Arc extinguishing structure and switch

Abstract

The invention provides an arc extinguishing structure and a switch, and belongs to the technical field of electronics. The arc extinguishing structure comprises a permanent magnet, a first grid plate assembly and a second grid plate assembly, the permanent magnet comprises a first side surface and a second side surface which are positioned on two opposite sides, and an end surface positioned between the first side surface and the second side surface; the first grid plate assembly is located on the first side face of the permanent magnet, and the first grid plate assembly extends back to the first side face to form a first extending face. The second grid plate assembly is located on the second side face of the permanent magnet and extends back to the second side face to form a second extending face. The first extension surface, the end surface and the second extension surface are used for providing a moving path for a moving contact of the switch. According to the invention, good arc extinguishing performance can be realized.

Description

Technical Field

[0001] This disclosure belongs to the field of electronic technology, and specifically relates to an arc extinguishing structure and a switch. Background Technology

[0002] A switch is a common electrical component that is widely used in electrical systems to control the opening and closing of circuits.

[0003] In related technologies, one type of switch is the load disconnect switch, which is used to isolate the de-energized part of an electrical system from the energized part. It mainly consists of a stationary contact, a moving contact, and an arc-extinguishing chamber. The circuit is turned on or off by the movement of the moving contact engaging or disengaging from the stationary contact. During the separation of the moving and stationary contacts, arcing can occur between them. To reduce arcing, related technologies place the stationary contact within the arc-extinguishing chamber, which then extinguishes the arc.

[0004] However, the arc extinguishing effect of arc extinguishing chambers is limited, and for high-load electrical systems, the arc extinguishing chambers in related technologies are difficult to meet the requirements. Summary of the Invention

[0005] This disclosure provides an arc-extinguishing structure and switch that exhibits excellent arc-extinguishing performance. The technical solution is as follows: In a first aspect, embodiments of this disclosure provide an arc-extinguishing structure, including a permanent magnet, a first grid assembly, and a second grid assembly; The permanent magnet includes a first side surface and a second side surface located on opposite sides, and an end face located between the first side surface and the second side surface; The first grid assembly is located at the first side of the permanent magnet, and the first grid assembly extends away from the first side to form a first extension surface; The second grid assembly is located on the second side of the permanent magnet, and the second grid assembly extends away from the second side to form a second extended surface; The first extended surface, the end face, and the second extended surface are used to provide a movement path for the moving contact of the switch.

[0006] In one implementation of this disclosure, one side of the first extension surface, one side of the end face, and one side of the second extension surface have arc-extinguishing spaces; The arc-extinguishing space corresponding to the first extension surface and the arc-extinguishing space corresponding to the second extension surface are connected through the arc-extinguishing space corresponding to the end face, and the arc-extinguishing space is used for the movement of the moving contact.

[0007] In another implementation of this disclosure, the arc-extinguishing structure further includes a base; The base includes a receiving frame and trays located on both sides of the receiving frame; The permanent magnet is located within the receiving frame, the first grid assembly is located on one of the trays, and the second grid assembly is located on the other tray.

[0008] In yet another implementation of this disclosure, the tray has a slot; The extension direction of the slot is consistent with the extension direction of the first grid assembly or the second grid assembly; The first grid assembly and the second grid assembly are respectively inserted into the corresponding slots.

[0009] Secondly, embodiments of this disclosure provide a switch, including an arc-extinguishing chamber, a driving assembly, and an on / off assembly; The arc-extinguishing chamber includes an outer shell and an arc-extinguishing structure, wherein the arc-extinguishing structure is located inside the outer shell, and the arc-extinguishing structure is the arc-extinguishing structure according to any one of the claims; The drive component is located outside the housing; The switching assembly includes a stationary contact and a moving contact. At least a portion of the stationary contact is located inside the housing and is arranged adjacent to and spaced apart from the first grid assembly. The moving contact is rotatably located inside the housing and is connected to the drive assembly. When the drive assembly drives the moving contact to separate from the stationary contact, the moving contact's movement trajectory passes sequentially through the first grid assembly, the permanent magnet, and the second grid assembly.

