Relay

Abstract

The invention relates to the technical field of electronic control devices, in particular to a relay, which comprises an insulating cover, a contact structure and a protective structure, and is characterized in that the contact structure is accommodated in the insulating cover; the protective structure is arranged on the circumferential side wall of the insulating cover, the protective structure is in contact with at least part of the circumferential side wall of the insulating cover, the protective structure comprises an elastic part, and the elastic part can apply pressure towards an inner cavity of the insulating cover to the insulating cover; and / or, the protection structure comprises a rigid part, and the rigid part can apply pressure towards the inner cavity of the insulation cover to the insulation cover, so that a safety protection effect can be achieved under extreme working conditions of short circuit, overload breaking and the like of the contact system, the sealing reliability of the cavity and the structural strength of the insulation cover are improved, and the high short circuit resistance requirement of a user is met.

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 violent arcing during a short circuit, the temperature rises instantly. 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 an insulating cover, a contact structure, and a protective structure. The contact structure is housed within the insulating cover. The protective structure is disposed on the circumferential sidewall of the insulating cover and contacts at least a portion of the circumferential sidewall of the insulating cover. The protective structure includes an elastic portion capable of applying pressure toward the inner cavity of the insulating cover. Alternatively, the protective structure includes a rigid portion capable of applying pressure toward the inner cavity of the insulating cover.

[0006] According to some embodiments of the present invention, the protective structure is a frame that surrounds the circumferential sidewall of the insulating cover;

[0007] The protective structure includes an elastic portion capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover;

[0008] And / or, the protective structure includes a rigid portion that contacts the circumferential sidewall of the insulating cover, such that when the insulating cover applies a force to the rigid portion, the rigid portion is capable of applying pressure toward the inner cavity of the insulating cover.

[0009] According to some embodiments of the present invention, the protective structure is an elastic frame structure, the elastic frame structure includes an elastic portion, the elastic portion includes two opposing first side portions, the two first side portions are respectively located on both sides of the insulating cover, so as to apply a pre-pressure toward the inner cavity of the insulating cover to the insulating cover.

[0010] According to some embodiments of the present invention, 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, the plurality of sub-frames being spaced apart along the height direction of the insulating cover.

[0011] According to some embodiments of the present invention, the elastic part is made of metal.

[0012] According to some embodiments of the present invention, the elastic frame structure further includes a rigid portion, the rigid portion including two opposing third side portions, the third side portions being connected between the two first side portions, and the two third side portions contacting the sidewall of the insulating cover.

[0013] According to some embodiments of the present invention, the elastic frame structure further includes a filling layer located between the rigid portion and the insulating cover.

[0014] According to some embodiments of the present invention, the relay further includes a permanent magnet located between the rigid portion and the circumferential sidewall of the insulating cover, wherein the rigid portion contacts the circumferential sidewall of the insulating cover through the permanent magnet.

[0015] According to some embodiments of the present invention, the rigid part is provided with a positioning protrusion, which is used to position the permanent magnet.

[0016] According to some embodiments of the present invention, the protective structure includes a rigid part and a filling layer, the filling layer being located between the rigid part and the insulating cover.

[0017] According to some embodiments of the present invention, the rigid part is an integrally formed rigid frame structure;

[0018] Alternatively, the rigid part may include a first sub-rigid part and a second sub-rigid part, wherein the first sub-rigid part and the second sub-rigid part are fixedly connected to form a rigid frame structure;

[0019] Alternatively, a limiting part is provided on one side of the rigid part, and a limiting fitting part is provided on the other side of the rigid part. The rigid part can be bent so that the limiting fitting part and the limiting part cooperate to form a rigid frame structure.

[0020] According to some embodiments of the present invention, the relay further includes a permanent magnet located between the rigid frame structure and the circumferential sidewall of the insulating cover.

[0021] According to some embodiments of the present invention, the rigid frame structure is provided with a positioning protrusion, which is used to position the permanent magnet.

[0022] According to some embodiments of the present invention, the filling layer fills the filling space formed between the circumferential sidewall of the insulating cover and the rigid part;

[0023] The filling layer is a colloid; or, the filling layer includes a reinforcing structure and a colloid, wherein the reinforcing structure is disposed between the circumferential sidewall of the insulating cover and the rigid part.

[0024] According to some embodiments of the present invention, the relay further includes a leak-proof structure for sealing the bottom of the filling space.

[0025] According to some embodiments of the present invention, the leak-proof structure includes a sleeve with openings at both ends, the sleeve being fitted over the outside of the insulating cover, one end of the sleeve being connected to the yoke plate of the relay, and the other end of the sleeve being provided with a sealing groove, the rigid part being disposed in the sealing groove, and the bottom of the sealing groove being used to seal the bottom of the filling space.

