Two-phase symmetrical magnetic latching relay

Abstract

The utility model discloses a two-phase symmetrical magnetic latching relay, which comprises a shell, a magnetic driving mechanism, a first relay mechanism and a second relay mechanism, and is characterized in that the first relay mechanism comprises a first positive pole piece and a first negative pole piece, and the second relay mechanism comprises a second positive pole piece and a second negative pole piece; the first positive pole piece, the second positive pole piece, the second negative pole piece and the first negative pole piece are sequentially arranged, one ends of the first positive pole piece, the second positive pole piece, the second negative pole piece and the first negative pole piece are inserted into the shell, and a first contact switch for connecting and disconnecting electric connection is arranged between the first positive pole piece and the first negative pole piece in the shell; a second contact switch used for connecting and disconnecting electric connection is arranged between the second positive pole piece and the second negative pole piece in the shell, the magnetic driving mechanism is located in the shell to drive the first contact switch and the second contact switch to be synchronously connected or disconnected, and the risk of short circuit caused by cross insulation damage of the first relay mechanism and the second relay mechanism is reduced. And the operation stability and reliability of the whole system are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of magnetic latching relays, in particular to a two-phase symmetrical magnetic latching relay. BACKGROUND

[0002] The core working mechanism of the magnetic latching relay is based on the principle of electromagnetic induction. When the coil is energized, a magnetic field is generated, which interacts with the internal magnet, causing the armature to move, thereby closing or opening the contacts. However, in some occasions requiring dual control, two-phase magnetic latching relays are often used to control two circuits, which can simultaneously control two different circuits to achieve the on-off of power or signals.

[0003] As disclosed in the two-phase magnetic latching relay with authorization number CN2018206931539U, the two-phase magnetic latching relay includes a shell and an end cover matched with the open shell, a coil assembly and an armature assembly are arranged in the shell, two groups of reed assemblies are arranged on both sides of the coil assembly and the armature assembly, and a push block capable of pushing the reed assembly is connected to the armature assembly. When external voltage acts on the coil assembly, the magnetic force on the coil drives the armature assembly to deflect, and the deflection of the armature assembly drives the push block to move, thereby causing the moving contact and the stationary contact in the reed assembly to contact or separate, to complete the simultaneous conduction and disconnection of the two-phase circuit.

[0004] The reed assembly is usually used as a contact element to turn on or off the circuit under the action of electromagnetic force, but when the insulation coating on the reed assembly is damaged during actual use of the two-phase magnetic latching relay, the conductive parts originally isolated between the two groups of reed assemblies will come into contact with each other, and the two groups of reed assemblies will be connected to different circuits or power sources, forming a short circuit between the two groups of reed assemblies, causing the current to bypass the predetermined circuit path and flow directly from high potential to low potential, thereby causing a series of safety problems and reducing the operational stability and reliability of the entire system. Practical new type content

[0005] In order to reduce the risk of short circuit caused by cross-insulation damage of the two groups of reed assemblies, a two-phase symmetrical magnetic latching relay is provided.

[0006] The above application purpose of the present application is realized by the following technical scheme:

[0007] The application discloses a two-phase symmetrical magnetic latching relay which comprises a shell, a magnetic driving mechanism, a first relay mechanism and a second relay mechanism, wherein the first relay mechanism comprises a first positive electrode and a first negative electrode, the second relay mechanism comprises a second positive electrode and a second negative electrode, the first positive electrode, the second positive electrode, the second negative electrode and the first negative electrode are sequentially arranged, and one end of each of the electrodes is inserted into the shell; the end of the first positive electrode inserted into the shell is a first positive switching end, the end of the first negative electrode inserted into the shell is a first negative switching end, and a first contact switch for connecting or disconnecting electric connection is arranged between the first positive switching end and the first negative switching end; the end of the second positive electrode inserted into the shell is a second positive switching end, the end of the second negative electrode inserted into the shell is a second negative switching end, and a second contact switch for connecting or disconnecting electric connection is arranged between the second positive switching end and the second negative switching end; and the magnetic driving mechanism is arranged in the shell and drives the first contact switch and the second contact switch to synchronously connect or synchronously disconnect.

