CN115021006A

CN115021006A - Cable connector

Info

Publication number: CN115021006A
Application number: CN202210586683.8A
Authority: CN
Inventors: 李栋; 刘成荫; 阎瑞兵; 谢亚军; 孙海洋; 陈功轩
Original assignee: China Aviation Optical Electrical Technology Co Ltd
Current assignee: China Aviation Optical Electrical Technology Co Ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-09-06

Abstract

The invention relates to a cable connector, which comprises a shell, terminal modules and a lock catch, wherein an accommodating cavity for accommodating the terminal modules is formed in the shell, each terminal module is inserted into the accommodating cavity of the shell along the front-back direction, a plurality of terminal modules are arranged in the accommodating cavity in a stacking manner along the thickness direction, lock catch slots communicated with the accommodating cavity are symmetrically formed in two sides of the outer part of the shell, and the lock catch is inserted into the lock catch slots along the direction vertical to the inserting direction of the terminal modules; the terminal module comprises an insulating base and a plurality of shielding cable assemblies arranged on the insulating base along the width direction of the terminal module, the front end of each shielding cable assembly is provided with a contact end, two sides of the insulating base are respectively provided with a locking groove, and the lock catch is provided with a locking arm matched with the locking groove; when locking, the locking arm enters the accommodating cavity through the locking slot and is in stop fit with the locking slot in the front-back direction. The cable connector disclosed by the invention adopts the lock catch to realize batch assembly and positioning of the terminal module, improves the assembly and disassembly efficiency of the terminal module and is beneficial to the miniaturization design of the connector.

Description

Cable connector

Technical Field

The invention belongs to the technical field of high-speed cable connectors, and particularly relates to a cable connector.

Background

In the prior art, a high-speed cable connector generally includes a plurality of terminal modules, the terminal modules are arranged in a housing of the cable connector along a certain direction, the terminal modules are generally fixed in a manner that a fastening structure is arranged on a side portion of the terminal module, a corresponding clamping groove is arranged in the housing, independent fixation of a single terminal module is achieved through a fastening fit manner, and finally the terminal modules are sequentially positioned. However, in this fixing method, the corresponding buckle is inevitably arranged at the side of the terminal module, the buckle is generally an elastic buckle, and a certain swing amount needs to be provided on the width of the terminal module, so that not only is the processing method complicated, but also the space of the terminal module in the width direction is occupied, so that the overall size of the connector is large, the cost is high, the elastic buckle structure is easy to break, the fixing failure is caused, the terminal modules are independently locked during assembly, tools are required to be used for sequential disassembly during disassembly, and the assembly and disassembly efficiency needs to be improved.

Disclosure of Invention

In order to solve the problems in the prior art, the present invention provides a cable connector to improve the assembling and disassembling efficiency of a terminal module.

The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The cable connector comprises a shell, terminal modules and a lock catch, wherein an accommodating cavity for accommodating a plurality of terminal modules is formed in the shell, each terminal module is inserted into the accommodating cavity of the shell along the front-back direction, the terminal modules are arranged in the accommodating cavity in a stacking manner along the thickness direction, lock catch slots are symmetrically formed in two sides of the outer part of the shell and are communicated with the accommodating cavity, the lock catch is inserted into the corresponding lock catch slot along the direction perpendicular to the insertion direction of the terminal modules, and the lock catch and the corresponding lock catch slot are in blocking fit in the front-back direction; the terminal module comprises an insulating base and a plurality of shielding cable assemblies arranged on the insulating base along the width direction of the terminal module, the front end of each shielding cable assembly is provided with a contact end extending out of the front end face of the shell, two sides of the insulating base are respectively provided with a locking groove, the locking catches are provided with locking arms which are in one-to-one corresponding fit with the locking grooves, and the locking arms extend along the width direction of the terminal module; when locking, the locking arm enters the accommodating cavity through the locking slot and is in stop fit with the locking slot in the front-back direction.

Further, be equipped with on the locking arm and adorn the arch by force, the hasp slot includes and accepts the via hole of chamber intercommunication, and the locking arm is through adorning protruding and the inner wall that corresponds the via hole by force the assembly to realize that the hasp is in the location under the locking state.

