Plug terminal and electronic equipment

Abstract

The invention relates to the technical field of connectors, and discloses a plugging terminal and electronic equipment, and the plugging terminal comprises a main body guide rod part; the holding part is arranged at one end of the main body guide rod part so as to be matched with an external conductive hole; the transition part is arranged at the end, away from the main body guide rod part, of the holding part, a functional through hole is formed in the transition part, and an elastic arm protruding out of the holding part is formed by the functional through hole and the side edge of the transition part; the guide part is arranged at the end, away from the holding part, of the transition part, and the guide part is gradually shrunk in the direction from the position close to the transition part to the position away from the transition part. According to the invention, the structural reliability of the plugging terminal is improved.

Description

Technical Field

[0001] This application relates to the field of connector technology, specifically to a plug terminal and electronic device. Background Technology

[0002] Plug-in connectors achieve an interference fit with PCB conductive holes through elastic deformation. They have advantages such as no soldering required, easy assembly, repeated plugging and unplugging, vibration resistance, and minimal damage to board holes. Therefore, they are widely used in through-hole mounting (THT) processes.

[0003] In related technologies, the plug-in terminals have a non-penetrating blind hole in the middle of the terminal. This structure effectively enhances the overall strength and deformation resistance of the terminal, but its elastic deformation range is usually small. In the actual plugging process, two unfavorable situations are likely to occur: if the design is too tight, the insertion force will be too large, which will not only increase the assembly difficulty, but may also damage the PCB hole wall; if the design is too loose, the contact pressure between the terminal and the hole wall will be insufficient, which may lead to poor contact and unreliable electrical connection. Therefore, the tolerance adaptability of blind hole structure terminals is poor and the structural reliability is poor. Summary of the Invention

[0004] In view of this, this application provides a plug-in terminal and an electronic device to solve the aforementioned technical problems.

[0005] In a first aspect, embodiments of this application disclose a plug-in terminal, comprising: Main guide rod section; A retaining part is provided at one end of the main body guide rod to match an external conductive hole; A transition section is provided at one end of the retaining section away from the main guide rod section. The transition section is provided with a functional through hole, and the functional through hole and the side of the transition section form an elastic arm protruding from the retaining section. A guide portion is provided at one end of the transition portion away from the holding portion, and the guide portion gradually narrows from the direction close to the transition portion to the direction away from the transition portion.

[0006] In one possible example, the guide portion has a pre-insertion end at the end opposite to the transition portion, the pre-insertion end tapering from near the guide portion to away from the guide portion.

[0007] In one possible example, at least two of the functional vias are spaced apart on the transition portion along the width direction of the transition portion, and there are spacers separating the functional vias between adjacent functional vias.

[0008] In one possible example, the functional through-hole extends along the length of the transition portion close to the retaining portion and the guide portion, respectively.

[0009] In one possible example, the main guide rod portion is provided with a connecting shoulder that is close to and protrudes from the retaining portion.

[0010] In one possible example, the side of the retaining part forms a groove between the main guide rod part and the elastic arm, and a slope body inclined toward the groove is provided at the connection between the groove and the elastic arm.

[0011] In one possible example, the retaining part has a first functional groove and a second functional groove on its two opposite sides, and the retaining part located between the bottom of the first functional groove and the second functional groove constitutes an elastic bridge.

[0012] In one possible example, the resilient bridge is arranged in an arched structure.

[0013] In one possible example, the elastic bridge body is configured with a wave-like structure.

[0014] Secondly, embodiments of this application disclose an electronic device including the plug-in terminal described in any of the above embodiments.

[0015] In summary, compared with the prior art, this application discloses a plug-in terminal and an electronic device. The plug-in terminal includes: a main guide rod portion; a retaining portion, which is disposed at one end of the main guide rod portion to match an external conductive hole; a transition portion, which is disposed at the end of the retaining portion away from the main guide rod portion, and has a functional through hole, which together with the side of the transition portion forms an elastic arm protruding from the retaining portion; and a guide portion, which is disposed at the end of the transition portion away from the retaining portion, and the guide portion gradually narrows from near the transition portion to away from the transition portion. That is, through the above-mentioned arrangement, the structural reliability of the plug-in terminal is improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a front view structural diagram of the plug-in terminal of this application; Figure 2 This is a partial three-dimensional view of the plug-in terminal of this application; Figure 3 This is a cross-sectional structural diagram of the first type of retaining part in this application; Figure 4 This is a cross-sectional view of the second type of retaining part in this application; Figure 5 This is a cross-sectional view of the third type of retaining part in this application; Figure 6 This is a schematic diagram of the connection relationship of the plug-in terminals in this application.

