Profiling connecting device

Abstract

The utility model discloses a profiling connecting device, which is used for connecting a female seat connector to test a battery management system, and comprises a profiling connector and a propelling component, the profiling connector comprises a plug and a base, the plug protrudes out of the base, one end, deviating from the base, of the plug is provided with a plugging surface, the plugging surface is provided with a plurality of jacks, the edge of the plugging surface and the edges of the jacks are provided with transition surfaces, and the transition surfaces are used for correcting deviation in the process that the propelling part propels the profiling connector to be connected with the female seat connector; the propelling component is provided with a fixing column, the base is provided with a fixing hole, and the fixing column is inserted into the fixing hole and movably connected with the profiling connector and the propelling component, so that the profiling connector can freely move in the propelling direction of the non-profiling connector according to the deviation rectifying effect of the transition face. The profiling connecting device provided by the utility model can control the test equipment to automatically rectify deviation so as to realize accurate blind plugging of the profiling connector and the connector female seat.

Description

Technical Field

[0001] The utility model relates to the technical field of connectors, in particular to a contour-profiling connection device. Background Art

[0002] In the production and quality control of battery management systems (BMS), ensuring that every battery panel meets design and performance specifications is crucial. As the final checkpoint in product quality control, the EOL (end-of-line) testing process requires multiple steps, including data collection, testing / measurement, and information verification, to ensure that every function of the BMS product meets design requirements.

[0003] Traditional testing solutions rely primarily on operators manually plugging and unplugging standard connectors. This method is not only inefficient but also prone to damage to the connectors and wiring harnesses, as well as reduced product quality due to stress damage during the plugging and unplugging process. Furthermore, manual operation has a relatively high error rate and cannot guarantee the consistency and accuracy of each connection, thus affecting the reliability of test results and the ultimate performance of the product. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention proposes a contour connection device that can control the automatic deviation correction of the test equipment to achieve accurate blind plugging and unplugging of the contour connector and the connector socket.

[0005] According to the contour connection device of the present invention, it is used to connect the female connector to test the battery management system. The contour connection device includes a contour connector and a propulsion component;

[0006] The contoured connector includes a plug and a base, the plug protruding from the base, a plug-in surface provided at one end of the plug facing away from the base, a plurality of sockets provided on the plug-in surface, and transition surfaces provided at the edges of the plug-in surface and the sockets, the transition surfaces being used to correct deviation during the process in which the propulsion component propels the contoured connector to connect with the female connector;

[0007] The propulsion component is provided with a fixing column, and the base is provided with a fixing hole. The fixing column is inserted into the fixing hole and movably connects the contour connector and the propulsion component, so that the contour connector can move freely in the propulsion direction other than the propulsion direction of the contour connector according to the correcting effect of the transition surface during the process of the propulsion component propulsing the contour connector and the female connector.

[0008] A contour connection device according to an embodiment of the present invention has at least the following beneficial effects:

[0009] This utility model provides a transition surface between the edge of the plug-in surface and the edge of the jack of the profiling connector. During the battery management system (BMS) test, when the profiling connector is connected to the connector base, the fixing column can move freely in the fixing hole in the direction of the non-profiling connector according to the correction effect of the transition surface, thereby automatically guiding and correcting the center position of the connection process, so that the pins on the base connector can be accurately inserted into the jack on the plug-in bottom surface. Compared with the existing technology that requires manual plug-in and plug-out correction, the test equipment can be controlled to automatically correct the deviation, thereby achieving accurate blind plugging / unplugging of the profiling connector and the connector base.

[0010] According to some embodiments of the present invention, a spring is arranged around the outside of the fixing column, and the spring is clamped between the contoured connector base and the propulsion component. The diameter of the fixing hole is configured based on the preset first diameter size difference of the fixing column diameter.

[0011] According to some embodiments of the present invention, the diameter of the fixing hole is 1.2-1.5 times the diameter of the fixing column.

[0012] According to some embodiments of the present invention, a positioning rib is provided on the fixing column, and a positioning groove is provided on the inner wall of the fixing hole.

