Electromagnetic relay and electric device

Abstract

The utility model discloses an electromagnetic relay and a power utilization device. The electromagnetic relay comprises a static contact assembly provided with a static contact, a movable spring assembly, a first magnetic conductive piece and a second magnetic conductive piece. The movable spring assembly comprises a movable spring body and a movable contact arranged on the movable spring body; one end of the movable spring body is a fixed end, and the other end is a movable end; and the movable contact can be in contact with or separated from the static contact. The first magnetic conducting piece is fixedly connected with the insulating structure and is located in a magnetic field corresponding to the part, used for current circulation, of the movable spring body; the second magnetic conducting piece is fixedly connected to the side, away from the static contact, of the movable spring body, the second magnetic conducting piece and the first magnetic conducting piece are oppositely arranged, and when the movable contact and the static contact are closed and conducted, the first magnetic conducting piece and the second magnetic conducting piece form a closed magnetic loop based on current flowing in the movable spring body and generate electromagnetic attraction force; and the movable contact and the static contact are driven to resist the electric repulsive force and keep a closed conduction state. The relay provided by the embodiment of the utility model has the advantages of excellent short-circuit resistance, low consumption of copper consumables and low cost.

Description

Technical Field

[0001] This application belongs to the field of relay technology, specifically relating to an electromagnetic relay and an electrical device. Background Technology

[0002] In the electrical engineering industry, relays are widely used as control devices. They have a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and are typically used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] A magnetic latching relay is a type of relay. In existing magnetic latching relays, when a fault occurs during operation, the short-circuit current will cause a large electro-repulsive force to be generated between the moving and stationary contacts. Under the action of the electro-repulsive force, the moving and stationary contacts will be forced to separate and form an extremely strong fault arc, which will damage the relay. In severe cases, it may cause the relay to explode.

[0004] Therefore, it is necessary to overcome the electrodynamic repulsion between the moving and stationary contacts to improve the operational reliability and product quality of the magnetic latching relay. To address this issue, existing technologies typically connect the moving spring lead to the side of the moving spring body away from the moving contact in the moving spring assembly, with the current direction of the lead opposite to that of the moving spring body. This causes the moving spring body to experience an Ampere force from the magnetic field generated by the lead, increasing the contact pressure between the moving and stationary contacts. However, this structure results in a large volume for the moving spring assembly and a long lead, leading to higher material consumption and cost. Utility Model Content

[0005] The purpose of this application is to provide an electromagnetic relay that can solve the problem that existing relays require a large amount of material for the moving spring assembly and have high costs in order to ensure operational reliability.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] In a first aspect, embodiments of this application provide an electromagnetic relay, the electromagnetic relay comprising:

[0008] A static contact assembly, the static contact assembly including a static contact point;

[0009] A movable spring assembly includes a movable spring body and a movable contact disposed on the movable spring body; one end of the movable spring body is a fixed end that keeps the stationary contact assembly relatively stationary, and the other end is a movable end that can swing relative to the stationary contact assembly; wherein, the movable contact is disposed close to the movable end, and the movable contact can contact or separate from the stationary contact.

[0010] The first magnetic conductive element is fixedly connected to an insulating structure that is fixed relative to the stationary contact assembly and is located on the side of the moving spring body facing the stationary contact.

[0011] The second magnetic conductive element is fixed to the side of the moving spring body away from the stationary contact and located between the moving contact and the fixed end. The second magnetic conductive element is disposed opposite to the first magnetic conductive element.

[0012] Optionally, the electromagnetic relay further includes:

[0013] Magnetic circuit drive mechanism;

[0014] A compression spring, one end of which is fixedly connected to the moving spring body and fixed at the location of the moving contact or between the fixed end and the moving contact, and the other end of which extends obliquely relative to the moving spring body and can be deformed by the magnetic circuit drive mechanism to provide contact pressure to the moving contact.

[0015] Optionally, the compression spring includes a first segment and a second segment, with both ends of the first segment fixedly connected to the moving spring body and one end of the second segment, respectively, and the other end of the second segment used for the magnetic circuit drive mechanism to abut against it; the angle of inclination of the first segment relative to the moving spring body is greater than the angle of inclination of the second segment relative to the moving spring body.

[0016] Optionally, when the compression spring deforms, the first segment does not deform relative to the moving spring body, while the second segment deforms relative to the moving spring body.

[0017] Optionally, the length of the first segment is less than or equal to the length of the second segment.

[0018] Optionally, one end of the compression spring is fixed between the second magnetic conductor and the moving contact.

[0019] Optionally, the electromagnetic relay further includes:

[0020] Magnetic circuit drive mechanism;

[0021] A compression spring, one end of which is fixedly connected to the moving spring body and fixed at the location of the moving contact or between the moving contact and the movable end, and the other end of which extends obliquely relative to the moving spring body to the side of the moving contact facing the fixed end, and can be deformed by a magnetic circuit drive mechanism to provide contact pressure to the moving contact.

[0022] Optionally, the moving spring body is provided with a gap, the extension direction of the gap is parallel or inclined to the extension direction of the moving spring body, and at least part of the gap extends to the part of the moving spring body that fixes the second magnetic conductor.

[0023] Optionally, when the moving contact and the stationary contact are in contact and closed, the gap between the first magnetic conductor and the second magnetic conductor is less than a preset value.

[0024] Optionally, the second magnetic conductor has a first dimension, parallel to the extending direction of the moving spring body;

[0025] Parallel to the width direction of the moving spring body, the second magnetic conductor has a second dimension;

[0026] The second dimension is larger than the first dimension.

[0027] Optionally, parallel to the width direction of the moving spring body, the size of the first magnetic conductor is larger than the size of the second magnetic conductor.

[0028] Optionally, the electromagnetic relay further includes a housing, and the moving spring assembly further includes a moving spring lead-out piece; a portion of the moving spring lead-out piece is fixedly connected to the housing and is fixedly connected to the fixed end and electrically connected, and another portion of the moving spring lead-out piece extends outward from the housing and protrudes from the housing;

[0029] The movable spring lead-out piece is provided with at least one limiting protrusion, the protrusion direction of the limiting protrusion intersects with the extension direction of the movable spring lead-out piece, and at least one limiting groove is provided inside the housing, the limiting protrusion being embedded in the limiting groove.

[0030] Optionally, the limiting groove includes a first limiting groove and a second limiting groove, and the limiting protrusion includes a first limiting protrusion and a second limiting protrusion;

[0031] The first limiting protrusion and the second limiting protrusion are disposed at different positions on the moving spring lead-out piece;

[0032] The first limiting protrusion is embedded in the first limiting groove, and the second limiting protrusion is embedded in the second limiting groove.

[0033] Optionally, the first limiting protrusion and the second limiting protrusion are staggered and spaced apart along the direction in which the moving spring leads extend outward from the inside of the housing.

[0034] Optionally, the first limiting protrusion is in an interference fit with the first limiting groove; and / or, the second limiting protrusion is in an interference fit with the second limiting groove.

[0035] Optionally, along the extending direction of the spring lead-out piece, the first limiting protrusion is farther from the spring body than the second limiting protrusion;

[0036] The first limiting protrusion is interference-fitted with the first limiting groove, and the second limiting protrusion is clearance-fitted with the second limiting groove.

[0037] Optionally, the static contact assembly further includes a static contact body, the static contact point is fixed to the static contact body, a portion of the static contact body is fixed inside the housing and for the static contact point to be fixed, and another portion extends outward from inside the housing and protrudes from the housing.

[0038] A support boss is provided on the housing at the part where the stationary contact body extends outward, and the part of the stationary contact body exposed outside the housing abuts against the support boss.

[0039] Optionally, the support boss includes a support portion and a stop portion connected to opposite sides of the support portion. The stop portion and the support portion are connected to form a third limiting groove, and the static contact body is embedded in the third limiting groove and abuts against the support portion.

[0040] Optionally, the support portion is provided with a first positioning structure, and the stationary contact body is provided with a second positioning structure. The first positioning structure and the second positioning structure cooperate with each other to restrict the stationary contact body from translating relative to the housing along the extension direction of the stationary contact body.

[0041] Optionally, one of the first positioning structure and the second positioning structure is a positioning post and the other is a positioning hole, with the positioning post passing through the positioning hole.

[0042] Optionally, the support includes a first surface and a second surface disposed opposite to each other. The first surface is perpendicular to the side wall of the housing from which the static contact body extends, and the second surface intersects the side wall of the housing from which the static contact body extends at an obtuse angle. The static contact body abuts against the first surface.

