Electromagnetic relay having high voltage resistance

Abstract

An electromagnetic relay having high voltage resistance, which comprises a base part and a moving spring armature component; the base part comprises a base as well as a coil, an iron core, and at least one static spring part arranged on the base; the moving spring armature component comprises at least one moving spring part, an armature, a magnet, and a plastic body; the plastic body integrates the moving spring part, the armature, and the magnet into an unified member; an intermediate portion of the moving spring armature component is provided with a weld plate structure, the moving spring armature component is mounted at a top portion of the base part by means of the weld plate structure, and two ends of the armature exposed out of the plastic body correspondingly match with polar faces of two ends of the iron core; the static spring part matches with the moving spring part; the moving spring part separately comprises two moving reeds and an electrically conductive plate, where the two moving reeds are integrally formed with or electrically connected to the electrically conductive plate; the moving spring part is located above the armature, and the two moving reeds are located above two respective sides of the armature in the width direction; the electrically conductive plate is arranged across the armature, and the electrically conductive plate and the two moving reeds are located on the same side of the weld plate structure.

Description

A high-voltage electromagnetic relay

[0001] Cross-references

[0002] This disclosure claims priority to Chinese patent application number 202310017862.4, filed on January 6, 2023, entitled “A High Voltage Electromagnetic Relay”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the technical field of relays, and in particular to a high-voltage electromagnetic relay. Background Art

[0004] With the rapid development of the new energy industry, the application of high-voltage direct current (HVDC) is becoming increasingly widespread and demanding, placing increasingly stringent demands on relays. Miniaturized relays with high-voltage specifications are increasingly popular in the market, but traditional miniaturized relays have limited voltage resistance due to their size. Consequently, users often connect two contacts in series in an external circuit to increase the voltage resistance between disconnected contacts, which can lead to cumbersome circuit designs. To address this, a small, high-voltage normally open relay has emerged in the related art. The contacts in this relay are connected in series, eliminating the need for external circuit board wiring. Specifically, this small relay includes a base portion and a movable spring-armature assembly. The middle portion of the movable spring-armature assembly is mounted on the top of the base portion via a welding plate structure. The movable spring-armature assembly includes a movable spring portion, an armature, a magnet, and a plastic body that is assembled into a single piece by injection molding. The magnet and movable spring portion are respectively located below the armature. The movable spring portion includes two movable spring leaves arranged in parallel and a conductive piece. The conductive piece is integrally molded with the two movable spring leaves, connecting the two movable spring leaves in series. This achieves voltage division within the relay through two sets of contacts, improving the high-voltage breaking capacity of the contacts while maintaining a constant volume. When the contacts are open, the circuit still shows that both sets of contacts are open, thereby improving the voltage resistance between the contacts. However, to ensure sufficient space for the magnet below the armature, in this small relay, the conductive piece is placed on the normally closed side of the movable spring-armature assembly. This results in a longer conductive path for the entire movable spring portion and a higher contact resistance.

[0005] Summary of the Invention

[0006] In response to the technical problems existing in the related art, the present disclosure provides a high-voltage electromagnetic relay, which improves the structure of the dynamic spring part to achieve the purpose of reducing contact resistance.

[0007] The technical solution adopted by the present disclosure to solve the technical problem is as follows: a high-voltage electromagnetic relay, comprising a base portion and a movable spring-armature component, wherein the base portion comprises a base, a coil, an iron core and at least one static spring portion arranged on the base, and the pole surfaces of the two ends of the iron core are exposed upward respectively; the movable spring-armature component comprises at least one movable spring portion, an armature, a magnetic steel, and a plastic body which is assembled into an integral part by injection molding the movable spring portion, the armature and the magnetic steel, wherein the magnetic steel is located below the armature, and the middle portion of the movable spring-armature component is provided with a A welding piece structure, in which the movable spring armature component is mounted on the top of the base portion through the welding piece structure, and the two ends of the armature exposed outside the plastic body respectively correspond to the pole surfaces at the two ends of the iron core; the static spring portion cooperates with the movable spring portion, and the movable spring portion includes two movable spring leaves and a conductive piece, and the two movable spring leaves are respectively integrally formed with or electrically connected to the conductive piece; the movable spring portion is located above the armature, and the two movable spring leaves are respectively located above both sides of the armature in the width direction, the conductive piece spans the armature, and the conductive piece and the two movable spring leaves are located on the same side of the welding piece structure.

