Magnetic circuit system and electromagnetic relay

Abstract

The present application 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. The coil assembly comprises at least two windings. The first yoke arm and the second yoke arm are connected to 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 mated with one of the first yoke arm and the third yoke arm and one of the second yoke arm and the fourth yoke arm, a first magnetic loop is established in the magnetic circuit system; and when the armature assembly is mated 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, a second magnetic loop is established in the magnetic circuit system. The present application can reduce magnetic flux loss, improve the utilization rate of magnetic energy, enhance electromagnetic attraction, and improve operation sensitivity.

Description

Magnetic circuit system and electromagnetic relay

[0001] The present application claims priority to the Chinese patent application No. 202410986007.9, filed on July 22, 2024, and entitled "Magnetic circuit system and electromagnetic relay", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application belongs to the technical field of relays, and particularly relates to a magnetic circuit system and an electromagnetic relay. BACKGROUND

[0003] In the electrical engineering industry, electromagnetic relays are widely used as a kind of control device, which has a control system (also known as an input loop) and a controlled system (also known as an output loop), and is usually applied in automatic control circuits. The relay is actually a kind of "automatic switch" that uses a small current to control a large current. Therefore, it plays a role in automatic regulation, safety protection, and conversion of circuits.

[0004] The magnetic latching relay is a kind of electromagnetic relay. In the existing electromagnetic relay, the magnetic field generated by the coil assembly of the magnetic circuit system is prone to mutual interference when working, which reduces the magnetic flux and further leads to low magnetic efficiency.

[0005] SUMMARY

[0006] The purpose of the embodiments of the present application is to provide a magnetic circuit system and an electromagnetic relay, which can solve the problem that the existing magnetic circuit system is prone to mutual interference, which reduces the magnetic flux and further leads to low magnetic efficiency.

[0007] In order to solve the above technical problems, the present application is implemented as follows:

[0008] In a first aspect, the embodiments of the present application provide a magnetic circuit system, which 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.

[0009] 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.

[0010] 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.

[0011] When the armature assembly is lapped 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 has a second magnetic loop.

[0012] 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 loop; or,

[0013] When the armature assembly is lapped with the second yoke arm and the third yoke arm, the magnetic circuit system has a second magnetic loop.

[0014] Optionally, the first yoke arm, the second yoke arm, the third yoke arm and the fourth yoke arm enclose a receiving space, and the armature assembly is rotatably arranged in the receiving space.

[0015] When the armature assembly is rotated to a first position, the armature assembly is lapped with the first yoke arm and the fourth yoke arm.

[0016] When the armature assembly is rotated to a second position, the armature assembly is lapped with the first yoke arm and the fourth yoke arm.

[0017] Optionally, the first yoke arm, the second yoke arm, the third yoke arm and the fourth yoke arm are all L-shaped, each 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 enclose the receiving space.

[0018] Optionally, the coil assembly includes a first core and a second core.

[0019] An outer portion of the first core is wound with a first winding, an outer portion of the second core is wound with a second winding, and the first winding and the second winding have the same winding direction.

[0020] 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.

[0021] Optionally, two yoke arms at one end of the coil assembly are connected together to make the corresponding magnetic loop continuously conductive.

[0022] Optionally, the first core and the second core have axes parallel to form a first reference surface, and the first reference surface is perpendicular to the rotation axis of the armature assembly.

[0023] Optionally, the length of the first core is less than the length of the second core.

[0024] The first yoke arm and the third yoke arm are spaced apart along the length direction of the iron core, and the second yoke arm and the fourth yoke arm are spaced apart.

[0025] The first yoke arm and the third yoke arm are fixedly connected with the first iron core at the same time to continuously conduct the corresponding magnetic circuit, or the second yoke arm and the fourth yoke arm are fixedly connected with the first iron core at the same time to continuously conduct the corresponding magnetic circuit.

[0026] Optionally, the axes of the first iron core and the second iron core are parallel to form a second reference surface, and the second reference surface is parallel to the rotation axis of the armature assembly.

[0027] Optionally, the length of the first iron core is equal to the length of the second iron core.

[0028] The first yoke arm and the third yoke arm are spaced apart along the rotation axis direction of the armature assembly; the second yoke arm and the fourth yoke arm are integrated to continuously conduct the corresponding magnetic circuit; or,

[0029] The second yoke arm and the fourth yoke arm are spaced apart along the rotation axis direction of the armature assembly; the first yoke arm and the third yoke arm are integrated to continuously conduct the corresponding magnetic circuit.

[0030] Optionally, the two ends of the first winding extend to form a first pin and a second pin, and the two ends of the second winding extend to form a third pin and a fourth pin.

[0031] 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 for receiving a low-voltage control signal.

[0032] Optionally, the armature assembly comprises a first armature, a second armature and a permanent magnet.

[0033] The first armature and the second armature are spaced apart in parallel, and the permanent magnet is clamped between the first armature and the second armature.

[0034] The two ends of the first armature are first magnetic poles of the same polarity, the two ends of the second armature are second magnetic poles of the same polarity, and the polarities of the first magnetic poles and the second magnetic poles are opposite.

[0035] Optionally, at least two windings in the coil assembly are connected in series.

