Magnetic latching relay

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and particularly discloses a magnetic latching relay. According to the magnetic latching relay provided by the utility model, no air gap exists between the attraction part and the armature in the first magnetic circuit and the second magnetic circuit, so that the magnetic attraction efficiency is improved, and the breaking capacity of the magnetic latching relay can be further improved; the structure that the armature and the attraction part are attracted is compact, the occupied space is reduced, the electromagnetic system is a direct-acting electromagnetic system, and the safety distance between the moving contact unit and the static contact unit can be increased in the limited space; the auxiliary contact unit is linked with the moving contact unit, the structure is simplified, the auxiliary contact unit is added, so that the magnetic latching relay has diversified functions, and the use flexibility of the magnetic latching relay is improved.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical technology, and in particular to 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 makes it difficult to increase the safe distance between the moving and stationary contact groups within a limited space. Furthermore, existing magnetic latching relays lack auxiliary contacts, limiting their functionality. Utility Model Content

[0004] The purpose of this utility model is to provide a magnetic latching relay with diversified functions, improved breaking capacity, and increased safety distance between the moving contact group and the stationary contact group in a limited space.

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

[0006] Magnetic latching relays include:

[0007] An electromagnetic system includes a coil unit and an armature unit. The coil unit includes a first attracting part, a second attracting part, a third attracting part, and a fourth attracting part. The armature unit includes a permanent magnet and a first armature and a second armature disposed at two magnetic ends of the permanent magnet.

[0008] A contact system includes a moving contact unit and a stationary contact unit. The moving contact unit is connected to the armature unit. The coil unit is energized to drive the armature unit to move along a first direction, thereby disconnecting the moving contact unit from the stationary contact unit. The first end of the first armature is attracted to the first attraction part, and the second end of the second armature is attracted to the fourth attraction part, forming a first magnetic circuit. Alternatively, the moving contact unit is attracted to the stationary contact unit, the second end of the first armature is attracted to the third attraction part, and the first end of the second armature is attracted to the second attraction part, forming a second magnetic circuit.

[0009] An auxiliary contact unit includes an auxiliary moving contact and an auxiliary stationary contact. When the armature unit moves to make the moving contact unit engage with the stationary contact unit, the armature unit makes the auxiliary moving contact engage with the auxiliary stationary contact.

[0010] As an optional technical solution for the aforementioned magnetic latching relay, the coil unit further includes 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, and the two ends of the iron core are respectively connected to the first magnetic yoke assembly and the second magnetic yoke assembly. The first magnetic yoke assembly includes a first attraction part and a second attraction part, and the second magnetic yoke assembly includes a third attraction part and a fourth attraction part.

[0011] As an optional technical solution for the aforementioned magnetic latching relay, the first magnetic yoke assembly 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 portion and a second attracting portion. The first attracting portion and the second attracting portion are disposed between the first armature and the second armature, with the first attracting portion facing the first armature and the second attracting portion facing the second armature.

[0012] As an optional technical solution for the aforementioned magnetic latching relay, 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.

[0013] As an optional technical solution for the aforementioned magnetic latching relay, the second magnetic yoke assembly 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 engaging portion, and the second end of the third yoke is provided with a fourth engaging portion. The third engaging portion and the fourth engaging portion are spaced apart in a first direction, and the first armature and the second armature are disposed between the third engaging portion and the fourth engaging portion.

[0014] As an optional technical solution for the aforementioned magnetic latching relay, 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.

[0015] As an optional technical solution for the aforementioned magnetic latching relay, the magnetic latching relay further includes a base and a fixing plate. The electromagnetic system, the contact system, and the auxiliary contact unit are all disposed within the base. The fixing plate is disposed at the opening of the base and connected to the base. The armature unit is slidably connected to the base and the fixing plate along a first direction, and the moving contact unit is slidably connected to the base and the fixing plate along the first direction.

