Reversible USB socket

Abstract

A reversible USB socket includes a metal middle plate, first and second terminal groups respectively located on both sides of the metal middle plate, and an insulating body that forms the metal middle plate and the first and second terminal groups into one body. The first and second terminal groups respectively and sequentially include a ground terminal, a high-frequency signal terminal, a power terminal, a conventional signal terminal, a power terminal, a high-frequency signal terminal, and a ground terminal in the lateral direction. The thickness of the ground terminal and the power terminal is greater than that of the high-frequency signal terminal and the conventional signal terminal. The ground terminals in the same row are stamped into one body and gold-plated. The power terminals in the same row are stamped into one body and rhodium-ruthenium-plated. The conventional signal terminals and the high-frequency signal terminals in the same row are stamped into one body and rhodium-ruthenium-plated. This application takes into account both high-frequency and high-current transmission, and the cost is relatively low.

Description

Technical Field

[0001] This application relates to the field of electrical connectors, and particularly to a reversible USB socket. Background Art

[0002] Existing USB3.1 Type C sockets generally include a middle plate and first and second terminal groups disposed on the upper and lower sides of the middle plate respectively. In the association's standard, the standard for power transmission is only 2A, while current smartphones basically require high-current charging. Therefore, the standard structure can no longer meet the market needs. Several different high-current versions have emerged, that is, the middle part of the middle plate is cut off, and only the outer part of the middle plate is left to directly contact the grounding terminal for grounding. However, the sacrificed performance of this structure is the high-frequency transmission performance of the socket, because the shielding of the middle plate is missing between high-frequency signals, and high-frequency transmission cannot be achieved. Moreover, for the transmission of high-frequency signals, it is required that the grounding terminal cannot be connected to the middle plate for grounding. A high-frequency high-current socket of Chinese Patent Application No. 201821600514.0 solves the above technical problems. However, after the middle plate extends backward, the solder feet of the high-frequency signal terminals of the first terminal group and the solder feet of the high-frequency signal terminals of the second terminal group cannot be shielded from each other, and the high-frequency performance cannot be effectively improved. Moreover, currently, the requirements for the signal transmission performance of each terminal group are relatively high. Some conductive terminals require electroplating with precious metals rhodium and ruthenium. However, due to cost considerations, some conductive terminals only need to be electroplated with precious metal gold, and the terminal thicknesses are different, which poses new requirements for the structure and manufacturing process. The USB socket disclosed in Chinese Patent Application No. 201720630490.2 is provided with two sections, front and back, on the insulating body, and waterproofing is achieved by injecting glue into the step space. However, when injecting glue at the rear end of the insulating body, air bubbles may exist due to the inability of gas to be discharged smoothly, resulting in poor waterproof performance. Summary of the Invention

[0003] In view of this, it is necessary to provide a reversible USB socket that supports high-frequency transmission, can carry high-current charging, and has a relatively low cost.

[0004] To solve the above technical problems, the present application provides a reversible USB socket, which includes a metal middle plate, first and second terminal groups respectively located on both sides of the metal middle plate, and an insulating body that forms the metal middle plate and the first and second terminal groups into one body. The first and second terminal groups respectively and sequentially include a ground terminal, a high-frequency signal terminal, a power terminal, a conventional signal terminal, a power terminal, a high-frequency signal terminal, and a ground terminal in the lateral direction. The thickness of the ground terminal and the power terminal is greater than the thickness of the high-frequency signal terminal and the conventional signal terminal. The ground terminals in the same row are stamped into one body and gold-plated, the power terminals in the same row are stamped into one body and rhodium-ruthenium-plated, the conventional signal terminals and the high-frequency signal terminals in the same row are stamped into one body and rhodium-ruthenium-plated, and the gold-plated ground terminals, the rhodium-ruthenium-plated power terminals, and the rhodium-ruthenium-plated conventional signal terminals and high-frequency signal terminals are combined in the lateral direction to form the first or second terminal group.

[0005] Preferably, the gold-plated ground terminals, the rhodium-ruthenium-plated power terminals, and the rhodium-ruthenium-plated high-frequency signal terminals and conventional signal terminals are respectively connected by three sets of strip materials after stamping. When combining, the three sets of strip materials are stacked and combined for positioning.