[0036] In a second aspect, the application further provides an electromagnetic relay comprising the magnetic circuit system as described in the first aspect of the application.

[0037] Optionally, the electromagnetic relay further comprises a push rod, a moving spring assembly and a static spring assembly.

[0038] The armature assembly is connected to one end of the push rod, and the moving spring assembly is connected to the other end of the push rod; the static spring assembly is arranged opposite to the moving spring assembly, and the moving spring assembly can keep in contact or disconnection with the static spring assembly.

[0039] In the formation of the first magnetic circuit, the static spring assembly and the moving spring assembly keep in one of the contact or disconnection state; in the formation of the second magnetic circuit, the static spring assembly and the moving spring assembly keep in the other of the contact or disconnection state.

[0040] In the embodiments of the present application, two yoke arms are respectively fixed at both ends of the coil assembly, and the coil assembly, the armature assembly and the two yoke 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 arms at both ends of the coil assembly can form another magnetic circuit. At different time, the 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 improve the electromagnetic suction force and improve the action sensitivity of the armature assembly, so that it can respond quickly.

[0041] In addition, the magnetic circuit system of other embodiments of the present application also has the following advantages: 1) when the two yoke arms at any one end of the coil assembly are connected together, the coil assembly can keep as a closed magnetic circuit after being powered off in the magnetic circuit system, regardless of the first magnetic circuit or the second magnetic circuit. 2) When two cores and two windings are used, the reference surfaces formed by the two cores can be parallel or perpendicular to the rotating shaft of the armature assembly, thereby meeting the requirements of small installation size and volume in different use environments. 3) The four yoke arms of the L-shaped yoke arms enclose a space for placing the armature assembly, which also helps to design the magnetic circuit system to be more compact and portable. BRIEF DESCRIPTION OF DRAWINGS

[0042] FIG. 1 is an axonometric view of a first electromagnetic relay according to an embodiment of the present application;

[0043] FIG. 2 is a schematic view of FIG. 1 in the -Z direction according to an embodiment of the present application;

[0044] FIG. 3 is an exploded view of the magnetic circuit system in FIG. 1 according to an embodiment of the present application;

[0045] FIG. 4 is an axonometric view of a second electromagnetic relay according to an embodiment of the present application;

[0046] FIG. 5 is a schematic view of FIG. 4 in the -Z direction according to an embodiment of the present application;

[0047] FIG. 6 is an exploded view of the magnetic circuit system in FIG. 4 according to an embodiment of the present application;

[0048] Fig. 7 is a schematic view of the electromagnetic relay of Fig. 1 in a closed state according to an embodiment of the present application;

[0049] Fig. 8 is a schematic view of the electromagnetic relay of Fig. 1 in an open state according to an embodiment of the present application;

[0050] Fig. 9 is a schematic view of the electromagnetic relay of Fig. 4 in a closed state according to an embodiment of the present application;

[0051] Fig. 10 is a schematic view of the electromagnetic relay of Fig. 4 in an open state according to an embodiment of the present application;

[0052] Fig. 11 is a simplified schematic view of another magnetic circuit system according to an embodiment of the present application;

[0053] Fig. 12 is a simplified schematic view of another magnetic circuit system according to an embodiment of the present application;

[0054] Fig. 13 is a plan view of an armature assembly according to an embodiment of the present application.

[0055] Reference numerals: Coil assembly - 10, first yoke arm - 21, second yoke arm - 22, third yoke arm - 23, fourth yoke arm - 24, first arm - 2a, second arm - 2b, accommodating space - 25, armature assembly - 30, rotating shaft - 31, push rod - 40, moving spring assembly - 41, stationary spring assembly - 42, first armature - 301, second armature - 302, moving contact - 411, moving spring leaf - 412, moving spring lead-out leaf - 413, stationary contact - 421, stationary spring lead-out leaf - 422. DETAILED DESCRIPTION

[0056] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0057] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a particular order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally means that the front and rear associated objects are in an "or" relationship.

[0058] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0059] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] The magnetic circuit system and the electromagnetic relay provided by the embodiments of the present application will be described in detail below in combination with the drawings and specific examples and their application scenarios.

[0061] Referring to FIGS. 1-6, a structural schematic diagram of a magnetic circuit system according to an embodiment of the present application is shown, which 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, wherein the coil assembly 10 comprises at least two windings;

[0062] 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;

[0063] When the armature assembly 30 is lapped 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;

[0064] When the armature assembly 30 is lapped 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.

[0065] The magnetic circuit system of the embodiments of the present application is a kind of magnetic circuit system used in electromagnetic relay, such as the schematic of different structures of magnetic circuit system shown in FIG. 1 to FIG. 6, which have the following commonalities: the magnetic circuit system includes 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 embodiments of the present application, the coil assembly 10 includes at least two windings, and the coil assembly 10 of this structure is improved from a traditional single winding to two or more windings. Therefore, when the corresponding winding is formed by winding enameled wire, the winding length is shortened and the number of turns is increased faster. Thus, under the same coil length, the number of turns in the winding is more, which can improve the magnetic attraction of the coil assembly 10. In the embodiments of the present application, in order to avoid the interference of the magnetic field formed by different windings and prevent the reduction of magnetic attraction, the number and position of the yoke arms in the magnetic circuit system are also improved accordingly.