[0010] In one implementation of this disclosure, the outer casing includes a first casing and a second casing; The first housing and the second housing are connected, and the side of the first housing facing the second housing has a positioning frame; The arc-extinguishing structure is snapped into the positioning frame.

[0011] In another implementation of this disclosure, the side of the second housing facing the first housing has a positioning plate; The positioning plate is inserted into the positioning frame, with one side of the positioning plate facing the arc-extinguishing structure and the other side of the positioning plate facing the inner wall of the positioning frame.

[0012] In another implementation of this disclosure, the arc-extinguishing chamber has two arc-extinguishing structures, which are spaced apart from each other. The moving contact is located between the two arc-extinguishing structures; The switching component includes two stationary contacts, each corresponding to one of the two arc-extinguishing structures.

[0013] In another implementation of this disclosure, the moving contact includes a rotating shaft and two contact pieces; The rotating shaft is rotatably located within the housing; The two contact pieces are spaced apart from each other and are respectively connected to the rotating shaft. When the moving contact and the stationary contact are combined, the two contact pieces respectively contact the opposite sides of the stationary contact.

[0014] In another implementation of this disclosure, the stationary contact includes a connected contact head and a terminal portion; The contact head is located inside the housing, and the contact head is arranged adjacent to and spaced apart from the first grid assembly; The terminal portion is located outside the housing.

[0015] The beneficial effects of the technical solutions provided in this disclosure are: The arc-extinguishing structure provided in this embodiment can be applied to the arc-extinguishing chamber of a switch. The first grid assembly and the second grid assembly are located on opposite sides of the permanent magnet. The first grid assembly extends away from the first side of the permanent magnet, and the second grid assembly extends away from the second side of the permanent magnet. That is, the first and second grid assemblies extend along opposite sides of the permanent magnet, giving the arc-extinguishing structure an extended shape, which increases the arc-extinguishing space and improves its arc-extinguishing performance. During arc extinguishing, the moving contact of the switch can move sequentially along the first extension surface of the first grid assembly, the end face of the permanent magnet, and the second extension surface of the second grid assembly. During this movement, the permanent magnet controls the arc's direction of movement through its own strong magnetic field, thus elongating the arc. The first and second grid assemblies then cut the elongated arc into several short arc segments. Each short arc segment forms an independent near-pole voltage drop inside the first and second grid assemblies. These segments, when superimposed, significantly increase the total arc voltage drop, thereby accelerating the current to zero and achieving the arc-extinguishing effect.

[0016] Because the moving contact can move sequentially through the first extension surface of the first grid assembly, the end face of the permanent magnet, and the second extension surface of the second grid assembly, the arc extinguishing space of the arc extinguishing structure is large, which can better elongate and cut the arc, effectively improving the arc extinguishing performance of the arc extinguishing structure. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is an exploded view of the switch provided in the embodiments of this disclosure; Figure 2 This is an exploded view of the arc-extinguishing structure provided in the embodiments of this disclosure; Figure 3 This is a schematic diagram of the internal structure of the switch provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of the switching on / off state of a switch provided in an embodiment of this disclosure; Figure 5 This is an assembly diagram of the arc-extinguishing structure provided in the embodiments of this disclosure.

[0019] The symbols in the diagram represent the following meanings: 10. Permanent magnet; 110. First side face; 120. Second side face; 130. End face; 20. First grid assembly; 210. First sub-grid; 30. Second grid assembly; 310. Second sub-grid; 40. Arc extinguishing space; 50. Base; 510. Receiving frame; 520. Tray; 521. Slot; 60. Connecting piece; 100. Arc-extinguishing chamber; 1100, Outer shell; 1110, First shell; 1111, Positioning frame; 1112, Connecting frame; 1120, Second shell; 1121, Positioning plate; 1200, Arc extinguishing structure; 200. Driver components; 300. On / off components; 3100, stationary contact; 3110, contact head; 3120, terminal part; 3130, connecting part; 3200, moving contact; 3210, contact piece; 3220, rotating shaft.

