CN107978888A - Socket connector - Google Patents

Abstract

The invention provides a socket connector, which includes a terminal base, conductive terminals arranged in two rows in the terminal base, and a metal shielding sheet arranged between the two rows of conductive terminals along the height direction, the two rows of conductive terminals Correspondingly and reversely arranged, it includes a plurality of first terminals arranged in one row and a plurality of second terminals arranged in another row, and the terminal base has an inner insulator integrally formed with the first terminals and the metal shielding sheet and an outer insulator overmolded on the inner insulator and the second terminal, the second terminal is assembled on one side of the inner insulator along the height direction. The manufacturing process and assembly of the socket connector are relatively convenient.

Description

socket connector

technical field

The invention relates to a socket connector, in particular to a socket connector capable of high-speed data transmission.

Background technique

The Universal Serial Bus (USB) connector is currently the most common connection interface for calculators. The USB connector is a plug-and-play external bus that can be used to connect a variety of peripheral devices, including speakers, telephones, and game shakers. rods, printers, scanners and cameras, etc. With the popularization of USB connectors, USB connectors have been widely used in charging and data transmission fields.

With the development of the electronic industry, the disadvantages of the existing USB2.0 receptacle connectors, which need to be plugged in separately and the transmission rate is not high, are gradually emerging. In order to make the front and back sides of the USB receptacle connector can be plugged in, it is common practice to add a set of corresponding conductive terminals to the lower surface of the mating tongue of the USB receptacle connector. In order to increase the transmission rate of the USB receptacle connector, it is common practice to increase the number of conductive terminals. This approach will cause a series of problems, such as the poor strength of the socket connector, which is easily damaged after multiple insertions; it is inconvenient to form and assemble between the conductive terminal and the insulating body of the socket connector and the butt tongue; The conductive terminals will generate signal interference between each other and affect the quality of electrical signal transmission.

A socket connector that can be inserted into both the front and back sides, easy to assemble, strong in structure, and high in electrical signal transmission quality appears, which can be convenient for users to use. As a new generation product of USB 3.0 connector, the USB Type-C connector not only no longer has a directional plug interface, that is, the plug connector can be inserted into the socket connector in both directions, but also supports a data transmission speed of 10Gbit/s . The USB Type-C connector includes a plastic base, upper and lower rows of conductive terminals arranged on the plastic base, and a shielding sheet sandwiched between the upper and lower rows of conductive terminals. The plastic seat body includes upper and lower bodies and insulating bodies that are injection molded outside the upper and lower bodies, and the upper and lower bodies are respectively injection molded outside the two rows of conductive terminals, so three injection moldings are required to complete the production of the socket connector.

Therefore, it is necessary to provide an improved socket connector to overcome the above problems.

Contents of the invention

The object of the present invention is to provide a receptacle connector with stable structure and easy manufacture.

In order to achieve the purpose of the above invention, the present invention provides a socket connector, which includes a terminal base, conductive terminals disposed in the terminal base in two rows, and a metal shielding sheet disposed between the two rows of conductive terminals along the height direction , the two rows of conductive terminals are corresponding and reversely arranged, which include a plurality of first terminals arranged in one row and a plurality of second terminals arranged in another row, and the terminal base has a An inner insulator molded into one piece and an outer insulator overmolded on the inner insulator and the second terminal, and the second terminal is assembled on one side of the inner insulator along the height direction.

As a further improvement of the present invention, the metal shielding sheet and the first terminals connected with the first terminal strips are stacked at intervals in the height direction and then embedded and molded in the inner insulator.

As a further improvement of the present invention, the second terminal connected with the second terminal strip is assembled on the upper side of the inner insulator along the height direction, and the fixing part of each conductive terminal in the second terminal is inserted and fixed on the In the corresponding holding groove provided on the upper surface of the inner insulator.

As a further improvement of the present invention, the upper surface of the inner insulator protrudes upwards to form two rows of barriers, each row of barriers is arranged in a row along the transverse direction, and the two adjacent barriers in the same row The holding grooves are formed at intervals between the partitions.

As a further improvement of the present invention, the inner insulator has a rear side portion located at its rear side, a front side portion located at its front side, and a joint portion connecting the front side portion with the rear side portion, and the front row of the partitions The column is located on the upper side of the joint part, and the partition bars in the rear row are located on the upper side of the rear side part.

As a further improvement of the present invention, one of the top and bottom surfaces of the inner insulator is recessed toward the center plane extending in the horizontal direction of the socket connector to form at least one receiving groove for the melting of the outer insulator. Inflow of plastic material.

