A power connection terminal with mistaken insertion prevention and quick locking function

Abstract

The utility model provides a kind of power connection terminal with anti-misplug and quick locking function, including insulating shell, the electrically conductive terminal embedded in several insulating shell, it is characterized by: the front end of the insulating shell is equipped with asymmetric anti-misplug component, asymmetric anti-misplug component includes left side rectangle protruding, right side trapezoidal groove and middle part guide inclined rib, rectangle protruding height is 8-10mm, trapezoidal groove depth is 5-7mm, guide inclined rib and horizontal plane included angle is 30 °;The top of the insulating shell is equipped with quick locking mechanism, and the mechanism is composed of transversely penetrating locking rod, reset spring and symmetrical distribution elastic buckle of being sleeved on the outside of locking rod, locking rod both ends extend to the outside of insulating shell and form operating part, and the lower end of elastic buckle is adapted with the clamping groove of the top of electrically conductive terminal;The rear end of the electrically conductive terminal is equipped with line diameter adaptation hole, and 3-4 barb protruding teeth are arranged on the inner wall of hole, and the both sides of electrically conductive terminal are equipped with positioning wing plate symmetrically, and positioning wing plate cooperates with the limiting slot of insulating shell inside.

Description

Technical Field

[0001] This utility model belongs to the field of power wiring, and specifically relates to a power terminal block with anti-misinsertion and quick locking functions. Background Technology

[0002] Currently, power terminals widely used in industrial equipment and electrical systems generally suffer from three major technical pain points: First, anti-misinsertion designs mostly rely on simple physical limits or symmetrical structures. When the terminals have similar outlines, misinsertion can still occur due to operator visual errors or forceful insertion, leading to significant safety hazards such as reversed polarity or phase sequence confusion. This is especially pronounced in high-density layouts where the guiding tolerance and identification of existing anti-misinsertion structures are insufficient. Second, traditional locking mechanisms often use screw pressing or knob-type structures, requiring... Using tools for multi-turn rotation not only significantly reduces wiring efficiency but also makes the wires prone to spontaneous loosening in vibrating environments. Furthermore, some quick-connect structures suffer from fluctuating contact resistance due to uncontrollable locking force, making it difficult to balance ease of operation with reliable electrical connections. Thirdly, wire crimping often employs planar clamping or single-point piercing designs, resulting in poor adaptability to different wire diameters. Thin wires are prone to stress concentration and metal fatigue fracture, while thicker wires suffer from insufficient contact area and localized overheating. Moreover, existing toothed structures are susceptible to plastic deformation and loss of holding force under axial tension. More importantly, these defects often compound each other—for example, forced insertion after anti-misinsertion failure can damage the locking mechanism's linkage components, while unreliable wire crimping leading to temperature rise accelerates the aging and deformation of the insulation shell, further weakening the anti-misinsertion function. Although some commercial terminals have attempted improvements by adding auxiliary positioning pins or double-layer locking structures, these have resulted in bulky size, soaring costs, and the complex mechanical structure actually reduces fault tolerance in harsh environments. Therefore, there is an urgent need for a power terminal solution that integrates physical topology optimization to prevent mis-mating, tool-less quick locking, and adaptive crimping across the entire wire diameter range, ensuring millisecond-level insertion and removal efficiency while achieving intrinsic safety, error prevention, and maintenance-free reliability for tens of thousands of cycles. Thus, there is a pressing need for a power terminal block with mis-mating prevention and quick locking functions. Utility Model Content

[0003] This utility model proposes a power terminal block with anti-misinsertion and quick-locking functions. It provides a power terminal block with integrated asymmetric anti-misinsertion structure, tool-free quick-locking and full-range wire diameter adaptive crimping, which solves the technical defects of traditional terminals such as high risk of misinsertion, cumbersome locking operation and poor wire crimping reliability, and realizes precise guidance of electrical connection, second-level locking and long-term maintenance-free operation.

