Copper-aluminum connector

Abstract

The copper-aluminum connector comprises a connector main body and a copper-aluminum contact piece located in the connector main body, the copper-aluminum contact piece comprises a copper contact section, an aluminum contact section and a copper-aluminum transition section located between the copper contact section and the aluminum contact section, the aluminum contact section is fixedly connected with an aluminum wire, and the aluminum contact section is fixedly connected with the aluminum wire. The copper-aluminum transition section comprises a copper part and an aluminum part, the copper part and the aluminum part are connected in a composite mode, and the copper part and the aluminum part are at least partially overlapped in the direction perpendicular to the axis of the copper-aluminum transition section. The copper-aluminum connector not only can avoid the problem of electrochemical corrosion, but also can improve the connection reliability of the copper-aluminum transition section.

Description

Technical Field

[0001] The utility model relates to the technical field of electric connectors, in particular to a copper-aluminum connector. Background Art

[0002] In the prior art, copper and aluminum are both excellent conductive materials, but aluminum has a lower density than copper, is cheaper and has abundant resources. Therefore, using aluminum instead of copper can not only reduce costs and product weight, but also make rational use of resources. However, there are some problems in specific applications. For example, the cable used in the junction box of the photovoltaic module is a copper core cable, and the copper core cable and the aluminum core cable cannot be directly connected when connected. Because the electrochemical properties of aluminum and copper are different, direct connection between the two will cause an electrochemical reaction, resulting in electrochemical corrosion, causing poor contact between copper and aluminum, increasing contact resistance, and affecting current transmission efficiency.

[0003] At present, copper-aluminum adapters are generally used to connect copper-core cables and aluminum-core cables in the market. The copper-aluminum adapters include copper terminals and aluminum terminals, and the opposite ends of the copper terminals and aluminum terminals are fixedly connected by friction welding. However, copper and aluminum have different thermal expansion coefficients. When fixed by welding, problems are prone to occur in the weld between the copper terminal and the aluminum terminal, affecting the connection quality; and only the axially opposite ends of the copper terminal and the aluminum terminal are connected together, the contact area at the connection is small, and the connection reliability is poor. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a copper-aluminum connector, which can perform a composite connection between copper and aluminum and can effectively improve the connection reliability of the copper-aluminum transition section.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A copper-aluminum connector comprises a connector body and a copper-aluminum contact piece located in the connector body, wherein the copper-aluminum contact piece comprises: a copper contact segment, an aluminum contact segment, and a copper-aluminum transition segment located between the copper contact segment and the aluminum contact segment, wherein the aluminum contact segment is fixedly connected to an aluminum wire, and the copper-aluminum transition segment comprises a copper part and an aluminum part, wherein the copper part is compositely connected to the aluminum part, and the copper part and the aluminum part at least partially overlap in a direction perpendicular to the axis of the copper-aluminum transition segment.

[0007] Optionally, the axis of the copper contact segment and the axis of the aluminum contact segment are not arranged colinearly.

[0008] Optionally, the cross-section of the copper-aluminum transition section perpendicular to the axis of the copper-aluminum transition section is U-shaped.

[0009] Optionally, the copper part and the aluminum part are both cylindrical structures.

[0010] Optionally, a diameter of the aluminum contact segment is greater than a diameter of the copper contact segment.

[0011] Optionally, the copper-aluminum transition section is an inner-outer joint structure, with the inner part being the aluminum part and the outer part being the copper part.

[0012] Optionally, the copper-aluminum transition section is a structure stacked up and down, and one of the copper part and the aluminum part is located at the top, and the other of the copper part and the aluminum part is located at the bottom.

[0013] Optionally, the thickness of the aluminum part is smaller than the thickness of the aluminum contact segment, and the thickness of the copper part is smaller than the thickness of the copper contact segment.

