RELAY

Abstract

The invention relates to a relay comprising fixed contact terminals, a movable spring assembly, a push rod assembly, a first anti-rotation assembly, and a second anti-rotation assembly. The movable spring assembly comprises a movable spring strip, the two ends of which, in the first direction, are used to contact or separate from the pair of fixed contact terminals, respectively; the first direction is the arrangement of the pair of fixed contact terminals, and the direction of movement of the movable spring strip is defined as the second direction. The movable spring assembly has its first and second side faces arranged opposite each other in a third direction perpendicular to the first and second directions. The push rod assembly comprises a contact holder with its first and second side walls arranged opposite each other in a third direction, the first side wall corresponding to the first side face, and the second side wall corresponding to the second side face.The first anti-rotation assembly consists of the first and second magnets, with opposite poles of the first and second magnets being of the same type; and the second anti-rotation assembly consists of the third and fourth magnets, with opposite poles of the third and fourth magnets being of the same type.

Description

relay

[0001] This disclosure claims priority to Chinese patent application No. 202311189290.4 filed on September 14, 2023, the entire contents of which are incorporated herein by reference. Technical Field

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

[0003] A relay is an electronic control device with a control circuit (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger one. Therefore, it plays a role in automatic regulation, safety protection, and circuit switching.

[0004] A high-voltage DC relay is a type of relay. The prior art high-voltage DC relay includes a pair of static contact leads, a dynamic assembly, a coil unit, and a magnetic circuit. The dynamic assembly includes a dynamic spring assembly, a push rod assembly, and an elastic assembly. The dynamic spring assembly is mounted on the push rod assembly via the elastic assembly. The magnetic circuit includes a static iron core and a dynamic iron core. The static iron core is fixed in the relay, and the dynamic iron core is connected to the push rod assembly. When the coil unit is energized, the static iron core generates a magnetic attraction force and attracts the dynamic iron core to move, thereby driving the push rod assembly and the dynamic spring assembly to move together to achieve contact closure.

[0005] However, during the operation of the relay, the movable spring assembly is prone to rotate relative to the push rod around the axis of the push rod, causing the movable spring assembly to rub against the contact bracket of the push rod assembly and generate a large metal noise; further, with the friction loss between the movable spring assembly and the contact bracket, the deflection angle of the movable spring assembly will become larger and larger, thereby affecting the contact position of the movable spring assembly and the static contact lead end, causing unstable contact resistance; in addition, metal particles are easily generated after the movable spring assembly and the contact bracket rub against each other. After the metal particles fall on the contact surface of the contact, it is easy to cause the contact resistance to increase or even cause the relay to fail to conduct.

[0006] Summary of the Invention

[0007] The embodiment of the present application provides a relay to solve the problem in the prior art that the dynamic spring assembly is prone to rotation.

[0008] The relay of the embodiment of the present application includes:

[0009] A pair of static contact terminals;

[0010] A dynamic spring assembly, comprising a dynamic spring piece, wherein both ends of the dynamic spring piece along a first direction are respectively configured to contact or separate from a pair of static contact lead terminals; the first direction is the arrangement direction of the pair of static contact lead terminals; the dynamic spring assembly has a first side surface and a second side surface arranged opposite to each other along a third direction; wherein the movement direction of the dynamic spring piece is defined as a second direction, and the first direction, the second direction, and the third direction are perpendicular to each other;

[0011] The push rod assembly includes a contact support; the contact support has a first side wall and a second side wall arranged opposite to each other along the third direction, the first side wall corresponds to the first side surface, and the second side wall corresponds to the second side surface;

[0012] a first anti-rotation assembly comprising a first magnet connected to the first side surface and a second magnet connected to the first side wall, wherein the facing poles of the first magnet and the second magnet are the same poles; and

[0013] The second anti-rotation component includes a third magnet connected to the second side surface and a fourth magnet connected to the second side wall, wherein the facing poles of the third magnet and the fourth magnet are the same poles.

[0014] According to some embodiments of the present application, the first side wall has a first inner side surface facing the dynamic spring assembly and a first outer side surface disposed opposite to the first inner side surface;

[0015] The second magnet is connected to the first inner side surface or the first outer side surface.

[0016] According to some embodiments of the present application, the second side wall has a second inner side surface facing the dynamic spring assembly and a second outer side surface disposed opposite to the second inner side surface;

[0017] The fourth magnet is connected to the second inner side surface or the second outer side surface.

[0018] According to some embodiments of the present application, the first magnet, the second magnet, the third magnet and the fourth magnet are permanent magnets.

[0019] According to some embodiments of the present application, the first magnet, the second magnet, the third magnet, and the fourth magnet are in the shape of plates, and have the same thickness.

[0020] According to some embodiments of the present application, the push rod assembly further includes a rod portion and a base connected to one axial end of the rod portion;

[0021] The contact bracket is connected to the base, and the contact bracket and the base form a space for accommodating the dynamic spring assembly.