[0004] The technical solution of this utility model is implemented as follows: A power terminal block with anti-misinsertion and quick-locking functions includes an insulating shell and a plurality of conductive terminals embedded in the insulating shell. The insulating shell has an asymmetric anti-misinsertion component on its front end face, comprising a rectangular protrusion on the left, a trapezoidal groove on the right, and a guide rib in the middle. The rectangular protrusion has a height of 8-10mm, the trapezoidal groove has a depth of 5-7mm, and the guide rib forms a 30° angle with the horizontal plane. The top of the insulating shell has a quick-locking mechanism, consisting of a horizontally penetrating locking rod, a return spring sleeved on the outside of the locking rod, and symmetrically distributed elastic buckles. Both ends of the locking rod extend to the outside of the insulating shell to form operating parts, and the lower end of the elastic buckle is adapted to the slot on the top of the conductive terminal. The rear end of the conductive terminal has a wire diameter adaptation hole, the inner wall of which is circumferentially decorated with 3-4 barbed protrusions. The conductive terminal also has symmetrically arranged positioning wing plates on both sides, which cooperate with the limiting groove on the inner side of the insulating shell.

[0005] Existing power terminal blocks suffer from three major technical bottlenecks: First, anti-misinsertion designs often rely on symmetrical outlines or simple markings, which can easily lead to misinsertion due to visual deviations or misaligned insertion angles in dimly lit environments or high-density installations. Forced misinsertion can damage the physical structure of the terminal or even cause a short circuit. Existing guide structures lack progressive correction capabilities and geometric asymmetry constraints. Second, traditional screw crimping requires tools and involves many turns, resulting in low operational efficiency. Quick-connect locking mechanisms generally suffer from uncontrollable locking force and are prone to loosening due to vibration. The core challenge lies in how to achieve a linear conversion between the pressing stroke and the locking force through a simplified mechanical structure, while avoiding fatigue failure of elastic elements. Third, the wire crimping part uses a single aperture or flat clamp, which cannot accommodate the stress distribution requirements of wires with different diameters. When crimping thin wires, the stress concentration of the countertooth can easily cut the core wire, while thick wires suffer from fretting wear due to insufficient contact area. Furthermore, the countertooth can easily lose its biting force under repeated thermal expansion and contraction. More importantly, the aforementioned problems pose a risk of coupled deterioration—for example, misinsertion impacts can cause deformation of the locking mechanism's linkage components, while unreliable crimping can accelerate the creep of the insulating shell, further weakening the fitting accuracy of the anti-misinsertion structure. This solution constructs a physical anti-misinsertion barrier through the geometrically complementary topology of the asymmetric anti-misinsertion component (rectangular protrusions + trapezoidal grooves + 30° guide ribs), utilizes the lever-type force-increasing mechanism of the locking rod-elastic buckle to achieve a 12N locking force triggered by a 3mm short stroke, and optimizes the conductor stress distribution through the radial adaptive engagement of stepped holes + annular barbed teeth. Ultimately, this solution overcomes the industry pain point of the difficulty in coordinating anti-misinsertion tolerance, locking operation efficiency, and crimping reliability.

[0006] In this application, the rectangular protrusion on the left guides the initial mating through a top arc-shaped chamfer, and its integrally formed anti-detachment flange on the outer wall and the L-shaped notch of the mating terminal form a geometrical mutual exclusion. When the insertion angle deviates, the anti-detachment flange forms a three-dimensional spatial interference, generating a correction resistance significantly higher than that of conventional structures, mechanically preventing the possibility of forced mis-insertion. The elastic anti-slip rib on the inner wall of the trapezoidal groove on the right is molded from a polymer composite material, generating controllable elastic deformation during the dovetail insertion of the mating terminal, providing tactile positioning feedback through continuous frictional damping. The central guide rib decomposes the vertical insertion force into a horizontal correction force at a specific angle, and its back transition arc optimizes stress distribution, while the wear-resistant coating on the surface enables smooth insertion and extraction without grease lubrication. These three elements constitute a unique mating path with spatial complementarity, allowing the operator to complete tactile blind mating without visual assistance.

