A J30JH low frequency connector plug-in and pull-out tool without tail cover

Abstract

The application relates to the field of electric connector tools, and discloses a J30JH type plug plugging tool which comprises upper clamping jaws, lower clamping jaws and guide screws, the guide screws are sleeved with supporting springs so that the two clamping jaws are normally opened, the inside of the clamping jaws is provided with an anti-falling mechanism which is composed of a sliding rod, a reset spring and an abutting block, the reset spring drives the abutting block to axially tightly abut against the end face of the plug to prevent the plug from slipping off in the moment of being pulled out, the tail part of the sliding rod is provided with a pull plate and a force applying ring, the clamping jaw body is correspondingly provided with a giving-way groove for the pull plate to store force backward, the front end of each clamping jaw is provided with a circular arc groove, a high-rigidity cushioning block which is matched with the contour of the plug is fixed in the groove, and the inner side of the cushioning block is covered with a flexible cushioning layer with anti-skid protrusions. The application can realize uniform force and lossless clamping of the tail cover-free plug in a small space, and can provide stable axial anti-falling pre-tightening, so that the stability and operation convenience of plugging operation are improved.

Description

Technical Field

[0001] This application relates to the field of electrical connector tools, specifically a J30JH type low-frequency electrical connector insertion and removal tool without a tail cover. Background Technology

[0002] As electronic devices develop towards higher integration, low-frequency electrical connectors such as the J30JH type are widely used in densely arranged electrical interface systems. In order to save installation space to the greatest extent, connectors in such working conditions usually adopt a tailless design. When removing tailless J30JH type plugs in a narrow and confined space, the existing operating methods face obvious technical bottlenecks. Due to the extremely small gap between adjacent connectors inside the equipment, operators can usually only use traditional general-purpose tools such as ordinary needle-nose pliers for clamping. The jaws of these rigid metal tools are usually flat or have hard teeth, which cannot form an effective conformal contact with the cylindrical plug shell. When clamping force is applied, obvious stress concentration will occur at the contact point, which can easily scratch the outer surface of the pure copper plug. In severe cases, it can cause the thin-walled plug shell to be dented under pressure, thereby damaging the internal insulating base and pin structure.

[0003] Meanwhile, the lack of a tail cover on the plug itself means it lacks a gripping point for structural restraint. The axial resistance to pull it out disappears abruptly the moment the plug is removed from the socket. This sudden change in resistance causes the tool's grip on the plug to become unstable, making it easy for the plug to slip out of the jaws and fall deep into the equipment housing. This not only increases the workload for subsequent maintenance and retrieval, but the lost metal plug can also cause safety hazards such as short circuits in the equipment system.

[0004] Therefore, this application proposes a tailless J30JH type low-frequency electrical connector insertion and removal tool to address the shortcomings of the prior art. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a tool for inserting and removing a J30JH type low-frequency electrical connector without a tail cover. This tool solves the problems of the plug easily slipping and falling off when removing the J30JH type low-frequency electrical connector without a tail cover in a confined space, and the problem of traditional rigid metal clamping tools easily scratching the outer surface of the plug.

[0006] To achieve the above objectives, this application provides the following technical solution: A tailless J30JH type low-frequency electrical connector plugging and unplugging tool is disclosed for plugging and unplugging J30JH type plugs. It includes an upper jaw, a lower jaw, and a guide screw, with a support spring fitted on the guide screw. An anti-dislodgement mechanism includes a mounting base, a sliding rod, a contact block, and a return spring. The mounting base is fixed to the inner middle of the upper and lower jaws, respectively. A guide hole is provided on the mounting base, through which the sliding rod passes. The contact block is fixed to the front end of the sliding rod, and the return spring is fitted on the sliding rod to provide elastic force to push the contact block against the J30JH type plug. An arc groove is provided at the front end of the upper and lower jaws, and an adsorption block is fixed within the arc groove. A flexible pad is fixed to the inner surface of the adsorption block.

[0007] Preferably, both the upper jaw and the lower jaw have mounting through holes on their tail ends, the guide screw passes through the mounting through holes, and the bottom of the guide screw is threadedly connected to the fastening nut.

[0008] Preferably, the support spring is located between the upper jaw and the lower jaw, and both ends of the support spring abut against the inner sides of the upper jaw and the lower jaw, respectively.

