Relay

Abstract

The present disclosure relates to the technical field of electronic control devices, and specifically relates to a relay, which comprises a contact structure, an insulating cover and a frame structure, wherein the contact structure comprises a plurality of stationary contacts and a movable contact piece, one end of each of the plurality of stationary contacts and the movable contact piece are all accommodated in the insulating cover, and two ends of the movable contact piece can come into contact with or disengage from the stationary contacts; and a filling layer is provided between the frame structure and the insulating cover, and the frame structure is in indirect contact with the circumferential side wall of the insulating cover by means of the filling layer. By means of providing the filling layer between the frame structure and the insulating cover, the filling layer fills the space formed between the frame structure and the circumferential side wall of the insulating cover, the frame structure comes into contact with the circumferential side wall of the insulating cover by means of the filling layer, the filling layer is configured to absorb the dimensional tolerance between the insulating cover and the frame structure and fill a gap between the insulating cover and the frame structure, and the filling layer and the frame structure jointly form a protective structure with higher strength, and ensure that the protective structure fully fits to the circumferential side wall of the insulating cover, thereby improving the safety performance.

Description

Relay

[0001] The present disclosure claims priority to Chinese Patent Application No. 202411374998.1, 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 small current to control a large 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 is filled in the inside for auxiliary arc extinguishing. However, when the contact system has a short-circuit moment of intense arc, the gas pressure will instantaneously and rapidly rise. 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 a contact structure, an insulating cover, and a frame structure. The contact structure includes a plurality of static contacts and a dynamic contact piece. One end of each of the plurality of static contacts and the dynamic contact piece are accommodated in the insulating cover. The two ends of the dynamic contact piece can be in contact with or disconnected from the static contacts. A filling layer is arranged between the frame structure and the circumferential side wall of the insulating cover. The frame structure indirectly contacts the circumferential side wall of the insulating cover through the filling layer.

[0007] According to some embodiments of the present disclosure, a filling space is formed between the frame structure and the circumferential side wall of the insulating cover. The filling layer is located in the filling space.

[0008] The relay further includes a leakage prevention structure for plugging the bottom of the filling space.

[0009] According to some embodiments of the present disclosure, the leakage prevention structure comprises a sleeve open at both ends, the sleeve is sleeved outside 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 frame structure is arranged in the sealing groove, and the groove bottom of the sealing groove is used for plugging the bottom of the filling space.

[0010] According to some embodiments of the present disclosure, the frame structure is provided with a flared end away from one end of the sleeve.

[0011] According to some embodiments of the present disclosure, the leakage prevention structure comprises a sealing ring, the sealing ring is sleeved outside the insulating cover, and the frame structure is arranged on the sealing ring.

[0012] According to some embodiments of the present disclosure, the leakage prevention structure is an inward flanging arranged at one end of the frame structure.

[0013] According to some embodiments of the present disclosure, the insulating cover is provided with an outward flanging, the frame structure 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.

[0014] According to some embodiments of the present disclosure, the relay further comprises a yoke plate and a frame piece, the yoke plate is connected to the insulating cover through the frame piece; the frame structure is located on the yoke plate, the yoke plate forms the leakage prevention structure towards the surface of the insulating cover; or, the frame structure is located on the frame piece, and the frame piece forms the leakage prevention structure towards the surface of the insulating cover.

[0015] According to some embodiments of the present disclosure, 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 frame structure.

[0016] According to some embodiments of the present disclosure, the frame structure is an integrally formed structure.

[0017] According to some embodiments of the present disclosure, the frame structure comprises a first sub-portion and a second sub-portion, the first sub-portion is fixedly connected with the second sub-portion to form the frame structure.

[0018] According to some embodiments of the present disclosure, the frame structure comprises a bendable plate structure, one end of the bendable plate structure is provided with a limiting portion, the other end of the bendable plate structure is provided with a limiting matching portion, and the limiting matching portion is matched with the limiting portion to form the frame structure.

[0019] According to some embodiments of the present disclosure, the relay further comprises a permanent magnet, and the permanent magnet is located between the frame structure and the circumferential side wall of the insulating cover.

[0020] According to some embodiments of the present disclosure, the frame structure is provided with a positioning protrusion for positioning the permanent magnet.

[0021] According to some embodiments of the present disclosure, the frame structure is provided with a reinforcing rib at the bending part.

[0022] According to some embodiments of the present disclosure, the relay further comprises a housing located outside the frame structure.

