Cable Connector

Abstract

The present invention relates to a cable connector, which includes a housing, a terminal module and a latch. An accommodation cavity for accommodating the terminal module is provided inside the housing. Each terminal module is inserted into the accommodation cavity of the housing in the front-rear direction, and a plurality of terminal modules are stacked in the accommodation cavity in the thickness direction. Locking slots communicating with the accommodation cavity are symmetrically formed on both outer sides of the housing. The latch is inserted into the locking slots in a direction perpendicular to the insertion direction of the terminal module. The terminal module includes an insulating base and a plurality of shielded cable assemblies arranged on the insulating base along the width direction of the terminal module. The front end of the shielded cable assembly has a contact end. Locking grooves are respectively provided on both sides of the insulating base, and locking arms cooperating with the locking grooves are provided on the latch. When locked, the locking arms enter the accommodation cavity through the locking slots and are in blocking cooperation with the locking grooves in the front-rear direction. The cable connector of the present invention uses a latch to achieve batch assembly and positioning of the terminal module, improves the loading and unloading efficiency of the terminal module, and is conducive to the miniaturized design of the connector.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-speed cable connectors, and particularly relates to a cable connector. Background Art

[0002] In the prior art, a high-speed cable connector generally includes a plurality of terminal modules. The terminal modules are arranged in the housing of the cable connector along a certain direction. The fixing method of the terminal module is generally to set a buckle structure on the side of the terminal module and set a corresponding card slot in the housing. The independent fixing of a single terminal module is achieved through the form of buckle cooperation, and finally, a plurality of terminal modules are positioned in sequence. However, this fixing method inevitably requires corresponding buckles to be configured on the side of the terminal module. The buckle is generally an elastic buckle and requires a certain amount of swing in the width direction of the terminal module. This not only makes the processing method complex, but also occupies the space of the terminal module in its width direction, resulting in a larger overall volume and higher cost of the connector. Moreover, the elastic buckle structure is prone to breakage, resulting in fixing failure. And during assembly, each terminal module is independently locked, and tools are required to disassemble them in sequence during disassembly, so the loading and unloading efficiency needs to be improved. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention proposes a cable connector to improve the loading and unloading efficiency of the terminal module.

[0004] The purpose of the present invention and the solution to its technical problems are achieved by adopting the following technical solutions. The cable connector proposed according to the present invention includes a housing, terminal modules, and a lock. The housing has a receiving cavity for receiving a plurality of terminal modules inside. Each terminal module is inserted into the receiving cavity of the housing in the front-back direction, and a plurality of terminal modules are stacked in the thickness direction in the receiving cavity. On both sides of the outside of the housing, lock slots are symmetrically opened, and the lock slots are communicated with the receiving cavity. The lock is inserted into the corresponding lock slot in a direction perpendicular to the insertion direction of the terminal module, and the lock and the corresponding lock groove are in a blocking fit in the front-back direction; the terminal module includes an insulating base and a plurality of shielded cable assemblies arranged on the insulating base along the width direction of the terminal module. The front end of the shielded cable assembly has a contact end extending forward beyond the front end face of the housing. On both sides of the insulating base, a lock groove is provided respectively, and the lock has a lock arm corresponding to and cooperating with the lock groove. The lock arm extends along the width direction of the terminal module; when locking, the lock arm enters the receiving cavity through the lock slot and is in a blocking fit with the lock groove in the front-back direction.

[0005] Furthermore, a forced installation protrusion is provided on the lock arm. The lock slot includes a through hole communicated with the receiving cavity. The lock arm is in a forced installation fit with the inner wall of the corresponding through hole through the forced installation protrusion to achieve the positioning of the lock in the locked state.

