TWM509995U - Electrical connector - Google Patents

Description

Electrical connector

The present invention relates to an electrical connector, and more particularly to an electrical connector having a waterproof function.

The Chinese patent CN201220625812.1 discloses an electrical connector comprising an insulating body, a conductive terminal fixed on the insulating body, and a shielding shell covering the insulating body, the shielding shell being annularly arranged and provided with a top wall and a top wall An opposite bottom wall and two side walls connecting the top wall and the bottom wall, the electrical connector further comprising an auxiliary housing covering the outside of the shielding shell, the auxiliary housing being provided with the top of the shielding housing a top plate of the wall, extending downwardly from both sides of the top plate and attaching two side plates shielding the two side walls of the housing; and mounting legs respectively extending downward from the lower ends of the two side plates respectively: the electrical connector further comprises a cover A waterproof housing that shields the periphery of the housing, the auxiliary housing being embedded in the waterproof housing, the mounting foot projecting downwardly from the waterproof housing. The insulative housing is provided with a base portion, and the shielding housing is provided with a closed portion surrounding the base portion in an annular shape, and a concave groove is formed around the base portion and the closed portion contacting portion, and the electrical connection is And a contact portion disposed in the recess to seal the contact between the closed portion and the base The sealing unit of the bit. The sealing unit can only seal the gap between the shielding shell and the base of the insulating body, but the external water droplets can also pass through the matching gap between the shielding shell and the auxiliary housing or from the top wall of the shielding housing. The slit flows backward into the interior of the electronic device, and the waterproof sealing effect is still not ideal.

The technical problem to be solved by the novel is mainly to overcome the above The deficiencies of the prior art provide an electrical connector that can effectively prevent external water droplets from penetrating into the interior of the electronic device through the gap inside the electrical connector.

The present invention proposes an electrical connector for the above technical problems, The utility model comprises an outer shielding shell formed with a cavity extending forward and backward, a fixing component fixed on the outer side of the outer shielding shell, a composite module inserted in the cavity body and surrounding the outer shielding shell and the outer periphery of the composite module An insulating housing includes a top plate and at least one grounding fixing leg extending from the top plate, the at least one grounding fixing leg extending outwardly from the insulating housing; and a top plate of the fixing component is fixed to the outer shielding shell The outer shield shell and the fixing component are integrally formed in the insulating shell, and the composite module is inserted into the cavity of the outer shield shell from the rear of the insulating shell; the composite module includes a a composite insulating body and a set of upper rows of terminals disposed on the composite insulating body, a set of lower rows of terminals, and an intermediate shielding sheet between the upper row of terminals and the lower row of terminals, wherein a rear end of the composite insulating body is Forming at least one first groove between the insulating shells; a sealant is disposed behind the composite insulating body, the sealant is along the at least one first groove Pre-infiltration between the composite insulating body and the insulating housing and substantially enclosing the rear portion of the composite insulating body.

In some embodiments, the rear portion of the insulative housing is formed with a a step, the rear portion of the composite insulative housing is formed with a flange attached to the rear of the step, and the at least one first groove is recessed and formed on an outer circumferential surface of the flange.

In some embodiments, the at least one first trench is along the front and the back The direction extends and extends all the way to the stage.

In some embodiments, the composite insulating body is at the flange two The front surface of the side surface is recessed to form a positioning groove; the two sides of the outer shielding shell extend rearwardly to a positioning leg, and the two positioning legs are inserted backward into the two positioning slots.

In some embodiments, the insulative housing is in the composite insulation The rear end of the body encloses a receiving groove, and the sealant is filled in the receiving groove.

In some embodiments, the outer shield shell includes a bottom wall, Two side walls respectively bent upwardly on two sides of the bottom wall and a top wall which is bent and then extended and joined by the top ends of the two side walls, the top wall having a pair of seams, the cavity is The bottom wall, the two side walls and the top wall are enclosed; the top plate of the fixing element is welded and fixed on both sides of the butt joint of the top wall.

In some embodiments, the intermediate shielding sheet comprises a substrate and Extending at least one first soldering leg of the composite insulative housing from the substrate; each of the lower row of terminals has a second soldering leg extending rearwardly from the composite insulative housing, wherein the first soldering leg and the second soldering leg Is distribution On the same welding plane and aligned in the lateral direction.

