Electromagnetic system and magnetic latching relay

Abstract

The invention belongs to the technical field of low-voltage electric appliances, and particularly discloses an electromagnetic system and a magnetic latching relay. According to the electromagnetic system provided by the invention, when the magnetic latching relay is disconnected, the first end of the first armature is attracted to the first attraction part, the second end of the second armature is attracted to the fourth attraction part, and a first magnetic circuit is formed, so that the magnetic latching relay is in a disconnected state; when the magnetic latching relay is closed, the second end of the first armature is attracted to the third attraction part, the first end of the second armature is attracted to the second attraction part, and a second magnetic circuit is formed, so that the magnetic latching relay is in a closed state; the first magnetic circuit and the second magnetic circuit are both closed-loop magnetic circuits, no air gap exists between the attraction part and the armature, the magnetic attraction efficiency is improved, and then the breaking capacity of the magnetic latching relay can be improved; besides, the structure that the armature is attracted to the attraction part is compact, and the electromagnetic system is a direct-acting electromagnetic system, so that the safety distance between the moving contact assembly and the static contact assembly can be increased in a limited space.

Description

Technical Field

[0001] The invention relates to the technical field of low-voltage electrical appliances, and in particular to an electromagnetic system and a magnetic latching relay. Background Art

[0002] A magnetic latching relay is an electronic switch that switches the load circuit on and off. When a pulse voltage is applied to the coil of the magnetic latching relay, the magnetic circuit structure of the magnetic latching relay will generate a constant magnetic field, which keeps the magnetic latching relay in a closed or open state.

[0003] At present, magnetic latching relays drive the relays to operate through pulse signals and rely on internal permanent magnets to maintain the current state. The electromagnetic system of magnetic latching relays is mostly a rotating structure. It is difficult for magnetic latching relays with this structure to increase the safe distance between the moving contact group and the static contact group in a limited space. For direct-acting magnetic latching relays, when the permanent magnet slides relative to the coil assembly, an air gap will be formed between the armature connected to the permanent magnet and the yoke of the coil assembly, resulting in low magnetic efficiency. A greater driving force is required to push the permanent magnet to slide, and it is also difficult to increase the safe distance between the moving contact group and the static contact group in a limited space. Summary of the invention

[0004] The object of the present invention is to provide an electromagnetic system and a magnetic latching relay, which improve the breaking capacity of the magnetic latching relay and increase the safety distance between the moving contact assembly and the static contact assembly in a limited space.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In a first aspect, an electromagnetic system is provided for use in a magnetic latching relay, the electromagnetic system comprising:

[0007] A coil unit, the coil unit comprising a coil, an iron core, a first magnetic yoke assembly and a second magnetic yoke assembly, the coil is sleeved on the outside of the iron core, the first magnetic yoke assembly and the second magnetic yoke assembly are connected at both ends of the iron core, the first magnetic yoke assembly comprises a first suction portion and a second suction portion, and the second magnetic yoke assembly comprises a third suction portion and a fourth suction portion;

[0008] The armature unit includes a permanent magnet, two magnetic poles of the permanent magnet are connected to a first armature and a second armature, the armature unit can move relative to the coil, when the magnetic holding relay is disconnected, the first end of the first armature is attracted to the first attraction part, the second end of the second armature is attracted to the fourth attraction part, and a first magnetic circuit is formed, when the magnetic holding relay is closed, the second end of the first armature is attracted to the third attraction part, the first end of the second armature is attracted to the second attraction part, and a second magnetic circuit is formed.

[0009] As an optional technical solution for the above-mentioned electromagnetic system, the first magnetic yoke assembly also includes a first yoke, a first end of the first yoke is connected to the first end of the iron core, and a second end of the first yoke is provided with the first suction part and the second suction part, the first suction part and the second suction part are arranged between the first armature and the second armature, and the first suction part is arranged toward the first armature, and the second suction part is arranged toward the second armature.

