Male-female opposite direction pin-jack type double-layer clamping connection structure large current connector

Abstract

This invention discloses a high-current connector with a male and female anisotropic pin-socket double-layer snap-fit ​​connection structure, including a male and a female connector, with one end of the female connector inserted into the male connector. The male connector has a double-layer structure, with the inner conductor end being a protruding pin and the outer conductor end being a recessed socket. The female connector also has a double-layer structure, with the inner conductor end being a recessed elastic socket and the outer conductor end being a protruding elastic pin. This connector facilitates the assembly of multilayer boards, enables rapid insertion and removal, significantly improves structural stability, provides high reliability for the floating structure, and reduces maintenance costs. No soldering is required; high-current interconnection between boards can be achieved through the precise snap-fit ​​of the male and female pins and sockets, while also supporting rapid insertion and removal, greatly improving assembly efficiency and ease of subsequent maintenance.

Description

Technical Field

[0001] This invention relates to the field of connector technology, specifically a high-current connector with a male-female anisotropic pin-socket double-layer snap-fit ​​connection structure. Background Technology

[0002] Currently, in the field of high-current board interconnection, existing technologies generally adopt a core connection scheme of "current connector + thick wire" to achieve interlayer power transmission. The specific implementation is as follows: First, the pins of rectangular connectors are soldered to pre-set pads on each layer of the circuit board using manual or semi-automatic soldering processes, forming fixed connection points at the board ends. Then, single or multiple thick-gauge copper core wires (with a cross-sectional area typically not less than 4mm² to stably carry high current) are used to interconnect the rectangular connectors on each layer in series or parallel. The ends of the wires are also fixed to the connector terminals using soldering. In some scenarios, the wires and terminals are tin-plated or silver-plated to reduce contact resistance. In scenarios requiring blind mating or installation error compensation, this solution lacks a dedicated guiding and floating structure, requiring additional external guide posts for initial positioning. Furthermore, axial / radial deviation compensation still relies on spring components, and the overall structure lacks integrated design.

[0003] This results in the following defects in the existing technology: 1. Multilayer board assembly is cumbersome and extremely inefficient: When interconnecting multilayer boards, rectangular connectors need to be soldered and fixed one by one at the corresponding position on each layer board, and then interconnected by soldering multiple thick wires in sequence. Thick wires are rigid and have poor wiring flexibility, and sufficient space needs to be reserved for soldering operations, resulting in cumbersome assembly steps and long time consumption, which cannot meet the needs of automated assembly. 2. Inability to achieve quick plugging and unplugging, resulting in high maintenance costs: The connectors and circuit boards, as well as the wires and connectors, are all fixed by soldering, which is a non-detachable connection. When the equipment malfunctions, the solder joints must be removed with professional tools before repair or replacement of parts can be carried out. The repair process is prone to damaging the circuit board pads and surrounding components. Moreover, after the repair, it is necessary to resolder and debug, which not only makes the repair difficult and time-consuming, but also reduces the reliability of the equipment's secondary assembly. 3. Connection stability is greatly affected by the process: Welding quality directly determines connection reliability. Manual welding is prone to problems such as cold solder joints, bridging and short circuits. Under harsh environments such as vibration and high and low temperature cycles, solder joints are prone to aging and falling off, resulting in interruption of current transmission. At the same time, the welding point between the thick wire and the connector is a stress concentration point. Long-term use is prone to solder joint cracking due to wire shaking, further reducing connection stability. 4. Insufficient conductivity adaptability: Although the large current transmission requirement is met by using thick wires, the contact resistance at the weld is easily affected by process fluctuations. In addition, the presence of thick wires increases the impedance of the current transmission path, resulting in a large amount of heat generation during transmission, which affects the overall heat dissipation performance of the equipment. Long-term full-load operation can easily accelerate the aging of components. Summary of the Invention

[0004] The purpose of this invention is to overcome the problems mentioned in the background art and provide a high-current connector with a male and female anisotropic pin-socket double-layer snap-fit ​​connection structure. This connector can meet the requirements of convenient assembly of multilayer boards, realize quick insertion and removal, significantly improve structural stability, have high reliability of floating structure, and low maintenance cost.