[0043] Optionally, the stationary contact body includes a first fixing part and a first load connecting part that are integrally connected and are both sheet-like. The stationary contact is fixed to the first fixing part, and the first load connecting part extends outward from the housing and protrudes from the housing. The first load connecting part is connected to one side of the first fixing part along the width direction of the moving spring body and is perpendicular to the first fixing part. The thickness direction of the first load connecting part is parallel to the width direction of the moving spring body.

[0044] Optionally, the movable spring lead-out sheet includes a second fixing part and a second load connecting part that are integrally connected and both are sheet-shaped. The fixing end is riveted to the second fixing part, and the second load connecting part extends outward from the housing and protrudes from the housing. The second load connecting part is connected to the side of the second fixing part away from the movable end and is perpendicular to the second fixing part. The thickness direction of the second load connecting part is perpendicular to the width direction of the movable spring body.

[0045] Optionally, the stationary contact body and the moving spring lead-out plate extend from the same side wall of the housing.

[0046] Optionally, the electromagnetic relay further includes a cover, the housing having an opening; the stationary contact assembly, the moving spring assembly, the first magnetic conductor, and the second magnetic conductor can be inserted into the housing through the opening; the cover is fixedly connected to the opening of the housing and cooperates with the housing to restrict the displacement of the stationary contact body and the moving spring lead-out piece along the width direction of the moving spring body.

[0047] Optionally, an arched bend is provided between the movable end and the fixed end, and the second magnetic conductor is fixed between the bend and the movable contact.

[0048] Optionally, in the contact direction between the moving contact and the stationary contact, the portion of the first magnetic conductor used for magnetic conduction is closer to the moving spring body than the stationary contact.

[0049] Optionally, the moving spring body includes multiple moving spring branches arranged in parallel, and each moving spring branch is provided with the moving contact;

[0050] Each of the moving spring branches is fixed with a second magnetic conductor in the part for carrying current, and each second magnetic conductor corresponds to one first magnetic conductor or to the same first magnetic conductor.

[0051] Optionally, the housing is provided with a snap-fit ​​groove, and the first magnetic conductive element is embedded in the snap-fit ​​groove.

[0052] Optionally, the magnetic circuit drive mechanism includes a magnetic circuit part and a pusher, wherein the magnetic circuit part has a magnetic holding function and includes an armature assembly and a coil assembly;

[0053] One end of the pusher is connected to the armature assembly, and the other end is provided with an assembly groove; the movable end and the end of the compression spring are assembled into the assembly groove;

[0054] The electromagnetic force generated by the coil assembly drives the armature assembly to rotate, and the armature assembly drives the movable end to move through the pusher.

[0055] Secondly, embodiments of this application also disclose an electrical device, which includes any of the electromagnetic relays described in the first aspect above.

[0056] Optionally, the electrical device includes an electricity meter.

[0057] In this embodiment, the magnetic attraction of the first and second magnetic components allows the moving and stationary contacts to resist the electrodynamic repulsion caused by the large short-circuit current, thus maintaining a closed conducting state and improving the reliability of the relay. Since the stationary contact assembly typically needs to be connected to an external load device, the stress generated during connection may affect the positional stability of the assembly. Therefore, if the first magnetic component is directly installed on either the energized or non-energized part of the stationary contact assembly, the accuracy of its position will also be affected, potentially increasing the magnetic resistance between it and the second magnetic component, reducing the magnetic attraction force, and impacting the short-circuit withstand capability. Therefore, the fixed connection between the first magnetic component and the insulating structure fixed relative to the stationary contact assembly further ensures the stability and reliability of the magnetic attraction. Furthermore, the first magnetic conductor is mounted on an insulating structure, which prevents the moving spring assembly and the stationary contact assembly from conducting through the first and second magnetic conductors. This prevents the two magnetic conductors from overheating and increases the contact resistance between the moving spring assembly and the stationary contact assembly, thus avoiding interference with the magnetic flux of the two magnetic conductors, ensuring magnetic attraction, and guaranteeing the contact reliability of the moving spring assembly and the stationary contact assembly. In addition, in this embodiment, since magnetic attraction is used to enhance the contact attraction performance of the moving contact and the stationary contact against short circuits, it is not necessary to use more copper consumables to make a moving spring assembly with a larger structural volume, which also helps to reduce the amount and cost of copper consumables.

[0058] In addition, the contact portions of other embodiments of this application have the following advantages:

[0059] 1) By connecting a compression spring to the side of the moving spring body away from the stationary contact, when the moving contact and the stationary contact are in contact, the magnetic circuit drive mechanism pushes the compression spring towards the stationary contact side and continues to move towards the stationary contact side to form an overtravel, so that the compression spring is deformed and provides contact pressure to the moving spring body, thereby providing additional clamping force to the moving contact, making the contact between the moving contact and the stationary contact more reliable, which can improve the short-circuit resistance of the relay. Specifically, the compression spring is fixed at the position of the moving contact or fixed between the moving contact and the fixed end, so that when the part of the moving spring body located between the moving contact and the fixed end is deformed towards the first magnetic element due to the magnetic attraction of the first magnetic element and the second magnetic element, the compression spring can tilt and form a greater abutting force with the magnetic circuit drive mechanism, thereby further making the contact between the moving contact and the stationary contact more reliable and improving the short-circuit resistance of the relay.

[0060] 2) On the compression spring, the angle of inclination of the first segment relative to the moving spring body is greater than that of the second segment relative to the moving spring body. When the compression spring deforms, the second segment deforms preferentially over the first segment, with its connection point with the first segment as the fulcrum. The first segment deforms less or not at all. By setting the first segment, the distance between the end of the second segment and the moving spring body is increased, making the distance between the two surfaces on the magnetic circuit drive mechanism that are used for the second segment and the moving spring body to abut against each other larger. Thus, when the part of the moving spring body located between the moving contact and the fixed end deforms towards the first magnetic conductor, the moving end of the moving spring body will not abut against the magnetic circuit drive mechanism and destroy the magnetic attraction force of the magnetic circuit drive mechanism, thereby improving the stability of the entire magnetic circuit drive mechanism and ensuring that the short-circuit resistance performance of the first and second magnetic conductors is always reliable and effective. In addition, compared with the compression spring structure that forms a large inclination directly with the moving spring body, the second segment has less stress concentration at its connection point with the first segment, has better fatigue resistance, and a longer service life.

[0061] 3) When the compression spring deforms, the first section does not deform, ensuring that the second section and the moving spring body can still have a large gap during overtravel, so as to avoid the moving spring body from pushing the magnetic circuit drive mechanism back due to deformation.

[0062] 4) The length of the first segment is less than or equal to the length of the second segment, ensuring that the first segment has higher rigidity than the second segment and is less prone to deformation;

[0063] 5) Fix one end of the compression spring between the moving contact and the movable end, and extend the other end to the side of the moving contact facing the fixed end. When the part of the moving spring body located between the moving contact and the fixed end deforms towards the first magnetic conductor, the compression spring and the magnetic circuit drive mechanism will form a greater resistance force, thereby making the contact between the moving contact and the stationary contact more reliable and improving the short-circuit resistance of the relay.

[0064] 6) The gaps machined into the moving spring body can reduce the constraint on the moving spring body after the rigid second magnetic conductor is fixed to the moving spring body, which helps to improve the flexibility and elasticity of the moving spring body, reduce the force required to push the moving contact, reduce the voltage required for the magnetic circuit to form electromagnetic force, and reduce the energy consumption of the relay.

[0065] 7) When the moving contact and the stationary contact are closed, the gap between the first magnetic conductor and the second magnetic conductor is designed to be less than the preset value. This can prevent the large gap between the two from providing a large stroke for the movement of the second magnetic conductor, and can prevent the moving end of the moving contact from rotating in the opposite direction and acting on the magnetic circuit drive mechanism. This can reduce the risk of the moving contact and the stationary contact separating and disconnecting.

[0066] 8) The height of the second magnetic conductor is greater than its width, which can reduce the constraint on the elasticity of the moving spring body. This also helps to reduce the electromagnetic force required by the magnetic circuit drive mechanism to drive the moving contact, and helps to reduce the voltage required by the magnetic circuit drive mechanism to generate electromagnetic force, thus reducing the energy consumption of the relay.

[0067] 9) The fit between the upper limit protrusion of the moving spring lead-out piece and the upper limit groove of the housing can improve the fixing reliability of the moving spring lead-out piece and its ability to resist outward pulling stress, prevent the position of the moving spring lead-out piece from moving and avoid causing changes in the magnetic gap between the two magnetic conductors, which would lead to the failure of the short circuit protection function.

