Shielding shield, terminal module and connector

Abstract

The utility model relates to the technical field of electric connectors, in particular to a shielding protective cover, a terminal module and a connector, the shielding protective cover comprises a protective cover main body and a contact piece which are formed in a split mode, and the protective cover main body is provided with a protective cover inner cavity used for shielding a plugging end of a signal terminal of the connector. The shield main body is provided with a contact sheet, the contact sheet is provided with a fixed part and a contact part, the fixed part is fixedly connected to the outer wall of the shield main body, and the contact part is used for being in top pressure contact with a shielding structure of an adaptive connector. The shield inner cavity for shielding the plugging end of the signal terminal of the connector is formed by utilizing the shield main body, the contact piece is additionally and fixedly connected to the outer wall of the shield main body so as to be in jacking contact with a shielding structure of an adaptive connector, and a shielding gap does not need to be reserved on the shield main body for integrally forming the contact piece, so that the shielding effect is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connectors, and particularly relates to a shielding cover, a terminal module and a connector. Background Art

[0002] High-speed differential backplane connectors are often used for high-speed interconnection between the backplane and the daughter board to achieve the complete transmission of high-speed signals. With the continuous improvement of the transmission rate of high-speed signals, the shielding requirements for connectors are also getting higher and higher. An existing high-speed connector, such as a plug assembly disclosed in the Chinese invention patent application with the publication number CN114079172A, in which a plurality of contact modules are installed in the plug housing. The contact module includes a plurality of signal contacts. The signal contact has a mating portion for mating with the socket assembly. The mating portion is a pin structure. The contact module is also provided with a shielding structure for providing electrical shielding for the signal contacts. The shielding structure includes a ground shielding member. The ground shielding member includes a ground shield extending forward from the front portion of its body. The ground shield provides electrical shielding for the mating portion of the signal contact and includes a shield wall forming a shield cavity. The shield wall includes a first end wall and a second end wall arranged oppositely and a central wall connecting the two side end walls. The shield wall forms a C-shaped cover body. The mating portion of the signal contact extends into the shield inner cavity and is inserted into the corresponding jack contact of the socket assembly in the shield inner cavity to surround and shield the insertion area by using the ground shield. The front end of the ground shield is provided with a joint finger for contacting the shielding structure of the socket assembly. The joint finger is a bendable spring beam, that is, a spring piece. The end of the spring piece is bent and protrudes from the outer wall surface of the ground shield. The shielding structure of the socket assembly is provided with a shielding cavity for inserting the front end of the ground shield. The end of the spring piece forms an elastic pressing contact with the inner wall of the shielding cavity to make the plug assembly and the socket assembly shield-conductive.

[0003] The above contact module constitutes a terminal module, the ground shield constitutes a shielding cover, and the mating portion of the signal contact constitutes the insertion portion of the signal terminal. The spring piece on the side wall of the shielding cover is integrally processed by a piercing process. When making the spring piece, a part of the material around the part of the sheet material for forming the spring piece needs to be removed, and then the part for forming the spring piece is bent to form the spring piece. In this way, a process groove is formed around the spring piece, so that a shielding gap is formed in the shielding cover at the process groove, reducing the crosstalk shielding ability of the shielding cover. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a shielding cover to solve the problem that the shielding effect is affected due to the formation of a shielding gap at the contact spring piece for realizing shielding conduction in the shielding cover of the current connector; the purpose of the utility model is also to provide a terminal module and a connector to solve the above problems.

[0005] The technical solution of the shielding cover of the utility model is:

[0006] A shielding cover includes a separately formed cover body and a contact piece. The cover body has a cover inner cavity for shielding the insertion end of the signal terminal of the connector, and the contact piece has a fixing portion fixedly connected to the outer wall of the cover body and a contact portion for pressing against and contacting the shielding structure of the mating connector.

[0007] Further, a groove is provided on the outer wall of the cover body, and the fixing portion of the contact piece is fixed in the groove.