[0008] By adopting the technical scheme, the first positive electrode, the second positive electrode, the second negative electrode and the first negative electrode are sequentially arranged, the first positive electrode and the first negative electrode are connected through the second contact switch, the control of a first circuit is realized, the second positive electrode and the second negative electrode are connected through the second contact switch, the control of a second circuit is realized, the first positive electrode in the first circuit is adjacent to the second positive electrode in the second circuit, and the second negative electrode in the second circuit is adjacent to the first negative electrode in the first circuit, so that the same electrodes are arranged between the first relay mechanism and the second relay mechanism, even if the insulation coating on the first relay mechanism or the second relay mechanism is damaged, the first relay mechanism and the second relay mechanism cannot be electrically connected, the risk of short circuit caused by the cross insulation damage of the first relay mechanism and the second relay mechanism is reduced, and the operation stability and reliability of the whole system are improved.

[0009] Optionally, the first relay mechanism further comprises a conductive piece, one end of the conductive piece is fixedly connected with the first positive switching end, and the other end of the conductive piece is provided with the first contact switch for connecting or disconnecting electric connection between the first positive switching end and the first negative switching end.

[0010] By adopting the above scheme, the conductive piece is additionally arranged between the first positive switching end and the first contact switch support, on one hand, the electric connection between the first positive electrode and the first negative electrode can be connected, and on the other hand, the first contact switch and the first positive switching end can stably convey electric current.

[0011] Optionally, the shell comprises a bottom shell, a plug hole penetrating through the bottom shell is formed on the side of the bottom shell away from the magnetic driving mechanism, and a sealing gasket is arranged at the plug hole.

[0012] By adopting the above technical scheme, the sealing gasket is installed at the socket, which can effectively prevent dust, moisture and other external environmental factors from entering the magnetic driving mechanism, thereby avoiding corrosion or short circuit of the magnetic driving mechanism, the conductive rod and other key components, and improving the reliability and service life of the two-phase symmetrical magnetic latching relay.

[0013] Optionally, the first contact switch comprises a first shunt piece, and the first shunt piece is provided with a first bending part; and the second contact switch comprises a second shunt piece, and the second shunt piece is provided with a second bending part.

[0014] By adopting the above technical scheme, when the two-phase symmetrical magnetic latching relay is disconnected, the bending part can guide the electric arc, so that the electric arc is quickly extinguished, thereby reducing the ablation and damage to the contact, prolonging the service life of the two-phase symmetrical magnetic latching relay, and improving the reliability thereof.

[0015] Optionally, the number of the first shunt piece and the second shunt piece is three.

[0016] By adopting the above technical scheme, if there is only one shunt piece, the connection may be unstable due to loose connection or poor contact between the shunt piece and the connecting piece; and multiple shunt pieces can provide multiple current paths in a parallel manner, so that even if a certain shunt piece fails, other shunt pieces can still work, ensuring normal operation of the two-phase symmetrical magnetic latching relay, and improving the reliability and stability of the two-phase symmetrical magnetic latching relay.

[0017] Optionally, the shell further comprises an end cover, and the side of the end cover facing the bottom shell is provided with elastic support pads, the number of the elastic support pads is two, and the elastic support pads are respectively pressed against the first negative switching end and the second negative switching end.

[0018] By adopting the above technical scheme, the two-phase symmetrical magnetic latching relay is installed in some vibrating environment, and the elastic support pads are additionally provided, and the elastic support pads are pressed against the first negative switching end and the second negative switching end, so that the first negative switching end and the second negative switching end are prevented from moving when the two-phase symmetrical magnetic latching relay vibrates, and the connection stability of the first relay mechanism and the second relay mechanism is improved.