[0008] In some embodiments, the conductive sheet and the solder sheet structure are independent of each other, and there is a gap between the conductive sheet and the solder sheet structure, and the gap is filled with a portion of the plastic of the plastic body.

[0009] In some embodiments, the armature is provided with a groove below the conductive sheet, and the groove has openings at both ends in the width direction of the armature, and a gap formed between the groove and the conductive sheet is filled with a portion of the plastic of the plastic body.

[0010] In some embodiments, the static spring part includes two static spring plates, which are respectively located below the two moving spring plates, and the static contacts provided on the two static spring plates correspond one-to-one with the moving contacts provided on the two moving spring plates; the setting heights of the two static spring plates are respectively higher than the heights of the pole surfaces of the iron core; the base is provided with a retaining wall between the static spring plates and the iron core.

[0011] In some embodiments, the number of the movable spring part and the static spring part is one respectively, and they constitute a normally open contact assembly or a normally closed contact assembly; the armature has a first end close to the movable spring part and a second end away from the movable spring part; the area of ​​the contact surface between the first end of the armature and one end of the iron core is greater than the area of ​​the contact surface between the second end of the armature and the other end of the iron core.

[0012] In some embodiments, the bottom of the second end of the armature is partially flattened.

[0013] In some embodiments, both ends of the bottom of the second end of the armature are flattened in the width direction, so that only the middle area of ​​the bottom of the second end of the armature contacts the other end of the iron core.

[0014] In some embodiments, the second end of the armature is shortened so that the size of the contact surface between the first end of the armature and one end of the iron core in a preset direction is larger than the size of the contact surface of the second end of the armature in a preset direction, and the preset direction is the length direction of the armature.

[0015] In some embodiments, the welding plate structure is located above the armature, and the welding plate structure includes two welding plates and a connecting plate. The two welding plates are located above both sides of the middle part of the armature in the width direction. The connecting plate spans the armature and is integrally formed with the two welding plates. Two welding platforms are provided on the top of the base, and the two welding plates are welded and fixed to the two welding platforms one by one.

[0016] In some embodiments, the conductive sheet is completely wrapped in the plastic body, and the base integrates the coil, the iron core, the static spring part, and the coil lead-out terminal into a whole by injection molding.

[0017] Compared with the related art, the present disclosure has the following beneficial effects:

[0018] 1. Since the movable spring portion is disposed above the armature in the present disclosure, the conductive sheet of the movable spring portion does not need to avoid the magnet below the armature, and thus the conductive sheet can be disposed as close as possible to the two movable spring sheets. Specifically, the conductive sheet and the two movable spring sheets are located on the same side of the welding sheet structure, which greatly shortens the conductive path of the entire movable spring portion, thereby achieving the purpose of greatly reducing contact resistance.

[0019] 2. The conductive sheet and the soldering sheet structure are independent of each other, so that once the soldering sheet structure is fixed, it has no effect on the movement of the dynamic spring. Furthermore, the current on the dynamic spring is not conducted to the soldering sheet structure, thereby not affecting the reaction force structure of the relay. Specifically, a gap is provided between the conductive sheet and the soldering sheet structure, which is filled with a portion of the plastic of the plastic body, ensuring insulation between the dynamic spring portion and the soldering sheet structure.

[0020] 3. The armature is provided with a groove below the conductive plate, which increases the distance between the armature and the conductive plate, improving insulation. In particular, the gap between the groove and the conductive plate is filled with a portion of the plastic body, ensuring insulation between the movable spring and the armature.

