A high-voltage resistant micro-miniature board-to-board electrical connector based on polyimide material

Abstract

The present invention relates to the field of inter-board high-voltage electrical connectors, and in particular to a high-voltage resistant micro-miniature inter-board electrical connector based on polyimide material. The electrical connector of the present invention comprises: a plug structure and a socket structure. The plug structure comprises a plug base and a pin; the inside of the plug base is slotted according to the shape of the pin, the pin is embedded in the plug base by impact, and the plug base and the pin are fixed by glue filling and bonding through glue filling holes; the socket structure comprises a socket base, a plug tube, and a plug tube protective tube assembly, and the inside of the socket base is slotted according to the shape of the plug tube and the plug tube protective tube assembly after assembly; the side walls of the plug base and the socket base are designed with at least two vent holes, two glue filling holes and two screw mounting holes, the plug tube and the plug tube protective tube assembly are assembled by screwing, and after the plug tube and the plug tube protective tube assembly are assembled, they are embedded in the socket base by impact, and the three are fixed by glue filling and bonding through glue filling holes.

Description

Technical Field

[0001] The present invention relates to the fields of aerospace electrical connectors, inter-board high-voltage electrical connectors, and high-voltage connectors, and in particular to a high-voltage-resistant miniature inter-board electrical connector based on polyimide material. Background Art

[0002] Space probe designs are complex and require compartmentalization based on instrument functional modules. These components are typically divided into sensor and electronics enclosures. Multiple printed circuit boards (PCBs) are typically installed in separate locations within the electronics enclosure. This modular, spatially isolated design reduces noise interference and signal coupling between PCBs, effectively improving probe performance. However, signal exchange between PCBs and between the electronics and sensors is required, and this signal transmission typically utilizes inter-board electrical connectors. To prevent electromagnetic interference with other probes on the satellite platform, the electronics and sensors are typically integrated into a single enclosure, typically mounted in separate locations within the same housing. The enclosure is typically made of a sealed metal such as magnesium or aluminum. This enclosure effectively shields the probe's internal signals from external sources, so all internal signals from the electronics and sensors must be routed or wired within the enclosure. Signals between boards and between sensors and electronics typically utilize internal electrical connectors or more traditional wired connections.

[0003] There are many types of space environment detectors, each with varying requirements for electrical connectors. Key space environment detectors, such as low-energy particle detectors, optical detectors, X-ray detectors, and high-energy particle detectors, all require electronics to provide high-voltage power to their sensors. The voltage amplitude can reach tens of thousands of volts, and the scientific data generated by the sensors are analog signals. Therefore, the electronics boxes for these detectors all include a high-voltage circuit module and a scientific data acquisition module. High voltage is prone to discharge, which can easily cause sensor malfunction and potentially damage the instrument. Furthermore, the scientific data generated by these sensors is analog, with low amplitudes, making it susceptible to interference from high-voltage signals, which can lead to abnormal detection data. Therefore, high-voltage transmission is particularly important in the design of these detectors.

[0004] Lightweight and miniaturized design has been a major trend in space probe development in recent years. Therefore, miniaturization and light weight have become key considerations when selecting electrical connectors for space probes. Furthermore, the harsh operating environment of space probes places stringent demands on connectors for high and low temperature resistance, as well as vacuum resistance. For space environment detectors such as the aforementioned low-energy particle detectors, optical detectors, X-ray detectors, and high-energy particle detectors, inter-board electrical connectors must not only withstand high and low temperatures, vacuum environments, but also high voltages.

