Relay

Abstract

The present disclosure provides a relay, comprising a sealed housing, a plurality of contact assemblies, and an isolation base. Each contact assembly comprises a movable contact and two static contacts, the static contacts are arranged on the sealed housing, and the movable contact is movably arranged in the sealed housing and is adapted to come into contact with or be separated from the two static contacts. The isolation base is arranged in the sealed housing and comprises first isolation structures, and each first isolation structure is arranged between adjacent contact assemblies.

Description

relay

[0001] This disclosure claims priority to Chinese Patent Application No. 202411896591.5, filed on December 20, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of electrical control device technology, and more specifically, to a relay. Background Technology

[0003] 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

[0004] This disclosure provides a relay to solve the problem of complex and bulky control circuits in related technologies.

[0005] The relay of this disclosure embodiment includes:

[0006] Sealed housing;

[0007] 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

[0008] 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.

[0009] According to some embodiments of this disclosure, 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.

[0010] According to some embodiments of this disclosure, the first isolation wall has two sub-walls, which are spaced apart along the arrangement direction of the pair of stationary contacts;

[0011] 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.

[0012] According to some embodiments of this disclosure, 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.

[0013] According to some embodiments of this disclosure, the isolating 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;

[0014] The arc extinguishing assembly includes two arc extinguishing units, which are respectively installed in the two pairs of mounting parts.

[0015] According to some embodiments of this disclosure, the mounting portion is connected to the first isolation structure.

[0016] According to some embodiments of this disclosure, the mounting part and the first isolation structure are an integral structure.

[0017] According to some embodiments of this disclosure, the mounting part has a mounting groove, and the arc extinguishing unit is located within the mounting groove.

[0018] According to some embodiments of this disclosure, the arc extinguishing unit includes multiple stacked arc extinguishing grids.

[0019] According to some embodiments of this disclosure, 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.

[0020] According to some embodiments of this disclosure, 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.

[0021] According to some embodiments of this disclosure, the relay further includes a push rod member movably disposed within the sealed housing, and the movable contact pieces of the plurality of contact components are mounted on the push rod member;

[0022] The push rod component has a second isolation structure, and the second isolation structure is provided between adjacent moving contact pieces.

[0023] According to some embodiments of this disclosure, the second isolation structure includes two second isolation walls, which are spaced apart along the arrangement direction of the plurality of moving contact pieces.

[0024] According to some embodiments of this disclosure, 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.

[0025] According to some embodiments of this disclosure, the insulating cover is made of ceramic material and is connected to the yoke plate by a frame.

[0026] According to some embodiments of this disclosure, the sealed housing is also filled with arc-quenching gas.

[0027] One embodiment disclosed above has at least the following advantages or beneficial effects:

[0028] The relay of this disclosure includes multiple contact components and an isolating base. Each contact component has two stationary contacts that can be electrically connected to a 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

[0029] Figure 1 shows an exploded view of a relay according to a first embodiment of the present disclosure.

[0030] Figure 2 shows 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 disclosure.

[0031] Figure 3 shows a schematic diagram of the arc-extinguishing assembly of the relay according to the first embodiment of the present disclosure installed on the isolation base, wherein the insulating cover is partially cut open.

[0032] Figure 4 shows a perspective view of a relay according to the first embodiment of this disclosure.

[0033] Figure 5 shows a cross-sectional view after being cut along section line AA in Figure 4.

[0034] Figure 6 shows an enlarged view of point X1 in Figure 5.

[0035] Figure 7 shows a schematic diagram of the stationary contact and isolating base of the relay according to the second embodiment of this disclosure.

[0036] Figure 8 shows an exploded view of the arc extinguishing assembly and the isolating seat of the second embodiment of this disclosure from one perspective.

[0037] Figure 9 shows an exploded view of the arc extinguishing assembly and isolation seat of the second embodiment of this disclosure from another perspective.

[0038] The reference numerals in the attached drawings are explained as follows: 100, Sealed housing; 110, Insulating cover; 111, Top wall; 112, Side wall; 120, Frame plate; 130, Yoke plate; 140, Metal cover; 200, Contact assembly; 210, Stationary contact; 220, Moving contact plate; 300, Isolation seat; 310, First isolation structure; 311, First isolation wall; 3111, Sub-wall; 320, Mounting part; 321, Mounting groove; 330, Base; 331, Perforation; 400, Arc extinguishing assembly; 410, Arc extinguishing unit; 411, Arc extinguishing grid plate; 420, Permanent magnet; 430, Yoke clamp; 440, Gap; 500, Push rod component; 510, Second isolation structure; 511, Second isolation wall; 600, Coil assembly; 700, Airflow channel; D1, First direction; D2, Second direction; D3, Third direction. Detailed Implementation

[0039] 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 disclosure 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.

