Electromagnetic relay

Abstract

The invention discloses an electromagnetic relay which 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 invention has the advantages of excellent short-circuit resistance, low consumption of copper consumables and low cost.

Description

Technical Field

[0001] The present application belongs to the technical field of relays, and specifically relates to an electromagnetic relay. Background Art

[0002] In the electrical engineering industry, relays are widely used as a control device. They have a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and are usually used in automatic control circuits. Relays are actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, they play the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] A magnetic latching relay is a type of relay. In existing magnetic latching relays, when a fault occurs during operation and the relay is affected by a short-circuit current, a large electric repulsion force will be formed between the moving contact and the stationary contact. Under the action of the electric repulsion force, the moving contact and the stationary contact will be forced to bounce apart and form an extremely strong fault arc, which will cause damage to the relay and, in severe cases, may cause the relay to explode.

[0004] Therefore, it is necessary to overcome the electric repulsion between the moving contact and the static contact to improve the working reliability and product quality of the magnetic latching relay. In order to solve this problem, in the existing technology, in the moving spring assembly of the magnetic latching relay, the moving spring lead-out piece is usually connected to the side of the moving spring body away from the moving contact, and the current direction of the moving spring lead-out piece is opposite to the current direction of the moving spring body. In this way, the moving spring body will be affected by the Ampere force of the magnetic field formed by the moving spring lead-out piece, and the contact pressure between the moving contact and the static contact will be increased. However, in this structure, the moving spring assembly occupies a large volume and the length of the moving spring lead-out piece is relatively large. Therefore, the moving spring assembly consumes more materials and has a high cost. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide an electromagnetic relay that can solve the problem of large amount of consumables and high cost of the dynamic spring assembly in the existing relay in order to ensure working reliability.

[0006] In order to solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides an electromagnetic relay, the electromagnetic relay comprising:

[0008] A static contact assembly, the static contact assembly comprising a static contact;

[0009] A movable spring assembly, the movable spring assembly comprising 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 for the static contact assembly to remain relatively still, and the other end is a movable end that can swing relative to the static contact assembly; wherein the movable contact is arranged close to the movable end, and the movable contact can contact or separate from the static contact;

[0010] A first magnetic conductive member, the first magnetic conductive member is fixedly connected to an insulating structure fixed relative to the static contact assembly and is located on a side of the movable spring body facing the static contact point;

[0011] The second magnetic conductive member is fixedly connected to a side of the movable spring body away from the static contact and is located between the movable contact and the fixed end. The second magnetic conductive member is arranged opposite to the first magnetic conductive member.

[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 movable spring body and fixed at the position of the movable contact or between the fixed end and the movable contact, and the other end of which extends obliquely relative to the movable spring body and can be deformed by abutment by the magnetic circuit driving mechanism and provide contact pressure to the movable contact.

[0015] Optionally, the compression spring includes a first section and a second section, two ends of the first section are respectively fixedly connected to the movable spring body and one end of the second section, and the other end of the second section is used to abut the magnetic circuit driving mechanism; the inclination angle of the first section relative to the movable spring body is greater than the inclination angle of the second section relative to the movable spring body.

[0016] Optionally, when the compression spring is deformed, the first section does not deform relative to the movable spring body, and the second section deforms relative to the movable 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 conductive member 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 movable spring body and fixed at the position of the movable contact or between the movable contact and the movable end, and the other end of which is inclined relative to the movable spring body and extends to the side of the movable contact toward the fixed end, and can be deformed by abutment by a magnetic circuit driving mechanism and provide contact pressure to the movable contact.

[0022] Optionally, the movable spring body is provided with a gap, the extension direction of the gap is parallel to or inclined with the extension direction of the movable spring body, and at least part of the gap extends to the position of the movable spring body where the second magnetic conductive member is fixed.

[0023] Optionally, when the moving contact and the static contact are in contact and closed, the gap between the first magnetic conductive member and the second magnetic conductive member is smaller than a preset value.

[0024] Optionally, parallel to the extension direction of the movable spring body, the second magnetic conductive member has a first size;

[0025] The second magnetic conductive member has a second size parallel to the width direction of the dynamic spring body;

[0026] The second size is greater than the first size.

[0027] Optionally, parallel to the width direction of the dynamic spring body, the size of the first magnetic conductive component is greater than the size of the second magnetic conductive component.

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

[0029] The movable spring lead-out piece is provided with at least one limiting protrusion, the protruding direction of the limiting protrusion intersects with the extending direction of the movable spring lead-out piece, and at least one limiting groove is provided in the shell, and the limiting protrusion is 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 arranged at different positions of the movable 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, along the direction in which the movable spring lead-out piece extends from the inside of the housing to the outside, the first limiting protrusion and the second limiting protrusion are arranged in an offset manner.

[0034] Optionally, the first limiting protrusion and the first limiting groove are interference fit; and / or the second limiting protrusion and the second limiting groove are interference fit.

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

[0036] The first limiting protrusion and the first limiting groove are interference fit, and the second limiting protrusion and the second limiting groove are clearance fit.

[0037] Optionally, the static contact assembly further comprises a static contact body, the static contact point is fixedly connected to the static contact body, a portion of the static contact body is fixed in the housing and is fixedly connected to the static contact point, and another portion thereof extends outward from the housing to be exposed from the housing;

[0038] A supporting boss is provided on the housing at a portion of the stationary contact body extending outward, and a portion of the stationary contact body exposed from the housing abuts against the supporting boss.

[0039] Optionally, the supporting boss includes a supporting portion and a stop portion connected to opposite sides of the supporting portion, the stop portion and the supporting 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 supporting 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, and the first positioning structure and the second positioning structure cooperate with each other to limit the translation of the stationary contact body 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 column, and the other is a positioning hole, and the positioning column is inserted into the positioning hole.

[0042] Optionally, the supporting portion includes a first surface and a second surface arranged in back to back relation, the first surface being perpendicular to a side wall of the shell from which the static contact body extends, and the second surface being inclined and intersecting at an obtuse angle with the side wall of the shell from which the static contact body extends, wherein the static contact body abuts against the first surface.

[0043] Optionally, the static contact body includes a first fixed part and a first load connecting part that are connected as one body and are both in sheet shape, the static contact is fixed to the first fixed part, and the first load connecting part extends outward from the inside of the shell and is exposed from the shell, wherein the first load connecting part is connected to one side of the first fixed part along the width direction of the movable spring body and is perpendicular to the first fixed part, and the thickness direction of the first load connecting part is parallel to the width direction of the movable spring body.

[0044] Optionally, the movable spring lead-out piece includes a second fixed portion and a second load connecting portion that are integrally connected and both are sheet-shaped, the fixed end is riveted and fixed to the second fixed portion, and the second load connecting portion extends outward from the inside of the shell and is exposed from the shell, wherein the second load connecting portion is connected to a side of the second fixed portion away from the movable end and is perpendicular to the second fixed portion, and the thickness direction of the second load connecting portion is perpendicular to the width direction of the movable spring body.

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

[0046] Optionally, the electromagnetic relay also includes a cover body, and the shell has an opening; the static contact assembly, the dynamic spring assembly, the first magnetic conductive part and the second magnetic conductive part can be loaded into the shell from the opening; the cover body is fixedly connected to the opening position of the shell, and cooperates with the shell to limit the displacement of the static contact body and the dynamic spring lead-out piece along the width direction of the dynamic spring body.

[0047] Optionally, an arched curved portion is provided between the movable end and the fixed end, and the second magnetic conductive member is fixed between the curved portion and the movable contact.

[0048] Optionally, in the contact direction between the moving contact and the static contact, the portion of the first magnetic conductive member used for conducting magnetism is closer to the moving spring body than to the static contact.

