A power connector

Abstract

The application discloses a power connector, comprising a male head shell and a female head shell connected through threads; the male head shell is provided with a locking assembly for preventing the female head shell from being reversed and an unlocking assembly for releasing the locking; the male head shell and the female head shell are electrically connected through a coaxially arranged first annular contact assembly, realizing arbitrary-angle plug-in connection; a universal swing assembly is arranged at the end of the male head shell away from the female head shell, the universal swing assembly comprises a swing ring, the inner side surface of the swing ring is a spherical surface, a swing ball is movably arranged in the swing ring, a threading hole is formed through the swing ball, and the threading hole is used for threading an external wire; a wiring terminal body is arranged in the male head shell and used for connecting the external wire; and the wiring terminal body and the annular contact assembly are connected through an extension wire, so that the external wire can swing in any direction. The design can improve the bending fatigue life of the wire by more than 10 times, improve the connection efficiency of the male head and the female head by 80%, and bear greater acceleration and greater random vibration.

Description

Technical Field

[0001] This application relates to the field of electrical connection technology, and in particular to a power connector. Background Technology

[0002] Power connectors are fundamental components in electrical systems, enabling power transmission and signal connection. They are widely used in industrial automation, automotive electronics, new energy equipment, and outdoor communications. As the operating environments of electrical equipment become increasingly complex, higher demands are being placed on the reliability, ease of operation, and environmental adaptability of power connectors.

[0003] The existing power connectors have the following three main drawbacks: The problem of fatigue damage caused by wire bending: The connection between the wire and the male connector of traditional power connectors is mostly a rigid fixed structure. When the wire is subjected to swinging and bending forces for a long time, the stress will be highly concentrated at the joint root between the wire and the connector housing. After a certain number of bending cycles, the wire core is prone to fatigue fracture, and the insulation layer will also be damaged and cracked, which will lead to safety hazards such as poor contact, short circuit, or even electrical fire. Although some products have rubber sleeves installed at the root of the wire to relieve stress, the rubber sleeves can only play a limited buffering role and cannot fundamentally eliminate stress concentration. Moreover, the rubber material will age and harden after long-term use, losing its protective effect.

[0004] The problem of difficulty in aligning the connection angle: Most existing power connectors use pin-type, surface-mount, or multi-core pin contact structures. When connecting the male and female connectors, they must be strictly aligned at a specific angle to complete the insertion. Especially in working conditions such as low light, confined space, operators wearing gloves, or equipment in motion, accurate alignment is extremely difficult. This not only reduces connection efficiency but may also cause the contacts to bend, deform, or even be damaged due to forced insertion.

[0005] Loose connection issue: Although threaded power connectors offer high connection strength, in environments with frequent vibration and impact (such as automotive and construction machinery), the threads are prone to loosening. This leads to a decrease in contact pressure between the male and female connectors, an increase in contact resistance, and phenomena such as voltage drops and arcing, which can even cause power outages in severe cases. Existing anti-loosening measures, such as adding anti-loosening washers and applying thread-locking adhesive, are either ineffective or make disassembly difficult, affecting equipment maintenance efficiency.

[0006] Therefore, developing a power connector that effectively solves the problem of wire bending fatigue, allows for connection without angle alignment, and provides a secure, non-loose connection has significant engineering application value. Summary of the Invention

[0007] The main purpose of this application is to propose a power connector that aims to solve the problems of wire bending fatigue, difficulty in aligning connection angles, and easy loosening of connections in existing power connectors.

[0008] To achieve the above objectives, the power connector proposed in this application includes a male head housing and a female head housing connected by threads; The male head housing is provided with a locking component to prevent the female head housing from rotating in reverse, and an unlocking component to release the lock; The male head housing and the female head housing are electrically connected by a first annular contact assembly arranged coaxially, enabling insertion connection at any angle. The male head housing is provided with a universal swing assembly at one end away from the female head housing. The universal swing assembly includes a swing ring, the inner surface of which is a spherical surface. A swing ball is movably disposed inside the swing ring, and a wire-passing hole is provided through the swing ball for external wires to pass through. The male connector housing is provided with a terminal body for connecting external wires. The terminal body is connected to the annular contact assembly via a telescopic wire to allow the external wires to swing in any direction.

[0009] Optionally, the locking assembly includes a ratchet ring, which is mounted in the male head housing via an axial sliding structure. The axial sliding structure is used for axial sliding of the ratchet ring and restricts the rotation of the ratchet ring. Multiple elastic elements are provided between the ratchet ring and the inside of the male head housing. The elastic elements are used to push the ratchet ring to engage with the ratchet teeth on the female head housing.