[0006] Preferably, the metal middle plate is separately stamped and formed and is connected with a middle plate strip material, and the middle plate strip material is stacked and fixed with the strip material of the second terminal group.

[0007] Preferably, at least one of the three sets of strip materials of the first terminal group is fixed together by riveting, and at least one of the three sets of strip materials of the second terminal group is fixed together with the middle plate strip material by riveting.

[0008] Preferably, at least part of the three sets of strip materials of the first and second terminal groups and the strip material of the metal middle plate are bent so that when the strip materials are stacked, at least one side surface of the ground terminal, the power terminal, the high-frequency signal terminal, and the conventional signal terminal is coplanar.

[0009] Preferably, each conductive terminal of the first and second terminal groups includes a contact portion, a holding portion extending backward from the contact portion, and a welding leg extending out of the insulating body from the holding portion. The thickness of the ground terminal and the power terminal is greater than the terminal thickness of the high-frequency signal terminal and the conventional signal terminal. The metal middle plate includes a main plate portion located between the high-frequency signal terminals and a protruding portion extending outward laterally from the front end of the main plate portion. The vertical projection of the rear edge of the main plate portion is located between the welding legs of the high-frequency signal terminals of the first terminal group and the welding legs of the high-frequency signal terminals of the second terminal group.

[0010] Preferably, the insulating body includes a first insulator that integrally injection-molds the first terminal group, a second insulator that integrally forms the second terminal group and the metal middle plate, and a third insulator that integrally forms the first and second insulators. The first and second terminal groups are respectively located on the upper and lower sides of the metal middle plate, and the solder feet of the second terminal group are located behind the first terminal group.

[0011] Preferably, the rear end of the holding portion of the first terminal group is bent downward and then extends parallel to form a bent portion. At the position corresponding to the bent portion of the first terminal group, the rear end of the main body plate portion of the metal middle plate is bent downward to form a sunken portion. The rear end edge of the sunken portion is located between the solder feet of the high-frequency signal terminals of the first and second terminal groups in the vertical projection plane.

[0012] Preferably, two circulation holes are provided on the sunken portion of the metal middle plate. The insulating body includes a base portion, a docking tongue portion extending forward from the base portion, and a tail portion formed at the rear end of the base portion. A filling space is formed between the base portion and the tail portion, and the sunken portion at the position of the circulation holes is exposed in the filling space.

[0013] Preferably, the grounding terminal is thinned at the position corresponding to the protruding portion to form a groove structure to avoid the protruding portion so that the middle plate does not contact the grounding terminal. The sunken portion extends laterally outward to form an extending portion, and the extending portion extends out of the insulating body between the grounding terminals of the first and second terminal groups to connect to the tape.

[0014] Compared with the prior art, in this application, the grounding terminals in the same row are separately stamped and gold-plated, the power terminals in the same row are separately stamped and rhodium ruthenium-plated, and the high-frequency signal terminals and conventional signal terminals in the same row are separately stamped and rhodium ruthenium-plated, solving the problem that signal terminals and power terminals need to be plated with precious metal rhodium ruthenium to improve high-frequency, anti-aging and current transmission performance, while the grounding terminals only need to be gold-plated to reduce costs; and the thickness of the power terminals is greater than that of the signal terminals, solving the problem that the power terminals and signal terminals cannot be stamped and formed simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0016] Figure 1 is a three-dimensional combined view of the reversible USB socket of the present application;

[0017] Figure 2 is a three-dimensional exploded view of the reversible USB socket of the present application;

[0018] Figure 3 Is the three-dimensional view of the plug-in part of the reversible USB socket of the present application;

[0019] Figure 4 Is the three-dimensional exploded view of the plug-in part of the reversible USB socket of the present application;

[0020] Figure 5 Is the three-dimensional view of the second terminal group, the metal middle plate and the second insulator of the reversible USB socket of the present application formed as a whole;

[0021] Figure 6 Is along Figure 1 The cross-sectional view taken along the dashed line A-A shown;

