Load switch and electricity meter

Abstract

The invention relates to the technical field of low-voltage electric appliances, and particularly discloses a load switch and an ammeter, and the load switch comprises a moving contact assembly, a static contact assembly, and an electromagnetic drive assembly. One end of the moving contact rod is connected with an arranged rotating assembly, and the other end of the moving contact rod is provided with a moving contact which can abut against and make contact with the static contact assembly. And the electromagnetic driving assembly is arranged on one side of the extension direction of the moving contact rod, and is used for driving the moving contact rod to move around the rotating axis of the rotating assembly, so that the moving contact is in contact with or separated from the static contact assembly. According to the invention, the moving contact assembly and the static contact assembly have large closing contact force, and the short-circuit resistance of the product is improved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a load switch and an electric meter. Background Art

[0002] Load switches are commonly used in automated control circuits. They are "automatic switches" that use small currents to control large current operations. When evaluating low-voltage load switches, short-circuit withstand capability is one of the evaluation indicators. This refers to the ability of the low-voltage switch to withstand the thermal shock and repulsive shock of the short-circuit current within a certain period of time after the short-circuit current flows through it. Due to the poor stability of the moving contact assembly's motion structure, the existing low-voltage switches have low contact pressure when the moving contact and static contact are closed, resulting in poor short-circuit withstand capability of the load switch, and ultimately poor stability of the load switch. In addition, the contact assemblies of existing products generally have a relatively small opening distance and poor dielectric properties, resulting in low breaking and short-circuit withstand performance indicators. Summary of the Invention

[0003] The purpose of this application is to provide a load switch and an electric meter, which can enable the moving contact assembly and the static contact assembly to have a larger closing contact force and a larger opening distance, thereby improving the short-circuit withstand capability and dielectric properties of the product.

[0004] The embodiment of the present application is implemented as follows:

[0005] In the first aspect, an embodiment of the present application provides a load switch, comprising a moving contact assembly, a static contact assembly and an electromagnetic drive assembly, wherein the moving contact assembly comprises a moving contact rod, one end of the moving contact rod is connected to a set rotating assembly, and the other end is provided with a moving contact that can be in contact with the static contact assembly; the electromagnetic drive assembly is arranged on one side of the extension direction of the moving contact rod, and is used to drive the moving contact rod to move around the rotation axis of the rotating assembly so that the moving contact is in contact with or separated from the static contact assembly; the opening direction of the moving contact assembly and the static contact assembly is consistent with the driving direction of the electromagnetic drive assembly.

[0006] As an optional embodiment, there are a plurality of movable contact rods spaced apart along the rotation axis; the plurality of movable contact rods are connected in series or in parallel via a conductive structure.

[0007] As an optional embodiment, the electromagnetic drive system includes a drive rod, one end of which is connected to the moving contact rod through an elastic member. When the drive rod pushes the moving contact to contact the static contact assembly, the elastic member can generate an elastic force that drives the moving contact to resist the static contact assembly.

[0008] As an optional embodiment, the moving contact assembly further includes a moving contact bracket, which is arranged at the end of the driving rod. The moving contact rod is passed through the moving contact bracket and is connected to the moving contact bracket via the elastic member.

[0009] As an optional implementation, the elastic member is a torsion spring, the torsion arm at the first end of the torsion spring abuts against the moving contact rod, and the torsion arm at the second end abuts against the moving contact bracket.

[0010] As an optional embodiment, the rotating assembly has a rotating shaft passing through the moving contact rod, the torsion spring is sleeved on the rotating shaft, and the rotating axis of the moving contact rod is consistent with that of the torsion spring.

[0011] As an optional embodiment, it further includes a busbar and a flexible connection connecting the busbar and the moving contact rod, and the busbar is arranged at the end of the rotating assembly close to the moving contact rod.

[0012] As an optional implementation, at least part of the busbar and the flexible connection extends in the opening direction of the moving contact rod.

[0013] As an optional embodiment, at least one connecting ear is provided at one end of the moving contact rod close to the rotation axis, and the connecting ear has a through hole hinged to the rotating assembly.

[0014] As an optional implementation, a first magnetizing block close to the static contact assembly is fixed to one side of the moving contact rod in the extending direction.

