Cable connector capable of reducing signal interference

Abstract

The invention discloses a cable connector capable of reducing signal interference. The cable connector comprises a shell, a printed circuit board, a metal grounding elastic sheet, a joint, a front cover, a metal wire clamp and a cable, the printed circuit board is arranged in the shell and is provided with a first welding pad and a second welding pad. The metal grounding elastic sheet is welded on the second welding pad and abuts against the inner side wall of the housing. The joint is provided with a pin which is welded on the printed circuit board. The front cover is arranged at one end of the shell and located in one end of the shell. And the metal wire clamp is arranged at the other end of the shell. One end of the cable penetrates through the other end of the shell, is arranged in the metal wire clamp and is provided with a ground wire, and the ground wire is welded to the first welding pad. Therefore, the cable connector provided by the invention can provide the second grounding loop with higher speed of reducing the grounding impedance, so as to reduce signal interference.

Description

Technical Field

[0001] The present invention relates to a cable connector, and particularly to a cable connector capable of reducing signal interference. Background Art

[0002] In general electronic devices, grounding is an important method for controlling interference. If grounding and the housing can be correctly combined and used, most interference problems can be solved. In the circuit design of electronic devices, the housing is mainly used as a ground wire connection to ground to become a potential reference point inside the circuit. Grounding can also be considered as a common return path for current (i.e., a ground loop).

[0003] The circuits of existing cable connectors have the following design considerations:

[0004] (1) The braided ground wire on the periphery of the raw cable and the separate bare wire ground wire inside the cable for assistance are welded to the pads on the printed circuit board, and then connected to the housing through the welded pins inside the USB Type-C connector. The housing is welded to the metal wire clip at the rear end of the raw cable, and the metal wire clip is wound around the braided ground wire of the raw cable, thereby forming a ground loop.

[0005] (2) If the ground wire is very thin, the ground potential will change with the change of current, resulting in unstable timing signal levels of the electronic device and deteriorated noise resistance performance. Therefore, users usually try to thicken the ground wire as much as possible so that the ground wire can pass the allowable current located on the printed circuit board.

[0006] (3) There are many integrated circuits on the printed circuit board. Especially when encountering components with high power consumption, due to the limitation of the thickness of the ground wire, a large potential difference will be generated on the ground wire, resulting in a decrease in noise resistance ability. Therefore, when the printed circuit board ground wire system of the cable only consists of digital circuits, if the ground wire forms a closed loop, the potential difference value will be reduced, and the noise resistance ability of the electronic device will be improved.

[0007] However, the path of the ground loop of the existing cable connector is long, and the speed of reducing the ground impedance is slow.

[0008] Furthermore, existing cable connectors usually achieve the effect of reducing signal interference by increasing the number of ground wires or the diameter of the ground wire, but this will cause the cable connector to be too hard to bend. Summary of the Invention

[0009] The main object of the present invention is to provide a cable connector capable of reducing signal interference, with a shorter path of the ground loop and a faster speed of reducing the ground impedance.

[0010] Another object of the present invention is to provide a cable connector that can reduce signal interference without increasing the number or diameter of ground wires.

[0011] To achieve the foregoing object, the present invention provides a cable connector that can reduce signal interference, including a housing, a printed circuit board, a metal grounding spring piece, a connector, a front cover, a metal wire clip, and a cable. The printed circuit board is disposed inside the housing and has a plurality of first pads and a second pad. The first pads are close to a second end of the printed circuit board, and the second pad is disposed between a first end of the printed circuit board and the first pads. The metal grounding spring piece is soldered to the second pad and abuts against the inner side wall of the housing. The connector is disposed at one end of the housing, protruding outside one end of the housing, and has a plurality of pins that are soldered to the first end of the printed circuit board. The front cover is disposed at one end of the housing and is located inside one end of the housing. The metal wire clip is disposed at the other end of the housing. One end of the cable passes through the other end of the housing, is disposed inside the metal wire clip, and has a plurality of ground wires that are respectively soldered to the first pads.

[0012] In some embodiments, the metal grounding spring piece includes a positioning portion and a spring piece body. The positioning portion is disposed on the printed circuit board, and the spring piece body is soldered to the second pad and abuts against the inner side wall of the metal mask.

