Electric connector capable of improving high-frequency performance

Abstract

The invention 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] The present invention relates to the field of electric connectors, and in particular to an electric connector capable of improving high frequency performance. Background Art

[0002] Card edge connectors, also known as board-to-board connectors or board edge connectors, are a type of electronic connector that is primarily used for connections between printed circuit boards (PCBs). This type of connector is designed to connect along the edge of a printed circuit board and is typically used in scenarios where one circuit board needs to be stacked or inserted into another circuit board. Because card edge connectors are designed along the edge of the circuit board, they can save space on the circuit board and make the design of electronic devices more compact. Card edge connectors typically have a locking or sliding mechanism that allows circuit boards to be easily inserted and removed, making maintenance and upgrades easier.

[0003] In order to achieve better high-frequency characteristics, grounding pieces are currently provided in card edge connectors. The grounding pieces overlap all grounding terminals and achieve multi-point contact to minimize the electrical length and push the resonance range of the electrical connector to a higher range. In various forms of electrical connectors, the different contact points between the grounding spring of the grounding piece and the grounding terminal result in different effects of improving resonance.

[0004] However, the grounding parts on the current card edge connector are only provided with two grounding springs for each grounding terminal, with few contact points and unsatisfactory resonance effect. Although there are also structures with three grounding springs for each grounding terminal, these grounding springs partially contact the inclined surface of the elastic arm of the grounding terminal, which is unstable and easy to deform, and the return path is also relatively long, so there is still a lot of room for improvement in the resonance effect. Therefore, it is necessary to improve the current card edge connector. Summary of the invention

[0005] In view of this, the present invention aims at the deficiencies in the prior art, 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 of the existing card edge connector.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An electrical connector capable of improving high-frequency performance, comprising an insulating body, a plurality of terminals and at least one grounding member; the plurality of terminals are arranged in at least one row and are all arranged on the insulating body, each terminal comprises a fixing portion fixed in the insulating body, an elastic arm extending upwardly obliquely from the upper end of the fixing portion, and a welding foot extending from the lower end of the fixing portion by bending, and a contact portion extending with an arc-shaped bend and protruding from the end of the elastic arm, each row of terminals comprises a plurality of signal terminals and a plurality of grounding terminals, and each grounding terminal has a vertical plane on its fixing portion; the grounding member is arranged in the insulating body and is located outside the row of terminals; each straight A first contact point, a second contact point and a third contact point are provided on the vertical plane, and the first contact point, the second contact point and the third contact point located on the same vertical plane are arranged in a row from top to bottom; for each grounding terminal, a first grounding spring sheet, a second grounding spring sheet and a third grounding spring sheet are integrally extended from the grounding member, a plurality of first grounding spring sheets are arranged in a row and tilted downward and abut against the corresponding first contact point, a plurality of second grounding spring sheets are arranged in a row and tilted upward and abut against the corresponding second contact point, and a plurality of third grounding spring sheets are arranged in a row and tilted upward and abut against the corresponding third contact point.

[0008] As a preferred solution, the first contact point, the second contact point and the third contact point located on the same vertical plane are evenly spaced to achieve better high-frequency characteristics.

[0009] As a preferred solution, the first grounding spring clip and the third grounding spring clip are opposite to each other up and down, the lengths of the first grounding spring clip and the third grounding spring clip are the same and greater than the length of the second grounding spring clip, and the second grounding spring clip is located between the first grounding spring clip and the third grounding spring clip. The structure is simple and easy to manufacture.

[0010] As a preferred solution, the bottom of the insulating body has a fixing groove with an opening facing downward, the fixing groove extends longitudinally, the grounding piece is adapted to the fixing groove and is embedded in the fixing groove from bottom to top for fixation, the structure is simple, and the assembly is convenient.

[0011] As a preferred solution, the grounding member includes a metal sheet and a plastic plate. The first grounding spring sheet, the second grounding spring sheet and the third grounding spring sheet are all punched, bent and extended from the metal sheet. The plastic plate is injection molded and covered on the outside of the metal sheet. The first grounding spring sheet, the second grounding spring sheet and the third grounding spring sheet are all exposed from the plastic plate. The plastic plate is tightly fitted and fixed to the fixing groove, which effectively prevents the metal sheet from being easily deformed, making the overall structural strength of the grounding member stronger, preventing the grounding member from being deformed, and facilitating the overall installation of the grounding member into the fixing groove.

