Electrical connector

Abstract

The application discloses an electric connector, which comprises an insulating body, a terminal and an absorbing material, at least part of the terminal is arranged in a row and comprises a signal terminal and a ground terminal, the terminal comprises a contact part, a pin and a connecting part connecting the contact part and the pin; the connecting part of the ground terminal is pasted with or surrounded by the absorbing material, and the signal terminal is not provided with the absorbing material. Compared with the prior art, the application only adds the absorbing material at the ground terminal, thereby reducing the resonance of the ground terminal, improving the high-frequency performance and reducing the cost as much as possible.

Description

[Technical Field]

[0001] This invention relates to an electrical connector that incorporates a microwave absorbing material. [Background Technology]

[0002] Chinese Invention Patent Publication No. CN109830820A discloses an electrical connector assembly, comprising: a body made of a microwave absorbing material, mounted on a circuit board, with at least one mounting groove penetrating the upper and lower surfaces of the body; at least one differential signal terminal pair fixed to the circuit board and correspondingly housed in the at least one mounting groove, each mounting groove housing one differential signal terminal pair, the differential signal terminal pair not in contact with the body. Because the body is made of a microwave absorbing material, the material can absorb the energy radiated outward by the differential signal terminal pair, thereby reducing insertion loss and return loss. Furthermore, the microwave absorbing material alters the resonant frequency of the body, reducing unnecessary resonance generated by the differential signal terminal pair, thus ensuring the high-frequency characteristics of the electrical connector assembly.

[0003] However, the entire body of this patent application is made of absorbing material, which not only increases the cost, but also requires a high level of design for the mounting slot and signal terminals because it is necessary to ensure that the differential pair signal terminals do not contact the body.

[0004] Therefore, it is desirable to design an improved electrical connector to overcome the above-mentioned defects. [Summary of the Invention]

[0005] The technical problem to be solved by the present invention is to provide an electrical connector having a microwave absorbing material.

[0006] To solve the above problems, the present invention can adopt the following technical solution: an electrical connector, which includes an insulating body, terminals located on the insulating body, and a microwave absorbing material, at least some of the terminals are arranged in a row and include signal terminals and ground terminals, each terminal including a contact portion, a pin, and a connecting portion connecting the contact portion and the pin; the connecting portion of the ground terminal is covered or surrounded by the microwave absorbing material, while the signal terminals are not provided with the microwave absorbing material.

[0007] Compared with the prior art, the present invention only adds absorbing material at the grounding terminal, which not only reduces the resonance of the grounding terminal and improves high-frequency performance, but also minimizes the cost. [Attached Image Description]

[0008] Figure 1 This is a perspective view of the electrical connector according to the first embodiment of the present invention.

[0009] Figure 2 yes Figure 1 An exploded perspective view of the electrical connector from another angle.

[0010] Figure 3 yes Figure 1 A 3D view of the two terminal modules, with one of the adsorption materials disassembled.

[0011] Figure 4 yes Figure 3 A more detailed 3D disassembly.

[0012] Figure 5 yes Figure 3 A 3D view of the upper and middle row of terminals.

[0013] Figure 6 yes Figure 3 A 3D view of the lower middle row of terminals.

[0014] Figure 7 yes Figure 1 A cross-sectional view along the dashed line AA.

[0015] Figure 8 This is a perspective view of the upper row of terminals according to the second embodiment of the present invention.

[0016] Figure 9 This is a perspective view of the lower row of terminals according to the second embodiment of the present invention.

[0017] Figure 10 yes Figure 8 A three-dimensional view from another angle.

[0018] Figure 11 yes Figure 9 A three-dimensional view from another angle.

[0019] Figure 12 This is a perspective view of the upper and lower terminal modules of the second embodiment of the invention.

[0020] Figure 13 yes Figure 12 A three-dimensional view from another angle.

[0021] Figure 14 This is a partially exploded perspective view of the electrical connector according to the third embodiment of the present invention.

[0022] Figure 15 yes Figure 14 A cross-sectional view along the dashed line BB.

[0023] Figure 16 yes Figure 14 A cross-sectional view along the dashed line CC.

[0024] Figure 17 yes Figure 14 3D view and enlarged view of the upper and lower terminal modules.

