Relay

Abstract

The invention discloses a relay which comprises a contact part, a driving part and an anti-short-circuit structure, the contact part comprises two contact assemblies, one contact assembly is provided with a static contact, the other contact assembly is provided with a movable contact spring and a movable contact, one end of the movable contact spring is fixed relative to the position of the static contact, and the other end of the movable contact spring can swing; the movable contact is arranged on the movable reed; the driving part is connected with the movable reed so as to drive the movable reed to swing, so that the movable contact is in contact with or separated from the static contact; the anti-short-circuit structure comprises a first magnetizer and a second magnetizer, and the second magnetizer is arranged on the driving part; and the first magnetizer and the second magnetizer are configured to be magnetized to attract each other when the contact part is electrified and at least apply pressure towards the static contact to the part, used for driving the movable reed to swing, on the driving part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric control devices, in particular to a relay. BACKGROUND

[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), and is usually applied in an automatic control circuit. The relay is actually a kind of "automatic switch" that uses a small current to control a large current. Therefore, it plays a role in automatic regulation, safety protection, and conversion of circuits.

[0003] As one type of relay, a magnetic latching relay includes two contact assemblies and a driving part. One of the contact assemblies has a stationary contact, and the other contact assembly has a movable contact. The driving part is used to drive the other contact assembly to move, so that the movable contact is in contact with or separated from the stationary contact. When a large short-circuit current flows through the two contact assemblies, the movable contact will be repelled by the electrodynamic force generated by the short-circuit current, and then push the armature assembly of the driving part to move in the direction of breaking the contact, which eventually leads to the failure of the relay. SUMMARY

[0004] Embodiments of the present application provide a relay to solve the problem of instantaneous disconnection of the movable and stationary contacts in the related art.

[0005] The relay of embodiments of the present application includes: a contact part including two contact assemblies, one of which has a stationary contact, and the other of which has a movable spring and a movable contact, one end of the movable spring being fixed relative to the position of the stationary contact, and the other end being swingable; the movable contact being provided on the movable spring; a driving part connected to the movable spring to drive the movable spring to swing, so that the movable contact is in contact with or separated from the stationary contact; and a short-circuit resistance structure including a first magnetic conductor and a second magnetic conductor, the second magnetic conductor being installed on the driving part; the first magnetic conductor and the second magnetic conductor being configured to be magnetized and attracted to each other when the contact part is energized, and at least exerting a pressure on the part of the driving part for driving the movable spring to swing towards the stationary contact.

[0006] According to some embodiments of the present application, the driving part includes a pusher connected to the movable spring; the second magnetic conductor is installed on the pusher; and the movable contact and the stationary contact are in a non-contact state, and the second magnetic conductor is fixed relative to the pusher.

[0007] According to some embodiments of the present application, the pusher moves linearly or approaches linear motion.

[0008] According to some embodiments of the present application, in the contact state of the movable contact and the fixed contact, the second magnetic conductor is configured to move towards the first magnetic conductor to reduce the magnetic gap between the second magnetic conductor and the first magnetic conductor when the current value flowing through the contact portion is greater than or equal to a threshold value.

[0009] According to some embodiments of the present application, the driving portion further comprises a movable component connected to the pusher, the movable component is configured to move and drive the pusher when subjected to an external force; the movable component and the pusher are in clearance fit along the moving direction of the pusher to provide a moving space for the pusher; the second magnetic conductor is fixed to the pusher.

[0010] According to some embodiments of the present application, the movable component is an armature assembly capable of being driven by a magnetic force; one end of the pusher is in clearance fit with the armature assembly and the other end is connected to the movable spring.

[0011] According to some embodiments of the present application, the second magnetic conductor is located on the side of the movable spring facing the fixed contact.

[0012] According to some embodiments of the present application, the first magnetic conductor is fixed to the portion of the contact assembly with the fixed contact through which the current flows, and at least part of the first magnetic conductor is located on the side of the contact assembly with the fixed contact away from the movable spring along the moving direction of the pusher.

[0013] According to some embodiments of the present application, the pusher and the second magnetic conductor are connected by integral injection molding.

[0014] According to some embodiments of the present application, the second magnetic conductor is movably installed on the pusher along the moving direction of the pusher; in the non-contact state of the movable contact and the fixed contact and in the contact state of the movable contact and the fixed contact when the current value of the contact portion is less than the threshold value, the second magnetic conductor is held on the pusher along the disconnection direction of the movable contact based on elastic action or magnetic action; in the contact state of the movable contact and the fixed contact when the current value of the contact portion is greater than or equal to the threshold value, the second magnetic conductor moves towards the first magnetic conductor to reduce the magnetic gap between the second magnetic conductor and the first magnetic conductor by overcoming the elastic action or the magnetic action.

[0015] According to some embodiments of the present application, the contact assembly with the movable spring further comprises a compression spring arranged between the movable spring and the pusher, the compression spring is configured to store energy and provide contact pressure to the movable spring when the contact portion is in the closed state. The second magnetic conductor is located on the side of the compression spring opposite to the first magnetic conductor, and is configured to be held by the elastic force of the compression spring relative to the pusher and to move relative to the pusher towards the first magnetic conductor when the current value flowing through the contact portion is greater than or equal to the threshold value, and to press the compression spring to increase the deformation of the compression spring.

[0016] According to some embodiments of the present application, the relay further comprises a housing; the contact portion, the driving portion and the anti-short circuit structure are arranged in the housing; The first magnetic conductor is fixedly arranged on the housing or the contact assembly with the static contact relative to the static contact; or, The first magnetic conductor is movably arranged on the housing or the contact assembly with the static contact relative to the static contact, and the first magnetic conductor is held on the contact assembly with the static contact or the housing along the closing direction of the movable contact based on the elastic force or the magnetic force when the movable contact and the static contact are in the non-contact state and the movable contact and the static contact are in the contact state and the current value of the contact portion is less than a threshold value; and the first magnetic conductor moves towards the second magnetic conductor to reduce the magnetic gap between the first magnetic conductor and the second magnetic conductor when the movable contact and the static contact are in the contact state and the current value of the contact portion is greater than or equal to the threshold value.

[0017] According to some embodiments of the present application, the contact assembly with the movable spring plate further comprises a compression spring arranged between the movable spring plate and the pusher, and the compression spring is configured to store energy and provide contact pressure to the movable spring plate when the contact portion is in the closed state; the position of the compression spring acting on the movable spring plate is located at the position of the movable contact, or the position of the compression spring acting on the movable spring plate and the pusher are both located between the fixed end of the movable spring plate and the movable contact or both located between the movable contact and the movable end of the movable spring plate.

[0018] According to some embodiments of the present application, the pusher is limited in the moving range by the contact assembly with the movable spring plate in the length direction and the width direction of the movable spring plate.

[0019] According to some embodiments of the present application, the contact assembly with the moving spring leaf further comprises a compression spring arranged between the moving spring leaf and the pusher, the compression spring is configured to provide contact pressure when the contact part is in the closed state, the compression spring comprises a connecting end and a swing end, the connecting end is fixed to the moving spring leaf, the swing end is in abutment with the pusher, the swing end has two limiting portions, the two limiting portions are arranged in the length direction of the moving spring leaf, and at least part of the pusher is located between the two limiting portions.

[0020] According to some embodiments of the present application, the moving spring leaf and / or the compression spring has a limiting groove, the limiting groove has two groove walls, the two groove walls are arranged opposite in the width direction of the moving spring leaf, and at least part of the pusher is located in the limiting groove.

[0021] According to some embodiments of the present application, the groove wall is an arc surface.

[0022] According to some embodiments of the present application, two contact parts are included; the two contact parts are respectively a first contact part and a second contact part; the static contact, the moving spring leaf and the moving contact in the first contact part are respectively a first static contact, a second moving spring leaf and a second moving contact; the static contact, the moving spring leaf and the moving contact in the second contact part are respectively a second static contact, a first moving spring leaf and a first moving contact; two ends of the first moving spring leaf are respectively a first fixed end and a first movable end, the first moving contact is arranged close to the first movable end; the first static contact is electrically connected with the first fixed end; two ends of the second moving spring leaf are respectively a second fixed end and a second movable end, the second moving contact is arranged close to the second movable end; the second static contact is electrically connected with the second fixed end; the driving part drives the first moving spring leaf and the second moving spring leaf to move through one pusher, so that the second moving contact and the first static contact and the first moving contact and the second static contact are in contact or separated; wherein, when the two contact parts are in the closed state, at least part of the first moving spring leaf and at least part of the second moving spring leaf are arranged opposite in the contact and separation direction of the moving contact and the static contact, and the current flowing in the same direction; the second moving contact and the first static contact form a first contact group, the first moving contact and the second static contact form a second contact group, and at least one of the first contact group and the second contact group is provided with the anti-short circuit structure.

[0023] According to some embodiments of the present application, the contact assembly with the first moving contact further comprises a first compression spring, the contact assembly with the second moving contact further comprises a second compression spring, the first compression spring is arranged between the first moving contact and the corresponding pusher, the second compression spring is arranged between the second moving contact and the corresponding pusher, and the first compression spring and the second compression spring are configured to store energy and provide contact pressure to the first moving contact and the second moving contact respectively when the contact part is in the closed state. The first compression spring comprises a first deformation section and a second deformation section, one end of the first deformation section is connected to the first moving contact, and the other end is connected to the second deformation section; the first deformation section and the second deformation section are both inclined relative to the main plate surface of the first moving contact, and the slope of the first deformation section is greater than the slope of the second deformation section; and / or, The second compression spring comprises a third deformation section and a fourth deformation section, one end of the third deformation section is connected to the second moving contact, and the other end is connected to the fourth deformation section; the third deformation section and the fourth deformation section are both inclined relative to the main plate surface of the second moving contact, and the slope of the third deformation section is greater than the slope of the fourth deformation section.

[0024] According to some embodiments of the present application, the contact assembly with the first stationary contact further comprises a first lead terminal fixedly connected to the first stationary contact, and the contact assembly with the second stationary contact further comprises a second lead terminal fixedly connected to the second stationary contact. When the first contact group is provided with the anti-short circuit structure, the corresponding first magnetic conductor is fixedly connected to the side surface of the first lead terminal away from the second moving contact. When the second contact group is provided with the anti-short circuit structure, the corresponding first magnetic conductor is fixedly connected to the side surface of the second lead terminal away from the first moving contact.

[0025] According to some embodiments of the present application, the relay further comprises a housing, and an inner wall surface of the housing is provided with a first positioning part. The first magnetic conductor has a second positioning part, the second positioning part is in positioning cooperation with the first positioning part and in limiting cooperation along the contact separation direction of the moving contact and the stationary contact.

[0026] According to some embodiments of the present application, the first positioning part is a groove, and the second positioning part is inserted into the groove.

[0027] According to some embodiments of the present application, one end of the first magnetic conductor is bent away from the side of the second magnetic conductor to form the second positioning part.

[0028] According to some embodiments of the present application, the driving portion and the contact portion are arranged along a contact separation direction of the fixed contact and the movable contact; The relay further comprises two conductive members respectively connected to the first and second lead terminals and respectively extending from the first and second lead terminals to a side away from the driving portion along the contact separation direction of the fixed contact and the movable contact.

[0029] According to some embodiments of the present application, the first and second movable contact springs are arranged along a contact separation direction of the fixed contact and the movable contact, and the second movable contact spring is closer to the driving portion; the first contact group is provided with the anti-short circuit structure.

[0030] According to some embodiments of the present application, at least one of the first and second movable contact springs has a plurality of laminated leaf springs, and some of the leaf springs between the first and second contact groups have bending portions; The bending portion of the first movable contact spring protrudes towards the second movable contact spring, and the bending portion of the second movable contact spring protrudes towards the first movable contact spring.

[0031] According to some embodiments of the present application, the driving portion comprises an armature assembly and two push members, the armature assembly has two driving ends, the armature assembly is swingably arranged relative to the first fixed contact, and the swing center of the armature assembly is linearly arranged with the two driving ends; one end of each of the two push members is connected to the first and second movable contact springs, respectively, and the other end of each of the two push members is movably connected to the two driving ends, respectively.

[0032] According to some embodiments of the present application, along the contact separation direction of the fixed contact and the movable contact, the first movable end corresponds to the position of the second fixed end, the second movable end corresponds to the position of the first fixed end, and the first and second movable ends are arranged on the side of the second and first fixed ends, respectively, towards the driving portion.

[0033] According to some embodiments of the present application, the first and second movable contact springs are arranged in a cross manner, and the cross region is located between the first and second contact groups.

[0034] According to some embodiments of the present application, the first movable contact spring further has a first bending section, the first fixed end is connected to the first movable end through the first bending section, so that the first movable contact and the first fixed contact on the first movable contact spring are arranged in a staggered manner along the contact separation direction of the movable contact and the fixed contact. The second movable spring plate further has a second curved section, and the second fixed end is connected with the second movable end through the second curved section, so that the second movable contact and the second fixed contact on the second movable spring plate are arranged in a staggered manner in the contact separation direction of the movable contact and the fixed contact. The first curved section and the second curved section are arranged in a cross manner.

[0035] According to some embodiments of the present application, the first fixed end and the second fixed end are flat and arranged on the same first plane, and the first plane is perpendicular to the contact separation direction of the movable contact and the fixed contact.

[0036] According to some embodiments of the present application, the first lead terminal and the second lead terminal are both in a plate structure and arranged on the same second plane, and the second plane is perpendicular to the contact separation direction of the movable contact and the fixed contact.

[0037] According to some embodiments of the present application, the driving part comprises a coil assembly and an armature assembly, the coil assembly comprises a coil frame, a coil winding, an iron core and two yokes, the coil winding is wound around the outer periphery of the coil frame, the iron core is arranged in the coil frame and surrounded by the coil winding, and the two yokes are respectively fixed to the axial ends of the iron core, one end of each of the two yokes extends to the same side of the coil assembly and forms two magnetic driving ends for electromagnetic coupling with the armature assembly.

[0038] According to some embodiments of the present application, the relay is a magnetic latching relay.

[0039] According to some embodiments of the present application, the driving part comprises a motor.

[0040] The above-mentioned embodiment has at least the following advantages or beneficial effects: The relay of the embodiment of the present application, when the short-circuit current passes through the contact part, the magnetic attraction force in the direction of the contact pressure between the first magnetic conductor and the second magnetic conductor can be generated, which makes the moving spring plate resist the electric repulsion between the moving contact and the static contact due to the short-circuit current, and further avoids the instantaneous disconnection of the moving contact and the static contact. In addition, since the second magnetic conductor is not arranged on the moving spring plate, the deformation of the moving spring plate due to the magnetic attraction force can be avoided, and the driving part is not pushed and moved in the direction of disconnection of the contact, so that the disconnection of the moving contact and the static contact and the failure of the relay are avoided. Since the magnetic attraction force between the second magnetic conductor and the first magnetic conductor does not directly act on the moving spring plate, and the maximum displacement of the second magnetic conductor is limited by the driving part, the second magnetic conductor arranged on the driving part can also limit the upper limit of the contact pressure that can be provided. When a large fault current occurs, the increased magnetic attraction force between the second magnetic conductor and the first magnetic conductor will not excessively increase the contact pressure between the moving contact and the static contact, so that the probability of contact welding and bonding is reduced, and the subsequent normal use of the product is ensured. At the same time, since the second magnetic conductor is not arranged on the moving spring plate, even if the first magnetic conductor and the second magnetic conductor are attracted to each other, the moving spring plate will not be conducted through the first magnetic conductor and the second magnetic conductor with the contact assembly having the static contact, so as to ensure that the two contact assemblies are only contacted through the moving contact and the static contact, and the good contact performance between the two contact assemblies is ensured. Furthermore, since the second magnetic conductor is arranged on the driving part and not arranged on the moving spring plate, the weight of the moving spring plate is not increased, and the kinetic energy of the moving spring plate during movement is not increased, so as to ensure the stability of the moving contact and the static contact during contact, which can avoid excessive vibration during contact of the moving contact and the static contact, and can avoid the rebound phenomenon of the moving contact and the static contact, and can avoid repeated arc of the moving contact and the static contact to affect the service life. In addition, since the contact or disconnection of the moving spring plate and the static contact depends on the elastic deformation ability of the moving spring plate itself, if the second magnetic conductor is directly arranged on the moving spring plate, the rigidity of the moving spring plate will be increased due to the larger rigidity and larger area of the second magnetic conductor, and a larger driving force will be required or the moving spring plate will be easily misoperated in the closing direction or the disconnection direction without sufficient driving force. Therefore, in the embodiment of the present application, the second magnetic conductor is not arranged on the moving spring plate, which can also avoid affecting the flexibility of the moving spring plate, reduce the energy consumption increment, and avoid the misoperation of the relay.