[0023] According to some embodiments of the present disclosure, the insulating cover is made of ceramic; the relay further comprises a yoke plate and a frame sheet, the yoke plate is connected to the insulating cover through the frame sheet; the frame structure is located on the yoke plate, or the frame structure is located on the frame sheet.

[0024] According to some embodiments of the present disclosure, the frame structure is provided with a reinforcing rib at the bending part.

[0025] According to some embodiments of the present disclosure, the frame structure is located outside the insulating cover.

[0026] According to some embodiments of the present disclosure, the frame structure comprises a rigid frame structure forming part of the housing of the relay.

[0027] According to some embodiments of the present disclosure, at least part of the frame structure can be elastically deformed to contact part of the outer surface of the circumferential side wall of the insulating cover and apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover.

[0028] According to some embodiments of the present disclosure, the frame structure comprises a rigid frame structure made of insulating material, and the rigid frame structure is located inside the insulating cover.

[0029] The inventor 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 ceramic insulating cover, the strength can only be improved to a certain extent. In the case of increasing user requirements for short-circuit current, the cavity of the insulating cover cannot meet the requirements.

[0030] Based on this, one embodiment of the above invention has at least the following advantages or beneficial effects:

[0031] (1) The relay provided by the embodiment of the present disclosure, one end of the plurality of static contacts and the moving contact are accommodated in the insulating cover, a filling layer is arranged between the frame structure and the insulating cover, the filling layer fills the space formed between the circumferential sidewall of the frame structure and the insulating cover, the frame structure is indirectly in contact with the circumferential sidewall of the insulating cover through the filling layer, the filling layer is used for absorbing the dimensional tolerance of the insulating cover and the frame structure, filling the gap between the insulating cover and the frame structure, the filling layer and the frame structure jointly form a protective structure with higher strength, and the protective structure can be completely attached to the circumferential sidewall of the insulating cover, effectively protecting the insulating cover, thereby improving the safety performance.

[0032] (2) The relay provided by the embodiment of the present disclosure further comprises a leakage prevention structure, the leakage prevention structure is used for plugging the bottom of the filling space. In the process of filling the colloid, it is ensured that the colloid does not flow to the outside, but is gathered in the filling space, so that the tolerance can be better absorbed after solidification, and the gap can be filled.

[0033] (3) The relay provided by the embodiment of the present disclosure, at least part of the frame structure can be elastically deformed to apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover. In the process of assembling the relay, at least part of the elastic frame structure is elastically deformed and in contact with part of the circumferential sidewall 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 impact force outward, which is conducive to improving the safety performance, while limiting the outward expansion of the insulating cover. In this case, the filling layer and the elastic frame structure jointly form a protective structure with higher strength, and the pre-pressure still exists. When the contact system is in a short-circuit moment and a fierce arc burns, the temperature rises instantaneously, the air pressure in the ceramic cavity rises instantaneously, when the huge pressure borne by the insulating cover is transmitted to the elastic frame structure, the elastic frame structure can provide pressure to the inner cavity of the insulating cover from the four sides of the insulating cover, effectively protecting the insulating cover, and further improving the safety performance. BRIEF DESCRIPTION OF DRAWINGS

[0034] FIG. 1 shows an exploded view of the relay provided by the embodiment of the present disclosure (the filling layer is not shown);

[0035] FIG. 2 shows a structural schematic view of the relay provided by the embodiment of the present disclosure;

[0036] FIG. 3 shows a structural schematic view of the rigid frame structure in the embodiment of the present disclosure (showing a permanent magnet);

[0037] FIG. 4 shows a structural schematic view of the rigid frame structure in the relay provided by the embodiment of the present disclosure;

[0038] FIG. 5 shows a structural schematic view of the rigid frame structure in the relay provided by the embodiment of the present disclosure;

[0039] Fig. 6 shows a structural diagram of a rigid frame structure in a relay according to an embodiment of the present disclosure;

[0040] Fig. 7 shows a second structural diagram of a relay according to an embodiment of the present disclosure;

[0041] Fig. 8 shows an exploded view of the relay shown in Fig. 7;

[0042] Fig. 9 shows a top view of the relay shown in Fig. 7;

[0043] Fig. 10 shows a sectional view along line B-B of Fig. 9 (filling layer not shown);

[0044] Fig. 11 shows a sectional view along line B-B of Fig. 9;

[0045] Fig. 12 shows a third structural diagram of a relay according to an embodiment of the present disclosure;

[0046] Fig. 13 shows a fourth structural diagram of a relay according to an embodiment of the present disclosure;