[0068] 10) The support boss on the outside of the housing can improve the fixing reliability of the static contact body;

[0069] 11) The structure and extension direction of the moving spring lead-out piece and the stationary contact body avoid the reciprocating bending of these two parts in the housing, which can avoid occupying too much space inside the housing and is conducive to the miniaturization of the relay. Attached Figure Description

[0070] Figure 1 This is an isometric schematic diagram of an electromagnetic relay according to an embodiment of this application;

[0071] Figure 2 This is an embodiment of the present application. Figure 1 A schematic diagram along the Z-direction;

[0072] Figure 3 This is a schematic diagram of the spring setting position of an electromagnetic relay according to an embodiment of this application;

[0073] Figure 4 This is a schematic diagram of the contact portion of an electromagnetic relay according to an embodiment of this application;

[0074] Figure 5 This is a schematic diagram of the structure of a movable spring body according to an embodiment of this application;

[0075] Figure 6 This is an embodiment of the present application. Figure 2 A cross-sectional view of position AA in the middle;

[0076] Figure 7 This is an isometric schematic diagram of the moving spring lead-out piece according to an embodiment of this application;

[0077] Figure 8 This is an embodiment of the present application. Figure 6 A schematic diagram along the Z-direction;

[0078] Figure 9 This is a schematic diagram of the housing of an electromagnetic relay according to an embodiment of this application;

[0079] Figure 10 This is an isometric schematic diagram of the housing of an electromagnetic relay according to an embodiment of this application;

[0080] Figure 11 This is a schematic diagram of a static contact component according to an embodiment of this application;

[0081] Figure 12 This is a schematic diagram of a pusher according to an embodiment of this application;

[0082] Figure 13 This is a schematic diagram of the connection between the moving spring body, the compression spring, and the pushing member in an embodiment of this application.

[0083] Figure label:

[0084] Housing-10, stationary contact assembly-11, moving spring assembly-12, first magnetic conductor-13, second magnetic conductor-14, pusher-15, compression spring-16, armature assembly-17, coil assembly-18, limiting groove-102, support boss-103, stationary contact-111, stationary contact body-112, moving spring body-121, fixed end-121a, movable end-121b, moving contact-122, moving spring lead-out piece-123, bent part-121c, assembly groove-151, support part-1031, stop part-1032, first limiting groove-10 21, Second limiting groove-1022, First fixing part-112a, First load connecting part-112b, Second fixing part-123a, Second load connecting part-123b, Gap-1211, Limiting protrusion-1231, First surface-1031a, Second surface-1031b, First limiting protrusion-12311, Second limiting protrusion-12312, First positioning structure-10311, Second positioning structure-1121. Detailed Implementation

[0085] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0086] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0087] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0088] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0089] The electromagnetic relay provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0090] like Figure 1 and Figure 2The diagram shows a schematic representation of an electromagnetic relay according to an embodiment of this application. This electromagnetic relay includes: a stationary contact assembly 11, a moving spring assembly 12, a first magnetic conductor 13, and a second magnetic conductor 14. The stationary contact assembly 11 and the moving spring assembly 12 are conductive components in the electromagnetic relay used to connect to an external load circuit. The stationary contact assembly 11 includes a stationary contact 111. The moving spring assembly 12 includes a moving spring body 121, which can be a flexible metal spring structure. One end of the moving spring body 121 is a fixed end 121a, which can be riveted and fixed inside the electromagnetic relay, remaining relatively stationary with respect to the stationary contact assembly 11. The other end of the moving spring body 121 is a movable end 121b, which can swing relative to the stationary contact assembly 11. A moving contact 122 is provided near the movable end 121b. The moving contact 122 can be a hemispherical or frustum-shaped protrusion structure with a higher conductivity than the moving spring body 121. When the movable end 121b of the moving spring body 121 swings, it causes the moving contact 122 to contact or separate from the stationary contact 111, thereby realizing the on / off control of the electromagnetic relay.

[0091] In some embodiments, the moving spring assembly 12 is disposed on one side of the stationary contact assembly 11, for example... Figure 1 In the schematic diagram, the moving spring body 121 is located below the stationary contact assembly 11, and the moving contact 122 is located below the stationary contact 111, with the moving contact 122 and the stationary contact 111 facing each other. Because the moving spring body 121 itself is elastic, the unconstrained movable end 121b can swing relative to the fixed end 121a, causing the moving contact 122 to contact or separate from the opposite stationary contact 111. Specifically, inside the relay, the movable end 121b of the moving spring body 121 can be connected to the magnetic circuit drive mechanism in the relay. The driving force output by the magnetic circuit drive mechanism acts on the movable end 121b, causing it to swing.

[0092] In addition, such as Figure 2 As shown in the embodiment of this application, a first magnetic conductor 13 and a second magnetic conductor 14 that can magnetically attract each other are also provided for the static contact assembly 11 and the moving spring assembly 12. The magnetic attraction between the two allows the moving contact 122 and the static contact 111 to resist the electric repulsion caused by the short circuit current, thereby maintaining a closed and conductive state.

[0093] Specifically, in combination Figure 2 and Figure 3As illustrated, the first magnetic conductive element 13 can be mounted and fixed on an insulating structure that is stationary relative to the static contact assembly 11, and is located within the magnetic field formed when current flows through the portion of the moving spring body 121 used for current flow, and is located between the moving contact 122 and the fixed end 121a in the extending direction of the moving spring body 121. Therefore, the first magnetic conductive element 13 is a stationary fixed magnetic conductive element. In some embodiments, when the electromagnetic relay has a housing 10, the insulating structure can be the housing 10 itself, or it can be an insulating component such as a coil frame or a fixing frame fixed to the housing 10. Specifically, in one embodiment of this application, the insulating structure is the housing 10.

[0094] In this embodiment, the second magnetic conductor 14 and the moving spring body 121 can be riveted, welded, or bonded together, and are located on the side away from the stationary contact 111, forming a positional relationship of facing each other with the first magnetic conductor 13. Figure 4 Taking this example, the first magnetic conductor 13 is located above the part of the moving spring body 121 used for current flow and is in a static and fixed state. The second magnetic conductor 14 is located on the part of the moving spring body 121 used for current flow and can move with the movement of the moving contact 122.

[0095] Once the moving contact 122 moves to contact and conduct with the stationary contact 111, the magnetic field formed by the current flowing through the moving spring body 121 will also magnetize the second magnetic conductor 14. Thus, a closed magnetic circuit is formed around the moving spring body 121 between the first magnetic conductor 13 and the second magnetic conductor 14, generating a magnetic attraction force. This high magnetic efficiency helps ensure that the moving contact 122 and the stationary contact 111 resist the electric repulsion force with a larger and more stable contact force, preventing the moving contact 122 from being pushed apart by the electric repulsion force. It should be noted that the second magnetic conductor 14 and the first magnetic conductor 13 can be magnetic blocks or sheets made of the same or different materials, such as iron, cobalt, nickel, and their alloys.

[0096] Furthermore, in conjunction with the aforementioned description of the connection of the first magnetic conductive element 13, on the one hand, directly fixing the first magnetic conductive element 13 to the insulating structure can avoid excessive assembly relationships caused by indirectly fixing the first magnetic conductive element 13 through other parts. This helps ensure that the first magnetic conductive element 13 remains stably and reliably stationary, helps ensure magnetic gap stability, and also saves copper consumption costs associated with other parts. On the other hand, once a short circuit occurs in the relay, causing a large current that attracts the first magnetic conductive element 13 and the second magnetic conductive element 14, the first magnetic conductive element 13, isolated by the insulating structure, can prevent the first magnetic conductive element 13 and the second magnetic conductive element 14 from conducting and generating heat together, thus preventing the magnetic flux of both from being weakened. This helps to maintain the magnetic attraction force and ensure that the performance against electrodynamic repulsion is not reduced.

[0097] In summary, the electromagnetic relay of this embodiment utilizes the magnetic attraction of the first magnetic element 13 and the second magnetic element 14 to maintain a closed conducting state by resisting the electrodynamic repulsion of the large short-circuit current between the moving contact 122 and the stationary contact 111 when a large short-circuit current occurs, thereby improving the relay's operational reliability. Since the stationary contact assembly 11 typically needs to be connected to an external load device, the stress generated during connection may affect the positional stability of the stationary contact assembly 11. Therefore, if the first magnetic element 13 is directly installed on either the energized or non-energized part of the stationary contact assembly 11, the accuracy of its position will also be affected, potentially increasing the magnetic resistance between it and the second magnetic element 14, reducing the magnetic attraction force, and affecting the short-circuit protection effect. Therefore, the fixed connection between the first magnetic element 13 and the insulating structure fixed relative to the stationary contact assembly 11 further ensures the stability and reliability of the magnetic attraction. Furthermore, the first magnetic conductor 13 is mounted on an insulating structure, which prevents the moving spring assembly 12 and the stationary contact assembly 11 from being connected through the first magnetic conductor 13 and the second magnetic conductor 14. This prevents the two magnetic conductors from overheating and increases the contact resistance between the moving spring assembly 12 and the stationary contact assembly 11, and avoids affecting the magnetic flux of the two magnetic conductors, thus ensuring magnetic attraction and contact reliability between the moving spring assembly 12 and the stationary contact assembly 11. In addition, in this embodiment, since magnetic attraction is used to enhance the contact attraction performance of the moving contact 122 and the stationary contact 111 against short circuits, it is not necessary to use more copper consumables to make a moving spring assembly with a larger structural volume, which also helps to reduce the amount and cost of copper consumables.