As a further improvement of the present invention, the receptacle connector also has a shielding shell covering the periphery of the terminal base, and the two sides of the base in the transverse direction respectively protrude outward in the transverse direction to form a pair of opposite positioning parts , the positioning portion is located at the top rear end of the base portion and fixedly fits with the shielding case.

As a further improvement of the present invention, the two sides of the rear end of the shielding housing are respectively provided with a positioning slot, the positioning slot is formed by being recessed forward from the rear end of the shielding housing, which is opened backward and guides the positioning slot along the transverse direction. The shielding shell penetrates through, so that the positioning slot communicates with the inner space of the shielding shell, and the positioning part protrudes outward into the positioning slot on the corresponding side.

As a further improvement of the present invention, the metal shielding sheet includes a main body, a pair of locking parts located on both sides in the transverse direction of the main body and protruding outward, and a pair of locking parts located on the front side corresponding to the corresponding locking part. A pair of connectors attached to the shield sheet stock.

As a further improvement of the present invention, before forming the outer insulator, the shielding strip is removed from the front ends of the pair of connecting parts, and when the metal shielding sheet is formed in the outer insulator, the locking part and The connecting parts are wrapped in the outer insulator and do not protrude outward from the terminal seat.

The beneficial effects of the present invention are: the terminal seat of the socket connector in the present invention is only composed of an inner insulator and an outer insulator, wherein the inner insulator is injection-molded on the periphery of the first terminal and the metal shielding sheet, when the second terminal is assembled to the inner insulator along the height After one side in the direction, the outer insulator is overmolded on the inner insulator and the second terminal, and only two injection moldings are required to complete the molding of the socket connector, the manufacturing process is simple, and the structure is stable.

Description of drawings

Fig. 1 is a three-dimensional assembly view of a socket connector in a preferred embodiment of the present invention;

Fig. 2 is a view of another angle of view of the socket connector shown in Fig. 1;

Fig. 3 is a three-dimensional exploded view of the socket connector shown in Fig. 1;

Fig. 4 is a view of another angle of view of the socket connector shown in Fig. 3;

Fig. 5 is a further exploded view of the socket connector shown in Fig. 3 after the shielding shell is removed;

Fig. 6 is a perspective view of the inner insulator in the socket connector shown in Fig. 4 combined with the metal shielding sheet and two rows of conductive terminals without removing the strip;

Fig. 7 is a schematic perspective view of the socket connector shown in Fig. 6 after the outer insulator is formed and before the shielding shell is assembled;

Fig. 8 is a three-dimensional assembly view of the socket connector shown in Fig. 3 after removing the shielding shell and the outer insulator;

FIG. 9 is a schematic perspective view of the receptacle connector shown in FIG. 8 with the inner insulator removed.

Detailed ways

The present invention will be described in detail below in conjunction with various embodiments shown in the drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional changes made by those skilled in the art according to these embodiments are included in the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 9 which show a preferred embodiment of the socket connector 100 of the present invention. The socket connector 100 of the present invention is installed on a circuit board (not shown), which includes a terminal base 1, conductive terminals 2 arranged in two rows in the terminal base 1, and metal wires arranged between the two rows of conductive terminals 2. The shielding sheet 3 and the shielding shell 4 covering the periphery of the terminal base 1 . The two rows of conductive terminals 2 include a plurality of first terminals 21 arranged in one row and a plurality of second terminals 22 arranged in the other row. The metal shielding sheet 3 is generally made of metal material and has conductivity.

Please refer to FIG. 3 to FIG. 5 and FIG. 7. In this embodiment, the terminal base 1 includes an inner insulator 11 integrally formed with the first terminal 21 and the metal shielding sheet 3 and an overmolded inner insulator 11. And the outer insulator 12 outside the second terminal 22, the second terminal 12 is assembled on one side of the inner insulator 11 along the height direction.

The inner insulator 11 is injection molded around the first terminal 21 and the metal shielding sheet 3 to form a whole. The metal shielding sheet 3 and a row of the first terminals 21 are stacked at intervals in the height direction and then embedded and molded on the first terminal 21. In the inner insulator 11, in this embodiment, the first terminal 21 is a lower row of terminals, in other embodiments, the metal shielding sheet 3 can also be embedded with the second terminal 22 (upper row of terminals) Formed on the inner insulator 11.