[0005] The objective of this invention is mainly achieved through the following technical solutions: This high-current connector features a male and female anisotropic pin-and-socket dual-layer engaging connection structure, comprising a male and a female connector, with the female end inserted into the male. The connector employs an anisotropic pin-and-socket structure, consisting of two mating ends, a male and a female. Both ends utilize a double-layer conductor design, with the double conductors working together to achieve conductivity and engagement. The two layers are coaxially arranged, independently molded, and do not interfere with each other. This structure facilitates the assembly of multilayer boards, enables rapid insertion and removal, significantly improves structural stability, provides high reliability for the floating structure, and reduces maintenance costs.

[0006] Furthermore, the end of the male connector furthest from the circuit board has a double-layer structure, with the inner conductor end being a protruding pin and the outer conductor end being a recessed socket; both ends of the female connector have a double-layer structure, with the inner conductor end being a recessed flexible socket and the outer conductor end being a protruding flexible pin; the protruding flexible pin of the female connector is inserted into the recessed socket of the male connector, and the protruding pin of the male connector is inserted into the recessed flexible socket of the female connector.

[0007] The male connector uses an "inner pin + outer socket" design: the inner conductor end is a protruding pin, and the outer conductor end is a recessed socket. The female connector uses a "flexible inner socket + flexible outer pin" anisotropic adaptation design: the inner conductor end is a recessed flexible socket, and the outer conductor end is a protruding flexible pin. All pins and sockets on the female connector have elastic deformation capabilities in both the inner and outer sockets. The male connector's pins and sockets have a rigid basic structure, achieving elastic contact through cooperation with the female connector's elastic structure. There are two connection methods: via connection and escapement connection. The via connection has lower insertion and extraction force than the escapement connection, allowing for simultaneous use of via and escapement connections on opposite sides of the board. When the boards are separated, the connector is always on the escapement side. Both connection methods ensure smooth connection and stable contact, adapting to high current transmission requirements. Meanwhile, the body length of the male and female connectors can be flexibly adjusted according to the user's actual board spacing height requirements. By adapting conductor bodies of different lengths, precise adaptation to different board spacing scenarios can be achieved, improving the versatility of the solution.

[0008] During docking, the male and female connectors precisely fit and engage via opposite pins and sockets—the inner pin of the male connector inserts into the flexible inner socket of the female connector, while the outer socket of the male connector engages with the flexible outer pin of the female connector. During docking, the flexible inner socket and the flexible outer pin of the female connector undergo elastic deformation, generating a stable pre-tightening force. This ensures a tight fit between the pins and sockets of the male and female connectors and also achieves a stable conductive connection with the docking components on both sides, forming a dual redundant conductive path to ensure the stability of high-current transmission.

[0009] Furthermore, the height of the outer conductor end face of both the male and female connectors is higher than the height of the inner conductor end face, forming an axial layer difference. A radial guide cone surface is designed at the outer socket port of the male connector, and an auxiliary guide slope surface is designed at the inner pin port of the male connector. The outer pin port of the female connector matches the guide cone surface design of the outer socket of the male connector, and the inner pin port of the female connector matches the guide slope surface design of the inner pin of the male connector. Together, they assist in the precise alignment of the pin and the socket, improving the ease of assembly.

[0010] This structure supports experimental blind insertion. During blind insertion, the outer layer guide cone of the male connector first contacts and initially positions the female connector's elastic outer pin, guided by the layer difference structure to achieve coaxial alignment at both ends. Subsequently, under the action of insertion force, the inner layer pin of the male connector is gradually inserted into the elastic inner hole of the female connector, while the outer layer hole of the male connector simultaneously engages with the elastic outer pin of the female connector. The elastic structure of the female connector deforms and adapts synchronously, completing precise engagement and positioning. The collaborative design of the double-layer layer difference and the opposite pin-hole configuration realizes the blind insertion logic of "outer layer guidance first, inner layer docking later," achieving stable blind insertion operation without the need for external auxiliary positioning devices, and adapting to the convenient assembly requirements of high-current interconnection between multilayer boards.