[0025] [Component Symbol Explanation]

[0026] Electrical connector 100, contact surface 211, insulating block 40

[0027] Insulating body 10, opposite surface 212, lower terminal module 40a

[0028] Docking groove 11, connecting portion 22, lower terminal module 40b

[0029] Upper side wall 12, fixing portion 221, vertical portion 401

[0030] Terminal slot 121, horizontal portion 2211, positioning post 402

[0031] Inner bottom wall 1211, bending portion 2212, longitudinal opening 403

[0032] Inner side wall 1212, vertical portion 2213, recessed portion 404

[0033] Lower side wall 13, inclined portion 2214, recessed area 406

[0034] Receiving cavity 14, inclined portion 222, opening 42

[0035] Surrounding rib 15, pin 23, reinforcing member 51

[0036] Terminal 20, wave-absorbing materials 30, 30a, 30b, 30c, 30d, metal plate surface 511

[0037] Contact portion 21, head 301, guiding portion 512

[0038] Signal terminal 20S, opening 302, gripping plate member 52

[0039] Grounding terminal 20G

[0040] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings.

Specific Embodiments

[0041] In a high-speed connector, when the excitation frequency in the circuit is equal to the natural frequency of the circuit, the amplitude of the electromagnetic oscillation in the circuit reaches a peak, and this phenomenon is called resonance. The resonance in the circuit indicates that electromagnetic waves leak at this frequency point. For signal link transmission, the greater the resonance, the greater the signal loss and interference, which should be avoided or shifted out of the target frequency band. The present invention discloses a high-frequency and high-speed electrical connector for transmission. To improve the transmission performance of high-frequency and high-speed signals, wave-absorbing materials are added at the grounding terminal. The wave-absorbing materials are lossy materials that absorb and combine the energy radiated outward by the grounding terminal, reduce the resonance of the grounding terminal, and reduce the influence on the signal terminal.

[0042] Refer Figures 1 to 7The diagram illustrates a first embodiment of the present invention. The electrical connector 100 includes an insulating body 10, terminals 20, and absorbing material 30. The insulating body 10 has a forward-through mating groove 11 and upper sidewalls 12 and lower sidewalls 13 located on either side of the mating groove. Terminal grooves 121 are provided on the upper and lower sidewalls, respectively. The terminals 20 include two rows of terminals arranged on the upper and lower sides of the mating groove 11. Each terminal 20 includes a contact portion 21, a lead 23, and a connecting portion 22 connecting the contact portion 21 and the lead 23. The contact portion 21 of each row of terminals protrudes into the mating groove 11, and the lead 23 extends out of the insulating body 10. Each row of terminals includes at least a signal terminal 20S and a ground terminal 20G. In this embodiment, a pair of signal terminals 20S are located between two ground terminals 20G. A key feature of the present invention is that the absorbing material 30 is applied to the connecting portion 22 of the ground terminal 20G, while the signal terminals 20S are not provided with absorbing material. The electric field at the connection part 22 of the grounding terminal 20G is strong, which strongly interferes with the signal terminal 20S. The absorbing material 30 can be made by adding metal powder to an insulating material, or by adding absorbent materials to a polymer; or, depending on its function, the absorbing material can be made according to its ability to weaken electrical energy or magnetic energy; or it can be made of an insulating plastic with extremely high Dk and extremely high Df coefficients, which has the property of weakening the accumulation of electromagnetic energy.

[0043] In this embodiment, the absorbing material 30 is applied to the connection portion 22 by injection molding. The absorbing material 30 is first injection molded onto the connection portion 22 of each row of grounding terminals 20G. Then, insulating blocks 40 are injection molded onto the terminals in the same row to form a terminal module. Therefore, this electrical connector includes an upper terminal module 41a and a lower terminal module 42b. The two terminal modules are stacked on top of each other and then assembled from the rear end face of the insulating body into the receiving cavity 14 provided at the rear end of the insulating body. Figure 2 As shown, the front end of the insulating block 40 abuts against the rib 15 in front of the receiving cavity. Combined with... Figure 5-7 As shown, the terminal connection portion 22 includes a fixing portion 221 embedded in the insulating block 40. The fixing portion includes a horizontal portion 2211 and a bending portion 2212. The connection portion 22 also includes an inclined portion 222 located in front of the insulating block 40. The inclined portion connects the contact portion 21 and the horizontal portion 2211. The absorbing material 30 is only applied to the horizontal portion 2211, while other parts are not covered with absorbing material. This ensures that the most severely interfered parts have absorbing material while minimizing the use of absorbing material to save costs. The terminal has a contact surface 211 and an opposite surface 212. The absorbing material 30 can be applied only to the opposite surface 212 side or the contact surface 211 side of the connection portion, depending on the actual design requirements.

