A single-core mating connector

Abstract

This invention discloses a single-core mating connector in the field of electrical connector technology, aiming to solve the problems of air entrapment and unbalanced air pressure in existing electrical connectors during blind hole sealing mating. It includes a plug and a socket; the plug includes pins, each pin comprising an inner guide rod and an insulating layer, with a conductive portion formed on the inner guide rod; the socket includes an inner conductor, which is encased in an insulating shell, with a conductive element at one end of the insulating shell and a mating hole at the other end, a conductive through-hole at one end of the inner conductor, a mounting cavity formed within the insulating shell, and an vent hole on the outside of the insulating shell; the conductive element includes an outer shell and a conductive core; this invention is applicable to connectors used in oil well logging, enabling gas present in the mating hole, conductive through-hole, and mounting cavity to be discharged to the outside of the socket through the vent hole, avoiding air entrapment and unbalanced air pressure. Furthermore, the vent hole is sealed after mating to prevent external oil-water mixtures from entering the socket, ensuring connection stability.

Description

Technical Field

[0001] This invention relates to the field of electrical connector technology, specifically to a single-core mating connector. Background Technology

[0002] As the depth of onshore oil logging continues to increase, the electrical equipment used inside logging instruments is constantly evolving towards integration and pressure resistance, requiring individual connectors to possess temperature and pressure resistance capabilities. Currently, the main pressure-resistant sealing structures used in oil logging connectors include glass sintered structures, PEEK injection molded structures, and rubber vulcanization. Among these, glass sintered structures can withstand temperatures up to 200℃ and hydraulic pressure up to 172MPa; PEEK injection molded structures can withstand temperatures up to 200℃ and hydraulic pressure up to 140MPa; and rubber vulcanization structures can withstand temperatures up to 200℃ and hydraulic pressure up to 172MPa.

[0003] The main method for mating plugs and sockets in existing high-temperature and high-pressure resistant connectors is blind-hole sealing, such as the mating of rubber vulcanized sockets and glass sintered plugs, where the sealing structure is a blind-hole rubber interference seal. However, the above mating method introduces air trapping and unbalanced air pressure within the blind hole, which can affect the product's mating performance and cause the connector to detach automatically over time. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a single-core mating connector that solves the problems of air stagnation and unbalanced air pressure in current electrical connectors when sealing and mating with blind holes.

[0005] To solve the above-mentioned technical problems, the present invention is implemented using the following technical solution:

[0006] This invention provides a single-core mating connector, comprising: a plug and a socket adapted to the plug;

[0007] The plug includes pins, each pin including an inner guide rod and an insulating layer wrapped around the outer side of the inner guide rod, wherein a portion of the outer wall of the inner guide rod extends radially to be exposed relative to the insulating layer to form a conductive portion;

[0008] The socket includes an inner conductor, which is wrapped with an insulating shell. One end of the insulating shell is provided with a conductive element, and the other end is provided with a mating hole that matches the pin. The insulating shell forms a mounting cavity that matches the pin inside the inner conductor. One end of the inner conductor is provided with a conductive through hole. The mating hole, the conductive through hole, and the mounting cavity are connected in sequence and coaxially arranged. The insulating shell is provided with an exhaust hole that communicates with the mounting cavity.

[0009] The conductive component includes an outer shell and a conductive core disposed within the outer shell, the conductive core being electrically connected to the inner conductor.

[0010] Furthermore, both the inner and outer surfaces of the inner conductor are covered by the insulating shell, and a portion of the inner wall of the inner conductor is exposed relative to the insulating shell to form a mounting end for mounting the conductive part. The mounting end and the inner wall of the insulating shell form the placement cavity; and / or, the vent hole communicates with the placement cavity at the end of the placement cavity away from the mounting end; and / or, when the plug and the socket are in an assembled state, the insulating layer of the pin is in contact with the inner wall of the insulating shell of the socket to seal and block the vent hole.