[0022] According to some embodiments of the present application, the contact bracket further includes a bottom wall, wherein both ends of the bottom wall along the third direction are integrally connected to one end of the first side wall and one end of the second side wall respectively; the contact bracket, the rod portion, and the base are connected by injection molding, and the base covers the bottom wall and one end of the first side wall and the second side wall;

[0023] The push rod assembly further includes a stopper connected to the other end of the first side wall and the second side wall, and the stopper is provided on a side of the movable spring assembly facing the static contact lead-out end.

[0024] According to some embodiments of the present application, the contact support further includes a top wall, and both ends of the top wall along the third direction are integrally connected to one end of the first side wall and one end of the second side wall respectively;

[0025] The other ends of the first side wall and the second side wall are respectively engaged with the base.

[0026] According to some embodiments of the present application, the relay further includes a first magnetic conductor, which is arranged on a side of the movable reed facing the static contact lead-out end.

[0027] According to some embodiments of the present application, the dynamic spring assembly further includes a second magnetic conductor, which is fixedly connected to the side of the dynamic spring piece facing away from the static contact lead-out end; the second magnetic conductor is used to form a magnetic circuit with the first magnetic conductor.

[0028] According to some embodiments of the present application, the relay further includes:

[0029] The elastic component is connected to the dynamic spring component and the push rod component, and the elastic component is used to provide contact pressure.

[0030] One embodiment of the above application has at least the following advantages or beneficial effects:

[0031] In the relay of the present application, the repulsive force generated between the first and second magnets, and between the third and fourth magnets, exerts repulsive force on both sides of the dynamic spring assembly in the third direction. This allows the dynamic spring assembly to remain between the first and second side walls without rotating relative to the push rod assembly, thus preventing metallic noise from friction between the dynamic spring assembly and the first and second side walls. Furthermore, this ensures consistent contact position between the dynamic spring assembly and the static contact lead-out terminal, guaranteeing stable contact resistance. Furthermore, because the dynamic spring assembly does not rotate relative to the push rod assembly, the risk of metal particles generated by friction between the dynamic spring assembly and the contact support is significantly reduced, ensuring the reliability of the relay product. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.

[0033] FIG1 is an exploded schematic diagram showing a relay according to an exemplary embodiment.

[0034] FIG. 2 is a schematic top view of a sealing unit according to an exemplary embodiment.

[0035] FIG3 is a cross-sectional view taken along line AA in FIG2 , wherein the movable spring assembly is not in contact with the static contact lead-out terminal.

[0036] FIG4 is a cross-sectional view taken along the BB section line in FIG2 , wherein the movable spring assembly is not in contact with the static contact lead-out terminal.

[0037] FIG5 is a cross-sectional view taken along line AA in FIG2 , wherein the movable spring assembly is in contact with the static contact lead-out terminal.

[0038] FIG6 is a cross-sectional view taken along line BB in FIG2 , wherein the movable spring assembly is in contact with the static contact lead-out terminal.

[0039] FIG. 7 is a cross-sectional view of a moving assembly according to another exemplary embodiment.

[0040] FIG8 is a cross-sectional view of a moving assembly according to yet another exemplary embodiment.

[0041] FIG. 9 is a cross-sectional view of a moving assembly according to yet another exemplary embodiment.

[0042] The description of the accompanying drawings is as follows:

[0043] In the figure: 1. relay; 10. housing; 11. first housing; 11a. exposure hole; 12. second housing; 20. coil unit; 21. coil frame; 22. coil; 30. arc extinguishing unit; 31. arc extinguishing magnet; 32. yoke clamp; 40. sealing unit; 1000. contact container; 1001. contact chamber; 1002. first through hole; 1100. insulation cover; 1110. ceramic cover; 1120. frame; 1200. yoke plate; 1210. second through hole; 2000. static contact lead terminal; 3000. moving assembly; 3100. moving spring assembly; 3100a. first side surface; 3100b. second side surface; 3110. moving spring; 3200. push rod assembly; 3210. push rod; 321 1. Base; 3212. Rod; 3220. Contact bracket; 3221. Bottom wall; 3222a. First side wall; 3222b. Second side wall; 3223. First inner side surface; 3224. First outer side surface; 3225. Second inner side surface; 3226. Second outer side surface; 3230. Stop plate; 3300. Elastic component; 4000. Magnetic circuit portion; 4300. Static iron core; 4310. Through hole; 4400. Moving iron core; 4500. Reset member; 5000. Metal cover; 6100. First magnetic conductor; 6200. Second magnetic conductor; 100. First anti-rotation component; 110. First magnet; 120. Second magnet; 200. Second anti-rotation component; 210. Third magnet; 220. Fourth magnet. DETAILED DESCRIPTION

[0044] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0045] As shown in FIG1 , the relay 1 according to the embodiment of the present application includes a housing 10, a coil unit 20, an arc extinguishing unit 30, and a sealing unit 40. The sealing unit 40 is disposed within the housing 10, and the top of the static contact lead-out terminal of the sealing unit 40 is exposed to the outer surface of the housing 10 through an exposure hole 11 a in the housing 10. The coil unit 20 and the arc extinguishing unit 30 are both disposed within the housing 10.

