Electric connector capable of improving high-frequency performance

Abstract

The utility model discloses an electric connector capable of improving high-frequency performance. The electric connector comprises an insulating body, a plurality of terminals and at least one grounding piece, each terminal comprises a fixing part, an elastic arm and a welding pin, each row of terminals comprises a plurality of signal terminals and a plurality of grounding terminals, and the fixing part of each grounding terminal is provided with a vertical plane; a first contact point, a second contact point and a third contact point are arranged on each vertical plane, a first grounding elastic piece, a second grounding elastic piece and a third grounding elastic piece are arranged on a grounding piece in a matched mode, the first grounding elastic piece inclines downwards to abut against the first contact point, and the second grounding elastic piece inclines upwards to abut against the second contact point. The number of the contact points is large, contact is more stable and reliable, deformation is not prone to occurring, meanwhile, the backflow path is greatly shortened, resonance is effectively improved, and therefore the overall high-frequency performance of the product is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical connectors, and in particular to an electrical connector that can improve high-frequency performance. Background Technology

[0002] Edge-mount connectors, also known as board-to-board connectors or board-edge connectors, are a type of electronic connector primarily used for connections between printed circuit boards (PCBs). These connectors are designed to connect along the edges of the PCB, typically used in scenarios where one board needs to be stacked or inserted onto another. Because edge-mount connectors are designed along the edge of the board, they save space on the board, allowing for a more compact design of electronic devices. Edge-mount connectors usually have a locking or sliding mechanism, allowing the board to be easily inserted and removed, facilitating maintenance and upgrades.

[0003] To achieve better high-frequency characteristics, grounding components are now incorporated into all current edge connectors. These grounding components connect to all grounding terminals, achieving multi-point contact and minimizing electrical length, thereby extending the connector's resonant range to a higher level. In various connector configurations, the different contact points between the grounding spring and the grounding terminal result in varying degrees of resonance improvement.

[0004] However, current edge connectors only have two grounding springs for each grounding terminal, resulting in limited contact points and suboptimal resonance. While some designs feature three grounding springs per grounding terminal, these springs partially contact the inclined surface of the grounding terminal's elastic arm, leading to unstable contact, easy deformation, and a relatively long return path. Therefore, there is significant room for improvement in resonance performance. Consequently, improvements to current edge connectors are necessary. Utility Model Content

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main purpose is to provide an electrical connector that can improve high-frequency performance, which can effectively solve the problem of unsatisfactory resonance effect in existing edge connectors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electrical connector capable of improving high-frequency performance includes an insulating body, multiple terminals, and at least one grounding element. The multiple terminals are arranged in at least one row and are all disposed on the insulating body. Each terminal includes a fixing portion fixed within the insulating body, an elastic arm extending upwardly from the upper end of the fixing portion, and a soldering leg extending from the lower end of the fixing portion. The end of the elastic arm extends into an arc-shaped, protruding contact portion. Each row of terminals includes multiple signal terminals and multiple grounding terminals. Each grounding terminal has a vertical plane on its fixing portion. The grounding element is disposed within the insulating body and located outside the row of terminals. The device has a first contact point, a second contact point, and a third contact point on the vertical plane. The first contact points, the second contact points, and the third contact points located on the same vertical plane are arranged at intervals from top to bottom and form a row. For each grounding terminal, a first grounding spring, a second grounding spring, and a third grounding spring are integrally extended from the grounding member. Multiple first grounding springs are arranged in a row and tilted downwards to abut against the corresponding first contact point. Multiple second grounding springs are arranged in a row and tilted upwards to abut against the corresponding second contact point. Multiple third grounding springs are arranged in a row and tilted upwards to abut against the corresponding third contact point.

[0008] As a preferred embodiment, the first contact point, the second contact point, and the third contact point, which are located on the same vertical plane, are arranged at equal intervals to achieve better high-frequency characteristics.

