Plate end contact element for electric connector and plate end connector

Abstract

The utility model relates to the technical field of electric connectors, and particularly discloses a plate end contact element for an electric connector and a plate end connector. Wherein the plate end contact piece is provided with a contact part and a pin part which are matched with each other through a bending structure; the contact part and the pin part of the plate end contact member are in a combined connection structure formed in a split manner. According to the utility model, the technical defects of bending part deformation and bending diameter requirements of a traditional integrated bending type plate end contact element are effectively eliminated, the bending structure is not limited by the diameter of the plate end contact element, and the bending structure which accords with the design size and is unified and normative can be obtained regardless of the diameter of the plate end contact element; and the quality of the finished product of the plate end contact element is improved, and the compactness and miniaturization of the whole structure are also facilitated.

Description

Technical Field

[0001] The utility model relates to an electric connector, in particular to a board end contact piece for the electric connector and a board end connector comprising the board end contact piece. Background Art

[0002] The interface electrical connector of the charging module is composed of a board-end connector and a line-end connector that are mated in a plug-in relationship.

[0003] The board-end connector comprises at least a mounting plate, a cover plate, and multiple sets of board-end contacts. Specifically, the cover plate is assembled to the rear side of the mounting plate (relative to the front end in the plug-in / unplug direction). Within the mounting plate and cover plate, multiple cavities for mounting the board-end contacts, as well as cavities for mounting signal contacts, are spaced apart along the length (with the plug-in / unplug direction as the front-to-back reference, with the length direction being the left-to-right horizontal direction relative to the front-to-back direction). In a working environment, a PCB is assembled to the bottom side of the mounting plate and cover plate. Pads are formed on the PCB, corresponding to the cavities of the board-end contacts and matching the solder pins of the corresponding board-end contacts. The board-end contact has a contact portion and a pin portion. The contact portion is installed in the corresponding board-end contact cavity of the mounting plate from back to front (i.e., the plug-in direction). The contact portion in the mounting plate (usually a pin structure) is used to plug and mate with the corresponding contact (usually a sleeve structure) of the line-end connector; the pin portion is in the board-end contact cavity of the cover plate, or in the board-end contact cavity between the cover plate and the mounting plate, and the solder foot at the bottom end of the pin portion is welded to the corresponding pad on the PCB board. Therefore, the board-end contact has a contact portion and a pin portion that are matched with a nearly 90° bend structure, that is, the pin portion of the board-end contact and the contact portion basically form a vertical matching relationship in the plug-in and pull-out direction.

[0004] For a long time, in order to improve the production efficiency and reduce the production cost of board-end contacts, the industry has been producing bent structure board-end contacts by first machining or cold heading a contact blank with a contact portion and a pin portion reserved in the axial direction, and then bending the integrally formed contact blank with a bending jig to obtain a finished product. In other words, the existing board-end contacts have a contact portion and a pin portion with an integrated bending structure, such as the technology disclosed in the Chinese patent document entitled "An Electrical Connector and Its Connector Housing", with publication number CN 105406267 B and publication date January 16, 2018. Figure 1 The structure shown.

[0005] Although the one-piece bent structure of the traditional plate-end contact has the technical characteristics of high production efficiency and low production cost, the applicant has found through repeated research that the one-piece bent plate-end contact has the following major technical problems:

[0006] First, the bending portion of the integral bending board terminal contact always has bending deformation, and this bending deformation becomes more obvious as the diameter of the board terminal contact increases, that is, the deformation of the bending portion of the board terminal contact is proportional to the diameter of the board terminal contact. As a result, the integral bending board terminal contact cannot obtain a relatively ideal, unified and standardized bending arc structure at the bending portion, resulting in that the structural dimensions of the contact portion and the pin portion are difficult to reliably guarantee, directly reducing the qualified rate of the finished product and also directly reducing the overall assembly accuracy in the assembly structure such as the mounting plate, ultimately reducing the quality of the finished board terminal connector and increasing the manufacturing cost of the finished board terminal connector.

[0007] Secondly, the bending radius of the integral bending board-end contact is proportional to the diameter of the board-end contact. When the diameter of the board-end contact is larger, the bending radius is also increased. Only a large bending radius can obtain a bending arc structure that meets technical requirements. However, this also increases the pin height and contact length of the board-end contact, making the overall molding structure of the board-end contact larger. As a component of the board-end connector, the board-end contact is obviously not conducive to the molding of a miniaturized board-end connector, which is also not conducive to the miniaturization of the entire electrical connector. It is difficult to meet the market's technical requirements for miniaturized electrical connectors and it is also difficult to control the manufacturing cost of the finished board-end connector.

[0008] Third, as the diameter of the integrated bent-type board-end contact increases, the diameter of the solder foot at the bottom of the pin portion also increases. This makes soldering between the pin portion and the PCB more difficult and increases the soldering time. This inevitably places higher technical requirements on the heat resistance of the relative housing structure, including the PCB, and makes it more difficult to control the manufacturing cost of the finished board-end connector.

[0009] Fourthly, when the diameter of the solder pin of the one-piece bent board-end contact increases, the large solder pin will lead to a larger weld scar, which will directly reduce the electrical safety distance between adjacent solder pins and reduce the quality of the finished board-end connector. It also reflects from another perspective that it is not conducive to the miniaturization of the overall structure of the board-end connector.