[0011] Furthermore, the inner conductor includes a mounting end, a mating end, and a connecting rib disposed between the mounting end and the mating end. At least two connecting ribs are provided and symmetrically distributed about the axis of the inner conductor. The insulating shell is made of flexible insulating material, and the space between each pair of adjacent connecting ribs is filled with the insulating shell. An elastic conductive element is installed within the conductive through-hole. When the plug and the socket are in an assembled state, the elastic conductive element is located between the inner wall of the conductive through-hole and the conductive portion, and there is elasticity between the elastic conductive element and the conductive portion.

[0012] Furthermore, a crown spring for clamping the conductive part is installed in the conductive through hole, and the crown spring is electrically connected to the inner conductor.

[0013] Furthermore, the insulating shell is provided with a metal elastic element, which is located between the mating end and the conductive element, thereby realizing the electrical connection between the inner conductor and the conductive element.

[0014] Furthermore, the metal elastic element is a spring, a first positioning post is provided on the mating end, a second positioning post is provided at the end of the conductive core near the inner conductor, and the two ends of the spring are respectively sleeved on the first positioning post and the second positioning post.

[0015] Furthermore, a first annular protrusion is provided on the circumferential inner wall of the docking hole, and a second annular protrusion is provided on the circumferential inner wall of the mounting cavity between the conductive through hole and the vent hole.

[0016] When the plug and socket are connected, the first and second annular protrusions fit tightly against the outer wall of the pin to seal the conductive through hole.

[0017] Furthermore, the mounting end is fixedly fitted with a protective tube, and the protective tube has a guide through hole. The docking hole, the guide through hole, the conductive through hole and the mounting cavity are connected in sequence and coaxially arranged.

[0018] The elastic conductive element is a crown spring. The end of the guide hole near the docking hole gradually expands outward along the axial direction from near the inner conductor to away from the inner conductor, which is used to guide the pin to complete the insertion with the crown spring.

[0019] Furthermore, the inlet end of the docking hole is provided with an annular inclined groove, which is coaxially arranged with the docking hole to guide the pin to complete the insertion with the docking hole.

[0020] Furthermore, the outer shell is provided with a docking annular groove at one end near the inner conductor, and a first retaining groove is provided on the side wall of the docking annular groove;

[0021] The insulating shell has a mating protrusion at one end near the outer shell that is adapted to the mating groove, and the inner side wall of the mating protrusion has a first protrusion that is adapted to the first slot.

[0022] Furthermore, the outer shell is provided with a sleeve that matches the mating protrusion ring at one end near the inner conductor, and the sleeve is provided with multiple limiting grooves at one end near the insulating shell.

[0023] The limiting grooves are arranged sequentially along the circumference of the sleeve and penetrate the sleeve radially, so that an insert is formed between two adjacent limiting grooves. The mating protrusion ring is provided with a limiting block that matches the limiting groove.

[0024] The inner wall of the insert is provided with a second slot, and the outer wall of the mating ring is provided with a second protrusion that matches the second slot.

[0025] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0026] 1. By providing vent holes, the present invention allows the gas present in the mating hole, conductive through hole, and mounting cavity to be discharged to the outside of the socket during the mating process, thereby avoiding air entrapment and unbalanced air pressure. After mating, the insulating layer can fully fit the mounting cavity and mating hole, thereby sealing the vent holes and preventing external oil and water mixtures from entering the socket from the vent holes, avoiding corrosion of conductive components and ensuring the stability of the connector's electrical connection.

[0027] 2. This invention, by setting up elastic conductive elements and multiple connecting ribs, and making the insulating shell made of flexible insulating material, provides deformation space for the insulating shell located inside the inner conductor in the area between adjacent connecting ribs. After the pin and the socket are inserted into place, if the pin is axially offset relative to the socket due to shaking, the insulating shell inside the inner conductor can move toward the deformation space, and the insulating shell originally filled in the deformation space can move toward the outside of the inner conductor, so that the insulating shell and the pin can float at a larger angle, thereby achieving the purpose of flexible docking. At the same time, the conductive part of the pin is always electrically connected to the installation end of the socket through the elastic conductive elements, which improves the anti-interference ability, ensures the stability of the docking, and has a good overall effect.

