Contact assembly and low voltage switch

Abstract

The application relates to the technical field of low-voltage electrical apparatus, and particularly discloses a contact assembly and a low-voltage switch, which comprises a movable contact structure and a static contact structure matched with the movable contact structure; the movable contact structure comprises a rotating piece, a mechanism linkage shaft and a movable contact body arranged on the rotating piece; an arc-shaped groove is arranged on the rotating piece, the center of the arc-shaped groove coincides with the rotating axis of the rotating piece; the mechanism linkage shaft abuts against one end of the arc-shaped groove and drives the rotating piece to rotate around the rotating axis; the movable contact body is separated from the static contact structure, the mechanism linkage shaft abuts against the other end of the arc-shaped groove, and the rotating piece rotates around the rotating axis under the action of inertial force. The application can increase the maximum distance between the movable contact structure and the static contact structure in the process of separation by inertial force without increasing the volume of the low-voltage switch shell, so that the arc extinguishing performance of the low-voltage switch is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-voltage electrical apparatus, in particular to a contact assembly and a low-voltage switch. BACKGROUND

[0002] A conventional low-voltage switch generally adopts an arc-extinguishing chamber structure composed of multiple parallel or radially arranged grid fins to extinguish an arc. At present, the way of increasing the number of grid fins is generally adopted to improve the arc interruption voltage and the arc-extinguishing capacity of the low-voltage switch, so that the low-voltage switch can meet higher voltage arc-extinguishing requirements. However, due to the small size of the low-voltage switch, the internal space of the switch housing is limited, so the way of increasing the number of grid fins or increasing the extension length of the moving contact structure to improve the arc interruption capacity is limited by the size of the low-voltage switch.

[0003] In the prior art, the moving contact of the contact assembly is generally driven by a rotating member, and the rotation angle of the driving shaft is equal to the rotation angle of the moving contact, so that the opening distance of the moving contact and the stationary contact is limited and cannot be further lengthened, which results in that the arc-extinguishing capacity of the low-voltage switch cannot be further improved. SUMMARY

[0004] The purpose of the present application is to provide a contact assembly and a low-voltage switch, which can increase the maximum distance between the moving contact structure and the stationary contact structure by inertial force without increasing the size of the low-voltage switch housing, thereby improving the arc-extinguishing performance of the low-voltage switch.

[0005] Embodiments of the present application are implemented as follows:

[0006] In a first aspect, the embodiments of the present application provide a contact assembly, comprising a moving contact structure and a stationary contact structure arranged in cooperation with the moving contact structure; the moving contact structure comprises a rotating member, a mechanism linkage shaft, and a moving contact body arranged on the rotating member; an arc-shaped groove is arranged on the rotating member, and the center of the arc-shaped groove coincides with the rotation axis of the rotating member; the mechanism linkage shaft abuts one end of the arc-shaped groove and drives the rotating member to rotate around the rotation axis; the moving contact body is opened with the stationary contact structure, the mechanism linkage shaft abuts the other end of the arc-shaped groove, and the rotating member rotates around the rotation axis under the action of inertial force.

[0007] As an optional implementation, the extension direction of the mechanism linkage shaft is perpendicular to the rotation plane of the rotating member.

[0008] As an optional implementation, the maximum rotation angle of the moving contact body and the stationary contact structure when closed is 90°; and / or, the maximum rotation angle of the moving contact body and the stationary contact structure when opened is 150°.

[0009] As an optional implementation, there are at least two arc-shaped grooves, which are distributed at intervals with the rotation axis as the center.

[0010] In a second aspect, the embodiments of the present application provide a low-voltage switch, which comprises a shell, the contact assembly and a hybrid arc-extinguishing chamber; the hybrid arc-extinguishing chamber comprises a grid arc-extinguishing assembly and a magnetic arc-extinguishing assembly arranged along a moving path of a moving contact body of the contact assembly, and is used for extinguishing an arc generated by the contact assembly in the shell.

[0011] As an optional implementation, there are two moving contact bodies symmetrically arranged on the rotating member; and two hybrid arc-extinguishing chambers are arranged on both sides of the rotating member and correspond to the two moving contact bodies respectively.