[0007] When the docking terminal is fully inserted, its top contour triggers the expansion of the elastic latches, and the return spring enters a stored state. The operator presses down on the locking lever with one hand, converting linear displacement into rotational torque through a precision-machined stepped structure in the middle of the lever, driving the symmetrically distributed elastic latches to retract synchronously around the hinge axis. The wedge-shaped latch at the lower end of the latches engages with the docking terminal slot at an optimized self-locking angle, with anti-retraction teeth on the inner side of the latch forming a wedge-shaped meshing fit with the V-shaped locking surface. This design enables a single pressing action to simultaneously achieve: ① efficient conversion of locking lever displacement into vertical locking force; ② self-locking angle structure resisting vibration-induced loosening; ③ continuous compensation of mechanical wear by the return spring. When unlocking, lifting the locking lever causes the wedge-shaped latches to automatically disengage, guided by the chamfer of the docking terminal, achieving non-destructive separation.

[0008] The stepped wire diameter adapter hole at the rear end of the conductive terminal features spirally distributed barbed protrusions with rounded ends, enabling progressive stress distribution during wire engagement. The combination of the inlet flared guide and cantilevered guide vane optimizes wire core arrangement during insertion, and dynamically adjusts contact pressure through elastic deformation after energization. The precise fit between the positioning wing plate and the limiting groove within the insulating housing forms a floating support structure that allows for slight displacement due to thermal expansion. The precise guidance of the anti-misinsertion component ensures that the locking mechanism is activated only in the fully inserted position, while the locking force is transmitted to the housing through the conductive terminal positioning wing plate, reinforcing the bending strength of the anti-misinsertion component. This closed-loop design, from insertion positioning and wire crimping to vibration protection, ensures the entire system maintains a stable electrical connection under harsh operating conditions.

[0009] In a preferred embodiment, the asymmetric anti-misinsertion assembly has an arc-shaped chamfer at the top of the left rectangular protrusion and an anti-disengagement flange integrally formed on its outer wall; the right trapezoidal groove has symmetrical elastic anti-slip ribs on its inner wall, which extend along the depth of the groove and are adapted to the anti-disengagement flange of the rectangular protrusion; the middle guide rib has a transition arc on the side away from the front end face, and the surface of the guide rib is covered with a wear-resistant coating.

[0010] In a preferred embodiment, the quick-locking mechanism has a locking rod made of high-strength alloy material, with an annular positioning groove on its outer wall and the end of the return spring embedded in the positioning groove; the upper end of the elastic buckle is hinged to the locking rod, and the lower end is provided with a wedge-shaped buckle head, with anti-retraction teeth adapted to the buckle groove on the inner side of the buckle head; the outer surface of the operating part is provided with knurled texture, and a rubber buffer pad is provided at the contact part with the insulating shell.

[0011] In a preferred embodiment, the wire diameter adapter hole of the conductive terminal is a stepped through hole, and the barbed protrusions on its inner wall are spirally distributed along the hole axis, with the ends of the protrusions having an arc-shaped structure; a horn-shaped guide opening is provided at the entrance of the wire diameter adapter hole, and a conductive guide plate is provided between the inner wall of the guide opening and the barbed protrusions, with the guide plate being integrally formed with the conductive terminal body.

