Shielding structure and electrical connector using the same

Abstract

The present invention discloses a shielding structure and an electrical connector using the structure, comprising a signal transmission module and at least one shielding shell. The shielding shell comprises a shielding shell body and latches, the latches being located on both sides of the shielding shell body, with at least one latch provided on each side. The signal transmission module comprises differential pair traces and grounding members, the grounding members being located on both sides of the differential pair traces, the grounding members being provided with latching holes that engage with the latches, the shielding shell and the grounding members being fastened together via the latches and the latching holes. The shielding shells are fastened to both sides of the differential pair traces, with each shielding shell shielding only one differential pair trace. This device optimizes the fixing method of the shielding shell, making the shielding structure less susceptible to detachment and avoiding crosstalk between adjacent differential pairs.

Description

Technical Field

[0001] The present invention belongs to the technical field of connectors, and in particular relates to a shielding structure and an electrical connector using the same. Background Art

[0002] Similar connector products in the prior art use the following shielding structures and fixing methods:

[0003] (1) Shielding structure fixing method: After the shield is removed from the shell, it is fixed by plastic columns. The fixing method is shown in Figure 1 and Figure 2 ,The disadvantage of this structure is that the distance between the shielding ,shell and the differential pair fluctuates, causing characteristic impedance ,fluctuations and affecting high-speed signal transmission.

[0004] (2) Shielding structure: The two sides of the differential pair of similar connector products are formed into a U-shaped shielding cavity through two shell structures. The rib openings of the U-shaped structure are buckled with the plastic columns on the wafer plastic. The structure is shown in Figure 3 The disadvantage is that the depth of the shielding shell after extraction varies. When the extraction depth is insufficient or the shielding shell is not properly fastened, the shielding shell cannot shield the differential pair traces from radiating electromagnetic waves to adjacent differential pair traces, thereby worsening the crosstalk between adjacent differential pairs. Summary of the Invention

[0005] The purpose of the present invention is to solve the above-mentioned problems in the prior art and provide a shielding structure and an electrical connector using the structure. The device optimizes the fixing method of the shielding shell, making the shielding structure not easy to detach, thereby avoiding the crosstalk problem of adjacent differential pairs.

[0006] One of the objects of the present invention is to provide a shielding structure, including a signal transmission module and a shielding shell, the shielding shell including a shielding shell body and a snap, the snaps are distributed on both sides of the shielding shell body, and at least one snap is set on each side, the signal transmission module includes differential pair routing and a grounding member, the grounding member is set on both sides of the differential pair routing, the grounding member is provided with a snap hole connected to the snap, the shielding shell and the grounding member are snapped together through the snap and the snap hole, the shielding shell is snapped on both sides of the differential pair routing, and each shielding shell only shields one pair of differential pair routing.

[0007] As a preferred solution, the buckle is an elastic member, and the buckle is snapped into the clamping hole, and the buckle and the clamping hole are locked and connected through the elastic inward contraction of the buckle.

[0008] As a preferred solution, the clip includes a first elastic arm and a second elastic arm, and the first elastic arm and the second elastic arm are both connected to the shielding shell body. When the clip is snapped into the snap hole, the first elastic arm and the second elastic arm are squeezed by the snap hole and approach each other. After the clip is snapped into the snap hole, the first elastic arm and the second elastic arm are deformed in a direction away from each other to achieve a snap connection.

[0009] As a preferred solution, the insertion ends of the first elastic arm and the second elastic arm are not connected.

[0010] As a preferred solution, the insertion ends of the first elastic arm and the second elastic arm are connected via an intermediate connecting section.

[0011] As a preferred solution, it also includes an insulating shell, and the signal transmission module is inserted into the matching cavity of the insulating shell. At least one locking protrusion corresponding to the shielding shell is provided on the inner wall of the matching cavity. The locking protrusion is in contact with the outer end face of the shielding shell on the signal transmission module and is used to fix the signal transmission module from a first direction, which is a direction perpendicular to the end face of the locking protrusion.

[0012] As a preferred solution, at least one protrusion is provided on each side of the signal transmission module, and the protrusion is used to form a strong interference fit with the inner wall of the matching cavity of the insulating shell to fix the signal transmission module.

