CN218975951U

CN218975951U - Type-C electric connector

Info

Publication number: CN218975951U
Application number: CN202320200061.7U
Authority: CN
Inventors: 李鹏; 易洋
Original assignee: Dongguan Shengteng Precision Electronic Technology Co ltd
Current assignee: Dongguan Shengteng Precision Electronic Technology Co ltd
Priority date: 2023-02-10
Filing date: 2023-02-10
Publication date: 2023-05-05
Anticipated expiration: 2033-02-10

Abstract

The utility model discloses a Type-C electric connector, which comprises an inner shell, an outer shell, an insulator and a terminal assembly, wherein the inner shell penetrates through the inner shell, the outer shell is covered on the inner shell, the insulator is arranged in the cavity and is positioned at the corresponding position of the inner shell in a forward direction and is positioned at the corresponding position of the outer shell in a backward direction, the terminal assembly is integrally formed with the insulator, the insulator comprises an insulating substrate and a step part integrally formed by extending backwards from the rear end of the insulating substrate, the shielding ring is arranged outside the step part in a surrounding mode and is welded and fixed with the inner wall of the inner shell, the shielding ring is integrally stretched and formed into a step structure contoured with the step part, and the step surface of the step part is propped against and is positioned on the step surface of the inner wall of the shielding ring in a forward direction. Compared with the prior art, the utility model has higher anti-interference performance, stronger assembly strength, simpler internal structure, simple operation and strong practicability.

Description

Type-C electric connector

Technical Field

The utility model relates to the technical field of connectors, in particular to a Type-C electric connector.

Background

The Type-C connector is a USB interface supporting forward and reverse plug, which improves the strong data transmission capability and the power transmission capability, and is a universal interface standard widely accepted and adopted by the international society, and the traditional Micro USB interface is being comprehensively replaced. The structure of the existing Type-C electrical connector generally comprises a metal outer shell, an insulating body and upper and lower conductive terminals, wherein the insulating body and the upper and lower conductive terminals are arranged in the metal outer shell and are integrally formed, the metal outer shell is generally formed by assembling an inner shell and an outer shell, and the inner insulating body and the conductive terminals are integrally formed by buckling, spot welding or bonding during assembling, a gap is certainly reserved at a connecting position, and external interference signals can penetrate into the electrical connector from the gap, so that the communication quality and the efficiency transmission performance of the electrical connector are affected.

At present, an EMI spring is usually clamped on the surface of the insulating body, and the EMI spring is usually fastened on the outer surface of the insulating body by an upper split structure and a lower split structure, so that the overall anti-interference performance of the electric connector is improved. The existing mode of clamping and buckling is adopted, the assembly strength between the EMI elastic sheet and the insulating body is low, the problem that the EMI elastic sheet is loose easily occurs after repeated plugging is solved, and therefore the anti-interference performance of the electric connector is reduced. In addition, because the EMI shrapnel is connected with the insulating body and other adjacent EMI shrapnels in a clamping and buckling mode, a connecting structure is additionally arranged on the EMI shrapnel and the insulating body, the structure is complex, and the production is inconvenient.

Disclosure of Invention

Therefore, the present utility model is directed to a Type-C electrical connector, which solves the problems of low anti-interference performance, complex structure and low production efficiency caused by low assembly strength and structural gaps of the electrical connector in the prior art.

In order to achieve the above-mentioned objective, the present utility model provides a Type-C electrical connector, which includes an inner housing having a cavity formed therein and extending from front to back, an outer housing covering the inner housing, an insulator disposed in the cavity and disposed at a position corresponding to the inner housing and disposed at a position corresponding to the outer housing, and a terminal assembly integrally formed with the insulator, wherein the insulator includes an insulating substrate and a step portion integrally formed by extending from a rear end of the insulating substrate to the rear, the Type-C electrical connector further includes a shielding ring disposed around the step portion and welded to an inner wall of the inner housing, and the shielding ring is integrally formed into a step structure contoured with the step portion by stretching, and a step surface of the step portion abuts against and is disposed on a step surface of an inner wall of the shielding ring.

