High-speed connector based on tight coupling structure

Abstract

The utility model provides a high-speed connector based on a tight coupling structure, which comprises an insulating main body and a terminal assembly, and is characterized in that the upper end of the insulating main body is provided with a plugging groove along a first direction and is provided with a plurality of mounting grooves at intervals along the first direction, and the mounting grooves are communicated with the plugging groove; the terminal assembly comprises a plurality of signal terminals and a plurality of ground terminals, the signal terminals are used for transmitting differential signals, the ground terminals are located on the two sides of the signal terminals in the first direction, and one ground terminal is arranged between every two adjacent signal terminals and used for spacing the adjacent signal terminals to reduce interference between the signal terminals. The signal terminal is composed of a first terminal and a second terminal, the upper end of the first terminal and / or the upper end of the second terminal are / is provided with a bending part, the bending part inclines towards the direction far away from the adjacent ground terminal so that the first terminal and the second terminal can be tightly coupled, the terminal characteristic impedance can be reduced, the terminal impedance can be better matched, the high-frequency signal transmission performance can be improved, and the signal transmission efficiency can be improved. And the purpose of improving insertion loss and return loss is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electronic connector technology, and in particular to a high-speed connector based on a tight coupling structure. Background Technology

[0002] High-speed connectors are widely used in electronic products such as computers, storage devices, and wireless network cards, primarily to enable high-speed data transmission. However, with the increasing speed of electronic devices, traditional connectors are prone to signal crosstalk and impedance mismatch in high-frequency operating environments, thus affecting the stability and reliability of data transmission.

[0003] Existing high-speed connectors typically use differential signal pairs for signal transmission and reduce crosstalk by placing ground terminals (GND) between the signal terminals. For example, a common terminal arrangement is "GSSGSSG," where "G" represents the ground terminal and "S" represents the signal terminal. This structure effectively suppresses electromagnetic interference (EMI) and improves signal integrity. However, as connector sizes gradually shrink, signal terminals are often designed to be thinner, resulting in higher characteristic impedances. This not only affects signal transmission quality but also increases the connector's insertion loss / return loss. Utility Model Content

[0004] The purpose of this application is to provide a high-speed connector based on a tightly coupled structure to solve the problem of high characteristic impedance of signal terminals in high-speed connectors.

[0005] To achieve this objective, the following technical solution is adopted in this application:

[0006] This application provides a high-speed connector based on a tightly coupled structure, which includes an insulating body and a terminal assembly, wherein:

[0007] An insulating body is arranged along a first direction, and a plug-in groove is provided at the upper end of the insulating body along the first direction. The plug-in groove is configured to plug in an external expansion device. The plug-in groove extends along the first direction. A number of mounting grooves are provided at intervals at the rear end of the insulating body along the first direction. The mounting grooves are arranged along a second direction and are connected to the plug-in groove.

[0008] The terminal assembly includes several signal terminals and several ground terminals. The signal terminals are configured to transmit differential signals. The ground terminals are located on both sides of the signal terminals along a first direction. A ground terminal is disposed between two adjacent signal terminals. The ground terminals are configured to space adjacent signal terminals to reduce interference between signal terminals. Each signal terminal consists of a first terminal and a second terminal. The first terminal is configured to transmit a positive signal, and the second terminal is configured to transmit a reverse signal. The ground terminals, the first terminal, and the second terminal are spaced apart in the mounting slot along the first direction.

[0009] The upper end of the first terminal and / or the second terminal is provided with a bent portion, which is inclined away from the adjacent ground terminal so as to tightly couple the first terminal and the second terminal, thereby reducing the characteristic impedance of the signal terminal.

[0010] Optionally, the first terminal includes a first lever arm, a second lever arm, and a first bend, wherein a first end of the first bend is connected to a first end of the first lever arm, a second end of the first bend is connected to a first end of the second lever arm, the second lever arm is located above the first lever arm, and the first bend is inclined close to the adjacent second terminal.

