High-voltage electromagnetic relay

Abstract

The present disclosure provides a high-voltage electromagnetic relay including a base portion and a movable spring armature member, wherein the base portion includes a base, a coil provided on the base, an iron core, and at least one fixed spring portion; the movable spring armature member includes at least one movable spring portion, an armature, a magnet steel, and a plastic body, the plastic body integrating the movable spring portion, the armature, and the magnet steel; a welded piece structure is provided at a middle portion of the movable spring armature member; and the movable spring armature member is attached to the top of the base portion via the welded piece structure; and The ends of the armature exposed outside the plastic body correspond to and cooperate with the pole surfaces at both ends of the iron core, the fixed spring portion cooperates with the movable spring portion, the movable spring portion includes two movable spring pieces and a conductive piece, the two movable spring pieces are each integrally molded with or electrically connected to the conductive piece, the movable spring portion is located above the armature, and the two movable spring pieces are respectively located above both sides of the armature in the width direction, the conductive piece straddles the armature, and the conductive piece and the two movable spring pieces are located on the same side of the welded piece structure.

Description

[Technical Field]

[0001] [Cross-Citation of Related Applications] This disclosure claims priority to a Chinese patent application bearing application number 202310017862.4, filed on January 6, 2023, entitled "High-Voltage Electromagnetic Relay," the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the field of relay technology, and more particularly to a high-voltage electromagnetic relay. [Background technology]

[0003] With the rapid development of the new energy industry, high-voltage DC applications are becoming more widespread and increasingly demanding, leading to increasingly stringent requirements for relays. While miniaturizing high-voltage relays has become increasingly popular, traditional miniaturized relays have limited withstand voltage due to their volume. Therefore, users can improve the withstand voltage between the open contacts by connecting two contacts in series in the external circuit, which complicates circuit design. For this reason, related technologies have developed high-voltage normally open miniature relays, whose internal contacts are connected in series, eliminating the need for external plate serial processing. Specifically, this miniature relay comprises a base and a movable spring armature, the middle of which is attached to the top of the base via a welded piece structure, and the movable spring armature comprises a movable spring section, an armature, magnetic steel, and a plastic body which is injection-molded to integrate the movable spring section, armature, and magnetic steel, the magnetic steel, and the movable spring section being located below the armature, and the movable spring section comprises two movable spring pieces and one conductive piece which are arranged in parallel, and the conductive piece is integrally molded with the two movable spring pieces, connecting the two movable spring pieces in series, thereby dividing the pressure inside the relay by two sets of contacts and improving the high-voltage interrupting ability of the contacts without changing the volume, and when the contacts are turned off, two sets of contacts are still turned off in the circuit, improving the voltage-withstanding ability between the contacts. However, in such a small relay, in order to have sufficient space below the armature for arranging the magnetic steel, arranging the conductive piece on the normally closed side of the movable spring armature member lengthens the conductive path of the entire movable spring portion, resulting in high contact resistance. Summary of the Invention

[0004] The present disclosure provides a high-voltage electromagnetic relay that addresses the technical problems present in the related art by improving the structure of the movable spring portion and achieving the objective of reducing contact resistance.

[0005] The technical solution adopted to solve the technical problem of the present disclosure is a high-voltage electromagnetic relay comprising a base portion and a movable spring armature member, wherein the base portion comprises a base, a coil provided on the base, an iron core, and at least one fixed spring portion, and the pole faces at both ends of the iron core are exposed upward, and the movable spring armature member comprises at least one movable spring portion, an armature, a magnet steel, and a plastic body that integrates the movable spring portion, the armature, and the magnet steel by injection molding, and the magnet steel is located below the armature, and a welded piece structure is provided in the middle portion of the movable spring armature member, and the movable spring armature The armature member is attached to the top of the base portion via a welded piece structure, and both ends of the armature exposed outside the plastic body correspond to and cooperate with the pole surfaces at both ends of the iron core. The fixed spring portion cooperates with a movable spring portion, and the movable spring portion includes two movable spring pieces and a conductive piece. The two movable spring pieces are integrally formed with or electrically connected to the conductive pieces. The movable spring portion is located above the armature, and the two movable spring pieces are located above both sides of the armature in the width direction. The conductive piece straddles the armature, and the conductive piece and the two movable spring pieces are located on the same side of the welded piece structure. In some embodiments, the conductive piece and the welding piece structure are independent of each other, and there is a gap between the conductive piece and the welding piece structure, and the gap is filled with a portion of the plastic of the plastic body.

