Photovoltaic female connector

Abstract

The utility model relates to the technical field of electric connection, in particular to a photovoltaic female head connector, which comprises a shell, a fixing assembly and an electric connection element, one end of the shell is provided with a fixing cavity, the other end of the shell is provided with a connecting plug, the connecting plug is provided with a terminal fixing groove, one end of the terminal fixing groove is communicated with the fixing cavity, and the other end of the terminal fixing groove is communicated with the electric connection element. The fixing assembly comprises a fixing front shell, a fixing rear shell and a wiring element, the fixing front shell and the fixing rear shell are connected with each other to form a fixing sleeve, a wiring cavity is formed in the fixing sleeve, one end of the power connection element is fixed through the fixing front shell, the other end of the power connection element is inserted into the terminal fixing groove, and the wiring element is arranged on the fixing rear shell. And a conductor element is arranged between the wiring element and the power connection element for connection. According to the utility model, when the power connection element and the wiring element are connected by arranging the conductor element, the fixed rear shell is disassembled, thereby facilitating assembly and wiring. The problem that wiring of an existing photovoltaic connector is inconvenient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connection, in particular to a photovoltaic female head connector. Background Art

[0002] A connector is a component that electronic engineering technicians often come into contact with. Its function is to build a communication bridge between a blocked or isolated circuit in a circuit, so that the current can flow and the circuit can achieve the intended function. An energy storage connector is a connector specifically used for connecting and transmitting electrical energy. The main functions of the energy storage connector are to provide current transmission, voltage distribution, and partial protection functions for the system battery pack. It needs to withstand high voltages and large currents, and also has a sufficiently low contact resistance to ensure stable current transmission and low energy consumption, thereby improving the efficiency of the entire energy storage system.

[0003] A photovoltaic connector is a connector used in a solar photovoltaic power generation system, mainly for the electrical connection between solar panels, between a solar panel and an inverter, and between an inverter and a distribution box.

[0004] In actual use, a photovoltaic connector needs to be wired to achieve electrical transmission. The existing photovoltaic connectors are inconvenient to wire, resulting in a large amount of wiring work during use. Therefore, new improvements need to be made to the existing structure of the photovoltaic connector. Summary of the Utility Model

[0005] To solve the above problems, when the utility model sets a conductor element connection between the power connection element and the wiring element, it can be achieved by disassembling the fixed rear shell, which is convenient for assembly and wiring. A photovoltaic female head connector that solves the problem of inconvenient wiring of the existing photovoltaic connector.

[0006] The technical solution adopted by the utility model is: a photovoltaic female head connector, including a housing, a fixing component, and a power connection element. One end of the housing is provided with a fixing cavity, and the other end is provided with a plug connector. The plug connector is provided with a terminal fixing groove, and one end of the terminal fixing groove communicates with the fixing cavity. The fixing component includes a fixing front shell, a fixing rear shell, and a wiring element. The fixing front shell and the fixing rear shell are connected to each other to form a fixing sleeve. A wiring cavity is arranged inside the fixing sleeve. One end of the power connection element is fixed through the fixing front shell, and the other end is inserted into the terminal fixing groove. The wiring element is arranged on the fixing rear shell, and a conductor element connection is arranged between the wiring element and the power connection element.

[0007] For further improvement of the above solution, the housing is provided with plug-in guiding strips on both sides of the plug connector. One end of the plug-in guiding strip extends towards the direction of the plug connector, and a plug-in fixing buckle is arranged at the end of the plug-in guiding strip.

[0008] A further improvement to the above solution is that a reinforcement platform is provided at the connection between the plug joint and the fixed cavity, and a sealing groove is provided on the reinforcement platform.

[0009] A further improvement to the above solution is that an installation platform is provided on the outer periphery of the fixed cavity of the housing, and an installation element is provided on the opposite side of the installation platform. The installation element is used to cooperate with the installation platform for fixed installation of the housing.

[0010] A further improvement to the above solution is that a rubber pad is provided on the surface of the installation platform facing the installation element, and an external thread diameter is provided on the side of the housing close to the installation platform. The installation element is a fixing nut and is threadedly connected to the external thread diameter.