[0011] The second terminal includes a third lever arm, a fourth lever arm, and a second bend. The first end of the second bend is connected to the first end of the third lever arm, and the second end of the second bend is connected to the first end of the fourth lever arm. The fourth lever arm is located above the third lever arm. The second bend is inclined close to the adjacent first terminal so that the second lever arm and the fourth lever arm are tightly coupled.

[0012] Optionally, the distance between adjacent second and fourth lever arms along the first direction is 0.15mm to 0.35mm, and the distance between adjacent first and third lever arms along the first direction is 0.25mm to 0.45mm.

[0013] Optionally, the first bend and the second bend are respectively configured as arc-shaped structures on at least one side along the first direction. The arc-shaped structures are configured to enhance the bending strength of the first bend and the second bend. An arc-shaped surface is provided on the outer side of the arc-shaped structure, and the arc-shaped surface connects two adjacent lever arms.

[0014] Optionally, the second end of the second lever arm is provided with a first contact portion, the first contact portion extending into the insertion groove, and the second end of the first lever arm is provided with a first welding foot;

[0015] The second end of the fourth lever arm is provided with a second contact part, which extends into the insertion groove; the second end of the third lever arm is provided with a second welding foot.

[0016] The ground terminal includes a support arm, a third contact portion is provided at the first end of the support arm, the third contact portion extends into the insertion groove, and a third solder foot is provided at the second end of the support arm.

[0017] The first contact portion, the second contact portion, and the third contact portion are respectively connected to the external expansion device. The first contact portion, the second contact portion, and the third contact portion overlap along the first direction. The first solder foot, the second solder foot, and the third solder foot are respectively connected to the circuit board, thereby realizing the electrical connection between the external expansion device and the circuit board. The first solder foot, the second solder foot, and the third solder foot overlap along the first direction.

[0018] Optionally, the ground terminal also includes a first retaining part, which is fixedly connected to the support arm along the second direction. A first limiting groove is provided in the mounting groove corresponding to the ground terminal. The first retaining part is adapted to the first limiting groove, and the first retaining part is inserted into the first limiting groove to drive the support arm to be fixed in the mounting groove.

[0019] The first terminal also includes a second retaining part, which is fixedly installed on the first lever arm along the second direction. A second limiting groove is provided in the mounting groove corresponding to the first terminal and the second terminal. The second limiting groove is adapted to the second retaining part. The second retaining part is inserted into the corresponding second limiting groove to drive the first lever arm and the second lever arm to be fixedly installed in the mounting groove.

[0020] The second terminal also includes a third holding part, which has the same structure as the second holding part. The third holding part is fixedly installed on the third lever arm along the second direction. The third holding part is inserted into the corresponding second limiting groove to drive the third lever arm and the fourth lever arm to be fixedly installed in the mounting groove.

[0021] The first retaining part, the second retaining part, and the third retaining part are arranged at intervals along the first direction.

[0022] Optionally, a groove is provided on the upper end of the support arm near the first holding part, with the opening of the groove facing the mounting groove.

[0023] Optionally, the width of the ground terminal in the second direction is greater than the width of the signal terminal in the second direction, and the middle of the ground terminal covers the middle of the signal terminal in the first direction.

[0024] Compared with existing technologies, the high-speed connector based on a tight coupling structure proposed in this application has the following advantages:

[0025] 1) The inclined design of the bending part makes the signal terminals tightly coupled, thereby reducing the characteristic impedance of the terminals and making the impedance of the terminals more matched. This not only improves the high-frequency signal transmission performance, but also achieves the purpose of improving insertion loss and return loss.

[0026] 2) By limiting the spacing range, it is possible to ensure tight coupling while avoiding manufacturing difficulties or short circuit risks caused by excessively small spacing, as well as the impact of excessively large spacing on tight coupling and signal transmission quality, thus ensuring the reliability and stability of the connector during manufacturing and use.

[0027] 3) By setting arc-shaped structures in the first and second bends, the bending strength of the bends is enhanced, the mechanical stability of the terminals is improved, and the deformation or damage of the terminals caused by insufficient bending strength is reduced, thereby ensuring the long-term reliable use of the connector.