In some embodiments, the electrical connector further includes The composite insulating body has an inner shielding shell on the inner side of the outer shielding shell, and the inner shielding shell is composed of two shielding sheets respectively located on upper and lower sides of the composite insulating body, and each side of each shielding sheet is vertical A fixing protrusion is extended; a fixing hole is formed on each side of the composite insulating body, and the fixing protrusion on the two shielding sheets is correspondingly inserted into the two fixing holes. .

In some embodiments, the composite insulating body is insulated by an upper insulator The upper row of terminals are embedded in the upper insulator, and the lower row of terminals are embedded in the lower insulator, and the upper insulator and the lower insulator respectively extend forwardly with a first tongue portion and a second tongue portion interposed between the first tongue portion of the upper insulator and the second tongue portion of the lower insulator; the number of the first grooves is plural, The first trenches are respectively formed on the outer periphery of the rear portion of the upper insulator and the lower insulator; at least one second trench is formed between the upper insulator and the lower insulator, and the sealant is further along the at least one second trench The groove penetrates forward between the upper insulator and the lower insulator.

In some embodiments, the composite insulating body is insulated by a main insulator a combination of a body, an upper insulator and a lower insulator, wherein the upper row of terminals are embedded in the upper insulator, and the lower row of terminals are embedded in the lower insulator; the main insulator extends forwardly to form an integral tongue plate. The intermediate shielding piece is embedded in the tongue plate of the main insulator, and the set of upper row terminals and the group of lower row terminals are respectively exposed on upper and lower sides of the tongue plate; the number of the first grooves is a plurality of the first trenches are respectively formed on the outer periphery of the upper insulator, the lower insulator and the rear portion of the main insulator; at least one second trench is further formed between the upper insulator and the lower insulator, the sealant Further penetrating between the upper insulator and the lower insulator along the at least one second trench.

Compared with the prior art, the electrical connector of the present invention is solidified by The integrated component and the outer shield shell are integrally formed into the insulating shell, and then the composite module is inserted into the cavity of the outer shield shell from the back to the front, and is formed between the rear end of the composite insulating body and the insulating shell. a plurality of first grooves, and then the sealant is disposed to the rear end of the composite insulating body, and the sealant can penetrate forward through the first grooves to form a sealing unit that completely closes the rear portion of the composite insulating body, and can be firmly fixed The ground is coupled to the insulative housing, thereby effectively preventing external water droplets from penetrating into the interior of the electronic device through the gap inside the electrical connector; in addition, the intermediate shielding sheet can effectively reduce the upper and lower terminals during high frequency transmission Crosstalk to facilitate the application of the electrical connector to the transmission of high frequency messages.

