Relay

Abstract

The invention relates to the technical field of electronic control devices, in particular to a relay which comprises a contact structure, an insulating cover and a protective structure, the contact structure comprises a plurality of static contacts and a movable contact piece, one end of each static contact and the movable contact piece are contained in the insulating cover, and the two ends of the movable contact piece can be in contact with or disconnected from the static contacts; the protection structure is located outside the insulation cover, at least part of the protection structure is arranged on the circumferential side wall of the insulation cover, at least part of the protection structure can generate elastic deformation and abut against the circumferential side wall of the insulation cover so as to apply pre-pressure towards an inner cavity of the insulation cover to the insulation cover, and the pre-pressure can counteract part of outward impact force. Meanwhile, the insulation cover is limited to be opened outwards, the insulation cover is effectively protected, particularly the weak circumferential side wall of the insulation cover can be protected, the structural strength of the insulation cover is enhanced, and the safety performance is improved.

Description

Technical Field

[0001] This invention relates to the field of electronic control device technology, and more specifically, to a relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] In related technologies, for high-voltage DC relays, the contact system needs to be encapsulated with an insulating cover. To ensure the reliability of the contact resistance, a large number of products use ceramic insulating covers for the contact system, which are also filled with hydrogen or nitrogen at a certain pressure to assist in arc extinguishing. When the contact system experiences a violent arcing during a short circuit, the gas pressure inside the insulating cover will rise rapidly and instantaneously. If the structural strength of the insulating cover is insufficient, it will affect the safety performance of the relay. Summary of the Invention

[0004] This invention provides a relay to improve its safety performance.

[0005] The relay provided in this embodiment of the invention includes a contact structure, an insulating cover, and a protective structure. The contact structure includes multiple stationary contacts and a moving contact piece. One end of each of the multiple stationary contacts and the moving contact piece are accommodated in the insulating cover. Both ends of the moving contact piece can contact or disconnect from the stationary contacts.

[0006] The protective structure is located outside the insulating cover, and at least a portion of the protective structure is disposed on the circumferential sidewall of the insulating cover. At least a portion of the protective structure is capable of elastic deformation and abuts against the circumferential sidewall of the insulating cover to apply a pre-pressure toward the inner cavity of the insulating cover.

[0007] According to some embodiments of the present invention, the protective structure includes an elastic frame structure, the elastic frame structure being disposed around the circumferential sidewall of the insulating cover; the insulating cover has a height direction, and the elastic frame structure extends from one end of the insulating cover to the other end along the height direction of the insulating cover; or, the elastic frame structure includes a plurality of sub-frames, the plurality of sub-frames being spaced apart along the height direction of the insulating cover.

[0008] According to some embodiments of the present invention, the elastic frame structure has at least one side group, the at least one side group including two opposing side portions, the two side portions being located on opposite sides of the insulating cover to apply a pre-pressure toward the inner cavity of the insulating cover.

[0009] According to some embodiments of the present invention, the number of side groups is two, namely a first side group and a second side group. The first side group includes two opposing first side portions, and the second side group includes two opposing second side portions. Both the two first side portions and the two second side portions are capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover.

[0010] According to some embodiments of the present invention, there are two side groups, namely a first side group and a third side group. The first side group includes two opposing first side portions, and the third side group includes two opposing third side portions. Both first side portions are capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover. The two third side portions are in contact with the insulating cover.

[0011] According to some embodiments of the present invention, the relay further includes a permanent magnet located between the third side portion and the circumferential sidewall of the insulating cover, the third side portion being in contact with the circumferential sidewall of the insulating cover via the permanent magnet.

[0012] According to some embodiments of the present invention, the third side portion is provided with a positioning protrusion, which is used to position the permanent magnet.

[0013] According to some embodiments of the present invention, a reinforcing rib is provided between the first side portion and the third side portion.

[0014] According to some embodiments of the present invention, the elastic frame structure is made of metal.

[0015] According to some embodiments of the present invention, the elastic frame structure is an integrally molded structure, or the elastic frame structure includes a bendable plate-like structure having two ends, the two ends being fixedly connected together to form the elastic frame structure.

