Electric load switch

Abstract

The invention provides an electric load switch which at least comprises an insulating shell, and elements in the insulating shell at least comprise a motor assembly, a gear assembly, a moving contact assembly and a static contact assembly. The elements at least partially outside the insulating shell comprise a conductor or / and a shunt conductor and a conductive piece; the moving contact assembly at least comprises a flexible wire, and the moving contact assembly and the diverter conductor are isolated through an insulating shell. The soft wire in the insulating shell and the diverter conductor outside the insulating shell are arranged along the same insulating shell wall in the direction opposite to the current, so that Ampere force is generated between the diverter conductor and the moving contact assembly, and when large current passes through the moving contact assembly, according to different closing directions of the moving contact, the diverter conductor is separated from the moving contact assembly. The contact pressure is enhanced, the short-time endurance capability is increased, or the contact pressure is reduced, the breaking speed is increased, or the influence on the contact pressure is small, fine adjustment of the contact pressure is carried out, or the harmful influence of a conductor or / and a shunt conductor on the switch contact pressure is eliminated.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and particularly to an electric load switch. Background Art

[0002] The power system has put forward many new requirements for the load switches used in electric energy meters, such as UC3 test, high-current breaking capacity, etc. The UC3 test requires that the load switch for electric energy meters has a large contact pressure. Currently, the commonly used load switches mainly have two structures: electromagnetic-driven load switches and motor-driven load switches. The electromagnetic-driven load switch has the advantages of simple structure and small volume, but at the same time has the disadvantage of small contact pressure and cannot meet the above requirements. The motor-driven load switch has the advantage of strong overload capacity, but due to the limitation of the product volume and driving power, it is very difficult to make the contact pressure of the product large enough, so that it is very difficult for the load switch to have a high short-time withstand current capacity. This requires that the contact pressure can be compensated to a certain extent when a short-circuit current appears. In the prior art, in order to achieve a high short-time withstand capacity, conductors with currents opposite to that of the moving contact are often added inside the switch. When a short-circuit current occurs, an electromagnetic repulsive force is generated between the two to increase the contact pressure. However, this structure will make the product structure complex, increase the volume, and limit the popularization of the load switch. There is also a requirement that the load switch has a high-current breaking capacity. The prior art generally increases the contact opening distance, makes a large arc extinguishing chamber or increases the contact opening speed. Currently, the commonly used method to increase the opening speed of the load switch is to set a dead zone, store energy with an elastic member and release it quickly. However, this structure has a large volume, complex structure, and increased cost, which restricts the popularization of the load switch. How to increase or decrease the contact force without increasing the parts and volume of the load switch and without making the load switch more complex, and respectively achieve the improvement of the short-time withstand current capacity and the high-current breaking capacity, has become an urgent need in the load switch industry.

[0003] At the same time, for the load switch to be wired, an external conductive member must be provided. When energized, a magnetic field is generated around the external conductive member. This magnetic field is superimposed on the magnetic field generated by the moving contact itself when it is energized, and will generate an Ampere force on the internally energized conductor. Among them, the moving contact conductor is movable, so the Ampere force generated by the magnetic field of the external conductive member on the moving contact will cause the moving contact to be pressurized or depressurized. This kind of pressurization or depressurization has a very adverse effect on the load switch, which will cause the switch function to fail or the reliability to deteriorate. Therefore, during the switch manufacturing process, the influence of the Ampere force generated by the superposition of these external conductors and internal conductors must be avoided to the greatest extent. And how to eliminate the harmful influence of the pressurization or depressurization of the external conductive member of the load switch on the moving contact after energization, or even turn the harmful influence of the pressurization or depressurization of the external conductive member on the moving contact into a beneficial influence, has become an urgent need in the load switch industry. Summary of the Invention

[0004] Based on the above background, the present invention provides an electric load switch, which, without increasing the product volume, eliminates the influence of the external conductive member on the increase or decrease of the contact pressure of the load switch by controlling the external conductive member and the settings of various components inside the product. Or by forming a current flow in the opposite direction between the external conductive member and the internal moving contact assembly, beneficial compensation for the contact pressure is carried out, thereby improving the short-time withstand current capacity of the switch; or beneficial compensation is given in the contact opening direction to improve the breaking speed of the load switch and thus enhance the breaking current capacity of the load switch. Or a tiny Ampere force is formed to selectively fine-tune the increase or decrease of the contact pressure of the load switch, thereby fine-tuning the short-time withstand capacity and breaking current capacity of the load switch.

[0005] The present application discloses an electric load switch, which at least includes an insulating housing, internal components disposed within the insulating housing, and external components disposed entirely or partially outside the insulating housing. The internal components at least include a motor assembly, a gear assembly, a moving contact assembly, and a stationary contact assembly. The external components at least include a conductor or / and a shunt conductor and a conductive member. The conductor or / and the shunt conductor is disposed longitudinally close to the side wall of the insulating housing and is entirely or partially located outside the insulating housing. The conductive member is entirely or partially located outside the insulating housing. The moving contact assembly at least includes a flexible wire. At least part of the current flowing through the flexible wire is in a direction opposite or substantially opposite to the current flowing through the conductor or / and the shunt conductor. The moving contact assembly is isolated from the conductor or / and the shunt conductor by the insulating housing. The motor assembly is disposed longitudinally or transversely within the insulating housing. At least part of the flexible wire is disposed longitudinally or transversely or at an angle with respect to the conductor or / and the shunt conductor within the insulating housing. The stationary contact assembly is disposed on the conductor or / and the shunt conductor. A part of the moving contact assembly forms an angle of -35° to 35° with the conductor or / and the shunt conductor, and the flexible wire in another part of the moving contact assembly is parallel or substantially parallel to the conductor or / and the shunt conductor for a partial length. When the moving contact assembly moves in the closing direction towards the position where the conductor or / and the shunt conductor is located, a repulsive force is generated when a short-circuit current passes through, and the pressure exerted by the moving contact assembly on the stationary contact assembly decreases. The stationary contact assembly is disposed on the conductive member. A part of the moving contact assembly forms an angle of -35° to 35° with the conductor or / and the shunt conductor, and the flexible wire in another part of the moving contact assembly is parallel or substantially parallel to the conductor or / and the shunt conductor for a partial length. When the moving contact assembly moves in the closing direction away from the position where the conductor or / and the shunt conductor is located, an electro-dynamic repulsive force is generated when a short-circuit current passes through, and the pressure exerted by the moving contact assembly on the stationary contact assembly increases. The stationary contact assembly is disposed on the conductor or / and the shunt conductor or on the conductive member. A part of the moving contact assembly forms an angle of 75° to 125° with the conductor or / and the shunt conductor, and the flexible wire in another part of the moving contact assembly is parallel or substantially parallel to the conductor or / and the shunt conductor for a partial length. When the moving contact assembly moves in the closing direction towards the top or bottom of the insulating housing, when a short-circuit current passes through, the Ampere force acting in the direction of the contact pressure on the moving contact assembly is within 1 N, and the pressure exerted by the moving contact assembly on the stationary contact assembly increases by within 1 N or decreases by within 1 N or remains unchanged.

