A compact electrical connector

Abstract

The present invention relates to a compact electrical connector, comprising a plug and a socket, wherein the plug comprises an insulating outer shell and a jack component arranged in an inner shielding shell, wherein the jack component has at least two jacks, the jack having a first chamber for accommodating a jack contact, and a second chamber for accommodating a cable end, and a threading hole for the cable to be inserted into the rear end of the insulating outer shell; the axis of the second chamber of the jack and the axis of the first chamber are eccentrically arranged; or the axis of the jack and the axis of the threading hole are eccentrically arranged. The eccentric arrangement of the plug can also be applied to the socket end. By eccentrically arranging the axis, the axis of the jack or the socket or the chamber accommodating the cable does not need to follow the axis of the cable with a larger diameter, thereby reducing the space occupied by the terminal in the connector, allowing the connector to accommodate larger-specification cables in a smaller occupied space or occupy a smaller space when using cables of the same specification, and the overall structure is more compact.

Description

Technical Field

[0001] The present invention relates to the field of electrical connectors, and in particular to a compact electrical connector with high electromagnetic shielding performance and high vibration resistance performance for new energy vehicles. Background Art

[0002] At present, the development of new energy vehicles in the world has become a general trend. China's new energy vehicles have become the world's largest manufacturing base and consumer market. Its related industries such as charging equipment, three-electric equipment, high-voltage connectors and their wiring harness assemblies have also ushered in rapid growth in China. CN105098482B discloses a step-by-step locking device for electric vehicle connector plugs. The device adopts a step-by-step locking device with good reliability and safety, but its disadvantages are that the structure is relatively complex, difficult to use, and high maintenance costs. CN102916303 discloses a plastic shell connector with a shielding and high-voltage interlocking structure. The scheme adopts a locking device with a single cantilever. The cantilever protrudes more from the circumference of the connector, the spatial layout is not compact, and only relies on the plastic cantilever to achieve locking. It is easy to fail in a strong vibration environment. The shielding net method adopted in the scheme realizes the shielding of electromagnetic interference. However, the overall shielding of such shielding nets cannot achieve true all-round shielding protection. In the future intelligent cars, it is still impossible to achieve a good shielding effect. There is a potential major risk of electromagnetic interference generated by important control components of intelligent cars. Another type of shielding method uses a metal shell plus a circumferential shielding spring structure. Although overall shielding can be achieved, the product is too heavy and often uses a circumferential shielding spring for shell connection. The spring is prone to large insertion and removal forces, and there is a risk of failure such as permanent deformation of the spring, and the shielding resistance is relatively high. Summary of the invention

[0003] The object of the present invention is to provide a compact high-voltage electrical connector which is omnidirectionally resistant to electromagnetic interference and has high anti-vibration performance.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A compact electrical connector includes a plug and a socket. The plug includes an insulating outer housing and a jack component disposed within an inner shielding housing. The jack component has at least two jacks. Each jack has a first chamber for receiving a jack contact and a second chamber for receiving the end of a cable. A wire passing hole is provided at the tail end of the insulating outer housing for the cable to pass through. The axes of the second chambers of the jacks and the axes of the first chambers are eccentrically arranged such that the distance s2 between the axes of the second chambers is greater than the distance s1 between the axes of the first chambers, i.e., s1 < s2. Alternatively, the axes of the jacks and the axis of the wire passing hole are eccentrically arranged such that the distance s3 between the axes of the cables within the wire passing hole is greater than the distances s1 and s2 between the axes of the first and second chambers of the jacks. Herein, the axes of the first and second chambers of the jacks may be coaxial or eccentrically arranged, i.e., s1 = s2 < s3 or s1 < s2 < s3. The above-described eccentric arrangement of the plug can also be applied to the socket end. The above improvement of the present invention overcomes the coaxial arrangement in the prior art's conventional thinking. By the eccentric arrangement of the axes, the axes of the jacks or the socket or the chambers for accommodating the cables do not need to be arranged following the axis of the cable with a larger diameter, thereby reducing the occupied space of the terminals in the connector. This enables the connector to accommodate a larger specification cable in a smaller occupied space or occupy a smaller space when using cables of the same specification, making the overall structure more compact.