[0016] According to some embodiments of the present invention, there are multiple protective structures, which are sequentially arranged on the circumferential sidewalls of the insulating cover.

[0017] According to some embodiments of the present invention, the relay further includes a housing, and the insulating cover and the protective structure are both installed inside the housing.

[0018] According to some embodiments of the present invention, the relay further includes a yoke plate and a frame plate; the insulating cover is made of ceramic, and the yoke plate is connected to the insulating cover through the frame plate; the protective structure is located on the yoke plate, or the protective structure is located on the frame plate.

[0019] Through long-term observation, experimentation, and research, the inventors discovered that the main reason for the insufficient strength of the insulating cover structure in existing relays is that, within a limited product space, and with the dimensions, materials, and molding processes of the insulating cover fixed, especially for ceramic insulating covers, its strength can only be increased to a certain extent. As users' requirements for short-circuit current continue to increase, the cavity of the insulating cover cannot meet these requirements.

[0020] Based on this, one embodiment of the above invention has at least the following advantages or beneficial effects:

[0021] (1) In the relay provided in the embodiments of the present invention, one end of a plurality of stationary contacts and the moving contact are all housed in an insulating cover. Since the protective structure is located outside the insulating cover, and at least part of the protective structure can undergo elastic deformation and abut against the circumferential sidewall of the insulating cover, a pre-pressure can be applied to the insulating cover toward the inner cavity of the insulating cover. This pre-pressure can offset part of the outward impact force, which is beneficial to improving safety performance. At the same time, it restricts the insulating cover from opening outward, effectively protecting the insulating cover, especially the relatively weak circumferential sidewall of the insulating cover, enhancing the structural strength of the insulating cover, and improving safety performance.

[0022] (2) The relay provided in the embodiments of the present invention includes an elastic frame structure in the protective structure. The elastic frame structure is arranged around the circumferential sidewall of the insulating cover. The elastic frame structure can be an integrally molded structure with a circumferentially closed protective space. The insulating cover is located in the protective space. When the huge pressure borne by the insulating cover is transmitted to the protective structure, the integral elastic frame structure can apply a more uniform and stable pre-pressure to the inner cavity of the insulating cover from all sides, effectively protecting the insulating cover and improving safety performance.

[0023] (3) The relay provided in this embodiment of the invention has an elastic frame structure comprising multiple sub-frames, which are spaced apart along the height direction of the insulating cover. This reduces the amount of material used in the elastic frame structure, thereby reducing the overall weight of the relay and lowering production costs. Attached Figure Description

[0024] Figure 1 The diagram shown is an exploded view of the relay provided in an embodiment of the present invention;

[0025] Figure 2 The diagram shown is a schematic diagram of the elastic frame structure in an embodiment of the present invention;

[0026] Figure 3 The diagram shown is a schematic diagram of another structure of the relay provided in an embodiment of the present invention;

[0027] Figure 4 What is shown is Figure 3 The front view of the relay is shown.

[0028] Figure 5 What is shown is Figure 4 A sectional view along line AA;

[0029] Figure 6 The diagram shown is a third structural schematic of the relay provided in an embodiment of the present invention;

[0030] Figure 7 The diagram shown is another schematic diagram of the elastic frame structure in an embodiment of the present invention;

[0031] Figure 8 What is shown is Figure 7 The diagram shows the structure of the elastic frame combined with the permanent magnet.

[0032] Figure 9 The diagram shown is a cross-sectional view of a relay provided in an embodiment of the present invention (protective structure not shown);

[0033] Figure 10 The diagram shown is another structural schematic of the protective structure in an embodiment of the present invention.