[0010] As an optional technical solution for the above-mentioned electromagnetic system, the second end of the first yoke is connected to a first attraction plate, the first attraction plate extends toward the second magnetic yoke assembly, the first attraction plate is placed between the first armature and the second armature, the side surface of the first attraction plate facing the first armature is the first attraction portion, and the side surface of the first attraction plate facing the second armature is the second attraction portion.

[0011] As an optional technical solution to the above-mentioned electromagnetic system, the second magnetic yoke assembly also includes a second yoke and a third yoke, the first end of the second yoke and the first end of the third yoke are respectively connected to the second end of the iron core, the second end of the second yoke is provided with a third suction portion, the second end of the third yoke is provided with a fourth suction portion, the third suction portion and the fourth suction portion are spaced apart in the first direction, and the first armature and the second armature are arranged between the third suction portion and the fourth suction portion.

[0012] As an optional technical solution for the above-mentioned electromagnetic system, the second end of the second yoke is connected to a second attraction plate, the second end of the third yoke is connected to a third attraction plate, the third attraction plate and the second attraction plate both extend toward the first magnetic yoke assembly, the third attraction plate and the second attraction plate are spaced apart in the first direction, a side surface of the second attraction plate facing the third attraction plate is the third attraction portion, a side surface of the third attraction plate facing the second attraction plate is the fourth attraction portion, and the first armature and the second armature are placed between the second attraction plate and the third attraction plate.

[0013] As an optional technical solution of the above-mentioned electromagnetic system, the armature unit further includes a cover shell, and the cover shell is arranged on the outer side of the permanent magnet component;

[0014] The first end of the first armature passes through the cover shell, and the first end and the second end of the first armature are placed on opposite sides outside the cover shell;

[0015] The first end of the second armature passes through the cover shell, and the first end and the second end of the second armature are placed on two opposite sides outside the cover shell.

[0016] As an optional technical solution of the above-mentioned electromagnetic system, the cover shell is provided with sliding parts on two other opposite sides respectively, and the sliding parts are used for sliding connection with the housing of the magnetic latching relay.

[0017] As an optional technical solution of the above-mentioned electromagnetic system, a connecting portion is further provided on the cover shell, and the connecting portion is used to be connected to the moving contact assembly of the magnetic latching relay.

[0018] As an optional technical solution of the above-mentioned electromagnetic system, the coil unit also includes a coil sleeve, the coil is wound on the coil sleeve, and a first mounting seat and a second mounting seat are provided at both ends of the coil sleeve. The iron core is placed in the coil sleeve, and the first mounting seat and the second mounting seat are passed through both ends of the iron core. The first mounting seat is provided with a first accommodating groove, and the first end of the first yoke assembly is placed in the first accommodating groove and connected to the iron core. The second mounting seat is provided with a second accommodating groove, and the first end of the second yoke assembly is placed in the second accommodating groove and connected to the iron core.

[0019] In a second aspect, a magnetic holding relay is provided, comprising a housing, a stationary contact assembly, a moving contact assembly and the above-mentioned electromagnetic system, wherein the stationary contact assembly, the moving contact assembly and the electromagnetic system are all arranged in the housing, the moving contact assembly is connected to the armature unit of the electromagnetic system, and the armature unit moves to make the moving contact assembly and the stationary contact assembly close or open.

[0020] Beneficial effects of the present invention:

[0021] The electromagnetic system provided by the present invention has the following characteristics: when the magnetic latching relay is disconnected, the first end of the first armature is attracted to the first attraction part, the second end of the second armature is attracted to the fourth attraction part, and a first magnetic circuit is formed, so that the magnetic latching relay is in an disconnected state; when the magnetic latching relay is closed, the second end of the first armature is attracted to the third attraction part, the first end of the second armature is attracted to the second attraction part, and a second magnetic circuit is formed, so that the magnetic latching relay is in a closed state; the first magnetic circuit and the second magnetic circuit are both closed-loop magnetic circuits, and there is no air gap between the attraction part and the armature, which improves the magnetic attraction efficiency and thus can improve the breaking capacity of the magnetic latching relay; in addition, different pulse current signals are applied to the coil to realize the disconnection or attraction of the magnetic latching relay, and the structure of the armature and the attraction part being attracted is relatively compact, which reduces the occupied space, and the electromagnetic system is a direct-acting electromagnetic system, so that the safety distance between the moving contact assembly and the static contact assembly can be increased in a limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the overall structure of an electromagnetic system provided by an embodiment of the present invention;