[0012] As an optional implementation, the hybrid arc-extinguishing chamber is projected as an L-shaped structure on a rotation plane of the rotating member; the shell has a rectangular cavity, the rotating member is arranged in a middle part of the rectangular cavity, and the two L-shaped structures are arranged at two non-adjacent corners of the rectangular cavity respectively.

[0013] As an optional implementation, the moving contact body opens in sequence through the grid arc-extinguishing assembly and the magnetic arc-extinguishing assembly; or, the moving contact body opens in sequence through the magnetic arc-extinguishing assembly and the grid arc-extinguishing assembly.

[0014] As an optional implementation, the shell is provided with exhaust channels on both sides of the hybrid arc-extinguishing chamber, the exhaust channels extend on a rotation plane of the rotating member and communicate with an external environment of the shell.

[0015] As an optional implementation, the length direction of the exhaust channel is parallel to the length direction of the shell, and an air outlet of the exhaust channel is arranged on both sides of the length direction of the shell; at least one exhaust channel is away from the static contact structure, and at least one exhaust channel is close to the static contact structure.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] The embodiment of the present application provides a contact assembly, which comprises a movable contact structure and a static contact structure matched with the movable contact structure; the movable contact structure comprises a rotating piece, a mechanism linkage shaft and a movable contact body arranged on the rotating piece; the embodiment of the present application is provided with an arc-shaped slot on the rotating piece, the center of the arc-shaped slot coincides with the rotating axis of the rotating piece; the mechanism linkage shaft of the embodiment of the present application abuts one end of the arc-shaped slot and drives the rotating piece to rotate around the rotating axis; when the movable contact body and the static contact structure are separated, the movable contact body rotates around the rotating axis under the action of inertial force, so that the mechanism linkage shaft abuts the other end of the arc-shaped slot. Compared with the prior art, the separation process of the contact assembly of the embodiment of the present application has two parts of movement to form a larger dynamic opening distance. In the first part of movement of the movable contact body away from the static contact structure, the rotating angle of the movable contact body is consistent with the rotating angle of the mechanism linkage shaft. In the second part of movement of the movable contact body away from the static contact structure, the idle stroke formed by the arc-shaped slot enables the movable contact body to continue to move away from the static contact structure under the action of inertial force, thereby increasing the maximum distance between the movable contact structure and the static contact structure during separation and improving the arc breaking capacity.

[0018] The embodiment of the present application provides a low-voltage switch, which comprises a shell, the above-mentioned contact assembly and a hybrid arc-extinguishing chamber; the hybrid arc-extinguishing chamber comprises a grid arc-extinguishing assembly and a magnetic arc-extinguishing assembly arranged along the movement path of the movable contact body of the contact assembly, and is used for extinguishing the arc generated by the contact assembly in the shell. The low-voltage switch provided by the embodiment of the present application comprises the above-mentioned contact assembly, and the structure of the hybrid arc-extinguishing chamber can greatly improve the arc-extinguishing capacity of the low-voltage switch, so that the low-voltage switch can meet higher voltage arc-extinguishing requirements without increasing the volume of the low-voltage switch. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 The structure diagram of the static contact structure of the embodiment of the present application close to the grid arc-extinguishing assembly;

[0021] Figure 2 The structure diagram of the static contact structure of the embodiment of the present application close to the magnetic arc-extinguishing assembly

[0022] Figure 3 The structure diagram of the contact assembly of the embodiment of the present application;

[0023] Figure 4 The structure diagram of the contact assembly of the embodiment of the present application;

[0024] Figure 5 Figure 3 is a structural schematic diagram of a contact assembly according to an embodiment of the present application;

[0025] Figure 6 Figure 4 is a structural schematic diagram of a low-voltage switch according to an embodiment of the present application;

[0026] Figure 7 Figure 5 is a structural schematic diagram of a low-voltage switch according to an embodiment of the present application;

[0027] Figure 8 Figure 6 is a structural schematic diagram of a low-voltage switch according to an embodiment of the present application.