[0018] Reference numerals: 1. Main guide rod; 11. Connecting shoulder; 2. Holding part; 21. First functional slot; 22. Second functional slot; 23. Elastic bridge body; 3. Transition part; 31. Spacer; 4. Functional through hole; 5. Elastic arm; 51. Slope body; 6. Guide part; 7. Pre-insertion end; 8. Groove; 9. PCB board. Detailed Implementation

[0019] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the claims.

[0020] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, components, features, and elements with the same names in different embodiments of this application may have the same meaning or different meanings, the specific meaning of which must be determined by its interpretation in that specific embodiment or further in conjunction with the context of that specific embodiment.

[0021] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0022] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" may be used interchangeably.

[0023] In the description of this application, it should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] The technical solutions shown in this application will be described in detail below through specific embodiments. It should be noted that the order of description of the following embodiments is not intended to limit the priority of the embodiments.

[0025] This application provides a plug-in terminal designed to optimize the plug-in performance with the conductive holes of external devices, and to solve the problems of poor plug-in compatibility, insufficient mechanical strength, and easy fatigue after long-term use of traditional fisheye terminals.

[0026] Please refer to Figure 1 and Figure 2 The plug-in terminal in this embodiment includes a main body guide rod 1, a holding part 2, a transition part 3 and a guide part 6, which are arranged sequentially and integrally formed along the plug-in direction (i.e. the direction in which the terminal is inserted into the external conductive hole, usually from top to bottom in the figure).

[0027] In the specific implementation process, the main guide rod part 1 serves as the rear end of the terminal and is used for electrical connection with external wires, connectors, or magnetic devices (such as through crimping, welding, etc.). It provides the main mechanical support and current conduction path for the terminal. The retaining part 2 is located at one end of the main guide rod part 1. It serves as the core area for achieving stable electrical contact and mechanical retention between the plug-in terminal and the external conductive hole (taking the PCB board as an example). The outer contour size of the retaining part 2 is designed to match the diameter of the conductive hole of the PCB board 9 to ensure that sufficient contact pressure can be obtained after plugging, thus ensuring low contact resistance and electrical reliability.

[0028] Furthermore, the transition section 3 is located at one end of the retaining section 2 away from the main guide rod section 1. The transition section 3 is provided with a functional through hole 4. The functional through hole 4 and the side of the transition section 3 together form an elastic arm 5 protruding from the retaining section 2. The elastic arm 5 is a thin-walled structure.

[0029] During the insertion of the terminal into the conductive hole of the PCB board 9, the elastic arm 5 can generate a large range of elastic deformation, thereby significantly reducing the insertion force, improving assembly convenience, and enhancing the versatility of the terminal for different board thicknesses or hole diameter tolerances. At the same time, since the deformation is mainly concentrated in the area of ​​the elastic arm 5 with a carefully designed thin-walled structure, rather than the entire terminal body, the stress distribution is more reasonable, which helps to reduce plastic deformation and fatigue accumulation, and improve the fatigue life and long-term insertion and removal stability of the terminal.

[0030] The guide portion 6 is located at one end of the transition portion 3 away from the holding portion 2, and the guide portion 6 gradually narrows from the direction close to the transition portion 3 to the direction far away from the transition portion 3. Preferably, the guide portion 6 forms a conical or arc-shaped guide surface to ensure that the terminal can be smoothly inserted into the conductive hole of the PCB board 9 when it is initially inserted, with good centering performance, and effectively prevents damage to the terminal or board hole caused by skewed insertion.

[0031] In the operation of the plug-in terminal in this embodiment, when the plug-in terminal is inserted into the conductive hole of the PCB board 9, the guide part 6 first guides the terminal to align. As the insertion goes deeper, the elastic arm 5 of the transition part 3 begins to contact the hole wall and undergoes elastic contraction under pressure. The insertion force required for this process is relatively small. When the terminal continues to be inserted until the retaining part 2 enters the board hole, the elastic arm 5 fully rebounds. At this time, the retaining part 2 generates the main contact pressure with the hole wall of the conductive hole. The entire plugging process is smooth, combining "large deformation of the transition part 3 to facilitate insertion" and "stable contact of the retaining part 2 to ensure connection". This embodiment combines the advantages of both through-hole terminals and blind-hole terminals. By concentrating the main elastic deformation function in the dedicated transition section 3 with functional through-hole 4, and giving stable electrical contact function to the retaining section 2 at the rear end, the terminal structure of this embodiment realizes the regionalization and optimization of functions. It combines the advantages of traditional through-hole terminals (easy to plug in) and blind-hole terminals (high strength) while avoiding their disadvantages. It has achieved significant improvements in plugging convenience, structural strength, fatigue resistance and hole diameter versatility. It is particularly suitable for electrical connection occasions that require high reliability, frequent plugging and unplugging or assembly efficiency.