[0046] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to the process, method, product, or apparatus.

[0047] As an example, the housing 10 includes a first shell 11 and a second shell 12, which are connected to form a chamber for accommodating the coil unit 20, the arc extinguishing unit 30, and the sealing unit 40. In the embodiment of the present application, the exposure hole 11a is provided in the first shell 11.

[0048] The arc extinguishing unit 30 is used to extinguish the arc generated between the static contact lead-out terminal of the sealing unit 40 and the movable reed.

[0049] As an example, the arc extinguishing unit 30 includes two arc extinguishing magnets 31. The arc extinguishing magnets 31 can be permanent magnets, and each arc extinguishing magnet 31 can be substantially rectangular. The two arc extinguishing magnets 31 are respectively disposed on either side of the sealing unit 40 and are arranged opposite each other along the length direction of the movable spring.

[0050] By providing two arc-extinguishing magnets 31 disposed opposite to each other, a magnetic field can be formed around the static contact lead-out terminal and the movable spring. Therefore, the arc generated between the static contact lead-out terminal and the movable spring will be stretched away from each other by the action of the magnetic field, thereby achieving arc extinguishing.

[0051] The arc extinguishing unit 30 also includes two yoke clamps 32, which are arranged corresponding to the positions of the two arc extinguishing magnets 31. In addition, the two yoke clamps 32 surround the sealing unit 40 and the two arc extinguishing magnets 31. The design of the yoke clamps 32 surrounding the arc extinguishing magnets 31 can prevent the magnetic field generated by the arc extinguishing magnets 31 from spreading outward and affecting the arc extinguishing effect. The yoke clamps 32 are made of soft magnetic material. Soft magnetic materials may include but are not limited to iron, cobalt, nickel, and alloys thereof.

[0052] As shown in FIG. 2 to FIG. 6 , the sealing unit 40 includes a contact container 1000 , a pair of static contact lead terminals 2000 , a moving assembly 3000 , and a magnetic circuit portion 4000 .

[0053] It should be noted that the contact container 1000 is a stationary component, which is used to accommodate the contact group and is mainly a housing and has a cavity. In addition, the contact container 1000 can be formed by connecting multiple components in a predetermined assembly method.

[0054] The contact container 1000 has a contact chamber 1001 therein. The contact container 1000 may include an insulating cover 1100 and a yoke plate 1200 . The insulating cover 1100 is disposed on one side surface of the yoke plate 1200 . The insulating cover 1100 and the yoke plate 1200 together enclose the contact chamber 1001 .

[0055] The insulating cover 1100 includes a ceramic cover 1110 and a frame piece 1120. The ceramic cover 1110 is connected to the yoke iron plate 1200 via the frame piece 1120. The frame piece 1120 can be a metal piece with an annular structure, such as an iron-nickel alloy, and one end of the frame piece 1120 is connected to the opening edge of the ceramic cover 1110, for example, by laser welding, brazing, resistance welding, gluing, etc. The other end of the frame piece 1120 is connected to the yoke iron plate 1200, also by laser welding, brazing, resistance welding, gluing, etc. A frame piece 1120 is provided between the ceramic cover 1110 and the yoke iron plate 1200 to facilitate the connection between the ceramic cover 1110 and the yoke iron plate 1200.

[0056] The contact container 1000 further has a pair of first through holes 1002 , which are connected to the contact chamber 1001 . The first through holes 1002 are used to allow the static contact lead terminals 2000 to pass through. In the embodiment of the present application, the first through holes 1002 are formed on the ceramic cover 1110 .

[0057] A pair of static contact lead-out terminals 2000 are connected to the ceramic cover 1110 of the contact container 1000, and at least a portion of each static contact lead-out terminal 2000 is located in the contact chamber 1001. One of the pair of static contact lead-out terminals 2000 serves as a terminal for current inflow, and the other serves as a terminal for current outflow.

[0058] A pair of static contact lead-out terminals 2000 are respectively disposed in the pair of first through holes 1002 and connected to the ceramic cover 1110 , for example, by welding.

[0059] The bottom of the static contact lead-out terminal 2000 serves as a static contact, and the static contact can be provided at the bottom of the static contact lead-out terminal 2000 in an integrated or split manner.

[0060] Continuing with Figures 3 to 6 , the dynamic assembly 3000 includes a dynamic spring assembly 3100, a push rod assembly 3200, and an elastic assembly 3300. The dynamic spring assembly 3100 is disposed within the insulating cover 1100 and is mounted to the push rod assembly 3200 via the elastic assembly 3300. The two ends of the dynamic spring assembly 3100 along a first direction D1 are configured to engage with or disengage from the pair of stationary contact terminals 2000. The first direction D1 represents the arrangement of the pair of stationary contact terminals 2000.

