Cable connector assembly

Abstract

A cable connector assembly comprises a butt joint capable of being matched with a butt joint connector, a circuit board with one end electrically connected with the butt joint and a cable electrically connected with the other end opposite to one end of the circuit board, and the butt joint comprises a plurality of conductive terminals. The circuit board comprises a plurality of terminal soldering lugs which are electrically connected with the conductive terminals, a plurality of cable soldering lugs which are welded with the cable, and conductive paths which are connected with the terminal soldering lugs and the corresponding cable soldering lugs, and the cable comprises a plurality of pairs of high-speed wires which are used for transmitting high-speed signals. The cable soldering lugs comprise a plurality of pairs of high-speed cable soldering lugs connected with the high-speed cable, the conductive paths comprise a plurality of pairs of high-speed conductive paths connected with the high-speed cable soldering lugs and the corresponding terminal soldering lugs, and each pair of high-speed cable soldering lugs is connected with the nearest pair of terminal soldering lugs.

Description

[Technical field]

[0001] The invention relates to a cable connector assembly, and in particular to a cable connector assembly comprising a circuit board. [Background technology]

[0002] Please refer to U.S. Patent No. US10777951B2 published on September 15, 2020, which discloses a cable connector assembly, the cable connector assembly comprising a butt joint, a circuit board electrically connected to the butt joint, and a cable electrically connected to the circuit board. The circuit board comprises a cable welding piece disposed on the rear side and welded to the cable, a terminal welding piece disposed on the front side and electrically connected to the butt joint, and a conductive path connecting the cable welding piece and the terminal welding piece. The cable comprises a pair of high-speed signal lines capable of transmitting high-speed signals, and the conductive path connecting the pair of high-speed signal lines and the corresponding terminal welding pieces on the circuit board is long and bent, which is not conducive to the transmission of high-speed signals. [Summary of the invention]

[0003] The main purpose of the present invention is to provide a cable connector assembly, in which the high-speed signal is transmitted over a short distance on a circuit board, thereby facilitating high-speed signal transmission.

[0004] In order to solve the above technical problems, the present invention can adopt the following technical solutions: a cable connector assembly, comprising a docking head that can be matched with a docking connector, a circuit board whose one end is electrically connected to the docking head, and a cable whose other end is electrically connected to the one end of the circuit board opposite to the one end, the docking head comprising a plurality of conductive terminals, the circuit board comprising a plurality of terminal welding pieces electrically connected to the conductive terminals, a plurality of cable welding pieces welded to the cables, and a conductive path connecting the terminal welding pieces with the corresponding cable welding pieces, the cable comprising a plurality of pairs of high-speed lines for transmitting high-speed signals, the cable welding pieces comprising a plurality of pairs of high-speed cable welding pieces connected to the high-speed lines, the conductive path comprising a plurality of pairs of high-speed conductive paths connecting the high-speed cable welding pieces and corresponding terminal welding pieces, and each pair of the high-speed cable welding pieces is connected to a pair of terminal welding pieces closest to it.

[0005] Compared with the prior art, the advantages of the present invention are that the high-speed cable welding piece of the cable connector assembly of the present invention is connected to a pair of terminal welding pieces closest to it, shortening the length of the high-speed conductive path, thereby facilitating the effective transmission of high-speed signals.

Brief Description of the Drawings

[0006] Figure 1 is a three-dimensional diagram of a cable connector assembly according to the present invention.

[0007] Figure 2 yes Figure 1 A partially exploded view of a cable connector assembly is shown.

[0008] Figure 3 yes Figure 2 A further exploded view of the cable connector assembly is shown with the inner mold and the insulating housing removed.

[0009] Figure 4 yes Figure 3 A further exploded view of the cable connector assembly is shown with the metal housing removed.

[0010] Figure 5 yes Figure 4 A further exploded view of another perspective of the cable connector assembly is shown.

[0011] Figure 6 yes Figure 5 A front view of the cable and circuit board of the cable connector assembly is shown.

[0012] Figure 7 yes Figure 6 A top view of the cable and circuit board of the cable connector assembly is shown.

[0013] Figure 8 yes Figure 6 The cable connector assembly is shown in a three-dimensional view before the cable and circuit board are welded.

[0014] Fig. 9 yes Figure 8 A three-dimensional view of the cable and the circuit board of the cable connector assembly from another perspective.

[0015] Fig.10 yes Figure 8 A front view of a first side of a circuit board of a cable connector assembly is shown.

[0016] Fig.11 yes Fig.10 A front view of a second side of a circuit board of a cable connector assembly is shown.