[0009] As a preferred embodiment, the first grounding spring and the third grounding spring are positioned vertically opposite each other. The first grounding spring and the third grounding spring have the same length and are longer than the second grounding spring. The second grounding spring is located between the first grounding spring and the third grounding spring. This structure is simple and easy to manufacture.

[0010] As a preferred embodiment, the bottom of the insulating body has a downward-facing fixing groove that extends longitudinally. The grounding component is adapted to the fixing groove and is embedded into the fixing groove from bottom to top for fixation. The structure is simple and easy to assemble.

[0011] As a preferred embodiment, the grounding component includes a metal sheet and a plastic plate. The first, second, and third grounding springs are all punched, bent, and extended from the metal sheet. The plastic plate is injection molded and covers the metal sheet. The first, second, and third grounding springs are all exposed on the plastic plate. The plastic plate is tightly fitted and fixed to the fixing groove, effectively preventing the metal sheet from easily deforming. This makes the overall structure of the grounding component stronger and prevents deformation of the grounding component. At the same time, it facilitates the overall installation of the grounding component into the fixing groove.

[0012] As a preferred embodiment, the metal sheet has multiple shielding portions, which cover the outer sides of multiple signal terminals respectively, thereby shielding the signal terminals to prevent interference and improving high-frequency performance.

[0013] As a preferred embodiment, the metal sheet has multiple slots and multiple protrusions, all of which are embedded in the plastic sheet, so that the metal sheet and the plastic sheet are firmly and reliably bonded.

[0014] As a preferred embodiment, the bottom of the insulating body has multiple terminal slots with downward openings. The multiple terminals are respectively inserted into the corresponding terminal slots from bottom to top and fixed. For the terminal slots with grounding terminals inserted, a notch is provided on the inner side wall of the fixing slot. The notch connects the fixing slot and the terminal slot. The first grounding spring, the second grounding spring, and the third grounding spring are located in the notch. Furthermore, the distance from the inner side wall of the fixing slot to the terminal slot is less than the distance from the outer side wall of the fixing slot to the outer side wall of the insulating body.

[0015] As a preferred embodiment, the fixing part has multiple locking points protruding on both sides, which engage and fix with the inner wall of the terminal slot, and the upper end of the fixing part is integrally connected to the elastic arm through a first bridging arc and a second bridging arc.

[0016] As a preferred embodiment, the electrical connector is a snap-on connector. The insulating body includes two opposing sidewalls and a insertion groove located between the sidewalls. The plurality of terminals are arranged in two rows, with the two rows of terminals respectively disposed on the corresponding sidewalls. There are two grounding elements, which are respectively disposed on the outside of the corresponding row of terminals.

[0017] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0018] By setting a first contact point, a second contact point, and a third contact point on each vertical plane, and by setting a first grounding spring, a second grounding spring, and a third grounding spring on the grounding component, with the first grounding spring tilting downwards to abut against the first contact point, the second grounding spring tilting upwards to abut against the second contact point, and the third grounding spring tilting upwards to abut against the third contact point, the number of contact points is large, and the contact is more stable and reliable, less prone to deformation. At the same time, the return path is greatly shortened, and resonance is effectively improved, thereby significantly improving the overall high-frequency performance of the product.

[0019] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1This is a three-dimensional assembly diagram of a preferred embodiment of the present invention;

[0021] Figure 2 This is a three-dimensional assembly schematic diagram of a preferred embodiment of the present invention from another angle;

[0022] Figure 3 This is an exploded view of a preferred embodiment of the present invention;

[0023] Figure 4 This is an exploded view from another angle of a preferred embodiment of the present invention;

[0024] Figure 5 This is a partial assembly cross-sectional view of a preferred embodiment of the present invention;

[0025] Figure 6 This is an enlarged schematic diagram of the terminals in a preferred embodiment of the present invention;

[0026] Figure 7 This is a cross-sectional schematic diagram of a preferred embodiment of the present invention;

[0027] Figure 8 This is a partial side view of the preferred embodiment of the present invention in its usage state;

[0028] Figure 9 This is a comparison diagram of the preferred embodiment of this utility model and the existing structure in terms of usage test.