[0028] 3. The present invention uses the first and second annular protrusions to fit tightly against the outer wall of the pin, thereby sealing the conductive through holes from both ends. This prevents external factors from interfering with the electrical connection between the crown spring and the conductive part through the vent hole or docking hole, enabling the connector to adapt to harsher working conditions. It has strong anti-interference ability and a wide range of applications.

[0029] 4. By aligning the mating protrusion with the mating groove and engaging the first protrusion with the first slot, this invention ensures the stability of the connection between the insulating shell and the conductive component, strengthens the bonding force between the insulating shell and the conductive component, reduces the probability of accidental separation during use, and improves the structural strength of the connector. Attached Figure Description

[0030] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0031] Figure 1 This is a front cross-sectional view of a socket in a single-core mating connector provided in an embodiment of the present invention;

[0032] Figure 2 This is a front cross-sectional view of the plug in a single-core mating connector provided in an embodiment of the present invention;

[0033] Figure 3 yes Figure 1 The diagram shows a front sectional view of the insulating housing in a single-core mating connector.

[0034] Figure 4 yes Figure 1 The front cross-sectional view of the conductive component in the single-core mating connector shown.

[0035] Figure 5 yes Figure 1 The diagram shows a front cross-sectional view of the inner conductor in a single-core mating connector.

[0036] Figure 6 yes Figure 1 A schematic diagram of the inner conductor in the single-core mating connector shown.

[0037] Figure 7 yes Figure 1 The diagram shows the structural structure of the outer shell of the single-core mating connector.

[0038] Figure 8 yes Figure 1 The diagram shows a front sectional view of the insert in a single-core mating connector.

[0039] In the diagram: 1. Plug; 11. Pin; 111. Inner guide rod; 112. Insulating layer; 113. Conductive part; 2. Socket; 21. Inner conductor; 211. Mounting end; 211a. Conductive through hole; 212. Butt end; 212a. First positioning post; 213. Connecting rib; 22. Insulating shell; 221. Butt hole; 221a. First annular protrusion; 221b. Annular groove; 222. Resettling cavity; 222a. Second annular protrusion; 223. 224. Vent hole; 225. Docking ring; 226. First protrusion; 227. Limiting block; 228. Second protrusion; 23. Conductive component; 231. Outer shell; 231a. Docking ring groove; 231b. First slot; 232. Conductive core; 232a. Second positioning post; 233. Sleeve; 233a. Limiting groove; 233b. Insert; 233c. Second slot; 24. Crown spring; 25. Spring; 26. Protective tube; 261. Guide through hole. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] Example 1:

[0044] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a single-core mating connector, including: a plug 1 and a socket 2 adapted to the plug 1;

[0045] The plug 1 includes a pin 11, which includes an inner guide rod 111 and an insulating layer 112 wrapped around the outer side of the inner guide rod 111. A portion of the outer wall of the inner guide rod 111 extends radially to be exposed relative to the insulating layer 112 to form a conductive portion 113.

[0046] The socket 2 includes an inner conductor 21, which is wrapped with an insulating shell 22. One end of the insulating shell 22 is provided with a conductive element 23, and the other end is provided with a mating hole 221 that matches the pin 11. The insulating shell 22 forms a mounting cavity 222 that matches the pin 11 inside the inner conductor 21. One end of the inner conductor 21 is provided with a conductive through hole 211a. The mating hole 221, the conductive through hole 211a and the mounting cavity 222 are connected in sequence and coaxially arranged. The insulating shell 22 is provided with an exhaust hole 223 that communicates with the mounting cavity 222.

[0047] It is understandable that the mating hole 221, the conductive through hole 211a, and the mounting cavity 222 are connected in sequence and coaxially arranged, which are used to adapt to the pin 11 so that the pin 11 can be fully fitted after insertion, avoiding the situation where it cannot be smoothly inserted.