[0022] Figure 7 Is the three-dimensional view of the metal middle plate of the reversible USB socket of the present application;

[0023] Figure 8 Is the top view of the first terminal group of the reversible USB socket of the present application;

[0024] Figure 9 Is the top view of the first and second terminal groups and the metal middle plate of the reversible USB socket of the present application;

[0025] Figure 10 Is the top view of the first terminal group and the metal middle plate of the reversible USB socket of the present application;

[0026] Figure 11 Is the left view of the first and second terminal groups and the metal middle plate of the reversible USB socket of the present application;

[0027] Figure 12 Is along Figure 9 The cross-sectional view taken along the dashed line B-B shown;

[0028] Figure 13 Is the three-dimensional view of the reversible USB socket of the present application at a second angle;

[0029] Figure 14 Is the three-dimensional view of the reversible USB socket of the present application at a third angle;

[0030] Figure 15 Is the three-dimensional view of the power terminal connecting tape of the second terminal group of the reversible USB socket of the present application;

[0031] Figure 16 Is the three-dimensional view of the connecting tape of the conventional signal terminal and the high-frequency signal terminal of the second terminal group of the reversible USB socket of the present application;

[0032] Figure 17 Is the three-dimensional view of the ground terminal connecting tape of the second terminal group of the reversible USB socket of the present application;

[0033] Figure 18 A perspective view when the second terminal group of the reversible USB socket of the present application is connected to a tape and stacked together for injection molding;

[0034] Figure 19 A perspective view of the second terminal group of the reversible USB socket of the present application after injection molding and partial tape removal;

[0035] Figure 20 A perspective view when the first terminal group and the metal middle plate of the reversible USB socket of the present application are connected to a tape and combined together for injection molding;

[0036] Figure 21 A perspective view of the second terminal group of the reversible USB socket of the present application after injection molding and partial tape removal;

[0037] Figure 22 A perspective view when the first and second terminal groups of the reversible USB socket of the present application are assembled together after injection molding and ready for secondary injection molding;

[0038] Figure 23 A perspective view of the connector of the reversible USB socket of the present application with a tape connected after injection molding. Detailed implementation manners

[0039] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0040] Please refer to Figures 1 to 4 、 Figure 13 、 Figure 14 As shown, the reversible USB socket of the present application includes a connector A, a drawing housing 50 sleeved outside the connector assembly A, fixed housings 71, 72 fixed outside the drawing housing 50, a waterproof ring 30 provided on the outer edge of the drawing housing 50, and a metal ring 60 sleeved and fixed outside the connector assembly A and welded to the drawing housing 50.

[0041] The metal ring 60 is manufactured by a drawing process. The metal ring 60 includes an annular main body 61 and a wall portion 62 formed at the front end of the annular main body 61. The wall portion 62 is perpendicular to the annular main body 51.

[0042] The fixed housing includes a first fixed shell 71 and a second fixed shell 72 clamped on the upper and lower sides of the drawing housing 50. The first fixed shell 71 includes a first fixed portion 711, first ear portions 712 extending from the lateral two sides of the first fixed portion 711, a shielding portion 714 extending from the rear end of the first fixed portion 711 to cover the tail of the plug-in member A, and a window 715 formed between the shielding cloth 714 and the first fixed portion 711. The first fixed portion 711 further extends laterally outward to form a side covering portion 713 covering the rear ends of the lateral two sides of the plug-in member A, and the shielding plate 714 is formed by vertically bending and extending downward from the rear end of the side covering portion 713.

[0043] The second fixed shell 72 includes a second fixed portion 721 and second ear portions 722 extending from the lateral two sides of the second fixed portion 721 and fixedly welded to the first ear portions 712 correspondingly. A support boss 723 is formed by a front-end protrusion on the surface of the second ear portion 722, and a clamping piece 724 extends inward from the rear end of the second ear portion 722. The first and second fixed shells 71 and 72 are respectively spot-welded to the upper and lower surfaces of the drawing housing 50.

