A USB socket

Abstract

A USB socket includes a metal shell and a plug inserted into the metal shell, the metal shell includes a ring body and a through hole passing through the ring body from front to back, the plug includes a first terminal group and a second terminal group arranged in two rows in the vertical direction, a middle plate arranged between the first terminal group and the second terminal group, and an insulating body for holding the first terminal group, the second terminal group and the middle plate as a whole, the insulating body includes a base, a butt tongue part extending forward from the base, a tail part located behind the base, and a partition part located between the base and the tail part, the base includes an extended rear section fitted on the inner wall surface of the ring body and an extended front section extending forward of the ring body, and a pair of lap parts are respectively formed on the upper and lower sides of the front end surface of the ring body and extend forward to be fitted on the surface of the extended front section. The application has simple structure and lower manufacturing cost.

Description

Technical Field

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

[0002] Chinese Patent Application No. 202411024158.2 discloses a waterproof USB socket, comprising conductive terminals arranged in two rows, a shielding plate disposed between two pairs of conductive terminals, a pair of shielding sheets respectively connected to the grounding terminals of the two rows of conductive terminals, and an insulating body that holds the conductive terminals, shielding plate, and shielding sheets together. The insulating body includes a base, a wrapping portion extending forward from the base, a mating tongue extending forward from the wrapping portion, and a tail extending backward from the base. The conductive terminals include... The shielding sheet includes an exposed contact portion on the outer surface of the mating tongue, a wrapped portion extending backward from the contact portion and enclosing the insulating body, and a weld foot extending backward from the wrapped portion out of the insulating body. The shielding sheet includes an overlapping portion and a spot welded portion formed by bending inward from the rear end of the overlapping portion laterally outward and then extending horizontally. A bending portion is formed between the overlapping portion and the spot welded portion. The spot welded portion is spot welded to the outer surface of the wrapped portion of the grounding terminal and electrically conductive. The overlapping portion is exposed on the outer surface of the wrapped portion to contact and conduct with the corresponding component of the plug to achieve grounding.

[0003] The aforementioned products require a separate shielding sheet and involve an additional spot welding process. Furthermore, the increased number of parts to be molded adds complexity to the injection molding process and can easily lead to quality issues.

[0004] Furthermore, the conductive terminals of existing USB sockets are generally injection molded after being connected at both ends by material strips. This means that the front end face of the conductive terminal cannot be electroplated before injection molding. After injection molding, the front end face of the conductive terminal is cut off and then embedded into the insulating body. However, the mating tongue is exposed. If sweat seeps into the insulating body, it will cause corrosion of the front end face of the conductive terminal, which may cause a fire risk if charging is required. Utility Model Content

[0005] Therefore, it is necessary to provide a USB socket that forms a shielded circuit by directly contacting the plug.

[0006] To solve the above-mentioned technical problems, this application provides a USB socket, including a metal shell and a connector inserted into the metal shell. The metal shell includes a ring and a through hole that passes through the ring from front to back. The connector includes a first terminal group and a second terminal group arranged in two rows in the vertical direction, a middle plate placed between the first terminal group and the second terminal group, and an insulating body that holds the first terminal group, the second terminal group, and the middle plate together. The insulating body includes a base, a mating tongue extending forward from the base, a tail located behind the base, and a partition located between the base and the tail. The base includes an extended rear section that adheres to the inner wall surface of the annular base and an extended front section that extends forward from the front of the annular base. The upper and lower sides of the front end surface of the ring have a pair of overlapping portions that adhere to the surface of the extended front section.

[0007] Preferably, the front end face of the overlapping portion is inclined to form a guide slope.

[0008] Preferably, the ring body includes an annular base and an outwardly folded-out portion formed from the rear end of the annular base. A pair of overlapping portions are formed by extending forward from the upper and lower sides of the front end of the annular base, respectively. The pair of overlapping portions are not connected and closed laterally on the outer sides. The through hole has an increased inner diameter width and an inclined surface at the position of the outwardly folded-out portion.

[0009] Preferably, the metal casing further includes a cover plate and an extension arm extending rearward from the top of the rear end of the ring body and the lateral side, respectively, and a receiving cavity formed by the cover plate and the extension arm. An annular groove for receiving a sealing ring is recessed on the front end face of the outward-turning baffle.