[0020] The accompanying drawings have illustrated specific embodiments of this disclosure, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concepts of this disclosure to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0022] This disclosure provides a switch, Figure 1 See the exploded view of the switch. Figure 1The switch includes an arc-extinguishing chamber 100, a drive assembly 200, and an on / off assembly 300.

[0023] The arc-extinguishing chamber 100 includes an outer shell 1100 and an arc-extinguishing structure 1200, with the arc-extinguishing structure 1200 located inside the outer shell 1100. Figure 2 This is an exploded view of the arc-extinguishing structure 1200, combined with... Figure 2 The arc-extinguishing structure 1200 includes a permanent magnet 10, a first grid assembly 20, and a second grid assembly 30. The permanent magnet 10 includes a first side surface 110 and a second side surface 120 located on opposite sides, and an end face 130 located between the first side surface 110 and the second side surface 120. The first grid assembly 20 is located at the first side surface 110 of the permanent magnet 10 and extends away from the first side surface 110 to form a first extension surface. The second grid assembly 30 is located at the second side surface 120 of the permanent magnet 10 and extends away from the second side surface 120 to form a second extension surface. The first extension surface, the end face 130, and the second extension surface provide a movement path for the moving contact 3200 of the switch.

[0024] The drive component 200 is located outside the housing 1100.

[0025] Figure 3 This is a schematic diagram of the internal structure of the switch, combined with... Figure 3 The switching component 300 includes a stationary contact 3100 and a moving contact 3200. At least a portion of the stationary contact 3100 is located within the housing 1100 and is arranged adjacent to and spaced apart from the first grid assembly 20. The moving contact 3200 is rotatably located within the housing 1100 and is connected to the drive assembly 200. When the drive assembly 200 drives the moving contact 3200 to separate from the stationary contact 3100, the moving trajectory of the moving contact 3200 sequentially passes through the first extension surface of the first grid assembly 20, the end face 130 of the permanent magnet 10, and the second extension surface of the second grid assembly 30.

[0026] The drive assembly 200 can drive the moving contact 3200 to rotate relative to the housing 1100. During the rotation, when the moving contact 3200 rotates to engage with the stationary contact 3100, the switch is in the on state (see...). Figure 4 (Top side) When the moving contact 3200 rotates to separate from the stationary contact 3100, the switch is in the off state (see [link]). Figure 4 (Lower side).

[0027] During the switch transition from the ON state to the OFF state, the moving contact 3200 and the stationary contact 3100 gradually separate. At this time, the moving contact 3200 moves sequentially along the first extension surface of the first grid assembly 20, the end face 130 of the permanent magnet 10, and the second extension surface of the second grid assembly 30, generating an arc between the moving contact 3200 and the stationary contact 3100. After the arc is formed, the permanent magnet 10 controls the arc's direction of movement through its own strong magnetic field, thus elongating the arc. The first grid assembly 20 and the second grid assembly 30 then cut the elongated arc into several short arc segments. Each short arc segment forms an independent near-polar voltage drop within the first grid assembly 20 and the second grid assembly 30. These voltage drops, when superimposed, significantly increase the total arc voltage drop, thereby accelerating the current to zero and achieving the arc-extinguishing effect.

[0028] Since the first grid assembly 20 and the second grid assembly 30 are located on opposite sides of the permanent magnet 10, with the first grid assembly 20 extending away from the first side 110 of the permanent magnet 10 and the second grid assembly 30 extending away from the second side 120 of the permanent magnet 10, that is, the first grid assembly 20 and the second grid assembly 30 extend along opposite sides of the permanent magnet 10, making the arc extinguishing structure 1200 have an overall extended shape, which is beneficial to increase its arc extinguishing space 40, and can better elongate and cut the arc, thereby improving its arc extinguishing performance.