[0044] Please continue to refer to Figures 4 - 12 As shown, the plug-in member A includes a metal middle plate 40, first and second terminal groups 20 and 30 located on the upper and lower sides of the metal middle plate 40 respectively, and an insulating body 10 formed by integrating the metal middle plate 40 with the first and second terminal groups 20 and 30.

[0045] The insulating body 10 includes a first insulator 11 that pre - forms the first terminal group 20 into one body, a second insulator 12 that pre - forms the second terminal group 30 and the metal middle plate 40 into one body, and a third insulator 13 that forms the first insulator 11 and the second insulator 12 into one body. The third insulator 13 includes a base 131, a docking tongue 132 extending forward from the base 131, and a tail 133 located at the rear end of the base 131 and completely independently isolated from the base 131. The outer diameter of the base 131 is greater than the outer diameter of the docking tongue 132, and convex ribs 134 are provided on the upper and lower surfaces of the base 131. The annular body 61 of the metal ring 60 is sleeved outside the base 131. The convex ribs 134 tightly fix the metal ring 60 to the base 131 without loosening. The wall portion 62 abuts against the front edge of the base 131 to prevent the plug - in part A from moving forward to limit the plug - in part A. The first, second, and third insulators 11, 12, 13 all include a base 131 and a tail 133, and a filling space 135 is formed between the base 131 and the tail 133. The first, second, and third insulators 11, 12, 13 connect the base 131 and the tail 133 through the first and second terminal groups 20, 30 and the metal middle plate 40 exposed in the filling space. A channel 136 is provided on the upper side of the tail 133 of the third insulator 13 corresponding to the window 715 of the first fixed shell 71 to facilitate injecting glue into the filling space 135 through the window 715 and the channel 136.

[0046] A buckle groove 138 for buckling the buckling piece 724 is further provided on the bottom surface of the tail 133 of the third insulator 13. The buckling piece 724 and the buckle groove 138 limit the plug - in part A from withdrawing backward.

[0047] The first and second terminal groups 20, 30 include grounding terminals 201, 301, high - frequency signal terminals 202, 302, power supply terminals 203, 303, conventional signal terminals 204, 304, power supply terminals 203, 303, high - frequency signal terminals 202, 302, and grounding terminals 201, 301 in sequence from left to right or from right to left.

[0048] The terminal thickness of the grounding terminals 201, 301 and the power supply terminals 203, 303 is 0.2 mm or 0.25 mm; the terminal thickness of the conventional signal terminals 204, 304 and the high - frequency signal terminals 202, 302 is 0.12 mm; this helps to carry a larger current.

[0049] Each conductive terminal of the first and second terminal groups 20 and 30 includes a contact portion 21, 31 exposed on the upper and lower surfaces of the docking tongue portion 132, a holding portion 22, 32 extending rearward from the contact portion 21, 31, and a solder leg 23, 33 extending rearward from the holding portion 22, 32 outside the insulating body 10.

[0050] The holding portions 22, 32 of the first or second terminal groups 20, 30 are bent upward at the position of the base portion 131 of the insulating body 10 to form a bent portion 221, so that the distance between the portions of the holding portions 22, 32 of the first and second terminal groups 20, 30 behind the bent portion 221 is increased. In a specific embodiment, the holding portions 22, 32 of the first and second terminal groups 20, 30 may also be bent and extended in opposite directions to increase the distance between the holding portions 22, 32.

[0051] For key reference Figure 7 As shown, the portion of the metal middle plate 40 located between the power supply terminals 203, 303 and the conventional signal terminals 204, 304 is completely cut off, thereby forming two independent middle plate structures on the left and right. Each independent metal middle plate 40 includes a main plate portion 41 extending in the plugging and unplugging direction, a protruding portion 42 extending laterally outward from the front end of the main plate portion 41, a sinking portion 44 formed at the rear end of the main plate portion 41, and a welding portion 47 extending from the sinking portion 44. The front edge of the main plate portion 41 is formed with a thinned portion 411, and the thinned portion 411 can avoid the relative bending of the front edges of the high-frequency signal terminals 202, 302 to leave a space.

