Relay

Abstract

The utility model relates to the technical field of electronic control devices, in particular to a relay, which comprises a contact structure, an insulating cover and a first 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 accommodated in the insulating cover, and two ends of the movable contact piece can be contacted with or disconnected from the static contacts; at least part of the first protection structure wraps the circumferential side wall of the insulating cover so as to apply pre-pressure towards the inner cavity of the insulating cover to the insulating cover. At least part of the first protection structure wraps the circumferential side wall of the insulating cover, and the first protection structure can tightly wrap and be attached to the outer portion of the circumferential side wall of the insulating cover, so that the pre-pressure facing the inner cavity of the insulating cover can be applied to the insulating cover, the pre-pressure can offset part of outward impact force, the safety performance is improved, and the service life of the insulating cover is prolonged. And meanwhile, the insulation cover is limited to be opened outwards.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic control devices, in particular to a relay. Background Art

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

[0003] In related technologies, the contact system of high-voltage DC relays requires an insulating cover. To ensure reliable contact resistance, a significant portion of these products utilize a ceramic cover, which is filled with a gas such as hydrogen or nitrogen at a certain pressure to aid arc extinguishing. When the contact system arcs violently during a short circuit, the temperature rises instantly. If the insulating cover's structural strength is insufficient, this can compromise the relay's safety performance. Utility Model Content

[0004] The embodiment of the utility model provides a relay to improve the safety performance of the relay.

[0005] The relay provided by an embodiment of the present invention includes a contact structure, an insulating cover and a first protective structure. The contact structure includes multiple static contacts and movable contact pieces. One end of the multiple static contacts and the movable contact piece are both accommodated in the insulating cover, and the two ends of the movable contact piece can contact or disconnect with the static contacts; at least a portion of the first protective structure is wrapped around the circumferential side wall of the insulating cover to apply pre-pressure to the insulating cover toward the inner cavity of the insulating cover.

[0006] According to some embodiments of the present invention, the first protective structure includes at least one of a heat shrink tube, a cable tie, and an adhesive tape.

[0007] According to some embodiments of the present invention, the relay further includes a second protective structure, and the second protective structure is located on a side of the first protective structure away from the insulating cover.

[0008] According to some embodiments of the present invention, the second protective structure is an integrated frame structure; or

[0009] The second protective structure includes a first sub-section and a second sub-section, and the first sub-section is fixedly connected to the second sub-section to form a frame structure; or

[0010] The second protective structure includes a bendable plate-like structure, a limiting portion and a limiting matching portion. The limiting portion is arranged on one side of the bendable plate-like structure, and the limiting matching portion is arranged on the other side of the bendable plate-like structure. The limiting matching portion cooperates with the limiting portion to form a frame structure.

[0011] According to some embodiments of the present invention, the second protective structure includes an elastic frame structure, which is arranged around the outside of the first protective structure. The elastic frame structure can undergo elastic deformation to apply pre-pressure to the insulating cover toward the inner cavity of the insulating cover.

[0012] According to some embodiments of the present invention, the insulating cover has a height direction, and 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 spaced apart along the height direction of the insulating cover.

[0013] According to some embodiments of the present invention, the second protective structure further includes a rigid frame structure, which is disposed between the first protective structure and the elastic frame structure; or, the rigid frame structure is disposed outside the elastic frame structure.

[0014] According to some embodiments of the present invention, the second protective structure includes a rigid frame structure, and the rigid frame structure is arranged around the outside of the first protective structure.

[0015] According to some embodiments of the present invention, a shell is further included, and the insulating cover and the first protective structure are both installed inside the shell.

[0016] According to some embodiments of the present invention, the insulating cover is made of ceramic; the relay also includes a yoke plate and a frame plate, and the yoke plate is connected to the insulating cover through the frame plate; the second protective structure is located on the yoke plate, or the second protective structure is located on the frame plate.

[0017] According to some embodiments of the present invention, a filling layer is provided between the rigid frame structure and the first protective structure.

[0018] According to some embodiments of the present invention, the rigid frame structure is located outside the insulating cover, so that the second protective structure forms a part of the housing of the relay.

[0019] According to some embodiments of the present invention, the filling layer is filled in the glue injection space formed between the circumferential side wall of the insulating cover and the rigid frame structure;

[0020] The filling layer is a colloid; or, the filling layer includes a reinforcing structure and a colloid, and the reinforcing structure is arranged between the circumferential side wall of the insulating cover and the rigid frame structure.

[0021] According to some embodiments of the present invention, the relay further includes a leak-proof structure, and the leak-proof structure is used to seal the bottom of the glue injection space.