[0047] Fig. 14 shows a fifth structural diagram of a relay according to an embodiment of the present disclosure (inverted state);

[0048] Fig. 15 shows a sixth structural diagram of a relay according to an embodiment of the present disclosure;

[0049] Fig. 16 shows a seventh structural diagram of a relay according to an embodiment of the present disclosure;

[0050] Fig. 17 shows an eighth structural diagram of a relay according to an embodiment of the present disclosure;

[0051] Fig. 18 shows a ninth structural diagram of a relay according to an embodiment of the present disclosure;

[0052] Fig. 19 shows a ninth structural diagram of a relay according to an embodiment of the present disclosure (showing a filling layer);

[0053] Fig. 20 shows a tenth structural diagram of a relay according to an embodiment of the present disclosure;

[0054] Fig. 21 shows an internal structural diagram of the relay shown in Fig. 20;

[0055] Fig. 22 shows an exploded view of the relay shown in Fig. 20;

[0056] Fig. 23 shows a structural diagram of an elastic frame structure in a relay according to an embodiment of the present disclosure;

[0057] Fig. 24 shows a top view of an elastic frame structure cooperating with an insulating cover according to an embodiment of the present disclosure;

[0058] Fig. 25 shows another structure diagram of the elastic frame structure in the relay according to an embodiment of the present disclosure;

[0059] Fig. 26 shows another structure diagram of the elastic frame structure in the relay according to an embodiment of the present disclosure (showing the permanent magnet);

[0060] Fig. 27 shows a eleventh structure diagram of the relay according to an embodiment of the present disclosure.

[0061] The following is the description of the reference signs: 10 - insulating cover; 11 - first side wall; 12 - second side wall; 13 - top plate; 14 - outward flange; 20 - static contact; 31, 31' - first sub-housing; 32, 32' - second sub-housing; 40 - yoke plate; 50 - frame piece; 60 - coil holder; 70 - moving contact piece; 100 - elastic frame structure; 101 - first side edge part; 102 - second side edge part; 103 - sub-frame; 104 - third side edge part; 105 - reinforcing rib; 200 - rigid frame structure; 201 - first sub-rigid part; 2011 - first plate part; 2012 - second plate part; 2013 - third plate part; 2014 - fourth plate part; 2015 - fifth plate part; 202 - second sub-rigid part; 203 - dovetail groove; 204 - trapezoidal protrusion; 205' - glue layer; 2051 - glue body; 2052 - reinforcing structure; 206 - sleeve; 2061 - sealing groove; 207 - sealing ring; 208 - inward flange; 209 - flared portion; 210 - permanent magnet; 211 - positioning protrusion part. DETAILED DESCRIPTION

[0062] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, however, 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 example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus description of the same will be omitted.

[0063] Referring to Figs. 1-27, the present embodiment provides a relay, which includes an insulating cover 10 and a frame structure, a contact structure including a plurality of static contacts 20 and a moving contact piece 70, one end of the plurality of static contacts 20 and the moving contact piece 70 are accommodated in the insulating cover 10, and two ends of the moving contact piece 70 can be in contact with or disconnected from the static contacts 20; a filling layer is arranged between the frame structure and the insulating cover 10, and the frame structure indirectly contacts the circumferential side wall of the insulating cover through the filling layer.

[0064] The relay provided by the embodiment has one end of the plurality of static contacts and the movable contact piece accommodated in the insulating cover, the filler layer is arranged between the frame structure and the insulating cover, the filler layer fills the space formed between the circumferential sidewall of the frame structure and the insulating cover, the frame structure indirectly contacts the circumferential sidewall of the insulating cover through the filler layer, the filler layer is used for absorbing the dimensional tolerance of the insulating cover and the frame structure, filling the gap between the insulating cover and the frame structure, the filler layer and the frame structure jointly form a higher-strength protection structure, and the protection structure can be completely attached to the circumferential sidewall of the insulating cover, effectively protecting the insulating cover, thereby further improving the safety performance.

[0065] Exemplarily, 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. 2), a width direction (indicated by the arrow direction D2 in FIG. 2), and a height direction (indicated by the arrow direction D3 in FIG. 2), and the insulating cover 10 includes a top plate 13 and a circumferential sidewall arranged around the edge of the top plate 13, the circumferential sidewall includes two first sidewalls 11 and two second sidewalls 12, the two first sidewalls 11 are oppositely arranged along the width direction of the insulating cover 10, and the two second sidewalls 12 are oppositely arranged along the length direction of the insulating cover 10.

