Multi-core metal shell electric connector

Abstract

The utility model relates to a multi-core metal shell electric connector, and belongs to the technical field of new energy automobile power connectors, the metal shell electric connector comprises a plug and a socket, a jack terminal and a first conversion terminal of the plug are respectively fixed at two ends of a first metal shell, a rotating spring contact piece is arranged in the jack terminal, and a second conversion terminal is arranged in the first metal shell. The rotating spring contact piece is made of high-conductivity materials, the pin terminal and the second conversion terminals are fixed to the two ends of the second metal shell respectively, the pin terminal is inserted into the jack terminal and makes contact with the rotating spring contact piece, the lengths of the multiple second conversion terminals of the socket are different, and the multiple installation holes are distributed in a staggered mode. According to the multi-core metal shell electric connector, the rotating spring contact piece is made of a high-conductivity material, low resistance, high current transmission capacity and transmission stability are ensured, the rotating spring contact piece has multiple contacts and has good contact stability and reliability, parts electrically connected with the second conversion terminals can be stacked, and the number of the second conversion terminals is small. The space utilization rate is improved.

Description

Technical Field

[0001] The present application relates to the technical field of power connectors for new energy vehicles, and in particular to a multi-core metal shell electrical connector. Background Art

[0002] An electrical connector is a device used for electrical connection, whose main function is to provide reliable electrical connection and transmit current and signals. In the existing technology, with the continuous development and application of high-power electronic equipment in the field of new energy vehicles, the demand for high-performance connectors is also continuously growing. On the one hand, in the connection of high-power electronic equipment, the impedance of existing electrical connectors is relatively large, resulting in reduced current transmission efficiency and severe energy loss. At the same time, it also causes heat, causing excessive temperature rise, affecting the stability and reliability of the equipment. On the other hand, when the electrical connector has a multi-core structure, the connection of the electrical connector has the problem of occupying a large space. Utility Model Content

[0003] Based on this, it is necessary to provide a multi-core metal shell electrical connector to solve the technical problems of high impedance and large space occupied by electrical connectors in the prior art.

[0004] To achieve the above objectives, the present application provides a multi-core metal shell electrical connector, the multi-core metal shell electrical connector comprising:

[0005] A plug comprising a first metal shell, a plurality of socket terminals, and a plurality of first adapter terminals, the number of which matches the number of the plurality of socket terminals. The first metal shell forms a first channel. The socket terminals and the first adapter terminals are respectively fixed at two ends of the first channel. A rotating spring contact is provided in the socket terminal. The rotating spring contact is made of a highly conductive material. The socket terminal and the first adapter terminal are electrically connected together. An end of the first adapter terminal away from the socket terminal is used for connecting to a cable.

[0006] The socket includes a second metal shell, a plurality of pin terminals having the same number as the plurality of socket terminals, and a plurality of second adapter terminals having the same number as the plurality of socket terminals. The second metal shell forms a second channel. The pin terminals and the second adapter terminals are respectively fixed at both ends of the second channel. The pin terminals can be inserted into the socket terminals and contact the rotating spring contact pieces. The pin terminals and the second adapter terminals are electrically connected together. Ends of the plurality of second adapter terminals away from the pin terminals all protrude from the second metal shell. Parts of the plurality of second adapter terminals protruding from the second metal shell are all provided with mounting holes. The mounting holes extend along the arrangement direction of the plurality of second adapter terminals. The lengths of the parts of the plurality of second adapter terminals protruding from the second metal shell are all inconsistent, so that the plurality of mounting holes are staggered.

[0007] Optionally, the first metal shell includes a shell front section and a shell rear section, the shell front section and the shell rear section are arranged at an angle, the jack terminal is arranged in the shell front section, and the first adapter terminal is arranged in the shell rear section.

[0008] Optionally, the plug also includes a limit member, which is arranged at the connection between the front section of the shell and the rear section of the shell. The part of the limit member corresponding to the front section of the shell is provided with a first limit hole adapted to the jack terminal, and the part of the limit member corresponding to the rear section of the shell is provided with a second limit hole adapted to the first adapter terminal. The first limit hole and the second limit hole are connected together.

[0009] Optionally, a stud is provided at one end of the jack terminal corresponding to the first adapter terminal, and the first adapter terminal is provided with an avoidance hole for avoiding the stud. The plug also includes a nut adapted to the stud, and the nut is screwed onto the nut to fasten the end face of the jack terminal to the side face of the first adapter terminal.

