Shell-free USB socket and electronic equipment

Abstract

A shell-free USB socket and an electronic device, the shell-free USB socket comprises a plug connector and a shielding sleeve sleeved outside the plug connector, the plug connector comprises a first terminal group, a second terminal group and an insulation body for fixedly holding the first terminal group and the second terminal group into a whole, the insulation body comprises a wrapping part, a butt joint tongue part formed by extending forwards from the wrapping part, a tail part located behind the wrapping part and an isolation section formed between the wrapping part and the tail part, and the shielding sleeve comprises an annular wall, a through hole penetrating front and back and a folding part formed by folding outwards from the rear end of the annular wall. The shielding sleeve is sleeved outside the wrapping part and the isolation section, and the isolation section is filled with waterproof glue to realize waterproofness. The USB socket without the shell has the advantages of waterproof performance, reduced product size, simple structure, low cost and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electrical connectors, in particular to a shell-less USB socket and electronic equipment. BACKGROUND

[0002] The Type C USB socket supports plug-in and high-speed data transmission in both directions. The conventional USB socket includes a first terminal group, a second terminal group, a metal plate located between the first terminal group and the second terminal group, an insulating body for holding the first terminal group, the second terminal group, and the metal plate together, and a metal shell sleeved outside the insulating body. To adapt to some small size application environment, the patent CN118431835A discloses a simplified technical solution of the metal shell, which sets shielding sheets on the upper and lower surfaces of the insulating body for conducting ground with the USB plug, extends the shielding sheets backward to form spot welding parts, sets a metal shell only sleeved on the rear end of the insulating body, and spot welds the spot welding parts and the metal shell together to enhance the stability of the insulating body and the metal shell, so that the mating tongue part and the wrapping part of the insulating body are exposed outside the metal shell, the external space of the mating tongue part originally occupied by the metal shell is utilized by the shell of the electronic equipment, and the size space of the electronic equipment is reduced. The technical solution includes shielding sheets and a metal shell, which increases the complexity of components and assembly in actual application. The patent CN218472375U discloses a shell-less USB socket, in order to increase the strength of the ear part of the insulating body, a metal reinforcing part is integrally formed in the base part of the insulating body and embedded in the base part, and the metal reinforcing part is used to enhance the strength of the insulating body and the ear part, so that the insulating body can maintain good strength when fixed on the printed circuit board. SUMMARY

[0003] Therefore, it is necessary to provide a shell-less USB socket and electronic equipment with simple structure and small product size.

[0004] To solve the above technical problems, the present application provides a shell-less USB socket, which includes a plug-in part and a shielding sleeve sleeved outside the plug-in part. The plug-in part includes a first terminal group, a second terminal group, and an insulating body for holding the first terminal group and the second terminal group together. The insulating body includes a wrapping part, a mating tongue part extending forward from the wrapping part, a tail part located rearward of the wrapping part, and a separation section formed between the wrapping part and the tail part. The shielding sleeve includes an annular wall, a through hole passing through the front and rear, and a folded part folded outward from the rear end of the annular wall. The shielding sleeve is sleeved outside the wrapping part and the separation section, and the separation section is filled with waterproof glue to achieve waterproofing.

[0005] Preferably, the tail portion and the wrapping portion are connected as a whole by the first terminal group and the second terminal group, and the first terminal group and the second terminal group are exposed to the outside in the isolation section.

[0006] Preferably, the shielding sleeve is at least partially sleeved on the periphery of the isolation section, and the waterproof adhesive is bonded between the first terminal group, the second terminal group and the inner surface of the annular wall to achieve waterproofing after filling the isolation section.

[0007] Preferably, the tail portion extends towards the lateral outside to form an ear portion, a metal sheet is integrally embedded in the ear portion, and the metal sheet is at least partially exposed to a welding end surface on the tail end surface of the insulating body, and the welding end surface is used for connecting a material belt during the manufacturing process.

