Relay

Abstract

The invention discloses a relay which comprises a static contact leading-out end, 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 sheet, and the two ends of the movable spring sheet in the first direction are used for making contact with or being separated from the pair of static contact leading-out ends respectively. The first direction is the arrangement direction of the pair of static contact leading-out ends, and the movement direction of the movable contact spring is defined as a second direction; the movable spring assembly is provided with a first side face and a second side face which are oppositely arranged in the third direction perpendicular to the first direction and the second direction. The push rod assembly comprises a contact support with a first side wall and a second side wall which are oppositely arranged along a third direction; the first side wall corresponds to the first side surface, and the second side wall corresponds to the second side surface; the first anti-rotation assembly comprises a first magnet and a second magnet, and the opposite magnetic poles of the first magnet and the second magnet are same magnetic poles; the second anti-rotation assembly comprises a third magnet and a fourth magnet, and the opposite magnetic poles of the third magnet and the fourth magnet are the same magnetic poles.

Description

Technical Field

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

[0002] 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). It is usually used in automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] A high-voltage DC relay is a type of relay. A high-voltage DC relay in the prior art includes a pair of static contact lead-out terminals, a dynamic component, a coil unit, and a magnetic circuit portion. The dynamic component includes a dynamic spring component, a push rod component, and an elastic component. The dynamic spring component is mounted on the push rod component through the elastic component. The magnetic circuit portion includes a static iron core and a dynamic iron core. The static iron core is fixedly arranged in the relay, and the dynamic iron core is connected to the push rod component. When the coil unit is energized, the static iron core can generate a magnetic attraction and attract the dynamic iron core to move, thereby driving the push rod component to move together with the dynamic spring component to achieve contact closure.

[0004] 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, resulting in contact and friction between the movable spring assembly and the contact bracket of the push rod assembly, thereby generating 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 between the movable spring assembly and the static contact lead-out terminal, resulting in unstable contact resistance; in addition, metal particles are easily generated after the friction between the movable spring assembly and the contact bracket. 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. Summary of the invention

[0005] 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.

[0006] The relay of the embodiment of the present application includes:

[0007] A pair of static contact terminals;

[0008] 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;

[0009] 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;

[0010] 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

[0011] 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.

[0012] 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;

[0013] The second magnet is connected to the first inner side surface or the first outer side surface.

[0014] 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;

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

[0016] According to some embodiments of the present application, the first magnet, the second magnet, the third magnet and the fourth magnet are permanent magnets.

[0017] 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 a plate, and the first magnet, the second magnet, the third magnet and the fourth magnet are equal in thickness.

[0018] 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;

[0019] The contact bracket is connected to the base, and the contact bracket and the base enclose a space for accommodating the dynamic spring assembly.

[0020] According to some embodiments of the present application, the contact bracket further includes a bottom wall, and the two ends of the bottom wall along the third direction are respectively integrally connected to one end of the first side wall and one end of the second side wall; 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;

[0021] 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.

[0022] According to some embodiments of the present application, the contact support further includes 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;

[0023] The other ends of the first side wall and the second side wall are respectively clamped with the base.

[0024] According to some embodiments of the present application, the relay further includes a first magnetic conductor, which is disposed on a side of the movable reed piece facing the static contact lead-out end.

[0025] According to some embodiments of the present application, the dynamic spring assembly further includes a second magnetic conductor, which is fixedly connected to a 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.

[0026] According to some embodiments of the present application, the relay further includes:

[0027] 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.

[0028] One embodiment of the above application has at least the following advantages or beneficial effects:

[0029] In the relay of the embodiment of the present application, the repulsive force generated between the first magnet and the second magnet and the repulsive force generated between the third magnet and the fourth magnet causes the repulsive force to act on both sides of the movable spring assembly in the third direction, so that the movable spring assembly can be maintained between the first side wall and the second side wall without rotating relative to the push rod assembly, thereby avoiding the contact and friction between the movable spring assembly and the first side wall and the second side wall to generate metal noise; further, the consistency of the contact position between the movable spring assembly and the static contact lead-out terminal is ensured, and the stability of the contact resistance is ensured. At the same time, since the movable spring assembly will not rotate relative to the push rod assembly, the risk of friction between the movable spring assembly and the contact bracket to generate metal particles is significantly reduced, thereby ensuring the reliability of the relay product. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is an exploded schematic diagram of a relay according to an exemplary embodiment.