[0028] 4) By opening a groove with an opening facing the mounting slot near the upper end of the support arm near the first holding part, the groove forms an elastic area when the upper end of the ground terminal is subjected to external force, thereby reducing the positive force of the ground terminal, improving the ground terminal drop, and not affecting crosstalk. Attached Figure Description

[0029] To more clearly illustrate and understand the technical solutions in the embodiments of this application, the accompanying drawings used in the background technology and embodiment descriptions of this application will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this application and these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of a high-speed connector based on a tightly coupled structure provided in an embodiment of this application;

[0031] Figure 2 This is a partial front view of the terminal assembly of a high-speed connector based on a tightly coupled structure provided in an embodiment of this application;

[0032] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 This is a three-dimensional structural diagram of the ground terminal of the terminal assembly of a high-speed connector based on a tightly coupled structure provided in an embodiment of this application;

[0034] Figure 5 This is a three-dimensional structural schematic diagram of the first terminal of the terminal assembly of the high-speed connector based on a tight coupling structure provided in the embodiments of this application;

[0035] Figure 6 This is a three-dimensional structural schematic diagram of the second terminal of the terminal assembly of the high-speed connector based on a tight coupling structure provided in the embodiments of this application;

[0036] Figure 7 This is a side view of a ground terminal and a signal terminal of a terminal assembly of a high-speed connector based on a tightly coupled structure provided in an embodiment of this application. Detailed Implementation

[0037] To facilitate understanding of this application, a more complete description of the application will be provided below with reference to the accompanying drawings. Preferred embodiments of the application are shown in the drawings. However, the application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there may be an intermediate component. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Please see Figures 1 to 7 As shown, this application provides a high-speed connector based on a tightly coupled structure, which includes an insulating body 10 and a terminal assembly 20, wherein: the insulating body 10 is along a first direction ( Figure 1 The insulating body 10 is configured with a plug-in groove 11 at its upper end along the first direction (in the direction of X). The plug-in groove 11 is configured to plug in an external expansion device. The plug-in groove 11 extends along the first direction. The rear end of the insulating body 10 is provided with a plurality of mounting grooves 12 at intervals along the first direction. The mounting grooves 12 extend along the second direction (in the direction of X). Figure 1 The mounting slot 12 is connected to the insertion slot 11 in the Y direction. The terminal assembly 20 includes a plurality of signal terminals 21 and a plurality of ground terminals 22. The signal terminals 21 are configured to transmit differential signals. The ground terminals 22 are located on both sides of the signal terminals 21 along the first direction. A ground terminal 22 is provided between two adjacent signal terminals 21. The ground terminals 22 are configured to space adjacent signal terminals 21 to reduce interference between signal terminals 21. The signal terminals 21 are composed of a first terminal 210 and a second terminal 211. The first terminal 210 is configured to transmit a positive signal, and the second terminal 211 is configured to transmit a reverse signal. The ground terminals 22, the first terminal 210 and the second terminal 211 are installed in the mounting slot 12 at intervals along the first direction. The upper end of the first terminal 210 and / or the second terminal 211 is provided with a bent portion. The bent portion is inclined away from the adjacent ground terminal 22 so that the first terminal 210 and the second terminal 211 are tightly coupled, thereby reducing the characteristic impedance of the signal terminals 21.

[0039] The inclined design of the bend makes the signal terminal 21 tightly coupled, thereby reducing the characteristic impedance of the terminal and making the impedance of the terminal more matched. This not only improves the high-frequency signal transmission performance, but also achieves the purpose of improving insertion loss and return loss.

