A PCB adapter plate and a gnd-free high-speed cable connector

Abstract

The application relates to the technical field of connectors, in particular to a PCB adapter plate and a groundless high-speed cable connector. The groundless high-speed cable connector comprises a PCB adapter plate and two or more rows of groundless cables electrically and fixedly connected to the PCB adapter plate. The front and back surfaces of the PCB adapter plate are respectively provided with two or more rows of connecting pads arranged in a row in the longitudinal direction and arranged side by side in the transverse direction. Each row of connecting pads comprises a row of signal pads and ground pads. The core wires of the groundless cables are electrically and fixedly connected to the signal pads on the front surface, the conductive outer sheath is electrically connected to the ground pads on the front surface, and the signal pads and the ground pads on the back surface are used for abutting and electrically connecting corresponding terminals of an external connector. The PCB adapter plate is internally provided with conductive circuits to correspondingly connect the connecting pads on the front and back surfaces of the PCB adapter plate. The groundless high-speed cable connector can realize multi-row high-density wiring and greatly improve the performance of the connector.

Description

Technical Field

[0001] This invention relates to the field of connector technology, and in particular to a PCB adapter board and a high-speed cable connector without ground wire. Background Technology

[0002] High-speed cable connectors are divided into grounded cable connectors and non-grounded cable connectors, and are usually single-row cables. Grounded cable connectors usually have the following shortcomings in application and assembly: (1) ground wires need to be soldered during soldering, resulting in low soldering efficiency; (2) to save space, the ground wires of two adjacent cables usually need to be soldered to one pad, increasing the difficulty of the soldering process and reducing performance stability; (3) under the same wire gauge, grounded cables are larger in size and occupy more space than non-grounded cables. Therefore, non-grounded cable connections are gradually becoming a trend.

[0003] Existing groundless cable connectors are typically single-sided single-row cables or double-sided single-row cables. For example, the groundless cable connector disclosed in Chinese invention patent application CN110165444A includes a circuit board with cable pads and ground pads. The groundless cable is located on both sides of the circuit board and electrically connected to the cable pads. The metal shielding layer of the groundless cable is electrically connected to the ground pads. The groundless cable is electrically fixed to the tail of the circuit board. The head of the circuit board is connected to other socket-like components in the form of gold fingers to form a link.

[0004] The problem with existing groundless cable connectors is that, due to space constraints, the number of gold fingers can be limited because they are usually arranged in the same row. This limits the number of cables that can be connected, typically resulting in a single row of cables on one side or one row of cables on each side, thus restricting performance improvements. Increasing the number of cables requires increasing the width of the circuit board to increase space, but this is not conducive to the miniaturization of the connector. Summary of the Invention

[0005] The purpose of this invention is to provide a PCB adapter board to solve the problem of low connector performance caused by the limited number of gold fingers when the head of the existing circuit board is connected to other socket components in the form of gold fingers; the purpose of this invention is also to provide a groundless high-speed cable connector to solve the problem of limited cable arrangement and low connector performance in existing groundless cable connectors.

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

[0007] A PCB adapter board includes a board body. The front and back sides of the board body are respectively provided with two or more rows of wiring pads arranged in a vertical row and in a horizontal row. Each row of wiring pads includes a row of signal pads and ground pads. The signal pads on the front side are used to electrically fix the core wire of the cable without ground, and the ground pads on the front side are used to electrically connect to the conductive outer sheath of the cable without ground. The signal pads and ground pads on the back side are used to be attached and electrically connected to the corresponding terminals of the external connector. The board body is provided with conductive lines to connect the pads on the front and back sides.

[0008] Beneficial Effects: This invention presents a novel PCB adapter board. It features two or more rows of longitudinally arranged and laterally parallel wiring pads on both the front and back sides of the board. The front wiring pads are used for electrical connection of cables, while the back wiring pads are used for contact and electrical connection with corresponding terminals of external connectors. Compared to existing technologies that use a row of gold fingers on the front of the PCB adapter board for insertion into external connectors, this invention connects the entire back of the board to the external connector. This allows for more rows of wiring pads on the back of the board to connect to corresponding terminals of the external connector, significantly increasing the number of wiring pads for electrical connection. Simultaneously, multiple rows of wiring pads on the front of the board connect to more rows of cables, and internal wiring connects the pads on both sides, achieving high-density wiring and significantly improving connector performance.

[0009] Furthermore, each row of wiring pads on the front side contains rows of signal pads and rows of ground pads arranged side by side in the horizontal direction.