[0022] According to some embodiments of the present invention, the leakage-proof structure includes a sleeve with two ends open, the sleeve is sleeved on the outside of the insulating cover, one end of the sleeve is connected to the yoke iron plate of the relay, and the other end of the sleeve is provided with a sealing groove, the rigid frame structure is provided in the sealing groove, and the bottom of the sealing groove is used to block the bottom of the glue injection space;

[0023] Alternatively, the leak-proof structure is a sealing ring, the sealing ring is sleeved on the outside of the insulating cover, and the rigid frame structure is arranged on the sealing ring;

[0024] Alternatively, the leak-proof structure is an inner flange provided at one end of the rigid frame structure;

[0025] Alternatively, the insulating cover is provided with an outer flange, the rigid frame structure is provided on the outer flange, and the surface of the outer flange facing the top of the insulating cover forms the leak-proof structure.

[0026] After long-term observation, testing, and research, the inventors discovered that the main reason for the insufficient structural strength of the insulation cover in existing relays is that, within the limited product space and given the specific factors such as the insulation cover's size, material, and molding process, the strength of the insulation cover, particularly for ceramic materials, can only be increased to a certain extent. As users' short-circuit current requirements continue to increase, the insulation cover's cavity cannot meet these requirements.

[0027] Based on this, one embodiment of the above utility model has at least the following advantages or beneficial effects:

[0028] (1) In the relay provided by the embodiment of the present invention, since at least part of the first protective structure is wrapped around the circumferential side wall of the insulating cover, it can tightly wrap around and fit the outside of the circumferential side wall of the insulating cover, thereby being able to apply a pre-pressure toward the inner cavity of the insulating cover to the insulating cover. The pre-pressure can offset a part of the outward impact force, which is beneficial to improving the safety performance, and at the same time limit the insulating cover from stretching outward, thereby effectively protecting the insulating cover, especially the relatively weak side wall of the insulating cover, thereby improving the safety performance.

[0029] (2) The relay provided in the embodiment of the present invention further includes a second protective structure, which is located on a side of the first protective structure away from the insulating cover. By combining the second protective structure with the first protective structure, the insulating cover can be further effectively protected, thereby further improving safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Shown is a schematic structural diagram of a relay provided by an embodiment of the present utility model;

[0031] Figure 2 Shown is an exploded view of a relay provided by an embodiment of the present utility model;

[0032] Figure 3 Shown is another exploded view of a relay provided by an embodiment of the present utility model;

[0033] Figure 4 Shown is a second structural schematic diagram of a relay provided by an embodiment of the present utility model;

[0034] Figure 5 Shown is a schematic diagram of the elastic frame structure of the relay provided by the embodiment of the present utility model;

[0035] Figure 6 FIG. 1 shows a third structural diagram of a relay provided by an embodiment of the present utility model;

[0036] Figure 7 Shown is Figure 6 Front view of the relay shown;

[0037] Figure 8 Shown is Figure 7 A cross-sectional view along line AA;

[0038] Figure 9 FIG. 4 is a schematic diagram showing a fourth structure of a relay provided by an embodiment of the present utility model;

[0039] Figure 10 Shown is a third exploded view of the relay provided by the embodiment of the present utility model;

[0040] Figure 11 FIG. 5 shows a fifth structural diagram of a relay provided by an embodiment of the present utility model;

[0041] Figure 12 FIG. 6 shows a sixth structural diagram of a relay provided by an embodiment of the present utility model;

[0042] Figure 13 FIG. 7 shows a seventh structural diagram of a relay provided by an embodiment of the present utility model;

[0043] Figure 14 Shown is a schematic diagram of the rigid frame structure in an embodiment of the present utility model;

[0044] Figure 15 Shown is another schematic diagram of the rigid frame structure in an embodiment of the present utility model;

[0045] Figure 16 Shown is a third schematic diagram of the rigid frame structure in an embodiment of the present utility model;

[0046] Figure 17 Shown is a fourth schematic diagram of the rigid frame structure in an embodiment of the present utility model;

[0047] Figure 18 Shown is a schematic diagram of the cooperation between the rigid frame structure and the permanent magnet in an embodiment of the present utility model;

[0048] Figure 19 FIG. 8 is a schematic diagram of an eighth structure of a relay provided by an embodiment of the present utility model;

[0049] Figure 20 Shown is Figure 19 Exploded view of the relay shown;

[0050] Figure 21 Shown is Figure 19 A top view of the relay shown;

[0051] Figure 22 Shown is Figure 21 A cross-sectional view along line BB (the colloid is not shown);

[0052] Figure 23 Shown is Figure 21 A cross-sectional view along line BB;

[0053] Figure 24 FIG. 1 shows a ninth structural diagram of a relay provided by an embodiment of the present utility model;

[0054] Figure 25 The figure shows a tenth structural diagram of a relay provided by an embodiment of the present utility model (the colloid is not shown);

[0055] Figure 26 Shown is an eleventh structural schematic diagram of a relay provided by an embodiment of the present utility model (the colloid is not shown);

[0056] Figure 27 Shown is a twelfth structural schematic diagram of a relay provided by an embodiment of the present utility model (the colloid is not shown);

[0057] Figure 28Shown is a thirteenth structural schematic diagram of a relay provided by an embodiment of the present utility model (the colloid is not shown);

[0058] Figure 29 Shown is a fourteenth structural schematic diagram of a relay provided by an embodiment of the present utility model (the colloid is not shown);

[0059] Figure 30 Shown is a schematic diagram of the fifteenth structure of the relay provided by the embodiment of the present utility model (the colloid is not shown);

[0060] Figure 31 Shown is a sixteenth structural schematic diagram of a relay provided by an embodiment of the present utility model;

[0061] Figure 32 Shown is a seventeenth structural schematic diagram of a relay provided by an embodiment of the present utility model;

[0062] Figure 33 Shown is Figure 32 A cross-sectional view of the relay shown;

[0063] Figure 34 Shown is Figure 32 Exploded view of the relay shown;

[0064] Figure 35 Shown is another schematic diagram of the first protective structure.

