Relay

Abstract

The utility model provides a relay which comprises a support, a contact part, a push-pull rod and a magnetic circuit part. The contact part comprises at least one pair of static conductive pieces, at least one movable contact bridge and at least one elastic piece; the side surface of the static conductive member in the first direction is provided with a static contact. The two ends of the elastic piece in the second direction are a contact end and an assembly end respectively, the second direction is perpendicular to the first direction, the elastic piece is arranged on the support through the assembly end, and the movable contact bridge is arranged on the side, facing the static conductive piece, of the contact end; the push-pull rod extends along a first direction, one end of the push-pull rod is connected to the magnetic circuit part, and the other end is in push-pull fit with the contact end; the magnetic circuit part can drive the push-pull rod to push and pull the elastic piece or the movable contact bridge to move in the first direction, and the elastic piece deforms when the push-pull rod is pushed and pulled and drives the movable contact bridge to reset when the contact part is converted from the on state to the off state.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a relay. BACKGROUND

[0002] The relay is an electronic control device with a control system (also known as an input circuit) and a controlled system (also known as an output circuit), which is usually applied in automatic control circuit. It 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 circuit conversion in the circuit. With the continuous expansion of the application range of the relay, the relay is also developing in the direction of high load and miniaturization. The demand for high load requires the relay to meet higher voltage requirements, and specifically requires the relay to have a larger contact gap.

[0003] One of the existing relays includes a moving spring sheet, a moving spring lead-out sheet, and a static spring lead-out sheet. The moving spring sheet is provided with a moving contact. One end of the moving spring sheet is fixedly connected with the moving spring lead-out sheet, and the moving spring sheet and the moving spring lead-out sheet are arranged at an included angle. The other end of the moving spring sheet is drivingly connected with a magnetic circuit part. However, the rotating angle of the moving spring sheet of this design is small. In order to achieve a large contact gap, the moving spring sheet needs to form a large included angle with the moving spring lead-out sheet. At this time, a horn mouth is prone to occur in the contact closed state, which cannot guarantee the central arc, affects the service life reliability of the relay, and at the same time, due to the need to consider the current carrying capacity and elasticity of the moving spring sheet, the moving spring sheet needs to use a material with high cost. CONTENT OF THE UTILITY MODEL

[0004] One of the main purposes of the present disclosure is to overcome at least one of the defects of the prior art, and to provide a relay with better service life reliability and lower material cost.

[0005] In order to achieve the above-mentioned purpose, the present disclosure adopts the following technical solutions:

[0006] According to one aspect of the present disclosure, a relay is provided, wherein: the relay comprises a support, a contact part, a push-pull rod and a magnetic circuit part; the contact part comprises at least one pair of static conductive pieces, at least one dynamic contact bridge and at least one elastic piece; the static conductive pieces are provided with static contact points on their side faces in a first direction; the elastic piece is provided with a contact end and an assembly end at its two ends in a second direction, the second direction being perpendicular to the first direction, the assembly end of the elastic piece is assembled to the support, and the dynamic contact bridge is arranged on the side of the contact end facing the static conductive pieces; the push-pull rod extends in the first direction, one end of the push-pull rod is connected to the magnetic circuit part, and the other end of the push-pull rod is in push-pull cooperation with the contact end; wherein the magnetic circuit part can drive the push-pull rod to move in the first direction, so that the push-pull rod pushes or pulls the elastic piece or the dynamic contact bridge to move in the first direction, the elastic piece deforms when the push-pull rod pushes or pulls, and drives the dynamic contact bridge to reset when the contact part changes from a conducting state to an open state.

[0007] According to one of the embodiments of the present disclosure, the two static conductive pieces of the same pair are arranged at intervals in a third direction, the third direction being perpendicular to the first direction and perpendicular to the second direction.

[0008] According to one of the embodiments of the present disclosure, the contact part further comprises a reed, one end of the reed is connected to the elastic piece, and the other end of the reed is bent and extended away from the static conductive pieces; wherein the push-pull rod is provided with two push-pull blocks at intervals in the first direction, the two push-pull blocks are respectively located on the side of the elastic piece away from the static contact points and on the side of the dynamic contact bridge facing the static conductive pieces, and one of the push-pull blocks is used to push the other end of the reed away from the static conductive pieces.

[0009] According to one of the embodiments of the present disclosure, the contact end of the elastic piece is provided with a first through hole, the dynamic contact bridge is provided with a second through hole, the first through hole and the second through hole are in communication to form a through channel, and the push-pull rod passes through the through channel.

[0010] According to one of the embodiments of the present disclosure, one end of the reed is integrally connected to the hole wall of the first through hole.

[0011] According to one of the embodiments of the present disclosure, the side of the dynamic contact bridge facing the static conductive pieces is provided with two dynamic contact points, the two dynamic contact points are arranged at intervals in the third direction, and the two dynamic contact points are respectively used to contact and cooperate with the static contact points of the two static conductive pieces of the same pair; wherein the second through hole is located between the two dynamic contact points.

[0012] According to one of the embodiments of the present disclosure, two limiting protrusions are arranged on the side of the reed away from the static conductive part, and the two limiting protrusions are arranged along the third direction to limit the two sides of the push-pull block in the third direction when the push-pull block pushes against the reed.

[0013] According to one of the embodiments of the present disclosure, the support includes a base plate, the base plate is provided with a first slot, and the elastic member is connected with a first insertion piece at the assembly end, and the first insertion piece is inserted into the first slot.

[0014] According to one of the embodiments of the present disclosure, the material of the elastic member is stainless steel.

[0015] According to one of the embodiments of the present disclosure, the magnetic circuit part includes an armature assembly, the armature assembly is arranged on one side of the contact part in the first direction, and is rotatably arranged on the support via a rotating shaft extending along the third direction, the third direction is perpendicular to the first direction and perpendicular to the second direction, and the armature assembly has a driving end at one end in the second direction; one end of the push-pull rod is connected to the driving end, and the other end is in push-pull cooperation with the contact end of the elastic member; wherein the magnetic circuit part can drive the armature assembly to rotate so that the armature assembly drives the push-pull rod to move along the first direction.

[0016] According to one of the embodiments of the present disclosure, the support includes a base plate, the relay further includes an armature cover plate, and the base plate and the armature cover plate are both perpendicular to the third direction; the base plate is provided with two supports extending along the third direction, and the two supports are arranged along the second direction, the two supports and the base plate jointly form an accommodating space for accommodating a coil assembly and a yoke assembly of the magnetic circuit part; the armature cover plate is connected to the side of the support away from the base plate, the base plate and the armature cover plate are respectively provided with shaft holes corresponding in position, and the armature assembly is respectively provided with coaxial rotating shafts on the two sides in the third direction, and the two rotating shafts are rotatably arranged in the two shaft holes.

[0017] According to one of the embodiments of the present disclosure, the contact part comprises two pairs of static conductive pieces, two dynamic contact bridges and two elastic pieces; the two pairs of static conductive pieces are arranged in the second direction; one dynamic contact bridge is arranged on one side of one pair of static conductive pieces in the first direction, and the other dynamic contact bridge is arranged on the other side of the other pair of static conductive pieces in the first direction; the relay comprises two push-pull rods corresponding to the two dynamic contact bridges respectively; wherein the magnetic circuit part can drive the two push-pull rods to move synchronously and reversely in the first direction, so that the two dynamic contact bridges move synchronously and reversely in the first direction, so that the two dynamic contact bridges are turned on or turned off at the same time.

