Relay

Abstract

The invention discloses a relay which comprises a push rod assembly, a movable spring assembly and an elastic assembly. The movable spring assembly comprises a movable spring sheet, the elastic assembly is connected to the movable spring assembly and the push rod assembly, and the elastic assembly is used for providing contact pressure for the movable spring sheet; in the over-travel process, the push rod assembly extrudes the elastic assembly, and the push rod assembly has an over-travel initial position, an over-travel end position and a transition position between the over-travel initial position and the over-travel end position relative to the position of the movable contact spring. In the process that the push rod assembly moves from the over-travel initial position to the transition position, the elastic assembly has a first stiffness coefficient; in the process that the push rod assembly moves from the transition position to the over-travel ending position, the elastic assembly has a second stiffness coefficient, and the first stiffness coefficient is smaller than the second stiffness coefficient.

Description

Technical Field

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

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

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

[0004] In the prior art, in order to ensure good electrical connection between the moving and static contacts, the contact pressure is usually increased, that is, the elastic force of the elastic component is increased. If the elastic force of the elastic component is increased, the power consumption of the coil unit needs to be increased, which contradicts the current trend of pursuing small volume and low power consumption of the coil unit. Summary of the invention

[0005] The embodiment of the present application provides a relay which reduces the power consumption of the coil while ensuring sufficient contact pressure by changing the stiffness coefficient of the elastic component, thereby solving the technical problems existing in the prior art.

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

[0007] Push rod assembly;

[0008] A dynamic spring assembly, including a dynamic spring leaf;

[0009] An elastic component, connected to the dynamic spring component and the push rod component, the elastic component is used to provide contact pressure to the dynamic spring piece;

[0010] Wherein, during the overtravel process, the push rod assembly squeezes the elastic assembly, and the position relative to the movable spring sheet has an overtravel initial position, an overtravel end position, and a transition position between the overtravel initial position and the overtravel end position;

[0011] Wherein, when the push rod assembly moves from the overtravel initial position to the transition position, the elastic assembly has a first stiffness coefficient; when the push rod assembly moves from the transition position to the overtravel end position, the elastic assembly has a second stiffness coefficient, and the first stiffness coefficient is smaller than the second stiffness coefficient.

[0012] According to some embodiments of the present application, the elastic component is a leaf spring, and the leaf spring is connected to the dynamic spring component and the push rod component.

[0013] According to some embodiments of the present application, the relay further includes a pair of static contact lead-out terminals, and the two ends of the movable reed along the first direction are used to contact or separate from the pair of static contact lead-out terminals respectively; the first direction is the arrangement direction of the pair of static contact lead-out terminals;

[0014] The leaf spring comprises a base plate and a spring arm, the base plate is connected to the push rod assembly, and at least one spring arm is respectively provided at both ends of the base plate along the first direction; one end of each spring arm is connected to the base plate, and the other end is connected to the movable spring leaf;

[0015] Wherein, before the push rod assembly moves to the transition position, the spring arm does not contact the push rod assembly; when the push rod assembly moves to the transition position and during the process of moving from the transition position to the over-travel end position, the spring arm abuts against the push rod assembly.

[0016] According to some embodiments of the present application, a protrusion is further provided between one end of each of the spring arms and the base sheet, the protrusion direction of which is away from the movable spring sheet;

[0017] Wherein, before the push rod assembly moves to the transition position, the protrusion does not contact the push rod assembly; when the push rod assembly moves to the transition position and during the process of moving from the transition position to the over-travel end position, the protrusion abuts against the push rod assembly.

[0018] According to some embodiments of the present application, the spring arm is bent from the protruding portion in a direction close to the movable spring sheet, and the spring arms located on both sides of the substrate along the first direction extend in directions away from each other.

[0019] According to some embodiments of the present application, the other end of the spring arm is provided with an abutment portion, and the abutment portion abuts against the movable spring piece;

[0020] There is a first distance between the abutting portions located at both sides of the substrate along the first direction; there is a second distance between the protruding portions located at both sides of the substrate along the first direction, and the first distance is greater than the second distance.

[0021] According to some embodiments of the present application, the protrusion is formed by bending the leaf spring.

[0022] According to some embodiments of the present application, the relay includes a plurality of the dynamic spring assemblies, each of the dynamic spring assemblies includes a dynamic spring sheet, and the plurality of dynamic spring sheets are arranged side by side along a third direction; wherein the movement direction of the dynamic spring sheet is defined as a second direction, and the first direction, the second direction and the third direction are perpendicular to each other;

[0023] A plurality of the spring arms are respectively disposed on both sides of the substrate along the first direction, and the number of the plurality of the spring arms on one side of the substrate corresponds to the number of the plurality of the movable spring sheets.

[0024] According to some embodiments of the present application, the relay further includes:

[0025] A first magnetic conductor is arranged on a side of the movable spring sheet facing away from the elastic component.

[0026] According to some embodiments of the present application, the dynamic spring assembly further includes a second magnetic conductor, which is fixedly connected to a side of the dynamic spring sheet facing the elastic assembly, and the second magnetic conductor is used to form a magnetic circuit with the first magnetic conductor.

[0027] According to some embodiments of the present application, the push rod assembly includes:

[0028] Rod;

[0029] The base is connected to one axial end of the rod; the base is provided with a boss facing the movable spring; and the elastic component is connected to a side surface of the boss facing away from the base.

[0030] According to some embodiments of the present application, the relay further includes a pair of static contact lead-out terminals, and the two ends of the movable reed along the first direction are used to contact or separate from the pair of static contact lead-out terminals respectively; the first direction is the arrangement direction of the pair of static contact lead-out terminals;

[0031] The elastic component is a leaf spring; the leaf spring includes a base and a spring arm, and at least one spring arm is respectively provided at both ends of the base along the first direction; the base is provided with a limiting hole, and a protruding column is protruding from the side surface of the boss facing away from the base, and the protruding column is inserted into the limiting hole, and the side surface of the base facing away from the movable spring sheet abuts against the side surface of the boss facing the movable spring sheet; the end of the spring arm away from the base is connected to the movable spring sheet.

[0032] According to some embodiments of the present application, a protrusion is further provided between one end of each of the spring arms and the base sheet, the protrusion direction of which is away from the movable spring sheet;

[0033] The apex of the protrusion is lower than a surface of the boss facing the movable spring.

[0034] According to some embodiments of the present application, a convex ring is provided on one side surface of the substrate facing the movable spring sheet, the convex ring surrounds the limiting hole, and the inner annular surface of the convex ring is flush with the hole wall of the limiting hole.

[0035] According to some embodiments of the present application, the convex ring is formed by folding the edge of the hole of the limiting hole of the substrate toward a direction close to the movable spring sheet.

[0036] According to some embodiments of the present application, the convex ring is provided with a top surface facing away from the substrate, and a chamfer is provided at a connection between the top surface and the inner annular surface.