[0026] According to some embodiments of the present invention, the leak-proof structure is a sealing ring, which is sleeved on the outside of the insulating cover, and the rigid part is disposed on the sealing ring.

[0027] According to some embodiments of the present invention, the leak-proof structure is an inward flange disposed at one end of the rigid part.

[0028] According to some embodiments of the present invention, the insulating cover is provided with an outward flange, the rigid part is provided on the outward flange, and the surface of the outward flange facing the top of the insulating cover forms the leak-proof structure.

[0029] According to some embodiments of the present invention, the protective structure is an elastic portion that wraps around the circumferential sidewall of the insulating cover and fits against the circumferential sidewall of the insulating cover to apply a pre-pressure toward the inner cavity of the insulating cover.

[0030] According to some embodiments of the present invention, the elastic part is one of heat shrink tubing, cable ties, and adhesive tape.

[0031] According to some embodiments of the present invention, the number of protective structures is multiple, and among the multiple protective structures, at least one protective structure is an elastic frame structure and at least one protective structure is a rigid frame structure, and the elastic frame structure and the rigid frame structure are alternately arranged on the circumferential sidewall of the insulating cover.

[0032] 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.

[0033] According to some embodiments of the present invention, the protective structure is located outside the insulating cover to form part of the housing of the relay.

[0034] According to some embodiments of the present invention, the relay further includes a yoke plate and a frame plate, the yoke plate being connected to the insulating cover via the frame plate; the protective structure is located on the yoke plate, or the protective structure is located on the frame plate.

[0035] 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.

[0036] Based on this, one embodiment of the above invention has at least the following advantages or beneficial effects:

[0037] (1) The relay provided in this embodiment of the invention, by providing a protective structure on the circumferential sidewall of the insulating cover, with at least a portion of the protective structure in contact with the circumferential sidewall of the insulating cover, can ensure that the contact system provides safety protection under extreme conditions such as short circuits and overload disconnection, thereby improving the sealing reliability of the cavity and the structural strength of the insulating cover, and meeting the user's high short-circuit resistance requirements. The elastic and / or rigid parts included in the protective structure can apply pressure towards the inner cavity of the insulating cover, thereby limiting the insulating cover from expanding outwards and effectively protecting the insulating cover, especially the relatively weak sidewalls of the insulating cover, thus improving safety performance. Furthermore, placing the protective structure on the circumferential sidewall of the insulating cover helps to fully utilize the limited internal space of the product.

[0038] (2) The relay provided in this embodiment of the invention includes an elastic part in its protective structure. The elastic part is capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover. During the assembly of the relay, the elastic part undergoes elastic deformation and contacts a portion of the circumferential sidewall of the insulating cover, thereby applying a pre-pressure toward the inner cavity of the insulating cover. This pre-pressure can offset a portion of the outward impact force, which is beneficial to improving safety performance, while also limiting the outward expansion of the insulating cover.

[0039] (3) The relay provided in this embodiment of the invention has a protective structure including an elastic part and a rigid part. The elastic part is capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover; the rigid part contacts the circumferential sidewall of the insulating cover. During the assembly of the relay, the elastic part undergoes elastic deformation and contacts a portion of the circumferential sidewall of the insulating cover, thereby applying a pre-pressure toward the inner cavity of the insulating cover. This pre-pressure can offset a portion of the outward impact force, which is beneficial to improving safety performance and limiting the outward expansion of the insulating cover. At the same time, the rigid part contacts the circumferential sidewall of the insulating cover, thereby protecting the insulating cover and improving the structural strength of the insulating cover.

[0040] (4) In the relay provided in the embodiments of the present invention, a filling layer is provided between the rigid part and the insulating cover; the filling layer fills the space formed between the rigid frame structure and the circumferential sidewall of the insulating cover. The filling layer is used to absorb the dimensional tolerances of the insulating cover and the rigid frame structure, fill the gap between the insulating cover and the rigid frame structure, and the filling layer and the rigid frame structure together form a stronger protective structure, and ensure that the protective structure can completely fit the circumferential sidewall of the insulating cover, effectively protect the insulating cover, thereby further improving the safety performance. Attached Figure Description

[0041] Figure 1 The diagram shown is an exploded view of the relay provided in an embodiment of the present invention;

[0042] Figure 2 The diagram shown is a structural schematic of the elastic frame structure in the relay provided in an embodiment of the present invention;

[0043] Figure 3 The diagram shown is a schematic diagram of another structure of the relay provided in an embodiment of the present invention;

[0044] Figure 4 What is shown is Figure 3 The front view of the relay is shown.