[0010] Optionally, the plug further comprises:

[0011] An inner pressure ring is provided at a port of the first metal shell corresponding to the first transfer terminal;

[0012] An outer pressure ring is sleeved on the inner pressure ring, and a shielding layer of the cable is squeezed and sandwiched between the inner and outer pressure rings; and

[0013] A plurality of shielding contact pieces are arranged in the first metal shell. When the plug and the socket are plugged together, the shielding contact pieces connect the first metal shell and the second metal shell together.

[0014] Optionally, the plug further includes a first sealing ring disposed in the first metal shell, and the first sealing ring is squeezed and clamped between the first metal shell and the cable.

[0015] Optionally, the plug further comprises:

[0016] a tail cover, which is provided on the port of the first metal shell corresponding to the first transfer terminal, and is provided with a through hole for adapting the cable; and

[0017] The claw is arranged in the tail cover and is used to clamp the cable.

[0018] Optionally, the first transfer terminal and the cable are connected by ultrasonic welding.

[0019] Optionally, the first metal shell and the second metal shell are both made of aluminum alloy.

[0020] Optionally, a first protective rubber core is provided between the first metal shell and the jack terminal, a second protective rubber core is provided between the second metal shell and the pin terminal, a second sealing ring is squeezed and clamped between the second metal shell and the second protective rubber core, and a third sealing ring is squeezed and clamped between the second protective rubber core and the pin terminal.

[0021] The beneficial effects of the multi-core metal shell electrical connector provided by the present application are as follows: compared with the prior art, the multi-core metal shell electrical connector of the present application includes a plug and a socket, the plug includes a first metal shell, a socket terminal and a first adapter terminal, the socket includes a second metal shell, a pin terminal and a second adapter terminal, the pin terminal contacts the rotating spring contact piece, the rotating spring contact piece is made of a high conductivity material, ensuring low resistance and high current transmission capability and transmission stability, realizing high-power transmission of high voltage and large current, reducing connection impedance, and the rotating spring contact piece has more contact points, has good contact stability and reliability, and can withstand frequent plugging and unplugging and vibration; at the same time, the lengths of the multiple second adapter terminals of the socket are inconsistent, the multiple mounting holes can be staggered, and the multiple components electrically connected to the multiple second adapter terminals in sequence can be stacked, thereby improving space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A schematic diagram of the three-dimensional structure of a multi-core metal shell electrical connector provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of the exploded structure of a plug of a multi-core metal shell electrical connector provided in an embodiment of the present application;

[0025] Figure 3 Schematic diagram of the exploded structure of the socket of the multi-core metal shell electrical connector provided in an embodiment of the present application.

[0026] Description of reference numerals:

[0027] 1. Plug; 101. First metal shell; 1011. Shell front section; 1012. Shell rear section; 1013. Buckle; 102. Jack terminal; 103. First adapter terminal; 1031. Avoidance hole; 104. Limiting member; 1041. First limiting hole; 105. Stud; 106. Nut; 107. Inner pressure ring; 108. Outer pressure ring; 109. Shielding contact piece; 110. First sealing ring; 111. Tail cover; 1111. Slot; 112. Claw; 113. First protective rubber core;

[0028] 2. Socket; 201. Second metal shell; 202. Pin terminal; 203. Second adapter terminal; 2031. Mounting hole; 204. Second protective rubber core; 205. Second sealing ring; 206. Third sealing ring;

[0029] 3. Cables. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0033] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0036] The embodiment of the present application provides a multi-core metal shell electrical connector, please refer to Figures 1 to 3 The multi-core metal shell electrical connector includes a plug 1 and a socket 2. The plug 1 includes a first metal shell 101, a plurality of socket terminals 102, and a plurality of first adapter terminals 103 whose number is the same as the plurality of socket terminals 102. The first metal shell 101 forms a first channel. The socket terminals 102 and the first adapter terminals 103 are respectively fixed at the two ends of the first channel. A rotating spring contact is provided in the socket terminal 102. The rotating spring contact is made of a high-conductivity material. The socket terminal 102 and the first adapter terminal 103 are electrically connected together. The end of the first adapter terminal 103 away from the socket terminal 102 is used to connect to the cable 3.

