relay

Abstract

The application discloses a relay, comprising a sealed shell, a plurality of contact assemblies and an isolation seat. The contact assembly comprises a moving contact and two static contacts, the static contacts are arranged on the sealed shell, and the moving contact is movably arranged in the sealed shell and used for contacting or separating from the two static contacts. The isolation seat is arranged in the sealed shell and comprises a first isolation structure, and the first isolation structure is arranged between adjacent contact assemblies.

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. In related technologies, multiple relays are often used to control multiple circuits. However, multiple relays lead to complex control circuits and a larger size. Summary of the Invention

[0003] This application provides a relay to solve the problem of complex and bulky control circuits in related technologies.

[0004] The relay in this application embodiment includes:

[0005] Sealed housing;

[0006] Multiple contact components, each contact component including a movable contact piece and two stationary contacts, the stationary contacts being mounted on the sealing housing, and the movable contact piece being movably disposed within the sealing housing for contacting or separating from the two stationary contacts; and

[0007] An isolation seat is disposed within the sealed housing and includes a first isolation structure, wherein the first isolation structure is provided between adjacent contact components.

[0008] According to some embodiments of this application, the first isolation structure between adjacent contact components includes two first isolation walls, which are spaced apart along the arrangement direction of the two adjacent contact components.

[0009] According to some embodiments of this application, the first isolation wall has two sub-walls, which are spaced apart along the arrangement direction of the pair of stationary contacts;

[0010] The two sub-walls are respectively located on one side of the two stationary contacts of one of the contact components, facing the two stationary contacts of the other contact component.

[0011] According to some embodiments of this application, the relay further includes a plurality of arc-extinguishing components located within the sealed housing, the plurality of arc-extinguishing components being mounted on the isolating base and respectively located around the plurality of contact components.

[0012] According to some embodiments of this application, the isolation seat also has multiple pairs of mounting portions, with two of the pairs of mounting portions located on opposite sides of the two stationary contacts of the contact assembly;

[0013] The arc extinguishing assembly includes two arc extinguishing units, which are respectively installed in the two pairs of mounting parts.

[0014] According to some embodiments of this application, the mounting part is connected to the first isolation structure.

[0015] According to some embodiments of this application, the mounting part and the first isolation structure are an integral structure.

[0016] According to some embodiments of this application, the mounting part has a mounting groove, and the arc extinguishing unit is located within the mounting groove.

[0017] According to some embodiments of this application, the arc extinguishing unit includes multiple stacked arc extinguishing grids.

[0018] According to some embodiments of this application, there is a gap between adjacent arc-extinguishing grid plates, and an airflow channel communicating with the gap exists between the arc-extinguishing unit and the inner wall surface of the sealing housing.

[0019] According to some embodiments of this application, the arc extinguishing unit includes a permanent magnet and a yoke clamp, the yoke clamp being located on the side of the permanent magnet facing away from the stationary contact.

[0020] According to some embodiments of this application, the relay further includes a push rod member, which is movably disposed within the sealed housing, and the movable contact pieces of the plurality of contact components are mounted on the push rod member;

[0021] The push rod component has a second isolation structure, and the second isolation structure is provided between adjacent moving contact pieces.

[0022] According to some embodiments of this application, the second isolation structure includes two second isolation walls, which are spaced apart along the arrangement direction of the plurality of moving contact pieces.

[0023] According to some embodiments of this application, the sealing housing includes a yoke plate and an insulating cover. The insulating cover is installed on one side of the yoke plate in the thickness direction. The stationary contact is installed on the insulating cover. The isolation seat and the moving contact are located inside the insulating cover, and the isolation seat is attached to the yoke plate.

[0024] According to some embodiments of this application, the insulating cover is made of ceramic material and is connected to the yoke plate by a frame.

[0025] According to some embodiments of this application, the sealed housing is also filled with arc-quenching gas.