[0010] Optionally, the unlocking component includes an unlocking groove formed on the side of the ratchet ring, and the unlocking groove is provided with a first inclined surface; An unlocking button is provided on the outer side of the male connector housing corresponding to the unlocking slot. The unlocking end of the unlocking button penetrates the side wall of the male connector housing and is provided with a second inclined surface. The second inclined surface slides against the first inclined surface to push the ratchet ring away from the female connector housing and to push the unlocking button to reset.

[0011] Optionally, the first annular contact assembly includes a first contact element and a second contact element; The first contact element is fixedly disposed in the female head housing by the first mounting base, and the plurality of first contact elements are coaxially arranged annular or cylindrical conductors; The male head housing is provided with a second mounting base, and the second mounting base is provided with a matching contact groove corresponding to the first contact member. The second contact member is provided in the contact groove respectively. The second contact is electrically connected to the corresponding retractable wire, and the second contact is used to make contact with the corresponding first contact.

[0012] Optionally, each of the contact grooves is provided with a plurality of second contact elements, which are evenly distributed around the axis in a circumferential direction; The second contact element is an arc-shaped elastic sheet made of metal.

[0013] Optionally, the oscillating ball extends into the male connector housing along the axis of the thread hole, and the terminal body is threaded onto the first extension cylinder; The swing ball extends outward from the male connector housing along the axis of the wire hole, and the second extension cylinder is provided with a locking structure for clamping the external wire.

[0014] Optionally, the terminal body includes a first terminal body and a second terminal body; The first end body is provided with multiple wiring terminals for connecting external wires; The second end body is connected to the telescopic cable; The first end body is rotatably connected to the second end body, and a second annular contact assembly is provided between the first end body and the second end body for electrical connection between the telescopic wire and the external wire.

[0015] Optionally, the swing ring extends to both the inner and outer ends of the male connector housing with multiple arc-shaped reinforcing parts. The multiple reinforcing parts are evenly distributed around the wire hole in the circumference, and an avoidance groove is formed between adjacent reinforcing parts to avoid the swing of the external wire. The swing ring is connected to the male head housing via a rotating structure, allowing it to swing and rotate around the axis.

[0016] Optionally, the male housing is composed of a first housing and a second housing connected by threads; The axial position of the connection between the first housing and the second housing corresponds to the installation position of the terminal body, so that the external wire can be connected to the terminal body.

[0017] Optionally, both the male and female housings are provided with anti-slip blocks or protective textures on their outer sides.

[0018] The advantages of the power connector proposed in this application are as follows: This application's technical solution features a male connector housing and a female connector housing connected by threads. The male connector housing contains a locking component to prevent the female connector housing from reversing, and an unlocking component to release the lock. The male and female connector housings are electrically connected via a coaxially arranged first annular contact component, enabling insertion at any angle. A universal swing component is located at the end of the male connector housing furthest from the female connector housing. This universal swing component includes a swing ring with a spherical inner surface. A swing ball is movably positioned inside the swing ring, with a through-hole for external wires to pass through. A terminal block is located inside the male connector housing for connecting external wires. The terminal block is connected to the annular contact component via a telescopic wire, allowing the external wires to swing in any direction. During connection, the male connector housing is held at any angle and aligned with the female connector housing. Rotating the male connector housing clockwise causes the threads to engage, moving the male connector axially toward the female connector. During this process, the first annular contact component gradually makes full contact, and simultaneously, the locking component automatically engages, preventing the male and female connectors from reversing. During use, when the external wire is subjected to swinging, bending, or torsional forces in any direction, the swinging ball rotates freely within the spherical cavity of the swing ring. The telescopic wire extends and retracts synchronously with the swinging ball, and there is no stress concentration at the connection root between the wire and the connector. For disassembly, press the unlocking component to release the ratchet lock, rotate the male connector housing counterclockwise, the threads disengage, and the male and female connectors separate. This design increases the bending fatigue life of the wire by more than 10 times; the connection efficiency of the male and female connectors is increased by 80%, enabling 360° blind insertion without any angle alignment, making it particularly suitable for confined spaces, gloved operation, or nighttime operation; and it increases anti-loosening reliability: it can withstand greater acceleration and greater random vibration, achieving no loosening and no change in contact resistance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of the power connector of this application; Figure 2 This is an exploded view of the power connector structure of this application; Figure 3 This is a schematic diagram of the internal structure of the power connector in this application; Figure 4 This is an enlarged schematic diagram of a portion of the structure at point A of the power connector in this application; Figure 5 This is an enlarged schematic diagram of a portion of the structure at point B of the power connector in this application; Figure 6 This is a schematic diagram of the universal swing assembly in the power connector of this application; Figure 7 This is a schematic diagram of the ratchet ring in the power connector of this application.

