Relay

Abstract

The present disclosure relates to the technical field of electronic control devices, and specifically relates to a relay. The relay comprises 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 a 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; the protective structure comprises an elastic portion, which is capable of applying to the insulating cover a pressure towards an inner cavity of the insulating cover; and / or, the protective structure comprises a rigid portion, which is capable of applying to the insulating cover a pressure towards the inner cavity of the insulating cover. The relay can ensure that a contact system plays a safety protection role under extreme working conditions such as short circuits and overload breaking, improves the sealing reliability of the cavity and the structural strength of the insulating cover, and meets the high short-circuit resistance requirements of users.

Description

Relay

[0001] The present disclosure claims priority to Chinese Patent Application No. 202411375630.7, filed on September 29, 2024, the entire contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of electronic control devices, and in particular, to a relay. BACKGROUND

[0003] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually applied in an automatic control circuit. The relay is actually a kind of "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic regulation, safety protection, and switching of circuits.

[0004] In the related art, for a high-voltage direct-current relay, the contact system needs to be packaged with an insulating cover. In order to ensure the contact resistance reliability of the contact system, a large part of the products use a ceramic insulating cover for packaging, and a certain pressure of hydrogen or nitrogen gas or the like is filled in the inside for auxiliary arc extinguishing. When the contact system has a short-circuit moment of intense arc, the temperature instantaneously rises. If the structural strength of the insulating cover is insufficient, the safety performance of the relay will be affected. SUMMARY

[0005] The embodiments of the present disclosure provide a relay to improve the safety performance of the relay.

[0006] The relay provided by the embodiments of the present disclosure includes an insulating cover, a contact structure, and a protection structure. The contact structure is accommodated in the insulating cover. The protection structure is arranged on the circumferential side wall of the insulating cover, and at least part of the protection structure is in contact with the circumferential side wall of the insulating cover. The protection structure includes an elastic part that can apply a pressure to the insulating cover towards the inner cavity of the insulating cover. The protection structure also includes a rigid part that can apply a pressure to the insulating cover towards the inner cavity of the insulating cover.

[0007] According to some embodiments of the present disclosure, the protection structure is a frame body that is arranged around the circumferential side wall of the insulating cover.

[0008] The protection structure includes an elastic part that can elastically deform to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover.

[0009] And / or, the protection structure comprises a rigid part in contact with the circumferential sidewall of the insulating cover, so that the rigid part can apply pressure to the insulating cover towards the inner cavity of the insulating cover when the insulating cover applies force to the rigid part.

[0010] According to some embodiments of the present disclosure, the protection structure is an elastic frame structure, and the elastic frame structure comprises an elastic part, and the elastic part comprises two opposite first side edge parts, and the two first side edge parts are respectively located on two sides of the insulating cover to apply pre-pressure to the insulating cover towards the inner cavity of the insulating cover.

[0011] According to some embodiments of the present disclosure, the insulating cover has a height direction, 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 comprises a plurality of sub-frames, and the plurality of sub-frames are arranged at intervals along the height direction of the insulating cover.

[0012] According to some embodiments of the present disclosure, the material of the elastic part is metal.

[0013] According to some embodiments of the present disclosure, the elastic frame structure further comprises a rigid part, and the rigid part comprises two opposite third side edge parts, and the third side edge parts are connected between the two first side edge parts, and the two third side edge parts are in contact with the sidewall of the insulating cover.

[0014] According to some embodiments of the present disclosure, the elastic frame structure further comprises a filling layer between the rigid part and the insulating cover.

[0015] According to some embodiments of the present disclosure, the relay further comprises a permanent magnet between the rigid part and the circumferential sidewall of the insulating cover, and the rigid part is in contact with the circumferential sidewall of the insulating cover through the permanent magnet.

[0016] According to some embodiments of the present disclosure, the rigid part is provided with a positioning protrusion for positioning the permanent magnet.

[0017] According to some embodiments of the present disclosure, the protection structure comprises a rigid part and a filling layer between the rigid part and the insulating cover.

[0018] According to some embodiments of the present disclosure, the rigid part is a rigid frame structure formed integrally;

[0019] Or, the rigid part comprises a first sub-rigid part and a second sub-rigid part, and the first sub-rigid part and the second sub-rigid part are fixedly connected to form a rigid frame structure.

[0020] Or, one side of the rigid part is provided with a limiting part, the other side of the rigid part is provided with a limiting matching part, the rigid part can be bent to make the limiting matching part match with the limiting part to form a rigid frame structure.

[0021] According to some embodiments of the present disclosure, the relay further comprises a permanent magnet between the rigid frame structure and the circumferential side wall of the insulating cover.

[0022] According to some embodiments of the present disclosure, the rigid frame structure is provided with a positioning protrusion for positioning the permanent magnet.

[0023] According to some embodiments of the present disclosure, the filling layer is filled in a filling space formed between the circumferential side wall of the insulating cover and the rigid part;

[0024] The filling layer is a colloid; or, the filling layer comprises a reinforcing structure and a colloid, and the reinforcing structure is arranged between the circumferential side wall of the insulating cover and the rigid part.

[0025] According to some embodiments of the present disclosure, the relay further comprises a leakage prevention structure for sealing the bottom of the filling space.

[0026] According to some embodiments of the present disclosure, the leakage prevention structure comprises a sleeve with two open ends, the sleeve is sleeved on the outside of the insulating cover, one end of the sleeve is connected with the yoke plate of the relay, the other end of the sleeve is provided with a sealing groove, the rigid part is arranged in the sealing groove, and the groove bottom of the sealing groove is used for sealing the bottom of the filling space.