Further, the shielding ring comprises an annular front part with a smaller inner diameter, an annular rear part with a larger inner diameter and a transitional connection part integrally connected with the annular front part and the annular rear part, the annular front part and the annular rear part are respectively sleeved at the front end and the rear end of the step part in a ring mode, the outer wall of the annular rear part is in contact with the inner wall of the rear end of the inner shell and is welded and fixed, and the insulator and the terminal assembly sequentially penetrate through the inner shell and the shielding ring from back to front and are inserted into the cavity, and the step surface of the step part is opposite to the inner wall of the transitional connection part and is propped against the transitional connection part.

Further, the insulator further comprises an insulating base part arranged at the rear side of the step part at intervals, the insulating base part is connected with the step part through the terminal assembly, a spacing part is formed between the insulating base part and the step part, waterproof glue is formed in the spacing part in an injection molding mode, and the waterproof glue completely covers the terminal assembly exposed out of the spacing part and seals an assembly gap between the insulator and the inner wall of the inner shell in an adhesive mode.

Further, the inner housing is sleeved outside the insulating substrate and the step part, the insulating base is formed at the rear side of the inner housing and is exposed out of the inner housing, the rear end of the outer housing is provided with a backward stop part which exceeds the rear end of the inner housing and is covered on the insulating base, and the backward stop part is matched with the insulating base in a clamping way to stop the insulator and the terminal assembly.

Further, the backward stop part comprises at least one elastic stop piece formed by inward deflection, and a first stop groove matched with the elastic stop piece for realizing backward stop of the insulator and the terminal assembly is concavely formed at the position of the insulating base part corresponding to the elastic stop piece; and/or

The backward stop part at least comprises a stop lug formed by concave, and a second stop groove matched with the stop lug for realizing backward stop of the insulator and the terminal assembly is formed in the position of the insulating base part corresponding to the stop lug in a concave manner.

Further, the outer shell comprises a main body part covered on the inner shell, an arc-shaped connecting part integrally bent and extended downwards from two lateral sides of the main body part, a welding part integrally extended downwards from one end of the arc-shaped connecting part far away from the main body part, and a back blocking part integrally bent and extended downwards from the rear end of the main body part; one end of the welding part far away from the arc-shaped connecting part and one end of the back baffle part far away from the main body part are integrally extended downwards to form at least one welding pin;

the rear ends of the main body part, the arc-shaped connecting part and the welding part are provided with parts exceeding the rear end of the inner shell, and the parts of the main body part, the arc-shaped connecting part and the welding part exceeding the rear end of the inner shell backwards are enclosed with the rear baffle part to form a containing cavity for containing the insulating base.

Further, the fixing blocks buckled with the corresponding positions of the welding parts are integrally bent forward at the positions of the two lateral sides of the backstop part corresponding to the welding parts, an inward inclined elastic fixing piece is formed on the fixing blocks, and a fixing groove matched with the elastic fixing piece for fixing the backstop part is formed at the position of the welding part corresponding to the elastic fixing piece.

Further, the front end of the inner shell extends outwards integrally to form a baffle ring, the front end of the inner shell is provided with a front end part which extends forwards beyond the outer shell, the front end of the inner shell is correspondingly provided with a waterproof ring which is in a part ring which extends beyond the outer shell, the front end face of the waterproof ring is propped against the rear end face of the baffle ring, and the rear end face of the waterproof ring is propped against the front end face of the outer shell.

Further, the terminal assembly comprises an upper terminal, a lower terminal and an intermediate board, wherein the upper terminal and the lower terminal are integrally formed with the insulator, the intermediate board is clamped between the upper terminal and the lower terminal, the upper terminal and the lower terminal comprise a plurality of conductive terminals, each conductive terminal comprises a buried part buried in the insulator, a butt joint part extending forwards from the buried part and exposed on the upper surface and the lower surface of the insulating substrate, and a soldering leg extending backwards from the buried part and outside the insulator.

Further, the upper and lower surfaces of the middle insertion plate are respectively provided with at least one upper convex part in contact with the upper terminal and at least one lower convex part in contact with the lower terminal in an upward and downward protruding way.