[0014] Optionally, in the copper-aluminum transition section, the copper part and the aluminum part are combined together through a bimetallic composite process to form a copper-aluminum bonding surface, and the area of ​​the copper-aluminum bonding surface is larger than the area of ​​any cross-section on the copper-aluminum transition section perpendicular to the axis of the copper-aluminum transition section.

[0015] Optionally, the length of the copper contact segment and the length of the aluminum contact segment are both greater than the length of the copper-aluminum transition segment.

[0016] Optionally, the length of the copper contact segment is greater than that of the aluminum contact segment, and a mounting groove is provided on the copper contact segment, a supporting clip is installed in the mounting groove, and the copper-aluminum contact is limited and fixed in the connector body by the supporting clip.

[0017] Optionally, the connector body includes a first connector body and a second connector body that are plugged into each other, the copper-aluminum contact is located inside the first connector body and the second connector body, the aluminum wire extends into the first connector body and is fixedly connected to the aluminum contact segment, and the copper wire extends into the second connector body and is fixedly connected to the copper contact segment.

[0018] Optionally, the copper-aluminum connector also includes a copper contact fixedly connected to the copper wire, the copper contact is located in the first connector body, the copper-aluminum contact is located in the second connector body, and when the first connector body and the second connector body are plugged in, the copper contact is docked with the copper-aluminum contact, the aluminum wire extends into the first connector body and is fixedly connected to the aluminum contact segment, and the copper wire extends into the second connector body and is fixedly connected to the copper contact.

[0019] Optionally, the copper-aluminum contact includes a first copper-aluminum contact and a second copper-aluminum contact, wherein the first copper-aluminum contact is located in the first connector body, the second copper-aluminum contact is located in the second connector body, and when the first connector body and the second connector body are plugged in, the first copper-aluminum contact is docked with the second copper-aluminum contact.

[0020] In summary, the beneficial effects of the present invention compared with the prior art are as follows:

[0021] 1. By compositely connecting the copper part and the aluminum part together, connection quality problems caused by welding connection can be avoided. In addition, by at least partially overlapping the copper part and the aluminum part in the axial direction perpendicular to the copper-aluminum transition section, the contact area between the copper part and the aluminum part at the copper-aluminum transition section can be increased, thereby improving the connection reliability of the copper-aluminum transition section.

[0022] 2. By arranging the axes of the copper contact segment and the aluminum contact segment to be non-collinear, the diameters of the copper contact segment and the aluminum contact segment can be set to be different while realizing integrated processing of the copper contact segment and the aluminum contact segment, so as to adapt to the connection requirements of cables with different diameters.

[0023] 3. By setting the diameter of the aluminum contact segment to be larger than the diameter of the copper contact segment, the copper contact segment and the aluminum contact segment can reduce the cost of the copper-aluminum contact as much as possible while meeting the flow requirements at the same time.

[0024] 4. By setting the thickness of the aluminum part to be smaller than the thickness of the aluminum contact section, and setting the thickness of the copper part to be smaller than the thickness of the copper contact section, the thickness of the copper contact section, the copper-aluminum transition section and the aluminum contact section can be smoothly transitioned, which facilitates integrated processing and reduces the impact on the flow capacity of the copper-aluminum contact.

[0025] 5. By setting the area of ​​the copper-aluminum bonding surface to be larger than the area of ​​any cross section of the copper-aluminum transition section perpendicular to the axis of the copper-aluminum transition section, this solution is different from the existing end friction welding connection method. On the basis of the existing structure, the copper-aluminum contact area inside the connector is increased to ensure the connection strength and connection stability.

