A high-voltage DC relay facilitating PCB connection

Abstract

The application discloses a high-voltage direct-current relay convenient for PCB connection. The relay is installed horizontally, and the bottom surface of the base is a PCB mounting surface; the load terminal, the coil lead-out end and the auxiliary terminal of the main circuit all pass through the bottom surface of the base to form mounting ends for PCB welding. The ceramic cover is arranged against an insulating table, the insulating table has two through holes for the static contact to pass through, and the through holes are filled with insulating reinforcing glue; a first insulating rib is arranged between the two through holes, when the first insulating rib is two ribs, a ring cavity is formed between the two ribs to arrange an auxiliary static contact, and the ring cavity can be filled with insulating glue; an auxiliary wiring gap is arranged on the side of the insulating table close to the base. The inner wall of the upper shell is provided with a second insulating rib staggered with the first insulating rib to increase the creepage distance. The lower end of the load terminal is cut into an upper-large-and-lower-small structure close to the side to increase the spacing, and a third insulating rib is arranged between the two load terminals on the bottom surface of the base. The application has compact structure, is convenient for direct welding of the PCB, and has excellent insulation and creepage performance.

Description

Technical Field

[0001] This invention relates to the field of relay technology, and more specifically to a high-voltage DC relay that is easy to connect to a PCB. Background Technology

[0002] High-voltage DC relays are key components in new energy vehicles, photovoltaic energy storage, and charging piles, primarily used for switching on and off high-voltage DC circuits. As terminal equipment becomes increasingly miniaturized and highly integrated, higher demands are being placed on the size, installation method, and assembly efficiency of relays.

[0003] Existing high-voltage DC relays, such as those in patent document CN119028768A, propose a compact design employing a direct-acting (solenoid-type) structure with a moving spring. This structure includes an electromagnetic assembly and a contact assembly consisting of two stationary contacts (i.e., the load leads), a moving spring portion, and a push rod assembly. The moving spring portion is bridge-type fitted between the two stationary contacts and mounted on top of the push rod assembly. The electromagnetic assembly drives the reciprocating motion of the push rod assembly, causing the moving spring portion to contact or separate from the stationary contacts, thus switching the load on and off.

[0004] However, with the increasing demands on the size, installation method, and integration of high-voltage DC relays from fields such as new energy vehicles and photovoltaic energy storage, the existing relay structure has the following shortcomings: Firstly, the installation and connection methods are limited, making direct soldering on the PCB board inconvenient. Most existing relays are vertically mounted, resulting in a large overall height, which is detrimental to the design of thinner devices. Furthermore, their load leads, coil leads, and auxiliary leads mostly use threaded connections or wire leads. Although some products have connectors, the assembly process is complex, making direct wave soldering or surface mounting on the printed circuit board (PCB) difficult, increasing assembly costs for end customers and easily causing contact resistance failures.

[0005] Secondly, the inter-electrode insulation structure has limitations, making it difficult to further increase the creepage distance. Under high-voltage conditions of 1000V and above, the inter-electrode insulation between the two stationary contacts is particularly critical. Existing insulation platforms or covers have simple structures, making it difficult to significantly increase the creepage distance within the limited space of the housing. In particular, the insulation isolation between the main stationary contacts and between the main stationary contacts and the auxiliary circuit is not thorough enough, making creepage breakdown prone to occur. Furthermore, the sealing and insulation reinforcement processes when the stationary contacts pass through the through-holes in the insulation platform lack corresponding structural guidance.

[0006] Third, the spacing between the lead-out terminals is fixed, and the layout of the auxiliary lead-out terminals and the internal structure is not compact enough. The load terminals of existing relays are usually strips of equal width that pass directly out side by side. This results in the spacing of the soldered ends at the lower end being limited by the installation space at the upper end, making it impossible to further increase the creepage distance and posing a short-circuit hazard. At the same time, the lead-out wires of the auxiliary contacts are messy inside, which can easily interfere with high-voltage components. They also lack dedicated wiring space, which is not conducive to high and low voltage isolation and overall miniaturization of the product.