[0027] According to some embodiments of the present disclosure, the rigid part is provided with a flared end away from one end of the sleeve.

[0028] According to some embodiments of the present disclosure, the leakage prevention 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.

[0029] According to some embodiments of the present disclosure, the leakage prevention structure is an inward flanging arranged at one end of the rigid part.

[0030] According to some embodiments of the present disclosure, the insulating cover is provided with an outward flanging, the rigid part is arranged on the outward flanging, and the outward flanging forms the leakage prevention structure towards the surface of the top of the insulating cover.

[0031] According to some embodiments of the present disclosure, the relay further comprises a yoke plate and a frame, the yoke plate is connected to the insulating cover through the frame; the rigid part is in contact with the yoke plate, and the surface of the yoke plate towards the insulating cover forms the leakage prevention structure; or, the rigid part is in contact with the frame, and the surface of the frame towards the insulating cover forms the leakage prevention structure.

[0032] According to some embodiments of the present disclosure, the protection structure is an elastic part, the elastic part is wrapped around the circumferential sidewall of the insulating cover, and the elastic part is in close contact with the circumferential sidewall of the insulating cover to apply a pre-pressing force to the insulating cover towards the inner cavity of the insulating cover.

[0033] According to some embodiments of the present disclosure, the elastic part is one of a heat shrink tube, a cable tie, and a tape.

[0034] According to some embodiments of the present disclosure, the number of protection structures is multiple, among the multiple protection structures, at least one protection structure is an elastic frame structure, at least one protection structure is a rigid frame structure, and the elastic frame structure and the rigid frame structure are alternately arranged on the circumferential sidewall of the insulating cover.

[0035] According to some embodiments of the present disclosure, the relay further comprises a housing, and the insulating cover and the protection structure are both mounted inside the housing.

[0036] According to some embodiments of the present disclosure, the protection structure is located outside the insulating cover to form part of the housing of the relay.

[0037] According to some embodiments of the present disclosure, the relay further comprises a yoke plate and a frame, the yoke plate is connected to the insulating cover through the frame; the protection structure is located on the yoke plate, or the protection structure is located on the frame.

[0038] The inventor has found through long-term observation, testing and research that the main reason for the insufficient structural strength of the insulating cover in the relay in the prior art is that, in the limited product space, and when the size, material, forming process and other factors of the insulating cover are determined, especially for the insulating cover made of ceramic material, the strength can only be improved to a certain extent. In the case of increasing requirements of users for short-circuit current, the cavity of the insulating cover cannot meet the requirements.

[0039] Based on this, one embodiment of the above invention has at least the following advantages or beneficial effects:

[0040] (1) The relay provided by the embodiment of the present disclosure can ensure that the contact system plays a safety protection role under extreme working conditions such as short circuit and overload breaking, improve the sealing reliability of the cavity and the structural strength of the insulating cover, and meet the high short circuit resistance requirement of the user, by arranging the protection structure on the circumferential side wall of the insulating cover, the protection structure being in contact with at least part of the circumferential side wall of the insulating cover. The elastic part and / or the rigid part included in the protection structure can apply a pressure to the insulating cover towards the inner cavity of the insulating cover, thereby limiting the outward expansion of the insulating cover, effectively protecting the insulating cover, especially the relatively weak side wall of the insulating cover, and improving the safety performance. In addition, arranging the protection structure on the circumferential side wall of the insulating cover is conducive to fully utilizing the limited internal space of the product.

[0041] (2) The relay provided by the embodiment of the present disclosure, the protection structure includes an elastic part, the elastic part can be elastically deformed to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover. During the assembly of the relay, the elastic part is elastically deformed and in contact with part of the circumferential side wall of the insulating cover, thereby applying a pre-pressure to the insulating cover towards the inner cavity of the insulating cover. The pre-pressure can offset a part of the outward impact force, which is conducive to improving the safety performance and limiting the outward expansion of the insulating cover.

[0042] (3) The relay provided by the embodiment of the present disclosure, the protection structure includes an elastic part and a rigid part, the elastic part can be elastically deformed to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover; the rigid part is in contact with the circumferential side wall of the insulating cover. During the assembly of the relay, the elastic part is elastically deformed and in contact with part of the circumferential side wall of the insulating cover, thereby applying a pre-pressure to the insulating cover towards the inner cavity of the insulating cover. The pre-pressure can offset a part of the outward impact force, which is conducive to improving the safety performance and limiting the outward expansion of the insulating cover; at the same time, the rigid part 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.

[0043] (4) The relay provided by the embodiment of the present disclosure, a filling layer is arranged 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, the filling layer is used for absorbing the dimensional tolerance of the insulating cover and the rigid frame structure, filling the gap between the insulating cover and the rigid frame structure, the filling layer and the rigid frame structure together form a protection structure with higher strength, and ensure that the protection 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 DRAWINGS

[0044] FIG. 1 shows an exploded view of the relay provided by the embodiment of the present disclosure;

[0045] FIG. 2 shows a structure schematic view of the elastic frame structure in the relay provided by the embodiment of the present disclosure;

[0046] Fig. 3 shows another structural schematic diagram of the relay according to an embodiment of the present disclosure;

[0047] Fig. 4 shows a front view of the relay shown in Fig. 3;

[0048] Fig. 5 shows a sectional view along line A-A of Fig. 4;

[0049] Fig. 6 shows a third structural schematic diagram of the relay according to an embodiment of the present disclosure;