[0029] Explanation of reference numerals in the attached diagram:

[0030] 10. Insulating body 11. Side wall

[0031] 12. Insertion slot; 13. Fixing slot

[0032] 14. Terminal slot 15. Notch

[0033] 20, Terminal 20S, Signal Terminal

[0034] 20G, grounding terminal 21, fixing part

[0035] 211. Vertical plane 22. Flexible arm

[0036] 23. Welding foot 24. Contact part

[0037] 25. Checkpoint 26. First bridging arc

[0038] 27. Second bridging arc 201, First contact point

[0039] 202, Second contact point; 203, Third contact point

[0040] 30. Grounding component; 31. Metal sheet

[0041] 32. Plastic sheet 301, first grounding spring

[0042] 302, Second grounding spring; 303, Third grounding spring.

[0043] 304, shielding part; 305, slot.

[0044] 306, convex part 40, PCB board

[0045] 50. Additional Card. Detailed Implementation

[0046] Please refer to Figures 1 to 8 As shown, it illustrates the specific structure of an electrical connector that can improve high-frequency performance according to a preferred embodiment of the present invention. The electrical connector is a snap-on connector, which includes an insulating body 10, a plurality of terminals 20 and at least one grounding element 30.

[0047] The insulating body 10 includes two opposing sidewalls 11 and a insertion groove 12 located between the sidewalls 11. The bottom of the insulating body 10 has a downward-facing fixing groove 13, which extends longitudinally. There are two fixing grooves 13, each located within one of the two sidewalls 11. The bottom of the insulating body 10 has a plurality of downward-facing terminal slots 14. The distance from the inner sidewall of the fixing groove 13 to the terminal slot 14 is less than the distance from the outer sidewall of the fixing groove 13 to the outer sidewall of the insulating body 10.

[0048] The multiple terminals 20 are arranged in at least one row and are all disposed on the insulating body 10. Each terminal 20 includes a fixing part 21 fixed in the insulating body 10, an elastic arm 22 extending upward from the upper end of the fixing part 21, and a welding leg 23 extending from the lower end of the fixing part 21. The end of the elastic arm 22 extends into an arc-shaped and protruding contact part 24. Each row of terminals 20 includes multiple signal terminals 20S and multiple ground terminals 20G. Two adjacent signal terminals 20S form a differential terminal pair. Adjacent differential terminal pairs are separated by two ground terminals 20G. In addition, other functional terminals may also be included, such as power terminals, ground terminals, detection terminals, etc. Each grounding terminal 20G has a vertical plane 211 on its fixing part 21. Each vertical plane 211 has a first contact point 201, a second contact point 202, and a third contact point 203. The first contact points 201, the second contact point 202, and the third contact point 203 located on the same vertical plane 211 are arranged at intervals from top to bottom to form a row. In this embodiment, the plurality of terminals 20 are arranged in two rows, and the two rows of terminals 20 are respectively disposed on the corresponding side walls 11. The plurality of terminals 20 are respectively inserted into the corresponding terminal slots 14 from bottom to top for fixing. A notch 15 is provided in the inner side wall of the fixing groove 13 for the terminal slot 14 in which the grounding terminal 20G is inserted. The notch 15 connects the fixing groove 13 and the terminal slot 14. Furthermore, multiple locking points 25 protrude from both sides of the fixing part 21, which engage and fix with the inner wall of the terminal groove 14. The upper end of the fixing part 21 is integrally connected to the elastic arm 22 via a first bridging arc 26 and a second bridging arc 27. In addition, the first contact point 201, the second contact point 202, and the third contact point 203, located on the same vertical plane 211, are evenly spaced.