[0016] As an optional technical solution for the aforementioned magnetic latching relay, the armature unit further includes a housing, the permanent magnet is disposed inside the housing, the first end of the first armature passes through the housing, and the first end and the second end of the first armature are located on opposite sides outside the housing, the first end of the second armature passes through the housing, and the first end and the second end of the second armature are located on opposite sides outside the housing, and sliding portions are respectively provided on the other opposite sides of the housing, one of the sliding portions being slidably connected to the fixed plate, and the other sliding portion being slidably connected to the base.

[0017] As an optional technical solution for the aforementioned magnetic latching relay, the fixing plate is provided with a first sliding hole, the sliding part passes through the first sliding hole and is connected to a shielding plate, and the shielding plate blocks the gap between the first sliding hole and the sliding part.

[0018] As an optional technical solution for the aforementioned magnetic latching relay, the fixing plate includes a first plate, and a second plate is provided on both sides opposite to the first end of the first plate. A first latching part is provided on each of the second plates, and a second latching part is provided on both sides opposite to the second end of the first plate. The base is provided with a third latching part that latches with the first latching part and a fourth latching part that latches with the second latching part.

[0019] As an optional technical solution for the aforementioned magnetic latching relay, the moving contact unit includes a bracket, a conductive bridge, an overtravel spring, and a reaction spring. The bracket is connected to the armature unit. The conductive bridge, the overtravel spring, and the reaction spring are respectively fixed on the bracket. The conductive bridge is used to engage with the stationary contact unit. The two ends of the overtravel spring elastically press against the conductive bridge. The overtravel spring is configured to apply a force that engages the conductive bridge with the stationary contact unit. The two ends of the reaction spring elastically abut against the base. The reaction spring is configured to apply a force to the bracket that separates the conductive bridge from the stationary contact unit.

[0020] As an optional technical solution for the aforementioned magnetic latching relay, the auxiliary moving contact includes a moving spring. One end of the moving spring is provided with an auxiliary moving contact and a trigger portion. When the armature unit moves to make the moving contact unit engage with the stationary contact unit, the armature unit presses against the trigger portion and makes the auxiliary moving contact engage with the auxiliary stationary contact.

[0021] The beneficial effects of this utility model are:

[0022] The magnetic latching relay provided by this utility model, when the moving contact unit and the stationary contact unit are disconnected, has its first end of the first armature attracted to the first engaging part, and its first end of the second armature attracted to the fourth engaging part, forming a first magnetic circuit, thus putting the magnetic latching relay in an open state. When the moving contact unit and the stationary contact unit are engaged, the second end of the first armature is attracted to the third engaging part, and the second end of the second armature is attracted to the second engaging part, forming a second magnetic circuit, thus putting the magnetic latching relay in a closed state. In the first and second magnetic circuits, 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. The structure of the armature and engaging part being engaged is relatively compact, reducing the space occupied. Moreover, this electromagnetic system is a direct-acting electromagnetic system, which can increase the safe distance between the moving contact unit and the stationary contact unit in a limited space. The auxiliary contact unit is linked with the moving contact unit, simplifying the structure. Adding the auxiliary contact unit diversifies the function of the magnetic latching relay and improves the flexibility of its use. Attached Figure Description

[0023] Figure 1 This is an exploded view of the magnetic latching relay provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the overall structure of the electromagnetic system provided in this embodiment of the utility model;

[0025] Figure 3 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.

[0026] Figure 4 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.

[0027] Figure 5 This is a schematic diagram of the overall structure of the coil unit provided in this embodiment of the utility model;

[0028] Figure 6 This is an exploded view of the coil unit provided in this embodiment of the utility model;

[0029] Figure 7 This is a schematic diagram of the structure of an electromagnetic system provided in another embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of an electromagnetic system provided in another embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of an electromagnetic system provided in another embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure of an electromagnetic system provided in another embodiment of the present invention;

[0033] Figure 11 This is an isometric view of the internal structure of the magnetic latching relay provided in this embodiment of the present invention;

[0034] Figure 12 This is a front view of the internal structure of the magnetic latching relay provided in this embodiment of the utility model;