[0066] In combination with the schematic of FIG. 1 or FIG. 4, the first yoke arm 21 and the third yoke arm 23 are fixedly installed 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 fixedly installed at one end of the electromagnetic assembly 10 along the +X direction. In combination with the schematic of FIG. 2 and FIG. 5, the first yoke arm 21 and the second yoke arm 22 are oppositely arranged along the ±X direction, and the third yoke arm 23 and the fourth yoke arm 24 are oppositely arranged along the ±X direction. The armature assembly 30 is connected with the rotating shaft 31, one end of the rotating shaft 31 is rotatably connected with the support structure (not shown in the figure) of the electromagnetic relay, and the other end of the rotating shaft 31 is rotatably connected with the base structure (not shown in the figure) of the electromagnetic relay. Thus, the armature assembly 30 can rotate relative to each yoke arm.

[0067] The coil assembly 10 is used to generate a magnetic field in the magnetic circuit system. When the coil assembly 10 is energized, each yoke arm is magnetized to generate a magnetic force, and under the action of the magnetic force, the armature assembly 30 can rotate around the rotating shaft 31 in different directions, respectively. When the armature assembly 30 contacts one yoke arm at one end of the +X direction and the -X direction, respectively, different magnetic circuits are formed correspondingly. It should be noted that the rotating direction of the armature assembly 30 changes with the direction of the magnetic force of the yoke arm, the magnetic force of the yoke arm changes with the magnetic field of the coil assembly 10, and the magnetic field of the coil assembly 10 changes with the direction of the voltage in the coil assembly 10. The basic theory of electromagnetic induction principle is not described in detail in the embodiments of the present application.

[0068] Specifically, after the armature assembly 30 rotates, the armature assembly 30 is overlapped with one of the yoke arms at each end of the coil assembly 10, at which time the magnetic circuit system forms a corresponding magnetic circuit. In combination with the schematic of FIG. 2, when the armature assembly 30 is overlapped with one of the first yoke arm 21 and the third yoke arm 23 located in the -X direction, and also overlapped with one of the second yoke arm 22 and the fourth yoke arm 24 located in the +X direction, the magnetic circuit system has a first magnetic circuit.

[0069] When the armature assembly 30 is in contact with the other one of the first yoke arm 21 and the third yoke arm 23 in the -X direction, and is also in contact with the other one of the second yoke arm 22 and the fourth yoke arm 24 in the +X direction, the magnetic circuit system has a second magnetic circuit.

[0070] It can be understood that, no matter the first magnetic circuit or the second magnetic circuit, it is a magnetic circuit formed by the core in the coil assembly 10 and the two yoke arms at both ends of the coil assembly 10. Since the armature assembly 30 is in contact with the yoke arms at different positions at different times, the first magnetic circuit and the second magnetic circuit can be formed at different times, and there is no interference.

[0071] Therefore, in the magnetic circuit system of the embodiment of the present application, two yoke arms are respectively fixed at both ends of the coil assembly 10, and one armature assembly 30 cooperates with the two yoke arms at both ends of the coil assembly 10 to form corresponding magnetic circuits. Thus, the core in the coil assembly 10, the armature assembly 30, and the two yoke arms at both ends of the coil assembly 10 can form one magnetic circuit, and the core in the coil assembly 10, the armature assembly 30, and the other two yoke arms at both ends of the coil assembly 10 can form another magnetic circuit. At different times, the 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 improve the electromagnetic suction force, improve the action sensitivity of the armature assembly 30, and make it respond quickly.

[0072] Optionally, referring to FIGS. 7-10, when the armature assembly 30 is in contact with the first yoke arm 21 and the fourth yoke arm 24, the magnetic circuit system has a first magnetic circuit; or,

[0073] When the armature assembly 30 is in contact with the second yoke arm 22 and the third yoke arm 23, the magnetic circuit system has a second magnetic circuit.

[0074] Specifically, in some embodiments, as shown in FIG. 7 or FIG. 9, one end of the armature assembly 30 can be in contact 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 in contact with the fourth yoke arm 21 at the other end of the coil assembly 10. At this time, the core in the coil assembly 10, the armature assembly 30, and the first yoke arm 21 and the fourth yoke arm 24 can form a first magnetic circuit. As shown in FIG. 8 or FIG. 10, at another time, when the position of the armature assembly 30 changes, one end of the armature assembly 30 can be in contact 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 in contact with the third yoke arm 23 at the other end of the coil assembly 10. At this time, the core in the coil assembly 10, the armature assembly 30, and the second yoke arm 22 and the third yoke arm 23 can form a second magnetic circuit.

[0075] It should be noted that in conjunction with the drawings, at any time, the two yoke arms that are in contact with the armature assembly 30 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 both sides of the armature assembly 30, and the second yoke arm 22 and the third yoke arm 23 are distributed on both sides of the armature assembly 30. Thus, it is convenient to provide installation space for the armature assembly 30.

