Terminal, terminal assembly and electric connection device

Abstract

The utility model discloses a terminal, a terminal assembly and an electric connection device. The terminal comprises a cylindrical body which comprises a front cylindrical part used for being matched with a matching terminal and a rear cylindrical part used for being combined with an injection molding sealing element; and the welding part is connected with the rear end of the cylindrical body and is used for being welded on a conductor of a power transmission piece. The terminal is a copper terminal which is integrally formed by punching, and a nickel plating layer is formed on the whole terminal and is a bottom plating layer of the terminal; the terminal is provided with a matching area positioned on the front cylinder part, an injection molding area positioned on the rear cylinder part and a welding area positioned on the welding part; a silver plating layer is formed on the nickel plating layer of the matching area of the terminal, and a tin plating layer is formed on the nickel plating layer of the injection molding area of the terminal. According to the utility model, the tin plating layer on the injection molding area of the terminal is well combined with the injection molding sealing element, so that the waterproof sealing performance of the terminal can be improved. Moreover, a silver plating layer does not need to be formed on the whole terminal, so that the cost of the terminal can be reduced.

Description

Technical Field

[0001] The utility model relates to a terminal, including a terminal assembly of the terminal and an electrical connection device including the terminal assembly. Background Art

[0002] In the prior art, with the increasingly fierce competition in the automotive market, the control of terminal costs has become stricter. Stamped terminals have more cost advantages. Although stamped terminals have many advantages, since they are innovative technologies, there are also many technical difficulties. For example, how to form a coating on the terminal. To ensure electrical contact performance, a silver coating is usually formed on the entire terminal. However, the bonding performance between the silver coating and the silicone sealant injection-molded on the terminal is poor, and gaps are likely to appear between the two, reducing the waterproof and sealing performance of the terminal. In addition, forming a silver coating on the entire terminal increases costs. Summary of the Utility Model

[0003] The purpose of the utility model aims to solve at least one of the above problems and defects existing in the prior art.

[0004] According to one aspect of the utility model, a terminal is provided. The terminal includes: a cylindrical body including a front cylindrical portion for mating with a mating terminal and a rear cylindrical portion for bonding with an injection-molded seal; and a welding portion connected to the rear end of the cylindrical body for welding to a conductor of a power transmission member. The terminal is an integrally stamped copper terminal and has a nickel coating formed on the entire terminal, and the nickel coating is the bottom coating of the terminal; the terminal has a mating area located in the front cylindrical portion, an injection area located in the rear cylindrical portion, and a welding area located in the welding portion; a silver coating is formed on the nickel coating in the mating area of the terminal, and a tin coating is formed on the nickel coating in the injection area of the terminal.

[0005] According to an exemplary embodiment of the utility model, the tin coating on the injection area of the terminal is used to bond with an injection-molded seal injection-molded on the rear cylindrical portion of the terminal to increase the bonding force between the terminal and the injection-molded seal.

[0006] According to another exemplary embodiment of the utility model, the silver coating on the mating area of the terminal is used to make electrical contact with an elastic contact member inserted into the front cylindrical portion of the terminal to improve the electrical contact performance between the terminal and the elastic contact member.

[0007] According to another exemplary embodiment of the utility model, no other coating is formed on the nickel coating in the welding area of the terminal; the conductor of the power transmission member is a copper conductor, and the copper conductor is welded to the nickel coating in the welding area of the terminal.

[0008] According to another exemplary embodiment of the present utility model, a silver plating layer is formed on the nickel plating layer of the welding area of the terminal; the conductor of the power transmission member is an aluminum conductor, and the aluminum conductor is welded to the silver plating layer of the welding area of the terminal.

[0009] According to another exemplary embodiment of the present utility model, an opening is formed on the rear barrel portion of the terminal to allow the injection molding material for forming the injection molding seal to enter the inner cavity of the rear barrel portion of the terminal through the opening and seal the inner cavity of the rear barrel portion.

[0010] According to another exemplary embodiment of the present utility model, the opening is arc-shaped and extends along the circumferential direction of the rear barrel portion. A pair of the openings are formed on the rear barrel portion, and the pair of openings are spaced apart in the axial direction of the rear barrel portion; the rear barrel portion has an arc-shaped bridge portion located between the pair of openings, and the arc-shaped bridge portion is used to be embedded into the injection molding seal to be combined with the injection molding seal.

[0011] According to another exemplary embodiment of the present utility model, rolling patterns are formed on the inner circumferential surface of the rear barrel portion of the terminal, and the rolling patterns are used to combine with the injection molding material entering the inner cavity of the rear barrel portion of the terminal to increase the bonding force between the rear barrel portion of the terminal and the injection molding seal.