[0021] Explanation of icon numbers: 1. Male housing; 101. First housing; 102. Second housing; 2. Female head casing; 3. Locking assembly; 301. Ratchet ring; 302. Elastic element; 310. Unlocking component; 311. Unlocking slot; 312. Unlocking button; 313. Guide tube; 314. Sealed enclosure structure; 320. Axial sliding structure; 321. Slider; 4. First annular contact assembly; 401. First contact element; 402. Second contact element; 403. First mounting base; 404. Second mounting base; 405. Contact groove; 5. Universal swing assembly; 510. Swing ring; 511. Reinforcing part; 520. Swinging ball; 521. Threading hole; 522. First extension tube; 523. Second extension tube; 524. Locking structure; 6. Terminal body; 601. First terminal body; 602. Second terminal body; 7. Retractable power cord.

[0022] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0026] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0028] Power connectors are fundamental components in electrical systems, enabling power transmission and signal connection. They are widely used in industrial automation, automotive electronics, new energy equipment, and outdoor communications. As the operating environments of electrical equipment become increasingly complex, higher demands are being placed on the reliability, ease of operation, and environmental adaptability of power connectors.

[0029] The existing power connectors have the following three main drawbacks: The problem of fatigue damage caused by wire bending: The connection between the wire and the male connector of traditional power connectors is mostly a rigid fixed structure. When the wire is subjected to swinging and bending forces for a long time, the stress will be highly concentrated at the joint root between the wire and the connector housing. After a certain number of bending cycles, the wire core is prone to fatigue fracture, and the insulation layer will also be damaged and cracked, which will lead to safety hazards such as poor contact, short circuit, or even electrical fire. Although some products have rubber sleeves installed at the root of the wire to relieve stress, the rubber sleeves can only play a limited buffering role and cannot fundamentally eliminate stress concentration. Moreover, the rubber material will age and harden after long-term use, losing its protective effect.

[0030] The problem of difficulty in aligning the connection angle: Most existing power connectors use pin-type, surface-mount, or multi-core pin contact structures. When connecting the male and female connectors, they must be strictly aligned at a specific angle to complete the insertion. Especially in working conditions such as low light, confined space, operators wearing gloves, or equipment in motion, accurate alignment is extremely difficult. This not only reduces connection efficiency but may also cause the contacts to bend, deform, or even be damaged due to forced insertion.

[0031] Loose connection issue: Although threaded power connectors offer high connection strength, in environments with frequent vibration and impact (such as automotive and construction machinery), the threads are prone to loosening. This leads to a decrease in contact pressure between the male and female connectors, an increase in contact resistance, and phenomena such as voltage drops and arcing, which can even cause power outages in severe cases. Existing anti-loosening measures, such as adding anti-loosening washers and applying thread-locking adhesive, are either ineffective or make disassembly difficult, affecting equipment maintenance efficiency.

[0032] Therefore, developing a power connector that can effectively solve the problem of wire bending fatigue, connect without the need for angle alignment, and ensure a firm and secure connection that is not easily loosened has significant engineering application value.

[0033] In view of this, this application proposes a power connector.

[0034] In the embodiments of this application, reference is made to Figures 1 to 7The aforementioned power connector includes a male housing 1 and a female housing 2 connected by threads. The male housing 1 is provided with a locking component 3 to prevent the female housing 2 from reversing, and an unlocking component 310 to release the lock. The male housing 1 and the female housing 2 are electrically connected by a first annular contact component 4 arranged coaxially to achieve an arbitrary angle insertion connection. A universal swing component 5 is provided at the end of the male housing 1 away from the female housing 2. The universal swing component 5 includes a swing ring 510, the inner surface of which is a spherical surface. A swing ball 520 is movably arranged inside the swing ring 510. A wire hole 521 is opened through the swing ball 520 for external wires to pass through. A terminal body 6 is provided inside the male housing 1 for connecting external wires. The terminal body 6 is connected to the annular contact component by a telescopic wire 7 to achieve arbitrary oscillation of the external wires.

