Magnetic circuit system and electromagnetic relay

Abstract

The utility model discloses a magnetic circuit system and an electromagnetic relay. The magnetic circuit system comprises a coil assembly, a first yoke arm, a second yoke arm, a third yoke arm, a fourth yoke arm and an armature assembly, and the coil assembly comprises at least two windings; the first yoke arm and the second yoke arm are connected to the two opposite ends of the coil assembly, the third yoke arm and the fourth yoke arm are connected to the two opposite ends of the coil assembly, the first yoke arm and the third yoke arm are located at the same end, and the second yoke arm and the fourth yoke arm are located at the same end; when the armature assembly is in lap joint with one of the first yoke arm and the third yoke arm and one of the second yoke arm and the fourth yoke arm, the magnetic circuit system is provided with a first magnetic loop. When the armature assembly is in lap joint with the other one of the first yoke arm and the third yoke arm and the other one of the second yoke arm and the fourth yoke arm, the magnetic circuit system is provided with a second magnetic loop. The magnetic flux loss can be reduced, the magnetic energy utilization rate is improved, the electromagnetic attraction is improved, and the action sensitivity is improved.

Description

Technical Field

[0001] This application belongs to the technical field of relays, and particularly relates to a magnetic circuit system and an electromagnetic relay. Background Art

[0002] In the electrical engineering industry, electromagnetic relays are widely used as control devices. They have a control system (also known as the input circuit) and a controlled system (also known as the output circuit), and are usually applied to automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays roles such as automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] A magnetic latching relay is a type of electromagnetic relay. In existing electromagnetic relays, when the magnetic circuit system is working, the magnetic fields generated by its coil components are prone to interfere with each other, resulting in a decrease in magnetic flux and thus a lower magnetic efficiency. Utility Model Content

[0004] The purpose of the embodiments of this application is to provide a magnetic circuit system and an electromagnetic relay, which can solve the problem that the existing magnetic circuit systems are prone to interfere with each other, resulting in a decrease in magnetic flux and thus a lower magnetic efficiency.

[0005] To solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, the embodiments of this application provide a magnetic circuit system, which includes a coil assembly, a first yoke arm, a second yoke arm, a third yoke arm, a fourth yoke arm, and an armature assembly. The coil assembly includes at least two windings;

[0007] The first yoke arm and the second yoke arm are connected to opposite ends of the coil assembly. The third yoke arm and the fourth yoke arm are connected to opposite ends of the coil assembly, and the first yoke arm and the third yoke arm are located at the same end, and the second yoke arm and the fourth yoke arm are located at the same end;

[0008] When the armature assembly is lapped with one of the first yoke arm and the third yoke arm and one of the second yoke arm and the fourth yoke arm, the magnetic circuit system has a first magnetic circuit;

[0009] When the armature assembly is lapped with the other of the first yoke arm and the third yoke arm and the other of the second yoke arm and the fourth yoke arm, the magnetic circuit system has a second magnetic circuit.

[0010] Optionally, when the armature assembly is lapped with the first yoke arm and the fourth yoke arm, the magnetic circuit system has a first magnetic circuit; or,

[0011] When the armature assembly overlaps with the second yoke arm and the third yoke arm, the magnetic circuit system has a second magnetic circuit.

[0012] Optionally, the first yoke arm, the second yoke arm, the third yoke arm, and the fourth yoke arm enclose an accommodation space, and the armature assembly is rotatably arranged in the accommodation space;

[0013] When the armature assembly rotates to the first position, the armature assembly overlaps with the first yoke arm and the fourth yoke arm;

[0014] When the armature assembly rotates to the second position, the armature assembly overlaps with the first yoke arm and the fourth yoke arm.

[0015] Optionally, the first yoke arm, the second yoke arm, the third yoke arm, and the fourth yoke arm are all L-shaped, including a first arm and a second arm that are perpendicular to each other. The four second arms are connected to the ends of the coil assembly, and the four first arms enclose the accommodation space.

[0016] Optionally, the coil assembly includes a first iron core and a second iron core;

[0017] A first winding is wound around the outside of the first iron core, a second winding is wound around the outside of the second iron core, and the winding directions of the first winding and the second winding are the same;

[0018] The first yoke arm and the second yoke arm are fixed to both ends of the first iron core, and the third yoke arm and the fourth yoke arm are fixed to both ends of the second iron core.

[0019] Optionally, two yoke arms at one end of both ends of the coil assembly are connected together to keep the corresponding magnetic circuit continuously conducting.

[0020] Optionally, the axes of the first iron core and the second iron core are parallel to form a first reference plane, and the first reference plane is perpendicular to the rotation axis of the armature assembly.

[0021] Optionally, the length of the first iron core is less than the length of the second iron core;

[0022] Along the length direction of the iron core, the first yoke arm and the third yoke arm are arranged at intervals, and the second yoke arm and the fourth yoke arm are arranged at intervals;

[0023] The first yoke arm and the third yoke arm are simultaneously fixedly connected to the first iron core to keep the corresponding magnetic circuit continuously conducting, or the second yoke arm and the fourth yoke arm are simultaneously fixedly connected to the first iron core to keep the corresponding magnetic circuit continuously conducting.

[0024] Optionally, the axes of the first iron core and the second iron core are parallel to form a second reference plane, and the second reference plane is parallel to the rotation axis of the armature assembly.

[0025] Optionally, the length of the first iron core is equal to the length of the second iron core;

[0026] Along the rotation axis direction of the armature assembly, the first yoke arm and the third yoke arm are spaced apart; the second yoke arm and the fourth yoke arm are integrally connected to keep the corresponding magnetic circuit continuously conducting; or,

[0027] Along the rotation axis direction of the armature assembly, the second yoke arm and the fourth yoke arm are spaced apart; the first yoke arm and the third yoke arm are integrally connected to keep the corresponding magnetic circuit continuously conducting.

[0028] Optionally, both ends of the first winding extend out to form a first pin and a second pin, and both ends of the second winding extend out to form a third pin and a fourth pin;

[0029] The second pin and the third pin are electrically connected to connect the first winding and the second winding, and the first pin and the fourth pin are used to receive a low-voltage control signal.

