Shielding sheet, terminal module and backboard connector

Abstract

The utility model provides a shielding sheet, a terminal module and a backboard connector, and belongs to the field of connecting devices. The shielding sheet comprises a main sheet body, the main sheet body is provided with opening clamping grooves used for being connected with a shielding cylinder in an inserted mode, the opening clamping grooves are arranged in groups, each group comprises two opening clamping grooves used for being connected with two opposite side walls on the same shielding cylinder in an inserted mode, and at least one side of part of or all the opening clamping grooves on the main sheet body is provided with a deformation receding groove. And a deformation arm is formed on the part, between the deformation abdicating groove and the corresponding opening clamping groove, of the main sheet body. The terminal module comprises the shielding sheet. The backboard connector comprises the terminal module. According to the utility model, the deformation abdicating groove is arranged on at least one side of the opening clamping groove on the main sheet body, so that the part between the deformation abdicating groove and the opening clamping groove forms the deformation arm capable of elastically deforming, and the shielding cylinder can be conveniently installed.

Description

Technical Field

[0001] This utility model belongs to the field of connection devices, and in particular relates to a shielding sheet, a terminal module and a backplate connector. Background Technology

[0002] High-speed backplane connectors are widely used in core communication equipment such as switches and servers. With the increase in communication transmission rate, high-speed backplane connectors need to have stronger anti-crosstalk capabilities.

[0003] A typical high-speed backplane connector consists of a housing and plate-shaped terminal modules mounted within the housing. Each terminal module includes multiple pairs of signal terminals for transmitting differential signals, an insulator for securing the signal terminals and insulating them from each other, and a shielding plate mounted on at least one side of the insulator for shielding between different terminal modules. To achieve better shielding at the mating ends where high-speed backplane connectors mate with adapter connectors, a shielding structure that fully surrounds the signal terminals is typically used.

[0004] For example, Chinese invention patent application CN117543286A provides a connector female end chip and a high-speed backplane connector. The connector female end chip is a terminal module. This terminal module has a shielding cylinder for each pair of signal terminals at the plug-in end. The shielding cylinder has a shielding cavity inside, which provides a complete shielding effect for the corresponding part of the signal terminal and the plug-in end. A conductive connection structure is provided between the shielding cylinder and the shielding sheet or grounding terminal. The shielding cylinder also has spring claws to facilitate conductive contact with the grounding part of the adapter connector. In one embodiment, the conductive connection structure is an open slot on the shielding cylinder, into which the shielding sheet can be inserted to achieve fixing and conductive connection between the shielding cylinder and the shielding sheet.

[0005] Because the shielding sheet is relatively large, and there are shielding sheets on both sides of the terminal module in the thickness direction, the shielding cylinder inserted into the shielding sheet can have better connection stability. In order to ensure the stability of the shielding cylinder installation and the reliability of the conductive contact, the side wall of the slot of the open card slot needs to fit tightly with the shielding cylinder. However, since the part between two adjacent open card slots on the shielding sheet is solid, the side walls of the slot are difficult to deform. Therefore, the resistance is large during the insertion of the shielding cylinder, which will cause assembly difficulties. Utility Model Content

[0006] One of the objectives of this utility model is to provide a shielding sheet to solve the technical problem in the prior art where the sidewall of the slot for inserting the shielding tube is difficult to deform, resulting in difficulty in inserting the shielding tube.

[0007] One of the objectives of this utility model is to provide a terminal module to solve the above-mentioned technical problems;

[0008] One of the objectives of this utility model is to provide a backplane connector to solve the above-mentioned technical problems.

[0009] To achieve the above objectives, the technical solution for the shielding sheet provided by this utility model is as follows:

[0010] A shielding sheet includes a main sheet body with open slots for insertion into a shielding cylinder. The open slots are arranged in groups, and each group includes two open slots for insertion into opposite side walls of the same shielding cylinder. A deformation clearance groove is provided on at least one side of some or all of the open slots on the main sheet body, and a deformation arm is formed on the portion of the main sheet body located between the deformation clearance groove and the corresponding open slot.

[0011] As a further improvement, the portion of the main body located between two adjacent sets of opening slots forms a cantilever structure, and the end of the cantilever structure is provided with an inter-group deformation clearance groove. The portions of the cantilever structure located on both sides of the inter-group deformation clearance groove form deformable arms.