[0015] As an optional implementation, a second magnetization block is correspondingly provided on the side of the moving contact rod facing away from the first magnetization block, and the moving contact rod can drive the second magnetization block to engage with the first magnetization block.

[0016] As an optional implementation, a static contact capable of contacting the moving contact is provided on one side of the static contact assembly, and a third magnetizing block is provided on a side of the static contact assembly facing away from the static contact.

[0017] As an optional embodiment, it also includes an arc extinguishing assembly, and the moving contact rod is provided with a bending portion extending toward one side of the arc extinguishing assembly, and the moving contact is arranged on the surface of the bending portion close to the side of the static contact assembly; the bending portion and the static contact assembly can form an opening toward the arc extinguishing assembly.

[0018] As an optional embodiment, the arc extinguishing assembly includes an arc extinguishing chamber, and the arc extinguishing chamber is provided with an arc guide structure and an air outlet in sequence in the direction away from the opening. The arc formed by the bending portion and the static contact assembly opening can pass through the arc guide structure and then be discharged from the air outlet.

[0019] In a second aspect, the present application also provides an electric meter, comprising a transformer and the above-mentioned load switch, wherein the transformer is connected to a busbar external to the load switch.

[0020] The beneficial effects of the embodiments of the present application include:

[0021] The embodiment of the present application provides a load switch, including a moving contact assembly, a static contact assembly, and an electromagnetic drive assembly. The moving contact assembly includes a moving contact rod. One end of the moving contact rod of the embodiment of the present application is connected to a rotating assembly, and the other end is provided with a moving contact that can be in contact with the static contact assembly. The electromagnetic drive assembly is provided on one side of the extension direction of the moving contact rod. The embodiment of the present application can drive the moving contact rod to move around the rotation axis of the rotating assembly through the electromagnetic drive assembly, so that the moving contact contacts or separates from the static contact assembly. Compared with the prior art, the embodiment of the present application can enhance the stability of the moving contact movement structure, increase the contact pressure of the low-voltage switch, and enhance the short-circuit withstand capability of the load switch. In addition, the moving contact rod provided in the embodiment of the present application is provided with a moving contact only at one end, which is conducive to reducing the number of contacts, reducing manufacturing costs, and reducing the internal resistance of the main circuit.

[0022] The present application also provides an electric meter comprising a transformer and the aforementioned load switch, wherein the transformer is connected to a busbar external to the load switch. The electric meter in the present application utilizes the aforementioned load switch. Compared to the prior art, the load switch provided in the present application has superior contact performance, which can improve the load switch's short-circuit withstand capability and enable the load switch to operate stably within the electric meter. Furthermore, the present application effectively reduces manufacturing costs by reducing the number of moving and stationary contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is one of the structural diagrams of the load switch according to the embodiment of the present application;

[0025] Figure 2 This is the second structural diagram of the load switch according to the embodiment of the present application;

[0026] Figure 3 This is the third structural diagram of the load switch according to the embodiment of the present application;

[0027] Figure 4 This is the fourth structural diagram of the load switch according to the embodiment of the present application.

[0028] Icons: 100-load switch; 101-moving contact assembly; 102-static contact assembly; 103-electromagnetic drive assembly; 104-moving contact rod; 105-rotating assembly; 106-moving contact; 107-driving rod; 108-moving contact bracket; 109-torsion spring; 110-torsion arm; 111-rotating shaft; 112-wiring busbar; 113-flexible connection; 114-connecting ear; 115-first magnetizing block; 116-second magnetizing block; 117-arc extinguishing assembly; 118-bending part; 119-arc guide structure. DETAILED DESCRIPTION

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, 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 accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application 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 or explained in subsequent drawings. In addition, the terms "first," "second," "third," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0032] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0033] Load switches 100 are commonly used in automated control circuits and are "automatic switches" that use low currents to control high currents. When evaluating low-voltage load switches 100, short-circuit withstand capability is one of the evaluation indicators. This refers to the ability of the low-voltage switch to withstand the thermal shock and repulsive force of a short-circuit current for a certain period of time after a short-circuit current flows through it. Due to the poor stability of the moving structure of the moving contact assembly 101, existing low-voltage switches have low contact pressure when the moving contact 106 and the static contact are closed. This results in poor short-circuit withstand capability of the load switch 100, and ultimately poor stability of the load switch 100.