[0023] Figure 2 is a state diagram of the electromagnetic system when the magnetic latching relay provided by the embodiment of the present invention is in the disconnected state;

[0024] Figure 3 is a state diagram of the electromagnetic system when the magnetic latching relay provided by the embodiment of the present invention is in a closed state;

[0025] Figure 4 is a schematic diagram of the overall structure of a coil unit provided in an embodiment of the present invention;

[0026] Figure 5 is an exploded diagram of a coil unit provided by an embodiment of the present invention;

[0027] Figure 6 is a schematic structural diagram of an electromagnetic system provided by another embodiment of the present invention;

[0028] Figure 7 is a schematic structural diagram of an electromagnetic system provided by another embodiment of the present invention;

[0029] Figure 8 is a schematic structural diagram of an electromagnetic system provided by another embodiment of the present invention;

[0030] Fig. 9 is a schematic structural diagram of an electromagnetic system provided by another embodiment of the present invention;

[0031] Fig.10 It is a schematic diagram of the overall structure of the armature unit provided in an embodiment of the present invention.

[0032] In the figure:

[0033] 11. Coil unit; 12. Armature unit;

[0034] 111, coil; 112, iron core; 113, first magnetic yoke assembly; 1131, first suction portion; 1132, second suction portion; 1133, first yoke; 1134, first suction plate; 1135, fourth yoke; 1136, fourth suction plate; 114, second magnetic yoke assembly; 1141, third suction portion; 1142, fourth suction portion; 1143, second yoke; 1144, third yoke; 1145, second suction plate; 1146, third suction plate; 115, coil sleeve; 116, first mounting seat; 1161, first receiving groove; 117, second mounting seat; 1171, second receiving groove;

[0035] 121, permanent magnet; 122, first armature; 123, second armature; 124, cover; 125, sliding part; 126, connecting part;

[0036] a. First magnetic circuit; b. Second magnetic circuit. DETAILED DESCRIPTION

[0037] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] like Figures 1 to 3As shown, this embodiment provides an electromagnetic system for a magnetic latching relay, which includes a coil unit 11 and an armature unit 12. The coil unit 11 includes a coil 111, an iron core 112, a first yoke assembly 113 and a second yoke assembly 114. The coil 111 is sleeved on the outside of the iron core 112, and the first yoke assembly 113 and the second yoke assembly 114 are connected to both ends of the iron core 112. The first yoke assembly 113 includes a first suction portion 1131 and a second suction portion 1132, and the second yoke assembly 114 includes a third suction portion 1141 and a fourth suction portion 1142. The armature unit 12 includes a permanent magnet 121, and the two magnetic pole ends of the permanent magnet 121 are connected to the first armature 122 and the second armature 123. The armature unit 12 can move relative to the coil 111. When the magnetic holding relay is disconnected, the first end of the first armature 122 is attracted to the first attraction part 1131, and the second end of the second armature 123 is attracted to the fourth attraction part 1142 to form a first magnetic circuit a. When the magnetic holding relay is closed, the second end of the first armature 122 is attracted to the third attraction part 1141, and the first end of the second armature 123 is attracted to the second attraction part 1132 to form a second magnetic circuit b.