[0006] A further improvement of the present invention is that the insulating outer housing of the plug or the socket is formed by plastic injection molding, and the inner shielding housing is formed by casting. Moreover, the insulating outer housing and the inner shielding housing are tightly combined together to form a composite housing by interference fitting, insert molding, or ultrasonic welding. The composite housing well balances and combines the advantages of a fully plastic housing and a fully metal housing. Its insulating outer housing provides functions of plastic parts such as insulation protection, integral clamping, corrosion resistance, and light weight. Its integrally cast inner shielding housing provides an all-round shielding function and greatly strengthens the strength of the key stress points. When the plug and the socket are plugged together, the outer insulating housing of the plug and the outer insulating housing of the socket can achieve the efficient locking function of a plastic connector. At the same time, the inner shielding housings are butt-jointed and overlapped, and are preferentially stressed compared to the plastic housing in a vibrating environment, greatly increasing the structural strength of the product.

[0007] A further improvement of the present invention is that a groove is provided on the inner shielding housing of the plug or the socket for placing a conductive sealing ring. The conductive sealing ring can effectively avoid the problem of shielding spring failure, greatly reduce the insertion and extraction resistance during the plugging and unplugging operations of the connector, and can adjust the shielding resistance level by selecting the conductive sealing ring according to the shielding resistance requirements. Preferably, at least two adjacent grooves are provided such that at least two conductive sealing rings form a parallel structure. The overall resistance is reduced by the parallel connection of at least two conductive sealing rings.

[0008] A further improvement of the present invention is that the plug is provided with a claw in the plugging and unplugging direction, and the socket is provided with a slot and a boss in the plugging and unplugging direction; during the insertion process, the claw is lifted up when passing through the boss and falls into the slot when in the plugged position to realize the primary locking of the plug and the socket; when separating the plug and the socket, the claw is pressed to disengage from the slot and slide out along the boss to realize unlocking; the plug is also provided with a locking ring that can rotate around its central axis, and the locking ring is clamped on the insulating outer shell of the plug; the locking ring is provided with a locking cantilever, and by rotating the locking ring, the locking cantilever is overlapped with the claw position of the plug, thereby limiting the claw from disengaging from the slot, thereby realizing the secondary locking function. Compared with the existing locking technology, the secondary locking structure has a coaxial rotation mode and no additional axial operating space is required, so that the connector can achieve a more compact structure, saving the installation layout and operating space of the product in the system, and the operation is simpler and more labor-saving; the limiting area of ​​the secondary locking directly acting on the primary locking position is much larger than the existing technology, and the secondary locking function is more reliable; and the secondary locking has a simpler structure, which is easy to produce and control quality.

[0009] A further improvement of the present invention is that the socket rubber core and the plug rubber core, the jack and the pin, the signal terminal and the signal jack are paired in pairs and guided step by step for plugging. As the plug and the socket are plugged in, the socket rubber core and the plug rubber core are first plugged in and effectively corrected to reduce the axial deviation between the terminals; then the jack and the pin are plugged in, and the axial deviation of the signal terminal is further reduced, so that the signal terminal can be plugged in with a precise axial matching size, thereby avoiding mechanical damage to the signal terminal due to installation tolerance and ensuring the electrical safety of the main circuit power supply after the power terminal is plugged in place through this contact sequence.