[0032] It should be noted that, based on the fact that the functional through-hole 4 and the side of the transition portion 3 form an elastic arm 5 protruding from the retaining portion 2, when the plug-in terminal is inserted into the conductive hole of the PCB board 9, the protruding elastic arm 5 will contact the edge of the hole before the retaining portion 2. This forces the elastic arm 5 to begin contracting and deforming earlier, acting as a "precursor buffer." This allows the main, large-amplitude elastic deformation process to be concentrated on the elastic arm 5 of the transition portion 3, rather than on the retaining portion 2. This helps protect the structural integrity of the retaining portion 2, enabling it to better perform its "retention" and "insulation" functions after final placement. The design features a stable electrical contact function, and because the protruding elastic arm 5 is a thin-walled structure, it requires less force to begin deformation. This design optimizes the insertion force curve, making it easier for the terminal to be inserted in the initial and most difficult stage (entering the plate hole), improving the assembly feel. Furthermore, the arrangement of the functional through hole 4 and the elastic arm 5 clearly separates the "guiding and initial deformation zone" (transition section 3) and the "final holding and contact zone" (holding section 2) axially. This is a modular design concept that aims to allow each part to focus on its core task, which can theoretically optimize overall performance.

[0033] It is understandable that the elastic arm 5 protruding from the retaining part 2 has a preset height difference with the outer surface of the retaining part 2. Here, "height difference" refers to the difference in radial position between the outer surface of the elastic arm 5 and the outer surface of the adjacent retaining part 2 in a cross-section perpendicular to the insertion direction. This design means that, in its natural state, the "outer diameter" or effective contact profile of the elastic arm 5 is larger than the corresponding size of the retaining part 2 behind it. Therefore, when the plug-in terminal is inserted into the conductive hole of the PCB board 9, the elastic arm 5, which has a preset height difference and protrudes from the retaining part 2, first contacts the wall of the conductive hole and undergoes elastic contraction deformation, sliding into the hole with a relatively small insertion force. When it is inserted in place, that is, after the retaining part 2 is fully inserted into the conductive hole, the elastic arm 5, under the elastic action of the material... When the device returns to its original shape, due to the preset height difference, the outer surface of the spring-backed elastic arm 5 will have a larger spring-back space than the outer surface of the retaining part 2, and will apply a continuous expansion force to the conductive hole of the PCB board 9. Under the constraint of the PCB board 9, the expansion force is converted into an axial constraint on the plug-in terminal. The interference fit between the elastic arm 5 and the hole wall, combined with the contact fit between the retaining part 2 and the hole wall, together form a multi-point, cooperative axial locking structure, which effectively prevents the terminal from being pulled out due to vibration or external force. This additional locking force provided by the protruding elastic arm 5 directly assists and enhances the retaining function of the retaining part 2, making the entire terminal more firmly fixed in the hole, and significantly improving the reliability of vibration and impact resistance.

[0034] In one example, the guide portion 6 tapers from near the transition portion 3 to away from the transition portion 3 to form a straight conical structure, that is, the outer surface of the guide portion 6 forms a regular frustum or pyramid shape, so that the guide portion 6 provides a uniform and linear guiding force when the plug-in terminal is inserted into the conductive hole of the PCB board 9.

[0035] Alternatively, the guide portion 6 can be tapered from near the transition portion 3 to away from the transition portion 3 to form an outwardly convex arc structure. That is, the outer side of the guide portion 6 is a smooth curved surface that convexes outward, with an outline similar to a "bird's beak" or a teardrop head. This allows the guide portion 6 to quickly transition from point contact to surface contact with the conductive hole during the insertion of the plug terminal into the conductive hole of the PCB board 9. The contact stress distribution is more uniform, which can minimize scratches or extrusion deformation of the PCB board plating.