[0045] Figure 5 What is shown is Figure 4 A sectional view along line AA;

[0046] Figure 6The diagram shown is a third structural schematic of the relay provided in an embodiment of the present invention.

[0047] Figure 7 The diagram shown is an exploded view of the fourth structure of the relay provided in an embodiment of the present invention;

[0048] Figure 8 The diagram shown is a structural schematic of the rigid frame structure in the relay provided in an embodiment of the present invention. Figure 1 ;

[0049] Figure 9 The diagram shown is a structural schematic of the rigid frame structure in the relay provided in an embodiment of the present invention. Figure 2 ;

[0050] Figure 10 The diagram shown is a structural schematic of the rigid frame structure in the relay provided in an embodiment of the present invention. Figure 3 ;

[0051] Figure 11 The diagram shown is a structural schematic of the rigid frame structure in the relay provided in an embodiment of the present invention. Figure 4 ;

[0052] Figure 12 The diagram shown is a fifth structural schematic of the relay provided in an embodiment of the present invention;

[0053] Figure 13 What is shown is Figure 12 An exploded view of the relay shown;

[0054] Figure 14 What is shown is Figure 12 The front view of the relay is shown.

[0055] Figure 15 What is shown is Figure 14 A cross-sectional view along line BB (fill layer not shown);

[0056] Figure 16 What is shown is Figure 14 A cross-sectional view along line BB;

[0057] Figure 17 The diagram shown is a sixth structural schematic of the relay provided in an embodiment of the present invention;

[0058] Figure 18 The diagram shown is a seventh structural schematic of a relay provided in an embodiment of the present invention;

[0059] Figure 19 The diagram shown is an eighth structural schematic of the relay provided in an embodiment of the present invention (inverted state);

[0060] Figure 20The diagram shown is a ninth structural schematic of a relay provided in an embodiment of the present invention;

[0061] Figure 21 The diagram shown is a tenth structural schematic of a relay provided in an embodiment of the present invention;

[0062] Figure 22 The diagram shown is an eleventh structural schematic of a relay provided in an embodiment of the present invention;

[0063] Figure 23 The diagram shown is a schematic diagram of the twelfth structure of the relay provided in an embodiment of the present invention;

[0064] Figure 24 The diagram shown is a schematic diagram of the twelfth structure of the relay provided in the embodiment of the present invention (showing the filling layer);

[0065] Figure 25 The diagram shown is a thirteenth structural schematic of a relay provided in an embodiment of the present invention;

[0066] Figure 26 What is shown is Figure 25 The diagram shows the internal structure of the relay.

[0067] Figure 27 What is shown is Figure 25 An exploded view of the relay shown;

[0068] Figure 28 The diagram shown is another structural schematic of the elastic frame structure in the relay provided in the embodiment of the present invention;

[0069] Figure 29 The diagram shown is an exploded view of the fourteenth structure of the relay provided in this embodiment of the invention (the heat shrink tubing is in an unshrinked state);

[0070] Figure 30 This is a schematic diagram of the fourteenth structure of the relay provided in an embodiment of the present invention;

[0071] Figure 31 The diagram shown is a schematic diagram of the fifteenth structure of the relay provided in an embodiment of the present invention;

[0072] Figure 32 The diagram shown is a sixteenth structural schematic of a relay provided in an embodiment of the present invention;

[0073] Figure 33 The diagram shown is a seventeenth structural schematic of a relay provided in an embodiment of the present invention.

[0074] The annotations in the attached figures are explained as follows:

[0075] 10-Insulating cover; 11-First sidewall; 12-Second sidewall; 13-Top plate; 14-Outward flange; 20-Stationary contact; 31, 31'-First sub-shell; 32, 32'-Second sub-shell; 40-Yoke plate; 50-Frame piece; 60-Coil frame; 70-Moving contact piece; 100-Elastic frame structure; 101-First side; 102-Second side; 103-Sub-frame; 104-Third side; 105-Reinforcing rib; 200-Rigid frame structure; 201-First sub-rigid... Part; 2011-First plate part; 2012-Second plate part; 2013-Third plate part; 2014-Fourth plate part; 2015-Fifth plate part; 202-Second sub-rigid part; 203-Dovetail groove; 204-Trapezoidal protrusion; 205'-Adhesive layer; 2051-Colloid; 2052-Reinforcing structure; 206-Sleeve; 2061-Sealing groove; 207-Sealing ring; 208-Inner flange; 209-Flanged opening; 210-Permanent magnet; 211-Positioning protrusion; 300-Heat shrink tubing. Detailed Implementation

[0076] 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.