[0048] The conductive element 23 includes an outer shell 231 and a conductive core 232 disposed within the outer shell 231. The conductive core 232 is electrically connected to the inner conductor 21.

[0049] During the connection process, the pin 11 on the plug 1 is inserted into the connection hole 221 on the socket 2 until it passes through the connection hole 221, the conductive through hole 211a and the mounting cavity 222. Finally, when the connection is completed, the conductive part 113 is located in the conductive through hole 211a and is electrically connected to it. Thus, the inner guide rod 111 is electrically connected to the inner conductor 21 through the conductive part 113, thereby completing the blind hole connection between the plug 1 and the socket 2.

[0050] It should be noted that during the insertion of the pin 11, the gas present in the mating hole 221, the conductive through hole 211a and the mounting cavity 222 is discharged to the outside of the socket 2 through the vent hole 223. Therefore, there will be no air stagnation or unbalanced air pressure, thus avoiding the situation of automatic detachment after long-term use.

[0051] Furthermore, since both the mating hole 221 and the mounting cavity 222 are matched with the pin 11, after the mating is completed, the insulating layer 112 can fully fit with the mounting cavity 222 and the mating hole 221, thereby sealing the vent hole 223. This prevents external oil and water mixtures from entering the socket 2 from the vent hole 223, avoiding corrosion of the conductive components and ensuring the stability of the connector's electrical connection.

[0052] like Figure 5 and Figure 6 As shown, in this embodiment, the inner conductor 21 includes a mounting end 211, a docking end 212, and a connecting rib 213 disposed between the mounting end 211 and the docking end 212. The connecting rib 213 is provided in at least two parts and is symmetrically distributed about the axis of the inner conductor 21.

[0053] It should be noted that the connecting ribs 213 are symmetrically distributed about the axis of the inner conductor 21, and are used for the electrical connection between the mounting end 211 and the mating end 212. The middle position is the location of the mounting cavity 222. The vent hole 223 is positioned to avoid the connecting ribs 213, and is connected to the mounting cavity 222 through the opening between two adjacent connecting ribs 213. In addition, at least two connecting ribs 213 are provided to ensure the structural stability of the inner conductor 21, but it is not limited to this, and there may be three or more, which can be adjusted accordingly.

[0054] like Figure 1 and Figure 3 As shown, in this embodiment, an elastic conductive member 24 for clamping the conductive part 113 is installed in the conductive through hole 211a. The elastic conductive member 24 includes a crown spring 24, which is electrically connected to the inner conductor 21.

[0055] Specifically, when the plug 1 and socket 2 are fully engaged, the conductive part 113 is located within the conductive through hole 211a and is held by the crown spring 24, thereby achieving an electrical connection between the conductive part 113 and the conductive through hole 211a. This allows it to maintain stable contact for a long time, is not easily affected by external factors, avoids the occurrence of connector open circuit due to poor contact, and has strong anti-interference ability.

[0056] In this embodiment, the insulating shell 22 is made of flexible insulating material, and a metal elastic element is provided inside the insulating shell 22. The metal elastic element is located between the mating end 212 and the conductive element 23, thereby realizing the electrical connection between the inner conductor 21 and the conductive element 23.

[0057] It should be noted that flexible insulation materials include, but are not limited to, rubber, polypropylene, modified epoxy resin, etc., as long as they meet the usage requirements, without specific limitations.

[0058] Specifically, after the plug 1 and socket 2 are inserted into place, the elasticity of the metal elastic element and the insulating shell 22 allows the insulating shell 22 and plug 1 to float at a certain angle, thereby achieving flexible docking, improving anti-interference ability, ensuring the stability of docking, and achieving good overall performance.

[0059] Understandably, since the crown spring 24 and the conductive part 113 are in elastic contact, and the insulating shell 22 is made of flexible insulating material, after the pin 11 is inserted, it can still make a small deflection movement and maintain stable contact within the mating hole 221, the conductive through hole 211a and the mounting cavity 222. It has high connection stability, strong anti-interference ability, and greatly reduces the probability of connector damage.