[0036] Alternatively, the guide portion 6 can be tapered from near the transition portion 3 to away from the transition portion 3 to form a concave arc structure, that is, the outer surface of the guide portion 6 is an inwardly concave curved surface, or it can be composed of multiple curves / straight lines, so that when the plug-in terminal is inserted into the conductive hole of the PCB board 9, it is beneficial to "capture" and accommodate the edge of the board hole with slight misalignment in the initial stage, and the fault tolerance is better.

[0037] In one example, the elastic arm 5 is constructed as a thin-walled structure with a consistent wall thickness to achieve uniform deformation and a relatively gentle stress distribution. Alternatively, the wall thickness of the thin-walled structure may not be uniform but may vary depending on the stress conditions. For example, the wall thickness of the root region where the elastic arm 5 connects to the transition portion 3 or the retaining portion 2 increases and gradually decreases towards the center to optimize stress distribution, prevent early fatigue fracture caused by stress concentration, avoid tearing of the elastic arm 5, and maximize its elastic stroke.

[0038] Alternatively, longitudinal ribs or corrugations can be added to the surface of the thin-walled structure of the elastic arm 5. This cross-sectional shape design can enhance local stability and anti-instability capabilities. That is, without significantly increasing the insertion force, the elastic arm 5 can be improved to resist bending and warping instability under pressure, making its deformation more controllable and consistent.

[0039] In one example, the functional through hole 4 is a closed profile hole that penetrates the transition section 3. Optionally, the functional through hole 4 is an oblong, elliptical, circular, dumbbell-shaped, or I-shaped through hole.

[0040] Preferably, the functional through-hole 4 is a rectangular through-hole. Thus, the functional through-hole 4 can naturally define parallel and equal-width elastic arms 5. This symmetry ensures that when the conductive hole of the PCB board 9 is inserted, the deformation and stress height of the elastic arms 5 on both sides are consistent, avoiding terminal misalignment, jamming, or abnormal wear on the board hole caused by uneven deformation. Moreover, the rectangular functional through-hole 4 provides uniform thin-wall support for the elastic arms 5 along its entire length, making its stiffness uniformly distributed in the length direction and its deformation controllable. At the same time, the functional through-hole 4 can fully optimize the rounded corners of the four inner corners, which can effectively guide and disperse the deformation stress from the fragile sharp corner area to the sides of the entire length of the elastic arm 5. This significantly reduces the stress peak and directly improves the fatigue life of the elastic arm 5.

[0041] In one example, the guide portion 6 has a pre-insertion tip 7 at the end opposite to the transition portion 3. The pre-insertion tip 7 tapers from near the guide portion 6 to away from the guide portion 6, forming a final guide tip. This tapering profile can be conical, pyramidal, or a smooth arc surface. Its core is to provide a smooth guide shape with a continuously decreasing cross-sectional area. That is, after the guide portion 6 completes the initial guidance and alignment, the smaller and thinner pre-insertion tip 7, as the structure that first contacts the conductive hole of the PCB board 9, can perform the final stage of precise alignment. Since the pre-insertion tip 7 has the smallest cross-sectional area and the initial contact area with the edge of the conductive hole of the PCB board 9 is small, the initial friction and insertion resistance are extremely low. This ensures that the terminal insertion action is extremely easy and smooth, significantly improving assembly efficiency, and is especially suitable for automated assembly equipment.

[0042] In one example, at least two functional through holes 4 are spaced apart along the width direction of the transition portion 3. The functional through-hole 4 located on the outermost side of the array on the transition section 3, together with the side of the transition section 3 itself, forms an elastic arm 5 protruding from the retaining section 2. This arrangement forms multiple parallel elastic deformation units on the transition section 3 to provide uniform and dispersed elastic deformation, effectively reducing the overall insertion force and optimizing the internal stress distribution. That is, the composite design of multi-hole array + outermost protruding elastic arm realizes the optimized partitioning and integration of elastic deformation function and mechanical locking function in structure. It not only disperses stress and improves durability through arraying, but also ensures uncompromising connection stability through a specially designed and robust protruding outer elastic arm. It is particularly suitable for critical electronic equipment and harsh vibration application environments with the highest requirements for connection reliability.

[0043] Among them, there is a spacer 31 between adjacent functional through holes 4 to separate the functional through holes 4. The spacer 31 is connected to the body of the transition part 3 along the length direction of the transition part 3, thereby clarifying the solid support structure between the multifunctional through holes 4, enhancing the overall rigidity and stability of the transition part 3, preventing multiple elastic arms 5 from interfering with each other or becoming unstable when deformed, so as to improve the structural reliability of the plug-in terminal.

