Industrial communication interface device with anti-falling structure

Abstract

The application relates to the technical field of communication interfaces, in particular to an industrial-grade communication interface device with an anti-falling structure, which comprises a socket and a plug; the plug comprises a core sliding assembly and a radial expansion assembly sleeved outside the core sliding assembly, and is provided with a first elastic reset member for unlocking and resetting; a guide space is arranged in the socket, axial sliding of the core sliding assembly is converted into radial expansion deformation of the radial expansion assembly, and the radial expansion assembly is expanded and tightened on the inner wall of the guide space; a self-locking assembly at the end of the socket is clamped with a limiting assembly on the outer periphery of the core sliding assembly, thereby forming axial stop; an unlocking channel is arranged at the end of the socket, an external unlocking member is pushed into the unlocking channel to drive the self-locking assembly to retreat radially to be unlocked. The orthogonal bidirectional stop mechanism of radial expansion and axial clamping limits axial relative micro-motion within a given tolerance and reduces the micro-motion abrasion risk.

Description

Technical Field

[0001] This invention relates to the field of communication interface technology, specifically to an industrial-grade communication interface device with an anti-detachment structure. Background Technology

[0002] In the field of industrial automation control and equipment interconnection, industrial edge computing gateways are typically equipped with multiple communication interfaces for establishing communication connections with sensors, control devices, and other industrial network devices. External communication cables are usually plugged into sockets located on the gateway housing, and the connection is maintained by a locking structure between the plug and socket, thereby achieving stable transmission of communication signals.

[0003] Existing industrial communication interfaces typically employ structures such as elastic snaps, locking protrusions, or threaded locking to restrict the axial movement of the plug relative to the socket. These structures can meet basic plug-in retention requirements under normal static operating conditions. However, communication cables in industrial environments usually have a certain length and weight, and may be subject to vibrations from equipment operation, cable weight, cable chain movement, and pulling forces from personnel or other equipment. This causes external mechanical loads to be transmitted through the cable and plug housing to the connection area between the plug and socket.

[0004] Under continuous vibration and cable tension, the plug is not only susceptible to axial tension along the insertion direction, but also to radial loads and deflection torques due to cable offset. When these alternating loads continuously act on traditional snap-fit ​​or elastic locking structures, the locking components may undergo slight elastic deformation, wear, or relative displacement, causing the plug to retract or deflect relative to the socket. This leads to a decrease in contact pressure and a change in relative position between the contacts. As the contact condition deteriorates, the contact reliability of the communication interface decreases, resulting in momentary interruptions in communication signals.

[0005] To address this, an industrial-grade communication interface device with an anti-detachment structure is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide an industrial-grade communication interface device with an anti-detachment structure. This invention solves the problem that industrial communication interfaces are prone to axial fretting wear under severe vibration and cable tension, leading to instantaneous signal interruption. By utilizing the orthogonal force cooperation of the radial expansion component and the self-locking block to construct a bidirectional stopping mechanism, and setting up a differential cable feeding mechanism between the inner and outer cylinders to construct an efficient collaborative method of first correcting the deviation and then synchronously expanding and tightening the connection, this invention achieves the purpose of eliminating the axial clearance of the interface to resist vibration and prevent detachment, physically isolating the needle-shaped contact parts from external mechanical stress, and ensuring continuous and stable communication connection under harsh working conditions.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An industrial-grade communication interface device with an anti-detachment structure includes a compatible socket and a plug. The plug includes a core sliding assembly and a radial tightening assembly sleeved outside the core sliding assembly. The plug has a first elastic reset member that abuts against the core sliding assembly to drive the core sliding assembly to reset upon unlocking. The socket has a guide space inside, and the core sliding assembly is drively connected to the radial tightening assembly to convert the axial sliding of the core sliding assembly toward the socket direction into radial tightening. The component's radial expansion deforms and tightens against the inner wall of the guide space; the socket end is provided with a self-locking component, and the outer periphery of the core sliding component is provided with a limiting component. The self-locking component engages and abuts against the limiting component to form an axial stop on the core sliding component away from the socket direction when the radial expansion component is in the expansion state; the socket end is provided with an axially extending release channel, and the force-bearing part of the self-locking component is exposed in the release channel so that when an external release component is pushed in, it drives the self-locking component to radially retract and disengage from the limiting component.

[0008] Existing industrial connectors typically maintain connection through threaded engagement or surface spring clips. Long-term vibration can cause thread slippage or spring fatigue, leading to axial backlash. This solution converts the insertion action into mechanical radial deformation tightening. A radial tightening component 22 compensates for micro-assembly gaps and absorbs high-frequency mechanical vibration. An independently configured self-locking component forms a rigid stop in the axial direction orthogonal to the tightening direction. When the external cable is pulled in different directions, the tensile load does not create a component force that drives the clip to radially slip and unlock. A reverse thrust must be applied through a specific unlocking channel to release the lock, thus preventing slippage caused by vibration.

