Relay

Abstract

The utility model 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] 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 the embodiment of the present invention includes an insulating cover, a contact structure and a protective structure, wherein the contact structure is accommodated in the insulating cover; the protective structure is arranged on the circumferential side wall of the insulating cover, and the protective structure is in contact with at least part of the circumferential side wall of the insulating cover, wherein the protective structure includes an elastic part, and the elastic part can apply pressure to the insulating cover toward the inner cavity of the insulating cover; and / or the protective structure includes a rigid part, and the rigid part can apply pressure to the insulating cover toward the inner cavity of the insulating cover.

[0006] According to some embodiments of the present invention, the protective structure is a frame, which is arranged around the circumferential side wall of the insulating cover;

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

[0008] And / or, the protective structure includes a rigid portion, which contacts the circumferential side wall of the insulating cover so that when the insulating cover applies a force to the rigid portion, the rigid portion can apply pressure to the insulating cover 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, which includes an elastic portion, and the elastic portion includes two opposite first side portions, which are respectively located on both sides of the insulating cover to apply pre-pressure to the insulating cover toward the inner cavity of 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, and the plurality of sub-frames are spaced apart along the height direction of the insulating cover.

[0011] According to some embodiments of the present invention, the elastic portion 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 opposite third side portions, the third side portions are connected between the two first side portions, and the two third side portions are in contact with the side walls of the insulating cover.

[0013] According to some embodiments of the present invention, the elastic frame structure further includes a filling layer, and the filling layer is located between the rigid part 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 side wall of the insulating cover, and the rigid portion contacts the circumferential side wall of the insulating cover through the permanent magnet.

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

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

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

[0018] Alternatively, the rigid portion 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;

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

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

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

[0022] According to some embodiments of the present invention, the filling layer is filled in a filling space formed between the circumferential side wall of the insulating cover and the rigid portion;

[0023] 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 part.

[0024] 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 filling space.

[0025] According to some embodiments of the present invention, the leakage-proof structure includes a sleeve with openings at both ends, 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 part is provided in the sealing groove, and the bottom of the sealing groove is used to seal the bottom of the filling space.

[0026] According to some embodiments of the present invention, 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.

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

[0028] According to some embodiments of the present invention, the insulating cover is provided with an outer flange, the rigid portion 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.

[0029] According to some embodiments of the present invention, the protective structure is an elastic part, which is wrapped around the circumferential side wall of the insulating cover. The elastic part is fitted with the circumferential side wall of the insulating cover to apply pre-pressure to the insulating cover toward the inner cavity of the insulating cover.

[0030] According to some embodiments of the present invention, the elastic portion is one of a heat shrink tube, a cable tie, and an adhesive tape.

[0031] According to some embodiments of the present invention, there are multiple protective structures, among which 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 side wall 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 a 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 is connected to the insulating cover through the frame plate; the protective structure is located on the yoke plate, or the protective structure is located on the frame plate.

[0035] After long-term observation, testing, and research, the inventors discovered that the main reason for the insufficient structural strength of the insulation cover in conventional 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' requirements for short-circuit current continue to increase, the insulation cover's cavity cannot meet these requirements.

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

[0037] (1) The relay provided by the embodiment of the present invention, by arranging a protective structure on the circumferential side wall of the insulating cover, and the protective structure is in contact with at least part of the circumferential side wall of the insulating cover, can ensure that the contact system plays a safety protection role under extreme working conditions such as short circuit 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. Among them, the elastic part and / or rigid part included in the protective structure can apply pressure to the insulating cover toward the inner cavity of the insulating cover, thereby limiting the insulating cover from expanding outward, effectively protecting the insulating cover, especially protecting the relatively weak side wall of the insulating cover, and improving safety performance. In addition, arranging the protective structure on the circumferential side wall of the insulating cover is conducive to making full use of the limited internal space of the product.

[0038] (2) In the relay provided by the embodiment of the present invention, the protective structure includes an elastic portion, which is capable of elastically deforming to apply a preload to the insulating cover toward the inner cavity of the insulating cover. During the assembly process of the relay, the elastic portion is elastically deformed and contacts a portion of the circumferential side wall of the insulating cover, thereby applying a preload to the insulating cover toward the inner cavity of the insulating cover. This preload can offset a portion of the outward impact force, thereby improving safety performance and limiting the outward expansion of the insulating cover.