[0010] Preferably, the extension arm and the cover plate are integral structures. Each pair of extension arms includes an insertion groove open at the rear end and a support step formed at the front end of the insertion groove. A welding protrusion is formed on the bottom surface of the extension arm, and a limiting groove structure is provided on the rear end surface of the extension arm and the cover plate.

[0011] Preferably, the tail portion is housed within the receiving cavity, and positioning protrusions are formed on both lateral ends of the tail portion. The front end of the positioning protrusion forms a front positioning part, and the rear end of the positioning protrusion forms a rear positioning part. The rear positioning part extends rearward beyond the rear end edge of the tail portion. The positioning protrusion is inserted into the insertion groove of the extension arm, and the front positioning part is fixed to the abutment step at the front end of the insertion groove.

[0012] Preferably, the USB socket further includes a rear fixing plate, and the extension arm and the rear end face of the cover plate are provided with a limiting groove structure. The rear fixing plate is limited on the limiting groove structure and spot-welded to the metal shell. The rear positioning part of the positioning protrusion is fixed by the rear fixing plate.

[0013] Preferably, the partition is surrounded by the annular base and the inclined surface and sealed with adhesive to form a waterproof sealant. The waterproof sealant bonds the first terminal group, the second terminal group and a portion of the middle plate and is bonded to a portion of the inner wall surface of the annular base and the inclined surface.

[0014] Preferably, the metal housing further includes an ear extending outward from the outer side of the ring and the extension arm, the ear having a fixing hole, and the metal housing being fixed to a printed circuit board or other object through the ear and the fixing hole.

[0015] Preferably, the first terminal group and the second terminal group each include a contact portion exposed on the upper and lower surfaces of the mating tongue, a retaining portion extending rearward from the contact portion and embedded in the base and tail portion and connecting the base and tail portion, and a welding leg formed by bending from the retaining portion.

[0016] The USB socket of this application forms an overlapping portion that overlaps with the base surface of the insulating body by extending forward from the front end of the ring of the metal shell. The overlapping portion makes electrical contact with the plug to achieve a shielding path, which avoids the problems of complex process and high manufacturing cost caused by the need to embed a shielding sheet separately in the insulating body and weld it to the metal shell in the prior art. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a top view of the USB socket in this application;

[0019] Figure 2 This is an exploded perspective view of the USB socket of this application;

[0020] Figure 3 This is a perspective view of the metal casing of this application;

[0021] Figure 4 for Figure 3 The cross-sectional view shown by the dashed line BB;

[0022] Figure 5 This is a perspective view of the connector of the USB socket in this application;

[0023] Figure 6 For along Figure 1 The cross-sectional view shown by the dashed line AA;

[0024] Figure 7This is a side sectional view of the USB socket in this application;

[0025] Figure 8 This is a perspective view of the middle plate and its strip structure of the USB socket in this application;

[0026] Figure 9 A perspective view of the first insulator in the middle plate of the USB socket of this application, which is being injection molded for the first time.

[0027] Figure 10 This is a perspective view of the first terminal group of the USB socket of this application connected to the first insulator;

[0028] Figure 11 This is a perspective view of the USB socket of this application after the first terminal assembly is formed on the first insulator and the first terminal assembly material strip is cut off.

[0029] Figure 12 This is a perspective view of the USB socket of this application after the second terminal group is connected to the first insulator and the second insulator;

[0030] Figure 13 This is a perspective view of the USB socket of this application after the middle plate strip has been removed following injection molding of the second terminal group;

[0031] Figure 14 This is a perspective view of the USB socket connector of this application after it is installed inside the metal housing.

