provided with an isolation seat, the isolation seat has an isolation structure, the isolation structure is provided between adjacent contact components, and the intermediate yoke is installed in the isolation structure.

[0017] According to some embodiments of this application, the isolation structure has two isolation walls spaced apart along the third direction, and the intermediate yoke is disposed between the two isolation walls.

[0018] According to some embodiments of this application, the isolation wall has two sub-walls arranged at intervals along the first direction;

[0019] The intermediate yoke is provided between the adjacent sub-walls of the two isolation walls.

[0020] According to some embodiments of this application, the insulating cover is further provided with two arc-extinguishing components, which are mounted on the isolation seat and located around the two contact components respectively.

[0021] According to some embodiments of this application, the isolation seat further has two pairs of mounting portions, with the two mounting portions of the pair located on opposite sides of the two stationary contacts of the contact assembly;

[0022] The arc extinguishing assembly includes two arc extinguishing units, which are respectively installed in the two pairs of mounting parts.

[0023] According to some embodiments of this application, the mounting part is connected to the isolation structure.

[0024] According to some embodiments of this application, the mounting part and the isolation structure are an integral structure.

[0025] According to some embodiments of this application, the arc-extinguishing unit includes a plurality of arc-extinguishing grids stacked along the second direction.

[0026] An embodiment of the above application has at least the following advantages or beneficial effects:

[0027] In the relay of this application embodiment, the arrangement of the magnetic poles of the four permanent magnets ensures that, regardless of whether the relay is connected to a positive or negative current, the arc blowing assembly is obliquely arranged to blow the arc between the four stationary contacts and the corresponding moving contacts. Furthermore, the arc blowing directions of the paired stationary contacts are far apart from each other, and the Ampere forces corresponding to the paired stationary contacts will be in the same direction due to the change in the direction of the relay current. This achieves arc breaking between the stationary contacts and the moving contacts, ensuring that the moving contacts and stationary contacts of the relay can be separated in a timely manner.

[0028] Furthermore, by setting an intermediate yoke between adjacent stationary contacts in adjacent contact components, the magnetic field generated by the permanent magnet corresponding to one contact component can be prevented from overflowing into the other contact component, thus ensuring the magnetic field strength at the location of the stationary contact of the contact component and ensuring the arc blowing effect. Attached Figure Description

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0030] Figure 1 The diagram shown is an exploded view of a relay according to an embodiment of this application.

[0031] Figure 2 and Figure 3 The diagram shows the direction of arcing when the relay is connected to positive and negative current.

[0032] Figure 4 The diagram shown is a schematic of the assembled insulating cover, isolating base, and arc-extinguishing assembly.

[0033] Figure 5 The diagram shown is a schematic of the second permanent magnet assembled with the isolator.

[0034] The reference numerals in the attached figures are explained as follows:

[0035] 100. Shell

[0036] 110. Insulating cover

[0037] 111. Ceramic cover

[0038] 1111, Top Wall

[0039] 1112, sidewall

[0040] 112. Frame

[0041] 120. Yoke plate

[0042] 130. Metal Cover

[0043] 200. Contact Part

[0044] 200a, Contact assembly

[0045] 210. Stationary contact

[0046] 220. Moving contact plate

[0047] 300. Arc blowing assembly

[0048] 310.Permanent magnet

[0049] 330. Yoke clamp

[0050] 340. Sub-yoke

[0051] 341. Part One

[0052] 342. Part Two

[0053] 350, intermediate yoke

[0054] 400, Isolation Seat

[0055] 410. Base

[0056] 420. Isolation Structure

[0057] 421. Isolation Wall

[0058] 4211, Sub-wall

[0059] 430. Installation Department

[0060] 431. Mounting slot

[0061] 500, Arc extinguishing assembly

[0062] 510. Arc Extinguishing Unit

[0063] 511. Arc-quenching grid

[0064] 600. Push rod components

[0065] 700, Coil Assembly

[0066] D1, First Direction

[0067] D2, Second Direction

[0068] D3. Third direction Detailed Implementation

[0069] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0070] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0071] like Figure 1 As shown, the relay of this embodiment includes a housing 100, a contact portion 200, a push rod member 600, and a coil assembly 700. The contact portion 200 includes two contact assemblies 200a, each including two stationary contacts 210 and a movable contact piece 220 for contacting or separating from the two stationary contacts 210. The stationary contacts 210 are mounted on the housing 100, and the movable contact piece 220 is movably disposed within the housing 100. The push rod member 600 is movably disposed within the housing 100 and is used to drive the movable contact piece 220 to move. The coil assembly 700 is configured to drive the push rod member 600 to move in response to an input signal, thereby driving the movable contact piece 220 to move.

