Magnetic latching relay

Abstract

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

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

[0003] At present, magnetic latching relays drive the relay to operate through pulse signals and rely on internal permanent magnets to maintain the current state. The electromagnetic system of magnetic latching relays is mostly a rotating structure. It is difficult for magnetic latching relays with this structure to increase the safe distance between the moving contact group and the static contact group in a limited space. For direct-acting magnetic latching relays, when the permanent magnet slides relative to the coil assembly, an air gap will be formed between the armature connected to the permanent magnet and the yoke of the coil assembly, resulting in low magnetic efficiency. A greater driving force is required to push the permanent magnet to slide, and it is also difficult to increase the safe distance between the moving contact group and the static contact group in a limited space. In addition, the magnetic latching relays in the prior art do not have auxiliary contacts, and the functions of the magnetic latching relays are single. Summary of the invention

[0004] The object of the present invention is to provide a magnetic latching relay, which has diversified functions, improves the breaking capacity of the magnetic latching relay, and increases the safety distance between the moving contact group and the static contact group in a limited space.

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

[0006] Magnetic latching relay, including:

[0007] The electromagnetic system comprises a coil unit and an armature unit, wherein the coil unit comprises a first suction portion, a second suction portion, a third suction portion and a fourth suction portion, and the armature unit comprises a permanent magnet and a first armature and a second armature arranged at two magnetic pole ends of the permanent magnet;

[0008] A contact system, comprising a moving contact unit and a stationary contact unit, wherein the moving contact unit is connected to the armature unit, and the coil unit is energized to drive the armature unit to move in a first direction, so that the moving contact unit is disconnected from the stationary contact unit, 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, or 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, the first end of the second armature is attracted to the second attraction part, and a second magnetic circuit is formed;

[0009] The auxiliary contact unit comprises an auxiliary moving contact and an auxiliary stationary contact. When the armature unit moves to make the moving contact unit and the stationary contact unit close together, the armature unit makes the auxiliary moving contact and the auxiliary stationary contact close together.

[0010] As an optional technical solution of the above-mentioned magnetic holding relay, the coil unit also includes a coil, an iron core, a first yoke assembly and a second 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 yoke assembly and the second yoke assembly, the first yoke assembly includes the first attraction part and the second attraction part, and the second yoke assembly includes the third attraction part and the fourth attraction part.

[0011] As an optional technical solution of the above-mentioned magnetic holding relay, the first magnetic yoke assembly includes a first yoke, the first end of the first yoke is connected to the first end of the iron core, the second end of the first yoke is provided with the first suction part and the second suction part, the first suction part and the second suction part are arranged between the first armature and the second armature, and the first suction part is arranged toward the first armature, and the second suction part is arranged toward the second armature.

[0012] As an optional technical solution for the above-mentioned magnetic holding relay, the second end of the first yoke is connected to a first attraction plate, the first attraction plate extends toward the second magnetic yoke assembly, the first attraction plate is placed between the first armature and the second armature, the side surface of the first attraction plate facing the first armature is the first attraction portion, and the side surface of the first attraction plate facing the second armature is the second attraction portion.

[0013] As an optional technical solution of the above-mentioned magnetic holding 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 suction part, the second end of the third yoke is provided with a fourth suction part, the third suction part and the fourth suction part are spaced apart in the first direction, and the first armature and the second armature are arranged between the third suction part and the fourth suction part.

[0014] As an optional technical solution of the above-mentioned magnetic holding relay, the second end of the second yoke is connected to a second attraction plate, the second end of the third yoke is connected to a third attraction plate, the third attraction plate and the second attraction plate both extend toward the first magnetic yoke assembly, the third attraction plate and the second attraction plate are spaced apart in the first direction, a side surface of the second attraction plate facing the third attraction plate is the third attraction portion, a side surface of the third attraction plate facing the second attraction plate is the fourth attraction portion, and the first armature and the second armature are placed between the second attraction plate and the third attraction plate.

[0015] As an optional technical solution of the above-mentioned magnetic holding relay, the magnetic holding relay also includes a base and a fixed plate, the electromagnetic system, the contact system and the auxiliary contact unit are all arranged in the base, the fixed plate is arranged at the opening of the base and connected to the base, the armature unit is respectively connected to the base and the fixed plate in a first direction, and the moving contact unit is respectively connected to the base and the fixed plate in a first direction.

[0016] As an optional technical solution of the above-mentioned magnetic holding relay, the armature unit also includes a cover shell, the permanent magnet is arranged in the cover shell, the first end of the first armature passes through the cover shell, and the first end and the second end of the first armature are placed on two opposite sides outside the cover shell, the first end of the second armature passes through the cover shell, and the first end and the second end of the second armature are placed on two opposite sides outside the cover shell, and the other two opposite sides of the cover shell are respectively provided with sliding parts, one of the sliding parts is slidably connected to the fixed plate, and the other sliding part is slidably connected to the base.

