Magnetic system and load switch

Abstract

The utility model provides a magnetic system and a load switch, and relates to the technical field of low-voltage apparatuses, the magnetic system comprises a magnetic component and a second shielding structure, the magnetic component comprises a coil assembly and a magnetic rotation assembly, and the second shielding structure is fixedly connected to one side, facing a contact system, of the magnetic rotation assembly. The coil assembly is electrified to drive the magnetic rotation assembly and the second shielding structure to rotate synchronously so as to drive the contact system to open and close. When the coil assembly drives the magnetic rotation assembly to rotate, as the second shielding structure and the magnetic rotation assembly are fixedly connected, the second shielding structure and the magnetic rotation assembly rotate synchronously, the shielding effect of the second shielding structure on the magnetic component can be guaranteed, and the magnetic component is not affected by an external magnetic source; in addition, the second shielding structure does not interfere with the movement of the magnetic rotation assembly, the spatial layout is reasonable, the occupied space is further saved, and the overall size of the magnetic system is reduced.

Description

Technical Field

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

[0002] Load switches are commonly used electrical devices that operate by electromagnetically driving a contact system through a magnetic system. However, the magnetic system within a load switch is susceptible to interference from external magnetic fields, which can affect its operation and further compromise the normal opening and closing functions of the contact system.

[0003] To solve this problem, a common method is to use a magnetic shielding structure to shield external magnetic interference. However, the current magnetic shielding structure has poor shielding effect and occupies a large space, affecting the overall performance of the product. Utility Model Content

[0004] The purpose of this application is to provide a magnetic system and a load switch to address the deficiencies in the above-mentioned prior art, which can effectively improve the shielding effect and reduce space occupation.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In one aspect of an embodiment of the present application, a magnetic system is provided, comprising: a magnetic component and a second shielding structure, the magnetic component comprising a coil assembly and a magnetic rotating assembly, the second shielding structure being fixedly connected to a side of the magnetic rotating assembly facing the contact system, and the coil assembly being energized to drive the magnetic rotating assembly and the second shielding structure to rotate synchronously, thereby driving the contact system to open and close.

[0007] Optionally, a first shielding structure is further included, wherein the first shielding structure and the second shielding structure together form a shielding cavity, the magnetic component is arranged in the shielding cavity, and the shielding cavity wraps the magnetic component.

[0008] Optionally, the first shielding structure includes two oppositely arranged covers, and when the two covers are relatively buckled together, the first shielding structure forms a rectangular body with at least four shielding surfaces, and the rectangular body also forms an opening.

[0009] Optionally, the second shielding structure is a shielding plate, which is located at the opening so that the shielding cavity forms at least five shielding surfaces; the two covers are respectively formed with bending portions extending toward the shielding plate at the opening, and the shielding plate is located between the bending portions on both sides to reduce the air gap between the first shielding structure and the shielding plate.

[0010] Optionally, a third shielding structure is further included, which is located in the opening to be connected to the first shielding structure. The third shielding structure and the first shielding structure enclose at least five shielding surfaces. The magnetic component and the second shielding structure are both located in the enclosed area of the third shielding structure and the first shielding structure. The third shielding structure is arranged between the moving contact and the static contact of the contact system.

[0011] Optionally, the cover body includes a first shielding plate, a second shielding plate and a third shielding plate that are perpendicular to each other and interconnected. The first shielding plates of the two covers are arranged opposite to each other, and the two second shielding plates and the two third shielding plates are spliced correspondingly; the second shielding structure and the two second shielding plates are arranged along the first direction, and the two third shielding plates and the coil assembly are arranged along the second direction.

[0012] Optionally, the magnetic rotation assembly includes a permanent magnet, and a first armature and a second armature arranged on both sides of the permanent magnet relative to each other along a first direction, the first armature is close to the contact system along the first direction, and the permanent magnet, the first armature and the second armature are fixed by a mounting member; the second shielding structure is arranged on the side of the first armature away from the permanent magnet, and is connected to the magnetic rotation assembly through the mounting member.