[0039] (3) The relay provided by the embodiment of the present invention has a protective structure including an elastic portion and a rigid portion. The elastic portion is capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover to the insulating cover; and the rigid portion is in contact with the circumferential side wall of the insulating cover. During the assembly process of the relay, the elastic portion is elastically deformed and contacts a portion of the circumferential side wall of the insulating cover, thereby applying a pre-pressure toward the inner cavity of the insulating cover to the insulating cover. The 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 portion is in contact with the circumferential side wall of the insulating cover, thereby protecting the insulating cover and improving the structural strength of the insulating cover.

[0040] (4) In the relay provided by the embodiment 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 side wall of the insulating cover, and the filling layer is used to absorb the dimensional tolerance of the insulating cover and the rigid frame structure, and fill the gap between the insulating cover and the rigid frame structure. The filling layer and the rigid frame structure together form a protective structure with higher strength, and ensure that the protective structure can completely fit the circumferential side wall of the insulating cover, effectively protecting the insulating cover, thereby further improving the safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Shown is an exploded view of a relay provided by an embodiment of the present utility model;

[0042] Figure 2 The figure shows a schematic structural diagram of the elastic frame structure in the relay provided by the embodiment of the present utility model;

[0043] Figure 3 Shown is another structural schematic diagram of a relay provided by an embodiment of the present utility model;

[0044] Figure 4 Shown is Figure 3 Front view of the relay shown;

[0045] Figure 5 Shown is Figure 4 A cross-sectional view along line AA;

[0046] Figure 6Shown is a third structural schematic diagram of a relay provided by an embodiment of the present utility model.

[0047] Figure 7 Shown is an exploded view of a fourth structure of a relay provided by an embodiment of the present utility model;

[0048] Figure 8 The figure shows the structure of the rigid frame structure of the relay provided by the embodiment of the utility model. Figure 1 ;

[0049] Figure 9 The figure shows the structure of the rigid frame structure of the relay provided by the embodiment of the utility model. Figure 2 ;

[0050] Figure 10 The figure shows the structure of the rigid frame structure of the relay provided by the embodiment of the utility model. Figure 3 ;

[0051] Figure 11 The figure shows the structure of the rigid frame structure of the relay provided by the embodiment of the utility model. Figure 4 ;

[0052] Figure 12 FIG. 5 shows a fifth structural diagram of a relay provided by an embodiment of the present utility model;

[0053] Figure 13 Shown is Figure 12 Exploded view of the relay shown;

[0054] Figure 14 Shown is Figure 12 Front view of the relay shown;

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

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

[0057] Figure 17 FIG. 6 shows a sixth structural diagram of a relay provided by an embodiment of the present utility model;

[0058] Figure 18 FIG. 7 shows a seventh structural diagram of a relay provided by an embodiment of the present utility model;

[0059] Figure 19 FIG. 8 shows an eighth structural diagram (inverted state) of the relay provided by an embodiment of the present utility model;

[0060] Figure 20 FIG. 1 shows a ninth structural diagram of a relay provided by an embodiment of the present utility model;

[0061] Figure 21 FIG. 10 is a schematic diagram of the structure of a relay provided by an embodiment of the present utility model;

[0062] Figure 22 FIG. 1 shows an eleventh structural diagram of a relay provided by an embodiment of the present utility model;

[0063] Figure 23 Shown is a twelfth structural schematic diagram of a relay provided by an embodiment of the present utility model;

[0064] Figure 24 FIG. 1 shows a twelfth structural schematic diagram of a relay provided by an embodiment of the present utility model (showing a filling layer);

[0065] Figure 25 FIG. 13 is a schematic diagram showing the structure of a relay according to an embodiment of the present invention;

[0066] Figure 26 Shown is Figure 25 The internal structure diagram of the relay shown;

[0067] Figure 27 Shown is Figure 25 Exploded view of the relay shown;

[0068] Figure 28 Shown is another structural schematic diagram of the elastic frame structure in the relay provided by an embodiment of the present utility model;

[0069] Figure 29 Shown is an exploded view of the fourteenth structure of the relay provided by an embodiment of the present utility model (the heat shrink tube is in an unshrinking state);

[0070] Figure 30 14th structural diagram of the relay provided by the embodiment of the present utility model is shown;

[0071] Figure 31 Shown is a fifteenth structural schematic diagram of a relay provided by an embodiment of the present utility model;

[0072] Figure 32 Shown is a sixteenth structural schematic diagram of a relay provided by an embodiment of the present utility model;

[0073] Figure 33 Shown is a seventeenth structural schematic diagram of a relay provided by an embodiment of the present utility model.