[0030] Optionally, the armature assembly includes a first armature, a second armature and a permanent magnet;

[0031] The first armature and the second armature are arranged in parallel and spaced apart, and the permanent magnet is clamped between the first armature and the second armature;

[0032] Both ends of the first armature are first magnetic poles with the same polarity, both ends of the second armature are second magnetic poles with the same polarity, and the polarities of the first magnetic pole and the second magnetic pole are opposite.

[0033] Optionally, at least two windings in the coil assembly are connected in series.

[0034] In a second aspect, the present application also provides an electromagnetic relay, including the magnetic circuit system as described in the first aspect of the present application.

[0035] Optionally, the electromagnetic relay further includes a push rod, a moving contact assembly and a stationary contact assembly;

[0036] The armature assembly is connected to one end of the push rod, and the moving contact assembly is connected to the other end of the push rod; the stationary contact assembly is arranged opposite to the moving contact assembly, and the moving contact assembly can be in a contact or disconnected state relative to the stationary contact assembly;

[0037] When forming the first magnetic circuit, the static reed assembly and the moving reed assembly are kept in one of the states of contact or disconnection; when forming the second magnetic circuit, the static reed assembly and the moving reed assembly are kept in the other state of contact or disconnection.

[0038] In the embodiment of the present application, two yoke iron arms are respectively and fixedly installed at both ends of the coil assembly. The coil assembly, the armature assembly and the two yoke iron arms at both ends of the coil assembly can form a magnetic circuit, and the coil assembly, the armature assembly and the other two yoke iron arms at both ends of the coil assembly can form another magnetic circuit. At different times, these two magnetic circuits are independent of each other and do not interfere with each other, which can reduce the magnetic flux loss of the magnetic circuit system, improve the magnetic energy utilization rate of the coil assembly, improve the magnetic efficiency, help to enhance the electromagnetic suction, improve the action sensitivity of the armature assembly, and make it respond quickly.

[0039] In addition, the magnetic circuit system of other embodiments of the present application also has the following advantages: 1) When the two yoke iron arms at any one end of the coil assembly are connected together, it can be ensured that after the coil assembly in this magnetic circuit system is powered off, both the first magnetic circuit and the second magnetic circuit remain as closed magnetic circuits. 2) When two iron cores and two windings are adopted, the reference planes formed by the two iron cores can be parallel or perpendicular to the rotation axis of the armature assembly, so as to meet the requirements of miniaturization of the installation size and volume in different use environments. 3) The four L-shaped yoke iron arms enclose a space for installing and placing the armature assembly, which also helps to design the magnetic circuit system to be more compact and lightweight. Description of the Drawings

[0040] Figure 1 is an isometric view of the first electromagnetic relay according to the embodiment of the present application;

[0041] Figure 2 is of the embodiment of the present application Figure 1 schematic diagram along the -Z direction;

[0042] Figure 3 is of the embodiment of the present application Figure 1 exploded view of the magnetic circuit system in;

[0043] Figure 4 is an isometric view of the second electromagnetic relay according to the embodiment of the present application;

[0044] Figure 5 is of the embodiment of the present application Figure 4 schematic diagram along the -Z direction;

[0045] Figure 6 is of the embodiment of the present application Figure 4 exploded view of the magnetic circuit system in;

[0046] Figure 7 is of the embodiment of the present application Figure 1Schematic diagram of the electromagnetic relay in the closed state;

[0047] Figure 8 is an embodiment of the present application Figure 1 Schematic diagram of the electromagnetic relay in the open state;

[0048] Figure 9 is an embodiment of the present application Figure 4 Schematic diagram of the electromagnetic relay in the closed state;

[0049] Figure 10 is an embodiment of the present application Figure 4 Schematic diagram of the electromagnetic relay in the open state;

[0050] Figure 11 is a simplified schematic diagram of another magnetic circuit system of the embodiment of the present application;

[0051] Figure 12 is a simplified schematic diagram of another magnetic circuit system of the embodiment of the present application;

[0052] Figure 13 is a plan view of the armature assembly of the embodiment of the present application.

[0053] Reference numerals:

[0054] Coil assembly - 10, first yoke iron arm - 21, second yoke iron arm - 22, third yoke iron arm - 23, fourth yoke iron arm - 24, first arm - 2a, second arm - 2b, accommodation space - 25, armature assembly - 30, rotating shaft - 31, push rod - 40, moving reed assembly - 41, static reed assembly - 42, first armature - 301, second armature - 302, moving contact - 411, moving reed - 412, moving reed lead - out piece - 413, static contact - 421, static reed lead - out piece - 422. Detailed implementation manners

[0055] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The magnetic circuit system and the electromagnetic relay provided in the embodiments of the present application are described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0060] Reference Figures 1 to 6 , shows a schematic structural diagram of a magnetic circuit system according to an embodiment of the present application, the magnetic circuit system comprises a coil assembly 10, a first yoke arm 21, a second yoke arm 22, a third yoke arm 23, a fourth yoke arm 24 and an armature assembly 30, the coil assembly 10 comprises at least two windings;

[0061] The first yoke arm 21 and the second yoke arm 22 are connected to opposite ends of the coil assembly 10, the third yoke arm 23 and the fourth yoke arm 24 are connected to opposite ends of the coil assembly 10, and the first yoke arm 21 and the third yoke arm 23 are located at the same end, and the second yoke arm 22 and the fourth yoke arm 24 are located at the same end;

[0062] When the armature assembly 30 overlaps with one of the first yoke arm 21 and the third yoke arm 23 and one of the second yoke arm 22 and the fourth yoke arm 24, the magnetic circuit system has a first magnetic circuit;

[0063] When the armature assembly 30 overlaps with the other of the first yoke arm 21 and the third yoke arm 23 and the other of the second yoke arm 22 and the fourth yoke arm 24, the magnetic circuit system has a second magnetic circuit.

