High-frequency high-speed connector

Abstract

The invention discloses a high-frequency high-speed connector, which is used for fixedly holding a flexible flat cable so as to enable the flexible flat cable to be electrically connected with a circuit board, and comprises a base, a metal bottom shell and a metal cover body, the base comprises an insulating body and a plurality of connecting terminals, two ends of each connecting terminal are respectively a fixed end and a contact end, and each connecting terminal is not provided with a divergent structure from the fixed end to the contact end. The metal bottom shell and the insulating body are mutually fixed; any part of the metal bottom shell is not located under each connecting terminal. The metal cover body is rotatably connected with the metal bottom shell. When the metal cover body and the metal bottom shell jointly hold the flexible flat cable, the plurality of grounding elastic arms of the metal bottom shell are contacted with the plurality of grounding pins of the flexible flat cable, and other pins of the flexible flat cable are contacted with the plurality of connecting terminals.

Description

Technical Field

[0001] The invention relates to a connector, in particular to a high-frequency and high-speed connector for fixing a flexible flat cable. Background Art

[0002] In response to the high-speed and high-frequency transmission requirements of connectors, existing common connectors used to fix and connect flexible flat cables have the problem of difficulty in reducing the dB value of near-end crosstalk and the dB value of far-end crosstalk in high-frequency applications. Summary of the invention

[0003] The invention discloses a connector mainly used to improve the existing connector for fixing and connecting flexible flat cables, which has the problem that the dB value of near-end crosstalk and the dB value of far-end crosstalk are difficult to reduce in the high-frequency application range.

[0004] One embodiment of the present invention discloses a high-frequency and high-speed connector, which is used to be fixed on a circuit board, and the high-frequency and high-speed connector is used to hold a flexible flat cable so that the flexible flat cable is electrically connected to the circuit board. The high-frequency and high-speed connector includes: a base, which includes an insulating body and a plurality of connecting terminals, a portion of the plurality of connecting terminals is fixed to the insulating body, the two ends of each connecting terminal are respectively a fixed end and a contact end, and each connecting terminal does not have a divergent structure from the fixed end to the contact end; a metal bottom shell, one side of which is fixed to the insulating body, and the other side of the metal bottom shell is provided with a plurality of grounding spring arms; any part of the metal bottom shell is not located in an orthographic projection area of ​​the orthographic projection of each connecting terminal in the direction of the insulating body; a metal cover body, which is rotatably connected to the metal bottom shell; wherein, when the metal cover body and the metal bottom shell jointly hold the flexible flat cable, the plurality of grounding spring arms will contact the plurality of grounding pins of the flexible flat cable, and the other pins of the flexible flat cable will contact the plurality of connecting terminals.

[0005] Preferably, the dB value of near-end crosstalk (NEXT) of the high-frequency high-speed connector is less than -40 dB in the frequency range of 0 to 20 GHz.

[0006] Preferably, the high-frequency high-speed connector has a far-end crosstalk (FEXT) dB value less than -40 dB in the frequency range of 0 to 20 GHz.

[0007] Preferably, the dB value of the return loss of the high-frequency high-speed connector in the frequency range of 0 to 20 GHz is less than -15 dB.

[0008] Preferably, when the metal bottom shell and the insulating body are fixed to each other, each first fixing structure and each second fixing structure are fixed to each other, and the upper auxiliary fixing structure and the lower auxiliary fixing structure located on the same side clamp the insulating body together.

[0009] Preferably, the metal bottom shell is formed by bending a metal sheet, and the metal bottom shell includes a bottom plate, two side structures and a top plate, the two ends of the bottom plate are respectively connected to the lower position of one end of the two side structures, and the two ends of the top plate are respectively connected to the upper position of the other end of the two side structures; the bottom plate has a plurality of grounding spring arms; each side structure includes a first fixing structure and a lower auxiliary fixing structure; the top plate includes two upper auxiliary fixing structures and a plurality of first reinforced fixing structures, the plurality of first reinforced fixing structures are arranged at intervals from each other, and the plurality of first reinforced fixing structures are used to be fixed to each other with the plurality of second reinforced fixing structures of the insulating body; wherein, when the metal bottom shell and the base are fixed to each other, the top plate is located above the plurality of connecting terminals, the two side structures are respectively located on both sides of the insulating body, and the bottom plate is not located below the plurality of connecting terminals.

[0010] Preferably, each side structure also includes a guide structure, the two guide structures are arranged facing each other, and the two guide structures are used to guide the flexible flat cable into between the metal cover and the metal bottom shell; the two ends of the bottom plate also have multiple welding structures, and the multiple welding structures are used to weld and fix the metal bottom shell to the circuit board.

[0011] Preferably, each guiding structure further includes a limiting structure, and the two limiting structures are used to jointly limit the rotation range of the metal cover relative to the metal base.

[0012] Preferably, each side structure also includes a pivotal portion and a snap-fit ​​portion, the two pivotal portions are arranged adjacent to the bottom plate, and the two snap-fit ​​portions are arranged adjacent to the top plate; the two pivotal portions are used to be pivotally connected to the two pivotal portions of the metal cover body so that the metal cover body can rotate relative to the metal bottom shell; the two snap-fit ​​portions are used to be fixed to the two snap-fit ​​portions of the metal cover body so as to jointly limit the range of movement of the metal cover body and the metal bottom shell.

[0013] Preferably, the insulating body includes a base, a stopper, two side limiting structures and an intermediate limiting structure, the base includes a plurality of terminal grooves, each terminal groove accommodates a connecting terminal, the two side limiting structures are respectively located on both sides of the insulating body, the stopper is connected to one side of the base, and the two side limiting structures and the intermediate limiting structure are located above the base, a side receiving groove is formed between each side limiting structure and the base, the two ends of the intermediate limiting structure are connected to the two side limiting structures, and the intermediate limiting structure, the stopper and the base jointly form a front end limiting groove; when the flexible flat cable is inserted into the high-frequency and high-speed connector, the flexible flat cable is correspondingly located in the two side receiving grooves and the front end limiting groove, and the two side limiting structures and the intermediate limiting structure correspondingly press against the flexible flat cable, so that multiple pins of the flexible flat cable are connected to multiple connecting terminals.