Furthermore, each shielding cable assembly comprises a cable, a shielding shell and a terminal, the front end of the terminal is a contact end, the terminal is installed in the shielding shell through an insulator, and two terminals forming a differential pair are arranged in parallel in each insulator; the cable comprises a cable insulating layer, an inner conductor arranged in the cable insulating layer, a shielding layer arranged outside the cable insulating layer and a shielding sheet riveted on the outer side of the front end of the shielding layer, the shielding sheet is riveted with the shielding shell, and the inner conductor is connected with wiring ends at the rear ends of the terminals in a one-to-one correspondence manner;

the terminal module further comprises a shielding buckle plate, the shielding buckle plate is buckled on the insulating base, the shielding buckle plate covers all shielding shells in the same terminal module, and the shielding buckle plate is in contact conduction with the shielding shells.

Furthermore, the shell is communicated front and back, and a conductive plastic plate is fixedly arranged inside the front end of the shell;

the terminal module installs the back in acceping the chamber of casing, and the preceding terminal surface of all shielding shells all contacts with the rear end face contact of electrically conductive plastic board in each terminal module sets up the shielding chamber that holds the contact end of each difference pair on the electrically conductive plastic board, and the shielding chamber front end is opened so that the contact end can stretch out forward.

Furthermore, electrically conductive plastic board has set firmly the shielding otter board towards the terminal surface of PCB board on, set up on the shielding otter board and keep away the hole with the corresponding signal terminal of difference pair, still is provided with the convex ground connection bullet needle to PCB board direction on the shielding otter board, ground connection bullet needle be used for with the PCB board on the ground structure be connected.

Furthermore, the signal terminal avoiding holes and the grounding spring pins arranged in each row on the shielding screen plate are alternately arranged along the width direction of the corresponding terminal module.

Furthermore, the accommodating cavity comprises a plurality of slots which are arranged along the stacking direction of the terminal modules, the slots are used for guiding and inserting the corresponding terminal modules, and the two sides of each slot are provided with limiting steps at positions close to the conductive plastic plates; the two sides of the insulating base are provided with adaptive limiting surfaces which are in blocking fit with the corresponding limiting steps in the forward direction; when the adaptive limiting surface is abutted to the limiting step, the locking arm on the lock catch can be inserted into the corresponding locking groove.

Furthermore, a guide groove extending in the front-back direction is formed in the limiting step, guide ribs which are located in the front of the adaptive limiting surface and extend in the front-back direction are arranged on two sides of the insulating base, and the guide ribs are matched with the guide groove in a sliding guide mode in the front-back direction.

Further, adjacent slots are arranged in a staggered manner in the width direction of the terminal module.

Furthermore, the contact end of the terminal is a spring plate type contact end, and the bending directions of the contact ends in two adjacent terminal modules are opposite.

By means of the technical scheme, the cable connector disclosed by the invention adopts the lock catches to realize the fixed assembly of the plurality of terminal modules, the plugging and unplugging directions of the lock catches are vertical to the assembling and disassembling directions of the terminal modules, and the locking strength is high; the terminal module locking device can lock a plurality of terminal modules in batches through the lock catch, avoids arranging a locking structure on the terminal modules, reduces the production cost, is beneficial to the miniaturization design of the terminal modules, and is also beneficial to improving the assembly and disassembly efficiency of the cable connector.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are specifically described below with reference to the accompanying drawings.

Drawings

Fig. 1 is a perspective view of a cable connector according to the present invention.

Fig. 2 is a perspective view of the high-speed cable connector assembly according to the present invention.

Fig. 3 is a perspective view of a terminal module in the present invention.

Fig. 4 is an exploded view of the terminal module of the present invention.

Fig. 5 is an exploded view of the terminal module of the present invention without the injection molded body.

Fig. 6 is a schematic view of the connection of the cable to the shield case in the present invention.

Fig. 7 is a schematic diagram of the contact ends of the differential pairs in resilient contact with the PCB board in the present invention.

Fig. 8 is a schematic view of the front end structure of the cable of the present invention.

Fig. 9A to 9B are structural views of the shield plate in the present invention.

