Three-tier terraced high-speed connector

Abstract

Disclosed in the present invention is a three-tier terraced high-speed connector, comprising a plug and a receptacle that mate with each other. When the plug and the receptacle are mated, and when plug contact members come into contact with receptacle contact members, second grounding elastic contacts overlap with a second upper shielding plate, third grounding elastic contacts overlap with a first shielding member, fourth grounding elastic contacts overlap with a first lower shielding plate, and first grounding elastic contacts overlap with a second shielding member. After the plug and the receptacle are mated, the plug contact members overlap with the receptacle contact members, externally protruding bumps abut against the inner side walls of the second shielding member, and internally protruding bumps abut against the outer side walls of the first shielding member. The present invention has the following beneficial effects: during the processes of mating and using the plug and the receptacle, differential-signal contact regions are all fully shielded and enclosed by rectangular cavities, thereby solving the problem of the high and low electrical-level difference on the ground; and during the entire plugging and unplugging process, the full shielding and enclosing remains intact, and all contact elastic contacts have a common-electrical-level characteristic at the same contact point.

Description

Three-tier terraced high-speed connector TECHNICAL FIELD

[0001] The present application relates to high-speed connector, in particular to three-tier terraced high-speed connector. BACKGROUND

[0002] At present, as high-speed connector, the limit tolerance of the inter-board insertion direction of the backplane connector is plus or minus 0.75mm, but as the high-speed connector develops to higher transmission speed, the limit tolerance of the inter-board insertion direction needs to be extended to 1.5mm, and when the high-speed backplane connector is inserted into place, the contact position of the earliest ground spring sheet of the existing backplane connector contacting the shielding element will be suspended, and when the application requirement of higher transmission speed is required, the crosstalk index cannot meet the use requirement. Moreover, the common level position between the signal left and right side ground or different spring sheets of the same ground position away from the contact area will also cause the crosstalk index to be unacceptable. The inventor has made many attempts, and even if different materials are used to realize the common level of all grounds, the actual effect is still not satisfactory. SUMMARY

[0003] The purpose of the present application is to overcome the shortcomings of the prior art and provide a three-tier terraced high-speed connector.

[0004] The purpose of the present application is achieved by the following technical scheme: a three-tier terraced high-speed connector, comprising a plug and a socket for insertion, the plug comprising a first shielding element, the first shielding element having an insertion end and a termination end, the insertion end of the first shielding element being in a U-shaped structure, the upper and lower parts of the termination end of the first shielding element being open, and the upper part of the termination end of the first shielding element being provided with a first upper shielding plate, and the lower part of the termination end of the first shielding element being provided with a first lower shielding plate, the first upper shielding plate, the termination end and the first lower shielding plate forming a rectangular cavity, a header plastic package frame being installed in the first shielding element, and a header contact being installed in the header plastic package frame, the first lower shielding plate being provided with a first ground elastic contact extending towards the insertion end, the end of the insertion end of the first shielding element being provided with a second ground elastic contact, the contact points of the header contact being located between the contact points of the first ground elastic contact and the contact points of the second ground elastic contact, the two outer side walls of the insertion end of the first shielding element being provided with outwardly convex convex hulls, the header contact extending out of the first ground elastic contact by at least 1.5mm, and the second ground elastic contact extending out of the header contact by at least 1mm.

[0005] The socket comprises a second shielding member having a mating end and a terminating end, the mating end of the second shielding member is in a U-shaped structure, the upper part and the lower part of the terminating end of the second shielding member are both open, the upper part of the terminating end of the second shielding member is provided with a second upper shielding plate, the lower part of the terminating end of the second shielding member is provided with a second lower shielding plate, the second upper shielding plate, the terminating end and the second lower shielding plate form a rectangular cavity, a seat plastic encapsulation frame is installed in the second shielding member, a seat contact is installed in the seat plastic encapsulation frame, a third grounding elastic contact extending to the mating end is arranged on the second upper shielding plate, a fourth grounding elastic contact is arranged on the end of the mating end of the second shielding member, the contact of the seat contact is located between the contact of the third grounding elastic contact and the contact of the fourth grounding elastic contact, an inwardly convex inner convex envelope is arranged on the inner side wall of the mating end of the second shielding member, the seat contact protrudes the third grounding elastic contact by at least 0.5 mm, and the fourth grounding elastic contact protrudes the seat contact by at least 1.5 mm.

