A rivet type DC plug

Abstract

The utility model discloses a riveting formula DC plug, including male terminal and detachable connection on male terminal female terminal, and female terminal includes: first metal pipe, and the outside end portion annularly equipped with contact piece, and the one side of contact piece extends and forms first riveting piece, and first metal pipe inlayed is equipped with first insulating part, and first insulating part is assembled with annular part, and the one side of annular part extends and forms second riveting piece, and first insulating part will contact piece and annular part be isolated each other, for blocking both formation electric connection, realizes circuit insulation. Through with the contact piece is locally around and is equipped with the outside end portion of first metal pipe, make contact piece and the contact area of first metal pipe promote 3 5 times, significantly promote current carrying capacity, can adapt to 10A and above big current application scene, through the improvement to female terminal, need not rely on the expensive automatic terminal equipment, reduced the production cost of enterprise, saved the cutting step, simplified the whole assembly process, improved production efficiency, also avoided the waste of parts.

Description

Technical Field

[0001] This utility model relates to the field of DC plug technology, and in particular to a crimped DC plug. Background Technology

[0002] In the field of DC plugs (direct current power plugs), in order to improve the connection reliability and current transmission of DC plugs, it is necessary to rationally design the contact structure of conductive components. For example, patent application CN201410027708.6 discloses an automated terminald DC plug and DC plug cable. The metal contact includes a transverse connecting piece, on which two connecting pieces are arranged vertically to the same side. The end of one connecting piece is provided with a semi-annular contact piece for connecting to a metal conduit, and the end of the other connecting piece is provided with an inner spring contact piece. The semi-annular contact piece is arranged in a shape that surrounds the inner spring contact piece. The connecting piece is provided with a wire riveting position near the transverse connecting piece. The transverse connecting piece of the metal contact of the automated terminald DC plug is formed as a whole connecting piece, and the wire terminal connection needs to be achieved by an automatic terminald machine, and the transverse connecting piece needs to be cut off.

[0003] However, the above-mentioned DC plugs have the following shortcomings: First, they require expensive automatic terminal cutting equipment, which makes them costly for small and medium-sized production enterprises; Second, the semi-circular contact piece and the metal conduit only have partial contact on the inner side, resulting in a small contact area, making it difficult to adapt to high-current (such as 10A and above) application scenarios; Third, the structure is redundant and the processing is cumbersome, and the horizontal connecting pieces need to be cut off laterally, which increases the processing steps, reduces production efficiency, and causes waste of parts. Utility Model Content

[0004] The purpose of this invention is to provide a crimped DC plug, which partially solves or alleviates the above-mentioned deficiencies in the prior art.

[0005] To solve the aforementioned technical problems, the present invention specifically adopts the following technical solution: A crimped DC plug, characterized in that it comprises: Male terminal; and A female terminal detachably connected to the male terminal, the female terminal comprising: A first metal tube has a contact piece circumferentially arranged at its outer end. One side of the contact piece extends to form a first rivet piece. A first insulating element is embedded in the first metal tube. An annular element is assembled inside the first insulating element. One side of the annular element extends to form a second rivet piece. The first insulating element isolates the contact piece from the annular element, thereby preventing them from forming an electrical connection and achieving circuit insulation.

[0006] In some embodiments, one end of the first insulating member protrudes from the first metal tube, and one end face of the contact piece is flush with the end face of the portion of the first insulating member protruding from the first metal tube.

[0007] In some embodiments, the contact length between the contact piece and the outer end of the first metal tube is ≥6mm to improve the current carrying capacity and adapt to high current application scenarios.

[0008] In some embodiments, the second rivet piece is adjacent to and below the first rivet piece, and the two are arranged in a compact manner to save space, for the purpose of achieving one-time riveting.

[0009] In some embodiments, the male terminal includes a second metal tube, a third rivet piece disposed at one end of the second metal tube, a second insulating member embedded inside the second metal tube, and a fourth rivet piece disposed inside the second insulating member. The second insulating member isolates the third rivet piece from the fourth rivet piece to prevent them from forming an electrical connection.

[0010] In some embodiments, the second metal tube is provided with a thread on the outside, a locking cap is rotatably connected to the first metal tube, and a stop plate is fixedly disposed on the outside of the first metal tube. After the first metal tube is inserted into the second metal tube, the locking cap is screwed onto the thread and abuts against the stop plate to achieve locking and fixing of the female terminal and the male terminal. The stop plate is used to limit the maximum tightening position of the locking cap.