[0034] The annotations in the attached figures are explained as follows:

[0035] 10-Insulating cover; 11-First sidewall; 12-Second sidewall; 13-Top plate; 20-Stationary contact; 31-First sub-shell; 32-Second sub-shell; 40-Yoke plate; 50-Frame piece; 60-Coil frame; 70-Moving contact piece; 100-Elastic frame structure; 101-First side part; 102-Second side part; 103-Sub-frame; 104-Third side part; 105-Reinforcing rib; 110-Top protective part; 210-Permanent magnet; 211-Positioning protrusion. Detailed Implementation

[0036] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0037] See Figures 1 to 10As shown, this embodiment provides a relay, including a contact structure, an insulating cover 10, and a protective structure. The contact structure includes a plurality of stationary contacts 20 and a moving contact piece 70. One end of the plurality of stationary contacts 20 and the moving contact piece 70 are both accommodated in the insulating cover 10. Both ends of the moving contact piece can contact or disconnect from the stationary contacts. The protective structure is located outside the insulating cover. At least a portion of the protective structure is disposed on the circumferential sidewall of the insulating cover 10. At least a portion of the protective structure can undergo elastic deformation and abut against the circumferential sidewall of the insulating cover 10 to apply a pre-pressure toward the inner cavity of the insulating cover 10.

[0038] The relay provided in this embodiment can apply a pre-pressure towards the inner cavity of the insulating cover by at least a portion of the protective structure being able to undergo elastic deformation and abut against the circumferential sidewall of the insulating cover. This pre-pressure can offset a portion of the outward impact force, which is beneficial to improving safety performance. At the same time, it restricts the insulating cover from expanding outward, effectively protecting the insulating cover, especially the relatively weak circumferential sidewall of the insulating cover, enhancing the structural strength of the insulating cover, and improving safety performance.

[0039] It should be understood that, in order to apply a pre-pressure toward the inner cavity of the insulating cover 10, the protective structure in this embodiment is located outside the insulating cover.

[0040] For example, the insulating cover 10 in this embodiment is made of ceramic. Of course, the material of the insulating cover is not limited to ceramic; for example, it can also be plastic. The cross-sectional shape of the insulating cover 10 is generally rectangular; for example, the cross-sectional shape of the insulating cover 10 can be a rounded rectangle. The insulating cover 10 has a length direction (with...) Figure 3 The arrow direction (D1) indicates the width direction (indicated by...). Figure 3 The arrow direction (D2 indicates) and the height direction (indicated by) Figure 3 (Indicated by arrow D3 in the image), the insulating cover 10 includes a top plate 13 and circumferential sidewalls arranged around the edge of the top plate 13. The circumferential sidewalls include two first sidewalls 11 and two second sidewalls 12. The two first sidewalls 11 are arranged opposite each other along the width direction of the insulating cover 10, and the two second sidewalls 12 are arranged opposite each other along the length direction of the insulating cover 10.

[0041] For example, there are two stationary contacts 20. The top plate 13 of the insulating cover 10 is provided with two mounting holes, which are spaced apart along the length of the insulating cover 10. Each mounting hole is equipped with one stationary contact 20, one of which serves as the terminal for current inflow and the other as the terminal for current outflow. One end of the moving contact 70 is in contact with or disconnected from one of the stationary contacts 20, and the other end of the moving contact 70 is in contact with or disconnected from the other stationary contact 20. Of course, there can also be more than two stationary contacts, with some of the stationary contacts in contact with or disconnected from one end of the moving contact, and other stationary contacts in contact with or disconnected from the other end of the moving contact.

[0042] It should be understood that, in Figure 1 From one perspective, the top plate 13 of the insulating cover 10 is located above the circumferential sidewall; from other perspectives, the top plate may also be located below or to one side of the circumferential sidewall.

[0043] In this embodiment, Figure 9 An example is shown: the movable contact 70. Figure 9 The moving contact 70 is in the open state with the stationary contact.

[0044] In one embodiment, see Figure 1 As shown, the relay also includes a yoke plate 40 and a frame plate 50, with the yoke plate 40 connected to the end of the insulating cover 10 away from the top plate 13 via the frame plate 50. The relay also includes a coil holder 60, located on the side of the yoke plate 40 away from the protective structure, with a coil wound on the coil holder 60.

