Electromagnetic system and magnetic latching relay

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and particularly discloses an electromagnetic system and a magnetic latching relay. 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] This utility model relates to the field of low-voltage electrical technology, and in particular to an electromagnetic system and a magnetic latching relay. Background Technology

[0002] A magnetic latching relay is an electronic switch that connects and disconnects a load circuit. When a pulse voltage is applied to the coil of the magnetic latching relay, the magnetic circuit structure of the relay generates a constant magnetic field. Due to the action of this constant magnetic field, the magnetic latching relay remains in the closed or open state.

[0003] Currently, magnetic latching relays are driven by pulse signals and maintain their current state using internal permanent magnets. The electromagnetic system of magnetic latching relays is mostly a rotating structure, making it difficult to increase the safe distance between the moving and stationary contact groups within a limited space. For direct-acting magnetic latching relays, an air gap forms between the armature connected to the permanent magnet and the yoke of the coil assembly when the permanent magnet slides relative to the coil assembly. This results in low magnetic efficiency, requiring a larger driving force to slide the permanent magnet, and again, it is difficult to increase the safe distance between the moving and stationary contact groups within a limited space. Utility Model Content

[0004] The purpose of this invention is to provide an electromagnetic system and a magnetic latching relay, which improves the breaking capacity of the magnetic latching relay and increases the safe distance between the moving contact assembly and the stationary contact assembly in a limited space.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[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, comprising a coil, an iron core, a first magnetic yoke assembly, and a second magnetic yoke assembly, wherein the coil is sleeved on the outside of the iron core, and the two ends of the iron core are connected to the first magnetic yoke assembly and the second magnetic yoke assembly, wherein the first magnetic yoke assembly comprises a first attraction part and a second attraction part, and the second magnetic yoke assembly comprises a third attraction part and a fourth attraction part;

[0008] An armature unit includes a permanent magnet. The two magnetic ends of the permanent magnet are connected to a first armature and a second armature. The armature unit is movable relative to the coil. When the magnetic latching relay is open, the first end of the first armature is attracted to the first engaging part, and the second end of the second armature is attracted to the fourth engaging part, forming a first magnetic circuit. When the magnetic latching relay is closed, the second end of the first armature is attracted to the third engaging part, and the first end of the second armature is attracted to the second engaging part, forming a second magnetic circuit.

[0009] As an optional technical solution for the above-mentioned electromagnetic system, the first magnetic yoke assembly further includes a first yoke iron, the first end of the first yoke iron being connected to the first end of the iron core, and the second end of the first yoke iron being provided with a first attracting part and a second attracting part, the first attracting part and the second attracting part being disposed between the first armature and the second armature, with the first attracting part facing the first armature and the second attracting part facing the second armature.

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

[0011] As an optional technical solution for the above-mentioned electromagnetic system, the second magnetic yoke assembly further 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 attractive part, and the second end of the third yoke is provided with a fourth attractive part. The third attractive part and the fourth attractive part are spaced apart in a first direction, and the first armature and the second armature are disposed between the third attractive part and the fourth attractive part.

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

[0013] As an optional technical solution for the aforementioned electromagnetic system, the armature unit further includes a cover, which is disposed on the outside of the permanent magnet component;

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

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

[0016] As an alternative technical solution for the aforementioned electromagnetic system, the housing is provided with sliding portions on its other opposite sides, which are used to slide in connection with the housing of the magnetic latching relay.

[0017] As an optional technical solution for the aforementioned electromagnetic system, the housing is further provided with a connecting part, which is used to connect to the moving contact assembly of the magnetic latching relay.

[0018] As an optional technical solution for the aforementioned electromagnetic system, the coil unit further includes a coil sleeve, the coil is wound on the coil sleeve, the two ends of the coil sleeve are provided with a first mounting seat and a second mounting seat, the iron core is placed inside the coil sleeve, and the two ends of the iron core pass through the first mounting seat and the second mounting seat, the first mounting seat is provided with a first receiving groove, the first end of the first magnetic yoke assembly is placed in the first receiving groove and connected to the iron core, the second mounting seat is provided with a second receiving groove, the first end of the second magnetic yoke assembly is placed in the second receiving groove and connected to the iron core.

