A double-layer DC plug-in connecting line with buffer protection and concentricity limitation

Abstract

The utility model provides a kind of double DC plug-in connection line with buffer protection and concentricity limit, including plug-in male head, plug-in female head and wiring, the plug-in male head has copper needle with one side wiring electrically conductive, the plug-in female head has with copper needle cooperation and with the other side wiring conduction slot, it is characterized in that, the plug-in male head and plug-in female head all include: hard inner core, by one injection molding;Soft shell, by secondary injection molding in hard inner core outside;Wherein, the hard inner core and wiring and copper needle or wiring and slot are integrally formed.The utility model forms the double-layer structure of different internal and external hardness with twice injection molding, ensure structure rigidity and copper needle concentricity by hard inner core, and provide buffer protection, comfortable touch and convenient assembly by soft shell, rigidly combined to improve product comprehensive performance.

Description

Technical Field

[0001] This utility model relates to the technical field of DC plugs, and in particular to a double-layer DC plug-in cable that combines buffer protection and concentricity limitation. Background Technology

[0002] In the field of power connection for electronic devices, one-piece injection molded DC plugs are widely used in consumer electronics, smart home and other products due to their advantages such as compact structure and controllable cost.

[0003] DC plugs generally include a male connector and a female connector. By designing several copper pins on the male connector and a corresponding slot on the female connector, male and female can be plugged in.

[0004] However, the one-piece injection-molded DC connector in the existing technology still has certain drawbacks:

[0005] Firstly, in terms of the selection of rubber materials for the existing DC plug integral injection molding, if a rubber material with higher hardness is used, although it can reduce the risk of misalignment between the injection head and the copper pin, the outer structure of the plug lacks buffering capacity and is easily deformed under external force. After long-term stretching, the rebound efficiency is poor, and the texture is not good when in contact with the skin, which is not conducive to assembly operations. If a rubber material with lower hardness is used, although the above-mentioned buffering, feel and assembly problems can be improved, it will greatly increase the risk of misalignment between the injection head and the copper pin, affecting product quality and performance.

[0006] Secondly, in terms of foolproof structural design, the commonly used acute-angle triangular structure, groove structure, and symmetrical copper pin and copper tube structure of the plug have obvious shortcomings. These structures lack effective guiding function, and the assembly direction is difficult to identify quickly. In particular, the symmetrical copper pin structure is prone to errors when the male and female plugs are inserted, which are not easy to detect. This not only seriously reduces assembly efficiency, but may also lead to a decrease in circuit conductivity and cause equipment failure.

[0007] In view of this, the inventors have specifically designed a double-layer DC plug-in connector that combines buffer protection and concentricity limitation, and this invention is thus derived. Utility Model Content

[0008] To solve the above problems, the technical solution of this utility model is as follows:

[0009] A double-layer DC plug-in connector cable with both buffer protection and concentricity limitation includes a male plug, a female plug, and wiring. The male plug has a copper pin electrically connected to the wiring on one side, and the female plug has a slot that mates with the copper pin and is connected to the wiring on the other side. Both the male and female plugs include:

[0010] Rigid inner core, formed through a single injection molding process;

[0011] The soft outer shell is formed on the outside of the rigid inner core through secondary injection molding;

[0012] The rigid inner core is integrally formed with the wiring and copper pin or the wiring and slot.

[0013] Preferably, the hardness of the adhesive material in the rigid inner core is greater than that in the soft outer shell.

[0014] Preferably, the rigid inner core of the male connector is cylindrical, the copper pin is integrally injection molded on one side of the rigid inner core, the inner core wire of the connector is connected to the copper pin and integrally injection molded on the inner side of the rigid inner core, and the soft outer shell of the male connector includes a first covering section for covering the rigid inner core, a first protective section disposed at one end of the first covering section and distributed around the copper pin, and a first connecting section disposed at the other end of the first covering section for covering the outer shell of the connector, and the inner side of the first protective section forms a mating groove with an opening.

[0015] Preferably, the rigid inner core of the female connector is cylindrical, and one side of the female connector integrally protrudes to form a mating portion that fits into the mating groove. The slot is recessed inward along the end face of the mating portion away from the rigid inner core. The soft outer shell of the female connector includes a second covering section for covering the rigid inner core, a second protective section surrounding the outside of the mating portion and for fitting the first protective section, and a second connecting section located at the other end of the second covering section for covering the wiring shell.