[0010] The compact electrical connector of the present invention has high electromagnetic shielding performance and high vibration resistance performance, providing a safer guarantee for the application of new energy vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a front view and a longitudinal cross-sectional schematic diagram of an electrical connector; Figure 2 is a schematic diagram of a transverse cross-section of an electrical connector;

[0012] Figure 3 is a schematic diagram of a locking structure of an electrical connector;

[0013] Figure 4 It is a schematic diagram of the step-by-step guiding structure of the electrical connector;

[0014] Figure 5 It is a schematic diagram of another eccentric structure of an electrical connector;

[0015] Figure 6It is a three-dimensional schematic diagram of the locking structure of the electrical connector.

[0016] The present invention is further described below in conjunction with the accompanying drawings. The following embodiments are only descriptive and not restrictive, and the protection scope of the present invention cannot be limited by these embodiments. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solution of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention. DETAILED DESCRIPTION

[0017] The present invention discloses a compact electric connector with high electromagnetic shielding performance and high vibration resistance performance which can be used in new energy vehicles and mainly consists of a plug and a socket.

[0018] See also Figure 1-2 The electrical connector of the present invention comprises a plug 1 and a socket 2, wherein the plug 1 and the socket 2 are respectively used to connect the cable or busbar end on the side, and the plug 1 is plugged into the socket 2 to realize the circuit connection on both sides. The plug 1 mainly comprises an insulating outer shell 3 and a jack component in an inner shielding shell 4, wherein the jack component has two jacks 5, and the jack 5 has a first chamber 5.1 for accommodating the jack contact, and a second chamber 5.2 for accommodating the cable end, and the conductor part of the cable is crimped in the second chamber 5.2 of the jack 5. The jack 5 of the jack component is sleeved in the shielding inner shell 4 through a plug rubber core 6, and a shielding ring 8 is provided in the inner shielding shell 4, and the shielding ring 8 is crimped on the cable that has been stripped of the outer insulation layer, and the cable passes through the threading hole 9 provided at the tail end of the insulating outer shell 3 to connect with other devices. The socket 2 mainly comprises an insulating outer shell 16 and a pin 14 provided in the shielding inner shell 15. The pin 14 is installed on the socket rubber core 18, and then the socket rubber core 18 is installed on the socket inner shielding shell 15. The inner shielding shell 15 of the plug and the matching installation surface of the equipment are provided with a sealing member 19.

[0019] In the prior art, the axis center lines of the first chamber 5.1, the second chamber 5.2 and the threading hole 9 on the insulating outer shell for the cable to pass through of the plug jack 5 are coaxial. Since the cable usually has a large diameter, it occupies the middle space of the plug and limits the size of the jack. In order to meet the connection requirements of larger-sized cable harnesses, the axis spacing of the jack needs to be increased, which inevitably leads to an overall increase in the overall size of the plug. In order to make the overall structure more compact, the present invention provides an eccentric axis setting scheme. The scheme is as follows: Figure 2As shown, the axis of the jack 5 is eccentrically arranged with respect to the axis of the cable within the wire threading hole 9, such that the axial distance s3 between the cables within the wire threading hole is greater than the distances s1 and s2 between the axes of the first and second chambers of the two jacks 5. The axes of the first chamber 5.1 and the second chamber 5.2 of the two jacks 5 may be coaxially or eccentrically arranged, i.e., s1 = s2 < s3, or s1 < s2 < s3. Alternatively, only the axis of the second chamber 5.2 of the jack 5 and the axis of the first chamber 5.1 of the jack 5 are eccentrically arranged, such that the distance s2 between the axes of the second chambers 5.2 of the two jacks 5 is greater than the distance between the axes of the two first chambers 5.1, i.e., s1 < s2.

[0020] The above improvement of the present invention lies in overcoming the coaxial arrangement of the conventional thinking in the prior art. The axis of the second chamber 5.1 of the jack 5 and the axis of the wire threading hole 9 for the cable within the housing are eccentrically arranged. Through this eccentric arrangement of the axis, the first chamber 5.1 of the jack 5 does not need to be arranged along the axis of the cable with a larger diameter, thereby reducing the occupied space of the terminal in the connector. It enables the connector to accommodate a larger specification cable in a smaller occupied space or occupy a smaller space when using cables of the same specification, and the overall structure is more compact.