FIG. 10 is an exploded view of the latch and housing of the present invention.

Fig. 11 is a schematic view of the structural matching relationship among the latch, the housing, the conductive plastic plate and the terminal module according to the present invention.

Fig. 12 is a perspective view of the latch of the present invention.

Fig. 13 is a perspective view of the housing of the present invention.

Fig. 14 is a schematic view of the mating relationship between the latch and the terminal module of the present invention.

Fig. 15 is a cross-sectional view of the latch mated with the terminal module when inserted into a locked position.

Fig. 16 is an enlarged view of a portion a in fig. 15.

Fig. 17 is a schematic view of a shield mesh plate in the present invention.

Fig. 18 is a bottom view of a cable connector in accordance with the present invention.

Figure 19 is a schematic diagram of the position relationship between the contact ends of the differential pairs and the ground pins of the adjacent row in the second direction in the present invention.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the accompanying drawings and preferred embodiments.

Referring to fig. 1 to 18, an embodiment of a high-speed cable connector assembly includes a cable connector 1 and a PCB 2, where one end of the cable connector connected to the PCB is defined as a front end.

The cable connector 1 includes a housing 11 and a plurality of terminal modules 12, wherein the plurality of terminal modules 12 are arranged in a first direction in a receiving cavity 110 of the housing 11, and the terminal modules are inserted forward into the receiving cavity of the housing in a plug-in manner along a front-back direction, each terminal module 12 includes an insulating base 121, a shielding buckle 122 and a plurality of shielding cable assemblies 123 arranged in the insulating base in a second direction; in this embodiment, each of the insulation bases 121 is provided with four mounting grooves 1211 for receiving the corresponding shielded cable assembly, and the four mounting grooves are spaced along the second direction. The first direction is vertical to the second direction, and the plane where the first direction and the second direction are located is parallel to the plane where the PCB is located; the first direction is a width direction of the terminal modules, and the second direction is a thickness direction of the terminal modules, so the terminal modules are provided in the housing in a stacked arrangement in the thickness direction.

The shielded cable assembly 123 includes a cable 1231, a shield shell 1232, a terminal 1233, and an insulator 1234, wherein the terminal 1233 is fixed within the insulator 1234; the terminals are connected with the insulators in an injection molding mode, two terminals 1233 are arranged in each insulator in parallel at intervals, the two terminals form a differential pair 1230 used for transmitting high-speed signals, and the differential pair is positioned in a corresponding shielding shell 1232 through the insulators. The shielding housing 1232 is of a U-shaped sheet structure as a whole, and the front, the rear and the top of the shielding housing are open, so that a U-shaped cavity is formed; in this embodiment, the positioning groove 12321 is opened on both sides of the shielding shell 1232, the side of the insulator 1234 is provided with the positioning protrusion 12341 engaged with the positioning groove, and further, the positioning protrusions between the adjacent insulators in the same terminal module are connected to each other to form the connecting arm 12342, the connecting arm 12342 is engaged in the positioning groove 12321, so that a plurality of insulators in the same terminal module form a one-piece insulator, which is not only beneficial to batch installation of shielded cable assemblies, but also beneficial to keeping the distance of each differential pair in the front-back direction consistent, and especially improves the coplanarity of one end of all the differential pairs engaged with the PCB. The terminal 1233 is the contact end 12331, the fixed section and the wiring end 12332 from front to back in order, the fixed section is embedded in the insulator, and the contact end is arranged outside the front end of the shielding shell in a hanging manner. In the embodiment, the contact end adopts the elastic sheet type contact end which is a C-shaped elastic sheet, the LGA elastic sheet structure can realize elastic contact conduction with a PCB, the connection reliability is higher, the LGA elastic sheet structure is suitable for a complex working condition environment, and the connection conduction form is convenient.