[0005] Currently, there are no lightweight, compact electrical connectors on the market that can withstand high voltages exceeding 10,000 volts. Therefore, the high-voltage transmission of space environment detectors, such as low-energy particle detectors, optical detectors, X-ray detectors, and high-energy particle detectors, is achieved through traditional high-voltage wire welding. During the initial stages of instrument design, detectors undergo numerous sensor and electronics assembly and separation tests. Each assembly and disassembly requires soldering and desoldering of high-voltage solder joints. Repeated soldering can easily cause printed circuit board pads to fall off, and soldering and desoldering also complicates instrument assembly and disassembly. Summary of the Invention

[0006] To address the current problem of internal high-voltage transmission in detectors, this invention proposes a small, lightweight (8g) aerospace inter-board electrical connector capable of withstanding high voltages exceeding 10kV. This connector can effectively prevent high-voltage transmission from interfering with other analog circuits or damaging the instrument through high-voltage discharges due to improper welding. Furthermore, it reduces the complexity of assembly and disassembly of the detector's electronics box and sensors, significantly reduces the risk of pad detachment due to repeated welding, improves the safety and reliability of the detector, and expands the application area of ​​internal high-voltage electrical connectors.

[0007] The present invention proposes a high-voltage resistant micro-miniature board-to-board electrical connector based on polyimide material.

[0008] The electrical connector comprises: a plug base (8), a pin (9), a socket base (6) and a plug tube (14);

[0009] The plug base (8) and the socket base (6) are both integrally processed from polyimide material;

[0010] The main body materials of the insertion pin (9) and the insertion tube (14) are both metal, and a layer of polyimide material is wrapped around the outside of the main body material;

[0011] The plug base (8) is provided with a pin through hole (8-0), and the pin (9) is arranged in the pin through hole (8-0) and is installed on the plug base (8);

[0012] The socket base (6) is provided with a pipe through hole (6-0), the pipe (14) is arranged in the pipe through hole (6-0), and is installed on the socket base (6);

[0013] The diameters of the pin through hole (8-0) and the tube through hole (6-0) are both irregularly designed to form annular concave-convex grooves that match the shapes of the pin (9) and the tube (14) respectively;

[0014] The inner end portion of the plug pin (10) and the inner end portion of the insert tube (12) are connected in pairs to form the electrical connector; the outer end portion of the plug pin and the outer end portion of the insert tube are respectively used for external circuit connection.

[0015] As an improvement of the above technical solution, the plug pin (9) comprises in sequence: an inner plug pin end portion (10), an intermediate plug pin portion (15) and an outer plug pin end portion;

[0016] The cannula (14) comprises, in sequence: an inner cannula end portion (12), a middle cannula portion (16) and an outer cannula end portion;

[0017] The inner end portion (10) of the insertion pin is a solid cylinder; the inner end portion (12) of the insertion tube is a hollow cylinder with grooves on both sides; the inner end portion (10) of the insertion pin and the inner end portion (12) of the insertion tube are butted together in pairs;

[0018] The grooves on both sides of the inner end portion (12) of the insert tube are used to prevent gas from remaining inside the electrical connector after the inner end portion (10) of the insert pin and the inner end portion (12) of the insert tube are connected;

[0019] The middle portion (15) of the plug pin is used to fix the plug pin (9) in the plug base (8); after the plug pin (9) is installed in the plug base (8), a gap that is consistent with the wall thickness of the plug tube (14) is left between the inner end portion (10) of the plug pin and the plug base (8), so that the plug pin (9) and the plug tube (14) can be plugged in.

[0020] The insert tube intermediate portion (16) is used to fix the insert tube (14) in the socket base (6).

[0021] As an improvement to the above technical solution, the outer end of the pin is a pin solder cup (11); the outer end of the cannula is a cannula solder cup (17);

[0022] The pin soldering cup (11) and the tube soldering cup (17) are respectively used for external circuits.

[0023] As an improvement of the above technical solution, the cannula (14) further includes a cannula assembly protective tube (13);

[0024] The cannula assembly protective tube (13) is a hollow cylinder, which is screwed and fixed to the outside of the cannula butt end (12) by screwing, and is used for sealing and protecting the cannula butt end (12).