[0049] The grounding element 30 is disposed within the insulating body 10 and located outside the row of terminals 20. For each grounding terminal 20G, a first grounding spring 301, a second grounding spring 302, and a third grounding spring 303 are integrally extended from the grounding element 30. Multiple first grounding springs 301 are arranged in a row, tilted downwards, and abut against the corresponding first contact point 201. Multiple second grounding springs 302 are arranged in a row, tilted upwards, and abut against the corresponding second contact point 202. Multiple third grounding springs 303 are arranged in a row, tilted upwards, and abut against the corresponding third contact point 203. The contact is stable and reliable, eliminating the risk of deformation. In this embodiment, there are two grounding elements 30, each disposed outside the corresponding row of terminals 20. The grounding element 30 is adapted to the fixing groove 13 and is fixedly embedded in the fixing groove 13 from bottom to top. Specifically, the grounding component 30 includes a metal sheet 31 and a plastic plate 32. The first grounding spring 301, the second grounding spring 302, and the third grounding spring 303 are all punched and bent out of the metal sheet 31. The plastic plate 32 is injection molded and covers the metal sheet 31, with the first grounding spring 301, the second grounding spring 302, and the third grounding spring 303 protruding from the plastic plate 32. The plastic plate 32 is tightly fitted and fixed to the fixing groove 13, effectively preventing the metal sheet 31 from easily deforming, thus strengthening the overall structure of the grounding component 30 and preventing deformation. It also facilitates installation into the fixing groove 13. Furthermore, the metal sheet 31 has multiple shielding portions 304, which respectively cover the outer sides of multiple signal terminals 20S, providing shielding and anti-interference effects for the signal terminals 20S, thereby improving high-frequency performance. Furthermore, the metal sheet 31 has multiple slots 305 and multiple protrusions 306, all of which are embedded in the plastic plate 32, ensuring a firm and reliable bond between the metal sheet 31 and the plastic plate 32. Additionally, the first grounding spring 301, the second grounding spring 302, and the third grounding spring 303 are located in the notch 15. The first grounding spring 301 and the third grounding spring 303 are vertically opposite each other, and their lengths are the same and greater than the length of the second grounding spring 302. The second grounding spring 302 is located between the first grounding spring 301 and the third grounding spring 303.

[0050] The assembly process of this embodiment is described in detail below:

[0051] First, the insulating body 10 is injection molded, and multiple terminals 20 and metal sheets 31 are stamped. Then, the metal sheets 31 are placed in the injection mold to form a plastic plate 32 to create a grounding component 30. Next, the grounding component 30 is inserted into the fixing groove 13 from bottom to top and fixed. Finally, multiple terminals 20 are inserted into the corresponding terminal grooves 14 from bottom to top and fixed. After being inserted into place, the first grounding spring 301, the second grounding spring 302 and the third grounding spring 303 respectively abut against the first contact point 201, the second contact point 202 and the third contact point 203 of the grounding terminal 20G.

[0052] like Figure 9 As shown, this product and the existing structure are soldered onto two PCB boards 40 respectively, and additional cards 50 are inserted into them. After testing, the signal is transmitted from the PCB board 40 to each terminal, and the three grounding springs of the grounding component contact the corresponding grounding terminal 20G. Since the grounding springs of this product have an internal opposing structure, while the grounding springs of the existing structure have an external opposing structure, the return path for the internal opposing structure is L1, while the return path for the external opposing structure is L2. Figure 9 It can be clearly seen that L1 is much smaller than L2. The smaller the L1 value and the smaller the area enclosed by GND, that is, the smaller the return current area, the better the resonance, thereby greatly improving the overall high-frequency performance of the product.

[0053] The key design feature of this invention is that by setting a first contact point, a second contact point, and a third contact point on each vertical plane, and by setting a first grounding spring, a second grounding spring, and a third grounding spring on the grounding component, with the first grounding spring tilting downwards and abutting against the first contact point, the second grounding spring tilting upwards and abutting against the second contact point, and the third grounding spring tilting upwards and abutting against the third contact point, the number of contact points is large, and the contact is more stable and reliable, less prone to deformation. At the same time, the return path is greatly shortened, and resonance is effectively improved, thereby significantly improving the overall high-frequency performance of the product.