[0074] The following are the descriptions of the reference numerals:

[0075] 10-insulating cover; 11-first side wall; 12-second side wall; 13-top plate; 14-outer flange; 20-static contact; 31, 31'-first sub-shell; 32, 32'-second sub-shell; 40-yoke iron plate; 50-frame plate; 60-coil frame; 70-moving contact plate; 100-elastic frame structure; 101-first side portion; 102-second side portion; 103-sub-frame; 104-third side portion; 105-reinforcement rib; 200-rigid frame structure; 201-first sub-rigid Part; 2011-first plate portion; 2012-second plate portion; 2013-third plate portion; 2014-fourth plate portion; 2015-fifth plate portion; 202-second sub-rigid portion; 203-dovetail groove; 204-trapezoidal protrusion; 205'-glue layer; 2051-colloid; 2052-reinforcement structure; 206-sleeve; 2061-sealing groove; 207-sealing ring; 208-inner flange; 209-flaring; 210-permanent magnet; 211-positioning protrusion; 300-heat shrink tube. DETAILED DESCRIPTION

[0076] 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.

[0077] See also Figures 1 to 33 As shown, this embodiment provides a relay, including an insulating cover 10, a contact structure and a protective structure, wherein the contact structure is accommodated in the insulating cover 10; the protective structure is arranged on the circumferential side wall of the insulating cover 10, and the protective structure is in contact with at least part of the circumferential side wall of the insulating cover 10, wherein the protective structure includes an elastic portion, which can apply pressure to the insulating cover toward the inner cavity of the insulating cover 10; and / or the protective structure includes a rigid portion, which can apply pressure to the insulating cover 10 toward the inner cavity of the insulating cover.

[0078] The relay provided in this embodiment provides a protective structure on the circumferential side wall of the insulating cover 10. The protective structure is in at least partial contact with the circumferential side wall of the insulating cover 10, thereby ensuring that the contact system provides safety protection for the insulating cover 10 under extreme working conditions such as short circuit and overload disconnection, thereby improving the sealing reliability of the inner cavity of the insulating cover 10 and the structural strength of the insulating cover 10, and meeting the user's high short-circuit resistance requirements. Among them, the elastic part and / or rigid part included in the protective structure can apply pressure to the insulating cover 10 toward the inner cavity of the insulating cover 10, thereby limiting the insulating cover 10 from expanding outward, effectively protecting the insulating cover 10, especially protecting the relatively weak side wall of the insulating cover, and improving safety performance. In addition, arranging the protective structure on the circumferential side wall of the insulating cover is conducive to making full use of the limited internal space of the product.

[0079] For example, the material of the insulating cover 10 in this embodiment is ceramic. 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 3 The arrow direction D1 in the figure) and the width direction (indicated by Figure 3 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.

[0080] Exemplarily, the top plate 13 of the insulation cover 10 is provided with two mounting holes, and the two mounting holes are spaced apart along the length direction of the insulation cover 10 .

[0081] See also Figure 15 As shown, the contact structure includes two stationary contacts 20 and a movable contact piece 70. Each mounting hole is equipped with a stationary contact 20, wherein one stationary contact 20 serves as a terminal for current inflow and the other stationary contact 20 serves as a terminal for current outflow. The movable contact piece 70 can make or break contact with the stationary contact 20.

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

[0083] In one embodiment, see Figure 1 、 Figure 22 and Figure 23 As shown, the relay further includes a yoke plate 40 and a frame plate 50 . The yoke plate 40 is connected to an 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 may also be located on the frame piece 50 .

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

[0087] 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 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, so that the moving contact on the moving contact piece contacts or disconnects with the static contact on the static contact head.

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

[0089] In one embodiment, the protective structure is in the form of a frame, which is arranged around the circumferential side wall of the insulating cover 10; when the contact system arcs violently at the moment of short circuit, the temperature rises instantly, and the air pressure in the ceramic cavity rises sharply instantly. When the huge pressure borne by the insulating cover 10 is transmitted to the protective structure, the protective 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.

[0090] In a possible design, the protective structure includes an elastic portion that can be elastically deformed to apply a pre-pressure toward the inner cavity of the insulating cover 10 to the insulating cover 10 .