[0012] As a further improvement, the portion of the main body between two open slots in the same group is provided with a clearance groove for avoiding the protrusions on the insulator. The portion of the main body between the clearance groove and the two adjacent open slots forms a deformable arm, and the clearance groove constitutes a deformable clearance groove.

[0013] As a further improvement, the sidewall of the open slot includes a guide portion and a contact portion. The width of the slot opening is greater than the width of the contact portion. The guide portion is an inclined or curved surface used to guide the shielding cylinder from the slot opening to the contact portion.

[0014] As a further improvement, the sidewall of the open slot also includes an adjustment part, which is located between the contact part and the bottom of the open slot, and the width of the open slot at the adjustment part is greater than the width of the open slot at the contact part.

[0015] As a further improvement, the contact part has an arc-shaped convex structure.

[0016] As a further improvement, the length of the adjustment portion of at least one of the open slots located at both ends of the shielding sheet is less than the length of the adjustment portion of the remaining open slots on the main sheet.

[0017] As a further improvement, at least part of the deformation allows the bottom of the groove to have an arc-shaped structure.

[0018] The beneficial effects are as follows: The shielding sheet provided by this utility model is an improvement on the prior art. This shielding sheet has a deformation relief groove provided on at least one side of the open slot on the main body, so that the portion between the deformation relief groove and the open slot forms a deformable arm capable of elastic deformation. During the process of inserting the shielding cylinder into the open slot, the deformable arm can undergo elastic deformation by bending under the pushing action of the shielding cylinder, facilitating the insertion of the shielding cylinder. After the shielding cylinder is installed, the deformable arm maintains a pressing force against the shielding cylinder under the action of elastic recovery, thereby ensuring the stability of the shielding cylinder and the reliability of the contact and conduction between the shielding cylinder and the shielding sheet during use.

[0019] To achieve the above objectives, the technical solution for the terminal module provided by this utility model is as follows:

[0020] A terminal module includes a signal terminal, an insulator, a shielding sheet, and a shielding cylinder. The shielding sheet includes a main body with open slots for insertion into the shielding cylinder. The open slots are arranged in groups, and each group includes two open slots for insertion into opposite side walls of the same shielding cylinder. The main body has a deformation clearance groove on at least one side of some or all of the open slots, and a deformation arm is formed on the portion of the main body between the deformation clearance groove and the corresponding open slot.

[0021] As a further improvement, the portion of the main body located between two adjacent sets of opening slots forms a cantilever structure, and the end of the cantilever structure is provided with an inter-group deformation clearance groove. The portions of the cantilever structure located on both sides of the inter-group deformation clearance groove form deformable arms.

[0022] As a further improvement, the portion of the main body between two open slots in the same group is provided with a clearance groove for avoiding the protrusions on the insulator. The portion of the main body between the clearance groove and the two adjacent open slots forms a deformable arm, and the clearance groove constitutes a deformable clearance groove.

[0023] As a further improvement, the sidewall of the open slot includes a guide portion and a contact portion. The width of the slot opening is greater than the width of the contact portion. The guide portion is an inclined or curved surface used to guide the shielding cylinder from the slot opening to the contact portion.

[0024] As a further improvement, the sidewall of the open slot also includes an adjustment part, which is located between the contact part and the bottom of the open slot, and the width of the open slot at the adjustment part is greater than the width of the open slot at the contact part.

[0025] As a further improvement, the contact part has an arc-shaped convex structure.

[0026] As a further improvement, the length of the adjustment portion of at least one of the open slots located at both ends of the shielding sheet is less than the length of the adjustment portion of the remaining open slots on the main sheet.

[0027] As a further improvement, at least part of the deformation allows the bottom of the groove to have an arc-shaped structure.

[0028] The beneficial effects are as follows: The terminal module provided by this utility model is an improvement on the prior art. The shielding plate in this terminal module has a deformation relief groove provided on at least one side of the open slot on the main plate body, so that the portion between the deformation relief groove and the open slot forms a deformable arm capable of elastic deformation. During the process of inserting the shielding cylinder into the open slot, the deformable arm can undergo elastic deformation by bending under the pushing action of the shielding cylinder, facilitating the installation of the shielding cylinder. After the shielding cylinder is installed, the deformable arm maintains a pressing force against the shielding cylinder under the action of elastic recovery, thereby ensuring the stability of the shielding cylinder and the reliability of the contact and conduction between the shielding cylinder and the shielding plate during use.