[0077] See Figures 1 to 33 As shown, this embodiment provides a relay, including an insulating cover 10, a contact structure, and a protective structure. The contact structure is housed in the insulating cover 10. The protective structure is disposed on the circumferential sidewall of the insulating cover 10, and the protective structure contacts at least a portion of the circumferential sidewall of the insulating cover 10. The protective structure includes an elastic portion capable of applying pressure toward the inner cavity of the insulating cover 10. And / or, the protective structure includes a rigid portion capable of applying pressure toward the inner cavity of the insulating cover 10.

[0078] The relay provided in this embodiment, by providing a protective structure on the circumferential sidewall of the insulating cover 10, with at least a partial contact between the protective structure and the circumferential sidewall of the insulating cover 10, ensures that the contact system provides safety protection for the insulating cover 10 under extreme conditions such as short circuits and overload disconnection. This improves the sealing reliability of the inner cavity of the insulating cover 10 and the structural strength of the insulating cover 10, meeting the user's high short-circuit resistance requirements. The elastic and / or rigid parts included in the protective structure can apply pressure towards the inner cavity of the insulating cover 10, thereby limiting the outward expansion of the insulating cover 10 and effectively protecting it, especially the relatively weak sidewalls, thus improving safety performance. Furthermore, placing the protective structure on the circumferential sidewall of the insulating cover helps to fully utilize the limited internal space of the product.

[0079] For example, the insulating cover 10 in this embodiment is made of ceramic. 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) and the width direction (indicated by...) Figure 3 (Indicated by arrow D2 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.

[0080] For example, 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.

[0081] See Figure 15 As shown, the contact structure includes two stationary contacts 20 and a moving contact 70. Each mounting hole houses one stationary contact 20, with one stationary contact 20 serving as the terminal for current inflow and the other stationary contact 20 serving as the terminal for current outflow. The moving contact 70 can make or break contact with the stationary contacts 20.

[0082] It should be understood that, in Figure 1 From one perspective, the top plate 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.

[0083] In one embodiment, see Figure 1 , Figure 22 and Figure 23 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.

[0084] In some embodiments, see Figure 22As shown, the protective structure is located on the yoke plate 40.

[0085] In other embodiments, see Figure 23 As shown, the protective structure can also be located on the frame 50.

[0086] The relay also includes a coil holder 60, which is located on the side of the yoke plate 40 away from the protective structure, and a coil is wound on the coil holder.

[0087] 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.

[0088] For example, in the unenergized state, the moving iron core is separated from the stationary iron core, and the moving contact on the moving contact piece is disconnected from the stationary contact on the stationary contact head; when the coil is energized, the moving iron core and the stationary iron core are attracted together, and the moving contact on the moving contact piece makes contact with the stationary contact on the stationary contact head.

[0089] In one embodiment, the protective structure is a frame that surrounds the circumferential sidewall of the insulating cover 10. When the contact system experiences a violent arcing during a short circuit, the temperature rises instantly, and the air pressure inside the ceramic cavity increases rapidly. When the enormous pressure borne by the insulating cover 10 is transmitted to the protective structure, the protective structure can provide pressure from the periphery of the insulating cover 10 to the inner cavity of the insulating cover 10, effectively protecting the insulating cover 10 and improving safety performance.

[0090] In one possible design, the protective structure includes an elastic portion capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover 10.

[0091] During the assembly of the relay, the elastic part 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.

[0092] In this first possible design, see Figure 1As shown, the protective structure is an elastic frame structure 100, which is located outside the insulating cover 10. The elastic frame structure 100 includes an elastic part, which includes two opposing first side parts 101. The two first side parts 101 are located on both sides of the insulating cover 10 to apply a pre-pressure toward the inner cavity of the insulating cover 10.

[0093] For example, see Figure 5 As shown, 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.

[0094] It should be noted that the elastic part may also include two first side parts that are not arranged opposite each other.

[0095] The elastic part also includes two opposing second side portions 102, which are respectively disposed on the outside of the second side wall 12 to apply a pre-pressure toward the inner cavity of the insulating cover 10 to the second side wall 12.

[0096] In this embodiment, the insulating cover 10 has a height direction (with Figure 3 (The arrow D3 indicates the direction) The height direction of the elastic frame structure 100 is consistent with the height direction of the insulating cover 10. In this embodiment, the height of the elastic frame structure 100 is not greater than the height of the insulating cover 10, so as not to increase the dimension of the relay in the height direction. For example, the height of the elastic frame structure 100 is basically equal to the height of the insulating cover 10.

[0097] In some embodiments, see Figure 1 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 sidewalls of the insulating cover 10, thereby more effectively protecting the insulating cover 10 and further improving safety performance.