[0091] During the assembly process of the relay, the elastic part undergoes elastic deformation and contacts a portion of the circumferential side wall of the insulating cover 10, thereby applying a pre-pressure toward the inner cavity of the insulating cover 10. The pre-pressure can offset a portion 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.

[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 portion, and the elastic portion includes two opposite first side portions 101. The two first side portions 101 are respectively located on both sides of the insulating cover 10 to apply pre-pressure to the insulating cover 10 toward the inner cavity of the insulating cover 10.

[0093] For example, see Figure 5 As shown, the two first side portions 101 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.

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

[0095] The elastic portion further includes two opposite second side portions 102 . The two second side portions 102 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 .

[0096] In this embodiment, the insulating cover 10 has a height direction (in Figure 3 (indicated by the arrow D3 in the figure), the height of the elastic frame structure 100 is consistent with the height of the insulating cover 10. In this embodiment, the height of the elastic frame structure 100 is no greater than the height of the insulating cover 10, thereby not increasing the height dimension of the relay. For example, the height of the elastic frame structure 100 is substantially equal to the height of the insulating cover 10.

[0097] In some embodiments, see Figure 1 As shown, the elastic frame structure 100 extends from one end of the insulating cover 10 to the other end along the height direction of the insulating cover 10. This can increase the contact area between the elastic frame structure 100 and the circumferential side wall 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 toward 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 set between the two ends of the first side portion 101 and the first side wall 11.

[0099] Accordingly, the middle position of the second side portion 102 undergoes elastic deformation in the direction close to the inner cavity of the insulating cover 10, so that the middle position of the second side portion 102 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 102 and the second side wall 12. Figure 5 The direction of the arrow in the figure 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 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 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 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.

[0102] In other embodiments, see Figure 3 and Figure 4 As shown, the elastic frame structure 100 includes multiple sub-frames 103, 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 100, 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 have more precise dimensional control.

[0103] For example, see Figure 3 As shown, the sub-frame 103 can be made of metal strips, see Figure 6 As shown, the sub-frame 103 can also be made of elastic metal wire. The sub-frame 103 can be an integrally formed structure, or a frame structure formed by fixing the head and tail together. 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 a sub-frame 103. Figure 6 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 the 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 wires, or all be made of metal strips, or some sub-frames 103 can be made of elastic metal wires and other sub-frames 103 can be made of metal strips.

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

[0106] In other embodiments, the elastic portion may also be made of non-metallic material, such as plastic that can undergo elastic deformation.

[0107] It should be noted that the number of the elastic frame structure 100 can be one or more, and the multiple elastic frame structures 100 are arranged in sequence, that is, multiple elastic frame structures 100 are arranged along the inner cavity of the insulating cover 10 toward the outside.

[0108] In a second possible design, see Figures 7 to 27 As shown, the protective structure includes a rigid portion, which contacts the circumferential sidewall of the insulating cover 10. Exemplarily, the rigid portion is located outside the insulating cover and contacts the circumferential outer 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 portion is an integrally formed rigid frame structure 200, which has a circumferentially closed protective space within which the insulating cover 10 is located. This integral rigid frame structure 200 provides enhanced structural strength. When the significant pressure exerted on the insulating cover 10 is transmitted to the rigid portion, the integral rigid frame structure 200 applies a 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.

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

[0111] Exemplarily, the first sub-rigid portion 201 includes a first plate portion 2011, a second plate portion 2012, a third plate portion 2013, a fourth plate portion 2014 and a fifth plate portion 2015, the first plate portion 2011 and the second plate portion 2012 are arranged opposite to each other at the two ends of the third plate portion 2013, the first plate portion 2011 and the second plate portion 2012 are both located on the same side of the third plate portion 2013, one end of the fourth plate portion 2014 is connected to the first plate portion 2011, one end of the fifth plate portion 2015 is connected to the second plate portion 2012, and there is a gap between the fourth plate portion 2014 and the fifth plate portion 2015; the second sub-rigid portion 202 is plate-shaped, one end of the second sub-rigid portion 202 is connected to the fourth plate portion 2014, and the other end of the second sub-rigid portion 202 is connected to the fifth plate portion 2015 to seal the gap.

[0112] For example, see Figure 9 As shown, the second sub-rigid portion 202 and the first sub-rigid portion 201 can be welded, see Figure 10 As shown, the second sub-rigid portion 202 and the first sub-rigid portion 201 may also be riveted.