[0011] A further improvement to the above solution is that the fixed front shell is provided with a clamping fixing ring and a wiring fixing ring. The clamping fixing ring faces the terminal fixing groove and is used to fix the power connection element. The terminal fixing groove is provided with a spring piece fixing groove facing the clamping fixing ring. The power connection element is provided with a fixing spring piece, and the outer periphery of the fixing spring piece is clamped in the spring piece fixing groove; the wiring fixing ring is arranged in the wiring cavity.

[0012] A further improvement to the above solution is that a tight-fitting strip is provided on the inner periphery of the fixed cavity, a fixed card slot is provided on the outside of the fixed cavity, and fixed buckles are provided on both sides of the fixed front shell. The fixed buckles are used to cooperate with the fixed card slot; the tight-fitting strip is used to tightly fit the fixed front shell and the fixed rear shell in the fixed cavity.

[0013] A further improvement to the above solution is that the fixed rear shell is provided with a wiring card slot, and a wiring fixing pressing piece is provided on the upper side of the wiring card slot. The wiring fixing pressing piece is used to press and fix the wiring element on the wiring card slot; the wiring fixing pressing piece is an elastic fixing pressing piece.

[0014] A further improvement to the above solution is that the fixed rear shell is provided with an assembly insertion strip, and an assembly insertion slot is provided in the fixed cavity. The assembly insertion strip is used to be inserted into the assembly insertion slot; a connection pin is provided at the rear end of the fixed rear shell.

[0015] A further improvement to the above solution is that the power connection element includes a plugging end, a fixed end, and a wiring end arranged in sequence. The plugging end is arranged in the terminal fixing groove, the fixed end is arranged on the fixed front shell, and the wiring end extends towards the wiring cavity.

[0016] A further improvement to the above solution is that a limiting ring is provided at one end of the terminal fixing groove. The limiting ring is used to limit the plugging end; the plugging end is provided with a plugging port, and a spring piece contact ring is provided on the plugging port.

[0017] The beneficial effects of the present utility model are:

[0018] Compared with the existing photovoltaic connectors, the fixing component of the present utility model is composed of a fixing front shell and a fixing rear shell. When connecting a conductor element between a power receiving element and a wiring element, it is only necessary to disassemble the fixing rear shell, which is convenient for assembly and wiring. This solves the problem of inconvenient wiring of the existing photovoltaic connectors.

[0019] Through the design of the outer shell, fixing component and power receiving element, the present utility model realizes the stable and reliable connection of the photovoltaic female head connector. The setting of the fixing cavity, plug connector and terminal fixing groove effectively guarantees the firmness and stability of the connection, ensuring the safe operation of the photovoltaic equipment. The fixing component includes a fixing front shell, a fixing rear shell and a wiring element, and their mutual connection forms a fixing sleeve, making the installation and maintenance of the connector more convenient. The power receiving element is fixed by the fixing front shell, the wiring element is arranged in the fixing rear shell, and the conductor element connects these components, providing convenience for the use of the connector. The design of the outer shell can effectively protect the electrical components inside the connector, while ensuring the sealing performance of the connector, enabling it to adapt to various complex outdoor environmental conditions, such as waterproofing and dustproofing, improving the durability and stability of the product. There is a conductor element connection between the wiring element and the power receiving element, ensuring good electrical conductivity of the connector, reducing resistance loss, and improving the overall efficiency of the photovoltaic system. Through characteristics such as stable and reliable connection, convenient installation and maintenance, effective protection and sealing, optimized electrical conductivity, strong adaptability, and safety and reliability, the present utility model provides an efficient, reliable and safe solution for the connection of photovoltaic equipment, helping to improve the performance and reliability of the photovoltaic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the connection structure of the photovoltaic female head connector of the present utility model;

[0021] Figure 2 is Figure 1 an exploded view of the photovoltaic female head connector in

[0022] Figure 3 is Figure 1 an exploded view of the photovoltaic female head connector from another perspective in

[0023] Figure 4 is Figure 1 a partial cross-sectional view of the photovoltaic female head connector in

[0024] Figure 5 is Figure 1 a partial cross-sectional view of the photovoltaic female head connector in

[0025] Figure 6 is Figure 1 a schematic diagram of a partial structure of the photovoltaic female head connector in

[0026] Figure 7 This is a schematic structural diagram of the power connection element of the present utility model.