[0012] After adopting the above technical solution, the beneficial effects of this utility model are as follows: In terms of safety and error prevention, the asymmetric anti-misinsertion component forms a unique insertion path through the geometric mutual exclusion of the rectangular protrusion and the trapezoidal groove. The 30° guide rib actively corrects the deviation of the mating terminals at the initial insertion stage, completely eliminating the possibility of forced misinsertion. Its physical topological difference is significantly better than the error prevention effectiveness of traditional color marks or symmetrical slots. In terms of operational efficiency, the quick locking mechanism, relying on the lever principle of the locking rod and the energy storage characteristics of the return spring, can simultaneously drive the double-sided elastic buckles to embed into the conductive terminal card with a single pressing action. The slot achieves millisecond-level locking with zero tool dependence, and the double-barbed structure of the elastic buckle and the wedge-shaped engagement of the V-shaped locking surface of the slot ensure constant contact pressure under vibration and impact. In terms of electrical reliability, the three-tiered structure of the wire diameter matching hole intelligently matches wires of different cross-sections. The evenly distributed annular barbs form a 360° continuous interlocking interface, maximizing the contact area between the wire core and the hole wall. The stress-relieving groove at the root of the barbs effectively suppresses metal fatigue fracture. Combined with the clearance tolerance design of the positioning wing plate and the limiting groove, contact resistance drift caused by thermal expansion is completely eliminated. Crucially, each subsystem generates synergistic gains—the precise guidance of the anti-misinsertion component reduces the risk of malfunction in the locking mechanism; the vertical locking force of the elastic buckle ensures that the barbs are always in optimal crimping condition; and the combined application of tellurium copper material in the conductive terminals and thermal grease constructs an efficient thermal management path from the contact point to the housing, ultimately achieving maintenance-free operation with a lifespan of tens of thousands of insertion and removal cycles. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] In the diagram, 1-insulating shell; 2-conductive terminal; 3-rectangular protrusion; 4-locking rod; 5-reset spring; 6-elastic buckle; 7-wire diameter adapter hole; 8-barbed protrusion; 9-positioning wing plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Example:

[0018] like Figure 1 As shown, a power terminal block with anti-misinsertion and quick-locking functions includes an insulating housing 1 and a plurality of conductive terminals 2 embedded in the insulating housing 1. The insulating housing 1 is characterized by: an asymmetric anti-misinsertion component on its front end face, comprising a rectangular protrusion 3 on the left, a trapezoidal groove on the right, and a guide rib in the middle; the rectangular protrusion 3 has a height of 8-10 mm, the trapezoidal groove has a depth of 5-7 mm, and the guide rib forms a 30° angle with the horizontal plane; a quick-locking mechanism is provided at the top of the insulating housing 1, consisting of a horizontally penetrating locking rod 4, a return spring 5 sleeved on the outside of the locking rod 4, and symmetrically distributed elastic buckles 6; the locking rod 4 extends to the outside of the insulating housing 1 at both ends to form an operating part; the lower end of the elastic buckle 6 is adapted to the slot on the top of the conductive terminal 2; a wire diameter adaptation hole 7 is provided at the rear end of the conductive terminal 2, with 3-4 barbed protrusions 8 circumferentially arranged on the inner wall of the hole, and symmetrically arranged positioning wing plates 9 on both sides of the conductive terminal 2, which cooperate with the limiting groove on the inner side of the insulating housing 1.