[0065] The following are the descriptions of the reference numerals:

[0066] 10-insulating cover; 11-first side wall; 12-second side wall; 13-top plate; 14-outer flange; 20-static contact; 31-first sub-shell; 32-second sub-shell; 40-yoke iron plate; 50-frame plate; 60-coil frame; 70-moving contact plate; 100-first protective structure; 101-side enclosure; 102-top cover; 200-elastic frame structure; 201-first side edge; 202-second side edge; 203-sub-frame; 204-reinforcement rib; 300-rigid frame structure; 3 01-first sub-rigid part; 3011-first plate part; 3012-second plate part; 3013-third plate part; 3014-fourth plate part; 3015-fifth plate part; 302-second sub-rigid part; 3031-dovetail groove; 3032-trapezoidal protrusion; 304-reinforcement rib; 3051-colloid; 3052-reinforcement structure; 306-sleeve; 3061-sealing groove; 307-sealing ring; 308-inner flange; 309-flaring; 310-permanent magnet; 311-positioning protrusion. DETAILED DESCRIPTION

[0067] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0068] See also Figures 1 to 35 As shown, this embodiment provides a relay, including a contact structure, an insulating cover 10 and a first protective structure 100, the contact structure including a plurality of static contacts 20 and a movable contact piece 70, one end of the plurality of static contacts 20 and the movable contact piece 70 are both accommodated in the insulating cover 10, and both ends of the movable contact piece 70 can contact or disconnect with the static contact 20; at least a portion of the first protective structure 100 is wrapped around the circumferential side wall of the insulating cover 10 to apply pre-pressure to the insulating cover 10 toward the inner cavity of the insulating cover 10.

[0069] The relay provided in this embodiment has a first protective structure that is at least partially wrapped around the circumferential side wall of the insulating cover. Therefore, it can tightly wrap around and fit the outside of the circumferential side wall of the insulating cover, thereby being able to apply a pre-pressure toward the inner cavity of the insulating cover to 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 limits the insulating cover from expanding outward, thereby effectively protecting the insulating cover, especially the relatively weak side wall of the insulating cover, thereby improving safety performance.

[0070] For example, the material of the insulating cover 10 in this embodiment is ceramic. Of course, the material of the insulating cover is not limited to ceramic, and can also be plastic. The cross-section of the insulating cover 10 is generally rectangular, for example, the cross-section of the insulating cover 10 can be a rounded rectangle, and the insulating cover 10 has a length direction (in Figure 1 Indicated by the arrow direction D1 in the figure), width direction (indicated by Figure 1 The arrow direction D2 in the figure) and the height direction (indicated by Figure 1 The insulating cover 10 includes a top plate 13 and a circumferential side wall arranged around the edge of the top plate 13. The circumferential side wall includes two first side walls 11 and two second side walls 12. The two first side walls 11 are arranged opposite to each other along the width direction of the insulating cover 10, and the two second side walls 12 are arranged opposite to each other along the length direction of the insulating cover 10.

[0071] Exemplarily, there are two static contacts 20. The top plate 13 of the insulating cover 10 is provided with two mounting holes, spaced apart along the length of the insulating cover 10. Each mounting hole is provided with a static contact 20, one of which serves as a terminal for current inflow, and the other as a terminal for current outflow. One end of the movable contact 70 contacts or disconnects with one of the static contacts 20, while the other end of the movable contact 70 contacts or disconnects with the other static contact 20. Of course, the number of static contacts can also be greater than two, with some of the static contacts contacting or disconnecting with one end of the movable contact, while the other portion of the static contacts contacts or disconnects with the other end of the movable contact.

[0072] It should be understood that in Figure 2 From the perspective of FIG, the top plate 13 of the insulating cover 10 is located above the circumferential side wall. From other perspectives, the top plate may also be located below or on one side of the circumferential side wall.

[0073] See also Figure 1 As shown, the first protective structure 100 may only be wrapped around the circumferential side wall of the insulating cover, see Figure 35 As shown, the first protective structure 100 can also simultaneously wrap the circumferential side walls and the top plate of the insulation cover. Exemplarily, the first protective structure 100 includes a side surrounding portion 101 and a top cover portion 102, and the side surrounding portion 101 and the top cover portion 102 can be integrally formed.

[0074] Exemplarily, the height of the first protective structure 100 is substantially equal to the height of the insulation cover 10 .