[0006] In some embodiments, a groove is provided in a portion of the armature below the conductive piece, and openings are provided at both ends of the groove in the width direction of the armature, and a gap formed between the groove and the conductive piece is filled with a part of the plastic of the plastic body.

[0007] In some embodiments, the fixed spring portion includes two fixed spring pieces, which are respectively located below the two movable spring pieces, and the fixed contacts provided on the two fixed spring pieces cooperate with the movable contacts provided on the two movable spring pieces in a one-to-one correspondence, respectively, and the installation heights of the two fixed spring pieces are higher than the height of the pole faces of the iron core, and the base provides a partition between the fixed spring pieces and the iron core.

[0008] In some embodiments, the number of the movable spring portion and the fixed spring portion is one each, constituting a normally open contact assembly or a normally closed contact assembly, the armature having a first end close to the movable spring portion and a second end remote from the movable spring portion, and the contact surface area between the first end of the armature and one end of the iron core is larger than the contact surface area between the second end of the armature and the other end of the iron core.

[0009] In some embodiments, the bottom of the second end of the armature is partially flattened.

[0010] In some embodiments, both ends of the bottom of the second end of the armature in the width direction are flattened, so that only a middle region of the bottom of the second end of the armature contacts the other end of the iron core.

[0011] In some embodiments, the shortening of the second end of the armature causes a dimension of a contact surface between the first end of the armature and one end of the iron core in a predetermined direction to be larger than a dimension of a contact surface at the second end of the armature in a predetermined direction, the predetermined direction being the length direction of the armature.

[0012] In some embodiments, the welding piece structure is located above the armature, and the welding piece structure includes two welding pieces and one connecting piece, the two welding pieces are located above both sides in the width direction of a central part of the armature, the connecting piece straddles the armature and is integrally formed with the two welding pieces, two welding tables are provided on the top of the base, and the two welding pieces are welded and fixed to the two welding tables one by one.

[0013] In some embodiments, the conductive piece is completely enclosed in the plastic body, and the base integrates the coil, iron core, fixed spring portion, and coil lead terminal by injection molding.

[0014] Compared with the related art, the present disclosure has the following beneficial effects:

[0015] 1. In the present disclosure, the movable spring part is disposed above the armature, so that the conductive piece of the movable spring part does not need to avoid the magnetic steel below the armature, and the conductive piece can be installed as close as possible to the two movable spring pieces. Specifically, the conductive piece and the two movable spring pieces are located on the same side of the welded piece structure, thereby significantly shortening the conductive path of the entire movable spring part and achieving the purpose of significantly reducing contact resistance.

[0016] 2. Because the conductive piece and the welded piece structure are independent of each other, the welded piece structure does not affect the operation of the movable spring piece after being fixed, and the current in the movable spring piece does not conduct to the welded piece structure, which does not affect the reaction force structure of the relay. In particular, there is a gap between the conductive piece and the welded piece structure, and this gap is filled with plastic from the plastic body, which ensures the insulation performance between the movable spring part and the welded piece structure.

[0017] 3. The groove formed in the armature below the conductive piece increases the gap between the armature and the conductive piece, resulting in a better insulating effect. In particular, the gap formed between the groove and the conductive piece is filled with plastic from the plastic body, thereby ensuring the insulating performance between the movable spring part and the armature.