[0064] The magnetic circuit system of the embodiment of the present application is a magnetic circuit system for an electromagnetic relay, as Figures 1 to 6 schematic diagrams of magnetic circuit systems with different structures. Their common features are as follows. Such magnetic circuit systems all include a coil assembly 10, a first yoke arm 21, a second yoke arm 22, a third yoke arm 23, a fourth yoke arm 24, and an armature assembly 30. In the embodiment of the present application, the coil assembly 10 includes at least two windings. For this structure of the coil assembly 10, since the traditional single winding is improved to two or more windings, when the enameled wire is wound to form the corresponding windings, the winding circumference becomes shorter and the number of turns increases faster. Therefore, with the same coil length, there are more turns in the winding, which can enhance the magnetic suction force of the coil assembly 10. In the embodiment of the present application, in order to avoid the interference of the magnetic fields formed by different windings and prevent the reduction of the magnetic suction force, the number and position of the yoke arms in the magnetic circuit system are correspondingly improved.

[0065] Combined with Figure 1 or Figure 4 schematic diagrams, the first yoke arm 21 and the third yoke arm 23 are installed and fixed at one end of the electromagnetic assembly 10 along the -X direction, and the second yoke arm 22 and the fourth yoke arm 24 are installed and fixed at one end of the electromagnetic assembly 10 along the +X direction. Combined with Figure 2 and Figure 5 schematic diagrams, the first yoke arm 21 and the second yoke arm 22 are arranged opposite to each other along the ±X direction, and the third yoke arm 23 and the fourth yoke arm 24 are arranged opposite to each other along the ±X direction. The above-mentioned armature assembly 30 is connected to the rotating shaft 31. One end of the rotating shaft 31 is rotatably connected to the bracket structure (not shown in the figure) of the electromagnetic relay, and one end of the rotating shaft 31 is rotatably connected to the base structure (not shown in the figure) of the electromagnetic relay. Thus, the armature assembly 30 can rotate relative to each yoke arm.

[0066] The coil assembly 10 is used to generate a magnetic field in the magnetic circuit system. After the coil assembly 10 is powered on, each yoke iron arm is magnetized to generate magnetism. Under the action of the magnetic force, the armature assembly 30 can rotate in different directions around the rotating shaft 31. When the armature assembly 30 contacts one of the yoke iron arms at one end in the +X direction and -X direction respectively, different magnetic circuits can be correspondingly formed. It should be noted that the change in the rotation direction of the armature assembly 30 changes with the acting direction of the magnetic force of the yoke iron arm, the magnetic force of the yoke iron arm changes with the magnetic field of the coil assembly 10, and the magnetic field of the coil assembly 10 changes with the voltage direction in the coil assembly 10. Regarding the basic theory of the electromagnetic induction principle, no excessive elaboration is made in the embodiments of the present application.

[0067] Specifically, after the armature assembly 30 rotates, the armature assembly 30 overlaps with one of the yoke iron arms at each end of the coil assembly 10. At this time, the magnetic circuit system forms a corresponding magnetic circuit. Combining Figure 2 With the schematic diagram, when the armature assembly 30 overlaps with one of the first yoke iron arm 21 and the third yoke iron arm 23 located in the -X direction, and at the same time also overlaps with one of the second yoke iron arm 22 and the fourth yoke iron arm 24 located in the +X direction, the magnetic circuit system has a first magnetic circuit.

[0068] When the armature assembly 30 overlaps with the other one of the first yoke iron arm 21 and the third yoke iron arm 23 located in the -X direction, and at the same time also overlaps with the other one of the second yoke iron arm 22 and the fourth yoke iron arm 24 located in the +X direction, the magnetic circuit system has a second magnetic circuit.

[0069] It can be understood that whether it is the first magnetic circuit or the second magnetic circuit, they are both magnetic circuits formed by the iron core in the coil assembly 10 and the two yoke iron arms at both ends of the coil assembly 10. Since the armature assembly 30 overlaps with the yoke iron arms at different positions at different times, therefore, the first magnetic circuit and the second magnetic circuit can be formed at different times and there will be no interference.

[0070] Therefore, in the magnetic circuit system of the embodiments of the present application, two yoke iron arms are respectively installed and fixed at both ends of the coil assembly 10, and an armature assembly 30 cooperates with the two yoke iron arms at both ends of the coil assembly 10 at the same time to form a corresponding magnetic circuit. Thus, the iron core in the coil assembly 10, the armature assembly 30 and the two yoke iron arms at both ends of the coil assembly 10 can form a magnetic circuit, and the iron core in the coil assembly 10, the armature assembly 30 and the other two yoke iron arms at both ends of the coil assembly 10 can form another magnetic circuit. At different times, these two magnetic circuits are independent of each other and do not interfere with each other, which can reduce the magnetic flux loss of the magnetic circuit system, improve the magnetic energy utilization rate of the coil assembly 10, improve the magnetic efficiency, help to increase the electromagnetic suction, improve the action sensitivity of the armature assembly 30, and make it respond quickly.

[0071] Optionally, referring to Figures 7 to 10When the armature assembly 30 is lapped with the first yoke arm 21 and the fourth yoke arm 24, the magnetic circuit system has a first magnetic circuit; or,

[0072] When the armature assembly 30 is lapped with the second yoke arm 22 and the third yoke arm 23, the magnetic circuit system has a second magnetic circuit.

[0073] Specifically, in one implementation, as Figure 7 or Figure 9 shown in the schematic diagram, one end of the armature assembly 30 can be lapped with the first yoke arm 21 at one end of the coil assembly 10, and the other end of the armature assembly 30 can be lapped with the fourth yoke arm 21 at the other end of the coil assembly 10. At this time, the iron core in the coil assembly 10, the armature assembly 30, the first yoke arm 21, and the fourth yoke arm 24 can form a first magnetic circuit. As Figure 8 or Figure 10 shown in the schematic diagram, at another moment, when the position of the armature assembly 30 changes, one end of the armature assembly 30 can be lapped with the second yoke arm 22 at one end of the coil assembly 10, and the other end of the armature assembly 30 can be lapped with the third yoke arm 23 at the other end of the coil assembly 10. At this time, the iron core in the coil assembly 10, the armature assembly 30, the second yoke arm 22, and the third yoke arm 23 can form a second magnetic circuit.

