Electric connection structure and electric connector combination

Abstract

The utility model discloses an electric connection structure and an electric connector combination, the electric connection structure comprises a signal terminal and a jack terminal which are in plugging cooperation, and the signal terminal is provided with a main body part and a plug part which are formed by stamping and curling. The plug part is inserted into the butt joint part which is formed by stamping and curling the jack terminal to form electrical contact, so that abrupt change of characteristic impedance caused by additional increase of the overall outer diameter of a butt joint area is avoided, and impedance matching is ensured to improve high-frequency transmission performance. The signal terminal is provided with two elastic arms which abut against the same conductive pad together to form double conductive paths, so that the signal transmission rate is improved.

Description

Technical field

[0001] The utility model relates to an electrical connection structure and an electrical connector combination, in particular to an electrical connection structure and an electrical connector combination for transmitting high-speed signals. [Background Technology]

[0002] The existing backplane connector combination includes multiple signal terminals for transmitting high-speed signals and multiple docking terminals, all of which are stamped and bent from metal plates and docked with each other to form an electrical connection. Each of the signal terminals includes a flat main body and a flat contact portion. An abutment arm extends from one end of the main body to elastically abut against a circuit board. Each of the docking terminals is provided with a plate-shaped connecting portion and a docking arm bent from the connecting portion. The docking arm elastically abuts against the contact portion along the plate thickness direction. However, on the one hand, the elastic abutment between the docking arm and the contact portion causes the two to overlap along the plate thickness direction, causing the thickness of the docking area to suddenly increase and be greater than the thickness of the docking terminal and the rest of the signal terminal. Due to the sudden increase in the thickness of the docking area between the contact portion and the docking terminal, the inductance of the docking area is smaller than the inductance of the main body and the inductance of the connecting portion, which in turn causes the characteristic impedance of the docking area to be lower than the characteristic impedance of the main body and the characteristic impedance of the connecting portion, which easily causes the impedance to suddenly change in the docking area, resulting in poor high-frequency transmission performance of the electrical connector combination. On the other hand, since the extension arm extends directly from the main body to abut against the circuit board, the elastic performance of the extension arm is poor, and elastic fatigue is likely to occur during use. In addition, each signal terminal has only one extension arm that is electrically connected to the circuit board, the conductive path is relatively simple, and the transmission rate of the signal terminal is poor.

[0003] Therefore, it is necessary to design an improved electrical connection structure and electrical connector combination to solve the above technical problems. [Utility Model Content]

[0004] In response to the problems of the background technology, the purpose of the present invention is to provide a signal terminal that is inserted into the curled mating portion of the jack terminal through a curled plug portion to form an electrical connection, thereby avoiding an additional increase in the overall outer diameter of the mating area that causes a sharp change in the characteristic impedance, ensuring impedance matching between the signal terminal and the jack terminal to improve high-frequency transmission performance, and the signal terminal is provided with two elastic arms that jointly abut the same conductive pad to form an electrical connection structure and an electrical connector combination with dual conductive paths.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: an electrical connection structure, comprising a signal terminal and a socket terminal for plug-matching, characterized in that: the signal terminal comprises a main body, a plug portion extends from one end of the main body, the main body and the plug portion are both formed by stamping and curling, the outer diameter of the plug portion is smaller than the outer diameter of the main body, and two elastic arms are provided at the other end of the main body, each of the elastic arms comprises an extension arm extending in a direction away from each other and an abutting arm bent in the opposite direction from the extension arm, and the two abutting arms abut against the same conductive pad of a circuit board; the socket terminal has a connecting portion and a docking portion, the docking portion and the connecting portion are connected and are both formed by stamping and curling, and the docking portion is open at one end away from the connecting portion for the plug portion to be inserted; when the signal terminal is docked with the socket terminal, the plug portion is inserted into the docking portion and forms an electrical connection with the docking portion.

[0006] Furthermore, the outer diameter of the connecting portion is equal to the outer diameter of the main body portion.

[0007] Furthermore, the docking portion includes two docking arms extending from the connecting portion and arranged opposite to each other, the cross-sections of the two docking arms are arc-shaped, the edges of the two docking arms are spaced apart from each other, and the two docking arms form an insertion cavity for the plug portion to be inserted, each of the docking arms has an extension section extending from the connecting portion and a docking section formed by bending inward and extending from the extension section to abut against the plug portion, and a guide section is formed by extending from the two docking sections in a direction away from each other to guide the plug portion to be inserted into the docking portion, and the outer diameter of the docking portion corresponding to the position of the docking section is less than or equal to the outer diameter of the connecting portion and the outer diameter of the main body portion.

[0008] Furthermore, the socket terminal is formed by stamping and curling two second stamping parts so that the cross section of the socket terminal is formed by splicing two semicircular arcs, the two second stamping parts are welded and fixed at the connecting part, and the two second stamping parts have two oppositely arranged slits at the docking part.

[0009] Furthermore, the signal terminal extends in the front-to-back direction, and the signal terminal is composed of two first stamping parts with the same structure that are relatively assembled in the up-down direction to form the cylindrical plug part and the main body part. The two first stamping parts are welded and fixed at the main body part, and the two elastic arms are respectively located at the rear sections of the two first stamping parts and are formed by stamping and bending.