[0054] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An electrical connector capable of improving high-frequency performance, comprising an insulating body, a plurality of terminals, and at least one grounding element; the plurality of terminals are arranged in at least one row and are all disposed on the insulating body, each terminal comprising a fixing portion fixed within the insulating body, an elastic arm extending upwardly from the upper end of the fixing portion, and a soldering leg extending bent from the lower end of the fixing portion, the end of the elastic arm extending into an arc-shaped, protruding contact portion, each row of terminals comprising a plurality of signal terminals and a plurality of ground terminals, each ground terminal having a vertical plane on its fixing portion; the grounding element is disposed within the insulating body and located outside the row of terminals; characterized in that: Each vertical plane has a first contact point, a second contact point, and a third contact point. The first contact points, the second contact points, and the third contact points located on the same vertical plane are arranged at intervals from top to bottom and form a row. For each grounding terminal, a first grounding spring, a second grounding spring, and a third grounding spring are integrally extended from the grounding member. Multiple first grounding springs are arranged in a row and tilted downwards to abut against the corresponding first contact point. Multiple second grounding springs are arranged in a row and tilted upwards to abut against the corresponding second contact point. Multiple third grounding springs are arranged in a row and tilted upwards to abut against the corresponding third contact point.

2. The electrical connector with improved high-frequency performance according to claim 1, characterized in that: The first contact point, the second contact point, and the third contact point, which are located on the same vertical plane, are arranged at equal intervals.

3. The electrical connector with improved high-frequency performance according to claim 1, characterized in that: The first grounding spring and the third grounding spring are positioned vertically opposite each other. The first grounding spring and the third grounding spring have the same length and are longer than the second grounding spring. The second grounding spring is located between the first grounding spring and the third grounding spring.

4. The electrical connector with improved high-frequency performance according to claim 1, characterized in that: The bottom of the insulating body has a downward-facing fixing groove that extends longitudinally. The grounding member is adapted to the fixing groove and is fixedly embedded in the fixing groove from bottom to top.

5. The electrical connector with improved high-frequency performance according to claim 4, characterized in that: The grounding component includes a metal sheet and a plastic plate. The first grounding spring, the second grounding spring, and the third grounding spring are all punched, bent, and extended from the metal sheet. The plastic plate is injection molded and covers the metal sheet. The first grounding spring, the second grounding spring, and the third grounding spring are all exposed on the plastic plate. The plastic plate is tightly fitted and fixed with the fixing groove.

6. The electrical connector with improved high-frequency performance according to claim 5, characterized in that: The metal sheet has multiple shielding portions, which respectively cover the outer side of multiple signal terminals.

7. The electrical connector with improved high-frequency performance according to claim 5, characterized in that: The metal sheet has multiple slots and multiple protrusions, all of which are embedded in the plastic sheet.

8. The electrical connector with improved high-frequency performance according to claim 4, characterized in that: The bottom of the insulating body has multiple terminal slots with downward openings. The multiple terminals are inserted into the corresponding terminal slots from bottom to top and fixed. For the terminal slots with grounding terminals inserted, a notch is opened on the inner side wall of the fixing slot. The notch connects the fixing slot and the terminal slot. The first grounding spring, the second grounding spring, and the third grounding spring are located in the notch. The distance from the inner side wall of the fixing slot to the terminal slot is less than the distance from the outer side wall of the fixing slot to the outer side wall of the insulating body.

9. The electrical connector with improved high-frequency performance according to claim 8, characterized in that: Multiple locking points are protruding on both sides of the fixing part. These multiple locking points are engaged and fixed with the inner wall of the terminal slot. The upper end of the fixing part is integrally connected to the elastic arm through the first bridging arc and the second bridging arc.

10. The electrical connector with improved high-frequency performance according to claim 1, characterized in that: The electrical connector is a snap-on connector. The insulating body includes two opposing sidewalls and a insertion slot located between the sidewalls. The multiple terminals are arranged in two rows, with the two rows of terminals respectively disposed on the corresponding sidewalls. There are two grounding components, which are respectively disposed on the outside of the corresponding row of terminals.

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