[0034] To solve the above technical problems, an embodiment of the present application provides a load switch 100 and an electric meter 120 .

[0035] Reference Figure 1 、 Figure 2 as well as Figure 3 As shown, an embodiment of the present application provides a load switch 100, including a moving contact assembly 101, a static contact assembly 102 and an electromagnetic drive assembly 103. The moving contact assembly 101 includes a moving contact rod 104, one end of which is connected to a rotating assembly 105, and the other end is provided with a moving contact 106 that can be in contact with the static contact assembly 102; the electromagnetic drive assembly 103 is arranged on one side of the extension direction of the moving contact rod 104, and is used to drive the moving contact rod 104 to move around the rotation axis of the rotating assembly 105, so that the moving contact 106 contacts or separates from the static contact assembly 102.

[0036] The opening direction of the moving contact assembly 101 and the static contact assembly 102 is consistent with the driving direction of the electromagnetic driving assembly 103 .

[0037] It should be noted that in the prior art, movable contacts 106 are typically provided at both ends of the movable contact rod 104. The electromagnetic drive assembly 103 drives the movable contact rod 104, causing the movable contacts 106 at both ends of the movable contact rod 104 to perform opening and closing operations. In the present embodiment, a rotating assembly 105 is provided at one end of the movable contact rod 104. When driven by the electromagnetic drive assembly 103, the other end of the movable contact rod 104 rotates, thereby achieving rotational engagement of the movable contact 106 with the static contact.

[0038] The present embodiment provides a load switch 100, comprising a moving contact assembly 101, a stationary contact assembly 102, and an electromagnetic drive assembly 103. The moving contact assembly 101 includes a moving contact rod 104. In the present embodiment, the moving contact rod 104 is connected to a rotating assembly 105 at one end and has a moving contact 106 at the other end, which is capable of abutting against the stationary contact assembly 102. The electromagnetic drive assembly 103 is disposed on one side of the extending direction of the moving contact rod 104. In the present embodiment, the electromagnetic drive assembly 103 is capable of driving the moving contact rod 104 to move about a rotation axis 111 of the rotating assembly 105, causing the moving contact 106 to contact or separate from the stationary contact assembly 102. Compared to the prior art, the present embodiment enhances the stability of the moving contact structure, increases the contact pressure of the low-voltage switch, and improves the short-circuit withstand capability of the load switch 100. Furthermore, the moving contact 106 is disposed at only one end of the moving contact rod 104, which helps reduce the number of contacts and thus lowers manufacturing costs.

[0039] The movable contact assembly 101 provided in the embodiment of the present application achieves a larger opening distance of the movable contact 106 through a smaller driving stroke of the electromagnetic drive assembly 103, and the opening distance of the movable contact 106 can be increased by the movable contact rod 104. By increasing the closing opening distance, the embodiment of the present application provides the load switch with better dielectric properties, which facilitates arc interruption.

[0040] In addition, since the driving stroke of the electromagnetic driving component 103 is small, it can occupy a smaller installation space, making the structural layout of the product more compact.

[0041] Reference Figure 2 and Figure 4 As shown, as an optional embodiment, there are a plurality of movable contact rods 104 spaced apart along the rotation axis; the plurality of movable contact rods 104 are connected in series or in parallel via a conductive structure.

[0042] Furthermore, the embodiment of the present application provides a plurality of movable contact rods 104, which are arranged at intervals along the rotation axis. The plurality of movable contact rods 104 can be arranged in series or in parallel via a conductive structure. Those skilled in the art can make these arrangements as needed.

[0043] In the embodiment of the present application, the multiple moving contact rods 104 are provided to enable the moving contact assembly 101 to carry a larger current, thereby reducing the repulsive force on a single moving contact rod 104 and improving the short-circuit resistance stability of the moving contact rod 104 .

[0044] Connecting multiple movable contact rods 104 in parallel can shun current, reducing the current at the movable contact point 106. Compared to a single movable contact rod 104, multiple movable contact rods 104 increase the heat dissipation area, which helps improve the thermal stability of the movable contact rods 104 and prevents excessive temperatures of the movable contact rods 104. Furthermore, by connecting them in parallel, each movable contact rod 104 carries a portion of the current, which exponentially reduces the repulsive force between the movable contact rods 104 and the static contact assembly 102, facilitating stable contact between the movable and static contacts.