[0061] It should be noted that, if a pair of static contact lead terminals 2000 and a dynamic spring assembly 3100 are regarded as a set of combinations, then the relay of the embodiment of the present application may include multiple sets of combinations.

[0062] The dynamic spring assembly 3100 may include a dynamic spring piece 3110 , and two ends of the dynamic spring piece 3110 along the first direction D1 are used to respectively contact or separate with a pair of static contact lead-out terminals 2000 .

[0063] It is understandable that the number of the movable reed 3110 can be one or more.

[0064] Each movable spring piece 3110 may include a movable spring body and movable contacts disposed at both ends of the movable spring body. The movable contacts may be separate parts connected to the movable spring body. Of course, the movable contacts may also be integrally formed on the movable spring body.

[0065] In the embodiment of the present application, the dynamic spring assembly 3100 includes two dynamic spring pieces 3110 arranged side by side. One end of each dynamic spring piece 3110 is used to contact or separate with the static contact of one of the static contact lead-out terminals 2000, and the other end of each dynamic spring piece 3110 is used to contact or separate with the static contact of the other static contact lead-out terminal 2000. Specifically, one end of each dynamic spring piece 3110 forms two contact points with one of the static contact lead-out terminals 2000, and the other end of each dynamic spring piece 3110 forms two contact points with the other static contact lead-out terminal 2000.

[0066] In other embodiments, the number of the movable reed pieces 3110 can also be one, three, four, five, etc.

[0067] It will be appreciated that the dynamic spring assembly 3100 includes multiple dynamic springs 3110, each of which contacts or separates from a pair of static contact leads at its ends along the first direction D1. Because the multiple dynamic springs 3110 do not restrict each other, they form a reliable parallel circuit when contacted with a pair of static contact leads 2000 at their ends along the first direction D1. The number of contacts formed by the multiple dynamic springs 3110 and a single static contact lead 2000 is greater than or equal to two, achieving a current shunting effect. Furthermore, based on the principle that the magnitude of the electrodynamic repulsive force is proportional to the square of the current, the magnitude of the electrodynamic repulsive force at each contact point is significantly reduced, which helps improve short-circuit resistance and enhances the reliability of the relay.

[0068] Furthermore, the movable spring assembly 3100 may further include a second magnetic conductor 6200, which is fixedly connected to the side of the movable spring piece 3110 facing away from the static contact lead-out terminal 2000. The function of the second magnetic conductor 6200 will be described below.

[0069] The number of movable spring pieces 3110 and second magnets 6200 included in the movable spring assembly 3100 may correspond. Specifically, when there is one movable spring piece 3110, there is also one second magnet 6200; when there are multiple movable spring pieces 3110 (including two), there are also multiple second magnets 6200.

[0070] In other embodiments, the number of movable springs 3110 and second magnetic conductors 6200 may not correspond. For example, the movable spring assembly 3100 includes one movable spring 3110 and two second magnetic conductors 6200. The movable spring 3110 has a through hole. Each second magnetic conductor 6200 has a U-shaped structure, and two adjacent sides of the two U-shaped structures are inserted into the same through hole.

[0071] As shown in Figures 3 to 6, the direction of movement of the movable spring 3110 is defined as the second direction D2, and the direction perpendicular to the first and second directions D1 and D2 is defined as the third direction D3. The push rod assembly 3200 includes a push rod 3210, a contact support 3220, and a stop plate 3230. The push rod 3210 includes a base 3211 and a rod portion 3212, with the base 3211 connected to one axial end of the rod portion 3212. The contact support 3220 includes a bottom wall 3221, a first side wall 3222a, and a second side wall 3222b. The first and second side walls 3222a and 3222b are arranged opposite each other along the third direction D3. One end of the first and second side walls 3222a and 3222b is integrally connected to the two sides of the bottom wall 3221 along the third direction D3, and the other ends of the first and second side walls 3222a and 3222b are connected to the stop plate 3230. The dynamic spring assembly 3100 is installed in the space enclosed by the contact bracket 3220 and the base 3211 through the elastic assembly 3300 .

[0072] The contact support 3220 , the rod 3212 and the base 3211 are connected by injection molding, and the base 3211 covers the bottom wall 3221 and one end of the first side wall 3222 a and one end of the second side wall 3222 b .

[0073] The elastic component 3300 is disposed between the dynamic spring component 3100 and the base 3211 and is used to apply an elastic force to the dynamic spring component 3100 to move toward the stopper 3230 to provide contact pressure.

[0074] It can be understood that the elastic component 3300 can be used to flexibly support the dynamic spring component 3100 to provide contact pressure.