[0026] 6. By setting the length of the copper contact section and the length of the aluminum contact section to be greater than the length of the copper-aluminum transition section, on the one hand, it can be ensured that the copper contact section and the aluminum contact section can meet their respective external connection requirements. On the other hand, controlling the length of the copper-aluminum transition section can reduce the area and processing workload of the composite connection, which is conducive to improving the composite connection processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a cross-sectional view of the copper-aluminum connector of the first embodiment in a separated state;

[0028] Figure 2 It is a cross-sectional view of the copper-aluminum connector in the combined state of the first embodiment;

[0029] Figure 3 is a cross-sectional view of the second connector body of the copper-aluminum connector of Example 1;

[0030] Figure 4 for Figure 3 A magnified view of the structure at center;

[0031] Figure 5 for Figure 3 A magnified view of the structure at B in the middle;

[0032] Figure 6 It is a structural diagram of the copper-aluminum contact of the copper-aluminum connector of the first embodiment;

[0033] Figure 7 is a cross-sectional view of a copper-aluminum contact of a copper-aluminum connector of Example 1;

[0034] Figure 8 A deformed structural diagram of the copper-aluminum contact of the copper-aluminum connector of the first embodiment;

[0035] Fig. 9 Another deformed structural diagram of the copper-aluminum contact piece of the copper-aluminum connector of the first embodiment;

[0036] Fig.10 A deformed structural diagram of the copper-aluminum connector of the first embodiment;

[0037] Fig.11 for Fig.10 A cross-sectional view of a second connector body;

[0038] Fig.12 for Fig.10 Structural diagram of copper-aluminum contact in China;

[0039] Fig.13 is a structural diagram of the copper-aluminum contact piece of Example 2;

[0040] Fig.14 is a cross-sectional view of the copper-aluminum contact piece of the second embodiment;

[0041] Fig.15 is a structural diagram of the copper-aluminum contact piece of Example 3;

[0042] Fig.16 is a cross-sectional view of the copper-aluminum contact piece of the third embodiment;

[0043] Fig.17 is a cross-sectional view of the copper-aluminum connector of the fourth embodiment;

[0044] Fig.18is a cross-sectional view of the copper-aluminum connector of Embodiment 5;

[0045] Fig.19 This is a structural diagram of the copper-aluminum contact piece of Example 5.

[0046] Reference numerals: 100 - first connector body; 110 - hook; 120 - first mounting cavity; 130 - first locking nut; 140 - first sealing member; 150 - sealing ring; 200 - second connector body; 210 - slot; 220 - second mounting cavity; 230 - second locking nut; 240 - second sealing member; 250 - first limiting step; 260 - second limiting step; 300 - copper-aluminum contact member; 3 01-first copper-aluminum contact piece; 302-second copper-aluminum contact piece; 310-copper contact section; 311-installation groove; 312-limiting protrusion; 320-aluminum contact section; 330-copper-aluminum transition section; 331-copper part; 332-aluminum part; 333-copper-aluminum joint surface; 400-copper contact piece; 500-watch strap contact finger; 600-support buckle; 700-anti-touch cap; 800-copper wire; 900-aluminum wire. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model. Example 1

[0050] like Figure 1-2 As shown, this embodiment provides a copper-aluminum connector, including a connector body and a copper-aluminum contact 300 located in the connector body.

[0051] In this embodiment, if Figure 1-2 As shown, the connector body includes a first connector body 100 and a second connector body 200 which are plugged into each other, and the copper-aluminum connector also includes a copper contact 400 fixedly connected to the copper wire 800, the copper contact 400 is located in the first connector body 100, the copper-aluminum contact 300 is located in the second connector body 200, the copper-aluminum contact 300 is fixedly connected to the aluminum wire 900, and when the first connector body 100 and the second connector body 200 are plugged in, the copper contact 400 is docked with the copper-aluminum contact 300, the aluminum wire 900 extends into the first connector body 100 and is fixedly connected to the copper-aluminum contact 300, and the copper wire 800 extends into the second connector body 200 and is fixedly connected to the copper contact 400.

[0052] In this embodiment, the copper wire 800 is a copper core cable, and the aluminum wire 900 is an aluminum core cable.

