Contact mechanism for load switch or relay, load switch and relay

Abstract

The utility model provides a contact mechanism for a load switch or a relay, the load switch and the relay, and relates to the low-voltage electrical field. The utility model provides a contact mechanism for a load switch or a relay. The contact mechanism comprises a first magnetism increasing block, a moving contact group and a static contact group which can be in contact with or separated from the moving contact group, the moving contact group comprises a moving contact, a moving contact leading-out bus and a connecting part, and the moving contact leading-out bus, the connecting part and the moving contact are sequentially connected to form a U-shaped structure; the moving contact comprises a moving contact rod and a moving contact, the moving contact rod is connected with the connecting part, and the moving contact is arranged on the side, away from the moving contact leading-out bus, of the moving contact rod; the first magnetism increasing block is arranged on one side, provided with the movable contact, of the movable contact rod. According to the contact mechanism for the load switch or the relay, the U-shaped loop is arranged, and the first magnetism increasing block is arranged at the joint of the moving contact and the static contact, so that the electro-dynamic repulsive force during short-time resistance is further reduced, and the short-time resistance is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical equipment, and in particular to a contact mechanism for a load switch or a relay, a load switch and a relay. Background Art

[0002] Load switches are the main components of today's smart meters. Load switches are control components that use the interaction and relative movement of electromagnetic coils and permanent magnets to close and disconnect the contact mechanism under the action of a drive control signal, and remain connected or disconnected after the drive control signal disappears.

[0003] Existing electric meters are becoming more and more integrated, and integrating load switches into electric meters has become a development trend of electric meters. When the short-term withstand index in the load switch is high, it is easy to cause the repulsion between the moving contact and the static contact to be large and repel each other, resulting in poor closing stability of the load switch. Although the existing load switch reduces the contact repulsion by setting a compensation circuit, its effect is limited. When the short-term withstand index is high, the moving contact and the static contact will still repel each other. Therefore, how to ensure that the contact mechanism can still close stably when the short-term withstand index is high is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The utility model aims to provide a contact mechanism for a load switch or a relay, which can enable the contact mechanism to stably close when the short-term withstand index is high, reduce the electric repulsion of the contact mechanism during short-term withstand, and enhance the short-term withstand performance.

[0005] The embodiment of the utility model is achieved as follows:

[0006] One aspect of the utility model provides a contact mechanism for a load switch or a relay, comprising a first magnetizing block, a moving contact group and a static contact group capable of contacting or separating with the moving contact group; the moving contact group comprises a moving contact, a moving contact lead-out busbar and a connecting portion, the moving contact lead-out busbar, the connecting portion and the moving contact are sequentially connected to form a U-shaped structure; the moving contact comprises a moving contact rod and a moving contact point, the moving contact rod is connected to the connecting portion, and the moving contact point is arranged on a side of the moving contact rod away from the moving contact lead-out busbar; the first magnetizing block is arranged on a side of the moving contact rod where the moving contact point is arranged.

[0007] Optionally, the stationary contact group includes a stationary contact capable of contacting or separating with the moving contact; a rotating shaft is provided at one end of the moving contact rod away from the moving contact; when the moving contact contacts the stationary contact, the first magnetizing block is located between the moving contact and the rotating shaft.

[0008] Optionally, the spacing distance between the moving contact and the stationary contact is greater than the overtravel of the moving contact.

[0009] Optionally, the contact mechanism for the load switch or relay includes a second magnetization block, and a plurality of second magnetization blocks are respectively arranged on opposite sides of the moving contact rod of the moving contact.

[0010] Optionally, when there are two moving contacts, the two moving contacts are arranged side by side; the contact mechanism includes a second magnetizing block, and a plurality of second magnetizing blocks are respectively arranged on the sides of the moving contact rods of the two moving contacts that are away from each other.

[0011] Optionally, the second magnetizing block is fixed on the moving contact rod, and when the moving contact contacts the stationary contact, the position of the second magnetizing block corresponds to that of the first magnetizing block.