[0035] Figure 13 This is a schematic diagram of the internal structure of the base provided in this embodiment of the utility model;

[0036] Figure 14 This is a schematic diagram of the structure of the fixing plate provided in an embodiment of the present utility model;

[0037] Figure 15 This is a schematic diagram of the armature unit provided in this embodiment of the utility model;

[0038] Figure 16 This is a schematic diagram of the cooperation structure between the sliding part and the outer shell provided in an embodiment of this utility model;

[0039] Figure 17 This is an axonometric view of the moving contact unit provided in an embodiment of the present invention;

[0040] Figure 18 This is a front view of the moving contact unit provided in this embodiment of the utility model;

[0041] Figure 19 This is an exploded view of the moving contact unit provided in this embodiment of the utility model;

[0042] Figure 20 This is a schematic diagram of the structure of the auxiliary contact unit placed inside the base according to an embodiment of the present invention;

[0043] Figure 21 This is a schematic diagram of the electromagnetic system, contact system, and auxiliary contact unit provided in an embodiment of the present invention;

[0044] Figure 22 This is a schematic diagram of the structure of the auxiliary contact unit provided in an embodiment of this utility model.

[0045] In the picture:

[0046] 1. Electromagnetic system; 2. Contact system; 3. Auxiliary contact unit; 4. Base; 5. Fixing plate; 6. Shielding plate; 7. Housing; 8. Pin; 9. Magnetic assembly;

[0047] 11. Coil unit; 111. Coil; 1111. Third lead-out terminal; 1112. Fourth lead-out terminal; 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; 1144, Third yoke; 1145, Second suction plate; 1146, Third suction plate; 115, Coil sleeve; 116, First mounting base; 1161, First receiving groove; 117, Second mounting base; 1171, Second receiving groove; 12, Armature unit; 121, Permanent magnet; 122, First armature; 123, Second armature; 124, Cover; 125, Sliding part; 126, Connecting part;

[0048] 21. Moving contact unit; 211. Bracket; 2111. Upper bracket; 2112. Lower bracket; 2113. Slider; 2114. Snap-fit ​​block; 2115. Snap-fit ​​hole; 2116. First positioning post; 2117. Second positioning post; 2118. Protruding ridge; 212. Conductive bridge; 2121. First positioning hole; 213. Reaction spring; 214. Overtravel spring; 2141. Second positioning hole; 215. Moving contact; 22. Stationary contact unit; 221. Stationary contact;

[0049] 31. Auxiliary moving contact; 311. Moving spring; 312. Auxiliary moving contact; 313. Triggering part; 314. Moving contact plate; 315. First lead-out end; 32. Auxiliary stationary contact; 321. Stationary contact plate; 322. Auxiliary stationary contact; 323. Second lead-out end;

[0050] 41. Third snap-fit ​​part; 42. Fourth snap-fit ​​part; 43. Third sliding hole; 44. Fourth sliding hole; 45. Base groove;

[0051] 51. First sliding joint hole; 52. First plate; 53. Second plate; 54. First snap-fit ​​part; 55. Second snap-fit ​​part; 56. Fifth sliding joint hole; 57. Rib;

[0052] 71. Second sliding joint hole;

[0053] 91. Metal casing; 92. Magnet;

[0054] a) First magnetic circuit; b) Second magnetic circuit. Detailed Implementation

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] like Figures 1 to 4 As shown, this embodiment provides a magnetic latching relay, which includes an electromagnetic system 1, a contact system 2, and an auxiliary contact unit 3. The electromagnetic system 1 includes a coil unit 11 and an armature unit 12. The coil unit 11 includes a first attracting part 1131, a second attracting part 1132, a third attracting part 1141, and a fourth attracting part 1142. The armature unit 12 includes a permanent magnet 121 and a first armature 122 and a second armature 123 disposed at the two magnetic ends of the permanent magnet 121. The contact system 2 includes a moving contact unit 21 and a stationary contact unit 22. The moving contact unit 21 is connected to the armature unit 12. The coil unit 11 is energized to drive the armature unit 12 to move along a first direction, causing the moving contact unit 21 to disconnect from the stationary contact unit 22. 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. Alternatively, the moving contact unit 21 is attracted to the stationary contact unit 22, 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. The auxiliary contact unit 3 includes an auxiliary moving contact 31 and an auxiliary stationary contact 32. When the armature unit 12 moves to make the moving contact unit 21 and the stationary contact unit 22 engage, the armature unit 12 makes the auxiliary moving contact 31 and the auxiliary stationary contact 32 engage.