[0018] According to one of the embodiments of the present disclosure, the two static conductive pieces in the same pair are arranged in the third direction, which is perpendicular to the first direction and perpendicular to the second direction; the two static conductive pieces belonging to different pairs and located on the same side in the third direction are connected to form a static contact bridge.

[0019] According to one of the embodiments of the present disclosure, the static contact bridge has a first end portion and a second end portion spaced apart in the second direction; one static contact point is arranged on the side of the first end portion facing the magnetic circuit part, and the other static contact point is arranged on the side of the second end portion facing away from the magnetic circuit part; wherein in the first direction, the second end portion is closer to the magnetic circuit part than the first end portion.

[0020] According to one of the embodiments of the present disclosure, the support comprises a base plate provided with an assembly table extending in the third direction, and the assembly table is provided with a second slot; the static contact bridge is provided with a second insertion piece in the middle portion in the second direction, and the second insertion piece is inserted into the second slot.

[0021] According to one of the embodiments of the present disclosure, in the on state of the relay, the current flows from one static conductive piece to the dynamic contact bridge connected thereto, through the dynamic contact bridge to the static contact point of the static contact bridge, from one end portion of the static contact bridge to the other end portion in the second direction, through the static contact point of the static contact bridge to the other dynamic contact bridge connected thereto, and from the other dynamic contact bridge to the other static conductive piece connected thereto.

[0022] According to one of the embodiments of the present disclosure, the magnetic circuit part comprises an armature assembly; the armature assembly is located on one side of the contact part in the first direction and is rotatably arranged on the support via a rotating shaft extending in parallel to a third direction, the third direction being perpendicular to the first direction and perpendicular to the second direction, the armature assembly having a driving end at each end in the second direction; one end of each of the two push-pull rods is connected to the two driving ends respectively, and the other end of each of the two push-pull rods is in push-pull cooperation with the contact end of the two elastic members respectively; wherein the magnetic circuit part can drive the armature assembly to rotate so that the armature assembly drives the two push-pull rods to move synchronously and reversely along the first direction.

[0023] According to one of the embodiments of the present disclosure, the elastic member is provided with a third through hole at the assembly end; wherein, along the first direction, the elastic member closer to the armature assembly is a first elastic member, the other elastic member is a second elastic member, the push-pull rod in push-pull cooperation with the first elastic member is a first push-pull rod, and the other push-pull rod is a second push-pull rod, the second push-pull rod passing through the third through hole of the first elastic member.

[0024] According to one of the embodiments of the present disclosure, the third through hole is trapezoidal or triangular, and the large end of the trapezoid or triangle faces the contact end.

[0025] According to one of the embodiments of the present disclosure, the two elastic members are two components that are completely identical in structure and symmetrically arranged in space, and the symmetry axis is parallel to a third direction, the third direction being perpendicular to the first direction and perpendicular to the second direction.

[0026] According to one of the embodiments of the present disclosure, the two ends of the moving contact bridge in a third direction correspond to the static contact points of a pair of static conductive members located on the same side in the second direction respectively, the third direction being perpendicular to the first direction and perpendicular to the second direction.

[0027] From the above technical solutions, the relay proposed by the present disclosure has the following advantages and positive effects:

[0028] The contact part of the relay provided by the present disclosure comprises at least one pair of static conductive pieces, at least one dynamic contact bridge, and at least one elastic piece. The static conductive piece is provided with a static contact point on the side in the first direction. The elastic piece is provided with a contact end and an assembly end at both ends in the second direction, the second direction being perpendicular to the first direction. The elastic piece is assembled to the support with the assembly end. The dynamic contact bridge is arranged on the side of the contact end facing the static conductive piece. The push-pull rod extends in the first direction, one end of which is connected to the magnetic circuit part, and the other end thereof is in push-pull cooperation with the contact end. The magnetic circuit part can drive the push-pull rod to push and pull the elastic piece or the dynamic contact bridge to move in the first direction. The elastic piece deforms when the push-pull rod pushes and pulls, and drives the dynamic contact bridge to reset when the contact part changes from the on state to the off state. Through the above structural design, the present disclosure can realize the reset-off of the dynamic contact bridge after the closure by using the elastic piece. Since the dynamic contact bridge and the elastic piece are combined, the dynamic contact bridge serves as the current-carrying piece, that is, the elastic piece does not provide the current-carrying function. Accordingly, the contact gap can be increased by adjusting the position of the elastic piece, and the trumpet mouth in the off state of the contact can be avoided, the central arc can be ensured, and the service life reliability of the relay can be improved. In addition, since the elastic piece does not carry current and only needs to provide elastic force, the elastic piece can be made of low-cost material without considering the electric conductivity.

[0029] In an embodiment of the present disclosure, the contact part comprises a reed, one end of the reed being connected to the elastic piece, and the other end of the reed being bent and extended away from the static conductive piece. The push-pull rod is provided with two push-pull blocks spaced apart in the first direction, the two push-pull blocks being located on the side of the elastic piece away from the static contact point and the side of the dynamic contact bridge facing the static conductive piece respectively, and one of the push-pull blocks being used to push the other end of the reed away from the static conductive piece. Through the above structural design, the present disclosure can utilize the deformation of the flexible closure of the reed to generate pressure, and the pressure can be adjusted by the slotting depth and width size of the reed.

[0030] In an embodiment of the present disclosure, the contact end of the elastic piece is provided with a first through hole, the dynamic contact bridge is provided with a second through hole, and the first through hole and the second through hole are communicated to form a through channel. The push-pull rod passes through the through channel, and the push-pull rod is provided with two push-pull blocks spaced apart in the first direction, the two push-pull blocks being located on the side of the elastic piece away from the second static contact point and the side of the dynamic contact bridge facing the static contact bridge respectively, and the push-pull rod being capable of pushing and pulling the elastic piece or the dynamic contact bridge via the push-pull blocks to realize the push and pull of the contact end. Through the above structural design, the present disclosure utilizes the through holes respectively provided in the corresponding positions of the elastic piece and the dynamic contact bridge to form the through channel, thereby realizing the arrangement of the push-pull rod, avoiding the arrangement of the push-pull rod on the outside of the elastic piece and the dynamic contact bridge, and being beneficial to reducing the space occupation. BRIEF DESCRIPTION OF DRAWINGS

[0031] The various objectives, features, and advantages of this disclosure will become more apparent from the following detailed description of preferred embodiments of the disclosure, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the present disclosure and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0032] Figure 1 and Figure 2 These are three-dimensional structural schematic diagrams of a portion of the relay structure shown in an exemplary embodiment from two different perspectives.

[0033] Figure 3 yes Figure 1 Side view;

[0034] Figure 4 and Figure 5 They are in two different states along Figure 3 A sectional view of line AA in the diagram;

[0035] Figure 6 It is along Figure 4 A schematic diagram of the cross-section made by the straight line BB in the diagram;

[0036] Figure 7 yes Figure 1 A three-dimensional exploded view;

[0037] Figure 8 and Figure 9 These are magnified 3D schematic diagrams of the relay contact parts in two different states;

[0038] Figure 10 and Figure 11 They are Figure 8 The diagram shows a partial structure in three dimensions from two different perspectives.

