Fool-proof connection terminal structure

Abstract

This application provides a foolproof connection terminal structure, relating to the field of electrical connector technology. The foolproof connection terminal structure includes a first connector and a second connector, both with an outer adhesive layer on their outer sides. The first connector has a first insertion interface at its end, and the outer adhesive layer has a first foolproof structure and a first mating portion sequentially arranged along the direction away from the insertion interface on its outer peripheral wall. The second connector has a second insertion interface at its end, and the outer adhesive layer has a corresponding second foolproof structure and a second mating portion formed on its inner wall. During insertion, the first and second foolproof structures cooperate to achieve key matching and identification, preventing mis-insertion of different functional interfaces; the first and second mating portions cooperate to seal the insertion gap, improving sealing performance. The foolproof connection terminal structure provided by this application, through its integrally formed foolproof and sealing features with the outer adhesive layer, helps simplify connector construction and reduce the risk of mis-insertion in multi-interface application scenarios.

Description

Technical Field

[0001] This invention relates to the field of electrical connector technology, and more specifically, to a foolproof connection terminal structure. Background Technology

[0002] Due to its small size and convenient reversible plug-in feature, the Type-C interface is widely used in various micro electronic devices and vehicle scenarios such as electric bicycles.

[0003] In the field of electric-assist bicycles, the Type-C interface is commonly used for signal transmission and low-voltage power connections between components such as batteries and controllers, controllers and motors, and instruments and controllers. In existing technologies, the insulation structure of Type-C connectors typically employs either integral injection molding or an embedded insulating sleeve.

[0004] However, while existing connector structures support reversible plugging, they also allow for interoperability between interfaces with different functions. When a device has multiple Type-C interfaces of the same type but with different functions, the existing universal Type-C interface structure cannot prevent or indicate incorrect plugging of interfaces with different functions, posing a risk of circuit failure or equipment damage due to misplugging. Summary of the Invention

[0005] The purpose of this invention is to provide a foolproof connection terminal structure to alleviate the technical problem that the existing general-purpose Type-C interface structure cannot prevent or indicate incorrect plugging of interfaces with different functions, and there is a risk of circuit failure or equipment damage due to incorrect plugging.

[0006] The present invention provides a foolproof connection terminal structure, comprising: a first connector and a second connector.

[0007] Both the outer side of the first connector and the outer side of the second connector are provided with an outer adhesive layer.

[0008] The first connector has a first insertion interface at its end. The outer adhesive layer forms a first anti-foolproof structure and a first fitting portion on the outer peripheral wall of the first connector. The first anti-foolproof structure and the first fitting portion are arranged sequentially in a direction away from the first insertion interface.

[0009] The end of the second connector is formed with a second plug-in interface that is adapted to the first plug-in interface. The outer adhesive layer forms a second anti-foolproof structure and a second fitting part on the inner wall of the second plug-in interface. The second anti-foolproof structure and the second fitting part are arranged sequentially in a direction away from the second plug-in interface.

[0010] When the first connector and the second connector are inserted, the first anti-foolproof structure cooperates with the second anti-foolproof structure, and the first fitting part cooperates with the second fitting part to close the gap between the first insertion interface and the second insertion interface.

[0011] Furthermore, the first anti-mistake structure and the second anti-mistake structure are concave-convex mating structures extending axially along the first connector and the second connector.

[0012] Furthermore, the concave-convex mating structure includes a foolproof protrusion and a foolproof groove.

[0013] The cross-section of the anti-mistake protrusion is asymmetrical, and the anti-mistake groove has a cross-sectional shape that is completely complementary to the anti-mistake protrusion.

[0014] Furthermore, the cross-sectional shape of the anti-fooling protrusion is one of an asymmetrical right-angled triangle structure, a symmetrical convex rectangle structure, or a symmetrical concave trapezoidal structure.

[0015] Furthermore, there are two of each of the anti-mistake protrusions and anti-mistake grooves.

[0016] The two anti-mistake protrusions are arranged symmetrically at 180° to the central axis of the first connector or the second connector on the outer peripheral wall of the outer adhesive layer, and the two anti-mistake grooves are arranged opposite to the two anti-mistake protrusions.

[0017] Furthermore, the first and second mating parts have a groove-rib fit structure.

[0018] The rib-groove mating structure includes a waterproof rib and a waterproof groove that both extend circumferentially along the first insertion interface and the second insertion interface. The waterproof rib and the waterproof groove form an interference fit when inserted.