[0010] Beneficial effects: When connecting groundless cables, a small section of the core wire can be stripped from the front end of the cable along the cable's extension direction and electrically fixed to the signal pad. A small section of the conductive outer sheath can be stripped from the back of the exposed core wire and electrically contacted to the ground pad. This makes it easier to connect the core wire, the conductive outer sheath, and the corresponding pads. Moreover, this reduces the space occupied by each row of wiring pads, allowing for more rows of wiring pads to be arranged on the PCB adapter board to connect more rows of cables.

[0011] Furthermore, the ground pads of each row of wiring pads on the front are comb-shaped, and rows of signal pads are interspersed among the comb teeth of the ground pads.

[0012] Beneficial effect: This allows the ground pad to form a semi-enclosed structure with the signal pad. The three sides of the signal pad are shielded by the comb teeth on both sides and the comb handle on one side, which can achieve a good shielding effect for the signal pad.

[0013] Furthermore, the ground pads of the two adjacent rows of wiring pads on the front are electrically connected.

[0014] Beneficial effects: During signal transmission, especially when transmitting differential signals, the requirements for signal shielding are very high. This setting ensures that the area around each signal pad is at ground potential, which can further improve the shielding effect.

[0015] Furthermore, the signal pads and ground pads of each row of wiring pads on the back are arranged alternately in the longitudinal direction.

[0016] Beneficial effect: This allows the signal pad located in the middle to be shielded by two adjacent ground pads.

[0017] Furthermore, the board is provided with a shielding structure for shielding the front ends of each cable, and the shielding structure is electrically connected to the ground pad on the front side.

[0018] Beneficial effects: By setting up a shielding structure to shield the front ends of each cable, electromagnetic interference that may be generated during current transmission can be avoided as much as possible, thereby ensuring the overall electrical performance of the connector.

[0019] Furthermore, the shielding structure includes horizontal shielding strips and vertical shielding strips. Multiple horizontal shielding strips are arranged at intervals to separate adjacent cables in the same row. Multiple vertical shielding strips are arranged at intervals to separate cables in two adjacent rows. The horizontal shielding strips are electrically fixed to the ground pad on the front of the board. Two adjacent horizontal shielding strips are used to clamp the conductive outer sheath of the cable without ground wire in between. The vertical shielding strips are electrically fixed to the upper part of the horizontal shielding strips to press the conductive outer sheath downward.

[0020] Beneficial effect: This allows for the pre-positioning of the longitudinal shielding strip by first engaging the positioning teeth on the transverse shielding strip with the positioning holes on the longitudinal shielding strip, and then electrically connecting the longitudinal and transverse shielding strips, making it more convenient to install the longitudinal shielding strip onto the transverse shielding strip.

[0021] Furthermore, the upper part of the horizontal shielding strip is provided with positioning teeth, and the vertical shielding strip is provided with corresponding shielding strip positioning holes. The positioning teeth are inserted into the shielding strip positioning holes and electrically fixed to the shielding strip positioning holes.

[0022] Beneficial effect: This allows for the pre-positioning of the longitudinal shielding strip by first engaging the positioning teeth on the transverse shielding strip with the positioning holes on the longitudinal shielding strip, and then electrically connecting the longitudinal and transverse shielding strips, making it more convenient to install the longitudinal shielding strip onto the transverse shielding strip.

[0023] Furthermore, the bottom of the horizontal shielding strip is provided with several pins at intervals, and the board body is provided with several pin through holes accordingly, with each pin being inserted into a corresponding pin through hole.

[0024] Beneficial effects: By setting pins at the bottom of the horizontal shielding strip and correspondingly setting several through holes on the PCB adapter board, the pins can be inserted into the through holes to pre-position the horizontal shielding strip on the PCB adapter board. Then, the horizontal shielding strip and the PCB adapter board are electrically fixed, making it more convenient to fix the horizontal shielding strip onto the PCB adapter board.

[0025] The groundless high-speed cable connector of this invention adopts the following technical solution:

[0026] A groundless high-speed cable connector includes a PCB adapter board and two or more rows of groundless cables electrically fixed to the PCB adapter board. The PCB adapter board has two or more rows of wiring pads arranged in a row in the longitudinal direction and in parallel in the transverse direction on both its front and back sides. Each row of wiring pads includes a row of signal pads and ground pads. The core wire of the groundless cable is electrically fixed to the signal pad on the front side, and the conductive outer sheath is electrically connected to the ground pad on the front side. The signal pads and ground pads on the back side are used to be electrically connected to the corresponding terminals of an external connector. Conductive lines are arranged inside the PCB adapter board to connect the corresponding pads on both sides of the PCB adapter board.