[0012] According to another exemplary embodiment of the present utility model, a plurality of first positioning protrusions and a plurality of second positioning protrusions are formed on the inner circumferential surface of the front barrel portion of the terminal. The plurality of first positioning protrusions are spaced apart in the circumferential direction of the front barrel portion, and the plurality of second positioning protrusions are spaced apart in the circumferential direction of the front barrel portion; the first positioning protrusion and the second positioning protrusion are spaced relative to each other in the axial direction of the front barrel portion and are adapted to respectively abut against the front end and the rear end of the elastic contact member inserted into the front barrel portion to axially position the elastic contact member.

[0013] According to another exemplary embodiment of the present utility model, a drain hole is formed on the peripheral wall of the front barrel portion of the terminal, so that the water entering the inner cavity of the front barrel portion of the terminal can be discharged through the drain hole.

[0014] According to another exemplary embodiment of the present utility model, the cylindrical body of the terminal has a pair of side portions spliced together. A plurality of engaging grooves are formed on one of the pair of side portions, and a plurality of engaging protrusions are formed on the other; the plurality of engaging grooves are spaced apart in the axial direction of the cylindrical body, and the plurality of engaging protrusions are spaced apart in the axial direction of the cylindrical body and are respectively engaged with the plurality of engaging grooves to splice the pair of side portions of the cylindrical body together.

[0015] According to another exemplary embodiment of the present utility model, the engaging groove and the engaging protrusion are in an Ω shape or a dovetail shape.

[0016] According to another exemplary embodiment of the present utility model, the nickel plating, silver plating, and tin plating on the terminal respectively have uniform thicknesses, and the thickness of the silver plating is equal to the thickness of the tin plating.

[0017] According to another aspect of the present utility model, there is provided a terminal assembly. The terminal assembly includes: the aforementioned terminal, which is adapted to be inserted into a terminal jack of a housing of an electrical connection device; and an injection-molded seal, which is injection-molded onto a rear barrel portion of the terminal for sealing an inner cavity of the rear barrel portion and the terminal jack.

[0018] According to an exemplary embodiment of the present utility model, the injection-molded seal includes: an inner seal portion, which is located inside a rear barrel portion of the terminal for sealing the inner cavity of the rear barrel portion; and an outer seal portion, which is located outside the rear barrel portion of the terminal and is adapted to be pressed between the rear barrel portion and an inner wall of the terminal jack for sealing the terminal jack. The inner seal portion is combined with a tin plating on an inner circumferential surface of the rear barrel portion, and the outer seal portion is combined with a tin plating on an outer circumferential surface of the rear barrel portion.

[0019] According to another exemplary embodiment of the present utility model, the injection-molded seal is formed of a silicone material injection-molded onto the rear barrel portion of the terminal.

[0020] According to another exemplary embodiment of the present utility model, the terminal assembly further includes: an elastic contact member, which is inserted into a front barrel portion of the terminal and is in electrical contact with a silver plating on an inner circumferential surface of the front barrel portion. The elastic contact member is used for making electrical contact with a mating terminal inserted into the front barrel portion of the terminal, so that the mating terminal can be electrically connected to the terminal via the elastic contact member.

[0021] According to another exemplary embodiment of the present utility model, the elastic contact member includes: a pair of annular ends; and a plurality of elastic arm portions, which are connected between the pair of annular ends. The plurality of elastic arm portions are spaced apart circumferentially on the annular ends for making electrical contact with an outer circumferential surface of the inserted mating terminal.

[0022] According to another exemplary embodiment of the present utility model, the elastic contact member is a one-piece stamping-molded copper component.

[0023] According to another exemplary embodiment of the present utility model, the terminal assembly further includes: a power transmission member, whose conductor is welded to a welding portion of the terminal to be electrically connected to the terminal.

[0024] According to another exemplary embodiment of the present utility model, no other coating is formed on the nickel coating of the welding area of the terminal; the conductor of the power transmission member is a copper conductor, and the copper conductor is welded to the nickel coating of the welding area of the terminal.

[0025] According to another exemplary embodiment of the present utility model, a silver coating is formed on the nickel coating of the welding area of the terminal; the conductor of the power transmission member is an aluminum conductor, and the aluminum conductor is welded to the silver coating of the welding area of the terminal.

[0026] According to another exemplary embodiment of the present utility model, the welding part of the terminal is flat, the conductor of the power transmission member has a flat welding end, and the flat welding end of the power transmission member is welded to the flat welding part of the terminal.