[0035] This device employs a threaded main locking system combined with a ratchet unidirectional anti-loosening system: the thread provides the basic axial connection force, while the ratchet mechanism forms a unidirectional locking barrier, fundamentally blocking the thread reversal path under vibration; a coaxial annular omnidirectional conductive system: utilizing the 360° rotational symmetry of the annular structure, reliable electrical contact between the male and female connectors is achieved at any relative angle, completely eliminating the need for angle alignment; and a ball-joint universal stress relief structure: through the unrestrained rotation of the swinging ball 520 within the spherical surface, the rigid bending stress at the root of the wire is converted into spherical sliding friction, which, combined with the length compensation of the telescopic cable 7, completely prevents the core wire from being pulled or bent.

[0036] In this embodiment, the telescopic wire 7 is a spiral wire with a certain degree of elasticity, which can extend under the action of external force and contract under its own elastic force; the male head housing 1 and the female head housing 2 are connected by fine thread, which has a better anti-loosening effect than coarse thread; the first annular contact component 4 is arranged coaxially with the thread to ensure uniform contact pressure when moving axially.

[0037] Specifically, when connecting this device, hold the male connector housing 1 at any angle and align it with the female connector housing 2. Rotate the male connector housing 1 clockwise, and the threaded engagement will cause the male connector to move axially toward the female connector. During this process, the first annular contact component 4 will gradually make full contact, and at the same time, the locking component 3 will automatically engage to prevent the male and female connectors from reversing. In use, when the external wire is subjected to swinging, bending, or torsional forces in any direction, the swing ball 520 will rotate freely within the spherical cavity of the swing ring 510, and the telescopic wire 7 will extend and retract synchronously with the swing of the ball, with no stress concentration at the connection root between the wire and the connector. When disassembling, press the unlocking component 310 to release the ratchet lock, rotate the male connector housing 1 counterclockwise, the thread will disengage, and the male and female connectors will separate.

[0038] Furthermore, the locking assembly 3 includes a ratchet ring 301, which is mounted inside the male head housing 1 via an axial sliding structure 320. The axial sliding structure 320 is used for axial sliding of the ratchet ring 301 and restricts its rotation. Multiple elastic elements 302 are disposed between the ratchet ring 301 and the interior of the male head housing 1. The elastic elements 302 are used to push the ratchet ring 301 to engage with the ratchet teeth on the female head housing 2. One-way automatic locking is achieved using "axial sliding + circumferential constraint + elastic preload": the axial sliding structure 320 allows the ratchet ring 301 to move along its axis but restricts its rotation; the ratchet teeth on the female head housing 2 are one-way teeth (beveled guide, straight locking); the elastic elements 302 always apply preload to the ratchet ring 301 to ensure that the ratchet teeth are always engaged.

[0039] In this embodiment, the axial sliding structure 320 includes an axial guide groove and a slider 321. At least three axial guide grooves are uniformly opened circumferentially on the inner wall of the male head housing 1. The slider 321 is correspondingly provided on the outer wall of the ratchet ring 301, and the slider 321 is slidably disposed in the corresponding guide groove. The elastic element 302 is preferably a cylindrical compression spring, and multiple elastic elements 302 are uniformly distributed circumferentially.

[0040] Specifically, the locking process is as follows: the male head rotates clockwise, and the inclined surface of the ratchet of the female head contacts the inclined surface of the ratchet ring 301, generating an axial force to push the ratchet ring 301 to move backward and compress the elastic element 302; after the ratchet slides past one tooth, the elastic element 302 pushes the ratchet ring 301 to return to its original position, and the ratchet enters the next tooth groove for engagement.

[0041] Locked state: The preload of the elastic element 302 keeps the ratchet tightly engaged, and any force attempting to reverse the rotation counterclockwise will be blocked by the straight surface of the ratchet and cannot rotate.

[0042] Unlocking preparation: Unlocking component 310 pushes ratchet ring 301 to move backward, compressing elastic element 302, causing the ratchet to disengage, at which point the male head can rotate freely.

[0043] The design features automatic locking without the need for additional operation: it automatically engages once locked in place, requiring no additional locking action from the operator; and it features gapless locking: the ratchet engagement is a rigid contact with no loosening gaps, and will not produce abnormal noise or poor contact under vibration.