[0074] It should be noted that, in combination with the illustration, at any moment, the two yoke arms that are lapped with the armature assembly 30 simultaneously can be distributed on both sides of the armature assembly 30. For example, the first yoke arm 21 and the fourth yoke arm 24 are distributed on the left and right sides of the armature assembly 30, and the second yoke arm 22 and the third yoke arm 23 are distributed on the left and right sides of the armature assembly 30. Thus, it is convenient to provide an installation space for the armature assembly 30.

[0075] Optionally, referring to Figures 7 to 10 , the first yoke arm 21, the second yoke arm 22, the third yoke arm 23, and the fourth yoke arm 24 enclose an accommodation space 25, and the armature assembly 30 is rotatably arranged in the accommodation space 25;

[0076] When the armature assembly 30 rotates to the first position, the armature assembly 30 is lapped with the first yoke arm 21 and the fourth yoke arm 24;

[0077] When the armature assembly 30 rotates to the second position, the armature assembly 30 is lapped with the first yoke arm 21 and the fourth yoke arm 24.

[0078] Specifically, as Figure 7 or Figure 9As shown in the figure, the parts where the four yoke iron arms extend from both ends of the coil assembly 10 enclose an accommodation space 25, and the armature assembly 30 is installed and arranged in this accommodation space 25. The end parts of the four yoke iron arms are respectively located at the four corners of the armature assembly 30. In the magnetic circuit system with this structure, controlling the armature assembly 30 to rotate in two opposite directions can form two different magnetic circuits.

[0079] As Figure 7 or Figure 9 shown, when the armature assembly 30 rotates clockwise around the rotating shaft 31 to the first position shown in the figure, in the -X direction, the armature assembly 30 overlaps with the first yoke iron arm 21, and in the +X direction, the armature assembly 30 overlaps with the fourth yoke iron arm 24, thereby forming Figure 7 or Figure 9 the first magnetic circuit shown by the dotted line. As Figure 8 or Figure 10 shown, when the armature assembly 30 rotates counterclockwise around the rotating shaft 31 to the second position shown in the figure, in the -X direction, the armature assembly 30 overlaps with the third yoke iron arm 23, and in the +X direction, the armature assembly 30 overlaps with the second yoke iron arm 22, thereby forming Figure 8 or Figure 10 the second magnetic circuit shown by the dotted line.

[0080] This layout structure of installing the armature assembly 30 in the space enclosed by the four yoke iron arms has a higher integration degree, which is beneficial to making the size and volume of the magnetic circuit system smaller, and helps to realize the miniaturized development and design of the product.

[0081] Optionally, referring to Figures 1 to 6 , the first yoke iron arm 21, the second yoke iron arm 22, the third yoke iron arm 23 and the fourth yoke iron arm 24 are all L-shaped, including a first arm 2a and a second arm 2b that are perpendicular to each other. The four first arms 2a are connected to the end of the coil assembly 10, and the four second arms 2b enclose the accommodation space 25.

[0082] Specifically, in one implementation, as Figures 1 to 6 shown, in the embodiment of the present application, the above-mentioned first yoke iron arm 21, second yoke iron arm 22, third yoke iron arm 23 and fourth yoke iron arm 24 are all magnetic conductive parts, and these yoke iron arms can be made of commercially pure iron with a relatively high magnetic permeability. These yoke iron arms can include a first arm 2a and a second arm 2b that are perpendicular to each other. The length of the first arm 2a can be less than that of the second arm 2b, forming an L-shaped magnetic conductive part. An installation hole for connecting with the end of the coil assembly 10 can be opened on the second arm 2b of each yoke iron arm. The length direction of the second arm 2b is parallel to the ±Y direction shown in the figure, and the length direction of the first arm 2a is parallel to the ±X direction shown in the figure.

[0083] Combined with the drawings, it is easy to understand that along the ±X direction, the first yoke arm 21 and the second yoke arm 22 are located at both ends of the coil assembly 10, and the third yoke arm 23 and the fourth yoke arm 24 are located at both ends of the coil assembly 10. Along the ±Y direction, the first arms 2a of the first yoke arm 21 and the first arms 2a of the third yoke arm 23 are arranged at intervals, and the first arms 2a of the second yoke arm 22 and the first arms 2a of the fourth yoke arm 24 are arranged at intervals. Thus, the ends of the four yoke arms enclose an accommodation space 25 for accommodating the armature assembly 30. It can be understood that when the armature assembly 30 rotates within the accommodation space 25, it can respectively contact the first arms 2a at different positions, thereby forming different magnetic circuits.

[0084] Optionally, referring to Figure 2 or Figure 5 , the coil assembly 10 includes a first iron core 101 and a second iron core 102;

[0085] A first winding is wound around the outside of the first iron core 101, a second winding is wound around the outside of the second iron core 102, and the winding directions of the first winding and the second winding are the same;

[0086] The first yoke arm 21 and the second yoke arm 22 are fixed to both ends of the first iron core 101, and the third yoke arm 23 and the fourth yoke arm 24 are fixed to both ends of the second iron core 102.

[0087] Specifically, the coil assembly 10 generally includes a winding and an iron core disposed within the winding. In one embodiment, compared with a conventional coil assembly 10, such as Figure 2 or Figure 5 shown, the coil assembly 10 of the embodiment of the present application includes a first iron core 101 and a second iron core 102. Both the first iron core 101 and the second iron core 102 are in a bar-shaped structure, and the two iron cores are parallel to each other. A coil bracket can be installed on the outside of each iron core, and the two can be connected together by short-circuiting the connection pins of the two windings on the two coil brackets. Exemplarily, the first winding and the second winding can be connected in series.

[0088] Correspondingly, in this coil assembly 10 with a double-iron-core and double-winding structure, the first yoke arm 21 is provided with a mounting hole for connecting to one end of the first iron core 101, the second yoke arm 22 is provided with a mounting hole for connecting to the other end of the first iron core 101, and both ends of the first iron core 101 are respectively inserted into the corresponding mounting holes, and are fixedly connected to the first yoke arm 21 and the second yoke arm 22 through riveting. The first iron core 101, the first yoke arm 21, and the second yoke arm 22 form an approximate U-shaped or C-shaped first frame structure.