[0016] Preferably, the outer periphery of the docking portion is recessed inward along its radial direction to form a positioning groove, and the inner sidewall of the docking groove protrudes in its radial direction to form a positioning portion that fits into the positioning groove.

[0017] Preferably, the outer periphery of the rigid inner core is provided with a plurality of annular and parallel anti-detachment grooves.

[0018] Preferably, the outer periphery of the soft outer shell is provided with friction textures to increase friction.

[0019] Preferably, the rigid inner core of the female connector is recessed radially inward to form a mis-proof groove with a triangular cross-section, and the corresponding position of the male connector protrudes to form a mis-proof structure that positions and cooperates with the mis-proof groove.

[0020] Preferably, the triangle corresponding to the error-proof groove and error-proof structure is an obtuse triangle.

[0021] Preferably, the triangle corresponding to the error-proof groove and error-proof structure is an irregular triangle.

[0022] The beneficial effects of this utility model are as follows:

[0023] This invention uses two injection molding processes to form a double-layer structure with different hardness inside and out. The rigid inner core ensures structural rigidity and concentricity with the copper needles, while the soft outer shell provides cushioning protection, a comfortable touch, and convenient assembly. The combination of rigidity and flexibility enhances the overall performance of the product.

[0024] In addition, the obtuse-angled or irregular triangular error-proof structure enables rapid orientation recognition and precise assembly, avoiding misinsertion and significantly improving production efficiency and assembly accuracy.

[0025] In particular, by setting an annular anti-detachment groove on the outer periphery of the rigid inner core, the connection strength between the soft outer shell and the rigid inner core and the axial anti-detachment performance can be enhanced when the soft outer shell is formed, thereby further improving the structural strength of the male and female connectors. Attached Figure Description

[0026] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0027] in:

[0028] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model;

[0029] Figure 2 This is a partial exploded view of the male connector in Embodiment 1 of this utility model;

[0030] Figure 3 This is a top view of the male connector in Embodiment 1 of this utility model;

[0031] Figure 4 This is a partial structural diagram of the female connector in Embodiment 1 of this utility model;

[0032] Figure 5 This is a partial exploded view of the female connector in Embodiment 1 of this utility model;

[0033] Figure 6 This is a top view of the female connector in Embodiment 1 of this utility model;

[0034] Figure 7 This is one of the structural schematic diagrams of the female connector in Embodiment 2 of this utility model;

[0035] Figure 8 This is the second schematic diagram of the structure of the female connector in Embodiment 2 of this utility model;

[0036] Figure 9 This is a top view of the female connector in Embodiment 2 of this utility model;

[0037] Figure 10 This is a top view of the male connector in Embodiment 2 of this utility model.

[0038] Label Explanation:

[0039] 100. Male connector; 110. Copper pin; 200. Female connector; 210. Slot; 211. Guide surface; 300. Wiring; 400. Rigid inner core; 410. Connecting part; 411. Positioning groove; 412. Foolproof groove; 500. Soft outer shell; 510. First covering section; 520. First protective section; 521. Connecting groove; 522. Positioning part; 523. Foolproof structure; 530. First connecting section; 540. Second covering section; 550. Second protective section; 551. Accommodating space; 560. Second connecting section; 600. Friction pattern; 610. Indicator mark. Detailed Implementation

[0040] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model. Example 1

[0041] Please see Figures 1 to 6 This is a double-layer DC plug-in connector cable that combines buffer protection and concentricity limitation, which is the preferred embodiment of the present utility model. It includes a male plug 100, a female plug 200, and a connector 300. The male plug 100 has a copper pin 110 that is electrically connected to the connector 300 on one side. The female plug 200 has a slot 210 that mates with the copper pin 110 and is connected to the connector 300 on the other side.

[0042] Specifically, in this embodiment, the structures of the male connector 100 and the female connector 200 are as follows:

[0043] The male connector 100 and the female connector 200 are formed in the same way, and both include the following structural parts:

[0044] First, a hard inner core 400 with a relatively hard texture is formed through a single injection molding process.