[0052] The sinking portion 44 is formed by bending downward from the main body plate portion 41 and thus forms an inclined portion 43. The lateral width of the sinking portion 44 is greater than that of the main body plate portion 41. Two circulation holes 45 are provided on the sinking portion 44. The sinking portion 44 extends laterally outward to form an extension portion 46, and the lateral outer side of the extension portion 46 is used to connect a strip for facilitating production automation. The welding portion 47 is formed by extending from the rear end of the extension portion 46. A card slot 421 for buckling with a plug (not shown) is provided on the outer edge of the protruding portion 42. A through hole 422 is also provided on the protruding portion 42 to facilitate the flow of plastic for holding the metal middle plate 40. The position of the inclined portion 43 corresponds to the position of the bending portion 221 of the first or second terminal group 20, 30. The bending portion 221 is formed by bending the first terminal group 20 downward at the holding portion 22. The inclined portion 43 is formed by bending downward from the main body plate portion 41 to avoid contact with the downward-bent bending portion 221. One of the circulation holes 45 located on the inner side is not closed at the outer side so as to minimize the space occupied by the sinking portion 44 at the position of the circulation hole 45. The sinking portion 44 at the position of the circulation hole 45 is exposed in the filling space 135. By using the sinking portion 44 to bend at least one conductive terminal 20, the gap between the holding portions 22, 23 at the position of the filling space 135 and the sinking portion 44 is increased. At the same time, the setting of the circulation holes 45 can also increase the gap, which is convenient for injecting glue, enhances the fluidity of the glue, and prevents the glue from not completely filling the filling space 135, resulting in poor waterproof performance.

[0053] Refer to with emphasis Figure 6 As shown, the first and second insulators 11, 12 form an air gap 137 penetrating in the plugging and unplugging direction at the superposition position. When the third insulator 13 is injection-molded, the plastic will not fill the air gap 137. When injecting glue, when the glue 81 is injected from the window 175, the glue 81 will squeeze out the air in the filling space 135, and most of the air is discharged from the part exposed on the outer periphery of the filling space 135. However, if the tail portion 133 is located on one side of the filling space 135 and is airtight, due to the extremely small space, air bubbles may be formed inside the tail portion 133, and the existence of the air gap 137 can enable the air to be discharged backward from the filling space 135 to ensure that the glue fills the filling space 135.

[0054] Refer to with emphasis Figures 9 to 12 As shown, the main body plate portion 41 and the sinking portion 44 are located between the high-frequency signal terminals 202, 302 of the first and second terminal groups 20, 30 to shield the interference between the high-frequency signals of the upper and lower rows of high-frequency signal terminals 202, 302.

[0055] The holding portions 22, 32 of the first or second terminal groups 20, 30 are bent and extended away from each other so that there is sufficient distance between the holding portions 22, 32 for the sinking portion 44 to extend laterally outward and connect to the tape.

[0056] In one embodiment, the metal middle plate 40 does not have a sinking portion 44, and the sinking portion 44 is only a part of the main plate portion 41, that is, the part where the main plate portion 41 and the sinking portion 44 are located is on the same horizontal plane. In contrast, the holding portions 22, 32 of the first and second terminal groups 20, 30 are both bent and extended in a direction away from each other. In this way, it can be ensured that there is space for the metal middle plate 40 to extend laterally between the holding portions 22, 32 of the first and second terminal groups 20, 30.

[0057] Refer specifically to Figure 4 、 Figure 5 As shown, the front ends of the grounding terminals 201, 301 are thinned towards the position of the protruding portion 42 to form groove structures 2011, 3011 so that when the protruding portion 42 extends laterally outward beyond the position of the grounding terminals 201, 301, it does not contact the grounding terminals. And there is already sufficient distance at the position of the sinking portion 44 for the sinking portion 44 to extend laterally.

[0058] Please refer to Figure 7 、 Figure 8 As shown, except for the position where the protruding portion 42 of the metal middle plate 40 extends outward through the groove structures 2011, 3011 of the grounding terminals 201, 301, there is no metal middle plate 40 between the grounding terminals 201, 301 of the first and second terminal groups 20, 30. In this way, the grounding terminals 201, 301 can be thickened to 0.19 mm - 0.21 mm or 0.24 mm - 0.26 mm to carry a larger current. There is no metal middle plate 40 between the power terminals 203, 303 of the first and second terminal groups 20, 30, and similarly, the power terminals 203, 303 can be thickened to 0.19 mm - 0.21 mm or 0.24 mm - 0.26 mm to carry a larger current.