[0007] Therefore, there is an urgent need to develop a high-voltage DC relay that retains the traditional direct-acting switching function of the moving reed, and can integrate the main circuit, coil and auxiliary circuit leads into a single PCB soldering system. At the same time, it can significantly improve the inter-electrode creepage distance by utilizing the cooperation of the internal insulating platform, upper shell and base reinforcing ribs, and optimize the auxiliary contact routing and terminal bottom creepage distance. Summary of the Invention

[0008] To overcome the aforementioned shortcomings of existing high-voltage DC relays, this invention provides a high-voltage DC relay that is easy to connect to a PCB.

[0009] The technical solution adopted in this invention is as follows: A high-voltage DC relay that facilitates PCB connection includes a base and a ceramic cover, an electromagnetic unit, and a direct-acting contact unit mounted on the base; the direct-acting contact unit includes two stationary contacts and a moving spring assembly and a push rod assembly assembled as one unit, the moving spring assembly being bridge-type fitted between the two stationary contacts; the bottom surface of the base is a mounting surface that contacts and engages with the PCB board, the electromagnetic unit and the direct-acting contact unit are horizontally mounted on the base; the direct-acting contact unit is disposed inside the ceramic cover, the two stationary contacts extend outward through the ceramic cover and are respectively fixed with load terminals, the two load terminals extend outward through the bottom surface of the base to form mounting ends for soldering to the PCB board; the coil lead-out end of the electromagnetic unit extends outward through the bottom surface of the base to form a mounting end for soldering to the PCB board.

[0010] Preferably, it further includes an insulating platform, the platform body of which is plate-shaped and is attached to the ceramic cover; the platform body is provided with two through holes, and the two stationary contacts are respectively inserted into the two through holes, and insulating and reinforcing adhesive is provided between the two through holes and the corresponding stationary contacts; the platform body is provided with at least one first insulating rib between the two through holes.

[0011] Preferably, an upper housing is mounted on the base, and the inner wall of the upper housing is provided with at least one second insulating rib; the second insulating rib is arranged between the two stationary contacts and intersects with the first insulating rib.

[0012] Preferably, the direct-acting contact unit further includes two auxiliary stationary contacts and an auxiliary moving spring. The auxiliary moving spring is bridge-type fitted between the two auxiliary stationary contacts and installed at the front end of the moving spring assembly. The two auxiliary stationary contacts extend outward through the ceramic cover and are electrically connected to auxiliary terminals respectively. The two auxiliary terminals extend out of the bottom surface of the base to form mounting ends for soldering to the PCB board.

[0013] Preferably, the first insulating rib is provided in two layers, and an annular cavity is formed between the two layers of the first insulating rib. The two auxiliary stationary contacts pass through the annular cavity and are provided with insulating and reinforcing adhesive within the annular cavity.

[0014] Preferably, the platform body has a notch on the side facing the base, and the notch serves as a wire passage hole for the wire between the auxiliary stationary contact and the auxiliary terminal.

[0015] Preferably, the platform body is provided with a boss at the through hole position, and the boss is provided with a chamfer along the circumference of the through hole.

[0016] Preferably, the two load terminals are plate-shaped structures, with their upper ends connected and fixed to the protruding sections of the two stationary contacts by bolts, and their lower ends are cut into a structure that is larger at the top and smaller at the bottom, and protrude from the bottom surface of the base to form a mounting end for soldering to the PCB board; or, the two load terminals and the two stationary contacts are fixed together by riveting.

[0017] Preferably, the lower surface of the base is provided with at least one third insulating rib between the two load terminals.

[0018] Preferably, the upper surface of the base is provided with at least one fourth insulating rib, which is arranged between the two stationary contacts and intersects with the first insulating rib.

[0019] The present invention has the following beneficial effects: 1. PCB Board Soldering and Mounting: The relay adopts a horizontal mounting structure, with the bottom surface of the base serving as the mounting surface for the PCB board. The load terminals of the main circuit, the coil leads of the electromagnetic unit, and the auxiliary terminals all protrude from the bottom surface of the base, forming mounting ends for soldering to the PCB board. This structure reduces the overall height of the relay on the PCB board, facilitating direct soldering and assembly, reducing the need for external connectors or wire connections, and simplifying the assembly process.