[0008] Preferably, a sealing ring is mounted or formed on the front side of the folded portion of the shielding sleeve, the outer edge of the folded portion extends to form a spot welding portion contacting the welding end surface, the spot welding portion is welded as a whole with the welding end surface by spot welding, and the shielding sleeve is grounded through the metal sheet.

[0009] Preferably, the first terminal group and the second terminal group respectively include a contact portion exposed to the upper and lower surfaces of the butt tongue portion, a wrapped portion extending rearward from the contact portion and wrapped in the wrapping portion and the tail portion, and a welding portion extending downward and rearward from the rear end of the wrapped portion, the welding portions of the first terminal group and the second terminal group are arranged in two rows in the transverse direction, the welding portions of the first terminal group located above are located rearward of the welding portions of the second terminal group, and the surfaces of the welding portions of the first terminal group and the second terminal group are on the same horizontal plane; the first terminal group and the second terminal group respectively include a pair of grounding terminals located at the outermost side, two pairs of high-speed signal terminals located inward of the pair of grounding terminals, a pair of power supply terminals located inward of the two pairs of high-speed signal terminals, and a plurality of conventional signal terminals located between the pair of power supply terminals.

[0010] Preferably, the USB socket further comprises a metal middle plate between the first terminal group and the second terminal group, the metal middle plate comprises a plate body extending in the front-rear direction and located between the high-speed signal terminals of the first terminal group and the high-speed signal terminals of the second terminal group, a buckle portion extending outward from the middle of the pair of grounding terminals and exposed to the outside of the insulating body from the front end of the plate body, a clamping groove formed on the buckle portion, and a reinforcing arm embedded in the tail portion from the rear end of the plate body along the lateral outside.

[0011] Preferably, the tail part extends laterally outward to form an ear part, the ear part is formed with a first fixing hole, the reinforcing arm is provided with a fixing end at the ear part, the fixing end is provided with a second fixing hole corresponding to the first fixing hole, and the first fixing hole and the second fixing hole jointly form a fixing hole for fixing the USB socket by a bolt.

[0012] Preferably, the reinforcing arm is located between the wrapped part of the first terminal group and the welding part of the second terminal group, the reinforcing arm is provided with a welding end face exposed on the front end face of the tail part, the front side of the folded part of the shielding sleeve is provided with a sealing ring, the outer edge of the folded part extends to form a spot welding part in contact with the welding end face, the spot welding part and the welding end face are welded integrally by spot welding, and the shielding sleeve is grounded through the metal middle plate.

[0013] Preferably, the rear end of the plate body is formed with a narrowed part, the reinforcing arm is connected to the rear end of the narrowed part, the width of the narrowed part is smaller than the width of the plate body part, the narrowed part is located in the isolation section and exposed to the outside, and the waterproof adhesive is also bonded to the narrowed part; the front side of the tail part is formed with an abutting face, and the rear end face of the folded part of the shielding sleeve is limited by abutting on the abutting face.

[0014] To solve the above technical problems, the application further provides an electronic device, which comprises a device outer frame, electronic components installed in the device outer frame, and the aforementioned USB socket without a shell, the device outer frame is formed with a USB hole, the USB socket is installed in the electronic device, the connecting tongue part and the wrapped part of the USB socket are accommodated in the USB hole, the outer periphery of the shielding sleeve and the front of the folded part are provided with a sealing ring, the sealing ring is pressed between the rear end face of the outer periphery of the USB hole and the folded part to achieve waterproofing, and the USB socket is fixed on a printed circuit board or other objects in the electronic device.