The cable 1231 includes shield blades 12311, a shield 12312, a cable insulation layer 12313, and inner conductors 12314 disposed within the cable insulation layer, the inner conductors being arranged in pairs that mate with the two contact ends in a differential pair in a one-to-one correspondence. The cable insulating layer adopts whole one shot forming, does benefit to cable stability control, can realize complicated processes such as foaming, and the cable insulating layer realizes relatively fixed with inner conductor as an organic whole injection moulding, and the inner conductor is fixed in the cable insulating layer as the stable fixing of mold insert, prevents between the mated inner conductor drunkenness each other, influences high speed performance. A shielding layer 12312 is arranged outside the cable insulating layer; the shield sheet 12311 is riveted to the outside of the front end of the shield layer 12312. In this embodiment, the cross-section of cable insulating layer is oval to two inner conductors arrange along oval major axis direction interval in its inside. The inner conductor penetrates out of the cable insulating layer from the front end of the cable, the inner conductor 12314 is connected with the wiring end 12332 of the terminal in a one-to-one corresponding welding mode, UV glue 12315 is coated on the welding position after welding, and sealing protection is achieved after the UV glue is cured.

With reference to fig. 9A and 9B, the shielding sheet 12311 includes a shielding sheet main body 123111 extending forward and backward, the front end of the shielding sheet main body extends and bends to both sides respectively to form a pair of riveting main bodies 123112, the riveting main bodies are in an arc-shaped sheet structure, the riveting main bodies are used for contacting and matching with the outer surface of the shielding layer, and the riveting main bodies are used as the whole shielding sheet to be responsible for the part contacting with the shielding layer in a large area, so as to ensure the stability of shielding conduction. The rear end of the shield sheet main body portion is bent and extended toward both sides to form a pair of caulking portions 123113, which are used to pinch the shield layer 12312 and serve as portions for fixing the entire shield sheet. The riveting main part and the riveting branch part are provided with a gap 123114, namely, the riveting main part and the riveting branch part are arranged at intervals, so that independent riveting is facilitated in the riveting process, and mutual influence is prevented. It can be seen through the comparison, after the shielding plate riveted, the movable end radial distance of two riveting branch portions was great than the movable end of two riveting main parts, guaranteed the area of contact of riveting main part and shielding layer on the one hand, and on the other hand ensured that riveting branch portion possesses stronger riveting effect. Of course, the rivet main body portion can also perform a certain degree of rivet fixing, and the rivet branch portion can also perform a certain degree of shield conduction.

The shielding shell 1232 and the shielding plate 12311 are riveted, in this embodiment, the rear end bilateral symmetry of the shielding shell 1232 is provided with the first riveting claw 12321, and the first riveting claw is used for riveting the outer wall of the riveting main body part of the shielding plate. In order to strengthen the riveting fixation between the high-speed cable and the shielding shell and increase the number of contacts, the rear end of the shielding shell is symmetrically provided with a second riveting claw 12322 which is formed by extending and bending the rear end surface of the shielding shell backwards, and the second riveting claw is in riveting fit with the riveting branch part. The first riveting claw is formed by extending and bending the rear end face of the shield shell towards the end face (i.e. the upper end face) of the shield pinch plate 122 towards the inside of the shield shell. After the cable is fixed, the bottom of the shielding sheet 12311 is in contact with the bottom surface of the inner wall of the shielding shell, and in order to ensure large-area surface contact, the movable end of the riveting main body part is arranged to be a plane; after the shielding shell is riveted with the cable and positioned relatively, the shielding shell realizes that the cable is shielded in a three-side surrounding mode. After the shielded cable assembly is arranged in the mounting groove, the shielding buckle plate 122 is buckled on the insulating base 121, the shielding buckle plate 122 covers all the shielding shells 1232 in the same terminal module, and the shielding buckle plate 122 is in contact with the upper end face of each shielding shell 1232, so that the full-surrounding shielding of the joint of the cable and the terminal is realized, and the shielding shells in the same terminal module are grounded. In this embodiment, the shielding buckle 122 is provided with a fixing hole 1221, and the insulating base 121 is provided with a fixing bump 1212 that is in forced fit with the fixing hole, so as to implement the mounting and positioning of the shielding buckle and the reliable contact with the shielding shell. In order to improve the connection reliability of the shielding shell and the shielding buckle plate, the upper end surface of the shielding shell and the contact part of the shielding buckle plate can be welded by further using a laser welding technology.