[0041] Further, during the process of driving the moving spring to move, the second magnetic conductor is stable relative to the position of the pusher. Compared with the scheme that the second magnetic conductor is movable relative to the pusher when the moving contact and the stationary contact are in the non-contact state, the embodiment has at least the following advantages: 1. When the moving contact and the stationary contact are in contact, the magnetic gap between the second magnetic conductor and the first magnetic conductor is stable and always meets the expected demand, and the short circuit resistance effect is more reliable; 2. The second magnetic conductor and the pusher do not have relative displacement and generate friction, thereby avoiding increasing the pull-in voltage and the release voltage of the relay; 3. The amount of wear of the pusher is reduced, thereby prolonging the service life of the relay.

[0042] Further, compared with the scheme that the second magnetic conductor is directly mounted on the moving spring, in the embodiment, since the pusher moves linearly or nearly linearly, mounting the second magnetic conductor on the pusher is conducive to avoiding the inclination of the second magnetic conductor, thereby avoiding the uneven distribution of the magnetic gap between the first magnetic conductor and the second magnetic conductor, and weakening the magnetic attraction force and the short circuit resistance capability.

[0043] Further, when the contact part is in the closed state, the second magnetic conductor can reduce the magnetic gap between the second magnetic conductor and the first magnetic conductor according to whether the current value flowing through the contact part is greater than or equal to a threshold value. In this way, based on the current value flowing through the contact part, the size of the magnetic gap between the second magnetic conductor and the first magnetic conductor can be adjusted to take into account the short circuit resistance capability and the overload breaking capability.

[0044] Further, the swinging end is bent to be connected to the connecting end in a direction away from the first moving spring, so that the compression spring forms a two-section bending structure, the distance between the swinging end and the connecting end in the contact separation direction of the moving contact and the stationary contact is increased, and the distance between the swinging end and the second moving spring is also increased. Even if the second moving spring is deformed to be raised toward one side of the armature assembly, the end of the second moving spring is not easy to push the pusher, thereby avoiding the accidental disconnection of the moving contact and the stationary contact of the relay.

[0045] Further, part of the plurality of leaf springs between the first contact group and the second contact group has a bending part, and another part of the plurality of leaf springs is not provided with a bending part. On the one hand, the bending part can be used as a rotating fulcrum of the moving spring, and the movable end of the moving spring is deformed smoothly. On the other hand, the leaf spring with the bending part increases the flexibility of the overall moving spring, and the leaf spring without the bending part can increase the rigidity of the overall moving spring, thereby ensuring that the movable end of the moving spring deforms smoothly, avoiding that the deformation amount of the moving spring is too large due to the attraction between the two moving springs, and further avoiding that the end of the moving spring is easily raised to push the pusher.

[0046] Further, a part of the first magnetic conductor is designed as a second positioning part, the second positioning part is positioned and matched with the first positioning part of the second shell, so that the first contact assembly is positioned in the shell without additional parts with positioning function or the end of the lead terminal is shaped as a positioning part. Therefore, the first magnetic conductor of the embodiment of the application not only plays a role of anti-short circuit, but also plays a positioning role, one part has multiple functions, the number of parts required by the relay is reduced, the design and manufacturing process is simplified, and the production efficiency is improved.

[0047] Further, the bending part of each of the first and second moving spring plates protrudes towards the other. Compared with protruding outward, the bending part of each moving spring plate protrudes inward, effectively utilizing the space between the first and second moving spring plates and avoiding occupying too much space.

[0048] Further, the swing center of the armature assembly is linearly arranged with the two driving ends, when the armature assembly rotates to a horizontal position (i.e. the line connecting the two driving ends is parallel to the X-axis direction), the swing center of the armature assembly is linearly arranged with the two driving ends and parallel to the X-axis, so that when the armature assembly is rotated to a position or reversely rotated to a position, the driving end at this time is on the same straight line with the driving end when the armature assembly is in the horizontal position, the movement amount of the driving end relative to the pushing piece in the X-axis direction is smaller, so that the pushing piece is prevented from excessively swinging in the X-axis direction, thereby ensuring the stability of the position of the second moving magnetic conductor in the X-axis direction and avoiding affecting the anti-short circuit capability due to the reduction of the magnetic area of the second magnetic conductor and the first magnetic conductor.

[0049] Further, the movable ends of the two contact assemblies are arranged on the same side of the fixed ends corresponding to the movable ends in the two contact assemblies, and the movable ends of the two contact assemblies are driven by the same driving part to switch the two contact assemblies from the closed state to the open state and from the open state to the closed state, so that the movement space required by the movable ends of the two contact assemblies when closing or separating is located on the same side of the fixed ends of the two contact assemblies, so that only enough space needs to be reserved on one side of the fixed ends of the two contact assemblies, without reserving space on both sides of the fixed ends of the two contact assemblies, so that the structure of the two contact assemblies and the driving part is designed more compact in the driving direction, thereby significantly reducing the size of the two contact assemblies occupying the internal space of the relay, which is beneficial to the miniaturization design of the product. BRIEF DESCRIPTION OF DRAWINGS

[0050] The accompanying drawings, which are incorporated herein and constitute part of the specification, illustrate embodiments consistent with the application and, together with the description, further serve to explain the principles of the application. It is to be understood that the drawings are only schematic, and that they do not purport to be to scale with respect to one another. The embodiments presented herein are by way of example and are not limited with respect to the size, shape, composition of materials, or manner of execution of parts, except as variably set forth herein.

[0051] Figure 1 Fig. 1 shows a perspective view of a relay according to a first embodiment of the application.

[0052] Figure 2 Fig. 2 shows an exploded view of the relay according to the first embodiment of the application.

[0053] Figure 3 Fig. 3 shows a view of the relay according to the first embodiment of the application in a closed state.

[0054] Figure 4 Fig. 4 shows a view of the relay according to the first embodiment of the application in an open state.

[0055] Figure 5 Fig. 5 shows a partial view of the relay according to the first embodiment of the application. Figure 4

[0056] Figure 6 Fig. 6 shows a view of the second magnetic conductor and the pusher assembled in the relay according to the first embodiment of the application. Figure 4

[0057] Fig. 7 shows a view of the first moving spring plate and the second moving spring plate arranged in parallel. Figure 7

[0058] Fig. 8 shows a view of the second moving spring plate subjected to an ampere force in the relay according to the first embodiment of the application. Figure 8

[0059] Fig. 9 shows a view of the relay according to a second embodiment of the application. Figure 9

[0060] Fig. 10 shows a perspective view of the driving portion and the contact portion of the relay according to the second embodiment of the application assembled, wherein the short-circuit prevention structure is omitted. Figure 10

[0061] Fig. 11 shows a view of the contact portion of the relay according to the second embodiment of the application in a closed state, wherein the short-circuit prevention structure is omitted. Figure 11

[0062] Fig. 12 shows a view of the contact portion of the relay according to the second embodiment of the application in an open state, wherein the short-circuit prevention structure is omitted. Figure 12

[0063] Fig. 13 shows a view of the contact portion of the relay according to the second embodiment of the application in an open state, wherein the short-circuit prevention structure is omitted.​Figure 13 Fig. 1 shows a schematic view of a magnetic circuit of a relay according to the first embodiment of the present application. Figure 10 Fig. 2 shows a schematic view of a magnetic circuit of a relay according to the first embodiment of the present application.

[0064] Figure 14 Fig. 3 shows a schematic view of a magnetic circuit of a relay according to the second embodiment of the present application.

[0065] Figure 15 Fig. 4 shows a schematic view of a magnetic circuit of a relay according to the second embodiment of the present application. Figure 14 Fig. 5 shows a schematic view of a magnetic circuit of a relay according to the second embodiment of the present application.

[0066] Figure 16 Fig. 6 shows a schematic view of a magnetic circuit of a relay according to the second embodiment of the present application.

[0067] Figure 17 Fig. 7 shows a schematic view of a magnetic circuit of a relay according to the second embodiment of the present application.

[0068] Figure 18 Fig. 8 shows a schematic view of a magnetic circuit of a relay according to the second embodiment of the present application.

[0069] Figure 19 Fig. 9 shows a schematic view of a magnetic circuit of a relay according to the second embodiment of the present application.

[0070] Figure 20 Fig. 10 shows a schematic view of a magnetic circuit of a relay according to the second embodiment of the present application.

[0071] In the drawings, the following reference numerals are used: 100, housing; 110, first housing; 120, second housing; 121, first positioning portion; 130, fixing member; 200, contact portion; 210, first contact assembly; 211, first moving spring; 2111, first fixed end; 2112, first movable end; 2113, first curved section; 2114, first notch; 212, first stationary contact; 213, first moving contact; 214, first lead terminal; 220, second contact assembly; 221, second moving spring; 2211, second fixed end; 2212, second movable end; 2213, second curved section; 2214, second notch; 2215, limiting groove; 2215a, groove wall; 222, second moving contact; 223, second stationary contact; 224, second lead terminal; 230a, first compression spring; 230b, second compression spring; 231, connecting end; 232, swinging end; 2321, limiting portion; 2322, third deformation section; 2323, fourth deformation section; 2324, first deformation section; 2325, second deformation section; 240, leaf spring; 241, curved portion; 251, first contact group; 252, second contact group; 300, driving portion; 310a, armature assembly; 310b, push member; 311, first armature; 3111, first attraction portion; 3112, second attraction portion; 312, second armature; 3121, third attraction portion; 3122, fourth attraction portion; 313, first permanent magnet; 314, second permanent magnet; 315, encapsulation; 3151, driving arm; 316, first magnetic pole; 317, second magnetic pole; 318, driving end; 320, coil assembly; 321, coil holder; 322, coil winding; 323, core; 324, first yoke; 3241, first magnetic driving end; 325, second yoke; 3251, second magnetic driving end; 326, signal input terminal; 400, anti-short structure; 410, first magnetic conductor; 411, second positioning portion; 420, second magnetic conductor; 500, conductive member; 510, first conductive member; 520, second conductive member. DETAILED DESCRIPTION

[0072] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and thus description of the same will be simplified or omitted.

[0073] It is to be understood that the terms "including", "comprising", "having" and variations thereof herein are intended to cover the case where non-excluded items are included, as well as the case where excluded items are not included. For example, a process, method, system, product, or apparatus that comprises a list of steps or units are not necessarily limited to the listed steps or units but can include additional steps or units not expressly listed or can also include steps or units inherent in such process, method, system, product, or apparatus.

[0074] First embodiment

[0075] As shown in FIGS. 1A and 1B, the present embodiment provides a relay, which can be a latching relay, but is not limited thereto. The relay includes a housing 100, a contact portion 200, and a driving portion 300, which are disposed in the housing 100. The contact portion 200 has a closed state and an open state, and the driving portion 300 is configured to drive the contact portion 200 to switch from the closed state to the open state and from the open state to the closed state in response to an input signal. Figure 1 Figure 2 In an embodiment, as shown in FIGS. 2A and 2B, the present embodiment provides a relay, which can be a latching relay, but is not limited thereto. The relay includes a housing 100, a contact portion 200, and a driving portion 300, which are disposed in the housing 100. The contact portion 200 has a closed state and an open state, and the driving portion 300 is configured to drive the contact portion 200 to switch from the closed state to the open state and from the open state to the closed state in response to an input signal.

[0076] In an embodiment, as shown in FIGS. 3A and 3B, the present embodiment provides a relay, which can be a latching relay, but is not limited thereto. The relay includes a housing 100, a contact portion 200, and a driving portion 300, which are disposed in the housing 100. The contact portion 200 has a closed state and an open state, and the driving portion 300 is configured to drive the contact portion 200 to switch from the closed state to the open state and from the open state to the closed state in response to an input signal. Figure 2 ​As shown, the housing 100 can include a first shell 110 and a second shell 120, which are connected together and form a hollow chamber for accommodating the contact portion 200 and the driving portion 300. The shape of the first shell 110 and the second shell 120 after being connected can have various embodiments, for example, in the embodiment of the present application, the shape of the first shell 110 and the second shell 120 after being connected is a hollow cuboid. Of course, in other embodiments, the shape of the first shell 110 and the second shell 120 after being connected can also be a hollow cylinder, or other suitable shapes.

[0077] As an example, the second shell 120 is a cuboid shape with an opening, and the contact portion 200 and the driving portion 300 are arranged in the second shell 120 through the opening of the second shell 120. The first shell 110 is plate-shaped, and the first shell 110 is buckled to the opening of the second shell 120 to form a hollow cuboid.

[0078] Of course, in other embodiments, the first shell 110 and the second shell 120 are both cuboid-shaped and have openings in one face, the opening of the first shell 110 is arranged opposite to the opening of the second shell 120, and the first shell 110 and the second shell 120 are buckled to form a hollow chamber for accommodating the contact portion 200 and the driving portion 300.

[0079] As shown, Figure 3 the contact portion 200 includes two contact assemblies, one of which includes a static contact, and the other of which has a moving spring piece and a moving contact, one end of the moving spring piece is fixed in position relative to the static contact, the position fixing including both complete fixing and rotating around a fixed axis, the other end is swingable; the moving contact is arranged on the moving spring piece. The driving portion 300 is connected with the moving spring piece for driving the moving spring piece to swing, so that the moving contact contacts or separates from the static contact.

[0080] As shown, Figure 3 and Figure 4 the relay further includes an anti-short circuit structure 400, the anti-short circuit structure 400 includes a first magnetic conductor 410 and a second magnetic conductor 420, the second magnetic conductor 420 is arranged in the driving portion 300. The first magnetic conductor 410 and the second magnetic conductor 420 are configured to be magnetized and attracted to each other when the contact portion 200 is energized, and at least exert a pressure on the part of the driving portion 300 for driving the moving spring piece to swing towards the static contact.

[0081] In the relay of this application embodiment, when a short-circuit current passes through the contact portion 200, a magnetic attraction force can be generated between the first magnetic conductor 410 and the second magnetic conductor 420 along the contact pressure direction. This magnetic attraction force acts on the drive portion 300 and maintains the stability of the drive portion 300, thereby enabling the moving reed to resist the electrodynamic repulsion force generated between the moving and stationary contacts due to the short-circuit current, thereby preventing the moving and stationary contacts from momentarily disconnecting.

[0082] Furthermore, since the second magnetic conductor 420 is not mounted on the moving reed, the moving reed is prevented from deforming under magnetic attraction, thus avoiding the driving part 300 from being pushed back by the driving force and causing the driving part 300 to move in the direction of contact disconnection, thereby preventing the moving and stationary contacts from disconnecting and the relay from failing. Simultaneously, because the second magnetic conductor 420 is not mounted on the moving reed, even if the first magnetic conductor and the second magnetic conductor 420 attract each other, the moving reed will not conduct through the first and second magnetic conductors 420 to the contact assembly with the stationary contact, ensuring that the two contact assemblies only contact through the moving and stationary contacts, guaranteeing good contact performance between the two contact assemblies. Furthermore, since the second magnetic conductor 420 is disposed on the driving part 300 and not on the moving spring, it does not increase the weight of the moving spring, and thus does not increase the kinetic energy of the moving spring during movement. This ensures the stability of the moving and stationary contacts during contact, avoiding excessive vibration and bounce of the moving and stationary contacts, and preventing repeated arcing of the moving and stationary contacts, which would affect their service life. In addition, since the contact or disconnection of the moving spring with the stationary contact depends on its own elastic deformation ability, if the second magnetic conductor 420 is directly disposed on the moving spring, the rigidity of the moving spring will increase due to the large rigidity and usually large area of ​​the second magnetic conductor 420. This would require a larger driving force or, in the absence of sufficient driving force, the moving spring would easily malfunction in the closing or opening direction. Therefore, in this embodiment, the second magnetic conductor 420 is not disposed on the moving spring, which also avoids affecting the flexibility of the moving spring, reducing the increase in energy consumption, and preventing relay malfunction.

[0083] like Figure 3 As shown, the drive section 300 includes a pusher 310b connected to a moving spring. A second magnetic conductor 420 is mounted on the pusher 310b. When the moving contact and the stationary contact are not in contact, the second magnetic conductor 420 is fixed relative to the pusher 310b.