[0089] Similarly, mounting holes for connecting to one end of the second iron core 102 are provided on the third yoke iron arm 23, and mounting holes for connecting to the other end of the second iron core 102 are provided on the fourth yoke iron arm 24. Both ends of the second iron core 102 are respectively inserted into the corresponding mounting holes, and are fixedly connected to the third yoke iron arm 23 and the fourth yoke iron arm 24 by riveting. The second iron core 102, the third yoke iron arm 23, and the fourth yoke iron arm 24 form an approximate U-shaped or C-shaped second frame structure.

[0090] For the coil assembly 10 with a double-iron-core and double-winding structure, since the perimeter of one round of winding outside a single iron core becomes shorter, the number of turns increases faster. Therefore, under the same coil length, the number of turns can be increased, and the overall magnetic suction force of the coil assembly 10 can be improved.

[0091] In addition, Figure 11 The magnetic circuit system structure of the coil assembly 10 including three iron cores is also simply illustrated. The three iron cores are respectively the first iron core 101, the second iron core 102, and the third iron core 103. Enameled wires are respectively wound around each iron core to form windings, and the three windings can also be connected in series. Combining the introduction of the foregoing embodiments, it is easy to understand that the coil assembly 10 with such three windings can also improve the magnetic suction force by increasing the number of turns of the coil. At this time, the first yoke iron arm 21 and the second yoke iron arm 22 can be simultaneously fixed to both ends of the first iron core 101 and the second iron core 102, and the third yoke iron arm 23 and the fourth yoke iron arm 24 can be fixed to both ends of the third iron core 103. In such a magnetic circuit system, the windings on the first iron core 101 and the second iron core 102, the first yoke iron arm 21, the armature assembly 30, and the fourth yoke iron arm 24 can form a first magnetic circuit, and the windings on the third iron core 103, the second yoke iron arm 22, the armature assembly 30, and the third yoke iron arm 23 can form a second magnetic circuit.

[0092] Figure 12Also simply illustrated is the magnetic circuit system structure of the coil assembly 10 including four iron cores, namely the first iron core 101, the second iron core 102, the third iron core 103, and the fourth iron core 104. Enameled wires are respectively wound around each iron core to form windings, and the four windings can also be connected in series. Combining the introduction of the foregoing embodiments, it is easy to understand that such a coil assembly 10 with four windings can also improve the magnetic suction force by increasing the number of turns of the coil. At this time, the first yoke arm 21 and the second yoke arm 22 can be simultaneously fixed to both ends of the first iron core 101 and the second iron core 102, and the third yoke arm 23 and the fourth yoke arm 24 can be fixed to both ends of the third iron core 103 and the fourth iron core 104. In such a magnetic circuit system, the windings on the first iron core 101 and the second iron core 102, the first yoke arm 21, the armature assembly 30, and the fourth yoke arm 24 can form a first magnetic circuit, and the windings on the third iron core 103 and the fourth iron core 104, the second yoke arm 22, the armature assembly 30, and the third yoke arm 23 can form a second magnetic circuit.

[0093] For the coil assembly 10 formed by more iron cores and windings, the embodiments of the present application will not be described one by one. It should be noted that when the number of iron cores and the corresponding number of windings are odd, by controlling the number of turns of the coil or the material of the iron core, etc., the magnetic forces of the first magnetic circuit and the second magnetic circuit can be made the same, that is, the magnetic forces for driving the armature assembly 30 to rotate clockwise or counterclockwise are the same.

[0094] Optionally, as Figure 3 or Figure 6 shown, two yoke arms at one end of the two ends of the coil assembly 10 are connected together to keep the corresponding magnetic circuit continuously conducting.

[0095] Specifically, in the magnetic circuit system of the embodiments of the present application, two yoke arms at one end of the two ends of the coil assembly 10 can also be connected together, as Figure 3 or Figure 6 shown, the second yoke arm 22 and the fourth yoke arm 24 can be connected together. Thus, when the coil assembly 10 is powered off, whether it is the first magnetic circuit or the second magnetic circuit, they are both closed and non-disconnected magnetic circuits, and the magnetic suction force can be maintained, so that the magnetic circuit system maintains the operating state when powered on, realizing the magnetic holding function.

[0096] Optionally, referring to Figure 7 or Figure 8 , the axes of the first iron core 101 and the second iron core 102 are parallel to form a first reference plane, and the first reference plane is perpendicular to the rotation axis of the armature assembly 30.

[0097] Specifically, in one implementation manner, as Figure 7 or Figure 8As shown in the figure, the armature assembly 30 is installed in the accommodation space 25, and its rotation axis is parallel to the Z direction. The axes of the first iron core 101 and the second iron core 102 can be parallel to the ±X directions shown in the figure, and the axes of the two can form a first reference plane. At the same time, this first reference plane is also perpendicular to the rotation axis of the armature assembly 30. That is, in Figure 7 or Figure 8 As shown in the figure, the first iron core 101 and the second iron core 102 are arranged flat in a plane parallel to the XOY plane. The electromagnetic assembly 10 with this double-iron-core and double-winding structure can effectively reduce the structural dimensions in the ±Z directions and can be applied to electromagnetic relays and installation and use environments where the space in the ±Z directions is relatively compact.

[0098] Optionally, referring to Figure 7 or Figure 8 the length of the first iron core 101 is less than the length of the second iron core 102;

[0099] Along the length direction of the iron core, the first yoke iron arm 21 and the third yoke iron arm 23 are arranged at intervals, and the second yoke iron arm 22 and the fourth yoke iron arm 24 are arranged at intervals;

[0100] The first yoke iron arm 21 and the third yoke iron arm 23 are simultaneously fixedly connected to the first iron core 101 to keep the corresponding magnetic circuit continuously conducting, or the second yoke iron arm 22 and the fourth yoke iron arm 24 are simultaneously fixedly connected to the first iron core 101 to keep the corresponding magnetic circuit continuously conducting.

[0101] Specifically, in one implementation, when the two iron cores in the coil assembly 10 are arranged at the positions shown in Figure 7 or Figure 8 the length of the first iron core 101 can be designed to be less than the length of the second iron core 102, and one ends of the first iron core 101 and the second iron core 102 are aligned. Correspondingly, there is a length difference with a staggered arrangement at the other ends of the first iron core 101 and the second iron core 102. The second iron core 102, the third yoke iron arm 23, and the fourth yoke iron arm 24 enclose the first iron core 101, the first yoke iron arm 21, and the second yoke iron arm 22 inside. Thus, a more compact structural design of the magnetic circuit system can be achieved, and the structural dimensions of the magnetic circuit system can be further reduced to facilitate the miniaturization and small-size design of the electromagnetic relay.