[0006] In the above embodiments, the insulating housing serves as the insulator, protector, mounting part, and structural support of the load switch. Inside the insulating housing, a motor assembly, a gear assembly, a moving contact assembly, and a static contact assembly are installed; outside the insulating housing, there are at least a shunt conductor and a conductive part. The shunt in the provided shunt conductor provides current sampling for the system. The shunt conductor is connected to the alloy contact of the moving contact assembly by a soft or / and hard wire in the moving contact assembly, or is connected to the static contact. The static contact assembly is arranged on the conductive part; a part of the moving contact assembly except the soft wire forms an angle of -35° to 35° with the conductor or / and the shunt conductor, and another part such as the soft wire is parallel or substantially parallel to the conductor or / and the shunt conductor for a partial length. When the closing movement direction of the moving contact assembly deviates from the position where the conductor or / and the shunt conductor is located, the moving contact assembly and the shunt conductor are arranged in a substantially U shape, and the current directions flowing through the soft or hard wire and the shunt conductor are opposite. When a short-circuit current passes through, an electro-dynamic repulsive force will be generated, and the pressure exerted by the moving contact assembly on the static contact assembly increases; an Ampere force is generated between the shunt conductor and the moving contact assembly and is applied to the silver alloy contact of the moving contact assembly to form a beneficial compensation for the contact pressure, ensuring the reliable connection of the contacts, effectively ensuring the short-time withstand current capacity, and improving the safety and reliability of the product. The static contact assembly is arranged on the conductor or / and the shunt conductor; a part of the moving contact assembly except the soft wire forms an angle of -35° to 35° with the conductor or / and the shunt conductor, and another part such as the soft wire is parallel or substantially parallel to the conductor or / and the shunt conductor for a partial length. When the closing movement direction of the moving contact assembly points to the position where the conductor or / and the shunt conductor is located, when a short-circuit current passes through, a repulsive force will be generated, and the pressure exerted by the moving contact assembly on the static contact assembly decreases; an Ampere force is generated between the shunt conductor and the moving contact assembly and is applied to the alloy contact of the moving contact assembly to form a beneficial compensation for the opening of the moving contact assembly, accelerating the opening of the moving contact, increasing the breaking speed of the product, improving the high-current breaking capacity of the load switch, and ensuring the safety and reliability of the load switch. The static contact assembly is arranged on the conductor or / and the shunt conductor or on the conductive part; a part of the moving contact assembly except the soft wire forms an angle of 75° to 125° with the conductor or / and the shunt conductor, and another part such as the soft wire is parallel or substantially parallel to the conductor or / and the shunt conductor for a partial length. When the closing movement direction of the moving contact assembly points to the top or bottom of the insulating housing, when a short-circuit current passes through, the Ampere force in the direction of the contact pressure acting on the moving contact assembly is within 1 N, and the pressure exerted by the moving contact assembly on the static contact assembly increases slightly or decreases slightly or has no effect. This tiny Ampere force can selectively fine-tune the forces in two directions of the contact pressure and the contact opening of the load switch according to actual needs, so as to ensure both the short-time tolerance capacity of the load switch and the breaking current capacity of the switch.It is also possible to eliminate the adverse effect of an external conductor, such as a shunt conductor, on the contact pressure without adding components, changing the volume, or increasing the cost, so that the external conductor has no effect on the contact pressure and the load switch reaches high reliability.

[0007] In some embodiments, the moving contact assembly further includes at least a moving contact rotation fulcrum portion, a moving contact driving portion, and a moving contact contacting portion; the moving contact contacting portion is provided with at least a silver alloy contact; the static contact assembly includes at least an alloy contact and a static contact plate.

[0008] In the above embodiments, the moving contact assembly includes at least a moving contact rotation fulcrum portion, a moving contact driving portion, and a moving contact contacting portion. The moving contact contacting portion is provided with at least a silver alloy contact. The silver alloy contact cooperates with the alloy contact to form reliable breaking and conduction. Flexible wires and / or rigid wires are used to connect and conduct the silver alloy contact and the shunt conductor to ensure the flow of large currents. The moving contact driving portion is connected to a connecting rod, and the driving force of the gear assembly is received through the connecting rod, so that the moving contact assembly rotates around the rotation fulcrum portion to complete the breaking and closing operations of the load switch. The alloy contact of the static contact assembly is welded or riveted or integrally formed with the static contact plate and fixedly installed inside the insulating housing.

[0009] In some embodiments, the moving contact assembly is provided with a reed made of a ferromagnetic steel material, a non-ferromagnetic steel material, or a copper material.

[0010] In the above embodiments, the moving contact assembly may also be provided with a reed, and the material of the reed may be a ferromagnetic steel material, a non-ferromagnetic steel material, or a copper material, which is selected according to needs.

[0011] In some embodiments, the moving contact assembly is provided with a copper conductor, and an elastic member is disposed corresponding to the periphery of the copper conductor and acts on the copper conductor or the moving contact rotation fulcrum portion, the moving contact driving portion, and the moving contact contacting portion.

[0012] In the above embodiments, the moving contact assembly may also be provided with a copper conductor, and an elastic member is disposed around the copper conductor. The elastic member acts on the copper conductor or the moving contact rotation fulcrum portion, the moving contact driving portion, and the moving contact contacting portion, and the generated elasticity provides contact pressure and overtravel for the moving contact assembly.

[0013] In some embodiments, the flexible wire is connected to the copper conductor.

[0014] In the above embodiments, the flexible wire can be welded or riveted to the copper conductor to conduct current.

[0015] In some embodiments, the central axis of the motor assembly is arranged in a staggered height or on a plane with the central axis of the silver alloy contact and / or the alloy contact.

[0016] In the above embodiments, the motor assembly and the silver alloy contact or / and alloy contact can be arranged in a staggered manner, and can even be arranged in cavities at different heights. For example, the insulating housing can be divided into upper and lower cavities. The moving contact assembly and the static contact assembly are arranged in the upper cavity, and the motor assembly and the gear assembly are arranged in the lower cavity; or they can be arranged on the same plane.

[0017] In some embodiments, the static contact plate is integrally provided with a conductor or / and a shunt conductor.

[0018] In some embodiments, the static contact plate is integrally provided with a conductive member.

[0019] In the above embodiments, the static contact plate is integrally provided with a conductor or / and a shunt conductor, or the static contact plate is integrally provided with a conductive member, which is selected according to actual needs.

[0020] In some embodiments, a connecting rod is directly or indirectly connected between the gear assembly and the moving contact driving part.

[0021] In the above embodiments, the gear assembly and the moving contact driving part are directly or indirectly connected and driven through a connecting rod.

[0022] In some embodiments, the motor assembly, the gear assembly, and the connecting rod drive the moving contact assembly to rotate to make electrical connection and disconnection with the static contact assembly.

[0023] In the above embodiments, the torque generated by the motor assembly drives the moving contact assembly to rotate through the gear assembly and the connecting rod to make electrical connection and disconnection with the static contact assembly.

[0024] In some embodiments, at least one inner side of the insulating housing is provided with a shaft for the moving contact assembly to rotate and at least one shaft for the gear assembly to rotate.

[0025] In some embodiments, the shaft for the moving contact to rotate and at least one shaft for the transmission gear assembly to rotate are arranged in a staggered manner or at the same height.