[0084] In the embodiment, the moving contact and the stationary contact are in the non-contact state, that is, during the movement of the driving portion 300 driving the moving spring, the second magnetic conductor 420 is stable relative to the position of the pushing member 310b. Compared with the scheme that the second magnetic conductor 420 is movable relative to the pushing member 310b when the moving contact and the stationary contact are in the non-contact state, the embodiment has at least the following advantages: 1. When the moving contact and the stationary contact are in contact, the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 is stable and always meets the expected demand, and the short-circuit resistance effect is more reliable; 2. The second magnetic conductor 420 and the pushing member 310b do not have relative displacement and generate friction, thereby avoiding increasing the pull-in voltage and release voltage of the relay; 3. The amount of wear debris of the pushing member 310b is reduced, thereby prolonging the service life of the relay.

[0085] In an embodiment, the pushing member 310b moves linearly or approaches linear motion.

[0086] In the embodiment, compared with the scheme that the second magnetic conductor 420 is directly mounted on the moving spring, since the pushing member 310b moves linearly or approaches linear motion, the second magnetic conductor 420 is mounted on the pushing member 310b, which is beneficial to avoid the inclination of the second magnetic conductor 420, thereby avoiding the uneven distribution of the magnetic gap between the first magnetic conductor 410 and the second magnetic conductor 420, and weakening the magnetic attraction force and the short-circuit resistance capability.

[0087] In an embodiment, when the moving contact and the stationary contact are in the contact state, the second magnetic conductor 420 is configured to move towards the first magnetic conductor 410 when the current value flowing through the contact portion 200 is greater than or equal to a threshold value, so as to reduce the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410.

[0088] It should be noted that when the current value flowing through the contact portion 200 is constant, the attraction force between the second magnetic conductor 420 and the first magnetic conductor 410 is inversely proportional to the size of the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410, that is, the smaller the magnetic gap, the greater the attraction force; the larger the magnetic gap, the smaller the attraction force.

[0089] If the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 needs to be designed to be smaller in order to improve the short-circuit resistance capability, thereby increasing the attraction force between the second magnetic conductor 420 and the first magnetic conductor 410, but the overload breaking capability will be reduced.

[0090] If the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 is not designed to be too small in order to improve the overload breaking capability, but the short-circuit resistance capability will be affected.

[0091] Therefore, it can be seen that when the contact part 200 is in the closed state, and the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 is a fixed value, it is impossible to simultaneously ensure short-circuit resistance and overload breaking capacity.

[0092] In the embodiments of this application, when the contact portion 200 is in a closed state, the second magnetic conductor 420 can reduce the magnetic gap between itself and the first magnetic conductor 410 based on whether the current value flowing through the contact portion 200 is greater than or equal to a threshold. In this way, based on the magnitude of the current value flowing through the contact portion 200, the size of the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 can be adjusted to balance short-circuit resistance and overload breaking capacity.

[0093] For example, when the relay is in normal working condition and no short circuit occurs, the current flowing through the contact part 200 is less than the threshold, for example, less than 2000A. At this time, the current value is small, and the relay needs to have a high overload breaking capacity in this state.

[0094] When a short circuit occurs in the external circuit, the current flowing through the contact portion 200 is greater than or equal to a threshold, for example, greater than or equal to 2000A. At this time, the current value is relatively large. In this state, the second magnetic conductor 420 moves towards the first magnetic conductor 410 to reduce the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410, so as to ensure that the relay has a high short-circuit resistance capability.

[0095] like Figure 2 and Figure 3 As shown, the drive section 300 also includes a movable component, which is configured to move and drive the pusher 310b to move when subjected to an external force, so that the contact section 200 switches between a closed state and an open state. The movable component and the pusher 310b are clearance-fitted along the movement direction of the pusher 310b to provide movement space for the pusher 310b. The second magnetic conductor 420 is fixed to the pusher 310b. Based on this, when the contact section 200 is in the closed state and the current value flowing through the contact section 200 is greater than or equal to a threshold, the magnetic attraction between the first magnetic conductor 410 and the second magnetic conductor 420 increases. Since there is a clearance between the pusher 310b and the movable component, the pusher 310b can move toward the side where the first magnetic conductor 410 is located, thereby reducing the magnetic gap size between the second magnetic conductor 420 and the first magnetic conductor 410 and ensuring that the relay has a high short-circuit withstand capability.

[0096] In addition, the movable part and the pusher 310b are in clearance fit along the moving direction of the pusher 310b, which reduces the degree of influence of the moving mode of the movable part on the pusher 310b. For example, the movable part is designed to rotate based on requirements, but the pusher 310b can be arranged to move linearly or nearly linearly driven by the movable part. On this basis, the second magnetic conductor 420 is installed on the pusher 310b, which is conducive to avoiding the inclination of the second magnetic conductor 420, thereby avoiding the uneven distribution of the magnetic gap between the first magnetic conductor 410 and the second magnetic conductor 420, and weakening the magnetic attraction force and the short-circuit resistance.

[0097] In an embodiment, the pusher 310b and the second magnetic conductor 420 are connected by integral injection molding.

[0098] In an embodiment, the movable part is an armature assembly 310a capable of being driven by magnetic force, one end of the pusher 310b is in clearance fit with the armature assembly 310a, and the other end is connected with the moving spring piece.

[0099] In an embodiment, the driving part 300 further includes a coil assembly 320. The armature assembly 310a is movably arranged in the second housing 120 and connected with the contact part 200 through the pusher 310b, for driving the contact part 200 to switch between the closed state and the open state. The coil assembly 320 is fixedly arranged in the second housing 120 and electromagnetically coupled with the armature assembly 310a. The coil assembly 320 is configured to drive the armature assembly 310a to move in response to an input signal.

[0100] It is worth mentioning that the driving part 300 of the present application is not limited to including the armature assembly 310a and the coil assembly 320. For example, in other embodiments, the driving part 300 can include a motor, and the motor drives the contact part 200 to switch between the closed state and the open state through the movable part. At this time, the movable part is a transmission assembly capable of receiving the driving force of the motor.

[0101] Next, the driving part 300 including the armature assembly 310a, the coil assembly 320 and the pusher 310b is taken as an example for description.

[0102] In an embodiment, the number of the contact portions 200 is two, and the two contact portions 200 are respectively a first contact portion and a second contact portion; the static contact, the movable spring and the movable contact in the first contact portion are respectively a first static contact 212, a second movable spring 221 and a second movable contact 222; the static contact, the movable spring and the movable contact in the second contact portion are respectively a second static contact 223, a first movable spring 211 and a first movable contact 213; the two ends of the first movable spring 211 are respectively a first fixed end 2111 and a first movable end 2112, and the first movable contact 213 is arranged close to the first movable end 2112; the first static contact 212 is electrically connected with the first fixed end 2111; the two ends of the second movable spring 221 are respectively a second fixed end 2211 and a second movable end 2212, and the second movable contact 222 is arranged close to the second movable end 2212; the second static contact 223 is electrically connected with the second fixed end 2211.

[0103] Each contact portion 200 further comprises a lead terminal, and the lead terminal comprised by the first contact portion is defined as a first lead terminal 214, and the lead terminal comprised by the second contact portion is defined as a second lead terminal 224.

[0104] For the convenience of description, the first static contact 212, the first movable spring 211, the first movable contact 213 and the first lead terminal 214 constitute a first contact unit 210; and the second static contact 223, the second movable spring 221, the second movable contact 222 and the second lead terminal 224 constitute a second contact unit 220.

[0105] In an embodiment, the first lead terminal 214 is arranged on the second housing 120 and partially extends out of the outer surface of the second housing 120. The first fixed end 2111 of the first movable spring 211 is connected with the first lead terminal 214, and the position of the first fixed end 2111 of the first movable spring 211 is fixedly arranged, and the first movable end 2112 of the first movable spring 211 is swingable.

[0106] In an embodiment, the first static contact 212 connects the first movable spring 211 and the first lead terminal 214 by riveting, but is not limited thereto.

[0107] The second movable spring 221 is arranged side by side with the first movable spring 211 along the Y-axis direction, and the second movable spring 221 is closer to the driving portion 300. The second lead terminal 224 is arranged on the second housing 120 and partially extends out of the outer surface of the second housing 120. The second fixed end 2211 of the second movable spring 221 is connected with the second lead terminal 224, and the second static contact 223 is arranged on the second fixed end 2211 of the second movable spring 221. The second fixed end 2211 of the second movable spring 221 is fixedly arranged, and the second movable end 2212 of the second movable spring 221 is swingable.

[0108] In one embodiment, the second stationary contact 223 connects the second moving spring 221 and the second lead-out terminal 224 by riveting, but this is not a limitation.

[0109] The first movable spring 211, with one end having the first movable contact 213, and the second movable spring 221, with one end having the second movable contact 222, are respectively connected to two pushers 310b. The two pushers 310b are used to simultaneously drive the first movable spring 211 and the second movable spring 221 to move, so that the second movable contact 222 is in contact with the first stationary contact 212 and the first movable contact 213 is in contact with the second stationary contact 223, or the second movable contact 222 is separated from the first stationary contact 212 and the first movable contact 213 is separated from the second stationary contact 223.

[0110] In this embodiment, when both contact portions 200 are in the closed state, the first moving contact 213 contacts the second stationary contact 223, and the second moving contact 222 contacts the first stationary contact 212. At this time, the first moving spring 211 and the second moving spring 221 form a parallel circuit structure. When the contact portion 200 is in the open state, the first moving contact 213 separates from the second stationary contact 223, and the second moving contact 222 separates from the first stationary contact 212.

[0111] In one embodiment, the driving portion 300 and the contact portion 200 are along the contact separation direction of the corresponding stationary contact and the moving contact (in this application, this direction refers to the normal at the contact position of the corresponding stationary contact, which can be referred to in this embodiment). Figure 3 (Layout along the Y-axis).

[0112] like Figure 4 As shown, the armature assembly 310a has two drive arms 3151, the ends of which are drive ends 318. One end of each of the two pushers 310b is movably connected to the two drive ends 318, and the other end of each of the two pushers 310b is connected to the end of the first moving spring 211 away from the first lead-out terminal 214 and the end of the second moving spring 221 away from the second lead-out terminal 224, respectively.

[0113] The relay also includes a fixing member 130, which is disposed within the housing 100 and fixedly connected to the second housing 120. The armature assembly 310a is pivotally connected to the fixing member 130 and is used to drive the two pushers 310b to reciprocate, thereby switching the contact portion 200 from a closed state to an open state and from an open state to a closed state.

[0114] like Figure 4As shown, the coil assembly 320 includes a coil frame 321, a coil winding 322, a core 323, and two yokes (324, 325). The coil winding 322 is wound around the outer periphery of the coil frame 321, the core 323 is disposed in the coil frame 321 and surrounded by the coil winding 322, and the two yokes (324, 325) are respectively fixed to the axial ends of the core 323, and one end of each of the two yokes (324, 325) extends to the same side of the coil assembly 320 and forms a magnetic driving end (3241, 3251) for electromagnetic coupling with the armature assembly 310a.

[0115] As shown in the embodiment, the oscillation center O of the armature assembly 310a is linearly arranged with the two driving ends 318. Figure 4

[0116] In the embodiment, the oscillation center O of the armature assembly 310a is linearly arranged with the two driving ends 318. When the armature assembly 310a rotates to the horizontal position (i.e., the line connecting the two driving ends 318 is parallel to the X-axis direction), the oscillation center O of the armature assembly 310a is linearly arranged with the two driving ends 318 and parallel to the X-axis. Thus, after the armature assembly 310a is rotated to the position, the driving end 318 at this time is on the same straight line as the driving end 318 when the armature assembly 310a is in the horizontal position. When the driving end 318 pushes the pusher 310b to move, the movement component of the driving end 318 relative to the pusher 310b in the X-axis direction is smaller, thereby avoiding excessive deflection of the pusher 310b in the X-axis direction, and ensuring the stability of the position of the second moving magnetic conductor in the X-axis direction, and avoiding the reduction of the magnetic conduction area of the second magnetic conductor 420 and the first magnetic conductor 410, which affects the short-circuit resistance.

[0117] As shown in the embodiment, the oscillation center O of the armature assembly 310a is linearly arranged with the two driving ends 318. Figure 3 Figure 4 As shown in the embodiment, the second moving contact 222 and the first stationary contact 212 form a first contact group 251, and the first moving contact 213 and the second stationary contact 223 form a second contact group 252. At least one of the first contact group 251 and the second contact group 252 is provided with the short-circuit resistance structure 400.

[0118] For example, the first contact group 251 is provided with the short-circuit resistance structure 400, and the second contact group 252 is not provided with the short-circuit resistance structure 400; or the second contact group 252 is provided with the short-circuit resistance structure 400, and the first contact group 251 is not provided with the short-circuit resistance structure 400; or the first contact group 251 and the second contact group 252 are respectively provided with the short-circuit resistance structure 400.

[0119] In an embodiment, the first magnetic conductor 410 is fixedly arranged on the housing 100 or the contact assembly having the stationary contact.​​

[0120] In one embodiment, when the anti-short structure 400 is provided near the first contact group 251, the first magnetic conductor 410 of the corresponding anti-short structure 400 is fixedly mounted on the housing 100 or the first contact unit 210 relative to the first stationary contact 212.

[0121] When the anti-short structure 400 is provided near the second contact group 252, the first magnetic conductor 410 of the corresponding anti-short structure 400 is fixedly mounted on the housing 100 or the second contact unit 220 relative to the second stationary contact 223.

[0122] For example, when the first contact group 251 is provided with the anti-short structure 400, the first magnetic conductor 410 of the anti-short structure 400 is fixedly mounted on the side surface of the first lead terminal 214 opposite to the second movable contact 222.

[0123] When the second contact group 252 is provided with the anti-short structure 400, the first magnetic conductor 410 of the anti-short structure 400 is fixedly mounted on the side surface of the second lead terminal 224 opposite to the first movable contact 213.

[0124] In another embodiment, the first magnetic conductor 410 is movably mounted on the housing 100 or the contact assembly having the stationary contact relative to the stationary contact. When the movable contact and the stationary contact are in the non-contact state and the current value of the contact portion is less than a threshold value, the first magnetic conductor 410 is biased in the closing direction of the movable contact relative to the contact assembly having the stationary contact or the housing 100 based on the elastic force or the magnetic force. When the movable contact and the stationary contact are in the contact state and the current value of the contact portion is greater than or equal to the threshold value, the first magnetic conductor 410 is moved against the elastic force or the magnetic force to reduce the magnetic gap between the first magnetic conductor 410 and the second magnetic conductor 420.

[0125] In this embodiment, when the contact portion 200 is in the closed state, the first magnetic conductor 410 can reduce the magnetic gap between the first magnetic conductor 410 and the second magnetic conductor 420 according to whether the current value flowing through the contact portion 200 is greater than or equal to the threshold value. Thus, the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 can be adjusted based on the current value flowing through the contact portion 200 to balance the anti-short capability and the overload breaking capability.

[0126] In a specific embodiment, when the anti-short-circuit structure 400 is arranged near the first contact group 251, the first magnetic conductor 410 of the corresponding anti-short-circuit structure 400 is movably mounted on the housing 100 or the first lead terminal 214 relative to the first stationary contact 212. When the first stationary contact 212 and the second movable contact 222 are in the non-contact state, and the first stationary contact 212 and the second movable contact 222 are in the contact state and the current value of the contact portion 200 is less than the threshold value, the first magnetic conductor 410 is held against the first lead terminal 214 or the housing 100 in the closing direction of the second movable contact 222 based on the elastic action or the magnetic force action; when the first stationary contact 212 and the second movable contact 222 are in the contact state and the current value of the contact portion 200 is greater than or equal to the threshold value, the first magnetic conductor 410 moves in the direction close to the second magnetic conductor 420 to reduce the magnetic gap between the first magnetic conductor 410 and the second magnetic conductor 420 by overcoming the elastic action or the magnetic force action.