[0049] Optionally, the dynamic spring body includes a plurality of dynamic spring branches arranged in parallel, and each of the dynamic spring branches is provided with the dynamic contact;

[0050] The second magnetic conductive member is fixed to the portion of each of the movable spring branches used for current flow, and each of the second magnetic conductive members corresponds to one of the first magnetic conductive members or corresponds to the same first magnetic conductive member.

[0051] Optionally, the shell is provided with a clamping groove, and the first magnetic conductive component is embedded in the clamping groove.

[0052] Optionally, the magnetic circuit driving mechanism includes a magnetic circuit part and a pusher, and 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 a mounting groove; the movable end and the end of the compression spring are mounted in the mounting 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 pushing member.

[0055] In a second aspect, an embodiment of the present application further discloses an electrical device, which includes any one of the electromagnetic relays described in the first aspect.

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

[0057] In the embodiment of the present application, by utilizing the magnetic attraction of the first magnetic conductive member and the second magnetic conductive member, when a large short-circuit current occurs, the moving contact and the static contact can resist the electric repulsion caused by the large short-circuit current, thereby maintaining a closed conduction state, which can improve the working reliability of the relay. Since the static contact assembly usually needs to be connected to an external load device, the stress generated during the connection may cause the position stability of the static contact assembly to be affected. Therefore, if the first magnetic conductive member is directly installed on the energized part or the non-energized part of the static contact assembly, the accuracy of the position of the first magnetic conductive member will also be affected, which may increase the magnetic resistance between the second magnetic conductive member, reduce the magnetic attraction force, and affect the anti-short circuit effect. Therefore, the fixed connection between the first magnetic conductive member and the insulating structure fixed relative to the static contact assembly further ensures the stability and reliability of the magnetic attraction. Furthermore, the first magnetic conductive member is installed on the insulating structure, which can prevent the dynamic spring assembly and the static contact assembly from being connected through the first magnetic conductive member and the second magnetic conductive member, prevent the two magnetic conductive members from heating up and the contact resistance of the dynamic spring assembly and the static contact assembly from increasing, and prevent the magnetic flux of the two magnetic conductive members from being affected, thereby ensuring the magnetic attraction force and the contact reliability of the dynamic spring assembly and the static contact assembly. In addition, in the embodiment of the present application, since the magnetic attraction force is used to enhance the contact attraction performance of the dynamic contact and the static contact to resist short circuit, there is no need to use more copper consumables to make a dynamic spring assembly with a larger structure volume, which also helps to reduce the amount and cost of copper consumables.

[0058] In addition, the contact parts of other embodiments of the present application also have the following advantages:

[0059] 1) By connecting and arranging a compression spring on the side of the moving spring body away from the static contact, when the moving contact and the static contact are in contact, the magnetic circuit driving mechanism pushes the compression spring toward the static contact side, and continues to move toward the static 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 pressing force for the moving contact, making the moving contact and the static contact more firmly in contact, and improving the short-circuit resistance of the relay, wherein the compression spring is fixed to the position where the moving contact is located 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 toward the first magnetic conductive part due to the magnetic attraction of the first magnetic conductive part and the second magnetic conductive part, the compression spring can be tilted and form a larger contact force with the magnetic circuit driving mechanism, thereby further making the moving contact and the static contact more firmly in contact, and improving the short-circuit resistance of the relay;

[0060] 2) On the compression spring, the first section has a larger inclination angle relative to the movable spring body than the second section. When the compression spring is deformed, the second section takes the connection position with the first section as a fulcrum and deforms before the first section. The first section deforms less or not at all. By setting the first section, the distance between the end of the second section and the movable spring body is increased, so that the distance between the two surfaces of the magnetic circuit driving mechanism for the second section and the movable spring body to abut against each other is larger. In this way, when the portion of the movable spring body between the moving contact point and the fixed end deforms toward the first magnetic conductive part, the movable end of the movable spring body will not abut against the magnetic circuit driving mechanism to destroy the magnetic attraction of the magnetic circuit driving mechanism, thereby improving the stability of the entire magnetic circuit driving mechanism, thereby ensuring that the anti-short circuit performance of the first magnetic conductive part and the second magnetic conductive part is always reliable and effective. In addition, compared with the compression spring structure that directly forms a large inclination with the movable spring body, the stress concentration of the second section at the connection position with the first section is smaller, the fatigue resistance is good, and the service life is long.

[0061] 3) When the compression spring is deformed, the first section does not deform, ensuring that there is still a large gap between the second section and the movable spring body when overtravel occurs, so as to prevent the movable spring body from pushing back the magnetic circuit drive mechanism due to deformation;

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

[0063] 5) One end of the compression spring is fixed between the moving contact and the movable end, and the other end is extended 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 is deformed toward the first magnetic conductive member, the compression spring and the magnetic circuit driving mechanism form a greater abutment force, thereby further making the moving contact and the static contact more firmly in contact, thereby improving the short-circuit resistance of the relay;

[0064] 6) The gap processed and set in the movable spring body can weaken the constraint on the movable spring body after the rigid second magnetic conductive member is fixed to the movable spring body, which helps to improve the flexibility and elasticity of the movable spring body, reduce the force required to push the moving contact to move, help reduce the voltage required for the magnetic circuit part to form an electromagnetic force, and reduce the energy consumption of the relay;

[0065] 7) When the moving contact and the static contact are in contact and closed, the gap between the first magnetic conductive member and the second magnetic conductive member is designed to be smaller than a preset value, so that a larger gap between the two can be avoided to provide a larger stroke for the movement of the second magnetic conductive member, and the movable end of the moving contact can be prevented from rotating in the reverse direction to act on the magnetic circuit driving mechanism, thereby reducing the risk of separation and disconnection of the moving contact and the static contact;

[0066] 8) The height of the second magnetic conductive member is greater than its width, which can reduce the restriction on the elasticity of the movable spring body, thereby also helping to reduce the electromagnetic force of the magnetic circuit driving mechanism driving the movable contact to move, helping to reduce the voltage required for the magnetic circuit driving mechanism to form the electromagnetic force, and can reduce the energy consumption of the relay;

[0067] 9) The cooperation between the upper limit protrusion on the movable spring lead-out piece and the upper limit groove of the housing can improve the fixing reliability of the movable spring lead-out piece and the ability to resist the stress of pulling outward, prevent the position of the movable spring lead-out piece from moving, and avoid the change of the magnetic gap between the two magnetic conductive parts, which may cause the failure of the anti-short circuit function;

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

[0069] 11) The structure and extension direction of the movable spring lead piece and the static 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 is an axonometric schematic diagram of an electromagnetic relay according to an embodiment of the present application;

[0071] Figure 2 This is an embodiment of the present application Figure 1 Schematic diagram along the Z direction;

[0072] Figure 3 It is a schematic diagram of the setting position of a compression spring of an electromagnetic relay in an embodiment of the present application;

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

[0074] Figure 5 It is a structural schematic diagram of a movable spring body in an embodiment of the present application;

[0075] Figure 6 This is an embodiment of the present application Figure 2 Schematic diagram of the cross section at the AA position;

[0076] Figure 7 is an axonometric schematic diagram of a movable spring lead-out piece of an embodiment of the present application;

[0077] Figure 8 This is an embodiment of the present application Figure 6 Schematic diagram along the Z direction;

[0078] Fig. 9 is a schematic diagram of a housing of an electromagnetic relay according to an embodiment of the present application;

[0079] Fig.10is an axonometric schematic diagram of a housing of an electromagnetic relay according to an embodiment of the present application;

[0080] Fig.11 is a schematic diagram of a static contact assembly according to an embodiment of the present application;

[0081] Fig.12 is a schematic diagram of a pushing member according to an embodiment of the present application;

[0082] Fig.13 It is a schematic diagram of the connection between the movable spring body, the compression spring and the pushing member in an embodiment of the present application.