[0045] Among them, such as Figure 2 , 3 As shown, the rigid inner core 400 of the male connector 100 is cylindrical, and the copper pin 110 is integrally injection molded on one side of the rigid inner core 400. The inner core wire of the connector 300 is connected to the copper pin 110 and integrally injection molded on the inner side of the rigid inner core 400 (not shown in the figure).

[0046] Thus, by means of the above method, the copper needle 110 and the wiring 300 are integrally injection molded on the inner side of the rigid inner core 400, and the concentricity of the copper needle 110 is maintained by utilizing the hardness of the rigid inner core 400.

[0047] In this embodiment, there are 3 copper needles 110, which are evenly distributed around the central axis of the rigid inner core 400, and the included angle between the copper needles 110 is 120°.

[0048] like Figure 5 , 6 As shown, the rigid inner core 400 of the female connector 200 is cylindrical, and a cylindrical mating portion 410 is integrally formed on one side of the female connector 200. The slot 210 is recessed inward along the end face of the mating portion 410 away from the rigid inner core 400. The inner core wire of the wiring 300 is connected to the contact point on the inner side of the slot 210 and integrally injection molded on the inner side of the rigid inner core 400 (not shown in the figure).

[0049] In this embodiment, the outer diameter of the rigid inner core 400 and the mating part 410 of the female connector 200 is the same as that of the rigid inner core 400 of the male connector 100. There are three slots 210, which are positioned one-to-one with the copper pins 110. A guide surface 211 is also designed at the opening of the slot 210. The guide surface 211 is inclined and is used to guide the copper pins 110 into the slot 210.

[0050] Secondly, through secondary injection molding, a soft outer shell 500 with a relatively hard texture is formed on the outside of the hard inner core 400.

[0051] Among them, such as Figure 2 , 3 As shown, the soft outer shell 500 of the male connector 100 includes a first covering section 510 for covering the hard inner core 400, a first protective section 520 disposed at one end of the first covering section 510 and distributed around the copper pin 110, and a first connecting section 530 disposed at the other end of the first covering section 510 for covering the outer shell of the wiring 300. The inner side of the first protective section 520 forms a mating groove 521 with an opening.

[0052] Thus, a soft outer shell 500 with a relatively soft texture is formed on the outside of the rigid inner core 400, so that a soft and flexible protective layer is formed on the outside of the male connector 100 and the female connector 200. While maintaining the concentricity of the copper pins 110, it also has the functions of buffer protection, comfortable touch and convenient assembly.

[0053] In addition, such as Figure 4 , 5As shown in Figure 6, the mating portion 410 at the end of the rigid inner core 400 of the female connector 200 is fitted with the mating groove 521 of the male connector 100. The soft outer shell 500 of the female connector 200 includes a second covering section 540 for covering the rigid inner core 400, a second protective section 550 surrounding the outside of the mating portion 410 and for fitting the first protective section 520, and a second connecting section 560 located at the other end of the second covering section 540 for covering the outer shell of the wiring 300.

[0054] The second covering section 540 and the docking part 410 are concentrically arranged, and the two enclose each other to form an annular placement space 551 with an opening on one side. The spacing of the annular placement space 551 is exactly adapted to the thickness of the first protective section 520, so that when the female connector 200 and the male connector 100 are inserted, the first protective section 520 is precisely embedded in the placement space 551 to complete the insertion process.

[0055] In particular, such as Figure 3 , 6 As shown, the outer periphery of the docking part 410 is recessed inward along its radial direction to form a positioning groove 411, and the inner sidewall of the docking groove 521 protrudes in its radial direction to form a positioning part 522 that fits into the positioning groove 411.

[0056] Thus, through the positioning cooperation between the positioning groove 411 and the positioning part 522, users can easily identify the positions of the male connector 100 and the female connector 200, which facilitates the improvement of the insertion speed and accuracy.