[0066] Exemplarily, the number of static contacts 20 is two, the top plate 13 of the insulating cover 10 is provided with two mounting holes, the two mounting holes are arranged at intervals along the length direction of the insulating cover 10, and one static contact 20 is mounted in each mounting hole, one of the static contacts 20 serves as a terminal for current inflow, and the other static contact 20 serves as a terminal for current outflow. One end of the movable contact piece 70 contacts or is disconnected from one of the static contacts 20, and the other end of the movable contact piece 70 contacts or is disconnected from the other static contact 20. Of course, the number of static contacts can also be greater than two, part of the static contacts contact or are disconnected from one end of the movable contact piece, and the other part of the static contacts contact or are disconnected from the other end of the movable contact piece.

[0067] It should be understood that, in the view of FIG. 1, the top plate of the insulating cover 10 is located above the circumferential sidewall, and in other views, the top plate can also be located below or on one side of the circumferential sidewall.

[0068] In the embodiment, the height of the frame structure 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. Exemplarily, the height of the frame structure is substantially equal to the height of the insulating cover 10.

[0069] In some embodiments, referring to FIG. 2, the frame structure extends along the height direction of the insulating cover 10 from one end to the other end of the insulating cover 10. In this way, the contact area between the frame structure and the circumferential side wall of the insulating cover 10 can be increased, so that the insulating cover 10 can be protected more effectively, and the safety performance can be further improved.

[0070] In one embodiment, referring to FIG. 1 and FIG. 17, the relay further comprises a yoke plate 40 and a frame piece 50, and the yoke plate 40 is connected to the end of the insulating cover 10 away from the top plate 13 through the frame piece 50.

[0071] In some embodiments, referring to FIG. 17, the frame structure is located on the yoke plate 40.

[0072] In other embodiments, referring to FIG. 18, the frame structure can also be located on the frame piece 50.

[0073] Referring to FIG. 1, the relay further comprises a coil holder 60, and the coil holder 60 is located on the side of the yoke plate 40 away from the frame structure, and a coil is wound on the coil holder.

[0074] 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 piece 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 iron core, a dynamic iron core and a push rod, the static iron core is fixedly arranged in the second inner cavity; the dynamic iron 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 iron core, and the other end of the push rod is connected to the dynamic contact piece; the dynamic iron core can be attracted to or separated from the static iron core to make the dynamic contact on the dynamic contact piece contact or disconnect with the static contact on the static contact head.

[0075] For example, in the unpowered state, the dynamic iron core is separated from the static iron core, and the dynamic contact on the dynamic contact piece is disconnected with the static contact on the static contact head; when the coil is powered, the dynamic iron core is attracted to the static iron core, and the dynamic contact on the dynamic contact piece is contacted with the static contact on the static contact head.

[0076] In one embodiment, the number of frame structures can be one or multiple, and multiple frame structures are arranged in sequence, that is, multiple frame structures are arranged along the direction from the inner cavity of the insulating cover 10 to the outside.

[0077] In one possible design, the frame structure can be a rigid frame structure 200. The rigid frame structure 200 is located on the outside of the insulating cover 10.

[0078] In some embodiments, referring to FIG. 11, the filling layer is a glue 2051. The glue 2051 is filled in the space formed between the rigid frame structure 200 and the circumferential side wall of the insulating cover 10, and can form an integrated structure with the rigid frame structure 200 after the glue 2051 is solidified, further enhancing the safety performance.

[0079] In other embodiments, referring to FIGS. 20-22, the filling layer includes a reinforcing structure 2052 and a glue 2051. The reinforcing structure 2052 is arranged between the circumferential side wall of the insulating cover 10 and the frame structure, and the glue 2051 is filled in the filling space formed between the circumferential side wall of the insulating cover 10 and the frame structure.

[0080] For example, referring to FIG. 22, the reinforcing structure 2052 can be a reinforcing bar. The reinforcing bar is wound outside the insulating cover 10, and the rigid frame structure 200 is located outside the reinforcing bar. The glue 2051 is filled in the filling space formed between the circumferential side wall of the insulating cover 10 and the frame structure. After the glue 2051 is solidified, it can form an integrated structure with the reinforcing bar and the rigid frame structure 200, thereby further enhancing the safety performance.

[0081] It should be noted that the reinforcing structure 2052 is not limited to a reinforcing bar. As long as it has a certain rigidity and can play a protective role, it can be used. The glue 2051 can be an epoxy resin glue or other solidifying agents that can flow and solidify.