[0042] When the magnetic latching relay is disconnected, the first end of the first armature 122 is attracted to the first suction part 1131, and the second end of the second armature 123 is attracted to the fourth suction part 1142. At the same time, the first end of the second armature 123 is separated from the second suction part 1132, and the second end of the first armature 122 is separated from the third suction part 1141, and a first magnetic circuit a is formed, so that the magnetic latching relay is in an off state; when the magnetic latching relay is closed, the second end of the first armature 122 is attracted to the third suction part 1141, the first end of the second armature 123 is attracted to the second suction part 1132, and the second end of the second armature 123 is separated from the fourth suction part 1142. The first end of the first armature 122 is separated from the first attraction part 1131, and a second magnetic circuit b is formed, so that the magnetic holding relay is in a closed state; the first magnetic circuit a and the second magnetic circuit b are both closed-loop magnetic circuits, and there is no air gap between the attraction part and the armature, which improves the magnetic attraction efficiency and thus can improve the breaking capacity of the magnetic holding relay; in addition, different pulse current signals are applied to the coil 111 to realize the disconnection or attraction of the magnetic holding relay, and the structure of the armature and the attraction part is relatively compact, which reduces the occupied space, and the electromagnetic system is a direct-acting electromagnetic system, which can increase the safety distance between the moving contact assembly and the static contact assembly in a limited space.

[0043] It is further necessary to explain that the coil 111 is connected to the power supply. When the first pulse signal is applied to the coil 111, the first end of the first armature 122 is attracted to the first suction part 1131, and the second end of the second armature 123 is attracted to the fourth suction part 1142, forming a first magnetic circuit a, and the magnetic holding circuit is in a disconnected state. When the second pulse signal is applied to the coil 111, the second end of the first armature 122 is attracted to the third suction part 1141, and the first end of the second armature 123 is attracted to the second suction part 1132, forming a second magnetic circuit b, and the magnetic holding relay is in a closed state. The magnetic field directions of the first magnetic circuit a and the second magnetic circuit b are opposite, and the directions of movement of the permanent magnet 121 are also opposite. The pulse directions of the first pulse signal and the second pulse signal are opposite.

[0044] like Figure 4 and Figure 5 As shown, the coil unit 11 also includes a coil sleeve 115, the coil 111 is wound on the coil sleeve 115, and a first mounting seat 116 and a second mounting seat 117 are provided at both ends of the coil sleeve 115. The iron core 112 is placed in the coil sleeve 115, and the first mounting seat 116 and the second mounting seat 117 are passed through both ends of the iron core 112. The first mounting seat 116 is provided with a first accommodating groove 1161, the first end of the first yoke assembly 113 is placed in the first accommodating groove 1161 and is connected to the iron core 112, the second mounting seat 117 is provided with a second accommodating groove 1171, and the first end of the second yoke assembly 114 is placed in the second accommodating groove 1171 and is connected to the iron core 112. The coil sleeve 115 provides effective support for the coil 111 and also serves to fix the iron core 112. In addition, the first mounting seat 116 and the second mounting seat 117 serve to fix the first yoke assembly 113 and the second yoke assembly 114, so that the coil 111, the iron core 112, the first yoke assembly 113 and the second yoke assembly 114 form a stable connection structure.

[0045] In some embodiments, continue to refer to Figure 2 and Figure 3As shown, the first magnetic yoke assembly 113 further includes a first yoke 1133, a first end of the first yoke 1133 is connected to the first end of the iron core 112, a second end of the first yoke 1133 is provided with a first suction portion 1131 and a second suction portion 1132, the first suction portion 1131 and the second suction portion 1132 are arranged between the first armature 122 and the second armature 123, and the first suction portion 1131 is arranged toward the first armature 122, and the second suction portion 1132 is arranged toward the second armature 123. The structure is simple, and sufficient space is provided for the movement of the first armature 122 and the second armature 123, thereby increasing the safety distance between the moving contact assembly and the static contact assembly in a limited space. The permanent magnet 121 moves along the first direction to achieve the first armature 122 and the first suction part 1131 to be attracted, and the second armature 123 and the second suction part 1132 to be separated, or the second armature 123 and the second suction part 1132 to be attracted, and the first armature 122 and the first suction part 1131 to be separated.