[0013] In one aspect of an embodiment of the present application, a magnetic system is provided, comprising: a shell, a contact system, and the above-mentioned magnetic system, wherein the coil assembly of the magnetic system is energized to drive the magnetic rotating assembly of the magnetic system to rotate, so as to drive the contact system to open and close; the contact system and the magnetic system are arranged along a first direction, and the second shielding structure, the magnetic rotating assembly and the coil assembly are arranged in sequence along the first direction.

[0014] Optionally, the load switch is installed inside the electric meter, the first shielding structure of the magnetic system is sleeved outside the shell, and a limiting structure is also provided between the first shielding structure and the shell, so that the first shielding structure covers at least part of the shell and cooperates with the shell in a limited manner; the third shielding plate of the first shielding structure is located on the side of the load switch close to the terminal of the electric meter.

[0015] Optionally, the limiting structure includes a groove provided on the magnetic system and a boss provided on the shell, and the groove and the boss cooperate to limit the position.

[0016] The beneficial effects of this application include:

[0017] The present application provides a magnetic system and a load switch. The magnetic component is used to provide an electromagnetic force to drive the contact system to operate. The magnetic component includes a coil assembly and a magnetic rotating assembly. When the coil assembly is energized, the magnetic rotating assembly rotates, thereby driving the contact system to open and close. A second shielding structure is also fixedly connected to the magnetic rotating assembly, and the second shielding structure faces one side of the contact system. When the coil assembly drives the magnetic rotating assembly to rotate, since the second shielding structure and the magnetic rotating assembly are fixedly connected, the second shielding structure and the magnetic rotating assembly rotate synchronously, which can ensure the shielding effect of the second shielding structure on the magnetic component, so that the magnetic component is not affected by external magnetic sources, and the second shielding structure will not interfere with the movement of the magnetic rotating assembly. The spatial layout is reasonable, further saving space occupation and reducing the overall volume of the magnetic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic structural diagram of a first embodiment of a magnetic system provided in an embodiment of the present application;

[0020] Figure 2 An exploded schematic diagram of a first embodiment of a magnetic system provided in an embodiment of the present application;

[0021] Figure 3a A schematic diagram of a first shielding structure of a magnetic system embodiment 1 provided in an embodiment of the present application;

[0022] Figure 3b A schematic diagram of a shielding cavity formed by cooperation of a first shielding structure and a second shielding structure of a magnetic system according to a first embodiment of the present application;

[0023] Figure 4 A schematic diagram of the structure of a magnetic component of a magnetic system provided in an embodiment of the present application;

[0024] Figure 5 A schematic structural diagram of a second embodiment of a magnetic system provided in an embodiment of the present application;

[0025] Figure 6 A schematic diagram of the coordinated structure of the first shielding structure and the third shielding structure of a second embodiment of a magnetic system provided in an embodiment of the present application;

[0026] Figure 7a A schematic diagram of the appearance and structure of a load switch provided in an embodiment of the present application;

[0027] Figure 7b A schematic diagram of the explosion structure of a load switch provided in an embodiment of the present application;

[0028] Figure 8 A schematic diagram of the internal structure of a load switch embodiment 1 provided in an embodiment of the present application;

[0029] Figure 9 A schematic diagram of the internal structure of a load switch embodiment 2 provided in an embodiment of the present application;

[0030] Figure 10 A schematic diagram of the structure of an electric meter provided in an embodiment of the present application.