[0044] Furthermore, the material of the spacer 31 may be the same as or different from that of the transition section 3. Specifically, the spacer 31 may be integrally formed with the transition section 3, for example, by using the same metal material, to ensure that the overall mechanical properties of the transition section 3, such as the elastic modulus and coefficient of thermal expansion, are completely matched, ensuring consistent coordination during deformation and avoiding internal stress caused by mismatch in material interface properties. On the other hand, the spacer 31 may be made of a different material than the transition section 3. For example, the body of the transition section 3 may be made of a high-elasticity copper alloy to ensure the performance of the elastic arm 5, while the spacer 31 may be made of a higher-strength, higher-rigidity alloy material to effectively suppress the mutual coupling and overall instability of the multiple elastic arms 5 during deformation, making the array structure of the transition section 3 more robust and reliable.

[0045] In one example, each functional through-hole 4 and the body material of the transition portion 3 on both sides can form an independent elastic arm 5. Multiple parallel and independent elastic arms 5 are formed on the transition portion 3. Thus, when the plug-in terminal is inserted into the conductive hole of the PCB board 9, multiple elastic arms 5 simultaneously contact the hole wall and deform. This design distributes the total plugging force to multiple smaller contact points, making the plugging force distribution in the width direction extremely uniform. This effectively avoids the possible deflection of the terminal due to excessive force on one side, ensuring a straight and smooth plugging trajectory. Moreover, the existence of multiple independent elastic arms 5 discretizes the deformation and stress. The deformation and stress level borne by each elastic arm 5 is lower than that of a single large elastic arm. This fundamentally reduces the peak stress of any single part, greatly improving the stress relaxation resistance and mechanical fatigue resistance of the entire transition portion 3, enabling the terminal to withstand more reliable plugging and unplugging cycles.

[0046] In one example, the functional through-hole 4 extends along the length of the transition portion 3, approaching the retaining portion 2 and the guide portion 6 respectively. That is, the functional through-hole 4 is not limited to the middle section of the transition portion 3, but extends towards both ends along the length of the transition portion 3, allowing the functional through-hole 4 to almost penetrate the majority of the effective length of the transition portion 3. This design greatly extends the effective working length of the elastic arm 5 defined by the functional through-hole 4. The deformation of the elastic arm 5 is essentially a bending behavior with a specific area as the fulcrum. According to the principles of material mechanics, under the same stress conditions, the longer the effective length of a component, the smaller the force required to produce the same deformation, and the more even the stress distribution. Because the effective working length of the elastic arm 5 is maximized, the radial pressure applied to the hole wall to achieve the required shrinkage when inserted into the conductive hole of the PCB board 9 is reduced. This directly translates to… The insertion force is reduced to a smaller and gentler one, which greatly improves the assembly feel and reduces the requirements of the drive mechanism on automatic insertion equipment. The deformation of the long elastic arm is more "relaxed", and the stress change gradient inside is gentle. Compared with the short deformation area, the maximum stress value can be significantly reduced. This directly solves the core defect of "through-hole terminals are prone to fatigue deformation" in related technologies, enabling the terminal to withstand several times more insertion and removal cycles than the traditional design, achieving a breakthrough in lifespan extension. At the same time, the long elastic arm extending to the vicinity of the holding part 2 and the guide part 6 forms a continuous and coherent flexible bridge across the entire length of the transition zone. This not only improves the deformation uniformity of the elastic arm 5 itself, but also promotes a smoother strain transition between it and the rigid parts before and after, making the overall posture of the terminal more stable during the insertion process, and improving the centering and straightness.

[0047] In one example, the main guide rod 1 is provided with a connecting shoulder 11, which is close to and protrudes from the retaining part 2. That is, the connecting shoulder 11 has two key features in space: first, it is close to the retaining part 2 in the axial direction; second, it protrudes from the outer surface of the retaining part 2 in the radial direction. This means that, when viewed in a cross section perpendicular to the insertion direction, the diameter of the envelope circle formed by the outer circumferential contour of the connecting shoulder 11 is larger than the corresponding outer diameter (or maximum width) of the retaining part 2. The side surface of the connecting shoulder 11 can be a straight surface perpendicular to the axis or a sloped surface with a guide taper to form an axial mechanical stop and achieve rigid locking. Specifically, after the plug-in terminal is inserted into the conductive hole of the PCB board 9, the connecting shoulder 11 abuts against the outer wall of the PCB board 9 to form a rigid and direct axial stop. Combined with the retaining part 2 which relies on friction and elastic interference, it can effectively resist continuous vibration, impact or accidental axial tension, so that the installation of the terminal has extremely high stability.