[0021] 4. The two static springs are respectively arranged at a height higher than the pole surface of the core, which can ensure the insulation performance between the static springs and the core. The base is provided with a retaining wall between the static springs and the core, which can further improve the insulation performance between the static springs and the core.

[0022] 5. The contact surface area between the first end of the armature and one end of the iron core is smaller than the contact surface area between the second end of the armature and the other end of the iron core, which can reduce the magnetic force of the armature away from the second end of the movable spring part, thereby facilitating the attraction of the armature close to the first end of the movable spring part.

[0023] 6. The welding piece structure includes the two welding pieces and a connecting piece. The connecting piece and the two welding pieces are integrally formed so that the connecting piece and the two welding pieces are made of the same sheet material, which can ensure that the flatness and height of the two welding pieces are consistent, thereby ensuring the accuracy of the installation of the movable spring armature component.

[0024] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments; however, the high-voltage electromagnetic relay disclosed in the present disclosure is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of the three-dimensional structure of an electromagnetic relay according to a first embodiment of the present disclosure (excluding the housing).

[0026] FIG2 is a schematic diagram of the three-dimensional structure of the movable spring armature component according to the first embodiment of the present disclosure.

[0027] FIG3 is a schematic diagram showing the positional relationship between the movable spring portion and the welding piece structure of the first embodiment of the present disclosure.

[0028] FIG4 is a schematic structural diagram of the movable spring portion and the static spring portion in a disconnected state according to the first embodiment of the present disclosure.

[0029] FIG5 is a schematic structural diagram of the movable spring portion and the static spring portion in a contact state according to the first embodiment of the present disclosure.

[0030] FIG6 is a partial cross-sectional view of the movable spring armature component according to the first embodiment of the present disclosure.

[0031] FIG7 is a top view of the movable spring armature component of the first embodiment of the present disclosure (excluding the plastic body).

[0032] FIG8 is a schematic diagram of the three-dimensional structure of the armature (including the magnet) according to the first embodiment of the present disclosure.

[0033] FIG9 is a front view of the movable spring armature component of the first embodiment of the present disclosure (excluding the plastic body).

[0034] FIG10 is a schematic structural diagram of the base and some components of the first embodiment of the present disclosure.

[0035] FIG11 is a bottom view of the armature according to the first embodiment of the present disclosure.

[0036] FIG12 is a right side view of the armature according to the first embodiment of the present disclosure.

[0037] FIG13 is a front view of the armature and the core in the mating state (including the magnet) of the second embodiment of the present disclosure.

[0038] Explanation of the accompanying symbols: 1. Base, 11. Soldering station, 12. Retaining wall, 2. Iron core, 3. Static spring piece, 31. Static contact, 32. Static spring lead-out terminal, 4. Armature, 41. Groove, 42. Middle area, 401. First end; 402. Second end; 5. Moving spring part, 51. Moving spring piece, 52. Conductive piece, 53. Moving contact, 6. Plastic body, 7. Soldering piece structure, 71. Soldering piece, 72. Connecting piece, 8. Magnet, 9. Coil lead-out terminal; 10. Gap; X, length direction; Y, width direction; Z, vertical direction. DETAILED DESCRIPTION