[0031] Icons: 10-magnetic system; 10a-shielding cavity; 11-first shielding structure; 11a-opening; 110-housing; 111-first shielding plate; 111a-bending portion; 111b-groove; 112-second shielding plate; 113-third shielding plate; 12-second shielding structure; 13-magnetic component; 131-coil assembly; 131a-coil; 131b-coil skeleton; 131c.1-first yoke; 131d.1-first extension portion; 131c.2-second yoke; 131 d.2-second extension; 132-magnetic rotating assembly; 132a-mounting part; 132b.1-first armature; 132b.2-second armature; 132c-protrusion; 14-third shielding structure; 20-load switch; 201-housing; 201a-boss; 202-contact system; 202a-base; 202b-moving contact; 202c-static contact; 21-pull rod; 22-micro switch; 30-electricity meter; 301-terminal; F1-first direction; F2-second direction. DETAILED DESCRIPTION

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] 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 as claimed, but merely represents selected embodiments of the present application. It should be noted that, unless there is a conflict, the various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0037] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to mechanical or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this application.

[0038] In one aspect of the embodiment of the present application, referring to Figure 1 、 Figure 2 , provides a magnetic system 10, including a magnetic component 13 and a second shielding structure 12, the magnetic component 13 includes a coil assembly 131 and a magnetic rotating assembly 132, the second shielding structure 12 is fixedly connected to the side of the magnetic rotating assembly 132 facing the contact system 202, and the coil assembly 131 is energized to drive the magnetic rotating assembly 132 and the second shielding structure 12 to rotate synchronously, so as to drive the contact 202b system to open and close.

[0039] The magnetic component 13 is used to provide electromagnetic force to drive the contact system 202 to operate. When the coil assembly 131 is energized, the magnetic rotating assembly 132 is driven to rotate, thereby driving the contact system 202 to open and close.

[0040] A pull rod 21 is provided between the contact system 202 and the magnetic system 10 . When the magnetic rotating assembly 132 rotates, the magnetic rotating assembly 132 drives the pull rod 21 to move, thereby driving the contact system 202 to open or close.

[0041] In addition, the second shielding structure 12 is also fixedly connected to the magnetic rotating assembly 132. The fixed connection includes a detachable fixed connection, such as plug-in, snap-on connection, etc., and may also include a non-detachable fixed connection, such as welding, bonding or integral molding, etc.; for example, in the present application, the second shielding structure 12 and the magnetic rotating assembly 132 can be set as one piece; the second shielding structure 12 faces the side of the contact system 202. When the coil assembly 131 drives the magnetic rotating assembly 132 to rotate, since the second shielding structure 12 and the magnetic rotating assembly 132 are fixedly connected, the second shielding structure 12 and the magnetic rotating assembly 132 rotate synchronously at this time, which can ensure the shielding effect of the second shielding structure 12 on the magnetic component 13, so that the magnetic component 13 is not affected by external magnetic sources, and the second shielding structure 12 will not interfere with the movement of the magnetic rotating assembly 132. The spatial layout is reasonable, space occupancy is saved, and the overall volume of the magnetic system 10 is reduced.

[0042] Furthermore, the magnetic system 10 also includes a first shielding structure 11. The first shielding structure 11 and the second shielding structure 12 enclose a shielding cavity 10a. The magnetic component 13 is arranged in the shielding cavity 10a. The shielding cavity 10a wraps the magnetic component 13 to achieve magnetic field shielding of the magnetic component 13.

[0043] Shielding cavity 10a is formed by the enclosed first and second shielding structures 11, 12. These structures shield different surfaces of magnetic component 13, shielding magnetic field interference from all directions, further enhancing the shielding effectiveness of the shielding cavity. Both first and second shielding structures 11, 12 are single-layer structures, and the enclosed shielding cavity 10a is also a single-layer cavity, reducing space usage.

[0044] For example, Figure 3b As shown, the shielding cavity 10a of the present application forms a spatially rectangular cavity structure with at least five shielding surfaces. The magnetic system 10 is located within the shielding cavity 10a, which has at least five magnetic shielding surfaces. The shielding cavity 10a can shield magnetic field interference from all directions of the magnetic component 13. Compared with existing U-shaped or L-shaped shielding, the shielding cavity 10a formed in the present application has more shielding surfaces, and the area where the magnetic component 13 is exposed in the shielding cavity 10a is less, resulting in better sealing, which significantly improves the shielding effectiveness of the shielding cavity 10a.