[0048] Furthermore, the presence of the connecting shoulder 11 clearly guides the reaction force of the PCB board 9 to the plug terminals, which means that the main supporting reaction force is borne by the structurally robust part of the connecting shoulder 11, rather than being borne entirely by the relatively flexible retaining part 2 or the elastic arm 5 of the transition part 3 for a long time. This design effectively avoids plastic deformation or stress relaxation in the retaining part 2 area due to long-term pressure, and precisely solves the problem in the background technology that "fatigue deformation is easy to occur after long-term use, affecting installation stability".

[0049] It should be noted that the side of the retaining part 2 forms a groove 8 between the main guide rod part 1 and the elastic arm 5. This groove 8 makes the retaining part 2 in this area form a relative "neck" between the main guide rod part 1 and the transition part 3. When the plug-in terminal is fully inserted into the conductive hole of the PCB board 9, the protruding elastic arm 5 forms interference and support at one end of the conductive hole of the PCB board 9. The retaining part 2 with the groove 8 is located in the conductive hole of the PCB board 9 as the constrained section, and the protruding connecting shoulder 11 is pressed against the PCB board 9 at the other end of the conductive hole, so that the PCB board 9 is like being actively clamped by a precision mechanical clamp, providing extremely stable axial and radial bidirectional locking that is far superior to a single interference point, and has excellent resistance to vibration and pull-out force.

[0050] Meanwhile, the groove 8 forms a preset, controllable flexible area. During the insertion process or when subjected to external force, this area allows the retaining part 2 to produce a small amount of coordinated deformation, thereby absorbing and releasing local stress and preventing excessive stress concentration at the rigid connection.

[0051] Furthermore, a slope body 51 inclined towards the groove 8 is provided at the connection between the groove 8 and the elastic arm 5. The slope body 51 is a smooth inclined or curved transition zone that extends from the end of the elastic arm 5 to the bottom area of ​​the groove 8 at a certain inclined angle. The key function of the slope body 51 is that it provides a smooth transition for the stiffness change from the elastic arm 5 to the groove 8, eliminating the abrupt stiffness interface and preventing the connection from becoming the origin of fatigue cracks. When the plug terminal is inserted into the conductive hole of the PCB board 9, after the elastic arm 5 is compressed and contracted, the elastic strain energy accumulated inside needs to be released quickly to achieve rebound. The inclined structure of the slope body 51 provides clear guidance and space for the micro-deformation of the material at the root of the elastic arm 5, so that the strain energy can be released smoothly along the inclined direction, rather than being locked in the connection corner. This significantly reduces the rebound hysteresis of the elastic arm 5, allowing it to recover its shape more quickly and fully after passing through the conductive hole, thereby establishing interference clamping force with the hole wall more quickly and reliably.

[0052] The slope body 51 structure is an active "mechanical coordinator". At the front end of the insertion process, it helps the elastic arm 5 to achieve efficient rebound and ensures the immediate establishment of locking force. At the rear end of the insertion process, it guides the retaining part 2 to smoothly enter the hole and avoids terminal jamming. By optimizing the geometry of this key connection point, it effectively improves the smoothness, speed and reliability of the terminal from dynamic insertion to static locking, which is especially suitable for high-speed automated assembly scenarios.

[0053] In one possible implementation of this application, see below. Figures 3 to 5 The retaining part 2 has a first functional groove 21 and a second functional groove 22 on its two opposite sides, and the retaining part 2 located between the bottom of the first functional groove 21 and the bottom of the second functional groove 22 forms an elastic bridge 23. The sides and / or bottom of the elastic bridge 23 are released by the functional grooves, giving it a certain degree of flexibility in the radial direction. This realizes the "micro-elasticity" function of the retaining part 2 itself, reducing the peak value of the final insertion force. That is, in the final stage of the insertion process, when the retaining part 2 enters the conductive hole of the PCB board 9, the traditional solid retaining part may generate a large, instantaneous interference force with the hole wall. In this embodiment, the elastic bridge 23 defined by the first functional groove 21 and the second functional groove 22 can generate a small amount of inward elastic contraction when squeezed by the hole wall. This "micro-elasticity" deformation effectively absorbs the impact energy of the insertion end, transforming the originally possible rigid collision into a flexible progressive contact, thereby smoothing the final insertion force curve, reducing the maximum value of the overall insertion force, and protecting the PCB hole wall.

