Load switch and electricity meter

Abstract

The utility model 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 usually used in automated control circuits. They are an "automatic switch" that uses a small current to control the operation of a large current. When evaluating low-voltage load switches, short-circuit withstand capability is one of the evaluation indicators, which refers to the ability of the low-voltage switch to resist 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 structure of the moving contact assembly, the contact pressure of the existing low-voltage switch is small when the moving contact and the 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 small opening distance and poor dielectric properties, so the breaking and short-circuit withstand performance indicators are low. Utility Model Content

[0003] The purpose of the present 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 capacity 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 stationary contact assembly and an electromagnetic drive assembly, wherein the moving contact assembly comprises a moving contact rod, one end of which is connected to a rotating assembly, and the other end of which is provided with a moving contact point that can be in contact with the stationary 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 point contacts or separates from the stationary contact assembly; the opening direction of the moving contact assembly and the stationary contact assembly is consistent with the driving direction of the electromagnetic drive assembly.

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

[0007] As an optional embodiment, the electromagnetic drive assembly includes a drive rod, one end of which is connected to the moving contact rod via 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, the moving contact bracket is arranged at the end of the driving rod, the moving contact rod is penetrated by the moving contact bracket, and is connected to the moving contact bracket through the elastic member.

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

[0010] As an optional implementation, 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 implementation, 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 implementation, 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 stationary contact assembly is fixed to one side of the moving contact rod in the extending direction.

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

[0016] As an optional implementation, a static contact capable of contacting the moving contact is disposed on one side of the static contact assembly, and a third magnetizing block is disposed 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, 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 on one side close to 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 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.

[0019] In a second aspect, the implementation force of the present application further provides an electric meter, including a mutual inductor and the above-mentioned load switch, wherein the mutual inductor is connected to a busbar externally connected 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 arranged on one side of the extending direction of the moving contact rod. The embodiment of the present application can drive the moving contact rod to move around the rotating 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, improve the contact pressure of the low-voltage switch, and improve the short-circuit resistance 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, and can also reduce the internal resistance of the main circuit while reducing the manufacturing cost.

[0022] The embodiment of the present application also provides an electric meter, including a mutual inductor and the above-mentioned load switch, wherein the mutual inductor is connected to a busbar external to the load switch. The electric meter of the embodiment of the present application adopts the above-mentioned load switch. Compared with the prior art, the load switch provided by the embodiment of the present application has excellent contact performance, which can improve the short-term withstand capability of the load switch, so that the load switch can work stably in the electric meter. In addition, the embodiment of the present application can effectively reduce the manufacturing cost by reducing the number of moving contacts and static contacts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

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

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

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

[0027] Figure 4 This is the fourth structural schematic 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 portion; 119-arc guide structure. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here 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 which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field 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, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The load switch 100 is usually used in automated control circuits. It is an "automatic switch" that uses a small current to control the operation of a large current. When evaluating the low-voltage load switch 100, short-circuit withstand capability is one of the evaluation indicators, which refers to the ability of the low-voltage switch to resist 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 structure of the moving contact assembly 101, the contact pressure of the existing low-voltage switch is small when the moving contact 106 and the static contact are closed, resulting in poor short-circuit withstand capability of the load switch 100, and ultimately poor stability of the load switch 100.

[0034] In order 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 stationary contact assembly 102 and an electromagnetic drive assembly 103. The moving contact assembly 101 includes a moving contact rod 104, one end of the moving contact rod 104 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 stationary 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 is in contact with or separated from the stationary contact assembly 102.

[0036] The opening direction of the moving contact assembly 101 and the stationary 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, moving contacts 106 are usually provided at both ends of the moving contact rod 104, and the moving contacts 106 at both ends of the moving contact rod 104 are driven by the electromagnetic drive component 103 to perform opening and closing actions. In the embodiment of the present application, a rotating component 105 is provided at one end of the moving contact rod 104, so that the other end of the moving contact rod 104 can rotate when the electromagnetic drive component 103 is driven, thereby realizing the rotational engagement of the moving contact 106 with the static contact.