[0044] In a specific embodiment, the horizontal portion 2211 of the terminals in the upper row is covered with the wave-absorbing material 30a on its upper surface; the horizontal portion of the terminals in the lower row is covered with the wave-absorbing material 30b on its upper surface. Further, the insulating block 40 is provided with an opening 42 on the other side opposite to the wave-absorbing material, and this opening increases the area where the terminals are exposed in the air, which is beneficial to the export of heat. Of course, it can also be achieved by other means, such as first forming the wave-absorbing materials 30a and 30b and then assembling them into the insulating block 40. The front end portion of the wave-absorbing material has an enlarged head 301, making its fit with the insulating block 40 closer. The insulating block 40 of the upper terminal module has a vertical portion 401, which extends to the rear of the lower terminal module 40b, so that the lower terminal module 40b is accommodated in the front lower part of the upper terminal module 40a. The lower terminal module is provided with positioning posts 402 extending upward, which are inserted into the positioning holes (not shown) of the upper terminal module, facilitating the assembly of the two. The contact portion 21 of the terminal 20 is designed with a thinner thickness. The pins of the upper row of terminals are horizontally bent backward, and the pins of the lower row of terminals are horizontally bent forward. The extending directions of the pins of the two rows of terminals are opposite.

[0045] Refer Figure 1-2 As shown, the reinforcing members 51 made of metal plates are fixed on the inner wall surfaces of the transverse two sides of the docking groove 11 of the electrical connector. The metal plate surface 511 of the reinforcing member directly faces the docking groove 11, and the front end has a guiding portion 512 inclined outward. A gripping plate member 52 is installed on the outside of the reinforcing member.

[0046] Figure 8-13 The electrical connector of the second embodiment of the present invention is shown. The structure of its insulating body and terminals is substantially the same as that of the first embodiment. The main difference is that the position and form of the portion where the wave-absorbing material 30 covers the connecting portion 22 of the grounding terminal 20G are different. The same structures are denoted by the same reference numerals. The wave-absorbing materials 30a and 30b tightly wrap around the outer periphery of the connecting portion 22 of the grounding terminal 20G, on four sides, and extend forward to the front end face of the insulating block 40 and backward along to the vicinity of the pin 23. At the same time, the wave-absorbing material is provided with openings 302 at different positions of the connecting portion 22, making the connecting portion 22 exposed. In the upper row of terminals, the wave-absorbing material 30a completely covers the connecting portion on the contact surface 211 side. On the opposite surface 212 side, there are two shorter openings 302 corresponding to the horizontal portion and one longer opening 302 corresponding to the bent portion. In the lower row of terminals, openings 302 are provided on both the contact surface and the opposite surface sides.

[0047] From Figures 12 to 13 It can be seen that the insulating block 40 is provided with longitudinal openings 403 on its upper and lower surfaces, making at least part of the connecting portion of the terminals and the wave-absorbing material exposed in the air, and the heat generated by the terminals and the wave-absorbing material can be well dissipated.

[0048] Refer Figures 14 to 16 The figure shows an electrical connector according to a third embodiment. The structure of its insulating body and terminals is largely the same as that of the first embodiment, with the main difference being the placement of the absorbing material. The insulating body has a forward-through mating groove 11 and upper sidewalls 12 and lower sidewalls 13 located on either side of the mating groove. The upper and lower sidewalls each have terminal grooves 121 for accommodating the contact portion. The terminal groove has an inner bottom wall 1211 and two inner sidewalls 1212. The absorbing materials 30c and 30d are attached to the inner bottom wall 1211 and the two inner sidewalls 1212, so that the front end of the terminal is surrounded by the absorbing material. The absorbing material has a U-shaped structure and can be injection molded onto the insulating body. If the wall thickness of the terminal groove is sufficient, it can also be fixed inside the terminal groove by assembly. The absorbing material 30 has a structure that is thinner at the front and thicker at the back. (See reference...) Figure 15 Similar to the second embodiment, the terminal connection portion 22 in this embodiment is also tightly covered with absorbing materials 30a and 30b. Compared to the second embodiment, in the third embodiment, in addition to providing absorbing materials at the connection portion 22, absorbing materials 30c and 30d are also provided around the front part of the terminal (including the contact portion 221 and the inclined portion 222).

