Magnetic system and load switch
By designing a magnetic system with the dynamic iron core located between the static iron core in the load switch, the magnetic field provided by the permanent magnet and the driving force of the elastic parts are used to solve the problem of insufficient initial suction force of the dynamic iron core and the static iron core, and the response agility and customer satisfaction of the load switch are improved.
Patent Information
- Application Number
- CN202420290149.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-08
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-02-08
AI Technical Summary
In the existing load switches, the initial suction force of the dynamic iron core and the static iron core is small, resulting in inaccurate reactions and affecting the customer's experience.
A magnetic system is designed, and the dynamic iron core is located between the first static iron core and the second static iron core. The first permanent magnet and the second permanent magnet are arranged on the outer periphery of the dynamic iron core. The movement of the dynamic iron core is driven by a magnetic field, and elastic members are provided at both ends of the dynamic iron core to provide additional driving force to assist in the absorption and integration of the dynamic iron core.
Through the enhanced magnetic field action and the driving force of the elastic parts, the absorption force of the dynamic iron core and the static iron core are improved, the response agility of the load switch is significantly improved, and the satisfaction of customers is improved.
Smart Images
Figure CN222637164U_ABST
Abstract
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] A load switch is a switching device used to control the load of a circuit. It is usually used to switch loads such as electrical equipment, lamps or motors for switching operations and control. A load switch is usually composed of an electromagnetic coil, a moving iron core, a stationary iron core and contacts. When the electromagnetic coil is energized, the magnetic field generated will cause the moving iron core and the stationary iron core to attract and trigger the contacts to attract or separate, thereby opening or closing the circuit. In current load switches, the initial attraction force of the moving iron core and the stationary iron core is small, making it difficult to attract the contacts as quickly as possible, resulting in a slow response of the load switch, which causes a certain degree of inconvenience to customers. Utility Model Content
[0003] The purpose of the present application is to provide a magnetic system and a load switch to address the deficiencies in the above-mentioned prior art, which can assist in the attraction between the moving iron core and the static iron core to improve the response agility of the load switch.
[0004] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:
[0005] In one aspect of an embodiment of the present application, a magnetic system is provided, including a moving iron core and a first stationary iron core and a second stationary iron core respectively located at two ends of the moving iron core, the outer periphery of the moving iron core is also provided with a first permanent magnet and a second permanent magnet relative to each other, and at least one end of the moving iron core is provided with an elastic member.
[0006] Optionally, a contact system is further provided on one side of the magnetic system, and the elastic member is located at an end of the moving iron core away from the contact system.
[0007] Optionally, the ends of the first permanent magnet and the second permanent magnet with the same polarity are arranged opposite to each other, so that the magnetic circuit formed by the first permanent magnet and the magnetic circuit formed by the second permanent magnet are arranged in parallel.
[0008] Optionally, along the moving direction of the moving iron core, at least one of the two ends of the moving iron core, the two ends of the first static iron core, and the two ends of the second static iron core is provided with a groove.
[0009] Optionally, a contact system is also provided on one side of the magnetic system, the second static iron core is close to the contact system, the first static iron core and the second static iron core respectively form a first groove at one end facing the moving iron core, and the moving iron core forms a second groove at one end facing the first static iron core.
[0010] Optionally, the magnetic system further includes a push rod, the push rod is inserted through the first static iron core, the second static iron core and the moving iron core, and the elastic member is sleeved on the push rod.
[0011] Optionally, a guide cylinder is further sleeved on the end of the push rod close to the first static iron core.
[0012] Optionally, the magnetic system further comprises a skeleton, the first static iron core, the second static iron core, the moving iron core, the first permanent magnet and the second permanent magnet are all arranged in the skeleton, and the first coil and the second coil are respectively sleeved at positions corresponding to the first static iron core and the second static iron core outside the skeleton;
[0013] A yoke is also provided outside the skeleton, and the yoke includes a first yoke and a second yoke, the second yoke is U-shaped, the first yoke is closed in the U-shaped opening, and the first yoke and the second yoke are arranged along the moving direction of the moving iron core.