[0019] In the power distribution unit of the actual working scenario, this terminal, as the core electrical interface, implements the following workflow: When the operator inserts the docking terminal into this device, the asymmetric anti-misinsertion component on the front end of the insulating shell first initiates physical guidance—the rectangular protrusion on the left side and the L-shaped notch of the docking terminal form geometric repulsion. If the misinsertion direction deviation exceeds 5°, the side wall of the rectangular protrusion will rigidly block the insertion action; when correctly aligned, the dovetail tenon on the right side of the docking terminal slides into the trapezoidal groove on the right side of this terminal to form initial positioning. At the same time, the 30° inclined central guide rib guides the docking terminal to slide along the precise path. Its double rib structure disperses the lateral impact force at the moment of contact, so that the insertion process can achieve tactile perception alignment without visual assistance. When the insertion depth of the mating terminal reaches 8mm, its top cam surface contacts the lower inclined surface of the elastic buckle of the quick-locking mechanism, driving the symmetrically distributed elastic buckles to expand outward. At this time, the return spring sleeved on the outside of the locking rod enters the energy storage state. When it continues to advance to the 12mm full insertion position, the mating terminal slot aligns with the barbs of the elastic buckles. The operator presses down on the operating parts at both ends of the locking rod with one hand, and through the lever principle, forces the diameter abrupt step in the middle of the locking rod to move downward, pushing the elastic buckles to retract inward. Its double barb structure embeds into the V-shaped locking surface of the mating terminal slot, forming a self-locking wedge fit. The pre-compression force of the return spring is converted into a continuous vertical locking force. The whole process can be completed without tools and with one hand. At the same time, the wire diameter adapter hole at the rear end of the conductive terminal performs wire crimping: when 2.5mm 2 When the wire is inserted into the front end of the three-stage stepped hole, it is guided into the φ4.0mm diameter section. Four evenly distributed barbed protrusions on the inner wall of the hole pierce the insulation layer at a 30° angle, and stress-relieving grooves at the roots of the barbs prevent the copper core wire from being sheared and broken. If inserted at 1.5mm... 2 For thin wires, the wires automatically slide into the φ3.2mm diameter bore area in the middle section, where barbed protrusions form a 360° annular interlocking interface. The radial crimping force generated by the tooth tips adaptively matches the cross-sectional area of ​​the wire. The positioning wing plate and the limiting groove inside the insulating shell have an H8 / g7 clearance fit, allowing the conductive terminal to float slightly axially during thermal expansion, avoiding a drop in contact pressure due to shell creep. When a large current passes through, the high thermal conductivity of the tellurium copper material of the conductive terminal transfers heat to the positioning wing plate interface. The thermally conductive medium filled in the silicone grease cavity establishes a thermal bridge between the insulating shells, preventing a vicious cycle of contact resistance caused by local temperature rise.

[0020] The entire terminal matching linkage process is as follows: anti-misinsertion and locking linkage - the 30° tilt design of the guide rib makes the insertion trajectory of the mating terminal orthogonal to the movement axis of the locking rod, ensuring that the elastic buckle is only triggered when fully inserted, avoiding the fault of traditional terminals locking before they are in place;

[0021] Synergistic Crimping and Thermal Management – ​​The annular distribution of barbed protrusions ensures uniform diffusion of the conductor's heating points, which, combined with the thermal expansion tolerance of the wing plate gap, solves the risk of localized fusion welding in existing technologies where single-point puncture structures are broken.

[0022] Dynamic reliability assurance: Under vibration environment, the return spring of the locking rod continuously compensates for the wear of the elastic buckle, while the biting force of the barbed teeth forms a 120° angle with the wire tension (90° in traditional design), which significantly improves the resistance to vibration and wire breakage.

[0023] When traditional terminals use a symmetrical anti-misinsertion structure, the operator needs to visually adjust the insertion angle. This solution achieves tactile blind insertion through the topological asymmetry of rectangular protrusions and trapezoidal grooves. Screw-crimped terminals require step-by-step tightening with a torque wrench, while this locking mechanism completes the synchronous locking of all conductive terminals with a single press. For wire crimping, existing single-hole terminals often cut the thin wire core due to excessively deep countersunk teeth. This stepped hole structure achieves adaptive adjustment of crimping force through graded hole diameter guidance. The stress relief groove at the root of the countersunk teeth has a breakthrough solution to the problem of crimping force attenuation caused by cold creep of copper and aluminum wires.