[0017] As an optional technical solution of the above-mentioned magnetic latching relay, a first sliding hole is provided on the fixed plate, the sliding part passes through the first sliding hole and is connected to a shielding plate, and the shielding plate shields the gap between the first sliding hole and the sliding part.

[0018] As an optional technical solution of the above-mentioned magnetic holding relay, the fixed plate includes a first plate, second plates are respectively provided on two opposite sides of the first end of the first plate, first clamping parts are respectively provided on the second plates, second clamping parts are respectively provided on two opposite sides of the second end of the first plate, a third clamping part clamped with the first clamping part, and a fourth clamping part clamped with the second clamping part are provided on the base.

[0019] As an optional technical solution of the above-mentioned magnetic holding relay, the moving contact unit includes a bracket, a conductive bridge, an overtravel spring and a reaction force spring, the bracket is connected to the armature unit, the conductive bridge, the overtravel spring and the reaction force spring are respectively fixed on the bracket, the conductive bridge is used to be attracted with the static contact unit, the two ends of the overtravel spring are elastically pressed on the conductive bridge, the overtravel spring is configured to apply a force to attract the conductive bridge and the static contact unit, the two ends of the reaction force spring are elastically abutted in the base, and the reaction force spring is configured to apply a force to the bracket to disconnect the conductive bridge and the static contact unit.

[0020] As an optional technical solution of the above-mentioned magnetic holding relay, the auxiliary moving contact includes a moving spring, one end of which is provided with an auxiliary moving contact and a trigger part. When the armature unit moves to make the moving contact unit and the static contact unit attract each other, the armature unit presses against the trigger part and makes the auxiliary moving contact and the auxiliary static contact attract each other.

[0021] Beneficial effects of the present invention:

[0022] The magnetic latching relay provided by the present invention has the following characteristics: when the moving contact unit and the stationary contact unit are disconnected, the first end of the first armature is attracted to the first attraction part, the first 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 moving contact unit and the stationary contact unit are attracted, the second end of the first armature is attracted to the third attraction part, the second 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; in the first magnetic circuit and the second magnetic circuit, there is no air gap between the attraction part and the armature, which improves the magnetic attraction efficiency and thus can improve the breaking capacity of the magnetic latching relay; the structure of the armature and the attraction part being attracted is relatively compact, which reduces the occupied space, and the electromagnetic system is a direct-acting electromagnetic system, which can increase the safety 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, which simplifies the structure, and the addition of the auxiliary contact unit makes the magnetic latching relay function diversified, thereby improving the flexibility of using the magnetic latching relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is an exploded view of a magnetic latching relay provided in an embodiment of the present invention;

[0024] Figure 2 is a schematic diagram of the overall structure of an electromagnetic system provided by an embodiment of the present invention;

[0025] Figure 3 is a state diagram of the electromagnetic system when the magnetic latching relay provided by the embodiment of the present invention is in the disconnected state;

[0026] Figure 4 is a state diagram of the electromagnetic system when the magnetic latching relay provided by the embodiment of the present invention is in a closed state;

[0027] Figure 5 is a schematic diagram of the overall structure of a coil unit provided in an embodiment of the present invention;

[0028] Figure 6 is an exploded diagram of a coil unit provided by an embodiment of the present invention;

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

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

[0031] Fig. 9 is a schematic structural diagram of an electromagnetic system provided by another embodiment of the present invention;

[0032] Fig.10 is a schematic structural diagram of an electromagnetic system provided by another embodiment of the present invention;

[0033] Fig.11 is an isometric view of the internal structure of a magnetic latching relay provided by an embodiment of the present invention;

[0034] Fig.12 is a front view of the internal structure of a magnetic latching relay provided by an embodiment of the present invention;

[0035] Fig.13 is a schematic diagram of the internal structure of a base provided by an embodiment of the present invention;

[0036] Fig.14 is a schematic structural diagram of a fixing plate provided in an embodiment of the present invention;

[0037] Fig.15 is a schematic structural diagram of an armature unit provided in an embodiment of the present invention;

[0038] Fig.16 is a schematic diagram of the matching structure of the sliding part and the housing provided by an embodiment of the present invention;

[0039] Fig.17 is an isometric view of a moving contact unit provided in an embodiment of the present invention;

[0040] Fig.18 is a front view of a moving contact unit provided by an embodiment of the present invention;

[0041] Fig.19 is an exploded view of a moving contact unit provided in an embodiment of the present invention;

[0042] Fig. 20It is a structural schematic diagram of an auxiliary contact unit provided by an embodiment of the present invention being placed in a base;

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

[0044] Fig. 22 It is a structural schematic diagram of an auxiliary contact unit provided in an embodiment of the present invention.