[0075] In one embodiment, the first protective structure 100 includes at least one of a heat shrink tube, a cable tie, and an adhesive tape.

[0076] For example, when the first protective structure 100 is a heat shrink tube, the heat shrink tube is first put on the outside of the insulating cover 10, and then the heat shrink tube is shrunk by heat, tightly wrapped and adhered to the outside of the circumferential side wall of the insulating cover 10, so that pre-pressure can be applied to the insulating cover 10 toward the inner cavity of the insulating cover 10.

[0077] In one embodiment, see Figure 1 As shown, the relay further includes a yoke plate 40 and a frame plate 50. The yoke plate 40 is connected to the end of the insulating cover 10 away from the top plate 13 through the frame plate 50. The relay further includes a coil frame 60, which is located on the side of the yoke plate 40 away from the protective structure and has a coil wound thereon.

[0078] Exemplarily, the yoke plate 40 is connected to the end of the insulating cover 10 away from the top plate 13 through a frame plate 50 to enclose 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 static iron core, a moving iron core and a push rod, and the static iron core is fixedly arranged in the second inner cavity; the moving iron core is located in the second inner cavity, the moving contact piece 70 is located in the first inner cavity, and the push rod is passed 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 piece; the moving iron core can be attracted or separated from the static iron core 20, so that the moving contact on the moving contact piece 70 is in contact with or disconnected from the static contact on the static contact head 20.

[0079] In this embodiment, Figure 22 The moving contact piece 70 is shown as an example. Figure 22 The moving contact and the static contact are in the disconnected state.

[0080] In one embodiment, the relay further includes a second protective structure located on a side of the first protective structure 100 away from the insulating cover 10. The second protective structure combined with the first protective structure can further effectively protect the insulating cover, thereby further improving safety performance.

[0081] When the first protective structure 100 simultaneously wraps the circumferential sidewalls and top plate of the insulating cover, the second protective structure can be located on the side of the first protective structure away from the circumferential sidewalls of the insulating cover, or can be located simultaneously on the side of the first protective structure away from the circumferential sidewalls and top plate of the insulating cover. Of course, when the first protective structure 100 only wraps the circumferential sidewalls of the insulating cover 10, the second protective structure can be located only on the side of the first protective structure away from the circumferential sidewalls of the insulating cover, or can be located simultaneously on the side of the first protective structure away from the circumferential sidewalls of the insulating cover and on the top plate 13 of the insulating cover 10.

[0082] For example, see Figure 29 As shown, the second protective structure can be located on the yoke iron plate 40, see Figure 30 As shown, the second protective structure may also be located on the frame piece 50 .

[0083] In some embodiments, the second protective structure is an integrated structure; or, the second protective structure includes a first sub-rigid portion and a second sub-rigid portion, and the first sub-rigid portion is fixedly connected to the second sub-rigid portion to form a rigid frame structure; or, the second protective structure includes a bendable plate-like structure, a limiting portion and a limiting matching portion, the limiting portion is arranged on one side of the bendable plate-like structure, and the limiting matching portion is arranged on the other side of the bendable plate-like structure, and the limiting matching portion cooperates with the limiting portion to form a rigid frame structure.

[0084] In one embodiment, the second protective structure includes an elastic frame structure 200 , which is disposed around the outside of the first protective structure 100 . The elastic frame structure 200 can be elastically deformed to apply pre-pressure to the inner cavity of the insulating cover 10 .

[0085] During the assembly process of the relay, the elastic frame structure 200 undergoes elastic deformation and contacts a portion of the circumferential side wall of the insulating cover 10, thereby applying pre-pressure toward the inner cavity of the insulating cover to 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 limits the insulating cover 10 from expanding outward.

[0086] In some embodiments, the elastic frame structure 200 is an integrated structure.

[0087] In some embodiments, the elastic frame structure 200 includes a first sub-part and a second sub-part, the first sub-part and the second sub-part are respectively a first sub-elastic part and a second sub-elastic part, and the first sub-elastic part is fixedly connected to the second sub-elastic part to form an elastic frame structure.

[0088] In some embodiments, the elastic frame structure 200 includes a bendable elastic plate structure, a limiting portion and a limiting matching portion. The limiting portion is arranged on one side of the bendable plate structure, and the limiting matching portion is arranged on the other side of the bendable plate structure. The limiting matching portion cooperates with the limiting portion to form an elastic frame structure.

[0089] The elastic frame structure 200 includes an elastic portion, which includes two opposite first side portions 201 . The two first side portions 201 are respectively located on both sides of the insulation cover 10 to apply pre-pressure toward the inner cavity of the insulation cover 10 .

[0090] For example, see Figure 8 As shown, the two first side portions 201 are respectively arranged outside the first side wall 11 to apply pre-pressure to the first side wall 11 toward the inner cavity of the insulation cover 10 .

[0091] It should be noted that the elastic portion may also include two first side portions that are not arranged opposite to each other.

[0092] The elastic portion further includes two opposite second side portions 202 . The two second side portions 202 are respectively disposed outside the second side wall 12 to apply pre-pressure to the second side wall 12 toward the inner cavity of the insulation cover 10 .