[0019] Furthermore, when the waterproof rib and the waterproof groove are inserted, they form a one-sided interference fit with an interference amount of 0.2mm.

[0020] Furthermore, both the first connector and the second connector include metal terminal bodies.

[0021] The metal terminal body has a bonding section wrapped by the outer adhesive layer, and an interlocking structure is provided between the outer peripheral wall of the bonding section and the outer adhesive layer.

[0022] Furthermore, the interlocking structure includes an annular groove and an axial rib.

[0023] The annular groove is provided on the outer peripheral wall of the connecting section.

[0024] The axial rib is located inside the annular groove and its two ends are respectively connected to the two opposite groove walls of the annular groove.

[0025] The outer adhesive layer fills the gap formed by the annular groove and the axial protrusion, so that the outer adhesive layer and the metal terminal body form an integral interlocking structure.

[0026] Furthermore, the metal terminal body includes a conductive segment, the connecting segment, and a wire harness connection segment.

[0027] The conductive segment, the connecting segment, and the wire harness connection segment are arranged sequentially in a direction away from the first plug-in interface and the second plug-in interface, and the end of the wire harness connection segment is provided with a wire harness fixing part for welding wires.

[0028] Beneficial effects: In the foolproof connector structure provided by this invention, a first foolproof structure and a first mating part are provided on the outer peripheral wall of the outer adhesive layer of the first connector, and a second foolproof structure and a second mating part are correspondingly provided on the inner wall of the outer adhesive layer of the second connector, so that the first foolproof structure and the second foolproof structure make priority contact and engagement during the insertion process. When the first connector and the second connector belong to a predetermined matching key position, their shapes are complementary, which can smoothly guide the insertion; when they belong to different key positions, the first foolproof structure and the second foolproof structure will mechanically abut due to the mismatch of their cross-sectional contours, preventing the insertion action from continuing. Thus, at the structural level, physical error prevention function is provided for different functional interfaces, reducing the risk of equipment malfunction caused by misinsertion. At the same time, after insertion, the first mating part and the second mating part cooperate with each other to cover the gap between the first and second insertion interfaces, reducing the entry of external moisture or dust into the connector along the insertion interface. The above-mentioned foolproof structure and mating part are integrally formed by the outer adhesive layer, eliminating the need for additional independent foolproof parts or seals, simplifying the connector structure and assembly process. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the split structure when the first foolproof structure of the foolproof connection terminal structure provided in the embodiment of the present invention is a symmetrical rectangular structure; Figure 2 for Figure 1 A partial sectional view; Figure 3 A schematic diagram of the split structure when the first foolproof structure of the foolproof connection terminal structure provided in the embodiment of the present invention is an asymmetrical right-angled triangular structure; Figure 4 for Figure 3 A partial sectional view.

[0031] icon: 10-Metal terminal; 20-Outer adhesive layer; 100-First connector; 110-First insertion interface; 120-First foolproof structure; 130-First bonding part; 200-Second connector; 210-Second insertion interface; 220-Second foolproof structure; 230-Second bonding part. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0037] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0039] Combination Figure 1 , Figure 2 The foolproof connection terminal structure provided in this embodiment includes a first connector 100 and a second connector 200.

[0040] The first connector 100 can be a male connector, and the second connector 200 can be a female connector. The male and female configurations of the two can also be interchanged according to the actual application scenario. An outer adhesive layer 20 is provided on the outer side of both the first connector 100 and the outer side of the second connector 200. The outer adhesive layer 20 is formed by a two-stage injection molding process. That is, after the metal terminal 10 body is formed, it is placed into another mold and a thermoplastic elastomer or similar insulating adhesive material is injected, so that the outer adhesive layer 20 is tightly bonded to the metal terminal 10 body under high temperature and high pressure.

[0041] In this embodiment, the first connector 100 has a first insertion interface 110 at its end for interlocking with the second connector 200. An outer adhesive layer 20 forms a first anti-misalignment structure 120 and a first contact portion 130 on the outer peripheral wall of the first connector 100. The first anti-misalignment structure 120 and the first contact portion 130 are sequentially arranged in a direction away from the first insertion interface 110. The second connector 200 has a second insertion interface 210 at its end that is adapted to the first insertion interface 110. The outer adhesive layer 20 forms a second anti-misalignment structure 220 and a second contact portion 230 on the inner wall of the second insertion interface 210. The second anti-misalignment structure 220 and the second contact portion 230 are sequentially arranged in a direction away from the second insertion interface 210.