[0045] In the figure:

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

[0047] 11. Coil unit; 111. Coil; 1111. Third lead-out terminal; 1112. Fourth lead-out terminal; 112. Iron core; 113. First magnetic yoke assembly; 1131. First suction part; 1132. Second suction part; 1133. First yoke; 1134. First suction plate; 1135. Fourth yoke; 1136. Fourth suction plate; 114. Second magnetic yoke assembly; 1141. Third suction part; 1142. Fourth suction part ; 1143, second yoke; 1144, third yoke; 1145, second suction plate; 1146, third suction plate; 115, coil sleeve; 116, first mounting seat; 1161, first accommodating groove; 117, second mounting seat; 1171, second accommodating groove; 12, armature unit; 121, permanent magnet; 122, first armature; 123, second armature; 124, cover; 125, sliding portion; 126, connecting portion;

[0048] 21. Moving contact unit; 211. Bracket; 2111. Upper bracket; 2112. Lower bracket; 2113. Slider; 2114. Clamping block; 2115. Clamping hole; 2116. First positioning column; 2117. Second positioning column; 2118. Raised edge; 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 terminal; 32. Auxiliary static contact; 321. Static contact plate; 322. Auxiliary static contact; 323. Second lead-out terminal;

[0050] 41. third clamping portion; 42. fourth clamping portion; 43. third sliding hole; 44. fourth sliding hole; 45. base groove;

[0051] 51. first sliding hole; 52. first plate; 53. second plate; 54. first clamping portion; 55. second clamping portion; 56. fifth sliding hole; 57. rib;

[0052] 71. Second sliding hole;

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

[0054] a. First magnetic circuit; b. Second magnetic circuit. DETAILED DESCRIPTION

[0055] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0056] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0058] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0059] like Figures 1 to 4As 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 suction part 1131, a second suction part 1132, a third suction part 1141 and a fourth suction part 1142, and the armature unit 12 includes a permanent magnet 121 and a first armature 122 and a second armature 123 arranged at two magnetic poles 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 in a first direction, so that the moving contact unit 21 is disconnected from the stationary contact unit 22, the first end of the first armature 122 is attracted to the first attraction part 1131, the second end of the second armature 123 is attracted to the fourth attraction part 1142, and a first magnetic circuit a is formed, or 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, the first end of the second armature 123 is attracted to the second attraction part 1132, and a second magnetic circuit b is formed. The auxiliary contact unit 3 includes an auxiliary moving contact 31 and an auxiliary stationary contact 32 . When the armature unit 12 moves to attract the moving contact unit 21 and the stationary contact unit 22 , the armature unit 12 attracts the auxiliary moving contact 31 and the auxiliary stationary contact 32 .

[0060] When the moving contact unit 21 and the stationary contact unit 22 are disconnected, the first end of the first armature 122 is attracted to the first attraction part 1131, and the first end of the second armature 123 is attracted to the fourth attraction part 1142, and a first magnetic circuit a is formed, so that the magnetic holding relay is in an open state; when the moving contact unit 21 and the stationary contact unit 22 are attracted, the second end of the first armature 122 is attracted to the third attraction part 1141, and the second end of the second armature 123 is attracted to the second attraction part 1132, and a second magnetic circuit b is formed, so that the magnetic holding relay is in a closed state; In the 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 can improve the breaking capacity of the magnetic holding relay; the structure of the armature and the attraction part is relatively compact, which reduces the occupied space, and the electromagnetic system 1 is a direct-acting electromagnetic system, which can increase the safety distance between the moving contact unit 21 and the static contact unit 22 in a limited space; the auxiliary contact unit 3 is linked with the moving contact unit 21, which simplifies the structure, and the addition of the auxiliary contact unit 3 makes the magnetic holding relay diversified in function and improves the flexibility of the use of the magnetic holding relay.

[0061] The coil unit 11 also includes a coil 111, an iron core 112, a first yoke assembly 113, and a second yoke assembly 114. The coil 111 is sleeved on the outside of the iron core 112. The two ends of the iron core 112 are respectively connected to the first yoke assembly 113 and the second yoke assembly 114. The first yoke assembly 113 includes a first suction portion 1131 and a second suction portion 1132. The second yoke assembly 114 includes a third suction portion 1141 and a fourth suction portion 1142. The coil 111 is connected to a power supply. When a first pulse signal is applied to the coil 111, the first end of the first armature 122 is suctioned with the first suction portion 1131, and the second end of the second armature 123 is suctioned with the fourth suction portion 1142, forming a first magnetic circuit a, and the magnetic holding circuit is in a disconnected state. When the second pulse signal is applied to the coil 111, the second end of the first armature 122 is attracted to the third 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, 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 6 As shown, the coil unit 11 also includes a coil sleeve 115, the coil 111 is wound on the coil sleeve 115, and a first mounting seat 116 and a second mounting seat 117 are provided at both ends of the coil sleeve 115. The iron core 112 is placed in the coil sleeve 115, and the first mounting seat 116 and the second mounting seat 117 are passed through both ends of the iron core 112. The first mounting seat 116 is provided with a first accommodating groove 1161, the first end of the first yoke assembly 113 is placed in the first accommodating groove 1161 and is connected to the iron core 112, the second mounting seat 117 is provided with a second accommodating groove 1171, and the first end of the second yoke assembly 114 is placed in the second accommodating groove 1171 and is connected to the iron core 112. The coil sleeve 115 provides effective support for the coil 111 and also serves to fix the iron core 112. In addition, the first mounting seat 116 and the second mounting seat 117 serve to fix the first yoke assembly 113 and the second yoke assembly 114, so that the coil 111, the iron core 112, the first yoke assembly 113 and the second yoke assembly 114 form a stable connection structure.