[0028] Figure 100 - contact assembly; 101 - movable contact structure; 102 - fixed contact structure; 103 - rotating member; 104 - mechanism linkage shaft; 105 - movable contact body; 106 - arc-shaped slot; 107 - rotating axis; 108 - low-voltage switch; 109 - housing; 110 - hybrid arc-extinguishing chamber; 111 - grid arc-extinguishing assembly; 112 - magnetic arc-extinguishing assembly; 113 - L-shaped structure; 114 - exhaust passage; 115 - length direction; 116 - gas outlet. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of protection of the present application.

[0031] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "first", "second", "third" and the like are only used to distinguish description, and cannot be understood as indicating or implying relative importance.

[0032] In the description of the application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0033] The conventional low-voltage switch generally adopts the arc extinguishing chamber structure composed of multiple grid plates arranged in parallel or in a radial manner to extinguish the arc. At present, the number of grid plates is generally increased to improve the arc breaking voltage and improve the arc extinguishing capacity of the low-voltage switch, so that the low-voltage switch can meet higher voltage arc extinguishing requirements. However, due to the small size of the low-voltage switch, the internal space of the switch housing is limited, so increasing the number of grid plates or increasing the extension length of the moving contact structure to improve the arc breaking capacity will be limited by the size of the low-voltage switch.

[0034] The moving contact of the contact assembly in the prior art is generally driven by a rotating member, and the rotation angle of the driving shaft is equal to the rotation angle of the moving contact, so that the opening distance of the moving contact and the stationary contact is limited, and the opening distance between the moving contact and the stationary contact cannot be further lengthened, resulting in that the arc extinguishing capacity of the low-voltage switch cannot be further improved.

[0035] To solve the above technical problems, the embodiment of the application provides a contact assembly 100 and a low-voltage switch 108.

[0036] Referring to FIGS. 1 to 3, Figure 1 , Figure 2 and Figure 3 The embodiment of the application provides a contact assembly 100, which comprises a moving contact structure 101 and a stationary contact structure 102 arranged in cooperation with the moving contact structure 101; the moving contact structure 101 comprises a rotating member 103, a mechanism linkage shaft 104 and a moving contact body 105 arranged on the rotating member 103; an arc-shaped groove 106 is arranged on the rotating member 103, and the center of the arc-shaped groove 106 coincides with the rotation axis 107 of the rotating member 103; the mechanism linkage shaft 104 abuts one end of the arc-shaped groove 106 and drives the rotating member 103 to rotate around the rotation axis 107; the moving contact body 105 is opened from the stationary contact structure 102, the rotating member 103 rotates around the rotation axis 107 under the action of the inertial force, and the mechanism linkage shaft 104 abuts the other end of the arc-shaped groove 106.

[0037] It should be noted that the movable contact body 105 is fixedly installed on the rotating member 103 and extends away from the rotating axis 107 in the radial direction of the rotating member 103. The mechanism linkage shaft 104 abuts against one end of the arc-shaped slot 106 and drives the rotating member 103 to rotate, so that the arc-shaped slot 106 can form an idle stroke in the opposite direction of the rotating direction. When the rotating member 103 needs to rotate in the opposite direction, the mechanism linkage shaft 104 first rotates to abut against the other end of the arc-shaped slot 106, and then drives the rotating member 103 to rotate to a preset rotating angle. Due to the idle stroke of the arc-shaped slot 106, the rotating member 103 and the movable contact body 105 can continue to rotate under the action of the inertial force, so as to increase the opening distance of the breaking and improve the arc breaking capacity without affecting the volume of the low-voltage electrical apparatus.

[0038] The specific structure of the stationary contact structure 102 can be selected by those skilled in the art as needed.