[0015] The USB socket without a shell and the electronic device of the application achieve waterproofing by sleeving the shielding sleeve outside the wrapped part and the isolation section and filling waterproof adhesive, support the extrusion waterproofing between the shielding sleeve and the device outer frame by folding the outer periphery of the shielding sleeve to form a folded part, cancel the traditional metal shell, reduce the size of the product, replace the base position of the original insulating body which needs to fix the metal shell with the isolation section, cancel the base of the insulating body, greatly shorten the length of the USB socket, guarantee the waterproof performance, reduce the product size, the number of components, and the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0017] Figure 1 A perspective assembly view of the USB socket without housing according to the present application;

[0018] Figure 2 A perspective assembly view of the USB socket without housing according to the present application;

[0019] Figure 3 A perspective assembly view of the USB socket without housing according to the present application;

[0020] Figure 4 A perspective assembly view of the USB socket without housing according to the present application;

[0021] Figure 5 A perspective assembly view of the USB socket without housing according to the present application;

[0022] Figure 6 A perspective assembly view of the USB socket without housing according to the present application;

[0023] Figure 7 A perspective assembly view of the USB socket without housing according to the present application;

[0024] Figure 8 A perspective assembly view of the USB socket without housing according to the present application;

[0025] Figure 9 A perspective assembly view of the USB socket without housing according to the present application;

[0026] Figure 10 A perspective assembly view of the USB socket without housing according to the present application;

[0027] Figure 11 A perspective assembly view of the USB socket without housing according to the present application;

[0028] BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Shielding sleeve-10; sealing ring-101; waterproof glue-102; annular wall-11; through hole-12; folding part-13; ring groove-14; convex ring-15; spot welding part-16; insulating body 20; wrapping part-21; butt joint tongue-22; tail-23; ear-24; first fixing hole-241; isolation section-25; glue injection port-26; first plastic body-201; second plastic body-202; avoiding groove-29; metal middle plate-30; plate body-31; thin part-311; narrow part-312; buckle part-32; clamping groove-33; flow-through hole-34; reinforcing arm-35; fixed end-36; second fixing hole-361; welding leg-37; welding end face-38; first terminal group-40; second terminal group-50; contact part-41; wrapped part-42; welding part-43; concave section-44; ground terminal-401; high-speed signal terminal-402; power supply terminal-403; conventional signal terminal-404; device outer frame-60; USB hole-61; rear end face-62. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with specific embodiments of the present application and corresponding drawings.

[0031] Please refer to Figure 1 The shellless USB socket of the present application includes a plug-in part A, a shielding sleeve 10 sleeved outside the plug-in part A, waterproof glue 102 filled in the rear side of the shielding sleeve 10 and the plug-in part A, and a sealing ring 101 sleeved outside the rear end of the shielding sleeve 10. Figure 1 As shown in the drawings, the X direction is the longitudinal direction of the front end, the Y direction is the transverse direction, and the Z direction is the vertical direction.

[0032] Please refer to Figures 1 to 4 The shellless USB socket of the present application includes a plug-in part A, a shielding sleeve 10 sleeved outside the plug-in part A, waterproof glue 102 filled in the rear side of the shielding sleeve 10 and the plug-in part A, and a sealing ring 101 sleeved outside the rear end of the shielding sleeve 10.

[0033] The shielding sleeve 10 includes an annular wall 11, a through hole 12 penetrating through the front and rear, and a folding part 13 formed by folding outward from the rear end of the annular wall 11. The outer diameter of the folding part 13 is greater than the outer diameter of the annular wall 11. The folding part 13 is formed by folding vertically outward from the rear end of the annular wall 11, the outer edge of the folding part 13 is folded forward to form a convex ring 15, and the front side of the folding part 13 is located between the convex ring 15 and the outer surface of the annular wall 11 to form a ring groove 14. The convex ring 15 continues to extend outward on both sides in the transverse direction to form a pair of spot welding parts 16, and the spot welding parts 16 are plate-shaped structures.

[0034] Please continue to refer to Figures 3 to 7As shown, the plug-in A includes a first terminal group 40, a second terminal group 50 disposed below the first terminal group 40, a metal middle plate 30 disposed between the first terminal group 40 and the second terminal group 50, and an insulating body 20 holding the first terminal group 40, the second terminal group 50 and the metal middle plate 30 as a whole.