[0049] In summary, the present invention is characterized in that at least some of the terminals are arranged in a row and include signal terminals 20S and ground terminals 20G. The connection portion 22 of the ground terminal 20G is covered or surrounded by absorbing material 30, while the signal terminal 20S is not provided with absorbing material.

[0050] In all three embodiments, the fixing portion 221 of the upper row of terminals 20 embedded in the insulating block 40 includes a horizontal portion 2212, a vertical portion 2213, and an inclined portion 2214 connecting the two. The vertical portion 2213 is embedded in the vertical portion 401 of the insulating block 40, and the inclined portion 2214 provides a positioning structure for the insulating block 40 during injection molding. To ensure better heat dissipation, the vertical portion of the insulating block 40 has a recessed area 406 on its rear end face. The recessed area 406 extends rearward and upward, so that the rear surface of the vertical portion 2214 is exposed at least within the recessed area 406. The transition area between the inclined portion 2213 and the vertical portion 2214 is also exposed within the recessed area 406. At the same time, the insulating block has a recessed portion 404 in the corresponding transition area between the inclined portion 2213 and the vertical portion 2214. The recessed portion 404 is used to position the terminals during molding, and it also helps to dissipate heat from the terminals. The recess 404 may penetrate the insulating block 40 or not. The recess 404 is formed by further indenting from the recessed area 406.

[0051] The above description represents only some embodiments of the present invention, and not all embodiments. Any equivalent modifications to the technical solutions of the present invention made by those skilled in the art through reading the specification are covered by the claims of the present invention.

Claims

1. An electrical connector comprising an insulative body, terminals located in the insulative body, and an absorbing material, at least some of the terminals being arranged in a row and comprising signal terminals and ground terminals, the terminals comprising a contact portion, a leg portion, and a connecting portion connecting the contact portion and the leg portion; characterized in that: The connection part of the grounding terminal embedded in the insulating body is coated with or surrounded by the wave-absorbing material, and the signal terminal is not provided with the wave-absorbing material. The insulating body is provided with a forwardly penetrating mating slot and upper and lower side walls located on both sides of the mating slot. The upper and lower side walls are respectively provided with terminal slots for accommodating the contact part and the part of the connection part close to the contact part. The terminal slots have an inner bottom wall and two inner side walls. The wave-absorbing material is coated on the inner bottom wall and the two inner side walls, so that the terminal is surrounded by the wave-absorbing material.

2. The electrical connector of claim 1, wherein: The wave-absorbing material is coated on the connection part by injection molding.

3. The electrical connector of claim 2, wherein: The wave-absorbing material tightly wraps around the outer periphery of the connection part.

4. The electrical connector of claim 2, wherein: The terminal has a contact surface and an opposite surface. The wave-absorbing material is only coated on the opposite surface side or the contact surface side of the connection part.

5. The electrical connector of claim 4, wherein: The connection part of the terminal includes a horizontal part, and the wave-absorbing material is only located on the horizontal part.

6. The electrical connector of claim 4, wherein: The electrical connector includes an insulating block injection molded on the outside of the connection part of the terminal. The insulating block is provided with an opening on the other side relative to the wave-absorbing material, so that part of the terminal is exposed in the opening.

7. The electrical connector of claim 1, wherein: The insulating body is provided with a forwardly penetrating mating slot. The terminal includes two rows of terminals arranged on the upper and lower sides of the mating slot, respectively. The contact part of each row of terminals protrudes into the mating slot. The connection part of the grounding terminal of each row of terminals is first injection molded with the wave-absorbing material, and then the terminals in the same row are injection molded with an insulating block to form a terminal module.

8. The electrical connector of claim 7, wherein: The connection part of the terminal includes a fixed part embedded in the insulating block. The fixed part includes a horizontal part and a bent part. The wave-absorbing material is only coated on the horizontal part. The horizontal part of the terminal in the upper row is coated with the wave-absorbing material on the upper surface thereof. The horizontal part of the terminal in the lower row is coated with the wave-absorbing material on the upper surface thereof.

9. The electrical connector of claim 8, wherein: The wave-absorbing material tightly wraps around the outer periphery of the connection part and extends forwardly to the front end surface of the insulating block and backwardly to the adjacent contact leg.

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