[0113] In other embodiments, a limiting portion is provided at one end of the rigid portion, and a limiting matching portion is provided at the other end of the rigid portion. The limiting matching portion cooperates with the limiting portion to form a rigid frame structure 200 .

[0114] For example, see Figure 11 As shown, the limiting portion can be a dovetail groove 203, and the limiting matching portion can be a trapezoidal protrusion 204, which is adapted to the dovetail groove 203. During assembly, the trapezoidal protrusion 204 is limited in the dovetail groove 203 to achieve self-locking, thereby effectively preventing the rigid frame structure 200 from being stretched.

[0115] The material of the rigid frame structure 200 can be 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; illustratively, the filling layer fills the space formed between the rigid frame structure 200 and the circumferential side wall of the insulating cover 10, and the filling layer is used to absorb the dimensional tolerance of the insulating cover 10 and the rigid frame structure 200, and fill the gap between the insulating cover and the rigid frame structure. The filling layer and the rigid frame structure 200 together form a higher strength protective structure, which further effectively protects the insulating cover, thereby further improving the safety performance.

[0117] In some embodiments, see Figure 16 As shown, the filling layer is a colloid 2051. The colloid 2051 is filled in the space formed between the rigid frame structure 200 and the circumferential side wall of the insulating cover 10. When the colloid 2051 is cured, it can form an integrated 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 a colloid 2051 . The reinforcing structure 2052 is disposed between the circumferential side wall of the insulating cover 10 and the rigid portion. The colloid 2051 is filled in the filling space formed between the circumferential side wall of the insulating cover 10 and the rigid portion.

[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, and the colloid 2051 is filled in the filling space formed between the circumferential side wall of the insulating cover 10 and the rigid part. After the colloid 2051 is cured, it can form an integrated 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 reinforcement structure 2052 is not limited to steel bars, as long as it has a certain rigidity and can play a protective role. The colloid 2051 can be epoxy resin glue, or other curing agents that can flow and solidify.

[0121] In one embodiment, the relay further includes a leak-proof structure for sealing the bottom of the filling space. During the process of filling the colloid 2051, the colloid 2051 is prevented from flowing outwards and is instead accumulated in the filling space, so as to better absorb tolerances and fill gaps after curing.

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

[0123] In some embodiments, a flared opening 209 is provided at one end of the rigid frame structure 200 away from the sleeve 206 , so as to facilitate glue pouring into the filling space through the flared opening 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, and the bottom of the filling space is blocked by the sealing ring 207.

[0125] In one embodiment, the leakage-proof structure may also be an inner flange 208 provided at one end of the rigid portion.

[0126] In some embodiments, see Figure 18 As shown, the inner flange 208 is provided at one end of the rigid portion away from the top plate 13 of 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 portion 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 208 can block the bottom of the filling space.

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

[0129] In one embodiment, see Figure 21As shown, when the insulation cover 10 is provided with an outer flange 14, an inner flange 208 may also be provided at the end of the rigid portion away from the top plate 13 of the insulation cover 10. This can increase the contact area between the inner flange 208 and the outer flange 14, prevent the protective structure from shifting and causing skew during the glue pouring process, and further prevent glue leakage.

[0130] See also Figure 22 As shown, when the rigid portion contacts the yoke plate 40 , the surface of the yoke plate 40 facing the insulation cover 10 can block the bottom of the filling space.

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

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

[0133] Exemplarily, there are two permanent magnets 210 , 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 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 provided, the space between the rigid frame structure 200 and the circumferential side wall of the insulating cover 10 may be filled with the colloid 2051 .

[0136] In the second possible design, the material of the rigid frame structure 200 may also be a tempered film.

[0137] It should be noted that the number of the rigid frame structure 200 can be one or more, and the multiple rigid frame structures 200 are arranged in sequence, that is, multiple rigid frame structures 200 are arranged along the inner cavity of the insulating cover 10 toward the outside.

[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 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 portion and a rigid portion. The elastic portion can undergo elastic deformation to apply pre-pressure toward the inner cavity of the insulating cover 10 ; the rigid portion contacts the circumferential side wall of the insulating cover 10 .