[0010] To sum up, the current technical logic of the one-piece bending forming of the board-end contacts is based on the long-term inertial production thinking of small-diameter (usually less than Φ5mm) board-end contacts required for single-pin low-current (usually 80A and below) working conditions. It is obviously not suitable for the structural forming of large-diameter board-end contacts required for the current single-pin high-current working environment, and technical improvements are needed. Utility Model Content

[0011] The technical purpose of the present utility model is to provide a board-end contact for an electrical connector that is not only conducive to improving the quality of the finished product, but also not limited by the diameter of the board-end contact and is conducive to compact and miniaturized structure, as well as a board-end connector including the board-end contact, in view of the particularity of the board-end connector of the above-mentioned electrical connector and the shortcomings of the existing technology.

[0012] The technical purpose of the present invention is achieved through the following technical solution: a board-end contact for an electrical connector, the board-end contact having a contact portion and a pin portion matched with a bending structure;

[0013] The contact portion and the pin portion of the board end contact piece are a separately formed combined connection structure.

[0014] The above technical measures are aimed at the particularity of the technical requirements of the board-end connector for the board-end contact. Without changing the premise that the contact portion and the pin portion of the board-end contact are matched with the bending structure, the contact portion and the pin portion constituting the board-end contact are combined into a whole with a separately formed combined connection structure, that is, the contact portion and the pin portion of the board-end contact are first separately formed, and then they are combined and connected into an integral structure, so that the bending structure of the board-end contact is still retained.

[0015] The above-described combined connection structure, formed by separately molding the contact portion and the pin portion, effectively eliminates the disadvantages of bending deformation and bending diameter requirements of the above-described integrated bending board-type terminal contacts. It is not limited by the diameter of the terminal contact and can be formed for small-diameter terminal contacts (i.e., single-pin current carrying capacity ≤80A, contact section outer diameter ≤5mm) required for single-pin low-current operating environments, or large-diameter terminal contacts (i.e., single-pin current carrying capacity >80A, contact section outer diameter >5mm) required for single-pin high-current operating environments. Regardless of the diameter of the terminal contact, a uniform bending structure that conforms to the designed dimensions can be achieved, which improves the quality of the finished terminal contact and facilitates overall compactness and miniaturization, especially for large-diameter terminal contacts required for single-pin high-current operating environments. Due to these technical advantages, terminal connectors using terminal contacts employing the above-described technical measures have high-quality finished products and facilitate compactness and miniaturization, thereby effectively controlling the manufacturing cost of the finished terminal connector while meeting technical requirements.

[0016] Furthermore, the aforementioned combined connection structure, where the contact portion and pin portion are separately molded, eliminates bending deformation of the contact portion, allowing the contact portion to be structured not just as a solid pin but also as a hollow sleeve. This means that board-side contacts can adopt the aforementioned combined connection structure but with a hollow sleeve forming the contact portion, breaking away from the long-standing limitation of solid pins for board-side contacts and thus flexibly adapting to market and technical requirements.

[0017] As one of the preferred technical solutions, the contact portion has an integrally formed contact section, a limiting section, and a contact side assembly section, the contact section being used to be plugged into and mated with a corresponding contact piece of the line-end connector, the contact side assembly section being used to be assembled and connected with the pin portion, the limiting section being located between the contact section and the contact side assembly section and being radially outwardly convex, and the limiting section being used to be assembled with the mounting plate of the board-end connector;

[0018] The pin portion comprises an integrally formed solder foot section, a transition section, and a pin side assembly section. The solder foot section is used to connect to the PCB board at the board end connector. The pin side assembly section is used to be assembled and connected to the contact portion. The transition section is located between the solder foot section and the pin side assembly section.

[0019] The pin portion is connected to the contact side assembly section of the contact portion through the pin side assembly section, and a bending structure is formed between the pin portion and the contact portion.

[0020] Furthermore, the contact side assembly section of the contact portion has a contact side joint surface in a planar structure for combining and connecting the pin portion, corresponding to the pin portion to be connected;

[0021] Correspondingly, the pin side assembly section of the pin portion has a pin side joint surface in a planar structure for combining and connecting the contact portion, corresponding to the contact portion to be connected;

[0022] The pin portion is connected to the corresponding contact side bonding surface of the contact portion through the pin side bonding surface combination, and a bending structure is formed between the pin portion and the contact portion.

[0023] The contact portion and the pin portion of the above technical measures are combined and connected together in a planar manner. The board-end contact piece as a whole not only ensures the reliability of the electrical connection, but also ensures the stability of the combined connection structure of the two, and is also conducive to the compactness and miniaturization of the overall structure.

[0024] Furthermore, the contact side assembly section of the contact portion is used to arrange the thickness direction of the pin portion, and is formed with multiple independent contact side bonding surfaces;

[0025] Correspondingly, there are multiple pin parts, and each pin part is connected to the corresponding contact side bonding surface at the contact side assembly section through a pin side bonding surface combination;

[0026] The outwardly extending portions of the pin portions connected to the contact side assembly section form a spacing fit in the thickness direction of the contact side assembly section.