[0010] Furthermore, when viewed from left to right, the projections of the two first stamping parts are symmetrically arranged along their center lines, and the two elastic arms each include a flat plate section connected to the extension arm and a transition section extending from one end of the flat plate section in the front-to-back direction and connected to the main body. In the up-down direction, the distance between the two opposing surfaces of the flat plate section is equal to the outer diameter of the main body, and the maximum distance between the two opposing surfaces of the two transition sections is equal to the outer diameter of the main body. In the left-right direction, the width of the two transition sections gradually decreases from the main body toward the flat plate section.

[0011] Furthermore, each of the flat plate segments has a connecting surface on its left and right sides respectively, and the distance between the two connecting surfaces of each of the flat plate segments is smaller than the outer diameter of the main body.

[0012] Furthermore, the two extension arms are respectively provided with a through slot along the thickness direction thereof, and the two through slots respectively extend to the corresponding flat plate sections, and each abutment arm includes an offset portion connected to the corresponding extension arm and an abutment portion extending from the offset portion, and the width of the offset portion gradually decreases from the extension arm toward the abutment portion, and the center line of each abutment portion is located between the center line of the corresponding extension arm and the outer edge of the extension arm, and the two abutment portions are coplanar and staggered.

[0013] The present invention also adopts the following technical solution: an electrical connector combination, comprising a male connector and a female connector connected to the male connector, characterized in that: the male connector comprises an insulating base and a plurality of terminal modules accommodated in the insulating base, each of the terminal modules comprises a first insulating block, two signal terminals fixed to the first insulating block and a first shielding shell covering the outside of the first insulating block, the two signal terminals are used to transmit a pair of differential signals, each of the signal terminals comprises a main body, each of the first insulating blocks corresponds to covering two main bodies, one end of the main body is provided with a plug part, the main body and the plug part are both formed by stamping and curling, the outer diameter of the plug part is smaller than the outer diameter of the main body, the other end of the main body is provided with two elastic arms, each of the elastic arms includes a direction facing away from each other. An extension arm extending forward and an abutment arm bent in the opposite direction from the extension arm, the two abutment arms abut against the same conductive pad of a circuit board together; the female connector includes a female seat body and a plurality of docking terminal modules accommodated in the female seat body, each of the docking terminal modules includes a second insulating block, two socket terminals fixed to the first insulating block and a second shielding shell covering the outside of the second insulating block, each of the socket terminals has a connecting portion and a docking portion, the docking portion and the connecting portion are connected and are both formed by stamping and curling, and the docking portion is open at one end away from the connecting portion for the plug portion to be inserted; when the female connector is connected to the male connector, the plug portions of the plurality of signal terminals are inserted into the docking portions of the plurality of socket terminals one by one and the plurality of plug portions are electrically connected to the plurality of docking portions one by one.

[0014] Furthermore, each of the first shielding shells has a first cylindrical portion corresponding to the two main body portions and a first receiving portion extending from the first cylindrical portion in the front-to-back direction to accommodate the two plug portions, the first receiving portion has a first shielding plate and two first side plates respectively connected to both sides of the first shielding plate and arranged opposite to each other, the first receiving portion is open on the side opposite to the first shielding plate, and in the front-to-back direction, one end of each of the first side plates is inclined toward the first cylindrical portion, and the inclination angles of the two first side plates are the same, each of the second shielding shells has a second cylindrical portion corresponding to the two connecting portions and a second receiving portion extending from the second cylindrical portion in the front-to-back direction to accommodate the two docking portions, The second housing portion has a second shielding plate and two second side plates respectively connected to both sides of the second shielding plate and arranged opposite to each other. The second housing portion is open on the side opposite to the second shielding plate. In the front-to-back direction, one end of each second side plate is inclined toward the second cylindrical portion and the inclination angles of the two second side plates are the same. The inclination angle of each second side plate is complementary to the inclination angle of each first side plate. When the female connector is connected to the male connector, the first shielding plate of each first shielding shell is opposite to the second shielding plate of each second shielding shell and the two first side plates of the first shielding shell are respectively spliced with the two second side plates of the second shielding shell.

[0015] Furthermore, each of the second insulating blocks is provided with two terminal holes along the front-to-back direction to respectively accommodate the two socket terminals, and the outer diameter of the connecting portion is equal to the outer diameter of the main body.

[0016] Furthermore, the signal terminal is formed by two first stamping parts of the same structure being relatively assembled and fixed by welding. A portion of each first stamping part is stamped and curled to form a semicircular cross section, and the other portion is stamped and bent to form the elastic arm.

[0017] Compared with the prior art, the present invention has the following beneficial effects: the main body of the signal terminal, the plug part, and the docking part and the connecting part of the jack terminal are all formed into a cylindrical structure by stamping and curling, and the plug part is inserted into the docking part to form an electrical contact inside the docking part, thereby avoiding the plug part being stacked on the periphery of the docking part for electrical contact and increasing the outer size of the docking part, that is, avoiding the problem of a sudden change in characteristic impedance caused by an additional increase in the overall outer diameter of the docking area of the signal terminal and the jack terminal, so that the signal can be transmitted along the outer diameter of the main body of the signal terminal and the outer diameter of the jack terminal itself, thereby ensuring the characteristic impedance matching of the signal terminal and the jack terminal. The two abutting arms are respectively extended in directions away from each other and the two abutting arms are respectively bent in reverse directions from the two extension arms to abut against the circuit board. The two bendings make the force arms of the two elastic arms longer, thereby enhancing the elastic performance of the two elastic arms. The two abutting arms extend in opposite directions respectively, so that the sliding forces of the two abutting arms when abutting against the circuit board offset each other, thereby ensuring that the two abutting arms can accurately contact the conductive pad. The two abutting arms jointly abut the same conductive pad of the circuit board, so that the signal terminal can have two conductive paths at the same time through the two elastic arms, thereby improving the signal transmission rate of the signal terminal.