[0060] When the moving contact unit 21 is disconnected from the stationary contact unit 22, the first end of the first armature 122 engages with the first engaging part 1131, and the first end of the second armature 123 engages with the fourth engaging part 1142, forming a first magnetic circuit a, which puts the magnetic latching relay in the open state; when the moving contact unit 21 is engaged with the stationary contact unit 22, the second end of the first armature 122 engages with the third engaging part 1141, and the second end of the second armature 123 engages with the second engaging part 1132, forming a second magnetic circuit b, which puts the magnetic latching relay in the closed state; in the first In magnetic circuit a and the second magnetic circuit b, there is no air gap between the attraction part and the armature, which improves the magnetic attraction efficiency and thus improves the breaking capacity of the magnetic latching relay. The structure of the armature and the attraction part is relatively compact, reducing the space occupied. Moreover, the electromagnetic system 1 is a direct-acting electromagnetic system, which can increase the safe distance between the moving contact unit 21 and the stationary contact unit 22 in a limited space. The auxiliary contact unit 3 is linked with the moving contact unit 21, which simplifies the structure. The addition of the auxiliary contact unit 3 makes the magnetic latching relay more versatile and improves the flexibility of its use.

[0061] The coil unit 11 also 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 respectively 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 coil 111 is connected to a power source. When a first pulse signal is applied to the coil 111, 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, and the magnetic latching circuit 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 engaging part 1141, and the first end of the second armature 123 engages with the second engaging 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.

[0062] like Figure 5 and Figure 6As 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.

[0063] In some embodiments, continue to refer to Figure 3 and Figure 4 As 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 first end of the first yoke 1133 is placed within the first receiving groove 1161. 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 unit and the stationary contact unit 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.

[0064] 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.

[0065] 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, and the first ends of the second yoke 1143 and the third yoke 1144 are both placed in the second receiving groove 1171. 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 portion 1141 and the fourth attracting portion 1142 are spaced apart in a first direction, and the first armature 122 and the second armature 123 are disposed between the third attracting portion 1141 and the fourth attracting portion 1142. The permanent magnet 121 can move along the first direction to achieve the following: the first armature 122 can be attracted to the third attracting part 1141, while the second armature 123 can be separated from the fourth attracting part 1142; or the second armature 123 can be attracted to the fourth attracting part 1142, while the first armature 122 can be separated from the third attracting part 1141. The distance between the third attracting part 1141 and the fourth attracting part 1142 defines the range of movement of the permanent magnet 121 in the first direction.

[0066] 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.

[0067] In some other embodiments, such as Figure 7 As 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.

[0068] In some other embodiments, such as Figure 8As 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.

[0069] In some other embodiments, such as Figure 9 As 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.

[0070] In some other embodiments, such as Figure 10As 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.

[0071] In some embodiments, combined with Figures 11 to 13 As shown, the magnetic latching relay also includes a base 4 and a fixing plate 5. The electromagnetic system 1, the contact system 2, and the auxiliary contact unit 3 are all disposed within the base 4. The fixing plate 5 is disposed at the opening of the base 4 and connected to the base 4. The armature unit 12 is slidably connected to the base 4 and the fixing plate 5 along a first direction, and the moving contact unit 21 is slidably connected to the base 4 and the fixing plate 5 along the first direction. The base 4 and the fixing plate 5 serve to position the moving contact unit 21 and the armature unit 12, and provide guidance for the sliding of the moving contact unit 21 and the armature unit 12. During assembly, the electromagnetic system 1, the contact system 2, and the auxiliary contact unit 3 are first placed on the base 4, and the armature unit 12 and the moving contact unit 21 are slidably connected to the base 4. Then, the fixing plate 5 is fixed to the base 4, while the armature unit 12 and the moving contact unit 21 are slidably connected to the fixing plate 5.