[0037] One embodiment of the above application has at least the following advantages or beneficial effects:

[0038] The relay of the embodiment of the present application designs a smaller stiffness coefficient of the elastic component from the initial position of the overtravel to the transition position, and designs a larger stiffness coefficient of the elastic component from the transition position to the end position of the overtravel, so that the relationship curve between the reaction force and the magnetic gap from the initial position of the overtravel to the end position of the overtravel is a broken line segment, so that when the power consumption of the coil is reduced, the suction force will not be less than the reaction force, ensuring the reliable closure of the relay. At the same time, because the stiffness coefficient of the elastic component is larger during the transition position to the end position of the overtravel, when the push rod assembly moves to the end position of the overtravel relative to the moving spring, the reaction force is also larger, thereby increasing the contact pressure.

[0039] In addition, the stiffness coefficient of the elastic component can be increased while maintaining the power consumption of the coil unchanged, and the suction force will not be less than the force. Therefore, the relay of the embodiment of the present application can increase the contact pressure while maintaining the power consumption of the coil unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 is an exploded schematic diagram of a relay according to an exemplary embodiment.

[0041] Figure 2 is a schematic structural diagram of a relay according to an exemplary embodiment, in which a housing and an arc extinguishing unit are omitted.

[0042] Figure 3 yes Figure 2 Section view along AA.

[0043] Figure 4 yes Figure 2 Cross-sectional view along BB.

[0044] Figure 5 Shown is a graph of the relationship between the suction force and the reaction force and the magnetic gap.

[0045] Figure 6 is a schematic structural diagram of a leaf spring according to an exemplary embodiment.

[0046] Figure 7 is a schematic diagram showing a moving assembly in which a contact support is omitted according to an exemplary embodiment, wherein the protrusion does not contact the base.

[0047] Figure 8 yes Figure 7 A local enlarged view of point X1 in the middle.

[0048] Fig. 9 is a schematic diagram showing a moving assembly in which a contact support is omitted according to an exemplary embodiment, wherein the protrusion is in contact with the base.

[0049] Fig.10 yes Fig. 9 A local enlarged view of the X2 point in the middle.

[0050] Fig.11 is a schematic diagram of a moving assembly according to an exemplary embodiment.

[0051] Fig.12 yes Fig.11 Section view along CC.

[0052] Fig.13 yes Fig.12 A partial enlarged view of the X3 point in the middle.

[0053] Fig.14 is an exploded schematic diagram of a moving assembly and a second magnetic conductor according to the first exemplary embodiment.

[0054] Fig.15 is an exploded schematic diagram of a moving assembly and a second magnetic conductor according to a second exemplary embodiment.

[0055] Fig.16 is an exploded schematic diagram of a moving assembly and a second magnetic conductor according to a third exemplary embodiment.

[0056] Fig.17 2 is a schematic diagram showing a moving assembly according to a fourth exemplary embodiment in which the contact support is omitted, wherein the protrusion does not contact the base.

[0057] Fig.18 2 is a schematic diagram showing a moving assembly according to a fifth exemplary embodiment in which the contact support is omitted, wherein the protrusion does not contact the base.

[0058] Fig.192 is a schematic diagram showing a sixth exemplary embodiment in which the contact support is omitted from the moving assembly, wherein the protrusion does not contact the base.

[0059] The reference numerals are described as follows:

[0060] 1. Relay

[0061] 10. Shell

[0062] 11. First shell

[0063] 11a. Exposure hole

[0064] 12. Second shell

[0065] 20. Coil unit

[0066] 21. Coil frame

[0067] 22. Coil

[0068] 30. Arc extinguishing unit

[0069] 31. Arc extinguishing magnet

[0070] 32. Yoke clamp

[0071] 40. Sealing unit

[0072] 1000. Contact container

[0073] 1001. Contact Chamber

[0074] 1002. First through hole

[0075] 1100, Insulation cover

[0076] 1110, Ceramic cover

[0077] 1111, third through hole

[0078] 1120, frame

[0079] 1200, Yoke Iron Plate

[0080] 1210, second through hole

[0081] 2000, static contact terminal

[0082] 3000, dynamic components

[0083] 3100、Dynamic spring assembly

[0084] 3110, moving reed

[0085] 3200, Push rod assembly

[0086] 3210, Push rod

[0087] 3211, base

[0088] 3212, Rod

[0089] 3213, Card

[0090] 3214, convex column

[0091] 3215, Boss

[0092] 3220, contact bracket

[0093] 3221, top wall

[0094] 3222, side wall

[0095] 3223, card hole

[0096] 3300, Elastic Components

[0097] 4000, Magnetic Circuit

[0098] 4300, static iron core

[0099] 4310, through hole

[0100] 4400, Moving Iron Core

[0101] 4500, reset parts

[0102] 5000, Metal Cover

[0103] 6100, first magnetic conductor

[0104] 6200, second magnetic conductor

[0105] 100. Leaf spring

[0106] 110. Substrate

[0107] 111. Limiting hole

[0108] 112.Protruding ring

[0109] 112a, top surface

[0110] 112b, Inner ring

[0111] 113. Chamfer

[0112] 120. Spring arm

[0113] 121. Contact part

[0114] 130. Raised part

[0115] 131. Vertex

[0116] 300. Connectors

[0117] L1, first spacing

[0118] L2, second spacing DETAILED DESCRIPTION

[0119] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0120] In addition, the following will disclose the embodiments of the present invention with the accompanying drawings. For the purpose of clear description, many practical details will be described in the following description. However, it should be understood that these practical details are not intended to limit the present invention.

[0121] Furthermore, in order to achieve the purpose of neatness of the drawings, some conventional structures and components may be depicted in a simple schematic manner in the drawings. In addition, some features in the drawings of the present case may be slightly enlarged or their proportions or sizes may be changed to facilitate the understanding and viewing of the technical features of the present invention, but this is not intended to limit the present invention. The actual size and specifications of the products manufactured according to the contents disclosed in the present invention should be adjusted according to the needs of production, the characteristics of the product itself, and the contents disclosed in the present invention as follows, which is hereby stated.

[0122] like Figure 1 and Figure 2 As shown, the relay 1 of the embodiment of the present application includes a housing 10, a coil unit 20, an arc extinguishing unit 30 and a sealing unit 40. The sealing unit 40 is arranged in the housing 10, and the top of the static contact lead-out end of the sealing unit 40 is exposed to the outer surface of the housing 10 through the exposure hole 11a of the housing 10. The coil unit 20 and the arc extinguishing unit 30 are both arranged in the housing 10.

[0123] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0124] As an example, the housing 10 includes a first shell 11 and a second shell 12, which are connected to form a chamber for accommodating the coil unit 20, the arc extinguishing unit 30 and the sealing unit 40. In the embodiment of the present application, the exposure hole 11a is provided in the first shell 11.

[0125] The arc extinguishing unit 30 is used to extinguish the arc generated between the static contact lead-out end of the sealing unit 40 and the moving reed.

[0126] As an example, the arc extinguishing unit 30 includes two arc extinguishing magnets 31. The arc extinguishing magnets 31 may be permanent magnets, and each arc extinguishing magnet 31 may be substantially rectangular. The two arc extinguishing magnets 31 are respectively arranged on both sides of the sealing unit 40 and are arranged opposite to each other along the length direction of the moving spring piece.