10‧‧‧Electrical connector

1‧‧‧Outer shield

11‧‧‧ bottom wall

12‧‧‧ side wall

13‧‧‧ top wall

131‧‧‧pair seams

14‧‧‧ positioning feet

19‧‧‧ cavity

2‧‧‧Fixed components

21‧‧‧ top board

22‧‧‧Extension

23‧‧‧ Grounding feet

29‧‧‧ solder joints

3‧‧‧Insulated casing

38‧‧‧step

39‧‧‧ hollow cavity

4‧‧‧Composite module

41‧‧‧Upper terminal module

411‧‧‧Upper insulator

4113‧‧‧First tongue part

412‧‧‧Upper terminal

413‧‧‧First groove

414‧‧‧Second trench

416‧‧‧ positioning slot

417‧‧‧Cargukong

42‧‧‧Bottom terminal module

421‧‧‧lower insulator

4213‧‧‧Second tongue part

422‧‧‧lower terminal

4222‧‧‧ soldering feet

423‧‧‧First trench

424‧‧‧Second trench

426‧‧‧ positioning slot

427‧‧‧Cargukong

429‧‧‧ bumps

43‧‧‧Intermediate shielding film

431‧‧‧Substrate

432‧‧‧ soldering feet

44‧‧‧Composite Insulation Body

441‧‧‧Flange

442‧‧‧ base

443‧‧‧ tongue plate

444‧‧‧Second trench

446‧‧‧ positioning slot

447‧‧‧Cargukong

5‧‧‧ inner shield shell

51‧‧‧Shield

517‧‧‧Fixed tabs

6‧‧‧Sealing adhesive

61‧‧‧ base

63‧‧‧First extension

64‧‧‧Second extension

7‧‧‧storage trough

10a‧‧‧Electrical connector

4a‧‧‧Composite module

41a‧‧‧Upper terminal module

411a‧‧‧Upper insulator

412a‧‧‧Upper terminal

42a‧‧‧Bottom terminal module

421a‧‧‧lower insulator

422a‧‧‧lower terminal

43a‧‧‧Intermediate shielding film

44a‧‧‧Composite Insulation Body

46a‧‧‧Intermediate module

461a‧‧‧Main insulator

4611a‧‧‧ base

4612a‧‧ ‧Tongue

4613a‧‧‧ Containment space

4614a‧‧‧Terminal receiving slot

4615a‧‧‧First trench

467a‧‧‧卡固孔

6a‧‧‧Sealing adhesive

Other features and advantages of the present invention will be apparent from the detailed description of the embodiments of the present invention. FIG. 1 and FIG. 2 are perspective views of a preferred embodiment of the present invention; FIG. 1 is a front view of the electrical connector; FIG. 4 is a cross-sectional view taken along line AA of FIG. 3; FIG. 5 is an exploded perspective view of the electrical connector of FIG. 1. FIG. 6 and FIG. Further decomposition of the electrical connector Figure 8 is a perspective exploded view of a further exploded view of the electrical connector of Figure 7; Figure 9 is a further exploded perspective view of the electrical connector of Figure 8; Figure 10 is an electrical connector of Figure 9 FIG. 11 is a front elevational view of another preferred embodiment of the present invention; FIG. 12 is a cross-sectional view taken along line BB of FIG. 11; and FIG. 13 is an electrical connection shown in FIG. FIG. 14 and FIG. 15 are further exploded perspective views of the electrical connector of FIG. 13; and FIG. 16 is a further exploded perspective view of the electrical connector of FIG.

Although the present invention can be readily embodied in various forms, the specific embodiments shown in the drawings and described in detail in the specification are only The exemplary description of the novel principles is not intended to limit the invention to what is described herein.

Thus, a feature indicated in this specification will be used to illustrate one of the features of one embodiment of the present invention, and is not intended to suggest that each embodiment of the present invention must have the features described. Moreover, it should be noted that this specification describes a number of features. Although certain features may be combined together to illustrate possible system designs, these features are also applicable to other combinations not explicitly illustrated. Thus, unless otherwise stated, the illustrated group Mergers are not intended to be limiting.

In the embodiment shown in the figures, an indication of direction (such as The structures and movements of the various elements used to explain the novel are not absolute but relative. These descriptions are suitable when the elements are in the positions shown in the figures. If the description of the position of these elements changes, the indications of these directions also change accordingly.

The following is a better example of the present invention in conjunction with the drawings of the present specification. The examples are further elaborated.

Referring to FIG. 1 to FIG. 10, a comparison of the electrical connector 10 of the present invention is shown. A good example. The electrical connector 10, specifically to this embodiment, is a USB 3.0 Type-C connector having a sealed waterproof structure. The electrical connector 10 includes an outer shield shell 1 having a cavity 19 extending forward and backward, a fixing component 2 fixed to the outer side of the outer shield shell 1, and an outer periphery of the outer shield shell 1 and the fixing component 2 overmolded. An insulative housing 3, a composite module 4 that is inserted into the cavity 19 from the front to the front, and an inner shield shell 5 that is mounted on the composite module 4 and used to sufficiently seal the composite module 4 A layer of sealant 6 at the end.

Referring to Figures 9 and 10, the outer shield shell 1 is made of sheet metal. The utility model is integrally formed by bending, and comprises a bottom wall 11 , two side walls 12 which are respectively bent upwardly and extended from two sides of the bottom wall 11 , and are formed by bending the top ends of the two side walls 12 and then extending and joining each other. A top wall 13. The top wall 13 has a pair of seams 131. The two side walls 12 also extend rearwardly from a positioning leg 14. The bottom wall 11, the two side walls 12 and the top wall 13 enclose the aforementioned cavity 19.