[0009] Preferably, the surface of the sliding rod is provided with a guide groove, and a guide protrusion is fixedly connected in the guide hole. The guide protrusion is embedded in the guide groove and slides with it.

[0010] Preferably, a pull plate is fixedly connected to the tail end of the sliding rod, the cross-sectional dimension of the pull plate is larger than the cross-sectional dimension of the sliding rod, and force-applying rings are fixedly connected to both ends of the pull plate. The upper and lower claws are provided with clearance grooves corresponding to the rear of the pull plate.

[0011] Preferably, the return spring is located between the mounting base and the abutment block, and both ends of the return spring abut against the mounting base and the abutment block, respectively.

[0012] Preferably, a positioning groove is provided on the front-facing surface of the abutment block, and the inner contour of the positioning groove is adapted to the end protrusion structure of the J30JH type plug.

[0013] Preferably, the surface of the flexible pad has a plurality of anti-slip protrusions, which abut against the outer surface of the J30JH type plug.

[0014] Preferably, the adsorption block is an arc-shaped block, and the outer arc surface of the adsorption block is fixed to the inner wall surface of the arc groove.

[0015] Preferably, the thickness of the front ends of the upper and lower jaws is less than the distance between the J30JH type plug and the mating socket, and the inner contour of the arc groove is adapted to the shape of both ends of the J30JH type plug.

[0016] Compared with the prior art, the above-described solution of this application embodiment has at least one of the following beneficial effects: 1. Improved stability during plug removal: This application incorporates an anti-drop mechanism consisting of a mounting base, a sliding rod, a contact block, and a return spring on the inner side of the upper and lower jaws. When the jaws close to remove the plug, the operator releases the sliding rod, and the axial thrust of the return spring drives the contact block to tightly adhere to and press against the plug end face, thus establishing a stable pre-tightening limit state in the removal direction. This structure effectively overcomes the problem of plug slippage or drop caused by the sudden decrease in force upon removal from the socket when unplugging a plug without a tail cover in a confined space.

[0017] 2. It achieves non-destructive force-equal clamping of the plug shell. The tool has a padding block and a flexible pad with anti-slip protrusions fixed in the arc groove at the front end of the upper and lower jaws. The arc structure of the padding block precisely matches the curved surface of the plug shell, transforming the rigid point-line contact of traditional tools into surface contact, so that the clamping stress is evenly distributed to the plug shell. Combined with the elastic deformation of the flexible padding and the locking friction provided by the anti-slip protrusions, it not only ensures the structural anti-slip capability during clamping and pulling, but also avoids scratches or pressure dents on the surface of the pure copper shell caused by direct contact between the metal jaws.

[0018] 3. The tool optimizes operational convenience and structural avoidance in confined spaces. The thickness of the front claw is designed with dimensional constraints to allow it to penetrate into the narrow gaps of densely arranged electrical interfaces without interference. The pull plate and force ring at the end of the sliding rod provide reliable hooking points for the operator's fingers. In conjunction with the specially designed clearance groove on the claw body, it provides the necessary movement space for the pull plate to store force backward. Combined with the design of the support spring to keep the claw open in a normal state, the operator can smoothly complete the combined action of storing force in the anti-disengagement mechanism and clamping at the front end with one hand, improving work efficiency in complex working conditions. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings: Figure 1 This is a perspective view of the plug-in / plug-out tool shown in an embodiment of this application; Figure 2This is a perspective view of the bottom surface of the insertion / removal tool shown in the embodiments of this application; Figure 3 This is a perspective view of the upper jaw of the insertion / removal tool shown in an embodiment of this application; Figure 4 This is a perspective view of the lower jaw of the insertion / removal tool shown in an embodiment of this application; Figure 5 This is a perspective view of the anti-detachment mechanism of the plug-in / plug-out tool shown in an embodiment of this application. Figure 6 This is a perspective view of the sliding rod of the insertion / removal tool shown in an embodiment of this application; Figure 7 This is a perspective view of the mounting base shown in an embodiment of this application; Figure 8 For this application Figure 3 Enlarged view of point A in the middle; Figure 9 This is a schematic diagram of the guide screw of the insertion and removal tool shown in an embodiment of this application.