[0098] For example, see Figure 5 As shown, the middle position of the first side portion 101 undergoes elastic deformation in the direction of approaching the inner cavity of the insulating cover 10, 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.

[0099] 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.

[0100] 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.

[0101] Of course, see Figure 2 As shown, the elastic frame structure 100 can also be formed by bending the ends of the first side portion 101 and the second side portion 102 to form a folded edge, with the folded edges at both ends hooked together. The folded edges can also be welded to further increase the structural strength.

[0102] In other embodiments, see Figure 3 and Figure 4 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.

[0103] 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... Figure 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.

[0104] 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.

[0105] In this embodiment, the elastic part is made of metal.

[0106] In other embodiments, the elastic part may also be made of non-metallic materials, such as plastics capable of elastic deformation.

[0107] 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.

[0108] In the second possible design, see Figures 7 to 27 As shown, the protective structure includes a rigid portion that contacts the circumferential sidewall of the insulating cover 10. For example, the rigid portion is located outside the insulating cover and contacts the outer circumferential sidewall of the insulating cover 10. The rigid portion can protect the insulating cover 10 to improve safety performance.

[0109] In some embodiments, see Figure 7 As shown, the rigid part is a one-piece rigid frame structure 200, which has a circumferentially closed protective space. The insulating cover 10 is located within the protective space. The one-piece rigid frame structure 200 has higher structural strength. When the huge pressure borne by the insulating cover 10 is transmitted to the rigid part, the one-piece rigid frame structure 200 can apply more uniform and stable pressure to the inner cavity of the insulating cover 10 from all sides, effectively protecting the insulating cover 10 and improving safety performance.

[0110] In other embodiments, see Figure 9 and Figure 10 As shown, the rigid part includes a first sub-rigid part 201 and a second sub-rigid part 202. The first sub-rigid part 201 and the second sub-rigid part 202 are fixedly connected to form a rigid frame structure 200.

[0111] For example, the first sub-rigid part 201 includes a first plate part 2011, a second plate part 2012, a third plate part 2013, a fourth plate part 2014, and a fifth plate part 2015. The first plate part 2011 and the second plate part 2012 are disposed opposite each other at both ends of the third plate part 2013. The first plate part 2011 and the second plate part 2012 are both located on the same side of the third plate part 2013. One end of the fourth plate part 2014 is connected to the first plate part 2011, and one end of the fifth plate part 2015 is connected to the second plate part 2012. There is a gap between the fourth plate part 2014 and the fifth plate part 2015. The second sub-rigid part 202 is plate-shaped. One end of the second sub-rigid part 202 is connected to the fourth plate part 2014, and the other end of the second sub-rigid part 202 is connected to the fifth plate part 2015 to seal the gap.

[0112] For example, see Figure 9 As shown, the second sub-rigid part 202 and the first sub-rigid part 201 can be welded together. (See Figure 201) Figure 10 As shown, the second sub-rigid part 202 and the first sub-rigid part 201 can also be riveted together.

[0113] In other embodiments, a limiting part is provided at one end of the rigid part, and a limiting mating part is provided at the other end of the rigid part. The limiting mating part and the limiting part cooperate to form a rigid frame structure 200.

[0114] For example, see Figure 11 As shown, the limiting part can be a dovetail groove 203, and the limiting mating part can be a trapezoidal protrusion 204, which is adapted to the dovetail groove 203. During assembly, the trapezoidal protrusion 204 is confined within the dovetail groove 203 to achieve self-locking, thereby effectively preventing the rigid frame structure 200 from being pushed open.

[0115] The rigid frame structure 200 can be made of metal or non-metal, such as plastic.

[0116] In this second possible design, a filling layer is provided between the rigid part and the insulating cover 10. For example, the filling layer fills the space formed between the rigid frame structure 200 and the circumferential sidewall of the insulating cover 10. The filling layer is used to absorb the dimensional tolerances of the insulating cover 10 and the rigid frame structure 200, fill the gaps between the insulating cover and the rigid frame structure, and the filling layer and the rigid frame structure 200 together form a stronger protective structure, which further effectively protects the insulating cover and thus further improves the safety performance.

[0117] In some embodiments, see Figure 16 As shown, the filling layer is colloid 2051. Colloid 2051 is filled into the space formed between the rigid frame structure 200 and the circumferential sidewalls of the insulating cover 10. After the colloid 2051 cures, it can form an integral structure with the rigid frame structure 200, further enhancing the overall structural strength.

[0118] In other embodiments, see Figure 26 As shown, the filling layer includes a reinforcing structure 2052 and an colloid 2051. The reinforcing structure 2052 is disposed between the circumferential sidewall of the insulating cover 10 and the rigid part, and the colloid 2051 fills the filling space formed between the circumferential sidewall of the insulating cover 10 and the rigid part.