According to the utility model, the shielding ring which is profiled with the step part of the insulator is sleeved outside the insulator, the shielding ring is integrally stretched or stamped, no interface or gap exists on the shielding ring, and thus, the entry of external interference signals can be well avoided, so that the anti-interference performance of the electric connector is improved, meanwhile, the front end of the shielding ring is provided with the annular front part which is sleeved outside the corresponding position of the step part, the shielding range of the shielding ring is enlarged, and the anti-interference performance of the electric connector can be further improved. In addition, the shielding ring is arranged to be in a profiling structure with the step part, namely, the shielding ring is arranged to be integrated and comprises an annular front part with smaller inner diameter at the front end, an annular front part with larger inner diameter at the rear end and a transitional connecting part for transitional connection of the annular front part and the annular rear part, the outer wall of the annular rear part and the inner wall of the inner shell are welded and fixed through spot welding by the whole shielding ring, and when the insulator carrying terminal assembly is assembled into the cavity of the inner shell from back to front, the step surface of the step part correspondingly abuts against the inner wall of the transitional connecting part, so that forward stop is realized on the insulator and the terminal assembly.

Drawings

Fig. 1 is a perspective view of a Type-C electrical connector according to the present utility model.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a schematic structural view of the waterproof ring.

Fig. 4 is a schematic structural view of the outer case.

Fig. 5 is a schematic view of the structure of the insulator and the terminal assembly.

Fig. 6 is a schematic structural view of the terminal assembly.

Fig. 7 is a schematic structural view of a shield ring.

The specification reference numerals are as follows:

the inner case 1, the cavity 1a, the annular case 11, the retainer ring 12, the waterproof ring 2, the annular body 21, the water retaining ring 22, the waterproof groove 23, the outer case 3, the housing cavity 3a, the main body 31, the arc-shaped connecting portion 32, the welded portion 33, the fixing groove 331, the rear retaining portion 34, the connecting rib 341, the rear stopper 342, the welding pin 35, the fixing block 36, the elastic fixing piece 361, the elastic stopper 371, the stopper projection 372, the insulator 4, the insulating substrate 41, the stepped portion 42, the stepped surface 42a, the insulating base 43, the first stopper groove 43a, the second stopper groove 43b, the spacer portion 44, the terminal assembly 5, the upper terminal 51, the lower terminal 52, the center insert plate 53, the upper convex portion 531, the lower convex portion 532, the conductive terminal 54, the buried holding portion 541, the abutting portion 542, the solder tail 543, the shield ring 6, the annular front portion 61, the annular rear portion 62, the transition connecting portion 63, and the waterproof adhesive 7.

Detailed Description

The following is a further detailed description of the embodiments:

examples

As shown in fig. 1 and 2, the Type-C electrical connector of the present utility model comprises an inner housing 1, a waterproof ring 2 looped around the front end of the inner housing 1, an outer housing 3 covered on the inner housing 1, an insulator 4 inserted in the inner housing 1, a terminal assembly 5 integrally formed with the insulator 4 and disposed in the inner housing 1, a shielding ring 6 looped around the insulator 4, and a waterproof adhesive 7 for sealing the gaps between the inner housing 1 and the insulator 4 and the terminal assembly 5; in this embodiment, the inner housing 1 and the shielding ring 6 are integrally stretched or stamped, and the shielding ring 6 is fixedly disposed between the inner housing 1 and the insulator 4, so that external interference signals can be effectively prevented from entering the electrical connector, and thus the anti-interference performance of the electrical connector is improved.

The inner housing 1 includes an annular housing 11 and a cavity 1a formed by surrounding the annular housing 11, the cavity 1a penetrates through the annular housing 11 from front to back, the cross section of the cavity 1a is in an approximately elliptical structure when seen from front to back, and the cavity 1a is symmetrically arranged in the left-right and up-down directions with respect to the insulator 4 and the terminal assembly 5, namely, the Type-C electrical connector can be inserted in the opposite directions of the corresponding butt connector.