[0006] When the plug and the socket are plugged together, the second grounding elastic contact is overlapped with the second upper shielding plate when the head contact is contacted with the seat contact, the third grounding elastic contact is overlapped with the first shielding member, the fourth grounding elastic contact is overlapped with the first lower shielding plate, and the first grounding elastic contact is overlapped with the second shielding member.

[0007] After the plug and the socket are plugged together, the head contact and the seat contact are overlapped, the outer convex envelope is abutted with the inner side wall of the second shielding member, and the inner convex envelope is abutted with the outer side wall of the first shielding member.

[0008] Optionally, the head plastic encapsulation frame comprises a plastic encapsulation end and a positioning end connected with each other, the connecting end of the head contact is plastic encapsulated in the plastic encapsulation end, the elastic end of the head contact is located outside the plastic encapsulation end, and the positioning end is fixedly installed in the U-shaped groove of the first shielding member.

[0009] Optionally, the plastic encapsulation end of the head plastic encapsulation frame is provided with an avoiding space corresponding to the first grounding elastic contact, the positioning end of the head plastic encapsulation frame is provided with an avoiding space corresponding to the head contact, and the positioning end of the head plastic encapsulation frame is further provided with an avoiding space corresponding to the second grounding elastic contact.

[0010] Optionally, the positioning end of the head plastic encapsulation frame is provided with a positioning column, a positioning hole is arranged in the U-shaped groove of the first shielding member, and the positioning column of the head plastic encapsulation frame is riveted in the positioning hole of the first shielding member.

[0011] Optionally, the seat plastic encapsulation frame comprises a plastic encapsulation end and a positioning end connected with each other, the seat contact is plastic encapsulated on the plastic encapsulation end of the seat plastic encapsulation frame, the contact of the seat contact is located outside the plastic encapsulation frame, and the positioning end is fixedly installed in the U-shaped groove of the second shielding member.

[0012] Optionally, the positioning end of the seat plastic encapsulation frame is provided with an avoiding space corresponding to the contact of the seat contact.

[0013] Optionally, a positioning column is arranged on the positioning end of the seat plastic sealing frame, a positioning hole is arranged in the U-shaped groove of the second shielding member, and the positioning column is riveted in the positioning hole.

[0014] Optionally, the end termination end of the second shielding member is in a stepped shape, and the stepped height close to the plug-in end is higher than the stepped height away from the plug-in end.

[0015] The present application has the following advantages:

[0016] 1. The three-layer terrace type high-speed connector, the plug and the socket are fully shielded by the rectangular cavity during the plugging and using process, thereby solving the problem of high and low level difference on the ground, and the full shielding package is still complete during the entire plugging process, and all the contact elastic contacts have the common level characteristic at the same contact point.

[0017] 2. The three-layer terrace type high-speed connector, the grounding elastic contact and the signal contact of the plug and the socket are in a three-layer terrace style, and the reference ground plane of the signal contact area is regular, and the regularity is not damaged during the plugging and unplugging process.

[0018] 3. During the plugging and using process of the plug and the socket, a closed conductive loop is formed between the second grounding elastic contact, the second upper shielding plate, the third grounding elastic contact and the first shielding member, and a closed loop is also formed between the fourth grounding elastic contact, the first lower shielding plate, the first grounding elastic contact and the second shielding member, thereby solving the problem of out-of-specification crosstalk caused by the "hanging" state between the third grounding elastic contact and the fourth grounding elastic contact and the first shielding member, thereby improving the signal crosstalk prevention capability of the connector and meeting the requirements of the high-speed connector on the signal crosstalk index. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a structural schematic view of the three-layer terrace type high-speed connector;

[0020] Fig. 2 is a sectional view of the three-layer terrace type high-speed connector;

[0021] Fig. 3 is a structural schematic view of the plug;

[0022] Fig. 4 is a structural schematic view of the plug;

[0023] Fig. 5 is a sectional view of the plug;

[0024] Fig. 6 is a structural schematic view of the socket;

[0025] Fig. 7 is a sectional view of the socket;