[0083] Reference numerals:

[0084] Housing-10, static contact assembly-11, dynamic spring assembly-12, first magnetic conductive member-13, second magnetic conductive member-14, push member-15, compression spring-16, armature assembly-17, coil assembly-18, limit groove-102, support boss-103, static contact-111, static contact body-112, dynamic spring body-121, fixed end-121a, movable end-121b, dynamic contact-122, dynamic spring lead-out piece-123, bending part-121c, assembly groove-151, support part-10 31, stop portion 1032, first limiting groove 1021, second limiting groove 1022, first fixing portion 112a, first load connecting portion 112b, second fixing portion 123a, second load connecting portion 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 DESCRIPTION

[0085] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0086] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here. In addition, the "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally represents that the objects associated with each other are in an "or" relationship.

[0087] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0088] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0089] The electromagnetic relay provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0090] like Figure 1 and Figure 2 As shown, a schematic diagram of the structure of an electromagnetic relay according to an embodiment of the present application is shown, and the electromagnetic relay includes: a static contact assembly 11, a dynamic spring assembly 12, a first magnetic conductive member 13 and a second magnetic conductive member 14. The static contact assembly 11 and the dynamic spring assembly 12 are conductive members used to connect an external load circuit in the electromagnetic relay. The static contact assembly 11 includes a stationary static contact 111. The dynamic spring assembly 12 includes a dynamic spring body 121, which can be a metal spring sheet structure with elasticity. One end of the dynamic spring body 121 is a fixed end 121a, which can be riveted and fixed inside the electromagnetic relay and remain relatively still with the static contact assembly 11. The other end of the dynamic spring body 121 is a movable end 121b, which can swing relative to the static contact assembly 11. A movable contact 122 is provided at a position close to the movable end 121b. The movable contact 122 can be a hemispherical or truncated cone-shaped protrusion structure with a higher conductivity than the dynamic spring body 121. When the movable end 121b of the movable spring body 121 swings, the movable contact 122 is driven to contact or separate from the static contact 111, thereby realizing the on-off control of the electromagnetic relay.

[0091] In some embodiments, the dynamic spring assembly 12 is disposed on one side of the static contact assembly 11, for example Figure 1In the schematic diagram, the movable spring body 121 is located at the lower side of the static contact assembly 11, and the movable contact 122 is located at the lower side of the static contact 111, and the movable contact 122 is arranged face to face with the static contact 111. Since the movable spring body 121 itself has elasticity, the movable end 121b that is not constrained and fixed can swing relative to the fixed end 121a, driving the movable contact 122 to contact or separate from the static contact 111 opposite to it. Specifically, inside the relay, the movable end 121b of the movable spring body 121 can be connected to the magnetic circuit driving mechanism in the relay, and the driving force output by the magnetic circuit driving mechanism acts on the movable end 121b to drive the movable end 121b to swing.

[0092] In addition, if Figure 2 As shown, in the embodiment of the present application, a first magnetic conductive member 13 and a second magnetic conductive member 14 that can magnetically attract each other are provided for the static contact assembly 11 and the dynamic spring assembly 12. The magnetic attraction of the two enables the dynamic 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, combined Figure 2 and Figure 3 As shown in the figure, the first magnetic conductive member 13 can be mounted and fixed on an insulating structure that is fixed relative to the static contact assembly 11, and is located in the magnetic field formed when the part of the movable spring body 121 used for circulating current is passed through the current, and is located between the moving contact 122 and the fixed end 121a in the extension direction of the movable spring body 121. Therefore, the first magnetic conductive member 13 is a stationary fixed magnetic conductive member. Among them, 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, a fixing frame, etc. fixed to the housing 10. Specifically, in one embodiment of the present application, the insulating structure is the housing 10.

[0094] The second magnetic conductive member 14 and the movable spring body 121 in the embodiment of the present application can be riveted, welded or bonded together, and are located on the side away from the static contact 111, forming a face-to-face relative position relationship with the first magnetic conductive member 13. Figure 4 For example, the first magnetic conductive member 13 is located above the portion of the movable spring body 121 for circulating current and is in a stationary and fixed state. The second magnetic conductive member 14 is located at the portion of the movable spring body 121 for circulating current and can move with the movement of the movable contact 122 .

[0095] Once the moving contact 122 moves to contact and conduct with the static contact 111, the magnetic field formed by the current flowing through the moving spring body 121 will also magnetize the second magnetic conductive member 14. Thus, a closed magnetic circuit surrounding the moving spring body 121 is formed between the first magnetic conductive member 13 and the second magnetic conductive member 14, and a magnetic attraction force is generated between the first magnetic conductive member 13 and the second magnetic conductive member 14, with high magnetic efficiency, which helps to ensure that the moving contact 122 and the static contact 111 resist the electric repulsion with a larger and more stable contact force, and prevent the moving contact 122 and the static contact 111 from being bounced off by the electric repulsion. It should be noted that the second magnetic conductive member 14 and the first magnetic conductive member 13 can be magnetic conductive blocks or magnetic conductive sheets made of the same or different materials, and the materials can be iron, cobalt, nickel and alloys thereof.

[0096] In addition, in combination with the aforementioned connection description of the first magnetic conductive member 13, on the one hand, directly fixing the first magnetic conductive member 13 to the insulating structure can avoid excessive assembly relationships caused by the indirect fixing of the first magnetic conductive member 13 through other parts, which helps to ensure that the first magnetic conductive member 13 remains stationary stably and reliably, helps to ensure the stability of the magnetic gap, and can also save copper consumption costs caused by other parts. On the other hand, once a short circuit and large current occur in the relay, causing the first magnetic conductive member 13 and the second magnetic conductive member 14 to attract each other, the first magnetic conductive member 13 can avoid the first magnetic conductive member 13 and the second magnetic conductive member 14 from being connected to each other and generating heat under the isolation of the insulating structure, and avoid the weakening of the magnetic flux of the two, which helps to ensure the magnetic attraction and ensure that the performance of resisting the electromotive repulsion is not reduced.

[0097] In summary, the electromagnetic holding relay of the embodiment of the present application utilizes the magnetic attraction of the first magnetic conductive member 13 and the second magnetic conductive member 14, so that when a short-circuit large current occurs, the moving contact 122 and the static contact 111 can resist the electric repulsion caused by the short-circuit large current, thereby maintaining a closed conductive state, which can improve the working reliability of the relay. Since the static contact component 11 usually needs to be connected to an external load device, the stress generated during the connection may cause the position stability of the static contact component 11 to be affected. Therefore, if the first magnetic conductive member 13 is directly installed on the energized part or the non-energized part of the static contact component 11, the accuracy of the position of the first magnetic conductive member 13 will also be affected, which may cause the magnetic resistance between the second magnetic conductive member 14 to increase, the magnetic attraction force to decrease, and affect the anti-short circuit effect. Therefore, the fixed connection of the first magnetic conductive member 13 to the insulating structure fixed relative to the static contact component 11 also further ensures the stability and reliability of the magnetic attraction. Furthermore, the first magnetic conductive member 13 is installed on the insulating structure, which can prevent the dynamic spring assembly 12 and the static contact assembly 11 from being connected through the first magnetic conductive member 13 and the second magnetic conductive member 14, and can prevent the two magnetic conductive members from heating up and the contact resistance of the dynamic spring assembly 12 and the static contact assembly 11 from increasing, and avoid the magnetic flux of the two magnetic conductive members from being affected, thereby ensuring the magnetic attraction force and the contact reliability of the dynamic spring assembly 12 and the static contact assembly 11. In addition, in the embodiment of the present application, since the magnetic attraction force is used to enhance the contact attraction performance of the dynamic contact 122 and the static contact 111 to resist short circuit, there is no need to use more copper consumables to make a dynamic spring assembly with a larger structure volume, which also helps to reduce the amount and cost of copper consumables.