[0098] Optionally, such as Figure 2 As shown, in one embodiment, the electromagnetic relay of this application further includes a compression spring 16, which is a spring structure with elasticity, such as... Figure 2 As shown, one end of the compression spring 16 is fixedly connected to the moving spring body 121 by riveting or brazing, and its fixed position is the location of the moving contact 122 or between the fixed end 121a and the moving contact 122. The other end extends at an angle relative to the moving spring body 121 to the location of the magnetic circuit drive mechanism.

[0099] When the magnetic circuit drive mechanism applies a force to the movable end 121b, causing the moving contact 122 to make contact with the stationary contact 111 and conduct, the magnetic circuit drive mechanism also abuts against the other end of the compression spring 16, causing the compression spring 16 to undergo elastic deformation and generate pressure acting on the moving contact 122, so that the moving contact 122 and the stationary contact 111 make close and reliable contact.

[0100] In this connection method, the compression spring 16 is fixed at the location of the moving contact 122 or between the moving contact 122 and the fixed end 121a. This allows the compression spring 16 to tilt and form a greater contact force with the magnetic circuit drive mechanism when the part of the moving spring body 121 located between the moving contact 122 and the fixed end 121a deforms towards the first magnetic element 13 due to the magnetic attraction of the first magnetic element 13 and the second magnetic element 14. This further makes the contact between the moving contact 122 and the stationary contact 111 more reliable and improves the short-circuit resistance of the electromagnetic relay.

[0101] Specifically, in some embodiments, a mounting groove with a certain width is provided on the magnetic circuit drive mechanism. The mounting groove has a first abutment surface and a second abutment surface, and the movable end 121b of the moving spring body 121 and the other end of the compression spring 16 both extend into the mounting groove. When the moving contact 122 and the stationary contact 111 are separated, the movable end 121b abuts against the first abutment surface, and the other end of the compression spring 16 abuts against the second abutment surface. As the magnetic circuit drive mechanism gradually moves towards the stationary contact 111, the other end of the compression spring 16 is compressed by the second abutment surface, causing bending deformation and storing elastic potential energy. The elastic force of the compression spring 16 also acts on the movable end 121b through the moving spring body 121. When the moving contact 122 and the stationary contact 111 are in contact and connected, as the magnetic circuit drive mechanism continues to move toward the stationary contact 111, the moving end 121b separates from the first contact surface. At this time, the second contact surface continues to compress the compression spring 16, and the compression spring 16 continues to provide elastic force to the moving end 121b, so that the moving contact 122 and the stationary contact 111 are in close and reliable contact.

[0102] It should be noted that from the moment the moving contact 122 and the stationary contact 111 make contact and conduct, the moving end 121b separates from the first contact surface, until the magnetic circuit drive mechanism continues to move toward the stationary contact 111 to its end point of travel, this range is the overtravel operating range of the electromagnetic relay. In the overtravel operating range, the aforementioned compression spring 16 provides the elastic force required for the moving contact 122 and the stationary contact 111 to make tight contact, which helps to reduce the risk of the moving contact 122 and the stationary contact 111 being bounced away by the electric repulsive force.

[0103] In another embodiment, the fixed position of one end of the compression spring 16 and the moving spring body 121 can be the location of the moving contact 122 or between the moving contact 122 and the movable end 121b, and the other end of the compression spring 16 extends obliquely relative to the moving spring body 121 to the side of the moving contact 122 facing the fixed end 121a. In this case, the other end of the compression spring 16 is closer to the fixed end 121a. At this time, the driving end of the magnetic circuit drive mechanism located at the corresponding position can apply force to the compression spring 16 from the part close to the fixed end 121a, which can realize flexible adjustment of the position of the magnetic circuit drive mechanism.

[0104] Optionally, such as Figure 2 and Figure 3 As shown, in one embodiment, the aforementioned compression spring 16 in the electromagnetic relay of this application embodiment may include a first segment 161 and a second segment 162 that are bent relative to each other. One end of the first segment 161 is fixedly connected to the moving spring body 121, and the other end is fixedly connected to one end of the second segment 162. The other end of the second segment 162 extends toward the magnetic circuit drive mechanism and can abut against it.

[0105] Combination Figure 2 and Figure 3 As illustrated, the angle of inclination of the first segment 161 relative to the moving spring body 121 is greater than the angle of inclination of the second segment 162 relative to the moving spring body 121. This makes it easier for the distance between the end of the second segment 162 that abuts against the magnetic circuit drive mechanism and the movable end 121b to be the same as the distance between the two abutting surfaces in the assembly groove, thus meeting the requirements for overtravel operation of the electromagnetic relay. Moreover, when the electromagnetic relay overtravels, the movable end 121b of the moving spring body 121 moves away from the stationary contact 111. The larger inclination angle of the first segment 161 relative to the moving spring body 121 also provides a longer clearance space between the first segment 161 and the movable end 121b, reducing the risk of the movable end 121b of the moving spring body 121 touching the first segment 161. This can prevent the moving spring body 121 from acting in the opposite direction on the magnetic circuit drive mechanism due to the magnetic deformation of the first magnetic conductor 13 and the second magnetic conductor 14, which would cause the magnetic circuit drive mechanism to fail. In addition, compared with a compression spring structure that forms a large inclination directly with the moving spring body 121, the second segment 162 has less stress concentration at the connection position with the first segment 161, resulting in better fatigue resistance and a longer service life for the compression spring 16.

[0106] Optionally, in one embodiment, the various parts of the compression spring 16 in the electromagnetic relay of this application may have different elastic properties. For example, the elastic properties of the first segment 161 are weaker than those of the second segment. Specifically, when the compression spring 16 deforms, the first segment 161 may not deform relative to the moving spring body 121, while only the second segment 162 may bend relative to the moving spring body 121. It should be noted that the deformation of the first segment 161 relative to the moving spring body 121 does not mean that the first segment 161 does not deform at all, but rather that the deformation of the first segment 161 is less than the deformation of the second segment 162, and can be basically ignored.

[0107] Optionally, such as Figure 3As illustrated, in one embodiment, the length of the first segment 161 can be designed to be less than or equal to the length of the second segment 162, so that the second segment 162 is more flexible and easier to deform. Of course, in addition, the material hardness of the first segment 161 can be greater than that of the second segment 162, or a reinforcing rib structure can be designed in the first segment 161, and a gap can be opened in the second segment 162 along its length direction, all of which can make the second segment 162 easier to deform than the first segment 161.

[0108] Optionally, such as Figure 2 As shown, in one embodiment of the electromagnetic relay of this application, along the extension direction X of the moving spring body 121 (specifically, the extension direction X of the moving spring body 121 in this application refers to the extension direction of the moving spring body 121 in the closed state with the stationary contact 111), which is perpendicular or nearly perpendicular to the Y direction, the other end of the compression spring 16 is fixed between the second magnetic conductor 14 and the moving contact 122. At this time, the fixed part of the compression spring 16 and the moving spring body 121 is closer to the moving contact 122, and the length of the compression spring 16 is shorter, which can provide a larger clamping force to the moving contact 122, making the contact between the moving contact 122 and the stationary contact 111 more tight and reliable.

[0109] Optionally, such as Figure 5 As shown, in one embodiment of the electromagnetic relay of this application, a slit 1211 is further formed on the moving spring body 121. The slit 1211 removes part of the material from the moving spring body 121 to form a hollow portion. The extension direction of the slit 1211 is parallel or inclined to the extension direction of the moving spring body 121, and at least part of the slit 1211 extends to the part of the moving spring body 121 where the second magnetic conductor 14 is fixed. Thus, due to the presence of the slit 1211, part of the material of the moving spring body 121 is removed, which can weaken the constraint and restriction of the rigid second magnetic conductor 14 on the moving spring body 121, help improve the flexibility and elasticity of the moving spring body 121, reduce the force required to push the moving contact 122 to move, help reduce the voltage required for the magnetic circuit to form electromagnetic force, and reduce the energy consumption of the relay.