[0063] In some embodiments, continue to refer to Figure 3 and Figure 4As shown, the first magnetic 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, the first end of the first yoke 1133 is placed in the first accommodating groove 1161, and the second end of the first yoke 1133 is provided with a first suction portion 1131 and a second suction portion 1132, the first suction portion 1131 and the second suction portion 1132 are arranged between the first armature 122 and the second armature 123, and the first suction portion 1131 is arranged toward the first armature 122, and the second suction portion 1132 is arranged toward the second armature 123. The structure is simple, and sufficient space is provided for the movement of the first armature 122 and the second armature 123, thereby increasing the safety distance between the moving contact unit and the static contact unit in a limited space. The permanent magnet 121 moves along the first direction to achieve the first armature 122 and the first suction part 1131 to be attracted, and the second armature 123 and the second suction part 1132 to be separated, or the second armature 123 and the second suction part 1132 to be attracted, and the first armature 122 and the first suction part 1131 to be separated.

[0064] Further optionally, the second end of the first yoke 1133 is connected to a first suction plate 1134, the first suction plate 1134 extends toward the second magnetic yoke assembly 114, the first suction plate 1134 is disposed between the first armature 122 and the second armature 123, the side surface of the first suction plate 1134 facing the first armature 122 is the first suction portion 1131, and the side surface of the first suction plate 1134 facing the second armature 123 is the second suction portion 1132. The first suction plate 1134 and the first yoke 1133 are an integrally formed structure, the first yoke 1133 extends along the first direction, and the first suction plate 1134 and the first yoke 1133 are arranged at an angle. The first armature 122 and the first suction part 1131 as well as the second armature 123 and the second suction part 1132 are in surface contact with a large contact area, thereby increasing the magnetic attraction force between the first armature 122 or the second armature 123 and the first yoke assembly 113, so that the magnetic holding relay can be stably maintained in the closed state or the open state.

[0065] In some embodiments, the second magnetic yoke assembly 114 further includes a second yoke 1143 and a third yoke 1144, the first end of the second yoke 1143 and the first end of the third yoke 1144 are respectively connected to the second end of the core 112, and the first end of the second yoke 1143 and the first end of the third yoke 1144 are both placed in the second accommodating groove 1171. The second end of the second yoke 1143 is provided with a third suction portion 1141, and the second end of the third yoke 1144 is provided with a fourth suction portion 1142, the third suction portion 1141 and the fourth suction portion 1142 are spaced apart in the first direction, and the first armature 122 and the second armature 123 are arranged between the third suction portion 1141 and the fourth suction portion 1142. When the permanent magnet 121 moves in the first direction, the first armature 122 can be attracted to the third attraction portion 1141, while the second armature 123 is separated from the fourth attraction portion 1142, or the second armature 123 is attracted to the fourth attraction portion 1142, while the first armature 122 is separated from the third attraction portion 1141. The distance between the third attraction portion 1141 and the fourth attraction portion 1142 limits 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, the second end of the third yoke 1144 is connected to a third suction plate 1146, the third suction plate 1146 and the second suction plate 1145 both extend toward the first magnetic yoke assembly 113, the third suction plate 1146 and the second suction plate 1145 are spaced apart in the first direction, the side surface of the second suction plate 1145 facing the third suction plate 1146 is the third suction portion 1141, the side surface of the third suction plate 1146 facing the second suction plate 1145 is the fourth suction portion 1142, and the first armature 122 and the second armature 123 are disposed between the second suction plate 1145 and the third suction plate 1146. The second suction plate 1145 and the second yoke 1143 are an integrally formed structure, the second yoke 1143 extends along the first direction, and the second suction plate 1145 and the second yoke 1143 are disposed at an angle. The third suction plate 1146 and the third yoke 1144 are integrally formed, the third yoke 1144 extends along the first direction, and the third suction plate 1146 and the third yoke 1144 are arranged at an angle. The first armature 122 and the third suction portion 1141, as well as the second armature 123 and the fourth suction portion 1142 are in surface contact, with a large contact area, which increases the magnetic attraction between the first armature 122 or the second armature 123 and the second magnetic yoke assembly 114, so that the magnetic latching relay can be stably maintained in the closed state or the open state.