[0027] According to another aspect of the present utility model, an electrical connection device is provided. The electrical connection device includes: a housing formed with a terminal jack; and the aforementioned terminal assembly inserted into the terminal jack. The terminal assembly is used for making electrical contact with the mating terminal of the electrical connection device inserted into the terminal jack to electrically connect the electrical connection device and the mating electrical connection device.

[0028] According to an exemplary embodiment of the present utility model, the electrical connection device is a charging base, and the mating electrical connection device is a charging gun adapted to mate with the charging base; or the electrical connection device is a charging gun, and the mating electrical connection device is a charging base adapted to mate with the charging gun.

[0029] In the foregoing various exemplary embodiments according to the present utility model, a silver coating is formed on the mating area of the terminal that mates with the mating terminal, and a tin coating is formed on the injection area of the terminal that combines with the injection seal. The combination between the tin coating on the injection area of the terminal and the injection seal is good, which can improve the waterproof sealing performance of the terminal. Moreover, since it is not necessary to form a silver coating on the entire terminal, the cost of the terminal can be reduced.

[0030] Through the description of the present utility model with reference to the accompanying drawings hereinafter, other objects and advantages of the present utility model will become obvious and can help to comprehensively understand the present utility model. Description of the Drawings

[0031] Figure 1 A three-dimensional schematic diagram showing a terminal according to an exemplary embodiment of the present utility model;

[0032] Figure 2 An axial sectional view showing a terminal according to an exemplary embodiment of the present utility model;

[0033] Figure 3 Schematic plan view of a terminal according to an exemplary embodiment of the present utility model;

[0034] Figure 4 Schematic cross-sectional view of a terminal according to an exemplary embodiment of the present utility model;

[0035] Figure 5 Showing on Figure 4 Schematic diagram of forming a nickel plating layer on the terminal shown;

[0036] Figure 6 Showing on Figure 5 Schematic diagram of forming a silver plating layer and a tin plating layer on the nickel plating layers of the mating area and the injection molding area of the terminal shown respectively, wherein no other plating layer is formed on the nickel plating layer of the welding area of the terminal;

[0037] Figure 7 Showing on Figure 6 Schematic diagram of forming an injection molding seal on the rear barrel part of the terminal shown;

[0038] Figure 8 Showing on Figure 7 Schematic diagram of welding a conductor of a power transmission component on the welding part of the terminal shown;

[0039] Figure 9 Showing on Figure 5 Schematic diagram of forming a silver plating layer, a tin plating layer and a silver plating layer on the nickel plating layers of the mating area, the injection molding area and the welding area of the terminal shown respectively;

[0040] Figure 10 Showing on Figure 9 Schematic diagram of forming an injection molding seal on the rear barrel part of the terminal shown;

[0041] Figure 11 Showing on Figure 10 Schematic diagram of welding a conductor of a power transmission component on the welding part of the terminal shown;

[0042] Figure 12 Axial cross-sectional view of a terminal assembly according to an exemplary embodiment of the present utility model. Detailed implementation mode

[0043] The technical solutions of the present utility model will be further specifically described below through embodiments in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The description of the embodiments of the present utility model with reference to the accompanying drawings is intended to explain the overall inventive concept of the present utility model, and should not be construed as a limitation of the present utility model.

[0044] In addition, in the following detailed description, for the sake of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. However, it is obvious that one or more embodiments may be implemented without these specific details. In other instances, well-known structures and devices are shown in diagrammatic form in order to simplify the drawings.

[0045] According to one general technical concept of the present utility model, a terminal is provided. The terminal includes: a cylindrical body including a front cylindrical portion for mating with a mating terminal and a rear cylindrical portion for bonding with an injection molding seal; and a welding portion connected to the rear end of the cylindrical body for welding to a conductor of a power transmission member. The terminal is a one-piece stamping formed copper terminal and a nickel plating layer is formed over the entire terminal, and the nickel plating layer is the base plating layer of the terminal; the terminal has a mating region located in the front cylindrical portion, an injection molding region located in the rear cylindrical portion, and a welding region located in the welding portion; a silver plating layer is formed on the nickel plating layer in the mating region of the terminal, and a tin plating layer is formed on the nickel plating layer in the injection molding region of the terminal.

[0046] According to another general technical concept of the present utility model, a terminal is provided. The terminal includes: a cylindrical body including a front cylindrical portion for mating with a mating terminal and a rear cylindrical portion for bonding with an injection molding seal; and a welding portion connected to the rear end of the cylindrical body for welding to a conductor of a power transmission member. The terminal is a one-piece stamping formed copper terminal and a nickel plating layer is formed over the entire terminal, and the nickel plating layer is the base plating layer of the terminal. The terminal has a mating region located in the front cylindrical portion, an injection molding region located in the rear cylindrical portion, and a welding region located in the welding portion. A silver plating layer is formed on the nickel plating layer in the mating region of the terminal, and a tin plating layer is formed on the nickel plating layer in the injection molding region of the terminal. No other plating layer is formed on the nickel plating layer in the welding region of the terminal or a silver plating layer is formed on the nickel plating layer in the welding region of the terminal.