[0014] Optionally, a magnetic shielding cover is further provided outside the magnetic yoke, and the magnetic shielding cover includes a first shielding cover and a second shielding cover which are relatively sleeved to close the magnetic yoke, and the first shielding cover and the second shielding cover are respectively arranged along the relative directions of the first permanent magnet and the second permanent magnet.
[0015] On the other hand, an embodiment of the present application provides a load switch, including a contact system and the above-mentioned magnetic system located on one side of the contact system, wherein the magnetic system includes a first yoke, a second yoke, a first static iron core and a second static iron core located between the first yoke and the second yoke, a moving iron core located between the first static iron core and the second static iron core, and a push rod linked to the moving iron core, wherein the moving iron core drives the push rod to push the contact system to drive the contact system to open and close.
[0016] The beneficial effects of this application include:
[0017] The present application provides a magnetic system and a load switch, wherein the moving iron core is located between the first static iron core and the second static iron core, and the first permanent magnet and the second permanent magnet are also arranged on the outer periphery of the moving iron core, and the first permanent magnet and the second permanent magnet are arranged relative to each other to wrap the moving iron core, and the first permanent magnet and the second permanent magnet provide a magnetic field for the moving iron core to maintain and a magnetic field for driving the moving iron core to move after the moving iron core moves halfway; through the action of the magnetic field, the moving iron core moves toward the first static iron core or the second static iron core to drive the contact system to open and close; at least one end of the two ends of the moving iron core facing the first static iron core and the second static iron core is provided with an elastic member. The elastic force generated by the elastic member can provide an instantaneous driving force to assist the moving iron core to move, so as to attract the first static iron core and the second static iron core on both sides respectively, solve the problem of small initial attraction force of the moving iron core and the static iron core, and further improve the stability of the magnetic system, thereby improving the responsiveness of the load switch and improving customer satisfaction. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 A schematic diagram of the structure of a magnetic system provided in an embodiment of the present application;
[0020] Figure 2 One of the exploded structural schematic diagrams of a magnetic system provided in an embodiment of the present application;
[0021] Figure 3 A second schematic diagram of an exploded structure of a magnetic system provided in an embodiment of the present application;
[0022] Figure 4 One of the partial structural schematic diagrams of a magnetic system provided in an embodiment of the present application;
[0023] Figure 5 A second schematic diagram of a partial structure of a magnetic system provided in an embodiment of the present application;
[0024] Figure 6 A third schematic diagram of a partial structure of a magnetic system provided in an embodiment of the present application;
[0025] Figure 7 A schematic diagram of the structure of a load switch provided in an embodiment of the present application.
[0026] Icons: 10-magnetic system; 110-top rod; 111a-first yoke; 111b-second yoke; 112a-first coil; 112b-second coil; 113a-first static iron core; 113b-second static iron core; 1130-first groove; 114-elastic member; 115a-first permanent magnet; 115b-second permanent magnet; 116-moving iron core; 1160-second groove; 117-guide cylinder; 118-skeleton; 118a-rectangular body; 118b-sleeve; 121-first shielding cover; 122-second shielding cover; 20-contact system. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.
[0029] 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, further definition and explanation thereof is not required in subsequent drawings.
[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0032] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0033] In one aspect of the embodiment of the present application, please refer to Figure 1 to Figure 3 As shown, a magnetic system 10 is provided, including a moving iron core 116 and a first static iron core 113a and a second static iron core 113b respectively located at two ends of the moving iron core 116, and the outer periphery of the moving iron core 116 is also provided with a first permanent magnet 115a and a second permanent magnet 115b opposite to each other, and an elastic member 114 is provided at at least one end of the moving iron core 116.
[0034] like Figure 4 In the present application, a moving iron core 116 matches two stationary iron cores, and the moving iron core 116 is arranged between the first stationary iron core 113a and the second stationary iron core 113b. Under the action of the magnetic field, the moving iron core 116 moves toward the first stationary iron core 113a or the second stationary iron core 113b.