[0020] 2. Optimized Insulation Platform Structure: A plate-shaped insulation platform is installed against the ceramic cover, with the stationary contact passing through a through-hole in the insulation platform. Insulating and reinforcing adhesive is applied between the through-hole and the stationary contact, effectively enhancing the sealing and insulation fixation between the stationary contact and the insulation platform. A boss and a chamfer along the circumference of the through-hole are provided at the through-hole location. This structure provides clear space for the dispensing process, allowing the insulating and reinforcing adhesive to fill more smoothly along the chamfer, improving assembly consistency and ensuring the long-term reliability and sealing of the insulation platform area.

[0021] 3. Interlaced Insulating Rib Layout: An upper housing is mounted on the base, and a second insulating rib is provided on the inner wall of the upper housing. This second insulating rib is arranged between the two stationary contacts and interlaces with the first insulating rib on the insulating platform. Simultaneously, a fourth insulating rib is also provided on the upper surface of the base, similarly arranged between the two stationary contacts and interlacing with the first insulating rib. This multi-layered, spatially interlaced structure extends the creepage distance between adjacent stationary contacts within the limited space of the housing, helping to reduce the risk of creepage breakdown under high-voltage environments and significantly improving the insulation performance between the relay's main circuits.

[0022] 4. Reasonable Auxiliary Contact Layout: The auxiliary contacts are integrated into the front end of the moving spring assembly. The auxiliary stationary contact passes through the ceramic cover and is led out to the bottom surface of the base through the auxiliary terminal, meeting the requirements of overall PCB soldering. Two first insulating ribs on the insulating platform form an annular cavity, within which the two auxiliary stationary contacts are located. Insulating reinforcing adhesive is placed within the annular cavity to physically isolate the auxiliary circuit from the main circuit. Simultaneously, a notch is provided on the side of the platform body facing the base, serving as a through hole for wiring between the auxiliary stationary contacts and the auxiliary terminal, making the internal wiring path compact and orderly, and reducing interference between high and low voltage wires within the housing.

[0023] 5. Terminal Bottom Cutting Design: The load terminals adopt a plate-like structure, with the upper end fixed to the stationary contact protrusion section. The lower end, on the adjacent side, is cut off, forming a structure that is larger at the top and smaller at the bottom. This cutting treatment effectively increases the physical distance between the lower ends of the two load terminals while maintaining the same upper connection size, thereby increasing the creepage distance of the lower end of the load terminals on the PCB board and reducing the risk of short circuits between adjacent soldered terminals.

[0024] 6. Reinforced Insulation at the Bottom of the Base: A third insulating rib is provided on the lower surface of the base between the two load terminals, which further increases the creepage distance in the area where the load terminals protrude from the bottom surface of the base. The height of this third insulating rib protruding from the lower surface of the base is limited to less than half the exposed length of the lower end of the load terminal. This size setting ensures that the insulating rib, while increasing the creepage distance, will not physically interfere with the PCB board, thus balancing high-voltage insulation performance and adaptability to conventional PCB mounting. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the overall structure from another angle of an embodiment of the present invention (the upper shell is hidden).

[0027] Figure 3 This is an assembly diagram of an embodiment of the present invention.

[0028] Figure 4 This is a three-dimensional schematic diagram of the insulating platform in an embodiment of the present invention.

[0029] Figure 5 This is a front view schematic diagram of the insulating platform in an embodiment of the present invention.

[0030] Figure 6 This is a schematic diagram of the upper shell in an embodiment of the present invention.

[0031] Figure 7 This is an assembly diagram of the direct-acting contact unit in an embodiment of the present invention (the stationary contact and auxiliary stationary contact are hidden).

[0032] Figure 8 This is a schematic diagram of the overall structure of another embodiment of the present invention (the upper shell is hidden).