[0047] According to another general technical concept of the present utility model, a terminal assembly is provided. The terminal assembly includes: the aforementioned terminal adapted to be inserted into a terminal jack of a housing of an electrical connection device; and an injection molding seal injection molded onto the rear cylindrical portion of the terminal for sealing the inner cavity of the rear cylindrical portion and the terminal jack.

[0048] According to another general technical concept of the present utility model, an electrical connection device is provided. The electrical connection device includes: a housing formed with a terminal jack; and the aforementioned terminal assembly inserted into the terminal jack. The terminal assembly is used for making electrical contact with a mating terminal of a mating electrical connection device inserted into the terminal jack to electrically connect the electrical connection device and the mating electrical connection device.

[0049] Figure 1Showing a perspective view of terminal 1 according to an exemplary embodiment of the present utility model; Figure 2 Showing an axial cross-sectional view of terminal 1 according to an exemplary embodiment of the present utility model; Figure 3 Showing a plan view of terminal 1 according to an exemplary embodiment of the present utility model; Figure 4 Showing a cross-sectional view of terminal 1 according to an exemplary embodiment of the present utility model; Figure 5 Showing in Figure 4 A schematic diagram of forming a nickel plating layer 1a on the shown terminal 1; Figure 6 Showing in Figure 5 A schematic diagram of forming a silver plating layer 1b and a tin plating layer 1c on the nickel plating layer 1a of the mating area Z1 and the injection molding area Z2 of the shown terminal 1 respectively, wherein no other plating layer is formed on the nickel plating layer 1a of the welding area Z3 of the terminal; Figure 7 Showing in Figure 6 A schematic diagram of forming an injection molding seal 2 on the rear barrel portion 12 of the shown terminal 1; Figure 8 Showing in Figure 7 A schematic diagram of welding the conductor 30 of the power transmission member 3 to the welding portion 13 of the shown terminal 1.

[0050] As Figures 1 to 8 Shown, in an exemplary embodiment of the present utility model, a terminal 1 is disclosed. The terminal 1 includes: a cylindrical body 10 and a welding portion 13. The cylindrical body 10 includes a front barrel portion 11 for mating with a mating terminal (not shown) and a rear barrel portion 12 for bonding with the injection molding seal 2. The welding portion 13 is connected to the rear end of the cylindrical body 10 and is used for welding to the conductor 30 of the power transmission member 3.

[0051] As Figures 1 to 8 Shown, in the illustrated embodiment, the terminal 1 is an integrally stamped copper terminal and a nickel plating layer 1a is formed on the entire terminal 1, and the nickel plating layer 1a is the bottom plating layer of the terminal 1. The terminal 1 has a mating area Z1 located in the front barrel portion 11, an injection molding area Z2 located in the rear barrel portion 12, and a welding area Z3 located in the welding portion 13. A silver plating layer 1b is formed on the nickel plating layer 1a in the mating area Z1 of the terminal 1, and a tin plating layer 1c is formed on the nickel plating layer 1a in the injection molding area Z2 of the terminal 1.

[0052] As Figures 1 to 8 Shown, in the illustrated embodiment, the tin plating layer 1c on the injection molding area Z2 of the terminal 1 is used for engaging with the injection molding seal 2 injection molded onto the rear barrel portion 12 of the terminal 1 to increase the bonding force between the terminal 1 and the injection molding seal 2.

[0053] Figure 12 Showing an axial cross-sectional view of a terminal assembly according to an exemplary embodiment of the present utility model.

[0054] As shown in Figures 1-8 and Figure 12 In the illustrated embodiment, the silver plating 1b on the mating area Z1 of the terminal 1 is used for electrical contact with the elastic contact member 4 inserted into the front cylinder portion 11 of the terminal 1, so as to improve the electrical contact performance between the terminal 1 and the elastic contact member 4.

[0055] As shown in Figures 1-8 and Figure 12 In the illustrated embodiment, no other plating is formed on the nickel plating 1a in the welding area Z3 of the terminal 1;

[0056] The conductor 30 of the power transmission member 3 is a copper conductor, and the copper conductor is welded to the nickel plating 1a in the welding area Z3 of the terminal 1.