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

[0027] The relay of this application embodiment includes multiple contact components and an isolating base. Each contact component has two stationary contacts that can be electrically connected to the load, enabling each contact component to control the load circuit. Therefore, one relay can simultaneously control multiple loads, simplifying the number of electronic components in the control circuit and facilitating miniaturization. Furthermore, the isolating base includes a first isolation structure. Adjacent contact components are provided with a first isolation structure, which serves to insulate and isolate adjacent contact components, preventing mutual interference when the contact components are energized. Attached Figure Description

[0028] Figure 1 The diagram shown is an exploded view of the relay according to the first embodiment of this application.

[0029] Figure 2 The diagram shown is an exploded view of the insulating cover, yoke plate, arc extinguishing assembly, and isolating base of the relay according to the first embodiment of this application.

[0030] Figure 3 The diagram shown is a schematic of the arc-extinguishing assembly of the relay according to the first embodiment of this application installed on the isolation base, wherein the insulating cover is partially cut open.

[0031] Figure 4 The diagram shown is a perspective view of a relay according to the first embodiment of this application.

[0032] Figure 5 The diagram shows along Figure 4 A cross-sectional view after being cut along section line AA.

[0033] Figure 6 What is shown is Figure 5 A magnified view of point X1 in the middle.

[0034] Figure 7 The diagram shown is a schematic of the stationary contact and isolating base of the relay according to the second embodiment of this application.

[0035] Figure 8 The diagram shown is an exploded view of the arc extinguishing assembly and the isolating seat according to the second embodiment of this application.

[0036] Figure 9 The diagram shown is an exploded view of the arc extinguishing assembly and isolation seat of the second embodiment of this application from another perspective.

[0037] The reference numerals in the attached figures are explained as follows:

[0038] 100. Sealed housing

[0039] 110. Insulating cover

[0040] 111. Top Wall

[0041] 112. Sidewall

[0042] 120. Frame piece

[0043] 130. Yoke plate

[0044] 140. Metal Cover

[0045] 200. Contact components

[0046] 210. Stationary contact

[0047] 220. Moving contact plate

[0048] 300, Isolation Seat

[0049] 310. First isolation structure

[0050] 311. First Separation Wall

[0051] 3111, Sub-wall

[0052] 320. Installation Department

[0053] 321. Mounting slot

[0054] 330. Base

[0055] 331. Perforation

[0056] 400. Arc extinguishing assembly

[0057] 410. Arc-extinguishing unit

[0058] 411. Arc-quenching grid

[0059] 420. Permanent magnet

[0060] 430. Yoke clamp

[0061] 440. Gap

[0062] 500. Push rod components

[0063] 510. Second isolation structure

[0064] 511. Second Separation Wall

[0065] 600. Coil Assembly

[0066] 700, airflow channel

[0067] D1, First Direction

[0068] D2, Second Direction

[0069] D3. Third direction Detailed Implementation

[0070] 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.

[0071] 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.

[0072] like Figure 1 and Figure 2 As shown, the relay in this embodiment includes a sealed housing 100, a plurality of contact components 200, and an isolating base 300. Each contact component 200 includes a moving contact 220 and two stationary contacts 210. The stationary contacts 210 are mounted on the sealed housing 100, and the moving contact 220 is movably disposed within the sealed housing 100 for contacting or separating from the two stationary contacts 210. The isolating base 300 is disposed within the sealed housing 100 and includes a first isolation structure 310, which is provided between adjacent contact components 200.

[0073] The relay of this application embodiment includes multiple contact components 200 and an isolating base 300. Each contact component 200 has two stationary contacts 210 that can be electrically connected to a load, enabling each contact component 200 to control the load circuit. Thus, one relay can simultaneously control multiple loads, simplifying the number of electronic components in the control circuit and facilitating miniaturization. Furthermore, the isolating base 300 includes a first isolation structure 310. The first isolation structure 310 is provided between adjacent contact components 200, providing insulation and preventing interference between adjacent contact components 200 when they are energized.