[0042] During the insertion process, the first connector 100 approaches the second connector 200 axially, and the first anti-misalignment structure 120 first contacts the second anti-misalignment structure 220. If the anti-misalignment structures of the first connector 100 and the second connector 200 belong to a predetermined matching key type, their shapes are complementary, and the first anti-misalignment structure 120 can smoothly slide into the second anti-misalignment structure 220, thereby achieving guided insertion and initial positioning. If they belong to different key types, the cross-sectional shapes of the first anti-misalignment structure 120 and the second anti-misalignment structure 220 do not match, and they generate structural abutment at the end faces, forming a mechanical blockage, preventing the user from continuing to apply force for insertion, thereby preventing misinsertion.

[0043] When the anti-foolproof structures of the first connector 100 and the second connector 200 are matched and inserted further, the first mating part 130 gradually approaches the second mating part 230 during the insertion action, and forms a contact engagement with the second mating part 230 when it is fully inserted. The first mating part 130 and the second mating part 230 are tightly fitted together in the inserted state, and the contact surface between them forms a closed interface extending circumferentially along the second connector 200, thereby covering and sealing the assembly gap between the first insertion interface 110 and the second insertion interface 210, preventing external moisture or dust from entering the insertion area along the gap.

[0044] In this embodiment, the first foolproof structure 120 and the first mating part 130 are arranged sequentially along the insertion direction, so that the connector first completes foolproof identification during the insertion action, and then achieves interface sealing. Furthermore, this structural layout can be formed simultaneously in a single injection molding process, reducing the need for independent foolproof parts and independent sealing rings in traditional solutions, thus simplifying material composition and assembly steps. When applied to devices with multiple Type-C interfaces, such as electric-assisted bicycles, manufacturers can select different key positions for foolproof structures for different functional interfaces, making the interfaces physically incompatible, thereby reducing the risk of controller signal malfunction and motor abnormal operation due to mis-insertion.

[0045] In this embodiment, the first anti-mistake structure 120 and the second anti-mistake structure 220 are concave-convex mating structures extending along the axial direction of the first connector 100 and the second connector 200.

[0046] Among them, the first anti-mistake structure 120 and the second anti-mistake structure 220 are respectively in the form of a protrusion and extend in the shape of a strip or rib along the axial direction of the connector, and the other is in the form of a groove and is opened in the same direction.

[0047] During insertion, the protruding portion is embedded in the recessed portion, and the protruding portion and the recessed portion form a sliding fit in the axial direction and achieve constraint in the radial direction. In this structure, the first anti-mistake structure 120 and the second anti-mistake structure 220 utilize the elasticity and shape characteristics of the outer rubber layer 20 material itself to provide a moderate guiding effect during insertion and removal, and also maintain the circumferential relative positional relationship between the first connector 100 and the second connector 200 in the inserted state.

[0048] In this embodiment, the concave-convex mating structure includes a foolproof protrusion and a foolproof groove.

[0049] The cross-section of the anti-mistake protrusion is asymmetrical, and the anti-mistake groove has a cross-sectional shape that is completely complementary to the anti-mistake protrusion.

[0050] In this embodiment, the cross-section of the anti-mistake protrusion is asymmetrical, meaning that the cross-sectional profile of the anti-mistake protrusion is not symmetrical about a straight line passing through the center of the cross-section. Correspondingly, the anti-mistake groove has a cross-sectional shape that is completely complementary to the anti-mistake protrusion.

[0051] Because of its asymmetrical cross-section, when attempting to mate connectors with different key positions, even if the tip of the anti-misalignment protrusion can partially enter the opening area of ​​the anti-misalignment groove, mechanical interference due to line or surface contact will occur on the insertion path caused by the mismatch in cross-sectional contours, preventing further insertion. Only when the anti-misalignment structures of the first connector 100 and the second connector 200 belong to the same key position and their cross-sectional shapes are completely corresponding can the anti-misalignment protrusion slide smoothly along the anti-misalignment groove to the insertion endpoint. In the concave-convex mating structure of this embodiment, both the anti-misalignment protrusion and the anti-misalignment groove are integrally injection molded by the outer adhesive layer 20, achieving the anti-misalignment function without requiring irregular processing of the metal terminal 10 body.

[0052] The cross-sectional shape of the anti-fouling protrusion is one of the following: an asymmetrical right-angled triangle structure, a symmetrical convex rectangle structure, or a symmetrical concave trapezoidal structure.