[0020] Among them, 1. Upper jaw; 101. Lower jaw; 2. Guide screw; 3. Support spring; 4. J30JH type plug; 5. Fastening nut; 6. Mounting through hole; 7. Mounting base; 701. Sliding rod; 702. Pull plate; 703. Abutment block; 704. Positioning groove; 705. Return spring; 706. Guide slide groove; 707. Guide through hole; 708. Guide protrusion; 709. Force ring; 710. Relief groove; 8. Pad liner; 801. Flexible pad; 802. Anti-slip protrusion. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the article or device that includes said element.

[0023] The optional embodiments of this application are described in detail below with reference to the accompanying drawings.

[0024] Please see Figures 1-9 This embodiment provides a tailless J30JH type low-frequency electrical connector plugging and unplugging tool, including: upper jaw 1 and lower jaw 101. The upper jaw 1 and lower jaw 101 are arranged in a mirror symmetrical manner, forming the core clamping main structure of this tool, and providing a basic mounting carrier and mechanical transmission medium for other functional components. Both upper jaw 1 and lower jaw 101 adopt a mechanical configuration design based on a cantilever beam model. Their materials are usually selected from aerospace-grade aluminum alloys (such as 7075-T6 aluminum alloy) or special stainless steels (such as precipitation hardening type 17-4PH stainless steel) with high yield strength and lightweight characteristics. They are formed by CNC machining and combined with surface hard anodizing or sandblasting passivation treatment to improve the overall bending section modulus and eliminate surface stress concentration, ensuring that no plastic yielding or fatigue fracture occurs under high-frequency alternating force environment.

[0025] Reference Figure 1 , Figure 2 , Figure 9 The guide screw 2 passes through and connects the tail ends of the upper jaw 1 and the lower jaw 101 in a vertical direction, and plays a role in guiding the action of the series gripper structure and limiting the opening and closing trajectory. The surface of the guide screw 2 is ground with high precision by a centerless grinder and has extremely low surface roughness (e.g. Ra0.4 level) to reduce the dry friction coefficient during relative sliding.

[0026] Reference Figure 1 , Figure 2 The J30JH type plug 4 is the target object of this tool. Its end lacks a conventional gripping tail cover, resulting in extremely limited external clamping force points. It needs to be gripped by the tool with a specific shape and surface adaptive gripping.

[0027] Reference Figure 1 , Figure 2 , Figure 9 A support spring 3 is sleeved on the guide screw 2. The axis of the support spring 3 coincides with the axis of the guide screw 2. When it is in a natural or slightly compressed state, the axial expansion force generated by it continuously acts between the inner sides of the upper jaw 1 and the lower jaw 101, so that the front ends of the two jaws automatically maintain the initial open state when the tail is not pressed or squeezed, thereby reserving a sufficient clamping distance to allow the J30JH type plug 4 to be inserted.

[0028] Reference Figure 9The support spring 3 is made of spring steel wire with high fatigue limit (such as 65Mn or piano wire), and its two ends are flattened by grinding to ensure that when the linear expansion force is output, the end face contact stress acting on the inner side wall of the upper jaw 1 and the lower jaw 101 is evenly distributed, avoiding asynchronous skew angle of the tool front end clamping jaw due to local force eccentricity.

[0029] Reference Figures 1 to 6 The anti-drop mechanism is an independent working component of this tool, located inside the clamping body. It is used to axially limit and fix the target object in the removal direction and pre-tighten it before the clamping action is completed. It includes a mounting base 7, a sliding rod 701, an abutment block 703, and a return spring 705. These four core components together constitute a push-positioning assembly with elastic telescopic stroke.

[0030] Reference Figures 1 to 7 Mounting bases 7 are fixed to the inner sides of the middle of the upper jaw 1 and the lower jaw 101 respectively. The mounting bases 7 are rigidly fixed to the jaw body by fastening (such as high-strength countersunk screw connection, anti-shear pin riveting, or direct integrated milling with the jaw body) to serve as a stable force support base for the entire anti-drop mechanism.