[0074] Please continue reading. Figure 1 and Figure 2The sealed housing 100 may include an insulating cover 110, a frame plate 120, a yoke plate 130, and a metal cover 140. The insulating cover 110 and the frame plate 120 are located on one side of the thickness direction of the yoke plate 130, and the metal cover 140 is located on the other side of the thickness direction of the yoke plate 130. A stationary contact 210 is mounted on the insulating cover 110. An isolating seat 300 is located inside the insulating cover 110 and is attached to the surface of the yoke plate 130 facing the insulating cover 110.

[0075] In one embodiment, the insulating cover 110 is made of ceramic material and is connected to the yoke plate 130 via a frame plate 120. The frame plate 120 can be a ring-shaped metal part, such as one made of an iron-nickel alloy. One end of the frame plate 120 is connected to the opening edge of the insulating cover 110, for example, by laser welding, brazing, resistance welding, or adhesive bonding. The other end of the frame plate 120 is connected to the yoke plate 130, also by laser welding, brazing, resistance welding, or adhesive bonding. The frame plate 120 is provided between the insulating cover 110 and the yoke plate 130 to facilitate the connection between them.

[0076] The insulating cover 110 includes a top wall 111 and a side wall 112, with the side wall 112 surrounding a plurality of contact assemblies 200. The top wall 111 is fitted with a stationary contact 210. One end of the side wall 112 is connected to the edge of the top wall 111, and the other end of the side wall 112 is connected to the yoke plate 130 via a frame plate 120.

[0077] The sidewall 112 can be a rectangular ring structure, a circular ring structure, or a ring structure of other shapes. This application does not make any special limitation on this.

[0078] It is understood that the relay in the embodiments of this application may include two, three, four or other contact components 200, and this application does not make any special limitation on this.

[0079] Furthermore, for ease of explanation, the arrangement direction of the two stationary contacts 210 of the contact assembly 200 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 is perpendicular to the second direction D2, and the direction that is perpendicular to both the first direction D1 and the second direction D2 is defined as the third direction D3. That is, the first direction D1, the second direction D2, and the third direction D3 are all perpendicular to each other.

[0080] In the embodiments of this application, a plurality of contact components 200 are arranged along a third direction D3, and a plurality of movable contact pieces 220 are also arranged along a third direction D3.

[0081] like Figure 1 and Figure 2As shown, the first isolation structure 310 between adjacent contact components 200 includes two first isolation walls 311, which are spaced apart along the arrangement direction (third direction D3) of the two adjacent contact components 200.

[0082] In this embodiment of the application, two first isolation walls 311 are provided between adjacent contact components 200 at intervals along the third direction D3. There is a gap between the two first isolation walls 311, which increases the creepage distance between adjacent contact components 200 and further reduces the risk of mutual interference between adjacent contact components 200.

[0083] The first isolation wall 311 has two sub-walls 3111, which are spaced apart along the arrangement direction (first direction D1) of the pair of stationary contacts 210. The two sub-walls 3111 are respectively located on the side of the two stationary contacts 210 of one contact assembly 200 facing the two stationary contacts 210 of the other contact assembly 200.

[0084] For example, taking two contact components 200 as an example, the two contact components 200 include a total of four stationary contacts 210, with two stationary contacts 210 of each contact component 200 arranged along the first direction D1. Along the third direction D3, the two stationary contacts 210 of one contact component 200 correspond to the two stationary contacts 210 of the other contact component 200 respectively. On the third direction D3, two sub-walls 3111 are provided between the corresponding two stationary contacts 210.

[0085] like Figure 1 As shown, the relay also includes a push rod member 500 and a coil assembly 600. The push rod member 500 is movably disposed within the sealed housing 100 along a second direction D2. The moving contact pieces 220 of a plurality of contact assemblies 200 are mounted on the push rod member 500. The coil assembly 600 is located on the side of the yoke plate 130 facing away from the stationary contact 210. The coil assembly 600 is configured to drive the push rod member 500 to move along the second direction D2 in response to an input signal, so as to cause the moving contact pieces 220 to contact or separate from the stationary contact 210.