[0014] Preferably, the metal cover comprises a sheet-like body and at least two elastic structures, one end of each elastic structure is connected to the sheet-like body, and the other end opposite to each elastic structure has a guide portion; wherein, when the metal cover is in a closed position, there is an insertion gap between the metal cover and the base, and the two guide portions are correspondingly located in the insertion gap; when the metal cover is in the closed position and the flexible flat cable is inserted into the metal cover and the base, the two elastic structures will be elastically deformed in a direction away from the sheet-like body due to the two guide portions being pushed by the flexible flat cable.

[0015] Preferably, each elastic structure includes an L-shaped elastic arm and a guide portion, each L-shaped elastic arm includes a longitudinal section extending along a longitudinal direction and a transverse section extending along a transverse direction, one end of the longitudinal section is connected to the sheet-like body, the longitudinal direction is roughly parallel to an insertion direction of the flexible flat cable into the high-frequency and high-speed connector, the longitudinal direction is roughly perpendicular to the transverse direction, one end of the transverse section is connected to the other end of the longitudinal section, and the other end of the transverse section extends downward to form a guide portion.

[0016] Preferably, the metal cover is formed by bending a metal sheet, the metal cover includes an upper sheet and a lower sheet, the lower sheet is formed by bending the upper sheet to one side, and the upper sheet is connected to one end of each elastic structure; the metal cover also includes a plurality of resisting elastic arms, one end of each resisting elastic arm is connected to the lower sheet, and the other end of each resisting elastic arm is a free end; two guide parts are located on both sides of the lower sheet, and each guide part protrudes further from a lower side surface of the lower sheet than each resisting elastic arm; wherein each resisting elastic arm is used to resist the flexible flat cable located between the metal cover and the base.

[0017] Preferably, the two sides of the metal cover body respectively have a pivotal portion and a locking portion, the two pivotal portions of the metal cover body are used to connect with the two pivotal portions of the metal bottom shell, so that the metal cover body can rotate relative to the metal bottom shell; the two locking portions of the metal cover body are used to lock with the two locking portions of the metal bottom shell to limit the range of movement of the metal cover body and the metal bottom shell.

[0018] In summary, the high-frequency and high-speed connector of the present invention can achieve the technical effect of having a relatively low near-end crosstalk dB value and a relatively low far-end crosstalk dB value in the application range of high frequency and high speed through the design that no part of the metal bottom shell is located in an orthographic projection area of ​​each connecting terminal in the direction of the insulating body, and each connecting terminal does not have a divergent structure from the fixed end to the contact end.

[0019] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, such description and drawings are only used to illustrate the present invention and are not intended to limit the protection scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 and Figure 2 Schematic diagrams of the high-frequency and high-speed connector of the present invention from different viewing angles.

[0021] Figure 3 It is a partial exploded schematic diagram of the high-frequency and high-speed connector of the present invention.

[0022] Figure 4 It is a schematic diagram of another viewing angle of the metal cover of the high-frequency and high-speed connector of the present invention.

[0023] Figure 5 It is a schematic diagram of the exploded view of the metal bottom shell and the base of the high-frequency and high-speed connector of the present invention.

[0024] Figure 6 It is a schematic diagram of another viewing angle of the base of the high-frequency and high-speed connector of the present invention.

[0025] Figure 7 It is a partial cross-sectional schematic diagram of the base of the high-frequency and high-speed connector of the present invention.

[0026] Figure 8 The high-frequency high-speed connector of the present invention is Figure 1 A cross section along section line VIII-VIII and a schematic diagram of the flexible flat cable are shown.

[0027] Fig. 9 It is a schematic diagram of the process of inserting a flexible flat cable into the high-frequency and high-speed connector of the present invention.

[0028] Fig.10 This is a schematic diagram of a flexible flat cable after being inserted into the high-frequency and high-speed connector of the present invention.

[0029] Fig.11 It is a partial cross-sectional schematic diagram of a high-frequency and high-speed connector of the present invention with a flexible flat cable inserted therein and a metal cover lifted up.

[0030] Fig.12 FIG. 4 is a schematic diagram of another embodiment of a high-frequency and high-speed connector of the present invention.

[0031] Fig.13 The figure is a graph showing the variation of the dB value of the near end crosstalk (NEXT) of the high frequency and high speed connector of the present invention at different frequencies.

[0032] Fig.14 The figure is a graph showing the dB value variation of the far end crosstalk (FEXT) of the high frequency and high speed connector of the present invention at different frequencies.

[0033] Fig.15FIG. 4 is a graph showing the change in dB value of the return loss of the high-frequency and high-speed connector of the present invention at different frequencies. DETAILED DESCRIPTION

[0034] In the following description, if it is indicated to refer to a specific figure or as shown in a specific figure, it is only used to emphasize that most of the related content described in the subsequent description appears in the specific figure, but it does not limit the subsequent description to only refer to the specific figure.

[0035] Please also read Figures 1 to 4 , Figure 1 and Figure 2 Schematic diagrams of the high-frequency and high-speed connector of the present invention from different viewing angles, Figure 3 It is a partial exploded schematic diagram of the high-frequency and high-speed connector of the present invention, Figure 4 It is a schematic diagram of another viewing angle of the metal cover of the high-frequency and high-speed connector of the present invention.

[0036] The high-frequency high-speed connector 100 of the present invention is used to be fixed on a circuit board, and the high-frequency high-speed connector 100 is used to hold a flexible flat cable (Flexible Flat Cable, FFC) 200, so that the flexible flat cable 200 is electrically connected to the circuit board. In practical applications, the high-frequency high-speed connector 100 can be applied to USB 4.0 specifications, PCLE specifications with a bandwidth of more than 16G, DIsplay Port specifications with a bandwidth of more than 8.1G, etc. It should be noted that the flexible flat cable cited in this embodiment is a high-speed flexible flat cable, and the dielectric constant of this high-speed flexible flat cable is different from the dielectric constant of a general flexible flat cable. Therefore, the two flexible flat cables have completely different signal transmission requirements for the connector.