[0127] When the anti-short-circuit structure 400 is arranged near the second contact group 252, the first magnetic conductor 410 of the corresponding anti-short-circuit structure 400 is movably mounted on the housing 100 or the second lead terminal 224 relative to the second stationary contact 223. When the first movable contact 213 and the second stationary contact 223 are in the non-contact state, and the first movable contact 213 and the second stationary contact 223 are in the contact state and the current value of the contact portion 200 is less than the threshold value, the first magnetic conductor 410 is held against the second lead terminal 224 or the housing 100 in the closing direction of the first movable contact 213 based on the elastic action or the magnetic force action; when the first movable contact 213 and the second stationary contact 223 are in the contact state and the current value of the contact portion 200 is greater than or equal to the threshold value, the first magnetic conductor 410 moves in the direction close to the second magnetic conductor 420 to reduce the magnetic gap between the first magnetic conductor 410 and the second magnetic conductor 420 by overcoming the elastic action or the magnetic force action.

[0128] Wherein, the "closing direction" refers to the direction in which the second movable contact 222 moves close to the first stationary contact 212 and the direction in which the first movable contact 213 moves close to the second stationary contact 223.

[0129] Reference Figures 2-9 The embodiment mainly takes the example of arranging the anti-short-circuit structure 400 near the first contact group 251 for illustration, and the case of arranging the anti-short-circuit structure 400 near the second contact group 252 can refer to the example.

[0130] It is worth noting that the first magnetic conductor 410 can be located on the side of the first lead-out terminal 214 facing away from the second moving contact 222, or it can be located on the side of the first lead-out terminal 214 facing the second moving contact 222. When the first magnetic conductor 410 is located on the side of the first lead-out terminal 214 facing away from the second moving contact 222, the second magnetic conductor 420 can be located on either the side of the moving spring facing or away from the first stationary contact 212; when the first magnetic conductor 410 is located on the side of the first lead-out terminal 214 facing the second moving contact 222, the second magnetic conductor 420 must be located on the side of the moving spring facing away from the first stationary contact 212, so as to ensure that there is at least one conductor component capable of carrying current between the first magnetic conductor 410 and the second magnetic conductor 420, so as to ensure that the first magnetic conductor 410 and the second magnetic conductor 420 can form a magnetic attraction force based on the magnetic field generated when the conductor component carries current.

[0131] In one embodiment, the first magnetic conductor 410 and the second magnetic conductor 420 can be in the shape of a line, a U-shape, or an L-shape. The first magnetic conductor 410 and the second magnetic conductor 420 can be made of soft magnetic materials such as iron, cobalt, nickel, and their alloys. This application does not make any special limitation in this regard.

[0132] like Figure 3 and Figure 4 As shown, the first lead-out terminal 214 is located on the side of the first moving spring 211 facing away from the second moving contact 222, and the first magnetic conductor 410 is fixedly connected to the surface of the first lead-out terminal 214 facing away from the second moving contact 222, that is, the first magnetic conductor 410 is fixedly connected to the first contact unit 210.

[0133] Furthermore, the first stationary contact 212 connects the first lead-out terminal 214, the first moving spring 211, and the first magnetic conductor 410 by riveting.

[0134] In the embodiments of this application, since the first stationary contact 212 connects the first lead-out terminal 214, the first moving spring 211 and the first magnetic conductor 410, the first magnetic conductor 410 can be assembled together when assembling the first stationary contact 212, the first lead-out terminal 214 and the first moving spring 211, thereby improving the assembly efficiency of the first magnetic conductor 410 and the first contact unit 210.

[0135] Of course, in other embodiments, the first magnetic conductor 410 may also be fixed to the outer shell 100. For example, the first magnetic conductor 410 may be fixed inside the second shell 120 or inside the first shell 110.

[0136] In an embodiment, the second magnetic conductor 420 is located on the side of the moving contact blade facing the stationary contact. That is, the second magnetic conductor 420 is located between the first contact unit 210 and the second contact unit 220. In this way, the distance between the second magnetic conductor 420 and the first magnetic conductor 410 is closer, the magnetic resistance is smaller, the magnetic attraction is greater, the volume of the second magnetic conductor 420 and / or the first magnetic conductor 410 is reduced, and the cost is saved. In addition, when the driving part 300 includes the coil assembly 320, the second magnetic conductor 420 is away from the coil assembly 320, thereby avoiding the second magnetic conductor 420 affecting the magnetic field line distribution of the coil assembly 320.

[0137] It should be noted that a component allowing current to pass through needs to be provided between the second magnetic conductor 420 and the first magnetic conductor 410 to ensure that a magnetic circuit can be formed between the second magnetic conductor 420 and the first magnetic conductor 410.

[0138] Please continue to refer to Figure 3 and Figure 4 The second housing 120 is provided with a first positioning part 121. The first magnetic conductor 410 has a second positioning part 411, which is positioned and matched with the first positioning part 121 and is limited and matched in the direction of contact separation between the moving contact and the stationary contact.

[0139] It should be noted that in the prior art, a positioning part is usually formed at one end of the lead terminal, or an additional part having a positioning part is provided and connected with the lead terminal, and the positioning part is positioned and matched with the shell to realize the positioning of the contact assembly in the shell.

[0140] In the embodiments of the present application, a part of the first magnetic conductor 410 is designed as the second positioning part 411, which is positioned and matched with the first positioning part 121 of the second housing 120, so that the first contact unit 210 can be positioned in the shell 100 without the need for additionally providing a part having a positioning function or forming a positioning part at one end of the lead terminal.

[0141] Therefore, the first magnetic conductor 410 of the embodiments of the present application not only plays a role in resisting short circuit, but also plays a role in positioning and limiting the stationary contact and the lead terminal, one part has multiple functions, the number of parts required by the relay is reduced, the design and manufacturing process is simplified, and the production efficiency is improved.

[0142] In an embodiment, one end of the first magnetic conductor 410 is bent to form the second positioning part 411 away from the side of the second magnetic conductor 420 to avoid the first moving contact blade 211 connected with the first lead terminal 214, but this is not limited.

[0143] In an embodiment, the first positioning part 121 is a groove, and the second positioning part 411 is positioned in the groove.

[0144] Of course, the structure in the second housing 120 that is positioned and matched with the second positioning part 411 is not limited to the groove, for example, in other embodiments, the first positioning part 121 can also be a positioning hole, a positioning protrusion, etc.

[0145] In an embodiment, the contact portion 200 is in a closed state, that is, the second movable contact 222 is in contact with the first fixed contact 212, and the first movable contact 213 is in contact with the second fixed contact 223.

[0146] As shown in FIG. 6, one end of the pusher 310b is movably connected with the armature assembly 310a, for example, clearance fit, and the other end of the pusher 310b is connected with the second movable spring 221; the second magnetic conductor 420 is fixedly connected with the pusher 310b. Figure 4

[0147] In the embodiment of the present application, by designing one end of the pusher 310b to be clearance fit with the armature assembly 310a, the clearance allows the pusher 310b to be movable relative to the armature assembly 310a, in the closed state, when the current value flowing through the contact portion 200 is greater than or equal to the threshold value, with the increase of the magnetic attraction force between the second magnetic conductor 420 and the first magnetic conductor 410, the pusher 310b and the second magnetic conductor 420 move close to the first magnetic conductor 410 until the pusher 310b is limited by the armature assembly 310b and cannot continue to move, at this time, the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 is reduced, the attraction force between the second magnetic conductor 420 and the first magnetic conductor 410 is increased, thereby improving the short circuit resistance.

[0148] As a variant embodiment, in order to achieve the effect that the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 is variable, the contact portion 200 can also be designed as: The second magnetic conductor 420 is movably arranged on the pusher 310b along the moving direction of the pusher 310b; in the non-contact state of the movable contact and the fixed contact and when the current value of the contact portion is less than the threshold value in the contact state of the movable contact and the fixed contact, the second magnetic conductor 420 is held on the pusher 310b along the disconnecting direction of the movable contact based on the elastic action or the magnetic force action; when the current value of the contact portion is greater than or equal to the threshold value in the contact state of the movable contact and the fixed contact, the second magnetic conductor 420 moves in the direction of approaching the first magnetic conductor 410 to reduce the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 by overcoming the elastic action or the magnetic force action.

[0149] Wherein, the "disconnecting direction" refers to the direction in which the movable contact moves away from the fixed contact.

[0150] In a specific embodiment, as shown in FIG. 7, the second magnetic conductor 420 is movably arranged on the pusher 310b along the moving direction of the pusher 310b; in the non-contact state of the movable contact and the fixed contact and when the current value of the contact portion is less than the threshold value in the contact state of the movable contact and the fixed contact, the second magnetic conductor 420 is held on the pusher 310b along the disconnecting direction of the movable contact based on the elastic action or the magnetic force action; when the current value of the contact portion is greater than or equal to the threshold value in the contact state of the movable contact and the fixed contact, the second magnetic conductor 420 moves in the direction of approaching the first magnetic conductor 410 to reduce the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 by overcoming the elastic action or the magnetic force action. Figure 20 ​As shown, when an anti-short-circuit structure 400 is provided near the first contact group 251, the second magnetic conductor 420 of the corresponding anti-short-circuit structure 400 is movably mounted on the corresponding pusher 310b along the moving direction of the pusher 310b. When the first stationary contact 212 and the second moving contact 222 are in a non-contact state, and when the first stationary contact 212 and the second moving contact 222 are in contact and the current value of the contact portion 200 is less than a threshold, the second magnetic conductor 420 is held against the pusher 310b along the disconnection direction of the moving contact based on elastic or magnetic forces. When the first stationary contact 212 and the second moving contact 222 are in contact and the current value of the contact portion 200 is greater than or equal to a threshold, the second magnetic conductor 420 overcomes the elastic or magnetic forces and moves towards the first magnetic conductor 410 to reduce the magnetic gap between them.

[0151] When a short-circuit protection structure 400 is provided near the second contact group 252, the second magnetic conductor 420 of the corresponding short-circuit protection structure 400 is movably mounted on the corresponding pusher 310b along the moving direction of the pusher 310b. When the first moving contact 213 and the second stationary contact 223 are not in contact, and when the first moving contact 213 and the second stationary contact 223 are in contact and the current value of the contact portion 200 is less than a threshold, the second magnetic conductor 420 is held against the pusher 310b along the disconnection direction of the moving contact based on elastic or magnetic forces. When the first moving contact 213 and the second stationary contact 223 are in contact and the current value of the contact portion 200 is greater than or equal to a threshold, the second magnetic conductor 420 overcomes the elastic or magnetic forces and moves towards the first magnetic conductor 410 to reduce the magnetic gap between them.

[0152] In one embodiment, the contact assembly with the movable spring also includes a compression spring disposed between the movable spring and the pusher 310b. The compression spring is configured to store energy and provide contact pressure to the movable spring when the contact portion 200 is in a closed state.

[0153] like Figure 4 As shown, in this embodiment, the contact assembly with the first movable spring 211 further includes a first compression spring 230a, which is disposed between the first movable spring 211 and the corresponding pusher 310b. The first compression spring 230a is configured to store energy and provide contact pressure to the first movable spring 211 when the contact portion 200 is in the closed state. The contact assembly with the second movable spring 221 further includes a second compression spring 230b, which is disposed between the second movable spring 221 and the corresponding pusher 310b. The first compression spring 230a and the second compression spring 230b are configured to store energy and provide contact pressure to the second movable spring 221 when the contact portion 200 is in the closed state.

[0154] When the anti-short-circuit structure 400 is arranged near the first contact group, the second magnetic conductor 420 of the anti-short-circuit structure 400 is located on the side of the first compression spring 230a away from the first magnetic conductor 410, and the second magnetic conductor 420 is configured to be held against the pusher 310b by the elastic force of the first compression spring 230a, and is capable of moving relative to the pusher 310b towards the first magnetic conductor 410 when the current flowing through the contact portion 200 is greater than or equal to the threshold value, and pressing against the first compression spring 230a to increase the deformation of the compression spring.

[0155] Therefore, since the second magnetic conductor 420 is movably connected to the corresponding pusher 310b, when the short-circuit current flows through the contact portion 200, the second magnetic conductor 420 can press against the first compression spring 230a to overcome the elastic force of the first compression spring 230a, so that the first compression spring 230a produces a greater deformation, and the first compression spring 230a can provide greater contact pressure to prevent the first movable contact 213 from being instantaneously repelled due to the short-circuit current. In addition, the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 is reduced, and the attractive force between the second magnetic conductor 420 and the first magnetic conductor 410 is increased, further improving the anti-short-circuit capability.

[0156] When the anti-short-circuit structure 400 is arranged near the first contact group, the second magnetic conductor 420 of the anti-short-circuit structure 400 is located on the side of the second compression spring 230b away from the first magnetic conductor 410, and the second magnetic conductor 420 is configured to be held against the pusher 310b by the elastic force of the second compression spring 230b, and is capable of moving relative to the pusher 310b towards the first magnetic conductor 410 when the current flowing through the contact portion 200 is greater than or equal to the threshold value, and pressing against the second compression spring 230b to increase the deformation of the compression spring.

[0157] Therefore, since the second magnetic conductor 420 is movably connected to the corresponding pusher 310b, when the short-circuit current flows through the contact portion 200, the second magnetic conductor 420 can press against the second compression spring 230b to overcome the elastic force of the second compression spring 230b, so that the second compression spring 230b produces a greater deformation, and the second compression spring 230b can provide greater contact pressure to prevent the second movable contact 222 from being instantaneously repelled due to the short-circuit current. In addition, the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 is reduced, and the attractive force between the second magnetic conductor 420 and the first magnetic conductor 410 is increased, further improving the anti-short-circuit capability.

[0158] In an embodiment, the position at which the compression spring acts on the movable spring piece is located at the position of the movable contact, or the position at which the compression spring acts on the movable spring piece and the pusher 310b are both located between the fixed end of the movable spring piece and the movable contact or between the movable contact and the movable end of the movable spring piece.

[0159] In a specific embodiment, for the first contact unit 210, the position where the first compression spring 230a acts on the first movable spring piece 211 is located at the position of the first movable contact 213; or, the positions where the first compression spring 230a acts on the first movable spring piece 211 and the pusher 310b are both located between the fixed end of the first movable spring piece 211 and the first movable contact 213 or both located between the first movable contact 213 and the movable end of the first movable spring piece 211. Compared with the scheme where the acting points of the first compression spring 230a and the pusher 310b are respectively located on the two sides of the first movable contact 213, the embodiment can avoid that the first compression spring 230a acts on the first movable spring piece 211 to deform the first movable spring piece 211, thereby causing the first movable spring piece 211 to rotate with the contact position of the movable contact and the fixed contact as the fulcrum to push back the pusher 310b, ensuring the stability of the driving part 300 and avoiding the movable contact and the fixed contact from being blown open.

[0160] For the second contact unit 220, the position where the second compression spring 230b acts on the second movable spring piece 221 is located at the position of the second movable contact 222; or, the positions where the second compression spring 230b acts on the second movable spring piece 221 and the pusher 310b are both located between the fixed end of the second movable spring piece 221 and the second movable contact 222 or both located between the second movable contact 222 and the movable end of the second movable spring piece 221. Compared with the scheme where the acting points of the second compression spring 230b and the pusher 310b are respectively located on the two sides of the second movable contact 222, the embodiment can avoid that the second compression spring 230b acts on the second movable spring piece 221 to deform the second movable spring piece 221, thereby causing the second movable spring piece 221 to rotate with the contact position of the movable contact and the fixed contact as the fulcrum to push back the pusher 310b, ensuring the stability of the driving part 300 and avoiding the movable contact and the fixed contact from being blown open.

[0161] In an embodiment, the pusher 310b corresponding to the first movable spring piece 211 is limited in the moving range by the second contact unit 220 along the length direction and the width direction of the first movable spring piece 211; and the pusher 310b corresponding to the second movable spring piece 221 is limited in the moving range by the first contact unit 210 along the length direction and the width direction of the second movable spring piece 221. In this way, the position stability of each pusher 310b can be ensured, thereby ensuring that the second magnetic conductor 420 can reliably oppose the first magnetic conductor 410 to reduce magnetic loss.

[0162] Next, the structure of the second compression spring 230b of the second contact unit 220 is introduced, and the structure of the first compression spring 230a and the technical effects achieved can be referred to the second compression spring 230b, which will not be described here.

[0163] As shown in FIG. 4, the first compression spring 230a and the second compression spring 230b are respectively arranged on the first movable spring piece 211 and the second movable spring piece 221. Figure 5As shown, the second compression spring 230b includes a connecting end 231 and a swing end 232, and the connecting end 231 is fixedly connected to the second moving spring plate 221; the pusher 310b abuts against the swing end 232.

[0164] It should be noted that the "fixed connection" of the connecting end 231 to the second moving spring plate 221 means any connection mode without displacement relationship between the connecting end 231 and the second moving spring plate 221, such as riveting, welding, abutting, etc.