[0012] Optionally, when there are two moving contacts, the two moving contacts are arranged side by side; the first magnetizing block includes two first sub-magnetizing blocks, and the two first sub-magnetizing blocks are respectively arranged on one side of the moving contact rods of the two moving contacts where the moving contacts are provided.

[0013] Optionally, the first magnetization block is composed of a plurality of magnetization sheets.

[0014] Another aspect of the utility model provides a load switch, comprising the above-mentioned contact mechanism for a load switch or a relay.

[0015] Another aspect of the utility model provides a relay, comprising the above-mentioned contact mechanism for a load switch or a relay.

[0016] The beneficial effects of the utility model include at least one of the following:

[0017] The present application provides a contact mechanism for a load switch or relay, comprising a first magnetizing block, a moving contact group, and a static contact group capable of contacting or separating with the moving contact group; the moving contact group comprises a moving contact, a moving contact lead-out busbar, and a connecting portion, the moving contact lead-out busbar, the connecting portion, and the moving contact are sequentially connected to form a U-shaped structure, so that the direction of the current flowing through the moving contact lead-out busbar is opposite to the direction of the current flowing through the moving contact; the moving contact comprises a moving contact rod and a moving contact, the moving contact rod is connected to the connecting portion, and the moving contact is arranged on the side of the moving contact rod away from the moving contact lead-out busbar; the first magnetizing block is arranged on the side of the moving contact rod where the moving contact is arranged. The contact mechanism for a load switch or relay obtained by the above design, through the setting of a U-shaped loop, and the setting of the first magnetizing block at the connection between the moving and static contacts, further reduces the electric repulsion during short-endurance and enhances the short-endurance performance.

[0018] The present application also provides a load switch, including the contact mechanism for a load switch or a relay. The load switch obtained by the above design, through the U-shaped loop structure of the contact mechanism and the setting of the first magnetizing block, enables the contact mechanism to maintain the stability of closing during short-term durability.

[0019] The present application also provides a relay, including the contact mechanism for load switch or relay. The relay obtained by the above design, through the U-shaped loop structure of the contact mechanism and the setting of the first magnetizing block, enables the contact mechanism to maintain the stability of closing during short-term durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, 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 utility model 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 paying creative work.

[0021] Figure 1 One of the structural schematic diagrams of the contact mechanism provided in the embodiment of the utility model;

[0022] Figure 2 The second structural diagram of the contact mechanism provided by the embodiment of the utility model;

[0023] Figure 3 The third structural diagram of the contact mechanism provided by the embodiment of the utility model;

[0024] Figure 4 The first is a schematic diagram of the structure of the electric meter provided by the embodiment of the utility model;

[0025] Figure 5 The second is a schematic structural diagram of an electric meter provided in an embodiment of the utility model.

[0026] Icons: 100-contact mechanism; 110-first magnetizing block; 120-moving contact group; 121-moving contact; 1211-moving contact rod; 1212-moving contact; 1213-rotating shaft; 122-moving contact lead-out busbar; 123-connecting part; 130-stationary contact group; 131-stationary contact; 140-second magnetizing block; 200-load switch; 210-magnetic system; 220-wiring port; 300-electricity meter. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model 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 invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[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 utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. 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 the present invention, it is also necessary to explain 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 components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Please refer to Figure 1The present embodiment provides a contact mechanism 100 for a load switch or a relay, comprising a first magnetizing block 110, a moving contact group 120 and a stationary contact group 130 capable of contacting or separating with the moving contact group 120; the moving contact group 120 comprises a moving contact 121, a moving contact lead-out busbar 122 and a connecting portion 123, the moving contact lead-out busbar 122, the connecting portion 123 and the moving contact 121 are sequentially connected to form a U-shaped structure; the moving contact 121 comprises a moving contact rod 1211 and a moving contact point 1212, the moving contact rod 1211 is connected to the connecting portion 123, and the moving contact point 1212 is arranged on a side of the moving contact rod 1211 away from the moving contact lead-out busbar 122; the first magnetizing block 110 is arranged on a side of the moving contact rod 1211 where the moving contact point 1212 is arranged.