[0045] Among them, reference Figure 4The magnetic rotating assembly 132 includes a permanent magnet, and a first armature 132b.1 and a second armature 132b.2 relatively arranged on both sides of the permanent magnet along the first direction F1. The permanent magnet, the first armature 132b.1 and the second armature 132b.2 are fixed by a mounting member 132a, and the permanent magnet is located inside the mounting member 132a; the second shielding structure 12 is arranged on the side of the first armature 132b.1 away from the permanent magnet, and is connected to the magnetic rotating assembly 132 through the mounting member 132a.

[0046] For example, the first armature 132b.1 and the second armature 132b.2 extend out of the mounting member 132a at both ends along the second direction F2. The permanent magnet can lock the first armature 132b.1 and the second armature 132b.2, provide a holding force of the magnetic field, and achieve a steady-state balance of the magnetic rotating assembly 132.

[0047] The first armature 132b.1 is arranged close to the contact system 202 along the first direction F1, and a protrusion 132c is formed on the side of the mounting member 132a facing the contact system 202. The protrusion 132c is used to drive the micro switch 22 on one side of the contact system 202, and the opening and closing status of the contact system 202 is detected by the micro switch 22; the second shielding structure 12 is located between the protrusion 132c and the first armature 132b.1.

[0048] For example, the permanent magnet, the first armature 132b.1, the second armature 132b.2, the protrusion 132c, and the second shielding structure 12 can be integrally formed by injection molding to facilitate installation. Of course, they can also be connected and installed in other ways, which are not limited here.

[0049] The coil assembly 131 includes a coil skeleton 131b and a coil 131a arranged on the coil skeleton 131b. The coil skeleton 131b is also provided with a first magnetic yoke 131c.1 and a second magnetic yoke 131c.2 which are arranged opposite to each other along the second direction F2. The first magnetic yoke 131c.1 has a first extension portion 131d.1, and the second magnetic yoke 131c.2 has a second extension portion 131d.2. The first extension portion 131d.1 and the second extension portion 131d.2 extend respectively to between the protruding ends of the first armature 132b.1 and the second armature 132b.2.

[0050] Figure 4The first direction F1 is the left-right direction, and the second direction F2 is the up-down direction, with the first and second directions F1 and F2 being perpendicular. The first and second armatures 132b.1 and 132b.2 are arranged horizontally, with their upper and lower ends extending beyond the mounting member 132a. The first and second magnetic yokes 131c.1 and 131c.2 are arranged vertically. The first extension 131d.1 of the upper first magnetic yoke 131c.1 extends downward to between the upper ends of the first and second armatures 132b.1, 132b.2. The second extension 131d.2 of the lower second magnetic yoke 131c.2 extends upward to between the lower ends of the first and second armatures 132b.1, 132b.2.

[0051] When the coil 131a is energized to generate a magnetic field, the magnetic field is transmitted to the first armature 132b.1 and the second armature 132b.2 through the first magnetic yoke 131c.1 and the second magnetic yoke 131c.2, thereby driving the magnetic rotating assembly 132 to rotate.

[0052] After the magnetic rotating assembly 132 rotates, refer to Figure 4 In this state, the first extension portion 131d.1 of the first magnetic yoke 131c.1 abuts against the upper end of the first armature 132b.1, and the second extension portion 131d.2 of the second magnetic yoke 131c.2 abuts against the lower end of the second armature 132b.2 to transfer the magnetic field, and at the same time, the rotation of the magnetic rotating component 132 can be limited.

[0053] Similarly, when the magnetic rotating assembly 132 is driven to rotate in the reverse direction, the first extension portion 131d.1 of the first magnetic yoke 131c.1 abuts against the upper end of the second armature 132b.2, and the second extension portion 131d.2 of the second magnetic yoke 131c.2 abuts against the lower end of the first armature 132b.1.