[0011] Furthermore, the core floating and elastic functions are realized through the elastic structure of the female connector. Both the elastic inner socket and the elastic outer pin of the female connector adopt a variable cross-section design: the elastic outer pin has a large cross-section at the root and high rigidity, a small cross-section in the middle and good elasticity, and a rounded contact head at the end; the inner wall of the elastic inner socket is designed with evenly distributed elastic ribs, and the root cross-section smoothly transitions to the conductor body, possessing excellent elastic recovery capability. The elastic inner socket and the elastic outer pin of the female connector adopt an integrated structural design with root rigidity reinforcement, middle slotting and thinning, and end chamfering guidance. The flexible external pin features a complete and robust root structure with excellent rigidity and support, effectively ensuring overall structural strength and preventing loosening, deformation, or misalignment during long-term insertion and removal. The middle section employs slotting and thinning techniques, creating an elastic deformation zone by reducing local wall thickness. This allows the flexible pin to possess uniform and controllable elastic compression and rebound capabilities, meeting the requirements for fault tolerance and tight fit. A chamfered guide structure at the pin end automatically guides alignment and compensates for slight eccentricity during blind insertion, reducing insertion resistance and improving smoothness. The flexible inner socket features evenly distributed elastic ribs on its inner wall, with a smooth transition between the root and the conductor body, resulting in a stable structure and excellent elastic recovery performance. The male pin and socket are rigid structures, achieving mutual support and stable connection through cooperation with the female's elastic structure. This eliminates the need for additional spring components, simplifying the structure while ensuring reliable high-current transmission.

[0012] It features a stable floating connection function, capable of floating both axially and radially. When floating axially, if there is an axial installation error between the male and female connectors, the elastic deformation of the female connector's elastic inner hole and elastic outer pin can compensate for part of the axial displacement, maintaining stable contact pressure through elastic restoring force. When floating radially, if there is radial eccentricity, the male connector's guiding structure cooperates with the female connector's elastic structure to automatically adjust the contact position through the uneven elastic deformation of the female connector's elastic inner hole and elastic outer pin, compensating for part of the radial deviation. The entire floating process relies entirely on the characteristics of the female connector's elastic structure, simplifying the structure while improving connection reliability in high-current transmission scenarios.

[0013] The male rigid pins / sockets and the female flexible pins / sockets have ample contact area, and the reasonable cross-sectional specifications significantly reduce contact resistance. The nickel-plating and gold-plating treatment of the product improves conductivity and corrosion resistance. The anisotropic pin-socket combination of male and female forms a dual conductive path, ensuring strong overall conductivity and stably meeting the needs of high current transmission while reducing heat generation during transmission. Furthermore, the deformation adaptation of the female flexible structure ensures the continuity of the conductive path, avoids local overheating caused by poor contact, and guarantees long-term stable transmission of high current.

[0014] Furthermore, to meet practical needs, a circuit board may also be included, with the male connectors fixed to the sidewalls of the circuit board.

[0015] In summary, the present invention has the following advantages compared with the prior art: (1) Multilayer board assembly is convenient and quick plug-in / plug-out is achieved: high current interconnection between boards can be completed by precise engagement of male and female pins and sockets, while supporting quick plug-in / plug-out, which greatly improves assembly efficiency and ease of maintenance.

[0016] (2) Significantly improved structural stability: The double-layer interlocking gapless connection structure completely solves the problem of easy aging and falling off of solder joints in the traditional welding scheme, while avoiding the gap problem that may occur in single-layer connection. After multiple insertion and removal tests and acceleration vibration tests, the contact resistance of the connector did not change significantly, and the connection stability was greatly improved compared with the traditional structure.