[0039] Figure 12 yes Figure 11 A plan view;

[0040] Figure 13 and Figure 14 These are magnified three-dimensional schematic diagrams of the moving touch bridge from two different perspectives;

[0041] Figure 15 This is a three-dimensional enlarged schematic diagram of a static contact bridge;

[0042] Figure 16 This is a three-dimensional enlarged schematic diagram of the magnetic circuit part of the relay.

[0043] Figure 17 This is a three-dimensional structural diagram of the support;

[0044] Figure 18is a perspective structural schematic view of a contact portion of a relay according to another exemplary embodiment;

[0045] Figure 19 is a perspective structural schematic view of a contact portion of a relay according to another exemplary embodiment.

[0046] Reference signs are explained as follows:

[0047] 100. support; 2311. first through-hole;

[0048] 110. base plate; 2312. assembly end portion;

[0049] 111. bracket; 23121. third through-hole;

[0050] 112. shaft hole; 2313. spring;

[0051] 113. first insertion slot; 23131. limiting protrusion;

[0052] 114. assembly table; 2314. first insertion piece;

[0053] 115. second insertion slot; 232. movable contact bridge;

[0054] 120. armature cover plate; 2321. second through-hole;

[0055] 121. shaft hole; 2322. movable contact point;

[0056] 210. stationary contact bridge; 310. armature assembly;

[0057] 211. second stationary contact point; 311. rotating shaft;

[0058] 212. first end portion; 320. push-pull rod;

[0059] 213. second end portion; 321. push-pull block;

[0060] 214. second insertion piece; 330. coil assembly;

[0061] 220. stationary conductive member; 340. yoke assembly;

[0062] 221. first stationary contact point; X. first direction;

[0063] 231. elastic member; Y. second direction;

[0064] 2311. contact end portion; Z. third direction. DETAILED DESCRIPTION

[0065] Typical embodiments embodying the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can be embodied in various ways without departing from the spirit or central characteristics thereof, and that the description and drawings are to be understood only as illustrative in nature and not as restrictive.

[0066] In the following description of various example embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example structures, systems, and steps in which aspects of the present disclosure can be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps can be utilized and that structural and functional modifications can be made without departing from the scope of the present disclosure. Also, while the terms "over," "between," "inside," "on," and the like can be used in the following description to describe relative positioning of various example features and elements, these terms are used in this specification to describe relative positioning in accordance with the examples shown in the drawings as opposed to absolute positioning. Nothing in this specification should be understood as requiring a specific three-dimensional orientation of structures as falling within the scope of the present disclosure.

[0067] Referring to Figure 1 and Figure 2 , respectively, representatively illustrate perspective structural schematic diagrams of a portion of a relay according to the present disclosure from two different viewing angles. In this example embodiment, the relay according to the present disclosure is described by way of example as being applied to a charging and energy storage scenario. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes can be made to the following detailed description of the specific embodiments in order to apply the relevant design of the present disclosure to other types of relays, and such changes are still within the scope of the principles of the relay according to the present disclosure.

[0068] As shown in Figure 1 and Figure 2 , in an embodiment of the present disclosure, the relay according to the present disclosure includes a support 100, a contact portion and a magnetic circuit portion, both of which are disposed in the support 100, and a push-pull rod 320. Referring to Figures 3 to 17 , Figure 3 , a side view of Figure 1 is representatively illustrated; Figure 4 and Figure 5 representatively illustrate cross-sectional views along a straight line A-A in Figure 3 in two different states, respectively; Figure 6 representatively illustrates a cross-sectional schematic diagram along a straight line B-B in Figure 4 ; Figure 7 representatively illustrates an exploded perspective schematic diagram of Figure 1 ; Figure 8 and Figure 9respectively representatively show the perspective enlarged schematic diagram of the contact portion in two different states; Figure 10 and Figure 11 respectively representatively show Figure 8 the perspective structural schematic diagram of the partial structure in two different views, wherein the combination structure of the two moving contact bridges 232 and the two push-pull rods 320 is specifically shown; Figure 12 respectively representatively show Figure 11 the planar schematic diagram of the magnetic circuit part; Figure 13 and Figure 14 respectively representatively show the perspective enlarged schematic diagram of the moving contact bridge 232 in two different views;

[0069] Figure 15 respectively representatively show the perspective enlarged schematic diagram of the static contact bridge 210; Figure 16 respectively representatively show the perspective enlarged schematic diagram of the magnetic circuit part; Figure 17 respectively representatively show the perspective structural schematic diagram of the support 100. Among them, for the two different states in the above figures, they are the contact opening state and the contact closing state of the relay, for example Figure 4 and Figure 8 are the contact opening state, Figure 5 and Figure 9 are the contact closing state. The structure, connection mode and functional relationship of each main component of the relay proposed in the present disclosure will be described in detail below in combination with the above figures.

[0070] as Figures 1 to 9 , Figure 16As shown, in an embodiment of the present disclosure, the contact part includes the static contact bridge 210, two static conductive pieces 220, two dynamic contact bridges 232, and two elastic pieces 231. The contact part can be understood as including two pairs of static conductive pieces 220 (and the dynamic contact bridge 232 and the elastic piece 231 can each be two), and two static conductive pieces 220 located on the same side in the third direction Z and belonging to different pairs respectively can be connected into one body to form the static contact bridge 210, the static contact bridge 210 is provided with two second static contact points 211, the second static contact points 211 can be, for example, integrally formed with the static contact bridge 210, the two second static contact points 211 are respectively located on both sides of the static contact bridge 210 in the first direction X, and the two second static contact points 211 are arranged at intervals along the second direction Y perpendicular to the first direction X. In this embodiment, an example is taken that the static contact bridge 210 includes only one second static contact point 211 on each side, and in some embodiments, the second static contact point 211 on each side of the static contact bridge 210 can further include at least two sub-contact points. The two static conductive pieces 220 are arranged at intervals along the third direction Z, which is perpendicular to the first direction X and perpendicular to the second direction Y, and in the second direction Y, the two static conductive pieces 220 are arranged correspondingly to the two second static contact points 211. The static conductive piece 220 can also be provided with a first static contact point 221 on one side in the first direction X, the first static contact point 221 can be, for example, integrally formed with the static conductive piece 220, and the first static contact point 221 of the static conductive piece 220 and the corresponding second static contact point 211 (for example, located on the same side in the second direction Y) are located on the same side in the first direction, that is, they jointly face one dynamic contact bridge 232. One dynamic contact bridge 232 is arranged on one side of the first end portion 212 of the static contact bridge 210 and one static conductive piece 220 (i.e., one pair of static conductive pieces) in the first direction X, and the other dynamic contact bridge 232 is arranged on the other side of the second end portion 212 of the static contact bridge 210 and the other static conductive piece 220 (i.e., the other pair of static conductive pieces) in the first direction X. The elastic piece 231 has two end portions in the second direction Y, which are the contact end portion 2311 and the assembly end portion 2312, respectively, and the elastic piece 231 is assembled to the support 100 with the assembly end portion 2312, and the dynamic contact bridge 232 is arranged on the side of the contact end portion 2311 facing the static contact bridge 210 and the static conductive piece 220. On this basis, the elastic piece 231 deforms when the dynamic contact bridge 232 is driven to move in the magnetic circuit part, and the elastic piece 231 accumulates elastic potential energy due to its own deformation in this process, and when the contact part changes from the conduction state to the open state, the elastic piece 231 releases the elastic potential energy to drive the dynamic contact bridge 232 to reset. In this embodiment, the push-pull rod 320 can be two, the push-pull rod 320 extends along the first direction X, and one end of each of the two push-pull rods 320 is connected to the two driving end portions, respectively, and the other end of each of the two push-pull rods 320 is in push-pull cooperation with the contact end portion 2311 of the two elastic pieces 231, respectively.Accordingly, the magnetic circuit portion can drive the armature assembly 310 to rotate, so that the armature assembly 310 drives the two push-pull rods 320 to synchronously move in the first direction X in the reverse direction. It should be noted that in some embodiments, when the relay of the present disclosure adopts the two groups of bridge contacts described above, the two groups of bridge contacts can also adopt a design in which one group is opened while the other group is closed, for example, the magnetic circuit portion can respectively drive the two push-pull rods 320 to synchronously move in the first direction X in the same direction, and the present embodiment is not limited thereto. The magnetic circuit portion can drive the push-pull rod 320 to move in the first direction X, so that the push-pull rod 320 pushes and pulls the elastic member 231 or the movable contact bridge 232 to move the movable contact bridge 232 in the first direction X. The elastic member 231 is deformed when the push-pull rod 320 is pushed and pulled, so as to realize contact closing, and drives the movable contact bridge 232 to reset when the pushing and pulling of the push-pull rod 320 is weakened or disappears, so as to realize contact opening.