[0044] Furthermore, the unlocking component 310 includes an unlocking groove 311 formed on the side of the ratchet ring 301, with a first inclined surface inside the unlocking groove 311; an unlocking button 312 is provided on the outer side of the male connector housing 1 corresponding to the unlocking groove 311, the unlocking end of the unlocking button 312 penetrates through the side wall of the male connector housing 1 and has a second inclined surface, the second inclined surface sliding relative to the first inclined surface, used to push the ratchet ring 301 away from the female connector housing 2, and used to push the unlocking button 312 to reset. The direction of force is converted based on the inclined surface transmission principle: the radial pressing force of the unlocking button 312 is converted into the axial moving force of the ratchet ring 301.

[0045] In this embodiment, two unlocking components 310 are symmetrically arranged. Unlocking is achieved by pressing with two fingers simultaneously, which balances the force on the ratchet ring 301 and prevents the ratchet ring 301 from jamming. The outer side of the unlocking button 312 is also provided with a guide cylinder 313 to guide the radial movement of the button. The outer opening of the guide cylinder 313 is sealed and fixed with a sealing wrapping structure 314 made of leather or rubber material to prevent external debris from jamming the unlocking button 312. The inclination angles of the first inclined surface (on the ratchet ring 301) and the second inclined surface (on the unlocking button 312) are both 45°, resulting in the highest transmission efficiency.

[0046] Specifically, to unlock, press the unlock button 312 with your finger. The button moves radially inward, and the second inclined surface slides along the first inclined surface, generating an axial force that pushes the ratchet ring 301 backward, completely disengaging the ratchet. Holding down the unlock button 312 keeps the ratchet disengaged, allowing the male prong to be rotated counterclockwise and pulled out. Then, releasing the unlock button 312 causes the elastic element 302 to push the ratchet ring 301 back to its original position. Simultaneously, the first inclined surface slides along the second inclined surface, generating a force that pushes the unlock button 312 radially outward to reset. This design allows unlocking with just one hand, eliminating the need for both hands; the button's press stroke is only about 2mm, making operation effortless.

[0047] In other embodiments, a reset spring is provided between the unlock button 312 and the male housing 1 to push the unlock button 312 to reset radially outward; the reset spring provides the reset force of the button to ensure that the button automatically returns to the initial position after unlocking.

[0048] Furthermore, the first annular contact assembly 4 includes a first contact element 401 and a second contact element 402; the first contact element 401 is fixedly disposed in the female head housing 2 by a first mounting base 403, and a plurality of first contact elements 401 are coaxially arranged annular or cylindrical conductors; the male head housing 1 is provided with a second mounting base 404, and the second mounting base 404 is provided with a contact groove 405 with a matching shape corresponding to the first contact element 401, and the second contact element 402 is disposed in the contact groove 405 respectively; the second contact element 402 is electrically connected to the corresponding retractable wire 7, and the second contact element 402 is used to make contact with the corresponding first contact element 401. Omnidirectional conductivity is achieved by utilizing the rotational symmetry of the coaxial ring structure: the first contact 401 (female head) is a fixed coaxial ring, and the second contact 402 (male head) is a corresponding coaxially arranged contact; no matter what angle the male head rotates relative to the female head, the second contact 402 is always in contact with the circumferential surface of the first contact 401, maintaining the continuity of the electrical connection.

[0049] In this embodiment, the first contact 401 is preferably made of brass; there are 3 first contact 401s, of which the central cylindrical first contact 401 is grounded, the middle annular first contact 401 is connected to the live wire / positive terminal, and the outer first contact 401 is connected to the neutral wire / negative terminal.

[0050] Specifically, the male connector moves axially toward the female connector, and the first contact 401 gradually enters the corresponding contact groove 405 of the second mounting base 404, contacting the corresponding second contact 402. When the thread is tightened in place, the second contact 402 maintains a stable contact pressure with the first contact 401, achieving electrical connection between the first and second contact 401. The male connector can rotate at any angle relative to the female connector, and the second contact 402 slides along the circumferential surface of the first contact 401, with the contact area and contact pressure remaining essentially unchanged, and the electrical connection unaffected. This design achieves true 360° blind mating: no alignment with any marks, keyways, or pins is required, and connection can be made at any angle; large contact area: the annular contact area is much larger than traditional pinhole contacts, resulting in low contact resistance and strong current carrying capacity; uniform wear: the contact is a circumferential sliding surface, and wear is evenly distributed across the entire circumference, resulting in a long service life.