[0045] For example, the yoke plate 40 is connected to the end of the insulating cover 10 away from the top plate 13 via the frame piece 50 to form a first inner cavity; a metal shell is connected to the side of the yoke plate 40 away from the insulating cover 10 to form a second inner cavity; the yoke plate 40 is provided with a through hole for connecting the first inner cavity and the second inner cavity; the relay also includes a stationary iron core, a moving iron core and a push rod, the stationary iron core is fixedly disposed in the second inner cavity; the moving iron core is located in the second inner cavity, the moving contact is located in the first inner cavity, the push rod passes through the through hole, one end of the push rod is connected to the moving iron core, and the other end of the push rod is connected to the moving contact; the moving iron core can be attracted or separated from the stationary iron core so that the moving contact on the moving contact can contact or disconnect with the stationary contact on the stationary contact.

[0046] In one embodiment, the protective structure includes an elastic frame structure 100, which surrounds the circumferential sidewall of the insulating cover 10.

[0047] It should be noted that, see Figure 10 As shown, the protective structure may also include a top protective part 110, which is disposed on the top plate of the insulating cover. The top protective part 110 may be integrally formed with the elastic frame structure 100.

[0048] During the assembly of the relay, the elastic frame structure 100 undergoes elastic deformation and comes into contact with a portion of the circumferential sidewall of the insulating cover 10, thereby applying a pre-pressure toward the inner cavity of the insulating cover 10. This pre-pressure can offset part of the outward impact force, which is beneficial to improving safety performance, while limiting the insulating cover 10 from expanding outward.

[0049] In one embodiment, the resilient frame structure has at least one side group, which includes two opposing side portions located on opposite sides of the insulating cover to apply a pre-pressure toward the inner cavity of the insulating cover.

[0050] In some embodiments, there are two side groups, namely a first side group and a second side group. The first side group includes two opposing first side portions 101, and the second side group includes two opposing second side portions 102. Both the two first side portions 101 and the two second side portions 102 are capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover.

[0051] For example, see Figure 1 As shown, two first side portions 101 are respectively disposed on the outside of the first side wall 11 to apply a pre-pressure to the first side wall 11 toward the inner cavity of the insulating cover 10. Two second side portions 102 are respectively disposed on the outside of the second side wall 12 to apply a pre-pressure to the second side wall 12 toward the inner cavity of the insulating cover 10.

[0052] In some embodiments, see Figure 2 As shown, along the height direction of the insulating cover 10, the elastic frame structure 100 extends from one end of the insulating cover 10 to the other. This increases the contact area between the elastic frame structure 100 and the circumferential sidewall of the insulating cover 10, thereby more effectively protecting the insulating cover 10 and further improving safety performance. It should be understood that the contact between the elastic frame structure 100 and the circumferential sidewall of the insulating cover 10 is indirect.

[0053] In this embodiment, the height direction of the elastic frame structure 100 is consistent with the height direction of the insulating cover 10, and the height of the elastic frame structure 100 is not greater than the height of the insulating cover 10, thus not increasing the dimension of the relay in the height direction. For example, the height of the elastic frame structure 100 is substantially equal to the height of the insulating cover 10.

[0054] For example, see Figure 5 As shown, the middle position of the first side portion 101 undergoes elastic deformation towards the inner cavity of the insulating cover, so that the middle position of the first side portion 101 abuts against the first side wall 11 of the insulating cover 10, and a gap is provided between the two ends of the first side portion 101 and the first side wall 11.

[0055] Correspondingly, the middle position of the second side portion 102 undergoes elastic deformation towards the inner cavity of the insulating cover 10, causing the middle position of the second side portion 102 to abut against the second sidewall 12 of the insulating cover 10. Along the length of the insulating cover 10, gaps are provided between the two ends of the second side portion 102 and the second sidewall 12. Figure 5 The arrow in the diagram indicates the direction of the preload.

[0056] For example, see Figure 1 As shown, the elastic frame structure 100 can be an integrally molded structure with a circumferentially closed protective space. The insulating cover 10 is located in the protective space. When the huge pressure borne by the insulating cover 10 is transmitted to the protective structure, the integral elastic frame structure 100 can apply a more uniform and stable pre-pressure to the inner cavity of the insulating cover 10 from all sides, effectively protecting the insulating cover 10 and improving safety performance.