[0035] For example, Figure 7 As shown, in the present application, the first static iron core 113a is located above the moving iron core 116, and the second static iron core 113b is located below the moving iron core 116. A contact system 20 is also provided on one side of the magnetic system 10, and the second static iron core 113b is close to the direction of the contact system 20. When the moving iron core 116 moves toward the second static iron core 113b and fits with the second static iron core 113b, the push rod 110 linked to the moving iron core 116 will move toward the second static iron core 113b until it pushes the contact system 20, so that the contact system 20 is closed; when the moving iron core 116 moves toward the first static iron core 113a above and fits with it, the push rod 110 moves away from the contact system 20, and the contact system 20 is opened under the action of its contact spring.
[0036] like Figure 3 As shown, in the direction perpendicular to the movement of the moving iron core 116, the first permanent magnet 115a and the second permanent magnet 115b are also arranged on the outer periphery of the moving iron core 116. The first permanent magnet 115a and the second permanent magnet 115b are arranged relatively to wrap the moving iron core 116, and the ends of the first permanent magnet 115a and the second permanent magnet 115b with the same polarity are arranged opposite to each other, so that the magnetic circuit formed by the first permanent magnet 115a and the magnetic circuit formed by the second permanent magnet 115b are arranged in parallel.
[0037] For example Figure 3In the figure, the front end faces of the first permanent magnet 115a and the second permanent magnet 115b are both N poles or both S poles, so that the magnetic circuits formed by the first permanent magnet 115a and the second permanent magnet 115b are respectively presented in a parallel arrangement to provide a magnetic field to the magnetic system 10.
[0038] Furthermore, in the moving direction of the moving iron core 116 , at least one of the two ends of the moving iron core 116 facing the first stationary iron core 113 a and the second stationary iron core 113 b is provided with an elastic member 114 .
[0039] For example, an elastic member 114 may be provided at the upper end of the moving iron core 116, or at the lower end of the moving iron core 116, or at both ends of the moving iron core 116; the purpose of the elastic member 114 is to generate elastic force, which can provide instantaneous driving force to help the moving iron core 116 move quickly in the up and down directions, so that the moving iron core 116 can be easily attracted to the first static iron core 113a and the second static iron core 113b respectively.
[0040] For example, when the moving iron core 116 is quickly attracted to the first static iron core 113a above under the action of elastic force, it can drive the contact system 20 to quickly open the switch; when the moving iron core 116 is quickly attracted to the second static iron core 113b below under the action of elastic force, it can drive the contact system 20 to quickly close the switch.
[0041] In one embodiment, please refer to Figure 3 , the elastic member 114 is located at the end of the moving iron core 116 away from the contact system 20. The second static iron core 113b is arranged close to the contact system 20, and the elastic member 114 is arranged at the end of the moving iron core 116 close to the first static iron core 113a. In this way, when the moving iron core 116 moves toward the second static iron core 113b, the elastic member 114 prompts the moving iron core 116 to quickly attract the second static iron core 113b below, ensuring that the contact system 20 is quickly closed, and can also prompt the contacts to be pressed downward to close the contact system 20 in place.
[0042] Therefore, in the magnetic system 10 provided by the embodiment of the present application, the moving iron core 116 is located between the first static iron core 113a and the second static iron core 113b, and the first permanent magnet 115a and the second permanent magnet 115b are also arranged on the outer periphery of the moving iron core 116. The first permanent magnet 115a and the second permanent magnet 115b are arranged relatively to wrap the moving iron core 116, and the first permanent magnet 115a and the second permanent magnet 115b provide a magnetic field for maintaining the moving iron core 116 and a magnetic field for driving the moving iron core 116 to move after the moving iron core 116 moves halfway; through the action of the magnetic field, the moving iron core 116 moves toward the first static iron core 113a or the second static iron core 113b to drive the contact system 20 to open and close. The setting of two static iron cores and two permanent magnets in the present application improves the stability of the magnetic system 10; and at least one of the two ends of the moving iron core 116 facing the first static iron core 113a and the second static iron core 113b respectively, is provided with an elastic member 114. The elastic force generated by the elastic member 114 can provide instantaneous driving force to assist the movement of the moving iron core 116 so as to be attracted to the first static iron core 113a and the second static iron core 113b on both sides respectively, thereby solving the problem of the small initial attraction force between the moving iron core 116 and the static iron core, and further improving the stability of the magnetic system, thereby improving the response agility of the load switch and improving customer satisfaction.