[0046] Further optionally, the second end of the first yoke 1133 is connected to a first suction plate 1134, the first suction plate 1134 extends toward the second magnetic yoke assembly 114, the first suction plate 1134 is disposed between the first armature 122 and the second armature 123, the side surface of the first suction plate 1134 facing the first armature 122 is the first suction portion 1131, and the side surface of the first suction plate 1134 facing the second armature 123 is the second suction portion 1132. The first suction plate 1134 and the first yoke 1133 are an integrally formed structure, the first yoke 1133 extends along the first direction, and the first suction plate 1134 and the first yoke 1133 are arranged at an angle. The first armature 122 and the first suction part 1131 as well as the second armature 123 and the second suction part 1132 are in surface contact with a large contact area, thereby increasing the magnetic attraction force between the first armature 122 or the second armature 123 and the first yoke assembly 113, so that the magnetic holding relay can be stably maintained in the closed state or the open state.

[0047] In some embodiments, the second magnetic yoke assembly 114 further includes a second yoke 1143 and a third yoke 1144, the first end of the second yoke 1143 and the first end of the third yoke 1144 are respectively connected to the second end of the iron core 112, the second end of the second yoke 1143 is provided with a third suction portion 1141, the second end of the third yoke 1144 is provided with a fourth suction portion 1142, the third suction portion 1141 and the fourth suction portion 1142 are arranged at intervals in the first direction, and the first armature 122 and the second armature 123 are arranged between the third suction portion 1141 and the fourth suction portion 1142. The permanent magnet 121 moves along the first direction to achieve the first armature 122 and the third suction portion 1141 suction, while the second armature 123 and the fourth suction portion 1142 are separated, or the second armature 123 and the fourth suction portion 1142 suction, the first armature 122 and the third suction portion 1141 are separated. The distance between the third attraction portion 1141 and the fourth attraction portion 1142 defines a movement range of the permanent magnet 121 in the first direction.

[0048] Optionally, the second end of the second yoke 1143 is connected to a second suction plate 1145, the second end of the third yoke 1144 is connected to a third suction plate 1146, the third suction plate 1146 and the second suction plate 1145 both extend toward the first magnetic yoke assembly 113, the third suction plate 1146 and the second suction plate 1145 are spaced apart in the first direction, the side surface of the second suction plate 1145 facing the third suction plate 1146 is the third suction portion 1141, the side surface of the third suction plate 1146 facing the second suction plate 1145 is the fourth suction portion 1142, and the first armature 122 and the second armature 123 are disposed between the second suction plate 1145 and the third suction plate 1146. The second suction plate 1145 and the second yoke 1143 are an integrally formed structure, the second yoke 1143 extends along the first direction, and the second suction plate 1145 and the second yoke 1143 are disposed at an angle. The third suction plate 1146 and the third yoke 1144 are integrally formed, the third yoke 1144 extends along the first direction, and the third suction plate 1146 and the third yoke 1144 are arranged at an angle. The first armature 122 and the third suction portion 1141, as well as the second armature 123 and the fourth suction portion 1142 are in surface contact, with a large contact area, which increases the magnetic attraction between the first armature 122 or the second armature 123 and the second magnetic yoke assembly 114, so that the magnetic latching relay can be stably maintained in the closed state or the open state.

[0049] In some other embodiments, such as Figure 6As shown, the second magnetic yoke assembly 114 includes a second yoke 1143, the second yoke 1143 is bent into a U-shaped structure, and the first end and the second end of the second yoke 1143 are spaced apart in the first direction, the bent and overlapping parts of the second yoke 1143 fit together and are both connected to the iron core 112, the first end of the second yoke 1143 is provided with a second suction plate 1145, the second end of the second yoke 1143 is provided with a third suction plate 1146, the third suction plate 1146 and the second suction plate 1145 are spaced apart in the first direction, the side surface of the second suction plate 1145 facing the third suction plate 1146 is the third suction portion 1141, the side surface of the third suction plate 1146 facing the second suction plate 1145 is the fourth suction portion 1142, and the first armature 122 and the second armature 123 are placed between the second suction plate 1145 and the third suction plate 1146. This solution reduces the number of yokes set and simplifies the structure of the second magnetic yoke assembly 114. Optionally, the second attraction plate 1145 and the third attraction plate 1146 are integrally formed with the second yoke 1143 , that is, two ends of the second yoke 1143 are bent to form the second attraction plate 1145 and the third attraction plate 1146 .