Referring to Figures 8 and 9, the fixing member 2 is made of sheet metal. The utility model is integrally bent, and comprises a top plate 21 and two grounding fixing legs 23 which are respectively bent downwardly from two sides of the top plate 21. The top plate 21 is fixed to both sides of the butting seam 131 of the top wall 13 of the outer shield shell 1 by laser welding. Four laser solder joints 29 are shown in FIG. This structure can strengthen the overall strength of the outer shield shell 1 so as not to be subjected to force deformation cracking at the butt seam 131, thereby ensuring reliable docking of the electrical connector 10 with another mating connector (not shown).

Referring to FIG. 7 to FIG. 10, the insulating case 3 is adopted. The edge material is integrally molded. The outer shield shell 1 and the fixing element 2 are integrally formed in the insulating shell 3 . The outer shield case 1 and the top plate 21 of the fixing member 2 are completely buried in the insulating case 3. This structure can completely eliminate the possible matching gap between the outer shield shell 1 and the insulating outer casing 3, which is advantageous for waterproofing. A hollow cavity 39 is formed in the interior of the insulative housing 3. The rear portion of the hollow cavity 39 of the insulative housing 3 is formed with an annular first-stage table 38 such that the rear end opening of the hollow cavity 39 has a larger size than the front opening.

Referring to FIG. 4, FIG. 6 and FIG. 9, from the overall structure, the The composite module 4 includes a composite insulative housing 44 and a set of upper rows of terminals 412 disposed on the composite insulative housing 44, a set of lower rows of terminals 422, and an intermediate shield between the upper row of terminals 412 and the lower row of terminals 422. 43. The composite insulative housing 44 integrally includes a base portion 442, a tongue plate 443 extending forwardly from the base portion 442, and a flange 441 extending rearwardly of the base portion 442 and annularly outwardly. A plurality of first trenches 413, 423 are formed between the rear end of the composite insulating body 44 and the insulating housing 3; the composite insulation The rear surface of the body 44 is provided with a layer of sealant 6 which penetrates forward between the composite insulating body 44 and the insulating housing 3 along the first grooves 413, 423 and fully closes the composite insulating body 44. The back.

Referring to FIG. 9 and FIG. 10, specifically to the complex of the preferred embodiment The module 4 is a combination of an upper row of terminal modules 41, a lower row of terminal modules 42 and an intermediate shielding sheet 43. The upper row of terminal modules 41 includes an upper insulator 411 and an upper row of terminals 412 that are insert molded into the upper insulator 411. The upper insulator 411 extends forwardly from a first tongue portion 4113. The top surface and the two sides of the rear portion of the upper insulator 411 are formed with a plurality of first grooves 413 extending in the front-rear direction. It is worth mentioning that in some embodiments, a first groove (not shown) may also be formed on the inner surface of the insulative housing 3 that abuts the flange 441, and in some embodiments, these The first groove (not shown) may also be undulatingly extending in the front-rear direction. A plurality of second trenches 414 are formed on the bottom surface of the upper insulator 411. The upper insulator 411 is formed with a forwardly opening positioning groove 416 on both sides of the front surface of the flange 441. Each of the two sides of the upper portion of the upper insulator 411 is formed with a fastening hole 417 which is vertically penetrated and closed at all sides.

Similarly, the lower row of terminal modules 42 includes the upper insulator The lower insulator 421 and the insert 411 are formed in the lower row of terminals 422 in the lower insulator 421. The lower insulator 421 extends forwardly from a second tongue portion 4213. The bottom surface and the two sides of the rear portion of the lower insulator 421 are formed with a plurality of first grooves 423. A plurality of second trenches 424 are formed on the top surface of the lower insulator 421. The lower insulator 421 is formed with a forwardly opening positioning groove 426 on both sides of the front surface of the flange 441. The middle sides of the lower insulator 421 Each of them is formed with a fixing hole 427 which is vertically penetrated and closed at all.

Referring to FIGS. 6 and 8, the upper insulator 411 and the lower insulator The 421 is combined with each other to form the composite insulative body 44. The second trench 414 of the upper insulator 411 and the second trench 424 of the lower insulator 421 form a complete second trench 444. The fastening hole 427 of the lower insulator 421 and the fastening hole 417 of the upper insulator 411 form a fastening hole 447 which is vertically penetrated and closed at all. The positioning groove 426 of the lower insulator 421 and the positioning groove 416 of the upper insulator 411 cooperate to form a complete positioning groove 446.