[0043] Generally, the magnetic force provided by the magnetic field makes the moving iron core 116 approach the static iron core. During this process, the initial attraction force between the moving iron core 116 and the static iron core is small, and the elastic force of the elastic member 114 can help the moving iron core 116 to move and quickly attract the first static iron core 113a and the second static iron core 113b on both sides.
[0044] Furthermore, along the moving direction of the moving iron core 116, at least one of the two ends of the moving iron core 116, the two ends of the first static iron core 113a, and the two ends of the second static iron core 113b is provided with a groove. The arrangement of two static iron cores and two permanent magnets in the present application enables the magnetic system to form a bistable state, and the arrangement of the groove improves the holding force of the bistable magnetic system, thereby improving stability.
[0045] Taking the example of setting a groove in the moving iron core 116, both the moving iron core 116 and the static iron core are cylindrical structures. The setting of the groove is equivalent to digging out a part of the solid at the end of the cylinder to form a groove. The groove allows the magnetic field to move along the outer wall of the cylinder, which can enhance the suction of the magnetic field.
[0046] In this application, if Figures 4 to 6 As shown, the first static iron core 113a and the second static iron core 113b respectively form a first groove 1130 at one end facing the moving iron core 116. Figure 5A second groove 1160 is formed at one end of the middle moving iron core 116 facing the first stationary iron core 113 a , ie, at the end away from the contact system 20 . The second groove 1160 can enhance the magnetic field attraction and also be used to install the elastic member 114 .
[0047] The first static iron core 113a is located above the moving iron core 116, and the first static iron core 113a forms a first groove 1130 toward the lower end of the moving iron core 116. The second static iron core 113b is located below the moving iron core 116, and the second static iron core 113b forms a first groove 1130 toward the upper end of the moving iron core 116, and the moving iron core 116 forms a second groove 1160 toward the upper end of the first static iron core 113a.
[0048] The upper end of the moving iron core 116 is fitted with the lower end of the first static iron core 113a, and the lower end of the moving iron core 116 is fitted with the upper end of the second static iron core 113b. The first groove 1130 and the second groove 1160 extend from their respective end surfaces to the inside of the moving direction of the moving iron core 116, without affecting the end surface fitting of the moving iron core 116 and the static iron core. Figure 4 .
[0049] The magnetic system 10 further includes a push rod 110 , which penetrates the first static iron core 113 a , the second static iron core 113 b and the moving iron core 116 , and an elastic member 114 is sleeved on the push rod 110 ; for example, the elastic member 114 may be a spring.
[0050] The first static iron core 113a and the second static iron core 113b are fixedly arranged, and the moving iron core 116 and the top rod 110 move in linkage; Figure 3 The push rod 110 passes through the structure of the entire magnetic system 10, and the lower end of the push rod 110 is linked with the contact system 20. When the push rod 110 moves downward under the drive of the moving iron core 116, the push rod 110 can push the contact system 20 to achieve closing; when the push rod 110 moves upward under the drive of the moving iron core 116, the push rod 110 leaves the contact system 20, and the contact system 20 is opened under the action of the contact spring.
[0051] The moving iron core 116, the first static iron core 113a and the second static iron core 113b are respectively provided with connected axial holes, and the push rod 110 is penetrated in the axial holes so that the push rod 110 passes through the first static iron core 113a, the moving iron core 116 and the second static iron core 113b in sequence through the axial holes.
[0052] Figure 5 A guide cylinder 117 is also sleeved on the upper end of the push rod 110 away from the contact system 20. The guide cylinder 117 is adapted to the axial hole of the first static iron core 113a so that when the moving iron core 116 approaches the first static iron core 113a, the push rod 110 can be guided into the first static iron core 113a through the guide cylinder 117.