[0026] In the above embodiments, multiple shafts are provided in the insulating housing for the moving contact assembly to rotate and the gear assembly to rotate. The shafts can be inserted shafts or shafts formed by the structure of the insulating housing. These shafts can be at the same height or at different heights, which is selected according to actual needs.

[0027] In some embodiments, the flexible wire is a wire composed of thin copper sheets or stranded fine copper wires.

[0028] In the above embodiments, the flexible wire is a wire composed of stranded fine copper wires, or a wire composed of at least one layer of thin copper sheets.

[0029] In some embodiments, the extending direction of the motor assembly is arranged in the same axial direction as the conductor or / and the shunt conductor, or at an angle of 75° to 125°.

[0030] In the above embodiments, the extending direction of the motor assembly is the same as the axial direction of the conductor or / and the shunt conductor, or is arranged at an angle between 75° and 125°; among the arrangements at an angle between 75° and 125°, a right-angle arrangement is a typical arrangement mode, which is preferably selected according to the actual situation.

[0031] In some embodiments, the shunt conductor is a component formed by connecting a plurality of metals of different materials.

[0032] In the above embodiments, the shunt conductor is formed by connecting metals of different materials such as manganin, pure copper or brass, etc., which is preferably selected according to actual needs.

[0033] In some embodiments, the moving contact assembly is arranged between the static contact assembly and the conductor or / and the shunt conductor.

[0034] In some embodiments, the motor assembly is longitudinally arranged on one side of the static contact assembly and is arranged opposite to the moving contact assembly.

[0035] In some embodiments, the motor assembly is longitudinally arranged on one side of the static contact assembly and is arranged opposite to the moving contact assembly.

[0036] In the above embodiments, the moving contact assembly is arranged between the static contact assembly and the conductor or / and the shunt conductor, and the motor assembly is longitudinally arranged on one side of the static contact assembly and is arranged opposite to the moving contact assembly, which is a preferred arrangement mode. The motor assembly being longitudinally arranged on one side of the static contact assembly and being arranged opposite to the moving contact assembly is another preferred mode.

[0037] In some embodiments, the moving contact assembly is arranged on one side of the static contact assembly and the conductor or / and the shunt conductor.

[0038] In some embodiments, the motor assembly is longitudinally arranged on the opposite side of the static contact assembly and the conductor or / and the shunt conductor with the moving contact assembly as the relative center.

[0039] In the above embodiments, the moving contact assembly is arranged on one side of the static contact assembly and the conductor or / and the shunt conductor, and the motor assembly is longitudinally arranged on the opposite side of the static contact assembly and the conductor or / and the shunt conductor with the moving contact assembly as the relative center, forming a longitudinal arrangement of the static contact assembly, the conductor or / and the shunt conductor, the moving contact assembly, and the motor assembly in sequence, which is a preferred structural layout.

[0040] In some embodiments, the moving contact assembly is disposed in front of the stationary contact assembly and the conductor and / or shunt conductor.

[0041] In some embodiments, the motor assembly is disposed horizontally in front of or behind the stationary contact assembly.

[0042] In the above embodiments, the moving contact assembly is disposed in front of the stationary contact assembly and the conductor and / or shunt conductor, which is a preferred structural layout.

[0043] In some embodiments, the insulating housing is divided into an upper cavity and a lower cavity.

[0044] In the above embodiments, the insulating housing is divided into an upper cavity and a lower cavity, and different internal components can be disposed in the two cavities.

[0045] In some embodiments, the moving contact assembly and the stationary contact assembly are disposed in the upper cavity, and the motor assembly and the gear assembly are disposed in the lower cavity.

[0046] In the above embodiments, the moving contact assembly and the stationary contact assembly are disposed in the upper cavity, and the motor assembly and the gear assembly are disposed in the lower cavity, which is a preferred structure. Such a structure makes the electric motorized load switch small in size and large in capacity.

[0047] In some embodiments, part or all of the gear assembly is disposed between the motor assembly and the moving contact assembly.

[0048] In the above embodiments, a reasonable layout of the gear assembly, the motor assembly, and the moving contact assembly can save space and is beneficial to the miniaturization of the electric motorized load switch.

[0049] In some embodiments, the motorized load switch is single-pole or three-pole.

[0050] In the above embodiments, the single-pole electric load switch and the three-pole electric load switch are two typical products.

[0051] In some embodiments, the single-pole electric motorized load switch is provided with at least two power terminals.

[0052] In the above embodiments, the single-pole electric motorized load switch has at least two power terminals for meeting the incoming and outgoing line wiring of at least single-phase electricity.

[0053] In some embodiments, the three-pole electric motorized load switch is provided with at least six power terminals.

[0054] In the above embodiments, the single-pole electric load switch has at least six power terminals for meeting the incoming and outgoing wiring of at least three-phase electricity.

[0055] In some embodiments, the electric load switch is provided with a control power input terminal.

[0056] In the above embodiments, the electric load switch is provided with a control power input terminal, and the control power is input therefrom and delivered to the motor assembly.

[0057] In some embodiments, the electric load switch is provided with an arc extinguishing chamber.

[0058] In some embodiments, the arc extinguishing chamber includes at least one magnetic material sheet.

[0059] In the above embodiments, the arc extinguishing chamber is composed of at least one ferromagnetic grid sheet for cooling and extinguishing the arc generated when the contact switch is opened.

[0060] In some embodiments, both the moving contact assembly and the static contact assembly are provided with arc guiding angles.

[0061] In the above embodiments, both the moving contact assembly and the static contact assembly are provided with arc guiding angles made of ferromagnetic materials or other conductors, and the arc of the product when the contacts are opened is introduced into the arc extinguishing chamber.

[0062] The beneficial effects of the present invention are as follows:

[0063] 1. Through the creative setting of the structure of the load switch, without adding components, without changing the volume, and without increasing the cost, the adverse effect of external conductors such as shunt conductors on the contact pressure is eliminated, so that the external conductors have no influence on the contact pressure, and the load switch reaches high reliability.

[0064] 2. Without adding components to the load switch and without changing the volume of the load switch, through the creative setting of the product structure, while not increasing the cost of the load switch, the adverse effect of increasing or decreasing the contact pressure by external conductors such as shunt conductors is changed into a beneficial effect, providing an additional compensating contact pressure for the contacts, improving the short-time withstand current capacity of the load switch, and further ensuring the UC3 performance and improving the safety and reliability of the product.

[0065] 3. Through the creative setting of the product structure, without adding components to the load switch and without changing the volume of the load switch, the adverse effect of increasing or decreasing the contact pressure by external conductors such as shunt conductors is changed into a beneficial effect, generating a force beneficial to the contact breaking, accelerating the breaking of the moving contact, improving the breaking speed of the product, improving the large-current breaking capacity of the load switch, and ensuring the safety and reliability of the load switch.