[0110] Optionally, such as Figure 4 As shown, in one embodiment of the electromagnetic relay of this application, when the moving contact 122 and the stationary contact 111 are in contact and closed, there is a gap between the first magnetic conductive element 13 and the second magnetic conductive element 14 which are arranged opposite to each other along the Y direction. This gap is the gap between the closest parts of the first magnetic conductive element 13 and the second magnetic conductive element 14. The existence of this gap can prevent the first magnetic conductive element 13 and the second magnetic conductive element 14 from directly contacting each other.

[0111] It should be noted that, in combination Figure 4As illustrated, when a short-circuit large current occurs in the relay, when the first magnetic element 13 and the second magnetic element 14 attract each other and approach each other, the moving spring body 121 will rotate around the position where the moving contact 122 and the stationary contact 111 are in contact. If the rotation range is too large, it may exert a downward force in the Y direction on the push rod 15 through the compression spring 16 and / or the movable end 121b of the moving spring body 121. This force may cause the magnetic holding state of the magnetic circuit drive mechanism to be destroyed, thereby causing the moving contact 122 and the stationary contact 111 to separate and disconnect.

[0112] Therefore, in this embodiment, the gap can be designed to be less than a preset value so that the first magnetic conductor 13 and the second magnetic conductor 14 are as close as possible, avoiding a large gap between them from providing a large stroke for the movement of the second magnetic conductor 14. This can prevent the moving end 121b on the left side of the moving contact 122 from rotating and acting in the opposite direction on the push rod 15, and can reduce the risk of the moving contact 122 and the stationary contact 111 separating and disconnecting. In addition, reducing the gap between the first magnetic conductor 13 and the second magnetic conductor 14 is also beneficial to reduce the magnetic resistance and increase the magnetic attraction between them, thereby ensuring good short-circuit resistance.

[0113] Optionally, such as Figure 4 As shown, in one embodiment of the electromagnetic relay of this application, the first dimension corresponding to the second magnetic conductive element 14 parallel to the extension direction X of the moving spring body 121 is its width, and the second dimension corresponding to the second magnetic conductive element 14 parallel to the width direction of the moving spring body 121, that is, the direction perpendicular to the plane of the paper, is its length or height. The first dimension is the dimension that coincides with the extension direction X of the moving spring body 121. If this dimension is too large, it is easy to cause too much overlap between the second magnetic conductive element 14 and the moving spring body 121, which will restrict the flexibility of the moving spring body 121. Therefore, in this embodiment of the application, the second dimension is designed to be larger than the first dimension, which can make the second magnetic conductive element 14 have a narrower sheet structure, which can reduce the restriction on the elasticity of the moving spring body 121. This also helps to reduce the electromagnetic force driving the moving contact 122 to move in the magnetic circuit part, and helps to reduce the voltage required for the magnetic circuit drive mechanism to form the electromagnetic force, which can reduce the energy consumption of the relay.

[0114] Optionally, in one embodiment, the electromagnetic relay of this application, such as Figure 6 As shown, along the width direction parallel to the moving spring body 121, the size of the first magnetic conductor 13 is larger than the size of the second magnetic conductor 14. Combined with... Figure 6As shown in the diagram, the dimension of the first magnetic conductor 13 along this direction is the height H1 along the Z direction as shown in the diagram, and the dimension of the second magnetic conductor 14 along this direction is the height H2 along the Z direction as shown in the diagram. The dimension H1 of the first magnetic conductor 13 along the Z direction is greater than the dimension H2 of the second magnetic conductor 14 along the Z direction. This can make full use of the depth space inside the relay along the Z direction, so that the first magnetic conductor 13 has a larger magnetic focusing volume, which can enhance the magnetic focusing effect and magnetic attraction force, and further improve the ability to resist electric repulsion.

[0115] Optionally, in one embodiment, the electromagnetic relay of this application, such as Figure 2 As shown, the electromagnetic relay also includes a housing 10, which is the outer shell of the relay and can be an injection-molded structure. Its interior has a receiving cavity for mounting and fixing the contact portion of the relay and the magnetic circuit drive mechanism. The moving spring assembly 12 also includes a moving spring lead-out piece 123. Part of the moving spring lead-out piece 123 is fixedly connected inside the housing 10. The fixed end 121a of the moving spring body 121 can be riveted and fixed to the moving spring lead-out piece 123. Another part of the moving spring lead-out piece 123 extends outward from inside the housing 10, protruding from the housing 10, forming a wiring pin on the outside of the relay. The wiring pin can be electrically connected to the load that the relay needs to control.

[0116] Combination Figure 2 , Figures 7 to 9 As illustrated, the movable spring lead-out piece 123 is provided with at least one limiting protrusion 1231. The limiting protrusion 1231 can be a protrusion structure directly stamped on the movable spring lead-out piece 123 or a protrusion structure welded and fixed on the movable spring lead-out piece 123. The protruding direction of the limiting protrusion 1231 intersects with the extending direction of the movable spring lead-out piece 123. Furthermore, at least one limiting groove 102 is provided inside the housing 10, and the limiting protrusion 1231 is embedded in the limiting groove 102. Through the snap-fit ​​limiting of the limiting protrusion 1231 and the limiting groove 102, relative movement between the smooth and flat movable spring lead-out piece 123 and the housing 10 along the extending direction of the movable spring lead-out piece 123 can be avoided, making the installation and fixation of the movable spring lead-out piece 123 more stable and reliable. For example, when assembling parts into a finished relay or installing the relay in an electrical device, improper operation or connection stress may cause relative movement between the moving spring lead 123 and the housing 10, resulting in a change in the installation position of the moving spring lead 123, affecting the relay's operation or even causing a malfunction. The limiting protrusion 1231 and limiting groove 102 of this embodiment can further improve the installation reliability of the moving spring lead 123, ensuring the positional stability of the moving spring body 121, thereby ensuring the accuracy of the position of the second magnetic conductor 14 of the moving contact, and contributing to improving the product quality of the relay.

[0117] Optionally, in one embodiment, the electromagnetic relay of this application, such as Figures 7 to 9As shown, the limiting groove 102 may include two limiting grooves at different positions: a first limiting groove 1021 and a second limiting groove 1022. Correspondingly, the limiting protrusion 1231 may include two limiting protrusions at different positions: a first limiting protrusion 12311 and a second limiting protrusion 12312. Figure 2 and Figure 9 As shown, the first limiting protrusion 12311 is embedded in the first limiting groove 1021, and the second limiting protrusion 12312 is embedded in the second limiting groove 1022. Exemplarily, the first limiting protrusion 12311 and the second limiting protrusion 12312 may be located on different surfaces on both sides of the spring lead-out sheet 123 of the sheet structure.

[0118] In this embodiment, the limiting protrusions 1231 and the limiting grooves 102 at two different locations are engaged and mutually redundant, which can further improve the installation reliability of the moving spring lead-out piece 123 and help improve the product quality of the relay.

[0119] Optionally, in one embodiment, the electromagnetic relay of this application, such as Figure 8 As shown, along the Y direction extending outward from the inside of the housing 10 along the spring lead-out piece 123, the first limiting protrusion 12311 and the second limiting protrusion 12312 are spaced apart and staggered. That is, along the X direction shown in the figure, the first limiting protrusion 12311 and the second limiting protrusion 12312 are not distributed along the same straight line. Therefore, the force of the two limiting protrusions 1231 can be prevented from being concentrated on the same part of the spring lead-out piece 123, which helps to ensure the strength of the spring lead-out piece 123.

[0120] Optionally, in one embodiment, in the electromagnetic relay of this application, at least one of the aforementioned first limiting protrusion 12311 and first limiting groove 1021, and second limiting protrusion 12312 and second limiting groove 1022, can be an interference fit, which can ensure that the assembly of the moving spring lead-out piece 123 and the housing 10 is relatively stable and reliable. It is understood that when both fits are interference fits, the installation and fixation of the moving spring lead-out piece 123 is more reliable and less prone to loosening or movement.

[0121] Optionally, in one embodiment, the electromagnetic relay of this application, such as Figure 2 and Figure 9 As shown, when the two limiting protrusions 1231 and the two limiting grooves 102 are spaced apart along the Y direction as shown in the figure, one limiting groove 102 is closer to the inside of the housing 10, and the other limiting groove 102 is farther from the inside of the housing 10. Correspondingly, one limiting protrusion 1231 is closer to the moving spring body 121, and the other limiting protrusion 1231 is farther from the moving spring body 121.

[0122] For example, along the extending direction Y of the movable spring lead-out piece 123, the first limiting protrusion 12311 is farther from the movable spring body 121 than the second limiting protrusion 12312. The fit between the first limiting protrusion 12311 and the first limiting groove 1021 can be designed as an interference fit, and the fit between the second limiting protrusion 12312 and the second limiting groove 1022 can be designed as a clearance fit.