[0102] When the two iron cores in the coil assembly 10 are arranged at the positions shown in Figure 7 or Figure 8When arranged in the indicated position, along the length direction of any iron core (i.e., the ±X direction shown in the figure), since the length of the first iron core 101 is shorter, after fixing the first yoke arm 21 to the end of the first iron core 101 and fixing the third yoke arm 23 to the end of the second iron core 102, the gap between the first yoke arm 21 and the third yoke arm 23 causes them to be separated from each other. And, since the other ends of the first iron core 101 and the second iron core 102 are arranged in an aligned structure, therefore, in addition to being fixed to the second yoke arm 22, the first iron core 101 also passes through the mounting hole on the second yoke arm 22 and is fixed to the fourth yoke arm 24.

[0103] Combined with Figure 7 or Figure 8 As shown, the structural form in which the second yoke arm 22 and the fourth yoke arm 24 are simultaneously fixedly connected to the first iron core 101 can cause the magnetic circuit system to maintain a closed magnetic circuit both in the first magnetic circuit and the second magnetic circuit after the coil assembly 10 in the magnetic circuit system is powered off, and can maintain the armature assembly 30 in Figure 7 or Figure 8 the indicated magnetic attraction contact state, that is, the electromagnetic relay can maintain a closed or open state under the action of the corresponding first magnetic circuit or second magnetic circuit.

[0104] In addition, it should be noted that in some embodiments, the above magnetic circuit system can also be designed such that the second yoke arm 22 and the fourth yoke arm 24 are arranged at intervals, and the first yoke arm 21 and the third yoke arm 23 are simultaneously fixedly connected to the second iron core 102. This magnetic circuit system has the same advantages as the above magnetic circuit system and will not be elaborated in the embodiments of the present application.

[0105] Optionally, referring to Figure 9 or Figure 10 , the axes of the first iron core 101 and the second iron core 102 are parallel to form a second reference plane, and the second reference plane is parallel to the rotation axis of the armature assembly 30.

[0106] Specifically, in one embodiment, as Figure 9 or Figure 10 shown, the armature assembly 30 is installed in the accommodation space 25, and its rotation axis is parallel to the ±Z direction. The axes of the first iron core 101 and the second iron core 102 can be parallel to the ±X direction shown in the figure, and the axes of the two can form a second reference plane. At the same time, the second reference plane is also parallel to the rotation axis of the armature assembly 30. That is, in Figure 9 or Figure 10In the schematic diagram, the first iron core 101 and the second iron core 102 are stacked in the ±Z direction in a plane parallel to the XOZ plane. The electromagnetic component 10 with this double-iron-core and double-winding structure can effectively reduce the structural size in the XOY plane and is applicable to electromagnetic relays and installation environments with a relatively compact space in the XOZ plane.

[0107] Optionally, referring to Figure 9 or Figure 10 , the length of the first iron core 101 is equal to the length of the second iron core 102;

[0108] Along the rotation axis direction of the armature assembly 30, the first yoke arm 21 and the third yoke arm 23 are arranged at intervals, and the second yoke arm 22 and the fourth yoke arm 24 are connected as a whole to keep the corresponding magnetic circuit continuously conducting; or,

[0109] Along the rotation axis direction of the armature assembly 30, the second yoke arm 22 and the fourth yoke arm 24 are arranged at intervals; the first yoke arm 21 and the third yoke arm 23 are connected as a whole to keep the corresponding magnetic circuit continuously conducting.

[0110] Specifically, in one implementation, when the two iron cores in the coil assembly 10 are arranged according to Figure 9 or Figure 10 the positions shown in the schematic diagram, the length of the first iron core 101 can be designed to be equal to the length of the second iron core 102, and the two ends of the first iron core 101 and the second iron core 102 are aligned. Correspondingly, the first yoke arm 21 and the third yoke arm 23 at the same end of the first iron core 101 and the second iron core 102 are stacked in the ±Z direction, and the second yoke arm 22 and the fourth yoke arm 24 at the same end of the first iron core 101 and the second iron core 102 are stacked in the ±Z direction. Similar to the schematic diagram of Figure 7 or Figure 8 , Figure 9 or Figure 10 shows another compact magnetic circuit system, which can also further reduce the structural size of the magnetic circuit system to facilitate the miniaturization and small-size design of the electromagnetic relay.

[0111] When the two iron cores in the coil assembly 10 are arranged according to Figure 9 or Figure 10When arranged in the schematic positions, along the length direction of any iron core (i.e., the ±X direction shown in the figure), since the first iron core 101 and the second iron core 102 are of the same length and aligned. Therefore, along the ±Z direction shown in the figure, when the first yoke arm 21 and the third yoke arm 23 are stacked, a preset distance can be provided, and this preset distance only needs to separate the first yoke arm 21 and the third yoke arm 23 from each other. When the second yoke arm 22 and the fourth yoke arm 24 are stacked, they can be integrated. Specifically, during manufacturing, a metal piece can be used and formed into the integrally connected second yoke arm 22 and fourth yoke arm 24 through cutting and bending.

[0112] Combined with Figure 9 or Figure 10 In the schematic, the structural form in which the second yoke arm 22 and the fourth yoke arm 24 are integrated can enable, after the electromagnetic component 10 in this magnetic circuit system is powered off, whether it is the first magnetic circuit or the second magnetic circuit, to remain a closed circuit, and can maintain the armature component 30 in Figure 9 or Figure 10 the magnetic attraction contact state shown in the schematic, that is, under the action of the corresponding first magnetic circuit or second magnetic circuit of the electromagnetic relay, it can maintain the closed or open state.

[0113] In addition, it should be noted that in some embodiments, the above magnetic circuit system can also be designed such that the second yoke arm 22 and the fourth yoke arm 24 are separated by a preset distance, and the first yoke arm 21 and the third yoke arm 23 are integrated. This magnetic circuit system has the same advantages as the above magnetic circuit system, and will not be elaborated in the embodiments of this application.