[0029] See also Figure 1 In this embodiment, the switch has two arc-extinguishing chambers 100 and two switching components 300. The two arc-extinguishing chambers 100 are arranged side by side, and the two switching components 300 are respectively located in the corresponding arc-extinguishing chambers 100. The moving contacts 3200 of the two switching components 300 are connected in a driving manner to ensure that the two moving contacts 3200 rotate synchronously. The drive component 200 is connected in a driving manner to the moving contact 3200 of one switching component 300.

[0030] In other embodiments, the number of arc-extinguishing chambers 100 and switching components 300 can also be other values, such as three or four. The arrangement of the arc-extinguishing chambers 100, the drive assembly 200, and the switching components 300 is similar to that described above and will not be repeated here.

[0031] See also Figure 3 In this embodiment, the arc-extinguishing chamber 100 has two arc-extinguishing structures 1200, which are spaced apart from each other. The moving contact 3200 is located between the two arc-extinguishing structures 1200. The switching component 300 includes two stationary contacts 3100, which correspond to the two arc-extinguishing structures 1200 respectively.

[0032] In the above implementation, one arc-extinguishing structure 1200 corresponds to one stationary contact 3100, so the arcs generated at the two stationary contacts 3100 can be extinguished by the corresponding arc-extinguishing structure 1200.

[0033] See you again Figure 3 In this embodiment, the moving contact 3200 includes a rotating shaft 3220 and two contact pieces 3210. The rotating shaft 3220 is rotatably located inside the housing 1100. The two contact pieces 3210 are spaced apart from each other and are respectively connected to the rotating shaft 3220. When the moving contact 3200 and the stationary contact 3100 are combined, the two contact pieces 3210 respectively contact the opposite sides of the stationary contact 3100.

[0034] In the above implementation, the rotating shaft 3220 is connected to the drive assembly 200 via a transmission connection, and the rotating shaft 3220 provides a mounting base for the contact pieces 3210. When the moving contact 3200 and the stationary contact 3100 are engaged, both contact pieces 3210 of the moving contact 3200 are in contact with the stationary contact 3100. In this way, even if one contact piece 3210 has poor contact with the stationary contact 3100, the other contact piece 3210 can still make normal contact with the stationary contact 3100, thereby effectively ensuring the contact reliability between the moving contact 3200 and the stationary contact 3100.

[0035] It is worth noting that when there are two stationary contacts 3100, the rotating shaft 3220 has two pairs of contact pieces 3210, that is, four contact pieces 3210, and one pair of contact pieces 3210 corresponds to one stationary contact 3100.

[0036] For example, the two contacts 3210 are parallel to each other, and the stationary contact 3100 and the two contacts 3210 are both parallel to the plane where the rotation trajectory of the moving contact 3210 is located.

[0037] This design ensures that the two contact pieces 3210 reliably move to both sides of the stationary contact 3100 as they rotate along the track.

[0038] See also Figure 3 In this embodiment, the stationary contact 3100 includes a contact head 3110 and a terminal portion 3120 connected together. The contact head 3110 is located inside the housing 1100 and is arranged adjacent to and spaced apart from the first grid assembly 20. The terminal portion 3120 is located outside the housing 1100.

[0039] In the above implementation, the contact head 3110 of the stationary contact 3100 is located inside the housing 1100 and is used to combine with the moving contact 3200 so that the switch is in the conducting state. The terminal portion 3120 of the stationary contact 3100 is located outside the housing 1100 and is used to connect to the external circuit.

[0040] For example, the contact head 3110 has a ramp at the outer edge of the moving contact 3200, thereby facilitating the insertion of the contact head 3110 between the two contact pieces 3210.

[0041] In this embodiment, the stationary contact 3100 further includes a connecting portion 3130, which is located inside the housing 1100. One end of the connecting portion 3130 is connected to the contact head 3110, and the other end of the connecting portion 3130 is connected to the terminal portion 3120.