[0032] Explanation of reference numerals in the attached figures

[0033] Metal casing - 10; Ring body - 11; Through hole - 111; Inclined surface - 112; Annular base - 113; Outwardly turned stop - 114; Annular groove - 115; Overlapping part - 12; Cover plate - 13; Extension arm - 14; Insertion groove - 141; Supporting step - 142; Welding protrusion - 143; Limiting groove structure - 144; Ear - 15; Fixing hole - 151; Receiving cavity - 16; Sealing ring - 17; Connector - A; First terminal group - 30; First terminal strip - 31; Second insulator - 32; Second positioning groove - 321; Second terminal group - 20; Grounding terminal - 201; High-frequency terminal - 202; Power terminal - 203; Low-frequency terminal - 204; Contact part - 21; Solid Holding part-22; Welding foot-23; Second terminal strip-24; Middle plate-40; Plate body-41; Bending baffle-411; Through hole-412; Buckling part-413; Extension part-42; Welding foot-43; Middle plate strip-44; First insulator-45; Front end part-451; Rear end part-452; Support boss-453; Limiting groove-454; Flow hole-455; Insulating body-50; Base-51; Extended rear section-511; Extended front section-512; Protruding fitting part-513; Butt tongue-52; Tail-end-53; Positioning protrusion-531; Front positioning part-532; Rear positioning part-533; Partition part-54; Waterproof adhesive-60; Rear fixing plate-70. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them.

[0035] This application is based on Figure 2 As shown, the X direction is the vertical direction in front, the Y direction is the horizontal direction, and the Z direction is the vertical direction above.

[0036] Please see Figures 1 to 5 As shown, please refer to Figures 1 to 4 As shown, the USB socket of this application includes a metal housing 10 and a connector A inserted into the metal housing 10. The connector A includes a first terminal group 30 and a second terminal group 20 arranged in two rows correspondingly in the vertical direction, a middle plate 40 disposed between the first terminal group 30 and the second terminal group 20, a first insulator 45 separately formed on the middle plate 40 and electrically isolating the middle plate 40 from the first terminal group 30 and the second terminal group 20, and an insulating body 50 that holds the first terminal group 30, the second terminal group 20, the middle plate 40 and the first insulator 45 together.

[0037] Key references Figure 3 , Figure 4 As shown, the metal casing 10 includes a ring body 11, an overlapping portion 12 extending forward from the upper and lower sides of the front edge of the ring body 11, a cover plate 13 and an extension arm 14 extending backward from the top and lateral sides of the rear end of the ring body 11, an ear portion 15 extending laterally outward from the ring body 11 and / or the extension arm 14, a through hole 111 extending through the ring body 11 from front to back, and a receiving cavity 16 formed by the cover plate 13 and the extension arm 14 communicating with the through hole 111.

[0038] The ring body 11 includes an annular base 113 and an outwardly folded-out stop portion 114 formed from the rear end of the annular base 113. A pair of overlapping portions 12 extend forward from the upper and lower sides of the front end of the annular base 113, and the pair of overlapping portions 12 are vertically corresponding but not connected and closed laterally on their outer sides. The distance between the pair of overlapping portions 12 is consistent with the vertical height of the through hole 111 at the position of the annular base 113. The inner diameter of the through hole 111 is increased at the position of the outwardly folded-out stop portion 114, and an inclined surface 112 is formed therein. An annular groove 115 for accommodating a sealing ring 17 is recessed on the front end surface of the outwardly folded-out stop portion 114.

[0039] The extension arm 14 and the cover plate 13 are integrally formed. Each pair of extension arms 14 includes an insertion groove 141 open at the rear end and a supporting step 142 formed at the front end of the insertion groove 141. The insertion groove 141 communicates with the receiving cavity 16, and at least part of the upper and lower sides of the insertion groove 141 are covered. A welding protrusion 144 protrudes from the bottom surface of the extension arm 14. A limiting groove structure 144 is provided on the rear end face of the extension arm 14 and the cover plate 13. The limiting groove structure 144 is used to limit the rear fixing plate 70. The rear fixing plate 70 is snapped onto the limiting groove structure 144 and spot-welded to the metal shell 10. The limiting groove structure 144 uses a protruding and recessed structure to achieve the limiting function. The metal shell 10 of this application is preferably manufactured using powder metallurgy. However, in other embodiments, the metal shell 10 can also be formed using a sheet metal stretching process, i.e., a seamless tube structure with partially seamless sections is formed by stretching.

[0040] Please continue reading. Figures 2 to 9As shown, both the first terminal group 30 and the second terminal group 20 include a pair of grounding terminals 201 located on the outermost side, two pairs of high-frequency terminals 202 located inside the pair of grounding terminals 201, a pair of power terminals 203 located inside the high-frequency terminals 202, and a plurality of low-frequency terminals 204 located between the power terminals 203. The grounding terminals 201, high-frequency terminals 202, power terminals 203, and low-frequency terminals 204 are collectively referred to as conductive terminals. Each conductive terminal includes a contact portion 21, a retaining portion 22 extending rearward from the contact portion 21, and a solder foot 23 extending rearward from the retaining portion 22.