[0067] In some other embodiments, such as Figure 7As shown, the second magnetic yoke assembly 114 includes a second yoke 1143, the second yoke 1143 is bent into a U-shaped structure, and the first end and the second end of the second yoke 1143 are spaced apart in the first direction, the bent and overlapping parts of the second yoke 1143 fit together and are both connected to the iron core 112, the first end of the second yoke 1143 is provided with a second suction plate 1145, the second end of the second yoke 1143 is provided with a third suction plate 1146, the third suction plate 1146 and the second suction plate 1145 are spaced apart in the first direction, the side surface of the second suction plate 1145 facing the third suction plate 1146 is the third suction portion 1141, the side surface of the third suction plate 1146 facing the second suction plate 1145 is the fourth suction portion 1142, and the first armature 122 and the second armature 123 are placed between the second suction plate 1145 and the third suction plate 1146. This solution reduces the number of yokes set and simplifies the structure of the second magnetic yoke assembly 114. Optionally, the second attraction plate 1145 and the third attraction plate 1146 are integrally formed with the second yoke 1143 , that is, two ends of the second yoke 1143 are bent to form the second attraction plate 1145 and the third attraction plate 1146 .

[0068] In some other embodiments, such as Figure 8 As shown, the second magnetic yoke assembly 114 includes a second yoke 1143, a first end of the second yoke 1143 is connected to the second end of the iron core 112, and the second end of the second yoke 1143 is provided with a second suction plate 1145, the side of the second suction plate 1145 facing the iron core 112 is the third suction portion 1141, and the side of the second suction plate 1145 away from the iron core 112 is the fourth suction portion 1142, the second end of the first armature 122 and the second end of the second armature 123 are arranged in an X shape, the second end of the first armature 122 is placed between the iron core 112 and the third suction portion 1141, and the second suction plate 1145 is placed between the second end of the first armature 122 and the second end of the second armature 123.

[0069] In some other embodiments, such as Fig. 9As shown, the first magnetic yoke assembly 113 and the second magnetic yoke assembly 114 have the same structure. The first magnetic yoke assembly 113 includes a first yoke 1133 and a fourth yoke 1135. The first end of the first yoke 1133 and the first end of the fourth yoke 1135 are respectively connected to the first end of the iron core 112. The second end of the first yoke 1133 is provided with a first suction plate 1134, and the second end of the second yoke 1143 is provided with a fourth suction plate 1136. The first suction plate 1134 and the fourth suction plate 1135 are respectively connected to the first end of the iron core 112. The closing plates 1136 are spaced apart in the first direction, the side of the first suction plate 1134 away from the fourth suction plate 1136 is the first suction portion 1131, the side of the fourth suction plate 1136 away from the first suction plate 1134 is the second suction portion 1132, the first end of the first armature 122 is placed on the side of the first suction plate 1134 away from the fourth suction plate 1136, and the first end of the second armature 123 is placed on the side of the fourth suction plate 1136 away from the first suction plate 1134. The second magnetic yoke assembly 114 includes a second yoke 1143 and a third yoke 1144, the first end of the second yoke 1143 and the first end of the third yoke 1144 are respectively connected to the second end of the iron core 112, the second end of the second yoke 1143 is provided with a second suction plate 1145, the second end of the third yoke 1144 is provided with a third suction plate 1146, the second suction plate 1145 and the third suction plate 1146 are spaced apart in the first direction, the side of the second suction plate 1145 facing the third suction plate 1146 is the third suction portion 1141, the side of the third suction plate 1146 facing the second suction plate 1145 is the fourth suction portion 1142, the first armature 122 and the second armature 123 are placed between the second suction plate 1145 and the third suction plate 1146.

[0070] In some other embodiments, such as Fig.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 the first direction, the side of the first suction plate 1134 away from the fourth suction plate 1136 is the first suction portion 1131, the side of the fourth suction plate 1136 away from the first suction plate 1134 is the second suction portion 1132, the first end of the first armature 122 is placed on the side of the first suction plate 1134 away from the fourth suction plate 1136, and the first end of the second armature 123 is placed on the side of the fourth suction plate 1136 away from the first suction plate 1134. The second magnetic yoke assembly 114 includes a second yoke 1143, a first end of the second yoke 1143 is connected to the second end of the iron core 112, and the second end of the second yoke 1143 is provided with a second attraction plate 1145 and a third attraction plate 1146, the second attraction plate 1145 and the third attraction plate 1146 are spaced apart in the first direction, the side of the second attraction plate 1145 facing the third attraction plate 1146 is the third attraction portion 1141, the side of the third attraction plate 1146 facing the second attraction plate 1145 is the fourth attraction portion 1142, and the first armature 122 and the second armature 123 are placed between the second attraction plate 1145 and the third attraction plate 1146.

[0071] In some embodiments, in combination Figures 11 to 13 As shown, the magnetic latching relay further includes a base 4 and a fixed plate 5, the electromagnetic system 1, the contact system 2 and the auxiliary contact unit 3 are all arranged in the base 4, the fixed plate 5 is arranged at the opening of the base 4 and connected to the base 4, the armature unit 12 is respectively connected to the base 4 and the fixed plate 5 in a sliding manner along the first direction, and the moving contact unit 21 is respectively connected to the base 4 and the fixed plate 5 in a sliding manner along the first direction. The base 4 and the fixed plate 5 play a role in positioning the moving contact unit 21 and the armature unit 12, and provide a guide 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 connected to the base 4 in a sliding manner, and then the fixed plate 5 is fixed to the base 4, and the armature unit 12 and the moving contact unit 21 are connected to the fixed plate 5 in a sliding manner.