[0009] Preferably, the radial expansion assembly comprises multiple support seats arranged in a circumferential array, a transmission link movably connected between the support seats and the core sliding assembly, and flexible expansion rings sleeved on the outer sides of the multiple support seats. The two ends of the transmission link are respectively hinged to the inner side of the core sliding assembly and the corresponding support seat via rotating pins; the support seat has a stepped cross-section, its outer wall has a flat support surface for supporting the flexible expansion ring, and its end has a sliding block. A limiting groove is provided on the inner wall of the guide space, and the sliding block slides and guides in the limiting groove; when the core sliding assembly moves axially, the transmission link drives the support seats to move radially, causing the flexible expansion ring to expand and fit against the inner wall of the guide space.

[0010] Unlike the direct compression of wedge blocks, this structure uses a linkage mechanism with a rotating pin to transmit axial thrust and outputs uniform radial positive pressure from multiple circumferentially distributed points of application. The stepped support base utilizes sliding blocks to provide rigid guidance and flat support surfaces to support the flexible tightening ring, thus differentiating the guiding part from the flexible support part and reducing direct friction between the flexible part and the rigid guiding surface, and the resulting premature damage.

[0011] Preferably, the flat support surface of the support base is provided with limiting blocks at both ends of the axial direction, and the flexible expansion ring is located between the limiting blocks on both sides of the same support base; the end face of the limiting block abuts against the corresponding axial end face of the flexible expansion ring, and restricts its axial extension when the flexible expansion ring expands radially, so that the deformation is concentrated radially.

[0012] The flexible expansion ring may slip axially when subjected to radial pressure and friction. The limiting blocks on both sides block the axial movement of the flexible expansion ring, thereby limiting the axial movement of the flexible expansion ring during repeated expansion and resetting, so as to maintain the stability of the bearing position.

[0013] Preferably, the core sliding assembly includes an external thrust cylinder and a cable carrier cylinder. The cable carrier cylinder is coaxially sleeved within the external thrust cylinder and can slide relative to it. The power input end of the transmission link is movably hinged to the outer periphery of the external thrust cylinder. The external thrust cylinder has a through hole, and a locking node is provided within the through hole for the external communication cable to pass through and be axially bound. The inner hole of the cable carrier cylinder forms a clearance channel for the communication cable to pass through and move smoothly. A relative sliding tolerance is reserved between the external thrust cylinder and the cable carrier cylinder. The two, together with the communication cable, form a differential cable feeding mechanism for allowing the end of the communication cable to protrude and connect with the electrical interface inside the socket.

[0014] In conventional insertion processes, the lack of reliable pre-emptive attitude constraints for mechanical alignment and electrical contact can easily lead to pin breakage due to stress. This solution optimizes the insertion logic using a differential mechanism: after the front end of the cable carrier cylinder abuts against the inside of the socket to achieve circumferential and axial attitude positioning, the external thrust cylinder overcomes resistance and slides relative to the cable. This relative sliding acts as a single power source, synchronously driving the external linkage mechanism to complete mechanical tightening and enveloping the end of the internal communication cable for deep electrical connection. This ensures that electrical contact only occurs synchronously after the mechanical attitude has completed preliminary circumferential guidance and angular constraints, preventing the pin-shaped contact from breaking under pressure when blind insertion is misaligned.

[0015] Preferably, the first elastic reset member is disposed in an annular cavity formed by splicing the external thrust cylinder and the cable carrier cylinder, with its two axial ends respectively abutting against the opposite surfaces of the external thrust cylinder and the cable carrier cylinder.

[0016] After the first elastic reset component moves from its exposed position to the internally enclosed coaxial annular cavity, the reset bias force can be evenly distributed along the circumference, avoiding radial deviation and jamming during the retraction process; the annular cavity also isolates the first elastic reset component from dust particles and corrosive media in the industrial environment to maintain the sensitivity of the reset mechanism in long-term operation.

[0017] Preferably, the limiting component includes a chuck installed on the outer periphery of the external thrust cylinder; the side of the chuck facing the insertion direction is provided with a guide chamfer, and the outer periphery of the chuck is provided with a limiting protrusion.

[0018] The continuous circumferential surface of the chuck forms a circumferential locking surface, which can reduce the insertion angle requirements for blind insertion operations; the guide chamfer set on the mating side is used to reduce insertion resistance, and the vertical end face on the back side of the chuck serves as a rigid stop to withstand axial pull-out loads.

[0019] Preferably, the self-locking assembly includes a sliding recess formed at the end of the socket, the sliding recess extending perpendicular to the release channel; a self-locking block is slidably disposed within the sliding recess, its top end face extending obliquely towards the release channel to form a yielding slope. A second elastic reset assembly is provided between the bottom of the sliding recess and the bottom end face of the self-locking block, the self-locking block having a T-shaped structure.

[0020] The sliding trough radially accommodates the self-locking block, which in turn intercepts the chuck axially. Since their directions of action are orthogonal, external tensile loads do not create a radial component that drives the self-locking block to unlock. The T-shaped self-locking block limits the maximum ejection stroke to prevent it from disengaging from the sliding trough during equipment transport or under strong vibration conditions.

[0021] Preferably, the unfastening channel has a guide groove formed outward along the axial direction; the limiting protrusion and the guide groove have parallel extension trajectories and slide guide each other, constraining the circumferential insertion angle of the plug before the radial tightening assembly enters the guide space and generates friction.