[0018] 4. The installation height of the two fixed spring pieces is higher than the height of the pole faces of the iron core, thereby ensuring the insulation performance between the fixed spring pieces and the iron core. The base provides a partition between the fixed spring pieces and the iron core, thereby further improving the insulation performance between the fixed spring pieces and the iron core.

[0019] 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, thereby reducing the force of the magnetic steel at the second end of the armature that is far from the movable spring portion and facilitating the attraction of the first end of the armature that is close to the movable spring portion.

[0020] 6. The welded piece structure includes the two welded pieces and one connecting piece, and the connecting piece is integrally molded with the two welded pieces. Therefore, the connecting piece and the two welded pieces are processed and formed from the same sheet, and the flatness and height of the two welded pieces can be matched, thereby ensuring the accuracy of the installation of the movable spring armature member.

[0021] The present disclosure will be described in more detail below with reference to the drawings and examples, but the high-voltage electromagnetic relay of the present disclosure is not limited to the examples. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a perspective structural schematic diagram (not including a housing) of an electromagnetic relay according to a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a perspective structural schematic diagram of a movable spring armature member according to the first embodiment of the present disclosure. [Figure 3] 1 is a schematic diagram illustrating a positional relationship between a movable spring portion and a welded piece structure according to a first embodiment of the present disclosure. FIG. [Figure 4] FIG. 2 is a structural schematic diagram of a movable spring portion and a fixed spring portion in an OFF state according to the first embodiment of the present disclosure. [Figure 5] 1 is a structural schematic diagram illustrating a contact state between a movable spring portion and a fixed spring portion according to Example 1 of the present disclosure. [Figure 6] FIG. 2 is a partial cross-sectional view of a movable spring armature member according to the first embodiment of the present disclosure. [Figure 7] 1 is a plan view of a movable spring armature member (not including a plastic body) according to a first embodiment of the present disclosure. [Figure 8] 1 is a perspective structural schematic diagram of an armature (including magnet steel) according to a first embodiment of the present disclosure. [Figure 9] 1 is a front view of a movable spring armature member (not including a plastic body) according to a first embodiment of the present disclosure. [Figure 10] 1 is a structural schematic diagram of a base and a partial member according to Example 1 of the present disclosure. [Figure 11] FIG. 2 is a bottom view of the armature according to the first embodiment of the present disclosure. [Figure 12] FIG. 2 is a right side view of the armature according to the first embodiment of the present disclosure. [Figure 13] FIG. 10 is a front view of a cooperative state of an armature and an iron core (including magnet steel) according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] Example 1 1 to 12, a high-voltage electromagnetic relay according to the present disclosure includes a base portion and a movable spring armature member, and the base portion includes a base 1, a coil provided on the base 1, an iron core 2, and at least one fixed spring portion. Specifically, the base 1 integrates the coil, iron core 2, fixed spring portion, and coil lead-out terminal 9 by injection molding, and the pole faces at both ends of the iron core 2 are exposed upward and located at both ends of the base 1. The movable spring armature member comprises at least one movable spring portion 5, an armature 4, a magnetic steel 8, and a plastic body 6 which integrates the movable spring portion 5, the armature 4 and the magnetic steel 8 by injection molding. As shown in FIG. 9 , the magnetic steel 8 is located below the armature 4, a welded piece structure 7 is provided in the middle of the movable spring armature member, and the movable spring armature member is attached to the top of the base portion via the welded piece structure 7, and both ends exposed outside the plastic body 6 of the armature 4 correspond to and cooperate with the pole faces at both ends of the iron core 2, respectively. As shown in Figures 4 and 5, the fixed spring portion cooperates with the movable spring portion 5 in a one-to-one correspondence, and the movable spring portion 5 includes two movable spring pieces 51 arranged in parallel and a conductive piece 52 located between the two movable spring pieces 51, and the conductive piece 52 is integrally formed with the two movable spring pieces 51, but this is not limited to this, and in other embodiments, the conductive piece and the two movable spring pieces are electrically connected by methods such as welding or rivets. As shown in FIG. 9, the movable spring portion 5 is located above the armature 4, and the two movable spring pieces 51 are located above both sides of the armature 4 in the width direction Y, respectively. As shown in FIGS. 6 and 7, the conductive piece 52 straddles the armature 4, and in the vertical direction Z, the conductive piece 52 and the two movable spring pieces 51 are located on the same side of the welded piece structure 7. Specifically, as shown in FIG. 4, a movable contact 53 is provided at the bottom of one end of each of the two movable spring pieces 51 that is remote from the welded piece structure 7, and the other ends of each of the two movable spring pieces 51 that are close to the welded piece structure 7 are each integrally formed with the conductive piece 52.