[0026] In the figure, 100 - plug, 200 - socket, 101 - first shielding member, 102 - first lower shielding plate, 103 - first upper shielding plate, 104 - header plastic package frame, 105 - header contact, 106 - first grounding elastic contact, 107 - outer convex bump, 108 - first positioning member, 108 - second grounding elastic contact, 201 - second shielding member, 202 - second upper shielding plate, 203 - second lower shielding plate, 204 - socket contact, 205 - socket plastic package frame, 206 - third grounding elastic contact, 207 - fourth grounding elastic contact, 208 - inner convex bump. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0029] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0030] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present application, it is also necessary to point out that, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0033] As shown in FIG. 1 and FIG. 2, the three-layer terrace type high-speed connector includes a plug 100 and a socket 200, as shown in FIG. 3, FIG. 4 and FIG. 5, the plug 100 includes a first shielding member 101, the first shielding member 101 has a plug-in end and a termination end, in this embodiment, the plug-in end of the first shielding member 101 is at the left end of the first shielding member 101, and the termination end of the first shielding member 101 is at the right end of the first shielding member 101, the plug-in end of the first shielding member 101 is in a U-shaped structure, the upper and lower parts of the termination end of the first shielding member 101 are both open, and the upper part of the termination end of the first shielding member 101 is provided with a first upper shielding plate 103, and the lower part of the termination end of the first shielding member 101 is provided with a first lower shielding plate 102, the first upper shielding plate 103, the termination end and the first lower shielding plate 102 form a rectangular cavity, in this embodiment, the rectangular cavity can wrap a differential signal pair, thereby reducing the signal crosstalk of the differential signal, a header plastic package frame 104 is installed in the first shielding member 101, a header contact 105 is installed in the header plastic package frame 104, and the header contact 105 is a differential signal pair, a first grounding elastic contact 106 extending to the plug-in end is arranged on the first lower shielding plate 102, and a second grounding elastic contact 108 is arranged at the end of the plug-in end of the first shielding member 101, the contact points of the header contact 105 are located between the contact points of the first grounding elastic contact 106 and the second grounding elastic contact 108, that is, the first grounding elastic contact 106, the header contact 105 and the second grounding elastic contact 108 have gaps between each other in the vertical direction, while in the axial direction, the first grounding elastic contact 106, the header contact 105 and the second grounding elastic contact 108 are distributed staggered, thereby making the distribution of the first grounding elastic contact 106, the header contact 105 and the second grounding elastic contact 108 in a three-layer terrace type structure.

[0034] In the embodiment, as shown in FIG. 6 and FIG. 7, the socket 200 comprises a second shielding member 201 having a mating end and a terminating end, the mating end of the second shielding member 201 is in a U-shaped structure, in the embodiment, the mating end of the second shielding member 201 is located at the left end of the second shielding member 201, while the terminating end of the second shielding member 201 is located at the right end of the second shielding member 201, the upper part and the lower part of the terminating end of the second shielding member 201 are both open, the upper part of the terminating end of the second shielding member 201 is provided with a second upper shielding plate 202, the lower part of the terminating end of the second shielding member 201 is provided with a second lower shielding plate 203, the second upper shielding plate 202, the terminating end and the second lower shielding plate 203 form a rectangular cavity, a seat plastic package frame 205 is installed in the second shielding member 201, and a seat contact 204 is installed in the seat plastic package frame 205, in the embodiment, the seat contact 204 is also a differential signal pair, the rectangular cavity of the socket 200 can wrap the differential signal pair, thereby reducing the signal crosstalk of the differential signal, further, the second upper shielding plate 202 is provided with a third grounding elastic contact 206 extending to the mating end, the end of the mating end of the second shielding member 201 is provided with a fourth grounding elastic contact 207, the contact of the seat contact 204 is located between the contact of the third grounding elastic contact 206 and the contact of the fourth grounding elastic contact 207, that is, the third grounding elastic contact 206, the seat contact 204 and the fourth grounding elastic contact 207 have gaps between each other in the vertical direction, while in the axial direction, the third grounding elastic contact 206, the seat contact 204 and the fourth grounding elastic contact 207 are distributed staggered, thereby making the distribution of the third grounding elastic contact 206, the seat contact 204 and the fourth grounding elastic contact 207 in a three-layer terrace structure.