The rear end of the insulating base 121 is provided with an injection molding body 124, and the injection molding body 124 is integrally connected with the insulating base 121 and used for plastic sealing and fixing the tail of the shielded cable assembly. The injection molding body wraps the front end of the cable and accommodates the shielding sheet inside. The injection molding body fixes the insulating base and the front ends of the cables arranged in rows into a whole, so that the assembly positioning of the shielding cable assembly is realized. In addition, through grooves 1214 are formed on the ribs 1213 between adjacent mounting grooves on the insulating base 121, and the connecting arms 12342 between adjacent insulators fall into the through grooves 1214, so that the two are in blocking fit in the front-rear direction, and the assembly and positioning of the shielded cable assembly in the front-rear direction can also be realized.

The casing 11 is run through from front to back, and the inside electrically conductive plastic board 13 that has set firmly of front end of casing 11, electrically conductive plastic board and casing force fit, and a plurality of terminal modules 12 are installed in casing 11 back, and terminal surface all contacts with this electrically conductive plastic board 13 before all shielding shell 1232 in each terminal module to realize all shielding shell's common ground. Set up the shielding chamber 131 that holds the contact end that supplies each difference pair on the electrically conductive plastic board 13, shielding chamber 131 front end is opened, will differentiate to shield between the pair and keep apart, reduces the cross talk between the difference pair. The end face, facing the PCB, of the conductive plastic plate 13 is fixedly provided with a shielding screen plate 14, the shielding screen plate 14 is provided with a plurality of clamping convex parts (not shown), the conductive plastic plate 13 is provided with corresponding clamping concave parts (not shown), and the clamping convex parts and the clamping concave parts are in forced fit, so that the fixed connection and the stable contact conduction of the shielding screen plate and the conductive plastic plate can be realized; the fixing form of the shielding mesh plate and the conductive plastic plate is similar to that of a shielding buckle plate and an insulator seat, but the clamping convex part is arranged at the outer side of the shielding mesh plate close to the edge position.

The shielding mesh plate 14 is provided with signal terminal avoiding holes 141 corresponding to the differential pairs 1230, so that after the shielding mesh plate is mounted on the front end face of the cable connector, the contact ends of the differential pairs penetrate through the corresponding signal terminal avoiding holes and are electrically connected with the PCB. The shielding mesh plate 14 is provided with a grounding elastic pin 142 protruding towards the PCB direction, and the grounding elastic pin 142 is used for being connected with a grounding structure on the PCB. The invention makes up the gap between the shielding mesh plate and the PCB plate by the grounding elastic needle, thereby enhancing the shielding effect.

In this embodiment, the adjacent terminal modules 12 are arranged in a staggered manner in the first direction, and the plurality of terminal modules are arranged in an S-shaped staggered manner in the second direction; correspondingly, the signal terminal avoiding holes 141 in two adjacent rows are also staggered in the first direction. As shown in fig. 18, in the first direction, the grounding pogo pins 142 and the signal terminal avoiding holes 141 in the same row are alternately arranged, and both outer sides in the first direction are set as grounding pogo pins; in the second direction, because two adjacent rows of differential pairs are staggered in the first direction, the contact end of each differential pair has a grounding spring pin on at least one side in the second direction. For example, the contact ends of the differential pairs in the uppermost or lowermost row each have an adjacent ground latch in the second direction, so that the contact ends of the two rows have ground latches on three sides for shielding ground. And the upper and lower sides of the contact end of each differential pair positioned in the middle row are provided with directly adjacent grounding elastic pins, so that the upper, lower, left and right sides of the contact end of the differential pair positioned in the middle row are provided with the grounding elastic pins, and the anti-crosstalk effect between the adjacent differential pairs can be improved through the design.

Furthermore, the projection of the grounding spring pin at one side of the contact end of the differential pair in the second direction is positioned in the width range of the outer side of the contact end of the corresponding differential pair; that is, in fig. 19, L1 (projection of the ground latch in the second direction) is smaller than L2 (width of the contact end of the differential pair in the first direction). By means of the structural design, in the first direction of the front end face of the cable connector, the grounding elastic pins and the differential pairs are distributed in the GSSGSSGSSG mode, and in the second direction, one side of the contact end of each differential pair is provided with at least one adjacent grounding elastic pin, so that crosstalk between the differential pairs in different terminal modules at the contact ends is effectively reduced.