[0054] Furthermore, the presence of the elastic bridge 23 transforms the retaining part 2 from a rigid column with fixed dimensions into an "elastic contact body" with a certain degree of self-adaptability. When facing PCB boards 9 with different thicknesses or slightly different hole diameters, the elastic bridge 23 can adaptively adjust its actual contact pressure and contact area with the hole wall through its slight deformation. This significantly improves the terminal's tolerance to manufacturing tolerances, ensuring a consistent and reliable connection effect on PCB boards from different production batches, and greatly enhancing the product's versatility and application range.

[0055] Thus, the elastic bridge 23 and the elastic arm 5 of the transition section 3 together form a two-stage elastic system. The elastic arm 5 is responsible for the large stroke and large deformation in the initial and middle stages of insertion to achieve smooth insertion and initial locking. The elastic bridge 23 of the holding section 2 is responsible for the micro stroke and fine pressure adjustment in the final stage of insertion to achieve smooth positioning and pressure self-adaptation.

[0056] In one example, the elastic bridge 23 is arranged in an arched structure, that is, the cross-sectional profile of the elastic bridge 23 is C-shaped. Specifically, the elastic bridge 23 protrudes into the second functional groove 22 between the first functional groove 21 and the second functional groove 22 in an arched structure, or protrudes into the first functional groove 21 in an arched structure. Due to the asymmetry of the C-shaped profile, the elastic bridge 23 has higher rigidity on its arched back (protruding side) and is relatively compliant on its open side. When the elastic bridge 23 enters the plate hole with the retaining part 2 and is subjected to uniform radial pressure, its deformation will preferentially occur on the open side, so that the contact pressure is more concentrated in the arched back area with higher rigidity. This effect allows for the selection of the arched protrusion direction ( Oriented towards the first functional slot 21 or the second functional slot 22), the main bearing side of the contact pressure between the retaining part 2 and the conductive hole of the PCB board 9 is pre-set and optimized, thereby adapting to specific spatial layout, force direction or signal transmission requirements. At the same time, the arch structure itself is an excellent mechanical form, which can efficiently convert radial load into compressive stress in the arch. The C-shaped elastic bridge 23 is like a miniature "arch bridge", providing excellent radial support stiffness for the retaining part 2. Especially in its convex direction, when the terminal is subjected to axial vibration, this arch support can effectively suppress the slight shaking of the retaining part 2 in the hole, significantly improving the connection stability and anti-fretting wear capability of the terminal under dynamic working conditions.

[0057] In one example, the elastic bridge 23 is configured with a wave-shaped structure, that is, the cross-sectional profile of the elastic bridge 23 is S-shaped. Specifically, the elastic bridge 23 has a continuous, smooth, curved "S" curve, forming a two-way curved wave-like structure. The continuous S-shaped curve eliminates any direct stiffness abrupt change points, allowing stress to be naturally and evenly transmitted and dispersed along the curve. This profile gives the elastic bridge 23 superior multi-directional deformation capability and higher fatigue life. When facing vibration or thermal cycling loads, the S-shaped profile can effectively absorb energy through its smooth deformation, providing better vibration damping and stress relaxation resistance, making it suitable for dynamic working environments.

[0058] Optionally, the cross-sectional profile of the elastic bridge body 23 can also be I-shaped, and the elastic bridge body 23 and the portion of the retaining part 2 without the first functional groove 21 and the second functional groove 22 can form an I-shaped structure, or the elastic bridge body 23 between the bottom of the first functional groove 21 and the second functional groove 22 and the retaining part 2 between the groove walls of the first functional groove 21 and the second functional groove 22 can form an I-shaped structure. Thus, the overall cross-section of the retaining part 2 has a relatively wide side area, and is connected by the elastic bridge body 23, which is a relatively narrow middle web. This structural design is highly optimized in terms of material distribution. Its wide side area provides strong bending stiffness, ensuring that the elastic bridge body 23 has excellent overall stability when subjected to radial pressure and is not prone to instability. At the same time, the narrow web gives it the necessary flexibility to produce the required micro-deformation. The I-shaped profile achieves an excellent balance between structural strength and elasticity, and is the preferred solution for achieving a highly reliable and high-holding-force connection.