[0017]

Main component symbol description

[0018] Cable connector assembly 100 Ground wire 314

[0019] Connector 10 Conductor 320

[0020] Circuit board 20 Insulation layer 302

[0021] Cable 30 First side 201

[0022] Metal housing 40 Second surface 202

[0023] Inner mold 50 terminal solder lug 21

[0024] Insulation shell 60 Cable welding piece 22

[0025] Insulation body 11 Conductive path 23

[0026] Conductive terminal 12 High-speed cable welding piece 220

[0027] Metal shell 13 Low-speed cable welding piece 221

[0028] High-speed line 31 Power cable welding piece 223

[0029] Low speed line 32 Ground cable welding piece 224

[0030] Power cable 33 Low speed signal cable welding piece 2211

[0031] Ground wire 34 Auxiliary signal cable welding piece 2212

[0032] Low-speed signal line 321 Chip power cable welding piece 2213

[0033] Auxiliary signal line 322 Detection signal cable welding piece 2214

[0034] Chip power supply line 323 High-speed conductive path 230

[0035] Detection signal line 324 Fixing block 70

[0036] Inner conductor 310 First glue portion 71

[0037] Inner insulation layer 311 Second glue portion 72

[0038] Shielding layer 312 Third glue portion 73

[0039] Outer skin 313 Groove 701

[0040] Electronic components 25 Chips 251

[0041] Capacitor 253

[0042] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. [Specific implementation method]

[0043] like Figure 1-11As shown, a cable connector assembly 100 in accordance with the present invention can be matched with a docking connector (not shown). The cable connector assembly 100 includes a docking head 10 that can be matched with a docking connector, a circuit board 20 electrically connected to the docking head 10, a cable 30 electrically connected to the circuit board 20, a metal shell 40 installed on the docking head 10 and the cable 30 and accommodating the circuit board 20, an inner mold 50 covering the front of the metal shell 40 and the cable 30, and an insulating shell 60 arranged on the outside of the metal shell 40. The docking head 10 is connected to the front end of the circuit board 20, and the cable 30 is connected to the rear end of the circuit board 20 opposite to the front end. The cable 30 establishes an electrical connection with the docking head 10 through the circuit board 20. The cable connector assembly 100 includes a total of four high-speed channels, and the transmission speed of each channel can reach 10Gbps or even higher.

[0044] The docking connector 10 includes an insulating body 11, a plurality of conductive terminals 12 received in the insulating body 11, and a metal shell 13 disposed outside the insulating body 11. The conductive terminals 12 are arranged in two rows spaced apart in the vertical direction, and the conductive terminals 12 in each row are spaced apart in the horizontal direction.

[0045] The cable 30 includes a plurality of high-speed lines 31 for transmitting high-speed signals, a low-speed line 32 for transmitting low-speed signals, a power line 33 (VBUS) for transmitting power, and a ground line 34 (GND) for grounding. The low-speed lines include a pair of low-speed signal lines 321 (D+D-) for transmitting USB2.0 signals, two auxiliary signal lines 322 (SUB1, SUB2) for transmitting audio signals etc. as needed, a chip power supply line 323 (VCONN) for powering the chip on the circuit board 20, and a detection signal line 324 (CC) for judging the working status.

[0046] In the present invention, four high-speed lines 31 are provided for transmitting four pairs of high-speed differential signals. Each of the high-speed lines 31 is provided as a double-core line and includes a pair of inner conductors 310, an inner insulating layer 311 covering the pair of inner conductors 310, a common shielding layer 312 covering the inner insulating layer 311, an outer skin 313 covering the shielding layer 312, and a grounding line 314 provided adjacent to the shielding layer 312. The grounding line 314 is bent backward and contacts the metal shell 40. The low-speed line 32, the power line 33, and the grounding line 34 are provided as single-core lines, and each single-core line includes a conductor 320 and an insulating layer 302 covering the outside of the conductor 320.

[0047] The circuit board 20 includes a first surface 201 and a second surface 202 disposed opposite to the first surface 201. The circuit board is provided with a plurality of terminal welding pieces 21 electrically connected to the conductive terminals 12, a plurality of cable welding pieces 22 connected to the cables 30, and a conductive path 23 connecting the terminal welding pieces 21 and the corresponding cable welding pieces 22 on the first surface 201 and the second surface 202. The cable welding pieces 22 include a high-speed cable welding piece 220 connected to the high-speed line 31, a low-speed cable welding piece 221 connected to the low-speed line 32, a power cable welding piece 223 connected to the power line 33, and a grounding cable welding piece 224 connected to the grounding line 34. The low-speed cable welding piece 221 includes a low-speed signal cable welding piece 2211 connected to a pair of the low-speed signal lines 321, an auxiliary signal cable welding piece 2212 connected to the auxiliary signal line 322, a chip power supply cable welding piece 2213 connected to the chip power supply line 323, and a detection signal cable welding piece 2214 connected to the detection signal line 324. The conductive path 23 includes a plurality of pairs of high-speed conductive paths 230 connecting the high-speed cable welding pieces 220 and the corresponding terminal welding pieces 21.