[0035] The insulating body 20 includes a wrapping portion 21 sleeved in the through hole 12 of the shielding sleeve 10, a butt joint tongue portion 22 extending forward from the wrapping portion 21, a tail portion 23 formed at the rear of the wrapping portion 21, ear portions 24 extending along the two lateral sides from the tail portion 23, and a partition segment 25 partitioning the wrapping portion 21 and the tail portion 23. The upper side of the partition segment 25 extends rearward into the tail portion 23 so that a glue injection opening 26 is formed on the upper side of the tail portion 23, and the front end faces of the two lateral sides of the tail portion 23 are formed with abutting faces 27 abutting against the shielding sleeve 10. The ear portions 24 are vertically penetrated by first fixing holes 241.

[0036] Please refer to Figure 6 、 Figure 7 As shown, the first terminal group 40 and the second terminal group 50 include, along the length direction, contact portions 41 exposed on the upper and lower surfaces of the butt joint tongue portion 22, wrapped portions 42 extending rearward from the contact portions 41 and wrapped in the wrapping portion 21 and the tail portion 23, and welding portions 43 bent from the rear ends of the wrapped portions 42. The first terminal group 40 and the second terminal group 50 respectively include a pair of grounding terminals 401 located at the outermost lateral sides, two pairs of high-speed signal terminals 402 located inside the pair of grounding terminals 401, a pair of power supply terminals 403 located inside the two pairs of high-speed signal terminals 402, and a conventional signal terminal 404 located between the pair of power supply terminals 403. The widths and thicknesses of the grounding terminals 401 and the power supply terminals 403 are greater than those of the high-speed signal terminals 402 and the conventional signal terminal 404.

[0037] Please refer to Figure 6As shown, the metal middle plate 30 includes a plate body 31 disposed between the high-speed signal terminals 402 of the first terminal group 40 and the second terminal group 50, a clamping portion 32 extending from the front end of the plate body 31 to the lateral outside and beyond the ground terminals 401, a clamping groove 33 formed on the outside of the clamping portion 32 and exposed to the lateral outside of the insulating body 20, a reinforcing arm 35 connected to the rear end of the plate body 31, and a fixed end 36 formed on the lateral outside of the reinforcing arm 35. The front end of the plate body 31 is partially thinned to form a thinned portion 311 to avoid the front end embedded portion of the high-speed signal terminal 402, and the clamping portion 32 is formed with a flow-through hole 34 for the flow of molten plastic. The reinforcing arm 35 extends outwardly in the lateral direction, the fixed end 36 is formed with a second fixed hole 261, and the rear end of the reinforcing arm 35 is further bent downwardly to form a soldering leg 37. The reinforcing arm 35 and the rear end of the plate body 31 are connected integrally through a narrow-width narrowed portion 312, which is located at the position of the isolation section 25. At the same time, the inside of the reinforcing arm 35 is located between the wrapped portion 41 of the first terminal group 40 and the soldering portion 43 of the second terminal group 50, and continues to play a shielding performance to reduce the crosstalk between the two rows of high-speed signal terminals 402. The reinforcing arm 35 is wrapped by the tail portion 23 of the insulating body 20, that is, the reinforcing arm 35 is embedded in the tail portion 23 to strengthen the strength of the insulating body 20. Specifically, the fixed end 36 is embedded in the ear portion 24 of the insulating body 20, and the second fixed hole 361 and the first fixed hole 241 together form a fixed hole for bolt insertion locking. The front end face of the reinforcing arm 35 close to the fixed end 36 is provided with a soldering end face 38, which can be used for connecting the material belt during production and manufacturing. After injection molding, the material belt is cut off and the soldering end face 38 is exposed outside the insulating body 20.