[0165] In the embodiment of the present application, when the current value flowing through the contact portion 200 is greater than or equal to the threshold value, the attractive force generated between the second magnetic conductor 420 and the first magnetic conductor 410 can pull the swing end 232 of the second compression spring 230b and further approach, so as to adjust the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410, increase the magnetic attractive force therebetween and the contact pressure provided by the compression spring 230, and further improve the short-circuit resistance.

[0166] Please continue to refer to Figure 5 In an embodiment, the swing end 232 has two limiting portions 2321, and the two limiting portions 2321 are arranged in the length direction (X-axis direction) of the second moving spring plate 221, and at least part of the pusher 310b is located between the two limiting portions 2321.

[0167] In the embodiment of the present application, in the X-axis direction, the two limiting portions 2321 provided on the second compression spring 230b limit the activity range of the pusher 310b.

[0168] Of course, in other embodiments, the activity range of the pusher 310b can also be limited by the second moving spring plate 221.

[0169] As shown in the drawings, Figure 2 The second moving spring plate 221 and / or the second compression spring 230b has a limiting slot 2215, at least part of the pusher 310b is located in the limiting slot 2215, and the limiting slot 2215 has two slot walls 2215a, and the two slot walls 2215a are oppositely arranged in the width direction (Z-axis direction) of the second moving spring plate 221.

[0170] In the embodiment of the present application, in the Z-axis direction, the limiting slot 2215 of the second moving spring plate 221 limits the activity range of the pusher 310b.

[0171] In an embodiment, the inner wall surface of the slot wall 2215a is an arc surface. By designing the inner wall surface of the slot wall 2215a as an arc surface, the generation of scrap between the pusher 310b and the slot wall 2215a can be avoided.

[0172] Of course, in other embodiments, the range of movement of the pusher 310b can also be limited by the armature assembly 310a, or by the second compression spring 230b.

[0173] Please continue to refer to Figure 5 The connecting end 231 of the second compression spring 230b is connected to the portion of the second moving spring plate 221 and the first moving spring plate 211 that are arranged opposite each other along the Y-axis direction, and the connecting end 231 is located on the side of the second moving spring plate 221 that faces away from the first moving spring plate 211. The swinging end 232 is bent to be connected to the connecting end 231 in a direction away from the first moving spring plate 211, and the end of the swinging end 232 that is away from the connecting end 231 is connected to the pusher 310b.

[0174] The swinging end 232 of the second compression spring 230b includes a third deformation section 2322 and a fourth deformation section 2323. One end of the third deformation section 2322 is connected to the connecting end 231, and the other end is connected to the fourth deformation section 2323. Both the third deformation section 2322 and the fourth deformation section 2323 are inclined relative to the main plate surface of the second moving spring plate 221, and the slope of the third deformation section 2322 is greater than the slope of the fourth deformation section 2323.

[0175] It should be noted that since the first moving spring plate 211 and the second moving spring plate 221 are elastic, when the portions of the two moving spring plates that are arranged opposite each other attract each other, each moving spring plate is prone to deforming in a direction closer to the other moving spring plate, causing the moving spring plate to rotate about the contact position of the moving contact and the stationary contact, and further causing the end of the second moving spring plate 221 that is provided with the second moving contact 222 to be raised toward one side of the armature assembly 310a. The raised end of the second moving spring plate 221 is prone to pushing the pusher 310b in a direction away from the contact of the moving contact and the stationary contact, causing the pusher 310b to drive the armature assembly 310a to rotate, and ultimately causing the moving contact and the stationary contact to be disconnected.

[0176] In the embodiments of the present application, both the third deformation section 2322 and the fourth deformation section 2323 are inclined relative to the main plate surface of the second moving spring plate 221, and the slope of the third deformation section 2322 is greater than the slope of the fourth deformation section 2323. This causes the swinging end 232 of the second compression spring 230b to form a two-section bending structure, and the distance between the swinging end 232 of the second compression spring 230b and the connecting end 231 along the contact separation direction of the moving contact and the stationary contact becomes larger, causing the distance between the swinging end 232 and the second moving spring plate 221 to also become larger. Even if the end of the second moving spring plate 221 that is provided with the second moving contact 222 is raised toward one side of the armature assembly 310a and the pusher 310b moves further toward the first magnetic conductor 410, the end of the second moving spring plate 221 is not prone to contacting the fourth deformation section 2323 or pushing the pusher 310b, avoiding accidental disconnection of the moving contact and the stationary contact of the relay.

[0177] AsFigure 4 As shown, the swing end 232 of the first compression spring 230a includes a first deformation section 2324 and a second deformation section 2325, one end of the first deformation section 2324 is connected to the connecting end 231, and the other end is connected to the second deformation section 2325; both the first deformation section 2324 and the second deformation section 2325 are inclined relative to the main plate surface of the first moving spring plate 211, and the slope of the first deformation section 2324 is greater than the slope of the second deformation section 2325.

[0178] In the embodiment of the present application, both the first deformation section 2324 and the second deformation section 2325 are inclined relative to the main plate surface of the first moving spring plate 211, and the slope of the first deformation section 2324 is greater than the slope of the second deformation section 2325, so that the swing end 232 of the first compression spring 230a forms a two-section bending structure, the distance between the swing end 232 of the first compression spring 230a and the connecting end 231 in the contact separation direction of the moving and stationary contacts becomes larger, so that the distance between the swing end 232 and the first moving spring plate 211 also becomes larger, that is, the end of the first moving spring plate 211 away from one side of the armature assembly 310a is not easily pushed against the pusher 310b, avoiding accidental disconnection of the moving and stationary contacts of the relay.

[0179] In an embodiment, when the contact portion 200 is in a closed state, at least part of the first moving spring plate 211 and at least part of the second moving spring plate 221 are arranged opposite to each other in the Y-axis direction, and the current flowing through them has the same flow direction.

[0180] In the embodiment of the present application, when the contact portion 200 is energized, the two parts of the first moving spring plate 211 and the second moving spring plate 221 that are arranged opposite to each other and have the same flow direction can generate an opposite Ampere force between each other, so that the contact portion 200 itself has the ability to resist short circuit. In addition, the first moving spring plate 211 and the second moving spring plate 221 can act as a shunt, which is conducive to reducing the electrodynamic repulsive force between the moving and stationary contacts, thereby playing a role in resisting short circuit.

[0181] In an embodiment, the connecting end 231 of the second compression spring 230b and the second moving contact 222 are connected to the same position of the second moving spring plate 221.

[0182] In this embodiment, since the connection end 231 of the second compression spring 230b corresponds to the position of the second moving contact 222, the elastic force generated by the deformation of the second compression spring 230b can directly act on the second moving contact 222, thereby enabling the second moving contact 222 to obtain greater contact pressure. In addition, it can prevent the second moving spring 221 from deforming due to being abutted by the second compression spring 230b, thereby preventing the second moving spring 222 from abutting against the second compression spring 230b in a direction away from the second moving contact 222 due to deformation, thus preventing the pushing member 310b from being subjected to a force in the direction away from the first stationary contact 212, ensuring that there is a sufficiently large magnetic attraction between the first magnetic conductor 410 and the second magnetic conductor 420, and improving the short-circuit resistance.

[0183] The connecting end 231 of the first compression spring 230a is connected to the first moving contact 213 at the same position as the first moving spring 211.

[0184] In this embodiment, since the connecting end 231 of the first compression spring 230a corresponds to the position of the first moving contact 213, the elastic force generated by the deformation of the first compression spring 230a can directly act on the first moving contact 213, thereby enabling the first moving contact 213 to obtain greater contact pressure. In addition, it can also prevent the first moving spring 211 from deforming due to being abutted by the first compression spring 230a, thereby preventing the first moving spring 211 from abutting against the first compression spring 230a in a direction away from the first moving contact 213 due to deformation, thus preventing the pushing member 310b from being subjected to a force in the direction away from the second stationary contact 223, ensuring that there is a sufficiently large magnetic attraction between the first magnetic conductor 410 and the second magnetic conductor 420, and improving the short-circuit resistance.

[0185] In one embodiment, the pusher 310b of the drive portion 300 can be integrally connected to the armature assembly 310a to form a drive arm. Both drive arms of the armature assembly 310a have drive ends 318, which are directly connected to the first movable spring 211 and the second movable spring 221, respectively. A second magnetic conductor 420 is disposed on the drive arm 3151. For example, the second magnetic conductor 420 is connected to the drive arm 3151 via integral injection molding.

[0186] like Figure 7 As shown, the relay also includes two conductive elements 500, which are respectively connected to the first lead-out terminal 214 and the second lead-out terminal 224, and the two conductive elements 500 extend in the same direction along the contact separation direction of the contact. The conductive element connected to the first lead-out terminal 214 is defined as the first conductive element 510, and the conductive element connected to the second lead-out terminal 224 is defined as the second conductive element 520.

[0187] If current flows in through the second conductive element 520 and out through the first conductive element 510, the magnetic field direction in the region between the first conductive element 510 and the second conductive element 520 is perpendicular to the paper and extends from outside the paper to inside the paper. The magnetic field will generate an Ampere force F on the second moving reed 221. According to the left-hand rule, the direction of this Ampere force F is towards the driving part 300. The Ampere force F can drive the second moving reed 221 to move in the direction where the second moving contact 222 is disconnected from the first stationary contact 212.

[0188] Therefore, the relay in this embodiment of the application, by setting the anti-short circuit structure 400, can reduce the adverse effects of the magnetic field formed by the first conductive element 510 and the second conductive element 520 on the contact closure, and avoid the instantaneous disconnection of the moving and stationary contacts.

[0189] like Figure 7 As shown, the first conductive element 510 and the second conductive element 520 extend from the first lead-out terminal 214 and the second lead-out terminal 224 respectively in a direction away from the driving portion 300. The first contact unit 210 is located on the side of the second contact unit 220 away from the driving portion 300, and a short-circuit protection structure 400 is provided near the first contact group 251.

[0190] Because the first lead-out terminal 214 and the second lead-out terminal 224 extend away from the drive section 300, the ends of the first lead-out terminal 214 and the second lead-out terminal 224 that are connected to the high-voltage circuit can be far away from the drive section 300, making the distance between the high-voltage and low-voltage circuits as far as possible, resulting in good high-voltage resistance. In addition, it also reduces the influence of the magnetic field generated by the first lead-out terminal 214 and the second lead-out terminal 224 after being energized on the drive section 300, thereby improving the reliability of the drive section 300.

[0191] As described above, the magnetic field in the region between the first conductive element 510 and the second conductive element 520 applies an Ampere force F to the second moving spring 221. This Ampere force F tends to cause the second moving contact 222 to disconnect from the first stationary contact 212. In this embodiment, a short-circuit protection structure 400 is provided near the first contact group 241. The magnetic attraction force formed by the short-circuit protection structure 400 can weaken or even cancel the Ampere force F on the second moving spring 221, thereby improving the short-circuit protection capability of the contact portion 200. Based on the lead-out direction of the first conductive element 510 and the second conductive element 520, the direction of the Ampere force on the second contact group 252 is oriented in order to achieve a short-circuit protection effect. Therefore, a short-circuit protection structure 400 can be provided near the second contact group 252, or it can be omitted. When a short-circuit protection structure 400 is not provided near the second contact group 252, the structural complexity and cost are reduced.

[0192] In an embodiment, the first magnetic conductor 410 is fixed to the portion of the first contact unit 210 through which the current flows, and at least part of the first magnetic conductor 410 is located on the side of the first contact unit 210 away from the second moving spring piece 221 along the moving direction of the pusher 310b.

[0193] As shown in Figure 8 At least one of the first moving spring piece 211 and the second moving spring piece 221 has a plurality of spring pieces 240 stacked, and part of the plurality of spring pieces 240 between the first contact group 251 and the second contact group 252 has a bending portion 241.

[0194] In the embodiments of the present application, part of the plurality of spring pieces 240 between the first contact group 251 and the second contact group 252 has a bending portion 241, and another part of the plurality of spring pieces 240 does not have a bending portion 241. On the one hand, the bending portion 241 can serve as a rotation fulcrum of the moving spring piece, facilitating deformation of the movable end of the moving spring piece. On the other hand, the spring piece 240 with the bending portion 241 increases the flexibility of the overall moving spring piece, and the spring piece 240 without the bending portion 241 can increase the rigidity of the overall moving spring piece, thereby ensuring smooth deformation of the movable end of the moving spring piece, avoiding too large deformation of the moving spring piece due to the attraction between the two moving spring pieces, and further avoiding the problem of the end of the moving spring piece being easily warped and pushing back the pusher 310b.

[0195] As an example, the first moving spring piece 211 and the second moving spring piece 221 each include three spring pieces 240, and among the three spring pieces 240 of each moving spring piece, two spring pieces 240 have a bending portion 241, and the remaining one spring piece 240 does not have a bending portion 241.

[0196] In an embodiment, the bending portion 241 of the first moving spring piece 211 protrudes toward the second moving spring piece 221, and the bending portion 241 of the second moving spring piece 221 protrudes toward the first moving spring piece 211.

[0197] In the embodiments of the present application, the bending portion 241 of the first moving spring piece 211 protrudes toward the second moving spring piece 221, and the bending portion 241 of the second moving spring piece 221 protrudes toward the first moving spring piece 211. Compared to protruding outward, the bending portion 241 of each moving spring piece protrudes inward, effectively utilizing the space between the first moving spring piece 211 and the second moving spring piece 221, and avoiding occupying too much space.

[0198] Second Embodiment

[0199] As shown in Figures 9 to 19 The differences between the relay of the second embodiment of the present application and the relay of the first embodiment are as follows: As shown in Figures 9 to 12 The first movable end 2112 of the first movable spring 211 is provided on the same side of the first fixed end 2111 as the first movable end 2112 of the first movable spring 211. That is, along the contact separation direction of the corresponding stationary contact and movable contact, the position of the first movable end 2112 of the first movable spring 211 corresponds to the position of the first fixed end 2111 of the first movable spring 211.

[0200] The second movable end 2212 of the second movable spring 221 is provided on the same side of the second fixed end 2211 as the second movable end 2212 of the second movable spring 221. That is, along the contact separation direction of the corresponding stationary contact and movable contact, the position of the second movable end 2212 of the second movable spring 221 corresponds to the position of the second fixed end 2211 of the second movable spring 221.

[0201] In an embodiment, the first fixed end 2111, the first movable end 2112, the second fixed end 2211, and the second movable end 2212 are all in a sheet structure. The first fixed end 2111 and the second fixed end 2211 are arranged on the same plane.

[0202] In an embodiment, the first movable end 2112 of the first movable spring 211 is provided on the same side of the first fixed end 2111 as the first movable end 2112 of the first movable spring 211. That is, along the contact separation direction of the corresponding stationary contact and movable contact, the position of the first movable end 2112 of the first movable spring 211 corresponds to the position of the first fixed end 2111 of the first movable spring 211.

[0203] The driving portion 300 is located on the side of the two movable ends away from the two fixed ends. In the embodiment of the present application, the driving portion 300 is located on the side of the first movable end 2112 away from the second fixed end 2211, and the driving portion 300 is located on the side of the second movable end 2212 away from the first fixed end 2111.

[0204] The driving portion 300 is arranged on the side of the movable end away from the fixed end, so that the driving portion 300 can be away from the fixed end and the lead-out terminal, which reduces the influence of the magnetic field generated by the fixed end and the lead-out terminal on the driving portion 300 after the fixed end and the lead-out terminal are powered on, and improves the reliability of the driving portion 300.

[0205] Of course, in other embodiments, the first movable end 2112 can also be located on the side of the second fixed end 2211 away from the driving portion 300, and the second movable end 2212 can be located on the side of the first fixed end 2111 away from the driving portion 300.

[0206] The driving part 300 is connected with the movable ends of the two contact assemblies, and is used to drive the movable ends to move relative to the fixed ends corresponding to the movable ends, so as to drive the movable ends to contact or separate from the fixed ends. That is, the driving part 300 is connected with the first movable end 2112 and the second movable end 2212 at the same time, and is used to drive the first movable end 2112 to move relative to the second fixed end 2211 and the second movable end 2212 to move relative to the first fixed end 2111 at the same time, so as to drive the first movable end 2112 to contact or separate from the second fixed end 2211 and the second movable end 2212 to contact or separate from the first fixed end 2111.