[0035] In the embodiment, as shown in FIG. 2, when the plug 100 and the socket 200 are plugged together, when the head contact 105 contacts the seat contact 204, the second grounding elastic contact head is overlapped with the second upper shielding plate 202, the third grounding elastic contact head 206 is overlapped with the first shielding member 101, the fourth grounding elastic contact head 207 is overlapped with the first lower shielding plate 102, and the first grounding elastic contact head 106 is overlapped with the second shielding member 201, thus when the head contact 105 contacts the seat contact 204, the first shielding member 101 and the second shielding member 201 have good shielding effect, and the signal crosstalk between the differential signal pairs is reduced. Further, the head contact 105 extends out of the first grounding elastic contact head 106 by at least 1.5 mm, as shown in A of FIG. 5, the second grounding elastic contact head 108 extends out of the head contact 105 by at least 1 mm, as shown in B of FIG. 5, the seat contact 204 extends out of the third grounding elastic contact head 206 by at least 0.5 mm, as shown in C of FIG. 7, and the fourth grounding elastic contact head 207 extends out of the seat contact 204 by at least 1.5 mm, as shown in D of FIG. 7, that is, the first shielding member 101 and the second shielding member 201 have a scraping distance of at least 1.5 mm during the plugging process of the plug 100 and the socket 200, thus the overlapping performance of the first shielding member 101 and the second shielding member 201 is ensured, and thus the shielding effect of the connector is ensured.

[0036] In the embodiment, as shown in FIG. 3 and FIG. 4, in order to ensure the overlapping performance of the first shielding member 101 and the second shielding member 201, the two outer side walls of the plugging end of the first shielding member 101 are provided with outward convex convexes 107, as shown in FIG. 6, and the inner side wall of the plugging end of the second shielding member 201 is provided with an inward convex convex 208. In the embodiment, the plug 100 is a contained member, and the socket 200 is a containing member. During the plugging process of the plug 100 and the socket 200, after the plugging end of the first shielding member 101 enters into the plugging end of the second shielding member 201, the outward convex convexes 107 abut against the inner side wall of the second shielding member 201, and the inward convex convex 208 abuts against the outer side wall of the first shielding member 101. After the plug 100 and the socket 200 are plugged together, the head contact 105 and the seat contact 204 are overlapped, and the outward convex convexes 107 abut against the inner side wall of the second shielding member 201, and the inward convex convex 208 abuts against the outer side wall of the first shielding member 101, thus the connector can form a rectangular shielding cavity from left to right, and thus the differential signal pairs of the plug 100 and the socket 200 are surrounded by the rectangular shielding cavity, and the problem of high and low level difference on the ground is solved. The full shielding wrapping is still complete during the whole plugging process, and all the grounding elastic contact heads have the same level characteristic at the same contact point, thus the connector has good shielding performance during the plugging and using process of the plug 100 and the socket 200, and the signal crosstalk is reduced.

[0037] Since the scraping distance between the first shielding member 101 and the second shielding member 201 is at least 1.5 mm, the third grounding elastic contact 206 and the fourth grounding elastic contact 207 are in a "suspended" state with the first shielding member 101, which will cause the crosstalk index to be unacceptable when facing the higher transmission speed application requirement, and the common level position of the signal left and right ground or different elastic sheets at the same ground position is far away from the contact area, which will also cause the crosstalk index to be unacceptable. In the embodiment, during the insertion process of the plug 100 and the socket 200, due to the arrangement of the second grounding elastic contact 108 and the first grounding elastic contact 106, when the head contact 105 and the seat contact 204 have not been contacted, the second grounding elastic contact head is overlapped with the second upper shielding plate 202, the third grounding elastic contact 206 is overlapped with the first shielding member 101, and the fourth grounding elastic contact 207 is overlapped with the first lower shielding plate 102, and the first grounding elastic contact 106 is overlapped with the second shielding member 201, so that a closed conductive loop is formed between the second grounding elastic contact head, the second upper shielding plate 202, the third grounding elastic contact 206, and the first shielding member 101. At the same time, a closed loop is also formed between the fourth grounding elastic contact 207, the first lower shielding plate 102, the first grounding elastic contact 106, and the second shielding member 201, thereby solving the problem of the substandard crosstalk index caused by the "suspended" state between the third grounding elastic contact 206 and the fourth grounding elastic contact 207 and the first shielding member 101, and improving the ability of the connector to prevent signal crosstalk, thereby meeting the requirements of high-speed connectors on signal crosstalk index.

