Cable assembly

Abstract

The utility model relates to a cable assembly, which comprises a cable and a printed circuit board capable of being connected with the cable, the printed circuit board comprises a metal connecting part, the cable comprises an inner conductor, and the inner conductor of the cable is mechanically and electrically connected with the metal connecting part through a cold connection process. The cable assembly provided by the utility model is good in electrical performance.

Description

[Technical field]

[0001] The utility model relates to a cable assembly, in particular to a cable assembly with good electrical performance. [Background technology]

[0002] The traditional way to solder cables to printed circuit boards is to manually use a soldering iron to solder the cables to the printed circuit board with a soldering rod. When the improved cable is connected to the printed circuit board (PCB), hot bar soldering is used to first print the solder paste on the soldering sheet of the printed circuit board, and then the hot bar is heated by the huge Joule heat generated when the pulse current flows through molybdenum, titanium and other materials with high resistance characteristics; the hot bar is then used to heat and melt the solder paste printed in advance on the PCB soldering sheet to achieve the purpose of soldering. More advanced is laser welding, which is also a non-contact welding process suitable for ultra-small circuit boards and high-temperature sensitive components. It uses controllable laser pulse width, energy, peak power and repetition frequency parameters to accurately control the heating range and time to avoid damage to components on the circuit board.

[0003] Although Hot Bar welding and laser welding are more time-saving than traditional manual soldering iron welding, and also improve product yield, they still need to rely on solder or other solder pastes and fluxes to achieve welding between electronic components through high temperatures. The high-temperature welding process will introduce thermal stress, and rapid heating and cooling can easily cause PCB board expansion and contraction, and even internal circuit cracking. The thickness of the solder on the pad and the uniformity of the solder between the welding pieces will also affect the finished electrical characteristics of the entire cable circuit board assembly. Because of the use of solder, the characteristic impedance at the solder joint in the connector is relatively high, which will also affect the impedance matching between the connector and the cable, resulting in poor SI such as return loss.

[0004] Therefore, it is necessary to provide a cable assembly with good electrical performance. [Contents of the utility model]

[0005] The main purpose of the utility model is to provide a cable assembly with good electrical performance.

[0006] To achieve the above-mentioned purpose, the utility model can adopt the following technical solution: a cable assembly, which includes a cable and a printed circuit board that can be connected to the cable, the printed circuit board includes a metal connecting part, the cable includes an inner conductor, and the inner conductor of the cable and the metal connecting part are mechanically and electrically connected together through a cold connection process.

[0007] Compared with the prior art, the utility model has the following beneficial effects: the inner conductor of the cable of the cable assembly of the utility model is mechanically and electrically connected to the metal connecting part through a cold connection process, so that the electrical performance of the cable assembly is better and the signal transmission is more stable.

Brief Description of the Drawings

[0008] Figure 1 This is the front view of a traditional cable soldered onto a printed circuit board.

[0009] Figure 2 It is a side view of the first embodiment of the cable assembly of the utility model.

[0010] Figure 3 It is a side view of a second embodiment of a cable assembly according to the present invention.

[0011] Figure 4 It is a side view of a third embodiment of a cable assembly according to the present invention.

[0012]

Main component symbol description

[0013] Cable assembly 100, 200, 300 Inner conductor 11

[0014] Cable 10 Inner insulation layer 12

[0015] Printed circuit board 30 Outer insulation layer 13

[0016] Metal connection part 31, 31', 31" Conductor contact part 110, 110', 110" [Specific implementation method]

[0017] See also Figure 1 FIG. 1 is a front view showing a conventional cable conductor being directly soldered to a soldering pad on a printed circuit board.

[0018] See also Figure 2 , which is a first embodiment of a cable assembly 100 according to the utility model. The cable assembly 100 includes a cable 10 and a printed circuit board 30 that can be mechanically and electrically connected to the cable 10. The printed circuit board 30 can be used in a connector (not shown). The printed circuit board 30 includes a metal connection portion 31 connected to the cable 10.

[0019] The cable 10 includes an inner conductor 11, an inner insulating layer 12 covering the inner conductor 11, and an outer insulating layer 13 covering the inner insulating layer 12. The inner conductor 11 includes a pair of conductors arranged in the transverse direction. Each inner conductor 11 includes a conductor contact portion 110 connected to the printed circuit board 30. The inner conductor 11 and the metal connecting portion 31 of the cable 10 are mechanically and electrically connected together through a cold connection process. Cold connection is to expand the contact surface areas of the two surfaces to be connected under the action of concentrated pressure load, so that the oxide film or plating that hinders welding is broken, exposing pure metal, generating interatomic bonding, and the strength and resistance of the joint part are the same as those of the busbar.