[0040] In one embodiment, the first terminal 210 includes a first lever arm 2100, a second lever arm 2101, and a first bent portion 2102. The first end of the first bent portion 2102 is connected to the first end of the first lever arm 2100, and the second end of the first bent portion 2102 is connected to the first end of the second lever arm 2101. The second lever arm 2101 is located above the first lever arm 2100, and the first bent portion 2102 is inclined close to the adjacent second terminal 211. The second terminal 211 includes a third lever arm 2110, a fourth lever arm 2111, and a second bent portion 2112. The first end of the second bent portion 2112 is connected to the first end of the third lever arm 2110, and the second end of the second bent portion 2112 is connected to the first end of the fourth lever arm 2111. The fourth lever arm 2111 is located above the third lever arm 2110, and the second bent portion 2112 is inclined close to the adjacent first terminal 210 so that the second lever arm 2101 and the fourth lever arm 2111 are tightly coupled.

[0041] By tilting the first bending portion 2102 toward the second terminal 211 and the second bending portion 2112 toward the first terminal 210, the distance between the second lever arm 2101 and the fourth lever arm 2111 becomes closer, forming a symmetrical tight coupling structure and improving the consistency of the differential signal.

[0042] In one embodiment, the distance between adjacent second lever arm 2101 and fourth lever arm 2111 along the first direction is 0.15mm to 0.35mm, and the distance between adjacent first lever arm 2100 and third lever arm 2110 along the first direction is 0.25mm to 0.45mm.

[0043] Specifically, the distance between adjacent second lever arm 2101 and fourth lever arm 2111 along the first direction is 0.25mm, and the distance between adjacent first lever arm 2100 and third lever arm 2110 along the first direction is 0.35mm.

[0044] By limiting the spacing range, it is possible to ensure tight coupling while avoiding manufacturing difficulties or short-circuit risks caused by excessively small spacing, as well as the impact of excessively large spacing on tight coupling and signal transmission quality, thus ensuring the reliability and stability of the connector during manufacturing and use.

[0045] In one embodiment, the first bending portion 2102 and the second bending portion 2112 are respectively configured as arc-shaped structures on at least one side along a first direction. The arc-shaped structures are configured to enhance the bending strength of the first bending portion 2102 and the second bending portion 2112. An arc-shaped surface 2103 is provided on the outer side of the arc-shaped structure, and the arc-shaped surface 2103 connects two adjacent lever arms.

[0046] Specifically, the first bending portion 2102 and the second bending portion 2112 are respectively provided with arc-shaped surfaces 2103 on both sides along the first direction.

[0047] By providing an arc-shaped structure in the first bending portion 2102 and the second bending portion 2112, the bending strength of the bending portion is enhanced, the mechanical stability of the terminal is improved, and the deformation or damage of the terminal due to insufficient bending strength is reduced, thereby ensuring the long-term reliable use of the connector.

[0048] In one embodiment, the second arm 2101 has a first contact portion 2104 at its second end, which extends into the insertion groove 11; the second arm 2100 also has a first solder foot 2105 at its second end; the fourth arm 2111 has a second contact portion 2113 at its second end, which extends into the insertion groove 11; the third arm 2110 has a second solder foot 2114 at its second end; and the ground terminal 22 includes a support arm 220, the first end of which has a third contact portion 2201 extending into the insertion groove 11. The second end of the support arm 220 is provided with a third solder foot 2202; the first contact part 2104, the second contact part 2113 and the third contact part 2201 are respectively connected to the external expansion device, the first contact part 2104, the second contact part 2113 and the third contact part 2201 overlap along the first direction, and the first solder foot 2105, the second solder foot 2114 and the third solder foot 2202 are respectively connected to the circuit board, thereby realizing the electrical connection between the external expansion device and the circuit board, the first solder foot 2105, the second solder foot 2114 and the third solder foot 2202 overlap along the first direction.

[0049] By aligning the first contact 2104, the second contact 2113, and the third contact 2201 along the first direction, and by aligning the first solder pad 2105, the second solder pad 2114, and the third solder pad 2202 along the first direction, the transmission path length of the signal and ground loop is made consistent, reducing the differential pair delay difference and ensuring the synchronization of high-speed signal transmission. At the same time, it can also maintain the continuity of characteristic impedance between adjacent terminals, reduce impedance fluctuations, and enhance the high-frequency performance of the connector.