[0025] As an improvement to the above technical solution, the middle portion (15) of the pin includes: a pin clamp (15-1) and a pin glue injection position (15-2); the outer perimeter of the pin clamp (15-1) is greater than the outer perimeter of the pin glue injection position (15-2);

[0026] The cannula middle part (16) includes: a cannula clamp (16-1) and a cannula glue injection position (16-2); the outer perimeter of the cannula clamp (16-1) is greater than the outer perimeter of the cannula glue injection position (16-2);

[0027] The pin clamp (15-1) is used to fasten the pin (9) to a corresponding position in the pin through hole (8-0) when the pin (9) is inserted into the plug base (8) by impact; the pin glue injection position (15-2) is used to inject glue after the pin (9) is inserted into the corresponding position, so as to bond the pin (9) and the plug base (8);

[0028] The insert tube clamp (16-1) is used to fasten the insert tube (14) to a corresponding position in the insert tube through hole (6-0) when the insert tube (14) is inserted into the socket base (6) by impact; the insert tube glue injection position (16-2) is used to inject glue after the insert tube (4) is inserted into the corresponding position, so as to bond the insert tube (14) and the socket base (6).

[0029] As an improvement of the above technical solution, the side wall of the socket base (6) and the side wall of the plug base (8) are both provided with a glue injection hole (4) and an air release hole (5);

[0030] The glue injection hole (4) on the side wall of the socket base (6) is used for injecting glue after the insert tube (14) is inserted into the socket base (6) by impact, so that the insert tube glue injection position (16-2) is tightly bonded to the socket base (6);

[0031] The glue injection hole (4) on the side wall of the plug base (8) is used for injecting glue after the plug pin (9) is embedded in the plug base (8) by impact, so that the plug pin injection position (15-2) is tightly bonded to the plug base (8);

[0032] The vent hole (5) is used to exhaust gas during glue filling and socket plug docking to prevent gas residue.

[0033] As an improvement to the above technical solution, the plug pin (9) is embedded into the plug base (8) by impact and then glue is poured to form the plug structure (1);

[0034] The insert (14) is embedded in the socket base (6) by impact and then glued to form a socket structure (2);

[0035] The connection mode between the plug structure (1) and the socket structure (2) is crimping and locking.

[0036] As an improvement of the above technical solution, the electrical connector further includes a mounting screw (3) made of polyimide;

[0037] The mounting screws (3) are used to fix the connected plug structure (1) and socket structure (2) at a set position.

[0038] As an improvement of the above technical solution, the plug base (8) comprises: a first plug base structure (8-1), a second plug base structure (8-2) and a third plug base structure (8-3);

[0039] The first structure (8-1) of the plug base is a cylindrical body with a through hole, which is the result of cutting off the two sides of the cylindrical body in parallel along the height direction of the cylindrical body. This allows for screw installation space and can make the connector smaller and lighter.

[0040] The second plug base structure (8-2) is a cylindrical body with a through hole formed by cutting off the two sides of the cylinder in parallel along the height direction of the cylinder, which can make the connector smaller and lighter. The cross-sectional area of ​​the second plug base structure (8-2) is larger than that of the first plug base structure (8-1), and at least one screw mounting hole (7) is formed on each side.

[0041] The third structure (8-3) of the plug base is a column with a through hole and a rounded rectangular cross section;

[0042] The through holes of the plug base first structure (8-1), the plug base second structure (8-2) and the plug base third structure (8-3) are connected to form a pin through hole (8-0); at least two pin through holes (8-0) are provided;

[0043] When the plug pin (9) is installed in the plug base (8), the third structure (8-1) of the plug base corresponds to the direction of the inner end portion (10) of the plug pin, and the third structure (8-3) of the plug base corresponds to the direction of the pin solder cup (11).

[0044] As an improvement of the above technical solution, the socket base (6) comprises: a first socket base structure (6-1), a second socket base structure (6-2) and a third socket base structure (6-3);

[0045] The first structure (6-1) of the socket base is a hollow cylinder surrounding the insertion tube through hole (6-0);

[0046] The second structure (6-2) of the socket base is a cylinder with a through hole, and at least one screw mounting hole (7) is respectively opened on both sides of the cylinder;

[0047] The third structure (6-3) of the socket base is a column with a through hole and a rounded rectangular cross section. The hollow cylindrical portion of the first structure (6-1) of the socket base, the through hole of the second structure (6-2) of the socket base, and the through hole of the third structure (6-3) of the socket base are connected to form an inserting through hole (6-0); at least two inserting through holes (6-0) are provided.