[0057] Of course, see Figure 2 As shown, the elastic frame structure 100 can also be formed by bending a bendable plate structure. Specifically, the two ends of the plate structure can be bent to form folded edges, and the folded edges at both ends can be hooked together to form a folded edge. The folded edges can also be welded to further increase the structural strength.

[0058] In other embodiments, see Figure 3 and Figure 6 As shown, the flexible frame structure 100 includes multiple sub-frames 103, which are spaced apart along the height direction of the insulating cover 10. This reduces the amount of material used in the flexible frame structure 100, thereby reducing the overall weight of the relay and lowering production costs. Furthermore, the sub-frames are smaller, easier to mold, and allow for more precise dimensional control.

[0059] For example, see Figure 3 As shown, the sub-frame 103 can be made of metal strips, see [reference]. Figure 6 As shown, the sub-frame 103 can also be made of elastic metal wire. The sub-frame 103 can be a one-piece molded structure or a frame structure formed by fixed connections at both ends. For example, see... Figures 3 to 5 As shown, both ends of the metal strip are bent to form a folded edge, and the folded edges at both ends are hooked together to form the sub-frame 103. See also... Figure 6 As shown, both ends of the elastic metal wire are bent to form a hook-like structure, and the hook-like parts at both ends are hooked together to form a sub-frame 103.

[0060] The spacing between the multiple sub-frames 103 can be selected according to actual production and processing needs. The multiple sub-frames 103 can all be made of elastic metal wire, or they can all be made of metal strips, or some of the sub-frames 103 can be made of elastic metal wire and others of the sub-frames 103 can be made of metal strips.

[0061] In this embodiment, the elastic frame structure is made of metal.

[0062] In other embodiments, the elastic frame structure may also be made of non-metallic materials, such as plastics capable of elastic deformation.

[0063] It should be noted that the number of elastic frame structures 100 can be one or more, and multiple elastic frame structures 100 are nested in sequence. That is to say, multiple elastic frame structures 100 are arranged in the direction of outward from the inner cavity of the insulating cover 10.

[0064] In some embodiments, see Figure 7 As shown, there are two side groups, namely a first side group and a third side group. The first side group includes two opposing first side portions 101, and the third side group includes two opposing third side portions 104. Both first side portions 101 are capable of elastic deformation to apply a pre-pressure towards the inner cavity of the insulating cover. The two third side portions 104 are in contact with the insulating cover. The third side portions 104 can be rigid structures.

[0065] Two first side portions 101 are respectively disposed on the outside of the first side wall 11 to apply a pre-pressure toward the inner cavity of the insulating cover 10 to the first side wall 11; at the same time, two third side portions 104 are respectively disposed on the outside of the second side wall 12 to enhance the structural strength of the second side wall 12, thereby enhancing the overall safety performance.

[0066] For example, the third side portion 104 is integrally formed with the first side portion 101. See also Figure 8 As shown, a corner is formed between the first side portion 101 and the third side portion 104, and a reinforcing rib 105 is provided at the corner to increase the strength of the elastic frame structure 100. For example, the reinforcing rib 105 is formed by inward stamping to increase the structural strength at the corner.

[0067] The material of the third side portion 104 is a magnetically conductive material. See also... Figure 8 As shown, the relay also includes a permanent magnet 210, which is located between the third side portion 104 and the circumferential sidewall of the insulating cover 10. The two third side portions 104 are in contact with the second sidewall of the insulating cover through the permanent magnet 210.

[0068] For example, there are two permanent magnets 210. The two permanent magnets 310 are arranged opposite each other on both sides of the insulating cover 10 along the length direction of the insulating cover 10 to form an arc-extinguishing magnetic field to achieve the arc-extinguishing function. The two permanent magnets 210 are respectively located between the third side portion 104 and the second side wall 12 of the insulating cover 10.

[0069] In one embodiment, both third side portions 104 are provided with positioning protrusions 211, which are used to position the permanent magnet 210.