[0027] Description of reference numerals in the drawings: housing 1, fixed cavity 11, tight-fitting strip 111, fixed card slot 112, assembly slot 113, plug connector 12, reinforcement platform 121, sealing groove 122, terminal fixing groove 13, elastic sheet fixing groove 131, limiting ring 132, plug-in guiding strip 14, plug-in fixing buckle 141, mounting platform 15, mounting element 16, rubber pad 161, fixing assembly 2, front fixing shell 21, clamping fixing ring 211, wiring fixing ring 212, fixing buckle 213, rear fixing shell 22, wiring card slot 221, wiring fixing pressing piece 222, assembly plug strip 223, connecting pin 224, wiring element 23, wiring cavity 24, conductor element 25, power connection element 3, fixing elastic sheet 31, plug-in end 32, plug-in port 321, elastic sheet contact ring 322, fixed end 33, wiring end 34. Detailed implementation manners

[0028] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present utility model are shown in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the understanding of the disclosure content of the present utility model is more thorough and comprehensive.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As Figures 1 to 7As shown in the figure, in an embodiment of the present utility model, a photovoltaic female head connector is involved, which includes a housing 1, a fixing component 2, and an electricity connection element 3. One end of the housing 1 is provided with a fixing cavity 11, and the other end is provided with a plug connector 12. The plug connector 12 is provided with a terminal fixing groove 13, and one end of the terminal fixing groove 13 communicates with the fixing cavity 11. The fixing component 2 includes a fixing front shell 21, a fixing rear shell 22, and a wiring element 23. The fixing front shell 21 and the fixing rear shell 22 are connected to each other to form a fixing sleeve. A wiring cavity 24 is arranged inside the fixing sleeve. One end of the electricity connection element 3 is fixed through the fixing front shell 21, and the other end is inserted into the terminal fixing groove 13. The wiring element 23 is arranged on the fixing rear shell 22, and a conductor element 25 is arranged between the wiring element 23 and the electricity connection element 3 for connection. In this embodiment, the fixing component 2 is composed of the fixing front shell 21 and the fixing rear shell 22. When the conductor element 25 is arranged between the electricity connection element 3 and the wiring element 23 for connection, the fixing rear shell 22 can be disassembled, which is convenient for assembly and wiring. The problem of inconvenient wiring of the existing photovoltaic connector is solved.

[0031] In this embodiment, through the design of the housing 1, the fixing component 2, and the electricity connection element 3, a stable and reliable connection of the photovoltaic female head connector is realized. The setting of the fixing cavity 11, the plug connector 12, and the terminal fixing groove 13 effectively guarantees the firmness and stability of the connection, ensuring the safe operation of the photovoltaic equipment. The fixing component 2 includes a fixing front shell 21, a fixing rear shell 22, and a wiring element 23. Their mutual connection forms a fixing sleeve, making the installation and maintenance of the connector more convenient. The electricity connection element 3 is fixed through the fixing front shell 21, the wiring element 23 is arranged on the fixing rear shell 22, and the conductor element 25 connects these components, providing convenience for the use of the connector. The design of the housing 1 can effectively protect the electrical components inside the connector, and at the same time ensure the sealing performance of the connector, enabling it to adapt to various complex outdoor environmental conditions, such as waterproofing and dustproofing, improving the durability and stability of the product. A conductor element 25 is arranged between the wiring element 23 and the electricity connection element 3 for connection, ensuring good electrical conductivity of the connector, reducing resistance loss, and improving the overall efficiency of the photovoltaic system. Through the characteristics of stable and reliable connection, convenient installation and maintenance, effective protection and sealing, optimized electrical conductivity, strong adaptability, and safety and reliability, this embodiment provides an efficient, reliable, and safe solution for the connection of photovoltaic equipment, helping to improve the performance and reliability of the photovoltaic system.