[0037] The socket 2 includes a second metal shell 201, a plurality of pin terminals 202 having the same number as the plurality of socket terminals 102, and a plurality of second adapter terminals 203 having the same number as the plurality of socket terminals 102. The second metal shell 201 is formed with a second channel. The pin terminals 202 and the second adapter terminals 203 are respectively fixed at both ends of the second channel. The pin terminals 202 can be inserted into the socket terminals 102 and contact the rotating spring contact piece. The pin terminals 202 and the second adapter terminals 203 are electrically connected together. The ends of the plurality of second adapter terminals 203 away from the pin terminals 202 all protrude from the second metal shell 201. The portions of the plurality of second adapter terminals 203 protruding from the second metal shell 201 are all provided with mounting holes 2031. The mounting holes 2031 extend along the arrangement direction of the plurality of second adapter terminals 203. The lengths of the portions of the plurality of second adapter terminals 203 protruding from the second metal shell 201 are all inconsistent, so that the plurality of mounting holes 2031 are staggered.

[0038] Specifically, the material of the rotary spring contact is copper or silver, which has certain structural strength and excellent electrical conductivity.

[0039] Illustratively, the metal shell electrical connector of the embodiment of the present application is a two-core metal shell electrical connector, wherein the plug 1 has two socket terminals 102 and two first adapter terminals 103 , and the socket 2 has two pin terminals 202 and two second adapter terminals 203 .

[0040] It is understandable that in other embodiments, the metal shell electrical connector may also have three cores, four cores, or other larger numbers, which is not limited here.

[0041] In an embodiment of the present application, the multi-core metal shell electrical connector includes a plug 1 and a socket 2. The plug 1 includes a first metal shell 101, a jack terminal 102 and a first adapter terminal 103. The socket 2 includes a second metal shell 201, a pin terminal 202 and a second adapter terminal 203. The pin terminal 202 contacts the rotary spring contact. The rotary spring contact is made of a high-conductivity material to ensure low resistance and high current transmission capability and transmission stability, realize high-power transmission of high voltage and large current, reduce connection impedance, and the rotary spring contact has more contacts, good contact stability and reliability, and can withstand frequent plugging and unplugging and vibration.

[0042] At the same time, the lengths of the multiple second adapter terminals 203 of the socket 2 are inconsistent, the multiple mounting holes 2031 can be staggered, and the mounting holes 2031 extend along the arrangement direction of the multiple second adapter terminals 203. The multiple components electrically connected to the multiple second adapter terminals 203 in sequence are also arranged along the arrangement direction of the multiple second adapter terminals 203, and the various components can be stacked to improve space utilization.

[0043] In one embodiment, see Figure 2 The first metal shell 101 includes a shell front section 1011 and a shell rear section 1012 , the shell front section 1011 and the shell rear section 1012 are set at an angle, the jack terminal 102 is set in the shell front section 1011 , and the first adapter terminal 103 is set in the shell rear section 1012 .

[0044] In this way, the plug 1 is arranged in a bend, and its overall volume is not too long, which saves assembly space for it and the socket 2.

[0045] Exemplarily, the front section 1011 of the shell and the rear section 1012 of the shell are arranged vertically.

[0046] In other embodiments, the angle between the front section 1011 of the shell and the rear section 1012 of the shell may also be 30°, 45°, 60° or other angles, which can be selected according to actual assembly needs and is not limited here.

[0047] In one embodiment, see Figure 2 The plug 1 also includes a limiting member 104, which is arranged at the connection between the front section 1011 of the shell and the rear section 1012 of the shell. The portion of the limiting member 104 corresponding to the front section 1011 of the shell is provided with a first limiting hole 1041 adapted to the jack terminal 102, and the portion of the limiting member 104 corresponding to the rear section 1012 of the shell is provided with a second limiting hole adapted to the first adapter terminal 103. The first limiting hole 1041 and the second limiting hole are connected together.

[0048] Through the above arrangement, the jack terminal 102 is fixed to the first limiting hole 1041, the first adapter terminal 103 is fixed to the second limiting hole, and the limiting member 104 limits the jack terminal 102 and the first adapter terminal 103 to be installed in the first metal shell 101. The jack terminal 102 and the first adapter terminal 103 will not move easily, thereby improving the stability of the assembly.

[0049] Furthermore, in order to prevent electrical interference between the jack terminal 102 and the first adapter terminal 103 and the first metal shell 101 , the limiting member 104 is made of insulating material.

[0050] Exemplarily, the jack terminal 102 is a cylindrical structure, the first limiting hole 1041 is a circular hole, the first adapter terminal 103 is a plate-shaped structure, and the second limiting hole is a rectangular hole.

