Three-layer terrace type plug
By adopting a three-layer terraced plug design in the high-speed connector, the problems of insufficient tolerance to the inter-plate inter-plate plug direction and the failure of signal crosstalk indicators in the prior art are solved, and good signal quality and low crosstalk performance at higher transmission speeds are achieved.
Patent Information
- Application Number
- CN202422193508.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-06
AI Technical Summary
When existing high-speed backplane connectors are used for higher speed transmission speeds, the limit tolerance of the inter-board plug-in direction is insufficient, resulting in the signal crosstalk index not meeting the standards, and the problem of suspending the grounding shrapnel cannot meet the higher transmission speed requirements.
The three-layer terraced plug design is adopted, including the first shielding part, the head plastic sealing frame and the ground elastic contact. Through the rectangular cavity and a fully shielded wrap structure, the reference ground plane regularity of the signal contact area is ensured, and the complete fully shielded wrap is maintained during the plug-in and unplugging process.
It effectively reduces the signal crosstalk of differential signals, ensures signal quality at higher transmission speeds, and meets higher signal crosstalk index requirements.
Smart Images
Figure CN223007096U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-speed connector, in particular to a three-layer terraced plug. Background Art
[0002] At present, as a high-speed connector, the ultimate tolerance in the board-to-board mating direction of a backplane connector is plus or minus 0.75 mm. However, with the development of high-speed connectors towards higher transmission speeds, the ultimate tolerance in the board-to-board mating direction needs to be extended, and a scraping insertion distance of 1.5 mm is required. After the high-speed backplane connector is inserted in place, for the existing backplane connector, the contact position between the grounding spring piece that first contacts the shielding member and the shielding member will be suspended. When facing the application requirements of higher transmission speeds, its crosstalk index cannot meet the usage requirements. Moreover, the crosstalk index is unacceptable when the grounds on the left and right sides of the signal or the common level positions between different spring pieces at the same grounding position are far from the contact area.
[0003] After many attempts by the inventor, even when using different materials to achieve the common level of all grounds, the actual effect is still not satisfactory. After long-term research, the inventor proposed a three-layer terraced high-speed connector and made improvements to both the plug and the socket. Summary of the Utility Model
[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a three-layer terraced plug.
[0005] The purpose of the utility model is achieved by the following technical solutions: A three-layer terraced plug, including a first shielding member, the first shielding member having a mating end and a termination end. The mating end of the first shielding member is in a U-shaped structure. The upper and lower parts of the termination end of the first shielding member are both open mouths. A first upper shielding plate is installed on the upper part of the termination end of the first shielding member, and a first lower shielding plate is installed on the lower part of the termination end of the first shielding member. The first upper shielding plate, the termination end, and the first lower shielding plate form a rectangular cavity. A head plastic sealing frame is installed inside the first shielding member, and a head contact member is installed inside the head plastic sealing frame. A first grounding elastic contact extending towards the mating end is provided on the first upper shielding plate. A second grounding elastic contact is provided at the end of the mating end of the first shielding member. The contact points of the head contact member are located between the contact points of the first grounding elastic contact and the contact points of the second grounding elastic contact. Outer convex bumps protruding outwards are provided on the two outer side walls of the mating end of the first shielding member.
[0006] Optionally, the head plastic sealing frame includes a plastic sealing end and a positioning end connected to each other. The connecting end of the head contact member is plastic-sealed inside the plastic sealing end, the elastic end of the head contact member is located outside the plastic sealing end, and the positioning end is fixedly installed in the U-shaped groove of the first shielding member.
[0007] Optionally, an avoidance space corresponding to the first ground elastic contact is provided on the encapsulation end of the head encapsulation frame, an avoidance space corresponding to the head contact is provided on the positioning end of the head encapsulation frame, and an avoidance space corresponding to the second ground elastic contact is further provided on the positioning end of the head encapsulation frame.
[0008] Optionally, positioning posts are provided on the positioning end of the head encapsulation frame, positioning holes are provided in the U-shaped grooves of the first shielding member, and the positioning posts are riveted in the positioning holes.
[0009] Optionally, the head contact extends at least 1.5 mm beyond the first ground elastic contact.
[0010] Optionally, the second ground elastic contact extends at least 1 mm beyond the head contact.