[0039] Example 1

[0040] Referring to Figures 1-12, the present invention discloses a high-voltage electromagnetic relay comprising a base portion and a movable spring-armature assembly. The base portion comprises a base 1, a coil, an iron core 2, and at least one static spring portion disposed thereon. Specifically, the base 1 integrates the coil, iron core 2, static spring portion, and coil lead-out terminals 9 into a single unit through injection molding. The pole faces of the iron core 2 are exposed upward at both ends and are located at both ends of the base 1. The movable spring-armature assembly comprises at least one movable spring portion 5, an armature 4, a magnet 8, and a plastic body 6 that integrates the movable spring portion 5, the armature 4, and the magnet 8 into a single unit through injection molding. As shown in Figure 9, the magnet 8 is located below the armature 4. A welding tab structure 7 is provided in the middle portion of the movable spring-armature assembly. The movable spring-armature assembly is mounted to the top of the base portion via the welding tab structure 7, and the two ends of the armature 4 exposed outside the plastic body 6 correspond to the pole faces of the iron core 2. As shown in Figures 4 and 5, the static spring portion and the dynamic spring portion 5 are aligned one-to-one, and the dynamic spring portion 5 includes two parallel dynamic springs 51 and a conductive piece 52 located between the two dynamic springs 51. The conductive piece 52 is integrally formed with the two dynamic springs 51, but this is not limited to this embodiment. In other embodiments, the conductive piece and the two dynamic springs are electrically connected by welding or riveting. As shown in Figure 9, the dynamic spring portion 5 is located above the armature 4, and the two dynamic springs 51 are located above the armature 4 on both sides in the width direction Y. As shown in Figures 6 and 7, the conductive piece 52 spans the armature 4 and, in the vertical direction Z, is located on the same side of the welding piece structure 7 as the two dynamic springs 51. Specifically, as shown in Figure 4, the bottom of each of the two dynamic springs 51, which is away from the welding piece structure 7, is provided with a dynamic contact 53. The other ends of the two dynamic springs 51, which are closer to the welding piece structure 7, are integrally formed with the conductive piece 52.

[0041] In this embodiment, as shown in Figure 3, the conductive sheet 52 and the soldering sheet structure 7 are independent of each other. This ensures that, after the soldering sheet structure 7 is fixed, it has no effect on the movement of the dynamic spring 51. Furthermore, the current flowing through the dynamic spring 51 is not conducted to the soldering sheet structure 7, thereby preventing the relay's reaction force. The conductive sheet 52 is completely encased in the plastic body 6. A gap 10 is defined between the conductive sheet 52 and the soldering sheet structure 7, which is filled with a portion of the plastic body 6. This ensures proper insulation between the dynamic spring 5 and the soldering sheet structure 7.

[0042] In this embodiment, as shown in Figures 3, 6, and 7, the welding tab structure 7 is located above the armature 4 and includes two welding tabs 71 and a connecting tab 72. The two welding tabs 71 are located above the middle portion of the armature 4 on both sides in the width direction Y. The connecting tab 72 spans the armature 4 and is integrally formed with the two welding tabs 71. This ensures that the connecting tab 72 and the two welding tabs 71 are formed from the same sheet of material, ensuring that the flatness and height of the two welding tabs 71 are consistent, thereby ensuring the accuracy of the installation of the movable spring armature component. The use of an integrated structure for the two welding tabs 71 can improve the rigidity of the welding tabs to a certain extent. As shown in Figure 10, two welding platforms 11 are provided on the top of the base 1, and the two welding tabs 71 are welded to the two welding platforms 11 one by one. For example, the two welding tabs 71 can be laser welded or resistance welded to the welding platform 11. As shown in Figure 2, the welding tab structure 7 is inserted into the plastic body 6. Once the welding tab structure 7 is welded to the welding platform 11, the movable spring armature assembly can be mounted on top of the base portion. The present disclosure places the welding tab structure 7 above the armature 4 to avoid encroaching on the magnetic steel placement space below the armature 4. The hollowed-out middle portion of the connecting tab 72 reduces weight and material consumption, and facilitates stress relief for the connecting tab 72, making it less susceptible to deformation caused by thermal expansion and contraction.