[0086] In the embodiments of this application, multiple moving contacts 220 are mounted on the same push rod component 500, and each moving contact 220 corresponds to a pair of stationary contacts 210. When the push rod component 500 moves, multiple moving contacts 220 move simultaneously, thereby achieving the effect of "single-drive multiple-action", which is conducive to the miniaturization and integration of the relay size, and at the same time reduces the cost of the product to a certain extent.

[0087] The push rod component 500 has a second isolation structure 510, which is provided between adjacent moving contacts 220. The second isolation structure 510 can insulate and isolate adjacent moving contacts 220, thereby preventing adjacent moving contacts 220 from affecting each other when the contact assembly 200 is energized.

[0088] In one embodiment, the second isolation structure 510 includes two second isolation walls 511, which are spaced apart along the arrangement direction (third direction D3) of the plurality of movable contact pieces 220.

[0089] In this embodiment of the application, there is a gap between the two second isolation walls 511, which increases the creepage distance between adjacent moving contacts 220 and further reduces the risk of mutual interference between adjacent moving contacts 220.

[0090] like Figure 2 As shown, the isolating seat 300 also includes a base 330. For example, the base 330 can be plate-shaped. The base 330 is attached to the surface of the yoke plate 130 facing the stationary contact 210, and the first isolating structure 310 is connected to the base 330. The push rod member 500 is movably inserted through the through hole 331 of the base 330. Figure 3 )

[0091] In one embodiment, the isolation base 300 is made of an insulating material, such as plastic or ceramic. The base 330 and the first isolation structure 310 can be separate structures or an integral structure. When the base 330 and the first isolation structure 310 are an integral structure, they are both made of the same insulating material. When the base 330 and the first isolation structure 310 are separate structures, they can be made of different insulating materials, or they can be made of the same insulating material.

[0092] like Figure 2 and Figure 3 As shown, the relay also includes a plurality of arc-extinguishing components 400 located within the sealed housing 100. The plurality of arc-extinguishing components 400 are mounted on the isolating base 300 and are respectively located around the plurality of contact components 200.

[0093] In this embodiment, by providing an arc-extinguishing component 400 around the contact component 200, the electric arc generated by the moving contact 220 and the stationary contact 210 during closing and opening can be eliminated in a timely manner. On the one hand, this avoids the electric arcs generated by adjacent contact components 200 from coalescing into a longer arc; on the other hand, timely extinguishing of the arc can effectively prevent the arc from burning the moving contact 220 and the stationary contact 210, thereby extending the service life of the relay; furthermore, the arc-extinguishing component 400 is installed in the isolation base 300, and the arc-extinguishing component 400 is located inside the insulating cover 110 rather than outside the insulating cover 110, which can reduce the size of the relay and is beneficial for miniaturization.

[0094] like Figure 2 and Figure 3 As shown, the isolating seat 300 also has multiple pairs of mounting portions 320, with the two mounting portions 320 arranged at intervals along the first direction D1, and a contact assembly 200 provided between the two mounting portions 320. That is, the two mounting portions 320 are respectively located on the opposite sides of the two stationary contacts 210 of the contact assembly 200. The arc extinguishing assembly 400 includes two arc extinguishing units 410, which are respectively mounted on the two pairs of mounting portions 320.

[0095] In this embodiment of the application, the isolation seat 300 has two pairs of mounting portions 320, that is, four mounting portions 320, which are arranged at the four corners of the base 330. A first isolation structure 310 is provided between the two pairs of mounting portions 320.

[0096] In one embodiment, the mounting portion 320 is connected to the first isolation structure 310, thereby improving the stability of both the mounting portion 320 and the first isolation structure 310. Furthermore, the mounting portion 320 is also connected to the base portion 330.

[0097] In one embodiment, the mounting portion 320 and the first isolation structure 310 are an integral structure. Of course, in other embodiments, the mounting portion 320 and the first isolation structure 310 may also be separate structures.

[0098] In the embodiments of this application, the mounting part 320, the base part 330, and the first isolation structure 310 are an integral structure.