[0051] In one embodiment, see Figure 2A stud 105 is provided at one end of the jack terminal 102 corresponding to the first adapter terminal 103, and the first adapter terminal 103 is provided with an avoidance hole 1031 for avoiding the stud 105. The plug 1 also includes a nut 106 adapted to the stud 105, and the nut 106 is screwed onto the nut 106 to fasten the end face of the jack terminal 102 to the side face of the first adapter terminal 103.

[0052] In this way, the stud 105 and the nut 106 can realize both a vertical connection between the jack terminal 102 and the first adapter terminal 103 and a detachable connection between the jack terminal 102 and the first adapter terminal 103 , which makes installation and disassembly more convenient.

[0053] It is understandable that the existing shielding layer contact pieces are usually end-face contacts, which may cause electromagnetic interference and affect the normal operation of other electronic equipment.

[0054] In one embodiment, see Figure 2 The plug 1 also includes an inner pressure ring 107, an outer pressure ring 108 and a plurality of shielding contact pieces 109. The inner pressure ring 107 is arranged at the port of the first metal shell 101 corresponding to the first adapter terminal 103, and the outer pressure ring 108 is sleeved on the inner pressure ring 107. The shielding layer of the cable 3 is squeezed and sandwiched between the inner pressure ring 107 and the outer pressure ring 108; the plurality of shielding contact pieces 109 are arranged in the first metal shell 101. When the plug 1 and the socket 2 are plugged together, the shielding contact pieces 109 connect the first metal shell 101 and the second metal shell 201 together.

[0055] On the one hand, both the plug 1 and the socket 2 use metal shells to effectively shield electromagnetic interference; on the other hand, the shielding layer of the cable 3 is compressed and connected by the outer pressure ring 108 and the inner pressure ring 107, the outer pressure ring 108 contacts the first metal shell 101, and then the first metal shell 101 and the second metal shell 201 are short-circuited through the shielding contact piece 109, achieving 360° EMC shielding with good shielding effect.

[0056] In one embodiment, see Figure 2 The plug 1 also includes a first sealing ring 110 arranged in the first metal shell 101. The first sealing ring 110 is squeezed and clamped between the first metal shell 101 and the cable 3, thereby achieving a seal between the first metal shell 101 and the cable 3 and preventing external liquid or dust from entering the first metal shell 101.

[0057] In one embodiment, see Figure 2 The plug 1 further includes a first sealing ring 110 disposed in the first metal shell 101 . The first sealing ring 110 is squeezed and clamped between the first metal shell 101 and the cable 3 .

[0058] In one embodiment, see Figure 2 The plug 1 also includes a tail cover 111 and a claw 112. The tail cover 111 is arranged at the port of the first metal shell 101 corresponding to the first adapter terminal 103. The tail cover 111 is provided with a through hole for adapting the cable 3; the claw 112 is arranged in the tail cover 111, and the claw 112 is used to clamp the cable 3.

[0059] In this way, by limiting the position of the cable 3 by the claw 112, the cable 3 can be prevented from being displaced when the cable 3 is bent, thereby preventing an excessive gap from being generated between the port of the first metal shell 101 and the cable 3, thereby improving the sealing effect between the first metal shell 101 and the cable 3.

[0060] Furthermore, a snap fastener 1013 is provided on the outer peripheral surface of the end of the first metal shell 101, and a slot 1111 adapted to the snap fastener 1013 is provided on the tail cover 111. Through the mutual cooperation between the snap fastener 1013 and the slot 1111, the first metal shell 101 and the tail cover 111 can be quickly installed or disassembled.

[0061] In one embodiment, the first adapter terminal 103 and the cable 3 are connected by ultrasonic welding. Ultrasonic welding does not melt metal and can maintain the original properties of the metal, such as strength and conductivity. The metal after welding has good conductivity and low resistivity.

[0062] In one embodiment, the first metal shell 101 and the second metal shell 201 are both made of aluminum alloy, which can withstand large mechanical stress and have good heat dissipation capabilities, and has good waterproof, dustproof and shockproof properties, and can adapt to the complex working environment of new energy vehicles.

[0063] In one embodiment, see Figure 3 A first protective rubber core 113 is provided between the first metal shell 101 and the socket terminal 102, a second protective rubber core 204 is provided between the second metal shell 201 and the pin terminal 202, a second sealing ring 205 is squeezed and sandwiched between the second metal shell 201 and the second protective rubber core 204, and a third sealing ring 206 is squeezed and sandwiched between the second protective rubber core 204 and the pin terminal 202.