[0071] Through the above structural design, the present disclosure can realize the reset opening of the movable contact bridge 232 after closing by using the elastic member 231. Moreover, the combination design of the movable contact bridge 232 and the elastic member 231 is adopted, in which only the movable contact bridge 232 is used as a current-carrying member, that is, the elastic member 231 does not provide current-carrying, so as to realize the increase of the contact gap by adjusting the position of the elastic member 231 while avoiding the occurrence of the horn mouth (for example, the conversion ratio of the stroke of the armature assembly 310 to the contact gap is 1:1) in the contact opening state, ensuring the central arc, and improving the service life reliability of the relay. Moreover, since the present disclosure can realize the increase of the contact gap compared with the prior art, that is, the action stroke of the movable contact bridge 232 is shorter, so that the present disclosure can reduce the deformation amplitude of the elastic member 231 when the elastic member 231 is applied, reduce metal fatigue, and be beneficial to prolong the service life of the above-mentioned elastic member. In addition, since the elastic member 231 does not carry current but only needs to provide elastic force, the elastic member 231 can adopt a low-cost material such as stainless steel, without considering the current-carrying capacity, and the elastic member 231 only needs to ensure the force value, which can further reduce the occupied space of the elastic member 231. In addition, since the elastic member 231 does not carry current, the present disclosure does not need to make the elastic member 231 larger and thicker in order to match the current, that is, the counterforce of the elastic member 231 can be set smaller, and the magnetic circuit portion does not need to match a larger driving force, thereby reducing the volume of the magnetic circuit portion. On the other hand, since the elastic member 231 does not carry current, only the cross sections of the movable contact bridge 232, the static contact bridge 210 and the static lead-out end 220 need to be adjusted for different load currents, and the elastic member 231 and the magnetic circuit portion do not need to be adjusted synchronously, so as to enhance the versatility of the relay (for the subsequent series of load current improvement, it is more advantageous to develop in parallel without changing the magnetic circuit portion). In addition, the present disclosure utilizes the combination design of the elastic member 231 and the movable contact bridge 232, which is equivalent to setting a rigid gasket for the contact end 2311 of the elastic member 231, so as to increase the stiffness of the contact head, which is beneficial to realize the purpose of fast breaking of the contact.

[0072] Furthermore, when the contact part comprises the static contact bridge 210, the two static conductive pieces 220 and the two dynamic contact bridges 232, the present disclosure can provide a contact part with a bridge structure, by which the contact gap is extended while the arc voltage is increased, by which the arc static volt-ampere characteristic is improved, which is beneficial to fast arc extinction and reduces contact ablation. Moreover, the present disclosure can reduce the gap of a single group of contacts while extending the contact gap, thereby reducing the occupied space of the contact part and shortening the movement stroke of the dynamic contact bridge 232, reducing the driving force required to be provided by the magnetic circuit part, thereby reducing the volume of the magnetic circuit part, so that the relay meets the design requirements of miniaturization. On this basis, the present disclosure sets the two dynamic contact bridges 232 on the two sides of the static contact bridge 210 and the two static conductive pieces 220, respectively, thereby realizing effective isolation of the arcs generated by the two dynamic contact bridges 232 on the two sides, and avoiding mutual influence when the bridge contact generates an arc.

[0073] Specifically, in the on state of the relay, the current flows from one static conductive piece 220 to the dynamic contact bridge 232 in contact therewith, flows to the second static contact 211 in contact therewith via the dynamic contact bridge 232, flows from one end of the static contact bridge 210 in the second direction Y to the other end, flows to the other dynamic contact bridge 232 in contact therewith via the second static contact 211 of the other end, and flows to the other static conductive piece 220 in contact therewith via the other dynamic contact bridge 232. Through the above structural design, the present disclosure can realize that the contact gap of the relay is four times that of a single group of contacts. For example, if the single contact gap is 2 mm, the contact gap of the relay can satisfy 8 mm, and the specific value of the above gap can be adjusted by stroke control. At the same time, when the contacts are separated, the four contacts become four breaks, and arcs are generated at the four breaks, respectively. Therefore, the present disclosure increases the number of breaks to realize simultaneous breaking of the four breaks to form four arcs. Compared with the existing scheme with a double-break structure, the present disclosure can double the number of arc segments. Among the four arcs, each arc has a cathode and anode voltage drop, i.e., a total of eight side voltage drops, so that the present disclosure can double the side voltage drop. In addition, under the condition that the contact opening distance is constant, the increase in the number of arc segments doubles the sum of the lengths of the arcs, i.e., the total length of the arc column region increases, the arc column region voltage drop doubles, and the arc voltage increases significantly, thereby improving the arc static volt-ampere characteristic, which is beneficial to fast arc extinction and reduces contact ablation, and improves the life and pressure and current resistance of the contactor.

[0074] It should be noted that the present disclosure can be applied to a relay with a single group of contacts, and the above-mentioned advantages can be achieved. Figures 1 to 17In the illustrated embodiment, the contact portion includes the static contact bridge 210, the two static conductive members 220, and the two dynamic contact bridges 232. It should be understood that in other exemplary embodiments consistent with the principles of the present disclosure, based on the basic concept of the "combination design of the elastic member 231 and the dynamic contact bridge 321" adopted in the present disclosure, the contact portion can also have other structural forms, for example, the contact portion is not limited to necessarily including the static contact bridge 210, or is not limited to including two dynamic contact bridges 232, and the like, which will be described in detail in the following Figure 18 and Figure 19 exemplary embodiments.

[0075] In an embodiment of the present disclosure, the dynamic contact bridge 232 can be fixed to the contact end 2311 of the elastic member 231 in a riveting manner. In some embodiments, the dynamic contact bridge 232 and the elastic member 231 can also be assembled and connected in other ways, and are not limited to the present embodiment.