[0066] 4. Without adding components to the load switch and without changing the volume of the load switch, through a creative setting of the product structure, the adverse effects of external conductors such as shunt conductors on the increase or decrease of the contact pressure are eliminated, so that the tiny ampere force generated by the moving contact assembly can, according to the actual situation and needs, selectively compensate for the contact force of the load switch in two directions, namely, the contact pressure or the contact disconnection, balance the short-time withstand capacity and the breaking current capacity, or, when the two performances are already balanced, modulate a slightly higher performance of one of the two performances according to the usage needs, for different usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0068] Figure 1 Structural schematic diagram of a load switch in the prior art;

[0069] Figure 2 Structural schematic diagram of the electric load switch in Embodiment 1 of the present application when the contacts are separated;

[0070] Figure 3 Structural schematic diagram of the electric load switch in Embodiment 1 of the present application when the contacts are in contact;

[0071] Figure 4 Schematic diagram of the contact pressure compensation principle of the electric load switch in Embodiment 1 of the present application;

[0072] Figure 5 Structural schematic diagram of the integrated shunt conductor of the electric load switch in Embodiment 1 of the present application;

[0073] Figure 6 Structural schematic diagram of the moving contact assembly including a soft conductor and a hard conductor in the electric load switch in Embodiment 1 of the present application;

[0074] Figure 7 Another structural schematic diagram of the moving contact assembly including a soft conductor in the electric load switch in Embodiment 1 of the present application;

[0075] Figure 8 Structural schematic diagram of the static contact assembly in the electric load switch in Embodiment 1 of the present application;

[0076] Figure 9 Structural schematic diagram of the electric load switch in Embodiment 2 of the present application;

[0077] Figure 10 Schematic diagram of direction identification and electro-magnetic-force analysis for the second embodiment of the electric load switch disclosed in this embodiment;

[0078] Figure 11 Schematic diagram of the structure for the third embodiment of the electric load switch disclosed in this embodiment;

[0079] Figure 12 Schematic diagram of electro-magnetic-force analysis for the third embodiment of the electric load switch disclosed in this embodiment;

[0080] Figure 13 Schematic diagram of the structure for the fourth embodiment of the electric load switch disclosed in this embodiment;

[0081] Figure 14 Schematic diagram of electro-magnetic-force analysis for the fourth embodiment of the electric load switch disclosed in this embodiment;

[0082] Figure 15 Schematic diagram of the heights of the rotating shaft of the moving contact and the rotating shaft of the gear assembly for the fourth embodiment of the electric load switch disclosed in this embodiment.

[0083] Figure 16 Schematic diagram showing that the moving contact, the static contact, and the central axis of the motor are not in the same plane for the fourth embodiment of the electric load switch disclosed in this embodiment.

[0084] Figure 17 Schematic diagram of the structure for the fifth embodiment of the electric load switch disclosed in this embodiment.

[0085] Figure 18 Schematic diagram of electro-magnetic-force analysis for the fifth embodiment of the electric load switch disclosed in this embodiment;

[0086] Figure 19 Schematic diagram of the internal structure of the upper cavity for the sixth embodiment of the electric load switch disclosed in this embodiment;

[0087] Figure 20 Schematic diagram of the internal structure of the lower cavity for the sixth embodiment of the electric load switch disclosed in this embodiment;

[0088] Figure 21 Schematic diagram of electro-magnetic-force analysis for the sixth embodiment of the electric load switch disclosed in this embodiment; Detailed implementation manners

[0089] To make the objectives, technical solutions, and advantages of the implementation of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present invention.

[0090] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0091] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0092] In the load switch of the prior art, as Figure 1 shown, the load switch may include a driving DC motor 4, a turbine gear set 6, a moving contact 91, and a stationary contact 31. In this solution of the switching device, the DC motor 4, the turbine gear set 6, the moving contact 91, and the stationary contact 31 are arranged in the Y direction, and a U-shaped setting is not formed between the moving contact assembly and the lead-out end, there is no reverse current, and no repulsive force compensation pressure is generated.

[0093] Embodiment 1

[0094] To solve the problems existing in the above-mentioned prior load switch, as Figures 2 to 6As shown in the figure, this embodiment provides an electric load switch, which includes an insulating housing 100, internal components disposed within the insulating housing, and external components at least partially outside the insulating housing. The internal components within the insulating housing at least include a motor assembly 400, a gear assembly 500, a moving contact assembly 200, and a stationary contact assembly 300; the components at least partially outside the insulating housing 100 at least include a shunt conductor 600 and a conductive member 2010; the motor assembly 400, the moving contact assembly 200, and the shunt conductor 600 are longitudinally disposed along the Y axis respectively. Among them, most of the shunt conductor is disposed outside the left side of the insulating housing 100, a small part extends onto the insulating housing 100 for fixation, and an extremely small part extends into the insulating housing 100. The moving contact assembly 200 and the shunt conductor 600 are arranged in a substantially U shape, such that the current directions flowing through the moving contact assembly 200 and the shunt conductor 600 are opposite. The moving contact assembly 200 and the shunt conductor 600 are isolated from each other by the insulating housing 100. In this embodiment, the load switch is arranged in a substantially U shape along the side wall close to the insulating housing 100 for the moving contact assembly 200 inside the insulating housing 100 and the shunt conductor 600 outside the insulating housing. Preferably, the stationary contact assembly 300 is disposed on the conductive member 2010; when the moving contact assembly 200 and the stationary contact assembly 300 are closed, a part of the moving contact assembly 200, such as the reed 2200, is parallel to the shunt conductor 600. When the moving contact assembly 200 and the stationary contact assembly 300 are not closed, the included angle formed by a part of the moving contact assembly 200, such as the reed 2200, and the shunt conductor 600 is between -35° and 35°, and another part, such as the flexible wire 2005, is parallel or substantially parallel to the shunt conductor 600 for a partial length. The moving direction of the moving contact assembly 200 when closed is away from the position where the conductor or / and the shunt conductor is located, so that the Ampere force generated by the cooperation of the moving contact assembly 200 and the shunt conductor 600 compensates for the contact pressure, ensuring reliable conduction of the contacts and improving the short-time withstand current capacity of the product.

[0095] Preferably, the shunt conductor 600 is an integral part or a part formed by connecting multiple metals of different materials. In this embodiment, as Figure 5 shown, the shunt conductor 600 includes a shunt 6001, an inner terminal 6002, and an outer terminal 6003. The shunt 6001, the inner terminal 6002, and the outer terminal 6003 are welded into an integral part. Among them, the shunt 6001, the inner terminal 6002, and the outer terminal 6003 can be the same or different conductive materials. Preferably, the shunt 6001 is made of manganin material, and the inner terminal 6002 and the outer terminal 6003 are made of pure copper material.

[0096] As Figures 2 to 4As shown, in this embodiment, the shunt conductor 600 is disposed close to the side wall of the insulating housing 100. By disposing the shunt conductor 600 close to the side wall of the insulating housing 100, a smaller distance can be achieved from the moving contact assembly 200 inside the insulating housing 100, generating a greater Ampere force to compensate for the contact pressure.