[0057] like Figure 2 , 5 As shown, the outer periphery of the rigid inner core 400 is provided with several annular anti-detachment grooves that are arranged vertically and parallel to each other. In this embodiment, there are two anti-detachment grooves. Thus, by providing annular anti-detachment grooves on the outer periphery of the rigid inner core 400, when forming the soft outer shell 500, an anti-detachment structure (not shown in the figure) that fits into the shape of the anti-detachment groove can be integrally formed in the anti-detachment groove. The anti-detachment structure can enhance the connection strength and axial anti-detachment performance between the soft outer shell 500 and the rigid inner core 400, and further improve the structural strength of the male connector 100 and the female connector 200.

[0058] like Figure 4 As shown, the outer periphery of the soft shell 500 is provided with friction textures 600 to increase friction. The friction textures 600 are continuously distributed wave-shaped protrusions and are integrally injection molded with the soft shell 500. Through the friction textures 600, the friction between the user's hand and the female connector 200 can be further enhanced, thereby improving the tactile feel of the male connector 100 and the female connector 200 during the insertion process.

[0059] In addition, combined Figure 2 , 5An indicator mark 610 for indicating the insertion direction is also provided on the outside of the soft shell 500. The indicator mark 610 is also integrally injection molded and is arrow-shaped.

[0060] In particular, the hardness of the rubber material in the rigid inner core 400 is greater than that in the soft outer shell 500.

[0061] In this embodiment, the rigid inner core 400 can be made of engineering plastics with a harder texture, such as nylon or PBT, to ensure structural rigidity, while the soft outer shell 500 can be made of elastomers such as TPE or silicone, which are soft and elastic.

[0062] The rigid inner core 400 is integrally molded with the copper pin 110, slot 210, and wiring 300. High-precision injection molding ensures the concentricity of the copper pin 110 and the inner core, avoiding the risk of eccentricity and improving conductivity stability. At the same time, an internal support frame is provided to prevent the plug from deforming due to external forces, making it especially suitable for scenarios that require frequent plugging and unplugging.

[0063] The soft outer shell 500 encases the rigid inner core 400, absorbing the impact during plugging and unplugging and reducing plug wear; it also exhibits excellent resilience after long-term stretching, making it less prone to breakage. Optimized tactile feel: The soft material enhances grip comfort, avoiding the "gritty" feel of traditional hard plastic, making it especially suitable for home or handheld devices. Assembly assistance: The elasticity of the soft outer shell 500 can compensate for certain tolerances, reducing assembly difficulty and improving production efficiency.

[0064] In particular, the number of copper pins 110 and slots 210 can also be reasonably expanded to 4, 5, 6 or other numbers, without limitation here. Example 2

[0065] Please see Figures 7 to 10 This is a double-layer DC plug-in connector cable with buffer protection and concentricity limitation as an embodiment 2 of the present utility model. The difference from embodiment 1 is that in this embodiment, the second protective section 550 is not surrounded on the outside of the mating part 410 of the female connector 200, and the mating part 410 of the female connector 200 is recessed inward along its radial direction to form a mis-proof groove 412 with a triangular cross section. The inner sidewall of the mating groove 521 formed by the inner side of the first protective section 520 of the male connector 100 protrudes accordingly to form a mis-proof structure 523 that is positioned and matched with the mis-proof groove 412.

[0066] Furthermore, in this embodiment, the triangles corresponding to the anti-mistake groove 412 and the anti-mistake structure 523 are obtuse triangles.

[0067] Preferably, the triangles corresponding to the error-proof groove 412 and the error-proof structure 523 are irregular triangles.

[0068] Specifically, the anti-mistake groove 412 is formed by two intersecting joint surfaces. When the two joint surfaces are cut by the same plane, the lengths of their cut lines are a1 and a2, respectively, where a1 ≠ a2. This, combined with the condition of an obtuse angle, makes the triangular structure corresponding to the anti-mistake groove 412 form an irregular triangle. The shape of the anti-mistake structure 523 is adapted to the anti-mistake groove 412.

[0069] In particular, in this embodiment, the distribution of the three copper pins 110 is also uneven, and the included angles between them are not equal. Through the irregular distribution of the copper pins 110 and the foolproof structure 523, users can achieve rapid orientation recognition and accurate assembly, realize double foolproofing, avoid misinsertion, and greatly improve production efficiency and assembly accuracy.