[0114] Optionally, both ends of the first winding extend to form a first pin and a second pin, and both ends of the second winding extend to form a third pin and a fourth pin;

[0115] The second pin and the third pin are electrically connected to connect the first winding and the second winding, and the first pin and the fourth pin are used to receive a low-voltage control signal.

[0116] Specifically, in the embodiments of the present application, the aforementioned first winding and second winding may be windings formed by respectively winding two coils of enameled wires. After one coil of enameled wire is wound to form the first winding, the two ends extending out are respectively the first pin and the second pin. After the other coil of enameled wire is wound to form the second winding, the two ends extending out are respectively the third pin and the fourth pin. The second pin and the third pin can be welded or short-circuited through a connector, so as to connect the first winding and the second winding in series. The remaining first pin and fourth pin are used as the pins of the coil assembly exposed outside, for connecting to a control device and receiving a low-voltage control signal sent from the control device. In addition, it should be noted that the winding helix directions of the enameled wires on the first winding and the second winding are the same, so as to ensure that the magnetic force directions generated after the two windings are energized are the same, enhance the magnetic force, and avoid magnetic force cancellation and attenuation.

[0117] Optionally, referring to Figure 13 , the armature assembly 30 includes a first armature 301, a second armature 302 and a permanent magnet;

[0118] The first armature 301 and the second armature 302 are arranged in parallel at intervals, and the permanent magnet is clamped between the first armature 301 and the second armature 302;

[0119] Both ends of the first armature 301 are first magnetic poles with the same polarity, both ends of the second armature 302 are second magnetic poles with the same polarity, and the polarities of the first magnetic pole and the second magnetic pole are opposite.

[0120] Specifically, regardless of whether the magnetic circuit system adopts the Figure 7 , Figure 8 -schematic structure or Figure 9 , Figure 10 -schematic structure, as Figure 13 -schematic shows, the armature assembly 30 may include a first armature 301, a second armature 302 and a permanent magnet (not shown in the figure). Specifically, the first armature 301 and the second armature 302 may be bar-shaped magnetic conductive members, and the two armatures can be integrally injection-molded with the permanent magnet and the plastic housing or bracket wrapping the permanent magnet. Under the magnetization of the permanent magnet, the first armature 301 and the second armature 302 can form different magnetic poles. For example, as Figures 7 to 10 -schematic shows, along the ±X direction, both ends of the first armature 301 are N poles, and both ends of the second armature 3012 are S poles.

[0121] Combined with Figures 7 to 10As shown, it is easy to understand that the force acting on one end of the first armature 301 is an attractive force, and the force acting on the same end of the second armature 30 is a repulsive force. At the same time, the force acting on the other end of the first armature 301 is a repulsive force, and the force acting on the same end of the second armature 30 is an attractive force. That is, in the figure, along the Y direction, one side on the left and right is an attractive force, and the other side is a repulsive force, thus forming a torque to drive the armature assembly 30 to rotate.

[0122] Optionally, at least two windings in the coil assembly 10 are connected in series.

[0123] Specifically, in some embodiments, when there are no less than two windings in the coil assembly 10, these windings can be electrically connected in series with each other. It is easy to understand that when the working voltage remains unchanged, connecting at least two windings in series is beneficial to reducing the power consumption of the entire coil assembly 10, can reduce the consumption of electrical energy, the product is more energy-saving, and the use cost is lower.

[0124] This application also provides an electromagnetic relay, including the magnetic circuit system disclosed in any one of the foregoing embodiments of this application.

[0125] In the embodiments of this application, the above magnetic circuit system and other modules such as the contact system can form an electromagnetic relay. Based on the advantages of the above magnetic circuit system, the electromagnetic relay in the embodiments of this application has less magnetic interference, higher magnetic utilization rate, stronger magnetic force, and higher working sensitivity.

[0126] Optionally, referring to Figures 1 to 4 , the electromagnetic relay further includes a push rod 40, a moving contact assembly 41, and a stationary contact assembly 42;

[0127] One end of the armature assembly 30 is connected to one end of the push rod 40, and the other end of the push rod 40 is connected to the moving contact assembly 41; the stationary contact assembly 42 is disposed opposite to the moving contact assembly 41, and the moving contact assembly 41 can be close to or away from the stationary contact assembly 42 to maintain a contact or disconnection state;

[0128] When forming the first magnetic circuit, the stationary contact assembly 42 and the moving contact assembly 41 maintain one of the contact or disconnection states; when forming the second magnetic circuit, the stationary contact assembly 42 and the moving contact assembly 41 maintain the other of the contact or disconnection states.

[0129] Specifically, as shown in Figures 1 to 4 , the contact system of the electromagnetic relay in the embodiments of this application can include a moving contact assembly 41 and a stationary contact assembly 42.

[0130] The moving spring assembly 41 may include a moving contact 411, a moving spring piece 412, and a moving spring lead piece 413. The moving spring lead piece 413 may be a rigid structure for installing and fixing the elastic moving spring piece 412. At the same time, the moving spring lead piece 413 is also used to form a terminal exposed outside the relay. The moving contact 411 may be disposed on the surface of the moving spring piece 412, and the push rod 40 is connected to the moving spring piece 412. The static spring assembly 42 may include a static contact 421 and a static spring lead piece 422. The static spring lead piece 422 may be a rigid structure for forming a terminal exposed outside the relay. The static contact 421 may be disposed on the surface of the static spring lead piece 422.

[0131] The push rod 40 may be disposed along the ±X directions shown in the figure. One end of the push rod 40 is connected to the moving spring piece 412, and the other end is connected to the armature assembly 30. For example, a push arm is protrudingly provided on the side of the plastic bracket of the armature assembly 30, and the push arm is inserted into the mounting portion at the other end of the push rod 40. When the armature assembly 30 rotates, the push rod 40 can be driven to move along the ±X directions by the push arm.