[0053] In this embodiment, the selection is based on the differentiated requirements of different functional interfaces. Specifically, such as... Figure 3 , Figure 4 In this embodiment, the interface for communication with the battery management system uses an asymmetrical right-angled triangular key structure. For example... Figure 1 , Figure 2 The interface for motor controller signal transmission uses symmetrical convex rectangular keypads, while the interface for instrument display data connection uses symmetrical concave trapezoidal keypads. Because the three cross-sectional shapes do not overlap geometrically, the anti-misalignment protrusion of any keypad cannot enter the anti-misalignment groove of other keys. Even if interfaces with different functions on the same device have similar external dimensions, they cannot be inserted into each other, thus achieving physical error prevention for multiple interfaces in applications such as electric-assisted bicycles.

[0054] In this embodiment, there are two anti-mistake protrusions and two anti-mistake grooves.

[0055] Two anti-mistake protrusions are symmetrically arranged at 180° around the central axis of the first connector 100 or the second connector 200 on the outer peripheral wall of the outer rubber layer 20, and two anti-mistake grooves are arranged opposite to the two anti-mistake protrusions.

[0056] Specifically, in this embodiment, the two anti-mistake protrusions are arranged symmetrically at 180° around the central axis of the first connector 100 on the outer peripheral wall of the outer adhesive layer 20. Correspondingly, the two anti-mistake grooves are arranged symmetrically at 180° around the inner wall of the outer adhesive layer 20, with the central axis of the second connector 200 as the reference, and their positions correspond one-to-one with the two anti-mistake protrusions.

[0057] In this structure, when the first connector 100 is inserted into the second connector 200 at an initial angle, the two anti-misalignment protrusions respectively enter the two anti-misalignment grooves corresponding to their positions. When the first connector 100 is rotated 180° around its own axis and then inserted again, the anti-misalignment protrusion originally located at the top rotates to the bottom, corresponding to the position of the lower anti-misalignment groove, and the anti-misalignment protrusion originally located at the bottom rotates to the top, corresponding to the position of the upper anti-misalignment groove, so it can still be inserted smoothly.

[0058] It should be noted that the first connector 100 and the second connector 200 are the male and female terminals of the Type-C interface, respectively. The arrangement of the two anti-foolproof protrusions and two anti-foolproof grooves in this embodiment not only continues the usage habit of the Type-C interface supporting reversible plugging and unplugging, but also makes different key positions incompatible through the design of a specific cross-sectional shape.

[0059] In this embodiment, the first fitting portion 130 and the second fitting portion 230 are specifically a rib-groove mating structure. The rib-groove mating structure includes a waterproof rib and a waterproof groove. The waterproof rib is disposed on the outer peripheral wall of the outer adhesive layer 20 of the first connector 100, and the waterproof groove is disposed on the inner wall of the outer adhesive layer 20 of the second connector 200. Both the waterproof rib and the waterproof groove extend circumferentially along the first insertion interface 110 and the second insertion interface 210, that is, they are arranged continuously or intermittently in a ring or approximately ring shape around the circumference of the first connector 100 and the second connector 200.

[0060] In the mating state, the waterproof rib is embedded in the waterproof groove, forming an interference fit between the rib and the groove. Because the outer rubber layer 20 is made of an insulating material with a certain degree of compressive resilience, the waterproof rib undergoes elastic deformation under the pressure of the groove wall when embedded. The rebound force generated within the material maintains a certain contact pressure between the outer surface of the waterproof rib and the inner wall of the waterproof groove, thereby forming one or more sealing barriers circumferentially at the mating interface. This sealing barrier prevents external moisture or dust from diffusing into the connector along the mating gap.

[0061] In this embodiment, the waterproof rib and the waterproof groove form a one-sided interference fit when they are inserted, and the interference amount is 0.2mm.

[0062] Specifically, in this embodiment, the waterproof rib and the waterproof groove form a one-sided interference fit when they are inserted, that is, interference compression occurs between one side surface of the waterproof rib and the corresponding side wall of the waterproof groove, while the other side can have an assembly allowance gap, and the one-sided interference amount is designed to be 0.2mm.

[0063] The selection of the interference amount for unilateral mating needs to balance sealing reliability and insertion / removal operability. An interference amount of 0.2mm provides the contact pressure required for sealing without causing the insertion / removal resistance to exceed a reasonable range. After multiple sealing tests, this structure ensures that the first connector 100 and the second connector 200 meet the IPX7 waterproof rating requirements after mating, maintaining internal dryness under certain water depth and time conditions. This is suitable for the use of electric-assisted bicycles in rainy or wading scenarios.