[0098] Alternatively, if Figure 2 As shown, in one embodiment, the electromagnetic relay of the embodiment of the present application further includes a compression spring 16, and the compression spring 16 is a reed structure with elasticity, such as Figure 2 As shown, one end of the compression spring 16 is fixedly connected to the movable spring body 121 by riveting or brazing, and its fixed position is the position of the movable contact 122 or between the fixed end 121a and the movable contact 122, and the other end extends obliquely relative to the movable spring body 121 to the position where the magnetic circuit driving mechanism is located.

[0099] When the magnetic circuit driving mechanism applies a force to the movable end 121b so that the moving contact 122 and the static contact 112 are in contact and conductive, the magnetic circuit driving mechanism also abuts against the other end of the compression spring 16 at the same time, causing the compression spring 16 to undergo elastic deformation, thereby generating pressure acting on the moving contact 122, so that the moving contact 122 and the static contact 112 are in close and reliable contact.

[0100] In this connection method, the compression spring 16 is fixed at the position of the moving contact 122 or between the moving contact 122 and the fixed end 121a, so that when the part of the moving spring body 121 located between the moving contact 122 and the fixed end 121a is deformed toward the side of the first magnetic conductive component 13 due to the magnetic attraction of the first magnetic conductive component 13 and the second magnetic conductive component 14, the compression spring 16 can tilt and form a greater abutment force with the magnetic circuit driving mechanism, thereby further making the moving contact 122 and the static contact 111 contact more firmly, thereby improving 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 driving mechanism, and the mounting groove has a first abutting surface and a second abutting surface opposite to each other, and the movable end 121b of the movable spring body 121 and the other end of the compression spring 16 both extend into the mounting groove. When the movable contact 122 and the static contact 111 are separated and disconnected, the movable end 121b abuts against the first abutting surface, and the other end of the compression spring 16 abuts against the second abutting surface. As the magnetic circuit driving mechanism gradually moves toward the static contact 111, the other end of the compression spring 16 is squeezed by the second abutting surface to generate bending deformation and store elastic potential energy, and the elastic force of the compression spring 16 also acts on the movable end 121b through the movable spring body 121. When the moving contact 122 and the static contact 111 are in contact and conductive, as the magnetic circuit driving mechanism continues to move toward the static contact 111, the movable end 121b separates from the first abutting surface. At this time, the second abutting surface continues to squeeze the compression spring 16, and the compression spring 16 continues to provide elastic force to the movable end 121b, so that the moving contact 122 and the static contact 112 are in close and reliable contact.

[0102] It should be noted that, after the moving contact 122 and the static contact 111 are in contact and connected, from the moment the movable end 121b separates from the first abutting surface until the magnetic circuit driving mechanism continues to move toward the static contact 111 to the end of its stroke, this interval is the overtravel action interval of the electromagnetic relay. In the overtravel action interval, the above-mentioned compression spring 16 provides the moving contact 122 and the static contact 111 with the elastic force required for close contact, which helps to reduce the risk of the moving contact 122 and the static contact 111 being bounced apart by the electric repulsion force.

[0103] In addition, in another embodiment, the fixed position of one end of the compression spring 16 and the movable spring body 121 can also be the position of the movable contact 122 or between the movable contact 122 and the movable end 121b, and the other end of the compression spring 16 extends obliquely relative to the movable spring body 121 to the side of the movable contact 122 facing the fixed end 121a. At this time, the other end of the compression spring 16 is closer to the fixed end 121a, and at this time, the driving end of the magnetic circuit driving mechanism set at the corresponding position can apply force to the compression spring 16 from the position close to the fixed end 121a, so that the position of the magnetic circuit driving mechanism can be flexibly adjusted.

[0104] Alternatively, if Figure 2 and Figure 3 As shown, in one embodiment, in the electromagnetic relay of the embodiment of the present application, the aforementioned compression spring 16 may include a first section 161 and a second section 162 that are relatively bent, wherein one end of the first section 161 is fixedly connected to the movable spring body 121, and the other end is fixedly connected to one end of the second section 162, and the other end of the second section 162 extends toward the magnetic circuit driving mechanism and can abut against it.

[0105] Combination Figure 2 and Figure 3 As shown in the diagram, the inclination angle of the first section 161 relative to the movable spring body 121 is greater than the inclination angle of the second section 162 relative to the movable spring body 121, so that it is easy to make the distance between the end of the second section 162 abutting against the magnetic circuit drive mechanism and the movable end 121b the same as the distance between the two abutting surfaces in the assembly groove, meeting the requirement of the electromagnetic relay overtravel action. Moreover, when the electromagnetic relay overtravels, the movable end 121b of the movable spring body 121 moves in a direction away from the static contact 111. The larger inclination angle of the first section 161 relative to the movable spring body 121 can also provide a longer avoidance space between the first section 161 and the movable end 121b, reducing the risk of the movable end 121b of the movable spring body 121 touching the first section 161, and preventing the movable spring body 121 from being deformed by the magnetic attraction of the first magnetic conductive member 13 and the second magnetic conductive member 14 and acting in the reverse direction on the magnetic circuit drive mechanism, causing the magnetic circuit drive mechanism to fail. In addition, compared with a compression spring structure with a larger inclination formed directly with the dynamic spring body 121, the stress concentration of the second section 162 at the connection position between the second section 162 and the first section 161 of this shape of compression spring 16 is smaller, and the fatigue resistance of the compression spring 16 is better and the service life is longer.

[0106] Optionally, in one embodiment, in the electromagnetic relay of the embodiment of the present application, each part of the compression spring 16 may have different elastic properties, for example, the elastic property of the first section 161 is weaker than the elastic property of the second section. Specifically, when the compression spring 16 is deformed, the first section 161 may not be deformed relative to the movable spring body 121, and only the second section 162 is bent and deformed relative to the movable spring body 121. It should be noted that the deformation of the first section 161 relative to the movable spring body 121 does not mean that the first section 161 is not deformed at all, but that the deformation amplitude of the first section 161 is smaller than the deformation amplitude of the second section 162, which can be basically ignored.

[0107] Alternatively, if Figure 3In one embodiment, the length of the first section 161 can be designed to be less than or equal to the length of the second section 162, so that the second section 162 is softer and easier to deform. Of course, in addition to this, the material hardness of the first section 161 can be made greater than the material hardness of the second section 162, or a reinforcing rib structure can be designed in the first section 161, and a gap can be opened in the second section 162 along its length direction, which can make the second section 162 easier to deform than the first section 161.

[0108] Alternatively, if Figure 2 As shown, in one embodiment, in the electromagnetic relay of the embodiment of the present application, along the extension direction X of the movable spring body 121, the extension direction X of the movable spring body 121 referred to in the present application is specifically the extension direction of the movable spring body 121 in the closed state with the static 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 conductive member 14 and the movable contact 122. At this time, the fixing part of the compression spring 16 and the movable spring body 121 is closer to the movable contact 122, and the length of the compression spring 16 is shorter, which can provide a larger pressing force for the movable contact 122, so that the movable contact 122 and the static contact 111 are in closer and more reliable contact.