[0042] For example, the contact head 3110, the connecting portion 3130 and the terminal portion 3120 are all sheet-like structural members. The contact head 3110 and the terminal portion 3120 are both perpendicular to the connecting portion 3130, and the contact head 3110 and the terminal portion 3120 are perpendicular to each other.

[0043] As mentioned above, the arc-extinguishing structure 1200 plays a crucial role in the arc-extinguishing performance of the switch. The arc-extinguishing structure 1200 will be explained below.

[0044] See you again Figure 2 In this embodiment, one side of the first extension surface, one side of the end face 130, and one side of the second extension surface have arc-extinguishing spaces 40. The arc-extinguishing spaces 40 corresponding to the first extension surface and the second extension surface are connected through the arc-extinguishing spaces 40 corresponding to the end face 130. The arc-extinguishing spaces 40 are used for the movement of the moving contact 3200 of the switch.

[0045] In the above implementation, the moving contact 3200 moves within the arc-extinguishing space 40, causing an arc to form between the moving contact 3200 and the stationary contact 3100 within the arc-extinguishing space 40. This allows the first grid assembly 20, the second grid assembly 30, and the permanent magnet 10 to fully engage with the arc, facilitating rapid arc extinguishing.

[0046] In other words, the movable contact 3210 always moves on one side of the first grid assembly 20, one side of the second grid assembly 30, and one side of the permanent magnet 10.

[0047] See also Figure 2 In this embodiment, the arc extinguishing structure 1200 also includes a base 50, which includes a receiving frame 510 and trays 520 located on both sides of the receiving frame 510. The permanent magnet 10 is located inside the receiving frame 510, the first grid assembly 20 is located in one tray 520, and the second grid assembly 30 is located in the other tray 520.

[0048] In the above implementation, the base 50 provides a mounting foundation for the permanent magnet 10, the first grid assembly 20, and the second grid assembly 30. The receiving frame 510 is located between two trays 520. The permanent magnet 10 is disposed within the receiving frame 510, the first grid assembly 20 is located within one tray 520, and the second grid assembly 30 is located within the other tray 520. This arrangement stabilizes the relative positions of the permanent magnet 10, the first grid assembly 20, and the second grid assembly 30, ensuring that the electric arc can be reliably extinguished.

[0049] In this embodiment, the two trays 520 are located on the same plane, and the receiving frame 510 protrudes relative to this plane. Since the first grid assembly 20 and the second grid assembly 30 have a certain width, the receiving frame 510 is arranged in this way so that the permanent magnet 10 located in the receiving frame 510 is exactly at the middle position in the width direction of the first grid assembly 20 and the second grid assembly 30, which is beneficial to improving the synergistic effect between the first grid assembly 20, the second grid assembly 30 and the permanent magnet 10.

[0050] In this embodiment, the first grid assembly 20 includes a plurality of first sub-grids 210, which are arranged side by side with intervals and are parallel to each other. The arrangement direction of each first sub-grid 210 is consistent with the length direction of the permanent magnet 10.

[0051] Correspondingly, the second grid assembly 30 includes a plurality of second sub-grids 310, and the arrangement of each second sub-grid 310 is similar to that of each first sub-grid 210, which will not be described in detail here.

[0052] In some examples, the first sub-gate 210 and the second sub-gate 310 correspond one-to-one, and the corresponding first sub-gate 210 and second sub-gate 310 are connected by a connecting piece 60.

[0053] In this case, the first sub-gate 210, the second sub-gate 310, and the connecting piece 60 are integral structural components, which enables electrical connection between the first gate assembly and the second gate assembly.

[0054] Of course, in other examples, the first sub-grid 210 and the second sub-grid 310 may not be connected and may be independent entities.

[0055] See also Figure 2 In this embodiment, the tray 520 has a slot 521, the extension direction of the slot 521 is consistent with the extension direction of the first grid assembly 20 or the second grid assembly 30, and the first grid assembly 20 and the second grid assembly 30 are respectively inserted into the corresponding slot 521.