[0038] The wrapped portion 42 of the ground terminals 401 and power terminals 403 of the first terminal group 40 and the second terminal group 50 is formed with an inner recessed section 44 recessed to the middle, so that the ground terminals 401 and power terminals 403 of the first terminal group 40 and the ground terminals 401 and power terminals 403 of the second terminal group 50 are in direct contact, and the outer surface of the inner recessed section 44 is closer to the inside than the outer surface of the contact portion 41. When the insulating body 20 is injection molded, the plastic will cover the inner recessed section 44 so that it is not exposed outside the insulating body 20, avoiding the problem of electrolytic damage to the surface plating caused by sweat infiltration into the conductive terminals.

[0039] For reference Figure 4 , Figure 5As shown, the connector A further comprises a first plastic body 201 holding the first terminal group 40 and the metal middle plate 30 together, and a second plastic body 202 holding the second terminal group 50 together. Then the first plastic body 201 and the second plastic body 202 are combined together and then injection molded to form the insulating body 20. The first plastic body 201 and the second plastic body 202 correspond to the isolation section 25 of the insulating body 20 and are not attached with plastic material, so that the first terminal group 40, the second terminal group 50 and the metal middle plate 30 are exposed to the outside at the isolation section 25. The narrowed portion 312 of the metal middle plate 30 is located at the position of the isolation section 25 and is exposed to the outside. The bottom surface of the tail section 23 of the insulating body 20 is concave upward to form an avoiding groove 29, and the avoiding groove 29 is located at the position of the soldering sections 43 of the first terminal group 40 and the second terminal group 50. Specifically, after the first plastic body 201 and the second plastic body 202 are combined together, the soldering sections 43 of the first terminal group 40 are arranged at the rear end of the avoiding groove 29 in the transverse direction, the soldering sections 43 of the second terminal group 50 are arranged at the front side of the avoiding groove 29 in the transverse direction, and the surfaces of the soldering sections 43 of the first terminal group 40 and the second terminal group 50 are in the same horizontal plane to be attached and soldered to a circuit board. The avoiding groove 29 can reduce the overall thickness of the product and reduce the size.

[0040] For emphasis Figures 8 to 10 As shown, after the connector A is manufactured, the shielding sleeve 10 is a seamless tube structure, the shielding sleeve 10 is sleeved from the front to the wrapping section 21 of the insulating body 20, and the shielding sleeve 10 covers at least part of the isolation section 25, so that at least part of the isolation section 25 is surrounded by the annular wall 11 of the shielding sleeve 10. The folded portion 13 of the shielding sleeve 10 abuts against the front end surface of the tail section 23 of the insulating body 20 to limit the position, and the spot welding portion 16 on the lateral outer side of the folded portion 13 is lapped on the soldering end surface 38 exposed on the front end surface of the tail section 23, so that the shielding sleeve 10 and the reinforcing arm 35 are welded and fixed together by spot welding from the front end side.

[0041] In order to achieve good waterproof performance, the waterproof glue 102 is injected from the glue injection hole 26 of the tail part 23 of the insulating body 20, and the waterproof glue 102 is filled into the isolation section 25 surrounded by the annular wall 11 of the shielding sleeve 10, and is bonded to the portions of the first terminal group 40, the second terminal group 50, and the metal middle plate 30 located at the position, and is bonded to the inner wall surface of the surrounding annular wall 11 to achieve waterproof performance, so as to avoid water from penetrating from the joint between the insulating body 20 and the conductive terminal group 40, 50 and the metal middle plate 30. The narrowed part 312 of the metal middle plate 30 is also bonded by the waterproof glue 102, and the waterproof glue forms a waterproof glue block after UV curing. The front end surface of the folded part 13 of the shielding sleeve 10 is provided with a sealing ring 101. The sealing ring 101 can be directly sleeved on the shielding sleeve 10 by using a formed sealing ring, or can be formed by dispensing on the front end surface of the folded part 13 of the shielding sleeve 10. The dispensing process is a prior art, that is, the USB socket is vertically placed, and the dispensing is performed on the folded part 13 for one circle, and then the formed is cured. Here, details are not described.