[0011] The utility model has the following advantages: For the three-layer terraced plug of the utility model, the ground elastic contacts and signal contacts of the plug are in a three-layer terraced style, and the reference ground plane of the signal contact area is regular and will not be damaged during the plugging and unplugging process. During the plugging process with the socket and during the cooperation process, the differential signal contact area is fully shielded and wrapped by a rectangular cavity, thus solving the problem of high and low level differences on the ground. During the entire plugging and unplugging process, this full shielding and wrapping remains intact, and all contact elastic contacts have the co-level characteristic at the same contact point. Description of the Drawings
[0012] Figure 1 is a schematic structural diagram of a three-layer terraced high-speed connector;
[0013] Figure 2 is a schematic cross-sectional view of a three-layer terraced high-speed connector;
[0014] Figure 3 is a schematic structural diagram of the plug Figure 1 ;
[0015] Figure 4 is a schematic structural diagram of the plug Figure 2 ;
[0016] Figure 5 is a cross-sectional view of the plug;
[0017] Figure 6 is a schematic structural diagram of the socket;
[0018] Figure 7 is a schematic cross-sectional view of the socket;
[0019] In the figure, 100 - plug, 200 - socket, 101 - first shielding member, 102 - first lower shielding plate, 103 - first upper shielding plate, 104 - head plastic - sealed frame, 105 - head contact, 106 - first grounding elastic contact, 107 - outward 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 - sealed frame, 206 - third grounding elastic contact, 207 - fourth grounding elastic contact, 208 - inward convex bump. Detailed implementation manners
[0020] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.
[0022] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.
[0023] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.
[0025] In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0026] As Figure 1 and Figure 2 shown, a three-layer terraced high-speed connector includes a plug 100 and a socket 200 that are inserted into each other. As Figure 3 , Figure 4 and Figure 5 shown, the plug 100 includes a first shielding member 101. The first shielding member 101 has an insertion end and a termination end. In this embodiment, the insertion end of the first shielding member 101 is at the left end of the first shielding member 101, while the termination end of the first shielding member 101 is located at the right end of the first shielding member 101. The insertion end of the first shielding member 101 has a U-shaped structure. The upper and lower parts of the termination end of the first shielding member 101 are both open, and a first upper shielding plate 103 is installed on the upper part of the termination end of the first shielding member 101, and a first lower shielding plate 102 is installed on the lower part of the termination end of the first shielding member 101. 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 the differential signal pair, thereby reducing the signal crosstalk of the differential signal. A head plastic sealing frame 104 is installed inside the first shielding member 101, and a head contact 105 is installed inside the head plastic sealing frame 104. The head contact 105 is a differential signal pair. A first grounding elastic contact 106 extending towards the insertion end is provided on the first lower shielding plate 102, and a second grounding elastic contact 108 is provided at the end of the insertion end of the first shielding member 101. The contact points of the head contact 105 are located between the contact points of the first grounding elastic contact 106 and the contact points of the second grounding elastic contact 108. That is to say, there are gaps between the first grounding elastic contact 106, the head contact 105, and the second grounding elastic contact 108 in the vertical direction, and in the axial direction, the first grounding elastic contact 106, the head contact 105, and the second grounding elastic contact 108 are staggered, so that the distribution of the first grounding elastic contact 106, the head contact 105, and the second grounding elastic contact 108 presents a three-layer terraced structure.
[0027] In this embodiment, as Figure 6 and Figure 7As shown, the socket 200 includes a second shielding member 201. The second shielding member 201 has a mating end and a termination end. The mating end of the second shielding member 201 has a U-shaped structure. In this embodiment, the mating end of the second shielding member 201 is located at the left end of the second shielding member 201, while the termination end of the second shielding member 201 is located at the right end of the second shielding member 201. Both the upper and lower parts of the termination end of the second shielding member 201 are open. A second upper shielding plate 202 is installed on the upper part of the termination end of the second shielding member 201, and a second lower shielding plate 203 is installed on the lower part of the termination end of the second shielding member 201. The second upper shielding plate 202, the termination end, and the second lower shielding plate 203 form a rectangular cavity. A socket plastic encapsulation frame 205 is installed inside the second shielding member 201, and a socket contact member 204 is installed inside the socket plastic encapsulation frame 205. In this embodiment, the socket contact member 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, a third grounding elastic contact 206 extending towards the mating end is provided on the second upper shielding plate 202, and a fourth grounding elastic contact 207 is provided at the end of the mating end of the second shielding member 201. The contact point of the socket contact member 204 is located between the contact points of the third grounding elastic contact 206 and the fourth grounding elastic contact 207. That is to say, there are gaps between the third grounding elastic contact 206, the socket contact member 204, and the fourth grounding elastic contact 207 in the vertical direction, and in the axial direction, the third grounding elastic contact 206, the socket contact member 204, and the fourth grounding elastic contact 207 are staggered, so that the distribution of the third grounding elastic contact 206, the socket contact member 204, and the fourth grounding elastic contact 207 presents a three-layer terraced structure.