[0034] Specifically, Figure 1 and Figure 2 As shown, the present application provides a contact mechanism 100 , which includes a moving contact group 120 and a stationary contact group 130 . The moving contact group 120 can contact or move away from the stationary contact group 130 to achieve closing or opening of the contact mechanism 100 .

[0035] Among them, the moving contact group 120 includes a moving contact 121 and a moving contact lead-out busbar 122, and a connecting part 123 is connected between the moving contact 121 and the moving contact lead-out busbar 122. One end of the connecting part 123 is connected to the moving contact lead-out busbar 122, and the other end is connected to the moving contact 121, so that the moving contact lead-out busbar 122, the connecting part 123 and the moving contact 121 are connected in sequence to form a U-shaped structure; so that the direction of the current flowing through the moving contact lead-out busbar 122 is opposite to the direction of the current flowing through the moving contact 121.

[0036] When the contact mechanism 100 is closed, the Lorentz force generated when the current flows through the U-shaped moving contact group 120 can resist the Holm force generated when the current contacts the moving contact 121 and the stationary contact 131, thereby reducing the repulsive force between the moving contact 121 and the stationary contact 131 and improving the short-circuit withstand performance.

[0037] The contact mechanism 100 further includes a first magnetizing block 110, and the moving contact 121 includes a moving contact rod 1211 and a moving contact point 1212. The moving contact rod 1211 is connected to a connecting portion 123, and the moving contact point 1212 is arranged on the side of the moving contact rod 1211 away from the moving contact lead-out busbar 122; the first magnetizing block 110 is arranged on the side of the moving contact rod 1211 where the moving contact point 1212 is arranged. Since the current flowing into the moving contact lead-out busbar 122 and the moving contact 121 generates a circular magnetic field, the first magnetizing block 110 is arranged on the side of the moving contact rod 1211 where the moving contact point 1212 is arranged. When the moving contact 121 contacts the stationary contact 131, part of the circular magnetic field is affected by the magnetizing block, resulting in an unbalanced force on the upper and lower sides of the circular magnetic field, thereby further reducing the repulsive force of the moving contact group 120 and the stationary contact group 130 during short-term resistance.

[0038] It should be noted that, first, Figure 1 and Figure 2 As shown, the static contact group 130 includes a static contact 131 that can contact or separate from the moving contact 121; a rotating shaft 1213 is provided at one end of the moving contact rod 1211 away from the moving contact 1212; when the moving contact 121 contacts the static contact 131, the first magnetizing block 110 is located between the moving contact 1212 and the rotating shaft 1213.

[0039] Specifically, the moving contact 121 includes a moving contact rod 1211, one end of which is provided with a moving contact 1212, and correspondingly, the static contact 131 is provided with a static contact, and the moving contact 1212 contacts with the static contact to achieve stable and good closing. A rotating shaft 1213 is provided at one end of the moving contact rod 1211 away from the moving contact 1212, and the opposite sides of the rotating shaft 1213 are hinged with the housing of the load switch 200, so that the moving contact 121 rotates relative to the static contact 131. When the moving contact 121 contacts with the static contact 131, the moving contact 1212 contacts with the surface of the static contact, and at this time, the first magnetizing block 110 is attached between the moving contact 1212 and the rotating shaft 1213.

[0040] Through such a setting, the first magnetizing block 110 can further reduce the electric repulsion during short-term resistance and enhance the short-term resistance performance, while also not affecting the contact between the moving contact 121 and the static contact 131, further improving the stability and reliability of the contact mechanism 100 when closing.

[0041] Second, the spacing distance between the moving contact 121 and the stationary contact 131 is greater than the overtravel of the moving contact 121 .