Brief Description of the Drawings

[0018] Figure 1 This is a schematic diagram of the electrical connection structure of the present invention before docking;

[0019] Figure 2 This is a schematic diagram of the electrical connection structure of the present invention after docking;

[0020] Figure 3 This is a three-dimensional schematic diagram of the signal terminal of the present invention;

[0021] Figure 4 This is a schematic diagram of the signal terminal of the present invention being connected to the material strip;

[0022] Figure 5 This is a rear view of the signal terminal of the present invention;

[0023] Figure 6 This is a top view of the two signal terminals of the present invention when they are in contact with the circuit board;

[0024] Figure 7 This is a partial exploded view of the electrical connector assembly of the present invention before docking;

[0025] Figure 8This is a three-dimensional schematic diagram of the electrical connector assembly of the present invention when it is mounted on a circuit board after being docked;

[0026] Figure 9 This is a three-dimensional exploded view of the terminal module of the present invention;

[0027] Figure 10 This is a three-dimensional exploded view of the docking terminal module of the present invention;

[0028] Figure 11 It is a three-dimensional schematic diagram of the terminal module of the present invention after docking with the docking terminal module;

[0029] Figure 12 It is a cross-sectional view of the terminal module of the present invention after docking with the docking terminal module.

[0030] Description of the accompanying drawings for the specific embodiments:

[0031]

[0032] [Specific implementation method]

[0033] In order to facilitate a better understanding of the purpose, structure, features and effects of the present invention, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods.

[0034] For the accuracy of description, please refer to the direction in this article. Figure 1 For reference, the term "X-axis direction" refers to the plug-in direction of the signal terminal 4 and the socket terminal 8, that is, the front-to-back direction (where the positive direction of the X-axis is the front). The term "Y-axis direction" refers to the horizontal direction perpendicular to the plug-in direction of the signal terminal 4 and the socket terminal 8, that is, the left-to-right direction (where the positive direction of the Y-axis is the left). The term "Z-axis direction" refers to the direction perpendicular to the plug-in direction of the signal terminal 4 and the socket terminal 8, that is, the up-down direction (where the positive direction of the Z-axis is the top). Among them, the X-axis direction, the Y-axis direction and the Z-axis direction together constitute the three orthogonal directions of the electrical connector. For the convenience of description, the up and down, left and right, and front and back directions in the present invention are relative positions and do not constitute a limitation to the implementation. The X-axis direction, the Y-axis direction and the Z-axis direction of the electrical connection structure and the electrical connector combination can be customized according to the specific structure of the product and the perspective of the drawings, and the present invention does not make specific limitations.

[0035] See also Figures 7 to 10The electrical connector combination of the present invention includes a male connector and a female connector connected to each other in the front-to-back direction, the male connector includes an insulating base 1 and a plurality of terminal modules M1, the female connector includes a female base body 5 and a plurality of docking terminal modules M2, the signal terminals 4 in each of the terminal modules M1 and the socket terminals 8 in each of the docking terminal modules M2 are plugged in and matched one by one along the front-to-back direction to form an electrical connection structure, which is used to transmit high-speed signals.

[0036] like Figure 7 、 Figure 9 and Figure 12 As shown, the male connector includes an insulating base 1 and a plurality of terminal modules M1 respectively housed in the insulating base 1. Each terminal module M1 includes a first insulating block 2 and two signal terminals 4 fixed within the first insulating block 2. The two signal terminals 4 of each terminal module M1 are used to transmit a pair of differential signals. The outer side of each first insulating block 2 is covered with a first shielding shell 3 to shield the signal terminals 4. Each first shielding shell 3 has a first cylindrical portion 31 and a first receiving portion 32 extending from the first cylindrical portion 31 in the front-to-back direction. The first receiving portion 32 has a first shielding plate 321 and two first side plates 322 connected to both sides of the first shielding plate 321 and arranged opposite to each other. The first receiving portion 32 is open on the side opposite the first shielding plate 321. In the front-to-back direction, the first side plates 322 are inclined from one end of each first side plate 322 toward the first cylindrical portion 31, and the two second side plates 322 have the same inclination angle.