[0060] Preferably, the metal elastic element is a spring 25, with a first positioning post 212a on the mating end 212, and a second positioning post 232a on the end of the conductive core 232 near the inner conductor 21. The two ends of the spring 25 are respectively sleeved on the first positioning post 212a and the second positioning post 232a.

[0061] Specifically, the first positioning post 212a and the second positioning post 232a are both covered by the insulating shell 22, and the two ends of the spring 25 are respectively sleeved on it. The above arrangement ensures the stability of the electrical connection between the docking end 212 and the conductive core 232, thereby reducing the probability of open circuit when the angle fluctuates, and the stability is high.

[0062] like Figure 3 As shown, in this embodiment, a first annular protrusion 221a is provided on the circumferential inner wall of the mating hole 221, and a second annular protrusion 222a is provided on the circumferential inner wall of the mounting cavity 222 between the conductive through hole 211a and the vent hole 223; when the plug 1 and the socket 2 are mated, the first annular protrusion 221a and the second annular protrusion 222a are tightly fitted with the outer wall of the pin 11 to seal the conductive through hole 211a.

[0063] It should be noted that the cross-section of the first annular protrusion 221a and the second annular protrusion 222a is preferably arc-shaped, which facilitates the insertion and removal of the pin 11 and improves the smoothness of the connection. In addition, they are integrally formed with the insulating shell 22 and are both made of flexible insulating material. Therefore, during the insertion and removal, the pin 11 can be squeezed to generate elastic deformation, which can keep it in close contact with the outer wall of the pin 11, thereby ensuring that the insertion and removal force is moderate and preventing the plug 1 from falling off automatically after long-term use.

[0064] Specifically, after docking, the first annular protrusion 221a and the second annular protrusion 222a fit tightly against the outer wall of the pin 11, further sealing the conductive through hole 211a from both ends. This prevents external factors from interfering with the electrical connection between the crown spring 24 and the conductive part 113 through the vent hole 223 or the docking hole 221, enabling the connector to adapt to harsher working conditions. It has strong anti-interference ability and a wide range of applications.

[0065] like Figure 1 As shown, in this embodiment, the mounting end 211 is fixedly sleeved with a protective tube 26, and a guide through hole 261 is provided on the protective tube 26. The docking hole 221, the guide through hole 261, the conductive through hole 211a and the mounting cavity 222 are connected in sequence and coaxially arranged. The end of the guide through hole 261 near the docking hole 221 gradually expands outward along the axial direction from near the inner conductor 21 to away from the inner conductor 21, which is used to guide the pin 11 and the crown spring 24 to complete the insertion.

[0066] It is understandable that the fixed sleeve of the protective tube 26 and the mounting end 211 can be crimped or threaded, and there is no specific limitation. Among them, the width of the guide hole 261 is smaller than the width of the crown spring 24, so the crown spring 24 can be limited and locked in the conductive through hole 211a, which facilitates the production and manufacturing of the connector.

[0067] Specifically, during the mating process, the guide hole 261 can guide the offset pin 11 to accurately engage with the crown spring 24, thereby improving the performance of the connector.

[0068] like Figure 3 As shown, in this embodiment, the inlet end of the docking hole 221 is provided with an annular inclined groove 221b, which is coaxially arranged with the docking hole 221 to guide the pin 11 to complete the insertion with the docking hole 221.

[0069] Specifically, during the insertion process, the annular groove 221b can guide the offset pin 11, enabling it to accurately insert into the mating hole 221, thus improving the smoothness of the insertion and achieving good overall performance.

[0070] Example 2:

[0071] like Figure 3 and Figure 4 As shown, this embodiment provides a single-core mating connector, which differs from the first embodiment in that the outer shell 231 has a mating ring groove 231a at one end near the inner conductor 21, and a first slot 231b is provided on the side wall of the mating ring groove 231a; the insulating shell 22 has a mating protrusion 224 adapted to the mating ring groove 231a at one end near the outer shell 231, and a first protrusion 225 adapted to the first slot 231b is provided on the inner side wall of the mating protrusion 224.