[0021] When the socket end is used to connect cable-type electrical contact components, the above eccentric arrangement scheme can also be applied to the socket end. As Figure 2 shown, the pin 14 has a pin head 14.1 and a second chamber 14.2 for accommodating the cable. A hole for the cable to penetrate is provided at the tail end of the socket rubber core 18. The axis of the second chamber 14.2 of the pin 14 and the axis of the pin head 14.1 are eccentrically arranged, such that the distance s5 between the axes of the second chambers 14.2 of the two pins 14 is greater than the distance s4 between the axes of the two pin heads 14.1, i.e., s4 < s5. Alternatively, the axis of the pin head 14.1 and the axis of the cable inserted into the outer housing are eccentrically arranged, such that the distance s6 between the axes of the two cables entering the housing end is greater than the distances s4 and s5 between the axes of the pin head 14.1 and the second chamber 14.2 of the two pins 14. The axes of the pin head 14.1 and the second chamber 14.2 of the pin 14 may be coaxially or eccentrically arranged, i.e., s4 = s5 < s6, or s4 < s5 < s6.

[0022] In order to make the overall structure of the electrical connector more compact and improve its shielding performance, the insulating outer shell 3, 16 of the plug 1 and the socket 2 of the present invention are formed by plastic injection molding, and the shielding inner shell 4, 15 are formed by casting. The insulating outer shell and the inner shielding shell can be tightly combined together to form a composite shell through interference fit, pre-embedded injection molding, ultrasonic welding and other technologies. The composite shell is well balanced and has the advantages of all-plastic shell and all-metal shell. Its insulating outer shell provides insulation protection, integrated fit, corrosion resistance, light weight and other plastic functions; its integrally cast shielding inner shell provides all-round shielding function and greatly enhances the strength of key stress points; when the plug 1 and the socket 2 are plugged in, the outer insulating shell 3 of the plug and the outer insulating shell 16 of the socket can realize the efficient locking function of the plastic connector, and at the same time, the shielding inner shell 4 and the shielding inner shell 15 are docked and overlapped and are subjected to stress first than the plastic shell in a vibration environment, which greatly increases the structural strength of the product.

[0023] The shielding inner shell 4 of the plug 1 of the present invention is provided with a groove 11 for placing a conductive sealing ring 10. When the plug is plugged into the socket, the plug shielding shell 4 and the socket shielding shell 15 are connected through the conductive sealing ring 10 to form a complete 360-degree overall shielding body. In the prior art, shielding springs and ordinary sealing rings that are independently set are mostly used here, but in compact small-diameter connectors, this solution faces the bottleneck of spring process manufacturing, and it is very easy to cause failures such as desoldering and spring coil deformation during the connector plugging process. At the same time, due to the large and uneven deformation force of the spring circumference, it also causes the sealing failure caused by uneven deformation of the sealing ring when used in combination with the sealing ring; the overall structure of the conductive sealing ring used in the present invention can effectively avoid the problem of shielding spring failure, and greatly reduce the plugging and unplugging resistance in the plugging and unplugging operation of the connector, and can adjust the shielding resistance level by selecting the conductive sealing ring 10 according to the shielding resistance requirements. Preferably, at least two adjacent grooves 11 for placing the wire sealing ring 10 are provided, and the overall resistance is reduced by connecting at least two conductive sealing rings in parallel. Similarly, the above-mentioned conductive sealing ring overall structure can also be applied to the shielding inner shell 15 of the socket 2.

[0024] In order to make the overall structure of the electrical connector more compact, the present invention further improves the locking structure of the electrical connector.