[0050] Fig. 7 shows an exploded view of a fourth structure of the relay according to an embodiment of the present disclosure;

[0051] Fig. 8 shows a structural schematic diagram one of a rigid frame structure in the relay according to an embodiment of the present disclosure;

[0052] Fig. 9 shows a structural schematic diagram two of a rigid frame structure in the relay according to an embodiment of the present disclosure;

[0053] Fig. 10 shows a structural schematic diagram three of a rigid frame structure in the relay according to an embodiment of the present disclosure;

[0054] Fig. 11 shows a structural schematic diagram four of a rigid frame structure in the relay according to an embodiment of the present disclosure;

[0055] Fig. 12 shows a fifth structural schematic diagram of the relay according to an embodiment of the present disclosure;

[0056] Fig. 13 shows an exploded view of the relay shown in Fig. 12;

[0057] Fig. 14 shows a front view of the relay shown in Fig. 12;

[0058] Fig. 15 shows a sectional view along line B-B of Fig. 14 (filling layer not shown);

[0059] Fig. 16 shows a sectional view along line B-B of Fig. 14;

[0060] Fig. 17 shows a sixth structural schematic diagram of the relay according to an embodiment of the present disclosure;

[0061] Fig. 18 shows a seventh structural schematic diagram of the relay according to an embodiment of the present disclosure;

[0062] Fig. 19 shows an eighth structural schematic diagram of the relay according to an embodiment of the present disclosure (inverted state);

[0063] Fig. 20 shows a ninth structural schematic diagram of the relay according to an embodiment of the present disclosure;

[0064] Fig. 21 shows a tenth structure of a relay according to an embodiment of the present disclosure;

[0065] Fig. 22 shows an eleventh structure of a relay according to an embodiment of the present disclosure;

[0066] Fig. 23 shows a twelfth structure of a relay according to an embodiment of the present disclosure;

[0067] Fig. 24 shows a twelfth structure of a relay according to an embodiment of the present disclosure (showing a filling layer);

[0068] Fig. 25 shows a thirteenth structure of a relay according to an embodiment of the present disclosure;

[0069] Fig. 26 shows an internal structure of the relay shown in Fig. 25;

[0070] Fig. 27 shows an exploded view of the relay shown in Fig. 25;

[0071] Fig. 28 shows another structure of an elastic frame structure in a relay according to an embodiment of the present disclosure;

[0072] Fig. 29 shows an exploded view of a fourteenth structure of a relay according to an embodiment of the present disclosure (heat shrink tube in an unshrunk state);

[0073] Fig. 30 shows a fourteenth structure of a relay according to an embodiment of the present disclosure;

[0074] Fig. 31 shows a fifteenth structure of a relay according to an embodiment of the present disclosure;

[0075] Fig. 32 shows a sixteenth structure of a relay according to an embodiment of the present disclosure;

[0076] Fig. 33 shows a seventeenth structure of a relay according to an embodiment of the present disclosure.

[0077] The reference signs are explained as follows: 10-insulating cover; 11-first side wall; 12-second side wall; 13-top plate; 14-flanged edge; 20-static contact; 31, 31'-first sub-shell; 32, 32'-second sub-shell; 40-yoke plate; 50-frame piece; 60-coil holder; 70-moving contact piece; 100-flexible frame structure; 101-first side edge part; 102-second side edge part; 103-sub-frame; 104-third side edge part; 105-stiffener; 200-rigid frame structure; 201-first sub-rigid part; 2011-first plate part; 2012-second plate part; 2013-third plate part; 2014-fourth plate part; 2015-fifth plate part; 202-second sub-rigid part; 203-dovetail groove; 204-trapezoidal protrusion; 205'-adhesive layer; 2051-adhesive; 2052-stiffening structure; 206-sleeve; 2061-sealing groove; 207-sealing ring; 208-inflated edge; 209-flared portion; 210-permanent magnet; 211-positioning protrusion; 300-heat shrink tube. DETAILED DESCRIPTION

[0078] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus a detailed description of the same will be omitted.

[0079] Referring to FIGS. 1-33, the present embodiment provides a relay, which includes an insulating cover 10, a contact structure, and a protection structure, the contact structure being accommodated in the insulating cover 10, and the protection structure being arranged on the circumferential side wall of the insulating cover 10 and contacting at least part of the circumferential side wall of the insulating cover 10, wherein the protection structure includes an elastic part capable of applying pressure to the insulating cover 10 toward the inner cavity of the insulating cover 10, and / or the protection structure includes a rigid part capable of applying pressure to the insulating cover 10 toward the inner cavity of the insulating cover 10.

[0080] The relay provided by the embodiment can ensure that the contact system plays a safe protection role on the insulating cover 10 under extreme working conditions such as short circuit and overload breaking, improve the sealing reliability of the inner cavity of the insulating cover 10 and the structural strength of the insulating cover 10, and meet the high short circuit resistance requirement of the user. The elastic part and / or the rigid part included in the protection structure can apply pressure to the insulating cover 10 towards the inner cavity of the insulating cover 10, thereby limiting the outward expansion of the insulating cover 10, effectively protecting the insulating cover 10, especially the relatively weak side wall of the insulating cover, and improving the safety performance. In addition, the protection structure is arranged on the circumferential side wall of the insulating cover, which is beneficial to fully utilizing the limited internal space of the product.