[0037] like Figure 1 and Figures 3 to 6As shown, each signal terminal 4 is formed by two first stamped parts made of metal and having the same structure, assembled in a vertical direction. Each signal terminal 4 includes a main body 42, with a plug portion 41 extending from one end of the main body 42. Both the main body 42 and the plug portion 41 are cylindrical in structure, and the outer diameter R2 of the plug portion 41 is smaller than the outer diameter R1 of the main body 42. Two elastic arms 43 are provided at the other end of each main body 42. The two elastic arms 43 are respectively located at the rear end of the two first stamped parts and are formed by stamping and bending. When viewed from left to right, the projections of the two first stamped parts are symmetrical along their centerline. That is, the two first stamped parts are stamped from the same set of dies, eliminating the need for an additional set of dies and saving manufacturing costs. The portions of the two first stamping parts corresponding to the main body 42 and the plug part 41 are both stamped and curled into a semicircular shape. The two second stamping parts are fixedly connected and integrated by laser spot welding at the joint between the two first stamping parts on the main body 42. The two first stamping parts formed by stamping and curling the main body 42 are joined and fixed to form a cylindrical shape, ensuring that the overall outer diameter R1 of the main body 42 is roughly consistent. This minimizes the occurrence of characteristic impedance mismatches caused by changes in the outer diameter of the main body 42, thereby improving the high-frequency transmission performance of the main body 42. Furthermore, the two first stamping parts have the same structure and are vertically symmetrical, facilitating stable vertical docking between the plug part 41 and the two docking arms 821, preventing poor contact and improving the docking effect between the signal terminal 4 and the receptacle terminal 8. The cylindrical shape of the plug part 41, with an outer diameter R2 smaller than the outer diameter R1 of the main body 42, facilitates insertion of the plug part 41 into the receptacle terminal 8. Each elastic arm 43 includes a flat section 432 and a transition section 431 extending from one end of the flat section 432 in the front-to-back direction and connected to the main body 42. In the up-down direction, the distance between the two opposing surfaces of the two flat sections 432 is equal to the outer diameter R1 of the main body 42, and the maximum distance between the two opposing surfaces of the two transition sections 431 is equal to the outer diameter R1 of the main body 42, so that the characteristic impedance of the portion from the main body 42 to the flat section 432 is matched, and the occurrence of sudden changes in characteristic impedance is minimized; in the left-right direction, the width of the two transition sections 431 gradually decreases from one end of the main body 42 toward the flat section 432, so that the width of the transition section 431 changes evenly, and the stress of the two elastic arms 43 is relieved by the two transition sections 431.Each of the flat plate segments 432 has a connecting surface 4321 on both sides in the left-right direction. By providing two connecting surfaces 4321 on each flat plate segment 432 to connect the material strip L, the connecting stability of the signal terminal 4 is enhanced. Furthermore, the distance between the two connecting surfaces 4321 of each flat plate segment 432 in the left-right direction is less than the outer diameter R1 of the main body 42, thereby avoiding increasing the size of the signal terminal 4 in the left-right direction and meeting the miniaturization requirements of the signal terminal 4. An extension arm 433 is connected to the end of each flat plate segment 432 away from the transition section 431. The two extension arms 433 extend from the corresponding flat plate segment 432 in directions away from each other. The two extension arms 433 are respectively provided with a through slot S along the thickness direction thereof. The two through slots S extend to the corresponding flat plate segment 432. The through slots S relieve the stress concentration of the extension arm 433 and the flat plate segment 432, thereby extending the service life of the elastic arm 43. The extension arm 433 is bent in the opposite direction from one end of each extension arm 433. An abutment arm 434 is extended, and the force arm of the elastic arm 43 is made longer by bending and extending each of the elastic arms 43 twice, thereby increasing the elastic performance of the elastic arm 43; further, each of the abutment arms 434 includes an offset portion 4341 connected to the corresponding extension arm 433 and an abutment portion 4342 bent and extended from the offset portion 4341, and the width of the offset portion 4341 gradually decreases from the extension arm 433 toward the abutment portion 4342, so that the width of the abutment arm 434 changes evenly to improve stress concentration. The two abutting portions 4342 of each signal terminal 4 abut against the same conductive pad P of the circuit board 9, so that the signal terminal 4 has two conductive paths at the same time through the two elastic arms 43, thereby improving the signal transmission rate of the signal terminal 4; and the two abutting arms 434 extend in opposite directions respectively, so that the sliding forces when the two abutting arms 434 abut against the circuit board 9 offset each other, avoiding misaligned contact between the two abutting portions 4342 and the conductive pad P, and ensuring that the two abutting portions 4342 can accurately contact the conductive pad P. The center line of each abutment portion 4342 is located between the center line of the corresponding extension arm 433 and the outer edge of the extension arm 433, avoiding the two abutment portions 4342 from additionally increasing the size of the signal terminal 4 in the left and right directions, meeting the miniaturization requirements of the signal terminal 4; further, the two abutment portions 4342 of each signal terminal 4 are coplanar and staggered, avoiding the two abutment arms 434 from colliding with each other during the sliding process and causing deformation, thereby ensuring the structural stability of the elastic arm 43.

[0038] like Figure 7 、 Figure 10 and Figure 12As shown, the female connector includes the female end base body 5 and a plurality of the mating terminal modules M2 accommodated in the female end base body 5. Each of the mating terminal modules M2 includes a second insulating block 6 and two receptacle terminals 8 fixed to the second insulating block 6. The outer side of each second insulating block 6 is covered with a second shielding shell 7 to shield the two receptacle terminals 8. Each second shielding shell 7 has a second cylindrical portion 71 and a second receiving portion 72 extending from the second cylindrical portion 71 in the front-to-back direction. The second receiving portion 72 has a second shielding plate 721 and two second side plates 722 respectively connected to both sides of the second shielding plate 721 and arranged opposite to each other. The second receiving portion 72 is open on the side opposite to the second shielding plate 721. In the front-to-back direction, one end of each second side plate 722 is tilted toward the second cylindrical portion 71, and the two second side plates 722 have the same inclination angle.