[0022] The aforementioned guiding fit begins to function at the initial stage of insertion, serving to withstand the circumferential torsional load generated when the plug is about to be inserted, reducing the transmission of this torsional torque to the deeper radial tightening components or electrical connection ends, and ensuring that subsequent mechanical actions maintain the corresponding circumferential phase.

[0023] Preferably, the communication cable end is fixed with a terminal support base, and multiple pin-shaped contacts electrically connected to the communication cable are arranged parallel to each other along the plug insertion direction on the terminal support base. The internal electrical interface of the socket includes an interface isolation block disposed deep in the guide space, and multiple blind-hole-shaped contact ports are formed on the interface isolation block. The spatial arrangement of the blind-hole-shaped contact ports is adapted to the pin-shaped contacts. The axial extension stroke of the terminal support base matches the relative sliding stroke of the external thrust cylinder, so that the multiple pin-shaped contacts simultaneously enter the corresponding blind-hole-shaped contact ports axially, thereby establishing a signal connection.

[0024] The slender needle-shaped contact element mates with the deep-hole blind-hole contact port, creating an axial depth tolerance between them. The interface isolation block is located deep within the guide space, allowing the needle-shaped contact element to enter the blind-hole contact port after the housing has completed mechanical alignment. When the housing experiences slight displacement due to high-frequency stress, the contact area between the needle-shaped contact element and the blind-hole contact port remains within the effective conduction depth range.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention utilizes radial forced expansion and axial mechanical engagement in mutually orthogonal directions to form a bidirectional stop where the front end is prevented from moving forward by a flexible expansion element, and the rear end is prevented from moving backward by a rigid locking block. The radial expansion of the flexible expansion ring compensates for the mechanical clearance at the interface, effectively reducing the axial relative micro-movement of the plug within the socket. This reduces wear caused by axial micro-movement under severe vibration conditions, as well as the resulting decrease in contact reliability and momentary signal interruption, improving the connection stability of the interface under high-frequency vibration and axial tensile loads.

[0026] 2. In this invention, a differential cable feeding mechanism is formed by the relative sliding tolerance between the inner and outer cylinders and the locking node. During the insertion process, the cable carrier cylinder is in a relatively static state after contacting the socket, and the outer thrust cylinder synchronously drives the mechanical expansion of the periphery and the electrical insertion of the inner core. This structure ensures that fragile electrical contact components such as probes are deeply axially inserted only when the mechanical posture of the plug has been completely corrected and restricted, in sync with the locking action of the outer shell. This not only simplifies the operation stroke but also effectively avoids the risk of bending, breaking, or misalignment of slender needle-shaped contact components due to lateral oblique forces in complex blind insertion environments, greatly improving the mechanical damage resistance of electrical connection components.

[0027] 3. In this invention, before the radial expansion assembly of the plug contacts the guide space and generates friction, the limiting protrusion on the outer periphery of the plug has entered the guide groove extending outward from the unlocking channel and slides and guides it; this structure first guides and corrects the circumferential insertion posture of the plug, and the side wall of the guide groove bears the circumferential torsional load during the insertion preparation stage, reducing the transmission of torsional torque to the radial expansion assembly and electrical docking area, thereby making the insertion action smooth and protecting the internal structure. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall isometric structure of the present invention; Figure 2 This is the overall right view of the present invention; Figure 3 For the present invention Figure 2 Sectional view at point AA; Figure 4 For the present invention Figure 2 Sectional view at point BB; Figure 5 This is an overall front view of the present invention; Figure 6 For the present invention Figure 5 Sectional view at point CC.