[0053] like Figure 1-2 As shown, the first connector body 100 is a female connector, and the second connector is a male connector, wherein a slot 210 is provided on the side of the male connector close to the female connector, and a hook 110 is provided on the side of the female connector close to the male connector. When the male connector is close to the female connector, the hook 110 extends into the slot 210 to achieve the male connector and the female connector being fixed. In addition, a sealing ring 150 is provided at the end of the female connector close to the male connector. When the male connector and the female connector are plugged in, the sealing ring 150 is tightly attached to the inner wall of the end of the male connector to achieve sealing at the plug-in place of the male connector and the female connector.

[0054] like Figure 1-2 As shown, a first mounting cavity 120 is provided inside the female connector, and a second mounting cavity 220 is provided inside the male connector. The main bodies of the female connector and the male connector are insulating parts. The copper contact 400 is installed and fixed in the first mounting cavity 120, and the copper-aluminum contact 300 is installed and fixed in the second mounting cavity 220.

[0055] like Figure 1-2 As shown, the side of the female connector away from the male connector has an opening connected to the first installation cavity 120, and the side of the male connector away from the female connector has an opening connected to the second installation cavity 220. The copper wire 800 extends into the first installation cavity 120 through the opening, and the aluminum wire 900 extends into the second installation cavity 220 through the opening.

[0056] Specifically, a first locking nut 130 is provided on the side of the female connector away from the male connector, the first locking nut 130 is threadedly connected to the female connector, and a first seal 140 is provided at the threaded connection between the first locking nut 130 and the female connector. By providing the first locking nut 130, the copper wire 800 and the copper contact 400 can be easily assembled into the installation cavity of the female connector. By providing the first seal 140, the threaded connection can be waterproof and dustproof to prevent water and dust from entering the interior of the connector; a second locking nut 230 is also provided on the side of the male connector away from the female connector, the second locking nut 230 is threadedly connected to the male connector, and a second seal 240 is provided at the threaded connection between the second locking nut 230 and the male connector. The technical effect produced by the second locking nut 230 and the second seal 240 is the same as that of the female connector.

[0057] like Figure 2 As shown, one end of the copper contact 400 is fixed to the copper wire 800 by welding or crimping, and the other end of the copper contact 400 is a hollow tube, and a strap contact finger 500 is provided inside the tube. The copper contact 400 contacts and cooperates with the copper-aluminum contact 300 through the strap contact finger 500, which can reduce contact resistance and improve power transmission efficiency.

[0058] like Figure 3-7 As shown, the copper-aluminum contact 300 includes: a copper contact section 310, an aluminum contact section 320, and a copper-aluminum transition section 330 located between the copper contact section 310 and the aluminum contact section 320, wherein the aluminum contact section 320 is fixedly connected to the aluminum wire 900, and the copper-aluminum transition section 330 includes a copper part 331 and an aluminum part 332, wherein the copper part 331 and the aluminum part 332 are compositely connected, and the copper part 331 and the aluminum part 332 at least partially overlap in the axial direction perpendicular to the copper-aluminum transition section 330. By compositely connecting the copper part 331 and the aluminum part 332 together, the connection quality problem caused by the welding connection can be avoided. In addition, by at least partially overlapping the copper part 331 and the aluminum part 332 in the axial direction perpendicular to the copper-aluminum transition section 330, the contact area between the copper part 331 and the aluminum part 332 at the copper-aluminum transition section 330 can be increased, and the connection reliability of the copper-aluminum transition section 330 can be improved.