[0019] Secondly, a magnetic latching relay is provided, including a housing, a stationary contact assembly, a moving contact assembly, and the aforementioned electromagnetic system. The stationary contact assembly, the moving contact assembly, and the electromagnetic system are all disposed within the housing. The moving contact assembly is connected to the armature unit of the electromagnetic system. The armature unit is movable to cause the moving contact assembly to engage or disengage with the stationary contact assembly.

[0020] The beneficial effects of this utility model are:

[0021] The electromagnetic system provided by this utility model, when the magnetic latching relay is open, has its first end of the first armature attracted to the first engaging part, and its second end of the second armature attracted to the fourth engaging part, forming a first magnetic circuit, thus keeping the magnetic latching relay in an open state; when the magnetic latching relay is closed, its second end of the first armature attracted to the third engaging part, and its first end of the second armature attracted to the second engaging part, forming a second magnetic circuit, thus keeping the magnetic latching relay in a closed state; both the first and second magnetic circuits are closed-loop magnetic circuits, with no air gap between the engaging part and the armature, improving the magnetic engagement efficiency and thus improving the breaking capacity of the magnetic latching relay; furthermore, applying different pulse current signals to the coil realizes the opening or closing of the magnetic latching relay, and the structure of the armature and engaging part is relatively compact, reducing the space occupied, and this electromagnetic system is a direct-acting electromagnetic system, thus increasing the safe distance between the moving contact assembly and the stationary contact assembly in a limited space. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the electromagnetic system provided in this embodiment of the utility model;

[0023] Figure 2 This is a state diagram of the electromagnetic system when the magnetic latching relay is in the off state, as provided in this embodiment of the utility model.

[0024] Figure 3 This is a state diagram of the electromagnetic system when the magnetic latching relay is in the closed state, as provided in this embodiment of the utility model.

[0025] Figure 4 This is a schematic diagram of the overall structure of the coil unit provided in this embodiment of the utility model;

[0026] Figure 5 This is an exploded view of the coil unit provided in this embodiment of the utility model;

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

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

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

[0030] Figure 9 This is a schematic diagram of the structure of an electromagnetic system provided in another embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the overall structure of the armature unit provided in this embodiment of the utility model.

[0032] In the picture:

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

[0034] 111. Coil; 112. Iron core; 113. First yoke assembly; 1131. First attracting part; 1132. Second attracting part; 1133. First yoke iron; 1134. First attracting plate; 1135. Fourth yoke iron; 1136. Fourth attracting plate; 114. Second yoke assembly; 1141. Third attracting part; 1142. Fourth attracting part; 1143. Second yoke iron; 1144. Third yoke iron; 1145. Second attracting plate; 1146. Third attracting plate; 115. Coil sleeve; 116. First mounting base; 1161. First receiving groove; 117. Second mounting base; 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 Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in 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 magnetic yoke assembly 113, and a second magnetic yoke assembly 114. The coil 111 is sleeved on the outside of the iron core 112, and the first magnetic yoke assembly 113 and the second magnetic yoke assembly 114 are connected to both ends of the iron core 112. The first magnetic yoke assembly 113 includes a first attracting portion 1131 and a second attracting portion 1132, and the second magnetic yoke assembly 114 includes a third attracting portion 1141 and a fourth attracting portion 1142. The armature unit 12 includes a permanent magnet 121. The 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 open, 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, forming a first magnetic circuit a. When the magnetic latching 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, forming a second magnetic circuit b.