[0029] In the diagram: 1. Socket; 11. Guide space; 111. Limiting groove; 12. Self-locking component; 121. Sliding groove; 122. Self-locking block; 123. Second elastic reset component; 13. Unlocking channel; 131. Guide groove; 14. Interface isolation block; 2. Plug; 21. Core sliding component; 211. External thrust cylinder; 212. Cable carrier cylinder; 22. Radial expansion component; 221. Support base; 222. Sliding block; 223. Limiting block; 224. Transmission link; 225. Rotating pin; 226. Flexible expansion ring; 23. First elastic reset component; 24. Limiting component; 241. Chuck; 2411. Limiting protrusion; 25. Terminal bearing base. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1 to 6 This invention provides an industrial-grade communication interface device with an anti-detachment structure, the technical solution of which is as follows: An industrial-grade communication interface device with an anti-detachment structure includes a matching socket 1 and a plug 2. The plug 2 includes a core sliding assembly 21 and a radial tightening assembly 22 sleeved on the outside of the core sliding assembly 21. The plug 2 has a first elastic reset member 23, which abuts against the core sliding assembly 21 to drive the core sliding assembly 21 to reset when unlocked. The socket 1 has a guide space 11 inside, and the core sliding assembly 21 is kinetically connected to the radial tightening assembly 22 to convert the axial sliding of the core sliding assembly 21 toward the socket 1 into the radial tightening assembly. The radial expansion of the 22 deforms and tightens against the inner wall of the guide space 11; the end of the socket 1 is provided with a self-locking component 12, and the outer periphery of the core sliding component 21 is provided with a limiting component 24. The self-locking component 12 engages and abuts against the limiting component 24 to form an axial stop on the core sliding component 21 away from the socket 1 when the radial expansion component 22 is in the expansion state; the end of the socket 1 is provided with an axially extending release channel 13, and the force-bearing part of the self-locking component 12 is exposed in the release channel 13 so that when the external release component is pushed in, it drives the self-locking component 12 to radially retract and disengage from the limiting component 24; Furthermore, the core sliding component 21 of the plug 2 can be made of aerospace-grade aluminum alloy or high-strength stainless steel by CNC precision machining to withstand mechanical fatigue under high-frequency vibration; the pre-tightening force of the first elastic reset component 23 is determined according to the overall weight of the plug 2 component and the running acceleration of the industrial robot or equipment, so that mis-locking will not occur under normal cable dragging conditions, and can smoothly retract when a specific external release component is pushed into the release channel 13; When plug 2 is connected to socket 1, the operator pushes plug 2 towards socket 1. The core sliding component 21 inside plug 2 slides axially. This axial sliding motion is converted into radial expansion deformation of radial expansion component 22, forcing radial expansion component 22 to expand outward and abut against the inner wall of guide space 11 inside socket 1. The deformation compression between the structures effectively reduces the mechanical gap between the joint interface, thereby improving the physical connection stability of the interface device under vibration conditions. As core sliding component 21 moves forward into place, the limiting component 24 set on its outer periphery passes over the self-locking component 12 at the end of socket 1. The self-locking component 12 resets and forms a mechanical engagement with the limiting component 24, thereby forming an axial rigid stop away from socket 1 for core sliding component 21 in the expanded state. The structural cooperation of radial forced expansion and axial mechanical engagement enhances the anti-dislodgement ability of the interface when subjected to axial tensile load. When disconnection is required, the operator pushes the external release mechanism into the release channel 13 extending axially at the end of the socket 1. The release mechanism pushes inward and continuously presses against the force-bearing part of the self-locking component 12 exposed in the release channel 13, forcibly driving the self-locking component 12 to overcome resistance and radially retract, thereby releasing its axial stop restraint with the limiting component 24. At the moment of release, the first elastic reset component 23, which normally abuts against the core sliding component 21, releases the elastic deformation energy accumulated during the insertion process, actively driving the core sliding component 21 to reset and retract backward, simultaneously driving the radial expansion component 22 to contract and detach from the inner wall of the guide space 11, so that the plug 2 can be smoothly separated from the socket 1, maintaining the connection strength of the device while ensuring the smoothness of the insertion and removal operation.

[0032] The reason this invention abandons the conventional design of a built-in unlock button and instead requires an external unlocking component in conjunction with the unlocking channel 13 for operation is to construct a safety protection structure to prevent accidental touches. In heavy-duty industrial environments, environments with high-density wiring, or environments where there is external material impact, the force-bearing part of the self-locking block 122 is deeply embedded in the narrow unlocking channel 13, physically isolating it from unintentional touches by operators or adjacent objects, effectively reducing unexpected unlocking and communication interruption accidents caused by accidental impacts or friction.

[0033] As one embodiment of the present invention, refer to Figures 3-6The radial expansion assembly 22 includes a plurality of support seats 221 arranged in a circumferential array and a transmission link 224 movably connected between the support seats 221 and the core sliding assembly 21. A flexible expansion ring 226 is nested around the periphery of the plurality of support seats 221. The two ends of the transmission link 224 are respectively hinged to the inner sides of the core sliding assembly 21 and the support seats 221 via rotating pins 225. The support seat 221 has a stepped cross-section, with its outer wall forming a flat support surface for supporting the flexible expansion ring 226, and a sliding block 222 protruding from its end. The inner wall of the guide space 11 has a limiting groove 111 that slides and guides the sliding block 222. When the sliding block 222 is positioned within the limiting groove 111, the support seat 221 is axially locked relative to the guide space 11. At this time, the length of the flat support surface of the support seat 221 is equal to the length of the guide space 11. When the core sliding assembly 21 undergoes relative axial movement, the transmission link 224 can drive the support base 221 to undergo pure radial movement, thereby expanding the deformation of the flexible expansion ring 226 and fully expanding it to fit the entire guide space 11. Limiting blocks 223 are fixed at both ends of the flat support surface of the support base 221 along the axial direction, and the flexible expansion ring 226 is constrained and placed between the two limiting blocks 223 on both sides of the support base 221. The end face of the limiting block 223 abuts against the axial end face of the flexible expansion ring 226, thereby limiting the axial movement of the flexible expansion ring 226 relative to the support base 221 during repeated expansion and resetting, so as to maintain the stability of the bearing position.