[0056] In the above implementation, slot 521 provides accommodating space for each sub-grid, so that each sub-grid can be arranged reasonably according to the design requirements, thereby ensuring that the positional relationship between the first grid assembly 20, the second grid assembly 30 and the permanent magnet 10 meets the design requirements.

[0057] The structure of the arc extinguishing structure 1200 itself has been described above. The following describes the installation method of the arc extinguishing structure 1200 inside the housing 1100.

[0058] Figure 5 This is an assembly diagram of the arc-extinguishing structure 1200. To illustrate the structure of the inner walls of the first housing 1110 and the second housing 1120, the second housing 1120 has been flipped over. Figure 5 In this embodiment, the outer casing 1100 includes a first casing 1110 and a second casing 1120. The first casing 1110 and the second casing 1120 are connected, and the side of the first casing 1110 facing the second casing 1120 has a positioning frame 1111. The arc extinguishing structure 1200 is snapped into the positioning frame 1111.

[0059] In the above implementation, the positioning frame 1111 is used to position the arc-extinguishing structure 1200 within the housing 1100, ensuring that the arc-extinguishing structure 1200 is reliably and stably located within the housing 1100. Furthermore, positioning the arc-extinguishing component using the positioning frame 1111 simplifies the internal structure of the housing 1100 while ensuring reliable assembly of the arc-extinguishing structure 1200.

[0060] For example, the inner contour of the positioning frame 1111 matches the outer contour of the base 50. This design ensures the positioning effect of the positioning frame 1111 on the arc extinguishing structure 1200.

[0061] See also Figure 5 In this embodiment, the second housing 1120 has a positioning plate 1121 on the side facing the first housing 1110. The positioning plate 1121 is inserted into the positioning frame 1111, and one side of the positioning plate 1121 is opposite to the arc extinguishing structure 1200, while the other side of the positioning plate 1121 is opposite to the inner wall of the positioning frame 1111.

[0062] In the above implementation, the positioning plate 1121 is inserted into the positioning frame 1111, so that the positioning plate 1121 and the positioning frame 1111 can together position the arc-extinguishing structure 1200. That is, the positioning frame 1111 is used to position the arc-extinguishing structure 1200 on the first housing 1110, and the positioning plate 1121 is used to position the arc-extinguishing structure 1200 on the second housing 1120.

[0063] For example, there are two positioning plates 1121, which are parallel to each other and located on both sides of the arc extinguishing structure 1200. One positioning plate 1121 is opposite to the first grid assembly 20, and the other positioning plate 1121 is opposite to the second grid assembly 30.

[0064] This design allows the two positioning plates 1121 to clamp the arc-extinguishing structure 1200 in the middle, thereby improving the positioning effect of the arc-extinguishing component.

[0065] See also Figure 5 In this embodiment, the side of the first housing 1110 facing the second housing 1120 has a plug frame 1112, and the connecting part 3130 of the stationary contact 3100 is inserted into the plug frame 1112.

[0066] By accommodating the connecting part 3130 through the plug frame 1112, the stationary contact 3100 can be securely installed inside the housing 1100, thereby improving the reliability of the switch.

[0067] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” “third,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described objects changes, the relative positional relationship may also change accordingly.

[0068] The above description is merely an optional embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. An arc-extinguishing structure, characterized in that, It includes a permanent magnet (10), a first grid assembly (20), and a second grid assembly (30); The permanent magnet (10) includes a first side surface (110) and a second side surface (120) located on opposite sides, and an end face (130) located between the first side surface (110) and the second side surface (120). The first grid assembly (20) is located at the first side (110) of the permanent magnet (10), and the first grid assembly (20) extends away from the first side (110) to form a first extension surface; The second grid assembly (30) is located at the second side (120) of the permanent magnet (10), and the second grid assembly (30) extends away from the second side (120) to form a second extension surface; The first extension surface, the end face (130), and the second extension surface are used to provide a movement path for the moving contact (3200) of the switch.