[0050] In one embodiment, the ground terminal 22 further includes a first retaining portion 221, which is fixedly connected to the support arm 220 along a second direction. A first limiting groove is formed in the mounting groove 12 corresponding to the ground terminal 22, and the first retaining portion 221 is adapted to the first limiting groove. The first retaining portion 221 is inserted into the first limiting groove to drive the support arm 220 to be fixed in the mounting groove 12. The first terminal 210 further includes a second retaining portion 2106, which is fixedly installed on the first lever arm 2100 along a second direction. A second limiting groove is formed in the mounting groove 12 corresponding to the first terminal 210 and the second terminal 211. The second limiting groove and the second retaining portion 221 are connected to the first lever arm 220. The second holding part 2106 is inserted into the corresponding second limiting groove to drive the first lever arm 2100 and the second lever arm 2101 to be fixedly installed in the mounting groove 12; the second terminal 211 also includes a third holding part 2115, which has the same structure as the second holding part 2106. The third holding part 2115 is fixedly installed on the third lever arm 2110 along the second direction. The third holding part 2115 is inserted into the corresponding second limiting groove to drive the third lever arm 2110 and the fourth lever arm 2111 to be fixedly installed in the mounting groove 12; the first holding part 221, the second holding part 2106 and the third holding part 2115 are spaced apart along the first direction.

[0051] By engaging the retaining portion on the terminal with the limiting groove in the mounting groove 12, the terminal can be easily fixed in the corresponding mounting groove 12, preventing the terminal from shifting and improving the stability and safety of the connector operation.

[0052] In one embodiment, the support arm 220 has a groove 222 near the upper end of the first holding part 221, and the opening of the groove 222 faces the mounting groove 12.

[0053] Specifically, the groove 222 is formed by stamping and piercing.

[0054] By opening a groove 222 with an opening facing the mounting groove 12 at the upper end of the support arm 220 near the first holding part 221, the groove 222 forms an elastic area when the upper end of the ground terminal 22 is subjected to external force, thereby reducing the positive force of the ground terminal 22, improving the ground terminal 22 descent, and not affecting crosstalk.

[0055] In one embodiment, the width of the middle portion of the ground terminal 22 along the second direction is greater than the width of the signal terminal 21 along the second direction, and the middle portion of the ground terminal 22 covers the middle portion of the signal terminal 21 along the first direction.

[0056] By widening the middle of the ground terminal 22 along the second direction and covering the adjacent signal terminal 21, the effective cross-sectional area of ​​the ground terminal 22 is expanded, which effectively enhances the shielding effect, suppresses interference between signals, and thus improves the crosstalk problem between signal terminals 21.

[0057] The above embodiments merely illustrate the basic principles and characteristics of this application. This application is not limited to the above examples. Various changes and modifications can be made to this application without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this application as claimed. The scope of protection of this application is defined by the appended claims and their equivalents.

Claims

1. A high speed connector based on a tight coupling structure, characterized in that, The high-speed connector based on the close-coupled structure comprises an insulating body and a terminal assembly, wherein: The insulating body is arranged along a first direction, an upper end of the insulating body is provided with a plug-in slot along the first direction, the plug-in slot is configured to plug in an external expansion device, the plug-in slot extends along the first direction, and a rear end of the insulating body is provided with a plurality of mounting slots along the first direction, the mounting slots are arranged along a second direction, and the mounting slots are communicated with the plug-in slot; The terminal assembly comprises a plurality of signal terminals and a plurality of ground terminals, the signal terminals are configured to transmit differential signals, the ground terminals are located on both sides of the signal terminals along the first direction, one ground terminal is arranged between adjacent two signal terminals, the ground terminals are configured to separate the adjacent signal terminals to reduce interference between the signal terminals, the signal terminals are composed of first terminals and second terminals, the first terminals are configured to transmit forward signals, the second terminals are configured to transmit reverse signals, and the ground terminals, the first terminals and the second terminals are mounted in the mounting slots along the first direction; A bending part is arranged at an upper end of the first terminal and / or the second terminal, the bending part is inclined away from the adjacent ground terminal, so that the first terminal and the second terminal are close-coupled, thereby reducing the characteristic impedance of the signal terminal.