[0032] In the above embodiment, the wiring element 23 is connected to the electricity connection element 3 through the conductor element 25. In actual use, the conductor element 25 is connected by a braided flexible connection element. Specifically, a conductor structure formed by intertwining copper wires is adopted to integrally form the electricity connection element 23 and the conductor element 25.

[0033] On both sides of the plug connector 12, the housing 1 is provided with plug-in guiding strips 14. One end of the plug-in guiding strips 14 extends towards the direction of the plug connector 12, and the end of the plug-in guiding strips 14 is provided with plug-in fixing buckles 141. Specifically, at the connection between the plug connector 12 and the fixing cavity 11, a reinforcing platform 121 is provided, and a sealing groove 122 is provided on the reinforcing platform 121. In this embodiment, through the plug-in guiding strips 14 provided on both sides of the housing 1, the plug connector 12 can be effectively guided, ensuring accurate positioning of the plug-in, avoiding unstable factors during installation, and ensuring the firmness and reliability of the connection. The plug-in fixing buckles 141 provided at the ends of the plug-in guiding strips 14 can automatically lock after the plug-in is completed, ensuring the firm fixation of the plug connector 12, preventing loosening or detachment caused by external forces and other reasons, and improving the reliability and safety of the connector. The reinforcing platform 121 provided at the connection between the plug connector 12 and the fixing cavity 11 provides additional support, enhancing the structural strength of the connection part, effectively preventing loosening and damage caused by vibration or external forces, and ensuring the stability and reliability of the connector. The sealing groove 122 provided on the reinforcing platform 121 can install a sealing ring to ensure good sealing of the connection part, prevent external substances such as moisture and dust from entering the interior of the connector, protect the electrical components, extend the service life of the connector, and improve the adaptability of the connector in harsh environments.

[0034] On the outer periphery of the fixing cavity 11, the housing 1 is provided with a mounting platform 15. On the opposite side of the mounting platform 15, a mounting element 16 is provided, and the mounting element 16 is used to cooperate with the mounting platform 15 for fixing and installing the housing 1. Specifically, a rubber pad 161 is provided on the surface of the mounting platform 15 facing the mounting element 16. On one side of the housing 1 close to the mounting platform 15, an external thread diameter is provided, and the mounting element 16 is a fixing nut and is threadedly connected to the external thread diameter. In this embodiment, through the mounting platform 15 and the mounting element 16 provided on the outer periphery of the housing 1, the stable fixing and installation of the housing 1 are realized. The mounting element 16 cooperates with the mounting platform 15, enabling the housing 1 to be firmly fixed at the required position, ensuring that the stability and safety of the electrical connection will not be affected due to the loosening of the housing 1 during the use of the connector. The rubber pad 161 provided on the surface of the mounting platform 15 facing the mounting element 16 can provide a certain shock absorption and buffering effect, effectively reducing the vibration and friction between the housing 1 and the mounting platform 15, protecting the electrical components inside the connector, and extending the service life of the connector. The external thread diameter provided on one side of the housing 1 close to the mounting platform 15, and the mounting element 16 being a fixing nut and being threadedly connected to the external thread diameter, realize the convenient installation and disassembly of the connector, facilitating the maintenance and replacement of the connector.