[0027] Beneficial Effects: This invention presents a novel groundless high-speed cable connector. It features two or more rows of solder pads arranged longitudinally and laterally on both sides of a PCB adapter board. The front solder pads are used for electrical bonding of the cable, while the back solder pads are used for contact bonding with corresponding terminals of an external connector. Compared to existing technologies that use a row of gold fingers on the front of the PCB adapter board for insertion into the external connector, this invention uses the entire back of the PCB adapter board for contact bonding with the external connector. This allows for more rows of solder pads on the back of the PCB adapter board, significantly increasing the number of solder pads for electrical bonding with external connectors. Simultaneously, multiple rows of solder pads on the front of the PCB adapter board connect to more cable rows, and internal wiring within the PCB adapter board connects the solder pads on both sides, achieving multi-row high-density wiring and significantly improving connector performance.

[0028] Furthermore, each row of wiring pads on the front of the PCB adapter board contains rows of signal pads and rows of ground pads arranged side by side in the horizontal direction.

[0029] Beneficial effects: When connecting groundless cables, a small section of the core wire can be stripped from the front end of the cable along the cable's extension direction and electrically fixed to the signal pad. A small section of the conductive outer sheath can be stripped from the back of the exposed core wire and electrically contacted to the ground pad. This makes it easier to connect the core wire, the conductive outer sheath, and the corresponding pads. Moreover, this reduces the space occupied by each row of wiring pads, allowing for more rows of wiring pads to be arranged on the PCB adapter board to connect more rows of cables.

[0030] Furthermore, the ground pads of each row of wiring pads on the front of the PCB adapter board are comb-shaped, and rows of signal pads are interspersed between the comb teeth of the ground pads.

[0031] Beneficial effect: This allows the ground pad to form a semi-enclosed structure with the signal pad. The three sides of the signal pad are shielded by the comb teeth on both sides and the comb handle on one side, which can achieve a good shielding effect for the signal pad.

[0032] Furthermore, the ground pads of two adjacent rows of wiring pads on the front of the PCB adapter board are electrically connected.

[0033] Beneficial effects: During signal transmission, especially when transmitting differential signals, the requirements for signal shielding are very high. This setting ensures that the area around each signal pad is at ground potential, which can further improve the shielding effect.

[0034] Furthermore, the signal pads and ground pads of each row of wiring pads on the back of the PCB adapter board are arranged alternately in the longitudinal direction.

[0035] Beneficial effect: This allows the signal pad located in the middle to be shielded by two adjacent ground pads.

[0036] Furthermore, the PCB adapter board is provided with a shielding structure for shielding the front ends of each cable, and the shielding structure is electrically connected to the ground pad on the front side of the PCB adapter board.

[0037] Beneficial effects: By setting up a shielding structure to shield the front ends of each cable, electromagnetic interference that may be generated during current transmission can be avoided as much as possible, thereby ensuring the overall electrical performance of the connector.

[0038] Furthermore, the shielding structure includes horizontal shielding strips and vertical shielding strips. Multiple horizontal shielding strips are arranged at intervals to separate adjacent cables in the same row. Multiple vertical shielding strips are arranged at intervals to separate cables in two adjacent rows. The horizontal shielding strips are electrically fixed to the ground pad on the front of the PCB adapter board. Two adjacent horizontal shielding strips clamp the conductive outer casing of the cable without ground wire in between. The vertical shielding strips are electrically fixed to the upper part of the horizontal shielding strips and press the conductive outer casing downwards.

[0039] Beneficial effects: This setup can fully ensure the reliable contact between the conductive outer sheath of the groundless cable and the ground pad on the front of the PCB adapter board. Moreover, it ensures that the conductive outer sheath of each groundless cable is surrounded by the ground pad, the horizontal shielding strips on both sides, and the vertical shielding strip on the top, further improving the shielding effect.

[0040] Furthermore, the upper part of the horizontal shielding strip is provided with positioning teeth, and the vertical shielding strip is provided with corresponding shielding strip positioning holes. The positioning teeth are inserted into the shielding strip positioning holes and electrically fixed to the shielding strip positioning holes.

[0041] Beneficial effect: This allows for the pre-positioning of the longitudinal shielding strip by first engaging the positioning teeth on the transverse shielding strip with the positioning holes on the longitudinal shielding strip, and then electrically connecting the longitudinal and transverse shielding strips, making it more convenient to install the longitudinal shielding strip onto the transverse shielding strip.

[0042] Furthermore, the bottom of the horizontal shielding strip is provided with several pins at intervals, and the PCB adapter board is provided with several through holes accordingly, with each pin being inserted into a corresponding through hole.