[0099] Of course, in other embodiments, the mounting part 320 and the first isolation structure 310 may not be connected, but may be independent components.

[0100] In one embodiment, the mounting part 320 has a mounting groove 321, and the arc extinguishing unit 410 is located within the mounting groove 321.

[0101] The arc extinguishing unit 410 may include multiple stacked arc extinguishing grid plates 411. The electric arc generated by the moving contact 220 and the stationary contact 210 can be transferred to the arc extinguishing unit 410 and extinguished by the cutting of the multiple arc extinguishing grid plates 411.

[0102] In one embodiment, the sealed housing 100 is further filled with an arc-extinguishing gas. This arc-extinguishing gas can be hydrogen, nitrogen, or other mixtures of gases that facilitate arc extinguishing. Hydrogen has a high thermal conductivity, effectively absorbing the heat from the arc generated between the moving contact 220 and the stationary contact 210 and transferring it to the surrounding medium, thus cooling the arc. Furthermore, the arc pressure drop in hydrogen is higher, making arc extinguishing easier. On the other hand, nitrogen has a high ionization energy and is less prone to breakdown, resulting in a smaller arc generated when the moving contact 220 and the stationary contact 210 come into contact.

[0103] like Figures 4 to 6 As shown, there is a gap 440 between adjacent arc-extinguishing grid plates 411, and an airflow channel 700 communicating with the gap 440 is formed between the arc-extinguishing unit 410 and the inner wall surface of the sealing housing 100. In one embodiment, an airflow channel 700 is formed between the arc-extinguishing unit 410 and the inner wall surface of the side wall 112 of the insulating cover 110.

[0104] In this embodiment, multiple arc-extinguishing grid plates 411 can "cut" the electric arc into multiple shorter arc segments, which is beneficial for arc extinguishing and significantly improves the overload breaking capacity of the relay, achieving the breaking effect of high voltage and high current. Furthermore, since there is an airflow channel 700 communicating with the gap 440 between the arc-extinguishing unit 410 and the inner wall of the sealing housing 100, this airflow channel 700 allows gas to pass through. When the electric arc enters the arc-extinguishing unit 410, the gas in the gap 440 between adjacent arc-extinguishing grid plates 411 can be discharged into the airflow channel 700, allowing the electric arc to enter the arc-extinguishing unit 410 more quickly, thereby lengthening the arc more rapidly. While "cutting" the electric arc, the arc-extinguishing grid plates 411 can also cool the arc, achieving the purpose of extinguishing the arc.

[0105] In one embodiment, the arc-extinguishing grid plate 411 can be made of iron. The iron arc-extinguishing grid plate 411 can attract the electric arc, which is beneficial to absorbing the electric arc and allowing the electric arc to enter the arc-extinguishing unit 410 more quickly.

[0106] Of course, in other embodiments, the arc-extinguishing grid 411 may also be made of other metallic materials or non-metallic materials.

[0107] like Figures 7 to 9 As shown, the similarities between the second embodiment and the first embodiment of this application will not be repeated here, but the differences are as follows:

[0108] The arc extinguishing unit 410 includes a permanent magnet 420 and a yoke clip 430. The permanent magnet 420 and the yoke clip 430 are installed in the mounting groove 321 of the isolation seat 300. The yoke clip 430 is located on the side of the permanent magnet 420 that faces away from the stationary contact 210.

[0109] By setting two opposing permanent magnets 420, a magnetic field can be formed around the contact assembly 200. Therefore, under the action of the magnetic field, the electric arc generated between the moving contact 220 and the stationary contact 210 will be elongated in a direction away from each other, thus extinguishing the arc.

[0110] In addition, the design of the yoke clamp 430 can prevent the magnetic field generated by the permanent magnet 420 from spreading outward and affecting the arc extinguishing effect.

[0111] The yoke clip 430 can be made of soft magnetic material, which may include, but is not limited to, iron, cobalt, nickel, and their alloys.