[0031] Figure 2 is a schematic top view of a sealing unit according to an exemplary embodiment.

[0032] Figure 3 yes Figure 2 A cross-sectional view along the AA section line in which the movable spring assembly is not in contact with the static contact lead-out terminal.

[0033] Figure 4 yes Figure 2 A cross-sectional view along the BB section line in which the movable spring assembly is not in contact with the static contact lead-out terminal.

[0034] Figure 5 yes Figure 2 A cross-sectional view along the AA section line in which the movable spring assembly contacts the static contact lead-out terminal.

[0035] Figure 6 yes Figure 2 A cross-sectional view along the BB section line in which the movable spring assembly contacts the static contact lead-out terminal.

[0036] Figure 7 is a cross-sectional view of a moving assembly according to another exemplary embodiment.

[0037] Figure 8 is a cross-sectional view of a moving assembly according to yet another exemplary embodiment.

[0038] Fig. 9 is a cross-sectional view of a moving assembly according to yet another exemplary embodiment.

[0039] The reference numerals are described as follows:

[0040] 1. Relay

[0041] 10. Shell

[0042] 11. First shell

[0043] 11a. Exposure hole

[0044] 12. Second shell

[0045] 20. Coil unit

[0046] 21. Coil frame

[0047] 22. Coil

[0048] 30. Arc extinguishing unit

[0049] 31. Arc extinguishing magnet

[0050] 32. Yoke clamp

[0051] 40. Sealing unit

[0052] 1000. Contact container

[0053] 1001. Contact Chamber

[0054] 1002. First through hole

[0055] 1100, Insulation cover

[0056] 1110, Ceramic cover

[0057] 1120, frame

[0058] 1200, Yoke Iron Plate

[0059] 1210, second through hole

[0060] 2000, static contact terminal

[0061] 3000, dynamic components

[0062] 3100、Dynamic spring assembly

[0063] 3100a, first side

[0064] 3100b, second side

[0065] 3110, moving reed

[0066] 3200, Push rod assembly

[0067] 3210, Push rod

[0068] 3211, base

[0069] 3212, Rod

[0070] 3220, contact bracket

[0071] 3221. Bottom wall

[0072] 3222a, first side wall

[0073] 3222b, second side wall

[0074] 3223, first inner side

[0075] 3224, first outer side

[0076] 3225, second inner side

[0077] 3226, second outer side

[0078] 3230, stopper

[0079] 3300, Elastic Components

[0080] 4000, Magnetic Circuit

[0081] 4300, static iron core

[0082] 4310, through hole

[0083] 4400, Moving Iron Core

[0084] 4500, reset parts

[0085] 5000, Metal Cover

[0086] 6100, first magnetic conductor

[0087] 6200, second magnetic conductor

[0088] 100. First anti-rotation component

[0089] 110. The First Magnet

[0090] 120. Second Magnet

[0091] 200. Second anti-rotation component

[0092] 210. The Third Magnet

[0093] 220, the fourth magnet DETAILED DESCRIPTION

[0094] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0095] like Figure 1 As shown, the relay 1 of 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 arranged in the housing 10, and the top of the static contact lead-out end of the sealing unit 40 is exposed to the outer surface of the housing 10 through the exposure hole 11a of the housing 10. The coil unit 20 and the arc extinguishing unit 30 are both arranged in the housing 10.

[0096] 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 device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0097] 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.

[0098] The arc extinguishing unit 30 is used to extinguish the arc generated between the static contact lead-out end of the sealing unit 40 and the moving reed.

[0099] As an example, the arc extinguishing unit 30 includes two arc extinguishing magnets 31. The arc extinguishing magnets 31 may be permanent magnets, and each arc extinguishing magnet 31 may be substantially rectangular. The two arc extinguishing magnets 31 are respectively arranged on both sides of the sealing unit 40 and are arranged opposite to each other along the length direction of the moving spring piece.

[0100] By providing two arc extinguishing magnets 31 arranged opposite to each other, a magnetic field can be formed around the static contact lead-out terminal and the movable reed piece. Therefore, the arc generated between the static contact lead-out terminal and the movable reed piece will be elongated in a direction away from each other by the effect of the magnetic field, thereby achieving arc extinguishing.