[0042] When the magnetic latching relay is open, the first end of the first armature 122 engages with the first engaging part 1131, and the second end of the second armature 123 engages with the fourth engaging part 1142. Simultaneously, the first end of the second armature 123 separates from the second engaging part 1132, and the second end of the first armature 122 separates from the third engaging part 1141, forming the first magnetic circuit a, thus placing the magnetic latching relay in the open state. When the magnetic latching relay is closed, the second end of the first armature 122 engages with the third engaging part 1141, the first end of the second armature 123 engages with the second engaging part 1132, and the second end of the second armature 123 separates from the fourth engaging part 1142. When the first end of the first armature 122 separates from the first engaging part 1131, a second magnetic circuit b is formed, which puts the magnetic latching relay in a closed state. Both the first magnetic circuit a and the second magnetic circuit b are closed-loop magnetic circuits, and there is no air gap between the engaging part and the armature, which improves the magnetic engagement efficiency and thus improves the breaking capacity of the magnetic latching relay. In addition, different pulse current signals are applied to the coil 111 to realize the opening or closing of the magnetic latching relay. The structure of the armature and the engaging part is relatively compact, which reduces the space occupied. Moreover, the electromagnetic system is a direct-acting electromagnetic system, which can increase the safe distance between the moving contact assembly and the stationary contact assembly in a limited space.

[0043] Further explanation is needed: coil 111 is connected to a power source. When a first pulse signal is applied to coil 111, the first end of the first armature 122 engages with the first attracting part 1131, and the second end of the second armature 123 engages with the fourth attracting part 1142, forming the first magnetic circuit a, and the magnetic latching relay is in an open state. When a second pulse signal is applied to coil 111, the second end of the first armature 122 engages with the third attracting part 1141, and the first end of the second armature 123 engages with the second attracting part 1132, forming the second magnetic circuit b, and the magnetic latching 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 direction of movement of the permanent magnet 121 is 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, with the coil 111 wound around the coil sleeve 115. The coil sleeve 115 has a first mounting seat 116 and a second mounting seat 117 at both ends. The iron core 112 is placed inside the coil sleeve 115, and the first mounting seat 116 and the second mounting seat 117 pass through both ends of the iron core 112. The first mounting seat 116 has a first receiving groove 1161. The first end of the first magnetic yoke assembly 113 is placed inside the first receiving groove 1161 and connected to the iron core 112. The second mounting seat 117 has a second receiving groove 1171. The first end of the second magnetic yoke assembly 114 is placed inside the second receiving groove 1171 and 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 base 116 and the second mounting base 117 serve to fix the first magnetic yoke assembly 113 and the second magnetic yoke assembly 114, so that the coil 111, the iron core 112, the first magnetic yoke assembly 113 and the second magnetic yoke assembly 114 form a stable connection structure.

[0045] In some embodiments, continue to refer to Figure 2 and Figure 3As shown, the first 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 a first attracting portion 1131 and a second attracting portion 1132. The first attracting portion 1131 and the second attracting portion 1132 are disposed between the first armature 122 and the second armature 123, with the first attracting portion 1131 facing towards the first armature 122 and the second attracting portion 1132 facing towards the second armature 123. This structure is simple and provides sufficient space for the movement of the first armature 122 and the second armature 123, thereby increasing the safe distance between the moving contact assembly and the stationary contact assembly within a limited space. When the permanent magnet 121 moves along the first direction, the first armature 122 can be attracted to the first attracting part 1131, while the second armature 123 is separated from the second attracting part 1132, or the second armature 123 is attracted to the second attracting part 1132, while the first armature 122 is separated from the first attracting part 1131.

[0046] 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 and is positioned between the first armature 122 and the second armature 123. The surface of the first suction plate 1134 facing the first armature 122 is the first suction portion 1131, and the 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 integrally formed. The first yoke 1133 extends along a first direction, and the first suction plate 1134 and the first yoke 1133 are set at an angle. The first armature 122 and the first attracting part 1131, as well as the second armature 123 and the second attracting part 1132, are in surface contact with each other. The large contact area increases the magnetic attraction between the first armature 122 or the second armature 123 and the first magnetic yoke assembly 113, enabling the magnetic latching relay to be stably maintained in the closed or open state.