[0019] Optionally, the periphery of the end cover is further provided with a limiting piece, the limiting piece is provided with a limiting through slot, the outer peripheral side wall of the bottom shell is provided with a first adjusting groove, a trapezoidal block is installed in the first adjusting groove, and the limiting piece is inserted into the first adjusting groove and is clamped with the trapezoidal block.

[0020] By adopting the technical scheme, when the two-phase symmetrical magnetic latching relay is subjected to external impact or vibration, the connection stability between the shell and the end cover can be increased, and movement of internal parts of the two-phase symmetrical magnetic latching relay caused by loosening of the shell and the end cover can be avoided, so that the reliability of the two-phase symmetrical magnetic latching relay as a whole is improved.

[0021] Optionally, two corners of the limiting piece towards the first adjusting groove are transitionally smooth.

[0022] By adopting the technical scheme, the limiting piece can be more conveniently inserted into the first adjusting groove, so that the connection between the end cover and the shell is more convenient, and the two corners of the limiting piece towards the first adjusting groove are prevented from being jammed with the shell to cause inconvenient connection of the end cover and the shell.

[0023] Optionally, a second adjusting groove is further arranged on the outer circumferential sidewall of the bottom shell, and the second adjusting groove is in communication with the first adjusting groove.

[0024] By adopting the technical scheme, the second adjusting groove is additionally arranged, when the end cover and the bottom shell need to be disassembled, an operator can move a hand along the second adjusting groove towards the limiting piece, when the limiting piece is contacted, the limiting piece is pressed towards the outside to be lifted, the clamping block can be slid out of the limiting groove of the limiting piece, the operator can conveniently lift the limiting piece towards the outside, maintenance and replacement in the later period are facilitated, and maintenance time is reduced.

[0025] To sum up, the present application has at least the following beneficial effects:

[0026] 1. The first positive electrode, the second positive electrode, the second negative electrode and the first negative electrode are arranged in sequence, and the first positive electrode and the first negative electrode are symmetrically assembled, so that the same electrodes are arranged between the first relay mechanism and the second relay mechanism, the risk of short circuit caused by cross insulation damage of the first relay mechanism and the second relay mechanism is reduced, and the operation stability and reliability of the whole system are improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A structure diagram of a two-phase symmetrical magnetic latching relay Figure 1 ;

[0028] Figure 2 A structure diagram of a two-phase symmetrical magnetic latching relay Figure 2 ;

[0029] Figure 3 A structure diagram of a two-phase symmetrical magnetic latching relay Figure 3 ;

[0030] Figure 4 A structure diagram of a two-phase symmetrical magnetic latching relay Figure 3 A local enlarged view at A;

[0031] Figure 5 A schematic diagram of the structure of a two-phase symmetrical magnetic latching relay Figure 4 ;

[0032] Figure 6 A schematic diagram of the structure of a two-phase symmetrical magnetic latching relay Figure 5 ;

[0033] Figure 7 This is a schematic diagram of the push rod structure;

[0034] Figure 8 for Figure 1 A magnified view of the area at point B;

[0035] Figure 9 This is a schematic diagram of the end cap structure.

[0036] Reference numerals: 1. Housing; 11. Bottom shell; 111. Socket; 112. Sealing gasket; 113. First adjusting groove; 114. Trapezoidal block; 115. Second adjusting groove; 12. End cap; 121. Elastic support pad; 122. Limiting component; 1221. Limiting through groove; 2. First relay mechanism; 21. First positive electrode; 211. First positive switching terminal; 22. First negative electrode; 221. First negative switching terminal; 23. Conductive component; 24. First contact switch; 241. First stationary contact; 242. First moving contact; 243. First shunt plate; 2431. First bending part; 3. Second relay mechanism; 31. Second positive electrode; 311. Second positive switching terminal; 32. Second negative electrode; 321. 33. Second negative switching terminal; 33. Second contact switch; 331. Second stationary contact; 332. Second moving contact; 333. Second shunt plate; 3331. Second bending part; 4. Magnetic drive mechanism; 41. Coil assembly; 411. Coil bracket; 412. Yoke; 4121. Mounting part; 4122. Connecting part; 413. Coil; 414. Iron core; 42. Magnet assembly; 421. Rotating shaft; 422. Magnet; 4221. Double-headed magnet; 4222. Pull rod; 423. Pressure plate; 43. Switching rod; 431. Push rod; 432. Swing block; 4321. Swing groove; 433. First limit block; 4331. First limit groove; 434. Second limit block; 4341. Second limit groove. Detailed Implementation