[0082] In one embodiment, a filling space is formed between the frame structure and the circumferential side wall of the insulating cover, and the filling layer is located in the filling space. The relay further includes a leakage prevention structure for sealing the bottom of the filling space. During the filling of the glue, the glue is prevented from flowing to the outside and is aggregated in the filling space, so as to better absorb the tolerance and fill the gaps after solidification.

[0083] In one embodiment, referring to FIGS. 7-11, the leakage prevention structure includes a sleeve 206 with two open ends. The sleeve 206 is sleeved outside the insulating cover. One end of the sleeve is connected with the yoke plate 40 of the relay, and the other end of the sleeve is provided with a sealing groove 2061. The frame structure is arranged in the sealing groove 2061, and the groove bottom of the sealing groove is used to seal the bottom of the filling space.

[0084] In some embodiments, the end of the rigid frame structure 200 away from the sleeve 206 is provided with a flared portion 209, so as to facilitate the glue filling from the flared portion 209 into the filling space.

[0085] In this embodiment, FIG. 10 exemplarily shows the movable contact 70, which is in a disconnected state with the static contact in FIG. 10.

[0086] In one embodiment, referring to FIG. 12, the leakage-proof structure comprises a sealing ring 207, which is sleeved on the outside of the insulating cover 10, and the frame structure is arranged on the sealing ring 207.

[0087] In one embodiment, the leakage-proof structure is an inward flange 208 arranged at one end of the frame structure.

[0088] In some embodiments, referring to FIG. 13, the inward flange 208 is arranged at one end of the frame structure away from the top plate 13 of the insulating cover 10.

[0089] In other embodiments, referring to FIG. 14, the inward flange 208 can also be arranged at one end of the frame structure close to the top plate 13 of the insulating cover 10. At this time, during the glue filling, the relay can be inverted, and the inward flange 208 can block the bottom of the filling space.

[0090] In one embodiment, referring to FIG. 15, the insulating cover 10 is provided with an outward flange 14, and the frame structure is arranged on the outward flange 14, and the outward flange 14 forms a leakage-proof structure towards the surface of the top plate of the insulating cover.

[0091] In one embodiment, referring to FIG. 16, when the insulating cover 10 is provided with an outward flange 14, the end of the frame structure away from the top plate of the insulating cover can also be provided with an inward flange 208. In this way, the contact area of the inward flange 208 and the outward flange 14 can be increased, and during the glue filling process, the frame structure can be prevented from being displaced to cause the skew phenomenon, and further prevent glue leakage.

[0092] Referring to FIG. 17, when the frame structure is in contact with the yoke plate 40, the surface of the yoke plate 40 towards the insulating cover 10 can play a role in blocking the bottom of the filling space.

[0093] Referring to FIG. 18, when the frame structure is in contact with the frame piece 50, the surface of the frame piece 50 towards the insulating cover 10 can play a role in blocking the bottom of the filling space. Referring to FIG. 19, the filling space is filled with glue.

[0094] In some embodiments, referring to FIG. 1, the frame structure is a one-piece rigid frame structure 200, which has a circumferentially closed protection space, and the insulating cover 10 is located in the protection space. The one-piece rigid frame structure 200 has higher structural strength. When the huge pressure borne by the insulating cover 10 is transmitted to the rigid frame structure, the one-piece rigid frame structure 200 can apply more uniform and stable pressure to the inner cavity of the insulating cover 10 from all around, effectively protecting the insulating cover 10 and improving the safety performance.

[0095] In other embodiments, referring to FIG. 4 and FIG. 5, the rigid frame structure 200 comprises a first sub-portion and a second sub-portion, wherein the first sub-portion is named as a first sub-rigid portion 201, and the second sub-portion is named as a second sub-rigid portion 202, the first sub-rigid portion 201 is fixedly connected with the second sub-rigid portion 202 to form the rigid frame structure 200.

[0096] For example, referring to FIG. 4, the first sub-rigid portion 201 comprises 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, 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 in a plate shape, 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.

[0097] For example, referring to FIG. 4, the second sub-rigid portion 202 can be welded with the first sub-rigid portion 201, and referring to FIG. 5, the second sub-rigid portion 202 can also be riveted with the first sub-rigid portion 201.

[0098] In other embodiments, the frame structure comprises a bendable plate structure, one end of the bendable plate structure is provided with a limiting portion, the other end of the bendable plate structure is provided with a limiting matching portion, the limiting matching portion is matched with the limiting portion to form the frame structure.