[0020] The shape of the metal connection part 31 is flat and roughly rectangular. The cable 10 needs to be pre-processed before being assembled with the printed circuit board 30. After cutting and laser stripping, the inner conductor 11 of the cable 10 is exposed, and then the front end of the exposed inner conductor 11 of the cable 10 is extruded into a flat shape to form the conductor contact part 110. The shape of the conductor contact part 110 matches the shape of the metal connection part 31 of the printed circuit board 30. Then, the metal connection part 31 and the conductor contact part 110 are connected together through a cold connection process, thereby realizing a non-welding assembly between the cable 10 and the printed circuit board 30. The cross-sectional shape of the other parts of the inner conductor 11 except the conductor contact part 110 is circular. Of course, the inner conductor 11 can also be flat. The metal connection part 31 extends forward beyond the front edge of the printed circuit board 30. The metal connection part 31 and the conductor contact part 110 are cold-connected together along the longitudinal direction of the cable by a cold press.

[0021] See also Figure 3 As shown, it is a second embodiment of the cable assembly 200 of the utility model. Compared with the first embodiment, in this embodiment, the metal connection part 31' and the conductor contact part 110' are cold-connected together along the up-down direction perpendicular to the longitudinal direction of the cable by a cold press.

[0022] See also Figure 4 As shown, it is a third embodiment of the cable assembly 300 of the utility model. Compared with the first embodiment, in this embodiment, the cross-sectional shape of the conductor contact portion 110" is circular, and the shape of the metal connecting portion 31" is also set to be circular to match the shape of the conductor contact portion 110".

[0023] In other embodiments, the cross-sectional shape of the conductor contact portion may be a rectangle, and the shape of the metal connection portion may also be a rectangle.

[0024] The material of the metal connection part of most printed circuit boards 30 is pure copper with tin on the surface, so as to match the material of the inner conductor of the cable required for its assembly. The material of the metal connection part of the printed circuit board can also be changed according to the material of the inner conductor of the different cables to be adapted.

[0025] The cable assembly of the utility model uses a cold connection process to mechanically and electrically connect the inner conductor of the cable to the metal connecting part of the printed circuit board, and does not rely on other media, so that the printed circuit board and the cable are integrated purely by the combination of metal atoms, which greatly reduces the impedance of the contact point, improves the matching degree of the metal connecting part on the cable and the printed circuit board, and is conducive to improving the electrical characteristics.

[0026] However, it will be understood that although many features and advantages of the present invention, including some structural and functional details, have been mentioned in the foregoing description, the present invention is merely illustrative and many details may be changed, especially in the shapes, sizes and arrangements of parts within the scope of the principles represented by the broad general meaning of the terms expressed in the appended claims.

Claims

1. A cable assembly, comprising a cable and a printed circuit board connectable to the cable, the printed circuit board comprising a metal connecting portion, the cable comprising an inner conductor, characterized in that: The inner conductor of the cable and the metal connecting part are mechanically and electrically connected together through a cold connection process.

2. The cable assembly according to claim 1, wherein: The inner conductor comprises a conductor contact portion connected to the metal connecting portion, and a shape of the conductor contact portion matches a shape of the metal connecting portion.

3. The cable assembly according to claim 2, wherein: The metal connecting portion is rectangular, and the conductor contact portion is flat.

4. The cable assembly according to claim 3, wherein: The cross-sectional shape of other parts of the inner conductor except the conductor contact part is circular.

5. The cable assembly according to claim 2, wherein: The cross-sectional shape of the inner conductor is circular, and the shape of the metal connecting portion is also circular.

6. The cable assembly according to claim 2, wherein: The cross-sectional shape of the inner conductor is a rectangle, and the shape of the metal connecting portion is also a rectangle.

7. The cable assembly according to claim 2, wherein: The metal connection portion extends beyond an edge of the printed circuit board.

8. The cable assembly according to claim 2, wherein: The metal connection portion and the conductor contact portion are cold-connected together along the longitudinal direction of the cable by a cold press.

9. The cable assembly according to claim 2, wherein: The metal connection portion and the conductor contact portion are cold-connected together along a vertical direction perpendicular to the longitudinal direction of the cable by a cold press.

10. The cable assembly according to claim 1, wherein: The cable further includes an inner insulating layer covering the inner conductor and an outer insulating layer covering the inner insulating layer. The inner conductor includes a pair of conductors arranged in a transverse direction.

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