[0093] In this embodiment, the height direction of the elastic frame structure 200 is consistent with the height direction of the insulating cover 10; Figure 4 As shown, the height of the elastic frame structure 200 is not greater than the height of the insulating cover 10 , thereby not increasing the height dimension of the relay.

[0094] In some embodiments, see Figure 4 As shown, the elastic frame structure 200 extends from one end of the insulating cover 10 to the other along the height direction of the insulating cover 10. This increases the contact area between the elastic frame structure 200 and the circumferential sidewalls of the insulating cover 10, thereby more effectively protecting the insulating cover 10 and further improving safety. It should be understood that the contact between the elastic frame structure 200 and the circumferential sidewalls of the insulating cover 10 is indirect.

[0095] For example, see Figure 8 As shown, the middle position of the first side portion 201 undergoes elastic deformation toward the inner cavity of the insulating cover 10, so that the middle position of the first side portion 201 abuts against the first side wall 11 of the insulating cover 10, and a gap is set between the two ends of the first side portion 201 and the first side wall 11.

[0096] Accordingly, the middle position of the second side portion 202 is elastically deformed toward the inner cavity of the insulating cover 10, so that the middle position of the second side portion 202 abuts against the second side wall 12 of the insulating cover 10, and along the length direction of the insulating cover 10, gaps are set between the two ends of the second side portion 202 and the second side wall 12. Figure 8 The direction of the arrow in the figure indicates the direction of the preload.

[0097] For example, see Figure 3 As shown, the elastic frame structure 200 can be an integrally molded structure having a circumferentially closed protective space, and 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 200 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.

[0098] Of course, see Figure 5 As shown, the elastic frame structure 200 can also be formed by bending a bendable plate-like structure. Specifically, the two ends of the plate-like structure can be bent to form folded edges, and the folded edges at both ends are hooked together. The folded edges can also be welded to further increase the structural strength.

[0099] In other embodiments, see Figure 6 and Figure 7 As shown, the elastic frame structure 200 includes multiple sub-frames 203, which are spaced apart along the height direction of the insulating cover 10. This approach can reduce the material consumption of the elastic frame structure 200, thereby reducing the overall weight of the relay and lowering production costs. In addition, the sub-frames are smaller in size, easier to form, and more precise in dimensional control.

[0100] For example, see Figure 6 As shown, the sub-frame 203 can be made of metal strips, see Figure 9 As shown, the sub-frame 203 can also be made of elastic metal wire. The sub-frame 203 can be an integrally formed structure, or a frame structure formed by fixedly connecting the head and tail. For example, see Figures 6 to 8 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 a sub-frame 203. Figure 9 As shown, both ends of the elastic metal wire are bent to form a hook-shaped structure, and the hook-shaped portions at both ends are hooked together to form a sub-frame 203 .

[0101] The spacing between the multiple sub-frames 203 can be selected according to actual production and processing needs. The multiple sub-frames 203 can all be made of elastic metal wires, or all be made of metal strips, or some sub-frames 203 can be made of elastic metal wires and other sub-frames 203 can be made of metal strips.

[0102] In this embodiment, the elastic portion is made of metal.

[0103] In other embodiments, the elastic portion may also be made of non-metallic material, such as plastic that can undergo elastic deformation.

[0104] It should be noted that the number of the elastic frame structure 200 can be one or more, and the multiple elastic frame structures 200 are arranged in sequence, that is, multiple elastic frame structures 200 are arranged along the inner cavity of the insulating cover 10 toward the outside.

[0105] In one embodiment, the second protective structure further includes a rigid frame structure 300. When the contact system arcs violently at the moment of a short circuit, the temperature rises instantaneously, and the air pressure in the ceramic cavity rises sharply. When the huge pressure on the insulating cover 10 is transmitted outward, the rigid frame structure can provide pressure from all sides of the insulating cover 10 to the inner cavity of the insulating cover 10, effectively protecting the insulating cover 10 and improving safety performance.

[0106] In some embodiments, see Figure 11 As shown, the rigid frame structure 300 is disposed around and between the first protective structure 100 and the elastic frame structure 200 .

[0107] In other embodiments, see Figure 12 As shown, the rigid frame structure 300 may also be disposed around the outside of the elastic frame structure 200 .

[0108] Exemplarily, the first protective structure 100 and the elastic frame structure 200 may both be heat shrink tubes, and the rigid frame structure 300 may be a tempered film. The tempered film may be located outside the two layers of heat shrink tubes or between the two layers of heat shrink tubes.

[0109] It should be noted that the number of elastic frame structures 200 is not limited to one, and the form of the elastic frame structure 200 is not limited to heat shrink tubing. The number of rigid frame structures 300 is not limited to one, and the form of the rigid frame structure 300 is not limited to tempered film. Glue can also be filled between the elastic frame structure and the circumferential side wall of the insulating cover 10, and after curing, it can serve as a rigid frame structure. When the number of one of the elastic frame structure 200 and the rigid frame structure 300 is multiple, when arranging the elastic frame structure 200 and the rigid frame structure 300, any arrangement method that can enhance safety performance is acceptable.