[0008] Further, the contact piece is a contact elastic piece, the extending direction of the groove is the same as the length direction of the contact elastic piece, the end of the contact elastic piece is a bent structure, the contact portion is arranged at the end of the contact elastic piece, a countersunk hole is provided at the end of the groove, and the edge of the end of the contact elastic piece extends into the countersunk hole.

[0009] Further, the end of the contact elastic piece is a bent structure, the contact portion is arranged at the end of the contact elastic piece, and the edge of the end of the contact elastic piece extends to the inner side of the outer wall surface of the cover body close to the cover inner cavity.

[0010] Further, a countersunk hole is provided on the cover body, and the edge of the end of the contact elastic piece extends into the countersunk hole.

[0011] Further, a convex bump is provided on the contact piece, and the convex bump forms the contact portion.

[0012] Further, the cover body is a cylindrical structure.

[0013] The beneficial effects of the shielding cover of the present utility model: On the basis of the shielding cover of the connector in the prior art, the present utility model makes element changes, separately forms the cover body and the contact piece, uses the cover body to form a cover inner cavity for shielding the insertion end of the signal terminal of the connector, and the contact piece is fixedly connected to the outer wall of the cover body separately to press against and contact the shielding structure of the mating connector. There is no need to leave a shielding notch on the cover body for integrally forming the contact piece, which is beneficial to ensuring the shielding effect.

[0014] The technical solution of the terminal module of the present utility model is

[0015] A terminal module includes an insulator and signal terminals fixed on the insulator, and further includes a shielding cover. The shielding cover includes a separately formed cover body and a contact piece. The cover body has a cover inner cavity for shielding the insertion end of the signal terminal of the connector, and the contact piece has a fixing portion fixedly connected to the outer wall of the cover body and a contact portion for pressing against and contacting the shielding structure of the mating connector.

[0016] Further, a groove is provided on the outer wall of the cover body, and the fixing portion of the contact piece is fixed in the groove.

[0017] Further, the contact piece is a contact elastic piece, the extending direction of the groove is consistent with the length direction of the contact elastic piece, the end of the contact elastic piece is a bent structure, the contact portion is arranged at the end of the contact elastic piece, a countersunk hole is provided at the end of the groove, and the edge of the end of the contact elastic piece extends into the countersunk hole.

[0018] Further, the end of the contact elastic piece is a bent structure, the contact portion is arranged at the end of the contact elastic piece, and the edge of the end of the contact elastic piece extends to the inner side close to the inner cavity of the shield body on the outer wall surface of the shield body.

[0019] Further, a countersunk hole is provided on the shield body, and the edge of the end of the contact elastic piece extends into the countersunk hole.

[0020] Further, a convex bump is provided on the contact piece, and the convex bump forms the contact portion.

[0021] Further, the shield body is of a cylindrical structure.

[0022] Further, shielding sheets are provided on at least one side in the thickness direction of the insulator, and the shielding shield and the shielding sheets are separately arranged and in conductive contact.

[0023] Further, a connecting groove for the end of the side wall of the shielding shield to be snapped into is provided on the shielding sheet, a pressing convex portion for pressing and cooperating with the shielding shield is provided on the inner wall of the connecting groove, and a deformation avoiding hole for the elastic deformation of the pressing convex portion is provided on the shielding sheet on the side opposite to the connecting groove of the pressing convex portion.

[0024] The beneficial effects of the terminal module of the present utility model: On the basis of the shielding shield of the terminal module of the connector in the prior art, the present utility model makes element changes, integrally forms the shield body and the contact piece separately, forms a shield inner cavity for shielding the insertion end of the signal terminal of the connector by using the shield body, and the contact piece is fixedly connected to the outer wall of the shield body and presses against and contacts the shielding structure of the mating connector. There is no need to leave a shielding notch on the shield body for integrally forming the contact piece, which is beneficial to ensuring the shielding effect.