[0099] For example, referring to FIG. 6, the limiting portion can be a dovetail groove 203, and the limiting matching portion can be a trapezoidal protrusion 204, the trapezoidal protrusion 204 is matched with the dovetail groove 203. In assembly, the trapezoidal protrusion 204 is limited in the dovetail groove 203 to realize self-locking, thereby effectively preventing the rigid frame structure 200 from being opened.

[0100] The material of the rigid frame structure 200 can be metal or non-metal, such as plastic.

[0101] For example, the material of the rigid frame structure 200 can be a magnetic material, referring to FIG. 3 and FIG. 6, the relay further comprises a permanent magnet 210, the permanent magnet 210 is located between the rigid frame structure 200 and the circumferential side wall of the insulating cover 10.

[0102] For example, the number of permanent magnets 210 is two, and the two permanent magnets 210 are oppositely arranged on both sides of the insulating cover 10 along the length direction of the insulating cover 10 to form an arc-blowing magnetic field, so as to realize the arc-extinguishing function.

[0103] Of course, the rigid frame structure shown in FIGS. 4 and 5 can also be provided with permanent magnets.

[0104] In one embodiment, 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.

[0105] 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 glue 2051.

[0106] Referring to FIG. 3, the adjacent two side walls of the rigid frame structure form a corner, and the corner is provided with a reinforcing rib 105 to increase the strength of the rigid frame structure 200. For example, the reinforcing rib 105 is formed by inward stamping to increase the structural strength at the corner.

[0107] In other embodiments, the rigid frame structure can also be located inside the insulating cover, and the filling layer is located between the outer surface of the rigid frame structure and the inner surface of the insulating cover. At this time, the material of the rigid frame structure is an insulating material, such as plastic.

[0108] In another possible design, referring to FIGS. 23 to 26, the frame structure can also be an elastic frame structure 100. When the frame structure is an elastic frame structure, at least part of the elastic frame structure can be elastically deformed to contact part of the outer surface of the circumferential side wall of the insulating cover and apply a pre-pressure to the insulating cover towards the inner cavity of the insulating cover. During the assembly of the relay, at least part of the elastic frame structure is elastically deformed to contact 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. The pre-pressure can offset part of the outward impact force, which is beneficial to improve the safety performance and limit the outward expansion of the insulating cover 10.

[0109] In this case, the filling layer and the elastic frame structure together form a stronger protective structure, and the pre-pressure still exists. When the contact system is subjected to a violent arc at the moment of short circuit, the temperature rises instantaneously, and the air pressure in the inner cavity of the insulating cover rises instantaneously. When the huge pressure borne by the insulating cover 10 is transmitted to the elastic frame structure, the elastic frame structure can provide pressure to the inner cavity of the insulating cover 10 from the four sides of the insulating cover 10, effectively protecting the insulating cover 10 and improving the safety performance.

[0110] The elastic frame structure 100 comprises two opposite first side edge portions 101, which are respectively arranged at two sides of the insulation cover 10 to apply a pre-pressure to the insulation cover 10 towards the inner cavity of the insulation cover 10.

[0111] For example, as shown in FIG. 24, the two first side edge portions 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 insulation cover 10.

[0112] It should be noted that the elastic frame structure can also comprise two first side edge portions which are not arranged opposite to each other.

[0113] The elastic frame structure 100 further comprises two opposite second side edge portions 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 insulation cover 10.

[0114] As shown in FIG. 24, the middle position of the first side edge portion 101 is elastically deformed towards the inner cavity of the insulation cover 10, so that the middle position of the first side edge portion 101 abuts against the first side wall 11 of the insulation cover 10, and a gap is arranged between the two ends of the first side edge portion 101 and the first side wall 11.

[0115] Correspondingly, the middle position of the second side edge portion 102 is elastically deformed towards the inner cavity of the insulation cover 10, so that the middle position of the second side edge portion 102 abuts against the second side wall 12 of the insulation cover 10, and a gap is arranged between the two ends of the second side edge portion 102 and the second side wall 12 along the length direction of the insulation cover 10. The arrow direction in FIG. 24 represents the direction of the pre-pressure.

[0116] For example, the elastic frame structure 100 can be an integrally formed structure, which has a protective space closed in the circumferential direction, and the insulation cover 10 is located in the protective space. When a great pressure borne by the insulation cover 10 is transmitted to the elastic frame structure 100, the integrally formed elastic frame structure 100 can apply a more uniform and stable pre-pressure to the inner cavity of the insulation cover 10 from all around, effectively protect the insulation cover 10, and improve the safety performance.