[0045] Among them, multiple moving contact rods 104 are arranged in series, so that the entire current loop forms multiple breakpoints. Compared with a single breakpoint, the moving contact opening distance is multiplied, the dielectric performance is significantly improved, and at the same time the arc is divided into multiple sections, the total arc voltage is increased, and the arc extinguishing effect can be significantly improved.

[0046] Reference Figure 1 、 Figure 2 and Figure 4 As shown, as an optional embodiment, the electromagnetic drive system includes a drive rod 107 whose extension direction intersects with the extension direction of the moving contact rod 104, and the moving contact assembly 101 also includes a moving contact bracket 108. The moving contact bracket 108 is arranged at the end of the drive rod 107, and the moving contact rod 104 is passed through the moving contact bracket 108, and the moving contact rod 104 and the moving contact bracket 108 are connected by an elastic member. When the drive rod 107 pushes the moving contact 106 to contact the static contact assembly 102, the elastic member can generate an elastic force to drive the moving contact 106 to resist the static contact assembly 102.

[0047] Furthermore, in the embodiment of the present application, an elastic member is provided on the moving contact rod 104. Through the provision of the elastic member, the moving contact 106 and the static contact assembly 102 can be elastically abutted against each other, so that the closing and pressing state of the moving contact rod 104 and the static contact assembly 102 is tighter, ensuring that the contact state of the moving contact 106 and the static contact assembly 102 is more stable.

[0048] The provision of the elastic member ensures that when the short-circuit current passes through the movable contact rod 104 and the static contact assembly 102 , the contact assembly can maintain stable contact, thereby improving the ability to resist the repulsive impact and thermal shock of the short-circuit current.

[0049] Reference Figure 1 、 Figure 2 and Figure 4 As shown, the elastic member is a torsion spring 109. The torsion arm 110 at the first end of the torsion spring 109 abuts against the movable contact rod 104, and the torsion arm 110 at the second end abuts against the movable contact bracket 108. The rotating assembly 105 has a rotating shaft 111 that passes through the movable contact rod 104. The torsion spring 109 is sleeved on the rotating shaft 111. The movable contact rod 104 and the rotating shaft 111 of the torsion spring 109 are aligned.

[0050] It should be noted that the torsion spring 109 may not be sleeved on the rotating shaft 111 , that is, the rotating axes of the moving contact rod 104 and the torsion spring 109 may not be consistent.

[0051] In the embodiment of the present application, the torsion spring 109 is sleeved on the rotating shaft 111 to ensure that the torsion spring 109 can be reliably and stably installed, thereby achieving a reliable and stable elastic connection between the moving contact rod 104 and the moving contact bracket 108 .

[0052] It should be noted that the elastic member may also be a compression spring, one end of which is arranged on the moving contact rod and the other end of which is arranged on the moving contact bracket 108 .

[0053] Reference Figure 3 and Figure 4 As shown, as an optional embodiment, it also includes a busbar 112 and a flexible connection 113 connecting the busbar 112 and the moving contact rod 104 . The busbar 112 is close to the moving contact rod 104 and the end of the rotating assembly 105 is set.

[0054] At least a portion of the busbar 112 and the flexible connector 113 of the embodiment of the present application extends in the opening direction of the movable contact rod 104. When the busbar 112 and the flexible connector 113 are energized, an electromagnetic force is generated on the movable contact rod 104, causing the movable contact 106 to approach the stationary contact assembly 102.

[0055] The embodiment of the present application enables the magnetic field generated when the busbar 112 and the moving contact rod 104 are energized to form a magnetic field force acting on the end of the moving contact rod 104, so that the other end of the moving contact rod 104 can be pressed tightly against the static contact assembly 102, effectively improving the short-circuit resistance of the contact assembly.

[0056] Reference Figure 3 and Figure 4 As shown, as an optional embodiment, at least one connecting ear 114 is provided at one end of the moving contact rod 104 close to the rotation axis, and the connecting ear 114 has a through hole hinged to the rotating assembly 105.

[0057] In the embodiment of the present application, two or one connecting lugs 114 are provided at one end of the moving contact rod 104 close to the rotation axis. By providing a through hole in the connecting lug 114 , the moving contact rod 104 can be hinged to the rotating assembly 105 .