[0057] Figure 9 Schematic diagrams showing silver plating, tin plating and silver plating formed on the nickel plating in the mating area, injection molding area and welding area of the terminal shown in Figure 5 respectively; Figure 10 Schematic diagram showing an injection molding seal formed on the rear cylinder portion of the terminal shown in Figure 9 ; Figure 11 Schematic diagram showing the conductor of the power transmission member welded to the welding portion of the terminal shown in Figure 10 ;

[0058] As shown in Figures 9 to 11 In the illustrated embodiment, a silver plating 1b is formed on the nickel plating 1a in the welding area Z3 of the terminal 1. The conductor 30 of the power transmission member 3 is an aluminum conductor, and the aluminum conductor is welded to the silver plating 1b in the welding area Z3 of the terminal 1.

[0059] As shown in Figures 1 to 12 In the illustrated embodiment, an opening 101 is formed in the rear cylinder portion 12 of the terminal 1 to allow the injection molding material for forming the injection molding seal 2 to enter the inner cavity of the rear cylinder portion 12 of the terminal 1 through the opening 101 and seal the inner cavity of the rear cylinder portion 12.

[0060] As shown in Figures 1 to 12 In the illustrated embodiment, the opening 101 is arc-shaped and extends circumferentially along the rear cylinder portion 12. A pair of openings 101 are formed on the rear cylinder portion 12, and the pair of openings 101 are spaced apart axially on the rear cylinder portion 12. The rear cylinder portion 12 has an arc-shaped bridge portion 102 located between the pair of openings 101, and the arc-shaped bridge portion 102 is used to be embedded into the injection molding seal 2 to be combined with the injection molding seal 2.

[0061] As shown in Figures 1 to 12As shown, in the illustrated embodiment, a rolling pattern 12a is formed on the inner circumferential surface of the rear barrel portion 12 of the terminal 1. The rolling pattern 12a is used to combine with the injection molding material entering the rear barrel portion 12 of the terminal 1, so as to increase the bonding force between the rear barrel portion 12 of the terminal 1 and the injection molding seal 2.

[0062] As Figures 1 to 12 shown, in the illustrated embodiment, a plurality of first positioning protrusions 11a and a plurality of second positioning protrusions 11b are formed on the inner circumferential surface of the front barrel portion 11 of the terminal 1. The plurality of first positioning protrusions 11a are spaced apart in the circumferential direction of the front barrel portion 11, and the plurality of second positioning protrusions 11b are spaced apart in the circumferential direction of the front barrel portion 11. The first positioning protrusion 11a and the second positioning protrusion 11b are spaced apart axially relative to each other in the front barrel portion 11 and are adapted to respectively abut against the front end and the rear end of the elastic contact member 4 inserted into the front barrel portion 11, so as to axially position the elastic contact member 4.

[0063] As Figures 1 to 12 shown, in the illustrated embodiment, a drain hole 11c is formed on the peripheral wall of the front barrel portion 11 of the terminal 1, so that the water entering the front barrel portion 11 of the terminal 1 can be discharged through the drain hole 11c.

[0064] As Figures 1 to 12 shown, in the illustrated embodiment, the cylindrical body 10 of the terminal 1 has a pair of side portions spliced together. A plurality of engaging grooves 10b are formed on one of the pair of side portions, and a plurality of engaging protrusions 10a are formed on the other. The plurality of engaging grooves 10b are spaced apart in the axial direction of the cylindrical body 10, and the plurality of engaging protrusions 10a are spaced apart in the axial direction of the cylindrical body 10 and respectively engage with the plurality of engaging grooves 10b, so as to splice the pair of side portions of the cylindrical body 10 together.

[0065] As Figures 1 to 12 shown, in the illustrated embodiment, the engaging groove 10b and the engaging protrusion 10a are in an Ω shape, a dovetail shape or other suitable shapes.

[0066] As Figures 1 to 12 shown, in the illustrated embodiment, the nickel plating layer 1a, the silver plating layer 1b and the tin plating layer 1c on the terminal 1 respectively have uniform thicknesses, and the thickness of the silver plating layer 1b is equal to the thickness of the tin plating layer 1c.

[0067] As Figures 1 to 12 shown, in another exemplary embodiment of the present invention, a terminal assembly is also disclosed. The terminal assembly includes: a terminal 1 and an injection molding seal 2. The terminal 1 is adapted to be inserted into a terminal jack of a housing (not shown) of an electrical connection device. The injection molding seal 2 is injection molded onto the rear barrel portion 12 of the terminal 1 for sealing the inner cavity of the rear barrel portion 12 and the terminal jack of the housing.