The front end of the inner housing 1 (i.e., the annular housing 11) has a portion that extends forward beyond the front end of the outer housing 3, and the waterproof ring 2 is looped over the extended portion of the annular housing 11. Preferably, the front end of the annular housing 11 (i.e., the inner housing 1) may further integrally extend outwards along a direction perpendicular to the central axis of the annular housing 11 to form a baffle ring 12, the baffle ring 12 surrounds the front end of the annular housing 11 for a circle, after the waterproof ring 2 is assembled in place, the front end surface of the waterproof ring 2 can abut against the rear end surface of the baffle ring 12, so that the waterproof ring 2 is prevented from being separated from the annular housing 11 forward, and meanwhile, the rear end surface of the waterproof ring 2 can abut against the front end surface of the outer housing 3, so that the waterproof ring 2 is further limited to displace along the front-rear direction, and the waterproof effect is further increased.

In this embodiment, the waterproof ring 2 is made of rubber, and the inner diameter of the waterproof ring 2 may be equal to or slightly smaller than the outer diameter of the annular housing 11, so that the inner wall of the waterproof ring 2 can be tightly compacted on the outer wall of the annular housing 11 to further increase the waterproof effect; of course, in other embodiments, the inner diameter of the waterproof ring 2 may be slightly larger than the outer wall of the annular housing 11, and when assembling, the waterproof ring 2 and the outer wall of the annular housing 11 may be uniformly coated with waterproof glue to realize sealing and waterproofing.

As shown in fig. 3, the waterproof ring 2 includes an annular body 21 sleeved outside the annular housing 11, and at least one water blocking ring 22 protruding outwards from the outer peripheral surface of the annular body 21. In this embodiment, in order to increase the waterproof effect of the waterproof ring 2, two water retaining rings 22 are disposed on the outer circumferential surface of the annular body 21, and an annular waterproof groove 23 is formed between the two water retaining rings 22, when the water retaining ring 22 at the front end does not have enough water retaining effect, the waterproof groove 23 between the two water retaining rings 22 can play a certain water storage effect to prevent water mist from spreading backwards, and meanwhile, when the waterproof groove 23 does not have enough water retaining effect, the water retaining ring 22 at the rear end can also block the water mist again, thereby realizing multiple water retaining and further effectively preventing the water mist from entering the electric connector. It will be appreciated that in other embodiments, a single water retaining ring 22 may be provided to reduce the manufacturing difficulty and cost of the waterproof ring 2, or more than two water retaining rings 22 may be provided to further increase the waterproof performance of the waterproof ring 2.

In this embodiment, the cross section of the water retaining ring 22 is in an approximately triangular or trapezoidal structure, and the front end inclined plane formed by the triangular or trapezoidal structure is used as the water facing surface to block the water mist. It will be appreciated that in other embodiments, the cross-section of the water deflector ring 22 may be approximately semicircular, rectangular, parallelogram or shaped.

As shown in fig. 4, the outer case 3 is covered on the rear side of the ring case 11 corresponding to the waterproof ring 2 and is fixed to the ring case 11 by spot welding. The outer casing 3 includes a main body 31 covering the inner casing 1, an arc-shaped connecting portion 32 integrally extending downward from two lateral sides of the main body 31, a welding portion 33 integrally extending downward from one end of the arc-shaped connecting portion 32 away from the main body 31, and a rear blocking portion 34 integrally extending downward from the rear end of the main body 31. The main body 31, the arc-shaped connecting portion 32 and the welding portion 33 are connected to form a receiving groove (not labeled) with a downward opening, and inner walls of the main body 31 and the arc-shaped connecting portion 32 are attached to the annular housing 11 and welded to fix the annular housing 11 in the receiving groove and at a position at the front end of the receiving groove. The front end surfaces of the main body 31, the arc-shaped connecting portion 32 and at least part of the welding portion 33 are abutted against the rear end surface of the waterproof ring 2, the rear end surface extends rearward beyond the rear end surface of the annular housing 11, so that the rear end of the outer housing 3 has a portion extending rearward beyond the rear end of the inner housing 1 (i.e., the annular housing 11), the rear ends of the main body 31, the arc-shaped connecting portion 32 and the welding portion 33 respectively have a portion extending rearward beyond the rear end of the inner housing 1, the rear blocking portion 34 closes the rear end of the accommodating groove to form an accommodating cavity 3a capable of accommodating part of the insulator 4 and the terminal assembly 5 in the accommodating groove, namely, the accommodating cavity 3a is formed by enclosing the portion extending rearward beyond the rear end of the inner housing 1 of the main body 31, the arc-shaped connecting portion 32 and the welding portion 33 with the rear blocking portion 34.