[0025] The technical solution of the connector of the present utility model is

[0026] A connector includes a terminal module, the terminal module includes an insulator and signal terminals fixed on the insulator, the terminal module further includes a shielding shield, the shielding shield includes a separately formed shield body and a contact piece, the shield body has a shield inner cavity for shielding the insertion end of the signal terminal of the connector, and the contact piece has a fixing portion fixedly connected to the outer wall of the shield body and a contact portion for pressing against and contacting the shielding structure of the mating connector.

[0027] Further, a groove is provided on the outer wall of the shield body, and the fixing portion of the contact piece is fixed in the groove.

[0028] Further, the contact piece is a contact elastic piece, the extending direction of the groove is consistent with the length direction of the contact elastic piece, the end of the contact elastic piece is a bent structure, the contact part is arranged at the end of the contact elastic piece, a countersunk hole is arranged at the end of the groove, and the edge of the end of the contact elastic piece extends into the countersunk hole.

[0029] Further, the end of the contact elastic piece is a bent structure, the contact part is arranged at the end of the contact elastic piece, and the edge of the end of the contact elastic piece extends to the inner side close to the inner cavity of the shield body on the outer wall surface of the shield body.

[0030] Further, a countersunk hole is arranged on the shield body, and the edge of the end of the contact elastic piece extends into the countersunk hole.

[0031] Further, a convex bump is arranged on the contact piece, and the convex bump forms the contact part.

[0032] Further, the shield body is of a cylindrical structure.

[0033] Further, shielding sheets are arranged on at least one side in the thickness direction of the insulator, and the shielding shield and the shielding sheets are separately arranged and conductively contacted.

[0034] Further, a connecting groove for the end of the side wall of the shielding shield to be inserted into is arranged on the shielding sheet, a pressing convex part for pressing and matching with the shielding shield is arranged on the inner wall of the connecting groove, and a deformation avoiding hole for the elastic deformation of the pressing convex part is arranged on the shielding sheet on the side opposite to the connecting groove of the pressing convex part.

[0035] The beneficial effects of the connector of the present utility model: On the basis of the shielding shield of the connector in the prior art, the present utility model changes elements, integrally forms the shield body and the contact piece separately, forms a shield inner cavity for shielding the insertion end of the signal terminal of the connector by using the shield body, and the contact piece is fixedly connected to the outer wall of the shield body to press and contact with the shielding structure of the adapter connector. There is no need to leave a shielding notch on the shield body for integrally forming the contact piece, which is beneficial to ensuring the shielding effect. Description of the Drawings

[0036] Figure 1 Schematic diagram of the separated states of the components of Embodiment 1 of the connector of the present utility model;

[0037] Figure 2 is Figure 1 the schematic diagram of the terminal module in

[0038] Figure 3 is Figure 2 the exploded view of the terminal module in

[0039] Figure 4 is Figure 3 the schematic diagram of the structure of the signal terminal in

[0040] Figure 5 Schematic diagram when the shielding piece of the terminal module in Figure 2 is separated from the shielding cover;

[0041] Figure 6 is Figure 5 schematic diagram of the shielding cover in

[0042] Figure 7 is Figure 6 exploded view of the shielding cover in

[0043] Figure 8 is Figure 6 partial enlarged view at C in

[0044] Figure 9 is Figure 5 partial enlarged view at B in

[0045] Figure 10 is Figure 4 partial enlarged view at A in

[0046] Figure 11 schematic diagram of the shielding cover of Embodiment 2 of the connector of the present utility model;

[0047] Figure 12 is Figure 11 partial enlarged view at D in

[0048] In the figure: 100, terminal module; 200, inner shielding shell; 300, fixed outer shell; 400, fixing piece; 500, conductive buckle plate; 1, insulator; 11, hot riveting post; 2, signal terminal; 21, plug-in end; 22, crimping end; 23, bending part; 3, first shielding piece; 4, second shielding piece; 5, shielding cover; 50, cover body; 51, U-shaped part; 52, cylindrical part; 53, conducting convex part; 54, contact piece; 541, contact part; 542, fixing part; 55, groove; 56, counterbore; 6, connecting groove; 7, deformation avoidance hole; 8, pressing convex part. Detailed implementation manners