[0053] The guide tube 117 can provide a guiding force to the ejector rod 110 and the moving iron core 116, avoiding the offset of the moving iron core 116, preventing the distances between the moving iron core 116 and the first permanent magnets 115a and the second permanent magnets 115b on the left and right sides from being too small to cause contact, and preventing the moving iron core 116 from getting stuck between the first permanent magnet 115a and the second permanent magnet 115b.
[0054] The magnetic system 10 further includes a skeleton 118. The first static iron core 113a, the second static iron core 113b, the moving iron core 116, the first permanent magnet 115a, and the second permanent magnet 115b are all arranged inside the skeleton 118. First coils 112a and second coils 112b are respectively sleeved outside the skeleton 118 at positions corresponding to the first static iron core 113a and the second static iron core 113b.
[0055] Exemplarily, as Figure 3 shown, the skeleton 118 of the present application forms a "king" - shaped structure. The middle part of the "king" - shaped structure forms a rectangular body 118a with a hollow interior. The first permanent magnet 115a and the second permanent magnet 115b are relatively located inside the rectangular body 118a. The upper and lower ends of the "king" - shaped structure respectively form support plates. Sleeve tubes 118b are respectively formed between the upper end and the middle part, and between the lower end and the middle part of the skeleton 118. The first static iron core 113a and the second static iron core 113b are respectively located inside the upper and lower sleeve tubes 118b. A part of the moving iron core 116 is located inside the middle rectangular body 118a and a part is located inside the lower sleeve tube 118b.
[0056] The skeleton 118 plays a supporting role. The first coils 112a and the second coils 112b are respectively sleeved outside the upper and lower sleeve tubes 118b to correspond to the first static iron core 113a and the second static iron core 113b respectively.
[0057] In addition, a magnetic yoke is further arranged outside the skeleton 118. The magnetic yoke includes a U - shaped second magnetic yoke 111b and a first magnetic yoke 111a that closes the opening of the U - shape. The first magnetic yoke 111a and the second magnetic yoke 111b are arranged along the moving direction of the moving iron core 116.
[0058] Exemplarily, the second magnetic yoke 111b is located below and forms a U - shaped structure. The first magnetic yoke 111a is a plate - shaped structure, located above, and closes the opening of the U - shape to form a closed structure to wrap the skeleton 118 inside.
[0059] Furthermore, referring to Figure 2 shown, a magnetic shielding cover is further arranged outside the magnetic yoke. The magnetic shielding cover includes a first shielding cover 121 and a second shielding cover 122 that are relatively sleeved to enclose the magnetic yoke. The first shielding cover 121 and the second shielding cover 122 are respectively arranged along the relative direction of the first permanent magnet 115a and the second permanent magnet 115b.
[0060] For example, the first shielding cover 121 and the second shielding cover 122 are both U-shaped structures, and the first shielding cover 121 and the second shielding cover 122 are relatively sleeved to form a closed structure to enclose the magnetic yoke inside.
[0061] The relative direction of the first shielding cover 121 and the second shielding cover 122 is the same as the relative direction of the first permanent magnet 115a and the second permanent magnet 115b.
[0062] The closed structure formed by the magnetic shielding cover effectively surrounds the magnetic yoke and its internal frame 118, coil, moving iron core 116, static iron core, etc., and has a good sealing effect, which can prevent the magnetic system from being disturbed by the external magnetic field and thus affecting its stability.
[0063] On this basis, please refer to Figure 7 The embodiment of the present application also discloses a load switch, including a contact system 20 and a magnetic system 10 as any one of the above items located on one side of the contact system 20, the magnetic system 10 includes a first magnetic yoke 111a, a second magnetic yoke 111b, a first static iron core 113a and a second static iron core 113b located between the first magnetic yoke 111a and the second magnetic yoke 111b, a moving iron core 116 located between the first static iron core 113a and the second static iron core 113b, and a push rod 110 linked to the moving iron core 116, the push rod 110 is driven by the moving iron core 116 to push the contact system 20 to drive the contact system 20 to open and close.