[0048] After the pins (9) and the insert tubes (14) are connected in pairs, the distance between the two groups meets the high-voltage safety distance requirement; the high-voltage safety distance requirement is: when the distance is 1 mm, the high voltage between the two reaches 3000V to 4000V;

[0049] When the insert tube (14) is installed in the socket base (6), the first structure (6-1) of the socket base corresponds to the direction of the insert tube (14) docking end (12), and the third structure (6-3) of the socket base corresponds to the direction of the insert tube welding cup (17).

[0050] Advantages of the electrical connector of the present invention:

[0051] 1. The present invention designs an inter-board electrical connector that can withstand high voltages better than 10kV, realizing high voltage transmission inside the instrument;

[0052] 2. This invention uses polyimide (YS20) as the base of the electrical connector, effectively increasing the withstand voltage of the contacts and reducing their weight. This material has been used in multiple satellites in orbit and demonstrates excellent insulation properties. Polyimide is a new type of high-insulation material with high hardness and brittleness, making it difficult to process and expensive. Currently, few electrical connectors on the market use polyimide as the base.

[0053] 3. The present invention proposes a special structure (concave and convex grooves, vent holes, etc.) design to increase the pressure resistance parameters of the electrical connector;

[0054] 4. The purpose of the present invention is to solve the technical problem of high-voltage transmission within a detector. The present invention uses a high-insulation, low-density polyimide material as the insulator base of the electrical connector, effectively improving the withstand voltage of the electrical connector while reducing its weight and volume, thereby facilitating a lightweight and miniaturized design of the detector.

[0055] 5. The present invention effectively improves the withstand voltage of the electrical connector through structural design and material selection, greatly reducing the complexity of disassembly and assembly of the detector electronics box and sensor, and reducing the risk of multiple soldering pads on the electronics box falling off and the risk of high-voltage transmission interfering with other analog circuits. It has a wide range of applications in the field of inter-board connectors, especially in the field of high-voltage transmission within space environment detectors.

[0056] 6. To improve the withstand voltage of the electrical connector, the present invention utilizes a polyimide base to isolate the two plugs at the socket end and the two pins at the plug end, ensuring that the dielectric between the two cores is polyimide, a high-dielectric-constant material. The solder cup ends of the pins and plugs are designed so that the polyimide base is higher than the solder cup, and the butt end of the plug is designed so that the polyimide base fits tightly against the plug, improving the dielectric constant between the two cores. An annular recess is designed on the outer edge of the pin through-hole at the pin butt end to increase creepage distance. This design effectively improves the withstand voltage between the two cores while reducing the size.

[0057] 7. The present invention features vent holes at the mating ends of the electrical connectors and slots at the mating ends of the intubation tubes to allow for sufficient air release after the connectors are mated. This prevents residual gas inside the connectors after docking, which could cause low-pressure discharge of the transmitted high-voltage signal relative to the air. The present invention utilizes vacuum-cooled glue pouring, and glue pouring is performed in a vacuum environment to prevent residual gas from forming inside the glue pouring process. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] FIG1 is a diagram illustrating a connection between a high-voltage-resistant micro-sized board-to-board electrical connector based on a polyimide material according to the present invention;

[0059] Figure 2(a) is a schematic diagram of the plug pin, Figures 2(b) and 2(c) are schematic diagrams of the plug base at two different angles, and Figures 2(d) and 2(e) are side and front views of the plug structure along a cross section, respectively.

[0060] FIG3( a ) is a schematic diagram of the cannula, FIG3( b ) is a schematic diagram of the socket base, and FIG3( c ) and FIG3( d ) are side and front views of the socket structure along a cross section, respectively;

[0061] Figure 4 Installation diagram for socket and printed circuit board;

[0062] Figure 5 is a diagram of the mounting holes for the plug and the metal boss on the sensor end;

[0063] Figure 6 is a diagram of the internal docking installation of the detector.