[0028] In this embodiment, as Figure 2 shown, when the plug 100 and the socket 200 are plugged together, when the head contact member 105 contacts the socket contact member 204, the second grounding elastic contact head laps with the second upper shielding plate 202, the third grounding elastic contact 206 laps with the first shielding member 101, the fourth grounding elastic contact 207 laps with the first lower shielding plate 102, and the first grounding elastic contact 106 laps with the second shielding member 201. Therefore, when the head contact member 105 contacts the socket contact member 204, the first shielding member 101 and the second shielding member 201 have a good shielding effect, reducing the signal crosstalk between the differential signal pairs. Further, the head contact member 105 extends at least 1.5 mm beyond the first grounding elastic contact 106, as Figure 5 shown at A in Figure 5 ; the second grounding elastic contact 108 extends at least 1 mm beyond the head contact member 105, as Figure 7 shown at B inFigure 7 As shown in D, that is to say, during the mating process of the plug 100 and the socket 200, there is a scraping and mating distance of at least 1.5 mm between the first shielding member 101 and the second shielding member 201, thereby ensuring the lapping performance of the first shielding member 101 and the second shielding member 201, and thus ensuring the shielding effect of the connector.
[0029] In this embodiment, as Figure 3 and Figure 4 shown, to ensure the lapping performance of the first shielding member 101 and the second shielding member 201, outwardly protruding outer convex bumps 107 are provided on the two outer side walls of the mating end of the first shielding member 101. As Figure 6 shown, inwardly protruding inner convex bumps 208 are provided on the inner side wall of the mating end of the second shielding member 201. In this embodiment, the plug 100 is the member to be accommodated, and the socket 200 is the accommodating member. During the mating process of the plug 100 and the socket 200, after the mating end of the first shielding member 101 enters the mating end of the second shielding member 201, the outer convex bumps 107 abut against the inner side wall of the second shielding member 201, and the inner convex bumps 208 abut against the outer side wall of the first shielding member 101. After the plug 100 and the socket 200 are fully mated, the pin contact member 105 and the socket contact member 204 are lapped, and the outer convex bumps 107 abut against the inner side wall of the second shielding member 201, and the inner convex bumps 208 abut against the outer side wall of the first shielding member 101. Therefore, the connector can form a rectangular shielding cavity from left to right, so that the differential signal pair of the plug 100 and the socket 200 is surrounded by the rectangular shielding cavity, solving the problem of high and low level differences on the ground. During the entire plugging and unplugging process, this full shielding package remains intact, and all grounding elastic contacts have the co-level characteristic at the same contact point. Therefore, during the mating and use process of the plug 100 and the socket 200, the connector has good shielding performance and reduces signal crosstalk.
[0030] Since there is a scraping and insertion distance of at least 1.5 mm between the first shielding member 101 and the second shielding member 201, the third grounding elastic contact 206 and the fourth grounding elastic contact 207 will be in a "floating" state with respect to the first shielding member 101. When facing higher transmission speed application requirements, their crosstalk indexes will become unacceptable. Moreover, grounding on both sides of the signal or the common level position between different elastic pieces at the same grounding position being far from the contact area will also result in unacceptable crosstalk indexes. In this embodiment, during the mating process of the plug 100 and the socket 200, due to the provision of the second grounding elastic contact 108 and the first grounding elastic contact 106, before the head contact member 105 and the socket contact member 204 come into contact, the second grounding elastic contact head overlaps with the second upper shielding plate 202, the third grounding elastic contact 206 overlaps with the first shielding member 101, and the fourth grounding elastic contact 207 overlaps with the first lower shielding plate 102, and the first grounding elastic contact 106 overlaps with the second shielding member 201. Therefore, a closed conductive loop will be 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 will also be 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, the problem of unqualified crosstalk indexes caused by the "floating" state between the third grounding elastic contact 206 and the fourth grounding elastic contact 207 with respect to the first shielding member 101 can be solved, and thus the signal crosstalk prevention ability of the connector is improved, meeting the requirements of high-speed connectors for signal crosstalk indexes.
[0031] In this embodiment, the head plastic encapsulation frame 104 includes a plastic encapsulation end and a positioning end connected to each other. The connecting end of the head contact member 105 is plastic encapsulated within the plastic encapsulation end, and the elastic end of the head contact member 105 is located outside the plastic encapsulation end. The positioning end is fixedly installed within the U-shaped groove of the first shielding member 101. In this embodiment, the plastic encapsulation end and the positioning end of the head plastic encapsulation frame 104 can be integrally formed or separately formed. 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. First, the head contact member 105 is plastic encapsulated within the head plastic encapsulation frame 104, and after the positioning block is injection molded, 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 joined by thermal fusion welding or by a snap-fit structure. If a snap-fit structure is adopted, snap holes are provided on the plastic encapsulation end, and elastic snap blocks are provided on the positioning end.