[0081] For example, as shown in FIG. 3, the material of the insulating cover 10 in the embodiment is ceramic. The shape of the cross section of the insulating cover 10 is generally rectangular, for example, the shape of the cross section of the insulating cover 10 can be a rounded rectangle. The insulating cover 10 has a length direction (indicated by the arrow direction D1 in FIG. 3) and a width direction (indicated by the arrow direction D2 in FIG. 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 oppositely arranged along the width direction of the insulating cover 10, and the two second side walls 12 are oppositely arranged along the length direction of the insulating cover 10.

[0082] For example, the top plate 13 of the insulating cover 10 is provided with two mounting holes, and the two mounting holes are arranged at intervals along the length direction of the insulating cover 10.

[0083] As shown in FIG. 15, the contact structure includes two static contacts 20 and a moving contact 70. One end of the two static contacts 20 and the moving contact 70 are accommodated in the insulating cover. Specifically, one static contact 20 is installed in each mounting hole, one of which serves as a terminal for current inflow, and the other serves as a terminal for current outflow. The moving contact 70 can be in contact or disconnected with the static contact 20.

[0084] It should be understood that, in the view of FIG. 1, the top plate of the insulating cover 10 is located above the circumferential side wall. In other views, the top plate can also be located below or on one side of the circumferential side wall.

[0085] In one embodiment, as shown in FIGS. 1, 22 and 23, the relay further includes a yoke plate 40 and a frame 50. The yoke plate 40 is connected to one end of the insulating cover 10 away from the top plate 13 through the frame 50.

[0086] In some embodiments, as shown in FIG. 22, the protection structure is located on the yoke plate 40.

[0087] In other embodiments, referring to Fig. 23, the protective structure can also be located on the frame 50.

[0088] The relay further comprises a coil holder 60, which is located on the side of the yoke plate 40 away from the protective structure, and a coil is wound on the coil holder.

[0089] For example, the yoke plate 40 is connected to the end of the insulating cover 10 away from the top plate 13 through the frame 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 communicating the first inner cavity and the second inner cavity; the relay further comprises a static core, a dynamic core, and a push rod, the static core is fixedly arranged in the second inner cavity; the dynamic core is located in the second inner cavity, the dynamic contact piece is located in the first inner cavity, the push rod is arranged through the through hole, one end of the push rod is connected to the dynamic core, and the other end of the push rod is connected to the dynamic contact piece; the dynamic core can be attracted to or separated from the static core to make the dynamic contact on the dynamic contact piece contact or disconnect with the static contact on the static contact head.

[0090] For example, in the unpowered state, the dynamic core is separated from the static core, and the dynamic contact on the dynamic contact piece is disconnected from the static contact on the static contact head; when the coil is powered, the dynamic core is attracted to the static core, and the dynamic contact on the dynamic contact piece is in contact with the static contact on the static contact head.

[0091] In one embodiment, referring to Fig. 5, the protective structure is a frame arranged around the circumferential side wall of the insulating cover 10; when the contact system has a violent arc at the moment of short circuit, the temperature rises instantaneously, and the air pressure in the ceramic cavity rises instantaneously; when the huge pressure borne by the insulating cover 10 is transmitted to the protective structure, the protective structure can provide pressure from the four sides of the insulating cover 10 to the inner cavity of the insulating cover 10, effectively protecting the insulating cover 10 and improving the safety performance.

[0092] In a possible design, the protective structure comprises an elastic part, which can be elastically deformed to apply a pre-pressure to the insulating cover 10 towards the inner cavity of the insulating cover 10.

[0093] During the assembly of the relay, the elastic part is elastically deformed and in contact with a part of the circumferential side wall of the insulating cover 10, thereby applying a pre-pressure to the insulating cover 10 towards the inner cavity of the insulating cover 10, which can offset a part of the outward impact force, thereby improving the safety performance and limiting the outward expansion of the insulating cover 10.

[0094] In the first possible design, referring to FIG. 1, the protective structure is an elastic frame structure 100, which is located outside the insulating cover 10, and includes an elastic part, which includes two opposite first side edge parts 101, respectively located at two sides of the insulating cover 10 to apply a pre-pressure to the insulating cover 10 towards the inner cavity of the insulating cover 10.

[0095] For example, referring to FIG. 5, the two first side edge parts 101 are respectively arranged outside the first side wall 11 to apply a pre-pressure to the first side wall 11 towards the inner cavity of the insulating cover 10.

[0096] It should be noted that the elastic part can also include two first side edge parts which are not arranged opposite to each other.

[0097] The elastic part further includes two opposite second side edge parts 102, which are respectively arranged outside the second side wall 12 to apply a pre-pressure to the second side wall 12 towards the inner cavity of the insulating cover 10.

[0098] Referring to FIG. 3, in the embodiment, the insulating cover 10 has a height direction (indicated by the arrow direction D3 in FIG. 3), and the height direction of the elastic frame structure 100 is consistent with the height direction of the insulating cover 10; in the embodiment, the height of the elastic frame structure 100 is not greater than the height of the insulating cover 10, so as not to increase the size of the relay in the height direction. For example, the height of the elastic frame structure 100 is substantially equal to the height of the insulating cover 10.

[0099] In some embodiments, referring to FIG. 1, along the height direction of the insulating cover 10, the elastic frame structure 100 extends from one end of the insulating cover 10 to the other end. In this way, the contact area between the elastic frame structure 100 and the circumferential side wall of the insulating cover 10 can be increased, so as to more effectively protect the insulating cover 10 and further improve the safety performance.

[0100] For example, referring to FIG. 5, the middle position of the first side edge part 101 is elastically deformed towards the direction close to the inner cavity of the insulating cover 10, so that the middle position of the first side edge part 101 abuts against the first side wall 11 of the insulating cover 10, and a gap is arranged between the two ends of the first side edge part 101 and the first side wall 11.