[0039] like Figure 1 and Figure 2As shown, each of the socket terminals 8 is formed by two second stamping parts made of metal and curled by stamping so that the cross section of the socket terminal 8 is formed by two semicircular arcs relatively spliced in the up and down directions. Each of the socket terminals 8 has a connecting portion 81 and a docking portion 82. The docking portion 82 is connected to the connecting portion 81. One end of the docking portion 82 away from the connecting portion 81 is open for the plug portion 41 to be inserted. The docking portion 82 and the connecting portion 81 are both cylindrical structures. The parts of the two second stamping parts corresponding to the connecting part 81 are both formed into a semicircular shape by stamping and curling, and the two second stamping parts are fixed by laser spot welding at the seams of the connecting part 81, so that the two second stamping parts formed by stamping and curling of the connecting part 81 are spliced and fixed to form a cylindrical shape, ensuring that the overall outer diameter R3 of the connecting part 81 is roughly consistent, minimizing the occurrence of impedance mismatch and characteristic impedance mutation caused by the change of the outer diameter R3 of the connecting part 81, and improving the high-frequency transmission performance of the connecting part 81; the two second stamping parts are provided with two oppositely arranged slits at the docking part 82, and the docking part 82 includes two oppositely arranged arc-shaped docking arms 821, and the two docking arms 821 are respectively extended from the upper half and the lower half of the cylindrical connecting part 81 in the front-to-back direction, that is, the two second stamping parts are respectively formed by stamping and curling. The two docking arms 821 are identical and have an arc-shaped cross-section, so that the outer diameter of the docking portion 82 roughly matches the outer diameter of the connecting portion 81; the two docking arms 821 enclose an insertion cavity 83 for the plug portion 41 to be inserted, and each docking arm 821 has an extension section 8211 extending from the connecting portion 81 and a docking section 8212 formed by bending inward and extending from the extension section 8211 to abut against the plug portion 41, and a guide section 8213 is formed by extending away from each other from the two docking sections 8212 to guide the plug portion 41 to be inserted into the docking portion 82. In this embodiment, the outer diameter of the docking portion 82 gradually decreases from the connecting portion 81 toward the docking section 8212 and gradually increases from the docking section 8212 toward the guide section 8213. The outer diameter R4 of the docking section 8212 is smaller than the outer diameter R3 of the connecting portion 81. The edges of the two docking arms 821 are spaced apart from each other to increase the elasticity of the two docking arms 821 , thereby increasing the elastic contact force in the up-down direction when the two docking arms 821 abut against the corresponding plug parts 41 .

[0040] like Figure 1 、 Figure 2 and Figure 11 、 Figure 12As shown, when the male connector and the female connector are connected to each other, the plurality of signal terminals 4 and the plurality of jack terminals 8 are plugged in one by one, and the two guide sections 8213 of each jack terminal 8 jointly guide the plug portion 41 of the corresponding signal terminal 4 into the plug cavity 83, and the plug portion 41 abuts against the inner wall surface of the docking section 8212 of the two docking arms 821 to form an electrical connection, and the front section of the plug portion 41 is accommodated in the area enclosed by the two extension sections 8211, and each plug portion 41 is inserted into the corresponding pair The connection portion 82 is electrically connected to the inside of the docking portion 82, so as to avoid the plug portion 41 being stacked on the periphery of the docking portion 82 for electrical contact and increasing the outer size of the docking portion 82, that is, to avoid the problem of a sudden change in characteristic impedance caused by the additional increase in the overall outer diameter of the docking area of the signal terminal 4 and the jack terminal 8, so that the signal can be transmitted along the outer diameter of the main body 42 of the signal terminal 4 and the outer diameter of the jack terminal 8 itself, ensuring the characteristic impedance matching of the signal terminal 4 and the jack terminal 8, and improving the high-frequency transmission performance of the electrical connection structure. Further, the plug portion 41 is inserted into the docking portion 82 for electrical contact, so that the connection portion 82 and the main body 41 are electrically conductive, and the outer diameter R3 of the connection portion 81 is roughly equal to the outer diameter R1 of the main body 42, so that the characteristic impedance of the connection portion 81 and the main body 42 are matched, and the high-frequency transmission performance of the electrical connection structure is improved. Figures 9 to 12As shown, the first insulating block 2 in each of the terminal modules M1 corresponds to covering the two main bodies 42, and the second insulating block 6 in each of the docking terminal modules M2 is provided with two terminal holes 61 along the front-to-back direction to respectively accommodate the docking parts 82 and the connecting parts 81 of the two jack terminals 8. In this embodiment, there is a gap between the inner wall surfaces of the two terminal holes 61 and the outer surfaces of the corresponding two docking parts 81. When the main body 42 is inserted into the docking part 81, the two docking arms 821 are subjected to the abutment force of the main body 42 in the up-down direction and are respectively offset in the direction away from each other. At this time, the gap between the outer surface of the docking part 81 and the second insulating block 6 is reduced. The outer sides of the main body 42, the connecting part 81 and the docking part 82 are all made of insulating plastic with equal dielectric constant, so that the capacitance around the outer sides of the main body 42, the connecting part 81 and the docking part 82 is roughly consistent, which is conducive to ensuring the impedance matching of the electrical connection structure; and the first cylinder of each of the first shielding shells 3 The cylindrical portion 31 corresponds to covering the two main bodies 42, the second cylindrical portion 71 of each second shielding shell 7 corresponds to covering the two connecting portions 81, and the inclination angle of the first side plate 322 of each first shielding shell 3 is complementary to the inclination angle of the second side plate 722 of each second shielding shell 7. When the terminal module M1 is connected to the docking terminal module M2 one by one, the first shielding plate 321 of each first shielding shell 3 is arranged opposite to the second shielding plate 721 of each second shielding shell 7, and the two first side plates 322 of the first shielding shell 3 are respectively corresponding to the two second side plates 722 of the second shielding shell 7. The first shielding plate 321 and the second shielding plate 721 respectively cover the second receiving portion 72 and the open side of the first receiving portion 32. The first side plate 322 and the second side plate 722 are spliced with each other to jointly cover the sides of the main body 42 and the docking portion 82 to improve the shielding effect of the first shielding shell 3 and the second shielding shell 7.The outer diameter R3 of the docking portion 82 gradually decreases from the connecting portion 81 toward the docking section 8212. After the plug portion 41 is inserted into the docking portion 82, the outer diameter R4 of the docking portion 82 corresponding to the docking section 8212 is smaller than the outer diameter R3 of the connecting portion 81 and the outer diameter R1 of the main body 42. That is, the outer diameter R4 of the entire docking portion 82 located at the docking section 8212 is the smallest, so as to enhance the abutting force between the docking section 8212 and the plug portion 41, so that the jack terminal 8 and the signal terminal 4 abut more tightly. In other embodiments, the outer diameter R4 of the docking portion 82 corresponding to the docking section 8212 may also be equal to the outer diameter R3 of the connecting portion 81 and the outer diameter R1 of the main body 42. As long as the overall outer diameter of the electrical connection structure from the connecting portion 81 to the main body 42 is roughly close and the change is small to ensure characteristic impedance matching and minimize the occurrence of characteristic impedance mutation, the present invention does not impose any restrictions on this.