[0109] Alternatively, if Figure 5 As shown, in one embodiment, in the electromagnetic relay of the embodiment of the present application, a slit 1211 is further processed and provided on the movable spring body 121, and the slit 1211 removes part of the material on the movable spring body 121 to form a hollow part, and the extension direction of the slit 1211 is parallel or inclined to the extension direction of the movable spring body 121, and at least part of the slit 1211 also extends to the part of the movable spring body 121 where the second magnetic conductive member 14 is fixed. Therefore, due to the existence of the slit 1211, part of the material of the movable spring body 121 is removed, which can weaken the constraint of the rigid second magnetic conductive member 14 on the movable spring body 121, help to improve the flexibility and elasticity of the movable spring body 121, can reduce the force required to push the movable contact 122 to move, help to reduce the voltage required for the magnetic circuit part to form an electromagnetic force, and can reduce the energy consumption of the relay.

[0110] Alternatively, if Figure 4 As shown, in one embodiment, in the electromagnetic relay of the embodiment of the present application, when the moving contact 122 is closed with the static contact 112, there is a gap between the first magnetic conductive member 13 and the second magnetic conductive member 14 which are arranged opposite to each other along the Y direction. The gap is the gap between the closest parts of the first magnetic conductive member 13 and the second magnetic conductive member 14. The existence of the gap can prevent the first magnetic conductive member 13 from directly contacting the second magnetic conductive member 14.

[0111] It should be noted that, combined with Figure 4As shown in the figure, when a short circuit and a large current occur in the relay, the first magnetic conductive member 13 and the second magnetic conductive member 14 are attracted to each other and approach each other, the movable spring body 121 will rotate with the contact position of the movable contact 122 and the static contact 111 as the fulcrum. If the rotation range is too large, the push rod 15 may be acted on by the compression spring 16 and / or the movable end 121b of the movable spring body 121 with a downward force along the Y direction. This force may cause the magnetic holding state of the magnetic circuit driving mechanism to be destroyed, thereby causing the movable contact 122 and the static contact 111 to separate and disconnect.

[0112] Therefore, in the embodiment of the present application, the above-mentioned gap can be designed to be smaller than a preset value so that the first magnetic conductive member 13 and the second magnetic conductive member 14 are as close as possible, avoiding a larger gap between the two to provide a larger stroke for the movement of the second magnetic conductive member 14, and preventing the movable end 121b on the left side of the moving contact 122 from rotating in the opposite direction to the push rod 15, thereby reducing the risk of the moving contact 122 and the static contact 111 being separated and disconnected. In addition, reducing the gap between the first magnetic conductive member 13 and the second magnetic conductive member 14 is also beneficial to reducing the magnetic resistance and increasing the magnetic attraction between the two, thereby ensuring good short-circuit resistance.

[0113] Alternatively, if Figure 4 As shown, in one embodiment, in the electromagnetic relay of the embodiment of the present application, the first dimension corresponding to the second magnetic conductive member 14 is its width parallel to the extension direction X of the movable spring body 121, and the second dimension corresponding to the second magnetic conductive member 14 is its length or height parallel to the width direction of the movable spring body 121, that is, the direction perpendicular to the paper surface. The first dimension is the dimension that coincides with the movable spring body 121 along the extension direction X. When the dimension is too large, it is easy to cause the second magnetic conductive member 14 and the movable spring body 121 to overlap too much, which will restrict the flexibility of the movable spring body 121. Therefore, in the embodiment of the present application, the second dimension is designed to be larger than the first dimension, so that the second magnetic conductive member 14 can be a narrower sheet structure, which can reduce the restriction on the elasticity of the movable spring body 121, thereby also helping to reduce the electromagnetic force of the magnetic circuit part driving the movable contact 122 to move, helping to reduce the voltage required for the magnetic circuit driving mechanism to form the electromagnetic force, and can reduce the energy consumption of the relay.

[0114] Optionally, in one implementation manner, in the electromagnetic relay of the embodiment of the present application, as Figure 6 As shown, along the width direction parallel to the dynamic spring body 121, the size of the first magnetic conductive member 13 is larger than the size of the second magnetic conductive member 14. Figure 6As shown in the figure, the dimension of the first magnetic conductive component 13 along this direction is the height H1 along the Z direction shown in the figure, and the dimension of the second magnetic conductive component 14 along this direction is the height H2 along the Z direction shown in the figure. The dimension H1 of the first magnetic conductive component 13 along the Z direction is greater than the dimension H2 of the second magnetic conductive component 14 along the Z direction. The depth space along the Z direction inside the relay can be fully utilized, so that the first magnetic conductive component 13 has a larger magnetic gathering volume, which can enhance the magnetic gathering effect and magnetic attraction, and further improve the ability to resist electric repulsion.

[0115] Optionally, in one implementation manner, in the electromagnetic relay of the embodiment of the present application, 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, and has an accommodating cavity inside, which is used to install and fix the contact part and the magnetic circuit driving mechanism of the relay. The dynamic spring assembly 12 also includes a dynamic spring lead-out piece 123, part of which is fixedly connected to the housing 10, and the fixed end 121a of the dynamic spring body 121 can be riveted and fixed to the dynamic spring lead-out piece 123, and the other part of the dynamic spring lead-out piece 123 extends outward from the housing 10 and is exposed in the housing 10, forming a wiring pin outside the relay, and 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 shown in the figure, the movable spring lead-out piece 123 is provided with at least one limiting protrusion 1231, and the limiting protrusion 1231 can be a convex structure directly stamped out on the movable spring lead-out piece 123 or a convex block structure welded and fixed on the movable spring lead-out piece 123, and the protruding direction of the limiting protrusion 1231 intersects with the extension direction of the movable spring lead-out piece 123. In addition, at least one limiting groove 102 is provided in the housing 10, and the limiting protrusion 1231 is embedded in the limiting groove 102. Through the clamping and limiting of the limiting protrusion 1231 and the limiting groove 102, the relative movement between the smooth and flat movable spring lead-out piece 123 and the housing 10 along the extension direction of the movable spring lead-out piece 123 can be avoided, so that the installation and fixation of the movable spring lead-out piece 123 is more stable and reliable. For example, when assembling the parts into a finished relay or installing the relay in an electrical device, improper operation or connection stress may cause relative movement between the dynamic spring lead-out piece 123 and the housing 10, causing the installation position of the dynamic spring lead-out piece 123 to change, affecting the operation of the relay or even causing a malfunction. The limiting protrusion 1231 and the limiting groove 102 of the embodiment of the present application can further improve the installation reliability of the dynamic spring lead-out piece 123, so as to ensure the position stability of the dynamic spring body 121, and then ensure the accuracy of the position of the second magnetic conductive member 14 of the dynamic contact, which helps to improve the product quality of the relay.

[0117] Optionally, in one implementation manner, in the electromagnetic relay of the embodiment of the present application, as Figures 7 to 9As shown, the limiting groove 102 may include a first limiting groove 1021 and a second limiting groove 1022 at two different positions, and correspondingly, the limiting protrusion 1231 may include a first limiting protrusion 12311 and a second limiting protrusion 12312 at two different positions. Figure 2 and Fig. 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 can be respectively located on different surfaces on both sides of the movable spring lead-out sheet 123 of the sheet structure.

[0118] In the embodiment of the present application, the limiting protrusions 1231 and the limiting grooves 102 at two different positions are engaged and limited, and are redundant with each other, which can further improve the installation reliability of the dynamic spring lead-out piece 123 and help improve the product quality of the relay.

[0119] Optionally, in one implementation manner, in the electromagnetic relay of the embodiment of the present application, as Figure 8 As shown, along the direction Y in which the movable spring lead-out piece 123 extends from the inside to the outside of the housing 10, the first limiting protrusion 12311 and the second limiting protrusion 12312 are arranged at intervals 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, so that the forces of the two limiting protrusions 1231 can be prevented from being concentrated on the same part of the movable spring lead-out piece 123, which is conducive to ensuring the strength of the movable spring lead-out piece 123.