[0011] In some embodiments, the axial clearance between the locking cap and the first metal tube is 0.1 mm, the thickness of the contact piece is 0.15 mm, and the contact piece and the stop piece together form a limiting structure to prevent the locking cap from detaching from the first metal tube.

[0012] In some embodiments, any one of the first riveting piece, the second riveting piece, and the third riveting piece has a U-shaped opening.

[0013] In some embodiments, both the first insulating element and the second insulating element are made of PBT.

[0014] In some embodiments, the first metal tube and / or the second metal tube are made of nickel-plated brass.

[0015] The beneficial effects of this utility model are as follows: By partially surrounding the outer end of the first metal tube with a surrounding angle of ≥180°, compared to the structure of "semi-circular contact piece partially contacting the inner side of the metal tube" in the DC plug of the prior art, this outer surrounding arrangement increases the contact area between the contact piece and the first metal tube by 3-5 times, significantly improving the current carrying capacity and making it suitable for high current applications of 10A and above.

[0016] The wires can be tightly fixed within the rivet plate using a simple fixture, eliminating the need for expensive automatic crimping equipment, thus reducing production costs for enterprises. The operation is convenient, and the connection strength between the wires and the rivet plate after crimping is high and the contact is stable. Furthermore, by simplifying the structure of the female terminal, eliminating the need for cutting steps, the overall assembly process is streamlined, production efficiency is improved, and waste of parts is avoided. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the female terminal provided in some embodiments of the present invention.

[0018] Figure 2 This is a partial three-dimensional structural diagram of the female terminal provided in some embodiments of the present invention.

[0019] Figure 3 This is a partial exploded view of the female terminal provided for some embodiments of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the male terminal provided in some embodiments of the present invention.

[0021] Figure 5 This is a schematic diagram of the planar structure of the female terminal provided in some embodiments of the present invention.

[0022] Figure 6 This is a schematic diagram of the planar structure of the male terminal provided in some embodiments of the present invention.

[0023] The component names and serial numbers in the diagram are as follows: 1_Female terminal, 11_First metal tube, 12_Contact piece, 13_First riveting piece, 14_First insulating component, 15_Ring piece, 16_Second riveting piece, 2_Male terminal, 21_Second metal tube, 22_Third riveting piece, 23_Second insulating component, 24_Fourth riveting piece, 31_Thread, 32_Locking cap, 33_Stop piece. Detailed Implementation

[0024] The preferred technical solution of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] like Figures 1 to 6The present invention discloses a crimped DC plug, including a male terminal 2 and a female terminal 1 detachably connected to the male terminal 2. The female terminal 1 includes a first metal tube 11, with a contact piece 12 circumferentially arranged at the outer end of the first metal tube 11. A first riveting piece 13 extends from one side of the contact piece 12. A first insulating member 14 is embedded in the first metal tube 11. An annular member 15 is assembled inside the first insulating member 14. A second riveting piece 16 extends from one side of the annular member 15. The first insulating member 14 isolates the contact piece 12 and the annular member 15 from each other, thereby blocking the electrical connection between the two and achieving circuit insulation.

[0026] In some embodiments, the contact length between the contact piece 12 and the outer end of the first metal tube 11 is ≥6mm to improve the current carrying capacity and adapt to high current application scenarios. In a preferred embodiment, the contact length between the contact piece 12 and the outer end of the first metal tube 11 is 8mm.

[0027] Specifically, the first metal tube 11 is made of brass plated with nickel, and the nickel layer is relatively thin. This material has both excellent conductivity and corrosion resistance, which can ensure efficient current transmission and avoid poor contact caused by oxidation during long-term use. The first metal tube 11 is hollow cylindrical in shape and serves as the basic structural carrier of the female terminal 1. Its inner side is used to accommodate the first insulating component 14, and its outer end provides support for the assembly of the contact piece 12.

[0028] The contact piece 12 is generally annular with a notch. The contact piece 12 is made of elastic metal (such as nickel-plated brass) and has good deformation capability. The contact piece 12 is partially surrounded on the outer end of the first metal tube 11 with a surrounding angle ≥180°, preferably 270°-340°. Compared with the structure of "semi-annular contact piece partially contacting the inner side of the metal tube" in the DC plug of the prior art, this outer surrounding arrangement increases the contact area between the contact piece 12 and the first metal tube 11 by 3-5 times, significantly improving the current carrying capacity and making it suitable for high current applications of 10A and above (such as high-power chargers). One side of the contact piece 12 extends upward along the axial direction to form a first riveting piece 13. The initial shape of the first riveting piece 13 is a U-shaped opening structure to facilitate wire insertion.