[0039] The contact assembly 100 provided in the embodiment of the application includes a movable contact structure 101 and a stationary contact structure 102 arranged in cooperation with the movable contact structure 101. The movable contact structure 101 includes a rotating member 103, a mechanism linkage shaft 104, and a movable contact body 105 arranged on the rotating member 103. The embodiment of the application is provided with an arc-shaped slot 106 on the rotating member 103, and the center of the arc-shaped slot 106 coincides with the rotating axis 107 of the rotating member 103. The mechanism linkage shaft 104 of the embodiment of the application abuts against one end of the arc-shaped slot 106 and drives the rotating member 103 to rotate around the rotating axis 107. When the movable contact body 105 breaks away from the stationary contact structure 102, the mechanism linkage shaft 104 first moves to abut against the other end of the arc-shaped slot 106, and then drives the rotating member 103 to rotate to a preset rotating angle. Due to the idle stroke of the arc-shaped slot 106 in the opposite direction of the rotating direction, the movable contact body 105 continues to rotate around the rotating axis 107 under the action of the inertial force, so as to increase the opening distance of the breaking. Compared with the prior art, the breaking process of the contact assembly 100 of the embodiment of the application has two parts of movement to form a larger dynamic opening distance. In the first part of movement of the movable contact body 105 away from the stationary contact structure 102, the rotating angle of the movable contact body 105 is consistent with the rotating angle of the mechanism linkage shaft 104. In the second part of movement of the movable contact body 105 away from the stationary contact structure 102, the idle stroke formed by the arc-shaped slot 106 enables the movable contact body 105 to continue to move away from the stationary contact structure 102 under the action of the inertial force, so as to increase the maximum distance between the movable contact structure 101 and the stationary contact structure 102 in the breaking and improve the arc breaking capacity.

[0040] Reference Figure 3 , Figure 4 and Figure 5As an optional embodiment, the extending direction of the mechanism linkage shaft 104 is perpendicular to the rotating plane of the rotating member 103. As shown in Figure 4 As shown in the figure, the mechanism linkage shaft 104 is located at one end of the arc-shaped slot 106. As shown in Figure 5 As shown in the figure, the mechanism linkage shaft 104 is located at the other end of the arc-shaped slot 106.

[0041] Further, the embodiment of the present application discloses a specific setting mode of the mechanism linkage shaft 104. The embodiment of the present application sets the extending direction of the mechanism linkage shaft 104 perpendicular to the rotating plane of the rotating member 103, so that the mechanism linkage shaft 104 can reliably and stably drive the rotating member 103 to rotate. The rotating of the rotating member 103 is driven by the rotating of the mechanism linkage shaft 104, which is convenient for operation.

[0042] For example, the maximum rotation angle of the movable contact body 105 and the static contact structure 102 during closing is 90°. For example, the maximum rotation angle of the movable contact body 105 and the static contact structure 102 during opening is 150°. Preferably, the maximum rotation angle of the movable contact body 105 and the static contact structure 102 during closing is 80°. The maximum rotation angle of the movable contact body 105 and the static contact structure 102 during opening is 120°.

[0043] As an optional embodiment, there are at least two arc-shaped slots 106, and the at least two arc-shaped slots 106 are distributed at intervals around the rotating axis 107.

[0044] The embodiment of the present application can insert multiple mechanism linkage shafts 104 into the arc-shaped slots 106 by increasing the number of arc-shaped slots 106, so that the mechanism linkage shaft 104 can reliably drive the rotating member 103 to rotate, and provide sufficient driving force to the rotating member 103, so as to make the movable contact body 105 obtain a larger inertial force. It should be noted that the number of arc-shaped slots 106 can be set by those skilled in the art as needed. For example, the arc-shaped slots 106 are two and uniformly distributed around the rotating axis 107. For example, the arc-shaped slots 106 are three and uniformly distributed around the rotating axis 107.

[0045] As shown in Figure 6 As shown in Figure 8 As shown in the figure, the embodiment of the present application provides a low-voltage switch 108, which comprises a housing 109, the above-mentioned contact assembly 100 and a hybrid arc-extinguishing chamber 110; the hybrid arc-extinguishing chamber 110 comprises a grid arc-extinguishing assembly 111 and a magnetic arc-extinguishing assembly 112 arranged along the movement path of the movable contact body 105 of the contact assembly 100, and is used for extinguishing the arc generated by the contact assembly 100 in the housing 109.

[0046] The embodiment of the present application provides a low-voltage switch 108, which comprises a shell 109, the above-mentioned contact assembly 100 and a hybrid arc-extinguishing chamber 110; the hybrid arc-extinguishing chamber 110 comprises a grid arc-extinguishing assembly 111 and a magnetic arc-extinguishing assembly 112 arranged along the movement path of the movable contact body 105 of the contact assembly 100, and is used for extinguishing the arc generated by the contact assembly 100 in the shell 109. The low-voltage switch 108 provided by the embodiment of the present application comprises the above-mentioned contact assembly 100, and the arc-extinguishing capacity of the low-voltage switch 108 can be greatly improved in combination with the structure of the hybrid arc-extinguishing chamber 110, so that the low-voltage switch 108 can meet higher voltage arc-extinguishing requirements without increasing the volume of the low-voltage switch 108.