[0097] Preferably, the moving contact assembly 200 at least includes a silver alloy contact 2001, a flexible wire 2005 or / and a copper conductor 2006, a moving contact driving part 2003, a moving contact rotation fulcrum part 2004, and a reed 2200. In this embodiment, Figure 6 A schematic diagram of the moving contact assembly composed of the flexible wire 2005 and the copper conductor 2006 according to an embodiment of the present disclosure is shown. The copper conductor 2006 is riveted or welded to the tail of the silver alloy contact 2001. One end of the flexible wire 2005 is welded or riveted to the copper conductor 2006, and the other end of the flexible wire 2005 is welded or riveted to the shunt conductor 600. The flexible wire 2005 can be one or more. It can be a wire composed of multiple strands of fine copper wires, or it can be one or more layers of thin copper sheets. The reed 2200 is a sheet body made of 65Mn steel material, and provides contact pressure and overtravel for the moving contact by its own bending deformation. In other embodiments, the flexible wire 2005 or the copper conductor 2006 can also be an elastic metal sheet; the reed 2200 can be a tin bronze or a sheet body made of other grades of manganese steel materials.

[0098] As Figure 4 shown, when the current flows from the shunt conductor 600 from bottom to top along the arrow direction marked I, and then flows from top to bottom along the arrow direction marked I through the flexible wire 2005 to the silver alloy contact 2001, according to the principle of generating a magnetic field around a current-carrying conductor, in accordance with the right-hand rule, the direction of the magnetic field lines between the shunt conductor 600 and the flexible wire 2005 is into the paper perpendicular to the paper surface as shown in the figure. The same magnetic field line marking is also used in the following drawings. At the same time, according to the principle of a current-carrying conductor being subjected to a force in a magnetic field, in accordance with the left-hand rule, it is determined that the flexible wire 2005 is subjected to a force to the right, which is superimposed on the silver alloy contact 2001 to form a beneficial compensation for the contact pressure. This beneficial compensation for the contact pressure is crucial for improving the short-time overload current withstand capacity of the product. It should be noted that when the shunt conductor 600 is from top to bottom along the arrow direction marked I, in the case where both the current direction and the magnetic field direction are reversed, the force direction remains unchanged, which will not be elaborated here.

[0099] As Figure 8As shown, the static contact assembly 300 at least includes an alloy contact 3001 and a static contact plate 3002. The alloy contact 3001 of the static contact assembly 300 cooperates with the silver alloy contact 2001 in the moving contact assembly 200 to form reliable breaking and conduction. The alloy contact 3001 of the static contact assembly 300 is welded or riveted to the static contact plate 3002 or integrally formed, and is fixedly installed inside the insulating housing 100. The static contact plate 3002 extends outward from the insulating housing 100 to form a conductive member, that is, the static contact plate 3002 and the conductive member 2010 are integrally provided.

[0100] Preferably, the gear assembly 500 is disposed between the motor assembly 400 and the moving contact assembly 200. The motor assembly 400 generates a rotational driving force, which is decelerated and amplified by the gear assembly 500 and applied to the moving contact driving portion 2003 of the moving contact assembly 200, causing the moving contact assembly 200 to swing around the moving contact rotation fulcrum portion 2004 to form closing and breaking operations. By disposing the alloy contact 3001 of the static contact assembly 300 below the gear assembly 500 along the Y-axis, the position below the gear assembly 500 along the Y-axis is fully utilized, and the alloy contact 3001 of the static contact assembly 300 no longer occupies additional X-axis positions, reducing the X-axis dimension of the load switch. The alloy contact 3001 of the static contact assembly 300 is disposed in the vacant space below the gear assembly 500 in the Y-axis direction, which can fully utilize the space of the load switch to optimize the X-direction dimension of the load switch.

[0101] Preferably, the gear assembly 500 includes a driving turntable 5001, and a driving hole 5002 is provided on the circumference of the driving turntable 5001. The driving hole 5002 is connected to the moving contact driving portion 2003 of the moving contact assembly 200 by a connecting rod 700 to drive the moving contact assembly 200 to rotate or swing around the moving contact rotation fulcrum portion 2004. The driving turntable 5001 is pushed to rotate by the motor assembly 400 and the gear assembly 500. In this embodiment, a driving hole 5002 is provided on the circumference of the driving turntable 5001. One end of the connecting rod 700 is connected to the driving hole 5002, and the other end of the connecting rod 700 is connected to the moving contact driving portion 2003 of the moving contact assembly 200. Through the transmission of the connecting rod 700, the rotation of the driving turntable 5001 will drive the contact assembly 200 to rotate or swing.

[0102] In this embodiment, as Figure 7 and Figure 8As shown in the figure, an armature 800 can be superimposed on the silver alloy contact 2001 at the head of the moving contact assembly 200, and a yoke 900 can be superimposed on the head of the static contact assembly 300. When the contacts of the silver alloy contact and the alloy contact are in the closed state, there is a gap of 0.2 - 1 mm between the armature 800 and the yoke 900. When the silver alloy contact and the alloy contact are closed, the armature 800 and the yoke 900 approach to form a closed magnetic circuit. When current flows through the moving contact assembly 200 and the static contact assembly 300, an induced magnetic field is generated between the armature 800 and the yoke 900, and a suction force is generated between the armature 800 and the yoke 900, forming a compensation force for the contact pressure. The setting of this gap can prevent the armature 800 and the yoke 900 from contacting before the silver alloy contact and the alloy contact when the contacts are worn, so that the two alloy contacts can still make reliable contact when a certain amount of wear occurs, ensuring the electrical life of the product. In Figure 8 In this embodiment, the moving contact assembly 300 superimposed with the yoke 900 is disclosed. It should be noted that the shapes of the armature 800 and the yoke 900 are not limited to the sheet or U shape shown in the figure, and can also be combinations of other shapes and quantities.

[0103] Embodiment 2

[0104] As Figure 9 and Figure 10 As shown in the figure, the present invention provides an electric load switch of another embodiment, which is different from Embodiment 1 in that part of the shunt conductor 600 is arranged outside the left side of the insulating housing 100, the static contact assembly 300 is integrally arranged with the shunt conductor, the moving contact assembly 200 is horizontally arranged at the upper part of the electric load switch, the motor assembly 400 is longitudinally arranged at the lower right position inside the insulating housing 100, and the gear assembly 500 is arranged at the left side of the motor assembly 400. The gear assembly drives the moving contact assembly 200 and the static contact assembly 300 to make and break the electrical connection through the connecting rod 700. Among them, the flexible wire 2005 connects the moving contact assembly 200 and the conductive part 2010, and the static contact assembly 300 is arranged on the shunt conductor 600; when the moving contact assembly 200 and the static contact assembly 300 are closed, a part of the moving contact assembly 200, such as the reed 2200, is perpendicular to the shunt conductor 600. When the moving contact assembly 200 and the static contact assembly 300 are not closed, the included angle formed by a part of the moving contact assembly 200, such as the reed 2200, and the shunt conductor 600 is between 75° and 125°, and another part, such as the flexible wire 2005, is in a parallel or substantially parallel relationship with the shunt conductor 600 for a part of the length. The closing direction of the moving contact assembly 300 points to the top of the insulating housing 100.