[0120] Optionally, in one embodiment, in the electromagnetic relay of the embodiment of the present application, at least one of the matching relationship among the first limiting protrusion 12311 and the first limiting groove 1021, the second limiting protrusion 12312 and the second limiting groove 1022 can be an interference fit, which can ensure that the assembly of the movable spring lead-out piece 123 and the housing 10 is relatively stable and reliable. It can be understood that when the matching relationship at both places is an interference fit, the installation and fixation of the movable spring lead-out piece 123 is more reliable and not easy to loosen and move.

[0121] Optionally, in one implementation manner, in the electromagnetic relay of the embodiment of the present application, as Figure 2 and Fig. 9 As shown, when the two limiting protrusions 1231 and the two limiting grooves 102 are arranged at intervals along the Y direction 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 dynamic spring body 121, and the other limiting protrusion 1231 is farther from the dynamic spring body 121.

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

[0123] By designing the matching relationship between the two positions differently, the interference fit of the first limiting protrusion 12311, which is closer to the outside, can be achieved, and the clamping is tighter. This position is farther away from the movable spring body 123. When the exposed part of the movable spring lead-out piece 123 is pulled, it is difficult to cause the displacement of the internal movable spring lead-out piece 123. The position stability of the movable spring body 121 is conducive to ensuring the position stability of the movable contact 122 and the magnetic gap between the first magnetic conductive part 13 and the second magnetic conductive part 14. For the second limiting protrusion 12312, which is closer to the inside, it is designed to be a clearance fit with the second limiting groove 1022, which also helps to avoid over-positioning, thereby facilitating installation, reducing processing requirements and difficulty, and reducing the cost of the relay.

[0124] Optionally, in one implementation manner, in the electromagnetic relay of the embodiment of the present application, as Figure 2 As shown, the static contact assembly 11 further includes a static contact body 112, which is installed inside the housing 10 and remains stationary. For example, the static contact body 112 can be a sheet-like structure made by stamping a copper sheet or other conductors, and a static contact 111 can be riveted to one end of the static contact body 112. The end of the static contact body 112 where the static contact 111 is not installed can extend outward from the housing 10 to expose the housing 10 to form another wiring pin, and the other wiring pin can be electrically connected to the load that the relay needs to control.

[0125] Combination Fig.10 As shown in the figure, a support boss 103 is provided on the shell 10 of the embodiment of the present application at the portion where the static contact body 112 extends outward, and the portion of the static contact body 112 exposed from the shell 10 abuts against the support boss 103. The support boss 103 can support and fix the static contact body 112 outside the shell 10, thereby preventing the static contact body 112 from bending and pulling due to stress to fix the static contact point 111.

[0126] Optionally, in one implementation manner, in the electromagnetic relay of the embodiment of the present application, as Fig.10As shown, the support boss 103 includes a support portion 1031 and a stopper portion 1032. The stopper portion 1032 is connected to both sides of the support portion 1031 along the X direction shown in the figure. The stopper 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 static contact body 112 is embedded in the third limiting groove and abuts against the support portion 1031, the two sides of the static contact body 112 in the width direction are restricted by the stopper portion 1032, and the static contact body 112 is difficult to rotate or translate on the support portion 1031. At this time, the static contact body 112 is also more reliably installed and fixed, thereby ensuring the stability of the position of the static contact point 111.

[0127] Optionally, in one implementation manner, in the electromagnetic relay of the embodiment of the present application, as Fig.10 and Fig.11 As shown, in addition to using the stopper 1032 to restrict the movement of the static contact body 112, in order to further ensure that the static contact body 112 and the housing 10 remain relatively still, the support portion 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 prevent the static contact body 112 from translating relative to the housing 10 along the extension direction Y of the static contact body 112. Therefore, in this relay, the movement of the static contact body 112 relative to the housing 10 along the X direction and the Y direction can be restricted, and its installation position is more stable and reliable.

[0128] Exemplarily, one of the first positioning structure 10311 and the second positioning structure 1121 can be a positioning column protruding from the surface of the support portion 1031 (for example, a positioning column protruding from the surface of the support portion 1031), and the other can be a positioning hole (for example, a through hole penetrating the two opposite surfaces of the sheet-like static contact body 112). By inserting the positioning column into the positioning hole, the translation of the static contact body 112 relative to the support portion 1031 can be limited, and the static contact body 112 can be prevented from moving along the Y direction shown in the figure.

[0129] Optionally, in one implementation manner, in the electromagnetic relay of the embodiment of the present application, as Fig.10As shown, the support portion 1031 includes a first surface 1031a and a second surface 1031b that are arranged opposite to each other. Along the Z direction shown in the figure, the first surface 1031a is located at the top and is perpendicular to the side wall of the housing 10 from which the static contact body 112 extends. After the static contact body 112 extends from the housing 10 in the horizontal direction, a part of it is placed on the first surface 1031a and abuts against the first surface 1031a. The second surface 1031b at the bottom is inclined and intersects with the side wall of the housing 10 from which the static 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 the embodiment of the present application, the side wall perpendicular to the first surface 1031a and inclined to the second surface 1031b refers to a side wall extending from the static contact body 112.

[0130] Optionally, in an implementation manner, in the electromagnetic relay of the embodiment of the present application, the stationary contact body 112 and the movable spring lead-out piece 123 mentioned in the above-mentioned embodiment further satisfy the following characteristics respectively.

[0131] like Fig.11 As shown in the figure, the static contact body 112 includes a first fixed portion 112a and a first load connecting portion 112b which are connected as one piece and are both in sheet form. The static contact 111 is fixed to the first fixed portion 112a by riveting or brazing. The first fixed portion 112a and the static contact 111 are both located inside the housing 10. The first load connecting portion 112b extends outward from the housing 10 and is exposed from the housing 10. The first load connecting portion 112b can be used to electrically connect to the load that the relay needs to control, and the first load connecting portion 112b is connected to one side of the first fixed portion 111a along the width direction Z of the dynamic spring body 121 and is perpendicular to the first fixed portion 111a. Fig.10 As shown in FIG. 1 , the static contact body 112 may be an L-shaped part formed by stamping and bending a metal sheet, a portion of which is a first fixing portion 112a, and another portion of which is a first load connecting portion 112b. Figure 1 and Figure 2 As shown in FIG. 1 , when the static contact body 112 is assembled with the housing 10 , the thickness direction of the first load connecting portion 111 b is parallel to the width direction of the dynamic spring body 121 , both of which are perpendicular to the paper surface.

[0132] like Figure 7As shown in the figure, the movable spring lead-out piece 123 includes a second fixed portion 123a and a second load connecting portion 123b which are connected as one piece and are both in the shape of a sheet. The fixed end 112a is riveted and fixed to the second fixed portion 123a. The second fixed portion 123a and the fixed end 112a are both located inside the housing 10. The second load connecting portion 123b extends outward from the inside of the housing 10 and is exposed from the housing 10. The second load connecting portion 123b can be used to electrically connect to the load that the relay needs to control, and the second load connecting portion 123b is connected to a side of the second fixed portion 123a away from the movable end 121b and is perpendicular to the second fixed portion 123a. At this time, the aforementioned limiting protrusion 123 can be set on the second load connecting portion 123b. Combined with Figure 7 As shown in FIG. 1 , the movable spring lead-out piece 123 may be an L-shaped part formed by stamping and bending a metal sheet, a part of which is the second fixing portion 123a, and the other part is the second load connecting portion 123b. Figure 1 and Figure 2 As shown in FIG. 1 , when the movable spring lead-out piece 123 is assembled with the housing 10 , the thickness direction X of the second load connecting portion 123 b is parallel to the width direction of the movable spring body 121 .