[0101] The arc extinguishing unit 30 also includes two yoke iron clamps 32, and the two yoke iron clamps 32 are arranged corresponding to the positions of the two arc extinguishing magnets 31. In addition, the two yoke iron clamps 32 surround the sealing unit 40 and the two arc extinguishing magnets 31. By designing that the yoke iron clamps 32 surround the arc extinguishing magnets 31, it is possible to prevent the magnetic field generated by the arc extinguishing magnets 31 from diffusing outward and affecting the arc extinguishing effect. The yoke iron clamps 32 are made of soft magnetic material. Soft magnetic materials may include but are not limited to iron, cobalt, nickel, and alloys thereof.

[0102] like Figures 2 to 6 As shown, 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 .

[0103] 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 chamber. In addition, the contact container 1000 can be formed by connecting multiple components in a predetermined assembly manner.

[0104] 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 .

[0105] 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 through 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, which can also be done by laser welding, brazing, resistance welding, gluing, etc. A frame piece 1120 is arranged 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.

[0106] The contact container 1000 also has a pair of first through holes 1002, and the first through holes 1002 are connected to the contact chamber 1001. The first through holes 1002 are used for the static contact lead-out terminal 2000 to pass through. In the embodiment of the present application, the first through holes 1002 are opened on the ceramic cover 1110.

[0107] 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.

[0108] A pair of static contact lead-out terminals 2000 are disposed in a pair of first through holes 1002 in a one-to-one correspondence, and are connected to the ceramic cover 1110 , for example, by welding.

[0109] The bottom of the static contact lead-out terminal 2000 serves as a static contact, and the static contact may be integrally or separately arranged at the bottom of the static contact lead-out terminal 2000 .

[0110] Please continue reading Figures 3 to 6 The movable assembly 3000 includes a movable spring assembly 3100, a push rod assembly 3200 and an elastic assembly 3300. The movable spring assembly 3100 is disposed in the insulating cover 1100 and is mounted on the push rod assembly 3200 through the elastic assembly 3300. The two ends of the movable spring assembly 3100 along the first direction D1 are used to contact or separate with a pair of static contact lead-out terminals 2000 respectively. The first direction D1 is the arrangement direction of the pair of static contact lead-out terminals 2000.

[0111] It should be noted that, if a pair of static contact lead terminals 2000 and a movable 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.

[0112] 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 contact or separate from a pair of static contact lead-out terminals 2000 , respectively.

[0113] It is understandable that the number of the movable reed 3110 can be one or more.

[0114] 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 and connected to the movable spring body. Of course, the movable contacts may also be integrally formed on the movable spring body.

[0115] 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 the two dynamic spring pieces 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 the two dynamic spring pieces 3110 is used to contact or separate with the static contact of the other static contact lead-out terminal 2000. Further, one end of the two dynamic spring pieces 3110 forms two contact points with one of the static contact lead-out terminals 2000, and the other end of the two dynamic spring pieces 3110 forms two contact points with the other static contact lead-out terminal 2000.

[0116] In other embodiments, the number of the movable reed pieces 3110 may also be one, three, four, five, etc.

[0117] It can be understood that the dynamic spring assembly 3100 includes a plurality of dynamic spring pieces 3110, and the two ends of the plurality of dynamic spring pieces 3110 along the first direction D1 are respectively in contact with or separated from a pair of static contact lead-out terminals. Since the plurality of dynamic spring pieces 3110 will not restrict each other, the two ends of the plurality of dynamic spring pieces 3110 along the first direction D1 are respectively in contact with a pair of static contact lead-out terminals 2000 to form a reliable parallel circuit. The number of contacts formed by the plurality of dynamic spring pieces 3110 and a static contact lead-out terminal 2000 is greater than or equal to two, achieving a shunting effect. In addition, according to the principle that the magnitude of the electric repulsive force is proportional to the square of the current, the magnitude of the electric repulsive force of each contact is significantly reduced, which is conducive to the improvement of the short-circuit resistance and the reliability of the relay.

[0118] Furthermore, the movable spring assembly 3100 may further include a second magnetic conductor 6200, which is fixedly connected to a side of the movable spring piece 3110 facing away from the static contact lead-out end 2000. The function of the second magnetic conductor 6200 will be described below.