[0006] Further, each shielded cable assembly includes a cable, a shield case, and terminals. The front end of the terminal is a contact end. The terminal is installed in the shield case through an insulator. Two terminals forming a differential pair are arranged in parallel in each insulator; the cable includes a cable insulation layer, an inner conductor arranged in the cable insulation layer, a shield layer arranged outside the cable insulation layer, and a shield piece riveted to the outside of the front end of the shield layer. The shield piece is riveted to the shield case, and the inner conductor is connected to the wiring end at the rear end of the terminal in one-to-one correspondence;

[0007] The terminal module further includes a shield buckle plate, which is buckled on the insulating base. The shield buckle plate covers all the shield cases in the same terminal module, and the shield buckle plate is in contact and conduction with each shield case.

[0008] Further, the housing penetrates through from front to back, and a conductive plastic plate is fixedly arranged inside the front end of the housing;

[0009] After the terminal module is installed in the receiving cavity of the housing, the front end faces of all the shield cases in each terminal module are in contact with the rear end face of the conductive plastic plate. Shield cavities for accommodating the contact ends of each differential pair are formed on the conductive plastic plate, and the front ends of the shield cavities are open so that the contact ends can extend forward.

[0010] Further, a shield mesh plate is fixedly arranged on the end face of the conductive plastic plate facing the PCB board. Signal terminal avoidance holes corresponding to the differential pairs are formed on the shield mesh plate. Grounding spring pins protruding towards the PCB board are also arranged on the shield mesh plate, and the grounding spring pins are used to connect with the grounding structure on the PCB board.

[0011] Further, the signal terminal avoidance holes and the grounding spring pins arranged in each row on the shield mesh plate are arranged alternately along the width direction of the corresponding terminal module.

[0012] Further, the receiving cavity includes a plurality of slots arranged along the stacking direction of the terminal modules. The slots are used for guiding and inserting the corresponding terminal modules. Limiting steps are arranged on both sides of the slots near the conductive plastic plate; Adapted limiting surfaces that are in blocking cooperation with the corresponding limiting steps in the forward direction are arranged on both sides of the insulating base; When the adapted limiting surface abuts against the limiting step, the locking arm on the lock can be inserted into the corresponding lock groove.

[0013] Further, guiding grooves extending in the front and rear directions are formed on the limiting steps, and guiding ribs extending in the front and rear directions and located in front of the adapted limiting surfaces are arranged on both sides of the insulating base. The guiding ribs and the guiding grooves are in sliding guiding cooperation in the front and rear directions.

[0014] Further, adjacent slots are arranged in a staggered manner in the width direction of the terminal module.

[0015] Further, the contact end of the terminal is a leaf spring type contact end, and the bending directions of the contact ends in adjacent two terminal modules are opposite.

[0016] With the above technical solution, the cable connector of the present invention uses a buckle to achieve the fixed assembly of multiple terminal modules, and the insertion and extraction direction of the buckle is perpendicular to the loading and unloading direction of the terminal module, with high locking strength; through the buckle, the present invention can lock multiple terminal modules in batches, avoiding the setting of locking structures on the terminal modules, reducing the production cost, which is not only conducive to the miniaturization design of the terminal module, but also conducive to improving the loading and unloading efficiency of the cable connector.

[0017] The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the drawings, is described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic perspective view of the cable connector in the present invention.

[0019] Figure 2 is a schematic perspective view of the high-speed cable connector assembly in the present invention.

[0020] Figure 3 is a perspective view of the terminal module in the present invention.

[0021] Figure 4 is an exploded view of the terminal module in the present invention.

[0022] Figure 5 is an exploded view of the terminal module without the injection molding body in the present invention.

[0023] Figure 6 is a schematic connection diagram of the cable and the shielding shell in the present invention.

[0024] Figure 7 is a schematic diagram showing the elastic contact conduction between the contact end of the differential pair and the PCB board in the present invention.

[0025] Figure 8 is a schematic front-end structure diagram of the cable in the present invention.

[0026] Figures 9A to 9B is a structural diagram of the shielding sheet in the present invention.

[0027] Figure 10 is an exploded view of the buckle and the housing in the present invention.

[0028] Figure 11 is a schematic diagram showing the structural cooperation relationship among the buckle, the housing, the conductive plastic plate and the terminal module in the present invention.

[0029] Figure 12 is a perspective view of the buckle in the present invention.