[0051] Furthermore, each contact groove 405 is provided with multiple second contact elements 402, which are evenly distributed circumferentially around the axis; the second contact elements 402 are arc-shaped elastic sheets made of metal. The multi-point elastic parallel contact structure improves contact reliability: multiple circumferentially evenly distributed arc-shaped elastic sheets simultaneously contact the circumferential surface of the first contact element 401, forming multiple parallel current paths; the pre-deformation of the elastic sheets generates stable contact pressure, which can automatically compensate for processing errors and wear.

[0052] In this embodiment, eight arc-shaped elastic sheets are evenly arranged in the inner circumference of each contact groove 405. The elastic sheets are preferably beryllium copper alloy and are gold-plated to improve conductivity. One end of the elastic sheet is fixed to the inner wall of the groove of the second mounting base 404 by stamping and riveting, and the other end is a free end that is bent inward to form an arc-shaped contact part.

[0053] Specifically, the first contact element 401 enters the contact groove 405, compressing the arc-shaped elastic sheet to deform and generate elastic pre-pressure. Multiple elastic sheets simultaneously contact the first contact element 401, and current is transmitted through multiple paths. Even if individual elastic sheets have poor contact, the other elastic sheets can still ensure electrical connection. When the elastic sheet wears down, its elastic deformation will automatically recover, maintaining constant contact pressure and long-term stable contact resistance. This design improves contact reliability several times: multi-point parallel contact means that single-point failure does not affect overall conductivity; the elastic structure can compensate for wear and processing errors within a certain range.

[0054] Furthermore, a first extension cylinder 522 extends from the oscillating ball 520 into the male connector housing 1 along the axis of the wire hole 521, and the terminal body 6 is threadedly connected to the first extension cylinder 522; a second extension cylinder 523 extends from the oscillating ball 520 outward from the male connector housing 1 along the axis of the wire hole 521, and the second extension cylinder 523 is provided with a locking structure 524 for clamping the external wire. The problem of axial pulling of the wire is completely solved by the bidirectional extension cylinder + double fixing structure: the inner first extension cylinder 522 is threadedly connected to the terminal body 6 to achieve rigid fixation of the core wire and the oscillating ball 520; the outer second extension cylinder 523 clamps the outer sheath of the wire through the locking structure 524 to prevent axial movement of the wire; the extension cylinder extends the connection length between the wire and the oscillating ball 520, further dispersing bending stress.

[0055] In this embodiment, the locking structure 524 adopts existing technology, specifically a standard cable gland structure: the outer end of the second extension tube 523 is provided with a tapered inner hole, which is matched with a tapered fluororubber sealing plug and a locking nut. The inner hole of the sealing plug is precisely matched with the outer diameter of the wire. When the locking nut is tightened, the sealing plug shrinks radially, thereby achieving the functions of clamping the wire and sealing and waterproofing.

[0056] Specifically, the external wire is sequentially passed through the second extension tube 523, the wire hole 521 of the swing ball 520, and the first extension tube 522. After stripping the insulation layer of the core wire, it is connected to the terminal of the connector body 6. The core wire is fixed by tightening the wire clamping screw of the connector body 6, and then the locking structure 524 on the second extension tube 523 is tightened to clamp the outer sheath of the wire. When the wire is subjected to bending or pulling force, the force is transmitted to the swing ball 520 through the second extension tube 523, causing the ball to rotate in the spherical cavity, and the wire itself is not subjected to bending or pulling force. With the double fixation of the core wire and the outer sheath, it can withstand an axial tensile force of about 50N, and the wire will not come out. The stress is more thoroughly dispersed: the extension tube transfers the stress concentration point from the wire hole 521 to the locking structure 524, which increases the bending fatigue life by 20%. The wiring is convenient: the threaded connector body 6 makes it easy to disassemble and replace the wire without disassembling the entire connector.

[0057] Furthermore, the terminal body 6 includes a first terminal body 601 and a second terminal body 602; the first terminal body 601 is provided with multiple terminals for connecting external wires; the second terminal body 602 is connected to the telescopic wire 7; the first terminal body 601 and the second terminal body 602 are rotatably connected, and a second annular contact assembly is provided between the first terminal body 601 and the second terminal body 602 for electrical connection between the telescopic wire 7 and the external wires. The problem of wire torsional fatigue is solved by the "rotational connection + second annular contact assembly": the first terminal body 601 is fixedly connected to the external wire and can rotate 360° with the wire; the second terminal body 602 is fixedly connected to the telescopic wire 7 and remains stationary; the two are connected continuously by the second annular contact assembly during rotation, completely eliminating the internal stress generated by wire torsion.