[0072] For ease of explanation, the arrangement direction of the two stationary contacts 210 of the contact assembly 200a is defined as the first direction D1, and the movement direction of the moving contact 220 is defined as the second direction D2. The first direction D1 and the second direction D2 are perpendicular, and the direction perpendicular to both the first direction D1 and the second direction D2 is defined as the third direction D3. The two contact assemblies 200a are arranged along the third direction D3.

[0073] Each contact component 200a has two stationary contacts 210 that can be electrically connected to the load. Each contact component 200a can control the load circuit, and thus one relay can control multiple loads at the same time, which simplifies the number of electronic components in the control circuit and is conducive to miniaturization.

[0074] In one embodiment, the housing 100 includes an insulating cover 110, a yoke plate 120, and a metal cover 130. The insulating cover 110 is connected to one surface of the yoke plate 120 in the thickness direction, and the metal cover 130 is connected to the other surface of the yoke plate 120 in the thickness direction. The coil assembly 700 is sleeved on the outer periphery of the metal cover 130.

[0075] The yoke plate 120 has a through hole that extends through the yoke plate 120 along its thickness. The insulating cover 110 and the yoke plate 120 form a first chamber, and the metal cover 130 and the yoke plate 120 form a second chamber. The first chamber communicates with the second chamber through the through hole. The stationary contact 210 is mounted on the insulating cover 110, and the moving contact 220 is located within the first chamber.

[0076] In one embodiment, the insulating cover 110 includes a ceramic cover 111 and a frame 112. The ceramic cover 111 is made of ceramic material and is connected to the yoke plate 120 via the frame 112.

[0077] The frame piece 112 can be a ring-shaped metal component, such as one made of an iron-nickel alloy. One end of the frame piece 112 is connected to the edge of the opening of the ceramic cover 111, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame piece 112 is connected to the yoke plate 120, also by laser welding, brazing, resistance welding, or adhesive bonding. A frame piece 112 is provided between the ceramic cover 111 and the yoke plate 120 to facilitate their connection. The stationary contact 210 is mounted on the ceramic cover 111, for example, by welding.

[0078] The ceramic cover 111 may include a top wall 1111 and a side wall 1112. One end of the side wall 1112 is connected to the top wall 1111, and the other end of the side wall 1112 is connected to the yoke plate 120 through a frame 112. The stationary contact 210 is mounted on the top wall 1111.

[0079] In one embodiment, the sidewall 1112 may be a rectangular ring structure, a circular ring structure, or a ring structure of other shapes, and this application does not make any particular limitation thereto.

[0080] like Figure 2 As shown, the relay in this embodiment further includes an arc-blowing assembly 300, which includes four permanent magnets 310. The four permanent magnets 310 are located on both sides of the contact portion 200 along the first direction D1, and correspond to the positions of the four stationary contacts 210. Specifically, the magnetic poles of the facing surfaces of two permanent magnets 310 corresponding to the same contact assembly 200a are opposite, and in the third direction D3, the magnetic poles of the faces of two adjacent permanent magnets 310 facing their respective stationary contacts 210 are opposite.

[0081] For ease of explanation, the four stationary contacts 210 are defined as A1, A2, A3, and A4, and the four permanent magnets 310 are defined as P1, P2, P3, and P4.

[0082] Depend on Figure 2 It can be seen that A1 and A2 belong to one contact component 200a and are arranged opposite each other along the first direction D1. A3 and A4 belong to another contact component 200a and are arranged opposite each other along the first direction D1. At the same time, A1 and A3 are arranged opposite each other along the third direction D3, and A2 and A4 are arranged opposite each other along the third direction D3.

[0083] P1 and P2 are located on both sides of the contact assembly 200a, which includes A1 and A2, along the first direction D1. P1 corresponds to the position of A1, and P2 corresponds to the position of A2. P3 and P4 are located on both sides of the contact assembly 200a, which includes A3 and A4, along the first direction D1, respectively. P3 corresponds to the position of A3, and P4 corresponds to the position of A4.

[0084] It should be noted that "positional correspondence" refers to the overlapping area between the orthographic projections of two objects on a target plane. For example, the positional correspondence between P1 and A1 should be understood as: the overlapping area between the orthographic projections of P1 and A1 on a target plane. Here, the target plane is perpendicular to the first direction D1.