[0034] During the insertion and locking process of the interface device, as the core sliding assembly 21 is subjected to force and undergoes axial sliding, the transmission link 224, which is movably hinged between the core sliding assembly 21 and the inner side of the support base 221, is forced to deflect around the rotating pin 225. This transmission link 224 converts the input axial displacement into the radial outward expansion movement of multiple support bases 221 distributed in a circumferential array. During the radial outward expansion of the support base 221, the sliding block 222 protruding at its end slides along the limiting groove 111 on the inner wall of the guide space 11. The movement trajectory of the support base 221 is constrained by the guiding cooperation between the slider and the groove to maintain the stability of the radial movement and reduce skewness. As the support base 221 expands outward, its The flat support surface of the outer wall of the stepped bearing structure pushes against the outer nested flexible expansion ring 226 from the inside out. Since the end faces of the limiting blocks 223 fixed at both ends of the flat support surface of the support base 221 directly abut against the axial end faces of the flexible expansion ring 226, the axial slippage and movement of the flexible expansion ring 226 under radial pressure and frictional resistance are prevented, ensuring the stability of the bearing coverage area of ​​the flexible component. This, in turn, causes the flexible expansion ring 226 to be fully pressed against the inner wall of the guide space 11. Through the transmission conversion of the mechanical linkage and the physical constraint of the limiting block 223, the radial deformation efficiency of the flexible ring and the expansion and fixing strength of the interface structure inside the guide space 11 are improved.

[0035] The flexible expansion ring 226 can be made of fluororubber elastomer material with a Shore hardness between 60A and 80A; the positional stability of the flexible expansion ring under high-frequency insertion and removal and vibration conditions is ensured by the physical blocking of the limit blocks 223 on both sides.

[0036] As one embodiment of the present invention, refer to Figure 3The core sliding assembly 21 includes an external thrust cylinder 211 and a cable carrier cylinder 212 coaxially nested and sliding inside the external thrust cylinder 211. The power input end of the transmission link 224 is movably hinged to the outer periphery of the external thrust cylinder 211. The communication cable passes through the external thrust cylinder 211 and is fixedly connected to it. The inner hole of the cable carrier cylinder 212 is formed as a clearance channel for the communication cable to pass through and slide. Since the size of the communication cable is adapted to the inner diameter of the cable carrier cylinder 212, the inner wall of the clearance channel will form a continuous radial constraint on the communication cable along its entire length, reducing the risk of instability of the flexible communication cable when subjected to axial thrust. The external thrust cylinder 211 and the cable carrier cylinder 212 have a relative sliding tolerance, and together with the communication cable, they form a differential cable feeding mechanism to drive the end of the communication cable to extend and connect with the internal electrical interface of the socket 1; the first elastic reset member 23 is housed in the annular cavity formed by splicing the external thrust cylinder 211 and the cable carrier cylinder 212, and the axial ends of the first elastic reset member 23 are respectively pressed against the surfaces of the two; the first elastic reset member 23 is preferably made of chromium-silicon alloy spring steel; the annular cavity physically isolates dust particles and oil stains in the industrial environment, maintains the long-term sensitivity of the reset system, and makes the bias force evenly distributed along the circumference. During the interface docking operation, an external axial thrust acts on the external thrust cylinder 211, causing it to move forward. The cable carrier cylinder 212 abuts against the inner wall of the socket 1. The external thrust cylinder 211 outputs power outward through the transmission connecting rod 224 hinged to its outer periphery. Simultaneously, it utilizes the relative sliding tolerance between itself and the coaxially nested cable carrier cylinder 212 to slide relative to the outside of the cable carrier cylinder 212. Since the external communication cable is fixedly connected to the external thrust cylinder 211, and the inner hole of the cable carrier cylinder 212 forms a clearance channel for the cable to pass smoothly through, the relative sliding of the external thrust cylinder 211 transmits the thrust without loss through the communication cable, causing the communication cable to move forward synchronously along the clearance channel. This differential cable delivery mechanism structure... The connection drives the end of the communication cable to extend in time and connect with the internal electrical interface of the socket 1, thereby achieving a high degree of coordination between the initial posture correction of the plug 2 and the subsequent mechanical tightening and electrical connection actions. During this relative sliding action, the first elastic reset member 23 (which can be made of chromium silicon alloy spring steel) is squeezed at both ends and undergoes elastic deformation in the annular cavity formed by the splicing of the external thrust cylinder 211 and the cable carrier cylinder 212. The annular cavity prevents the direct intrusion of dust particles, which is conducive to maintaining the long-term action sensitivity of the reset system. At the same time, the coaxial annular spatial layout allows the bias force of the elastic reset member under pressure to be evenly distributed along the circumference, thereby improving the force balance and guiding stability of the core sliding component 21 during the reciprocating motion.