[0075] Of course, in other embodiments, the push rod assembly 3200 may also adopt other structures. For example, the contact support 3220 of the push rod assembly 3200 is an inverted U-shape, including a top wall and two side walls (the two side walls are respectively equivalent to the first side wall 3222a and the second side wall 3222b of the above embodiment), one end of the two side walls are respectively integrally connected to the two side edges of the top wall along the third direction D3, and the other ends of the two side walls are respectively engaged with the base 3211.

[0076] When there are multiple movable spring pieces 3110 , the multiple movable spring pieces 3110 are arranged side by side along the third direction D3 .

[0077] Continuing with Figures 3 to 6 , the yoke plate 1200 has a second through-hole 1210 extending through two opposing sides of the yoke plate 1200 along its thickness. The second through-hole 1210 communicates with the contact chamber 1001 of the contact container 1000. A rod 3212 is axially movably disposed through the second through-hole 1210. A base 3211 at one axial end of the rod 3212 is disposed within the contact chamber 1001.

[0078] The sealing unit 40 further includes a metal cover 5000, which is connected to the side of the yoke plate 1200 facing away from the insulating cover 1100 and covers the second through hole 1210 in the yoke plate 1200. The metal cover 5000 and the yoke plate 1200 enclose a chamber for accommodating the static iron core 4300 and the movable iron core 4400 of the magnetic circuit portion 4000.

[0079] Referring back to FIG1 , the coil unit 20 includes a coil frame 21 and a coil 22 . The coil frame 21 is hollow and cylindrical and is made of insulating material. The metal cover 5000 is inserted into the coil frame 21 . The coil 22 surrounds the coil frame 21 .

[0080] As shown in Figures 3 to 6, the magnetic circuit part 4000 includes a static iron core 4300, a moving iron core 4400 and a reset member 4500. The static iron core 4300 is fixedly arranged in the metal cover 5000, and part of the static iron core 4300 extends into the second through hole 1210. The static iron core 4300 has a through hole 4310, and the through hole 4310 is arranged corresponding to the position of the second through hole 1210, for the rod portion 3212 to pass through it. The moving iron core 4400 is movably arranged in the metal cover 5000, and is arranged opposite to the static iron core 4300 along the axial direction of the rod portion 3212. The moving iron core 4400 is connected to the rod portion 3212, and is used to be attracted by the static iron core 4300 when the coil 22 is energized. The moving iron core 4400 and the rod portion 3212 can be connected by screwing, riveting, welding or other methods.

[0081] The reset member 4500 is located inside the metal cover 5000 and is arranged between the static iron core 4300 and the movable iron core 4400. It is used to reset the movable iron core 4400 when the coil 22 is powered off. The reset member 4500 can be a spring and is sleeved on the outside of the rod 3212.

[0082] It should be noted that when the coil 22 is energized, the stationary iron core 4300 attracts the movable iron core 4400 to move upward, and the movable iron core 4400 can drive the push rod assembly 3200 to move upward via the rod portion 3212. When the movable spring 3110 contacts the static contact lead 2000, the movable spring 3110 is stopped by the static contact lead 2000, while the rod portion 3212 and the base 3211 continue to move upward until the overtravel is completed.

[0083] During the overtravel process, the base 3211 squeezes the elastic component 3300 . After being squeezed, the elastic component 3300 can provide elastic force to the dynamic spring component 3100 to provide contact pressure.

[0084] 4 and 6 , the relay 1 further comprises a first magnetic conductor 6100 , which is fixedly connected to a surface of the stopper 3230 facing the movable spring assembly 3100 , and is located on a side of the movable spring assembly 3100 facing the static contact lead-out terminal 2000 .

[0085] It can be understood that when the movable spring 3110 is energized, the first magnetic conductor 6100 is magnetized, thereby forming an attractive force on the movable spring 3110 in the direction of contact closure. This attractive force can resist the electromotive repulsive force generated by the short-circuit current between the movable spring 3110 and the static contact lead-out terminal 2000, preventing the movable spring 3110 and the static contact lead-out terminal 2000 from bouncing apart, thereby achieving the purpose of resisting short circuit.

[0086] In which, when the dynamic spring assembly 3100 includes multiple dynamic spring pieces 3110 arranged side by side, the number of first magnetic conductors 6100 can be multiple, and the number of first magnetic conductors 6100 corresponds to the number of dynamic spring pieces 3110, and the multiple first magnetic conductors 6100 are respectively located on the side of the multiple dynamic spring pieces 3110 facing the static contact lead-out end 2000.

[0087] Of course, in other embodiments, when the dynamic spring assembly 3100 includes a plurality of dynamic spring pieces 3110 arranged side by side, the number of the first magnetic conductor 6100 may be one, and the first magnetic conductor 6100 spans across the plurality of dynamic spring pieces 3110 in the third direction D3.

[0088] Furthermore, when the dynamic spring assembly 3100 includes the dynamic spring piece 3110 and the second magnetic conductor 6200, the second magnetic conductor 6200 is fixedly connected to the side of the dynamic spring piece 3110 facing away from the static contact lead-out terminal 2000. The second magnetic conductor 6200 is used to form a magnetic circuit with the first magnetic conductor 6100.