[0043] Beneficial effects: By setting pins at the bottom of the horizontal shielding strip and correspondingly setting several through holes on the PCB adapter board, the pins can be inserted into the through holes to pre-position the horizontal shielding strip on the PCB adapter board. Then, the horizontal shielding strip and the PCB adapter board are electrically fixed, making it more convenient to fix the horizontal shielding strip onto the PCB adapter board.

[0044] Furthermore, the groundless high-speed cable connector also includes a housing, which is a semi-enclosed structure. The inner wall of the housing has a stepped surface facing the opening of the housing. The front of the PCB adapter board is attached to the stepped surface. The housing has a cable passage, through which the groundless cable extends out of the housing.

[0045] Beneficial effects: By setting a step inside the housing to position the PCB adapter board in the housing, the PCB adapter board is pressed firmly against the step surface during installation, which can prevent the PCB adapter board from shaking inside the housing, thereby ensuring reliable contact between the PCB adapter board and the external connector.

[0046] Furthermore, the step surface is provided with positioning posts extending perpendicularly to the step surface, and the PCB adapter board is provided with corresponding positioning holes, in which the positioning posts are inserted.

[0047] Beneficial effects: The positioning pins and positioning holes work together to further position the PCB adapter board, preventing the PCB adapter board from shifting and thus ensuring the reliability of electrical contact between the corresponding terminals of the PCB adapter board and the external connector.

[0048] Furthermore, the front end of the PCB adapter board is provided with a limiting tongue, and the housing is provided with a corresponding slot. A rib is provided at the opening of the slot. The limiting tongue is fitted into the slot, and the rib is stopped on the back of the limiting tongue.

[0049] Beneficial effects: By setting slots and ribs on the housing, which cooperate with the limiting tongue at the front end of the PCB adapter board, the PCB adapter board can be further limited, preventing the front end of the PCB adapter board from detaching from the housing. Attached Figure Description

[0050] Figure 1 This is a schematic diagram showing the electrical connection state between Embodiment 1 of the groundless high-speed cable connector of the present invention and an external connector;

[0051] Figure 2 for Figure 1 Exploded view;

[0052] Figure 3 This is a schematic diagram of the shell from a first-person perspective;

[0053] Figure 4 This is a schematic diagram of the shell from a second perspective;

[0054] Figure 5 This is a front view of the PCB adapter board;

[0055] Figure 6 This is a schematic diagram of the back of the PCB adapter board;

[0056] Figure 7 A schematic diagram showing a shielding structure on a PCB adapter board;

[0057] Figure 8 This is a partial schematic diagram of the shielding structure;

[0058] Figure 9 This is a top view of the shielding structure;

[0059] In the diagram: 1. Long fastening bolt; 2. Housing; 20. Slot; 21. Rib; 22. Stepped surface; 23. Positioning post; 24. Edge retainer; 25. Slot; 26. Long bolt mounting hole; 27. Short bolt mounting hole; 3. Wire fixing frame; 4. Short fastening bolt; 5. Adhesive tape; 6. Groundless cable; 7. PCB adapter board; 70. Long bolt through hole; 71. Pin through hole; 72. U-shaped ground pad; 73. First positioning post. 74. First signal pad; 75. First ground pad; 76. Second ground pad; 77. Second signal pad; 78. Limiting tongue; 79. Second positioning hole; 8. External connector; 9. PCB motherboard; 10. Insulating film; 11. Load backplate; 12. Longitudinal shielding strip; 120. Shielding strip positioning hole; 13. Horizontal shielding strip; 130. Pin; 131. Side protrusion; 132. Positioning tooth. Detailed Implementation

[0060] The groundless high-speed cable connector of the present invention sets multiple rows of wiring pads on both sides of the PCB adapter board. The wiring pads on the front side are used for electrical fixing of the cable, and the wiring pads on the back side are used for contact and electrical connection with the corresponding terminals of the external connector. The pads on both sides of the PCB adapter board are connected by internal wiring, thereby arranging multiple rows of cables on the PCB adapter board to achieve high-density wiring.

[0061] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0062] Embodiment 1 of the groundless high-speed cable connector of the present invention:

[0063] like Figure 1 , Figure 2 As shown, the groundless high-speed cable connector includes a housing 2, inside which is a PCB adapter board 7. Multiple rows of groundless cables 6 are electrically fixed to the PCB adapter board 7. The housing 2 has a cable passage, through which the groundless cables 6 extend outside the housing 2 and are secured by a cable fixing frame 3 to prevent the groundless cables 6 from shaking. The portion of the groundless cables 6 extending outside the housing 2 is wrapped with adhesive tape 5 to further prevent cable shaking.