[0105] As Figure 10, the left arrow forms a coordinate system. In this patent, the upper part and the right side are defined as such, and the corresponding directions are the lower part and the left side. At the same time, the top is the upper part, and the bottom is the lower part. When the current in the shunt conductor 600 flows upward, when the current flows from the shunt conductor 600 along the arrow marked I from the lower part to the upper part, after passing through the silver alloy contact 2001, and then through the flexible wire 2005 along the arrow marked I from the upper part to the lower part, according to the principle that a magnetic field is generated around a current-carrying conductor, and in accordance with the right-hand rule, the direction of the magnetic field lines of force between the shunt conductor 600, the static contact assembly 300, and the flexible wire 2005 is perpendicular to the paper and inward. At the same time, according to the principle that a current-carrying conductor is subjected to a force in a magnetic field, and in accordance with the left-hand rule, it is determined that the longitudinal section of the flexible wire 2005 is subjected to a force to the right, while the contact pressure is upward. Therefore, the Ampere force in the right direction generated by the shunt conductor 600 on the flexible wire 2005 has basically no effect on the silver alloy contact 2001, which is equivalent to eliminating the effect of the magnetic field generated by the shunt conductor on the contact pressure. It should be noted that when the shunt conductor 600 is from the upper part to the lower part along the arrow marked I, in the case where both the current direction and the magnetic field direction are reversed, the direction of the force remains unchanged, which will not be elaborated here.

[0106] Embodiment III

[0107] As Figure 11 , the present invention provides an electric load switch for Embodiment III. Part of the shunt conductor 600 is arranged outside the left side of the insulating housing 100, part of the static contact assembly 300 is arranged at the lower part of the insulating housing 100, the moving contact assembly 200 is horizontally arranged above the static contact assembly 300. When the contacts are closed, the moving contact assembly 200 forms a 90° angle with the shunt conductor 600. The moving contact assembly 200 is connected to the shunt conductor 600 through the flexible wire 2005. The static contact assembly 300 is arranged on the current-carrying member 2010. When the moving contact assembly 200 and the static contact assembly 300 are closed, a part of the moving contact assembly 200, such as the reed 2200, is perpendicular to the shunt conductor 600. When the moving contact assembly 200 and the static contact assembly 300 are not closed, the angle formed by a part of the moving contact assembly 200, such as the reed 2200, and the shunt conductor 600 is between 75° and 125°. Another part, such as the flexible wire 2005, is in a parallel or substantially parallel relationship with the shunt conductor 600 for a partial length. The closing direction of the moving contact assembly 300 points to the bottom of the insulating housing 100. The motor assembly 400 is horizontally arranged directly above the interior of the insulating housing 100, and the gear assembly 500 is arranged at the lower position of the motor assembly 400. The gear assembly 500 is entirely located between the motor assembly 400 and the moving contact assembly 200. The gear assembly drives the moving contact assembly 200 and the static contact assembly 300 to make and break the electrical connection through the connecting rod 700. The flexible wire 2005 connects the shunt conductor 600 and the moving contact assembly 200.

[0108] AsFigure 12 , when the current in the shunt conductor 600 is upward, the current flows from the shunt conductor 600 from bottom to top along the arrow marked I, and then from top to bottom and from left to right along the arrow marked I by the flexible wire 2005, and flows to the silver alloy contact 2001. According to the principle that a magnetic field is generated around a current-carrying conductor, according to the right-hand rule, the direction of the magnetic field lines between the shunt conductor 600 and the flexible wire 2005 is into the paper perpendicular to the paper surface. At the same time, according to the principle that a current-carrying conductor is subjected to a force in a magnetic field, according to the left-hand rule, it is judged that the longitudinal part of the flexible wire 2005 is subjected to a force to the right, and the short transverse part of the flexible wire 2005 is subjected to a force upward. This tiny downward force is superimposed on the silver alloy contact 2001, and the superimposed force value ≤ 1N, forming a tiny beneficial compensation for the contact opening direction. This tiny beneficial compensation for the contact opening has a limited harmful effect on improving the short-time overload current withstand capacity of the product, but is beneficial to the improvement of the breaking capacity and is used to finely adjust the performance of the product. It should be noted that when the shunt conductor 600 is from top to bottom along the arrow marked I, in the case where both the current direction and the magnetic field direction are reversed, the direction of the force remains unchanged and will not be elaborated here.

[0109] Embodiment 4

[0110] As Figure 13, the present invention provides an electric load switch according to Embodiment 4. The shunt conductor 600 is partially disposed outside the left side of the insulating housing 100. The static contact assembly 300 is integrally provided with the shunt conductor. The moving contact assembly 200 is longitudinally disposed on the right side of the static contact assembly 300. The moving contact assembly 200 is connected to the conductive member 2010 through a flexible wire 2005. The static contact assembly 300 is disposed on the shunt conductor 600. When the moving contact assembly 200 and the static contact assembly 300 are not closed, the included angle formed by a part of the moving contact assembly 200, such as the reed 2200, and the shunt conductor 600 is between -35° and 35°. When the moving contact assembly 200 and the static contact assembly 300 are closed, a part of the moving contact assembly 200, such as the reed 2200, is substantially parallel to the shunt conductor 600, and another part, such as a part of the length of the flexible wire 2005, is parallel or substantially parallel to the shunt conductor 600. The closing direction of the moving contact assembly 200 points to the position where the shunt conductor 600 is located. The motor assembly 400 is longitudinally disposed at the right internal position of the insulating housing 100. The gear assembly 500 is disposed at the lower position of the motor assembly 400. The gear assembly 500 straddles the central axis of the motor assembly 400 and is distributed on both the left and right sides of the motor assembly 400. The gear assembly 500 drives the moving contact assembly 200 and the static contact assembly 300 to conduct and disconnect electricity through the connecting rod 700. The flexible wire 2005 connects the conductive member 2010 and the moving contact assembly 200. When the current in the shunt conductor 600 flows upward, a part of the current in the flexible wire 2005 flows downward, forming opposite current directions; vice versa.

[0111] As Figure 14 , when the current flows from the shunt conductor 600 along the arrow direction marked by I from bottom to top, and then flows from top to bottom along the arrow direction marked by I through the silver alloy contact 2001 and the flexible wire 2005, according to the principle of generating a magnetic field around a current-carrying conductor and in accordance with the right-hand rule, the direction of the magnetic field lines between the shunt conductor 600 and the flexible wire 2005 is shown as perpendicular to the paper surface and inward. At the same time, according to the principle of a current-carrying conductor being subjected to a force in a magnetic field and in accordance with the left-hand rule, it is judged that the flexible wire 2005 is subjected to a force to the right. This force is superimposed on the silver alloy contact, forming a beneficial compensation for the contact opening force. A force beneficial to the contact disconnection is generated, accelerating the disconnection of the moving contact, improving the disconnection speed of the product, improving the high-current disconnection ability of the load switch, and ensuring the safety and reliability of the load switch. It should be noted that when the shunt conductor 600 is from top to bottom along the arrow direction marked by I, in the case where both the current direction and the magnetic field direction are reversed, the force direction remains unchanged and will not be elaborated here.

[0112] As Figure 15 、 16, the rotating shafts 2020 of the moving contact assembly, the rotating shafts 5100 and 5200 of the gear assembly are at the same height, which is a preferred setting method. The axes of the silver alloy contacts 2001 of the moving contact assembly 200 and the alloy contacts 3001 of the static contact assembly 300 are both on the plane 3200, and the central axis of the motor assembly 400 is on the plane 4200. The plane 3200 is above the plane 4200 and the two do not coincide, which is a preferred structure. It is also possible to use a more extreme structure where the motor assembly 400, the moving contact assembly 200, and the static contact assembly can even be arranged in cavities at different heights.