In this embodiment, the inner insulator 11 has a rear portion 111 at its rear, a front portion 112 at its front, and a joint portion 113 connecting the front portion 112 with the rear portion 111 . The width of the front side portion 112 along the transverse direction is smaller than the width of the joint portion 113 , and the width of the joint portion 113 is smaller than the width of the rear side portion 111 .

The front side portion 112 of the inner insulator 11 has a plurality of through holes 1121 formed through the height direction, the through holes 1121 are arranged in a row along the transverse direction, and the butt joint portion 24 of each first terminal 21 is correspondingly provided with One through hole 1121 is used to effectively locate the butt joint 24 of the first terminal 21 during injection molding, and the through hole 1121 is shielded by the butt joint 24 corresponding to the first terminal 21 on the lower side of the inner insulator 11 .

The upper surface of the front side portion 112 also has a number of spacers 1123 located at the front end and arranged at intervals, and the terminal head of the conductive terminal 2 is clamped and limited between two adjacent spacers 1123, so that the terminal effective positioning of the head.

The upper surface of the inner insulator 11 protrudes upwards to form two rows of partitions 1112 and 1131 at the front and rear, wherein the front row of partitions 1131 is located on the upper side of the joint portion 113 , and the rear row of partitions 1112 is located at the rear side 111 on the upper side. Each row of partitions 1112 , 1131 is arranged in a row along the transverse direction, and two adjacent partitions 1112 , 1131 in the same row are formed with holding grooves 114 at intervals. The two rows of partitions 1112, 1131 are separated by a certain distance along the front-to-rear direction, and at the same time, each corresponding two rows of partitions 1112, 1131 are aligned along the front-to-rear direction. The top of each partition 1112 , 1131 is provided with an inclined guiding surface 1141 along at least one side thereof in the transverse direction, so that the top opening of the locking groove 114 is larger than the bottom opening.

In this embodiment, the top and bottom surfaces of the joint portion 113 are respectively recessed toward the central surface extending in the horizontal direction of the receptacle connector 100 to form at least one first receiving groove 1132. In addition, the top, bottom surfaces of the rear side portion 111 At least one second receiving groove 1113 is formed on the bottom surface respectively recessed toward the central surface, and the first and second receiving grooves 1132 and 1113 are collectively referred to as receiving grooves. In other embodiments, at least one accommodating groove 1132, 1113 may be formed on only one of the top and bottom surfaces of the joint portion 113 or the rear side portion 111, which is recessed toward its center surface, that is, the top of the inner insulator 11. , one of the bottom surfaces is recessed toward its central surface to form at least one receiving groove 1132 , 1113 . The first receiving slot 1132 is located between the front and rear rows of partitions 1112 and 1131 along the front and rear directions.

The inner insulator 11 has a plurality of positioning holes 1122, 1133 recessed from its top and bottom surfaces to its central surface, and a pair of positioning holes 1122, 1133 are respectively provided on the front side part 112 and the joint part 113, so as to facilitate injection molding. The metal shielding sheet 3 is effectively positioned when the inner insulator 11 is formed. The pair of positioning holes 1122 on the front side portion 112 are symmetrically arranged, and the pair of positioning holes 1133 on the joint portion 113 are symmetrically arranged.

The outer insulator 12 has a base portion 121 at its rear side, a tongue portion 122 at its front side, and an intermediate portion 123 between the base portion 121 and the tongue portion 122 . The tongue portion 122 has two opposite surfaces along the height direction, and the butt joint portions 24 of the two rows of conductive terminals 2 are respectively disposed on the two surfaces of the tongue portion 122 .

Both sides of the base 121 in the transverse direction protrude outwards in the transverse direction to form a pair of opposite positioning parts 1211, the positioning parts 1211 are located at the top rear end of the base 121 and are fixedly fitted with the shielding shell 4 . The front end of the top of the base portion 121 is recessed downwards and backwards to form a limiting groove 1212 , and the limiting groove 1212 is opened upwards and forwards. The base portion 121 also has a pair of locking slots 1213 recessed forward from its rear end, the pair of locking slots 1213 are arranged at intervals along the transverse direction, and are located between the pair of positioning portions 1211 .

When the inner insulator 11 is overmolded with the outer insulator 12, the base portion 121 covers the rear side portion 111, and the tongue plate portion 122 covers the front side portion 112, so that The middle portion 123 covers the outside of the joint portion 113 . Wherein, molten plastic material is filled into the receiving grooves 1113 , 1132 on the upper and lower sides of the inner insulator 11 , so as to form a reliable combination between the inner insulator 11 and the outer insulator 12 .