[0049] For the connector of the present utility model, the cover body of the shielding cover and the contact elastic piece are integrally formed separately. The cover cavity for shielding the plug-in end of the signal terminal of the connector is formed by the cover body, and the contact elastic piece is fixedly connected to the outer wall of the cover body to elastically press and contact the shielding structure of the adapter connector. There is no need to leave a shielding notch on the cover body for integrally forming the contact elastic piece, which is beneficial to ensuring the shielding effect.

[0050] Embodiment 1 of the connector of the present utility model:

[0051] As Figure 1 , Figure 2 ,Figure 3 , Figure 4 As shown in Figure 4 , the connector includes a terminal module 100, a shielding inner shell 200, a fixing outer shell 300, a fixing piece 400, and a conductive pressing plate 500. A plurality of terminal modules 100 are arranged side by side, and each terminal module 100 is installed on the fixing outer shell 300 and fixed together with the fixing piece 400. The terminal module 100 includes an insulator 1, signal terminals 2, a first shielding piece 3, a second shielding piece 4, and a shielding cover 5. The signal terminals 2 and the insulator 1 are fixed together by injection molding. The signal terminals 2 are arranged in pairs to form differential pairs. A plurality of differential pairs are arranged side by side. The differential pairs are used to transmit high-speed differential signals. The signal terminals 2 are wiring terminals. The two ends of the signal terminals 2 in the length direction are respectively a plug-in end 21 and a crimping end 22. Both the plug-in end 21 and the crimping end 22 extend out of the insulator 1. The plug-in end 21 is provided with a pin structure and is used for plugging with the contact of the mating connector to achieve signal conduction. The crimping end 22 of the signal terminal 2 is provided with a fish-eye structure and is used for crimping a printed circuit board.

[0052] The first shielding piece 3 and the second shielding piece 4 are respectively fixed on both sides of the insulator 1 in the thickness direction. One end of the two shielding pieces close to the crimping end 22 of the signal terminal 2 is provided with a grounding fish-eye. The grounding fish-eye is used for crimping the grounding conductor on the printed circuit board. One end of each terminal module 100 of the connector with a fish-eye is installed with a conductive pressing plate 500. The conductive pressing plate 500 can be used to make the grounding fish-eye parts of the shielding pieces of each terminal module 100 common ground, ensuring the shielding effect.

[0053] At the plug-in end 21 of the signal terminal 2, shielding is carried out through the shielding cover 5. The shielding cover 5 has a shield cavity for shielding the plug-in end 21 of the signal terminal 2 of the connector. Each differential pair corresponds to a shielding cover 5. The plug-in ends 21 of the two signal terminals 2 of the differential pair extend into the shield cavity of the shielding cover 5. One end of the shielding cover 5 is connected to the first shielding piece 3 and the second shielding piece 4 of the same terminal module 100, and the other end is used for inserting into the shielding cavity of the mating connector. The connector in this embodiment is a male connector, and the corresponding mating connector is a female connector. The shielding structure of the female connector includes a shielding shell. The shielding shell is provided with shielding cavities corresponding to the shielding covers 5 one by one. The shielding cavities are provided with corresponding female contacts. When the male connector is plugged into the female connector, the shielding cover 5 is inserted into the corresponding shielding cavity and is in conductive contact with its cavity wall to form shielding conduction, and the signal terminal 2 of the male connector is inserted into the female contact of the female connector to form signal conduction.