[0041] Key references Figure 8 As shown, the middle plate 40 consists of two independent structures, one on the left and one on the right. Each middle plate 40 includes a plate body 41, an extension portion 42 extending rearward from the plate body 41, and a welding leg 43 formed by bending downward from the rear end of the extension portion 42. The plate body 41 includes a bending baffle 411 formed by bending upward or downward from the front edge of the plate body 41, a through hole 412 penetrating the plate body 41, and a snap-fit ​​portion 413 formed on the lateral outer side of the plate body 41. A pair of middle plates 40 are connected as one unit by a middle plate strip 44. The middle plate strip 44 is connected to the lateral outer side of the plate body 41 and the extension portion 42 to maintain the front-to-back balance and stability of the middle plates 40. The middle plate strip 44 surrounds the outer periphery of the middle plates 40.

[0042] Please refer to this carefully. Figure 5 As shown, the insulating body 50 includes a base 51, a mating tongue 52 extending forward from the base 51, a tail 53 located behind the base 51, and a partition 54 separating the base 51 and the tail 53. The base 51 includes a rearwardly extending rear section 511 and a frontwardly extending front section 512. The rearwardly extending rear section 511 protrudes laterally outward to form a protruding fitting portion 513. The tail 53 is connected to the base 51 only through the first terminal group 30, the second terminal group 20, and the middle plate 40 to form the partition 54. The tail 53 has positioning protrusions 531 extending laterally at both ends in the front-rear direction. The positioning protrusions 531 include a front positioning portion 532 and a rear positioning portion 533. The rear positioning portion 533 extends rearward beyond the rear end face of the tail 53.

[0043] The outer surfaces of the contact portions 21 of the first terminal group 30 and the second terminal group 20 are exposed on the upper and lower surfaces of the mating tongue portion 52, respectively. The retaining portion 22 is embedded in the insulating body 50 and extends from the base portion 51 to the tail portion 53. The solder foot 23 is formed by bending and extending from the retaining portion 22.

[0044] Key references Figure 6 , Figure 7 As shown, the connector A of this application is inserted into the through hole 111 of the metal housing 10 from back to front. At this time, the extended rear section 511 of the base 51 is attached to the inner surface of the annular base 113 of the ring body 11, including the protruding fitting portion 513 attached to the arc-shaped inner surface on both sides of the annular base 113. The extended front section 512 extends out of the front of the annular base 113. The upper and lower surfaces of the extended front section 512 are covered by the overlapping portion 12. The partition portion 54 is surrounded inside the ring body 11, that is, the partition portion 54 is partially surrounded by the annular base 113 and the inclined surface 112. The tail portion 53 is accommodated within the receiving cavity 16. Positioning protrusions 531 on both sides of the tail portion 53 are inserted into the insertion slots 141 of the extension arm 14, with the front positioning portion 532 of the positioning protrusion 531 abutting against the abutting step 142 of the insertion slot 141. The rear positioning portion 533 does not extend beyond the rear end edge of the extension arm 14. The rear fixing plate 70 is inserted into the limiting groove structure 144 behind the cover plate 13 and the extension arm 14 and fixed by spot welding. The rear positioning portion 533 of the positioning protrusion 531 is limited and fixed by the rear fixing plate 70.

[0045] Waterproof adhesive 60 is injected from the lower side of the receiving cavity 16, filling the partition portion 54 to form a waterproof layer. This adhesive bonds the first terminal group 30, the second terminal group 20, the middle plate 40, and the inner surface of the ring body 11 to form a waterproof structure. The cured adhesive forms waterproof adhesive 60, which is then bonded to a portion of the annular substrate 113 and the inner surface of the inclined surface 112. The sealing ring 17 can be fitted into the annular groove 115 of the outward-facing baffle portion 114, or it can be integrally formed within the annular groove 115 by dispensing adhesive. The sealing ring 17 and the waterproof adhesive 60 at least partially overlap in cross-section.