[0059] It is understandable that the outer surfaces of the main guide rod 1, the retaining part 2, the transition part 3, the guide part 6, and the pre-insertion end 7 are all provided with a metal protective layer. This metal protective layer can be formed by electroplating, chemical plating, or selective plating processes to prevent the insertion terminals from oxidizing, sulfiding, or corroding in the air, thereby avoiding the problem of contact resistance increasing over time due to the formation of high-resistance compounds on the contact surface, and ensuring long-term stability and low loss of signal transmission.

[0060] It should be noted that the base of the plug-in terminal, especially the transition part 3 that constitutes the elastic arm 5, can be made of a variety of high-elasticity copper alloys. Optionally, the elastic arm 5 can be phosphor bronze, beryllium copper or copper-nickel-silicon alloy, so that the elastic arm 5 can perform well when subjected to frequent plugging and unplugging, and has the ability to resist permanent deformation and ultra-long fatigue life.

[0061] Continue to refer to Figure 6 This application also discloses an electronic device 100, including a plug-in terminal 200 as described in any of the above embodiments. The electronic device 100 is electrically and mechanically connected to an external device 300 (preferably a PCB board) through the plug-in terminal 200. The electronic device 100 may include magnetic devices, which use the plug-in terminal 200 as their pins or electrical interfaces. Preferably, the magnetic devices include, but are not limited to, inductors, network transformers, power transformers, current transformers, and common-mode chokes.

[0062] For other working principles and processes of the electronic device 100 in this embodiment, please refer to the description of the plug-in terminals in the aforementioned embodiment, which will not be repeated here.

[0063] The foregoing has provided a detailed description of the plug-in terminals and electronic devices provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. It should be noted that the descriptions of each embodiment in this application have different focuses; parts not described in detail or in a particular embodiment can be referred to in the relevant descriptions of other embodiments.

[0064] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. The technical features of the technical solution of this application can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are also included within the patent protection scope of this application, as long as the combination of these technical features does not contradict each other.

[0065] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only for the purpose of helping to understand the core ideas of the present application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present application. Therefore, the content of this specification should not be construed as a limitation of the present application.

Claims

1. A plug-in terminal, characterized in that, include: Main guide rod part (1); A retaining part (2) is provided at one end of the main body guide rod part (1) to match an external conductive hole; Transition section (3), the transition section (3) is located at one end of the retaining section (2) away from the main guide rod section (1), the transition section (3) is provided with a functional through hole (4), the functional through hole (4) and the side of the transition section (3) form an elastic arm (5) protruding from the retaining section (2). The guide portion (6) is located at one end of the transition portion (3) away from the holding portion (2), and the guide portion (6) gradually narrows from the direction close to the transition portion (3) to the direction away from the transition portion (3).

2. The plug-in terminal as described in claim 1, characterized in that, The guide portion (6) is provided with a pre-insertion end (7) at one end away from the transition portion (3), and the pre-insertion end (7) gradually narrows from the direction close to the guide portion (6) to the direction away from the guide portion (6).

3. The plug-in terminal as described in claim 1, characterized in that, At least two of the functional through holes (4) are spaced apart on the transition portion (3) along the width direction of the transition portion (3), and there is a spacer (31) between adjacent functional through holes (4).

4. The plug-in terminal as described in claim 1, characterized in that, The functional through hole (4) extends along the length of the transition portion (3) and approaches the holding portion (2) and the guide portion (6), respectively.

5. The plug-in terminal as described in claim 1, characterized in that, The main guide rod part (1) is provided with a connecting shoulder (11), which is close to and protrudes from the retaining part (2).

6. The plug-in terminal as described in claim 1, characterized in that, The side of the retaining part (2) forms a groove (8) between the main guide rod part (1) and the elastic arm (5), and a slope body (51) inclined toward the groove (8) is provided at the connection between the groove (8) and the elastic arm (5).

7. The plug-in terminal as described in claim 1, characterized in that, The retaining part (2) has a first functional groove (21) and a second functional groove (22) on its two opposite sides, and the retaining part (2) located between the bottom of the first functional groove (21) and the second functional groove (22) forms an elastic bridge (23).

8. The plug-in terminal as described in claim 7, characterized in that, The elastic bridge body (23) is set in an arched structure.

9. The plug-in terminal as described in claim 7, characterized in that, The elastic bridge body (23) is configured with a wave-shaped structure.

10. An electronic device, characterized in that, Includes the plug-in terminal as described in any one of claims 1 to 9.

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