[0101] Correspondingly, the middle position of the second side edge part 102 is elastically deformed towards the direction close to the inner cavity of the insulating cover 10, so that the middle position of the second side edge part 102 abuts against the second side wall 12 of the insulating cover 10, and a gap is arranged between the two ends of the second side edge part 102 and the second side wall 12 along the length direction of the insulating cover 10. In the figure, the arrow direction indicates the direction of the pre-pressure.

[0102] Exemplarily, as shown in FIG. 1, the elastic frame structure 100 can be a one-piece structure having a circumferentially closed protection space, and the insulating cover 10 is located in the protection space. When a large pressure borne by the insulating cover 10 is transmitted to the protection structure, the one-piece elastic frame structure 100 can apply more uniform and stable pre-pressure to the inner cavity of the insulating cover 10 from all directions, effectively protect the insulating cover 10, and improve the safety performance.

[0103] Of course, as shown in FIG. 2, the elastic frame structure 100 can also be formed by bending the edges of the first side portion 101 and the second side portion 102, and then hooking the edges together. The edges can also be welded to further increase the structural strength.

[0104] In other embodiments, as shown in FIGS. 3 and 4, the elastic frame structure 100 includes a plurality of sub-frames 103 arranged along the height direction of the insulating cover 10. This way can reduce the amount of material used in the elastic frame structure 100, thereby reducing the overall weight of the relay and the production cost. In addition, the sub-frames have smaller volume and are easier to form, and the size control is more accurate.

[0105] Exemplarily, as shown in FIG. 3, the sub-frames 103 can be made of metal strips, and as shown in FIG. 6, the sub-frames 103 can also be made of elastic wires. The sub-frames 103 can be one-piece structures or frame structures formed by fixedly connecting the first end to the second end. For example, as shown in FIG. 5, the two ends of the metal strip are bent to form a folded edge, and the two folded edges are hooked together to form the sub-frame 103. For another example, as shown in FIG. 6, the two ends of the elastic wire are bent to form a hook-shaped structure, and the two hook-shaped portions are hooked together to form the sub-frame 103.

[0106] The spacing between the plurality of sub-frames 103 can be selected according to actual production and processing needs. The plurality of sub-frames 103 can be made of elastic wires, or made of metal strips, or some of the sub-frames 103 are made of elastic wires and the others are made of metal strips.

[0107] In this embodiment, the material of the elastic portion is metal.

[0108] In other embodiments, the material of the elastic portion can also be non-metal, such as plastic that can be elastically deformed.

[0109] It should be noted that the number of the elastic frame structure 100 can be one or multiple, and the multiple elastic frame structures 100 are sequentially sleeved, that is, the multiple elastic frame structures 100 are arranged along the direction from the inner cavity of the insulating cover 10 to the outside.

[0110] In a second possible design, referring to FIGS. 7-27, the protective structure includes a rigid portion in contact with the circumferential side wall of the insulating cover 10. Exemplarily, the rigid portion is located outside the insulating cover, in contact with the circumferential outer side wall of the insulating cover 10, and is capable of protecting the insulating cover 10 to improve safety performance.

[0111] In some embodiments, referring to FIG. 7, the rigid portion is a one-piece rigid frame structure 200 having a circumferentially closed protective space in which the insulating cover 10 is located, and the one-piece rigid frame structure 200 has higher structural strength. When the great pressure borne by the insulating cover 10 is transmitted to the rigid portion, the one-piece rigid frame structure 200 is capable of applying more uniform and stable pressure to the inner cavity of the insulating cover 10 from all around, effectively protecting the insulating cover 10 and improving safety performance.

[0112] In other embodiments, referring to FIGS. 9 and 10, the rigid portion includes a first sub-rigid portion 201 and a second sub-rigid portion 202, and the first sub-rigid portion 201 is fixedly connected with the second sub-rigid portion 202 to form the rigid frame structure 200.

[0113] 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 oppositely arranged at two ends of the third plate portion 2013, and both the first plate portion 2011 and the second plate portion 2012 are located on the same side of the third plate portion 2013, one end of the fourth plate portion 2014 is connected with the first plate portion 2011, one end of the fifth plate portion 2015 is connected with the second plate portion 2012, and the fourth plate portion 2014 and the fifth plate portion 2015 have a gap therebetween; the second sub-rigid portion 202 is plate-shaped, one end of the second sub-rigid portion 202 is connected with the fourth plate portion 2014, and the other end of the second sub-rigid portion 202 is connected with the fifth plate portion 2015 to seal the gap.

[0114] Exemplarily, referring to FIG. 9, the second sub-rigid portion 202 can be welded with the first sub-rigid portion 201, and referring to FIG. 10, the second sub-rigid portion 202 can also be riveted with the first sub-rigid portion 201.

[0115] In other embodiments, one end of the rigid portion is provided with a limiting portion, and the other end of the rigid portion is provided with a limiting matching portion, and the limiting matching portion cooperates with the limiting portion to form the rigid frame structure 200.

[0116] For example, referring to FIG. 11, the limiting portion can be a dovetail groove 203, and the limiting matching portion can be a trapezoidal protrusion 204, which is matched with the dovetail groove 203. During assembly, the trapezoidal protrusion 204 is limited in the dovetail groove 203, achieving self-locking, thereby effectively preventing the rigid frame structure 200 from being opened.

[0117] The material of the rigid frame structure 200 can be metal or non-metal, such as plastic.