At least one welding pin 35 is formed at one end of the welding portion 33 away from the arc-shaped connecting portion 32 and one end of the back blocking portion 34 away from the main body portion 31, and the welding pins 35 are formed by integrally extending downward from the corresponding welding portion 33 or the back blocking portion 34.

The fixing blocks 36 are integrally bent forward at positions of the two lateral sides of the back blocking portion 34 corresponding to the welding portion 33, and are buckled with the positions of the welding portion 33, an elastic fixing plate 361 is formed on the fixing blocks 36, and a fixing groove 331 is formed on the welding portion 33 corresponding to the position of the elastic fixing plate 361, and is matched with the elastic fixing plate 361 to fix the back blocking portion 34. The elastic fixing piece 361 is formed by tearing the middle part of the fixing piece 36 inwards, so that after the back baffle part 34 is bent downwards from the rear end of the main body part 31, the fixing piece 36 synchronously moves and approaches to the rear end of the welding part 33 until the elastic fixing piece 361 is buckled into the fixing groove 331, so as to fix the back baffle part 34 and seal the accommodating groove. Specifically, the rear blocking portion 34 includes at least one connecting rib 341 integrally bent downward from the rear end of the main body 31, and a rear stop 342 integrally formed at the lower end of the connecting rib 341, and the fixing block 36 is integrally formed at two lateral sides of the rear stop 342 and is bent forward to be buckled with the outer wall of the rear end of the welding portion 33.

The rear end of the outer housing 3 (i.e., the main body 31) is formed with a rearward stop portion that is engaged with a corresponding position of the insulator 4 in a snap fit manner, so as to prevent the insulator 4 from carrying the terminal assembly 5 rearward. In this embodiment, the rearward stop portion includes at least one elastic stop piece 371 formed by inward offset and at least one stop bump 372 formed by inward recess, the elastic stop piece 371 may be formed by inward tearing of the main body portion 31, the stop bump 372 may be formed by punching of the main body portion 31, and the end of the elastic stop piece 371 and the distal end of the stop bump 372 both exceed the plane corresponding to the inner wall of the main body portion 31 inward, so as to be capable of being engaged with a portion of the insulator 4 located in the accommodating cavity 3a in a clamping manner, thereby realizing rearward stop of the insulator 4 and the terminal assembly 5. It can be appreciated that in other embodiments, a plurality of elastic stop pieces 371 and stop bumps 372 may be provided according to the requirements of the stop strength, and the backward stop of the insulator 4 and the terminal assembly 5 may be realized by only providing the elastic stop pieces 371 or only providing the stop bumps 372 according to the processing difficulty; meanwhile, the structure of the rearward stopper is not limited to the above-described arrangement, and any structure can be used as long as it can realize the rearward stopper of the insulator 4 and prevent the insulator 4 and the terminal assembly 5 from moving rearward.

The insulator 4 and the terminal assembly 5 integrally formed therewith are inserted into the cavity 1a of the annular housing 11 from the rear to the front, and are retained in the corresponding positions of the inner housing 1 and the outer housing 3 by the shielding ring 6 and the rear retaining portion of the outer housing 3.