[0033] 1-Base, 1.1-Third insulating rib, 1.2-Fourth insulating rib; 2-Ceramic cover; 3-Electromagnetic unit, 3.1-Coil lead-out terminal; 4-Direct-acting contact unit, 4.1-Stationary contact, 4.2-Moving spring assembly, 4.3-Push rod assembly, 4.4-Auxiliary stationary contact, 4.5-Auxiliary moving spring, 4.6-Gate frame, 4.7-Clamping plate, 4.8-Moving spring, 4.9-Contact spring, 4.10-Push plate, 4.11-Auxiliary seat, 4.12-Ear plate, 4.13-Clamping post; 5-Load terminal; 6-Insulating platform, 6.1-Platform body, 6.2-Through hole, 6.3-First insulating rib, 6.4-Annular cavity, 6.5-Notch, 6.6-Boss, 6.7-Chamfer; 7-Upper shell, 7.1-Second insulating rib; 8-Auxiliary terminal. Detailed Implementation

[0034] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0035] like Figures 1 to 7As shown, this embodiment provides a high-voltage DC relay that is easy to connect to a PCB. The overall assembly base is a base 1. A ceramic cover 2, an electromagnetic unit 3, and a direct-acting contact unit 4 are all mounted on the base 1. The direct-acting contact unit 4 adopts a moving spring direct-acting structure, including two stationary contacts 4.1, a moving spring assembly 4.2, and a push rod assembly 4.3. The moving spring assembly 4.2 is fitted between the two stationary contacts 4.1 in a bridge structure and is mounted on top of the push rod assembly 4.3. When the electromagnetic unit 3 is energized, it drives the push rod assembly 4.3 to perform a reciprocating linear motion, causing the moving spring assembly 4.2 to contact or separate from the two stationary contacts 4.1, thus realizing the circuit's conduction and disconnection. To adapt to the onboard mounting requirements of the PCB, the bottom surface of the base 1 directly serves as the mounting surface for contact with the PCB. Both the electromagnetic unit 3 and the direct-acting contact unit 4 are mounted horizontally on the base 1. The direct-acting contact unit 4 is housed within a ceramic cover 2, which is filled with hydrogen gas for arc extinguishing and insulation. Two stationary contacts 4.1 extend forward through the ceramic cover 2, with load terminals 5 fixed at their exit points. These load terminals 5 extend downwards through the bottom surface of the base 1, forming mounting terminals for soldering to the PCB board. Simultaneously, the coil lead-out end 3.1 of the electromagnetic unit 3 also extends from the bottom surface of the base 1, forming a soldering mounting end. By bringing the leads of the main circuit load and control circuit coil flush with the bottom surface of the base 1, the overall assembly height of the relay is effectively reduced, allowing direct wave soldering or surface mounting to the PCB board, thus reducing the need for external wires and connectors.

[0036] like Figures 2 to 5 As shown, to optimize the internal insulation structure, this embodiment also includes an insulating platform 6. The main body of the insulating platform 6 is a plate-shaped platform body 6.1, which is attached to the front end of the ceramic cover 2. Two through holes 6.2 are machined on the platform body 6.1, and two stationary contacts 4.1 are respectively inserted into the corresponding through holes 6.2. To enhance the sealing and insulation of the stationary contacts 4.1 when passing through the insulating platform 6, insulating reinforcing adhesive is filled between the two through holes 6.2 and the corresponding stationary contacts 4.1 to achieve sealing and insulating fixation. At the same time, in the area of ​​the platform body 6.1 located between the two through holes 6.2, at least one forward-protruding first insulating rib 6.3 is provided. This first insulating rib 6.3 physically blocks the possible creepage path between the two stationary contacts 4.1 along the surface of the insulating platform.

[0037] like Figure 3 and Figure 6As shown, an upper housing 7, covering the ceramic cover 2, is also installed on the base 1. The inner wall of the upper housing 7 is provided with at least one second insulating rib 7.1. The second insulating rib 7.1 is specifically positioned between the two stationary contacts 4.1, and forms an interlocking relationship with the first insulating rib 6.3 on the insulating platform 6. Through the interlocking of the first insulating rib 6.3 and the second insulating rib 7.1, the physical path length along the surface of the insulating medium between the two stationary contacts 4.1, i.e., the creepage distance, can be effectively increased, thereby reducing the risk of inter-electrode creepage breakdown of the relay under high voltage and high current conditions.