[0024] 3, the conductive piece 52 and the welded piece structure 7 are independent of each other, so that after the welded piece structure 7 is fixed, it does not affect the operation of the movable spring piece 51, and the current in the movable spring piece 51 does not conduct to the welded piece structure 7, thereby not affecting the reaction structure of the relay. The conductive piece 52 is completely enclosed in the plastic body 6, and there is a gap 10 between the conductive piece 52 and the welded piece structure 7, which is filled with some plastic from the plastic body 6. In this way, the insulation performance between the movable spring part 5 and the welded piece structure 7 can be ensured.

[0025] In this embodiment, as shown in FIGS. 3, 6, and 7, the welded piece structure 7 is located above the armature 4 and includes two welded pieces 71 and one connecting piece 72. The two welded pieces 71 are located above both sides of the center of the armature 4 in the width direction Y, and the connecting piece 72 straddles the armature 4 and is integrally formed with the two welded pieces 71. In this manner, the connecting piece 72 and the two welded pieces 71 are processed and formed from the same sheet, which allows the flatness and height of the two welded pieces 71 to be consistent and ensures the accuracy of the installation of the movable spring armature member. The two welded pieces 71 are integrally structured to increase their rigidity to a certain extent. As shown in FIG. 10, two welding tables 11 are provided on the top of the base 1, and the two welded pieces 71 are welded and fixed to the two welding tables 11, respectively. For example, the two welding pieces 71 may be welded to the welding table 11 by laser welding or resistance welding. As shown in FIG. 2, the welding piece structure 7 is inserted into the plastic body 6, and after the welding piece structure 7 is welded to the welding table 11, the movable spring armature member can be attached to the top of the base portion. In the present disclosure, the welding piece structure 7 is provided above the armature 4, thereby avoiding the occupation of the space required for arranging the magnetic steel below the armature 4. The middle of the connecting piece 72 is designed with an openwork design, which can reduce weight and save materials and is beneficial to stress relief of the connecting piece 72, making it less susceptible to deformation due to thermal expansion and contraction.

[0026] In this embodiment, as shown in Figures 8 and 9, a groove 41 is provided in the armature 4 below the conductive piece 52, thereby increasing the gap between the armature 4 and the conductive piece 52 and providing better insulation. The gap formed between the groove 41 and the conductive piece 52 is filled with a portion of the plastic of the plastic body 6, thereby ensuring insulation between the movable spring portion 5 and the armature 4. The groove 41 has openings at both ends in the width direction of the armature 4, i.e., both ends of the groove 41 in the width direction Y of the armature 4 are open to the outside. In other words, the groove 41 is a through groove that penetrates in the width direction Y. This ensures a large gap between the armature 4 and the conductive piece 52 at the position where the groove 41 is located.