[0119] For example, see Figure 27 As shown, the reinforcing structure 2052 can be a steel bar, which is coiled around the outside of the insulating cover 10. The rigid frame structure 200 is located outside the steel bar. The colloid 2051 fills the filling space formed between the circumferential sidewall of the insulating cover 10 and the rigid part. After the colloid 2051 is cured, it can form an integral structure with the steel bar and the rigid frame structure 200, thereby further enhancing the overall structural strength.

[0120] It should be noted that the reinforcing structure 2052 is not limited to steel bars; as long as it has a certain rigidity and can provide protection, it is acceptable. The colloid 2051 can be epoxy resin adhesive or other flowable and curable hardeners.

[0121] In one embodiment, the relay further includes a leak-proof structure for sealing the bottom of the filling space. During the filling of the colloid 2051, the colloid 2051 is ensured not to flow outwards, but rather to accumulate within the filling space, so that it can better absorb tolerances and fill gaps after curing.

[0122] In one embodiment, see Figures 12 to 16 As shown, the leak-proof structure includes a sleeve 206 with openings at both ends. The sleeve 206 is fitted onto the outside of the insulating cover 10. One end of the sleeve 206 is connected to the yoke plate 40, and the other end of the sleeve 206 is provided with a sealing groove 2061. A rigid part is provided in the sealing groove 2061, and the bottom of the sealing groove 2061 is used to seal the bottom of the filling space.

[0123] In some embodiments, the rigid frame structure 200 is provided with a flared end 209 at the end away from the sleeve 206 to facilitate the injection of adhesive into the filling space from the flared end 209.

[0124] In one embodiment, see Figure 17 As shown, the leak-proof structure can also be a sealing ring 207, which is sleeved on the outside of the insulating cover 10, and the rigid part is set on the sealing ring 207. The bottom of the filling space is sealed by the sealing ring 207.

[0125] In one embodiment, the leak-proof structure may also be an inner flange 208 disposed at one end of the rigid part.

[0126] In some embodiments, see Figure 18 As shown, the inner flange 208 is provided at one end of the top plate 13 of the rigid part away from the insulating cover 10.

[0127] In other embodiments, see Figure 19 As shown, the inner flange 208 can also be provided at one end of the rigid part near the top plate 13 of the insulating cover 10. In this case, during potting, the relay can be inverted, and the inner flange 208 can seal the bottom of the filling space.

[0128] In one embodiment, see Figure 20 As shown, the insulating cover 10 is provided with an outward flange 14, and a rigid part is provided on the outward flange 14. The surface of the outward flange 14 facing the top of the insulating cover 10 forms a leak-proof structure.

[0129] In one embodiment, see Figure 21As shown, when the insulating cover 10 is provided with an outward flange 14, an inward flange 208 can also be provided at the end of the rigid part away from the top plate 13 of the insulating cover 10. This can increase the contact area between the inward flange 208 and the outward flange 14, and prevent the protective structure from shifting and becoming skewed during the glue pouring process, further preventing glue leakage.

[0130] See Figure 22 As shown, when the rigid part comes into contact with the yoke plate 40, the surface of the yoke plate 40 facing the insulating cover 10 can seal the bottom of the filling space.

[0131] See Figure 23 As shown, when the rigid part contacts the frame piece 50, the surface of the frame piece 50 facing the insulating cover 10 can seal the bottom of the filling space. See also Figure 24 As shown, the filling space is filled with colloid.

[0132] In this second possible design, the rigid frame structure 200 can be made of a magnetically conductive material, see [reference needed]. Figure 8 and Figure 11 As shown, the relay also includes a permanent magnet 210, which is located between the rigid frame structure 200 and the circumferential sidewall of the insulating cover 10. The rigid frame structure 200 is in contact with the circumferential sidewall of the insulating cover 10 through the permanent magnet 210.

[0133] For example, there are two permanent magnets 210. The two permanent magnets 210 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-blowing magnetic field to achieve the arc-extinguishing function.

[0134] In one embodiment, the rigid frame structure 200 is provided with a positioning protrusion 211, which is used to position the permanent magnet 210. The positioning protrusion 211 can be formed by stamping the rigid frame structure 200.

[0135] It should be understood that after the permanent magnet 210 is installed, the space between the rigid frame structure 200 and the circumferential sidewall of the insulating cover 10 can also be filled with colloid 2051.

[0136] In this second possible design, the rigid frame structure 200 can also be made of tempered glass.

[0137] It should be noted that the number of rigid frame structures 200 can be one or more, and multiple rigid frame structures 200 are nested in sequence. That is to say, multiple rigid frame structures 200 are arranged in the direction of outward from the inner cavity of the insulating cover 10.