[0038] like Figure 2 and Figure 3 As shown, at least one fourth insulating rib 7.2 is provided on the upper surface of the base 1 between the two stationary contacts 4.1. This fourth insulating rib 7.2 protrudes upwards from the upper surface of the base 1, and its arrangement forms a staggered relationship with the first insulating rib 6.3 on the insulating platform 6. The fourth insulating rib 7.2 can work together with the second insulating rib 7.1 on the inner wall of the upper housing 7 to form multiple staggered baffles with the first insulating rib 6.3 from both the base side and the upper housing side, further extending the physical path length along the surface of the insulating medium between the stationary contacts 4.1, i.e., the creepage distance. This structure, without significantly increasing the overall size of the relay, fully utilizes the narrow gap between the base and the insulating platform, achieving an additional improvement in inter-electrode insulation performance, and is particularly suitable for high-voltage applications of 1000V and above with more stringent insulation requirements.

[0039] like Figure 2 , Figure 3 and Figure 7As shown, the main structure of the moving spring assembly 4.2 includes a portal frame 4.6 composed of an end plate and two side plates, an integral push plate 4.10 and a retaining plate 4.7, a bridge-shaped moving spring 4.8, and a contact spring 4.9. The front ends of the two side plates have openings, into which the two ends of the retaining plate 4.7 are respectively inserted. The push plate 4.10 is fixed to the front end of the push rod of the push rod assembly 4.3, and the retaining plate 4.7 and the push plate 4.10 are integrally formed. The contact spring 4.9 is elastically supported between the push plate 4.10 and the moving spring 4.8, and its elastic force causes the moving spring 4.8 to approach the inner wall of the end plate of the portal frame 4.6. The two ends of the moving spring 4.8 extend from the portal frame 4.6 for contacting or separating from the two stationary contacts 4.1. To further expand the relay function, the direct-acting contact unit 4 also integrates auxiliary contacts. The auxiliary moving spring 4.5 and the auxiliary seat 4.11 are integrally molded using injection molding. The two ends of the auxiliary moving spring 4.5 curve outwards, respectively for contacting or separating from the two auxiliary stationary contacts 4.4. The end plate of the portal frame 4.6 has upper and lower ear plates 4.12. The back of the auxiliary seat 4.11 has four locking posts 4.13. The two upper locking posts have locking slots on opposite sides for engaging with the upper ear plate 4.12; the two lower locking posts also have locking slots for engaging with the lower ear plate 4.12, thus achieving a stable assembly of the auxiliary seat 4.11 and the portal frame 4.6. The two auxiliary stationary contacts 4.4 extend outwards through the ceramic cover 2 and are electrically connected to auxiliary terminals 8. The two auxiliary terminals 8 also extend through the bottom surface of the base 1, forming mounting ends for easy soldering to the PCB board. The push rod assembly 4.3 adopts a conventional direct-acting push rod structure. By placing the auxiliary lead-out terminal and the main circuit lead-out terminal on the same side and adopting a unified horizontal welding lead-out structure, the modular, miniaturized, and highly integrated PCB board installation requirements of high-voltage DC relays are met.

[0040] like Figures 2 to 5 As shown, the insulating platform 6 preferably has two first insulating ribs 6.3. The two first insulating ribs 6.3 together enclose a closed or semi-closed annular cavity 6.4 in the middle area of ​​the platform body 6.4. The aforementioned auxiliary stationary contact 4.4 protrudes from the central area of ​​the annular cavity 6.4 and is filled with insulating reinforcing adhesive within the area of ​​the annular cavity 6.4. The annular cavity 6.4 provides a physical space for the insulating reinforcing adhesive, allowing the root of the auxiliary stationary contact 4.4 to be fully wrapped by the insulating adhesive, thereby forming a reliable insulating isolation band between it and the high-voltage main circuit stationary contact 4.1, reducing the probability of interference or insulation failure between the low-voltage, high-current auxiliary circuit and the high-voltage main circuit.