[0017] (3) The floating structure has high reliability and low maintenance cost: it relies on the elasticity of the claw arm itself to achieve a certain amount of axial and radial floating compensation.

[0018] (4) Excellent conductivity to meet high current requirements: sufficient contact area and reasonable cross-sectional specifications, contact resistance ≤1mΩ; can stably carry high current of 7A or more, suitable for high power application scenarios. (5) Strong design uniqueness and market competitiveness: The male and female opposite pin-socket double-layer snap-fit ​​structure innovatively adopts the asymmetrical elastic design of "male inner pin + outer socket, female elastic inner socket + elastic outer pin", abandoning the traditional inner and outer conductor division mode, and achieving stable contact through the precise adaptation of rigid structure and elastic structure; at the same time, it supports the adjustment of board spacing height according to user needs, has excellent scene adaptability, is optimized for high current transmission scenarios, and is rare at home and abroad, combining structural stability and practical functional innovation; it integrates structural stability, blind mating function, springless floating, high current carrying capacity of 7A and above, fast insertion and removal, and flexible board spacing adaptation, breaking through the limitations of traditional connectors such as "cumbersome multi-layer interconnection, inconvenient maintenance, poor high current adaptability, and weak scene universality", and has significant technical innovation and market application value. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 A schematic diagram of the first type of public header surface mount.

[0020] Figure 2 The left view of the table in form one with a public header.

[0021] Figure 3 A schematic diagram of the second type of surface mount connector.

[0022] Figure 4 The left view of the second form of the public header table.

[0023] Figure 5 A schematic diagram of pin type 1 for male connectors.

[0024] Figure 6 Left view of the male-type pin.

[0025] Figure 7 A schematic diagram of pin type two for male connectors.

[0026] Figure 8 This is a schematic diagram of the structure with holes at both ends of the female connector.

[0027] Figure 9 A schematic diagram of a structure with a hole at one end of the female connector.

[0028] Figure 10 This is a schematic diagram of the female connector with openings at both ends for use in a circuit board-to-circuit board scenario according to the present invention.

[0029] Figure 11 This is a schematic diagram of a female connector with a hole at one end for use in a circuit board-to-circuit board scenario.

[0030] Figure 12 This is a connection diagram of the present invention used in a circuit board-cable scenario.

[0031] Figure 13 This is a schematic diagram of the connection of the present invention in a cable-to-cable scenario.

[0032] The names corresponding to the reference numerals in the attached figures are: 1-Male connector, 1-1-Connector body, 1-2-Outward protruding pin, 1-3-Inward recessed socket, 2-Female connector, 2-1-Inward recessed flexible socket, 2-2-Outward protruding flexible pin, 3-Circuit board, 4-Cable. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0035] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention. Example 1:

[0036] like Figures 1-10 As shown, this embodiment includes a high-current connector with a male-female anisotropic pin-socket double-layer snap-fit ​​connection structure, comprising several circuit boards 3, the number of which is set as needed. Several connectors are arranged between the circuit boards 3, the number of which is also set as needed. Each connector includes a male head 1 and a female head 2. The male heads 1 are fixed to the sidewalls of the circuit boards 3, essentially fixing them to the circuit boards 3 on both sides. The female head 2 is positioned between the male heads 1, also between the two circuit boards 3. Both ends of the female head 2 are inserted into the corresponding male heads 1. The connector adopts a male-female anisotropic pin-socket structure, consisting of two mating ends, a male head and a female head. Both ends employ a double-layer conductor design, with the double-layer conductors working together to achieve conductivity and snap-fit ​​functionality. The two layers are coaxially arranged, independently formed, and do not interfere with each other.