[0138] In other embodiments, the rigid frame structure 200 may also be located inside the insulating cover. In this case, the rigid frame structure 200 is made of an insulating material, such as plastic, and the filling layer is located between the outer surface of the rigid frame structure and the inner wall of the insulating cover.

[0139] In a third possible design, the protective structure includes an elastic part and a rigid part. The elastic part is capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover 10; the rigid part contacts the circumferential sidewall of the insulating cover 10.

[0140] During the assembly of the relay, the elastic part 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 and at the same time restricting the insulating cover 10 from expanding outward. Meanwhile, the rigid part comes into contact with the circumferential sidewall of the insulating cover 10, thereby protecting the insulating cover 10 and improving safety function.

[0141] In this third possible design, see Figure 28 As shown, the elastic part includes two opposing first side portions 101, which are located on both sides of the insulating cover 10 to apply a pre-pressure toward the inner cavity of the insulating cover 10; the rigid part includes two opposing third side portions 104, which are connected between the two first side portions 101 and are in contact with the sidewall of the insulating cover 10.

[0142] 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 safety performance of the second side wall 12, thereby enhancing the overall safety performance.

[0143] For example, the third side portion 104 is integrally formed with the first side portion 101. 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.

[0144] In this third possible design, a filler layer is provided between the rigid part and the insulating cover 10. For example, the filler layer fills the space formed between the third side portion 104 and the second side wall 12. The filler layer is used to absorb tolerances and fill gaps. The filler layer and the rigid part together form a stronger protective layer, further improving safety performance.

[0145] In some embodiments, the filler layer is colloid 2051. Colloid 2051 is filled into the space formed between the third side portion 104 and the second sidewall 12. After the colloid 2051 cures, it can form a stronger protective layer together with the rigid portion, further improving safety performance.

[0146] In other embodiments, the filling layer includes a reinforcing structure 2052 and an colloid 2051. The reinforcing structure 2052 is disposed between the circumferential sidewall of the insulating cover 10 and the rigid portion, and the colloid 2051 fills the filling space formed between the circumferential sidewall of the insulating cover 10 and the rigid portion.

[0147] For example, the reinforcing structure 2052 may be a steel bar coiled around the outside of the insulating cover 10. The reinforcing structure 2052 may also be provided only between the third side portion 104 and the second side wall 12 of the insulating cover 10.

[0148] In this third possible design, the relay also includes a leak-proof structure to seal the bottom of the filling space. The leak-proof structure is essentially the same as that in the second possible design and will not be described further here.

[0149] In this third possible design, the rigid part is made of a magnetically conductive material. There are two permanent magnets 210, located between the third side portion 104 and the second sidewall 12 of the insulating cover 10. The third side portion 104 contacts the second sidewall 12 of the insulating cover 10 via the permanent magnets 210.

[0150] For example, both third side portions 104 are provided with positioning protrusions 211, which are used to position the permanent magnet 210.

[0151] In the fourth possible design, the protective structure is an elastic part that wraps around the circumferential sidewall of the insulating cover 10. The elastic part is in contact with the circumferential sidewall of the insulating cover 10 to apply a pre-pressure toward the inner cavity of the insulating cover 10.

[0152] In this fourth possible design, the elastic part is one of heat shrink tubing 300, cable ties, and adhesive tape.

[0153] For example, see Figure 29 and Figure 30 As shown, when the elastic part is a heat shrink tube 300, the heat shrink tube 300 is first placed on the outside of the insulating cover 10, and then the heat shrink tube 300 is heated and shrunk, tightly wrapping and adhering to the outside of the circumferential side wall of the insulating cover 10, thereby applying a pre-pressure toward the inner cavity of the insulating cover 10 to the insulating cover 10.

[0154] In one embodiment, see Figure 31 and Figure 32As shown, there are multiple protective structures, including at least one elastic frame structure 100 and one rigid frame structure 200. The elastic frame structure 100 and the rigid frame structure 200 are alternately arranged on the circumferential sidewall of the insulating cover 10.

[0155] For example, the elastic frame structure 100 can be a heat shrink tubing, and the rigid frame structure 200 can be a tempered glass film. The heat shrink tubing can be located between the insulating cover 10 and the tempered glass film, and the tempered glass film can also be located between the insulating cover 10 and the heat shrink tubing.