[0043] In this embodiment, as shown in Figures 8 and 9, the armature 4 is provided with a groove 41 below the conductive sheet 52, which increases the distance between the armature 4 and the conductive sheet 52 and improves insulation. The gap between the groove 41 and the conductive sheet 52 is filled with a portion of the plastic of the plastic body 6, ensuring insulation between the movable spring portion 5 and the armature 4. The groove 41 has openings at both ends of the width direction of the armature 4. That is, the groove 41 is open to the outside at both ends of the width direction Y of the armature 4, forming an open shape. In other words, the groove 41 is a through slot that is continuous in the width direction Y. This ensures that the armature 4 has a large distance from the conductive sheet 52 at all locations where the groove 41 is located.

[0044] In this embodiment, as shown in Figure 4 , the static spring portion includes two static springs 3, which are respectively located below the two moving springs 51, and the static contacts 31 provided on the two static springs 3 correspond one-to-one with the moving contacts 53 provided on the two moving springs 51. As shown in Figure 1 , in the vertical direction Z, the height of the two static springs 3 is higher than the height of the pole surface of the iron core 2, which can ensure the insulation performance between the static springs 3 and the iron core 2. As shown in Figure 10 , the base 1 is provided with a retaining wall 12 between the static springs 3 and the iron core 2, which can further improve the insulation performance between the static springs 3 and the iron core 2.

[0045] In this embodiment, the number of the movable spring part 5 and the static spring part is one respectively, and they constitute a normally open contact assembly. Therefore, the present disclosure constitutes a normally open relay, as shown in Figure 10, and its base part has only four lead terminals (including two coil lead terminals 9 and two static spring lead terminals 32). There is a large isolation between the four lead terminals, so that there is a large creepage distance and air gap between the coil and the contact.

[0046] In this embodiment, as shown in Figure 9 , a magnet 8 is disposed below the armature 4. The magnet 8 generates a magnetic field that magnetizes the armature 4 and the core 2, creating an attractive force between the armature 4 and the core 2, causing them to be attracted together. This attractive force can be referred to as the magnetic force between the armature 4 and the core 2. As shown in Figure 7 , the armature 4 has a first end 401 proximal to the movable spring portion 5 and a second end 402 distal to the movable spring portion 5. The two ends of the armature 4 in the longitudinal direction X constitute the first end 401 and the second end 402, respectively. The contact area between the first end 401 of the armature 4 and one end of the core 2 is greater than the contact area between the second end 402 of the armature 4 and the other end of the core 2. Since the relay disclosed herein is a normally open relay, the first end 401 of the armature 4 proximal to the movable spring portion 5 is the normally open end, and the second end 402 of the armature 4 distal to the movable spring portion 5 is the normally closed end. This is equivalent to reducing the contact area between the armature 4 and the core 2 on the normally closed side. Consequently, magnetic flux lines can only pass through the reduced area, weakening the magnetic field on the normally closed side. This in turn reduces the magnetic force on the armature 4 on the normally closed side, improving the force matching problem of the normally open relay and increasing the attraction capability of the armature 4 on the normally open side, thereby facilitating the attraction of the movable spring-armature component on the normally open side. This is because if the contact areas of the two ends of the armature 4 (the first end 401 and the second end 402) with the pole surface of the core 2 were the same, the magnetic forces on both ends of the armature 4 would be the same. However, since the movable spring-armature component has no contacts on the normally closed side and only the normally open side, there is an additional contact pressure on the normally open side (i.e., when the static contact 31 and the movable contact 53 are attracted, the static contact 31 exerts a reaction force on the movable contact 53, which is the contact pressure). This results in an unbalanced force on both sides of the armature 4, making attraction of the normally open side of the relay more difficult. In other embodiments, the movable spring portion 5 and the static spring portion constitute a normally closed contact assembly.