[0046] In this application, the metal casing 10 and the USB socket extend forward from the front end of the ring body 11 to form an overlapping portion 12 that overlaps the surface of the base 51 of the insulating body 50. The overlapping portion 12 makes electrical contact with the docking plug to achieve a shielding path, avoiding the problems of complex processes and high manufacturing costs caused by the need to embed a shielding sheet separately in the insulating body 50 and weld it to the metal casing 10 for conduction in the prior art.

[0047] The manufacturing method of the USB socket in this application will be implemented through... Figures 8 to 14 The manufacturing method of the USB socket in this application includes the following steps:

[0048] S10: Provide a middle plate 40 with a middle plate strip 44 connected to it, and injection mold a first insulator 45 on the middle plate 40.

[0049] The middle plate strip 44 is connected to the middle plate 40 at two positions on the lateral outer side of the middle plate 40 to maintain the balance of the middle plate 40; the first insulator 45 combines a pair of middle plates 40 together, the first insulator 45 includes a front end 451 and a rear end 452, the upper and lower surfaces of the front end 451 are formed with a plurality of supporting bosses 453, the upper and lower surfaces of the rear end 452 are respectively formed with a plurality of limiting grooves 454, the supporting bosses 453 correspond to the limiting grooves 454, the supporting bosses 453 are used to support the contact portion 21 of the first terminal group 30 and the second terminal group 20, the limiting grooves 454 are used for the holding portion 22 of the first terminal group 30 and the second terminal group 20 to be locked and limited, the function of the supporting bosses 453 and the limiting grooves 454 is to prevent the first terminal group 30 and the second terminal group 20 from being positioned during injection molding and to prevent the conductive terminals from shifting. A flow hole 455 is also provided between the front end 451 and the rear end 452 of the first insulator 45 to facilitate the flow of plastic in subsequent processes.

[0050] S20, the first terminal group 30 connected with the first terminal strip 31 and the second terminal group 20 connected with the second terminal strip 24 are respectively fixed to the lower surface and the upper surface of the first insulator 45 to injection mold the insulating body 50 and obtain the plug A. After molding, the first terminal strip 31 and the middle plate strip 44 are cut off.

[0051] This step includes two implementation methods. One method is to simultaneously fix the first terminal group 30 and the second terminal group 20 to both sides of the insulating body 50 and then injection mold the insulating body.

[0052] Another implementation includes the following two sub-steps:

[0053] S201. Fix the first terminal group 30 with the first terminal strip 31 to the lower and upper surfaces of the first insulator 45 and injection mold the second insulator 32. After molding, cut off the first terminal strip 31.

[0054] In this step, the contact portion 21 of each conductive terminal of the first terminal group 30 is supported on the support boss 453, and the retaining portion 22 is clamped in the limiting groove 454 to keep the conductive terminal of the first terminal group 30 in a predetermined position under the impact of molten plastic.

[0055] The first terminal strip 31 is connected to the solder foot 23 at the rear end of the first terminal group 30. The first terminal strip 31 is attached and fixed together with the middle plate strip 44. The front end of the contact portion 21 of the first terminal group 30 is not connected to the first terminal strip 31, so that the front end of the contact portion 21 of the first terminal group 30 can be electroplated during electroplating and will not be unable to be electroplated due to the connection of the strip.

[0056] The second insulator 32 is fixed together with the extension 42 of the middle plate 40 at the rear end of the retaining part 22, and an auxiliary limiting groove 321 is provided on the upper surface of the second insulator 32.

[0057] S202. Fix the second terminal group 20 with the second terminal strip 24 connected to it to the upper side of the insulating body 50 and the first insulator 45, and perform injection molding of the insulating body 50. After molding, cut off the middle plate strip 44.

[0058] In this step, the contact portion 21 of each conductive terminal of the second terminal group 20 is supported on the support boss 453, and the retaining portion 22 is clamped in the limiting groove 454 and the auxiliary limiting groove 321 to keep the conductive terminal of the second terminal group 20 in a predetermined position under the impact of molten plastic.

[0059] The second terminal strip 24 is connected to the solder foot 23 at the rear end of the second terminal group 20. The second terminal strip 24 is attached and fixed together with the middle plate strip 44. The front end of the contact portion 21 of the second terminal group 20 is not connected to the second terminal strip 24, so that the front end of the contact portion 21 of the second terminal group 20 can be electroplated during electroplating and will not be unable to be electroplated due to the connection of the strip.