[0064] In this embodiment, both the first connector 100 and the second connector 200 include a metal terminal 10 body. The metal terminal 10 body is the conductive core component of the connector, used to realize the transmission of current or electrical signals, and its material can be selected from metal materials with good conductivity and certain mechanical strength, such as phosphor bronze and brass.

[0065] The metal terminal 10 body has a bonding section wrapped by an outer adhesive layer 20, the bonding section corresponding to the area covered by adhesive material during secondary injection molding. In this embodiment, an interlocking structure is provided between the outer peripheral wall of the bonding section and the outer adhesive layer 20.

[0066] During the secondary injection molding process, the molten overmolded material flows into the gaps or recesses formed by the interlocking structure under injection pressure. After the material cools and solidifies, these filled gaps and recesses can form mechanical interlocking points, so that the bond between the outer overmolded layer 20 and the metal terminal 10 body not only relies on the adhesion between the materials, but also increases the interlocking relationship in the structure, thereby improving the anti-loosening performance of the metal terminal 10 and the outer overmolded layer 20 when subjected to axial tensile force or circumferential torque.

[0067] In this embodiment, the interlocking structure specifically includes an annular groove and an axial rib. The annular groove is formed along the circumference of the interlocking section on the outer peripheral wall of the metal terminal 10 body, and the cross-section of the annular groove can be rectangular, trapezoidal, or arc-shaped. The axial rib is provided on the bottom surface of the annular groove, and the two ends of the axial rib are respectively connected to the two opposite groove walls of the annular groove, thereby dividing the annular groove into several independent filling units along the circumference.

[0068] During the secondary injection molding process, the material of the outer coating layer 20 permeates and fills the gaps formed by the annular groove and the axial rib under the pressure of the mold cavity. After the material cures, the material filling the annular groove forms an annular retaining ring around the joint section, which acts as a stop in the axial direction for the outer coating layer 20, restricting the relative axial displacement between the two. At the same time, the material filling on both sides of the axial rib forms circumferentially distributed limiting blocks, which abut against the sidewalls of the axial rib, restricting the circumferential rotation of the outer coating layer 20 relative to the metal terminal 10 body.

[0069] In this embodiment, the composite structure of the annular groove and the axial rib achieves an integrated interlock between the outer adhesive layer 20 and the metal terminal 10 body. Tensile testing verifies that this mechanical interlock structure enables the axial bonding force between the outer adhesive layer 20 and the metal terminal 10 body to reach more than 80N. Compared with the simple wrapping structure that relies solely on material adhesion, the bonding strength is improved.

[0070] In terms of manufacturing process, secondary injection molding is suitable for mass production. Compared with the error-proof structure solution for irregularly shaped metals that requires precision machining, secondary injection molding has a faster production cycle, increasing output per unit time by about 50% and reducing the manufacturing cost per unit by about 30%. At the same time, because the injection molding process is stable and controllable, the product molding yield can reach over 98%.

[0071] Regarding waterproof performance, since the outer adhesive layer 20 is made of an elastic insulating material, when the first connector 100 and the second connector 200 are inserted into place, an interference fit is formed between the waterproof rib and the waterproof groove. The outer adhesive material adheres to each other under compression, forming a continuous seal in the circumferential direction of the insertion interface. Waterproof rating testing shows that the foolproof connection terminal structure provided in this embodiment meets the IPX7 waterproof rating requirement in the inserted state, meaning that no water ingress occurs inside the connector under specified water depth and immersion time conditions.

[0072] In this embodiment, the metal terminal 10 body includes a conductive segment, a connecting segment, and a wire harness connection segment.

[0073] The conductive section, the connecting section, and the wire harness connection section are arranged sequentially in a direction away from the first plug interface 110 and the second plug interface 210. The end of the wire harness connection section is provided with a wire harness fixing part for welding wires.

[0074] Specifically, in this embodiment, the conductive segment is located at the front end of the metal terminal 10 body, so as to contact the corresponding conductive terminal in the adapter connector in the mating state, forming a transmission path for electrical signals or current. The bonding segment is located in the middle of the metal terminal 10 body, corresponding to the coverage area of ​​the outer adhesive layer 20. The wire harness connection segment is located at the rear end of the metal terminal 10 body.

[0075] The conductive section, the connecting section, and the wire harness connection section are arranged sequentially in a direction away from the first plug-in interface 110 or the second plug-in interface 210. At the end of the wire harness connection section, there is a wire harness fixing part, which is a welded terminal integrally stamped with the metal terminal 10 body. It is a flat plate or a support structure with a concave arc, used to fix the core wire of the conductor by means of soldering or resistance welding, and to realize the electrical conduction between the conductor and the metal terminal 10 body.