[0059] like Figure 3 and Figure 7As shown, the axis a of the copper contact segment 310 and the axis b of the aluminum contact segment 320 are set to be non-collinear, and the diameters of the copper contact segment 310 and the aluminum contact segment 320 can be set to be different while realizing the integrated processing of the copper contact segment 310 and the aluminum contact segment 320, so as to adapt to the connection requirements of cables of different diameters. The diameter of the aluminum contact segment 320 is larger than the diameter of the copper contact segment 310, because the flow capacity of aluminum is smaller than that of copper. Under the condition of meeting the flow requirements, the diameter of the aluminum contact segment 320 is set to be larger than the diameter of the copper contact segment 310, so that the copper contact segment 310 and the aluminum contact segment 320 can reduce the material cost of the copper contact segment 310 as much as possible under the premise of meeting the flow requirements at the same time. Of course, when the flow capacity and cost are not considered, the diameter of the aluminum contact segment 320 can also be set to be less than or equal to the diameter of the copper contact segment 310. The cross-sectional shape of the copper-aluminum transition segment 330 perpendicular to the axis of the copper-aluminum transition segment 330 is U-shaped, which can reduce the processing area of ​​the copper-aluminum composite part and facilitate the improvement of processing efficiency and composite processing quality. The copper part 331 and the aluminum part 332 are both cylindrical structures, which are convenient for molding and processing and also convenient for the insertion and matching of the copper-aluminum contact 300 and the copper contact 400.

[0060] like Figure 6 As shown, the copper-aluminum transition section 330 is an inner-outer joint structure, and the inner part is an aluminum part 332, and the outer part is a copper part 331. Because aluminum is softer than copper, the strength of the transition section can be ensured by setting the aluminum inside the copper. If the influence of the material is not considered, the aluminum part can also be set on the outside and the copper part can be set on the inside. The thickness of the aluminum part 332 is less than the thickness of the aluminum contact section 320, and the thickness of the copper part 331 is less than the thickness of the copper contact section 310. More specifically, the thickness of the copper contact section 310 is less than the thickness of the aluminum contact section 320, which can make the thickness of the copper contact section 310, the copper-aluminum transition section 330 and the aluminum contact section 320 smoothly transition, which is convenient for integrated processing and can reduce the influence on the flow capacity of the copper-aluminum contact 300.

[0061] like Figure 5 and Figure 6 As shown, in the copper-aluminum transition section 330, the copper part 331 and the aluminum part 332 are combined together through a bimetallic isothermal composite process to form a copper-aluminum bonding surface 333. The area of ​​the copper-aluminum bonding surface 333 is larger than the area of ​​any cross section of the copper-aluminum transition section 330 perpendicular to the axis of the copper-aluminum transition section 330, so that this solution is different from the existing end friction welding connection method, and increases the copper-aluminum contact area inside the connector on the basis of the existing structure, ensuring the connection strength and connection stability. In the copper-aluminum transition section, the copper part 331 and the aluminum part 332 are combined together through a composite process of dissimilar metals to form a copper-aluminum bonding surface 333. There is no gap between copper and aluminum, thereby avoiding electrochemical corrosion between the copper conductive part and the aluminum conductive part.

[0062] like Figure 6 and Figure 7 As shown, the length of the copper contact segment 310 and the length of the aluminum contact segment 320 are both greater than the length of the copper-aluminum transition segment 330. On the one hand, it can ensure that the copper contact segment 310 and the aluminum contact segment 320 can meet their respective external connection requirements. On the other hand, controlling the length of the copper-aluminum transition segment 330 can reduce the area and processing workload of the composite connection, which is conducive to improving the composite connection processing efficiency.

[0063] like Figure 4 , Figure 6 and Figure 7 As shown, the length of the copper contact section 310 is greater than that of the aluminum contact section 320, and the copper contact section 310 is provided with a mounting groove 311, in which a support buckle 600 is installed, and the support buckle includes a plurality of elastic sheets evenly arranged along the circumferential direction, and the copper-aluminum contact 300 is limited and fixed at the first limiting step 250 in the connector body by the elastic sheets of the support buckle 600, so as to prevent the copper-aluminum contact 300 from withdrawing from the connector body after installation. In addition, as Figure 5 As shown, a limiting protrusion 312 is provided on the outer wall of one side of the copper contact end close to the copper-aluminum transition section 330, and the limiting protrusion 312 cooperates with the second limiting step 260 in the second mounting cavity 220 to limit the axial insertion depth of the copper-aluminum contact 300 in the second mounting cavity 220. The supporting clip 600 and the limiting protrusion 312 on the outer wall of the copper-aluminum contact 300 cooperate with the two limiting steps in the second mounting cavity 220 to achieve limiting fixation of the copper-aluminum contact 300, thereby preventing the copper-aluminum contact 300 from changing its position when the connector is used.