[0041] like Figure 5As shown, to facilitate the routing of internal leads, a notch 6.5 is provided on the side of the platform body 6.1 facing the base 1, i.e., the lower side of the platform body 6.1. The function of this notch 6.5 is to serve as a through-hole for the wire connecting the auxiliary stationary contact 4.4 and the auxiliary terminal 8. Through the guiding and converging effect of this notch 6.5, the auxiliary wires can extend along an orderly path inside the housing to the base 1 below and connect with the auxiliary terminal 8, preventing high and low voltage wires from tangling or causing unnecessary interference within the housing, thus ensuring the neatness of the internal assembly.

[0042] like Figure 4 and Figure 5 As shown, the platform body 6.1 has locally thickened bosses 6.6 at the specific opening positions of the two through holes 6.2. These bosses 6.6 are further machined with smooth chamfers 6.7 along the circumferential edge of the through holes 6.2. The bosses 6.6 effectively increase the contact thickness between the stationary contact 4.1 and the insulating platform 6, while the chamfer 6.7 guides the flow direction of the insulating reinforcing adhesive and acts as an adhesive reservoir. During the dispensing process, the insulating adhesive can flow smoothly along the beveled surface of the chamfer 6.7 into the gap between the through hole 6.2 and the stationary contact 4.1, achieving more uniform filling and sealing, thereby improving the assembly efficiency of the dispensing process and the consistency of the finished product.

[0043] like Figures 1 to 3 As shown, the load terminal 5 is formed from a plate-shaped metal material of a certain thickness. The upper end of the load terminal 5 is fixed to the protruding section of the stationary contact 4.1 by a mechanical connection. Specifically, the upper end of the load terminal 5 passes through the threaded section of the stationary contact 4.1 and is then tightened with a nut, i.e., fixed by bolt connection, which facilitates disassembly and subsequent maintenance. The lower end of the load terminal 5 protrudes from the bottom surface of the base 1 to form a soldering end. In order to increase the creepage distance of the lower ends of the two load terminals 5 on the PCB board, the side of the lower ends of the two load terminals 5 that is close to each other is cut off, so that it presents a structure that is wider at the top and narrower at the bottom. Through this cutting treatment, without changing the connection space and size above the stationary contact 4.1, the physical distance between the two soldering ends on the PCB board is effectively increased, reducing the risk of short circuits caused by the small spacing between adjacent solder pads.

[0044] like Figure 1 As shown, to further improve the insulation capability of the lower surface of the base 1, at least one third insulating rib 1.1 is provided on the lower surface of the base 1 between the two load terminals 5. Since conductive dust is easily retained in the root area of ​​the load terminal 5 after it passes through the lower surface of the base 1, or the insulation performance may decrease in a humid environment, the addition of the third insulating rib 1.1 can act as a physical barrier to isolate the base surface path between the two load terminals 5, thereby further increasing the creepage distance of the load terminal 5 in the area where it passes through the bottom surface of the base 1.

[0045] like Figure 1 As shown, to balance insulation performance and PCB mounting feasibility, the dimensions of the third insulating rib 1.1 are limited. The height of the third insulating rib 1.1 protruding from the lower surface of the base 1 is configured to be less than half the length of the lower end of the load terminal 5 protruding from the lower surface of the base 1. According to this parameter configuration, the third insulating rib 1.1 can provide an effective creepage distance on the lower surface of the base 1. At the same time, because its protrusion length below the base 1 is strictly limited, it will not occupy too much soldering installation space at the lower end of the load terminal 5. Therefore, when the relay is assembled on the PCB board, the third insulating rib 1.1 will not physically interfere with the PCB board surface, thus ensuring both high-voltage insulation performance and smooth conventional PCB mounting.

[0046] like Figure 8 As shown, in another embodiment, the upper end of the load terminal 5 is fixed to the protruding section of the stationary contact 4.1 by riveting. Riveting has the characteristics of stable connection, no loosening and suitability for mass production.

[0047] Obviously, the above embodiments of the present invention are merely illustrative examples to illustrate the invention and are not intended to limit the implementation of the invention. Other obvious variations or modifications derived from the essential spirit of the invention still fall within the protection scope of the invention.