[0072] Optionally, such as Figure 13 and Figure 14As shown, the fixing plate 5 includes a first plate 52, and second plates 53 are respectively provided on opposite sides of the first end of the first plate 52. First engaging portions 54 are respectively provided on the second plates 53, and second engaging portions 55 are respectively provided on opposite sides of the second end of the first plate 52. The base 4 is provided with a third engaging portion 41 that engages with the first engaging portions 54, and a fourth engaging portion 42 that engages with the second engaging portions 55. Compared with the prior art, the fixing plate 5 provided in this embodiment only covers part of the opening of the base 4, which saves material while ensuring that the moving contact unit 21 and the armature unit 12 can slide stably within the base 4.

[0073] Alternatively, the first snap-fit ​​portion 54 and the second snap-fit ​​portion 55 are both grooves, and the third snap-fit ​​portion 41 and the fourth snap-fit ​​portion 42 are both protrusions. The protrusions are inserted into the grooves, which serves to fix the fixing plate 5 to the base 4.

[0074] See Figures 12 to 15 As shown, the armature unit 12 also includes a cover 124, with the permanent magnet 121 disposed inside the cover 124 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 positioned on opposite sides outside the cover 124. The first end of the second armature 123 also passes through the cover 124, and the first and second ends of the second armature 123 are positioned on opposite sides outside the cover 124 to facilitate engagement between the armature and the attracting part. Sliding parts 125 are provided on the other opposite sides of the cover 124. One sliding part 125 is slidably connected to the fixing plate 5, and the other sliding part 125 is slidably connected to the base 4, thus realizing the sliding connection between the armature unit 12 and the base 4 and the fixing plate 5.

[0075] Optionally, the fixing plate 5 is provided with a first sliding hole 51, the sliding part 125 passes through the first sliding hole 51 and is connected to a shielding plate 6. The shielding plate 6 blocks the gap between the first sliding hole 51 and the sliding part 125, which improves the pollution protection performance of the magnetic latching relay and also improves the stability of the sliding connection between the sliding part 125 and the fixing plate 5, preventing the sliding part 125 from detaching from the fixing plate 5.

[0076] The fixed plate 5 has two ribs 57 on one side of the shielding plate 6. The two ribs 57 are spaced apart on both sides of the first sliding hole 51. The shielding plate 6 slides between the two ribs 57, and the two ribs 57 limit the sliding of the shielding plate 6.

[0077] like Figures 14 to 16As shown, the end face of the sliding part 125, which is slidably connected to the fixed plate 5, is provided with a marking line or a straight-line indicator groove. A housing 7 covers the outer side of the base 4 and the fixed plate 5. The housing 7 has a second sliding hole 71, which extends in the same direction as the first sliding hole 51. The housing 7 has indicators such as "ON" indicating the main circuit is on and "OFF" indicating the main circuit is off. The end of the sliding part 125 corresponds to the second sliding hole 71, allowing observation of the sliding part 125 through the second sliding hole 71. When the main circuit is on, the marking line or indicator groove of the sliding part 125 corresponds to "ON"; when the main circuit is off, the marking line or indicator groove of the sliding part 125 corresponds to "OFF," facilitating the operator's understanding of the main circuit's operating status.

[0078] See also Figure 13 As shown, another sliding part 125 on the cover 124 is slidably connected to the base 4. Optionally, the bottom of the base 4 is provided with a third sliding hole 43, and the sliding part 125 is slidably disposed in the third sliding hole 43.