[0037] The following section provides a more detailed description, in conjunction with the accompanying diagrams:

[0038] As attached Figure 1 and attached Figure 2 As shown, a two-phase symmetrical magnetic latching relay includes a housing 1, a first relay mechanism 2, a second relay mechanism 3, and a magnetic drive mechanism 4.

[0039] The shell 1 comprises a bottom shell 11, and a through hole 111 is formed in the outer peripheral side wall of the bottom shell 11 on the side opposite to the magnetic driving mechanism 4, and a sealing gasket 112 is arranged at the through hole 111 to prevent dust, moisture and other environmental factors from entering the magnetic driving mechanism 4, thereby improving the reliability and service life of the two-symmetrical magnetic latching relay.

[0040] As shown in Figs. 1 and 2, the first relay mechanism 2 is arranged in the bottom shell 11. Figure 2 As shown in Figs. 1 and 2, the first relay mechanism 2 is arranged in the bottom shell 11. Figure 3 As shown in Figs. 1 and 2, the first relay mechanism 2 is arranged in the bottom shell 11.

[0041] As shown in Figs. 1 and 2, the first relay mechanism 2 is arranged in the bottom shell 11. Figure 3 As shown in Figs. 1 and 2, the first relay mechanism 2 is arranged in the bottom shell 11. Figure 4 As shown in Figs. 1 and 2, the first relay mechanism 2 is arranged in the bottom shell 11.

[0042] One end of the conductive piece 23 is fixedly connected with the first positive switching end 211, and the other end of the conductive piece 23 is provided with the first contact switch 24 for connecting and disconnecting the electrical connection between the first positive switching end 211 and the first negative switching end 221.

[0043] The first contact switch 24 comprises a first static contact 241, a first dynamic contact 242 and a first shunt plate 243.

[0044] The first shunt plate 243 has three first shunt plates 243, one end of each of the three first shunt plates 243 is fixedly connected with the first negative switching end 221, and the first dynamic contact 242 is arranged on the end of the first shunt plate 243 away from the first negative switching end 221.

[0045] The first static contact 241 is arranged on the end of the conductive piece 23 away from the first positive switching end 211, and the first static contact 241 and the first dynamic contact 242 are in abutting contact with each other to realize the electrical connection between the first positive piece 21 and the first negative piece 22.

[0046] The first shunt plate 243 has three first shunt plates 243, one end of each of the three first shunt plates 243 is fixedly connected with the first negative switching end 221, and the first dynamic contact 242 is arranged on the end of the first shunt plate 243 away from the first negative switching end 221.

[0047] As shown in Figs. 1 and 2, the first relay mechanism 2 is arranged in the bottom shell 11. Figure 2 As shown in Figs. 1 and 2, the first relay mechanism 2 is arranged in the bottom shell 11.Figure 3 As shown in the drawings, the second relay mechanism 3 is installed in the bottom shell 11, and the second relay mechanism 3 comprises a second positive pole piece 31 and a second negative pole piece 32.

[0048] As shown in the drawings, Figure 3 and the drawings, Figure 4 As shown in the drawings, the second positive pole piece 31 is located on one side of the first positive pole piece 21, one end of the second positive pole piece 31 is inserted into the bottom shell 11, and the other end extends out of the bottom shell 11, and the end of the second positive pole piece 31 inserted into the bottom shell 11 is a second positive switching end 311; the second negative pole piece 32 is located between the second positive pole piece 31 and the conductive piece 23, one end of the second negative pole piece 32 is inserted into the bottom shell 11, and the other end extends out of the bottom shell 11, and the end of the second negative pole piece 32 inserted into the bottom shell 11 is a second negative switching end 321.