[0013] According to some embodiments of the present invention, the cross-sectional area of ​​the positioning rib is smaller than the cross-sectional area of ​​the positioning groove, and the cross-sectional area of ​​the positioning rib is configured based on the cross-sectional area of ​​the positioning groove based on a preset first diameter size difference.

[0014] According to some embodiments of the present invention, the fixing hole passes through the base.

[0015] According to some embodiments of the present invention, the inner surface of the fixing hole and the outer surface of the fixing hole are flexible material layers.

[0016] According to an automatic testing assembly according to the second aspect of the present invention, a plurality of fixing columns are provided on the propulsion component, and a plurality of fixing holes are provided on the base.

[0017] According to some embodiments of the present invention, the transition surface is an oblique straight surface or a curved surface.

[0018] According to some embodiments of the present invention, the outer surface of the plug or the base is a flexible material layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0020] Figure 1 A schematic diagram of a connector interface of a battery management system to be tested provided in an embodiment of the present utility model;

[0021] Figure 2 A schematic diagram of a connection of a contoured connection device provided in an embodiment of the present utility model;

[0022] Figure 3 A schematic structural diagram of a contoured connector provided in an embodiment of the present utility model;

[0023] Figure 4 A schematic structural diagram of a jack of a contoured connector provided in an embodiment of the present utility model;

[0024] Figure 5 A perspective view of a connection of a contoured connection device provided in an embodiment of the present invention;

[0025] Figure 6 A schematic structural diagram of a female connector provided in an embodiment of the present utility model;

[0026] Figure 7 A schematic diagram of the first-level deviation correction provided by an embodiment of the present utility model;

[0027] Figure 8 A schematic diagram of the secondary deviation correction provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0030] The end-of-line (EOL) testing process for battery management systems (BMS) is a critical step in ensuring that BMS products meet all design and performance specifications before leaving the production line and entering the market. This process encompasses a comprehensive series of tests designed to verify the functionality, performance, and reliability of each BMS unit to ensure it can effectively manage the battery pack and ensure safe use. Traditional testing methods rely on operators manually plugging and unplugging standard connectors to test them. This method is not only inefficient but also carries the risk of physical damage to the equipment. The inevitable stress damage caused by manual plugging and unplugging, such as connector wear, deformation, and even breakage, as well as damage to the wiring harness, directly impacts product quality and subsequent service life. Besides physical damage, another significant drawback of manual operation is the high error rate. Due to a lack of consistency and precise control, each connection can be slightly different. This variability significantly reduces the reliability of test results, ultimately affecting the performance and reliability assessment of the entire product.

[0031] like Figure 1 As shown, Figure 1 A schematic diagram of the connector interface of the battery management system to be tested provided in an embodiment of the present invention shows that connector interfaces D, E, and F are provided on one side of the entire BMS product, and connector interfaces A, B, and C are provided on the other opposite side. However, since these connector interfaces are independently surface mount technology (SMT) mounted and soldered, the spacing between the various connector interfaces is not uniform. Although each deviation may be very small, their accumulation may affect the final assembly of the BMS and the connection with external devices, especially when multiple interfaces need to be precisely aligned. Therefore, how to cleverly control the machine to achieve automatic and precise plugging and unplugging is a difficult problem that needs to be solved.

[0032] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention sets a transition surface on the edge of the plug-in surface and the edge of the socket of the profiling connector. During the battery management system (BMS) test process, when the profiling connector is connected to the connector socket, the fixing column is used to move freely in the propulsion direction of the non-profiling connector in the fixing hole according to the correction effect of the transition surface, so that the connection process is automatically guided and corrected to the center position, so that the pins on the socket connector can be accurately inserted into the socket on the plug-in bottom surface. Compared with the manual plug-in correction required in the prior art, the test equipment can be controlled to automatically correct the deviation to achieve accurate blind plugging / unplugging of the profiling connector and the connector socket.

[0033] like Figure 2 As shown, Figure 2This is a schematic structural diagram of a contour connection device provided in an embodiment of the present invention. The contour connection device is used to connect a female connector to test a battery management system. The contour connection device includes a contour connector 100 and a propulsion component 200.