[0058] It should be noted that the connecting tab 114 can be welded to the moving contact rod 104 or can be bent to form the connecting tab 114. The specific structure of the connecting tab 114 can be configured by those skilled in the art as needed.

[0059] Reference Figure 3 and Figure 4As shown, as an optional embodiment, a first magnetizing block 115 close to the static contact assembly 102 is fixed on one side of the extending direction of the moving contact rod 104; a second magnetizing block 116 is correspondingly provided on the side of the moving contact rod 104 away from the first magnetizing block 115, and the moving contact rod 104 can drive the second magnetizing block 116 to engage with the first magnetizing block 115.

[0060] It should be noted that a certain gap may be left when the second magnetizing block 116 and the first magnetizing block 115 are attracted to each other. This, on the one hand, prevents a rigid collision between the second magnetizing block 116 and the first magnetizing block 115 during closing, and on the other hand, ensures good contact between the moving contact 106 and the static contact assembly 102. Alternatively, the second magnetizing block 116 and the first magnetizing block 115 may be directly in contact with each other as needed.

[0061] More preferably, the embodiment of the present application can effectively enhance the attraction force between the moving contact rod 104 and the static contact assembly 102 by providing the first magnetizing block 115 and the second magnetizing block 116, so that the contact force between the moving contact 106 and the static contact assembly 102 can be further enhanced.

[0062] The second magnetizing block 116 may be a U-shaped structural member, the opening of which faces the first magnetizing block 115. The U-shaped structural member is sleeved on the movable contact rod 104 and both ends of the U-shaped structural member may be in contact with the first magnetizing block 115. The first magnetizing block 115 may also be configured as a U-shaped structural member.

[0063] Furthermore, a static contact capable of contacting the movable contact 106 is provided on one side of the static contact assembly 102 , and a third magnetizing block is provided on the side of the static contact assembly 102 facing away from the static contact.

[0064] In the embodiment of the present application, the first magnetizing block 115 , the second magnetizing block 116 and the third magnetizing block are arranged to form an attractive force in the closing direction, so that the moving contact 106 and the static contact can be in stable and reliable contact.

[0065] Reference Figure 2 and Figure 3 As shown, as an optional embodiment, it also includes an arc extinguishing assembly 117, and a bending portion 118 extending toward the side of the arc extinguishing assembly 117 is provided on the moving contact rod 104, and the moving contact 106 is provided on the surface of the bending portion 118 on one side close to the static contact assembly 102; the bending portion 118 and the static contact assembly 102 can form an opening toward the arc extinguishing assembly 117.

[0066] The arc-extinguishing assembly 117 includes an arc-extinguishing chamber, which is provided with an arc guide structure 119 and an air outlet in a direction away from the opening. The arc formed when the bent portion 118 and the static contact assembly 102 are disconnected can pass through the arc guide structure 119 and be discharged through the air outlet. The provision of the arc guide structure 119 in the embodiment of the present application facilitates the cooling and deionization of high-temperature particles, ensuring that the air outlet emits a low-temperature, non-charged gas, thereby preventing damage to components on the circuit board.

[0067] The embodiment of the present application can better arrange the arc extinguishing chambers in a limited space, which is beneficial to improving the arc extinguishing performance of the load switch 100.

[0068] In a second aspect, an embodiment of the present application further provides an electric meter 120 , comprising a transformer and the aforementioned load switch 100 , wherein the transformer is connected to a busbar external to the load switch 100 .

[0069] The electric meter 120 of the present embodiment employs the aforementioned load switch 100. Compared to the prior art, the load switch 100 provided by the present embodiment has superior contact performance, which can improve the short-circuit withstand capability of the load switch 100, allowing the load switch 100 to operate stably within the electric meter 120. Furthermore, the present embodiment effectively reduces manufacturing costs by reducing the number of movable contacts 106 and stationary contacts.