[0089] The number of second magnetic conductors 6200 corresponds to the number of movable springs 3110. In the embodiment of the present application, the number of second magnetic conductors 6200 is two, but the present invention is not limited thereto. The two second magnetic conductors 6200 are respectively fixedly connected to the side of the two movable springs 3110 facing away from the static contact lead-out terminal 2000.

[0090] When both ends of the movable spring 3110 along the first direction D1 contact the pair of stationary contact leads 2000, current flows through the movable spring 3110, forming a magnetic circuit surrounding the movable spring 3110 between the first magnetic conductor 6100 and the second magnetic conductor 6200. When a short-circuit current flows through the movable spring 3110, an attractive force is generated between the first magnetic conductor 6100 and the second magnetic conductor 6200 in the direction of contact pressure. This attractive force counteracts the electrodynamic repulsion between the movable spring 3110 and the stationary contact leads 2000 caused by the short-circuit current, preventing the movable spring 3110 and the stationary contact leads 2000 from bouncing apart.

[0091] It is understood that the first magnetic conductor 6100 and the second magnetic conductor 6200 may be in the shape of a straight line or a U. The first magnetic conductor 6100 and the second magnetic conductor 6200 may be made of soft magnetic materials such as iron, cobalt, nickel, and alloys thereof.

[0092] In another embodiment, the first magnetic conductor 6100 may not be mounted on the stopper 3230 of the push rod assembly 3200, but may be fixed relative to the contact container 1000. In this way, the anti-short-circuit suction force is transferred to the contact container 1000. Since the contact container 1000 is a stationary component, excessive coil retention force is not required, thereby reducing the power consumption of the coil of the relay 1 and the size of the relay 1, thereby improving the anti-short-circuit capability.

[0093] In a specific embodiment, the first magnetic conductor 6100 can be fixedly connected to the ceramic cover 1110 of the contact container 1000 .

[0094] In another embodiment, the first magnetizer 6100 is further fixed in the contact container 1000 via a fixing bracket (not shown). Specifically, the fixing bracket is disposed in the contact container 1000 and fixedly connected to the yoke plate 1200, and the first magnetizer 6100 is fixedly connected to the fixing bracket.

[0095] In another embodiment, the distance between the first and second magnetizers 6100, 6200, can be designed to be variable. Specifically, the distance between the first and second magnetizers 6100, 6200 can be adjusted based on the current, thereby varying the magnetic attraction between the first and second magnetizers 6100, 6200. This ensures both short-circuit protection and overload disconnection.

[0096] Optionally, the first magnetic conductor 6100 may include multiple stacked magnetic conductive sheets. It will be appreciated that increasing the number of thinner magnetic conductive sheets can increase the overall thickness of the first magnetic conductor 6100. On the one hand, thinner magnetic conductive sheets can be made from thin strips, resulting in lower material costs and easier handling. On the other hand, the number of magnetic conductive sheets can be flexibly adjusted based on the magnitude of the short-circuit current.

[0097] 4 and 6 , the dynamic spring assembly 3100 has a first side surface 3100a and a second side surface 3100b disposed opposite each other along a third direction D3. The first side surface 3100a corresponds to the first side wall 3222a of the contact support 3220, and the second side surface 3100b corresponds to the second side wall 3222b of the contact support 3220.

[0098] The relay 1 of the present embodiment further includes a first anti-rotation assembly 100 and a second anti-rotation assembly 200. The first anti-rotation assembly 100 includes a first magnet 110 connected to the first side surface 3100a and a second magnet 120 connected to the first side wall 3222a. The facing poles of the first magnet 110 and the second magnet 120 are the same poles, i.e., the pole of the first magnet 110 facing the first side wall 3222a and the pole of the second magnet 120 facing the first side surface 3100a are the same poles. The second anti-rotation assembly 200 includes a third magnet 210 connected to the second side surface 3100b and a fourth magnet 220 connected to the second side wall 3222b. The facing poles of the third magnet 210 and the fourth magnet 220 are the same poles, i.e., the pole of the third magnet 210 facing the second side wall 3222b and the pole of the fourth magnet 220 facing the second side surface 3100b are the same poles.