[0034] like Figure 3 As shown, the contoured connector 100 includes a plug 110 and a base 120. The plug 110 protrudes from the base 120. The end of the plug 110 away from the base 120 is provided with a plug-in surface, a plurality of jacks 111 are provided on the plug-in surface, and a plug-in transition surface 112 is provided on the edge of the plug-in surface. Figure 4 As shown, a socket transition surface 113 is provided on the edge of the socket. The plug-in transition surface 112 and the socket transition surface 113 are used to correct the deviation when the pushing component 200 pushes the contour connector 100 to connect with the female connector.

[0035] In some embodiments, the plug-in transition surface 112 or the socket transition surface 113 is an oblique straight surface or a curved surface.

[0036] Among them, if there is a slight position deviation during the plugging and unplugging process of the inclined surface structure, the plugging and unplugging bottom surface or side surface of the plug 110 touches the female connector first, or the pin is not inserted into the jack 111 at the center, the slope of the inclined surface can generate a displacement adjustment force to correct the position of the plug 110 itself, thereby facilitating precise alignment.

[0037] Compared with the inclined surface, the curved surface structure can provide a smoother transition and guidance. In the case of large deviation, the position can be gradually adjusted to reduce the impact on the female connector. At the same time, the softness of the curved surface structure is also conducive to reducing wear.

[0038] Through this transition surface design, precise alignment is gradually achieved through the sliding friction and extrusion force between the surfaces, laying the foundation for subsequent guidance and insertion.

[0039] It is understandable that the design of the jack transition surface 113 reflects the idea of ​​graded correction, and position calibration is performed in two stages during the entire plugging process:

[0040] The first stage is to perform a large-scale primary position correction when the plug 110 and the female socket are integrally connected through the plug-in transition surface 112 mentioned above.

[0041] In the second stage, the precise alignment between each pin and the socket is adjusted in the second half of the connection through the socket transition surface 113 set on the inner wall and bottom surface of the socket 111 to ensure the accuracy of the plugging.

[0042] By processing the large-scale and small-scale position calibration separately, the correction efficiency and accuracy are improved. The socket transition surface 113 can also adjust the deviation when the pin is inserted through some small inclined or curved transition structures, so that the pin can be fully and accurately inserted into the socket.

[0043] like Figure 5 As shown, the propulsion component 200 is provided with a fixing column 210. Figure 4 As shown, the base 120 is provided with a fixing hole 121, and the fixing column 210 is inserted into the fixing hole 121, movably connecting the contour connector 100 and the propulsion component 200, so that the contour connector 100 can move freely in the propulsion direction of the non-contact connector 100 according to the corrective effect of the transition surface. In this way, the contour connector 100 can move freely in the propulsion direction of the non-contact connector 100 according to the corrective effect of the transition surface when the propulsion component 200 propels the contour connector 100 to connect with the female connector.

[0044] The fixing post 210 on the propulsion component 200 cooperates with the fixing hole 121 on the base 120 to form a movable connection mechanism. This mechanism allows relative movement between the contour connector 100 and the propulsion component 200 within a certain range. The transition surface of the contour connector 100 is designed to achieve deviation correction during the connection process. When the fixing post 210 is inserted into the fixing hole 121, any slight deviation can be automatically corrected by the deformation or movement of the transition surface, ensuring that the contour connector 100 can be correctly aligned with the female connector. Due to the movable connection between the fixing post 210 and the fixing hole 121, the contour connector 100 can move freely in the non-contact propulsion direction. This means that even if the propulsion component 200 is pushed in a specific direction, the contour connector 100 can be fine-tuned in other directions as needed.

[0045] like Figure 5 As shown, in some embodiments, a spring 220 is arranged around the outside of the fixing column 210, and the spring 220 is clamped between the base 120 and the propulsion component 200. The diameter of the fixing hole 121 is configured based on the preset first diameter size difference of the diameter of the fixing column 210.

[0046] By reserving a certain diameter difference between fixing hole 121 and fixing post 210, fixing post 210 can have a certain amount of room for movement within fixing hole 121, rather than being strictly fixed. This provides the necessary flexibility and buffer space, and the optimal range of diameter difference can be reasonably determined based on actual needs, stress analysis, etc., to ensure appropriate mobility of contoured connector 100 while preventing excessive swing that may affect accuracy.