[0029] The first insulating component 14 is made of PBT (polybutylene terephthalate), which has the characteristics of high temperature resistance, good electrical insulation performance, fast molding and easy molding. Of course, in other embodiments, the first insulating component 14 can be made of other insulating plastics or ceramics. The shape of the first insulating component 14 is adapted to the inner cavity of the first metal tube 11, and it is embedded in the inner cavity of the first metal tube 11 by interference fit. The center of the first insulating component 14 has an assembly hole adapted to the annular component 15 for fixing the annular component 15. At the same time, by utilizing the characteristics of the insulating material, the contact piece 12 and the annular component 15 are physically isolated in both radial and circumferential directions, completely blocking the electrical connection between the two, preventing short circuit, and ensuring that the current is transmitted only along the preset path. In addition, the initial shape of the second riveting piece 16 is also a U-shaped opening structure to facilitate the insertion of wires.

[0030] In actual assembly, two wires are respectively embedded into the U-shaped openings of the first rivet piece 13 and the second rivet piece 16. The female terminal 1 is placed in a special simple fixture. The pressing end of the fixture has an arc-shaped protrusion that matches the U-shaped opening. The arc-shaped protrusion causes the U-shaped openings of the first rivet piece 13 and the second rivet piece 16 to fold inward, forming a wrap-around pressing structure. This tightly fixes the wires inside the rivet pieces, eliminating the need for welding. This method is easy to process and does not rely on expensive automatic terminal crimping equipment, reducing production costs. It is also convenient to operate, and the connection strength between the wires and the rivet pieces after pressing is high and the contact is stable, avoiding the problems of false soldering and cold soldering that are prone to occur in traditional welding processes. At the same time, it significantly reduces processing costs and equipment investment thresholds. In addition, compared with the "metal contact lateral connecting piece" structural design of the DC plug in the prior art, the structure of the female terminal 1 is simplified, eliminating the need for cutting steps, streamlining the overall assembly process, improving production efficiency, and avoiding waste of parts.

[0031] In some embodiments, one end of the first insulating member 14 protrudes from the first metal tube 11, and one end face of the contact piece 12 is flush with the end face of the portion of the first insulating member 14 that protrudes from the first metal tube 11.

[0032] In this way, the flatness of the structure at the end of the female terminal 1 is guaranteed. Since the contact piece 12 has good deformation capability, in some preferred embodiments, the contact piece 12 can be riveted a second time, so that the upper part of the contact piece 12 is in close contact with the surface of the first insulating member 14. The first insulating member 14 is more firmly fixed in the first metal tube 11 by the contact piece 12. At the same time, the first insulating member 14 forms an axial limit on the riveted contact piece 12, preventing the contact piece 12 from being displaced after assembly.

[0033] In some embodiments, the second riveting piece 16 is adjacent to and below the first riveting piece 13, and the two are arranged in a compact manner to save space for one-time riveting forming. Thus, the first riveting piece 13 and the second riveting piece 16 are arranged in the same direction and side by side outside the first metal tube 11. Compared with the structure of "two riveting positions arranged radially inside the metal conduit" in the DC plug of the prior art, this compact layout can save the radial space of the first metal tube 11, thereby making the female terminal 1 smaller and cheaper.

[0034] In some embodiments, the male terminal 2 includes a second metal tube 21, a third rivet 22 disposed at one end of the second metal tube 21, a second insulating member 23 embedded in the second metal tube 21, and a fourth rivet 24 disposed in the second insulating member 23. The second insulating member 23 isolates the third rivet 22 and the fourth rivet 24 from each other to prevent them from forming an electrical connection. The first insulating member 14 and the second insulating member 23 are both made of PBT. The opening shape of any one of the first rivet 13, the second rivet 16 and the third rivet 22 is U-shaped, and the opening shape of the fourth rivet 24 is O-shaped. The first metal tube 11 and / or the second metal tube 21 are made of brass plated with nickel. Specifically, the material of the second insulating member 23 is the same as that of the first insulating member 14. The shape of the second insulating member 23 is adapted to the inner cavity of the second metal tube 21 and is embedded in the inner cavity of the second metal tube 21 by interference fit. The second insulating member 23 has a mounting hole at its center that matches the fourth rivet piece 24 for fixing the fourth rivet piece 24. At the same time, by utilizing the properties of the insulating material, the fourth rivet piece 24 and the third rivet piece 22 are physically isolated in both the radial and circumferential directions, completely blocking the electrical connection between them, preventing short circuits, and ensuring that the current is transmitted only along the preset path. In addition, the initial shape of the third rivet piece 22 is also a U-shaped opening structure to facilitate the insertion of wires. It should be noted that the U-shaped opening direction of the third rivet piece 22 is opposite to that of the first rivet piece 13.