[0013] As a preferred solution, it also includes an insulating shell 3, and the signal transmission module is inserted into the matching cavity of the insulating shell. At least one positioning protrusion corresponding to the shielding shell is provided on the inner wall of the matching cavity, and the positioning protrusion is in contact with the outer end face of the shielding shell on the signal transmission module, and is used to fix the signal transmission module from a first direction; at least one protrusion is provided on each side of the signal transmission module, and the protrusion forms a strong interference fit with the inner side wall of the matching cavity, and is used to fix the signal transmission module from a direction perpendicular to the first direction; the first direction is a direction perpendicular to the end face of the positioning protrusion.

[0014] As a preferred embodiment, the protrusion has at least one protrusion portion; when it is set as one protrusion portion, an insertion bevel is formed on the protrusion portion to make it easier to insert the protrusion into the mating cavity; when it is set as two or more protrusion portions, a groove is formed on the side where the protrusion contacts the mating cavity, and the groove is located between the two protrusion portions, wherein the protrusion close to the insertion end of the signal transmission module is formed with an insertion bevel.

[0015] A second object of the present invention is to provide an electrical connector, comprising a shielding structure as described in any one of the above items.

[0016] Beneficial effects

[0017] First, this solution is improved by using at least one independent shielding shell, each shielding shell only shielding a pair of differential pairs; at least one matching clip is set on each side wall of each shielding shell, and a grounding structure is set in the insulator on both sides of each differential pair. A plurality of matching clip holes are set on the grounding structure, and the insulator avoids the position of the matching clip holes; the matching clips on the shielding shell are installed in coordination with the matching clip holes on the grounding structure; this structure has a certain elastic deformation after installation, and the elastic clips are densely arranged, so the shielding structure is not easy to detach after installation.

[0018] Secondly, in order to further firmly fix the shielding shell, this solution provides a locking protrusion that cooperates with the shielding shell in the mating cavity. When the signal transmission module is assembled with the mating cavity, the locking protrusion presses against the shielding shell on the signal module. This not only achieves the abutment and fixation of the shielding shell to prevent it from loosening and the fluctuation of the spacing between the shielding shell and the differential pair wiring, but also achieves the overall fixation of the signal transmission module from the vertical direction of the top surface of the locking protrusion.

[0019] Third, in this solution, protrusions are provided on both sides of the insulator of the signal transmission module, and the protrusions form a strong interference fit with the inner walls on both sides of the mating cavity on the insulating shell, fixing the signal transmission module from both sides perpendicular to the locking protrusions. Therefore, the protrusion structure can fix the signal transmission module from different directions together with the locking protrusions in the mating cavity, and can better realize the plug-in connection between the signal transmission module and the mating cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a method for fixing the shielding structure of the signal transmission module in existing products;

[0022] Figure 2 for Figure 1 Partial schematic diagram of the shielding structure;

[0023] Figure 3 This is a schematic diagram of the shielding solution for existing products;

[0024] Figure 4 Schematic diagram of the installation of the shielding shell of the present invention;

[0025] Figure 5 It is a structural diagram of the shielding shell in the present invention;

[0026] Figure 6 It is a partial schematic diagram of the connection between the buckle and the hole;

[0027] Figure 7 This is a diagram showing the expansion and stagnation effect of the buckle;

[0028] Figure 8 It is a structural diagram of a buckle with an intermediate connecting section: a transition groove is provided;

[0029] Figure 9 This is a structural diagram of a buckle without an intermediate connecting section: no transition groove is provided;

[0030] Figure 10 This is a structural diagram of a buckle without an intermediate connecting section: a transition groove is provided;

[0031] Figure 11 Schematic diagram of the structure of the signal transmission module in the present invention;

[0032] Figure 12 for Figure 11 A magnified schematic diagram of point A in the middle;

[0033] Figure 13 Schematic diagram of card hole distribution;

[0034] Figure 14 for Figure 13 A magnified schematic diagram of point B in the middle;

[0035] Figure 15 This is a rendering of the signal transmission module after being inserted into the matching cavity;

[0036] Figure 16 Schematic diagram of the setting of the locking boss;

[0037] Figure 17 This is a diagram showing the contact between the positioning boss and the signal transmission module. Figure 1 ;

[0038] Figure 18 This is a diagram showing the contact between the positioning boss and the signal transmission module. Figure 2 ;

[0039] Figure 19 It is a schematic diagram of the raised strong interference installation;

[0040] Markings in the figure: 1. Shielding shell, 11. Shielding shell body, 12. Buckle, 121. First elastic arm, 122. Second elastic arm, 123. Middle connecting section, 124. Transition groove, 2. Signal transmission module, 21. Differential pair routing, 22. Insulator, 221. Avoidance hole, 23. Grounding piece, 231. Clamping hole, 24. Protrusion, 241. Protrusion, 242. Groove, 3. Insulating shell, 31. Matching cavity, 32. Clamping boss. DETAILED DESCRIPTION

[0041] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that elements, structures, and features in one embodiment may also be beneficially combined in other embodiments without further description.