[0031] Reference Figure 7 When bearing reverse thrust, the mounting base 7 has a specific rounded corner transition feature at its root joint, which is designed to minimize the stress concentration factor and prevent micro-cracks from forming under instantaneous high-load removal conditions. The mounting base 7 is provided with a guide hole 707. The diameter of the guide hole 707 is matched with the outer diameter of the sliding rod 701, and a specific hole-based clearance fit is adopted (such as H7 / g6 tolerance grade). While ensuring smooth sliding, it effectively limits the radial wobble clearance and prevents the sliding component from jamming during movement or the boundary friction effect caused by insufficient length-to-diameter ratio (i.e., anti-jamming design).

[0032] Reference Figure 5 , Figure 6 The sliding rod 701 passes through the guide hole 707, and the sliding rod 701 slides smoothly in the back and forth direction using the linear guide rail formed by the guide hole 707, ensuring that the central axis of the pushing action does not deviate angularly. The main body of the sliding rod 701 is made of heat-treated alloy steel, which has sufficient resistance to compressive instability critical load, preventing micro-bending deformation under long-term pressure from the return spring 705.

[0033] Reference Figure 5 , Figure 6The abutment block 703 is fixed to the front end of the sliding rod 701. The end face of the abutment block 703 serves as the direct contact end. Its movement trajectory is absolutely parallel and collinear with the axial pull-out direction of the J30JH type plug 4. The connection between the abutment block 703 and the sliding rod 701 can be secured by threads and supplemented with anaerobic thread retainer to ensure that the connection node does not loosen under high-frequency impact vibration.

[0034] Reference Figure 3 , Figure 5 , Figure 6 The return spring 705 is sleeved on the sliding rod 701 to provide the elastic force to push the abutment block 703 against the J30JH type plug 4. The return spring 705 is compressed and stored in force when the sliding rod 701 is pulled backward. According to Hooke's law, the energy-stored return force generated is directly proportional to its compression displacement. After the jaws are aligned with the J30JH type plug 4 and the sliding rod 701 is released, the released axial thrust drives the abutment block 703 to push forward, so that the abutment block 703 fits tightly against the end face of the J30JH type plug 4. Thus, a stable anti-dislodgement pre-limiting state is established before the force is applied during the pull-out operation. The preset elastic force is calculated within the physical threshold range that can overcome the sliding static friction of the anti-dislodgement mechanism itself, and will not damage the fragile pin header and insulating base at the front end of the J30JH type plug 4 due to excessive thrust.

[0035] Reference Figure 1 , Figure 2 , Figure 4 , Figure 8 The front ends of the upper claw 1 and the lower claw 101 are provided with arc grooves. The opening direction of the arc grooves is relatively inward. The radius of curvature and the depth of concavity are reverse-mapped and precisely CNC machined according to the external contour dimensions of both ends of the J30JH type plug 4 to increase the clamping area of ​​the package, transform point-line contact into surface contact, thereby reducing the contact pressure per unit area.

[0036] Reference Figure 4 , Figure 8A padding block 8 is fixed inside the arc groove. The outer arc surface of the padding block 8 is fitted and fixed to the inner wall of the arc groove. As a transitional support component connecting the rigid claw body and the flexible padding, it utilizes its own mechanical transmission characteristics to achieve smooth distribution and homogenization of stress during clamping. Considering the special operating environment of aerospace or military equipment, the padding block 8 is preferably made of polyetheretherketone (PEEK) special engineering plastic with extremely high mechanical compressive strength and thermal stability, rather than ordinary nylon (PA) or polyoxymethylene (POM) material, to ensure that irreversible dimensional shrinkage or stress creep will not occur in the complex service environment with drastic temperature fluctuations. At the same time, its arc-shaped structure design based on three-dimensional reverse mapping can effectively fill the space inside the claw, constructing a stepped support base with extremely high structural rigidity, ensuring that the curvature of the clamping surface and the shape of the copper J30JH type plug 4 achieve a tight conformal fit, fundamentally eliminating the risk of extrusion deformation of the J30JH type plug 4 shell caused by uneven local stress or gap collapse.