[0079] In some embodiments, such as Figures 17 to 19 As shown, the moving contact unit 21 includes a bracket 211, a conductive bridge 212, an overtravel spring 214, and a reaction spring 213. The bracket 211 is connected to the armature unit 12. The conductive bridge 212, the overtravel spring 214, and the reaction spring 213 are respectively fixed on the bracket 211. The conductive bridge 212 is used to engage with the stationary contact unit 22. The two ends of the overtravel spring 214 elastically press against the conductive bridge 212. The overtravel spring 214 is configured to apply a force to engage the conductive bridge 212 with the stationary contact unit 22, thereby improving the engagement capability of the conductive bridge 212 with the stationary contact unit 22. The two ends of the reaction spring 213 elastically abut against the base 4. The reaction spring 213 is configured to apply a force to the bracket 211 to break the conductive bridge 212 from the stationary contact unit 22, thereby improving the breaking capability of the moving contact unit 21 of the magnetic latching relay with the stationary contact unit 22.

[0080] Optionally, the bracket 211 includes an upper bracket 2111 and a lower bracket 2112, with sliders 2113 on opposite sides of the lower bracket 2112, one of which is used to engage with... Figure 13 The base 4 shown is slidably connected, and another slider 2113 is used to connect with, as shown in the figure. Figure 14The fixed plate 5 is shown as a connection. Specifically, the base 4 is provided with a fourth sliding hole 44, in which one of the sliders 2113 is slidably connected. The fixed plate 5 is provided with a fifth sliding hole 56, in which the slider 2113 is slidably connected. The lower bracket 2112 is provided with a locking block 2114 on one side where the slider 2113 is located. The locking block 2114 and the slider 2113 are spaced apart. The lower bracket 2112 between the locking block 2114 and the slider 2113 is recessed with an insertion groove. The reaction spring 213 passes through the gap between the locking block 2114 and the slider 2113 and is inserted into the insertion groove. Both insertion grooves are provided with reaction springs 213. When the magnetic latching relay is tripped, the two ends of the reaction spring 213 press against the base 4. The upper bracket 2111 has a U-shaped structure. The two side walls of the upper bracket 2111 are respectively provided with snap-fit ​​holes 2115. The snap-fit ​​block 2114 can be snapped into the snap-fit ​​hole 2115, realizing the connection between the upper bracket 2111 and the lower bracket 2112, while fixing the reaction spring 213 in the insertion slot.

[0081] After the upper bracket 2111 and the lower bracket 2112 are connected, a space is formed between the end of the lower bracket 2112 and the upper bracket 2111 for the conductive bridge 212 to pass through. In order to fix the conductive bridge 212 in this space, the upper bracket 2111 is provided with a first positioning post 2116, and the middle part of the conductive bridge 212 is provided with a first positioning hole 2121. The first positioning post 2116 is inserted into the first positioning hole 2121. The lower bracket 2112 has a second positioning post 2117 at its end and a second positioning hole 2141 in the middle of the overtravel spring 214. The second positioning post 2117 is inserted into the second positioning hole 2141. The two ends of the overtravel spring 214 elastically press against the conductive bridge 212, so that the conductive bridge 212 is fixed on the upper bracket 2111. A force is applied to the conductive bridge 212 to make the conductive bridge 212 attract with the stationary contact unit 22, thereby improving the attraction capability between the conductive bridge 212 and the stationary contact unit 22.

[0082] Combination Figure 15 and Figure 19 As shown, the lower bracket 2112, at one end opposite to the upper bracket 2111, is connected to the armature unit 12. Specifically, the housing 124 is also provided with a connecting part 126, which is used to connect with the lower bracket 2112 so that the moving contact unit 21 moves synchronously with the armature unit 12, and the moving contact unit 21 engages or disengages from the stationary contact unit 22. The connecting part 126 includes a U-shaped part, with sliding grooves on the opposite inner side walls of the U-shaped part. The lower bracket 2112 has protruding ribs 2118 on opposite sides at its end, which are inserted into the corresponding sliding grooves to fix the moving contact unit 21 onto the housing 124. The structure is simple and easy to assemble.

[0083] The conductive bridge 212 has moving contacts 215 at both ends, and the stationary contact unit 22 includes a stationary contact 221. The moving contact 215 engages or disengages with the corresponding stationary contact 221. The structure of the stationary contact unit 22 is existing technology and will not be described in detail here.