[0027] The combined connection structure between the contact portion and the pin portion of the above-mentioned technical measures enables the pin portion to form a dispersed arrangement structure with a large number of pins. On the one hand, it effectively meets the technical requirements of single-pin high current carrying capacity. Specifically, the dispersed arrangement structure of the pin portion significantly increases the surface area of ​​the pin portion, allowing the skin effect of current transmission to be fully utilized. At the same time, it increases the number of contact points and soldering points between the pin portion and the PCB board. The increase in contact points creates multi-path transmission, and the increase in soldering points helps to increase the amount of tin and improve the conductivity. On the other hand, the dispersed arrangement of the pin portion forms multiple smaller diameter solder pins, which not only helps to reduce the technical difficulty of soldering between each solder pin and the PCB board, improve the efficiency of the soldering operation, effectively reduce the thermal impact on the relative shell structure including the PCB board, but also can ensure the electrical safety distance between the solder pins of adjacent board-end contacts with a compact structure, thereby improving the quality of the finished product of the miniaturized board-end connector. Therefore, while meeting the high current carrying capacity, it helps to effectively improve the quality of the finished board-end connector and control the manufacturing cost of the finished board-end connector.

[0028] Furthermore, the contact-side bonding surface of the contact portion and / or the pin-side bonding surface of the pin portion have an uneven patterned structure. This technical measure helps improve the bonding stability between the contact portion and the pin portion, increases the bonding surface between the two, and reduces the gap at the bonding surface that could cause warping and deformation. In particular, when the contact portion and the pin portion are connected using ultrasonic welding, the patterned structure on the bonding surface can ensure more complete and comprehensive melting of the ultrasonic weld, thereby reliably improving the quality of the ultrasonic weld.

[0029] As one preferred technical solution, the pin portion is combined and connected to the contact portion using a combination connection structure, including welding or riveting. This technical measure can effectively ensure the integrity of the combined connection between the contact portion and the pin portion, especially using ultrasonic welding, which is easy to implement and has a high-quality combined connection.

[0030] As one of the preferred technical solutions, the pin portion is a straight plate structure in which the solder foot section, transition section and pin side assembly section are arranged in the same direction;

[0031] Alternatively, the pin portion is a bent plate structure in which the solder foot section and the pin side assembly section are arranged in different directions and are bent at the transition section, and an obtuse angle is formed between the width center of the solder foot section and the axial center of the connected contact portion.

[0032] The pin portions of the above-mentioned different structural forms can effectively adapt to the different technical requirements of the market.

[0033] Furthermore, the solder foot section of the lead portion has multiple solder feet spaced apart in the width direction, with the gap between adjacent solder feet being wider than the thickness of the lead portion. This technical measure increases the fitting width between adjacent solder feet, which, on the one hand, facilitates mold formation of the lead portion and ensures the structural strength of the mold; on the other hand, facilitates the soldering operation between the solder feet and the PCB; and, on the other hand, increases the number of contact points and soldering points between the lead portion and the PCB. The increased number of contact points creates multipath current transmission, and the increased number of soldering points helps increase the amount of tin and improves electrical conductivity.

[0034] As one of the preferred technical solutions, the contact portion has a limiting surface with a planar structure at the top and / or bottom side of the contact side assembly section;

[0035] When the contact portion is assembled in the mounting plate of the board-end connector, the limiting surface of the contact-side assembly section cooperates with the limiting section to assemble and limit the contact portion in the mounting plate of the board-end connector.

[0036] The contact portion of the above technical measures, while satisfying the combined connection with the pin portion, forms a limiting structure that can be assembled with the mounting plate of the board-end connector, thereby helping to improve the assembly stability and accuracy of the board-end contact piece in the mounting plate of the board-end connector, and further helping to ensure the quality of the finished product of the molded board-end connector.

[0037] As one of the preferred technical solutions, the current carrying capacity of a single pin of the board-end contact is greater than 80A.

[0038] Furthermore, the outer diameter of the contact section of the board-end contact piece used for plugging into a mating wire-end connector is greater than 5 mm.

[0039] Compared with existing board-end contacts, the above technical measures have the technical characteristics of large single-needle current carrying capacity and large contact section outer diameter. The board-end contacts of the above combined connection structure can effectively adapt to the technical requirements of this working environment and have good targeting.

[0040] As one of the preferred technical solutions, the contact portion of the board-side contact is a pin structure. This technical measure adapts to the special structure of the contact member of the board-side connector of the electrical connector, which has long been a pin structure, and has good compatibility with other line-end connectors on the market.

[0041] A board-end connector includes a mounting plate and a cover plate;

[0042] In the mounting plate, a plurality of cavities for assembling the plate end contacts are arranged at intervals along the length direction;

[0043] The cover plate is assembled at the rear end of the mounting plate; a plurality of cavities for assembling board end contacts are arranged at intervals along the length direction in the cover plate, and the board end contact cavities on the cover plate correspond to the board end contact cavities on the mounting plate in a one-to-one matching relationship;

[0044] The board-end connector further comprises a plurality of groups of board-end contacts of the above structure;

[0045] Each group of board-end contacts is assembled in the corresponding board-end contact cavity formed by the mounting plate and the cover plate, and the contact portion of the board-end contact is located in the board-end contact cavity of the mounting plate, the pin portion of the board-end contact is located in the board-end contact cavity of the cover plate, and each solder foot of the board-end contact is respectively soldered to the corresponding pad of the PCB board.

[0046] The board-end connector with the above technical measures is based on a mature board-end connector shell structure and includes the board-end contact of the above-mentioned specific structure. Thus, without basically changing the shell structure, a board-end connector is formed that can include the technical advantages of the above-mentioned board-end contact. This is beneficial for the board-end connector to achieve a large current while being compact and miniaturized, and can effectively control the manufacturing cost of the finished board-end connector.