[0032] In this embodiment, the socket plastic encapsulation frame 205 includes a plastic encapsulation end and a positioning end that are connected to each other. The socket contact 204 is plastic encapsulated on the plastic encapsulation end of the socket plastic encapsulation frame 205, and the contacts of the socket contact 204 are located outside the plastic encapsulation frame. The positioning end is fixedly installed in the U-shaped groove of the second shielding member 201. Similarly, the plastic encapsulation end and the positioning end of the socket plastic encapsulation frame 205 can be integrally formed or separately formed. To reduce the manufacturing difficulty of the socket plastic encapsulation frame 205, preferably, the plastic encapsulation end and the positioning end of the socket plastic encapsulation frame 205 are separately formed. First, the socket contact 204 is plastic encapsulated in the socket plastic encapsulation frame 205, and after the positioning block is injection molded, then the plastic encapsulation end and the positioning end of the socket plastic encapsulation frame 205 are assembled together. Further, a thermal fusion welding or a snap connection structure can be adopted between the plastic encapsulation end and the positioning end of the socket plastic encapsulation frame 205. If a snap connection structure is adopted, snap holes are opened on the plastic encapsulation end, and elastic snap blocks are provided on the positioning end.
[0033] In this embodiment, an avoidance space corresponding to the first grounding elastic contact 106 is opened on the plastic encapsulation end of the head plastic encapsulation frame 104. An avoidance space corresponding to the head contact 105 is opened on the positioning end of the head plastic encapsulation frame 104, and an avoidance space corresponding to the second grounding elastic contact 108 is also opened on the positioning end of the head plastic encapsulation frame 104. An avoidance space corresponding to the contacts of the socket contact 204 is opened on the positioning end of the socket plastic encapsulation frame 205. Through the avoidance space, the deformation of the corresponding contacts and elastic contacts can be adapted, thereby reducing the occupied space of the connector and making the connector miniaturized and highly dense.
[0034] In this embodiment, positioning posts are provided on the positioning end of the head plastic encapsulation frame 104, and positioning holes are opened in the U-shaped groove of the first shielding member 101. The positioning posts on the head plastic encapsulation frame 104 are riveted in the positioning holes of the first shielding member 101. Similarly, positioning posts are provided on the positioning end of the socket plastic encapsulation frame 205, and positioning holes are opened in the U-shaped groove of the second shielding member 201. The positioning posts are riveted in the positioning holes. Through the riveting of the positioning posts and the positioning holes, the installation reliability of the head plastic encapsulation frame 104 and the socket plastic encapsulation frame 205 is ensured.
[0035] In this embodiment, the termination end of the second shielding member 201 is in a stepped shape, and the step height near the mating end is higher than the step height far from the mating end, thereby forming an accommodation space on the second shielding member 201, which is convenient for accommodating the mating end of the plug 100.
[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. Three-layer terraced plug, characterized by: The invention comprises a first shielding member, wherein the first shielding member has a plug-in end and a terminal end, the plug-in end of the first shielding member is in a U-shaped structure, the upper and lower parts of the terminal end of the first shielding member are both open, and a first upper shielding plate is installed on the upper part of the terminal end of the first shielding member, and a first lower shielding plate is installed on the lower part of the terminal end of the first shielding member, the first upper shielding plate, the terminal end and the first lower shielding plate form a rectangular cavity, a head plastic sealing frame is installed in the first shielding member, a head contact member is installed in the head plastic sealing frame, a first grounding elastic contact extending toward the plug-in end is arranged on the first upper shielding plate, a second grounding elastic contact is arranged at the end of the plug-in end of the first shielding member, the contact point of the head contact member is located between the contact point of the first grounding elastic contact and the contact point of the second grounding elastic contact, and outwardly convex bumps are arranged on the two outer side walls of the plug-in end of the first shielding member.
2. The three-layer terraced plug according to claim 1, characterized in that: The head plastic sealing frame includes a connected plastic sealing end and a positioning end, the connecting end of the head contact is plastic sealed in the plastic sealing end, the elastic end of the head contact is located outside the plastic sealing end, and the positioning end is fixedly installed in the U-shaped groove of the first shielding component.
3. The three-layer terraced plug according to claim 2 is characterized in that: The plastic sealing end of the head plastic sealing frame is provided with an escape space corresponding to the first grounding elastic contact, the positioning end of the head plastic sealing frame is provided with an escape space corresponding to the head contact piece, and the positioning end of the head plastic sealing frame is also provided with an escape space corresponding to the second grounding elastic contact.
4. The three-layer terraced plug according to claim 3 is characterized in that: A positioning column is arranged on the positioning end of the head plastic packaging frame, a positioning hole is opened in the U-shaped groove of the first shielding member, and the positioning column is riveted in the positioning hole.
5. The three-layer terraced plug according to any one of claims 1 to 4, characterized in that: The head contact extends out of the first grounding spring contact by at least 1.5 mm.
6. The three-layer terraced plug according to claim 5, characterized in that: The second grounding spring contact protrudes from the head contact piece by at least 1 mm.