[0127] By providing two arc extinguishing magnets 31 arranged opposite to each other, a magnetic field can be formed around the static contact lead-out terminal and the movable reed piece. Therefore, the arc generated between the static contact lead-out terminal and the movable reed piece will be elongated in a direction away from each other by the effect of the magnetic field, thereby achieving arc extinguishing.

[0128] The arc extinguishing unit 30 also includes two yoke iron clamps 32, and the two yoke iron clamps 32 are arranged corresponding to the positions of the two arc extinguishing magnets 31. In addition, the two yoke iron clamps 32 surround the sealing unit 40 and the two arc extinguishing magnets 31. By designing that the yoke iron clamps 32 surround the arc extinguishing magnets 31, it is possible to prevent the magnetic field generated by the arc extinguishing magnets 31 from diffusing outward and affecting the arc extinguishing effect. The yoke iron clamps 32 are made of soft magnetic material. Soft magnetic materials may include but are not limited to iron, cobalt, nickel, and alloys thereof.

[0129] like Figure 3 and Figure 4 As shown, the sealing unit 40 includes a contact container 1000 , a pair of stationary contact lead terminals 2000 , a moving assembly 3000 and a magnetic circuit portion 4000 .

[0130] It should be noted that the contact container 1000 is a stationary component, which is used to accommodate the contact group and is mainly a housing and has a chamber. In addition, the contact container 1000 can be formed by connecting multiple components in a predetermined assembly manner.

[0131] The contact container 1000 has a contact chamber 1001 therein. The contact container 1000 may include an insulating cover 1100 and a yoke plate 1200 . The insulating cover 1100 is disposed on one side surface of the yoke plate 1200 . The insulating cover 1100 and the yoke plate 1200 together enclose the contact chamber 1001 .

[0132] The insulating cover 1100 includes a ceramic cover 1110 and a frame piece 1120. The ceramic cover 1110 is connected to the yoke iron plate 1200 through the frame piece 1120. The frame piece 1120 can be a metal piece with an annular structure, such as an iron-nickel alloy, and one end of the frame piece 1120 is connected to the opening edge of the ceramic cover 1110, for example, by laser welding, brazing, resistance welding, gluing, etc. The other end of the frame piece 1120 is connected to the yoke iron plate 1200, which can also be done by laser welding, brazing, resistance welding, gluing, etc. A frame piece 1120 is arranged between the ceramic cover 1110 and the yoke iron plate 1200 to facilitate the connection between the ceramic cover 1110 and the yoke iron plate 1200.

[0133] The contact container 1000 also has a pair of first through holes 1002, and the first through holes 1002 are connected to the contact chamber 1001. The first through holes 1002 are used for the static contact lead-out terminal 2000 to pass through. In the embodiment of the present application, the first through holes 1002 are opened on the ceramic cover 1110.

[0134] A pair of static contact lead-out terminals 2000 are connected to the ceramic cover 1110 of the contact container 1000, and at least a portion of each static contact lead-out terminal 2000 is located in the contact chamber 1001. One of the pair of static contact lead-out terminals 2000 serves as a terminal for current inflow, and the other serves as a terminal for current outflow.

[0135] A pair of static contact lead-out terminals 2000 are disposed in a pair of first through holes 1002 in a one-to-one correspondence, and are connected to the ceramic cover 1110 , for example, by welding.

[0136] The bottom of the static contact lead-out terminal 2000 serves as a static contact, and the static contact may be integrally or separately arranged at the bottom of the static contact lead-out terminal 2000 .

[0137] Please continue reading Figure 3 and Figure 4 The dynamic assembly 3000 includes a plurality of dynamic spring assemblies 3100, a push rod assembly 3200 and an elastic assembly 3300 arranged side by side. The dynamic spring assembly 3100 is disposed in the insulating cover 1100 and is mounted on the push rod assembly 3200 through the elastic assembly 3300.

[0138] It is understandable that the number of the movable spring assembly 3100 can be one or more. When the number of the movable spring assembly 3100 is multiple, the multiple movable spring assemblies 3100 are arranged side by side, and the number of contact points formed by the multiple movable spring assemblies 3100 and each static contact lead-out terminal 2000 is multiple, for example, two, three, four, etc.

[0139] It should be noted that, if a pair of static contact lead terminals 2000 and a plurality of dynamic spring assemblies 3100 are regarded as a set of combinations, then the relay of the embodiment of the present application may include multiple sets of combinations.

[0140] Each dynamic spring assembly 3100 includes a dynamic spring piece 3110, and a plurality of dynamic spring pieces 3110 are arranged side by side. The two ends of each dynamic spring piece 3110 along the first direction D1 are respectively used to contact or separate with a pair of static contact lead-out terminals 2000. The first direction D1 is the arrangement direction of the pair of static contact lead-out terminals 2000.

[0141] Each movable spring piece 3110 may include a movable spring body and movable contacts disposed at both ends of the movable spring body. The movable contacts may be separate parts and connected to the movable spring body. Of course, the movable contacts may also be integrally formed on the movable spring body.

[0142] In the embodiment of the present application, the moving assembly 3000 includes two moving reeds 3110 arranged side by side. One end of the two moving reeds 3110 is used to contact or separate with the static contact of one of the static contact lead-out terminals 2000, and the other end of the two moving reeds 3110 is used to contact or separate with the static contact of the other static contact lead-out terminal 2000. Further, one end of the two moving reeds 3110 forms two contact points with one of the static contact lead-out terminals 2000, and the other end of the two moving reeds 3110 forms two contact points with the other static contact lead-out terminal 2000.

[0143] In other embodiments, the number of the movable reed pieces 3110 may also be one, three, four, five, etc.

[0144] It can be understood that the moving assembly 3000 includes a plurality of moving reeds 3110, and the two ends of the plurality of moving reeds 3110 along the first direction D1 are respectively in contact with or separated from a pair of static contact lead-out terminals. Since the plurality of moving reeds 3110 will not restrict each other, the two ends of the plurality of moving reeds 3110 along the first direction D1 are respectively in contact with a pair of static contact lead-out terminals 2000 to form a reliable parallel circuit. The number of contact points formed by the plurality of moving reeds 3110 and a static contact lead-out terminal 2000 is greater than or equal to two, achieving a shunting effect. In addition, according to the principle that the magnitude of the electric repulsive force is proportional to the square of the current, the magnitude of the electric repulsive force of each contact is significantly reduced, which is conducive to the improvement of the short-circuit resistance and the reliability of the relay.

[0145] Each movable spring assembly 3100 further includes a second magnetic conductor 6200, which is fixedly connected to a side of the movable spring piece 3110 facing away from the static contact lead-out terminal 2000. The function of the second magnetic conductor 6200 will be described in detail below.

[0146] like Figure 3 and Figure 4As shown, the movement direction of the movable spring piece 3110 is defined as the second direction D2, and the direction perpendicular to the first direction D1 and the second direction D2 is defined as the third direction D3. The push rod assembly 3200 includes a push rod 3210 and a contact bracket 3220. The contact bracket 3220 includes a top wall 3221 and two side walls 3222, one end of the two side walls 3222 is respectively connected to the two side edges of the top wall 3221 along the third direction D3, and the other end of the two side walls 3222 is connected to the push rod 3210, that is, the contact bracket 3220 forms an inverted U-shaped structure. A plurality of movable spring pieces 3110 are installed in the space surrounded by the contact bracket 3220 through the elastic component 3300.