[0133] Combined with the above-mentioned diagram, when the moving contact 122 and the static contact 111 are in contact and conductive, the direction of the current is "static contact body 112-static contact 111-moving contact 122-moving spring body 121-moving spring lead-out piece 123" or the opposite direction. At this time, in the U-shaped space surrounded by the static contact body 112, the moving spring body 121 and the moving spring lead-out piece 123, a magnetic field with the same magnetic flux direction can be stimulated to generate. The magnetic field strength in this area is superimposed, so that the first magnetic conductive member 13 located therein can have a stronger magnetic attraction effect.

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

[0135] Alternatively, if Figure 1 and Figure 2 As shown, in the embodiment of the present application, the static contact body 112 and the movable spring lead-out piece 123 extend from the same side wall of the housing 10. For example, the first load connection portion 111b and the second load connection portion 123b extend from the same side wall. This electromagnetic relay centrally arranges the parts for connecting the load on the same side wall, which is conducive to miniaturization of the relay and also improves the convenience of wiring.

[0136] Optionally, in one embodiment, the relay of the embodiment of the present application further includes a cover body, and the housing 10 has an opening; the static contact assembly 11, the dynamic spring assembly 12, the first magnetic conductive member 13 and the second magnetic conductive member 14 can be installed into the housing 10 from the opening. The cover body can also be made of an insulating material, and can be fixed to the housing 10 by a snap-on structure or bolts to block the opening of the housing 10, thereby making the housing 10 airtight and dustproof and waterproof. In addition, the cover body cooperates with the housing 10 in the Z direction shown in the figure to constrain the static contact body 112 and the dynamic spring lead-out piece 123 installed in the housing 10, so that they are firmly fixed in the Z direction (i.e., parallel to the width direction of the dynamic spring body 121). Optionally, as Figure 4 As shown, in one embodiment, an arched curved portion 121c is provided between the movable end 121b and the fixed end 121a of the movable spring body 121. The arched curved portion 121c can improve the flexibility and elasticity of the movable spring body 121, and is conducive to improving its current carrying capacity, overcurrent performance and determining the rotation fulcrum of the movable spring body 121. When the movable end 121b is driven to move by the pushing component, the movable end 121b of the movable spring body 121 swings in an arc trajectory with the curved portion 121c as the rotation fulcrum. At this time, the second magnetic conductive member 14 can be fixed between the curved portion 121c and the movable contact 122, so that the second magnetic conductive member 14 is closer to the movable contact 122 and the static contact 111, which can avoid the magnetic attraction between the first magnetic conductive member 13 and the second magnetic conductive member 14 being unable to reliably improve the anti-short circuit capability due to the existence of the curved portion 121c between the second magnetic conductive member 14 and the movable contact 122.

[0137] Alternatively, if 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 conductive member 13 used for magnetic conductivity is closer to the moving spring body 121 than the stationary contact 111. Thus, the magnetic gap between the first magnetic conductive member 13 and the second magnetic conductive member 14 can be reduced, which helps to improve the magnetic attraction.

[0138] Optionally, in one embodiment, the dynamic spring body 121 may include a plurality of dynamic spring branches arranged in parallel, each dynamic spring branch may be a metal spring sheet structure with elasticity, and the fixed ends of the plurality of dynamic spring branches may be connected as one. A dynamic contact 122 is provided at the movable end of each dynamic spring branch. By designing the dynamic spring body 121 as a structure in which the plurality of branches are connected in parallel, the current on the dynamic spring body 121 may be shunted, and for a single dynamic spring branch, when the current is reduced, its electric repulsion is also reduced.

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

[0140] Alternatively, if Fig.10 As shown, the opening side of the housing 10 is provided with a snap-in groove 101, and the first magnetic conductive member 13 can be installed and embedded in the snap-in groove 101 from the opening side. Then, after the cover body is fixed to the housing 10, the cover body can further constrain and fix the first magnetic conductive member 13 from the Z direction. Figure 2 As shown in the figure, along the X direction shown in the figure, protruding structures can be provided on both sides of the first magnetic conductive member 13. When the first magnetic conductive member 13 is embedded in the clamping groove 101, the protruding structure cooperates with the notch portion in the clamping groove 101, so that the first magnetic conductive member 13 is installed and fixed more stably and is not easy to loosen.

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

[0142] In addition, combined Fig.12 and Fig.13 As shown in the figure, one end of the pusher 15 is connected to the armature assembly 17, and the other end thereof is provided with a mounting groove 151; the two opposite surfaces in the mounting groove 151 are respectively the aforementioned first abutting surface 151a and the second abutting surface 151b. The movable end 121b and the end of the compression spring 16 are assembled in the mounting groove 151, and can respectively abut the two opposite surfaces in the mounting groove 151. For details, please refer to the description of the magnetic circuit driving mechanism in the previous embodiment, and no further description will be given here.

[0143] When the coil assembly 18 is excited, the armature assembly 17 can be driven to rotate, and then the armature assembly 17 drives the pusher 15 to move along the Y direction shown in the figure, and the pusher 15 can drive the movable end 121b to move, so as to achieve the contact or separation of the moving contact 122 and the static contact 111. In addition, it can be understood that when the electromagnetic relay of the embodiment of the present application includes the housing 10 of the aforementioned embodiment, the armature assembly 17 and the coil assembly 18 are both arranged in 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, in the embodiment of the present application, the first magnetic conductive member 13 is a straight flat plate, and the second magnetic conductive member 14 is a U-shaped member, and the opening side of the second magnetic conductive member 14 faces the first magnetic conductive member 13. The two magnetic conductive members of this shape can provide a larger magnetic field collection area, which is conducive to improving the magnetic field collection effect and magnetic attraction.

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

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

[0147] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0148] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An electromagnetic relay, characterized in that: The electromagnetic relay comprises: A static contact assembly (11), the static contact assembly (11) comprising a static contact point (111); A movable spring assembly (12), the movable spring assembly (12) comprising a movable spring body (121) and a movable contact (122) arranged on the movable spring body (121); one end of the movable spring body (121) is a fixed end (121a) that remains relatively still with respect to the static contact assembly (11), and the other end is a movable end (121b) that can swing relative to the static contact assembly (11); wherein the movable contact (122) is arranged close to the movable end (121b), and the movable contact (122) can contact or separate from the static contact (112); A first magnetic conductive member (13), the first magnetic conductive member (13) being fixedly connected to an insulating structure fixed relative to the static contact assembly (11), and being located on a side of the movable spring body (121) facing the static contact point (111); A second magnetic conductive member (14), the second magnetic conductive member (14) is fixedly connected to a side of the movable spring body (121) away from the static contact (112) and is located between the movable contact (122) and the fixed end (121a), and the second magnetic conductive member (14) is arranged opposite to the first magnetic conductive member (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), one end of which is fixedly connected to the movable spring body (121) and fixed at the location of the movable contact (122) or between the fixed end (121a) and the movable contact (122), and the other end of which extends obliquely relative to the movable spring body (121) and can be deformed by abutment by the magnetic circuit driving mechanism and provide contact pressure to the movable contact (122).

3. The electromagnetic relay according to claim 2, characterized in that: The compression spring (16) comprises a first section (161) and a second section (162); two ends of the first section (161) are respectively fixedly connected to the movable spring body (121) and one end of the second section (162); the other end of the second section (162) is used for abutting against the magnetic circuit driving mechanism; an inclination angle of the first section (161) relative to the movable spring body (121) is greater than an inclination angle of the second section (162) relative to the movable spring body (121).

4. The electromagnetic relay according to claim 3, characterized in that: When the compression spring (16) is deformed, the first section (161) does not deform relative to the movable spring body (121), and the second section (162) deforms relative to the movable spring body (121).