[0064] like Figure 6 and Figure 7 As shown, the aluminum contact section 320 is a hollow cylindrical structure, and the aluminum wire 900 can be inserted into the aluminum contact end and fixedly connected by welding or crimping. By setting the diameter of the aluminum contact section 320 to be larger than the copper contact section 310, the diameter of the aluminum wire 900 can be larger than the diameter of the copper wire 800, which can meet the connector's greater current requirements.

[0065] like Figure 7 As shown, an anti-contact cap 700 is installed at the end of the copper contact section 310 that is plugged into the copper contact piece 400 .

[0066] The main manufacturing and assembly process of the male connector of the above-mentioned copper-aluminum connector is as follows: first, the copper plate and the aluminum plate are composited by a dissimilar metal composite process, and then the composite copper-aluminum composite plate is stamped and curled to obtain the copper-aluminum contact 300; then the copper-aluminum contact 300 and the aluminum wire 900 are crimped and fixed, and then the anti-touch cap and the supporting clip are installed, and then they are extended into the second installation cavity 220 of the male connector together for position fixing, and then they are threadedly connected to the main body of the female connector through a locking nut to achieve the sealing of the connection end of the aluminum wire 900 and the copper-aluminum contact 300 in the female connector.

[0067] like Figure 8 As shown, a variation of the aluminum contact segment 320 is provided, that is, the aluminum contact segment 320 is set to a U-shaped structure, where the U-shape means that the cross-section of the aluminum contact segment 320 perpendicular to the axis of the copper-aluminum contact piece 300 is U-shaped. The aluminum contact segment 320 is set to a U-shape, and the upper and left and right directions of the aluminum contact segment 320 are all open, which is convenient for connection and fixation with the aluminum wire 900.

[0068] like Fig. 9 As shown, another variation of the aluminum contact segment 320 is provided, that is, the aluminum contact segment 320 is set to a flat structure. Setting the aluminum contact segment 320 to a flat structure can facilitate welding or crimping connection with the aluminum wire 900.

[0069] like Figure 10-12 As shown, a variation of the copper-aluminum connector is provided, that is, the copper-aluminum contact 300 is arranged in the female connector, the copper contact 400 is arranged in the male connector, and a watch strap contact finger 500 is provided inside the copper-aluminum connector close to the copper connector. When the copper-aluminum contact 300 is plugged into the copper contact 400, the copper contact 400 extends into the copper-aluminum contact 300 and contacts the watch strap contact finger 500. Example 2

[0070] The difference between this embodiment and the first embodiment is that the copper-aluminum transition section 330 is a closed hollow tube structure.

[0071] like Figure 13-14 As shown, this embodiment provides a copper-aluminum connector, and the copper-aluminum transition section 330 located between the copper contact section 310 and the aluminum contact section 320 is a hollow tube structure with a gradually increasing diameter from left to right, and the diameter of the copper-aluminum transition section 330 naturally transitions from the copper contact section 310 to the aluminum contact section 320, that is, the diameter of the leftmost side of the copper-aluminum transition section 330 is equal to the diameter of the copper contact section 310, and the diameter of the rightmost side of the copper-aluminum transition section 330 is equal to the diameter of the aluminum contact section 320. In addition, the wall thickness of the copper-aluminum transition section 330 also changes from left to right with a gradually increasing thickness, and the axes of the copper contact section 310 and the aluminum contact section 320 are located on a straight line, that is, coaxially arranged, so that the copper-aluminum contact piece 300 can be formed in one piece. Example 3

[0072] The difference between this embodiment and the above-mentioned embodiment is that the copper-aluminum transition section 330 is a vertically stacked structure.