[0076] Alternatively, referring to FIGS. 7-10, the first yoke arm 21, the second yoke arm 22, the third yoke arm 23, and the fourth yoke arm 24 form an accommodation space 25, and the armature assembly 30 is rotatably arranged in the accommodation space 25;

[0077] When the armature assembly 30 rotates to the first position, the armature assembly 30 is in contact with the first yoke arm 21 and the fourth yoke arm 24;

[0078] When the armature assembly 30 rotates to the second position, the armature assembly 30 is in contact with the first yoke arm 21 and the fourth yoke arm 24.

[0079] Specifically, as shown in FIGS. 7 or 9, the four yoke arms form an accommodation space 25 at the positions where they extend from the two ends of the coil assembly 10, and the armature assembly 30 is arranged in the accommodation space 25, and the ends of the four yoke arms are located at the four corners of the armature assembly 30. In the magnetic circuit system with such a structure, rotating the armature assembly 30 in two opposite directions can form two different magnetic circuits.

[0080] As shown in FIGS. 7 or 9, when the armature assembly 30 rotates clockwise around the rotation shaft 31 to the first position shown in the figure, in the -X direction, the armature assembly 30 is in contact with the first yoke arm 21, and in the +X direction, the armature assembly 30 is in contact with the fourth yoke arm 24, thereby forming the first magnetic circuit shown by the dashed line in FIGS. 7 or 9. As shown in FIGS. 8 or 10, when the armature assembly 30 rotates counterclockwise around the rotation shaft 31 to the second position shown in the figure, in the -X direction, the armature assembly 30 is in contact with the third yoke arm 23, and in the +X direction, the armature assembly 30 is in contact with the second yoke arm 22, thereby forming the second magnetic circuit shown by the dashed line in FIGS. 8 or 10.

[0081] Such a layout structure of installing the armature assembly 30 in the space surrounded by the four yoke arms has higher integration, which is conducive to making the size of the magnetic circuit system smaller and facilitating the development and design of product miniaturization.

[0082] Optionally, referring to FIGS. 1-6, the first yoke arms 21, the second yoke arms 22, the third yoke arms 23 and the fourth yoke arms 24 are all L-shaped, including first arms 2a and second arms 2b perpendicular to each other, the four first arms 2a are connected to the ends of the coil assembly 10, and the four second arms 2b enclose the accommodating space 25.

[0083] Specifically, in some embodiments, as shown in FIGS. 1-6, the first yoke arms 21, the second yoke arms 22, the third yoke arms 23 and the fourth yoke arms 24 are all magnetic conductive members, which can be made of electrical pure iron with high magnetic permeability. The yoke arms can include first arms 2a and second arms 2b perpendicular to each other, the length of the first arms 2a can be smaller than that of the second arms 2b, forming L-shaped magnetic conductive members. The second arms 2b of each yoke arm can be provided with mounting holes connected to the ends of the coil assembly 10, the length direction of the second arms 2b is parallel to the +Y direction shown in the figure, and the length direction of the first arms 2a is parallel to the +X direction shown in the figure.

[0084] As shown in the figure, along the +X direction, the first yoke arms 21 and the second yoke arms 22 are located at the two ends of the coil assembly 10, and the third yoke arms 23 and the fourth yoke arms 24 are located at the two ends of the coil assembly 10. Along the +Y direction, the first arms 2a of the first yoke arms 21 and the third yoke arms 23 are arranged at intervals, and the first arms 2a of the second yoke arms 22 and the fourth yoke arms 24 are arranged at intervals. Thus, the ends of the four yoke arms enclose the accommodating space 25 for accommodating the armature assembly 30. It can be understood that when the armature assembly 30 rotates in the accommodating space 25, it can contact the first arms 2a at different positions, thereby forming different magnetic circuits.

[0085] Optionally, referring to FIG. 2 or FIG. 5, the coil assembly 10 includes a first core 101 and a second core 102;

[0086] The first core 101 is externally wound with a first winding, and the second core 102 is externally wound with a second winding, the winding directions of the first winding and the second winding are the same;

[0087] The first yoke arms 21 and the second yoke arms 22 are fixed to the two ends of the first core 101, and the third yoke arms 23 and the fourth yoke arms 24 are fixed to the two ends of the second core 102.

[0088] Specifically, the coil assembly 10 typically includes windings and an iron core passing through the windings. In some embodiments, compared to a conventional coil assembly 10, as shown in FIG2 or FIG5, the coil assembly 10 of this application embodiment 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 rod-shaped structures, parallel to each other. A coil support can be mounted on the outside of each iron core, and the two coils can be connected together by short-circuiting the connection pins of the two windings on the two coil supports. Exemplarily, the first winding and the second winding can be connected in series.

[0089] Correspondingly, in this coil assembly 10 with a double core and double winding structure, the first yoke arm 21 has a mounting hole for connecting to one end of the first core 101, and the second yoke arm 22 has a mounting hole for connecting to the other end of the first core 101. The two ends of the first core 101 are each inserted into the corresponding mounting holes, and a fixed connection is achieved with the first yoke arm 21 and the second yoke arm 22 by riveting. The first core 101, the first yoke arm 21, and the second yoke arm 22 form a first frame structure that is approximately U-shaped or C-shaped.