[0049] A second contact switch 33 for connecting or disconnecting the electrical connection between the second positive switching end 311 and the second negative switching end 321 is provided, and the second contact switch 33 comprises a second stationary contact 331, a second movable contact 332, and a second shunt piece 333.

[0050] The number of second shunt pieces 333 is three, one end of each of the three second shunt pieces 333 is fixedly connected to the second negative switching end 321, and a second movable contact 332 is installed on the end of the second shunt piece 333 away from the second negative switching end 321.

[0051] A second stationary contact 331 is installed on the second positive switching end 311, and the second stationary contact 331 and the second movable contact 332 are in abutting contact with each other, realizing the electrical connection between the second positive pole piece 31 and the second negative pole piece 32.

[0052] A second bending portion 3331 is installed on each side of the three second shunt pieces 333 away from the second negative switching end 321, and the second bending portions 3331 on the three second shunt pieces 333 gradually increase towards the second positive switching end 311, and when the electrical connection between the second positive pole piece 31 and the second negative pole piece 32 is disconnected, the second bending portion 3331 can guide the electric arc, so that the electric arc is quickly extinguished, thereby reducing the damage to the second stationary contact 331 and the second movable contact 332.

[0053] As shown in the drawings, Figure 2 and the drawings, Figure 5 As shown in the drawings, the magnetic drive mechanism 4 is installed in the bottom shell 11, and the magnetic drive mechanism 4 is located between the first positive pole piece 21 and the second positive pole piece 31. The magnetic drive mechanism 4 comprises a coil assembly 41 and a magnetic steel assembly 42, and the coil assembly 41 and the magnetic steel assembly 42 are relatively parallel.

[0054] The coil assembly 41 includes a coil support 411 and a yoke 412. There are two coil supports 411, and the two coil supports 411 are fixedly connected to the bottom shell 11 on the side facing inward. A coil 413 and an iron core 414 are installed between the two coil supports 411. The iron core 414 and the coil 413 are coaxial, and the iron core 414 is located inside the coil 413.

[0055] There are two yokes 412. Each yoke 412 includes a mounting part 4121 and a connecting part 4122. The mounting parts 4121 of the two yokes 412 are fixedly connected to both ends of the coil 413, and the connecting parts 4122 of the two yokes 412 are fixedly connected to the mounting parts 4121 perpendicularly. The connecting parts 4122 of the two yokes 412 are both located on the side of the mounting parts 4121 facing the magnet assembly 42.

[0056] The magnet assembly 42 includes a rotating shaft 421, a magnet 422, and a pressure plate 423. One end of the rotating shaft 421 is fixedly connected to the bottom end of the bottom shell 11, and the other end of the rotating shaft 421 extends from the bottom end of the bottom shell 11 in a direction away from the bottom shell 11. The magnet 422 is rotatably connected to the rotating shaft 421, and both ends of the magnet 422 are provided with double-headed magnets 4221 that are adapted to the connecting part 4122 of the yoke 412. A pull rod 4222 is provided on the side of the magnet 422 facing away from the coil assembly 41.

[0057] The pressure plate 423 is located on the side of the magnet assembly 42 facing away from the bottom shell 11, and the pressure plate 423 covers the top of the magnet assembly 42.

[0058] As attached Figure 2 and attached Figure 7 As shown, the magnetic drive mechanism 4 also includes a switching rod 43, which includes a push rod 431. A swing block 432, a first limit block 433, and a second limit block 434 are sequentially installed on the side of the push rod 431 facing the bottom shell 11.