[0027] In this embodiment, as shown in Fig. 4, the fixed spring portion includes two fixed spring pieces 3, which are located below the two movable spring pieces 51, respectively, and the fixed contacts 31 provided on the two fixed spring pieces 3 cooperate with the movable contacts 53 provided on the two movable spring pieces 51 in a one-to-one correspondence. As shown in Fig. 1, the installation height of the two fixed spring pieces 3 in the vertical direction Z is higher than the height of the pole faces of the iron core 2, thereby ensuring insulation performance between the fixed spring pieces 3 and the iron core 2. As shown in Fig. 10, the base 1 can also be provided with a partition wall 12 between the fixed spring pieces 3 and the iron core 2 to further improve insulation performance between the fixed spring pieces 3 and the iron core 2.

[0028] In this embodiment, the number of the movable spring portion 5 and the fixed spring portion is one each, and thus a normally open contact assembly is formed. Therefore, the present disclosure forms a normally open relay, and as shown in FIG. 10, the base portion has only four lead terminals (including two coil lead terminals 9 and two fixed spring lead terminals 32), and there is a large separation between the four lead terminals, thereby providing a large creepage distance and air gap between the coil and the contacts.

[0029] 9, the magnetic steel 8 is provided below the armature 4. The magnetic steel 8 generates a magnetic field to magnetize the armature 4 and the iron core 2, thereby generating an attractive force between the armature 4 and the iron core 2, which can be referred to as the magnetic steel force between the armature 4 and the iron core 2. As shown in FIG. 7, the armature 4 has a first end 401 close to the movable spring portion 5 and a second end 402 remote from the movable spring portion 5, and both ends of the armature 4 in the longitudinal direction X constitute the first end 401 and the second end 402, respectively. The contact surface area between the first end 401 of the armature 4 and one end of the iron core 2 is larger than the contact surface area between the second end 402 of the armature 4 and the other end of the iron core 2. Since the relay of the present disclosure is a normally-open relay, the first end 401 of the armature 4 close to the movable spring portion 5 is one end on the normally-open side, and the second end 402 of the armature 4 remote from the movable spring portion 5 is one end on the normally-closed side. This corresponds to a reduction in the contact area between the one end of the armature 4 on the normally-closed side and the iron core 2, so that the magnetic field on the normally-closed side can be weakened only through the reduced area, further reducing the magnetic steel force on the normally-closed side of the armature 4, improving the force matching problem of the normally-open relay, improving the attraction ability on the normally-open side of the armature 4, and facilitating attraction of the movable spring armature member on the normally-open side. This is because, when the contact surface areas between both ends of the armature 4 (first end 401 and second end 402) and the pole faces of the iron core 2 match, the magnetic steel forces at both ends of the armature 4 match, but since there is no contact on the normally closed side of the movable spring armature member and there is a contact only on the normally open side, the contact pressure is greater on the normally open side (i.e., when the fixed contact 31 and the movable contact 53 are attracted to each other, the fixed contact 31 has a reaction force against the movable contact 53, and this reaction force is the contact pressure), which causes an imbalance of forces on both sides of the armature 4, making it difficult for the normally open side of the relay to be attracted to each other. In another embodiment, the movable spring portion 5 and the fixed spring portion constitute a normally closed contact assembly.

[0030] In this embodiment, by partially flattening the bottom of the second end 402 of the armature 4 remote from the movable spring portion 5, the area of ​​the contact surface between the first end 401 of the armature 4 and one end of the iron core 2 becomes larger than the area of ​​the contact surface between the second end 402 of the armature 4 and the other end of the iron core 2. Specifically, as shown in Figures 11 and 12, both ends of the bottom of the second end 402 of the armature 4 in the width direction Y are flattened, so that the second end 402 of the armature 4 remote from the movable spring portion 5 has a thick middle region 42 and thin both ends, and 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 intermediate region 42 has an elongated shape and extends along the longitudinal direction X of the armature 4. The outline around the intermediate region 42 is rectangular, and as shown in FIG. 12 , the bottom surfaces of both ends of the second end 402 of the armature 4 each form a slope 43 that gradually transitions toward the intermediate region 42. Therefore, at the bottom of the second end 402 of the armature 4, only the intermediate region 42 contacts the other end of the iron core 2, increasing leakage magnetic flux at both ends in the width direction Y of the second end 402 of the armature 4, and the magnetic field generated by the magnet steel 8 is concentrated in the intermediate region 42, thereby reducing the magnet steel force. In this way, the force at the second end 402 of the armature 4, which is away from the movable spring portion 5, is balanced in the width direction Y and is not biased to one side in the width direction Y.