[0047] Referring to Figure 6 As an optional embodiment, two movable contact bodies 105 are symmetrically arranged on the rotating piece 103; and two hybrid arc-extinguishing chambers 110 are arranged on the two sides of the rotating piece 103 and correspond to the two movable contact bodies 105.

[0048] The embodiment of the present application discloses that two movable contact bodies 105 are symmetrically arranged on the rotating piece 103, and two hybrid arc-extinguishing chambers 110 are correspondingly arranged, so as to form a double-break low-voltage switch 108.

[0049] Referring to Figure 6 As an optional embodiment, the hybrid arc-extinguishing chamber 110 is projected as an L-shaped structure 113 on the rotation plane of the rotating piece 103; the shell 109 has a rectangular cavity, the rotating piece 103 is arranged in the middle of the rectangular cavity, and the two L-shaped structures 113 are arranged at two non-adjacent corners of the rectangular cavity.

[0050] Further, the embodiment of the present application specifically discloses a specific layout of a double-break low-voltage switch 108. The structure layout of the double-break low-voltage switch 108 provided by the embodiment of the present application is compact, so that the internal space of the shell 109 can be fully utilized, and the volume of the entire low-voltage switch 108 can be reduced. In addition, the double-break low-voltage switch 108 provided by the embodiment of the present application adopts the above-mentioned contact assembly 100, and a larger opening distance can be generated between the movable contact body 105 and the static contact structure 102 through the above-mentioned contact assembly 100, so that the arc extinguishing capacity of the double-break low-voltage switch 108 is improved. Further, the double-break low-voltage switch 108 in the embodiment of the present application adopts the hybrid arc-extinguishing chamber 110, and the hybrid arc-extinguishing chamber 110 comprises the grid arc-extinguishing assembly 111 and the magnetic arc-extinguishing assembly 112 arranged along the movement path of the movable contact body 105 of the contact assembly 100, so that the arc breaking capacity of the double-break low-voltage switch 108 can be further improved. That is to say, the double-break low-voltage switch 108 provided by the embodiment of the present application can greatly improve the arc breaking capacity of the switch without increasing the volume of the entire switch.

[0051] wherein, referring to Figure 1 and Figure 2 As shown in the figure, the moving contact body 105 is sequentially switched off through the grid piece arc extinguishing assembly 111 and the magnetic arc extinguishing assembly 112. Or, the moving contact body 105 is sequentially switched off through the magnetic arc extinguishing assembly 112 and the grid piece arc extinguishing assembly 111.

[0052] Referring to Figure 6 and Figure 7 As shown in the figure, as an optional embodiment, the shell 109 is provided with exhaust passages 114 on both sides of the hybrid arc extinguishing chamber 110, the exhaust passages 114 extend in the rotation plane of the rotating member 103 and communicate with the external environment of the shell 109.

[0053] Specifically, the exhaust passages 114 are parallel to the length direction 115 of the shell 109, and the gas outlets 116 of the exhaust passages 114 are arranged on both sides of the length direction 115 of the shell 109. It should be noted that the embodiment of the present application is provided with exhaust passages 114 on both sides of the two hybrid arc extinguishing chambers 110, the high-temperature gas generated in the low-voltage switch 108 is discharged through the exhaust passages 114, and one exhaust passage 114 is away from the static contact structure 102, and one exhaust passage 114 is close to the static contact structure 102.