[0084] In some embodiments, such as Figures 20 to 22 As shown, the auxiliary moving contact 31 includes a moving spring 311. One end of the moving spring 311 is provided with an auxiliary moving contact 312 and a triggering part 313. When the armature unit 12 moves to make the moving contact unit 21 engage with the stationary contact unit 22, the armature unit 12 presses against the triggering part 313 and makes the auxiliary moving contact 312 engage with the auxiliary stationary contact 32. Specifically, the first armature 122 presses against the triggering part 313 to make the auxiliary moving contact 312 engage with the auxiliary stationary contact 32. When the armature unit 12 moves to make the moving contact unit 21 separate from the stationary contact unit 22, the first armature 122 separates from the triggering part 313, the moving spring 311 returns to its original position due to its own elasticity, and the auxiliary moving contact 312 separates from the auxiliary stationary contact 32. Optionally, the triggering part 313 includes a trigger plate, one end of which is connected to one end of the moving spring 311. The trigger plate and the auxiliary moving contact 312 are connected to the moving spring 311 at one point. The force applied by the first armature 122 to the moving spring 311 is closer to the auxiliary moving contact 312, ensuring that the auxiliary moving contact 312 and the auxiliary stationary contact 32 can be stably attracted.

[0085] The auxiliary moving contact 31 also includes a moving contact plate 314. The other end of the moving spring 311 is fixedly connected to one end of the moving contact plate 314. The other end of the moving contact plate 314 is provided with a first lead-out end 315, and the first lead-out end 315 is connected to a pin 8. The auxiliary stationary contact 32 includes a stationary contact plate 321 and an auxiliary stationary contact 322. One end of the stationary contact plate 321 is provided with an auxiliary stationary contact 322, and the other end of the stationary contact plate 321 is provided with a second lead-out end 323, and the second lead-out end 323 is connected to a pin 8. The two pins 8 are used to make electrical connections with external circuits.

[0086] In addition, the coil 111 of the coil unit 11 is connected to a third lead 1111 and a fourth lead 1112. The third lead 1111 and the fourth lead 1112 are respectively connected to pins 8. The pins 8 are used to connect to an external power supply to provide pulse voltage to the coil 111.

[0087] Reference Figure 13 and Figure 21 As shown, the magnetic latching relay also includes a magnetic component 9, which is correspondingly arranged with the stationary contact 221 of the stationary contact unit 22. When the moving contact unit 21 and the stationary contact unit 22 are disconnected, an electric arc is generated, and the magnetic component 9 is used to extinguish the arc. There are two stationary contacts 221, and the moving contact 215 is arranged one-to-one with the stationary contact 221. Each stationary contact 221 is respectively provided with a magnetic component 9.

[0088] Optionally, the magnetic component 9 includes a metal housing 91 and a magnet 92. The magnet 92 is disposed within the metal housing 91, which is a U-shaped housing. The metal housing 91 encloses one side of the magnet 92 and its two opposite ends in the width direction. The side of the magnet 92 exposed outside the metal housing 91 faces the stationary contact single source 22, and the magnetic poles of the opposing sides of the magnets 92 in the two magnetic components 9 are opposite.

[0089] In order to fix the magnetic component 9, the base 4 has base grooves 45 on opposite sides, and the magnetic component 9 is disposed in the base grooves 45.

[0090] 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. A magnetic latching relay, characterized in that, include: An electromagnetic system (1) includes a coil unit (11) and an armature unit (12). The coil unit (11) includes a first attracting part (1131), a second attracting part (1132), a third attracting part (1141), and a fourth attracting part (1142). The armature unit (12) includes a permanent magnet (121) and a first armature (122) and a second armature (123) disposed at the two magnetic ends of the permanent magnet (121). The contact system (2) includes a moving contact unit (21) and a stationary contact unit (22). The moving contact unit (21) is connected to the armature unit (12). The coil unit (11) is energized to drive the armature unit (12) to move along a first direction, thereby disconnecting the moving contact unit (21) from the stationary contact unit (22). 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). Alternatively, the moving contact unit (21) is attracted to the stationary contact unit (22), and 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), forming a second magnetic circuit (b). The auxiliary contact unit (3) includes an auxiliary moving contact (31) and an auxiliary stationary contact (32). When the armature unit (12) moves to make the moving contact unit (21) engage with the stationary contact unit (22), the armature unit (12) makes the auxiliary moving contact (31) engage with the auxiliary stationary contact (32).