[0035] The fixed front shell 21 is provided with a clamping fixing ring 211 and a wiring fixing ring 212. The clamping fixing ring 211 faces the terminal fixing groove 13 and is used to fix the power connection element 3. The terminal fixing groove 13 is provided with a spring piece fixing groove 131 facing the clamping fixing ring 211. The power connection element 3 is provided with a fixing spring piece 31, and the outer periphery of the fixing spring piece 31 is clamped in the spring piece fixing groove 131. The wiring fixing ring 212 is arranged in the wiring cavity 24. Specifically, the inner periphery of the fixing cavity 11 is provided with a tight-fitting strip 111, the outer side of the fixing cavity 11 is provided with a fixing clamping groove 112, and both sides of the fixed front shell 21 are provided with fixing buckles 213, and the fixing buckles 213 are used to cooperate with the fixing clamping groove 112. The tight-fitting strip 111 is used to tightly fit the fixed front shell 21 and the fixed rear shell 22 in the fixing cavity 11. In this embodiment, through the design of the clamping fixing ring 211 and the wiring fixing ring 212 provided on the fixed front shell 21, as well as the terminal fixing groove 13 and the spring piece fixing groove 131, the power connection element 3 and the wiring can be fixed inside the fixed front shell 21, ensuring the firmness and reliability of the wiring, avoiding loosening or falling off due to external forces and other reasons, and improving the reliability and safety of the connector. The tight-fitting strip 111 provided on the inner periphery of the fixing cavity 11, the fixing clamping groove 112 provided on the outer side, the fixing buckles 213 provided on both sides of the fixed front shell 21, and the cooperation of the fixed rear shell 22 can effectively ensure the sealing performance and protection performance of the connector, protect the electrical components inside the connector from being invaded by external substances, and improve the adaptability of the connector in harsh environments. The design of the fixing buckles 213 and the fixing clamping grooves 112 enables the fixed front shell 21 and the fixed rear shell 22 to be tightly fitted conveniently, realizing the convenient installation and disassembly of the connector, and facilitating the maintenance and replacement of the connector. The setting of the tight-fitting strip 111 can tightly fit the fixed front shell 21 and the fixed rear shell 22 in the fixing cavity 11, enhancing the structural stability of the connector, effectively preventing loosening and damage caused by vibration or external forces, and ensuring the stability and reliability of the connector.

[0036] The fixed rear housing 22 is provided with a wiring slot 221, and a wiring fixing pressing piece 222 is arranged on the upper side of the wiring slot 221. The wiring fixing pressing piece 222 is used to press and fix a wiring component 23 on the wiring slot 221; the wiring fixing pressing piece 222 is an elastic fixing pressing piece. In this embodiment, through the wiring slot 221 and the wiring fixing pressing piece 222 provided on the fixed rear housing 22, the wiring component 23 can be firmly fixed on the wiring slot 221, ensuring the stability and reliability of the wiring, avoiding loosening or falling off caused by external forces and other reasons, and improving the reliability and safety of the connector. The wiring fixing pressing piece 222 adopts an elastic fixing design, which can adapt to different specifications of the wiring component 23 within a certain range, ensuring the fastening degree of the connection, while reducing the damage to the wiring itself and extending the service life of the wiring component 23. The design of the elastic fixing pressing piece enables the wiring component 23 of the connector to be conveniently installed, replaced and maintained, improving the flexibility and maintenance convenience of the connector.

[0037] The fixed rear housing 22 is provided with an assembly insert 223, and the fixed cavity 11 is provided with an assembly slot 113. The assembly insert 223 is used to be inserted into the assembly slot 113; a connection pin 224 is arranged at the rear end of the fixed rear housing 22. In this embodiment, through the assembly insert 223 provided on the fixed rear housing 22 and the assembly slot 113 provided in the fixed cavity 11, the assembly of the connector can be made more stable and reliable. The assembly insert 223 is inserted into the assembly slot 113, ensuring the stable connection between the components of the connector and avoiding affecting the use performance of the connector due to loosening.

[0038] The power connection element 3 includes a plug end 32, a fixed end 33, and a wiring end 34 arranged in sequence. The plug end 32 is arranged in the terminal fixing groove 13, the fixed end 33 is arranged on the front fixing shell 21, and the wiring end 34 extends towards the wiring cavity 24. Specifically, a limiting ring 132 is arranged at one end of the terminal fixing groove 13, and the limiting ring 132 is used for limiting the plug end 32; the plug end 32 is provided with a plug port 321, and the plug port 321 is provided with a spring contact ring 322. In this embodiment, by arranging the plug end 32 in the terminal fixing groove 13 and arranging a limiting ring 132 at one end of the terminal fixing groove 13, it can ensure that the plug end 32 is stably connected at the correct position, avoiding poor contact or disconnection caused by inaccurate position. The plug port 321 is provided with a spring contact ring 322, which can ensure good contact with other connectors or devices, improving the reliability and stability of the electrical connection. The plug end 32, the fixed end 33, and the wiring end 34 arranged in sequence make the structure of the power connection element 3 more reasonable and compact, reducing the volume and weight of the connector, while improving the assembly efficiency and convenience of the connector. The arrangement of the limiting ring 132 can effectively limit the plug end 32, preventing over-insertion or detachment, thereby protecting the normal use of the plug end 32 and extending its service life.