[0025] like Figure 1As shown in Figures 3 and 6, the plug 1 of the present invention is provided with a claw 3.1 in the plugging and unplugging direction, and the socket 2 is provided with a slot 16.1 and a first boss 16.2 in the plugging and unplugging direction. During the insertion process, the claw 3.1 is lifted up when passing through the first boss 16.2 and falls into the slot 16.1 when in the plugged position to realize the primary locking of the plug 1 and the socket 2; when separating the plug 1 and the socket 2, the claw 3.1 is released from the slot 16.1 and slides out along the first boss 16.2 by pressing the unlocking cantilever 3.2 of the claw to realize unlocking. The plug 1 is also provided with a locking ring 13 that can rotate around its central axis, and the inner wall of the locking ring 13 is provided with a second boss 13.1 and is clamped on the insulating outer shell 3 through a guide slot 3.10 provided on the insulating outer shell 3 of the plug 1. The guide slot 3.10 is provided with a plurality of ridges 3.7, 3.8, 3.9 to form a locking position chamber 3.3, an unlocking position chamber 3.4, an axial motion slide rail 3.5, and a circumferential motion slide rail 3.6; the second boss 13.1 of the locking ring 13 is pressed into the unlocking position chamber 3.4 after passing through the axial motion slide rail 3.5, at which time the locking cantilever 13.2 of the locking ring and the position of the claw 3.1 of the plug do not overlap, and the first locking and unlocking can be achieved through the cooperation of the claw 3.1 and the slot 16.1, and the secondary locking function is in the unlocking state; by rotating the locking ring 13, the second boss 13.1 is separated from the unlocking position chamber 3.4 and enters the locking position chamber 3.3 after passing through the circumferential motion slide rail 3.6, at which time the locking cantilever 13.2 of the locking ring and the position of the claw 3.1 of the plug form an upper and lower overlapping state, and the warping deformation of the claw 3.1 is limited so that the first locking cannot be unlocked and / or locked, thereby realizing the secondary locking function. Compared with the existing locking technology, the secondary locking structure has a coaxial rotation mode and does not require additional axial operating space, so that the connector can achieve a more compact structure, saving the installation layout and operating space of the product in the system; and the operation is simpler and more labor-saving; the limiting area of ​​the secondary locking directly acting on the primary locking position is much larger than the existing technology, and the secondary locking function is more reliable; and the secondary locking has a simpler structure, which is easy to produce and control quality.

[0026] like Figure 4As shown in the figure, the present invention is provided with signal terminals 12 on the plug rubber core 6 to provide the mating position state of the connector plug 1 and the socket 2. Since the signal terminals usually have a relatively small diameter and thus weak mechanical strength, they are extremely likely to be damaged in the case where the axis of the jack is not concentric with the axis of the female terminal. Preferably, the present invention provides a step-by-step guiding structure, enabling effective alignment of each level of terminals and avoiding damage. As shown in the figure, the socket rubber core 18 and the plug rubber core 6, the jack 5 and the pin 14, and the signal terminal 12 and the signal jack 17 are respectively paired and inserted. The mating contact end face of the socket pin 14 is located at the rear of the end face of the socket rubber core, the mating contact end face of the plug jack 5 is located at the rear of the plug rubber core 6, the mating contact end face of the signal terminal 12 is located at the rear of the plug jack 5, and the mating contact end face of the signal jack 17 is located at the rear of the socket pin 14. After the plug 1 and the socket 2 are effectively mated for a distance L0, the distance between the end face of the plug rubber core 6 and the end face of the socket rubber core 18 is L1; the mating travel of the jack 5 and the pin 14 is L2; the mating travel of the signal terminal 12 and the signal jack 17 is L3. In the present invention, the travel relationship L1 < L2 < L3 is quantitatively defined, and preferably L2 - L1 > 0.2 times of L1, and L3 - L2 > 0.2 times of L2. As the plug 1 and the socket 2 are mated, the socket rubber core 18 and the plug rubber core 6 are first mated and effectively aligned to reduce the axial deviation between the terminals; then the jack 5 and the pin 14 are mated, and the axial deviation between the signal terminal 12 and the signal jack 17 is further reduced, enabling the signal terminals to be inserted in a precise axial mating dimension, thus avoiding mechanical damage to the signal terminal 12 caused by installation tolerance and ensuring the electrical safety of the main circuit power supply after the power terminals are inserted in place through this contact sequence.