[0038] The embodiment of the present application provides a load switch 100, including 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. One end of the moving contact rod 104 of the embodiment of the present application is connected to a rotating assembly 105, and the other end is provided with a moving contact 106 that can contact with the stationary contact assembly 102. The electromagnetic drive assembly 103 is arranged on one side of the extending direction of the moving contact rod 104. The embodiment of the present application can drive the moving contact rod 104 to move around the rotating axis 111 of the rotating assembly 105 through the electromagnetic drive assembly 103, so that the moving contact 106 is in contact with or separated from the stationary contact assembly 102. Compared with the prior art, the embodiment of the present application can enhance the stability of the moving contact movement structure, improve the contact pressure of the low-voltage switch, and improve the short-term resistance of the load switch 100. In addition, the moving contact rod 104 provided in the embodiment of the present application is only provided with a moving contact 106 at one end, which is conducive to reducing the number of contacts and reducing the manufacturing cost.

[0039] The movable contact assembly 101 provided in the embodiment of the present application can obtain 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 enlarged through the movable contact rod 104. The embodiment of the present application increases the closing opening distance, so that the load switch has better dielectric properties, which is conducive to the breaking of the arc.

[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 arranged at intervals along the rotation axis; the plurality of movable contact rods 104 are connected in series or in parallel through 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, wherein the plurality of movable contact rods 104 can be arranged in series through a conductive structure, or can be arranged in parallel through a conductive structure. Those skilled in the art can make arrangements as needed.

[0043] In the embodiment of the present application, a plurality of moving contact rods 104 are provided so that the moving contact assembly 101 can carry a larger current, and the repulsive force on a single moving contact rod 104 is reduced, which is beneficial to improving the short-term stability of the moving contact rod 104 .

[0044] Among them, connecting multiple moving contact rods 104 in parallel can shunt the current, reduce the current at the moving contact point 106, and increase the heat dissipation area of ​​multiple moving contact rods 104 compared to a single moving contact rod 104, which is beneficial to improving the thermal stability of the moving contact rod 104 and avoiding excessive temperature of the moving contact rod 104. In addition, by setting in parallel, each moving contact rod 104 carries part of the current, so that the repulsive force between the moving contact rod 104 and the static contact assembly 102 is reduced exponentially, which is beneficial to the stable contact between the moving 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 doubled, 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 assembly 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, which is arranged at the end of the drive rod 107, and the moving contact rod 104 is penetrated by 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 that drives the moving contact 106 to resist the static contact assembly 102.

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

[0048] By disposing the elastic member, when the short-circuit current passes through the moving contact rod 104 and the stationary contact assembly 102 , the contact assembly can be in stable contact, thereby improving the ability to resist the repulsive impact and thermal impact of the short-circuit current.

[0049] Reference Figure 1 , Figure 2 and Figure 4 As shown, further, the elastic member is a torsion spring 109, a torsion arm 110 at a first end of the torsion spring 109 abuts against the moving contact rod 104, and a torsion arm 110 at a second end abuts against the moving contact bracket 108. The rotating assembly 105 has a rotating shaft 111 that penetrates the moving contact rod 104, the torsion spring 109 is sleeved on the rotating shaft 111, and the moving 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, so that the moving contact rod 104 and the moving contact bracket 108 are reliably and stably elastically connected.

[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 soft 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 arranged.

[0054] At least part of the busbar 112 and the flexible connection 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 connection 113 are energized, an electromagnetic force acting on the movable contact rod 104 can be generated, so that the movable contact 106 is close to 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 against the static contact assembly 102, effectively improving the short-circuit withstand capability of the contact assembly.

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

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

[0058] It should be noted that the connecting ear piece 114 can be welded on the moving contact rod 104, or can be a bent connecting ear piece 114. The specific structure of the connecting ear piece 114 can be set by those skilled in the art as required.