[0047] In this embodiment, the bottom portion of the second end 402 of the armature 4, away from the movable spring portion 5, is partially flattened. This ensures that the contact surface area between the first end 401 of the armature 4 and one end of the core 2 is greater than the contact surface area between the second end 402 of the armature 4 and the other end of the core 2. Specifically, as shown in Figures 11 and 12, the bottom portion of the second end 402 of the armature 4 is flattened at both ends in the width direction Y, resulting in a structure where the second end 402 of the armature 4, away from the movable spring portion 5, is thicker in the middle region 42 and thinner at both ends. Furthermore, the thickness of the second end 402 of the armature 4 gradually decreases from the middle toward both ends in the width direction Y. The middle region 42 is elongated and extends along the length direction X of the armature 4. The surrounding contours of the middle region 42 are square. As shown in Figure 12, the bottom surfaces of the second end 402 of the armature 4 are each formed with an inclined surface 43 at both ends, gradually transitioning toward the middle region 42. Therefore, only the middle region 42 of the bottom of the second end 402 of the armature 4 contacts the other end of the core 2. This results in greater magnetic flux leakage from both ends of the second end 402 of the armature 4 in the width direction Y. The magnetic field generated by the magnet 8 is concentrated in the middle region 42, thereby reducing the magnetic force. This also ensures that the force on the second end 402 of the armature 4, which is away from the movable spring portion 5, is balanced in the width direction Y, preventing it from deviating to one side in the width direction Y.

[0048] The disclosed high-voltage electromagnetic relay features two movable springs 51 integrally formed with a conductive sheet 52, creating a series connection between two sets of contacts. The two sets of contacts are shown in Figure 4 for the open state and in Figure 5 for the closed state. In Figure 5, arrows indicate the direction of current flow. Internally, the relay divides the voltage between the two sets of contacts, improving the high-voltage breaking capacity while maintaining a constant volume. Furthermore, when the contacts open, both sets of contacts in the circuit are simultaneously disconnected, thereby increasing the contact gap and significantly improving the voltage withstand capability between the contacts.

[0049] In a high-voltage electromagnetic relay disclosed herein, the movable spring portion 5 is positioned above the armature 4, eliminating the need for the conductive piece 52 of the movable spring portion 5 to avoid the magnetic steel 8 below the armature 4. Consequently, the conductive piece 52 can be positioned as close as possible to the two movable spring pieces 51. Specifically, the conductive piece 52 and the two movable spring pieces 51 are positioned on the same side of the welding piece structure 7, significantly shortening the conductive path of the entire movable spring portion 5 and thereby significantly reducing contact resistance.

[0050] Example 2

[0051] Referring to FIG. 13 , a high-voltage electromagnetic relay disclosed herein differs from the first embodiment described above in that the second end 402 of the armature 4, distal to the movable spring portion 5, is shortened, so that the contact surface between the first end 401 of the armature 4, proximate to the movable spring portion 5, and one end of the core 2 is larger in a predetermined direction than the contact surface between the second end 402 of the armature 4, distal to the movable spring portion 5, and the other end of the core 2. The predetermined direction is the longitudinal direction X of the armature 4. Consequently, a certain horizontal spacing L exists between the second end 402 of the armature 4, distal to the movable spring portion 5, and the outer edge of the other end of the core 2, while the outer edge of the first end 401 of the armature 4, proximate to the movable spring portion 5, is aligned vertically with the outer edge of the one end of the core 2, or the outer edge of the first end 401 of the armature 4, proximate to the movable spring portion 5, slightly protrudes beyond the outer edge of the one end of the core 2. In this way, it is also possible to achieve that the area of ​​the contact surface between the first end 401 of the armature 4 close to the movable spring part 5 and one end of the iron core 2 is smaller than the area of ​​the contact surface between the second end 402 of the armature 4 away from the movable spring part 5 and the other end of the iron core 2, thereby reducing the magnetic force of the armature 4 away from the second end 402 of the movable spring part 5 (i.e., the normally closed side), thereby facilitating the attraction of the normally open side of the movable spring-armature component.

[0052] The present invention discloses a high-voltage electromagnetic relay, and the unrelated parts are the same as those in the related art or can be implemented by using the related art.