[0050] In some other embodiments, such as Figure 7 As shown, the second magnetic yoke assembly 114 includes a second yoke 1143, a first end of the second yoke 1143 is connected to the second end of the iron core 112, and the second end of the second yoke 1143 is provided with a second suction plate 1145, the side of the second suction plate 1145 facing the iron core 112 is the third suction portion 1141, and the side of the second suction plate 1145 away from the iron core 112 is the fourth suction portion 1142, the second end of the first armature 122 and the second end of the second armature 123 are arranged in an X shape, the second end of the first armature 122 is placed between the iron core 112 and the third suction portion 1141, and the second suction plate 1145 is placed between the second end of the first armature 122 and the second end of the second armature 123.

[0051] In some other embodiments, such as Figure 8As shown, the first magnetic yoke assembly 113 and the second magnetic yoke assembly 114 have the same structure. The first magnetic yoke assembly 113 includes a first yoke 1133 and a fourth yoke 1135. The first end of the first yoke 1133 and the first end of the fourth yoke 1135 are respectively connected to the first end of the iron core 112. The second end of the first yoke 1133 is provided with a first suction plate 1134, and the second end of the second yoke 1143 is provided with a fourth suction plate 1136. The first suction plate 1134 and the fourth suction plate 1135 are respectively connected to the first end of the iron core 112. The closing plates 1136 are spaced apart in the first direction, the side of the first suction plate 1134 away from the fourth suction plate 1136 is the first suction portion 1131, the side of the fourth suction plate 1136 away from the first suction plate 1134 is the second suction portion 1132, the first end of the first armature 122 is placed on the side of the first suction plate 1134 away from the fourth suction plate 1136, and the first end of the second armature 123 is placed on the side of the fourth suction plate 1136 away from the first suction plate 1134. The second magnetic yoke assembly 114 includes a second yoke 1143 and a third yoke 1144, the first end of the second yoke 1143 and the first end of the third yoke 1144 are respectively connected to the second end of the iron core 112, the second end of the second yoke 1143 is provided with a second suction plate 1145, the second end of the third yoke 1144 is provided with a third suction plate 1146, the second suction plate 1145 and the third suction plate 1146 are spaced apart in the first direction, the side of the second suction plate 1145 facing the third suction plate 1146 is the third suction portion 1141, the side of the third suction plate 1146 facing the second suction plate 1145 is the fourth suction portion 1142, the first armature 122 and the second armature 123 are placed between the second suction plate 1145 and the third suction plate 1146.

[0052] In some other embodiments, such as Fig. 9As shown, the first magnetic yoke assembly 113 and the second magnetic yoke assembly 114 have the same structure, the first magnetic yoke assembly 113 includes a first yoke 1133, the first end of the first yoke 1133 is connected to the first end of the iron core 112, the second end of the first yoke 1133 is provided with a first suction plate 1134 and a fourth suction plate 1136, the first suction plate 1134 and the fourth suction plate 1136 are spaced apart in the first direction, the side of the first suction plate 1134 away from the fourth suction plate 1136 is the first suction portion 1131, the side of the fourth suction plate 1136 away from the first suction plate 1134 is the second suction portion 1132, the first end of the first armature 122 is placed on the side of the first suction plate 1134 away from the fourth suction plate 1136, and the first end of the second armature 123 is placed on the side of the fourth suction plate 1136 away from the first suction plate 1134. The second magnetic yoke assembly 114 includes a second yoke 1143, a first end of the second yoke 1143 is connected to the second end of the iron core 112, and the second end of the second yoke 1143 is provided with a second attraction plate 1145 and a third attraction plate 1146, the second attraction plate 1145 and the third attraction plate 1146 are spaced apart in the first direction, the side of the second attraction plate 1145 facing the third attraction plate 1146 is the third attraction portion 1141, the side of the third attraction plate 1146 facing the second attraction plate 1145 is the fourth attraction portion 1142, and the first armature 122 and the second armature 123 are placed between the second attraction plate 1145 and the third attraction plate 1146.