[0013] In some embodiments, the printed circuit board is provided with a positioning hole, and the positioning portion is disposed in the positioning hole.

[0014] In some embodiments, the positioning hole penetrates through the second pad and the printed circuit board.

[0015] In some embodiments, the second pad is close to one side of the printed circuit board.

[0016] In some embodiments, the spring piece body is U-shaped.

[0017] In some embodiments, the housing includes an outer shell and a metal mask. The metal mask is disposed inside the outer shell. The printed circuit board is disposed inside the metal mask. The metal grounding spring piece abuts against the inner side wall of the metal mask. The connector is disposed at a first end of the metal mask and protrudes outside a first end of the outer shell. The metal wire clip is disposed at a second end of the metal mask. One end of the cable passes through a second end of the outer shell.

[0018] In some embodiments, the cable connector further includes a front cover that is disposed at the first end of the metal mask and is located inside a first end of the outer shell.

[0019] The function of the present invention is that, in addition to being able to provide the first grounding loop of the original prior art, the cable connector of the present invention can also provide a second grounding loop with a faster speed of reducing the grounding impedance to reduce signal interference.

[0020] Furthermore, since the cable connector of the present invention can provide a second grounding loop with a faster speed of reducing the grounding impedance, it is not necessary to achieve the effect of reducing signal interference by increasing the number or diameter of ground wires, making the cable softer and easier to bend. Brief Description of the Drawings

[0021] Figure 1 is a perspective view of the cable connector of the present invention that can reduce signal interference;

[0022] Figure 2 is an exploded view of the cable connector of the present invention that can reduce signal interference;

[0023] Figure 3 is Figure 1 a cross-sectional view taken along line III-III of

[0024] Figure 4 is a perspective view of the cable connector of the present invention that can reduce signal interference.

[0025] Explanation of the Reference Numerals in the Drawings:

[0026] 10: Housing

[0027] 11: First End

[0028] 12: Second End

[0029] 20: Metal Shield

[0030] 21: First End

[0031] 22: Second End

[0032] 30: Printed Circuit Board

[0033] 301: First End

[0034] 302: Second End

[0035] 31: First Pad

[0036] 32: Second Pad

[0037] 33: Positioning Hole

[0038] 40: Metal Grounding Spring

[0039] 41: Positioning Portion

[0040] 42: Spring Body

[0041] 50: Connector

[0042] 51: Pin

[0043] 60: Front Cover

[0044] 70: Metal Clip

[0045] 80: Cable

[0046] 81: Ground Wire

[0047] 100: Housing Detailed Embodiment

[0048] The following will, in conjunction with the accompanying drawings and component symbols, provide a more detailed description of the embodiments of the present invention, enabling those skilled in the art to implement it after studying this specification.

[0049] Figure 1 is a perspective view of the cable connector of the present invention that can reduce signal interference. Figure 2 is an exploded view of the cable connector of the present invention that can reduce signal interference. Figure 3 is Figure 1 a cross-sectional view of line III-III of Figure 4 is a perspective view of the cable connector of the present invention that can reduce signal interference. As Figures 1 to 4 shown, the present invention provides a cable connector that can reduce signal interference, including a housing 100, a printed circuit board 30, a metal grounding spring piece 40, a connector 50, a front cover 60, a metal clip 70, and a cable 80. The printed circuit board 30 is disposed inside the housing 100 and has a plurality of first pads 31 and a second pad 32. These first pads 31 are close to a second end 302 of the printed circuit board 30, and the second pad 32 is disposed between a first end 301 of the printed circuit board 30 and these first pads 31; in other words, compared with the first end 301 of the printed circuit board 30, the position of the second pad 32 is closer to these first pads 31. The metal grounding spring piece 40 is soldered to the second pad 32 and abuts against the inner sidewall of the housing 100. The connector 50 is disposed at one end of the housing 100, protruding beyond one end of the housing 100, and has a plurality of pins 51, and these pins 51 are soldered to the first end 301 of the printed circuit board 30. The front cover 60 is disposed at one end of the housing 100 and is located inside one end of the housing 100. The metal clip 70 is disposed at the other end of the housing 100. One end of the cable 80 passes through the other end of the housing 100, is disposed inside the metal clip 70, and has a plurality of ground wires 81, and these ground wires 81 are respectively soldered to these first pads 31.