[0047] Furthermore, each plate-end contact piece cavity of the mounting plate is provided with a limiting retaining wall for allowing the contact portion of the corresponding plate-end contact piece to pass forward;

[0048] When the board end contact is assembled in the corresponding board end contact cavity of the mounting plate, the limiting section of the contact portion abuts against the rear side of the limiting retaining wall;

[0049] Moreover, at the rear side of the limiting retaining wall of the mounting plate, corresponding to the limiting surface at the top and / or bottom side of the contact side assembly section of the contact part, there are limiting columns arranged at the upper and / or lower sides, and the limiting columns are limitedly matched with the corresponding limiting surfaces of the contact part in a planar structure.

[0050] The matching structure of the mounting plate and the board-end contact of the above technical measures can effectively improve the assembly stability and accuracy of the board-end contact in the mounting plate, thereby facilitating the quality of the finished product of the molded board-end connector.

[0051] The beneficial technical effect of the present invention is that the above technical measures, without changing the coordination of the contact portion and the pin portion of the board end contact with the bending structure, form the contact portion and the pin portion of the board end contact into a whole with a separately formed combined connection structure, effectively eliminating the technical disadvantages of the deformation of the bending portion and the bending diameter requirement of the traditional one-piece bending board end contact, and is not limited to the diameter of the board end contact. It can be a structural forming of a small-diameter board end contact required for a single-pin low-current working environment, or a structural forming of a large-diameter board end contact required for a single-pin high-current working environment. Regardless of whether the diameter of the board end contact is large or small, a bending structure that meets the design size and unified specifications can be obtained, which is beneficial to improving the quality of the finished product of the board end contact and is also beneficial to the compactness and miniaturization of the overall structure. The preferred ultrasonic welding structure of the combined connection structure between the contact portion and the pin portion of the board-side contact can effectively improve the integrity of the combined connection between the two. The preferred structure of the pin portion is dispersed in a large number. On the one hand, it effectively meets the technical requirements of a single pin with a large current carrying capacity. On the other hand, the dispersed arrangement of the pin portions facilitates welding between the solder pins and the PCB board, and can improve the quality of the finished miniaturized board-side connector with a compact structure. The board-side connector including the above-mentioned board-side contact has a high-quality finished product and is conducive to compactness and miniaturization. Therefore, while meeting technical requirements, it also helps to effectively control the manufacturing cost of the finished board-side connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a structural schematic diagram of the board end contact piece of the present utility model.

[0053] Figure 2 for Figure 1 Front view of the board end contact shown.

[0054] Figure 3 for Figure 2 Left view of .

[0055] Figure 4 for Figure 1 Schematic diagram of the contact structure.

[0056] Figure 5 for Figure 1 Schematic diagram of the pin structure.

[0057] Figure 6 for Figure 5 rear view.

[0058] Figure 7 The figure is a schematic diagram of an exploded structure of an electrical connector including the board-end connector of the utility model.

[0059] Figure 8 for Figure 7 A schematic diagram of the vertical cross-section structure of the electrical connector shown.

[0060] Figure 9 for Figure 7 Schematic diagram of the exploded structure of the board-end connector after removing the PCB board.

[0061] Figure 10 for Figure 9 A partial enlarged view of the mounting plate at the rear side of the plate end contact cavity.

[0062] Figure 11 for Figure 9 A partial enlarged view of the assembly structure of the mounting plate and the plate end contact.

[0063] Figure 12 This is another structural schematic diagram of the board end contact of the present utility model.

[0064] Figure 13 This is another structural schematic diagram of the board end contact of the present utility model.

[0065] Figure 14 for Figure 13 Schematic diagram of the cross-sectional structure of the board end contact shown.

[0066] The meaning of the codes in the figure are: 1—contact part; 11—contact section; 12—limiting section; 13—contact side assembly section; 14—contact side joint surface; 15—limiting surface; 2—pin part; 21—solder foot section; 22—transition section; 23—pin side assembly section; 24—pin side joint surface; 25—solder foot; 3—mounting plate; 31—limiting retaining wall; 32—limiting column; 4—cover plate; 5—PCB board; A—board-end connector; B—line-end connector. DETAILED DESCRIPTION

[0067] The present invention relates to an electrical connector, specifically a board-end contact for an electrical connector, and a board-end connector including the board-end contact. The following describes the main technical solution of the present invention in detail with reference to a plurality of embodiments. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 , Figure 10 and Figure 11 The technical solution of the utility model is clearly and in detail explained; Example 2 is combined with the accompanying drawings of the specification - that is Figure 12 The technical solution of the utility model is clearly and in detail explained; Example 3 is combined with the accompanying drawings of the specification - that is Figure 13 and Figure 14The technical solution of the present invention is clearly and in detail explained; although other embodiments are not separately drawn with drawings, their main structures can still refer to the drawings of embodiment 1, embodiment 2 or embodiment 3.

[0068] It should be noted that the drawings of the present invention are schematic and have been simplified to clarify the technical objectives of the present invention, without necessarily obscuring the technical contribution of the present invention over the prior art. Furthermore, expressions such as "approximately" and "substantially" regarding quantities or fitting relationships below are intended to allow for reasonable assembly and processing errors within the industry, and do not literally represent absolute quantities or fitting relationships.

[0069] Example 1

[0070] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the present invention is a board-end contact for an electrical connector, which has a separately formed contact portion 1 and a pin portion 2, which form a bending fitting relationship in a combined connection structure to match the technical requirements of the board-end connector.