[0060] Finally, the middle plate strip 44 surrounding the outer periphery of the connector A is cut off, and the first terminal strip 24 of the first terminal group 20 is retained. The first terminal strip 24 is located only behind the solder foot 23.

[0061] S30. Provide the metal housing 10, insert the connector A into the metal housing 10 from back to front, provide a rear fixing plate 70, and weld the rear fixing plate 70 to the rear end face of the metal housing 10 to restrict the connector A from exiting.

[0062] S40. Glue is injected into the partition portion 54 of the insulating body 50 surrounding the ring body 11 of the metal shell 10 to form waterproof glue 60, and the first terminal strip 24 is cut off to obtain the finished product.

[0063] The manufacturing method of the USB socket in this application connects the first terminal strip 31 and the second terminal strip 24 only to the solder feet 23 at the rear end of the first terminal group 30 and the second terminal group 20, so that the front end surfaces of the first terminal group 30 and the second terminal group 20 can be electroplated and wrapped, reducing the risk of electrochemical corrosion and fire caused by exposure of the front end surfaces of conductive terminals.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above embodiments only illustrate preferred implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A USB socket comprising a metal housing and a plug inserted into the metal housing, the metal housing comprising a ring body and a through hole passing through the ring body from front to back, the plug comprising a first terminal group and a second terminal group arranged in two rows in a vertical direction, a middle plate disposed between the first terminal group and the second terminal group, and an insulating body holding the first terminal group, the second terminal group and the middle plate as a whole, the insulating body comprising a base, a mating tongue portion extending forward from the base, a tail portion located behind the base, and a partition portion located between the base and the tail portion, the base comprising an extended rear section fitted on an inner wall surface of the ring body and an extended front section extending forward of the ring body, characterized in that, The front end surface of the ring body is extended forward to form a pair of overlapping parts on the surface of the extended front section.

2. The USB receptacle of claim 1, wherein, The front end surface of the overlapping part is formed with a guide slope.

3. The USB receptacle of claim 1, wherein, The ring body comprises a ring-shaped base and an outwardly folded blocking part formed by folding the rear end of the ring-shaped base outwardly, and a pair of overlapping parts formed by extending the upper and lower sides of the front end of the ring-shaped base forward, respectively.

4. The USB receptacle of claim 3, wherein, The metal shell further comprises a cover plate and an extension arm formed by extending the top and lateral sides of the rear end of the ring body rearward, respectively, and a receiving cavity surrounded by the cover plate and the extension arm.

5. The USB receptacle of claim 4, wherein, The extension arm and the cover plate are an integral structure, and a pair of the extension arm comprises an insertion slot with an open rear end and a resisting step formed at the front end of the insertion slot.

6. The USB receptacle of claim 5, wherein, The tail is received in the receiving cavity, and positioning lugs are formed on the lateral ends of the tail by protruding outwardly, and a front positioning part is formed at the front end of the positioning lugs, and a rear positioning part is formed at the rear end of the positioning lugs, which protrudes rearward beyond the rear end of the tail.

7. The USB receptacle of claim 6, wherein, The USB socket further comprises a rear fixing plate, and a limiting groove structure is arranged on the rear end surface of the extension arm and the cover plate, and the rear fixing plate is limited on the limiting groove structure and is spot-welded with the metal shell, and the rear positioning part of the positioning lugs is fixed by the rear fixing plate.

8. The USB receptacle of claim 4, wherein, The partition part is surrounded by the ring-shaped base and the slope, and waterproof glue is injected to form a waterproof glue seal, and the waterproof glue bonds the first terminal group, the second terminal group and the middle plate part region, and bonds the inner wall surface of part of the ring-shaped base and the slope.

9. The USB receptacle of claim 8, wherein, The metal shell further comprises an ear part formed by extending outwardly from the lateral side of the ring body and the extension arm, and a fixing hole is formed on the ear part, and the metal shell is fixed on a printed circuit board or other object through the ear part and the fixing hole.

10. The USB receptacle of claim 9, wherein, The first terminal group and the second terminal group respectively comprise a contact part exposed on the upper and lower surfaces of the docking tongue part, a holding part extended rearward from the contact part and embedded in the base part and the tail part and connecting the base part and the tail part, and a soldering leg formed by bending the holding part.

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