[0059] And the conventional signals are transmitted between the conventional signal terminals 204, 304, and there is no need to shield the conventional signals between the first and second terminal groups 20, 30, that is, there is no metal middle plate 40 between the conventional signal terminals 204, 304.

[0060] Refer specifically to Figure 11 、 Figure 12As shown, the solder feet 23 and 33 of the first and second terminal groups 20 and 30 are respectively arranged in two rows in the plugging and unplugging direction. The solder feet 33 of the second terminal group 30 on the upper side are located behind the solder feet 23 of the first terminal group 20. In the vertical projection direction, the rear edge of the sinking part 44 is located between the solder feet 33 of the second terminal group 33 and the solder feet 23 of the first terminal group 20, or is flush with the rear edge of the solder feet 23 of the first terminal group 20. In this way, the main board part 41 and the sinking part 44 can be completely blocked between the high-frequency signal terminals 202 and 302, including the solder feet 23 and 33 extending backward, which can effectively improve the high-frequency transmission performance.

[0061] Compared with the prior art, the high-frequency performance degradation caused by the inability of the metal middle plate 40 to shield the upper and lower rows of solder feet 23 and 33 of the first and second terminal groups 20 and 30. And in the prior art, the metal middle plate 40 is integrally injection-molded with the first terminal group 20 located in the lower row, and the rear end of the sinking part 44 must be covered, while the solder feet 23 of the first terminal group 20 must be exposed, resulting in the inability to shield the solder feet 23 of the first terminal group 20. In this case, the metal middle plate 40 is integrally injection-molded with the second terminal group 30 located in the upper row. Since the sinking part 44 and the solder feet 33 of the second terminal group 30 are in different positions in the plugging and unplugging direction, covering the sinking part 44 will not affect the exposure of the solder feet 33 of the second terminal group 30.

[0062] Please refer to Figures 15 to 23 As shown, the manufacturing method of the forward and reverse pluggable USB socket of the present application is introduced in detail, including the following steps:

[0063] S10. Respectively stamp and form the grounding terminals 201 and 301, signal terminals (the signal terminals include high-frequency signal terminals 202 and 302 and conventional signal terminals 203 and 303), and power supply terminals 203 and 303 of the first and second terminal groups 20 and 30; at the same time, stamp and form the metal middle plate 40;

[0064] In this step, the two terminals of the grounding terminals 201 and 301 are respectively connected with a first front strip 2011 and a first rear strip 2012 at the front and rear ends; the front and rear ends of several signal terminals are respectively connected with a second front strip 2021 and a second rear strip 2022; the front and rear ends of the power supply terminals 203 and 303 are connected with a third front strip 2031 and a third rear strip 2032. The metal middle plate 40 is connected with a middle plate strip 401, and the middle plate strip 401 extends laterally outward through the extension part 46 to form a first connection part 402. At the same time, a second connection part 403 connected to the middle plate strip 401 is provided at the front end of the main board part 41.

[0065] A space for accommodating the power terminals 203, 303 is provided between the conventional signal terminals 204, 304 and the high-frequency signal terminals 202, 302, and the ground terminals 201, 301 are respectively located on the lateral two sides of the high-frequency signal terminals 202, 302. The rear ends of the holding portions 22, 32 of the ground terminals 201, 301 extend laterally outward to form tape connection portions 2013, 2014, and the first rear tape 2012 is connected through the tape connection portions 2013, 2014; the tape connection portions include first extension portions 2013 extending laterally outward from the lateral outsides of the holding portions 22, 32 and second extension portions 2014 extending rearward from the ends of the first extension portions 2013 and connecting to the first rear tape 2012. With such a design, there is sufficient space between the tape connection portions 2013, 2014 to accommodate the power terminals 203, 303 and the tape connection portions at the rear ends of the signal terminals. The thicknesses of the ground terminals 201, 301 and the power terminals 203, 303 are greater than those of the signal terminals 202, 302, 204, 304.