[0068] AsFigures 1 to 12 As shown, in the illustrated embodiment, the injection-molded seal 2 includes: an inner seal portion 21 and an outer seal portion 22. The inner seal portion 21 is located inside the rear barrel portion 12 of the terminal 1 and is used to seal the inner cavity of the rear barrel portion 12. The outer seal portion 22 is located outside the rear barrel portion 12 of the terminal 1 and is adapted to be squeezed between the rear barrel portion 12 and the inner wall of the terminal jack for sealing the terminal jack of the housing. The inner seal portion 21 is bonded to the tin plating 1c on the inner circumferential surface of the rear barrel portion 12, and the outer seal portion 22 is bonded to the tin plating 1c on the outer circumferential surface of the rear barrel portion 12.

[0069] As Figures 1 to 12 shown, in the illustrated embodiment, the injection-molded seal 2 can be formed of a silicone material or other suitable injection-molded material injection-molded onto the rear barrel portion 12 of the terminal 1.

[0070] As Figures 1 to 12 shown, in the illustrated embodiment, the terminal assembly further includes an elastic contact member 4. The elastic contact member 4 is inserted into the front barrel portion 11 of the terminal 1 and is in electrical contact with the silver plating 1b on the inner circumferential surface of the front barrel portion 11. The elastic contact member 4 is used to make electrical contact with a mating terminal inserted into the front barrel portion 11 of the terminal 1, so that the mating terminal can be electrically connected to the terminal 1 via the elastic contact member 4.

[0071] As Figures 1 to 12 shown, in the illustrated embodiment, the elastic contact member 4 includes: a pair of annular end portions 41, 42 and a plurality of elastic arm portions 40. The plurality of elastic arm portions 40 are connected between the pair of annular end portions 41, 42. The plurality of elastic arm portions 40 are spaced apart circumferentially on the annular end portions 41, 42 for making electrical contact with the outer circumferential surface of the inserted mating terminal.

[0072] As Figures 1 to 12 shown, in the illustrated embodiment, the elastic contact member 4 can be a copper component formed by integral stamping.

[0073] As Figures 1 to 12 shown, in the illustrated embodiment, the terminal assembly further includes a power transmission member 3. The conductor 30 of the power transmission member 3 is welded to the welding portion 13 of the terminal 1 to be electrically connected to the terminal 1.

[0074] As Figures 1 to 8 shown, in the illustrated embodiment, no other plating is formed on the nickel plating 1a in the welding area Z3 of the terminal 1. The conductor 30 of the power transmission member 3 is a copper conductor 30, and the copper conductor 30 is welded to the nickel plating 1a in the welding area Z3 of the terminal 1.

[0075] As Figures 9 to 11As shown, in the illustrated embodiment, a silver plating layer 1b is formed on the nickel plating layer 1a of the welding area Z3 of the terminal 1. The conductor 30 of the power transmission member 3 is an aluminum conductor 30, and the aluminum conductor 30 is welded to the silver plating layer 1b of the welding area Z3 of the terminal 1.

[0076] As Figures 1 to 12 shown, in the illustrated embodiment, the welding portion 13 of the terminal 1 is flat, the conductor 30 of the power transmission member 3 has a flat welding end 30a, and the flat welding end 30a of the power transmission member 3 is welded to the flat welding portion 13 of the terminal 1.

[0077] As Figures 1 to 12 shown, in another exemplary embodiment of the present utility model, an electrical connection device is also disclosed. The electrical connection device includes: a housing and a terminal assembly. A terminal jack is formed in the housing. The terminal assembly is inserted into the terminal jack of the housing. The terminal assembly is used to make electrical contact with the mating terminal of the electrical connection device inserted into the terminal jack to electrically connect the aforementioned electrical connection device and the mating electrical connection device.

[0078] As Figures 1 to 12 shown, in the illustrated embodiment, the electrical connection device is a charging base (not shown), and the mating electrical connection device is a charging gun (not shown) adapted to mate with the charging base. However, the present utility model is not limited to the illustrated embodiment. For example, the electrical connection device can be a charging gun, and the mating electrical connection device can be a charging base adapted to mate with the charging gun.

[0079] Those skilled in the art can understand that the above-described embodiments are all exemplary, and those skilled in the art can make improvements thereto. The structures described in various embodiments can be freely combined without conflict in terms of structure or principle, and these changes should reasonably fall within the protection scope of the present utility model.

[0080] Although the present utility model has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplarily illustrate the preferred embodiments of the present utility model and should not be construed as a limitation of the present utility model.

[0081] Although some embodiments of the general concept of the present utility model have been shown and described, those of ordinary skill in the art will understand that changes can be made to these embodiments without departing from the principles and spirit of the general concept of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

[0082] It should be noted that the term "comprising" does not exclude other elements or steps, and the term "a" or "an" does not exclude a plurality. In addition, any reference numeral of the claims should not be construed as limiting the scope of the present utility model.