[0070] In a preferred embodiment of the present application, the load switch 100 includes a moving contact assembly 101, a static contact assembly 102, and an electromagnetic drive assembly 103. The moving contact rod 104 of the present embodiment is connected to a rotating assembly 105 at one end and is provided with a moving contact 106 at the other end that can abut against the static contact assembly 102. The electromagnetic drive assembly 103 is provided on one side of the extending direction of the moving contact rod 104 and is used to drive the moving contact rod 104 to move around the rotating axis 111 of the rotating assembly 105, so that the moving contact 106 contacts or separates from the static contact assembly 102. The moving contact rod 104 is inserted into the moving contact bracket 108, and the moving contact rod 104 and the moving contact bracket 108 are connected by an elastic member. When the driving rod 107 pushes the moving contact 106 to contact the static contact assembly 102, the elastic member can generate an elastic force that drives the moving contact 106 to abut against the static contact assembly 102.

[0071] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A load switch, characterized in that: It includes a moving contact assembly, a static contact assembly and an electromagnetic drive assembly. The moving contact assembly includes a moving contact rod, one end of which is connected to a set rotating assembly, and the other end is provided with a moving contact point that can be in contact with the static contact assembly; the electromagnetic drive assembly is arranged on one side of the moving contact rod, and is used to drive the moving contact rod to move around the rotation axis of the rotating assembly to make the moving contact point contact or separate from the static contact assembly; the opening direction of the moving contact assembly and the static contact assembly is consistent with the driving direction of the electromagnetic drive assembly.

2. The load switch according to claim 1, characterized in that: There are a plurality of movable contact rods spaced apart along the rotation axis; the plurality of movable contact rods are connected in series or in parallel via a conductive structure.

3. The load switch according to claim 1 or 2, characterized in that: The electromagnetic drive system includes a drive rod, one end of which is connected to the moving contact rod through an elastic member. When the drive rod pushes the moving contact to contact the static contact assembly, the elastic member can generate an elastic force that drives the moving contact to resist the static contact assembly.

4. The load switch according to claim 3, characterized in that: The moving contact assembly further includes a moving contact bracket, which is arranged at the end of the driving rod. The moving contact rod is passed through the moving contact bracket and is connected to the moving contact bracket via the elastic member.

5. The load switch according to claim 4, characterized in that: The elastic member is a torsion spring, the torsion arm at the first end of the torsion spring abuts against the moving contact rod, and the torsion arm at the second end abuts against the moving contact bracket.

6. The load switch according to claim 5, characterized in that: The rotating assembly has a rotating shaft passing through the moving contact rod, the torsion spring is sleeved on the rotating shaft, and the rotating axis of the moving contact rod is consistent with that of the torsion spring.

7. The load switch according to claim 1 or 2, characterized in that: It also includes a wiring busbar and a soft connection connecting the wiring busbar and the moving contact rod. The wiring busbar is arranged at the end of the rotating assembly close to the moving contact rod.

8. The load switch according to claim 7, characterized in that: At least a portion of the busbar and the flexible connection extends in an opening direction of the moving contact rod.

9. The load switch according to claim 1 or 2, characterized in that: At least one connecting ear is provided at one end of the moving contact rod close to the rotation axis, and the connecting ear has a through hole hinged to the rotating assembly.

10. The load switch according to claim 1 or 2, characterized in that: A first magnetizing block close to the static contact assembly is fixed on one side of the moving contact rod in the extending direction.

11. The load switch according to claim 10, characterized in that: A second magnetization block is correspondingly provided on the side of the moving contact rod facing away from the first magnetization block, and the moving contact rod can drive the second magnetization block to be attracted to the first magnetization block.

12. The load switch according to claim 1 or 2, characterized in that: A static contact capable of contacting the moving contact is provided on one side of the static contact assembly, and a third magnetizing block is provided on the side of the static contact assembly facing away from the static contact.

13. The load switch according to claim 1 or 2, characterized in that: It also includes an arc extinguishing assembly, the moving contact rod is provided with a bending portion extending toward one side of the arc extinguishing assembly, the moving contact is arranged on the surface of the bending portion close to the side of the static contact assembly; the bending portion and the static contact assembly can form an opening toward the arc extinguishing assembly.

14. The load switch according to claim 13, characterized in that: The arc extinguishing assembly includes an arc extinguishing chamber, and the arc extinguishing chamber is sequentially provided with an arc guide structure and an air outlet in a direction away from the opening. The arc formed by the bending portion and the static contact assembly opening can pass through the arc guide structure and then be discharged from the air outlet.

15. An electric meter, characterized in that: The invention comprises a mutual inductor and a load switch according to any one of claims 1 to 14, wherein the mutual inductor is connected to a busbar external to the load switch.

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