[0042] It should be noted that: unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by persons having ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express a quantitative limitation, but rather indicate the presence of at least one. Words such as "include" or "comprise" indicate that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, but do not exclude other elements or objects with the same function.

[0043] like Figure 4 As shown, this embodiment provides a shielding structure, which includes at least one independent shielding shell 1, which is buckled on the end face of the signal transmission module 2, and each shielding shell 1 only shields a pair of differential pair traces 21; the signal transmission module 2 includes a differential pair trace 21, an insulator 22 and a grounding member 23, and the grounding member 23 is located in the insulator 22 and is arranged on both sides of the differential pair trace 21.

[0044] Reference Figure 5 The shielding shell 1 includes a shielding shell body 11 and a buckle 12. The two side walls of each shielding shell body 11 are provided with a buckle 12. There is at least one buckle 12 corresponding to each side of the shielding shell body 11. Figure 4 As shown, the buckles 12 of the shielding shell 1 are snap-fitted with the holes 231 of the grounding member 23. A grounding structure is provided within the insulator 22 on both sides of each differential pair 21. The grounding member 23 has corresponding holes 231 disposed thereon, mating with the buckles 12. The insulator 22 has relief holes 221 formed thereon to prevent the mating holes 231 from being positioned. The buckles 12 on the shielding shell 1 are mated with the holes 231 on the grounding member 23. After installation, the buckles 12 and holes 231 experience a certain degree of elastic deformation, and the dense arrangement of the elastic buckles 12 prevents the shielding shell 1 from being easily dislodged from the shielding position of the signal transmission module 2.

[0045] Reference Figure 6-10 As shown, the buckle 12 has the effect of shrinking inwards when inserted and expanding outwards to lock after being assembled into place. Specifically, it can adopt the following two structures.

[0046] The first structure includes two elastic arms arranged in parallel. The connecting ends of the first elastic arm 121 and the second elastic arm 122 are integrally connected to the shielding shell body 11. The insertion ends of the first elastic arm 121 and the second elastic arm 122 are not connected and form an elastic gap. Figure 9 and Figure 10 When the buckle 12 is inserted into the hole 231, the free ends of the first elastic arm 121 and the second elastic arm 122 are first passively squeezed and contracted inward, and then the two elastic arms are deformed in the direction away from each other under the action of their own elastic force, and come into contact with the hole 231, thereby achieving a locking fit between the buckle 12 and the edge of the hole 231.

[0047] The second structure: the buckle 12 is approximately U-shaped, including a first elastic arm 121, an intermediate connecting section 123, and a second elastic arm 122 connected in sequence, wherein the same end of the first elastic arm 121 and the second elastic arm 122 are connected to both sides of the shielding shell body 11, and the two ends of the intermediate connecting section 123 are respectively connected to the insertion ends of the first elastic arm 121 and the second elastic arm 122, and an elastic gap is formed between the first elastic arm 121, the intermediate connecting section 123, the second elastic arm 122 and the shielding shell body. The buckle 12 can be obtained by punching out the middle of a spring piece. For example Figure 7 and 8 When the buckle 12 is inserted into the card hole 231, this structure utilizes the principle that the middle sections of the first elastic arm 121 and the second elastic arm 122 are squeezed and deformed inward, so that the first elastic arm 121 and the second elastic arm 122 are deformed in the direction away from each other under the action of their own elastic force and come into contact with the card hole 231. Compared with the first structure, this structure includes the intermediate connecting section 123. By setting the intermediate connecting section 123, the abutment force of the first elastic arm 121 and the second elastic arm 122 against the edge of the card hole 231 when the deformation is restored after entering the card hole 231 is improved. At the same time, due to the support of the intermediate connecting section 123, when the buckle 12 is inserted into the card hole 231, the buckle 12 of the first structure is easier to insert, but the locking effect of the buckle 12 of the second structure is more reliable and firm.