[0050] The following will further illustrate two grounding circuits of the cable connector of the present invention.

[0051] The sequence of the first grounding loop is as follows: (1) the ground wire 81 of the cable 80; (2) the printed circuit board 30; (3) the pins 51 of the connector 50; (4) one end of the housing 100; (5) the side wall of the housing 100; (6) the wire clamp 70; (7) the braided ground wire inside the cable 80 (not shown in the figure).

[0052] The sequence of the second grounding loop is as follows: (1) the ground wire 81 of the cable 80; (2) the printed circuit board 30; (3) the metal grounding spring piece 40; (4) the side wall of the housing 100; (5) the wire clamp 70; (6) the braided ground wire inside the cable 80 (not shown in the figure).

[0053] Since the position of the second solder pad 32 is relatively close to the first solder pads 31, the distance from the ground wire 81 of the cable 80 to the metal grounding spring piece 40 is significantly smaller than the distance from the ground wire 81 of the cable 80 to the pins 51 of the connector 50. Compared with the path of the first grounding loop, the path of the second grounding loop is significantly shorter, and the speed of reducing the grounding impedance is faster. Therefore, in addition to being able to provide the first grounding loop of the original prior art, the cable connector of the present invention can also provide a second grounding loop with a faster speed of reducing the grounding impedance to reduce signal interference.

[0054] Furthermore, since the cable connector of the present invention can provide a second grounding loop with a faster speed of reducing the grounding impedance, there is no need to increase the number or diameter of the ground wires 81 to achieve the effect of reducing signal interference, making the cable 80 relatively soft and easy to bend.

[0055] In addition, the metal grounding spring piece 40 can always remain in contact with the housing 100 through its elastic force, so it can serve as a bridging structure directly connecting the housing 100 and the printed circuit board 30 to maintain the conduction of the second grounding loop.

[0056] As Figure 2 、 Figure 3 and Figure 4 shown, in a preferred embodiment, the metal grounding spring piece 40 includes a positioning portion 41 and a spring piece body 42. The positioning portion 41 is disposed on the printed circuit board 30, and the spring piece body 42 is welded to the second solder pad 32 and abuts against the inner side wall of the housing 100. Therefore, the positioning portion 41 can be firmly fixed on the printed circuit board 30 to prevent the metal grounding spring piece 40 from detaching from the printed circuit board 30. Furthermore, the spring piece body 42 can always remain in contact with the housing 100 through its elastic force, so it can serve as a bridging structure directly connecting the housing 100 and the printed circuit board 30 to maintain the conduction of the second grounding loop.

[0057] Preferably, the printed circuit board 30 is provided with a positioning hole 33, and the positioning portion 41 is disposed in the positioning hole 33. Thereby, the positioning hole 33 can provide a good fixing effect for the positioning portion 41.

[0058] As Figure 2 , Figure 3 and Figure 4 shown, in a preferred embodiment, the second pad 32 is adjacent to one side of the printed circuit board 30. Therefore, the width of the elastic piece body 42 does not need to be too wide to contact the housing 100, reducing the volume of the metal grounding elastic piece 40, lowering the manufacturing cost of the metal grounding elastic piece 40, and also having the effect of being easy to assemble.

[0059] As Figure 2 and Figure 3 shown, in a preferred embodiment, the elastic piece body 42 is U-shaped. Compared with other shapes, the U-shaped elastic piece body 42 has relatively excellent elasticity and can contact the inner arc wall of the housing 100 more closely.

[0060] As Figure 3 shown, in a preferred embodiment, the positioning hole 33 penetrates through the second pad 32 and the printed circuit board 30. Therefore, whether the length of the positioning portion 41 is long and passes through the positioning hole 33, or the length of the positioning portion 41 is short and hidden in the positioning hole 33, it can be successfully assembled in the positioning hole 33 without being affected by the length of the positioning portion 41.