[0110] In other embodiments, the second protective structure may also include only the rigid frame structure 300 and eliminate the elastic frame structure. Figure 13 As shown, the rigid frame structure is arranged around the outside of the first protective structure.

[0111] The form of the rigid frame structure will be described in detail below.

[0112] In some embodiments, see Figure 14 As shown, the rigid frame structure is a one-piece structure with a circumferentially closed protective space. The insulating cover 10 is located within the protective space. The one-piece rigid frame structure 300 has a higher structural strength. When the significant pressure on the insulating cover 10 is transmitted to the rigid frame structure, the one-piece rigid frame structure 300 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.

[0113] In other embodiments, see Figure 15 and Figure 16 As shown, the rigid frame structure 300 includes a first sub-section and a second sub-section, the first sub-section and the second sub-section are respectively a first sub-rigid section 301 and a second sub-rigid section 302 , and the first sub-rigid section 301 is fixedly connected to the second sub-rigid section 302 to form the rigid frame structure 300 .

[0114] Exemplarily, the first sub-rigid portion 301 includes a first plate portion 3011, a second plate portion 3012, a third plate portion 3013, a fourth plate portion 3014 and a fifth plate portion 3015, the first plate portion 3011 and the second plate portion 3012 are arranged opposite to each other at the two ends of the third plate portion 3013, the first plate portion 3011 and the second plate portion 3012 are both located on the same side of the third plate portion 3013, one end of the fourth plate portion 3014 is connected to the first plate portion 3011, one end of the fifth plate portion 3015 is connected to the second plate portion 3012, and there is a gap between the fourth plate portion 3014 and the fifth plate portion 3015; the second sub-rigid portion 302 is plate-shaped, one end of the second sub-rigid portion 302 is connected to the fourth plate portion 3014, and the other end of the second sub-rigid portion 302 is connected to the fifth plate portion 3015 to seal the gap.

[0115] For example, see Figure 15 As shown, the second sub-rigid portion 302 and the first sub-rigid portion 301 can be welded, see Figure 16 As shown, the second sub-rigid portion 302 and the first sub-rigid portion 301 may also be riveted.

[0116] In other embodiments, the rigid frame structure includes a bendable plate-like structure, a limiting portion and a limiting matching portion. The limiting portion is arranged on one side of the bendable plate-like structure, and the limiting matching portion is arranged on the other side of the bendable plate-like structure. The limiting matching portion cooperates with the limiting portion to form a rigid frame structure.

[0117] For example, see Figure 17 As shown, the limiting portion can be a dovetail groove 3031, and the limiting matching portion can be a trapezoidal protrusion 3032, which is adapted to the dovetail groove 3031. During assembly, the trapezoidal protrusion 3032 is limited in the dovetail groove 3031 to achieve self-locking, thereby effectively preventing the rigid frame structure 300 from being stretched.

[0118] The material of the rigid frame structure 300 can be metal or non-metal, such as plastic.

[0119] The material of the rigid frame structure 300 can be a magnetic conductive material, see Figure 17 and Figure 18 As shown, the relay further includes a permanent magnet 310 , which is located between the rigid frame structure 300 and the circumferential side wall of the insulating cover 10 .

[0120] Exemplarily, there are two permanent magnets 310 , which are arranged on both sides of the insulation cover 10 along the length direction of the insulation cover 10 to form an arc-blowing magnetic field to achieve an arc extinguishing function.

[0121] In one embodiment, the rigid frame structure 300 is provided with a positioning protrusion 311, which is used to position the permanent magnet 310. The positioning protrusion 311 can be formed by stamping the rigid frame structure 300.

[0122] It should be understood that after the permanent magnet 310 is provided, the space between the rigid frame structure 300 and the first protective structure may be filled with colloid.

[0123] See also Figure 18 As shown, a corner is formed between two adjacent side walls of the rigid frame structure 300, and a reinforcing rib 304 is provided at the corner to increase the strength of the rigid frame structure 300. Exemplarily, the reinforcing rib 304 is formed by inward stamping to increase the structural strength of the corner.

[0124] In one embodiment, a filling layer is provided between the rigid frame structure 300 and the first protective structure 100. The filling layer can absorb dimensional tolerances between the rigid frame structure and the first protective structure and fill the gap between them. The first protective structure, the filling layer, and the rigid frame structure together form a stronger protective structure, further effectively protecting the insulation cover and thereby further improving safety performance.

[0125] It should be understood that when the first protective structure is a heat shrink tube, the heat shrink tube shrinks after thermal drying. At this time, the external dimensions are uncontrollable, so a gap will inevitably be generated between the rigid frame structure and the outer wall of the shrunk heat shrink tube. By setting a filling layer, the above problem can be effectively solved.