As shown in fig. 5, the insulator 4 includes an insulating substrate 41, a stepped portion 42 integrally formed to extend rearward from a rear end of the insulating substrate 41, and an insulating base 43 provided at a rear side of the stepped portion 42 with a gap therebetween. The insulating substrate 41 and the step portion 42 are completely accommodated in the cavity 1a of the inner housing 1, the insulating base 43 is exposed rearward at the rear side of the inner housing 1 and is accommodated in the accommodating cavity 3a of the outer housing 3, and the upper surface of the insulating base 43 is engaged with the rearward stop portion to realize the rearward stop of the whole insulator 4. The step portion 42 has a front end with a smaller size and a rear end with a larger size, the rear end of the front end of the step portion 42 is slightly larger than the thickness of the insulating substrate 41 and is coaxially and integrally arranged with the insulating substrate 41, on a horizontal projection perpendicular to the plugging direction of the insulator 4 and the terminal assembly 5, two lateral sides of the front end of the step portion 42 and two lateral sides of the insulating substrate 41 are located at the same horizontal plane, and two lateral sides of the rear end of the step portion 42 have outer edge portions which extend outwards beyond the front end of the step portion 42 and the two lateral sides of the insulating substrate 41, so that a step surface 42a is formed on the step portion 42, and when the insulator 4 is plugged forwards with the terminal assembly 5 from behind, the insulating substrate 41 can pass through the shielding ring 6 arranged in the inner housing 1 and abut against the step surface 42a on the corresponding position of the shielding ring 6, so that the insulator 4 and the terminal assembly 5 are prevented from moving forwards.

The insulating base 43 is provided with a rear side of the stepped portion 42 at intervals and is connected to the stepped portion 42 through the terminal assembly 5. Specifically, a spacer 44 is formed between the insulating base 43 and the step 42, and the spacer 44 completely disconnects the insulating base 43 from the step 42, so that the waterproof glue 7 is injected into the spacer 44, so that the waterproof glue 7 covers the terminal assembly 5 exposed out of the spacer 44 and seals the assembly gap between the insulator 4 and the inner wall of the inner housing 1.

The positions of the insulating base 43 corresponding to the elastic stop piece 371 and the stop projection 372 are respectively concaved inwards to form a first stop groove 43a matched with the elastic stop piece 371 and a second stop groove 43b matched with the stop projection 372, and when the outer shell 3 is covered on the inner shell 1 from top to bottom or from front to back during assembly, the first stop groove 43a and the second stop groove 43b respectively correspondingly accommodate the elastic stop piece 371 and the stop projection 372 so as to prevent the insulator 4 from moving backwards.

As shown in fig. 6, the terminal assembly 5 includes an upper terminal 51, a lower terminal 52, and an intermediate board 53 interposed between the upper terminal 51 and the lower terminal 52, which are integrally formed with the insulator 4, and the upper terminal 51 and the lower terminal 52 each include a plurality of conductive terminals 54. Each conductive terminal 54 includes a buried portion 541 buried in the insulator 4, a butt portion 542 extending forward from the buried portion 541 and exposed at the upper and lower surfaces of the insulating substrate 41, and a solder tail 543 extending rearward from the buried portion 541 and outside the insulator 4. Specifically, the solder tail 543 of the upper terminal 51 sequentially passes through the step portion 42, the spacer portion 44 (or the waterproof glue 7) and the insulating base 43 from the corresponding buried portion 541 and is exposed to the rear side of the insulating base 43, and the solder tail 543 of the lower terminal 52 sequentially passes through the step portion 42, the spacer portion 44 (or the waterproof glue 7) and the insulating base 43 from the corresponding buried portion 541 and is leaked to the lower side of the insulating base 43. When the waterproof glue 7 is injected, the waterproof glue 7 can tightly wrap each conductive terminal 54 for the conductive terminals 54 in the spacer 44, thereby adhering the fitting gap between the terminal assembly 5, the insulating body and the inner housing 1 to further waterproof the inside of the electrical connector.

The conductive terminals 54 of the upper terminal 51 are in one-to-one correspondence with the conductive terminals 54 of the lower terminal 52, and each include a power terminal and a signal terminal between a pair of ground terminals formed on both lateral sides of the insulator 4.

The upper surface of the middle plug board 53 is provided with at least one upper protruding part 531 contacting with the upper terminal 51 in an upward protruding way, and the lower surface of the middle plug board 53 is provided with at least one lower protruding part 532 contacting with the lower terminal 52 in a downward protruding way, so as to support and communicate with the conductive terminal 54 at the corresponding position. Specifically, the upper protrusion 531 and the lower protrusion 532 are formed at positions on both lateral sides of the interposer 53, the upper protrusion 531 is in contact with the ground terminal of the upper terminal 51 on the corresponding side, and the lower protrusion 532 is in contact with the ground terminal of the lower terminal 52 on the corresponding side. In this embodiment, the upper convex portion 531 and the lower convex portion 532 are formed by punching at corresponding positions of the interposer 53; it will be appreciated that in other embodiments, the upper protrusion 531 and the lower protrusion 532 may be formed by external welding to the interposer 53.