[0041] In summary, the electrical connection structure and the electrical connector assembly of the present invention have the following beneficial effects:

[0042] (1) The main body 42 of the signal terminal 4 and the plug part 41 as well as the docking part 82 and the connecting part 81 of the jack terminal 8 are all formed into a cylindrical structure by stamping and curling. The plug part 41 is inserted into the docking part 82 to form an electrical contact inside the docking part 82, thereby avoiding the plug part 41 being stacked on the periphery of the docking part 82 for electrical contact and increasing the outer size of the docking part 82, that is, avoiding the problem of a sudden change in characteristic impedance caused by additionally increasing the overall outer diameter of the docking area of the signal terminal 4 and the jack terminal 8. The signal can be transmitted along the outer diameter of the main body 42 of the signal terminal 4 and the outer diameter of the jack terminal 8 itself, thereby ensuring the characteristic impedance matching of the signal terminal 4 and the jack terminal 8 and improving the electrical connection structure. high-frequency transmission performance; on the other hand, the two extension arms 433 extend in directions away from each other and the two abutting arms 434 are respectively bent in reverse from the two extension arms 433 to abut against the circuit board 9. The two bendings make the force arms of the two elastic arms 43 longer, thereby enhancing the elastic performance of the two elastic arms 43; the two abutting arms 434 extend in opposite directions, respectively, so that the sliding forces of the two abutting arms 434 when abutting against the circuit board 9 offset each other, ensuring that the two abutting arms 434 can accurately contact the conductive pad P; the two abutting arms 434 jointly abut the same conductive pad P of the circuit board 9, so that the signal terminal 4 can have two conductive paths at the same time through the two elastic arms 43, thereby improving the signal transmission rate of the signal terminal 4.

[0043] (2) The plug portion 41 is inserted into the docking portion 82 and electrically contacts it, thereby achieving electrical conduction between the connecting portion 82 and the main body portion 41. The outer diameter R3 of the connecting portion 81 is substantially equal to the outer diameter R1 of the main body portion 42, so that the characteristic impedances of the connecting portion 81 and the main body portion 42 are matched, minimizing the occurrence of characteristic impedance mutations and improving the high-frequency transmission performance of the electrical connection structure.

[0044] (3) Each of the jack terminals 8 is formed by two second stamping parts made of metal, which are stamped and curled so that the cross section of the jack terminal 8 is formed by two semicircular arcs being spliced together. The two second stamping parts are fixed by laser spot welding at the connecting portion 81, so that the two second stamping parts formed by stamping and curling the connecting portion 81 are spliced and fixed to form a cylindrical shape, ensuring that the overall outer diameter R3 of the connecting portion 81 is roughly consistent, minimizing the occurrence of characteristic impedance mutation caused by characteristic impedance mismatch due to the change of outer diameter R3 of the connecting portion 81, and improving the high-frequency transmission performance of the connecting portion 81.