[0030] Figure 13 is the perspective view of the housing in the present invention.

[0031] Figure 14 is the schematic diagram of the cooperation relationship between the latch and the terminal module in the present invention.

[0032] Figure 15 is the cross-sectional schematic diagram of the cooperation between the latch and the terminal module when the latch is inserted to the locking position.

[0033] Figure 16 is Figure 15 the enlarged view of part A in

[0034] Figure 17 is the schematic diagram of the shielding mesh plate in the present invention.

[0035] Figure 18 is the bottom view of the cable connector in the present invention.

[0036] Figure 19 is the schematic diagram of the positional relationship between the contact end of the differential pair and the ground spring pins of the adjacent row in the second direction in the present invention. Detailed Embodiment

[0037] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments.

[0038] For an embodiment of a high-speed cable connector assembly, please refer to Figures 1 to 18 , which includes a cable connector 1 and a PCB board 2. The end where the cable connector is connected to the PCB board is defined as the front end.

[0039] The cable connector 1 includes a housing 11 and a plurality of terminal modules 12. The plurality of terminal modules 12 are arranged in the receiving cavity 110 of the housing 11 along the first direction, and the terminal modules are inserted forward into the receiving cavity of the housing in an insertion form along the front-rear direction. Each terminal module 12 includes an insulating base 121, a shielding buckle plate 122, and a plurality of shielding cable assemblies 123 arranged in the insulating base along the second direction; in this embodiment, each insulating base 121 is provided with an installation groove 1211 for accommodating the corresponding shielding cable assembly, and four installation grooves are arranged at intervals along the second direction. The first direction and the second direction are perpendicular to each other, and the plane where the first direction and the second direction are located is parallel to the plane where the PCB board is located; the first direction is the width direction of the terminal module, and the second direction is the thickness direction of the terminal module. Therefore, the terminal modules are arranged in a stacked manner in the housing in the thickness direction.

[0040] The shielded cable assembly 123 includes a cable 1231, a shielding shell 1232, a terminal 1233 and an insulator 1234, wherein the terminal 1233 is fixed in the insulator 1234; the terminal is specifically connected to the insulator in the form of an insert by integral injection molding, and two terminals 1233 are arranged in parallel and at intervals in each insulator. The two terminals form a differential pair 1230 for transmitting high-speed signals, and the differential pair is positioned in a corresponding shielding shell 1232 through the insulator. Shielding shell 1232 is a U-shaped sheet structure with open front, rear, and top sections, forming a U-shaped cavity. In this embodiment, positioning slots 12321 are defined on both sides of shielding shell 1232, and positioning protrusions 12341 are provided on the sides of insulator 1234 to engage with the positioning slots. Furthermore, the positioning protrusions of adjacent insulators within the same terminal module are interconnected to form connecting arms 12342, which snap into position within positioning slots 12321. This allows multiple insulators within a terminal module to form a single, integrated insulator, facilitating batch installation of shielded cable assemblies and ensuring consistent front-to-back distances between each differential pair, particularly improving the coplanarity of the ends of all differential pairs mating with the PCB. Terminal 1233, from front to back, comprises a contact end 12331, a fixed section, and a terminal 12332. The fixed section is embedded within the insulator, while the contact end protrudes from the front of the shielding shell. In this embodiment, the contact end adopts a spring-type contact end, and the contact end is a C-shaped spring. The present invention adopts this LGA spring structure to achieve elastic contact and conduction with the PCB board, which not only has stronger connection reliability and can adapt to complex working conditions, but also has a convenient connection and conduction form.