[0072] Alternatively, if Fig.13 and Fig.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, and first clamping portions 54 are respectively provided on the second plates 53, and second clamping portions 55 are respectively provided on opposite sides of the second end of the first plate 52, and the base 4 is provided with a third clamping portion 41 clamped with the first clamping portion 54, and a fourth clamping portion 42 clamped with the second clamping portion 55. Compared with the prior art, the fixing plate 5 provided in this embodiment only covers a part of the opening of the base 4, which saves materials while ensuring that the moving contact unit 21 and the armature unit 12 can stably slide in the base 4.

[0073] Further optionally, the first clamping portion 54 and the second clamping portion 55 are both grooves, and the third clamping portion 41 and the fourth clamping portion 42 are both protrusions, which are inserted into the grooves to fix the fixing plate 5 on the base 4.

[0074] See also Figures 12 to 15 As shown, the armature unit 12 also includes a cover shell 124, and the permanent magnet 121 is arranged in the cover shell 124 to protect the permanent magnet 121 from damage. The first end of the first armature 122 passes through the cover shell 124, and the first end and the second end of the first armature 122 are placed on two opposite sides outside the cover shell 124. The first end of the second armature 123 passes through the cover shell 124, and the first end and the second end of the second armature 123 are placed on two opposite sides outside the cover shell 124, so that the armature and the suction part can be sucked together. The cover shell 124 is provided with 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, so as to realize the sliding connection between the armature unit 12 and the base 4 and the fixed plate 5.

[0075] Optionally, a first sliding hole 51 is provided on the fixed plate 5, 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, thereby improving the pollution protection performance of the magnetic holding relay, and also improving the stability of the sliding connection between the sliding part 125 and the fixed plate 5, thereby preventing the sliding part 125 from detaching from the fixed plate 5.

[0076] Two ribs 57 are provided on one side of the fixed plate 5 where the shielding plate 6 is provided. 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 . 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 slidably connected to the fixing plate 5 is provided with a marking line or a linear indicating groove, the outer cover of the base 4 and the fixing plate 5 is provided with a shell 7, and the shell 7 is provided with a second sliding hole 71, and the second sliding hole 71 extends in the same direction as the first sliding hole 51, and the shell 7 is provided with indicating marks such as "ON" showing the main circuit connection state and "OFF" showing the main circuit disconnection state, and the end of the sliding part 125 is arranged corresponding to the second sliding hole 71, and the sliding part 125 can be observed through the second sliding hole 71. When the main circuit is in the on state, the marking line or indicating groove of the sliding part 125 corresponds to "ON", and when the main circuit is in the disconnected state, the marking line or indicating groove of the sliding part 125 corresponds to "OFF", which is convenient for the staff to obtain the working state of the main circuit.

[0078] Continue to see Fig.13 As shown, another sliding portion 125 on the cover shell 124 is slidably connected to the base 4. Optionally, a third sliding hole 43 is provided at the bottom of the base 4, and the sliding portion 125 is slidably disposed in the third sliding hole 43.

[0079] In some embodiments, Figures 17 to 19 As shown, the movable contact unit 21 includes a bracket 211, a conductive bridge 212, an overtravel spring piece 214 and a reaction spring piece 213. The bracket 211 is connected to the armature unit 12. The conductive bridge 212, the overtravel spring piece 214 and the reaction spring piece 213 are fixed on the bracket 211 respectively. The conductive bridge 212 is used to attract the static contact unit 22. The two ends of the overtravel spring piece 214 are elastically pressed on the conductive bridge 212. The overtravel spring piece 214 is configured to apply a force to attract the conductive bridge 212 and the static contact unit 22, thereby improving the ability of the conductive bridge 212 and the static contact unit 22 to attract. The two ends of the reaction spring piece 213 are elastically abutted in the base 4. The reaction spring piece 213 is configured to apply a force to the bracket 211 to disconnect the conductive bridge 212 and the static contact unit 22, thereby improving the disconnection ability of the movable contact unit 21 and the static contact unit 22 of the magnetic latching relay.

[0080] Optionally, the bracket 211 includes an upper bracket 2111 and a lower bracket 2112, and two opposite sides of the lower bracket 2112 are respectively provided with sliders 2113, one of the sliders 2113 is used to Fig.13 The base 4 shown is slidably connected, and another slider 2113 is used to connect with Fig.14The fixing plate 5 shown is connected. Specifically, a fourth sliding hole 44 is provided on the base 4, and one of the sliders 2113 is slidably connected to the fourth sliding hole 44, and a fifth sliding hole 56 is provided on the fixing plate 5, and the slider 2113 is slidably connected to the fifth sliding hole 56. A clamping block 2114 is also provided on one side of the lower bracket 2112 where the slider 2113 is provided, and the clamping block 2114 and the slider 2113 are arranged at intervals, and the lower bracket 2112 between the clamping block 2114 and the slider 2113 is recessed with a plug-in slot, and the reaction spring 213 passes through the gap between the clamping block 2114 and the slider 2113 and is plugged into the plug-in slot, and both plug-in slots are provided with a reaction spring 213. When the magnetic latching relay is opened, the two ends of the reaction spring 213 are pressed against the base 4. The upper bracket 2111 is in a U-shaped structure, and the two side walls of the upper bracket 2111 are respectively provided with snap-in holes 2115, and the snap-in blocks 2114 can be snapped into the snap-in holes 2115, thereby realizing the connection between the upper bracket 2111 and the lower bracket 2112, and fixing the reaction spring sheet 213 in the plug-in slot.