[0117] Of course, as shown in FIG. 23, the elastic frame structure 100 can also be formed by bending the ends of the first side edge portion 101 and the second side edge portion 102 to form a folded edge, and the two ends of the folded edge are hooked together to form a structure, and the folded edge can be welded to further increase the structural strength.

[0118] In some embodiments, referring to FIG. 25, the elastic frame structure 100 includes two opposite first side portions 101, which are respectively located at two sides of the insulation cover 10 to apply a pre-pressure to the insulation cover 10 towards the inner cavity of the insulation cover 10; the elastic frame structure 100 further includes two opposite third side portions 104, which are connected between the two first side portions 101 and contact the second side wall 12 of the insulation cover 10.

[0119] The two first side portions 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 insulation cover 10; meanwhile, the two third side portions 104 are rigid portions, which are respectively arranged outside the second side wall 12 to enhance the safety performance of the second side wall 12 and thus the overall safety performance.

[0120] For example, the third side portion 104 is integrally formed with the first side portion 101. Referring to FIG. 26, a corner is formed between the first side portion 101 and the third side portion 104, and a reinforcing rib 105 is arranged at the corner to increase the strength of the elastic frame structure. For example, the reinforcing rib 105 is formed by inward stamping to increase the structural strength at the corner.

[0121] Referring to FIG. 26, a permanent magnet 210 is arranged between the third side portion 104 and the second side wall 12, and the third side portion contacts the second side wall through the permanent magnet.

[0122] In some embodiments, the elastic frame structure can also include a first sub-portion and a second sub-portion, which are fixedly connected to form the elastic frame structure.

[0123] It should be understood that the structure and connection manner of the first sub-portion and the second sub-portion in the elastic frame structure are basically the same as those of the first sub-rigid portion and the second sub-rigid portion in the rigid frame structure, which will not be described here again.

[0124] In one embodiment, the relay further includes a housing, and the insulation cover 10 and the frame structure are both mounted inside the housing. At this time, the housing can further play a protective role.

[0125] For example, referring to FIG. 1, the housing includes a first sub-housing 31 and a second sub-housing 32, which are fixedly connected to encapsulate the insulation cover 10 and the frame structure inside the housing.

[0126] In other embodiments, when the frame structure comprises a rigid frame structure, and the rigid frame structure is located outside the insulating cover 10, the rigid frame structure can form part of the shell of the relay. Referring to Fig. 27, the shell extends downward from the rigid frame structure at the end close to the bottom of the insulating cover to wrap the yoke plate, the frame piece and the coil holder inside.

[0127] For example, the shell can comprise 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 stationary contact 20 passes out of the through hole; the rigid frame structure 200 is part of the second sub-shell 32'.

[0128] For example, when the rigid frame structure 200 is part of the shell of the relay, the material of the rigid frame structure can be plastic, and the inner surface of the rigid frame structure 200 is provided with a glue layer 205' to enhance the fixing effect. Part of the glue layer can be the aforementioned filling layer, of course, the aforementioned filling layer can also be directly used as the glue layer.

[0129] Finally, it should be pointed out that: it can be understood that the various embodiments / embodiments provided by the disclosure can be combined with each other without contradiction, which will not be illustrated one by one here.

[0130] In the embodiments of the application, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing", "contacting" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integral connection; "connected" can be directly connected, or indirectly connected through an intermediate medium; "contacting" can be direct contact or indirect contact. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0131] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the embodiments of the application and simplifying the description, and therefore, cannot be understood as indicating or implying that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the embodiments of the application.

[0132] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", etc. means that the particular feature, structure, material or characteristic being described in connection with the embodiment or example is included in at least one embodiment or example of the application. The illustrative examples set forth in the specification are not meant to be limiting in terms of the scope of the application, and generally describe only some of the embodiments or examples. Further, descriptions of "one embodiment", "some embodiments", "certain embodiments", etc. do not necessarily refer to the same embodiment or example. Moreover, descriptions of certain features, structures, materials or characteristics can be combined in any one or more embodiments or examples. For the purposes of the present application, the terms "approximately" and "substantially" mean about ±10% of the value of the term modified by the term.

[0133] The preferred embodiments of the application are thus described. Changes and modifications can be made to the application in light of the above descriptions. The detailed description is to be construed as exemplary only and does not limit the scope of the application. Equivalent changes and modifications can be carried out by those with ordinary skill in the art, per the spirit of the application.