[0054] As Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, the shielding cover 5 includes a cover body 50 formed by separate molding and a contact piece 54. The cover body 50 and the contact piece 54 are separate parts and are formed separately. They are fixed together by welding to form the shielding cover 5. The inner cavity of the cover body 50 forms the inner cavity of the shielding cover 5. The contact piece 54 is fixed on the outer wall of the cover body 50 and is used to contact the wall of the shielding cavity of the female terminal connector. The contact piece 54 has a fixing portion 542 fixed to the outer wall of the cover body 50 and a contact portion 541 for pressing contact with the shielding structure of the female terminal connector. By forming the cover body 50 and the contact piece 54 separately, there is no need to leave a shielding notch on the cover body 50 for integrally forming the contact piece 54, which is beneficial to ensuring the shielding effect.

[0055] The cover body 50 includes two side walls spaced opposite to each other and a connecting wall connecting the two side walls. Wherein, on the parts of the two side walls of the cover body 50 close to the first shielding piece 3 and the second shielding piece 4, there are relatively bent portions. One end of the bent portions on the two side walls is connected to the end of the side wall far from the connecting wall, and the other ends are riveted to form a cylindrical portion 52 of the cover body 50. The parts of the two side walls far from the first shielding piece 3 and the second shielding piece 4 are open towards one side to form a U-shaped portion 51 of the cover body 50. The cylindrical portion 52 of the cover body 50 is connected to the first shielding piece 3 and the second shielding piece 4. The U-shaped portion 51 is arranged on the side of the cylindrical portion 52 far from the shielding piece. The cover body 50 is integrally bent and formed from a sheet material. By forming the cylindrical portion 52, the cover body 50 is in a cylindrical structure. The cylindrical portion 52 is a rectangular cylinder. The cylindrical portion 52 is sleeved on the extending convex portion of the insulator 1 extending out of the shielding piece. The insertion end 21 of the signal terminal 2 extends into the inner cavity of the U-shaped portion 51. The signal terminal 2 of the male terminal connector and the contact member of the female terminal connector are inserted in the inner cavity of the U-shaped portion 51. The side opening of the U-shaped portion 51 can play a shielding role on the corresponding side through the connecting wall of the corresponding shielding cover 5 of the other terminal module 100.

[0056] In order to make the shielding shields 5 of each terminal module 100 of the connector share the same ground, each shielding shield 5 is inserted into the same shielding inner shell 200. The shielding inner shell 200 is provided with mounting cavities corresponding one by one to the shielding shields 5. The cylindrical part 52 of the shielding shield 5 is located in the mounting cavity. Conductive protrusions 53 are provided on the part of the side wall of the shield body 50 located at the cylindrical part 52. The conductive protrusions 53 are in interference fit with the wall of the corresponding mounting cavity of the shielding inner shell 200, which can ensure reliable contact. The shielding inner shell 200 can be conductive, and each shielding shield 5 realizes sharing the same ground through the shielding inner shell 200. The U-shaped part 51 of the shield body 50 passes through the shielding inner shell 200. After each terminal module 100 and the shielding inner shell 200 are installed on the fixed outer shell 300, the U-shaped part 51 of the shield body 50 can be exposed from the side of the fixed outer shell 300 where the mating female terminal connector is inserted. The corresponding shielding shell of the female terminal connector is inserted into the fixed outer shell 300 of the male terminal connector, so that the U-shaped part 51 is inserted into the corresponding shielding shell of the female terminal connector for shielding conduction.

[0057] A groove 55 is provided on the outer wall of the shield body 50. The fixing part 542 of the contact piece 54 is fixed in the groove 55, which can prevent the contact piece 54 from protruding too high from the outer surface of the shield body 50, which is beneficial to saving space. Contact pieces 54 are provided on the parts of the two side walls of the shield body 50 located at the U-shaped part 51. The contact pieces 54 are arranged at the parts of the side walls of the shield body 50 close to the connecting wall. Grooves 55 are provided at each contact piece 54. The contact pieces 54 are contact elastic pieces, and their contact parts 541 are used for elastically pressing and contacting with the shielding structure of the female terminal connector. The extending direction of the groove 55 is the same as the length direction of the contact piece 54. The length direction of the contact piece 54 is the same as the insertion direction of the connector. The fixing part 542 of the contact piece 54 is a straight section, and the thickness of the fixing part 542 is less than the depth of the groove 55. The fixing part 542 is welded and fixed in the groove 55. The contact part 541 of the contact piece 54 protrudes from the groove 55. The fixing part 542 constitutes the root of the contact piece 54. The contact part 541 is arranged at the end of the contact piece 54. The part between the fixing part 542 and the contact part 541 of the contact piece 54 warps outwards. The end of the contact piece 54 is a bent structure and the end edge bends inwards, so as to use the bent end of the contact piece 54 to guide the shielding shield 5 to be inserted into the shielding cavity of the female terminal connector.