In order to facilitate quick insertion of each terminal module, the receiving cavity 110 of the housing 11 includes a plurality of slots 111 arranged along the second direction, and adjacent slots 111 are staggered in the first direction by an amount less than the width of one differential pair. The two sides of the slot 111 are provided with a limiting step 1111 at a position close to the conductive plastic plate, the limiting step is provided with a guide groove 1112 extending in the front-rear direction, and correspondingly, two sides of the insulating base 121 are provided with an adaptive limiting surface 1215 in stop fit with the limiting step in the front-rear direction, and a guide rib 1216 located in front of the adaptive limiting surface and extending in the front-rear direction, and the guide rib and the guide groove are in guide fit in the front-rear direction. Further, in order to prevent the terminal modules from coming off backward, the lock 15 is used to lock each terminal module 12 in the front-rear direction. As shown in fig. 10, two lock slots 112 are symmetrically formed in two sides of the housing 11, the lock slots 112 extend in a direction perpendicular to the front-back direction, that is, the extending direction of the lock slots is parallel to the plane of the first direction and the second direction, two locks 15 are provided, each lock corresponds to one lock slot, and the lock is inserted into the slot inside the housing through the corresponding lock slot; the plugging direction of the lock catch is perpendicular to the plugging direction of the terminal module. Two sides of the insulating base 121 are respectively provided with a locking slot 1217, one surface of the latch 15 facing the housing extends to form a locking arm 151 matching with the corresponding locking slot, and the locking arm extends along the width direction (i.e. the first direction) of the terminal module. During installation, the terminal modules are inserted into corresponding slots, each terminal module can be slightly pressed towards the front end direction in order to ensure reliable contact between the shielding shell and the conductive plastic plate, under the condition that the adaptive limiting surface is abutted against the limiting step, the shielding shell is in slight interference contact with the conductive plastic plate, then the two lock catches are respectively inserted from the two sides of the shell, each lock arm 151 penetrates through the lock catch slot corresponding to the side part of the shell and then enters the lock groove 1217 of the corresponding terminal module, locking and fixing of the two sides of each terminal module are realized, and the terminal modules are prevented from moving in the front-back direction. The fixing form of the terminal module is beneficial to improving the assembly efficiency, all the terminal modules can be fixed at one time, and because an additional locking structure is not required to be arranged on the terminal module, the production cost is greatly reduced, and the structure miniaturization design of the cable connector is facilitated. Each locking arm is matched with a locking groove on one side of one terminal module, and the lengths of the adjacent locking arms on the same lock catch are different so as to adapt to the staggered installation form of the terminal modules. Further, in order to fix the lock after being inserted into the lock slot, the locking arm 151 is provided with a forced installation protrusion 152, the forced installation protrusion is distributed on two sides of the locking arm relatively, the forced installation protrusion 152 is in interference fit with the inner wall of the via hole 1121 of the lock slot 112 (as shown in fig. 15), the via hole extends along the first direction and is communicated with the slot, and the number of the via holes is the same as that of the locking arm. The two lock catches are identical in structure, can be manufactured in batches during production, and can be installed normally and installed reversely when the lock catches are inserted into the shell for locking.

In this embodiment, two adjacent terminal modules are installed one on the other side and installed on the other side, so that the bending directions of the elastic sheet structures of two adjacent rows of contact ends are opposite, unstable connection state caused by the reactive force of the same direction when the contact ends are elastically contacted with the PCB under the condition of bending towards one direction is avoided, and stable contact conduction of the cable connector and the PCB is facilitated.

In this embodiment, the PCB 2 and the cable connector 1 are connected by screws 3. The side part of the shell is internally embedded with a nut, and the screw 3 passes through the mounting hole on the PCB and then is in locking fit with the corresponding nut, so that the cable connector is locked on the surface of the PCB, and surface-mounted short-chain transmission is realized.

Embodiments of the cable connector:

the cable connector is the cable connector 1 described in the above embodiments of the high-speed cable connector assembly, and will not be described herein.