[0123] This differentiated design of the two mating relationships allows for a tighter interference fit on the outermost first limiting protrusion 12311, which is further away from the moving spring body 121. When the exposed portion of the moving spring lead 123 is pulled, it is less likely to cause displacement of the inner moving spring lead 123, thus ensuring the positional stability of the moving contact 122 and the magnetic gap between the first magnetic conductor 13 and the second magnetic conductor 14. For the innermost second limiting protrusion 12312, designing it with a clearance fit to the second limiting groove 1022 helps avoid over-positioning, thereby facilitating installation, reducing processing requirements and difficulty, and lowering relay costs.

[0124] Optionally, in one embodiment, the electromagnetic relay of this application, such as Figure 2 As shown, the stationary contact assembly 11 also includes a stationary contact body 112, which is installed inside the housing 10 and remains stationary. For example, the stationary contact body 112 can be a sheet-like structure made of copper sheet or other conductors. A stationary contact 111 can be riveted to one end of the stationary contact body 112. The end of the stationary contact body 112 without the stationary contact 111 being installed can extend outward from inside the housing 10 to form another wiring pin, which can be electrically connected to the load that the relay needs to control.

[0125] Combination Figure 10 As illustrated, in this embodiment of the application, a support boss 103 is provided on the housing 10 at the part extending outward from the stationary contact body 112. The part of the stationary contact body 112 exposed outside the housing 10 abuts against the support boss 103. The support boss 103 can support and fix the stationary contact body 112 outside the housing 10, which can prevent the stationary contact body 112 from bending and pulling under stress, thus preventing the stationary contact point 111 from being fixed in place.

[0126] Optionally, in one embodiment, the electromagnetic relay of this application, such as Figure 10As shown, the support boss 103 includes a support portion 1031 and a stop portion 1032. The stop portion 1032 is distributed and connected to both sides of the support portion 1031 along the X direction shown in the figure. The stop portion 1032 protrudes from the surface of the support portion 1031 and forms a blocking structure on the side of the support portion 1031. The three together form a concave third limiting groove. When the stationary contact body 112 is embedded in the third limiting groove and abuts against the support portion 1031, the two sides of the stationary contact body 112 in the width direction are restricted by the stop portion 1032. The stationary contact body 112 is difficult to rotate or translate on the support portion 1031. At this time, the stationary contact body 112 is also more reliably installed and fixed, thereby ensuring the stability of the position of the stationary contact 111.

[0127] Optionally, in one embodiment, the electromagnetic relay of this application, such as Figure 10 and Figure 11 As shown, in addition to using the stop portion 1032 to constrain the movement of the stationary contact body 112, to further ensure that the stationary contact body 112 remains relatively stationary with respect to the housing 10, the support portion 1031 is provided with a first positioning structure 10311, and the stationary contact body 112 is provided with a second positioning structure 1121. The first positioning structure 10311 and the second positioning structure 1121 cooperate with each other to prevent the stationary contact body 112 from translating relative to the housing 10 along the extension direction Y of the stationary contact body 112. Thus, in this relay, the movement of the stationary contact body 112 relative to the housing 10 in both the X and Y directions can be restricted, and its installation position is more stable and reliable.

[0128] For example, one of the first positioning structure 10311 and the second positioning structure 1121 described above may be a positioning post protruding from the positioning post (e.g., a positioning post protruding from the surface of the support portion 1031), and the other may be a positioning hole (e.g., a through hole penetrating the two opposing surfaces of the sheet-like stationary contact body 112). By inserting the positioning post into the positioning hole, the translation of the stationary contact body 112 relative to the support portion 1031 can be restricted, and the stationary contact body 112 can be prevented from moving along the Y direction shown in the figure.

[0129] Optionally, in one embodiment, the electromagnetic relay of this application, such as Figure 10As shown, the support portion 1031 includes a first surface 1031a and a second surface 1031b arranged opposite to each other. Along the Z direction shown in the figure, the first surface 1031a is located above and is perpendicular to the side wall on the housing 10 from which the stationary contact body 112 extends. After the stationary contact body 112 extends horizontally from inside the housing 10, a portion of it rests on and abuts against the first surface 1031a. The second surface 1031b, located below, intersects the side wall on the housing 10 from which the stationary contact body 112 extends at an obtuse angle. The inclined portion below the support portion 1031 forms a support rib structure, which can further improve the structural rigidity of the support portion 1031. It should be noted that, in this embodiment, the side wall perpendicular to the first surface 1031a and inclined to the second surface 1031b refers to a side wall extending from the stationary contact body 112.

[0130] Optionally, in one embodiment, the electromagnetic relay of this application embodiment also satisfies the following characteristics for the stationary contact body 112 and the moving spring lead-out piece 123 mentioned in the foregoing embodiments.

[0131] like Figure 11 As illustrated, the stationary contact body 112 includes a first fixing portion 112a and a first load connecting portion 112b, both integrally formed and sheet-like. The stationary contact 111 is riveted or brazed to the first fixing portion 112a. Both the first fixing portion 112a and the stationary contact 111 are located inside the housing 10. The first load connecting portion 112b extends outward from inside the housing 10 and protrudes from the housing 10. The first load connecting portion 112b can be used for electrical connection with the load that the relay needs to control. Furthermore, the first load connecting portion 112b is connected to one side of the first fixing portion 111a along the width direction Z of the moving spring body 121 and is perpendicular to the first fixing portion 111a. Figure 10 As illustrated, the stationary contact body 112 can be an L-shaped part formed by stamping and bending a metal sheet, one part of which is the first fixing part 112a, and the other part is the first load connecting part 112b. Combined with... Figure 1 and Figure 2 As shown in the diagram, after the stationary contact body 112 is assembled with the housing 10, the thickness direction of the first load connection part 111b is parallel to the width direction of the moving spring body 121, and both are perpendicular to the plane of the paper.

[0132] like Figure 7As illustrated, the movable spring lead-out piece 123 includes a second fixing part 123a and a second load connecting part 123b, both integrally formed and sheet-like. A fixing end 121a is riveted to the second fixing part 123a. Both the second fixing part 123a and the fixing end 121a are located inside the housing 10. The second load connecting part 123b extends outward from inside the housing 10 and protrudes from the housing 10. The second load connecting part 123b can be used for electrical connection with the load that the relay needs to control. The second load connecting part 123b is connected to the side of the second fixing part 123a away from the movable end 121b and is perpendicular to the second fixing part 123a. In this case, the aforementioned limiting protrusion 123 can be provided on the second load connecting part 123b. Figure 7 As illustrated, the spring lead-out piece 123 can be an L-shaped part formed by stamping and bending a metal sheet, one part of which is the second fixing part 123a, and the other part is the second load connecting part 123b. Combined with... Figure 1 and Figure 2 As shown in the diagram, after the moving spring lead-out piece 123 is assembled with the housing 10, the thickness direction X of the second load connection part 123b is parallel to the width direction of the moving spring body 121.

[0133] Based on the above diagram, when the moving contact 122 and the stationary contact 111 are in contact and conducting, the direction of the current is either "stationary contact body 112 - stationary contact 111 - moving contact 122 - moving spring body 121 - moving spring lead-out piece 123" or the opposite direction. At this time, a magnetic field with the same magnetic flux direction can be generated in the U-shaped space formed by the stationary contact body 112, the moving spring body 121 and the moving spring lead-out piece 123. The magnetic field strength in this area is superimposed, which can make the first magnetic conductor 13 located therein have a stronger magnetic attraction effect.

[0134] In addition, combined Figure 2 , Figure 7 and Figure 11 As illustrated, the structure and extension direction of the stationary contact body 112 and the moving spring lead-out piece 123 in this embodiment of the application avoid the reciprocating bending of these two parts inside the housing 10, which can avoid occupying too much space inside the housing 10 and is conducive to the miniaturization of the relay.

[0135] Optionally, such as Figure 1 and Figure 2 As shown in the embodiment of this application, the stationary contact body 112 and the moving spring lead-out piece 123 extend from the same side wall of the housing 10. For example, the first load connection part 111b and the second load connection part 123b extend from the same side wall. This electromagnetic relay concentrates the parts used for connecting the load on the same side wall, which is beneficial for miniaturizing the relay and also improves the convenience of wiring.