[0058] Specifically, the second annular contact assembly can adopt the same structure as the first annular contact assembly 4; a small rolling bearing can also be provided between the first end body 601 and the second end body 602 to make the rotation of the first end body 601 and the second end body 602 smoother; when the external wire is subjected to torsional force, it drives the first end body 601 to rotate freely relative to the second end body 602; the annular conductive ring of the second annular contact assembly always maintains contact with the elastic contact piece, and the current can flow from the first end body 601 to the second end body 602, and then through the telescopic wire 7 to the first annular contact assembly 4. This completely solves the problem of torsional fatigue: allowing the wire to rotate 360° infinitely, thus improving torsional fatigue life; and ensuring uninterrupted electrical connection: the contact resistance change during rotation is ≤1mΩ, with no instantaneous power outages.

[0059] Furthermore, the swing ring 510 has multiple arc-shaped reinforcing parts 511 extending from both the inner and outer ends of the male connector housing 1. These reinforcing parts 511 are evenly distributed circumferentially around the wire hole 521, and adjacent reinforcing parts 511 form a avoidance groove to prevent the swinging of external wires. The swing ring 510 is connected to the male connector housing 1 via a rotating structure, allowing the swing ring 510 to rotate around its axis. The arc-shaped reinforcing parts 511 enhance the axial load-bearing capacity of the swing ring 510, preventing the swing ball 520 from dislodging under large impact forces. The avoidance groove prevents interference between the wire and the edge of the swing ring 510 when the wire swings at large angles, thus expanding the effective swing angle. The rotating structure facilitates adjustment of the wire's swing at different angles.

[0060] Specifically, when the wire swing angle reaches ±45°, the wire enters the avoidance groove between adjacent reinforcement parts 511 and will not interfere with the edge of the swing ring 510. The reinforcement part 511 increases the axial load-bearing capacity of the universal swing assembly 5 by more than 3 times, ensuring that the swing ball 520 will not come out; it can adapt to more complex wiring environments.

[0061] Furthermore, the male connector housing 1 is composed of a first housing 101 and a second housing 102 connected by threads; the axial position of the connection between the first housing 101 and the second housing 102 corresponds to the installation position of the terminal body 6, so that the external wire can be connected to the terminal body 6. The male connector housing 1 is designed as a split structure with two threaded sections connected at the front and rear, and the connection point corresponds exactly to the installation position of the terminal body 6; after disassembly, the terminal body 6 can be directly operated for wiring, which greatly improves wiring efficiency and maintenance convenience.

[0062] Specifically, disassembling the housing: unscrew the second housing 102 (tail housing) to expose the internal terminal body 6; wiring operation: pass the external wire through the universal swing assembly 5, strip the core wire insulation layer, and connect it to the terminal of the terminal body 6, then tighten the wire clamping screw; assembling the housing: screw the second housing 102 back onto the first housing 101, and it is ready for use. Wiring efficiency is improved by 50%: no internal parts need to be disassembled, and wiring can be done directly after disassembly; if the terminal body 6 or the telescopic cable 7 is damaged, it can be replaced simply by disassembling the housing, without replacing the entire male connector.

[0063] In this embodiment, sealing rings are provided between the first housing 101 and the second housing 102, at the connection between the male housing 1 and the female housing 2, at the connection between the swing ring 510 and the male housing 1, and between the swing ring 510 and the swing ball 520, so that the overall sealing performance is not affected.

[0064] Furthermore, both the male connector housing 1 and the female connector housing 2 are provided with anti-slip blocks or protective textures on their outer surfaces. By providing an anti-slip structure on the outer surface of the male and female connector housings 2, the friction between the hand and the housing is increased, making it easier for operators to tighten and loosen the connector, especially in environments where gloves are worn or hands are oily or wet. Effortless operation: Friction is increased by more than 30%, allowing tightening to the specified torque without additional tools; Strong environmental adaptability: Reliable operation is possible even when wearing gloves, in oily or wet environments.