[0054] Specifically, if Figure 3a 、 Figure 3b As shown, the first shielding structure 11 includes two oppositely disposed covers 110 . When the two covers 110 are relatively buckled together, the first shielding structure 11 forms a rectangular body with at least four shielding surfaces. The rectangular body also forms an opening 11 a .

[0055] In some embodiments of the present application, the second shielding structure 12 is a shielding plate, which is located in the opening 11 a of the rectangular body, so that the shielding cavity 10 a forms at least five shielding surfaces.

[0056] The two covers 110 are buckled together to form a first shielding structure 11. For example, the first shielding structure 11 forms a rectangular body in space, and the rectangular body has four shielding surfaces to form a semi-enclosed spatial structure; the first shielding structure 11 also has at least one opening 11a, and a second shielding structure 12 is arranged at the opening 11a. The second shielding structure 12 can be a shielding plate, and the shielding plate can serve as a shielding surface to close the opening 11a, thereby forming a shielding cavity 10a with at least five shielding surfaces.

[0057] Reference Figure 3a As shown, the cover body 110 includes a first shielding plate 111 , a second shielding plate 112 and a third shielding plate 113 that are perpendicular to each other and connected to each other.

[0058] Each cover body 110 has three shielding surfaces. After the two cover bodies 110 are spliced relative to each other, the first shielding plates 111 of the two cover bodies 110 are arranged opposite to each other, the second shielding plates 112 of the two cover bodies 110 are spliced correspondingly, and the third shielding plates 113 of the two cover bodies 110 are spliced correspondingly, so that the formed first shielding structure 11 has four shielding surfaces.

[0059] The second shielding structure 12 and the two second shielding plates 112 are disposed along the first direction F1 , and the two third shielding plates 113 and the coil assembly 131 are disposed along the second direction F2 .

[0060] Based on this, the magnetic system 10 can also be configured as a structure with shielding on all six surfaces; the specific distance is determined by the distance between each surface of the magnetic system 10 and the external magnetic source of the electric meter 30.

[0061] like Figure 3b As shown, the two covers 110 are respectively formed with bent portions 111 a facing the shielding plate at the openings 11 a , and the shielding plate is located between the bent portions 111 a on both sides.

[0062] The opening 11a is located on the opposite side of the second shielding plate 112. The first shielding plate 111 is connected to the second shielding plate 112 along the side of the first direction F1. A bending portion 111a is formed on the other side of the first shielding plate 111. The bending portion 111a extends to the opposite side of the second shielding plate 112, that is, the opening 11a. The shielding plate is clamped between the bending portions 111a on both sides, which can reduce the air gap when the first shielding structure 11 and the shielding plate are matched, forming a complete magnetic circuit, reducing magnetic resistance, and improving the shielding effect.

[0063] In other embodiments of the present application, Figure 5 、 Figure 6As shown, the magnetic system 10 also includes a third shielding structure 14, which is located in the opening 11a to connect with the first shielding structure 11; for example, in the present application, the third shielding structure 14 is two parallel iron plates, and the two iron plates are inserted into the two first shielding plates 111 opposite to the first shielding structure 11; in this way, the first shielding structure 11 and the third shielding structure 14 are tightly connected, and the air gap between the two when they are matched can also be reduced to improve the shielding effect.

[0064] The third shielding structure 14 and the first shielding structure 11 enclose at least five shielding surfaces, and the magnetic component 13 and the second shielding structure 12 are both located in the enclosed area of the third shielding structure 14 and the first shielding structure 11. In this way, based on the above embodiment, the shielding effect can be further enhanced.

[0065] like Figure 9 As shown, the third shielding structure 14 is disposed between the movable contact 202b and the stationary contact 202c of the contact system 202. The two iron plates forming the third shielding structure 14 are substantially located between the movable contact 202b and the stationary contact 202c. One function of the third shielding structure 14 is to increase the attractive force between the movable contact 202b and the stationary contact 202c, while reducing the repulsive force between the movable contact 202b and the stationary contact 202c, thereby improving the reliable contact between the movable contact 202b and the stationary contact 202c. Another function is to further enhance the shielding effect on the magnetic component 13. The third shielding structure 14 can simultaneously serve two purposes.