5. The electromagnetic relay according to claim 4, characterized in that: The length of the first section (161) is less than or equal to the length of the second section (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 conductive member (14) and the movable 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), one end of which is fixedly connected to the movable spring body (121) and fixed at the location of the movable contact (122) or between the movable contact (122) and the movable end (121b), and the other end of which is inclined relative to the movable spring body (121) and extends to the side of the movable contact (122) facing the fixed end (121a), and can be deformed by abutment by a magnetic circuit driving mechanism and provide contact pressure to the movable contact (122).

8. The electromagnetic relay according to claim 2 or 7, characterized in that: The movable spring body (121) is provided with a slit (1211), the extension direction of the slit (1211) is parallel to or inclined with the extension direction of the movable spring body (121), and at least part of the slit (1211) extends to the position of the movable spring body (121) where the second magnetic conductive member (14) is fixed.

9. The electromagnetic relay according to claim 1, characterized in that: When the moving contact (122) and the static contact (112) are in contact and closed, the gap between the first magnetic conductive member (13) and the second magnetic conductive member (14) is smaller than a preset value.

10. The electromagnetic relay according to claim 1, characterized in that: Parallel to the extension direction of the movable spring body (121), the second magnetic conductive member (14) has a first size; Parallel to the width direction of the movable spring body (121), the second magnetic conductive member (14) has a second size; The second size is greater than the first size.

11. The electromagnetic relay according to claim 1, characterized in that: Parallel to the width direction of the movable spring body (121), the size of the first magnetic conductive component (13) is greater than the size of the second magnetic conductive component (14).

12. The electromagnetic relay according to claim 1, characterized in that: The electromagnetic relay further comprises a housing (10), and the movable spring assembly (12) further comprises a movable spring lead-out piece (123); a portion of the movable spring lead-out piece (123) is fixedly connected to the housing (10), and is fixedly connected to and electrically connected to the fixed end (112a), and another portion of the movable spring lead-out piece (123) extends outward from the housing (10) to be exposed from the housing (10); The movable spring lead-out piece (123) is provided with at least one limiting protrusion (1231), and the protruding direction of the limiting protrusion (1231) intersects with the extending direction of the movable spring lead-out piece (123). The housing (10) is provided with at least one limiting groove (102), 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) comprises a first limiting groove (1021) and a second limiting groove (1022); the limiting protrusion (1231) comprises a first limiting protrusion (12311) and a second limiting protrusion (12312); The first limiting protrusion (12311) and the second limiting protrusion (12312) are arranged at different positions of the movable 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 movable spring lead-out piece (123) extends from the inside of the housing (10) to the outside, the first limiting protrusion (12311) and the second limiting protrusion (12312) are arranged in an offset manner.

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

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

17. The electromagnetic relay according to claim 12, characterized in that: The static contact assembly (11) further comprises a static contact body (112), the static contact point (111) being fixedly connected to the static contact body (112), a portion of the static contact body (112) being fixed in the housing (10) and being fixedly connected to the static contact point (111), and another portion of the static contact body (112) extending outward from the housing (10) and exposed from the housing (10); A supporting boss (103) is provided on the shell (10) at a portion where the static contact body (112) extends outward, and a portion of the static contact body (112) exposed outside the shell (10) abuts against the supporting boss (103).

18. The electromagnetic relay according to claim 17, characterized in that: The supporting boss (103) comprises a supporting portion (1031) and a stop portion (1032) connected to opposite sides of the supporting portion (1031); the stop portion (1032) and the supporting portion (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 supporting portion (1031).

19. The electromagnetic relay according to claim 18, characterized in that: 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), and the first positioning structure (10311) and the second positioning structure (1121) cooperate with each other to limit the translation of the stationary contact body (112) relative to the housing (10) along the extension direction of the stationary contact body (112).

20. The electromagnetic relay according to claim 19, characterized in that: One of the first positioning structure (10311) and the second positioning structure (1121) is a positioning column, and the other is a positioning hole, and the positioning column is inserted into 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) disposed opposite to each other, wherein the first surface (1031a) is perpendicular to a side wall of the shell (10) from which the static contact body (112) extends, and the second surface (1031b) is inclined to intersect with the side wall of the shell (10) from which the static contact body (112) extends at an obtuse angle, wherein the static contact body (112) abuts against the first surface (1031a).

22. The electromagnetic relay according to claim 17, characterized in that: The static contact body (112) comprises a first fixed portion (111a) and a first load connecting portion (111b) which are connected as one body and are both in sheet shape, the static contact (111) is fixed to the first fixed portion (111a), and the first load connecting portion (111b) extends outward from the inside of the housing (10) and is exposed from the housing (10), wherein the first load connecting portion (111b) is connected to one side of the first fixed portion (111a) along the width direction of the movable spring body (121) and is perpendicular to the first fixed portion (111a), and the thickness direction of the first load connecting portion (111b) is parallel to the width direction of the movable spring body (121).

23. The electromagnetic relay according to claim 12, characterized in that: The movable spring lead-out sheet (123) comprises a second fixed portion (123a) and a second load connecting portion (123b) which are connected as one and both are in the shape of a sheet, the fixed end (112a) is riveted and fixed to the second fixed portion (123a), the second load connecting portion (123b) extends outward from the inside of the housing (10) and is exposed from the housing (10), wherein the second load connecting portion (123b) is connected to a side of the second fixed portion (123a) away from the movable end (121b) and is perpendicular to the second fixed portion (123a), and the thickness direction of the second load connecting portion (123b) is perpendicular to the width direction of the movable spring body (121).

24. The electromagnetic relay according to claim 12, characterized in that: The stationary contact body (112) and the movable spring lead-out piece (123) extend from the same side wall of the housing (10).

25. The electromagnetic relay according to claim 12, characterized in that: The invention also comprises a cover body, wherein the housing (10) has an opening; the static contact assembly (11), the dynamic spring assembly (12), the first magnetic conductive member (13) and the second magnetic conductive member (14) can be installed into the housing (10) through the opening; the cover body is fixedly connected to the opening position of the housing (10), and cooperates with the housing (10) to limit the displacement of the static contact member body (112) and the dynamic spring lead-out piece (123) along the width direction of the dynamic spring body (121).

26. The electromagnetic relay according to claim 1, characterized in that: An arched curved portion (121c) is provided between the movable end (121b) and the fixed end (121a), and the second magnetic conductive member (14) is fixed between the curved portion (121c) and the movable 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 conductive member (13) used for conducting magnetism is closer to the moving spring body (121) than to the stationary contact (111).

28. The electromagnetic relay according to claim 1, characterized in that: The movable spring body (121) comprises a plurality of movable spring branches arranged in parallel, and each of the movable spring branches is provided with the movable contact point (122); The second magnetic conductive part (14) is fixed to the part of each of the movable spring branches used for current circulation, and each of the second magnetic conductive parts (14) corresponds to one of the first magnetic conductive parts (13) or corresponds to the same first magnetic conductive part (13).

29. The electromagnetic relay according to claim 12, characterized in that: The housing (10) is provided with a clamping groove (101), and the first magnetic conductive member (13) is embedded in the clamping groove (101).

30. The electromagnetic relay according to claim 2, characterized in that: The magnetic circuit driving mechanism comprises a magnetic circuit part and a pusher (15); the magnetic circuit part has a magnetic holding function and comprises 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 thereof is provided with a mounting groove (151); the movable end (121b) and the end of the compression spring (16) are mounted in the mounting groove (151); The coil assembly (18) drives the armature assembly (17) to rotate through excitation, and the armature assembly (17) drives the movable end (121b) to move through the pushing member (15).

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

32. An electrical device, characterized in that: The electrical device comprises the electromagnetic relay according to any one of claims 1 to 31.

33. The electrical device according to claim 32, characterized in that: The electricity-consuming device comprises an electricity meter.

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