[0037] The male connector 1 includes a connector body 1-1, which is fixed to a circuit board 3. The end of the male connector 1 furthest from the circuit board 3 is designed with a double-layer structure, with the inner conductor end being a protruding pin 1-3 and the outer conductor end being a recessed socket 1-2. The male connector 1 can be fixed to the circuit board 3 in two ways: one is by surface bonding followed by soldering, and the other is by inserting it into the circuit board 3 through a socket.

[0038] Both ends of the female connector 2 are also designed with a double-layer structure. The inner conductor end is a concave elastic socket 2-1, and the outer conductor end is a convex elastic pin 2-2. The concave elastic socket 2-1 of the female connector has a chamfered edge to ensure good contact even if there is an angular offset after insertion with the male connector pin.

[0039] Insert the protruding flexible pin 2-2 of the female connector 2 into the recessed socket 1-2 of the male connector 1, and insert the protruding pin 1-3 of the male connector 1 into the recessed flexible socket 2-1 of the female connector. The male connector 1 adopts a "inner pin + outer socket" combination design: the end of the inner conductor is the protruding pin 1-3, and the end of the outer conductor is the recessed socket 1-2; the female connector 2 adopts a "flexible inner socket + flexible outer pin" reverse adaptation design: the end of the inner conductor is the recessed flexible socket 2-1, and the end of the outer conductor is the protruding flexible pin 2-2. In all pins and sockets, the inner socket and outer pins of female connector 2 possess elastic deformation capability; the pins and sockets of male connector 1 have a rigid basic structure, achieving elastic contact through cooperation with the elastic structure of the female connector. There are two connection methods: optical aperture connection and escapement connection. Optical aperture connection requires less insertion and extraction force than escapement connection, allowing for one-sided optical aperture and one-sided escapement connection between boards. When boards are separated, the connector is always on the escapement side. Both connection methods ensure smooth connection and stable contact, adapting to high current transmission requirements. Furthermore, the body length of both male and female connectors can be flexibly adjusted according to the user's actual board spacing height requirements. By adapting to conductor body lengths, precise adaptation to different board spacing scenarios is achieved, improving the versatility of the solution.

[0040] During docking, male connector 1 and female connector 2 precisely fit and engage through opposite pin-hole alignment—the inner pin of the male connector inserts into the flexible inner hole of the female connector, and the outer hole of the male connector engages with the flexible outer pin of the female connector; the flexible inner hole and flexible outer pin of the female connector undergo elastic deformation during docking, generating a stable pre-tightening force, which not only ensures a tight fit between the pins and holes of the male and female connectors, but also achieves a stable conductive connection with the docking components on both sides, forming a double redundant conductive path to ensure the stability of high current transmission.

[0041] This solution facilitates multi-layer board assembly, enabling rapid insertion and removal without soldering. High-current interconnection between boards can be achieved through precise engagement of male and female pins and sockets. It also supports rapid insertion and removal, significantly improving assembly efficiency and ease of maintenance.

[0042] To achieve the double-layer differential blind mating function, the height of the outer conductor end face of both male connector 1 and female connector 2 is designed to be higher than the height of the inner conductor end face, forming an axial layer difference. The specific value is set according to the size requirements. A radial guide cone is designed at the concave socket 1-2 port of male connector 1, and an auxiliary guide slope is designed at the convex pin 1-3 port of male connector 1. The angle of the radial guide cone and the auxiliary guide slope is set as needed, and generally not 45°. The convex elastic pin 2-2 port of female connector 2 matches the guide cone design of the concave socket 1-2 of male connector 1, and the concave elastic socket 2-1 port of female connector 2 matches the guide slope design of the convex pin 1-3 of male connector 1, together assisting in the precise alignment of the pin and the socket, improving the ease of assembly.