2. The arc-extinguishing structure according to claim 1, characterized in that, One side of the first extension surface, one side of the end face (130) and one side of the second extension surface have an arc extinguishing space (40). The arc-extinguishing space (40) corresponding to the first extension surface and the arc-extinguishing space (40) corresponding to the second extension surface are connected through the arc-extinguishing space (40) corresponding to the end face (130), and the arc-extinguishing space (40) is used for the moving contact (3200) to move.

3. The arc-extinguishing structure according to claim 1 or 2, characterized in that, The arc-extinguishing structure also includes a base (50); The base (50) includes a receiving frame (510) and trays (520) located on both sides of the receiving frame (510). The permanent magnet (10) is located within the receiving frame (510), the first grid assembly (20) is located in one of the trays (520), and the second grid assembly (30) is located in the other tray (520).

4. The arc-extinguishing structure according to claim 3, characterized in that, The tray (520) has a slot (521); The extension direction of the slot (521) is consistent with the extension direction of the first grid assembly (20) or the second grid assembly (30); The first grid assembly (20) and the second grid assembly (30) are respectively inserted into the corresponding slots (521).

5. A switch, characterized in that, It includes an arc-extinguishing chamber (100), a drive assembly (200), and a switching assembly (300). The arc-extinguishing chamber (100) includes an outer shell (1100) and an arc-extinguishing structure (1200), wherein the arc-extinguishing structure (1200) is located inside the outer shell (1100), and the arc-extinguishing structure (1200) is the arc-extinguishing structure according to any one of claims 1 to 4; The drive assembly (200) is located outside the housing (1100); The switching assembly (300) includes a stationary contact (3100) and a moving contact (3200). At least a portion of the stationary contact (3100) is located inside the housing (1100) and is arranged adjacent to and spaced apart from the first grid assembly (20). The moving contact (3200) is rotatably located inside the housing (1100) and is connected to the drive assembly (200). When the drive assembly (200) drives the moving contact (3200) to separate from the stationary contact (3100), the moving trajectory of the moving contact (3200) passes sequentially through the first grid assembly (20), the permanent magnet (10), and the second grid assembly (30).

6. The switch according to claim 5, characterized in that, The outer casing (1100) includes a first casing (1110) and a second casing (1120). The first housing (1110) and the second housing (1120) are connected, and the side of the first housing (1110) facing the second housing (1120) has a positioning frame (1111). The arc-extinguishing structure (1200) is snapped into the positioning frame (1111).

7. The switch according to claim 6, characterized in that, The second housing (1120) has a positioning plate (1121) on the side facing the first housing (1110). The positioning plate (1121) is inserted into the positioning frame (1111), and one side of the positioning plate (1121) is opposite to the arc extinguishing structure (1200), and the other side of the positioning plate (1121) is opposite to the inner wall of the positioning frame (1111).

8. The switch according to claim 5, characterized in that, The arc-extinguishing chamber (100) has two arc-extinguishing structures (1200) spaced apart from each other. The moving contact (3200) is located between the two arc-extinguishing structures (1200); The switching assembly (300) includes two stationary contacts (3100), each corresponding to one of the two arc-extinguishing structures (1200).

9. The switch according to claim 5, characterized in that, The moving contact (3200) includes a rotating shaft (3220) and two contact pieces (3210). The rotating shaft (3220) is rotatably located within the housing (1100); The two contact pieces (3210) are spaced apart from each other and are respectively connected to the rotating shaft (3220). When the moving contact (3200) and the stationary contact (3100) are combined, the two contact pieces (3210) respectively contact the opposite sides of the stationary contact (3100).

10. The switch according to claim 5, characterized in that, The stationary contact (3100) includes a contact head (3110) and a terminal portion (3120) connected together. The contact head (3110) is located inside the housing (1100), and the contact head (3110) is arranged adjacent to and spaced apart from the first grid assembly (20); The terminal portion (3120) is located outside the housing (1100).

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