[0126] In some embodiments, see Figure 31 As shown, the filling layer is a colloid, and the colloid 3051 is filled in the glue injection space formed between the rigid frame structure 300 and the first protective structure (not shown in the figure). When the colloid 3051 is cured, it can form an integrated structure with the rigid frame structure 300, and the safety performance is further enhanced.

[0127] In other embodiments, see Figures 32 to 34 As shown, the filling layer includes a reinforcing structure 3052 and a colloid 3051. The reinforcing structure 3052 is arranged between the first protective structure and the rigid frame structure (not shown in the figure), and the colloid is filled in the glue injection space formed between the first protective structure and the rigid frame structure.

[0128] For example, see Figure 33As shown, the reinforcing structure 3052 can be a steel bar, which is coiled around the outside of the insulating cover 10. The rigid frame structure 300 is located outside the steel bar, and the colloid 3051 is filled in the injection space formed between the circumferential side wall of the insulating cover 10 and the rigid frame structure 300. After the colloid 3051 is cured, it can form an integrated structure with the insulating cover, the steel bar and the rigid frame structure 300, thereby further enhancing the structural strength of the insulating cover and improving the safety performance.

[0129] It should be noted that the reinforcement structure 3052 is not limited to steel bars, as long as it has a certain rigidity and can play a protective role. The colloid 3051 can be epoxy resin glue, or other curing agents that can flow and solidify.

[0130] In one embodiment, the relay further includes a leak-proof structure for sealing the bottom of the injection space. During the process of filling the colloid 3051, the colloid 3051 is prevented from flowing outwards and is instead accumulated in the injection space, so as to better absorb tolerances and fill gaps after curing.

[0131] In one embodiment, see Figure 22 and Figure 23 As shown, the leakage-proof structure includes a sleeve 306 with openings at both ends. The sleeve is arranged on the outside of the insulating cover, one end of the sleeve is connected to the yoke iron plate 40, and the other end of the sleeve is provided with a sealing groove 3061. The rigid frame structure 300 is arranged in the sealing groove 3061, and the bottom of the sealing groove is used to seal the bottom of the glue injection space.

[0132] In some embodiments, see Figure 24 As shown, a flared opening 309 is provided at one end of the rigid frame structure 300 away from the sleeve 306 , so as to facilitate the injection of glue into the glue injection space through the flared opening 309 .

[0133] In one embodiment, the leak-proof structure is a sealing ring 307 , which is sleeved on the outside of the insulating cover. The rigid frame structure is disposed on the sealing ring, and the bottom of the glue injection space is sealed by the sealing ring 307 .

[0134] In one embodiment, see Figure 25 As shown, the leak-proof structure may also be an inner flange 308 provided at one end of the rigid frame structure.

[0135] In some embodiments, see Figure 25 As shown, the inner flange 308 is provided at one end of the rigid frame structure 300 away from the top plate 13 of the insulating cover 10 .

[0136] In other embodiments, see Figure 26As shown, the inner flange 308 can also be provided at one end of the rigid frame structure 300 close to the top plate 13 of the insulating cover 10. At this time, when pouring glue, the relay can be turned upside down, and the inner flange 308 can block the bottom of the glue injection space.

[0137] In one embodiment, see Figure 27 As shown, the insulation cover 10 is provided with an outer flange 14 , and the rigid frame structure 300 is provided on the outer flange 14 , and the surface of the outer flange 14 facing the top of the insulation cover forms a leak-proof structure.

[0138] In one embodiment, see Figure 28 As shown, when the insulation cover 10 is provided with an outer flange 14, an inner flange 308 may also be provided at the end of the rigid frame structure 300 away from the insulation cover top plate. This can increase the contact area between the inner flange 308 and the outer flange 14, prevent the protective structure from shifting and causing skew during the glue pouring process, and further prevent glue leakage.

[0139] See also Figure 29 As shown, when the rigid frame structure 300 contacts the yoke plate 40 , the surface of the yoke plate 40 facing the insulation cover 10 can block the bottom of the glue injection space.

[0140] See also Figure 30 As shown, when the rigid frame structure 300 contacts the frame piece 50, the surface of the frame piece 50 facing the insulation cover 10 can play a role in sealing the bottom of the glue injection space. Figure 31 As shown, the injection space is filled with colloid.

[0141] In one embodiment, the relay further comprises a housing, and the insulating cover, the first protective structure and the second protective structure (if any) are all installed inside the housing. In this case, the housing can play a further protective role.

[0142] For example, see Figure 1 As shown, the housing includes a first sub-shell 31 and a second sub-shell 32 , and the first sub-shell 31 and the second sub-shell 32 are fixedly connected to encapsulate the insulating cover 10 and the first protective structure 100 in the housing.

[0143] In one embodiment, the rigid frame structure is positioned outside the relay, so that the second protective structure forms the relay housing. In this case, the rigid frame structure is positioned along the circumferential sidewalls of the insulating cover 10. The second protective structure also includes an extension and a cover. These extensions and the cover can be integrally formed with the rigid frame structure. The extension extends downward from the side of the rigid frame structure 300 near the bottom of the insulating cover to enclose the yoke plate 40, the frame sheet 50, and the coil bobbin. The cover covers the top plate of the insulating cover and is provided with a through-hole through which the static contact extends.