[0119] The number of the movable spring pieces 3110 and the second magnetizers 6200 included in the movable spring assembly 3100 may correspond. Specifically, when the number of the movable spring piece 3110 is one, the number of the second magnetizer 6200 is also one; when the number of the movable spring pieces 3110 is multiple (including two), the number of the second magnetizers 6200 is also multiple.

[0120] In other embodiments, the number of the movable spring piece 3110 and the second magnetizer 6200 may not correspond. For example, the movable spring assembly 3100 includes a movable spring piece 3110 and two second magnetizers 6200, the movable spring piece 3110 is provided with a through hole, each second magnetizer 6200 is a U-shaped structure, and two adjacent side portions of the two U-shaped structures are inserted into the same through hole.

[0121] like Figures 3 to 6 As shown, the movement direction of the movable spring 3110 is defined as the second direction D2, and the direction perpendicular to the first direction D1 and the second direction D2 is defined as the third direction D3. The push rod assembly 3200 includes a push rod 3210, a contact bracket 3220 and a stopper 3230. The push rod 3210 includes a base 3211 and a rod portion 3212, and the base 3211 is connected to an axial end of the rod portion 3212. The contact bracket 3220 includes a bottom wall 3221, a first side wall 3222a and a second side wall 3222b, and the first side wall 3222a and the second side wall 3222b are arranged opposite to each other along the third direction D3. One end of the first side wall 3222a and the second side wall 3222b are respectively connected to the two sides of the bottom wall 3221 along the third direction D3, and the other end of the first side wall 3222a and the second side wall 3222b are connected to the stopper 3230. The dynamic spring assembly 3100 is installed in the space enclosed by the contact support 3220 and the base 3211 through the elastic assembly 3300 .

[0122] The contact support 3220 , the rod portion 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 .

[0123] 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 piece 3230 , so as to provide contact pressure.

[0124] It can be understood that the elastic component 3300 can be used to flexibly support the dynamic spring component 3100 to provide contact pressure.

[0125] Of course, in other embodiments, the push rod assembly 3200 may also adopt other structures. For example, the contact bracket 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 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 clamped with the base 3211.

[0126] When there are multiple movable spring pieces 3110 , the multiple movable spring pieces 3110 are arranged side by side along the third direction D3 .

[0127] Please continue reading Figures 3 to 6 The yoke plate 1200 has a second through hole 1210, which penetrates two opposite sides of the yoke plate 1200 along the thickness direction of the yoke plate 1200, and the second through hole 1210 is connected to the contact chamber 1001 of the contact container 1000. The rod portion 3212 is movably disposed in the second through hole 1210 along the axial direction. The base 3211 at one axial end of the rod portion 3212 is disposed in the contact chamber 1001.

[0128] 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 the metal cover 5000 covers the second through hole 1210 on 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 moving iron core 4400 of the magnetic circuit part 4000.

[0129] Return to Reference Figure 1 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.

[0130] like Figures 3 to 6 As shown, 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 therethrough. 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.

[0131] The reset member 4500 is located inside the metal cover 5000 and is disposed between the static iron core 4300 and the moving iron core 4400, and is used to reset the moving 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.

[0132] It should be noted that when the coil 22 is energized, the static iron core 4300 attracts the moving iron core 4400 to move upward, and the moving iron core 4400 can drive the push rod assembly 3200 to move upward through the rod portion 3212. When the moving spring piece 3110 contacts the static contact lead-out end 2000, the moving spring piece 3110 is stopped by the static contact lead-out end 2000, while the rod portion 3212 and the base 3211 will continue to move upward until the overtravel is completed.

[0133] During the overtravel process, the base 3211 will squeeze 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.

[0134] Please continue reading Figure 4 and Figure 6 The relay 1 further includes a first magnetic conductor 6100 , which is fixedly connected to a surface of the stopper piece 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 .

[0135] It can be understood that when the moving reed 3110 is energized, the first magnetic conductor 6100 is magnetized, thereby forming a suction force on the moving reed 3110 in the direction of contact closure, and the suction force can resist the electromotive repulsion between the moving reed 3110 and the static contact lead-out terminal 2000 due to the short-circuit current, thereby preventing the moving reed 3110 and the static contact lead-out terminal 2000 from bouncing apart, thereby achieving the purpose of resisting short circuit.