[0047] In some embodiments, the second yoke assembly 114 further includes a second yoke 1143 and a third yoke 1144. The first ends of the second yoke 1143 and 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 attracting portion 1141, and the second end of the third yoke 1144 is provided with a fourth attracting portion 1142. The third attracting portions 1141 and 1142 are spaced apart in a first direction. The first armature 122 and the second armature 123 are disposed between the third attracting portions 1141 and 1142. Moving the permanent magnet 121 along the first direction allows the first armature 122 to engage with the third attracting portion 1141 while the second armature 123 separates from the fourth attracting portion 1142, or vice versa. The distance between the third attraction part 1141 and the fourth attraction part 1142 defines the range of movement 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, and the second end of the third yoke 1144 is connected to a third suction plate 1146. Both the third suction plate 1146 and the second suction plate 1145 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 surface of the second suction plate 1145 facing the third suction plate 1146 is the third suction part 1141, and the surface of the third suction plate 1146 facing the second suction plate 1145 is the fourth suction part 1142. The first armature 122 and the second armature 123 are placed between the second suction plate 1145 and the third suction plate 1146. The second suction plate 1145 and the second yoke 1143 are integrally formed. The second yoke 1143 extends along the first direction, and the second suction plate 1145 and the second yoke 1143 are arranged 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 set at an angle. The first armature 122 and the third suction part 1141, as well as the second armature 123 and the fourth suction part 1142, are in surface contact with each other. The large contact area 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 or open state.

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

[0050] In some other embodiments, such as Figure 7 As shown, the second magnetic yoke assembly 114 includes a second yoke 1143. The first end of the second yoke 1143 is 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 side of the second suction plate 1145 facing the iron core 112 is a third suction part 1141, and the side of the second suction plate 1145 away from the iron core 112 is a fourth suction part 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 part 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 ends of the first yoke 1133 and 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 connected to the first end of the iron core 112. The plates 1136 are spaced apart in the first direction. The side of the first suction plate 1134 opposite to the fourth suction plate 1136 is the first suction part 1131, and the side of the fourth suction plate 1136 opposite to the first suction plate 1134 is the second suction part 1132. The first end of the first armature 122 is placed on the side of the first suction plate 1134 opposite to 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 opposite to the first suction plate 1134. The second yoke assembly 114 includes a second yoke 1143 and a third yoke 1144. The first ends of the second yoke 1143 and 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, and 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 a first direction. The side of the second suction plate 1145 facing the third suction plate 1146 is a third suction part 1141, and the side of the third suction plate 1146 facing the second suction plate 1145 is a fourth suction part 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 Figure 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 a first direction. The side of the first suction plate 1134 away from the fourth suction plate 1136 is the first suction part 1131, and the side of the fourth suction plate 1136 away from the first suction plate 1134 is the second suction part 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. The first end of the second yoke 1143 is 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 and a third suction plate 1146. The second suction plate 1145 and the third suction plate 1146 are spaced apart in a first direction. The side of the second suction plate 1145 facing the third suction plate 1146 is a third suction part 1141, and the side of the third suction plate 1146 facing the second suction plate 1145 is a fourth suction part 1142. The first armature 122 and the second armature 123 are placed between the second suction plate 1145 and the third suction plate 1146.

[0053] like Figure 10 As shown, the armature unit 12 also includes a cover 124, which covers the outside of the permanent magnet 121 to protect it from damage. The first end of the first armature 122 passes through the cover 124, and the first and second ends of the first armature 122 are located on opposite sides outside the cover 124. The first end of the second armature 123 passes through the cover 124, and the first and second ends of the second armature 123 are located on opposite sides outside the cover 124. Both ends of the first armature 122 and both ends of the second armature 123 are located outside the cover 124 to facilitate engagement between the armature and the attracting part.

[0054] Optionally, the housing 124 is provided with sliding portions 125 on its opposite sides. The sliding portions 125 are used to slide in connection with the housing of the magnetic latching relay to ensure that the armature unit 12 can move stably and that the armature and the engaging portion can engage precisely. The sliding portion 125 can be a sliding block, which is not specifically limited here.

[0055] The housing 124 is also provided with a connecting part 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 engages or disengages with the stationary contact assembly of the magnetic latching relay. The connecting part 126 includes a U-shaped member, and the two opposite inner side walls of the U-shaped member are respectively provided with sliding grooves. One end of the moving contact assembly is inserted into the sliding groove to fix the moving contact assembly on the housing 124. The structure is simple and easy to assemble.