[0064] Figure ID

[0065] 1. Plug structure 2. Socket structure 3. Mounting screws

[0066] 4. Glue filling hole 5. Air release hole 6. Socket base

[0067] 6-0, inserting tube through hole 6-1, socket base first structure 6-2, socket base second structure

[0068] 6-3. Socket base third structure 7. Screw mounting hole 8. Plug base

[0069] 8-0, pin through hole 8-1, plug base first structure 8-2, plug base second structure

[0070] 8-3, plug base third structure 9, pin 10, pin inner end

[0071] 11. Pin solder cup 12. Inner end of the cannula 13. Cannula protection tube assembly

[0072] 14, cannula 15, middle part of the pin 15-1, pin clamp

[0073] 15-2, pin glue filling position 16, middle part of the cannula 16-1, cannula clamp

[0074] 16-2, Intubation glue filling position 17, Intubation welding cup DETAILED DESCRIPTION

[0075] The technical solution provided by the present invention is further illustrated below with reference to embodiments.

[0076] The purpose of the present invention is to overcome the problem of high voltage transmission inside the detector.

[0077] The present invention provides a high-voltage resistant micro-miniature inter-board electrical connector device. Figure 1 is a docking diagram of the high-voltage resistant micro-miniature inter-board electrical connector based on polyimide material of the present invention; the electrical connector is divided into: a plug structure 1 (pin) and a socket structure 2 (tube). When the connector is in use, the plug structure 1 and the socket structure 2 are paired for use.

[0078] The basic components of the plug structure 1 and the socket structure 2 include an insulator base, contact parts (pins, inserts), and a protective tube assembly.

[0079] Figure 2 (a) is a schematic diagram of the pin 9, Figure 2 (b) and Figure 2 (c) are schematic diagrams of the plug structure 1 at two different angles, Figure 2 (d) and Figure 2 (e) are side views and front views of the plug structure along the cross section, respectively; Figure 3 (a) is a schematic diagram of the insert 14, Figure 3 (b) is a schematic diagram of the socket structure 2, Figure 3 (c) and Figure 3 (d) are side views and front views of the socket structure along the cross section, respectively; after potting, the pin solder cup 11 and the adjacent portion of the plug base third structure 8-3 are filled with potting glue; the insert solder cup 17 and the adjacent portion of the socket base third structure 6-3 are filled with potting glue.

[0080] The plug structure 1 includes a plug base 8 and a pin 9. The inside of the plug base 8 is slotted according to the shape of the pin 9, and at least two vent holes 5, two glue holes 4, and two M2 screw mounting holes 7 are designed on the side wall. The pin 9 is inserted into the plug base 8 by impact, and glue is injected through the glue holes 4 to fix the plug base 8 and the pin 9.

[0081] The socket structure 2 includes a socket base 6, a plug 14, and a plug protective tube assembly 13. The inside of the socket base 6 is grooved according to the appearance design after the plug 4 and the plug protective tube assembly 13 are assembled, and at least two vent holes 5, two glue holes 4 and two M2 screw mounting holes 7 are designed on the side wall. The plug 14 and the plug protective tube assembly 13 are assembled by screwing. After the plug 14 and the plug protective tube assembly 13 are assembled, they are embedded in the socket base 6 by impact, and the three are glued and fixed through the glue holes.

[0082] Among them, the plug base 8 and the socket base 6 are both made of high-insulation polyimide (YS20) material. This material has good electrical properties, corrosion resistance, fatigue resistance, high temperature resistance, wear resistance, impact resistance, low density, and long service life. It is widely used in aerospace probe structural materials.

[0083] The contacts (pin 9, tube 14) are made of beryllium bronze (QSn4-3 Y), and the protective tube assembly 13 is made of stainless steel (0Cr18Ni10Ti). Both beryllium bronze (QSn4-3 Y) and stainless steel (0Cr18Ni10Ti) are commonly used materials for high-grade electrical connectors. The sealant used for potting is EC 104 A / B, an epoxy adhesive commonly used in aerospace products.