[0064] The load switch is provided with components such as a magnetic system 10 and a contact system 20, and the contact system 20 is driven by the magnetic system 10 to complete the opening and closing of the switch; specifically, the coil in the magnetic system 10 is energized, and the magnetic field generated by the permanent magnet drives the moving iron core 116 to move toward the second static iron core 113b to fit the moving iron core 116, and the moving iron core 116 drives the push rod 110 to move when it moves, and when the push rod 110 pushes the contact system 20, the contact system 20 is closed; when the coil is de-energized and the moving iron core 116 moves in the opposite direction toward the first static iron core 113a, it drives the push rod 110 to leave the contact system 20, and the contact system 20 is opened under the action of the contact spring.
[0065] The load switch comprises the same structure and beneficial effects as the magnetic system 10 in the above-mentioned embodiment. The structure and beneficial effects of the magnetic system 10 have been described in detail in the above-mentioned embodiment, and will not be repeated here.
[0066] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A magnetic system, characterized in that: It comprises a moving iron core and a first stationary iron core and a second stationary iron core respectively located at two ends of the moving iron core. The outer periphery of the moving iron core is also provided with a first permanent magnet and a second permanent magnet opposite to each other. At least one end of the moving iron core is provided with an elastic member.
2. The magnetic system according to claim 1, characterized in that A contact system is also provided on one side of the magnetic system, and the elastic member is located at an end of the moving iron core away from the contact system.
3. The magnetic system according to claim 1, characterized in that The ends of the first permanent magnet and the second permanent magnet with the same polarity are arranged opposite to each other, so that the magnetic circuit formed by the first permanent magnet and the magnetic circuit formed by the second permanent magnet are arranged in parallel.
4. The magnetic system according to claim 1, characterized in that In the moving direction of the moving iron core, at least one of the two ends of the moving iron core, the two ends of the first stationary iron core, and the two ends of the second stationary iron core is provided with a groove.
5. The magnetic system according to claim 4, characterized in that A contact system is also provided on one side of the magnetic system. The second static iron core is close to the contact system. The first static iron core and the second static iron core respectively form a first groove at one end facing the moving iron core, and the moving iron core forms a second groove at one end facing the first static iron core.
6. The magnetic system according to claim 5, characterized in that The magnetic system further comprises a push rod, the push rod is passed through the first static iron core, the second static iron core and the moving iron core, and the elastic member is sleeved on the push rod.
7. The magnetic system according to claim 6, characterized in that The end of the push rod close to the first static iron core is also sleeved with a guide cylinder.
8. The magnetic system according to any one of claims 1 to 7, characterized in that The magnetic system further includes a frame, wherein the first static iron core, the second static iron core, the moving iron core, the first permanent magnet and the second permanent magnet are all arranged inside the frame, and a first coil and a second coil are respectively sleeved outside the frame at positions corresponding to the first static iron core and the second static iron core; A yoke is also provided outside the skeleton, and the yoke includes a first yoke and a second yoke, the second yoke is U-shaped, the first yoke is closed in the U-shaped opening, and the first yoke and the second yoke are arranged along the moving direction of the moving iron core.
9. The magnetic system according to claim 8, characterized in that A magnetic shielding cover is also arranged outside the magnetic yoke, and the magnetic shielding cover includes a first shielding cover and a second shielding cover which are relatively sleeved to close the magnetic yoke, and the first shielding cover and the second shielding cover are respectively arranged along the relative directions of the first permanent magnet and the second permanent magnet.
10. A load switch, characterized in that: The invention comprises a contact system and a magnetic system as claimed in any one of claims 1 to 9 located on one side of the contact system, wherein the magnetic system comprises a first yoke, a second yoke, a first static iron core and a second static iron core located between the first yoke and the second yoke, a moving iron core located between the first static iron core and the second static iron core, and a push rod linked to the moving iron core, wherein the moving iron core drives the push rod to push the contact system to drive the contact system to open and close.