[0035] In actual assembly, the two wires are respectively embedded in the third rivet piece 22 and the fourth rivet piece 24. The male terminal 2 is placed in a special simple fixture. The pressing end of the fixture is provided with an arc-shaped protrusion that matches the U-shaped opening. The arc-shaped protrusion causes the U-shaped opening of the third rivet piece 22 to fold inward, forming a wrap-around pressing structure, which tightly fixes the wire in the rivet piece. In addition, the arc-shaped protrusion can also press the O-shaped opening of the fourth rivet piece 24, thereby fixing the wire in the fourth rivet piece 24.

[0036] In some embodiments, the second metal tube 21 is provided with a thread 31 on the outside, and a locking cap 32 is rotatably connected to the first metal tube 11. A stop plate 33 is fixedly welded or integrally formed on the outside of the first metal tube 11. After the first metal tube 11 is inserted into the second metal tube 21, the locking cap 32 is screwed onto the thread 31 and abuts against the stop plate 33 to achieve locking and fixing of the female terminal 1 and the male terminal 2. The stop plate 33 is used to limit the maximum tightening position of the locking cap 32 to avoid damage to the components due to excessive tightening.

[0037] In some embodiments, the axial fit clearance between the locking cap 32 and the first metal tube 11 is 0.1 mm, the thickness of the contact piece 12 is 0.15 mm, and the contact piece 12 and the stop piece 33 together form a limiting structure to prevent the locking cap 32 from detaching from the first metal tube 11. Specifically, during assembly, the locking cap 32 is first fitted onto the first metal tube 11 on which the stop piece 33 is provided, and then the contact piece 12 is riveted onto the first metal tube 11.

[0038] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the present invention and should not be construed as limiting the scope of protection of the present invention in any way. Based on this explanation, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the present invention.

Claims

1. A crimped DC plug, characterized in that, include: Male terminal; and A female terminal detachably connected to the male terminal, the female terminal comprising: A first metal tube has a contact piece circumferentially arranged at its outer end. One side of the contact piece extends to form a first rivet piece. A first insulating element is embedded in the first metal tube. An annular element is assembled inside the first insulating element. One side of the annular element extends to form a second rivet piece. The first insulating element isolates the contact piece from the annular element, thereby preventing them from forming an electrical connection and achieving circuit insulation.

2. A crimped DC plug according to claim 1, characterized in that, One end of the first insulating member protrudes from the first metal tube, and one end face of the contact piece is flush with the end face of the portion of the first insulating member that protrudes from the first metal tube.

3. A crimped DC plug according to claim 1, characterized in that, The contact length between the contact piece and the outer end of the first metal tube is ≥6mm to improve the current carrying capacity and adapt to high current application scenarios.

4. A crimped DC plug according to claim 1, characterized in that, The second rivet is adjacent to and below the first rivet, and the two are arranged in a compact manner to save space, so as to achieve one-time riveting.

5. A crimped DC plug according to claim 1, characterized in that, The male terminal includes a second metal tube, a third rivet piece disposed at one end of the second metal tube, a second insulating member embedded inside the second metal tube, and a fourth rivet piece disposed inside the second insulating member. The second insulating member isolates the third rivet piece from the fourth rivet piece to prevent them from forming an electrical connection.

6. A crimped DC plug according to claim 5, characterized in that, The second metal tube has a thread on its outer side, and a locking cap is rotatably connected to the first metal tube. A stop plate is fixedly disposed on the outer side of the first metal tube. After the first metal tube is inserted into the second metal tube, the locking cap is screwed onto the thread and abuts against the stop plate to lock and fix the female terminal and the male terminal. The stop plate is used to limit the maximum tightening position of the locking cap.

7. A crimped DC plug according to claim 6, characterized in that, The axial clearance between the locking cap and the first metal tube is 0.1 mm, the thickness of the contact piece is 0.15 mm, and the contact piece and the stop piece together form a limiting structure to prevent the locking cap from detaching from the first metal tube.

8. A crimped DC plug according to claim 5, characterized in that, The opening shape of any one of the first rivet piece, the second rivet piece, and the third rivet piece is U-shaped.

9. A crimped DC plug according to claim 5, characterized in that, Both the first insulating component and the second insulating component are made of PBT.

10. A crimped DC plug according to claim 5, characterized in that, The first metal tube and / or the second metal tube are made of nickel-plated brass.

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