[0132] As Figure 7 or Figure 9 shown in the figure, when the armature assembly 30 rotates clockwise, the push arm drives the push rod 40 to move along the -X direction, and the push rod 40 pushes the moving spring piece 412 to move upward, so that the moving contact 411 approaches the static contact 421. After the two are in contact, the relay is in a conducting state. As Figure 8 or Figure 10 shown in the figure, when the armature assembly 30 rotates counterclockwise, the push arm drives the push rod 40 to move along the +X direction, and the push rod 40 pushes the moving spring piece 412 to move downward, so that the moving contact 411 moves away from the static contact 421. After the two are separated, the relay is in an open state.

[0133] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without more limitations, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that 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 a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0134] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific implementation manners. The above specific implementation manners are merely illustrative rather than restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. A magnetic circuit system, characterized in that: The magnetic circuit system comprises a coil assembly, a first yoke arm, a second yoke arm, a third yoke arm, a fourth yoke arm and an armature assembly, wherein the coil assembly comprises at least two windings; The first yoke arm and the second yoke arm are connected to opposite ends of the coil assembly, the third yoke arm and the fourth yoke arm are connected to opposite ends of the coil assembly, and the first yoke arm and the third yoke arm are located at the same end, and the second yoke arm and the fourth yoke arm are located at the same end; When the armature assembly overlaps with the first yoke arm, one of the third yoke arm, and one of the second yoke arm and the fourth yoke arm, the magnetic circuit system has a first magnetic circuit; When the armature assembly is overlapped with the first yoke arm, the other of the third yoke arm, and the other of the second yoke arm and the fourth yoke arm, the magnetic circuit system has a second magnetic circuit.

2. The magnetic circuit system according to claim 1, characterized in that: When the armature assembly overlaps the first yoke arm and the fourth yoke arm, the magnetic circuit system has a first magnetic circuit; or, When the armature assembly overlaps the second yoke arm and the third yoke arm, the magnetic circuit system has a second magnetic circuit.

3. The magnetic circuit system according to claim 1, characterized in that: The first yoke arm, the second yoke arm, the third yoke arm and the fourth yoke arm form a receiving space, and the armature assembly is rotatably disposed in the receiving space; When the armature assembly rotates to the first position, the armature assembly overlaps the first yoke arm and the fourth yoke arm; When the armature assembly rotates to the second position, the armature assembly overlaps the second yoke arm and the third yoke arm.

4. The magnetic circuit system according to claim 3, characterized in that: The first yoke arm, the second yoke arm, the third yoke arm and the fourth yoke arm are all L-shaped, including a first arm and a second arm perpendicular to each other, four second arms are connected to the ends of the coil assembly, and four first arms surround the accommodating space.

5. The magnetic circuit system according to any one of claims 1 to 4, characterized in that: The coil assembly includes a first core and a second core; A first winding is wound on the outside of the first iron core, and a second winding is wound on the outside of the second iron core, and the first winding and the second winding have the same winding direction; The first yoke arm and the second yoke arm are fixed to two ends of the first core, and the third yoke arm and the fourth yoke arm are fixed to two ends of the second core.

6. The magnetic circuit system according to claim 5, characterized in that: Two yoke arms located at one end of the coil assembly are connected together to keep the corresponding magnetic circuit continuously conductive.

7. The magnetic circuit system according to claim 6, characterized in that: The axes of the first iron core and the second iron core are parallel to form a first reference plane, and the first reference plane is perpendicular to the rotation axis of the armature assembly.

8. The magnetic circuit system according to claim 7, characterized in that: The length of the first core is smaller than the length of the second core; Along the length direction of the iron core, the first yoke arm and the third yoke arm are arranged at intervals, and the second yoke arm and the fourth yoke arm are arranged at intervals; The first yoke arm and the third yoke arm are fixedly connected to the first core at the same time so that the corresponding magnetic circuit is continuously conductive, or the second yoke arm and the fourth yoke arm are fixedly connected to the first core at the same time so that the corresponding magnetic circuit is continuously conductive.

9. The magnetic circuit system according to claim 6, characterized in that: The axes of the first iron core and the second iron core are parallel to form a second reference plane, and the second reference plane is parallel to the rotation axis of the armature assembly.

10. The magnetic circuit system according to claim 9, characterized in that: The length of the first core is equal to the length of the second core; Along the rotation axis direction of the armature assembly, the first yoke arm and the third yoke arm are arranged at intervals; the second yoke arm and the fourth yoke arm are connected as a whole so that the corresponding magnetic circuit is continuously conductive; or, Along the rotation axis direction of the armature assembly, the second yoke arm and the fourth yoke arm are arranged at intervals; the first yoke arm and the third yoke arm are connected as a whole so that the corresponding magnetic circuit is continuously conductive.

11. The magnetic circuit system according to claim 6, characterized in that: Two ends of the first winding extend to form a first pin and a second pin, and two ends of the second winding extend to form a third pin and a fourth pin; The second pin and the third pin are electrically connected to connect the first winding with the second winding, and the first pin and the fourth pin are used to receive a low voltage control signal.

12. The magnetic circuit system according to claim 1, characterized in that: The armature assembly includes a first armature, a second armature and a permanent magnet; The first armature and the second armature are arranged in parallel and spaced apart, and the permanent magnet is sandwiched between the first armature and the second armature; Two ends of the first armature are first magnetic poles with the same polarity, and two ends of the second armature are second magnetic poles with the same polarity. The polarities of the first magnetic pole and the second magnetic pole are opposite.

13. The magnetic circuit system according to claim 1, characterized in that: At least two windings in the coil assembly are connected in series.

14. An electromagnetic relay, characterized in that: Comprising the magnetic circuit system according to any one of claims 1 to 13.

15. The electromagnetic relay according to claim 14, characterized in that: Also includes a push rod, a dynamic spring assembly and a static spring assembly; The armature assembly is connected to one end of the push rod, and the dynamic spring assembly is connected to the other end of the push rod; the static spring assembly is arranged opposite to the dynamic spring assembly, and the dynamic spring assembly can be close to or away from the static spring assembly to maintain a contact or disconnection state; When forming the first magnetic circuit, the static spring assembly and the dynamic spring assembly remain in one state of contact or disconnection; when forming the second magnetic circuit, the static spring assembly and the dynamic spring assembly remain in another state of contact or disconnection.

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