[0037] The high-frequency and high-speed connector 100 includes: a metal cover 1, a metal bottom shell 3 and a base 5. The metal cover 1 is rotatably connected to the metal bottom shell 3, and the metal bottom shell 3 and the base 5 are fixed to each other. The metal cover 1 is, for example, detachably fixed to the metal bottom shell 3. In practical applications, the metal bottom shell 3 can be fixed to the circuit board by welding or the like, and grounded through the circuit board. The base 5 includes an insulating body 51 and a plurality of connecting terminals 53. One end of the plurality of connecting terminals 53 can be fixed to the circuit board by welding, for example. In practice, the metal cover 1 and the metal bottom shell 3 can be made of, for example, stainless steel material (such as SUS 304, etc.), but is not limited thereto.

[0038] The metal cover 1 includes, for example, a sheet-shaped body, two elastic structures 15 and three elastic arms 17. The number of elastic structures 15 and the number of elastic arms 17 included in the metal cover 1 are not limited to those shown in the figure. In a preferred application, the metal cover 1 is made of, for example, a sheet of metal through laser cutting, bending and other processing procedures.

[0039] The sheet body includes, for example, an upper sheet 11 and a lower sheet 13. The upper sheet 11 and the lower sheet 13 are formed by bending the same sheet metal, that is, the lower sheet 13 can be formed by bending one side of the upper sheet 11 downward. The upper sheet 11 includes, for example, two pivoting portions 111 and two engaging portions 112, and two elastic structures 15 are disposed on the upper sheet 11.

[0040] Each elastic structure 15 includes, for example, an L-shaped elastic arm 151 and a guide portion 152. One end of the L-shaped elastic arm 151 is connected to the upper sheet 11, and the other end of the L-shaped elastic arm 151 is a free end, and the free end of the L-shaped elastic arm 151 can extend downward to form a guide portion 152. Each elastic structure 15 is, for example, integrally formed with the upper sheet 11.

[0041] The L-shaped elastic arm 151 may include, for example, a longitudinal section 151A and a transverse section 151B. One end of the longitudinal section 151A is connected to the upper sheet 11, and the other end of the longitudinal section 151A is connected to the transverse section 151B. The longitudinal section 151A is, for example, a part of the upper sheet 11 extending along a longitudinal direction, and the transverse section 151B is formed by extending one end of the longitudinal section 151A along a transverse direction. The longitudinal direction is, for example, a direction of insertion roughly parallel to the flexible flat cable 200 into the high-frequency high-speed connector 100. Each guide portion 152 may be formed by extending downward from one end of the transverse section 151B opposite to the longitudinal section 151A. The longitudinal section 151A and the transverse section 151B may be, for example, roughly located on the same plane, while the guide portion 152 may be located on another plane, and the two planes may be perpendicular to each other.

[0042] It should be noted that in the drawings of this embodiment, the elastic arms included in each elastic structure 15 are taken as L-shaped, but the shape of the elastic structure 15 is not limited thereto. In different embodiments, the elastic structure 15 can be, for example, I-shaped.

[0043] like Figure 4 As shown, each guide portion 152 faces the direction of insertion of the flexible flat cable 200, and may include, for example, a guide slope 1521, whereby, when the flexible flat cable 200 is inserted into the high-frequency and high-speed connector 100, after the flexible flat cable 200 pushes against each guide slope 1521, each L-shaped elastic arm 151 will be elastically deformed.

[0044] The two sides of the upper sheet 11 may include a pivoting portion 111 and a locking portion 112 respectively. The metal cover 1 is pivotally connected to the two pivoting portions 337 of the metal bottom shell 3 through the two pivoting portions 111, so that the metal cover 1 can be operated to rotate relative to the metal bottom shell 3. The shape, size and setting position of the pivoting portion 111 of the upper sheet 11 are not limited to those shown in the figure. As long as the two pivoting portions 111 of the upper sheet 11 can be pivotally connected to the two pivoting portions 337 of the metal bottom shell 3, and the upper sheet 11 can be operated to rotate relative to the metal bottom shell 3, the shape and size of the pivoting portion 111 of the upper sheet 11 and the pivoting portion 337 of the metal bottom shell 3 are not limited to those shown in the figure.

[0045] The two engaging portions 112 of the upper sheet 11 are used to engage with the two engaging portions 338 of the metal bottom shell 3, thereby limiting the range of movement of the upper sheet 11 relative to the metal bottom shell 3. For example, each engaging portion 112 of the upper sheet 11 can be a hemispherical structure, and each engaging portion 338 of the metal bottom shell 3 is a circular perforation. When the metal cover 1 is in a closed position (such as Figure 1 3), a part of the hemispherical structure will be correspondingly disposed in the circular through hole, and the range of motion of the metal cover 1 and the metal bottom shell 3 will be limited accordingly. In contrast, when the metal cover 1 is in the closed position, if the upper sheet 11 is operated and rotated in a direction away from the metal bottom shell 3, the two engaging portions 112 of the metal cover 1 will be disengaged from the two engaging portions 338 of the metal bottom shell 3, and the metal cover 1 will be able to rotate relative to the metal bottom shell 3. The appearance, size and location of the engaging portions 112 of the upper sheet 11 and the engaging portions 338 of the metal bottom shell 3 are not limited to those shown in the figure.