[0147] A clamping hole 3223 is provided at the bottom end of each side wall 3222 of the contact support 3220. The push rod 3210 includes a base 3211 and a rod portion 3212, and the base 3211 is connected to one axial end of the rod portion 3212. Clamps 3213 are provided on both sides of the base 3211, and the two clamps 3213 are respectively clamped into the two clamping holes 3223 of the contact support 3220, so as to fix the base 3211 and the contact support 3220. The elastic component 3300 is provided between the plurality of movable spring pieces 3110 and the base 3211, and is used to apply an elastic force to the plurality of movable spring pieces 3110 to move toward the top wall 3221, so as to provide contact pressure.

[0148] In other embodiments, the contact holder 3220 may also be other structures, which are not listed here one by one.

[0149] It is understandable that the elastic component 3300 can be used to flexibly support multiple movable reeds 3110 to provide contact pressure.

[0150] Of course, in other embodiments, the push rod assembly 3200 may also adopt other structures, which will not be described here.

[0151] The plurality of movable spring pieces 3110 are arranged side by side along the third direction D3.

[0152] Please continue reading Figure 3 and Figure 4 The yoke plate 1200 has a second through hole 1210, which penetrates two opposite sides of the yoke plate 1200 along the thickness direction of the yoke plate 1200, and the second through hole 1210 is connected to the contact chamber 1001 of the contact container 1000. The rod portion 3212 is movably disposed in the second through hole 1210 along the axial direction. The base 3211 at one axial end of the rod portion 3212 is disposed in the contact chamber 1001.

[0153] The sealing unit 40 further includes a metal cover 5000, which is connected to the side of the yoke plate 1200 facing away from the insulating cover 1100, and the metal cover 5000 covers the second through hole 1210 on the yoke plate 1200. The metal cover 5000 and the yoke plate 1200 enclose a chamber for accommodating the static iron core 4300 and the moving iron core 4400 of the magnetic circuit part 4000.

[0154] Return to Reference Figure 1 The coil unit 20 includes a coil frame 21 and a coil 22. The coil frame 21 is hollow and cylindrical and is made of insulating material. The metal cover 5000 is inserted into the coil frame 21. The coil 22 surrounds the coil frame 21.

[0155] like Figure 3 and Figure 4 As shown, the magnetic circuit part 4000 includes a static iron core 4300, a moving iron core 4400 and a reset member 4500. The static iron core 4300 is fixedly arranged in the metal cover 5000, and part of the static iron core 4300 extends into the second through hole 1210. The static iron core 4300 has a through hole 4310, and the through hole 4310 is arranged corresponding to the position of the second through hole 1210, for the rod portion 3212 to pass therethrough. The moving iron core 4400 is movably arranged in the metal cover 5000, and is arranged opposite to the static iron core 4300 along the axial direction of the rod portion 3212. The moving iron core 4400 is connected to the rod portion 3212, and is used to be attracted by the static iron core 4300 when the coil 22 is energized. The moving iron core 4400 and the rod portion 3212 can be connected by screwing, riveting, welding or other methods.

[0156] The reset member 4500 is located inside the metal cover 5000 and is disposed between the static iron core 4300 and the moving iron core 4400, and is used to reset the moving iron core 4400 when the coil 22 is powered off. The reset member 4500 can be a spring and is sleeved on the outside of the rod 3212.

[0157] It should be noted that when the coil 22 is energized, the static iron core 4300 attracts the moving iron core 4400 to move upward, and the moving iron core 4400 can drive the push rod assembly 3200 to move upward through the rod portion 3212. When the moving spring piece 3110 contacts the static contact lead-out end 2000, the moving spring piece 3110 is stopped by the static contact lead-out end 2000, while the rod portion 3212 and the base 3211 will continue to move upward until the overtravel is completed.

[0158] During the overtravel process, the base 3211 will squeeze the elastic component 3300. After being squeezed, the elastic component 3300 can provide elastic force to the movable reed 3110 to provide contact pressure.

[0159] Please continue reading Figure 3 and Figure 4The relay 1 also includes a first magnetic conductor 610, which is used to form a suction force on the moving reed 3110 in the direction of contact closing. The suction force can resist the electromotive repulsion between the moving reed 3110 and the static contact lead-out terminal 2000 due to the short-circuit current, thereby preventing the moving reed 3110 and the static contact lead-out terminal 2000 from bouncing apart.

[0160] In one embodiment, the first magnetic conductor 6100 is disposed on a side of the movable reed 3110 facing away from the elastic component 3300 . In other words, the first magnetic conductor 6100 is disposed on a side of the movable reed 3110 facing the static contact lead-out terminal 2000 .

[0161] It is understandable that when the moving spring piece 3110 is energized, the first magnetic conductor 6100 is magnetized, thereby forming a suction force on the moving spring piece 3110 in the direction of contact closing, thereby achieving the purpose of anti-short circuit.

[0162] Further, the movable spring assembly 3100 may further include a second magnetic conductor 6200, which is fixedly connected to the side of the movable spring piece 3110 facing the elastic assembly 3300. In other words, the second magnetic conductor 6200 is fixedly connected to the side of the movable spring piece 3110 facing away from the static contact lead-out end 2000. The second magnetic conductor 6200 is used to form a magnetic circuit with the first magnetic conductor 6100.

[0163] The number of the second magnetic conductors 6200 corresponds to the number of the movable spring pieces 3110. In the embodiment of the present application, the number of the second magnetic conductors 6200 is two, but not limited thereto. The two second magnetic conductors 6200 are respectively fixedly connected to the side of the two movable spring pieces 3110 facing away from the static contact lead-out end 2000.

[0164] When both ends of the moving spring piece 3110 are in contact with a pair of static contact lead-out terminals 2000, current flows through the moving spring piece 3110, thereby forming a magnetic conductive loop around the moving spring piece 3110 between the first magnetic conductive body 6100 and the second magnetic conductive body 6200. When the short-circuit current passes through the moving spring piece 3110, an attractive force is generated between the first magnetic conductive body 6100 and the second magnetic conductive body 6200 in the direction of contact pressure, and the attractive force can resist the electromotive repulsion force generated by the short-circuit current between the moving spring piece 3110 and the static contact lead-out terminals 2000, thereby preventing the moving spring piece 3110 and the static contact lead-out terminals 2000 from being bounced apart.

[0165] It is understandable that the first magnetic conductor 6100 and the second magnetic conductor 6200 may be in a straight line or a U-shape. The first magnetic conductor 6100 and the second magnetic conductor 6200 may be made of soft magnetic materials such as iron, cobalt, nickel, and alloys thereof.

[0166] like Figure 3 and Figure 4As shown, the first magnetic conductor 6100 is disposed in the contact container 1000 and is fixed relative to the contact container 1000. In this way, the suction force for resisting short circuit is transferred to the contact container 1000. Since the contact container 1000 is a stationary component, there is no need for excessive coil holding force, thereby reducing the power consumption of the coil of the relay 1 and the volume of the relay 1, and improving the short circuit resistance.