[0053] like Fig.10 As shown, the armature unit 12 further includes a cover 124, which is disposed on the outer side of the permanent magnet 121 to protect the permanent magnet 121 from damage. The first end of the first armature 122 passes through the cover 124, and the first end and the second end of the first armature 122 are placed on opposite sides outside the cover 124. The first end of the second armature 123 passes through the cover 124, and the first end and the second end of the second armature 123 are placed on opposite sides outside the cover 124. Both ends of the first armature 122 and the second armature 123 are disposed outside the cover 124, so that the armature and the suction part can be sucked together.

[0054] Optionally, two opposite sides of the cover 124 are provided with sliding parts 125, which are used to be slidably connected with the housing of the magnetic latching relay to ensure that the armature unit 12 can move stably and ensure that the armature and the suction part are accurately sucked. The sliding part 125 can be a sliding block, which is not specifically limited here.

[0055] The cover 124 is also provided with a connecting portion 126, which is used to connect with the moving contact assembly of the magnetic latching relay, so that the moving contact assembly moves synchronously with the armature unit 12, and the moving contact assembly and the static contact assembly of the magnetic latching relay are attracted or separated. The connecting portion 126 includes a U-shaped piece, and the two opposite side walls of the inner side of the U-shaped piece are respectively provided with a slide groove, and one end of the moving contact assembly is inserted into the slide groove to fix the moving contact assembly on the cover 124, and the structure is simple and easy to assemble.

[0056] This embodiment also provides a magnetic latching relay, including a housing, a static contact assembly, a moving contact assembly and the above-mentioned electromagnetic system, wherein the static contact assembly, the moving contact assembly and the electromagnetic system are all arranged in the housing, the moving contact assembly is connected to the armature unit 12 of the electromagnetic system, and the armature unit 12 moves to make the moving contact assembly and the static contact assembly close or disconnect. The structures of the moving contact assembly and the static contact assembly are prior art and will not be described in detail here.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An electromagnetic system, used in a magnetic latching relay, characterized in that: The electromagnetic system comprises: A coil unit (11), the coil unit (11) comprising a coil (111), an iron core (112), a first magnetic yoke assembly (113) and a second magnetic yoke assembly (114); the coil (111) is sleeved on the outside of the iron core (112); the first magnetic yoke assembly (113) and the second magnetic yoke assembly (114) are connected at two ends of the iron core (112); the first magnetic yoke assembly (113) comprises a first suction portion (1131) and a second suction portion (1132); the second magnetic yoke assembly (114) comprises a third suction portion (1141) and a fourth suction portion (1142); The armature unit (12) comprises a permanent magnet (121), two magnetic pole ends of the permanent magnet (121) are connected to a first armature (122) and a second armature (123), the armature unit (12) can move relative to the coil (111), when the magnetic latching relay is disconnected, the first end of the first armature (122) is attracted to the first attraction part (1131), the second end of the second armature (123) is attracted to the fourth attraction part (1142), and a first magnetic circuit (a) is formed; when the magnetic latching relay is closed, the second end of the first armature (122) is attracted to the third attraction part (1141), the first end of the second armature (123) is attracted to the second attraction part (1132), and a second magnetic circuit (b) is formed.

2. The electromagnetic system according to claim 1, characterized in that The first magnetic yoke assembly (113) also includes a first yoke (1133), the first end of the first yoke (1133) is connected to the first end of the iron core (112), the second end of the first yoke (1133) is provided with the first suction portion (1131) and the second suction portion (1132), the first suction portion (1131) and the second suction portion (1132) are arranged between the first armature (122) and the second armature (123), and the first suction portion (1131) is arranged toward the first armature (122), and the second suction portion (1132) is arranged toward the second armature (123).