[0118] In this second possible design, a filling layer is arranged between the rigid portion and the insulating cover 10. For example, the filling layer fills the space formed between the circumferential side wall of the insulating cover 10 and the rigid frame structure 200, and is used to absorb the dimensional tolerance of the insulating cover 10 and the rigid frame structure 200, fill the gap between the insulating cover and the rigid frame structure, and form a higher-strength protective structure with the rigid frame structure 200, further effectively protecting the insulating cover, thereby further improving the safety performance.

[0119] In some embodiments, referring to FIG. 16, the filling layer is a colloid 2051. The colloid 2051 is filled in the space formed between the circumferential side wall of the insulating cover 10 and the rigid frame structure 200, and can form an integrated structure with the rigid frame structure 200 after solidification, further enhancing the overall structural strength.

[0120] In other embodiments, referring to FIG. 26, the filling layer includes a reinforcing structure 2052 and a colloid 2051. The reinforcing structure 2052 is arranged between the circumferential side wall of the insulating cover 10 and the rigid portion, and the colloid 2051 is filled in the filling space formed between the circumferential side wall of the insulating cover 10 and the rigid portion.

[0121] For example, referring to FIG. 27, the reinforcing structure 2052 can be a steel bar, which is wound outside the insulating cover 10, and the rigid frame structure 200 is located outside the steel bar. The colloid 2051 is filled in the filling space formed between the circumferential side wall of the insulating cover 10 and the rigid portion. After solidification, the colloid 2051 can form an integrated structure with the steel bar and the rigid frame structure 200, thereby further enhancing the overall structural strength.

[0122] It should be noted that the reinforcing structure 2052 is not limited to a steel bar, as long as it has a certain rigidity and can play a protective role. The colloid 2051 can be an epoxy resin glue or other flowable and solidifiable curing agents.

[0123] In one embodiment, the relay further comprises a leakage prevention structure for blocking the bottom of the filling space. In the process of filling the gel 2051, it is ensured that the gel 2051 does not flow to the outside, but is gathered in the filling space, so as to better absorb the tolerance and fill the gap after solidification.

[0124] In one embodiment, referring to FIGS. 12-16, the leakage prevention structure comprises a sleeve 206 with both ends open, which is sleeved on the outside of the insulating cover 10, one end of the sleeve 206 is connected with the yoke plate 40, and the other end of the sleeve 206 is provided with a sealing groove 2061, a rigid part is arranged in the sealing groove 2061, and the groove bottom of the sealing groove 2061 is used for blocking the bottom of the filling space.

[0125] In some embodiments, referring to FIG. 15, the flared portion 209 is arranged at the end of the rigid frame structure 200 away from the sleeve 206, so as to facilitate the pouring of the gel into the filling space from the flared portion 209.

[0126] In one embodiment, referring to FIG. 17, the leakage prevention structure can also be a sealing ring 207, which is sleeved on the outside of the insulating cover 10, and a rigid part is arranged on the sealing ring 207, and the sealing ring 207 is used for blocking the bottom of the filling space.

[0127] In one embodiment, referring to FIGS. 18 and 19, the leakage prevention structure can also be an inner flange 208 arranged at one end of the rigid part.

[0128] In some embodiments, referring to FIG. 18, the inner flange 208 is arranged at the end of the rigid part away from the top plate 13 of the insulating cover 10.

[0129] In other embodiments, referring to FIG. 19, the inner flange 208 can also be arranged at the end of the rigid part close to the top plate 13 of the insulating cover 10. At this time, the relay can be inverted during the pouring of the gel, and the inner flange 208 can block the bottom of the filling space.

[0130] In one embodiment, referring to FIG. 20, the insulating cover 10 is provided with an outer flange 14, and the rigid part is arranged on the outer flange 14, and the outer flange 14 forms a leakage prevention structure towards the surface of the top of the insulating cover 10.

[0131] In one embodiment, referring to FIG. 21, when the insulating cover 10 is provided with an outer flange 14, the rigid part away from the top plate 13 of the insulating cover 10 can also be provided with an inner flange 208. In this way, the contact area of the inner flange 208 and the outer flange 14 can be increased, and during the pouring of the gel, the displacement of the protective structure can be prevented to cause the skew phenomenon, and the gel leakage can be further prevented.

[0132] As shown in FIG. 22, when the rigid portion contacts the yoke plate 40, the yoke plate 40 can be directed to the surface of the insulating cover 10 to seal the bottom of the filling space.

[0133] As shown in FIG. 23, when the rigid portion contacts the frame 50, the frame 50 can be directed to the surface of the insulating cover 10 to seal the bottom of the filling space. As shown in FIG. 24, the filling space is filled with the gel.

[0134] In the second possible design, the material of the rigid frame structure 200 can be a magnetic conductive material. As shown in FIGS. 8 and 11, 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 contacts the circumferential side wall of the insulating cover 10 through the permanent magnet 210.

[0135] For example, the number of the permanent magnets 210 is two, and the two permanent magnets 210 are oppositely arranged on the two sides of the insulating cover 10 along the length direction of the insulating cover 10 to form an arc blowing magnetic field to achieve the arc extinguishing function.

[0136] In an embodiment, as shown in FIG. 8, the rigid frame structure 200 is provided with a positioning protrusion 211 for positioning the permanent magnet 210. The positioning protrusion 211 can be formed by stamping the rigid frame structure 200.

[0137] It should be understood that after the permanent magnet 210 is arranged, the space between the rigid frame structure 200 and the circumferential side wall of the insulating cover 10 can also be filled with the gel 2051.