[0042] Specifically, a certain spacing distance is set between the moving contact 121 and the static contact 131, and the first magnetizing block 110 is set between the static contact 131 and the moving contact 121. In order to prevent the moving contact 121 from being unable to contact the static contact 131 due to the setting of the first magnetizing block 110 when the moving contact 121 moves toward the static contact 131, a sufficient spacing distance needs to be set between the moving contact 121 and the static contact 131, and the spacing distance between the moving contact 121 and the static contact 131 is greater than the overtravel of the moving contact 121. The overtravel means that when the moving contact 121 and the static contact 131 are fully closed, after the static contact 131 is removed, the moving contact point 1212 of the moving contact 121 can still move downward. By making the spacing distance between the moving contact 121 and the stationary contact 131 greater than the overtravel of the moving contact 121, it can be ensured that the moving contact group 120 and the stationary contact group 130 can still be reliably in contact after the moving contact 1212 is burned, further improving the stability and reliability of the contact mechanism 100 when closing.

[0043] Third, the first magnetizing block 110 is composed of a plurality of magnetizing sheets.

[0044] Specifically, in actual production and processing, if the first magnetizing block 110 is thick, it is not easy to prepare. Therefore, the first magnetizing block 110 can be formed by stamping a plurality of magnetizing thin sheets to facilitate preparation and improve production efficiency. At the same time, the alternating current flowing through the contact mechanism 100 generates an eddy current effect. Setting the first magnetizing block 110 as a plurality of magnetizing thin sheets can reduce the eddy current effect and further improve the stability and reliability of the contact mechanism 100 when closing. Of course, the first magnetizing block 110 can also be an integral structure, and its specific setting method can be flexibly adjusted according to the thickness of the first magnetizing block 110.

[0045] In an implementation manner of the present application, the contact mechanism 100 includes a second magnetizing block 140 , and a plurality of second magnetizing blocks 140 are respectively disposed on two opposite sides of a moving contact rod 1211 of the moving contact 121 .

[0046] Specifically, Figure 3 As shown, the contact mechanism 100 includes a second magnetizing block 140, and a plurality of second magnetizing blocks 140 are provided. The plurality of second magnetizing blocks 140 are respectively arranged on opposite sides of the moving contact rod 1211 of the moving contact 121, and the positions and quantities of the second magnetizing blocks 140 on opposite sides of the moving contact rod 1211 of the moving contact 121 correspond one to one.

[0047] By setting the second magnetizing block 140, it can cooperate with the U-shaped loop and the first magnetizing block 110 to further make the current flowing into the moving contact lead-out busbar 122 and the moving contact 121 generate an unbalanced upper and lower force of the circular magnetic field, thereby further reducing the repulsive force of the moving and static contacts 131 during short-term durability.

[0048] In one possible implementation mode of the present application, when there are two moving contacts 121 , the two moving contacts 121 are arranged side by side; the contact mechanism 100 includes a second magnetizing block 140 , and a plurality of second magnetizing blocks 140 are respectively arranged on the sides of the moving contact rods 1211 of the two moving contacts 121 that are away from each other.

[0049] Specifically, Figure 3 As shown, the moving contact 121 can be set to one or two. When there are two moving contacts 121, the two moving contacts 121 are arranged side by side, and a moving contact point 1212 is respectively arranged at the end of the moving contact rod 1211 of the two moving contacts 121; the contact mechanism 100 includes a second magnetization block 140, and the second magnetization block 140 includes a plurality of second magnetization blocks 140, which are respectively arranged on the side of the moving contact rods 1211 of the two moving contacts 121 that are away from each other, and the position and number of the second magnetization blocks 140 on the side where the moving contact rods 1211 of the two moving contacts 121 are relatively arranged correspond one to one.

[0050] By arranging the second magnetizing block 140 on the side where the moving contact rods 1211 of the two moving contacts 121 face away from each other, it can cooperate with the U-shaped loop and the first magnetizing block 110 to further make the current flowing into the moving contact lead-out busbar 122 and the moving contact 121 generate an unbalanced upper and lower force of the circular magnetic field, thereby further reducing the repulsive force between the moving contact 121 and the static contact 131 during short-term operation.