[0099] In the relay 1 of the embodiment of the present application, the first magnet 110 and the second magnet 120 of the first anti-rotation component 100 have the same magnetic poles facing each other, so a repulsive force is generated between the first magnet 110 and the second magnet 120, and the third magnet 210 and the fourth magnet 220 of the second anti-rotation component 200 have the same magnetic poles facing each other, so a repulsive force is generated between the third magnet 210 and the fourth magnet 220. Since the first magnet 110 and the third magnet 210 are respectively connected to the first side surface 3100a and the second side surface 3100b of the dynamic spring assembly 3100, and the second magnet 120 and the fourth magnet 220 are respectively connected to the first side wall 3222a and the second side wall 3222b of the contact bracket 3220, the dynamic spring assembly 3100 is subjected to a repulsive force on both sides along the third direction D3, and the dynamic spring assembly 3100 is equivalent to being suspended between the first side wall 3222a and the second side wall 3222b. When the movable spring assembly 3100 moves toward the first side wall 3222a, the distance between the first magnet 110 and the second magnet 120 decreases, thereby increasing the repulsive force. This repulsive force prevents the movable spring assembly 3100 from moving further toward the first side wall 3222a, thus preventing the movable spring assembly 3100 from contacting the first side wall 3222a and generating metallic noise. When the movable spring assembly 3100 moves toward the second side wall 3222b, the distance between the third magnet 210 and the fourth magnet 220 decreases, thereby increasing the repulsive force. This repulsive force prevents the movable spring assembly 3100 from moving further toward the second side wall 3222b, thus preventing the movable spring assembly 3100 from contacting the second side wall 3222b and generating metallic noise.

[0100] Thus, in the relay 1 of the present embodiment, the repulsive force generated between the first magnet 110 and the second magnet 120, and the repulsive force generated between the third magnet 210 and the fourth magnet 220, acts on the movable spring assembly 3100 in the third direction D3. This allows the movable spring assembly 3100 to remain between the first side wall 3222a and the second side wall 3222b without rotating relative to the push rod assembly, thereby preventing the movable spring assembly 3100 from contacting and rubbing against the first and second side walls 3222a and 3222b and generating metallic noise. Furthermore, the contact position consistency between the movable spring assembly 3100 and the static contact terminal 2000 is ensured, ensuring stable contact resistance. Furthermore, since the movable spring assembly 3100 does not rotate relative to the push rod assembly, the risk of metallic particles generated by friction between the movable spring assembly 3100 and the contact support 3220 is significantly reduced, thereby ensuring the reliability of the relay 1 product.

[0101] In one embodiment, the first magnet 110 , the second magnet 120 , the third magnet 210 , and the fourth magnet 220 are all permanent magnets.

[0102] It is understandable that the poles facing each other of the first magnet 110 and the second magnet 120 can be either the north pole or the south pole; the poles facing each other of the third magnet 210 and the fourth magnet 220 can be either the north pole or the south pole.

[0103] Furthermore, the magnetic poles facing each other of the first magnet 110 and the second magnet 120 may be the same as or different from the magnetic poles facing each other of the third magnet 210 and the fourth magnet 220. For example, in one embodiment, the magnetic poles facing each other of the first magnet 110 and the second magnet 120 may be north poles, and the magnetic poles facing each other of the third magnet 210 and the fourth magnet 220 may be north poles; in another embodiment, the magnetic poles facing each other of the first magnet 110 and the second magnet 120 may be north poles, and the magnetic poles facing each other of the third magnet 210 and the fourth magnet 220 may be south poles.

[0104] Continuing with Figures 4 and 6 , the first sidewall 3222a has a first inner side surface 3223 facing the movable spring assembly 3100 and a first outer side surface 3224 opposite to the first inner side surface 3223. The second sidewall 3222b has a second inner side surface 3225 facing the movable spring assembly 3100 and a second outer side surface 3226 opposite to the second inner side surface 3225. The second magnet 120 is connected to the first inner side surface 3223, and the fourth magnet 220 is connected to the second inner side surface 3225.

[0105] In one embodiment, the first magnet 110 , the second magnet 120 , the third magnet 210 , and the fourth magnet 220 are all in a flat plate shape, and have the same thickness.

[0106] Furthermore, the shapes of the first magnet 110 , the second magnet 120 , the third magnet 210 and the fourth magnet 220 may be rectangular plates or circular plates, but are not limited thereto.

[0107] Optionally, along the third direction D3 , the orthographic projections of the first magnet 110 , the second magnet 120 , the third magnet 210 , and the fourth magnet 220 on the first inner side surface 3223 completely overlap, but the present invention is not limited thereto.

[0108] In one embodiment, the first magnet 110 and the third magnet 210 may be connected to the dynamic spring assembly 3100 by bonding, welding, etc. The second magnet 120 and the fourth magnet 220 may be connected to the contact support 3220 by bonding, welding, etc.

[0109] 4 and 6 , when the dynamic spring assembly 3100 includes multiple dynamic spring pieces 3110 and multiple second magnetic conductors 6200 , the outermost two second magnetic conductors 6200 have a first side surface 3100 a and a second side surface 3100 b , respectively.

[0110] In other embodiments, when the dynamic spring assembly 3100 only includes a plurality of dynamic spring pieces 3110 , the two outermost dynamic spring pieces 3110 among the plurality of dynamic spring pieces 3110 respectively have a first side surface 3100 a and a second side surface 3100 b .