[0046] like Figure 4 As shown, one end of each elastic arm 17 is connected to the lower sheet 13, and the other end of each elastic arm 17 is a free end, and each elastic arm 17 is formed integrally with the lower sheet 13. When the free end of each elastic arm 17 is compressed, it will be elastically deformed. Each elastic arm 17 is used to push against a top surface of the flexible flat cable 200 inserted into the high-frequency high-speed connector 100. In one embodiment, each elastic arm 17 can be used to contact the ground pin of the flexible flat cable 200. It is worth mentioning that the two guide portions 152 can be correspondingly located on both sides of the lower sheet 13, and each guide portion 152 is more protruding from the lower side surface 131 of the lower sheet 13 than each elastic arm 17, thereby ensuring that the flexible flat cable 200 is preferentially pushed against the two guide portions 152 during the process of inserting the flexible flat cable 200 into the high-frequency high-speed connector 100.

[0047] Please also read Figures 5 to 7 , Figure 5 This is an exploded schematic diagram of the metal bottom shell and base of the high-frequency and high-speed connector of the present invention. Figure 6 FIG. 1 is a schematic diagram of another perspective of the base of the high-frequency high-speed connector of the present invention, Figure 7 It is a partial cross-sectional schematic diagram of the base of the high-frequency and high-speed connector of the present invention.

[0048] The metal bottom shell 3, for example, includes a bottom plate 31, two side structures 33 and a top plate 35, and the bottom plate 31, the two side structures 33 and the top plate 35 can be arranged in an integral manner. The bottom plate 31 includes a bottom plate body 311 and three grounding elastic arms 312. One end of each grounding elastic arm 312 is connected to the bottom plate body 311, and the other end of each grounding elastic arm 312 is a free end. When the free end of each grounding elastic arm 312 is subjected to force, it will be elastically deformed. In practical applications, the bottom plate body 311 and the two grounding elastic arms 312 can be arranged in an integral manner. Each grounding elastic arm 312 is used to contact the grounding pin of the flexible flat cable 200 inserted in the high-frequency high-speed connector 100. The number and location of the grounding elastic arms 312 included in the metal bottom shell 3 can be designed according to the number and location of the grounding pins of the flexible flat cable 200 in practical applications, and is not limited to those shown in the figure.

[0049] The bottom plate 31 is connected to the lower part of one end of the two side structures 33, and the top plate 35 is connected to the upper part of the other end of the two side structures 33, and there is no bottom plate 31 directly below the top plate 35. In other words, the metal bottom shell 3 does not have any structure belonging to the metal bottom shell 3 directly below the top plate 35.

[0050] Each side structure 33 includes, for example, a side bottom 331, a lower auxiliary fixing structure 332, a first fixing structure 333, a guiding structure 334, a limiting structure 335, a plurality of welding structures 336, a pivoting portion 337, and a locking portion 338. The lower auxiliary fixing structure 332 can be formed by extending from one side of the side bottom 331, and the first fixing structure 333 can be formed by bending upward from one side of the lower auxiliary fixing structure 332. The two first fixing structures 333 are used to cooperate with the two second fixing structures 5112 of the base 5, so as to fix the metal bottom shell 3 and the base 5 to each other. In the drawings of the present embodiment, each first fixing structure 333 is an upright sheet structure and the second fixing structure 5112 is a groove structure, but the specific appearance of the first fixing structure 333 and the second fixing structure 5112 is not limited thereto. In one embodiment, each first fixing structure 333 and the second fixing structure 5112 can be fixed to each other in a tight fit manner, for example. Each side bottom 331 is opposite to an end where the first fixing structure 333 is formed, and can be connected to one end of the bottom plate 31 , for example.

[0051] Each lower auxiliary fixing structure 332 is used to cooperate with an upper auxiliary fixing structure 351 of the top plate 35 located on the same side to jointly hold an insulating body 51 of the base 5. In practical applications, the vertical distance between the lower auxiliary fixing structure 332 and the upper auxiliary fixing structure 351 located on the same side can be, for example, slightly smaller than the height of the insulating body 51, and the lower auxiliary fixing structure 332 and the upper auxiliary fixing structure 351 located on the same side can hold the insulating body 51 in a tight fit.

[0052] In addition, through the design of the upper auxiliary fixing structure 351 and the lower auxiliary fixing structure 332, in addition to strengthening the connection strength between the metal bottom shell 3 and the base 5, the metal bottom shell 3 can be further prevented from being deformed, especially when the metal bottom shell 3 is made of a single relatively thin metal sheet.

[0053] The guide structure 334 can be formed by bending one side of the side bottom 331 upward, and the end of the guide structure 334 away from the side bottom 331 can be extended to form the limiting structure 335. Each guide structure 334 can have a limiting plane 3341 and a guiding inclined surface 3342, and the distance between the two limiting planes 3341 is substantially equal to the width of the flexible flat cable 200. The two guiding inclined surfaces 3342 are used to correct the position of the flexible flat cable 200 when it is inserted, so that the flexible flat cable 200 can move to the correct insertion position during the insertion process. The two limiting structures 335 are used to limit the rotation range of the metal cover 1 relative to the metal bottom shell 3 together, which will be described in detail below.

[0054] The side of each side bottom plate 31 opposite to the side where the guide structure 334 is formed may be bent upward to form a support structure, and the pivoting portion 337 is formed on the support structure. The side of each side bottom 331 opposite to the side where the pivoting portion 337 is formed may be bent upward to form a support structure, and the support structure may be formed with a snap-fit ​​portion 338, and the support structure may also be connected to one end of the top plate 35. In practical applications, the two pivoting portions 337 may be provided on one side close to the bottom plate 31, and the two snap-fit ​​portions 338 may be provided on one side close to the top plate 35.

[0055] Each side bottom 331 opposite to the side connected to the bottom plate 31 may be formed with a plurality of welding structures 336. The plurality of welding structures 336 of the metal bottom shell 3 may be fixed to the circuit board by welding, for example.

[0056] In practical applications, the top plate 35 may include, for example, a plurality of first reinforcing fixing structures 352, which are used to cooperate with a plurality of second reinforcing fixing structures 517 of the insulating body 51 to strengthen the connection strength between the metal bottom shell 3 and the base 5. In practical applications, each first reinforcing fixing structure 352 and each second reinforcing fixing structure 517 may be fixed to each other in a tight fit. In practical applications, the number of the first reinforcing fixing structures 352 and the second fixing structures 5112 included in the top plate 35 and the insulating body 51, respectively, may be changed according to actual needs and is not limited to those shown in the figure.