[0047] The presence of spring 220 provides an elastic buffer for the movable connection between fixing column 210 and fixing hole 121. When the plugging and unplugging force is transmitted to base 120, spring 220 can be compressed appropriately to absorb the impact, preventing excessive stress from directly acting on the fixing structure. Due to the elastic properties of spring 220, even if base 120 moves slightly during plugging and unplugging, spring 220 will automatically reset once the external force disappears, returning base 120 to its original position and ensuring positioning accuracy during the next plugging and unplugging.

[0048] Furthermore, the design of the spring 220 prevents a completely rigid connection between the fixing post 210 and the fixing hole 121. Instead, the base 120 is given a moderate degree of freedom of movement based on the diameter difference, helping to better absorb external shocks and positional deviations. This method of using the spring 220 simplifies assembly and disassembly, and the spring 220 is easily replaceable, which improves the maintenance and service life of the contoured connector 100.

[0049] In some embodiments, the diameter of the fixing hole 121 may be 1.2 to 1.5 times the diameter of the fixing post 210 .

[0050] In some embodiments, a positioning rib is provided on the fixing column 210 , and a positioning groove is provided on the inner wall of the fixing hole 121 .

[0051] The positioning ribs can be evenly distributed on the sides of the fixing column, increasing the number of contact points between the fixing column and the fixing hole, thereby improving the positioning accuracy of the fixing column within the fixing hole. Corresponding to the positioning ribs of the fixing column, several positioning grooves are designed on the inner wall of the fixing hole. The shape and size of these positioning grooves match the positioning ribs, ensuring that the fixing column can be accurately embedded in the positioning grooves when inserted into the fixing hole.

[0052] In some embodiments, the cross-sectional area of ​​the positioning rib is designed to be smaller than the cross-sectional area of ​​the positioning slot. This size difference is configured based on a preset first diameter size difference. This design ensures that the positioning rib can slide smoothly within the positioning slot to accommodate minor size differences that may occur during installation, while also ensuring sufficient contact area to maintain the stability of the fixing column.

[0053] The positioning ribs and slots work together to effectively limit the position of the fixing post within the fixing hole. This limiting action prevents excessive shaking of the contoured connector during connection or disconnection, ensuring a stable and reliable connection.

[0054] In some embodiments, the fixing hole 121 extends through the base 120, forming a through-hole structure. This design allows the fixing post 210 to be inserted from one side of the base and protrude from the other side, thereby securing the contour connector. The through-hole design simplifies the assembly process, making the insertion and securing of the fixing post 210 more straightforward and convenient. Furthermore, this design facilitates disassembly and reassembly when the contour connector needs maintenance or replacement.

[0055] In some embodiments, the inner surface of the fixing hole 121 and the outer surface of the fixing hole 121 are formed of a flexible material layer.

[0056] Among them, the flexible material layer can provide additional elasticity, which helps to cushion the impact force during the connection and disconnection process and reduce the wear on the fixing column and the fixing hole. The flexible material layer can be deformed to a certain extent according to the shape of the fixing column, and can adapt to the slight size differences that may exist between the fixing column and the fixing hole, thereby improving the adaptability of the connecting device.

[0057] In some embodiments, the outer surface of the plug 110 or the base 120 is a layer of flexible material.

[0058] Among them, the flexible material layer can provide additional cushioning, absorb the impact force that may be generated during the connection or disconnection process, and reduce direct damage to the plug or base. At the same time, it has good wear resistance and impact resistance. Using this type of material on the outer surface can extend the service life of the plug and base.

[0059] It is understood that the flexible material layer, such as rubber, has a high coefficient of friction, which helps to fix the position of the plug or base during the connection process and prevent accidental slipping.

[0060] In some embodiments, a plurality of fixing columns 210 are provided on the propulsion component 200 , and a plurality of fixing holes 121 are provided on the base 120 .

[0061] Among them, the design of multiple fixing columns 210 and fixing holes 121 provides multi-point support, increases the contact points between the contoured connector and the propulsion component, thereby improving the stability of the overall structure. The setting of multiple fixing columns and fixing holes can disperse the force during connection, reduce stress concentration at a single connection point, and improve the strength and reliability of the connection.