[0090] Similarly, the third yoke arm 23 has a mounting hole for connecting to one end of the second iron core 102, and the fourth yoke arm 24 has a mounting hole for connecting to the other end of the second iron core 102. Both ends of the second iron core 102 are inserted into the corresponding mounting holes, and are fixedly connected to the third yoke arm 23 and the fourth yoke arm 24 by riveting. The second iron core 102, the third yoke arm 23 and the fourth yoke arm 24 form a second frame structure that is approximately U-shaped or C-shaped.

[0091] This coil assembly 10, which adopts a double-core, double-winding structure, has a shorter circumference when winding around a single core, allowing for a faster increase in the number of turns. Therefore, with the same coil length, the number of turns can be increased, thereby improving the overall magnetic attraction of the coil assembly 10.

[0092] In addition, Fig. 11 also schematically shows that the coil assembly 10 includes a magnetic circuit system structure of three cores, the three cores being the first core 101, the second core 102, and the third core 103, and each core is wound with an enameled wire to form a winding, and the three windings can be connected in series. In combination with the foregoing description of the embodiments, it is easy to understand that the coil assembly 10 with the three windings can also increase the magnetic attraction 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 fixed at both ends of the first core 101 and the second core 102, and the third yoke arm 23 and the fourth yoke arm 24 can be fixed at both ends of the third core 103. In this magnetic circuit system, the winding on the first core 101 and the second core 102 can form a first magnetic circuit with the first yoke arm 21, the armature assembly 30, and the fourth yoke arm 24, and the winding on the third core 103 can form a second magnetic circuit with the second yoke arm 22, the armature assembly 30, and the third yoke arm 23.

[0093] Fig. 12 also schematically shows that the coil assembly 10 includes a magnetic circuit system structure of four cores, the four cores being the first core 101, the second core 102, the third core 103, and the fourth core 104, and each core is wound with an enameled wire to form a winding, and the four windings can be connected in series. In combination with the foregoing description of the embodiments, it is easy to understand that the coil assembly 10 with the four windings can also increase the magnetic attraction 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 fixed at both ends of the first core 101 and the second core 102, and the third yoke arm 23 and the fourth yoke arm 24 can be fixed at both ends of the third core 103 and the fourth core 104. In this magnetic circuit system, the winding on the first core 101 and the second core 102 can form a first magnetic circuit with the first yoke arm 21, the armature assembly 30, and the fourth yoke arm 24, and the winding on the third core 103 and the fourth core 104 can form a second magnetic circuit with the second yoke arm 22, the armature assembly 30, and the third yoke arm 23.

[0094] For the coil assembly 10 formed by a larger number of 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 cores and corresponding windings is odd, the magnetic force of the first magnetic circuit and the second magnetic circuit can be made the same by controlling the number of turns of the coil or the material of the core, that is, the magnetic force driving the armature assembly 30 to rotate clockwise or counterclockwise is the same.

[0095] Optionally, as shown in Fig. 3 or Fig. 6, the two yoke arms at one of the two ends of the coil assembly 10 are connected together to make the corresponding magnetic circuit continuously conductive.

[0096] Specifically, in the magnetic circuit system of the embodiments of the present application, the two yoke arms at one end of the coil assembly 10 can be connected together, as shown in FIG. 3 or FIG. 6, 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, it is a closed magnetic circuit that is not disconnected, and the magnetic attraction force can be maintained, so that the magnetic circuit system maintains the action state when powered on, and the magnetic retention function is realized.

[0097] Optionally, referring to FIG. 7 or FIG. 8, the axes of the first core 101 and the second 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.

[0098] Specifically, in some embodiments, as shown in FIG. 7 or FIG. 8, the armature assembly 30 is installed in the accommodation space 25, and the rotation axis thereof is parallel to the Z direction. The axes of the first core 101 and the second core 102 can be parallel to the ±X direction shown in the figure, and the axes of the two can form a first reference plane, and the first reference plane is also perpendicular to the rotation axis of the armature assembly 30. That is, in the schematic of FIG. 7 or FIG. 8, the first core 101 and the second core 102 are laid flat in a plane parallel to the XOY plane. The electromagnetic assembly 10 with such a structure of double cores and double windings can effectively reduce the structure size in the ±Z direction, and can be suitable for electromagnetic relays and installation environments with relatively compact space in the ±Z direction.

[0099] Optionally, referring to FIG. 7 or FIG. 8, the length of the first core 101 is less than the length of the second core 102.

[0100] Along the length direction of the core, 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 arranged at intervals.

[0101] The first yoke arm 21 and the third yoke arm 23 are simultaneously fixedly connected with the first core 101 to continuously conduct the corresponding magnetic circuit, or the second yoke arm 22 and the fourth yoke arm 24 are simultaneously fixedly connected with the first core 101 to continuously conduct the corresponding magnetic circuit.

[0102] Specifically, in some embodiments, when the two cores in the coil assembly 10 are arranged according to the positions shown in FIG. 7 or FIG. 8, the length of the first core 101 can be designed to be smaller than the length of the second core 102, and one end of the first core 101 and the second core 102 is aligned, and the other end of the first core 101 and the second core 102 forms a staggered length difference. The second core 102, the third yoke arm 23 and the fourth yoke arm 24 enclose the first core 101, the first yoke arm 21 and the second yoke arm 22 inside. Thus, a relatively compact structure design of the magnetic circuit system can be achieved, and the structure size of the magnetic circuit system is further reduced, so as to realize the miniaturization and small size design of the electromagnetic relay.