[0057] The description of the arrangement positions of the various components included in the metal bottom shell 3 of the present embodiment is only an example of the actual application of the metal bottom shell 3. In actual application, the specific connection relationship and arrangement positions of the various structures included in the metal bottom shell 3 are not limited to the above description and the figures. In addition, it should be emphasized that if the various structures included in the metal bottom shell 3 are manufactured as shown in the above description and the figures, the metal bottom shell 3 can be manufactured using a single piece of metal with the cooperation of laser, cutting, bending and other processing.

[0058] like Figures 5 to 7 As shown, the base 5 may include, for example, an insulating body 51 and a plurality of connecting terminals 53. The base 5 may include, for example, a base 511, a stopper 512, two side limiting structures 513, a middle limiting structure 514, two side containing grooves 515, a front limiting groove 516 and three second reinforcing fixing structures 517.

[0059] One side of the base 511 is concave to form a plurality of terminal grooves 5111. The two ends of each connection terminal 53 are a fixed end 531 and a contact end 532, and each connection terminal 53 does not have a divergent structure from the fixed end 531 to the contact end 532. In other words, except for a portion of the contact end 532 of each connection terminal 53 that is curved for welding requirements, the remaining sections of the connection terminal 53 are generally in a rectangular column-like structure, and each connection terminal 53 is not in a Y-shaped structure.

[0060] The fixed end 531 of each connection terminal 53 is exposed at one side of the base 5, and each fixed end 531 is used to be fixed to the circuit board. The contact end 532 of each connection terminal 53 is a free end, and the contact end 532 of the connection terminal 53 will be elastically deformed when subjected to external force. A portion of the contact end 532 of each connection terminal 53 is correspondingly located in one of the terminal grooves 5111. Each contact end 532 is used to contact the pin of the flexible flat cable 200.

[0061] In practical applications, each connecting terminal 53 can be fixed to the insulating body 51 in a tight fit, for example, but not limited to this. In different embodiments, the insulating body 51 can also be formed by inserting multiple connecting terminals 53 into the outside of the insulating body 51 by insert molding.

[0062] The stopper 512 is connected to one side of the base 511, two side limiting structures 513 are located on both sides of the insulating body 51, and the two side limiting structures 513 and the middle limiting structure 514 are located above the base 511, and a side receiving groove 515 is formed between each side limiting structure 513 and the base 511, and both ends of the middle limiting structure 514 are connected to the two side limiting structures 513, and the middle limiting structure 514, the stopper 512 and the base 511 jointly form a front-end limiting groove 516. The two side containing grooves 515 and the front-end limiting groove 516 are interconnected, and are used to provide the flexible flat cable 200 for insertion. The stopper 512 is suitable for stopping the end of the flexible flat cable 200 to limit the flexible flat cable 200 from moving forward.

[0063] The two side limiting structures 513 and the middle limiting structure 514 can be rectangular sheet structures respectively, and the three can be interconnected to form a structure similar to an inverted U shape. This inverted U shape structure can be used to resist the top of the flexible flat cable 200 inserted into the high-frequency and high-speed connector 100, thereby effectively limiting the flexible flat cable 200 to the range of movement in the high-frequency and high-speed connector 100, so as to prevent the flexible flat cable 200 from loosening and deforming, and also ensure that the flexible flat cable 200 is in continuous and effective contact with the multiple connection terminals 53.

[0064] like Figure 2 As shown, it should be particularly emphasized that any part of the metal bottom shell 3 is not located in an orthographic projection area of ​​each connection terminal 53 in the direction of the insulating body 51, that is, no part of the metal bottom shell 3 exists directly below each connection terminal 53. In practical applications, the bottom surface 511A of the insulating body 51 may not be completely shielded by the metal bottom shell 3, and after the high-frequency and high-speed connector 100 is fixed on the circuit board, there is no metal bottom shell 3 between the bottom surface 511A of the insulating body 51 and the circuit board.

[0065] Please also read Figure 1 , Figures 8 to 10 , Figure 8 The high-frequency high-speed connector of the present invention is Figure 1 The cross section along the section line VIII-VIII and the schematic diagram of the flexible flat cable are shown, Fig. 9 It is a schematic diagram of the process of inserting the flexible flat cable into the high-frequency high-speed connector of the present invention, Fig.10This is a schematic diagram of a flexible flat cable after being inserted into the high-frequency and high-speed connector of the present invention.

[0066] like Figure 1 and Figure 8 As shown, when the flexible flat cable 200 is not inserted into the high-frequency high-speed connector 100 and the metal cover 1 is in the closed position, the engaging portion 112 (eg Figure 3 ) is the engaging portion 338 (as shown in FIG. Figure 3 As shown in the figure, the metal cover 1 and the base 5 are engaged with each other. At this time, there is an insertion gap S between the metal cover 1 and the base 5, and the two guide portions 152 are correspondingly located in the insertion gap S.

[0067] like Figure 8 and Fig. 9 As shown, when the user wants to insert the flexible flat cable 200 into the high-frequency high-speed connector 100, the user does not need to lift the metal cover 1, and the user can directly insert the flexible flat cable 200 into the high-frequency high-speed connector 100. Figure 1 In the high-frequency and high-speed connector 100 shown in FIG. 1 , when the flexible flat cable 200 is inserted into the insertion gap S, the flexible flat cable 200 will push against the two guide portions 152, and the L-shaped elastic arms 151 connected to the guide portions 152 will be elastically deformed in a direction away from the flexible flat cable 200. As the L-shaped elastic arms 151 are elastically deformed in a direction away from the flexible flat cable 200, the guide portions 152 will no longer be located in the insertion gap S, and the flexible flat cable 200 can continue to move toward the stop portion 512 until it reaches the stop portion 512.