Claims

1. A compact electrical connector, comprising a plug (1) and a socket (2), wherein the plug (1) comprises an insulating outer shell (3) and a socket component arranged in a shielding inner shell (4), wherein the socket component has at least two sockets (5), wherein the socket (5) has a first chamber (5.1) for accommodating a pin contact, and a second chamber (5.2) for accommodating an end of a cable, and a threading hole (9) is arranged at the rear end of the insulating outer shell (3) for the cable to be inserted; characterized in that: The axis of the second chamber (5.2) of the socket (5) is eccentrically arranged with respect to the axis of the first chamber (5.1), such that the distance s2 between the axes of the second chambers (5.2) is greater than the distance s1 between the axes of the first chambers (5.1), i.e., s1 < s2; or the axis of the socket (5) is eccentrically arranged with respect to the axis of the cable in the wire threading hole (9), such that the distance s3 between the axes of the cables in the wire threading hole is greater than the distances s1 and s2 between the axes of the first and second chambers of the socket (5), wherein the axes of the first chamber (5.1) and the second chamber (5.2) of the socket (5) are coaxially or eccentrically arranged, i.e., s1 = s2 < s3 or s1 < s2 < s3.

2. The electrical connector according to claim 1, wherein: The insulating outer housings (3, 16) of the plug (1) and the socket (2) are formed by plastic injection molding, the shielding inner housings (4, 15) are formed by casting, and the insulating outer housings (3, 16) and the shielding inner housings (4, 15) are tightly combined together by interference fit, insert molding or ultrasonic welding to form a composite housing.

3. The electrical connector according to claim 2, characterized in that: Grooves (11) are provided on the shielding inner housings (4, 15) of the plug (1) and the socket (2) for placing conductive sealing rings (10).

4. The electrical connector according to claim 3, characterized in that: At least two adjacent grooves are provided such that at least two conductive sealing rings form a parallel structure.

5. The electrical connector according to claim 1, wherein: The plug (1) is provided with a claw (3.1) in the insertion and extraction direction, the socket (2) is provided with a slot (16.1) and a first boss (16.2) in the insertion and extraction direction; during the insertion process, the claw (3.1) is lifted when passing through the first boss (16.2) and falls into the slot (16.1) at the mating position to achieve primary locking of the plug (1) and the socket (2); when separating the plug (1) and the socket (2), the unlocking cantilever (3.2) of the claw (3.1) is pressed to disengage it from the slot (16.1) and slide out along the first boss (16.2) to achieve unlocking; the plug (1) is further sleeved with a locking ring (13) that can rotate around its central axis, and the locking ring (13) is snap-fitted on the insulating outer housing (3) of the plug (1); the locking ring (13) is provided with a locking cantilever (13.2), and by rotating the locking ring (13), the locking cantilever (13.2) is overlapped with the position of the claw (3.1) of the plug, thereby restricting the claw (3.1) from disengaging from the slot (16.1) to achieve the secondary locking function.

6. The electrical connector according to claim 5, characterized in that The inner wall of the locking ring (13) is provided with a second boss (13.1), and it is snap-fitted on the insulating outer housing (3) of the plug (1) through a guiding slot (3.10) provided on the insulating outer housing (3); the guiding slot (3.10) forms a locking position chamber (3.3), an unlocking position chamber (3.4), an axial movement slide rail (3.5), and a circumferential movement slide rail (3.6); the second boss (13.1) of the locking ring (13) is pressed into the unlocking position chamber (3.4) through the axial movement slide rail (3.5). At this time, the locking cantilever (13.2) of the locking ring does not overlap with the claw (3.1) of the plug. The first locking and unlocking can be realized through the cooperation of the claw (3.1) and the slot (16.1), and the second locking function is in the unlocked state; by rotating the locking ring (13), the second boss (13.1) disengages from the unlocking position chamber (3.4) and enters the locking position chamber (3.3) through the circumferential movement slide rail (3.6). At this time, the locking cantilever (13.2) of the locking ring and the claw (3.1) of the plug are in an up-and-down overlapping state to realize the second locking.