[0156] It should be noted that the number of elastic frame structures 100 is not limited to one, and the form of elastic frame structures 100 is not limited to heat shrink tubing 300. Similarly, the number of rigid frame structures 200 is not limited to one, and the form of rigid frame structures 200 is not limited to tempered glass film. Adhesive can also be filled between the elastic frame structure and the circumferential sidewall of the insulating cover 10, and after curing, it can serve as a rigid frame structure. When there are multiple elastic frame structures 100 and rigid frame structures 200, any arrangement that enhances safety performance is acceptable when arranging the multi-layer protective structure.

[0157] In one embodiment, the relay further includes a housing, with an insulating cover 10 and a protective structure all installed inside the housing. In this case, the housing provides additional protection.

[0158] For example, the housing includes a first sub-housing 31 and a second sub-housing 32, which are fixedly connected to encapsulate the insulating cover 10 and the protective structure within the housing.

[0159] In other embodiments, the protective structure is located outside the insulating shield to form part of the relay housing. See also Figure 33 As shown, the housing self-protection structure extends downwards from one end near the bottom of the insulating cover to enclose the yoke plate, frame plate and coil frame inside.

[0160] For example, the housing may include a first sub-shell 31' and a second sub-shell 32', which are fixedly connected. The first sub-shell 31' is provided with a through hole and a top plate covering the insulating cover is provided with the first sub-shell 31'. The stationary contact protrudes through the through hole. The protective structure is part of the second sub-shell 32'.

[0161] For example, when the protective structure is part of the relay housing, the protective structure can be made of plastic, and an adhesive layer 205' is provided on the inner surface of the protective structure to enhance the fixing effect. Part of the adhesive layer can be the aforementioned filler layer; of course, the aforementioned filler layer can also be used directly as the adhesive layer.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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 protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

2. The relay according to claim 1, characterized in that The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

3. The relay according to claim 2, characterized in that The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

4. The relay according to claim 3, characterized in that The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

5. The relay of claim 3, wherein The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

6. The relay of claim 3, wherein The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

7. The relay according to claim 6, characterized in that The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

8. The relay of claim 6, wherein The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

9. The relay of claim 8, wherein, The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

10. The relay of claim 2, wherein The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

11. The relay according to claim 10, characterized in that The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

12. The relay of claim 11, wherein, The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part.

13. The relay of claim 12, wherein, The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. 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The protective structure is a frame structure, and the frame structure comprises an elastic part and a rigid part. The protective structure is a frame structure, and the frame 14. The relay according to claim 7 or 10, characterized in that The filling layer is filled in a filling space formed between the circumferential side wall of the insulating cover and the rigid part; The filling layer is a colloid; or, the filling layer comprises a reinforcing structure and a colloid, and the reinforcing structure is arranged between the circumferential side wall of the insulating cover and the rigid part.

15. The relay of claim 14, wherein, Further comprising a leakage-proof structure for sealing the bottom of the filling space.

16. The relay of claim 15, wherein, The leakage-proof structure comprises a sleeve with two open ends, the sleeve is sleeved on the outside of the insulating cover, one end of the sleeve is connected with the yoke plate of the relay, the other end of the sleeve is provided with a sealing groove, the rigid part is arranged in the sealing groove, and the groove bottom of the sealing groove is used for sealing the bottom of the filling space.

17. The relay of claim 15, wherein, The leakage-proof structure is a sealing ring, the sealing ring is sleeved on the outside of the insulating cover, and the rigid part is arranged on the sealing ring.

18. The relay of claim 15, wherein, The leakage-proof structure is an inward flanging arranged at one end of the rigid part.

19. The relay of claim 15, wherein, The insulating cover is provided with an outward flanging, the rigid part is arranged on the outward flanging, and the outward flanging forms the leakage-proof structure towards the surface of the top of the insulating cover.

20. The relay of claim 1, wherein, The protective structure is an elastic part, the elastic part is wrapped on the circumferential side wall of the insulating cover, and the elastic part is attached to 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.

21. The relay of claim 20, wherein, The elastic part is one of a heat shrink tube, a cable tie and a tape.

22. The relay of claim 1, wherein, The number of the protective structures is multiple, among the multiple protective structures, at least one protective structure is an elastic frame structure, at least one protective structure is a rigid frame structure, and the elastic frame structure and the rigid frame structure are alternately arranged on the circumferential side wall of the insulating cover.

23. The relay according to any one of claims 1 to 13, 20 to 22, characterized in that Further comprising a shell, and the insulating cover and the protective structure are both mounted in the interior of the shell.

24. The relay according to any one of claims 1 to 13, 20 to 22, characterized in that, The protective structure is located outside the insulating cover to form part of the shell of the relay.

25. The relay according to any one of claims 1 to 13, 20 to 22, characterized in that Further comprising a yoke plate and a frame sheet, the yoke plate is connected to the insulating cover through the frame sheet, and the protective structure is located on the yoke plate or the frame sheet.

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