[0043] This structure supports experimental blind insertion. During blind insertion, the outer layer guide cone of the male connector first contacts and initially positions the female connector's elastic outer pin, guided by the layer difference structure to achieve coaxial alignment at both ends. Subsequently, under the action of insertion force, the inner layer pin of the male connector is gradually inserted into the elastic inner hole of the female connector, while the outer layer hole of the male connector simultaneously engages with the elastic outer pin of the female connector. The elastic structure of the female connector deforms and adapts synchronously, completing precise engagement and positioning. The collaborative design of the double-layer layer difference and the opposite pin-hole configuration realizes the blind insertion logic of "outer layer guidance first, inner layer docking later," achieving stable blind insertion operation without the need for external auxiliary positioning devices, and adapting to the convenient assembly requirements of high-current interconnection between multilayer boards.

[0044] This solution significantly improves structural stability. Through a double-layer, interlocking, gapless connection structure, it completely solves the problems of easy aging and detachment of solder joints in traditional welding solutions. At the same time, it avoids the gap problems that may occur in single-layer connections. After multiple insertion and removal tests and acceleration vibration tests, the connector contact resistance showed no significant change, and the connection stability was greatly improved compared to the traditional structure.

[0045] The floating and elastic functions are primarily achieved through the elastic structure of the female connector. Both the elastic inner socket 2-1 and the elastic outer pin 2-2 of the female connector 2 employ a variable cross-section design: the elastic outer pin 2-2 has a large and rigid root cross-section, a small and elastic middle cross-section, and a rounded contact head at the end; the inner wall of the elastic inner socket 2-1 features evenly distributed elastic ribs, with a smooth transition between the root cross-section and the conductor body, providing excellent elastic recovery capability. The pins and sockets of the male connector 1 are rigid structures, achieving mutual support and stable connection through cooperation with the elastic structure of the female connector. This eliminates the need for additional spring components, simplifying the structure while ensuring reliable high-current transmission.

[0046] It features a stable floating connection function, capable of floating both axially and radially. During axial floating, when there is an axial installation error between the male and female connectors, the elastic deformation of the female connector's elastic inner hole and elastic outer pin can compensate for part of the axial displacement, maintaining stable contact pressure through elastic restoring force. During radial floating, when there is radial eccentricity, the male connector's guiding structure cooperates with the female connector's elastic structure, automatically adjusting the contact position through the uneven elastic deformation of the female connector's elastic inner hole and elastic outer pin, compensating for part of the radial deviation. The entire floating process relies entirely on the elastic structure characteristics of the female connector, simplifying the structure while improving connection reliability in high-current transmission scenarios. This solution boasts high floating structure reliability and low maintenance costs, relying on the claw arm's own elasticity to achieve a certain amount of axial and radial floating compensation. After high and low temperature cycling tests from -40℃ to 125℃, the floating performance shows no degradation.

[0047] The male rigid pins / sockets and the female flexible pins / sockets have ample contact area, and the reasonable cross-sectional specifications significantly reduce contact resistance. The silver plating treatment improves conductivity and corrosion resistance. The anisotropic pin-socket combination of male and female forms a dual conductive path, which can stably meet the needs of high current transmission while reducing heat generation during transmission. Furthermore, the deformation adaptation of the female flexible structure ensures the continuity of the conductive path, avoids local overheating caused by poor contact, and guarantees long-term stable transmission of high current.

[0048] This solution boasts excellent conductivity, meeting the demands of high current. It features ample contact area and a reasonable cross-sectional specification, with a contact resistance of ≤1mΩ. It can stably carry currents of 7A and above, making it suitable for high-power applications.