[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 attract 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, so as to avoid a rigid collision between the second magnetizing block 116 and the first magnetizing block 115 when the switch is closed, and to ensure good contact between the moving contact 106 and the static contact assembly 102. In addition, the second magnetizing block 116 and the first magnetizing block 115 may also be directly in contact 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 stationary contact assembly 102 by disposing the first magnetizing block 115 and the second magnetizing block 116, so that the contact force between the moving contact 106 and the stationary contact assembly 102 can be further enhanced.

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

[0063] Furthermore, a static contact capable of contacting the movable contact 106 is disposed on one side of the static contact assembly 102, and a third magnetizing block is disposed on the side of the static contact assembly 102 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 the moving contact rod 104 is provided with a bending portion 118 extending toward one side of the arc extinguishing assembly 117, and the moving contact 106 is arranged 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, and an arc guide structure 119 and an air outlet are sequentially arranged in the direction away from the opening of the arc extinguishing chamber. The arc formed by the bending portion 118 and the static contact assembly 102 can pass through the arc guide structure 119 and then be discharged from the air outlet. The embodiment of the present application is conducive to the cooling and deionization of high-temperature particles through the arrangement of the arc guide structure 119, ensuring that the gas discharged from the air outlet is not high in temperature and is not charged, thereby preventing the components on the circuit board from being burned.

[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 , including a transformer and the above-mentioned load switch 100 , wherein the transformer is connected to a busbar external to the load switch 100 .

[0069] The electric meter 120 of the embodiment of the present application adopts the above-mentioned load switch 100. Compared with the prior art, the load switch 100 provided in the embodiment of the present application has excellent contact performance, which can improve the short-term withstand capability of the load switch 100, so that the load switch 100 can work stably in the electric meter 120. In addition, the embodiment of the present application can effectively reduce the manufacturing cost by reducing the number of moving contacts 106 and static contacts.

[0070] In a preferred embodiment of the present application, the load switch 100 comprises a moving contact assembly 101, a stationary contact assembly 102 and an electromagnetic drive assembly 103, wherein one end of the moving contact rod 104 of the present application embodiment is connected to the rotating assembly 105, and the other end is provided with a moving contact 106 that can abut against the stationary contact assembly 102; the electromagnetic drive assembly 103 is arranged 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 is in contact with or separated from the stationary contact assembly 102. The moving contact rod 104 is inserted into the moving contact bracket 108, and the moving contact rod 104 is connected to the moving contact bracket 108 through an elastic member. When the driving rod 107 pushes the moving contact 106 to contact the stationary contact assembly 102, the elastic member can generate an elastic force that drives the moving contact 106 to abut against the stationary contact assembly 102.

[0071] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 load switch, characterized in that: It includes a moving contact assembly, a stationary contact assembly and an electromagnetic drive assembly, wherein the moving contact assembly includes a moving contact rod, one end of which is connected to a rotating assembly, and the other end of which is provided with a moving contact point that can abut against the stationary 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 rotating axis of the rotating assembly so that the moving contact point contacts or separates from the stationary contact assembly; the opening direction of the moving contact assembly and the stationary 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 arranged at intervals 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 driving assembly includes a driving rod, one end of which is connected to the moving contact rod through an elastic member. When the driving 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 comprises a moving contact bracket, wherein the moving contact bracket is arranged at the end of the driving rod, the moving contact rod is penetrated through the moving contact bracket, and is connected to the moving contact bracket through the elastic member.

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

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

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 part of the busbar and the flexible connection extends in the 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 stationary 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 magnetizing block is correspondingly arranged on a side of the moving contact rod away from the first magnetizing block, and the moving contact rod can drive the second magnetizing block to be attracted to the first magnetizing block.

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

13. The load switch according to claim 1 or 2, characterized in that: It also includes an arc extinguishing assembly, wherein 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 a surface of the bending portion close to one side of the stationary contact assembly; the bending portion and the stationary 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 provided with an arc guide structure and an air outlet in sequence 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: It comprises a mutual inductor and the 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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