[0056] This embodiment also provides a magnetic latching relay, including a housing, a stationary contact assembly, a moving contact assembly, and the aforementioned electromagnetic system. The stationary contact assembly, moving contact assembly, and electromagnetic system are all housed within the housing. The moving contact assembly is connected to the armature unit 12 of the electromagnetic system. The armature unit 12 moves to engage or disengage the moving contact assembly from the stationary contact assembly. The structures of the moving and stationary contact assemblies are existing technology and will not be described in detail here.

[0057] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electromagnetic system for use in a magnetic latching relay, characterized in that, The electromagnetic system includes: A coil unit (11) includes 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 two ends of the iron core (112) are connected to the first magnetic yoke assembly (113) and the second magnetic yoke assembly (114). The first magnetic yoke assembly (113) includes a first attraction part (1131) and a second attraction part (1132). The second magnetic yoke assembly (114) includes a third attraction part (1141) and a fourth attraction part (1142). The armature unit (12) includes a permanent magnet (121). The two magnetic 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 open, the first end of the first armature (122) is attracted to the first attracting part (1131), and the second end of the second armature (123) is attracted to the fourth attracting part (1142), forming a first magnetic circuit (a). When the magnetic latching relay is closed, the second end of the first armature (122) is attracted to the third attracting part (1141), and the first end of the second armature (123) is attracted to the second attracting part (1132), forming a second magnetic circuit (b).

2. The electromagnetic system according to claim 1, characterized in that, The first yoke assembly (113) further includes a first yoke (1133), the first end of the first yoke (1133) is connected to the first end of the iron core (112), and the second end of the first yoke (1133) is provided with a first attracting part (1131) and a second attracting part (1132). The first attracting part (1131) and the second attracting part (1132) are disposed between the first armature (122) and the second armature (123), and the first attracting part (1131) is disposed toward the first armature (122), and the second attracting part (1132) is disposed 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 suction plate (1134). The first suction plate (1134) extends toward the second magnetic yoke assembly (114). The first suction plate (1134) is placed 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 part (1131), and the side surface of the first suction plate (1134) facing the second armature (123) is the second suction part (1132).

4. The electromagnetic system according to any one of claims 1 to 3, characterized in that, The second 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 attracting part (1141), and the second end of the third yoke (1144) is provided with a fourth attracting part (1142). The third attracting part (1141) and the fourth attracting part (1142) are spaced apart in a first direction. The first armature (122) and the second armature (123) are disposed between the third attracting part (1141) and the fourth attracting part (1142).

5. The electromagnetic system according to claim 4, characterized in that, The second end of the second yoke (1143) is connected to the second suction plate (1145), and the second end of the third yoke (1144) is connected to the 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 a first direction. The side surface of the second suction plate (1145) facing the third suction plate (1146) is the third suction part (1141), and the side surface of the third suction plate (1146) facing the second suction plate (1145) is the fourth suction part (1142). The first armature (122) and the second armature (123) are placed between the second suction plate (1145) and the third suction plate (1146).

6. The electromagnetic system according to claim 1, characterized in that, The armature unit (12) also includes a cover (124), which is disposed on the outside of the permanent magnet (121); 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 and second ends of the second armature (123) are located on opposite sides outside the cover (124).

7. The electromagnetic system according to claim 6, characterized in that, The cover (124) has sliding portions (125) on its opposite sides, which are used to slide in connection with the housing of the magnetic latching relay.

8. The electromagnetic system according to claim 6, characterized in that, The housing (124) is also provided with a connecting part (126), which is used to connect with the moving contact assembly of the magnetic latching relay.

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

10. A magnetic latching relay, characterized in that, The device includes a housing, a stationary contact assembly, a moving contact assembly, and an electromagnetic system according to any one of claims 1-9. The stationary contact assembly, the moving contact assembly, and the electromagnetic system are all disposed within the housing. The moving contact assembly is connected to the armature unit (12) of the electromagnetic system. The armature unit (12) is movable to engage or disengage the moving contact assembly from the stationary contact assembly.

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