[0051] Furthermore, the second magnetizing block 140 is fixed on the moving contact rod 1211 , and when the moving contact 121 contacts the stationary contact 131 , the position of the second magnetizing block 140 corresponds to that of the first magnetizing block 110 .

[0052] Specifically, the second magnetization block 140 is fixed on the moving contact rod 1211. Preferably, the second magnetization block 140 can be riveted on the moving contact rod 1211. Of course, it can also be welded to the moving contact rod 1211. When the moving contact 121 contacts the static contact 131, the position of the second magnetization block 140 corresponds to that of the first magnetization block 110. Such a setting does not affect the closing process of the moving contact 121 and the static contact 131, and it is also convenient to cooperate with the first magnetization block 110 to further reduce the repulsive force of the moving and static contacts 131 during short-term resistance.

[0053] Furthermore, when there are two moving contacts 121 , the two moving contacts 121 are arranged side by side; the first magnetizing block 110 includes two first sub-magnetizing blocks, and the two first sub-magnetizing blocks are respectively arranged on one side of the moving contact rod 1211 of the two moving contacts 121 where the moving contact point 1212 is provided.

[0054] Specifically, the moving contact 121 can be set to one or two. When there are two moving contacts 121, the two moving contacts 121 are arranged side by side; the first magnetizing block 110 includes two first sub-magnetizing blocks, and the two first sub-magnetizing blocks are respectively arranged side by side on one side of the moving contact rod 1211 of the two moving contacts 121 where the moving contact 1212 is provided. When the two moving contacts 121 are in contact with the static contact 131, the two moving contacts 1212 are in contact with the surface of the static contact. At this time, the two first sub-magnetizing blocks are respectively attached between the moving contacts 1212 of the two moving contacts 121 and the rotating shaft 1213.

[0055] The provision of the first magnetizing block 110 can further reduce the electric repulsion during short-term withstand voltage, enhance the short-term withstand voltage performance, and at the same time will not affect the contact between the moving contact 121 and the static contact 131, further improving the stability and reliability of the contact mechanism 100 during closing.

[0056] Of course, the first magnetizing block 110 can also be set as an integral structure. It only needs to ensure that it can act on the two moving contacts 121 at the same time to simultaneously reduce the electric repulsion of the two moving contacts 121 during short-term durability and enhance the short-term durability. The present application does not impose any restrictions on the specific setting form of the first magnetizing block 110.

[0057] In another aspect of the embodiment of the present application, a load switch 200 is provided, comprising the above-mentioned contact mechanism 100 for a load switch or a relay.

[0058] Specifically, Figure 4 As shown, the present application also provides a load switch 200, wherein the contact mechanism 100 for the load switch or relay is arranged in the housing of the load switch 200; a magnetic system 210 is also arranged in the housing of the load switch 200, and the magnetic system 210 is connected to the moving contact group 120 of the contact mechanism 100 in a transmission manner to drive the moving contact 121 of the moving contact group 120 to approach or move away from the static contact group 130 of the contact mechanism 100; the other end of the contact mechanism 100 for the load switch or relay is connected to the wiring port 220 to form an electrical circuit. Among them, the specific structure and beneficial effects of the contact mechanism 100 for the load switch or relay have been described in detail above, and will not be repeated here. The load switch 200 obtained by the above design, through the U-shaped loop structure of the contact mechanism 100 for the load switch or relay and the setting of the first magnetizing block 110, enables the contact mechanism 100 for the load switch or relay to still maintain the stability of closing during short-term resistance.

[0059] In another aspect of the embodiment of the present application, a relay is provided, comprising the above-mentioned contact mechanism 100 for a load switch or a relay.

[0060] Specifically, a relay is an electrical control device, and a contact mechanism 100 for a load switch or relay is arranged inside the relay; wherein, the specific structure and beneficial effects of the contact mechanism 100 for a load switch or relay have been described in detail above, and will not be repeated here. The relay obtained by the above design, through the U-shaped loop structure of the contact mechanism 100 for a load switch or relay and the setting of the first magnetizing block 110, enables the contact mechanism 100 for a load switch or relay to still maintain the stability of closing during short-term resistance.