Claims

1. A high-voltage DC relay that is easy to connect to a PCB, comprising a base (1) and a ceramic cover (2), an electromagnetic unit (3) and a direct-acting contact unit (4) mounted on the base. The direct-acting contact unit (4) includes two stationary contacts (4.1), a movable spring assembly (4.2) and a push rod assembly (4.3) assembled together. The movable spring assembly (4.2) is bridge-type fitted between the two stationary contacts (4.1). Its features are, The bottom surface of the base (1) is a mounting surface that contacts and cooperates with the PCB board. The electromagnetic unit (3) and the direct-acting contact unit (4) are mounted horizontally on the base (1). The direct-acting contact unit (4) is disposed inside the ceramic cover (2). The two stationary contacts (4.1) extend outward through the ceramic cover (2) and are respectively fixed with load terminals (5). The two load terminals (5) extend out of the bottom surface of the base (1) to form mounting ends for soldering to the PCB board. The coil lead-out end (3.1) of the electromagnetic unit (3) extends through the bottom surface of the base (1) to form a mounting end for soldering to the PCB board.

2. The high-voltage DC relay for easy PCB connection according to claim 1, characterized in that, It also includes an insulating platform (6), the platform body (6.1) of which is plate-shaped and is attached to the ceramic cover (2); The platform body (6.1) is provided with two through holes (6.2), and the two stationary contacts (4.1) are respectively inserted into the two through holes (6.2). Insulating and reinforcing adhesive is provided between the two through holes (6.2) and the corresponding stationary contacts (4.1). The platform body (6.1) has at least one first insulating rib (6.3) between the two through holes (6.2).

3. A high-voltage DC relay for easy PCB connection according to claim 2, characterized in that, An upper housing (7) is installed on the base (1), and at least one second insulating rib (7.1) is provided on the inner wall of the upper housing (7); the second insulating rib (7.1) is arranged between the two stationary contacts (4.1) and intersects with the first insulating rib (6.3).

4. A high-voltage DC relay for easy PCB connection according to claim 2, characterized in that, The direct-acting contact unit (4) further includes two auxiliary stationary contacts (4.4) and an auxiliary moving spring (4.5). The auxiliary moving spring (4.5) is bridge-type engaged between the two auxiliary stationary contacts (4.4) and installed at the front end of the moving spring assembly (4.2). The two auxiliary stationary contacts (4.4) extend outward through the ceramic cover (2) and are electrically connected to auxiliary terminals (8) respectively. The two auxiliary terminals (8) extend out of the bottom surface of the base (1) to form mounting ends for soldering to the PCB board.

5. A high-voltage DC relay for easy PCB connection according to claim 4, characterized in that, The first insulating rib (6.3) is provided in two rows, and an annular cavity (6.4) is formed between the two rows of the first insulating rib (6.3). The two auxiliary stationary contacts (4.4) pass through the annular cavity (6.4) and are provided with insulating and reinforcing adhesive within the annular cavity (6.4).

6. A high-voltage DC relay for easy PCB connection according to claim 5, characterized in that, The platform body (6.1) has a notch (6.5) on the side facing the base (1), and the notch (6.5) serves as a wire passage hole between the auxiliary stationary contact (4.4) and the auxiliary terminal (8).

7. A high-voltage DC relay for easy PCB connection according to claim 2, characterized in that, The platform body (6.1) has a boss (6.6) at the through hole (6.2) and the boss (6.6) has a chamfer (6.7) along the circumference of the through hole (6.2).

8. A high-voltage DC relay for easy PCB connection according to claim 1, characterized in that, The two load terminals (5) are plate-shaped structures, with their upper ends fixed to the protruding sections of the two stationary contacts (4.1) by bolts. Their lower ends, on the side closest to each other, are cut into a structure that is larger at the top and smaller at the bottom, and protrude through the bottom surface of the base (1) to form mounting ends for soldering to the PCB board; or, The two load terminals (5) are fixed to the two stationary contacts (4.1) by riveting.

9. A high-voltage DC relay for easy PCB connection according to claim 8, characterized in that, The lower surface of the base (1) is provided with at least one third insulating rib (1.1) between the two load terminals (5).

10. A high-voltage DC relay for easy PCB connection according to claim 2, characterized in that, The upper surface of the base (1) is provided with at least one fourth insulating rib (7.2), which is arranged between the two stationary contacts (4.1) and intersects with the first insulating rib (6.3).

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