[0085] Among them, the magnetic pole of P1 facing A1 is the N pole, the magnetic pole of P2 facing A2 is the S pole, the magnetic pole of P3 facing A3 is the S pole, and the magnetic pole of P4 facing A4 is the N pole. In addition, the current flow direction of the four stationary contacts 210 is A1 in and A2 out, and A4 in and A3 out.

[0086] Taking A1 as an example, the magnetic field lines M1 emitted from the N pole of P1 enter the S pole of P2 horizontally to the right. Magnetic field lines M2 scatter out along an arc to the lower left of A1, and magnetic field lines M3 scatter out along an arc to the upper left of A1. According to the left-hand rule, the direction of the Ampere force generated by M1 is vertically downward, the direction of the Ampere force generated by M2 is to the lower left, and the direction of the Ampere force generated by M3 is to the lower right. Since M3 is located to the upper left of A1, its influence on the direction of the resultant force is relatively weak, while M2, located to the lower left of A1, plays a dominant role in influencing the direction of the resultant force. Therefore, considering all factors, the Ampere force experienced by the arc generated between the moving contact 220 and A1 is F11, directed to the lower left.

[0087] Similarly, the Ampere force on the arc generated between the moving contact 220 and A2 is F21, the Ampere force on the arc generated between the moving contact 220 and A3 is F31, and the Ampere force on the arc generated between the moving contact 220 and A4 is F41.

[0088] like Figure 3 As shown, the magnetic pole arrangement of the four permanent magnets P1, P2, P3, and P4 remains unchanged, while the direction of the current flowing through the relay is different. Figure 2 The difference lies in the direction of current flow in the four stationary contacts 210: A2 in, A1 out; A3 in, A4 out. Based on the left-hand rule and the above analysis of A1, the Ampere force on the arc generated between the moving contact 220 and A1 is F12, between the moving contact 220 and A2 is F22, between the moving contact 220 and A3 is F32, and between the moving contact 220 and A4 is F42.

[0089] Combination Figure 2 and Figure 3 As can be seen, in the relay of this application embodiment, through the arrangement of the magnetic poles of the four permanent magnets 310, regardless of whether the relay is connected to a positive or negative current, the arc blowing assembly 300 arranges the arc blowing direction between the four stationary contacts 210 and the corresponding moving contact 220 obliquely, and the arc blowing directions of the paired stationary contacts 210 are far apart from each other. Due to the change in the direction of the relay current, the Ampere force corresponding to the paired stationary contacts 210 will be in the same direction, thereby realizing the arc breaking of the stationary contacts 210 and the moving contact 220, ensuring that the moving contact 220 and the stationary contacts 210 of the relay can be broken in time.

[0090] like Figure 4 As shown, permanent magnets 310 are arranged on the outer wall surface of the insulating cover 110. In the embodiment of this application, four permanent magnets 310 are arranged on the outer wall surface of the side wall 1112 of the ceramic cover 111.

[0091] The arc blowing assembly 300 also includes a yoke clamp 330 arranged on the outer periphery of the insulating cover 110, and a permanent magnet 310 mounted on the side surface of the yoke clamp 330 facing the insulating cover 110.

[0092] In this embodiment of the application, by providing a yoke clamp 330 on the outer periphery of the insulating cover 110 and mounting the permanent magnet 310 on the side surface of the yoke clamp 330 facing the insulating cover 110, the magnetic field lines of the permanent magnet 310 can be prevented from overflowing outward, thereby increasing the magnetic field strength and ensuring the arc blowing effect.

[0093] like Figures 2 to 4 As shown, the yoke clamp 330 includes two pairs of sub-yokes 340, one pair of sub-yokes 340 being symmetrically arranged on both sides of one of the contact components 200a along the first direction D1, and the other pair of yokes 340 being symmetrically arranged on both sides of another contact component 200a along the first direction D1; four permanent magnets 310 are respectively mounted on the surface of the four sub-yokes 340 facing the insulating cover 110.

[0094] Of course, in other embodiments, the yoke clamp 330 may also be a single integral piece, rather than multiple separate pieces.

[0095] like Figures 2 to 4 As shown, the sub-yoke 340 includes a first portion 341 and a second portion 342 that are perpendicular to each other. In one embodiment, one end of the first portion 341 is connected to one end of the second portion 342 so that the sub-yoke 340 generally forms an L-shaped structure.