[0061] The above description is only an optional embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0062] In another aspect of the embodiment of the present application, an electric meter 300 is provided, comprising the above-mentioned load switch 200 or relay.

[0063] Specifically, the present application also provides an electric meter 300, such as Figure 5 As shown, the electric meter 300 includes the contact mechanism 100 for the load switch or relay, the contact mechanism 100 for the load switch or relay is arranged in the load switch 200 or the relay, and the load switch 200 or the relay is arranged in the housing of the electric meter 300, wherein the specific structure and beneficial effects of the contact mechanism 100 for the load switch or the relay have been described in detail above and will not be repeated here. The electric meter 300 obtained by the above design can still maintain the stability of the closing switch during short-term resistance.

[0064] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

Claims

1. A contact mechanism for a load switch or a relay, characterized in that: The invention comprises a first magnetizing block (110), a moving contact group (120), and a stationary contact group (130) capable of contacting or separating from the moving contact group (120); the moving contact group (120) comprises a moving contact (121), a moving contact lead-out busbar (122), and a connecting portion (123); the moving contact lead-out busbar (122), the connecting portion (123), and the moving contact (121) are sequentially connected to form a U-shaped structure; The moving contact (121) comprises a moving contact rod (1211) and a moving contact point (1212); the moving contact rod (1211) is connected to the connecting portion (123); the moving contact point (1212) is arranged on a side of the moving contact rod (1211) away from the moving contact lead-out busbar (122); and the first magnetizing block (110) is arranged on a side of the moving contact rod (1211) on which the moving contact point (1212) is arranged.

2. The contact mechanism for a load switch or a relay according to claim 1, characterized in that: The stationary contact group (130) comprises a stationary contact (131) capable of contacting or separating with the moving contact (121); a rotating shaft (1213) is provided at one end of the moving contact rod (1211) away from the moving contact (1212); when the moving contact (121) contacts the stationary contact (131), the first magnetizing block (110) is located between the moving contact (1212) and the rotating shaft (1213).

3. The contact mechanism for a load switch or a relay according to claim 2, characterized in that: The spacing distance between the moving contact (121) and the stationary contact (131) is greater than the overtravel of the moving contact (121).

4. The contact mechanism for a load switch or a relay according to claim 2, characterized in that: The contact mechanism (100) for a load switch or a relay comprises a second magnetizing block (140), and a plurality of the second magnetizing blocks (140) are respectively arranged on opposite sides of a moving contact rod (1211) of the moving contact (121).

5. The contact mechanism for a load switch or a relay according to claim 2, characterized in that: When there are two moving contacts (121), the two moving contacts (121) are arranged side by side; the contact mechanism (100) comprises a second magnetizing block (140), and a plurality of the second magnetizing blocks (140) are respectively arranged on the sides of the moving contact rods (1211) of the two moving contacts (121) that are away from each other.

6. The contact mechanism for a load switch or a relay according to claim 4 or 5, characterized in that: The second magnetizing block (140) is fixed on the moving contact rod (1211); when the moving contact (121) contacts the stationary contact (131), the position of the second magnetizing block (140) corresponds to that of the first magnetizing block (110).

7. The contact mechanism for a load switch or a relay according to claim 1, characterized in that: When there are two moving contacts (121), the two moving contacts (121) are arranged side by side; the first magnetizing block (110) comprises two first sub-magnetizing blocks, and the two first sub-magnetizing blocks are respectively arranged on one side of the moving contact rods (1211) of the two moving contacts (121) where the moving contact points (1212) are provided.

8. The contact mechanism for a load switch or a relay according to claim 1, characterized in that: The first magnetizing block (110) is composed of a plurality of magnetizing sheets.

9. A load switch, characterized in that: A contact mechanism (100) for a load switch or a relay comprising the contact mechanism (100) as claimed in any one of claims 1 to 8.

10. A relay, characterized in that: A contact mechanism (100) for a load switch or a relay comprising the contact mechanism (100) as claimed in any one of claims 1 to 8.

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