2 to 9, the conductive terminal 2 includes the first terminal 21 and the second terminal 22 arranged in two rows along the height direction, the first terminal 21 and the second terminal 22 are in phase. They are arranged correspondingly and oppositely, and are the same as the arrangement of the conductive terminals in the standard USB Type C receptacle connector.

Both the first terminal 21 and the second terminal 22 are provided with a pair of grounding terminals g, a pair of power supply terminals p and four signal terminals located between the pair of power supply terminals p, the pair of grounding terminals g are respectively located On both sides of the first terminal 21 or the second terminal 22 , the power terminal p is located inside the adjacent ground terminal g. The four signal terminals include a CC terminal, a D+ terminal, a D- terminal and an SBU terminal arranged in sequence; wherein the D+ terminal and the D- terminal are mainly used for transmitting USB 2.0 signals.

Each conductive terminal 2 in the first terminal 21 and the second terminal 22 has a fixing part 23 fixed to the inner insulator 11, and a tongue extending forward from the fixing part 23 and exposed to the outer insulator 12. The abutting portion 24 outside the plate portion 122 and the welding leg 25 extending out of the terminal base 1 . In this embodiment, the welding leg 25 and the butt joint portion 24 are arranged parallel to each other, and in the height direction, the solder leg 25 is located at the lower side of the butt joint portion 24 . In addition, the solder feet 25 of the first terminal 21 and the second terminal 22 are located in the same row (as shown in FIGS. 2 , 6 and 7 ), and are soldered to the circuit board by surface soldering.

At the same time, the welding legs 25 of the ground terminal g and the power terminal p in the first terminal 21 are arranged side by side with the corresponding welding legs 25 of the ground terminal g and the power terminal p in the second terminal 22 (as shown in Figures 2, 6 and 7). As shown), there is a certain distance between the signal terminals in the two rows of conductive terminals and the adjacent conductive terminals.

The terminal heads at the front ends of the first terminal 21 and the second terminal 22 are respectively connected to the corresponding front terminal strips. The soldering leg 25 of the first terminal 21 is connected to the first terminal strip 51, the soldering leg 25 of the second terminal 22 is connected to the second terminal strip 52, and the rear end of the soldering leg 25 is a strip connection part . When the second terminal 22 is assembled on the inner insulator 11 , the second terminal strip 52 is stacked on the upper surface of the first terminal strip 51 . In addition, in this embodiment, in order to prevent the first terminal material strip 51 from not completely overlapping the second terminal material strip 52, the first terminal material strip 51 and/or the second terminal material strip 52 are provided with a The first terminal strip 51 and the second terminal strip 52 are fixed by laser welding through the welding portion 501 .

Please refer to FIG. 3 to FIG. 9, the metal shielding sheet 3 is embedded and molded in the inner insulator 11 together with the first terminal 21 connected with the first terminal strip 51, and the second terminal strip 52 is connected. The second terminal 22 is assembled on the upper side of the inner insulator 11 integrally formed with the metal shielding sheet 3 and the first terminal 21, wherein the fixing part 23 of each conductive terminal in the second terminal 22 is on the inclined guide surface Under the guidance of 1141 , it is inserted into the corresponding holding groove 114 from top to bottom, and is held by interference with the corresponding holding groove 114 by means of the protrusions 231 provided on both sides thereof.

In this embodiment, on the basis of the interference and holding of the fixing part 23 and the holding groove 114, the barriers 1112 and 1131 on both sides of each holding groove 114 are further melted so that the melted material covers the said holding groove 114. on the fixing portion 23 to further securely position the second terminal 22 on the upper side of the inner insulator 11 . Of course, in other embodiments of the present invention, the positioning of the second terminal and the inner insulator 11 can also be realized only by using the interference and holding of the protruding portion 231 and the locking groove 114 .

The outer insulator 12 is overmolded outside the inner insulator 11 assembled with the second terminal 22, and the outline of the metal shielding sheet 3 roughly corresponds to the shape design of the opposite side surface of the outer insulator 12, and along the The height direction is located between the first terminal 21 and the second terminal 22 to effectively isolate the first terminal 21 and the second terminal 22 and prevent interference between the two rows of conductive terminals. In this embodiment, the metal shielding sheet 3 and the conductive terminal 2 are made of different materials, and the material of the metal shielding sheet 3 is harder than that of the conductive terminal 2, for example, the metal shielding sheet 3 can be made of an alloy material The conductive terminal 2 is made of copper. In other embodiments, the metal shielding sheet 3 can also be made of the same material as the conductive terminal 2 .