[0037] As one embodiment of the present invention, refer to Figures 3-6The limiting component 24 includes a chuck 241 disposed on the outer periphery of the external thrust cylinder 211. The chuck 241 has a guide chamfer on its insertion side and a limiting protrusion 2411 on its outer periphery. The unfastening channel 13 extends axially outward with a guide groove 131. The extension trajectory of the limiting protrusion 2411 is parallel to the extension trajectory of the guide groove 131, and the two are in a sliding guide engagement to constrain the circumferential insertion angle of the plug 2 before the radial tightening component 22 enters the guide space 11 and generates friction. This absorbs the circumferential torsional stray force received by the plug 2 during the pre-insertion stage in advance and cuts off the transmission of destructive torque to the deep connection area. The self-locking component 12 includes a sliding groove 121 embedded at the end of the socket 1, extending perpendicularly to the unlocking channel 13. A self-locking block 122 is slidably installed in the sliding groove 121, and the top end face of the self-locking block 122 extends obliquely toward the unlocking channel 13 to form a yielding slope. A second elastic reset component 123 is provided between the bottom of the sliding groove 121 and the bottom end face of the self-locking block 122. The self-locking block 122 has a T-shaped structure. The tilt angle of the yielding slope is preferably configured to be 15° to 30°. The force-saving effect of the wedge-shaped slope makes the unlocking operation easier. At the same time, the T-shaped self-locking block 122 limits the limit of the block ejection and prevents it from falling and being lost.

[0038] In the initial stage of the plug 2 being inserted into the socket 1, the limiting protrusion 2411 on the side of the plug 2 first makes physical contact with the guide groove 131 extending outward along the unhooking channel 13 at the end of the socket 1. Since the structural extension trajectory of the limiting protrusion 2411 is parallel to the extension trajectory of the guide groove 131, the two establish a smooth sliding guide engagement relationship under the action of axial thrust. This preliminary sliding guide process occurs before the radial tightening component 22 inside the plug 2 extends into the guide space 11 of the socket 1 and generates substantial contact friction, relying on the prior... The limiting protrusion 2411 and the guide groove 131 fit together to constrain and correct the circumferential insertion posture of the plug 2. This allows the circumferential torsional stray force on the plug 2 during the pre-alignment and initial sliding stages to be borne and consumed in advance by the rigid sidewall of the guide groove 131. This limits the transmission of such torsional torque along the axial direction to the inner radial expansion assembly 22 and deeper electrical connection areas. This helps to reduce the probability of deep docking components deforming or being damaged due to torsion under complex working conditions, and improves the smoothness of the overall interface device's insertion action and structural safety. During the subsequent insertion and advancement of the communication interface device, the chuck 241, located on the outer periphery of the external thrust cylinder 211, moves axially synchronously with the cylinder. The limiting protrusions 2411 distributed on the outer periphery of the chuck 241 continuously form a sliding engagement with the guide groove 131 and other structures on the socket 1 side in the insertion path, providing full-stroke physical constraint on the circumferential orientation of the plug 2 during its axial advancement. Simultaneously, the guide chamfer configured on the insertion side of the chuck 241 first makes sliding contact with the self-locking block 122 on the socket 1 side, gradually overcoming the resistance of the mating components by utilizing the physical guidance effect of the smooth transition of the inclined surface, thereby reducing the mechanical insertion resistance when the external thrust cylinder 211 moves forward. After the chuck 241 completely passes the self-locking block 122, the self-locking block 122 rebounds and falls into the back side of the chuck 241, achieving spatial position matching accuracy and smooth operation of the chuck 241 as a whole during the sliding and final locking stages. In this final locked state, the radial expansion component 22 inside the plug 2 reaches its expansion limit within the guide space 11 and fits against the inner wall. Utilizing the radial contact pressure and interface friction generated by flexible deformation, it increases the mechanical resistance to further forward movement and radial displacement of the plug 2. Simultaneously, the self-locking block 122 at the rear end forms a rigid abutment with the back side of the chuck 241, restricting the backward movement of the plug 2. This two-way force cooperation of "flexible expansion at the front end increasing resistance and rigid block at the rear end restricting backward movement" can effectively limit the axial relative micro-movement of the plug 2 inside the socket 1 within the specified tolerance range, reducing the possibility of wear on the contact parts due to repeated micro-movements under vibration conditions. While ensuring smooth insertion, it also improves the structural holding force and signal transmission stability of the device under tension.

[0039] As one embodiment of the present invention, refer to Figure 6The end of the communication cable is fixed with a terminal support base 25. Multiple needle-shaped contacts that are electrically connected to the communication cable are arranged in a parallel array along the pushing direction of the plug 2 on the terminal support base 25. The internal electrical interface of the socket 1 includes an interface isolation block 14 embedded deep in the guide space 11. The interface isolation block 14 has blind hole-shaped contact openings that are adapted to the spatial arrangement of the needle-shaped contacts. Each blind hole-shaped contact opening is embedded with a female conductive contact. The female conductive contact is electrically connected to the communication line inside the socket 1. The axial extension stroke of the terminal support base 25 matches the relative sliding stroke of the external thrust cylinder 211, so as to drive multiple needle-shaped contacts to simultaneously axially insert into the corresponding blind hole-shaped contact openings to establish a signal connection.

[0040] During the deep electrical connection operation of the interface device, as the external thrust cylinder 211 overcomes resistance and slides relative to the inside of the mechanism, it simultaneously wraps around the communication cable and the terminal support base 25 fixed at its end, causing axial displacement along the pushing direction of the plug 2. During this pushing stroke, multiple pin-shaped contacts are synchronously and orderly axially inserted into the corresponding blind hole-shaped contact holes under the drive of the base, and form an elastic interference fit with the internal female conductive contact. Through the mechanical alignment of the three-dimensional spatial arrangement of the pin holes and the elastic clamping between the metal terminals, a stable signal connection is established between the plug 2 and the socket 1. With the circumferential physical shielding provided by the deep-buried structure of the interface isolation block 14, the probability of the pin-shaped contacts bending or misaligning due to lateral bias force in complex insertion environments is reduced, thereby improving the resistance of electrical contact components to mechanical damage during reciprocating high-frequency insertion and removal.