[0076] As shown in Figures 7 to 14 , in an embodiment of the present disclosure, the contact portion can also include a spring piece 2313, one end of the spring piece 2313 being connected to the elastic member 231, and the other end of the spring piece 2313 being bent and extended away from the static conductive member 220 (or the static contact bridge 210). On this basis, the push-pull rod 320 can be provided with two push-pull blocks 321 spaced apart along the first direction X, the two push-pull blocks 321 being respectively located on the side of the elastic member 231 away from the static contact point and the side of the dynamic contact bridge 232 facing the static conductive member 220, and one of the push-pull blocks 321 being used to push against the side of the other end of the spring piece 2313 away from the static conductive member 220. Through the above structural design, the present disclosure can utilize the deformation of the flexible closed spring piece 2313 to generate pressure, and the pressure can be adjusted by adjusting the slot depth and width size of the spring piece 2313, and the elastic member 231 provides the contact pressure in the closed state and the reset reaction force in the open state through the deformation of the spring piece 2313, matches the suction reaction force in the open state and the closed state, and does not need to design additional parts to provide the reaction force.

[0077] As shown in Figure 7 and Figure 8As shown, based on the design that the contact portion comprises the spring piece 2313, in an embodiment of the present disclosure, the contact end 2311 of the elastic piece 231 can be provided with a first through hole 23111, the movable contact bridge 232 can be provided with a second through hole 2321, the first through hole 23111 and the second through hole 2321 are in communication to form a through channel. According to this, the push-pull rod 320 can pass through the through channel, and the push-pull rod 320 is provided with two push-pull blocks 321 spaced apart along the first direction X, the two push-pull blocks 321 are respectively located on the side of the elastic piece 231 away from the second stationary contact 211 and the side of the movable contact bridge 232 facing the stationary contact bridge 210, and the push-pull rod 320 can push the elastic piece 231 or the movable contact bridge 232 via the push-pull blocks 321 to realize the pushing and pulling of the contact end 2311. Through the above structural design, the present disclosure utilizes the through holes respectively formed in the corresponding positions of the elastic piece 231 and the movable contact bridge 232 to form a through channel, according to which the push-pull rod 320 is arranged, avoiding the push-pull rod 320 being arranged on the outside (for example, on the side in the second direction Y or the third direction Z) of the elastic piece 231 and the movable contact bridge 232, which is beneficial to reducing the space occupation. In some embodiments, the push-pull rod 320 can also be arranged on the outside of the elastic piece 231 and the movable contact bridge 232, then the elastic piece 231 and the movable contact bridge 232 do not need to be provided with the above-mentioned through holes, at this time, the push-pull rod 320 can still be provided with the above-mentioned push-pull blocks 321, and the structure and position of the push-pull blocks 321 can be adjusted to realize the specific pushing and pulling action, which is not limited to the embodiment.

[0078] As shown in FIG. 13, the push-pull rod 320 is arranged on the outside of the elastic piece 231 and the movable contact bridge 232, and the push-pull rod 320 is provided with two push-pull blocks 321 spaced apart along the first direction X, the two push-pull blocks 321 are respectively located on the side of the elastic piece 231 away from the second stationary contact 211 and the side of the movable contact bridge 232 facing the stationary contact bridge 210, and the push-pull rod 320 can push the elastic piece 231 or the movable contact bridge 232 via the push-pull blocks 321 to realize the pushing and pulling of the contact end 2311. Figures 7 to 14 As shown, based on the design that the elastic piece 231 is provided with the first through hole 23111, in an embodiment of the present disclosure, one end of the spring piece 2313 can be integrally connected to the hole wall of the first through hole 23111, and the other end of the spring piece 2313 is bent and extended away from the stationary contact bridge 210. According to this, one of the push-pull blocks 321 of the push-pull rod 320 is used to push the side of the other end of the spring piece 2313 away from the stationary contact bridge 210. In some embodiments, the spring piece 2313 can also be integrally connected to other positions of the elastic piece 231, or the spring piece 2313 and the elastic piece 231 are not limited to an integral structure, for example, the spring piece 2313 and the elastic piece 231 can be two connected components, which are not limited to the embodiment.

[0079] As shown in FIG. 13, the push-pull rod 320 is arranged on the outside of the elastic piece 231 and the movable contact bridge 232, and the push-pull rod 320 is provided with two push-pull blocks 321 spaced apart along the first direction X, the two push-pull blocks 321 are respectively located on the side of the elastic piece 231 away from the second stationary contact 211 and the side of the movable contact bridge 232 facing the stationary contact bridge 210, and the push-pull rod 320 can push the elastic piece 231 or the movable contact bridge 232 via the push-pull blocks 321 to realize the pushing and pulling of the contact end 2311. Figure 8 , Figure 12 and Figure 13As shown, based on the design that the elastic member 231 comprises the spring sheet 2313, in an embodiment of the present disclosure, the side of the spring sheet 2313 away from the static contact bridge 210 can be provided with two limiting protrusions 23131, which are arranged in the third direction Z, and the two limiting protrusions 23131 can limit the two sides of the push-pull block 321 in the third direction Z when the push-pull block 321 pushes against the spring sheet 2313. Through the above design, the present disclosure can further improve the stability and accuracy of the push-pull action of the push-pull rod 320.

[0080] As shown in the figure, Figures 7 to 14 As shown, based on the design that the dynamic contact bridge 232 is provided with the second through hole 2321, in an embodiment of the present disclosure, the side of the dynamic contact bridge 232 facing the static contact bridge 210 is provided with two dynamic contact points 2322, which are arranged in the third direction Z, that is, one of the two dynamic contact points 2322 is in contact with one of the second static contact points 211 of the static contact bridge 210, and the other dynamic contact point 2322 is in contact with one of the static conductive members 220. On this basis, the second through hole 2321 can be located between the two dynamic contact points 2322. Through the above structural design, the present disclosure can make the pressure more uniform when the push-pull rod 320 pushes and pulls the dynamic contact bridge 232, and further improve the stability of the push-pull action. In some embodiments, the second through hole 2321 can also be arranged at other positions of the dynamic contact bridge 232, for example, it can be located on one side of the two dynamic contact points 2322 in the second direction Y, or it can be located on the side of one of the dynamic contact points 2322 away from the other dynamic contact point 2322 in the third direction Z, which are not limited by the above embodiments.

[0081] As shown in the figure, Figure 7 , Figure 11 , Figure 13 and Figure 14As shown in

[0082] As shown in Figure 7 、 Figure 11 、 Figure 13 and Figure 14 As shown in

[0083] As shown in Figures 1 to 9 、 Figure 16 As shown in

[0084] As shown in Figures 10 to 12As shown, in an embodiment of the present disclosure, the two elastic members 231 can be two components that are structurally identical and arranged in axial symmetry in space, and the symmetry axis of the two elastic members 231 extends parallel to the third direction Z. In particular, when the elastic member 231 is provided with the third through hole 23121, the third through hole 23121 of one of the elastic members 231 (for example, the first elastic member 231 described above) can be used for the other push-pull rod 320 (for example, the second push-pull rod 320 described above) to pass through, and the third through hole 23121 of the other elastic member 231 (for example, the second elastic member 231 described above) is not used for the push-pull rod 320 to pass through (for example, the first push-pull rod 320 described above does not need to pass through the third through hole 23121 of the second elastic member 231). At this time, when the two elastic members 231 still adopt the design of being structurally identical (that is, both are provided with the third through hole 23121), the present disclosure does not need to distinguish between the elastic member 231 with the third through hole 23121 and the elastic member 231 without the third through hole 23121 when assembling the two elastic members 231, thereby further reducing the assembly difficulty and improving the efficiency.