[0103] When the two cores in the coil assembly 10 are arranged according to the positions shown in FIG. 7 or FIG. 8, along the length direction of any core (i.e. the +X direction shown in the figure), due to the shorter length of the first core 101, after the first yoke arm 21 is fixed to the end of the first core 101 and the third yoke arm 23 is fixed to the end of the second 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 end of the first core 101 and the second core 102 is in an aligned arrangement structure, the first core 101 is fixed to the fourth yoke arm 24 from the mounting hole on the second yoke arm 22 in addition to being fixed to the second yoke arm 22.

[0104] In combination with the illustration of FIG. 7 or FIG. 8, the structure form that the second yoke arm 22 and the fourth yoke arm 24 are simultaneously fixedly connected with the first core 101 can make the coil assembly 10 in the magnetic circuit system after power off, whether it is the first magnetic circuit or the second magnetic circuit, both remain as a closed magnetic circuit, which can maintain the armature assembly 30 in the magnetic attraction contact state shown in FIG. 7 or FIG. 8, that is, the electromagnetic relay can maintain the closed or open state under the action of the corresponding first magnetic circuit or second magnetic circuit.

[0105] In addition, it should be noted that in some embodiments, the magnetic circuit system described above can also be designed with the second yoke arm 22 and the fourth yoke arm 24 being spaced apart, and the first yoke arm 21 and the third yoke arm 23 are simultaneously fixedly connected with the first core 102. This magnetic circuit system has the same advantages as the above-mentioned magnetic circuit system, and will not be described in detail in the embodiments of the present application.

[0106] Optionally, referring to FIG. 9 or FIG. 10, the axes of the first core 101 and the second core 102 form a second reference plane in parallel, and the second reference plane is parallel to the rotation axis of the armature assembly 30.

[0107] Specifically, in some embodiments, as shown in FIG. 9 or FIG. 10, the armature assembly 30 is installed in the accommodating space 25, and the rotation axis thereof is parallel to the ±Z direction. The axis of the first core 101 and the second 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, which is also parallel to the rotation axis of the armature assembly 30. That is, in the schematic of FIG. 9 or FIG. 10, the first core 101 and the second core 102 are stacked in the ±Z direction in a plane parallel to the XOZ plane. The electromagnetic assembly 10 with such a double-core, double-winding structure can effectively reduce the structural size in the XOY plane and can be suitable for electromagnetic relays and installation environments with relatively compact space in the XOZ plane.

[0108] Optionally, referring to FIG. 9 or FIG. 10, the length of the first core 101 is equal to the length of the second core 102.

[0109] In the direction of the rotation axis of the armature assembly 30, the first yoke arm 21 and the third yoke arm 23 are spaced apart, and the second yoke arm 22 and the fourth yoke arm 24 are integrated to continuously conduct the corresponding magnetic circuit; or,

[0110] In the direction of the rotation axis of the armature assembly 30, the second yoke arm 22 and the fourth yoke arm 24 are spaced apart; and the first yoke arm 21 and the third yoke arm 23 are integrated to continuously conduct the corresponding magnetic circuit.

[0111] Specifically, in some embodiments, when the two cores in the coil assembly 10 are arranged according to the positions shown in FIG. 9 or FIG. 10, the length of the first core 101 can be designed to be equal to the length of the second core 102, and the two ends of the first core 101 and the second core 102 are aligned. Correspondingly, the first yoke arm 21 and the third yoke arm 23 located at the same end of the first core 101 and the second core 102 are stacked in the ±Z direction, and the second yoke arm 22 and the fourth yoke arm 24 located at the same end of the first core 101 and the second core 102 are stacked in the ±Z direction. Similar to the schematic of FIG. 7 or FIG. 8, FIG. 9 or FIG. 10 shows another compact magnetic circuit system, which can further reduce the structural size of the magnetic circuit system to facilitate the miniaturization and small size design of the electromagnetic relay.

[0112] When the two cores in the coil assembly 10 are arranged according to the positions shown in FIG. 9 or FIG. 10, along the length direction of any core (i.e. the ±X direction shown in the figure), since the first core 101 and the second core 102 are equal in 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, they can be spaced apart by a predetermined distance, which is enough 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 piece of metal can be used to form the integrated second yoke arm 22 and fourth yoke arm 24 by cutting and bending.

[0113] In combination with the illustration in FIG. 9 or FIG. 10, the integrated structure of the second yoke arm 22 and the fourth yoke arm 24 can make the magnetic circuit system maintain a closed loop for both the first magnetic circuit and the second magnetic circuit after the electromagnetic assembly 10 is powered off, so as to maintain the armature assembly 30 in the magnetic attraction contact state shown in FIG. 9 or FIG. 10, that is, the electromagnetic relay can maintain the closed or open state under the action of the corresponding first magnetic circuit or second magnetic circuit.