[0136] Optionally, in one embodiment, the relay of this application further includes a cover, and the housing 10 has an opening; the stationary contact assembly 11, the moving spring assembly 12, the first magnetic conductor 13, and the second magnetic conductor 14 can be inserted into the housing 10 through the opening. The cover can also be made of insulating material and can be fixed to the housing 10 by a snap-fit ​​structure or bolts to block the opening of the housing 10, thereby sealing the inside of the housing 10 and providing dust and water protection. In addition, the cover also cooperates with the housing 10 in the Z direction shown in the figure to constrain and restrict the stationary contact body 112 and the moving spring lead-out piece 123 installed inside the housing 10, so that they are securely fixed in the Z direction (i.e., parallel to the width direction of the moving spring body 121). Optionally, as shown in the figure... Figure 4 As shown, in one embodiment, an arched bend 121c is provided between the movable end 121b and the fixed end 121a of the moving spring body 121. The arched bend 121c can improve the flexibility and elasticity of the moving spring body 121, and is beneficial to improving its current carrying capacity, current-carrying performance, and determining the rotation fulcrum of the moving spring body 121. When the movable end 121b is driven by the pushing component, the movable end 121b of the moving spring body 121 swings in an arc trajectory with the bend 121c as the rotation fulcrum. At this time, the second magnetic conductor 14 can be fixed between the bend 121c and the moving contact 122, so that the second magnetic conductor 14 is closer to the moving contact 122 and the stationary contact 111. This can prevent the magnetic attraction between the first magnetic conductor 13 and the second magnetic conductor 14 from unreliably improving the short-circuit withstand capability due to the presence of the bend 121c between the second magnetic conductor 14 and the moving contact 122.

[0137] Optionally, such as Figure 4 As shown, in one embodiment, in the contact direction Y between the moving contact 122 and the stationary contact 111, the portion of the first magnetic conductor 13 used for magnetic conduction is closer to the moving spring body 121 than the stationary contact 111. This reduces the magnetic gap between the first magnetic conductor 13 and the second magnetic conductor 14, which helps to improve the magnetic attraction force.

[0138] Optionally, in one embodiment, the moving spring body 121 may include multiple moving spring branches arranged in parallel. Each moving spring branch may be a flexible metal spring structure, and the fixed ends of the multiple moving spring branches may be connected as one unit. The movable end of each moving spring branch is provided with a moving contact 122. By designing the moving spring body 121 into this structure of multiple branches in parallel, the current on the moving spring body 121 can be shunted. For a single moving spring branch, the current is reduced, and its electrodynamic repulsion is also reduced.

[0139] Based on this, in order to ensure that each moving spring branch is not bounced away by the electric repulsion force, each moving spring branch is fixed with a second magnetic conductor 14 for the part used to carry current. Each second magnetic conductor 14 corresponds to a first magnetic conductor 13 or the same first magnetic conductor 13. The second magnetic conductor 14 and the first magnetic conductor 13 on the other side of the moving spring branch form a closed magnetic circuit, which can improve the performance of the corresponding moving spring branch in resisting the electric repulsion force.

[0140] Optionally, such as Figure 10 As shown, the housing 10 has a snap-fit ​​groove 101 on its open side. The first magnetic conductive element 13 can be installed and embedded into the snap-fit ​​groove 101 from this open side. Then, after the cover is fixed to the housing 10, the cover can further constrain and fix the first magnetic conductive element 13 in the Z direction. Figure 2 As shown in the diagram, along the X direction, the first magnetic conductive element 13 has protruding structures on both sides. When the first magnetic conductive element 13 is embedded in the snap-fit ​​groove 101, the protruding structures cooperate with the notches in the snap-fit ​​groove 101, so that the first magnetic conductive element 13 is more stably installed and fixed and is not easy to loosen.

[0141] Optionally, such as Figure 1 and Figure 2 As shown, the magnetic circuit drive mechanism in the relay of this application embodiment includes a magnetic circuit part and a pusher 15. The magnetic circuit part has a magnetic holding function and may include an armature assembly 17 and a coil assembly 18.

[0142] In addition, combined Figure 12 and Figure 13 As illustrated, one end of the pusher 15 is connected to the armature assembly 17, and the other end is provided with an assembly groove 151; the two opposing surfaces within the assembly groove 151 are the aforementioned first abutment surface 151a and second abutment surface 151b. The movable end 121b and the end of the compression spring 16 are assembled within the assembly groove 151 and can abut against the two opposing surfaces within the assembly groove 151, respectively. For details, please refer to the description of the magnetic circuit drive mechanism in the previous embodiment, which will not be repeated here.

[0143] When the coil assembly 18 is energized, it can drive the armature assembly 17 to rotate. The armature assembly 17 then drives the pusher 15 to move along the Y direction shown in the figure. The pusher 15 can drive the movable end 121b to move, realizing the contact or separation of the moving contact 122 and the stationary contact 111. Furthermore, it is understood that when the electromagnetic relay of this embodiment includes the housing 10 of the aforementioned embodiment, both the armature assembly 17 and the coil assembly 18 are disposed within the housing 10. The armature assembly 17 is rotatably connected to the housing 10, and the coil assembly 18 is fixedly connected to the housing 10.

[0144] Optionally, in one embodiment of this application, the first magnetic conductive element 13 is a flat, straight plate, and the second magnetic conductive element 14 is a U-shaped element, with the opening side of the second magnetic conductive element 14 facing the first magnetic conductive element 13. This shape configuration of the two magnetic conductive elements provides a larger magnetic focusing area, which is beneficial for improving the magnetic focusing effect and magnetic attraction.

[0145] In addition, this application embodiment also provides an electrical device in which the aforementioned electromagnetic relay can be used. Based on the characteristics of electromagnetic relays, such as strong short-circuit resistance and low material cost, the working reliability of the electrical device can be improved and the cost of the electrical device can be reduced.

[0146] It should be noted that the electrical devices in the embodiments of this application include, but are not limited to, electricity metering devices such as electricity meters, and may also include other electrical devices such as automobiles, battery packs, energy storage cabinets, and household appliances. These will not be described in detail in the embodiments of this application.

[0147] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0148] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. An electromagnetic relay, characterized in that, The electromagnetic relay includes: A static contact assembly (11) includes a static contact (111). A movable spring assembly (12) includes a movable spring body (121) and a movable contact (122) disposed on the movable spring body (121). One end of the movable spring body (121) is a fixed end (121a) that remains relatively stationary with respect to the stationary contact assembly (11), and the other end is a movable end (121b) that can swing relative to the stationary contact assembly (11). The movable contact (122) is disposed close to the movable end (121b), and the movable contact (122) can contact or separate from the stationary contact (111). The first magnetic conductive element (13) is fixedly connected to an insulating structure fixed relative to the stationary contact assembly (11) and is located on the side of the moving spring body (121) facing the stationary contact (111). The second magnetic conductor (14) is fixed to the side of the moving spring body (121) away from the stationary contact (111) and located between the moving contact (122) and the fixed end (121a). The second magnetic conductor (14) is arranged opposite to the first magnetic conductor (13).

2. The electromagnetic relay according to claim 1, characterized in that, The electromagnetic relay also includes: Magnetic circuit drive mechanism; A compression spring (16) is fixed at one end to the moving spring body (121) and fixed at the location of the moving contact (122) or between the fixed end (121a) and the moving contact (122). Its other end extends obliquely relative to the moving spring body (121) and can be deformed by the magnetic circuit drive mechanism to provide contact pressure to the moving contact (122).

3. The electromagnetic relay according to claim 2, characterized in that, The compression spring (16) includes a first segment (161) and a second segment (162). The two ends of the first segment (161) are fixed to one end of the moving spring body (121) and one end of the second segment (162), respectively. The other end of the second segment (162) is used for the magnetic circuit drive mechanism to abut. The angle at which the first segment (161) is tilted relative to the moving spring body (121) is greater than the angle at which the second segment (162) is tilted relative to the moving spring body (121).

4. The electromagnetic relay according to claim 3, characterized in that, When the compression spring (16) deforms, the first segment (161) does not deform relative to the moving spring body (121), while the second segment (162) deforms relative to the moving spring body (121).

5. The electromagnetic relay according to claim 4, characterized in that, The length of the first segment (161) is less than or equal to the length of the second segment (162).

6. The electromagnetic relay according to claim 2, characterized in that, One end of the compression spring (16) is fixed between the second magnetic conductor (14) and the moving contact (122).

7. The electromagnetic relay according to claim 1, characterized in that, The electromagnetic relay also includes: Magnetic circuit drive mechanism; A compression spring (16) has one end fixedly connected to the moving spring body (121) and fixed at the location of the moving contact (122) or between the moving contact (122) and the movable end (121b). Its other end extends obliquely relative to the moving spring body (121) to the side of the moving contact (122) facing the fixed end (121a), and can be deformed by the magnetic circuit drive mechanism to provide contact pressure to the moving contact (122).