[0113] Embodiment Five

[0114] As Figure 17 , the present invention provides an electric motor-operated load switch for Embodiment Five. Part of the shunt conductor 600 is arranged outside the left side of the insulating housing 100, part of the static contact assembly 300 is arranged at the lower part of the insulating housing 100, the moving contact assembly 200 is longitudinally arranged on the left side of the static contact assembly 300, and the moving contact assembly 200 is connected to the shunt conductor 600 through a flexible wire 2005. The static contact assembly 300 is arranged on the conductive member 2010; when the moving contact assembly 200 is closed with the static contact assembly 300, a part of the moving contact assembly 200, such as the reed 2200, is parallel to the shunt conductor 600. When the moving contact assembly 200 is not closed with the static contact assembly 300, the included angle formed by a part of the moving contact assembly 200, such as the reed 2200, and the shunt conductor 600 is between -35° and 35°. Another part, such as the flexible wire 2005, is in a parallel or substantially parallel relationship with the shunt conductor 600 for a partial length. The closing direction of the moving contact assembly 200 is away from the position where the shunt conductor 600 is located. The electric motor-operated load switch is also provided with an arc extinguishing chamber 2500, which includes multiple steel sheets and insulating plates to extinguish the arc generated when the contact is disconnected. The motor assembly 400 is horizontally arranged at the upper position inside the insulating housing 100, and the gear assembly 500 is arranged at the lower part of the motor assembly 400 and at the left side position of the moving contact part 200. The gear assembly 400 drives the moving contact assembly 200 and the static contact assembly 300 to make and break the electricity through the connecting rod 700. The flexible wire 2005 connects the shunt conductor 600 and the moving contact assembly 200. When the current in the shunt conductor 600 is upward, the end of the flexible wire 2005 near the contact part forms an included angle of about -20° with the shunt conductor 600, and the current is roughly in the downward direction, forming a substantially opposite current direction; the reverse current is the same.

[0115] As Figure 18As shown, when current flows from the shunt conductor 600 from bottom to top along the arrow marked I, and then from the upper left to the lower right along the arrow marked I via the flexible wire 2005 to the silver alloy contact, the part of the flexible wire 2005 near the contact end forms a current direction that is roughly opposite to that of the shunt conductor 600. According to the principle that a magnetic field is generated around a current-carrying conductor, following the right-hand rule, the direction of the magnetic field lines between the shunt conductor 600 and the flexible wire 2005 is shown as perpendicular to the paper and into the paper. At the same time, according to the principle that a current-carrying conductor is subjected to a force in a magnetic field, following the left-hand rule, it is determined that the part of the flexible wire 2005 near the silver alloy contact is subjected to a force roughly to the right, which is superimposed on the silver alloy contact to form a beneficial compensation for the contact pressure. This beneficial compensation for the contact pressure is crucial for improving the short-time overload current withstand capacity of the product. It should be noted that when the shunt conductor 600 is from top to bottom along the arrow marked I, in the case where both the current direction and the magnetic field direction are reversed, the direction of the force remains unchanged and will not be elaborated here.

[0116] Embodiment Six

[0117] As Figure 19 , Figure 20 , the present invention provides an electric motor-operated load switch for Embodiment Six. The intermediate partition of the insulating housing 100 divides the insulating housing into upper and lower cavities. As Figure 19 shown, the upper cavity is shown. The moving contact assembly 200, the static contact assembly 300, and the arc extinguishing chamber 2500 are arranged in the upper cavity; as Figure 20 shown, the driving assembly 400 and the gear assembly 500 are arranged in the lower cavity, and the connecting rod 700 crosses the upper and lower cavities through the hole in the partition of the insulating housing 100. Then look Figure 19 , part of the shunt conductor 600 is arranged outside the left side of the insulating housing 100, part of the static contact assembly 300 is arranged in the lower right part of the insulating housing 100, the moving contact assembly 200 is longitudinally arranged on the left side of the static contact assembly 300, the moving contact assembly 200 is connected to the shunt conductor 600 through the flexible wire 2005, and the static contact assembly 300 is arranged on the conductive member 2010; when the moving contact assembly 200 and the static contact assembly 300 are closed, a part of the moving contact assembly 200 such as the reed 2200 is roughly parallel to the shunt conductor 600, and another part such as a part of the length of the flexible wire 2005 is parallel or roughly parallel to the shunt conductor 600. When the moving contact assembly 200 and the static contact assembly 300 are not closed, the included angle formed by a part of the moving contact assembly 200 such as the reed 2200 and the shunt conductor 600 is between -35° and 35°, and the closing direction of the moving contact assembly 200 is away from the position where the shunt conductor 600 is located. The electric motor-operated load switch also has an arc extinguishing chamber 2500, and the arc extinguishing chamber 2500 includes multiple steel sheets and insulating plates to extinguish the arc generated when the contact is disconnected. Then look Figure 20, the motor assembly 400 is horizontally arranged at the left position of the lower cavity of the insulating housing 100, the gear assembly 500 is arranged on the right side of the motor assembly 400, and the gear assembly 500 drives the moving contact assembly 200 and the static contact assembly 300 in the upper cavity of the insulating housing 100 to be electrically connected and disconnected through the connecting rod 700. The flexible wire 2005 connects the shunt conductor 600 and the moving contact assembly 200. When the current in the shunt conductor 600 is upward, the part of the end of the flexible wire 2005 close to the contact is substantially parallel to the shunt conductor 600, and the current is substantially downward, forming a substantially opposite current direction; the reverse current is the same.

[0118] As Figure 21 shown, when the current flows from the shunt conductor 600 from bottom to top along the arrow direction marked I, and then flows from the upper left to the lower right along the arrow direction marked I through the flexible wire 2005 to the silver alloy contact, the part of the end of the flexible wire 2005 close to the contact forms a substantially opposite current direction to the shunt conductor 600. According to the principle that a magnetic field is generated around a current-carrying conductor, according to the right-hand rule, the direction of the magnetic field lines between the shunt conductor 600 and the flexible wire 2005 is shown as into the paper perpendicular to the paper surface. At the same time, according to the principle that a current-carrying conductor is subjected to a force in a magnetic field, according to the left-hand rule, it is judged that the part of the flexible wire 2005 close to the silver alloy contact is subjected to a force substantially to the right, which is superimposed on the silver alloy contact to form a beneficial compensation for the contact pressure. This beneficial compensation for the contact pressure is crucial for improving the short-time overload current withstand capacity of the product. It should be noted that when the shunt conductor 600 is from top to bottom along the arrow direction marked I, in the case where both the current direction and the magnetic field direction are reversed, the direction of the force remains unchanged and will not be elaborated here.

[0119] The present invention can be implemented in other specific forms without departing from its spirit and essential features. The current embodiments are regarded as exemplary in all aspects rather than restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and all changes falling within the meaning and equivalents of the claims are thus included in the scope of the present invention.