[0041] Cable 1231 includes a shielding sheet 12311, a shielding layer 12312, a cable insulation layer 12313, and inner conductors 12314 disposed within the cable insulation layer. The inner conductors are arranged in pairs, corresponding one-to-one with the two contact ends of the differential pair. The cable insulation layer is integrally molded in one piece, which facilitates cable stability control and enables complex processes such as foaming. The cable insulation layer and the inner conductor are integrally injection molded to achieve relative fixation. The inner conductor is stably fixed within the cable insulation layer as an insert, preventing the paired inner conductors from moving relative to each other and affecting high-speed performance. A shielding layer 12312 is provided on the outside of the cable insulation layer; the shielding sheet 12311 is riveted to the front end of the shielding layer 12312. In this embodiment, the cross-section of the cable insulation layer is elliptical, so that the two inner conductors can be spaced apart within it along the long axis of the ellipse. The inner conductor passes through the cable insulation layer from the front end of the cable, and the inner conductor 12314 is welded to the terminal terminal 12332 in a one-to-one correspondence. After welding, UV glue 12315 is applied to the welding position, and the UV glue is cured to achieve sealing protection.

[0042] Combine Figure 9A 、 Figure 9B, the shielding sheet 12311 includes a shielding sheet main body portion 123111 extending forward and backward. The front ends of the shielding sheet main body portion extend and bend towards both sides respectively to form a pair of riveting main body portions 123112. The riveting main body portions are in an arc-shaped sheet structure and are used for contact and cooperation with the outer surface of the shielding layer. The riveting main body portions are the parts of the entire shielding sheet responsible for large-area contact with the shielding layer and are used to ensure the stability of shielding conduction. The rear ends of the shielding sheet main body portion extend and bend towards both sides respectively to form a pair of riveting branch portions 123113. The riveting branch portions are used to hoop the shielding layer 12312 and are the parts of the entire shielding sheet responsible for fixing. There is a gap 123114 between the riveting main body portion and the riveting branch portion, that is, they are arranged at intervals, which is convenient for independent riveting during the riveting process and prevents mutual influence. Through comparison, it can be seen that after the shielding sheet is riveted, the radial distance of the movable ends of the two riveting branch portions is larger than that of the movable ends of the two riveting main body portions. On the one hand, it ensures the contact area between the riveting main body portion and the shielding layer, and on the other hand, it ensures that the riveting branch portions have a strong riveting effect. Of course, the riveting main body portion can also play a certain degree of riveting and fixing role, and the riveting branch portion can also play a certain degree of shielding conduction role.

[0043] The shielding shell 1232 and the shielding sheet 12311 are riveted and fixed. In this embodiment, first riveting claws 12321 are symmetrically arranged on both sides of the rear end of the shielding shell 1232. The first riveting claws are used for riveting the outer wall of the riveting main body portion of the shielding sheet. In order to strengthen the riveting and fixing property between the high-speed cable and the shielding shell and increase the number of contact points at the same time, second riveting claws 12322 are also symmetrically arranged at the rear end of the shielding shell. The second riveting claws are formed by the rear end surface of the shielding shell extending and bending backward. The second riveting claws are riveted and cooperated with the riveting branch portions. The first riveting claws are formed by the rear end surface of the shielding shell extending and bending towards the inside of the shielding shell on the end surface facing the shielding buckle plate 122 (that is, the upper end surface). After the cable is fixed, the bottom of the shielding sheet 12311 contacts the bottom surface of the inner wall of the shielding shell. In order to ensure a large-area surface contact, the movable end of the riveting main body portion is set as a plane; after the shielding shell and the cable are riveted and relatively positioned, the shielding shell realizes a three-sided surrounding shielding of the cable. After the shielded cable assembly is arranged in the installation 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 contacts the upper end surface of each shielding shell 1232, thereby realizing a full-surround shielding of the connection between the cable and the terminal and making the shielding shells in the same terminal module share the ground. In this embodiment, fixing holes 1221 are provided on the shielding buckle plate 122, and fixing bumps 1212 that are strongly fitted with the fixing holes are provided on the insulating base 121 to realize the installation positioning of the shielding buckle plate and the reliable contact with the shielding shell. To improve the connection reliability between the shielding shell and the shielding buckle plate, laser welding technology can also be further used to weld the contact part between the upper end surface of the shielding shell and the shielding buckle plate.