[0041] Working principle: In the initial stage of plug 2 being inserted into socket 1, the limiting protrusion 2411 on the side of plug 2 enters the guide groove 131 at the end of socket 1 first. Relying on the sliding guide cooperation between the two, the circumferential insertion posture of plug 2 is forcibly constrained and physically corrected.

[0042] After the initial correction is completed, the operator continues to apply axial thrust. The front end of the cable carrier cylinder 212 is blocked and stops moving forward as it abuts against the inside of the guide space 11 of the socket 1. At this time, the thrust is continued to be applied. The external thrust cylinder 211 overcomes the resistance of the internal first elastic reset member 23 and slides relative to the outside of the cable carrier cylinder 212 by utilizing the relative sliding tolerance between itself and the cable carrier cylinder 212.

[0043] This relative sliding process is driven by the external thrust cylinder 211 as a single power source, simultaneously driving the following two actions: On the one hand (mechanical expansion): the forward movement of the external thrust cylinder 211 causes the movable hinged transmission link 224 to deflect, driving the support seat 221 and the sliding block 222 at its end to move radially outward along the limiting slide groove 111, forcing the flexible expansion ring 226 to expand outward and press against the inner wall of the guide space 11, eliminating the mechanical gap at the joint interface. On the other hand (electrical connection): When the external thrust cylinder 211 slides relative to the communication cable, it drives the communication cable to move forward through the fixed connection with the communication cable; during this force transmission process, the inner hole of the cable carrier cylinder 212 provides a continuous radial rigid constraint on the communication cable along its entire length, so that the compressed communication cable forms a restricted pressure bar and does not experience radial buckling instability, thereby accurately transmitting the axial displacement of the external thrust cylinder 211 to the terminal bearing base 25, so that the needle-shaped contact enters the corresponding blind hole-shaped contact port.

[0044] Under the premise of ensuring that the initial insertion posture has been strictly corrected and constrained, this device uses a single axial thrust to simultaneously complete the radial mechanical locking of the periphery and the deep electrical insertion of the interior, achieving a high degree of coordination between mechanical and electrical actions.

[0045] During the final stroke of the external thrust cylinder 211, the chamfered guide on the insertion side of its outer circumferential chuck 241 overcomes the resistance of the self-locking block 122 at the end of the socket 1. After the chuck 241 completely passes the self-locking block 122, the self-locking block 122 rebounds and falls into the continuous circumferential locking plane on the back side of the chuck 241, forming a mechanical engagement. At this time, the radial expansion component 22 at the front end of the plug 2 reaches the expansion limit and fits against the inner wall, increasing the resistance to the plug 2 continuing to move forward. Meanwhile, the self-locking block 122 at the rear end rigidly abuts against the back side of the chuck 241, restricting the path of the plug 2 retraction. Relying on the bidirectional force cooperation of "flexible expansion at the front end increasing resistance and rigid block at the rear end restricting retraction", the axial relative micro-movement inside the socket 1 is effectively reduced, reducing the risk of decreased contact reliability and instantaneous signal interruption caused by repeated micro-movement of the contact parts under vibration conditions.

[0046] When disconnection is required, the operator pushes the external release mechanism into the release channel 13 at the end of the socket 1. The release mechanism continuously presses against the yielding ramp of the self-locking block 122, using the wedge effect of the ramp to convert the axial thrust into a radial component force, driving the self-locking block 122 to overcome the resistance of the second elastic reset component 123 and radially yield and settle, releasing its axial stop restraint with the chuck 241. At the instant the lock is released, the first elastic reset member 23, housed in the annular cavity, releases its accumulated elastic deformation energy, actively driving the external thrust cylinder 211 to retract. This retraction action simultaneously retracts the needle-shaped contact member and drives the transmission link 224 to pull the support seat 221 in the opposite direction to contract, causing the flexible tightening ring 226 to disengage from the inner wall of the guide space 11, and finally the plug 2 can be smoothly separated. It should be noted that the external unlocking component used in conjunction with the device of the present invention for unlocking can be a conventional disassembly structure such as a ring with an axial opening or a semi-enclosed fork-shaped push rod. This external unlocking component itself is prior art in the field and is not the core improvement point of the present invention.