2. The high speed connector based on tight coupling structure of claim 1, wherein, The first terminal comprises a first force arm, a second force arm and a first bending part, a first end of the first bending part is connected to a first end of the first force arm, a second end of the first bending part is connected to a first end of the second force arm, the second force arm is located above the first force arm, and the first bending part is inclined close to the adjacent second terminal; The second terminal comprises a third force arm, a fourth force arm and a second bending part, a first end of the second bending part is connected to a first end of the third force arm, a second end of the second bending part is connected to a first end of the fourth force arm, the fourth force arm is located above the third force arm, and the second bending part is inclined close to the adjacent first terminal, so that the second force arm and the fourth force arm are close-coupled.

3. The high speed connector based on tight coupling structure of claim 2, wherein, The distance between the adjacent second force arm and the fourth force arm along the first direction is 0.15mm-0.35mm, and the distance between the adjacent first force arm and the third force arm along the first direction is 0.25mm-0.45mm.

4. The high speed connector based on tight coupling structure of claim 2, wherein, The first bending part and the second bending part are respectively arranged as arc structures at least on one side along the first direction, the arc structures are configured to enhance the bending strength of the first bending part and the second bending part, and arc surfaces are arranged outside the arc structures, and the arc surfaces are connected to two force arms above and below.

5. The high speed connector based on tight coupling structure of claim 2, wherein, A first contact part is arranged at a second end of the second force arm, the first contact part extends into the plug-in slot, and a first soldering leg is arranged at a second end of the first force arm; A second contact part is arranged at a second end of the fourth force arm, the second contact part extends into the plug-in slot, and a second soldering leg is arranged at a second end of the third force arm; The ground terminal comprises a support arm, a third contact part is arranged at a first end of the support arm, the third contact part extends into the plug-in slot, a third soldering leg is arranged at a second end of the support arm; The first contact part, the second contact part and the third contact part are respectively connected with an external expansion device, the first contact part, the second contact part and the third contact part coincide along the first direction, the first soldering leg, the second soldering leg and the third soldering leg are respectively connected with a circuit board, so as to realize the electrical connection between the external expansion device and the circuit board, and the first soldering leg, the second soldering leg and the third soldering leg coincide along the first direction.

6. The high speed connector based on tight coupling structure according to claim 5, characterized in that, The ground terminal further comprises a first holding part, the first holding part is fixedly connected with the support arm along the second direction, a first limiting slot is arranged in the mounting slot corresponding to the ground terminal, the first holding part is matched with the first limiting slot, and the first holding part is inserted into the first limiting slot to fix the support arm in the mounting slot; The first terminal further comprises a second holding part, the second holding part is fixedly arranged on the first force arm along the second direction, a second limiting slot is arranged in the mounting slot corresponding to the first terminal and the second terminal, the second limiting slot is matched with the second holding part, and the second holding part is inserted into the corresponding second limiting slot to fix the first force arm and the second force arm in the mounting slot; The second terminal further comprises a third holding part, the third holding part is the same in structure as the second holding part, the third holding part is fixedly arranged on the third force arm along the second direction, and the third holding part is inserted into the corresponding second limiting slot to fix the third force arm and the fourth force arm in the mounting slot; The first holding part, the second holding part and the third holding part are arranged at intervals along the first direction.

7. The high speed connector based on tight coupling structure according to claim 6, characterized in that, A groove is arranged at an upper end of the first holding part close to the support arm, and an opening of the groove faces the mounting slot.

8. The high speed connector based on tight coupling structure of claim 1, wherein, The width of the middle part of the ground terminal along the second direction is greater than the width of the middle part of the signal terminal along the second direction, and the middle part of the ground terminal covers the middle part of the signal terminal along the first direction.

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