[0024] In the asymmetric anti-misinsertion assembly, the top of the left rectangular protrusion 3 has an arc-shaped chamfer, and its outer wall is integrally formed with an anti-disengagement flange; the inner wall of the right trapezoidal groove 4 is symmetrically provided with elastic anti-slip ribs, which extend along the depth direction of the groove and are adapted to the anti-disengagement flange of the rectangular protrusion 3; the middle guide rib 5 has a transition arc on the side away from the front end face, and the surface of the guide rib 5 is covered with a wear-resistant coating. The operator brings the mating terminal close to the terminal by touch. When the left L-shaped notch of the mating terminal contacts the arc-shaped chamfer of the rectangular protrusion 3, the chamfer guides the notch to slide along the 30° slope to avoid damage from the edge; if the insertion angle is deviated, the anti-disengagement flange will jam the side wall of the mating terminal, and a corrective force of more than 15N is required to continue insertion (the traditional flangeless structure only requires 5N, which is prone to violent misinsertion). After proper alignment, the dovetail tenon on the right side of the mating terminal slides into the elastic anti-slip ridge of the trapezoidal groove. The anti-slip ridge undergoes 0.3mm elastic deformation under pressure, providing tactile feedback through frictional damping, allowing the operator to perceive the positioning status. During insertion, the wear-resistant coating of the guide rib 5 reduces the coefficient of friction between it and the mating terminal (μ≤0.08), and its back transition arc avoids stress concentration that could cause cracking at the rib root. When the mating terminal is pushed to the end, the anti-disengagement flange embeds into the locking recess of the mating terminal, forming a double lock with the anti-slip ridge in the trapezoidal groove.

[0025] In the quick-locking mechanism, the locking rod 4 is made of high-strength alloy material, and its outer wall has an annular positioning groove. The end of the return spring 5 is embedded in the positioning groove. The upper end of the elastic buckle 6 is hinged to the locking rod 4, and the lower end has a wedge-shaped head. The inner side of the head has anti-retraction teeth that match the slot. The outer surface of the operating part has knurled texture, and the contact part with the insulating shell 1 has a rubber buffer pad. When the mating terminal is inserted, the elastic buckle 6 expands, and the operator presses down on the operating part of the locking rod with one thumb. The knurled texture increases the friction during operation with the glove, and the buffer pad absorbs the impact energy of the downward pressure. The annular positioning groove of the locking rod 4 restricts the radial movement of the return spring 5, ensuring that the spring is only compressed axially (preload 3.2N). When the downward pressure reaches 2.5mm, the middle step of the locking rod pushes the elastic buckle 6 to rotate around the rivet, and its lower wedge-shaped head inserts into the slot of the mating terminal at a 55° angle. The serrated surface of the anti-retraction tooth forms a self-locking angle with the V-shaped wall of the slot, generating a 14N vertical locking force. If a 50Hz high-frequency vibration occurs during a robot emergency stop, the fluororubber buffer pad dampens the force, preventing the locking rod from resonating and loosening. When disassembly is required, the locking rod operating part is lifted to the free length of the return spring 5. The wedge-shaped locking head of the elastic buckle 6 is automatically expanded outwards by the chamfer of the mating terminal, achieving non-destructive separation. Compared to traditional screw locking methods, this process reduces the time to 2 seconds.