[0068] As described above, the high-frequency and high-speed connector 100 of the present invention allows the user to directly insert the flexible flat cable 200 into the high-frequency and high-speed connector 100 without lifting the metal cover 1 by making the metal cover 1 include the elastic structure 15 and making each elastic structure 15 have an elastic arm and a guide portion. In this way, the convenience of assembling the flexible flat cable 200 and the high-frequency and high-speed connector 100 can be greatly improved.

[0069] In the prior art, when a user wants to insert a flexible flat cable into a connector, the user must first open the cover of the connector before inserting the flexible flat cable. If the cover is not opened, the user cannot insert the flexible flat cable into the connector. In actual applications, when a user uses a known connector, whether to connect or separate the flexible flat cable from the connector, the user must operate the cover. Therefore, the cover is prone to breakage after long-term use, especially at the hinge of the cover. If the hinge of the cover breaks, the connector will basically be unusable.

[0070] As mentioned above, the cover of the known connector is made of plastic, and the user needs to operate the cover whether to connect or separate the flexible flat cable from the connector, so in practice, the cover often breaks due to improper operation by the user. On the other hand, the metal cover 1 of the high-frequency and high-speed connector 100 of the present invention is made of metal material, and its overall strength is significantly better than that of the known plastic cover, and through the design of the elastic structure 15, the user can directly insert the flexible flat cable 200 into the high-frequency and high-speed connector 100 without lifting the metal cover 1. Therefore, the high-frequency and high-speed connector 100 of the present invention has the advantages of the metal cover 1 not being easy to break and being easy to use, compared with the known connector with a plastic cover, through the design of the metal cover 1.

[0071] In addition, it should be emphasized that, for conventional connectors with plastic covers, when manufacturers reduce the overall size of the connector to meet customer needs, the overall thickness of the plastic cover will also become thinner, and the plastic cover is more likely to be damaged due to improper operation. In contrast, the metal cover 1 included in the high-frequency and high-speed connector 100 of the present invention has a significantly better overall structural strength than the conventional plastic cover when the metal cover 1 has the same thickness as the conventional plastic cover (e.g., less than 15 mm).

[0072] like Fig. 9 and Fig.10 As shown, when one end of the flexible flat cable 200 hits the stopper 512, the two side notches 201 of the flexible flat cable 200 will be located correspondingly below the guide portion 152, and the guide portion 152 will no longer hit the flexible flat cable 200, thereby, the L-shaped elastic arm 151 will elastically return to its original state, and the two guide portions 152 will be located correspondingly in the corresponding side notches 201. The guide portions 152 located in the side notches 201 can be used to limit the flexible flat cable 200 from being separated from the high-frequency and high-speed connector 100.

[0073] like Fig. 9 and Fig.10As shown, it is worth mentioning that, through the design that each L-shaped elastic arm 151 includes a longitudinal section 151A and a transverse section 151B and one end of the transverse section 151B is connected to the guide portion 152, each L-shaped elastic arm 151 can be relatively easily elastically deformed in a direction away from the flexible flat cable 200 when pushed by the flexible flat cable 200, and after the flexible flat cable 200 is successfully inserted into the high-frequency and high-speed connector 100, through the design that a part of the guide portion 152 corresponds to the side notch 201 of the flexible flat cable 200, it can further assist in limiting the range of movement of the flexible flat cable 200 relative to the metal cover 1, especially when the flexible flat cable 200 is pulled by an external force, it can effectively assist in limiting the range of movement of the flexible flat cable 200 relative to the high-frequency and high-speed connector 100.

[0074] See also Fig.11 , which is a partial cross-sectional schematic diagram of the high-frequency high-speed connector of the present invention with a flexible flat cable inserted and the metal cover lifted. After the flexible flat cable 200 is inserted into the high-frequency high-speed connector 100, when the user wants to separate the flexible flat cable 200 from the high-frequency high-speed connector 100, the user needs to rotate the metal cover 1 in a direction away from the base 5, so that the metal cover 1 rotates relative to the base 5 with the pivot portion 111 as the center, thereby allowing the metal cover 1 to no longer press the flexible flat cable 200, allowing the user to pull the flexible flat cable 200 out of the base 5.

[0075] When the metal cover 1 is operated to rotate in a direction away from the base 5, when the metal cover 1 rotates to a predetermined angle, the top surface of the metal cover 1 will abut against the two limiting structures 335 of the metal bottom shell 3, thereby preventing the metal cover 1 from rotating in a direction away from the base 5. In other words, the design of the two limiting structures 335 can effectively limit the rotation angle of the metal cover 1 relative to the base 5, thereby preventing the metal cover 1 from being damaged by improper operation.

[0076] See also Fig.12 , which is a schematic diagram of another embodiment of the high-frequency and high-speed connector of the present invention. The biggest difference between this embodiment and the aforementioned embodiment is that the metal cover body 1 also includes an auxiliary operation portion 113. The auxiliary operation portion 113 can be formed by extending outward from one side of the upper sheet 11, for example. Preferably, the auxiliary operation portion 113 is a side of the base 5 that protrudes and exposes a fixed end 531 with a plurality of connection terminals 53. The auxiliary operation portion 113 is used to provide user operation so that the user can more easily lift the metal cover body 1 in a direction away from the base 5. The setting position and appearance of the auxiliary operation portion 113 can be changed according to actual needs and are not limited to those shown in the figure.

[0077] Please also read Figure 2 , Figure 8 , Figures 13 to 15 , Fig.13 The figure is a graph showing the change in dB value of the near end crosstalk (NEXT) of the high frequency high speed connector of the present invention at different frequencies. Fig.14 The figure is a graph showing the dB value variation of the Far End Cross Talk (FEXT) of the high-frequency high-speed connector of the present invention at different frequencies. Fig.15 FIG. 4 is a graph showing the change in dB value of the return loss of the high-frequency and high-speed connector of the present invention at different frequencies.