[0065] This application's technical solution features a male connector housing and a female connector housing connected by threads. The male connector housing contains a locking component to prevent the female connector housing from reversing, and an unlocking component to release the lock. The male and female connector housings are electrically connected via a first annular contact component, enabling insertion at any angle. A universal swing component is located at the end of the male connector housing furthest from the female connector housing. This universal swing component includes a swing ring with a spherical inner surface. A swing ball is movably positioned inside the swing ring, with a through-hole for external wires to pass through. A terminal block is located inside the male connector housing for connecting external wires. The terminal block is connected to the annular contact component via a telescopic wire, allowing the external wire to swing in any direction. This design increases the bending fatigue life of the wire by more than 10 times; the connection efficiency of the male and female connectors is increased by 80%, enabling 360° blind insertion without any angle alignment, making it particularly suitable for confined spaces, gloved operation, or nighttime operation; and it increases anti-loosening reliability: it can withstand greater acceleration and random vibration, achieving no loosening and no change in contact resistance.

[0066] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A power connector, characterized in that, Includes male and female housings connected by threads; The male head housing is provided with a locking component to prevent the female head housing from rotating in reverse, and an unlocking component to release the lock; The male head housing and the female head housing are electrically connected by a first annular contact assembly arranged coaxially, enabling insertion connection at any angle. The male head housing is provided with a universal swing assembly at one end away from the female head housing. The universal swing assembly includes a swing ring, the inner surface of which is a spherical surface. A swing ball is movably disposed inside the swing ring, and a wire-passing hole is provided through the swing ball for external wires to pass through. The male connector housing is provided with a terminal body for connecting external wires. The terminal body is connected to the annular contact assembly via a telescopic wire to allow the external wires to swing in any direction.

2. The power connector according to claim 1, characterized in that, The locking assembly includes a ratchet ring, which is mounted in the male head housing via an axial sliding structure. The axial sliding structure is used for axial sliding of the ratchet ring and restricts the rotation of the ratchet ring. Multiple elastic elements are provided between the ratchet ring and the inside of the male head housing. The elastic elements are used to push the ratchet ring to engage with the ratchet teeth on the female head housing.

3. The power connector according to claim 2, characterized in that, The unlocking component includes an unlocking groove formed on the side of the ratchet ring, and the unlocking groove is provided with a first inclined surface. An unlocking button is provided on the outer side of the male connector housing corresponding to the unlocking slot. The unlocking end of the unlocking button penetrates the side wall of the male connector housing and is provided with a second inclined surface. The second inclined surface slides against the first inclined surface to push the ratchet ring away from the female connector housing and to push the unlocking button to reset.

4. The power connector according to claim 1, characterized in that, The first annular contact assembly includes a first contact element and a second contact element; The first contact element is fixedly disposed in the female head housing by the first mounting base, and the plurality of first contact elements are coaxially arranged annular or cylindrical conductors; The male head housing is provided with a second mounting base, and the second mounting base is provided with a matching contact groove corresponding to the first contact member. The second contact member is provided in the contact groove respectively. The second contact is electrically connected to the corresponding retractable wire, and the second contact is used to make contact with the corresponding first contact.

5. The power connector according to claim 4, characterized in that, Each of the contact grooves is provided with a plurality of second contact elements, which are evenly distributed around the axis in a circumferential direction; The second contact element is an arc-shaped elastic sheet made of metal.

6. The power connector according to claim 1, characterized in that, The swing ball extends into the male connector housing along the axis of the wire hole and is provided with a first extension cylinder, and the terminal body is threaded onto the first extension cylinder; The swing ball extends outward from the male connector housing along the axis of the wire hole, and the second extension cylinder is provided with a locking structure for clamping the external wire.

7. The power connector according to claim 1, characterized in that, The terminal body includes a first terminal body and a second terminal body; The first end body is provided with multiple wiring terminals for connecting external wires; The second end body is connected to the telescopic cable; The first end body is rotatably connected to the second end body, and a second annular contact assembly is provided between the first end body and the second end body for electrical connection between the telescopic wire and the external wire.

8. The power connector according to claim 1, characterized in that, The swing ring has multiple arc-shaped reinforcing parts extending from both the inner and outer ends of the male connector housing. The multiple reinforcing parts are evenly distributed around the wire hole in the circumference, and an avoidance groove is formed between adjacent reinforcing parts to avoid the swing of the external wire. The swing ring is connected to the male head housing via a rotating structure, allowing it to swing and rotate around the axis.

9. The power connector according to claim 1, characterized in that, The male head housing is composed of a first housing and a second housing connected by threads; The axial position of the connection between the first housing and the second housing corresponds to the installation position of the terminal body, so that the external wire can be connected to the terminal body.

10. The power connector according to claim 1, characterized in that, Both the male and female housings are provided with anti-slip blocks or protective textures on their outer sides.

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