Claims

1. A relay characterized by comprising: The relay comprises a contact structure, an insulating cover and a frame structure, the contact structure comprises a plurality of static contacts and a dynamic contact, one end of the plurality of static contacts and the dynamic contact are accommodated in the insulating cover, and two ends of the dynamic contact can be in contact with or disconnected from the static contacts; a filling layer is arranged between the frame structure and the circumferential side wall of the insulating cover, and the frame structure is indirectly in contact with the circumferential side wall of the insulating cover through the filling layer.

2. The relay according to claim 1, characterized in that A filling space is formed between the frame structure and the circumferential side wall of the insulating cover, and the filling layer is located in the filling space. The relay further comprises a leakage prevention structure for plugging the bottom of the filling space.

3. The relay according to claim 2, characterized in that The leakage prevention structure comprises a sleeve with open ends, the sleeve is sleeved on the outside of the insulating cover, one end of the sleeve is connected with a yoke plate of the relay, the other end of the sleeve is provided with a sealing groove, the frame structure is arranged in the sealing groove, and the groove bottom of the sealing groove is used for plugging the bottom of the filling space.

4. The relay according to claim 3, characterized in that The frame structure is provided with a flared end away from the sleeve.

5. The relay of claim 2, wherein The leakage prevention structure comprises a sealing ring, the sealing ring is sleeved on the outside of the insulating cover, and the frame structure is arranged on the sealing ring.

6. The relay of claim 2, wherein The leakage prevention structure is an inward flange arranged at one end of the frame structure.

7. The relay of claim 2, wherein The insulating cover is provided with an outward flange, the frame structure is arranged on the outward flange, and the outward flange forms the leakage prevention structure towards the surface of the top of the insulating cover.

8. The relay of claim 2, wherein The relay further comprises a yoke plate and a frame piece, the yoke plate is connected to the insulating cover through the frame piece, the frame structure is located on the yoke plate, the yoke plate forms the leakage prevention structure towards the surface of the insulating cover, or the frame structure is located on the frame piece, and the frame piece forms the leakage prevention structure towards the surface of the insulating cover.

9. The relay according to any one of claims 1 to 8, characterized in that 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 frame structure.

10. The relay according to any one of claims 1 to 8, characterized in that The frame structure is an integrally formed structure.

11. The relay according to any one of claims 1 to 8, characterized in that The frame structure comprises a first sub-portion and a second sub-portion, the first sub-portion is fixedly connected with the second sub-portion to form the frame structure.

12. The relay according to any one of claims 1 to 8, characterized in that The frame structure comprises a bendable plate structure, one end of the bendable plate structure is provided with a limiting portion, the other end of the bendable plate structure is provided with a limiting matching portion, and the limiting matching portion is matched with the limiting portion to form the frame structure.

13. The relay according to any one of claims 1 to 8, characterized in that A permanent magnet is further included, and the permanent magnet is located between the frame structure and the circumferential side wall of the insulating cover.

14. The relay of claim 13, wherein, The frame structure is provided with a positioning protruding portion for positioning the permanent magnet.

15. The relay according to any one of claims 1 to 8, characterized in that The frame structure is provided with a reinforcing rib at a bending portion.

16. The relay according to any one of claims 1 to 8, characterized in that A shell is further included, and the shell is located outside the frame structure.

17. The relay according to any one of claims 1 to 7, characterized in that The insulating cover is made of ceramic; the relay further comprises a yoke plate and a frame piece, the yoke plate is connected to the insulating cover through the frame piece, the frame structure is located on the yoke plate, or the frame structure is located on the frame piece.

18. The relay according to any one of claims 1 to 8, characterized in that The number of the frame structures is multiple, and the multiple frame structures are sequentially arranged along the direction from the inner cavity of the insulating cover to the outside.

19. The relay according to any one of claims 1 to 8, characterized in that The frame structure is located outside the insulating cover.

20. The relay of claim 19, wherein, The frame structure comprises a rigid frame structure which forms part of a housing of the relay.

21. The relay of claim 19, wherein, At least part of the frame structure is elastically deformable to contact part of an outer surface of a circumferential side wall of the insulating cover and to apply a pre-pressure to the insulating cover towards an inner cavity of the insulating cover.

22. The relay according to any one of claims 1 to 8, characterized in that The frame structure comprises a rigid frame structure which is made of an insulating material and which is located inside the insulating cover.

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