[0044] An injection molded body 124 is provided at the rear end of the insulating base 121, and the injection molded body 124 is integrally connected to the insulating base 121, and is used to plastic-seal and fix the tail of the shielded cable assembly. The injection molded body wraps the front end of the cable and accommodates the shielding sheet inside it. The injection molded body fixes the insulating base and the front end of the cables arranged in a row as a whole, thereby realizing the assembly and positioning of the shielded cable assembly. In addition, a through groove 1214 is provided on the rib 1213 between adjacent mounting grooves on the insulating base 121, and the connecting arm 12342 between adjacent insulators falls into the through groove 1214. The two are blocked and matched in the front-to-back direction, and the assembly and positioning of the shielded cable assembly in the front-to-back direction can also be realized.

[0045] The housing 11 is continuous from front to back. A conductive plastic plate 13 is fixed to the front of the housing 11. This plate is rigidly fitted to the housing. When multiple terminal modules 12 are installed within the housing 11, the front surfaces of all shielding shells 1232 within each terminal module contact this plate 13, thereby achieving a common ground for all shielding shells. The plate 13 defines a shielding cavity 131 that accommodates the contact terminals of each differential pair. This cavity 131 is open at the front, providing shielding isolation between the differential pairs and reducing crosstalk. A shielding mesh plate 14 is fixedly provided on the end surface of the conductive plastic plate 13 facing the PCB board. The shielding mesh plate 14 is provided with multiple snap-in protrusions (not shown in the figure), and the conductive plastic plate 13 is provided with corresponding snap-in recesses (not shown in the figure). The snap-in protrusions and the snap-in recesses are strongly fitted together to achieve a fixed connection and stable contact and conduction between the shielding mesh plate and the conductive plastic plate; that is, the fixing form of the shielding mesh plate and the conductive plastic plate is similar to that of the shielding buckle plate and the insulator seat, but the snap-in protrusions should be on the outside of the shielding mesh plate near the edge.

[0046] The shielding mesh 14 is provided with signal terminal holes 141 corresponding to the differential pairs 1230. This allows the contacts of each differential pair to pass through the corresponding signal terminal holes and electrically connect to the PCB after the shielding mesh is installed on the front face of the cable connector. The shielding mesh 14 is also provided with grounding springs 142 that protrude toward the PCB and are used to connect to the grounding structure on the PCB. This invention utilizes the grounding springs to bridge the gap between the shielding mesh and the PCB, enhancing the shielding effect.

[0047] In this embodiment, adjacent terminal modules 12 are staggered in the first direction, and multiple terminal modules are arranged in an S-shaped staggered arrangement in the second direction; correspondingly, the signal terminal avoidance holes 141 in two adjacent rows are also staggered in the first direction. Figure 18, in the first direction, the ground spring pins 142 and the signal terminal avoidance holes 141 in the same row are arranged alternately, and the two outer sides in the first direction are both set as ground spring pins; in the second direction, since the adjacent two rows of differential pairs are misaligned in the first direction, so that the contact ends of each differential pair have ground spring pins on at least one side in the second direction. For example, the contact ends of the differential pairs in the topmost or bottommost row both have an adjacent ground spring pin in the second direction, so the three sides of the contact ends of these two rows of differential pairs have ground spring pins for shielding grounding. And the upper and lower sides of the contact end of each differential pair in the middle row both have directly adjacent ground spring pins, so the upper, lower, left and right four sides of the contact ends of the differential pairs in the middle row all have ground spring pins. Through the above design, the crosstalk resistance effect between adjacent rows of differential pairs can be improved.

[0048] Further, the projection of the ground spring pin on one side of the contact end of the differential pair in the second direction is located within the outer width range of the contact end of the corresponding differential pair; that is Figure 19 in, L1 (the projection of the ground spring pin in the second direction) is less than L2 (the width of the contact end of the differential pair in the first direction). By means of the above structural design, in the first direction on the front end face of the cable connector, the ground spring pins and the differential pairs are distributed in the form of GSSGSSGSSG, and in the second direction, there is at least one adjacent ground spring pin on one side of the contact end of each differential pair, thereby effectively reducing the crosstalk between the differential pairs in different terminal modules at the contact end.