[0058] A counterbore 56 for the end edge of the contact piece 54 to extend into is provided at the end of the groove 55 corresponding to the contact part 541. The end edge of the contact piece 54 can be hidden in the counterbore 56, so that the end edge of the contact piece 54 extends to the inner side of the outer wall surface of the shield body 50 close to the shield inner cavity, and the end edge of the contact piece 54 does not protrude from the outer wall surface of the shield body 50. In this way, during insertion, it is not easy for the end edge of the contact piece 54 to top against the end face of the shielding shell of the female terminal connector due to position deviation, resulting in the contact piece 54 being broken. The counterbore 56 is a through hole, which can provide space for the inner deformation of the end of the contact piece 54.

[0059] As Figure 2 , Figure 3 , Figure 5 , Figure 9 shown, the shielding cover 5 is separately provided from and in conductive contact with the first shielding piece 3 and the second shielding piece 4. The shielding cover 5 and the shielding pieces can be separately formed, which is convenient for the forming of the shielding cover 5. The shielding covers 5 have a unified specification, which can save the mold development cost. The first shielding piece 3 and the second shielding piece 4 are fixed by the thermal riveting posts 11 on the insulator 1. One end of the first shielding piece 3 and the second shielding piece 4 is provided with a connection groove 6 for the shielding cover 5 to be snap-fitted. The end portions of the two side walls of the shielding cover 5 are snapped into the connection groove 6. The connection groove 6 of the first shielding piece 3 corresponds to the connection groove 6 of the second shielding piece 4 one by one, and the same side wall of the shielding cover 5 is snap-fitted with the corresponding connection grooves 6 of the first shielding piece 3 and the second shielding piece 4. A pressing convex portion 8 for pressing and cooperating with the shielding cover 5 is provided on the inner wall of the connection groove 6. On the side of the shielding piece facing away from the connection groove 6 of the pressing convex portion 8, a deformation avoidance hole 7 for the elastic deformation of the pressing convex portion 8 is provided, so that the pressing convex portion 8 is in elastic pressing contact with the shielding cover 5, which is beneficial to reliable contact.

[0060] As Figure 3 , Figure 4 , Figure 10 shown, the thickness of the insertion end 21 of the signal terminal 2 is greater than the thickness of the wiring main body. When forming the signal terminal 2, the insertion end 21 is thickened by folding two corresponding parts of the sheet material, which can ensure the structural strength of the pin while using a sheet material with a smaller material thickness for processing. A bending portion 23 is provided at the part of the wiring main body of the signal terminal 2 close to the folded and thickened insertion end 21 to ensure that the centers of the insertion end 21 and the crimping end 22 in the thickness direction are still in the same plane, and to keep the positions of the male connector, the female connector and the printed circuit board matched.

[0061] In other embodiments, the groove may not be provided, and the contact elastic piece is directly fixedly connected to the outer wall surface of the shield main body.

[0062] In other embodiments, the counterbore may not be provided, and the end edge of the contact elastic piece extends into the groove, and the space in the groove is used to prevent the end edge of the contact elastic piece from protruding.

[0063] In other embodiments, the counterbore may not be provided, and the end of the contact elastic piece extends to the front side of the shield main body, and the end edge of the contact elastic piece extends to the inner side of the outer wall surface of the shield main body close to the shield inner cavity by bending the end of the contact elastic piece inward.