[0072] It should be noted that the first slot 231b can be a plurality of grooves arranged sequentially along the circumference of the mating annular groove 231a, or it can be an annular groove. The specific design is not limited and can be adjusted accordingly.

[0073] Specifically, after the insulating shell 22 and the conductive component 23 are connected, the mating protrusion 224 aligns with the mating ring groove 231a, and the first protrusion 225 engages with the first slot 231b. This ensures the stability of the connection between the insulating shell 22 and the conductive component 23, strengthens the bonding force between them, reduces the probability of accidental separation during use, and improves the structural strength of the connector.

[0074] like Figure 3 and Figure 7 As shown, in this embodiment, the outer shell 231 is provided with a sleeve 233 that matches the mating protrusion ring 224 at one end near the inner conductor 21, and the sleeve 233 is provided with a plurality of limiting grooves 233a at one end near the insulating shell 22; the limiting grooves 233a are arranged sequentially along the circumference of the sleeve 233 and penetrate the sleeve 233 radially, so that an insert 233b is formed between two adjacent limiting grooves 233a, and the mating protrusion ring 224 is provided with a limiting block 226 that matches the limiting groove 233a.

[0075] Specifically, after the insulating shell 22 and the conductive element 23 are connected, the sleeve 233 is fitted onto the outside of the mating protrusion 224, and the limiting block 226 engages with the limiting groove 233a, so that the limiting block 226 and the insert 233b are arranged in an alternating pattern along the circumference of the conductive element 23. This greatly increases the contact area between the insulating shell 22 and the conductive element 23, significantly improves the bonding force between them, and restricts the relative circumferential rotation between them, thus enhancing stability.

[0076] like Figure 7 and Figure 8 As shown, in this embodiment, the inner wall of the insert 233b is provided with a second slot 233c, and the outer wall of the mating ring 224 is provided with a second protrusion 227 that matches the second slot 233c.

[0077] Specifically, after the insulating shell 22 and the conductive component 23 are connected, the second protrusion 227 engages with the second slot 233c, which further improves the stability of the connection between the insulating shell 22 and the conductive component 23, strengthens the bonding force, and results in a high degree of bonding firmness.

[0078] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A single-core mating connector, characterized in that, include: Plug (1) and socket (2) adapted to plug (1); The plug (1) includes a pin (11), the pin (11) includes an inner guide rod (111) and an insulating layer (112) wrapped around the outer side of the inner guide rod (111), and a portion of the outer wall of the inner guide rod (111) extends radially to be exposed relative to the insulating layer (112) to form a conductive part (113). The socket (2) includes an inner conductor (21), which is wrapped with an insulating shell (22). One end of the insulating shell (22) is provided with a conductive element (23), and the other end is provided with a mating hole (221) that matches the pin (11). The insulating shell (22) forms a mounting cavity (222) that matches the pin (11) inside the inner conductor (21). One end of the inner conductor (21) is provided with a conductive through hole (211a). The mating hole (221), the conductive through hole (211a) and the mounting cavity (222) are connected in sequence and coaxially arranged. The insulating shell (22) is provided with an exhaust hole (223) that communicates with the mounting cavity (222). When the plug (1) and the socket (2) are in the assembled state, the insulating layer (112) of the pin (11) and the inner wall of the insulating shell (22) of the socket (2) are attached to each other to seal and block the exhaust hole (223). The conductive element (23) includes an outer shell (231) and a conductive core (232) disposed within the outer shell (231), wherein the conductive core (232) is electrically connected to the inner conductor (21).

2. The single-core mating connector according to claim 1, characterized in that: The inner and outer surfaces of the inner conductor (21) are both covered by the insulating shell (22). A portion of the inner wall of the inner conductor (21) is exposed relative to the insulating shell (22) to form a mounting end (211) for mounting the conductive part (113). The mounting end (211) and the inner wall of the insulating shell (22) form the placement cavity (222). And / or, the vent (223) communicates with the placement cavity (222) at one end of the placement cavity (222) away from the mounting end (211).