[0073] like Figure 15-16 As shown, this embodiment provides a copper-aluminum connector, the copper-aluminum transition section 330 is a structure stacked up and down, and one of the copper part 331 and the aluminum part 332 is located at the top, and the other of the copper part 331 and the aluminum part 332 is located at the bottom. Specifically, in this embodiment, the copper part 331 is located at the bottom in the copper-aluminum transition section 330, and the aluminum part 332 is located at the top in the copper-aluminum transition section 330, and the copper part 331 and the aluminum part 332 are both flat structures. The copper-aluminum transition section 330 of this embodiment can be composite-processed after the copper contact section 310 is stamped and formed, and the copper part 331 and the aluminum part 332 are both flat structures, so the composite processing operation is simpler. Example 4

[0074] The difference between this embodiment and the above-mentioned embodiments is that the copper-aluminum contact 300 includes a first copper-aluminum contact 301 and a second copper-aluminum contact 302 .

[0075] like Fig.17 As shown, this embodiment provides a copper-aluminum connector, the connector body includes a first connector body 100 and a second connector body 200 which are plugged into each other, the copper-aluminum contact 300 includes a first copper-aluminum contact 301 and a second copper-aluminum contact 302, wherein the first copper-aluminum contact 301 is located in the first connector body 100, and the second copper-aluminum contact 302 is located in the second connector body 200, and when the first connector body 100 and the second connector body 200 are plugged in, the first copper-aluminum contact 301 is butted with the second copper-aluminum contact 302, wherein the aluminum wires 900 on both sides are fixedly connected to the copper contact segments 310 of the first copper-aluminum contact 301 and the copper contact segments 310 of the second copper-aluminum contact 302, respectively, and the aluminum wires 900 can be butted against each other through this solution. In addition, by replacing the female connector or the male connector with the copper contact 400, the copper wire 800 can also be butt-connected with the aluminum wire 900.

[0076] Specifically, a watch strap contact finger 500 is provided at the end of the copper-aluminum contact 300 in the female connector, and the copper contact segment 310 of the copper-aluminum connector in the male connector extends into the copper contact segment 310 of the copper-aluminum connector of the female connector and contacts the watch strap contact finger 500. Example 5

[0077] The difference between this embodiment and the previous embodiment is that the copper-aluminum contact 300 is located inside both the first connector body 100 and the second connector body 200 .

[0078] like Figure 18-19 As shown, this embodiment provides a copper-aluminum connector, the connector body includes a first connector body 100 and a second connector body 200 that are plugged into each other, the copper-aluminum contact piece 300 is located inside the first connector body 100 and the second connector body 200 at the same time, the aluminum wire 900 extends into the first connector body 100 and is fixedly connected to the aluminum contact section 320, and the copper wire 800 extends into the second connector body 200 and is fixedly connected to the copper contact section 310. This solution can seal and protect the transition connection structure, and can also inspect and repair the transition connection structure by disassembling the male and female connectors.

[0079] like Fig.19 As shown, the copper-aluminum contact 300 includes a copper contact section 310, an aluminum contact section 320 and a copper-aluminum transition section 330, wherein the diameter of the aluminum contact section 320 is larger than that of the copper contact section 310, and the copper-aluminum transition section 330 is an upwardly open structure, and the copper-aluminum transition section 330 is an inner and outer outer joint structure, the inner side is an aluminum part 332, and the outer side is a copper part 331. It is easy to imagine that the diameter of the aluminum contact section 320 can also be set to be the same as that of the copper contact section 310, so as to facilitate the integral molding of the entire copper-aluminum contact 300 after the copper-aluminum composite is completed.