The foregoing is only a preferred embodiment of the present invention and is not detailed in the prior art; any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention will still fall within the scope of the technical solution of the present invention by those skilled in the art without departing from the technical solution of the present invention.

Claims

1. A cable connector, characterized by: the terminal module connector comprises a shell, terminal modules and a lock catch, wherein an accommodating cavity for accommodating a plurality of terminal modules is formed in the shell, each terminal module is inserted into the accommodating cavity of the shell along the front-back direction, the terminal modules are arranged in the accommodating cavity in a stacking manner along the thickness direction, lock catch slots are symmetrically formed in two sides of the outer part of the shell and are communicated with the accommodating cavity, the lock catch is inserted into the corresponding lock catch slot along the direction perpendicular to the insertion direction of the terminal modules, and the lock catch and the corresponding lock catch slot are in blocking fit in the front-back direction; the terminal module comprises an insulating base and a plurality of shielding cable assemblies arranged on the insulating base along the width direction of the terminal module, the front end of each shielding cable assembly is provided with a contact end extending out of the front end face of the shell, two sides of the insulating base are respectively provided with a locking groove, the lock catch is provided with lock arms which are in one-to-one corresponding fit with the locking grooves, and the lock arms extend along the width direction of the terminal module; when the locking structure is locked, the locking arm enters the accommodating cavity through the locking slot and is in blocking fit with the locking slot in the front-back direction.

2. The cable connector of claim 1, wherein: be equipped with on the locking arm and adorn the arch by force, the hasp slot include with accept the via hole of chamber intercommunication, the locking arm through adorn protruding and correspond the inner wall of via hole by force the assembly fit to realize that the hasp is in the location under the locking state.

3. The cable connector of claim 2, wherein: each shielding cable assembly comprises a cable, a shielding shell and a terminal, wherein the front end of the terminal is a contact end, the terminal is installed in the shielding shell through an insulator, and two terminals forming a differential pair are arranged in parallel in each insulator; the cable comprises a cable insulating layer, an inner conductor arranged in the cable insulating layer, a shielding layer arranged outside the cable insulating layer and a shielding sheet riveted on the outer side of the front end of the shielding layer, the shielding sheet is riveted with the shielding shell, and the inner conductor is connected with wiring ends at the rear ends of the terminals in a one-to-one correspondence manner;

4. The cable connector of claim 3, wherein: the shell is through from front to back, and a conductive plastic plate is fixedly arranged inside the front end of the shell;

5. The cable connector of claim 4, wherein: the conductive plastic board has set firmly the shielding otter board on the terminal surface towards the PCB board, has seted up on the shielding otter board and keeps away the hole with the corresponding signal terminal of difference pair, still is provided with the convex ground connection bullet needle to PCB board direction on the shielding otter board, and ground connection bullet needle is used for being connected with the ground structure on the PCB board.

6. The cable connector of claim 5, wherein: the signal terminal evading holes and the grounding elastic pins arranged in each row on the shielding screen plate are alternately arranged along the width direction of the corresponding terminal module.

7. The cable connector of claim 4, wherein: the accommodating cavity comprises a plurality of slots which are arranged along the stacking direction of the terminal modules, the slots are used for guiding and inserting the corresponding terminal modules, and the positions of two sides of each slot, which are close to the conductive plastic plates, are provided with limiting steps; the two sides of the insulating base are provided with adaptive limiting surfaces which are in blocking fit with the corresponding limiting steps in the forward direction; when the adaptive limiting surface is abutted against the limiting step, the locking arm on the lock catch can be inserted into the corresponding lock groove.

8. The cable connector of claim 7, wherein: the limiting step is provided with a guide groove extending in the front-back direction, two sides of the insulating base are provided with guide ribs which are located in front of the adaptive limiting surface and extend in the front-back direction, and the guide ribs are matched with the guide groove in a sliding guide mode in the front-back direction.

9. The cable connector of claim 7, wherein: the adjacent slots are arranged in a staggered manner in the width direction of the terminal module.

10. The cable connector of claim 1, wherein: the contact end of the terminal is a spring plate type contact end, and the bending directions of the contact ends in two adjacent terminal modules are opposite.