[0059] As attached Figure 6 and attached Figure 7 As shown, the swing block 432 has a swing groove 4321 on the side facing the magnetic drive mechanism 4, and the swing groove 4321 is inserted into the lever 4222. The first limiting block 433 has a first limiting groove 4331 on the side facing the first diverter 243, and the first limiting groove 4331 is inserted into the first diverter 243. The second limiting block 434 has a second limiting groove 4341 on the side facing the second diverter 333, and the second limiting groove 4341 is inserted into the second diverter 333.

[0060] The opposite end of the swing groove 4321, the first limiting groove 4331 and the second limiting groove 4341 is provided with an inclined chamfer, so that the first shunt 243 and the second shunt 333 can be more safely abutted with the groove wall of the first limiting groove 4331 and the second limiting groove 4341, reducing the hidden danger of wear of the first shunt 243 and the second shunt 333.

[0061] As shown in the accompanying drawings Figure 1 and the accompanying drawings Figure 2 As shown in the accompanying drawings

[0062] As shown in the accompanying drawings Figure 3 and the accompanying drawings Figure 9 As shown in the accompanying drawings

[0063] As shown in the accompanying drawings Figure 1 and the accompanying drawings Figure 8 As shown in the accompanying drawings

[0064] The outer peripheral side wall of the bottom shell 11 is provided with a first adjusting groove 113, and the number of the first adjusting groove 113 is multiple. A trapezoidal block 114 is arranged in each first adjusting groove 113. When the end cover 12 is buckled with the bottom shell 11, the limiting piece 122 is inserted into the first adjusting groove 113 one by one, and the limiting through groove 1221 is clamped with the trapezoidal block 114, so that the connection stability between the bottom shell 11 and the end cover 12 can be increased, and the movement of the internal parts of the two symmetrical magnetic latching relays caused by loosening of the bottom shell 11 and the end cover 12 can be avoided, thereby improving the reliability of the two symmetrical magnetic latching relays as a whole.

[0065] The outer peripheral side wall of the shell 1 is further provided with a second adjusting groove 115, and the second adjusting groove 115 is in communication with the first adjusting groove 113. The operator can move the hand along the second adjusting groove 115 towards the limiting piece 122, and when contacting the limiting piece 122, the limiting piece 122 is pressed and lifted towards the outside, that is, the trapezoidal block 114 is slid out of the limiting through groove 1221 of the limiting piece 122, so that the operator can conveniently lift the limiting piece 122 towards the outside.

[0066] The working principle of the embodiment is as follows:

[0067] The coil assembly 41 is opposite to the magnetic steel assembly 42 in parallel. When an external voltage acts on the coil assembly 41, the magnetic field on the coil assembly 41 drives the magnetic steel assembly 42 to deflect around the rotating shaft 421, so that the double-headed magnet 4221 at both ends of the magnetic steel 422 reciprocally contacts and separates from the connecting part 4122 of the two yokes 412. The deflection of the magnetic steel assembly 42 drives the pull rod 4222 to swing left and right. The pull rod 4222 is inserted into the swing groove 4321 on the switching rod 43, and the left and right swinging of the pull rod 4222 drives the push rod 431 to move synchronously. The first limiting groove 4331 drives the first shunt piece 243 and the second limiting groove 4341 drives the second shunt piece 333 to move synchronously, so as to drive the first contact switch 24 and the second contact switch 33 to synchronously connect or synchronously disconnect, so as to complete the synchronous conduction and synchronous breaking of the two-phase circuit.

[0068] The first positive pole piece 21, the second positive pole piece 31, the second negative pole piece 32 and the first negative pole piece 22 are arranged in sequence, and one end of each of them is inserted into the shell 1 and the other end extends out of the shell 1. The first positive pole piece 21 and the first negative pole piece 22 are symmetrically installed, the first positive pole piece 21 is adjacent to the second positive pole piece 31, and the first negative pole piece 22 is adjacent to the second negative pole piece 32, so that the same potential exists between the first relay mechanism 2 and the second relay mechanism 3, thereby avoiding the formation of potential connection between the first relay mechanism 2 and the second relay mechanism 3, reducing the risk of short circuit caused by cross insulation damage of the first relay mechanism 2 and the second relay mechanism 3, and improving the operation stability and reliability of the entire two-phase symmetrical magnetic latching relay.