[0045] (4) Each of the signal terminals 4 is formed by two first stamping parts made of metal and having the same structure, which are relatively assembled to form the cylindrical plug part 41 and the main body part 42. The two first stamping parts are fixed by laser spot welding at the main body part 42, so that the two second stamping parts are fixedly connected to form a whole. The two first stamping parts formed by stamping and curling the main body 42 are assembled and fixed to form a cylindrical shape, ensuring that the overall outer diameter R1 of the main body part 42 is roughly consistent, and the overall outer diameter R2 of the plug part 41 is also roughly consistent, thereby minimizing the occurrence of characteristic impedance mutations caused by characteristic impedance mismatch due to changes in the outer diameter of the main body part 42, thereby improving the high-frequency transmission performance of the main body part 42; and the two first stamping parts have the same structure and are symmetrical in the upper and lower directions, which facilitates the stable docking of the plug part 41 with the two docking arms 821 in the upper and lower directions, avoiding poor contact, and improving the docking effect of the signal terminal 4 and the jack terminal 8.

[0046] (5) In the vertical direction, the distance between the two opposing surfaces of the two flat sections 432 is equal to the outer diameter R1 of the main body 42, and the maximum distance between the two opposing surfaces of the two transition sections 431 is equal to the outer diameter R1 of the main body 42, so that the characteristic impedance of the portion from the main body 42 to the flat section is matched, and the occurrence of a sudden change in characteristic impedance is minimized; in the left-right direction, the width of the two transition sections 431 gradually decreases from one end of the main body 42 toward the flat section 432, so that the width of the transition section 431 changes evenly, and the stress of the two elastic arms 43 is relieved by the two transition sections 431.

[0047] (6) Each of the flat plate segments 432 has a connecting surface 4321 on both sides in the left and right directions. By setting two connecting surfaces 4321 on each of the flat plate segments 432 to connect the material strip L, the connecting stability of the signal terminal 4 is enhanced. The distance between the two connecting surfaces 4321 of each of the flat plate segments 432 is smaller than the outer diameter R1 of the main body 42, thereby avoiding increasing the size of the signal terminal 4 in the left and right directions and meeting the miniaturization requirements of the signal terminal 4.

[0048] (7) The two extension arms 433 are respectively provided with a through slot S along the thickness direction thereof, and the two through slots S respectively extend to the corresponding flat plate section 432. The through slots S relieve the stress concentration of the extension arm 433 and the flat plate section 432, thereby extending the service life of the elastic arm 43. The width of the offset portion 4341 gradually decreases from the extension arm 433 toward the abutting portion 4342, so that the width of the abutting arm 434 changes evenly, thereby improving stress concentration.

[0049] (8) The first cylindrical portion 31 of each first shielding shell 3 covers the two main body portions 42, the second cylindrical portion 71 of each second shielding shell 7 covers the two connecting portions 81, and the inclination angle of the first side plate 322 of each first shielding shell 3 is complementary to the inclination angle of the second side plate 722 of each second shielding shell 7. When the terminal module M1 is connected to the docking terminal module M2 one by one, the first shielding plate 321 of each first shielding shell 3 is arranged opposite to the second shielding plate 721 of each second shielding shell 7, and the two first side plates 322 of the first shielding shell 3 are respectively spliced with the two second side plates 722 of the second shielding shell 7. The first shielding plate 321 and the second shielding plate 721 respectively cover the second receiving portion 72 and the open side of the first receiving portion 32. The first side plate 322 and the second side plate 722 are spliced with each other to cover the four sides of the main body 42 and the docking portion 82 together to improve the shielding effect of the first shielding shell 3 and the second shielding shell 7.

[0050] The above detailed description is only an illustration of the preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made by using the description and illustrations of this invention are included in the patent scope of this invention.

Claims

1. An electrical connection structure comprising a signal terminal and a socket terminal for plug-fitting, characterized in that: include: The signal terminal includes a main body, one end of which is extended by a plug portion, the main body and the plug portion are both formed by stamping and curling, the outer diameter of the plug portion is smaller than the outer diameter of the main body, and the other end of the main body is provided with two elastic arms, each of the elastic arms includes an extension arm extending in a direction away from each other and an abutting arm bent in the opposite direction from the extension arm, and the two abutting arms abut against the same conductive pad of a circuit board; The jack terminal has a connecting portion and a butt joint portion, the butt joint portion and the connecting portion are connected and are both formed by stamping and curling, and one end of the butt joint portion away from the connecting portion is open for the plug portion to be inserted; When the signal terminal is connected to the socket terminal, the plug portion is inserted into the docking portion and forms an electrical connection with the docking portion.

2. The electrical connection structure according to claim 1, wherein: The outer diameter of the connecting portion is equal to the outer diameter of the main body portion.

3. The electrical connection structure according to claim 1, wherein: The docking portion includes two docking arms extending from the connecting portion and arranged opposite to each other. The cross-sections of the two docking arms are arc-shaped, and the edges of the two docking arms are spaced apart from each other. The two docking arms form an insertion cavity for the plug portion to be inserted. Each of the docking arms has an extension section extending from the connecting portion and a docking section formed by bending inward and extending from the extension section to abut against the plug portion. A guide section is formed by extending from the two docking sections in a direction away from each other to guide the plug portion to be inserted into the docking portion. The outer diameter of the docking portion corresponding to the position of the docking section is less than or equal to the outer diameter of the connecting portion and the outer diameter of the main body.