[0138] In the second possible design, the material of the rigid frame structure 200 can also be a tempered film.

[0139] It should be noted that the number of the rigid frame structure 200 can be one or multiple, and the multiple rigid frame structures 200 are sequentially sleeved, that is, along the direction from the inner cavity of the insulating cover 10 to the outside, multiple rigid frame structures 200 are arranged.

[0140] In other embodiments, the rigid frame structure 200 can also be located inside the insulating cover, and the material of the rigid frame structure 200 is an insulating material, for example, plastic. The filling layer is located between the outer surface of the rigid frame structure and the inner wall of the insulating cover.

[0141] In the third possible design, the protection structure includes an elastic portion and a rigid portion. The elastic portion can be elastically deformed to apply a pre-pressure to the insulating cover 10 towards the inner cavity of the insulating cover 10. The rigid portion contacts the circumferential side wall of the insulating cover 10.

[0142] In the assembling 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 to the insulating cover 10 towards the inner cavity of the insulating cover 10, which can offset a part of the outward impact force and improve the safety performance, while limiting the outward expansion of the insulating cover 10; at the same time, the rigid part contacts the circumferential side wall of the insulating cover 10, thereby protecting the insulating cover 10 and improving the safety function.

[0143] In the third possible design, as shown in FIG. 28, the elastic part includes two opposite first side edge parts 101, which are respectively located on both sides of the insulating cover 10 to apply a pre-pressure to the insulating cover 10 towards the inner cavity of the insulating cover 10; the rigid part includes two opposite third side edge parts 104 connected between the two first side edge parts 101, which contact the side wall of the insulating cover 10.

[0144] The two first side edge parts 101 are respectively arranged outside the first side wall 11 to apply a pre-pressure to the first side wall 11 towards the inner cavity of the insulating cover 10; at the same time, the two third side edge parts 104 are respectively arranged outside the second side wall 12 to enhance the safety performance of the second side wall 12, thereby enhancing the overall safety performance.

[0145] For example, the third side edge part 104 is integrally formed with the first side edge part 101. An angle is formed between the first side edge part 101 and the third side edge part 104, and a reinforcing rib 105 is arranged at the angle to increase the strength of the elastic frame structure 100. For example, the reinforcing rib 105 is formed by inward stamping to increase the structural strength at the angle.

[0146] In the third possible design, a filling layer is arranged between the rigid part and the insulating cover 10. For example, the filling layer fills the space formed between the third side edge part 104 and the second side wall 12, and the filling layer is used to absorb tolerances and fill gaps. The filling layer and the rigid part together form a protective layer with higher strength, thereby further improving the safety performance.

[0147] In some embodiments, the filling layer is a colloid 2051. The colloid 2051 is filled in the space formed between the third side edge part 104 and the second side wall 12, and when the colloid 2051 solidifies, it can form a protective layer with higher strength together with the rigid part, thereby further improving the safety performance.

[0148] In other embodiments, the filling layer includes a reinforcing structure 2052 and a colloid 2051. The reinforcing structure 2052 is arranged between the circumferential side wall of the insulating cover 10 and the rigid part, 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.

[0149] Exemplarily, the reinforcing structure 2052 can be a steel bar coiled outside the insulating cover 10. The reinforcing structure 2052 can also be arranged only between the third side edge portion 104 and the second side wall 12 of the insulating cover 10.

[0150] In the third possible design, the relay also includes a leakage prevention structure for plugging the bottom of the filling space. The leakage prevention structure is basically the same as that in the second possible design, and will not be described here again.

[0151] In the third possible design, the material of the rigid portion is a magnetic conductive material. The number of permanent magnets 210 is two, and the two permanent magnets 210 are respectively located between the third side edge portion 104 and the second side wall 12 of the insulating cover 10. The third side edge portion 104 is in contact with the second side wall 12 of the insulating cover 10 through the permanent magnets 210.

[0152] Exemplarily, the two third side edge portions 104 are each provided with a positioning protrusion 211 for positioning the permanent magnet 210.

[0153] In the fourth possible design, the protection structure is an elastic portion, which is wrapped around the circumferential side wall of the insulating cover 10 and is attached to the circumferential side wall of the insulating cover 10 to apply a pre-pressure to the insulating cover 10 towards the inner cavity of the insulating cover 10.

[0154] In the fourth possible design, the elastic portion is one of a heat shrink tube 300, a cable tie, and a tape.

[0155] Exemplarily, as shown in FIGS. 29 and 30, when the elastic portion is the heat shrink tube 300, the heat shrink tube 300 is first sleeved outside the insulating cover 10, and then the heat shrink tube 300 is heated and shrunk to tightly wrap and attach to the outside of the circumferential side wall of the insulating cover 10, so as to be able to apply a pre-pressure to the insulating cover 10 towards the inner cavity of the insulating cover 10.

[0156] In one embodiment, as shown in FIGS. 31 and 32, the number of protection structures is multiple, and among the multiple protection structures, at least one elastic frame structure 100 and one rigid frame structure 200 are arranged alternately on the circumferential side wall of the insulating cover 10.

[0157] Exemplarily, the elastic frame structure 100 can be a heat shrink tube, and the rigid frame structure 200 can be a tempered film. The heat shrink tube can be located between the insulating cover 10 and the tempered film, and the tempered film can also be located between the insulating cover 10 and the heat shrink tube.