[0071] Specifically, such as Figure 4As shown, the contact portion 1 is a solid pin structure. It comprises an integrally formed, axially mating contact segment 11, a retaining segment 12, and a contact-side assembly segment 13. The contact segment 11 is used to mate with the corresponding sleeve contact of the line-end connector. The front end of the contact segment 11 (i.e., the end that first makes contact during plugging and unplugging in an operating environment) has a chamfered structure that resembles a spherical crown surface, facilitating smooth guidance of the contact segment 11 within the corresponding sleeve contact during plugging and unplugging. The contact side assembly section 13 is used for combined connection with the pin portion 2. In order to ensure the stability of the combined connection with the pin portion 2 and improve the electrical connection performance, contact side bonding surfaces 14 with a planar structure for combined connection with the corresponding pin portion 2 are respectively formed on the left and right sides of the contact side assembly section 13 (i.e., the thickness direction; with the plug-in direction as the front-to-back reference, the left and right sides or the thickness direction of the contact side assembly section 13 refers to the left and right lateral directions relative to the front-to-back directions). The contact side bonding surfaces 14 on the left and right sides of the contact side assembly section 13 are arranged back to back. That is to say, the contact side assembly section 13 is used to arrange the pin portion 2 in the thickness direction (i.e., the distance between the left and right sides of the contact side assembly section 13), and two independent contact side bonding surfaces 14 are formed. The limiting section 12 is located between the contact section 11 and the contact side assembly section 13 and is radially convex. The limiting section 12 is used to be assembled with the mounting plate of the board-end connector. In order to ensure the assembly limit of the limiting section 12 in the mounting plate of the board-end connector, the step formed by the radial protrusion of the limiting section 12 from the contact section 11 forms an axial limiting surface, and the step formed by the radial protrusion of the limiting section 12 from the contact side assembly section 13 forms a limiting surface of the pin portion 2; of course, at the top and bottom sides of the aforementioned contact side assembly section 13 (with the plug-in and pull-out direction as the front-to-back reference, the top and bottom sides refer to the corresponding parts in the height direction, that is, the height direction of the bending of the pin portion), there are respectively planar structured limiting surfaces 15 that pass through the limiting section 12.

[0072] as Figure 1 and Figure 3 As shown, in order to correspond to the contact side joint surfaces 14 on the left and right sides of the contact side assembly section 13 of the above-mentioned contact portion 1, and to adapt to the technical requirements of the large current-carrying working environment, the pin portion 2 is two independent pieces, and the structures of the two pin portions 2 are basically the same.

[0073] as Figure 5 and Figure 6As shown, each pin portion 2 comprises an integrally formed solder foot section 21, a transition section 22, and a pin-side assembly section 23. The pin portion 2 is a straight board structure with the solder foot section 21, transition section 22, and pin-side assembly section 23 arranged in the same direction. The solder foot section 21 is used to connect to the PCB at the board-side connector. Therefore, the solder foot section 21 has multiple solder feet 25 spaced apart in the width direction (corresponding to the axial direction of the contact portion 1). The pin-side assembly section 23 is used for assembly connection with the contact-side assembly section 13 of the contact portion 1. The pin-side assembly section 23 of the pin portion 2 corresponds to the contact-side assembly section 13 of the contact portion 1 to be connected and has a planar pin-side mating surface 24. To facilitate assembly connection and enhance the stability of the assembly connection, a convex-concave pattern is embossed on the pin-side mating surface 24 of the pin-side assembly section 23. This pattern can be oriented in any direction or shape. The transition section 22 is located between the solder foot section 21 and the pin side assembly section 23 so that the solder foot 25 is formed below the contact portion 1 (relative to the height direction of the bent pin portion) to meet the technical requirements of the board-end connector.

[0074] In the molded structure of each lead portion 2, the transverse cross-section (relative to the axial direction of the solder leg 25) of the solder leg 25 is determined by the design requirements of the PCB pad and can be rectangular or circular. However, to facilitate mold formation and ensure mold structural strength, as well as to enhance soldering operability to the PCB, the gap between adjacent solder legs 25 on the solder leg section 21 is preferably formed to a width greater than the thickness of the main body of the lead portion 2 (referring to the transition section 22 and the lead-side assembly section 23).

[0075] as Figure 1 、 Figure 2 and Figure 3 As shown, the two pin portions 2 are ultrasonically welded to the corresponding contact-side bonding surfaces 14 of the contact-side assembly section 13 via their respective pin-side bonding surfaces 24. The two pin portions 2 are spaced apart on the left and right sides of the contact-side assembly section 13 of the contact portion 1, forming a substantially symmetrical arrangement. The combined connection of the two pin portions 2 on the contact portion 1 is positioned and limited by the contact portion 1's limiting section 12 via the rear (relative to the insertion and removal direction) limiting surfaces (i.e., the portions protruding from the contact-side bonding surfaces 14). In other words, the pin portions 2 are positioned and located on the contact portion 1 via the front and rear contour edges (i.e., the width of the pin portions 2) of the pin-side assembly section 23 and the inner pin-side bonding surfaces 24.