[0062] It is understandable that if a problem occurs with a fixing column or fixing hole, other fixing points can serve as redundant support to ensure the continued operation of the connection device, thereby improving the fault tolerance of the system.

[0063] In some embodiments, as Figure 2 As shown, fixing holes 121 are provided at the four corners of the base 120. Figure 1As shown, the base 120 and the propulsion component 200 are fixed by inserting the fixing column 210 into the fixing hole 121 , wherein the fixing hole 121 is used to accommodate the fixing column 210 .

[0064] By providing fixing holes 121 at the four corners of the base 120, fixing posts 210 can be used to securely connect it to the propulsion component 200. Inserting the fixing posts 210 into the fixing holes 121 secures the base 120 to the propulsion component 200, allowing the entire contour connector 100 to be moved and plugged in and out by the propulsion component 200. By securing the base 120 at the four corners, the base 120 is well positioned and supported, maintaining excellent stability and preventing excessive shaking. Furthermore, the fixing posts 210 themselves also play a role in transmitting force and positioning, ensuring a secure connection for the contour connector 100.

[0065] like Figure 5 As shown, the second aspect of the present invention provides an automatic testing component, including the aforementioned contour connection device and a connector socket 300 matching the contour connection device, the connector socket 300 includes a socket 310, and a recessed bottom surface of the socket 310 is provided with a plurality of pins 311, each pin 311 matches a socket 111 on the contour connector 100, wherein the socket 310 is used to accommodate the plug 110.

[0066] This design allows precise docking of the contoured connector 100 and the connector socket 300, enabling automated testing of the battery management system. The two establish an electrical connection through the one-to-one matching of pins 311 and sockets 111. Furthermore, the contoured connector 100 itself incorporates innovative mechanisms such as graded deflection correction, which accurately corrects positional deviations during the insertion process, ensuring stable and precise alignment of each pair of pins 311 and sockets 111.

[0067] In some embodiments, an auxiliary transition surface 312 matching the plug-in and pull-out transition surface 112 of the contoured connector 100 is provided between the outer surface of the socket 310 and the inner wall of the socket 310 .

[0068] Among them, the auxiliary transition surface 312 can interact and guide with the plug-in transition surface 112, so that the contoured connector 100 can passively accept the position correction of the female socket side when docking and plugging with the female socket 300, thereby further improving the overall correction accuracy.

[0069] By designing the shape of the auxiliary transition surface 312 to be a slope or curved surface that complements the plug-in transition surface 112, the two can achieve more precise displacement correction when in contact and sliding, ensuring good position transmission like interlocking gears.

[0070] In some embodiments, the contact tip of the pin 311 may also be provided with a correction transition surface 313 to match the socket transition surface 113 of the contoured connector 100 .

[0071] The coordinated design of the correction transition surface 313 and the jack transition surface 113 specifically fine-tunes the alignment between the pin and the jack, ensuring highly precise alignment within the smallest possible range, thus guaranteeing complete electrical connection reliability. The entire automated test assembly implements progressive correction, from large to small, with increasing accuracy, significantly enhancing the system's fault tolerance and adaptability. The correction transition surface 313 and the jack transition surface 113 also utilize complementary geometric shapes, such as detailed bevels or curved surfaces, to precisely engage, guide, and correct relative motion during contact, preventing binding or slipping.

[0072] In some embodiments, the geometric shape of the correction portion is fine-tuned and optimized, such as adding a stepped or wavy guide shape, or optimizing the slope and curvature, to further improve the guidance accuracy and smoothness. The optimized shape parameters can be analyzed through simulation, and the specific shape selection is not limited in this embodiment.

[0073] The corrective part should be made of a material that is both strong and wear-resistant, while also possessing good self-lubrication and anti-adhesion properties to prevent sticking during long-term use. Polymer materials, composite materials, or surface coatings can be used.

[0074] In some embodiments, the cross-sectional dimensions of the plug 110 and the hollow cross-sectional dimensions of the socket 310 are configured based on a preset first cross-sectional dimension condition.