[0136] 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 one side of the multiple dynamic spring pieces 3110 facing the static contact lead-out end 2000.

[0137] 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.

[0138] Further, 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 end 2000. The second magnetic conductor 6200 is used to form a magnetic circuit with the first magnetic conductor 6100.

[0139] The number of the second magnetic conductors 6200 corresponds to the number of the movable spring pieces 3110. In the embodiment of the present application, the number of the second magnetic conductors 6200 is two, but not limited thereto. The two second magnetic conductors 6200 are respectively fixedly connected to the side of the two movable spring pieces 3110 facing away from the static contact lead-out end 2000.

[0140] When the two ends of the movable spring piece 3110 along the first direction D1 are in contact with a pair of stationary contact lead-out terminals 2000 respectively, current flows in the movable spring piece 3110, thereby forming a magnetic conductive loop around the movable spring piece 3110 between the first magnetic conductive body 6100 and the second magnetic conductive body 6200. When the short-circuit current passes through the movable spring piece 3110, an attractive force is generated between the first magnetic conductive body 6100 and the second magnetic conductive body 6200 in the direction of contact pressure, and the attractive force can resist the electromotive repulsion force generated by the short-circuit current between the movable spring piece 3110 and the stationary contact lead-out terminals 2000, thereby preventing the movable spring piece 3110 and the stationary contact lead-out terminals 2000 from being bounced apart.

[0141] It is understandable that the first magnetic conductor 6100 and the second magnetic conductor 6200 may be in a straight line or a U-shape. 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.

[0142] In another embodiment, the first magnetic conductor 6100 may not be installed on the stopper 3230 of the push rod assembly 3200, but may be fixedly arranged relative to the contact container 1000. In this way, the suction force for resisting short circuit is transferred to the contact container 1000. Since the contact container 1000 is a stationary component, there is no need for excessive coil holding force, thereby reducing the power consumption of the coil of the relay 1 and the volume of the relay 1, and improving the short circuit resistance.

[0143] In a specific implementation, the first magnetic conductor 6100 may be fixedly connected to the ceramic cover 1110 of the contact container 1000 .

[0144] In another specific embodiment, the first magnetizer 6100 is also fixed in the contact container 1000 through a fixing bracket (not shown in the figure). Specifically, the fixing bracket is arranged 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.

[0145] In another embodiment, the distance between the first magnetizer 6100 and the second magnetizer 6200 can be designed to be variable. Specifically, the distance between the first magnetizer 6100 and the second magnetizer 6200 can be adjusted according to the magnitude of the current value, thereby changing the magnitude of the magnetic attraction generated between the first magnetizer 6100 and the second magnetizer 6200, while meeting the requirements of short circuit resistance and overload disconnection.

[0146] Optionally, the first magnetic conductor 6100 may include a plurality of stacked magnetic conductors. It is understood that by increasing the number of thinner magnetic conductors, the overall thickness of the first magnetic conductor 6100 may be increased. On the one hand, the magnetic conductors are thinner and can be made of thin strips, so the material cost is low and easy to operate. On the other hand, the number of magnetic conductors can be flexibly adjusted according to the size of the short-circuit current.

[0147] Please continue reading Figure 4 and Figure 6 The dynamic spring assembly 3100 has a first side surface 3100a and a second side surface 3100b disposed opposite to 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.

[0148] The relay 1 of the embodiment of the present application further includes a first anti-rotation component 100 and a second anti-rotation component 200. The first anti-rotation component 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, and the magnetic poles facing each other of the first magnet 110 and the second magnet 120 are the same magnetic poles. The second anti-rotation component 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, and the magnetic poles facing each other of the third magnet 210 and the fourth magnet 220 are the same magnetic poles.