[0031] In the high-voltage electromagnetic relay of the present disclosure, two movable spring pieces 51 are integrally formed with conductive pieces 52, thereby connecting two sets of contacts in series, the OFF state of the two sets of contacts being shown in FIG. 4, and the ON state of the two sets of contacts being shown in FIG. 5, where the arrows indicate the direction of current. The inside of the relay is divided by the two sets of contacts, improving the high-voltage interruption capability of the contacts without changing the volume, and when the contacts are turned OFF, the two sets of contacts in the circuit are turned OFF simultaneously, improving the contact gap and significantly improving the voltage resistance between the contacts.

[0032] In the high-voltage electromagnetic relay of the present disclosure, the movable spring portion 5 is installed above the armature 4, and the conductive piece 52 of the movable spring portion 5 does not need to avoid the magnetic steel 8 below the armature 4, so the conductive piece 52 can be installed as close as possible to the two movable spring pieces 51. In particular, in the present disclosure, the conductive piece 52 and the two movable spring pieces 51 are provided on the same side of the welded piece structure 7, thereby significantly shortening the conductive path of the entire movable spring portion 5 and achieving the objective of significantly reducing contact resistance.

[0033] Example 2 As shown in FIG. 13 , the high-voltage electromagnetic relay of the present disclosure differs from the first embodiment in that, since the second end 402 of the armature 4 remote from the movable spring portion 5 is shorter, the dimension in a predetermined direction of the contact surface between the first end 401 of the armature 4 close to the movable spring portion 5 and one end of the iron core 2 is larger than the dimension in the predetermined direction of the contact surface between the second end 402 of the armature 4 remote from the movable spring portion 5 and the other end of the iron core 2, and the predetermined direction is the longitudinal direction X of the armature 4. Therefore, there is a certain horizontal distance L between the second end 402 of the armature 4 remote from the movable spring portion 5 and the outer edge of the other end of the iron core 2, and the outer edge of the first end 401 of the armature 4 close to the movable spring portion 5 is vertically aligned with the outer edge of one end of the iron core 2, or the outer edge of the first end 401 of the armature 4 close to the movable spring portion 5 protrudes slightly beyond the outer edge of one end of the iron core 2. Similarly, by making the contact surface area between the first end 401 of the armature 4 close to the movable spring portion 5 and one end of the iron core 2 smaller than the contact surface area between the second end 402 of the armature 4 remote from the movable spring portion 5 and the other end of the iron core 2, the magnetic force of the second end 402 of the armature 4 remote from the movable spring portion 5 (i.e., the normally closed side) is reduced, and further, the normally open side of the movable spring armature member is easily attracted.

[0034] The high-voltage electromagnetic relay of the present disclosure is similar to the prior art in all aspects not mentioned, or can be realized using the prior art.

[0035] The above embodiments are merely for the purpose of further illustrating the high-voltage electromagnetic relay of the present disclosure, and the present disclosure is not limited to the embodiments. Any simple modifications, equivalent changes, and modifications made to the above embodiments substantially based on the technology of the present disclosure are all included in the scope of protection of the technical solution of the present disclosure. [Explanation of symbols]

[0036] 1, base, 11, welding table, 12, bulkhead, 2, iron core, 3, fixed spring piece, 31, fixed contact, 32, fixed spring lead terminal, 4, armature, 41, groove, 42, intermediate region, 401, first end, 402, second end, 5, movable spring portion, 51, movable spring piece, 52, conductive piece, 53, movable contact, 6, plastic body, 7, welding piece structure, 71, welding piece, 72, connecting piece, 8, magnet steel, 9, coil lead terminal, 10, gap, X, length direction, Y, width direction, Z, vertical direction.