[0140] During the assembly process of the relay, the elastic part is elastically deformed and contacts a part 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. The pre-pressure can offset a part of the outward impact force, which is beneficial to improving the safety performance and limiting the outward expansion of the insulating cover 10; at the same time, the rigid part is contacted with the circumferential side wall of the insulating cover 10, thereby protecting the insulating cover 10 and improving the safety function.

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

[0142] The two first side portions 101 are respectively arranged on the outside of the first side wall 11 to apply pre-pressure to the first side wall 11 toward the inner cavity of the insulating cover 10; at the same time, the two third side portions 104 are respectively arranged 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] Exemplarily, 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. Exemplarily, the reinforcing rib 105 is formed by inward stamping to increase the structural strength of the corner.

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

[0145] In some embodiments, the filling layer is a colloid 2051. The colloid 2051 is filled in the space between the third side portion 104 and the second side wall 12. When the colloid 2051 solidifies, 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 a colloid 2051 . The reinforcing structure 2052 is disposed between the circumferential side wall of the insulating cover 10 and the rigid portion. The colloid 2051 is filled in the filling space formed between the circumferential side wall of the insulating cover 10 and the rigid portion.

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

[0148] In the third possible design, the relay also includes a leak-proof structure for sealing the bottom of the filling space. The leak-proof structure is substantially the same as that in the second possible design and will not be described in detail here.

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

[0150] Exemplarily, each of the two third side portions 104 is provided with a positioning protrusion 211 , and the positioning protrusion 211 is used to position the permanent magnet 210 .

[0151] In a fourth possible design, the protective structure is an elastic part, which is wrapped around the circumferential side wall of the insulating cover 10. The elastic part fits the circumferential side wall of the insulating cover 10 to apply pre-pressure toward the inner cavity of the insulating cover 10.

[0152] In the fourth possible design, the elastic portion is one of the heat shrink tube 300 , a cable tie, and an 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 sleeved on the outside of the insulating cover 10, and then the heat shrink tube 300 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 toward the inner cavity of the insulating cover 10 can be applied 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 side wall of the insulating cover 10 .

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

[0156] It should be noted that the number of elastic frame structures 100 is not limited to one, and the form of the elastic frame structure 100 is not limited to the heat shrink tube 300. The number of rigid frame structures 200 is not limited to one, and the form of the rigid frame structure 200 is not limited to a 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 either the elastic frame structure 100 or the rigid frame structure 200 is multiple, when arranging the multi-layer protective structure, any arrangement method that can enhance safety performance is acceptable.

[0157] In one embodiment, the relay further comprises a housing, and the insulating cover 10 and the protective structure are both installed inside the housing. In this case, the housing can play a further protective role.

[0158] Exemplarily, 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 protective structure in the housing.

[0159] In other embodiments, the protective structure is located outside the insulating cover to form a part of the housing of the relay. Figure 33 As shown, the shell extends downward from one end of the protective structure close to the bottom of the insulating cover to wrap the yoke iron plate, the frame sheet and the coil frame inside.

[0160] Exemplarily, the shell may include a first sub-shell 31' and a second sub-shell 32', the first sub-shell 31' and the second sub-shell 32' are fixedly connected, the first sub-shell 31' is provided with a through hole, the first sub-shell 31' covers the top plate of the insulating cover, and the static contact passes through the through hole; the protective structure is part of the second sub-shell 32'.

[0161] For example, when the protective structure serves as part of the relay housing, the protective structure may be made of plastic, and an adhesive layer 205' may be provided on the inner surface of the protective structure to enhance the fixing effect. A portion of the adhesive layer may be the aforementioned filling layer, or the aforementioned filling layer may also directly serve as the adhesive layer.

[0162] 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.

[0163] In the embodiments of the utility model, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", "fixed", and "contacted" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium; "contacted" can be a direct contact or an indirect contact. 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.

[0164] 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.

[0165] 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.

[0166] 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: It includes an insulating cover, a contact structure and a protective structure, wherein the contact structure is accommodated in the insulating cover; the protective structure is arranged on the circumferential side wall of the insulating cover, and the protective structure is in contact with at least part of the circumferential side wall of the insulating cover, wherein the protective structure includes an elastic part, and the elastic part can apply pressure to the insulating cover toward the inner cavity of the insulating cover; and / or the protective structure includes a rigid part, and the rigid part can apply pressure to the insulating cover toward the inner cavity of the insulating cover.