[0207] As shown in FIG. 2, when the contact part 200 is switched from the open state to the closed state, the driving part 300 drives the first movable end 2112 and the second movable end 2212 to move towards the first fixed end 2111 and the second fixed end 2211 respectively, so that the first movable end 2112 contacts the second fixed end 2211 and the second movable end 2212 contacts the first fixed end 2111. Figure 11

[0208] As shown in FIG. 3, when the contact part 200 is switched from the closed state to the open state, the driving part 300 drives the first movable end 2112 and the second movable end 2212 to move away from the first fixed end 2111 and the second fixed end 2211 respectively, so that the first movable end 2112 separates from the second fixed end 2211 and the second movable end 2212 separates from the first fixed end 2111. Figure 12

[0209] Therefore, the relay of the embodiment of the present application has the following advantages. The movable ends of the two contact assemblies are arranged on the same side of the fixed ends corresponding to the movable ends in the two contact assemblies, and the movable ends of the two contact assemblies are driven by the same driving part 300 to switch the two contact assemblies from the closed state to the open state and from the open state to the closed state. Therefore, the movement space required by the movable ends of the two contact assemblies when the movable ends are closed or separated is located on the same side of the fixed ends of the two contact assemblies. Thus, only enough space needs to be reserved on one side of the fixed ends of the two contact assemblies, and no space needs to be reserved on both sides of the fixed ends of the two contact assemblies. Therefore, the structure of the two contact assemblies and the driving part 300 is designed to be more compact in the driving direction, so that the size of the two contact assemblies occupying the internal space of the relay is significantly reduced, which is beneficial to the miniaturization design of the product.

[0210] As shown in FIG. 4, the relay of the embodiment of the present application has the following advantages. The movable ends of the two contact assemblies are arranged on the same side of the fixed ends corresponding to the movable ends in the two contact assemblies, and the movable ends of the two contact assemblies are driven by the same driving part 300 to switch the two contact assemblies from the closed state to the open state and from the open state to the closed state. Therefore, the movement space required by the movable ends of the two contact assemblies when the movable ends are closed or separated is located on the same side of the fixed ends of the two contact assemblies. Thus, only enough space needs to be reserved on one side of the fixed ends of the two contact assemblies, and no space needs to be reserved on both sides of the fixed ends of the two contact assemblies. Therefore, the structure of the two contact assemblies and the driving part 300 is designed to be more compact in the driving direction, so that the size of the two contact assemblies occupying the internal space of the relay is significantly reduced, which is beneficial to the miniaturization design of the product. Figure 9 ​​As shown, the first magnetic conductor 410 is located on the side of the first fixed end 2111 of the first moving spring 211 away from the second movable end 2212 of the second moving spring 221, and the second magnetic conductor 420 is arranged on the driving portion 300 and located on the side of the second movable end 2212 of the second moving spring 221 facing the first fixed end 2111 of the first moving spring 211. In the example provided in the embodiment, the second magnetic conductor 420 is fixedly connected to the driving arm 3151 of the armature assembly 315. However, it is to be understood that in this embodiment, the driving arm 3151 of the armature assembly 315 can also be driven to move the moving spring in a manner similar to the first embodiment by pushing a pushing member, and on this basis, by arranging a movable gap on the pushing member and the driving arm 3151 of the armature assembly 315, or by abutting the second magnetic conductor 420 between the compression spring and the pushing member, the second magnetic conductor 420 can also be moved in the direction of approaching the first magnetic conductor 410 to reduce the magnetic gap therebetween when the current value passing through the contact portion 200 is greater than or equal to the threshold value.

[0211] The first magnetic conductor 410 can be fixedly installed on the first lead-out terminal 214 of the first contact assembly 210, or can be fixedly installed on the first fixed end 2111 of the first contact assembly 210, which is not limited in the present application.

[0212] As shown in Figure 11 and Figure 12 The lead-out terminal is in a sheet structure, and the lead-out terminals of the two contact assemblies are arranged on the same second plane, i.e., the first lead-out terminal 214 and the second lead-out terminal 224 are arranged on the same second plane. The second plane is perpendicular to the contact separation direction of the corresponding moving contact and stationary contact. The "contact separation direction of the moving contact and the stationary contact" is parallel to the movement direction of the pushing member 310b.

[0213] In an embodiment, the relay further comprises two conductive members 500 with the same length, one end of each of the two conductive members 500 is connected to the lead-out terminal of the two contact assemblies, and extends from the respective corresponding lead-out terminal in the contact separation direction of the moving and stationary contacts and in the direction away from the driving portion.

[0214] In the embodiment of the present application, the lead-out terminal and the conductive member 500 are located on the side away from the coil assembly 320, which reduces the influence of the magnetic field generated when the lead-out terminal, the conductive member 500 and the external connecting member electrically connected to the conductive member 500 are energized on the magnetic circuit between the coil assembly 320 and the armature assembly 310a, and ensures that the magnetic holding force of the armature assembly 310a is not weakened too much.

[0215] In addition, since the first lead-out terminal 214 and the second lead-out terminal 224 are arranged on the same plane, the two conductive members 500 are connected with the first lead-out terminal 214 and the second lead-out terminal 224 respectively, and the two conductive members 500 extend from the corresponding lead-out terminals in the contact separation direction of the movable contact and the stationary contact and away from the driving part 300. Since the connection starting points of the two conductive members 500 are on the same plane, only two conductive members 500 with the same length need to be selected to achieve the effect that the ends of the two conductive members 500 are flush. Compared with the prior art in which the fixed ends of the two movable spring sheets are arranged staggered in the contact / separation direction of the movable contact and the stationary contact and different lengths of conductive members 500 are used, the two conductive members 500 in the embodiment of the application have the same length, which saves material cost.

[0216] As shown in FIG. 1, the first movable spring sheet 211 and the second movable spring sheet 221 are arranged in a cross manner. Figure 13

[0217] In an embodiment, the cross region of the first movable spring sheet 211 and the second movable spring sheet 221 is located between the two groups of corresponding movable contacts and stationary contacts. Specifically, the second movable contact 222 and the first stationary contact 212 are defined as the first contact group, the first movable contact 213 and the second stationary contact 223 are defined as the second contact group, and the cross region of the first movable spring sheet 211 and the second movable spring sheet 221 is located between the first contact group and the second contact group.

[0218] In the embodiment of the application, the cross region of the first movable spring sheet 211 and the second movable spring sheet 221 is located between the two groups of contact groups, which makes full use of the space between the two groups of contact groups without occupying other regions, further reduces the space occupied by the two contact assemblies, and is beneficial to the miniaturization design of the product.

[0219] In an embodiment, the first movable spring sheet 211 has a first curved section 2113, the first fixed end 2111 is connected with one end of the first curved section 2113, and the first movable end 2112 is connected with the other end of the first curved section 2113. The first fixed end 2111 is connected with the first movable end 2112 through the first curved section 2113, and the first stationary contact 212 and the first movable contact 213 on the first movable spring sheet 211 are arranged staggered in the contact separation direction of the contacts. The second movable spring sheet 221 has a second curved section 2213, the second fixed end 2211 is connected with one end of the second curved section 2213, and the second movable end 2212 is connected with the other end of the second curved section 2213. The second fixed end 2211 is connected with the second movable end 2212 through the second curved section 2213, and the second movable contact 222 and the second stationary contact 223 on the second movable spring sheet 221 are arranged staggered in the contact separation direction of the contacts. The first curved section 2113 and the second curved section 2213 are arranged in a cross manner.

[0220] ​In the embodiments of the present application, on the one hand, the movable end of the movable spring sheet is connected with the fixed end through the bending section, the bending section has a better elastic deformation capacity and is more likely to deform, so that the bending section can serve as a bending fulcrum when the movable end moves, and the movable end is more likely to be pushed by the armature assembly 310a to move; on the other hand, the two movable spring sheets are arranged in a cross manner through the two bending sections, and most of the area of the movable spring sheet can be used to form the fixed end and the movable end, so that the magnetic attraction force and the short-circuit resistance can be improved.

[0221] It can be understood that the bending shape of each bending section can be U-shaped, V-shaped, C-shaped or polygonal, and the present application does not limit this.

[0222] In an embodiment, the first fixed end 2111, the first movable end 2112, the second fixed end 2211 and the second movable end 2212 are all flat sheet-shaped, and when the contact part is in a closed state, the plane where the first fixed end 2111 of the first movable spring sheet 211 is located is parallel to the plane where the first movable end 2112 is located, and the plane where the second fixed end 2211 of the second movable spring sheet 221 is located is parallel to the plane where the second movable end 2212 is located.

[0223] In an embodiment, the first fixed end 2111 and the second fixed end 2211 are arranged on the same first plane, and the first plane is perpendicular to the contact separation direction of the corresponding movable contact and the stationary contact. Wherein, the contact separation direction of the movable contact and the stationary contact is parallel to the movement direction of the pushing member 310b.

[0224] In the embodiments of the present application, the plane where the fixed end of the movable spring sheet is located is parallel to the plane where the movable end is located, so that the structure formed after the first movable spring sheet 211 and the second movable spring sheet 221 are arranged in a cross manner is more compact, and the size of the space occupied in the relay is further reduced.

[0225] Of course, in other embodiments, the first movable spring sheet 211 and the second movable spring sheet 221 can also be arranged in a straight sheet type structure at the part located between the movable contact and the stationary contact, and the first movable spring sheet 211 and the second movable spring sheet 221 are arranged in a cross manner to form an “X” type structure.

[0226] The bending sections of the two contact assemblies have notches, the bending section of each contact assembly passes through the notch of the other contact assembly, and the two bending sections do not contact each other. That is, as shown in Figure 13 the first bending section 2113 has a first notch 2114, the second bending section 2213 has a second notch 2214, the first bending section 2113 passes through the second notch 2214, and the second bending section 2213 passes through the first notch 2114. Moreover, the first bending section 2113 and the second bending section 2213 do not contact each other.

[0227] In the embodiment of the present application, the two movable spring sheets do not contact each other, and two current paths can independently flow through the two movable spring sheets, so that the two movable spring sheets form a reliable parallel circuit structure, ensuring the effects of current splitting and reducing temperature rise. In addition, the two movable spring sheets are arranged in a cross arrangement by means of the notch provided on the movable spring sheet, the structure of the movable spring sheet is simpler, the material loss is smaller, and the space occupation in the width direction of the movable spring sheet is smaller, which is further conducive to realizing the miniaturization design of the product. Furthermore, the two movable spring sheets are both provided with notches, which helps to ensure the consistency of the structure of the two movable spring sheets, so as to ensure the consistency of the contact performance and the breaking performance of the two movable spring sheets as much as possible.

[0228] Please refer to Figure 10 , the first fixed end 2111 and the second fixed end 2211 are arranged in parallel.

[0229] In an embodiment, the first lead-out terminal 214 is located on the side of the first fixed end 2111 away from the second movable end 2212, and the second lead-out terminal 224 is located on the side of the second fixed end 2211 away from the first movable end 2112.

[0230] In an embodiment, the first fixed end 2111 and the first lead-out terminal 214 are connected by riveting, and the second fixed end 2211 and the second lead-out terminal 224 are connected by riveting, but not limited thereto.

[0231] In the embodiment of the present application, the fixed end, the lead-out terminal and the fixed end are fixedly connected with each other, and since the lead-out terminal is fixedly connected with the second shell 120, the lead-out terminal can play a role in stabilizing the position of the fixed contact.

[0232] In an embodiment, the size and structure of the first movable spring sheet 211 and the second movable spring sheet 221 are the same. Through such a design, when the two movable spring sheets are arranged in a cross arrangement, a symmetrical structure can be formed, so that the counterforce of the two contact assemblies is basically equal, and the force balance of the armature assembly 310a is further ensured. In addition, the contact performance and breaking performance of the two contact assemblies can be kept as consistent as possible.

[0233] As shown in Figure 11 and Figure 12 , the coil assembly 320 is configured to drive the armature assembly 310a to move along a straight line in response to an input signal, so as to drive the first movable end 2112 and the second movable end 2212 to move.

[0234] In an embodiment, the moving direction of the armature assembly 310a is parallel to the thickness direction of the first fixed end 2111.

[0235] Compared with the rotating design of the armature assembly in the prior art, the armature assembly 310a in the embodiment of the application is designed to move along a straight line, and there is no problem of loss of radial component, and the armature assembly 310a has the advantages of simple structure, simplified assembly process, and not occupying too much space.

[0236] As shown in Figure 10 and Figure 14 , the armature assembly 310a includes two armatures, two permanent magnets, and a packaging member 315, and the packaging member 315 connects the two armatures and the two permanent magnets into one whole member.

[0237] In an embodiment, the packaging member 315 connects the two armatures and the two permanent magnets into one whole member through an injection molding process, but is not limited thereto. The packaging member 315 has two driving arms 3151, which are respectively connected to the first movable end 2112 and the second movable end 2212 to drive the first movable end 2112 and the second movable end 2212 to move, respectively. For ease of description, the two armatures are defined as a first armature 311 and a second armature 312, and the two permanent magnets are defined as a first permanent magnet 313 and a second permanent magnet 314.

[0238] As shown in Figure 9 , the second magnetic conductor 420 can be arranged on the driving arm 3151. Further, the second magnetic conductor 420 and the driving arm 3151 can be connected through one-piece injection molding, but are not limited thereto.

[0239] As shown in Figure 14 , the coil assembly 320 includes a coil frame 321, a coil winding 322, a core 323, a first yoke 324, a second yoke 325, and three signal input terminals 326. The coil frame 321 has a central hole, and the core 323 is arranged in the central hole. The coil winding 322 is connected to the three signal input terminals 326, and the signal input terminals 326 are used to receive pulse electrical signals. The first yoke 324 and the second yoke 325 are respectively connected to the two axial ends of the core 323, and the end of the first yoke 324 away from the core 323 forms a first magnetic driving end 3241, and the end of the second yoke 325 away from the core 323 forms a second magnetic driving end 3251. The first magnetic driving end 3241 and the second magnetic driving end 3251 are arranged along the axial direction of the core 323 and extend close to each other.

[0240] The coil winding 322 is excited by the pulse electrical signal to reverse the polarity temporarily formed by the first magnetic driving end 3241 and the second magnetic driving end 3251, so as to switch the different parts of the two armatures to be attracted and drive the armature assembly 310a to move. In this embodiment, for the convenience of introduction, it is assumed that when the signal input terminal 326 receives the first pulse electrical signal, the coil winding 322 generates a first magnetic field, and the first magnetic driving end 3241 temporarily has an N-pole polarity, and the second magnetic driving end 3251 temporarily has an S-pole polarity. After the first pulse electrical signal disappears, the first magnetic field of the coil winding 322 disappears, and the first magnetic driving end 3241 and the second magnetic driving end 3251 no longer have the polarity generated based on the first magnetic field; when the signal input terminal 326 receives a second pulse electrical signal with a current direction opposite to that of the first pulse electrical signal, the coil winding 322 generates a second magnetic field, and the polarity of the first magnetic driving end 3241 is reversed to have an S-pole polarity, and the polarity of the second magnetic driving end 3251 is reversed to have an N-pole polarity. After the second pulse electrical signal disappears, the second magnetic field of the coil winding 322 disappears, and the first magnetic driving end 3241 and the second magnetic driving end 3251 no longer have the polarity generated based on the second magnetic field.

[0241] As shown in Figure 14 The armature assembly 310a is driven by the coil assembly 320 to move between the first position and the second position. When the armature assembly 310a moves to the first position, the relay is in an open state. When the armature assembly 310a moves to the second position, the relay is in a closed state.

[0242] The first permanent magnet 313 and the second permanent magnet 314 are arranged in the axial direction of the core 323, and each permanent magnet is provided with two magnetic poles with fixed polarity, and the polarities of the two magnetic poles are opposite. For the convenience of introduction, the two magnetic poles of each permanent magnet are respectively a first magnetic pole 316 and a second magnetic pole 317, and it is assumed that the polarity of the first magnetic pole 316 is N-pole, and the polarity of the second magnetic pole 317 is S-pole.

[0243] The first armature 311 and the second armature 312 are arranged in a cross manner. The first armature 311 is in contact with the first magnetic poles 316 of the two permanent magnets. The second armature 312 is in contact with the second magnetic poles 317 of the two permanent magnets. The first armature 311 has a first attraction part 3111 and a second attraction part 3112, and the second armature 312 has a third attraction part 3121 and a fourth attraction part 3122. The position of the first attraction part 3111 corresponds to the position of the fourth attraction part 3122, and the first permanent magnet 313 is arranged between the first attraction part 3111 and the fourth attraction part 3122. The position of the second attraction part 3112 corresponds to the position of the third attraction part 3121, and the second permanent magnet 314 is arranged between the second attraction part 3112 and the third attraction part 3121.