[0167] Furthermore, the first magnetic conductor 6100 is connected to the ceramic cover 1110 of the insulating cover 1100 through the connector 300. The ceramic cover 1110 of the insulating cover 1100 is provided with a third through hole 1111; the connector 300 is rod-shaped and penetrates the third through hole 1111; one end of the connector 300 is connected to the insulating cover 1100, and the other end is connected to the first magnetic conductor 6100.

[0168] The connection between one axial end of the connector 300 and the ceramic cover 1110 can be implemented in various ways, such as welding, riveting, screwing, bonding, etc. The connection between the other end of the connector 300 and the first magnetic conductor 6100 can also be implemented in various ways, such as welding, riveting, screwing, bonding, clamping, etc.

[0169] It can be understood that when one end of the connector 300 is connected to the ceramic cover 1110 by welding, by welding the connector 300 to the top wall of the ceramic cover 1110, the metallization layer can be processed only on the periphery of the third through hole 1111 on the outer wall surface of the top wall, without the need to process the metallization layer on the inner wall surface of the top wall, which facilitates processing and simplifies the processing steps.

[0170] It is understandable that one end of the connector 300 may be connected to the outer wall surface of the ceramic cover 1110 , may be connected to the inner wall surface of the ceramic cover 1110 , or may be connected to both the outer wall surface and the inner wall surface of the ceramic cover 1110 .

[0171] It can be seen from this that the first magnetic conductor 6100 is connected to the ceramic cover 1110 through the connecting piece 300. On the one hand, the anti-short circuit suction force is transferred to the ceramic cover 1110, so there is no need for excessive coil holding force, thereby reducing the power consumption of the coil of the relay 1 and the volume of the relay 1, and improving the short circuit resistance; on the other hand, since the connecting piece 300 is connected to the ceramic cover 1110, it will not occupy too much space in the contact chamber, thereby ensuring the arc extinguishing space of the arc extinguishing assembly and the activity space of the push rod.

[0172] In addition, the first magnetic conductor 6100 is connected to the rod-shaped connecting member 300, so that a variety of connection methods can be used between the first magnetic conductor 6100 and the connecting member 300, such as riveting, laser welding, clamping, gluing, etc., which enriches the connection methods.

[0173] As an example, the connecting member 300 is a solid rod. In this way, the connecting member 300 and the first magnetic conductor 6100 can be connected by riveting, making the connection more reliable. In addition, the solid rod has a higher support strength and is less prone to deformation.

[0174] Of course, the first magnetizer 6100 can also be fixedly disposed in the contact container 1000 in the following manner: the first magnetizer 6100 is fixedly disposed in the contact container 1000 via a fixing bracket (not shown in the figure). Specifically, the fixing bracket is disposed in the contact container 1000 and fixedly connected to the yoke iron plate 1200, and the first magnetizer 6100 is fixedly connected to the fixing bracket.

[0175] In addition, the first magnetic conductor 6100 may also be fixedly connected to the inner side of the top wall 3221 of the contact support 3220 to form a follow-up anti-short circuit structure.

[0176] In another embodiment, the distance between the first magnetizer 6100 and the second magnetizer 6200 can be designed to be variable. Specifically, the distance between the first magnetizer 6100 and the second magnetizer 6200 can be adjusted according to the magnitude of the current value, thereby changing the magnitude of the magnetic attraction generated between the first magnetizer 6100 and the second magnetizer 6200, while meeting the requirements of short circuit resistance and overload disconnection.

[0177] Optionally, the first magnetic conductor 6100 may include a plurality of stacked magnetic conductors. It is understood that by increasing the number of thinner magnetic conductors, the overall thickness of the first magnetic conductor 6100 may be increased. On the one hand, the magnetic conductors are thinner and can be made of thin strips, so the material cost is low and easy to operate. On the other hand, the number of magnetic conductors can be flexibly adjusted according to the size of the short-circuit current.

[0178] It is understandable that the process of switching the relay 1 from being completely disconnected to being completely closed can be divided into two stages: the first stage is that the moving iron core 4400 drives the moving reed 3110 to move upward through the push rod assembly 3200 until the moving reed 3110 just contacts the static contact lead-out terminal 2000. In the first stage, the suction force provided by the static iron core 4300 to the moving iron core 4400 increases slowly, and needs to be always greater than the sum of the elastic force provided by the reset member 4500 and the push rod assembly 3200 and the gravity of the moving iron core 4400. The second stage is that after the moving reed 3110 contacts the static contact lead-out terminal 2000, the moving iron core 4400 will not stop moving, but the moving iron core 4400 will continue to drive the push rod assembly 3200 to move upward until the moving iron core 4400 contacts the static iron core 4300 (the second stage is the overtravel process). In the second stage, the elastic assembly 3300 is squeezed by the push rod assembly 3200 and can provide elastic force. Therefore, the suction force provided by the static iron core 4300 to the moving iron core 4400 needs to be greater than the sum of the elastic force provided by the reset member 4500, the push rod assembly 3200, the weight of the moving iron core 4400 itself and the elastic force provided by the elastic assembly 3300.

[0179] For ease of understanding, you can combine Figure 5 Let's explain further. It should be noted that Figure 5 The graphs are showing the relationship between the suction force, the reaction force and the magnetic gap, wherein curve 1 shows the relationship between the suction force and the magnetic gap, and curve 2 shows the relationship between the reaction force and the magnetic gap of the relay 1 in the prior art.

[0180] according to Figure 5 It can be seen that during the whole process of switching the relay 1 from fully disconnected to fully closed, the suction force increases exponentially as the magnetic gap between the static iron core 4300 and the moving iron core 4400 gradually decreases, and the change of the reaction force can be divided into two stages. Before the moving spring piece 3110 does not contact the static contact lead-out terminal 2000, the reaction force only includes the elastic force provided by the reset member 4500 and the self-weight of the push rod assembly 3200 and the moving iron core 4400. As the magnetic gap gradually decreases, after the moving spring piece 3110 contacts the static contact lead-out terminal 2000, the elastic force provided by the elastic assembly 3300 will also be added to the reaction force, so the curve 2 representing the reaction force has a turning point where the reaction force increases suddenly.

[0181] Further based on Figure 5 It can be seen that no matter what the size of the magnetic gap is, the suction force must always be greater than the reaction force.

[0182] As described in the background art, if the contact pressure is to be increased, the power consumption and volume of the coil need to be increased, which contradicts the current development trend of low power consumption and small volume of the coil.

[0183] In addition, if Figure 5As shown, Figure 5 Curve 3 in the figure shows the relationship between the suction force and the magnetic gap after the coil power consumption is reduced. If the contact pressure is kept unchanged and the coil power consumption is directly reduced (the smaller the coil power consumption, the smaller the suction force), then during the entire contact closing process, there will be a moment when the suction force is smaller than the reaction force (that is, the suction force and the reaction force do not match), causing the relay 1 to fail to close.

[0184] It can be seen that in the prior art, the contact pressure and the coil power consumption cannot be taken into account at the same time, which obviously affects the development of the relay 1.