[0084] The electrical connector's structural design: The external insulator structure forms the base. Pins 9, tubes 14, and protective tube assembly 13 are first inserted into the base by impact, then secured by glue potting. There are two contacts. One end of the plug structure 1 features a pin-type contact, while one end of the receptacle structure 2 features a tube-type contact. Pins 9 mate with tubes 14. The other ends of both the plug structure 1 and the receptacle structure 2 feature solder-cup leads connected to solder points. The bases of each structure, respectively, have two mounting holes for M2 screws, allowing them to be secured to two parallel printed circuit boards.

[0085] Because the printed circuit boards are mounted within the chassis, the spacing between them is fixed, and the inter-board electrical connectors experience minimal stress, requiring low screw strength. Therefore, in this design, the mounting screws 3 of the electrical connector are made of polyimide material, which effectively prevents high-voltage discharge from the metal screws. To prevent high-voltage discharge between the two cores, the connector's pins 9 and tubes 14 are specially designed.

[0086] Design of cannula 14: The outer layer of cannula 14 is tightly wrapped with polyimide material.

[0087] Pin 9 Design: Pin 9 is surrounded by a polyimide outer layer, leaving a gap between the pin 9 and the polyimide wrapping that matches the diameter of the insert 14, enabling pin-to-pin insertion. Circular grooves are also designed on the sidewalls of the polyimide wrapping to increase the creepage distance of the polyimide surface. This design effectively reduces the risk of discharge when the two conductors transmit different high voltages.

[0088] In addition, in order to prevent residual gas inside the contact parts after the electrical connector is docked, which may cause discharge during high-voltage transmission under low pressure conditions, the side walls of the protective tube assembly 13, the socket base 6 and the plug base 8 are all designed with vent holes with a diameter of 1-1.5 mm, and the side wall of the insert tube (14) is designed with a groove with a width of 1-1.5 mm to ensure that the vacuum inside the electrical connector is good when used under vacuum conditions.

[0089] The wall thickness of the hollow cylinder shall not be less than 0.3mm;

[0090] The diameter of the solid cylinder 10 is 0.7 mm;

[0091] Installation method of the electrical connector: The connection method of the plug structure 1 and the socket structure 2 is crimping and locking, that is, crimping and locking are performed after assembly between the electronic box and the sensor or printed circuit board.

[0092] The schematic diagram of the electrical connector structure of this application is as follows Figure 1 The electrical connector shown weighs only 8g.

[0093] The socket structure 2 in the detector is fixed on the printed circuit board, such as Figure 4 ; The plug structure 1 is fixed on the metal table inside the detector sensor as shown Figure 5 As shown, Figure 6 The diagram shows the inter-board electrical connector of the present application installed at the junction of the electronics box and the sensor in the detector. The plug is installed on the base of the housing by screws, and the socket is fixed to the printed circuit board by screws.

[0094] In this implementation case, the performance of the electrical connector was tested, including the following:

[0095] 1. Normal pressure and high and low temperature power-on test: Temperature range: -35℃~+60℃, electrical connector assembled in the detector, high voltage transmission range: 0~-2000V.

[0096] 2. Thermal vacuum power-on test: Temperature range: -35℃~+60℃, electrical connector assembled inside the detector, high voltage transmission range: 0~-6000V.

[0097] 3. Rated withstand voltage test: Temperature: +85°C, the electrical connector is installed alone in the housing, the voltage difference between the two contacts is increased in steps from 1000V, 2000V, 3000V..., high voltage probes and current clamps are used to monitor the high voltage and current of the contacts, and the oscilloscope single pulse trigger method is used to monitor the discharge phenomenon. The high voltage is maintained for 60 minutes at each step. According to the test results, the withstand voltage between the two contacts of the electrical connector is better than 10kV.

[0098] From the above specific description of the present invention, it can be seen that the present invention adopts high-insulation, low-density polyimide material as the insulator base of the electrical connector, and at the same time increases the dielectric constant between the two cores in design, increases the creepage distance, and provides special designs such as vent holes on the connector, thereby effectively improving the withstand voltage value of the electrical connector and reducing the weight and volume of the electrical connector, which is conducive to the lightweight and miniaturized design of the detector.