[0048] A pair of inner conductors 310 of the high-speed line 31 is connected to a corresponding pair of high-speed cable welding pieces 220 to form a pair of high-speed channels. On the first surface 201, the power cable welding piece 223 is arranged in the middle area of ​​the lateral direction of the circuit board 20 and is located between the two pairs of high-speed cable welding pieces 220. The low-speed cable welding piece 221 and the grounding cable welding piece 224 are both located on the outer side of the high-speed cable welding piece 220 in the lateral direction. Specifically, the grounding cable welding piece 224 and the chip power supply cable welding piece 2213 are respectively arranged at the two outermost sides in the lateral direction of the circuit board 20, the detection signal cable welding piece 2214 is arranged adjacent to the grounding cable welding piece 224, and the second auxiliary cable welding piece in the auxiliary signal cable welding piece 2212 is arranged adjacent to the chip power supply cable welding piece 2213. Therefore, on the first surface 201, the cable welding pieces 22 are arranged in the lateral direction in sequence as GND, CC, TX1+, TX1-, VBUS, RX2-, RX2+, SBU1, VCONN. On the second surface 202, the low-speed cable welding piece 221 and the grounding cable welding piece 224 are also arranged on the outside of the high-speed cable welding piece 220 in the lateral direction. Specifically, a pair of the low-speed signal cable welding pieces 2211 are arranged on one side of the circuit board 20, and the grounding cable welding piece 224 is arranged on the other side of the circuit board 20. The first auxiliary cable welding piece of the auxiliary signal cable welding piece 2212 is arranged on the inner side of the grounding cable welding piece 224. Therefore, the cable welding pieces 22 on the second surface 202 are arranged in sequence as D+, D-, TX2+, TX2-TX1+, RX2-, RX2+SBU2, GND in the lateral direction. The grounding cable welding pieces 224 on the two surfaces are arranged on the same side. The circuit board 20 is also provided with an electronic component 25. The electronic component 25 is arranged on the second surface 202 between a row of the cable welding pieces 22. The electronic component 25 is provided with a length direction and a width direction. The width direction is arranged along the lateral direction of the circuit board 20, and the length direction is arranged along the front-back direction of the circuit board 20. At least part of the electronic components 25 are arranged on the rear side of the cable welding piece 22. Specifically, in the present invention, the electronic components 25 include a chip 251 and a capacitor 253. The chip 251 and the cable welding piece 22 are arranged in a row, and the capacitor 253 is arranged on the rear side of the chip 251. The electronic components 25 are separated by two pairs of high-speed channels.

[0049] The cable connector assembly 100 further includes a fixing block 70 integrally formed with the docking head 10, the circuit board 20 and the cable 30 and fixing the three together. The fixing block 70 is provided with a groove 701 for giving way to the capacitor 253. The cable connector assembly 100 of the present invention is provided with a unique giving way method on the fixing block 70 through the ingenious placement of the chip 251 and the capacitor 253, and the arrangement of the cable welding piece 22, so that each pair of the high-speed cable welding pieces 220 is connected to the pair of terminal welding pieces 21 closest to it, so as to shorten the length of the high-speed conductive path 230. Specifically, in the present invention, the length of the high-speed conductive path 230 is less than or equal to 1.0 mm, so that the attenuation of its operating frequency can be reduced to -0.48 dB at 15 GHz. The high-speed conductive path 230 is set as a straight line. Furthermore, a pair of the high-speed conductive paths 230 have the same length and are arranged axially symmetrically along the axis of the delay direction.