[0112] like Figure 9 As shown, the mounting groove 321 can be formed by recessing the mounting portion 320 into the mounting portion 320 along the second direction D2 from the side surface of the mounting portion 320 facing the yoke plate 130.

[0113] In summary, the relays of the embodiments of this application have at least the following advantages and beneficial effects:

[0114] The relay of this application embodiment includes multiple contact components 200 and an isolating base 300. Each contact component 200 has two stationary contacts 210 that can be electrically connected to a load, enabling each contact component 200 to control the load circuit. Thus, one relay can simultaneously control multiple loads, simplifying the number of electronic components in the control circuit and facilitating miniaturization. Furthermore, the isolating base 300 includes a first isolation structure 310. The first isolation structure 310 is provided between adjacent contact components 200, providing insulation and preventing interference between adjacent contact components 200 when they are energized.

[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 in that, include: Sealed housing; Multiple contact components, each contact component including a movable contact piece and two stationary contacts, the stationary contacts being mounted on the sealed housing, and the movable contact piece being movably disposed within the sealed housing for contacting or separating from the two stationary contacts; as well as An isolation seat is disposed within the sealed housing and includes a first isolation structure, wherein the first isolation structure is provided between adjacent contact components.

2. The relay according to claim 1, characterized in that, The first isolation structure between adjacent contact components includes two first isolation walls, which are spaced apart along the arrangement direction of the two adjacent contact components.

3. The relay according to claim 2, characterized in that, The first isolation wall has two sub-walls, which are spaced apart along the arrangement direction of the pair of stationary contacts; The two sub-walls are respectively located on one side of the two stationary contacts of one of the contact components, facing the two stationary contacts of the other contact component.

4. The relay according to claim 1, characterized in that, The relay also includes a plurality of arc-extinguishing components located within the sealed housing, the plurality of arc-extinguishing components being mounted on the isolating base and respectively located around the plurality of contact components.

5. The relay according to claim 4, characterized in that, The isolating seat also has multiple pairs of mounting parts, with each pair of mounting parts located on opposite sides of the two stationary contacts of the contact assembly; The arc extinguishing assembly includes two arc extinguishing units, which are respectively installed in the two pairs of mounting parts.

6. The relay according to claim 5, characterized in that, The mounting part is connected to the first isolation structure.

7. The relay according to claim 6, characterized in that, The mounting section and the first isolation structure are an integral structure.

8. The relay according to claim 5, characterized in that, The mounting part has a mounting groove, and the arc extinguishing unit is located within the mounting groove.

9. The relay according to claim 5, characterized in that, The arc-extinguishing unit comprises multiple stacked arc-extinguishing grid plates.

10. The relay according to claim 9, characterized in that, There is a gap between adjacent arc-extinguishing grid plates, and there is an airflow channel communicating with the gap between the arc-extinguishing unit and the inner wall surface of the sealing housing.

11. The relay according to claim 5, characterized in that, The arc-extinguishing unit includes a permanent magnet and a yoke clamp, with the yoke clamp located on the side of the permanent magnet facing away from the stationary contact.

12. The relay according to claim 1, characterized in that, The relay also includes a push rod component, which is movably disposed within the sealed housing, and the movable contact pieces of the plurality of contact components are mounted on the push rod component; The push rod component has a second isolation structure, and the second isolation structure is provided between adjacent moving contact pieces.

13. The relay according to claim 12, characterized in that, The second isolation structure includes two second isolation walls, which are spaced apart along the arrangement direction of the plurality of moving contact pieces.

14. The relay according to any one of claims 1 to 13, characterized in that, The sealing housing includes a yoke plate and an insulating cover. The insulating cover is installed on one side of the yoke plate in the thickness direction. The stationary contact is installed on the insulating cover. The isolation seat and the moving contact are located inside the insulating cover, and the isolation seat is attached to the yoke plate.

15. The relay according to claim 14, characterized in that, The insulating cover is made of ceramic material and is connected to the yoke plate by a frame.

16. The relay according to any one of claims 1 to 13, characterized in that, The sealed housing is also filled with arc-quenching gas.

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