[0049] For the convenience of the quick insertion of each terminal module, the receiving cavity 110 of the housing 11 includes a plurality of slots 111 arranged in the second direction, and the adjacent slots 111 are misaligned in the first direction, and the misalignment amount is less than the width of a differential pair. Limiting steps 1111 are provided at positions close to the conductive plastic plate on both sides of the slot 111, and guiding grooves 1112 extending in the front and rear directions are provided on the limiting steps. Correspondingly, on both sides of the insulating base 121, there are adapted limiting surfaces 1215 that are in blocking cooperation with the limiting steps in the forward direction, and guiding ribs 1216 that are located in front of the adapted limiting surfaces and extend in the front and rear directions. The guiding ribs and the guiding grooves are in guiding cooperation in the front and rear directions. Further, in order to prevent the terminal module from slipping out backward, a buckle 15 is used to lock each terminal module 12 in the front and rear directions. Such as Figure 10, on both sides of the housing 11, there are symmetrically arranged latch slots 112. The latch slots 112 are extended and arranged perpendicular to the front-back direction, that is, the extension direction of the latch slots is parallel to the plane where the first and second directions are located. There are two latches 15, and each latch corresponds to a latch slot. The latch is inserted into the slot inside the housing through the corresponding latch slot; the insertion and extraction direction of the latch is perpendicular to the insertion direction of the terminal module. On both sides of the insulating base 121, there is respectively provided a locking groove 1217. On the side of the latch 15 facing the housing, there extends a locking arm 151 that cooperates with the corresponding locking groove. The locking arm extends along the width direction of the terminal module (i.e., the first direction). During installation, insert the terminal module into the corresponding slot. To ensure reliable contact between the shielding case and the conductive plastic plate, each terminal module can be slightly pressed in the front-end direction. When the fitting limiting surface abuts against the limiting step, the shielding case and the conductive plastic plate are in a slightly interference contact. Then, insert the two latches from both sides of the housing respectively, so that each locking arm 151 passes through the corresponding latch slot on the side of the housing and enters the locking groove 1217 of the corresponding terminal module, realizing the locking and fixing of both sides of each terminal module and preventing the terminal module from moving in the front-back direction. This form of fixing the terminal module is conducive to improving the assembly efficiency, and all terminal modules can be fixed at one time. Moreover, since there is no need to set an additional locking structure on the terminal module, the production cost is greatly reduced, and it is conducive to the miniaturized design of the structure of the cable connector. Each locking arm cooperates with the locking groove on one side of a terminal module, and the adjacent locking arms on the same latch have different lengths to adapt to the misaligned installation form of the terminal module. Further, in order to realize the fixing after the latch is inserted into the latch slot, there are forced installation protrusions 152 on the locking arm 151. The forced installation protrusions are distributed relatively on both sides of the locking arm. The forced installation protrusions 152 and the inner wall of the through hole 1121 of the latch slot 112 are in interference fit (such as Figure 15 ), the through hole extends along the first direction and is communicated with the slot, and the number of through holes is the same as the number of locking arms. The two latches have the same structure and can be mass-produced during production. When inserted into the housing for locking, one is installed normally and the other is installed reversely.

[0050] In this embodiment, two adjacent terminal modules are installed one normally and one reversely, so that the bending directions of the elastic sheet structures of the contact ends in two adjacent rows are opposite, avoiding the unstable connection state caused by the elastic contact with the PCB board when the contact ends are bent in the same direction and receiving the reaction force in the same direction, thereby facilitating the stable contact conduction between the cable connector and the PCB board.

[0051] In this embodiment, the PCB board 2 and the cable connector 1 are connected by screws 3. There are nuts embedded in the side part of the housing. The screws 3 pass through the mounting holes on the PCB board and are locked and cooperated with the corresponding nuts, so that the cable connector is locked on the surface of the PCB board, realizing surface-mounted short-link transmission.

[0052] Embodiment of the cable connector:

[0053] The cable connector is the cable connector 1 described in the above embodiments of the high-speed cable connector assembly, and details are not repeated here.