[0078] The high-frequency and high-speed connector 100 of the present invention is designed so that no part of the metal bottom shell 3 is located in an orthographic projection area of ​​the orthographic projection of each connecting terminal 53 in the direction of the insulating body 51, and the design is designed so that each connecting terminal 53 does not have a divergent structure from the fixed end 531 to the contact end 532. This allows the high-frequency and high-speed connector 100 to achieve the following effects: in the frequency range of 0 to 20 GHz, the dB value of the near-end crosstalk (S3, 1) is less than -40 dB, and in the frequency range of 0 to 20 GHz, the dB value of the far-end crosstalk (S4, 1) is less than -40 dB.

[0079] like Fig.13 As shown in the experimental line segment indicated in FIG. , if the bottom surface 511A of the base 5 (such as Figure 2 As shown in the figure, if the connector is completely covered by the metal bottom shell 3, the dB value of the near-end crosstalk (S3,1) of this connector in the frequency range of 0 to 20 GHz cannot be less than -40 dB, and therefore, it cannot meet the requirements of high-frequency and high-speed connectors. Fig.14 As shown in the experimental line segment indicated in FIG. , if the bottom surface 511A of the base 5 (such as Figure 2 As shown in the figure, if the connector is completely covered by the metal bottom shell 3, the dB value of the far-end crosstalk (S4,1) of this connector in the frequency range of 0 to 20 GHz cannot be less than -40 dB, and therefore, it cannot meet the requirements of high-frequency and high-speed connectors.

[0080] It should be particularly emphasized that in the technical field of connectors, there are: technical biases of covering the periphery of a base including terminals with a metal shell, and technical biases of making the connection terminal include a divergent structure to use the divergent structure to fix the connection terminal and the base to each other. The inventor of the present application has overcome those technical biases through repeated experiments and verifications, and invented the high-frequency high-speed connector of the present application, by making any part of the metal bottom shell 3 not located in an orthographic projection area of ​​the orthographic projection of each connection terminal 53 in the direction of the insulating body 51, and making each connection terminal 53 not have a divergent structure from the fixed end 531 to the contact end 532, so that the high-frequency high-speed connector can achieve: in the frequency range of 0 to 20 GHz, the dB value of the near-end crosstalk (NEXT) and the dB value of the far-end crosstalk (FEXT) are both less than -40 dB. In other words, the high-frequency high-speed connector 100 of the present invention can greatly reduce the problem of crosstalk through the above-mentioned connection terminal and metal bottom shell design, so that the connector can be used for high-frequency and high-speed signal transmission.

[0081] It is worth mentioning that by designing each connection terminal without a divergent structure, the differential characteristic resistance of the high-frequency high-speed connector 100 can be effectively controlled to 85ohm or 100ohm, so that the high-frequency high-speed connector 100 can transmit signals more efficiently and reduce signal mismatch noise.

[0082] In addition, generally speaking, in the field of connectors, the smaller the dB value of the return loss of the connector in a specific frequency range, the better the transmission effect of the connector. Fig.15 , which shows the dB value change of the return loss (Return Loss) of the high-speed high-frequency connector of the present invention in the frequency range of 0 to 20 GHz. It can be clearly seen from the figure that the dB value of the return loss (S1,1) of the high-speed high-frequency connector of the present invention in the frequency range of 0 to 20 GHz is less than -15 dB. Fig.15 As shown in the experimental line segments marked in , if the connection terminals in the connector have a divergent structure and the connection terminals as a whole are in a Y-shape, the dB value of the reflection loss (S1,1) of the connector in the frequency range of 0 to 20 GHz cannot be less than -15 dB. This shows that if the connection terminals in the connector have a divergent structure, the reflection loss of the connector in the frequency range of 0 to 20 GHz will be relatively large.

[0083] In addition, the high-frequency and high-speed connector 100 of the present invention has good EMI protection and EMS protection effects through the design of the metal cover 1 and the metal bottom shell 3, the grounding spring arm 312 of the metal bottom shell 3 can be connected to the grounding terminal pin of the flexible flat cable 200, and the metal bottom shell can be connected to the relevant grounding circuit of the circuit board through the welding structure.

[0084] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, all equivalent technical changes made using the description and drawings of the present invention are included in the protection scope of the present invention.

Claims

1. A high-frequency and high-speed connector, characterized in that: The high-frequency high-speed connector is used to be fixed on a circuit board, and the high-frequency high-speed connector is used to hold a flexible flat cable so that the flexible flat cable is electrically connected to the circuit board. The high-frequency high-speed connector includes: A base, comprising an insulating body and a plurality of connecting terminals, a portion of the plurality of connecting terminals being fixed to the insulating body, two ends of each of the connecting terminals being a fixed end and a contact end, and each of the connecting terminals having no branching structure from the fixed end to the contact end; a metal bottom shell, one side of which is fixed to the insulating body, and the other side of which is provided with a plurality of grounding spring arms; any part of the metal bottom shell is not located in an orthographic projection area of ​​the orthographic projection of each of the connecting terminals in the direction of the insulating body; A metal cover body, rotatably connected to the metal bottom shell; When the metal cover and the metal bottom shell jointly hold the flexible flat cable, the plurality of grounding spring arms will contact the plurality of grounding pins of the flexible flat cable, and the other pins of the flexible flat cable will contact the plurality of connecting terminals.

2. The high-frequency and high-speed connector according to claim 1, characterized in that: The high-frequency high-speed connector has a near-end crosstalk dB value less than -40 dB in the frequency range of 0 to 20 GHz.

3. The high-frequency and high-speed connector according to claim 1, characterized in that: The high-frequency high-speed connector has a far-end crosstalk dB value less than -40 dB in the frequency range of 0 to 20 GHz.

4. The high-frequency and high-speed connector according to claim 1, characterized in that: The high-frequency high-speed connector has a reflection loss dB value less than -15 dB in the frequency range of 0 to 20 GHz.