[0244] As shown in Figure 14As shown, the first magnetic drive end 3241 is located between the first attraction part 3111 and the fourth attraction part 3122, and the second magnetic drive end 3251 is located between the second attraction part 3112 and the third attraction part 3121.

[0245] like Figure 14 As shown, when the armature assembly 310a is in the magnetic holding state in the first position, the first engaging part 3111 engages the first magnetic drive end 3241, and the third engaging part 3121 engages the second magnetic drive end 3251. At this time, the drive part 300 forms two closed magnetic circuits, namely the first closed magnetic circuit and the second closed magnetic circuit. The first closed magnetic circuit starts from the first magnetic pole 316 of the first permanent magnet 313, passes through the first engaging part 3111, the first magnetic drive end 3241, the first yoke 324, the iron core 323, the second yoke 325, the second magnetic drive end 3251, the third engaging part 3121, the part where the second armature 312 and the first armature 311 intersect, and the second magnetic pole 317 of the first permanent magnet 313 and returns to the first magnetic pole 316 of the first permanent magnet 313, without any air gap in between, and passes through the entire coil assembly 320. The second closed magnetic circuit extends from the first magnetic pole 316 of the second permanent magnet 314, through the portion where the first armature 311 and the second armature 312 intersect, the first attraction part 3111, the first magnetic drive end 3241, the first yoke 324, the iron core 323, the second yoke 325, the second magnetic drive end 3251, the third attraction part 3121, and the second magnetic pole 317 of the second permanent magnet 314 back to the first magnetic pole 316 of the second permanent magnet 314, without any air gap in between, and passes through the entire coil assembly 320. Therefore, when the armature assembly 310a is in the magnetic holding state in the first position, due to the existence of the first closed magnetic circuit and the second closed magnetic circuit, and the superposition effect between the two, a greater magnetic attraction force is generated between the first attraction part 3111 and the first magnetic drive end 3241, and between the third attraction part 3121 and the second magnetic drive end 3251, so that the armature assembly 310a is held in the first position relative to the coil assembly 320.

[0246] like Figure 15As shown, at this time, the coil winding 322 is excited by the first pulse electric signal to generate the first magnetic field, so that the first magnetic driving end 3241 temporarily has the N-pole polarity, and the second magnetic driving end 3251 temporarily has the S-pole polarity. Since the first magnetic driving end 3241 and the first attraction part 3111 have the same N-pole polarity, the first magnetic driving end 3241 generates the magnetic repulsion force to the first attraction part 3111; since the second magnetic driving end 3251 and the third attraction part 3121 have the same S-pole polarity, the second magnetic driving end 3251 generates the magnetic repulsion force to the third attraction part 3121. Moreover, the driving part 300 at this time forms two push magnetic circuits, i.e. the first push magnetic circuit and the second push magnetic circuit. The first push magnetic circuit passes through the first magnetic driving end 3241, the stroke air gap, the fourth attraction part 3122, the second magnetic pole 317 of the first permanent magnet 313, the first magnetic pole 316 of the first permanent magnet 313, the part where the first armature 311 and the second armature 312 cross each other, the second attraction part 3112, the stroke air gap, the second magnetic driving end 3251, the second yoke 325, the core 323, the first yoke 324, and returns to the first magnetic driving end 3241, with only two stroke air gaps in the middle and passing through the entire coil assembly 320. The second push magnetic circuit passes through the first magnetic driving end 3241, the stroke air gap, the fourth attraction part 3122, the part where the first armature 311 and the second armature 312 cross each other, the second magnetic pole 317 of the second permanent magnet 314, the first magnetic pole 316 of the second permanent magnet 314, the second attraction part 3112, the stroke air gap, the second magnetic driving end 3251, the second yoke 325, the core 323, the first yoke 324, and returns to the first magnetic driving end 3241, with also only two stroke air gaps in the middle and passing through the entire coil assembly 320. Therefore, when the coil assembly 320 just receives the first pulse electric signal, not only the first magnetic driving end 3241 generates the magnetic repulsion force to the first attraction part 3111, and the second magnetic driving end 3251 generates the magnetic repulsion force to the third attraction part 3121, but also due to the existence of the first push magnetic circuit and the second push magnetic circuit, and the superposition effect between the two, the first magnetic driving end 3241 generates the magnetic attraction force to the fourth attraction part 3122, and the second magnetic driving end 3251 generates the magnetic attraction force to the second attraction part 3112, so that the coil assembly 320 can form a stronger pushing force to the armature assembly 310a to push the armature assembly 310a to move from the first position to the second position.

[0247] As Figure 16As shown, when the armature assembly 310a has just moved to the second position, the first pulse electrical signal and the first magnetic field have not yet disappeared. The first magnetic drive end 3241 still temporarily has the N pole polarity, and the second magnetic drive end 3251 still temporarily has the S pole polarity. At this time, the drive part 300 forms two closed magnetic circuits, namely the third closed magnetic circuit and the fourth closed magnetic circuit. The third closed magnetic circuit starts from the first magnetic drive end 3241, passes through the fourth attraction part 3122, the second magnetic pole 317 of the first permanent magnet 313, the first magnetic pole 316 of the first permanent magnet 313, the part where the first armature 311 and the second armature 312 intersect, the second attraction part 3112, the second magnetic drive end 3251, the second yoke 325, the iron core 323, and the first yoke 324 and returns to the first magnetic drive end 3241, without any air gap in between, and passes through the entire coil assembly 320. The fourth closed magnetic circuit originates from the first magnetic drive end 3241, passes through the fourth attraction part 3122, the portion where the first armature 311 and the second armature 312 intersect, the second magnetic pole 317 of the second permanent magnet 314, the first magnetic pole 316 of the second permanent magnet 314, the second attraction part 3112, the second magnetic drive end 3251, the second yoke 325, the iron core 323, and the first yoke 324, and returns to the first magnetic drive end 3241, without any air gap in between, and passes through the entire coil assembly 320. Therefore, when the armature assembly 310a has just moved to the second position, due to the existence of the third and fourth closed magnetic circuits and the superposition effect between them, a greater magnetic attraction force is generated between the first magnetic drive end 3241 and the fourth attraction part 3122, and between the second magnetic drive end 3251 and the second attraction part 3112.

[0248] like Figure 17 As shown, when the first pulse electrical signal disappears, the first magnetic field disappears, and the first magnetic drive end 3241 and the second magnetic drive end 3251 no longer have the polarity generated by the first magnetic field. At this time, the aforementioned third closed magnetic circuit and fourth closed magnetic circuit still exist. The third closed magnetic circuit can be considered to originate from the first magnetic pole 316 of the first permanent magnet 313, and its path is... Figure 16 The path of the third closed magnetic loop shown is the same; the fourth closed magnetic loop can be considered to start from the first magnetic pole 316 of the second permanent magnet 314, and its path is the same as... Figure 16 The path of the fourth closed magnetic circuit shown is the same. The third closed magnetic circuit and the fourth closed magnetic circuit are superimposed on each other, so that a greater magnetic attraction is generated between the fourth attraction part 3122 and the first magnetic drive end 3241 and between the second attraction part 3112 and the second magnetic drive end 3251, and the armature assembly 310a is held in the second position relative to the coil assembly 320.

[0249] like Figure 18As shown, at this time, the coil winding 322 is excited by the second pulse electrical signal to generate a second magnetic field, causing the first magnetic drive end 3241 to temporarily have an S pole polarity, and the second magnetic drive end 3251 to temporarily have an N pole polarity. Since the first magnetic drive end 3241 and the fourth attraction part 3122 have the same polarity, both being S poles, the first magnetic drive end 3241 generates a magnetic repulsion force on the fourth attraction part 3122; since the second magnetic drive end 3251 and the second attraction part 3112 have the same polarity, both being N poles, the second magnetic drive end 3251 generates a magnetic repulsion force on the second attraction part 3112. Furthermore, the drive section 300 also forms two driving magnetic circuits at this time, namely the third driving magnetic circuit and the fourth driving magnetic circuit. The third driving magnetic circuit starts from the second magnetic drive end 3251, passes through the travel air gap, the third attraction part 3121, the part where the second armature 312 and the first armature 311 intersect, the second magnetic pole 317 of the first permanent magnet 313, the first magnetic pole 316 of the first permanent magnet 313, the first attraction part 3111, the travel air gap, the first magnetic drive end 3241, the first yoke 324, the iron core 323, and the second yoke 325, and returns to the second magnetic drive end 3251. There are only two travel air gaps in between, and it passes through the entire coil assembly 320. The fourth driving magnetic circuit runs from the second magnetic drive end 3251 through the travel air gap, the third attraction part 3121, the second magnetic pole 317 of the second permanent magnet 314, the first magnetic pole 316 of the second permanent magnet 314, the part where the first armature 311 and the second armature 312 intersect, the first attraction part 3111, the travel air gap, the first magnetic drive end 3241, the first yoke 324, the iron core 323, and the second yoke 325 back to the second magnetic drive end 3251. There are only two travel air gaps in between, and it passes through the entire coil assembly 320. Therefore, when the coil assembly 320 receives the second pulse electrical signal, not only does the first magnetic drive end 3241 exert a magnetic repulsive force on the fourth attraction part 3122, and the second magnetic drive end 3251 exert a magnetic repulsive force on the second attraction part 3112, but also, due to the existence of the third push magnetic circuit and the fourth push push circuit, and the superposition effect between the two, the first magnetic drive end 3241 generates a magnetic attraction force on the first attraction part 3111, and the second magnetic drive end 3251 generates a magnetic attraction force on the third attraction part 3121, so that the coil assembly 320 can form a stronger driving force on the armature assembly 310a, pushing the armature assembly 310a to move from the second position to the first position.

[0250] like Figure 19 As shown, when the armature assembly 310a has just moved to the first position, the second pulse electrical signal and the second magnetic field have not yet disappeared. The first magnetic drive end 3241 still temporarily has the S pole polarity, and the second magnetic drive end 3251 still temporarily has the S pole polarity. At this time, the drive part 300 still exists. Figure 14 The first and second closed magnetic circuits are shown, wherein the first closed magnetic circuit can be considered to originate from the second magnetic drive end 3251, and its path is similar to...Figure 14 The path of the first closed magnetic loop is shown. The second closed magnetic loop can be considered to start from the second magnetic driving end 3251, and its path is the same as that of the first closed magnetic loop. Figure 14 The path of the second closed magnetic loop is shown. Therefore, when the armature assembly 310a is just moved to the first position, due to the existence of the first closed magnetic loop and the second closed magnetic loop, and the superposition effect between the two, a greater magnetic attraction force is generated between the first magnetic driving end 3241 and the first attraction part 3111, and between the second magnetic driving end 3251 and the third attraction part 3121.

[0251] When the second pulse electric signal disappears, the second magnetic field disappears, and the first magnetic driving end 3241 and the second magnetic driving end 3251 no longer have the polarity generated by the second magnetic field. At this time, the armature assembly 310a is in a magnetic holding state at the first position as shown. Figure 14

[0252] In summary, the relay of the embodiment of the present application has at least the following advantages and beneficial effects: The relay of the embodiment of the present application, when the short-circuit current passes through the contact part 200, the magnetic attraction force in the direction of the contact pressure can be generated between the first magnetic conductor 410 and the second magnetic conductor 420, the magnetic attraction force acts on the driving part 300, and maintains the stability of the driving part 300, so that the moving contact can resist the electrodynamic repulsion force between the moving and stationary contacts due to the short-circuit current, and further avoid the instantaneous opening of the moving and stationary contacts.

[0253] ​Moreover, since the second magnetic conductor 420 is not arranged on the moving spring sheet, the moving spring sheet can be prevented from being deformed by the magnetic attraction force and pushing the driving part 300 back and causing the driving part 300 to move in the direction of contact disconnection, and the moving and static contacts are prevented from being disconnected and the relay from being disabled. Since the magnetic attraction force between the second magnetic conductor 420 and the first magnetic conductor 410 does not directly act on the moving spring sheet, and the maximum displacement of the second magnetic conductor 420 is limited by the driving part 300, arranging the second magnetic conductor 420 on the driving part 300 can also limit the upper limit of the contact pressure that can be provided. When a fault current occurs, the increased magnetic attraction force between the second magnetic conductor 420 and the first magnetic conductor 410 will not excessively increase the contact pressure between the moving and static contacts, preventing the moving and static contacts from forming excessive contact pressure when they are already generating high heat, thereby reducing the probability of contact welding and sticking and ensuring that the product can be used normally afterwards. At the same time, since the second magnetic conductor 420 is not arranged on the moving spring sheet, even if the first magnetic conductor and the second magnetic conductor 420 are attracted to each other, the moving spring sheet will not be conducted through the first magnetic conductor and the second magnetic conductor 420 and the contact assembly with the static contact, ensuring that the two contact assemblies only contact through the moving and static contacts, and ensuring good contact performance between the two contact assemblies. Furthermore, since the second magnetic conductor 420 is arranged on the driving part 300 and not on the moving spring sheet, the weight of the moving spring sheet will not be increased, and the kinetic energy of the moving spring sheet when moving will not be increased, ensuring the stability of the moving and static contacts when they are in contact, avoiding excessive vibration when the moving and static contacts are in contact, and avoiding the phenomenon of the moving and static contacts bouncing back, which can affect the service life. In addition, since the contact or disconnection of the moving spring sheet and the static contact relies on the elastic deformation ability of the moving spring sheet itself, if the second magnetic conductor 420 is directly arranged on the moving spring sheet, the rigidity of the moving spring sheet will be increased due to the greater rigidity and larger area of the second magnetic conductor 420, and a greater driving force will be required or the moving spring sheet will be prone to misoperation in the closing or disconnection direction without sufficient driving force. Therefore, in the embodiments of the present application, the second magnetic conductor 420 is not arranged on the moving spring sheet, which can also avoid affecting the flexibility of the moving spring sheet, reducing the energy consumption increment, and avoiding misoperation of the relay.

[0254] Furthermore, when the moving contact and the stationary contact are not in contact, that is, during the process of the driving part 300 driving the moving spring to move, the position of the second magnetic conductor 420 relative to the pushing member 310b is stable. Compared with the scheme where the second magnetic conductor 420 is movable relative to the pushing member 310b when the moving contact and the stationary contact are not in contact, this embodiment has at least the following advantages: 1. When the moving contact and the stationary contact are in contact, the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 is stable and always meets the expected requirements, making the short-circuit protection effect more reliable; 2. The second magnetic conductor 420 and the pushing member 310b do not undergo relative displacement or generate friction, avoiding an increase in the relay's pull-in voltage and release voltage; 3. The amount of wear debris on the pushing member 310b is reduced, extending the service life of the relay.

[0255] Furthermore, compared to the scheme of directly mounting the second magnetic conductor 420 on the moving spring, since the pushing member 310b moves linearly or nearly linearly, mounting the second magnetic conductor 420 on the pushing member 310b helps to prevent the second magnetic conductor 420 from tilting, thereby avoiding uneven distribution of the magnetic gap between the first magnetic conductor 410 and the second magnetic conductor 420, which would weaken the magnetic attraction and short-circuit resistance.

[0256] Furthermore, a portion of the first magnetic conductor 410 is designed as a second positioning part 411. The second positioning part 411 is positioned and engaged with the first positioning part 121 of the second housing 120, thereby positioning the first contact unit 210 within the housing 100 without the need for additional positioning components or forming a positioning part at one end of the lead-out terminal. Therefore, the first magnetic conductor 410 in this embodiment not only serves as short-circuit protection but also as a positioning component. This single component performs multiple functions, reducing the number of components required for the relay, simplifying the design and manufacturing process, and contributing to improved production efficiency.

[0257] Furthermore, when the contact portion 200 is in the closed state, the second magnetic conductor 420 can reduce the magnetic gap between itself and the first magnetic conductor 410 based on whether the current value flowing through the contact portion 200 is greater than or equal to a threshold. In this way, the size of the magnetic gap between the second magnetic conductor 420 and the first magnetic conductor 410 can be adjusted based on the magnitude of the current value flowing through the contact portion 200, so as to take into account both short-circuit resistance and overload breaking capacity.