[0070] The positioning protrusion 211 can be formed by stamping the elastic frame structure.

[0071] In one embodiment, the relay further includes a housing, with an insulating cover and a protective structure all installed inside the housing. In this case, the housing provides additional protection.

[0072] For example, see Figure 1 As shown, the housing includes a first sub-shell 31 and a second sub-shell 32, which are fixedly connected to encapsulate the insulating cover 10 and the protective structure within the housing.

[0073] Finally, it should be noted that the various embodiments / implementations provided by this invention can be combined with each other without creating contradictions, and will not be described in detail here.

[0074] In the embodiments of the invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installed," "connected," "linked," "fixed," and "contact" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "linked" can be a direct connection or an indirect connection through an intermediate medium; and "contact" can be direct contact or indirect contact. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the invention according to the specific circumstances.

[0075] In the description of the embodiments of the invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the invention.

[0076] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] The above are merely preferred embodiments of the invention and are not intended to limit the scope of the invention. Those skilled in the art will recognize that various modifications and variations can be made to the invention. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A relay characterized by comprising: The contact structure includes a plurality of static contacts and a dynamic contact, one end of the plurality of static contacts and the dynamic contact are accommodated in the insulating cover, and two ends of the dynamic contact can be in contact with or disconnected from the static contacts. The protective structure is located outside the insulating cover, at least part of the protective structure is arranged on the circumferential side wall of the insulating cover, and at least part of the protective structure can be elastically deformed and abut against the circumferential side wall of the insulating cover to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover.

2. The relay according to claim 1, characterized in that The protective structure includes an elastic frame structure, the elastic frame structure is arranged around the circumferential side wall of the insulating cover; the insulating cover has a height direction, along the height direction of the insulating cover, the elastic frame structure extends from one end of the insulating cover to the other end; or the elastic frame structure includes a plurality of sub-frames, and the plurality of sub-frames are arranged at intervals along the height direction of the insulating cover.

3. The relay according to claim 2, characterized in that The elastic frame structure has at least one side group, at least one side group includes two opposite side parts, and the two side parts are located on both sides of the insulating cover to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover.

4. The relay according to claim 3, characterized in that The number of side groups is two, the two side groups are a first side group and a second side group respectively, the first side group includes two opposite first side parts, the second side group includes two opposite second side parts, and the two first side parts and the two second side parts can be elastically deformed to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover.

5. The relay of claim 3, wherein The number of side groups is two, the two side groups are a first side group and a third side group respectively, the first side group includes two opposite first side parts, the third side group includes two opposite third side parts, and the two first side parts can be elastically deformed to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover; the two third side parts are in contact with the insulating cover.

6. The relay of claim 5, wherein A permanent magnet is further included, the permanent magnet is located between the third side part and the circumferential side wall of the insulating cover, and the third side part is in contact with the circumferential side wall of the insulating cover through the permanent magnet.

7. The relay according to claim 6, characterized in that The third side part is provided with a positioning protrusion for positioning the permanent magnet.

8. The relay of claim 5, wherein, A reinforcing rib is arranged between the first side part and the third side part.

9. The relay according to any one of claims 2 to 8, characterized in that The material of the elastic frame structure is metal.

10. The relay according to any one of claims 2 to 8, characterized in that The elastic frame structure is an integral molding structure, or the elastic frame structure includes a bendable plate structure, the bendable plate structure has two end parts, and the two end parts are fixedly connected together to form the elastic frame structure.

11. The relay according to any one of claims 1 to 8, characterized in that The number of protective structures is multiple, and the multiple protective structures are arranged in sequence on the circumferential side wall of the insulating cover.

12. The relay according to any one of claims 1 to 8, characterized in that A shell is further included, and the insulating cover and the protective structure are mounted inside the shell.

13. The relay according to any one of claims 1 to 8, characterized in that The yoke plate and the frame are further included; the material of the insulating cover is ceramic; the yoke plate is connected to the insulating cover through the frame; the protective structure is located on the yoke plate, or the protective structure is located on the frame.

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