[0049] Its unique design gives it a competitive edge in the market. This male-female anisotropic pin-socket dual-layer interlocking structure innovatively adopts an asymmetrical elastic design of "male inner pin + outer socket, female elastic inner socket + elastic outer pin," abandoning the traditional inner and outer conductor division mode. Stable contact is achieved through precise adaptation of rigid and elastic structures. It also supports adjusting the board spacing height according to user needs, exhibiting excellent scenario adaptability. Optimized specifically for high-current transmission scenarios, it is rare both domestically and internationally, combining structural stability with innovative practical functions. Integrating structural stability, blind mating function, springless floating, high current carrying capacity above 7A, rapid insertion and removal, and flexible board spacing adaptation, it breaks through the limitations of traditional connectors such as "cumbersome multi-layer interconnection, inconvenient maintenance, poor high-current adaptability, and weak scenario versatility," demonstrating significant technological innovation and market application value. Example 2:

[0050] like Figure 11 As shown, this embodiment is basically the same as the structure of embodiment 1, except that: this solution uses a male connector 1 and a female connector 2 with a single-sided opening to form a connector, and fixes the male connector 1 and the female connector 2 on different circuit boards 3 respectively, and inserts the end of the female connector 2 into the end of the male connector 1. Example 3:

[0051] like Figure 12 As shown, this embodiment is basically the same as the structure of embodiment 1, except that: this solution uses a male connector 1 and a female connector 2 with a single-sided opening to form a connector. The male connector 1 is fixed to the circuit board 3, the female connector 2 is fixed to the cable 4, and the corresponding end of the female connector 2 is inserted into the corresponding end of the male connector 1. Example 4:

[0052] like Figure 13As shown, this embodiment is basically the same as the structure of embodiment 1, except that: this solution uses a male head 1 and a female head 2 with a single-sided opening to form a connector, fixes the male head 1 and the female head 2 on different cables 4 respectively, and inserts the end of the female head 2 into the end of the male head 1.

[0053] Contents not described in detail in this specification are existing technologies known to those skilled in the art. Standard parts used in this invention can be purchased commercially, and irregularly shaped parts can be custom-made according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are already mature technologies. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also employ conventional connection methods from the prior art, which will not be detailed here.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-current connector with a male and female opposite-directional pin-socket type double-layer snap-fit ​​connection structure, characterized in that: It includes a male connector (1) and a female connector (2), with one end of the female connector (2) inserted into the male connector (1). The male connector (1) has a double-layer structure, with the inner conductor end being a protruding pin (1-3) and the outer conductor end being a recessed socket (1-2). The female connector (2) has a double-layer structure, with the inner conductor end being a recessed elastic socket (2-1) and the outer conductor end being a protruding elastic pin (2-2).

2. The high-current connector with a male-female opposite pin-socket double-layer snap-fit ​​connection structure according to claim 1, characterized in that: The protruding elastic pin (2-2) of the female head (2) is inserted into the concave socket (1-2) of the male head (1), and the protruding pin (1-3) of the male head (1) is inserted into the concave elastic socket (2-1) of the female head.

3. The high-current connector with a male-female opposite pin-socket type double-layer snap-fit ​​connection structure according to claim 2, characterized in that: The height of the outer conductor end face of both the male connector (1) and the female connector (2) is higher than the height of the inner conductor end face, forming an axial layer difference. A radial guide cone is designed at the concave socket (1-2) port of the male connector (1), and an auxiliary guide slope is designed at the convex pin (1-3) port of the male connector (1). The convex elastic pin (2-2) port of the female connector (2) matches the guide cone design of the concave socket (1-2) of the male connector (1), and the concave elastic socket (2-1) port of the female connector (2) matches the guide slope design of the convex pin (1-3) of the male connector (1).

4. The high-current connector with a male-female opposite pin-socket double-layer snap-fit ​​connection structure according to claim 2, characterized in that: The concave elastic socket (2-1) and the convex elastic pin (2-2) of the female head (2) both adopt a variable cross-section design. The convex elastic pin (2-2) has a large root cross-section, a small middle cross-section, and a rounded contact head at the end. The inner wall of the concave elastic socket (2-1) is designed with evenly distributed elastic ribs, and the root cross-section transitions smoothly with the conductor body.

5. The high-current connector with a male-female opposite pin-socket double-layer snap-fit ​​connection structure according to claim 1, characterized in that: It also includes a circuit board (3), and the male connectors (1) are all fixed to the sidewalls of the circuit board (3).

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