[0076] In this embodiment, after the wire welding is completed, an external injection-molded tail sheath or a heat-shrink tubing is applied to protect the welding point area and provide mechanical protection against bending and pulling of the wire harness.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A foolproof connection terminal structure, characterized in that, include: First connector (100) and second connector (200); An outer adhesive layer (20) is provided on the outer side of both the first connector (100) and the second connector (200); The first connector (100) has a first insertion interface (110) at its end. The outer adhesive layer (20) forms a first anti-foolproof structure (120) and a first fitting part (130) on the outer peripheral wall of the first connector (100). The first anti-foolproof structure (120) and the first fitting part (130) are arranged sequentially in a direction away from the first insertion interface (110). The end of the second connector (200) is formed with a second plug-in interface (210) that is adapted to the first plug-in interface (110). The outer adhesive layer (20) forms a second anti-foolproof structure (220) and a second fitting part (230) on the inner wall of the second plug-in interface (210). The second anti-foolproof structure (220) and the second fitting part (230) are arranged sequentially in a direction away from the second plug-in interface (210). When the first connector (100) is inserted into the second connector (200), the first anti-foolproof structure (120) cooperates with the second anti-foolproof structure (220), and the first fitting part (130) cooperates with the second fitting part (230) to close the gap between the first insertion interface (110) and the second insertion interface (210).

2. The foolproof connection terminal structure according to claim 1, characterized in that, The first anti-foolproof structure (120) and the second anti-foolproof structure (220) are concave-convex mating structures extending along the axial direction of the first connector (100) and the second connector (200).

3. The foolproof connection terminal structure according to claim 2, characterized in that, The concave-convex mating structure includes a foolproof protrusion and a foolproof groove; The cross-section of the anti-mistake protrusion is asymmetrical, and the anti-mistake groove has a cross-sectional shape that is completely complementary to the anti-mistake protrusion.

4. The foolproof connection terminal structure according to claim 3, characterized in that, The cross-sectional shape of the anti-foolproof protrusion is one of an asymmetrical right-angled triangle structure, a symmetrical convex rectangle structure, or a symmetrical concave trapezoidal structure.

5. The foolproof connection terminal structure according to claim 3, characterized in that, There are two of each of the anti-mistake protrusions and anti-mistake grooves; The two anti-mistake protrusions are arranged symmetrically at 180° to the outer peripheral wall of the outer adhesive layer (20) with respect to the central axis of the first connector (100) or the second connector (200), and the two anti-mistake grooves are arranged opposite to the two anti-mistake protrusions.

6. The foolproof connection terminal structure according to claim 1, characterized in that, The first fitting part (130) and the second fitting part (230) are a rib groove fit structure; The rib-groove mating structure includes a waterproof rib and a waterproof groove that both extend circumferentially along the first insertion interface (110) and the second insertion interface (210), and the waterproof rib and the waterproof groove form an interference fit when inserted.

7. The foolproof connection terminal structure according to claim 6, characterized in that, When the waterproof rib and the waterproof groove are inserted, they form a one-sided interference fit with an interference amount of 0.2mm.

8. The foolproof connection terminal structure according to claim 1, characterized in that, Both the first connector (100) and the second connector (200) include a metal terminal (10) body; The metal terminal (10) body has a bonding section wrapped by the outer adhesive layer (20), and an interlocking structure is provided between the outer peripheral wall of the bonding section and the outer adhesive layer (20).

9. The foolproof connection terminal structure according to claim 8, characterized in that, The interlocking structure includes an annular groove and an axial rib. The annular groove is provided on the outer peripheral wall of the connecting section; The axial rib is provided in the annular groove and its two ends are respectively connected to the two opposite groove walls of the annular groove; The outer adhesive layer (20) fills the gap formed by the annular groove and the axial protrusion, so that the outer adhesive layer (20) and the metal terminal (10) body form an integral interlocking structure.

10. The foolproof connection terminal structure according to claim 9, characterized in that, The metal terminal (10) body includes a conductive segment, the connecting segment, and a wire harness connection segment; The conductive segment, the connecting segment, and the wire harness connecting segment are arranged sequentially in a direction away from the first plug interface (110) and the second plug interface (210), and the end of the wire harness connecting segment is provided with a wire harness fixing part for welding wires.

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