3. The single-core mating connector according to claim 1, characterized in that: The inner conductor (21) includes a mounting end (211), a mating end (212), and a connecting rib (213) disposed between the mounting end (211) and the mating end (212). The connecting rib (213) is provided in at least two and is symmetrically distributed about the axis of the inner conductor (21). The insulating shell (22) is made of flexible insulating material, and the insulating shell (22) is filled between each two adjacent connecting ribs (213). An elastic conductive element (24) is installed in the conductive through hole (221a). When the plug (1) and the socket (2) are in the assembled state, the elastic conductive element (24) is located between the inner wall of the conductive through hole (221a) and the conductive part (113), and there is elasticity between the elastic conductive element (24) and the conductive part (113).

4. The single-core mating connector according to claim 3, characterized in that: The insulating shell (22) is provided with a metal elastic element, which is located between the mating end (212) and the conductive element (23) to realize the electrical connection between the inner conductor (21) and the conductive element (23).

5. The single-core mating connector according to claim 4, characterized in that: The metal elastic element is a spring (25), the docking end (212) is provided with a first positioning post (212a), the conductive core (232) is provided with a second positioning post (232a) at one end near the inner conductor (21), and the two ends of the spring (25) are respectively sleeved on the first positioning post (212a) and the second positioning post (232a).

6. The single-core mating connector according to claim 1, characterized in that: The docking hole (221) has a first annular protrusion (221a) on its circumferential inner wall, and the mounting cavity (222) has a second annular protrusion (222a) on its circumferential inner wall between the conductive through hole (211a) and the vent hole (223). When the plug (1) and socket (2) are connected, the first annular protrusion (221a) and the second annular protrusion (222a) fit tightly against the outer wall of the pin (11) to seal the conductive through hole (211a).

7. The single-core mating connector according to claim 3, characterized in that: The mounting end (211) is fixedly fitted with a protective tube (26), and a guide through hole (261) is opened on the protective tube (26). The docking hole (221), the guide through hole (261), the conductive through hole (211a) and the mounting cavity (222) are connected in sequence and coaxially arranged. The elastic conductive element (24) is a crown spring. The guide hole (261) near the docking hole (221) gradually expands outward along the axial direction from near the inner conductor (21) to away from the inner conductor (21) to guide the pin (11) to complete the insertion with the crown spring.

8. The single-core mating connector according to claim 1, characterized in that: The inlet end of the docking hole (221) is provided with an annular inclined groove (221b), which is coaxially arranged with the docking hole (221) to guide the pin (11) to complete the insertion with the docking hole (221).

9. The single-core mating connector according to any one of claims 1-8, characterized in that: The outer casing (231) has a docking annular groove (231a) at one end near the inner conductor (21), and a first slot (231b) is provided on the side wall of the docking annular groove (231a). The insulating shell (22) has a docking protrusion (224) that is adapted to the docking groove (231a) at one end near the outer shell (231). The inner side wall of the docking protrusion (224) is provided with a first protrusion (225) that is adapted to the first slot (231b).

10. The single-core mating connector according to claim 9, characterized in that: The outer shell (231) has a sleeve (233) that matches the mating protrusion ring (224) at one end near the inner conductor (21), and the sleeve (233) has a plurality of limiting grooves (233a) at one end near the insulating shell (22). The limiting grooves (233a) are arranged sequentially along the circumference of the sleeve (233) and penetrate the sleeve (233) radially, so that inserts (233b) are formed between two adjacent limiting grooves (233a). The mating protrusion (224) is provided with a limiting block (226) that matches the limiting grooves (233a). The inner wall of the insert (233b) is provided with a second slot (233c), and the outer wall of the mating ring (224) is provided with a second protrusion (227) that is adapted to the second slot (233c).

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