2. The magnetic latching relay according to claim 1, characterized in that, The coil unit (11) further 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 respectively 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 the third attraction part (1141) and the fourth attraction part (1142).

3. The magnetic latching relay according to claim 2, characterized in that, The first 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), 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).

4. The magnetic latching relay according to claim 3, 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).

5. The magnetic latching relay according to claim 2, characterized in that, The second 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 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).

6. The magnetic latching relay according to claim 5, 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).

7. The magnetic latching relay according to claim 1, characterized in that, The magnetic latching relay also includes a base (4) and a fixing plate (5). The electromagnetic system (1), the contact system (2) and the auxiliary contact unit (3) are all disposed in the base (4). The fixing plate (5) is disposed at the opening of the base (4) and connected to the base (4). The armature unit (12) is slidably connected to the base (4) and the fixing plate (5) in a first direction. The moving contact unit (21) is slidably connected to the base (4) and the fixing plate (5) in a first direction.

8. The magnetic latching relay according to claim 7, characterized in that, The armature unit (12) further includes a cover (124), the permanent magnet (121) is disposed inside the cover (124), 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), and the cover (124) has sliding parts (125) on the other opposite sides, one of the sliding parts (125) is slidably connected to the fixed plate (5), and the other sliding part (125) is slidably connected to the base (4).

9. The magnetic latching relay according to claim 8, characterized in that, The fixing plate (5) is provided with a first sliding hole (51), the sliding part (125) passes through the first sliding hole (51) and is connected to a shielding plate (6), the shielding plate (6) shields the gap between the first sliding hole (51) and the sliding part (125).

10. The magnetic latching relay according to claim 7, characterized in that, The fixing plate (5) includes a first plate (52), and a second plate (53) is provided on the opposite sides of the first end of the first plate (52). The second plate (53) is provided with a first snap-fit ​​part (54), and the opposite sides of the second end of the first plate (52) are provided with a second snap-fit ​​part (55). The base (4) is provided with a third snap-fit ​​part (41) that snaps into the first snap-fit ​​part (54), and a fourth snap-fit ​​part (42) that snaps into the second snap-fit ​​part (55).

11. The magnetic latching relay according to claim 7, characterized in that, The moving contact unit (21) includes a bracket (211), a conductive bridge (212), an overtravel spring (214), and a reaction spring (213). The bracket (211) is connected to the armature unit (12). The conductive bridge (212), the overtravel spring (214), and the reaction spring (213) are respectively fixed on the bracket (211). The conductive bridge (212) is used to engage with the stationary contact unit (22). The overtravel spring (214) and the reaction spring (213) are respectively fixed on the bracket (211). The two ends of the spring sheet (214) elastically press against the conductive bridge (212), and the overtravel spring sheet (214) is configured to apply a force to attract the conductive bridge (212) and the stationary contact unit (22). The two ends of the reaction spring sheet (213) elastically abut against the base (4), and the reaction spring sheet (213) is configured to apply a force to the bracket (211) to separate the conductive bridge (212) from the stationary contact unit (22).

12. The magnetic latching relay according to claim 1, characterized in that, The auxiliary moving contact (31) includes a moving spring (311), one end of which is provided with an auxiliary moving contact (312) and a trigger part (313). When the armature unit (12) moves to make the moving contact unit (21) engage with the stationary contact unit (22), the armature unit (12) presses against the trigger part (313) and makes the auxiliary moving contact (312) engage with the auxiliary stationary contact (32).

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