[0026] The wire diameter adaptation hole 7 of the conductive terminal 2 is a stepped through hole, with barbed protrusions 8 on its inner wall spirally distributed along the hole axis, and the ends of the protrusions having an arc-shaped structure. A flared guide opening is provided at the entrance of the wire diameter adaptation hole 7, and a conductive guide plate is provided between the inner wall of the guide opening and the barbed protrusions 8. The guide plate is integrally formed with the conductive terminal 2 body. A 2.5mm wire with a stripped length of 7mm is then used. 2 When the wire is inserted, the flared guide port guides the wire core into the φ4.0mm diameter section. The spiral-shaped barbed protrusions penetrate the wire at a 20° tangential angle, and the rounded tooth ends disperse localized pressure (conventional straight-tooth structures concentrate pressure and easily cut the copper wire). The guide plate elastically deforms under the thrust of the wire, forcing the wire core to twist 15° along the spiral tooth direction, achieving core stranding reinforcement. When inserted to a diameter of 1.5mm... 2 When using thin wires, the wire enters the φ3.2mm mid-section aperture, where the helical teeth generate a combined radial and axial biting force, increasing the pull-out resistance by 40% compared to the uniformly distributed annular teeth. After energization, the guide plate diverts the current from the biting point of the reverse teeth to the entire aperture wall, reducing the contact resistance to 0.28mΩ. If a 30A current is applied during continuous robot operation, the temperature rise of the conductive terminals is conducted to the guide plate, causing its cantilever beam structure to bend due to heat, increasing the contact pressure and compensating for the pressure loss caused by thermal expansion.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A power terminal block with anti-misinsertion and quick-locking functions, characterized in that, The device includes an insulating shell (1) and a plurality of conductive terminals (2) embedded in the insulating shell (1). The device is characterized in that: the front end face of the insulating shell (1) is provided with an asymmetric anti-misinsertion component, which includes a rectangular protrusion (3) on the left, a trapezoidal groove on the right, and a guide rib in the middle. The rectangular protrusion (3) has a height of 8-10 mm, the trapezoidal groove has a depth of 5-7 mm, and the guide rib forms a 30° angle with the horizontal plane; the top of the insulating shell (1) is provided with a quick-locking mechanism, which consists of a horizontally penetrating locking rod (4), a return spring (5) sleeved on the outside of the locking rod (4), and symmetrically distributed elastic buckles (6). Both ends of the locking rod (4) extend to the outside of the insulating shell (1) to form an operating part, and the lower end of the elastic buckle (6) is adapted to the slot on the top of the conductive terminal (2); the rear end of the conductive terminal (2) is provided with a wire diameter adaptation hole (7), and the inner wall of the hole is circumferentially decorated with 3-4 wire diameter fittings. Each has a barbed protrusion (8), and the conductive terminal (2) is symmetrically provided with positioning wing plates (9) on both sides, and the positioning wing plates (9) cooperate with the limiting groove on the inner side of the insulating shell (1).

2. A power terminal block with anti-misinsertion and quick-locking functions as described in claim 1, characterized in that: In the asymmetric anti-misinsertion assembly, the top of the left rectangular protrusion (3) is provided with an arc-shaped chamfer, and its outer wall is integrally formed with an anti-detachment flange; the inner wall of the right trapezoidal groove is symmetrically provided with elastic anti-slip ribs, which extend along the depth direction of the groove and are adapted to the anti-detachment flange of the rectangular protrusion (3); the middle guide rib is provided with a transition arc on the side away from the front end face, and the surface of the guide rib is provided with a wear-resistant coating.

3. A power terminal block with anti-misinsertion and quick-locking functions as described in claim 1, characterized in that: In the quick locking mechanism, the locking rod (4) is made of high-strength alloy material, and its outer side wall is provided with an annular positioning groove. The end of the reset spring (5) is embedded in the positioning groove. The upper end of the elastic buckle (6) is hinged to the locking rod (4), and the lower end is provided with a wedge-shaped buckle head. The inner side of the buckle head is provided with anti-retraction teeth that are compatible with the buckle groove. The outer surface of the operating part is provided with knurled texture, and the contact part between the operating part and the insulating shell (1) is provided with a rubber buffer pad.

4. A power terminal block with anti-misinsertion and quick-locking functions as described in claim 1, characterized in that: The wire diameter adapter hole (7) of the conductive terminal (2) is a stepped through hole, and the barbed protrusions (8) on its inner wall are spirally distributed along the hole axis. The ends of the protrusions are arc-shaped structures. A horn-shaped guide port is provided at the entrance of the wire diameter adapter hole (7). A conductive guide plate is provided between the inner wall of the guide port and the barbed protrusions (8). The guide plate and the conductive terminal (2) body are integrally formed.

Images