Referring to FIG. 9, the lower insulator 421 is opposite to the upper insulator 411. A plurality of protrusions 429 are formed on the mating surfaces, and the protrusions 429 are melted when the upper insulator 411 and the lower insulator 421 are ultrasonically welded to fix the upper insulator 411 and the lower insulator 421.

Referring to Figures 4, 6, and 10, each of the lower rows of terminals 422 has a soldering foot 4222 that extends rearwardly out of the composite insulative body 44. The soldering foot 4222 can be soldered to a circuit board (not shown) by surface soldering.

Referring to FIGS. 9 and 10, the intermediate shielding piece 43 is interposed between the first tongue portion 4113 of the upper insulator 411 and the second tongue portion 4213 of the lower insulator 421. The intermediate shielding sheet 43 includes a substrate 431 and soldering legs 432 extending backward from both sides of the substrate 431. The intermediate shielding piece 43 is located between the upper row of terminals 412 and the lower row of terminals 422, and can effectively reduce crosstalk between the upper row of terminals 412 and the lower row of terminals 422 during high frequency transmission. Soldering legs 432 of these soldering legs 432 and these lower rows of terminals 422 They are distributed on the same weld plane and are laterally aligned. This configuration facilitates the electrical connector 10 to have a relatively compact structure.

Referring to FIG. 6, FIG. 8 and FIG. 9, the composite insulating body 44 A flange 441 which is fitted to the rear of the step 38 on the insulative housing 3 is formed in the rear portion. These first grooves 413 and 423 are recessed and formed on the outer circumferential surface of the flange 441. In the present embodiment, the first grooves 413, 423 extend in the front-rear direction and extend forward to the stage 38 so that the sealant 6 can be infiltrated into the stage 38 for a better sealing effect. The rear end of the insulative housing 3 extends rearward from the rear end of the composite insulative housing 44 such that the rear portion of the insulative housing 3 and the rear end of the composite insulative housing 44 enclose a receiving slot 7. The composite module 4 is inserted into the cavity 19 from the front to the front until the front end surface of the flange 441 abuts against the vertical surface of the step 38 to be installed in position, and the structure can improve the waterproof seal. Effect.

Referring to Figures 6 and 8, the inner shield shell 5 is preferably separated by a bit The two shielding sheets 51 on the upper and lower sides of the composite insulating body 44 are combined. Each of the two sides of each of the shielding sheets 51 is vertically bent to extend a fixing protrusion 517. The two fixing protrusions 517 are correspondingly inserted into the two fastening holes 447 of the composite insulating body 44. This snap-fit structure facilitates assembly and allows the two shield sheets 51 to be securely mounted to the composite insulative body 44. In addition, the inner shield shell 5 and the outer shield shell 1 can be fixedly coupled together by laser welding, thereby improving the grounding effect of the inner shield shell 5.

Referring to Figures 4 to 9, the sealant 6 is disposed in the composite The rear end of the body 44. The sealant 6 is specifically applied to the receiving groove 7 and Solidified into a unitary sealing unit. The sealant 6 includes a base portion 61 that is substantially enclosed in the rear end of the composite insulative housing 44, and a first extension portion 63 extending from the substrate 61 into the first trenches 413, 423 and The base 61 extends forward into the second extension 64 of the second groove 444. It is worth mentioning that, depending on the structure of the composite module 4 itself and the cooperation between the composite module 4 and the insulative housing 3, the sealant 6 may further include other extensions extending forward from the base 61. For example, a portion extending into a gap between the outer periphery of the composite insulating body 44 and the inner edge of the insulating case 3, for example, a portion extending into a gap between the bottom surface of the upper insulator 411 and the top surface of the lower insulator 421.

The assembly process of the novel electrical connector 10 generally includes: The outer shield shell 1 is welded to the fixing member 2; the insulating shell 3 is overmolded by injecting molten plastic into the outer periphery of the outer shield shell 1 and the fixing member 2; and the intermediate shield sheet 43 is clamped to the upper row terminal module 41 and the lower row of terminal modules 42; the upper row of terminal modules 41 and the lower row of terminal modules 42 are fixed together by ultrasonic welding to obtain the composite module 4; and then the two shielding sheets 51 are installed The upper and lower sides of the composite module 4 are disposed to form an inner shield shell 5; then the composite module 4 provided with the inner shield shell 5 is inserted into the cavity 19 from the rear to the outer shield The two positioning legs 14 of the shell 1 are correspondingly inserted into the positioning groove 446; finally, a layer of sealant 6 is disposed at the receiving groove 7, thereby integrally sealing the opening at the rear end of the insulating case 3.