[0066] On the other hand, refer to Figure 7a 、 Figure 8 、 Figure 9 As shown, the embodiment of the present application also discloses a load switch 20, which is installed inside the electric meter 30. The load switch 20 includes a shell 201, a contact system 202, and a magnetic system 10 as any one of the above items. The coil component 131 of the magnetic system 10 is energized to drive the magnetic rotating component 132 of the magnetic system 10 to rotate, so as to drive the contact 202b system to open and close.

[0067] The contact system 202 and the magnetic system 10 are arranged side by side along the first direction F1, and the second shielding structure 12, the magnetic rotating assembly 132 and the coil assembly 131 are arranged in sequence along the first direction F1. Figure 8 It can be seen that the second shielding structure 12 is specifically arranged between the first armature 132b.1 and the moving contact 202b; when the coil assembly 131 is energized, it drives the magnetic rotating assembly 132 to rotate. During the rotation process, the magnetic rotating assembly 132 drives the pull rod 21 to drive the base 202a of the contact system 202 to move. The moving contact 202b is set on the base 202a, and the moving contact 202b is driven to open and close the static contact 202c.

[0068] The first shielding structure 11 of the magnetic system 10 is sleeved on the outside of the shell 201. The first shielding structure 11 of the magnetic system 10 is flush with the outer surface of the shell 201, which reduces the overall height of the load switch 20 while ensuring the magnetic shielding effect of the load switch 20; a limiting structure is also provided between the magnetic system 10 and the shell 201 to limit the magnetic system 10 and the shell 201, and limit the magnetic system 10 in the shell 201 to ensure that both are firmly installed.

[0069] For example, Figure 7b As shown, the limiting structure includes a groove 111b provided on the first shielding structure 11 of the magnetic system 10 and a boss 201a provided on the housing 201, and the groove 111b and the boss 201a cooperate to limit the position.

[0070] The first shielding structure 11 has two opposite first shielding plates 111 , one of which is formed with a groove 111 b that cooperates with the boss 201 a of the housing 201 to achieve positioning.

[0071] Furthermore, the third shielding plate 113 of the first shielding structure 11 is located on the side of the load switch 20 close to the terminal 301 of the electric meter 30, so that the first shielding structure 11 covers the side of the load switch 20 close to the terminal 301 of the electric meter 30. The load switch 20 is set in the electric meter 30, which can be referred to Figure 10 In the second direction F2, the terminal 301 of the electric meter 30 is located below the load switch 20, and the third shielding plate 113 is located at the bottom and close to the terminal 301 below.

[0072] exist Figure 10 In the example, the load switch 20 is applied to the electric meter 30. Since the top of the magnetic system 10 is far away from the top of the electric meter 30, and the other five shielding surfaces are close to the corresponding surfaces of the electric meter 30, the present application uses at least five shielding surfaces to shield the interference of magnetic sources outside the electric meter 30.

[0073] The load switch comprises the same structure and benefits as the magnetic system 10 in the aforementioned embodiment. The structure and benefits of the magnetic system 10 have been described in detail in the aforementioned embodiment and will not be repeated here.

[0074] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A magnetic system (10), characterized in that The invention comprises a magnetic component (13) and a second shielding structure (12), wherein the magnetic component (13) comprises a coil assembly (131) and a magnetic rotating assembly (132), and the second shielding structure (12) is fixedly connected to a side of the magnetic rotating assembly (132) facing the contact system (202). When the coil assembly (131) is energized, the magnetic rotating assembly (132) and the second shielding structure (12) are driven to rotate synchronously, thereby driving the contact system (202) to open and close.