[0038] In the embodiment, the head plastic encapsulation frame 104 includes a plastic encapsulation end and a positioning end connected with each other, the connection end of the head contact 105 is plastic encapsulated in the plastic encapsulation end, the elastic end of the head contact 105 is located outside the plastic encapsulation end, and the positioning end is fixedly installed in the U-shaped groove of the first shielding member 101. In the embodiment, the plastic encapsulation end and the positioning end of the head plastic encapsulation frame 104 can be integrally formed or separately formed. In order to reduce the manufacturing difficulty of the head plastic encapsulation frame 104, preferably, the plastic encapsulation end and the positioning end of the head plastic encapsulation frame 104 are separately formed, the head contact 105 is first plastic encapsulated in the head plastic encapsulation frame 104, and then the positioning block is injection molded, and then the plastic encapsulation end and the positioning end of the head plastic encapsulation frame 104 are assembled together. Further, the plastic encapsulation end and the positioning end of the head plastic encapsulation frame 104 can be hot fusion welded or buckled. If the buckling structure is adopted, a buckling hole is formed on the plastic encapsulation end, and an elastic buckling block is arranged on the positioning end.

[0039] In the embodiment, the seat plastic package frame 205 comprises a plastic package end and a positioning end connected with each other, the seat contact 204 is plastic packaged on the plastic package end of the seat plastic package frame 205, and the contact of the seat contact 204 is located outside the plastic package frame. The positioning end is fixedly installed in the U-shaped groove of the second shielding member 201. Similarly, the plastic package end and the positioning end of the seat plastic package frame 205 can be integrally formed or separately formed. In order to reduce the manufacturing difficulty of the seat plastic package frame 205, preferably, the plastic package end and the positioning end of the seat plastic package frame 205 are separately formed. The seat contact 204 is first plastic packaged in the seat plastic package frame 205, and then the positioning block is injection molded. After that, the plastic package end and the positioning end of the seat plastic package frame 205 are assembled together. Further, the plastic package end and the positioning end of the seat plastic package frame 205 can be hot fusion welded or buckled. If the buckling structure is adopted, the buckle hole is formed on the plastic package end, and the elastic buckle block is arranged on the positioning end.

[0040] In the embodiment, the plastic package end of the head plastic package frame 104 is provided with an avoiding space corresponding to the first grounding elastic contact 106. The positioning end of the head plastic package frame 104 is provided with an avoiding space corresponding to the head contact 105. The positioning end of the head plastic package frame 104 is further provided with an avoiding space corresponding to the second grounding elastic contact 108. The positioning end of the seat plastic package frame 205 is provided with an avoiding space corresponding to the contact of the seat contact 204. Through the avoiding space, the deformation of the corresponding contact and the elastic contact can be adapted, and the occupied space of the connector is reduced, so that the connector is miniaturized and high-density.

[0041] In the embodiment, the positioning end of the head plastic package frame 104 is provided with a positioning column. The U-shaped groove of the first shielding member 101 is provided with a positioning hole. The positioning column on the head plastic package frame 104 is riveted in the positioning hole of the first shielding member 101. Similarly, the positioning end of the seat plastic package frame 205 is provided with a positioning column. The U-shaped groove of the second shielding member 201 is provided with a positioning hole. The positioning column is riveted in the positioning hole. Through the riveting of the positioning column and the positioning hole, the installation reliability of the head plastic package frame 104 and the seat plastic package frame 205 is ensured.

[0042] In the embodiment, the end connection end of the second shielding member 201 is in a stepped shape. The height of the step close to the plug-in end is higher than the height of the step away from the plug-in end. Thus, the second shielding member 201 has a containing space, which is convenient for containing the plug-in end of the plug 100.