[0066] S20. Electroplate the power terminals 203, 303 and the signal terminals respectively, and the electroplating layer includes rhodium ruthenium; electroplate the ground terminals 201, 301, and the electroplating layer includes gold.

[0067] In this step, the power terminals 203, 303 and the signal terminals have higher requirements for transmission ability and need to be electroplated with the precious metal rhodium ruthenium with better electroplating performance. The power terminals 203, 303 and the signal terminals can be electroplated separately or simultaneously; while the ground terminals 201, 301 have lower requirements for the ability to transmit signals or current, and only electroplating with the precious metal gold is sufficient.

[0068] S30. Stack the ground terminal 201, the power terminal 203, and the signal terminals 202, 204 of the first terminal group 20 together and electroplate and mold the first insulator 11; stack the ground terminal 301, the power terminal 303, the signal terminals 302, 304, and the metal middle plate 40 of the second terminal group 30 together and injection-mold the second insulator 12.

[0069] When forming the first insulator 11, the second front strip 2021 and the third front strip 2031 are superimposed together, and the first front strip 2011 is located on the outer periphery of the second and third front strips 2021 and 2031; the first to third rear strips 2012, 2022, and 2032 are superimposed and fixed together. To accurately superimpose the grounding terminal 201, the power supply terminal 203, and the signal terminal, a number of riveting holes can be provided in the first to third rear strips 2012, 2022, and 2032 so that they are riveted together and then injection molded. When forming the second insulator 12, similarly, the metal middle plate 40 and the second terminal group 30 can be fixed respectively. During injection molding, if there is a need for superimposing the strips, some parts of the strips need to be bent so that when they are superimposed, the grounding terminal, the power supply terminal, and the signal terminal can still maintain the predetermined planar positions.

[0070] S40. Cut off the first to third front strips 2011, 2021, 2031 and the second and third rear strips 2022, 2032 of the first terminal group 20; cut off the first to third front strips 3011, 3021, 3031 and the first to third rear strips 3021, 3022, 3023 of the second terminal group 30, and at the same time cut off the second connecting portion 403 of the middle plate strip to 401.

[0071] S50. Superimpose and fix the first terminal group 20 and its first insulator 11, the second terminal group 30, the metal middle plate 40, and its second insulator 12 up and down and then injection mold again to form the third insulator 13;

[0072] On the surface of the second insulator 12 close to the first insulator 11, there are support bosses 121 and terminal grooves 122, and the conductive terminals of the first terminal group 20 are limited within the support bosses 121 and the terminal grooves 122.

[0073] In this step, when cutting off the first rear strip 2012, the first extension 2013 and the second extension 2014 will not be cut off but will be formed within the first and / or third insulator 13.

[0074] The above are only the embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A reversible USB socket, comprising a metal middle plate, first and second terminal groups respectively located on both sides of the metal middle plate, and an insulating body that integrally forms the metal middle plate and the first and second terminal groups. The first and second terminal groups respectively and sequentially include a ground terminal, a high-frequency signal terminal, a power terminal, a conventional signal terminal, a power terminal, a high-frequency signal terminal, and a ground terminal in the lateral direction. Characterized in that, the thickness of the ground terminal and the power terminal is greater than the thickness of the high-frequency signal terminal and the conventional signal terminal. The ground terminals in the same row are stamped and formed into one body and gold-plated. The power terminals in the same row are stamped and formed into one body and rhodium-ruthenium-plated. The conventional signal terminals and high-frequency signal terminals in the same row are stamped and formed into one body and rhodium-ruthenium-plated. The gold-plated ground terminals, rhodium-ruthenium-plated power terminals, and rhodium-ruthenium-plated conventional signal terminals and high-frequency signal terminals are combined in the lateral direction to form the first or second terminal group; the part of the metal middle plate located between the power terminal and the conventional signal terminal is completely cut off, thereby forming two independent middle plate structures on the left and right; each independent metal middle plate includes a main plate portion extending in the plugging and unplugging direction, a protruding portion extending laterally outward from the front end of the main plate portion, a sunken portion formed at the rear end of the main plate portion, and a welding portion extending from the sunken portion; a thinned portion is formed by thinning the front edge of the main plate portion; a card slot for buckling with the plug is provided on the outer edge of the protruding portion, and a through hole is also provided on the protruding portion to facilitate the flow of plastic to hold the metal middle plate; except for the position where the protruding portion extends outward and penetrates the groove structure of the ground terminal, there is no metal middle plate between the ground terminals of the first and second terminal groups; the insulating body includes a first insulator that preforms the first terminal group into one body, a second insulator that preforms the second terminal group and the metal middle plate into one body, and a third insulator that forms the first insulator and the second insulator into one body; the first terminal group and its first insulator, the second terminal group, the metal middle plate and its second insulator are stacked and fixed up and down and then injection-molded again to form the third insulator; the first and second insulators form an air gap that penetrates in the plugging and unplugging direction at the stacking position.