[0149] In the relay 1 of the embodiment of the present application, the magnetic poles facing each other of the first magnet 110 and the second magnet 120 of the first anti-rotation component 100 are the same magnetic poles, so a repulsive force is generated between the first magnet 110 and the second magnet 120, and the magnetic poles facing each other of the third magnet 210 and the fourth magnet 220 of the second anti-rotation component 200 are the same magnetic poles, 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 movable 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 movable spring assembly 3100 is subjected to a repulsive force on both sides along the third direction D3, and the movable 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 direction close to the first side wall 3222a, the distance between the first magnet 110 and the second magnet 120 becomes smaller, and the repulsive force increases. The repulsive force can prevent the movable spring assembly 3100 from continuing to move toward the first side wall 3222a, and prevent the movable spring assembly 3100 from contacting the first side wall 3222a and generating metal noise. When the movable spring assembly 3100 moves toward the direction close to the second side wall 3222b, the distance between the third magnet 210 and the fourth magnet 220 becomes smaller, and the repulsive force increases. The repulsive force can prevent the movable spring assembly 3100 from continuing to move toward the second side wall 3222b, and prevent the movable spring assembly 3100 from contacting the second side wall 3222b and generating metal noise.

[0150] It can be seen that in the relay 1 of the embodiment of the present application, 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, the dynamic spring assembly 3100 is subjected to the repulsive force in the third direction D3, so that the dynamic spring assembly 3100 can be maintained between the first side wall 3222a and the second side wall 3222b without rotating relative to the push rod assembly, thereby avoiding the dynamic spring assembly 3100 from contacting and rubbing with the first side wall 3222a and the second side wall 3222b to generate metal noise; further, the consistency of the contact position between the dynamic spring assembly 3100 and the static contact lead-out terminal 2000 is ensured, and the stability of the contact resistance is ensured. At the same time, since the dynamic spring assembly 3100 will not rotate relative to the push rod assembly, the risk of friction between the dynamic spring assembly 3100 and the contact bracket 3220 to generate metal particles is significantly reduced, thereby ensuring the reliability of the operation of the relay 1 product.

[0151] In one embodiment, the first magnet 110 , the second magnet 120 , the third magnet 210 , and the fourth magnet 220 are all permanent magnets.

[0152] It is understandable that the magnetic poles facing each other of the first magnet 110 and the second magnet 120 can be either N poles or S poles; the magnetic poles facing each other of the third magnet 210 and the fourth magnet 220 can be either N poles or S poles.

[0153] In addition, 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 N poles, and the magnetic poles facing each other of the third magnet 210 and the fourth magnet 220 may be N poles; in another embodiment, the magnetic poles facing each other of the first magnet 110 and the second magnet 120 may be N poles, and the magnetic poles facing each other of the third magnet 210 and the fourth magnet 220 may be S poles.

[0154] Please continue reading Figure 4 and Figure 6 The first side wall 3222a has a first inner side surface 3223 facing the movable spring assembly 3100 and a first outer side surface 3224 disposed opposite to the first inner side surface 3223. The second side wall 3222b has a second inner side surface 3225 facing the movable spring assembly 3100 and a second outer side surface 3226 disposed 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.

[0155] In one embodiment, the first magnet 110 , the second magnet 120 , the third magnet 210 , and the fourth magnet 220 are all in the shape of a plate, and the first magnet 110 , the second magnet 120 , the third magnet 210 , and the fourth magnet 220 have the same thickness.

[0156] 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.

[0157] 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.

[0158] 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.

[0159] Please continue reading Figure 4 and Figure 6When the dynamic spring assembly 3100 includes a plurality of dynamic spring pieces 3110 and a plurality of second magnetic conductors 6200 , two second magnetic conductors 6200 located on the outermost sides of the plurality of second magnetic conductors 6200 respectively have a first side surface 3100 a and a second side surface 3100 b .

[0160] In other embodiments, when the dynamic spring assembly 3100 includes only a plurality of dynamic spring pieces 3110 , two dynamic spring pieces 3110 located at the outermost sides of the plurality of dynamic spring pieces 3110 respectively have a first side surface 3100 a and a second side surface 3100 b .

[0161] In other embodiments, the installation positions of the four magnets (110, 120, 210, 220) can also be 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.

[0162] In another embodiment, the installation positions of the four magnets (110, 120, 210, 220) can also be 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.

[0163] In yet another embodiment, the installation positions of the four magnets (110, 120, 210, 220) can also be Fig. 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.

[0164] It is understandable that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0165] In the application embodiments, 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. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0166] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0167] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

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

Claims

1. A relay, characterized 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.

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