5. The high-frequency and high-speed connector according to claim 1, characterized in that: The left and right sides of the metal bottom shell respectively have at least one first fixing structure, an upper auxiliary fixing structure and a lower auxiliary fixing structure; the insulating body includes at least two second fixing structures; the vertical distance between the upper auxiliary fixing structure and the lower auxiliary fixing structure located on the same side is not greater than the height of the insulating body, wherein, when the metal bottom shell and the insulating body are fixed to each other, each of the first fixing structures and each of the second fixing structures are fixed to each other, and the upper auxiliary fixing structure and the lower auxiliary fixing structure located on the same side jointly clamp the insulating body.

6. The high-frequency and high-speed connector according to claim 5, characterized in that: The metal bottom shell is formed by bending a metal sheet, and the metal bottom shell includes a bottom plate, two side structures and a top plate, the two ends of the bottom plate are respectively connected to the lower position of one end of the two side structures, and the two ends of the top plate are respectively connected to the upper position of the other end of the two side structures; the bottom plate has a plurality of grounding elastic arms; each of the side structures includes the first fixing structure and the lower auxiliary fixing structure; the top plate includes two upper auxiliary fixing structures and a plurality of first reinforcing fixing structures, the plurality of first reinforcing fixing structures are arranged at intervals from each other, and the plurality of first reinforcing fixing structures are used to be fixed to each other with the plurality of second reinforcing fixing structures of the insulating body; wherein, when the metal bottom shell and the base are fixed to each other, the top plate is located above the plurality of connecting terminals, the two side structures are respectively located on both sides of the insulating body, and the bottom plate is not located below the plurality of connecting terminals.

7. The high-frequency and high-speed connector according to claim 6, characterized in that: Each of the side structures also includes a guide structure, two of the guide structures are arranged facing each other, and the two guide structures are used to guide the flexible flat cable into between the metal cover and the metal bottom shell; the two ends of the bottom plate also have multiple welding structures, and the multiple welding structures are used to weld and fix the metal bottom shell to the circuit board.

8. The high-frequency and high-speed connector according to claim 7, characterized in that: Each of the guiding structures further includes a limiting structure, and the two limiting structures are used to jointly limit the rotation range of the metal cover relative to the metal base.

9. The high-frequency and high-speed connector according to claim 6, characterized in that: Each of the side structures also includes a pivoting portion and a locking portion, two of the pivoting portions are arranged adjacent to the bottom plate, and two of the locking portions are arranged adjacent to the top plate; the two pivoting portions are used to be pivotally connected to the two pivoting portions of the metal cover body so that the metal cover body can rotate relative to the metal bottom shell; the two locking portions are used to be fixed to the two locking portions of the metal cover body so as to jointly limit the range of movement of the metal cover body and the metal bottom shell.

10. The high-frequency and high-speed connector according to claim 4, characterized in that: The insulating body comprises a base, a stopper, two side limiting structures and a middle limiting structure, the base comprises a plurality of terminal grooves, each of the terminal grooves accommodates a connecting terminal, the two side limiting structures are respectively located on both sides of the insulating body, the stopper is connected to one side of the base, and the two side limiting structures and the middle limiting structure are located above the base, a side containing groove is formed between each of the side limiting structures and the base, the two ends of the middle limiting structure are connected to the two side limiting structures, and the middle limiting structure, the stopper and the base jointly form a front end limiting groove; when the flexible flat cable is inserted into the high-frequency and high-speed connector, the flexible flat cable is correspondingly located in the two side containing grooves and the front end limiting groove, and the two side limiting structures and the middle limiting structure correspondingly abut against the flexible flat cable, so that the multiple pins of the flexible flat cable are connected to the multiple connecting terminals.

11. The high-frequency and high-speed connector according to claim 1, characterized in that: The metal cover comprises a sheet-like body and at least two elastic structures, one end of each of the elastic structures is connected to the sheet-like body, and the other opposite end of each of the elastic structures has a guide portion; wherein, when the metal cover is located in a closed position, there is an insertion gap between the metal cover and the base, and the two guide portions are correspondingly located in the insertion gap; when the metal cover is located in the closed position and the flexible flat cable is inserted into the metal cover and the base, the two elastic structures will be elastically deformed in a direction away from the sheet-like body due to the two guide portions being pushed by the flexible flat cable.

12. The high-frequency and high-speed connector according to claim 11, characterized in that: Each of the elastic structures includes an L-shaped elastic arm and the guide portion, each of the L-shaped elastic arms includes a longitudinal section extending along a longitudinal direction and a transverse section extending along a transverse direction, one end of the longitudinal section is connected to the sheet-like body, the longitudinal direction is roughly parallel to an insertion direction of the flexible flat cable into the high-frequency and high-speed connector, the longitudinal direction is roughly perpendicular to the transverse direction, one end of the transverse section is connected to the other end of the longitudinal section, and the other end of the transverse section extends downward to form the guide portion.

13. The high-frequency and high-speed connector according to claim 11, characterized in that: The metal cover is formed by bending a metal sheet, and the metal cover includes an upper sheet and a lower sheet, the lower sheet is formed by bending the upper sheet to one side, and the upper sheet is connected to one end of each of the elastic structures; the metal cover also includes a plurality of resisting elastic arms, one end of each of the resisting elastic arms is connected to the lower sheet, and the other end of each of the resisting elastic arms is a free end; the two guide parts are respectively located on both sides of the lower sheet, and each of the guide parts protrudes further from a lower side surface of the lower sheet than each of the resisting elastic arms; wherein each of the resisting elastic arms is used to resist the flexible flat cable located between the metal cover and the base.

14. The high-frequency and high-speed connector according to claim 1, characterized in that: The two sides of the metal cover body are respectively provided with a pivotal portion and a clamping portion. The two pivotal portions of the metal cover body are used to be interconnected with the two pivotal portions of the metal bottom shell, so that the metal cover body can rotate relative to the metal bottom shell; the two clamping portions of the metal cover body are used to be clamped with the two clamping portions of the metal bottom shell to limit the range of movement of the metal cover body and the metal bottom shell.

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