7. The electrical connector according to claim 1, characterized in that: The jack (5) of the plug (1) is sleeved in the shielding inner housing (4) through the plug rubber core (6). A signal terminal (12) is installed on the plug rubber core (6). The pin (14) of the socket (2) is sleeved in the shielding inner housing (15) through the socket rubber core (18). A signal jack (17) is provided on the socket rubber core (18). The plugging of the signal terminal (12) and the signal jack (17) provides the plugging position state of the connector plug (1) and the socket (2); the plug rubber core (6) and the socket rubber core (18), the jack (5) and the pin (14), and the signal terminal (12) and the signal jack (17) are paired in pairs and inserted in a step-by-step guiding manner.

8. The electrical connector according to claim 7, characterized in that: The plugging contact end face of the socket pin (14) is located at the rear of the end face of the socket rubber core (18). The plugging contact end face of the plug jack (5) is located at the rear of the plug rubber core (6). The plugging contact end face of the signal terminal (12) is located at the rear of the plug jack (5). The plugging contact end face of the signal jack (17) is located at the rear of the socket pin (14). After the plug (1) and the socket (2) are effectively plugged for a distance L0, the distance between the end face of the socket rubber core (18) and the end face of the plug rubber core (6) is L1; the plugging stroke of the jack (5) and the pin (14) is L2; the plugging stroke of the signal terminal (12) and the signal jack (17) is L3. Among them, Ll < L2 < L3 to achieve step-by-step guiding.

9. The electrical connector according to claim 8, characterized in that: L2 - L1 > 0.2L1, L3 - L2 > 0.2L2.

10. A compact electrical connector, comprising a plug (1) and a socket (2), wherein the socket (2) comprises an insulating outer shell (16) and at least two pins (14) arranged in a shielding inner shell (15); the pins (14) have a pin head (14.1) and a second chamber (14.2) for accommodating an electrical contact, and a hole for inserting a power supply contact is arranged at the rear end of the insulating outer shell (16); the characteristics are: The axis of the second chamber (14.2) and the axis of the needle tip (14.1) are eccentrically arranged, so that the distance s5 between the axes of the second chamber (14.2) is greater than the distance s4 between the axes of the needle tip (14.1), that is, s4 < s5; or the axis of the pin (14) and the axis of the electrical contact member inserted into the through hole are eccentrically arranged, so that the distance s6 between the axes of the electrical contact members is greater than the distance s4 between the axes of the needle tip (14.1) of the pin (14). Among them, the axis of the needle tip (14.1) of the pin (14) and the axis of the second chamber (14.2) are coaxially or eccentrically arranged, that is, s4 = s5 < s6, or s4 < s5 < s6.

11. The electrical connector according to claim 10, characterized in that The insulating outer shells (3, 16) of the plug (1) and the socket (2) are formed by plastic injection molding, the shielding inner shells (4, 15) are formed by casting, and the insulating outer shells (3, 16) and the shielding inner shells (4, 15) are tightly combined together by interference fit, embedded injection molding or ultrasonic welding to form a composite shell.

12. The electrical connector according to claim 11, characterized in that: Grooves (11) are provided on the shielding inner shells (4, 15) of the plug (1) and the socket (2) for placing conductive sealing rings (10).

13. The electrical connector according to claim 12, characterized in that: At least two adjacent grooves are provided so that at least two conductive sealing rings form a parallel structure.