[0185] Based on this, an embodiment of the present application provides a relay 1, in which the stiffness coefficient of the elastic component 3300 is designed to be variable, which reduces the power consumption of the coil without affecting the matching of the suction and reaction forces, and can also ensure a sufficiently large contact pressure.

[0186] During the overtravel process, the push rod assembly 3200 squeezes the elastic assembly 3300 and has an overtravel initial position, an overtravel end position and a transition position between the overtravel initial position and the overtravel end position relative to the position of the movable reed 3110 .

[0187] Among them, when the push rod assembly 3200 moves from the initial position of the overtravel to the transition position, the elastic assembly 3300 has a first stiffness coefficient; when the push rod assembly 3200 moves from the transition position to the end position of the overtravel, the elastic assembly 3300 has a second stiffness coefficient, and the first stiffness coefficient is smaller than the second stiffness coefficient.

[0188] It should be noted that the over-travel initial position refers to the position of the push rod assembly 3200 relative to the moving reed 3110 when the push rod assembly 3200 drives the moving reed 3110 to just contact the static contact lead-out terminal 2000; the over-travel end position refers to the position of the push rod assembly 3200 relative to the moving reed 3110 after the moving iron core 4400 contacts the static iron core 4300 (that is, the magnetic gap is equal to zero).

[0189] In the embodiment of the present application, before the push rod assembly 3200 moves from the initial position of the overtravel to the transition position relative to the movable reed 3110, the elastic assembly 3300 has a first stiffness coefficient. During the process of the push rod assembly 3200 moving from the transition position to the end position of the overtravel relative to the movable reed 3110, the elastic assembly 3300 has a second stiffness coefficient. Since the first stiffness coefficient is less than the second stiffness coefficient, during the overtravel process of the push rod assembly 3200 squeezing the elastic assembly 3300, the relationship curve between the reaction force and the magnetic gap is a broken line (such as Figure 5 Curve 4).

[0190] It should be noted that the first half of curve 4 (i.e., the stage before the push rod assembly 3200 drives the moving spring 3110 to move and contacts the static contact lead-out terminal 2000) overlaps with the first half of curve 2. Therefore, in the following description of curve 4, only the difference between curve 4 and curve 2 is introduced, and the part overlapping with curve 2 is not repeated.

[0191] like Figure 5 As shown, in the prior art, when the push rod assembly 3200 is located at the initial position of the overtravel, it corresponds to point A of curve 2; when the push rod assembly 3200 is located at the end position of the overtravel, it corresponds to point B of curve 2.

[0192] In the embodiment of the present application, when the push rod assembly 3200 is at the initial position of the overtravel, it corresponds to point A' of curve 4 (A' coincides with A); when the push rod assembly 3200 is at the end position of the overtravel, it corresponds to point B' of curve 4, wherein the reaction force corresponding to point B' is greater than the reaction force corresponding to point B; when the push rod assembly 3200 is at the transition position, it corresponds to point C of curve 4.

[0193] It can be seen that the relationship curve between the reaction force and the magnetic gap in the prior art is a straight line segment AB, while the relationship curve between the reaction force and the magnetic gap in the embodiment of the present application is a broken line segment A'CB'. The slope of the A'C segment is smaller than the slope of the AB segment, and the slope of the AB segment is smaller than the slope of the CB' segment.

[0194] In the embodiment of the present application, since the slope of the A'C line segment is smaller than the slope of the AB line segment, and the slope of the CB' line segment is larger than the slope of the AB line segment, curve 3 does not intersect with A'CB', but curve 3 is always located above curve 4. Therefore, during the entire process of contact closure, the suction force will not be smaller than the reaction force (i.e., the suction force and the reaction force do not match).

[0195] It can be seen that the relay 1 of the embodiment of the present application designs the stiffness coefficient of the elastic component 3300 from the initial position of the overtravel to the transition position to be smaller, and designs the stiffness coefficient of the elastic component 3300 from the transition position to the end position of the overtravel to be larger, so that the relationship curve between the reaction force and the magnetic gap from the initial position of the overtravel to the end position of the overtravel is a broken line segment, so that when the power consumption of the coil is reduced, the suction force will not be less than the reaction force, ensuring that the relay 1 is reliably closed. At the same time, since the stiffness coefficient of the elastic component 3300 is larger during the transition position to the end position of the overtravel, when the push rod component 3200 moves to the end position of the overtravel relative to the moving spring 3110, the reaction force is also larger, thereby increasing the contact pressure.

[0196] Also, please read Figure 5If the power consumption of the coil remains unchanged, that is, the relationship curve between the suction force and the magnetic gap is still curve 1, then under the premise of ensuring that the suction force is greater than the reaction force, curve 4 can be moved up, that is, the reaction force value is increased. Therefore, the relay 1 of the embodiment of the present application can increase the reaction force while maintaining the power consumption of the coil unchanged, thereby increasing the contact pressure.

[0197] like Figures 6 to 10 As shown, the elastic component 3300 is a leaf spring 100, and the leaf spring 100 is connected to the movable spring 3110 and the push rod assembly 3200. The leaf spring 100 includes a base 110 and a spring arm 120, and the base 110 is connected to the base 3211 of the push rod assembly 3200. At least one spring arm 120 is respectively provided at both ends of the base 110 along the first direction D1. One end of each spring arm 120 is connected to the base 110, and the other end is connected to the movable spring 3110. Before the push rod assembly 3200 moves to the transition position, the spring arm 120 does not contact the push rod assembly 3200; when the push rod assembly 3200 moves to the transition position and in the process of moving from the transition position to the overtravel end position, the spring arm 120 abuts against the push rod assembly 3200.

[0198] It can be understood that when the spring arm 120 is not in contact with the push rod assembly 3200, the force arm of the spring arm 120 is longer and the stiffness coefficient is smaller; when the spring arm 120 is in contact with the push rod assembly 3200, the force arm of the spring arm 120 becomes smaller and the stiffness coefficient becomes larger.

[0199] like Figures 6 to 10 As shown, in one embodiment, a protrusion 130 is provided between one end of each spring arm 120 and the base plate 110 , and the protrusion direction faces away from the movable spring piece 3110 , and the other end of each spring arm 120 abuts against the movable spring piece 3110 .

[0200] Before the push rod assembly 3200 moves to the transition position, the protrusion 130 does not contact the push rod assembly 3200; when the push rod assembly 3200 moves to the transition position and during the process of moving from the transition position to the over-travel end position, the protrusion 130 abuts against the push rod assembly 3200.

[0201] It can be understood that when the protrusion 130 does not contact the push rod assembly 3200, the force arm of the spring arm 120 is longer, and the stiffness coefficient is smaller; when the protrusion 130 abuts against the push rod assembly 3200, the force arm of the spring arm 120 becomes smaller, and the stiffness coefficient becomes larger.