[0047] 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. An industrial-grade communication interface device with an anti-detachment structure, comprising a compatible socket (1) and a plug (2), characterized in that: The plug (2) includes a core sliding assembly (21) and a radial tightening assembly (22) sleeved on the outside of the core sliding assembly (21); the plug (2) has a first elastic reset member (23) abutting against the core sliding assembly (21) to drive the core sliding assembly (21) to reset when unlocked; The socket (1) has a guide space (11) inside. The core sliding component (21) is connected to the radial expansion component (22) so that the axial sliding of the core sliding component (21) toward the socket (1) is converted into the radial expansion deformation of the radial expansion component (22) and expanded to the inner wall of the guide space (11). The socket (1) is provided with a self-locking component (12) at its end, and a limiting component (24) is provided on the outer periphery of the core sliding component (21). The self-locking component (12) and the limiting component (24) engage and abut against each other so that when the radial expansion component (22) is in the expanded diameter state, it forms an axial stop on the core sliding component (21) away from the socket (1). The socket (1) has an axially extending release channel (13) at its end. The force-bearing part of the self-locking component (12) is exposed in the release channel (13) so that when the external release component is pushed in, it can drive the self-locking component (12) to retract radially and disengage from the limiting component (24).

2. The industrial-grade communication interface device according to claim 1, characterized in that: The radial expansion assembly (22) includes a plurality of support seats (221) arranged in a circumferential array and a transmission link (224) movably connected between the support seats (221) and the core sliding assembly (21). A flexible expansion ring (226) is nested around the periphery of each of the support seats (221). The two ends of the transmission link (224) are respectively hinged to the inner sides of the core sliding assembly (21) and the support seats (221) via rotating pins (225). The cross-section of the support seat (221) is... The stepped bearing structure has a flat support surface formed on its outer side wall to support the flexible expansion ring (226), and a sliding block (222) protrudes from its end; the inner wall of the guide space (11) is provided with a limiting groove (111) that slides and guides the sliding block (222); the transmission link (224) can convert the axial movement of the core sliding assembly (21) into the radial movement of the support seat (221) to expand the deformation of the flexible expansion ring (226) and fit it into the guide space (11).

3. The industrial-grade communication interface device according to claim 2, characterized in that: Limiting blocks (223) are fixed at both ends along the axial direction on the flat support surface of the support base (221), and the flexible expansion ring (226) is constrained and placed between the two limiting blocks (223) on both sides of the support base (221). The end face of the limiting block (223) abuts against the axial end face of the flexible expansion ring (226) to limit the axial movement of the flexible expansion ring (226) relative to the support base (221) during repeated expansion and reset, so as to maintain the stability of the bearing position.

4. The industrial-grade communication interface device according to claim 2, characterized in that: The core sliding assembly (21) includes an external thrust cylinder (211) and a cable carrier cylinder (212) that is coaxially nested and slides inside the external thrust cylinder (211). The power input end of the transmission link (224) is movably hinged to the outer periphery of the external thrust cylinder (211). The communication cable passes through the clearance channel between the external thrust cylinder (211) and the cable carrier cylinder (212) and is continuously radially constrained by the inner wall of the clearance channel. The external thrust cylinder (211) drives the communication cable forward during relative sliding through its fixed connection with the communication cable. The clearance channel is used to restrict the radial buckling of the communication cable during relative sliding so as to transmit the axial displacement of the external thrust cylinder (211) to the end of the communication cable.

5. The industrial-grade communication interface device according to claim 4, characterized in that: The first elastic reset member (23) is housed in the annular cavity formed by splicing the external thrust cylinder (211) and the cable carrier cylinder (212), and the two axial ends of the first elastic reset member (23) are respectively pressed against the surfaces of the two.

6. The industrial-grade communication interface device according to claim 4, characterized in that: The limiting component (24) includes a chuck (241) disposed on the outer periphery of the external thrust cylinder (211), the chuck (241) having a guide chamfer on the insertion side, and a limiting protrusion (2411) on the outer periphery of the chuck (241).

7. The industrial-grade communication interface device according to claim 4, characterized in that: The self-locking component (12) includes a sliding groove (121) embedded in the end of the socket (1) and perpendicular to the release channel (13). The self-locking block (122) is slidably installed in the sliding groove (121), and the top end face of the self-locking block (122) extends obliquely toward the release channel (13) to form a yielding slope. A second elastic reset component (123) is provided between the bottom of the sliding groove (121) and the bottom end face of the self-locking block (122). The self-locking block (122) has a T-shaped structure.

8. The industrial-grade communication interface device according to claim 6, characterized in that: The release channel (13) extends outward along the axial direction with a guide groove (131). The extension trajectory of the limiting protrusion (2411) is parallel to the extension trajectory of the guide groove (131) and the two are in sliding guide engagement to constrain the circumferential insertion angle of the plug (2) before the radial tightening assembly (22) enters the guide space (11) and generates friction.

9. The industrial-grade communication interface device according to claim 4, characterized in that: The end of the communication cable is fixed with a terminal support base (25), and the terminal support base (25) has a plurality of needle-shaped contacts that are electrically connected to the communication cable arranged in a parallel array along the push direction of the plug (2); the internal electrical interface of the socket (1) includes an interface isolation block (14) embedded deep in the guide space (11), and the interface isolation block (14) has a blind hole-shaped contact port that matches the spatial arrangement of the needle-shaped contacts; The axial extension stroke of the terminal support base (25) matches the relative sliding stroke of the external thrust cylinder (211) so as to drive multiple needle-shaped contacts to simultaneously axially insert into the corresponding blind hole-shaped contact opening to establish a signal connection.

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