[0064] In other embodiments, the shield main body may also be a U-shaped structure with a completely open side.

[0065] Embodiment 2 of the connector of the present invention:

[0066] The connector includes a plurality of terminal modules, and the terminal modules include a shielding shield. This embodiment provides a shielding shield deformation mode different from that of embodiment 1. The connector of this embodiment is different from the connector of embodiment 1 only in the structure of the contact piece of the shielding shield, such as Figure 11 and Figure 12 As shown, the contact piece 54 in this embodiment is not a spring piece with one end fixed and the other end raised, but a rigid piece. A convex bump is provided at the center of the contact piece 54, and the convex bump forms a contact portion 541. The contact piece 54 is fixed in a groove 55 on the side wall of the shield body 50, and the convex bump is higher than the outer surface of the side wall of the shield body 50. The part of the contact piece located outside the contact portion 541 constitutes a fixing portion 542 to be welded and fixed to the bottom of the groove 55.

[0067] Embodiment of the terminal module of the utility model:

[0068] The terminal module of this embodiment is the same as the terminal module in Embodiment 1 or 2 of the above-mentioned connector, and will not be described again here.

[0069] Embodiments of the shielding cover of the utility model:

[0070] The shielding shield of this embodiment is the same as the shielding shield in Embodiment 1 or 2 of the above connector, and will not be described again here.

[0071] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A shielding cover, characterized in that It includes a separately formed shield body (50) and a contact piece (54). The shield body (50) has a shield inner cavity for shielding the insertion end (21) of the signal terminal (2) of the connector. The contact piece (54) has a fixing portion (542) fixedly connected to the outer wall of the shield body (50) and a contact portion (541) for pressing contact with the shielding structure of the mating connector.

2. The shielding cover according to claim 1, characterized in that, A groove (55) is provided on the outer wall of the shield body (50), and the fixing portion (542) of the contact piece (54) is fixed in the groove (55).

3. The shielding cover according to claim 2, characterized in that, The contact piece (54) is a contact spring piece. The extending direction of the groove (55) is the same as the length direction of the contact spring piece. The end of the contact spring piece is a bent structure. The contact portion (541) is arranged at the end of the contact spring piece. A counterbore (56) is provided at the end of the groove (55), and the edge of the end of the contact spring piece extends into the counterbore (56).

4. The shielding cover according to claim 1 or 2, characterized in that, The end of the contact spring piece is a bent structure. The contact portion (541) is arranged at the end of the contact spring piece. The edge of the end of the contact spring piece extends to the inner side of the outer wall surface of the shield body (50) close to the shield inner cavity.

5. The shielding cover according to claim 4, characterized in that, A counterbore (56) is provided on the shield body (50), and the edge of the end of the contact spring piece extends into the counterbore (56).

6. The shielding cover according to claim 1 or 2, characterized in that, A convex bump is provided on the contact piece (54), and the convex bump forms the contact portion (541).

7. The shielding cover according to claim 1 or 2 or 3, characterized in that, The shield body (50) is a cylindrical structure.

8. A terminal module, comprising an insulator (1) and signal terminals (2) fixed on the insulator (1), characterized in that, It further includes the shielding shield according to any one of claims 1-7 above.

9. The terminal module according to claim 8, characterized in that, At least one side in the thickness direction of the insulator (1) is provided with a shielding sheet. The shielding shield (5) is separately arranged from the shielding sheet and is in conductive contact.

10. The terminal module according to claim 9, characterized in that, A connection groove (6) for the end of the side wall of the shielding shield (5) to be inserted into is provided on the shielding sheet. A pressing convex portion (8) for pressing cooperation with the shielding shield (5) is provided on the inner wall of the connection groove (6). A deformation relief hole (7) for the elastic deformation of the pressing convex portion (8) is provided on the shielding sheet on the side opposite to the connection groove (6) of the pressing convex portion (8).

11. A connector, characterized in that, It includes the terminal module according to any one of claims 8-10 above.

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