2. The magnetic system (10) according to claim 1, characterized in that The invention also includes a first shielding structure (11), wherein the first shielding structure (11) and the second shielding structure (12) enclose a shielding cavity (10a), the magnetic component (13) is arranged in the shielding cavity (10a), and the shielding cavity (10a) wraps the magnetic component (13).

3. The magnetic system (10) according to claim 2, characterized in that The first shielding structure (11) comprises two oppositely arranged covers (110). When the two covers (110) are relatively buckled together, the first shielding structure (11) forms a rectangular body with at least four shielding surfaces, and the rectangular body also forms an opening (11a).

4. The magnetic system (10) according to claim 3, characterized in that The second shielding structure (12) is a shielding plate, and the shielding plate is located in the opening (11a), so that the shielding cavity (10a) forms at least five shielding surfaces; The two covers (110) are respectively formed with bent portions (111a) extending toward the shielding plate at the openings (11a), and the shielding plate is located between the bent portions (111a) on both sides to reduce the air gap between the first shielding structure (11) and the shielding plate.

5. The magnetic system (10) according to claim 3, characterized in that The invention also includes a third shielding structure (14), wherein the third shielding structure (14) is located in the opening (11a) to be connected to the first shielding structure (11), and the third shielding structure (14) and the first shielding structure (11) enclose at least five shielding surfaces, and the magnetic component (13) and the second shielding structure (12) are both located in the enclosed area of the third shielding structure (14) and the first shielding structure (11), and the third shielding structure (14) is arranged between the moving contact (202b) and the static contact (202c) of the contact system (202).

6. The magnetic system (10) according to claim 3, characterized in that The cover body (110) comprises a first shielding plate (111), a second shielding plate (112) and a third shielding plate (113) which are perpendicular to each other and connected to each other; the first shielding plates (111) of the two cover bodies (110) are arranged opposite to each other, and the two second shielding plates (112) and the two third shielding plates (113) are respectively spliced together; the second shielding structure (12) and the two second shielding plates (112) are arranged along a first direction (F1), and the two third shielding plates (113) and the coil assembly (131) are arranged along a second direction (F2).

7. The magnetic system (10) according to any one of claims 1 to 6, characterized in that The magnetic rotating assembly (132) includes a permanent magnet, and a first armature (132b.1) and a second armature (132b.2) arranged on both sides of the permanent magnet relative to each other along a first direction (F1), the first armature (132b.1) approaches the contact system (202) along the first direction (F1), and the permanent magnet, the first armature (132b.1) and the second armature (132b.2) are fixed by a mounting member (132a); the second shielding structure (12) is arranged on a side of the first armature (132b.1) away from the permanent magnet, and is connected to the magnetic rotating assembly (132) through the mounting member (132a).

8. A load switch, characterized in that: The invention comprises a housing (201), a contact system (202), and a magnetic system (10) according to any one of claims 1 to 7, wherein the coil component (131) of the magnetic system (10) is energized to drive the magnetic rotating component (132) of the magnetic system (10) to rotate, thereby driving the contact system (202) to open and close; The contact system (202) and the magnetic system (10) are arranged along a first direction (F1), and the second shielding structure (12), the magnetic rotating assembly (132), and the coil assembly (131) are arranged in sequence along the first direction (F1).

9. The load switch according to claim 8, characterized in that: The load switch (20) is installed inside the electric meter (30); the first shielding structure (11) of the magnetic system (10) is sleeved outside the shell (201), and a limiting structure is provided between the first shielding structure (11) and the shell (201), so that the first shielding structure (11) covers at least a portion of the shell (201) and is limitedly matched with the shell (201); and the third shielding plate (113) of the first shielding structure (11) is located on a side of the load switch (20) close to the connection terminal (301) of the electric meter (30).

10. The load switch according to claim 9, characterized in that: The limiting structure comprises a groove (111b) provided on the magnetic system (10) and a boss (201a) provided on the housing (201), and the groove (111b) and the boss (201a) cooperate to limit the position.

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