2. The reversible USB socket according to claim 1, Characterized in that, the gold-plated ground terminals, rhodium-ruthenium-plated power terminals, and rhodium-ruthenium-plated high-frequency signal terminals and conventional signal terminals are respectively connected by three sets of strip materials after stamping and forming. When combining, the three sets of strip materials are stacked and combined for positioning.

3. The reversible USB socket according to claim 2, Characterized in that, the metal middle plate is separately stamped and formed and connected with a middle plate strip material, and the middle plate strip material is stacked and fixed with the strip material of the second terminal group.

4. The reversible USB socket according to claim 2 or 3, Characterized in that, at least one of the three sets of strip materials of the first terminal group is fixed together by riveting, and at least one of the three sets of strip materials of the second terminal group and the middle plate strip material are fixed together by riveting.

5. The reversible USB socket according to claim 4, It is characterized in that at least part of the three strip materials of the first and second terminal groups and the strip material of the metal middle plate are bent, so that when the strip materials are stacked, at least one side surface of the grounding terminal, power supply terminal, high-frequency signal terminal and conventional signal terminal is coplanar.

6. The reversible USB socket according to claim 1 It is characterized in that each conductive terminal of the first and second terminal groups includes a contact portion, a holding portion extending backward from the contact portion, and a welding leg extending out of the insulating body from the holding portion. The thicknesses of the grounding terminal and the power supply terminal are greater than the terminal thicknesses of the high-frequency signal terminal and the conventional signal terminal. The metal middle plate includes a main body plate portion located between the high-frequency signal terminals and a protruding portion extending laterally outward from the front end of the main body plate portion to the outside. The vertical projection of the rear end edge of the main body plate portion is located between the welding legs of the high-frequency signal terminals of the first terminal group and the welding legs of the high-frequency signal terminals of the second terminal group.

7. The reversible USB socket according to claim 6 It is characterized in that the first and second terminal groups are respectively located on the upper and lower sides of the metal middle plate, and the welding legs of the second terminal group are located behind the first terminal group.

8. The reversible USB socket according to claim 7 It is characterized in that the rear end of the holding portion of the first terminal group is bent downward and then extends parallel to form a bent portion. A sunken portion is formed by bending downward at the position corresponding to the bent portion of the first terminal group on the rear end of the main body plate portion of the metal middle plate. The rear end edge of the sunken portion is located between the welding legs of the high-frequency signal terminals of the first and second terminal groups in the vertical projection plane.

9. The reversible USB socket according to claim 8 It is characterized in that two flow holes are provided on the sunken portion of the metal middle plate. The insulating body includes a base portion, a docking tongue portion extending forward from the base portion, and a tail portion formed at the rear end of the base portion. A filling space is formed between the base portion and the tail portion. The sunken portion at the position of the flow holes is exposed in the filling space.

10. The reversible USB socket according to claim 9 It is characterized in that a groove structure is formed by thinning the grounding terminal at the position corresponding to the protruding portion to avoid the protruding portion so that the middle plate does not contact the grounding terminal. The sunken portion extends laterally outward to form an extending portion, and the extending portion extends out of the insulating body through between the grounding terminals of the first and second terminal groups to connect the strip material.

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