[0080] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A copper-aluminum connector, comprising a connector body and a copper-aluminum contact member located in the connector body, characterized in that: The copper-aluminum contact piece includes: a copper contact segment, an aluminum contact segment and a copper-aluminum transition segment located between the copper contact segment and the aluminum contact segment, wherein the aluminum contact segment is fixedly connected to the aluminum wire, and the copper-aluminum transition segment includes a copper part and an aluminum part, the copper part is compositely connected to the aluminum part, and the copper part and the aluminum part at least partially overlap in the axial direction perpendicular to the copper-aluminum transition segment.

2. The copper-aluminum connector according to claim 1, characterized in that: The axis of the copper contact segment and the axis of the aluminum contact segment are not arranged collinearly.

3. The copper-aluminum connector according to claim 2, characterized in that: The cross-section of the copper-aluminum transition section perpendicular to the axis of the copper-aluminum transition section is U-shaped.

4. The copper-aluminum connector according to claim 2, characterized in that: The copper part and the aluminum part are both cylindrical structures.

5. The copper-aluminum connector according to claim 2, characterized in that: The diameter of the aluminum contact segment is greater than the diameter of the copper contact segment.

6. The copper-aluminum connector according to claim 1, characterized in that: The copper-aluminum transition section is an inner-outer-outer joint structure, wherein the inner part is the aluminum part and the outer part is the copper part.

7. The copper-aluminum connector according to claim 6, characterized in that: The thickness of the aluminum part is smaller than the thickness of the aluminum contact section, and the thickness of the copper part is smaller than the thickness of the copper contact section.

8. The copper-aluminum connector according to claim 1, characterized in that: The copper-aluminum transition section is a structure stacked up and down, and one of the copper part and the aluminum part is located at the top, and the other of the copper part and the aluminum part is located at the bottom.

9. The copper-aluminum connector according to claim 1, characterized in that: In the copper-aluminum transition section, the copper part and the aluminum part are combined together through a bimetallic composite process to form a copper-aluminum bonding surface, and the area of ​​the copper-aluminum bonding surface is larger than the area of ​​any cross-section of the copper-aluminum transition section perpendicular to the axis of the copper-aluminum transition section.

10. The copper-aluminum connector according to claim 1, characterized in that: The length of the copper contact section and the length of the aluminum contact section are both greater than the length of the copper-aluminum transition section.

11. The copper-aluminum connector according to claim 10, characterized in that: The length of the copper contact section is greater than that of the aluminum contact section, and a mounting groove is provided on the copper contact section, a supporting clip is installed in the mounting groove, and the copper-aluminum contact is limited and fixed in the connector body by the supporting clip.

12. The copper-aluminum connector according to any one of claims 1 to 11, characterized in that: The connector body includes a first connector body and a second connector body that are plugged into each other, the copper-aluminum contact piece is located inside the first connector body and the second connector body, the aluminum wire extends into the first connector body and is fixedly connected to the aluminum contact segment, and the copper wire extends into the second connector body and is fixedly connected to the copper contact segment.

13. The copper-aluminum connector according to any one of claims 1 to 11, characterized in that: The connector body includes a first connector body and a second connector body that are plugged into each other, and the copper-aluminum connector also includes a copper contact piece fixedly connected to the copper wire, the copper contact piece is located in the first connector body, and the copper-aluminum contact piece is located in the second connector body, and when the first connector body and the second connector body are plugged into each other, the copper contact piece is docked with the copper-aluminum contact piece, the aluminum wire extends into the first connector body and is fixedly connected to the aluminum contact segment, and the copper wire extends into the second connector body and is fixedly connected to the copper contact piece.

14. The copper-aluminum connector according to any one of claims 1 to 11, characterized in that: The connector body includes a first connector body and a second connector body that are plugged into each other, and the copper-aluminum contact includes a first copper-aluminum contact and a second copper-aluminum contact, wherein the first copper-aluminum contact is located in the first connector body, and the second copper-aluminum contact is located in the second connector body, and when the first connector body and the second connector body are plugged into each other, the first copper-aluminum contact is docked with the second copper-aluminum contact.

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