[0043] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can modify the technical solutions recorded in the foregoing embodiments or replace some of the technical features equivalently without departing from the spirit and principle of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A three-tiered terraced high speed connector comprising a mating plug and receptacle, characterized by: The plug comprises a first shielding member having a mating end and a terminating end, the mating end of the first shielding member is in U-shaped structure, the upper part and the lower part of the terminating end of the first shielding member are both open, the upper part of the terminating end of the first shielding member is provided with a first upper shielding plate, the lower part of the terminating end of the first shielding member is provided with a first lower shielding plate, the first upper shielding plate, the terminating end and the first lower shielding plate form a rectangular cavity, a header plastic package frame is installed in the first shielding member, a header contact is installed in the header plastic package frame, the first lower shielding plate is provided with a first grounding elastic contact extending to the mating end, the end of the mating end of the first shielding member is provided with a second grounding elastic contact, the contact point of the header contact is between the contact point of the first grounding elastic contact and the contact point of the second grounding elastic contact, the two outer side walls of the mating end of the first shielding member are provided with outward convex convex hulls, the header contact extends out of the first grounding elastic contact by at least 1.5 mm, the second grounding elastic contact extends out of the header contact by at least 1 mm; the socket comprises a second shielding member having a mating end and a terminating end, the mating end of the second shielding member is in U-shaped structure, the upper part and the lower part of the terminating end of the second shielding member are both open, the upper part of the terminating end of the second shielding member is provided with a second upper shielding plate, the lower part of the terminating end of the second shielding member is provided with a second lower shielding plate, the second upper shielding plate, the terminating end and the second lower shielding plate form a rectangular cavity, a seat plastic package frame is installed in the second shielding member, a seat contact is installed in the seat plastic package frame, the second upper shielding plate is provided with a third grounding elastic contact extending to the mating end, the end of the mating end of the second shielding member is provided with a fourth grounding elastic contact, the contact point of the seat contact is between the contact point of the third grounding elastic contact and the contact point of the fourth grounding elastic contact, the inner side wall of the mating end of the second shielding member is provided with an inward convex convex hull, the seat contact extends out of the third grounding elastic contact by at least 0.5 mm, the fourth grounding elastic contact extends out of the seat contact by at least 1.5 mm; when the plug and the socket are plugged together, when the header contact contacts the seat contact, the second grounding elastic contact overlaps the second upper shielding plate, the third grounding elastic contact overlaps the first shielding member, the fourth grounding elastic contact overlaps the first lower shielding plate, and the first grounding elastic contact overlaps the second shielding member; after the plug and the socket are plugged together, the header contact and the seat contact overlap, the outward convex convex hull abuts against the inner side wall of the second shielding member, and the inward convex convex hull abuts against the outer side wall of the first shielding member.

2. The three-tiered terraced high speed connector of claim 1, wherein: The header plastic package frame comprises a plastic package end and a positioning end connected together, the connecting end of the header contact is plastic packaged in the plastic package end, and the elastic end of the header contact is located outside the plastic package end, and the positioning end is fixedly installed in the U-shaped groove of the first shielding member.

3. The three-tiered terraced high speed connector of claim 2, wherein: The plastic sealing end of the head plastic sealing frame is provided with an avoiding space corresponding to the first grounding elastic contact, the positioning end of the head plastic sealing frame is provided with an avoiding space corresponding to the head contact, and the positioning end of the head plastic sealing frame is further provided with an avoiding space corresponding to the second grounding elastic contact.

4. The three-tiered terraced high speed connector of claim 3, wherein: The positioning end of the head plastic sealing frame is provided with a positioning column, the U-shaped groove of the first shielding member is provided with a positioning hole, and the positioning column on the head plastic sealing frame is riveted in the positioning hole of the first shielding member.

5. The three-tiered terraced high speed connector of any of claims 1-4, wherein: The seat plastic sealing frame comprises a plastic sealing end and a positioning end connected with each other, the seat contact is plastic sealed on the plastic sealing end of the seat plastic sealing frame, and the contact of the seat contact is located on the outer side of the plastic sealing frame, and the positioning end is fixedly installed in the U-shaped groove of the second shielding member.

6. The three-tiered terraced high speed connector of claim 5, wherein: The positioning end of the seat plastic sealing frame is provided with an avoiding space corresponding to the contact of the seat contact.

7. The three-tiered terraced high speed connector of claim 5, wherein: The positioning end of the seat plastic sealing frame is provided with a positioning column, the U-shaped groove of the second shielding member is provided with a positioning hole, and the positioning column is riveted in the positioning hole.

8. The three-tiered terraced high speed connector of claim 5, wherein: The end connecting end of the second shielding member is in a stepped shape, and the height of the step close to the plug-in end is higher than the height of the step away from the plug-in end.

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