[0085] In an embodiment of the present disclosure, the material of the elastic member 231 can be stainless steel. Through the above design, since the elastic member 231 proposed by the present disclosure does not need to consider current carrying, stainless steel can be used, thereby reducing the material cost.

[0086] As shown in Figure 1 , Figure 4 , Figure 5 and Figure 17 , based on the design that the magnetic circuit part includes the armature assembly 310, in an embodiment of the present disclosure, the support 100 can include a base plate 110, and the relay proposed by the present disclosure can further include an armature cover plate 120, and the base plate 110 and the armature cover plate 120 are both perpendicular to the third direction Z. In particular, the base plate 110 is provided with two supports 111 extending along the third direction Z, and the two supports 111 are arranged in space along the second direction Y, and the two supports 111 and the base plate 110 together form an accommodation space for accommodating the coil assembly 330 and the yoke assembly 340 of the magnetic circuit part. The armature cover plate 120 is connected to the side of the support 111 away from the base plate 110, and the base plate 110 and the armature cover plate 120 are respectively provided with axis holes 112, 121 corresponding in position, and the armature assembly 310 is provided with coaxial shafts 311 on both sides in the third direction Z, and the two shafts 311 are respectively rotatably arranged in the two axis holes 112, 121.

[0087] As shown in Figure 13 , Figure 14 and Figure 17As shown, in an embodiment of the present disclosure, the support 100 comprises a substrate 110, which can be provided with a first slot 113, and correspondingly, the elastic member 231 can be connected with a first insertion piece 2314 at the assembly end 2312, which is inserted into the first slot 113. Through the above structural design, the present disclosure can realize the insertion assembly of the elastic member 231 on the substrate 110 by using the first insertion piece 2314 and the first slot 113, which is convenient to operate and has high efficiency. In other embodiments, the elastic member 231 can also be assembled with the support 100 in other ways, which is not limited to the present embodiment.

[0088] As shown in Figure 3 and Figure 8 , based on the design that the contact part comprises the static contact bridge 210, the two static conductive members 220 and the two dynamic contact bridges 232, in an embodiment of the present disclosure, the two ends of the dynamic contact bridge 232 in the third direction Z (for example, the two dynamic contact points 2322 of the same dynamic contact bridge 232) can correspond to the second static contact point 211 (i.e. the end of the static contact bridge 210) and the static conductive member 220 located on the same side in the second direction Y respectively, avoiding the situation that one side is closed first, and not increasing the space occupation in the second direction Y. Accordingly, the two dynamic contact bridges 232 can realize the arrangement form of being arranged at intervals in the second direction Y, which can reduce the structural complexity and assembly difficulty. In some embodiments, the two ends of the dynamic contact bridge 232 (for example, the two dynamic contact points 2322 of the same dynamic contact bridge 232) can also correspond to the second static contact point 211 (i.e. the end of the static contact bridge 210) and the static conductive member 220 located on different sides in the second direction Y respectively, which is not limited to the present embodiment.

[0089] As shown in Figure 4 , Figure 5 , Figure 8 and Figure 9 , based on the design that the contact part comprises the static contact bridge 210, the two static conductive members 220 and the two dynamic contact bridges 232, in an embodiment of the present disclosure, the static contact bridge 210 has the first end 212 and the second end 213 which are spaced apart in the second direction Y, one of the second static contact points 211 of the static contact bridge 210 is arranged on one side of the first end 212 facing the magnetic circuit part, and the other of the second static contact points 211 of the static contact bridge 210 is arranged on one side of the second end 213 away from the magnetic circuit part. On this basis, along the first direction X, the second end 213 can be closer to the magnetic circuit part than the first end 212. Through the above structural design, the present disclosure can stagger the second static contact points 211 on both sides of the static contact bridge 210 in the first direction X, which is closer to the respective matched dynamic contact bridge 232 accordingly, which is conducive to further reducing the interval of the two groups of dynamic contact bridges 232 in the first direction X, thereby reducing the space occupation of the contact part in the first direction X.

[0090] AsFigure 15 and Figure 17 As shown in FIG. 10, based on the design that the contact portion comprises the static contact bridge 210, the two static conductive pieces 220 and the two dynamic contact bridges 232, in an embodiment of the present disclosure, the relay further comprises the support 100, which can comprise the base plate 110 provided with an assembly platform 114 extending along the third direction Z, and the second slot 115 is arranged on the assembly platform 114, and correspondingly, the middle part of the static contact bridge 210 in the second direction Y can be provided with the second insertion piece 214 which is inserted into the second slot 115. Through the above structural design, the relay of the present disclosure can realize the insertion assembly of the static contact bridge 210 on the base plate 110 by using the second insertion piece 214 and the second slot 115, which is convenient to operate and has high efficiency. In other embodiments, the static contact bridge 210 can also be assembled with the support 100 in other ways, which is not limited to the present embodiment.

[0091] Referring to Figure 18 , Figure 18 FIG. 11 shows a perspective structural schematic view of the contact portion of the relay capable of embodying the principle of the present disclosure in another exemplary embodiment.

[0092] As shown in Figure 18 , in another embodiment of the present disclosure, the contact portion can comprise four static conductive pieces 220, two dynamic contact bridges 232 and two elastic pieces 231. Specifically, the four static conductive pieces 220 are arranged in two pairs, the two pairs are arranged at intervals along the second direction Y, and the two static conductive pieces 220 in the same pair are arranged at intervals along the third direction Z. On this basis, one dynamic contact bridge 232 is arranged corresponding to one pair of static conductive pieces 220, and the first static contact points 221 of the static conductive pieces 220 in the same pair are all located on the side facing the dynamic contact bridge 232. Another dynamic contact bridge 232 is arranged corresponding to another pair of static conductive pieces 220, and the first static contact points 221 of the static conductive pieces 220 in the same pair are all located on the side facing the dynamic contact bridge 232. In other words, the relay proposed by the present disclosure can comprise two pairs of static conductive pieces 220, based on the design concept that when two static conductive pieces 220 located on the same side in the third direction and belonging to different pairs are designed to be connected as a whole, the whole structure is the static contact bridge 210 described above, that is Figures 1 to 17 The embodiments shown in Figure 18 fall within the scope of the design concept represented by the embodiments shown in

[0093] Referring to Figure 19 , Figure 19 FIG. 12 shows a perspective structural schematic view of the contact portion of the relay capable of embodying the principle of the present disclosure in still another exemplary embodiment.

[0094] As shown in Figure 19As shown, in yet another embodiment of the present disclosure, the contact portion can only include a pair of static conductive pieces 220, one moving contact bridge 232 and one elastic piece. Specifically, the two static conductive pieces 220 are arranged in pairs along the third direction Z, the moving contact bridge 232 is arranged corresponding to the pair of static conductive pieces 220, and the first static contact points 221 of the pair of static conductive pieces 220 are located on the side facing the moving contact bridge 232. In other words, the relay proposed by the present disclosure can only include a pair of static conductive pieces 220, i.e. Figure 18 The embodiments shown can be included in the scope of the design concept represented by the embodiments shown Figure 19 Furthermore, the pair of static conductive pieces 220 included in the contact portion is not limited to one pair or two pairs, but can also be three pairs or more.