Claims

1. A high-voltage electromagnetic relay comprising a base portion and a movable spring armature member, wherein the base portion comprises a base, a coil provided on the base, an iron core, and at least one fixed spring portion, and pole faces at both ends of the iron core are exposed upward, and the movable spring armature member comprises at least one movable spring portion, an armature, magnet steel, and a plastic body that integrates the movable spring portion, the armature, and the magnet steel by injection molding, and the magnet steel is located below the armature, and a welded piece structure is provided in an intermediate portion of the movable spring armature member, and the movable spring armature member is attached to the base portion via the welded piece structure. the fixed spring portion cooperates with the movable spring portion, and the movable spring portion includes two movable spring pieces and a conductive piece, the two movable spring pieces being integrally formed with or electrically connected to the conductive pieces, the movable spring portion being located above the armature, and the two movable spring pieces being located above both sides of the armature in the width direction, the conductive piece straddling the armature, and the conductive piece and the two movable spring pieces being located on the same side of the welded piece structure in the vertical direction; A high voltage withstanding electromagnetic relay.

2. the conductive piece and the welding piece structure are independent of each other, and there is a gap between the conductive piece and the welding piece structure, and the gap is filled with a part of the plastic of the plastic body.

2. A high-voltage electromagnetic relay according to claim 1.

3. a recessed groove is provided in a portion of the armature below the conductive piece, and openings are provided at both ends of the recessed groove in the width direction of the armature, and a gap formed between the recessed groove and the conductive piece is filled with plastic from a portion of the plastic body; 2. A high-voltage electromagnetic relay according to claim 1.

4. the fixed spring portion includes two fixed spring pieces, the two fixed spring pieces being located below the two movable spring pieces, respectively, and the fixed contacts provided on the two fixed spring pieces being in one-to-one correspondence with the movable contacts provided on the two movable spring pieces, respectively, and the installation heights of the two fixed spring pieces are higher than the height of the pole faces of the iron core in the vertical direction, and the base provides a partition between the fixed spring pieces and the iron core; 2. A high-voltage electromagnetic relay according to claim 1.

5. the number of the movable spring portion and the number of the fixed spring portion are each one, constituting a normally open contact assembly or a normally closed contact assembly, the armature having a first end close to the movable spring portion and a second end remote from the movable spring portion, and a contact surface area between the first end of the armature and one end of the iron core is larger than a contact surface area between the second end of the armature and the other end of the iron core; 2. A high-voltage electromagnetic relay according to claim 1.

6. a bottom portion of the second end of the armature being partially flattened; 6. A high-voltage electromagnetic relay according to claim 5.

7. and by flattening both ends of a bottom of the second end of the armature in the width direction, only a middle region of the bottom of the second end of the armature comes into contact with the other end of the iron core.

7. A high-voltage electromagnetic relay according to claim 6.

8. the second end of the armature is shortened, so that a dimension of a contact surface between the first end of the armature and one end of the iron core in a predetermined direction is larger than a dimension of a contact surface between the second end of the armature and the other end of the iron core in a predetermined direction, the predetermined direction being the length direction of the armature; 6. A high-voltage electromagnetic relay according to claim 5.

9. the welding piece structure is located above the armature, and includes two welding pieces and one connecting piece, the two welding pieces are located above both sides in the width direction of a central part of the armature, the connecting piece straddles the armature and is integrally formed with the two welding pieces, two welding tables are provided on the top of the base, and the two welding pieces are welded and fixed corresponding to the two welding tables, respectively; 2. A high-voltage electromagnetic relay according to claim 1.

10. the conductive piece is completely enclosed in the plastic body, and the base integrates the coil, the iron core, the fixed spring portion, and the coil lead-out terminal by injection molding; 2. A high-voltage electromagnetic relay according to claim 1.

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