3. The electromagnetic system according to claim 2, characterized in that The second end of the first yoke (1133) is connected to a first attraction plate (1134), the first attraction plate (1134) extends toward the second magnetic yoke assembly (114), the first attraction plate (1134) is disposed between the first armature (122) and the second armature (123), a side surface of the first attraction plate (1134) facing the first armature (122) is the first attraction portion (1131), and a side surface of the first attraction plate (1134) facing the second armature (123) is the second attraction portion (1132).

4. The electromagnetic system according to any one of claims 1 to 3, characterized in that The second magnetic yoke assembly (114) further comprises a second yoke (1143) and a third yoke (1144); the first end of the second yoke (1143) and the first end of the third yoke (1144) are respectively connected to the second end of the iron core (112); the second end of the second yoke (1143) is provided with a third suction portion (1141); the second end of the third yoke (1144) is provided with a fourth suction portion (1142); the third suction portion (1141) and the fourth suction portion (1142) are arranged at intervals in a first direction; the first armature (122) and the second armature (123) are arranged between the third suction portion (1141) and the fourth suction portion (1142).

5. The electromagnetic system according to claim 4, characterized in that The second end of the second yoke (1143) is connected to a second attraction plate (1145), the second end of the third yoke (1144) is connected to a third attraction plate (1146), the third attraction plate (1146) and the second attraction plate (1145) both extend toward the first magnetic yoke assembly (113), the third attraction plate (1146) and the second attraction plate (1145) are spaced apart in a first direction, a side surface of the second attraction plate (1145) facing the third attraction plate (1146) is the third attraction portion (1141), a side surface of the third attraction plate (1146) facing the second attraction plate (1145) is the fourth attraction portion (1142), and the first armature (122) and the second armature (123) are disposed between the second attraction plate (1145) and the third attraction plate (1146).

6. The electromagnetic system according to claim 1, characterized in that The armature unit (12) further comprises a cover shell (124), wherein the cover shell (124) is arranged to cover the outer side of the permanent magnet component (121); The first end of the first armature (122) passes through the cover shell (124), and the first end and the second end of the first armature (122) are placed on two opposite sides outside the cover shell (124); The first end of the second armature (123) passes through the cover shell (124), and the first end and the second end of the second armature (123) are placed on two opposite sides outside the cover shell (124).

7. The electromagnetic system according to claim 6, characterized in that The cover shell (124) is provided with sliding parts (125) on two opposite sides thereof, respectively. The sliding parts (125) are used for being slidably connected with the housing of the magnetic latching relay.

8. The electromagnetic system according to claim 6, characterized in that The cover shell (124) is also provided with a connecting portion (126), and the connecting portion (126) is used to be connected to a moving contact assembly of a magnetic latching relay.

9. The electromagnetic system according to claim 1, characterized in that The coil unit (11) further comprises a coil sleeve (115), the coil (111) being wound on the coil sleeve (115), a first mounting seat (116) and a second mounting seat (117) being provided at two ends of the coil sleeve (115), the iron core (112) being placed in the coil sleeve (115), and the first mounting seat (116) and the second mounting seat (117) being passed through at two ends of the iron core (112), a first receiving groove (1161) being provided on the first mounting seat (116), a first end of the first magnetic yoke assembly (113) being placed in the first receiving groove (1161) and being connected to the iron core (112), a second receiving groove (1171) being provided on the second mounting seat (117), and a first end of the second magnetic yoke assembly (114) being placed in the second receiving groove (1171) and being connected to the iron core (112).

10. A magnetic latching relay, characterized in that: It comprises a housing, a stationary contact assembly, a moving contact assembly and an electromagnetic system as described in any one of claims 1 to 9, wherein the stationary contact assembly, the moving contact assembly and the electromagnetic system are all arranged in the housing, the moving contact assembly is connected to an armature unit (12) of the electromagnetic system, and the armature unit (12) moves to make the moving contact assembly and the stationary contact assembly close or disconnect.

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