[0064] In this way, through the cooperation between the second sealing ring 205 and the third sealing ring 206, the single-end waterproofing of the socket 2 can be achieved, which can prevent moist air from entering the chassis from the socket 2 before the plug 1 is inserted to form condensation, thereby avoiding product leakage.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A multi-core metal shell electrical connector, characterized in that: include: A plug comprising a first metal shell, a plurality of socket terminals, and a plurality of first adapter terminals, the number of which matches the number of the plurality of socket terminals. The first metal shell forms a first channel, the socket terminals and the first adapter terminals are respectively fixed at two ends of the first channel, a rotating spring contact is provided in the socket terminal, and the rotating spring contact is made of a high-conductivity material. The socket terminal and the first adapter terminal are electrically connected together, and an end of the first adapter terminal away from the socket terminal is used for connecting to a cable. as well as The socket includes a second metal shell, a plurality of pin terminals having the same number as the plurality of socket terminals, and a plurality of second adapter terminals having the same number as the plurality of socket terminals. The second metal shell forms a second channel. The pin terminals and the second adapter terminals are respectively fixed at both ends of the second channel. The pin terminals can be inserted into the socket terminals and contact the rotating spring contact members. The pin terminals and the second adapter terminals are electrically connected together. Ends of the plurality of second adapter terminals away from the pin terminals all protrude from the second metal shell. Parts of the plurality of second adapter terminals protruding from the second metal shell are all provided with mounting holes. The mounting holes extend along the arrangement direction of the plurality of second adapter terminals. The lengths of the parts of the plurality of second adapter terminals protruding from the second metal shell are all inconsistent, so that the plurality of mounting holes are staggered.

2. The multi-core metal shell electrical connector according to claim 1, characterized in that: The first metal shell includes a front shell section and a rear shell section, the front shell section and the rear shell section are arranged at an angle, the jack terminal is arranged in the front shell section, and the first adapter terminal is arranged in the rear shell section.

3. The multi-core metal shell electrical connector according to claim 2, characterized in that: The plug also includes a limiting member, which is arranged at the connection between the front section and the rear section of the shell. The portion of the limiting member corresponding to the front section of the shell is provided with a first limiting hole adapted to the jack terminal, and the portion of the limiting member corresponding to the rear section of the shell is provided with a second limiting hole adapted to the first adapter terminal. The first limiting hole and the second limiting hole are connected together.

4. The multi-core metal shell electrical connector according to claim 3, characterized in that: A stud is provided at one end of the jack terminal corresponding to the first adapter terminal, and the first adapter terminal is provided with an avoidance hole for avoiding the stud. The plug also includes a nut adapted for the stud, and the nut is screwed onto the nut to fasten the end face of the jack terminal to the side face of the first adapter terminal.

5. The multi-core metal shell electrical connector according to any one of claims 1 to 4, characterized in that: The plug further comprises: an inner pressure ring, provided at a port of the first metal shell corresponding to the first transfer terminal; an outer pressure ring, sleeved on the inner pressure ring, with the shielding layer of the cable squeezed and sandwiched between the inner pressure ring and the outer pressure ring; and A plurality of shielding contact pieces are provided in the first metal shell. When the plug and the socket are plugged together, the shielding contact pieces connect the first metal shell and the second metal shell together.

6. The multi-core metal shell electrical connector according to any one of claims 1 to 4, characterized in that: The plug further includes a first sealing ring disposed in the first metal shell, and the first sealing ring is squeezed and clamped between the first metal shell and the cable.

7. The multi-core metal shell electrical connector according to any one of claims 1 to 4, characterized in that: The plug further comprises: a tail cover, which is provided on the port of the first metal shell corresponding to the first transfer terminal, and is provided with a through hole adapted to fit the cable; and A clamping claw is disposed in the tail cover and is used to clamp the cable.

8. The multi-core metal shell electrical connector according to any one of claims 1 to 4, characterized in that: The first transfer terminal and the cable are connected by ultrasonic welding.

9. The multi-core metal shell electrical connector according to any one of claims 1 to 4, characterized in that: The first metal shell and the second metal shell are both made of aluminum alloy.

10. The multi-core metal shell electrical connector according to any one of claims 1 to 4, characterized in that: A first protective rubber core is provided between the first metal shell and the socket terminal, a second protective rubber core is provided between the second metal shell and the pin terminal, a second sealing ring is squeezed and sandwiched between the second metal shell and the second protective rubber core, and a third sealing ring is squeezed and sandwiched between the second protective rubber core and the pin terminal.

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