[0012] As a preferred solution, the metal sheet has a plurality of shielding parts, which respectively cover the outer sides of a plurality of signal terminals, thereby shielding the signal terminals from interference and improving high-frequency performance.

[0013] As a preferred solution, the metal sheet is provided with a plurality of slots and a plurality of protrusions, and the plurality of slots and the plurality of protrusions are buried in the plastic plate, so that the metal sheet and the plastic plate are firmly and reliably combined.

[0014] As a preferred embodiment, the bottom of the insulating body has a plurality of terminal grooves with openings facing downward, and the plurality of terminals are respectively inserted into the corresponding terminal grooves from bottom to top and fixed, and a notch is opened on the inner side wall of the fixing groove for the terminal groove in which the grounding terminal is inserted, and the notch connects the fixing groove and the terminal groove, and the first grounding spring sheet, the second grounding spring sheet and the third grounding spring sheet are located in the notch, and the distance from the inner side wall of the fixing groove to the terminal groove is smaller than the distance from the outer side wall of the fixing groove to the outer side wall of the insulating body.

[0015] As a preferred solution, multiple clamping points are protruding on both sides of the fixing part, and the multiple clamping points are clamped and fixed with the inner wall of the terminal groove, and the upper end of the fixing part is integrally connected with the elastic arm through the first bridging arc and the second bridging arc in sequence.

[0016] As a preferred embodiment, the electrical connector is a card edge connector, the insulating body includes two opposite side walls and a plug-in slot located between the side walls, the multiple terminals are arranged in two rows, the two rows of terminals are respectively arranged on the corresponding side walls, and the number of grounding members is two, and the two grounding members are respectively arranged on the outside of the corresponding rows of terminals.

[0017] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0018] By setting a first contact point, a second contact point and a third contact point on each vertical plane, and setting a first grounding spring clip, a second grounding spring clip and a third grounding spring clip on the grounding piece, and the first grounding spring clip is tilted downward to abut the first contact point, the second grounding spring clip is tilted upward to abut the second contact point, and the third grounding spring clip is tilted upward to abut the third contact point. There are many contact points, and the contact is more stable and reliable, and not easy to deform. At the same time, the return path is greatly shortened, and the resonance is effectively improved, thereby greatly improving the overall high-frequency performance of the product.

[0019] In order to more clearly illustrate the structural features and effects of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of an assembly perspective view of a preferred embodiment of the present invention;

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

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

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

[0024] Figure 5 It is a partial assembly cross-sectional schematic diagram of a preferred embodiment of the present invention;

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

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

[0027] Figure 8 It is a partial side view of the preferred embodiment of the present invention in use;

[0028] Fig. 9 It is a comparison chart of the use test of the preferred embodiment of the present invention and the existing structure.

[0029] Description of the accompanying drawings:

[0030] 10. Insulation body 11. Side wall

[0031] 12. Plug slot 13. Fixed slot

[0032] 14. Terminal slot 15. Notch

[0033] 20. Terminal 20S, signal terminal

[0034] 20G, ground terminal 21, fixed part

[0035] 211, vertical plane 22, elastic arm

[0036] 23. Welding foot 24. Contact part

[0037] 25. Card point 26. First bridge arc

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

[0039] 202, second contact point 203, third contact point

[0040] 30. Grounding piece 31. Metal sheet

[0041] 32. Plastic plate 301. First grounding spring

[0042] 302, second grounding spring piece 303, third grounding spring piece

[0043] 304, shielding part 305, slot

[0044] 306, convex part 40, PCB board

[0045] 50. Additional card. DETAILED DESCRIPTION

[0046] Please refer to Figures 1 to 8 As shown, it shows the specific structure of an electrical connector that can improve high-frequency performance in a preferred embodiment of the present invention. The electrical connector is a card edge connector, including an insulating body 10, a plurality of terminals 20 and at least one grounding member 30.