2. The relay according to claim 1, wherein: The protective structure is a frame, and is arranged outside the circumferential side wall of the insulating cover; The protective structure includes an elastic portion, which is capable of elastic deformation to apply a pre-pressure toward the inner cavity of the insulating cover to the insulating cover; And / or, the protective structure includes a rigid portion, which contacts the circumferential side wall of the insulating cover so that when the insulating cover applies a force to the rigid portion, the rigid portion can apply pressure to the insulating cover toward the inner cavity of the insulating cover.

3. The relay according to claim 2, characterized in that The protective structure is an elastic frame structure, which includes an elastic part. The elastic part includes two opposite first side parts, and the two first side parts are respectively located on both sides of the insulating cover to apply pre-pressure to the insulating cover toward the inner cavity of the insulating cover.

4. The relay according to claim 3, characterized in that The insulating cover has a height direction; along the height direction of the insulating cover, the elastic frame structure extends from one end of the insulating cover to the other end; or, the elastic frame structure includes a plurality of sub-frames, and the plurality of sub-frames are spaced apart along the height direction of the insulating cover.

5. The relay according to claim 3, characterized in that The elastic part is made of metal.

6. The relay according to claim 3, characterized in that The elastic frame structure further includes a rigid portion, which includes two opposite third side portions. The third side portions are connected between the two first side portions, and the two third side portions are in contact with the side walls of the insulating cover.

7. The relay according to claim 6, characterized in that The elastic frame structure further includes a filling layer, and the filling layer is located between the rigid part and the insulating cover.

8. The relay according to claim 6, characterized in that The device further includes a permanent magnet located between the rigid portion and the circumferential side wall of the insulating cover, and the rigid portion contacts the circumferential side wall of the insulating cover through the permanent magnet.

9. The relay according to claim 8, characterized in that The rigid part is provided with a positioning protrusion, and the positioning protrusion is used to position the permanent magnet.

10. The relay according to claim 2, wherein: The protective structure includes a rigid part and a filling layer, and the filling layer is located between the rigid part and the insulating cover.

11. The relay according to claim 10, characterized in that The rigid part is an integrally formed rigid frame structure; Alternatively, the rigid portion 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; Alternatively, a limiting portion is provided on one side of the rigid portion, and a limiting matching portion is provided on the other side of the rigid portion. The rigid portion can be bent so that the limiting matching portion matches the limiting portion to form a rigid frame structure.

12. The relay according to claim 11, wherein: It also includes a permanent magnet, which is located between the rigid frame structure and the circumferential side wall of the insulating cover.

13. The relay according to claim 12, wherein: The rigid frame structure is provided with a positioning protrusion, and the positioning protrusion is used to position the permanent magnet.

14. The relay according to claim 7 or 10, characterized in that: The filling layer is filled in the 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 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 part.

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

16. The relay according to claim 15, characterized in that The leakage-proof structure includes a sleeve with openings at both ends, which 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 part is provided in the sealing groove, and the bottom of the sealing groove is used to seal the bottom of the filling space.

17. The relay according to claim 15, characterized in that The anti-leakage structure is a sealing ring, which is sleeved on the outside of the insulating cover, and the rigid part is arranged on the sealing ring.

18. The relay according to claim 15, wherein: The anti-leakage structure is an inner flange arranged at one end of the rigid part.

19. The relay according to claim 15, wherein: The insulating cover is provided with an outer flange, the rigid portion 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.

20. The relay according to claim 1, wherein The protective structure is an elastic part, which is wrapped around the circumferential side wall of the insulation cover. The elastic part is in contact with the circumferential side wall of the insulation cover to apply pre-pressure to the insulation cover toward the inner cavity of the insulation cover.

21. The relay according to claim 20, characterized in that The elastic portion is one of a heat shrink tube, a cable tie, and an adhesive tape.

22. The relay according to claim 1, wherein There are multiple protective structures, among which at least one protective structure is an elastic frame structure and at least one protective structure is a rigid frame structure. 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 and 20 to 22, characterized in that: It also includes a shell, and the insulating cover and the protective structure are both installed inside the shell.

24. The relay according to any one of claims 1 to 13 and 20 to 22, characterized in that The protection structure is located outside the insulation cover to form a part of the housing of the relay.

25. The relay according to any one of claims 1 to 13 and 20 to 22, characterized in that It also includes a yoke plate and a frame piece, wherein the yoke plate is connected to the insulating cover through the frame piece; the protective structure is located on the yoke plate, or the protective structure is located on the frame piece.

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