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

[0082] Combination Fig.15 and Fig.19 As shown, the end of the lower bracket 2112 that is away from the upper bracket 2111 is connected to the armature unit 12. Specifically, a connecting portion 126 is further provided on the cover 124. The connecting portion 126 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 is attracted or separated from the static contact unit 22. The connecting portion 126 includes a U-shaped member, and the two opposite side walls on the inner side of the U-shaped member are respectively provided with sliding grooves. The opposite sides of the end of the lower bracket 2112 are provided with convex ridges 2118, and the convex ridges 2118 are inserted into the corresponding sliding grooves to fix the moving contact unit 21 on the cover 124. The structure is simple and easy to assemble.

[0083] The two ends of the conductive bridge 212 are provided with moving contacts 215. The stationary contact unit 22 includes stationary contacts 221. The moving contact 215 is attracted or separated with the corresponding stationary contact 221. The structure of the stationary contact unit 22 is prior art and will not be described in detail here.

[0084] In some embodiments, Figure 20 to Figure 22 As shown, the auxiliary moving contact 31 includes a moving spring piece 311, and one end of the moving spring piece 311 is provided with an auxiliary moving contact 312 and a trigger portion 313. When the armature unit 12 moves to make the moving contact unit 21 and the stationary contact unit 22 close, the armature unit 12 presses the trigger portion 313 and makes the auxiliary moving contact 312 close with the auxiliary stationary contact 32. Specifically, the first armature 122 presses the trigger portion 313 to make the auxiliary moving contact 312 close with the auxiliary stationary contact 32. When the armature unit 12 moves to disconnect the moving contact unit 21 and the stationary contact unit 22, the first armature 122 separates from the trigger portion 313, the moving spring piece 311 is reset by its own elastic force, and the auxiliary moving contact 312 is disconnected from the auxiliary stationary contact 32. Optionally, the trigger part 313 includes a trigger plate, one end of which is connected to one end of the moving spring piece 311, and the trigger plate and the auxiliary moving contact 312 are connected to the moving spring piece 311 at one point. The force applied by the first armature 122 to the moving spring piece 311 is closer to the auxiliary moving contact 312, ensuring that the auxiliary moving contact 312 and the auxiliary static contact 32 can be stably attracted.

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

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

[0087] Reference Fig.13 and Fig.21 As shown, the magnetic latching relay further includes a magnetic component 9, which is arranged corresponding to the static contact 221 of the static contact unit 22. When the moving contact unit 21 and the static contact unit 22 are disconnected, an arc is generated, and the magnetic component 9 is used to extinguish the arc. There are two static contacts 221, and the moving contact 215 is arranged in a one-to-one correspondence with the static contact 221, and each static contact 221 is respectively provided with a magnetic component 9.

[0088] Optionally, the magnetic assembly 9 includes a metal shell 91 and a magnet 92. The magnet 92 is disposed in the metal shell 91. The metal shell 91 is a U-shaped shell. The metal shell 91 wraps one side of the magnet 92 and two opposite ends of the magnet 92 in the width direction. The side of the magnet 92 exposed from the metal shell 91 is disposed toward the static contact single source 22, and the magnetic poles of the facing sides of the magnets 92 of the two magnetic assemblies 9 are opposite.

[0089] In order to fix the magnetic component 9 , two opposite sides of the base 4 are respectively provided with base grooves 45 , and the magnetic component 9 is disposed in the base grooves 45 .

[0090] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A magnetic latching relay, characterized in that: include: An electromagnetic system (1) comprises a coil unit (11) and an armature unit (12), wherein the coil unit (11) comprises a first suction portion (1131), a second suction portion (1132), a third suction portion (1141) and a fourth suction portion (1142), and the armature unit (12) comprises a permanent magnet (121) and a first armature (122) and a second armature (123) arranged at two magnetic pole ends of the permanent magnet (121); A contact system (2), comprising a moving contact unit (21) and a stationary contact unit (22), wherein 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, so that the moving contact unit (21) is disconnected from the stationary contact unit (22), the first end of the first armature (122) is attracted to the first attraction portion (1131), the second end of the second armature (123) is attracted to the fourth attraction portion (1142), and a first magnetic circuit (a) is formed; or 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 portion (1141), the first end of the second armature (123) is attracted to the second attraction portion (1132), and a second magnetic circuit (b) is formed; The auxiliary contact unit (3) comprises 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) close together, the armature unit (12) makes the auxiliary moving contact (31) and the auxiliary stationary contact (32) close together.