[0029] To achieve the above objectives, the technical solution for the backplane connector provided by this utility model is as follows:

[0030] A backplane connector includes a housing and a terminal module installed within the housing. The terminal module includes signal terminals, an insulator, a shielding plate, and a shielding cylinder. The shielding plate includes a main body with open slots for insertion into the shielding cylinder. The open slots are arranged in groups, and each group includes two open slots for insertion into opposite side walls of the same shielding cylinder. The main body has a deformation relief groove on at least one side of some or all of the open slots, and a deformation arm is formed on the portion of the main body between the deformation relief groove and the corresponding open slot.

[0031] As a further improvement, the portion of the main body located between two adjacent sets of opening slots forms a cantilever structure, and the end of the cantilever structure is provided with an inter-group deformation clearance groove. The portions of the cantilever structure located on both sides of the inter-group deformation clearance groove form deformable arms.

[0032] As a further improvement, the portion of the main body between two open slots in the same group is provided with a clearance groove for avoiding the protrusions on the insulator. The portion of the main body between the clearance groove and the two adjacent open slots forms a deformable arm, and the clearance groove constitutes a deformable clearance groove.

[0033] As a further improvement, the sidewall of the open slot includes a guide portion and a contact portion. The width of the slot opening is greater than the width of the contact portion. The guide portion is an inclined or curved surface used to guide the shielding cylinder from the slot opening to the contact portion.

[0034] As a further improvement, the sidewall of the open slot also includes an adjustment part, which is located between the contact part and the bottom of the open slot, and the width of the open slot at the adjustment part is greater than the width of the open slot at the contact part.

[0035] As a further improvement, the contact part has an arc-shaped convex structure.

[0036] As a further improvement, the length of the adjustment portion of at least one of the open slots located at both ends of the shielding sheet is less than the length of the adjustment portion of the remaining open slots on the main sheet.

[0037] As a further improvement, at least part of the deformation allows the bottom of the groove to have an arc-shaped structure.

[0038] The beneficial effects are as follows: The backplate connector provided by this utility model is an improvement on the prior art. The shielding plate in this backplate connector has a deformation relief groove provided on at least one side of the open slot on the main plate body, so that the portion between the deformation relief groove and the open slot forms a deformable arm capable of elastic deformation. During the process of inserting the shielding cylinder into the open slot, the deformable arm can undergo elastic deformation by bending under the pushing action of the shielding cylinder, facilitating the installation of the shielding cylinder. After the shielding cylinder is installed, the deformable arm maintains a pressing force against the shielding cylinder under the action of elastic recovery, thereby ensuring the stability of the shielding cylinder and the reliability of the contact and conduction between the shielding cylinder and the shielding plate during use. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the backplate connector in this utility model;

[0040] Figure 2 This is a schematic diagram of the terminal module in Embodiment 1 of the backplate connector of this utility model;

[0041] Figure 3 This is a partial structural diagram of the terminal module in Embodiment 1 of the backplate connector of this utility model;

[0042] Figure 4 This is a partial structural diagram of the shielding sheet in Embodiment 1 of the backplate connector of this utility model.

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Housing; 2. Signal terminal; 3. Insulator; 31. Raised structure; 4. Shielding plate; 41. Main plate body; 42. Opening slot; 421. Guide part; 422. Contact part; 423. Adjustment part; 43. Intra-group deformation clearance groove; 44. Inter-group deformation clearance groove; 45. Cantilever structure; 46. First deformable arm; 47. Second deformable arm; 5. Shielding cylinder; 6. Fixing plate; 7. Positioning plate. Detailed Implementation

[0045] The present invention will be further described in detail below with reference to the embodiments.

[0046] To address the problems in the prior art, the basic concept of this utility model is to provide a deformation clearance groove on at least one side of the open slot on the main body of the shielding sheet, so that the side wall of the open slot can deform when the shielding cylinder is installed, thereby reducing the installation difficulty of the shielding cylinder.