[0047] The insulating body 10 includes two opposite side walls 11 and a plug-in slot 12 between the side walls 11. The bottom of the insulating body 10 has a fixing slot 13 with an opening facing downward. The fixing slot 13 extends longitudinally. There are two fixing slots 13, which are respectively located in the two side walls 11. The bottom of the insulating body 10 has a plurality of terminal slots 14 with openings facing downward, and the distance from the inner side wall of the fixing slot 13 to the terminal slot 14 is smaller than the distance from the outer side wall of the fixing slot 13 to the outer side wall 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 portion 21 fixed in the insulating body 10, an elastic arm 22 extending obliquely upward from the upper end of the fixing portion 21, and a welding foot 23 extending from the lower end of the fixing portion 21. An arc-shaped and protruding contact portion 24 extends from the end of the elastic arm 22. Each row of terminals 20 includes a plurality of signal terminals 20S and a plurality of ground terminals 20G. Two adjacent signal terminals 20S constitute a differential terminal pair. Adjacent differential terminal pairs are separated by two ground terminals 20G. At the same time, other functional terminals may also be included, such as power terminals, ground terminals, detection terminals, etc. Each of the fixing portions 21 of the grounding terminal 20G has a vertical plane 211, and each of the vertical planes 211 has a first contact point 201, a second contact point 202, and a third contact point 203. The first contact point 201, the second contact point 202, and the third contact point 203 located on the same vertical plane 211 are arranged from top to bottom and 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 arranged on the corresponding side walls 11. The plurality of terminals 20 are respectively inserted into the corresponding terminal slots 14 from bottom to top and fixed, and a notch 15 is opened on the inner side wall of the fixing slot 13 for the terminal slot 14 in which the grounding terminal 20G is inserted, and the notch 15 communicates between the fixing slot 13 and the terminal slot 14. Furthermore, multiple clamping points 25 are protruded on both sides of the fixing portion 21, and the multiple clamping points 25 are clamped and fixed with the inner wall of the terminal slot 14, and the upper end of the fixing portion 21 is integrally connected with the elastic arm 22 through the first bridge arc 26 and the second bridge 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 member 30 is arranged in the insulating body 10 and is 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 member 30, a plurality of first grounding springs 301 are arranged in a row and tilted downward and abutted against the corresponding first contact point 201, a plurality of second grounding springs 302 are arranged in a row and tilted upward and abutted against the corresponding second contact point 202, and a plurality of third grounding springs 303 are arranged in a row and tilted upward and abutted against the corresponding third contact point 203, and the contact is stable and reliable, and there is no risk of poor deformation. In this embodiment, there are two grounding members 30, and the two grounding members 30 are respectively arranged outside the corresponding row of terminals 20. The grounding member 30 is adapted to the fixing groove 13 and is embedded in the fixing groove 13 from bottom to top for fixing. Specifically, the grounding member 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, bent and extended from the metal sheet 31. The plastic plate 32 is injection molded and covered on the outside of the metal sheet 31. The first grounding spring 301, the second grounding spring 302 and the third grounding spring 303 are all exposed from the plastic plate 32. The plastic plate 32 is tightly matched and fixed with the fixing groove 13, which effectively prevents the metal sheet 31 from being easily deformed, making the overall structural strength of the grounding member 30 stronger, preventing the grounding member 30 from being deformed, and also facilitating installation into the fixing groove 13. In addition, the metal sheet 31 has a plurality of shielding parts 304, which respectively cover the outer sides of a plurality of signal terminals 20S, and play a role in shielding and preventing interference with the signal terminals 20S, thereby improving high-frequency performance. Furthermore, the metal sheet 31 is provided with a plurality of slots 305, and the metal sheet 31 is provided with a plurality of protrusions 306, and the plurality of slots 305 and the plurality of protrusions 306 are all buried in the plastic plate 32, so that the metal sheet 31 and the plastic plate 32 are firmly and reliably combined. In addition, 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 opposite to each other in the vertical direction, the lengths of the first grounding spring 301 and the third grounding spring 303 are the same and greater than the length of the second grounding spring 302, and 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 as follows:

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

[0052] like Fig. 9 As shown, the present product and the prior art structure are respectively welded on two PCB boards 40, and the additional cards 50 are respectively inserted. After use and testing, the signal is transmitted from the PCB board 40 to each terminal, and the three grounding springs of the grounding member are in contact with the corresponding grounding terminal 20G. Since each grounding spring of the present product is an inner opposing structure, and each grounding spring of the prior art structure is an outer opposing structure, the return path of the inner opposing structure is L1, and the return path of the outer opposing structure is L2. Fig. 9 It can be clearly seen from the figure that L1 is much smaller than L2. The smaller the L1 value is, the smaller the area enclosed by GND is, that is, the smaller the return area is, which can effectively improve the resonance and thus greatly improve the overall high-frequency performance of the product.