[0064] In this embodiment, the groundless cable is a differential signal line for transmitting differential signals, comprising two parallel core wires and, from the inside out, an insulating layer, a conductive outer sheath, and an insulating outer sheath sequentially covering the outside of the two core wires. For example... Figure 5 , Figure 6As shown, the PCB adapter board 7 is a rectangular board. Both the front and back sides of the PCB adapter board 7 have multiple rows of wiring pads arranged vertically and horizontally. Each row of wiring pads includes a row of signal pads and a row of ground pads. The signal pads on the front of the PCB adapter board 7 are defined as the first signal pad 74, and the ground pads as the first ground pads 75. The signal pads on the back of the PCB adapter board 7 are defined as the second signal pads 77, and the ground pads as the second ground pads 76. The core wire of the groundless cable 6 is electrically fixed to the first signal pad 74, and its conductive outer sheath is electrically connected to the first ground pad 75. The front side of the PCB adapter board 7 also has a U-shaped ground pad 72, which partially surrounds all the first signal pads 74 and the first ground pads 75. On the front side of the PCB adapter board 7, each row of wiring pads contains rows of first signal pads 74 and first ground pads 75 arranged side-by-side in the horizontal direction. The first ground pads 75 are comb-shaped, and the first signal pads 74 are interspersed between the comb teeth of the first ground pads 75, forming a semi-enclosed structure for the first signal pads 74, thus providing a good shielding effect. The first ground pads 75 of adjacent rows of wiring pads are electrically connected to further improve the shielding effect. On the back side of the PCB adapter board 7, each row of wiring pads has second signal pads 77 and second ground pads 76 arranged alternately in the vertical direction. The pads on the back side of the PCB adapter board 7 are used for contact and electrical connection with the corresponding terminals of the external connector 8. Conductive lines are arranged inside the PCB adapter board 7 to connect the pads on both sides of the PCB adapter board 7.

[0065] like Figure 3 , Figure 4 As shown, the housing 2 is a semi-enclosed structure, including a bottom plate, a front side plate, a left side plate, and a right side plate. The rear of the housing 2 has a cable passage for cables to pass through. The inner wall of the housing 2 has a stepped surface 22 facing the opening of the housing. This stepped surface 22 is used to fit against the U-shaped ground pad 72 on the front of the PCB adapter board 7 to limit the positioning of the PCB adapter board 7. The side plate portion of the housing 2 surrounding the stepped surface 22 forms a retaining edge 24, which is used to stop at the edge of the PCB adapter board 7. A positioning post 23 extending perpendicularly to the stepped surface 22 is provided on the stepped surface 22. The positioning post 23 is used to cooperate with the first positioning hole 73 on the PCB adapter board 7 to position the PCB adapter board 7. A slot 25 is provided on the front side plate of the housing 2. A rib 21 is provided at the opening of the slot 25. The slot 25 and the rib 21 are used to cooperate with the limiting tongue 78 at the front end of the PCB adapter board 7 to further limit the positioning of the PCB adapter board 7. After the PCB adapter board 7 is installed inside the housing 2, the limiting tongue 78 at the front end of the PCB adapter board 7 is engaged in the slot 25 on the front side plate of the housing 2, and the plate rib 21 is stopped on the back of the limiting tongue 78, thereby limiting the PCB adapter board 7 and preventing the PCB adapter board 7 from moving away from the step surface 22 and disengaging from the step surface 22.

[0066] The housing 2 is made entirely of metal. The PCB adapter board 7 is installed inside the housing 2. The U-shaped ground pad 72 on the front of the PCB adapter board 7 fits against the stepped surface 22 on the inner wall of the housing 2, so that the housing 2 and the PCB adapter board 7 together form a shield to shield the front end of the multiple rows of groundless cables 6.

[0067] The housing 2 has four long bolt mounting holes 26, two of which are located at the front end and the other two are located in the rear middle section of the housing 2 and are arranged opposite each other. A recess 20 is provided on the housing 2 corresponding to the long bolt mounting holes 26, allowing the long bolt 1 to pass through the long bolt mounting hole and have its bolt head recessed into the recess 20. The rear end of the housing 2 also has two short bolt mounting holes 27, with a recess 20 corresponding to the short bolt mounting holes 27, allowing the short bolt 4 to pass through the short bolt mounting holes 27 and have its head recessed into the recess 20. The rear end of the housing 2 has a notch for mounting a wire frame 3.