[0047] Specific embodiment 1 of the backplane connector provided by this utility model:

[0048] See appendix Figure 1 The backplane connector includes a housing 1 and multiple terminal modules mounted within the housing 1. The backplane connector also includes a retaining plate 6 and a positioning plate 7, which are used to connect the terminal modules. See appendix. Figure 2 The terminal module includes signal terminals 2, insulators 3, shielding plates 4, and shielding cylinders 5. The signal terminals 2 are arranged in pairs and fixed on the insulators 3. The shielding plates 4 are installed on both sides of the insulators 3 in the thickness direction. The end of the backplane connector used to plug into the adapter connector is its plug end. The shielding cylinder 5 is installed at the end of the shielding plate 4 corresponding to the plug end.

[0049] See appendix Figure 3 and attached Figure 4 The shielding sheet 4 includes a main body 41. One end of the main body 41 corresponding to the insertion end is provided with an open slot 42 for installing each shielding cylinder 5. Each open slot 42 is arranged along the straight edge of the end of the shielding sheet 4 corresponding to the insertion end. The open slots 42 are arranged in groups, with each group including two open slots 42. The two open slots 42 in a group are respectively inserted into two opposite side walls of the same shielding cylinder 5. The main body 41 also has deformation clearance grooves corresponding to some of the open slots 42. The function of the deformation clearance grooves is to form a deformable arm on the main body 41 between the deformation clearance groove and the corresponding adjacent open slot 42. This allows the deformable arm to be pushed open to one side when the cylinder wall of the shielding cylinder 5 is inserted into the open slot 42, causing the deformable arm to elastically deform. This ensures good conductive contact between the shielding cylinder 5 and the deformable arm, and also facilitates the insertion of the shielding cylinder 5.

[0050] In this embodiment, the deformation clearance groove is divided into inter-group deformation clearance groove and intra-group deformation clearance groove 43. The intra-group deformation clearance groove 43 is located between two open slots 42 in the same group, and the inter-group deformation clearance groove 44 is located between two adjacent group open slots 42.

[0051] The width of the internal deformation clearance groove 43 is relatively large. In addition to forming a deformation arm on the part of the main plate 41 located between the internal deformation clearance groove 43 and the corresponding two open slots 42, the internal deformation clearance groove 43 is also used to avoid the protrusion structure 31 on the insulator 3. The protrusion structure 31 on the insulator 3 protrudes along the thickness direction of the insulator 3 to strengthen the insulator 3.

[0052] The shielding cylinders 5 on the same terminal module are arranged relatively closely, so the spacing between two adjacent sets of open slots 42 is relatively small. The part of the main body 41 located between two adjacent sets of open slots 42 naturally forms a cantilever structure 45, and the inter-group deformation clearance groove 44 is located at the end of the cantilever structure 45.

[0053] The deformable arm formed by the inter-group deformation clearance groove 44 is the first deformable arm 46, and the deformable arm formed by the intra-group deformation clearance groove 43 is the second deformable arm 47. The first deformable arm 46 is narrower than the second deformable arm 47, and the deformation capacity of the first deformable arm 46 is stronger than that of the second deformable arm 47. Therefore, the first deformable arm 46 is the main deformation structure during the installation of the shielding cylinder 5. This ensures that the shielding cylinder 5 is installed better and that the shielding cylinder 5 has good positioning.

[0054] The bottom of the inter-group deformation clearance groove 44 is an arc-shaped structure, which can prevent stress concentration at the roots of the two corresponding first deformation arms 46 from causing breakage.

[0055] Both sides of the open slot 42 include a guide portion 421, a contact portion 422, and an adjustment portion 423, which are arranged sequentially from the opening to the bottom of the slot 42. The width of the slot 42 gradually decreases from the opening to the guide portion 421 and then to the contact portion 422, and gradually increases from the contact portion 422 to the adjustment portion 423. The guide portion 421 is a beveled or curved edge. During the insertion of the shielding cylinder 5, the guide portion 421 can guide the shielding cylinder 5 from the opening of the slot 42 to the contact portion 422, ensuring the smooth insertion of the shielding cylinder 5. The guide portions 421 on both sides of the same open slot 42 have different lengths because the arrangement of the shielding cylinder 5 is relatively compact, resulting in a narrower cantilever structure 45. After setting the guide portion 421 on the side corresponding to the cantilever structure 45 of the open slot 42, the end of the cantilever structure 45 will be even narrower. With a sufficiently wide inter-assembly deformation clearance groove 44 at the end of the cantilever structure 45, the length of the cantilever structure 45 will naturally shorten. To avoid sharp corners at the end of the cantilever structure 45 that could scratch components such as the shielding cylinder 5 during assembly, the end of the cantilever structure 45 is designed as an arc surface. This makes the end of the cantilever structure 45 shorter and unable to align with the edge of the shielding plate 4. With the cantilever structure 45 shortened, the corresponding guide portion 421 on that side is also shorter. In the same open slot 42, the longer guide portion 421 can serve as the primary guide for installing the shielding cylinder 5, while the shorter guide portion 421 can serve as the secondary guide for installing the shielding cylinder 5.