[0095] Based on the structural design that the contact portion only includes a pair of static conductive pieces 220 and one moving contact bridge 232 (i.e. one push-pull rod 320), the magnetic circuit portion can also include an armature assembly. The armature assembly is located on one side of the contact portion in the first direction X, and the armature assembly is rotatably arranged on the support via a rotating shaft extending parallel to the third direction Z, and the armature assembly has a driving end on one end in the second direction Y. Through the above structural design, the present disclosure can realize that the magnetic circuit portion drives the push-pull rod 320 through the armature assembly, so as to realize the closing and opening of a group of contacts, which is simple in structure and occupies less space.

[0096] As described above, in various possible embodiments consistent with the design concept of the present disclosure, the contact portion of the relay proposed by the present disclosure includes at least a pair of static conductive pieces 220, at least one moving contact bridge 232 and at least one elastic piece 231. The side of the static conductive piece 220 in the first direction X is provided with a static contact point (such as the first static contact point 211 or the second static contact point 221). The two static conductive pieces 220 in the same pair are arranged at intervals along the third direction Z. The elastic piece 231 has contact end 2311 and assembly end 2312 on two ends in the second direction Y, respectively, the elastic piece 231 is assembled to the support 100 with the assembly end 2312, and the moving contact bridge 232 is arranged on the side of the contact end 2311 facing the static conductive piece 220. The push-pull rod 320 extends along the first direction X, one end thereof is connected to the magnetic circuit portion, and the other end thereof is in push-pull cooperation with the contact end 2311. The magnetic circuit portion can drive the push-pull rod 320 to move along the first direction X, so that the push-pull rod 320 pushes and pulls the elastic piece 231 or the moving contact bridge 232 to make the moving contact bridge 232 move along the first direction X, the elastic piece 231 deforms when the push-pull rod 320 pushes and pulls, and drives the moving contact bridge 232 to reset when the pushing and pulling of the push-pull rod 320 weakens or disappears.

[0097] Further, based on the above design concept, the contact portion can include two pairs of static conductive pieces 220. At this time, the moving contact bridge 232 and the elastic piece 231 can each be two. Further, when the contact portion includes two pairs of static conductive pieces 220, two static conductive pieces 220 that are located on the same side in the third direction Z and belong to different pairs respectively can be connected as one to form the static contact bridge 210.

[0098] It should be noted here that the relays shown in the drawings and described in the present specification are only a few examples of many kinds of relays that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details or any components of the relays shown in the drawings or described in the present specification.

[0099] In summary, the contact portion of the relay proposed by the present disclosure includes at least one pair of static conductive pieces 220, at least one moving contact bridge 232, and at least one elastic piece 231; the side of the static conductive piece 220 in the first direction X is provided with a static contact point; the two ends of the elastic piece 231 in the second direction Y are respectively a contact end 2311 and an assembly end 2312, the second direction Y is perpendicular to the first direction X, the elastic piece 231 is assembled to the support 100 with the assembly end 2312, and the moving contact bridge 232 is arranged on the side of the contact end 2311 facing the static conductive piece 220; the push-pull rod 320 extends along the first direction X, one end thereof is connected to the magnetic circuit portion, and the other end thereof is in push-pull cooperation with the contact end 2311; the magnetic circuit portion can drive the push-pull rod 320 to push and pull the elastic piece 231 or the moving contact bridge 232 to move along the first direction X, the elastic piece 231 deforms when being pushed and pulled by the push-pull rod 320, and drives the moving contact bridge 232 to reset when the contact portion changes from the on state to the off state. Through the above structural design, the present disclosure can realize the reset-off of the moving contact bridge 232 after being closed by using the elastic piece 231. Since the combination design of the moving contact bridge 232 and the elastic piece 231 is adopted, the moving contact bridge 232 serves as a current-carrying piece, i.e., the elastic piece 231 does not provide current-carrying, so that the horn mouth in the off state of the contact can be avoided while the contact gap is increased by adjusting the position of the elastic piece 231, the central arc is ensured, and the life reliability of the relay is improved. In addition, since the elastic piece 231 does not carry current but only needs to provide elastic force, the elastic piece 231 can be made of a material with lower cost and does not need to consider its current-carrying capacity.

[0100] The exemplary embodiments of the relay presented by the present disclosure are described and / or illustrated above. However, the embodiments of the present disclosure are not limited to the specific embodiments described above, but include each and every implementation of the present disclosure. No component or step of the described embodiments can be created or performed in a way that is not according to the present disclosure. Each component and / or step of one embodiment can be used in combination with each component and / or step of the other embodiments. Where the description above describes components and / or steps as being a single component and / or step, or multiple components and / or steps, it is contemplated that each component and / or step can be used in combination with each other component and / or step. The words "a" and "one" do not exclude the plural, and "at least one" does not exclude a plurality. The mere fact that different features are recited in mutually different dependent claims does not indicate that the

[0101] Although the relay presented by the present disclosure has been described in accordance with various specific embodiments, it is evident that modifications and alterations can be made by those skilled in the art on the basis of the preceding description without departing from the scope of the present disclosure.

Claims

1. A relay, characterized in that: the relay comprises a support, a contact part, a push-pull rod and a magnetic circuit part; the contact part comprises at least one pair of static conductive pieces, at least one dynamic contact bridge and at least one elastic piece; the static conductive pieces are provided with static contact points on the side in a first direction; the elastic piece is provided with a contact end and an assembly end at both ends in a second direction, the second direction being perpendicular to the first direction, the assembly end of the elastic piece is assembled to the support, and the dynamic contact bridge is arranged on the side of the contact end facing the static conductive pieces; the push-pull rod extends along the first direction, one end of the push-pull rod is connected to the magnetic circuit part, and the other end of the push-pull rod is in push-pull cooperation with the contact end; wherein the magnetic circuit part can drive the push-pull rod to move along the first direction, so that the push-pull rod pushes and pulls the elastic piece or the dynamic contact bridge to move along the first direction, the elastic piece deforms when the push-pull rod pushes and pulls, and drives the dynamic contact bridge to reset when the contact part changes from a conducting state to an open state.

2. The relay according to claim 1, characterized in that The two static conductive pieces of the same pair are arranged at intervals along a third direction, and the third direction is perpendicular to the first direction and perpendicular to the second direction.

3. The relay according to claim 2, characterized in that The contact part further comprises a reed, one end of the reed is connected to the elastic piece, and the other end of the reed is bent and extended away from the static conductive pieces; wherein the push-pull rod is provided with two push-pull blocks spaced apart along the first direction, and the two push-pull blocks are respectively located on the side of the elastic piece away from the static contact points and the side of the dynamic contact bridge facing the static conductive pieces, and one of the push-pull blocks is used to push the side of the other end of the reed away from the static conductive pieces.

4. The relay according to claim 3, characterized in that The contact end of the elastic piece is provided with a first through hole, the dynamic contact bridge is provided with a second through hole, and the first through hole and the second through hole are in communication to form a through channel; the push-pull rod passes through the through channel.

5. The relay of claim 4, wherein One end of the reed is integrally connected to the hole wall of the first through hole.

6. The relay of claim 4, wherein The side of the dynamic contact bridge facing the static conductive pieces is provided with two dynamic contact points, and the two dynamic contact points are arranged at intervals along the third direction, and the two dynamic contact points are respectively used to contact and cooperate with the static contact points of the two static conductive pieces of the same pair; wherein the second through hole is located between the two dynamic contact points.