[0054] The above are only the preferred embodiments of the present invention, and the details not described are all prior arts; any person skilled in the art, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A cable connector, characterized in that: The present invention comprises a shell, a terminal module and a lock, wherein the shell has an accommodating cavity for accommodating a plurality of terminal modules, each terminal module is inserted into the accommodating cavity of the shell along the front-to-back direction, and the plurality of terminal modules are stacked in the accommodating cavity along the thickness direction, and lock slots are symmetrically provided on both sides of the exterior of the shell, the lock slots are connected with the accommodating cavity, the lock is inserted into the corresponding lock slot along the insertion direction perpendicular to the terminal module, and the lock is blocked and matched with the corresponding lock slot in the front-to-back direction; the terminal module comprises an insulating base and a plurality of shielded cable assemblies arranged on the insulating base along the width direction of the terminal module, the front end of the shielded cable assembly has a contact end extending from the front end surface of the shell, a lock slot is provided on both sides of the insulating base, and a locking arm corresponding to the lock slot is provided on the lock, and the locking arm extends along the width direction of the terminal module; when locked, the locking arm enters the accommodating cavity through the lock slot and blocks and matches with the lock slot in the front-to-back direction; Each shielded cable assembly includes 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. Two terminals constituting a differential pair are arranged in parallel in each insulator. The cable includes a cable insulation layer, an inner conductor arranged in the cable insulation layer, a shielding layer arranged outside the cable insulation layer, and a shielding sheet riveted to the outer side of the front end of the shielding layer. The shielding sheet is riveted to the shielding shell, and the inner conductor is connected to the terminal at the rear end of the terminal in a one-to-one correspondence. The terminal module also includes a shielding buckle plate, which is buckled on the insulating base and covers all shielding shells in the same terminal module. The shielding buckle plate is in contact and conductive with each shielding shell.

2. The cable connector according to claim 1, wherein: A forced mounting protrusion is provided on the locking arm, and the lock buckle slot includes a through hole connected to the receiving cavity. The locking arm is forcedly matched with the inner wall of the corresponding through hole through the forced mounting protrusion to achieve positioning of the lock buckle in a locked state.

3. The cable connector according to claim 1, wherein: The shell is through-connected from front to back, and a conductive plastic plate is fixed inside the front end of the shell; After the terminal module is installed in the receiving cavity of the shell, the front end faces of all shielding shells in each terminal module are in contact with the rear end face of the conductive plastic plate. A shielding cavity is provided on the conductive plastic plate to accommodate the contact ends of each differential pair. The front end of the shielding cavity is open so that the contact ends can extend forward.

4. The cable connector according to claim 3, wherein: A shielding mesh is fixed on the end surface of the conductive plastic board facing the PCB board. The shielding mesh is provided with signal terminal avoidance holes corresponding to the differential pairs. The shielding mesh is also provided with grounding spring pins protruding toward the PCB board. The grounding spring pins are used to connect to the grounding structure on the PCB board.

5. The cable connector according to claim 4, wherein: The signal terminal avoidance holes and grounding spring pins arranged in each row on the shielding mesh are alternately arranged along the width direction of the corresponding terminal module.

6. The cable connector according to claim 3, wherein: The accommodating cavity includes several slots arranged along the stacking direction of the terminal modules. The slots are used to guide the corresponding terminal modules for insertion. Limiting steps are provided on both sides of the slots near the conductive plastic plate; matching limiting surfaces are provided on both sides of the insulating base to block and cooperate with the corresponding limiting steps in the forward direction; when the matching limiting surfaces abut against the limiting steps, the locking arm on the lock can be inserted into the corresponding lock slot.

7. The cable connector according to claim 6, wherein: A guide groove extending in the front-to-back direction is provided on the limiting step, and guide ribs located in front of the adaptation limiting surface and extending in the front-to-back direction are provided on both sides of the insulating base. The guide ribs and the guide grooves slide and guide in the front-to-back direction.

8. The cable connector according to claim 6, wherein: Adjacent slots are staggered in the width direction of the terminal module.

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

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