[0202] The spring arm 120 is bent from the protrusion 130 toward the direction close to the movable spring piece 3110, and the spring arms 120 located on both sides of the substrate 110 along the first direction D1 extend in directions away from each other. The other end of the spring arm 120 is provided with a contact portion 121, and the contact portion 121 contacts the movable spring piece 3110; there is a first spacing L1 between the contact portions 121 located on both sides of the substrate 110 along the first direction D1; there is a second spacing L2 between the protrusions 130 located on both sides of the substrate 110 along the first direction D1, and the first spacing L1 is greater than the second spacing L2. The spring arms 120 on both sides of the substrate 110 are symmetrically arranged along the first direction D1, and the protrusions 130 on both sides of the substrate 110 are symmetrically arranged along the first direction D1.

[0203] Of course, in another embodiment, the method of changing the stiffness coefficient of the spring arm 120 can also be: no protrusion 130 is provided between one end of each spring arm 120 and the base sheet 110, but a protrusion is provided on the surface of the side of the base 3211 facing the leaf spring 100. Before the push rod assembly 3200 moves to the transition position, the protrusion does not contact the leaf spring 100, at which time the force arm of the leaf spring 100 is longer and the stiffness coefficient is smaller; when the push rod assembly 3200 moves to the transition position and during the process of moving from the transition position to the overtravel end position, the protrusion contacts the leaf spring 100, at which time the force arm of the leaf spring 100 becomes smaller and the stiffness coefficient becomes larger.

[0204] like Fig.11 and Fig.12 As shown, the base 3211 is provided with a boss 3215 facing the movable spring piece 3110; the base 110 of the elastic component 3300 is connected to the side surface of the boss 3215 facing away from the base 3211. The base 110 is provided with a limiting hole 111, and the side surface of the boss 3215 facing away from the base 3211 is provided with a boss 3214, which is inserted into the limiting hole 111, and the side surface of the base 110 facing away from the movable spring piece 3110 is in contact with the side surface of the boss 3215 facing the movable spring piece 3110.

[0205] The shape of the limiting hole 111 can have various embodiments. When one limiting hole 111 is provided on the substrate 110, the shape of the limiting hole 111 can be a non-circular shape such as a rectangle, an ellipse or a triangle, which can prevent the base 3211 and the substrate 110 from rotating relative to each other, thereby achieving an anti-rotation effect. When two or more (including two) limiting holes 111 are provided on the substrate 110, the shape of the limiting hole 111 can be circular or non-circular.

[0206] like Figure 6 and Fig.13As shown, a convex ring 112 is provided on one side of the substrate 110 facing the movable spring piece 3110, the convex ring 112 surrounds the limiting hole 111, and the inner ring surface 112b of the convex ring 112 is flush with the hole wall of the limiting hole 111. Further, the convex ring 112 is formed by folding the hole edge of the limiting hole 111 of the substrate 110 toward the direction close to the movable spring piece 3110.

[0207] By providing a convex ring 112 on the edge of the limiting hole 111 , the friction between the convex column 3214 and the substrate 110 can be reduced when the substrate 110 and the base 3211 are assembled, and the generation of scraps can be prevented.

[0208] The convex ring 112 is provided with a top surface 112a facing away from the substrate 110, and a chamfer 113 is provided at the connection between the top surface 112a and the inner ring surface 112b. By providing the chamfer 113 at the connection between the top surface 112a and the inner ring surface 112b, burrs generated during the molding process of the convex ring 112 can be eliminated, and scraps can be further prevented from being generated between the convex column 3214 and the inner ring surface 112b of the convex ring 112.

[0209] like Figure 7 and Fig. 9 As shown, the vertex 131 of the protrusion 130 is lower than the side surface of the boss 3215 facing the movable spring piece 3110. In other words, the distance between the vertex 131 of the protrusion 130 and the side surface of the movable spring piece 3110 facing the base 3211 is greater than the distance between the boss 3215 and the two surfaces of the movable spring piece 3110 facing each other.

[0210] In the embodiments of the present application, Figure 7 As shown, before the push rod assembly 3200 moves from the over-travel initial position to the transition position relative to the movable spring leaf 3110, the protrusion 130 is not in contact with the base 3211 of the push rod assembly 3200. At this time, the vertical distance from the line of action of the reaction force of the movable spring leaf 3110 on the leaf spring 100 to the contact position between the base 110 and the boss 3215 is L3. Then, before the push rod assembly 3200 moves from the over-travel initial position to the transition position, the force arm of the movable spring leaf 3110 on the leaf spring 100 is L3.

[0211] like Fig. 9 As shown, during the process of the push rod assembly 3200 moving from the transition position to the overtravel end position relative to the movable spring leaf 3110, the protrusion 130 abuts against the base 3211. At this time, the vertical distance from the line of action of the reaction force of the movable spring leaf 3110 on the leaf spring 100 to the abutment position of the protrusion 130 and the base 3211 is L4. Therefore, during the process of the push rod assembly 3200 moving from the transition position to the overtravel end position, the force arm of the movable spring leaf 3110 acting on the leaf spring 100 is L4. Among them, L4 is smaller than L3.

[0212] As described above, the contact portions 121 on both sides of the substrate 110 along the first direction D1 have a first spacing L1, and the protrusions 130 on both sides of the substrate 110 along the first direction D1 have a second spacing L2. Then, L3 is equal to L1 / 2, and L4 is equal to (L1-L2) / 2.

[0213] In one embodiment, the protrusion 130 is formed by bending the leaf spring 100 , but the present invention is not limited thereto.

[0214] like Fig.14 As shown, a plurality of spring arms 120 are respectively provided on both sides of the substrate 110 along the first direction D1, the number of the plurality of spring arms 120 on one side of the substrate 110 corresponds to the number of the plurality of movable spring pieces 3110, and the other ends of the plurality of spring arms 120 are respectively abutted against one end of the plurality of movable spring pieces 3110.

[0215] In a specific embodiment, the number of the movable spring pieces 3110 and the number of the second magnetic conductors 6200 are both two, two spring arms 120 are respectively provided on both sides of the substrate 110 along the first direction D1, and the two spring arms 120 on one side of the substrate 110 are arranged side by side along the third direction D3.

[0216] Of course, in another embodiment, there are multiple leaf springs 100, and the number of leaf springs 100 corresponds to the number of movable springs 3110. A spring arm 120 is provided on both sides of the base plate 110 of each leaf spring 100 along the first direction D1, and one leaf spring 100 corresponds to one movable spring 3110.

[0217] like Fig.15 As shown, the similarities between the second embodiment and the first embodiment are not repeated here, and the differences between the second embodiment and the first embodiment are as follows:

[0218] The number of the movable spring piece 3110 and the number of the second magnetic conductor 6200 are both one, and a spring arm 120 is respectively provided on both sides of the substrate 110 along the first direction D1.

[0219] like Fig.16 As shown, the similarities between the third embodiment and the first embodiment are not repeated here, and the differences are as follows:

[0220] The number of the movable spring pieces 3110 and the number of the second magnetic conductors 6200 are both three, and three spring arms 120 are respectively disposed on both sides of the substrate 110 along the first direction D1.

[0221] like Fig.17 As shown, the similarities between the fourth embodiment and the first embodiment are not repeated here, and the differences are as follows:

[0222] The end of the spring arm 120 of the leaf spring 100 away from the base plate 110 is connected to the movable spring 3110 through an anti-rotation structure. The anti-rotation structure is used to limit the relative rotation between the leaf spring 100 and the movable spring 3110 around the axis of the push rod assembly 3200.