8. The electromagnetic relay according to claim 2 or 7, characterized in that, The moving spring body (121) is provided with a gap (1211), the extension direction of the gap (1211) is parallel or inclined to the extension direction of the moving spring body (121), and at least part of the gap (1211) extends to the part of the moving spring body (121) that fixes the second magnetic conductor (14).

9. The electromagnetic relay according to claim 1, characterized in that, When the moving contact (122) and the stationary contact (111) are in contact and closed, the gap between the first magnetic conductor (13) and the second magnetic conductor (14) is less than a preset value.

10. The electromagnetic relay according to claim 1, characterized in that, Parallel to the extending direction of the moving spring body (121), the second magnetic conductor (14) has a first dimension; Parallel to the width direction of the moving spring body (121), the second magnetic conductor (14) has a second dimension; The second dimension is larger than the first dimension.

11. The electromagnetic relay according to claim 1, characterized in that, Parallel to the width direction of the moving spring body (121), the size of the first magnetic conductor (13) is larger than the size of the second magnetic conductor (14).

12. The electromagnetic relay according to claim 1, characterized in that, The electromagnetic relay also includes a housing (10), and the moving spring assembly (12) also includes a moving spring lead-out piece (123); part of the moving spring lead-out piece (123) is fixed inside the housing (10) and is fixed together with and electrically connected to the fixed end (121a), and another part of the moving spring lead-out piece (123) extends outward from inside the housing (10) and protrudes from the housing (10). The moving spring lead-out piece (123) is provided with at least one limiting protrusion (1231), the protrusion direction of the limiting protrusion (1231) intersects with the extension direction of the moving spring lead-out piece (123), and at least one limiting groove (102) is provided in the housing (10), and the limiting protrusion (1231) is embedded in the limiting groove (102).

13. The electromagnetic relay according to claim 12, characterized in that, The limiting groove (102) includes a first limiting groove (1021) and a second limiting groove (1022), and the limiting protrusion (1231) includes a first limiting protrusion (12311) and a second limiting protrusion (12312). The first limiting protrusion (12311) and the second limiting protrusion (12312) are disposed at different positions on the moving spring lead-out piece (123); The first limiting protrusion (12311) is embedded in the first limiting groove (1021), and the second limiting protrusion (12312) is embedded in the second limiting groove (1022).

14. The electromagnetic relay according to claim 13, characterized in that, Along the direction in which the spring lead-out piece (123) extends outward from inside the housing (10), the first limiting protrusion (12311) and the second limiting protrusion (12312) are spaced out and staggered.

15. The electromagnetic relay according to claim 14, characterized in that, The first limiting protrusion (12311) is in an interference fit with the first limiting groove (1021); and / or, the second limiting protrusion (12312) is in an interference fit with the second limiting groove (1022).

16. The electromagnetic relay according to claim 15, characterized in that, Along the extending direction of the spring lead-out piece (123), the first limiting protrusion (12311) is farther from the spring body (121) than the second limiting protrusion (12312); The first limiting protrusion (12311) is interference-fitted with the first limiting groove (1021), and the second limiting protrusion (12312) is clearance-fitted with the second limiting groove (1022).

17. The electromagnetic relay according to claim 12, characterized in that, The static contact assembly (11) further includes a static contact body (112), the static contact (111) is fixed to the static contact body (112), a portion of the static contact body (112) is fixed inside the housing (10) and used for the static contact (111) to be fixed, and another portion extends outward from inside the housing (10) and protrudes from the housing (10). A support boss (103) is provided on the housing (10) at the part where the static contact body (112) extends outward, and the part of the static contact body (112) exposed outside the housing (10) abuts against the support boss (103).

18. The electromagnetic relay according to claim 17, characterized in that, The support boss (103) includes a support part (1031) and a stop part (1032) connected to opposite sides of the support part (1031). The stop part (1032) and the support part (1031) are connected to form a third limiting groove. The static contact body (112) is embedded in the third limiting groove and abuts against the support part (1031).

19. The electromagnetic relay according to claim 18, characterized in that, The support part (1031) is provided with a first positioning structure (10311), and the static contact body (112) is provided with a second positioning structure (1121). The first positioning structure (10311) and the second positioning structure (1121) cooperate with each other to restrict the static contact body (112) from translating relative to the housing (10) along the extension direction of the static contact body (112).

20. The electromagnetic relay according to claim 19, characterized in that, In the first positioning structure (10311) and the second positioning structure (1121), one is a positioning post and the other is a positioning hole, with the positioning post passing through the positioning hole.

21. The electromagnetic relay according to claim 18, characterized in that, The support portion (1031) includes a first surface (1031a) and a second surface (1031b) arranged opposite to each other. The first surface (1031a) is perpendicular to the side wall of the housing (10) from which the static contact body (112) extends. The second surface (1031b) intersects the side wall of the housing (10) from which the static contact body (112) extends at an obtuse angle. The static contact body (112) abuts against the first surface (1031a).

22. The electromagnetic relay according to claim 17, characterized in that, The stationary contact body (112) includes a first fixing part (111a) and a first load connecting part (111b) that are integrally formed and are both sheet-like. The stationary contact (111) is fixed to the first fixing part (111a). The first load connecting part (111b) extends outward from the housing (10) and protrudes from the housing (10). The first load connecting part (111b) is connected to one side of the first fixing part (111a) along the width direction of the moving spring body (121) and is perpendicular to the first fixing part (111a). The thickness direction of the first load connecting part (111b) is parallel to the width direction of the moving spring body (121).

23. The electromagnetic relay according to claim 12, characterized in that, The movable spring lead-out piece (123) includes a second fixing part (123a) and a second load connecting part (123b) that are integrally connected and are both sheet-shaped. The fixing end (121a) is riveted and fixed to the second fixing part (123a). The second load connecting part (123b) extends outward from the housing (10) and protrudes from the housing (10). The second load connecting part (123b) is connected to the side of the second fixing part (123a) away from the movable end (121b) and is perpendicular to the second fixing part (123a). The thickness direction of the second load connecting part (123b) is perpendicular to the width direction of the movable spring body (121).

24. The electromagnetic relay according to claim 17, characterized in that, The stationary contact body (112) and the moving spring lead-out piece (123) extend from the same side wall of the housing (10).

25. The electromagnetic relay according to claim 17, characterized in that, It also includes a cover, the housing (10) having an opening; the static contact assembly (11), the moving spring assembly (12), the first magnetic conductor (13) and the second magnetic conductor (14) can be inserted into the housing (10) through the opening; the cover is fixedly connected to the opening of the housing (10) and cooperates with the housing (10) to restrict the displacement of the static contact body (112) and the moving spring lead-out piece (123) along the width direction of the moving spring body (121).

26. The electromagnetic relay according to claim 1, characterized in that, An arched bend (121c) is provided between the movable end (121b) and the fixed end (121a), and the second magnetic conductor (14) is fixed between the bend (121c) and the moving contact (122).

27. The electromagnetic relay according to claim 1, characterized in that, In the contact direction between the moving contact (122) and the stationary contact (111), the portion of the first magnetic conductor (13) used for magnetic conduction is closer to the moving spring body (121) than the stationary contact (111).

28. The electromagnetic relay according to claim 1, characterized in that, The moving spring body (121) includes multiple moving spring branches arranged in parallel, and each moving spring branch is provided with the moving contact (122). Each of the moving spring branches is fixed with a second magnetic conductor (14) for the portion for carrying current. Each second magnetic conductor (14) corresponds to a first magnetic conductor (13) or the same first magnetic conductor (13).

29. The electromagnetic relay according to claim 12, characterized in that, The housing (10) is provided with a snap-fit ​​groove (101), and the first magnetic conductive element (13) is embedded in the snap-fit ​​groove (101).

30. The electromagnetic relay according to claim 2, characterized in that, The magnetic circuit drive mechanism includes a magnetic circuit part and a pusher (15). The magnetic circuit part has a magnetic holding function and includes an armature assembly (17) and a coil assembly (18). One end of the pusher (15) is connected to the armature assembly (17), and the other end is provided with an assembly groove (151); the movable end (121b) and the end of the compression spring (16) are assembled in the assembly groove (151). The coil assembly (18) drives the armature assembly (17) to rotate by excitation, and the armature assembly (17) drives the movable end (121b) to move by the pusher (15).

31. The electromagnetic relay according to claim 1, characterized in that, The first magnetic conductive element (13) is a flat plate in the shape of a straight line, and the second magnetic conductive element (14) is a U-shaped element with the opening side of the second magnetic conductive element (14) facing the first magnetic conductive element (13).

32. An electrical appliance, characterized in that, The electrical device includes the electromagnetic relay as described in any one of claims 1 to 31.

33. The electrical appliance according to claim 32, characterized in that, The electrical device includes an electricity meter.

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