[0144] For example, when the rigid frame structure 300 directly serves as the housing of the relay, the material of the rigid frame structure 300 can be plastic, and an adhesive layer is provided on the inner surface of the rigid frame structure 300 to enhance the fixing effect. A portion of the adhesive layer can be the aforementioned filling layer, and of course, the aforementioned filling layer can also directly serve as the adhesive layer.

[0145] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided by the present invention can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0146] In the embodiments of the utility model, the terms "first," "second," and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. For those skilled in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0147] In the description of the utility model embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, it cannot be understood as a limitation on the utility model embodiments.

[0148] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the utility model. In this specification, schematic representations 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 any one or more embodiments or examples.

[0149] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. Those skilled in the art will readily appreciate that various modifications and variations of the utility model embodiments are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the utility model embodiments shall be included within the scope of protection of the utility model embodiments.

Claims

1. A relay, characterized in that: The device comprises a contact structure, an insulating cover and a first protective structure, wherein the contact structure comprises a plurality of stationary contacts and a movable contact piece, one end of each of the stationary contacts and the movable contact piece are accommodated in the insulating cover, and both ends of the movable contact piece can be in contact with or disconnected from the stationary contacts; At least a portion of the first protective structure is wrapped around the circumferential side wall of the insulation cover to apply a pre-pressure toward the inner cavity of the insulation cover to the insulation cover.

2. The relay according to claim 1, wherein: The first protective structure includes at least one of a heat shrink tube, a cable tie, and an adhesive tape.

3. The relay according to claim 1, wherein: It also includes a second protective structure, which is located on a side of the first protective structure away from the insulating cover.

4. The relay according to claim 3, characterized in that The second protective structure is an integrated frame structure; or The second protective structure includes a first sub-section and a second sub-section, and the first sub-section is fixedly connected to the second sub-section to form a frame structure; or The second protective structure includes a bendable plate-like structure, a limiting portion and a limiting matching portion. The limiting portion is arranged on one side of the bendable plate-like structure, and the limiting matching portion is arranged on the other side of the bendable plate-like structure. The limiting matching portion cooperates with the limiting portion to form a frame structure.

5. The relay according to claim 3, characterized in that The second protective structure includes an elastic frame structure, which is arranged around the outside of the first protective structure. The elastic frame structure can be elastically deformed to apply pre-pressure toward the inner cavity of the insulating cover to the insulating cover.

6. The relay according to claim 5, characterized in that 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 multiple sub-frames, and the multiple sub-frames are arranged at intervals along the height direction of the insulating cover.

7. The relay according to claim 5, characterized in that The second protective structure further includes a rigid frame structure, and the rigid frame structure is disposed between the first protective structure and the elastic frame structure; or the rigid frame structure is disposed outside the elastic frame structure.

8. The relay according to claim 3, characterized in that The second protective structure includes a rigid frame structure, and the rigid frame structure is disposed around the outside of the first protective structure.

9. The relay according to any one of claims 1 to 8, characterized in that: It also includes a shell, and the insulating cover and the first protective structure are both installed inside the shell.

10. The relay according to any one of claims 3 to 8, characterized in that: The insulating cover is made of ceramic; the relay further comprises a yoke plate and a frame plate, the yoke plate is connected to the insulating cover via the frame plate; the second protective structure is located on the yoke plate, or the second protective structure is located on the frame plate.

11. The relay according to claim 7 or 8, characterized in that: A filling layer is provided between the rigid frame structure and the first protective structure.

12. The relay according to claim 11, wherein: The rigid frame structure is located outside the insulating cover, so that the second protective structure forms a part of the housing of the relay.

13. The relay according to claim 11, wherein: The filling layer is filled in the glue injection space formed between the circumferential side wall of the insulating cover and the rigid frame structure; The filling layer is a colloid; or, the filling layer includes a reinforcing structure and a colloid, and the reinforcing structure is arranged between the circumferential side wall of the insulating cover and the rigid frame structure.

14. The relay according to claim 13, characterized in that It also includes a leak-proof structure, which is used to seal the bottom of the glue injection space.

15. The relay according to claim 14, characterized in that The leakage-proof structure includes a sleeve with two ends open, the sleeve is sleeved on the outside of the insulating cover, one end of the sleeve is connected to the yoke plate of the relay, and the other end of the sleeve is provided with a sealing groove, the rigid frame structure is provided in the sealing groove, and the bottom of the sealing groove is used to block the bottom of the glue injection space; Alternatively, the leak-proof structure is a sealing ring, the sealing ring is sleeved on the outside of the insulating cover, and the rigid frame structure is arranged on the sealing ring; Alternatively, the leak-proof structure is an inner flange provided at one end of the rigid frame structure; Alternatively, the insulating cover is provided with an outer flange, the rigid frame structure is provided on the outer flange, and the surface of the outer flange facing the top of the insulating cover forms the leak-proof structure.

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