Compared with the prior art, the present invention adopts the fixing element 2 The outer shield shell 1 is integrally formed in the insulative housing 3, and the composite module 4 is inserted into the cavity 19 of the outer shield shell 1 from the rear to the front, and in the composite insulation A plurality of first grooves 413, 423 are formed between the rear end of the body 44 and the insulative housing 3, and then a sealant 6 is disposed at the rear end of the composite insulative housing 44 through which the sealant 6 can pass. The 423 penetrates forward between the composite insulating body 44 and the insulating casing 3, so that the sealant 6 can be firmly bonded to the insulating casing 3, and the gap of the rear portion of the composite module 4 is sufficiently sealed, thereby effectively preventing the external water droplets. The inside of the electrical connector 10 penetrates back into the interior of the electronic device.

Referring to Figures 11 to 16, another type of the present type of electrical connector The preferred embodiment is an electrical connector 10a. The electrical connector 10a of the present embodiment is substantially identical to the electrical connector 10 of the previous embodiment. The difference between the electrical connector 10a of the present embodiment and the electrical connector 10 of the foregoing embodiment is mainly embodied in that the composite module 4a is specifically composed of an upper row of terminal modules 41a, a lower row of terminal modules 42a and an intermediate mode. Group 46a is combined. The upper row of terminal modules 41a and the lower row of terminal modules 42a are respectively attached to the upper and lower sides of the intermediate module 46a. The upper row of terminal modules 41a includes an upper insulator 411a and a set of upper rows of terminals 412a embedded in the upper insulator 411a. Similarly, the lower row of terminal modules 42a includes a lower insulator 421a and a set of lower rows of terminals 422a embedded in the lower insulator 421a. The intermediate module 46a includes a main insulator 461a and an intermediate shielding piece 43a embedded in the main insulator 461a. The composite insulative housing 44a is formed by combining the main insulator 461a, the upper insulator 411a, and the lower insulator 421a.

Specifically, the main insulator 461a includes a base portion 4611a. And a tongue plate 4612a extending forward from the base portion 4611a. A positioning groove 467a is formed on each of both sides of the front surface of the base portion 4611a. The base A first groove 4615a is also formed on the outer periphery of the 4611a. A receiving space 4613a is disposed behind the base portion 4611a. The upper insulator 411a and the lower insulator 421a are housed in the accommodating space 4613a. The intermediate shielding piece 43a is embedded in the main insulator 461a and extends to the tongue plate 4612a. The upper and lower sides of the tongue plate 4612a are provided with terminal receiving grooves 4614a to accommodate the upper row of terminals 412a and the lower row of terminals 422a. The tongue plate 4612a has a unitary structure and is embedded with an intermediate shielding piece 43a in the middle thereof, and its strength is preferably not easily broken. The rear end of the composite module 4a is also coated with a sealant 6a which penetrates into the first groove 4615a forward and sufficiently seals the gap at the rear of the composite module 4a.

The above is only a preferred embodiment of the present invention, and is not intended to limit the embodiments of the present invention. Those skilled in the art can make corresponding modifications or modifications in a very convenient manner according to the main idea and spirit of the present invention. The scope of protection shall be subject to the scope of protection required by the scope of application for patents.

10‧‧‧Electrical connector

1‧‧‧Outer shield

2‧‧‧Fixed components

3‧‧‧Insulated casing

4‧‧‧Composite module

412‧‧‧Upper terminal

441‧‧‧Flange

442‧‧‧ base

443‧‧‧ tongue plate

5‧‧‧ inner shield shell

6‧‧‧Sealing adhesive

61‧‧‧ base

63‧‧‧First extension

64‧‧‧Second extension

7‧‧‧storage trough

Claims (10)