[0037] Reference Figure 8 A flexible pad 801 is fixed to the inner surface of the pad block 8, completely covering the inner contact surface of the pad block 8. When clamping force is applied, the flexible pad 801 undergoes elastic deformation and tightly wraps around the outer surface of the J30JH type plug 4, increasing surface contact friction while isolating the direct rigid compression between the metal substrate at the tool tip and the housing of the J30JH type plug 4. The flexible pad 801 is made of conductive rubber or fluororubber with a specific Shore A hardness (such as Shore A 50-70), which not only has excellent tear resistance and chemical solvent corrosion resistance, but also enables rapid discharge of static charge through a conductive network, meeting the anti-static (ESD) process specifications in the assembly of electronic components, and ensuring that the surface of the 30JH type plug 4 is not subject to any physical scratches or electrostatic breakdown risks.

[0038] Reference Figures 1 to 4 The upper jaw 1 and the lower jaw 101 are both provided with mounting through holes 6 on their tail end surfaces. The axis of the mounting through holes 6 is perpendicular to the length direction of the upper jaw 1 and the lower jaw 101, providing a standard assembly channel for the subsequent connection of components. To ensure assembly accuracy, the inside of the mounting through holes 6 is reamed to eliminate micro burrs generated by drilling.

[0039] Reference Figure 1 , Figure 2 , Figure 9The guide screw 2 passes through the mounting through hole 6, and the smooth shank of the guide screw 2 forms a clearance fit with the inner wall of the mounting through hole 6, so that the upper jaw 1 and the lower jaw 101 can maintain a smooth and unobstructed movement trajectory when moving relative to each other along the axial direction of the guide screw 2. In this kinematic model, in addition to bearing the radial shear stress caused by the front clamping reaction force, the guide screw 2 also acts as a directional key to limit the relative lateral torsion of the two jaws.

[0040] Reference Figure 9 The bottom of the guide screw 2 is threadedly connected to the fastening nut 5, which locks onto the threaded end of the guide screw 2. This mechanically limits the maximum opening distance of the upper jaw 1 and the lower jaw 101, preventing structural disintegration of the tool due to elastic force during operation or idle periods. Furthermore, the fastening nut 5 employs a nylon self-locking nut or a design with a high-strength spring washer to prevent loosening, effectively resisting micro-vibration loosening of the threaded pair caused by long-term operation and ensuring the long-term stability of the maximum opening and closing stroke threshold.

[0041] Reference Figures 1 to 2 , Figure 9 The support spring 3 is located between the upper jaw 1 and the lower jaw 101. The central axis of the support spring 3 is coaxially arranged with the rod of the guide screw 2. The rod of the guide screw 2 serves as an internal rigid guide shaft to prevent the support spring 3 from experiencing macroscopic lateral bending instability and elastic failure under compression deformation. Both ends of the support spring 3 abut against the inner sides of the upper jaw 1 and the lower jaw 101, respectively. In this abutment area, the inner sides of the upper jaw 1 and the lower jaw 101 are usually machined with corresponding circular positioning shallow grooves or countersunk holes to accommodate the end coils of the support spring 3, thereby radially locking the spring's positional freedom. Under normal conditions, the support spring 3 is in a pre-compressed state. The continuous reverse thrust output from its two ends forces the tail ends of the upper jaw 1 and the lower jaw 101 to expand outward, thereby keeping the front working parts of the two jaws open through the principle of geometric levers. By setting precise mechanical parameters for the fulcrum, power arm, and resistance arm, operators can easily overcome the preset elastic force by pressing the tail with one hand, accurately control the closing action of the front gripper, optimize ergonomic indicators, and reduce the rate of fatigue accumulation of hand muscle groups during continuous assembly operations.

[0042] Reference Figure 5 , Figure 6 The sliding rod 701 has a guide groove 706 on its surface. The guide groove 706 extends straight along the axial length of the sliding rod 701. The bottom and sidewalls of the groove are smoothed and possibly coated with a solid lubricant (such as molybdenum disulfide or polytetrafluoroethylene Teflon coating) to reduce the sliding friction resistance during long-distance relative linear motion.

[0043] Reference Figure 7A guide protrusion 708 is fixedly connected within the guide perforation 707. The guide protrusion 708 protrudes from the inner wall of the guide perforation 707, and its geometry and dimensions correspond to the cross-sectional profile of the guide groove 706. The guide protrusion 708 is typically made of high-hardness, low-friction engineering plastic (such as polyoxymethylene POM or polyetheretherketone PEEK) inserts, or is integrally formed on the metal mounting base 7 substrate by slow wire cutting process. The guide protrusion 708 is embedded in the guide groove 706 and slides with it. Through this keyway-type mechanical surface fit, the circumferential rotational freedom of the sliding rod 701 within the mounting base 7 around its own geometric central axis is locked.