[0076] Because the pin-side assembly section 23 of each pin portion 2 is assembled and connected to the corresponding contact-side mating surface 14 of the contact-side assembly section 13 via the pin-side mating surface 24, the solder leg section 21, which is supported by the transition section 22 of the pin portion 2, is located below the contact-side assembly section 13. That is, the transition section 22 and solder leg section 21 of the pin portion 2 extend outward from below the contact-side assembly section 13, so that the outwardly extending portions of the two pin portions 2 form a spacing match in the thickness direction of the contact-side assembly section 13. In other words, the outwardly extending portions of the two pin portions 2 connected at the contact-side assembly section 13 form a spacing match in the thickness direction of the contact-side assembly section 13. The assembled connection structure between the contact portion 1 and the two pin portions 2 intuitively shows that, although they are formed separately, the overall structure formed by ultrasonic welding still maintains a nearly 90° bend fit. That is, a bend structure is formed between the assembled pin portions 2 and the contact portion 1, and the arrangement direction of the pin portions 2 is perpendicular to the insertion and removal direction of the contact portion 1.

[0077] This combined connection structure not only maintains the L-shaped bending technical requirements of the board-side connector for the board-side contact, but also enables the pin portion 2 to form a dispersed arrangement structure on the contact portion 1, effectively increasing the surface area of ​​the pin portion and fully utilizing the skin effect of current transmission. At the same time, the molding structure of the solder legs 25 at the bottom of the pin portion 2 effectively increases the contact points and soldering points between the pin portion 2 and the PCB board of the board-side connector. The increase in contact points creates multi-path current transmission, and the increase in soldering points helps increase the amount of tin and improve conductivity. Therefore, in addition to forming the current single-pin low-current carrying structure, the board-side contact with the above structure can also form a single-pin high-current carrying structure to meet the technical needs of the market (i.e., single-pin current carrying >80A, contact section 11 outer diameter >5mm, depending on design requirements and not fixed value). The technical advantages of the board-side contact with the above structure are particularly prominent in the single-pin high-current carrying structure.

[0078] See also Figure 7 、 Figure 8 、 Figure 9 , Figure 10 and Figure 11 As shown, the board-end connector including the above-mentioned board-end contact includes a mounting plate 3 and a cover plate 4.

[0079] Multiple cavities for assembling board-end contacts are spaced apart within the mounting plate 3 along the lengthwise direction (the lengthwise direction being the left-right lateral direction relative to the front-to-back direction, with the plugging and unplugging direction as the front-to-back reference). Within each board-end contact cavity of the mounting plate 3, there is a retaining wall 31 through which the contact portion 2 of the corresponding board-end contact can pass forward (i.e., in the forward insertion direction of the plugging and unplugging direction). The retaining wall 31, where the perforation is located, has retaining surfaces 15 at the top and bottom sides of the contact-side assembly section 13 of the contact portion 1 (corresponding to the height direction of the board-end connector, i.e., the bending direction of the pin portion of the board-end contact, with the direction of connection to the PCB as the bottom and the opposite direction as the top). Retaining posts 32 are arranged at the upper and lower sides (corresponding to the height direction of the board-end connector, with the direction of connection to the PCB as the bottom and the opposite direction as the top), respectively. The upper side limiter 32 has no other requirements except that its bottom surface (corresponding to the height of the board-side connector and the surface that mates with the board-side contact) must be a flat surface. The lower side limiter 32, in addition to its top surface (corresponding to the height of the board-side connector and the surface that mates with the board-side contact), is also required to have both its left and right side walls (corresponding to the length of the board-side connector) be flat surfaces. Specifically, the left and right widths of the lower side limiter 32 (corresponding to the length of the board-side connector) must match the spacing between the left and right pin portions 2 of the board-side contact.

[0080] The cover plate 4 is assembled at the rear end of the mounting plate 3. Within the cover plate 4, multiple cavities for assembling board-end contacts are spaced apart along the length. The board-end contact cavities on the cover plate 4 correspond one-to-one with the board-end contact cavities on the mounting plate 3. These two corresponding board-end contact cavities combine to form a cavity that can accommodate the corresponding board-end contacts.

[0081] The working environment PCB board 5 is assembled at the bottom of the cover plate 4 and the mounting plate 3. On the PCB board 5, there are formed solder pads corresponding to the cavities of each board end contact and matching the solder feet 25 of the corresponding board end contact.

[0082] Each board-end contact of the above structure corresponds to and is assembled within the board-end contact cavities between the mounting plate 3 and the cover plate 4. Specifically, each set of board-end contacts is assembled within the corresponding board-end contact cavity formed by the mounting plate 3 and the cover plate 4. The contact portion 1 of the board-end contact is located within the board-end contact cavity of the mounting plate 3, and the pin portion 2 of the board-end contact is located within the board-end contact cavity of the cover plate 4. The solder legs 25 of the board-end contacts are soldered to corresponding pads on the PCB 5. In the installation structure of the plate-end contact piece in the corresponding end contact piece cavity of the mounting plate 3, the limiting section 12 of the contact portion 1 abuts against the rear side of the limiting retaining wall 31 as much as possible, that is, the axial limiting surface formed by the limiting section 12 protruding from the contact section 11 abuts against the rear side of the limiting retaining wall 31 of the mounting plate 3 as much as possible, forming an axial forward limit of the contact portion 1; the two pin portions 2 of the plate-end contact piece form an inverted U-shaped straddling groove from the contact portion 1, straddling the lower side limiting column 32 on the rear side of the limiting retaining wall 31, so that the bottom of the contact side assembly section 13 of the contact portion 1 The limiting surface 15 is located on the top surface of the lower side limiting column 32, and the inner wall surfaces of the two pin parts 2 are basically in surface contact (there is a reasonable assembly gap) with the left and right wall surfaces of the lower side limiting column 32, so that the lower side limiting column 32 forms a stable limit for the board end contact in the downward and left and right directions; the limiting surface 15 on the top of the contact side assembly section 13 of the contact part 1 is basically in surface contact (there is a reasonable assembly gap) with the bottom surface of the upper side limiting column 32 above, so that the upper side limiting column 32 forms a stable upward limit for the board end contact. According to the assembly structure of the board end contact in the shell composed of the mounting plate 3, the cover plate 4 and the PCB board 5, in addition to forming an axial limit (i.e., the front and rear direction of plugging and unplugging) in the shell, the board end contact also forms a limit in the Y direction (height direction) and the X direction (length direction - i.e., left and right direction) of the height plane, as shown in FIG. Figure 10 shown.