[0040] It is understood that the terms "comprising" and "having," and any variations thereof, used in the embodiments of this disclosure, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus 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 such processes, methods, products, or apparatus.

[0041] As shown in Figures 1 and 2, the relay of 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.

[0042] The relay of this 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 a 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.

[0043] Referring to Figures 1 and 2, the sealing 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. The stationary contact 210 is mounted on the insulating cover 110. The 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.

[0044] 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.

[0045] 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.

[0046] The sidewall 112 can be a rectangular ring structure, a circular ring structure, or a ring structure of other shapes, and this disclosure does not make any special limitation in this regard.

[0047] It is understood that the relays in the embodiments of this disclosure may include two, three, four or other numbers of contact components 200, and this disclosure does not particularly limit this number.

[0048] 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.

[0049] In this embodiment of the disclosure, 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.

[0050] As shown in Figures 1 and 2, 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.

[0051] In this embodiment of the present disclosure, two first isolation walls 311 are provided between adjacent contact components 200 at intervals along a 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.

[0052] 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.

[0053] 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.

[0054] As shown in Figure 1, 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.

[0055] In this embodiment of the present disclosure, multiple moving contacts 220 are mounted on the same push rod member 500, and each moving contact 220 corresponds to a pair of stationary contacts 210. When the push rod member 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.

[0056] 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.

[0057] 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.

[0058] In this embodiment of the present disclosure, 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.

[0059] As shown in Figure 2, 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 isolation 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).

[0060] 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.

[0061] As shown in Figures 2 and 3, 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.

[0062] In this embodiment of the present disclosure, 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 the closing and opening process can be eliminated in a timely manner. On the one hand, this avoids the electric arcs generated by adjacent contact components 200 from merging and forming 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.

[0063] As shown in Figures 2 and 3, the isolating seat 300 also has multiple pairs of mounting portions 320. The pairs of mounting portions 320 are arranged at intervals along a first direction D1, and a contact assembly 200 is provided between the two mounting portions 320. Specifically, the two mounting portions 320 are located on opposite sides of the two stationary contacts 210 of the contact assembly 200. The arc-extinguishing assembly 400 includes two arc-extinguishing units 410, each mounted on one of the pairs of mounting portions 320.

[0064] In this embodiment of the present disclosure, 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.

[0065] 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.

[0066] 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.

[0067] In this embodiment of the present disclosure, the mounting part 320, the base part 330, and the first isolation structure 310 are an integral structure.

[0068] Of course, in other embodiments, the mounting part 320 and the first isolation structure 310 may not be connected, but may be independent components.

[0069] In one embodiment, the mounting part 320 has a mounting groove 321, and the arc extinguishing unit 410 is confined within the mounting groove 321.

[0070] 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.

[0071] 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.

[0072] As shown in Figures 4 to 6, 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, the 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.

[0073] In this embodiment, multiple arc-extinguishing grid plates 411 can "cut" the electric arc into multiple shorter 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.

[0074] 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.

[0075] Of course, in other embodiments, the arc-extinguishing grid 411 may also be made of other metallic materials or non-metallic materials.

[0076] As shown in Figures 7 to 9, the similarities between the second embodiment and the first embodiment of this disclosure will not be repeated here, but the differences are as follows:

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] As shown in Figure 9, the mounting groove 321 can be formed by recessing the mounting part 320 into the mounting part 320 along the second direction D2 on one side surface of the mounting part 320 facing the yoke plate 130.

[0082] In summary, the relays of the present disclosure embodiments have at least the following advantages and beneficial effects:

[0083] The relay of this 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 a 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.

[0084] It is understood that the various embodiments / implementations provided in this disclosure can be combined with each other without creating contradictions, and will not be described in detail here.

[0085] In the disclosed embodiments, 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 disclosed embodiments according to the specific circumstances.

[0086] In the description of the disclosed embodiments, 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 disclosed embodiments 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 disclosed embodiments.

[0087] 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 disclosed embodiments. 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.

[0088] The above are merely preferred embodiments of the disclosed embodiments and are not intended to limit the disclosed embodiments. For those skilled in the art, the disclosed embodiments can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the disclosed embodiments should be included within the protection scope of the disclosed embodiments.

Claims

1. A relay characterized by comprising: 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 of claim 1, wherein 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 of claim 4, wherein 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 of claim 5, wherein 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 of claim 5, wherein The mounting part has a mounting groove, and the arc extinguishing unit is located within the mounting groove.

9. The relay of claim 5, wherein, The arc-extinguishing unit comprises multiple stacked arc-extinguishing grid plates.

10. The relay of claim 9, wherein 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 of claim 5, wherein 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 of claim 1, wherein 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 of claim 12, wherein, 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 of claim 14, wherein, 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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