[0044] Reference Figures 5 to 7 This structural design ensures that the abutment component fixed to the front end of the sliding rod (due to its specific orientation positioning profile) can always maintain a unique and correct alignment angle, avoiding relative deflection when blindly operating in complex and narrow spaces where visibility is limited or obstructed, which could lead to misalignment, squeezing, or pre-positioning failure.

[0045] Reference Figure 2 , Figure 3 , Figure 5 , Figure 6 The sliding rod 701 is fixedly connected to a pull plate 702 at its tail end. The pull plate 702 serves as the human-machine interface input for the anti-drop mechanism, providing ample contact surface for the operator's fingers. Its outer surface is typically machined with diamond-shaped knurled or straight-knitted grooves to increase the frictional gripping force on the fingertip surface, facilitating the application of a continuous pulling force to overcome the linear elastic force of the spring.

[0046] Reference Figure 5 , Figure 6 The cross-sectional dimension of the pull plate 702 is larger than that of the sliding rod 701. This abrupt change in size design naturally forms an anti-slip barrier in the structural topology. This feature not only effectively reduces the probability of slippage when the operator is wearing heavy anti-static gloves or pressurized gloves in a spacesuit, but also ensures that when the sliding rod 701 moves forward to its limit stroke position under the drive of the return spring 705, its front step surface forms a direct interference collision limit with the tail reference surface of the mounting base 7, preventing the sliding rod 701 from excessively rushing forward and causing the front end component to fall out of the effective guide area of ​​the mounting base 7.

[0047] Reference Figure 2 , Figure 3 , Figure 5 , Figure 6 Both ends of the pull plate 702 are fixedly connected with force rings 709. The force rings 709 are in the shape of an inwardly bent arc or a finger ring, which are specially designed to provide an ergonomic hooking force point for the operator's fingers. They can apply a stable backward pulling force and effectively prevent the fingers from slipping.

[0048] Reference Figures 1 to 4 The upper jaw 1 and the lower jaw 101 are provided with clearance grooves 710 behind the pull plate 702. The clearance grooves 710 are recessed into the jaw body. When the operator pulls the pull plate 702 backward through the force ring 709 to compress the return spring 705 to store force, the clearance grooves 710 provide the necessary clearance space for the backward movement of the pull plate 702 and the force ring 709, preventing mechanical interference with the inclined structure of the jaw, and ensuring that the anti-drop mechanism can smoothly reach the maximum clearance and force storage stroke required by the design.

[0049] Reference Figure 3 , Figure 5 , Figure 6 The return spring 705 is located between the mounting base 7 and the abutment block 703. The return spring 705 is sleeved in the outer radial space of the sliding rod 701, forming a compact coaxial nested structure layout, and using the front end face of the mounting base 7 as a fixed reverse force support reference.

[0050] Reference Figure 3 , Figure 5 , Figure 6 The two ends of the return spring 705 abut against the mounting base 7 and the abutment block 703, respectively. When the operation command triggers the sliding rod 701 to pull backward, the abutment block 703 moves backward with equal displacement, forcing the pitch of the return spring 705 to shrink, causing it to undergo axial elastic compression deformation and thus storing elastic potential energy in its internal lattice. Since the helical coil of the return spring 705 is always supported by the radial limit of the outer diameter surface of the inner sliding rod 701, it will not undergo "snake-like" buckling deformation even when the ultimate compression ratio is reached. Once the operator releases the pull plate to release the tension limit on the sliding rod 701, the return spring 705 responds instantaneously and quickly releases its potential energy and extends outward, transmitting the dynamic restoring force to the abutment block 703, which powerfully, quickly, and smoothly pushes the abutment block 703 forward to the set effective working contact position.