[0042] In an embodiment, the plate body 31 of the metal middle plate 30 and the reinforcing arm 35 can be a split structure, that is, the plate body 31 and the reinforcing arm 35 are independent parts. In the implementation, the reinforcing arm 35 can be a metal sheet, and the metal sheet is partially exposed to the front end of the tail part 23 and is welded and fixed to the spot welding part 16 of the shielding sleeve 10. Alternatively, the reinforcing arm 35 is actually not necessary, and the structure of the reinforcing arm 35 can be omitted, and the rear end of the plate body 31 extends to the inner surface of the annular wall 11 and is welded and fixed to the annular wall 11.

[0043] Please refer to Figure 11 The application also includes an electronic device including a device frame 60, electronic components and the USB socket installed in the device frame 60, and the device frame 60 is formed with a USB hole 61. The USB socket is installed in the electronic device, the mating tongue part 22 and the wrapping part 21 of the USB socket are inserted into the USB hole 61, the sealing ring 101 is pressed on the rear end surface 62 of the outer periphery of the USB hole 61 to achieve waterproof performance, and the USB socket is locked on a printed circuit board or an object in the electronic device through the fixing holes 241, 361.

[0044] The shell-free USB socket of the application realizes waterproof by sleeving a shielding sleeve 10 outside the wrapping part 21 and the isolation section 25 and filling waterproof glue, and realizes extrusion waterproof between the folding part 13 formed by folding the periphery of the shielding sleeve 10 and the equipment outer frame 50 by supporting, cancels the traditional metal shell, reduces the size of the product, replaces the base position of the original insulation body which needs to fix the metal shell as the isolation section, cancels the base of the insulation body, greatly shortens the length of the USB socket, guarantees the waterproof performance, reduces the product size, reduces the number of components, and reduces the manufacturing cost.

[0045] The metal middle plate 30 and the USB socket of the application directly extend the metal middle plate 30 at the rear end to form an integrated reinforcing arm 35, strengthen the strength of the tail part 23 of the insulation body 20 through the reinforcing arm 35, and strengthen the locking strength of the fixing hole 241,361, which is simpler and lower in cost than the traditional structure of separately embedding a metal sheet.

[0046] In an embodiment, the application is also applicable to other types of IO connectors, that is, other USB sockets except Type C connectors, such as Micro USB sockets, at this time, the first terminal group 40 and the second terminal group 50 are replaced by one terminal group, collectively referred to as a conductive terminal group.

[0047] The technical features of the above embodiments can be combined in any manner, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0048] The above embodiments only express the preferred embodiments of the application, which are described in detail and specifically, but should not be understood as a limitation on the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the patent of the present application should be subject to the appended claims.

Claims

1. A housingless USB receptacle comprising a plug member and a shield sleeve fitted to the plug member, the plug member comprising a first terminal group, a second terminal group, and an insulating body that holds the first terminal group and the second terminal group as one, characterized in that, The insulating body comprises a wrapping part, a butt joint tongue part extending forward from the wrapping part, a tail part behind the wrapping part, and an isolation section between the wrapping part and the tail part; the shielding sleeve comprises an annular wall, a through hole extending from front to back, and a folded part folded outward from the rear end of the annular wall; the shielding sleeve is sleeved outside the wrapping part and the isolation section, and the isolation section is filled with waterproof glue to achieve waterproofing.

2. The housing-less USB receptacle of claim 1, wherein, The tail part and the wrapping part are connected into one through the first terminal group and the second terminal group, and the first terminal group and the second terminal group are exposed to the outside in the isolation section.

3. The housing-less USB receptacle of claim 2, wherein, The shielding sleeve is at least partially sleeved outside the periphery of the isolation section, and the waterproof glue is bonded between the first terminal group, the second terminal group and the inner surface of the annular wall after filling the isolation section to achieve waterproofing.

4. The housing-less USB receptacle of claim 3, wherein, The tail part extends to form an ear part towards the lateral outside, and a metal sheet is integrally embedded in the ear part; the metal sheet is at least partially exposed to a welding end surface on the front end surface of the tail part of the insulating body, and the welding end surface is used for connecting a material belt in the manufacturing process.