[0114] In addition, it should be noted that in some embodiments, the above-mentioned magnetic circuit system can also be designed such that the second yoke arm 22 and the fourth yoke arm 24 are spaced apart by a predetermined distance, and the first yoke arm 21 and the third yoke arm 23 are integrated. Such a magnetic circuit system has the same advantages as the above-mentioned magnetic circuit system, and will not be described in detail in the embodiments of the present application.

[0115] Optionally, the two ends of the first winding extend to form a first pin and a second pin, and the two ends of the second winding extend to form a third pin and a fourth pin.

[0116] 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.

[0117] Specifically, in the embodiments of the present application, the first winding and the second winding can be two coils of enameled wire wound to form a winding. The two ends of one coil of enameled wire extending after being wound to form the first winding are the first pin and the second pin, respectively. The two ends of the other coil of enameled wire extending after being wound to form the second winding are the third pin and the fourth pin, respectively. The second pin and the third pin can be welded or short-circuited by a connector, so as to connect the first winding and the second winding in series. The remaining first pin and second pin are exposed as pins of the coil assembly outside, used to connect a control device and receive a low-voltage control signal sent from the control device. In addition, it should be noted that the enameled wire is wound on the first winding and the second winding in the same direction, so as to ensure that the magnetic force directions of the two windings are the same after being powered on, thereby enhancing the magnetic force and avoiding the attenuation of the magnetic force.

[0118] Optionally, referring to FIG. 13, the armature assembly 30 comprises a first armature 301, a second armature 302 and a permanent magnet;

[0119] The first armature 301 and the second armature 302 are arranged in parallel and spaced apart, and the permanent magnet is clamped between the first armature 301 and the second armature 302.

[0120] The two ends of the first armature 301 are first magnetic poles of the same polarity, the two ends of the second armature 302 are second magnetic poles of the same polarity, and the polarities of the first magnetic poles and the second magnetic poles are opposite.

[0121] Specifically, regardless of whether the magnetic circuit system adopts the structure shown in FIG. 7 or FIG. 8 or the structure shown in FIG. 9 or FIG. 10 in the foregoing embodiments, as shown in FIG. 13, the armature assembly 30 can comprise 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 can be strip-shaped magnetic conductors, and the two armatures can be injection molded with the permanent magnet and the plastic shell 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 shown in FIG. 7 to FIG. 10, along the ±X direction, the two ends of the first armature 301 are N poles, and the two ends of the second armature 3012 are S poles.

[0122] In combination with the illustrations of FIG. 7 to FIG. 10, it is easy to understand that the force of one end of the first armature 301 is an attractive force, and the force of the same end of the second armature 30 is a repulsive force, at the same time, the force of the other end of the first armature 301 is a repulsive force, and the force of the same end of the second armature 30 is an attractive force. That is, in the illustration, along the Y direction, one side of the left and right sides is an attractive force, and the other side is a repulsive force, thereby forming a torque for driving the armature assembly 30 to rotate.

[0123] Optionally, at least two windings in the coil assembly 10 are connected in series.

[0124] Specifically, in some embodiments, when the windings in the coil assembly 10 are not less than two, the windings can be electrically connected in series with each other. It is easy to understand that, in the case that the working voltage remains unchanged, the series connection of the at least two windings is conducive to reducing the power consumption of the entire coil assembly 10, which can reduce the consumption of electric energy, make the product more energy-saving, and lower the use cost.

[0125] The application also provides an electromagnetic relay comprising the magnetic circuit system disclosed in any one of the foregoing embodiments of the application.

[0126] In the embodiments of the present application, the magnetic circuit system and other modules such as the contact system can be combined to form an electromagnetic relay. Based on the advantages of the magnetic circuit system, the electromagnetic relay of the embodiments of the present application has less magnetic interference, higher magnetic utilization, stronger magnetic force, and higher working sensitivity.

[0127] Optionally, referring to FIGS. 1-4, the electromagnetic relay further includes a push rod 40, a moving spring assembly 41, and a stationary spring assembly 42.

[0128] The armature assembly 30 is connected to one end of the push rod 40, and the moving spring assembly 41 is connected to the other end of the push rod 40. The stationary spring assembly 42 is arranged opposite to the moving spring assembly 41, and the moving spring assembly 41 can be kept in contact or disconnected with the stationary spring assembly 42.

[0129] When the first magnetic circuit is formed, the stationary spring assembly 42 and the moving spring assembly 41 are kept in one of the contact or disconnected states; when the second magnetic circuit is formed, the stationary spring assembly 42 and the moving spring assembly 41 are kept in the other of the contact or disconnected states.

[0130] Specifically, as shown in FIGS. 1-4, the contact system of the electromagnetic relay of the embodiments of the present application can include the moving spring assembly 41 and the stationary spring assembly 42.

[0131] The moving spring assembly 41 can include a moving contact 411, a moving spring piece 412, and a moving spring lead piece 413. The moving spring lead piece 413 can be a rigid structure for mounting and fixing the elastic moving spring piece 412, and at the same time, the moving spring lead piece 413 is also used to form a wiring terminal exposed outside the relay. The moving contact 411 can be arranged on the surface of the moving spring piece 412, and the push rod 40 is connected to the moving spring piece 412. The stationary spring assembly 42 can include a stationary contact 421 and a stationary spring lead piece 422. The stationary spring lead piece 422 can be a rigid structure for forming a wiring terminal exposed outside the relay. The stationary contact 421 can be arranged on the surface of the stationary spring lead piece 422.