[0051] Reference Figure 6 A positioning groove 704 is provided on the front-facing surface of the abutment block 703. The positioning groove 704 is recessed into the body of the abutment block 703 to form a receiving space with a specific depth and three-dimensional geometry. The inner contour edge of the space is chamfered or rounded to provide a guide slope for guiding the sliding in, which is specifically used for non-destructive docking of the tail end feature of the target J30JH type plug 4. The inner contour of the positioning groove 704 is adapted to the end protrusion structure of the J30JH type plug 4, that is, in the three-dimensional coordinate system, the mating surfaces of the two achieve conjugate fit within the tolerance range.

[0052] Under the continuous thrust of the return spring 705, the positioning groove 704 can precisely fit around the outer periphery of the end protrusion of the J30JH type plug 4, forming physical interference at the physical contact boundary. This precise form-surface fit not only achieves reliable axial clamping and limiting on the Z-axis (removal direction), but also restricts the slight offset and vibration of the J30JH type plug 4 body in any direction within the radial plane formed by the X and Y axes, completely constraining the six spatial degrees of freedom. This ensures the absolute stability of the pre-tightened positioning state of the J30JH type plug 4 when a maximum removal force is applied subsequently, eliminating the potential risk of tool rebound due to slippage.

[0053] Reference Figure 8 The surface of the flexible pad 801 is covered with several anti-slip protrusions 802, which are arranged in an array of tiny particles or in a continuous, interlaced ribbed structure. By changing the microscopic surface topology, the apparent macroscopic roughness and effective gripping area of ​​the working contact surface of the flexible pad 801 are increased.

[0054] The anti-slip protrusion 802 abuts against the outer surface of the J30JH type plug 4. Under the condition that the upper claw 1 and the lower claw 101 are subjected to force at their tails and the front end is subjected to a closing clamping force according to the leverage ratio, the rubber molecular chains at the pressure point of the anti-slip protrusion 802 undergo localized micro-elastic deformation.

[0055] Based on Hertzian contact theory, the micro-deformation of the protruding part allows it to tightly engage with the smooth outer shell surface of the J30JH plug 4, which may have a small amount of assembly oil film. The locking mechanism improves the static friction coefficient and anti-slip resistance between the tool contact surface and the metal J30JH plug 4, effectively resisting the strong relative sliding and detachment tendency generated by Newton's first law when the J30JH plug 4 is disengaged from the mating socket and the force decreases suddenly. This greatly enhances the system reliability of the overall clamping envelope of the tool tip.

[0056] Reference Figure 4 , Figure 8 The padding block 8 is an arc-shaped block, and its material is a lightweight alloy or engineering plastic material with high compressive strength. The arc design is designed to perfectly fit the curved surface of the shell of the column connector, so that its inner surface can be as close as possible to and envelop the end shell of the J30JH type plug 4 with the same arc feature, so that the clamping force applied later can be distributed more evenly.

[0057] The outer arc surface of the padding block 8 is fixed to the inner wall of the arc groove. Instead of using ordinary glue that is prone to aging, the two are bonded together by high-strength structural epoxy resin or by a pure mechanical inlay pressing process based on the dovetail groove structure. This assembly method ensures that the padding block 8 will not peel off, fall off or shift in size when subjected to frequent magnetic adsorption tension, alternating temperature thermal stress or high-intensity working friction shear force. Thus, it provides a stable and unbiased solid base for clamping the J30JH plug 4 throughout the tool's entire life cycle.

[0058] Reference Figures 1 to 2 , Figure 4 The thickness of the front ends of the upper jaw 1 and the lower jaw 101 is less than the distance between the J30JH type plug 4 and the mating socket. This dimensional constraint feature, which is based on rigorous reverse calculations of the actual installation environment, is the key physical premise and core barrier for the tool to be applicable to operations in extremely confined spaces. It ensures that when the aerospace electrical connector is in a state of multiple dense parallel wiring and tight mating, the metal jaw structure at the front end of the tool will not be blocked by its bulky size. It can directly probe through the side slit and pass through the extremely limited reserved operating gap (usually the gap tolerance is very small, at the level of a few millimeters) without any irreversible rigid structural collisions and interference damage with the surrounding printed circuit board components, fastening bolts, cable bundles or socket substrates.

[0059] Furthermore, the inner contour of the arc groove is adapted to the shape of both ends of the J30JH plug 4. This high-fitting envelope design based on equipotential surfaces maximizes the effective geometric contact area between the claws and the shell of the J30JH plug 4 in the closed dead point state, transforming the applied concentrated load into a uniformly distributed load, so that the clamping stress is evenly distributed to the robust skeleton structure of the J30JH plug 4 shell.