As shown in fig. 7, the shielding ring 6 is disposed around the step 42 and welded to the inner wall of the inner housing 1. Specifically, the shielding ring 6 includes an annular front portion 61 with a smaller inner diameter, an annular rear portion 62 with a larger inner diameter, and a transitional connection portion 63 integrally transitional connecting the annular front portion 61 and the annular rear portion 62, the annular front portion 61 and the annular rear portion 62 are respectively sleeved at the front end and the rear end of the step portion 42, and the outer wall of the annular rear portion 62 is in contact with the inner wall of the rear end of the inner housing 1 and is welded and fixed. During assembly, the insulator 4 and the terminal assembly 5 sequentially penetrate through the inner shell 1 and the shielding ring 6 from back to front and are inserted into the cavity 1a, the inner wall of the transitional connecting part 63 is opposite to the step surface 42a of the step part 42 and is abutted against the step surface 42a, so that the insulator 4 and the terminal assembly 5 are limited to move forwards continuously, and the forward stop of the insulator 4 and the terminal assembly 5 is realized.

In this embodiment, the annular front portion 61 covers the abutting portion 542 partially exposed from the insulating substrate 41, so as to increase the shielding range of the shielding ring 6, and effectively improve the anti-interference performance of the electrical connector; meanwhile, the whole shielding ring 6 is integrally stretched and formed into a step structure which is profiled with the step part 42, and the shielding ring 6 is not provided with interfaces and gaps, so that the entry of external interference signals is effectively prevented, and the anti-interference performance of the electric connector can be further improved.

When the utility model is assembled, firstly, the terminal assembly 5 is placed in an injection mold for injection molding to obtain the insulator 4 which is molded with the terminal assembly 5 into a whole; then, the shielding ring 6 is sleeved on the step part 42 from front to back, and the inner wall of the transitional connecting part 63 of the shielding ring 6 is abutted against the step surface 42a of the step part 42; then, inserting the insulator 4 sleeved with the shielding ring 6 and the terminal assembly 5 into the inner shell 1 from back to front, and spot-welding and fixing the outer wall of the annular rear part 62 of the shielding ring 6 and the inner wall of the corresponding position of the inner shell 1; finally, the outer housing 3 is covered on the inner housing 1 from top to bottom or from back to front, and after the elastic stop piece 371 and/or the stop projection 372 are matched with the first stop groove 43a and/or the second stop groove 43b at the corresponding position, the outer housing 3 and the inner housing 1 are welded into a whole.

According to the Type-C electric connector, the shielding ring 6 is sleeved outside the step part 42, and the front end of the shielding ring 6 can cover the butt joint part 542 of which part is exposed out of the insulating substrate 41 by utilizing the profiling structure of the shielding ring 6 and the step part 42, so that the shielding range of the shielding ring 6 can be enlarged, the anti-interference performance of the electric connector is improved, the insulator 4 and the terminal assembly 5 can be subjected to forward stop as the forward stop structure, the additional forward stop structure is not needed, the structure of the whole electric connector is simplified, and the electric connector has the anti-interference and forward stop functions. In addition, the shielding ring 6 and the inner shell 1 are integrally stretched or stamped, no interfaces or gaps exist on the shielding ring 6 and the inner shell 1, the entry of external interference signals can be well avoided, the anti-interference performance of the electric connector can be further improved, the structure is simple, the shielding ring 6 is not easy to fall off, the assembly is stable, and the electric connector has strong practicability.

Claims

1. The utility model provides a Type-C electric connector, includes that one runs through from beginning to end and is formed the inner shell that has the cavity, cover locate outer casing on the inner shell, set up in the cavity and forward end is located the insulator that corresponds the position of inner shell and backward end is located the corresponding position of outer casing and with the terminal subassembly that the insulator shaping is as an organic whole, the insulator includes insulating substrate and from the rear end of insulating substrate is integrative to extend the step portion that forms backward, its characterized in that still includes one ring locate outside the step portion and with the shielding ring of inner wall welded fastening of inner shell, the shielding ring adopts integrative stretch forming to become with the step structure of step portion profile modeling, the step face of step portion supports to hold and forward end is located on the step face of shielding ring inner wall.