[0056] The design of the sidewall of the opening slot 42 allows for a smaller contact area between the contact portion 422 and the shielding cylinder 5, thereby reducing friction during insertion into the shielding cylinder 5 and simplifying its installation. In this embodiment, the contact portion 422 is specifically an arc-shaped convex structure, which allows the contact portion 422 and the shielding cylinder 5 to form an approximate line contact, improving the reliability of contact conductivity.

[0057] Changing the length of the adjusting part 423 can alter the deformation capability of the groove sidewall of the open slot 42. The longer the adjusting part 423, the stronger the deformation capability of the corresponding groove sidewall of the open slot 42. At both ends of the main body 41, the portion between the open slot 42 and the corresponding end wall of the main body 41 is not constrained and therefore deforms more easily than the deformable arm. To avoid excessive deformation of this portion and reduced springback force, when setting the open slot 42, the groove depth of some or all of the open slots 42 located at both ends of the main body 41 can be made smaller than the groove depth of other open slots 42, as needed. The length of the adjustment section 423 can be set as needed. Specifically, the adjustment sections 423 of all open slots 43 can be equal and all relatively long, or the adjustment sections 423 of all open slots 43 can be equal and all relatively short, or only the adjustment sections 423 of the open slots 43 at both ends of the shielding sheet 5 can be set to be relatively short. However, the length of the adjustment section 423 should not be too long and expose the signal traces, otherwise it will affect the SI performance of the backplane connector. When the length of the adjustment section 423 is 0, it can be considered that no adjustment section 423 is provided.

[0058] This invention, by setting a deformation relief groove, forms an easily deformable deformable arm between the deformation relief groove and the open slot 42. During the process of inserting the shielding cylinder 5 into the open slot 42, the deformable arm can undergo elastic deformation by bending under the pushing action of the shielding cylinder 5, which facilitates the installation of the shielding cylinder 5. After the shielding cylinder 5 is installed, the deformable arm maintains a pressing force with the shielding cylinder 5 under the action of elastic recovery, thereby ensuring the stability of the shielding cylinder 5 and the reliability of the contact and conduction between the shielding cylinder 5 and the shielding sheet 4 during use. In addition, if the shielding cylinder 5 shakes during use, the deformable arm can still maintain a close contact and pressing force with the shielding cylinder 5 because it can elastically deform.

[0059] Specific embodiment 2 of the backplane connector provided by this utility model:

[0060] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the spacing between two adjacent sets of opening slots on the main body is larger. Therefore, the main body is provided with two deformation clearance slots between two adjacent sets of opening slots, and each deformation clearance slot corresponds to an adjacent opening slot.

[0061] Specific embodiment 3 of the backplate connector provided by this utility model:

[0062] This embodiment is based on Embodiment 1, but differs from Embodiment 1 in that the insulator in this embodiment does not have a protruding structure. Therefore, the intra-group deformation clearance groove is only used to form a deformable arm on the portion of the main sheet body located between the intra-group deformation clearance groove and the corresponding two open slots. Furthermore, this embodiment has two intra-group deformation clearance grooves, each corresponding to an adjacent open slot.

[0063] Specific embodiment 4 of the backplane connector provided by this utility model:

[0064] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that only the inter-group deformation clearance groove is provided, and the intra-group deformation clearance groove is not provided.

[0065] Specific embodiment 5 of the backplane connector provided by this utility model:

[0066] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the side wall of the slot of the open card slot is a straight wall. During the process of inserting the shielding tube, the chamfer on the shielding tube is used for insertion guidance.