[0048] In this embodiment, the buckle 12 can be matched with the clamping hole 231 in the following two ways: one way is that the minimum width of the outer edge of the buckle 12 is wider than the clamping hole 231, when the first elastic arm 121 and the second elastic arm 122 are clamped into the clamping hole 231, for the structure of the above-mentioned buckle 12, such as Figure 7 and 9The first elastic arm 121 and the second elastic arm 122 are squeezed and contracted in the approaching direction, relying on the first elastic arm 121 and the second elastic arm 122 to shrink inward as a whole and extend into the card hole 231, and under the action of the restoring elastic force of the first elastic arm 121 and the second elastic arm 122, that is, the buckle 12 first shrinks as a whole and extends into the card hole 231, and then the overall deformation recovers to achieve forced installation and stagnation with the card hole 231. The outer edge spacing of the buckle 12 is greater than the width of the card hole 231. The outer edge spacing refers to the spacing between the two opposite sides of the two elastic arms. The design requirement of this size is that after the buckle 12 and the card hole 231 are fitted and inserted, the two elastic arms rebound after being squeezed and tightly abut against the buckle 12, thereby achieving the clamping and fixing effect of the buckle 12 and the card hole 231.

[0049] Another way is: when the distance between the outer edge of the connecting end and the free end of the first elastic arm 121 and the second elastic arm 122 is greater than the width of the clamping hole 231, a transition groove 124 is formed in the middle section of the opposite sides of the first elastic arm 121 and the second elastic arm 122, for example Figure 8 and 10 The buckle 12 of this structure has an outer structure with large width at both ends and small width in the middle. The two elastic arms are used to cooperate with the card hole 231 on the back side. The free ends of the first elastic arm and the second elastic arm are first retracted inward and extended into the card hole 231. The buckle 12 is stuck in the card hole 231 by relying on the stop surface of the middle transition groove 124.

[0050] In this scheme, if Figure 15 、 16 , 17 and 18, a plurality of mating cavities 31 are provided on the insulating housing 3 of the electrical connector, and the mating cavity 31 is used to assemble the signal transmission module 2. The inner wall of each mating cavity 31 is provided with at least one positioning protrusion 32. Preferably, the cross section of the positioning protrusion 32 is rectangular, and its length direction extends along the depth direction of the mating cavity 31. When the signal transmission module 2 is assembled with the mating cavity 31, the end face of the positioning protrusion 32 can support the shielding shell 1 on the signal transmission module 2 to achieve a firm fixation of the shielding shell 1 from a first direction, as shown in FIG. Figure 16 As shown by the arrow at F, the first direction is perpendicular to the end surface of the locking boss 32 and points to the direction of the shielding shell 1; this method not only realizes the abutment and fixation of the shielding shell 1 to prevent it from loosening or fluctuation in the spacing with the differential pair wiring 21, but also realizes the overall fixation of the signal transmission module 2. Through the setting of the locking boss 32, the shielding shell 1 is subjected to an extrusion force to one side, preventing the shielding shell's buckle 12 from moving away from the clamping hole 231, so that the buckle 12 is firmly fixed in the opening of the clamping hole 231.

[0051] In this plan, refer to Figure 19At least one protrusion 24 is provided on each side of the signal transmission module 2 for securing the module 2. The protrusions 24 form a strong interference fit with the inner sidewalls of the mating cavity 31. This solution utilizes protrusions 24 extending from the sidewalls of the signal transmission module 2 to form a strong interference fit with the sidewalls of the mating cavity 31 on the housing, thereby securing the signal transmission module 2. Together with the retaining protrusions 32 within the mating cavity 31 on the insulating housing 3, they secure the signal transmission module 2 within the mating cavity 31.

[0052] Specifically, the protrusion 24 can adopt the following structure: each protrusion 24 is provided with one or more protrusions 241 along the insertion direction of the signal transmission module 2. The protrusions 241 are used to cooperate with the side walls of the mating cavity 31 on the housing to form a strong interference fit to fix the signal transmission module. When the protrusion 24 is provided with a single protrusion 241, the protrusion 241 forms a strong interference fit with the inner wall of the mating cavity 31. An insertion bevel is formed on the side of the protrusion 241 near the insertion end of the signal transmission module 2. When the protrusion 24 is provided with multiple protrusions 241, for example, the protrusion 24 has two protrusions 241, and a groove 242 is formed between the protrusion 1 and the protrusion 2. The insertion side of the protrusion 1 closer to the insertion end of the signal transmission module 2 has an insertion bevel, so that the protrusion 24 is more easily inserted into the mating cavity 31, and can be gradually locked during the inward insertion process. A groove 242 is formed between the two protrusions 241, which can effectively reduce the friction during insertion, thereby reducing the difficulty of insertion, and the two protrusions 241 can simultaneously form a double strong interference fit effect with the matching cavity 31. Compared with the structure with a single protrusion 241, it can make the firmness after insertion better. Similarly, three, four or more protrusions 241 can be set as needed.