Please refer to FIG. 5 and FIG. 9, the metal shielding sheet 3 is a sheet-like structure arranged horizontally, which includes a U-shaped main body portion 31 and two sides located in the lateral direction of the main body portion 31 and protruding outwards. A pair of locking parts 32. The main body portion 31 of the metal shielding sheet 3 is provided with a notch 311 and a pair of through holes 312 passing through it along the height direction. The through holes 312 are located on both sides of the notch 311 along the transverse direction. In this embodiment, the pair of through holes 312 are located on the front side of the notch 311 in the front and back directions.

The gap 311 is formed by a pair of opposite sidewalls 3112 and a transverse wall 3113 connected to the pair of sidewalls 3112. The sidewalls 3112 extend along the front-to-back direction. The walls 3112 are respectively located outside the power terminals p adjacent thereto.

The main body portion 31 also has a pair of first receiving holes 313 located on both sides of the notch 311 along the lateral direction and a pair of second receiving holes 314 located inside the corresponding locking portion 32. The first receiving holes 313 The second accommodating hole 314 penetrates the main body 31 along the height direction as an unclosed structure formed by inwardly indenting from the corresponding side edge of the main body 31 along the transverse direction. The molten plastic material used to form the inner insulator 11 enters into the first and second receiving holes 313 , 314 to strengthen the bonding strength between the metal shielding sheet 3 and the inner insulator 11 .

During the embedded molding process, insert the thimble (not shown) into the notch 311 and the through hole 312 to clamp the metal shielding sheet 3 and the first terminal 21 up and down, so as to ensure the position of the metal shielding sheet 3 and Coplanarity of each first terminal 21 . At the same time, the molten plastic material used to form the outer insulator 12 enters the notch 311 and the through hole 312 to strengthen the bonding strength between the metal shielding sheet 3 and the outer insulator 12 .

The metal shielding sheet 3 also has a pair of connecting parts 33 located on the front side corresponding to the corresponding locking part 32, and the metal shielding sheet 3 is connected to the shielding sheet material tape (not shown) through the connecting parts 33 on the front side. shown), that is, the shielding sheet strip connected to the metal shielding sheet 3 is located on the front side of the terminal base 1 .

After the metal shielding sheet 3 is embedded and molded in the inner insulator 11 , the locking portion 32 protrudes outward from the outer side of the inner insulator 11 , and the connecting portion 33 is exposed at the front end of the inner insulator 11 In order to facilitate the cutting of the shielding strip, the main body part 31 is exposed outside the inner insulator 11 in the lateral direction and adjacent to the rear side of the locking part 32, and the rest is covered by the inner insulator 11. inside the inner insulator 12, and the rear end surface of the metal shielding sheet 3 is buried inside the rear side portion 111 of the inner insulator 11, in other words, the metal shielding sheet 3 does not protrude backward from the inner insulator 11. Any structure outside, which is a short body structure with only two sides protruding outside the inner insulator 11, so that the metal shielding sheet 3 does not have the traditional structural features such as solder feet for welding with the circuit board, eliminating the need for subsequent Assembly and welding process.

Before forming the outer insulator 12, the shielding strip is removed from the front ends of the pair of connecting parts 33. After the metal shielding sheet 3 is formed in the outer insulator 12, the locking part 32 and the connecting part 33 are all wrapped in the outer insulator 12 of the terminal block 1 and do not protrude outward from the terminal block 1. When docking with the docking connector, the part corresponding to the outer insulator 12 made of plastic material and the locking part 32 is in contact with the docking connector lock. The buckle can avoid the wear of the butt connector caused by the metal shielding sheet 3 made of metal directly sliding against the butt connector, and the butt connection is relatively smooth.

Referring to FIG. 1 to FIG. 4 , the shielding shell 4 is arranged in an elliptical tubular shape as a whole and wraps around the periphery of the terminal base 1 . The shielding housing 4 has a pair of limiting pieces 41 bent downward from its top wall and extending obliquely, and at least one convex structure 42 protruding from its top wall and/or bottom wall into its tubular space. The limiting piece 41 is located at the rear end of the shielding shell 4 and extends downward into the locking groove 1213 corresponding to the rear end of the outer insulator 12 , and the convex structure 42 protrudes into the limiting groove 1212 .