[0067] Specific embodiment 6 of the backplane connector provided by this utility model:

[0068] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the contact part in this embodiment has a flat structure and the contact part and the shielding cylinder are in surface contact.

[0069] Specific embodiment 7 of the backplate connector provided by this utility model:

[0070] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the length of the adjustment part of all the open slots is the same in this embodiment.

[0071] Specific embodiment 8 of the backplane connector provided by this utility model:

[0072] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the bottom of all the deformation clearance grooves in this embodiment is an arc-shaped structure.

[0073] Specific embodiment 9 of the backplane connector provided by this utility model:

[0074] This embodiment is based on Embodiment 1. The difference between this embodiment and Embodiment 1 is that the bottom of all the deformation relief grooves in this embodiment is a right-angle structure. In this embodiment, the depth of the deformation relief groove can be increased so that the length of the corresponding deformation arm is longer, thereby achieving better elastic deformation and making it less prone to breakage.

[0075] Specific embodiments of the terminal module provided by this utility model:

[0076] The terminal module provided by this utility model is the terminal module in the specific embodiment of the backplane connector described above, and will not be described again.

[0077] Specific embodiments of the shielding sheet provided by this utility model:

[0078] The shielding sheet provided by this utility model is the shielding sheet in the specific embodiment of the backplate connector mentioned above, and will not be described again.

[0079] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is not intended to limit this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make modifications to the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A shielding sheet, comprising a main sheet body (41), wherein the main sheet body (41) is provided with open slots (42) for insertion into a shielding cylinder (5), the open slots (42) being arranged in groups, each group including two open slots (42) for insertion into opposite side walls of the same shielding cylinder (5), characterized in that the main sheet body (41) has open slots (42) for insertion into opposite side walls of the same shielding cylinder (5), wherein the main sheet body (41) has open slots (42) for insertion into opposite side walls of the same shielding cylinder (5), characterized in that ... A deformation relief groove is provided on at least one side of a partially or fully open slot (42) on the sheet body (41), and a deformation arm is formed on the part of the main sheet body (41) between the deformation relief groove and the corresponding open slot (42).

2. The shielding sheet according to claim 1, characterized in that, the main... The portion of the sheet body (41) located between two adjacent sets of open slots (42) forms a cantilever structure (45). The end of the cantilever structure (45) is provided with an inter-group deformation clearance groove (44). The portions of the cantilever structure (45) located on both sides of the inter-group deformation clearance groove (44) form deformable arms.

3. The shielding sheet according to claim 1 or 2, characterized in that, the main... The portion of the sheet body (41) between two open slots (42) in the same group is provided with a clearance groove for avoiding the protrusion structure (31) on the insulator (3). The portion of the main sheet body (41) between the clearance groove and the two adjacent open slots (42) forms a deformable arm. The clearance groove constitutes a deformable clearance groove.

4. The shielding sheet according to claim 1 or 2, characterized in that, The sidewall of the open slot (42) includes a guide portion (421) and a contact portion (422). The width of the slot opening of the open slot (42) is greater than the width of the contact portion (422). The guide portion (421) is an inclined or arc-shaped surface used to guide the shielding cylinder (5) from the slot opening to the contact portion (422).

5. The shielding sheet according to claim 4, characterized in that, The groove sidewall of the open slot (42) also includes an adjustment part (423), which is located between the contact part (422) and the bottom of the open slot (42). The width of the open slot (42) at the adjustment part (423) is greater than the width of the open slot (42) at the contact part (422).

6. The shielding sheet according to claim 4, characterized in that, The contact part (422) has an arc-shaped convex structure.

7. The shielding sheet according to claim 5, characterized in that the shielding sheet... The length of the adjustment part (423) of at least one of the open slots (42) at both ends is less than the length of the adjustment part of the other open slots (42) on the main body (41).

8. The shielding sheet according to claim 1 or 2, characterized in that, At least part of the deformation allows the bottom of the groove to have an arc-shaped structure.

9. A terminal module comprising an insulator (3), a shielding sheet (4) mounted on at least one side in the thickness direction of the insulator (3), and a shielding cylinder (5) mounted on the shielding sheet (4), characterized in that, The shielding sheet (4) is the shielding sheet according to any one of claims 1-8.

10. A backplane connector, comprising a housing (1) and a terminal module mounted within the housing (1), characterized in that, The terminal module is the terminal module as described in claim 9.

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