[0083] The board-side connector A of the above structure mates with the line-side connector B during use. Line-side connector B can adopt a conventional structure without any restrictions. In the molding structure of the above-mentioned board-side connector A, except for the composition structure of the internal board-side contacts and the assembly structure with the housing, the outer contour structure of the board-side connector A is the same as that of a conventional one, and a corresponding design of a conventional structure can be installed.

[0084] Example 2

[0085] The rest of this embodiment is the same as that of embodiment 1, except that:

[0086] like Figure 12As shown, the pin portion 2 is a pin-side assembly section 23 arranged in opposite directions, and a bent plate structure is formed at the transition section 22 that is bent backward (i.e., relative to the front and rear directions of plugging and unplugging) to adapt to different layout structures of the PCB board of the board-end connector, so that the width center of the solder foot section 21 and the axial center of the connected contact portion 1 form an obtuse angle matching relationship.

[0087] Example 3

[0088] The rest of this embodiment is the same as that of embodiment 1, except that:

[0089] like Figure 13 As shown, the pin portion 2 is riveted to the contact portion 1. Of course, both ends of the rivet should be within the radially outward convex coverage of the limiting section 12 of the contact portion 1.

[0090] Example 4

[0091] The rest of this embodiment is the same as that of embodiment 1, except that:

[0092] The contact side bonding surface of the contact portion has an uneven pattern structure, and the pin side bonding surface of the pin portion has a smooth surface structure.

[0093] Example 5

[0094] The rest of this embodiment is the same as that of embodiment 1, except that:

[0095] The contact side joint surface of the contact portion also has an uneven pattern structure.

[0096] Example 6

[0097] The rest of this embodiment is the same as that of embodiment 1, except that:

[0098] On the contact side assembly section of the contact part, four bonding surfaces are opened along the thickness direction. Except for the two outermost bonding surfaces on the left and right sides that act independently, the two middle bonding surfaces form a U-shaped groove. The two bonding surfaces forming the U-shaped groove are used to connect the same pin part.

[0099] In this way, the contact-side assembly section of the contact portion is connected to three pin portions arranged at intervals.

[0100] Example 7

[0101] The rest of this embodiment is the same as that of embodiment 1, except that:

[0102] The contact side assembly section of the contact portion has only a single, vertically arranged bonding surface, and the bonding surface is connected to a single pin portion.

[0103] As a possible variation of this embodiment, the mating surface of the contact-side assembly section of the contact portion is formed at the bottom of the contact-side assembly section, and the pin portion is assembled and connected with the top forming the mating surface. Of course, in this variation, the pin portion connected to the bottom of the contact portion will cause positional interference with the lower side limit post on the board-end connector mounting plate, so the lower side limit post on the mounting plate must be removed.

[0104] Example 8

[0105] The rest of the contents of this embodiment are the same as those of any one of Embodiments 1 to 7, except that:

[0106] The contact portion is a hollow insert structure. Since the contact portion needs to form a combined connection with the pin portion, the hollow structure within the contact portion should not extend into the contact-side assembly section of the contact portion. In other words, the contact section and the retaining section of the contact portion are hollow structures (at least within the contact section), while the contact-side assembly section is a solid structure to facilitate the molding of the connection structure of the pin portion.

[0107] Correspondingly, the wire-end connector that mates with the board-end connector uses contacts with a pin structure.

[0108] The above embodiments are only used to illustrate the present invention, rather than to limit it.

[0109] Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the above embodiments or make equivalent replacements for some of the technical features therein, such as achieving a combined connection between the pin portion and the contact portion by screw locking, etc.; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the present invention.

Claims

1. A board-end contact for an electrical connector, the board-end contact comprising a contact portion (1) and a pin portion (2) matched in a bent structure; Its characteristics are: The contact portion (1) and the pin portion (2) of the board end contact piece are a separately formed combined connection structure.

2. The board terminal contact for an electrical connector according to claim 1, wherein: The contact portion (1) comprises an integrally formed contact section (11), a limiting section (12) and a contact side assembly section (13); the contact section (11) is used for plugging and mating with a corresponding contact piece of the line-end connector (B); the contact side assembly section (13) is used for assembly connection with the pin portion (2); the limiting section (12) is located between the contact section (11) and the contact side assembly section (13) and is radially outwardly convex; the limiting section (12) is used for assembly with the mounting plate (3) of the board-end connector (A); The pin portion (2) has an integrally formed solder foot section (21), a transition section (22), and a pin side assembly section (23); the solder foot section (21) is used to connect to the PCB board (5) at the board end connector (A); the pin side assembly section (23) is used to be combined and connected with the contact portion (1); and the transition section (22) is located between the solder foot section (21) and the pin side assembly section (23); The pin portion (2) is assembled and connected to the contact side assembly section (13) of the contact portion (1) through the pin side assembly section (23), and a bending structure is formed between the pin portion (2) and the contact portion (1).