[0132] The push rod 40 can be arranged along the ±X direction as 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 arranged on the side surface of the plastic bracket of the armature assembly 30, and the push arm is inserted into the mounting portion of the other end of the push rod 40. When the armature assembly 30 rotates, the push rod 40 can be moved along the ±X direction by the push arm.

[0133] As shown in Fig. 7 or Fig. 9, when the armature assembly 30 rotates clockwise, the push arm drives the push rod 40 to move in -X direction, the push rod 40 pushes the moving spring 412 to move upward, so that the moving contact 411 is close to the stationary contact 421, and when the two contacts are in contact, the relay is in the on state. As shown in Fig. 8 or Fig. 10, when the armature assembly 30 rotates counterclockwise, the push arm drives the push rod 40 to move in +X direction, the push rod 40 pushes the moving spring 412 to move downward, so that the moving contact 411 is away from the stationary contact 421, and when the two contacts are separated, the relay is in the off state.

[0134] It should be noted that the terms "comprising", "including", or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements are not limited to those elements, but can also include other elements not expressly listed, or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element. In addition, it should be pointed out that the scope of the methods and apparatuses in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in reverse order, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted, or combined. In addition, features described with reference to certain examples can be combined in other examples.

[0135] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-described specific embodiments, and the above-described specific embodiments are only illustrative, not limiting, and those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which are all within the protection of the present application.

Claims

1. A magnetic circuit system, wherein, 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 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; 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.

2. The magnetic circuit system of claim 1, wherein, 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, When the armature assembly is lapped with the second yoke arm and the third yoke arm, the magnetic circuit system has a second magnetic circuit.

3. The magnetic circuit system of claim 1, wherein, The first yoke arm, the second yoke arm, the third yoke arm and the fourth yoke arm form an accommodation space, and the armature assembly is rotatably arranged in the accommodation space; When the armature assembly rotates to a first position, the armature assembly is lapped with the first yoke arm and the fourth yoke arm; When the armature assembly rotates to a second position, the armature assembly is lapped with the second yoke arm and the third yoke arm.

4. The magnetic circuit system of claim 3, wherein, The first yoke arm, the second yoke arm, the third yoke arm and the fourth yoke arm are all L-shaped, comprising 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 form the accommodation space.

5. The magnetic circuit system of any one of claims 1 to 4, wherein, The coil assembly comprises a first core and a second core; The outer part of the first core is wound with a first winding, the outer part of the second core is wound with a second winding, and the winding directions of the first winding and the second winding are the same; The first yoke arm and the second yoke arm are fixed to the two ends of the first core, and the third yoke arm and the fourth yoke arm are fixed to the two ends of the second core.

6. The magnetic circuit system of claim 5, wherein, Two yoke arms at one end of the coil assembly are connected together to make the corresponding magnetic circuit continuously conductive.

7. The magnetic circuit system of claim 6, wherein, The axes of the first core and the second 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 of claim 7, wherein, The length of the first core is less than the length of the second core; Along the length direction of the 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 simultaneously fixedly connected with the first core to make the corresponding magnetic circuit continuously conductive, or the second yoke arm and the fourth yoke arm are simultaneously fixedly connected with the first core to make the corresponding magnetic circuit continuously conductive.

9. The magnetic circuit system of claim 6, wherein, The axes of the first core and the second core are parallel to form a second reference surface, which is parallel to the rotation axis of the armature assembly.

10. The magnetic circuit system of claim 9, wherein, The length of the first core is equal to the length of the second core. The first yoke arm and the third yoke arm are spaced apart along the rotation axis of the armature assembly; the second yoke arm and the fourth yoke arm are integrated to continuously conduct the corresponding magnetic circuit. Or, The second yoke arm and the fourth yoke arm are spaced apart along the rotation axis of the armature assembly; the first yoke arm and the third yoke arm are integrated to continuously conduct the corresponding magnetic circuit.

11. The magnetic circuit system of claim 6, wherein, The two ends of the first winding extend to form a first pin and a second pin, and the 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 and 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 of claim 1, wherein, The armature assembly includes a first armature, a second armature, and a permanent magnet. The first armature and the second armature are spaced apart in parallel, and the permanent magnet is clamped between the first armature and the second armature. The two ends of the first armature are first magnetic poles of the same polarity, the two ends of the second armature are second magnetic poles of the same polarity, and the polarities of the first magnetic poles and the second magnetic poles are opposite.

13. The magnetic circuit system of claim 1, wherein, At least two windings in the coil assembly are connected in series.

14. An electromagnetic relay, wherein, The magnetic circuit system includes any one of claims 1 to 13.

15. The electromagnetic relay of claim 14, wherein, It 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, 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 in contact or disconnected state by approaching or moving away from the static spring assembly. When the first magnetic circuit is formed, the static spring assembly and the dynamic spring assembly are in one of the contact or disconnected states; when the second magnetic circuit is formed, the static spring assembly and the dynamic spring assembly are in the other of the contact or disconnected states.

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