7. The relay of claim 3, wherein The side of the reed away from the static conductive pieces is provided with two limiting protrusions, and the two limiting protrusions are arranged at intervals along the third direction to limit the two sides of the push-pull block in the third direction when the push-pull block pushes the reed.

8. The relay of claim 1, wherein The support comprises a base plate, the base plate is provided with a first insertion slot, the elastic piece is connected with a first insertion piece at the assembly end, and the first insertion piece is inserted into the first insertion slot.

9. The relay of claim 1, wherein The material of the elastic piece is stainless steel.

10. The relay according to any one of claims 1 to 7, characterized in that The magnetic circuit part comprises an armature assembly; the armature assembly is located on one side of the contact part in the first direction and is rotatably arranged on the support via a rotating shaft extending in parallel to a third direction, the third direction being perpendicular to the first direction and perpendicular to the second direction, and the armature assembly has a driving end on one end in the second direction; one end of the push-pull rod is connected to the driving end, and the other end is in push-pull cooperation with the contact end of the elastic member; wherein the magnetic circuit part can drive the armature assembly to rotate so that the armature assembly drives the push-pull rod to move along the first direction.

11. The relay according to claim 10, characterized in that The support comprises a base plate, and the relay further comprises an armature cover plate, both of which are perpendicular to the third direction; the base plate is provided with two supports extending in the third direction, and the two supports are arranged in the second direction; the two supports and the base plate jointly form an accommodation space for accommodating the coil assembly and the yoke assembly of the magnetic circuit part; the armature cover plate is connected to the side of the support away from the base plate, and the base plate and the armature cover plate are respectively provided with axis holes corresponding in position; the armature assembly is provided with coaxial rotating shafts on both sides in the third direction, and the two rotating shafts are rotatably arranged in the two axis holes, respectively.

12. The relay of claim 1, wherein, The contact part comprises two pairs of static conductive pieces, two dynamic contact bridges and two elastic members; the two pairs of static conductive pieces are arranged in the second direction; one dynamic contact bridge is arranged on one side of one pair of static conductive pieces in the first direction, and the other dynamic contact bridge is arranged on the other side of the other pair of static conductive pieces in the first direction; the relay comprises two push-pull rods, and the two push-pull rods are arranged corresponding to the two dynamic contact bridges, respectively; wherein the magnetic circuit part can drive the two push-pull rods to move synchronously and reversely along the first direction, so that the two dynamic contact bridges move synchronously and reversely along the first direction, so that the two dynamic contact bridges are simultaneously turned on or turned off with the corresponding static contact points.

13. The relay of claim 12, wherein, The two static conductive pieces in the same pair are arranged in the third direction, which is perpendicular to the first direction and perpendicular to the second direction; the two static conductive pieces belonging to different pairs and located on the same side in the third direction are connected to form a static contact bridge.

14. The relay of claim 13, wherein, The static contact bridge has a first end and a second end spaced apart in the second direction; one static contact point is arranged on the side of the first end facing the magnetic circuit part, and the other static contact point is arranged on the side of the second end away from the magnetic circuit part; wherein, along the first direction, the second end is closer to the magnetic circuit part than the first end.

15. The relay of claim 13, wherein, The support comprises a base plate, and the base plate is provided with an assembly table extending in the third direction, and the assembly table is provided with a second slot; the static contact bridge is provided with a second insertion piece in the middle in the second direction, and the second insertion piece is inserted into the second slot.

16. The relay of claim 13, wherein In the on state, the current flows from one of the static conductive members to the movable contact bridge connected thereto, through the movable contact bridge to the static contact point of the static contact bridge, from one end of the static contact bridge in the second direction to the other end, through the static contact point of the static contact bridge to the other movable contact bridge connected thereto, and from the other movable contact bridge to the other static conductive member connected thereto.

17. The relay of claim 12, wherein, The magnetic circuit portion comprises an armature assembly; the armature assembly is located on one side of the contact portion in the first direction and is rotatably arranged on the support via a rotating shaft extending in a third direction perpendicular to the first direction and perpendicular to the second direction, and both ends of the armature assembly in the second direction are respectively provided with driving end portions; one end of each of the two push-pull rods is connected to the two driving end portions, and the other end of each is in push-pull cooperation with the contact end portion of the two elastic members; wherein the magnetic circuit portion can drive the armature assembly to rotate so that the armature assembly drives the two push-pull rods to move synchronously and reversely along the first direction.

18. The relay of claim 17, wherein, The elastic member is provided with a third through hole at the assembly end portion; wherein, along the first direction, the elastic member closer to the armature assembly is a first elastic member, the other elastic member is a second elastic member, the push-pull rod in push-pull cooperation with the first elastic member is a first push-pull rod, and the other push-pull rod is a second push-pull rod, and the second push-pull rod passes through the third through hole of the first elastic member.

19. The relay of claim 18, wherein, The third through hole is trapezoidal or triangular, and the large end of the trapezoid or triangle faces the contact end portion.

20. The relay of claim 12, wherein, The two elastic members are two components that are completely identical in structure and axially symmetric in space, and the symmetry axis is parallel to a third direction perpendicular to the first direction and perpendicular to the second direction.

21. The relay of claim 12, wherein, The two ends of the movable contact bridge in the third direction correspond to the static contact points of a pair of static conductive members located on the same side in the second direction, respectively, and the third direction is perpendicular to the first direction and perpendicular to the second direction.

22. The relay according to any one of claims 2 to 7, characterized in that The contact portion comprises two pairs of static conductive members, two movable contact bridges, and two elastic members; the two pairs of static conductive members are arranged at intervals along the second direction; one of the movable contact bridges is arranged on one side of one pair of static conductive members in the first direction, and the other movable contact bridge is arranged on the other side of the other pair of static conductive members in the first direction; the relay comprises two push-pull rods, and the two push-pull rods are arranged corresponding to the two movable contact bridges, respectively; wherein the magnetic circuit portion can drive the two push-pull rods to move synchronously and reversely along the first direction, so that the two movable contact bridges move synchronously and reversely along the first direction, so that the two movable contact bridges and the corresponding static contact points are simultaneously connected or disconnected.

23. The relay of claim 22, wherein: Two of the static conductive members belonging to the same pair are arranged apart along the third direction; two of the static conductive members belonging to different pairs and located on the same side along the third direction are connected to form a static contact bridge; and / or The magnetic circuit part comprises an armature assembly; the armature assembly is located on one side of the contact part in the first direction and is rotatably arranged on the support via a rotating shaft extending parallel to the third direction, two ends of the armature assembly in the second direction respectively have driving end portions; one end of each of the two push-pull rods is connected to the two driving end portions respectively, and the other end of each is in push-pull cooperation with the contact end portion of the two elastic members respectively; wherein the magnetic circuit part can drive the armature assembly to rotate so that the armature assembly drives the two push-pull rods to move synchronously and reversely along the first direction; and / or The two elastic members are two components which are completely identical in structure and are arranged in axial symmetry in space, and the axis of symmetry is parallel to the third direction; and / or The two ends of the movable contact bridge in the third direction respectively correspond to the static contact points of a pair of static conductive members located on the same side in the second direction.

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