An electrical connector includes an outer shield shell formed with a cavity extending forward and backward, a fixing component fixed to the outside of the outer shield shell, a composite module interposed in the cavity body, and a surrounding outer casing and An insulative housing on the outer periphery of the composite module; the fixing component includes a top plate and at least one grounding fixing leg extending from the top plate, the at least one grounding fixing leg extending outwardly from the insulating housing; the top plate of the fixing component The outer shield shell is fixed together, the outer shield shell and the fixing component are integrally formed in the insulating shell, and the composite module is inserted into the cavity of the outer shield shell from the rear of the insulating shell; The composite module includes a composite insulating body and a set of upper rows of terminals disposed on the composite insulating body, a set of lower rows of terminals, and an intermediate shielding sheet between the upper row of terminals and the lower row of terminals, wherein the composite insulating layer At least one first groove is formed between the rear end of the body and the insulating shell; a sealant is disposed behind the composite insulating body, and the sealant is forward along the at least one first groove Between the composite into the insulating body and the insulating housing, and fully closing the rear portion of the composite insulating body. The electrical connector of claim 1, wherein a rear stage of the insulating housing is formed with a step, and a rear portion of the composite insulating body is formed with a flange attached to the rear of the stage, the at least one first groove is A recess is formed on the outer peripheral surface of the flange. The electrical connector of claim 2, wherein the at least one first groove extends in a front-rear direction and extends all the way to the stage. The electrical connector of claim 2, wherein the composite insulative body is The front surfaces of the two sides of the flange are recessed rearwardly to form a positioning groove; the two sides of the outer shielding shell extend rearwardly to a positioning leg, and the two positioning legs are inserted backward into the two positioning slots. The electrical connector of claim 1, wherein the insulating housing encloses a receiving groove at a rear end of the composite insulating body, and the sealing glue is filled in the receiving groove. The electrical connector of claim 1, wherein the outer shield shell comprises a bottom wall, two side walls extending upwardly from opposite sides of the bottom wall, and the ends of the two side walls are bent and then facing each other. a top wall extending from the joint, the top wall having a pair of seams, the cavity being surrounded by the bottom wall, the two side walls and the top wall; the top plate of the fixing component is welded and fixed on the top The sides of the wall are butt joints. The electrical connector of claim 1, wherein the intermediate shielding sheet comprises a substrate and at least one first soldering leg extending rearward from the substrate to the composite insulating body; each lower row of terminals having the composite insulating strip extending rearward a second soldering leg of the body, wherein the first soldering legs and the second soldering legs are distributed on the same soldering plane and are laterally aligned. The electrical connector of claim 1, wherein the electrical connector further comprises an inner shield shell disposed on the outer periphery of the composite insulating body and located inside the outer shield shell, the inner shield shell being respectively located on the composite insulating body The two shielding sheets on the upper and lower sides are combined, and a fixing protrusion is vertically extended on each side of the shielding sheet; the two sides of the composite insulating body are respectively formed with a fixing hole which is vertically penetrated and closed at all sides. The fixing tabs on the two shielding sheets are correspondingly engaged in the two fastening holes. The electrical connector according to any one of claims 1 to 8, wherein the composite insulating body is composed of an upper insulator and a lower insulator, wherein the upper row of terminals is buried in the upper insulator, and the lower row of terminals is buried. In the lower insulator, the upper insulator and the lower insulator respectively extend forwardly to have a first tongue portion and a second tongue portion, the intermediate shielding sheet being sandwiched between the first tongue portion of the upper insulator and the lower insulator Between the second tongue portions of the lower insulator; the number of the first grooves is plural, and the first grooves are respectively formed at outer edges of the upper insulator and the rear portion of the lower insulator; the upper insulator and the lower portion At least one second trench is formed between the insulators, and the sealant further penetrates between the upper insulator and the lower insulator along the at least one second trench. The electrical connector of any one of claims 1 to 8, wherein the composite insulating body is composed of a main insulator, an upper insulator and a lower insulator, and the set of upper terminals is embedded in the upper insulator, the group The lower row of terminals is embedded in the lower insulator; the main insulator extends forwardly to form an integral tongue plate, and the intermediate shielding piece is embedded in the tongue plate of the main insulator, and the set of upper row terminals and the group of lower row terminals respectively Exposing the upper and lower sides of the tongue plate; the number of the first grooves is plural, and the first grooves are respectively formed on the outer periphery of the upper insulator, the lower insulator and the rear portion of the main insulator; the upper insulator At least one second groove is further formed between the lower insulator and the sealant further penetrates between the upper insulator and the lower insulator along the at least one second groove.