The two sides of the rear end of the shielding shell 4 are respectively provided with a positioning gap 43, the positioning gap 43 is formed from the rear end of the shielding shell 4. It is recessed forward, and it is opened backward and the shielding shell is positioned along the transverse direction. Body 4 penetrates through, so that the positioning slot 43 communicates with the tubular space of the shielding shell 4, and the positioning parts 1211 on both sides of the outer insulator 12 protrude outward into the positioning slot 43 on the corresponding side to limit the external The insulator 12 is displaced forward and at the same time constrains the terminal base 1 in the tubular space of the shielding housing 4 in the lateral direction. Two sides of the shielding housing 4 have several mounting feet 44 extending downwards for fixing the socket connector 100 on the circuit board.

The terminal base 1 of the socket connector in the present invention is only composed of an inner insulator 11 and an outer insulator 12, wherein the inner insulator 11 is injection-molded on the periphery of the first terminal 21 and the metal shielding sheet 3, when the second terminal 22 is assembled to the inner insulator 11 along After one side in the height direction, the outer insulator 12 is overmolded outside the inner insulator 11 and the second terminal 22 , and only two injection moldings are required to complete the molding of the socket connector. The manufacturing process is simple and the structure is stable.

It should be understood that although this description is described according to implementation modes, not each implementation mode only contains an independent technical solution, and this description in the description is only for clarity, and those skilled in the art should take the description as a whole, and each The technical solutions in the embodiments can also be properly combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for feasible implementations of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent implementation or implementation that does not depart from the technical spirit of the present invention All changes should be included within the protection scope of the present invention.

Claims (10)

1. A socket connector, which comprises a terminal block, two rows of conductive terminals arranged in the terminal block and a metal shielding sheet arranged between the two rows of conductive terminals along the height direction, and the two rows of conductive terminals are connected to each other. Correspondingly and reversely arranged, it includes a number of first terminals arranged in one row and a number of second terminals arranged in another row. The inner insulator and the outer insulator overmolded on the inner insulator and the second terminal, and the second terminal is assembled on one side of the inner insulator along the height direction. 2. The receptacle connector according to claim 1, wherein the metal shielding sheet and the first terminal connected with the first terminal strip are stacked at intervals in the height direction and then embedded and molded in the inner insulator Inside. 3. The receptacle connector according to claim 2, characterized in that: the second terminal connected with the second terminal strip is assembled on the upper side of the inner insulator along the height direction, and each of the second terminals The fixing part of the conductive terminal is inserted and fixed in the corresponding locking groove provided on the upper surface of the inner insulator. 4. The receptacle connector according to claim 3, characterized in that: the upper surface of the inner insulator protrudes upwards to form two rows of barriers, each row of barriers is arranged in a row along the transverse direction, The clamping grooves are formed at intervals between two adjacent partitions in the same row. 5. The receptacle connector as claimed in claim 4, wherein the inner insulator has a rear portion located at its rear side, a front portion located at its front side, and a connection between the front portion and the rear portion. As for the connected joint parts, the partition bars in the front row are located on the upper side of the joint part, and the partition bars in the rear row are located on the upper side of the rear side part. 6. The receptacle connector according to any one of claims 1 to 5, wherein one of the top and bottom surfaces of the inner insulator is recessed toward the central surface extending in the horizontal direction of the receptacle connector At least one receiving groove for the molten plastic material used to form the outer insulator to flow into. 7. The receptacle connector according to claim 6, characterized in that: the receptacle connector also has a shielding shell covering the periphery of the terminal base, and the two sides of the base in the transverse direction are respectively outward along the transverse direction The protrusion forms a pair of opposite positioning parts, and the positioning parts are located at the top rear end of the base part and fixedly fit with the shielding shell. 8. The receptacle connector according to claim 7, characterized in that: the two sides of the rear end of the shielding shell are respectively provided with a positioning slot, and the positioning slot is formed by a frontal depression from the rear end of the shielding shell, It is open to the rear and penetrates the shielding shell along the transverse direction, so that the positioning slot communicates with the inner space of the shielding shell, and the positioning part protrudes outward into the positioning slot on the corresponding side. 9. The receptacle connector according to any one of claims 1 to 5, wherein the metal shielding sheet comprises a main body, two sides in the lateral direction of the main body and protruding outwards A pair of locking parts and a pair of connecting parts located on the front side corresponding to the corresponding locking parts to connect with the shielding strip. 10. The receptacle connector according to claim 9, wherein before forming the outer insulator, the shielding strip is removed from the front ends of the pair of connecting parts, and when the metal shielding sheet is formed on the outer After being inside the insulator, the locking part and the connecting part are wrapped in the outer insulator and do not protrude outward from the terminal seat.