2. The Type-C electrical connector of claim 1, wherein the shield ring comprises a smaller inner diameter annular front portion, a larger inner diameter annular rear portion, and a transitional connecting portion integrally transitional connecting the annular front portion and the annular rear portion, the annular front portion and the annular rear portion are respectively sleeved at the front end and the rear end of the step portion, the outer wall of the annular rear portion is in contact with and welded to the inner wall of the rear end of the inner housing, and the insulator and the terminal assembly sequentially penetrate through the inner housing and the shield ring from back to front and are inserted into the cavity, and the step surface of the step portion is opposite to the inner wall of the transitional connecting portion and is abutted to the transitional connecting portion.

3. The Type-C electrical connector of claim 1, wherein the insulator further comprises an insulating base portion disposed at a rear side of the step portion with a gap therebetween, the insulating base portion and the step portion being connected by the terminal assembly, a spacer portion being formed between the insulating base portion and the step portion, the spacer portion being injection-molded with a waterproof adhesive, the waterproof adhesive completely covering the terminal assembly exposed to the spacer portion and adhesively sealing an assembly gap between the insulator and an inner wall of the inner housing.

4. A Type-C electrical connector as in claim 3 wherein the inner housing is looped over the outer side of the insulating base and the step, the insulating base is formed on the rear side of the inner housing and exposed to the inner housing, the rear end of the outer housing has a rearward stop beyond the rear end of the inner housing and covering the insulating base, and the rearward stop is snap-fit with the insulating base to rearward stop the insulator and terminal assembly.

5. The Type-C electrical connector of claim 4, wherein the rearward stop comprises at least one inwardly offset resilient stop tab, the insulating base having a first stop slot formed inwardly corresponding to the location of the resilient stop tab for mating with the resilient stop tab to effect rearward stop of the insulator and terminal assembly; and/or

6. A Type-C electrical connector as defined in claim 3, wherein the outer housing comprises a main body portion covering the inner housing, an arc-shaped connecting portion integrally bent and extended downward from both lateral sides of the main body portion, a welding portion integrally extended downward from one end of the arc-shaped connecting portion away from the main body portion, and a rear blocking portion integrally bent and extended downward from the rear end of the main body portion; one end of the welding part far away from the arc-shaped connecting part and one end of the back baffle part far away from the main body part are integrally extended downwards to form at least one welding pin;

7. The Type-C electrical connector of claim 6, wherein: the fixing block is formed by bending the positions of the two lateral sides of the backstop part corresponding to the welding part forward integrally, the fixing block is provided with an inward inclined elastic fixing piece, and the position of the welding part corresponding to the elastic fixing piece is provided with a fixing groove matched with the elastic fixing piece to fix the backstop part.

8. The Type-C electrical connector of claim 1, wherein the front end of the inner housing is integrally extended outwards to form a blocking ring, the front end of the inner housing has a front end portion extending forward beyond the outer housing, the front end of the inner housing is correspondingly provided with a waterproof ring in a part extending beyond the outer housing, the front end surface of the waterproof ring abuts against the rear end surface of the blocking ring, and the rear end surface of the waterproof ring abuts against the front end surface of the outer housing.

9. The Type-C electrical connector of claim 1, wherein the terminal assembly comprises an upper terminal integrally formed with the insulator, a lower terminal and a center board sandwiched between the upper and lower terminals, the upper and lower terminals each comprising a plurality of conductive terminals, each conductive terminal comprising a buried portion buried in the insulator, a butt-joint portion extending forwardly from the buried portion and exposed to the upper and lower surfaces of the insulating substrate, and a solder tail extending rearwardly from the buried portion outside the insulator.

10. The Type-C electrical connector of claim 9, wherein the top and bottom surfaces of the interposer are provided with at least one upper protrusion contacting the top terminal and at least one lower protrusion contacting the bottom terminal, respectively, protruding upward and downward.