[0053] In this embodiment, the locking boss 32 can fix the signal transmission module 2 in the first direction, and the strong interference effect of the protrusion 24 can fix the signal transmission module 2 in a direction perpendicular to the above-mentioned first direction. Since the protrusion 24 and the locking boss 32 fix the signal transmission module 2 from perpendicular directions, the protrusion 24 can, together with the locking boss 32 in the mating cavity 31, limit the position from three different directions, thereby better realizing the fixed connection between the signal transmission module 2 and the inner wall of the mating cavity 31.

[0054] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A shielding structure, characterized in that: The shielding shell comprises a signal transmission module and a shielding shell, wherein the shielding shell comprises a shielding shell body and a buckle, wherein the buckle is distributed on both sides of the shielding shell body, and at least one buckle is provided on each side, the signal transmission module comprises a differential pair of wiring and a grounding member, the grounding member is provided on both sides of the differential pair of wiring, and a clamping hole is provided on the grounding member to be connected with the buckle, the shielding shell and the grounding member are buckled together by the buckle and the clamping hole, the shielding shell is buckled on both sides of the differential pair of wiring, and each shielding shell only shields one pair of differential pair of wiring; the buckle is an elastic member, the buckle is snapped into the clamping hole, and the buckle and the clamping hole are elastically retracted to achieve a clamping connection; the buckle comprises a first elastic arm and a second elastic arm, both of which are connected to the shielding shell body, when the buckle is snapped into the clamping hole, the first elastic arm and the second elastic arm are squeezed by the clamping hole and approach each other, and when the buckle is snapped into the clamping hole, the first elastic arm and the second elastic arm are deformed in a direction away from each other to achieve a clamping connection; The outer edge spacing of the buckle is greater than the width of the clip hole; the insertion ends of the first elastic arm and the second elastic arm are not connected; the insertion ends of the first elastic arm and the second elastic arm are not connected and form a shrinkage gap, or the insertion ends of the first elastic arm and the second elastic arm are connected through an intermediate connecting section; a shrinkage gap is formed between the first elastic arm, the intermediate connecting section, the second elastic arm and the shielding shell body.

2. A shielding structure according to claim 1, characterized in that: It also includes an insulating shell, and the signal transmission module is inserted into the matching cavity of the insulating shell. At least one locking protrusion corresponding to the shielding shell is provided on the inner wall of the matching cavity. The locking protrusion is in contact with the outer end face of the shielding shell on the signal transmission module and is used to fix the signal transmission module from a first direction, which is a direction perpendicular to the end face of the locking protrusion.

3. The shielding structure according to claim 1, wherein: At least one protrusion is provided on each side of the signal transmission module, and the protrusion is used to form a strong interference fit with the inner wall of the matching cavity of the insulating shell to fix the signal transmission module.

4. The shielding structure according to claim 1, wherein: The device further comprises an insulating shell, wherein the signal transmission module is inserted into a matching cavity of the insulating shell, and an inner wall of the matching cavity is provided with at least one locking protrusion corresponding to the shielding shell, the locking protrusion abuts against the outer end surface of the shielding shell on the signal transmission module, and is used to fix the signal transmission module from a first direction; At least one protrusion is provided on each side of the signal transmission module, and the protrusion forms a strong interference fit with the inner side wall of the matching cavity, so as to fix the signal transmission module in a direction perpendicular to the first direction; The first direction is a direction perpendicular to the end surface against which the locking boss abuts.

5. A shielding structure according to claim 4, characterized in that: The protrusion has at least one raised portion; When a protrusion is provided, an insertion bevel is formed on the protrusion to make it easier to insert the protrusion into the matching cavity; When there are two or more protrusions, a groove is formed on the side of the protrusion that contacts the matching cavity. The groove is located between the two protrusions, and the protrusion close to the insertion end of the signal transmission module is formed with an insertion angle.

6. An electrical connector, characterized in that: The electrical connector includes a shielding structure according to any one of claims 1 to 5.

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