[0050] The conductive terminal 12 is welded and connected to the corresponding terminal welding piece 21. The cable 30 is welded and connected to the corresponding cable welding piece 22. To protect the welding point, the cable connector assembly 100 further includes a first glue portion 71 formed by a first glue dotted between the conductive terminal 12 and the terminal welding piece 21, a second glue portion 72 formed by a second glue dotted between the cable 30 and the cable welding piece 22, and a third glue portion 73 formed by a third glue covering the first glue portion 71, the second glue portion 72 and the circuit board 20 between the first glue portion 71 and the second glue portion 72. Because at the contact point between the high-speed line 31 and the circuit board 20, in addition to the conductive material on the circuit board 20, the cable 30 itself includes an inner conductor 310 and a shielding layer 312. Compared with the conductive material at the contact point between the conductive terminal 12 and the circuit board being the conductive terminal 12, the conductive material at the connection point between the cable 30 and the circuit board 20 is more than the conductive material at the connection point between the conductive terminal 12 and the circuit board 20. Therefore, the impedance at the connection point of the cable 30 is lower, and the impedance at the connection point of the conductive terminal 12 is larger. In order to match the impedance at the two places, it is necessary to increase the impedance at the welding point of the cable 30 and reduce the impedance at the welding point of the conductive terminal 12. In the present invention, the impedance at the two places is adjusted by selecting and distributing the glue. Specifically, the first glue and the second glue are the same glue, and the third glue is different from the first glue and the second glue. The first glue and the second glue are UV glues with a dielectric constant of 4.6 and a dielectric constant change rate of 0.0393. The third glue is a hot melt glue with a dielectric constant of 2.1 and a dielectric constant change rate of 0.0001. In addition, the glue applied at the welding point between the cable 30 and the circuit board 20 is less than the glue applied at the welding point between the conductive terminal 12 and the circuit board 20 .

[0051] All the cable welding pieces 22 on the first surface 201 and the second surface 202 are arranged in a row along the transverse direction, so as to facilitate welding of the cables 30 on the circuit board at one time, thereby improving production efficiency.

[0052] Each pair of the high-speed cable welding pieces 220 of the cable connector assembly 100 of the present invention is connected to a pair of terminal welding pieces 21 closest thereto, shortening the length of the high-speed conductive path 230, thereby shortening the transmission distance of the high-speed signal in the circuit board 20, thereby facilitating the effective transmission of the high-speed signal.

Claims

1. A cable connector assembly, comprising a docking head that can be matched with a docking connector, a circuit board having one end electrically connected to the docking head, and a cable having another end electrically connected to the other end opposite to the one end of the circuit board, wherein the docking head comprises a plurality of conductive terminals, the circuit board comprises a plurality of terminal welding pieces electrically connected to the conductive terminals, a plurality of cable welding pieces welded to the cables, and a conductive path connecting the terminal welding pieces with corresponding cable welding pieces, the cable comprises a plurality of pairs of high-speed wires for transmitting high-speed signals, the cable welding pieces comprise a plurality of pairs of high-speed cable welding pieces connected to the high-speed wires, and the conductive path comprises a plurality of pairs of high-speed conductive paths connecting the high-speed cable welding pieces and corresponding terminal welding pieces, characterized in that: Each pair of the high-speed cable welding pieces is connected to a pair of terminal welding pieces closest thereto.

2. The cable connector assembly according to claim 1, wherein: The length of the high-speed conductive path is less than or equal to 1.0 mm, so that the attenuation can be reduced to -0.48 dB at an operating frequency of 15 GHz.

3. The cable connector assembly according to claim 1, wherein: The high-speed conductive path is arranged as a straight line.

4. The cable connector assembly according to claim 1, wherein: The lengths of the pair of high-speed conductive paths are the same.

5. The cable connector assembly according to claim 1, wherein: The pair of high-speed conductive paths are arranged axially symmetrically.

6. The cable connector assembly according to claim 1, wherein: The cable welding pieces are arranged in a row along the transverse direction. The circuit board is also provided with electronic components, which are arranged between the row of cable welding pieces in the transverse direction, and at least part of the electronic components are arranged on the rear side of the cable welding pieces.

7. The cable connector assembly according to claim 6, wherein: The electronic component is provided with a length direction and a width direction, and the width direction is arranged along the transverse direction of the circuit board.

8. The cable connector assembly according to claim 6, wherein: The cable also includes a low-speed line and a ground line. The cable welding piece includes a low-speed cable welding piece connected to the low-speed line and a ground cable welding piece connected to the ground line. The low-speed cable welding piece and the ground cable welding piece are located on the outside of the high-speed cable welding piece in the lateral direction.

9. The cable connector assembly according to claim 6, wherein: All the cable welding pieces are arranged in a row along the transverse direction.

10. The cable connector assembly according to claim 1, wherein: It further includes a first glue portion formed by a first glue point-disposed on the conductive terminal and the terminal welding piece, a first glue portion formed by a second glue point-disposed on the cable and the cable welding piece, and a third glue portion formed by a third glue covering the first glue portion, the second glue portion and the circuit board between the first glue portion and the second glue portion, the dielectric constants of the first glue and the second glue are 4.6, and the dielectric constant of the third glue is 2.1.

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