[0099] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions to the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. A high-voltage-resistant micro-board electrical connector based on polyimide material, characterized in that: The electrical connector comprises: a plug base (8), a pin (9), a socket base (6) and a plug tube (14); The plug base (8) and the socket base (6) are both integrally processed from polyimide material; The main body materials of the insertion pin (9) and the insertion tube (14) are both metal, and a layer of polyimide material is wrapped around the outside of the main body material; The plug base (8) is provided with a pin through hole (8-0), and the pin (9) is arranged in the pin through hole (8-0) and is installed on the plug base (8); The socket base (6) is provided with a pipe through hole (6-0), the pipe (14) is arranged in the pipe through hole (6-0), and is installed on the socket base (6); The diameters of the pin through hole (8-0) and the tube through hole (6-0) are both irregularly designed to form annular concave-convex grooves that match the shapes of the pin (9) and the tube (14) respectively; The insertion pin (9) comprises in sequence: an insertion pin inner end portion (10), an insertion pin middle portion (15) and an insertion pin outer end portion; The cannula (14) comprises, in sequence: an inner cannula end portion (12), a middle cannula portion (16) and an outer cannula end portion; The inner end portion of the plug pin (10) and the inner end portion of the insert tube (12) are connected in pairs to form the electrical connector; the outer end portion of the plug pin and the outer end portion of the insert tube are respectively used for external circuit connection; The inner end portion (10) of the insertion pin is a solid cylinder; the inner end portion (12) of the insertion tube is a hollow cylinder with grooves on both sides; the inner end portion (10) of the insertion pin and the inner end portion (12) of the insertion tube are butted together in pairs; The grooves on both sides of the inner end portion (12) of the insert tube are used to prevent residual gas inside the electrical connector after the inner end portion (10) of the insert pin and the inner end portion (12) of the insert tube from causing the transmitted high-voltage signal to discharge at low pressure relative to air; The cannula (14) further includes a cannula assembly protective tube (13); The cannula assembly protective tube (13) is a hollow cylinder, which is screwed and fixed to the outside of the cannula butt end (12) by screwing, and is used for sealing and protecting the cannula butt end (12).

2. The high-voltage-resistant micro-miniature board-to-board electrical connector based on polyimide material according to claim 1, characterized in that: The middle portion (15) of the plug pin is used to fix the plug pin (9) in the plug base (8); after the plug pin (9) is installed in the plug base (8), a gap that is consistent with the wall thickness of the plug tube (14) is left between the inner end portion (10) of the plug pin and the plug base (8), so that the plug pin (9) and the plug tube (14) can be plugged in. The insert tube intermediate portion (16) is used to fix the insert tube (14) in the socket base (6).

3. The high-voltage-resistant micro-miniature board-to-board electrical connector based on polyimide material according to claim 2, characterized in that: The outer end of the pin is a pin solder cup (11); the outer end of the cannula is a cannula solder cup (17); The pin solder cup (11) and the tube solder cup (17) are respectively used for external circuits; The solder cup end of the pin and barrel is designed with the polyimide base higher than the solder cup.

4. The high-voltage-resistant micro-miniature board-to-board electrical connector based on polyimide material according to claim 2 or 3, characterized in that: The pin middle part (15) includes: a pin clamp (15-1) and a pin glue injection position (15-2); the outer perimeter of the pin clamp (15-1) is greater than the outer perimeter of the pin glue injection position (15-2); The cannula middle part (16) includes: a cannula clamp (16-1) and a cannula glue injection position (16-2); the outer perimeter of the cannula clamp (16-1) is greater than the outer perimeter of the cannula glue injection position (16-2); The pin clamp (15-1) is used to fasten the pin (9) to a corresponding position in the pin through hole (8-0) when the pin (9) is inserted into the plug base (8) by impact; the pin glue injection position (15-2) is used to inject glue after the pin (9) is inserted into the corresponding position, so as to bond the pin (9) and the plug base (8); The insert tube clamp (16-1) is used to fasten the insert tube (14) to a corresponding position in the insert tube through hole (6-0) when the insert tube (14) is inserted into the socket base (6) by impact; the insert tube glue injection position (16-2) is used to inject glue after the insert tube (4) is inserted into the corresponding position, so as to bond the insert tube (14) and the socket base (6).