[0068] Fixed frame 3 is a U-shaped frame, such as Figure 2 As shown, threaded holes are provided on both sides of the U-shaped frame. The U-shaped frame is fastened to the notch at the tail of the housing 2 and fixedly connected to the housing 2 by short fastening bolts 4 to securely restrain the groundless cable 6 inside. After the short fastening bolts 4 pass through the short bolt mounting holes on the housing 2, they are screwed into the threaded holes on the U-shaped frame, and the bolt heads are recessed into the groove 20.

[0069] like Figure 7-9 As shown, the PCB adapter board 7 also has a shielding structure for shielding the front end of the groundless cable 6. The shielding structure is electrically connected to the first ground pad 75 on the front side of the PCB adapter board 7. The shielding structure includes horizontal shielding strips 13 and vertical shielding strips 12. Multiple horizontal shielding strips 13 are arranged at intervals to separate adjacent cables in the same row. Multiple vertical shielding strips 12 are arranged at intervals to separate cables in two adjacent rows. The horizontal shielding strips 13 are electrically fixed to the first ground pad 75 on the front side of the PCB adapter board 7. Several side protrusions 131 are provided at intervals on both sides of the horizontal shielding strips 13. The side protrusions 131 on two adjacent horizontal shielding strips 13 are aligned to clamp the conductive outer part of the groundless cable 6 located between the two adjacent horizontal shielding strips 13. Several pins 130 are provided at intervals on the bottom of the horizontal shielding strips 13. Several pin through holes 71 are provided on the PCB adapter board 7 accordingly. The pins 130 are inserted into the pin through holes 71 one by one to pre-position the horizontal shielding strips 13.

[0070] The vertical shielding strip 12 is electrically fixed to the upper part of the horizontal shielding strip 13, pressing the conductive outer sheath of the groundless cable 6 downwards. This ensures reliable contact between the conductive outer sheath and the first ground pad 75 on the front of the PCB adapter board. Furthermore, each groundless cable's conductive outer sheath is simultaneously surrounded by the first ground pad 75, the horizontal shielding strips 13 on both sides, and the vertical shielding strip 12 on the upper side, further improving the shielding effect. The upper part of the horizontal shielding strip 13 has positioning teeth 132, and the vertical shielding strip 12 has corresponding positioning holes 120. The positioning teeth 132 engage with the positioning holes 120 and are electrically fixed to them. The positioning teeth 132 and the positioning holes 120 cooperate to pre-position the vertical shielding strip 12. The first ground pad 75 on the front of the PCB adapter board 7 is comb-shaped. The horizontal shielding strip 13 corresponds to the comb teeth of the first ground pad 75, and the vertical shielding strip 12 corresponds to the comb handle of the first ground pad 75.

[0071] like Figure 5 As shown, the PCB adapter board 7 is also provided with a long bolt through hole 70 for mounting a long fastening bolt 1 and a second positioning hole 79 for positioning and engaging with the positioning post on the external connector 8. The long fastening bolt 1 can be used to lock the groundless high-speed cable connector to the external connector 8 and other mechanisms, so that the pads on the back of the PCB adapter board 7 and the terminals of the external connector 8 form a reliable contact, thereby forming a link.

[0072] The groundless high-speed cable connector of this invention can be used as follows: Figure 1 , Figure 2 As shown, after the groundless cable 6 is electrically fixed to the PCB adapter board 7, the PCB adapter board 7 is installed into the housing 2. The limiting tongue 78 at the front end of the PCB adapter board 7 is snapped into the slot 25 on the front side plate of the housing 2. The plate rib 21 stops on the back of the limiting tongue 78, thereby limiting the front end of the PCB adapter board 7. At the same time, the cable fixing frame 3 is fixed to the rear of the housing 2 by short fastening bolts 4, and the cable is fixed and locked from the rear. In this way, the PCB adapter board 7 and the housing 2 are assembled into one unit. Then, the housing 2, PCB adapter board 7, external connector 8, PCB motherboard 9, insulating film 10, and load back plate 11 are stacked and locked by long fastening bolts 1, so that the PCB adapter board 7 and the PCB motherboard 9 lock the external connector 8 in the middle, so that the upper and lower terminals of the external connector 8 are always kept in an elastically compressed state, forming a reliable electrical connection.

[0073] This invention relates to a groundless high-speed cable connector. Multiple rows of wiring pads are arranged on both the front and back sides of a PCB adapter board. The front wiring pads are used for electrically fixing the groundless cable, while the back wiring pads are used for contacting the corresponding terminals of an external connector. Because the entire back of the PCB adapter board is in contact with the external connector, rather than just using a row of gold fingers on the front, multiple rows of wiring pads can be arranged on the back of the PCB adapter board for contacting the corresponding terminals of the external connector. This significantly increases the number of wiring pads used for electrical connection to the external connector. Simultaneously, multiple rows of wiring pads can be arranged on the front of the PCB adapter board to connect more rows of cables. Through internal wiring within the PCB adapter board, the pads on both sides are connected, thereby achieving high-density wiring and significantly improving connector performance.