[0039] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A photovoltaic female connector, characterized in that: It includes a shell, a fixing component and an electrical connection element. One end of the shell is provided with a fixing cavity and the other end is provided with a plug connector. The plug connector is provided with a terminal fixing groove. One end of the terminal fixing groove is connected to the fixing cavity. The fixing component includes a fixed front shell, a fixed rear shell and a wiring element. The fixed front shell and the fixed rear shell are connected to each other to form a fixed sleeve. A wiring cavity is provided inside the fixed sleeve. One end of the electrical connection element is fixed by the fixed front shell and the other end is inserted into the terminal fixing groove. The wiring element is provided on the fixed rear shell. A conductor element is provided between the wiring element and the electrical connection element.

2. The photovoltaic female connector according to claim 1, characterized in that: The shell is provided with plug-in guide strips on both sides of the plug connector, one end of the plug-in guide strip extends toward the plug connector, and the end of the plug-in guide strip is provided with a plug-in fixing buckle; A reinforcement platform is provided at the connection between the plug connector and the fixing cavity, and a sealing groove is provided on the reinforcement platform.

3. The photovoltaic female connector according to claim 1, characterized in that: The outer periphery of the fixed cavity of the housing is provided with a mounting platform, and an installation element is provided on the opposite side of the mounting platform. The installation element is used to cooperate with the mounting platform for fixed installation of the housing.

4. The photovoltaic female connector according to claim 3, characterized in that: A rubber pad is arranged on one side of the mounting platform facing the mounting element, a threaded outer diameter is arranged on one side of the housing close to the mounting platform, and the mounting element is a fixing nut connected to the threaded outer diameter through threads.

5. The photovoltaic female connector according to claim 1, characterized in that: The fixed front shell is provided with a clamping fixing ring and a wiring fixing ring. The clamping fixing ring faces the terminal fixing groove and is used to fix the power connection element. The terminal fixing groove is provided with a spring fixing groove facing the clamping fixing ring. The power connection element is provided with a fixing spring. The outer periphery of the fixing spring is clamped in the spring fixing groove; the wiring fixing ring is arranged in the wiring cavity.

6. The photovoltaic female connector according to claim 5, characterized in that: A tight-fitting strip is arranged on the inner periphery of the fixed cavity, a fixed slot is arranged on the outer side of the fixed cavity, and fixed buckles are arranged on both sides of the fixed front shell, and the fixed buckles are used to cooperate with the fixed slots; the tight-fitting strip is used to fit the fixed front shell and the fixed rear shell tightly in the fixed cavity.

7. The photovoltaic female connector according to claim 6, characterized in that: The fixed rear shell is provided with a wiring slot, and a wiring fixing pressing piece is provided on the upper side of the wiring slot. The wiring fixing pressing piece is used to press and fix the wiring element on the wiring slot; the wiring fixing pressing piece is an elastic fixing pressing piece.

8. The photovoltaic female connector according to claim 1, characterized in that: The fixed rear shell is provided with an assembly insert, the fixed cavity is provided with an assembly slot, and the assembly insert is used to be inserted in the assembly slot; the rear end of the fixed rear shell is provided with a connecting pin.

9. The photovoltaic female connector according to claim 1, characterized in that: The power connection element comprises a plug-in end, a fixed end and a wiring end which are arranged in sequence, the plug-in end is arranged in a terminal fixing groove, the fixed end is arranged in a fixed front shell, and the wiring end extends toward the wiring cavity.

10. The photovoltaic female connector according to claim 9, characterized in that: A limiting ring is provided at one end of the terminal fixing groove, and the limiting ring is used to limit the plug-in end; the plug-in end is provided with a plug-in port, and the plug-in port is provided with a spring contact ring.

Images