[0070] The beneficial effects of this utility model are as follows:

[0071] This utility model uses two injection molding processes to form a double-layer structure with different hardness inside and outside. The rigid inner core 400 ensures the structural rigidity and concentricity with the copper needle 110, while the soft outer shell 500 provides cushioning protection, a comfortable touch and convenient assembly. The combination of rigidity and flexibility improves the overall performance of the product.

[0072] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A double-layer DC plug-in connector cable with both buffer protection and concentricity limitation, comprising a male plug (100), a female plug (200), and a connector (300), wherein the male plug (100) has a copper pin (110) electrically connected to one side of the connector (300), and the female plug (200) has a slot (210) that mates with the copper pin (110) and is connected to the other side of the connector (300), characterized in that, Both the male connector (100) and the female connector (200) include: The rigid inner core (400) is formed by one-time injection molding; The soft outer shell (500) is formed on the outside of the hard inner core (400) by secondary injection molding; The rigid inner core (400) is integrally formed with the wiring (300) and copper pin (110) or the wiring (300) and slot (210).

2. A double-layer DC plug-in connector with both buffer protection and concentricity limitation as described in claim 1, characterized in that, The hardness of the adhesive material in the rigid inner core (400) is greater than that in the soft outer shell (500).

3. A double-layer DC plug-in connector with both buffer protection and concentricity limitation as described in claim 1, characterized in that, The rigid inner core (400) of the male connector (100) is cylindrical. The copper pin (110) is integrally injection molded on one side of the rigid inner core (400). The inner core wire of the connector (300) is connected to the copper pin (110) and integrally injection molded on the inner side of the rigid inner core (400). The soft outer shell (500) of the male connector (100) includes a first covering section (510) for covering the rigid inner core (400), a first protective section (520) provided at one end of the first covering section (510) and distributed around the copper pin (110), and a first connecting section (530) provided at the other end of the first covering section (510) for covering the outer shell of the connector (300). The inner side of the first protective section (520) forms a mating groove (521) with an opening.

4. A double-layer DC plug-in connector with both buffer protection and concentricity limitation as described in claim 3, characterized in that, The rigid inner core (400) of the female connector (200) is cylindrical. One side of the female connector (200) integrally protrudes to form a mating portion (410) that fits into the mating groove (521). The slot (210) is recessed inward along the end face of the mating portion (410) away from the rigid inner core (400). The soft outer shell (500) of the female connector (200) includes a second covering section (540) for covering the rigid inner core (400), a second protective section (550) surrounding the outside of the mating portion (410) and for fitting the first protective section (520), and a second connecting section (560) located at the other end of the second covering section (540) for covering the outer shell of the wiring (300).

5. A double-layer DC plug-in connector with both buffer protection and concentricity limitation as described in claim 4, characterized in that, The outer periphery of the docking part (410) is recessed inward along its radial direction to form a positioning groove (411), and the inner sidewall of the docking groove (521) protrudes inward along its radial direction to form a positioning part (522) that fits into the positioning groove (411).

6. A double-layer DC plug-in connector with both buffer protection and concentricity limitation as described in claim 1, characterized in that, The outer periphery of the rigid inner core (400) is provided with several annular anti-detachment grooves that are distributed vertically and horizontally.

7. A double-layer DC plug-in connector with both buffer protection and concentricity limitation as described in claim 1, characterized in that, The outer periphery of the soft outer shell (500) is provided with friction textures to increase friction.

8. A double-layer DC plug-in connector with both buffer protection and concentricity limitation as described in claim 1, characterized in that, The rigid inner core (400) of the female connector (200) is recessed inward along its radial direction to form a mis-proof groove (412) with a triangular cross section, and the corresponding position of the male connector (100) protrudes to form a mis-proof structure (523) that is positioned and matched with the mis-proof groove (412).

9. A double-layer DC plug-in connector with both buffer protection and concentricity limitation as described in claim 8, characterized in that, The triangles corresponding to the anti-mistake groove (412) and the anti-mistake structure (523) are obtuse triangles.

10. A double-layer DC plug-in connector with both buffer protection and concentricity limitation as described in claim 8, characterized in that, The triangles corresponding to the anti-mistake groove (412) and the anti-mistake structure (523) are irregular triangles.

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