2. The magnetic latching relay according to claim 1, characterized in that: The coil unit (11) further comprises 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); 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) comprises the first suction portion (1131) and the second suction portion (1132); the second magnetic yoke assembly (114) comprises the third suction portion (1141) and the fourth suction portion (1142).

3. The magnetic latching relay according to claim 2, characterized in that: The first magnetic yoke assembly (113) comprises a first yoke (1133), wherein a first end of the first yoke (1133) is connected to a first end of the iron core (112), and a second end of the first yoke (1133) is provided with a first suction portion (1131) and a second suction portion (1132), wherein the first suction portion (1131) and the second suction portion (1132) are arranged between the first armature (122) and the second armature (123), and the first suction portion (1131) is arranged toward the first armature (122), and the second suction portion (1132) is arranged toward the second armature (123).

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 attraction plate (1134), the first attraction plate (1134) extends toward the second magnetic yoke assembly (114), the first attraction plate (1134) is disposed between the first armature (122) and the second armature (123), a side surface of the first attraction plate (1134) facing the first armature (122) is the first attraction portion (1131), and a side surface of the first attraction plate (1134) facing the second armature (123) is the second attraction portion (1132).

5. The magnetic latching relay according to claim 2, characterized in that: The second magnetic yoke assembly (114) comprises a second yoke (1143) and a third yoke (1144); the first end of the second yoke (1143) and the first end of the third yoke (1144) are respectively connected to the second end of the iron core (112); the second end of the second yoke (1143) is provided with a third suction portion (1141); the second end of the third yoke (1144) is provided with a fourth suction portion (1142); the third suction portion (1141) and the fourth suction portion (1142) are arranged at intervals in a first direction; the first armature (122) and the second armature (123) are arranged between the third suction portion (1141) and the fourth suction portion (1142).

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

7. The magnetic latching relay according to claim 1, characterized in that: The magnetic holding relay further comprises a base (4) and a fixed plate (5); the electromagnetic system (1), the contact system (2) and the auxiliary contact unit (3) are all arranged in the base (4); the fixed plate (5) is arranged at an opening of the base (4) and is connected to the base (4); the armature unit (12) is respectively connected to the base (4) and the fixed plate (5) in a sliding manner along a first direction; and the moving contact unit (21) is respectively connected to the base (4) and the fixed plate (5) in a sliding manner along the first direction.

8. The magnetic latching relay according to claim 7, characterized in that: The armature unit (12) also includes a cover shell (124), the permanent magnet (121) is arranged in the cover shell (124), the first end of the first armature (122) passes through the cover shell (124), and the first end and the second end of the first armature (122) are placed on two opposite sides outside the cover shell (124), the first end of the second armature (123) passes through the cover shell (124), and the first end and the second end of the second armature (123) are placed on two opposite sides outside the cover shell (124), and the cover shell (124) is provided with sliding parts (125) on two 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 portion (125) passes through the first sliding hole (51) and is connected to a shielding plate (6), and the shielding plate (6) shields a gap between the first sliding hole (51) and the sliding portion (125).

10. The magnetic latching relay according to claim 7, characterized in that: The fixing plate (5) comprises a first plate (52), second plates (53) are respectively provided on two opposite sides of a first end of the first plate (52), first clamping portions (54) are respectively provided on the second plates (53), second clamping portions (55) are respectively provided on two opposite sides of a second end of the first plate (52), and the base (4) is provided with a third clamping portion (41) clamped with the first clamping portion (54), and a fourth clamping portion (42) clamped with the second clamping portion (55).

11. The magnetic latching relay according to claim 7, characterized in that: The movable contact unit (21) comprises a bracket (211), a conductive bridge (212), an overtravel spring sheet (214) and a reaction spring sheet (213); the bracket (211) is connected to the armature unit (12); the conductive bridge (212), the overtravel spring sheet (214) and the reaction spring sheet (213) are respectively fixed to the bracket (211); the conductive bridge (212) is used to attract the stationary contact unit (22); ... The two ends of the spring sheet (214) are elastically pressed against the conductive bridge (212), and the overtravel spring sheet (214) is configured to apply a force that causes the conductive bridge (212) and the stationary contact unit (22) to be attracted. The two ends of the reaction force spring sheet (213) are elastically abutted against the inside of the base (4), and the reaction force spring sheet (213) is configured to apply a force to the bracket (211) that causes the conductive bridge (212) and the stationary contact unit (22) to be disconnected.

12. The magnetic latching relay according to claim 1, characterized in that: The auxiliary moving contact (31) comprises a moving spring (311), one end of which is provided with an auxiliary moving contact (312) and a trigger portion (313); when the armature unit (12) moves to cause the moving contact unit (21) and the stationary contact unit (22) to be attracted, the armature unit (12) presses against the trigger portion (313) and causes the auxiliary moving contact (312) and the auxiliary stationary contact (32) to be attracted.

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