[0096] Two sub-yokes 340s symmetrically arranged in the first direction D1 have permanent magnets 310 on their facing surfaces at their first portions 341. The second portions 342 of the two sub-yokes 340s extend from their respective first portions 341 along the first direction D1 toward each other. That is, if the sidewall 1112 of the ceramic cover 111 is a rectangular ring structure, the four sub-yokes 340 are respectively wrapped around the four corners of the rectangular ring structure.

[0097] like Figures 2 to 4 As shown, the arc blowing assembly 300 also includes an intermediate yoke 350, which is disposed within the first cavity enclosed by the insulating cover 110 and the yoke plate 120. Intermediate yokes 350 are provided between adjacent stationary contacts 210 in adjacent contact assemblies 200a. The number of intermediate yokes 350 provided between adjacent stationary contacts 210 can be one or more.

[0098] For example, such as Figure 2 and Figure 3 As shown, two intermediate yokes 350 are provided between A1 and A3, and two intermediate yokes 350 are provided between A2 and A4.

[0099] In this embodiment of the application, by providing an intermediate yoke 350 between adjacent stationary contacts 210 in adjacent contact components 200a, the magnetic field generated by the permanent magnet 310 corresponding to one contact component 200a can be prevented from overflowing into the other contact component 200a, thus ensuring the magnetic field strength at the location of the stationary contact 210 of the contact component 200a and ensuring the arc blowing effect.

[0100] like Figure 1 and Figure 5 As shown, an isolation seat 400 is also provided inside the insulating cover 110. The isolation seat 400 has a base 410 and an isolation structure 420, and the isolation structure 420 is connected to the base 410. An isolation structure 420 is provided between adjacent contact assemblies 200a, and an intermediate yoke 350 is installed in the isolation structure 420.

[0101] In this embodiment of the application, an isolation structure 420 is provided between adjacent contact components 200a. The isolation structure 420 can insulate and isolate adjacent contact components 200a, so as to prevent adjacent contact components 200a from affecting each other when the contact components 200a are energized.

[0102] In one embodiment, the isolation seat 400 is made of an insulating material, such as plastic or ceramic.

[0103] The isolation structure 420 has two isolation walls 421 arranged at intervals along the third direction D3, and the second permanent magnet 320 is disposed between the two isolation walls 421.

[0104] In this embodiment of the application, two isolation walls 421 are provided between adjacent contact components 200a, spaced apart along a third direction D3, with a gap between the two isolation walls 421. On the one hand, this increases the creepage distance between adjacent contact components 200a, further reducing the risk of mutual interference between adjacent contact components 200a; on the other hand, the intermediate yoke 350 can be installed in the gap between adjacent isolation walls 421.

[0105] Furthermore, the isolation wall 421 has two sub-walls 4211 spaced apart along the first direction D1. An intermediate yoke 350 is provided between adjacent sub-walls 4211 of the two isolation walls 421.

[0106] Please continue reading. Figure 1 and Figure 5 The insulating cover 110 also contains multiple arc-extinguishing components 500, which are mounted on the isolating base 400 and located around the multiple contact components 200a. By placing the arc-extinguishing components 500 around the multiple contact components 200a, the elongated arc can be extinguished in a timely manner, preventing the arc from burning the moving contact 220 and the stationary contact 210, and extending the service life of the relay.

[0107] The isolator 400 also has multiple pairs of mounting portions 430, which are connected to the base 410. The two pairs of mounting portions 430 are located on opposite sides of the two stationary contacts 210 of the contact assembly 200a. The arc-extinguishing assembly 500 includes two arc-extinguishing units 510, each mounted on one of the pairs of mounting portions 430.

[0108] In one embodiment, the mounting portion 430 is connected to the isolation structure 420. Further, the mounting portion 430 and the isolation structure 420 are an integral structure.

[0109] The mounting part 430, the isolation structure 420 and the base 410 can be an integrated structure.

[0110] In one embodiment, the mounting part 430 has a mounting groove 431, and the arc extinguishing unit 510 is confined within the mounting groove 431.

[0111] In one embodiment, the arc extinguishing unit 510 includes multiple arc extinguishing grid plates 511 stacked along the second direction D2. The electric arc generated between the moving contact 220 and the stationary contact 210 can be transferred to the arc extinguishing unit 510 and extinguished by the cutting of the multiple arc extinguishing grid plates 511.