5. The high-voltage-resistant micro-miniature board-to-board electrical connector based on polyimide material according to claim 4, characterized in that: The side wall of the socket base (6) and the side wall of the plug base (8) are both provided with a glue injection hole (4) and an air release hole (5); The glue injection hole (4) on the side wall of the socket base (6) is used for injecting glue after the insert tube (14) is inserted into the socket base (6) by impact, so that the insert tube glue injection position (16-2) is tightly bonded to the socket base (6); The glue injection hole (4) on the side wall of the plug base (8) is used for injecting glue after the plug pin (9) is embedded in the plug base (8) by impact, so that the plug pin injection position (15-2) is tightly bonded to the plug base (8); The vent hole (5) is used to exhaust gas when the socket and plug are connected to prevent gas from remaining; Among them, the glue pouring adopts vacuum glue pouring and is carried out in a vacuum environment to prevent residual gas from appearing inside the glue pouring.

6. The high-voltage-resistant micro-miniature board-to-board electrical connector based on polyimide material according to claim 5, characterized in that: The plug pin (9) is embedded into the plug base (8) by impact and then glue-filled to form a plug structure (1); The insert (14) is embedded in the socket base (6) by impact and then glued to form a socket structure (2); The connection mode between the plug structure (1) and the socket structure (2) is crimping and locking.

7. The high-voltage-resistant micro-miniature board-to-board electrical connector based on polyimide material according to claim 6, characterized in that: The electrical connector further comprises a mounting screw (3) made of polyimide; The mounting screws (3) are used to fix the connected plug structure (1) and socket structure (2) at a set position.

8. The high-voltage-resistant micro-miniature board-to-board electrical connector based on polyimide material according to claim 7, characterized in that: The plug base (8) comprises: a first plug base structure (8-1), a second plug base structure (8-2) and a third plug base structure (8-3); The first plug base structure (8-1) is a cylindrical body with a through hole formed therein, which is the remainder after the two sides of the cylindrical body are cut off in parallel along the height direction of the cylindrical body; The second plug base structure (8-2) is a cylindrical body with a through hole formed therein, which is the result of cutting off the two sides of the cylindrical body in parallel along the height direction of the cylindrical body; the cross-sectional area of ​​the second plug base structure (8-2) is larger than that of the first plug base structure (8-1), and at least one screw mounting hole (7) is formed on each side; The third structure (8-3) of the plug base is a column with a through hole and a rounded rectangular cross section; The through holes of the first plug base structure (8-1), the second plug base structure (8-2) and the third plug base structure (8-3) are connected to form a pin through hole (8-0); at least two pin through holes (8-0) are provided; when the pin (9) is installed in the plug base (8), the third plug base structure (8-1) corresponds to the direction of the inner end portion (10) of the pin, and the third plug base structure (8-3) corresponds to the direction of the pin solder cup (11).

9. The high-voltage-resistant micro-miniature board-to-board electrical connector based on polyimide material according to claim 8, characterized in that: The socket base (6) comprises: a socket base first structure (6-1), a socket base second structure (6-2) and a socket base third structure (6-3); The first structure (6-1) of the socket base is a hollow cylinder surrounding the insertion tube through hole (6-0); The second structure (6-2) of the socket base is a cylinder with a through hole, and at least one screw mounting hole (7) is respectively opened on both sides of the cylinder; The third structure (6-3) of the socket base is a column with a through hole and a rounded rectangular cross section; The hollow cylindrical portion of the first structure (6-1) of the socket base, the through hole of the second structure (6-2) of the socket base, and the through hole of the third structure (6-3) of the socket base are connected to form an inserting tube through hole (6-0); at least two inserting tube through holes (6-0) are provided; After the pins (9) and the insert tube (14) are connected in pairs, the distance between the two groups meets the high-voltage safety distance; when the insert tube (14) is installed in the socket base (6), the first structure (6-1) of the socket base corresponds to the direction of the insert tube (14) docking end (12), and the third structure (6-3) of the socket base corresponds to the direction of the insert tube welding cup (17).

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