Claims

1. An electric load switch, characterized in that: The invention comprises at least an insulating shell and internal components arranged in the insulating shell and external components wholly or partially arranged outside the insulating shell, wherein the internal components at least comprise a motor assembly, a gear assembly, a moving contact assembly and a stationary contact assembly; the external components at least comprise a conductor or / and a shunt conductor and a conductive member, wherein the conductor or / and the shunt conductor are arranged longitudinally close to the side wall of the insulating shell and are wholly or partially located outside the insulating shell, and the conductive member is wholly or partially located outside the insulating shell, and the moving contact assembly at least comprises a soft wire, and at least part of the current flowing through the soft wire is in the opposite direction to the current flowing through the conductor or / and the shunt conductor. The moving contact assembly is in the opposite or substantially opposite direction from the conductor or / and the shunt conductor by an insulating housing; the motor assembly is arranged longitudinally or transversely in the insulating housing; at least part of the soft wire is arranged longitudinally or transversely or at a certain angle to the conductor or / and the shunt conductor in the insulating housing, and the static contact assembly is arranged on the conductor or / and the shunt conductor; a part of the moving contact assembly is at an angle of -35° to 35° to the conductor or / and the shunt conductor, and the soft wire in another part of the moving contact assembly is parallel or substantially parallel to the conductor or / and the shunt conductor for part of its length, and the movement of the moving contact assembly to close When the moving contact assembly points to the location of the conductor or / and the shunt conductor, a repulsive force is generated when a short-circuit current passes through, and the pressure applied by the moving contact assembly to the static contact assembly is reduced; the static contact assembly is arranged on the conductive member; a part of the moving contact assembly is at an angle of -35° to 35° with the conductor or / and the shunt conductor, and the soft wire in another part of the moving contact assembly is parallel or approximately parallel to the conductor or / and the shunt conductor for part of its length; when the closing movement direction of the moving contact assembly is away from the location of the conductor or / and the shunt conductor, an electromotive repulsive force is generated when a short-circuit current passes through, and the moving contact assembly applies an electromotive repulsive force to the static contact assembly. The pressure on the moving contact assembly increases; the static contact assembly is arranged on the conductor or / and the shunt conductor or on the conductive member; a part of the moving contact assembly is at an angle of 75° to 125° with the conductor or / and the shunt conductor, and the soft wire in the other part of the moving contact assembly is parallel or approximately parallel to the conductor or / and the shunt conductor for part of its length; when the closing movement direction of the moving contact assembly points to the top or bottom of the insulating housing, when a short-circuit current passes through, the Ampere force acting on the moving contact assembly in the direction of the contact pressure is within 1N, and the pressure applied by the moving contact assembly on the static contact assembly increases within 1N or decreases within 1N or remains unchanged.

2. An electric load switch according to claim 1, characterized in that: The moving contact assembly at least includes a moving contact rotation fulcrum, a moving contact driving portion, and a moving contact contact portion, wherein the moving contact contact portion is at least provided with a silver alloy contact; the stationary contact assembly at least includes an alloy contact and a stationary contact plate.

3. An electric load switch according to claim 2, characterized in that: The moving contact assembly is provided with a reed made of magnetically conductive steel material, a reed made of non-magnetically conductive steel material, or a reed made of copper material.

4. An electric load switch according to claim 2, characterized in that: The moving contact assembly is provided with a copper conductor, and an elastic member is provided at the periphery corresponding to the copper conductor to act on the moving contact assembly.

5. An electric load switch according to claim 4, characterized in that: The soft wire is arranged on the copper conductor.

6. The electric load switch according to claim 2, characterized in that: The central axis of the motor assembly and the central axis of the silver alloy contact and / or the alloy contact are arranged in a staggered manner or on the same plane.

7. An electric load switch according to claim 2, characterized in that: The stationary contact plate is integrated with the conductor and / or the shunt conductor.

8. An electric load switch according to claim 2, characterized in that: The stationary touch plate is integrated with the conductive member.

9. An electric load switch according to claim 2, characterized in that: A connecting rod is directly or indirectly connected between the gear assembly and the moving contact driving part.

10. An electric load switch according to claim 9, characterized in that: The motor assembly, the gear assembly, and the connecting rod drive the moving contact assembly to rotate and electrically connect and disconnect the moving contact assembly.

11. The electric load switch according to claim 1, characterized in that: At least one inner side of the insulating housing is provided with a shaft for rotating the moving contact assembly and at least one shaft for rotating the gear assembly.

12. The electric load switch according to claim 11, characterized in that: The shaft for the moving contact to rotate and at least one shaft for the transmission gear assembly to rotate are arranged in a staggered manner at high and low levels or at the same height.

13. An electric load switch according to claim 1, characterized in that: The soft wire is a wire composed of thin copper sheet or multiple strands of fine copper wires.

14. An electric load switch according to claim 1, characterized in that: The extension direction of the motor assembly is arranged in the same direction as the axial direction of the conductor and / or the shunt conductor or is arranged at an angle of 75° to 125°.

15. An electric load switch according to claim 1, characterized in that: The shunt conductor is a component formed by connecting a plurality of metals of different materials.

16. An electric load switch according to claim 1, characterized in that: The moving contact assembly is arranged between the stationary contact assembly and the conductor or / and the shunt conductor.

17. An electric load switch according to claim 16, characterized in that: The motor assembly is laterally arranged above or below the moving contact assembly.

18. An electric load switch according to claim 16, characterized in that: The motor assembly is longitudinally arranged at one side of the stationary contact assembly and is arranged opposite to the moving contact assembly.

19. An electric load switch according to claim 1, characterized in that: The moving contact assembly is arranged on one side of the stationary contact assembly and the conductor or / and the shunt conductor.

20. An electric load switch according to claim 19, characterized in that: The motor assembly is longitudinally arranged on a side opposite to the stationary contact assembly and the conductor or / and the shunt conductor with the moving contact assembly as a relative center.

21. An electric load switch according to claim 1, characterized in that: The moving contact assembly is arranged in front of the stationary contact assembly and the conductor or / and the shunt conductor.

22. An electric load switch according to claim 21, characterized in that: The motor assembly is arranged transversely in front of or behind the stationary contact assembly.

23. An electric load switch according to claim 1, characterized in that: The insulating shell is divided into an upper cavity and a lower cavity.

24. An electric load switch according to claim 23, characterized in that: The moving contact assembly and the stationary contact assembly are arranged in the upper cavity, and the motor assembly and the gear assembly are arranged in the lower cavity.

25. An electric load switch according to claim 1, characterized in that: The gear assembly is partially or entirely arranged between the motor assembly and the moving contact assembly.

26. An electric load switch according to claim 1, characterized in that: The electric load switch is single-pole or three-pole.

27. An electric load switch according to claim 26, characterized in that: The single-pole electric load switch is provided with at least two power supply terminals.

28. An electric load switch according to claim 26, characterized in that: The three-pole electric load switch is provided with at least six power terminals.

29. An electric load switch according to claim 1, characterized in that: The electric load switch is provided with a control power input terminal.

30. An electric load switch according to claim 1, characterized in that: The electric load switch is provided with an arc extinguishing chamber.

31. An electric load switch according to claim 30, characterized in that: The arc extinguishing chamber includes at least one magnetic material sheet.

32. An electric load switch according to claim 1, characterized in that: The moving contact assembly and the stationary contact assembly are both provided with an arc striking angle.

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