[0258] Further, the swing end 232 is bent to connect to the connecting end 231 in a direction away from the first moving spring leaf 211, so that the compression spring 230 forms a two-section bent structure, the distance between the swing end 232 and the connecting end 231 in the contact separation direction of the moving and stationary contacts is increased, so that the distance between the swing end 232 and the second moving spring leaf 221 is also increased, so that even if the second moving spring leaf 221 is warped to one side of the armature assembly 310a, the end of the second moving spring leaf 221 is not easy to push the pusher 310b, avoiding accidental disconnection of the moving and stationary contacts of the relay.

[0259] Further, the part of the plurality of spring leaves 240 between the first contact group 251 and the second contact group 252 has the bending part 241, and the other part of the plurality of spring leaves 240 is not provided with the bending part 241. On the one hand, the bending part 241 can be used as the rotation fulcrum of the moving spring leaf, facilitating deformation of the movable end of the moving spring leaf. On the other hand, the spring leaf with the bending part 241 increases the flexibility of the overall moving spring leaf, and the spring leaf without the bending part 241 can increase the rigidity of the overall moving spring leaf, which not only ensures smooth deformation of the movable end of the moving spring leaf, but also avoids too large deformation of the moving spring leaf due to the attraction of the two moving spring leaves, thereby avoiding the problem that the end of the moving spring leaf is easy to be warped to push the pusher 310b.

[0260] Further, the bending part 241 of each of the first moving spring leaf 211 and the second moving spring leaf 221 protrudes in a direction close to the other. Compared with protruding outward, the bending part 241 of each moving spring leaf protrudes inward, effectively utilizing the space between the first moving spring leaf 211 and the second moving spring leaf 221, and avoiding occupying too much space.

[0261] Further, the swing center O of the armature assembly 310a and the two driving ends 318 are linearly arranged. When the armature assembly 310a is rotated to the horizontal position (i.e. the line connecting the two driving ends 318 is parallel to the X-axis direction), the swing center O of the armature assembly 310a and the two driving ends 318 are linearly arranged and parallel to the X-axis. When the driving end 318 of the armature assembly 310a in the Y-axis direction is in the horizontal position, the driving end 318 at this time is in the same straight line, and the movement amount of the driving end 318 relative to the pusher 310b in the X-axis direction is smaller, so that the pusher 310b is avoided from generating too much deflection in the X-axis direction, thereby ensuring the stability of the position of the second moving magnet in the X-axis direction, and avoiding the influence of the reduction of the magnetic conduction area of the second moving magnet 420 and the first moving magnet 410 on the short-circuit resistance.

[0262] Further, the movable ends of the two contact assemblies are arranged on the same side of the fixed ends of the two contact assemblies corresponding to the movable ends respectively, and the movable ends of the two contact assemblies are driven by the same driving part 300 to realize switching of the two contact assemblies from the closed state to the disconnected state and from the disconnected state to the closed state, so that the movement space required by the movable ends of the two contact assemblies when closing or separating is located on the same side of the fixed ends of the two contact assemblies, and thus only enough space needs to be reserved on one side of the fixed ends of the two contact assemblies, without reserving space on both sides of the fixed ends of the two contact assemblies, so that the structure of the two contact assemblies and the driving part 300 is designed more compact in the driving direction, thereby significantly reducing the size of the two contact assemblies occupying the internal space of the relay, and being beneficial to miniaturization design of the product.

[0263] It can be understood that the various embodiments / embodiments provided in the application can be combined with each other without contradiction, which will not be illustrated one by one here.

[0264] In the embodiments of the application, the terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, "connecting" can be fixed connection, or movable connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0265] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the purpose of facilitating the description of the embodiments of the application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the embodiments of the application.

[0266] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like 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. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0267] The above merely provides preferred embodiments of the application, and is not intended to limit the application. The application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall fall within the protection scope of the application.

Claims

1. A relay, characterized in that, include: The contact portion includes two contact components, one of which has a stationary contact, and the other contact component has a movable spring and a movable contact. One end of the movable spring is fixed relative to the stationary contact, and the other end is oscillating. The movable contact is located on the movable spring. The driving part is connected to the moving spring to drive the moving spring to swing so that the moving contact contacts or separates from the stationary contact. as well as The short-circuit protection structure includes a first magnetic conductor and a second magnetic conductor, wherein the second magnetic conductor is mounted on the driving part; The first and second magnetic conductors are configured to be magnetized and attract each other when the contact portion is energized, and to apply pressure toward the stationary contact at least to the portion of the drive portion used to drive the moving reed to swing.

2. The relay according to claim 1, characterized in that, The driving part includes a pusher connected to the moving spring; the second magnetic conductor is mounted on the pusher; when the moving contact and the stationary contact are not in contact, the second magnetic conductor is fixed relative to the pusher.

3. A relay according to claim 2, characterized in that, The pushing element moves in a straight line or nearly in a straight line.

4. The relay according to claim 2 or 3, characterized in that, When the moving contact and the stationary contact are in contact, the second magnetic conductor is configured to move toward the first magnetic conductor when the current flowing through the contact portion is greater than or equal to a threshold, so as to reduce the magnetic gap between it and the first magnetic conductor.

5. The relay according to claim 4, characterized in that, The driving part further includes a movable component connected to the pusher, the movable component being configured to move and drive the pusher to move when subjected to an external force; the movable component and the pusher are clearance-fitted along the direction of movement of the pusher to provide the pusher with room to move; The second magnetic conductor is fixed to the pusher.

6. The relay according to claim 5, characterized in that, The movable component is an armature assembly that can be driven by magnetic force. One end of the pusher is in clearance fit with the armature assembly, and the other end is connected to the movable spring.

7. The relay according to claim 5, characterized in that, The second magnetic conductor is located on the side of the moving spring facing the stationary contact.

8. The relay according to claim 5, characterized in that, The first magnetic conductor is fixed to the portion of the contact assembly having the stationary contact that carries current, and along the direction of movement of the pusher, at least a portion of the first magnetic conductor is located on the side of the contact assembly having the stationary contact away from the moving spring.

9. The relay according to claim 5, characterized in that, The pusher and the second magnetic conductor are connected by an integral injection molding method.

10. The relay according to claim 4, characterized in that, The second magnetic conductor is movably mounted on the pusher along the moving direction of the pusher; when the moving contact and the stationary contact are in a non-contact state, and when the moving contact and the stationary contact are in contact and the current value of the contact portion is less than the threshold, the second magnetic conductor is held against the pusher along the disconnection direction of the moving contact based on elastic or magnetic force; when the moving contact and the stationary contact are in contact and the current value of the contact portion is greater than or equal to the threshold, the second magnetic conductor overcomes the elastic or magnetic force and moves toward the first magnetic conductor to reduce the magnetic gap between it and the first magnetic conductor.

11. The relay according to claim 10, characterized in that, The contact assembly having the movable spring also includes a compression spring disposed between the movable spring and the pusher, the compression spring being configured to store energy and provide contact pressure to the movable spring when the contact portion is in a closed state; The second magnetic conductor is located on the side of the compression spring facing away from the first magnetic conductor. The second magnetic conductor is configured to be held against the pusher by the elastic action of the compression spring, and when the current value flowing through the contact portion is greater than or equal to the threshold, it can move relative to the pusher toward the first magnetic conductor and press against the compression spring to increase the deformation of the compression spring.

12. The relay according to claim 1, characterized in that, The relay also includes a housing; the contact portion, the driving portion, and the short-circuit protection structure are disposed within the housing; The first magnetic conductor is fixedly mounted on the housing or the contact assembly having the static contact relative to the stationary contact; or, The first magnetic conductor is movably mounted relative to the stationary contact on the housing or the contact assembly having the stationary contact. When the moving contact and the stationary contact are in a non-contact state, and when the moving contact and the stationary contact are in contact and the current value of the contact portion is less than a threshold, the first magnetic conductor is held against the contact assembly having the stationary contact or the housing along the closing direction of the moving contact based on elastic or magnetic forces. When the moving contact and the stationary contact are in contact and the current value of the contact portion is greater than or equal to the threshold, the first magnetic conductor overcomes the elastic or magnetic forces and moves toward the second magnetic conductor to reduce the magnetic gap between them.

13. The relay according to claim 2 or 3, characterized in that, The contact assembly having the movable spring also includes a compression spring disposed between the movable spring and the pusher. The compression spring is configured to store energy and provide contact pressure to the movable spring when the contact portion is in a closed state. The position where the compression spring acts on the movable spring is located at the location of the movable contact, or the position where the compression spring acts on the movable spring and the pusher are both located between the fixed end of the movable spring and the movable contact, or both are located between the movable contact and the movable end of the movable spring.

14. The relay according to claim 2 or 3, characterized in that, Along the length and width directions of the movable spring, the movement range of the pusher is limited by the contact assembly having the movable spring.

15. The relay according to claim 14, characterized in that, The contact assembly having the movable spring also includes a compression spring disposed between the movable spring and the pusher. The compression spring is configured to provide contact pressure when the contact portion is in a closed state. The compression spring includes a connecting end and a swinging end. The connecting end is fixed to the movable spring, and the swinging end abuts against the pusher. The swinging end has two limiting portions, which are spaced apart along the length direction of the movable spring. At least a portion of the pusher is located between the two limiting portions.

16. The relay according to claim 15, characterized in that, The movable spring and / or the compression spring have a limiting groove, the limiting groove having two groove walls, the two groove walls being arranged opposite each other along the width direction of the movable spring, and at least a portion of the pushing member being located within the limiting groove.

17. The relay according to claim 16, characterized in that, The groove wall has an arc-shaped surface.

18. The relay according to claim 2, characterized in that, It includes two contact portions; the two contact portions are a first contact portion and a second contact portion; the stationary contact, the moving spring, and the moving contact in the first contact portion are a first stationary contact, a second moving spring, and a second moving contact, respectively; the stationary contact, the moving spring, and the moving contact in the second contact portion are a second stationary contact, a first moving spring, and a first moving contact, respectively. The first movable spring has a first fixed end and a first movable end at its two ends, and the first movable contact is located near the first movable end; the first stationary contact is electrically connected to the first fixed end; the second movable spring has a second fixed end and a second movable end at its two ends, and the second movable contact is located near the second movable end; the second stationary contact is electrically connected to the second fixed end. The driving part drives the first moving spring and the second moving spring to move through a pusher, so that the second moving contact is in contact with the first stationary contact and the first moving contact is in contact with the second stationary contact, or the second moving contact is in contact with the first stationary contact and the first moving contact is in contact with the second stationary contact; In this case, both contact portions are in a closed state, at least a portion of the first moving spring and at least a portion of the second moving spring are arranged opposite to each other in the contact separation direction of the moving contact and the stationary contact, and the current flowing through them flows in the same direction. The second moving contact and the first stationary contact form a first contact group, and the first moving contact and the second stationary contact form a second contact group. At least one of the first contact group and the second contact group is provided with the short-circuit protection structure.

19. The relay according to claim 18, characterized in that, The contact assembly having the first movable spring further includes a first compression spring, and the contact assembly having the second movable spring further includes a second compression spring. The first compression spring is disposed between the first movable spring and the corresponding pusher, and the second compression spring is disposed between the second movable spring and the corresponding pusher. The first compression spring and the second compression spring are configured to store energy and provide contact pressure to the first movable spring and the second movable spring respectively when the contact portion is in a closed state. The first compression spring includes a first deformable segment and a second deformable segment. One end of the first deformable segment is connected to the first movable spring plate, and the other end is connected to the second deformable segment. Both the first deformable segment and the second deformable segment are inclined relative to the main plate surface of the first movable spring plate, and the slope of the first deformable segment is greater than the slope of the second deformable segment; and / or, The second compression spring includes a third deformation section and a fourth deformation section. One end of the third deformation section is connected to the second movable spring, and the other end is connected to the fourth deformation section. Both the third deformation section and the fourth deformation section are inclined relative to the main plate surface of the second movable spring, and the slope of the third deformation section is greater than the slope of the fourth deformation section.

20. The relay according to claim 18, characterized in that, The contact assembly having the first stationary contact further includes a first lead-out terminal fixedly connected to the first stationary contact, and the contact assembly having the second stationary contact further includes a second lead-out terminal fixedly connected to the second stationary contact. When the first contact group is provided with the short-circuit protection structure, the corresponding first magnetic conductor is fixed to the surface of the first lead-out terminal facing away from the second moving contact. When the second contact group is provided with the short-circuit protection structure, the corresponding first magnetic conductor is fixed to the surface of the second lead terminal on the side facing away from the first moving contact.

21. The relay according to claim 20, characterized in that, The relay also includes a housing; the inner wall of the housing is provided with a first positioning part; The first magnetic conductor has a second positioning part, which is positioned and engaged with the first positioning part and is also limited to be engaged along the contact separation direction of the moving contact and the stationary contact.

22. The relay according to claim 21, characterized in that, The first positioning part is a groove, and the second positioning part is inserted into the groove.

23. The relay according to claim 22, characterized in that, One end of the first magnetic conductor is bent away from the second magnetic conductor to form the second positioning part.

24. The relay according to claim 20, characterized in that, The driving part and the contact part are arranged along the contact separation direction of the stationary contact and the moving contact; The relay also includes two conductive elements, which are respectively connected to the first lead-out terminal and the second lead-out terminal, and extend from the first lead-out terminal and the second lead-out terminal along the contact separation direction of the stationary contact and the moving contact to the side away from the driving part.

25. The relay according to claim 24, characterized in that, The first moving spring and the second moving spring are arranged along the contact separation direction of the stationary contact and the moving contact, with the second moving spring being closer to the driving part; the first contact group is correspondingly provided with the anti-short circuit structure.

26. The relay according to claim 25, characterized in that, At least one of the first moving spring and the second moving spring has a plurality of stacked leaf springs, and a portion of the plurality of leaf springs located between the first contact group and the second contact group has a bent portion; The curved portion of the first movable spring protrudes toward the direction of the second movable spring, and the curved portion of the second movable spring protrudes toward the direction of the first movable spring.

27. The relay according to claim 25, characterized in that, The driving part includes an armature assembly and two pushers. The armature assembly has two driving ends and is oscillating relative to the first stationary contact. The oscillation center of the armature assembly is linearly arranged with the two driving ends. One end of each of the two pushers is connected to the first moving spring and the second moving spring, respectively, and the other end of each pusher is movably connected to the two driving ends, respectively.

28. The relay according to claim 24, characterized in that, Along the contact separation direction of the stationary contact and the moving contact, the position of the first movable end corresponds to the position of the second fixed end, and the position of the second movable end corresponds to the position of the first fixed end. The first movable end and the second movable end are respectively disposed on the side of the second fixed end and the first fixed end facing the driving part.

29. The relay according to claim 28, characterized in that, The first moving spring and the second moving spring are arranged in a cross pattern, and the cross area is located between the first contact group and the second contact group.

30. The relay according to claim 29, characterized in that, The first movable spring also has a first curved section, and the first fixed end is connected to the first movable end through the first curved section, so that the first movable contact and the first stationary contact on the first movable spring are staggered in the contact separation direction of the movable contact and the stationary contact. The second movable spring also has a second curved section, and the second fixed end is connected to the second movable end through the second curved section, so that the second movable contact and the second stationary contact on the second movable spring are staggered in the contact separation direction of the movable contact and the stationary contact; The first curved segment and the second curved segment are arranged intersectingly.

31. The relay according to claim 30, characterized in that, The first fixed end and the second fixed end are flat and are disposed on the same first plane, which is perpendicular to the contact separation direction of the moving contact and the stationary contact.

32. The relay according to claim 28, characterized in that, Both the first lead-out terminal and the second lead-out terminal are sheet-like structures and are disposed on the same second plane, which is perpendicular to the contact separation direction of the moving contact and the stationary contact.

33. The relay according to claim 1, characterized in that, The driving part includes a coil assembly and an armature assembly. The coil assembly includes a coil frame, a coil winding, an iron core, and two yokes. The coil winding is wound around the outer periphery of the coil frame, and the iron core passes through the coil frame and is surrounded by the coil winding. The two yokes are respectively fixed to the two axial ends of the iron core, and one end of each yoke extends toward the same side of the coil assembly, forming two magnetic drive ends for electromagnetic coupling with the armature assembly.

34. The relay according to claim 33, characterized in that, The relay is a magnetic latching relay.

35. The relay according to claim 1, characterized in that, The drive unit includes a motor.

Images