5. The housing-less USB receptacle of claim 4, wherein, The front side of the folded part of the shielding sleeve is provided with a sealing ring, and the outer edge of the folded part extends to form a spot welding part contacting the welding end surface; the spot welding part is welded into one with the welding end surface through spot welding; and the shielding sleeve is grounded through the metal sheet.

6. The housing-less USB receptacle of claim 3, wherein, The first terminal group and the second terminal group respectively comprise contact parts exposed to the upper and lower surfaces of the butt joint tongue part, wrapped parts extending rearward from the contact parts and wrapped in the wrapping part and the tail part, and welding parts extending rearward and downward from the rear end of the wrapped part; the welding parts of the first terminal group and the second terminal group are arranged in two rows in the lateral direction, the welding parts of the first terminal group above are located behind the welding parts of the second terminal group, and the surfaces of the welding parts of the first terminal group and the second terminal group are in the same horizontal plane; the first terminal group and the second terminal group respectively comprise a pair of grounding terminals located at the outermost side, two pairs of high-speed signal terminals located inside the pair of grounding terminals, a pair of power supply terminals located inside the two pairs of high-speed signal terminals, and a plurality of conventional signal terminals located between the pair of power supply terminals.

7. The housing-less USB receptacle of claim 6, wherein, The USB socket further comprises a metal middle plate between the first terminal group and the second terminal group; the metal middle plate comprises a plate body extending along the front-rear direction and located between the high-speed signal terminals of the first terminal group and the high-speed signal terminals of the second terminal group, a buckle part extending laterally outward from the front end of the plate body and exposed outside the insulating body beyond the pair of grounding terminals, a clamping groove formed on the buckle part, and a reinforcing arm extending laterally outward from the rear end of the plate body and embedded in the tail part.

8. The housing-less USB receptacle of claim 6, wherein, The tail part extends to form an ear part laterally outward, the ear part is formed with a first fixing hole, the reinforcing arm is provided with a fixing end at the ear part, the fixing end is provided with a second fixing hole corresponding to the first fixing hole, and the first fixing hole and the second fixing hole jointly constitute a fixing hole for fixing the USB socket through a bolt.

9. The housing-less USB receptacle of claim 8, wherein, The reinforcing arm is located between the wrapped part of the first terminal group and the welding part of the second terminal group, and the reinforcing arm has a welding end face exposed on the front end face of the tail part. The shielding sleeve has a sealing ring mounted or formed on the front side of the folded part. The outer edge of the folded part extends to form a spot welding part which contacts the welding end face. The spot welding part and the welding end face are welded together by spot welding. The shielding sleeve is grounded through the metal middle plate. The reinforcing arm has a welding leg formed by downwardly bending the rear end of the reinforcing arm. The welding leg is welded to the printed circuit board for grounding and reinforcement.

10. The housing-less USB receptacle of claim 9, wherein, The rear end of the plate body has a narrowed part. The reinforcing arm is connected to the rear end of the narrowed part. The width of the narrowed part is smaller than the width of the plate body. The narrowed part is located in the isolation section and exposed to the outside. The waterproof adhesive is also bonded to the narrowed part. The front side of the tail part has a bearing face. The rear end face of the folded part of the shielding sleeve bears against the bearing face for limiting.

11. An electronic device, comprising: The device includes a device frame, electronic components mounted in the device frame, and a shell-free USB socket according to any one of claims 1-10. The device frame has a USB hole formed therethrough. The USB socket is mounted in the electronic device. The mating tongue part and the wrapped part of the USB socket are accommodated in the USB hole. The USB socket has a sealing ring provided on the outer periphery of the shielding sleeve and located in front of the folded part. The sealing ring is pressed between the rear end face of the outer periphery of the USB hole and the folded part to achieve waterproofing. The USB socket is fixed to a printed circuit board or other object in the electronic device.

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