[0158] It should be noted that the number of the elastic frame structure 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 the rigid frame structure 200 is not limited to one, and the form of the rigid frame structure 200 is not limited to the tempered film. The elastic frame structure can be filled with glue between the elastic frame structure and the circumferential side wall of the insulating cover 10, and solidified as a rigid frame structure. When the number of one of the elastic frame structure 100 and the rigid frame structure 200 is multiple, as long as the arrangement can enhance the safety performance, the arrangement of the multi-layer protection structure can be any.

[0159] In one embodiment, the relay further comprises a shell, and the insulating cover 10 and the protection structure are both mounted in the interior of the shell. At this time, the shell can further play a protective role.

[0160] For example, the shell comprises 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 protection structure in the shell.

[0161] In other embodiments, the protection structure is located on the outside of the insulating cover to form part of the shell of the relay. Referring to FIG. 33, the shell extends downward from the end of the protection structure close to the bottom of the insulating cover to wrap the yoke plate, the frame piece and the coil holder inside.

[0162] For example, the shell can comprise 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. 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 out of the through hole; and the protection structure is part of the second sub-shell 32'.

[0163] For example, when the protection structure is part of the shell of the relay, the material of the protection structure can be plastic, and the inner surface of the protection structure is provided with a glue layer 205' to enhance the fixing effect. Part of the glue layer can be the filling layer described above, and of course, the filling layer described above can also be directly used as the glue layer.

[0164] Finally, it should be noted that: it can be understood that the various embodiments / implementation modes provided by the present disclosure can be combined with each other without contradiction, which will not be illustrated one by one here.

[0165] In the description of the application embodiments, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like are intended to indicate the orientation or positional relationship shown in the drawings, and are merely used for convenience of description and simplification of description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application embodiments.

[0166] In the description of the application embodiments, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like are intended to indicate the orientation or positional relationship shown in the drawings, and are merely used for convenience of description and simplification of description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application embodiments.

[0167] In the description of the application embodiments, it should be understood that the terms "one embodiment", "some embodiments", "specific embodiments" and the like are intended to mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application embodiments. In the description of the application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0168] The above is only the preferred embodiment of the application embodiments, and is not intended to limit the application embodiments. For those skilled in the art, the application embodiments can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A relay characterized by comprising: The protective structure is arranged on the circumferential side wall of the insulating cover, and at least part of the protective structure is in contact with the circumferential side wall of the insulating cover, wherein the protective structure comprises an elastic part capable of applying pressure to the insulating cover towards the inner cavity of the insulating cover, and / or the protective structure comprises a rigid part capable of applying pressure to the insulating cover towards the inner cavity of the insulating cover.

2. The relay according to claim 1, characterized in that The protective structure is a frame body arranged outside the circumferential side wall of the insulating cover. The protective structure comprises an elastic part capable of elastic deformation to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover. And / or the protective structure comprises a rigid part in contact with the circumferential side wall of the insulating cover, so that when the insulating cover applies a force to the rigid part, the rigid part can apply pressure to the insulating cover towards 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, and the elastic frame structure comprises an elastic part comprising two opposite first side edge parts located on both sides of the insulating cover to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover.

4. The relay according to claim 3, characterized in that The 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 comprises a plurality of sub-frames arranged at intervals along the height direction of the insulating cover.

5. The relay of claim 3, wherein The material of the elastic part is metal.

6. The relay of claim 3, wherein The elastic frame structure further comprises a rigid part comprising two opposite third side edge parts connected between the two first side edge parts, and the third side edge parts are in contact with the side wall of the insulating cover.

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

8. The relay of claim 6, wherein Further comprising a permanent magnet between the rigid part and the circumferential side wall of the insulating cover, and the rigid part is in contact with 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 for positioning the permanent magnet.

10. The relay of claim 2, wherein The protective structure comprises a rigid part and a filling layer between the rigid part and the insulating cover.

11. The relay according to claim 10, characterized in that The rigid part is an integral rigid frame structure; Or, the rigid part comprises a first sub-rigid part and a second sub-rigid part, and the first sub-rigid part and the second sub-rigid part are fixedly connected to form a rigid frame structure; Or, one side edge of the rigid part is provided with a limiting part, and the other side edge of the rigid part is provided with a limiting matching part, and the rigid part can be bent to make the limiting matching part match with the limiting part to form a rigid frame structure.

12. The relay of claim 11, wherein, Further comprising a permanent magnet between the rigid frame structure and the circumferential side wall of the insulating cover.

13. The relay of claim 12, wherein, The rigid frame structure is provided with a positioning protrusion for positioning the permanent magnet.

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

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

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

17. The relay of claim 16, wherein The rigid part is provided with a flared end away from the sleeve.

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

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

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

21. The relay of claim 15, wherein, Further comprising a yoke plate and a frame piece, the yoke plate is connected to the insulating cover through the frame piece; the rigid part is in contact with the yoke plate, and the yoke plate forms the leakage-proof structure towards the surface of the insulating cover; or, the rigid part is in contact with the frame piece, and the frame piece forms the leakage-proof structure towards the surface of the insulating cover.

22. The relay of claim 1, wherein, The protective structure is an elastic part, the elastic part is wrapped around the circumferential side wall of the insulating cover, and the elastic part is in close contact with the circumferential side wall of the insulating cover to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover.

23. The relay of claim 22, wherein, The elastic part is one of a heat shrink tube, a cable tie and a tape.

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

25. The relay according to any one of claims 1 to 13, 22 to 24, characterized in that Further comprising a shell, and the insulating cover and the protective structure are both mounted inside the shell.

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

27. The relay according to any one of claims 1 to 13, 22 to 24, characterized in that Further comprising a yoke plate and a frame piece, 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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