[0112] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0113] In this embodiment of the relay, the arrangement of the magnetic poles of the four permanent magnets 310 ensures that, regardless of whether the relay is connected to a positive or negative current, the arc blowing assembly 300 obliquely arranges the arc blowing direction between the four stationary contacts 210 and the corresponding moving contacts 220. Furthermore, the arc blowing directions of the paired stationary contacts 210 are far apart from each other, and the Ampere forces corresponding to the paired stationary contacts 210 will be in the same direction due to the change in the direction of the relay current. This achieves arc breaking between the stationary contacts 210 and the moving contacts 220, ensuring that the moving contacts 220 and the stationary contacts 210 of the relay can be disconnected in a timely manner.

[0114] Furthermore, by providing an intermediate yoke 350 between adjacent stationary contacts 210 in adjacent contact components 200a, the magnetic field generated by the permanent magnet 310 corresponding to one contact component 200a can be prevented from overflowing into the other contact component 200a, thus ensuring the magnetic field strength at the location of the stationary contact 210 of the contact component 200a and ensuring the arc blowing effect.

[0115] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0116] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0117] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0118] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. 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.

[0119] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay characterized by comprising: The relay comprises: a contact part comprising two contact assemblies, each of the contact assemblies comprising two static contacts and a moving contact piece for contacting or separating from the static contacts; the arrangement direction of the two static contacts of each of the contact assemblies is defined as a first direction, the moving direction of the moving contact piece is defined as a second direction, the first direction is perpendicular to the second direction, and the direction perpendicular to both the first direction and the second direction is defined as a third direction; a plurality of the contact assemblies are arranged along the third direction; an arc blowing assembly comprising four permanent magnets, each of the permanent magnets is located at the two sides of the contact part along the first direction and corresponds to a position of a static contact; wherein the magnetic poles of the surfaces of the two permanent magnets corresponding to the same contact assembly face each other in opposite directions, and in the third direction, the magnetic poles of the surfaces of the two adjacent permanent magnets facing the static contacts corresponding to the two permanent magnets are opposite.

2. The relay according to claim 1, characterized in that The relay further comprises an insulating cover, the static contacts are arranged on the insulating cover, and the moving contact piece is movably arranged in the insulating cover; the permanent magnets are arranged on the outer wall surface of the insulating cover.

3. The relay according to claim 2, characterized in that The arc blowing assembly further comprises a yoke clamp arranged on the outer circumferential side of the insulating cover, and the permanent magnets are mounted on the side surface of the yoke clamp facing the insulating cover.

4. The relay according to claim 3, characterized in that The yoke clamp comprises two pairs of sub-yoke clamps, one pair of the sub-yoke clamps is symmetrically arranged at the two sides of one of the contact assemblies along the first direction, and the other pair of the sub-yoke clamps is symmetrically arranged at the two sides of the other contact assembly along the first direction; four of the permanent magnets are respectively mounted on the side surface of four of the sub-yoke clamps facing the insulating cover.

5. The relay of claim 4, wherein The sub-yoke clamps comprise a first part and a second part perpendicular to each other; the first parts of the two sub-yoke clamps symmetrically arranged in the first direction face each other, and the second parts of the two sub-yoke clamps respectively extend from the corresponding first parts in the first direction towards each other.

6. The relay of claim 3, wherein The arc blowing assembly further comprises an intermediate yoke clamp arranged between the adjacent static contacts of the adjacent contact assemblies.

7. The relay according to claim 6, characterized in that The insulating cover further comprises a partition seat having a partition structure, the partition structure is arranged between the adjacent contact assemblies, and the intermediate yoke clamp is arranged on the partition structure.

8. The relay according to claim 7, characterized in that The partition structure has two partition walls arranged along the third direction and spaced apart from each other, and the intermediate yoke clamp is arranged between the two partition walls.

9. The relay of claim 8, wherein The partition wall has two sub-walls arranged along the first direction and spaced apart from each other; the intermediate yoke clamp is arranged between the adjacent sub-walls of the two partition walls.

10. The relay of claim 7, wherein The insulating cover further comprises two arc extinguishing assemblies, the two arc extinguishing assemblies are arranged on the partition seat and located around the two contact assemblies.

11. The relay according to claim 10, characterized in that The partition seat further comprises two pairs of mounting portions, each pair of the mounting portions is located on the side of the two static contacts of the contact assembly facing away from each other. The arc extinguishing assembly comprises two arc extinguishing units arranged on each pair of the mounting portions.

12. The relay of claim 11, wherein, The mounting portion is connected with the partition structure.

13. The relay of claim 12, wherein, The mounting portion and the partition structure are in one body.

14. The relay of claim 11, wherein, The arc extinguishing unit comprises a plurality of arc extinguishing grid pieces arranged in a stack in the second direction.

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