[0074] Example 2: The difference from Example 1 is that the signal pads and ground pads in each row of wiring pads on the front of the PCB adapter board are arranged alternately in the longitudinal direction. When connecting cables, the core wire can be stripped out and electrically fixed to the signal pad, and the conductive outer wire can be stripped to one side and electrically connected to the ground pad.

[0075] Example 3: The difference from Example 1 above is that the ground pads of each row of wiring pads on the front of the PCB adapter board are strip-shaped, and the rows of signal pads are distributed on one side of the strip-shaped ground pads.

[0076] Example 4: The difference from Example 1 above is that the rows of ground pads and rows of signal pads included in each row of wiring pads on the back of the PCB adapter board are arranged side by side in the horizontal direction.

[0077] Example 5: The difference from Example 1 above is that the front of the PCB adapter board is only provided with horizontal shielding strips and no vertical shielding strips. There are multiple horizontal shielding strips arranged at intervals to separate adjacent cables in the same row. The horizontal shielding strips are electrically fixed to the ground pad on the front of the PCB adapter board. The conductive parts of the non-grounded cable between two adjacent horizontal shielding strips are clamped together.

[0078] Example 6: The difference from Example 1 above is that no positioning teeth are provided on the horizontal shielding strip, and no shielding strip positioning holes are provided on the vertical shielding strip. The vertical shielding strip is spot-welded to the upper part of the horizontal shielding strip and electrically fixed to the horizontal shielding strip.

[0079] Example 7: The difference from Example 1 above is that no pins are set at the bottom of the horizontal shielding strip. The horizontal shielding strip is spot-welded to the PCB adapter board and electrically fixed to the first ground pad on the front side.

[0080] Example 8: The difference from Example 1 above is that the groundless high-speed cable connector does not have a housing, and the PCB adapter board is directly installed into the equipment box during use.

[0081] Example 9: The difference from Example 1 above is that the groundless cable is a single-core cable.

[0082] The present invention also provides an embodiment of a PCB adapter board, the specific structure of which is the same as the structure of the PCB adapter board in the above embodiments of the groundless high-speed cable connector, and will not be described again here.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A PCB adapter board, characterized in that: The board includes a board body with two or more rows of wiring pads arranged in a row in the longitudinal direction and in parallel in the transverse direction on both the front and back sides. Each row of wiring pads includes a row of signal pads and ground pads. The signal pads on the front side are used to electrically fix the core wire of the groundless cable (6), and the ground pads on the front side are used to electrically connect to the conductive outer sheath of the groundless cable (6). The signal pads and ground pads on the back side are used to be attached and electrically connected to the corresponding terminals of the external connector (8). The board body is provided with conductive lines to connect the pads on both sides.

2. The PCB adapter board according to claim 1, characterized in that: The front side contains rows of signal pads and rows of ground pads arranged side by side in the horizontal direction.

3. The PCB adapter board according to claim 2, characterized in that: On the front, the ground pads of each row of wiring pads are comb-shaped, and rows of signal pads are interspersed among the comb teeth of the ground pads.

4. The PCB adapter board according to claim 3, characterized in that: The ground pads of the two adjacent rows of wiring pads on the front are electrically connected.

5. The PCB adapter board according to any one of claims 2-4, characterized in that: The signal pads and ground pads of each row of wiring pads on the back are arranged alternately in the longitudinal direction.

6. The PCB adapter board according to any one of claims 1-4, characterized in that: The board has a shielding structure for shielding the front ends of each cable, and the shielding structure is electrically connected to the ground pad on the front.

7. The PCB adapter board according to claim 6, characterized in that: The shielding structure includes horizontal shielding strips (13) and vertical shielding strips (12). Multiple horizontal shielding strips (13) are arranged at intervals to separate adjacent cables in the same row. Multiple vertical shielding strips (12) are arranged at intervals to separate cables in two adjacent rows. The horizontal shielding strips (13) are electrically fixed to the ground pad on the front of the board. Two adjacent horizontal shielding strips (13) are used to clamp the conductive outer sheath of the ungrounded cable (6) in the middle. The vertical shielding strips (12) are electrically fixed to the upper part of the horizontal shielding strips (13) to press the conductive outer sheath downward.

8. The PCB adapter board according to claim 7, characterized in that: The upper part of the horizontal shielding strip (13) is provided with positioning teeth (132), and the vertical shielding strip (12) is provided with corresponding shielding strip positioning holes (120). The positioning teeth (132) are inserted into the shielding strip positioning holes (120) and electrically fixed to the shielding strip positioning holes (120).