Claims

1. A terminal, characterized in that, Comprising: A cylindrical body (10) including a front cylindrical portion (11) for mating with a mating terminal and a rear cylindrical portion (12) for bonding with an injection seal (2); and A welding portion (13) connected to the rear end of the cylindrical body (10) for welding to a conductor (30) of a power transmission member (3), The terminal (1) is an integrally stamped copper terminal and a nickel plating layer (1a) is formed on the entire terminal (1), and the nickel plating layer (1a) is the bottom plating layer of the terminal (1), The terminal (1) has a mating area (Z1) in the front cylindrical portion (11), an injection area (Z2) in the rear cylindrical portion (12), and a welding area (Z3) in the welding portion (13), A silver plating layer (1b) is formed on the nickel plating layer (1a) in the mating area (Z1) of the terminal (1), and a tin plating layer (1c) is formed on the nickel plating layer (1a) in the injection area (Z2) of the terminal (1).

2. The terminal according to claim 1, wherein: The tin plating layer (1c) on the injection area (Z2) of the terminal (1) is used to engage with an injection seal (2) injected onto the rear cylindrical portion (12) of the terminal (1) to increase the bonding force between the terminal (1) and the injection seal (2).

3. The terminal according to claim 1, wherein: The silver plating layer (1b) on the mating area (Z1) of the terminal (1) is used to make electrical contact with an elastic contact member (4) inserted into the front cylindrical portion (11) of the terminal (1) to improve the electrical contact performance between the terminal (1) and the elastic contact member (4).

4. The terminal according to claim 1, wherein: No other plating layer is formed on the nickel plating layer (1a) in the welding area (Z3) of the terminal (1); The conductor (30) of the power transmission member (3) is a copper conductor, and the copper conductor is welded to the nickel plating layer (1a) in the welding area (Z3) of the terminal (1).

5. The terminal according to claim 1, wherein: A silver plating layer (1b) is formed on the nickel plating layer (1a) in the welding area (Z3) of the terminal (1); The conductor (30) of the power transmission member (3) is an aluminum conductor, and the aluminum conductor is welded to the silver plating layer (1b) in the welding area (Z3) of the terminal (1).

6. The terminal according to claim 1, wherein: An opening (101) is formed in the rear cylindrical portion (12) of the terminal (1) to allow an injection material for forming the injection seal (2) to enter the inner cavity of the rear cylindrical portion (12) of the terminal (1) through the opening (101) and seal the inner cavity of the rear cylindrical portion (12).

7. The terminal body according to claim 6, wherein: The opening (101) is arc-shaped and extends circumferentially along the rear cylindrical portion (12), and a pair of the openings (101) are formed on the rear cylindrical portion (12), and the pair of openings (101) are spaced apart axially on the rear cylindrical portion (12); The rear cylinder part (12) has an arc-shaped bridge part (102) located between the pair of openings (101), and the arc-shaped bridge part (102) is used to be embedded into the injection molding seal (2) to be combined with the injection molding seal (2).

8. The terminal according to claim 6, wherein: On the inner circumferential surface of the rear cylinder part (12) of the terminal (1), rolling patterns (12a) are formed, and the rolling patterns (12a) are used to combine with the injection molding material entering the rear cylinder part (12) of the terminal (1) to increase the bonding force between the rear cylinder part (12) of the terminal (1) and the injection molding seal (2).

9. The terminal according to claim 3, wherein: On the inner circumferential surface of the front cylinder part (11) of the terminal (1), a plurality of first positioning protrusions (11a) and a plurality of second positioning protrusions (11b) are formed. The plurality of first positioning protrusions (11a) are spaced apart in the circumferential direction of the front cylinder part (11), and the plurality of second positioning protrusions (11b) are spaced apart in the circumferential direction of the front cylinder part (11); The first positioning protrusion (11a) and the second positioning protrusion (11b) are spaced apart axially and oppositely in the front cylinder part (11) and are adapted to respectively abut against the front end and the rear end of the elastic contact member (4) inserted into the front cylinder part (11) to axially position the elastic contact member (4).

10. The terminal according to claim 1, wherein: On the peripheral wall of the front cylinder part (11) of the terminal (1), a drain hole (11c) is formed so that the water entering the front cylinder part (11) of the terminal (1) can be discharged through the drain hole (11c).