3. The board terminal contact for an electrical connector according to claim 2, wherein: The contact side assembly section (13) of the contact portion (1) corresponds to the pin portion (2) to be connected and has a contact side joint surface (14) in a planar structure for combining and connecting the pin portion (2); Correspondingly, the pin side assembly section (23) of the pin portion (2) corresponds to the contact portion (1) to be connected and has a pin side joint surface (24) in a planar structure for combining and connecting the contact portion (1); The pin portion (2) is combinedly connected to the corresponding contact side bonding surface (14) of the contact portion (1) via the pin side bonding surface (24), and a bending structure is formed between the pin portion (2) and the contact portion (1).

4. The board terminal contact for an electrical connector according to claim 3, wherein: The contact side assembly section (13) of the contact portion (1) is used for arranging the pin portion (2) in a thickness direction, and is formed with a plurality of mutually independent contact side bonding surfaces (14); Correspondingly, there are a plurality of pin portions (2), and each pin portion (2) is combined and connected to a corresponding contact side bonding surface (14) at the contact side assembly section (13) via a pin side bonding surface (24); The outwardly extending portions of each pin portion (2) connected at the contact side assembly section (13) form a spacing fit in the thickness direction of the contact side assembly section (13).

5. The board terminal contact for an electrical connector according to claim 3 or 4, characterized in that: The contact side bonding surface (14) of the contact portion (1) and / or the pin side bonding surface (24) of the pin portion (2) have an uneven pattern structure.

6. The board terminal contact for an electrical connector according to claim 1, 2, 3 or 4, characterized in that: The pin portion (2) is combined and connected to the contact portion (1) in a combined connection structure including a welding method or a riveting method.

7. The board terminal contact for an electrical connector according to claim 2, wherein: The pin portion (2) is a straight plate structure in which the solder foot section (21), the transition section (22) and the pin side assembly section (23) are arranged in the same direction; Alternatively, the pin portion (2) is a bent plate structure in which the solder foot section (21) and the pin side assembly section (23) are arranged in different directions and a bend is formed at the transition section (22), and an obtuse angle fit is formed between the width center of the solder foot section (21) and the axial center of the connected contact portion (1).

8. The board terminal contact for an electrical connector according to claim 2 or 7, characterized in that: The solder foot section (21) of the pin portion (2) has a plurality of solder feet (25) arranged at intervals in the width direction, and the width of the gap between adjacent solder feet (25) is greater than the thickness of the pin portion (2).

9. The board terminal contact for an electrical connector according to claim 2, 3 or 4, characterized in that: The contact side assembly section (13) of the contact portion (1) has a limiting surface (15) with a planar structure at the top side and / or bottom side; When the contact portion (1) is assembled in the mounting plate (3) of the board-end connector (A), the limiting surface (15) of the contact-side assembly section (13) cooperates with the limiting section (12) to assemble and limit the contact portion (1) in the mounting plate (3) of the board-end connector (A).

10. The board terminal contact for an electrical connector according to claim 1, characterized in that: The single pin current carrying capacity of the board terminal contact is greater than 80A.

11. The board terminal contact for an electrical connector according to claim 10, characterized in that: The board-end contact piece is used as a contact section (11) of a plug-in mating line-end connector (B) with an outer diameter greater than 5 mm.

12. The board terminal contact for an electrical connector according to claim 1, 2 or 10, characterized in that: The contact portion (1) of the board end contact piece is a pin structure.

13. A board-end connector, comprising a mounting plate (3) and a cover plate (4); In the mounting plate (3), a plurality of cavities for assembling plate end contacts are arranged at intervals along the length direction; The cover plate (4) is assembled at the rear end of the mounting plate (3); a plurality of cavities for assembling board end contacts are arranged at intervals along the length direction in the cover plate (4), and the board end contact cavities on the cover plate (4) and the board end contact cavities on the mounting plate (3) are in a one-to-one matching relationship; Its characteristics are: The board-end connector (A) further comprises a plurality of groups of board-end contacts according to any one of claims 1 to 12; Each group of board-end contacts is assembled in a corresponding board-end contact cavity formed by the mounting plate (3) and the cover plate (4), and the contact portion (1) of the board-end contact is located in the board-end contact cavity of the mounting plate (3), the pin portion (2) of the board-end contact is located in the board-end contact cavity of the cover plate (4), and each solder leg (25) of the board-end contact is respectively soldered to a corresponding solder pad on the PCB board (5).

14. The board-end connector according to claim 13, characterized in that: Each plate end contact piece cavity of the mounting plate (3) is provided with a limiting retaining wall (31) through which the contact portion (2) of the corresponding plate end contact piece can pass forward; When the plate end contact is assembled in the corresponding plate end contact cavity of the mounting plate (3), the limiting section (12) of the contact portion (1) abuts against the rear side of the limiting retaining wall (31); Furthermore, at the rear side of the limiting retaining wall (31) of the mounting plate (3), corresponding to the limiting surface (15) at the top side and / or bottom side of the contact side assembly section (13) of the contact portion (1), there are limiting columns (32) arranged at the upper side and / or lower side, and the limiting columns (32) are limitedly matched with the corresponding limiting surface (15) of the contact portion (1) in a planar structure.

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