[0053] The design focus of the present invention is: by setting the first contact point, the second contact point and the third contact point on each vertical plane, and setting the first grounding spring piece, the second grounding spring piece and the third grounding spring piece on the grounding piece, and the first grounding spring piece is tilted downward to abut on the first contact point, the second grounding spring piece is tilted upward to abut on the second contact point, and the third grounding spring piece is tilted upward to abut on the third contact point. The number of contact points is large, and the contact is more stable and reliable, and not easy to deform. At the same time, the return path is greatly shortened, and the resonance is effectively improved, thereby greatly improving the overall high-frequency performance of the product.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An electrical connector capable of improving high-frequency performance, comprising an insulating body, a plurality of terminals and at least one grounding member; the plurality of terminals are arranged in at least one row and are all disposed on the insulating body, each terminal comprises a fixing portion fixed in the insulating body, an elastic arm extending upwardly obliquely from the upper end of the fixing portion, and a welding foot extending from the lower end of the fixing portion by bending, and a contact portion extending with an arc-shaped bend and protruding from the end of the elastic arm, each row of terminals comprises a plurality of signal terminals and a plurality of grounding terminals, and each grounding terminal has a vertical plane on its fixing portion; the grounding member is disposed in the insulating body and is located outside the row of terminals; and it is characterized in that: Each vertical plane has a first contact point, a second contact point and a third contact point, and the first contact point, the second contact point and the third contact point located on the same vertical plane are arranged in a row from top to bottom; for each grounding terminal, a first grounding spring clip, a second grounding spring clip and a third grounding spring clip are integrally extended from the grounding member, a plurality of first grounding spring clips are arranged in a row and tilted downward and abut against the corresponding first contact point, a plurality of second grounding spring clips are arranged in a row and tilted upward and abut against the corresponding second contact point, and a plurality of third grounding spring clips are arranged in a row and tilted upward and abut against the corresponding third contact point.

2. The electrical connector capable of improving high frequency performance according to claim 1, characterized in that: The first contact point, the second contact point and the third contact point located on the same vertical plane are evenly spaced and arranged.

3. The electrical connector capable of improving high frequency performance according to claim 1, characterized in that: The first grounding spring sheet and the third grounding spring sheet are opposite to each other in vertical direction. The first grounding spring sheet and the third grounding spring sheet have the same length and are longer than the second grounding spring sheet. The second grounding spring sheet is located between the first grounding spring sheet and the third grounding spring sheet.

4. The electrical connector capable of improving high frequency performance according to claim 1, characterized in that: The bottom of the insulating body is provided with a fixing groove with an opening facing downwards, the fixing groove extends longitudinally, and the grounding piece is adapted to the fixing groove and embedded in the fixing groove from bottom to top for fixing.

5. The electrical connector capable of improving 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 plate, the second grounding spring plate and the third grounding spring plate are all punched, bent and extended from the metal sheet. The plastic plate is injection molded and covered on the outside of the metal sheet. The first grounding spring plate, the second grounding spring plate and the third grounding spring plate are all exposed from the plastic plate, and the plastic plate is tightly fixed in the fixing groove.

6. The electrical connector capable of improving high frequency performance according to claim 5, characterized in that: The metal sheet is provided with a plurality of shielding parts, and the plurality of shielding parts respectively cover the outer sides of a plurality of signal terminals.

7. The electrical connector capable of improving high frequency performance according to claim 5, characterized in that: The metal sheet is provided with a plurality of slots and a plurality of convex parts, and the plurality of slots and the plurality of convex parts are buried in the plastic plate.

8. The electrical connector capable of improving high frequency performance according to claim 4, characterized in that: The bottom of the insulating body has a plurality of terminal slots with openings facing downwards, and the plurality of terminals are respectively inserted into the corresponding terminal slots from bottom to top and fixed, and a notch is opened on the inner side wall of the fixing slot for the terminal slot in which the grounding terminal is inserted, and the notch connects the fixing slot and the terminal slot, and the first grounding spring sheet, the second grounding spring sheet and the third grounding spring sheet are located in the notch, and the distance from the inner side wall of the fixing slot to the terminal slot is smaller 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 capable of improving high frequency performance according to claim 8, characterized in that: Both sides of the fixing portion are convexly provided with a plurality of clamping points, which are clamped and fixed with the inner wall of the terminal slot, and the upper end of the fixing portion is integrally connected with the elastic arm through the first bridge arc and the second bridge arc in sequence.

10. The electrical connector capable of improving high frequency performance according to claim 1, characterized in that: The electrical connector is a card edge connector, the insulating body includes two opposite side walls and a plug-in slot between the side walls, the multiple terminals are arranged in two rows, the two rows of terminals are respectively arranged on the corresponding side walls, and the number of grounding members is two, the two grounding members are respectively arranged on the outside of the corresponding rows of terminals.

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