[0053] The above embodiments are only used to further illustrate a high-voltage electromagnetic relay disclosed herein, but the present disclosure is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present disclosure shall fall within the protection scope of the technical solution of the present disclosure.

Claims

1. A high-voltage electromagnetic relay, comprising a base portion and a movable spring-armature component, the base portion comprising a base, a coil, an iron core and at least one static spring portion arranged on the base, the pole surfaces of the iron core being respectively exposed upward; the movable spring-armature component comprising at least one movable spring portion, an armature, a magnetic steel, and a plastic body which is formed by integrating the movable spring portion, the armature and the magnetic steel into an integral part by injection molding, the magnetic steel being located below the armature, a welding piece structure being provided at the middle portion of the movable spring-armature component, the movable spring-armature component being mounted on the top of the base portion via the welding piece structure, and the two ends of the armature exposed outside the plastic body respectively corresponding to the pole surfaces of the iron core; the static spring portion cooperates with the movable spring portion, the movable spring portion comprising two movable spring leaves and a conductive piece, the two movable spring leaves being respectively integrally formed with or electrically connected to the conductive piece; wherein, The movable spring portion is located above the armature, and the two movable spring plates are respectively located above both sides of the armature in the width direction. The conductive plate spans the armature, and in the vertical direction, the conductive plate and the two movable spring plates are located on the same side of the welding plate structure.

2. The high-voltage electromagnetic relay according to claim 1, wherein: The conductive sheet and the solder sheet structure are independent of each other, and there is a gap between the conductive sheet and the solder sheet structure, and the gap is filled with a portion of plastic of the plastic body.

3. The high-voltage electromagnetic relay according to claim 1, wherein: The armature is provided with a groove below the conductive sheet. The groove has openings at both ends in the width direction of the armature. The gap formed between the groove and the conductive sheet is filled with a portion of the plastic of the plastic body.

4. The high-voltage electromagnetic relay according to claim 1, wherein: The static spring part includes two static spring leaves, which are respectively located below the two moving spring leaves, and the static contacts provided on the two static spring leaves respectively correspond to the moving contacts provided on the two moving spring leaves; in the vertical direction, the setting heights of the two static spring leaves are respectively higher than the height of the pole surface of the iron core; the base is provided with a retaining wall between the static spring leaves and the iron core.

5. The high-voltage electromagnetic relay according to claim 1, wherein: The number of the movable spring part and the number of the static spring part are respectively one, and they constitute a normally open contact assembly or a normally closed contact assembly; the armature has a first end close to the movable spring part and a second end away from the movable spring part; the area of ​​the contact surface between the first end of the armature and one end of the iron core is greater than the area of ​​the contact surface between the second end of the armature and the other end of the iron core.

6. The high-voltage electromagnetic relay according to claim 5, wherein: The bottom of the second end of the armature is partially flattened.

7. The high-voltage electromagnetic relay according to claim 6, wherein: The bottom of the second end of the armature is flattened at both ends in the width direction, so that only the middle area of ​​the bottom of the second end of the armature contacts the other end of the iron core.

8. The high-voltage electromagnetic relay according to claim 5, wherein: The second end of the armature is shortened so that the size of the contact surface between the first end of the armature and one end of the iron core in a preset direction is larger than the size of the contact surface between the second end of the armature and the other end of the iron core in a preset direction, and the preset direction is the length direction of the armature.

9. The high-voltage electromagnetic relay according to claim 1, wherein: The welding plate structure is located above the armature, and the welding plate structure includes two welding plates and a connecting plate. The two welding plates are located above the middle part of the armature on both sides in the width direction. The connecting plate spans the armature and is integrally formed with the two welding plates. Two welding platforms are provided on the top of the base, and the two welding plates are welded and fixed to the two welding platforms one by one.

10. The high-voltage electromagnetic relay according to claim 1, wherein: The conductive sheet is completely wrapped in the plastic body, and the base integrates the coil, the iron core, the static spring part, and the coil lead-out terminal into a whole by injection molding.

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