[0223] In one embodiment, the anti-rotation structure may be a combination of a limiting hole and a limiting protrusion; in another embodiment, the anti-rotation structure may also be a riveted structure, and the end of the spring arm 120 away from the substrate 110 is riveted to the movable spring piece 3110; in yet another embodiment, the anti-rotation structure may also be a welded structure, and the end of the spring arm 120 away from the substrate 110 is welded to the movable spring piece 3110.

[0224] In addition, the shape of the leaf spring 100 of the fourth embodiment is also different from that of the leaf spring 100 of the first embodiment. In this embodiment, the ends of the spring arms 120 on both sides of the base sheet 110 along the first direction D1 are gathered toward the middle.

[0225] like Fig.18 As shown, the similarities between the fifth embodiment and the fourth embodiment are not repeated here, and the differences between the fifth embodiment and the fourth embodiment are as follows:

[0226] The leaf spring 100 of the fifth embodiment has a different shape from the leaf spring 100 of the fourth embodiment. In this embodiment, the bending path of the spring arm 120 is an arc, and the spring arm 120 is connected to the second magnetic conductor 6200 .

[0227] The first distance L1 is not greater than the second distance L2.

[0228] like Fig.19 As shown, the same points as those of the fourth embodiment will not be described in detail, and the difference between the sixth embodiment and the fourth embodiment is as follows:

[0229] The leaf spring 100 is mounted on the movable spring piece 3110 , and the base plate 110 of the leaf spring 100 abuts against a surface of the boss 3215 facing the movable spring piece 3110 .

[0230] It is understandable that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0231] In the application embodiments, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0232] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0233] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0234] The above are only preferred embodiments of the application embodiments and are not intended to limit the application embodiments. For those skilled in the art, the application embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A relay, characterized in that: include: Push rod assembly; A dynamic spring assembly, including a dynamic spring leaf; An elastic component, connected to the dynamic spring component and the push rod component, the elastic component is used to provide contact pressure to the dynamic spring piece; Wherein, during the overtravel process, the push rod assembly squeezes the elastic assembly, and the position relative to the movable spring sheet has an overtravel initial position, an overtravel end position, and a transition position between the overtravel initial position and the overtravel end position; Wherein, when the push rod assembly moves from the overtravel initial position to the transition position, the elastic assembly has a first stiffness coefficient; when the push rod assembly moves from the transition position to the overtravel end position, the elastic assembly has a second stiffness coefficient, and the first stiffness coefficient is smaller than the second stiffness coefficient.

2. The relay according to claim 1, characterized in that: The elastic component is a leaf spring, and the leaf spring is connected to the dynamic spring component and the push rod component.

3. The relay according to claim 2, characterized in that: The relay further comprises a pair of static contact lead-out terminals, and the two ends of the movable reed along the first direction are used to contact or separate from the pair of static contact lead-out terminals respectively; the first direction is the arrangement direction of the pair of static contact lead-out terminals; The leaf spring comprises a base plate and a spring arm, the base plate is connected to the push rod assembly, and at least one spring arm is respectively provided at both ends of the base plate along the first direction; one end of each spring arm is connected to the base plate, and the other end is connected to the movable spring leaf; Wherein, before the push rod assembly moves to the transition position, the spring arm does not contact the push rod assembly; when the push rod assembly moves to the transition position and during the process of moving from the transition position to the over-travel end position, the spring arm abuts against the push rod assembly.

4. The relay according to claim 3, characterized in that: A protrusion is also provided between one end of each spring arm and the base sheet, the protrusion direction of which is away from the movable spring sheet; Wherein, before the push rod assembly moves to the transition position, the protrusion does not contact the push rod assembly; when the push rod assembly moves to the transition position and during the process of moving from the transition position to the over-travel end position, the protrusion abuts against the push rod assembly.

5. The relay according to claim 4, characterized in that: The spring arms are bent from the protruding portion toward the direction approaching the movable spring sheet, and the spring arms located at both sides of the base sheet along the first direction extend in directions away from each other.

6. The relay according to claim 4, characterized in that: The other end of the spring arm is provided with an abutment portion, and the abutment portion abuts against the movable spring piece; There is a first distance between the abutting portions located on both sides of the substrate along the first direction; There is a second interval between the protrusions located on both sides of the substrate along the first direction, and the first interval is greater than the second interval.

7. The relay according to claim 4, characterized in that: The protrusion is formed by bending the leaf spring.

8. The relay according to claim 3, characterized in that: The relay comprises a plurality of the movable spring assemblies, each of the movable spring assemblies comprises a movable spring sheet, and the plurality of movable spring sheets are arranged side by side along a third direction; wherein the movement direction of the movable spring sheet is defined as a second direction, and the first direction, the second direction and the third direction are perpendicular to each other; A plurality of the spring arms are respectively disposed on both sides of the substrate along the first direction, and the number of the plurality of the spring arms on one side of the substrate corresponds to the number of the plurality of the movable spring sheets.

9. The relay according to claim 1, characterized in that: The relay further comprises: A first magnetic conductor is arranged on a side of the movable spring sheet facing away from the elastic component.

10. The relay according to claim 9, characterized in that: The movable spring assembly further includes a second magnetic conductor, which is fixedly connected to a side of the movable spring piece facing the elastic assembly, and the second magnetic conductor is used to form a magnetic circuit with the first magnetic conductor.

11. The relay according to claim 1, characterized in that: The push rod assembly comprises: Rod; The base is connected to one axial end of the rod; the base is provided with a boss facing the movable spring; and the elastic component is connected to a side surface of the boss facing away from the base.

12. The relay according to claim 11, characterized in that: The relay further comprises a pair of static contact lead-out terminals, and the two ends of the movable reed along the first direction are used to contact or separate from the pair of static contact lead-out terminals respectively; the first direction is the arrangement direction of the pair of static contact lead-out terminals; The elastic component is a leaf spring; the leaf spring comprises a base and a spring arm, and at least one spring arm is respectively provided at both ends of the base along the first direction; the base is provided with a limiting hole, a protruding column is provided on a side surface of the boss facing away from the base, the protruding column is inserted into the limiting hole, and a side surface of the base facing away from the movable spring sheet abuts against a side surface of the boss facing the movable spring sheet; One end of the spring arm away from the substrate is connected to the movable spring.

13. The relay according to claim 12, characterized in that: A protrusion is also provided between one end of each spring arm and the base sheet, the protrusion direction of which is away from the movable spring sheet; The apex of the protrusion is lower than a surface of the boss facing the movable spring.

14. The relay according to claim 12, characterized in that: A convex ring is provided on a surface of one side of the base plate facing the movable spring sheet, the convex ring surrounds the limiting hole, and the inner ring surface of the convex ring is flush with the hole wall of the limiting hole.

15. The relay according to claim 14, characterized in that: The convex ring is formed by folding the edge of the limiting hole of the substrate toward the direction close to the movable spring sheet.

16. The relay according to claim 14, characterized in that The convex ring is provided with a top surface facing away from the substrate, and a chamfer is provided at a connection between the top surface and the inner ring surface.

Images