11. The terminal according to claim 1, wherein: The cylindrical body (10) of the terminal (1) has a pair of side parts spliced together. On one of the pair of side parts, a plurality of engaging grooves (10b) are formed, and on the other, a plurality of engaging protrusions (10a) are formed; The plurality of engaging grooves (10b) are spaced apart in the axial direction of the cylindrical body (10), and the plurality of engaging protrusions (10a) are spaced apart in the axial direction of the cylindrical body (10) and are respectively engaged with the plurality of engaging grooves (10b) to splice the pair of side parts of the cylindrical body (10) together.

12. The terminal according to claim 11, wherein: The engaging groove (10b) and the engaging protrusion (10a) are in an Ω shape or a dovetail shape.

13. The terminal according to any one of claims 1-12, wherein: The nickel plating layer (1a), silver plating layer (1b), and tin plating layer (1c) on the terminal (1) respectively have uniform thicknesses, and the thickness of the silver plating layer (1b) is equal to the thickness of the tin plating layer (1c).

14. A terminal component, characterized in that, Comprising: The terminal (1) according to any one of claims 1-3, 6-13, which is adapted to be inserted into a terminal jack of a housing of an electrical connection device; And The injection-molded seal (2) is injection-molded onto the rear barrel portion (12) of the terminal (1) for sealing the inner cavity of the rear barrel portion (12) and the terminal jack.

15. The terminal assembly according to claim 14, wherein: The injection-molded seal (2) includes: An inner seal portion (21) located inside the rear barrel portion (12) of the terminal (1) for sealing the inner cavity of the rear barrel portion (12); and An outer seal portion (22) located outside the rear barrel portion (12) of the terminal (1) and adapted to be squeezed between the rear barrel portion (12) and the inner wall of the terminal jack for sealing the terminal jack, The inner seal portion (21) is bonded to the tin plating layer (1c) on the inner circumferential surface of the rear barrel portion (12), and the outer seal portion (22) is bonded to the tin plating layer (1c) on the outer circumferential surface of the rear barrel portion (12).

16. The terminal assembly according to claim 14, wherein: The injection-molded seal (2) is formed of a silicone material injection-molded onto the rear barrel portion (12) of the terminal (1).

17. The terminal component according to claim 14, wherein It further includes: An elastic contact member (4) inserted into the front barrel portion (11) of the terminal (1) and making electrical contact with the silver plating layer (1b) on the inner circumferential surface of the front barrel portion (11), The elastic contact member (4) is used to make electrical contact with a mating terminal inserted into the front barrel portion (11) of the terminal (1) so that the mating terminal can be electrically connected to the terminal (1) via the elastic contact member (4).

18. The terminal assembly according to claim 17, wherein: The elastic contact member (4) includes: A pair of annular ends (41, 42); and A plurality of elastic arm portions (40) connected between the pair of annular ends (41, 42), The plurality of elastic arm portions (40) are spaced apart circumferentially on the annular ends (41, 42) for making electrical contact with the outer circumferential surface of the inserted mating terminal.

19. The terminal assembly according to claim 18, wherein: The elastic contact member (4) is a one-piece stamping-formed copper component.

20. The terminal component according to claim 14, wherein It further includes: A power transmission member (3) whose conductor (30) is welded to the welding portion (13) of the terminal (1) to be electrically connected to the terminal (1).

21. The terminal assembly according to claim 20, wherein: No other plating layer is formed on the nickel plating layer (1a) in the welding area (Z3) of the terminal (1); The conductor (30) of the power transmission member (3) is a copper conductor (30), and the copper conductor (30) is welded to the nickel plating layer (1a) in the welding area (Z3) of the terminal (1).

22. The terminal assembly according to claim 20, wherein: A silver plating layer (1b) is formed on the nickel plating layer (1a) in the welding area (Z3) of the terminal (1); The conductor (30) of the power transmission member (3) is an aluminum conductor (30), and the aluminum conductor (30) is welded to the silver plating layer (1b) in the welding area (Z3) of the terminal (1).

23. The terminal assembly according to claim 20, wherein: The welding portion (13) of the terminal (1) is flat, the conductor (30) of the power transmission member (3) has a flat welding end (30a), and the flat welding end (30a) of the power transmission member (3) is welded to the flat welding portion (13) of the terminal (1).

24. An electrical connection device, characterized in that, Comprising: A housing formed with a terminal jack; And The terminal assembly according to any one of claims 14-23, inserted into the terminal jack, The terminal assembly is used for making electrical contact with a mating terminal of a power distribution connection device inserted into the terminal jack to electrically connect the electrical connection device and the power distribution connection device.

25. The electrical connection device according to claim 24, wherein: The electrical connection device is a charging base, and the power distribution connection device is a charging gun adapted to mate with the charging base; or The electrical connection device is a charging gun, and the power distribution connection device is a charging base adapted to mate with the charging gun.

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