9. The PCB adapter board according to claim 7, characterized in that: The bottom of the horizontal shielding strip (13) is provided with a number of pins (130) spaced apart, and the board is provided with a number of pin holes (71) corresponding to each other. The pins (130) are inserted into the pin holes (71) one by one.

10. A groundless high-speed cable connector, characterized in that: The PCB adapter board (7) includes two or more rows of groundless cables (6) electrically fixed on the PCB adapter board (7). The front and back sides of the PCB adapter board (7) are provided with two or more rows of wiring pads arranged in a row in the longitudinal direction and in parallel in the transverse direction. Each row of wiring pads includes a row of signal pads and ground pads. The core wire of the groundless cable (6) is electrically fixed on the signal pad on the front side. The conductive outer sheath is electrically connected to the ground pad on the front side. The signal pad and ground pad on the back side are used to be attached and electrically connected to the corresponding terminals of the external connector (8). The PCB adapter board (7) has conductive lines inside to connect the pads on the front and back sides of the PCB adapter board (7).

11. The groundless high-speed cable connector according to claim 10, characterized in that: The signal pads and ground pads in each row of wiring pads on the front of the PCB adapter board (7) are arranged side by side in the horizontal direction.

12. The groundless high-speed cable connector according to claim 11, characterized in that: The ground pads of each row of wiring pads on the front of the PCB adapter board (7) are comb-shaped, and rows of signal pads are interspersed between the comb teeth of the ground pads.

13. The groundless high-speed cable connector according to claim 12, characterized in that: The grounding pads of two adjacent rows of wiring pads on the front of the PCB adapter board (7) are electrically connected.

14. The groundless high-speed cable connector according to any one of claims 11-13, characterized in that: The signal pads and ground pads of each row of wiring pads on the back of the PCB adapter board (7) are arranged alternately in the longitudinal direction.

15. The groundless high-speed cable connector according to any one of claims 10-13, characterized in that: The PCB adapter board (7) is provided with a shielding structure for shielding the front end of each cable. The shielding structure is electrically connected to the ground pad on the front side of the PCB adapter board (7).

16. The groundless high-speed cable connector according to claim 15, characterized in that: The shielding structure includes horizontal shielding strips (13) and vertical shielding strips (12). Multiple horizontal shielding strips (13) are arranged at intervals to separate adjacent cables in the same row. Multiple vertical shielding strips (12) are arranged at intervals to separate cables in two adjacent rows. The horizontal shielding strips (13) are electrically fixed to the ground pad on the front of the PCB adapter board (7). Two adjacent horizontal shielding strips (13) clamp the conductive outer casing of the ungrounded cable (6) in between. The vertical shielding strips (12) are electrically fixed to the upper part of the horizontal shielding strips (13) and press the conductive outer casing downward.

17. The groundless high-speed cable connector according to claim 16, characterized in that: The upper part of the horizontal shielding strip (13) is provided with positioning teeth (132), and the vertical shielding strip (12) is provided with corresponding shielding strip positioning holes (120). The positioning teeth (132) are inserted into the shielding strip positioning holes (120) and electrically fixed to the shielding strip positioning holes (120).

18. The groundless high-speed cable connector according to claim 16, characterized in that: The bottom of the horizontal shielding strip (13) is provided with a number of pins (130) spaced apart, and the PCB adapter board (7) is provided with a number of pin holes (71) respectively. The pins (130) are inserted into the pin holes (71) one by one.

19. The groundless high-speed cable connector according to any one of claims 10-13, characterized in that: The groundless high-speed cable connector also includes a housing (2), which is a semi-enclosed structure. The inner wall of the housing (2) has a stepped surface (22) facing the opening of the housing (2). The front of the PCB adapter board (7) is attached to the stepped surface (22). The housing (2) has a wire passage, through which the groundless cable (6) extends out of the housing (2).

20. The groundless high-speed cable connector according to claim 19, characterized in that: The step surface (22) is provided with a positioning post (23) extending perpendicularly to the step surface (22), and the PCB adapter board (7) is provided with a corresponding positioning hole (120), and the positioning post (23) is inserted into the positioning hole (120).

21. The groundless high-speed cable connector according to claim 19, characterized in that: The front end of the PCB adapter board (7) is provided with a limiting tongue (78), and the housing (2) is provided with a corresponding slot (25). A rib (21) is provided at the opening of the slot (25). The limiting tongue (78) is fitted into the slot (25), and the rib (21) is blocked on the back of the limiting tongue (78).

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