[0069] The embodiment is only an explanation of the application, and is not a limitation of the application. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the application, they are protected by the patent law.

Claims

1. A two-phase symmetrical magnetic latching relay comprising a housing (1), a magnetic drive mechanism (4), a first relay mechanism (2) and a second relay mechanism (3), characterized in that The first relay mechanism (2) comprises a first positive electrode (21) and a first negative electrode (22), the second relay mechanism (3) comprises a second positive electrode (31) and a second negative electrode (32), the first positive electrode (21), the second positive electrode (31), the second negative electrode (32) and the first negative electrode (22) are sequentially arranged, and one end of each of them is inserted into the shell (1), the end of the first positive electrode (21) inserted into the shell (1) is a first positive switching end (211), the end of the first negative electrode (22) inserted into the shell (1) is a first negative switching end (221), and a first contact switch (24) for connecting or disconnecting electric connection is arranged between the first positive switching end (211) and the first negative switching end (221); the end of the second positive electrode (31) inserted into the shell (1) is a second positive switching end (311), the end of the second negative electrode (32) inserted into the shell (1) is a second negative switching end (321), and a second contact switch (33) for connecting or disconnecting electric connection is arranged between the second positive switching end (311) and the second negative switching end (321), and the magnetic driving mechanism (4) is located in the shell (1) and drives the first contact switch (24) and the second contact switch (33) to be synchronously connected or synchronously disconnected.

2. A two-phase symmetrical magnetic latching relay according to claim 1, characterized in that The first relay mechanism (2) further comprises a conductive part (23), one end of the conductive part (23) is fixedly connected with the first positive switching end (211), and the other end of the conductive part (23) is arranged between the first negative switching end (221) and the first positive switching end (211) and is provided with the first contact switch (24) for connecting or disconnecting electric connection.

3. A two-phase symmetrical magnetic latching relay according to claim 1, characterized in that The shell (1) comprises a bottom shell (11), a socket (111) penetrating through the bottom shell (11) is formed on the side of the bottom shell (11) away from the magnetic driving mechanism (4), and a sealing gasket (112) is mounted at the socket (111).

4. A two-phase symmetrical magnetic latching relay according to claim 1, characterized in that The first contact switch (24) comprises a first shunt piece (243), and the first shunt piece (243) is provided with a first bending part (2431); the second contact switch (33) comprises a second shunt piece (333), and the second shunt piece (333) is provided with a second bending part (3331).

5. A two-phase symmetrical magnetic latching relay according to claim 4, characterized in that The number of the first shunt piece (243) and the second shunt piece (333) is three.

6. A two-phase symmetrical magnetic latching relay according to claim 3, characterized in that The shell (1) further comprises an end cover (12), the side of the end cover (12) facing the bottom shell (11) is provided with elastic supporting pads (121), the number of the elastic supporting pads (121) is two, and the elastic supporting pads (121) are respectively pressed against the first negative switching end (221) and the second negative switching end (321).

7. A two-phase symmetrical magnetic latching relay according to claim 6, characterized in that The end cover (12) is further provided with a limiting part (122) around the periphery, the limiting part (122) is provided with a limiting through slot (1221) penetrating through, the outer peripheral side wall of the bottom shell (11) is provided with a first adjusting groove (113), the first adjusting groove (113) is provided with a trapezoidal block (114), and the limiting part (122) is inserted into the first adjusting groove (113) and is clamped with the trapezoidal block (114).

8. A two-phase symmetrical magnetic latching relay according to claim 7, characterized in that The two corner edges of the limiting part (122) facing the first adjusting groove (113) are transitionally smooth.

9. A two-phase symmetrical magnetic latching relay according to claim 8, characterized in that The outer peripheral side wall of the bottom shell (11) is further provided with a second adjusting groove (115), and the second adjusting groove (115) is communicated with the first adjusting groove (113).

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