14. The electrical connector according to claim 10, wherein: The plug (1) is provided with a claw (3.1) in the plugging and unplugging direction, and the socket (2) is provided with a slot (16.1) and a first boss (16.2) in the plugging and unplugging direction; during the insertion process, the claw (3.1) is lifted when passing through the first boss (16.2) and falls into the slot (16.1) at the mating position to achieve the primary locking of the plug (1) and the socket (2); when separating the plug (1) and the socket (2), by pressing the unlocking cantilever (3.2) of the claw (3.1), it is disengaged from the slot (16.1) and slides out along the first boss (16.2) to achieve unlocking; the plug (1) is also sleeved with a locking ring (13) that can rotate around its central axis, and the locking ring (13) is clamped on the insulating outer shell (3) of the plug (1); the locking ring (13) is provided with a locking cantilever (13.2), and by rotating the locking ring (13), the locking cantilever (13.2) is overlapped with the position of the claw (3.1) of the plug, so as to limit the claw (3.1) from disengaging from the slot (16.1) and achieve the secondary locking function.

15. The electrical connector according to claim 14, characterized in that The inner wall of the locking ring (13) is provided with a second boss (13.1), and it is snap-fitted on the insulating outer housing (3) of the plug (1) through a guiding slot (3.10) provided on the insulating outer housing (3); the guiding slot (3.10) forms a locking position chamber (3.3), an unlocking position chamber (3.4), an axial movement slide rail (3.5), and a circumferential movement slide rail (3.6); the second boss (13.1) of the locking ring (13) is pressed into the unlocking position chamber (3.4) through the axial movement slide rail (3.5). At this time, the locking cantilever (13.2) of the locking ring does not overlap with the claw (3.1) of the plug. The primary locking and unlocking can be achieved through the cooperation of the claw (3.1) and the slot (16.1), and the secondary locking function is in the unlocked state; by rotating the locking ring (13), the second boss (13.1) disengages from the unlocking position chamber (3.4) and enters the locking position chamber (3.3) through the circumferential movement slide rail (3.6). At this time, the locking cantilever (13.2) of the locking ring and the claw (3.1) of the plug are in an up-and-down overlapping state, realizing secondary locking.

16. The electrical connector according to claim 10, characterized in that The jack (5) of the plug (1) is sleeved inside the shielding inner housing (4) through a plug rubber core (6). A signal terminal (12) is installed on the plug rubber core (6). The pin (14) of the socket (2) is sleeved inside the shielding inner housing (15) through a socket rubber core (18). A signal jack (17) is provided on the socket rubber core (18). The plugging of the signal terminal (12) and the signal jack (17) provides the plugging position state of the connector plug (1) and the socket (2); the plug rubber core (6) and the socket rubber core (18), the jack (5) and the pin (14), and the signal terminal (12) and the signal jack (17) are paired two by two and are inserted in a step-by-step guiding manner.

17. The electrical connector according to claim 16, characterized in that: The plugging contact end face of the pin (14) of the socket is located at the rear of the end face of the socket rubber core (18). The plugging contact end face of the plug jack (5) is located at the rear of the plug rubber core (6). The plugging contact end face of the signal terminal (12) is located at the rear of the plug jack (5). The plugging contact end face of the signal jack (17) is located at the rear of the socket pin (14). After the plug (1) and the socket (2) are effectively plugged for a distance L0, the distance between the end face of the socket rubber core (18) and the end face of the plug rubber core (6) is L1; the plugging stroke of the jack (5) and the pin (14) is L2; the plugging stroke of the signal terminal (12) and the signal jack (17) is L3. Among them, Ll < L2 < L3 to achieve step-by-step guiding.

18. The electrical connector according to claim 17, characterized in that: L2 - L1 > 0.2L1, L3 - L2 > 0.2L2.

19. An electric vehicle comprising the electrical connector according to any one of claims 1 - 18.

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