[0111] In other embodiments, the four magnets (110, 120, 210, 220) may be installed in positions as shown in Figure 7. Specifically, the first magnet 110 is connected to the first side surface 3100a of the dynamic spring assembly 3100, the second magnet 120 is connected to the first outer side surface 3224, the third magnet 210 is connected to the second side surface 3100b of the dynamic spring assembly 3100, and the fourth magnet 220 is connected to the second outer side surface 3226.

[0112] In another embodiment, the four magnets (110, 120, 210, 220) may be installed in the positions shown in Figure 8. Specifically, the first magnet 110 is connected to the first side surface 3100a of the dynamic spring assembly 3100, the second magnet 120 is connected to the first outer side surface 3224, the third magnet 210 is connected to the second side surface 3100b of the dynamic spring assembly 3100, and the fourth magnet 220 is connected to the second inner side surface 3225.

[0113] In yet another embodiment, the four magnets (110, 120, 210, 220) may be installed in the positions shown in Figure 9. Specifically, the first magnet 110 is connected to the first side surface 3100a of the dynamic spring assembly 3100, the second magnet 120 is connected to the first inner side surface 3223, the third magnet 210 is connected to the second side surface 3100b of the dynamic spring assembly 3100, and the fourth magnet 220 is connected to the second outer side surface 3226.

[0114] It is understandable that the various embodiments / implementations provided in this application can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0115] In the application examples, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the application examples can be understood according to the specific circumstances.

[0116] In the description of the application embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the application embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the application embodiments.

[0117] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the claimed invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0118] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A relay, characterized in that: include: A pair of static contact terminals; A dynamic spring assembly, comprising a dynamic spring piece, wherein two ends of the dynamic spring piece along a first direction are used to contact or separate with a pair of static contact lead-out terminals respectively; the first direction is the arrangement direction of the pair of static contact lead-out terminals; the dynamic spring assembly has a first side surface and a second side surface arranged oppositely along a third direction; wherein the movement direction of the dynamic spring piece is defined as a second direction, and the first direction, the second direction and the third direction are perpendicular to each other; The push rod assembly comprises a contact support; the contact support comprises a first side wall and a second side wall which are arranged opposite to each other along the third direction, the first side wall corresponds to the first side surface, and the second side wall corresponds to the second side surface; A first anti-rotation component includes a first magnet connected to the first side surface and a second magnet connected to the first side wall, wherein the first magnet and the second magnet have magnetic poles facing each other with the same name; and The second anti-rotation component includes a third magnet connected to the second side surface and a fourth magnet connected to the second side wall, and the magnetic poles facing each other of the third magnet and the fourth magnet are the same magnetic poles.

2. The relay according to claim 1, characterized in that: The first side wall has a first inner side surface facing the dynamic spring assembly and a first outer side surface disposed opposite to the first inner side surface; The second magnet is connected to the first inner side surface or the first outer side surface.

3. The relay according to claim 1, characterized in that: The second side wall has a second inner side surface facing the dynamic spring assembly and a second outer side surface disposed opposite to the second inner side surface; The fourth magnet is connected to the second inner side surface or the second outer side surface.

4. The relay according to claim 1, characterized in that: The first magnet, the second magnet, the third magnet and the fourth magnet are permanent magnets.

5. The relay according to claim 1, characterized in that: The first magnet, the second magnet, the third magnet, and the fourth magnet are in the shape of a plate, and the first magnet, the second magnet, the third magnet, and the fourth magnet have the same thickness.

6. The relay according to claim 1, characterized in that: The push rod assembly also includes a rod portion and a base connected to one axial end of the rod portion; The contact bracket is connected to the base, and the contact bracket and the base enclose a space for accommodating the dynamic spring assembly.

7. The relay according to claim 6, characterized in that: The contact bracket further includes a bottom wall, and the two ends of the bottom wall along the third direction are respectively connected to one end of the first side wall and one end of the second side wall in an integral manner; the contact bracket, the rod portion and the base are connected by injection molding, and the base covers the bottom wall and one end of the first side wall and the second side wall; The push rod assembly also includes a stopper connected to the other end of the first side wall and the second side wall, and the stopper is arranged on a side of the movable spring assembly facing the static contact lead-out end.

8. The relay according to claim 6, characterized in that: The contact support further comprises a top wall, and two ends of the top wall along the third direction are integrally connected to one end of the first side wall and one end of the second side wall respectively; The other ends of the first side wall and the second side wall are respectively clamped with the base.

9. The relay according to claim 1, characterized in that: The relay further comprises a first magnetic conductor, which is arranged on a side of the movable reed piece facing the static contact lead-out end.

10. The relay according to claim 9, characterized in that: The movable spring assembly further comprises a second magnetic conductor, which is fixedly connected to a side of the movable spring piece facing away from the static contact lead-out end; the second magnetic conductor is used to form a magnetic conductive circuit with the first magnetic conductor.

11. The relay according to any one of claims 1 to 10, characterized in that: The relay further comprises: The elastic component is connected to the dynamic spring component and the push rod component, and the elastic component is used to provide contact pressure.

Images