[0061] In a preferred embodiment, the material of the metal grounding elastic piece 40 is copper alloy or gold plating. Further, materials such as copper alloy or gold plating have high conductivity, which helps to reduce the transmission impedance. However, the present invention is not limited thereto, and any metal can be used as the material of the metal grounding elastic piece 40 of the present invention.

[0062] As Figures 1 to 4 shown, in a preferred embodiment, the housing 100 includes a housing 10 and a metal shield 20. The metal shield 20 is disposed inside the housing 10. The printed circuit board 30 is disposed inside the metal shield 20. The elastic piece body 42 abuts against the inner side wall of the metal shield 20. The connector 50 is disposed at a first end 21 of the metal shield 20 and protrudes outside the first end of the housing 10. The front cover 60 is disposed at the first end 21 of the metal shield 20 and is located inside the first end 11 of the housing 10. The metal wire clip 70 is disposed at a second end 22 of the metal shield 20. One end of the cable 80 passes through the second end 12 of the housing 10.

[0063] The following will further describe two grounding circuits of the preferred embodiment of the cable connector of the present invention.

[0064] The sequence of the first grounding loop is as follows: (1) the ground wire 81 of the cable 80; (2) the printed circuit board 30; (3) the pins 51 of the connector 50; (4) the first end 21 of the metal shield 20; (5) the side wall of the metal shield 20; (6) the wire clamp 70; (7) the braided ground wire inside the cable 80 (not shown in the figure).

[0065] The sequence of the second grounding loop is as follows: (1) the ground wire 81 of the cable 80; (2) the printed circuit board 30; (3) the metal grounding spring piece 40; (4) the side wall of the metal shield 20; (5) the wire clamp 70; (6) the braided ground wire inside the cable 80 (not shown in the figure).

[0066] In some embodiments, the outer shell 10 of the housing 100 and the metal shield 20 may be integrally formed.

[0067] The above are only preferred embodiments for explaining the present invention, and are not intended to limit the present invention in any form. Therefore, any modifications or changes made to the present invention in the same inventive spirit should still be included in the scope intended to be protected by the present invention.

Claims

1. A cable connector capable of reducing signal interference, comprising: a housing; a printed circuit board disposed inside the housing and having a plurality of first pads and second pads, the plurality of first pads being close to the second end of the printed circuit board, and the second pads being disposed between the first end of the printed circuit board and the plurality of first pads; a metal grounding shrapnel welded to the second pads and abutted against the inner side wall of the housing; a connector disposed at one end of the housing, protruding beyond one end of the housing and having a plurality of pins, the plurality of pins being welded to the first end of the printed circuit board; a metal wire clip disposed at the other end of the housing; and a cable, one end of which passes through the other end of the housing, is disposed inside the metal wire clip and has a plurality of ground wires, and the plurality of ground wires are respectively welded to the plurality of first pads.

2. The cable connector capable of reducing signal interference according to claim 1, wherein, The metal grounding shrapnel includes a positioning portion and a shrapnel body, the positioning portion being disposed on the printed circuit board, and the shrapnel body being welded to the second pads and abutted against the inner side wall of the housing.

3. The cable connector capable of reducing signal interference according to claim 2, wherein The printed circuit board is provided with a positioning hole, and the positioning portion is disposed in the positioning hole.

4. The cable connector capable of reducing signal interference according to claim 3, wherein, The positioning hole penetrates through the second pads and the printed circuit board.

5. The cable connector capable of reducing signal interference according to claim 2, wherein, The second pads are close to one side of the printed circuit board.

6. The cable connector capable of reducing signal interference according to claim 2, wherein, The shrapnel body is U-shaped.

7. The cable connector capable of reducing signal interference according to claim 1, wherein, The housing includes an outer shell and a metal shield, the metal shield is disposed inside the outer shell, the printed circuit board is disposed inside the metal shield, the metal grounding shrapnel abuts against the inner side wall of the metal shield, the connector is disposed at the first end of the metal shield and protrudes beyond the first end of the outer shell, the metal wire clip is disposed at the second end of the metal shield, and one end of the cable passes through the second end of the outer shell.

8. The cable connector capable of reducing signal interference according to claim 7, further comprising a front cover, the front cover being disposed at the first end of the metal shield and located inside the first end of the outer shell.

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