[0054] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A contact assembly (100), characterized in that, The system includes a moving contact structure (101) and a stationary contact structure (102) that cooperates with the moving contact structure (101); the moving contact structure (101) includes a rotating member (103), a mechanism linkage shaft (104), and a moving contact body (105) disposed on the rotating member (103); the rotating member (103) is provided with an arc-shaped groove (106), the center of which coincides with the rotation axis (107) of the rotating member (103); the mechanism linkage shaft (105) is provided with an arc-shaped groove (106), the center of which coincides with the rotation axis (107) of the rotating member (103); the mechanism linkage shaft (102) is provided with a moving contact structure (103) and a stationary contact structure (102) that cooperates with the moving contact structure (102); the moving contact structure (103) includes a rotating member (103), a mechanism linkage shaft (104), and a stationary contact body (105) disposed on the rotating member (103); the rotating member (103) is provided with an arc-shaped groove (106), the center of which coincides with the rotation axis (107) of the rotating member (103); the mechanism linkage shaft (102) is provided with an arc-shaped groove (106), the center of which coincides with the rotation axis (107) of the rotating member (103); the moving contact structure (102) includes a rotating member (103), a stationary contact structure (102) that cooperates with the moving contact structure (101); the moving contact structure (103) includes a rotating member (103), a mechanism linkage shaft (104), and a stationary contact body (105) disposed on the rotating member (103 ... 04) It abuts against one end of the arc groove (106) and moves the rotating part (103) to rotate around the rotation axis (107); the moving contact body (105) and the stationary contact structure (102) are disconnected, the mechanism linkage shaft (104) first moves to abut against the other end of the arc groove (106), and then the mechanism linkage shaft (104) drives the rotating part (103) to rotate to the preset rotation angle, and the rotating part (103) rotates around the rotation axis (107) under the action of inertial force.

2. The contact assembly (100) according to claim 1, characterized in that, The extension direction of the linkage shaft (104) is perpendicular to the rotation plane of the rotating component (103).

3. The contact assembly (100) according to claim 1, characterized in that, The maximum angle at which the moving contact body (105) and the stationary contact structure (102) close is 90°; and / or, the maximum angle at which the moving contact body (105) and the stationary contact structure (102) open is 150°.

4. The contact assembly (100) according to any one of claims 1-3, characterized in that, There are at least two of the arc-shaped grooves (106), and the at least two of the arc-shaped grooves (106) are distributed at intervals with the rotation axis (107) as the center.

5. A low-voltage switch (108), characterized in that, The device includes a housing (109), a contact assembly (100) as described in any one of claims 1-4, and a hybrid arc-extinguishing chamber (110); the hybrid arc-extinguishing chamber (110) includes a grid arc-extinguishing assembly (111) and a magnetic arc-extinguishing assembly (112) arranged along the movement path of the moving contact body (105) of the contact assembly (100), for extinguishing the arc generated by the contact assembly (100) within the housing (109).

6. The low-voltage switch (108) according to claim 5, characterized in that, There are two moving contact bodies (105) symmetrically arranged on the rotating member (103); there are two hybrid arc-extinguishing chambers (110) arranged on both sides of the rotating member (103) and corresponding one-to-one with the two moving contact bodies (105).

7. The low-voltage switch (108) according to claim 6, characterized in that, The hybrid arc-extinguishing chamber (110) is projected as an L-shaped structure (113) on the rotation plane of the rotating member (103); the housing (109) has a rectangular cavity, the rotating member (103) is located in the middle of the rectangular cavity, and the two L-shaped structures (113) are respectively located at two non-adjacent corners of the rectangular cavity.

8. The low-voltage switch (108) according to claim 5 or 6, characterized in that, The moving contact body (105) is opened by passing through the grid arc extinguishing assembly (111) and the magnetic arc extinguishing assembly (112) in sequence; or, the moving contact body (105) is opened by passing through the magnetic arc extinguishing assembly (112) and the grid arc extinguishing assembly (111) in sequence.

9. The low-voltage switch (108) according to any one of claims 5-7, characterized in that, The housing (109) has exhaust channels (114) on both sides of the hybrid arc-extinguishing chamber (110). The exhaust channels (114) extend on the rotation plane of the rotating component (103) and communicate with the external environment of the housing (109).

10. The low-voltage switch (108) according to claim 9, characterized in that, The exhaust channel (114) is parallel to the length direction (115) of the housing (109), and the exhaust outlet (116) of the exhaust channel (114) is located on both sides of the length direction (115) of the housing (109); at least one of the exhaust channels (114) is away from the stationary contact structure (102), and at least one of the exhaust channels (114) is close to the stationary contact structure (102).

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