[0075] By presetting the cross-sectional dimensions, the clearance between the plug 110 and the socket 310 can be precisely controlled to achieve the desired level of precision, providing an appropriate clearance margin for plugging and unplugging, and avoiding interference and jamming. Appropriate cross-sectional clearance matching not only affects positioning accuracy, but also the resistance and smoothness of plugging and unplugging. Therefore, this pre-set condition helps to achieve a balance between precision and smoothness. Reasonable setting of the cross-sectional dimensions helps to reduce the possible positional deviation between the plug 110 and the socket 310, forming a good match with the innovative correction structure mentioned above.

[0076] In some embodiments, the workflow of the entire automated plug-in test is as follows:

[0077] S1, the control valve is opened, and the propulsion component 200 pushes the contour connector 100 to initially enter the female seat 300 interface. In this initial stage, Figure 7 As shown, the plug-in transition surface 112 of the contoured connector 100 interacts with the auxiliary transition surface 312 of the female socket 300 to correct and center the overall position over a relatively large range.

[0078] S2, as the process continues, if there is a position deviation, the reserved movable gap between the contour connector 100 and the female socket 300 allows them to self-adjust and complete further self-correction alignment.

[0079] S3, when the plug 110 gradually approaches the pin 311, the second level correction mechanism is activated, such as Figure 8 As shown, the socket transition surface 113 of the contoured connector 100 is precisely matched with the correction transition surface 313 at the top of the pin 311, achieving second-order precision correction guidance for the microscopic position of the pin and the socket.

[0080] S4, finally the plug 110 and the pin 311 are fully and accurately aligned and plugged into each other, reaching the designed terminal position.

[0081] This phased deflection correction strategy leverages the advantages of the Contour Connector 100's precision deflection correction mechanisms at all levels, greatly improving the reliability and adaptability of the entire automated test and plugging process. It can effectively address potential position deviations under various complex working conditions and ensure accurate connections for every test.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A contour connection device, characterized in that: Used to connect the female connector to test the battery management system, the contour connection device includes a contour connector and a propulsion component; The contoured connector includes a plug and a base, the plug protruding from the base, a plug-in surface provided at one end of the plug facing away from the base, a plurality of sockets provided on the plug-in surface, and transition surfaces provided at the edges of the plug-in surface and the sockets, the transition surfaces being used to correct deviation during the process in which the propulsion component propels the contoured connector to connect with the female connector; The propulsion component is provided with a fixing column, and the base is provided with a fixing hole. The fixing column is inserted into the fixing hole and movably connects the contour connector and the propulsion component, so that the contour connector can move freely in the propulsion direction other than the propulsion direction of the contour connector according to the correcting effect of the transition surface during the process of the propulsion component propulsing the contour connector and the female connector.

2. The contoured connection device according to claim 1, characterized in that A spring is arranged around the outside of the fixing column, and the spring is clamped between the contoured connector base and the propulsion component. The diameter of the fixing hole is configured based on a preset first diameter size difference of the diameter of the fixing column.

3. The contoured connection device according to claim 2, characterized in that The diameter of the fixing hole is 1.2-1.5 times the diameter of the fixing column.

4. The contoured connection device according to claim 2, characterized in that: The fixing column is provided with a positioning rib, and the inner wall of the fixing hole is provided with a positioning groove.

5. The contoured connection device according to claim 4, characterized in that: The cross-sectional area of ​​the positioning rib is smaller than the cross-sectional area of ​​the positioning groove, and the cross-sectional area of ​​the positioning rib is configured based on the cross-sectional area of ​​the positioning groove based on a preset first diameter size difference.

6. The contoured connection device according to claim 1, characterized in that The fixing hole passes through the base.

7. The contoured connection device according to claim 1, characterized in that The inner surface of the fixing hole and the outer surface of the fixing hole are flexible material layers.

8. The contoured connection device according to claim 1, characterized in that The propulsion component is provided with a plurality of fixing columns, and the base is provided with a plurality of fixing holes.

9. The contoured connection device according to claim 1, characterized in that The transition surface is an oblique straight surface or a curved surface.

10. The contoured connection device according to claim 1, characterized in that The outer surface of the plug or the base is a flexible material layer.

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