4. The electrical connection structure according to claim 1, wherein: The socket terminal is formed by stamping and curling two second stamping parts so that the cross section of the socket terminal is formed by splicing two semicircular arcs. The two second stamping parts are welded and fixed at the connecting part. The two second stamping parts are provided with two oppositely arranged slits at the docking part.

5. The electrical connection structure according to claim 1, wherein: The signal terminal extends in the front-to-back direction. The signal terminal is formed by two first stamping parts of the same structure that are relatively assembled in the up-down direction to form the cylindrical plug part and the main body part. The two first stamping parts are welded and fixed at the main body part. The two elastic arms are respectively located at the rear sections of the two first stamping parts and are formed by stamping and bending.

6. The electrical connection structure according to claim 5, wherein: Observing from left to right, the projections of the two first stamping parts are symmetrically arranged along their center lines, and the two elastic arms each include a flat plate section connected to the extension arm and a transition section extending from one end of the flat plate section in the front-to-back direction and connected to the main body. In the up-down direction, the distance between the two opposing surfaces of the flat plate section is equal to the outer diameter of the main body, and the maximum distance between the two opposing surfaces of the transition sections is equal to the outer diameter of the main body. In the left-right direction, the width of the two transition sections gradually decreases from the main body toward the flat plate section.

7. The electrical connection structure according to claim 6, wherein: Each of the flat plate segments has a connecting surface on its left and right sides respectively, and a distance between the two connecting surfaces of each of the flat plate segments is smaller than the outer diameter of the main body.

8. The electrical connection structure according to claim 6, wherein: The two extension arms are respectively provided with a through slot along the thickness direction thereof, and the two through slots respectively extend to the corresponding flat plate sections. Each of the abutting arms includes an offset portion connected to the corresponding extension arm and an abutting portion extending from the offset portion. The width of the offset portion gradually decreases from the extension arm toward the abutting portion. The center line of each abutting portion is located between the center line of the corresponding extension arm and the outer edge of the extension arm. The two abutting portions are coplanar and staggered.

9. An electrical connector assembly, comprising a male connector and a female connector connected to the male connector, characterized in that: include: The male connector includes an insulating base and a plurality of terminal modules accommodated in the insulating base, each of the terminal modules includes a first insulating block, two signal terminals fixed to the first insulating block, and a first shielding shell covering the outer side of the first insulating block, the two signal terminals are used to transmit a pair of differential signals, each of the signal terminals includes a main body, each of the first insulating blocks correspondingly covers two main bodies, one end of the main body is provided with a plug part, the main body and the plug part are both formed by stamping and curling, the outer diameter of the plug part is smaller than the outer diameter of the main body, the other end of the main body is provided with two elastic arms, each of the elastic arms includes an extension arm extending in a direction away from each other and an abutting arm bent in the opposite direction from the extension arm, the two abutting arms abut against the same conductive pad of a circuit board; The female connector includes a female end seat body and a plurality of docking terminal modules accommodated in the female end seat body, each of the docking terminal modules includes a second insulating block, two socket terminals fixed to the first insulating block, and a second shielding shell covering the outer side of the second insulating block, each of the socket terminals has a connecting portion and a docking portion, the docking portion and the connecting portion are connected and are both formed by stamping and curling, and the docking portion is open at one end away from the connecting portion for the plug portion to be inserted; When the female connector is connected to the male connector, the plug parts of the plurality of signal terminals are inserted into the docking parts of the plurality of jack terminals one by one and the plurality of plug parts are electrically connected to the plurality of docking parts one by one.

10. The electrical connector assembly according to claim 9, wherein: Each of the first shielding shells has a first cylindrical portion corresponding to the two main body portions and a first receiving portion extending from the first cylindrical portion in the front-to-back direction to accommodate the two plug portions, the first receiving portion has a first shielding plate and two first side plates respectively connected to both sides of the first shielding plate and arranged opposite to each other, the first receiving portion is open on the side opposite to the first shielding plate, and in the front-to-back direction, one end of each first side plate is inclined toward the first cylindrical portion and the inclination angles of the two first side plates are the same, each of the second shielding shells has a second cylindrical portion corresponding to the two connecting portions and a second receiving portion extending from the second cylindrical portion in the front-to-back direction to accommodate the two docking portions, the The second housing portion has a second shielding plate and two second side plates respectively connected to both sides of the second shielding plate and arranged opposite to each other. The second housing portion is open on the side opposite to the second shielding plate. In the front-to-back direction, one end of each second side plate is inclined toward the second cylindrical portion and the inclination angles of the two second side plates are the same. The inclination angle of each second side plate is complementary to the inclination angle of each first side plate. When the female connector is connected to the male connector, the first shielding plate of each first shielding shell is opposite to the second shielding plate of each second shielding shell and the two first side plates of the first shielding shell are respectively assembled with the two second side plates of the second shielding shell.

11. The electrical connector assembly according to claim 9, wherein: Each of the second insulating blocks is penetrated by two terminal holes along the front-to-back direction to respectively accommodate the two socket terminals. The outer diameter of the connecting portion is equal to the outer diameter of the main body portion.

12. The electrical connector assembly according to claim 9, wherein: The signal terminal is formed by two first stamping parts of the same structure being relatively assembled and fixed by welding. A portion of each first stamping part is stamped and curled to form a semicircular cross section, and the other portion is stamped and bent to form the elastic arm.

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