[0060] This mechanical dispersion effect avoids the localized stress concentration that occurs when gripping with traditional needle-nose flat-jaw pliers, eliminating the risk of pressure indentation, plastic deformation, or damage to the internal insulation of the J30JH type plug's thin-walled metal shell. Thus, it enables truly non-destructive, safe, and efficient removal operations for high-precision and high-value tailless electrical interfaces in harsh and confined spaces.

[0061] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the systems or apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to the method section.

[0062] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A J30JH low frequency electrical connector plug unplug tool without tail cover, characterized in that, include: Upper jaw (1) and lower jaw (101), guide screw (2), J30JH type plug (4), and a support spring (3) is sleeved on the guide screw (2); The anti-detachment mechanism includes a mounting base (7), a sliding rod (701), an abutment block (703), and a return spring (705). The mounting base (7) is fixed to the inner side of the middle part of the upper claw (1) and the lower claw (101). A guide hole (707) is provided on the mounting base (7). The sliding rod (701) passes through the guide hole (707). The abutment block (703) is fixed to the front end of the sliding rod (701). The return spring (705) is sleeved on the sliding rod (701) to provide the elastic force to push the abutment block (703) against the J30JH type plug (4). The front ends of the upper jaw (1) and the lower jaw (101) are provided with arc grooves, and a padding block (8) is fixed in the arc groove. A flexible padding layer (801) is fixed on the inner surface of the padding block (8).

2. A J30JH low frequency electrical connector plug unplug tool according to claim 1, characterized in that: The upper jaw (1) and the lower jaw (101) are both provided with mounting through holes (6) on their tail ends. The guide screw (2) passes through the mounting through hole (6) and the bottom of the guide screw (2) is threadedly connected to the fastening nut (5).

3. A J30JH low frequency electrical connector plug unplug tool according to claim 1, characterized in that: The support spring (3) is located between the upper jaw (1) and the lower jaw (101), and the two ends of the support spring (3) abut against the inner sides of the upper jaw (1) and the lower jaw (101), respectively.

4. A J30JH low frequency electrical connector plug unplug tool according to claim 1, characterized in that: The sliding rod (701) has a guide groove (706) on its surface, and a guide protrusion (708) is fixedly connected in the guide hole (707). The guide protrusion (708) is embedded in the guide groove (706) and slides with it.

5. A J30JH low frequency electrical connector plug unplug tool according to claim 1, characterized in that: The tail end of the sliding rod (701) is fixedly connected to a pull plate (702), and the cross-sectional dimension of the pull plate (702) is larger than that of the sliding rod (701). Both ends of the pull plate (702) are fixedly connected to force rings (709), and the upper claw (1) and the lower claw (101) are provided with clearance grooves (710) corresponding to the rear of the pull plate (702).

6. A J30JH low frequency electrical connector plug unplug tool according to claim 1, characterized in that: The return spring (705) is located between the mounting base (7) and the abutment block (703), and the two ends of the return spring (705) abut against the mounting base (7) and the abutment block (703) respectively.

7. A J30JH low frequency electrical connector plug unplug tool according to claim 1, wherein: The abutment block (703) has a positioning groove (704) on its front-facing surface, and the inner contour of the positioning groove (704) is adapted to the end protrusion structure of the J30JH type plug (4).

8. The J30JH type low-frequency electrical connector plugging and unplugging tool without a tail cover according to claim 1, characterized in that: The surface of the flexible pad (801) is provided with a number of anti-slip protrusions (802), which abut against the outer surface of the J30JH type plug (4).

9. A J30JH low frequency electrical connector plug unplug tool according to claim 1, wherein: The padding block (8) is an arc-shaped block, and the outer arc surface of the padding block (8) is fixed to the inner wall surface of the arc groove.

10. A J30JH low frequency electrical connector plug unplug tool according to claim 1, characterized in that: The thickness of the front end of the upper claw (1) and the lower claw (101) is less than the distance between the J30JH type plug (4) and the mating socket, and the inner contour of the arc groove is adapted to the shape of both ends of the J30JH type plug (4).

Images